text:
I was told that the sum of linear and angular momentum is conserved.
Given that angular momentum's direction as a vector is completely arbitrary (I believe there is no physical reason for choosing the cross product going the way it does (that is, perpendicular up or down, it just matters that it's perpendicular), correct me if I'm wrong), and linear momentum is often interchanged into angular momentum, surely the vector sum cannot be conserved?
Or am I wrong, and the meaning is that the magnitude is conserved?
As a sidenote, I suppose this would be a good place to ask why such an odd system was devised for calculating the direction (not magnitude) of angular momentum. Why not have the arrow pointing in the direction of motion, with its base at the point that we are considering angular momentum about? Is it useful simply to compute the conservation of it about a point, as it just involves addition?


Architecture & Engineering
Constructing a building is a complex project, both legally and technically. Consequently, architectural and engineering practice increasingly demands a sound understanding of planning, construction, and commercial law issues. Dr. Benumof works with architects and engineers to help them with the legal aspects of day-to-day architectural and engineering practice and the consequences of the many legal processes and relationships that are part-and-parcel of the construction process. Likewise, Dr. Benumof represents property owners confronted with overlapping issues of law, architecture, and engineering.


text:
Suggest a resource
Men who hold traditional views about gender roles and the "place" of women are more likely to be violent, international research shows. It's these traditional views that are being challenged by a new programme from Family Planning that focuses on young men, their parents and their teachers.
"There is a clear link between the more strongly held ideas of traditional masculinity and a greater likelihood of that individual man using domestic violence against women. Violent men hold different attitudes than the majority of men who do not use violence," Family Planning Chief Executive Jackie Edmond says.
"A significant element of our It's About Mana programme encourages young men to question traditional male values – ideas such as that real men are always in control, have uncontrollable sex drives, deserve a certain entitlement or respect, and that women are objects. Questioning like this – holding these outmoded ideas up to the light - will protect against relationship violence. If young men are involved in discussions that show that most men don't use or condone violence towards women, this will make it harder for violent individuals to justify it as normal behaviour."
Ms Edmond says It's About Mana was developed because young men can often feel like they're a problem and many campaigns aimed at young men focus on things not to do rather than acknowledging and affirming good behaviour. Rather than follow this model, Family Planning wanted to take a strengths-based approach and to produce a resource that acknowledges behaviour that is achievable - such as how to be a good partner and a decent young man.
To learn more visit: _URL_
The Department of Internal Affairs Te Tari
_URL_ as a community service.
New Zealand Government Online:

source: HuggingFaceFW/fineweb-edu


text:
Report
I would like to insert a automatic number field in a report that is not bound to any table. I.E. if I wanted to insert the date or time, I would simply type" =Date() ". However I would like to have every report that I generate include a auto number/random number. Any Suggstions?
PS This is for a MS Access 2000 report page.
Is There A Way To Remove Digits And Digits Only?
Is there a way to remove digits and digits only?
Hello, I feel a little embarrassed. An acquaitance
asked me a question. Namely, he works for a REIT
company and he has to put together a project where
they must retrieve various documents from the
archives. By convention, the documents are stored
according to the name of the street the property is
on, not by the street address number, and prefixes
such as "North" or "South" are ignored in ordering the
He has an excel file with a list of all the
properties, but sadly, the properties are input with
the street number and directional prefixes (e.g.
"East" for "East Clinton" street) in the cell. So
sorting them in the Excel file would not at all
correspond with the order they would appear while
searching in the archives for them.
Is there a way to remove digits and digits only? I am
aware of Len and
http://office. microsoft. com/en-us/ excel/HA01154901 1033.aspx? pid=CL1005705510 33
I'm not sure if this is the right area or not, but how do I make it so that only numbers can be entered into a textbox, or If It dedects that non-digit charachters are entered, It changes the text.
i have an exercise on school which involve time (digital clock) recording i have made my vb and un the program but when i enter the hour, minute and second in the textbox the time in the label stop i don't know how to make it continue working... you help will be vey much apreciated, thanks!
How Many Digits
Is there a way you can tell how many digits are to the left of the deciaml point in a variable dimmed as single? And how can you tell if there are numbers to the left of the decimal point in a variable dimmed as a single?
Hello. i am Running VB 6.0. i am making a countdown clock for school and every time it gets one digit in seconds, like 19:09, it cuts off the 0 and says 19:9. How can i insure that the variable stays two digits?
Hey people do you know how i can get 4 digits to be displayed in a text box?
Sum Of Digits
From memory, so no warranty of any kind
Function SumOfDigits (ByVal Number As Integer) As Integer Dim r As Integer Do While Number > 0 r = r + Number Mod 10 Number = Number / 10 Loop SumOfDigits = rEnd Function
What's the easiest way to find the # of digits (or letters) in a string or in a int? Is there a built in function or do you have to do it manually?
Since I am new with vb i have a little question.
I'm calculating in a ppc program some numbers and i want that the result
only have 2 digits after the comma. Can anyone helpme?
SQL AND ADO SIG DIGITS
I am retrieving a value from the database that resides as "10.0" (a float value) When using Query Analyzer I am retrieving "10.0".
When I run a stored procedure and utilize the ADO object to display the value it shows a "10". "10" is not the same as "10.0" for my application.
Please let me know if there are any settings to ensure that the value is returned as inputted. The alternative I have is to store the values a varchar data.
Note: Implied decimal values will not work for this application. The significance of the data is not known prior to receiving it.
Getting Three Digits Off The Website
The use of my program requires it being added to the startup group. I may be a throwback for even considering these types of things, but because it's going to be permanently running in the background, I want to minimize the footprint in every way possible.
I do, however, want the program to be able to check what the latest version is on the website. All it needs is to pull down is three digits from the website, be it checking the filename of the latest version posted or reading a three character text file.
My question then is can I do this without adding a control? Is there some sort of API that could do this?
If the control is the only way to go, would INet be the best way (smallest footprint) to go about it?
Ok, i know the solution is probably really simple but i don't really know what to search for when looking for a solution.
I am renaming files using a number ordering system but i need the files to be numbered as follows:
If the length of digits is only 2 then:
01, 02, 03, 04, 05...10, 11, 12, 13, 14, 15
If the length of digits is only 3 then:
001, 002, 003...010, 011, 012, 013...100, 101, 102, 103
Obviously i can get the length of digits as Len($String) so that's fine. I just need to know how to insert the preceding zero's (this is so that Windows lists them in the correct order).
Thank you for any help.
Long To Digits?
is there a way that i can divide a long into its seperate digits and put them in an array? ie-


text:
Educators for Excellence-Boston Releases Policy Paper on Addressing Student Trauma in Schools
Teacher-written policy paper was launched at an event advocating for trauma-informed schools
May 5, 2017 (Boston) — Educators for Excellence-Boston (E4E-Boston) released a teacher-written policy paper, "Schools that Heal," which includes a set of recommendations for how schools in Boston and Massachusetts can create safe and welcoming learning environments for students who have experienced trauma. The paper was released last night at an event at the Regal Fenway theater, where E4E-Boston members joined At-Large Boston City Councilor Ayanna Pressley and the Center for Social Innovation in screening the documentary Paper Tigers, which follows one school's success in supporting students who have experienced trauma.
In Boston, teachers have voiced concerns that a lack of awareness, training and resources to help students cope with traumatic experiences is harming their ability to learn and succeed in school. With the recent spike in deportations and hate crimes across the country, many students are experiencing anxiety over the safety of their families. A survey by Children's Hospital found that one in five Boston students have had more than two traumatic experiences.
"I have been working in urban classrooms for thirteen years and seen that trauma has been a constant barrier to students' ability to learn. We need to have a broader conversation and shine a light on trauma; it is one of the biggest threats to student achievement," said E4E-Boston member Nina Leuzzi, kindergarten teacher at Bridge Boston Academy in Dorchester, who was an author of "Schools that Heal."
"Schools that Heal" is the product of teacher-led research on ways to better address the needs of our students. Their school-, district-, and state-level recommendations focus on deepening teachers' ability to teach trauma-impacted students, cultivating a trauma-informed school community and updating the funding formula to reinforce schools with the resources to educate vulnerable students.
"In education we continue to talk about issues of mental health and wellness. Now is the time for us to move beyond talking and take action. We have to show our students and our most vulnerable populations that we are not going to abandon them. Now is the time to look at broader social and emotional issues that impact student learning and work through those with students so they can achieve," said E4E-Boston member Marina Gopie, ninth-grade English Language Arts teacher at Another Course to College in Hyde Park.
"Oftentimes, a child's fear and anxiety about issues at home are hidden wounds that deepen when not properly attended to, affecting his or her development. That's why our teachers believe that addressing trauma in our city's classrooms is so critical to ensuring that their students feel comfortable and supported in school," said Sarah Zuckerman, E4E-Boston Executive Director. "I am so proud of the teachers who authored our recommendations, as well as all the educators who work every day to ensure they create an open and encouraging environment. This paper is a clear example, not only of their dedication, but also how, when teachers are empowered to improve their school communities, they can effect real and meaningful change."
The full policy paper and all recommendations can be found at e4e.org/schoolsthatheal.

source: openbmb/Ultra-FineWeb


SSH local port forwarding doesn't work, opens a TTY connection instead
Posted September 9, 2019 716 views
Linux CommandsUbuntu 16.04
I'm trying to forward a remote port to a local port on my machine. This is the command I'm using
ssh -R 9000:localhost:3000 root@
But instead this opens a terminal connection. Is my SSH misconfigured? What might be the issue?
1 answer
Local port forwarding lets you connect from your local computer to another server. To use local port forwarding, you need to know your destination server, and two port numbers.
You can try to achieve this using the following command:
ssh -L 9000:localhost:3000 host/serverIPaddress
Basically you need to slightly modified your command not to use root@IP in the end.
Let me know how it goes.
Submit an Answer


text:
Physical Modeling of Barbers Point Harborby Gordon S. Harkins, Coastal Engineering Research Cent, Vicksburg, United States,
Michael J. Briggs, Coastal Engineering Research Cent, Vicksburg, United States,
Document Type: Proceeding Paper
Part of: Coastal Zone '93
Abstract: Physical modeling is a practical tool in the design of coastal projects. A physical model of Barbers Point Harbor located on the island of Oahu, Hawaii was constructed so that different harbor configurations could be investigated. Both short period (less than 25 seconds) and long period waves were analyzed to determine the best relationship between channel configuration and wave climate.
Subject Headings: Ports and harbors | Physical models | Wave climates | Ocean waves | Islands | Coastal environment | Long waves | Decision support systems | North America | Hawaii | United States
Services: Buy this book/Buy this article
Return to search

source: m-a-p/FineFineWeb


RSS
Methods to Repair Corrupted MDF and LDF Files
03 Feb
MS SQL Server is a relational database management system that is used for storing and retrieval of data when requested by other applications. The SQL database mainly comprises of three files- MDF, NDF and LDF. The first two files from the primary and secondary database of SQL Server and the latter stores the log database of SQL server database transactions. While the data files and the log file are accessed by a common server, these files do not share the same location for their storage. Both the data files and the log file are associated with SQL server; in this blog however, we will restrict our discussion to how to repair corrupted .mdf and .ldf files.
Primary & Log Database of SQL Server
Primary database aka Main Database File (MDF) as the name suggests is the main database file of SQL Server that are associated with other files. There exists only a single MDF file for every SQL Server database, which stores data items like triggers, views, stored procedures, etc. It would not be wrong to say that MDF file is the primary element for administration of SQL database.
The LDF (Log Database File) store the entire log information of the transactions or activities carried out in the SQL Server. They play a very crucial role in the restoration of SQL server data in cases of data disaster. The size limitation of LDF is decided at the time of the database designing. Information related to records updation, record deletion, insertion of new record, etc.
Corruption in MDF and LDF Files
Maintaining the database integrity of SQL server is the top priority of the users as any mishap can lead to loss of data that at times cannot be recovered easily. There can be umpteen reasons, which can end the MDF and LDF files in a corrupted state. Some of the reasons for MDF and LDF corruption are:
 1. The biggest reason behind the corruption of MDF and LDF files is the storage size. In case the data exceeds the limit of MDF and LDF file, corruption is likely to occur.
 2. In case the SQL server database is modified during the DROP operation, there are great chances of MDF and LDF files corruption.
 3. Hardware issues such as problem in the hard drive sector storing the SQL database, may lead to corruption of the database.
 4. Virus intrusion is also an important factor when it comes to corruption of MDF and LDF files.
Manual Solutions to Repair Corrupted MDF and LDF Files
In order to repair a corrupt MDF and LDF file, DBCC CHECKDB command can be used. It recovers the data from a corrupt SQL database file that has been damaged due reason such as logical corruption. This involves running an executable code in the SQL server in order to repair corrupted MDF and LDF files.
dbcc-checkdb
Note: Before running the DBCC CHCKDB command, the backup of the existing database should be taken.
In case the repair process fails and the backup of the MDF and LDF files does not exist, the user will not be able to restore the database back to its original state and hence will end up in having a corrupt MDF and LDF file.
Alternate Solution to Repair Corrupted MDF and LDF Files
Regarding the drawbacks of the manual procedure to repair corrupted MDF and LDF files, third party solutions are preferred over them. One such commercial utility that can be deployed for repair corrupted MDF and LDF files is SQL Server Database Recovery Tool. The software recovers the entire data from corrupt MDF and LDF files and save it in SQL compatible scripts or directly in SQL server database.

2 Comments
Posted by on February 3, 2016 in General topics

2 responses to "Methods to Repair Corrupted MDF and LDF Files
 1. Mustafa EL-Masry
 February 4, 2016 at 5:39 PM
 Tremendous Good Post

 2. jacksonandrew771
 February 4, 2016 at 5:42 PM
 Thanks my friend

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text:
"Finland and Colorado have a lot to offer to each other"
Finland and Colorado have strengthened their collaboration in the space sector: in February 2022, Finland and Colorado signed a memorandum of understanding, which is a continuation of their longstanding cooperation in science and technology. The monitoring committee for the science and technology agreement met in Helsinki last week.
International collaboration is of crucial importance to space activities, and Finland's space sector is embedded in a vast international network of cooperation. With some partners, Finland aims to deepen its collaboration even further. In this context, Finland has signed a memorandum of understanding with Colorado in February 2022.
The goal of the cooperation is to identify and harness the potential for collaboration between Finnish and Coloradan space companies and research organizations. Kimmo Kanto, head of Business Finland's space team, comments: "We are assessing the capabilities of Finland's and Colorado's space sectors and are working towards a collaborative ecosystem that brings both parties together."
The cooperation between Finland and Colorado is a continuation of a longstanding cooperation in science and technology. Last week, the monitoring committee of the science and technology agreement convened in Helsinki. Jonna Lehtinen, Development Manager at the Ministry of Economic Affairs and Employment, comments: "Climate-related remote sensing and space research were an important topic of discussion in the committee meeting."
New collaboration prospects with NASA and NOAA
In June, Kimmo Kanto participated in a visit to Denver, Colorado, as part of the Team Finland delegation, which featured representatives of Finnish space companies such as ABOA Space Research, Aurora Propulsion Technologies, ICEYE, Kuva Space, and Skyfora.
Kanto describes the atmosphere as inspiring and regards the timing of the cooperation agreement as favorable: "Thanks to Business Finland's New Space Economy-program, Finland has a comprehensive overview of its growth-oriented and export-capable space companies. This significantly enhances their opportunities for international expansion."
Efforts to promote the international growth of space companies further focus on reducing market barriers between Finland and the United States. Already today, Finnish space companies are active in the U.S., such as ICEYE Oy's subsidiary ICEYE US, which received its first task order from NASA in August. Kanto states: "We hope that the agreement will create more business opportunities between Finnish and Coloradan space companies and strengthen our collaboration with NASA and NOAA, the U.S. Oceanic and Atmospheric Administration."
A natural collaboration partner for Finland
The state of Colorado is the second-largest aerospace center in the United States and aims to expand its cooperation with growth-oriented companies in the rapidly evolving space sector. "Colorado is a natural collaboration partner for Finland. Finland and Colorado have a lot to offer to each other, and the potential for collaboration is significant", comments Kanto.
Primarily, the collaboration will concentrate on advancing sustainability and improving climate resilience. Kanto considers the collaboration potential between research institutions to be substantial, as both Finland and Colorado are pioneers in the fields of atmospheric and space weather research.
The collaboration will further extend to maritime traffic monitoring, enhancing agriculture, monitoring natural resources, and advancing quantum technology. Finland has established high-quality supercomputing capabilities, such as the LUMI supercomputer of the Finnish IT Center for Science (CSC), and Professor Minna Palmroth's Vlasiator space weather simulator at the University of Helsinki. Last year, the IT Center for Science (CSC) signed an agreement with Colorado, which enables Coloradan research organizations to utilize LUMI data.
© SpaceFinland: Kimmo Kanto has extensive experience of working in the Finnish space sector: in the early stages of his career, he worked as a geophysicist in the private sector, where he focused on the development of satellite-based services and space business. In 2005, Kanto joined Tekes (now Business Finland), where he has held positions as an expert, unit leader, and decision-maker for financing. He represents Business Finland in the space affairs council and serves as Finland's chief delegate in the ESA Council.
© Fade Creative / CSC: Europe's fastest supercomputer is located in Kajaani.
Kimmo Kanto, Head of Space, Business Finland: kimmo.kanto(@)businessfinland.fi
Jonna Lehtinen, Development Manager, Ministry of Economic Affairs and Employment: jonna.lehtinen(@)gov.fi


text:
Date: June 1, 1939
Creator: Robinson, Russell G. & Delano, James B.
Description: The drag of closed-cockpit and transport-type windshields was determined from tests made at speeds from 200 to 440 miles per hour in the NACA 8-foot high-speed wind tunnel. This speed range corresponds to a test Reynolds number range of 2,510,000 to 4,830,000 based on the mean aerodynamic chord of the full-span model (17.29 inches). The shapes of the windshield proper, the hood, and the tail fairing were systematically varied to include common types and a refined design. Transport types varied from a reproduction of a current type to a completely faired windshield. The results show that the drag of windshields of the same frontal area, on airplanes of small to medium size, may account for 15% of the airplane drag or may be reduced to 1%. Optimum values are given for windshield and tail-fairing lengths; the effect, at various radii is shown. The longitudinal profile of a windshield is shown to be most important and the transverse profile, to be much less important. The effects of retaining strips, of steps for telescoping hoods, and of recessed windows are determined. The results show that the drag of transport-type windshields may account for 21% of the fuselage drag or may be reduced ...
Contributing Partner: UNT Libraries Government Documents Department


event occurred.
On the other hand,a state-based dynamic relationship is associated with
two attributes tstart and tend corresponding to when the state started
and ended.
Thus,in the DRER model,we have three diﬀerent static entities cor-
responding to sensor reader,object,and location.In addition,an entity
called transaction may be used in order to represent business transac-
tions,though we omit it in the discussion here for simplicity.Each of
the static entities is associated with its own set of static entity tables.
State-based dynamic relationships correspond to sensor location,object
location,and containment.We note that each of these relationships are
dynamic,and naturally have a starting and ending time.Event-based
dynamic relationships occur at a particular instant,and may correspond
to an observation,which is generated by a sensor reading an EPC tag.
The diﬀerent static and dynamic tables in the DRER model,together
with their attributes are summarized below:
Entity
Type
Table Attributes
Sensor
Static
SENSOR(sensor
epc,name,description)
Object
Static
OBJECT(object
epc,name,description)
Location
Static
LOCATION(location
id,name,owner)
Observation
Dyn.
OBSERVATION(sensor
epc,value,timestamp)
Containment
Dyn.
CONTAINMENT(epc,parent
epc,tstart,tend)
Obj.Location
Dyn.
OBJECTLOCATION(epc,location
id,tstart,tend)
Sens.Location
Dyn.
SENSORLOCATION(sensor
epc,location
id,
position,tstart,tend)
These tables can be used in conjunction with a variety of SQL queries
in order to resolve interesting aspects about the RFID objects.Some
examples [68] of such queries are as follows:
RFID Object Tracking Queries:The OBJECTLOCATION table carries
A Survey of RFID Data Processing
361
most of the information needed for formulating RFID location tracking
queries.Since the starting and ending time for each object is included
in the table,a query can be performed on an EPC in order to deter-
mine the history of locations for that objects.The precise time taken
for an object to move from one location to another can also be derived
because of the presence of the tstart and tend variables.This history
of locations can be sorted temporally in order to provide the history of
locations for any object.Similarly,missing objects at a location can be
obtained from the OBJECTLOCATION table by comparing the objects at
that location,with the set of objects at any time and location,where
they were previously known to be complete.The precise formulation of
these queries is provided in [68].
RFID Data Monitoring Queries:It is also formulate containment
or observation queries for any particular snapshot by making use of the
CONTAINMENT,OBJECTLOCATION and OBSERVATION queries.In addition
temporal joins can be performed between diﬀerent objects by formulat-
ing queries which examine the overlap between their tstart and tend
variables.For example,recursive containment can be easily queried with
this approach with the use of CONTAINMENT table,and temporal aggre-
gation can be performed on the number of items which passed through
a location at a given time,by making use of the tstart and tend at-
tributes of the OBJECTLOCATION table.Thus,the tables supported by
the DRER model are expressive and can support a wide range of SQL
queries [68].
We note that in order to transform the noisy RFID into the high
level semantic tables discussed above,which are consistent and non-
redundant,a number of rules need to be deﬁned.These rules correspond
to data ﬁltering,location transformation,and data aggregation.We note
that many relationship tables (such as containment tables) are not ex-
plicitly speciﬁed in the RFID data,and they need to be inferred and
aggregated,based on the observation patterns.A rule-based framework
is proposed in [68] in order to automate the transformation of primitive
events into semantically cleaner representations.For example,a data
ﬁltering rule can be deﬁned to scan the data within a sliding window in
order to determine if there are duplicates of the same event in multiple
readers.One of these can then be dropped.Similarly,when a new lo-
cation for an object is deﬁned by a particular reader,the ending time
stamp for the last location is updated to the current time.An entry is
created in the OBJECTLOCATION table which a new starting time stamp,
which is the current time.The ending time-stamp for the new entry
is set to UC (Until Changed).This is an example of a location trans-
formation rule.An example of a data aggregation rule is one in which
362
MANAGING AND MINING SENSOR DATA
when a set of pallets are loaded onto a track,the set of EPC readings
for all the objects are inserted as the children of the EPC of the truck,
in the CONTAINMENT table.Thus,an event detector continuously mon-
itors the observation streams,and triggers actions which generate the
corresponding data.
One challenge with managing RFID data,which was noticed in [68]
was that RFID data typically have very large volume,which can lead to
accumulation of large volumes of data.This can lead to slower queries
and updates.An important observation about RFID data is that they
typically have a limited life span,starting fromthe time it is ﬁrst tagged,
to the time when it is sold to the customer.Therefore,the database
management approach in [68] partitions the data into an active set of
RFID data,which corresponds to items which are frequently updated;
and an inactive set of data,which corresponds to items that are no longer
updated frequently.Since the majority of the data becomes inactive over
time,this leads to much faster queries of the active data during its life-
cycle.
3.1 Eﬃcient Warehousing of RFID Data
A related,but somewhat diﬀerent kind of RFID data management
and warehousing has been discussed in [29].This approach is designed
towards ﬁnding the relevant paths of items in the RFID scenario.This
process is also designed towards modeling the dynamic relationships such
as containment,except that it does so not just for explicit containment,
but also for items which move together.Also,the mapping relationships
are modeled somewhat diﬀerently.The approach is also designed for
tracking speciﬁc measures associated with the RFID items,which is
typical in a data warehouse.
As in the case of [68],methods need to be designed to handle the
massive redundancy of diﬀerent types.These could be because of mul-
tiple readings of the same item from the same reader at multiple times.
Consider the situation,where a typical reading from an RFID tag is of
the form (EPC,Location,Time).We note that the same tag may be
read many times at the same location,even though no signiﬁcant event
may have occurred involving the time.As in [68],the only two readings
which are signiﬁcant are the ﬁrst and last moment at which the items
were read.The work in [29] uses two main kinds of compression.
Temporal Compression:Multiple scans of the same code at the
same (virtual) location can be compressed signiﬁcantly.For exam-
ple,if an item is loaded on an ship from one port to another,then
the virtual location of the item corresponds to "ship" and all scans
A Survey of RFID Data Processing
363
of the item aboard the ship can be reduced to two scans.In prac-
tice,the location is associated with the identiﬁer of a ﬁxed sensor
reader with a virtual location,such as "ship".These two scans cor-
respond to the time that the item was loaded on the ship,and the
time at which the item was removed from the ship.Therefore,by
storing the times when the item was ﬁrst moved to the vicinity of
the reader and the time that it was moved away fromthe reader,all
the relevant information is represented [29].This allows us to rep-
resent the item in the form (EPC,Location,TimeIn,TimeOut).
We note that the TimeIn and TimeOut variables are similar to
the tstart and tend variables proposed in [68] for maintaining
the object location tables.
Group-based Compression:In most real scenarios,RFIDitems
often move together in groups or consignments.For example,all
items which are loaded onto the ship stay together throughout the
trip.Therefore,all the individual RFID of the items can be re-
placed by a single generalized identiﬁer,or GID.In practice,groups
of items may split or merge,as items are loaded at ports from dif-
ferent sources,or split into diﬀerent destinations.Correspondingly,
the generalized identiﬁers can be arranged hierarchically,in order
to eﬀectively represent these merges and splits.
One challenge with the use of RFID data with traditional data ware-
housing techniques,is that traditional warehousing methods do not prop-
erly consider the spatial links between diﬀerent data records,which are
essential in the RFID scenario.Therefore,traditional dare warehousing
techniques may fail,when they are directly applied to RFID data.For
example,consider the situation,where the cleaned RFID representation
is of the form (EPC,Location,TimeIn,TimeOut:Measure),where
"Measure" could correspond to a value such as the quantity of the item
present at the given location.Such a representation could be used in or-
der to respond to queries such


What are some examples of selective media
Nutrient medium
Synonyms: culture medium, growth medium
1 definition
A Nutrient medium is a sterile matrix with defined environmental conditions. Culture media are mainly used in microbiology and are used to cultivate microorganisms or human or animal cells.
2 classification
2.1... according to consistency
A distinction is made between two types of culture media based on consistency:
The transition between solid and liquid nutrient media is fluid and depends, among other things, on the agar or gelatine content, which ensures the thickening of a nutrient medium. Culture media with a lower agar content are sometimes delimited as the third group of so-called "semi-solid" media.
2.2... according to nutrient content
Another dimension is the division of the nutrient media according to the nutrient composition. A distinction is made here:
 - Mineral medium
 - Minimal medium
 - Minimal medium with growth substances
 - simple complex medium
 - Complex medium
2.3... according to the objective
 - Selective nutrient media or selective media: nutrient media whose nutrient content or composition only allow the growth of certain microorganisms or cells.
 - Differential culture media or differential media: culture media that allow the growth of several microorganisms used, but are composed in such a way that distinguishable colonies form.
Some culture media can combine both of the above properties, e.g. MacConkey agar or mannitol salt agar.
3 application
Liquid Culture media are used:
Festivals Culture media are mainly used for analysis purposes because they also enable quantitative determination. Since the multiplying microorganisms cannot freely distribute themselves in the medium, a visible point or spot forms around each initial germ. The number of these CFU (colony-forming unit) allows a conclusion to be drawn about the original number of germs.
The process of introducing samples into or onto a nutrient medium is called inoculation.
4 composition
In addition to water, culture media mainly contain culture-specific nutrients and salts. The nutrients are also called substrates and in most cases are carbohydrates, proteins and fatty acids. Nutritional salts provide ions and molecules that are essential for the organism, such as ammonium, potassium, sodium, magnesium, phosphate and sulfate.
Other possible components are:
5 Manufacturing
To produce a nutrient medium, the nutrients and additives are mixed together according to a recipe and dissolved in demineralized water (possibly under flowing steam). This is followed by sterilization (usually in an autoclave). Additives that would be destroyed by the sterilization can then be added through a sterile filter.
Ready-to-use culture media are also often used in practice.


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Pine Cone Trees
It's easy to turn ordinary pine cones into these unique, sparkly Thanksgiving decorations.
What You'll Need:
- Large pine cones
- Craft glue
- Paper plates or disposable dish
- Shiny glass or plastic beads (about 1/4 inch in size)
For beaded "trees": Set a pine cone upright on newspaper. Pour some white glue in a small dish. Hold a bead with a pair of tweezers and dip it in the glue.
Stick the bead on one of the cone bracts. Keep gluing beads on the cone until it is covered to your liking. Allow to dry.
For glittery "trees": Pour white glue into one paper plate and glitter into another. Roll the cone in glue first, then in glitter. Allow to dry.
If you'd like, you can make winter scenes with your trees. Set them on a sheet of white cotton or quilt batting to represent snow, and add some figurines. You can even use a mirror for a frozen pond and put your trees around it.
On the next page you'll learn how to make a cornucopia of crafts from a cornucopia.


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Mooreville High School - Water Quality Sampling and Testing
November 5, 2012
Traveling all the way from north Mississippi, Adelia Wright brought her students on a two-night stay with us here at GCRL. Unfortunately, bad weather made it imposible for the group to show off their stewardship on a marine debris removal trip. However, they became experts at water quality testing. They produced extensive data by collecting samples at several locations along the coast and performing water quality tests. They also learned about mapping, GPS usage, and watersheds.
Click a thumbnail to view the full-size photo.


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BlueFolder has built-in support for tracking equipment owned by your customers. You can customize the fields that are part of equipment records.
Customizable Built-In Fields
The following fields can be customized:
- Equipment Type - A list field that is used to categorize equipment by type.
- External Id - A text field that can be used to assign an Id that references external data.
You can add unlimited custom fields to equipment records.
Custom Field Data Types
- Text - a general purpose data field that accepts any type of data (letters, numbers, special characters, etc).
- List - a value-list field that allows you to specify a list of values from which users must pick.
- Data - a date field that generates a date picker control for users to pick from.
- Number - a data field that only accepts valid numeric values.
- Yes/No - a data field that generates a checkbox control on the screen. Used for true/false values.


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What is the origin of the gaucho in Argentina?
The word gaucho has its origin in the Quichua and Mapuche "huacho", which means orphan.
Its origin is the result of the mixture of two civilizations: the European and the natives of what is now Argentina. Possiby the first gauchos were people who breaked their strings with the past and went to the loneliness of the Great Pampa where there was water, grass and livestock. They developed an incredible ability to master the horse, as well as to use the "boleadoras" (three stones linked by a rope that, when thrown, become entangled in the legs of the cattle), the knife, the bow and the appropriate techniques for the salting, method destined to preserve food, of one of the best meats in the world.
On the 6th of December, the National Gaucho Day is celebrated because on that date, in 1872, it was published "El Gaucho Martín Fierro" for the first time. Jose Hernández, from the voice of Martín Fierro, showed the world what the life of the countryman was like, his love for freedom, for his land, his manhood and his courage. The gaucho was a person of great respect and who fulfilled his words, also known for his solidarity which is where the term "gauchada" comes from, which means favor in argentine slang. Today "the current gauchos" carry out activities in estancias, not only in the Pampa plain, but all over the country.


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Change starts with planting trees. It starts with turning off faucets, and reusing and recycling. Most importantly, change starts with us!
This encouraging preschool read-aloud demonstrates simple yet mighty examples of environmental activism and ways in which young readers can take care of the earth. Whether it's biking places with family or picking up litter with friends, Change Starts with Us proves that everyone has the power to build a better world.
- Board Book


oracle odbc connection string example
Oracle RAC Progress
Instead of a dialog box, some applications might require a connection string that specifies, using particular attributes, how a driver connects to a data source.. IBM Integration ODBC Database Extender encapsulates for example after an Oracle instance The connection string takes the form
OLE DB, ODBC, and Oracle Connection Pooling For example, the following connection string disables OLE DB session pooling and automatic transaction enlistment. The Oracle ODBC Driver translates ODBC SQL syntax into syntax that If the following keyword is specified in the connection string, the Oracle ODBC Driver does not
Simba Oracle ODBC Driver 1.2.4 Installation and Configuration Guide. The following is an example of a connection string for a connection that uses a DSN: DSN= Simba Oracle ODBC Driver 1.2.4 Installation and Configuration Guide. The following is an example of a connection string for a connection that uses a DSN: DSN=
odbc how to make a connection string for oracle that
Connection string problem Oracle Community. connection string format and the microsoft odbc driver for oracle supports the connection string format of for example, a connection string that connects to, an example of a connection string using integrated security is shown in the following snippet: driver={microsoft odbc for oracle};server=myoracledb;).
oracle odbc connection string example
Connect to a remote ODBC database source without a DSN. connection_string. contains the oracle instance to connect to. it can be an в» easy connect string, example #3 oci_connect() with an explicit character set, an example of a connection string using integrated security is shown in the following snippet: driver={microsoft odbc for oracle};server=myoracledb;).
OLE DB ODBC and Oracle Connection Pooling
oracle odbc connection string example
The Oracle ODBC Driver translates ODBC SQL syntax into syntax that If the following keyword is specified in the connection string, the Oracle ODBC Driver does not ODBC from C Tutorial Part 1 Returned Connection String; Full Connection Example; The ODBC connection string contains a series of attributes names and values
ODBC Tutorial on Oracle RAC. you want to connect in the connection string. For example, for ODBC Oracle drivers support connection failover and client 9/05/2011В В· The connection is just a string so you want to use concatenate operators to build the string... cn.Open "driver={Microsoft ODBC for Oracle};" & _ "server


Generating a workflow execution Process - 6.1
Talend Data Fabric Studio User Guide
EnrichVersion
6.1
EnrichProdName
Talend Data Fabric
task
Data Governance
Data Quality and Preparation
Design and Development
EnrichPlatform
Talend Studio
Talend Studio enables you to automatically generate Processes based on the workflows listed under the Workflow node in the MDM Repository tree view.
Once this Process is generated, you can attach it to a Trigger. When the Trigger is kicked off, it launches the Process that will initiate the workflow itself. This will list any required intervention on data records in the Web User Interface in the form of workflow tasks.
For more information on creating and managing Triggers, see Triggers. For more information on workflow tasks, see Talend MDM Web User Interface User Guide.
Prerequisite(s): You have already connected to the MDM server from Talend Studio. At least one workflow has been created and deployed on the MDM server.
To generate a Process based on a workflow:
 1. In the MDM Repository tree view, expand the Workflow node.
 2. Right-click the workflow for which you want to generate a Process and select Generate Workflow Caller Process.
 A dialog box is displayed.
 3. From the Data Models list, select the data model to which you want to attach the workflow.
 4. Select a business entity from the list, Product in this example.
 The name of the selected business entity is displayed in the Xpath field.
 5. Click Add to close the dialog box.
 The generated Process is listed under the Process node in the MDM Repository tree view.
 Note
 You must deploy your changes to the server for them to be taken into account at runtime.
 6. Double-click the generated Process to open an editor in the workspace that lists the Process parameters.
 One step is automatically defined and listed in the process Steps Sequence area. The step passes the item to the workflow engine using the workflowcontexttrigger plugin. For further information on Processes, see Processes.
 7. Select the Invoke the workflow step to display the step detail and parameters.
The Parameters area gives you access to two different views Source and Sheet. The Source view lists the detail of the automatically generated XML document with all the variables used in the workflow. This document is used to map the MDM attributes values and xpaths to the workflow variables.
Note
Here, you can modify any of the parameters/variables according to your needs and according to what you have defined in the workflow.
The Sheet view displays a tabular list of all the variables used in the workflow. You can use the and buttons below the table to modify these values.
Note
The Use built-in variables check box is selected by default. If your workflow does not need to connect to the MDM server, you can clear this check box.
From this view, it is also possible to invoke any of the workflows deployed on your MDM server. To do this, do the following:
 1. Click the Select workflows... bar to display a list of all the workflows already deployed on your MDM server.
 2. Select the workflow you want to invoke and then click OK to close the dialog box.
 The name of the selected workflow displays in the ID field of the Parameters area.
 3. In the Variables area, use the and buttons below the table to modify the variable names and xpath values according to the workflow you selected.
 4. Save your modifications.
What you must do now is to define a trigger in order to call this process. When the Trigger is kicked off, it will launches the Process that will initiate the workflow itself. This will list any required intervention on data records in the Web User Interface in the form of workflow tasks. For further information, see Triggers.


Australian Water Information Dictionary
mean seasonal storage range
Expresses the estimated mean seasonal range in the amount of water stored in all water stores (surface, soil and groundwater). A large range is likely to indicate a large use of water from storage during periods with low rainfall, for example through root water uptake from deeper soil or groundwater stores.
Related: MSSR
This definition applies to:


Support Projectors Pro Series Epson Pro L1495U
When and how should I clean or replace the air filter?
 - See below.
 Cleaning the Air Filter
 You need to clean the projector's air filter in the following situations:
 - The filter or vents get dusty.
 - You see a message telling you to clean it.
 - The projector's Filter light is orange or flashes orange.
 1. Turn off the projector, wait for the projector to beep, and unplug the power cord.
 2. Slide the air filter cover latch and open the air filter cover.
 3. Pull the air filter out of the projector.
 4. Tap each side of the air filter 4 to 5 times to shake off any excess dust.
 Caution:
 Do not use excessive force when tapping the air filter, or it may crack and become unusable. Do not rinse the air filter in water, or use any detergent or solvent to clean it. Do not use canned air; the gases may leave a residue, or push dust and debris into the projector's optics or other sensitive areas.
 5. Vacuum the front of the air filter (the side with the tabs) to remove any remaining dust.
 Note: If dust is difficult to remove or the air filter is damaged, replace the air filter.
 6. Place the air filter back in the projector as shown and push gently until it clicks into place.
 7. Attach the air filter cover as shown, and press it gently until it clicks into place.
 Related references
 Projector Light Status
 Replacing the Air Filter
 You need to replace the air filter in the following situations:
 - After cleaning the air filter, you see a message telling you to clean or replace it
 - The air filter is torn or damaged
 You can replace the air filter while the projector is mounted to the ceiling or placed on a table.
 1. Turn off the projector, wait for the projector to beep, and unplug the power cord.
 2. Slide the air filter cover latch and open the air filter cover.
 3. Pull the air filter out of the projector.
 Note: Air filters contain polypropylene. Dispose of used air filters according to local regulations.
 4. Place the new air filter in the projector as shown.
 5. Attach the air filter cover as shown, and press it gently until it clicks into place.
 Related references
 Projector Light Status
Published: 11-Jan-2018 Was this helpful? Thank you for the feedback!
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December 13, 1991
L86 Dimmer Modules BTU Dissipation
Heat dissipation in ETC dimmer racks is relatively simple to calculate. Use the following table to calculate either watts per dimmer or BTUs per dimmer, them multiply that number by the number of dimmers in the rack. Note that the watt and BTU figures shown below apply to single dimmer, not dimmer modules. (A module contains more than one dimmer)
We suggest you set air conditioning levels to maintain the temperature in the dimer room at 68 degrees or less. ETC dimmers are designed to operate safely in environments with ambient temperatures of up to 104 degrees but, as with all electronics, keeping things cooler will help improve the service of the equipment.


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Mosenergo PJSC TPPs use the most environmentally friendly type of fuel
The main fuel used by Mosenergo PJSC is natural gas, the most environmentally friendly type of fuel, due to the fact that its combustion leads to much less harmful substances than other types. The share of gas in the fuel balance came to 99.38%. Mosenergo's power plants as back-up fuels used both coal (0.34%) and mazut (0.27%). Diesel fuel share totaled 0.01% in 2020.
Emissions of pollutants are significantly below the maximum allowable level
Power generating boilers at the power plants are fitted with an automated environmental monitoring system, which allows the concentration of gas pollutants to be monitored in real time and, if necessary, enables plant performance activities to be modified in order to reduce emissions. As a result of subsequent work carried out on the boilers, boiler emissions did not exceed any permitted pollutant emission standards.
The Central Laboratory for Environmental Protection (CLEP) at the Mosenergo Department for Ecology takes measurements at the power plant boilers to determine the flue gas concentrations of nitric oxide, nitrogen dioxide and carbon dioxide and to monitor the temperature of flue gases. The condition of the atmospheric air in residential areas near the TPP are also monitored throughout the year.
Mosenergo operates the mobile eco-monitoring
| ||Mosenergo operates the mobile eco-monitoring based on a Ford car.|
The car is equipped with the necessary equipment for on-site analysis of sewage, emissions into the environment or other polluting sources in the area of Mosenergo TPP responsibility in Moscow and the Moscow Region.
Mosenergo is the Leader of Climate Development
In 2017, Mosenergo PJSC won the contest «Leader of Climate Development», established by the Department of Nature Management and Environmental Protection of Moscow. The project «Integrated implementation of combined-cycle technologies at CHP Mosenergo PJSC took first place in the nomination „Contribution to the climate development of the region, the project" Implementation of environmental policy requirements of PJSC Mosenergo PJSC was awarded a diploma in the nomination „Eco-Corporation of the Year of Ecology in Russia".


nLab
exact sequence
Contents
Context
Category theory
Homological algebra
homological algebra
(also nonabelian homological algebra)
Introduction
Context
Basic definitions
Stable homotopy theory notions
Constructions
Lemmas
diagram chasing
Homology theories
Theorems
Contents
Idea
An exact sequence may be defined in a semi-abelian category, and more generally in a homological category. It is a sequential diagram in which the cokernel of each morphism is equal to the kernel of the next morphism.
Definition
Definition in additive categories
Let 𝒜\mathcal{A} be an additive category (often assumed to be an abelian category, for instance 𝒜=R\mathcal{A} = RMod for RR some ring).
Definition
An exact sequence in 𝒜\mathcal{A} is a chain complex C C_\bullet in 𝒜\mathcal{A} with vanishing chain homology in each degree:
n.H n(C)=0. \forall n \in \mathbb{N} . H_n(C) = 0 \,.
Definition
A short exact sequence is an exact sequence, def. of the form
00ABC00. \cdots \to 0 \to 0 \to A \to B \to C \to 0 \to 0 \to \cdots \,.
One usually writes this just "0ABC00 \to A \to B \to C \to 0" or even just "ABCA \to B \to C".
Remark
A general exact sequence is sometimes called a long exact sequence, to distinguish from the special case of a short exact sequence.
Proposition
Explicitly, a sequence of morphisms
0AiBpC0 0 \to A \stackrel{i}\to B \stackrel{p}\to C \to 0
is short exact, def. , precisely if
 1. ii is a monomorphism,
 2. pp is an epimorphism,
 3. and the image of ii equals the kernel of pp (equivalently, the coimage of pp equals the cokernel of ii).
Proof
The third condition is the definition of exactness at BB. So we need to show that the first two conditions are equivalent to exactness at AA and at CC.
This is easy to see by looking at elements when 𝒜R\mathcal{A} \simeq RMod, for some ring RR (and the general case can be reduced to this one using one of the embedding theorems):
The sequence being exact at
0AB 0 \to A \to B
means, since the image of 0A0 \to A is just the element 0A0 \in A, that the kernel of ABA \to B consists of just this element. But since ABA \to B is a group homomorphism, this means equivalently that ABA \to B is an injection.
Dually, the sequence being exact at
BC0 B \to C \to 0
means, since the kernel of C0C \to 0 is all of CC, that also the image of BCB \to C is all of CC, hence equivalently that BCB \to C is a surjection.
Definition
A split exact sequence is a short exact sequence as above in which ii is a split monomorphism, or (equivalently) in which pp is a split epimorphism.
In this case, BB may be decomposed as the biproduct ACA \oplus C (with ii and pp the usual biproduct inclusion and projection); this sense in which BB is 'split' into AA and CC is the origin of the general terms 'split (mono/epi)morphism'.
Definition in pointed sets
It is also helpful to consider a similar notion in the case of a pointed set.
Definition
In the category Set *Set_* of pointed sets, a sequence
(A,a) f (B,b) g (C,c) \array{ (A, a) & \overset{f}{\to} & (B, b) & \overset{g}{\to} & (C, c) }
is said to be exact at (B,b)(B, b) if imf=g 1(c)im f = g^{-1}(c).
For concrete pointed categories (ie. a category 𝒞\mathcal{C} with a faithful functor F:𝒞Set *F: \mathcal{C} \to Set_*), a sequence is exact if the image under FF is exact.
In the case of (abelian) categories like AbAb and RModR-Mod, the two notions of exactness coincide if we pick the point of each group/module to be 00. Such a general notion is useful in cases such as the long exact sequence of homotopy groups where the homotopy "groups" for small nn are just pointed sets without a group structure.
Properties
Computing terms in an exact sequence
A typical use of a long exact sequence, notably of the homology long exact sequence, is that it allows to determine some of its entries in terms of others.
The characterization of short exact sequences in prop. is one example for this: whenever in a long exact sequence one entry vanishes as in 0C n\cdot \to 0 \to C_n \to \cdot or C n0\cdot \to C_n \to 0 \to \cdots, it follows that the next morphism out of or into the vanishing entry is a monomorphism or epimorphism, respectively.
In particular:
Proposition
If part of an exact sequence looks like
0C n+1 nC n0, \cdots \to 0 \to C_{n+1} \stackrel{\partial_n}{\to} C_n \to 0 \to \cdots \,,
then n\partial_n is an isomorphism and hence
C n+1C n. C_{n+1} \simeq C_n \,.
Exactness and quasi-isomorphisms
Proposition
A chain complex C C_\bullet is exact (is a long exact sequence), precisely if the unique chain map from the initial object, the 0-complex
0C 0 \to C_\bullet
is a quasi-isomorphism.
Short exact sequences and quotients
The following are some basic lemmas that show how given a short exact sequence one obtains new short exact sequences from forming quotients/cokernels (see Wise).
Let 𝒜\mathcal{A} be an abelian category.
Lemma
For
ABC0 A \to B \to C \to 0
an exact sequence in 𝒜\mathcal{A} and for XBX \to B any morphism in 𝒜\mathcal{A}, also
AB/XC/X0 A \to B/X \to C/X \to 0
is a short exact sequence.
Proof
We have an exact sequence of complexes of length 2
0 X id X 0 A B C 0 \array{ 0 &\to& X &\stackrel{id}{\to}& X &\to& 0 \\ \downarrow & & \downarrow & & \downarrow & & \downarrow \\ A &\to& B &\to& C &\to& 0 }
and the exact sequence to be demonstrated is degreewise the cokernel of this sequence. So the statement reduces to the fact that forming cokernels is a right exact functor.
Lemma
For
0ABC 0 \to A \to B \to C
an exact sequence and XAX \to A any morphism, also
0A/XB/XC 0 \to A/X \to B/X \to C
is exact.
Examples
Specific examples
Example
Let 𝒜=\mathcal{A} = \mathbb{Z}Mod \simeq Ab. For nn \in \mathbb{N} with n1n \geq 1 let n\mathbb{Z} \stackrel{\cdot n}{\to} \mathbb{Z} be the linear map/homomorphism of abelian groups which acts by the ordinary multiplication of integers by nn. This is clearly an injection. The cokernel of this morphism is the projection to the quotient group, which is the cyclic group n/n\mathbb{Z}_n \coloneqq \mathbb{Z}/n\mathbb{Z}. Hence we have a short exact sequence
0n n. 0 \to \mathbb{Z} \stackrel{\cdot n}{\to} \mathbb{Z} \to \mathbb{Z}_n \,.
Remark
The connecting homomorphism of the long exact sequence in homology induced from short exact sequences of the form in example is called a Bockstein homomorphism.
Classes of examples
References
A standard introduction is for instance in section 1.1 of
The quotient lemmas from above are discussed in
in the context of the salamander lemma and the snake lemma.
Last revised on January 8, 2018 at 21:28:31. See the history of this page for a list of all contributions to it.


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When it comes to tennis equipment, choosing the right racket is crucial. A good racket can help you improve your game, while a bad one can hinder your progress. Among the many factors that determine the quality of this piece of equipment, weight is one of the most important. In this article, we will explore the differences between heavy and light tennis rackets and help you choose the one that is right for your game.
Tennis rackets come in different shapes, sizes, and weights. One of the most important factors to consider when choosing the proper one is its weight.
A heavy unit can provide more power and stability, while a lighter one can offer more speed and maneuverability. In the sections below, we will explore the pros and cons of both types and help you make an informed decision.
Heavy Tennis Racket
Heavy tennis rackets have long been the preferred choice of many professional and advanced players. They are designed to provide maximum power and stability on every shot, allowing players to hit with more pace and depth.
Heavy rackets typically weigh between 11 and 14 ounces and feature larger head sizes that offer a larger sweet spot and more forgiving contact. They also offer better shock absorption, which reduces the risk of injury and fatigue during long matches or training sessions.
One of the key advantages of heavy tennis rackets is their ability to generate power effortlessly. The extra weight of these rackets enables players to hit with more force and momentum, even on shots that require a longer swing or a heavier topspin.
They also offer superior stability and balance, which allows players to maintain their form and technique throughout the match. However, they may require more strength and endurance to wield, especially for players who have a slower swing speed or suffer from arm or shoulder injuries.
When it is all said and done, it is safe to say that heavy tennis rackets are a powerful and reliable choice for players who prioritize power, stability, and consistency on the court.
- More Power: They can generate more power on contact, making it easier to hit winners and put away volleys.
- Stability: Heavy rackets provide more stability and control, making it easier to hit accurate shots and keep the ball in play.
- Larger Sweet Spot: They have larger head sizes, which offer a larger sweet spot, making it easier to hit shots with power and accuracy.
- Reduced Vibration: Heavy rackets offer better shock absorption, reducing the impact on your arm and wrist.
- Less Maneuverability: Heavy rackets can be difficult to maneuver, making it harder to hit shots on the run or react to fast serves.
- More Tiring: These rackets require more effort to swing, which can be tiring over a long match.
- More Difficult to Use: They require a strong swing and good technique, making them more difficult to use for beginners or players with weaker swings.
Light Tennis Racket
Light tennis rackets are generally favored by players who value agility and speed on the court. They are ideal for anyone who prefers a fast-paced game and has a natural swing speed that allows them to generate power without the need for additional weight.
Light rackets are also an excellent option for players who suffer from arm or shoulder injuries and need a more forgiving racket that puts less strain on their joints.
One of the key benefits of light tennis rackets is their maneuverability. Due to their reduced weight, these rackets are easier to swing and adjust during rallies, making them suitable for players who like to mix up their shots and create different angles.
These units also offer more control and precision than heavier models, as they allow players to place the ball with greater accuracy and finesse. However, they may require more effort to generate power and depth, especially on shots that require a longer swing or a heavier topspin.
- More Maneuverability: They are easy to maneuver, making it easier to hit shots on the run or react to fast serves.
- More Speed: Light rackets are easier to swing, which allows you to generate more racket head speed, giving you more power and spin on your shots.
- More Control: These rackets come with smaller head sizes, which offer more control and precision, making it easier to hit accurate shots.
- Less Power: Light rackets generate less power on contact, making it harder to hit winners and put away volleys.
- Less Stability: They offer less stability and control, making it harder to hit accurate shots and keep the ball in play.
Factors to Consider When Choosing between Heavy and Light Tennis Rackets
Ultimately, the choice between a heavy or light tennis racket depends on your playing style, skill level, and physical condition. Here are some factors to consider when making your decision:
1. Playing Style
If you play a baseline game and rely on power shots, a heavy racket may be the better choice. Conversely, if you play a more defensive game and rely on speed and maneuverability, a light racket may be more suitable.
2. Skill Level
If you are a beginner or intermediate player, a lighter racket may be easier to handle and less tiring to use. However, as you progress in skill level and physical condition, you may want to consider transitioning to a heavier racket to gain more power and control.
3. Physical Condition
If you have weak arm or wrist strength or suffer from injuries, a lighter racket may be the safer and more comfortable choice. However, if you have the strength and conditioning to handle a heavier racket, you may benefit from the additional power and stability.
4. Court Surface
The court surface you play on can also affect your choice of racket weight. For example, if you play on a fast court, a heavier racket may help you generate more power and momentum. Conversely, on a slow court, a lighter racket may help you maneuver more easily.
Frequently Asked Questions
1. How do I know if a racket is too heavy for me?
A racket may be too heavy for you if you feel fatigued or lose control during matches or if you experience pain or discomfort in your arm or shoulder. You can try different weights and balance points to find the right racket for your level and style of play.
2. Can a heavy racket improve my serve?
Yes, a heavy racket can help you generate more power and control on your serve, especially if you have a strong arm and use a continental grip. However, you should also work on your technique and footwork to maximize your serve effectiveness.
3. Is it better to use a heavy or light tennis racket?
It depends on your playing style and preferences. Heavy rackets provide more power and stability, but they require more effort to swing. Light rackets are easier to maneuver and can help you generate more spin and speed, but they may lack control and stability.
4. Are light rackets more suitable for beginners?
Light rackets can be more forgiving and easier to handle for beginners who are still developing their strokes and coordination. However, they may also promote bad habits and limit your potential in the long run. It's important to find a racket that balances comfort, control, and performance for your level and goals.
5. Can I use a hybrid of heavy and light rackets?
Yes, you can customize your racket setup by combining different weights, strings, grips, and dampeners to suit your needs and preferences. For example, you can use a heavy racket for your groundstrokes and a light racket for your volleys, or vice versa. Just make sure you experiment and practice with your new setup before using it in matches.
Choosing the right tennis racket is crucial for players of all levels and styles. The decision between a heavy and a light one ultimately comes down to personal preference and individual playing style.
While a light racket offers more maneuverability and control, a heavy one provides more power and stability on every shot. Players should consider factors such as their swing speed, physical condition, and playing goals when selecting a tennis racket that fits their needs.
Furthermore, it is important to remember that a tennis racket is just one of many factors that contribute to a successful game. Consistent practice, proper technique, and mental focus are also essential components of a winning strategy.
Ultimately, whether you choose a heavy or light racket, the key to success is to find the one that complements your playing style and helps you achieve your goals on the court. By making an informed decision and putting in the hard work, any player can improve their game and take their tennis skills to the next level.
We recently published an article about tennis net height that you should check out if you want to find out more about the universal rules of the game.


text:
Lane Dividers are designed to perform a wide variety of traffic management purposes like indicating lane separation, cycle lanes, parking bays, and tramways. They also mark traffic lanes in car park entrances and exit ramps and protect tunnel walls from possible vehicle impact damage. When used with optional reflective panels, they are ideal for low light areas such as underground passages.
- Flexible – temporary or permanent applications
- Low Maintenance
- For Centre Median or Lane Delineation
- Unique Interlink Design allows segments to work around curves
- Non Slip Textured Surface


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Rapid Voltage Change (RVC)
A rapid voltage change is a fast rise or fall of the RMS voltage. This can be caused by the switching on of a specific load or by a sudden change in source voltage. Sudden source voltage changes can occur in solar grids when the sun is obscured by clouds. Source voltage changes can also occur in wind farms when then wind speed decreases. Load switching can cause a rapid voltage change if the rating of the load is a significant fraction of the fault level of the supply voltage.


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Harvested from the gardens at Monticello, the seeds of this common annual represent the species or wild form of French Marigold as it appears naturally in South America. The plants have a uniquely sprawling habit, are four feet in height, and the single yellow flowers bloom through the summer. Jefferson likely grew both African and French Marigolds at Monticello.
French marigolds are the easiest of flowers to grow. Sow the seeds in a well prepared, sunny site after the last spring frost date, and thin or transplant the seedlings so they are two feet apart. The plants will create a dazzling display until the first frost in the fall.
Approximately 20-25 seeds per pack.


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1 January 2008 Population Genetic Assignment of Confiscated Gopher Tortoises
Tonia S. Schwartz, Stephen A. Karl
Author Affiliations +
Abstract
As gopher tortoises (Gopherus polyphemus) increasingly become threatened throughout their range in Florida, USA, the need for management and conservation will intensify. Here we evaluate the forensic applicability of genetic assignment tests based on microsatellite genotypic data to 1) accurately assign individuals in our genetic database to the sample location or population of origin and 2) determine the origin of 6 confiscated tortoises. Overall, we could correctly assign 90% of the individuals in the database to their population of origin, but we were unable to determine the source of the confiscated tortoises. However, these individuals are unlikely to have come from any of our sampled sites and all 6 may have come from the same population. This approach can be used by law enforcement personnel to identify the origin of confiscated tortoises as well as by developers and wildlife managers to determine the genetic appropriateness of potential recipient populations when it is necessary to relocate individuals.
Tonia S. Schwartz and Stephen A. Karl "Population Genetic Assignment of Confiscated Gopher Tortoises," Journal of Wildlife Management 72(1), 254-259, (1 January 2008). _URL_
Published: 1 January 2008
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CHRISTMAS LECTURES 2010: Mark Miodownik - Why Chocolate Melts and Jet Planes Don't
About this video
Mark Miodownik journeys from little to large in the second of his Christmas Lectures.
As we zoom into the microscopically small realm beneath our fingertips to explore the tiny world we have created inside mobile phones, jet planes and chocolate, curious things start to happen. Gravity becomes less and less important, while stickiness and quantum mechanics start to dominate.
This is the wild west of science, where anything and everything seems possible, but is it? Can we create invisibility cloaks, self-healing phones and super-strong jet planes just by controlling the scale of things? Journey into the inner space of the things around us to find out how the very small affects the very large.
Mark shows that even the taste of chocolate depends on the size of extraordinary crystals which are designed to only melt in your mouth. Moving up in scale he then reveals how sperm whales – one of the world's biggest animals – use a unique material called spermaceti to increase and decrease their body density and adjust their buoyancy.
- Christmas Lecture
- Professor Mark Miodownik
- London, UK
- Filmed in:
- The Theatre
Royal Institution, BBC
- Collections with this video:
- CHRISTMAS LECTURES 2010 - Size Matters
Licence: Courtesy of BBC
Collections containing this video:
From the very large to the very small, discover why size matters.


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The iconic red sandstone used to build the Smithsonian Castle, one of Washington's most recognizable buildings, was quarried by slaves, including some who were once most likely owned by Martha Washington, according to new historical research to be published Thursday.
The discovery by anthropology professor Mark Auslander adds to what has been a years-long reckoning with slavery's role in Washington landmarks, including the Capitol and the White House, and adds nuance to the historical portrait of the Smithsonian Castle, which was built between 1847 and 1855.
Read the entire story at The Washington Post.
Beau Baldwin, who had seen some truly remarkable things on a football field, could hardly believe hiCWU Researchers Working To Restore Salmon Runs In Ellensburg
The settlers who founded Ellensburg in the 1870s were likely drawn by the plentiful water in creeksCWU Dance Team Featured In National Staples TV Commercial
Eight members of the Central Washington University Dance Team are featured in a Staples back-to-scho


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Study wrongly implies LED to blame for van Gogh masterpiece damage
16 January 2013 09.30 GMT
(Netherlands) - Scientists use old LED data to highlight why some yellow colours in Vincent van Gogh's paintings are turning brown due to lighting exposure. Findings sensationalised by mainstream press.
It has been known for some time that the light yellow tones in Vincent van Gogh's paintings are particularly prone to darkening, but now an international team of scientists have produced a report which suggests that the blue bandwidth in lighting could be to blame.
The experiments were apparently carried out using a Xenon lamp high in UV-A, UV-B, and UV-C wavelengths. Unfortunately the research group, which included scientists from the Van Gogh Museum in Amsterdam amongst others, chose to highlight the danger of LED lighting by publishing a spectral distribution chart from a six year old LED system with a particularly high blue bandwidth. The chart is labelled 'Emission spectrum of a typical "white" LED, containing a substantial portion of harmful blue light'.
Even more unfortunately, the report was jumped on by media all over the world printing misleading headlines that LEDs were harmful to van Gogh paintings. Articles quickly appeared in the Daily Mail and The Independent in the UK and the Huffington Post in the USA.
In the report they suggest that all LEDs have a high amount of blue. However, recent developments in museum grade warm white LEDs with high CRI have greatly reduced the amount of blue wavelength present meaning that the bandwidth is now much closer to the black body curve locus.
The paint changes have been blamed on a chemical reduction of chromium, the principle element found in the chrome yellow paint favoured by van Gogh to depict sunshine. However scientists' were left baffled as to the cause of the changes and as to why the darkening was more apparent on some canvases rather than others.
Using synchrotron X-rays to better understand the problem, Deutsches Elektronen-Synchrotron (DESY) in Germany and the European Synchrotron Radiation Facility (ESRF) in France examined an extensive series of van Gogh paintings belonging to three museums in the Netherlands (including the Van Gogh Museum) and France. Speck-sized paint fragments taken from the masterworks were examined at the two synchrotron facilities and two heritage labs in Italy and Holland.
It was concluded that the artist did not always use the same type of chrome yellow paint in his work. Van Gogh liked to use a standard lead chromate paint named 'middle yellow' but also, due to his poverty, utilised a cheaper 'lemon yellow' and 'primrose yellow' from time to time. It was these non regular types of paint that were found to be reactive to light in the lab.
The paints affected, which have been found in Van Gogh's famous 'Vase with Sunflowers' and the 'Portrait of Gauguin', tended to have a higher sulfate content, with the paint becoming unstable the higher the sulphate levels rose. When exposed to green-blue light those paints containing unstable levels of sulfate turned a brownish/yellow, while 'middle yellow' remained unaffected.
Claus Habfast of the European Synchrotron Radiation Facility in France, told the Independent newspaper in London: "LED lights appear to have many advantages but museums should carefully consider that paintings from the Van Gogh era could be affected by them."
Ella Hendriks, Head of Conservation at the Van Gogh Museum in Amsterdam also commented: "Studies like these are very important to make museum curators aware that, even under ambient light conditions, the degradation of some sensitive materials proceeds continuously. Musea should carefully consider the potential impact of, for example, the new, LED-based, lighting systems that are now being installed in collections."
However, Rogier van der Heide of Philips Lighting, who acts as a lighting consultant at the Van Gogh Museum and Rijksmuseum in Amsterdam, states: "The use of LED in museums is safe. It is regrettable that the research was published in such a way. The research was correct but the interpretation was wrong."
Martin Krautter of ERCO, who also manufacture LED lighting for museums, commented: "Paintings using very unstable pigments have to be treated with extreme caution. But to believe that there is a 'less dangerous' light source available for these paintings than modern warm white LED is quite ridiculous. If you want to stop degrading, put the paintings away into the dark!"
There is no evidence that LED light damages artwork across the board. Museums that hold works by Van Gogh and Paul Cezanne, who are known to have used the paint in question, are being asked to consider their use of lighting systems with high blue bandwidths when lighting works by Cezanne or Van Gogh and to check masterpieces with infra-red light for the presence of the paint.


How Old Should Kittens Be When They Are Weaned
Posted on
What Does a Five Week Old Kitten Need? Kitties Newborn
How old should kittens be when they are weaned. Between eight and ten weeks of age, a kitten should be fully weaned and preparing to leave its mother if you plan to find the kitten a new home. The first vaccinations are typically administered at about eight weeks of age, so when the kittens have a vet visit, you can be sure they have been growing appropriately. By six to seven weeks old, they should be able to chew dry food and you'll no longer need to moisten it. Kittens are typically fully weaned by around eight weeks of age. Kittens need large amounts of energy–about two to three times that of an adult cat. Food for your kitten should contain at least 30% protein. Rushed Weaning: Kittens shouldn't be weaned suddenly. Rather, weaning should be a gradual process in which they alternate between nursing and eating cat food, slowly increasing the amount of cat food consumed and decreasing the nursing time until nursing ceases altogether. At 6-8 weeks of age, kittens are not ready to stop nursing.
Kittens should be able to relieve themselves after three weeks of age. If they are growing, gaining weight and seem healthy, things are probably good. Most kitten vaccine protocols start at 6 weeks of age. Let your vet examine them to make sure they are doing well when they get their first vaccine. Usually kittens can be weaned at 4 weeks old and the process is done when they are 8 weeks old. Or, if the kittens can already stand firmly without wobbly, introduction to solid foods can be started. However, based on the newest research which is led by Professor Hannes Lohi from Helsinki University, the weaning process is recommended to be. People often assume that once a kitten is able to eat solid food at around six weeks of age, they are able to be weaned and go to their new homes. However, this is to be discouraged, as the kitten will only just have started to get used to the new status quo, and should not be removed from the dam until they have reached the juvenile, rather.
The kittens are almost fully weaned and continue to play and learn. Being introduced to new people, places in the home, and other pets is an important part of socialization. They are pretty self-sufficient at this point, though Darling, Denby, Corduroy, Tweed, and Wembley still get comfort from mom. Kittens should eat kitten food from the time they are weaned up until they are one year old. Kittens are okay with eating either canned or dry food. The kittens should also have a constant supply of fresh drinking water. If you have gathered all the aforementioned supplies, you can start the process. The weaning process usually continues for about another month until the kittens are fully weaned between eight and 10 weeks of age. During this time, the kittens will still occasionally nurse on their mother but they will also start to eat liquid kitten food. The liquid kitten food should gradually get thicker until it is a watered-down canned kitten food or a moistened kitten kibble.
Kittens must be at least 8 weeks old and fully weaned before they can leave their mothers. If you believe this advertiser is letting their kittens go before 8 weeks of age, please report them to us. Read further information on the minimum age kittens should be before leaving their mothers While this may be true, adopting a kitten before he's old enough to leave his mother and litter mates could result in health issues and behavior problems. Most breeders and legitimate pet stores will only offer kittens for sale as young at 8 weeks, with some waiting until 12 weeks of age. When should kittens be weaned? The weaning process has to start when kittens are approximately four weeks of age, but sometimes it depends on the animal. Some kittens can be weaned when they're 1-month-old, but others have to be weaned at six weeks of age.
Weeks 5-6: The weaning kittens should start to nibble on the kibble, slightly moistened with water. Weeks 6-7: By now, the kitten weaning process is complete, and they should be eating all solid food by week seven. The kittens should be neutered when they're around four months old. If neutering is not carried out by then, you should separate males from females and the queen to prevent in-breeding. Ask your vet if you need help sexing the kittens. Rehoming – Ask your vet when is the right time to rehome the kittens. This will depend on their behavioural. Generally speaking, an 8-week old kitten should weigh between 1.4 and 2.6 pounds. Anything outside that range is a sign that your kitten is either too thin or too obese. Maine Coon kittens, 8 weeks old 8-Week Old Kitten Interaction and Socialization. You can interact with your kitten more freely once they are 8 weeks old.
Weaning refers to the process by which a kitten goes from mother's milk to solid food. The process generally begins when a kitten is around four weeks old and should be complete by eight to ten weeks. Weaning can begin earlier in the case of orphaned or hand-fed kittens. Pet owners should make the transition as easy as possible for kittens. At What Age Should Kittens Be Weaned? The weaning process normally begins when kittens are around four weeks old, and is usually completed when they reach eight to ten weeks. If you are in charge of weaning an orphaned kitten, please remember that weaning should not be attempted at too early of an age. When Can Kittens be Weaned? Experts suggest that you start to wean a kitten at about a month to six weeks old. At that age, they usually will have developed incisors and an appetite for meat. When you offer a kitten meat and she gobbles it up eagerly, that's a clear sign that she is ready to be weaned and start eating regular, solid food, at.
Normally, kittens will need to be weaned once they reach four weeks. Experts suggest that you slowly introduce solid foods into their diets by mixing soft meat with hot water so that it is easily chewed at four weeks. Don't make the mistake of mixing the food with cow's milk—cow's milk is not the same as cat's milk and should not be.
(5) How & what to Feed Kittens 5 7 weeks old YouTube
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Event-Driven Microservices With Spring Boot and ActiveMQ
DZone 's Guide to
Event-Driven Microservices With Spring Boot and ActiveMQ
A guide to using Spring Boot and ActiveMQ for event-driven microservices.
· Microservices Zone ·
Free Resource
Most communications between microservices are either via HTTP request-response APIs or asynchronous messaging. While these two mechanisms are most commonly used, yet they're quite different. It is important to know when to use which mechanism.
Event-driven communication is important when propagating changes across several microservices and their related domain models. This means that when changes occur, we need some way to coordinate changes across the different models. This ensures reliable communication as well as loose coupling between microservices.
There are multiple patterns to achieve event-driven architecture. One of the common and popular patterns is the messaging pattern. It is extremely scalable, flexible, and guarantees delivery of messages. There are several tools that can be used for messaging pattern such as RabbitMQ, ActiveMQ, Apache Kafka and so on.
Messaging Pattern
In this article, we are going to build microservices using Spring Boot and we will set up the ActiveMQ message broker to communicate between microservices asynchronously.
Building Microservices
Let us create two Spring Boot projects ' activemq-sender ' and ' activemq-receiver '. Here is the sample project structure.
 Sample Project Structure
We need to add maven dependency spring-boot-starter-activemq to enable ActiveMQ. Here is a sample pom.xml.
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="_URL_
 xmlns:xsi="_URL_
 xsi:schemaLocation="_URL_ _URL_
 <modelVersion>4.0.0</modelVersion>
 <groupId>com.techshard.activemqsender</groupId>
 <artifactId>activemq-sender</artifactId>
 <version>1.0-SNAPSHOT</version>
 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.1.6.RELEASE</version>
 <relativePath />
 </parent>
 <properties>
 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 </properties>
 <dependencies>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-activemq</artifactId>
 </dependency>
 </dependencies>
</project>
Configuring Publisher
In the project activemq-sender, we will first configure a queue. Create a JmsConfig class as follows.
package com.techshard.activemq.configuration;
import org.apache.activemq.command.ActiveMQQueue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jms.annotation.EnableJms;
import javax.jms.Queue;
@Configuration
public class JmsConfig {
 @Bean
 public Queue queue(){
 return new ActiveMQQueue("test-queue");
 }
}
The above class just declares a bean Queue and our queue name would be test-queue. Note: queue names can also be read from application properties. This is just an example.
Now, let's create a REST API which will be used to publish the message to the queue.
package com.techshard.activemq.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.jms.Queue;
@RestController
@RequestMapping("/api")
public class MessageController {
 @Autowired
 private Queue queue;
 @Autowired
 private JmsTemplate jmsTemplate;
 @GetMapping("message/{message}")
 public ResponseEntity<String> publish(@PathVariable("message") final String message){
 jmsTemplate.convertAndSend(queue, message);
 return new ResponseEntity(message, HttpStatus.OK);
 }
}
In the controller, we will inject the bean Queue which we declared before and we will also inject JmsTemplate.
To send or receive messages through JMS, we need to establish a connection to the JMS provider and obtain a session. JmsTemplate is a helper class that simplifies sending and receiving of messages through JMS and gets rid of boilerplate code.
We have now created a simple API endpoint that will accept a string as a parameter and puts it in the queue.
Configuring Consumer
In the project activemq-receiver, create a component class as follows:
package com.techshard.activemq.consumer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.jms.annotation.EnableJms;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;
@Component
@EnableJms
public class MessageConsumer {
 private final Logger logger = LoggerFactory.getLogger(MessageConsumer.class);
 @JmsListener(destination = "test-queue")
 public void listener(String message){
 logger.info("Message received {} ", message);
 }
}
In this class, we have an annotated method with @JmsListenerand we have passed the queue name test-queue which we configured in the publisher. @JmsListener is used for listening to any messages that are put on the queue test-queue.
Notice that we have an annotated class with @EnableJms. As Spring documentation says @EnableJms enables detection of JmsListener annotations on any Spring-managed bean in the container."
The interesting point here is that Spring Boot detects the methods even without @EnableJms annotation. This issue has been reported on Stackoverflow.
Creating Spring Boot Applications
In both the projects, create an "Application" class annotated with @SpringBootApplication as below.
package com.techshard.activemq;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
@SpringBootApplication
public class Application extends SpringBootServletInitializer {
 public static void main(String[] args) {
 SpringApplication.run(Application.class, args);
 }
}
Installing ActiveMQ
I have installed ActiveMQ by downloading here. We can also use Spring Boot's embedded ActiveMQ for testing purposes. Once you have installed, the ActiveMQ server should be available at http://localhost:8161/admin and we will see the following welcome page.
 ActiveMQ Home Page
Configuring ActiveMQ
In both the projects, create application.properties file and add the following properties.
spring.activemq.broker-url=tcp://localhost:61616
spring.activemq.user=admin
spring.activemq.password=admin
ActiveMQ supports multiple protocols to connect to the message broker. In this example, we will be using the OpenWire protocol.
That's it!
Testing ActiveMQ
Before running the applications, make sure to change the server port for one of the projects. The embedded tomcat server runs on the port 8080 by default.
Run both the applications and run the URL http://localhost:8080/api/message/Welcome to ActiveMQ! in browser or any REST API testing tool.
In the consumer application, we will see the following log in console


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Lovely DIY birds in soft pastel shades
Delicate, fine and elegant-looking.
Are these pretty birds made out of ceramic or porcelain?
They may look like they are, but these small feathered friends are actually made out of FIMOair light. You too can make them – no oven required. Delightful decorations for your home.
To make one bird, begin by rolling six plastic bread bags up to a ball. Place this ball inside another bag and seal the outer bag at the top with masking tape.
For each bird, knead approx. 200g FIMOair light clay well, shape to a ball, flatten and press around the plastic ball. The opening of the bag sticks out underneath and can be stuck into the narrow opening of your vessel for the next steps.
This keeps the bird more stable while you work on it and the indent made by the rim of the glass clearly marks the round opening required later.
Smooth over the modelling clay. You may want to moisten your fingers with a little water first. Now create a small head with a pointed beak. Shape the rear end of the bird to point upwards and taper slightly.
Make five small balls for the ‚tail feathers', place them in position and smooth them out towards the end. Use the remaining FIMOair light to form two flat basic wing shapes with four or five long points.
Moisten their backs slightly, add the wings to the left and right of the body and press on gently. Smooth over the edges well.
Use a pointed modelling tool or kitchen knife to add a feather-like pattern to the wings.
Then curl the tips of the wings a little. Create the eyes using a round modelling tool (or skewer).
Leave the bird to dry for one day (24 hours).
Tip: Unfinished items and left-over bits of material can be stored in a sealed plastic bag or airtight container, e.g. a plastic box or jar.
Next, remove the bird from the supporting vessel. Cut into the modelling clay along the round indented edge taking care not to cut the bag. Remove the clay inside the circle so that you are left with an opening at the base of the bird. You can now see the taped-up plastic ball. Remove the masking tape from the outer bag.
Open the bag and pull out the plastic inside. Then free the outer bag and pull it out too. Allow the bird to dry again (inside). Sand over the surface of the bird using fine-grained sandpaper. Paint the bird either all over or just in places by dabbing acrylic paint on using an almost dry large-pored sponge.
Add dark paint to the eye sockets using a fine brush. After the paint has completely dried, cover the bird with several coats of gloss varnish.
These adorable birds can also be used as letter carriers: Cut a small slit across the beak of the hardened bird using a kitchen knife.
Place a mini envelope between the two halves of the beak. The envelope could contain a personal greeting or message. The birds also make attractive table decorations – simply use the envelopes as place cards.
What you need
7 plastic bread bags, masking tape (removable adhesive tape), vessel with narrow opening, e.g. a glass, acrylic paint in light pink or light blue, sponge for dabbing on paint, fine brush for the eyes, brush for varnishing
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This rare wooden club came from the Thames foreshore at World's End, Chelsea. It was found in 1996. It has been scientifically dated to 3600-3300 bc. The club is currently on display in the Museum of London's London before London gallery which tells the vast story of London prior to the coming of the Romans.
Weapons in the wet
The club is made of alder wood. It is roughly the size of a modern cricket or baseball bat. It would have been a formidable weapon. It was lost at the river's edge at a time when climatic changes were causing sea and river levels to rise. It owes its survival to the waterlogged conditions in which it lay.
Many other ancient objects have been found in the river in the Chelsea area. Some may have been deliberately placed there as gifts to the gods or to tribal ancestors.
Museum number 99.119