Judul: Improvement of Factory Layout and Design of Chitin Production SOP in CV. Bio Chitosan Indonesia
Abstrak: CV. Bio Chitosan Indonesia merupakan perusahaan yang berfokus di bidang pengolahan cangkang hewan laut dengan memproduksi kitin dan kitosan yang berkualitas. Pabrik ini baru berdiri dan masih memerlukan perbaikan dan evaluasi dari sistem kerjanya, khususnya tata letak pabrik yang belum teratur, sehingga menimbulkan adanya backtracking, tidak adanya SOP (Standard Operating Procedure) yang terstandar serta lingkungan kerja yang cukup berbahaya. Penelitian ini bertujuan untuk memperbaiki tata letak area kerja dan fasilitas pabrik yang dapat meningkatkan efisiensi pergerakan aliran material, serta merancang SOP produksi kitin. Perbaikan tata letak dilakukan mengikuti metode SLP (Systematic Layout Planning) dengan software BLOCPLAN90. SOP dirancang melalui diskusi, observasi, dan studi literatur. Perbaikan tata letak yang dilakukan menghasilkan total jarak yang lebih pendek dari tata letak awal dengan peningkatan efisiensi pergerakan material sebesar 32,97%. Beberapa perbaikan tata letak fasilitas direkomendasikan pada 9 area kerja. SOP dirancang dalam bentuk diagram alir dengan memperhatikan titik kritis dan pengendalian potensi bahaya di setiap tahapan proses, sehingga SOP yang dirancang memperhatikan kualitas mutu produk dan keselamatan kerja pekerja., CV. Bio Chitosan Indonesia is a company focused on processing shells of marine animals by producing quality chitin and chitosan. This factory is just established and still requires improvement and evaluation of its work system, especially the irregular factory layout which resulted in backtracking, the absence of standardized SOPs (Standard Operating Procedures), and a fairly dangerous work environment. This research aims to improve the layout of workspace and factory facilities that can increase the efficiency of material flow movement and design SOPs for chitin production. Layout improvements are done with the SLP (Systematic Layout Planning) method using BLOCPLAN90 software. SOPs are made through discussion, observation, and literature study. The layout improvements resulted in a shorter total distance than the initial layout with an increase in material movement efficiency by 32,97%. Some improvements to the layout of the facility were recommended in the 9 workspaces. SOPs were designed in the form of flowcharts by paying attention to critical points and controlling potential hazards at each stage of the process so that designed SOPs have paid attention to product quality and the safety of workers.
Keyword: chitin, layout, SOP, workspace

Judul: Design of Layout Improvement in Food Canning Factory Sharing
Abstrak: PT Kita Satu Rasa sebagai suatu factory sharing memiliki tantangan untuk menyediakan produk pangan yang berkualitas melalui proses produksi yang lancar, aman, dan bermutu. Namun, dalam pengamatan langsung masih ditemukan permasalahan utamanya pada kondisi tata letak yang dapat memengaruhi kelancaran proses produksi. Permasalahan yang dihadapi PT Kita Satu Rasa pada tata letak pabrik pengalengan saat ini yaitu penempatan aktivitas yang terpencar, aliran backtracking, dan ketidaksesuaian allowance pada area kerja. Penelitian ini bertujuan mengidentifikasi kondisi awal tata letak pabrik pengalengan dan menganalisis perbaikan tata letak pabrik pengalengan. Perancangan perbaikan tata letak dilakukan dengan metode SLP (Systematic Layout Planning) dan algoritma CORELAP (Computerized Layout Planning). Tata letak usulan pada pabrik pengalengan menghasilkan peningkatan efisiensi jarak perpindahan material sebesar 28,89% berdasarkan hasil simulasi., PT Kita Satu Rasa, as a sharing factory, has challenges providing quality food products through a safe and quality production process. The problems PT Kita Satu Rasa faced in the current layout of the canning factory are the placement of scattered activities, backtracking flow, and inappropriate allowances in the work area. However, in direct observation, the main problem is still found in the layout conditions that will affect the safety and quality of the final product. This study aims to identify the initial conditions and analyze the improvement of the cannery layout. The layout improvement design uses the SLP (Systematic Layout Planning) method and the CORELAP (Computerized Layout Planning) algorithm. The proposed layout of the cannery increased the efficiency of the material transfer distance by 28.89%, based on the simulation results.
Keyword: CORELAP, Factory sharing, Pengalengan, Tata letak

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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