Judul: Characteristic of Ultrasonic to Detect Quality of Japan Cucumber
Abstrak: Japanese cucumber is one of the potential of agricultural products grown for export purposes. There is a large variation in quality of the fresh Japanese cucumber so we need evaluation method to evaluate without damaging Japanese cucumber. Ultrasonic is one of the method that can be used to determine the quality of Japanese cucumber and other agricultural products. Using ultrasonic method the acoustic properties of Japanese cucumber such as velocity, attenuation and zero moment were determined. In addition to acoustic properties, other parameters measured were physical and chemical properties of Japanese cucumber that is hardness, total dissolved solids and density were also measured. Japanese cucumbers are used in this research of 150 pieces with different harvest age of 25, 30, 35, 40 and 45 days. The result show that there is relationship between ultrasonic and physic chemical properties. It can be concluded that the parameters can be used as the basis for determining the quality of Japanese cucumber. From the research results, ultrasonic velocity can be used as the basis for determining the hardness of Japanese cucumber
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Judul: Perubahan Mutu Fisik Mentimun (Cucumis sativus L.) Pada Kemasan Plastik Polietilen dan Keranjang Bambu dalam Transportasi Darat
Abstrak: Transport model and selection on packaging type in land transportation of cucumber determine the level of mechanical damage which can degrade the quality of cucumber. Mechanical damage on cucumber grouped into wound scratch, wound rupture, bruising, and wound crack. Mechanical damage will affect the physical quality of cucumber. The objective of this research is to determine effect of some packaging types on cucumber physical quality change (polyethylene plastic and bamboo baskets). The observations were conducted based on the physical quality parameters such as mechanical damage, weight loss, color, hardness, and organoleptic tests. Simulations was performed using a simulator table for 2 hours and 3 hours with an amplitude of 2.5 cm and frequency of 2.75 Hz. Physical qualiy parameter of cucumber were observed before and after simulation. Polyethylene packaging showed better results in cucumber fruit packaging, with less mechanical damage (28.48% and 32.64%), weight loss (10:07% and 10.62%) and general acceptance of cucumber by the panelists after transport with a score of 3.5.
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Judul: Penyebaran dan karantina infeksi HIV di Lembaga Pemasyarakatan
Abstrak: AIDS sekarang ini sudah menjadi suatu pandemi global yang sangat mengkhawatirkan mengingat obatnya yang belum kunjung ditemukan dan jumlah penderitanya yang selalu bertambah dan diprediksi segera akan meledak. Dan menurut Anti Sulaiman, seorang aktivis sosial, penyebaran HIV terbesar terjadi di Lembaga Pemasyarakatan. Tujuan dari karya ilmiah ini adalah mempelajari model penyebaran HIV di Lembaga Pemasyarakatan dan mempelajari hipotesis biaya dalam pemantauan dan karantina tahanan. Penyebaran HIV di Lembaga Pemasyarakatan dibuat dalam model determistik dan model stokastik. Asumsi dari kedua model ini adalah bahwa Lembaga Pemasyarakatan selalu berkapasitas N, selama interval (1,1+1) terjadi kontak antara y(f) dan N-y(t) tahanan tidak tetapi rentan terinfeksi dengan tingkat infeksi Model deterministik menghasilkan sebuah fungsi jumlah tahanan terinfeksi untuk tiap t sementara model stokastik menghasilkan sebaran dari jumlah tahanan terinfeksi untuk tiap t(t = 0,1,2,...). Hipotesis biaya dalam pemantauan dan karantina tahanan mencari level efektif pemantauan selama periode tertentu
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