Judul: Pengaruh Penguasaan Lahan terhadap Stratifikasi Sosial Rumahtangga Petani
Abstrak: Land tenure is one of the terms in the agrarian structure refers to the effective tenurial. For rural people who majority work in agriculture, the land becomes a thing that valuable. This allows the layering of society based on the rule of the land. This study aims to describe the influence of external factors and internal factors to the mastery of the land of the hamlet Margajaya and the hamlet of Karanglo, describes the form and indicators of social stratification of the Margajaya hamlet and the Karanglo hamlet, as well as analyze the effect of land tenure to social stratification of the Margajaya hamlet and the Karanglo hamlet. This research carried out in the Margajaya hamlet and the Karanglo hamlet, Tonggara village uses the quantitative method supported a qualitative data. The results showed that internal factors do not affect the land tenure in both hamlets. Both the village has three forms of stratification, i.e. poor, medium, rich, with an each indicators. Land tenure impact significantly to social stratification in both hamlets.
Keyword: social stratification, peasant, land tenure

Judul: Pengaruh penguasaan lahan terhadap kondisi sosial ekonomi masyarakat (kasus: kampung Cijengkol, desa Cigudeg, kecamatan Cigudeg, kabupaten Bogor, provinsi Jawa Barat)
Abstrak: Land is the most important, high value, and become the source of life and the place of the all human activities. Every human activity needs a certain space located above the ground. Availability of land from time to time are relatively fixed, but the human needs for the the soil have increased time by time. The growing population pressure led to the need for land is increasing. However, the actual problems of land tenure is seen as a problem concern of social relations, economics, and politics which is associated with wealth, income, economic opportunity, social status and political domination among human. Therefore, this study is about how the influence of tenure to the socio-economic conditions of villagers. The purpose of this study was to determine, identify and analyze 1) the factors that affect land tenure, 2) relationship factors to the land tenure’s level, and 3) the influence of tenure to socio-economic conditions of the villagers. This study used qualitativef approach supported by quantitative approache by using kuesioner, observation in the field and in-depth interviews. The results of this study are 1) there are factors that influenced the acquisition of land in Kampung Cijengkol which is the system of inheritance and a lack of capital, 2) there is a relationship between factors that affect the tenure mastery of the land in Kampung Cijengkol, and 3) there is a relationship mastery level on the socioeconomic conditions of land which is seen from the land that affect the level of income, education level and ownership of assets and capital.
Keyword: 

Judul: Desain dan Uji Kinerja Evaporator Berparafin untuk Aplikasi Mini Chiller.
Abstrak: Penelitian ini bertujuan untuk meningkatkan efektivitas sistem pendingin sehingga tercapai peningkatan Coefficient of Performance (COP) dari mini chiller dengan menggunakan evaporator berparafin sebagai cool thermal energy storage. Parafin bekerja dengan prinsip penyimpanan kalor sensibel yaitu memanfaatkan kapasitas termal dan perubahan suhu selama proses dan penyimpanan kalor. Pengujian parafin sebagai cool thermal energy storage dilakukan dengan cara mematikan kompresor ketika suhu air dalam sistem pendingin konstan dan akan dinyalakan kembali ketika suhu air berubah dengan delta suhu sekitar 2 ̊C sampai dengan 3 ̊C. Pengujian performasi evaporator berparafin pada mini chiller dilakukan dengan variasi tekanan dan laju aliran air. Variasi tekanan setelah needle valve diatur dari 1 bar sampai 2 bar dengan selisih 0.5 bar setiap pengujian dan variasi laju aliran air dingin dan laju aliran air panas diatur dari 1 l/menit sampai 3 l/menit dengan selisis 0.5 l/menit. Persentase penghematan energi oleh evaporator berparafin pada semua variasi tekanan relatif sama berkisar antara 17% sampai dengan 33%. Persentase penghematan terbesar pada tekanan setelah needle valve 1 bar dan 1.5 bar ditunjukan pada laju aliran air sebesar 3 l/menit yaitu sebesar 33.6% dan 31.51%. Sedangkan pada variasi tekanan setelah needle valve 3 bar persentase penghematan terbesar terjadi pada laju aliran 2.5 l/menit dan pada laju aliran 3 l/menit terjadi persentase pengghematan terkecil yaitu sebesar 24.75%. Nilai kalor tertinggi yang dapat disimpan parafin yaitu 30.03 watt pada variasi tekanan setelah needle valve 2 bar dan laju aliran air 1 l/menit. Pada variasi tekanan setelah needle valve 1 bar COP rata-rata yang dihasilkan sebesar 2.5. Pada variasi tekanan setelah needle valve 1.5 bar COP rata-rata yang dihasilkan sebesar 2.4. Pada variasi tekanan setelah needle valve 2 bar COP ratarata yang dihasilkan sebesar 3. Nilai COP terbaik didapatkan pada tekanan setelah needle valve 2 bar dengan laju aliran 1 l/menit.
Keyword: COP, evaporator, mini chiller, parafin, thermal energy storage