Temat: wireless communication

Skocz do pozycji: 1.

Tytuł:: Wireless Capsule Endoscope Localization with Phase Detection Algorithm and Simplified Human Body Model
Autorzy:: Oleksy, Paweł
Januszkiewicz, Łukasz
Tematy:: wireless endoscope
human body model
wireless localization
wireless communication; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/226699.pdf Link otwiera się w nowym oknie
Opis:: Wireless endoscopic capsules can transmit the picture of the inside of the digestive tract to the external receiver for the purpose of gastrointestinal diseases diagnose. The localization of the capsule is needed to correlate the picture of detected anomalies with the particular fragment of intestine. For this purpose, the analysis of wireless transmission parameters can be applied. Such methods are affected by the impact of the human body on the electromagnetic wave propagation that is specific to the anatomy of individual person. The article presents the algorithm of localization of endoscopic capsules with wireless transmitter based on the detection of phase difference of received signals. The proposed algorithm uses simplified human body models that can change their dielectric properties in each iteration to improve the location of the capsule endoscope. Such approach allows to reduce localization error by around 12 mm (15%) and can by used for patients of different physique without the need of the numerical models of individual body.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: A New CPW-fed Patch Antenna for UWB Applications
Autorzy:: Sharma, P.
Jha, S. K.
Bhattacharya, P. P.
Tematy:: planar antenna
ultra wideband
wireless communication; Pokaż więcej
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/308292.pdf Link otwiera się w nowym oknie
Opis:: In this paper, the design and analysis of a compact size coplanar waveguide (CPW)-fed antenna for ultrawideband (UWB) applications is presented. The antenna has a compact size of 20×20×1.1 .5 .mm and provides a good impedance matching over the entire bandwidth of 3.2–14.3 GHz. The characteristics parameters, i.e. return loss, VSWR and radiation pattern, are analyzed using HFSS 11.0 software.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 3.

Tytuł:: A mobility and bandwidth prediction controller using an adaptive neuro-fuzzy inference system for mobile Ad Hoc and sensor networks
Autorzy:: Martyna, Jerzy
Wydawca:: Springer
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Electromagnetic Field Generated by Wireless Alarm Devices
Autorzy:: Pospisilik, M.
Vnencakova, E.
Tematy:: wireless communication
power density
electromagnetic field; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/963854.pdf Link otwiera się w nowym oknie
Opis:: Together with the rise of importance of devices employing wireless networks based on the principle of radio frequency data transfers, also the discussion on harmfulness of the electromagnetic radiation has occurred. The authors of this paper obviously cannot provide unambiguous answers to stop this discussion. On the other way, they can provide the reader of this paper with real data obtained by measurements processed inside a semi anechoic chamber that were performed at several wireless alarm peripherals. The measured values are compared to the technical and hygienic standards so the reader can form an idea of the amount of the radiated energy. Moreover, examples of waterfall diagrams of spectra generated by the devices are also listed in this paper.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: High Q-factor Fabry-Perot microresonator as an alternative to microdisk in electro-optical modulator for microwave-photonic receivers
Autorzy:: Baghdasaryan, H. V.
Knyazyan, T. M.
Marciniak, M.
Tematy:: electro-optical modulator
microwave-photonic receivers
wireless communication; Pokaż więcej
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/308890.pdf Link otwiera się w nowym oknie
Opis:: In the last decade a new idea has been suggested for receivers of communication systems, namely, in microwave receivers’ architecture. Though superheterodyne radio-frequency receivers are best suited to the needs of contemporary wireless communication, however stray radiation of their local oscillator (heterodyne) interferes with neighboring radio-devices and permits to locate the covert receiver. To overcome this drawback the signal transfer to optical range has been suggested. By this conversion, not only an elimination of receiver’s stray radiation is attained but also vast advantages of photonic signal processing become available. The key element of existing microwave-photonic receivers is electro-optical microdisk modulator. However, its realization is complicated and as an alternative an electro-optical modulator based on high Q-factor Fabry-Perot microresonator is suggested. Comparative analysis of both types of modulators is performed, and advantages of high Q-factor Fabry-Perot microresonator based modulator are highlighted.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Miniaturized Spectacles Shaped Tapered Slotted Patch Antenna for UWB Applications
Autorzy:: Islam, M. T.
Samsuzzaman, M.
Mahmud, M. Z.
Tematy:: patch antenna
tapered ground
UWB
wireless communication; Pokaż więcej
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/307753.pdf Link otwiera się w nowym oknie
Opis:: A compact planner patch ultra-wideband (UWB) antenna is presented in this paper. The antenna configuration consists of a spectacles-shaped patch and a slotted ground plane. Different parameters are investigated for improving the antenna’s properties and for achieving the preferred UWB band (3.1–10.6 GHz). The experimental and simulated results demonstrate that the proposed antenna acquires an operating bandwidth of 117% (3–11.5 GHz) with a stable omnidirectional radiation pattern, about 89% of average radiation efficiency and 4.2 dBi of average gain with the maximum of 5.7 dBi at 10.2 GHz.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Wireless system for radiometric measurements
Autorzy:: Jakowiuk, A.
Pieńkos, P. J.
Kowalska, E.
Filipiak, P.
Świstowski, E.
Tematy:: radiometric probes
radon concentration measurements
wireless communication; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/146860.pdf Link otwiera się w nowym oknie
Opis:: Wireless system for radiometric measurements contains probes, for gamma radiation measurements and other probes for radon concentration measurements in air and water. The probes have the form of droplet-tight cylinders powered from a local battery. Measuring data collecting unit, based on a portable computer, communicates directly with the probes in a wireless manner using the WiFi communication network, or through the internet using mobile phone GSM network. Serial port wire connection is also possible. The local battery ensures at least 14 days of continuous operation of the probes. For long term measurements, the probes can also be powered from solar panels. Construction and operation of the probes are described. Results of scintillation probes investigation are given. Detection efficiency of the developed probes is comparable with the laboratory probes offered in our country.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Application of wireless audio transmission circuit using laser technology
Autorzy:: KARAARSLAN, Ahmet
ÖZER, Tolga
Tematy:: laser
audio transmission
wireless communication
laser technology; Pokaż więcej
Wydawca:: Uniwersytet Rzeszowski
Powiązania:: https://bibliotekanauki.pl/articles/457189.pdf Link otwiera się w nowym oknie
Opis:: In technology, we see major innovation and improvements in our daily tools and machines. Meanly, technology is in constant race to get better than yesterday. It has been amazing upwards trend in technology over last 20 years to the level of „space time”. One of the major technology development areas are in the laser field. Although laser technology has been out there for many years, we have seen tremendous new laser applications recently. We are taking advantage of laser technology in all aspects of our life. As long as we use its precise and right parametric range, we get very valuable results. In this study, general information about lasers and laser wireless audio transmission circuit application was designed.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Metrological features of a beta absorption particulate air monitor operating with wireless communication system
Autorzy:: Jakowiuk, A.
Urbański, P.
Świstowski, E.
Machaj, B.
Pieńkos, J.
Kowalska, E.
Tematy:: ambient air
beta-ray absorption
particulate matter
wireless communication; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/146846.pdf Link otwiera się w nowym oknie
Opis:: A system for measurements of particulate matter in the ambient air, employing beta absorption instrument AMIZ-2007 with wireless communication facilities based on GPRS technology, is presented. Uncertainty of measurements caused by the counting statistics was analyzed and it was found that at least 3 h of sampling time is needed to achieve coefficient of variation lower than 20% for the average concentration of particulate matter in the ambient air exceeding 10 μg/m3. Application of a C-14 beta ray source instead of Pm-147 improves sensitivity of the measurement ca. two times. Some results of on-line operation of the system with PM10 and PM2.5 samplers are also shown.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Urban transport safety improvement based on centralized traffic control system, colombian case study
Autorzy:: Berrío, J. S.
Dussich, D.
Szpytko, J.
Tematy:: traffic control
centralized control
software development
wireless communication controller; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/243545.pdf Link otwiera się w nowym oknie
Opis:: In a modern urban organization, mobility is an important issue for society. Traffic congestion of urban roads undermines mobility is a real problem in major cities This article shows the development and implementation of a centralized traffic control system in the city of Cali Valle (Colombia) applied to control traffic lights located to the east of the city (Simon Bolivar and Ciudad de Cali highways), allowing the central operators directly influence the traffic flow, know and display the status of the lights and generate statistics about the events of the online equipment. Particular real benefits of proposed new system of traffic lights are reflected in green times at each intersection allocated in accordance with the present traffic volumes on the road network at any time of day and in every sector of the city in particular, which of course increases the efficiency of each light installed at each intersection. As demonstrated in this article case study, the congestion scheme has been improved, and the project has opened up vast opportunities for innovative network management strategies for the optimization of network performance. Many of these strategies are developed to give a coordinated high-level control across different traffic control platforms based on real time traffic condition and performance on site.
Dostawca treści:: Biblioteka Nauki

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