A cellular base station antenna configuration for variable coverage

The field coverage offered by the base station antenna in GSM systems influences the reception and interference performances. The coverage can be varied by scanning the mainbeam direction or varying the shape of the radiation pattern. In cellular system applications, a simple technique is desirable to achieve this goal. A simple technique to vary the coverage of cellular base station is investigated. The technique uses two conventional antennas tilted by a certain angle and fed by the same signal but at variable amplitudes. It is demonstrated that the field across one half of the covered sector can be gradually increased while that at the other half is reduced by varying the excitations of the two antenna elements. This can be deployed in a simple electronic means in response to the changing scenario rather readjusting the direction of the base station antenna

A FRAMEWORK FOR STUDENT ENGAGEMENT IN SOCIAL NETWORKING SITES

Social networking sites (SNSs), such as Facebook and Twitter, are gaining more popularity and use among students in higher education institutions. Based on the design principles, feature usability and interactivity and affordability, these sites offer a variety of opportunities to support student engagement and student learning. Despite the potential pedagogical advantages of SNSs, and the widespread usage among students and considerable time spent daily on SNSs, the results of many studies indicate that the use of SNSs for academic purposes is still significantly limited. In the present study, individual interviews and focus group discussions were conducted based on a purposeful sampling strategy in order to explore in depth the factors that might motivate students to devote more time and efforts for academic purposes on SNSs; accordingly, a Framework for Student Engagement in SNSs (FSESNS) is proposed

The Influence of the Implementation of the Program of Corporate Social Responsibility (CSR) Against the Image of the Company PT. Arara Abadi on Society Perawang Kec. Tualang Kab. Siak

Many companies are increasingly aware of and assessing the implementation or application of CSR programs not merely fulfill the obligations as set out in the Act. The better a company'S CSR program implementation the more positive and also good corporate image in the eyes of the public . The application of CSR program PT. Arara Abadi held already although there is still that have not been fully implemented as expected community so that the positive image that was expected by the company has not achieved fully.This research was conducted at the Subdistrict Perawang Tualang Siak Regency. As for the reason for choosing a PT. Arara Abadi that to measure the degree of implementation of CSR and decline the positive image of the company. The purpose of this research was conducted to find out the influence of the implementation of the program of corporate social responsibility (CSR) against the company's image.In this research is methodologies used by is quantitative and descriptive with program SPSS, where sample used by that is community around company society perawang and as source of information is party of UP-CD CSR PT.Arara Abadi. To determine sampel use formula Slovin, method of sampling by accidental sampling. Technics of data collecting of through, observation and quesioner.From the results of the data analysis that includes a test of validity, reabilitas, and a simple linear regression, the implementation of CSR programs against the corporate image. Each has interconnected indicators and positive effect toward corporate image on PT. Arara Abadi Perawang

A Study on Causes of Condemnation of Carcass and Organs at Shah Alam Abattoir

A two-week study of the causes of condemnation at Shah Alam abattoir was conducted. In the bovine species, liver and lungs w.ere the main organs condemned due to fluke infestation. and emphysema respectively. Ninety-five percent of pig lungs were condemned because of back bleeding, while in sheep caseous lymphadenitis was the major cause of organ condemnedtion affectingg mainly the lungs and lymph nodes. No total carcass condemnation was observed in any species during the study perio

Improved Protection from Velogenic Newcastle Disease Virus Challenge Following Multiple Immunizations With Plasmid DNA Encoding for F And HN Genes

Specific-pathogen free (SPF) chicken were inoculated with the plasmid combination and challenged with velogenic NDV. The antibody level against NVD was measured using commercial enzyme linked immunosorbent assay (ELISA). In the first immunization regimen, SPF chickens inoculated twice with NDV-F or NDV-HN constructs elicited antibody responses 1 week after the second injection. However, the levels of the antibody were low and did not confer significant protection from the lethal challenge. In addition, admininistration of the plasmid constructs with Freund’s adjuvant did not improve the level of protection. In the second immunization regimen, chickens inoculsted trice with the plasmid constructs emulsified with Freund”s adjuvant induced significant antibody titers after the third injection. Three out of nine (33.3 %) chickensvaccinated with pEGFP-HN, five of ten (50.0%) chicken vaccinated with pEGFP-F and nine of ten (90.0%) chicken vaccinated with combined pEGFP-F and pEGFP-HN were protected from the challenge. No significant differences in the levels of protection were observed when the chicken were vaccinated with linearized pEGFP-F. the results suggested that more than two injections with both F and HN encoding plasmid DNA were required to induce level of antibodies for protection against velogenic NDV in chickens

Peningkatan Motivasi Belajar Siswa Menggunakan Metode Inkuiri dalam Pembelajaran IPA di Sekolah Dasar

This study aims to describe the use of methods of inquiry in the study of Natural Science in Class IV Elementary School 14 Mempawah Timur. The method used is descriptive method to form action research. Fourth grade students study subjects Elementary School 14 Mempawah Timur with as many details as 9 girls and 9 boys. The technique used in this study is the direct observation techniques and data collection tool that is used to obtain information on this study is the observation sheet. The results showed increased to 3,67 lesson planning, teaching ability of teachers to implement increased to 3,96 and student motivation increased by 83,94

Prediksi Erosi pada Beberapa Penggunaan Lahan di Desa Labuan Toposo Kecamatan Labuan Kabupaten Donggala

Erosion is one of the factors that causing the decline in soil capacity to support good agriculture production. This often happened in some land use when the land is managed without pay attention to soil conservation and or the soil capacity to support production. Soil erosion prediction can be good information for local government and soil erosion index of several land use types including non-agriculture can be used to manage sustainability of development. The purpose of this study was to predict the soil erosion rate and determine soil erosion erosion index on several land use types at the Labuan Toposo village Donggala District. The soil was analyzed at soil science laboratory of Tadulako University. The study was conducted from October to January 2016. This study was used the method direct survey in the field and continued with the soil sampling for laboratory analysis. Then the analysis result was further processed by using the equation USLE (Universal Soil Loss Equation ). This study showed that the erosion index that occurredat the village of Labuan Toposo was diverse while the erosion hazard index was lowest for forest land, and the highest was found for teak and coconut. This was caused by land use patterns, land management measures, in addition the high erosion hazard index indicate the potential to cause erosion. It is therefore vital to do conservation measures to prevent erosion e.g. by inter cropping and the use of crop residue on land surface such as mulching