Judul: Identifikasi pemalsuan susu kambing melalui uji sifat listrik
Abstrak: Susu kambing merupakan salah satu bahan pangan yang memiliki nutrisi tinggi. Dalam beberapa periode ini banyak kasus pencampuran bahan makanan dengan bahan lain. Susu termasuk dalam kategori yang rentan untuk dipalsukan. Pemalsuan susu yang sering dengan penambahan air, air cucian beras, air tajin, dan santan. Salah satu upaya untuk mengidentifikasi pemalsuan ini dengan menguji sifat listrik dari susu murni dan susu yang telah dipalsukan. Dari penelitian yang dilakukan, susu yang dicampurkan dengan air, air beras, air tajin, dan santan memiliki korelasi antara konsentrasi bahan tambahan dengan impedansi, resistansi, dan konduktansi yang dimiliki sampel. Semakin besar konsentrasi bahan penambah maka nilai dari impedansi dan resistansinya akan meningkat, namun nilai konduktansinya semakin menurun. Untuk kapasitansi yang diukur tidak memiliki korelasi dengan penambahan konsentrasi bahan penambah. Dengan demikian pemalsuan susu yang ditambah air, air cucian beras, air tajin, dan santan dapat identifikasi dengan mengukur impedansi, resistansi, dan konduktansinya.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Goat milk, Impedance, Capacitance, Resistance, Conductance

Judul: Identifikasi Pemalsuan Susu Kambing melalui Uji Sifat Listrik
Abstrak: Goat's milk is one of the foods that have high nutritional. In this period there are some cases of foodstuffs by mixing with other materials. Milk is included in the vulnerable category to forge. Adulteration of milk that often with the addition of water, rice water, starch water, and coconut milk. One of the efforts to identify these case by examining the electrical properties of pure milk and milk that had been forged. From the research, milk that has been mixed with water, rice water, starch water, and coconut milk have correlation between concentration of additive with impedance, resistance, and conductance of the sample. The greater the concentration of the additive, impedance and resistance will increase, but the conductance decreases. The measured capacitance has no correlation with the concentration of additive. Thus adulteration of milk with addition of water, rice water, starch water, and coconut milk can be identified by measuring the impedance, resistance, and conductance
Keyword: goat’s milk, impedance, capacitance, resistance, conductance

Judul: Indexing Spatio-Temporal Pada Data Hotspot
Abstrak: The spatial information of hotspot is always changing over time. The recording of these changes makes it necessary to add dimension of time (temporal) into database. The database which is capable to store spatial and temporal information is known as spatiotemporal database. This database is bigger than a normal database because it stores all versions of an object over time and not allowed data to be physically deleted. A large database size causes it’s search time increases. It makes an access structure is needed in spatiotemporal database. Indexing is one of the access structure applied in the spatiotemporal database that accelerates data searching process. Spatiotemporal indexing method consists of two parts namely spatial indexing which is based on geographical information, and temporal indexing which is based on data timing information. The process of hotspot data indexing will be done in this research by using R-Tree approach for spatial data and Change Temporal Index (CTI) for temporal data. R-Tree is a hierarchical, height-balanced external memory data structure for multidimensional object. The hierarchical of R-Tree based on list of administrative such as regency, provinces and island. Change Temporal Index makes indexed data based on temporal side like valid time. CTI keeps valid data in current database and previous data according to interval valid time in historical database. This research is expected to accelerate the retrieving process in spatiotemporal databases. Spatial indexing makes searching faster up to 70%, temporal indexing makes searching faster up to 35% and spatiotemporal indexing makes searching faster than without indexing up to 50%.
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