检索结果-南通市图书馆

Q-switched pulse generation in a bidirectionally pumped EdFL utilizing Lu_(2)O_(3) as saturable absorber

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2021年第9期17卷 529-533页

作者： Nur F.Zulkipli Ahmad H.A.Rosol Sheriff A.Sadik Firat E.durak Ahmet Altuncu moh Yasin Sulaiman W.Harun department of Electrical Engineering University of MalayaKuala Lumpur 50603Malaysia Photonics Technologies Application and Research Center(FOTAM) Kütahya Dumlupinar UniversityKiltahya 43100Turkey department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia

In this paper,we have successfully demonstrated a Q-switched pulse generation utilizing lutetium oxide(Lu2O3)thin film based saturable absorber(SA)in all-fiber erbium-doped fiber laser(EdFL)cavity with a bidirectional *** Lu2O3 powder is mixed with isopropyl alcohol(IPA)solution before we add polyvinyl alcohol(PVA)as our host polymer to make the Lu2O3 into a thin *** inserting the Lu2O3-PVA thin film into a bidirectional pumped EdFL cavity,a stable Q-switched pulse is realized with repetition rate in a range of rose from 43.67 k Hz to 57.74 k Hz whereas the pulse width decreased from 14.48μs to 11.20μ*** result indicates that the Lu2O3 can be implemented as an SA device in an EdFL as it owns a linear absorption of around 3 d B at 1567 nm.

关键词： switched pumped pulse

Perceived Trust and Payment Methods: An Empirical Study of MarkaVIP Company

在线全文

学校读者我要写书评

暂无评论

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

The Impact of Social Media Networks Websites Usage on Students’ Academic Performance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications and Network 2015年第4期7卷 159-171页

作者： Mahmoud Maqableh Lama Rajab Walaa Quteshat Ra’ed moh’d Taisir Masa’deh Tahani Khatib Huda Karajeh Management Information Systems Faculty of Business The University of Jordan Amman Jordan Computer Information Systems King Abdullah II School for Information Technology University of Jordan Amman Jordan

Social Networks Sites (SNSs) are dominating all internet users’ generations, especially the students’ communities. Consequently, academic institutions are increasingly using SNSs which leads to emerge a crucial question regarding the impact of SNSs on students’ academic performance. This research investigates how and to what degree the use of SNSs affects the students’ academic performance. The current research’s data was conducted by using drop and collect surveys on a large population from the University of Jordan. 366 undergraduate students answered the survey from different faculties at the university. In order to study the impact of SNSs on student’s academic performance, the research hypotheses was tested by using descriptive analysis, T-test and ANOVA. Research results showed that there was a significant impact of SNS on the student’s academic performance. Also, there was a significant impact of SNS use per week on the student’s academic performance, whereas no differences found in the impact of use of SNSs on academic performance due to age, academic achievement, and use per day to most used sites. The findings of this research can be used to suggest future strategies in enhancing student’s awareness in efficient time management and better multitasking that can lead to improving study activities and academic achievements.

关键词： Social Network Sites Academic Performance University Students T-Test ANOVA

Cd4 cell activation with the Cd8 marker and metallothionein expression in the gills of cadmium-exposed mosquito fish(Gambusia affinis Baird and Girard 1853)juveniles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Emerging Contaminants 2022年第1期8卷 280-287页

作者： moh Awaludin Adam Agoes Soegianto Carolyn Melissa Payus Ach Khumaidi Ramli Ramli Ernawati Ernawati Irawati Mei Widiastuti Era Insivitawati Yenny Risjani Faculty of Science and Technology University of IbrahimySitubondoIndonesia Research Center for Marine and Land Bioindustry National Research and Innovation AgencyLombokNTBIndonesia department of Biology Faculty of Science and TechnologyUniversitas AirlanggaSurabayaIndonesia Faculty of Science and Natural Resources Universiti Malaysia SabahKota KinabaluSabahMalaysia Aquatic Product Technology department Faculty of AgricultureUniversity of YudhartaPasuruanEast JavaIndonesia Aquaculture department Faculty of Animal Husbandry and FisheriesUniversity of TadulakoPaluCentral SulawesiIndonesia Politeknik Kementerian Kelautan dan Perikanan SidoarjoJawa TimurIndonesia department of Aquatic Resources Management Faculty of Fisheries and Marine SciencesBrawijaya UniversityMalangIndonesia

This experiment aimed to determine how Cd exposure impacts Cd4 cell activation,macrophage cells,pinocytosis activity,metallothionine expression,and Cd levels in juvenile Gambusia affinis *** treatment groups were used,with one control and treatments A,B,C,and d at dosages of 0.03 mg/L,0.023 mg/L,0.015 mg/L,and 0.008 mg/L,*** results showed that the number of Cd4 with Cd8 cell markers differed significantly from each treatment compared to the control(0.33%).The value in A,namely 0.54%,was the highest,followed by B,C,and d of 0.46%,0.44%,and 0.42%,*** number of macrophages increased as the Cd level of the medium increased,as did the activity of ***,the immunofluorescence test on the gills with the Anti-MT Mouse and goat IgG fluoresce in Rhodamine on the gills showed that luminescence increased with increasing Cd levels in the ***,the MT intensity increased at Cd-exposed gills as compared to the *** the Cd level in the gills increased,the MT levels ascended significantly.

关键词： Cadmium Cd4 cell Fish health Immunity Metallothionein Water pollution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tl—Ga—S三元系的合成实验研究

岩石矿物学杂志 1993年第1期12卷 40-44页

作者：徐珏 Günter H.moh 中国地质科学院矿床地质研究所北京100037 德国海德堡大学

作者系统地进行了Tl—Ga—S三元系的合成实验研究。在300℃等温面上,发现了四个新相,Tl_4GaS_5为三元纯相,Ⅰ、Ⅱ、Ⅲ为固溶体相区,其成分变化范围分别是:(Ⅰ)Tl_(20)GaS_(16)—Tl_(20)Ga_2S_(17),(Ⅱ)Tl_(10)Ga_6S_(17)—Tl_5Ga_3S_7,(Ⅲ)Tl_2Ga_2S_5—TlGaS_2。此外,在630—900℃还存在一个成分为TlGa_5S_8—Tl_2Ga_(10)S_(11)的固溶体相。对这些新相均进行了X-射线粉晶衍射、光性及某些物性测试。X-射线粉晶衍射数据已进行了指标化。

关键词：铊镓硫三元素合成固溶体相

Review and Measuring the Efficiency of SQL Injection Method in Preventing E-Mail Hacking

在线全文

学校读者我要写书评

暂无评论

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

地下储气库注采循环过程中储层干化问题研究

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

Multiverse Fundamental Equation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy and Power Engineering 2019年第5期13卷 205-208页

作者： Khaled(moh’d Khalaf)Suleiman Alnobani Chemical Engineering Jordan University of Science and TechnologyIrbid 22110Jordan

A discussion of nature is *** is discussed with respect to certain other factors of nature.A potential energy equation is given which holds all relevant information about any system at equilibrium or non-equilibrium state with no restriction on number of phases.A differential form of the fundamental equation is also given,and it gives the amount of energy released if one or more of the variables are *** states of different distances in coupled verses are *** is no system of measurements outside the human mind,every verse calculates dynamically for *** design using sub-verses and gates is *** fundamental equation has important application for human self-development(martial arts).

关键词： Time mass multiverse

3d optical vortices generated by micro-optical elements and its novel applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics Letters 2007年第2期3卷 136-140页

作者： BU J. LIN J. K. J. moh B. P. S. Ahluwalia CHEN H. L. PENG X. NIU H. B. YUAN X.C. Institute of Optoelectronics Key Laboratory of Optoelectronic Devices and Systems of Chinese Education Ministry Shenzhen University Shenzhen 518060 China School of Electrical ＆ Electronic Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 Singapore

In this paper we report on recent development in the areas of optical vortices generated by micro-optical elements and applications of optical vortices, including optical manipulation, radial polarization and secure f... 详细信息

关键词：微光学器件三维光学涡流应用光线极化自由空间光通信