Judul: Sistem supervisory control enviromental on model broiler closed house
Abstrak: Indonesia was a tropical country with high ambient temperatures for broilers since daily temperature reaches an average daily temperature of 360C (maximum) and 320 C (minimum); whereas the optimal temperature for broilers was in the range of 28-300C. Therefore, midle or large scale broiler industries have been using a control system to maintain the optimal temperature within a broiler house. Therefore, the role of a control system for regulating environmental parameters, not only temperature but also humidity, light intensity, and amonia content level, was very critical and relevant for better broiler production.The most important factors of comfort in broiler closed house including temperature, humidity, ammonia. Purpose were (1) designing the supervisory control system environmental parameters temperature, humidity and ammonia in broiler closed house, (2) assess the environmental characteristics of the parameters of temperature, humidity and ammonia in broiler closed house, (3) a model of environmental parameters of temperature, humidity and ammonia in the broiler closed house, (4) determine the optimal conditions supervisori control response parameter temperature, humidity and ammonia in broiler closed house, (5) the integration of environmental parameters supervisori control temperature, humidity and ammonia according to optimal conditions of control, knowledge of poultry and knowledge appropriate control environment in broiler closed house, (6) interconnect supervisory control environmental parameters temperature, humidity and ammonia in the broiler closed house in the form of software (software prototype) that can control one, two or three broiler closed house were connected to the computer network with remote with parallel computing. System of supervisory control for broiler closed house was a user interacts with the supervisory system to perform selection or determination of control modes, controlled parameters and optimality criteria for a certain poultry cultivated in a set of poultryhouses. Afterwards, the user preference specifications are passed to the Supervisory Control Engine (SCE) that performs the main supervisory computation scenario by utilizing the knowledge-base (control, climatic, broiler, and I/O knowledge). The SCE then produces set of control instructions to array of controllers that directly control and monitor a set of broiler closed house.The Control Knowledge-Base was a knowledge repository of various control methodologies, constraints, tools, and requirements. The Climatic knowledge-base stores all information about climatic parameters and characteristics. The poultry knowledge-base was a knowledge repository of poultry requirements, poultry types and characteristics. The I/O Knowledge-Base stores all relevant characteristics and usage requirements of I/O devices (sensors, transducers and actuators) that may be involved in a certain control scenario.The data used in this study included primary and secondary data. Primary data (floors, walls, rooms, and roof temperature) were obtained from measurements using an electronic measuring device. Secondary data (temperature, humidity, irradiation) was obtained from reports provided by BMG Bogor, including data processing model of moving heat broiler houses closed, predictive control parameters temperature, humidity and ammonia in Computational Fluid Dynamics (CFD), the results of mathematical modeling of temperature, humidity and ammonia obtained transfer function and the simulated supervisori control was ON- OFF control of Fuzzy Logic PID and ANFIS in the integration of one, two, three modes of control integration and interconnection networks in parallel computer simulations on
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Judul: Penembangan Sistem Pemantauan dan Kendali Suhu pada Model Kandang Closed House
Abstrak: Keberhasilan budidaya ayam broiler dapat dicapai melalui pengendalian lingkungan mikro kandang untuk menyangga kinerja genetik broiler. Pemantauan lingkungan mikro seperti temperatur, kelembapan relatif, dan kecepatan aliran udara dibutuhkan oleh sistem kendali untuk mempertahankan kondisi lingkungan closed house agar dapat mencegah terjadinya kegagalan budidaya dan juga dapat memberikan peringatan dini ketika terjadi kegagalan fungsi dari sistem pengendali. Penelitian ini bertujuan membangun model fisik kandang closed house yang dapat dikendalikan dan dipantau melalui jaringan internet secara real-time. Penelitian ini mengunakan model berskala 1:28 yang mewakili kandang closed house dengan ukuran 46 x 16 x 2 m. Model kandang dilengkapi dengan sistem pemantauan suhu dan sistem kendali dengan metode Proposional Integral Deferential (PID). Data sebaran suhu di dalam kandang dianalisis dengan metode kriging untuk mendapatkan gambaran distribusi suhu dalam bentuk kontur. Hasilnya adalah model yang dapat dipantau secara real-time menggunakan halaman web, informasi suhu di dalam model yang dijelaskan oleh grafik kontur suhu, dan kendali suhu yang memiliki galat pengendalian 0.46, 1.65, dan 6.76 oC
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, model, PID, real-time, suhu, Ayam broiler, Model kandang, DID, Metode kriging, Sistem pemantauan, Sistem kendali

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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