Grain growth in the envelopes and disks of Class I protostars

We present new 3 mm ATCA data of two Class I Young Stellar Objects in the Ophiucus star forming region: Elias29 and WL12. For our analysis we compare them with archival 1.1 mm SMA data. In the (u,v) plane the two sources present a similar behavior: a nearly constant non-zero emission at long baselines, which suggests the presence of an unresolved component and an increase of the fluxes at short baselines, related to the presence of an extended envelope. Our data analysis leads to unusually low values of the spectral index $\alpha_{\rm 1.1-3mm}$, which may indicate that mm-sized dust grains have already formed both in the envelopes and in the disk-like structures at such early stages. To explore the possible scenarios for the interpretation of the sources we perform a radiative transfer modeling using a Monte Carlo code, in order to take into account possible deviations from the Rayleigh-Jeans and optically thin regimes. Comparison between the model outputs and the observations indicates that dust grains may form aggregates up to millimeter size already in the inner regions of the envelopes of Class I YSOs. Moreover, we conclude that the embedded disk-like structures in our two Class Is are probably very compact, in particular in the case of WL12, with outer radii down to tens of AU.Comment: 12 pages, 8 figures, Accepted for publication in A&

Pendugaan Densitas Karbon Pada Tegakan Pohon di Kawasan Hutan Kampung Sawesuma, Distrik Unurum Guay, Kabupaten Jayapura

The community managed conservation area forest (AKKM) of Kampung Sawesuma is part of the lowland forest landscape of Northern Papua. Lowland forests have a very high diversity of plant species and act as carbon sinks stored in tree stands. To determine the amount of carbon stored in tree stands, an estimation of the carbon density of tree stands was carried out in the AKKM forest area of Kampung Sawesuma, Jayapura. Estimation of carbon density was carried out by non-destructive method of tree stands using sample plots (measurement transects) and calculating tree biomass using allometric equations. The measurement results show that the tree biomass in the AKKM forest area is 167.5 tons/ha with an estimated carbon density of 78.7 tons/ha in the stands. Key words: carbon density; lowland forest; Sawesuma Village

PERENCANAAN BIAYA BERDASARKAN JUMLAH DAN WAKTU PEMESANAN DENGAN METODE MRP (MATERIAL REQUIREMENT PLANNING) (STUDI KASUS:DILAKUKAN PADA PROYEK PEMBANGUNAN TERMINAL AKAP TANGKOKO BITUNG)

Perencanaan pengadaan material pada dasarnya merupakan masalah yang sangat penting dalam pelaksanaan kegiatan proyek. Apabila terjadi kelebihan atau kekurangan persediaan bahan dapat mengganggu kelancaran proyek. Pada prinsipnya, perencanaan pengadaan material yang tidak baik akan menimbulkan jalannya kegiatan proyek akan terhambat. Perencanaan pengadaan bahan (Material Requirement Planning) adalah suatu metode untuk menentukan kapan suatu material harus tersedia dan berapa banyak material yang dibutuhkan pada pelaksanaan proyek. Lot - Sizing merupakan langkah dasar dari Material Requirement Planning dalam menentukan jumlah suatu bahan yang harus dipesan untuk mendapatkan biaya-biaya persediaan yang optimum. Teknik lot-sizing yang dipilih adalah Part Period Balancing. Penelitian ini bertujuan mempelajari sejauh mana metode ini dapat merencanakan pengadaan material pada proyek pembangunan terminal AKAP Tangkoko Kota Bitung, untuk mengembangkan model penerapan teknik part period balancing kedalam proyek yang dikendalikan dengan Master Schedule. Keluaran kebutuhan bahan tiap periode dari pendistribusian material tersebut merupakan kebutuhan kotor. Untuk melakukan lot-zing diperlukan data-data ongkos persediaan. Berdasarkan status persediaan proyek dapat diperoleh kebutuhan bersih yang akan digunakan dalam proses lot-sizing, untuk menentukan besarnya pesanan serta persediaan-persediaan bahan yang timbul pada tiap periode. Kemudian berdasarkan waktu ancang yang dimiliki, dapat ditentukan waktu pemesanan.Hasil penelitian menunjukkan bahwa metode Material Requirement Planning dengan teknik Part Period Balancing dapat dikendalikan dengan Master schedule, dan dapat mereduksi persediaan diproyek serta mengoptimalkan biaya persediaan. Kata kunci: perencanaan biaya, pengadaan material, MRP, Lot-Sizing, Part Period Balancin

Investigation of the thermal stability of Mg/Co periodic multilayers for EUV applications

We present the results of the characterization of Mg/Co periodic multilayers and their thermal stability for the EUV range. The annealing study is performed up to a temperature of 400\degree C. Images obtained by scanning transmission electron microscopy and electron energy loss spectroscopy clearly show the good quality of the multilayer structure. The measurements of the EUV reflectivity around 25 nm (~49 eV) indicate that the reflectivity decreases when the annealing temperature increases above 300\degreeC. X-ray emission spectroscopy is performed to determine the chemical state of the Mg atoms within the Mg/Co multilayer. Nuclear magnetic resonance used to determine the chemical state of the Co atoms and scanning electron microscopy images of cross sections of the Mg/Co multilayers reveal changes in the morphology of the stack from an annealing temperature of 305\degreee;C. This explains the observed reflectivity loss.Comment: Published in Applied Physics A: Materials Science \& Processing Published at http://www.springerlink.com.chimie.gate.inist.fr/content/6v396j6m56771r61/ 21 page

Keanekaragaman Ngengat Superfamily Bombicoidea: Eksplorasi Potensi Ulat Sutera di Dataran Rendah Kabupaten Jayapura

Jayapura Regency is one of the regions that considerable potential for economic growth from non-timber forest products. In the development of non-timber forest products in the form of products produced by insects, silk yarn is one of the commodity that has a high demand. The domestic demand for silk yarn is 900 tons/year, while only 19.05 tons/year were produced in 2012. Jayapura Regency has a great potential to supply the shortage of cocoon for the domestic market and the wide open international market. Related to this challenge, this study conducted basic research on the diversity of moths from the Bombicoidea superfamily in the natural forest of Kampung Soaib, Jayapura Regency. Sampling using light traps, four species of moths from the Saturnidae family were obtained, Syntherata apicalis, Opodiphtera intermedia, Opodiphtera papuana, and Coscinocera hercules. The cocoon of Coscinocera hercules is very potential as a silk thread producer because it is large and consists of two layers with brown color and has fiber characteristics similar to the cocoon of Attacus atlas which has been developed as a wild silk producer. These results indicate that the lowland forests of Jayapura Regency as a habitat for wild silkworm species has potential to be developed as non-timber forest products.Key words: Superfamily Bombicoidea; silkworm; cocoon; Jayapura regenc

PELATIHAN PENGOLAHAN DAN PENGEMASAN PANGAN LOKAL UNTUK MENINGKATKAN NILAI EKONOMI PRODUK PERTANIAN DI KAMPUNG RHEPANG MUAIF

Saccharum edule (sayur lilin) is  one of Papua's local food sources that have potential as a source of nutrition . However,  its availability in the market is not continuous, depending on harvest..In order for the vegetables can be enjoyed by the community without waiting for harvest, efforts should be made to improve the post-harvest processing technology.  One of the efforts made is the method of preserving vegetable .. The method used is vaccum sealer with four blanching techniques. The results obtained are as follows polypropylene plastic which is used as the packaging. It is very suitable for packaging of sayur lilin because  it shows no signs of damage. Based on the observation of organoleptic properties, the best treatment is good from color, texture, water content, air and aroma, showing the packaging with VK treatment can last up to 12 days. Packaging of products is needed by the household scale industry, because it is one of the requirements in the management of P-IRT permit. Keywords: Sacharum edule, perserving vegetable, packing.

Molecular characterisation, expression and localisation of human neurokinin-3 receptor

AbstractThe complete amino acid sequence of the human neurokinin-3 receptor was deduced by DNA sequence analysis of human genomic fragments. Comparison of the predicted primary structure with those for the human neurokinin receptors 1 and 2 shows a highly conserved pattern of seven hydrophobic regions with maximum divergence occuring at the amino- and carboxy-termini. The position of intron-exon junctions are identical to those in other reported neurokinin genes. Using a chimeric genomic-cDNA gene, the human NK-3 receptor was expressed in Xenopus laevis oocytes where it mediates membrane conductance changes in response to its agonist, neurokinin B. More significantly, expression of the gene in mammalian cells resulted in detection of receptor binding as well as neurokinin-stimulated calcium mobilization and arachidonic acid release, all displaying the pharmacological characteristics expected of a neurokinin-3 receptor, By using the polymerase chain reaction we have shown that mRNA for the human neurokinin-3 receptor is expressed predominantly in the central nervous system

Spectral analysis of Gene co-expression network of Zebrafish

We analyze the gene expression data of Zebrafish under the combined framework of complex networks and random matrix theory. The nearest neighbor spacing distribution of the corresponding matrix spectra follows random matrix predictions of Gaussian orthogonal statistics. Based on the eigenvector analysis we can divide the spectra into two parts, first part for which the eigenvector localization properties match with the random matrix theory predictions, and the second part for which they show deviation from the theory and hence are useful to understand the system dependent properties. Spectra with the localized eigenvectors can be characterized into three groups based on the eigenvalues. We explore the position of localized nodes from these different categories. Using an overlap measure, we find that the top contributing nodes in the different groups carry distinguished structural features. Furthermore, the top contributing nodes of the different localized eigenvectors corresponding to the lower eigenvalue regime form different densely connected structure well separated from each other. Preliminary biological interpretation of the genes, associated with the top contributing nodes in the localized eigenvectors, suggests that the genes corresponding to same vector share common features.Comment: 6 pages, four figures (accepted in EPL