Judul: Evaluation of green city concept implementation in Surabaya
Abstrak: Pertumbuhan suatu kota diiringi oleh perkembangan ekonomi, sosial, dan ekologi. Perlu adanya keseimbangan terhadap pertumbuhan antar aspek demi menciptakan perkembangan kota yang modern, ramah lingkungan, dan berkelanjutan. Kota Surabaya merupakan kota terbesar kedua di Indonesia, dan berhasil meraih banyak penghargaan yang bertemakan lingkungan seperti diantaranya penghargaan Adipura, Adiwiyata, Taman Kota Terbaik, dan lain sebagainya. Permasalahan umum yang dihadapi oleh kota Surabaya diantaranya sampah, krisis energi, degradasi lingkungan dan pemukiman kumuh. Tujuan dalam penelitian ini adalah memberi penilaian terhadap kinerja Kota Surabaya atas usahanya menerapkan konsep Kota Hijau dengan melihat peran pemerintah, pihak swasta, dan masyarakat. Penelitian ini menggunkan metode Asian Green City Index, yang memiliki delapan kategori evaluasi kinerja kota dalam menerapkan konsep Kota Hijau yaitu Energy and CO2, Land use and Buildings, Transport, Waste, Water, Sanitation, Air Quality, dan Environmental Governance. Hasil evaluasi menunjukan bahwa Kota Surabaya dalam menerapkan konsep Kota Hijau masuk kedalam kategori performa rata-rata dengan nilai rata-rata persentase sebesar 65.5% dan tingkat Index of Happiness masyarakat kota 70% sangat bahagia, 25% bahagia, dan 5% kurang bahagia., The growth of a city is accompanied by development of economy, social, and ecology. A balanced between the growth of urban development aspects is needed in creating a modern, environmental friendly, and sustainable city. Surabaya is the second largest city in Indonesia, and has won many awards with enviromental concept such as Adipura, Adiwiyata, Taman Kota Terbaik etc. The common problems of large cities such as waste, energy crisis, environmental degradation, and urban sprawl. The purpose of this study is to assess the performance of Surabaya City for its efforts to implement the Green City concept by looking at the role of the government, private sector, and community. This research was using the Asian Green City Index as the method which has eight categories of performance evaluation of the city in applying the concept of Green City: Energy and CO2, Land use and Buildings, Transport, Waste, Water, Sanitation, Water Quality, and Environmental Governance. The evaluation results show that in applying the concept of the Green City, Surabaya City is in above average rank, based on the category performance with an average persentase 65.5%, moreover the level Surabaya’s society happiness based on the Index of Happiness is 70% very happy, 25% happy, and 5% less happy.
Keyword: asian green city, berkelanjutan, evaluasi, index of happiness, kota hijau, modern

Judul: Evaluasi Penerapan Konsep Kota Hijau di Kota Jakarta
Abstrak: Green city is one of the concept for urban development towards the sustainable city. There are eight ideal indicators into a green city concept in Indonesia; green planning and design, green open space, green building, green waste, green transportation, green water, green energy, and green community. Jakarta is one of the major cities in Indonesia who have some urban problems such as; urbanization, traffic problem, flood, and also waste problem. The purpose of this study is to identify the application of the green city concept using gap analysis and evaluate the application of the concept using scoring method. The results from the formulation showed that Jakarta have related problems to eight green city indicators. The analysis showed that there is a gap between the ideal with actual condition in the green city immpelementation. Gaps caused by the application of green city concept is still in the early stages. The evaluation phase resulted that green transportation has the highest value of 50%, followed by green open space (45.83%), green planning and design (43.75%) green community (25%), green building (25%), green waste (25%), green water (12.50%), and green energy (10%).
Keyword: Jakarta, green city, gap analysis, evaluation

Judul: The Exploration of Discrete Logarithm over Finite Field GF(3m)
Abstrak: The security of many public~key algorithms is based on the problem of finding discrete logarithms. The generalized discrete logarithm problem is the following: given a finite cyclic group G of order n, a generator a of G, and an element fl E G, find the integer x, 0 ~ x ~ n - 1, such that 0: = fl. Algorithm for discrete logarithm problem focused on Menezes et al. (1997) that consist of exhaustive search algorithm, the baby-step giant-step algorithm, Pollard's rho algorithm, Pohlig-Hellman algorithm, and index-calculus algorithm. These algorithms are explorated to be used in discrete logarithm problem over finite field GF(3m ). The exploration also produces some algorithms, i.e. naif negative algorithm, baby-step mother-step algorithm, baby-step mother free-step algorithm, and baby-step free-step algorithm. All algorithms implemented using Maple 11. The Pohlig-Hellman and baby-step giant-step algorithms are efficient enough to be used in discrete logarithm problem over finite field GF(3m ) for m < 20.
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