Articles

Found 31 Documents
Search

GETARAN BATANG SUBSOILER AKIBAT GANGGUAN ALAMI DARI VARIASI GAYA POTONG TANAH Soeharsono, Soeharsono; Setiawan, Radite P. A.; Mandang, Tineke
Jurnal Teknik Mesin Vol 10, No 1 (2008): APRIL 2008
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (255.179 KB) | DOI: 10.9744/jtm.10.1.pp. 46-51

Abstract

Analytical and experiment study on vibratory tillage tools by adding an external energy to the tillage tools has been widely applied. This method would significantly reduce soil?s resistance; unfortunately it uses a lot of energy. Self excited vibration phenomenon on vibrating subsoiler has also been shown experimentally reduce soil?s resistance though not as much as the former. However no analytical study of the latter method can be found. This paper present mathematical derivation of shank-subsoiler?s vibration due to natural excitation of varied cutting forces. Shank-subsoiler was modeled as a single degree of freedom; while the natural excitation of varied cutting force was modeled as a periodic function. This paper also discusses the effect of spring?s elasticity to maximum displacement of the tillage-tools. Therefore, the possibility of decreasing the soil-cutting force for loosening soil?s density due to self exited vibration significantly is visualized. Abstract in Bahasa Indonesia: Studi analitis dan eksperimental terhadap penggetaran tillage tools dengan cara memberikan energi mekanis ke tillage tools telah banyak dilakukan. Walaupun metode ini berhasil menurunkan tahanan tanah secara signifikan, namun penggunaannya berakibat pada kenaikan konsumsi energi secara berlebihan. Penggetaran dengan cara menggunakan metode eksitasi sendiri pada subsoiler getar juga telah banyak dilakukan secara eksperimental. Penggetaran dengan cara ini berhasil menurunkan tahanan tanah. Namun, penurunannya tidak sebesar yang dicapai dengan cara sebelumnya. Kendati demikian, studi analitis terhadap penggetaran dengan cara yang kedua ini belum pernah dilakukan. Oleh sebab itu, pada makalah ini akan dibahas tentang penurunan persamaan matematik dari getaran subsoiler shank akibat gangguan alami yang timbul karena variasi gaya potong tanah. Getaran subsoiler shank dimodelkan sebagai getaran dari sistem getaran dengan satu derajad kebebasan. Sedang gangguan alami dimodelkan sebagai fungsi periodik. Selain itu pengaruh elastisitas pegas terhadap besar simpangan maksimum dari getaran subsoiler shank juga dibahas pada makalah ini. Berdasarkan persamaan matematik yang telah diturunkan, diungkapkan bahwa pada frekuensi resonansi, subsoil shank akan begetar hebat sehingga diharapkan mampu menurunkan tahanan dan gaya potong yang diperlukan untuk membongkar kepadatan tanah, secara signifikan. Kata kunci: Self excited, vibration, subsoiler shank, tahanan tanah, elastisitas pegas
EFISIENSI USAHA PEMBIBITAN AYAM LOKAL UNGGUL BALITBANGTAN SKALA PETERNAKAN RAKYAT Rusdiana, S; Soeharsono, Soeharsono
Jurnal Ilmiah Ilmu-Ilmu Peternakan Vol 22 No 2 (2019): Edisi Nopember 2019
Publisher : Fakultas Peternakan Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (321.976 KB) | DOI: 10.22437/jiiip.v22i2.8349

Abstract

Penelitian ini dilakukan di Desa Bojonglongok Kecamatan Parakansalak Kabupaten Sukabumi tahun 2018. Peneliian menggunakan model usaha ayam lokal unggul Balitbangtan yang diusahakan inti dan  kelompok peternak plasma. Sebelum penelitian dimuali terlebih dahulu dilakukan koordinasi dengan Dinas setempat. Data primer diperoleh dari peternak langsung dan data sekuder diperoleh dari Dinas setempat. Data primer dan data sekunder dianalaisis secara diskriptif, kuantitatf dan analisis ekonomi. Tujuan penelitian ini adalah untuk mengetahui efisiensi usaha pembibitan ayam lokal unggul balitbangtan skala peternakan rakyat. Hasil penelitian menunjukkan bahwa, produksi DOC rata-rata setiap periode penetasan/minggu pada periode awal sebanyak 408 ekor, meningkat menjadi 2 kali lipat, seiring dengan meningkatnya produksi telur. Periode ke-12 produksi DOC mencapai sebanyak 1.212 ekor. Rataan produksi DOC sampai 12/periode penetasan sebanyak 814 ekor/periode.Keuntungan peternak sebesar Rp.4.160.000 atau sebesar Rp.693.333/bulan. Persentasi tingkat keuntungan atas biaya sebesar 6,33%/periode atau sebesar 1,05%/bulan dengan tingkat efisiensi R/C sebesar 1,06. Secara ekonomi usaha pembibitan ayam lokal unggul di inti dan di kelompok peternak plasma dapat di pertahankan usahanya.
MENDETEKSI KERUSAKAN BANTALAN DENGAN MENGGUNAKAN SINYAL VIBRASI Wahyudi, Tri; Soeharsono, Soeharsono; Eddy, Noor
SINERGI Vol 20, No 2 (2016)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (736.786 KB) | DOI: 10.22441/sinergi.2016.2.006

Abstract

Tujuan dari penelitian ini adalah untuk mengetahui tingkat kerusakan dan karakteristik spektrum vibrasi dari bantalan yang masih bagus, bantalan yang cacat 30% di lintasan dalam, cacat 30% di lintasan luar, cacat 30% di rolling element, dan bantalan yang rusak secara alami. Penelitian dilakukan dengan rig tool menggunakan bantalan 2205-K-2RS-TVH-C3 pada kecepatan 1500rpm, sinyal vibrasi diukur dengan alat FAG Detector III. Selanjutnya dilakukan analisa dengan trendline software. Hasil penelitian menunjukkan bahwa bantalan dengan kondisi bagus memiliki karakteristik amplitudo velocity dibawah 1.80 mm/s dan spektrum vibrasi FFT velocity dan demodulation of acceleration yang tidak berimpitan dengan garis frekuensi impuls baik BPFI, BPFO dan BSF. Bantalan cacat 30% di lintasan dalam menghasilkan amplitudo velocity yang tinggi. Bantalan cacat 30% di lintasan luar dan cacat 30% di rolling element memiliki amplitudo velocity cenderung bervariasi. Bantalan yang cacat 30% di lintasan dalam, lintasan luar ataupun di rolling element menghasilkan spektrum vibrasi FFT velocity dan demodulation of acceleration dengan garis puncak frekuensi berimpitan dengan garis frekuensi impuls masing-masing BPFI, BPFO atau BSF. 
ANALISIS KELAYAKAN DAN MANAJEMEN USAHA PETERNAKAN SAPI PERAH PENERIMA KREDIT SIMPAN PINJAM DI KOPERASI SAE PUJON Arief, Fahmi; Hariyani, Nenny; Soeharsono, Soeharsono; Lokapirnasari, Widya Paramitha; Lamid, Mirni; Arif, Anam Al
Jurnal Ilmu dan Teknologi Peternakan Tropis Vol 6, No 3 (2019): JITRO, September
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/jitro.v6i3.7513

Abstract

ABSTRAK                                                                        Penelitian bertujuan untuk mengetahui analisis sistem manajemen usaha peternak sapi perah penerima kredit modal usaha di KUD SAE Pujon terhadap kelayakan usaha peternakan sapi perah dan analisis kelayakan usaha anggota peternakan sapi perah penerima kredit modal usaha di Koperasi SAE Pujon. Penelitian ini merupakan penelitian eksploratif. Penentuan lokasi dan 30 responden berdasarkan metode purposive sampling dari total semua peternak penerima kredit modal usaha yang ada di Koperasi SAE Pujon. Pengumpulan data dilakukan dengan cara teknik kuisoner, dokumentasi dan teknik wawancara.   Jumlah ternak, jumlah produksi dan harga jual susu, kredit modal usaha dan manajemen peternakan adalah variabel bebas dan analisis kelayakan usaha adalah variabel tergantung. Indikator dari sistem manajemen yaitu manajemen bibit, pakan, kandang dan kesehatan. Indikator analisis kelayakan usaha yaitu break event point (BEP) unit, break event point (BEP) harga dan benefit cost ratio (B/C Ratio). Hasil penelitian menunjukkan bahwa: (1) Hubungan SDA dan pelaksanaan kerja berpengaruh terhadap analisa usaha dalam persamaan (AU = -0,267*SDA + 0,226*PK), kemudian hubungan kredit simpan pinjam dan analisa usaha berpengaruh terhadap kelayakan usaha dalam persamaan (AKLU = 0,794*BP + 0,260*KSP).Kata Kunci: analisis kelayakan, kredit usaha, sistem manajemen, sumber daya alamABSTRACTThe cooperative also provides supporting facilities, one of which is a cooperative providing credit to the community. The study aimed to determine the analysis of the business management system of dairy farmers who received venture capital loans at KUD SAE Pujon on the feasibility of dairy farming businesses and an analysis of the business feasibility of members of the dairy farm recipients of business capital at SAE Pujon Cooperative. This research is exploratory. Location determination and 30 respondents based on the purposive sampling method of the total all farmers receiving business capital loans at the SAE Pujon Cooperative. Data collection is done by questionnaire techniques, documentation and interview techniques. The number of livestock, the amount of production and the selling price of milk, business capital credit, and livestock management are independent variables and the business feasibility analysis is a dependent variable. Indicators of the management system are the management of seeds, feed, pens, and health. Business feasibility analysis indicators are break event points (BEP) units, break event points (BEP) prices and benefit-cost ratio (B/C Ratio). The results showed that: (1) The relationship of natural resources and work implementation had an effect on business analysis in the equation (AU = -0.267 * SDA + 0.226 * PK), then the relationship between savings and loans and business analysis had an effect on business feasibility in the equation (AKLU = 0.794 * BP + 0.260 * KSP).Keywords: capital loans, feasibility analysis, management system, natural resources
ANALISIS USAHA PEMBERIAN BAKTERI ASAM LAKTAT (BAL) PADA AYAM PEDAGING TERHADAP PERSENTASE BERAT KARKAS Syam, R. F.; Soepranianondo, K.; Lokapirnasari, W. P.; Soeharsono, Soeharsono; Hidanah, S.; Ardianto, Ardianto
Jurnal Sain Peternakan Indonesia Vol 14, No 4 (2019)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jspi.id.14.4.338-344

Abstract

Peternakan merupakan subsektor pertanian yang memiliki peran penting dalam pemenuhan kebutuhan protein hewani yang semakin meningkat. Bakteri, virus, parasit, jamur, lingkungan dan kekurangan nutrisi merupakan penyebab rentannya peternakan ayam pedaging terserang penyakit. Penggunaan antibiotik merupakan salah satu cara pengobatan dan pencegahan penyakit, namun pemberian antibiotik yang tidak tepat dosis dapat menimbulkan residu antibiotik. Tujuan penelitian ini adalah untuk mengetahui analisis usaha ayam pedaging yang diberi bakteri asam laktat terhadap peningkatan persentase berat karkas. Terdiri dari 300 ekor DOC yang diacak kedalam tiga kelompok perlakuan, masing-masing terdiri dari 100 ekor. Perlakuan terdiri dari P0 (Pakan komersial dan air minum), P1 (Pakan komersial dan air minum + BAL 106 CFU/ml), dan P3 (pakan komersial dan air minum + BAL 108 CFU/ml). Hasil penelitian menunjukkan bahwa pemberian BAL pada air minum belum mampu meningkatkan persentase berat karkas dan menurunkan persentase lemak abdominal, namun layak untuk dilakukan karena masih memberikan keuntungan. 
Analisis Distribusi Tegangan Pada Kepala Baut Dengan Variasi Filet Menggunakan Metode Fotoelastisitas Sukarnoto, Tono; Soeharsono, Soeharsono
MESIN Vol 9, No 3 (2007): Ocean Thermal Energy Conversion (OTEC) untuk "Pulau-pulau Kecil"
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Stress Distribution Analysis on Bolt Head with Various Fillets Using PhotoelasticityMethod. A geometry modification can be use to reduce stress concentration. This research isinvestigating the influence offillet radius in the head ofbolt. Different than most commonbolt, thefillet ismade at the bottom surface of head around its neck. To show the stress distribution we use classicalexperimental mechanics method, photo elasticity. Loading comesfrom a lead screw and measured by aload cell connected to a computer data logger. As the result, a 5 mm fillet radius may reduce maximumshear stress up to 35%than nofillet radius, so its effective to minimize stress concentration in head bolt.
Pembibitan Ternak Sapi Potong dalam Sistem Integrasi Tanaman – Ternak di Kawasan Pantai Selatan Kabupaten Bantul Soeharsono, Soeharsono; Rustijarno, Sinung; Triwidyastuti, Kurnianita
Sains Peternakan: Jurnal Penelitian Ilmu Peternakan Vol 6, No 1 (2008): Sains Peternakan
Publisher : Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/sainspet.6.1.49-55

Abstract

This research aimed to know the management effort beef cattle breeding in the integrate crop - livestock system in  south coastal area Bantul regency of Yogyakarta Special Region. Farm Record keeping conducted livestock farmer group Andini Mukti of Poncosari village, Srandakan countryside,  Bantul regency. A number of 20 farmers grouped by as according to farming system : 1) Beef cattle breeding farming system and 2) Integrate rice crop–livestock system. Management farming and livestock noted and tabulation. Data analysed with the distribution frequency and discription. This results of research indicate that the beef cattle breeding system by ownership 2,36 cows/farmer. Beef cattle looked in group individually cage area. Hay from weste rice crop given ad libitum added consentrate mean 1,5 kg/head. Insemination system conducted with the artificial insemination made in with the S/C 2,39. Labour effusing in livestock management 114,06 work day person/farmer/year.  This result of effort in the calf and organic fertilizer. Effort income beef cattle breeding system equal Rp 3.013.000 (R/C 1,64). Integrate rice crop – livestock  with the pattern plant the paddy - paddy – crops planted. Farm ownership 1000 m2 /farmers and 2 cows which looked in cage group area. Using produce in the form of seed 45,83 kg/ha; fertilize 395,52 kg/ha and family labour 43,06 work day person and external labour 15,03 work day person every season plant. The productivity of unhulled paddy dry harvest 6,88 ton/ha. Income farming system integrate rice crop – livestock  equal to Rp 5.592.310 (R/C 1,82). Key words             : management, breeding, beef cattle, integration
Beef Cattle Business in Dry Land Area Parangloe District Gowa Rusdiana, Supardi; Soeharsono, Soeharsono; Ferasyi, Teuku Reza
The International Journal of Tropical Veterinary and Biomedical Research Vol 2, No 2 (2017): Vol. 2 (2) November 2017
Publisher : The Faculty of Veterinary Medicine of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (158.203 KB) | DOI: 10.21157/ijtvbr.v2i2.9502

Abstract

The study was conducted in the village Payangkalang Parangloe District of Gowa in South Sulawesi in 2017, with the field survey method Substance himself to Bali beef cattle breeders, through interviews and questionnaires to 18 farmers, by the way (sample random sampling). Respondents beef cattle breeders, classified into 2 (two) business model with a scale of 2 adult males and 3 females scale adult stem, this data will be analyzed using economic analysis of income B/C. Based on the information that the beef cattle population of Bali is quite a many, so that the criterion for consideration for the study area. Beside that all cattle breeders Bali is already a member of a group of farmers. The results showed that net profit in the maintenance of Bali beef cattle female parent of $13.381.250/year with  B/C ratio of 1.2 and a gain on the maintenance of male cattle Bali for $ 3.881.250 year, with B/C ratio of 1.1. To maintain a profitable cattle faremr cows, while the majority of beef cattle Bali parent can still be maintained as an investment for the procreation of children next year.
PERFORMA PRODUKSI DAN ANALISIS USAHA PUYUH (COTURNIX COTURNIX JAPONICA) YANG DIBERI SUBSTITUSI BLACK SOLDIER FLY LARVAE (BSFL) PADA PAKAN KOMERSIL Hanifah, Fithria Nisa; Soepranianondo, Koesnoto; Soeharsono, Soeharsono; Arif, Anam Al; Lokapirnasari, Widya Paramita; Harijani, Nenny; Hadijah, Siti; Hutabarat, Mariana Ruth Theresia
Jurnal Sain Veteriner Vol 37, No 2 (2019): Desember
Publisher : Fakultas Kedokteran Hewan Universitas Gadjah Mada bekerjasama dengan PB PDHI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (350.078 KB) | DOI: 10.22146/jsv.49067

Abstract

Black Soldier Fly Larvae (BSFL) is an alternative protein source for livestock. This research aimed to know the effectiveness of BSFL for commercial feed substitution, related to production, productivity, and profitability in quail farm. This study used 80 quails which divided into 4 groups and each group consist of 20 quails. The treatments contained BSFL substitution with different composition, control group (P0) was given 100% commercial feed, (P1) was given a 5% BSFL substitution, (P2) was given a 10% BSFL substitution and (P3) was given a 20% BSFL substitution. Contribution margin (CM) analysis was used to determine the yields of the groups in this study. Results showed that the highest feed consumption rate is in P3, production (egg in total and weight), productivity and yields in P3 is the highest, although there's no difference between P0, P2 and P3 based on the analysis MANOVA.  BSFL substitution at 20% is recommended to the farmers to increase profits.
Farmer Group Performance Bali Cattle In Luwu District East : The Economic Analysis Rusdiana, Supardi; Soeharsono, Soeharsono
The International Journal of Tropical Veterinary and Biomedical Research Vol 2, No 1 (2017): Vol. 2 (1) May 2017
Publisher : The Faculty of Veterinary Medicine of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (193.771 KB) | DOI: 10.21157/ijtvbr.v2i1.8634

Abstract

This research was conducted in the District Mangko Tano East Luwu in South Sulawesi Province, in 2017. The area of research is supported by oil palm plantations, palm plantations, agricultural land, forestry land, vacant land that has not been explored by farmers and other vacant land. The study was conducted by the method of field survey, according to information from the local Animal Husbandry Department, the criteria in the data is the cattle population in farmer.The purpose of this study was to determine the economic analysis on a group of cattle ranchers. Primary data and secondary data were analyzed using descriptive tabulation, quantitatively and economically. The results of the research effort shows that beef cattle, ranchers group profit amounted Rp.3.637.500/year, Agung Sindo  Village B/C ratio of 1.2, Kalaenaliri village of Rp.3.886.000/ year ratio B/C 1.2, and the Wanasari Village of Rp.3.788.000/year and ratio of B/C 1.2. Forage in locations very research support to the development of beef cattle Bali. But farmers are accustomed way of raising beef cattle between 2-4 head/breeder, so it needs additional maintenance business scale between 5-10 cattle/livestock farmers, so that the business more effectively and efficiently and economically will benefit farmers.