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: Penjadwalan Perawat Menggunakan Fuzzy Goal Programming: Studi Kasus di Rumah Sakit Hasanah Graha Afiah Depok
Abstrak: Rumah sakit seringkali masih menggunakan cara manual dalam menyelesaikan masalah penjadwalan perawat. Cara seperti ini kurang efisien dan rentan terhadap kesalahan saat melibatkan jumlah perawat yang relatif besar. Tujuan karya ilmiah ini ialah memodelkan masalah penjadwalan perawat menggunakan metode fuzzy goal programming. Fungsi objektifnya yaitu memaksimumkan derajat kepuasan fungsi keanggotaan dari setiap fungsi tujuan fuzzy. Berdasarkan pemodelan ini diperoleh jadwal perawat dengan jumlah hari kerja dan jumlah shift yang didapat setiap perawat yang lebih baik dan tidak ada pola libur masuk libur. Kata kunci: fuzzy goal programming, pemodelan, penjadwalan, perawat., Hospitals often still use manual methods in solving nurse scheduling problems. This method is less efficient and prone to errors when involving a relatively large number of nurses. The purpose of this scientific paper is to model the problem of scheduling nurses using the fuzzy goal programming method. The objective function is to maximize the degree of satisfaction of the membership function of each fuzzy goal function. Based on this modeling, nurses' schedules with the number of working days and the number of shifts each nurse gets are better and there is no pattern of holidays in the holidays. Keywords: fuzzy goal programming, modeling, nurse, scheduling.
Keyword: fuzzy goal programming, modeling, nurse, scheduling

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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