Judul: Karakteristik Bambu Lapis sebagai Bahan Baku Meubel
Abstrak: Bamboo is one of the alternative raw materials for industry utilized to fulfil the demands on forestry sector. The purpose of this research is to analyze the characteristics of laminated bamboo and examine its suitability as a raw material in the manufacture of furniture. The raw materials used are andong bamboo and betung bamboo. The treatment of laminated bamboo here divided into four categories: laminated bamboo without node, node on face position and back, the position of the core node, as well as the position of the node on the face, core and back. The manufacture of laminated bamboo uses a 10 kg cm-2 for 3 hours as cold pressure. Laminated bamboo’s tested characteristics are density, water content, volume stability, MOE (Modulus of Elasticity) and MOR (Modulus of Rupture), and shearing strength referred to the ASTM D 143 standard. Results show that node’s presence on laminated bamboo can improve physical properties but reduce mechanical properties.
Keyword: Bogor Agricultural University (IPB), andong bamboo (Gigantochloa pseudoarundinasea), betung bamboo (Dendrocalamus asper (Schult.f.) Backer ex Heyne), cross laminated bamboo

Judul: Karakteristik Bambu Lapis Menggunakan Anyaman Kajang dari Bambu Andong (Gigantochloa pseudoarundinaceae)
Abstrak: Wood production from forests is decreasing. In other side, the needs on wood as raw material for wood processing industries indicate an inclination to increase. As a consequence, wood supply is getting lower and the price of raw material is increasing. Hence, an effort is needed to produce alternative materials as wood substitution to ensure the sustainability of wood-based industries. The objective of this research was to analyze the influence of adhesive types, composition of width and thickness of bamboo’s strip to the physical and mechanical properties of ply bamboo. Bamboo was used in kajang bamboo mate type with different thickness of 0.5 mm and 1 mm, and different width of 1 cm and 2 cm. The internal bonding and modulus of elasticity (MOE) were not in accordance with SNI 01-5008.2-2000 with the values of less than 7 kg/cm2 dan 80 000 kg/cm2, respectively. Modulus of Rupture (MOR) and physical properties including moisture content and density fulfilled the SNI 01-5008.2-2000 standard which were less than 320 kg/cm2 for MOR and 14% for moisture content. Plybamboos in all combinations of width and thickness using epoxy were better than plybamboo which used PVAc as adhesive. The damage testing of ply bamboo using epoxy was 20.10%-35.58%. Plybamboo using thickness of 8 mm, width of 2 cm, and glued together with epoxy had better physical and mechanical properties compared with other plybamboos.
Keyword: PVAc, plybamboo, epoxy, andong bamboo

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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