JURNAL POLITEKNIK NEGERI SRIWIJAYA
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COMPARATIVE OF EXCISE STAMP PROCUREMENT USING EOQ AND JIT METHODS
Full text linkThis study aims to compare the efficiency of the Economic Order Quantity (EOQ) and Just in Time (JIT) methods in managing the procurement of excise stamps at PR. Bako Gayo, a cigarette factory in Central Aceh. Using a quantitative descriptive approach, data were obtained through documentation from the SAC Online system and analyzed using EOQ and JIT models to calculate optimal order quantity, order frequency, and total inventory cost. The results show that the EOQ method produced a total inventory cost of Rp 259,272.73, while the JIT method resulted in a significantly lower cost of Rp 97,995.88. These findings indicate that JIT provides greater cost efficiency by minimizing order frequency and holding costs while ensuring compliance with excise regulations. The results confirm previous empirical research highlighting the superiority of JIT in optimizing inventory management under inflationary and regulatory constraints. Based on the research findings, it is recommended that PR. Bako Gayo implement the Just in Time (JIT) method as the primary strategy for procuring excise stamps, as it has proven to be more efficient than the EOQ method. The implementation of JIT needs to be supported by strong coordination with suppliers and an integrated digital inventory monitoring system to ensure smooth production and compliance with excise regulations. This study contributes theoretically by extending inventory management analysis to regulated industries and provides practical and policy insights for improving efficiency in the tobacco sector.
Keywords: Economic Order Quantity (EOQ), Just in Time (JIT), inventory management, excise stamps, cost efficienc
Analisa Kegagalan Impeller pada Circulating Water Pump di PT. PLN Indonesia Power UP Indralaya
Full text linkPompa CWP merupakan pompa yang berfungsi sebagai pompa pendingin dengan memompakan air laut dari cooling tower menuju ke kondensor. Salah satu bagian penting pada pompa CWP yang sering mengalami kerusakan adalah impeller. Impeller berperan dalam meningkatkan tekanan dan mengalirkan air sirkulasi dalam sistem pendingin. Penelitian ini tujuannya menganalisis faktor-faktor terjadinya kegagalan impeller dengan melakukan 3 jenis pengujian meliputi pengujian komposisi, impak, dan metalografi. Hasil pengujian komposisi menunjukkan bahwa material impeller adalah stainless steel austenitik tipe 304. Hasil uji impak pada material impeller SS304 memperoleh nilai rata-rata impak 0,162 J/mm2, tergolong nilai impak yang kecil dibandingkan dengan material baru stainless steel 304 memiliki nilai impak yang tinggi dengan rata-rata sebesar 1,23 J/mm2, dapat dilihat bahwa terjadi penurunan yang signifikan pada ketangguhan impeller. Pengujian metalografi menunjukkan struktur mikro yang terbentuk adalah austenite dan ferrite serta adanya porositas yang mengakibatkan berkurangnya luas penampang material yang menahan beban
Perlakuan Awal Makroalga Gracilaria Sp Menggunakan Deep Eutectic Solvent Untuk Produksi Glukosa
Full text linkProduksi gula dalam negeri di Indonesia belum mampu memenuhi kebutuhan nasional. Pada tahun 2022, permintaan gula mencapai 6 juta ton, sementara produksi hanya 2,2 juta ton, sehingga terjadi kekurangan sebesar 3,8 juta ton. Kesenjangan ini diperkirakan akan meningkat, dengan proyeksi permintaan mencapai 9,81 juta ton pada tahun 2030. Oleh karena itu, diperlukan solusi alternatif untuk meningkatkan produksi glukosa, terutama untuk kebutuhan industri dan energi terbarukan. Penelitian ini mengeksplorasi potensi Gracilaria sp., sejenis makroalga merah, sebagai bahan baku produksi glukosa menggunakan pelarut eutektik dalam (deep eutectic solvent/DES). Proses hidrolisis dilakukan dengan variasi konsentrasi DES (20%, 30%, 50%, dan 90%) pada suhu 60°C, 80°C, dan 100°C selama 60 menit. Hasil menunjukkan bahwa suhu optimal untuk produksi glukosa adalah 60°C. Konsentrasi DES paling efektif adalah 20%, yang menghasilkan glukosa sebesar 1,36%. Temuan ini menunjukkan bahwa Gracilaria sp. berpotensi menjadi sumber glukosa alternatif melalui metode pengolahan yang ramah lingkungan. Penelitian ini diharapkan dapat mendukung pengembangan teknologi berbasis makroalga untuk meningkatkan ketersediaan glukosa nasional dan mengurangi ketergantungan terhadap energi fosil
SISTEM MONITORING DAYA PADA PENGOPERASIAN MOTOR LISTRIK BERBASIS POWER METER
Full text linkIn the industrial sector, 3-phase induction electric motors are widely used as drivers for conveyors, blowers, elevators, and others. Using an induction motor has many advantages, including relatively cheap prices, easy maintenance, and simple construction. When using a 3-phase induction electric motor, electrical power is an important parameter that needs to be considered. Poor power quality can cause a variety of problems, including reduced efficiency, equipment damage and disruption to the electrical system. Therefore, power monitoring is important to identify possible problems and take appropriate corrective or preventive action. Power monitoring can also provide a better understanding of how power quality can affect the operating efficiency and reliability of 3-phase induction electric motors. This can also be valuable knowledge on understanding and optimizing the performance of 3-phase induction electricity in industrial electrical installation practices by using a Power Meter to monitor the power consumed by the electric motor in real time.Dalam bidang industri motor listrik induksi 3 fasa banyak digunakan sebagai penggerak pada conveyor, blower, elevator, dan lainnya. Penggunaan motor induksi memiliki banyak keuntungan diantaranya harga yang relatif murah, perawatan yang mudah, dan konstruksi yang sederhana. Dalam penggunaan motor listrik induksi 3 fasa ini daya listrik merupakan parameter penting yang perlu diperhatikan. Kualitas daya yang buruk dapat menyebabkan berbagai masalah, termasuk penurunan efisiensi, kerusakan peralatan dan gangguan pada sistem kelistrikan. Oleh karena itu, monitoring daya menjadi penting untuk mengidentifikasi masalah yang mungkin terjadi dan mengambil tindakan perbaikan atau pencegahan secara tepat. Monitoring daya juga dapat memberikan pemahaman yang lebih baik tentang bagaimana kualitas daya dapat mempengaruhi efisiensi dan kehandalan operasi motor listrik induksi 3 fasa. Dari data pengukuran didapatkan %Error antara pengukuran dan perhitung <5% dimana nilai ini menunjukan bahwa tingginya akurasi dari sistem monitoring tersebut. Hal ini juga dapat menjadi pengetahuan dalam memahami dan mengoptimalkan kinerja listrik induksi 3 fasa pada praktek instalasi listrik industri dengan menggunakan Power Meter untuk memonitor penggunaan daya yang dikonsumsi oleh motor listrik tersebut secara real time
Analisis Sentimen Pengguna Terhadap Smart Ring Pada Data Twitter Menggunakan Naive Bayes
No full textSmart ring is a ring-shaped wearable device equipped with advanced technology to monitor user activities. Smart ring technology can be used by analyzing user sentiment, a wearable device that is increasingly popular but still faces various challenges of public acceptance. This research is to find out the opinions of users on social media, especially Twitter, and how these sentiments affect consumers' views and purchase intentions. Data was collected by crawling techniques using Google Colab and tweet-harvest tools, after which it was analyzed using the Naive Bayes algorithm to classify sentiment into positive and negative. The results showed that of the 580 tweets collected, there were 147 positive sentiments and 63 negative sentiments after duplicate removal, with an accuracy of 76.19%. This research can help smart ring manufacturers develop products that are more in line with user needs
Pengembangan Sistem Informasi Manajemen Pengelolaan Sampah Digital Kawasan Pantai Kalomang Kabupaten Kolaka: Development of Digital Waste Management Information System for Kalomang Beach Area, Kolaka Regency
Full text linkKalomang Beach is a famous tourist destination in Kolaka. Currently, waste management is carried out in a manner where the garbage pick-up process is carried out when the garbage is full and even pollutes this tourist area, this of course can lead to environmental damage and decreased visitor interest. This research seeks to identify critical issues in waste management at Kalomang Beach and provide an integrated waste management platform to assist the government in assessing waste activities and guidelines. The information provided by this system can improve public health on a local and global scale. The utilization of the SDLC System Development approach in this case the Waterfall method allows for a detailed and appropriate design which tends to be more measurable in terms of time and cost, the use of data modeling through the Unified Modeling Language, and blackbox testing shows that the waste input form is in accordance with the needs of the user where it places groupings of waste types that make it easier for tourist area officers to report the availability of waste that is ready to be picked up. Future system development is important to consider aspects of sustainability, user training, and integration with IOT or microcontroller based waste monitoring systems.
Keywords— Integrated Waste Management Information System, Kalomang Beach, Waterfal
The Traces of Religious Education in the Poem "Sebelum Nyawa Terlepas Raga" by Hartono "John Witir"
Full text linkThis article examines the poem “Sebelum Nyawa Terlepas Raga” by Hartono “John Witir” as a literary work that reflects spiritual and religious values, particularly in the context of awareness of the afterlife. This poem explicitly serves as an invitation for self-reflection on worldly arrogance that has the potential to distance individuals from God, as well as a warning about the dangers of pride that can cloud one’s conscience. This study aims to elucidate the religious educational ideology contained in the poem. Using a qualitative descriptive approach, the object of study is the poem ‘“Sebelum Nyawa Terlepas Raga” itself. The analysis was conducted by applying hermeneutic theory, utilising quotations from the poem that directly represent religious educational values. The data collection process involved three stages: collection, reduction, and presentation of data. Subsequently, the data were analysed descriptively to produce an accurate and comprehensive picture of the characteristics and interconnections of the elements under study. The findings of this study indicate that the poem “Sebelum Nyawa Terlepas Raga” by Hartono “John Witir” contains dimensions of religious relationships that include interactions between humans and God, humans and their fellow humans, and humans and themselves. Of these three forms of religious relationships, the relationship between humans and God is the most dominant aspect in this poem.
Keywords: Poetry “Sebelum Nyawa Terlepas Raga”, Religious Education, Hermeneutic
LEVERAGE, LIKUIDITAS, DAN PERTUMBUHAN ASET SEBAGAI FAKTOR PENENTU PROFITABILITAS PERUSAHAAN
Full text linkThis study aims to identify the effect of leverage, liquidity, and asset growth on profitability. This study focuses on consumer cyclicals and non-cyclicals sector companies listed on the Indonesia Stock Exchange in 2020-2023. In this study, leverage is calculated using the Debt to Equity Ratio, liquidity is calculated using the Current Ratio, and asset growth is calculated using Growth Asset. While profitability is proxied using Return of Equity. The type of data used is quantitative data obtained from secondary sources, namely in the form of annual reports. This study uses a purposive sampling method, with 63 data as the number of samples. Data analysis techniques applied in this study is multiple linier regression analysis. The results of this study state that leverage (DER) has a significant positive effect on profitability (ROE), liquidity (CR) has a significant positive effect on profitability (ROE), and asset growth (GA) has a significant positive effect on profitability (ROE).
Keywords: leverage; liquidity; asset growth; profitability
PENGARUH TINGKAT KESEHATAN BANK TERHADAP HARGA SAHAM
Full text linkBank health level is an important indicator that reflects the stability and financial performance of a banking institution, which can ultimately affect investor perceptions of the bank's shares. This study aims to analyze the effect of bank health level on stock prices in banks listed on the Indonesia Stock Exchange. The research method used is quantitative with a multiple linear regression approach. Bank health level is measured using the Risk-Based Bank Rating (RBBR) method which includes risk factors (risk profile), governance (GCG), profitability (earnings), and capital. Secondary data were obtained from the bank's annual financial reports for the period 2021–2023. The results of the study show that the risk profile and capital variables do not have a significant effect on stock prices, while the GCG and earnings variables have a significant positive effect. The conclusion of this study is that some components of bank health level affect stock prices, so information about the bank's internal performance needs to be a primary concern for investors in making investment decisions..
Keywords: bank health level, stock price, RBBR, GCG, earning
ANALISA SIMULASI PADA KEKUATAN MATERIAL MINI BOILER MENGGUNAKAN METODE FINITE ELEMENT ANALYSIS (FEA)
Full text linkThe advancement of technology today supports the development of production tools in the tofu industry. One such technology in the field of energy conversion has sparked many creative ideas for its application in the industrial world. One of the energy conversion machines is the mini boiler or steam boiler. The mini boiler is capable of converting water into steam, which can be utilized for its pressure and heat. Some tofu industries have already adopted steam-generating production equipment. These conventional steam machines are made of drums that function as steam collectors. In the tofu production process, the mini boiler plays a very vital role. The mini boiler produces high-pressure steam. Therefore, it is necessary to simulate and conduct a structural analysis to improve the efficiency of the mini boiler using the Finite Element Analysis (FEA) method. The material used in this study is stainless steel. This study aims to perform a simulation analysis on the mini boiler in an effort to improve design efficiency, using a method that models and analyzes phenomena related to the system through a numerical approach. The research methodology employed is Finite Element Analysis (FEA) with the assistance of ANSYS 2023 R1 softwareIn the tofu industry, the current advances in science and technology can help the growth of production tools. One of the energy conversion technologies that has generated many innovative ideas to be applied in the business world. One of the energy conversion machines is a mini boiler or steam boiler, which can convert water into water vapor that can be used with pressure and heat. Several industries have already started using this equipment. This conventional steam engine is made of a drum which functions as a steam catcher. In the tofu production process, the boiler has a very vital function. Mini boilers produce water steam at high pressure. Therefore, it is necessary to conduct an ANSYS analysis using the finite element analysis (FEA) method by taking into account the forces, moments and loads received in the mini boiler for the tofu coconut milk boiling process for the tofu industry