Gadjah Mada University

About: Gadjah Mada University is a education organization based out in Yogyakarta, Indonesia. It is known for research contribution in the topics: Population & Adsorption. The organization has 17307 authors who have published 21389 publications receiving 116561 citations. The organization is also known as: University of Gajah Mada & Universitas Gadjah Mada.

Continuous N-gram Representations for Authorship Attribution

Abstract: This paper presents work on using continuous representations for authorship attribution. In contrast to previous work, which uses discrete feature representations, our model learns continuous representations for n-gram features via a neural network jointly with the classification layer. Experimental results demonstrate that the proposed model outperforms the state-of-the-art on two datasets, while producing comparable results on the remaining two.

Infrared spectroscopy for quantitative analysis and oil parameters of olive oil and virgin coconut oil: A review

Abstract: Vegetable oils are major lipid sources with high nutritional and calorific values for human diet. Specifically, virgin coconut oil and extra virgin olive oil are the functional oils widely used in food and pharmaceutical products, either as vehicles or main components. The quality of edible oils is determined by its contents and parameters inherent in vegetable oils. Infrared spectroscopy is an ideal technique for quantitative analysis of vegetable oils as well as for determination of oils parameters as the changes in infrared spectra can be associated with the changes of oils parameters. Infrared spectra in complex samples are difficult to interpret, as a consequence, spectroscopist uses additional tools called with chemometrics to analyse edible oils qualitatively and quantitatively. This article reviews the use of infrared spectroscopy combined with chemometrics (multivariate analysis) for quantitative analysis and determination of oil parameters of virgin coconut oil and extra virgin olive oil...

AQP and the Control of Fluid Transport in a Salivary Gland

Abstract: Experiments were performed with the perfused rat submandibular gland in vitro to investigate the nature of the coupling between transported salt and water by varying the osmolarity of the source bath and observing the changes in secretory volume flow. Glands were submitted to hypertonic step changes by changing the saline perfusate to one containing different levels of sucrose. The flow rate responded by falling to a lower value, establishing a new steady-state flow. The rate changes did not correspond to those expected from a system in which fluid production is due to simple osmotic equilibration, but were much larger. The changes were fitted to a model in which fluid production is largely paracellular, the rate of which is controlled by an osmosensor system in the basal membrane. The same experiments were done with glands from rats that had been bred to have very low levels of AQP5 (the principal aquaporin of the salivary acinar cell) in which little AQP5 is expressed at the basal membrane. In these rats, salivary secretion rates after hypertonic challenges were small and best modelled by simple osmotic equilibration. In rats which had intermediate AQP5 levels the changes in flow rate were similar to those of normal rats although their AQP5 levels were reduced.

Calprotectin Expression in Human Monocytes: Induction by Porphyromonas gingivalis Lipopolysaccharide, Tumor Necrosis Factor-α, and Interleukin-1β

Abstract: Background: Calprotectin is a major cytosolic protein of monocytes and granulocytes. It is increased in inflammatory tissues and is detected at high levels in the gingival crevicular fluid (GCF) of periodontitis patients. We previously reported that lipopolysaccharide of Porphyromonas gingivalis (P-LPS) and cytokines induced the release of calprotectin from monocytes isolated from human peripheral blood. The mechanisms of calprotectin expression and presence of its regulation factors in periodontal disease are unknown. On the other hand, P-LPS and cytokines are significant etiologic factors in the initiation and progression of periodontal diseases. In this study, we investigated the expression and production of calprotectin from human monocytes by examining the effects of lipopolysaccharide of P-LPS, tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β). Methods: Monocytes were isolated from the peripheral blood of healthy donors and cultured in the presence or absence of P-LPS, TNF-α, or IL-1β. The expressions of calprotectin mRNAs (MRP8 and MRP14) were detected by Northern blotting. The contents of calprotectin in the cells and medium fractions were determined by enzyme-linked immunosorbent assay (ELISA). The DNA binding activity of C/EBPα, a transcription factor of MRP14, was assessed by electrophoretic mobility shift DNA-binding assay (EMSA). Results: P-LPS, TNF-α, and IL-1β induced MRP8/14 mRNAs and calprotectin production in monocytes. These factors also induced DNA CEBPα binding activity in monocytes. P-LPS increased MRP14 mRNA expression in monocytes to the maximum level, about two times the control level after 24 hours treatment, but did not enhance the basal level of MRP8. When the effects of TNF-α and IL-1β on those mRNAs were investigated, both MRP8 and MRP14 significantly increased to about 2- and 2.5-fold the control level, respectively. Increases of MRP8/14 mRNA expression were followed by their protein production at about 2-fold the basal amount. DNA binding activity of C/EBPα was increased in P-LPS, TNF-α, and IL-1β-treated monocytes. Conclusions: These results demonstrate that P-LPS, TNF-α, and IL-1β induce calprotectin production from human monocytes and that this production is associated with the activation of DNA C/EBPα binding complex. J Periodontol 2005;76:437-442.

First integrative trend analysis for a great ape species in Borneo

Abstract: For many threatened species the rate and drivers of population decline are difficult to assess accurately: species' surveys are typically restricted to small geographic areas, are conducted over short time periods, and employ a wide range of survey protocols. We addressed methodological challenges for assessing change in the abundance of an endangered species. We applied novel methods for integrating field and interview survey data for the critically endangered Bornean orangutan (Pongo pygmaeus), allowing a deeper understanding of the species' persistence through time. Our analysis revealed that Bornean orangutan populations have declined at a rate of 25% over the last 10 years. Survival rates of the species are lowest in areas with intermediate rainfall, where complex interrelations between soil fertility, agricultural productivity, and human settlement patterns influence persistence. These areas also have highest threats from human-wildlife conflict. Survival rates are further positively associated with forest extent, but are lower in areas where surrounding forest has been recently converted to industrial agriculture. Our study highlights the urgency of determining specific management interventions needed in different locations to counter the trend of decline and its associated drivers.