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Low-energy electronic states of carbon nanocones in an electric field

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Nano-Micro Letters 2010年第2期2卷 121-125页

作者： Jun-Liang Chen Ming-Horng Su Chi-Chuan Hwang Jian-Ming Lu Chia-Chang Tsai Department of Mechanical Engineering Wu Feng Institute of Technology Department of Fire Science Wu Feng Institute of Technology Department of Engineering Science National Cheng Kung University Advanced Networking Business Unit National Center for High-Performance Computing National Applied Research Laboratories Institute of Atomic and Molecular Sciences Academia Sinica

The low-energy electronic states and energy gaps of carbon nanocones in an electric field are studied using a single-?-band tight-binding model. The analysis considers five perfect carbon nanocones with disclination angles of 60°, 120°, 180°, 240° and 300°, respectively. The numerical results reveal that the low-energy electronic states and energy gaps of a carbon nanocones are highly sensitive to its geometric shape(i.e. the disclination angle and height), and to the direction and magnitude of an electric field. The electric field causes a strong modulation of the state energies and energy gaps of the nanocones, changes their Fermi levels, and induces zero-gap transitions. The energy-gap modulation effect becomes particularly pronounced at higher strength of the applied electric field, and is strongly related to the geometric structure of the nanocone.

关键词： Low-energy electronic states Carbon Nanocones Electric field

3D Mobile Augmented Reality Interface for Laboratory Experiments

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International Journal of Communications, Network and System Sciences 2016年第4期9卷 67-76页

作者： Clement Onime Olatunde Abiona Information and Communication Technology Section Abdus Salam International Centre for Theoretical Physics Trieste Italy Department of Computer Information Systems Indiana University Northwest Gary IN USA

In fields such as science and engineering, virtual environment is commonly used to provide replacements for practical hands-on laboratories. Sometimes, these environments take the form of a remote interface to the physical laboratory apparatus and at other times, in the form of a complete software implementation that simulates the laboratory apparatus. In this paper, we report on the use of a semi-immersive 3D mobile Augmented Reality (mAR) interface and limited simulations as a replacement for practical hands-on laboratories in science and engineering. The 3D-mAR based interfaces implementations for three different experiments (from micro-electronics, power and communications engineering) are presented;the discovered limitations are discussed along with the results of an evaluation by science and engineering students from two different institutions and plans for future work.

关键词： Mobile Augmented Reality Laboratory Experiments 3D

A Critical Comparison of Mildly Acidic versus Alkaline Zinc Batteries

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Accounts of Materials Research 2023年第4期4卷 299-306页

作者： Vinod Mathew Noah B.Schorr Balaji Sambandam Timothy N.Lambert Jaekook Kim Chonnam National University Gwangju 61186South Korea Sandia National laboratories AlbuquerqueNew Mexico 87185United States

Aqueous rechargeable batteries are cost-effective,easy to fabricate,and safe,deliver high energy output,and employ stable water-based electrolytes compared to organicbased lithium-ion batteries(LIBs).Aqueous Zn electrochemistry,specifically,has attracted researchers since the *** Zn is a nearly ideal anode owing to its low cost(ca.2 USD kg^(−1)),existing supply chain,environmental benignity,relative safety,and high stability in water[−0.76 V vs standard hydrogen electrode(SHE)],as compared to Li.^(1−3) The high theoretical capacity(2e−@820 mAh g^(−1))and low polarizability(6×10^(−8)Ωm)further motivate Zn-based battery development,especially for stationary storage.2,4 Alkaline Zn batteries(AZBs)and neutral/mildly acidic Znion batteries(MZIBs)are proposed as rivals to the established Pb-acid and LIBs owing to their competitive theoretical energy densities(∼200−400 Wh L^(−1)).The efficiency of these inexpensive and safe battery technologies is dependent on the cathode type,Zn anode formulation,separator materials,and the electrolyte type(liquid,gel,solid state)and *** AZBs and MZIBs have commonalities,including Zn dendrite formation at high capacity utilization and inherent low voltage(Zn battery<3 V

关键词： battery Zinc electrolyte

AG Channel Measurements and Characteristics Analysis in Hilly Scenarios for 6G UAV Communications

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China Communications 2022年第11期19卷 32-46页

作者： Chongyang Yu Yu Liu Hengtai Chang Jingfan Zhang Mengjiao Zhang Peter Poechmueller Chengxiang Wang School of Microelectronics Shandong UniversityNo.1500Shunhua RoadGaoxin DistrictJinan 250101China National Mobile Communications Research Laboratory School of Information Science and EngineeringSoutheast UniversityNo.2SipailouXuanwu DistrictNanjing 210096China Purple Mountain laboratories No.9Mozhou East RoadJiangning DistrictNanjing 211111China

As an important part of sixth generation(6G)integrated space-air-ground-sea networks,unmanned aerial vehicle(UAV)communications have aroused great attention and one of its typical application scenarios is the hilly *** related UAV air-ground(AG)channel characteristics analysis is crucial for system design and network evaluation of future UAV communications in hilly *** this paper,a recently conducted channel measurements campaign in a hilly scenario is presented,which is conducted at the center frequencies of 2.585 GHz and 3.5 GHz for different flight *** on the measurement data,some key channel characteristics are analyzed,including path loss(PL),shadow fading(SF),Rician K-factor,root mean square(RMS)delay spread(DS),and temporal auto-correlation function(ACF).Finally,the comparison of typical channel characteristics under circular and straight trajectories is *** related results can provide a theoretical reference for constructing future UAV communication system in hilly scenarios.

关键词： UAV communications channel measurements channel characteristics hilly scenarios 6G

Benefit of Selecting Number of Active Mesh Routers in Disaster Oriented Wireless Mesh Network

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Journal of Software Engineering and Applications 2012年第12期5卷 36-41页

作者： Panu Avakul Hiroki Nishiyama Nei Kato Yoshitaka Shimizu Tomoaki Kumagai Graduate School of Information Sciences Tohoku UniversitySendai Japan 2NTT Network Innovation laboratories NTT Corporation Yokosuka Japan

Communications is one of the most critical factors in disaster recovery process. However, after a major disaster, existing communications infrastructures may be heavily damaged or even completely unusable. It is necessary that communicationsare to be promptly restored to the disaster area, which is the goal of our national project. The project aims to build three tiers wireless mesh network from remaining wireless access points in order to provide communications services to the disaster area. This work introduces a unique multiple tiers wireless mesh network project. In addition, this work also illustrates merits in optimizing the number of mesh routersin order to achieve the optimum performance by presenting both theoretical and simulation results of a specific scenario of multiple tiers wireless mesh network.

关键词： Wireless Mesh Network Throughput Interference Collision WiFi

Bibliometric analysis of Journal of Plant Ecology during 2017-2021

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Journal of Plant Ecology 2022年第6期15卷 1316-1323页

作者： Pu Wang Lijuan Liu Bi-Cheng Dong Wen-Hao Zhang Bernhard Schmid Center for Documentation and Information Institute of BotanyChinese Academy of SciencesBeijing 100093China School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing 100083China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China Department of Geography Remote Sensing LaboratoriesUniversity of Zurich8057 ZurichSwitzerland

Journal of Plant Ecology(JPE)was founded in *** is sponsored by the Botanical Society of China and the Institute of Botany,Chinese Academy of Sciences,and published by Oxford University Press,*** publishes diverse types of articles that fall into the broad scope of plant ecology,including plant ecophysiology,population ecology,community ecology,ecosystem ecology,landscape ecology,conservation ecology,evolutionary ecology,theoretical ecology and global change ecology.

关键词： landscape ecology. ecology

LOW ENERGY INELASTIC COLLISION PROCESSES:SURFACE REACTIONS IN SPACE

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Nuclear Science and Techniques 1990年第Z1期1卷 40-45页

作者： N.H.Tolk R.G.Albridge A.V.Barnes M.A.Albert C.N.Sun D.P.Russell J.C.Tully P.Nordlander P.M.Savundararaj D.Harper J.Benit Center for Atomic and Molecular Physics at Surfaces Department of Physics and Astronomy Vanderbilt University Nashville TN. 37235 U.S.A. AT & T Bell laboratories Murray HillN.J. Rutgers University New Brunswick N.J.

The electonic transition rates in low-energy ion-surface interaction were studied by emplaying tilted-foil and grazing incidence geometries, and the linear and circular polarizations of light emitted were observed, re... 详细信息

关键词： Desorption Electronic transition (DIET) Grazing incidence Tilted-foil nentralization

Multivariate MOF for optimizing atmospheric water harvesting

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Green Energy & Environment 2022年第4期7卷 575-577页

作者： Ao Ma Hengjiang Cong Hexiang Deng College of Chemistry and Molecular Sciences Wuhan UniversityWuhan430072China Hubei Yangtze Memory laboratories Wuhan430205China Engineering Research Center of Organosilicon Compounds and Materials-Ministry of Education College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072China Key Laboratory of Biomedical Polymers-Ministry of Education College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072China

Atmospheric water harvesting offers a powerful and promising solution to address the problem of global freshwater *** the past decade,significant progress has been achieved in utilizing hydrolytically stable metal-organic frameworks as recyclable water-sorbent materials under low relative humidity,especially in those arid ***,Yaghi's group has employed a combined crystallographic and theoretical technique to decipher the water filling mechanism in MOF-303,where the polar organic linkers rather than the inorganic units of MOF are demonstrated as the key ***,the hydrophilic strength of the water-binding pocket in MOFs can be optimized through the approach of multivariate modulations,resulting in enhanced water harvesting properties.

关键词： Atmospheric water harvesting Metal-organic framework Multivariate strategy Single-crystal X-ray diffraction Water-sorption dynamics

Evaluating the Effects of Crystallinity on Drug Release Behaviour in Itraconazole- or Miconazole-Loaded PLGA Microparticles Prepared Using a Co-Grinding Method

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Pharmacology & Pharmacy 2023年第9期14卷 348-362页

作者： Kazuhiro Matsuura Honami Kojima Miyako Yoshida Takahiro Uchida Formulation Technology Research laboratories Daiichi Sankyo Co. Ltd. Hiratsuka Japan Faculty of Pharmaceutical Science Mukogawa Women’s University Nishinomiya Japan

This study aimed to prepare and characterize itraconazole (ITCZ)- or miconazole (MCZ)-loaded poly (lactide-co-glycolide) (PLGA) microparticles (MP) using a co-grinding method with ball milling, which is a solvent-free and convenient procedure. PLGA MP was prepared by grinding for 60 min, and the fixed theoretical drug loading was set at 9.1% and 16.7% for both drugs. The obtained loading efficiency for both drugs was estimated to be approximately 100%. The average diameters of the drug-loaded PLGA MP were approximately 20 - 35 μm. Powder X-ray diffraction (PXRD) or differential scanning calorimetry (DSC) confirmed amorphization of ITCZ and MCZ in ITCZ- or MCZ-loaded PLGA MP in all formulations. The drug release percentage from 9.1%-loaded ITCZ-PLGA7505 MP at 24 h was almost 50%, which was higher than that of ITCZ powder. The drug release percentage from MCZ-loaded PLGA7505 MP at 4 h was over 80%, which was higher than that of MCZ powder. This enhancement of release rate is caused by the amorphization of ITCZ or MCZ in the PLGA matrix. MCZ-loaded PLGA7510 MP showed a sustained release profile up to 24 h, suggesting that MCZ exists in an amorphous form in the PLGA matrix;however, the release rate declined owing to the large molecular weight of PLGA. Therefore, the release enhancement of antifungal drugs loaded on PLGA MP could be achieved by their amorphization using a co-grinding method with ball milling.

关键词： Co-Grinding Method Ball Milling Poly (Lactide-co-Glycolide) Itraconazole Miconazole Amorphization