Judul: Precision Motion Analysis Using Motion Capture (Noitom) in Oil Palm Harvestin
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: Studi Gerak dan Aplikasinya untuk Peningkatan Efektivitas dan Keselamatan Kerja Pemanenan Kelapa Sawit Secara Manual
Abstrak: Oil palm harvesting activities may cause manual occupational safety and health problems. Motion study using natural range of motion (ROM) is needed to repair the process of harvesting so the movement can be more efficient and the fatigue can be reduced. Manual harvesting activities by using conventional tools named ‘dodos’ and ‘egrek’ were studied in this research. The aims of this research is to know the movement pattern and the risks distribution of the work motions, determine the level of the motion risks of harvesting procedure to minimize the risk. The result of ROM analysis show that the ergonomic risk occur in all of the upper body, such as the neck, shoulder and forearm. It is revealed that ‘dodos’ more effective than ‘egrek’ for 3 m bunches’s height and be optimum for 1 m bunches’s height. The good practice models for ‘egrek’ revealed that the ideal position of harvester is 30-45o relative from the position of the bunch and the formula for the distance is 𝑑=0.5 ℎ−𝑡 + 0.3, where d is the distance between harvester’s position and the tree, h is bunches’s height and t is the harvester’s height.
Keyword: 

Judul: Sintesis dan Pencirian Kompleks Fe(III)-Kuersetin
Abstrak: Quercetin belongs to flavonols which is able to chelate metal ions. Quercetin may chelate metal ions at 3’,4’-catechol, 3- or 5-hydroxycromone sites. In this study, quercetin was complexed with Fe(III). The complex with Fe(III) ions from FeCl3·6H2O was more stable than the complex derived from Fe(NO3)3·9H2O. The quercetin was yellow in color and showed maximum wavelengths (λ􀭫􀭟􀭶) at 250 and 370 nm. The Fe(III)-quercetin complex from Fe(NO3)3·9H2O was yellowish green with 􀟣􀭫􀭟􀭶 at 280 and 420 nm, whereas that from FeCl3·6H2O was dark green with 􀟣􀭫􀭟􀭶 at 280 and 430 nm. The 􀟣􀭫􀭟􀭶 shift indicated that the complex was formed at 3-hydroxychromone site. The Fe(III)- quercetin complex was formed with 1:1 metal-ligand mole ratio based on atomic absorption spectrophotometry analysis and the X-ray diffractogram showed that the crystallinity of the complex was 37%.
Keyword: