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: Pengoptimuman Penjadwalan Tenaga Sukarelawan di Daerah Bencana Menggunakan Fuzzy Goal Programming
Abstrak: Relawan seringkali dibutuhkan dalam menangani daerah bencana untuk melakukan beberapa tugas seperti pencarian dan evakuasi korban bencana, membagikan bantuan, dan menyediakan tempat yang aman untuk korban bencana. Namun seringkali adanya kesulitan dalam menjadwalkan tenaga sukarelawan sesuai keinginan dan keahliannya. Dalam karya ilmiah ini, dibuat model untuk penugasan sukarelawan yang memiliki dua tujuan, yaitu meminimumkan total biaya kekurangan yang disebabkan karena tuntutan tugas yang melebihi sukarelawan yang ada serta meminimumkan jumlah penugasan pada blok waktu dan tugas yang tidak diinginkan sukarelawan. Metode yang digunakan pada model ini adalah Fuzzy Goal Programming (FGP) dan diselesaikan menggunakan pendekatan operator-min Bellman dan Zadeh. Penyelesaian masalah ini dilakukan dengan bantuan software LINGO 19.0, yang menghasilkan nilai optimal berupa total biaya kekurangan minimum dan jumlah minimum penugasan pada blok waktu dan tugas yang tidak diinginkan sukarelawan. Hasil implementasi menunjukkan bahwa model dapat diimplementasikan pada kasus bencana di suatu daerah., Volunteers are often needed in dealing with disaster areas to carry out several tasks such as searching for and evacuating disaster victims, distributing aid, and providing safe places for disaster victims. However, there are often difficulties in scheduling volunteers according to their wishes and expertise. In this scientific paper, a model for the assignment of volunteers is created which has two objectives, namely minimizing the cost of shortages caused by task demands that exceed existing volunteers and minimizing the number of assignments in blocks of time and tasks that are unwanted by volunteers. The method used in this model is Fuzzy Goal Programming (FGP) and is solved using the Min operator approach Bellman and Zadeh. Solving this problem is done with the help of LINGO 19.0 software, which produces an optimal value in the form of the minimum total cost of shortages and the minimum number of assignments in time blocks and tasks that are unwanted by volunteers. The implementation results show that the model can be implemented in disaster cases in an area.
Keyword: assignment, fuzzy, Fuzzy Goal Programming, volunteer

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