Judul: Analisis kelayakan penggunaan pengering terowongan energi surya rancangan hohenheim
Abstrak: Pengeringan merupakan salah satu cara pengolahan produk pangan dan hasil pertanian yang telah banyak digunakan masyarakat Indonesia semenjak dahulu. Pengeringan yang paling sederhana adalah penjemuran. Masalah yang dihadapi dengan penjemuran ini adalah waktu pengeringan yang lama. Dengan waktu pengeringan yang lama ini dapat mendan mutu produk yang dikeringkan yaitu warna dan aroma. Selain itu penjemuran yang dilakukan di lantai jemur atau tikar kurang higenis dari seranggga, kotoran dan debu. Penggunaan sinar matahari untuk pengering mekanis adalah salah satu alternatif sumber energi untuk pengeringan selain dengan penjemuran biasa. Pengering terowongan energi surya rancangan Hohenheim merupakan pengering mekanis yang menggunakan kolektor surya sebagai sumber panasnya.
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Judul: Rancangan alat pengering dengan kolektor surya pelat datar yang menggunakan air sebagai media penyimpanan panas untuk pengeringan gabah
Abstrak: Produk hasil pertanian pada umumnya tidak tahan lama jika disimpan, oleh karena itu membutuhkan upaya penanganan agar daya tahannya lebih. lama. Pengeringan mempakan salah satu metode pengawetan produk pertanian sehingga dapat tahan lama disimpan. Pengeringan dapat dilakukan secpra langsung dengan bantuan sinar matahari sebagai sumber panas untuk proqes pengeringannya. Pengeringan langsung memiliki ketergantungan terhadap cuaca, selain itu jika pengeringan di'lakukan di lingkungan yang terbuka akan timbul banyak permasalahan barn yang dapat merusak mutu produk diantarapya kontaminasi dari debu, kotoran, serangga kecil dan hewan-hewan pengganggu lainnya. Untuk mengatasi permasalahan tersebut maka dirancang sistem pengering dengan menggunakan kolektor surya pelat datar. Prinsip kerja pengering dengan kolektor surya pelat datar ini adalah dengan menyerap energi panas yang melewati penutup transparan oleh absorber yang berupa pelat hitam. ~ a d aba gian bawah absorber terdapat pipa yang mengalirkan air atau fluida pengkonduksi untuk dipanaskan, yang nantinya bisa dimanfaatkan untuk berbagai keperluan.
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Judul: Phylogeography and Species Limits in the Papuan White Snake (Micropechis ikaheka) (Reptilia: Serpentes: Elapidae)
Abstrak: Papua white snake, Micropechis ikaheka, has been distingushed into two subspecies M.i. ikaheka and M.i. fasciatus. However, due to lack of data on their morphology, distribution and ecology, both subspecies often ignored in scintific discussions and refers only byas , Micropechis ikaheka. This study was designed to document the differences between M.i. ikaheka and M.i fasciatus by using scales characteristics and reproductive organ or hemipenes. The study also examine, zoogeography, habitat, diet and cannibalism of both subspecies to better understanding the the ecology of one of the most venomous snakes in the world. This study consists of three topics with method and also different in the size samples, respectively. The first study is the histology and microtopography of the skin were studied using paraffin method and Scanning Electron Microscope (SEM). The second is the hemipenis were examined by following Myers and Cadle (2003), and Zaher and Prudente (2003). The third is the abdominal surgery was carried out to document diet type and the investigate phenomenon of cannibalism in the snake. Specimens for this study came from the collection from Museum Zoologicum Bogoriense (MZB) and Universitas Negeri Papua’s Laboratory (LZU). The research result also indicated that the markers of skin and hemipenis described the same structure and microornamentation in all M. ikaheka groups being compared. Based specimens examined morphological descriptions do not s support the further differentiation in Micropechis. In short, two markers that used in this study could not sufficiently indicate the differences in the level of species and subspecies of M. ikaheka. The study, however, were able to delineate zoogeography and skin color patterns, which fall into four groups: M. i. ikaheka; M. i. fasciatus. M. i. ssp. “intermediate”; and M. i. ssp “black”. This study also revealed that color variations did not overlap in their geographic distribution. It is therefore, it suggested that environmental factors may contribute to the skin color variations. It also assumed that habitat discontinuous and biogeography factors may also cause the loss of the connection between the original populations (vicarians) or follow colonization events (dispersal). The examined of 22 stomach contents of M. ikaheka shows this species is carnivorous, and prey on vertebrates such as amphibians, fish, reptiles, and Mammals. These snakes are opportunistic predators since they prey on all that can be captured, but mainly reptiles (61.5%), followed by mammals and fish (both 15.4%), and amphibians (7.7%). Although categorized as terrestrial animal, the diet study showed that M. ikaheka snakes often go into the water to hunt for fish (the sample from Yapen island), including eel (the sample from Aru island). Based on prey items indentified, there is evidence that M. ikaheka is cannibal. At this time, there still no record on reason for cannibalism, but it is assumed that cannibalism was due to competition between populations and means to control population.
Keyword: geographic variation, white snake, papua