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If you choose not to rely on electronic communication, thats great. But for those of us who do, isn't it time we set up community run alternatives?
Gradually, the internet, which once seemed like a relatively free and user-controlled system – at least compared with totally centralised TV/radio broadcasting, is becoming a controlled commercial space where people don't trust each other and we are constantly under the eyes of authorities and businesses - much like our city centres.
During the uprising in Egypt 2011 there was an internet blackout, making it clear that such a communication network is valuable for organising social change but sadly rests in the hands of companies willing to cooperate with the authorities. Since then the US has began to develop an 'internet kill switch'. See the US Open congress bill 'Protecting Cyberspace as a National Asset' and indymedia article Internet Freedom Fighters Build a Shadow Web
In order for a community run network to become popular, it might be useful to have some universal standards, and a way for different networks to link together. A small group might use high frequencies to get high bandwidth communication locally, but how can we connect that communication with lower frequency, longer range links to other communities? If we are going to set up some sort of repeaters or base stations to link groups, they need to be useful to everyone, and not dependent on other parts of the network. Some repeaters might be installed in vehicles or boats that move around. Or they might be dependent or wind or sun for power – so they cannot be always relied upon.
It is relevant here to question what is important to us in a communication network. Simply spending time with and talking to people around you is a very useful way to communicate. Any kind of centralisation or broadcasting of information could be argued to be detrimental to the autonomy of individuals and communities. when we look at examples in 'nature' we can see that beautiful organised structures come about as the result of a large number of low level interactions.
make food and fire, people come together and communicate. actually it seems that the more communications technology we have, the less we do this. a lot of people feel really isolated, even though they have worldwide communication devices.
Language is an important communication tool. Like other aspects of our culture, it is becoming more homogenised and less diverse. There are many examples of when a common language has been used as a way for a minority to have power over many, and of when speakers of other languages or dialects are oppressed. Language homogeny is a structure used to create a national identity and recognition of and obedience to a national state. Many revolts and uprisings have been possible because of a refusal to use the majority language. In recent times, the globalisation of the market and of communications infrastructure (for example the internet) mean even more homogeny of language, allowing even more centralisation of control by a minorty. Of course, using a common language improves relations between communities, but when this is forced or imposed my a minority there will always be some kind of communication breakdown, a loss of some culture, ideas or knowledge, and somebody will be more isolated. Thats not to say we should not learn popular languages and use them to network with far away friends, but that we must recognise that divirsity of language is important in maintaining decentralised social control.
Stories, tales and songs are a way to memorise ideas so they can be passed between groups and between generations.
Write a letter, and give it to someone who is travelling the direction you want it to go. Like all communication systems, the provision of a postal service has often been a way to exert control.
A simple way to communicate in a group is to leave a written or pictorial message for others to see. A way of making it weatherproof is usually needed.
Some would argue that the invention of the printing press, meaning that information could be mass produced, was a hindrence to our diversity of ideas. There are no doubt problems brought about by any kind of mechanism which allows a minority to speak to the masses. But of course they can also be very important and empowering community tools.
The radio spectrum, like other kinds of space, has been divided into discrete parts of which the majority is resverved for authorities, military, or companies who will sell it back to us to use. To use it in a genuinely decentralised way we might need to disrespect the idea of bandwidth ownership.
'amateur' radio communication has existed for over a hundred years. It is both a local and an international network and has often been relied upon when other communications have broken down because of disasters such as floods. Data modulation systems such as PSK31 can allow text services similar to email or sms, which can operate over thousands of miles on HF. Using the amateur bands requires a lisence and an official 'callsign', which are relatively cheap and easy to get, but there are some undesirable restrictions. For example, sending encrypted messages is forbidden, and the lisencing association stores personal details of its users and will cooperate with governments. Of course we could use similar systems illegally, but as an existing nework it has the advantage of having estabilished and well documented international standards, as well as infrastructure such as repeater stations. The amateur community emphasises learning and experimentation rather than a practical everyday communication tool.
A simple solution can be to use low cost UHF transmitters/recievers with RTTY. There are some very cheap transmitters sold on ebay, some sold for use with arduino or raspberry pi (see issue 8 of magpi magazine). The problem is that the cheaper ones do not support channel selection, so would interfere with each other.
Pirate radio can be empowering for a community and is a useful tool for combining art and information. The advantage is that the recievers are cheap and can be found everywhere. Compared to wifi networks it is much more practical for recieving in more wild places, fields, gardens, workshops, meaning we can be doing practical things and not stuck indoors, while recieving information. Of course there are legal problems with broadcasting without a lisence, especially if it is done in the city. But using it in isolated rural areas is something that can definately be experimented with. As anyone with an FM radio can listen, it can be a good way to make links with other people who live nearby.
However, we must not forget that the nature of broadcast is that it remains a one-to-many 'shut up and listen' monologue, traditionally used as an oppressive political tood, and care must be taken that it remains a project that everyone can participate in.
FM systems will usually use a 1 or 2w 'exciter' to produce the modulated signal and then an RF amplifier. Many modern systems, especially the cheaper/lower power ones have the exciter and amplifier all in one box or even all on one board. 'HLLY' and similar Chinese brands are like this and are very cheap and simple to use. However they are not very high quality and not suitable for high power transmissions (more than say 60w). Also the more power you are using, the better antenna you need to not damage the transmitter. Most transmitters have a built in SWR (standing wave ratio) meter to give an indication of how well the antenna is functioning and will normally switch off automatically if a dangerously high amount of power is coming back from the antenna. Some transmitters will need an external SWR meter.
Most low power FM transmitters run on 12v DC so are perfect for running from batteries. If you want to run from the mains electricity and dont have a transformer, computer power supplies work quite well. If they are modern ATX ones, you will need to connect the green wire on the motherboard connector to a black wire to switch it on. Then on each block of 4 wires you have yellow and black wires to give 12vDC and red and black to give 5vDC.
Many pirate radio stations use a 'bridge' to link the studio to a remote transmitter. This is done either for security reasons (not wanting to get caught at the site of the transmitter) or simply to keep the transmitter close to the antenna when the antenna is in a difficult to reach spot (remember, the hieght of the antenna greatly effects the range). A bridge which gives a lot of range allows you to be very creative with antenna locations, as the transmitter could be powered by a small solar panel and battery and put in a very difficult to reach place. This 'bridge' can be made in various different ways:
FMA200 tunable 5/8 wavelength antenna. Is quite a good commercially available antenna for FM.
freie-radios.net - audio portal of community radios. Over 25,000 recordings
For making antennas its important to know the wavelength.
wavelength(lamda) = c / frequency c = speed of light = 299,792,458 m/s or just use c = 3 * 10 ^ 8 so if we use working with frequency in MHz we can use c = 300m/s so wavelength = 300 / frequency in MHz so 100mhz = 3m wavelength
Many pirate radio stations operate on FM. But there are also AM stations covering larger areas, and there is an international shortwave pirate radio scene.
The projects in this section generally require already having some internet connectivity rather than building from scratch. But they aim to be more distributed and many work well together with community wireless networks described below.
But the methods of finding torrents have traditionally involved using centralised torrent hosting sites and trackers. This has changed somewhat since the distributed hash table was introduces with BEP 5, meaning only a magnet link containing a hash of the torrents content was needed, and peers could be found without the need for a centralised tracker. But the magnet links themselves still needed to be hosted somewhere.
A project called tribler solved this problem to some extent, providing a peer-to-peer search mechanism, but it only works between tribler's user community, which is tiny in comparison to all users on the bittorrent network.
Magnetico is a program which scrapes torrent data off the DHT to build your own torrent database and could just be the final piece in the puzzle.
See also the filesharing section
Dat is a decentralised storage tool inspired by bittorrent, but with built in version control. Dat has similarities with IPFS, however Dat archives are addressed by public key and can be updated whereas IPFS (at least in early implementations) addresses static content.
The 'inter-planetary filesystem'. A decentralised, peer-to-peer protocol, designed to be an alternative to HTTP (and potentially many other internet protocols). It is a content addressable filesystem, meaning files are referred to by their content (using a hash) rather than their location. The nearest available copy of the file is retrieved, increasing speed and efficiency and removing the power dynamic of a centralised server-client relationship. IPFS seeks to be a more permanent data store than the web where old sites can get lost forever.
Secure Scuttlebutt (SSB) is a peer to peer platform designed for social networks.
Noteworthy applications on SSB include: (Complete list)
SSB references and media articles: - The Scuttlebutt Protocol guide a detailed description of the protocol - Scalable Secure Scuttlebutt draft article on scaling SSB - Andre Staltz's classic article 'An Off-grid Social Network' - 'The Atlantic' article 'Meet the nomad who's been exploding the internet into pieces'
Some work-in-progress implementations of SSB in other languages:
Due to the need to continually process multiple feeds, SSB applications tend to make heavy use of streams. A custom system of pipeable streams has been developed which is particularly suited to processing SSB feeds.
Contrary to content-addressed systems like Bittorrent, IPFS or DAT, SSB is structured around propagating 'feeds', collections of messages from particular peers, based on the relationships between peers. As such, a particular piece of data is not either 'on SSB' or 'not on SSB', rather the data held by each peer depends on their relationships with other peers. The network topology is determined by social topology.
Many other peer to peer systems use a distributed hash table (DHT) to index and propagate data whereas SSB uses a gossip protocol. With a DHT, all users have, in principle, access to a ubiquitous data-set, and their connectivity with particular peers effects only how long it might take to find a particular piece of information (of course in practice some data often cannot be retrieved). In that sense they essentially emulate the behavior of a centralized system, where all users access the same source of data. By using a gossip protocol, the data-set itself is dependent on the relationships between peers. In the case of SSB, the user explicitly chooses which peers they want to relate to, and by doing so retrieves messages from those users' 'feeds', regardless of their content, and stores them allowing them to propagate to other peers requesting messages from that particular user. It has a relationship-centered topology.
There is much discussion about the optimal parameters for 'gossiping'. Notably, the 'number of hops', the extent to which a user holds data from indirectly related peers ('friends of friends', or 'friends of friends of friends'). This can be individually adjusted using client software and might vary depending on the use-case, the resources available and the attitude of the user.
Of course, SSB is not without its limitations. IP addresses are exposed by default. There are ways around this, but it is important to note that it is not anonymous out of the box. That said, the handshake mechanism used has some promising security properties. It is impossible to connect to a peer without knowing their public key, and peers have control over who they allow connections with. Passive eavesdroppers exposed to the handshake are unable to determine the public key of either peer.
SSB is also not well suited to handling large files and data sets. Messages in SSB feeds are limited to 8kb, and larger amounts of data such as images and other media are handled by a distinct sub-protocol called SSB-blobs. However, SSB-blobs is also not designed for particularly large data sets (by default, 'blobs' are limited to 5MB).
VPNs consist of tunnels which aim to emulate being on a private local area network when in fact the connections span a wider network such as the internet.
Many companies use VPNs to create a secure private network without needing to have their own cable or radio connections between buildings. They are also commonly used to give privacy and anonymity online, and there are many providers offering internet access over VPN for this purpose. VPN tunnels can also be used to create alternative networks or used together with some of the other platforms listed here.
Tinc is a protocol for virtual private networks without a server-client architecture, and some routing features that make it suitable for creating peer-to-peer networks.
Using wifi for outdoor links is gaining more and more popularity. As the 2.4ghz band becomes crowded in densly populated area, more projects are begining to use the 5Ghz and 10Ghz bands as well.
althea mesh project where you pay peers to share connection
FON - commercially provided cooperative wifi sharing (but you need an internet connection to join)
guifi.net is based mainly around catalunya/valencia, and with over 20,000 operational nodes, it claims to be the biggest wireless network community in the world.
Each local guifi.net group organises between themselves financially - antennas can be bought be individual users, but often it is useful to put together some money for more expensive longer distance 'supernodes' and for times when nodes would need to be replaced, for example after being struck by lightening.
Many local guifi.net groups have successfully persuaded local government to share their internet connections, for example from libraries or offices, by allowing the group to install an antenna at the site linking it to the guifi network.
Guifi.net is backed by a 'foundation' officially registered as an operator with the Spanish Telecommunications Market Commision. Anyone (as long as they abide by guifi.net's code of practice) can use the name, and take advantage of being recogised as a foundation. For example, the inhabitants of two towns might organise together to lay fibre between the towns, and use guifi.net's foundation status to get permission from local governement.
They also have a good advocat and rely on european law to settle disputes about the legality of the project.
They use a private address space 10.xxx, ips are allocated by their website. and there are dns servers to resolve these local ips. The network is primarily used for providing interenet access, but off-internet services (ftp, etc) also exist and are quite popular.
Many guifi.net groups use mikrotik routers, and some use ubiquity.
Freifunk is an international Project for free wireless networks and frequencies (Open Spectrum). Originating in germany, there are many community wireless mesh networks operating under the name 'freifunk'. The freifunk firmware is a modified version of OpenWRT designed for mesh networks. In Germany, there are legal problems with offering unlocked wifi internet access because of the oppressive regulations about filesharing and their implications for the interenet account holder (Störerhaftung). Many freifunk projects now use Virtual Private Networks to re-route network traffic to get are this problem. This highlights a problems with the regulation of the internet by governments, and another way to get around it could be to begin to use off-intenet projects and services.
funkfeuer.at is a free mesh network project based in austria, using OLSR routing protocol. It is a radio network, also using internet VPN tunnels to link 'radio islands' (nodes not accessible by radio).
Some commercial manufacturers of wifi equipment are
Optical links can give very high bandwidth but must be exactly pointed at each other.
A standard for WRAN (wireless regional area networks), IEEE 802.22 has recently been developed, which will use 'white spaces' in the VHF and UHF bands, previously used by analogue TV broadcasting. The standard is likely to be used by commercial internet service providers to cover rural areas - internet base stations could operate over a 60km radius, like TV transmitters. It is the first international standard to use 'cognitive radio' to eliminate interference with existing TV signals. This makes it possible that transmission equipment will be software defined, making it more adaptable for eventually being re-used by us.
Software Defined Radio devices could be very useful in establishing a community run network. They are computer controlled radios, where various aspects of the radio's operation which traditionally were done by analogue hardware devices, in paticular the modulation and demodulation of the RF signal, are done digitally by software. This has only recently become posibile because with radio frequency high sampling rates are required and computers need to run fast enough to demodulate them in real time. The advantage is that software defined radio devices are flexible, adaptable and easy to modify. By changing the software, a single device could act as an FM transmitter, GPS reciever, digital TV decoder, VHF tranciever, whatever... Of course some hardware changes (such as amplifiers or antennas) are required, but essentially it is software which defines the behaviour as a radio device.
This means that new radio protocols could be established without the need for new hardware. But that is only the beginning. It allows more dynamic, more flexible use of the radio spectrum. When there is little radio traffic (in unpopular places or at unpopular times) we can use more bandwith, reacting dynamically to interference. When connectivity is good we can increase frequency and decrease power consumption. When powered by solar or wind, we can dynamically adjust frequency or RF power depending on the power available.
Making devices more flexible by increasing the extent to which they are controlled by software is good because when the device is no longer needed it can be used for something else instead of being thrown away. Multi-perpose programmable devices, such as the arduino or raspberry pi, are good examples of hardware which will never become redundant. Software defined radio is likely to gain popularity in the coming years, which is interesting for us because it is easy to modify for different perposes. So when this technology becomes widespread and easy to find for free, we could modify commercial devices to work with our own set of standards – and if we change those standards at some point we will not need to get new equipment.
The USRP has been used in projects to decode GSM mobile phone signals. It is also used in a project to create easy to build GSM base stations using OpenBTS. A free mobile network using the USRP running OpenBTS (with some RF amplifiers) and powered by wind has been set up at Burning man festival for several years (But with an official lisence). Of course if an unlisenced GSM network was to get popular, we would be likely to have problems with the authorities very quickly. But the advantage is that individual users need only a mobile phone – and thousands of them are being thrown away.
More recently, low cost SDR receivers have become popular, as it was realised that SDR digital TV recievers (such as the NooElec TV28T)can be used in a very flexible way - recieving 25MHz to 1.7GHz, usually with a 1mhz bandwidth, meaning they can be also be used as a spectrum analyser to look at 1mhz at a time. An antenna design known as a discone is good for omnidirectional wideband applications making it good for SDR projects.
There seems to be a number of reasons why Software defined radio could be useful for community run communication systems. It could allow us to create something genuinely independent of existing commerically provided systems, whilst being able to re-use redundant hardware from these systems. Changes can be made to the standards of how the system works without requiring any new hardware – saving resources. Frequencies can be dynamically allocated, allowing different types of hardware to work together and interference with other systems to be avoided automatically. Software projects are also easier to work on collaboratively than hardware, meaning they will be constantly optimised and adapted.
Orthogonal frequency-division multiplexing is the modulation system used by ADSL, Wifi, and DAB digital radio. Multiple carriers are used, and the idea is that sub carrier frequencies are chosen that are 'orthogonal' to each other, which means they do not interfere with each other. Interestingly it is used even on HF (below 30Mhz) as used by the new international broadcast system 'digital radio mondiale'. It allows for a better signal in less bandwith compared to standard AM modulation.
Decentralised community run systems will, by their nature, encourage people locally to interact, as information spreads geographically. If you are searching for something or announcing that you have something to offer, it will be naturally easier to find responses nearby. Compared to the internet, it will be more chaotic, but in a beautiful self-organising way. Text/images/music/whatever will spread geographically and and be able to discover the same stuff as others nearby but it will change all the time as ideas/art spread between groups like a roumour, like fairytails.
But aren't you gonna spend forever setting all this stuff up while your plants need weeding and watering and you ignore the people around you.....
continue to 430mhz data transfer


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10 Channel Verifier is a hand held wireless portable notification unit that notifies you when a sensor connected to your OB-4 Security System has been activated or triggered.
The Verifier illuminates the corresponding LED light of the activated sensor letting you know which sensor has been triggered. Up to 10 sensors can be monitored with the Verifier.
The 10 Channel Verifier is portable, battery operated, and can be easily carried in your pocket when on the go.
- LED light
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Starry Internet is among the next generation of new wireless technologies that support high-speed, low-latency internet connectivity using millimeter-wave bands capable of sending large amounts of data over short distances. That sounds a lot like 5G, and I’d say it’s definitely similar — but Starry doesn’t quite bill itself as a. Why not? Whereas 5G focuses on mobile, roaming access to the internet, Starry’s technology is focused solely on establishing a fixed, targeted connection to your home.
What’s the difference? Mobile wireless carriers like T-Mobile and Verizon send signals in virtually all directions


Every year we read about predictions for technology trends, and everyone seeks to understand where to invest energy and money to capitalize on opportunities. While no one has the absolute pulse on the trends more likely to gain traction this year, having spoken to 400+ CEOs and CTOs of emerging tech companies as the ex-Producer and Host of a top-rated tech podcast, the trends point to the possibility for these five areas of tech to make progress in 2023 and beyond. So, what are some of the trends to keep an eye on?
Growing Tech Trends
Artificial Intelligence and Machine Learning
AI and ML are expected to continue to be integrated into a wide range of industries, from healthcare to finance to retail, to improve efficiency and productivity.
AI and ML have the potential to automate repetitive tasks, analyze large amounts of data, and make predictions, which can lead to cost savings and improved efficiency in a wide range of industries. They also can learn and improve over time, which makes them well-suited for applications such as image and speech recognition, natural language processing, and predictive maintenance.
Some of the key companies leading the way in AI and ML include Google, Facebook, Amazon, Microsoft, and IBM. These companies have invested heavily in research and development in these areas and have released several products and services that utilize AI and ML, such as Google’s TensorFlow and Amazon’s SageMaker.
5G and Edge Computing
The deployment of 5G networks and the growth of edge computing are expected to drive innovation in areas such as the Internet of Things (IoT), autonomous vehicles, and smart cities.
5G networks offer faster speeds and lower latency than previous generations of cellular networks, which will enable new use cases such as autonomous vehicles, smart cities, and high-definition video streaming. Edge computing, which involves processing data closer to the source rather than in a centralized location, will be necessary to support these new use cases and handle the large amounts of data generated by IoT devices.
Companies that are leading the way in 5G and edge computing include telecommunications companies such as Huawei, Ericsson, and Nokia, as well as technology companies such as Qualcomm and Intel. These companies are involved in the development and deployment of 5G networks and edge computing infrastructure.
Quantum computing has the potential to solve problems that are currently intractable for classical computers and is expected to see significant progress in the coming years.
Quantum computers use the principles of quantum mechanics to perform calculations that are not possible on classical computers. They have the potential to solve problems that are intractable for classical computers, such as simulating complex systems, breaking encryption, and optimizing logistics.
Some key companies in the field of quantum computing include IBM, Google, Microsoft, Alibaba, Intel, and Rigetti. They are working on developing different types of quantum computers such as superconducting qubits, trapped ions, and topological qubits. They are also working on the development of software and algorithms to run on these quantum computers.
With the increasing reliance on technology in all aspects of life, cybersecurity will continue to be a top concern for individuals, businesses, and governments.
With the increasing amount of personal and business data stored and transmitted online, cybersecurity has become a critical concern. Cyber-attacks are becoming more sophisticated and frequent, and the increasing use of connected devices, cloud computing and 5G networks increase the attack surface. New technologies and techniques will be needed to protect against these threats.
Companies that are leading the way in cybersecurity include Symantec, McAfee, Check Point, Fortinet, and FireEye. These companies provide a wide range of cybersecurity products and services, such as antivirus software, firewalls, and intrusion detection systems.
Virtual and Augmented Reality
VR and AR technology is expected to continue to improve and become more widely adopted, with potential applications in gaming, education, and industry.
VR and AR technology have the potential to change the way we interact with computers and the world around us. VR can be used to create immersive experiences in gaming, education, and industry, while AR can be used to overlay digital information on the real world, which can be useful in fields such as manufacturing, maintenance, and training. As the technology continues to improve, it’s expected to become more widely adopted and accessible.
Companies that are leading the way in VR and AR include Oculus (owned by Facebook), HTC, Sony, Microsoft, and Magic Leap. These companies have developed a variety of VR and AR products, such as headsets, controllers, and software development kits, and have also invested in research and development in these areas.
The companies that are currently at the forefront of these technology are constantly evolving and new players can emerge quickly. In fact, many smaller companies are also making significant contributions in these areas and are worth keeping an eye on.
Here are a few examples of smaller companies that are worth keeping an eye on:
In the AI space, companies like Nutonomy (now owned by Delphi Automotive) and Persado are working on developing advanced autonomous driving and natural language generation technology.
For 5G and edge computing, companies like Pivotal Commware and Mavenir are working on developing new infrastructure and technologies to support 5G networks and edge computing.
In the field of quantum computing, companies like IonQ, Xanadu, and Cambridge Quantum Computing are working on developing new types of quantum computers and software.
In cybersecurity, companies like Darktrace, Cylance, and Cybereason are working on developing new approaches to threat detection and response.
In the VR/AR space, companies like Dreamscape Immersive, 8i, and InContext Solutions are working on developing new VR and AR experiences for entertainment and industry.
In conclusion, 2023 is expected to see significant advancements in various areas of technology such as Artificial Intelligence and Machine Learning, 5G and Edge Computing, Quantum Computing, Cybersecurity and Virtual and Augmented Reality.
These technologies have the potential to transform a wide range of industries and improve efficiency, productivity, and the way we interact with the world. While some of the key players in these areas are major companies like Google, Facebook, Amazon, IBM, Qualcomm and Intel, there are also many smaller companies making significant contributions and worth keeping an eye on.
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Friday, 12 February 2016
History of Launch of Artificial Satellites in the DPRK
The history that the Democratic People’s Republic of Korea started to manufacture and launch artificial satellites by itself is not so long.
In August Juche 87(1998) the DPRK launched successfully the first artificial satellite Kwangmyongsong-1.
11 years later since then, in April Juche 98(2009) Kwangmyongsong-2 was launched successfully for the second time.
Kwangmyongsong-1 and Kwangmyongsong-2 were test satellites.
The DPRK acceded to international space treaties including the Outer Space Treaty in order to increase the international trust and strengthen the cooperation in the peaceful space scientific research and the satellite launching domain.
The DPRK launched successfully the first applications satellite Kwangmyongsong 3-2.
The first applications satellite Kwangmyongsong 3-2 is an earth observation satellite which goes round the polar orbit.
On February 7, Juche 105(2016), an earth observation satellite Kwangmyongsong-4 was launched successfully in the DPRK again.
Kwangmyongsong-4 is an applications satellite which goes round the polar orbit too.
Therefore the DPRK demonstrated grandeur of the manufacturing and launching country of artificial satellite to the whole world again.
In the future the DPRK will conquer space and make an active contribution to its economic construction and improvement of the people’s living by legitimately exercising the right to use space for peaceful purpose.


Why Video Conferencing Is a Must-Have Tech Solution Nowadays?
The global pandemia forced businesses to become more flexible to present-day reality. One of the aspects of good market performance and corporate communications is remote meetings...
Almost every sphere of our today’s life requires remote meetings and conversations because of the global pandemic situation. COVID-19 has already transformed our world and brought conference rooms and video calls as the must-have attribute of business relationships, education, and healthcare routines. People meet remotely to discuss some work moments, to study, to get consulting, and for other purposes.
That is why the first benefit of video conferences in nowadays reality is the simplicity of remote interaction. With the help of AV software and hardware, it is possible to initiate a video call or arrange a virtual meeting with people located in any corner of our world. But businesses can benefit from video conference rooms at any time, even when the global pandemic comes to an end.
Besides the above-mentioned benefits, it is worth mentioning other important advantages of video conferencing for business. For example, video conference rooms enable the digital workforce. It means that appropriate video conferencing software ensures improved meeting culture irrespective of the location of the attendees. Other key benefits are:
KDInfotech understands that video conferencing is a really important solution for COVID-19 reality. That is why the dedicated team of specialists implement audio-visual algorithms and set up improved conference rooms for video calls that meet all the business purposes. KDInfotech experts are working both on hardware and software solutions that are suitable for any type of business. This way the modern entrepreneurs are able to use different video conferencing apps within one fully-customized IT infrastructure or a scalable system.
As an example, we can take a closer look at the companies that use Zoom for team meetings and inner conferences. At the same time, this firm can cooperate with a partner that uses Google Hangouts for video conferences and video calls. KDInfotech offers hardware and software solutions that will allow users to open up individual applications in their conference rooms.


It turns out anyone with basic T-Mobile’s t-zones WAP service can connect via GPRS to the internet. There are a few different T-Zones plans, but the basic T-Zones service included with the family plan I am on works fine. There are many benefits to connecting via GRPS: the phone is available for voice communication while connected, there are no charges for the amount of bandwidth used or even for the time you’re connected, and it’s faster than the 9,600 bps limit of CSD connections.
For me to connect successfully, I first changed the GPRS access point on my phone to wap.voicestream.com. After having done so, I connected the phone at my laptop running Windows XP via IR. Then, it’s a one-time matter of setting up a “dial-up” connection that will tell the phone to connect. To accomplish this, I created a connection that dials *99#, with a blank username and password, and all other settings left at the default. Once this connection is setup, I just “dial” when my phone is linked to the computer, and a GPRS connection of 115.2 Kbps is established immediately with T-Mobile.
Unfortunately, connecting via the free T-Zones plan has a few additional drawbacks. The free connection through wap.voicestream.com gives you access to only a few ports. Only ports 25 (SMTP), 80 (HTTP), 110 (POP3), 143 (IMAP), 993 (IMAP, SSL) and 995 (POP3, SSL) are accessible. With the for-a-fee data services T-Mobile offers, this problem is resolved. Fortunately, for my use — web browsing, sending and receiving mail — this doesn’t pose a problem.
Update (4/15/04): It appears all ports are open. I do not know how long this has been in effect, but I’ve just been able to use ports 22, 3389, and 2065 successfully, therefore I’m assuming the port access limitations have been removed — at least on my account.
Also, after using the connection for a while, I noticed the actual connection speed, while reported as 115.2 Kbps, has a real-world speed of around that of a 56 Kbps modem (34-45 Kbps).
Thanks to T-Mobile for offering this free service!


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Through the analysis of the traditional computer system integration, it is concluded that the traditional computer system integration has been unable to meet the demand of the market, must explore the new trend of computer system integration, in this paper, the development trend of the computer system integration has carried on the related discussion. With the continuous development of modern society, all walks of life are also the need of modernization. A growing number of unit is an urgent need to establish an advanced computer information system. Due to the different unit has its own unique characteristics. Therefore, we need to computer system of the myriad changes. Medical units from the system of government management system, from the factory production management system, the securities market management system. Between different systems are various. System integration application of functional integration, network integration, integrated technology such as software interface integration means, is the overall planning of guidance information system, gradually achieve a kind of method and strategy. System integration is a kind of thought, concept, philosophy, it not only includes technology integration, more cannot lack art component integration.
1, the characteristics of the computer system integration
1.1 the computer system integration related knowledge
System integration based on integrated structured cabling system and computer network technology, will be independent and separate equipment, function, information integration to about a certain correlation between each other, but in the new system of harmonious and unified, can fully Shared resources, in order to achieve high efficiency, centralized and convenient management strategy.
System integration is a need to multiple vendors, all kinds of application system structure of multi-protocol, therefore, to realize system integration is the key to solve the problem of the interoperability of different systems to connect, dedicated to solve all kinds of separation equipment, the interfaces between subsystems, protocol, system platform, application, and system, organization and management, building environment, construction personnel, all of the required integration problems. For the optimization design of the system integration is the essence of the system, for a large computer network integration system, including a pair of computer software, hardware, operating system, database, network communications, and other technology integration, and the manufacturer's product selection and collocation of integration, integrated system can achieve the overall optimization.
1.2 the characteristics of the computer system integration
(1) there is no best, only the most suitable for: computer system integration is not like other products, users are hoping to have the best.
(2) original: due to the computer system integration project is according to the characteristics and needs of the users in their respective and tailored, so each is different, computer system integration and engineering has the originality.
(3) technology: computer system integration is not only to provide a device that is more on the equipment design, development, and debugging, need a lot of technology that can be done.
System integration has the largest extent, improve the system of organic combination, integrity, flexibility and performance, and its complexity is simplified, has to provide users with comprehensive, practical and feasible system solutions are of important theoretical and practical significance.
2, the classification of computer system integration
According to the characteristic of the computer system integration projects, can put the computer system integrated into the computer hardware system overall design and project management services, computer hardware equipment integration and installation of computer hardware equipment, technology and services three categories. Under the management of these three project implementation briefly the definition of classification.
2.1 the overall design and project management
Computer hardware system design and project management services, can also be referred to as the overall design and project management, this basically is the buyer will correct computer hardware system integration project. In general, the computer system integration project of structure design of the buyer as well as the performance index, particle size distribution have a certain understanding. This kind of project implementation requirements related service providers to design computer systems in various fields, it can cover most of the computer system, at the same time, the requirements of relevant technical personnel professional level is high.
2.2 equipment integration installation
Integration and installation of computer hardware equipment can also be called one of the equipment installation. Integration and installation of computer hardware equipment is one of the most common computer systems integration projects, but most consumers of computer hardware that are widely used in the system of project construction mode. In computer systems integration projects of hardware construction, integration and installation requirements the buyer should undertake a comprehensive range of computer system integration framework and equipment performance management qualitative selection argument. In simple terms, related equipment suppliers, as long as according to the standard implementation of the contract equipment suppliers of computer system integration projects, purchasing and installation.
2.3 technical services
Computer hardware technology and services can also be referred to as the engineering and technical services. In view of this type of project, its mainly by its technology and services as the main content of system integration of computer hardware system of construction project. Equipment technical service is usually in a particular service indicators and technical requirements for the main purpose. Making technology and hardware equipment by the buyer, provide the corresponding technical service training support. The implementation of such projects need relevant technical solutions and technology combined with effective argument.
3, computer system integration of the existing problems
3.1 the management problems of microcomputer system and tools software
Because the current computer systems and software tools is larger, if a device problem, need to reinstall the operating system and application software, and usually require the system to work for a day. As a result, a huge number of access to the Internet computer system maintenance personnel the toes, and it is difficult to guarantee the quality of service.
3.2 user management issues
Users are limited in a fixed on the machine, at the same time, the user's data and documents also can keep on the machine. If you want to use other machines, must be on each machine to create the user accounts, and the user's file and the data is copied to the new machine. When a user use fixed machine failure occurs, easy to cause the loss of user data.
3.3 Landmark and other professional application software
In front of the computer system integration, need to be explained in each workstation installation professional application software, and create a user, the user in the specified load data of the machine, in order to work. As a result, users and data is tied with the machine. In some cases, as a result, the machine work at full capacity, the machine is relatively idle.
3.4 peripheral sharing problem
Due to color plotter and color laser printer, tape recorders and other large peripheral expensive price, quantity is limited, can't be configured on each machine, the user can only be logged in to use fixed a few machine.
4, the development trend of computer system integration
Widely integrated distributed network environment and the global competitive market, every enterprise integration center also extends to the integration of enterprises, make the enterprise applications in a distributed network environment of large integrated. The web based user interface is unified, make people in different departments and regions, organization, all users to achieve convenient, real-time access to information, therefore, the site of the unity of the user interface is the inevitable trend, computer system integration.
Specialized and diversified system integration technology, the popularization and application of computer in China, to a great extent, improving national quality, more and more challenges and opportunities. Today's society is a network and information technology integration, system integration model is no longer a simple structure, single function, but based on the network structure of the complex and multifunctional transformation. Therefore, specialization and diversification is an inevitable trend in the development of system integration technology, computer system integration. E-commerce and enterprise information system integration, make the organic combination of enterprise supply chain, the realization of the sharing of information and resources to fully for enterprises to reduce costs, improve efficiency, e-commerce can be said to win the support of the general public, and the enterprise information system integration has become a necessity.
Using today's advanced domain management technology, network technology, storage technology, the development of the research main computer software and hardware platform for the system integration, set up a domain controller, remote installation server, file server, software distribution, NIS + server, database server, print server, tape recorders and so on more than 10 sets of application server, realizes the remote operating system, application software installation automatic distribution, online roaming user data with user, user data, centralized management application software, automatic tape library system, remote data backup, etc. System integration management system has been enhanced while the technical difficulty, but greatly made the user's work, at the same time maximize the realization of the network resources sharing.


Written in EnglishRead online
|Statement||John M. Goodman.|
|LC Classifications||TK6553 .G65 1991|
|The Physical Object|
|Pagination||xix, 631 p. :|
|Number of Pages||631|
|LC Control Number||91008065|
Download HF communication
NVIS propagation detail is included, which is essential for short-range HF communication where VHF/UHF repeaters cannot cover (like some mountainous terrains).
The book may seem a bit dry, but it's not meant to be a by: Book Description Communications using the high frequency spectrum ( MHz) have experienced a considerable resurgence.
In recent years, powerful microcomputers and VLSI technology have greatly enhanced the prospects of overcoming many of the unique problems that formerly afflicted the HF systems HF communication book designer. Communications using the high frequency spectrum ( MHz) have experienced a considerable resurgence.
In recent years, powerful microcomputers and VLSI technology have greatly enhanced the prospects of overcoming many of the unique problems that formerly afflicted the HF systems More designer. The aim of this book, therefore, is to provide a fiCited by: HF Communications: A Systems Approach HF communication book Nicholas M Maslin.
Communications using the high frequency spectrum ( MHz) have experienced a considerable resurgence. In recent years, powerful microcomputers and VLSI technology have greatly enhanced the prospects of overcoming many of the unique problems that formerly afflicted the HF systems More designer. HF Communications Systems and Technology nd Edition by John M.
Goodman (Author) › Visit Amazon's John M. Goodman Page. Find all the books, read about the author, and more. See search results for this author. Are you an author.
Learn about Author Central. John M 5/5(4). ARRL s HF Digital Handbook is your guide to understanding the most active HF digital communication modes in use today. There is something here for every radio /5(20).
Author: Institution of Electrical onics Division Publisher: ISBN: Size: MB Format: PDF View: Get Books. Third International Conference On Hf Communication Systems And Techniques Hf Communication by Institution of Electrical Engineers.
Electronics Division, Third International Conference On Hf Communication Systems And Techniques Books available in PDF. Roland Proesch was born in in Kiel. He studied communication technology in Hamburg at the University of the German Army. Since he is a licensed radio amateur which has enabled him to pursue one of his most profound interests, namely all types of digital s: Today, SGC is recognized as a world class designer and manufacturer of HF SSB communications products.
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This presentation provides a brief overview of HF, HF Communications, introduces its primary capabilities and potential applications, discusses tools which can be used to predict HF system performance, discusses key challenges when implementing HF systems, introduces Automatic Link Establishment (ALE) as a means of automating many HF systems, and lastly, where HF standards and capabilities.
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High Frequency Communication and Sensing: Traveling-Wave Techniques introduces novel traveling wave circuit techniques to boost the performance of high-speed circuits in standard low-cost production technologies, like complementary metal oxide semiconductor (CMOS).
A valuable resource for experienced analog/radio frequency (RF) circuit designers as well as undergraduate-level. HF Digital Communications – A Brief History 1. The Early Years (mid s to early s) 2.
The Age of Innovation (early s to late s) 3. The Modern Era (late s to present) Digital Communications have been available to amateur radio operators for many years, and can be divided into 3 separate eras. Maslin, N.M. "HF Communications - A Systems Approach".
ISBNTaylor & Francis Ltd, Johnson, E.E., et al., "Advanced High-Frequency Radio Communications". HF propagation using the ionosphere was also used for ships, although they now utilise satellite communications.
Typical antenna used for HF communications via the ionosphere Radio amateurs or radio hams also make widespread use of HF propagation via the ionosphere, often communicating with distant points on the globe with low powers and modest.
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absorption adaptive HF. URG-III HF communications system – Latest in digital signal processing techniques and software-intensive, high-level control implementation to provide flexible, powerful and highly reliable data and voice operation in the HF band.
The heart of URG-III is the RT receiver-exciter. Radio spectrum for communications ranges from approximately 30 Hz (termed Extremely Low Frequency [ELF]) to above GHz (termed Extremely High Frequency [EHF]). Because of its capability to provide very wide area coverage and pene-trate sea water, ELF has been used for global systems for providing low-rate submarine.
[ HF Communications Transceiver Pilot's Guide, pages to ] Because HF radio waves depend upon the ionosphere for reflection, their propagation is affected by changes in the ionosphere. It is changes in the density of the electrically charged particles in the ionosphere which cause propagation to improve or deteriorate.
A wide variety of unique systems and components inhabits the HF, VHF, and UHF bands. Many communication systems (ionospheric, meteor-burst, and. One of the most difficult ways to communicate by radio is over the high-frequency (HF) bands.
These channels, which lie between 2 MHz and 30 MHz, are touchy and unpredictable, prone to noise. HF communication is thus no longer restricted to voice and is undergoing a resurgence of interest due to the need to find a means of long distance data communication that will augment existing VHF and SATCOM datalinks.
An aircraft HF radio system operates on spot frequencies within the HF spectrum. Third-Generation and Wideband HF Radio Communications, Hardcover by Johnson, Seller Rating: % positive. Jay Sklar is adding a new book on high-frequency communications to the MIT Lincoln Laboratory Series published by MIT Press.
Photo: Glen Cooper In the book, after reviewing HF propagation phenomenology, communication signal formats, and HF receiver architectural approaches, Sklar introduces modulation approaches and signaling protocols used at.
cal communications for more than 80 years; however, with the advent of satellites, HF had been de-emphasized and fell into disuse. As a result of that, many present-day communicators don't have an under-standing of what modern HF communication capabilities are.
This document is a layman's tutorial on HF radio communications. VHF - Very High Frequency Ł Range: 30 MHz - MHz Ł Government and public service operate primarily at MHz to MHz for incidents Ł MHz to MHz used extensively in NIFC communications equipment Ł VHF has the advantage of being able to pass through bushes and trees Ł VHF has the disadvantage of not reliably passing through.
COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.
L3Harris HF manpack radios are flexible and reliable solutions for forward-deployed forces in remote areas. Capable of communications over distances of 3, km or more, they are rapidly deployed and require minimal infrastructure. They are also interoperable with existing VHF radio systems.
f = c / λ and λ = c / f. The higher the frequency, the shorter the wavelength, and vice versa. Radio waves oscillate at frequencies between the upper end of human hearing at about 20 kilohertz, or kHz (kilo is the metric abbreviation meaning 1,), on up to 1, gigahertz, or GHz (giga is the metric abbreviation meaning 1 billion).They have corresponding wavelengths from hundreds of meters.
Digital data on HF. More and more HF radios provide a connector or two with a digital data interface built in so that it’s easy to connect a personal computer and operate on the digital modes, such as PSK31 or RTTY.
A few even have a built-in data modem or a terminal node controller (TNC), which is a type of data modem used for packet radio. HF Communications, A System Approach by Nicholas Maslin 1. High Frequency Active Auroral Research Program – Wikipedia 2.
High Frequency Global Communications System – Wikipedia 3. High Frequency Internet Protocol – Wikipedia 4. HF Radio & Network Centric Warfare, research paper published in 09 Aprilwww.
isode. com. Book Description. High Frequency Communication and Sensing: Traveling-Wave Techniques introduces novel traveling wave circuit techniques to boost the performance of high-speed circuits in standard low-cost production technologies, like complementary metal oxide semiconductor (CMOS).
A valuable resource for experienced analog/radio frequency (RF) circuit designers as well as. HF Communications: Past, Present, and Future: Jinlong Wang 1, Guoru Ding 1,2,*, Haichao Wang 1: 1 College of Communications Engineering, Army Engineering University of PLA, NanjingChina; 2 National Mobile Communications Research Laboratory, Southeast University, NanjingChina.
Contents Introduction to the Fourth Edition ix 1 Introduction to Radio Broadcasting and Communications 1 2 Radio-wave Propagation 5 3 Transmission Lines 59 4 The Smith Chart 95 5 Fundamentals of Radio Antennas 6 High-Frequency Dipole and Other Doublet Antennas 7 Vertically Polarized HF Antennas 8 Multiband and Tunable-Wire Antennas 9 Longwire Directional Antennas This book provides a fundamental and practical introduction to radio frequency and microwave engineering and physical aspects of wireless communication In this book, the author addresses a wide range of radio-frequency and microwave topics with emphasis on physical aspects including EM and voltage waves, transmission lines, passive circuits, antennas, radio wave s: 1.
Very High Frequency Radio Ultrahigh Frequency Radio Data Communications Chapter 3. Equipment Siting and Grounding Techniques High Frequency Very High Frequency and Ultrahigh Frequency Grounding Techniques Data Communications Chapter 4. Antennas High Frequency Antennas Very High Frequency Antennas Antenna.
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FOR STRIP LINES:Microwave_Engineering_David_M_Pozar_4ed_Wiley_ ANALYTICAL AND COMPUTATIONAL TECHNIQUES IN ELECTROMAGNETICS Reference Books 1. Peterson, A.F, Ray, S.L. and Mittra, R., "Computational Methods for Electromagnetics”, Wile.
Ham Solar is using code from Paul N0NBH website. Its requires internet connection. A Hourly Area Prediction (HAP) Chart feature is also provided by this app. Its specifies the Maximum Usable Frequency (MUF) for HF communications between the base specified and any location on the map.
The colors represent the MUF for communications between that location on the map and the base selected. Introduction: Adolescents living in orphanages experience a lack of self-confidence, withdrawal, lack of interest in learning, lack of communication, and a closed attitude so that it will have a.
Audio Books & Poetry Community Audio Computers, Technology and Science Music, Arts & Culture News & Public Affairs Non-English Audio Spirituality & Religion. Librivox Free Audiobook. MinerLee Show Gary England's Tornado Alley M-magasinpodden Fairweather POETRY JAWNS: A PODCAST Life and Times with Mike & Tari Day Full Kontroll.Download Advanced High Frequency Radio Communications books, This up-to-date, comprehensive reference and planner's guide presents an in-depth description of automated HF communications.
Language: en Pages: Advanced High-frequency Radio Communications. HF Communication Basics Part 2 1. Communication Basics Part 2 High Frequency Radio General Knowledge of HF Radio and Introduction to Vertex Standard Prepared by: Ahmad Sajjad Safi, CNS Instructor 2.
Introduction to HF Radio 2 High frequency (HF) is the ITU designation for the range of radio waves between 3 and 30 MHz.


WhatsApp released a new message encryption software that only allows you and the receiver to read and reply to the message.
WhatsApp encryption is available to everybody who has the latest version of WhatsApp on their smartphones. It was introduced so that WhatsApp users can have more privacy and make the conversation seem as if it is happening face to face. This privacy setting is on by default and may not be turned off.
The encryption setting is not only set to protect your text messages but your files sent via WhatsApp as well. Each message sent, is protected by their own unique lock. What does this mean? It means that only you and the person you intend sending the message to can unlock and read the message.
How to check if your messages are locked? Simply look for:
Today, there are more than 1 billion people who rely on WhatsApp to get messages to the next person. They can now send messages more securely and feel safe about what they send.


When the AC current is over load, the AC voltage on the load and the alternating current of the load generate phase difference, and the concept of power factor is introduced. People produce and live electricity from the electricity grid, which provides alternating current frequencies of 50Hz or 60Hz. As an alternating current load has three types of resistors, inductors and capacitors:
1, when the AC power through the pure resistor load, the AC voltage added to the resistance and the AC current through the resistance is the same phase, that is, the phase angle between them ф=0°, at the same time in the resistance load consumption of active power, the power grid to provide energy.
2, when the AC power through the pure inductance load, the alternating current phase of the AC voltage is 90°, the angle between them is ф=90°, the reactive power is generated on the inductance load, and the electric energy supplied by the grid can be changed into a magnetic field in the inductor and then returned to the power grid for a short period of time, so that the periodic cycle, Results The power grid does not provide energy, so it is called "reactive force", but the "reactive power current" which produces the "Var" still exists.
3, when the AC power through the pure capacitor load, also similar to this, except that the AC voltage on the phase hysteresis AC current phase 90°, the angle between them ф=-90°.
Here, the definition of phase angle is positive and phase angle lag is negative. The actual load is resistance, inductance inductance, capacitance resistance three kinds of complex, after the composite collectively referred to as "impedance", written as the mathematical formula is: Impedance z=r+j (XL–XC,. where R is resistor, XL is inductance, XC is capacitive resistance. if (XL–XC, 0, called "perceptual load"; Conversely, if (Xl–xc, < 0 is called "Capacitive load").
Alternating current phase (0°< ф< 90°), alternating current phase of AC voltage when AC power passes through the inductive load, alternating currents phase hysteresis ( -90°< ф< 0°); The electrician defines the angle ф as the power factor angle, The cosine value of the power factor angle ф is called the Cosф power factor. For resistive loads, the difference between the voltage and current is 0°, therefore, the power factor of the circuit is 1 max (Cos 0°=1, while the pure inductance circuit, the voltage and current bit difference is 90°, and is the voltage advance current; In the pure capacitor circuit, the voltage and current position is -90°, that is, the current advance voltage. In the latter two kinds of circuit, the power factor is 0 (Cos 90°=0,. For a general load circuit, the power factor is between 0 and 1. By the mathematical impedance z=r+j (XL–XC), if XL=XC, then z=r, that is, impedance z into a pure resistance, power factor is equal to 1.
That is to say, the perceptual load and capacitive load can compensate each other, the inductance value of the perceptual element in a circuit is exactly equal to the tolerance value of capacitive element can be completely compensated, the method of power factor compensation originates from this. When alternating current is carried by impedance load, the total power generated by S is called "apparent power", depending on power s including active power p and reactive energy Q two components. Which active power P=s*cosф, reactive q=s*sinф. Only when the power factor Cosф value equals the maximum value of 1 or ф=0°, the reactive component Q equals zero, and the active power p equals to the value of the power S. But the actual working ability of the load is only related to active power.
Power factor and LED illumination
In this paper, the concept of power factor and power factor compensation is described, and the conclusion that the power factor compensation circuit does not need to be increased in LED lighting is demonstrated by the characteristics of capacitive load of LED lamps.
The harm of low power factor
(1) The load-carrying capacity of the power supply equipment has been discounted, which reduces the load-carrying capacity. If a device can supply 100KVA of the apparent power, if the power factor is 0.7, then can only provide 70KW of active power; If the power factor is 0.9, then the active power of 90KW can be provided, so it is significant to improve the power factor.
(2) The transmission line loss is increased due to the existence of reactive current. For example, the power factor is 0.7, to provide 70KW of active power, it is necessary to provide 100KVA of the apparent power, transmission lines of the current increase, the line loss is bound to increase.
Power Factor Compensation Method
Electricity supplied by the power supply department is calculated as "apparent power", but the charge is the "active power" to calculate, the user's "Watt-hour meter" is actually "active power meter", between the two there is a "power factor" discount, so the power factor is a very concerned about the supply sector data. If the user does not achieve the ideal power factor, the relative is consumes the power supply department resources. At present, at home, the power factor regulation must be between 0 of the electrical sensibility. Aged.
Power factor compensation can be done in the following ways:
(1) Semi-centralized and centralized compensation method, requiring the power-supply enterprises of each distribution room must be installed power factor automatic control device, real-time detection of power factor size, automatic input or removal of the number of compensating power capacitors for motor operation compensation (because the main electric load is the motor, to achieve local power network power This approach has been enforced since the late 70 and early 80, and has so far been less than more than 20 years. There are also various power supply units installed power factor control device, to its jurisdiction of the power supply area further compensation.
(2) The decentralized compensation method, requires that each electrical appliance design will use advanced technology to meet the power factor standards, so that whenever and wherever electricity can ensure the power factor standards. But this will increase the cost, increase the volume of electrical appliances, and some appliances to the size of the limit is very strict, increase the design difficulty.
Review of light source lighting and power factor compensation The electric lamp is started by the incandescent bulb, the incandescent bulb is pure resistance load, there is no power factor compensation problem. In the late 50, fluorescent lamp quickly became the main lighting, the ballast used silicon steel inductors, high reliability, long life, still have a small number of use, most of the power factor compensation, may be affected by cost factors, or people do not understand the power factor compensation, energy-saving awareness is not strong. Also have to add the appropriate capacity of capacitors for power factor compensation, used in 30W, 40W large wattage fluorescent lamp, 20W is less used. After the 90 's, people's environmental protection, energy-saving awareness, the development of a three-color fluorescent powder energy-saving lamps, its light efficiency is higher. Electronic ballast was subsequently introduced, with a three-color fluorescent powder lamp, energy-saving effect more significant. Some IC manufacturers at home and abroad have introduced the lamp with the source power factor compensation chip, uses in the electronic ballast, the performance is excellent, but increased the cost and the electronic ballast volume, the populace cannot accept its price, about only uses in the high-end lamp product. A large number of popular electronic ballasts, including energy-saving lamps do not add any power factor compensation measures, which are popular in the market energy-saving lamps, fluorescent lamps everywhere. In other words, the past lamps basically do not have any power factor compensation measures, but everyone is using.
LED power consumption is more province, lighting than energy-saving lamps are smaller. LED lighting Of course more progress, environmental protection, energy saving and emission reduction more appropriate.
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Call phones from Gmail is free to the US and Canada for the rest of 2013. In addition to calling a phone number in Gmail, you can also receive calls if you have a Google Voice account.
To place a call in Gmail:
Make sure Google voice and video chat plugin is installed.
- 1. Now make sure the Chat box is expanded in Gmail.
- 2. Click Call phone under Chat.
- 3. Use the keypad (with your mouse or the keyboard’s number block) to dial the desired number.
- 4. You can also start typing a contact with a phone number under Search or dial; the number will be entered automatically.
- 5. If a number appears in an email message and is highlighted as a link, you can also click it to have the Gmail dialer come up with the number pre-entered.
- 6. Click Call
To end the call, click End.
To receive calls in Gmail:
- Make at least one outbound call from Gmail.
- In Google Voice, navigate to Voice settings under the gear icon.
- In the Phones tab, click the check box next to Google Chat.
One neat feature with call phones from Gmail is the ability to switch phone in the middle of a call. For example, if you answer your call in Gmail and wish to switch to your cellular forwarding number, pressing * will cause your cellular forwarding phone to ring for you to complete the call.


Kavehrad selected as IEEE Distinguished Lecturer
UNIVERSITY PARK, PA. – Mohsen Kavehrad, W.L. Weiss Chair Professor of Electrical Engineering, has been selected as an Institute of Electrical and Electronics Engineers (IEEE) Communications Society Distinguished Lecturer for 2016 and 2017.
Distinguished Lecturers are chosen based on their renowned authority on communications and networking-based topics, as well as their ability to be engaging speakers and leaders in a communications-related field. In addition, Kavehrad's wide array of expertise in the areas of digital communications, computer networking, intelligent networks, multimedia communications, mobile computing, local area wireless networks, portable and mobile communications, optical fiber communications, optical networking, coding and information theory and satellite communications, also contributed to this esteemed honor.
A Penn State faculty member since 1997, Kavehrad is the founding director of the Center for Information and Communications Technology Research and founder of the National Science Foundation’s Industry/University Cooperative Research Centers Program, the Center Optical Wireless Applications which is now the Photonics for Communication, Sensing and Illumination Center.
Prior to joining the University, he held positions at Fairchild Industries, GTE Corporation and Bell Laboratories; was a professor and director of photonic networks and systems thrust in the Communications and Information Technology Ontario at the University of Ottawa; and served as a chief technical officer and vice president of TeleBeam, Inc. in State College.
A fellow of the Institute of Electrical and Electronics Engineers since 1992, he received his Ph.D. degree in electrical engineering from Polytechnic Institute of New York University.


Siemens has introduced its Comos Mobile Worker, a new software application for mobile data management with integrated reality functionalities. Particularly, the app enables fast and safe maintenance of process plants.
Furthermore, the app processes the required data, including ERP systems, engineering data, and live data from the process control system. Siemens developed the app along with Augmensys GmbH, which specializes in mobile data management and augmented reality.
Thanks to the direct connection to the Comos engineering software, all linked engineering data give holistic view of the plant. At the same time, the bidirectional exchange between the systems allows easy and secure transfers of changes or annotations.
The integration of location data also supports on-site navigation. If necessary, AR displays the relevant information to the user on a mobile device such as a tablet, smartphone, or data glasses. Correspondingly, the user can edit the data directly in the field. It can document work packages as done and import photos. In addition, it notes back into the corresponding information sources via bidirectional interface.
Consequently, this information is then accessible to all authorized employees who can process directly. By contacting the service technician via video chat can reduce unplanned plant downtimes to a minimum or avoided altogether.
Use cases include commissioning, inspection, mobile maintenance, and remote access to experts. A continuous Ethernet connection within the system is not necessary, as data processed by the offline function can be synchronized retrospectively.
Moreover, the UBIK software platform of Siemens partner Augmensys powers the Comos Mobile Worker app, and can also work as a standalone. The solution is part of the “Siemens Digital Worker”, a concept that enables operating personnel to digitize and automate work in the field using state-of-the-art technologies such as AR/VR.


Qualcomm announces Snapdragon 888 Plus at MWC 2021.
Qualcomm Technologies announced the new Snapdragon 888 Plus 5G Mobile Platform. It is the direct successor to the flagship Snapdragon 888. These two platforms power more than 130 designs announced or in development. Snapdragon 888 Plus fuels flagship experiences with intelligent entertainment, including AI-enhanced gameplay, streaming, photography, and more. It is further backed by boosted performance, great speed, and premium connectivity.
The platform is armed with the full arsenal of Snapdragon Elite Gaming features to harness the power of ultra-smooth responsiveness, color-rich HDR graphics, and mobile-first desktop-level. Compared to its predecessor, Snapdragon 888 Plus offers an increased Qualcomm Kryo 680 CPU Prime core clock speed at up to 3.0 GHz and the 6th generation Qualcomm AI Engine with up to 32 TOPS AI performance, which is more than 20% improvement.
Besides that, the company today announced the expansion of its 5G RAN Platforms portfolio with the addition of the Qualcomm 5G DU X100 Accelerator Card. The Qualcomm 5G DU X100 is designed to enable operators and infrastructure vendors the ability to readily reap the benefits of high performance, low latency, and power-efficient 5G, while accelerating the cellular ecosystem’s transition towards virtualized radio access networks.
Qualcomm has also unveiled its latest research milestones and innovations for advancing the next chapter of 5G. The new and updated R&D over-the-air (OTA) testbeds and system simulations display Qualcomm Technologies’ continued leadership in enhancing the 5G system foundation to bring even more capacity, wider coverage, and lower latency to mobile operators and devices on a global scale. The testbeds and system simulations also highlight 5G’s horizontal capabilities to transform a wide range of industries from industrial IoT, automotive, enterprise, and more.
Lastly, a contingent of mobile communications companies announced their collective support for 5G mmWave technology globally. This includes key players from a growing number of regions including China, Europe, India, Japan, Korea, North America and South-East Asia. The industry leaders aim to build on the existing momentum behind 5G mmWave, which allows them to address the significant increases in user data demand, and to expand the role of the mobile ecosystem in supporting economic development across many industries.
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Oil & Gas Automation - Remote Automation Solutions
Emerson Automation Solutions is the leading global supplier of flow computers, SCADA solutions, remote terminal units (RTUs) and state-of-the-art technology. As an Emerson Local Business Partner, ECI is the single source for all your needs from field equipment to data collection. We provide the industry-specific expertise in oil and gas along with high quality products to help you achieve peak financial performance and long-term sustainability.
Oil & Gas Automation solutions target measurement and control needs in remote locations with the right technology, services and integrated architecture to deliver quantified business improvement, as well as optimum production, operations and reliability, ensuring a competitive edge. We support every step of the oil and gas industry from production, transmission and distribution by utilizing our technical expertise, repair services, educational services and system engineering.
OpenEnterprise is Emerson’s leading-edge SCADA system targeting the Oil & Gas production, distribution and transmission applications. OpenEnterprise incorporates 20 years of experience across a global install base. This has shaped the product into a user-friendly platform built for remote mission-critical applications where data integrity and uptime are essential for operating over complex communication networks.
Built on a 64-bit database engine, OpenEnterprise v3 is a modular, highly scalable platform that addresses the needs of Oil & Gas markets from local metering and compressor station monitoring and control to Mega i-Field automation projects that comprise of thousands of meters and wells. OpenEnterprise is a highly scalable SCADA system that can operate as a single box HMI to enterprise wide SCADA platform.
OpenEnterprise reduces operational and maintenance lifecycle costs and improves operational efficiency across the Enterprise. OpenEnterprise v3 is based on a Human Centered Design (HCD) approach which focuses on ease of use, not only from the user interface perspective, but also through enhanced server functionality leveraging reusable objects and intelligent automation aimed at improving Operator productivity.
Solar power system solutions have been a primary power technology for the oil & gas industry since the 1970's, designed originally to meet the remote power challenges and diverse energy needs of oil and gas production. Our systems are engineered to provide cost-effective, reliable battery-based power solutions to remote sites. Tens of thousands of robust remote power systems operate 24/7/365 throughout the Americas and Middle East in all oil and gas producing regions. With proven and expansive capabilities, the demand for this integrated technology solution continues to increase.
Remote oil & gas industry production sites require power for wellhead, pipeline and wireless datacom applications. SunWize Power & Battery solar power systems, easily deployed in any environment, are fully integrated technology solutions for field installations delivering electricity for pipeline monitoring, telemetry, and cathodic protection. Automation equipment can include high-efficiency gas-flow computers, remote telemetry units (RTU's) and supervisory control and data acquisition equipment (SCADA).