International Journal of Sciences: Basic and Applied Research (IJSBAR)

Design of a Bandpass Filter with an Absorptive Stopband for Multifeed Antenna Systems

Joe Zeidan — 2024-06-23

This paper presents a filtering solution for enhanced multiband and multisource antenna systems used for space applications. Covering a large surface of the Earth necessitates numerous apertures closely spaced over a reflector antenna. Since these multi-feed systems generally employ multiple bands and multiple polarizations, these architectures induce significant coupling and consequently influence the effectiveness of the solution. The approach of signal retransmission with a controlled phase is proven to be efficient despite a delay concern. On the other hand, as shown in this paper, dissipating the reflected signal can also provide an adequate solution. For this second approach, we have synthesized a two-band filter, one passing the signal, the other absorbing it. This behaviour fits the desired antenna performance and improves the isolation between the two channels. We have designed such a filter and a comparison was made between the two approaches to investigate and derive the efficiency and benefit of each solution. A resized version of the microwave filter with dual behaviour has been manufactured and characterized for experimental verification.

Enhancing Arab College Students' Cross-Cultural Communication Competence

Philip Harttrup — 2024-07-01

This paper examines the importance and challenges of cross-cultural communication among Arab college students. It also presents recommendations on how to improve these skills with the aim of equipping Arab tertiary students with the means to thrive in business, diplomacy, and in diverse cultural environments in an increasingly globalized world.

The Analysis of Risk Causes of Building Failure Using Confirmatory Factor Analysis (CFA) Method of Building Condition Index Figures In Educational Buildings

AI Harumain — 2024-07-01

This research aims to analyze the building condition index numbers. These risk factors cause building failure using the Confirmatory Factor Analysis (CFA) method, dominant factors of risk that cause building failure, and the strategies used to minimize the risk of building failure in state asset buildings in Jember Regency. The object of research was state buildings in 3 city sub-districts in Jember Regency. This research used risk variables and building condition assessments. Data analysis used Confirmatory Factor Analysis (CFA). The research results showed that the assessment of the building's condition contained serious deterioration or damage, but the function of the building was still sufficient. The results of Confirmatory Factor Analysis include force advancement, material and labor risks, management risks and maintenance risks.

Farmer’s Participation to Increase the Dynamics of Lowland Rice Farmer Group in Maluku Province, Indonesia

Meilvis E. Tahitu — 2024-06-23

This research aims to analyze farmer participation in improving the dynamics of farmer groups, especially lowland rice farmer groups in Maluku. This is considered important because there are still many farmer groups in Maluku that are not dynamic or tend to stagnate, for that it difficult to develop farmers. Waimital Village was chosen because it is the main center for lowland rice production in Maluku and all farmers are members of farmer groups. The research respondents were determined to be five people representing each group consisting of the group leader and four members. Thus, the number of respondents was 95 farmers as member group representing 19 existing farmer groups. Primary and secondary data were collected to form the basis of qualitative descriptive analysis. The research results showed that the dynamics of farmer groups in Waimital Village were in the good category dominantly. Based on the elements of group dynamics, it can be seen that the elements of group goals were in the very good category; elements of group structure, task function, group development and maintenance, group cohesiveness and group atmosphere were in the good category; and the elements of group pressure and group effectiveness were still in the medium category. Farmers assess that farmer groups have functioned good, it was proven that 81.7% of farmers feel that farmer group has functioned well as a vehicle for learning and 90.2% feel that farmer group was a good vehicle for cooperation.Farmer participation was in the medium to high category, which means it can still be increase. To increase the participation of group members, support for facilities and infrastructures is needed from all relevant agencies and assistance for farmer groups in implementing group plans. Increasing the participation of group members will increase the dynamics of farmer groups which will then increase the productivity of farmer groups.

Ensuring Accountability and Transparency: The Need for Proper Regulation of Police Drone Use in Democratic Societies

Łukasz Dziura — 2024-06-23

In a democratic society governed by the rule of law, the use of new technologies by the police must be properly regulated. When police technology is used incorrectly and without legitimate reason, it can become hostile in the eyes of the public. Lack of proper safeguards and regulations can also lead to lack of accountability for actions in the line of duty. This article focuses on two main aspects. Firstly, it describes issues posed by rapid implementation of new technologies by the police and emphasizes the need for proper oversight of police drone activities. Secondly, it presents findings from socio-legal research conducted between 2019 and 2023. This study combines doctrinal legal research with empirical studies conducted in Poland, Germany, Spain, and the United Kingdom. It includes in-depth interviews with police officers, national aviation safety agency officers, and foreign experts, supplemented by field observations of police drone use in practice. The article concludes with critical remarks on current legislation, highlighting significant inadequacies, particularly in Polish regulations, and calls for a new approach to police accountability and transparency.