Judul: Sifat Fisis dan Keawetan Kayu Mindi (Melia azedarach L.) dari Rayap Cryptotermes cynocephalus setelah Perlakuan Pemanasan Minyak Jatropha curcas
Abstrak: Kayu mindi (Melia azedarach L.) adalah salah satu jenis kayu cepat tumbuh yang potensial sebagai bahan baku di industri kayu. Kayu mindi memiliki keawetan yang rendah sehingga perlu didukung dengan proses pengawetan. Penelitian ini bertujuan untuk mengevaluasi pengaruh perlakuan pemanasan dalam minyak jarak pagar (Jatropha curcas) terhadap sifat fisis dan keawetan kayu mindi (Melia azedarach) dari rayap kayu kering (Cryptotermes cynocephalus). Kayu mindi diberi perlakuan rendaman dingin dan panas dalam minyak jarak pada suhu 120 °C, 150 °C dan 180 °C. Waktu rendaman panasnya adalah selama 1 dan 3 jam. Hasil penelitian ini menunjukkan bahwa perlakuan minyak jarak tersebut meningkatkan stabilitas dimensi kayu mindi. Kadar air, kerapatan dan stabilitas dimensi kayu mindi yang dipanaskan dengan minyak jarak selama 3 jam pada suhu 180 °C nyata lebih baik dibandingkan dengan perendaman dingin maupun pemanasan minyak jarak selama 1 jam. Keawetan kayu mindi terhadap serangan rayap kayu kering meningkat setelah pemanasan dengan minyak jarak dengan suhu 180 °C selama 1 jam atau selama 3 jam.
Keyword: kayu mindi, keawetan kayu, minyak jarak pagar, perlakuan pemanasan, sifat fisis

Judul: Ketahanan Kayu Mindi (Melia azedarach L.) Dari Rayap Kayu Kering Cryptotermes cynocephalus setelah Perlakuan Pemanasan
Abstrak: This research aimed to analysist the effect of heat treatment on the resistance of mindi (Melia azedarach L.) wood from dry wood termites (Cryptotermes cynocephalus). This research utilized mindi wood obtained from five years old tree from Malimping, Banten. The durability evaluation on mindi wood againts the dry wood termites is based on SNI 01.7207-2006. The result of this research showed that the heating treatments in oven and oil increased the durability of mindi woods. Based on the weight loss analyses, mindi wood that heated at 150 °C for 8 hours in oil increased their durability class from III to II. Statistical test results obtained showed that factors significantly influence weight loss and mortality due to dry wood termite attack is the interaction of temperature, time, and type of heating. Based on the analysis of the combination weight loss and mortality increase in the durability of the real Mindi wood and most effectively produced by heating oil 150 ˚ C for 8 hours while the wood oven heating temperature of 150 ˚ C requires 5 hours resulted in 99.8% mortality and weight loss amounted to 5.15%.
Keyword: timber heating process, mindi wood, durability, dry wood termites

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.
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