Judul: Kualitas Papan Serat Berkerapatan Sedang dari Tandan Kosong Kelapa Sawit dengan Perlakuan Konsentrasi Alkali, Waktu Penggilingan dan Perekat Alami
Abstrak: This research was about fiber board which made from the raw material of empty oil palm bunches.This fiber board was made by using fizzy fire or addingalkali (NaOH) method to the fiber of empty oil palm bunches with the different concentration of 10% and 12%. Then the next process was milling with Hollander beater by the treatment of different time between half an hour and an hour. Pulp that has been obtained was continued to the next process, that was formation of fiber board, before the pulp was formed to be fiber board, it was added the adhesive material from tannin with different concentration those were 2%, 4%, 6% and 8%. The adhesive material then mixed to the pulp, after that it was felted by cold press, and continued by hot pressed. Fiber board that has been done then cutted form pattern, and it was tested based on JIS A5905-2003. The three variables mentioned above had effected to the quality of the fiber board.
Keyword: JIS A5905-2003, Tannin, Middle Density Fiberboard, Empty Oil Palm Bunches

Judul: Fortifikasi Likuida Tandan Kosong Sawit (Elaeis guinensis Jacq.) dengan Fenol Formaldehida dalam Pembuatan Papan Partikel
Abstrak: Oil palm is the largest plantation commodity in Indonesia. The main product of oil palm processing is crude palm oil and palm kernel oil. The procesing of oil palm generated solid waste of empty fruit bunch that very potential as raw material for liquid adhesive because it contains lignocellulose components . However, when liquid adhesive was applicated in particle board manufacturing, the physical and mechanical properties of board was still below JIS A 5908:2003 standard. The purpose of this research is to get information about effect of adhesive level and fortification liquid adhesive with fenol formaldehyde in different levels to particle board quality including physical and mechanical properties of particle board. The research results show that physical and mechanical properties of particle board is still not fulfill the standard of JIS A 5908:2003, however, statistical analysis shows that the addition of fortifier gave significant influence to particle board quality.
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Judul: Pengaruh vaksinasi terhadap dinamika populasi pada model SIR (Susceptible-Infected-Recovered)
Abstrak: SIR model can be used to model the spread of diseases in a closed population based on certain assumptions. In this research, the SIR model is formulated by including the factor of vaccination. As the result, the model has been shown to have two equilibrium points, i.e. disease free and endemic equilibrium. A simulation study is carried out to illustrate the model. The results show that some equilibrium points are asymptotically stable. Moreover, a minimum level of vaccination has been defined. For the vaccination level less than the minimum level, increase in the vaccination level results in decrease of the proportion of infected individuals in the corresponding equilibrium point. On the other hand, for the vaccination level greater than the minimum level, increase in the vaccination level results in decrease the proportion of susceptible individuals in the corresponding equilibrium point. Furthermore, when vaccination level is greater than the minimum level, it is found that the time needed for the disease to extinct is shorter.
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