198 research outputs found

    Certain subclass of Pascu-type bi-starlike functions in parabolic domain

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    Estimates on the coefficients |a2| and |a3| are obtained for normalized analytic function f in the open disk with f and its inverse g = f−1 satisfy the condition that zf0(z) + λz2f00(z)(1 − λ)f(z) + λzf0(z) and zg0(z) + λz2g00(z)(1 − λ)g(z) + λzg0(z)(0 ≤ λ ≤ 1) are both subordinate to an analytic function in parabolic region. Furthermore, we estimate the Fekete-Szegö functional for f ∈ PΣ,P (λ, ϕα).Publisher's Versio

    Asian elephant movement ecology within human-elephant conflict landscape in Johor, peninsular Malaysia

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    As the largest terrestrial animal on earth, elephants perform important and irreplaceable ecological roles within their natural ecosystems. However, elephants are regarded as pests owing to significant damages they can cause to farms. Farmers find elephants extremely difficult to manage due to elephants’ vast appetite, high degree of intelligence to circumvent mitigating efforts, and potential for causing harm. In Malaysia, movement ecology of wildlife is challenging to be incorporated into conservation actions due to lack of direct sightings in the rainforest and difficulty to deploy tracking devices on endangered species. However, the growing database of Asian elephant (Elephas maximus) GPS movement in Malaysia provides opportunities for researchers to elucidate the movement ecology and spatial needs of Asian elephant that can benefit both conservation and management in a variety of ways (e.g., mitigation measures). This study aims to help the agriculture community to manage Human-Elephant Conflict in Johor, Malaysia and promote coexistence with elephants. The objectives of this study are to estimate the home range sizes of collared elephants in Johor using dynamic Brownian Bridge Movement Models and, to determine the impact of land use changes on elephant movement pattern using spatial and pathway analysis. We analysed GPS telemetry data from eight elephant individuals in Johor between 2020 – 2022, and found the elephants to have large area requirements, with mean home ranges (95% utilization) of 245 km² (min-max range 142 km² – 326 km²). The home range sizes were smaller when the proportion of agricultural land used within its home range was higher (R2 = 0.56, p-value = 0.033, F1,6 = 7.58) and when the proportion of forest within its home range was smaller (R2 = 0.59, p-value = 0.027, F1,6 = 8.52). Least-cost path and Circuitscape analyses of possible corridors connecting the core area (50% utilization home range) were used to visualized landscape connectivity and help informed potential sites for the development of corridors in future. This thesis contributes to a better understanding of Asian elephant movements and space use within agricultural and forested landscapes, and help support conservation management of Asian elephants and their habitat

    Asian elephant movement ecology within human-elephant conflict landscape in Johor, peninsular Malaysia

    Get PDF
    As the largest terrestrial animal on earth, elephants perform important and irreplaceable ecological roles within their natural ecosystems. However, elephants are regarded as pests owing to significant damages they can cause to farms. Farmers find elephants extremely difficult to manage due to elephants’ vast appetite, high degree of intelligence to circumvent mitigating efforts, and potential for causing harm. In Malaysia, movement ecology of wildlife is challenging to be incorporated into conservation actions due to lack of direct sightings in the rainforest and difficulty to deploy tracking devices on endangered species. However, the growing database of Asian elephant (Elephas maximus) GPS movement in Malaysia provides opportunities for researchers to elucidate the movement ecology and spatial needs of Asian elephant that can benefit both conservation and management in a variety of ways (e.g., mitigation measures). This study aims to help the agriculture community to manage Human-Elephant Conflict in Johor, Malaysia and promote coexistence with elephants. The objectives of this study are to estimate the home range sizes of collared elephants in Johor using dynamic Brownian Bridge Movement Models and, to determine the impact of land use changes on elephant movement pattern using spatial and pathway analysis. We analysed GPS telemetry data from eight elephant individuals in Johor between 2020 – 2022, and found the elephants to have large area requirements, with mean home ranges (95% utilization) of 245 km² (min-max range 142 km² – 326 km²). The home range sizes were smaller when the proportion of agricultural land used within its home range was higher (R2 = 0.56, p-value = 0.033, F1,6 = 7.58) and when the proportion of forest within its home range was smaller (R2 = 0.59, p-value = 0.027, F1,6 = 8.52). Least-cost path and Circuitscape analyses of possible corridors connecting the core area (50% utilization home range) were used to visualized landscape connectivity and help informed potential sites for the development of corridors in future. This thesis contributes to a better understanding of Asian elephant movements and space use within agricultural and forested landscapes, and help support conservation management of Asian elephants and their habitat

    New subclasses of bi-univalent functions of complex order associated with hypergeometric functions

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    In the present paper, new subclasses of bi-univalent functions of complex order associated with hypergeometric functions are introduced and coefficient estimates for functions in these classes are obtained. Several new (or known) consequences of the results are also pointed out.Publisher's Versio

    an efficient and practical synthesis of 1 aryl 1h 3h thiazolo 3 4 a benzimidazole using silica supported sodium hydrogen sulfate as a heterogeneous catalyst

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    Silica-supported sodium hydrogen sulfate (NaHSO4·SiO2) efficiently catalyzed the three-component reactions of o-phenylenediamine, 2-mercaptoacetic acid, and aromatic aldehydes, and it formed the corresponding 1-aryl-1H,3H-thiazolo[3,4-a]benzimidazole. The catalyst is inexpensive and eco-friendly and works under heterogeneous conditions

    Facile solid-state synthesis of eco-friendly sodium iron silicate with exceptional sodium storage behaviour

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    The final publication is available at Elsevier via https://dx.doi.org/10.1016/j.electacta.2018.07.034 © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/It is crucial to develop stable energy sources for rechargeable sodium-ion batteries using simple synthesis methods. Herein, we report a facile route for synthesizing phase-pure carbon-coated Na2FeSiO4 polyanionic cathodes using conventional solid-state methods at 700 °C under inert atmosphere. X-ray diffraction results reveal that there are no impurities in the highly crystalline Na2FeSiO4 particles, resulting from the heat of combustion provided by the organic chelating agent. The electrochemical behaviour of Na2FeSiO4 particles is tested within 1.5–4.5 V at 0.25 C. The Na2FeSiO4 cathode delivered 119 mAh g−1 at 0.25 C and maintained ∼85% of its initial capacity after 200 cycles after activation process. Even at high current densities of 3.5 C, the material outperforms other orthosilicates-based cathodes reported with capacities of 55 mAh g−1 discharge capacity along with ∼80% retention after 1000 cycles. The enhanced performance of carbon-coated Na2FeSiO4 particles is ascribed to the improved electronic conductivity by the incorporation of carbon and the presence of void space between the particles. This void space contains more electrolytes and eliminates the stress formed during the cycling process, thus improving stability even at high rates. This is the first report on obtaining phase pure metal orthosilicate material with negligible impurities using simple solid-state method along with such exponential electrochemical performances.Natural Sciences and Engineering Research Council of Canad

    Metagenome: differences in the gut microbiota among healthy, obese and type 2 diabetes adults

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    The association between gut microbiota composition with pathogenesis of metabolic diseases namely obesity and type 2 diabetes are increasingly recognized. The aim of the study was to identify the diversity of gut microbiota phylum and families in the gut of healthy, obese and type 2 diabetes adults with metagenomic approach. Six healthy subjects, five obese subjects and five type 2 diabetes subjects of similar inclusion and exclusion criteria were recruited. The different bacterial phyla and families in the stool sample were analyzed with metagenomic analysis. The median (IQR)% of relative abundance for each phylum and families were analyzed. The obese subjects had higher Bacteroidetes 63.50(21.55)% with lower Firmicutes 27.00(13.55)%, meanwhile, the type 2 diabetes subjects also had higher Bacteroidetes 66.50(39.00)% with lower Firmicutes 27.70(19.35)%. These findings shows that there are differences in the gut microbiota composition in the healthy, obese and type 2 diabetes adults which may influence the development of obesity and type 2 diabetes

    Structural basis of SNAPc-dependent snRNA transcription initiation by RNA polymerase II

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    RNA polymerase II (Pol II) carries out transcription of both protein-coding and non-coding genes. Whereas Pol II initiation at protein-coding genes has been studied in detail, Pol II initiation at non-coding genes, such as small nuclear RNA (snRNA) genes, is less well understood at the structural level. Here, we study Pol II initiation at snRNA gene promoters and show that the snRNA-activating protein complex (SNAPc) enables DNA opening and transcription initiation independent of TFIIE and TFIIH in vitro. We then resolve cryo-EM structures of the SNAPc-containing Pol IIpre-initiation complex (PIC) assembled on U1 and U5 snRNA promoters. The core of SNAPc binds two turns of DNA and recognizes the snRNA promoter-specific proximal sequence element (PSE), located upstream of the TATA box-binding protein TBP. Two extensions of SNAPc, called wing-1 and wing-2, bind TFIIA and TFIIB, respectively, explaining how SNAPc directs Pol II to snRNA promoters. Comparison of structures of closed and open promoter complexes elucidates TFIIH-independent DNA opening. These results provide the structural basis of Pol II initiation at non-coding RNA gene promoters
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