International journal of engineering science and technology最新文献

{"title":"PERFORMANCE ANALYSIS OF THE THERMOELECTRIC TEC 12706-BASED COOLING SYSTEM IN COOLER BOX DESIGN","authors":"Abdul Muchlis, Kurnia Yogo Utomo, T. Mulyanto, Kurnia Yogo, Utomo, Supriyono Tri, Mulyanto","doi":"10.56127/ijst.v2i1.859","DOIUrl":"https://doi.org/10.56127/ijst.v2i1.859","url":null,"abstract":"The most widely used refrigeration machine today is a refrigeration machine that operates with a vapor compression cycle (SKU). To operate a vapor compression machine, refrigerant is needed as a working fluid. The most widely used refrigerants are chlorofluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) refrigerants. However, their use can damage the ozone layer and has a great potential to increase the effects of global warming. Therefore, a refrigeration system that is environmentally friendly and also has low power is needed, this can be fulfilled by using thermoelectric. This research was conducted to analyze the performance of temperature differences, heat absorbed, cooling capacity and COP in thermoelectric-based cooler boxes, thermoelectric performance with variations in input voltage and with variations in the addition of heatsinks where the method used is experimental by controlling the variable input voltage. From the research results, the calorific value absorbed is proportional to the increase in the applied voltage. Where the greater the voltage applied, the heat absorbed will be higher and the input power that enters the thermoelectric module is directly proportional to the incoming voltage where the greater the voltage. Then the power that goes into the thermoelectric will also be even greater. Whereas the COP value will decrease as the voltage increases and the best thermoelectric performance is with a voltage of 10 V. This can be seen after 60 minutes, the temperature difference value is 6.6 0K, the absorbed calorific value is 19,150 W, and the COP is 0.921. The thermoelectric performance is not only based on the COP value but also based on a review of the electric power consumed and the cooling speed during the 60 minute test. Then for the addition of a copper heatsink the COP value is 0.4832 and the temperature drop in the cooler box is only 3.9 0K, the value is lower than without the additional heatsink due to the gap between the aluminum heatsinks.","PeriodicalId":14145,"journal":{"name":"International journal of engineering science and technology","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74812827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANALYSIS OF DEMAND FORECASTING FOR TEMPEH PRODUCTS AT INDONESIAN TEMPEH HOUSES USING THE HOLT-WINTERS ADDITIVE METHOD APPROACH","authors":"Arief Nurdini, Ardhy Lazuardy","doi":"10.56127/ijst.v2i1.854","DOIUrl":"https://doi.org/10.56127/ijst.v2i1.854","url":null,"abstract":"Rumah Tempe Indonesia is an MSME engaged in processing soybeans into tempeh products. The production system used is made to stockThis production system can cause problems, including the amount of production that does not match consumer needs, causing a shortage or excess of products which are very inefficient for the company's business continuity. For this reason, a study was carried out to determine the forecast for the demand for GMO Tempe at Indonesian Tempe Houses for the next 12 periods using the Holt-winters method and to determine the accuracy of the forecast made. The method used in this research is the Holt-winter method with the help of Ms. Excel Where. The final result of the research using Holt-winters has a level of forecasting accuracy90.1515344%, which means it is very good at predicting the demand for tempe in the future. Forecasting results in periods 37 to 48 respectively are 13372PCS, 12367PCS, 14196PCS, 12848PCS, 16655PCS, 15965PCS, 18032PCS, 15107PCS, 15132PCS, 17969PCS, 14267PCS, 21498PCS.","PeriodicalId":14145,"journal":{"name":"International journal of engineering science and technology","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88964026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"REDESIGN OF IPUSNAS APPLICATION USING USER CENTERED DESIGN METHOD","authors":"Muhammad Rafi Pradana, Nuryuliani","doi":"10.56127/ijst.v2i1.866","DOIUrl":"https://doi.org/10.56127/ijst.v2i1.866","url":null,"abstract":"The National Library of Indonesia (Perpusnas) is one of the libraries that already uses a Digital Library named Ipusnas. Ipusna provides access to literature available at National Library via smartphone. However, the Ipusnas application only gets a rating of 3.5 on the Google Playstore. This rating was obtained because the Ipusnas android application still has deficiencies, which is the User Interface and User Experience are still less modern and confusing in finding information. In this study, a redesign was developed using the User Centered Design method and Tested using A/B Testing. Results of the System Usability Scale Questionnaire From the calculation results using the System Usability Scale formula, the average score for evaluating the Ipusnas android application is 61.2. From the results of this SUS score, the research can be continued so that the Redesign of Ipusnas android application better than old one. Based on the evaluation results using the A/B Testing method, it can be concluded that users prefer the new design with a percentage value of 64% compared to the old design of 36%.","PeriodicalId":14145,"journal":{"name":"International journal of engineering science and technology","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79724665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"HUMAN GENDER DETECTION SYSTEM BASED ON FACIAL IMAGE USING CONVOLUTIONAL NEURAL NETWORK ALGORITHM","authors":"Abdul Roid, I. Maurits","doi":"10.56127/ijst.v2i1.847","DOIUrl":"https://doi.org/10.56127/ijst.v2i1.847","url":null,"abstract":"The demand for system automation has been continuously increasing with the current technological developments. One of these advancements is in the implementation of face recognition. Camera capabilities have evolved from merely capturing images or videos to being able to process the resulting images. Facial images contain a wealth of information, one of which is the gender information of the individuals. To obtain this information, facial image classification using deep learning is required. In this scientific paper, the author utilizes the Convolutional Neural Network algorithm implemented with the Python programming language and employs TensorFlow as its framework. The research aims to predict human gender based on facial images. The dataset used in this study is obtained from the kaggle.com dataset provider, consisting of 9,600 male facial data and 9,600 female facial data. The data is divided into a training and testing set, with an 80% ratio for training data and a 20% ratio for testing data from the total available data. The model training process is performed for 15 epochs with 768 steps in each epoch. The testing results show that the Convolutional Neural Network method achieves a validation accuracy of approximately 91%. The developed program runs well through a webcam.","PeriodicalId":14145,"journal":{"name":"International journal of engineering science and technology","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80951895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SELF-ACTUALIZATION APPLICATION IN HELPING HUMAN CHARACTER DEVELOPMENT BASED ON FLORENCE LITTAUER PERSONALITY TEST BASED ON ANDROID","authors":"Tangguh Destio Pramono, Guntur Eka Saputra, Josephine Haneta Excelentia Savitri Dinarbrata, Haikal Ardikatama, Sinatrio Bimo Wahyudi, Adam Rozaq Sobari","doi":"10.56127/ijst.v2i1.547","DOIUrl":"https://doi.org/10.56127/ijst.v2i1.547","url":null,"abstract":"A midlife crisis is a stage when a person feels anxious, worried, and confused about their purpose in life. This condition occurs when a person currently doubts their future and quality of life. The quarter-life crisis phase can be overcome with better self-awareness, better self-awareness and appreciation, and increased user productivity. Therefore, self-realization is the right solution to survive the Quarter Life crisis. Self-actualization (selftuazion) offers several interesting features tailored to the needs of users in self-actualization, such as self-assessment, ToDo application and statistics, interesting articles, self-introduction pages, motivational quotes, and reminder notifications to help in the process of loving yourself. The results of the pilot test on 22 target group respondents showed that the functions contained in Selftuazion had a good effect on respondents in overcoming the problem of Quarter Life Crisis. This application produces 20 pages with features that are in accordance with self-actualization, based on the results of testing with users that the application can be used properly and get a score of 88 in the acceptable category with grade B or Good.","PeriodicalId":14145,"journal":{"name":"International journal of engineering science and technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83064697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CONSTRUCTION DESIGN FOR 4.5 BAR WATER TUBE TYPE BOILER USING SOLIDWORKS 2018 SOFTWARE","authors":"A. Ariyanto","doi":"10.56127/ijst.v2i1.557","DOIUrl":"https://doi.org/10.56127/ijst.v2i1.557","url":null,"abstract":"Distillation or simple distillation uses the principle of separating two or more liquids based on differences in the boiling points of each component. The distillation process itself has two main stages, namely the evaporation stage and the condensation or condensation stage. Therefore, distillation equipment uses a heating device in the form of a boiler and a cooler in the form of a heat exchanger. In the refining process, the heart of the distillation system lies in the boiler as a steam producing component. Therefore, the effectiveness of the boiler to produce saturated steam greatly determines the results of the refining process. To determine the power of the boiler, it is necessary to analyze the Boiler simulation calculations which include Von misses, displacement and safety factor simulations. The simulation is carried out at a pressure of 4.5 Bar which produces a Von misses max value. of 3.444 MPa, with the highest displacement value of 0.002 mm and the smallest value of 0 mm, and produces a safety factor value of 75. With this safety factor value, it can be said that the frame construction is safe.","PeriodicalId":14145,"journal":{"name":"International journal of engineering science and technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83169763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RECOPTIC APPLICATION DEVELOPMENT WITH ARTIFICIAL INTELLIGENCE ON DRUG DETECTION FEATURE FOR VISUALLY IMPAIRED PEOPLE","authors":"Guntur Eka Saputra, Annisa Umulfath, Firman Abdurrahman, Ahmad Mawardi Hakim, Muhammad Haikal, Manfred Michael","doi":"10.56127/ijst.v2i1.276","DOIUrl":"https://doi.org/10.56127/ijst.v2i1.276","url":null,"abstract":"Recoptic application is an optical recognition application. This application is equipped with TalkBack and the application of artificial intelligence so that the camera on the smartphone can detect and provide information about drugs, text, and objects. Recoptic is currently implemented on Android smartphones and applies the image-to-text converter technology with Optical Character Recognition (OCR). The camera can detect the text on the drug cover and the type of drug, and the application will read out the information with TalkBack. Recoptic has been tested with a user acceptance test (UAT) from experts in medical disciplines and potential users, namely blind people. Features in the application include a voice to guide users and drug detection to read and provide information with sound, objects, and text. The application has been tested and received input with the user acceptance test (UAT) method from experts and blind users. Based on the test results and data collected, as many as 923 drugs have been acquired, and the resulting more than 80% UAT is considered successful for the subject by blind people. Recoptic is implemented on Android-based smartphones.","PeriodicalId":14145,"journal":{"name":"International journal of engineering science and technology","volume":"103 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75689582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"APPLICATION OF THE AGILE – SCRUM METHODOLOGY TO REVAMP KPI (KEY PERFORMANCE INDEX) SYSTEM AT PT SOHO GLOBAL HEALTH","authors":"Wisnu Sukma Maulana","doi":"10.56127/ijst.v2i1.562","DOIUrl":"https://doi.org/10.56127/ijst.v2i1.562","url":null,"abstract":"PT. Soho Global Health (SOHO) is a provider of health products and supplements that has 2500 employees. The overall performance of these employees is assessed on an annual KPI (Key Performance Index). Problems arise due to technology systems that were previously perceived to be very slow for processing KPI data online. New system changes that are designed with faster performance need to be done or in other words revamp the system. Substitution of a whole new system or revamp system at Soho needs to use the Agile methodology approach. Agile methodology especially the Scrum model can overcome problems that arise in the system development process, especially in the speed of processing time, many modules and complex, and also involves many teams both the development team and many elements of related users. Given that, the KPI system at SOHO processes data from thousands of employees from many divisions as a whole.","PeriodicalId":14145,"journal":{"name":"International journal of engineering science and technology","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87432674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANALYSIS AND DESIGN OF CONCEPTUAL MODELS OF DATA WAREHOUSE IN ARISTY WEDDING ORGANIZER","authors":"Isni Oktria, Dyah Cita Irawati","doi":"10.56127/ijst.v2i1.554","DOIUrl":"https://doi.org/10.56127/ijst.v2i1.554","url":null,"abstract":"Wedding Organizer is a business that specializes in services that specifically help the bride and groom and families in the planning and supervision of the implementation of a series of events into a wedding party. The necessity of designing a conceptual model of data warehouse on a wedding organizer devoted to designing the model and the data flow that existed at the wedding organizer. The data warehouse is a collection of data from various sources placed together in a safae place for querying and reporting processes. The conceptual model of the data warehouse is a logic design that represents the data. Data warehouse design method used in the study is the dimensional data modeling Powell. The study resulted in the design of data into multiple tables then the tables is determined which inculeds the dimension tables and fact. The identification process is intended to design a star schema, snowflake schemas, and the fact constellation schema of existing data on the wedding organizer CV . Aristy so that in the future can be created a wedding organizer information system for CV. Aristy","PeriodicalId":14145,"journal":{"name":"International journal of engineering science and technology","volume":"88 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73675063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytochemicals content and in-vitro antioxidant properties of Azadirachta indica seeds, leaves and twigs prepared from different extraction techniques","authors":"Javid Ali, Inayatur Rehman, Javed Abbas Bangash","doi":"10.4314/ijest.v14i4.2","DOIUrl":"https://doi.org/10.4314/ijest.v14i4.2","url":null,"abstract":"The current study was design to exploit the Azadirachta indica leaves, seeds and twigs for %yield, phytochemicals content and antioxidant activities using infusion, hydroalcoholic, decoction and microwave extraction techniques. The phytochemicals contents were determined by standard reported methods. While antioxidant activity was assessed by three (03) standards In-vitro antioxidant test systems as 1, 1’-diphynyl- 2-picrylhydrazyl (DPPH), Hydrogen peroxide (H2O2) scavenging activity and Nitric oxide (NO) scavenging activity method using ascorbic acid as standard. The highest extractive yield was observed in seed were 44.00±02% (infusion), 38.00±00% (Hydroalcoholic) and 20.00±03% (decoction). Followed by leaves and twigs parts of neem. The high amount (+++) phytochemicals contents were extracted from neem leaves infusion and hydroalcoholic extracts as compared to seeds and twigs neem parts with decoction and microwave extraction methods. The highest Azadirachta indica (neem) leaves infusion extract showed at 1000 mg/L remarkably inhibited DPPH inhibition activity (85±01), H2O2 scavenging activity (83±01%), and NO scavenging activity (78±01%). The antioxidants activities showed a dose dependant manner, the higher the concentration showed high antioxidant activities. The results pointed to the significant antioxidant activities of the leaves infusion and hydroalcoholic extraction techniques, the overall strength being in the order of infusion >hydroalcoholic >decoction >microwave in leaves, seeds and twigs extracts. In all cases, the extracts obtained from leaves showed higher antioxidant activity and higher phytochemicals contents than the other extraction technique obtained from seeds and twigs. The results indicate that Azadirachta indica leaves, seeds and twigs extracts have potent antioxidant activities that would have beneficial effects on human health and infusion extracts are superior with better antioxidant potential. ","PeriodicalId":14145,"journal":{"name":"International journal of engineering science and technology","volume":"188 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78049438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}