نتایج جستجو برای: on off body communications

تعداد نتایج: 8808123  

Journal: :IEEE Open Journal of Antennas and Propagation 2021

Owing to the mobility of a wearable antenna and unpredictable body-centric communications environment, dual-polarization antennas are essential for both energy harvesting. This paper presents dual-polarized four-port textile antenna/rectenna simultaneous wireless information power transfer (SWIPT) applications. The proposed utilizes dual ports off-body communication harvesting from horizontal v...

Journal: :the journal of tehran university heart center 0
rezayat parvizi cardiovascular research center, tabriz university of medical sciences, tabriz, iran. mohammad rahbani noubar cardiovascular research center, tabriz university of medical sciences, tabriz, iran. susan hassanzadeh salmasi cardiovascular research center, tabriz university of medical sciences, tabriz, iran.

background: it is well documented that coronary artery bypass grafting (cabg) with cardiopulmonary bypass (cpb) causes ischemia and oxidative stress of the whole body. to compare the effect of on – pump and off –pump cabg on the induction of the oxidative stress and the metabolism of homocysteine which is involved in the synthesis of glutathione was investigated in the cabg patients during the ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده برق و کامپیوتر 1391

در این پایان نامه، کنترل نرو-فازی در پرنده هدایت پذیر از دور (پهپاد) استفاده شده است ابتدا در روش پیشنهادی اول، کنترل کننده نرو-فازی توسط مجموعه اطلاعات یک کنترل کننده pid به صورت off-line آموزش دیده است و در روش دوم یک کنترل کننده نرو-فازی on-line مبتنی بر شناسایی سیستم توسط شبکه عصبی rbf پیشنهاد شده است. سپس کاربرد این کنترل کننده در پهپاد بررسی شده است و مقایسه ای ما بین کنترل کننده های معمو...

2014
Mohammad Monirujjaman Khan Qammer Hussain Abbasi Akram Alomainy Clive Parini

In this paper, subject-specific narrowband (2.45 GHz) and ultra-wideband (3–10.6 GHz) on-body radio propagation studies in wireless body area networks (WBANs) were performed by characterizing the path loss for eight different human subjects of different shapes and sizes. The body shapes and sizes of the test subjects used in this study are characterised as thin, medium build, fatty, shorter, av...

2014
Behailu Kibret Assefa K. Teshome Daniel T. H. Lai

Human body communication (HBC) is a promising wireless technology that uses the human body as part of the communication channel. HBC operates in the near-field of the high frequency (HF) band and in the lower frequencies of the very high frequency (VHF) band, where the electromagnetic field has the tendency to be confined inside the human body. Electromagnetic interference poses a serious relia...

Journal: :hepatitis monthly 0
nima motamed department of social medicine, zanjan university of medical sciences, zanjan, ir iran behnam rabiee gastrointestinal and liver disease research center (gildrc), tehran firoozgar hospital, iran university of medical sciences, tehran, ir iran gholam reza hemasi gastrointestinal and liver disease research center (gildrc), tehran firoozgar hospital, iran university of medical sciences, tehran, ir iran hossein ajdarkosh gastrointestinal and liver disease research center (gildrc), tehran firoozgar hospital, iran university of medical sciences, tehran, ir iran mahmood reza khonsari gastrointestinal and liver disease research center (gildrc), tehran firoozgar hospital, iran university of medical sciences, tehran, ir iran mansooreh maadi gastrointestinal and liver disease research center (gildrc), tehran firoozgar hospital, iran university of medical sciences, tehran, ir iran

background a strong association between obesity and non-alcoholic fatty liver disease (nafld) has been reported. objectives this study was conducted to evaluate if new obesity indices, including a body shape index (absi) and body roundness index (bri), have stronger associations with nafld than waist-to-hip ratio (whr) and waist-to-height ratio (whtr). methods in this cross-sectional study, we ...

2015
Sean Rocke Jeevan Persad

In this paper magnetically-coupled human body communications (MHBC) is investigated. In human body communications (HBC) the human body is the transmission medium through which wireless sensors and actuators in, on or in close proximity to the human body exchange information. MHBC, unlike the more common galvanic and capacitive coupled HBC, is less affected by the proximity to the surrounding en...

Journal: :IEEE Trans. Communications 2002
Lutz H.-J. Lampe Robert Schober Gerald Enzner Johannes B. Huber

Coded continuous phase modulation based on a feedback–free modulator with noncoherent detection is discussed. Low–complexity receiver processing is achieved by using only two or three linear filters for demodulation and applying noncoherent sequence estimation with reduced–state Viterbi decoding and simple branch metric calculation. Overall, the proposed noncoherent receiver provides significan...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده برق و کامپیوتر 1393

درابتدا مروری گذرا بر کارهای انجام شده در زمینه تولید امواج پلاسمونی سطحی با گرافن و همچنین مدولاتورهای تراهرتز ارائه و شرایط لازم برای ایجاد امواج پلاسمونی در سطح فلز بررسی می شود. سپس، با بهره گیری از رابطه پاشندگی گرافن و رابطه کوبو، خواص پلاسمونی گرافن مرور خواهد شد. آنگاه، پس از توضیح درباره روش مدل کردن مواد مورد استفاده، برای درستی آزمایی نتایج شبیه سازی، دو مقاله تازه منتشر شده در حوزه ...

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