222 research outputs found
Spatiotemporal Changes and Driving Factors of Ecosystem Health in the Qinling-Daba Mountains
No full textRapid industrialization and urbanization have accelerated land-use changes in mountainous areas, with dramatic impacts on ecosystem health. In particular, the Qinling-Daba Mountains, as China’s central water tower, ecological green lung, and biological gene bank, have rich resource endowments and extremely high ecological value and are an important protective wall to China’s ecological security. Therefore, understanding the level of ecosystem health and its drivers in the research area contributes to the conservation and restoration of the mountain ecosystem. Based on remote sensing image data and land-use data from 2000 to 2020, we explored the spatial characteristics of ecosystem health, and supplemented with socio-economic data to explore its driving factors. The results show that (1) the ecosystem health in the study area has been continuously improved during the study period, and the regional differences in ecological organization are the most prominent; (2) the level of ecosystem health in the Qinling-Daba Mountains has been spatially improved from the peripheral areas to the central area, showing significant spatial autocorrelation and local spatial aggregation; (3) the ecosystem health is influenced by a combination of natural and anthropogenic factors, among which the negative effect of GRDP is mainly concentrated in the eastern region, the negative effect of the proportion of built-up land gradually spreads to the western region, and the positive effect of the proportion of forest land has a large scale. This study contributes to a better understanding of ecosystem health in mountainous counties in China and provides useful information for policymakers to formulate ecological and environmental management policies
Discovery of radiolaria from Upper Cretaceous Oceanic Red Beds in Daba, Kangmar and its paleogeographic implication
No full textA group of varicolored marine deposits, including red colored beds, are widespread in the Kangmar area, southern Tibet. They are lithologically similar to the Upper Cretaceous Oceanic Red Beds (CORBs) (the Chuangde Formation) outcropping at other localities in southern Tibet. At Daba locality, they are mainly composed of intercalated pelagic red clays and reddish colored pelagic limestones. Micropaleontologic study of the strata led to the discovery of radiolarians in siliceous rocks and siliceous limestones. Radiolaria preservation is mostly satisfactory and fifty-four species from forty-nine genera were identified. These allow recognition of three main radiolarian assemblages: Cavaspongia califoniaensis - Xitus spicularius assemblage. Praeconoanyomma lipmanae - Clathropyrgus titthium assemblage, and Lithostrobus punctulatus - Lithocampe marinae assemblage. Occurrence of these radiolarian assemblages indicate a Campanian age of the CORBs at Daba, corroborated by co-occurring planktic foraminifers. Radiolarian and foraminiferal microfossil evidence and lithology of the strata indicate that the sediments were deposited at the lower continental margin of the Indian continental plate and in an adjacent abyssal oceanic basin. The discovery of radiolarians from the CORBs at Daba area contributes to the paleogeographic interpretation of Late Cretaceous strata in southern Tibet and the Tethyan Himalaya. Unanswered is the remaining question: Was it the difference in palaeoceanography, such as ocean circulation, or plate tectonics, which resulted in the CORBs in the Tethyan Himalaya being younger than similar deposits in the western Tethys, where the deposition of this lithofacies had already begun in the Turonian? To answer this question more detailed biostratigraphic studies in southern Tibet are needed. (C) 2011 Elsevier B.V. All rights reserved.Geography, PhysicalGeosciences, MultidisciplinaryPaleontologySCI(E)0ARTICLE1-2127-13731
The “body of ritual” transformed: discourses and actions in the Daba rituals among the Na (Moso)
No full textAbstract Anthropologists have adopted different approaches in order to analyze discourses in ritual context. This paper, based on long-term field investigations, aims to discuss the Na’s Daba rituals from the angle of enunciation. By describing the system of ritual knowledge, namely the “body of ritual” to the Na, and by presenting the transformations of such a system in the ritual “mukrabu,” the author argues that the decomposition and the arrangement of ritual actions are essentially accomplished by the Daba’s performances of enunciation, which represents a crucial aspect of ritual processes. In this perspective, modes of various practices of discourse should constitute an important dimension of ritual studies
Acercamiento al soneto “Daba Lísida de beber a Un pájaro”, poema novohispano
No full textAn interpretative approach to the sonnet by Luis de Sandoval Zapata, titled “Lísida was Giving Drink to a
Bird” is presented, highlighting the aesthetics of the author based on the confrontation of the opposites.
Likewise, the use of four natural elements attracts attention. Therefore, we feel that this sonnet is one of
the most successful ones of Sandoval Zapata, and is, moreover, a worthy example of baroque poetry of
that time.Se presenta un acercamiento interpretativo del soneto de Luis de Sandoval Zapata, titulado “Daba Lísida
de Beber a un Pájaro”, haciendo hincapié en la estética del autor, la cual se basa en la confrontación de
contarios. De igual manera, llama la atención el uso de los cuatro elementos naturales. Por lo anterior se
concluye que dicho soneto es uno de los más logrados de Sandoval Zapata, y también una muestra digna
de la poesía barroca de la época
INFRARED AND RAMAN SPECTRA OF 4-(DIMETHYLAMINO) BENZALDEHYDE AND ITS ZINC COMPLEX
No full textAuthor Institution: Department of Chemistry, West Virginia UniversityThe resonance enhanced Raman spectrum of 4-(dimethylamino) benzaldehyde (DABA) bound to in nonaqueous solution is essentially identical to that obtained from DABA bound to the catalytic zinc in equine liver alcohol dehydrogenase. The vibrational spectra of DABA and the DABA-Zn complex will be presented and discussed
东巴、达巴口头传统研究 = A study of Dongba and Daba oral traditions
No full text本文结合田野调查搜集的资料，从口头诗学的角度审视分析东巴、达巴口诵经文。居于中国西南川滇交界地区的东巴教与达巴教是同宗共源的本土宗教，在历史上曾受到苯教以及藏传佛教影响。东巴与达巴是麽些人的祭司。两种称呼源于方言语音上的差异：西部支系称“东巴”，东部支系称“达巴”。 自十九世纪西方传教士发现东巴文以来，东巴文化的研究多集中在经书解读及文字性质的讨论，对于其口传文学的特点则着墨不多。达巴教一度被认为没有文字，直至二十世纪中其象形文书写的历书方才被发现。达巴经文依靠口传心记，但是目前尚未得到详细、深入的整理翻译。论文综述目前学者就东巴、达巴口头传统的研究成果，确立论述框架。之后从口头诗学理论所关注的命题展开论述，包括：程式（语词、句型）、主题、书写、“不一致”现象。语词程式中既有具有符号化含义的名称，亦有适应于韵律需要的名词-修饰语程式。句型程式体现了语言类型和叙述习惯的影响。主题的叙述形态可分为固定结构与非固定结构两种类型，叙事功能则有引、祝、比、兴等。书写部分将仅有的达巴月宿象形文与东巴相关文献进行比较，指出文字形态相对古老的达巴历书对于口传文化的记忆更为稳定。本文探讨的“不一致”现象包括两个支系之间宗教文化元素的差异以及经文情节中的矛盾，成因包括：文字对于口头传统文化的“干扰”、本土化过程的差异、程式与主题的叠加、宗教文化元素的程式化。本文呈现笔者从口头诗学视角对于东巴、达巴经文全面细致的剖析，对于前人研究中阙如或存疑问题的见解。并附录田野调查收集整理的汝可东巴和达巴经文语料。经文解读翻译遵照民族语、对译、通译等多行对照的标准，是为纳西东巴宝库新的原始资料。 The present study aims at a comprehensive discussion on several topics related to Dongba and Daba Oral Traditions. This work applies the Oral Composition Theory to Dongba and Daba oral cultures, including my own field work data on the Moso people. Dongba and Daba classics represent one of the few oral traditions still surviving in the world. Even if texts written through Dongba glyphs transcribing the classics are available to Dongba priests, those priests maintain intact their own oral composition strategies when they perform, reciting the classics. They follow specific formulaic patterns independent from written texts and renew the oral chants following their own tradition. These oral compositions and the related performance skills have not yet been extensively studied. The present study aims, therefore, at an in-depth analysis of Dongba and Daba oral traditions with the application of the Oral Composition Theory. The oral composition theory applies a linguistic approach and has generated a set of generic topics of oral traditions, for example, analyses of epithets, meters, combination of themes, variability of stories, etc. This dissertation reviews the currently available studies on Dongba and Daba oral traditions in order to highlight the aspects of my analysis of oral formulas. Basic topics of oral traditions, including: formulaic expressions and syntactic systems, themes, emergence of writing systems, and inconsistencies (in narratives) will be discussed. This analytic work presents a comprehensive and detailed survey of Dongba and Daba oral classics, proposing also innovative hypotheses and reconstructions of so far neglected (in previous studies) questions and issues. Moreover, this dissertation provides the first original language documentation materials collected from Ruke Dongba and Na Daba contexts by the author during her field work in these almost unexplored places.Doctor of Philosophy (HSS
Sichuan (China), view of the Daba Mountains
No full textView of the western section of the Tapa-shan looking towards Chien-ko in the east from a point above the vicinity of Chiang-yu or Chung-pa, Szechuan.Image is part of research condcuted by Harold J. Wiens for the article: The Shu Tao or Road to Szechwan
Author(s): Herold J. Wiens
Source: Geographical Review, Vol. 39, No. 4 (Oct., 1949), pp. 584-604
Published by: American Geographical Society
Stable URL: http://www.jstor.org/stable/210674http://www.jstor.org/stable/210674Grayscal
Enhancement of Destabilization and Reactivity of Mg Hydride Embedded in Immiscible Ti Matrix by Addition of Cr: Pd-Free Destabilized Mg Hydride
No full textNanometer-sized Mg hydride clusters may form in a self-organized way by the hydrogenation of a nonequilibrium Mg-Ti alloy. Here the Mg hydride is destabilized by the interface energy between the two metal hydrides. To obtain an even more destabilized Mg hydride, we increased the interface energy by the addition of Cr, which is immiscible with Mg as Ti. Indeed, Mg layers surrounded by Ti-Cr layers show hydrogen plateau pressures higher than when Mg is surrounded by Ti. Destabilization of Mg hydride is also observed in hydrogenated Mg-Ti-Cr thin-film alloys, resulting in hydrogenation plateaus flatter and at higher pressures than in hydrogenated Mg-Ti thin film alloys. Our results suggest that by screening alloys on the basis of their immiscibility with Mg, we can tune the thermodynamics and kinetics of hydrogen absorption and desorption in Mg-H. This concept paves the way for the development of light-weight and cheap Mg-based functional materials in the metal-hydrogen system.ChemE/Materials for Energy Conversion and Storag
Shaanxi (China), aerial view of Han river and Daba mountains
No full textThe Han River seen from the air above Han-chung (Nan-cheng), Shensi, with a braided channel. Looking westward up the course of the river, one sees at the upper right the Pao River entering the Han, while on the left are the foothills of the Ta-pa Shan.Image is part of research conducted by Harold J. Wiens for the article: The Shu Tao or Road to Szechwan
Author(s): Herold J. Wiens
Source: Geographical Review, Vol. 39, No. 4 (Oct., 1949), pp. 584-604
Published by: American Geographical Society
Stable URL: http://www.jstor.org/stable/210674http://www.jstor.org/stable/210674Grayscal
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