Judul: Desain Media Komunikasi untuk Pendidikan Konservasi Berdasarkan Preferensi Masyarakat dan Efeknya Terhadap Perubahan Pengetahuan, Sikap dan Perilaku Masyarakat di Kawasan Lindung Sungai Lesan, Berau, Kalimantan Timur
Abstrak: Penelitian ini bertujuan mengidentifikasi jenis-jenis media komunikasi untuk pendidikan konservasi berdasarkan media preferensi masyarakat; menyusun dan merancang media komunikasi berdasarkan uji coba media terhadap masyarakat target; mengetahui efek perubahan pengetahuan, sikap dan perilaku masyarakat setelah implementasi media komunikasi; dan mengetahui faktorfaktor yang mempengaruhi efektivitas media komunikasi untuk pendidikan konservasi. Penelitian dilaksanakan di 7 kampung (Kecamatan Kelay) dan kota Tanjung Redeb (Kecamatan Tanjung Redeb) selama 18 bulan dari November 2007 – April 2009 yang dapat dibagi menjadi 3 tahap yaitu: Tahap-1: persiapan untuk mengidentifikasi dan merancang media dan program penjangkauan masyarakat; Tahap-2: implementasi penggunaan berbagai media komunikasi dan program penjangkauan masyarakat; dan Tahap-3: pemantauan dan evaluasi efektivitas media. Tahap persiapan dalam pengumpulan data menggunakan metode lokakarya multi pihak, metode Focus Group Discussion (FGD), survei, menetapkan pesan dan media kampanye. Tahap Implementasi dilakukan untuk menyampaikan pesan melalui berbagai media komunikasi. Tahap pemantauan dan evaluasi media preferensi masyarakat di kampung dan kota Tanjung Redeb, dan mengidentifikasi faktor-faktor yang mempengaruhi, serta seberapa besar tingkat perubahan pengetahuan, sikap dan perilaku masyarakat mengenai konservasi hutan.
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Judul: Efektivitas komunikasi pembangunan pada masyarakat sekitar hutan konservasi Taman Nasional Gunung Halimun Salakunderstanding of community
Abstrak: Nowdays, the conservation forest of National Park of Mt. Halimun Salak (NPMHS), which is managed and utilized by the people surrounding the conservation forest, is beginning to deteriorate because of encroachment and illegal logging, illegal gold mining, violation of management zone, development and illegal land use as a result of the lack of public understanding concerning the utilization and conservation of the forests on NPMHS. The objectives of this research were to (1) analyze the communication effectiveness in improving the understanding of communities around the forest, (2) identify the factors that determine the effectiveness of communication in delivering conservation messages, (3) analyze the relationship between factors that determine the understanding of forest communities and communication effectiveness, and (4) analyze appropriate communication strategies. The results of the study showed that the knowledge of the forest communities in improving physical productivity was in the category of understanding. Their knowledge about land optimization was in the category of very understanding. Their knowledge about the improvement of environmental quality was in the category of very understanding. Also, their knowledge concerning maximizing income was in the category of very understanding. The factors that determined the people's understanding of the use and conservation of forest at NPMHS were the capacity of forest officials, information, communication channels, individual characteristics, and cosmopolitan knowledge of individuals (All of these factors were of good categories). As a whole there were some relationships between the factors that could improve the public understanding and the communication effectiveness: (1) the relationship between the capacity of forest officials and communication effectiveness, (2) the relationship between the information about NPMHS forest conservation and the communication effectiveness, (3) the relationship between communication channels and the communication effectiveness, and (4) the relationship between individual characteristics and the communication effectiveness. The resulted communication strategies were among others, the accuracy, availability and facilities of choices of communication channels for forest communities to select and use to get information about forest utilization and conservation; providing facilities and opportunities for forest communities to access available sources of information and communication channels; forming discussion groups and giving opportunities to the surrounding communities to engage in managing the NPMHS forest conservation.
Keyword: Effectiveness communications, utilization and conservation of forest, understanding of community

Judul: igenvalues and Eigenvectors of Tridiagonal Matrix with Non Constant and Recurrent Diagonal Entries.
Abstrak: Matriks tridiagonal adalah suatu matriks yang mempunyai entri-entri bernilai nol kecuali pada diagonal utama, di bawah diagonal utama (subdiagonal) dan di atas diagonal utama (superdiagonal). Entri pada diagonal utama tidak konstan dan berulang. Setiap entri pada matriks tridiagonal ini adalah bilangan kompleks. Dalam karya ilmiah ini, akan dibuktikan 3 teorema untuk menentukan nilai eigen dengan 2 kasus dan 1 teorema untuk menentukan vektor eigen. Teorema pertama menentukan polinomial karakteristik dari matriks tridiagonal. Polinomial karakteristik dari matriks tridiagonal tersebut digunakan untuk menentukan nilai eigen pada teorema kedua dan ketiga serta menentukan vektor eigen pada teorema keempat
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