Judul: Penentuan Titik Kritis Pascapanen Pepaya Carica papaya L. (Studi Kasus di Sentra Produksi Pepaya di Kabupaten Sukabumi, Banyumas, Kebumen, dan Boyolali)
Abstrak: Papaya (Carica papaya L.) is one a tropical fruit which is popular in Indonesia. Papaya is perishable fruits and has short postharvest life. Due to lack postharvest handling and its facility, losses in postharvest handling of papaya is still high. The range of total losses in postharvest handling for papaya is 25-40 percent. This total losess is identified from harvesting activity to the market. There are some actors in postharvest handling contribute in total losess. The objective of this study was to identify supply chain of papaya, to assess losess of papaya in supply chain, and to determine the critical point of postharvest losses of papaya. This study was carried out in the production center of papaya in Sukabumi (West Java), Banyumas, Kebumen and Boyolali (Central Java). The study was conducted by in dept-interview to all actors in supply chain of papaya, field observation to identify the supply chain and post-harvest losses and measurement of losess at each actors activities. The results showed that supply chain of papaya consists of farmers, collectors, suppliers, wholesalers, and retailers. The critical points of losess in postharvest handling of papaya in Kebumen and Boyolali was observed at the level of retailer. The different result was obtained in Sukabumi and Banyumas. In Sukabumi, the critical point in postharvest losess was found at suppliers level, in Banyumas was observed at wholesaler level.
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Judul: Pengujian Sifat Benih Pepaya (Carica Papaya L.) Dengan Perlakuan Penyimpanan Suhu Rendah
Abstrak: Papaya (Carica papaya. L) is a multi-purpose plant for almost all parts of this plant can be utilized. In this study using seeds that will detect the nature of papaya seeds. The research was conducted at the Laboratory of Seed in PKHT and Greenhouse Lewikopo, IPB, Bogor. The research was conducted in November 2011 until March 2012. In this study using a 3 kind papaya from PKHT that can represent all sizes of types of papaya. Sukma papaya varieties represent a large size, representing Callina papaya medium, and Carisya representing the size of a small papaya. This study uses two treatment factors, namely the period of store (0, 1, 2, and 3 months) and store temperature (room temperature (25-28 oC) and low temperature (-20 oC)). Before these edsare stored, carried the seeds drying in advance using a solution of MgCl to create different water levels. Observations carried out every month until the end of 3 month seriodesave on viability of papaya seeds. Results showed that the papaya Varieties Sukma have characteristic intermediate, while papaya Varieties Carisya and Calina included in characteristic orthodox.
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Judul: Solusi Geometri Schwarzschild untuk Dimensi 4+1 dengan Invarian Rotasi Isotropik.
Abstrak: Metrik Schwarzschild merupakan solusi eksak pertama dari persamaan medan Einstein dengan mangasumsikan metrik statik dan simetris. Metrik Schwarzschild yang ditemukan oleh Karl Schwarzschild masih dalam dimensi 3+1, namun seiring dengan teori-teori terbaru yang menunjukkan bahwa alam semesta tidak hanya di dimensi 3+1. Maka melalui penambahan dimensi, tujuan penelitian ini memperoleh solusi pada geometri Schwarzschild untuk dimensi 4+1 dengan memodifikasi koordinat bola yang invarian rotasi isotropik dan melalui penurunan rumus seperti koordinat bola, simbol Christoffel, dan tensor Ricci. Selain mendapatkan solusi ini, metrik Schwarzschild dimensi 4+1 dapat digunakan sebagai metrik dasar untuk memperoleh solusi blackhole dan wormhole pada dimensi 4+1. Hasil akhirnya, dengan memanfaatkan modifikasi koordinat bola, metrik Schwarzschild dapat dibentuk sehingga diperoleh solusi geometri Schwarzschild untuk dimensi 4+1.
Keyword: metrik Schwarzschild, persamaan medan Einstein, modifikasi koordinat bola, penambahan dimensi, invarian rotasi isotropik