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Novel Design of UWB jeans Based Textile Antenna for Body-Centric Communications

Computer Systems Science & Engineering 2022年第9期42卷 1079-1093页

作者： Mohammad Monirujjaman Khan Bright Yeboah-Akowuah Kaisarul Islam Eric Tutu Tchao Sumanta Bhattacharyya Rajesh Dey Mehedi Masud Fahad Alraddady Department of Electrical and Computer Engineering North South UniversityDhaka1229Bangladesh Department of Computer Engineering Kwame Nkrumah University of Science and TechnologyKumasiGhana Electronics and Communication Engineering Cambridge Institute of TechnologyRanchiIndia Department of Electronics and Communication Engineering Brainware Group of Institutions-SDETKolkataIndia Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia Department of Computer Engineering College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia

This research presents an ultra-wideband (UWB) textile antenna designfor body-centric applications. The antenna is printed on a 1 mm thick denim substrate with a 1.7 relative permittivity. The jeans substrate is sandwiched between apartial ground plane and a radiating patch with a Q-shaped slot. The slotted radiating patch is placed above the substrate and measures 27.8 mm × 23.8 mm. In freespace, the antenna covers the ultra-wideband spectrum designated by the FederalCommunication Commission (FCC). Various parameters of the antenna designwere changed for further performance evaluation. Depending on the operating frequency, the antenna's realized gain varied from 2.7 to 5 dB. The antenna achievedhigh radiation efficiency with an omnidirectional radiation pattern. A parametricstudy was performed in research on varying antenna substrates and other components of the antenna. The three outermost layers of the human body are used tomodel a human phantom for on-body simulation. After that, the antenna wasplaced at five different distances from the phantom. The findings demonstrate thatat close distances to the phantom, the antenna's gain and efficiency at lower frequencies are reduced. The antenna's radiation efficiency and gain were muchhigher at higher frequencies for distances greater than 6 mm. Compared to freespace, the antenna's radiation pattern was more omnidirectional, especially athigher frequencies. This antenna is novel, compact and has an ultra wide bandwidth, a maximum of 94.60% radiation efficiency and a 5 dBi gain that will makeit a good candidate for body-centric communications.

关键词： Ultra-wideband body-centric communication on-body textile jeans slotted-patch WBAN

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The jeans Equation Generalization for the Rotating Universe

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International Journal of Astronomy and Astrophysics 2014年第4期4卷 614-619页

作者： Leonid M. Chechin Aigerim T. Ibraimova Astrophysical Institute Named After V.G. Fessenkov Almaty Kazakhstan

The generalization of jeans equation in expanding and rotating Universe is given. We found the generalized frequency of baryonic substrate oscillations in the rotating Universe. In doing this, two cases were considered: the generalized wave vector coincides with the jeans wave vector and second case, when the generalized wave vector tends to zero.

关键词： jeans Equations Rotating Universe

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星系螺旋结构三维密度波的流体动力学理论(Ⅰ)——局部解及局部jeans稳定性的讨论

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力学学报 1980年第3期 232-242页

作者：徐建军中国科学院力学研究所

本文是作者的盘状星系三维密度波工作的第一部分.文中给出了在厚度参数ε及准单色波参数ε_*的一级近似下的波传播方程及其局部近似解,并讨论了星盘厚度对局部jeans稳定性判据的影响.这些结果是进一步建立整体模式解理论的准备.

关键词：局部解流体动力学 jeans 方程组联立方程密度波旋涡结构星系螺旋结构

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黑鲸HLA jeans等六大品牌成为2019年KPL年度合作伙伴

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电子竞技 2019年第6期 6-6页

一句话:既是一次肯定,也是一次大考。3月6日,2019年KPL春季赛开赛前的发布会上公布vivo、上汽大众、5无糖口香糖、黑鲸HLAjeans、统一冰红茶等六大品牌成为KPL的年度合作伙伴。作为最受当下年轻人喜爱的竞技体育赛事之一,KPL成为了年轻... 详细信息

一句话:既是一次肯定,也是一次大考。3月6日,2019年KPL春季赛开赛前的发布会上公布vivo、上汽大众、5无糖口香糖、黑鲸HLAjeans、统一冰红茶等六大品牌成为KPL的年度合作伙伴。作为最受当下年轻人喜爱的竞技体育赛事之一,KPL成为了年轻用户品牌营销的新战场。

关键词： KPL 合作伙伴 HLA jeans

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GAS jeans——谦逊的张扬

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明日风尚 2011年第4期 75-75页

GAS jeans的诞生1984年,Claudio Grotto在威尼斯旁的裘磐诺镇创立了GASjeans品牌,他融合了曾经协助母亲打理男士服饰用品店的经验以及本人对新兴服装和流行趋势的洞悉。GAS,jeans倡导"忠于本质"、"感性"、"热情"与"和蔼"的品牌哲学。

关键词：流行趋势 GAS jeans 意大利设计首款基础元素全手工针织服装流行度洗水中所

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Escape and Stand of the Pluto Atmosphere

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Communications in Theoretical Physics 2002年第7期38卷 125-127页

作者： GAO Chong-Yi School of Physical Science and Technology Lanzhou University Lanzhou 730000 China

Molar mass μmin of the lightest gas, which will exist "forever" in the atmosphere at the planet surface,can be evaluated by jeans rule. The μmin of Pluto is 17.3 g@ mol-1. It is evident that both N2 and CO can be major atmospheric composition at the Pluto surface, and will exist "forever". CH4 can only be escaping slowly from Pluto atmosphere, and still holds quite a proportion in current Pluto atmosphere. However, it will not escape from Titan (or Jupiter, Saturn) atmosphere largely, and will exist "forever". Given the quantitylevelof partial pressure of CH4 in Pluto and Titan (or Jupiter, Saturn) original atmosphere is the same, it will be clear that the current partial pressure of CH4 in Pluto surface atmosphere is 10-3 Pa.

关键词： planet atmosphere, Pluto atmosphere, jeans rule, atmospheric composition, escape

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Miniaturized Novel UWB Band-Notch Textile Antenna for Body Area Networks

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Computer Systems Science & Engineering 2022年第3期40卷 1183-1198页

作者： Mohammad Monirujjaman Khan Arifa Sultana Mehedi Masud Gurjot Singh Gaba Hesham A.Alhumyani Department of Electrical and Computer Engineering North South UniversityBashundharaDhaka1229Bangladesh Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia School of Electronics&Electrical Engineering Lovely Professional UniversityPunjabIndia Department of Computer Engineering College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia

This paper presents the design and analysis of a miniaturized and novel wearable ultra-wideband(UWB)band-notch textile antenna for Body Area Networks(BANs).The major goal of building the antenna for wearable applications with band notch in X-band is to reject the downlink band(7.25 to 7.75 GHz)of satellite communication in the UWB frequency ranges of 3.1–10.6 GHz to keep away from *** Simulation Technology(CST)TM Microwave Studio,which is user-friendly and reliable,was used to model and simulate the *** radiating element of the antenna is designed on jeans’textile substrate,which has a relative permittivity of *** thickness of the jeans’fabric substrate has been considered to be 1 *** loss,gain,bandwidth,impedance,radiation,and total efficiency,and radiation patterns are presented and *** antenna is simulated placed on the three layers of the human body model,and the on-body results are summarized in comparison with free *** and analysis indicate that this antenna has good band-notch characteristics in the frequency range of 7.25 GHz to 7.75 *** parametric study varying the relative permittivity of jeans’fabric substrate of this antenna is also *** addition,effects on the antenna parameters of variation of ground plane size have been *** antenna is 25 mm×16 mm×1.07 mm in total *** reveal that this antenna achieves the design goal and performs well both in free space and on the body.

关键词： UWB band notch textile antenna wearable antenna on-body BANs jeans X-band CST

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Why Do the Main Sequence Stars Have Similar Chemical Composition?

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International Journal of Astronomy and Astrophysics 2012年第1期2卷 37-38页

作者： Stanislaw Halas Tomasz Durakiewicz Institute of Physics Maria Curie-Sklodowska University Lublin Poland Los Alamos National Laboratory MPA-CMMS Group Los Alamos USA

In this short note we have reconsidered the jeans criterion for gravitational contraction of a gas nebula at different temperatures, from the present-day background radiation temperature (2.8 K) to those which existed at the early stage of the Universe. We demonstrate that the initial mass of quasars cannot be of the order of single galaxy masses, but rather 106 solar mass only. If they have larger masses, it must be the result of subsequent accretion process. Nevertheless quasars, formed prior to the stars, were the immediate source of the elements heavier than helium.

关键词： Stars Quasars Background Radiation jeans Criterion Gravitational Contraction Nebulae

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秀色可餐的Mudd

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中国服装（北京） 2003年第9期 21-21页

在香港时尚汇展中，一场Mudd jeans的牛仔秀格外动人心弦。这一来自美国，如今在香港设立远东总部，在广州和上海设有世界级展示厅的国际知名牛仔品牌，为我们带来纯美国式的休闲时尚概念。

关键词：牛仔品牌 Mudd jeans 牛仔服装休闲时尚设计风格

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