Judul: Sistem Pakar Penentuan Kelayakan Usaha Budi Daya Pembenihan Ikan Gurami
Abstrak: This study develops an expert system that is designed to record and use the knowledge, experience, and expertise of the experts in the field of aquaculture feasibility to determine the feasibility of gouramy hatchery. The utilized inference method is Tsukamoto Fuzzy Inference System (FIS) with travezoid curve membership functions. The weighted average is used as the defuzzification method. The parameters used are fuzzy and non-fuzzy. The fuzzy parameters are temperature, amonia (NH3), disolved oxygen (DO), alkalinity, Puissance negative de H (pH), pond water depth, and hardness. The non-fuzzy parameters are the forms of business entities, business licenses, benefits to society, consumer behavior, and the return cost ratio (R/C ratio). Seven fuzzy input parameters has 11 rules for technical scale that are determined by experts to produce the business analysis output. The develoved expert system has been able to analize the feasibility of gouramy hatchery with a capability close to that of expert
Keyword: weighted average., membership functions, hatchery, fuzzy inference system, defuzzification

Judul: Sistem Pakar Penentuan Kelayakan Usaha Budi Daya Pembesaran Ikan Gurami
Abstrak: Growth-out is the final segment in gouramy culture which results in consumption-sized gouramy with a minimum weight of 500 g/fish. This research develops an expert system designed to record and use the knowledge, experience, and expertise of aquaculturist to determine the feasibility of gouramy growth-out culture in accordance with technical, legal, social, cultural, and financial aspects. The utilized inference method is Tsukamoto Fuzzy Inference System (FIS) with trapezoid curve. Meanwhile, weighted average is used as the defuzzification method. Seven parameters, namely technical temperature, ammonia (NH3), disolved oxygen (DO), alkalinity, puissance negative de H (pH), water depth, and height are the fuzzy parameters which are then processed with 11 rules defined by expert to analyze the result of the qualification. This expert system is able to analyze the feasibility of gouramy growth-out culture and already approaching the capability of expert.
Keyword: growth-out., fuzzy inference system (FIS), feasibility

Judul: Test of Optical and Electrical Properties of Thin Film Strontium Titanate (SrTiO3) Doped with Lanthanum Oxide (La2O3) with 0%, 2%, 4%, and 6% Exposure Variations
Abstrak: Film tipis Stronsium titanat (SrTiO3) telah berhasil dibuat dengan menggunakan metode Chemical Solution Deposition (CSD) dan Spin Coating. Dalam penelitian ini telah dibuat film tipis Stronsium titanat (SrTiO3) didadah Lantanum oksida (La2O3) dengan variasi pendadah 0%, 2%, 4%, dan 6%. Film tipis tersebut ditumbuhkan di atas substrat silikon tipe-p (100). Film tipis SrTiO3 melalui tahap annealing pada subu 850ºC ditahan selama 8 jam dengan kelajuan kenaikan suhu sebesar 1,67 ºC/menit, kemudian mengalami proses pendinginan 12 jam. Film tipis SrTiO3 didadah La2O3 (0%, 2%, 4%, 6%) dikarakterisasi sifat optiknya dengan menggunakan Spektrofotometer UV-Vis dan sifat listriknya dengan menggunakan LCR meter. Energi bandgap yang dihasilkan film tipis yang dibuat pada penelitian ini secara berurutan adalah 3,48 eV; 3,23 eV; 3,75 eV; dan 3,18 eV. Nilai konduktivitas film tipis SrTiO3 mengalami kenaikan siring dengan bertambahnya intensitas cahaya yang diberikan. Uji sensitivitas film tipis menghasilkan nilai perubahan tegangan (respons) yang dihasilkan menurun seiring dengan berkurangnya konsentrasi pendadah.
Keyword: CSD, Energi Bandgap, Konduktivitas, LCR Meter, Spektrofotometer UV-Vis