Portal Jurnal Politeknik Negeri Semarang
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KAJIAN PENENTUAN SEGMENTASI DAN KELAS AIR DI SUNGAI DOLOK SEBAGAI POTENSI MANFAAT UNTUK AIR BAKU
Get PDFThe Dolok River, which is located between Demak Regency and Semarang Regency,Central Java Province, is widely used by residents to meet their water needs in dailylife. However, as time goes by, pollution occurs which worsens the water quality ofthe Dolok River. One of the contributing factors is the existence of several factoriesand densely populated settlements along the Dolok River. Through this research,researchers intend to determine the division of segments of the Dolok River area,analyze the morphology of the Dolok River, determine the water class of the DolokRiver, predict the potential of water classes for raw water utilization and predict thepotential for raw water supply of Klambu Kudu. The methods used in this researchare the observational study method and the STORET method to determine waterclass. From the results of the analysis, Barang Dam as an upstream river has thecharacteristics of a Barbatu riverbed, relatively small discharge, river erosion andno flooding. Kebon Batur Dam is the middle part of the Dolok river which is atransportation area for erosion from upstream to downstream. Shipping channelsare areas where mud deposits occur, erosion often occurs and causes flooding.Based on the results of field surveys, the morphology of the Dolok River is a braidedtype which generally has relatively small discharge and high levels of sediment. TheDolok River water class calculated using the STORET method is classified as ClassB, namely moderately polluted. Based on the calculation results for determiningwater class by water quality category according to PP No.22 of 2021, the DolokRiver does not have potential as raw water or PDAM drinking water, because it isincluded in the class II category and can only be used as raw water for irrigation at0.52 m3. /sec. Apart from that, there was no potential for raw water supply fromKlambu Kudu to the Dolok River, because it has a different river basin
Evaluation of Fill Pack Damage to the Cooling Effectiveness of Counter Flow Type Cooling Tower in the Oil and Gas Industry
Get PDFIn the oil and gas industry, cooling water is needed to cool various kinds of heat-generating equipment and as a backup water requirement. Cooling water in the industry is usually produced by cooling towers in large quantities. The working principle of the cooling tower by exchanging heat from the hot water of a process with exhaled cold air. There is a cooling tower part called a fill pack and has an important function as a place for heat exchange between water and air. In this research in the oil and gas industry, the cooling tower used is a wet cooling tower type with counter flow flow. The purpose of this study is to determine the current cooling effectiveness of the cooling tower compared to its design data. Calculating the effectiveness of cooling certainly requires water temperature data produced by the cooling tower. The method used in this research is the method of taking water temperature data before and after leaving the cooling tower. The level of cooling effectiveness in the cooling tower will be better if the water temperature produced is cooler than the water temperature when entering the cooling tower.
 
Simulation of Automatic Solar Tracker Control System Using Proteus Application
Get PDFAs a tropical country, Indonesia possesses significant renewable energy potential, particularly from solar and wind sources. However, seasonal variations—such as high solar intensity during the dry season and increased wind speeds during the rainy season—pose challenges to optimizing solar cell utilization. While solar energy presents an ideal solution for clean energy transition, static photovoltaic (PV) systems suffer from efficiency limitations due to their inability to track the sun’s movement. Dual-axis solar trackers can enhance energy efficiency by 25–35% compared to fixed systems, particularly in tropical regions with dynamic solar positioning. However, large-scale physical implementation requires substantial investment, making simulation tools like Proteus essential for computational validation prior to real-world deployment. Proteus facilitates comprehensive modeling of LDR sensors, servo motors, and microcontroller-based control algorithms (e.g., Arduino) in a precise virtual environment. This approach also evaluates the impact of tropical conditions (e.g., humidity, rainfall) on system reliability while optimizing designs to reduce costs. Integrating current research with Proteus simulations offers a robust methodology to accelerate solar tracker adoption in Indonesia
Credit Risk, Liquidity, and Capital Adequacy Levels on Profitability in Conventional Banks on the Indonesian Stock Exchange
Get PDFProfitability is the ability of a bank to generate or obtain profits effectively and efficiently. The study aims to test the impact of Credit Risk, Liquidity, and Level of Capital Fulfillment on Profitability in Conventional General Banks listed on the Indonesian Stock Exchange. The research population is a Conventional General Bank Company that exists in Indonesia and is listed on the Indonesian Stock Exchange in 2019-2022 a total of 47 companies. The sample in this study consisted of 39 Conventional General Banks determined by purposive sampling. The total of observations in this study is 156 observations. The analytical technique used to test the hypothesis is double linear regression analysis. The results show that Credit Risk (NPL) and Capital Satisfaction Rate (CAR) have no impact on profitability. Liquidity (LDR) has a positive and significant impact on profitability. Further research can use and develop other free variables such as: solvency, financial distress, company size and others
Maximizing Company Value: Unveiling the Impact of Capital Structure and Size, with Profitability as the Key Player
Get PDFThe purpose of this study is to examine the Effect of Capital Structure and Company Size on Company Value with Profitability as an Intervening Variable. The population of this study consists of companies in the food and beverage industry sector listed on the Indonesia Stock Exchange from 2018 to 2022. The data collection method used is purposive sampling. The information used was lower to be collected using the literature research method. The study was conducted on 51 companies. The data analysis technique uses the multiple linear regression method with the application of SPSS and the Sobel test. Capital structure has a positive influence on profitability, whereas company size does not affect profitability. Capital structure affects the value of the company, while the size and profitability of the company do not affect the value of the company. Furthermore, profitability cannot mediate the relationship between capital structure and firm value, and profitability cannot mediate the relationship between firm size and firm value. Overall, these findings may encourage further revision and development in financial management theory, especially in terms of how firms should prioritize and manage factors such as capital structure and size to achieve their goals. More research may need to be done to explore the specific conditions that influence these associations
THE IMPACT OF AUDIT QUALITY, AUDIT COMMITTE, AND INTERNAL CONTROL SYSTEMS ON FINANCIAL REPORT QUALITY (IDX FINANCE SECTOR)
Get PDFThe objective of this study is to examine the impact of audit quality, audit committees, and internal control systems on the quality of financial reporting. The study population consists of financial companies listed on the IDX during the period 2018-2022. Secondary data in the form of annual reports were obtained from the website www.idx.co.id, and data were collected from 230 financial companies using the purposive sampling method. This study uses multiple linear regression analysis with the help of SPSS version 25. The results indicate that the internal control system has a positive impact on the quality of financial reports. However, neither audit quality nor audit committee has any effect on the quality of financial reports
Analyzing the Relationship Between Capital Structure, Profitability, and Their Impact on Company Value in Consumer Goods Subsector Manufacturing Companies Listed on the Asean Stock Exchange
Get PDFThis study investigates the impact of capital structure and profitability on the company value of consumer goods subsector manufacturing companies listed on the ASEAN Stock Exchange from 2019 to 2022. The primary objective is to determine how these financial metrics influence the valuation of firms in a highly competitive and dynamic market. Utilizing panel data analysis, this research analyzes 168 companies selected through purposive sampling based on specific criteria, including consistent financial performance and market capitalization. Descriptive statistics reveal significant variation in capital structures, with an average debt-to-equity ratio (DER) of 3.503 and profitability, measured by return on equity (ROE), averaging 1.253. The common effect, fixed effect, and random effect models were evaluated, with the random effect model deemed most appropriate based on Hausman and Breusch-Pagan tests. The regression analysis shows that both DER and ROE positively and significantly impact company value, as indicated by the price-to-book ratio (PBV). The findings underscore the importance of strategic financial decision-making in enhancing firm value. Higher DER suggests effective leverage use, while increased ROE indicates efficient management and strong financial performance, both contributing to higher firm valuations. This study contributes to the academic understanding of corporate finance within the ASEAN consumer goods sector and provides practical insights for managers, investors, and policymakers to optimize financial strategies and enhance competitiveness
PENGARUH AFFILIATE MARKETING, LIVE STREAMING, PROGRAM GRATIS ONGKOS KIRIM DAN FLASH SALE TERHADAP KEPUTUSAN PEMBELIAN DI TIKTOK SHOP
Get PDFPenelitian ini bertujuan untuk mengetahui dan menganalisis pengaruh affiliate marketing, live streaming, program gratis ongkos kirim dan flash sale terhadap keputusan pembelian pada pengguna aplikasi Tiktok shop di Pekalongan. Data primer dari kuesioner yang disebar akan digunakan untuk penelitian ini. Populasi yang digunakan dalam penelitian ini adalah pengguna TikTok Shop di Pekalongan dengan 100 responden adalah sampel yang dipilih menggunakan teknik purposive sampling sesuai dengan kriteria penelitian ini. Pendekatan kuantitatif dalam penelitian ini didapatkan bahwa analisis regresi linear berganda dilakukan menggunakan program statistik SPSS 26. Penelitian ini menghasilkan bahwa terdapat pengaruh positif dan signifikan variabel affiliate marketing terhadap keputusan pembelian, tidak terdapat pengaruh variabel live streaming terhadap keputusan pembelian, tidak terdapat pengaruh variabel program gratis ongkir terhadap keputusan pembelian, dan terdapat pengaruh variabel flash sale terhadap keputusan pembelian. serta tedapat pengaruh affiliate marketing, live streaming, program gratis ongkos kirim, dan flash sale terhadap keputusan pembelian secara simultan sebesar 52,7%
PENERAPAN MIXER PLANETARY GUNA MENINGKATKAN PRODUKTIVITAS USAHA IRT RARA KITCHEN DI DESA PABELAN KABUPATEN SUKOHARJO
No full textIndustri Rumah Tangga (IRT) RaRa Kitchen merupakan salah satu pelaku usaha yang memproduksi kue berupa bolu kukus yang telah dikenal masyarakat di Kab.Sukoharjo. Pengelolaan usaha khususnya pada pencampuran adonan dilakukan dengan menggunakan alat bantu mixer berkapasitas kecil. Untuk memenuhi permintaan konsumen, proses pencampuran adonan dengan mixer yang ada dilakukan secara berulang. Sehingga, penggunaan mixer secara terus-menerus setiap hari dengan beban produksi yang besar berakibat menimbulkan panas berlebih, rusaknya komponen mixer, dan membutuhkan waktu&tenaga operator yang banyak. Keterbatasan dana menjadi kendala utama mitra untuk mengganti mixer yang lebih modern sesuai dengan kapasitas produksi. Penggunaan mixer dengan kapasitas kecil pada proses produksi membuat produktivitas rendah dan pengelolaan usaha kurang efektif untuk memenuhi kebutuhan pelanggan. Metode yang digunakan dalam kegiatan pengabdian yaitu metode gabungan antara penyuluhan dan pelatihan serta transfer teknologi. Hasil dari kegiatan pengabdian meliputi: transfer teknologi berupa teknologi mixer planetary dengan kapasitas kapasitas 10-15liter dan bertambahnya pengetahuan & wawasan mitra terkait dengan penggunaan teknologi melalui kegiatan penyuluhan dan pelatihan penggunaan teknologi mixer planetary. Seluruh rangkaian kegiatan ini mampu meningkatkan produktivitas dan kualitas produk, mempersingkat waktu serta meminimalisir penggunaan tenaga manusia serta menurunkan biaya produksi
PENGABDIAN MASYARAKAT DI SB AL AMIN, SIKL MALAYSIA TENTANG EFISISENSI ENERGI LISTRIK
Get PDFKegiatan Pengabdian Kepada Masyarakat dilaksanakan di salah satu Sanggar Bimbimgan Al Amin Sentul Sekolah Indonesia Kuala Lumpur Malaysia. Kegiatan ini bertujuan untuk menjelaskan potensi penghematan energi listrik melalui penggunaan lampu LED, yang akan dibandingkan dengan jenis lampu lainnya seperti lampu pijar, TL, dan CFL. Simulasi perhitungan konsumsi daya dari masing-masing jenis lampu akan ditampilkan, dengan fokus pada lampu penerangan yang memiliki daya yang sama namun menghasilkan cahaya dengan tingkat lumen yang berbeda. Selain itu, akan ditunjukkan hasil perhitungan mengenai potensi penghematan pada tagihan listrik dengan mengganti lampu lama dengan lampu LED. Diharapkan, hasil sosialisasi mengenai penghematan energi ini dapat meningkatkan pemahaman peserta tentang lampu LED. Tim juga akan mengarahkan peserta pelatihan untuk merasakan manfaat dari kegiatan ini jika diterapkan dalam masyarakat.Siswa-siswa peserta pelatihan di Sekolah Indonesia Kuala Lumpur (SIKL) di akhir prlatihan ini sudah mulai bisa memahami dan menerapkan potensi penghematan energi khususnya energi listrik sebagai upaya untuk mendidik mereka berpola efesien terutama dibidang kelistrikan yang digunakan setiap hari di Malaysia khususnya