Judul: Kajian Potensi Transmisi Penyakit Demam Berdarah Dengue Berdasarkan Curah Hujan dan Suhu di Jawa Tengah
Abstrak: Dengue hemorrhagic fever (DHF) is a viral disease which has spread throughout Indonesia over the past 25 years. Ae. aegypti is the main vector of the disease. In Indonesia, especially in Central Java, there has been an upward trend in the incidence of dengue hemorrhagic fever. Therefore some efforts to suppress an outbreak of this disease had been done by the government with focus against the vector. This research aims to determine and mapping the transmission potential (TP) of DHF in Central Java under 4 principal seasons: rainy (December- February), transition 1 (March – May), dry (June-August) and transition 2 (September – November) at 3 rainfall conditions ( below normal, normal and above normal years) using vectorial capacity (VC) method. The results show that the maximum average VC for under normal years occur on December-February, whereas for normal and above normal years its occurs on March-May. In every rainfall condition, the minimum VC occur on June-August when rainfall is minimum. Based on resulted map from this research, in coastal area of northern and southern site of Central Java which is lowland area, TP were higher than in central area which is highland. TP on city with high population such as Tegal, Semarang, and Surakarta were higher. Nevertheless, between VC and incidence rate (IR) were significant with coefficient correlation 0.057, caused by there weren’t interventions between 35 districts in Central Java to supress the number of DHF disease in case of sanitation, vector controls (fogging, aerial spraying, making abate), immunity of society, etc.
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Judul: Analisis Sensitivitas Model Penyakit Demam Berdarah Dengue dengan Faktor Curah Hujan Studi Kasus: Kabupaten Bogor
Abstrak: Demam berdarah dengue adalah penyakit yang disebabkan oleh gigitan nyamuk Aedes Aegypti yang sudah terinfeksi virus dengue. Pada penelitian ini dianalisis model demam berdarah dengue dengan adanya faktor curah hujan dengan kasus di Kabupaten Bogor. Tujuan penelitian ini adalah untuk melihat pengaruh parameter terhadap penyebaran penyakit. Penentuan bilangan reproduksi dasar menggunakan matrix the next generation. Peningkatan laju kematian nyamuk, peningkatan pergerakan curah hujan, penurunan tingkat gigitan nyamuk, penurunan peluang terjadinya transmisi virus dengue dari nyamuk ke manusia, penurunan peluang terjadinya transmisi virus dengue dari manusia ke nyamuk, dan penurunan tingkat curah hujan menyebabkan bilangan reproduksi dasar menurun. Parameter-parameter tersebut dapat digunakan untuk mengendalikan laju penyebaran penyakit demam berdarah dengue., Dengue hemorrhagic fever is a disease caused by the bite of the Aedes Aegypti mosquito which has been infected with the dengue virus. In this research, the dengue hemorrhagic fever model was analyzed with rainfall factor with cases in Bogor Regency. The purpose of this research was to see the effect of parameters on the spread of the disease. Determination of the basic reproduction number was using the next generation matrix. The increase in the death rate of mosquito, the increase in the movement of rainfall, the decrease in the rate of mosquito bites, the decrease in the transmission probabilities of dengue virus from mosquito to human, the decrease in the transmission probabilities of dengue virus from human to mosquito, and the decrease in the rainfall rate, cause the decrease of the basic reproduction number. These parameters can be used to control the rate of spread of dengue hemorrhagic fever.
Keyword: analisis kestabilan, analisis sensitivitas, bilangan reproduksi dasar, curah hujan, demam berdarah dengue, basic reproduction number, dengue hemorrhagic fever, rainfall, sensitivity analysis, stability analysis

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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