Judul: Efektivitas penambahan a-tokoferol di dalam pengencer tris dan susu skim terhadap kualitas semen beku kambing peranakan etawah
Abstrak: Proses kriopreservasi menyebabkan penurunan kualitas semen setelah pencairan kembali karena faktor-faktor termal (cekaman dingin), mekanikal (kristal es intraseluler), kimiawi (komponen pengencer) dan stres osmotik (tekanan osmotik pengencer). Selain itu kematian spermatozoa dapat pula diakibatkan oleh pengaruh radikal bebas yang menimbulkan reaksi berantai peroksidasi lipid yang merusak membran sel spermatozoa. Reaksi berantai peroksidasi lipid dapat dicegah dengan menambahkan suatu antioksidan ke dalam pengencer semen yang dapat memutus reaksi tersebut., The objectives of this research were to determine the influence of extenders and effect of a-tocopherol as an antioxidant on frozen semen quality of crossbred Etawah bucks. Semen samples collected from eight crossbred Etawah bucks were extended with two different extenders (Tris and skim milk) supplemented with a-tocopherol with doses of 0.0, 0.2, 0.3 and 0.4 g. each in 100 ml of the extenders and packaged in ministraws of the Minitüb system. Extended liquid semen in Minitübes were equilibrated at 3-5°C for four hours and frozen over the liquid nitrogen vapor for 10 minutes and stored for 24 hour in liquid nitrogen (-196° C). The stored semen was then thawed at 37°C for 30 seconds.
Keyword: Frozen semen, Goat, Skim milk, Tokoferol

Judul: Kualitas semen beku kambing peranakan etawah menggunakan modifikasi pengencer tris soya dan tris kuning telur
Abstrak: Reproduction of goats in Indonesia mostly managed by natural mating, while the Artificial Insemination (AI) has been limited. The success rate of AI in goats has been low because of some factors, one of those has been identified as the low quality of extender. Tris Egg Yolk (TEY) and AndroMed® have been widely used for extenders of frozen semen in goats. Effect of Tris Soya (TS) that have lesitin nabati and studies to describe the profiles of each extenders to the sperm quality have been quite limited. The aim of this study was to compare TEY, AndroMed® and TS extenders on sperm motility and viability before and after freezing of goats semen. Semen was collected from three sexually mature Etawah Crossbreed goats twice a week, each semen sample was divided into three tubes to be mixed with TEY, AndroMed® or TS before those got frozen. Sperm motility and viability were evaluated macroscopically before freezing and microscopically before and after freezing. The result of this study revealed that TEY and AndroMed® gave higher sperm motiliy (68.52±0.64% and 68.71±1.95%) than TS (37.03±4.25%). The viability of sperm was also higher in TEY and AndroMed® (73.45±1.52% and 73.94±1.31%) compared TS (46.76±4.76%). It was concluded that TEY and AndroMed® were better extenders to protect goats sperm compared TS.
Keyword: AndroMed®, Etawah Crossbreed, frozen semen, Tris Egg Yolk, Tris Soya.

Judul: Sistem Informasi Geografis untuk Pola Aktivitas Manusia dengan Pemodelan Data Spatio-Temporal
Abstrak: The human activity in a given time period will shape its pattern. This research develops a spatiotemporal data model to support the prediction of human existence based on activity-pattern and also visualizes the activity locations in a GIS environment. This so-called mobility oriented spatiotemporal data model conceptualizes the spatial and temporal interaction of activity behaviour using the concept of mobility. In other words, activity patterns are conceptualized as a sequence of staying at or traveling between activity locations. The model can support the analysis and queries of activities from different perspectives, i.e. queries can be time-oriented, person-oriented, activity-oriented, and location-oriented. A prototype system based on the activity data modelling is implemented in MySQL 5.0.27 as DBMS with using PhpMyAdmin 2.9.1.1 software. Spatial database is developed with using software QuantumGIS and ArcView. The system could be accessed online through a web browser with MySQL as its database storage and Pmapper framework as the tools used in visualizing the activity locations.The information were provided in the form of activity attribute-data as the user requested and graphical-data (map) which contains information about its activity locations.
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