Judul: Pendugaan Parameter Demografi dan Sebaran Spasial Aktivitas Surili (Presbytis comata) di Blok Hutan Sigedong, Taman Nasional Gunung Ciremai.
Abstrak: Surili (Presbytis comata) telah ditetapkan sebagai salah satu satwa yang dilindungi. Untuk melestarikan surili diperlukan informasi tentang parameter demografi dan sebaran spasial aktivitasnya. Penelitian ini dilakukan pada bulan Maret-April 2017 di Blok Hutan Sigedong, Taman Nasional Gunung Ciremai. Pengamatan surili dilaksanakan pada pagi hari pukul 06.00-10.00 WIB dan sore hari pukul 15.00-18.00 WIB. Data mengenai parameter demografi diperoleh dengan metode titik konsentrasi dan kamera jebak. Data untuk sebaran spasial aktivitas surili dengan metode pengamatan aktivitas langsung dan metode analisis vegetasi untuk jumlah jenis tumbuhan yang dimanfaatkan. Hasil pengamatan menunjukkan bahwa terdapat 9 kelompok surili dengan total individu 42 individu. Nilai sex ratio sebesar 1: 1.31, angka kelahiran 0.238, dan angka kematian pada remaja-dewasa yaitu 0.769. Jenis aktivitasnya berkelompok, makan, istirahat dan mencari tempat berteduh yang tersebar di empat jenis vegetasi yaitu perkebunan, ladang, hutan rimba dan semak belukar.
Keyword: Blok Hutan Sigedong, parameter demografi, sebaran spasial aktivitas, surili

Judul: Pendugaan Parameter Demografi dan Pola Penggunaan Ruang Surili (Presbytis comata) di Taman Nasional Gunung Ciremai
Abstrak: Surili is an endemic primates of West Java. Its status is protected species based on PP. 7 of 1999, endangered species (IUCN) as well as classified in to Appendix II category, CITES. Data about demography parameter and use space pattern of Surili in Ciremai Mount National Park is necessary as one of the basic case in area management, including for species management, habitat development, drafting or revision zoning and the national park management plan. The research aimed to observation estimate of demography parameter of Surili in Ciremai Mount National Park Area which includes population size, natality, mortality, sex ratio and age composition and to identify use spatial pattern of surili there. Research was conducted at the Ciremai Mount National Park area for five months from Oktober 2012 to Februari 2013. As many as 28 observation points of demography parameter, and 4 points observation of its daily use space pattern. Data of demography parameter taken by concentration count method and data of use spatial pattern taken by focal animal sampling method. Total number of individuals from 28 points observation as many as 164 individuals, with the distribution of 48 individuals in the lowland forest with an average group size (8.00 ± 4.50), 56 individuals in the sub-montane forest with an average group size (5.6 ± 2.49) and 60 individuals in the mountain forest with an average group size (5.00 ± 2.07). Sex ratio total at 28 observation points was 1 : 2, with annual age (Adult : Adult Hood : Kid) 7 : 10 : 11. Value of total natality at 28 observation points was 0.125, with highest mortality value from adult hood to adult was 0,34 . Average of Surili daily cruising area in block Haurcucuk (representative type of lowland forest) was 1.13 ha, with an average daily track length of 516.80 m. Block Kalawija and Saninten (representative type of sub-montane forest), their average daily ranges in series were 2.08 ha and 3.32 ha, with an average daily track length of 935.25 m and 1092.29 m. Next on the block Cigowong (representative type of mountain forests), its average daily cruising area was 5.48 ha, with average daily track length was 1188,3m.
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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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