Judul: Pengembangan Kompetensi Pembudidaya Rumput Laut Secara Polikultur di Pantai Utara Jawa : Kasus di Bekasi Jawa Barat dan Brebes Jawa Tengah
Abstrak: Seaweed is easily cultivated in polyculture, it needs less capital, small risk, the market is open but there are many challenges and obstacles for farmers successfully produce seaweed. The competence of farmers in improving productivity and income and the factors influenced them were the questions of study. The objectives of this study are : (1) to explore competence of farmer in increasing productivity and income and to identify faktors influence them, and (2) to formulate an extension strategies. Research locations were carried out in Bekasi (West Java) and Brebes (Central Java). The data were collected from July 2010 to October 2010, 200 farmers involved from 457 population with sensus sampling. Data analyzed by using descriptively and structural equations model (SEM). Saveral methods of collecting data were questionnaire, interview, observation and reviewing secondary data and related documents. The research results show that : (1) the competence of farmers at a medium category and influenced by the effectiveness of extension, individual characteristics, and the learning process, (2) Low competence affected productivity, (3) Low productivity was influenced by the institutional support, competence and effectiveness of extension, and (4) Low productivity affected low income. Strategy implemented for developing farmers competence model can be achieved by (a) increasing the effectiveness of extension, (b) increasing learning process, and (c) increasing the institutional support.
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Judul: The relationship between characteristics of seaweed farmers  and their competences in three district of South Sulawesi
Abstrak: Seaweed farmers in this research are the farmers who produce seaweeds (Eucheuma spp) in rural coastal area, as their mayor income. The objective of this study is to determine the degree of rela tionship between individual characteristics of seaweed farmers and their entrepreneurship or business competence. Data were collected in July to October 2006 from 280 seaweed farmers. Data were analyzed by Kendall Concor dance procedures, t-test and Path Analysis. The important results of the study were as follows: (1) majority of the seaweed farmers are young, low educated, family size is sedentary, low family income, low in media utilization and sedentary in experience, motivation and capital (2) Degree of all individual char acteristic showed high correlation or high agreement for rank ten component of farmers competence, and (3) Path analysis procedures shows the managerial competence have and effect on technical competence. The influence found as effect or contributed by motivation, social capital and training variables while from the other side contribute by formal education, land use and income.
Keyword: Eucheuma spp, Kendall Concordance procedures, extension program, technical ability, south Sulawesi

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular