Jurnal Online Universitas Teuku Umar
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Penerapan Siklus Plan-Do-Check-Act (PDCA) untuk Mengurangi Pemborosan dalam Industri Jasa
Get PDFThis research aims to increase the efficiency of aging time in the car refurbished process in T XYZ by applying the PDCA (Plan-Do-Check-Action) method. The company's main problem is the high number of idle cars due to aging times that exceed standards, especially in repair, service, and preparation activities. The research methods used include identifying the root of the problem using a fishbone diagram, designing solutions using the 5W+1H approach, improving implementation, and evaluating results. Implementation results show a decrease in the average aging time: in repair from 5,333 to 3,833 days, in service from 6 to 3,333 days, and preparation from 1,333 to 0.967 days. The number of idle cars also decreased gradually to reach 86 units with an actual aging time of one day. These findings prove that implementing PDCA effectively increases the efficiency of the refurbished process, reduces time waste, and supports increased company operational performance. This research contributes to developing continuous improvement practices in the automotive industry. It can be a reference for other service companies that are optimizing productivity through a quality management approach
Analisis Vegetasi dan Indeks Keanekaragaman Gulma pada Budidaya Kacang Tanah di Desa Ujung Tanoh Darat, Meureubo, Kabupaten Aceh Barat
Get PDFABSTRACTThe presence of weeds in peanut cultivation areas can cause a decline in productivity. In Ujong Tanoh Darat Village, farmers do not use mulch in peanut cultivation, making them more susceptible to weeds and greatly affecting crop yields. This study aims to identify the types and diversity of weeds in peanut cultivation fields in Ujong Tanoh Darat Village. The research location was selected using purposive sampling. Data collection was carried out using the quadrat method by placing 10 plots measuring 0.5 m2 x 0.5 m2 randomly. Seven weed species were found in peanut cultivation fields, including Melochia corchorifolia L., Eleusine indica, Spermacoce latifolia, Ludwigia octovalvis, Cyperus sphacelatus Rottb., Paspalum paniculatum L., and Echinochloa crus-galli L. Eleusine indica (SDR 46.98%) and Melochia corchorifolia (SDR 27.30%) were found to have the highest dominance levels, while Paspalium paniculatum L (SDR 3.27%) had the lowest. The diversity index (H' = 1.356) and weed evenness (E = 0.697) indicated moderate diversity with uneven population distribution. Meanwhile, the species richness index (Dₘg = 1.27) was low due to the dominance of certain species. This condition confirms that the presence of dominant weeds has the potential to significantly reduce peanut productivity, so control needs to be focused on sustainable strategies through an Integrated Weed Management (IWM) approach that combines mechanical, cultural and chemical methods selectively.Keywords: Diversity, Eleusine indica, Peanuts, Vegetation Analysis, Weeds
Pengaruh Jenis Mulsa dan Dosis Mikoriza Arbuskula Terhadap Pertumbuhan Dan Hasil Tanaman Tomat (Lycopersicum esculentum Mill)
Get PDFTomatoes are plants with a short life cycle, can grow as high as 1 to 2 meters. This plant has green, yellow and red fruits that are usually used as vegetables in cooking or eaten directly without being processed. Tomatoes have stems and leaves that cannot be consumed because they are still in the same family as potatoes and eggplants that contain alkaloids. The problems that arise today are unsuitable climate conditions and less supportive soil conditions. This is because cultivating tomatoes with soil temperatures that are too high can cause excessive evaporation so that the percentage of groundwater loss increases. This will have an impact on the inhibition of the nutrient absorption process. Therefore, it is necessary to make efforts to provide mulch and provide biological fertilizers. The aim of this research was to determine the effect of mulch type and arbuscular mycorrhiza dosage on the growth and yield of tomato plants. This research was carried out in Langsa City using a factorial group random design (RAK), namely the Mulch Type Factor with the notation (M) consisting of 4 levels, namely control, silver black plastic mulch, sugarcane bagasse mulch, rock mulch and Arbuscular Mycorrhiza dosage factor with the notation (F) consists of 4 levels, namely control, 5 gr/plant, 10 gr/plant, 15 gr/plant. The results of the research showed that the influence of the type of mulch had a significant effect on plant height, fruit weight and average fruit weight per plant as well as an interaction between the type of mulch and the dose of plant height and weight per fruit.Keywords: tomato plants, type of mulch, arbuscular mycorrhiza
Pengaruh Penambahan Jerami Dan Additive Beton Mix Terhadap Kuat Tekan Dan Lentur Beton
No full textThe purpose of this study is to determine the properties collected from Botto Village of Sidenreng Rappang Regency in a uniform and comprehensive manner and to determine the relative strength and relative durability of concrete made using rice waste and additives using these materials. It is a complement to the practical study. The tests were carried out after 7 years of treatment, 14 days and 28 days, using 15 x 30 cm long cylindrical test tubes. It used 9 cylindrical and 2 jet models, each showing 5% and 10% difference. %. 9 cylindrical and 2 block tests were carried out for normal concrete, and 33 parameters were measured in these tests. According to the test results, the compressive strength of the concrete after 7 years with the addition of 5% grass and concrete mixture is 5.94 Mpa. and the total of 10% grass and concrete mixture is 7.83 Mpa. 14 years plus 5% grass and concrete mixture, this is 9. 06 Mpa for 10% grass and concrete mix 8.28 years plus 10.57 Mpa for 5% grass and concrete mix and 9.81 Mpa for 10% grass and concrete mix. Key words: straw, compressive strength, concrete mix, flexural strengt
UTILIZATION OF NYPA FRUIT (Nypa fruticans) AS A NATURAL INGREDIENT IN THE PRODUCTION OF LIQUID BATH SOAP RICH IN VITAMIN C
No full textThis research aims to utilize nipah fruit juice (Nypa fruticans) as a natural source of vitamin C in the production of liquid bath soap that is rich in vitamin C. This research was experimental using a Completely Randomized Design (CRD) with the treatment of nipah fruit juice concentration added to the liquid soap formulation, including 0%, 5%, 10%, and 15%. The resulting soap was tested for organoleptic characteristics, physical characteristics (pH value, foam stability, homogeneity) and chemical characteristics (vitamin C content). The results of the study showed that the addition of nipah fruit juice significantly affected the parameters of color, aroma, and vitamin C levels, but had no significant effect on foam stability and homogeneity. The highest color and aroma parameters were obtained in treatment P1, namely 5 (very much like) and 4 (like). However, in other treatments, the lowest value was still acceptable to the panelists, namely 3 (neutral). The highest vitamin C value was found in formulation P4 (15%), namely 3.282 mg/mL. The highest pH value of soap was obtained at P1 (0%) which was 5 and the lowest was obtained at P2 (5%), P3 (10%) and P4 (15%) which was 4. Foam stability in each treatment obtained a value of >95%. Based on the observed assessment parameters, the best formulation was obtained in treatment P4
POTENSI TINDAK PIDANA KORUPSI DALAM PENGELOLAAN DANANTARA (ANALISIS PERSPEKTIF SISTEM HUKUM)
Get PDFThe establishment of the Daya Anagata Nusantara Investment Management Agency (Danantara) through Law No. 1 of 2025 represents a strategic initiative by the government to integrate state assets and strengthen the national economic structure in pursuit of Golden Indonesia 2045. With direct presidential authority and initial capital of at least IDR 1,000 trillion, Danantara holds a strong and independent institutional position. However, this institutional design raises serious concerns, particularly regarding the oversight system in fund and budget management. Given the inherent and sometimes unpredictable risks of investment activities, questions arise as to how Danantara implements its programs within the framework of the latest State-Owned Enterprises (BUMN) law and what potential corruption risks may emerge. This study employs a normative juridical method using Lawrence M. Friedman’s legal system theory and Syed Hussein Alatas’s theory of corruption to analyze Danantara’s supervisory structure and legal accountability. It further examines the legal protection provisions within Danantara’s framework, the role of individuals involved, and the mechanisms of public accountability. The findings are expected to contribute to the development of a more comprehensive oversight system for state asset management and to reinforce anti-corruption principles in public investment institutions
EVALUATION OF PUMPKIN PEEL POWDER (Cucurbita moschata durch) DIETARY SUPPLEMENTATION ON GROWTH AND COLOR IMPROVEMENT IN LEMON FISH (Labidochromis caeruleus)
Get PDFThis study aimed to determine the supplementation of yellow pumpkin peel powder on the coloration of lemon fish. The powder lemon fish with an average length of 3 cm and a weight of 0.83 g as many as 240 fish. This study used a completely randomized design (CRD) consisting of four treatments and four replicates, namely P1 (0 g/100 g feed), P2 (5 g/100 g feed), P3 (10 g/100 g feed), and P4 (15 g/100 g feed). The aquariums used were 50x30x30 cm in size, with 16 aquariums and 15 fish per aquarium. The fish were reared for 30 days and fed based on fish biomass. The parameters observed were growth performance (absolute weight, absolute length, and survival), water quality, feed nutrient levels, and increased color intensity. Data on growth performance and increased color intensity were analyzed using a one-way analysis of variance (one-way ANOVA) to determine the real difference between each treatment and followed by the Duncan multiple distance test (DMRT) with a 95% confidence interval (p<0.05). Water quality data and feed nutrient levels were analyzed descriptively. The results of the study showed that dietary supplementation with yellow pumpkin peel powder did not affect the growth performance of lemon fish, but it did affect the coloration of lemon fish. The best treatment for increasing the color of lemon fish was P4, with a color increase value of 31.5%
Pengaruh Putaran Mesin Bubut Terhadap Kekasaran Permukaan Material Komposit Serat Rami
Get PDFPenelitian ini bertujuan untuk menganalisis pengaruh variasi putaran mesin bubut terhadap kekasaran permukaan material komposit berbasis serat rami. Komposit dibuat dengan metode cetak menggunakan pipa PVC berdiameter 1 inci dan panjang 15 cm, dengan perbandingan volume antara serat dan resin yang telah ditentukan. Proses pembubutan dilakukan pada tiga variasi putaran spindel, yaitu 120 rpm, 660 rpm, dan 1100 rpm. Hasil pengukuran kekasaran permukaan menunjukkan bahwa peningkatan putaran spindel menyebabkan nilai kekasaran meningkat secara signifikan. Kekasaran permukaan terendah sebesar 19,22 µm diperoleh pada putaran 120 rpm, sedangkan nilai kekasaran tertinggi sebesar 37,73 µm terjadi pada putaran 1100 rpm. Hal ini mengindikasikan bahwa kecepatan putar tinggi meningkatkan gaya potong dan suhu kontak, yang dapat merusak struktur permukaan komposit. Dengan demikian, pemilihan parameter pemesinan yang tepat sangat diperlukan untuk menjaga kualitas permukaan komposit serat rami. Penelitian ini memberikan kontribusi terhadap optimasi proses pemesinan material komposit berbasis serat alam untuk aplikasi teknik dan industri ringan. Kata kunci— komposit serat rami, kekasaran permukaan, putaran mesin bubut, permesinan komposit
Kajian Efisiensi Inkubator Untuk Penetasan Telur Puyuh
Get PDFInkubator merupakan salah satu penerapan secara tidak langsung energy panas untuk menetaskan telur puyuh sebagai pengganti induknya, daya tetas induk alami mencapai 90% sedangkan daya tetas dengan incubator mencapai 70% sampai dengan 80%. Dari pengamatan dan analisa hasil pengujian, variasi bola lampu dan daya yang digunakan sangat mmpengaruhi temperature ruangan incubator. Pengujian menggunakan empat lampu dengan daya 160 watt, enam lampu dengan daya 130 watt, dua lampu dengan daya 120 watt, empat lampu dengan daya 100 watt dan menggunakan menggunakan delapan lampu dengan daya 80 watt kurang efisien karena temparatur yang dihasilkan berkisar antara 40 0C sampai dengan 41,5 0C, kemudian pada pengujian menggunakan enam lampu dengan daya 90 watt temperature yang dihasilkan sangat seragam berkisar antara 39 0C sampai dengan 40 0C sehingga sudah sangat efisien unuk dilakukan pengujian penetasan. Berdasarkan hasil perhitungan, inkubator kecil dengan asumsi daya 60 watt yang digunakan selama 20 hari untuk menetaskan 78 butir telur puyuh membutuhkan energi total sekitar 28,8 kWh, atau 0,37 kWh per butir telur.Tingkat daya tetas yang diperoleh sebesar 78%, masih di bawah penetasan alami (±90%), namun sudah sesuai dengan kisaran inkubator skala rumah tangga (70–80%). Hal ini menunjukkan bahwa sistem inkubator sudah cukup baik, tetapi masih perlu peningkatan efisiensi dan pengaturan suhu agar hasil penetasan lebih optimal
ANALISA PENGUJIAN MEKANIK TERHADAP VARIASI PENGGUNAAN BENTONITE DALAM PENGECORAN PINTU RUANG BAKAR: STUDI EKSPERIMEN DI PT. XYZ
Get PDFThe Combustion chamber door is a component of the boiler that functions to open and close the combustion chamber. At PT. XYZ, the combustion chamber door is made through the melting and metal casting method. In the metal casting method using a sand mold, an auxiliary substance in the form of bentonite is needed which functions to glue the sand mold and strengthen the mold so that it is not easily destroyed when receiving heat from the molten metal lava. The bentonite variations used in this study are 8%, 10%, and 12%. Mechanical testing (impact and hardness) is the most effective test to determine the description of the mechanical properties of a material. The purpose of this study is to determine the magnitude of the impact strength of the metal casting results in the manufacture of combustion chamber doors with different bentonite variations impact testing with the Charpy Impact Test method and the hardness value of the metal casting results in the manufacture of combustion chamber doors with different bentonite variations through hardness testing with the Rockwell Hardness Test method. In the impact test, the results of the impact strength analysis of the 8% bentonite variation were 0.1655 Kg.m/mm2, the 10% bentonite variation was 0.2119 Kg.m/mm2, and the 12% bentonite variation was 0.2555 Kg.m/mm2. In the hardness test, the results of the hardness analysis on the 8% bentonite variation were 104,7 HRC, the 10% bentonite variation was 92,1 HRC, and the 12% bentonite variation was 81,8 HRC