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PERBAIKAN POSTUR KERJA UNTUK MENGURANGI KELUHAN MUSKULOSKELETAL DENGAN PENDEKATAN METODE OWAS (Studi kasus di UD. Rizki Ragil Jaya – Kota Cilegon) Susihono, Wahyu; Prasetyo, Wahyu
SPEKTRUM INDUSTRI Vol 10, No 1: April 2012
Publisher : SPEKTRUM INDUSTRI

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Abstract

Perbaikan postur kerja penting dilakukan untuk menjaga kenyamanan pekerja dalammelakukan aktifitas kerja. Gangguang pada sistem musculoskeletal seminimal mungkin terjadi.Pada aktifitas proses produksi pembuatan kripik singkong teridentifikasi bahwa postur kerjamemiliki potensi menimbulkan cidera sehingga perlu dilakukan perbaikan metode kerja gunamenurunkan indeks resiko kerja.Metode Ovako Work Posture Analysis System (OWAS) digunakan untuk mengevalusidan menganalisa sikap kerja sehingga diperoleh kategori dan rekomendasi metode kerja yangbaru. Perhitungan indek resiko kerja dilakukan agar dapat mengklasifikasikan kategoripekerjaan yang dilakukan. Perancangan mesin dengan menggunakan data antropometri dandata hasil rekomendasi OWAS.Hasil analisis OWAS menunjukkan bahwa sebelum perbaikan masuk pada kategori 3yang artinya memerlukan perbaikan dengan segera dan 2 yang artinya memerlukan perbaikandimasa mendatang, sedangkan setelah perbaikan diperoleh kategori 1 yang artinya tidak adamasalah pada sistem musculoskeletal. Indeks resiko sebelum perbaikan sebesar 243 satuan,setelah perbaikan menjadi 129 satuan artinya pekerjaan mempunyai resiko yang kecil(minimum risk) Kata Kunci : postur kerja, muskuloskeletal, OWAS
Arti Penting Kreativitas Terhadap Penciptaan Ide Bisnis Studi Kasus pada Mahasiswa FE-UKRIDA, Jakarta Marvianta, YB Andre; Frederica, Diana; Prasetyo, Wahyu
Ilmiah Manajemen Bisnis Vol. 13 No. 1 Mei 2013
Publisher : Ilmiah Manajemen Bisnis

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Abstract

Korelasi Klasifikasi Penutup Lahan dengan Debit Puncak di Daerah Aliran Sungai Sachro, Sri Sangkawati; Edhisono, Sutarto; Atmodjo, Pranoto Samto; Prasetyo, Wahyu
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 23, Nomor 2, DESEMBER 2017
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (798.912 KB) | DOI: 10.14710/mkts.v23i2.16687

Abstract

Many studies have shown that land use changes in watersheds such as forests that convert to settlements, industrial and estates, have an impact on flooding. So it is important to know the correlation between the various land use changes to the discharge within a watershed. This study is a preliminary study in an attempt to assess the correlation between land cover index and peak discharge, with case studies in the Beringin River Basin.The peak discharge with the return period of 2, 5, 10, 20, 50 and 100 years are computed with HEC-HMS software, developed by Hydrologic Engineering Centre (HEC) and US Army Corps of Engineers which computes the runoff discharge from the precipitation. As for land covered index (LCI), it is defined as the sum of the land-use index (LUI). The result of the case study shows the strong correlation between the land covered index with the the runoff discharge with such relation : Q100 = -22.42LCI2 + 214.30LCI - 10.62, Q50 = -18.33LCI2 + 181.87LCI - 20.19, Q20 = -14.30LCI2 + 145.27LCI - 15.61, Q10 = -11.36LCI2 + 118.41LCI - 12.29, Q5 = -8.42LCI2 + 91.27LCI - 8.9 and Q2 = -4.44LCI2 + 53.54LCI - 4.5.
PERBEDAAN HASIL TANGKAPAN DAN TINGKAT KEUNTUNGAN NELAYAN TRAMMEL NET DAN NELAYAN GILL NET DI PERAIRAN PANTAI PASIR, KECAMATAN AYAH, KABUPATEN KEBUMEN Prasetyo, Wahyu; Rosyid, Abdul; Dewi, Dian Ayunita NN
Journal of Fisheries Resources Utilization Management and Technology Vol 4, No 4: Oktober, 2015
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

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Abstract

Kebumen mempunyai panjang pantai 57,90 km, dimana 17,80 km terdiri dari pantai berbukit, berkarang dan sisanya merupakan pantai berpasir, serta luas wilayah laut yang dikelola 16.880,66 km2, dengan usaha penangkapan menggunakan trammel net, gill net, dan juga long line (rawai). Tujuan dari penelitian ini adalah menghitung, menganalisis perbedaan hasil tangkapan, dan perbedaan besarnya keuntungan yang diperoleh nelayan trammel net dan gill net, menganalisis keuntungan dengan menghitung R/C Ratio, Rentabilitas, dan PP (Payback Period). Metode penelitian yang digunakan adalah metode deskriptif. Metode pengambilan sampel menggunakan metode purposive sampling dengan jumlah responden 11 untuk trammel net  dan 12 responden untuk gill net. Metode analisis yang digunakan adalah analisis ekonomi dan analisis finansial. Hasil penelitian dari analisis ekonomi untuk usaha perikanan trammel net diperoleh biaya total Rp 36.883.076,92, dengan pendapatan Rp 49.218.059,09, dan keuntungan sebesar Rp 12.334.982,2/th, sedangkan untuk gill net diperoleh biaya total Rp 37.532.927,35, pendapatan Rp 45.913.429,17, dan keuntungan Rp 8.380.501,82/th.  Dari analisis keuntungan didapatkan hasil R/C untuk trammel net 1,62 rentabilitas 53,41 %, PP 3,79. Sedangkan R/C untuk gill net 1,2 rentabilitas 18,04 %, PP 5,54. Hasil tangkapan yang diperoleh trammel net dan gill net  berbeda, untuk trammel net memperoleh udang Jerbung, udang Dogol, ikan Lidah, ikan Layur, dan ikan Kembung sedangkan untuk gill net  memperoleh hasil yang lebih variatif antara lain ikan Bawal Putih, ikan Layur, ikan Cucut, ikan Pari, ikan Manyung, dan ikan rucah lainnya. Kebumen has 57,90 km coastline, were 17,80 km is hilly coast, coral and the other’s sand beach, also has 16.880, 66 km2 marine areas, with fishing acctivies mostly used by trammel net, gill net, and longline fishing. The purpose of this study was to counting and analyze the differences in the catch, the difference in the amount of net profits betwen trammel net and gill net, analyze profits by calculating the R/C Ratio, Rentability, PP (Payback Period). Descriptive method based on case studies used in the study taking those sample. Sampling method used is purpsive sampling with 11 respondents for trammel net and 12 respndent for gill net. Method used is purposive sampling. Methods of analysis used is the economic analysis and financial analysis. Results of economic analysis to trammel net fishery  shows that  the total costs Rp 36.883.076,92, total revenue Rp 49.218.059,09, profit of Rp 12.334.982,2 by year,  to hade  gill net nets showed that the cost of Rp 37.532.927,35 total revenue amounting to Rp 45.913.429,17, a profit of  Rp 8.380.501,82 by year. From the analysis of the advantages in getting the R/C  for trammel net 1,33, rentability 26,33 %, PP 3,79. R/C for gill net 1,2, rentability 18,04, PP 5,54. By catch for trammel net and gill net are different, trammel net gets Penaeus merguensis, Metapenaeus monoceros, Cynoglossus lingua, Trichiurus lepturus, and Rastrelliger sp, while gill net gets Pampus argenteus, Trichiurus lepturus, Rhizoprionodon acutus, Dasyatis sp, Arius thalassinus, and the other fish. 
Analysis on The Effect of Groyne Type Impermeable Placement on Sediment Distribution in Lariang River Bend Prasetyo, Wahyu; Juwono, Pitojo Tri; Sisinggih, Dian
Civil and Environmental Science Journal (CIVENSE) Vol 4, No 1 (2021)
Publisher : Fakultas Teknik UB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2021.00401.5

Abstract

Sedimentation and erosion caused by differences in discharge is a problem that often occurs at river bends. One of the functions of placing the groyne is to reduce the river flow velocity along the riverbank, accelerate sedimentation, and ensure the embankment or river bank's safety against scouring. This study aimed to determine the distribution of current velocity, distribution of riverbed shear stress, and sediment distribution to the effect of groyne placement. There are 7 (seven) simulation models used to get the most effective groyne placement. From the model simulation results by adding a groyne building on the river's outer bend for the simulation model scenario 2 to scenario 7, the largest sedimentation production is in scenario 3, namely the height of riverbed sediment deposits 230 hours of 1.094 m. Furthermore, the groyne building's effective placement is determined based on a maximum change in the riverbed scenario. In scenario 3, the placement and dimensions of the groyne length of 17.5 m; distance between groyne 24.4 m; the groyne is inclined upstream in the direction of flow 10°.