Judul: Analisis Deformasi Aksial pada Batas Proporsional dan Maksimum Panel Cross Laminated Timber Kayu Sengon (Paraserianthes falcataria L. Nielsen) dan Kayu Mindi (Melia azedarach Linn)
Abstrak: Penggunaan kayu-kayu yang berkualitas kekuatan rendah dari hutan rakyat dapat dimodifikasikan dalam pembuatan produk untuk bahan struktural yang berkualitas tinggi. Salah satunya adalah teknologi pembuatan papan laminasi silang. Sambungan merupakan titik terlemah pada bangunan struktural. Penelitian ini mencoba mengamati dan menganalisis deformasi aksial pada batas proporsional dan maksimum dari sambungan perekat isosianat kayu sengon dan kayu mindi. Rataan umum pada beban batas proporsional dan maksimum masing-masing adalah 1613 kg dan 1910 kg. Deformasi aksial batas proporsional berkisar dari 1.37 mm (Sengon)-1.52 mm (Mindi). Deformasi aksial pada batas maksimum terjadi pada kisaran 1.77 mm (Sengon)-2.08 mm (Mindi)
Keyword: batas maksimum, batas proporsional, sambungan perekat isosianat, deformasi aksial

Judul: Deflection analysis at the proportional and maximum limit on cross laminated timber from sengon (paraserianthes falcataria l. Nielsen) and manii (maesopsis eminii engl.)
Abstrak: Cross Laminated Timber (CLT) merupakan papan laminasi yang pada saat ini sudah dapat digunakan sebagai komponen bangunan rumah, dek jembatan, hingga struktur utama gedung bertingkat. Tujuan penelitian ini untuk menentukan besar pengaruh kombinasi tebal dan orientasi sudut lamina terhadap defleksi pada batas proporsional dan maksimum panel CLT menggunakan sambungan paku dan perekat. Data mekanis yang diolah yaitu besar beban dan defleksi pada batas proporsional dan maksimum dari kurva gaya-defleksi panel CLT yang dibebani lentur statis. Hasil penelitian menunjukkan perlakuan kombinasi tebal dan orientasi sudut tidak mempengaruhi defleksi untuk setiap jenis panel CLT. Defleksi memiliki nilai kisaran yang kecil sehingga sulit untuk menentukan faktor yang mempengaruhi besar defleksi tersebut. Selain itu berdasarkan seluruh hasil yang didapat bahwa pada penggunaan sambungan panel CLT, perekat merupakan sambungan yang paling stabil dibandingkan sambungan paku., Cross Laminated Timber (CLT) is a wood composed product of some lamina that used these days for house component, bridge deck, and main structure for multistoried buildings. The purpose of this research determined the influence of lamina thickness combination and angle orientation toward deflection at the proportional and maximum limit on CLT panel using nails and adhesive connections. Mechanic data which processed is loading value and deflection on proportional and maximum limit from deflection force curve from CLT panel from static loading. The result of this research showed the treatment combination of thickness and laminated angle orientation did not affect deflection for each type of CLT panels. Deflection has a small range of values therefore difficult to determine factors that affected deflection. In addition, based on all the results obtained that the use of CLT panel connections, the adhesive is the most stable than a nail connection.
Keyword: batas maksimum, batas proporsional, beban, CLT, defleksi

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: