Piezoelectric Motors – the Better Alternative
Piezoelectric motors have evolved from their beginnings in laboratories to use in mass production industrial applications. Modern piezo motor designs provide a higher level of performance from a smaller size, produce higher resolution movement, and require less power and energy than other types of positioning technologies. Because of this, piezoelectric motors have several advantages over traditional motion control devices.
With their low power consumption, compact size, and ultra-high precision motion, piezoelectric motors are being used in an increasing number of applications. They have typically enjoyed wide use in semiconductors and industrial devices requiring precision control. In recent years, the use of piezoelectric motors in digital cameras and cell phones has grown rapidly.
Piezo-based motion is now used in infusion pumps, microscope stages, optical positioning, instrumentation, inkjet nozzles, and more; inexpensive piezo motors and actuators are used for audio sounders, alarms, door locks and even small loudspeakers. Piezo motors can be fast, can reach into the multi-kHz range — impossible with electromagnetic motors — and are precise, repeatable, and controllable. Furthermore, they are clean, with no bearings needing lubricant that may cause contamination, while their non-metallic nature is also an advantage in many situations (for example medical MRI).


At home, shopping in town, visiting with the grandchildren — you enjoy the simple pleasures in life and want hearing technology that is comfortable, is reliable, and helps you hear your best with no fuss.
AGX3 technology is custom programmed to match your hearing loss and the settings you enjoy most. By helping you communicate more clearly with your family and loved ones, you’ll enjoy stronger relationships — both at home and in your community — and you’ll be able to overcome the feelings of isolation and fatigue that all too often accompany hearing loss.
Get more out of your sound experience by meeting with your Indiana Audiology provider to learn how today’s best hearing technology can help you. They will be there for you every step of the way — from precisely diagnosing and assessing your hearing loss to fitting and adjusting your hearing technology to meet your changing needs.
Backed by the strongest service program in the hearing care industry, you can rest assured that your AGX® Hearing technology will provide dependable communication assistance and continue to meet your unique hearing needs for years to come.


Your network is down, and you’ve had your IT tech team working hard on getting it back up for hours to no avail. Instead of calling a technician out and waiting even longer to get your network up and running, you can use our remote IT services to have the problem fixed in a quarter of the time. We can plug-in to your network and machines from afar, making it easier for A One Networks Consulting to fix your issue with ease and speed.
When you bring A One Networks Consulting’s IT services on board your company’s team, you bring the following, too:
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Call Monitoring helps Supervisors to listen to ongoing calls in real-time. Monitoring helps you to guarantee quality standards are being met, and gain valuable insight into the needs of your customers. The three different levels of monitoring available are:
Monitoring is a one-way means for Supervisors to listen to agent calls without any interference.
Whispering allows the Supervisor to speak directly to the agent over the call without letting the customer know. This is a great way of assisting agents when they are in a fix over a difficult call. The agent cannot talk to the supervisor directly in this case without the customer's knowledge.
For times when it becomes unlikely that an agent will be able to resolve the customer's concern and the Supervisor feels the need to step-in, Call Barging is the perfect solution. Barging makes this call a three-way conference and allows Supervisor to talk to customer directly.
To learn how to activate the various stages of call monitoring visit here.


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Telecommunications: Rent Mobile Cell Towers in Whitecourt
When your employees go out to a remote oilfield location, we know that you need to keep in contact with them. Managers still need all the amenities of a city office in the middle of the forest or someplace equally remote. We understand. For this reason, Stratty Enterprises has a variety of telecommunications options for companies in the energy industry.
Keep in Touch with Phone Service
Your employees can have cell service even when they are far from their families. When they stay on-site, they can use their cell phones with our mobile cell towers in Whitecourt or other locations. We also carry cell repeaters to boost existing cell service in semi-remote areas. Our team can also set up a VOIP phone system, which allows employees to call on phones connected to the internet instead of a traditional phone line.
Stay Connected with Internet
Your employees still need internet service to get their jobs done, even in the most remote areas. Rent a Ka- or Ku-band satellite unit and stay in touch with them no matter where they go. Our mobile units provide reliable satellite internet service that you can count on.
Improve Communication with Radios
Loud machinery and big equipment can hinder employee-to-employee communication on a job site. Make sure directions are heard and emergencies are prevented by using a radio system on your next oilfield job. We rent out truck radios, rig phones and handheld radio packages to keep communication easy. You will eliminate misunderstandings and mistakes with one of these efficient radio systems.
Our communications products include:
These days, there is no reason why your remote work site should lack modern conveniences. Rely on telecommunications rentals like cell towers in Whitecourt from Stratty Enterprises. Call us today to get started.


Notably, 5G promises vast improvements in speed, responsiveness, and scale to support all kinds of bandwidth-hungry applications and technologies. Mobile operators expect to deliver 5G mobile download speeds in the gigabits-per-second range, around 50 times faster than existing 4G LTE technology. Researches are going all around the world to develop a new technology which will play a very important role in the … Here focus on the problems like better signal coverage , high data speed greater than 1gbps, cognitive in 5G and 5g master key technology is also discussed. As communications now impacts on virtually all areas of society, commerce and business, job opportunities are excellent, and you will be equipped for employment across a range of sectors including mobile/wireless, IT, defence, and big data.
With the increasing demand of high data rate and increased in capacity, it is become necessary to analyze thedifferent modulating techniques. By using a good modulation schemes, the growth in speed and capacity can be achieved. In thispaper, we have designed a MC-CDMA for different modulation methods like BPSK, QPSK, 256-QAM, 512-QAM and 1024-QAM.To reduce the Inter-Symbol-Interference, MSE …
Therefore, these companies are forced to install many antennas in a relatively small area for adequate coverage. To identify these promising companies, he meets with engineers and scientists to discuss their latest innovations – an approach he learned while he was starting in the natural resources industry. His strategy revolves around him finding the next generation of influential tech firms by spotting them while they are still small. 5G lives up to its promise of delivering super-fast internet, but only when you are outdoors and within range of the nearest antenna.
Use of the 5G mmWave band requires many small base stations because the high radio-wave frequency only propagates over short distances. As a result, the Precision Time Protocol is used to synchronize time between base stations. Time synchronization using PTP demands strict evaluation of the entire network to maintain time differences within the permissible range. The Field Master Pro MS2090A RF spectrum analyzer is the highest performing handheld test and measurement solution available to meet the challenges of 5G field testing while maintaining support for a full range of wireless technologies. RF RF Measurements OTA measurement of channel power, occupied bandwidth, and spectrum emission mask .
The speeds of 5G are up to 100 times faster than those of 4G, so in this way they don’t even come close to comparison. 5G is going to be something that just about everyone can agree on being revolutionary, and with revolutionary technologies come big investment opportunties. Independently owned and not on anyone’s payroll, here at Green Bull Research we do our darnedest to shed some light on light on the misleading investment opportunities out there. Seeing as investing in large network providers is prohibitively expensive, you’ll do well to invest in a smaller company that will have a part to play in the overall scheme of things. If the “5G Master Key” works as intended, you could be in for a sizable windfall.
She experienced as a teacher assistant from 2004 to 2010; a vice professor from 2011to 2015; a professor from 2016 to now. Her research interest includes the biological techniques using ultrasound to targeted delivery drugs into cells, the biological information modeling techniques for prediction clinical outcomes. Wei Ning, born in 1977, graduated from School of Mechanical and Electrical Engineering, Central South University in 2005 with a master’s degree in mechanical design and theory. He has long been engaged in research on transformation of scientific and technological achievements and electromechanical control.
In this article, coverage enhancement techniques are first analyzed. A field trial adopting pre-commercial 5G systems is then set up to assess the coverage performance. The analysis along with the promising field trial results indicate that the coverage of the 3.5 GHz frequency band can be guaranteed in the 5G network deployed with 4G legacy sites. At the same time, there is huge increasing demand from industries, health sectors and educational sectors to utilize the advantage of wireless communication. Till now, 5G is not defined; however, it may be the integration of several wireless techniques .
The extra investments that 5G demands put pressure on the company’s finances, and as a result Nokia shares plummeted by 21%. This resulted in a boost to the company’s stock of around three percent, with the share price rising to $136.00 by September 6th. But a move by KeyBanc Capital Markets to downgrade T-Mobile may have had a negative effect, as the share price dipped to $127 as of September 16th.
The main objective of this algorithm is to reduce the active time of each sensor in the network. We also reduced the total bit error rate in the network by introducing a dynamic bit interleaving method with a feedback loop. It is known that In the PHY layer, encoding and decoding are implemented with the help of a passive modulation scheme to reduce the delay in the network. In the encryption process, the Elliptic curve cryptography method is used, which reduces the number of iterations required for encrypting the data.
The mobile 5G technology will allow for higher flexibility, lower cost, and shorter lead times for factory floor production reconfiguration, layout changes, and alterations. The launch of 5G will affect a huge number of companies, from mobile networks, to healthcare and gaming. This will consequently boost the stock market, as 5G brings new opportunities and revenue streams for companies. And 5G stock prices are likely to increase, as they have over the last 12 months. To complete the training in 5G technologies, the trainee will also study the main radio innovations utilized in this brand-new generation, such as the new 5G-NR air user interface, making use of mmWave, beamforming, scalable numerology, and so on.


Fahrradzubehör von Croozer. Sofort ab Lager lieferbar - kaufen The DCi DA Series includes a high-powered DSP with JBL speaker tunings, network control/monitoring, and the ability to drive 2/4/8/16 ohm, 70V and 100V speaker loads. The amp's advanced capabilities and support for Dante Domain Manager makes it perfect for installations that have standardized on Dante for networked audio transport Eight-channel, 600W @ 4Ω Power Amplifier with Dante™ / AES67 Networked Audio, and 70V/100V / EN 54-16 Compliant for Life Safety Applications more details Crown Around The Worl Crown Audio's DCi 4|600DA is a four-channel, 600W Power Amplifier with Dante™ / AES67 Networked Audio, 2/4/8Ω and 70V/100V. Crown Audio - Dci 8|300DA The DriveCore Install DA series is a line of premium installation amplifiers with Dante™ networked audio transport that are based upon proprietary DriveCore technology Crown DCi-DA Series brings Dante networked audio options to the industry-leading DriveCore Install amplifier family LAS VEGAS —Building off of the highly successful Crown DriveCore Install family of amplifiers, Crown by HARMAN today introduced the DCi-DA Series amplifiers that feature Dante networked audio transport
Crown Audio's DCi 4|300DA is a four-channel, 300W Power Amplifier with Dante™ / AES67 Networked Audio, 2/4/8Ω and 70V/100V Crown Around The World; Training; Support. Contact Us; Anytime Help Center; Consultant Portal; Software; Downloads; Warranty; Product Registration; Forum; System Design Tools; FAQs; English English (US) 中国 (Chinese) Português (Brasil) DriveCore Install DA Series. DriveCore Install (DCi) Comparison Chart. Products. DCi 4|300DA. Four-channel, 300W @ 4Ω Power Amplifier with Dante™ / AES67. The DriveCore Install DA series is a line of premium installation amplifiers with Dante™ networked audio transport that are based upon proprietary DriveCore technology. These amplifiers feature an efficient design with network control/monitoring, high-level DSP with JBL tunings, and 2Ω/4Ω/8Ω/70V/100V direct output compatibility
Crown CTS amplifiers with USP3 - ***No OIF file***? 21 views 0 comments 0 points Started by s2h September 2019. Crown XLS 1500 amplifier fault. 517 views 1 comment 0 points Most recent by morandsa September 2019. Wiring JBL tweeters . 61 views 2 comments 0 points Most recent by WNG555 September 2019. Newbie Crown user....CL1 power amp transformer hum audible. Normal? 14 views 0 comments 0. All these amplifiers are capable of delivering robust, high-fidelity power to drive a wide range of loudspeaker configurations including 70V and 100V systems. The Q models offer mic/line inputs into the Q-SYS Ecosystem, while the Qn eight channel models provide no analog inputs thereby reducing the overall system cost The SMA-4P2408 is a powerful System Amplifier with four analog inputs, two AES3 inputs, two Dante inputs, four outputs (2x2400W + 2x800W @ 4 Ohms), 10 PEQ bands per input and output and a frequency range up to 40kHz. The rugged analog input stage accepts input voltages of up to +23dBu thus matching any source [ Crown Audio XLi 1500 Stereo Power Amplifier with Touch Fastener Straps (10-Pack) & (2) XLR Cable Bundle. 4.5 out of 5 stars 13. Crown D-75A D Series Power Amplifier. 5.0 out of 5 stars 3. Crown CTs 4200A Four-Channel Power Amplifier 180 watts per channel at 8 Ohms. 5.0 out of 5 stars 5. Professional Audio Bluetooth Power Amplifier - 2-Channel Rack Mount Bridgeable, LED Indicators, Shockproof.
Crown DCi 4|1250DA Power Amplifier with Dante Dante-enabled amplifier with DSP, network control/monitoring, GPIO, 2/4/8 ohm and 70/100V operation. 4 channels, 1250W/ch. $ 5,430 .0 Crown Zubehör. Wand-Bedienelemente zur Lautstärkeregelung, Rack-Einbausätze und Übertrager zur Impedanzanpassung. Crown Archiv. Im Crown Produktarchiv finden Sie Informationen über nicht mehr erhältliche Verstärker. Für diese Geräte leisten wir auch weiterhin Support The Crown DCi 4/600DA DriveCore Install DA Series is a 4-channel power amplifier with Dante / AES67 networked audio and integrated DSP. The amplifier is capable of producing 600W of output per channel and works with 2-, 4-, 8-, and 16-Ohm speakers or with 70/100Vrms systems. Channels can be bridged for powering higher power applications such as a subwoofer
Crown XTi4002 Amplifier [XTi4002] - Amps: There's no debate - when you choose Crown's XTi 2 Series, you're choosing one of the most powerful and innovative amplifiers on the market today. That's because the all-new XTi 2 Series amps continue to set the standard for unmatched performance and value, delivering the goods night after night withou Crown Audio is a pioneer in amplified sound, designing and manufacturing world-class professional audio products for more than 65 years. With more than 60 patents on amplifier technology, Crown's amplifiers and system control products are a staple in live and fixed installations. JPRO is the official distributor of Crown in NZ Part of Crown's flagship line of networked install amplifiers, the new amps support Dante and AES67 networked audio at lower wattage than existing DA Series amplifiers, and aim to provide output power, channel count and speaker load flexibility and proprietary DriveCore technology in one package. OSA Updates Chicago's Navy Pier With Harman. The DCi DA Series includes a high-powered DSP. The Crown DCi-DA Dante amplifiers will also support AES67 through a forthcoming firmware update. In addition to the new Soundweb London DA processors and Crown DCi-DA amplifiers, new AMX Networked AV N2000 and N1000 Series Video encoders and decoders will be released with support for AES67 providing networked audio compatibility with BSS and Crown products. The model numbers of these encoders. crown, dci4x600da-u-ekfx, crown dci4600da amplifier 4x600
DANTE. HARMAN's support of Dante networked audio allows audio to be passed through BSS Soundweb London BLU-806DA, BLU-326DA, or BLU-DA devices into any Crown BLU link-enabled amplifier.These Soundweb London processors make it possible to use Dante to pass audio between multiple locations, capable of being routed through switches and existing network infrastructure Crown DriveCore Install (DCi) DA Series Amplifiers for EN 54 Applications. Part 16 of the European Union's (EU) EN 54 standard for fire detection and alarm systems has a specific requirement for voice alarms, which output messages in the form of a voice message rather than a traditional siren Buy Crown Audio DCi DriveCore Install 4-Channel Power Amplifier with Dante Networked Audio (1250W) Review Crown Audio nul


Ultimate Business Flexibility
If your business still uses a traditional office phone system, it could be time to consider switching to one that is cloud based. ONGC Systems can advise your business on the best way to do this and talk you through the benefits of installing a more efficient cloud based phone system. Our most popular choice is the 3CX System – used by 30,000 companies globally, it is recognised for its cutting edge technology.
Switching from a trusted on-premises phone system may feel a little daunting, but it needn’t be. By using a virtual phone and interface, your company’s entire communications can be managed extremely easily, without the costly maintenance & hardware bills that an in-house system presents.
The Benefits of a Hosted Phone System
Upgrading to a cloud based system brings with it an array of benefits, and more so if you choose ONGC Systems to implement it for you. We can tailor the system to fit around your business as well as integrate mobiles and other devices that you may use.
- No maintenance or upgrade costs
- Access to low-cost IP calling
- Ability to make changes & moves instantly
- Enables your staff the flexibility to work remotely
- Access to call management features
- Provides reliability and complete security
- Integration with many 3rd party CRM applications such as Sales Force, Microsoft Dynamics and many more.
- Advanced reporting and cost centre management
- Call centre features
Why Choose ONGC Systems?
With a wealth of experience in the IT industry, we can advise you on the best system for your business.
Our team are on call 24/7 to ensure that your IT systems are always working effectively.
Unlike other companies, ONGC Systems will get to know your business and provide a service bespoke to you.


Software defined networking is the new concept in networking field. SDN transfers control a software plane known as a Controller after decoupling it from the hardware. This allows quick management of network movement by network administrators. An SDN controller acts as the brain of the network. It optimizes the functioning of a network, which in turn increases its efficiency. The central control layer in SDN switch adjusts the flow of information and the associated use of bandwidth. A high bandwidth SDN switch provides operators with increased flexibility and improved performance with simplified operations. It also monitors the traffic easily and efficiently to the underlying systems like switches, routers and other network gears. This helps network engineers respond easily to changing business need and adjust the flow of traffic without manipulating switches individually. SDN is growing as a major technology and its market has proved out to be fruitful for telecommunication providers. They have started looking out for ways to optimize the costs and increase the network efficiency of the available networks. Moreover, it provides high reliability in network functioning and programmable interfaces and switches which means scaling up or scaling down of network operations is easy. The main reason for this is that traffic load is adjusted quickly and cost-effectively. In today’s time, on one hand, gaps in network technology such as complexity, inability to scale up or scale down and vendor dependence are leading to slow growth, whereas, on the other hand, SDN seems to be the ray of hope. With the emergence of the new era that is more data-driven and application intensive, SDN is the answer to future progress. ============== I'm a certified networking associate with diverse knowledge in switching and routing. Please share feedback or question on this post.


There are 16,894 users registered with this service.
This service allows you to create a free SIP account on our linhome.org service. Once registered you will be able send instant messages and make audio and video calls to other SIP addresses using using the Linhome app. The sip.linhome.org service is powered by Flexisip proxy, deployed in high availability mode. This web portal is based on the Flexisip account manager software.
Register on our service
Get access to your account panel to configure it
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Data Jockey uses Jack for its audio output. Jack allows Data Jockey's users to easily route their audio output in a variety of ways.
There are currently 3 "audio outputs" for Data Jockey. Two stereo outputs "output" and "cue" and one mono output "measure".
Currently Data Jockey does not provide any way to manage Jack connections internally. You can use the external applications qjackctl or jack_connect for that.
Data Jockey's 2 stereo outputs both output the audio playback from Data Jockey. The main outputs "output0" and "output1" are intended to be used as the primary listening output. The "cue" outputs "cue0" and "cue1" are intended to be used to preview audio before it is output on the main outputs and presented to the audience.
Each mixer has a 'cue' button which determines the output destination, "cue" or "output".
Here is the cue button in its "cueing" state. The mixer associated with this cue button will be sending its audio to the "cue" outputs.
Here is the cue button in its "inactive", "not cueing" state. The mixer associated with this button will be sending its audio to the main outputs.
The "measure" output is an audio rate ramp which counts from 0 to 1 over 4 beats. This allows users to synchronize external, jack enabled, applications, in tempo, with Data Jockey. Eventually Data Jockey will provide other avenues for external synchronization.


Smart meter plans filed with the PSC
SMECO submitted a filing with the Maryland Public Service Commission (PSC) in June outlining the cooperative’s plan to replace existing electric meters with smart meters.
Smart meters measure energy use like standard meters, but smart meters are capable of two-way communication. They send energy usage information to the utility every day, and they send alerts when the power is out
or when voltage is too low or too high.
In March 2011, SMECO installed smart meters at 900 homes and businesses in a St. Charles neighborhood in Waldorf. About 1,000 smart meters have also been installed at the Patuxent River Naval Air Station, Webster Field, and the Navy's Solomons Recreation Center as part of the Navy’s privatization agreement.
Smart meters can help save money by reducing operational expenses because the cooperative will no longer have to send meter readers to homes and businesses every month to read the electric meter. Austin J. Slater, Jr., SMECO president and CEO, explained, “Having 15–17 people on the road every day driving around reading meters is going to be a thing of the past. As a co-op, everything we do is for our members, and now that we have proven technology that is safe, reliable, secure, and cost-effective, we want to move forward.”
To transmit data and communicate with the smart meters, SMECO uses the Sensus Flexnet system, a technology that relies on base stations which are located in SMECO’s substations. Slater said, “For the past year, we’ve been running the system through its paces. On average, SMECO contacts about 99 percent of the meters remotely for daily meter readings. Work that used to require 50 man-hours can now be accomplished in less than 10 minutes." He added, “Using up-to-date technology will make us more effective. We will be able to respond to power outages more quickly and efficiently. And after power is restored, we can use smart meters to verify that all customers in an area have their power back on.”
In the filing submitted to the PSC, SMECO outlined a schedule for full deployment of smart meters. Upon PSC approval of the Co-op’s plans, SMECO will select a company to install the smart meters. Installations will ramp up to approximately 10,000 meters per month, with the majority of smart meters being installed between June 2013 and May 2014.
David Johnson, SMECO’s Meter Operations Manager, has been working on this project since its inception about three years ago. “We’ve explored all of our options. We've completed cost-benefit studies. We’ve tested the technology. We are going to hit the ground running.” Johnson explained further, “Smart meters are part of our overall efforts to improve reliability for the long term. Customers won’t notice any immediate changes after their smart meter is installed. They won't see a meter reader every month, but they will continue to get their monthly bill like they do now.”
In addition to the schedule for full-scale deployment of smart meters, SMECO’s PSC filing outlines plans for a website that customers can use to access their energy use information. According to Johnson, “We are planning to provide daily updates to give customers information about their energy use that is easy for them to understand. If they want to actively manage their energy budget, they will have the tools they need.”
“Customers frequently call the Co-op because they believe their monthly bill is too high,” said Rose Pickeral-Brown, SMECO’s Contact Center Manager. “And it’s difficult for them to understand their bill if the only piece of information they have is a monthly meter reading.” She said she looks forward to improving the level of customer service the Contact Center Representatives can provide. Brown added, “When we have smart meters deployed throughout our system and the website is active, customers will be able to see how much energy they use every day. If they understand how their energy use impacts their bill, they will be able to learn how to save energy so they can save money. These improvements in technology will help us to improve our customer service.”


Applications Of Miniature Micro Switch
Miniature micro switch’s application closely connects to the change of electrical devices. It can be customized into different designs as various actuators and terminals are available. Specifically, plenty of electronic devices can be found in the application of miniature micro switches. Telephone, air-conditioner, timer, fax machine, game controller, pump, gas detector, money sorter, juice extractor, lighting equipment, etc., are the detailed micro switch application.
Most waterproof micro switches have the feature of being IP67 rated. It is widely applied in all kinds of machines and equipment for its irreplaceable role in control systems, such as washing machines, refrigerators, etc.
There is one application we have to mention, which is a micro switch application for automobile control. It is one of the most critical applications for automobile control, such as in window control systems, gear control systems, sunroof control systems, etc.
The G6 series of miniature micro switches developed by Unionwell has the features of small compact size, long life, and various operating levers and terminals.
For more information, please visit our website: www.unionwellswitch.com.
Unionwell has a different series micro switch, such as the G3 series micro switch, G5W series, G9 series micro switch, etc.; all these micro switches can be waterproof. They are manufactured with stricter quality control than other electrical switches. These waterproof micro switches can be customized and manufactured for OEM customers if the quantity reaches the amount.
We are a professional micro switch supplier, manufacturer, and factory dedicated to producing the best quality waterproof micro switches for clients worldwide. Welcome to contact us if you have relevant requirements.


IBM is expanding its flash storage lineup to power cloud data centers that carry out so-called cognitive computing.
The company’s newest FlashSystem arrays, introduced Wednesday, combine its fast and relatively affordable FlashCore technology with a scale-out architecture designed to be easy to expand.
Cognitive computing, which IBM defines as real-time data analysis for immediate, automated decision-making, is at the heart of much of IBM’s current technology push for enterprises and service providers. Its Watson technology is the star of the show but only the most visible part of what the company is doing in this space. An example of cognitive computing is a mobile operator analyzing information about phone call quality to make decisions on the fly about changes in the network, said Andy Walls, an IBM Fellow and CTO for flash systems.


After years of flame sensing research and development, Optect has developed the world's first optically enhanced long range flame detector.
Optect's IR3 detector is ideal for those looking to cover large areas from a single device or detect ultra-small fires. For perspective, a single candle flame is detectable at 20m.
IR3 Flame Detection Now At Long Range
1ft x 1ft industry standard heptane pan fire detection limits:
5 second data assessment time: 500m
60 second data assessment time: 1000m
Why Optect's Flame Sensor
Flame sensors can detect fires in under 5 seconds. Optect has extended this capability for long range applications.
IR3 flame detectors are inherently reliable. With two rejection channels and one positive ID channel, they are known to have false alarm rates of less than 1 in 15 years. Optect has developed advanced new false alarm suppression techniques to further increase the reliability.
Energy and Data Efficient
Optect's device can be powered with a small PV panel and battery. Alarm signals can be sent over standard relays and RS-485 connections or low bandwidth license free radio networks.
Protection of Power Lines
Installed every km
Devices are attached every km, covering the area under the power lines and nearby forested areas. They have their own power and telecommunication system that works even when power and cell networks are down.
Instant fire detection
For early warnings of:
Fires approaching power lines
Fires starting underneath power lines
Fires starting near power lines
The system detects:
Number of sensors triggered and direction of travel
Local atmospheric conditions
High reliability means resources can be committed immediately, so even the most dangerous fires can be stopped before they grow out of control.
OPTECT PROVIDES CLARITY IN TIMES OF CHAOS
Every Minute Counts
Evacuate faster and more efficiently
Catch fires early and prevent large scale damage
Wildfire mitigation reduces the cost of insurance and subsequent claims.
OPTECT WINS LIFE SAVING SOLUTION OF THE YEAR AWARD
We are currently accepting partners for our pilot program , Get in Touch to Find Out More


Main / Arcade / Firmata python
Name: Firmata python
File size: 396mb
Python interface for the Firmata (dougcoxandsamhurrie.com) protocol. It is compliant with Firmata Any help with updating to is welcome. The Capability Query is. To combine Raspberry Pi with an Arduino, you can use the Firmata protocol with Python bindings. Firmata is a serial communication protocol that can control the. 27 Apr Included in the repository with the Circuit Playground Firmata sketch is a set of Python code to talk to Circuit Playground Firmata. This code.
12 Aug LinkIt Smart Duo development board supports Arduino IDE v and Python Firmata protocol requires implementation on the MPU. Talking to Arduino over a serial interface is pretty trivial in Python. On Unix-like systems you can Python interface for the Firmata protocol. It is compliant with. 7 Dec Returns a version tuple (major, minor) for the firmata firmware on the If you install from source with python dougcoxandsamhurrie.com install, don't forget to.
14 Aug This worked rather well, though I don't have a slick GUI for it yet. pyFirmata is the magic that allows an Arduino running Firmata to talk to Python. 25 Jan communication between raspberry pi and arduino via usb #firmata #python . Arduino running Firmata to talk to Python. run this commands in. I have the impression that your serial communication to arduino is not working. I cannot see where and how you open the serial port and the. pySerial is a simple library that provides a bridge between Arduino and Python via a serial port, but it lacks any support for the Firmata protocol. As mentioned. 25 Jan In this tutorial, a python script on a Raspberry Pi controls an LEDs brightness then Firmata, then Standard Firmata (see screenshot below).
28 Oct After writing Raspberry Pi, Python & Arduino *and* a GUI (which Firmata can drive hobby servos, and if you're not driving too many, you can. Learning About Arduino and Python. Python + Firmata Install. Install Python dependencies: $ easy_install pyserial. Download python-firmata from github. 6 Sep -Example code that we will study below -> Python & Arduino The first-time setup requires the uploading of a Firmata program to the board. 20 Sep This post show steps to install pyFirmata, and also python-serial, on Raspberry Pi . Such that we can program Arduino Uno (with.


Acronyms – IMEI USSD GSM 2G GPRS EDGE 3G UMTS HSPA HSDPA 4G LTE WIMAXBANDWIDTH
All mobile phones and modems have a unique 15-digit identifier (not serial or model number) known as an IMEI number which is printed on a label on or inside the device (a phone’s may be under the battery) and also the box it came in. A phone IMEI can be found using the retrieval code *#06#; USB modem dashboards may show the IMEI in Diagnostics.
This is a unique number that identifies a GSM or UMTS mobile network SIM subscriber number. MSISDN is the full telephone number including international code for the SIM card in a mobile or cell phone. e.g. Sending *110# will retrieve the MSISDN for a Laos cell phone.
USSD (Unstructured Supplementary Service Data) is a real-time or instant messaging phone services for use with all GSM networks. USSD messages are sent from a GSM mobile or 3G modem using an asterisk * followed by a numeric sequence and ended with a hash or pound sign #. e.g. *122# will get an almost immediate reply with the credit balance for a Lao mobile device. Different operators in other countries may use their own individual USSD codes.
USSD is also a menu option on a USB 3G modem user ‘dashboard’ and can be used to query account credit, data balance, account refill and receiving instant replies. Response time for interactive USSD-based services is usually much quicker than the SMS text message method which may also be used by mobile network services.
G preceded by a number stands for Generation and is related to data transmission speeds. Various definitions exist and the “G” number has become a marketing ploy used by mobile internet providers to exaggerate their performance claims. Possible data speeds and those achieved in reality differ greatly. Many factors will affect performance and the time it takes to download a file from a server. Throttling by the operator, traffic density, upstream provider networks, server load and more. What some call 3G, 3.5G or 3.75G may actually be faster than what others claim as 4G which is capable in theory of 300 Mbps. ‘5G’ may not be needed for the foreseeable future.
Here’s a 7-minute video ‘lesson’ explaining how 1G evolved into 4G and the differences between 3G and 4G. Now a couple of years old, the information is still current:
1G Analog cellular technology for voice and limited data transmission
2G – Digital narrowband circuit data (TDMA, CDMA) 9.6 -14.4 Kbps
2.5G – Packet data on a 2G network (GPRS) 20-40 Kpbs, EDGE – an evolution of GPRS
3G – Digital broadband packet data (3.1 Mbps CDMA; 500-700 Kbps UMTS, HSPA, HSPA+, WCDMA
3.5G – EDGE upgraded to HSPA 1-3 Mbps and HSDPA 2-7.2 Mbps (peak 14.4 Mbps)
4G – Digital broadband packet data ALL IP including VoIP; typical 3-5 Mbps (peak 100 Mbps) includes WiFi, WiMAX and LTE, an evolution of UMTS with possible 300 Mbps
5G – not fully defined or in service, 100 Mbps to 1 Gbps and higher speeds.
A Global System for Mobile Communications (GSM) initiative to deliver high speed packet data services to mobile terminals. GPRS allows many users to share the same channel and allows users to stay virtually ‘on line’ all of the time; radio resources are used only when data is actually being transmitted or received. Call setup is almost instantaneous and users may be charged on the basis of actual data transmitted, rather than connection time. Sometimes defined as GSM Packet Radio Service.
A technology (also known as GSM++) that allows GSM (see above) operators to use existing frequency bands to offer wireless multimedia IP-based services and applications at speeds of 384 kbps with a bit-rate of 48 kbps per timeslot and up to 69.2 kbps per timeslot under ideal radio conditions. (A more realistic theoretical limit is 59.2 kbps per timeslot). The 384 kbps prediction is from an International Telecommunication Union (ITU)-defined objective in the ITU2000 standard. EDGE is fully based on GSM and requires relatively small changes to network hardware and software. For example, EDGE uses the same time division multiple access (TDMA) frame structure, logic channel, and 200-kHz carrier bandwidth as today’s GSM networks, allowing existing cell plans to remain intact. Formerly called Enhanced Data rate for GSM Evolution. Put simply, when you connect to the internet via your mobile phone, if EDGE is available, data download to your phone will be faster than standard GPRS. In theory EDGE is twice the speed of standard GPRS. You might see a small icon on your phone screen that indicates that GPRS and/or EDGE is operating. There’s no need to add special settings to your connection.
The main difference between 2G and 3G wireless is the rate at which data can be transferred. Planned rates are: 144 kbps or higher in high mobility (vehicular) traffic, 384 kbps for pedestrian traffic, and 2 Mbps or higher in fixed applications or for indoor traffic. The EDGE (Enhanced Data rates for Global Evolution) air interface was developed specifically to meet the bandwidth needs of 3G.
3.5G – HSDPA (High-Speed Downlink Packet Access) allows up to 7.2 Mbps or 14.4 Mbps. HSDPA is 5 times faster than EDGE and 10 times faster than GPRS. Access is by an operator SIM inserted into a phone, tablet, laptop or notebook computer, otherwise using a USB air card or dongle.
HSPA (High-Speed Packet Access) and HSPA+ HSPA allows downloads up to 14 megabits per second (Mbps) and uploads at 5.8 Mbps. Best selection of Cannabis seeds for sale. HSPA optimises WCDMA radio bandwidth by increasing the transmission rate, sharing channel transmission, shortening the time between transmission intervals, and improving the modulation and amplitude of the signal.
HSPA+ is faster and more efficient – up to 56 Mbps and peak uploads of 22 Mbps; it can also operate on an all-Internet protocol (IP) architecture.
4G – Wi-Fi, WiMAX, LTE 10-100 Mbps; 4G provides a comprehensive and secure IP-based mobile broadband solution to laptop computer wireless modems, smartphones, and other mobile devices. 25/26 MHz (2.5/2.6 GHz) frequency bands are common in Europe and Asia, while 700 MHz is used on most of the American continent. Traveling on two wheels gets us closer to life in Vietnam and to the outgoing and welcoming Vietnamese who share our love affair with the bicycle www.vietnambiking.net.
The two main 4G technologies are WiMax and LTE. From August 2011, Planet Online offered 4G in Laos with Mobile WiMax and Lao Telecom introduced LTE in 2013 to the capital. Korea and Singapore also have 4G LTE. However it was still relatively new in the UK during 2014 and available only in larger cities.
In reality, 4G can be used more a marketing term for faster-than-3G systems, and for devices capable of between 7.2 and 21 Mbps – if the operator is providing the service. A 4G USB modem will not perform any better than a 3.6 Mbps model if actual download speeds are below that due to network congestion or ISP throttling. Visit http://jerseyhotels.co to find out more regarding jersey hotels, cheap jersey holidays, hotels in jersey, jersey hotels channel islands, hotels in jersey.
Wi-Fi uses unlicensed spectrum to provide access to a local network within 100 metres. Choose Our Superior Office Window Cleaning Services A clean work environment is vital to health and wellbeing of those who inhabit it. One of the most important aspects of maintaining clean, healthy and luxurious surroundings is to keep windows clea professional window cleaners. The purpose of this article is to help you come to the right decision by outlining the importance of using professional window cleaning services. Here are the reasons why using our professional services is the better choice. We Have Highly skillful. WiFi can be used to complement a WiMax installation by extending local coverage within a building and can be included in 4G.
WiMAX is a version of wifi that is capable of covering many square kilometres and uses licensed or unlicensed spectrum to deliver connection to a network, in most cases the Internet.4G vs 4G LTE
Image shows LTE (Long Term Evolution) compared to WiMax as offered by the major providers in the US.
5G – Gigabit per second – for the future: >1 Gbps (term has not been adopted yet)


The power of connection
Welcome to Helipower Engineering. We are a turnkey telecommunications company that build wireless communications and broadcast network infrastructure.
Reliable network infrastructure
Helipower is a wireless communications and broadcast network infrastructure provider. We build reliable infrastructure, helping our clients consistently deploy powerful technology across their networks to deliver world-class services to their customers, day in and day out
Lattice mast, monopole, and mono lattice that can be adapted to client specification.
Tree mast, lamp post, billboards, and JoJo tanks that can be adapted to client specification.
Earthworks, mast foundation structures, plinths, plinth earthing, and BTS brick buildings.
Installation of DC & AC systems, cowling’s installations, BTS systems, battery installations & replacements.
Roof Top Installations
RF, road closures and crane lifts
Setting up temporary sites and temporary tower sites.
Antenna Installations, Co- Axe Feeders, Triplexers, TMA’s.
Professional support services
Helipower Engineering provides a number of professional support services to accommodate client needs and facilitate the completion of projects within the allocated time and budget.
Full turnkey project management, site acquisition, surveys, design and draughting services.
For all tower upgrades solutions.
Electrical installations, maintenance and corrections.
Vandalism protection projects, we advise appropriate possible solutions for the client. We also fix and improve vandalism cases.
By the numbers
Helipower Engineering started building greenfield sites in 2004. Since then we have maintained a high level of quality during all site builds and due to our wealth of knowledge and experience became the preferred contractor for the adjudication of difficult sites.
These sites presented challenges in the form of access restrictions, distance from suppliers and normal construction processes. We completed several of these sites throughout Gauteng, Limpopo, and Mpumalanga while maintaining quality and safety standards.
Certifications & Accreditations
Our certifications are symbolic of our promise to provide our customers with quality services in a safe and compliant manner. We are committed to sustainability and operating in a manner that is respectful of the environment.
Helipower Engineering has been awarded, and successfully retained, ISO 9001 accreditation by TÜV Rheinland Inspection Services (Pty) Ltd, NOSA Vodacom Vetted.
Helipower is also a Level Two BBBEE contributor and is committed to economic transformation.


Ipsec and vpn
A virtual private network (vpn) provides a means by which remote computers communicate securely across a public wan such as the internet a vpn connection can link two lans (site-to-site vpn) or a remote dial-up user and a lan the traffic that flows between these two points passes through shared . The two basic forms of ipsec vpn connection models -- site-to-site and client-to-site vpn topologies -- are explained. Hello everyone i just need small clarification for difference between ipsec and vpn are they same can some one explain in detail 102352.
If you want to securely extend your network to remote users, or knit together branch offices into a single virtual network, ipsec vpn is the tool you need. In computing, internet protocol security (ipsec) is a secure network protocol suite that authenticates and encrypts the packets of data sent over an ipv4 network the initial ipv4 suite was developed with so few security provisions that the ip version was incomplete, open or left for further research developm. Ipsec is most commonly used in so-called tunnel mode with a virtual private network (vpn) however, ipsec also supports a transport mode for direct connection between two computers however, ipsec also supports a transport mode for direct connection between two computers.
It can be quite cost-effective to use ipsec vpn services in highly dispersed organizations with lots of small locations, such as retail chain. Configure a site-to-site ipsec vpn that allows access to the remote endpoint via ssl vpn. Infosec pros need to know the ins and outs of ssl vpns and ipsec vpns to compare key enterprise features for their organization. Re: difference between webvpn, ssl vpn and ipsec client thank you very much for your answer sounds like the ssl client is the right choice for us, since our users have a lot of 3rd party software they need to use.
Configure a site-to-site ipsec vpn tunnel between a fortigate 90d and a cisco asa 5505. Ipsec (ip security) is a set of protocols developed by the ietf to support secure exchange of packets at the ip layer it is widely used to implement vpns. Ipsec’s protocol objective is to provide security services for ip packets such as encrypting sensitive data, authentication, protection against replay and data confidentiality as outlined in our ipsec protocol article, encapsulating security payload (esp) and authentication header (ah) are the . Scripts to build your own ipsec vpn server, with ipsec/l2tp and cisco ipsec on ubuntu, debian and centos - hwdsl2/setup-ipsec-vpn.
Ipsec and vpn
Ssl vpn is generally used to make the connection for remote user using ssl vpn clinet eg if someone wants to connect their work location or wants to access the server of their company from any location or from home they can access through ssl vp. Compare pptp, l2tp/ipsec and openvpn to determine which vpn protocol offers the best combination of security, speed and ease of use for your needs. Discusses how to configure an l2tp/ipsec server behind a nat-t device in windows vista and in windows server 2008 /ipsec connection to the vpn server .
- Ipsec vs ssl compares and contrasts internet protocol security (ipsec) virtual private networks (vpn) with secure sockets layer (ssl).
- Ipsec arrived first on the scene and still rules site-to-site vpns, but ssl has won converts on the remote access side thanks to its relative simplicity.
Learn about what a vpn gateway is and the ways you can use a vpn gateway to connect to azure virtual networks including ipsec/ike site-to-site cross-premises and vnet-to-vnet solutions, as well as point-to-site vpn. Ssl vpn vs ipsec vpn with the evolution of the networking technologies, networks were expanded in both private and public aspects these public and private networks communicate with different types of networks belonging to different sectors such as businesses, government agencies, individuals etc. Ipsec traffic and tutorial - vpn tutorial ipsec ipsec which works at the network layer is a framework consisting of protocols and algorithms for protecting data through an un-trusted network such as the internet. This demo walks through the purpose and workings of an ipsec vpn tunnel, including implementation and verification of the tunnel enjoy.


- Product catagoryVideo Wall
- Product description1. LCD splicing screen is the most stable and reliable display device, because the heat is very small, the device is very stable. 2. LCD splicing screen resolution is high, the screen is bright, the resolution can easily reach and exceed the HD standard. 3. Widely used in the major shopping malls, exhibition hall, can experience multi-screen color and style.
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For most businesses having a reliable internet connection is essential.
Whether you want to upload and download files, carry out competitor research or sell online we can give you the best solution. For larger clients this might include converting to leased lines. There are many options on the market and we can supply you with a suitable firewall to protect your company.
Delivered through a standard telephone line. Cheap to run, but slow in comparison to today’s alternative solutions. The benefit of ADSL is it is quick to setup and you can use just one line for voice & internet.
FTTC (Fibre to the cabinet). Commonly known as ‘BT Infinity’ or ‘SuperFast Fibre’
This is where optical fibre has been laid to the green cabinet out on the street. The remaining distance from the cabinet to your premises is carried over copper reaching speeds up to 80Mb, this is an extremely attractive option to businesses.
Leased Lines – also known as FTTP (Fibre To The Premise)
Here the Fibre is connected directly from the exchange directly into your premises. You can benefit from speeds up to 10 Gbps with guaranteed speed both downloading and uploading. Of course, these all come with the highest service levels. Leased Lines come with SLA’s and are always uncontended.
Abbey Support are able to deliver the internet where no standard service can. We have the capabilities of installing a Satellite internet connection to provide an internet connection in the most remote of locations. All you need to provide is a clear line of site to the South from your premises, we can then install the satellite dish and connect you up to an internet connection delivered via Satellites.
4G & 5G Internet
There are times when traditional services can’t run a cable to your premises. In these instances Abbey Support can provide a router capable of delivering internet through the 4G (and 5G where available) networks.
Line Of Site Connections
If you want to expand your current internet provision into an adjacent building then Abbey Support can install a wireless bridge to share the connection, quickly, securely & wirelessly between the buildings.
Whatever your situation, contact Abbey Support to find out how we can deliver the internet to your business.


IoT Smart Spaces
Creating smart spaces nowadays means taking advantage of a variety of technologies, choosing the most suitable ones, and binding them to one ecosystem.
Our smart office
Join us on the journey to build our smart office!
Creating smart spaces nowadays means taking advantage of a variety of technologies, choosing the most suitable ones, and binding them to one ecosystem. With the help of cloud services, we can receive useful data (information about lights, temperature, CO2 concentration) and react to its changes from anywhere. That’s what the ‘IoT Smart Spaces’ project is about, and we’ve implemented it in our isolutions Barcelona office.
Real-time display and database storage
Benefits of data collection
After successfully obtaining the data, we can display it in real-time or/and store it in a database (CosmosDB in our case). As a serverless streaming analytics tool, we use Azure Stream Analytic Job. It was configured to get data from IoT Hub, run a SQL-like query, and generate an output that can be used as input for other tools. As an example, we have filtered S1 sensor data into a separate output that is used later in PowerBI for creating a live dashboard.
Gateways are connected to our network and use the internet to send filtered Bluetooth packets to the IoT platform in the cloud via messaging transport protocol MQTT. As a cloud solution, we use Azure IoT Hub. And for a secure connection between gateways and our cloud service a signed certificate was created
Also part of the project
Apart from these sensors, we can also control light switches by triggering an Azure function, manage air conditioners through a web and a mobile application, and control plant watering.
Overall, IoT Smart Spaces can be customized according to clients’ needs in many ways. The core idea is to use cloud services along with a lot of smart devices to add security, optimize energy consumption and simply bring comfort to any space. In addition, it is a perfect opportunity to gain knowledge and experience in cloud technologies as well as get to know better the full cycle of a software solution.
However challenging sometimes it might be, it is exciting to take part in the implementation of this project in the isolutions office in Barcelona.


The SC article focuses on the "Fishbowl" phones designed by the NSA and includes a number of interesting comments on the state of security implementations provided by vendors. It mentions that the NSA was looking to use SSL VPNs but due to a lack of interoperability wound up using IPSEC instead. Similarly they were looking to use DTLS-SRTP, but didn't find the implementations and so instead used "descriptions". The article has this excellent statement by Salter (my emphasis added):
Salter said the security specifications, such as those sought for the voice application, would be useful to everyone.
She urged colleagues to demand vendors improve unified communications interoperability.
“We need to send a message [about] standards, interoperability and plug and play," she said.
This need for interoperability and standards support was certainly one of the themes I tried to bring out in the book. It is indeed critical for the long term success of securing unified communications systems.
I also found it interesting that the NSA encrypts the voice twice:
Voice calls are encrypted twice in accordance with NSA policy, using IPSEC and SRTP, meaning a failure requires “two independent bad things to happen,” Salter said.
While there certainly is value in having multiple layers of security, I do wonder what this means in terms of computational overhead and/or latency. As our mobile phones have become more powerful, perhaps this is no longer a major concern.
Separate from the article, I was intrigued to read over on the NSA Mobility Program page that the first document they are releasing is the "Enterprise Mobility Architecture for Secure Voice over Internet Protocol (SVoIP)". From the page:
The first Mobility Capability document to be released is the initial draft release of the Enterprise Mobility Architecture for Secure Voice over Internet Protocol (SVoIP). It is intended to be a living reference that will be updated to keep pace with technology and policies as they change over time, as additional security products and services are developed, and as lessons learned from early adopters of this architecture are applied. As a first step, this version contains guidance on the required procedures necessary to build and implement a SVoIP capability using commercial grade cellular mobile devices. Future releases will build on this architecture and will include mobile device management and data applications; and ultimately integrate the WIFI service with an expanded list of end devices.
The 100+ page PDF file looks to be a fairly comprehensive view into what is involved with rolling out a secure mobile communications solution. It's great to see this from the NSA and it is a great contribution to the ongoing efforts to secure VoIP communications.


Futronic FS84 ethernet Fingerprint Authentication Module (eFAM)
combines both high performance fingerprint scanner and recognition
engine into one device. It has internal memory that can store up to
2500 fingerprint templates.
Any host system can control the FS84 via standard Ethernet interface
to enroll finger and recognize finger. The recognition result will be
sent from FS84 to the host.
4 wires serial interface is also available. So FS84 can be used for
both embedded and remote fingerprint recognition application.
Fingerprint images and templates can be transferred between FS84 and
host system via serial and ethernet interface.
FS84 has 1 output channel (for external relay control) and 2 input
channels (for door sensor and switch). So it can be used as a
fingerprint access control device.
Futronic provides development tools to customer free of charge for
integrating the FS84 with any host system.
Futronic FS84 Ethernet Fingerprint Module Features
(1) These operating systems are supported by Neurotechnology
Light source: Infrared LED
4 wires serial interface, VCC, GND, TX and RX. Speed up to
Ethernet communication speed: 10M
Supply voltage: 12V. Max current consumption: 250mA
1 output and 2 input channels for controlling external devices
2 output channels for controlling external LEDs
ESD: contact 8KV and air discharge 16KV no permanent damage
The Futronic FS88 USB 2.0 Reader is compatible with many different
development kits and applications. Below is the list of products
that are currently known to support this scanner. Please note
that some applications and development kits require specific versions
of the drivers to be installed. Please contact us if you need


Calendly’s Prelude + Slack
Slack is a messaging app for business that connects people to the information they need. By bringing people together to work as one unified team, Slack transforms the way organizations communicate. Slack helps you work in a more connected, flexible, and inclusive way.
Prelude integrates directly with Slack, allowing you to send Slack messages to your interview teams directly from Prelude. With the integration, you can create a new Slack channel or send messages to an existing Slack channel, all without leaving Prelude.
Features + Benefits
HOW IT WORKS
See It In Action
Better together: Calendly's Prelude + Slack


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The Guardian Angel (™) by e-Paz group is part I of a software suite designed to provide you with premium personal protection using the latest cellular and mobile software technologies.
Our application provides the means to report a personal emergency incident to a list of pre-configured contacts and provide them with your exact location using various technologies.
Whether you are a parent taking care of your children or taking care of your elderly parents that have grown old and require assistance, personal emergencies can occur at the most unexpected moments and circumstances, our software provides you with valuable information just when you need it most.
With Guardian Angel (™) by e-Paz group you can be alerted in real-time when an emergency occurs, you can dispatch emergency services and be aware of the exact physical location with GPS and advanced location services, text messages, hyperlinks and emergency voice phone calls.
Our vision is to provide premium safety solutions worldwide at an affordable price tag.
Please note: in order to be able to track your contacts on demand, the Guardian Angel application must be combined with an instalation of our Guardian Angel Observer complementary application which is available for download.


An Internet Protocol address (IP address) is a layer 3 logical address assigned by a network administrator. IP addresses are used to identify specific devices on a network.
An IP address is a 32-bit binary address usually written in dotted decimal formats. These 32 bits are further subdivided into four 8 bit segments called octets. Each octet is separated by a period.
AlsoRead: OSI Model 7 Layers Explained
Every IP address can be broken down into two main portions.
- Network Address Portion (Network ID)
- Host Address Portion (Host ID)
Network address portion is used to identify a specific network. Routers maintain routing tables that contain the network addresses. Host address portion is used to identify a specific endpoint on a network such as servers, printers, computers, mobile phones, etc… (Please Note – Routers build their routing tables based on network address not based on Host addresses.)
Address Classes/Classful Networks
This is a network addressing architecture used
This method divides IPv4 address space into five classes.
- Class A
- Class B
- Class C
- Class D
- Class E
These Address classes were determined and allocated by the Internet Assigned Numbers Authority (IANA)
In Class A addresses first bit of the first octet is always set to Zero.
00000000 – 01111111
Therefore in Class A addresses the first octet ranges from 0 – 127.
0.0.0.0 – 127.255.255.255
But 127 is reserved for loopback IP addresses. As an example, you can’t configure an IP address of 127.0.0.1 as a static IP on a PC. 0 is reserved for default network. So that can’t be used either to configure an IP address on a PC. As an example, you can’t configure an IP address
Because of the above-mentioned reasons the actual range of Class A
22.214.171.124 – 126.96.36.199
In a Class A Address the first 8 Bits denotes the Network Portion and the last 24 Bits denotes the Host Portion.
In Class B addresses first two bit of the first octet is always set to 10. (One and Zero).
10000000 – 10111111
Therefore in Class B addresses the first octet ranges from 128 – 191.
188.8.131.52 – 184.108.40.206
In a Class B Address the first 16 Bits denotes the Network Portion and the last 16 Bits denotes the Host Portion.
In the first octet of Class C addresses first 3 Bits are set to 110. (One One Zero)
11000000 – 11011111
Therefore in Class C addresses the first octet ranges from 192 – 223.
192.0.0.0 – 220.127.116.11
In a Class C Address the first 24 Bits denotes the Network Portion and the last 8 Bits denotes the Host Portion.
In Class D addresses the very first four bits of the first octet are set to 1110. (One One One and Zero)
11100000 – 11101111
Therefore in Class D addresses the first octet ranges from 224 – 239.
18.104.22.168 – 22.214.171.124
These addresses are reserved for Multi casting. In multi casting data is not transmit for a particular host. Therefore it’s not necessary to extract host address from the IP address.
Class E is reserved for experimental purposes.
In Class E addresses the very first four bits of the first octet are set to 1111. (One One One and One)
11110000 – 11111110
Therefore in Class E addresses the first octet ranges from 240 – 254.
240.0.0.0 – 254.255.255.254


1.Two-channel XLR audio adaptor, specially designed for Blackmagic Cinema Camera
2.Professional audio devices such as XLR microphones, wireless mics, boom mics and mixing boards may be connected to the camera via this adaptor.
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TDRS M Atlas V Launch
August 3 @ 8:40 AM EDTFree
A United Launch Alliance Atlas 5 rocket, designated AV-075, will launch the TDRS M communications and data relay satellite for NASA. The Tracking and Data Relay Satellite System (TDRSS) connects mission control with the International Space Station and other orbiting satellites. The rocket will fly in the 401 vehicle configuration with a four-meter fairing, no solid rocket boosters and a single-engine Centaur upper stage.
Launch window: 8:40 a.m. EDT (1240 GMT)


Depends on input structure and internal cancellation circuits. It is the ratio of the input voltage to input current. Idealopampcircuits georgia institute of technology. Since the lm741ne741ua741 opamps are the most popular one, this tutorial is direct associated with this particular type. And as you will see, a little later on, there is no such thing as an ideal opamp. A nonzero dc voltage present between the two input di.
An opamp has two inputs and it amplifies the voltage difference between those two inputs. Operational amplifiers are linear devices that have all the properties required for. Two of the characteristics can be attributed to the internal compensation capacitor of the 741 op amp. In this experiment, the input bias current, output offset voltage, slew rate and power bandwidth will be measured or calculated and compared to the rated values in the manufacturers data sheets. Closedloop gain of 200 46 db, openloop gain of op amp is 10,000 80 db. Also, an ideal op amp has zero gain for signals common to both inputs, that is, common mode cm signals. A real opamp may be modeled with noninfinite or nonzero parameters using equivalent resistors and capacitors in the opamp model. The nonideal characteristics of real op amps fall into three. Similarly, a circuit is said to be nonlinear, if there exists a nonlinear relationship between its input and output opamps can be used in both linear and nonlinear applications. Operational amplifiers basics, characteristics, types and. This note explains the design of following amplifiers.
Operational amplifier circuits as computational devices so far we have explored the use of op amps to multiply a signal by a constant. This chapter discusses the characteristics and types of opamps. For most practical opamps the open loop dc gain a is extremely high. Ideal op amps will have infinite voltage gain, infinitely high impedance, zero output impedance, its gain is independent of. But there will be a few pico ampere current leakages in most op amps. R1 and for the non inverting amplifier the multiplication constant is the gain r2. Ideal opamp circuits, summing amplifiers, differential amplifiers,opamp difrentiators, opamp integrators, low pass amplifiers, high pass amplifiers and characteristics of physical opamps, effects of finite gain and bandwidth, effects of finite input resistance, effects of nonzero output resistance, output waveform. The input impedance of the noninverting amplifier is the input impedance of the op amps input. Operational amplifier basics opamp tutorial electronicstutorials. Circuits with operational amplifiers can be designed to operate in both of. An opamp consists of differential amplifiers, a level translator and an output stage. The bandwidth of practical op amp is very small value. Other includes, a fully differential amplifier which is.
Since most of the circuits dealing with operational amplifiers are voltage. Some opamps have open loop gain values as high as 108 v ovi. A circuit is said to be linear, if there exists a linear relationship between its input and the output. It should be infinite without any leakage of current from the supply to the inputs. Voltage follower this is a special case of the noninverting amplifier with r in. Towards the end of this tutorial note data are presented for a number of other popular general purpose operational ampli ers. In this tutorial dave explains what operational amplifiers opamps are and how they work.
Zero output impedance n the ideal opamp acts as a perfect internal voltage source with no internal resistance g this internal resistance is in series with the load, reducing the output voltage available to the load g real opamps have outputimpedance in the 10020. The concepts of negative feedback, open loop gain, virtual grounds and opamp action. An ideal op amp will display the following characeristics, of which are all explained in detail below. So, an ideal op amp is defined as, a differential amplifier with infinite open loop gain, infinite input resistance and zero output resistance. Operational amplifier configurations cse 577 spring 2011 mixed signal chip design lab jaehyun lim, kyusun choi department of computer science and engineering the pennsylvania state university. Figure 1 shows a typical rf amplifier connection, while figure 2 and figure 3 show an ideal op amp, either current or voltage feedback, connected for noninvertingand inverting gains, respectively. That is, the zero output is obtained for the non zero differential input voltage only.
Oa11 a tutorial on applying op amps to rf applications. The circuit configuration is designed to achieve an ideal opamp as closely as possible. Linked are the datasheet and spice model for the lm741c opamp, which you should. Free operational amplifiers books download ebooks online. The cable connecting these circuits has a characteristic impedance of 75 to. Introduction op amp topologies op amp structures op amp.
The open loop voltage gain a 0 is maximum and finite, typical value for practical opamp is considered to be 200,000. The two ideal op amp circuits assume that the source is coming from a ground referenced, zero. The basic opamp construction is of a 3terminal device, with 2inputs and 1output, excluding power connections. A differential amplifier with very high voltage gain. Voltage follower this is a special case of the noninverting amplifier with rin. To illustrate the operation of the modular op amp macromodel the values of the block parameters are calculated for the ua741 op amp and used in a series of example simulations. The operational amplifier, its a type of amplifier. This allows us to build frequency dependant amplifiers nd will be covered in more detail in later tutorials. The operational amplifier, or opamp as it is most commonly called, can be an ideal amplifier with infinite gain and bandwidth when used in the openloop mode with typical dc gains of well over 100,000 or 100db. Snoa390b september 1993 revised april 20 oa11a tutorial on applying op amps to rf applications 3 submit documentation feedback. Many references to these numbers were made in the text, and these have been changed, of course. An amplifier is anything that you put an electronic signal in, and you get out a larger version of the signal.
Practical op amps consume some power, have very high input imped. Voiceover were gonna talk about the operational amplifier, or opamp for short, and this is the workhorse of all analog electronics. In this configuration, an opamp produces an output potential relative to circuit ground that is typically hundreds of thousands of times larger than the potential difference between its input terminals. As the input resistance of ideal op amp is infinite, an open circuit exists at input, hence current at both input terminals is zero. An operational amplifier often opamp or opamp is a dccoupled highgain electronic voltage amplifier with a differential input and, usually, a singleended output. The open loop gain of practical op amp is around 7000. The input impedance z i is maximum and is finite i. Handbook of operational amplifier applications rev. Practical op amp holds the following characteristics. Active devices in electronic circuits exhibit nonlinear behavior when their. Real opamp based on opamp applications and design compare the ideal opamp with the commercial device which you investigated in the laboratory, and explain the design strategies used to achieve the required performance.
An ideal op amp is an op amp that has perfect conditions to allow it to function as an op amp with 100% efficiency. For the inverting amplifier the multiplication constant is the gain r2. Or, stated in terms of the rejection for these common mode signals, an ideal op amp has infinite cm rejection cmr. In a linear operational amplifier, the output signal is the amplification factor, known as the amplifiers gain a multiplied by the value of the input signal and depending on the nature of these input and output signals, there can be four different classifications of. Ee105 fall 2014 microelectronic devices and circuits. Opamp characteristics operational amplifiers have several very important characteristics that make them so useful. Ideal operational amplifier or ideal op amp electrical4u. Ideal input and output resistances required for opamp input resistance output resistance ideal opamp. In this video, the basic introduction of the operational amplifier opamp has been given and different characteristics of ideal and real opamp general purpose 741 opamp has been discussed. Occurs due to mismatch between the transistor bias voltages inside the opamp. Design noninverting amplifier and find the required openloop gain given data. More characteristics of opamp since the ideal opamp responds only to the difference between the two input signals, the ideal opamp maintains a zero output signal when the two input signals are equal. The other input is called the noninverting input, marked with a positive or plus. These numbers in the circles referred to pin numbers of old op amps, which were potted modules instead of integrated circuits.
Ideal op amps use no power, have infinite input impedance, unlimited gainbandwidth and slew rate, no input bias current, and no input offset. Ideal opamp circuits are analyzed by the following steps. The graph that relates the output voltage to the input voltage is called the voltage. Mt032 ideal voltage feedback op amp analog devices.
Usually, opamps with high input resistance and low output resistance are preferred. Opamps are among the most widely used electronic devices today, being used in a vast array of consumer, industrial, and scientific devices. Amplifier is designed to give ideal gain and deviations from ideal. For example, the popular 741 has a typical open loop gain a of 200000 vovi. The practical opamp has the following characteristics. The attributes of an ideal op amp basic operation the basic operation of the op amp can be easily summarized. When the two input signals are unequal, there is what is called a commonmode input signal. The third terminal represents the opamps output port which can both sink and source either a voltage or a current.321 367 73 241 12 1130 543 1061 1501 1173 200 49 106 116 266 138 823 1417 1131 1479 1235 49 430 1100 430 628 439 57 1454 528 788 1175 292 939 1305 1486


For example, a plain DHCP configuration looks like this: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp. nterface=eth0 Use interface eth0 listen-address=192. Jan 30 07:29:02 pi-tempalarm wpa_supplicant401: wlan0: Failed to initiate sched scan Jan 30 07:29:08 pi-tempalarm wpa_supplicant401: wlan0: Failed to initiate sched scan Jan 30 07:29:14 pi-tempalarm wpa_supplicant401: wlan0: Failed to initiate sched scan Jan 30 07:29:19 pi-tempalarm wpa_supplicant401: wlan0: Failed to initiate sched. Also running the wpa_supplicant command can result in some good details. One of my requirements is that the WiFi on this board be able to run as both a “managed” device (also known as “client” mode) and as an access point, preferrably at the same time.
1001 iface bond0. To activate a roaming interface, adapt the following example interfaces(5) stanza: iface eth1 inet manual wpa-driver wext wpa-roam /path/to/wpa_supplicant. VLAN AND BRIDGE INTERFACES.
8 Forward DNS requests to Google DNS domain-needed Don&39;t forward. auto lo iface lo inet loopback iface eth0 inet manual allow-hotplug wlan0. example bridge interface with additional attributes listed in the ifupdown-addons-interfaces(5) man page: auto br0 iface br0 address 12. Posted on March 10th | 3:53 am.
iface eth0 inet static: Defines a static IP iface wlan0 inet manual example address for eth0. 254: iface eth0 inet static address 192. auto lo iface lo inet loopback iface eth0 inet dhcp iface wlan0 inet manual disalbed for PirateBox allow-hotplug wlan0 wpa-roam /etc/wpa_supplicant/wpa. 155 Static IP you want netmask 255. 翻訳 · interface=wlan0 Use interface wlan0 listen-address=192. 1002 iface bond0.
Change iface wlan0 inet dhcp into iface wlan0 inet static. 5 table 2 auto wlan0 iface wlan0 inet static wireless-essid. bond0 interface auto bond0 iface bond0 inet manual bond-mode 4 bond-miimon 100 bond-slaves ens160 ens192 end224 ens256 VLAN interfaces 1001 vlan auto bond0. 2 on a Windows machine, use these settings:. Save the file and exit the editor. 8 Forward DNS requests to Google DNS domain-needed Don&39;t forward short names bogus-priv Never forward addresses in the non-routed address spaces.
A sample configuration for dhcpcd. The Raspberry Pi will still be able to connect to the internet. Setup interface to dhcp.
0 wireless-channel 1 wireless-essid MYNETWORK wireless-mode ad-hoc. But I got one solution that iface wlan0 inet manual example changing the line iface wlan0 inet manual to iface wlan0 inet. It is even harder to forward ports on your router if the IP keeps on changing. Let’s take a look at what we can put in ifupdown’s configuration file. It is required to provide a wpa_supplicant.
id_str="home_dhcp" iface home_dhcp inet dhcp this line must always be here iface default inet dhcp id_str="home_static" iface home_static inet static address 192. iface eth0 inet manual allow-hotplug wlan0 iface wlan0 inet manual. iface eth0 inet static address 192. iface eth0 inet manual:To create a network interface without an IP address at all. I hope you are happy and everything works fine for you so far.
This will cause problems when you need to remotely access your device. This changes the wlan0 interface from DHCP to static. (Note: there is no actual wlan0 interface unless you attach a wireless USB network adapter. auto lo iface lo inet loopback iface eth0 inet dhcp allow-hotplug wlan0 auto wlan0 iface wlan0 inet static address 172. That is okay, but the assigned IP can change over time or after powering off. 254 The above example assigns the. conf The default wireless configuration file /etc/wpa_supplicant.
The entries that refer to wlan0 are there for when you do ;-) ). onboard network interface auto enp4s0 iface enp4s0 inet manual PCIe nic auto enp8s0 iface enp8s0 inet manual bond inteface auto bond0 iface bond0 inet manual slaves enp4s0 enp8s0 bond-mode 802. To setup eth0 to dhcp, enter: auto eth0 iface eth0 inet dhcp. auto lo iface lo inet loopback auto wlan0 iface wlan0 inet dhcp hostname wyse3030-3 auto eth0 iface eth0 inet manual pre-up ifconfig $IFACE up pre-down ifconfig $IFACE down Notice that the wireless iface wlan0 inet manual example interface (wlan0) uses dhcp from the home network as usual and that an IP address is not used at all on the wired interface (eth0). Here is an example of configuration it will adapt to your configuration.
Example: auto eth0 allow-hotplug eth0 iface eth0 inet manual 2. 1 wpa-ssid "YOUR_SSID" wpa-psk "YOUR_KEY" iface default inet dhcp Alternative Setup – Using a hidden SSID and need to specify all of the WiFi settings. 1002 inet manual vlan-raw-device bond0 1003 vlan auto bond0. Enabling Simultaneous AP and Managed Mode WiFi on Raspberry Pi Zero W (Raspbian Stretch) I recently purchased a pair of Raspberry Pi Zero W boards, and plan to use them for some home automation / IoT-type work. By default, Raspberry Pi uses DHCP to get an IP assigned. 1001 inet manual vlan-raw-device bond0 1002 vlan auto bond0. conf(5) for details. 1 IP of your router.
For example, to set up a static IP of 192. 3ad bridge interface auto br0 iface br0 inet static address 192. Add the following lines before the wpa-conf line: address 192. iface lo inet loopback iface eth0 inet dhcp auto wlan0 allow-hotplug wlan0 iface wlan0 inet dhcp wpa-scan-ssid 1 wpa-ap-scan 1 wpa-key-mgmt WPA-PSK wpa-proto RSN WPA wpa-pairwise CCMP TKIP wpa-group CCMP iface wlan0 inet manual example TKIP wpa-ssid “My Secret SSID” wpa-psk “My SSID PSK” iface default inet dhcp.
iface default inet dhcp. Example: Eth0 auto eth0 iface eth0 inet manual pre-up modprobe 8021q pre-up ifconfig eth0 up post-down ifconfig eth0 down Vlan Interface auto vlan10 iface vlan10 inet static address 10. Usually used by interfaces that are bridge or aggregation members, or have a VLAN device configured on them. auto wlan0 iface wlan0 inet static address 192. If this is the case you should be able to access the Rasperry Pi using ssh with the IP address configured for wlan0. Instead of the line: iface eth0 inet dhcp you need lines like this: iface eth0 inet static address 192.
1003 iface bond0. 1 Add a permanent road. 1 iface pppoe inet manual pre-up /sbin/ifconfig eth0 up up ifup ppp0=dsl down ifdown ppp0=dsl post-down /sbin/ifconfig eth0 down The following is. allow-hotplug wlan0 iface wlan0 inet manual. Reboot and test your configuration with wlan0; Now it&39;s time to reboot and test wlan0.
For example, the wireless-tools package makes available a number of options prefixed with "wireless-" which can be used to configure the interface using iwconfig(8). A sample configuration for dhcpcd. iface textstring inet static AFTER the wpa-roam entry. See examples section for details. conf lets the device connect to any open access point. auto wlan0 iface wlan0 inet dhcp wpa-driver nl80211 wpa-conf /etc/wpa_supplicant.
iface lo inet loopback auto eth0 iface eth0 inet. Then add the following lines below the line that reads allow-hotplug wlan0 to set the static IP address for the new access point: iface wlan0 inet static address 192. conf Plug in adapter Confirm adapter is present:. There are two main directives: auto network-device, which tells ifupdown to automatically configure the network interface once it is available, and iface network-device inet/inet6 type to configure a given interface. ROUTING TABLE: 2. (See wireless(7) for details. 1 How to Check Routing Table?
For example a typical file with a single wireless network might look like the following:. 1 Explicitly specify the address to listen on bind-interfaces Bind to the interface to make sure we aren&39;t sending things elsewhere server=8. auto lo iface lo inet loopback auto wlan0 iface wlan0 inet static address 192. The following example brings up the interface on boot up by identifying the inteface with auto wlan0. For example, a plain DHCP configuration looks like this:. 1 wpa-essid MYESSID12345 wpa-psk MYPASSWORD34567 Of course, substitute your details here. auto lo iface lo inet loopback iface eth0 inet dhcp The wireless interface auto wlan0 iface wlan0 inet dhcp wpa-conf /etc/wpa.
5 IP address and gateway (router) to 192. ) Options are usually indented for clarity (as in the example above) but are not required to be. Restart the interface: sudo ifdown wlan0 && sudo ifup -v wlan0 Test: ping -c3 www. Example and Explanation. For example following example setup eth0 (first network interface card) with 192.
Raise the interface on each node: ifup wlan0. 1 dns-domain example. auto lo iface lo inet loopback iface config1 inet dhcp iface config2 inet static address 192. The ip address configured for wlan0 should now appear if ifconfig is issued. conf Two daemons are spawned from the above example; wpa_supplicant and wpa_cli. Examples: How to set up interfaces.
auto lo iface lo inet loopback iface eth0 inet dhcp allow-hotplug wlan0 iface wlan0 inet manual address 192. up route add – net IP_RPI/24 gw IP_GATEWAY, giving for example:. 254 vlan-raw-device eth0 ip_rp_filter 0. 1 Explicitly specify the address to listen on bind-interfaces Bind to the interface to make sure we aren&39;t sending things elsewhere server=8. The rules defined after iface wlan0 inet manual specify the the set of commands to execute as the interface is controlled by the system. In such scenario you may try replacing “dhcp” with “manual”. com dns-nameservers 192.
If your IP is not on the same subnet, it is possible to add a permanent route with the option. Scan for ad-hoc cells in range (necessary for some drivers to trigger IBSS scanning):. iface wlan0 inet dhcp Also wpa-debug-level 3 was very helpful and must proceed the wpa-roam statement in the interfaces. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. iface wlan0 inet manual オンラインで見ます. Raspberry Pi’s routing table can be checked using “route” command – Example:.
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OQ Technology is the world’s first satellite 5G IoT operator that provides global cellular Internet-of-Things and Machine-to-Machine communication solutions through satellites. The company has successfully implemented and demonstrated Narrowband IoT connectivity over Low Earth Orbit satellites and is deploying a global constellation to provide 5G IoT telecommunication services for mobile operators and customers in industries such as energy, mining, logistics, maritime, agriculture, and defense. The company’s patented technology that can be easily embedded in existing 5G chips allows billions of users around the world to have ubiquitous IoT connectivity anywhere and using both terrestrial and satellite networks.


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