Judul: Keragaman Jenis Rayap dan Intensitas Kerusakan Bangunan di Perumahan Taman Darmaga Permai I, Ciampea, Bogor
Abstrak: Termites attack make building service life of being shorter. Building components which are attacked by termites are made of lignocellulose. The objective of this research is to understand the species of termites, distribution of termites and intensity of the damage building. Identification of termites species used baiting method (ASTM D 1758-06 2008) with burying ±250 pine woods. The Intensity of building damage was done by components building survey in Taman Darmaga Permai I Residence, Ciampea, Bogor. There were five species of termites in research location such as Macrotermes gilvus, Odontotermes javanicus, Coptotermes curvignathus, Schedorhinotermes javanicus, dan S. sarawakensis. The widest spreading of termites species was O. javanicus from Termitidae family. Most of home building conditions were in medium conditions (87.91 %). Mechanical factors had the highest percentage (40.75 %) as a cause of the damage building than biological (37.36 %) and physical factors (21.13 %).
Keyword: termites, distribution of types, diversity, Building damage intensity

Judul: Keragaman Jenis Rayap dan Intensitas Kerusakan Bangunan di Perumahan Alam Sinarsari, Cibeureum, Darmaga, Bogor
Abstrak: Nowdays, termite attacks to buildings are very important issue with considering the intensity of their attacks which are high and extend, so that the value of losses due to termite attacks tend to increase from year to year. The demography of Kota Bogor which has high rain intensity and humidity can be one of factor causing building damages. Damage of buildings like decay and crack can be a access for termites to attack the buildings. The objective of this research is to know the species and distribution of subterranan species, along with to know damage intensity of house buildings in the location of research. Location of this research is Perumahan Alam Sinarsari with spread 280 stakes Pinus merkusii size 1.9 cm x 1.9 cm x 45.7 cm. The results showed that there found six species of subterranean termites at Perumahan Alam Sinarsari, which were Coptotermes curvignathus, Schedorhinotermes sarawakensis, S. javanicus, Odontotermes javanicus, Macrotermes gilvus, and Capritermes mohri. Meanwhile based on survey of damage and interview showed most of the houses buildings included in medium condition (61.03%) and also founded damaged caused by dry wood termite attacks.
Keyword: dry wood termite, damage of building, termite, Biodiversity

Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model