Judul: Bornean genus hypobathrum (Rubiaceae) an investigation of its characters and taxonomix status
Abstrak: Penelitian karakter-karakter dan status taksonomi marga Hypobathrum di Kalimantan dilakukan dengan mengunakan 140 spesimen di Herbarium Bogoriense. Dari hasil penelitian tersebut disimpulkan bahwa marga Hypobathrum di Kalimantan ada 24 jenis yang terdiri atas: enam jenis yang telah dikenal yaitu: H. jrutescens, H. IOllgifolium, H. microcarpum, H. racemosum, H. salicillllm dan H. venulosllm; tiga jenis kombinasi baru yaitu: H. cOlliocmpum, H gracile dan H. rz!fidulllm; satu jenis kombinasi baru dan status baru yaitu: H. hirtum; satu nama jenis baru yaitu: H. lallcifolillm; dua belas jenis baru yaitu: H. ballglleyellse, H. caudifolium, H. collinllm, H. ellipticifolillm, H. glaberrimum, H. glabrum, H. lithophilllm, H. palllstre, H. rheophyticllm H. riparillm, H. sampitellse dan H. sublllatllm, serta satu jenis yang tidak lengkap.
Keyword: Hypobathrum bangueyense, Hypobathrum

Judul: A Taxonomic Reinvestigation of some Biophytum Species (Oxalidaceae)
Abstrak: Biophytum merupakan salah satu tumbuhan yang dimanfaatkan sebagai obat tradisional di beberapa wilayah di Indonesia. Kesulitan mengidentifikasi sekumpulan koleksi Biophytum dari Jawa Barat dan Sulawesi Tengah, menunjukkan perlunya dilakukan penelitian untuk menemukan bukti taksonomi baru dalam merevisi marga Biophytum. Ciri dan sifat ciri morfologi dan anatomi Biophytum yang diamati terutama difokuskan pada ciri yang belum pernah dipergunakan sebelumnya untuk membatasi jenis-jenis Biophytum. Variasi ciri dan sifat ciri morfologi serta anatomi daun yang diamati dianalisis kemiripan dan perbedaannya. Data yang diperoleh kemudian ditabulasi untuk digunakan dalam membuat kunci identifikasi jenis Biophytum. Hasil penelitian menunjukkan bahwa terdapat variasi ciri morfologi pada bentuk permukaan dan warna batang, pelipatan daun muda, ada tidaknya lapisan lilin pada permukaan daun, pola perlekatan tangkai daun tua, keberadan adanya alat perkembangbiakan vegetatif berupa geragih dan tunas adventif, warna gagang perbungaan, warna calon perbungaan pada fase inisiasi, warna dan bentuk kuncup kecil dan kuncup besar, warna mahkota, diameter bunga saat mekar, bentuk dan ukuran buah merekah, serta bentuk biji. Pada ciri anatomi ditemukan variasi keberadaan macam dan letak trikoma, letak dan ukuran stomata, serta bentuk dinding sel epidermis. Semua variasi ciri dan sifat ciri morfologi batang, daun, bunga, buah dan biji, serta juga ciri anatomi daun ternyata dapat digunakan sebagai bukti taksonomi baru untuk membedakan jenis-jenis pada marga Biophytum melalui kunci identifikasi. Berdasarkan variasi ciri dan sifat ciri yang berhasil diungkapkan tersebut, ternyata bahwa kumpulan jenis yang diteliti ternyata terdiri atas lima jenis Biophytum yaitu, B. sensitivum, Biophytum sp. 1 dan Biophytum sp. 2 yang dikoleksi dari Sulawesi Tengah, serta B. dendroides dan B. reinwardtii yang berasal dari Jawa Barat., Biophytum is one of the sources of traditional medicinal herbs in several regions of indonesia. The difficulty in identifying collections of Biophytum from West Java and Central Celebes Province indicates that there is a need to find further taxonomic evidence for classifying species of this genus. Morphological and anatomical characters and character states hardly used in previous studies were analyzed and evaluated to find out their suitability to be used as diagnostic characters in defining each species. Information and data accumulated on the similarity and differences of morphological and leaf anatomical characters are tabulated and used to prepare an identification key. The results showed that there are variations in morphological characters of stem color and surface texture, the folding of young leaves, the presence of wax coating on leaf surface, attachment characteristics of old petioles, the presence of vegetative propagations in the form of stolon and adventive suckers, color and shapes of various generative parts including the peduncle, initial inflorescence and flower buds, size and shape of flowers, the dehiscing fruits, and the seed shapes. Similarly, there are variations in leaf anatomical characters such as the presence, shape, and distributions of trichomes and stomata, as well as the in the shape of epidermal cell walls. In conclusion, those variations in morphology of stem, leaves, flowers, fruits, and seeds, as well as leaf anatomical characters can be used as new taxonomic evidence to distinguish species of Biophytum. Based on the results obtained, it can be concluded that the collections studied represent five
Keyword: Biophytum, taxonomic evidence, morphological and anatomical characters

Judul: Implementasi Algoritme Enkripsi Advanced Encryption Standard secara Paralel dengan GPU NVIDIA CUDA
Abstrak: Processor streaming architecture in GPU has provide general purpose computation which have its own potential to help CPU with its parallel computation capability. One example of supported processor streaming architecture is Fermi which is developed by NVIDIA. Furthermore, NVIDIA has developed its own software development kit namely CUDA, which can integrate many popular existing programming languanges such as C++ for GPU-based parallel computation. This research focus on the implementation of parallel AES algorithm with GPU and analyze the performance result of the implementation in two different NVIDIA devices, namely NVIDIA GeForce GT220 and NVIDIA Quadro 600. In general, the performance of parallel GPU computation is better than sequential computation for large data input. It is obtained that the maximum speedup of NVIDIA GeForce GT220 in 8 MB input is 89.3 with 180% efficiency. Higher speedup of 101.6 can be obtained by NVIDIA Quadro 600 with the same input size with around 100% efficiency.
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