2,490 research outputs found

    Management reference for nature reserve networks based on MaxEnt modeling and gap analysis: a case study of the brown鈥揺ared pheasant in China

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    Referencia para la gesti贸n de las redes de reservas naturales basada en la creaci贸n de modelos MaxEnt y el an谩lisis de deficiencias: un estudio del fais谩n orejudo pardo en China La planificaci贸n de reservas naturales y la creaci贸n de redes son importantes para la conservaci贸n de los h谩bitats y la fauna silvestre. Los an谩lisis de las deficiencias son instrumentos eficientes y fiables para establecer un orden de prioridad entre las iniciativas de conservaci贸n de h谩bitats, en especial por lo que respecta a las especies en peligro de extinci贸n. Proponemos un plan de conservaci贸n para el fais谩n orejudo pardo, Crossoptilon mantchuricum, mediante la determinaci贸n de las zonas con una protecci贸n insuficiente en las 14聽 reservas naturales existentes. En total, se seleccionaron 45聽 localidades y 11聽 variables ambientales en funci贸n de las caracter铆sticas del uso del h谩bitat del fais谩n orejudo pardo, y se utiliz贸 un modelo de m谩xima entrop铆a (MaxEnt) para obtener la distribuci贸n de la especie. Los resultados del modelo MaxEnt mostraron una elevada precisi贸n de predicci贸n. Los resultados del an谩lisis de las deficiencias revelaron que en las monta帽as Luliang, en Shanxi, y las monta帽asXiaowutai, en Hebei, la protecci贸n era insuficiente. Encontramos 458聽 km2 de h谩bitat 贸ptimo y 1.390聽 km2 de h谩bitat moderadamente adecuado dentro de los l铆mites de la reserva natural nacional. No obstante, casi 1.861聽 km2 del h谩bitat 贸ptimo y 17.035聽 km2 del h谩bitat moderadamente adecuado no estaban protegidos, lo que equivale al 9,0% y el 82,1%, respectivamente, del h谩bitat adecuado total. La mayor parte de la superficie sin protecci贸n estaba formada por h谩bitat moderadamente adecuado para el fais谩n orejudo pardo y deber铆a considerarse prioritaria en las iniciativas futuras de conservaci贸n. Hay nueve reservas naturales a lo largo de un eje norte鈥搒ur en las monta帽as Luliang que forma un pasillo ecol贸gico. Para mantener la integridad, originalidad y continuidad de estos h谩bitats y, por tanto, proteger el fais谩n orejudo pardo, deber铆an reforzarse los departamentos locales de conservaci贸n con miras a mejorar la gesti贸n de la reserva natural a escala provincial y poner en pr谩ctica eficazmente las iniciativas de conservaci贸n.Referencia para la gesti贸n de las redes de reservas naturales basada en la creaci贸n de modelos MaxEnt y el an谩lisis de deficiencias: un estudio del fais谩n orejudo pardo en China La planificaci贸n de reservas naturales y la creaci贸n de redes son importantes para la conservaci贸n de los h谩bitats y la fauna silvestre. Los an谩lisis de las deficiencias son instrumentos eficientes y fiables para establecer un orden de prioridad entre las iniciativas de conservaci贸n de h谩bitats, en especial por lo que respecta a las especies en peligro de extinci贸n. Proponemos un plan de conservaci贸n para el fais谩n orejudo pardo, Crossoptilon mantchuricum, mediante la determinaci贸n de las zonas con una protecci贸n insuficiente en las 14聽 reservas naturales existentes. En total, se seleccionaron 45聽 localidades y 11聽 variables ambientales en funci贸n de las caracter铆sticas del uso del h谩bitat del fais谩n orejudo pardo, y se utiliz贸 un modelo de m谩xima entrop铆a (MaxEnt) para obtener la distribuci贸n de la especie. Los resultados del modelo MaxEnt mostraron una elevada precisi贸n de predicci贸n. Los resultados del an谩lisis de las deficiencias revelaron que en las monta帽as Luliang, en Shanxi, y las monta帽asXiaowutai, en Hebei, la protecci贸n era insuficiente. Encontramos 458聽 km2 de h谩bitat 贸ptimo y 1.390聽 km2 de h谩bitat moderadamente adecuado dentro de los l铆mites de la reserva natural nacional. No obstante, casi 1.861聽 km2 del h谩bitat 贸ptimo y 17.035聽 km2 del h谩bitat moderadamente adecuado no estaban protegidos, lo que equivale al 9,0% y el 82,1%, respectivamente, del h谩bitat adecuado total. La mayor parte de la superficie sin protecci贸n estaba formada por h谩bitat moderadamente adecuado para el fais谩n orejudo pardo y deber铆a considerarse prioritaria en las iniciativas futuras de conservaci贸n. Hay nueve reservas naturales a lo largo de un eje norte鈥搒ur en las monta帽as Luliang que forma un pasillo ecol贸gico. Para mantener la integridad, originalidad y continuidad de estos h谩bitats y, por tanto, proteger el fais谩n orejudo pardo, deber铆an reforzarse los departamentos locales de conservaci贸n con miras a mejorar la gesti贸n de la reserva natural a escala provincial y poner en pr谩ctica eficazmente las iniciativas de conservaci贸n.Nature reserve designs and networks are important for wildlife and habitat conservation. Gap analyses are efficient and reliable tools for prioritizing habitat conservation efforts, especially when considering endangered species. We propose a conservation plan for the brown鈥揺ared pheasant, Crossoptilon mantchuricum, by identifying protection gap areas based on 14 existing nature reserves. A total of 45 locality sites and 11 environmental variables were selected according to the characteristics of habitat use of the brown鈥揺ared pheasant and applied to a maximum entropy (MaxEnt) model to obtain the species distribution. The MaxEnt model results showed a high prediction accuracy. The gap analysis results revealed that the Luliang Mountains in Shanxi and the Xiaowutai Mountains in Hebei had protection gaps. We found 458 km2 of optimum habitat and 1,390 km2 of moderately suitable habitat within the national nature reserve range. However, almost 1,861 km2 of the optimum habitat and 17,035 km2 of the moderately suitable habitat were unprotected, equivalent to 9.0% and 82.1%, respectively, of the total suitable habitat. Most of the unprotected area comprised moderately suitable habitat for brown鈥揺ared pheasant and should be prioritized in future conservation efforts. There are nine nature reserves along a north鈥搕o鈥搒outh range in the Luliang Mountains that form a wildlife habitat corridor. To maintain the integrity, originality, and continuity of these habitats and thus protect brown鈥揺ared pheasants, local conservation departments should be strengthened to improve provincial nature reserve management and successfully carry out conservation efforts

    Systematic literature review of prediction techniques to identify work skillset

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    A mismatch of skillsets is a main cause to the unemployment in Malaysia. It is a situation where the level and work skillset that are available do not match the market demands and the individual does not know how to identify the skills that they have. To deal with this problem, prediction techniques is used to assist in identifying work-appropriate skills for individual. Thus, a systematic literature review (SLR) on predicting work skillsets using prediction techniques is proposed. The aim of this study is to give an overview on the prediction techniques that have been used to predict work skillset and the accuracy of the techniques. We use SLR to identify 383 prediction techniques studies for identifying skills published from 2014 to 2019. As a result, 9 studies report adequate information and methodology according to our criteria and apply. From the studies, classification techniques are used for predicting work skillset. The algorithms used is Random Forest with precision is 99%. From this study, a future study will be conducted by developing a prediction model to help identifying appropriate work skillsets to meet current needs and identifying the levels of skills they have. The significant of this study is the researchers are able to understand deeply about the prediction techniques used to identify work skillset and the accuracy of the techniques used

    Longitudinal decrease in blood oxygenation level dependent response in cerebral amyloid angiopathy

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    AbstractLower blood oxygenation level dependent (BOLD) signal changes in response to a visual stimulus in functional magnetic resonance imaging (fMRI) have been observed in cross-sectional studies of cerebral amyloid angiopathy (CAA), and are presumed to reflect impaired vascular reactivity. We used fMRI to detect a longitudinal change in BOLD responses to a visual stimulus in CAA, and to determine any correlations between these changes and other established biomarkers of CAA progression. Data were acquired from 22 patients diagnosed with probable CAA (using the Boston Criteria) and 16 healthy controls at baseline and one year. BOLD data were generated from the 200 most active voxels of the primary visual cortex during the fMRI visual stimulus (passively viewing an alternating checkerboard pattern). In general, BOLD amplitudes were lower at one year compared to baseline in patients with CAA (p=0.01) but were unchanged in controls (p=0.18). The longitudinal difference in BOLD amplitudes was significantly lower in CAA compared to controls (p<0.001). White matter hyperintensity (WMH) volumes and number of cerebral microbleeds, both presumed to reflect CAA-mediated vascular injury, increased over time in CAA (p=0.007 and p=0.001, respectively). Longitudinal increases in WMH (rs=0.04, p=0.86) or cerebral microbleeds (rs=鈭0.18, p=0.45) were not associated with the longitudinal decrease in BOLD amplitudes

    AXL modulates extracellular matrix protein expression and is essential for invasion and metastasis in endometrial cancer

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    The receptor tyrosine kinase AXL promotes migration, invasion, and metastasis. Here, we evaluated the role of AXL in endometrial cancer. High immunohistochemical expression of AXL was found in 76% (63/83) of advanced-stage, and 77% (82/107) of high-grade specimens and correlated with worse survival in uterine serous cancer patients. In vitro, genetic silencing of AXL inhibited migration and invasion but had no effect on proliferation of ARK1 endometrial cancer cells. AXL-deficient cells showed significantly decreased expression of phospho-AKT as well as uPA, MMP-1, MMP-2, MMP-3, and MMP-9. In a xenograft model of human uterine serous carcinoma with AXL-deficient ARK1 cells, there was significantly less tumor burden than xenografts with control ARK1 cells. Together, these findings underscore the therapeutic potentials of AXL as a candidate target for treatment of metastatic endometrial cancer

    Continuous Processing and Efficient inSitu\textit{in Situ} Reaction Monitoring of a Hypervalent Iodine(III) Mediated Cyclopropanation Using Benchtop NMR Spectroscopy

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    Real-time NMR spectroscopy has proven to be a rapid and an effective monitoring tool to study the hypervalent iodine(III) mediated cyclopropanation. With the ever increasing number of new synthetic methods for carbon鈭抍arbon bond formation, the NMR insitu\textit{in situ} monitoring of reactions is becoming a highly desirable enabling method. In this study, we have demonstrated the versatility of benchtop NMR using inline and online real-time monitoring methods to access mutually complementary information for process understanding, and we developed new approaches for real-time monitoring addressing challenges associated with better integration into continuous processes.University of Cambridge (Daphne Jackson Fellowship), iCON through CMAC (Grant ID: RG74817), Engineering and Physical Sciences Research Council (Critical Mass grant (Grant ID: EP/K009494K/1), Core Capability grant (Grant ID: EP/K039520/1

    Modulation of Sn concentration in ZnO nanorod array: intensification on the conductivity and humidity sensing properties

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    Tin (Sn)-doped zinc oxide (ZnO) nanorod arrays (TZO) were synthesized onto aluminum-doped ZnO-coated glass substrate via a facile sonicated sol鈥揼el immersion method for humidity sensor applications. These nanorod arrays were grown at different Sn concentrations ranging from 0.6 to 3 at.%. X-ray diffraction patterns showed that the deposited TZO arrays exhibited a wurtzite structure. The stress/strain condition of the ZnO film metamorphosed from tensile strain/compressive stress to compressive strain/tensile stress when the Sn concentrations increased. Results indicated that 1 at.% Sn doping of TZO, which has the lowest tensile stress of 0.14 GPa, generated the highest conductivity of 1.31 S cm鈭 1. In addition, 1 at.% Sn doping of TZO possessed superior sensitivity to a humidity of 3.36. These results revealed that the optimum performance of a humidity-sensing device can be obtained mainly by controlling the amount of extrinsic element in a ZnO film

    Measurement of the cross-section and charge asymmetry of WW bosons produced in proton-proton collisions at s=8\sqrt{s}=8 TeV with the ATLAS detector

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    This paper presents measurements of the W++W^+ \rightarrow \mu^+\nu and WW^- \rightarrow \mu^-\nu cross-sections and the associated charge asymmetry as a function of the absolute pseudorapidity of the decay muon. The data were collected in proton--proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS experiment at the LHC and correspond to a total integrated luminosity of 20.2~\mbox{fb^{-1}}. The precision of the cross-section measurements varies between 0.8% to 1.5% as a function of the pseudorapidity, excluding the 1.9% uncertainty on the integrated luminosity. The charge asymmetry is measured with an uncertainty between 0.002 and 0.003. The results are compared with predictions based on next-to-next-to-leading-order calculations with various parton distribution functions and have the sensitivity to discriminate between them.Comment: 38 pages in total, author list starting page 22, 5 figures, 4 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-13
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