Judul: Keawetan Cross Laminated Timber dari Batang Kelapa Sawit (Elaeis guineensis Jacq) pada Berbagai Orientasi Serat.
Abstrak: Lack of raw materials wood push us to make an alternative raw materials a substitute for wood. On the other hand, the longer period the more palm oil plantations (Elaesis guineensis Jacq) resulted in the waste of palm trunks wasted any more. It also spurred us to utilize waste stems of palm by making a cross laminated timber. The purpose of this study was to test the durability of natural cross laminated timber from oil palm trunks on a variety of fiber orientation. Testing is done by the method of JIS K 1571-2004. The results shows that orientation fibers not affect to the weight loss, mortality, and feeding rate. Form of termite attacks tend to spread but the hole following the orientation of fibers. Cross laminated timber to the orientation angles 30o, 45o, 60o, and 90o there are attack from the direction of the side of a test sample. Based on SNI 01.7202.2006, durability of palm trunks against termite attack belong to the durability of a very bad while cross laminated timber from oil palm trunk belongs to the bad durability.
Keyword: preservation, ground termites, palm oil, cross laminated timber, Bogor Agricultural University (IPB)

Judul: Characteristic of Cross Laminated Lumber from Oil Palm Trunk Waste
Abstrak: Tanaman kelapa sawit memiliki umur produktif 25-30 tahun. Tanaman kelapa sawit yang sudah tidak produktif lagi akan ditebang dan batangnya selama ini hanya dibiarkan begitu saja di lahan perkebunan sehingga dapat menjadi sarang hama bagi tanaman kelapa sawit lainnya., Palm plants have a relatively short life span about 25-30 years old. Palm plants are no longer productive will be cut down and the trunk only left on the farm and can be source of disease for the other oil palm plants.
Keyword: oil palm trunk waste, cross laminated lumber, isocyanate adhesive, physical-mechanical properties, grave yard test

Judul: Mathematical Analysis of a Cholera Spread Infection Model  Using Vaccination
Abstrak: Kolera merupakan penyakit diare yang disebabkan infeksi pada usus oleh bakteri Vibrio cholerae. Bakteri tersebut masuk ke dalam tubuh seseorang melalui makanan dan minuman yang telah terkontaminasi yang akan mengeluarkan enterotoksin di dalam tubuh seseorang pada bagian saluran usus, sehingga menimbulkan diare disertai muntah yang akut dan sangat hebat, dan berakibat seseorang dalam waktu hanya beberapa hari akan kehilangan banyak cairan dalam tubuhnya sehingga mengalami dehidrasi. Penelitian ini bertujuan untuk menganalisis model untuk penyebaran infeksi kolera menggunakan vaksinasi. Terdapat dua titik tetap, yaitu titik tetap bebas penyakit dan titik tetap endemik. Pada simulasi numerik jika nilai reproduksi dasar yakni ℛ0 < 1 maka jumlah individu yang terinfeksi akan berkurang sehingga penyakit hilang. dst.., Cholera is a diarrheal disease caused by infection of the intestine by the bacterium Vibrio cholerae. These bacteria enter a person's body through contaminated food and drink, which will release enterotoxins in a person's body in the intestinal tract, causing diarrhea accompanied by acute and very severe vomiting, and resulting in a person just in a few days of losing a lot of fluids in the body so it becomes dehydrated. This study aims to analyze a model for the spread of cholera infection using vaccination. dst ..
Keyword: fungsi Lyapunov, infeksi kolera, vaksinasi