Judul: Pengaruh Budaya Organisasi dan Integrasi Rantai Pasok Terhadap Kinerja Petani Sayuran Dataran Tinggi di Kabupaten Tanah Karo
Abstrak: Organizational culture is one of the necessary thing to increase farmer performance in the supply chain of vegetable. The supply chain integration that the farmer do is the activity to make interrelationship among supply chain parties in which it has got a purpose to get a benefit and profitability. This research was conducted in Tanah Karo Regency, Sumatera Utara, that intent on : 1) To analyze organizational culture in the farmer groups in Tanah Karo Regency, Sumatera Utara; 2) To analyze farmer performance in Tanah Karo Regency, Sumatera Utara; 3) To analyze supply chain integration of the farmer in Tanah Karo, Sumatera Utara; 4) To analyze influence of organizational culture and supply chain integration on performanace of the farmer who is involved in the farmer groups in Tanah Karo Regency, Sumatera Utara. The number of samples in this research is 45 respondents in which they are the farmer who is involved in the farmer groups. The data collection methods are using interviews, observation, literature study, and internet. This research, the data is analyzed with the descriptive analysis and Structural Equation Modeling (SEM) with Smart Partial Least Square 2.0 approach. The result of analysis suggest that organizational culture and supply chain integration have a positive and significant influence on famer’s performance in which organizational culture as a moderating variable so the correlation between supply chain integration and performance will be reinforced well if it has a good organizational culture.
Keyword: supply chain integration., organizational culture, farmer’s performance

Judul: Analisis Hubungan Gaya Kepemimpinan dengan Kinerja Kelompok Tani (Studi Kasus : Kelompok Tani Ternak Karya Sejahtera, Desa Karyawangi, Kecamatan Parongpong, Kabupaten Bandung Barat)
Abstrak: Revitalization of Agriculture, Fisheries and Forestry (RPPK) is one of the Triple Track Strategy of the government in order to reduce poverty and unemployment and improving the competitiveness of the national economy and preserve agricultural resources, fisheries and forestry. Development of farmer groups become an important part of the application by directing the agribusiness system, an increase in the role of leadership, the participation of farmers and other rural community members. This research was conducted to analyze the leadership style, the factors which drive leadership style, performance farmer groups, and the relationship with the leadership style of performance Karya Sejahtera farmer groups, in Karyawangi Village, Parongpong Subdistrict, West Bandung. The method used in this study is the Non-Probability Sampling, descriptive statistical analysis, and the Spearman rank correlation test. The results of this study indicate that the leadership style adopted by the laeder of Karya Sejahtera farmer group is a participative leadership style. Based on the descriptive statistical analysis of Karya Sejahtera farmer groups had an average score of moderate (3.45). Based on rank spearman test there are any relation betwen leaddership style of the group leader and Karya Sejahtera farmer group.
Keyword: performance, farmer group, leadership

Judul: The Exploration of Discrete Logarithm over Finite Field GF(3m)
Abstrak: The security of many public~key algorithms is based on the problem of finding discrete logarithms. The generalized discrete logarithm problem is the following: given a finite cyclic group G of order n, a generator a of G, and an element fl E G, find the integer x, 0 ~ x ~ n - 1, such that 0: = fl. Algorithm for discrete logarithm problem focused on Menezes et al. (1997) that consist of exhaustive search algorithm, the baby-step giant-step algorithm, Pollard's rho algorithm, Pohlig-Hellman algorithm, and index-calculus algorithm. These algorithms are explorated to be used in discrete logarithm problem over finite field GF(3m ). The exploration also produces some algorithms, i.e. naif negative algorithm, baby-step mother-step algorithm, baby-step mother free-step algorithm, and baby-step free-step algorithm. All algorithms implemented using Maple 11. The Pohlig-Hellman and baby-step giant-step algorithms are efficient enough to be used in discrete logarithm problem over finite field GF(3m ) for m < 20.
Keyword: