Portal Jurnal Politeknik Negeri Semarang
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Analisis Aliran Sirkulasi Alami di Bagian Pendingin Berdasarkan Variasi Temperatur Air Pemanas pada Untai Rektangular TP FASSIP-04 Ver.2
Get PDFSistem pendingin pasif berbasis mekanisme sirkulasi alami menjadi topik hangat dalam sistem keselamatan PLTN karena tidak membutuhkan pasokan listrik dan juga lebih ekonomis, maka perlu dilakukan penelitian untuk memperoleh karakteristik pendinginan pada bagian tangki pendingin perlu dipelajari mengingat proses pendinginan dilakukan dengan model tidak langsung. Tujuan penelitian yang dilakukan adalah untuk menganalisis aliran sirkulasi alami di bagian pendingin berdasarkan variasi temperatur air pemanas pada Untai Rektangular TP FASSIP-04 Ver.2. Penelitian dilakukan untuk memperoleh karakteristik perubahan temperatur pada bagian tangki pendingin berdasarkan variasi temperatur air pemanas serta bilangan Reynold dan laju aliran yang terjadi terhadap variasi temperatur. Metode penelitian dilakuan secara eksperimental dengan memvariasi temperatur air pemanas dari 50oC, 60oC, dan 70oC dengan daya pemanas 4,2 kW dan temperatur air pendingin ditetapkan pada 20oC. Pengolahan data menghasilkan grafik karakteristik temperatur dan laju aliran yang terjadi. Hasil eksperimen menunjukkan bahwa berdasarkan laju aliran sirkulasi alami yang terjadi pada bagian tangki pendingin Untai Rektangular TP FASSIP-04 Ver.2 untuk variasi temperatur air pemanas 50 oC sebesar 1,32 LPM berada pada rejim aliran laminar dengan bilangan Reynold bernilai 1851 sedangkan pada temperatur air pemanas 60 oC dan 70 oC sebesar 1,61 LPM dan 1,94 LPM berada pada rejim aliran transisi yang secara berturut-turut bilangan Reynold bernilai 2624 dan 3716. Kenaikan gradien temperatur antara sisi panas dan sisi dingin telah meningkatkan laju aliran sirkulasi alami dan mempengaruhi rejim aliran yang terbentuk
PENERAPAN DAN SOSIALISASI PIPA RESAPAN HORIZONTAL PADA MUSLIMIN SCHOOL DI THAILAND
Get PDFThis article presents the socialization and implementation of Horizontal Infiltration Pipes at Muslimin Schools in Thailand. The aim of this socialization is to introduce the research findings of Dr. Ir Edy Susilo, MT Lecturer at Semarang University, where using a simple pipe can have the ability to absorb runoff or flood water that is absorbed into the ground. In this socialization, participants consisting of teachers and students in carrying out community service activities showed that the training participants were able to properly know and understand knowledge in the field of piping and hydro which aims to be an alternative for storing water in the ground
ANALISIS FAKTOR-FAKTOR YANG MEMENGARUHI KEPATUHAN WAJIB PAJAK ORANG PRIBADI UMKM
Get PDFThe purpose of the study was to analyze: (1) The influence of digitalization of the tax system on taxpayer compliance, (2) The influence of taxpayer understanding on taxpayer compliance, (3) The influence of taxpayer awareness on taxpayer compliance, (4) The influence of digitalization of the tax system, understanding of taxes, and simultaneous taxpayer awareness on small micro business (SMEs) individual taxpayer compliance. Data was collected using questionnaires and documentation. The population studied was all SMEs individual taxpayers registered at the East Denpasar Pratama Tax Service Office. The sample was taken from 100 taxpayers using the Slovin formula with convenience sampling technique. The data analysis technique is the Partial Least Square technique at a significance level of 5%. The research results show that (1) Digitalization of the tax system has a positive and significant effect on taxpayer compliance, (2) Taxpayer understanding has a positive and significant effect on taxpayer compliance, (3) Taxpayer awareness has a positive and significant effect on taxpayer compliance, (4) Digitalization of the tax system, tax understanding, and taxpayer awareness simultaneously have a positive and significant effect on SMEs individual taxpayer compliance
STRATEGI PENGEMBANGAN KOMPETENSI PELAKU USAHA UMKM MENUJU KEBERLANJUTAN USAHA
Get PDFThis study aims to analyse business profile factors through human resource profiles, ICT skills, external environmental support and financial literacy skills that affect business sustainability. The research was conducted using a qualitative research design. The data collection method used interview techniques with five informants from MSME actors in Manding Village, Temanggung, Central Java and triangulated sources to analyse the validity of the data. The results of this study show a description of the condition of business management in Manding Village, Temanggung seen from the profile of SME resources, competence in using ICT, external support and financial literacy. From the interview results, it can be seen that there is still a lack of training intensity, business socialisation assistance, especially related to marketing, technology use and business financial management. Employees only focus on the production process and product manufacturing. There is still a lack of competence in the use of ICT and business financial management. Currently, MSME players in Manding Village, Temanggung still rely on their own capital because there is no capital assistance, incentives or business management facilities from related agencies. The implications of this research are expected to be a consideration for the government to improve the competence of MSME entrepreneurs through training and financing
PENGARUH GOOD CORPORATE GOVERNANCE DAN FIRM SIZE TERHADAP PROFITABILITAS
Get PDFThis study aims to analyze the influence of the board of commissioners, audit committee, independent commissioners, institutional ownership, board of directors, and company size on the profitability of banking financial companies listed on the Indonesia Stock Exchange (IDX) in the 2019-2022 period. The research sample comes from banking companies listed on the IDX during the 2019-2022 period. The datacollection technique in this study used a purposive sampling technique.The data were obtained from publicly available financial company reports with a population of 12 banking companies according to the criteria. Basedon the results of hypothesis testing it was found that the board ofcommissioners and ownership of financial companies have an influence on company performance, while the audit committee, independent commissioners, board of directors, and company size have no influence onfinancial company performance
ANALISIS PERHITUNGAN HARGA POKOK PRODUKSI PADA UMKM CHICKEN KATSU KARAWANG DENGAN METODE FULL COSTING
Get PDFThe calculation of the cost of goods produced is very important for all businesses. However, there are still many entrepreneurs who do not calculate in detail the cost of goods sold. This can cause misinterpretation of the assumption of profit or loss of a business. This research focuses on calculating the cost of goods produced in one of the Chicken Katsu Karawang MSMEs. With the calculation and comparison of the calculation of COGS of the full costing method and the estimated COGS of the business, it is hoped that it can help determine the appropriate product selling price. This research uses interviews, observations, and literature. With the full costing method, the result of the COGS calculation is Rp652, - higher per product. So that there are differences in profit assumptions. Therefore, Chicken Katsu MSMEs are advised to calculate all raw material costs, variable overhead costs and fixed costs in detail and apply the full costing method as a business calculation method in order to determine the actual cost of goods sold
Mass Ratio Influence on Vortex-Induced Vibration of a Flexible Cylinder using Large Eddy Simulation at Re=1000
Get PDFThe study investigates the phenomenon of vortex-induced vibration (VIV) using Large Eddy Simulation (LES) at a Reynolds number of 1000, focusing on transitional flow conditions. LES has proven effective in understanding VIV across Reynolds number regimes, aiding in comprehending flow physics and mechanisms behind VIV. The research aims to contribute data for validating numerical models and informing engineering practices. The study employs the Navier-Stokes equation and the continuity equation to analyze fluid flow, treating it as incompressible due to negligible density changes. The three-dimensional incompressible momentum equation is discretized using the finite volume method within the spatial domain. Resolution of the pressure Poisson equation ensures compliance with free divergence conditions, enhancing computational fluid dynamics simulations' reliability. Validation of the fluid flow solver involves comparing computed drag force coefficients with established benchmarks, showing agreement within small discrepancies. The study delves into vibration behavior induced by cross flow at various reduced velocities (), noting distinct patterns ranging from irregularities at low ย to quasi-periodic behavior at higher values. Analysis of maximum cylinder displacement () across different reduced velocities and mass ratios underscores the complex relationship between system parameters and displacement dynamics. A consistent occurrence of y_max at a specific reduced velocity highlights its significance, while varying mass ratios affect displacement patterns, indicating the importance of understanding these dynamics for optimizing fluid-structure interaction systems
PEMBUATAN DAN UJI PERFORMA TERMAL ALAT PENGERING SKALA LABORATORIUM DENGAN PENAMBAHAN THERMAL ENERGY STORAGE (TES) BERBASIS PHASE CHANGE MATERIAL (PCM)
Get PDFPengeringan merupakan salah satu metode pengawetan yang paling banyak digunakan untuk memperpanjang masa simpan produk pertanian, makanan, dan bahan lainnya. Penelitian ini bertujuan untuk merancang dan membangun alat pengering skala laboratorium yang inovatif dengan integrasi thermal energy storage (TES) berbasis phase change material (PCM) menggunakan paraffin wax sebagai media penyimpanan energi. Metode yang digunakan meliputi desain alat, perakitan, dan pengujian performa. Paraffin wax dipilih karena sifatnya yang mampu menyimpan dan melepaskan energi panas secara efisien pada rentang suhu pengeringan yang dibutuhkan. Penelitian ini secara khusus mengevaluasi kinerja termal dari alat pengering untuk mendapatkan karakteristik sistem berupa distribusi temperatur di ruang pengering, distribusi temperatur pada media TES, dan distribusi temperatur udara keluar alat pengering melalui cerobong. Hasil investigasi menunjukkan bahwa penambahan TES berbasis PCM paraffin wax mampu menjaga stabilitas temperatur di ruang pengering. Hal ini nantinya akan berdampak positif pada efisisensi sistem secara keseluruhan
PENGARUH PENGGUNAAN E-WALLET SHOPEEPAY DAN PROMOSI CASHBACK TERHADAP PERILAKU KONSUMTIF MAHASISWA
Get PDFKemajuan teknologi menyebabkan aplikasi marketplace yang menyediakan pembayaran digital untuk mempermudah para customer dalam melakukan sebuah transaksi. Salah satunya adalah Shopee, Shopee mengeluarkan layanan dompet digital yang disebut Shopeepay yang digemari oleh masyarakat untuk melakukan transaksi dalam aplikasi marketplace Shopee. Penelitian ini bertujuan untuk menganalisis pengaruh penggunaan e-wallet shopeepay dan promosi cashback terhadap perilaku konsumtif mahasiswa. Populasi pada penelitian ini adalah mahasiswa di Kota Semarang sebagai pengguna Shopeepay. Untuk sampel yang diambil adalah 60 responden, dengan menggunakan parameter yang diestimasai (diukur). Pengambilan sampel menggunakan teknik purposive sampling, dengan metode pengumpulan data penyebaran kuesioner kepada responden. Hasil penelitian ini menunjukkan bahwa e-wallet shopeepay secara bersama-sama berpengaruh terhadap perilaku konsumtif mahasiswa. Sedangkan promosi cashback secara bersama-sama tidak berpengaruh terhadap perilaku konsumtif mahasiswa