Judul: Perancangan Sewage Treatment Plant (STP) sebagai  Implementasi Aspek Green Building pada Apartemen Samasta  Mahata Margonda Depok
Abstrak: Peningkatan pertumbuhan penduduk menyebabkan naiknya jumlah limbah cair domestik yang berasal dari kegiatan rumah tangga dan perkantoran. Konsep green building harus diterapkan terutama aspek konservasi air agar penggunaan air dapat berjalan dengan optimal. Salah satu upaya untuk mengolah air limbah domestik di Apartemen Samasta Mahata Margonda adalah penggunaan Sewage Treatment Plant (STP). Penelitian ini bertujuan merencanakan STP, melakukan identifikasi potensi penggunaan kembali air hasil pengolahan, serta melakukan penilaian green building kategori konservasi air. Konsentrasi akhir dari parameter air limbah BOD, COD, TSS, dan ammonia setelah melewati unit pengolahan sebesar 0,54 mg/L, 2,52 mg/L, 10,72 mg/L, dan 4,79 mg/L sehingga sudah memenuhi baku mutu standar aliran kelas 2 untuk penggunaan kembali air daur ulang. Penghematan air yang dapat dicapai untuk siram tanaman dan siram toilet adalah 56% atau 156,5 m3/hari dari total kebutuhan air bersih 276 m3/hari., Population growth due to urbanization has resulted in an increase in the amount of domestic liquid waste originating from household and office activities. The concept of green building must be applied, especially aspects of water conservation so that water utilization can run optimally. One of the efforts to treat domestic wastewater at the Samasta Mahata Margonda Apartment is to use a Sewage Treatment Plant (STP). This study aims to plan a STP, to identify the potential for reuse of treated water, and to conduct a green building assessment in the category of water conservation. The final concentrations of wastewater parameters BOD, COD, TSS, and Ammonia after passing through the treatment unit were 0,54 mg/L, 2,52 mg/L, 10,72 mg/L, and 4,79 mg/L so that they still meet the requirements quality standard for class 2 stream for reuse of recycled water. Water savings that can be achieved for watering plants and flushing toilets are 56% or 156,5 m3/day of the total clean water requirement of 276 m3/day.
Keyword: Greenship, konservasi air, limbah cair domestik, sewage treatment plant

Judul: Implementasi Prinsip Green Building pada Perencanaan Apartemen Jasmine Park Dramaga Bogor Menggunakan Sumur Resapan
Abstrak: Land-use change due to development continues to increase so that it impacts decreasing infiltration area and increasing surface water runoff. One of the solutions to reduce runoff is to apply green building concepts using infiltration wells. This study aims to design infiltration wells based on greenship new building 1.2 to reduce the volume of rainwater runoff and STP runoff water that has met the quality standards at Jasmine Park Dramaga Bogor Apartment, as well as assessing the green building category of land use at design recognition stage. The results of planning rainwater absorption wells in accordance with the greenship new building version 1.2 showed that it is necessary to make circular infiltration wells with a diameter of 1,5 m and a depth of 5 m. It takes as many as 34 units with an effectiveness value of 99.1%. While the infiltration well for STP effluent water is required as many as 44 units with 100% effectiveness. The result of green building assessment in The Jasmine Park Apartment plan for land use category has reached 64% (11 out of 17 points)., Perubahan tata guna lahan akibat pembangunan terus meningkat sehingga berdampak terhadap penurunan daerah infiltrasi dan peningkatan limpasan air permukaan. Salah satu solusi untuk mengurangi limpasan air permukaan adalah dengan menerapkan konsep green building menggunakan sumur resapan. Penelitian ini bertujuan merancang sumur resapan berdasarkan greenship new building versi 1.2 untuk mengurangi volume limpasan air hujan dan air limpasan efluen STP yang telah memenuhi baku mutu pada Apartemen Jasmine Park Dramaga Bogor, serta melakukan penilaian green building kategori tepat guna lahan pada tahap pengakuan desain. Hasil perencanaan sumur resapan air hujan sesuai dengan greenship new building versi 1.2 menunjukkan bahwa perlu dibuat sumur resapan berbentuk lingkaran dengan diameter 1,5 m dan kedalaman 5 m, dibutuhkan sebanyak 34 unit dengan nilai efektifitas sebesar 99,1%. Sedangkan sumur resapan untuk air efluen STP diperlukan sebanyak 44 unit dengan efektifitas 100%. Hasil penilaian green building pada perencanaan Apartemen Jasmine Park kategori tepat guna lahan mencapai 64% (11 dari 17 poin).
Keyword: ASD, effectivenees, GBCI, infiltration wells, water

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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