Judul: Kekuatan sambungan baut double shear berpelat sisi baja pada kayu Sengon, Bintangur dan Kapur menurut berbagai sesaran
Abstrak: INTRODUCTION : Wood as raw material needs continue to increase for various purposes. Similarly, for component building materials or construction materials. As a construction materials, wood has been known to the public long before the public to use concrete or steel. In use as building construction materials, wood should be able to withstand various kinds of expenses in the period planned and have sufficient durability and has a cross-sectional size or length of span in accordance with the planning. Cross-sectional size or long span timber in accordance with the plans for building construction is very difficult to obtain. This is because of the limited size of available timber in the market so it needs a connection. MATERIAL AND METHOD : The main material used is wood sorts Sengon (Paraserianthes falcataria (L). Nielsen), Bintangur (Calophyllum inophyllum L.) and Kapur (Dryobalanops sp.), bolts and steel plates. Wood used as a mechanical connection that unites steel plate with wood screws that penetrate the system using the plate-wood-plate which is the tightened with a nut for strong connection strength is based on ASTM D5652-95 with a direction perpendicular to the bolt load. Other properties tested were water content, density and maximum compressive strength parallel to grain. Tests physical properties following the ASTM D143-94, while the mechanical properties following the BS-373 1957. RESULT : Double-shear strength bolt connection between the wood with steel plates in general are influenced by density of wood. The higher value density then the value of the power connection (which is expressed with the total load) and the value of load per bolt will be higher as well. Total expenses will increase with the number of bolts except from 6 to 8 pieces,while the load per bolt is not affected by the number of bolts. Total load and load per bolt tends to increase with increasing bolt diameter from 6.4 mm to 7.9 mm,but decreases when the diameter increased to 9.4 mm bolts.
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Judul: Design of Wood Connection Strength Using Double Shear Steel Side Plates with Bolt in Five Indonesian Wood Species
Abstrak: This study aims to analyze the effect of diameter and the number of bolts for double shear wood connection to lateral design value. Five Indonesian wood species namely sengon (Paraserianthes falcataria), nangka (Artocarpus sp), punak (Tetramerista glabra), kapur (Dryobalanops sp), and bangkirai (Shorea laevifolia) were analyzed their mechanical and physical properties before treatments. The sample (6 cm x12 cm x30 cm) was connected using double shear connection which use several diameter of bolts (6.4 mm, 7.9 mm and 9.4 mm) and number of bolts (4, 6, 8 and 10 bolts). The result showed that there is significant different of lateral design value in double shear connection by specific gravity of woods where the wood with high specific gravity have a high lateral design value. There is significant different of lateral design value in double shear wood connection by number of bolts where lateral design value of wood connection tended decreases. Emperical test to double shear wood connections showed that the Indonesian wood species have lateral design value for displacement 1.5 mm (Indonesian standard) and 5.0 mm higher than reference lateral design value of Indonesian wood species for sengon, but it’s lower for other species. Reference lateral design value of Indonesian wood is higher than references lateral design value of NDS 2005 for bolt 6.4 mm, but it’s lower for bolts 7.9 and 9.4 mm.
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Judul: Infeksi Virus Parainfluenza Pada Anjing
Abstrak: Virus parainfluenza anjing termasuk famili Paramyxoviridae, berbentuk pleomorf dengan ukuran bervariasi (bergaris tengah antara 100-500 nm), berpembungkus peka ether, berisi genom RNA dan secara serologis mempunyai kesamaan dengan virus SV-5 kera; dikenak sebagai salah satu kausa penting dari sindrom "kennel cough". Infeksinya dapat mengenai anjing semua umur yang belum pernah terinfeksi atau mendapatkan vaksinasi mengakibatkan gejala klinis ringan yang terbatas pada traktus respirasi atu infeksi yang secara klinis tidak memperlihatkan gejala nyata. Gejala klinis yang nampak setelah masa inkubasi (1-5 hari) terlewati berupa batuk yang tidak berat selama beberapa hari, berbagai tingkat tonsilitis dan pharyngitis dan kadang-kadang ditemukan kenaikan temperatur rektal antara 1-2 derajat C dari temperatur normal rat-rata. Anjing terinfeksi mengandung virus pada traktus respirasi bagian atas dan bawah serta limfonoduli sampai hari ke 9 setelah infeksi. Penyebaran virus antar anjing terjadi secara aerogen.
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