Showing 421 - 440 results of 657 for search '"extinction"', query time: 0.04s Refine Results
  1. 421

    Physical and mechanical properties of wood of plantation grown Albizia lebbeck in the savannah ecological zone, Ghana by Enoch Gbapenuo Tampori, Francis Kofi Bih, Kwaku Antwi, Issah Chakurah

    Published 2024-06-01
    “…To better consider Albizia lebbeck as a substitute for wood species which are being seriously over-exploited to the point of commercial extinction, its wood properties were characterized to expatiate its utilization potentials. …”
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    Article
  2. 422

    Towards Sustainable Preservation: Revitalising Indigenous African Instruments and Craftsmanship by Ntshengedzeni Evans Netshivhambe

    Published 2024-11-01
    “…This study addresses a critical gap in the scholarship of indigenous African music by shifting the focus from preventing the extinction of musical traditions to ensuring the sustainability of indigenous African instruments within academic frameworks. …”
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    Article
  3. 423

    Magnetorefractive effect in metallic Co/Pt nanostructures by А. N. Yurasov, D. A. Sayfulina, Т. N. Bakhvalova

    Published 2024-04-01
    “…The dependence was expressed explicitly using the basic formulas for permittivity, refraction and extinction coefficients, and optical conductivity. This then confirms the common nature of these two effects. …”
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  4. 424

    Dual subwavelength-grating topology for building polarization beam splitters by Chia-Chih Huang

    Published 2025-01-01
    “…By optimizing the duty cycles along transverse and longitudinal directions of the DSWG structure, the device length is reduced by approximately 40%, and the polarization extinction ratio (PER) of the TM mode is improved by ∼5 dB at a wavelength of 1.55 μ m, compared to a single subwavelength grating structure. …”
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    Article
  5. 425

    Combination of thidiazuron and basal media type on optimizing in vitro growth of Grammatophyllum stapeliiflorum orchids by Yuniati, Mayta Novaliza Isda

    Published 2024-03-01
    “… Grammatophyllum stapeliiflorum, recognized as the melancholic orchid, represents one of the elusive orchid species facing the brink of extinction, thus exacerbating its rarity. Tissue culture technology becomes imperative for the propagation of this orchid species. …”
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    Article
  6. 426

    Accuracy Analysis of the Aerosol Backscatter Coefficient Profiles Derived from the CYY-2B Ceilometer by Lei Liu, Ting Zhang, Yi Wu, Qi Wang, Taichang Gao

    Published 2018-01-01
    “…The limited range of extinction integration is the main cause of this problem.…”
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  7. 427

    Delineating the environmental justice implications of an experimental cheetah introduction project in India by Yashendu C. Joshi, Stephanie E. Klarmann, Stephanie E. Klarmann, Louise C. de Waal

    Published 2025-02-01
    “…Project Cheetah in Kuno National Park was initiated to establish a population of African cheetahs in India due to the Asiatic subspecies’ extinction in the country since the 1950s. The project has received criticism from international conservationists for lacking conservation and scientific merit. …”
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    Article
  8. 428

    Ultra-large nonlinear parameters and all-optical modulation of a transition metal dichalcogenides on silicon waveguide by Tianyang Ding, Siqin Xu, Xianlong Sun

    Published 2025-01-01
    “…Based on this, we designed all-optical TMDCs-on-SOI phase and extinction waveguide modulators, achieving $$\pi$$ -phase and 3 dB modulation with millimeter-scale modulation lengths under an optical pump intensity of 1 GW/ $$\textrm{cm}^{2}$$ at the optical communication wavelengths of 1310 nm and 1550 nm. …”
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  9. 429

    Spectrophotometric Determination of Cr(III) and Pb(II) Using Their Complexes with 5,11,17,23-Tetra[(2-ethyl acetoethoxyphenyl)(azo)phenyl]calix[4]arene by Le Van Tan, Tran Quang Hieu, Nguyen Van Cuong

    Published 2015-01-01
    “…Additionally, the molar extinction coefficients were 5 × 104 and 1.42 × 104 for TEAC-Pb(II) and TEAC-Cr(III), respectively. …”
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  10. 430

    Recently Delisted Songbird Harbors Extensive Genomic Evidence of Inbreeding, Potentially Complicating Future Recovery by Anna María Calderón, Andrew W. Wood, Zachary A. Szpiech, David P. L. Toews

    Published 2024-12-01
    “…ABSTRACT The Kirtland's warbler (Setophaga kirtlandii) is a rare migratory passerine species and habitat specialist of the North American Jack Pine Forests. Their near extinction in the 1970s classified them as endangered and protected under the Endangered Species Act of 1973. …”
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  11. 431

    A two-patch prey-predator model with predator dispersal driven by the predation strength by Yun Kang, Sourav Kumar Sasmal, Komi Messan

    Published 2017-07-01
    “…Our analytical results combined with bifurcation diagrams suggest that: (1) dispersal may stabilize or destabilize the coupled system; (2) dispersal may generate multiple interior equilibria that lead to rich bistable dynamics or may destroy interior equilibria that lead to the extinction of predator in one patch or both patches; (3) Under certain conditions, the large dispersal can promote the permanence of the system. …”
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  12. 432

    Coupling mechanisms of plasmon resonance and Bi3+ emission in YAG: Bi, Ce, Yb epitaxial films at low temperatures by Markiyan Kushlyk, Yaroslav Shpotyuk, Volodymyr Tsiumra, Yaroslav Zhydachevskyy, Lev-Ivan Bulyk, Volodymyr Haiduchok, Ihor Syvorotka, Dmytro Sugak, Matej Baláž, Andrzej Suchocki

    Published 2025-01-01
    “…High enhancement factors were associated with closely matching the maximum of plasmon extinction and Bi3+ emission bands. The maximum value of enhancement factor near 170% at 4 K was obtained. …”
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  13. 433

    Modeling Approach for Determining Equivalent Optical Constants of Plastic Shading Nets under Solar Radiation Conditions by A. M. Abdel-Ghany, I. M. Al-Helal

    Published 2012-01-01
    “…., equivalent refractive indexes, neq, and equivalent extinction coefficients, σeq). Here a physical model to determine neq and σeq of plastic nets was described in analogy to homogeneous translucent materials. …”
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  14. 434

    Source-independent quantum random number generators with integrated silicon photonics by Yongqiang Du, Xin Hua, Zhengeng Zhao, Xiaoran Sun, Zhenrong Zhang, Xi Xiao, Kejin Wei

    Published 2025-01-01
    “…Our SI-QRNG system achieves a low error rate of only 0.21%, thanks to the inherent stability of the silicon-based decoder chip and its excellent polarization extinction ratio. Additionally, by using a laser with a higher repetition rate and a robust simulation model, we achieve the highest quantum random number generation rate of 9.49 Mbits per second. …”
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  15. 435

    Analysis of geotourism system in Firoozkouh township and presentation of its development model from the perspective of geopark capability by somayeh jahantigh mand, amir karam, ezat ghanavati

    Published 2025-06-01
    “…The results show that most of the geosites in the region, despite their high representation, educational potential, and aesthetic value, have a weak connection with the local community, and their vulnerability and risk of extinction are increasing. Also, from the perspective of assessing the geopark capabilities, it was determined that this county currently does not have the capability to become an independent geopark. …”
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  16. 436

    Książka w środowisku lokalnym i regionalnym by Jacek Wojciechowski

    Published 2007-01-01
    “…The changes that are currently taking place in public communication, especially those influenced by IT, have triggered opinions that traditional forms of communication, especially paper forms, are on the verge of extinction. In fact, however, complementary coexistence of both forms of communication, after a careful segmentation process of functioning areas, is more likely to happen. …”
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    Article
  17. 437

    Parque das Neblinas: an important reserve for Atlantic Forest bird conservation in Southeast Brazil by Fabio Schunck, Bruno Rennó, Fernando I. de Godoy, Gérard Baudet, Kleber E. Rodrigues, Tomas Sigrist, Marcelo Bokermann

    Published 2025-02-01
    “…Data consolidation resulted in 293 bird species for PN, including 88 endemic and nine threatened with extinction. Two-hundred and fifty-seven species were recorded by different researchers and bird observers while 141 were recorded by the field inventory, which added 24 species to the total list, showing great potential for new research. …”
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  18. 438

    When Heidegger is a producer: being ecological according to version of Timothy Morton by A. G. Ivanov, I. N. Pupysheva

    Published 2019-09-01
    “…Morton’s unusual approach develops the ideas of Graham Harman, Immanuel Kant and Martin Heidegger, but does not offer any panacea in the era of mass extinction. Morton rather questions our own concern about finding this panacea. …”
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  19. 439

    Statistical Comparison of Cloud and Aerosol Vertical Properties between Two Eastern China Regions Based on CloudSat/CALIPSO Data by Yujun Qiu, Jing Wang, Keran Yang

    Published 2017-01-01
    “…The differences in COP between the two regions in the mixed cloud layer and ice cloud layer (<−40°C) had good correlations with those in the aerosol extinction coefficient. A radar reflectivity factor greater than −10 dBZ occurred mainly in warm cloud layers and mixed cloud layers. …”
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  20. 440

    Integration of High-Performance Nanocrystalline TiO2 Photoelectrodes for N719-Sensitized Solar Cells by Ke-Jian Jiang, Jin-Ming Zhou, Kazuhiro Manseki, Qi-Sheng Liu, Jin-Hua Huang, Yan-lin Song, Shozo Yanagida

    Published 2013-01-01
    “…Such an optical effect of the NIR-light scattering TiO2 electrodes will be beneficial when the sensitizers with low molar extinction coefficients, such as N719, are introduced in the device.…”
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