Judul: Sistem pengontrolan suplai energi untuk pedinginan termoelektrik dengan menggunakan sel surya
Abstrak: Pendinginan salah satu metode untuk mempertahankan mutu bahan pangan. Pendinginan yang merupakan proses penurunan suhu tertentu di atas titik beku. Umur simpan bahan pertanian dapat diperpanjang dengan penurunan suhu, karena dapat menurunkan aktifitas enzimatik dan reaksi kimia oleh mikroba. Salah satu teknologi pendinginan yang biasa dilakukan adalah termoelektrik. Sistem ini bekerja dengan mengkonversi energi panas menjadi energi listrik secara langsung (generator termoelektrik) atau sebaliknya dari listrik menghasilkan dingin (pendingin termoelektrik). Teknologi ini merupakan sumber alternatif dalam menjawab kebutuhan energi. Disamping relatih lebih ramah lingkungan, teknologi ini merupakan sangat efisien, tahan lama, dan juga mampu menghasilkan energi dalam skala besar maupun kecil. Teknologi termoelektrik memanfaatkan sel surya yang dapat mengkonversika energi surya menjadi energi listrik.
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Judul: Rancangan dan Kinerja Sistem Pengeringan Berenergi Surya, Biomassa dan Angin
Abstrak: Salah satu pemanfaatan energi terbarukan di bidang pertanian yaitu untuk proses pengeringan produk pertanian. Secara tradisional, para petani memanfaatkan energi surya untuk pengeringan produk pertanian. Seiring dengan perkembangan teknologi, beberapa inovasi teknologi pengeringan produk pertanian telah dikembangkan terutama di negara-negara berkembang bahkan negara maju. Di Indonesia, beberapa inovasi telah dilakukan oleh BPPT dan beberapa perguruan tinggi salah satunya IPS. Penelitian yang dilakukan Kamaruddin et al (1995) diantaranya pengering tipe efek rumah kaca untuk pengeringan biji-bijian dan buah-buahan. Selain itu telah dilakukan pula penggabungan sumber energi terbarukan untuk pengeringan salah satunya dengan energi biomassa.
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Judul: Categorization in Macaca fascicularis.
Abstrak: Categorization is an ability to group individuals or events into different classes mediated by conceptualized mental images. There are several levels of categorization and within a taxonomy the levels are nested. At the most concrete level of categorization, all or most members of the category shared common physical attributes that differ from other categories. The higher the level of category, the fewer common attributes between members of the group. In addition to humans, the ability to categorize has also been proposed in animals. One example of categorization in animal is species discrimination. Using matching-tosample task, present experiment tested ability of the long-tailed macaque (Macaca fascicularis) in discriminating dichotomous-stimuli of different animals. The species has been shown to be able to see photos as representations of real object so I used facial photos of humans and animals for the stimuli. First, I tested their ability to classify humans and macaques into separate group. Second, I tested their ability to discriminate their conspecific from other macaques. And the last, I tested whether the subjects were able to discriminate non-human animals from humans. In all of these experiments I found that the subjects showed high performance in categorizing objects, even when I discarded details of visual informations, such as color and local shapes. The ability to identify objects with reduced representation of physical properties means the subjects were able to generalize attributes of members of the group. This would indicate that the subjects created a higher level abstraction. On the other hand, in discriminating intrageneric macaque species I found that they were able to extract uniqueness of each species. More over, I also found that the subjects were able to put photos of non-human animals that shared very few similarities in physical percepts into one group. I suggested that the subjects could create a more abstract concept based on non-percepts relations as a basis to put the objects into one category. Thus, I concluded that M. fascicularis were able to perform multiple levels of categorizations.
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