Judul: Sistem deteksi dini dan pencegahan penyakit pada ternak unggas secara online
Abstrak: Disease control on poultry farming can be one determining factor to get the economy success. A sick poultry will make the weight gain decreased, and result in economic losses. Poultry disease can be detected faster by the symptom shown by poultry itself. This Online Poultry Early Detection and Illness Prevention Information System (OPEDIPIS) could help farmer to detect the illness before its outbreak. This system diagnoses the desease by enter the symptome of the desease to computer system, and then the system compute the possible illness of the poultry based on the symptom that had been input to the system data base. The OPEDIPIS was developed using System Development Life Cycle Method (SDLC). SDLC consisted of 5 systems, they were investigation, analyze, design, implementation, and maintaining systems. The system is good for some disease that have symptoms in the vital body but it cant be used to cure the illness, this system can only recommend some prevention method to help stop spreading the disease.
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Judul: Development Web Based Diagnosis Expert System of Chicken Disease.
Abstrak: Disease is one of many obstacles that could reduce the productivity of poultry. Recognizing early symptoms of the disease, knowing the source of the cause and performing a variety of efforts for prevention are very important to increase the productivity of the poultry. This study is a continuation of previous study done by Haryanto (2006). The system developed by Haryanto still has some limitations : such as desktop-based systems, could not be found division of users to access system, and it’s not using the database so there is no facility for editing disease symptoms. The present availability of computer technology and an easiness of obtaining it has provided great possibility to apply an information system for overcoming the problems mentioned above. For this purpose, Diagnosis Expert System of Chicken Disease was developed in the form of a web based application. Moreover, this study evaluates the effect of changing the membership functions of input variables on the defuzzification results. This system is designed and built using System Development Life Cycle (SDLC) method which consists of 5 stages, investigation systems, system analysis, system design, system implementation, and maintenance system. The results of this research is a chicken diasease diagnosis expert system, a web based application. In the system, the decision making is based on two aspects, which are non fuzzy symptoms is using decision table and for symptoms fuzzy is using Fuzzy Inference System. Keywords : expert system, membership function, defuzzification, system development life cycle.
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Judul: Transisi Fasa Materi Hadronik ke Materi Kuark pada Inti Bintang Neutron.
Abstrak: Bintang neutron terdiri dari beberapa lapisan yang disusun oleh materi nuklir yang berbeda dengan kerapatan yang semakin tinggi ketika mendekati pusat bintang. Inti luar bintang neutron disusun oleh materi hadronik (nukleon, lepton, dan hyperon), sedangkan inti dalam bintang neutron disusun oleh kuark-kuark bebas (up, down, strange) yang saling berinteraksi. Tujuan penelitian ini adalah mempelajari bagaimana transisi dari inti luar ke inti dalam bintang neutron dengan menggunakan pendekatan RMF (Relativistic Mean Field) untuk materi hadronik dan CIDDM (Confined Isospin Density Dependent Mass) untuk materi kuark. Tekanan transisi diperoleh ketika potensial kimia barion materi hadronik dan materi kuark bernilai sama. Nilai tekanan transisi dengan parameter SU6-TM1 sekitar 87 MeV/fm3 dan diperoleh massa maksimum bintang neutron yaitu 1.92M dengan jari-jari sekitar 8.62 km. Nilai tekanan transisi dengan parameter SU6-G2 sekitar 53 MeV/fm3 dan massa maksimum bintang neutron yaitu 1.88M dengan jari-jari sekitar 8.16 km. Jenis transisi fasa adalah orde satu ditandai dengan diskontinuitas dalam kerapatan energi (adanya mixed phase). Parameter-parameter pada model nuklir yang digunakan menyebabkan perbedaan kekakuan persamaan keadaan (EOS) dari materi hadronik dan materi kuark sehingga nilai tekanan transisi dari fasa hadronik ke fasa kuark juga berbeda.
Keyword: bintang neutron, persamaan keadaan, transisi fasa