Factors affecting the perceptions of Iranian agricultural researchers towards nanotechnology     

Hosseini SM  Rezaei R 《Public understanding of science (Bristol, England)》2011,20(4):513-524

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Personal Review： Sources of sulfide in waste streams and current biotechnologies for its removal   总被引：6，自引：0，他引：6  

MAHMOOD Qaisar ZHENG Ping CAI Jing HAYAT Yousaf HASSAN Muhammad Jaffar WU Dong-lei HU Bao-lan 《浙江大学学报(A卷英文版)》2007,8(7):1126-1140

Sulfide-containing waste streams are generated by a number of industries. It is emitted into the environment as dis- solved sulfide (S2- and HS-) in wastewaters and as H2S in waste gases. Due to its corrosive nature, biological hydrogen sulfide removal processes are being investigated to overcome the chemical and disposal costs associated with existing chemically based removal processes. The nitrogen and sulfur metabolism interacts at various levels of the wastewater treatment process. Hence, the sulfur cycle offers possibilities to integrate nitrogen removal in the treatment process, which needs to be further optimized by appropriate design of the reactor configuration, optimization of performance parameters, retention of biomass and optimization of biomass growth. The present paper reviews the biotechnological advances to remove sulfides from various environments.  相似文献   

Understanding reforms,school reactions to major changes: the case of Israel     

Khalid Arar  Emanuel Tamir  Jamal Abu-Hussain 《Journal of educational administration and history》2019,51(4):402-418

ABSTRACT

Two major education system reforms were introduced by Israel’s government in collaboration with the teachers’ unions. These reforms redefine principals’ and teachers’ roles, increasing teachers’ work hours, and the scope of their work. School principals absent from the reform negotiations, are expected to apply the reform, although their work conditions were harmed. This research examines how principals cope with those reforms, and why they sometimes apply them in ways that seem to contradict their interests? Semi-structured interviews with 30 school principals, and 10 schoolteachers, indicated that the reforms have encumbered school principals’ complex tasks. They have little time or ability to thoroughly apply the reforms, responding to multiple stakeholders, political pressures, the exam regime, human resource management, etc. They often ignore policy directives, delegating authority to others, refrain from using certain resources provided by the reforms and allow internal forces to lead, while remaining uninvolved. Conclusions are presented.  相似文献   

Towards the successful integration of e-learning systems in higher education in Iraq: A student perspective     

Nisreen Ameen  Robert Willis  Media Noori Abdullah  Mahmood Shah 《British journal of educational technology : journal of the Council for Educational Technology》2019,50(3):1434-1446

This study aims to analyse the factors that can explain the adoption and effective use of a new e-learning system in Iraq. To achieve this, it uses a selection of factors that are present in the technology acceptance model (TAM) and the unified theory of acceptance and use of technology (UTAUT) model, and it includes three additional factors. The study hypothesises new relationships between the selected factors. Questionnaires were distributed to 300 university students in Iraq. Partial least squares-structural equation modelling (PLS-SEM) was used to analyse the data received. The findings suggest that perceived usefulness (PU), perceived ease of use (PEOU), subjective norms (SNs), information quality (IQ), system quality (SQ), technical support (TS) and self-efficacy (SE) have significant effects on behavioural intention (BI). In turn, BI and TS have significant direct effects on the actual use (AU) of e-learning systems. The factors age, gender and experience significantly moderated some of the relationships in the model. The research has several implications for policy makers, universities and the management of e-learning systems.  相似文献   

Optimization of fuzzy model using genetic algorithm for process control application     

Rubiyah Yusof  Ribhan Zafira Abdul Rahman  Marzuki Khalid  Mohd Faisal Ibrahim 《Journal of The Franklin Institute》2011,348(7):1717-1737

A technique for the modeling of nonlinear control processes using fuzzy modeling approach based on the Takagi-Sugeno fuzzy model with a combination of genetic algorithm and recursive least square is proposed. This paper discusses the identification of the parameters at the antecedent and consequent parts of the fuzzy model. For the antecedent fuzzy parameters, genetic algorithm is used to tune them while at the consequent part, recursive least squares approach is used to identify the system parameters. This approach is applied to a process control rig with three subsystems: a heating element, a heat exchanger and a compartment tank. Experimental results show that the proposed approach provides better modeling when compared with Takagi Sugeno fuzzy modeling technique and the linear modeling approach.  相似文献   

Key issues in education and social justice     

Khalid Arar 《Educational studies》2013,39(5):600-601

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Study of cellulolytic soil fungi and two nova species and new medium     

Khalid M  Yang WJ  Kishwar N  Rajput ZI  Arijo AG 《Journal of Zhejiang University. Science. B》2006,7(6):459-466

This study is aimed at identifying and determining the percentage of occurrence frequency of cellulose decomposing soil fungi. The soil samples were inoculated into culture plates prepared in Sabouraud medium under sterilized conditions and incubated at 30 ℃ for 4 to 7 d. The identified fungal species were incubated in self-designed cellulose medium for testing their cellulolytic ability. Forty-two species, including2 nova species, representing sixteen genera showed growth and sporulation in the cellulose medium. Most of the isolated species were from genus Aspergillus and Penicillium. Aspergillus niger and Mucor hiemalis showed highest occurrence frequency （45% and 36% respectively）, as these species were collected from about 80% of soil samples. Being agar free and cheaper, the new fungal medium designed showed results equivalent to Sabouraud medium.  相似文献   

The imposition of government education policy initiatives and school enactment: uncovering the responses of school principals     

Khalid Arar  Yasar Kondakci  Alison Taysum 《Journal of educational administration and history》2019,51(4):295-300

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Anatomical studies on water hyacinth (Eichhornia crassipes (Mart.) Solms) under the influence of textile wastewater     

Mahmood Q  Siddiqi MR  Islam Eu  Azim MR  Zheng P  Hayat Y 《Journal of Zhejiang University. Science. B》2005,6(10):991-998

Water hyacinth (Eichhornia crassipes (Mart.) Solms) is a prolific free floating aquatic macrohpyte found in tropical and subtropical parts of the earth. The effects of pollutants from textile wastewater on the anatomy of the plant were studied. Water hyacinth exhibits hydrophytic adaptations which include reduced epidermis cells lacking cuticle in most cases, presence of large air spaces (7∼50 μm), reduced vascular tissue and absorbing structures. Textile waste significantly affected the size of root cells. The presence of raphide crystals was noted in parenchyma cells of various organs in treated plants. Project (No. 30070017) supported by the National Natural Science Foundation of China  相似文献   

Comparative study of Anaplasma parasites in tick carrying buffaloes and cattle     

Rajput ZI  Hu SH  Arijo AG  Habib M  Khalid M 《Journal of Zhejiang University. Science. B》2005,6(11):1057-1062

INTRODUCTION The world population of buffaloes(Bubalus bubalis)has been estimated at over172million head,more than97%(167.6million)of which are in Asia and the Pacific region,mainly in India(97.7million)and Pakistan(25.5million)(FAO,2004).About98%of buffaloes in the region are raised by small farmers owning less than two hectares of land and less than five buffaloes(Mudgal,1992).In general,the water buffalo is regarded as more productive,healthier and more useful than the cow,especiall…  相似文献