Judul: Sifat Dasar dan Sifat Pengeringan Tiga Jenis Kayu Kurang Dikenal Asal Hutan Alam Papua
Abstrak: One of serious problems which is commonly complained in wood industries is wood drying process because of long time and frequent deformation and checks. So, wood drying is an imperative process in wood industries. Indonesia has about 4 000 wood species, but only a few of these woods are well known in their properties and uses. Wood drying property is influenced by physical and anatomy properties of different woods. The objective of this research was to reveal the physical properties, anatomy and drying properties of three lesser known wood species from natural forests in Papua, namely briya hatam (Rhustaitensis guild) pala hutan (Gymnacranthera paniculata), and ketapang (Terminalia complanata) with respective families comprising Myristicaceae, Anacardiaceae and Combretaceae. These basic properties and drying property were beneficial direction on determining their uses. The physical properties of woods included moisture content, specific gravity and shrinkage. The anatomy of wood was observed based on their structures while wood drying test included drying rate, defects evaluation, and drying schedule. The results of research showed that specific gravity and the anatomy of wood structure influenced the wood drying property. All the three wood species were difficult to be dried. Briya hatam with the higher specific gravity (0.52) had more drying defects than pala hutan and ketapang whose specific gravity 0.47 and 0.38 respectively. According to the drying test and basic properties of woods, the proper drying schedule (temperature and humidity) for briya hitam, pala hutan and ketapang were 4580 0C and 9028%; 5080 0C and 8530%; 5080 0C and 90 – 28% respectively.
Keyword: lesser known species, wood anatomy, wood drying properties, physical properties, wood

Judul: Sifat Fisis dan Pengeringan Kayu Rambutan, Nangka, dan Kecapi serta Penggunaan Larutan Urea dalam Pengendalian Cacat Pengeringannya.
Abstrak: The use of woods from community forest should be supported by proper technology to produce good products quality and in accordance with their intended uses. One of the factors that influences and being a requirement in wood products is the suitable moisture content to the environmental condition that stabilize the products dimension in the use. Therefore the objectives of this study was to determine the physical properties, drying properties, as well as developing the defects control technique in the drying of rambutan (Nephelium spp), kecapi (Sandoricum koetjapi) and nangka (Artocarpus heterophyllus) woods. The procedures performed in this study consisted of the physical properties testing of woods (BS: 373-1957), the test for basic drying properties based on Terazawa (1965), and drying defects control using saturated urea solution.The results showed that wood with higher density (rambutan) dried more slowly and more prone to defects compared to nangka and kecapi woods, wich had medium and low densities. Rambutan wood had a poor drying properties that was prone to surface cracking. While nangka and kecapi woods had a rather good drying properties. The soaking treatment in saturated urea solution, significantly reduced checking defect in the three tested wood species.
Keyword: 

Judul: A Continuous Vaccination Strategy in the SVIR Epidemic Model
Abstrak: Vaccination is conducted to minimize the spread of a disease. The vaccination is usually done several times within a fixed time interval. In the SVIR model, it is assumed that individuals do not get immediate immunity following a vaccination program. So according to process of vaccination on SVIR model, there are two strategies, i.e. the continuous vaccination strategy (CVS) and the pulse vaccination strategy (PVS). In this study, only the CVS strategy in epidemic model SVIR is considered. Results of the study indicate that dynamics of the CVS system depends on the basic reproductive number. If the basic reproductive number is less than one, then the disease-free fixed point is asymptotically stable. It means that the disease will eventually disappear from the population. Conversely, if the basic reproductive number is greater than one, then the endemic fixed point is asymptotically stable, which means that the disease will remain exist in the population. Simulation result shows that the vaccination would minimize the spread of disease by reducing the basic reproductive number. If the time for the vaccinated recipients to obtain the immunity, as well as a possibility of vaccinated recipients to be infected are neglected, then the disease will be eradicated. This condition is called an over-evaluating effect of vaccination.
Keyword: