Judul: The Sumatran Genus Morinda L. (Rubiaceae)
Abstrak: The major revision of the genus Morinda for the Sumatran region was undertaken by Miquel in 1856 and 1862 but there has no comprehensive revision of the genus recently. Therefore the revision of the genus in Sumatra was done based on their morphological characters, especially to know the species of Morinda and their distribution pattern. A phylogenetic analysis was also studied to establish the relationship among the species using parsimony analysis. The present study revealed that there were eight species, six species among them were previously known as M. citrifolia L., M. jackiana Korth., M. leparensis Valeton, M. rigida Miq., M. tomentosa Roth, M. umbellata L., and two newly proposed species namely M. lanuginosa Suratman and M. wongiana Suratman. M. bracteata Roxb. var. latifolia Valeton was also proposed as the new synonym of M. citrifolia L. var. bracteata (Roxb.) Hook.f. An identification key and detailed description of the taxa were provided. The natural history data including habitat, distribution, uses and vernacular names were also presented. The most widespread species is M. citrifolia while the other species have a limited distribution. The highest number of the species is found in North Sumatra and Bangka Belitung which consist of 4 species respectively. The phylogenetic analysis based on morphological data showed that despite their poorly resolved phylogenetic tree, Morinda is undoubtedly a monophyletic genus.
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Judul: Revision of Calamus and Daemonorops (Arecaceae) in Sulawesi
Abstrak: The rattans of Sulawesi presented by three different genera Calamus, Daemonorops and Korthalsia. Calamus and Daemonorops belong to subtribe Calaminae whereas Korthalsia belongs to subtribe Korthalsiinae. In Sulawesi Calamus is the biggest rattan genus with the number of species more than 23. This genus is very common tropical genus with the centre of diversity is in South East Asia. In Sulawesi Daemonorops consist of 7 species, whereas Korthalsia has one species only that is K. celebica, endemic species to Sulawesi. Recently the biodiversity of Sulawesi has been under severe threats caused by increasing large scale deforestation projects. Many commercial rattans has been illegally harvested and used as raw material for rattans industry. This alarming fact has ecological impact to the rattans of Sulawesi in the form of imminent massive of biodiversity lost. This situation is very true especially for the rattans because almost all species are climbers and they need trees to support their existence. With the intention to minimize the thread to the existence of the rattans of Sulawesi, basic study on the rattans taxonomy is needed as well as accurate documentation. Definite species delimitation is essential to be studied as the diversity continuously under threats and decreased.
Keyword: Sulawesi, Calamus, Daemonorops, Korthalsia, Korthalsia celebica

Judul: Penerbangan Otomatis Pesawat Tanpa Awak Jenis Sayap Tetap dengan iNav
Abstrak: Pesawat tanpa awak (UAV) dapat dikendalikan secara manual dengan remote control atau secara otomatis dengan flight controller (FC). Salah satu jenis UAV adalah sayap tetap yang memiliki bentuk seperti pesawat terbang pada umumnya. Penelitian ini bertujuan untuk melakukan penerbangan otomatis pada UAV jenis sayap tetap dengan mengkonfigurasi perangkat FC. UAV yang digunakan adalah model SkySurfer X8 dengan bentang sayap 1.4 m. FC yang digunakan adalah Matek F405-Wing yang dikonfigurasi dengan perangkat lunak iNav. Berdasarkan hasil uji terbang, UAV berhasil terbang secara otomatis mengikuti skenario yang diberikan. Skenario terjauh berupa persegi berukuran 600×600 m pada ketinggian 100 m, yang ditempuh dalam waktu sekitar 2 menit dengan kecepatan sekitar 65 km/jam. Diharapkan prosedur perakitan, konfigurasi, operasi, dan hasil data uji terbang dapat menjadi acuan dalam penelitian selanjutnya.
Keyword: iNav, penerbangan otomatis, pesawat tanpa awak, sayap tetap