Judul: Deflection analysis at the proportional and maximum limit on cross laminated timber from sengon (paraserianthes falcataria l. Nielsen) and manii (maesopsis eminii engl.)
Abstrak: Cross Laminated Timber (CLT) merupakan papan laminasi yang pada saat ini sudah dapat digunakan sebagai komponen bangunan rumah, dek jembatan, hingga struktur utama gedung bertingkat. Tujuan penelitian ini untuk menentukan besar pengaruh kombinasi tebal dan orientasi sudut lamina terhadap defleksi pada batas proporsional dan maksimum panel CLT menggunakan sambungan paku dan perekat. Data mekanis yang diolah yaitu besar beban dan defleksi pada batas proporsional dan maksimum dari kurva gaya-defleksi panel CLT yang dibebani lentur statis. Hasil penelitian menunjukkan perlakuan kombinasi tebal dan orientasi sudut tidak mempengaruhi defleksi untuk setiap jenis panel CLT. Defleksi memiliki nilai kisaran yang kecil sehingga sulit untuk menentukan faktor yang mempengaruhi besar defleksi tersebut. Selain itu berdasarkan seluruh hasil yang didapat bahwa pada penggunaan sambungan panel CLT, perekat merupakan sambungan yang paling stabil dibandingkan sambungan paku., Cross Laminated Timber (CLT) is a wood composed product of some lamina that used these days for house component, bridge deck, and main structure for multistoried buildings. The purpose of this research determined the influence of lamina thickness combination and angle orientation toward deflection at the proportional and maximum limit on CLT panel using nails and adhesive connections. Mechanic data which processed is loading value and deflection on proportional and maximum limit from deflection force curve from CLT panel from static loading. The result of this research showed the treatment combination of thickness and laminated angle orientation did not affect deflection for each type of CLT panels. Deflection has a small range of values therefore difficult to determine factors that affected deflection. In addition, based on all the results obtained that the use of CLT panel connections, the adhesive is the most stable than a nail connection.
Keyword: batas maksimum, batas proporsional, beban, CLT, defleksi

Judul: Pengembangan Produk Cross Laminated Timber Melalui Pemanfaatan Kayu Sengon (Falcataria moluccana (Miq.) Barneby & J. W. Grimes) Menggunakan Sambungan Paku
Abstrak: The availability of good quality and big diameter wood in the natural forest, recently keep decreasing. It makes consumer should turn into public forest to fulfill their needs. However, low quality wood from public forest can be modified into product creation for structural material with high quality, which is cross laminated timber (CLT). CLT is created by arranging 3 to 7 laminas are crossed and then glued and compressed hydraulically on the entire surface or can be nailed (Perkins and McCloskey 2010). One of CLT product modification is by doing of combination lamina thickness and orientation angle. This study was aimed to determine the effect of thickness and orientation angle lamina comnbinations to the cross laminated timber panel product of Sengon wood (Falcataria moluccana (Miq.) Barneby & J. W. Grimes) by using nail connection. The average of nail CLT panel density (0.37 g/cm3) larger than control board and adhesive CLT. The average of nail CLT panel moisture content (4.19%) lower than control board and higher than adhesive CLT and not far different from the average of Bogor moisture content ±15%. The volume shrinkage of nail CLT panel (5.07%) is lower than control board and adhesive CLT, but it‟s not far different. The average of volume swelling nail CLT panel (3.74%) lower than control board and adhesive CLT. The average of MOE nail CLT panel is only 20% from control board and only about 15% from adhesive CLT and MOR. Nail CLT nail panel is able to reach 82% from control board and about 78% from adhesive CLT. The MOR of nail CLT panel is good but MOE isn‟t better than adhesive CLT. The average of lateral force nail CLT panel, smaller than stated by PPKI 1961. The average of shear strength nail CLT panel is larger than adhesive CLT panel. CLT panel with laminas 1,67 cm is the most optimum panel according to all tests result
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Judul: Daerah penyebaran dan variasi morfologi ular putih (Micropechis ikaheka) di Papua
Abstrak: The objectives of the research were to identify the area of distribution and the specific habitat of the white snake (Micropechis ikaheka) in Papua (Western New Guinea), and also to explain the morphological variation among the populations of that snake. About eight months of field work were taken to conduct the survey (April 2002; June 2006; and March to Augusts 2007) in several areas in the mainland and off-shore islands of Papua. Observation were carried out in the field at night and during the day to collect the snake. Also, studies were done on a collection of specimens that were found in the Museum Zoologicum Bogoriense LIPI in Cibinong, Conservation International in Jayapura and the Biology Laboratory of the Papua State University in Manokwari. The results showed that the white snake Micropechis ikaheka can be divided into three separate groups based on the color of the scales, i.e. Black, Brown and Yellow. The black one is the new group found in this research, and also there was one individual snake with transitional coloration between the brown group and the yellow group. However, M. ikaheka is common and has a relatively wide distribution in New Guinea, but every group has a specific and limited area of distribution. The group with black color is distributed in the islands of Waigeo and Batanta and the group with yellow color is distributed starting from Manokwari, Sorong, upto the islands of Salawati, Batanta and Waigeo. Meanwhile, the brown colored sanke is distributed from the island of Yapen, mainland of waropen, Mamberamo, Jayawijaya, Mindiptana upto Papua New Guinea.
Keyword: The white snake, Micropechis ikaheka, Are of distribution, Morphological variation, Famili Elopidae