Judul: Transpirasi Beberapa Jenis Anakan Hutan Kota pada Kondisi Lingkungan yang Berbeda
Abstrak: Worse quality of city environment is the result of various community activities of the city. Waterlogging and increase in air temperature are some form worse quality of the city. Urban forest beneficial as water catchment area and natural refrigerant the city’s air through a physiology process of trees, namely transpiration. This research aims to know influence of air temperature, relative humidity and light intensity against the transpiration of rain tree (Samanea saman), walnut (Canarium commune), and simpur (Dillenia indica) seedlings in two different environment condition and also to know transpiration ability of rain tree, walnut, and simpur seedlings. Research was done in K. H. Sholeh Iskandar Street and in KSHE Arboretum. Research had been conducted for two months in the field and Laboratory with gravimetric technique to measure transpiration ability of seedlings. The result shows that seedlings transpiration in K. H. Sholeh Iskandar Street were higher than those in Arboretum KSHE. Highest transpiration per leave and per stomata owned by walnut seedling, however the highest transpiration per seedling individu owned by rain tree seedling.
Keyword: Bogor Agricultural University (IPB), walnut., urban forest, transpiration, simpur, rain tree

Judul: Daya Rosot Karbondioksida Oleh Beberapa Jenis Tanaman Hutan Kota di Kampus IPB Darmaga
Abstrak: The increase of temperature in urban area is indirectly caused by the increase of Carbon Dioxide (CO2) concentration in the atmosphere. The increase is caused by land cover alteration and high amount of human activities which uses fossil fuel. The existence of urban forest is one of the ways to coupe the increase of CO2 concentration in the urban atmosphere. Through photosynthesis process, CO2 gas is absorbed by various plants in urban forest and afterwards being released as Oxygen (O2). To control or reduce the concentration of CO2 effectively, in the establishment of urban forest, selection of plants which have maximum ability in reducing CO2 concentration needs to be done. The objectives of this research are to obtain data CO2 sink ability of 15 urban forest plant species in Bogor Agricultural University and to obtain data about the plant species that has the effective CO2 sink ability among the plants which are measured. The measuring of CO2 sink ability was conducted using carbohydrate method. CO2 mass is obtained by converting carbohydrate mass produced in photosynthesis. Other data taken include leaf area and the number of leaves. The higher the leaf area, the higher CO2 sink ability of a leaf. The higher number leaf of a tree, the higher CO2 sink in a tree. The CO2 sink ability of 15 plant species in cm2 of leaf area are (g CO2/cm2/hour): M. caesia 3,793 x 10-4; D. indica 2,180 x 10-4; B. racemosa 1,600 x 10-4; S. campanulata 1,249 x 10-4; M. champaca 1,176 x 10-4; S. malacense 0,820 x 10-4 ; B. capitella 0,805 x 10-4; C. cauliflora 0,734 x 10-4; V. pubescens 0,669 x 10-4; C. inophyllum 0,629 x 10-4 ; M. ferrea 0,479 x 10-4; A. moluccana 0,357 x 10-4; A. dammara 0,268 x 10-4-; and G. dulcis 0,089 x 10-4. The CO2 sink ability of 15 plant species in urban forest in order from the highest are D. indica, M. caesia, S. campanulata, C. inophyllum, B. racemosa, V. pubescens, M. ferrea, C. cauliflora,B. capitella, G. dulcis, M. champaca, S. malacense, A. moluccana, and A. dammara. Keywords: carbon dioxide sink, urban forest.
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Judul: Konstruksi Hukum Grup Kurva Eliptik Atas F3m
Abstrak: Elliptic curves upon F3m can be divided in two cases, i.e. supersingular and nonsupersingular case. Based on group laws on elliptic curves, a new arithmetic upon F3m can be formulated as an addition process of two random points on the curve. This addition process can then be applied to the ElGamal algorithm.
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