Judul: Pengelolaan usaha bunga potong lisianthus di PT. Saung Mirwan, Megamendung, Bogor, Jawa Barat
Abstrak: Lisianthus is an annual ornamental plants, that comes from subtropical countries, Southern of United States, Mexico, Caribbean and Northern of South America. In Indonesia, Lisianthus has not well known yet by the public. However, the characteristics of this plant has the advantage, especially as an ornamental plant. Lisianthus has unique flower with attractive colors and has a high selling price. Lisianthus as cut flowers has good development prospects in Indonesia. PT.Saung Mirwan is one of horticulture company that produces lisianthus as cut flowers. The apprentice was started on February until June in PT. Saung Mirwan, Megamendung, Bogor, West Java. The student worked as daily employee, assistant of head subdivision, and assistant of head division. This activity was learning how to manage and cultivate Lisianthus, so that the activities in the nursery and field, harvest, post harvest treatment until lisianthus sold to consumer could be produced with good quality. The problems that found in field were many rosette plants, pests and diseases,and not optimal environment conditions for the gowth of lisianthus. Improvements to the cultivation technique, workers skill development, and increase network is needed for better production.
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Judul: Studi Budidaya Lily Potong (Lilium Spp.) di Kebun Cibodas PT. Puri Sekar Asri Lembang-Bandung, Jawa Barat.
Abstrak: Lily as cut flower is one of ornamental plant which has high price in Indonesia. High demand of lily cut flower in domestic market must be followed by good agriculture practices to decrease the lost product. The internship was implemented at PT. Puri Sekar Asri, Lembang, Bandung which supplies lily as cut flower. The purposes of this internship were to know, learn and analyze the harvest and postharvest management of lily cut flower that carried out in Cibodas field and also to increase the basic knowledge and skills of the author related to the cultivation, harvest and postharvest handling on lily cut flower. Through the observations of five lily varieties which were cultivated in Cibodas field, Crystal Blanca variety was the most widely cultivated variety. The development of lilies were based on each characteristic of the variety and its growing environment. Cool storage could be extending the vaselife of lily cut flower for 5 days. Exact Harvest and postharvest standardization and practices have not been fully implemented by workers at the company .it can be seen from the very high presentage of harvesting error at Acapulco dan Rio Negro variety which can reach over 50% and high presentage grading errors at Lake Carey variety which can reach 40%.
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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