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efficient FpGA implementation of AeS 128 bit for Ieee 802.16e mobile WiMax standards

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Circuits and Systems 2016年第4期7卷 371-380页

作者： p. Rajasekar dr. H. Mangalam Department of electronics and Communication engineering Kathir College of Engineering Coimbatore India Department of electronics and Communication engineering Sri Krishna College of Engineering and Technology Coimbatore India

In an advancement of communication field, wireless technology plays a predominant role in data transmission. In the timeline of wireless domain, Wi-Fi, Bluetooth, zigbee etc are some of the standards, which are being used in today’s wireless medium. In addition, the WiMax is introduced by Ieee in Ieee 802.16 for long distance communication, specifically 802.16e standard for mobile WiMax. It is an acronym of Worldwide Interoperability for Microwave Access. It is to be deliver wireless transmission with high quality of service in a secured environment. Since, security becomes dominant design aspect of every communication, a new technique has been proposed in wireless environment. privacy across the network and access control management is the goal in the predominant aspects in the WiMax protocol. especially, MAC sub layer should be evaluated in the security architecture. It has been proposed on cryptography algorithm AeS that require high cost. Under this scenario, we present the optimized AeS 128 bit counter mode security algorithm for MAC layer of 802.16e standards. To design a efficient MAC layer, we adopt the modification of security layers data handling process. As per the efficient design strategy, the power and speed are the dominant factors in mobile device. Since we concentrate mobile WiMax, efficient design is needed for MAC Security layer. Our proposed model incorporates the modification of AeS algorithm. The design has been implemented in Xilinx virtex5 device and power has been analyzed using Xpower analyzer. This proposed system consumes 41% less power compare to existing system.

关键词： decryption FpGA implementation electronic code book mode Galois Field Low power Architecture : AeS encryption

Ca-based materials derived from calcined cigarette butts for CO_(2)capture and thermochemical energy storage

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Journal of environmental Sciences 2024年第6期140卷 230-241页

作者： nabil Amghar Virginia Moreno pedro e.Sánchez-Jiménez Antonio perejón Luis A.pérez-Maqueda Instituto de Ciencia de Materiales de Sevilla C.S.I.C.-Universidad de SevillaC.Américo Vespucio4941092 SevillaSpain Instituto de Tecnología de Materiales(ITM) Universitat Politècnica de València(UPV)Plaza Ferrándiz y Carbonell 1AlcoyAlicante 03801Spain Departamento de Química Inorgánica Facultad de QuímicaUniversidad de Sevilla41012 SevillaSpain

Cigarette butts(CBs)are one of the most common types of litter in the *** to the toxic substances they contain,the waste generated poses a harmful risk to the environment,and therefore there is an urgent need for alternative solutions to landfill ***,this work presents a possible revalorization of this waste material,which implies interesting environmental *** were used as sacrificial templates for the preparation of CaO-based materials by impregnation with calcium and magnesium nitrates followed by flaming *** materials presented enhanced porosity for their use in the Calcium Looping process applied either to thermochemical energy storage or CO_(2)capture *** influence of the concentration of Ca and Mg in the impregnating solutions on the multicycle reactivity of the samples was *** improved multicycle performance was obtained in terms of conversion for both applications.

关键词： Cigarette butts Calcium-Looping CO_(2)Capture Thermochemical energy storage

Catalytic feasibility of Ce-doped LaCoO_(3) systems for chlorobenzene oxidation:An analysis of synthesis method

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Journal of Rare earths 2022年第6期40卷 897-905,I0002页

作者： Héctor Acosta pérez Carlos A.López Luis e.Cadús Fabiola n.Agüero Chemical Technology Research Institute(InTeQUI) UNSL-CONICETFaculty of Biochemical Chemistry and Pharmacy(UNSL)Almirante Brown 14555700San LuisArgentina

A family of Ce-doped LaCoO_(3) perovskites are presented as possible catalysts for Cl-VOCs *** materials with different contents of Ce were obtained through the citrate and the reactive grinding *** insertion of Ce in the original perovskite structure favours the presence of Co^(2+)/Co^(3+) and Ce^(3+)/Ce^(4+) redox pairs and a higher content of oxygen vacancies that enhances the catalytic performance in chlorobenzene combustion based on differential kinetics *** family obtained by the grinding method presents a performance as high as that synthesized by citrate ***,the reactive grinding is a feasible green chemistry alternative to obtain a catalyst with the same performance as that obtained from traditional ***,the stability of samples was evaluated under total combustion reaction conditions showing an excellent activity during 45 h time on stream.

关键词： Cl-VOCs perovskites Chlorobenzene Cerium Cobalt Rare earths

Collimated quasi-monochromatic beams of accelerated electrons in the interaction of a weak-contrast intense femtosecond laser pulse with a metal foil

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High power Laser Science and engineering 2013年第2期1卷 80-87页

作者： Yu.A.Malkov A.n.Stepanov D.A.Yashunin L.p.pugachev p.R.Levashov n.e.Andreev K.Yu.platonov A.A.Andreev Institute of Applied physics Russian Academy of Sciences ul. Ulyanova 46 603950 Nizhny Novgorod Russia Joint Institute of High Temperatures Russian Academy of Sciences Izhorskaya ul. 13 125412 Moscow Russia Federal State Unitary enterprise ‘‘Scientific and Industrial Corporation ‘Vavilov State Optical Institute’’’ Birzhevay liniya 12 St 199034 Petersburg Russia

We demonstrated experimentally the formation of monoenergetic beams of accelerated electrons by focusing femtosecond laser radiation with an intensity of 2×1017W/cm2onto the edge of an aluminum *** electrons had energy distributions peaking in the 0.2–0.8 MeV range with energy spread less than 20%.The acceleration mechanism related to the generation of a plasma wave as a result of self-modulation instability of a laser pulse in a dense plasma formed by a prepulse(arriving 12 ns before the main pulse)is ***-dimensional and two-dimensional particle in Cell(pIC)simulations of the laser–plasma interaction showed that effective excitation of a plasma wave as well as trapping and acceleration of an electron beam with an energy on the order of 1 MeV may occur in the presence of sharp gradients in plasma density and in the temporal shape of the pulse.

关键词： acceleration of electrons femtosecond laser radiation plasma wave self-modulation instability

Gate-Dependent nonlinear Hall effect at Room Temperature in Topological Semimetal GeTe

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Chinese physics Letters 2023年第7期40卷 63-67页

作者： n.n.Orlova A.V.Timonina n.n.Kolesnikov e.V.Deviatov Institute of Solid State physics of the Russian Academy of Sciences ChernogolovkaMoscow District2 Academician Ossipyan str.142432Russia

We experimentally investigate nonlinear Hall effect as zero-frequency and second-harmonic transverse voltage responses to ac electric current for topological semimetal GeTe.A thick single-crystal GeTe flake is placed on the Si/SiO_(2) substrate,where the p-doped Si layer serves as a gate *** confirm that electron concentration is not gate-sensitive in thick GeTe flakes due to the gate field screening by bulk *** contrast,by transverse voltage measurements,we demonstrate that the nonlinear Hall effect shows pronounced dependence on the gate electric field at room *** the nonlinear Hall effect is a direct consequence of a Berry curvature dipole in topological media,our observations indicate that Berry curvature can be controlled by the gate electric *** experimental observation can be understood as a result of the known dependence of giant Rashba splitting on the external electric field in *** possible applications,the zero-frequency gate-controlled nonlinear Hall effect can be used for the efficient broad-band rectification.

关键词： temperature. field. curvature

Growth of 4＂ diameter polycrystailine diamond wafers with high thermal conductivity by 915 MHz microwave plasma chemical vapor deposition

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plasma Science and Technology 2017年第3期19卷 93-97页

作者： A F pOpOVICH V G RALCHenKO V K BALLA A K MALLIK A A KHOMICH A p BOLSHAKOV D n SOVYK e e ASHKInAZI V Yu YUROV Institute of Radio engineering and electronics of Russian Academy of Sciences Fryazino 141190 Russia General physics Institute of Russian Academy of Sciences Moscow 119991 Russia Harbin Institute of Technology Harbin 150001 People's Republic of China national Research nuclear University MephI Moscow 115409 Russia Central Glass and Ceramic Research Institute Kolkata 700 032 India

polycrystalline diamond（pCD） films 100 mm in diameter are grown by 915 MHz microwave plasma chemical vapor deposition（MpCVD） at different process parameters,and their thermal conductivity（TC） is evaluated by a laser flash technique（LFT） in the temperature range of230-380 *** phase purity and quality of the films are assessed by micro-Raman spectroscopy based on the diamond Raman peak width and the amorphous carbon（a-C） presence in the *** and increasing dependencies for TC with temperature are found for high and low quality samples,***,as high as 1950 ± 230 W m-1 K-1 at room temperature,is measured for the most perfect material.A linear correlation between the TC at room temperature and the fraction of the diamond component in the Raman spectrum for the films is established.

关键词： thermal conductivity polycrystalline diamond microwave plasma chemical vapordeposition Raman spectroscopy

nanomechanical hydrodynamic force sensing using suspended microfluidic channels

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Microsystems & nanoengineering 2023年第3期9卷 95-102页

作者： Alberto Martín-pérez Daniel Ramos Optomechanics Lab Instituto de Ciencia de Materiales de Madrid(ICMMCSIC)3 Sor Juana Inés de la Cruz(Madrid)E-28049 MadridSpain

Microfluidics has demonstrated high versatility in the analysis of in-flow particles and can even achieve mechanical properties measurements of biological cells by applying hydrodynamic ***,there is currently no available technique that enables the direct measurement and tracking of these hydrodynamic forces acting on a flowing *** this work,we introduce a novel method for the direct measurement of the hydrodynamic force actuating on an in-flow particle based on the analysis of the induced resonance changes of suspended microchannel resonators(SMRs).This hydrodynamic force sensitivity depends on the device used;therefore,we considered the geometry and materials to advance this dependency on the SMR resonance frequency.

关键词： hydrodynamic applying flow

prediction of seakeeping in the early stage of conventional monohull vessels design using artificial neural network

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Journal of Ocean engineering and Science 2023年第4期8卷 344-366页

作者： p.Romero-Tello J.e.Gutiérrez-Romero B.Serván-Camas Departamento de Física Aplicada y Tecnología naval Universidad Politécnica de Cartagena(UPCT)CartagenaMurciaSpain Centre Internacional de Mètodes numèrics en enginyeria(CIMne) BarcelonaSpain

nowadays seakeeping is mostly analyzed by means of model testing or numerical *** require a significant amount of time and the exact hull geometry,and therefore seakeeping is not taken into account at the early stages of ship *** the main objective of this work is the development of a seakeeping prediction tool to be used in the early stages of ship *** tool must be fast,accurate,and not require the exact hull *** this end,an artificial intel-ligence(AI)algorithm has been *** algorithm is based on Artificial neural networks(Anns)and only requires a number of ship coefficients of *** methodology developed to obtain the predictive algorithm is presented as well as the database of ships used for training the *** data were generated using a frequency domain seakeeping code based on the boundary element method(BeM).Also,the AI predictions are compared to the BeM results using both,ship hulls included and not included in the *** a result of this work it has been obtained an AI tool for seakeeping prediction of conventional monohull vessels.

关键词： artificial neural database

Chromomagnetic dipole moments of light quarks in the bestest little Higgs model

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Chinese physics C 2024年第10期48卷 125-136页

作者： T.Cisneros-pérez e.Cruz-Albaro A.Y.Ojeda-Castañeda S.e.Solís-núñez Unidad Académica de Ciencias Químicas Universidad Autónoma de ZacatecasApartado Postal C-58598060 ZacatecasMexico Facultad de Física Universidad Autónoma de ZacatecasApartado Postal C-58098060 ZacatecasMexico

In this study,we investigated the anomalous Chromomagnetic Dipole Moment(CMDM),denoted as μ_(q)^(BLHM),of light quarks q=(u,c,d,s,b) within the framework of the Bestest Little Higgs Model(BLHM)as an extension of the Standard Model(SM).Our investigation encompassed novel interactions among the light quarks,heavy quark B,and heavy bosons (W'^(±),H^(±),φ^(±),η^(±))incorporating the extended Cabibbo-Kobayashi-Maskawa(CKM)matrix characteristic of the *** thoroughly explored the permissible parameter space,yielding a spectrum of CMDM values ranging from 10^(-10) to 10^(-3).

关键词： beyond standard model flavor physics chromomagnetic dipole light quarks