Ditemukan 3143 dokumen yang sesuai dengan query
Kicthen, Ronald
"Buku yang berjudul "Radio frequency & microwave radiation safety" ini ditulis oleh Ronald Kicthen. Buku ini membahas tentang frekuensi radio dan keamanan radiasi."
Boston: Oxford : Newnes, 2003
R 681.414 8 KIT r
Buku Referensi Universitas Indonesia Library
Fantom, A.
London: Peter Peregrinus, 1990
621.381 3 FAN r
Buku Teks SO Universitas Indonesia Library
"This book combines theoretical concepts with experimental results on thermal microwave radiation to increase the understanding of the complex nature of terrestrial media. With the emphasis on radiative transfer models, this new book covers the urgent needs for the transition from the experimental phase of microwave remote sensing to operational applications. This book covers all terrestrial aspects from clear to cloudy atmosphere, precipitation, ocean and land surfaces, vegetation, snow and ice.
A chapter on new results of microwave dielectric properties of natural media, covering wavelengths from the decimetre to the submillimetre range, will be a source for further radiative transfer developments, which extends the applicability to radar and other electromagnetic tools, which include extraterrestrial objects, for example planets and comets."
London: Institution of Engineering and Technology, 2006
e20452120
eBooks Universitas Indonesia Library
Bhargava, Deepshikha
"The rapidly increasing concern of non-ionizing microwave radiations affecting human health adversely has been gaining much of attention. a large volume of research studies have been published in the past decade. most of the previous review literature in this key research area are limited to a certain domain leading to questionable gaps that still need to be filled. this paper, therefore, investigates and analyses all possible gaps, which are left in recent literature related to this issue and aims to provide an inclusive up-to-date overview of evidences and epidemiological studies on different parts of human body, in both adult and children. based on the literature review, it is evident that the rise in the Specific Absorption Rate (SAR) above its maximum value due to the exposure from non-ionizing radiation can cause severe effect on human body such as a cataract formation in the eye, a shortfall in sperm count in men etc. specific Anthropomorphic Mannequin (SAM) model, which is used as a certification technique for cell phone, is found to be overestimating the adult and child head exposure by using same geometric model for child and adult head types. It has also been observed that the electromagnetic radiation has both positive and negative effect on the human life, depending on the context of its application. It is envisaged that human can gain from the positive side and avoid the negative effect. A step by step example of numerical simulation model is illustrated to support future researchers in developing further work in this research area."
Pathum Thani: Thammasat University, 2017
607 STA 22:3 (2017)
Artikel Jurnal Universitas Indonesia Library
Carr, Joseph J.
Boston: Newnes, 2002
R 621.384 CAR p
Buku Referensi Universitas Indonesia Library
Carr, Joseph J.
Amsterdam: Newnes, 2002
621.384 CAR p
Buku Teks Universitas Indonesia Library
"
Short-range HF radio communication (NVIS: Near Vertical Incidence) is often forgotten because of the many other means of communication that can easily be used. When there is a natural disaster or in emergency situations where regular communication is not functioning, this type of communications are used as the alternative means to overcome the problems. As other HF radio communication, the short distance HF communications also utilizes the reflection of radio waves by the ionosphere. The combination of frequency, radio waves elevation angle and the appropriate transmit power will make this communication work well. This paper discusses the NVIS communications working frequencies selection by using the ionosphere observation data. Ionospheric observations result at Tanjungsari (6,54° S, 107,55â° E) shows that for NVIS communication at the daytime (between 8:00 to 17:00 LT) around Tanjungsari in March, a good frequency to use is 4.7 to 10.1 MHz at a low level of solar activity and 9,1 to 14.4 MHz at high solar activity, while for June are 4.9 to 7.9 MHz and 10 to13 MHz respectively. "
620 DIR 6:1 (2011)
Artikel Jurnal Universitas Indonesia Library
Nekoogar, Faranak
"Ultra-wideband radio frequency identification systems describes the essentials of radio frequency identification systems as well as their target markets. The authors provide a study of commercially available RFID systems and characterizes their performance in terms of read range and reliability in the presence of conductive and dielectric materials.
The capabilities and limitations of some commercial RFID systems are reported followed by comprehensive discussions of the advantages and challenges of using ultra-wideband technology for tag/reader communications. The book presents practical aspects of UWB RFID system such as : pulse generation, remote powering, tag and reader antenna design, as well as special applications of UWB RFIDs."
New York: Springer, 2012
e20398996
eBooks Universitas Indonesia Library
Faruque, Saleh
"This book introduces Radio Frequency Cell Site Engineering to a broad audience. The author blends theory and practice to bring readers up-to-date in key concepts, underlying principles and practical applications of wireless communications. The presentation is designed to be easily accessible, minimizing mathematics and maximizing visuals."
Switzerland: Springer Nature, 2019
e20509898
eBooks Universitas Indonesia Library
Faruque, Saleh
"This book provides a comprehensive overview of multiple access techniques used in the cellular industry. The usage of multiple access techniques in telecommunications enables many users to share the same spectrum in the frequency domain, time domain, code domain or phase domain. Licenses are given, by the FCC, to operate wireless communication systems over given bands of frequencies, with the smaller bands, (channels), reused to provide services to other users. Thus, bandwidth efficiency is vital, as the speed and size of digital data networks continue to expand. This brief also uses numerous illustrations to bring students up-to-date in the practical applications of multiple access techniques, which can then be put to work in the industry. Primarily, electrical engineering students who study telecommunications, as well as engineers and designers working in wireless communications, would find this book useful."
Switzerland: Springer Cham, 2019
e20502457
eBooks Universitas Indonesia Library