Judul: Pemodelan Penjualan Pada Perusahaan X Dengan Menggunakan Model Fungsi Transfer Input Ganda
Abstrak: Model fungsi transfer input ganda merupakan suatu model peramalan deret waktu berganda yang menggabungkan beberapa karakteristik model-model ARIMA dengan beberapa karakteristik analisis regresi. Model ini digunakan untuk mengetahui pengaruh deret output terhadap deret input sehingga model fungsi transfer ini dapat digunakan untuk menganalisis faktor-faktor yang memengaruhi penjualan Perusahaan X. Faktor members, redemption, dan submission digunakan sebagai deret input. Model fungsi transfer dilakukan melalui beberapa tahap yaitu tahap identifikasi model, pendugaan model fungsi transfer, dan pengujian diagnostik model. Berdasarkan model tersebut, penjualan dipengaruhi oleh members pada satu hari sebelumnya, dan submission pada hari yang sama. Nilai Mean Absolute Prencentage Error (MAPE) hasil peramalan sebesar 0.59% menunjukkan model fungsi transfer yang diperoleh baik dalam melakukan peramalan.
Keyword: ARIMA, CRM, model fungsi transfer, peramalan

Judul: Pemodelan Jakarta Islamic Index dengan Model Fungsi Transfer Input Ganda
Abstrak: Model fungsi transfer input ganda merupakan suatu model peramalan deret waktu berganda yang menggabungkan beberapa karakteristik model-model ARIMA dengan beberapa karakteristik analisis regresi. Model ini digunakan untuk mengetahui pengaruh deret output terhadap deret input sehingga model fungsi transfer ini dapat digunakan untuk menganalisis faktor-faktor yang memengaruhi Jakarta Islamic Index (JII). Faktor nilai tukar USD terhadap rupiah dan Dow Jones Index (DJI) digunakan sebagai deret input. Model fungsi transfer dilakukan melalui beberapa tahap yaitu tahap identifikasi model, pendugaan model fungsi transfer, dan pengujian diagnostik model. Berdasarkan model tersebut, JII dipengaruhi oleh JII satu dan dua hari sebelumnya, nilai tukar USD terhadap rupiah pada periode yang sama dan satu sampai dua hari sebelumnya serta DJI pada periode yang sama dan satu sampai lima hari sebelumnya. Nilai Mean Absolute Prencentage Error (MAPE) hasil peramalan sebesar 0.70% serta nilai korelasi antara data aktual dan data ramalan sebesar 0.77 menunjukkan model fungsi transfer yang diperoleh baik dalam melakukan peramalan.
Keyword: ARIMA, model fungsi transfer, Jakarta Islamic Index, prewhitening

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