Judul: Uji Daya Hasil Sepuluh Galur Cabai (Capsicum annuum L.) Bersari Bebas yang Potensial Sebagai Varietas Unggul
Abstrak: The objective of this research is to compare several lines of expecting a open pollinated variety chilli as a result from Breeding Laboratory of Bogor Agricultural University with OP chilli variety which have been already in the marketplace and get a strain that has a superior characteristics than the comparison varieties. This research conducted on July 2010 until January 2011 in Leuwikopo Experimental Farm, Bogor Agricultural University. The experiment was carried out by using a random complete block design with thirdteen treatment and three replicates so completely there are 39 units of the experiment. Strains tested i.e. F6001004-5, F6002003-9, F6002005-4-76, F6002046-2, F6015002-8, F7002001-4, F7009002-1, F7009015-4, F7009019-1, and F7015008-5, next compared to three commercial chili varieties i.e. Trisula, Gelora, and TIT super. v Variables observed covering quantitative and qualitative character. Evaluation of quantitative characters plant observed covering plant height, dicotomous height, stem diameter, wide- canopy, wide leafs, leaf length, flowering age, weight per fruit, the weight of fruit worthy of the market, and the total weight of the fruit. The evaluation of qualitative characters including plant growth habit, stem shape, stem color, leaf shape, leafs color, leaf shape edges, the surface shape of the leaf, corolla color, anther colour, flower position, fruit shape, the color of the young fruit, dark fruit color, and shape of the fruit skin surface. Evaluation character based on variables fruit production plant showed there were F6002046-2, F6001004-5 and F7009015-4. strain are considered worthy developed as a potential superior varieties.
Keyword: genetic, qualitative character, quantitative character

Judul: Uji Daya Hasil dan Evaluasi Keragaan Sepuluh Galur Harapan Tanaman Cabai Besar (Capsicum annuum L.) IPB
Abstrak: Cabai besar (Capsicum annuum L.) merupakan salah satu komoditas hortikultura terpenting yang banyak dibudidayakan dan dikonsumsi oleh masyarakat Indonesia. Hal ini menjadikan pemuliaan tanaman cabai perlu terus dilakukan terutama dalam menghadapi tantangan perubahan iklim dan peningkatan manusia yang pesat. Penelitian ini bertujuan mengevaluasi daya hasil dan keragaan dari sepuluh galur harapan cabai besar IPB. Penelitian dilaksanakan pada September 2022 hingga Maret 2023 di Kebun Percobaan Leuwikopo IPB dan Laboratorium Pemuliaan Tanaman, IPB Dramaga, Bogor, Jawa Barat. Penelitian ini menggunakan rancangan kelompok lengkap teracak (RKLT) faktor tunggal dengan tiga ulangan. Bahan tanam yang digunakan terdiri dari sepuluh galur harapan IPB dengan tiga varietas pembanding yaitu Arisa IPB, Anies IPB, dan Seloka IPB. Hasil penelitian menunjukkan bahwa perlakuan genotipe berpengaruh nyata terhadap seluruh karakter yang diamati kecuali diameter batang. Galur cabai besar yang diuji memiliki potensi untuk dilepas menjadi varietas unggul baru karena menunjukkan hasil yang sama atau lebih baik dari varietas pembanding. Dari kesepuluh galur yang diuji, galur F4.317375-3-1 berpotensi untuk menjadi calon varietas unggul baru karena memiliki jumlah buah total per tanaman yang banyak (70,46 buah), bobot buah total per tanaman yang tinggi (483,71 g), umur berbunga (30 HST) dan umur panen (75 HST) yang cepat, produktivitas tanaman tinggi (9,5 ton ha-1), potensi hasil tinggi (16,32 ton ha-1) yang setara atau lebih baik dari varietas pembanding., Chili pepper (Capsicum annuum L.) is one of the most important horticultural commodities cultivated and consumed by the Indonesian people. This makes the breeding of chili pepper plants an ongoing necessity, especially in the face of the challenges posed by climate change and rapid population growth. This research aims to evaluate the yield and performance of teen lines chili pepper IPB. The research was carried out from September 2022 to March 2023 at the Leuwikopo Experimental Garden of IPB and Plant Breeding Laboratory, IPB Dramaga, Bogor, West Java. This study used a Randomized Complete Block Design (RCBD) with a single factor and three replications. The plant material consisted of teen lines IPB and three comparison varieties of chili were Arisa IPB, Anies IPB, and Seloka IPB. The results of the study showed that the genotype treatment had a significant effect on all observed traits except stem diameter. The tested chili pepper lines demonstrated potential for release as new superior varieties, as they exhibited similar or better performance compared to the reference varieties. Among the teen tested lines, F4.317375-3-1 showed potential as a candidate for a new superior variety due to its high total fruit yield per plant (70.46 fruits), total fruit weight per plant (483.71 g), early flowering (30 DAS), early harvest (75 DAS), high plant productivity (9.5 tons/ha), and high yield potential (16.32 tons/ha), which were either equivalent or better than the reference varieties
Keyword: cabai besar, evaluasi, galur, karakter, varietas pembanding

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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