Judul: Study on spatio-temporal dynamics of weed communities in rice field landscape of Ciliwung-Cisadane watershed
Abstrak: The distribution of rice field landscape of Ciliwung-Cisadane Watershed through from lowland (in the down stream) until highland (in the upper stream). Gradually, the condition of rice field landscape in the lowland di fferent with in the highland. The differences of biophysical condition come to differ of weed composition growing. Weed problem always present as part of rice cultivation. Weed infestation cause to injury competition, so weed control is a necessity. Up to now, the planning of weed control strategy based on vegetation analysis are valued still often not too exactly. This is caused vegetation analysis no give enough information about the changing of weed communities of different time and its distribution of various locations as well as the influential factors in a regional scale with vries biophysical conditions. The objectives of this research were (1) to analyze the pattern of rice field distribution in Ciliwung-Cisadane Watershed, (2) to analyze the composition of weed community and dominant weed species along with their variation through season/stage of rice crop growth, (3) to analyze the distribution of weed dominan species and weed infestation level together with their changing through season/stage of rice crop growth, (4) to analyze the correlation among factors which were influential of weed infestation, rice production, and efficiency of rice farming, and (5) to formulate the supposition models the effect of physical environments, cultivation practices, socio-economics and accessibilities to weed infestation level, rice production, and efficiency of rice farming.
Keyword: Distribusi lahan sawah, Distribusi jenis gulma, Usahatani padi sawah

Judul: Analisis Perubahan Penutupan dan Penggunaan Lahan di DAS Ciliwung dan Cisadane
Abstrak: In this study, we examined the spatial and temporal patterns of land use and cover change (LUCC) and population change dynamics in the Northern Watershed of West Java. Those watersheds are Ciliwung and Cisadane. The objective of this study was to quantify the drivers of LUCC using long-term Landsat image data from 1978, 1995 and 2012. We found the changing of LUCC, especially in those watersheds boundary still continues since the growth of society and economy are increasing. Therefore, it needs a significance breakthrough to figure out the driver of LUCC of changing by using an easy and smart technology of Geographical Information System (GIS). A GIS gives the information about the driver of LUCC and at the same time monitoring the enviromental for minimizing some efforts of direct observation. The results show that the changing in those watersheds following several processes and in the end changed into settlements and dry lands, predominantly. The predicted drivers are number of population, density of population, soil type, slope, precipitation, and distance to city. The logistic regression analysis (LRA) by using forward stepwise model show that those drivers inclined to affect LUCC, respectively.
Keyword: Bogor Agricultural University (IPB), watershed management, Landsat image, Cisadane Watershed, Ciliwung Watershed

Judul: Sifat optik dan sifat listrik diode schottky film Barium Titanat (BaTiO3) berstruktur emas - BaTiO3 (Metal – ferroelektrik)
Abstrak: Diode Schottky (emas - BaTiO3) berhasil dibuat dengan ditumbuhkan di atas permukaan interdigital electrode berbahan emas(Au) menggunakan metode Chemical Solution Deposition (CSD) . Film BaTiO3 dibuat dengan proses annealing pada suhu 400oC dengan variasi holding time annealing 4 jam dan 10 jam. Karakterisasi sifat optik diode Schottky dilakukan menggunakan UV-Vis Spektrofotometer untuk memperoleh nilai energi gap Film BaTiO3. Nilai energi gap BaTiO3 pada dua perlakuan holding time annealing 4 jam dan 10 jam sebesar 3.27 eV dan 3.21 eV dan nilai energi gap tersebut termasuk dalam kategori semikonduktor. Karakterisasi sifat listrik diode Schottky dilakukan menggunakan LCR Meter yang didapatkan nilai konduktivitas listrik pada Holding time annealing 10 jam lebih besar daripada 4 jam. Kemudian, didapatkan nilai impedansi yang menunjukkan bahwa pada holding time annealing 4 jam lebih besar daripada holding time 10 jam. Didapatkan pula nilai konstanta dielektrik yang menunjukkan pada waktu holding time annealing 4 jam lebih besar daripada 10 jam.
Keyword: Barium titanat, diode schotty, ferroelektrik, sifat optik, sifat listrik, emas, metal