Judul: Kajian Kelayakan Usaha Budidaya Gracilaria dan Evaluasi Kinerja Kelompok “Budidaya Rumput Laut Serang Utara” di Kabupaten Serang
Abstrak: The utilization of marine and fishery potential has the economic prospect for Indonesia. Indonesia waters blessed with abundant and diverse of marine living resources. One of those marine resources is seaweeds. From the various type of seaweed that existed in Indonesia waters, Gracilaria is one of the seaweed with high economical values in Indonesia, especially for the manufacture of agar (jelly). Seaweed is one of commodity that cultivated in the sea and ponds, and become one of international commodities in trading. Serang district is one of the regions where the Gracilaria utilization is not yet optimized. Data in 2010 shows, Serang revenues of approximately 19.25 billion rupiah with the total land used about 500 hectares from 5,000 hectares of total land. 4,500 hectares that remained unutilized with potential revenue of Rp. 101.25 billion, or in other words the lost amount of potential revenue in Serang district is up to 5-fold or 80% of the total potential revenue. This study aims to determine if seaweed species of Gracilaria worth to cultivate and to measure the work performance carried out by the group in their seaweed business development. This study is a study conducted in Serang district which has a potential development of Gracilaria species. In this study, the research used quantitative approach. Data is collected using primary and secondary data. The sampling technique used was purposive method. The sample in this study were all members of the group "Budidaya Rumput Laut Serang Utara" and the customer of business group "Budidaya Rumput Laut Serang Utara". The feasibility study of seaweed cultivation using secondary data sources, while the assessment of the work performance group "Budidaya Rumput Laut Serang Utara" uses primary data with BSC method which based on survey results, as well as secondary data for the assessment of multiple perspectives. The results shows, based on the analysis of the feasibility of seaweed cultivation of Gracilaria, the market and marketing aspects, technical aspects, financial aspects, political and socio-economic aspects, environmental aspects, aspects of human resources and legal aspects gives positive results. While the results of work performance of each BSC perspective shows: (1) The perspective of membership (83.42%), (2) Perspective of Learning and empowerment (71.83%), (3) Internal business process perspective (55.8%), (4) Financial Perspective (39.23%). After multiplication by each of the perspective, the achievement of the overall performance is KBRLSU 63.72%, or still below 80%.
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Judul: Performance analysis of Seaweed Gracilaria gigas at Sea and Ponds Cultivated System in West Nusa Tenggara Barat
Abstrak: Gracilaria gigas is a low level plants which does not have tree roots, stems and leaves of true, but in the form of thallus branching, and live in the sea with a depth that can still be reached by sunlight. G. gigas is one of seaweed species the from red algae type (Rhodophyceae) producsy agarofit, G. gigas have the high fiber and good for health. Thei research aims to analyze the performance of production, yield and quality of G. gigas seaweed cultivated in the sea and in the ponds. The cultivation of G. gigas in ponds was held in Sekotong, west Lombok by broadcast method in 1500 m2 planting area. While cultivation in the sea was held in Gerupuk Bay, Central Lombok by Long-line method the 1250 m2 planting area. Average productivity of G. gigas cultivated in the sea 12.72%, while in ponds 4.00%. the was seaweed yield cultivation in ponds reached 18, 53%, and in marine aquaculture reached 6.85%, while the quality that the gel strength of G. gigas cultured in ponds was 18.46%, and in the sea reached 7.54%. the yield and gel stregh were positively correlated with N waters and branching index. Cultivation of G. gigas in the sea with long-line method in order to produce a yield of 6.85%, 7.54% and gel strength, whereas in the stocking ponds with methods that produce a yield of 18.53%, 18.46% and gel strength. The quality of the cultivated seaweed in the ocean negatively correlated with salinity (0.87), while the cultivation in ponds negatively correlated with nitrate (0.85) and ammonia (0.95), and positively correlated with brightness (0.91) and phosphate (0.66). The branching index seaweed cultivated at the sea rods closely related salinity to approximately 87%. Seaweed cultivation in ponds shared negative associated between branching index and brightness (91%), and phosphate (66%), oxygen (62 %). Otherwise parameters associated negatively were branching index and ammonia (95%), o nitrate (85%).
Keyword: seaweed culture, Gracilaria gigas, branching index, seaweed quality, dan productivity

Judul: Transisi Fasa Materi Hadronik ke Materi Kuark pada Inti Bintang Neutron.
Abstrak: Bintang neutron terdiri dari beberapa lapisan yang disusun oleh materi nuklir yang berbeda dengan kerapatan yang semakin tinggi ketika mendekati pusat bintang. Inti luar bintang neutron disusun oleh materi hadronik (nukleon, lepton, dan hyperon), sedangkan inti dalam bintang neutron disusun oleh kuark-kuark bebas (up, down, strange) yang saling berinteraksi. Tujuan penelitian ini adalah mempelajari bagaimana transisi dari inti luar ke inti dalam bintang neutron dengan menggunakan pendekatan RMF (Relativistic Mean Field) untuk materi hadronik dan CIDDM (Confined Isospin Density Dependent Mass) untuk materi kuark. Tekanan transisi diperoleh ketika potensial kimia barion materi hadronik dan materi kuark bernilai sama. Nilai tekanan transisi dengan parameter SU6-TM1 sekitar 87 MeV/fm3 dan diperoleh massa maksimum bintang neutron yaitu 1.92M dengan jari-jari sekitar 8.62 km. Nilai tekanan transisi dengan parameter SU6-G2 sekitar 53 MeV/fm3 dan massa maksimum bintang neutron yaitu 1.88M dengan jari-jari sekitar 8.16 km. Jenis transisi fasa adalah orde satu ditandai dengan diskontinuitas dalam kerapatan energi (adanya mixed phase). Parameter-parameter pada model nuklir yang digunakan menyebabkan perbedaan kekakuan persamaan keadaan (EOS) dari materi hadronik dan materi kuark sehingga nilai tekanan transisi dari fasa hadronik ke fasa kuark juga berbeda.
Keyword: bintang neutron, persamaan keadaan, transisi fasa