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PENGGUNAAN DINNER PLATE YANG ANTROPOMETRIS PADA AMERICAN SERVICE MENINGKATKAN KINERJA PELAYANAN MAHASISWA PRAKTEK DI RESTORAN SEKOLAH TINGGI PARIWISATA NUSA DUA BALI Budiani, Ni Putu Ariesta; Adiputra, Nyoman; Surata, I Wayan
Jurnal Ergonomi Indonesia (The Indonesian Journal of Ergonomic) Vol 2 No 1 (2016): Volume 2 No 1 Juni 2016
Publisher : Program Studi Magister Ergonomi Fisiologi Kerja Pascasarjana Universitas Udayana Denpasar Bekerjasama dengan Perhimpunan Ergonomi Indonesia (PEI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (170.842 KB) | DOI: 10.24843/JEI.2016.v02.i01.p05

Abstract

American-style service (American Service) priority to speed and accuracy amongwaitress while did the ministry. Therefore a waitress required to be able to carry a maximum of four plates at a time when doing service. The application of inappropriate tableware may associate with musculoskeletal complaints and fatigue, and affect the service performance in the restaurant. It is necessary for the application of ergonomic aspect especially appropriate equipment.This research was using an experimental study with the pre and post test control group design. This study involved fourth semester students, Restaurant Management Third Diploma of Nusa Dua Bali Tourism Institute as a subject as many as 36 people. The result showed significantly difference between control and treatment groups. In the treatment group  had  decreased  subjective  complaints  that include  musculoskeletal disorders about 38.7 % and general fatigue about 42.9 %. The length of presentation time decline 36.86%, while the quality of the presentation increased 65.01%. The decrease insubjective complaints occurred because the application of anthropometric dinner plate thatlighter 410 grams and has a shorter diameter 4.2 cm than previous plate. It is more convenient to carry even four at the time when presents to the guests. This is also showed an increase inservice performance. It can be concluded that the ergonomics  application  of using  appropriate anthropometric equipment in the American Service can improve the service performance among practice students in restaurant.
Perbaikan Kondisi Kerja Serta Pemberian McKenzie exercise Dan Peregangan Statis Memperbaiki Respon Fisiologis Dan Meningkatkan Produktivitas Pekerja Pada Industri Pembuatan Dupa Di UD. Manik Galih Tabanan Sari, Ni Luh Made Reny Wahyu; Adiputra, Luh Made Indah Sri Handari; Muliarta, I Made; Adiputra, Nyoman; Surata, I Wayan; Swamardika, Ida Bagus Alit
Jurnal Ergonomi Indonesia (The Indonesian Journal of Ergonomic) Vol 5 No 1 (2019): Volume 5 No 1 Juni 2019
Publisher : Program Studi Magister Ergonomi Fisiologi Kerja Pascasarjana Universitas Udayana Denpasar Bekerjasama dengan Perhimpunan Ergonomi Indonesia (PEI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (210.085 KB) | DOI: 10.24843/JEI.2019.v05.i01.p01

Abstract

The workers who work at incense shaping department using a chair without backrest. The container is placed below cause the worker to take it with a bent position. The table to put incense is too short, so that when held incense on the incense pads the position of workers tends to bend. These conditions cause the musculoskeletal complaints, fatigue, and increase the workload. The purpose of the study was to analyze an improved working conditions and combination of static stretching and McKenzie exercise to improve physiological response in the form of decreased musculoskeletal complaints, fatigue, and increase worker productivity. Research has been done on 10 workers working in the incense shaping department. The study was conducted in March 2018 - April 2018 held at UD. Manik Galih Tabanan. Physiology response was assessed using Nordic Body Map questionnaire 30 Items of Rating Scale. Intervention was applied in working station using chair with backrest, static exercise and McKenzie exercise. The different between Period 1 and Periode 2 were analized. The resultshowed that mean fatigue (post) at Period 1 was 55±1.49 and Period 2 was 36,8 ± 2,89, so decrease 41,48% significantly (p<0.05). The mean of musculoskeletal complaints after work in Period 1 was 73.6±4.46 and Period 2 was 43±4.53, decrease about 41.57% significantly (p<0.05). The productivity average of period 1 was 0.119 ±0.038 and period 2 was 0.198±0,055 an increase of 35.80% (p<0.05). It cloncluded that improving working condition and combination of static stretching and McKenzie exercise can decrease physiological response and increase work productivity for workers in incense shaping department at UD. Manik Galih Tabanan.
Potensi bambu swat (gigantochloa verticillata) sebagai material karbon aktif untuk adsorbed natural gas (ANG) Putra Negara, Dewa Ngakan Ketut; Tirta Nindhia, Tjokorda Gde; Surata, I Wayan; Sucipta, Made
Jurnal Energi Dan Manufaktur Vol 9 No 2 (2016): Oktober 2016
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak:Bambu merupakan material biomassa yang banyak diteliti, diproduksi sebagai karbon aktif dan diaplikasikan di berbagaibidang kehidupan. Namun sangat sedikit bahkan hampir tidak ditemukan referensi yang membahas kegunaan karbonaktif dari bambusebagai adsorbent untuk Adsorbed Natural Gas (ANG). Penelitian ini difokuskan untukmengkarakterisasai dan menevaluasi potensi bambu swat (Gigantochloa verticillata) sebagai material dasar karbon aktifuntuk aplikasi ANG. Pengujian yang dilakukan meliputi uji proximate, uji ultimate, uji komposisi kimia dan pengamatanstruktur mikro. Hasil penelitian menunjukkan bahwa bambuswat memiliki kandungan lignin 22,9920%, selulosa44,2247%, volatile 88’32%, carbon 43,42%,ash 1,83%, silica (1,8664%) dan nitrogen 1,7065%. Bambu swat memilikiikatan pembuluh yang terdiri atas satu ikatan pembuluh (xilem dan floem) dan dua ikatan serat yang terletak di sebelahdalam dan luar dari ikatan pembuluh.Secara umum dapat dikatakan bahwa bamboo jenis ini memiliki kandungansellulosa, volatile dan karbon yang cukup tinggi serta ash, silica, hydrogen dan nitrogen yang rendah sehinggabambuswat sangat berpotensi digunakan sebagai material sumber karbon aktif.Kata kunci: Karbon aktif, bambu swat, ANG, lignin, sellulosa, analisa ultimate dan proximatesAbstract:Bamboo is a biomass material widely researched, produced as activated carbon and applied in various life fields.However, very little or almost no references were found with regard to utilization of bamboo activated carbon asadsorbent for Adsorbed Natural Gas (ANG). This study is concerned to characterize and evaluate potency of bambooswat (Gigantochloa verticillata) as aprecursor of activated carbon for ANG application. Examinations conducted wereproximate, ultimate, chemical composisition tests and microstructure observation. The results showed that bambooswathave a lignin content 22.9920%, cellulose 44.2247%, volatile 88.32%, carbon 43.42%, ash 1.83%, silica 1.8664% andnitrogen 1.7065%. The type of bamboo swat vascular bundles consist of a single bond vessels (xylem and phloem) andtwo ligament fibers are located on the inside and outside of the vascular bundles.Generally, it can be said this type ofbamboo has high contents of cellulose, volatile and carbon and low contens of ash, silica and nitrogen so that it hasgreat potential as a source of activated carbon..Keywords: Activated carbon, bamboo swat, ANG, lignin, cellulosa, ultimate and proximate analysis
Pemurnian Biogas Dari Gas Pengotor Hidrogen Sulfida (H2S) Dengan Memanfaatkan Limbah Geram Besi Proses Pembubutan Trisna Negara, Komang Metty; Tirta Nindhia, Tjokorda Gde; Sucipta, I Made; Atmika, I Ketut Adi; Putra Negara, Dewa Ngakan Ketut; Surata, I Wayan; Komaladewi, A.A.I.A. Sri
Jurnal Energi Dan Manufaktur Vol 5 No 1 (2012): Oktober 2012
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

This research is intended to utilize waste steel chips from the process of turning (process in which lathemachine is used) for purification of biogas from the gas of hydrogen sulfide (H2S) contaminant to supportthe promotion of zero waste industrial and manufacturing process in the world. The waste of Iron chips iscollected and selected. Only long and spiral like of iron chips that are useful for this purpose. Since thechips having residual stress due to strain hardening during turning process, then the annealing processshould be done before compacting to form a billet.The thickness of the billet was 1 cm and 6 cm indiameter with weight 500 gram. The annealing proces was carried out by burning the iron chip until reachthe red color of fire. During the annealing process the iron inside the steel will react with oxygen to formiron oxide (Fe2O3) and if during oxidation there is a water vapor in the air then the iron bog ore Fe(OH)3 willbe formed. Both of Fe2O3 and Fe(OH)3 are very reactive to H2S and therefore able to eliminate the H2Scontaminant inside the Biogas. The billet is used as a filter and to be installed in the line of biogasdistribution. The result indicate that the the iron chips is potential to be utilized to reduce the H2Scontaminant in the biogas
Studi sifat mekanis komposit epoxy berpenguat serat sisal orientasi acak yang dicetak dengan teknik hand-lay up Surata, I Wayan; Lokantara, I Putu; Putra Arimbawa, Ade
Jurnal Energi Dan Manufaktur Vol 9 No 2 (2016): Oktober 2016
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak:Tanaman sisal tumbuh liar di daerah kering berbatuan seperti di pulau Nusa Penida kabupaten Klungkung, yang oleh penduduklokal disebut tanaman bagu. Serat sisal sangat kuat oleh karena itu dahulu banyak digunakan sebagai tali-temali penambatjukung atau perahu, sebelum dikenalnya tali nilon seperti saat ini. Belakangan ini serat alam termasuk sisal banyakdikembangkan sebagai penyusun komposit. Komposit serat sisal dapat dibudidayakan dengan mudah dan murah sehinggaketersediaannya bisa berkelanjutan, serta ramah terhadap lingkungan. Kekuatan mekanis komposit yang diperkuat denganserat alam dapat ditingkatkan dengan mengatur perbandingan fraksi volume serat di dalam komposit tersebut. Tujuanpenelitian ini adalah menyelidiki pengaruh fraksi volume serat terhadap sifat tarik dan lentur komposit berpenguat serat sisaldengan matriks epoxy. Serat sisal diperoleh dengan cara ekstraksi yaitu perendaman dan penyisiran, kemudian dipotongdengan ukuran panjang 3 cm. Serat sisal mengalami perlakuan dalam larutan alkali 5% NaOH selama 2 jam. Matriks yangdigunakan adalah epoxy resin, dengan hardener versamid. Komposit dibuat dengan teknik press hand lay-up, dengan variasifraksi volume serat sisal 15%, 20%, dan 25% yang disusun secara acak. Komposit hasil cetakan mengalami post curing padasuhu 65 oC selama 2 jam. Spesimen uji tarik dibuat berdasarkan standar ASTM D3039, dan uji lentur mengacu pada standarASTM D790M. Pengujian tarik dilakukan dengan mesin uji tarik universal, dan pengujian lentur dengan metode tiga titikpembebanan. Hasil penelitian menunjukkan bahwa kekuatan tarik dan modulus elastisitas tarik komposit meningkat seiringdengan meningkatnya fraksi volume serat, dan nilai optimum terjadi pada fraksi volume serat 25%, yaitu 19,77 MPa untukkekuatan tarik, dan 2,83 GPa untuk modulus elastisitas, sementara regangan tarik optimum terjadi pada fraksi volume serat15%, yaitu sebesar 1,01%. Kekuatan lentur dan modulus lentur serta regangan lentur juga meningkat seiring denganmeningkatnya fraksi volume serat, dan nilai optimum dicapai pada komposit dengan fraksi volume serat 25%, yaitu 88,48 MPa,untuk kekuatan lentur, dan 0,259 GPa untuk modulus elastisitas lentur, serta regangan lentur sebesar 7,55%.Kata kunci: Serat sisal, komposit epoxy, fraksi volume, kekuatan tarik, kekuatan lenturAbstract:The sisal plant (Agave sisalana) grows wild in arid areas such as the rocky island of Nusa Penida in Klungkung regency, andlocal people call bagu plants. Sisal fiber is very strong that is why it widely used as rigging on boats or ships, before they knownylon rope. Currently, natural fibers including sisal has been developed as elements to produce composites. Sisal fibers can becultivated easily and inexpensively so that availability will be sustainable and environmentally friendly. Mechanical strength ofcomposites that reinforced with natural fibers can be improved by setting the ratio of fibers volume fraction in the composite.The aim of this study was to investigate the effect of fiber volume fraction on tensile and flexural properties of composite withsisal fiber and epoxy matrix. Sisal fibers obtained with extraction process by soaking and combing, then cut to a length of 3 cm.Sisal fibers undergo treatment in an alkaline solution of 5% NaOH for 2 hours. The matrix used is epoxy resin, with a hardenerversamid. Composites was made by hand lay-up technique, with a variation of fibers volume fraction of 15%, 20%, and 25%which were arranged randomly. Composite underwent post curing at a temperature of 65 ° C for 2 hours. Tensile testspecimens were made based on the standard ASTM D3039, and the flexural test based on ASTM standards D790M. Tensiletest was conducted by using universal tensile testing machine, and flexural test with a three-point loading method. The resultsshowed that the tensile strength and tensile modulus of elasticity of the composite increases with increasing fibers volumefraction, and the optimum value occured in the fibers volume fraction of 25%, the highest value of 19.77 MPa for tensilestrength, and 2.83 GPa for the modulus of elasticity, while the strain optimum occured on the fibers volume fraction of 15%, withvalue 1.01%. Flexural strength, flexural modulus and flexural strain also increases with increasing fiber volume fraction, and theoptimum value was achieved in the composite with a fiber volume fraction of 25%, with value of 88.48 MPa for flexural strength,flexural modulus of 0.259 GPa and flexural strain of 7.55%.Keywords: Sisal fiber, epoxy composites, volume fraction, tensile strength, flexural strength
CHANGING BODY POSTURE AND WORKING SYSTEM IMPROVES WOKERS PERFORMANCE AND PRODUCT QUALITY Surata, I Wayan; Manuaba, A.; Adiputra, N.; Sutjana, D.P.
INDONESIAN JOURNAL OF BIOMEDICAL SCIENCES Vol. 5, No. 1 Januari 2011
Publisher : Udayana University

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Abstract

Seaweed is one of the nation’s potential marine commodities that maycontribute to the national revenue and a new source of income for the localcommunity, as the cultivation of seaweed is much easier and cheaper than paddycrop, because neither pesticides nor fertilizer would be required. Other advantages ofcultivating seaweed are the fact that it can be carried out throughout the year, and itsrelatively shorter duration to reach the harvesting time. Local practice of drying theseaweed is by spreading it over a plastic sheet on the ground and exposing it to thesun. Unfortunately, such traditional practice of drying seaweed has led to increasedrisk of contamination of seaweed by dust and sand particles and other impurities.The quality of seaweed is influenced by the type of seedlings, harvesting age, andthe crucial process of drying. The local traditional working posture during drying issquatting and stooping to flatten and spread evenly the seaweed. Our preliminarystudy has shown that the farmers have had considerable musculoskeletal complaintsand fatigue with the seaweed quality being still relatively low.This study was conducted to examine the effects of changing the workers’working posture and limiting lift weight at 23 kg and introduced a 5-minute breakafter an-hour work with the aim to improve both workers’ performance and seaweedquality and productivity. This is an experimental study using a two-period crossoverdesign on 20 farmers of seaweed cultivation in the Ped Village of Nusa Penida.The results of our study showed that redesigning and changing the workers’working posture and working system improved the performance of seaweed farmersas revealed by the decrease of musculoskeletal complaints to 56.15% (p < 0.05); bydecrease in general fatigue to 50.84% (p < 0.05); by the increase in productivity to37.93% (p < 0.05), and by the increase in income to 41.62% (p < 0.05). The qualityof the dried seaweed was also improved as could be seen from the decrease in watercontent to 29.24% (p < 0.05) and decrease in impurities to 33.33% (p < 0.05).From our data it could be inferred that changing the workers’ working bodyposture and working system significantly improved both their performance and thequality of their product.
Teknik Squat dan Stoop Menggunakan Electromyography pada Pekerjaan Manual Materials Handling Surata, I Wayan
Jurnal Teknik Industri Vol 15, No 1 (2013): JUNE 2013
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (231.371 KB) | DOI: 10.9744/jti.15.1.33-38

Abstract

Manual materials handling has been identified as the most common cause of work-related musculoskeletal disorders. Among the manual material handling activities, lifting has long been regarded as an activity associated with a high risk of low-back pain. Lifting studies have mainly focused on the squat and stoop lifting techniques as an effort to improve the protection of workers from low back discomfort. However, neither is ideal and the benefits of one technique over another have proved inconclusive. The purpose of this study was to examine and compare the squat and stoop lifting techniques through analysis of muscles activation by using electromyography. Six volunteers participated in the study, and were required to lift a weight with squat and stoop techniques, with two types of loading at 1,7 kg and 6,7 kg. Observations were made on the rectus femoris, biceps femoris, and multifidus muscles. The results of study showed that the squat technique had higher levels of muscle activation compared to stoop technique on rectus femoris muscle. On the contrary, squat technique had lower muscle activation compared to stoop technique on biceps fermoris muscle. Meanwhile, both techniques squat and stoop had the same level of muscle activation on multifidus muscle. Conclusion, squat and stoop lifting techniques had the same opportunities to use.
Pelapisan perunggu dengan krom untuk meningkatkan kekerasan permukaan Surata, I Wayan
Jurnal Energi Dan Manufaktur Vol 1, No 1 Juni 2006
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Alloys containing principally copper and tin are considered as bronzes. These materials possess desirable properties of strength, wear resistance, and salt water corrosion. Bronzes materials are widely used such as for gears, bearings and other machine parts. These component parts work with relative movement, pressure, and friction on the contact surfaces, for long time will cause surface wear. To improve wear resistance and hardness of the contact surfaces, it needed to be plating by an electroplating method. This study is to find out the influence of plating thickness to the hardness on electroplating bronzes by chromium. The specimen is hollow cylindrical form of bronze with inner diameter 10 mm, outer diameter 30 mm and height 10 mm. Treatment variables are plating time, with variation of 30, 50, 70, 90, and 110 minutes. The dependent variable in this study is surface hardness. Specimens are made 3 items for each observation, so the total specimens are 15 items. The electrolyte used in this study is mixed of CrO3 (250 g/L), and H2SO4 (2.5 g/L), meanwhile electric current 50 Amperes and voltage 6 volts keep constantly during the process. The result can be concluded that there is a positive linear correlation between plating time with plating thickness, and plating thickness with surface hardness.
PENGEMBANGAN OBJEK WISATA PANTAI KLINGKING DESA BUNGA MEKAR, KECAMATAN NUSA PENIDA, KABUPATEN KLUNGKUNG Surata, I Wayan; Nindhia, Tjokorda GdeTirta; Nindhia, Tjokorda Sari
Buletin Udayana Mengabdi Vol 17 No 3 (2018): Buletin Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (776.33 KB) | DOI: 10.24843/BUM.2018.v17.i03.p27

Abstract

Hardness Characteristics of Hybrid Composite Brake Lining on Olie's Absorption Media Adi Atmika, I Ketut; Ary Subagia, IDG.; Surata, I Wayan; Sutantra, I Nyoman
International Journal of Engineering and Emerging Technology Vol 4 No 1 (2019): January - June
Publisher : Doctorate Program of Engineering Science, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ijeet.2019.v04.i01.p15

Abstract

Brake lining technology is developing rapidly to adjust the absorption media in which the vehicle's braking system is operating. Material commonly used as a brake lining is asbestos and its alloys, but this material is very dangerous to the environment and health. This research was developed to overcome these problems, namely finding alternative brake lining pads material that has good mechanical and physical properties. Brake lining material is made from a hybrid composite reinforced basalt, shellfish, alumina, and phenolic resin (PR-51510i) as a binding matrix. This brake lining material is produced through a process of sintering at a temperature of 150 ? C with a load of  2000 kg for 30 minutes. These hybrid composites are made in as many as three variations, each of which is tested for olie absorption at several variations of immersion time. Immersion 3 days hardness of hybrid composite and asbestos brake lining material is still quite high between 24-28 HVN. The highest hardness at that time was an H1 specimen of 28.00 HVN. Then the hardness of the brake lining material decreases with the addition of immersion time and is close to stable at the