Judul: Study on the effect of inner layer and filler materials to quality of tomato fruit (Lycopersicon esculentum Mill.) in wooden box package during transportation
Abstrak: The purpose of this study were to examine the amount of mechanical damage of tomatoes in each package after transportation simulation, the effect of inner layer and filler materials to the damage of those tomatoes during transportation, and determine to the best among used inner layer and filler materials for tomatoes transportation. The study was carried out on February to April 2011 in TPPHP Laboratory of IPB. There were five packages used in this study which consist of four packages for treatment and one package for control. The four treatment packages were package with shredded newspaper filler only, package with dried banana leaves filler only, package with inner layer and shredded newspaper filler, and package with inner layer and dried banana leaves filler. The material of inner layer was a paper that usually used for packing of cement. All of the packaged were simulated on the road in the Sub’urb condition (frequency 3.23 Hz, amplitude 4.75 cm for vertical vibration, during 80 minutes) so the path length (distance) equality was 106.16 km. The package with inner layer and dried banana leaves filler material have the highest mechanical damage there is 44.96%. Then followed by the package with dried banana leaves only, the package with inner layer and shredded newspaper filler material, and the package with shredded newspaper only, those are 32.97%, 27.53%, and 25.20% respectively. On the other hand, the package for control (no treatment) have the mechanical damage in amount of 53.79%. It can be concluded that the tomatoes packaged by shredded newspaper filler only has a lowest mechanical damage, so this package should be a good package for the distribution transportation of tomatoes in wooden box.
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Judul: Pengaruh Jenis Kemasan dan Pengisi Terhadap Mutu Fisik Buah Pisang Ambon (Musa paradisiaca L.) Selama Simulasi Transportasi.
Abstrak: Pisang ambon merupakan produk yang mudah sekali rusak, dan kerusakan akan berdampak terhadap kualitas, susut pascapanen, dan turunnya harga sehingga penanganan pascapanen yang tepat diperlukan untuk mempertahankan kualitasnya. Oleh karena itu, penelitian ini dilakukan untuk mengetahui pengaruh dari penggunaan jenis kemasan dan pengisi terhadap mutu buah pisang ambon, serta pemilihan bahan kemasan dan pengisi terbaik untuk menunjang kegiatan transportasi dan distribusi pascapanen pisang ambon. Bahan kemasan yang digunakan adalah kayu dan kardus, sedangkan koran dan daun pisang sebagai bahan pengisinya. Simulasi transportasi dilakukan selama 2 jam dengan frekuensi 3.41 Hz dan amplitudo 3.61 cm atau setara dengan perjalanan luar kota sejauh 132.3 km atau jalan buruk aspal sejauh 62.2 km. Kombinasi kemasan dan pengisi dengan kerusakan mekanis paling kecil adalah kemasan kardus dengan pengisi koran dengan persentase kerusakan mekanis rata-rata 15.33%. Berdasarkan analisis statistik, penggunaan jenis kemasan dan penggunaan bahan pengisi berpengaruh nyata terhadap kerusakan mekanis buah pisang ambon.
Keyword: kemasan, kerusakan mekanis, pengisi, pisang ambon, simulasi

Judul: : Persamaan Tunggal sebagai Representasi Kurva Komposit
Abstrak: A mathematical method is introduced to represent a composite curve based on an extension of analytic geometry. The representation is given either with a single equation or with two equations, in the case of parametric representation. This method permits the representation of composite curves in similar manner to the conventional representation of non-composite curves. Some mathematical tools, including Heaviside unit step function and periodizer function, are used in the establishment of a single equation. In this paper, regular equations of regular and irregular polygon, as well as composite curves of two dimensions, are implemented using a computer algebraic system, Mathematica.
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