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Evidence for structural phase transitions and large effective band gaps in quasi-metallic ultra-clean suspended carbon nanotubes

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Nano Research 2013年第10期6卷 736-744页

作者： Shun-Wen Chang Rohan dhall moh Amer Kentaro Sato Riichiro Saito Stephen Cronin department of Physics and Astronomy University of Southern California Los Angeles CA 90089 USA department of Electrical Engineering University of Southern California Los Angeles CA 90089 USA department of Chemistry University of Southern California Los Angeles CA 90089 USA department of Physics Tohoku University Sendai 980-8578 Japan

We report evidence for a structural phase transition in individual suspended metallic carbon nanotubes by examining their Raman spectra and electron trans- port under electrostatic gate potentials. The current-gate voltage characteristics reveal anomalously large quasi-metallic band gaps as high as 240 meV, the largest reported to date. For nanotubes with band gaps larger than 200 meV, we observe a pronounced m-shape profile in the gate dependence of the 2d band （or G＇ band） Raman frequency. The pronounced dip （or softening） of the phonon mode near zero gate voltage can be attributed to a structural phase transition （SPT） that occurs at the charge neutrality point （CNP）. The 2d band Raman intensity also changes abruptly near the CNP, providing further evidence for a change in the lattice symmetry and a possible SPT. Pronounced non-adiabatic effects are observed in the gate dependence of the G band Raman mode, however, this behavior deviates from non-adiabatic theory near the CNP. For nanotubes with band gaps larger than 200 meV, non-adiabatic effects should be largely suppressed, which is not observed experimentally. This data suggests that these large effective band gaps are primarily caused by a SPT to an insulating state, which causes the large modulation observed in the conductance around the CNP. Possible mechanisms for this SPT are discussed, including electron-electron （e.g., mott） and electron-phonon （e.g., Peierls） driven transitions.

关键词： carbon nanotube Raman spectroscopy phase transition bandgap energy

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Simplified methods for Eigenvalue Assignment

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Advances in Pure mathematics 2015年第7期5卷 383-389页

作者： Omar moh’d El-Basheer El-Ghezawi Electrical Engineering department The University of Jordan Amman Jordan

A state feedback method of reduced order for eigenvalue assignment is developed in this paper. It offers immediate assignment of m eigenvalues, with freedom to assign the remaining n-m eigenvalues. The method also enjoys a systematic one-step application in the case where the system has a square submatrix. Further simplification is also possible in certain cases. The method is shown to be applicable to uncontrollable systems, offering the simplest control law when having maximum uncontrollable eigenvalues.

关键词： Eigenvalue Assignment Pole Placement Recursive methods

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Perceived Trust and Payment methods: An Empirical Study of markaVIP Company

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International Journal of Communications, Network and System Sciences 2015年第11期8卷 409-427页

作者： mahmoud maqableh Ra’ed moh’d Taisir masa’deh Rifat O. Shannak Khalid m. Nahar management Information Systems Faculty of Business The University of Jordan Amman Jordan Computer Science Faculty of Information Technology and Computer Science Yarmouk University Irbid Jordan

This empirical study focused on investigating the perceived trust surrogated by a number of hy-pothesized factors and its effect on the choice of method of payment. The data were collected using a questionnaire, as the instrument for the primary data collection, with total collected back responses of 214 from customers of markaVIP. Structural equation modeling technique was used to fully analyze the data in order to determine what level of the relationship between the constituting factors of the perceived trust and the method of payment. The main findings were related to confirming the seven main hypotheses of the research that were related to testing if some factors were important to forming perceived trust by customers. Four factors (reputation, security, familiarity, and ease of use) were found to have a positive effect and the remaining three were not (privacy, size and usefulness). In addition, having perceived trust meant no preference to any method of payment by the customers.

关键词： E-Payment Perceived Trust EPS E-Commerce Security Structural Equation modeling

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地下储气库注采循环过程中储层干化问题研究

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石油钻探技术 2018年第4期46卷 1-8页

作者：鲁洪江杨洪志 moh’d m.Amro 何勇明徐伟鲁杰 m.Szabries 成都理工大学能源学院四川成都610059 中国石油西南油气田分公司四川成都610051 弗莱贝格工业大学钻井与流体采矿研究所萨克森弗莱贝格09599

地下储气库在注采循环过程中,井周围区域会发生储层干化,这会对储气库的正常运行产生影响。为此,在分析储层干化机理的基础上,基于大张坨储气库储层参数及地下温度压力条件,建立了单井控制区域的组分模型并模拟储气库周期性注采气过程... 详细信息

地下储气库在注采循环过程中,井周围区域会发生储层干化,这会对储气库的正常运行产生影响。为此,在分析储层干化机理的基础上,基于大张坨储气库储层参数及地下温度压力条件,建立了单井控制区域的组分模型并模拟储气库周期性注采气过程。模拟结果表明:井周围储层干化的区域会逐年扩大,半径甚至超过百米;储层干化主要发生在注气周期,回采周期对储层的干化作用轻微;储层干化的速率及波及区域的大小取决于注采井的年循环气量及注入和采出天然气中水蒸气含量的差异;不同回采周期采出的天然气中水蒸气的含量呈现规律性变化,从开始接近干气逐渐升高到地下温度压力条件下饱和水蒸气含量,且该过程逐年后延。该研究结果为深入研究储层干化现象对储气库正常运营的影响奠定了基础。

关键词：储气库储层干化天然气含水量含水饱和度数值模拟组分模型

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Review and measuring the Efficiency of SQL Injection method in Preventing E-mail Hacking

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International Journal of Communications, Network and System Sciences 2012年第6期5卷 337-342页

作者： Ahmed A. m. Sharadqeh As'ad mahmoud Alnaser Omar Al Heyasat Ashraf Abdel-Karim Abu-Ein Hazem (moh'd Said) Hatamleh Computer Engineering department Al-Balqa’ Applied University Salt Jordan Computer Engineering department Faculty of Engineering Technology Al-Balqa’ Applied University Amman Jordan Computer Science department Ajloun University College Al-Balqa’ Applied University Ajloun Jordan

E-mail hackers use many methods in their work, in this article, most of such efficient methods are demonstrated and compared. different methods and stages of such methods are listed here, in order to reveal such methods and to take care of them but the most common discussed method in this paper is SQL method. SQL injection is a type of security exploit in which the attacker adds SQL statements through a web application's input fields or hidden parameters to gain access to resources or make changes to data. It is found that the SQL is an efficient way in preventing E-mail hacking and its efficiency reaches about 80%. The method of SQL injection can be considered as an efficient way comparing with other methods.

关键词： E-mail Hackers SQL Security

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The Effect of Epoxy Concentration and Fibre Loading on the mechanical Properties of ABS/Epoxy-Coated Kenaf Fibre Composites

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Open Journal of Composite materials 2015年第2期5卷 41-48页

作者： Hafsat R. Saliu U. S. Ishiaku m. K. Yakubu E. G. Kolawole S. S. Adefila m. B. Abu Bakar Z. A. moh’d Ishak department of Textile Science and Technology Ahmadu Bello University Zaria Nigeria department of Chemical Engineering Ahmadu Bello University Zaria Nigeria School of materials and mineral Resources Engineering Engineering Campus Universiti Sains Malaysia Penang Malaysia

In this work, thermosetting resin, epoxy and fibre loading were used in optimizing the strength at which ABS/epoxy coated kenaf fibre (EKF) composites would perform apparently during mechanical stress. Kenaf bast fibres were resin coated before incorporated into engineering thermoplastic ABS at its processing temperature (230°C), cured in-situ at internal mixer and later compression moulded at 210°C under 65 kg/cm2pressure. The results showed the optimum level of tensile strength with thermoset and fibre loading as well as increase in strong interfacial bonding while the hardness values increased with increasing thermosetting and fibre contents. Both the tensile and flexural modulus apparently increased as the fibre contents increased.

关键词： Thermosetting Resin Kenaf Fibre Engineering Thermoplastic ABS

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SATB2表达模式有助于卵巢转移性结直肠或阑尾肿瘤与卵巢原发性黏液性或子宫内膜样肿瘤的鉴别

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临床与实验病理学杂志 2016年第5期32卷 527-527页

作者： moh m Krings G Ates d 许文静(摘译) 余英豪(审校) 不详南京军区福州总医院病理科福州350025 解放军第四七六医院病理科福州350002

由于部分卵巢外的转移性肿瘤可显示出相似的显微镜下特点及免疫表型特征，给卵巢黏液性肿瘤的确诊带来困难，如原发于结直肠、阑尾、胃、胰腺、子宫内膜样腺癌的转移可与卵巢原发性黏液性囊腺瘤、交界性黏液性肿瘤及黏液腺癌相似。

关键词：卵巢黏液性肿瘤子宫内膜样腺癌转移性肿瘤阑尾肿瘤卵巢外原发性结直肠表达模式

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Epidemiological and Histological Aspects of Women Genital Cancers in Cote d’Ivoire

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Open Journal of Obstetrics and Gynecology 2014年第9期4卷 516-523页

作者： Kouamé Justin N’dah Brahima doukoure Emile Troh N’Guessan Alphonse Aman Kouakou Emmanuel Koffi Arthur didier Kouamé Ahoua Benjamin Effi Ahoua Francois de Salès d’Horpock mohénou Isidore Jean-marie diomande Laboratory of Pathology University Hospital of CocodyAbidjanCôte d’Ivoire department of Pathology Saint-Louis HospitalParisFrance Laboratory of Pathology University Hospital of BouakeBouakeCôte d’Ivoire Laboratory of Pathology University Hospital of TreichvilleAbidjanCôte d’Ivoire department of Obstetrical Gynecology University Hospital of CocodyAbidjanCôte d’Ivoire

Genital cancers in women play an important role in cancer pathology in the developing countries. Objectives: This study aimed at clarifying the epidemiological and histopathological aspects of woman genital cancers in C?te d’Ivoire. materials and methods: This was a retrospective and descriptive study conducted in the anatomical pathology laboratories of the university hospitals in Abidjan. The study was carried out over a period of twenty-four years (1984-2007). The variables studied were: frequency, age, histological type and prognosis. Results: Genital cancers in women accounted for 41.28% (n = 2491) of cancer in women and 21% of cancers. The average age of patients was 46.65 years (range 2 - 88 years). The cervix (82.85%) was the main location followed by the ovary (8.6%). Histologically, carcinomas (92.93%) were the most common types of sarcomas. Cervical cancers were diagnosed at an average age of 47.36 years (range 2 to 88 years). Carcinomas were the predominant histological type (92.88%) with 57.4% (n = 450) diagnosed at pT2N0m0 stage. The average age of patients bearing ovarian cancer was 39.13 years (range 8 to 82 years).Common malignant epithelial tumours were the most common histological type (57.48%) (n = 123) followed by non-Hodgkin lymphoma (14.95%). Conclusion: Genital cancers in women are common and poorly prognosed in Cote d’Ivoire. The adoption of a policy of routine screening is needed to improve the prognosis of these tumours.

关键词： Cancer Genital Women Epidemiology-Histology-C?te d’Ivoire

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Time Comparing between Java and C++ Software

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Journal of Software Engineering and Applications（软件工程与应用） 2012年第8期

作者： As’ad mahmoud Alnaser Omar AlHeyasat Ashraf Abdel-Karim Abu-Ein Hazem (moh'd Said) Hatamleh Ahmed A. m. Sharadqeh

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Integrative multi-omics and systems bioinformatics in translational neuroscience:A data mining perspective

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药物分析学报:英文版 2023年第8期13卷 836-850页

作者： Lance m.O'Connor Blake A.O'Connor Su Bin Lim Jialiu Zeng Chih Hung Lo College of Biological Sciences University of MinnesotaMinneapolisMN55455USA School of Pharmacy University of WisconsinMadisonWI53705USA department of Biochemistry and molecular Biology Ajou University School of MedicineSuwon16499South Korea Lee Kong Chian School of medicine Nanyang Technological UniversitySingapore308232Singapore

Bioinformatic analysis of large and complex omics datasets has become increasingly useful in modern day biology by providing a great depth of information,with its application to neuroscience termed *** mining of omics datasets has enabled the generation of new hypotheses based on differentially regulated biological molecules associated with disease mechanisms,which can be tested experimentally for improved diagnostic and therapeutic targeting of neurodegenerative ***,integrating multi-omics data using a systems bioinformatics approach will advance the understanding of the layered and interactive network of biological regulation that exchanges systemic knowledge to facilitate the development of a comprehensive human brain *** this review,we first summarize data mining studies utilizing datasets from the individual type of omics analysis,including epigenetics/epigenomics,transcriptomics,proteomics,metabolomics,lipidomics,and spatial omics,pertaining to Alzheimer's disease,Parkinson's disease,and multiple *** then discuss multi-omics integration approaches,including independent biological integration and unsupervised integration methods,for more intuitive and informative interpretation of the biological data obtained across different omics *** further assess studies that integrate multi-omics in data mining which provide convoluted biological insights and offer proof-of-concept proposition towards systems bioinformatics in the reconstruction of brain ***,we recommend a combination of high dimensional bioinformatics analysis with experimental validation to achieve translational neuroscience applications including biomarker discovery,therapeutic development,and elucidation of disease *** conclude by providing future perspectives and opportunities in applying integrative multi-omics and systems bioinformatics to achieve precision phenotyping of neurodegenerative diseases and towards personaliz

关键词： multi-omics integration Systems bioinformatics data mining Human brain profile reconstruction Translational neuroscience

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