Judul: Age-sex Difference in Behaviour of The Lutungs in Pangandaran Nature Park
Abstrak: Mempelajari perbedaan umur dan jenis kelamin dalam ekologi sangat berguna untuk memahami strategi mencari makan hewan tertentu. Namun sedikit penelitian tentang perbedaan umur dan jenis kelamin pada monyet colobine Asia, salah satu kelompok primata terbear di Asia. Penelitian dilakukan untuk melihat perbedaan aktivitas harian dan perilaku makan lutung jawa (Trachypithecus auratus) berdasarkan perbedaan umur dan jenis kelamin. Hasil menunjukkan bahwa terdapat perbedaan aktivitas harian lutung: persentasi istirahat lutung dewasa lebih tinggi, sedangkan lutung anak-anak lebih tinggi dalam aktivitas berpindah dan aktivitas kecil lainnya. Sebaliknya, perilaku makan menunjukkan tidak ada pebedaan diantara kelompok umur dan jenis kelamin, hal ini menunjukkan tingginya ketersediaan makanan pokok lutung dan rendahnya persaingan mendapatkan makanan antar individu dalam kelompok, dan/atau karena lutung merupakan primata pemakan daun.
Keyword: Colobine, perilaku harian, perilaku makan, primata pemakan daun, umur dan jenis kelamin

Judul: Variasi Geografis dan Lingkungan dalam Anggaran Kegiatan dan Pola Makan Lutung Jawa (Trachypithecus auratus)
Abstrak: Environmental and climatic conditions affect food abundance, affecting animals' dietary composition and diversity. Activity budgets are key information for evaluating the feeding strategy of primates. This study aims to analyze the effects of geographic and environmental factors on activity budget and dietary habits of Javan langurs (Trachypithecus auratus) across their geographical range or among forest types. This study’s data were gathered by conducting a web-based survey of the activity budget and dietary habits of the Javan langur. This study analyzed relationships between the geographical/environmental and activity, dietary composition, and social/behavioral aspects by the Spearman’s rank correlation tests and tested differences in the above variables among three forest types by the Kruskal-Wallis tests. The langurs’ diets were composed of foliage (49.0-75.7%), fruits (21.6-48.1%), and flowers (2.7-23.0%). The activities of the langurs were mainly composed of feeding (range: 20.2-44.2%), moving (9.8- 32.1%), resting (9.3-43.6%), and social behavior (2.5-28.9%). There were no significant differences between forest types and activity budget and dietary habits of the langurs and no significant correlations between geographic/environmental variations and their activity budget and dietary habits. The folivorous-based diets and their specialized digestive strategy would be the main reason for the lack of regional variation in activity and dietary habits.
Keyword: Colobines, conservation, feeding, folivorous, forest types

Judul: Penerapan teknik watermarking untuk penandaan hak cipta pada peta vektor dengan format DXF
Abstrak: Drawing Interchange Format (DXF) is one of the general file in the field of the vector image commonly used for making maps. The DXF format is a tagged data representation of all the information contained in an AutoCAD drawing (DWG) file. Tagged data means that each data element in the watermark is preceded by an integer number called the group code. The study was carried out because there is still no tools of labeling the copyright on digital mapping using DXF file. This study aims to generate an application for copyright labeling on vector map with DXF format that can be applied to any types of spatial objects in the map. The technique used is changing the code inside the vector image. The insertion of the watermark is done by utilizing ENTITIES section by multiplying objects for sets of binary values. The results showed that the image after the watermarking insertion process is the same as the original vector image. Embedded watermark is resistant to rotation and scaling, however it has the possibility of one-third to be broken in the attack on specific object. This study has successfully implemented watermarking technique for copyright labeling on the vector map with DXF format.
Keyword: Drawing Interchange Format, Robust Watermark, Tagged Data, Vector Image, Watermarking