Judul: Penugasan Dosen di Masa Pandemi dengan  Mempertimbangkan Preferensi dan Pemerataan Beban Menggunakan Goal  Programming
Abstrak: Salah satu masalah penjadwalan adalah penjadwalan pengajar di dalam suatu institusi pendidikan. Terdapat beberapa pertimbangan pada penjadwalan pengajar yaitu ketersediaan waktu mengajar, ketersediaan mengajar secara online dan offline, preferensi mengajar dosen, kesesuaian materi yang diajarkan dengan bidang keahlian pengajar, sampai meratanya beban tugas mengajar bagi tiap pengajar. Salah satu penyelesaian masalah penjadwalan ini adalah dengan goal programming. Terdapat dua jenis kendala yang perlu ditinjau, yaitu hard constraints dan soft constraints. Dalam goal programming, akan diminimumkan peubah simpangan yang mengakibatkan soft constraints menyimpang dari nilai yang diharapkan. Model penjadwalan pengajar ini diaplikasikan pada data kasus penjadwalan dosen di Jurusan Matematika Universitas XYZ yang melibatkan penjadwalan untuk mata kuliah dua program studi sarjana, satu program studi magister dan 31 kelas paralel pada program tingkat pertama. Dari hasil implementasi, diperoleh penjadwalan yang memenuhi kendala-kendala dan meratakan beban mengajar dosen selama setahun akademik., One of the scheduling problems is the scheduling of teachers in an educational institution. There are several considerations in teacher scheduling, namely the availability of teaching time, the availability of online and offline teaching, lecturers' teaching preferences, the suitability of the material taught with the teacher's field of expertise, to the even distribution of the teaching task load for each teacher. One solution to this scheduling problem is goal programming. There are two types of constraints reviewed, hard constraints and soft constraints. In goal programming, we minimize the deviation variables, which causes soft constraints to deviate from the expected value. This teacher scheduling model is applied to the case data of lecturer scheduling at the Mathematics Department of XYZ University which involves scheduling for courses for two undergraduate study programs, one master study program and 31 parallel classes in the Joint first level program. The result of the implementation, is a scheduling satisfies the constraints and evens out the teaching load of the lecturers during the academic year.
Keyword: beban mengajar, goal programming, pandemi, penjadwalan dosen

Judul: Penjadwalan Kegiatan Mengajar Bimbingan Belajar Menggunakan Integer Linear Programming: Studi Kasus Bintang Pelajar Cikarang
Abstrak: Penjadwalan menjadi salah satu permasalahan yang sering dihadapi dalam penugasan suatu organisasi termasuk lembaga pendidikan, salah satunya yaitu bimbingan belajar. Penjadwalan ini melibatkan kombinasi antara banyaknya tenaga pengajar, mata pelajaran, kelompok belajar, sesi belajar, dan ketersediaan ruangan. Tujuan dari penelitian ini adalah memodelkan masalah penjadwalan dengan meminimumkan bobot sesi belajar setiap kelompok lalu mengimplementasikan model tersebut pada masalah penjadwalan kegiatan mengajar di Lembaga Bimbingan Belajar Bintang Pelajar Cikarang. Masalah tersebut diselesaikan menggunakan integer linear programming. Dengan bantuan software Lingo 19.0 diperoleh solusi optimal berupa jadwal kegiatan mengajar untuk periode waktu satu bulan yang memenuhi seluruh kendala., Scheduling is one of the problems faced in the assignment of an organization including educational institutions, one of which is tutoring. This scheduling involves the number of teaching staff, subjects, study groups, study sessions, and room availability. The purpose of this study is to model the scheduling problem by minimizing the weight of each group's study sessions and then implement the model on the scheduling teaching activities at Tutoring Institutions Bintang Pelajar Cikarang. That problem was solved using the integer linear programming method. With the help of Lingo 19.0 software, an optimal solution is obtained in the form of a teaching activity schedule for one month that satisfies all constraints.
Keyword: Bintang Pelajar Cikarang, integer linear programming, learning session weight, scheduling, tutoring institutioins

Judul: Ekstraksi dan Karakterisasi Kolagen dari Kulit Ikan Cobia (Rachycentron canadum)
Abstrak: Cobia fish (Ranchycentron canadum) was used for a culinary purpose, but their skin was waste part. Convert in a value added product like collagen was a good practice of post harvest management. Isolation of collagen from the skin of cobia fish (Rachycentron canadum) has been successfully conducted with three stages: first soaked in 0,05 M NaOH with a sample/solution ratio of 1:10 (w/v) for 6 hour, second soaked in 0,1 M acetic acid with a sample/solution ratio of 1:6 (w/v) for 2 hour, and third extraction with destilated water at temperature 40 ºC for 3 hour. The yield of collagen was 10,508%. The pH of collagen was 7,08; protein content 86,46%; moisture 11,08%; fat 0,26%; and ash contents 0,19%. Amino acid analysis of collagen revealed the high proline and glycine. FTIR spectra analysis revealed that collagen molecules had the compact triple helical structure stabilized mainly by the hydrogen bond. Fourier transform infrared (FTIR) spectroscopic study showed major absorption bands of amide A, B, I, II and III at 3310, 2932, 1651, 1543 and 1242 cm-1 respectively.
Keyword: FTIR, water ekstraction, cobia (Rachycentron canadum), collagen