International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE
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Upgrading Study of Kuwait High Voltage Network 275 KV
Get PDFKuwait transmission network (275 kV network) has a significant increase in short circuit level at some grid and power stations substations above the system limitations (80 % of the rupture capacity of the system 63 kA).This increase results from the growth of power demand and the increase of transmission network complexity. New power stations will be added in the next few years. This paper describes a solution to the problem by splitting the transmission network into three zones as well as constructing new high voltage transmission network (i.e. 400 kV) and connects it with the existing 275 kV network. All the new power stations must be connected to the new 400 kV network and the connection to the 275 kV network must be stopped
A Study of Erosion in the Mfuti Watershed for the Sanitation and Protection of the Zamba-Telecom Road in Kinshasa/DR Congo
Get PDFZamba-Télécom is a road that has suffered erosion for a long time, more particularly gullying, due to poor drainage of runoff water and uncontrolled urbanization of the area in which it is located. We carried out a hydrological study throughout the watershed in which this road is located, in order to best size a canal attached to the road, which will effectively drain rainwater upstream. According to our calculations, to better manage this water, this road must be attached to a free surface canal, with a base of 1.3 m and a height of 1.4 m to thus evacuate a total peak flow of 7.462 m3/s to the Mfuti river. However, after carrying out a field trip, we sampled the soil from this basin and passed it to the laboratory. It turns out that the soil of the basin is mainly made up of fine sand, the grain size of which is 0.05 to 0.4 mm. For our different samples taken, the Atterberg limits gave the average value of the Plasticity Index: 8.8; the liquidity limit: 14.79 and a plasticity limit of 6, this watershed has solid, moderately plastic soil. Therefore, to protect the road from possible erosive phenomena, we should already limit urbanization in this area to limit runoff and instead encourage the infiltration of rainwater. We need to plant enough trees downstream of the watershed and develop best soil conservation practices
Leadership Ability based on Emotional Competence: The Role of Mediation between Strategic Human Resource Management and Team Work Performance
Get PDFThe concept of a Leadership Capability model is based on the development of Emotional Competency which aims to anticipate the combination of Human Resource Management Strategy and team performance. As a statistical test, this research raises four variables, namely: Human Resource Management Strategy, Emotional Competency-Based Leadership Ability, Job Crafting Behavior, and Teamwork Performance. Empirical testing through a survey of 120 respondents, namely the school principal's work team consisting of the principal, deputy principal, and head of administration who are members of the State High School development team in Central Java, Indonesia. Revealed the role of Leadership Ability based on Emotional Competence. In this research, to mediate Strategic Human Resource Management with teamwork performance. There are two limitations, the first is that the survey was only conducted at State High Schools and SKM in the province of Central Java, Indonesia, and the second limitation is that it focuses on the mediator of Leadership Ability Based on Emotional Competence. This does not consider the existence of other variables from human resource management theory. intelligence theory, social exchange, service-dominant logic, agency, and others. At a practical level, the perspective of the relationship between Emotional Competency-Based Leadership Capabilities, Strategic Human Resource Management, and Teamwork Performance provides guidance on how public organizations such as schools can strive for value alignment to encourage Emotional Competency-Based Leadership Capabilities which in turn will improve team work performance
Posture Analysis Using the Rapid Entire Body Assessment (REBA) & Nordic Body Map (NBM) Methods to Reduce the Risk of Musculoskeletal Disorders (MSDs) in Automotive Company
Get PDFThis study aims to identify the operator's posture at work, determine the factors that influence the occurrence of musculoskeletal disorders (MSDs) complaints, and give suggestions for improving the postures. The method used in the research is Nordic Body Map (NBM) and Rapid Entire Body Assessment (REBA). Material handling processes carried out by some operator's production in the line press magazine stamping could be affected body postures. If the company does not carry out an analysis of the situation, it could be impacting the risk of Musculoskeletal Disorders for the operator who is working in this area. Process manual handling was carried out 4800 cycles in a day (8 hours of work) with a bent posture, causing complaints of musculoskeletal disorders (MSDs). The results of Nordic Body Map (NBM) questionnaire processing results scored 75 and 81 points, and the second activity was the REBA assessment when the operator took material from the train. The REBA score was 8. The results of this study have high scores for NBMs and REBAs, requiring investigation and changing work attitudes
Detection and Screening of Some Persistant Organic Pollutants (POPS) in Dogon Ruwa Community of Kaltungo Local Government Area of Gombe State, Nigeria
Get PDF“Persistent Organic Pollutants” (POPs) are chemical contaminants identified by a scientist at World War (II). These contaminants found their way into the environment as a result of human activities such as agriculture, industrialization, and transportation. They are persistent and can travel long-range in the atmosphere to regions where they have never been used or produced, posing serious health effects on humans, wildlife, and aquatic environments. This research has identified some of these pollutants in soil and water samples obtained from four different locations from a community within Kaltungo known as Dogon Ruwa. The samples were analyzed for the presence of these pesticides pollutants. QuECHERS method was adopted for the extraction and cleans up, and Gas Chromatography coupled with a mass selective detector known as Mass Spectrometer was used for detection. Pesticides of interest are Organochlorine (OC) and Organophosphate (OP). Thirteen Organochlorines pesticides (OCP) with their mean concentration in PPM were determined and the value for water given as; Aldrin 63.9ppm, Endrin 27.3025ppm, Endosulfan I 14.31ppm, Endosulfan II, 2.1ppm, Methoxychlor 9.5325ppm, Heptachlor 25.605ppm, Heptachlor epoxide 273.965ppm, Delta-lindane 13.7725ppm, Alpha lindane1446.8625ppm, Gmma-lindane 12.265ppm, P,P-DDE 22.475ppm, P,P-DDD13.2045ppm and P,P-DDT 5.4775ppm. The mean concentrations for soil are; Aldrin 40.1675ppm, EndosulfanI 188.384ppm, Endosulfan II 2.1125ppm, Methoxychlor 1.0125ppm, (Heptachlor 6.795ppm, Heptachlor epoxide 0.14ppm, Delta lindane1.614ppm, Alpha-lindane8.315ppm, Gmma-lindane 12.125ppm, P,P-DDE 3.4525ppm, P,P-DDD 0.485ppm, P,P-DDT 0.485ppm and Endrin 0.645ppm. Five Organophosphates (OP) with their mean concentrations for Water samples include Ethoprophos 0.8075ppm, Disulfan 0.02ppm, Ronnel 3.485ppm, Chlorpyrofos 2030.55ppm and Phosphorodithioic acid 1.8425ppm, and for Soil sample; Ethoprophos 0.2675ppm, Disulfoton 0.0075ppm, Ronnel 3.6575ppm, Chloropyrofos 3,154.9475ppm and Phosphorodithioic 0.7825ppm were detected from each of the samples analyzed
Analysis of Solar Distillation System for Clean Water Distribution : A Review
Get PDFDifferent solar stills technologies is widely reviewed to digest their pros and cons. Solar still is a natural phenomenon of purifying sea and brackish water to provide affordable and reliable potable water. For the technology to be sustainable and utilized on a large scale, productivity needs to be improved. The factors that contribute to the performance of a still were highlighted and analyzed. And the energy and mass balance that takes place in solar still was expressed and defined by different researchers. The efficiency of a still is determined by the temperature variation of the evaporated water in the basin and the outside temperature of the glass cover. The insulation material plays a vital role in the prevention of heat loss and conservation of heat energy to increase the overnight yield when solar energy is not available
Effect Of Zero-Sap Antiwear/EP Lubricant Additives On Nano-Mechanical Properties Of Tribofilms Formed On AISI 52100 Steel Grade
Get PDFNumerous nations have recently passed stricter environmental legislation due to excessive release of harmful emissions like sulfur (S), phosphorus (P), and zinc (Zn) in conventional lubricating oil additives used in contemporary internal combustion engines. Use of borate ester lubricant additives with no sulfated ash, phosphorus, or sulfur effect (zero-SAPS) is one way to reduce this effect. The resistance of tribofilms from oils containing borate esters on AISI 52100 steel grade to plastic deformation is not entirely understood, yet. This study compares Zinc Dialkyl Dithiophosphate (ZDDP) to the tribological performance and Nano-mechanical behavior of tribofilms made from each of the antiwear/extreme pressure borate esters in Polyalphaolefin (PAO6) base oil. According to tribological test findings on a reciprocating steel pin-on-steel plate sliding rig, the boundary films formed by the borate esters reduced friction and wear in a manner similar to that of ZDDP. On the wear scar, the Nano-indentation technique was used to characterize the Nano-mechanical properties of the tribofilms. The ratios of reduced elastic modulus to hardness (E’/H) for the tribofilms of both borate esters are not only higher than the steel substrate but also comparable to ZDDP. This shows that boron-containing tribofilms offered ZDDP-like tribological performance and also have the ability to release absorbed frictional energy when moving across elastic asperity contacts. Consequently, using borate additives in lubricating oils in IC engines is a method of reducing exhaust emission modern vehicles without adversely affecting tribological performance
Effect of Health, education, investment and Unemployment on GDP per Capita in Indonesia
Get PDFThe process of sustainable economic development is reflected in the development of per capita gross domestic product (GDP per capita). This study aims to determine the effect of health, education, investment and unemployment on GDP per capita in Indonesia. The variables used are gross domestic product per capita, average length of schooling, life expectancy, foreign investment and open unemployment rate. This research is motivated by the inequality of GDP per capita in Indonesia. This research uses panel data regression method and random effect model (REM). This study uses secondary data from the Central Bureau of Statistics (BPS). This study uses data for 2015-2020 in 34 Indonesian provinces. The results showed that the average length of schooling, life expectancy, foreign investment and the open unemployment rate had a significant effect on GDP per capita in Indonesia. The policy implication of this research is that in formulating policies in the context of welfare improving (GDP per capita) the government should increase subsidies for aspects of education, health and job creation
Socio-economic Drivers and community perceptions on Invasive Alien Plant Prosopis juliflora in Northern Tanzania
Get PDFProsopis juliflora (P. juliflora) is an invasive plant introduced in Tanzania for restoration and greening the degraded sites. Since its introduction in Tanzania, there has been no assessment about its associated socio-economic drivers and community perceptions in those areas of introduction. In this study, we generated information on socio-economic drivers and community perceptions on this invasive alien plant in Northern Tanzania. We employed multistage stratified random sampling technique for obtaining the sites for data collection within the effective study area. We used Focus group discussion (FDG) to collect data on social economic drivers and community perception on P. juliflora. The results indicate that, community had variation on knowledge about P. juliflora. However, its presences in block A, D, E, F, G and H are driven by the need of shade tree and fuel wood. Community perceive that it is causing effect like displacement of other plants, injuries to both human and domestic animals especially to those blocks (D, E, F and G) with its high density. Together with those effects, communities perceive not to eradicate P. juliflora in their environment unless there will be a substitute species with comparable characteristics and providing similar services obtained from it. In conclusion, the economic and social services obtained from P. juliflora are the major drivers of it to be embraced in the invaded area and majority of communities has decided to live with it in Northern Tanzania. We recommend quick awareness creation to the communities in those invaded areas is inevitable
Lean Thinking Approach to Waste Reduction in The Production Process At Transformer Companies
Get PDFMinimizing all waste (waste) is mandatory for the company. The results of the study using a lean approach, followed by looking at the winding process as a whole, Big Picture Mapping and identification of waste that occurs in business processes, carried out by comparing the actual time to the standard time for the winding process, the value-adding time for the winding process is 21310 minutes. In contrast, the total production time is about 22995 minutes. The non-value-adding time which does not add value to the product is 1685 minutes and identified the cause for the delay using Root Cause Analysis. Waste waiting is the most waste among other wastes