检索结果-南通市图书馆

Impact of Intensive Greenhouse Production System on Soil Quality

Pedosphere 2015年第2期25卷 282-293页

作者： tarek G.AMMARI Ragheb TAHHAN Nizar AL SULEBI Alaedeen TAHBOUB Rakad A.TA'ANY Samih ABUBAKER Departemnet of Water Resources and Environmental Management Faculty of Agricultural TechnologyAl-Balqa' Applied University Departement of Natural Resources and Environment Faculty of AgricultureJordan University of Science and Technology Department of Plant Production and Protection Faculty of Agricultural TechnologyAl-Balqa' Applied University

Composite top- and subsoil samples were collected from the greenhouses in the Al-Balawneh area,Jordan,where intensive greenhouse production system(IGPS) has been practiced since 1998,to study the impact of IGPS on soil quality as measured by the chemical and biological properties to develop a sustainable production *** study showed that IGPS led to higher electrical conductivity in top- and subsoils compared to an uncultivated soil(control).Quality and amount of irrigation water,lack of efficient drainage,and quantity and types of applied fertilizers were major factors resulting in salt *** resulted in lower total N(TN) and NO_3-N in the soil compared to the *** lower TN was due to crop uptake,microbial immobilization,volatilization,and irregular application of composted animal manure or poultry *** contrast,higher residual Olsen-P content was detected in both soil layers of greenhouses than in the *** P was classified as very high in the topsoil layers and sufficient to high in the subsoil *** available K in the soils of greenhouses was relatively lower than that in the control and it was,however,classified as high to very high.A large increase of Cl and a considerable decrease in the bacterial count were observed in both soil layers of IGPS compared to the control *** sustainable soil management practices need to be adopted by farmers to achieve a sustainable and profitable *** can be accomplished through education,targeted towards the farming community in the central Jordan Valley.

关键词： central Jordan Valley salt buildup soil health soil management unsustainable agriculture practices

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Roughly B-invex Multi-Objective Programming Problems

引用

Open Journal of Optimization 2012年第1期1卷 1-7页

作者： tarek Emam Department of Mathematics Faculty of Science Suez Canal University Suez Egypt

In this paper, we shall be interested in characterization of efficient solutions for special classes of problems. These classes consider roughly B-invexity of involved functions. Sufficient and necessary conditions fo... 详细信息

关键词： Multi-Objective Programming Problems Roughly B -invex Efficient Solutions Properly Efficient Solutions

来源：评论

学校读者我要写书评

暂无评论

用等离子旋转电极工艺生产高氮钢

引用

钢铁研究学报 2004年第1期16卷 15-20页

作者：陶宇 tarek El Gammal 钢铁研究总院高温材料研究所北京100081 亚琛工业大学钢铁冶金研究所德国亚琛52072

为了寻求高效、经济的高氮钢生产工艺,用等离子旋转电极工艺(PREP)生产高氮钢并测试了所生产的几种典型高氮钢的性能。结果表明,氮可显著地提高奥氏体不锈钢1 4301的室温及高温强度;氮可以提高马氏体不锈钢的强度。为保证高氮马氏体不... 详细信息

为了寻求高效、经济的高氮钢生产工艺,用等离子旋转电极工艺(PREP)生产高氮钢并测试了所生产的几种典型高氮钢的性能。结果表明,氮可显著地提高奥氏体不锈钢1 4301的室温及高温强度;氮可以提高马氏体不锈钢的强度。为保证高氮马氏体不锈钢的淬透性,应根据氮含量适当降低其碳含量或提高铬含量。对于铬含量为17%的马氏体不锈钢1 4122,其碳和氮的总含量不应超过0 65%;当氮含量达到0 24%时,铁素体不锈钢1 4016转变成为马氏体钢,其强度高于碳和氮的总含量与其相当的普通马氏体不锈钢1 4122。

关键词：等离子旋转电极工艺高氮钢粉末冶金生产工艺

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Roughly <i>B</i>-invex Multi-Objective Programming Problems

引用

Open Journal of Optimization 2012年第1期1卷 1-7页

作者： tarek Emam Department of Mathematics Faculty of Science Suez Canal University Suez Egypt

关键词： Multi-Objective Programming Problems Roughly B-invex Efficient Solutions Properly Efficient Solutions

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Innovative Hetero-Associative Memory Encoder(HAMTE)for Palmprint Template Protection

引用

Computer Systems Science & Engineering 2023年第7期46卷 619-636页

作者： Eslam Hamouda Mohamed Ezz Ayman Mohamed Mostafa Murtada K.Elbashir Meshrif Alruily Mayada tarek College of Computer and Information Sciences Jouf UniversitySakaka72314Saudi Arabia College of Computers and Informatics Mansoura University35516Egypt

Many types of research focus on utilizing Palmprint recognition in user identification and *** Palmprint is one of biometric authentication(something you are)invariable during a person’s life and needs careful protection during enrollment into different biometric authentication *** and irreversibility are critical requirements for securing the Palmprint template during enrollment and *** paper proposes an innovative HAMTE neural network model that contains Hetero-Associative Memory for Palmprint template translation and projection using matrix multiplication and dot product multiplication.A HAMTE-Siamese network is constructed,which accepts two Palmprint templates and predicts whether these two templates belong to the same user or different *** HAMTE is generated for each user during the enrollment phase,which is responsible for generating a secure template for the enrolled *** proposed network secures the person’s Palmprint template by translating it into an irreversible template(different features space).It can be stored safely in a trusted/untrusted third-party authentication system that protects the original person’s template from being *** results are conducted on the CASIA database,where the proposed network achieved accuracy close to the original accuracy for the unprotected Palmprint *** recognition accuracy deviated by around 3%,and the equal error rate(EER)by approximately 0.02 compared to the original data,with appropriate performance(approximately 13 ms)while preserving the irreversibility property of the secure ***,the brute-force attack has been analyzed under the new Palmprint protection scheme.

关键词： Palmprint recognition hetero-associative memory neural network and Siamese network

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Prevalence of intestinal parasitic infections and its relationship with socio-demographics and hygienic habits among male primary schoolchildren in Al-Ahsa,Saudi Arabia

引用

Asian Pacific Journal of Tropical Medicine 2010年第11期3卷 906-912页

作者： Hamdan Ibrahim Al-Mohammed tarek Tawfik Amin Elsayed Aboulmagd Hatem Refaat Hablus Burhan Omar Zaza Department of Medical Microbiology and Parasitology College of MedicineKing Faisal UniversitySaudi Arabia Department of Community Medicine Faculty of MedicineCairo UniversityEgypt Department of Paediatrics College of MedicineKing Faisal UniversitySaudi Arabia Technical Director School Health Preventive ServicesMinistry of EducationAl-Hofuf DirectorateSaudi Arabia

Objective:To investigate the prevalence of different intestinal parasitic infections among male primary schoolchildren in Al-Ahsa,Saudi Arabia,and to explore the possible relative socioeconomic, environmental and behavioural sanitary ***:A cross-sectional descriptive study was performed.A total of 1 289 male students aged from 7 to 12 years were selected randomly from 20 urban and 12 rural primary schools by multistage sampling method. Data collection was carried out by self administered questionnaire form to the parents/guardians of students and included inquires about socio-demographics,environmental conditions,and behavioural sanitary *** analysis was carried out to examine the presence of intestinal parasitic ***:Overall prevalence of parasitic infections was 27.2%,more among rural *** encountered infections included Entamoeba histolytica/dispar(8.2%), Giardia lamblia(6.5%),Entamoeba coli(4.0%) and Enterobius vermicularis(1.6%).Logistic regression revealed that lower maternal educational level and occupational status,low family income,big family size,poor personal hygienic practices and positive history of previous intestinal infections among family members increased the likelihood of ***: Although of low magnitude,intestinal parasitic infections still represent a public health concern among male schoolchildren in Al-Ahsa ***-demographic and poor personal hygienic habits are the main predictors for these infections.

关键词： Intestinal parasitic infections Schoolchildren Epidemiological correlates Hygiene Saudi Arabia

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sustainable Development Importance in Higher Education for Occupational Health and Safety Using Egypt Vision 2030 under COVID-19 Pandemic

引用

Journal of Geoscience and Environment Protection 2021年第4期9卷 74-112页

作者： tarek Adel Mouneer Mechanical Engineering Department Benha Faculty of Engineering Benha University Benha Egypt

Insertion of Sustainable Development Goals (SDGs) into higher education is an important concern. This article aims to address the influences of SDGs in higher and engineering educational system in Egypt. The present study focuses on SDGs 3, 4, 6, 7, 9, and 11. SDG 3 is related to occupational health and SDG 4 is related to higher education development. However, SDGs 6, 7, 9, and 11 are related to both mechanical and environmental engineering, and occupational safety. The study approach involves case risk analysis, investigations, and review for design concepts of occupational health and safety before and after the Coronavirus disease (COVID-19). A number of cross-sectional studies that constitute 125 multidisciplinary research plans (MDRPs) are grouped to monitor and evaluate two main factors which are an influence of involving SDGs into engineering education and selected curriculum of occupational health and safety. Then the results of these research-based studies, which performed over four academic years started from 2017 up to date 2021, are depicted and discussed. These results reveal the importance of interlink between engineering education and the intended SDGs. The latest 25 MDRPs demonstrate that Egypt response to alleviate the COVID-19 is rapidly pronounced specially on SDGs 3 and 4 simultaneously. However, those MDRPs show that neither record impacts nor delays on SDGs 6, 7, 9 and 11. The conclusions prioritize both the advanced educational mechanisms and verify the engineering curriculums to raise awareness of SDGs among both staff members and students in Egyptian universities. Finally, future work is recommended at the end of this article to focus on each specific goal to gain deep insight to state of the art for each SDG around globe using education development.

关键词： Sustainable Development Education Development Occupational Safety Occupational Health Egypt Vision 2030 COVID-19 Pandemic

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Melatonin and/or rowatinex attenuate streptozotocin-induced diabetic renal injury in rats

引用

The Journal of Biomedical Research 2019年第2期33卷 113-121页

作者： tarek K Motawi Samia A Ahmed Manal A Hamed Shohda A El-Maraghy Wessam M Aziz Biochemistry Department Faculty of Pharmacy Cairo University Therapeutic Chemistry Department National Research Centre

The study aimed to explore the prophylactic effect of melatonin, rowatinex; a naturally occurring renal drug, and its combination on diabetic nephropathy in type 2 diabetic rats. Diabetes was induced by intraperitoneal injection of a single dose of streptozotocin(50 mg/g body weight). Three days before diabetes induction, rats were daily treated with melatonin, rowatinex and their combination continuously for 8 weeks. Evaluation was done through measuring blood urea nitrogen(BUN), serum uric acid, serum creatinine, urine creatinine, creatinine clearance, nitric oxide(NO), malondialdehyde(MDA), superoxide dismutase(SOD), glutathione(GSH), total antioxidant capacity(TAC),kidney injury molecule-1(KIM-1), heat shock protein-70(HSP-70), caspase-3, transforming growth factor β1(TGFβ1), DNA degradation by the comet assay and total protein contents. Histopathologic study was also done for the kidney and the pancreas. Drastic changes in all measured parameters of the diabetic rats were observed. Treatment with melatonin and rowatinex showed amelioration to variable degrees. In conclusion, melatonin showed the most potent effect on protecting rats from deleterious action of diabetic nephropathy followed by its combination with rowatinex.

关键词： diabetic nephropathy melatonin rowatinex histopathology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

采访埃及ICT部部长tarek kamel阁下

引用

网络电信 2008年第5期10卷 22-23页

作者： tarek Kamel

在开罗举办的2004年ITU非洲电信展上，当时的埃及ICT部部长，纳齐夫·艾哈迈德，在埃及推行了一系列强有力的正在进行的信息和通信技术（ICT）相关措施。

关键词： ICT 埃及部长采访通信技术 ITU

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Role of Silver Additions in Formation of Sn-Bi-Ag Semiconductor Alloys by Rapid Solidification

引用

Materials Sciences and Applications 2015年第3期6卷 228-233页

作者： tarek El Ashram Physics Department Faculty of Science Port Said University Port Said Egypt Physics Department Preparatory Year Deanship Jazan University Jazan Kingdom of Saudi Arabia

Five alloys Sn-5Bi-xAg (x = 0, 1, 2, 3, and 4 in at %) are produced by rapid solidification using melt-spinning technique. From temperature dependence of electrical resistivity (TDR), it is found that the Sn-5Bi-xAg (x = 1, 2, 3, 4 in at %) rapidly solidified by melt spinning technique are narrow band semiconductor alloys. The energy gap Eg decreases by increasing Ag concentration from 203 meV for Sn-5Bi-1Ag to 97.5 meV for Sn-5Bi-4Ag alloy. From x-ray diffraction analysis (XRD), it is found that the Hume-Rothery condition for phase stability is not satisfied for this alloy.

关键词： Rapid Solidification Semiconductor Energy gap Resistivity Sn-Bi-Ag Alloys

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：