Judul: Teknik pemanfaatan anakan alam puspa (Schima Wallichii (DC.) Korth.) di hutan pendidikan Gunung Walat (HPGW), Sukabumi
Abstrak: The objectives of this study were learning the techniques of utilizing puspa (Schima wallichii (DC.) Korth.) wildlings in Gunung Walat (GWUF), Sukabumi, as planting stocks and studying the respond of these wildlings which were utilized as bare root (uprooted) plants and earth balled plants. Experiment for this purpose was conducted as completely randomized design (CRD) with six treatments, namely: bare root (uprooted) plants with plant heights of 2−29 cm, bare root (uprooted) plants with plant heights of ≥ 30 cm, bare root (uprooted) plants with initial plant heights of 2−29 cm accompanied with soil loosening, bare root (uprooted) plants with initial plant heights of ≥ 30 cm accompanied with soil loosening, earth balled plants with initial plant height of 2−29 cm, and earth balled plants with initial plant height of ≥ 30 cm. Increment of height and number of leaves for earth balled plants with initial height of ≥ 30 cm showed the best respond as compared with other treatments. Plants with initial height of ≥ 30 cm possessed greater biomass and possessed more water and are therefore more resistant toward desiccation. However, there were no significant difference between the six techniques (treatments) of utilizing puspa wildlings in terms of survival percentage, percentage of desiccated leaves, and percentage of shed leaves.
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Judul: Studi Tehnik Pendugaan Potensi Tegakan Hutan Puspa (Schima waliichii) dengan Simple Systematic Sampling with Random Start dengan Unit Contoh Six Tree Sampling dan Circular  Plot (Studi Kasus di Hutan Pendidikan Gunung Walat Sukabumi)
Abstrak: Hutan adalah salah satu sumber daya alam yang menguasai hajat manusia. Manusia akan selalu berurusan dengan hutan baik secara langsung maupun tidak langsung. Kegitana pengolahan hutan salah satu bahan dasar untuk penyusunan rencana pengusahaaan hutan yang cermat adalah data potensi hutan yang tepat, baik secara kuantitas maupun secara kualitas dalam kawasan hutan yang dikelola. Data tersebut dapat diperoleh melalui kegiatan inventarisasi hutan. Hutan Pendidikan gunung Walat (HPGW) yang pengelolaannya diserahkan pada IPB khususnya Fakultas Kehutanan sebagai lembaga pendidikan tinggi, sudah sewajarnyalah jika mengarahkan Gunung Walat sebagai hutan percontohan yang mencakup hutan lindung, produksi dan rekreasi. Tegakan puspa merupakan salah satu tegakan yang ada pada HPGW, ehingga data tentang potensinya perlu diketahui.Penelitian ini mengambil lokasi di petak Tegakan Puspa Murni di HPGW-Sukabumi. Kegiatan penelitian dilaksanakan pada bulan Mei-September 2006. Obyek penelitian yang digunakan adalah tegakan puspa pada petak 6, petak 22 dan petak 38 dengan total luas area 64 Ha. Alat yang digunakan dalam penelitian ini adalah kompas, haga hypsometer, pita keliling/pita phiband, alat pengukur jarak (meteran), tambang, peta kerja skala 1:5000, tally sheat, kalkulator dan alat tulis pada area ini dilakukan pengambilan contoh dengan bentuk unit contoh konvensional dan bentuk unit contoh six tree sampling. Pengambilan contoh pada semua metode ini dilakukan dengan pola simple sampling with random start.
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Judul: Tinjauan Matematis pada Model Makroskopik dan Mikroskopik Arus Lalu-lintas
Abstrak: Traffic flow phenomenon can be described through mathematical model such as continuous dynamic model with an ordinary differential equation so that it can be solved with integral factors. In this paper three simple models of traffic flow are discussed, i.e, two macroscopic and one microscopic models. Macroscopic model formulates dynamics of the traffic flow that occurs on a large number of vehicles on a road. While the microscopic model explains drivers’ behavior in their interaction with other vehicles ahead, i.e, car-following model. This paper shows the existence of ordinary differential equation found in the traffic flow model and indicates some different representations in the context of the same model. It also reviews a simple model of traffic flow along a single link, which leads to some unexpected results, i.e, it can express the solution model in term of link outflows as well as trip time. In the microscopic model, simulation is done to illustrate the behavior of the drivers with a sensitivity coefficient as a benchmark parameter.
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