Judul: Landscape Planning for Citarum River to Support River Revitalization in Purwadana and Tanjungpura, Karawang
Abstrak: Kabupaten Karawang merupakan salah satu daerah di Indonesia yang memiliki pertumbuhan dan perkembangan perkotaan sangat dinamis. Keputusan Presiden Republik Indonesia Nomor 53 Tahun 1989 tentang Kawasan Industri menetapkan Karawang sebagai daerah pengembangan industri. Hal ini mempengaruhi peningkatan jumlah populasi masyarakat yang diikuti dengan pembangunan fasilitas dan infrastruktur. Masyarakat perkotaan cenderung memenuhi kebutuhan akan ruang dengan membangun tempat tinggal di area yang masih kosong, termasuk bantaran sungai. Masyarakat juga menggunakan bantaran sungai sebagai area perdagangan, perkantoran, dan sebagainya. Sungai yang mengalir di Karawang yaitu Sungai Citarum dengan bantaran sungai yang telah mengalami perubahan penggunaan lahan dari area sempadan menjadi permukiman. Pemerintah provinsi telah menetapkan program revitalisasi Sungai Citarum yang bernama “Citarum Harum”. Penelitian ini bertujuan membuat perencanaan lanskap Sungai Citarum untuk mendukung upaya revitalisasi Sungai Citarum segmen Purwadana dan Tanjungpura, Karawang. Metode yang digunakan dalam penelitian ini menggunakan analisis spasial dan kualitatif pada aspek fisik-biofisik dan aspek non fisik. Hasil analisis menunjukkan bahwa sebagian besar kualitas fisik dan biofisik kawasan berada dalam kondisi sangat kritis, sebagian dalam kondisi sedang, dan hanya sebagian kecil yang berada dalam kondisi baik. Berdasarkan hasil analisis, dalam rencana lanskap sebagian besar diperuntukkan sebagai kawasan konservasi air dan vegetasi, sedangkan sisanya untuk kawasan pendukung dan tempat rekreasi yang ramah lingkungan. Karawang Regency is one of the areas with high dynamic urban growth and development in Indonesia. Since 1989 Karawang has been designated as an industrial development area by the central government. This policy has affected the increasing number of population in the area as well as the construction of urban facilities and infrastructures. To meet the needs of housing, urban communities tend to build their dwellings in vacant land, including on riverbank. They also use the land for commerce, offices, and other usages. The river that flows in Karawang is Citarum River on which its riverbank has been occupied by people for settlement. The province government itself has established a revitalization program for Citarum River namely “Citarum Harum”. The objective of this study is to plan the landscape of Citarum River at Purwadana and Tanjungpura Villages to support the revitalization of Citarum River. The analysis in this study applied spatial and qualitative methods on the physical, biophysical and non-physical landscape elements. The analysis result showed that most of the area’s physical and biophysical qualities were in highly critical condition, some were in medium condition, and only a few in good condition. Regarding the analysis result, in the landscape plan the site was largely designated as water and vegetation conservation areas, while the rest was intended for supporting area and environmentally-friendly recreational spots., Karawang Regency is one of the areas with high dynamic urban growth and development in Indonesia. Since 1989 Karawang has been designated as an industrial development area by the central government. This policy has affected the increasing number of population in the area as well as the construction of urban facilities and infrastructures. To meet the needs of housing, urban communities tend to build their dwellings in vacant land, including on riverbank. They also use the land for commerce, offices, and other usages. The river that flows
Keyword: Citarum River, landscape planning, revitalization, riparian

Judul: Landscape Planning of Historic City Center of Karawang West Java
Abstrak: Karawang adalah sebuah kabupaten di Provinsi Jawa Barat yang memiliki nilai historis yang tinggi, dengan akar sejarah sejak tahun 414. Pusat Karawang Kota mengalami perubahan dari berbagai periode sejarah yang membuat kawasan terus berkembang dan bertransformasi menjadi lanskap bersejarah. Terlepas dari nilai-nilai sejarah kawasan, saat ini kawasan dikenal sebagai pusat perdagangan dan penyebaran agama Islam. Seiring dengan perkembanganya, kawasan pusat Karawang Kota menerima tekanan dari lingkungan sekitarnya termasuk pembangunan perumahan dan banjir karena daerah ini dekat dengan Sungai Citarum. Penelitian ini bertujuan untuk merumuskan rencana lanskap area bersejarah pusat Karawang Kota yang mendukung pelestarian sejarah dan kawasan yang berkelanjutan terhadap perkembangan kota. Metode analisis yang digunakan dalam penelitian ini adalah analisis spasial dan kualitatif pada aspek biofisik fisik, nilai kesejarahan, sosial budaya ekonomi, dan legal. Hasil analisis kesesuaian pengembangan kawasan berdasarkan nilai kesejarahan yang mempertimbangkan nilai kesejarahan-budaya dan kerentananya terhadap banjir, menunjukkan bahwa 33% sesuai, 28% cukup sesuai, dan 39% tidak sesuai. Berdasarkan hasil tersebut, rencana blok dikembangkan dengan membagi tapak menjadi 4 ruang, yaitu konservasi, pemajuan kesejarahan, pengembangan non sejarah, dan penyangga. Konsep perencanaan lanskap untuk kawasan ini adalah untuk menciptakan lanskap yang mengakomodasi kegiatan perkotaan dengan identitas dan karakteristik sejarah yang kuat dengan fungsi konservasi, interpretasi sejarah, dan pelayanan. Rencana lanskap yang dihasilkan dibentuk oleh rencana tata ruang, sirkulasi, fasilitas, dan vegetasi., Karawang is a regency in West Java Province that has historical significance, with historical roots dating back to 414 AD. City center of Karawang underwent changes from various historical periods that made this area continue to develop and has transformed into a historic landscape. Despite the historical values that this area has today, it known as the centers of commerce and the spread of Islam. As the landscape of the city center of Karawang continously grows, it receives tension from surrounding, including housing development and flood given this area is close to Citarum River. This study aims to formulate a landscape plan for the city center of Karawang historical area that supports historical preservation and sustainable area response to the urban development. The analysis method applied in this study spatial and qualitative analysis on the aspects of biophysical physical, historical value, socio-cultural economic, and legal. The analysis of suitability of the area development for a istoric city center which cinsiders historical-cultural significance and its susceptibility to flooding, indicated that 33% of the suitable, 28% quite suitable, and 39% unsuitable. Based on result, block plan was developed in thich it devideds the site into 4 spaces, namely conservation, historical promotion, non-historical development, and buffer. The landscape planning concept for this area was to create a landscape that accommodates urban activities with strong historical identity and characteristics with conservation, historical interpretation, and service functions. The resulted landscape plan was formed by spatial, circulation, facility and vegetation plan.
Keyword: perencanaan lanskap, lanskap kota sejarah, kerawanan banjir

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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