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: Social Forestry Business Development (Study Case of  LMDH Sasaka Patengan at KPH South Bandung)
Abstrak: The formation of KUPS in social forestry programs is expected to be able to increase business capacity to farmer welfare. This study aims to analyze the management and social forestry business development carried out by members of LMDH Sasaka Patengan. The method used is descriptive statistical analysis with 50 LMDH members and 17 marketing agencies as respondents. The planting pattern is done in agroforestry with a combination of eucalyptus, pine, coffee, avocado, orange, hot chili and Dutch eggplant. The results of the research, business management carried out includes land preparation, seed procurement, planting, maintenance, harvesting, and marketing. In product processing, there is still potential to develop business in commodities other than coffee, those are avocados, oranges, hot chilies and Dutch eggplant into high-value products. The high production potential of farming management needs to be balanced with an efficient marketing system as a strategy in developing the business. An efficient marketing channel to market the products is channel 2 (farmers – collectors – retailers – consumers) with a marketing margin total and marketing costs total which is lower as well as the value of farmer's share and a higher profit to cost ratio from channel 1 (farmers – collectors - wholesalers – retailers – consumers)., Pembentukan KUPS dalam program perhutanan sosial diharap mampu meningkatkan kapasitas usaha demi kesejahteraan petani. Penelitian ini bertujuan menganalisis pengelolaan dan pengembangan usaha perhutanan sosial yang dilakukan anggota LMDH Sasaka Patengan. Metode yang digunakan yaitu analisis statistik deskriptif dengan responden 50 anggota LMDH dan 17 lembaga pemasaran. Pola penanaman dilakukan secara agroforestri dengan kombinasi antara kayu putih, pinus, kopi, alpukat, jeruk, cabai gendot dan terong kori. Berdasarkan hasil penelitian, pengelolaannya meliputi kegiatan penyiapan lahan, pengadaan bibit, penanaman, pemeliharaan, pemanenan, dan pemasaran. Dalam pengelolaan masih ada potensi mengembangkan usaha pada komoditas selain kopi, yaitu alpukat, jeruk, cabai gendot dan terong kori menjadi produk bernilai tinggi. Potensi produksi yang tinggi perlu diimbangi dengan sistem pemasaran yang efisien sebagai strategi mengembangkan usaha. Saluran pemasaran yang efisien untuk memasarkan seluruh komoditas adalah saluran pemasaran 2 (petani – pedagang pengumpul – pedagang eceran – konsumen) dengan total marjin pemasaran dan total biaya pemasaran lebih rendah serta nilai farmer’s share dan rasio keuntungan terhadap biaya lebih besar dari saluran pemasaran 1 (petani – pedagang pengumpul – pedagang besar – pedagang eceran – konsumen).
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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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