Judul: A Multicriteria Optimization Model in the Volunteer Scheduling at Disaster Area.
Abstrak: Penanganan daerah bencana seringkali melibatkan tenaga sukarelawan dalam menyelesaikan berbagai tugas seperti pencarian korban, evakuasi korban ke daerah yang lebih aman, dan menyediakan tempat pengungsian yang layak untuk para korban. Dalam karya ilmiah ini, masalah penugasan tenaga sukarelawan dimodelkan dalam bentuk pemrograman linear bilangan bulat multikriteria. Peminimuman biaya kekurangan dan peminimuman tugas yang tidak diinginkan dari segi waktu dan jenis tugas dijadikan sebagai fungsi-fungsi objektif. Masalah pengoptimuman ini diselesaikan dengan dua metode yaitu, metode kendala-ε dan metode pembobotan. Penyelesaian masalah ini dilakukan dengan menggunakan bantuan software LINGO 8.0, yang menghasilkan nilai optimal berupa total biaya kekurangan minimum dan jumlah minimum penugasan sukarelawan pada blok waktu dan tugas yang tidak diinginkannya. Hasil karya ilmiah ini memberikan sebuah penjadwalan sukarelawan selama berada di daerah bencana.
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Judul: Model optimasi pendistribusian logistik bencana alam
Abstrak: Logistics distribution in emergency situations involves dispatching commodities (medical materials, specialized rescue equipment and rescue teams, food, etc.) to the affected areas. The optimization process is done by combining the optimal logistics distribution with vehicles scheduling, such that quantity and capacity loads of every vehicle is satisfied. At the end of logistics distribution process it is possible that there is unsatisfied demand in affected area. The minimization of unsatisfied demand can be regarded as an integer linear programming problem (ILP). The problem can be solved using branch and bound method. Optimal value is obtained using Lingo 8.0 Unlimited software.
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Judul: Heat Sealing Properties Of Fish Gelatin Film
Abstrak: All fish gelatins have been observed to exhibit good film forming properties, yielding transparent, nearly colourless, water soluble, and highly extensible films. The objectives of this research are to analyze heat sealing property of gelatin film at different temperature and time. The film prepared from fish gelatin and use glycerol as plasticizer. Protein of gelatin determined in the beginning for preparation of gelatin film. In preliminary experiment used five level of glycerol (15% glycerol, 20% glycerol, 25% glycerol, 30% glycerol, and 35% glycerol) to determine one level of glycerol which will use for futher study of sealing property. The result showed that 25% of glycerol determined will used for sealing study. Result determined based on properties of the film which is color, mechanical properties, and moisture content. In the next experiment, the film will be sealed in different combination temperature (100 0C, 110 0C, and 120 0C) and time (1 s, 2 s, and 3 s). Then it will be analyzed the color, transparency, opacity and seal strength. Result showed that there was no significant different in color, transparency and opacity when it sealed. But the film have transparent appearance and excellent barrier properties against UV light like before it sealed. Temperature and time have effect on seal strength of the film (p<0.05). The higher temperature or time cause the seal strength increase. But combination time and temperature didn’t affect significantly on seal strength (p>0.05). Highest seal strength was observed at temperature 110 0C and time 3 s for 25% glycerol concentration of the film.
Keyword: fish gelatin film, heat seal, seal strength, temperature, time