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Colored ultrathin hybrid photovoltaics with high quantum efficiency

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light(Science & Applications) 2014年第1期3卷 36-42页

作者： Kyu-Tae lee Jae Yong lee Sungyong Seo l Jay Guo Department of Electrical Engineering and Computer Science The University of MichiganAnn ArborMichigan 48109USA

Most current solar panels are fabricated via complex processes using expensive semiconductor materials,and they are rigid and heavy with a dull,black *** a result of their non-aesthetic appearance and weight,they are primarily installed on rooftops to minimize their negative impact on building *** large surfaces and interiors of modern buildings are not efficiently utilized for potential electric power ***,we introduce dual-function solar cells based on ultrathin dopant-free amorphous silicon embedded in an optical cavity that not only efficiently extract the photogenerated carriers but also display distinctive colors with the desired angle-insensitive ***-energy-harvesting colored signage is ***,a cascaded photovoltaics scheme based on tunable spectrum splitting can be employed to increase power efficiency by absorbing a broader band of light *** study pioneers a new approach to architecturally compatible and decorative thin-film photovoltaics.

关键词： color filters nanocavities organic–inorganic nanostructures photovoltaics spectrum splitting

Surface Activation of Plane and Curved Automotive Polymer Surfaces by Using a Fittable Multi-Pin DBD Plasma Source

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Plasma Science and Technology 2014年第6期16卷 593-597页

作者： Jrn HEINE Roland DAMM Christoph GERHARD Stephan WIENEKE Wolfgang VIl University of Applied Sciences and Arts Laboratory of Laser and Plasma TechnologyVon-Ossietzky-Stra?e 99 37085 Gttingen Germany Fraunhofer Institute for Surface Engineering and Thin Films Application Center for Plasma and Photonic Von-Ossietzky-Stra?e 99 37085 Gttingen Germany

In this work, surface activation of automotive polymers using atmospheric pressure plasmas was investigated. The aim was to increase the polar fraction of the surface energy of both plane and convex polymer devices with a radius in the range of 30 mm. For this purpose, a fittable low temperature atmospheric pressure plasma source based on capacitively coupled multi-pin electrodes was set up and applied. Each single electrode generates a treatment spot of approximately 2 cm2 with a tunable power density of up to 1.4 W/cm2. The surface energy was evaluated by contact angle measurements. After treatment at a low energy density of 1.01 J/cm2, the polar fraction of the surface energy of the investigated polymers was increased by a factor of 3.3 to 132, depending on the polymer materials. It was shown that by applying the presented fittable plasma source, this effect is independent of the surface radius of the polymer sample.

关键词： surface activation atmospheric pressure plasma adhesion lacquering surfaceenergy

Superconductivity in antiperovskites

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npj Computational Materials 2022年第1期8卷 1424-1433页

作者： Noah Hoffmann Tiago F.T.Cerqueira Jonathan Schmidt Miguel A.l.Marques Institut für Physik Martin-Luther-Universität Halle-WittenbergD-06099HalleGermany CFisUC Department of PhysicsUniversity of CoimbraRua Larga3004-516CoimbraPortugal

We present a comprehensive theoretical study of conventional superconductivity in cubic antiperovskites materials with composition XYZ_(3) where X and Z are metals,and Y is H,B,C,N,O,and *** starting point are electron–phonon calculations for 397 materials performed with density-functional perturbation *** 43%of the materials are dynamically unstable,we discovered 16 compounds close to thermodynamic stability and with T_(c) higher than 5 *** these results to train interpretable machine-learning models,leads us to predict a further 57(thermodynamically unstable)materials with superconducting transition temperatures above 5 K,reaching a maximum of 17.8 K for ***,the models give us an understanding of the mechanism of superconductivity in *** combination of traditional approaches with interpretable machine learning turns out to be a very efficient methodology to study and systematize whole classes of materials and is easily extendable to other families of compounds or physical properties.

关键词： properties theory perovskite

Anticancer and cytotoxic properties of the latex of Calotropis procera in a transgenic mouse model of hepatocellular carcinoma

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World Journal of Gastroenterology 2006年第16期12卷 2517-2522页

作者： Tenzin Choedon Ganeshan Mathan Soneera Arya Vijay l Kumar Vijay Kumar Virology Group International Centre for Genetic Engineering and BiotechnologyAruna Asaf Ali MargNew Delhi-110067India Department of Pharmacology All India Institute of Medical SciencesAnsari NagarNew Delhi-110029India

AIM： To evaluate the anticancer property of the dried latex （Dl） of Calotropis procera, a tropical medicinal plant, in the X15-myc transgenic mouse model of hepatocellular carcinoma and to elucidate its mechanism of action in cell culture. METHODS： The young transgenic mice were orally fed with the aqueous suspension of Dl （400 mg/kg for 5 d/wk） for 15 wk and their liver was examined for histopathological changes at 20 wk. Serum levels of vascu- lar endothelial growth factor （VEGF） were also measured in these animals. To characterize the active fraction, Dl was extracted with petroleum ether followed by methanol. The methanolic extract was sub-fractionated on a silica gel G column using a combination of non-polar and polar solvents and eleven fractions were obtained. Each fraction was analysed for cytotoxic effect on hepatoma （Huh7） and non-hepatoma （COS-1） cell lines and nontransformed hepatocytes （AMl12） using tetrazolium （MTT） assay. Finally, the mechanism of cell death was investigated by measuring the levels of Bcl2, caspase 3 and DNA fragmentation. RESUlTS： Dl treatment of mice showed a complete protection against hepatocarcinogenesis. No adverse effect was observed in these animals. The serum VEGF level was significantly lowered in the treated mice as compared to control animals. Cell culture studies revealed that the methanolic extract of Dl as well as its fraction 8 induced extensive cell death in both Huh-7 and COS-1 cells while AMl12 cells were spared. This was accompanied by extensive fragmentation of DNA in Huh-7 and COS-1 cells. No change in the levels of canonical markers of apoptosis such as Bcl2 and caspase 3 was observed. CONClUSION： Dl of C. procera has the potential for anti-cancer therapy due to its differentJable targets and non-interference with regular pathway of apoptosis.

关键词： Calotropis procera Transgenic mice Hepatocellular carcinoma Cytotoxicity Anticancer agent Differential killing

Ozone forming potential and sulfur effects on in-use vehicles of the metropolitan area of Mexico City

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第3期7卷 463-471页

作者： SCHIFTER I. DíAZ l. lOPEZ-SAlINAS E. Instituto Mexicano del Petróleo Estudios Ambientales Eje Central Lázaro Cárdenas No. 152 San Bartolo Atepehuacan México D.F. 07730 Mexico

The largest urban areas of Mexico cities have witnessed high levels of air pollution in the past few decades. The most important air pollutants are ozone and paniculate matter with levels that are still far above current air quality standard. In this work we studied exhaust and evaporative emissions of Mexico City metropolitan area （MAMC） vehicles using fuels in which sulfur content was varied from 89×10^-6 to 817×10^-6, and calculated the ozone forming potential of emissions as well as the specific reactivity of the exhaust for each average fleet-fuel combinations. Data on emission levels were compared to those obtained in 2000 for the same vintage of vehicles. The almost twofold increase in emissions found could be due to degradation of the exhaust emissions control systems.

关键词： Fuel formulation Ozone forming potential Vehicles emissions Mexico

Design of Optical Filter Using Bald Eagle Search Optimization Algorithm

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Intelligent Automation & Soft Computing 2023年第4期36卷 1215-1226页

作者： l.Jegan Antony Marcilin N.M.Nandhitha Research Scholar Department of ECESathyabama Institute of Science and TechnologyChennai600119India

Controlled thermonuclear reactors require consistent monitoring of plasma in the toroidal *** working conditions of such machines can be monitored by analyzing its *** wavelengths such as 656.3,486.1,464.7 nm are quite signiﬁcant which are used for health monitoring of thermonuclear *** optical thinﬁlmﬁlters which work on construc-tive and destructive interference are the ideal ***ﬁlters are multi-layered with a pair of high and low refractive index dielectric ***ﬁcantly high transmission index at the desired wavelength and relatively low transmission at the other wavelengths are *** this as the objective,it is necessary to design theﬁ*** optimization techniques are used for identifying the suitable design of theﬁ*** choose the parameter combination that provides the most excellent performance,optimization of the design para-meters is *** goal of this work is to improve the optical bandﬁlter using the Bald eagle search optimization(BES)*** ideal design is determined by assessing several characteristics such as thickness,refractive index,Full-Width at Half-Maximum(FWHM),and the impact of choosing optical properties,which increases transmission ***,an alternate multi-layer stack with 28,30,and 32 layers is created by altering the thickness while keeping the dielectric substances high and low refractive indices *** adjusting the thickness of each layer,the BES algorithm achieves the best practical *** proposed method is implemented using MATlAB and the outcomes show the efﬁcacy of the proposed *** transmittance,reﬂectance,and FWHM using the pro-posed BES are found to be 99.9356%,0.065%,and 1.2 nm respectively.

关键词： Optical filter dielectricmaterial bandpassfilter baldeagle optimization algorithm thickness and refractive index

The evolving landscape in the therapy of acute myeloid leukemia

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Protein & Cell 2013年第10期4卷 735-746页

作者： Grace l.Peloquin Yi-Bin Chen Amir T.Fathi Massachusetts General Hospital Cancer Center Harvard Medical SchoolBostonMA 02114USA

Acute myeloid leukemia(AMl)is a heterogeneous clonal disorder of myeloid precursors arrested in their matura-tion,creating a diverse disease entity with a wide range of responses to historically standard treatment *** signifi cant progress has been made in character-izing and individualizing the disease at diagnosis to op-timally inform those affected,progress in treatment to reduce relapse and induce remission has been limited thus *** addition to a brief summary of the factors that shape prognostication at diagnosis,this review attempts to expand on the current therapies under investigation that have shown promise in treating AMl,including hy-pomethylating agents,gemtuzumab ozogamicin,FlT3 ty-rosine kinase inhibitors,antisense oligonucleotides,and other novel therapies,including aurora kinases,mTOR and PI3 kinase inhibitors,PIM kinase inhibitors,HDAC inhibitors,and IDH targeted *** these,and undoubtedly many others in the future,it is the hope that by combining more accurate prognostication with more effective therapies,patients will begin to have a different,and more complete,outlook on their disease that allows for safer and more successful treatment strategies.

关键词： acute myeloid leukemia hypomethylating FlT3 gemtuzumab ozogamicin

Serelaxin increases the antifibrotic action of rosiglitazone in a model of hepatic fibrosis

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World Journal of Gastroenterology 2017年第22期23卷 3999-4006页

作者： Robert G Bennett Ronda l Simpson Frederick G Hamel Research Service Nebraska-Western Iowa Health Care System Department of Internal Medicine University of Nebraska Medical Center

To determine the effect of combined serelaxin and rosiglitazone treatment on established hepatic *** fibrosis was induced in mice by carbon tetrachloride administration for 6 wk, or vehicle alone (nonfibrotic mice). For the final 2 wk, mice were treated with rosiglitazone, serelaxin, or both rosiglitazone and serelaxin. Serum liver enzymes and relaxin levels were determined by standard methods. The degree of liver collagen content was determined by histology and immunohistochemistry. Expression of type I collagen was determined by quantitative PCR. Activation of hepatic stellate cells was assessed by alpha-smooth muscle actin (SMA) levels. liver peroxisome proliferator activated receptor-gamma coactivator 1 alpha (PGC1α) was determined by Western *** of mice with CCl4 resulted in hepatic fibrosis as evidenced by increased liver enzyme levels (AlT and AST), and increased liver collagen and SMA. Monotherapy with either serelaxin or rosiglitazone for 2 wk was generally without effect. In contrast, the combination of serelaxin and rosiglitazone resulted in significantly improved AlT levels (P l liver collagen content as determined by Sirius red staining revealed that only combination treatment was effective in reducing total liver collagen (P lts were supported by immunohistochemistry for type I collagen, in which only combination treatment reduced fibrillar collagen levels (P level of hepatic stellate cell activation was modestly, but significantly, reduced by serelaxin treatment alone, but combination treatment resulted in significantly lower SMA levels. Finally, while hepatic fibrosis reduced liver PGC1α levels, the combination of serelaxin and rosiglitazone resulted in restoration of PGC1α protein *** combination of serelaxin and rosiglitazone treatment for 2 wk was effective in significantly reducing established hepatic fibrosis, providing a potential

关键词： Relaxin Peroxisome proliferator-activated receptors liver cirrhosis liver diseases Fibrosis

Method for determining the best frequency band for eavesdropping the display image of a PC

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The Journal of China Universities of Posts and Telecommunications 2013年第4期20卷 93-98页

作者： DU Yu-lei lü Ying-hua ZHANG Jin-ling ZHANG Nan School of Telecommunication Engineering Beijing University of Posts and Telecommunications

The display image of the video display unit （VDU） can be reconstructed by receiving and analyzing the unexpected electromagnetic noise emanated from a personal computer system. This fact is one of the information leakage threats in information security. Therefore, in order to choose the best frequency range for receiving the electromagnetic compromising emanations form a PC display effectively and quickly, a method based on the correlation power analysis （CPA） and the common equipments is proposed. Firstly, the frequency spectrum of 10 MHz to 1 GHz is measured about 10 times respectively when the PC is displaying the white-black vertical strips image and black image. The frequency range which contains the display information can be obtained through the CPA. And then, the special image signal is searched around the dot frequency and harmonics. If the special signal disappears when displaying the total black image, it can be judged to be the real special signal. Finally, the best receiving frequency range can be chosen by comprehensive considering the results of CPA and the signal to noise ratio （SNR） of the special image signal. In order to check the validity of the chosen frequency range, eavesdropping experiments are carried out. The results demonstrate that the selected frequency range can retrieve the higher quality image than other frequency bands.

关键词： electromagnetic secure compromising emanations CPA eavesdropping TEMPEST