Judul: Social Capital of Bukit Amanah Village Forest Management Institution (LMDH) Youth Group on Puntang Coffee Business in Bandung Regency
Abstrak: Perhutanan Sosial di LMDH Bukit Amanah diimplementasikan melalui usaha budidaya kopi pola agroforestri dan pengolahan produk kopi. Kelompok pemuda diberi tangung jawab bisnis pengolahan dan pemasaran kopi. Modal sosial menjadi salah satu modal kelompok pemuda untuk mencapai keberhasilan pemasaran produk. Penelitian bertujuan untuk menjelaskan hubungan modal sosial kelompok pemuda dengan kinerja pemasaran produk kopi puntang. Penelitian dilakukan terhadap 20 orang pemuda anggota LMDH Bukit Amanah. Hasil penelitian menunjukkan bahwa kelompok pemuda memiliki kekuatan modal sosial mengikat, modal sosial menghubungkan, dan modal sosial menjembatani. Namun demikian, kemampuan berjejaring (modal sosial menjembatani) khususnya dalam pemasaran masih terbatas. Pemasaran kopi belum dapat menembus ke konsumen baru, sehingga kinerja pemasaran cenderung tetap, bahkan mengalami penurunan. Peningkatan kemampuan komunikasi interpersonal sebagai dasar untuk membangun jaringan sosial yang lebih luas meningkatkan kinerja pemasaran Kopi Puntang., Social Forestry in LMDH Bukit Amanah is implemented through agroforestry coffee cultivation and coffee product processing. The youth group is responsible for the coffee processing and marketing business. Social capital is one of the youth groups' capital to achieve product marketing success. The study aimed to explain the relationship between youth groups' social capital and Puntang coffee products' marketing performance. The research was conducted on 20 youth members of LMDH Bukit Amanah. The results showed that the youth group has the strength of binding social capital, connecting social capital, and bridging social capital. However, the ability to network (bridging social capital), especially in marketing, still needs to be improved. Coffee marketing has not been able to penetrate new consumers, so marketing performance tends to remain, even experiencing a decline. Improving interpersonal communication skills as a basis for building a wider social network improves the marketing performance of Puntang Coffee.
Keyword: LMDH, Agroforestry coffee, Social capital, Youth Group

Judul: The Leadership of coffee farmers
Abstrak: Kopi merupakan komoditas hasil perkebunan yang memiliki kontribusi besar terhadap perekonomian negara. Sumatera Selatan merupakan penghasil kopi terbesar di Indonesia. Secara sosiologis petani kopi di daerah ini cenderung hidup berkelompok dan melahirkan budaya serta norma tersendiri untuk menjaga dinamika dalam sosialnya. Penelitian bertujuan menggali modal kepemimpinan yang dimiliki oleh Ketua Talang sebagai pemimpin lokal kelompok petani kopi serta dinamika dalam kelompok sosialnya. Metode yang digunakan untuk menggali fakta, data, dan informasi dalam penelitian ini adalah pendekatan kuantitatif yang didukung data kualitatif dengan responden sebanyak 37 orang. Hasil penelitian menunjukkan bahwa terdapat hubungan negatif antara modal kepemimpinan terhadap dinamika sosial. Modal kepemimpinan yang dimiliki ketua talang tergolong tinggi dan dinamika sosial yang terjadi tergolong rendah. Terdapat hubungan positif antara modal kepemimpinan terhadap indikator pengendalian sosial dan mobilitas sosial serta terdapat hubungan negatif antara modal kepemimpinan dengan indikator penyimpangan sosial dan perubahan sosial., Coffee is a plantation commodity that has a major contribution to the country's economy. South Sumatera is the largest coffee producer in Indonesia. Sociologically, coffee farmers in this area tend to live in groups and produce their own culture and norms to maintain social dynamics. This study aims to explore the leadership capital possessed by the head of the Talang as a local leader of the coffee farmer group and the dynamics of the social group. The method used to explore facts, data, and information in this study is a quantitative approach supported by qualitative data with 37 respondents. The results obtained indicate that there is a negative relationship between leadership capital and social dynamics. The leadership capital owned by the head of the gutter is high and the social dynamics that occur are low. There is a positive correlaton between leadership capital on indicators of social control and social mobility and there is a negative relationship between leadership capital and indicators of social deviation and social change.
Keyword: coffee farmer, group dynamics, leadership capital

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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