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All Journal Jurnal Ilmu Ternak Veteriner Majalah Ilmiah Material, Komponen dan Konstruksi
Anwar .
Loka Penelitian Kambing Potong
Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Veterinary

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Cryopreservation of Boer goat spermatozoa: Comparison of two freezing extenders based on post-thaw sperm quality and fertility rates ., Anwar; Pamungkas, Fitra Aji; Batubara, Aron
Indonesian Journal of Animal and Veterinary Sciences Vol 19, No 2 (2014)
Publisher : Indonesian Animal Sciences Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (274.554 KB) | DOI: 10.14334/jitv.v19i2.1041

Abstract

Boer goat have recently been popularly used for cross breeding with local goats. However, it is currently considered a breed at very limited number with relatively high prices . In this context, the cryopreservation of spermatozoa is important because it could be conserved for a very long period of time. Egg yolk extenders are most commonly used for cryopreservation of goat sperm. The aim of this study was to compare the ability of two extenders to maintain sperm viability after cryopreservation. Semen from three male Boer goat aged about 2-3 years old was collected using artificial vagina and frozen with Tris and Triladyl extender. The results showed that percentage of motility, viability and membrane integrity of spermatozoa with Tris and Triladyl extenders at every stage of cryopreservation showed not significantly difference (P>0.05), except the percentage of sperm motility post thawing of Triladyl was higher than Tris extender (52.00±4.47% vs 47.50±2.74%, P<0.05). Cryopreserved semen in Tris extender provided the same fertility rates after cervical insemination compared to Triladyl (62.50% vs 60.00%). In conclusion, the Tris extender has the same capabilities to Triladyl in cryopreservation of Boer goat spermatozoa as to maintain sperm quality and fertility rates. Key Words: Boer Goat, Spermatozoa, Cryopreservation, Fertility 
ANALISIS KEKUATAN STRUKTUR KERETA BARANG “FLAT WAGON” = STRENGTH ANALYSIS OF FLAT WAGON STRUCTURES ., Anwar; ruhimat, Ade
Majalah Ilmiah Material, Komponen dan Konstruksi Vol 14, No 1 (2014)
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (609.333 KB)

Abstract

This paper describes strength analysis for the flat wagon. The analysis is conducted by experiment methods using testing the flat wagon prototype with static loads such as vertical load, compression load, twist load, jacking load, and combination of them.The result of test such as stress and camber is analyzed against the design requirement and national regulation to assess the reliability of the flat wagon structure.The result of test shows that the critical area under compression load and vertical load occurs at the “end center sill” and the “central center sill”, respectively. Maximum stress of the flat wagons structure is 271.32 N/mm2 equal to 76.4% of yield stress of base material. It occurs at combination of vertical and compression loads. It indicates that the flat wagon structure is feasible to be operated with maximum capacity of 40 tons.Keywords : flat wagon, static load test, compression load, stress analysis.Abstrak Makalah ini membahas analisis kekuatan struktur gerbong kereta barang tipe gerbong datar (flat wagon). Analisis dilakukan dengan menguji prototipe struktur flat wagon secara eksperimental dengan jenis beban statis yang terdiri dari beban vertikal, kompresi, twist, jacking, dan kombinasi.Hasil pengujian berupa besaran tegangan dan camber, dianalisis terhadap persyaratan desain dan peraturan menteri untuk menilai kelayakan dari struktur flat wagon.Dari hasil pengujian diperoleh titik kritis akibat beban kompresi adalah di lokasi ”end center sill”, sedangkan akibat beban vertikal, adalah di lokasi ”central center sill”. Tegangan terbesar yang terjadi akibat pengujian yaitu sebesar 271.32 N/mm2 atau setara dengan 76.4% dari tegangan yield material dasarnya, terjadi pada kondisi beban kombinasi antara beban vertikal dan beban kompresi.Dari analisis dan verifikasi hasil uji terhadap persyaratan desain dan peraturan menteri, disimpulkan bahwa struktur flat wagon mampu dan layak digunakan dengan kapasitas daya angkut maksimum 40 ton.Kata Kunci : gerbong datar, uji beban statis, beban kompresi, analisis tegangan.
ANALISIS KERUSAKAN GERBONG DATAR “PPCW”42 TON AKIBAT BEBAN OPERASI ., Anwar; Gozali, M.
Material Komponen dan Konstruksi Vol 16, No 1 (2016)
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1793.838 KB) | DOI: 10.29122/mkk.v16i1.3285

Abstract

Several units of PPCW wagons capacity of 42 ton are used for the cement transportation, cracked on the under frame structures. To determine the cause of the cracks, the investigation was conducted by measuring the stress that occurs when the wagons operation.Results of the investigations are the mean stresses and amplitude stresses measured in real-time in the various road conditions, and then be analyzed using fatigue limit diagram approach to get fatigue strength of the wagon structure. The analysis result shows that the stresses at several points of the wagon structure under the operational loads are in the critical area or is above the fatigue limit diagram. This is the cause of the failure of the under frame of the PPCW wagon structure.AbstrakBeberapa unit gerbong PPCW kapasitas 42 ton yang digunakan untuk pengangkutan semen, mengalami retak pada bagian rangka bawah. Untuk menegetahui penyebab terjadinya retak tersebut, dilakukan penelitian dengan cara mengukur tegangan yang terjadi pada saat gerbong beroperasi.Hasil penelitian berupa besaran tegangan rata-rata dan tegangan amplitudo yang diukur secara real-time pada berbagai kondisi jalan, dianalisis dengan menggunakan pendekatan diagram batas lelah. Hasil analisis menunjukkan bahwa tegangan pada beberapa titik berada pada daerah kritis atau diagram garis batas lelah. Hal ini merupakan penyebab terjadinya kerusakan struktur rangka bawah gerbong PPCW.Keywords : PPCW wagon, stresses, fatigue limit diagram.
ANALISIS KERUSAKAN GERBONG DATAR "PPCW" 42 TON AKIBAT BEBAN OPERASI ., Anwar; Gozali, M.
Jurnal Material Komponen dan Konstruksi Vol. 16 No. 1 (2016)
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1793.838 KB) | DOI: 10.29122/mkk.v16i1.3285

Abstract

Several units of PPCW wagons capacity of 42 ton are used for the cement transportation, cracked on the under frame structures. To determine the cause of the cracks, the investigation was conducted by measuring the stress that occurs when the wagons operation. Results of the investigations are the mean stresses and amplitude stresses measured in real-time in the various road conditions, and then be analyzed using fatigue limit diagram approach to get fatigue strength of the wagon structure. The analysis result shows that the stresses at several points of the wagon structure under the operational loads are in the critical area or is above the fatigue limit diagram. This is the cause of the failure of the under frame of the PPCW wagon structure. Abstrak Beberapa unit gerbong PPCW kapasitas 42 ton yang digunakan untuk pengangkutan semen, mengalami retak pada bagian rangka bawah. Untuk menegetahui penyebab terjadinya retak tersebut, dilakukan penelitian dengan cara mengukur tegangan yang terjadi pada saat gerbong beroperasi. Hasil penelitian berupa besaran tegangan rata-rata dan tegangan amplitudo yang diukur secara real-time pada berbagai kondisi jalan, dianalisis dengan menggunakan pendekatan diagram batas lelah. Hasil analisis menunjukkan bahwa tegangan pada beberapa titik berada pada daerah kritis atau diagram garis batas lelah. Hal ini merupakan penyebab terjadinya kerusakan struktur rangka bawah gerbong PPCW. Keywords : PPCW wagon, stresses, fatigue limit diagram.
ANALISIS KEKUATAN STRUKTUR KERETA BARANG “FLAT WAGON” = STRENGTH ANALYSIS OF FLAT WAGON STRUCTURES ., Anwar; ruhimat, Ade
Jurnal Material Komponen dan Konstruksi Vol. 14 No. 1 (2014)
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (609.333 KB) | DOI: 10.29122/mkk.v14i1.1651

Abstract

This paper describes strength analysis for the flat wagon. The analysis is conducted by experiment methods using testing the flat wagon prototype with static loads such as vertical load, compression load, twist load, jacking load, and combination of them.The result of test such as stress and camber is analyzed against the design requirement and national regulation to assess the reliability of the flat wagon structure.The result of test shows that the critical area under compression load and vertical load occurs at the “end center sill” and the “central center sill”, respectively. Maximum stress of the flat wagons structure is 271.32 N/mm2 equal to 76.4% of yield stress of base material. It occurs at combination of vertical and compression loads. It indicates that the flat wagon structure is feasible to be operated with maximum capacity of 40 tons.Keywords : flat wagon, static load test, compression load, stress analysis.Abstrak Makalah ini membahas analisis kekuatan struktur gerbong kereta barang tipe gerbong datar (flat wagon). Analisis dilakukan dengan menguji prototipe struktur flat wagon secara eksperimental dengan jenis beban statis yang terdiri dari beban vertikal, kompresi, twist, jacking, dan kombinasi.Hasil pengujian berupa besaran tegangan dan camber, dianalisis terhadap persyaratan desain dan peraturan menteri untuk menilai kelayakan dari struktur flat wagon.Dari hasil pengujian diperoleh titik kritis akibat beban kompresi adalah di lokasi ”end center sill”, sedangkan akibat beban vertikal, adalah di lokasi ”central center sill”. Tegangan terbesar yang terjadi akibat pengujian yaitu sebesar 271.32 N/mm2 atau setara dengan 76.4% dari tegangan yield material dasarnya, terjadi pada kondisi beban kombinasi antara beban vertikal dan beban kompresi.Dari analisis dan verifikasi hasil uji terhadap persyaratan desain dan peraturan menteri, disimpulkan bahwa struktur flat wagon mampu dan layak digunakan dengan kapasitas daya angkut maksimum 40 ton.Kata Kunci : gerbong datar, uji beban statis, beban kompresi, analisis tegangan.
Co-Authors Ade ruhimat, Ade Aron Batubara Fitra Aji Pamungkas Gozali, M. Gozali, M.