1,669 research outputs found

    An Overview of Work Contentment: A Social Analysis of Lebanese and US Workers

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    This paper studies and investigates workers in USA and Lebanon, their observed mood of work satisfaction as well as their occupation in both service and manufacturing businesses. The outcomes demonstrate unanticipated divergences and resemblances in the workers’ replies. Hypotheses, founded on Hofstede’s Individualism (IDV), foresees that national variances in Lebanon and USA would lead to a greater insight into work contentment of workers in USA vs. their counterparts in Lebanon

    Automated Online Questionnaire Development

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    Online questionnaire is an integrated survey management system that includes a range of technology to meet your survey and research needs. From target list integration to real-time feedback for respondents and automated analysis and reporting, Survey Suite provides a comprehensive solution to most survey requirements. This system developed the traditional questionnaire for researchers to increase the benefits of the system. Nunamaker method 1991 will be taken as the development procedure of this system. Rely on evaluation process the researcher found that, the researchers who using online questionnaire system were pleased and satisfied; the effectiveness of using online questionnaire system is so useful. The researcher considers that, the online questionnaire system as one of the education processes is important to help researchers to get easy way to the evaluation

    EFFECTIVENESS OF SOURSOP LEAF EXTRACT (Annona muricata .L.) ON THE MORTALITY OF GRAYCOOL CATERPRISES (Spodoptera litura)

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    Annona muricata extract with a concentration of 20% during the day showed an average value of 29%, the afternoon 1:14%, whereas 40% at a concentration of 29% the morning, during the day 86%, and afternoon 1.14%. Concentration of 60% and 1.14% morning, afternoon and evening 1.43% 1.14%. Results of Kruskal-Wallis statistics on mortality of Spodoptera litura showed a significant difference between the P values ​​indicated by early spraying time (0.317), noon (0.254), and late (1,000). With treatment A.muricata extract statistical results Kruskal-Wallis P value <0.05. A.muricata extract treatment given to the mustard plant as much as 10 ml each spraying. Based on the observation and analysis of the data it can be concluded that the extract of A. muricata at a concentration of 20%, 40%, and 60% can affect the mortality of Spodoptera litura

    THE INFLUENCE OF INTEGRATED GUID INQUIRY LEARNING MODEL TECHNOLOGICAL PEDAGOGICAL CONTENT KNOWLEDGE CONCEPT ORGANIZATIONAL SYSTEMS OF LIVING THINGS ON METACOGNITIVE SKILLS AND CRITICAL THINKING ABILITY OF STUDENTS JUNIOR HIGH SCHOOL (SMP) BURU

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    The guided inquiry learning model integrated with Technological Pedagogical Content Knowledge is a combination of learning models and approaches that utilize technology in the learning process. This study aims to improve students metacognitive skills and critical thinking skills. The material taught in this study is the system of living organizations (cells). This research was conducted in February 2021 in Buru District, Maluku Province. This research was conducted in three schools namely SMP Negeri 5 Buru, SMP Negeri 9 Buru and SMP Negeri 16 Buru, by using a quasi-experimental design type. The populations of this study were VII.a and VII.b at SMP Negeri 5 Buru, SMP Negeri 9 Buru and SMP Negeri 16 Buru, each with a total of 66 students. Data analysis used the Non-Parametric test with the Chi-Square test. The results of this study indicate that, in the metacognitive study there was no effect on SMP Negeri 5 Buru experimental and control classes and experimental class SMP Negeri 9 Buru with a sig > 0.05, while in the control class SMP Negeri 9 Buru and experimental and control classes at SMP Negeri 16 Buru the sig <0.05 it can be concluded that it has an effect. On critical thinking skills at SMP Negeri 5 Buru, SMP Negeri 9 Buru and at SMP Negeri 16 Buru in the experimental and control class the value is sig <0.05. Based on these data, it can be concluded that there is an influence of the guided inquiry learning model integrated with Technological Pedagogical Content Knowledge on students' critical thinking skills. &nbsp

    Assessment of Waste Heat Recovery in the Steel Industry

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    A considerable portion of the energy consumed in the steel industry is rejected as waste heat from the electric arc furnace. Capturing this energy impacts the efficiency of production significantly by reducing operating costs and increasing the plant’s productivity. It also presents great opportunities to increase the industry’s competitiveness and sustainable operation through a reduction in emissions. This work presents an assessment of steel manufacturing and demonstrates the potential of thermal energy storage systems in recovering heat from the high-temperature exhaust fumes of the electric arc furnace. Our investigation entails mapping the material and energy requirements of one of two-phase of the current steel production method, i.e. natural gas reforming for syngas production, direct reduction of the iron ore, and secondary refining to obtain the steel in the electric arc furnace. Analysis of an obtained electric arc furnace off-gas temperature and flow rate profiles are then used as a basis for the development of a waste heat recovery model. Simulation results from the waste heat recovery module reveal that in a period of 4 days, an output power of 2108 kW per tap-to-tap cycle can be achieved from a continuous charge electric arc furnace. This can be harnessed and used either internally or externally in the steel manufacturing process. This is inevitably coupled with a reduction in CO2 emissions, which works to actively address climate change

    Electricity and Water Cogeneration Utilizing Aluminium Furnaces Waste Heat Integrating Thermal Storage Organic Rankine Cycle

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    High energy-intensive industries, including steel, chemicals, cement, and aluminium, contribute to about 75% of the industrial emissions of carbon dioxide globally and expelling large amounts of unrecovered waste heat into the atmosphere. Yet, there has been a challenge of studies that are conducted on recovering waste heat in the aluminium industry, especially in cast-house facilities, due to technical difficulties such as energy fluctuations in mass flow rate and temperature. In this study, the waste heat to power system is designed to generate power and freshwater in a cast-house facility with 18 furnaces by evaluating three methods in which the temporal waste heat from holding furnaces can be damped and exploited. These methods are: (1) implementing a temporal air injection, (2) optimising furnaces operation time shift, and (3) integrating sensible thermal heat storage. Organic Rankine Cycle is used for the waste heat to power conversion. The appropriate thermal energy storage design and a thermodynamic model of an Organic Rankine Cycle are investigated using temporal flue gas data that are collected on site from three furnaces. Reverse Osmosis technology is applied to produce water using the generated electricity. Results show that sensible heat thermal energy storage is the most suitable technology for damping the fluctuations of waste heat. By utilising waste heat from 18 remelting furnaces, a net power output of 323 kW can be produced to operate a Reverse Osmosis plant supplying 2419 m3 of fresh water daily, saving up to 2000 metric tons of carbon dioxide emissions annually. This study gives a comprehensive approach to deal with temporal waste heat in aluminium furnaces for smooth cogeneration
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