Judul: The influence of individual charateristic and the role of extension worker on increasing household food diversification
Abstrak: The Government of Indonesia has launched accelereted diversification of food consumption program (P2KP). This program aims to encourage people in improving food consumption patterns, nutritious, balanced, and safe nutition. Bogor district is one of the districts managing P2KP program. The program involves Food Security and Extension Agency for Agriculture, Fisheries and Forestry (BKP4K) as program implementers. The objectives of the research are: (1) to identify community perceptions of participants and non-participants of P2KP program towards food diversification; (2) to analyze the effect of individual characteristics on community perceptions toward food diversification; (3) to analyze the effect of individual characteristics to the level of diversification of household; (4) to analyze the effect extension role on community perceptions toward food diversification; (5) to analyze the effect of extension of the role on the level of food diversification of household and; (6) to formulate extension strategies to improve household food diversification. Research using ex Post facto design. Field research was conducted in sub District of Dramaga, Cibungbulang and Ciomas of Bogor District West Java Province from February 2013 to June 2013. The data were analyzed qualitatively and quantitatively. Quantitative analysis used descriptive and inferential statistics. The analysis consisted of frequency distributions, while the inferential statistics used stepwise regression analysis based on SPSS 17.0 software. The results showed: (1) perception of P2KP program participants and non participant at the high category with a mean score of 2.97 and 2.73 respectively of a maximum score of 3.0; (2) the individual characteristics that significantly affect perceptions in terms of diversification are: age, formal education and keterdedahan on TV and newspaper media; (3) the individual characteristics that affect the level of food diversification of household is age, education formal and income; (4) the roles of extension personnel as communicator and motivator affected significantly the community perception of food diversification is the role as role as a communicator and motivator; (5) the role of extension personnel did not affect the level of food diversification of household; (6) need to change food diversification extension strategy both in terms of the target extension to the method used, for example the father and adolescents as subjects of education and the use of television media to explain the importance of diversification.
Keyword: diversification of household food, perception, role of extension

Judul: Farmer‟s field school of food diversity acceleration as media communication for food diversity (case of women‟s farmer group in Rural Central Java)
Abstrak: Having achieved the community food diversification program, the government carried out the Acceleration Movement of food Consumption Diversification (P2KP). This movement was promoted with SL-P2KP addressed to woman farmers. Development of food security defined in Law No. 7 of 1996 on Food and Government Regulation (PP) No. 68 of 2002 on Food Security, specifically requires that the government conduct regulation, guidance, control and supervision of availability of adequate food, both in quantity and quality, varied, nutritious, balanced, safe, and affordable by the community. This study aimed : 1) To description the pattern of consumption in the implementation of SL-P2KP, 2) To analyze the effectiveness of communication in the implementation of SL-P2KP, 3) to analyze the relationship between the intensity of farmers' communication in the implementation of SL-P2KP and the behaviour of food consumption diversification. Data collection used questionnaire survey with the 60 members of Woman Farmers following SL-P2KP program since 2010 to optimize the utilization of yard activities (OPP) on the Prambanan district. Group selection is done intentionally (purposive), the reason for his election as the two villages are receiving Food Consumption Acceleration activity (P2KP). Data collection and field observations conducted during the months of July to September 2012. Data analysis was performed using Chi Square test analysis. The results showed that: 1) the communication pattern in the SL-P2KP was communication that generally took place in interactional/two-way interaction in a mixture of Javanese and Indonesian through form letters and posters. The main source of information was the instructor and fellow members of woman farmers, 2) The effectiveness of communication about SL-P2KP was still low, although the affective aspect was sufficient to support farmers. However, there was no changes in the behavior of woman farmers in implementing and applying SL-P2KP. In the implementation of this program can be said that communication is not one of the key aspects of behavior change but also need to see the facilities and local conditions such as climate in determining the behavior of farmers with respect to the SL-P2KP activities. Physical conditions such as the state of the local land barren and dusty soil, the limited availability of seeds and less water. Less intensive socialization of this activity contributed to the lack of success of the P2KP , and the main source of information is an experienced educator and farmer and 3) there was no relationship between the communication intensity and behavior change in SL-P2KP. aspects of knowledge and affection does not significantly affect farmers' behavior change in the SL-P2KP. Society accustomed to eating rice as a main food source, other sources of carbohydrates such as yams, cassava, corn, taro, and arrowroot are still treated as a snack food. The level of knowledge of women farmers SL-P2KP turns almost everything behaves according to what socialized in P2KP. This farmers are often planting activities in the yard of the house that is already socialized government on the activities during this extension. Same thing on affective aspects. Farmers to support this program or not, almost all of them behave accordingly. This was likely to be influenced by the physical
Keyword: SL-P2KP, communication media, food diversification, rural communities

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