Judul: Optimalisasi Persediaan Bahan Baku Kemas dengan Metode Program Dinamis Algoritma Wagner Within dengan Kendala Kapasitas Gudang di PT Bintang Toedjoe Pulogadung
Abstrak: Persediaan merupakan suatu hal yang berperan sangat penting bagi suatu perusahaan terutama industri manufaktur. Pengendalian persediaan yang baik diperlukan untuk mengelola persediaan agar efektif dan efisien. Penelitian ini dilakukan di PT Bintang Toedjoe Pulogadung dikarenakan permasalahan yang dihadapi yaitu gudang yang penuh (overload) dan persediaan yang berlebihan. Tujuan dari penelitian ini adalah menganalisis kapasitas penyimpanan maksimal gudang dan pengendalian persediaan bahan baku kemas sehingga didapatkan jumlah pemesanan dan persediaan yang optimal dengan adanya kendala keterbatasan kapasitas gudang. Data primer diperoleh melalui observasi di gudang, wawancara dengan bagian terkait dan data sekunder diperoleh dari dokumen perusahaan. Data dianalisis menggunakan Material Requirement Planning dengan metode Program Dinamis Algoritma Wagner Within (AWW). Hasil dari penelitian menunjukan bahwa metode AWW dapat menghemat pengeluaran perusahaan dibandingkan dengan metode perusahaan saat ini. Pengimplementasian metode AWW dapat berpengaruh pada terpenuhinya bahan baku pada saat diperlukan dan tidak menyebabkan overloadnya gudang.
Keyword: algoritma wagner within, material requirement planning

Judul: Penyelesaian Masalah Dynamic Lot Sizing dengan Algoritme Wagelmans-Hoesel-Kolen
Abstrak: Suatu perusahaan baik perusahaan perdagangan atau perusahaan industri selalu mempertimbangkan masalah persediaan barang. Tanpa adanya persediaan, perusahaan akan menghadapi risiko tidak dapat memenuhi permintaan pelanggannya. Masalah persediaan pada dasarnya akan menimbulkan biaya antara lain biaya pemesanan, biaya penyimpanan, dan biaya pembelian. Karya ilmiah ini membahas pengoptimuman biaya yang dikeluarkan perusahaan dalam masalah persediaan barang dengan banyak periode menggunakan algoritme Wagelmans- Hoesel-Kolen untuk mengetahui pada periode berapa pemesanan akan dilakukan serta banyaknya barang yang akan dipesan.
Keyword: Kata kunci: inventori, ukuran lot dinamis, Wagelmans-Hoesel-Kolen, inventori, ukuran lot dinamis, Wagelmans-Hoesel-Kolen

Judul: Phylogeography and Species Limits in the Papuan White Snake (Micropechis ikaheka) (Reptilia: Serpentes: Elapidae)
Abstrak: Papua white snake, Micropechis ikaheka, has been distingushed into two subspecies M.i. ikaheka and M.i. fasciatus. However, due to lack of data on their morphology, distribution and ecology, both subspecies often ignored in scintific discussions and refers only byas , Micropechis ikaheka. This study was designed to document the differences between M.i. ikaheka and M.i fasciatus by using scales characteristics and reproductive organ or hemipenes. The study also examine, zoogeography, habitat, diet and cannibalism of both subspecies to better understanding the the ecology of one of the most venomous snakes in the world. This study consists of three topics with method and also different in the size samples, respectively. The first study is the histology and microtopography of the skin were studied using paraffin method and Scanning Electron Microscope (SEM). The second is the hemipenis were examined by following Myers and Cadle (2003), and Zaher and Prudente (2003). The third is the abdominal surgery was carried out to document diet type and the investigate phenomenon of cannibalism in the snake. Specimens for this study came from the collection from Museum Zoologicum Bogoriense (MZB) and Universitas Negeri Papua’s Laboratory (LZU). The research result also indicated that the markers of skin and hemipenis described the same structure and microornamentation in all M. ikaheka groups being compared. Based specimens examined morphological descriptions do not s support the further differentiation in Micropechis. In short, two markers that used in this study could not sufficiently indicate the differences in the level of species and subspecies of M. ikaheka. The study, however, were able to delineate zoogeography and skin color patterns, which fall into four groups: M. i. ikaheka; M. i. fasciatus. M. i. ssp. “intermediate”; and M. i. ssp “black”. This study also revealed that color variations did not overlap in their geographic distribution. It is therefore, it suggested that environmental factors may contribute to the skin color variations. It also assumed that habitat discontinuous and biogeography factors may also cause the loss of the connection between the original populations (vicarians) or follow colonization events (dispersal). The examined of 22 stomach contents of M. ikaheka shows this species is carnivorous, and prey on vertebrates such as amphibians, fish, reptiles, and Mammals. These snakes are opportunistic predators since they prey on all that can be captured, but mainly reptiles (61.5%), followed by mammals and fish (both 15.4%), and amphibians (7.7%). Although categorized as terrestrial animal, the diet study showed that M. ikaheka snakes often go into the water to hunt for fish (the sample from Yapen island), including eel (the sample from Aru island). Based on prey items indentified, there is evidence that M. ikaheka is cannibal. At this time, there still no record on reason for cannibalism, but it is assumed that cannibalism was due to competition between populations and means to control population.
Keyword: geographic variation, white snake, papua