Application of Thermo Electric Cooler (TEC) as a Low Cost and Environmentally Friendly Technology in Air Conditioning Systems

The use of environmentally unfriendly chemicals (refrigerants) in Air Conditioners (AC) can damage theozone layer in the earth's atmosphere which has an impact on global warming. Therefore, an environmentallyfriendly cooling system is needed in the application of the Thermo Electric Cooler (TEC) cooling moduletechnology. TEC when supplied with DC voltage (direct current) one side will become hot, while the otherside will be cold, to maximize the cooling process, the hot side of TEC must be lowered as low as possibleby using a fan, heatsink and thermal paste (thermal grease). Using 6 pieces of TEC 12 V 6A, dimensions 40x 40 mm and 4 mm thick. TECs are arranged in parallel and electricity is arranged in series. TEC when thepower supply is connected to an electric current source, operating the 6 TECs attached to the heatsinkarranged in parallel and in series will cause one side to cool down (heat absorbed) and the other side tobecome hot (heat released). What causes the cold side of TEC to cool is the flow of electrons from a higherenergy level to a lower energy level. To find out the temperature of the Peltier cold results using a DHT22sensor with an Arduino microcontroller with a programmed temperature that automatically turns off and on.For the breaker or automatic switch using a 5-volt relay. the use of air conditioners per day (6 hours) issubject to tariffs Rp. 3,212 and the use of air conditioners for a month (30 days) every day the use of 6 hoursis subject to tariffs Rp. 96,360, so as to enjoy a safe and comfortable atmosphere by using environmentallyfriendly and low-cost technology

Customer Preferences and Satisfaction Analysis of Video Conference Application for Productive Activities Using Kano Model

The rapid development of communication technology and the increasing need for long-distancecommunication in the Covid-19 pandemic era have made video conferencing applications play a vital rolein human productive activities, such as working, studying, doing hobbies, and more. The increasing needhas spurred video conferencing application providers to increase customer satisfaction so that it remainsthe first choice for the customers. To win the competition in this sector, video conferencing applicationproviders should understand and provide the application design that provides maximum satisfaction to thecustomers. Therefore, this study aims to analyze customer preferences and satisfaction with the designattributes of the video conference applications which refers to the three most popular video conferencingapplications in Indonesia: Zoom, Google Meet, and Skype. This study used the Kano Model to identifycustomer preference and satisfaction with the 46 identified design attributes of the video conferencingapplication. The Kano Model analysis used quantitative and qualitative approaches to produce the priorityof importance for each design attribute based on customer preferences and the impact of each attribute oncustomer satisfaction. Based on the Kano Model resulted, there are 19 attractive attributes, 1 must-beattribute, 15 one-dimensional attributes, and 9 indifferent attributes. We also obtained the best proposed design attributes where 37 attributes refer to the Zoom application, 6 attributes refer to the Google Meetapplication, and 3 attributes refer to the Skype application. This study contributes to helping videoconferencing application providers to develop their products better as well as being a reference for thosewho want to develop new video conferencing applications that can satisfy customers well. This study alsohas an impact as a reference in evaluating consumer satisfaction on video conferencing applications inIndonesia

Customer Satisfaction Analysis with Importance Performance Analysis on Academic Services at Faculty of Dentistry, University X

Service is the key to success in various businesses or activities of a services. The success of a service can beseen when the customer receives the service as expected. Based on data at the Faculty of Dentistry UniversityX, student satisfaction score on academic services are still low. The purpose of the study was to determinethe level of student satisfaction and evaluate the attributes of academic services in the Dental ProfessionalEducation program, Faculty of Dentistry, University X. Data was collected using a questionnaire with theService Quality method (SERVQUAL) which consists of 5 dimensions, Reliability, Tangibles, Assurance,Responsiveness, and Empathy. Data processing using SPSS 25, the Customer Satisfaction Index method(CSI) is used to determine the level of student satisfaction with the quality of academic services, ImportancePerformance Analysis method (IPA) is used to determine the attributes of academic services that must bemaintained and improved. The results of this study indicate that the level of student satisfaction withacademic services is 80.23%. The results of the IPA analysis show that there are 2 attributes that must beimproved in quadrant A Assurance dimension, V9 (Ease of reporting work results) and V10 (Ease ofobtaining the information about grades and work progress)

Decision Support System for New Employees Candidat Selection PT. Dawam Prima Perkasa Using Aras Method Web Based

Employees are one of the supporting factors for a company, because by having qualified employees,according to the qualifications and criteria needed by the company, then the company can develop and moveforward in the future. No exception, PT. Dawam Prima Perkasa who is in need of new employees who aresuitable to work in the company. However, PT. Dawam Prima Perkasa is faced with a problem where thelarge number of prospective employees who take the selection test will cause the number of incoming filesto be adjusted to the criteria owned by the company and require a lot of time, making it prone to file errors.To minimize the occurrence of errors and the length of time used, a Decision Support System was created todetermine the best prospective employees who will work in the company. The Decision Support SystemMethod used is the Additive Ratio Assessment (ARAS). This research has gone through the process ofvalidating the Spearman rank correlation and the value is 0.950. Based on these results, the ARAS methodcan be used in selecting prospective new employees at PT. Dawam prima Perkasa

The Covid-19 Presence Monitoring System in Water uses Biosensors and Artificial Intelligence based on the Internet of Things

Water is a source of life for humans, therefore its quality needs to be maintained in order to avoidcontamination of COVID-19. Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) orCOVID-19 is a pandemic virus that attacks the respiratory system and it is contagious to humans.Therefore, we need a system that can monitor and detect this virus in surface water sources. Earlydetection of water contaminated by COVID-19 is important to solve problems in handling the quality ofwater contaminated with the virus or not. The proposed monitoring system consists of several tools andprocesses including biosensors, microcontrollers, classification using K Nearest Neighbor (K-NN) todetect contaminated water or not, and firebase as data storage. Classification results are stored in firebaseand displayed on the frontend application based on the web. The frontend application can be accessed bythe user. The frontend application also displays a graph that describes the water content periodically and areference for the location of the water area contaminated by the virus is displayed

The Measurement of Technology Acceptance for Information Services in ‘ABC’ University Library Using Technology Acceptance Model

An adoption of technology always produces two reactions, namely acceptance or rejection. Senayan librarymanagement system is a library management system that is able to organize, organize, provide services,that finally producing an information that can help managers and library members. This study aims todetermine the extent to which technology in information services at the ‘ABC’ Library is received and toexamine the relationship of factors that influence the acceptance and use of these technologies by using theTAM (Technology Acceptance Model). Assessment is generated from primary data in the form ofquestionnaires distributed to 379 respondents. The veripative statistical analysis method in this study usesSEM (Structural Equation Model) with the software used is Amos 24. Based on the results of the research,PEOU has a positive effect on PU because the P value (0.013) <0.05, PEOU has no positive effect onBITU because P value (0.660)> 0.05, PU has a positive effect on BITU because P value (0.000) <0.05, andBITU has a positive effect on AU because the value of P (0.003) <0.05

Determining The Need of Tank Cars In The Fuel Distribution Process to Pertashop at XYZ Company

XYZ Lahat Company is one of the companies operating in South Sumatra region. This company uses Fleetor Tank Car (TC) as a mode of transportation in distributing fuel products to Pertashop. The constructionof Pertashop in Lahat, South Sumatra, has increased 22% since beginning of the program in May 2021.There are partners who join the construction of 5 units/month of Pertashop and the growth rate ofPertashops affects the number of Thruput by 143 KL/month, whereas the needs for transportation is alsoincreasing, such as the number of needs for fuel products. The method used for mapping is clustering andfor calculation used proportional. The data analysis includes the capability of the car fleet. In conclusion,321 Fleets can be fulfilled with an increase in ritase of 6.02 rit/day which can optimize the fuel distributionprocess and meet consumer needs

Designing SOP for Quality Document Control in Rumah BUMN Bandung using Business Process Management Method

The role of Micro, Small and Medium Enterprises (MSMEs) is very important for a region, especially asone of the drivers of economic growth in the region. In order to create efficiency, wider market reach,attract more customers and better business opportunities, MSMEs must enter the digital businessecosystem. Rumah BUMN (RB) is an initiative program of BUMN and the Ministry of BUMN tostrengthen Micro, Small and Medium Enterprises (MSMEs). Rumah BUMN Bandung is one of the activeRumah BUMN and there are many activities under the auspices of Bank BRI. As the digital businessecosystem develops, more and more MSMEs are joining Rumah BUMN Bandung. Implementation ofdocumentation at Rumah BUMN Bandung only reached 12.5%, mainly focused on training programs outof a total of 8 existing programs. The reason is that there is no comprehensive implementation of qualitydocument control standards at Rumah BUMN Bandung. As a result, Rumah BUMN Bandung employeesoften have difficulty finding documents, sometimes documents that have expired are still being used, andthey make mistakes in providing documents to fellow employees. This research aims to describedocuments that need to be controlled, design SOPs for quality document control, and create use casediagrams. The method used in this research is Business Process Management (BPM). In an effort to dealwith existing problems, SOPs and use case diagrams of the quality document control process will bedesigned

Designing Improvements to the Product Attributes of Sling Bags Based on Consumer Preferences Using the Conjoint Analysis Method

The Covid-19 pandemic, which ended in early 2023, has increased people's needs and provided newopportunities for businesses in the clothing/fashion sector. The object of this research is a company thatoffers various bag products such as backpacks, sling bags, hand bags and others. However, one of thecompany's product categories, namely sling bags, experienced a decline in sales during 2022. Thecompetition of companies engaged in clothing/fashion makes the company have to maintain its business.The purpose of this research is to design improvements to sling bag product attributes based on consumerpreferences. The Conjoint Analysis method is used to determine consumer preferences for sling bag productattributes so as to improve purchasing decisions and retain company customers. The number of samples usedwas 93 respondents with the majority of students aged 18-35 years. The final results of the study are themost important attributes and attribute level utility values, namely neutral color attributes (black, gray,white), price attributes IDR 80,000-Rp160,000, small size attributes 2.3 L (24 x 16 x 6 cm), canvas materialattributes, hobo bag model attributes, and feature attributes, namely 3-4 partitions, waterproof, andpermanent straps. The results of the study can be used to provide an overview of the company's consumerpreferences in sling bag products and can be a consideration for companies in releasing new products

Method of Economic Order Quantity (EOQ) as an Analysis of Raw Material Inventory Control at PT Metalindo Main Engineering

PT Metalindo Teknik Utama is a company engaged in Manufacturing (body of a car). So far, in managingraw material inventories, the company used simple method with buy raw material if the inventory is out ofstock. The use of this method resulted in the cost of managing the raw materials incurred is still relativelyexpensive. This study aims to analyze the cost of inventory management based on the Economic OrderQuantity method and compare the costs of inventory management implemented by the company in 2020.The data is taken based on the company's annual financial statements prepared in 2020. The data isanalyzed using the EOQ formula. Results of the research in the form off O2, the number of economicalorders according to EOQ is 141 tube with a raw material inventory cost of Rp. 6,771,277 while accordingto the company's method of Rp. 25,542,451 then obtained savings or a difference of Rp. 18,771,174. InCO2 the number of economical orders according to EOQ is 130 tube with a raw material inventory cost ofRp. 6,770.777, while according to the company's method it is Rp. 23,601,184 then the savings ordifference is Rp. 16,830.407. For LPG, the number of economical orders according to EOQ is 31 tubeswith a raw material inventory cost of Rp. 1,447,350 while according to the company's method it is Rp.4,631,372 then the savings or difference is Rp. 3,184,022