Judul: Aplikasi Paralon sebagai Alat Sambung Buluh Bambu Tali
Abstrak: The use of bamboo as an alternative material of building increasingly widespread, i.e. house construction utilisation, tent, stage or some tools. Bamboo has relatively better strength properties than wood should be one contributing factor. Bamboo also has a relatively light weight because its has a cavity, so it will be easier to process. Futhermore, connecting bamboo has some constraints and required special expertise. Connector from Poly Vinil Choloride (PVC) has been expected better advantage compare than rope in bamboo connection. None has been using paralon for connecting devices on bamboo, then it is necessary to do research in the bamboo culm. PVC connector testing of physical properties include moisture content, density, and shrinkage, while testing the mechanical properties include bending test and compression test. The results showed that the strength of PVC connector has a better value 48% than the rope connector which is 276,45 kg/cm . MOE and MOR values of paralon as connector also have the respectively 66,7% which are 3069,63 kg/cm2 and 385,50 kg/cm2.
Keyword: Connector, PVC, Bamboo

Judul: Kajian Optimasi Sambungan Pasak  Bambu Laminasi pada Struktur  Laminated Veneer Lumber (Lvl)
Abstrak: Kekuatan pada struktur bangunan merupakan hal yang tidak bisa diabaikan dalam perancangan suatu konstruksi. Simpul atau sambungan dalam struktur merupakan titik kritis yang mempengaruhi kekuatan. Sambungan pada umumnya menggunakan konektor paku atau baut, yang tentunya mempunyai kelebihan serta kekurangan. Fakta memperlihatkan bahwa bangunan kuno dengan konstruksi kayu yang menggunakan pasak sebagai konektor masih berdiri kokoh meski telah berusia puluhan tahun. Besi dan baja merupakan hasil tambang yang tidak terbarukan sehingga pasak berbahan hayati yang terbarukan dapat digunakan sebagai pilihan. Kayu keras dengan mutu tinggi keberadaannya semakin menurun sehingga dimungkinkan dicari alternatif bahan yang dapat menggantikan kayu sebagai bahan baku pasak. Beberapa jenis bambu mempunyai potensi sebagai pengganti kayu, meskipun tidak dipungkiri bambu mempunyai banyak kelemahan. Beberapa hasil penelitian menunjukkan adanya jenis bambu yang mempunyai potensi sebagai komponen bahan bangunan. Bambu Betung dan Sembilang dapat digunakan sebagai bahan baku konstruksi karena kekuatan cukup tinggi dan kuat tariknya dapat dipersaingkan dengan baja.
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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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