Judul: The level of farmer’s self reliance in making decision for business of food crops in Bogor District
Abstrak: Food crop farmers is a profession that is known to a person whom doing food crops (rice and cash crops). Therefore, strengthening the farmer’s selfreliance is one of the important efforts in farmer-resource-based agricultural revitalization. Problems of agribusiness that have been existed in Bogor District, such as: small land owned farmers, low farmer income, utilization of simple tools for crop cultivation, low ability of farmers in applying new agro-technology and adopting innovation, farmers having low capital for carrying out agribusiness, and very few knowledge of farmers about postharvest processing and marketing are the reasons why farmer’s self-reliance in business of food crops is becoming very important to be increased. Based on the problems in Bogor District, research objectives are: (1) describing the level of farmers self-relience in making decision for business of food crops in Bogor District, (2) describing the characteristics of farmers in making decision for business of food crops in Bogor District, (3) describing the agricultural extension activities food crops in Bogor District, and (4) analyzing the factors that related to self-reliance of farmers in making decision for business of food crops in Bogor District. Research was carried out based on quantitative approach through descriptive explanatory survey. Total population of the farmers in studied areas was 12.838 people which have been existed in four farmer groups settled in Sub-districts of Pamijahan, Cigudeg, Cariu, and Tanjung Sari. Of 12.838 farmers, 154 people were determined as a number of research samples (respondent) that chose by using Slovin formula. Method of proportionate simple random sampling was used for getting the samples. Primary and secondary data were collected by using the instruments based on an operational definition of each research variable. Primary data were collected through a survey technique using questionnaires, interviews, observations and documentations, and some were directly recorded as daily notes. Secondary data were mainly taken from Local Government of Bogor District, i.e.: Statistics of Bogor District and of Pamijahan, Cigudeg, Cariu and Tanjung Sari Sub-districts, and some were cited from several reports. Data analyses were focused on descriptive statistical analysis consisting of frequency, percentage, mean value, sum of mean score and cross tabulations and inferential statistical analysis for determining the coefficient of Spearman rank correlation (rs). SPSS program for Windows of 19.00 versions was used for data tabulations. Questionnaire trial was conducted on 30 respondents excluding the determined samples, but they have the same characteristics; whereas test of validity was carried out by using the Pearson product moment correlation, from which 117 valid questions (rcalculation: 0.361 > rtable 0.3) were resulted, and test of reliability was done by using the method of Cronbach Alpha with the reliable results of (rcalculation: 0.643; 0.887; 0.916; 0.865 > rtable 0.60). Research results showed that: (1) the level of farmer’s self-reliance in making decisions for business of food crops, particularly in providing infrastructures and production inputs, food crop cultivation and post-harvest processing, could be categorized as high, except in marketing which is still low; (2) the food crop farmers in study areas have several characteristics, as follow: a productive age with the mean value of
Keyword: self-reliance, extension, business of food crops

Judul: Factors Affecting Farmers Decisions in Switching Professions to Non Farmers (Case study: Rice Farmers in Pamijahan District, Bogor)
Abstrak: Kecamatan Pamijahan sebagai sentra produksi padi ketiga di Kabupaten Bogor mengalami permasalahan perubahan struktur tenaga kerja dan mengalami penurunan jumlah tenaga kerja sektor pertanian. Peralihan profesi tersebut dapat berdampak pada menurunnya produksi padi di Kecamatan Pamijahan. Penelitian ini bertujuan untuk: (1) menganalisis persepsi petani padi terhadap manfaat usahatani bagi keluarga petani; (2) menganalisis tingkat pendapatan usahatani padi; (3) menganalisis faktor-faktor yang memengaruhi keputusan petani dalam bertahan atau beralih profesi ke non petani di Kecamatan Pamijahan. Penelitian ini mengggunakan metode analisis deskriptif (skala Likert), analisis pendapatan, dan regresi logistik biner. Hasil penelitian ini menunjukan bahwa: (1) mayoritas petani setuju bahwa pertanian padi sawah memberikan manfaat terkait dengan aspek ekonomi, sosial, dan lingkungan bagi keluarga petani; (2) Usahatani padi di Kecamatan Pamijahan menguntungkan dan layak untuk diusahakan; (3) faktor-faktor yang memengaruhi keputusan petani untuk tetap bertahan sebagai petani yaitu kategori pendapatan dari usaha pertanian, jumlah tanggungan keluarga, dan pengalaman bertani. Sementara, faktor-faktor yang memengaruhi keputusan petani untuk beralih profesi ke non petani yaitu kategori luas lahan pertanian dan kesempatan bekerja di sektor non petanian., Pamijahan District as the production center of the structures in Bogor Regency has experienced labor change problems and has experienced a decrease in the number of workers in the agricultural sector. This shift in professions could have an impact on decreasing rice production in the Pamijahan District. This study aims to: (1) analyze perceptions of paddy farmer’s on benefits of farming for farmer’s household; (2) analyze the income level of rice farming and (3) analyze the factors that influence farmer decission in stay as farmer or switching professions to non farmer’s in Pamijahan District. This study use likert scale method, income analysis, and binary logistic regression. The result showed that: (1) the majority of farmers agreed that rice field farming provides benefits to farmer’s household; (2) the rice farming in Pamijahan District is profitable because the R/C ratio for farm income over cash and total costs is greater than one and (3) factors that influence farmer’s decission to stay as farmer are income from agricultural business, number of family members and farming experience, meanwhile factors that influence farmer’s decission to switch professions to non farmer’s are agricultural land area and employment opportunities in non-agricultural sector.
Keyword: binary logistic regression, farmer’s decission, income analysis

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