Jurnal Online Universitas Teuku Umar
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Evaluasi Kritis dan Model Alternatif Hunter Curves untuk Sistem Plumbing Gedung Bertingkat di Medan
Full text linkClean water is a fundamental necessity in high-rise buildings, so calculating peak water demand is a critical aspect of plumbing system design. So far, planners in Indonesia still rely on Hunter Curves (1940), a classic method developed in the United States and has been used for more than eight decades. The Hunter method is no longer relevant because water consumption patterns have changed, the use of water-saving devices is becoming more widespread, and the characteristics of tropical buildings in Indonesia are different from Hunter's basic assumptions. This study critically evaluates Hunter Curves through a case study of the Lexington Tower Medan Healthcare Building (20 floors, 160 units), comparing the Hunter method with an alternative model based on a locally calibrated Monte Carlo probabilistic simulation (P95). Monte Carlo simulations were performed in 10,000 iterations using MATLAB-based stochastic modeling to obtain peak discharge distributions. The results showed a peak discharge according to Hunter of 34,695 L/s, while the alternative model reached 37,440 L/s (+7.91%). This difference affects the pipe dimensions and pump power, but the additional energy cost (±Rp850,000/year) is commensurate with the increased reliability of the system. This study confirms that Hunter Curves are obsolete and need to be replaced by a more accurate, energy-efficient, and sustainable approac
Perbaikan Kualitas Cetakan Poros Kam (Camshaft ) Menggunakan FMEA dan 2 Sample T test
Full text linkPenelitian ini bertujuan untuk menganalisis dan menurunkan tingkat kecacatan pada proses pembuatan cetakan camshaft melalui pendekatan terintegrasi antara Failure Mode and Effect Analysis (FMEA) dan 2-Sample T-test. Latar belakang penelitian ini berangkat dari tingginya rasio cacat total sebesar 1,00%, melebihi target perusahaan sebesar 0,5%. Analisis kualitatif diawali dengan Fishbone diagram untuk mengidentifikasi akar penyebab cacat, yang kemudian divalidasi menggunakan FMEA. Hasil analisis FMEA menunjukkan empat mode kegagalan utama dengan nilai Risk Priority Number (RPN) tertinggi, yaitu operator tidak memahami instruksi, pola cetakan berkarat, pola cetakan kotor, serta instruksi kerja yang tidak jelas. Rekomendasi perbaikan difokuskan pada revisi instruksi kerja, penerapan prosedur pembersihan pola cetakan, dan pelatihan operator. Selanjutnya, uji 2-Sample T-Test digunakan untuk mengevaluasi efektivitas perbaikan dengan membandingkan data sebelum dan sesudah intervensi. Uji normalitas menggunakan Ryan-Joiner (Shapiro-Wilk) memastikan validitas uji parametrik. Hasil pengujian menunjukkan adanya perbedaan signifikan dengan nilai p < 0,05, dimana total rasio kecacatan cetakan poros kam menurun dari 1,00% menjadi 0,51%. Penelitian ini menyimpulkan bahwa kombinasi metode FMEA dan 2-Sample T-Test tidak hanya mampu mengidentifikasi akar penyebab dan prioritas perbaikan secara sistematis, tetapi juga memverifikasi efektivitas intervensi secara kuantitatif. Pendekatan ini dapat diadaptasi pada berbagai proses manufaktur lain guna meningkatkan kualitas produk dan daya saing industri
ANALISIS DISTRIBUSI SUHU DAN ALIRAN UDARA GREENHOUSE SATU BENTANG MENGGUNAKAN CFD
Full text linkPerubahan iklim mendorong pengembangan teknologi pertanian yang lebih adaptif, salah satunya melalui penggunaan greenhouse. Penelitian ini bertujuan mengoptimalkan desain ventilasi pada greenhouse satu bentang untuk meningkatkan distribusi suhu dan aliran udara. Tiga skenario ventilasi (U1, U2, dan U3) disimulasikan menggunakan metode Computational Fluid Dynamics (CFD), dengan tanaman dimodelkan sebagai media berpori untuk mendekati kondisi nyata. Hasil simulasi menunjukkan bahwa konfigurasi ventilasi sangat memengaruhi kinerja termal dan sirkulasi udara di dalam greenhouse. Desain U1, yang mengandalkan kipas dan ventilasi samping, menghasilkan suhu rata-rata 31,95 °C dan kecepatan udara 0,38 m/s. Desain U2, dengan ventilasi tidak simetris serta bukaan tambahan, menunjukkan suhu 30,37 °C dan kecepatan 0,33 m/s. Desain U3, yang sepenuhnya mengandalkan ventilasi alami dari dinding samping, memberikan performa terbaik dengan suhu terendah sebesar 30,12 °C dan kecepatan udara tertinggi 1,09 m/s. Dibandingkan desain awal, desain U3 menunjukkan penurunan suhu sebesar 5,8% dan peningkatan kecepatan udara hingga 186%. Aliran udara pada U3 juga terdistribusi lebih merata. Validasi hasil menunjukkan bahwa error antar mesh pada ketiga desain berada di bawah 1% (masing-masing 0,779%, 0,294%, dan 0,007%), jauh di bawah ambang batas 5% untuk mesh independence. Hasil ini menegaskan bahwa ventilasi alami dengan bukaan penuh dapat menjadi strategi pasif yang efektif untuk meningkatkan efisiensi pendinginan tanpa ketergantungan pada ventilasi mekanis
Analisis Pengelolaan Keuangan Desa Pada Desa Bonto Jai Kecamatan Bissapu Kabupaten Bantaeng
Full text linkThis study uses a qualitative approach to understand financial planning and management in Bonto Jai Village, Bissappu District, Bantaeng Regency. Data were collected through interviews, documentation, and observation, and analyzed inductively and comparatively. Informants included the Village Head, Village Secretary, and community representatives. The focus of the study was to describe phenomena related to village financial management and compare them with the Village Financial Management Guidelines according to Permendagri No. 20 of 2018. The results of the study showed that village financial management had followed the provisions and principles stipulated in Permendagri Number 20 of 2018. Bontojai Village has implemented stages of financial management which include planning involving community participation, implementation that takes place transparently and accountably, supervision from the Village Consultative Body (BPD), and accountability that is conveyed openly to the community. Keywords: Village financial management, Minister of Home Affairs Regulation Number 20 of 2018, Transparency, Accountabilit
Pengaruh Kualitas Produk dan Promosi Terhadap Kepuasan Pelanggan Melalui Loyalitas Pelanggan
Full text linkPenelitian ini bertujuan untuk mengidentifikasi sejauh mana kualitas produk dan promosi mempengaruhi kepuasan pelanggan serta bagaimana kepuasan tersebut dapat meningkatkan loyalitas pelanggan untuk datang dan membeli kembali di Kopi Bean Spot Alfamart. Populasi pada penelitian ini merupakan pelanggan yang sudah melakukan pembelian sebanyak dua kali dan sampel yang dikumpulkan melalui metode purposive sampling berjumlah 162 responden. Kuesioner disebar antara bulan Januari hingga Maret 2025. Pendekatan analisis data yang diterapkan adalah SmartPLS. Penelitian ini mendapatkan bahwa ditemukan variabel yang berpengaruh terhadap kepuasan pelanggan meliputi promosi dan loyalitas pelanggan, sedangkan untuk variabel yang berpengaruh positif secara langsung terhadap loyalitas pelanggan meliputi promosi. Sementara itu variabel yang tidak mendukung pengaruh secara langsung terhadap kepuasan pelanggan yaitu kualitas produk serta variabel berpengaruh secara tidak langsung dengan peran mediasi kepuasan pelanggan terhadap loyalitas pelanggan meliputi promosi serta variabel yang tidak berpengaruh tidak langsung dengan pemediasi kepuasan pelanggan terhadap loyalitas pelanggan meliputi kualitas produk
Membendung Gelombang Judi Online di Kalangan Santri: Strategi Preventif Berbasis Pendidikan Karakter
Full text linkStemming the Wave of Online Gambling among Santri: An Education-Based Preventive Strategy The increasing involvement of teenagers in online gambling activities raises concerns about the quality of the nation's next generation. This is triggered by easy access to the internet, low digital understanding, and the influence of a less supportive social environment. This community service activity aims to build awareness and understanding of middle school students regarding the risks of online gambling through a series of educational activities, socialization, and psychosocial assistance. The approach used includes interactive delivery of educational materials, life skills training, formation of peer support communities, and counseling services. Program implementation is carried out through synergy between schools, experts, students, and volunteers. This program is expected to increase digital understanding, the ability of adolescents to make wise decisions, and create a safe and supportive digital environment. This activity is a form of applying the results of previous research related to risk factors for online gambling, which are then realized in the form of educational programs in schools. Evaluation was conducted to assess the success of the activity and design sustainability efforts through digital campaigns and school community involvement. Through a holistic and collaborative approach, this program is expected to encourage the formation of a strong young generation free from online gambling practices
Pengaruh Media Sosial TiKToK terhadap Penguasaan Public Speaking Mahasiswa PGMI pada UIN Mahmud Yunus Batusangkar
No full textInterpersonal communication is one of the essential skills that prospective teachers must have, especially in building positive relationships with students, parents, and colleagues. Students of the PGMI Study Program at UIN Mahmud Yunus Batusangkar, as prospective professional teachers, are required not only to master teaching materials but also to have the ability to communicate effectively, empathetically, and provide solutions in various educational contexts. However, based on initial observations and the results of group discussions, it was found that many PGMI students still experience difficulties in expressing ideas, building two-way communication, and conveying messages persuasively and constructively in academic environments and teaching practice. The objectives of this activity are: (1) to increase students' understanding of the concept and importance of interpersonal communication in the teaching profession; (2) to train communication skills that support a humanistic and dialogical learning process; and (3) to shape the character of prospective teachers who are communicative, empathetic, and professional. The training method uses Participatory Action Research (PAR) using a pre-test and post-test measurement system. This training program is designed to strengthen interpersonal communication skills for PGMI students through interactive and practical approaches, such as learning simulations, case studies, role-plays, and reflective discussions. The results of this service are an increase in students' interpersonal communication skills, where before the training, the score was 58.8% in the sufficient category; after being given interpersonal communication training, the students experienced an increase to 88% in the very good category
Evaluation of consumer acceptance of tiger prawn head flour with difference variations in soaking concentration of Rice Husk Ash Filtrate (RHAF)
Full text linkPrawn heads contain chitin about 15%-20%. This high chitin content is an obstacle in the utilization of waste that contains proteins and minerals that are still tightly bound to chitin, which is difficult for poultry digestive enzymes to digest. Therefore, it is necessary to carry out biological processing first so that the proteins and minerals bound to chitin can be broken down so that they can be digested by the poultry. Efforts to minimize chitin are by soaking the husk ash water filtrate solution. This research aims to determine consumer preference for shrimp head flour soaked in a water filtrate solution of husk ash with different concentrations. The treatments in this study were G0 (without soaking), G1 (10% FAS soaking), G2 (20% FAS soaking), and G3 (30% soaking) with a soaking time of 24 hours. The hedonic test was carried out with 30 untrained panelists, and then the data was measured using the Kruskal Wallis test, followed by the Mann-Whitney test at a confidence level of 95%. The concentration of the husk ash water filtrate solution influences consumer acceptance of tiger prawn head flour (Penaeus monodon). Based on consumer acceptance, the best treatment was G1, namely soaking FAS with a concentration of 10% for 24 hours with an appearance value of 7.77 (like very much), smell 6.43 (like), taste 5.77 (somewhat like) and texture 6.87 (like)
PENGARUH SHIFT KERJA TERHADAP POTENSI KECELAKAAN KERJA PADA PT PLN NUSANTARA POWER UNIT PEMBANGKITAN PUNAGAYA KABUPATEN JENEPONTO
Full text linkThis study aims to evaluate the effect of work shifts on the potential for workplace accidents at PT PLN Nusantara Power Unit Pembangkitan Punagaya. Using a quantitative approach, this study involved all 58 employees working in a shift system as the population and sample. Through questionnaires, data were collected for analysis using descriptive methods, instrument testing, classical assumption tests, and simple linear regression analysis. The results of the analysis indicate that although work shifts have a positive effect on the potential for workplace accidents, this effect is statistically insignificant (with a significance value of 0.458 > 0.05). The coefficient of determination (R2) of 0.010 indicates that only 1% of the variation in the potential for workplace accidents can be explained by the work shift variable, while the remaining 99% is influenced by other factors. Thus, this study concludes that the work shift system at PT PLN Nusantara Power Unit Pembangkitan Punagaya is not statistically proven to increase the potential for workplace accidents.Keywords : Work Shift, Potential for Work Accidents, Work Safet
PENGARUH JUMLAH PENDUDUK DAN TENAGA KERJA TERHADAP PERTUMBUHAN EKONOMI DI KOTA MAKASSAR
Full text linkThis study analyzes the influence of population and workforce on economic growth in Makassar City between 2014 and 2023. Using multiple linear regression methods with secondary data, this study found that population does not have a significant influence on economic growth. This indicates that population growth has not been matched by an increase in the quality of human resources (HR) capable of driving economic output. Conversely, the workforce has a significant influence, meaning that the absorption of productive labor contributes significantly to the Gross Regional Domestic Product (GRDP). This research model explains that 73.2% of the variation in economic growth is influenced by these two variables. Based on these findings, it is recommended that the Makassar City government prioritize policies that focus on improving the quality of the workforce and creating jobs to optimize the demographic bonus and encourage sustainable economic growth.Keywords : Population, Workforce, Economic Growt