Judul: Studi Potensi dan Penyebaran Ulin (Euxideroxylon zwagerii Teijsm. & Binnend.) pada Kawasan Lindung Areal IUPHHK-HT PT. Wana Hijau Pesaguan, Propinsi Kalimantan Barat.
Abstrak: The rapid rate of deforestation and illegal logging in Indonesia led to the decreasing number of Ulin in Indonesia. The aim of this study is to examine the potential and deployment of Ulin trees (Euxideroxylon zwageri), as well as to determine the type of vegetation in habitats Ulin tree ( ) are useful in conservation efforts a protected plant in the area of PT. Green Pesaguan Wana, West Kalimantan. Technique sampling vegetation analysis in this study using a single plot measuring 100 m x 100 m with a number of sub-plots as much as 25 sub-plot with an area of 20 m x 20 m. Results from the analysis of data obtained species diversity index (H ') is highest ironwood on the right side of the river border region with a value H' is 4,820. Evenness index (E) in four locations including high because ranged from 0866 to 0919 and the highest evenness values obtained at the location of riparian right. Potential ironwood (Eusideroxylon zwageri) based on the largest volume in the area of germplasm protected areas is 16:40 m3 / ha. Total biomass ironwood obtained on the river banks right side of 0.77 tonnes / ha of total 310.72 tons / ha, the location of river banks left obtained biomass ironwood $ 3.10 tonnes / ha of 123.96 tonnes / ha, the location with a slope of more than 25% have a biomass Ironwood at 4:09 tonnes / ha of total 440.24 tons / ha, protected areas germplasm has the largest total biomass ironwood is 9:42 tonnes / ha of 213.55 tons / ha. Ironwood distribution pattern (Eusideroxylon zwageri) generally at the four study sites is to be equal to 1 (one), it is stated that the growth pattern of the spread of ironwood is random (random).
Keyword: evenness, density, distribution pattern, Ulin

Judul: Keawetan alami kayu ulin (Eusideroxylon zwageri T. et B.) pada umur yang berbeda dari hutan tanaman di Kalimantan Selatan
Abstrak: INTRODUCTION. Ironwood (Eusideroxylon zwageri T. et B.) has long been known having high quality, resistant to termites and other natural condition, but the ability of regeneration and growth is too slow. Nowadays, the presence of this species is in danger because increasing of human needs. The Government of South Kalimantan and plantation forest company are already starting to cultivate and promote planting ironwood on forest in order to anticipate the extinction and to keep the availability of ironwood in market. Consequently, it is important to do research about natural durability of ironwood at young age for logging consideration. MATERIAL AND METHOD. This research was done by using ironwood from Plantation Forest in South Kalimantan, different age and diameter, 39 years old (30 cm diameter) and 26 years old (16 cm), and subterranean termites Coptotermes curvignathus Holmgren. Test method was refered to the procedure of Indonesian National Standard (SNI) 01.7207-2006 for Laboratory test and American Society for Testing and Material (ASTM) Standard for graveyard test. The research parameters is weight loss, mortality of the termites, and degree of damage in the sample.
Keyword: 

Judul: Pembuatan Sistem Kontrol Gas Amonia Berbasis Mikrokontroler Arduino.
Abstrak: Gas amonia adalah salah satu gas yang beracun yang dapat meneyebabkan kematian pada manusia atau hewan. Dalam penelitian ini dibangun sebuah sistem pengontrol yang dapat mengatasi bahaya keracunan akibat adanya gas amonia. Sistem pengontrol dibuat menggunakan dan menggunakan relay sebagai saklar otomatis untuk kipas, kipas yang digunakan sebagai pembuang gas amonia, sensor MQ-135 sebagai sensor pendeteksi keberadaan konsentrasi gas amonia dalam satuan part per million (ppm). Sistem pengontrol beroperasi menggunakan arduino uno untuk mengirim perintah on/off otomatis pada relay sebagai saklar otomatis dari kipas, ketika sensor membaca konsentrasi gas diatas 5 ppm maka peintah yang dikirim adalah on kemudian kipas akan menyala dan apabila dibawah 5 ppm perintah yang dikirim adalah off kemudian kipas mati.
Keyword: gas amonia, sensor mq-135, relay, arduino uno, sistem pengontrol