Thursday, June 25, 2015

Just a drop of blood the new sensor can measure cancer and cholera



According to the latest issue of "Journal of the American Chemical Society," it reported that the International team includes Canadian researchers have developed a new, including graphene sensors. The biosensor to detect cholera toxin not only has a very high sensitivity, but also provide early diagnosis for cancer and other diseases. Surface plasmon resonance (SPR) sensor is a medical diagnosis of optical technology for high sensitivity and specificity. The researchers found that adding graphene may cause SPR sensor signal multiplied, so that a single molecule can anchor an ultrathin layer of a particular disease signal.

The sensor can detect within minutes of the cholera toxin, by contrast, the current detection techniques require hours or even days. The technology can also be extended to detect almost any including cancer disease markers.


The researchers said that in addition to faster and greatly improved due to the sensitivity of the sensor can be more easily detected small amounts of biological markers, in order to create conditions for the early diagnosis and prognosis of cancer and other diseases. This means that, just use a drop of blood sample from a patient acupuncture, can detect the biomarkers of disease.

SPR biosensor is significantly larger than the standard enzyme-linked immunosorbent assay (ELISA) has a higher sensitivity, laboratory-grown graphene proof than before the use of other forms of graphene is more suitable for the development of new sensors. Graphene is called chemical vapor deposition growth technique to create a large-area graphene nearly defect-free, uniform surface of the graphene helps amplifying the sensor signal.

Tuesday, June 23, 2015

Electromagnetic interference shielding data center cabling system

1, interfering with the data center cabling system

Cabling system consists of several subsystems, signal size of each subsystem used, frequency, etc. are not the same height, so there is interference, as well as the mutual interference between the various loads. To sum up, the integrated wiring system has the following sources of interference.

1.1 sources of interference from the data center within the building

(1) distribution network and the distribution box to generate high-frequency interference.

(2) high-power electric motor electric spark generated by harmonic interference.

(3) fluorescent lamps, electronic ballasts produce interference.

(4) High-frequency switching power supply interference.

(5) generated by the telephone ringing current interference.

(6) Information processing device generates periodic pulse interference.

If the cabling system can not keep a safe distance from these sources may be used to reduce or eliminate shielding system interference sources above the interference of cabling system.

1.2 the source of interference from outside the data center building

Sources of interference from outside the data center architecture are:

Radar, radio transmission equipment, mobile phone base stations, high-voltage wire, electrified railways, lightning strike zones in the interference signal environment and so on.

Obviously intelligent building external interference sources have a high electric field strength, when external cabling systems exist one or more sources of interference should be shielded system.

1.3 sources of interference from the surrounding environment cabling system

Cabling system noise level ambient interference signal field strength or integrated wiring system also should be shielded to protect the system exceeds the following requirements.

(1) computer local area network, if the frequency of the interference signal is introduced l0kHz ~ 600MHz, its field strength of 1V / m; frequency of 600MHz ~ 2.8GHz interference signal field strength of 5V / m.

(2) telecommunications terminal equipment, is introduced through the signal line and other DC or AC frequency of the interfering signal introduced into 15 ~ 80MHz, the field strength of 3V / m (amplitude modulation 80%, 1kHz).

Terminal Equipment (3) with analog / digital terminal interface to provide telephone service, the noise level exceeds 40dB total bandwidth should be less than 200MHz.

(4) The background noise level should be at least 12dB smaller than the reference.

2, comprehensive sets of wiring system anti-jamming measures

Electric field strength interference waves emitted cabling system exceeds a predetermined value, whether factors that need protective measures is more complex, which is the most harmful anti-electromagnetic interference and electromagnetic radiation. EMI issues related to the cabling system can work properly; electromagnetic radiation is related to the safety of cabling system under normal operating conditions information from being stolen by other persons, or causing electromagnetic pollution.

Conducting integrated wiring systems engineering design must be in accordance with the requirements of the construction unit, carry out a detailed arrangement and design, selecting appropriate protective measures.

2.1 shielding measures to reduce electromagnetic interference

Metal casing (1) Information systems, cable shield and metal trunking and other buildings in the introduction frame or equipotential bonding. Information system lightning protection zone in which the magnetic field strength attenuation should be calculated, to take appropriate measures to shield according to the results.

(2) The data center should not be located in high-rise buildings, should lower center of the building. Related equipment to try to stay away from the building facade. Take appropriate measures in accordance with the requirements of lightning protection zones shield and information equipment, electromagnetic field generated when the lightning to the inner decay.

(3) The information device is a non-metallic housing and the shield of the building did not meet the requirements, the importance of information equipment room or equipment based on the direct installation of metal screen or shielded room, shielded metal shielded rooms and other potential connection with phase.

Outdoor line of shielding measures 2.2

Outdoor wiring shield to note the following.

(1) the need to protect the local potential should use shielded cables and both ends of the shielding layer is peer connections, the shield after the junction of the lightning protection zones should also be equipotential connection.

(2) the use of the cable metal-containing components, shall at all into the household of the metal plugs, metal tidal layer and the metal strengthening the core metal member equipotential connection.

Room (3) Building interconnecting cables should be laid in a metal pipe, metal pipe ends to be connected to other potential electrical connections and connections to bring each building. Cable conduits must be equipotential connection. If between adjacent buildings have power and communication cables, the grounding device should be connected to each other.

2.3 Strengthening internal cabling system structure and materials of immunity

This is mainly possible electromagnetic interference requirements for products and equipment may be affected by electromagnetic interference raised. Specific requirements in the manufacturing process is tested to the appropriate standard.

Overall, computer equipment, communications equipment and electronic equipment and other products shape the structure should be made of a metal material box, box, cabinet or shelf, making it in the form of a Faraday cage, a ground terminal, and well grounded. This ability to somehow enhance immunity and radiation protection equipment.

For cable selection Cabling system must meet the system requirements, combined with the buildings surrounding electromagnetic environment into account, usually anti-jamming capability and transmission capacity is the major consideration, but also to consider the economic cost.

Select cables and cabling system connecting hardware, when determining whether a category that you want to ensure consistency. If you choose to shield the cables and connecting hardware must be shielded, and have a good grounding system. Link cabling system commonly used twisted pair, UTP has the ability to absorb and emit electromagnetic waves.

2.4 Note from the equipment and transmission lines between the different sources of interference

In addition to the use of shielded cabling system, well grounded in order to improve their own immunity, radiation protection, but also as far away from interference sources, in order to reduce its impact on the normal operation of the system, improve the reliability of systems and equipment to make Data center cabling system truly become a standard, standard cabling system.

Through a number of experiments shows that when the interference source distance transmission line at different distances, the distortion degree of the transmission signal is different. Therefore, in the construction and installation process should pay attention to the relationship between the wiring system and the distance from the source of disturbance, in strict accordance with standard design, construction, and make the appropriate testing to ensure normal and reliable cabling system.

Friday, June 19, 2015

Why periphery and core are to be considered when selecting a CPU

New products bring to market quickly - with increasing design complexity. To help customers succeed, has been certified for ARM Accredited Engineer Future Electronics' MCU 300 engineers.

The time factor more than ever now plays a crucial role in product development and in meeting the timeframe for the launch. Choosing a core that does not exactly meet the requirements can jeopardize the entire schedule. The technical distributor Future Electronics is therefore on the intensive training of its field application.

300 engineers have been in the last year certified for ARM Accredited Engineer MCU and can now offer extensive assistance in the core selection. Uwe Knipping, technical solutions manager at Future Electronics, explains in an interview with the ELEKTRONIKPRAXIS which criteria are of particular importance.

ELEKTRONIKPRAXIS: What were the reasons for the ARM certification of engineers at Future Electronics?

Uwe Knipping: Through our work with customers, we found that great need for education is around choosing a suitable cores. As a technical distributor we set at the beginning of the development work on with our assistance around the choice of a core and place here the course for the project's success.

Participation in the ARM AAME program and the associated certification of Future Field Application Engineers will create the necessary basis of trust with our customers and at the same time laid the foundation to meet the different advisory requirements. By profound knowledge about ARM cores, we are even better able to design teams the customer from the start of a new project at the right decision to accompany architecture.

Why is this help today in the project so important?

Through ARM-based cores a vast variety of CPU choices has emerged in the last five years. Many manufacturers use the same core for its microcontroller, so that differentiation at first glance is not easy. Our experiences have shown that when choosing a microcontroller knowledge is tacitly over the core.

The manufacturer informed about what they have implemented around the core to the periphery. They provide customers with a wealth of material on data sheets and examples. Often but not find the time for individual advice on specific project. Here we jump and connect our core specific knowledge with the peripheral requirements.

Important is the vendor-neutral advice that we can with our overview of various ARM-based products and proprietary cores, such as the MIPS or AVR platforms, offer through our broad-based linecard in order to arrive at an optimal solution for specific customer needs.

Wednesday, June 17, 2015

With a heart rate sensor Sony Smart Watch SmartBand 2 exposure



Usually in the form of stand or companies will disclose conference to showcase new products, or released well-made website to attract users to get as much attention. But do not take the unusual way Sony is using a new approach, although the second-generation SmartBand Smart Watch has not been released, but the relevant supporting applications have first landed Play store, but in the press before the page is offline application, but fast chips Foreign media have been preserved image.

Apparently Sony is developing a new generation of SmartBand, new product called "SmartBand2", increasing the heart rate sensor, capable of better qualified fitness tracking. The new application interface to Sony professional Lifelog application more professional, to get the best of both with a complete experience.

Contemporary with the same model, SmartBand2 sleep and can simultaneously track the number of steps varies depending on the mobile phone side dress remind transmission weather conditions, after the alarm can be set to vibrate. There are also dedicated buttons for all of the data can be retained screenshots to help you ah recorded statement is very meaningful moment.

Monday, June 15, 2015

GreenPeak attention to partners in China to build a new eco-smart home business applications



Founder of the world's leading smart home Semiconductor / Enterprise GreenPeak Technologies and CEO Cees Links represent a reporter conference in Grand Hyatt Beijing recently held, GreenPeak Technologies is seeking Chinese partners to jointly promote and create objects Smart Home ecosystem networked platform, work potential partners to accelerate the development of smart city projects. Said Mr. Cees Links, GreenPeak China witnessed an important step towards the Internet of Things. GreenPeak solutions not only solve the aging of the huge Chinese demand, but not enough to fill the number of pension institutions of challenges.

According to the world's leading market research firm Research and Markets report on China's smart home industry: China smart home from 2011 to 2014, annual growth of 30% in 2014, smart home applications and products overall value reached 28.61 billion yuan, compared with 2013 increased by 39%.
Things era many Chinese telecom operators, service providers and original equipment manufacturers (OEMs) in China coming to seek opportunities. For the semiconductor industry, networking equipment based on market opportunities on behalf of the IEEE 802.15.4 and ZigBee technology trillions. Open global wireless networking standard allows a single smart devices are interconnected, lay the foundation for the Internet of Things, and to further improve the comfort, safety and efficiency of daily life.

GreenPeak Technologies founder and CEO Cees Links, said: "The current number of elderly people in China have nearly 200 million, of which about 50 million elderly people living alone to solve China increasingly serious aging problem, the key lies in the effective use of the smart home. solution, expanded use of things to install and run more economical, easier to scale .GreenPeak the social skills, learned to recognize the behavior of cloud-based self-learning ability, as well as analysis algorithm is applied to the smart home solutions, and is committed to using cutting-edge ZigBee technology and strategic cooperation model for the development of China's intelligent home networking ecosystem and contribute and really smart to upgrade the average family to family. "
Chinese social media users is most concentrated. This makes it possible to take advantage of the rapid development of China's Internet of Things technology, social media and online communications capability into the smart home applications, and it also allows families with children and the elderly in the premise of ensuring the privacy of living safely share information . Dispersed throughout the home ZigBee sensors can quietly collect data upon detection of abnormal behavior or unexpected situation, the system through social networks, such as micro letters and QQ, immediately notify the family or friends to take the necessary measures. Smart Home system makes the elderly feel more secure and increase the length of time an independent home for the elderly. Even the elderly and children separated in different cities, the smart home system will also enhance communication efficiency, and shorten the distance between the elderly and their children.

The growing strategic partnership

GreenPeak since last year opened an office in Hong Kong, China, to continue doing business in China first-tier cities, and set up offices in Beijing. In order to better serve our customers, partners, service providers and smart home ecosystem, GreenPeak plans to set up an office in Shanghai.

In March, GreenPeak with ZTE ZTE's Health Technology Co., Ltd. (ZTE Health) signed a cooperation agreement to jointly develop smart home applications. The aim of this cooperation is based on China as a starting point, to provide intelligent solutions to the problem of aging of the world. The thrust of the strategic business alliance is possible to extend the time for the elderly to live independently at home, but also make caregivers and families more peace of mind. By partnering with ZTE Health Technology Co., Ltd., GreenPeak hopes to create a more secure environment for the elderly who will be the home of independent elderly prolonged 5--10 years. Compared to the construction of the pension agency, independent lifestyle at home for Chinese families and local governments to ease enormous economic burden.

2014, GreenPeak with the world's leading wireless module solutions for design and manufacturing experts USI Electronics to develop a sensor device of a high-performance low-cost ZigBee module for the intelligent home. The new ring Asahi Electronic ZigBee module so that the original is not good at USI ZigBee technology electronic equipment development partners can quickly deploy and implement equipment upgrades, greatly reducing the time to market of its equipment, so smart home devices more widely and more affordable.