New Dawn in the East: The Vice-Province of SS. Cyril and Methodius

viii. 72p; 21 cm

ICT usage amongst lecturers and its impact towards learning process quality

The use of ICT in education has caused substantial changes in learning and brought many benefits to higher learning institutions. However, the development of ICT in the institution of higher education in Indonesia is a minus value compared to other Southeast Asia countries (e.g., Singapore and Malaysia). This is due to several factors which are the lack of knowledge and lack of motivation, especially in Medan, North Sumatera. Medan as the fourth largest city in Indonesia has a low penetration of ICT utilization compared to the other cities which is smaller than it is. Previous studies have found that there is a positive relationship between variables, which are motivation towards ICT usage, knowledge level towards ICT usage, and ICT usage towards learning process quality. This paper addresses the issue by demonstrating a method of study to identify the impact of ICT usage towards learning process quality by lecturers in Medan, Indonesia. As a result, the application of the quantitative research design and data collection through survey questionnaire was considered as the most appropriate method to receive the outcome of the study. Statistical techniques which are the descriptive statistical analysis and regression analysis methods proposed as the means to analyze the data

Thermodynamic and Environmental Analysis of a High-temperature Heat Pump using HCFO-1224yd(Z) and HCFO-1233zd(E)

This paper investigates the use of two low global warming potential working fluids, HCFO-1224yd(Z) and HCFO-1233zd(E), in high-temperature heat pump systems. A simulation was performed at evaporating temperatures ranging from 50–70°C and a condensing temperature of 110°C. A solar thermal collector was used to supply the energy needs on the evaporator side. Energy, exergy, and environmental analyses were performed to evaluate both environmentally friendly refrigerants and compare them to HFC-245fa. The coefficient of performance (COP) and total exergy destruction represented the performance of the system, while the total equivalent warming impact was used to evaluate the environmental effect of each refrigerant. At an evaporation temperature of 50°C, HCFO-1224yd(Z) and HCFO-1233zd(E) showed comparable performance to R245fa, with COP values of about 2.74 and 2.69, respectively (R245fa had a COP value of about 2.66). The same results were also obtained at evaporation temperatures of 60°C and 70°C, at which R1224yd showed good performance compared to R1233zd and R245fa with COP values of 3.6 for 50oC evaporation temperature and 4.75 for 70oC evaporation temperature. Additionally, both suggested refrigerants had low direct emission compared to R245fa based on the results from the environmental analysis

ICT Usage Amongst Lecturers and Its Impact Towards Learning Process Quality

The use of ICT in education has caused substantial changes in learning and brought many benefits to higher learning institutions.However, the development of ICT in the institution of higher education in Indonesia is a minus value compared to other Southeast Asia countries (e.g., Singapore and Malaysia).This is due to several factors which are the lack of knowledge and lack of motivation, especially in Medan, North Sumatera.Medan as the fourth largest city in Indonesia has a low penetration of ICT utilization compared to the other cities which is smaller than it is.Previous studies have found that there is a positive relationship between variables, which are motivation towards ICT usage, knowledge level towards ICT usage, and ICT usage towards learning process quality.This paper addresses the issue by demonstrating a method of study to identify the impact of ICT usage towards learning process quality by lecturers in Medan, Indonesia.As a result, the application of the quantitative research design and data collection through survey questionnaire was considered as the most appropriate method to receive the outcome of the study. Statistical techniques which are the descriptive statistical analysis and regression analysis methods proposed as the means to analyze the data

Solar Air-Conditioning System at the University of Indonesia

Indonesia’s economic growth has continued at a steady rate of approximately 5% to 6% annually, and energy consumption in the entire country has been increasing year by year. Demand for air conditioning in buildings is expanding. In line with this expansion, a 239 kW solar air-conditioning system using a single-double effect combined absorption chiller was installed in a building at the University of Indonesia’s Faculty of Engineering located in Depok city, near Jakarta, with the aim of reducing greenhouse gas emissions. We collected and analyzed data from this air-conditioning system to better comprehend its performance. We report the outline and the performance of the chiller and the air-conditioning system