Judul: Analysis of Home Range and Habitat Suitability Model of The Large Flying Fox (Pteropus vampyrus) in West Java Province
Abstrak: Kalong memiliki wilayah jelajah yang luas sehingga pemodelan distribusi spasial diperlukan untuk mengidentifikasi kesesuaian habitatnya. Satwa ini memiliki peranan penting bagi ekosistem meskipun dipercaya sebagai reservoir virus. Penelitian ini bertujuan untuk menganalisis pergerakan harian, wilayah jelajah, variabel yang berpengaruh terhadap kesesuaian habitat dan risiko virus nipah di Provinsi Jawa Barat. Titik perjumpaan dua individu kalong direkam pada tahun 2017-2018 menggunakan satellite telemetry ARGOS (Advanced Research and Global Observation Satellite). Analisis pergerakan harian dan wilayah jelajah menunjukkan hasil yang berbeda dari kedua individu dengan kecenderungan untuk tidak berpindah jauh dari titik awal perekaman. Nilai akurasi model kesesuaian habitat menunjukkan hasil sangat baik (AUC 0,975) dengan pengaruh variabel tertinggi yaitu curah hujan dan suhu. Salah satu habitat yang sesuai untuk kalong terdapat di Cagar Alam Leuweung Sancang. Pemetaan area risiko virus nipah menunjukkan sedikit lokasi yang memiliki risiko tinggi dalam penyebaran virus nipah., The large flying fox has a wide home range so that spatial distribution modelling is required to identify the suitability of its habitat. This animal has an important role for the ecosystem although it is believed to be the reservoir of viruses. This study aims to analyze the daily movement, home range, variables that affect habitat suitability and risk of nipah virus in West Java Province. The presence point of the two individuals was recorded in 2017-2018 using ARGOS satellite telemetry. Analysis of daily movements and home ranges showed different results from both individuals with a tendency not to move far from the starting point of recording. The accuracy value of the habitat suitability model shows excellent results (AUC 0.975) with the highest variable influence of rainfall and temperature. One of the suitable habitats for kalong is found in Leuweung Sancang Nature Reserve. Mapping the risk area of nipah virus shows few locations that have a high risk in the spread of nipah virus.
Keyword: kalong, habitat, pergerakan harian, virus nipah, wilayah jelajah

Judul: Daerah jelajah dan penggunaan ruang Kukang Jawa (Nycticebus javanicus) di Taman Nasional Gunung Halimun Salak Jawa Barat
Abstrak: The Javan slow loris (Nycticebus javanicus) is a slow moving nocturnal prosimian primate. Javan slow lorises are considered Critically Endangered by the International Union for the Conservation of Nature (IUCN 2013), as well as being listed in Appendix I of Convention on International Trade in Endangered Species (2007). To date, there is limited source information available regarding wild loris ecology and behavior. In this study, home range areas and use space of wild javan slow loris was carried out in Mount Halimun-Salak National Park, in Bogor, West Java, Indonesia. This study aims to measure home range size and to analyze activity budgets in natural forest conditions. Kernel Home range methods were used to analyze home range areas, while Point Centered Quarter methods were used to collect habitat data, and five minute Instantaneous-Focal Animal Sampling was used to observe and record behavioral data. The observed lorises were two adult females, one of which (Individual I) was pregnant. Analysis showed contiguous home range sizes of 5.43 hectares and 5.58 hectares for Individuals I and II respectively, as well as a core home range area of 1.77 hectares and 1.60 hectares. These home ranges were larger than that reported in Malaysian Nycticebus coucang. Behavioral analysis showed that daily activities were dominated by travel, feeding, active, and foraging, which took place primarily in the lower canopy stratum (2 – 15 m), whereas sleeping typically occurred in the medium canopy stratum height (15 – 22 m). The use of space of javan slow loris correlated with height, substrat, contact, and size of branch. Javan slow loris preferred heights positions (5 – 7 m), and the size of a small twig branch categories. Javan slow loris preferred to use kaliandra (Calliandra calothyrsus), bungbuai (Plectomia elongata), and kisampang (Evodia latifolia) as foraging site and sleeping tree.
Keyword: Bogor Agricultural University (IPB), lower canopy, kernel home range, sleeping tree, Core area

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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