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Photo-Induced Spin dynamics in Nanoelectronic devices

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Chinese Physics Letters 2012年第10期29卷 248-252页

作者： mina d.asham Walid A.Zein Adel H.Phillips Faculty of Engineering Benha UniversityBenhaEgypt Faculty of Engineering Ain-Shams UniversityCairoEgypt

The present research is devoted to the investigation of electron spin transmission through a nanoelectronic *** device is modeled as nonmagnetic semiconductor quantum dot coupled to two diluted magnetic semiconductor *** spin transport characteristics through such a device are investigated under the effect of an ac-field of a wide range of *** present result shows a periodic oscillation of the conductance for both the cases of parallel and antiparallel spin *** oscillations are due to *** for spin polarization and giant magneto-resistance show the coherency *** present research might be useful for developing single spin-based quantum bits(qubits)required for quantum information processing and quantum spin-telecommunication.

关键词： property quantum electronic

A Review of State-of-the-art Flexible Power Point Tracking Algorithms in Photovoltaic Systems for Grid Support:Classification and Application

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 1-21页

作者： mina Haghighat Mehdi Niroomand Hossein dehghani Tafti Christopher d.Townsend Tyrone Fernando the department of Electrical Engineering University of IsfahanIsfahanIran the department of Electrical Electronic and Computer EngineeringUniversity of Western AustraliaCrawley WA 6009Australia

To maximize conversion efficiency,photovoltaic(PV)systems generally operate in the maximum power point tracking(MPPT)***,due to the increasing penetra tion level of PV systems,there is a need for more developed control functions in terms of frequency support services and voltage control to maintain the reliability and stability of the power ***,flexible active power control is a manda tory task for grid-connected PV systems to meet part of the grid ***,a significant number of flexible pow er point tracking(FPPT)algorithms have been introduced in the existing *** purpose of such algorithms is to real ize a cost-effective method to provide grid support functional ities while minimizing the reliance on energy storage *** paper provides a comprehensive overview of grid support functionalities that can be obtained with the FPPT control of PV systems such as frequency support and volt-var *** of these grid support functionalities necessitates PV sys tems to operate under one of the three control strategies,which can be provided with FPPT *** three control strate gies are classified as:①constant power generation control(CP GC),②power reserve control(PRC),and③power ramp rate control(PRRC).A detailed discussion on available FPPT algo rithms for each control strategy is also *** paper can serve as a comprehensive review of the state-of-the-art FPPT algorithms that can equip PV systems with various grid support functionalities.

关键词： Maximum power point tracking(MPPT) flexi ble power point tracking(FPPT) power reserve control(PRC) power ramp rate control(PRRC) low voltage ride-through(LVRT) constant power generation(CPG)

Correlation between the molecular structure and transcis isomerization characteristics of azobenzenes

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Science China Chemistry 2011年第12期54卷 1955-1961页

作者： HAN mina HONdA Takumu department of Chemistry and department of Electronic Chemistry Tokyo Institute of Technology

Photochemical and thermal isomerization of various azobenzenes was systematically investigated to understand the correlation between the molecular structure and trans → cis isomerization characteristics of azobenzenes. A blue shift in π-π absorption band of ortho-alkylated azobenzenes （1o and 2o） was observed together with a reduction in molar extinction coefficient （e） in comparison with both meta-alkylated azobenzenes （4m and 5m） and 7p lacking the meta and ortho substituents. For orthoalkylated azobenzene, photochemical trans-to-cis isomerization and thermal back cis-to-trans isomerization in solution oc- curred slowly when compared with 4m, 5m and 7p. The half-life time of the cis form of 20 was found to be 380 h, which is about 8-50 times longer than those of comparable 4m, 5m （43-13 h） and 7p （7 h）. Furthermore, comparison of the molecular structure and isomerization characteristics of azobenzene thiol （20 and 5m） self-assembled monolayers on flat gold surfaces indicates that the trans-to-cis photoconversion in monolayer systems is influenced by steric hindrance and strong intermoleculax interaction between azobenzene units.

关键词： azobenzene isomerization lifetime of cis form molecular structure

Fuzzy coloured petri nets‐based method to analyse and verify the functionality of software

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CAAI Transactions on Intelligence Technology 2023年第3期8卷 863-879页

作者： mina Chavoshi Seyed Morteza Babamir department of Software Engineering University of KashanKashanIran

Some types of software systems,like event‐based and non‐deterministic ones,are usually specified as rules so that we can analyse the system behaviour by drawing inferences from firing the ***,when the fuzzy rules are used for the specification of non‐deterministic behaviour and they contain a large number of variables,they constitute a complex form that is difficult to understand and infer.A solution is to visualise the system specification with the capability of automatic rule *** this study,by representing a high‐level system specification,the authors visualise rule representation and firing using fuzzy coloured Petri‐***,several fuzzy Petri‐nets‐based methods have been presented,but they either do not support a large number of rules and variables or do not consider significant cases like(a)the weight of the premise's propositions in the occurrence of the rule conclusion,(b)the weight of conclusion's proposition,(c)threshold values for premise and conclusion's propositions of the rule,and(d)the certainty factor(CF)for the rule or the conclusion's *** considering cases(a)-(d),a wider variety of fuzzy rules are *** authors applied their model to the analysis of attacks against a part of a real secure water treatment *** another real experiment,the authors applied the model to the two scenarios from their previous work and analysed the results.

关键词： fuzzy logic software engineering verification

Cobalt-based magnetic Weyl semimetals with high-thermodynamic stabilities

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npj Computational Materials 2021年第1期7卷 41-48页

作者： Wei Luo Yuma Nakamura Jinseon Park mina Yoon Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN 37831USA department of Physics and Astronomy University of TennesseeKnoxvilleTN 37916USA

Recent experiments identified Co_(3)Sn_(2)S_(2) as the first magnetic Weyl semimetal(MWSM).Using first-principles calculation with a global optimization approach,we explore the structural stabilities and topological electronic properties of cobalt(Co)-based shandite and alloys,Co_(3)MM’X_(2)(M/M’=Ge,Sn,Pb,X=S,Se,Te),and identify stable structures with different Weyl *** a tight-binding model,for the first time,we reveal that the physical origin of the nodal lines of a Co-based shandite structure is the interlayer coupling between Co atoms in different Kagome layers,while the number of Weyl points and their types are mainly governed by the interaction between Co and the metal atoms,Sn,Ge,and *** Co_(3)SnPbS_(2) alloy exhibits two distinguished topological phases,depending on the relative positions of the Sn and Pb atoms:a three-dimensional quantum anomalous Hall metal,and a MWSM phase with anomalous Hall conductivity(~1290Ω^(−1) cm^(−1))that is larger than that of Co_(2)Sn_(2)S_(2).Our work reveals the physical mechanism of the origination of Weyl fermions in Co-based shandite structures and proposes topological quantum states with high thermal stability.

关键词： stability alloy magnetic

Surfactant assisted solvothermal synthesis of ZnO nanoparticles and study of their antimicrobial and antioxidant properties

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Journal of Materials Science & Technology 2018年第6期34卷 1035-1043页

作者： mina Zare K. Namratha K. Byrappa d.M. Surendra S. Yallappa Basavaraj Hungun Centre for Materials Science and Technology Vijnana Bhavan University of Mysore 570006 India dOS in Earth Science University of Mysore Vijnana Bhavan Manasagangotri Mysore 570 006 India dept. of Chemistry Gokhale Centenary College Ankola 581314 Uttara Kannada India department ofBiotechnology KLE Technological University Hubballi 580031 India

This study demonstrated a solvothermal method of growth of three different morphologies of zinc oxide nanoparticles （ZnO NPs）： i） flower-like nanorod and nanoflakes, ii） assembled hierarchical structure, and iii） nano granule. Oleic acid （C18H3402）, gluconic acid （C6H1207） and tween 80 （C64H124026） were used as surfactant/capping/reducing agent for the formation of different morphologies of nanoparticles. The as-synthesized ZnO NPs were characterized by different physicochemical techniques such as UV-vis （UV-vis） spectroscopy, X-ray diffraction （XRd）, fourier transform infrared spectroscopy （FFIR）, field emission scanning electron microscopy （FE-SEM）, energy dispersive X-ray （EdX） analysis and dynamic light scattering （dLS） studies. Further, the antioxidant and antimicrobial activity of these nanostructures was evaluated. The antioxidant activity of these nanostructures was assessed via 2,2-diphenyl,1-1 picrylhydrazyl （dPPH）, 2,2＇-azino-bis （3-ethylbenzothiazoline-6-sulphonic acid）（ABTS） and H202 free radical scavenging activity. The in vitro antimicrobial activity of the obtained nanostructures was demonstrated against both gram negative （Escherichia coil） and gram positive （Staphylococcus aureus） bacterial genera. This study revealed antioxidant and antimicrobial properties of different structures ofZnO NPs suggesting their biomedical and industrial applications.

关键词： ZnO nanoparticles Solvothermal method Nanorods Nanoflakes[k]Nano granule Antioxidant & antimicrobial studies

Hepatocellular carcinoma locoregional therapies:Outcomes and future horizons

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World Journal of Gastroenterology 2021年第43期27卷 7462-7479页

作者： mina S Makary Stuart Ramsell Eric Miller Eliza W Beal Joshua d dowell department of Radiology The Ohio State University Wexner Medical CenterColumbusOH 43210United States department of Radiation Oncology The Ohio State University Wexner Medical CenterColumbusOH 43210United States department of Surgery The Ohio State University Wexner Medical CenterColumbusOH 43210United States department of Radiology Northwest RadiologySt.Vincent HealthIndianapolisIN 46260United States

Hepatocellular carcinoma(HCC)is the most common primary cancer of the liver and has an overall five-year survival rate of less than twenty *** patients with unresectable disease,evolving liver-directed locoregional therapies provide efficacious treatment across the spectrum of disease stages and via a variety of catheter-directed and percutaneous *** of locoregional therapies in HCC may include curative intent in early-stage disease,bridging or downstaging to surgical resection or transplantation for early or intermediate-stage disease,and local disease control and palliation in advanced-stage *** review explores the outcomes of chemoembolization,bland embolization,radioembolization,and percutaneous ablative *** is also given to prognostic factors related to each of the respective techniques,as well as future directions of locoregional therapies for HCC.

关键词： Hepatocellular carcinoma Bland embolization Chemoembolization Radioembolization Transarterial embolization Thermal ablation Locoregional therapy

Cartilage and facial muscle tissue engineering and regeneration： a mini review

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Bio-design and Manufacturing 2018年第2期1卷 115-122页

作者： Michael del Monico Mohammadreza Tahriri mina d. Fahmy Hamed Ghassemi daryoosh Vashaee Lobat Tayebi Marquette University School of dentistry Milwaukee WI 53233 USA Eye Research Center Farabi Eye Hospital Tehran University of Medical Sciences Tehran Iran department of Electrical and Computer Engineering North Carolina State University Raleigh NC 27606 USA

Cartilage and facial muscle tissue provide basic yet vital functions for homeostasis throughout the body, making human survival and function highly dependent upon these somatic components. When cartilage and facial muscle tissues are harmed or completely destroyed due to disease, trauma, or any other degenerative process, homeostasis and basic body functions consequently become negatively affected. Although most cartilage and cells can regenerate themselves after any form of the aforementioned degenerative disease or trauma, the highly specific characteristics of facial muscles and the specific structures of the cells and tissues required for the proper function cannot be exactly replicated by the body itself. Thus, some form of cartilage and bone tissue engineering is necessary for proper regeneration and function. The use of progenitor cells for this purpose would be very beneficial due to their highly adaptable capabilities, as well as their ability to utilize a high diffusion rate, making them ideal for the specific nature and functions of cartilage and facial muscle tissue. Going along with this, once the progenitor cells are obtained, applying them to a scaffold within the oral cavity in the affected location allows them to adapt to the environment and create cartilage or facial muscle tissue that is specific to the form and function of the area. The principal function of the cartilage and tissue is vascularization, which requires a specific form that allows them to aid the proper flow of bodily functions related to the oral cavity such as oxygen flow and removal of waste. Facial muscle is also very thin, making its reproduction much more possible. Taking all these into consideration, this review aims to highlight and expand upon the primary benefits of the cartilage and facial muscle tissue engineering and regeneration, focusing on how these processes are performed outside of and within the body.

关键词： Soft tissue regeneration Cartilage tissue engineering Muscle tissue engineering Facial regeneration

Yttrium-90 microsphere selective internal radiation therapy for liver metastases following systemic chemotherapy and surgical resection for metastatic adrenocortical carcinoma

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World Journal of Clinical Oncology 2018年第1期9卷 20-25页

作者： mina S Makary Lawrence S Krishner Evan J Wuthrick Mark P Bloomston Joshua d dowell division of Vascular and Interventional Radiology Department of Radiology the Ohio State University Comprehensive Cancer Center division of Medical Oncology Department of Internal Medicine the Ohio State University Comprehensive Cancer Center department of Radiation Oncology the Ohio State University Comprehensive Cancer Center division of Surgical Oncology Department of Surgery and James Cancer Hospital and Richard Solove Research Institute the Ohio State University Comprehensive Cancer Center

Adrenocortical carcinoma(ACC)is a rare malignancy with generally poor outcomes and limited treatment *** surgical resection can be curative for early local disease,most patients present with advanced ACC owing to nonspecific *** those patients,treatment options include systemic chemotherapy and locoregional therapies including radiofrequency ablation and transarterial *** present the first reported case of utilizing yttrium-90 microsphere selective internal radiation therapy(SIRT)in combination with first line EdP-M(Etoposide,doxorubicin,Cisplatin,Mitotane)chemotherapy and debulking surgical primary tumor resection for treatment of metastatic *** complete radiologic response has been maintained after twelve months with resolution of clinical *** findings prompt the need for further consideration and studies to elucidate the role of SIRT in combination with systemic and surgical treatment for metastatic ACC.

关键词： Adrenocortical carcinoma Hepatic metastases Radioembolization Yttrium-90