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Investigation on Neutronic Parameters of the KLT-40S Reactor Core with U3Si2-FeCrAl using SCALE Code
Get PDFFrom a safety point of view, the fuel-cladding of the current design of the KLT-40S reactor still carries a potential risk in the event of a loss-of-coolant accident (LOCA) allowing the formation of hydrogen gas. The concept of accident tolerant fuels (ATF) offers a variety of new safer fuel-cladding materials, one of which is U3Si2-FeCrAl, a potential fuel-cladding combination according to various research sources. In this research, a study of neutronic parameters (1) cycle length, (2) reactivity feedback coefficient, and (3) reactor proliferation resistance was performed with ATF material U3Si2-FeCrAl as fuel-cladding in the KLT-40S reactor core. Modeling and simulation of the ATF-fueled KLT-40S reactor core were performed using KENO-VI and TRITON modules from SCALE code. The results showed that replacement of the fuel-cladding material with the ATF material in the KLT-40S reactor resulted in a shorter cycle length, and the enrichment required to reproduce the original cycle length was above the safeguard limit. The fuel temperature, moderator temperature, and void reactivity coefficient were negative, although not as negative as the original ones. The spent fuel produced at the end of the cycle had good proliferation resistance, although not as good as the original one
Analisis Akurasi Operan Pemain Sepakbola Tim Nasional Indonesia Pada Ajang SEA Games 2021: Babak Kualifikasi Grup: Analysis of the Accuracy of Passing Indonesian National Team Soccer Players at the 2021 SEA Games: Qualification Group Stage
Get PDFPass accuracy is one of the factors that can affect the success of a team in soccer and there is a correlation between the accuracy of the passes and the victory. Therefore, this study aims to determine the total passes and accuracy of passes of Indonesian national team soccer players based on their position when competing in the SEA Games in the group stage. The research method used is quantitative using a descriptive approach to Indonesian National Team soccer players in the 2021 SEA Games group stage. The results show a total of 1601 passes and an accuracy rate of 76.57%. The conclusion of this study is that defenders have more passes than midfielders and forwards and have a higher accuracy of passes than midfielders and forwards. The results of this study are expected to be the basis for further research on match analysis by assessing other technical components in soccer matches.Akurasi operan merupakan salah satu faktor yang dapat mempengaruhi keberhasilan sebuah tim dalam sepakbola dan terdapat korelasi antara akurasi operan dengan kemenangan. Oleh karena itu penelitian ini bertujuan untuk mengetahui total operan dan akurasi operan pemain sepakbola tim nasional Indonesia berdasarkan posisinya ketika bertanding di ajang SEA Games pada babak penyisihan grup. Metode penelitian yang digunakan adalah kuantitatif dengan menggunakan pendekatan deskriptif pemain sepakbola Tim Nasional Indonesia di babak grup SEA Games 2021. Hasil penelitian menunjukkan total operan sebesar 1601 dan tingkat akurasi sebesar 76,57%. Kesimpulan penelitian ini adalah pemain belakang memiliki jumlah operan lebih banyak dibandingkan dengan pemain tengah dan depan serta akurasi operan lebih tinggi dibandingkan dengan pemain tengah dan depan. Hasil penelitian ini diharapkan menjadi dasar penelitian selanjutnya mengenai analisa pertandingan dengan menilai komponen teknik lainnya dalam pertandingan sepakbola
The Economic and Safety Improvement Feasibility of Urban Ocean Fishing Port Modernization – Study Case of Nizam Zachman
Get PDFThe Nizam Zachman Jakarta Ocean Fishing Port (PPSNZJ), the largest fishing port in Indonesia, is currently experiencing overcapacity. This results in ships being moored in rows parallel to berths, indicating the insufficient number of berths in the port. This configuration poses a safety hazard due to the proximity of the moored ships, making it challenging to evacuate them in the event of a fire or other natural disasters. This study was conducted to propose an alternative concept for facility development in urban ocean fishing ports, with PPSNZJ as a study case. The study included a site visit to understand the actual berthing configuration of ships, data collection from the port technical execution unit, and observation of existing fish cargo handling operations. The collected data was analyzed to determine berth capacity and storage productivity, which was used to calculate the number of additional berths required to accommodate loading, unloading, and mooring ships. Based on the design calculations, an alternative development layout is proposed, which fulfils the berth capacity and safety requirements. This study also revealed that the development cost is relatively competitive compared to similar projects
WSN-IoT Forecast: Wireless Sensor Network Throughput Prediction Framework in Multimedia Internet of Things
Get PDFAccurate throughput predictions can significantly improve the quality of experience (QoE), where QoE denotes a network’s capacity to provide satisfactory service. By increasing the results of good throughput predictions, the best strategy can be planned for managing data transmission networks with the aim of better and faster data transmission, thereby increasing QoE. Consequently, this paper investigates how to predict the throughput of wireless sensor networks utilizing multimedia data. First, we conducted a comparative analysis of relevant prior research on the topic of throughput prediction in Multimedia Internet of Things (Multimedia IoT). We developed a throughput prediction framework for wireless sensor networks based on what we learned from these studies using machine learning. The Throughput Prediction Framework identifies historical throughput data and employs these traits to predict throughput. In the final phase, multiple camera nodes and local servers are utilized to test a framework for throughput prediction. Our analysis demonstrates that WSN-IoT predictions are quite precise. For a 1-second time breakdown, the average absolute percentage error for all investigated scenarios ranges from 1 to 8 percent
Pengaruh Aktivitas Jasmani melalui Sepak Bola terhadap Kepercayaan Diri Orang dengan HIV Positif
Get PDFAbstract
Self-confidence is a feeling of confidence in one's abilities without fear and being able to solve all life's challenges without comparing them with the abilities of others. This statement does not apply to people with HIV-positive because the stigma attached to them by society, such as groups of sinners, guilty, recipients of curses, and even torment, lower their self-confidence of people with HIV-positive. Physical activity through football has an important role in changing stigma and is a way for people with HIV-positive to be accepted by society regardless of their status. This study aims to determine the effect of physical activity through football on the self-confidence of people with HIV-positive. The research uses causal-comparative or ex post facto research methods. Sampling used a purposive sampling technique with a sample of 5 people with HIV-positive who participated in football activities. The instrument used is a closed questionnaire using a Likert Scale. Based on the validity test of a valid questionnaire as many as 28 items out of 50 statement items and reliability test results obtained 0.722021 and included in the reliable criteria. Processing and analyzing data, it was found that the score of people with HIV-positive who took part in football activities was 514 from a maximum score of 700 after the percentage of the results was 73.43%. Thus, researchers can conclude that physical activity through football can affect the self-confidence of people with HIV-positive.
Keywords: Physical Activity, Football, Self-Confidence, HIV-PositiveAbstrak
Abstrak Kepercayaan diri adalah perasaan yakin terhadap kemampuan diri sendiri tanpa rasa takut dan mampu menyelesaikan segala tantangan hidup tanpa membandingkan dengan kemampuan orang lain. Pernyataan tersebut tidak berlaku untuk orang dengan HIV positif karena stigma yang dilekatkan masyarakat terhadap mereka seperti kelompok pendosa, bersalah, penerima kutukan hingga azab membuat tingkat kepercayaan diri orang dengan HIV positif menjadi rendah. Aktivitas jasmani melalui sepak bola memiliki peran penting untuk merubah stigma dan menjadi salah satu cara orang dengan HIV positif dapat diterima oleh masyarakat tanpa memandang statusnya. Penelitian ini bertujuan untuk mengetahui pengaruh aktivitas jasmani melalui sepak bola terhadap kepercayaan diri orang dengan HIV positif. Penelitian menggunakan metode penelitian kausal komparatif atau ex post facto. Pengambilan sampel menggunakan teknik purposive sampling dengan jumlah sampel orang dengan HIV positif sebanyak 5 orang yang mengikuti kegiatan sepak bola. Instrumen yang digunakan berupa kuesioner tertutup dengan menggunakan Skala Likert. Berdasarkan uji validitas kuesioner yang valid sebanyak 28 butir dari 50 butir pernyataan dan uji reliabilitas diperoleh hasil 0,722021 dan masuk dalam kriteria reliabel. Pengolahan dan analisis data diperoleh skor orang dengan HIV positif yang mengikuti kegiatan sepak bola sebesar 514 dari skor maksimal 700 setelah dipersentase hasilnya adalah 73,43%. Dengan demikian, peneliti dapat menyimpulkan bahwa aktivitas jasmani melalui sepak bola dapat berpengaruh terhadap kepercayaan diri orang dengan HIV positif.
Kata kunci: Aktivitas jasmani, Sepak Bola, Kepercayaan Diri, HIV positi
Analysis of Motivation Level of Student Physical Activity in Pandemi Covid-19 Bandung
Get PDFMotivation of student physical activity is very influential to carry out student physical activities in this Pandemic period. This study aims to describe the motivation of the physical activity of students in the Covid-19 Pandemic in Bandung. The research method used is a quantitative descriptive method. The population in this study were high school students in Bandung. The sample in this study was students who were quarantined at home during the Covid-19 Pandemic period in Bandung as many as 301 high school students in Bandung. In returning the sample, researchers used cluster sampling. This study uses the Sport Motivation Scale Institute. Data analysis uses the Statistics Kolmogrov Smirnov test for testing data normality and Mann Whitney and Kruskal Wallis tests to find out the difference between the sexes and the city of Bandung. In this study proves that there is a difference between the motivation of the physical activity of male and female students and the difference between regions in the city of Bandung. The results of the analysis show that there is a difference between the level of motivation of the physical activity of male and female students and based on the territory in this pandemic period.Motivasi aktivitas fisik siswa sangat berpengaruh untuk melaksanakan kegiatan aktivitas fisik siswa sehari-hari di masa pandemi ini. Penelitian ini bertujuan untuk menggambarkan motivasi aktivitas fisik siswa di masa pandemi COVID-19 di Bandung. Metode penelitian yang digunakan adalah metode deskriptif kuantitatif. Populasi pada penelitian ini adalah siswa/i Sekolah menengah atas di Bandung. Sampel dalam penelitian ini adalah siswa/i yang sedang dikarantina di rumah selama masa pandemi COVID-19 di Bandung sebanyak 301 siswa/i sekolah menengah atas di Bandung. Dalam pengembilan sampel, peneliti menggunakan cluster sampling. Penelitian ini menggunakan instumen Sport Motivation Scale. Analisis data menggunakan uji statistic Kolmogrov Smirnov untuk pengujian normalitas data dan uji Mann Whitney dan Kruskal Wallis untuk mengetahui perbedaan antara jenis kelamin dan wilayah kota Bandung. Dalam penelitian ini membuktikan bahwa adanya perbedaan antara motivasi aktivitas fisik siswa laki-laki dan perempuan serta perbedaan antara wilayah di kota Bandung. Hasil analisis menunjukan adanya perbedaan antara tingkat motivasi aktivitas fisik siswa laki-laki dan perempuan serta berdasarkan wilayah di masa pandemi in
Modification of Culvert Design on Discharge Channel: A Case Study in Indonesian Coal-Fired Power Plant
Get PDFThe construction of a new CFPP in Indonesia, which was located next to three existing power plants and utilized an existing discharge channel, faced the problem of insufficient capacity of the existing discharge channel to deliver water to four power plants. The problem occurred not only because of the overcapacity of the cooling water flow proposed by the new CFPP but also because of the small size of the culvert located in the discharge channel. This paper discusses several methods to overcome this problem by enlarging the culvert area or by removing the culvert from the channel and replacing it with a bridge. A hydraulic study was investigated using the HEC-RAS software by utilizing inputs obtained from the existing channel geometry and flow measurement data. It was found that additional culverts on both sides with a size of 2 m x 4 m and 3 m x 1 m could reduce the water level by 1.12 m and 0.39 m, respectively. Meanwhile, removing the culvert provided a significant water level reduction of 1.39 m. Enlarging the culvert was chosen as the solution to the discharge channel capacity issue since removing the culvert would require temporarily closing the channel during construction and stopping the operation of the existing power plant
Solution Mapping Tools: Identifying a Bottom-Up Approach to Social Innovation
Get PDFA bottom-up approach to social innovation arises from the issues at the root of the innovation, which usually originates in the lower middle class. An essential approach to design for social innovation is to manage projects with identifiable organizational stakeholders considering relationships in the context of power holders and empowering socially vulnerable and marginalized communities. In local contexts, community participation processes can support grassroots movements toward sustainable systems where the focus is on more complex situations. For a better understanding, the Solution Mapping Tool is explored in this paper through a case study of a workshop held in the least-developed region of Indonesia. The workshop focused on inventing a bamboo distillation device for Moke, a traditional alcoholic beverage made from fermented palm fruits. Using the Solution Mapping Tools, learners were inspired to explore and discover the diverse solutions that communities use and generate daily. The tool helps everyday solutions become visible and identifiable regarding needs, assets, problems and challenges, benefits, and opportunities for the future. The Solution Mapping Tools can also increase learners’ empathy towards people, including communities, by providing a place to learn about their daily lives, experiential knowledge, and context. This paper extends existing publications on distributing and learning about local assets as a pre-design process before applying a participatory-based approach.Desain telah memperluas maknanya melalui inovasi sosial dengan memahami dan menerapkan solusi untuk masalah sosial dan kompleksitasnya. Kolaborasi berbagai pemangku kepentingan dan identifikasi aset diperlukan untuk memahami masalah secara holistik dan mendorong inovasi yang sesuai dengan konteksnya. Pendekatan bawah-atas terhadap inovasi sosial muncul dari masalah yang menjadi akar dari inovasi tersebut, yang biasanya berasal dari masyarakat menengah ke bawah. Pendekatan penting dalam mendesain inovasi sosial adalah mengelola proyek dengan pemangku kepentingan organisasi yang dapat diidentifikasi, mempertimbangkan hubungan dalam konteks pemegang kekuasaan, dan memberdayakan masyarakat yang rentan dan terpinggirkan. Proses partisipasi masyarakat dalam konteks lokal dapat mendukung gerakan akar rumput menuju sistem yang berkelanjutan, yang berfokus pada masalah dan kepentingan bersama. Design Ethnography Lab Institut Teknologi Bandung berkolaborasi dengan UNDP Accelerator Lab Indonesia untuk merancang sebuah alat pemetaan solusi yang dibuat dan digunakan oleh masyarakat. Alat Pemetaan Solusi bertujuan untuk membangun hubungan dan empati dengan masyarakat dan komunitas di suatu tempat untuk belajar tentang kehidupan sehari-hari, pengetahuan pengalaman, dan konteks mereka. Untuk pemahaman yang lebih baik, Alat Pemetaan Solusi dieksplorasi dalam makalah ini melalui studi kasus lokakarya yang diadakan di daerah tertinggal, khususnya di Desa Riangkotek, Provinsi Nusa Tenggara Timur. Lokakarya ini berfokus pada penemuan alat penyulingan Moke yang terbuat dari bambu, minuman beralkohol tradisional yang terbuat dari buah aren yang difermentasi. Makalah ini bertujuan untuk memperluas penelitian yang sudah ada dalam memahami kebutuhan dan aset lokal sebagai proses pra-desain sebelum melakukan pendekatan berbasis partisipatoris
Study of Aquatic Sedimentation Using Electromagnetic Modeling in Flood Hazard Mitigation Scheme
Get PDFThe accumulation of sediment in aquatic environments can lead to an increase in flood risk due to raised floodplains and water levels. Electromagnetic modeling techniques, such as Time Domain Electromagnetic (TDEM) resistivity or lithological conductivity contrast, can be utilized to detect changes in the subsurface. In this study, we investigated the use of TDEM in flood hazard mitigation schemes by developing a 1-D forward modeling program for the central loop configuration in an aquatic environment using the Adaptive Born Forward Mapping (ABFM) method. The program was tested in various environmental conditions, i.e., freshwater, brackish water, and saltwater, to determine its response. The objective is to prevent natural disasters, particularly flooding caused by sedimentation. The TDEM models can generate images of sediment thickness, providing a sensitive response in saltwater environments and enabling the detection of changes in depth compared to other aquatic environments. Overall, this study demonstrated the potential of TDEM as a valuable tool in flood hazard mitigation schemes