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Anush Baskaran,Sushant Ramesh,Ronnie D. Caytiles,N.Ch.S.N Iyengar 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.7
It is well-known, that one of the key characteristics of a Vehicular Ad-hoc Network (VANET) is the randomized movement of nodes (in this case, automobiles). For this to transpire, the routing protocols in the VANET have to swiftly respond to the network topology change with the purpose of guaranteeing successful data packet delivery. Hence, multiple routing pathways are therefore arranged in order to improve on reliability and on limited bandwidth which further lead to advanced transmission. In this paper, a minor modification has been made to the AODV routing protocol in the form of an accumulator, which inherently, helps to reduce the number of data packets present in the network at any instant which consequently, decreases the data traffic and eases the congestion in any network. VANETs have been receiving greater attention from both, industries as well as academic researchers and our proposed idea will help to improve its efficiency.
Electrostatic Stabilized InP Colloidal Quantum Dots with High Photoluminescence Efficiency
Mnoyan, Anush N.,Kirakosyan, Artavazd Gh.,Kim, Hyunki,Jang, Ho Seong,Jeon, Duk Young American Chemical Society 2015 Langmuir Vol.31 No.25
<P>Electrostatically stabilized InP quantum dots (QDs) showing a high luminescence yield of 16% without any long alkyl chain coordinating ligands on their surface are demonstrated. This is achieved by UV-etching the QDs in the presence of fluoric and sulfuric acids. Fluoric acid plays a critical role in selectively etching nonradiative sites during the ligand-exchange process and in relieving the acidity of the solution to prevent destruction of the QDs. Given that the InP QDs show high luminescence without any electrical barriers, such as long alkyl ligands or inorganic shells, this method can be applied for QD treatment for application to highly efficient QD-based optoelectronic devices.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/langd5/2015/langd5.2015.31.issue-25/acs.langmuir.5b00847/production/images/medium/la-2015-00847v_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/la5b00847'>ACS Electronic Supporting Info</A></P>
Preparation of black diatom colloids for solar-to-steam generation
배기현,구본준,( Anush Mnoyan ),이규복,이경진 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
The vapour generation system from solar power using photothermal converters has been considered as powerful techniques for advanced renewable energy needs. In order to apply various steam generation device using photothermal converters, the tailored photothermal converters are required for high efficiency of vapour generation. The adequate structure engineering methods and surface treatments are helpful to improve steam generation efficiency. Herein, we propose colloidal type of photothermal converters using diatom frustules for solar-to-steam generation system. The diatom frustules provide porous that has advantage in terms of mass transfer. Additionally, several coating process via vapor deposition polymerization provide broadband absorption, magnetic, and self-water floating properties to colloidal diatom photothermal converter. Under sun light irradiation, the prepared black diatom photothermal converter shows high efficiency of vapour generation via photothemal conversion.
3D Visual Activity Assessment Based on Natural Scene Statistics
Kwanghyun Lee,Moorthy, Anush Krishna,Sanghoon Lee,Bovik, Alan Conrad IEEE 2014 IEEE TRANSACTIONS ON IMAGE PROCESSING - Vol.23 No.1
<P>One of the most challenging ongoing issues in the field of 3D visual research is how to perceptually quantify object and surface visualizations that are displayed within a virtual 3D space between a human eye and 3D display. To seek an effective method of quantification, it is necessary to measure various elements related to the perception of 3D objects at different depths. We propose a new framework for quantifying 3D visual information that we call 3D visual activity (3DVA), which utilizes natural scene statistics measured over 3D visual coordinates. We account for important aspects of 3D perception by carrying out a 3D coordinate transform reflecting the nonuniform sampling resolution of the eye and the process of stereoscopic fusion. The 3DVA utilizes the empirical distortions of wavelet coefficients to a parametric generalized Gaussian probability distribution model and a set of 3D perceptual weights. We conducted a series of simulations that demonstrate the effectiveness of the 3DVA for quantifying the statistical dynamics of visual 3D space with respect to disparity, motion, texture, and color. A successful example application is also provided, whereby 3DVA is applied to the problem of predicting visual fatigue experienced when viewing 3D displays.</P>
Black Diatom Colloids toward Efficient Photothermal Converters for Solar-to-Steam Generation
Bae, Kihyeon,Ku, Bon Jun,Kim, Youngjin,Mnoyan, Anush,Lee, Kyubock,Lee, Kyung Jin American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.4
<P>Steam generation from solar power using converters has attracted significant research attention in recent years as an alternative form of energy conversion from solar energy. Rationally designed photothermal converters are essential to increase the efficiency of steam generation. Here, we propose a novel colloidal type of photothermal converter based on a frustule skeleton, which is a naturally designed colloid containing through-pore structures. Several coating processes were used to provide broadband absorption, magnetic, and water-floating properties without deteriorating pore structures, through vapor deposition polymerization of polypyrrole, weak base treatment, and additional vapor deposition polymerization of polystyrene. The prepared colloidal photothermal converter showed superior efficiency for steam generation under sunlight irradiation.</P> [FIG OMISSION]</BR>
A Novel approach for Wearable Antenna Design for Biomedical Applications
K. Rani Rudrama,G. Catherine Christina,R. Teja,P. Niteesh Kumar,M. Anush,K. Srinivasa Rao 한국전기전자재료학회 2022 Transactions on Electrical and Electronic Material Vol.23 No.6
A low profile wearable antenna for the different applications of Body Area Networks is presented. Wearable microstrip patch antenna for development in different applications in the area of WBAN. Many breakthroughs of wearable devices, together including their flexibility, suggest a real time monitoring with WBAN technology of the human vital signs such as pulse rates, blood pressure, and body temperature. The proposed antenna works in the operating frequency of 2.45 GHz which falls under the industrial, scientific and medical (ISM) frequency band. The designed antenna uses the flexible Polyimide substrate with a relative permittivity of 3.5 and thickness of 0.1 mm. The antenna is tested on a three layered human phantom model. The antenna parameters of return loss, VSWR, Specific Absorption Rate (SAR), gain and low value are established, while Return lost at 2.45 GHz is approximately -23.22 dB with a VSWR value of 2.45 GHz being 1.13, which determines improved matching impedance. The 2D and 3D gain, and radiation patterns have been determined. The designed antenna is simulated with a three layered phantom model using a High Frequency Structure Simulator (HFSS).The simulated model is tested using Network Analyzer and Anechoic chamber and fabricated.
셀룰로오스와 금/은 나노입자 기반의 광 흡수체를 이용한 태양광 수증기 발생
구본준(Bon-Jun Ku),김현중(Hyunjoung Kim),김동현(Dong Hyun Kim),아누쉬 므노얀(Anush Mnoyan),이규복(Kyubock Lee) 한국고분자학회 2020 폴리머 Vol.44 No.3
물의 국소 및 계면 가열을 특징으로 하는 새로운 유형의 고효율 태양광-수증기 발생 장치는 기존의 태양에너지 이용 해수담수화기술의 저효율 한계를 극복하는 효과적인 방법으로 주목받고 있다. 본 연구에서 우리는 세 가지 주요 구성 요소들을 포함한 효과적인 태양광-수증기 발생 광흡수체(CMNF-NP)를 고안하였다. 광열 변환 재료인 Au/Ag 나노입자와 나노입자 고정 및 친수성 특성을 가진 셀룰로오스 나노 섬유(CNF) 및 기계적 강도를 향상시키기 위한 보강제로서 셀룰로오스 마이크로 섬유(CMF)를 사용하였다. CNF에 5.17 wt%의 CMF가 첨가된 CMNF는 CNF에 비하여 인장강도가 2.9배 향상된 반면 광학 투명도는 2% 저하되었다. CMNF 지지체를 기반으로 합성한 광 흡수체인 CMNF-NP의 경우 CMF 첨가에 따라 증기발생 효율은 2.3% 저하되었지만 향상된 기계적 강도로 인해 태양광-수증기 발생장치에 활용하는데 있어서 실용성을 높일 수 있을 것으로 본다. A new type of solar-driven steam generation (SDSG) for desalination and water purification, characterized by local and interfacial heating of water using nanostructured light absorbers, has recently drawn great attention, which overcomes the limitation of low efficiency of conventional SDSG, a bulk water heating system. Here we devise the cellulose micro/nanofiber and Au/Ag nanoparticle light absorber (CMNF-NP) for SDSG, which is composed of Au/Ag nanoparticles as the photothermal material, cellulose nanofiber (CNF) as the main substrate for immobilization of nanoparticles, and cellulose microfiber (CMF) as the fillers for enhancing mechanical property. For the substrate, the addition of 5.17 wt% of CMF in CNF (CMNF) enhanced tensile strength by 2.9 times and reduced optical transparency by 2%. Although the steam generation efficiency of CMNF-NP was reduced by 2.3% by the addition of CMF, the trade-off is worth to make considering the application of this light absorber into practical SDSG system.