Judul: Analisis Postur untuk Mengetahui Risiko Keselamatan Kerja Penggebot Padi Sawah di Gapoktan Silih Asih, Bogor.
Abstrak: Kegiatan pemanenan padi sawah yang dikerjakan secara manual mempunyai resiko kerja yang tinggi. Gerakan penggebotan yang dilakukan secara berulang ulang dan beban kerja yang berat akan menimbulkan kelelahan yang terakumulasi. Tujuan penelitian ini adalah untuk menganalisis kegiatan pemanenan padi sawah secara manual yaitu dengan alat gebot melalui pendekatan ergonomi dengan analisis postur agar diperoleh proses pemanenan yang aman sehingga dapat mengurangi risiko kerja yang bahaya. Analisis Range of Motion (ROM) menunjukkan bahwa bagian fleksi bahu, fleksi punggung, fleksi lengan atas dan ekstensi leher berada dalam zona bahaya. Evaluasi ergonomi terhadap postur kerja petani menggunakan metode Rapid Entire Body Asesessment (REBA) menunjukkan bahwa pada elemen kerja Tl berada diantara skor 8 sampai 11 sehingga diperlukan perubahan kondisi kerja. Berdasarkan analisis perbaikan prosedur kerja dan posisi tubuh saat menggebot dihasilkan posisi terbaik saat akan melakukan penggebotan dengan merubah sudut postur tubuh saat melakukan pengambilan padi dari tumpukan.
Keyword: gebot, posture, REBA, ROM

Judul: Precision Motion Analysis Using Motion Capture (Noitom) in Oil Palm Harvesting
Abstrak: Kegiatan pemanenan kelapa sawit di Indonesia masih dilakukan secara manual dengan menggunakan tenaga manusia. Aktivitas yang dilakukan secara manual ini sangat berisiko dalam menyebabkan gangguan otot rangka atau Musculoskeletal Disorders (MSDs). Penelitian ini bertujuan untuk memetakan tingkat risiko kerja berdasarkan postur pemanen dengan menggunakan analisis Range of Motion (ROM) dan Rapid Entire Body Assessment (REBA) untuk menjadi rekomendasi perbaikan postur kerja yang aman bagi pemanen kelapa sawit. Penelitian ini juga bertujuan untuk mengetahui korelasi antara ekstensi pada leher dengan tinggi badan, fleksi pada bahu dengan fleksi pada lengan bawah, dan fleksi pada pangkal paha dengan fleksi pada lutut pada pemanenan kelapa sawit, serta mengetahui gerakan yang besarnya dipengaruhi oleh letak bagian tubuh pada pemanenan kelapa sawit. Data pada penelitian ini diambil menggunakan metode motion capture lalu kemudian diolah dengan menggunakan software Axis Neuron dan Biomechanics of Bodies. Hasil analisis ROM menunjukkan tubuh bagian atas memiliki risiko lebih tinggi mengalami MSDs dengan leher, bahu, dan lengan bawah menjadi bagian tubuh yang paling banyak berada dalam zona bahaya. Kegiatan pemanenan kelapa sawit mendapat skor 12-14 pada penilaian REBA yang berarti perlu segera dilakukan intervensi ergonomika untuk memperbaiki metode ataupun prosedur kerja agar risiko dapat dimitigasi ataupun diminimalisir., Oil palm harvesting activities in Indonesia are still carried out manually using human labor. This manual activity is very risky to cause Musculoskeletal Disorders (MSDs). This study aims to map the level of work risk based on the posture of harvesters using Range of Motion (ROM) analysis and Rapid Entire Body Assessment (REBA) to be a recommendation for improving safe work postures for oil palm harvesters. This study also aims to determine the correlation between neck extension with height, shoulder flexion with elbow flexion, and hip flexion with knee flexion in oil palm harvesting, and determine the movements that are most influenced by the location of body parts in oil palm harvesting. The data were taken using the motion capture method and then processed using Axis Neuron and Biomechanics of Bodies. The ROM analysis results show that the upper body has a higher risk of MSDs with the neck, shoulders, and forearms as the body parts that are most in the danger zone. Oil palm harvesting activities received a score of 12-14 on the REBA assessment which means ergonomic interventions need to be carried out immediately to improve work methods or procedures so that risks can be mitigated or minimized.
Keyword: oil palm harvesting, ergonomy, motion analysis, ROM, REBA

Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
Keyword: