Judul: Efektivitas Komunikasi Pemuka Pendapat Kelompok Tani Dalam Menggunakan Teknologi Usahatani Padi (Kasus di Kecamatan Kupang Tengah Kabupaten Kupang NTT)
Abstrak: Research objectives were: (1) to expose opinion leader characteristics, as well as using information source, (2) to detect communication effectiveness among opinion leader, (3) to evaluate applying rice farming technology, (4) to relationship among characteristics, information source, and frequency leader to leader employing, communication effectiveness practicing rice technology to farmer at Kupang Tengah district Kupang regency Nusa Tenggara Timur province. Research was designed in descriptive correlation survey method. The data was collecting during March to May 2008. population was the entire opinion leader from 5 rice farmer groups. Total respondents were 99 persons. Data was analyzed by employing rank Spearman statistical test. Result indicated: (1) leader characteristics was potentially enough to apply rice technology, (2) employing mass media as source of information was a little bit poor, (3) introducting rice technology by leader, indicating more effective, (4) several characteristics factors which are significantly correlated positively as well as negatively to communication effectiveness: social participation, formal education, family size, attitude, social status, farm size, using mass media and contact to extension agent.
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Judul: Efektivitas Media Komunikasi Bagi Petani Padi di Kecamatan Gandus Kota Palembang (Kasus Program Ketahanan Pangan)
Abstrak: Media communication is a channel or path through which messages to get to the audiences. Communication to be effective if it can have an impact that are to reach the knowledge, attitudes and actions of audience. On the cognitive effects include increased awareness, learning and additional knowledge. Affective include effects associated with emotions, feelings and attitudes. Conative include effects associated with the behavior and intentions to do something in a certain way rightly. The research was carried out in June until August 2012. The objectives of the research were : 1) to identify factors correlated to the effectiveness of media communication for the rice farmers, 2) to measure effectiveness of media communications for the rice farmers, 3) to analyze the correlation between media exposure and effectiveness of media communications, 4) to analyze the correlation between media communications evaluated and effectiveness of media communication. The location of the sample was determined purposively. The number of the farmers were 76 taken by simple random sampling. The important research findings were : 1) factors correlated to the effectiveness of media communication for the farmers rice are age, experiences, television exposure, and appropriateness of object matters given by the needs of the farmers, 2) Food security in Gandus is considered as in good category.
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Judul: Invers Drazin dari Matriks Toeplitz Singular
Abstrak: Matriks Toeplitz adalah matriks yang setiap unsur pada diagonal utama bernilai sama dan setiap unsur pada subdiagonal yang bersesuaian dengan diagonal utama juga bernilai sama. Matriks singular adalah matriks yang tidak bisa ditentukan inversnya. Akan tetapi, dapat diupayakan untuk ditentukan inversnya menggunakan invers matriks yang diperumum. Invers Drazin merupakan salah satu jenis invers matriks yang diperumum. Pada karya ilmiah ini ditentukan invers Drazin dari matriks Toeplitz singular dengan menggunakan metode Leverrier Faddeev. Kemudian, ditentukan invers Drazin dari matriks Toeplitz singular yang direpresentasikan sebagai penjumlahan segitiga bawah dan segitiga atas matriks Toeplitz berdasar pada teorema Gohberg dan Semencul., Toeplitz matrix is a matrix in with element on the main diagonal has the same value and on the subdiagonal corresponding to the main diagonal also has the same value. Singular matrix is a matrix that has no inverse. However, it can be attempted to determine the inverse using a generalized inverse matrix. Inverse Drazin is a type of generalized matrix inverse. This paper discussed the inverse Drazin for a singular Toeplitz matrix using the Leverrier Faddeev method. Then, the Drazin inverse of the singular Toeplitz matrix which is represented as a sum of products of lower and upper triangular Toeplitz matrix based on Gohberg and Semencul theorem.
Keyword: inverse Drazine, singular Toeplitz matrix