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Cellphone radiofrequency radiation induced inflammatory response and oxidative stress in rat brain 手机射频辐射诱导大鼠脑内炎症反应和氧化应激
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) Pub Date : 2019-03-09 DOI: 10.23919/URSIAP-RASC.2019.8738629
Kumari Vandana Singh, R. Gautam, J. Nirala, R. Nanda, P. R.
{"title":"Cellphone radiofrequency radiation induced inflammatory response and oxidative stress in rat brain","authors":"Kumari Vandana Singh, R. Gautam, J. Nirala, R. Nanda, P. R.","doi":"10.23919/URSIAP-RASC.2019.8738629","DOIUrl":"https://doi.org/10.23919/URSIAP-RASC.2019.8738629","url":null,"abstract":"The exponential worldwide growth in the use of mobile phones has raised concerns regarding potential harmful effect of exposure to radiofrequency modulated electromagnetic field radiations. Of particular concern has been the effect on brain and hippocampus in specific. Oxidative stress has been proposed as the possible underlying mechanism responsible for radio frequency (RF) effects on nervous system. It has also been known that Stressful events affect the immune system by reducing the cellular response to mitogen stimulation, decreasing production of natural killer cell activity and altering levels of cytokines. An important and detrimental consequence of increased cytokine production is the induction of nitric oxide (NO) and reactive oxygen species. However reports on direct correlation between exposure to RF radiation and immune response has been inconsistent. Thus the present study was undertaken to determine if long term exposure to RF cause inflammatory cytokines mediated oxidative stress in brain.","PeriodicalId":344386,"journal":{"name":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115490566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Method of Lines Modeling of Surface Plasmon Modes Excited in Prism-Coupled Configurations 棱镜耦合结构中激发表面等离子体模的线建模方法
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) Pub Date : 2019-03-09 DOI: 10.23919/URSIAP-RASC.2019.8738460
S. Chattopadhyay, P. K. Saha
{"title":"Method of Lines Modeling of Surface Plasmon Modes Excited in Prism-Coupled Configurations","authors":"S. Chattopadhyay, P. K. Saha","doi":"10.23919/URSIAP-RASC.2019.8738460","DOIUrl":"https://doi.org/10.23919/URSIAP-RASC.2019.8738460","url":null,"abstract":"Dispersion of propagation constants of Surface Plasmon Polariton (SPP) modes at a metal-dielectric interface with the thickness of buffer layer in both the Otto and the Kretschmann-Raether configurations has been modeled using Method of Lines (MOL). The results reaffirm that in either configurations, the excited mode may not have the desired surface plasmon characteristics if the buffer-layer thickness is too small.","PeriodicalId":344386,"journal":{"name":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115620162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-satellite Global Satellite Mapping of Precipitation (GSMaP) - Design and Products - 多卫星全球降水卫星测绘(GSMaP) -设计和产品-
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) Pub Date : 2019-03-09 DOI: 10.23919/URSIAP-RASC.2019.8738594
T. Ushio, T. Mega, T. Kubota
{"title":"Multi-satellite Global Satellite Mapping of Precipitation (GSMaP) - Design and Products -","authors":"T. Ushio, T. Mega, T. Kubota","doi":"10.23919/URSIAP-RASC.2019.8738594","DOIUrl":"https://doi.org/10.23919/URSIAP-RASC.2019.8738594","url":null,"abstract":"Estimation of the global distribution of precipitation with high accuracy and resolution has long been one of the major scientific goals. Precipitation map on a global basis is important for modeling of the water cycle, maintaining the ecosystem environment, agricultural production, improvements of weather forecast precision, flood warning, and so on. GSMaP (Global Satellite Mapping of Precipitation) is a project aiming (1) to produce high-precision and high-resolution global precipitation map using satellite-borne microwave radiometer data, (2) to develop reliable microwave radiometer algorithms, and (3) to establish precipitation map techniques using multi-satellite data for GPM.","PeriodicalId":344386,"journal":{"name":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130312400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
A Global View of 3D Cloud Structure from a Decade of Space-borne Radar Measurements 从十年的星载雷达测量中获得三维云结构的全局视图
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) Pub Date : 2019-03-01 DOI: 10.23919/URSIAP-RASC.2019.8738668
T. Sarkar, S. Dey, D. Ganguly
{"title":"A Global View of 3D Cloud Structure from a Decade of Space-borne Radar Measurements","authors":"T. Sarkar, S. Dey, D. Ganguly","doi":"10.23919/URSIAP-RASC.2019.8738668","DOIUrl":"https://doi.org/10.23919/URSIAP-RASC.2019.8738668","url":null,"abstract":"Clouds influence the planet's energy and hydrological balance. Poorly resolved clouds in climate models produce an unacceptable discrepancy in the global heat and moisture transport. Robust studies quantifying the cloud in a 3-D observational framework is critical to resolve the aerosol-cloud-precipitation cycle and active remote sensing can prove to be very useful for this purpose. Here, we present the three dimensional global cloud climatology of individual cloud types using satellite based active radar measurement. We find that global mean cloud fractions of cumulus, stratocumulus-stratus (combined), altocumulus, altostratus, nimbostratus, cirrus and deep convective clouds from Cloudsat are 4.7%, 15.9%, 6.1%, 7.1%, 4.1%, 5.7% and 1.4% respectively. The work is expected to generate key strategic knowledge about characteristics of precipitating and non-precipitating clouds which will be useful to the modeling community trying to improve the climate models in the Indian monsoon region.","PeriodicalId":344386,"journal":{"name":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114980514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Gain Enhanced Multiband Antenna using SRRs with Defected Ground Structure 带有缺陷接地结构的srr增益增强多带天线
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) Pub Date : 2019-03-01 DOI: 10.23919/URSIAP-RASC.2019.8738605
Diptiranjan Samantaray, Somak Bhattacharyya, K. V. Srinivas
{"title":"A Gain Enhanced Multiband Antenna using SRRs with Defected Ground Structure","authors":"Diptiranjan Samantaray, Somak Bhattacharyya, K. V. Srinivas","doi":"10.23919/URSIAP-RASC.2019.8738605","DOIUrl":"https://doi.org/10.23919/URSIAP-RASC.2019.8738605","url":null,"abstract":"The performance of tapered shaped octagonal patch antenna embedded with split ring resonators (SRRs) in its square slots along with defected ground has been analyzed in this paper for multiband frequency applications. The designed antenna operates over three distinct frequencies viz., 3.31 GHz, 6.50 GHz and 12.01GHz with the respective fractional bandwidths of 19.6%, 8.6% and 29.8%. The maximum return loss of -57 dB has been achieved over the band 10.36-13.95 GHz while the maximum realized gain of 22 dB has been obtained at 12.07 GHz. The antenna exhibits endfire radiation pattern in its far-field characteristics. The proposed antenna finds its applications in defense and military, satellite communication, several medical applications like cancerous cell detection, tumor and microimaging in medical analysis for determination of radio waves and also in many communication fields.","PeriodicalId":344386,"journal":{"name":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115740262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Novel Approach For Radar PRI Classification Based on Features Estimation 基于特征估计的雷达PRI分类新方法
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) Pub Date : 2019-03-01 DOI: 10.23919/URSIAP-RASC.2019.8738194
Pawan Barnwal, Dhaval J. Upadhyay, S. Bera
{"title":"A Novel Approach For Radar PRI Classification Based on Features Estimation","authors":"Pawan Barnwal, Dhaval J. Upadhyay, S. Bera","doi":"10.23919/URSIAP-RASC.2019.8738194","DOIUrl":"https://doi.org/10.23919/URSIAP-RASC.2019.8738194","url":null,"abstract":"Pulse Repetition Interval (PRI) timing and its modulation types are significant features of any Radar to comprehend its capabilities and functionalities. In this paper, an algorithm has been proposed to classify PRI modulation by estimating features from time of arrival (ToA) and its difference (dToA) of a pulse radar. Performance of the proposed algorithm is also verified for different PRI modulations with different percentage of missing pulses. PRI modulation type classified covers Dwell and Switch (DS) of 2 to 64 level, Staggered PRI of 2 to 64 levels, Jittered PRI with 20% Gaussian deviation and Sliding PRI. Estimation of features is improved by selection of an optimal window of histogram. Level of staggered/ DS PRI has also been estimated using Kernel Density Estimator (KDE) with an epanechnikov window with length $N^{0.8}$ where, N is total count of dToA. Upon classification, PRI estimation for each modulation type is also estimated.","PeriodicalId":344386,"journal":{"name":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)","volume":"302 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116919692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
RRI Efficient Linear-array Imager: salient aspects RRI高效线性阵列成像仪:突出方面
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) Pub Date : 2019-03-01 DOI: 10.23919/URSIAP-RASC.2019.8738693
R. Balasubramanyam
{"title":"RRI Efficient Linear-array Imager: salient aspects","authors":"R. Balasubramanyam","doi":"10.23919/URSIAP-RASC.2019.8738693","DOIUrl":"https://doi.org/10.23919/URSIAP-RASC.2019.8738693","url":null,"abstract":"Recently, a new optics entitled Efficient Linear-array Imager [1] has been proposed to use radio receivers efficiently for imaging the skies. The new optics demonstrates that it is possible to trade instantaneous sensitivity to instantaneous field-of-view while conserving the $mathrm{A}Omega$ product. For a dish of size D fitted with N receivers, this product is $sim D ^ { 2 } N$. This can be rewritten as $2 left( D times frac { D } { N / 2 } right) times ( N / 2 ) ^ { 2 }$. The first part, $2 left( D times frac { D } { N / 2 } right)$, implies two orthogonal areas of elliptical cross section with an N/2 aspect ratio. The second part, $( N / 2 ) ^ { 2 }$, indicates the number of simultaneous beams formed with N receivers. Thus, the resultant configuration is two telescopes of elliptical cross sections laid in a cross-configuration, each fitted with N/2 receivers. Then, by cross correlating each set of receivers with the orthogonal set of receivers, one obtains the $( N / 2 ) ^ { 2 }$ beams.","PeriodicalId":344386,"journal":{"name":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117170092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dual-Band UHF Folded Dipole RFID Tag Antenna Loaded With Spiral Resonator 加载螺旋谐振器的双频超高频折叠偶极子RFID标签天线
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) Pub Date : 2019-03-01 DOI: 10.23919/URSIAP-RASC.2019.8738134
Bidisha Barman, S. Bhaskar, Ashutosh Kumar Singh
{"title":"Dual-Band UHF Folded Dipole RFID Tag Antenna Loaded With Spiral Resonator","authors":"Bidisha Barman, S. Bhaskar, Ashutosh Kumar Singh","doi":"10.23919/URSIAP-RASC.2019.8738134","DOIUrl":"https://doi.org/10.23919/URSIAP-RASC.2019.8738134","url":null,"abstract":"In this paper, a dual-band UHF RFID tag antenna operating at 867 MHz and 956 MHz has been proposed. Perturbation method is used to obtain dual-band response by loading a 2-turn spiral resonator (2-SR) to a single band folded dipole antenna (FDA) operating at 912 MHz. The 2-SR perturbs the electrical length of the FDA and splits the resonant frequency at 912 MHz into the two resonant frequencies of interest. Reflection coefficients of -13.25 dB and -13.34 dB have been recorded with corresponding read ranges of 5 m and 3.3 m in 866–869 MHz band and 950–956 MHz band respectively.","PeriodicalId":344386,"journal":{"name":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121020918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling of Propagation of Coronal Mass Ejections Using Interplanetary Scintillation Data 利用行星际闪烁数据模拟日冕物质抛射的传播
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) Pub Date : 2019-03-01 DOI: 10.23919/URSIAP-RASC.2019.8738547
P. Manoharan
{"title":"Modeling of Propagation of Coronal Mass Ejections Using Interplanetary Scintillation Data","authors":"P. Manoharan","doi":"10.23919/URSIAP-RASC.2019.8738547","DOIUrl":"https://doi.org/10.23919/URSIAP-RASC.2019.8738547","url":null,"abstract":"This talk reviews the interplanetary scintillation (IPS) technique, which allows for the determination of speed and density turbulence of the solar wind in the three-dimensional (3D) inner heliosphere. When sufficient number of scintillating sources are employed to suitably probe a given part of interplanetary space, IPS observations are powerful to study the ambient solar wind as well as to track coronal mass ejections (CMEs) in the distance range of Sun to Earth's orbit. A number of CMEs have been tracked over the entire Sun-Earth distance, by combining the white-light images from the LASCO/SOHO space mission and IPS measurements obtained from the Ooty Radio Telescope (ORT) and ISEE Multi-antenna system. Since the IPS observations at Ooty are on a grid of large number of radio sources, they provide image of disturbance associated with the CME at different distances from the Sun before its arrival at the near-Earth space. The results on the CME “speeddistance” evolution indicate a two-level deceleration: a low decline in speed at distances within or about 100 solar radii and a rapid decrease at larger distances from the Sun. However, the radial decline rates of speed, respectively within and above 100 solar radii, differ between different CMEs and suggest the involvement of input energy associated with the CME eruption in the propagation as well as the dynamics of the ambient solar wind. The typical linear size evolution of the CME with heliocentric distance suggests a pressure balance maintained between the CME driver gas and the ambient solar wind. Further, IPS estimates of density turbulence and speed have been used as inputs to the University of California, San Diego (UCSD) timedependent tomography to reconstruct the full 3D distributions of both solar wind speed and density throughout the inner heliosphere. The usefulness of IPS measurements is discussed on the possibility of forming a basic model to forecast the arrival of CMEs at 1 AU.","PeriodicalId":344386,"journal":{"name":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124920751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Some Aspects of Electromagnetic Waves Propagating in Nonlinear Media taking Gravity into account 考虑重力的电磁波在非线性介质中传播的若干问题
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) Pub Date : 2019-03-01 DOI: 10.23919/URSIAP-RASC.2019.8738599
M. Khulbe, H. Parthasarathy, M. Tripathy
{"title":"Some Aspects of Electromagnetic Waves Propagating in Nonlinear Media taking Gravity into account","authors":"M. Khulbe, H. Parthasarathy, M. Tripathy","doi":"10.23919/URSIAP-RASC.2019.8738599","DOIUrl":"https://doi.org/10.23919/URSIAP-RASC.2019.8738599","url":null,"abstract":"In this paper we propose to solve approximately using perturbation theory, Maxwell’s equations in general relativity ie in curved space-time (that describes gravitational effects ofmatter on the electromagnetic field) taking in addition account of the fact that the medium may be nonlinear, inhomogeneous and anisotropic that is described by a electromagnetic field dependent permittivity – permeability -conductivity tensor. We also propose a method for estimating under such circumstances, ie gravitational effects & inhomogeneity anisotropicity & nonlinearity of the medium into account, the surface current density induced on an antenna when an electromagnetic field is incident upon it. The entire formalism is based on the tensor calculus and covariant differentiating fundamental to the general theory of relativity.","PeriodicalId":344386,"journal":{"name":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123430757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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