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Penggunaan Pencekam Tiga Aksis untuk Alat Bantu Pengelasan Rangka Furnitur Himarosa, Rela Adi; Darmawan, Muhammad Arif; Nur Rahman, Muhammad Budi
JMPM (Jurnal Material dan Proses Manufaktur) Vol 4, No 1 (2020): JUNI 2020
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v4i1.9328

Distorsi logam terjadi akibat kontraksi logam yang terpapar suhu tinggi sehingga menimbulkan tarikan atau dorongan pada benda kerja. Alat bantu berupa pencekam banyak digunakan pada proses pengelasan untuk mencegah distorsi pada logam. Pencekam tiga aksis mampu melakukan proses pencekaman ketiga aksis sekaligus. Proses penggunaan pencekam jenis ini sangat bermanfaat untuk proses pengelasan rangka furnitur. Pencekam ini digunakan untuk meningkatkan efisiensi produksi rangka kursi. Penelitian ini untuk mengkaji pemanfaatan pencekam tiga sumbu untuk menahan fenomena distorsi akibat kenaikan suhu proses pengelasan, dan peningkatan produktifitas waktu proses penyambungan dengan variasi arus pengelasan 50 Ampere dan 60 Ampere. Kinerja pencekam mampu mempercepat waktu proses 19% dan menekan biaya pembuatan produk rangka sebesar 43,74%.Â Metal distortion occurs due to contractions of metal exposed to high temperatures that cause pulling or pushing on the work piece. Three-axis fixtures are widely used in welding process to minimize metal distortion. Three-axis fixture is capable of holding the three axis simultaneously, so it is very useful for the welding furniture frames, and can improve the efficiency of chair frame production. This study is to examine the use of three-axis fixture to withstand the phenomenon of distortion due to the increase in temperature of welding process at welding current of 50 Amperes and 60 Amperes, and decrease production time of the joining process. The fixture performance was able to speed up processing time by 19% and reduced the cost of frame production by 43.74%.Â

Penggunaan Pencekam Tiga Aksis untuk Alat Bantu Pengelasan Rangka Furnitur Himarosa, Rela Adi; Darmawan, Muhammad Arif; Nur Rahman, Muhammad Budi
JMPM (Jurnal Material dan Proses Manufaktur) Vol 4, No 1 (2020): JUNI 2020
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v4i1.9328

Distorsi logam terjadi akibat kontraksi logam yang terpapar suhu tinggi sehingga menimbulkan tarikan atau dorongan pada benda kerja. Alat bantu berupa pencekam banyak digunakan pada proses pengelasan untuk mencegah distorsi pada logam. Pencekam tiga aksis mampu melakukan proses pencekaman ketiga aksis sekaligus. Proses penggunaan pencekam jenis ini sangat bermanfaat untuk proses pengelasan rangka furnitur. Pencekam ini digunakan untuk meningkatkan efisiensi produksi rangka kursi. Penelitian ini untuk mengkaji pemanfaatan pencekam tiga sumbu untuk menahan fenomena distorsi akibat kenaikan suhu proses pengelasan, dan peningkatan produktifitas waktu proses penyambungan dengan variasi arus pengelasan 50 Ampere dan 60 Ampere. Kinerja pencekam mampu mempercepat waktu proses 19% dan menekan biaya pembuatan produk rangka sebesar 43,74%.Â Metal distortion occurs due to contractions of metal exposed to high temperatures that cause pulling or pushing on the work piece. Three-axis fixtures are widely used in welding process to minimize metal distortion. Three-axis fixture is capable of holding the three axis simultaneously, so it is very useful for the welding furniture frames, and can improve the efficiency of chair frame production. This study is to examine the use of three-axis fixture to withstand the phenomenon of distortion due to the increase in temperature of welding process at welding current of 50 Amperes and 60 Amperes, and decrease production time of the joining process. The fixture performance was able to speed up processing time by 19% and reduced the cost of frame production by 43.74%.Â

A PRODUCTION PLANNING OF MIXED CHAMPIGNON PRODUCT TO OPTIMIZE PROFIT GAINED BY PT X Muhammad Arif Darmawan; Karsi Widiawati
Jurnal Teknologi Industri Pertanian Vol. 30 No. 3 (2020): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2020.30.3.281

PT X adalah perusahaan di bidang agroindustri khususnya pada komoditas jamur kancing. Jamur kancing memiliki umur simpan yang pendek sehingga harus segera dijual ke konsumen atau diproses menjadi produk olahan. Jumlah permintaan jamur tidak pasti, menyebabkan terjadinya kelebihan atau kekurangan produksi baik pada produk segar maupun olahan. Oleh karena itu, perlu untuk menghitung rencana kombinasi produk yang dapat memenuhi tujuan yang diinginkan dan mendapatkan solusi yang memuaskan. Penelitian ini menggunakan metode goal programming dalam perencanaan produk kombinasi. Penelitian ini juga menggunakan permintaan produk dan ketersediaan bahan baku dari Januari 2017 hingga Desember 2019. Selain itu, data kebutuhan bahan baku, jam tenaga kerja, biaya produksi, dan harga setiap produk juga digunakan. Data historis terkait jumlah permintaan dan ketersediaan bahan baku digunakan untuk meramalkan jumlah permintaan dan ketersediaan bahan baku pada periode perencanaan menggunakan model ARIMA. Penentuan tingkat prioritas yang digunakan dalam pemodelan goal programming pada penelitian ini menggunakan pairwise comparison. Berdasarkan hasil perencanaan yang telah dibuat untuk bulan Januari 2020, total jumlah produksi fresh champignon yaitu 22.584 kg, produk 250 mL whole champignon sebanyak 4.499 unit, produk 900 mL whole champignon sebanyak 2.571 unit, produk 250 mL sliced champignon sebanyak 4.567 unit, produk 900 mL sliced champignon sebanyak 32.306 unit, dan produk canned champignon sebanyak 85 unit. Model peramalan yang digunakan dalam penelitian ini representatif berdasarkan verifikasi yang telah dilakukan. Kata kunci: jamur kancing, goal programming, perencanaan produksi, ARIMA

Peningkatan Produktivitas Proses Budidaya Karet Alam dengan Pendekatan Green Productivity: Studi Kasus Di PT. XYZ Marimin Marimin; Muhammad Arif Darmawan; Machfud Machfud; Muhammad Panji Islam Fajar Putra
agriTECH Vol 33, No 4 (2013)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Indonesia is the second largest natural rubber producer in the world with 28% of the total world production in 2010. In line with the growth of the world’s automotive industry, the needs of natural rubber as a complementary synthetic rubber products will also increase. The main objective of this research was to find the best alternative strategy to increase the productivity of the natural rubber plantations through the green productivity (GP) approach. The case study was conducted at PT. XYZ, a private company which runs the plantation and processing of natural rubber businesses. The material flow analysis was performed to identify the seven green wastes. The best alternative strategy was determined by using the analytical Hierarchy Process (AHP) model developed into several improvement scenarios. The measurement of the alternative strategy performance was rated as the future Green Productivity Index (GPI) and compared with the value of current GPI, which had been calculated in the PT. XYZ, as the case study. The results of this research was able to provide the best productivity improvement strategy, the level of company’s productivity which has been achieved, and the productivity levels of the implementation of the strategy chosen.ABSTRAKIndonesia merupakan negara kedua penghasil karet alam terbesar di dunia dengan produksi sebesar 28% dari total produksi dunia di tahun 2010. Sejalan dengan bertumbuhnya industri otomotif dunia, kebutuhan karet alam sebagai produk komplementer karet sintetik akan turut mengalami peningkatan. Tujuan utama penelitian ini adalah untuk merumuskan alternatif strategi terbaik pada peningkatan produktivitas proses budidaya karet alam melalui pendekatan konsep Green Productivity (GP). Studi kasus dilakukan di PT. XYZ, perusahaan swasta yang bergerak dibidang usaha perkebunan dan pengolahan karet alam. analisis aliran material dilakukan dengan menggunakan peta aliran material hijau untuk menganalisa tujuh jenis sumber pembangkit limbah hijau (seven green wastes). Alternatif strategi terbaik ditentukan dengan menggunakan model Analytical Hierarchy Process (aHP) yang kemudian dikembangkan menjadi beberapa rancangan skenario perbaikan. Pengukuran kinerja alternatif strategi ini selanjutnya dinilai sebagai indeks produktivitas hijau (GPI) perbaikan (future) dan dibandingkan dengan nilai indeks GPI saat ini (current), yang telah dihitung pada studi kasus yang dilakukan. Hasil penelitian ini mampu memberikan informasi strategi peningkatan produktivitas terbaik, tingkat produktivitas yang telah dicapai perusahaan, dan tingkat produktivitas hasil penerapan strategi terpilih.

THE EFFECT OF DIETARY VITAMIN E AND ZINC LEVELS ON PERFORMANCE AND LIPID OXIDATION IN FRESH AND STORED EGGS OF LAYING DUCKS Arif Darmawan; Sumiati Sumiati; Widya Hermana
Buletin Peternakan Vol 41, No 2 (2017): BULETIN PETERNAKAN VOL. 41 (2) MEI 2017
Publisher : Faculty of Animal Science, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21059/buletinpeternak.v41i2.15675

Vitamin E and zinc are necessary for preventing free radical damage to phospholipid membranes, enzymes and other important molecules. The objective of this study was to evaluate the effect of dietary vitamin E and zinc levels on performance and lipid oxidation in fresh and stored eggs of laying duck. A total of 90 of 22 weeks old ducks were randomly divided into 15 experimental units by assigning a completely randomized design with 5 treatments and 3 replications. The treatment diets were R1 (control diet), R2 (R1+40 IU vitamin E), R3 (R1+80 IU vitamin E), R4 (R1+100 ppm organic zinc), and R5 (R1+200 ppm organic zinc).The experiment was carried out for 8 wk. Parameters observed were feed intake, egg production, egg weight, feed conversion ratio, and Thiobarbituric Acid Reactive Substances (TBARS) value. The results showed that increasing of vitamin E from 40 IU to 80 IU and zinc from 100 ppm to 200 ppm did not affect feed intake and egg weight. Otherwise, the dietary Vitamin E and organic zinc significantly decreased (P<0.05) feed conversion ratio and significantly increased (P<0.05) egg production and decreased (P<0.01) TBARS values. It is concluded that dietary 40 IU vitamin E or 100 ppm organic zinc could increase the performance of laying ducks and dietary 200 ppm organic zinc was more efective to be antioxidant than 40 and 80 IU vitamin E.

Penggunaan Dandelion (Taraxacum officinale) dalam Pakan Terhadap Performa Kalkun (Meleagris gallopavo): Utilization of Dandelion (Taraxacum officinale) in the Diet on Turkey (Meleagris gallopavo) Performance H D S Tadjudin; M Shofiah Shofiah; S Aini Aini; widya hermana; Arif Darmawan
Jurnal Ilmu Nutrisi dan Teknologi Pakan Vol. 18 No. 1 (2020): Jurnal Ilmu Nutrisi dan Teknologi Pakan
Publisher : Departemen Ilmu Nutrisi dan Teknologi Pakan Fakultas Peternakan Institut Pertanian Bogor

The aim of this study was to evaluate fresh dandelion leaves on turkey performance. The study used a complete randomized design of 4 treatments and 6 replications. A total number of 24 turkeys (Meleagris gallapavo)-12 week-old were used in this 5 weeks of feed trial. The experimental animals were fed with the diet containing 37% of commercial broiler starter diet, 40% rice bran and forage (water hyacinth and fresh dandelion leaves). The treatments with fresh dandelion leaves addition were P0: 0%, P1: 5%, P2: 10%, and P3: 15%. The variables observed were bio active compound in dandelion leaves, daily behavior and turkey performance. Data were analyzed by Analysis of Variance (ANOVA) and the significant differences between treatments were analyzed by Duncan's Multiple Range Test. The results showed that dandelion leaves contain flavonoids, tannins, saponins and steroids, vitamin D were 17.37 ppm and antioxidants IC50 have an antioxidant activity with a value of 102.31. Observation of daily behavior showed that turkeys behavior was dominated by eating and resting activities, where the highest frequency of resting activities was 0.43 per second (P0). Turkey performance were not significantly different on feed consumption, carcass weight, carcass percentage for all treatments but significantly different (p<0.05) on average daily gain (AVG) and feed conversion ratio. Therefore it can be concluded that fresh dendelion leaves are able to used up to 15% in turkey diet. Key words: antioxidant, dandelion, turkey performance, vitamin D DAFTAR PUSTAKA Azhari NT & Apliriana E. 2016. Peranan jombang (Taraxacum officinale) sebagai hepatoprotektor. Jurnal Majority. 5(5): 32-36. Astuti S. 2008. Isoflavon kedelai dan potensinya sebagai penangkap radikal bebas. Jurnal Teknologi Industri dan Hasil Pertanian. 13(2): 126-136. Adawiah, Sukandar D & Muawanah A. 2015. Aktivitas antioksidan dan kandungan komponen bioaktif sari buah namnam. Jurnal Penelitian dan Pengembangan Ilmu Kimia. 1(2): 130-136. Amin M, Sawhney SS & Jassal MMS. 2013. Qualitative and quantitative analysis of phytochemicals of Taraxacum officinale. Wudpecker Journal of Pharmacy and Pharmocology. 2(1):1-5. Badarinath A, Rao K, Chetty CS, Ramkanth S, Rajan T & Gnanaprakash K. 2010. A review on in vitro antioxidant methods: comparisons, correlations and considerations. International Journal of Pharmatical Technology Research. 2(2): 1276-1285. Cook R, Xin H & Nettleton D. 2005. Effects of cage stocking density of feeding behaviours of groups housed laying hens. Journal Animals Agriculture Biology. 49(1): 187-192. Dheer R & Bhatnager P. 2010. A study of the antidiabetic activity of Barleria prionitis linn. Indian Journal of Phamacology. 42(2): 1-5. Gibril S, Samsel S RM, Yassin OE, Hassan AA & Atta M. 2013. Body gain and carcas charateristics of turkeys (Meleagris gallopavo) under extensive system of management in the student. International Journal of Applied Poultry Research. 2(2): 23-26. Mishra A, Kaone P, Schouten W, Sprujit B & Metz J. 2005. Tempral and sequential structure of behaviour and facility usage of laying hens in an encrihed environment. Poultry Science. 84:979-991. Rizky A, Haryono D & Kasymir. 2016. Analisis usaha dan strategi pengembangan ternak kalkun mitra alam kabupaten pringsewu provinsi Lampung. Jurnal Ilmu Ilmu Agribisnis. 4(3): 235-242. Ramian F & Indrianti MA. 2018. Analisa potensi eceng gondok (Eichornia crassipes) Danau Limboto sebagai pakan ternak. Prosiding Seminar Nasional Integrated Farming System. Gorontalo (ID): Universitas Muhammadiyah Gorontalo. Setiawan B. 2017. Kandungan protein kasar dan serat kasar dedak padi yang difermentasi dengan mikroorganisme lokal [skripsi]. Makassar (ID): Universitas Hasanuddin. Steel RGD & Torrie JH. 1993. Prinsip dan Prosedur Statistika Suatu Pendekatan Biometrik. Sumatri B, penerjemah. Terjemah dari: Principles and Procedures of Statistics. Jakarta (ID): Gramedia Pustaka Utama, Suprijatna E, Sunarti D, Mahfudz L D, Ardiningsasi S M, Inayah A & Purnomo A H S. 2010. Performans produksi dan efisiensi penggunaan protein ransum pada kalkun lokal yang dipelihara secara intensif diberi ransum mengandung daun kobis (Brassica oleracea var capitata) afkir. Seminar Nasional Unggas Lokal. Semarang (ID): Fakultas Peternakan, Universitas Diponegoro. Wulan, Yudistira A, & Rotinsulu H. 2019. Uji aktivitas antioksidan dari ekstrak etanol daun Mimosa pudica Linn. menggunakan metode DPPH. Jurnal Ilmiah Farmasi. 8(1): 106-113.

Evaluasi Pakan Daun Ubi Jalar dan Daun Singkong pada Kualitas Telur Itik yang Disimpan pada Suhu 5°C Tera Fit Rayani; Sumiati Sumiati; Arif Darmawan
Jurnal Ilmu Pertanian Indonesia Vol. 27 No. 4 (2022): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18343/jipi.27.4.488

Egg yolks contain omega-3 and omega-6 fatty acids that are easily oxidized during storage, so they must be protected. The objective of this study was to evaluate the effect of feeding containing sweet potato leaves meal (TDU) and cassava leaves meal (TDS) on the quality of duck eggs stored at 5 °C for 8 weeks. This study used a completely randomized design, 6 ´ 3 factorial design with 4 replications. Factor A was feed treatment (R0 = control feed without TDU or TDS; R1 = feed containing 0% TDU and 10% TDS; R3 = feed containing 5% TDU and 0% TDS; R4 = feed containing 5% TDU and 5% TDS; R5 = f eed containing 5% TDU and 10% TDS). Factor B was egg storage time (0, 4, and 8 weeks). A total of 144 duck eggs were used in this study. The results showed no interaction between the supplementation of TDU and TDS with the storage time on the quality of stored eggs. Supplementation of TDU or TDS or their combination significantly (p<0.05) increased the yolk score and yolk egg weight. Storage time for 4 and 8 weeks significantly (p<0.05) decreased egg weight, shell percentage, egg white percentage and weight, Haugh unit, and egg yolk score, but significantly (p<0.05) increased egg yolk percentage and weight. This study concluded that supplementing 5% sweet potato leaves meal and 10% cassava leaves meal resulted in the highest egg yolk color score. Storage time for 4 weeks can still maintain duck eggs with AA quality. Keywords: cassava leaves, duck eggs quality, storage, sweet potato leaves

STUDI PRA-KELAYAKAN PENDIRIAN INDUSTRI SEDIAAN PEWARNA DAN PENGAROMA DAUN PANDAN DI KOTA TASIKMALAYA Muhammad Arif Darmawan; Khaswar Syamsu; Ardani Lukman
Jurnal Teknologi Industri Pertanian Vol. 33 No. 2 (2023): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2023.33.2.156

Food coloring and flavoring from pandan leaves (Pandanus amaryllifolius) are natural dyes that can be used as an alternate to synthetic dyes. Meanwhile there is a potential to establish factory to support it as well as raw material availability. The purpose of this study was to conduct a pre-feasibility study of establishing a natural pandan preparations industry. The scope of this study includes market and marketing analysis, technical and technological analysis, management and organizational analysis, and financial analysis. The target market is the cake and bread industry, hotels, restaurants, and cafes in West Java. This industry is planned to be established in Tasikmalaya City, West Java with a production capacity around 44 ton/year. The results of the pre-feasibility study are that the industry is feasible with a Net Present Value of Rp 3.358.666.480; an Internal Rate of Return of 27.408%, a Net Benefit Cost Ratio 2.652; and 4.05 years payback period. Furthermore, based in the sensitivity analysis indicated that the decrease in selling price is more sensitive compared to the increase in operating costs and decrease in production capacity, and the increase in operating costs is more sensitive when compared to a decrease in production capacity. A decrease in selling price of 15% or an increase in operating costs of 20% has made the pandan preparation industry not feasible. Keywords: coloring, flavoring, pandan leave, pre-feasibility study

Influence of The Dietary Thermo-Mechanically Fermented Soybean Meal on Chicken Meat Quality of Jawa Super Male Chicken Saputro, Wahyu Subagio; Muhammad Arif Darmawan; Pramita Nindya Saraswati; Aan Andri Yano; Novi Akhirini; Wahyu Setyono; Wara Pratitis Sabar Suprayogi
ANIMAL PRODUCTION Vol. 26 No. 3 (2024)
Publisher : Faculty of Animal Science, Jenderal Soedirman University in associate with the Animal Scientist Society of Indonesia (ISPI) and the Indonesian Association of Nutrition and Feed Science (AINI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jap.2024.26.3.302

The meat quality of Jawa Super Male Chicken is attributed to the diet treatment offered since the rearing period. This study aimed to evaluate the meat quality of Jawa Super Male Chickens fed on diets made of soybean meal (SBM) fermented with Bacillus subtilis or Aspergillus niger. The experimental groups were control group without steam conditioning or fermentation (P0), SBM fermented with Bacillus subtilis or SBM BS (P1), and SBM fermented with Aspergillus niger or SBM ASP (P2). Ninety chickens aged 21 days (210 ± 3.69 grams) were assigned to three groups, and replicated six times with five birds. Basal diets were made of corn-soybean with 16% crude protein (CP) and 2,950 Kcal metabolic energy (ME). The results showed significant differences (P<0.05) in the physical attributes (cooking loss, water holding capacity) and chemical properties (fat content) but the collagen and protein content did not differ significantly (P>0.05). The meat pH was within the normal range of 5.90 – 5.93. Conclusively, SBM fermented with Bacillus subtilisor Aspergillus niger increased meat quality.

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