Archives-December  

A novel method for analytical detection of H2O2 based on ruthenium nanoparticles (RuNPs) functionalized chemically reduced graphene (CRGR) nanocomposite is developed. The RuNPs/CRGR nanocomposite was characterized employing different techniques, such as transmitted electron microscope (TEM), cyclic voltammetry (CV) and chronoamperometry (CA). The RuNPs/CRGR nanocomposite sensor exhibits higher catalytic effect to H2O2 by greatly enhancing the reduction peak current and completely eliminating the interference of other species as compared with a bare electrode. A fast amperometric response was observed by the RuNPs/CRGR electrode with a linear range from 10 to 170 µM and lower detection limit of 0.16±0.01 µM as compared to some other reports. The high reproducibility, specificity as well as long time stability obtained with the proposed sensor indicated that the present method is an effective for H2O2 determination.

The world of education is always changing, in line with the times and the demands of the country's needs . Therefore, the education system needs someone thought leaders in achieving the dream and vision. In educational institutions, the role of the principal is very important in any leadership style can influence and improve the level of change and reform in schools. Effective leaders are leaders who have specific characteristics such as intelligence, honesty and integrity, leadership motivation, self-confidence and creativity. A principal who play an active role as a leader should use the latest approaches to advance the institution he led. One approach that can be used is the charismatic leadership or charismatic leader. Library-based research paper, data was collected using textbooks, journal articles and internet search. In addition, the information valid and reliable used to fulfill the purpose of this paper. This paper was written to study the transformation of the School Management Approach against Charismatic Leadership Styles. It will also touch on the findings obtained from several researchers on topics related to this paper. Charismatic leadership approaches should be emphasized in school management

This paper discusses Second Life, an interactive platform where college students can take advantage of learning opportunities. My interest in distance education presents Second Life as a very useful platform that could promote education at the university level. Through a very modern internet interactive platform, it has the potential of becoming a very useful avenue where virtually all subjects can be addressed. As an educator, I have found the use of Second Life more positive than negative. Second Life helps the students to explore the world around them using the virtual world, by combining the use of games and other interactive instruments. Virtual worlds are not limited to games, but, depending on the degree of immediacy presented, can encompass computer conferencing and text-based chat rooms. Literature shows that there is an ever-increasing growth of people accessing Second Life for educational advantages.

This paper evaluates the benefits of operating an electric distribution network in a security-constrained optimal power flow (SCOPF) in order to mitigate against possible blackout in an N-1 contingency. A 16-bus UKGDS network was used for the analysis. An SCOPF was performed on the network by introducing N-1 line contingency to the network and this resulted to constraints violations. The infeasibility in the solution occurred due to the radial nature of the network. The operation of SCOPF is realized in a mesh network system, which was done by connecting branches between bus 5-7 and bus 12-16 to the network. The system was simulated to operate in SCOPF and N-1 line contingency was inserted to the network to test for constraint violation/ feasibility of the system. This resulted in feasible solution in all the line contingencies with no constraint violation.

Citrullus lanatus, Cucumeropsis edulis and Lagenaria siceraria are three species of squash widely cultivated and used in food in Benin. The aim of this study is to determinate the physicochemical characteristic and antimicrobial activities of their seeds oil. Oils were obtained by Soxhlet extraction; their quality index were evaluated according to the methods listed in the ‘’AFNOR’’. The oil yield of the seeds of the three cucurbits ranged from 36.23 to 42.28%, the moisture contents of the seeds oils ranged from 0.47 and 0.98%. In terms of quality index, the values are between: 5.04-14.58 mg/g for acid value, 31.70 - 31.86 % for iodine, 1.65 - 8.42 meqO2/Kg-oil for peroxide value, 50.49 - 75.73 mg KOH/g-oil saponification and for ester 40.39 - 70.68%. Their calculated calorific value varies between 44611.05 and 45717.65 Kj /Kg-oil). AAS revealed that these oils had low content of Iron, Manganese and Potassium and do not contain Sodium at all. HPLC showed that the three oils are good sources of fat-soluble vitamins (A, E and K1) with 6.18 mg/100g vitamin E in Citrullus lanatus seeds oil and K1 (0.83 mg / 100g). They were all bacteriostatic and fungistatic on the strains explored but Citrullus lanatus and Cucumeropsis edulis oils had an antibiotic power on Escherichia coli and Staphylococcus aureus.

The protection of environment and natural resources has high importance in achieving sustainable development. Desertification is one of the major issues threatening human communities. This phenomenon threatens about 40% of the global land surface and has influenced the life of 785 million people. In recent years, desertification control and reduction have been the most important projects in national and international organizations. Many methods have been developed for assessment and mapping of desertification hazards. Decision making problem is the process of finding the best option from all of the feasible alternatives. In almost all such problems the multiplicity of criteria for judging the alternatives is pervasive. That is, for many such problems, the decision maker wants to solve a multiple criteria decision making (MCDM) problem. Purpose of this study is ranking of plant species in order to stabilize sand dunes in dealing with the spread of desertification.according this research Haloxlylon Species with (0/943) point promotes in first rank among 7 studied Species and thus it is the most appropriate Species for stabilize sand dunes in dealing with the spread of desertification and Alhagi maurorum with (0/020) point goes down to the last rank and so it isn`t suitable for stabilize sand dunes and Species (Salsola Kali, Peganum harmala, Seidlitzia rosmarinus, Astragalus, Tamarix hispida) with (0/629, 0/559, 0/485, 0/394, 0/329) points are located in next ranks.

Recently, some social problem such as teen pregnancy, baby dumping, sexual transmitted disease had been increased in number, particularly in Muslim country such as Indonesia. Some people suggest that sex education might be one of the solutions to overcome the problem. Thus, this study focused on exploring the young Muslim Indonesian’s perception on the implementation of Sexual education at school. Five young Indonesian IIUM students from various school backgrounds were interviewed together. In general, the findings reflected the openness and awareness of Indonesian Muslim student toward having sexual education in class room. The respondents perceived that sexual education at school is needed by young people. There are different opinions on which school level the education should be introduced first. At the end, they proposed an integrative approach to be covered in the module

Cryptography circuits for portable electronic devices provide user authentication and secure data communication. These circuits should, in general, occupy small chip area, consume low power, handle several cryptography algorithms, and provide acceptable performance. This paper presents the simulation and synthesis of three standard cryptography algorithms on a universal architecture. The cryptography processor implements both private key and public key algorithms and meets the power and performance specifications. The mentor graphics modelsim tool is used for design and simulation and also Synopsys Design Compiler tool is used for synthesis. TSMC 65nm library is used for the synthesis.

One of the striking aspects of community development community stability is Feeling of security. Public safety requires the establishment of a society in which there exist the minimal structural elements such as social justice, provision of social justice, employment, freedom and sovereignty of people and their full participation, distribution of knowledge and information in society, social disorder, use of resources, scholars and social adjustment. The present study, by using field study and survey techniques, is to answer this question; what are the most important factors affecting the Feeling of security in cities? In the study population, 400 individuals of all the citizens of Bandar Abbas city who are more than 20 years old have been studied. The findings suggest that the Feeling of security among the residents of Bandar Abbas is fairly. There is a significant correlation between the Feeling of security with the variables of the city space, various internal and external mass media, economic-social bases and gender.

Cassia fistula Linn. Belongs to family Leguminosae, Sub – family Caesalpineae, a very common Indian plant is known for its medicinal properties. C. fistula is known to be an important source of secondary metabolites notably phenolic compounds like tannins, flavonoids and glycosides. Pharmacological activities include antibacterial, antidiabetic, antifertility, anti-inflammatory antioxidant, hypatoprotective, antitumor, antifungal activities. This article provides glimpses on morphology, traditional uses and its phytochemical and pharmacological activities.