Judul: Pola pergerakan harian dan penggunaan ruang katak pohon bergaris (Polypedates leucomystax) di Kampus IPB Darmaga
Abstrak: Penelitian mengenai pergerakan amfibi belum dilakukan di Indonesia, dikarenakan mahalnya alat radio-frckiltg. Polypedntes lezrcomystax merupakan salah satu jenis katak yang dapat beradaptasi dengan lingkungan yang terganggu. Sehingga merupakan model yang tepat untuk menelaah pola pergerakannya. Penelitian ini bertujuan: (1) Melakukan uji coba efektifitas penggunaan 2 macam metode yaitu metode tali dan pemberian cat, (2) Melakukan uji coba pengaruh penggunaan alat terhadap pergerakan P. leztcon~ystax, (3) Memetakan pola pergerakan P. 2euconystax, (4) Mendeskripsikan penggunaan ruang oleh P. lezrcomystmc di Kampus IPB Darmaga.
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Judul: Penggunaan metode spool track dalam menelaah pola pergerakan harian katak bertanduk (Megophrys montana) di Taman Nasional Gunung Gede Pangrango, Jawa Barat
Abstrak: Studies on amphibian movement have been reported abroad, including selection of appropriate method. However, there is only two study on amphibian movement reported in Indonesia by Sholihat (2007) and Muliya (2010). This study aims to 1) find suitable material for spool track that well suited with body weight of M. montana., 2) map daily movement patterns of M. montana and describe microhabitat use of M. montana in Gede Pangrango National Park. Research was conducted at Ciwalen and Cibereum. Four types of spool were tried to selected frogs and movements were observed every three hours for 72 hours. Data from observations were then analyzed descriptively and quantitatively. Seven frogs (3 males, 4 females) were observed for 72 hours, each using a spool weight under less than 10% of body mass and there are one male frog were successfully observed using a spool weight more 10% from their body mass. Results showed that suitable spool equipment materials differ for males and females according to their body mass. The best materials for the male frog are made by plastic straws and mica, while for female frog it is made from plastic and piece of carambol powder plastic. Kruskal Wallis test on eight frogs indicated that the movement of every 3 hours during the day are significantly differ between male frogs and female frogs (H = 0.296, df = 1, P> 0.05). While the movement of every 3 hours during the night were significantly differ between male frogs and female frogs (H = 0.000, df = 1, P <0.05). Kruskal Wallis test also shows the average male frog movement every 3 hours in the day and night were not significantly different (H = 0.000, df = 1, P <0.05) in which males did not move much. In the contrary, there is significant differences between day and night 3 hourly movement for female (H = 0.049. df = 1, p <0.05). Females tend to move more during the night compared to afternoon. From observation, it appears that most of the male and female frogs have similar activities during the day, which is sleeping in a protected area away from the sun, such as under leaf litter, rocks, and logs or burrowing in the wood in tree root holes. The purpose of burrowing aims to avoid drought and retain moisture. Observations on microhabitats use showed that most frogs used wet leaf litter during the day and night. Therefore plants as producer of leaf litter needs to be protected.
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Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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