Judul: Development model of working productivity using ergonomic factors in primary tillage of paddy field
Abstrak: The measurement of working productivity of hand tractor including factors affecting the productivity, in soil tillage of paddy field has not been performed precisely. The working productivity is more likely influenced by the skill and comfort in operating the tractor. Design aspect on work productivity is the suitable ergonomic design which gives optimum working productivity. Two models have been developed to investigate the relationship between ergonomic factors and working productivity in primary tillage. The first model (A) was applied to soil tillage by hand tractor with gelebeg implement and the second model (B) was applied to soil tillage by hand tractor with rotary implement. Ergonomic factor analyzed in the model was the optimal height of the steer. Artificial neural network was used to formulate the non linear relationship among the analyzed parameters. The models, which are A and B, have accuracy of calibration 97% and 93% respectively, as well as accuracy of validation 89% and 87%. The outputs models are productivity and workload.
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Judul: Kajian Pemilihan Alternatif Penyiangan Gulma Padi Sawah
Abstrak: One of the major problems in organic rice farming is weed eradication activity, or commonly called weeding. Conventional weeding is extremely time consuming work and require a lot of labor. Contrarily, the number of population working in agriculture sector has been decreasing over time in comparison to the industrial sector. To cope with this existing problem, switching from conventional to mechanical or semi-mechanical tools is needed for most agricultureal areas. However, the use of these tools should also take the human factor into consideration so that optimal human-machine system may be possible to be applied. In addition, the design of the equipment should also consider the safety and health as well as ergonomic factors of operator. The objective of the research was to find out the operator workload value and work effectiveness resulting from three weeding activities i.e. hand weeding, semi mechanical weeding and mechanical weeding. Research was conducted in the organic farmers rice fields in Situgede, West Bogor prefecture, Bogor city, West Java. Semi-mechanical weeding involved two types of weeder, namely local gasrok-weeder type (Indonesian weeder) and Japanese roller-weeder type. In order to determine the most appropriate weeding type, the technical (including ergonomics), economic and environmental aspects of each weeding types were investigated. Various data were collected during the experiment such as: (i) weeding performance (manually, semi-mechanical and mechanical/power operated weeder); (ii) ergonomic parameters data (work load factor). Data processing was implemented in fuzzy logic–fuzzy inference system (FIS) for generating fuzzy rules operation. Model input consists of five parameters i.e. work capacity, weeding effectiveness, energy consumption, environment aspect and cost. A Mamdani FIS type with OR fuzzy operator (maximum function) was used to generate the rules for each treatment. The output is the maximum value resulted from 17 combinations rules for each weeder type. Based on the experimental results, the highest weeding performance was achieved by power weeder under flooded and muddy soil conditions. Workload measurements indicated energy requirement of all type (hand weeding, local gasrok weeder type, roller type and mechanical) that a value of energy consumption by female operator is highest than male operator. This is influences with heart rate value each operator. A value of heart rate by female operator is highest than male operator. It is mean that the muscular work of male operator is stronght. The muscular work is influences heart rate levels. For work capacity and weeding effectivity, the largest was achieved by power weeder. Based on weeding selection model using fuzy-FIS, the maximum output value was achieved by mechanical (Power weeder). However, their use should be adjusted to the level of ability, needs and goals to be achieved by user.
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Judul: Leukemia pada kucing
Abstrak: Leukemia pada kucing adalah suatu penyakit yang sangat patogen, disebabkan oleh sejenis virus. Virus ini dikenal sebagai Feline Leukemia Virus atau FeLV. FeLV ini oleh beberapa ahli dikatakan hanya bersifat ganas pada hewan kucing. Penularannya bisa secara horizontal maupun congenital. Kucing pada semua tingkat umur dapat terserang oleh FeLV ini. Khusus pada bentuk "thymic leukemia", virus ini hanya menyerang anak-anak kucing berumur diba- wah 1 tahun. Kucing-kucing liar atau yang tidak terpeli- hara jarang sekali terinfeksi FeLV. Selain dari serangan virus FeLV itu sendiri, maka penyakit leukemia ini bisa disebabkan oleh beberapa fak- tor yang sudah ada dalam tubuh hewan dan sangat menunjang perkembangan penyakit ini, yaitu antara lain tumor, agen toksik, cedera oleh kecelakaan dan gangguan hemopoiesis. FeLV menyerang sel-sel darah dalam tubuh hewan se- hingga pembentukan darah berjalan tidak normal. Terlihat sel-sel darah yang belum dewasa sudah beredar dalam sir- kulasi darah. Bentuk dan jumlahnya tidak lagi seimbang dalam tubuh hewan kucing tersebut. Gejala klinis antara lain kekurusan, ikterus, anemia, lemah, anoreksia, dyspnoe, sulit menelan, batuk, dan membran mukosa pucat. Selain itu kelenjar pertahanan tubuh juga membengkak, kemudian terjadi hepatomegali, spleenomegali dan pembengkakan pada ginjal. Terbentuk massa tumor pada beberapa tempat. Secara biopsy pada sumsum tulang akan terlihat be- berapa perubahan. Sumsum tulang berwarna merah tua atau abu-abu. Konsistensinya lunak dan terdapat banyak sekali memproduksi sel darah putih. Melalui gambaran darah leukemia ini lebih mudah didiagnosa. Jumlah retikulosit rendah sekali. PCV 8-15%, hemoglobin menurun, sel darah putih (WBC) meningkat, lim- fosit meningkat, Alfaglobulin juga ada peningkatan, dan banyak eosinofil yang belum dewasa beredar dalam darah…dst
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