• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 162
  • 35
  • 26
  • 24
  • 24
  • 7
  • 5
  • 4
  • 4
  • 4
  • 3
  • 2
  • 2
  • 2
  • 1
  • Tagged with
  • 417
  • 56
  • 53
  • 39
  • 37
  • 30
  • 28
  • 27
  • 25
  • 25
  • 24
  • 23
  • 23
  • 22
  • 21
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
341

Diversity and ecology of ectosymbioses between sulfur-oxidizing Thiothrix bacteria and groundwater niphargid amphipods

Bauermeister, Jan 22 January 2013 (has links)
No description available.
342

Convergence and collaboration : integrating cultural and natural resource management

Malins, Stephen John 03 May 2011 (has links)
Protected heritage area management is challenged by conflicting priorities perpetuated by the real and perceived dichotomy between cultural and natural resource management, their practitioners, their disciplines, and their values. Current guidelines promote integrating cultural and natural resource management to ensure holistic management of all values within a protected heritage area. This paper uses the management of the Cave and Basin National Historic Site to illustrate challenges in protecting both historic and natural resources. A qualitative inductive study included analysis of interview and focus group data for the site and similar protected heritage areas. The gap between integrative policies and the tendency for uni-disciplinary approaches to the practice of managing protected heritage areas is investigated. Five barriers to integration, such as lack of awareness, and five methods for progress, including facilitated inclusion, are examined. The author proposes collaborative, sustainable, values-based practices for the successful integration of cultural and natural resource management.
343

The liturgical planning of Byzantine churches in Cappadocia

Teteriatnikov, Natalia. January 1996 (has links)
Originally presented as the author's Thesis (Ph. D.)--New York University, 1987. / Includes bibliographical references (p. [9]-16) and indexes.
344

The liturgical planning of Byzantine churches in Cappadocia /

Teteriatnikov, Natalia. January 1996 (has links)
Originally presented as the author's thesis (Ph. D.)--New York University, 1987. / Includes bibliographical references (p. [9]-16) and indexes. Also issued online.
345

The liturgical planning of Byzantine churches in Cappadocia

Teteriatnikov, Natalia. January 1996 (has links)
Originally presented as the author's thesis (Ph. D.)--New York University, 1987. / Includes bibliographical references (p. [9]-16) and indexes.
346

Two million years of environmental change : a case study from Wonderwerk Cave, Northern Cape, South Africa

Ecker, Michaela Sarah January 2015 (has links)
The arid interior of South Africa lacks long, continuous and well-dated climate and environmental proxy records that can be compared with cultural sequences and with broader global climate records. This thesis develops the first substantial terrestrial environmental sequence for the interior of southern Africa at the site of Wonderwerk Cave, spanning two million years of prehistory. Changes in vegetation and humidity over time were investigated by means of carbon and oxygen stable isotope analysis on fossil herbivore enamel and ostrich eggshell, creating two independent proxy datasets. The Holocene record was used as a baseline for comparing the Pleistocene sequence, but required chronological tightening. Therefore, nine new radiocarbon dates were obtained, and calibrated and modelled with existing dates to provide a firmer chronology. The ostrich eggshell isotope record suggests arid but variable conditions, with distinct phases of increased humidity in the Early Pleistocene and mid-Holocene. Enamel stable isotope results show clear differences in local resource availability between the Early and Mid-Pleistocene, and then between the Pleistocene and Holocene, with an overall trend of increasing aridity. In particular, the onset of dietary specialisation in grazers at 0.8Ma is linked to expanding C4 grasslands. Aridity was not the driver behind the increase in C4 grasses, but changing pCO2 levels at the Mid Pleistocene transition were identified as a possible key factor. The presence of C3 and C4 grasses in the Early Pleistocene, when compared to the domination of C4 grasses today, was fostered by reduced rainfall seasonality. Regional independent developments have to be considered, as other regions in South and East Africa show C4 dominated diets in herbivores at earlier times than at Wonderwerk Cave. In the Holocene, higher temporal resolution indicates phases of environmental change coinciding with changes in the cultural record.
347

A Revision Of The Pikimachay, Ayacucho’ Evidences, A Terminal Pleistocene Occupation In The Central Andes / Revisión de las evidencias de Pikimachay, Ayacucho, ocupación del Pleistoceno Final en los Andes Centrales

Yataco, Juan José 10 April 2018 (has links)
The earliest strata from Pikimachay Cave, the Pacaicasa and Ayacucho complexes has been one of the more controversial occupations of Terminal Pleistocene in the Central Andes. Due to the inconsistent presentation of findings, assumptions regarding the lithic and bone assemblages have been questioned. Therefore, a new review of these remains is required to assess the evidence in detail, because it is probably the earliest in the Central Andes. Preliminary results of these assemblages document lithic technologies and bones of the Ayacucho Complex, with probable anthropogenic cut marks, dated by radiocarbon correction between 15,781 to 14,886 cal BC. / Los estratos denominados complejos Pacaicasa y Ayacucho de la cueva de Pikimachay constituyen las ocupaciones más controversiales del Pleistoceno Final por contener, supuestamente, los restos de actividad humana más antiguos de los Andes Centrales. Debido a la pobre presentación de las evidencias en las escasas publicaciones que trataron del hallazgo, se puso en tela de juicio las presuntas herramientas líticas y óseas reportadas. Por consiguiente, se impuso una revisión de los restos con el objeto de evaluarlosen detalle. De manera específica, se pudieron examinar los restos guardados en el Museo de Arqueología y Antropología de la Universidad Nacional Mayor de San Marcos y los resultados preliminares documentaron tecnologías líticas e, incluso, huesos conprobables huellas de corte antropogénico. La corrección radiocarbónica del fechado procedente del complejo Ayacucho arrojó un lapso entre 15.781 y 14.886 cal AC.
348

Dinâmica ambiental espeleológica : memória, conservação e educação

Donato, Christiane Ramos 29 February 2016 (has links)
Fundação de Apoio a Pesquisa e à Inovação Tecnológica do Estado de Sergipe - FAPITEC/SE / Environmental dynamics speleological (EDS) refers to a new field of knowledge built from the theoretical and methodological interaction for understanding a complex object (cave). The knowledge needed to support the construction of environmental dynamics speleological permeates various sciences to Landscape Ecology, ecodynamic, Geomorphology carstic, Human Ecology, Geology, Paleontology, Archaeology, Psychology and Epistemology, which characterized this work as interdisciplinary. The general objective set out to build parameters (indexes, study methodologies and speleological analysis of operational base) which validate the existence, relevance and contributions of caving studies based on the idiosyncrasies of each place as complex unit in operation and composition structure. Environmental dynamics speleological work on the relationship between its three constituent elements (memory, conservation and education) was the purpose of this thesis. The speleological environmental dynamics, speleological memory, speleological conservation and speleological education were respected, characterized, had their principles and identified and evaluated methods. The research was fundamental and applied nature with construction of empirical and epistemological product analysis and synthesis for research in Speleology: (1) extemporoendografias; (2) the environmental dynamic index speleological; (3) the check list to identify risk factors present in the cave, which may affect visitors, academics and workers; (4) the check list of speleological conservation actions; (5) the concepts of Speleological environmental dynamics and speleological memory; (6) the "Veredas da Terra” Exhibition; (7) the learning environment "artificial cave"; and (8) Learning features the "3D cave model," "pendrive-morcego" and "update course - No Centro, a Terra: Espeleologia, ensino e interdisciplinaridade”". There were two Sergipe caverns evaluated to test the methodological tools (1-3): Toca da Raposa in Simão Dias and Pedra Branca in Maruim. Application was built escalas tempográficas to present extemporoendografias (photos, audios, videos, maps) of the two caves studied, which can be viewed on smartphones, tablets and computers. Based on the evaluation of the Environmental Dynamic Index Speleological (EDIS), the Pedra Branca cave (Maruim/SE) and Toca da Raposa (Simão Dias/SE) were classified as intermediate metastability, with the first being in positive trend change and the second in negative trend. Note that most of the contaminants found in caves studied which can affect humans are of a biological nature (fungi, bacteria, viruses, venomous animals, which can cause disease and poisoning), while the contaminants that can affect the caverns are primarily of chemical origin (pesticides, heavy metals...). While environmental imbalances were more physical (with offset blocks, broken speleothems and presence of engineering works). As the wells studied do not have bodies of standing water, contamination and imbalances are observed more on the spot, without spread to the surrounding area by ground water or atmospheric air. All environments and learning resources are being applied to assist in environmental dynamics speleological and his memory. Thus, it takes further studies regarding the application of constructed objects to assist the development of educational practices factors on caving environments. / A Dinâmica Ambiental Espeleológica (DAE) refere-se a um novo campo de conhecimento construído a partir da interação teórico-metodológica para compreensão de um objeto complexo (caverna). O conhecimento necessário para apoiar a construção da Dinâmica Ambiental Espeleológica perpassa por várias ciências como Ecologia da Paisagem, Ecodinâmica, Geomorfologia Cárstica, Ecologia Humana, Geologia, Paleontologia, Arqueologia, Psicologia e Epistemologia, o que caracterizou esse trabalho como interdisciplinar. Como objetivo geral propôs-se construir parâmetros (indicadores, metodologias de estudo e de análise espeleológica de base operativa) que validassem a existência, pertinência e contribuições de estudos espeleológicos baseados na idiossincrasia de cada geótopo como unidade complexa em funcionamento e estrutura de composição. Trabalhar a Dinâmica Ambiental Espeleológica na articulação entre seus três elementos constituintes (memória, conservação e educação) foi a finalidade desta tese. A dinâmica ambiental espeleológica, a memória espeleológica, a conservação espeleológica e a educação espeleológica foram conceituadas, caracterizadas, tiveram seus princípios e métodos identificados e avaliados. A pesquisa teve natureza fundamental e aplicada com construção de produtos empíricos e epistemológicos de análise e síntese para pesquisas em Espeleologia: (1) as extemporoendografias; (2) o Índice de Dinâmica Ambiental Espeleológica; (3) o check list de identificação de fatores de riscos presentes na caverna, que podem acometer visitantes, acadêmicos e trabalhadores; (4) o check list de ações de conservação espeleológica; (5) os conceitos de dinâmica ambiental espeleológica e memória espeleológica; (6) a Exposição “Veredas da Terra”; (7) o ambiente de aprendizagem “caverna artificial”; e (8) os recursos de aprendizagem “maquete de caverna 3D”, “pendrive-morcego” e “Curso de aperfeiçoamento “No Centro, a Terra: Espeleologia, ensino e interdisciplinaridade”. Foram duas as cavernas sergipanas avaliadas para testar os instrumentos metodológicos (1 a 3): Toca da Raposa, em Simão Dias e Pedra Branca, em Maruim. Foi construído aplicativo Escalas Tempográficas, para apresentar extemporoendografias (fotos, áudios, vídeos, mapas) das duas cavernas estudadas, o qual pode ser visualizado em smartphones, tablets e computadores. Com base na avaliação do Índice de Dinâmica Ambiental Espeleológica (IDAE), as cavernas Gruta da Pedra Branca (Maruim/SE) e Toca da Raposa (Simão Dias/SE) foram classificadas em metaestabilidade intermediária, com a primeira estando em tendência positiva de alteração e a segunda em tendência negativa. Nota-se que a maioria dos contaminantes encontrados nas cavernas estudadas que podem afetar o ser humano é de natureza biológica (fungos, bactérias, vírus, animais peçonhentos, que podem causar doenças e envenenamento), enquanto os contaminantes que podem afetar as cavernas são principalmente de origem química (defensivos agrícolas, metais pesados, etc.). Enquanto os desequilíbrios ambientais foram mais físicos (com deslocamento de blocos, quebra de espeleotemas e presença de obras de engenharia). Como as cavidades estudadas não possuem corpos d’água permanentes, as contaminações e desequilíbrios são observados mais no próprio local, sem espalharem-se para a região do entorno pelo lençol freático ou ar atmosférico. Todos os ambientes e recursos de aprendizagem estão sendo aplicados, para auxiliar na dinâmica ambiental espeleológica e sua memória. Assim, é necessário mais estudos posteriores a respeito da aplicação dos objetos construídos para auxiliar os fatores de desenvolvimento de práticas educativas sobre ambientes espeleológicos.
349

Impactos ambientais nos aspectos geomorfológicos da área de proteção ambiental de Presidente Figueiredo, Caverna do Maroaga

Gadelha, Eloisa Mendonça 28 April 2006 (has links)
Made available in DSpace on 2015-04-11T13:54:34Z (GMT). No. of bitstreams: 1 Dissertacao Final Eloisa Gadelha.pdf: 3280502 bytes, checksum: 639494812b097159fe14213795eb8a11 (MD5) Previous issue date: 2006-04-28 / Fundação de Amparo à Pesquisa do Estado do Amazonas / The Presidente Figueiredo Maroaga Cave Protected Area is located in the township of Presidente Figueiredo. It is a State regulated protected area and allows limited use. It is known for its geomorpholocial aspects such as caves and waterfalls. Due to these characteristics, tourism is present, as well as agriculture, mainly the cultivation of the cupuaçu fruit (Theobroma grandiflora). The protected area was created over fifteen years ago and does not yet have a management plan. This study addresses tourism, agricultural activities and the geomorphological changes due to these activities, looking at the current situation comparing it with the law. Tourism was analyzed in three geographically close areas: The Maroaga Cave, The Santuário Waterfalls and the Porteira Rapids. Infrastructure and the intensity of public use were selected as indicators. Agricultural analysis was studied using natural, social and economic indicators in four communities: Marcos Feire, São Francisco de Assis, Boa Esperança and Jardim Floresta. Tourism was characterized as a predatory activity due to large changes in waste dispersal, grafitti on outcrops and removal of vegetation which provoke erosion. Agriculture in the communities is of low productivity, mainly from families that are already self-sufficient, environmental changes are linked to removal of the vegetation which is on the average 9,5% per area and to the use of fertilizers on leafy vegetable cultivation . / A Área de Proteção Ambiental Presidente Figueiredo Caverna do Maroaga, situada no município de Presidente Figueiredo, é uma unidade de conservação estadual de uso direto, reconhecida por seus singulares aspectos geomorfológicos, como sistemas espeleológicos e quedas d´água. Devido a estes atributos, a atividade turística se faz presente, além da agricultura, destacada pelo cultivo do cupuaçu (Theobroma grandiflora). A área foi criada há mais de quinze anos e ainda não dispõe de um plano de manejo. O presente trabalho analisou a prática das atividades de turismo e de agricultura, as alterações nos aspectos geomorfológicos, decorrentes destas atividades, e a atual situação da área, comparando-a com a legislação vigente. Infra-estrutura e intensidade de uso público foram os indicadores selecionados para a análise do turismo nos atrativos naturais caverna Refúgio do Maroaga, Cachoeiras do Santuário e da Porteira. A análise da agricultura foi feita a partir de indicadores de natureza social, econômica e ambiental, nas comunidades Marcos Freire, São Francisco de Assis, Boa Esperança e Jardim Floresta. Nos atrativos naturais, o turismo caracteriza-se como predatório. As alterações significantes são dispersão de resíduos, inscrições em afloramentos rochosos e retirada da cobertura vegetal, o que provoca erosões e assoreamento. Nas comunidades foi verificada a prática de uma agricultura de baixa produtividade, predominando famílias hipossuficientes. As alterações ambientais estão interligadas à retirada da cobertura vegetal, com um índice médio de 9,5% por terreno; e à utilização de agrotóxicos, concentrada no cultivo de hortaliças.
350

Estudo microclimático do ambiente de cavernas, Parque Estadual Intervales, SP / Microclimate study of caves enviroment, Parque Estadual Intervales, SP

Bárbara Nazaré Rocha 31 August 2010 (has links)
A proteção ambiental dos recursos geológicos é uma questão com crescente interesse. A exploração de cavernas é uma das formas de turismo associada a recursos geológicos mais difundida. Por isso, deve-se conhecer suas características ambientais, tais como os climáticas, para definir estratégias de gestão e conservação ambiental associadas a seu uso turístico. Assim, o objetivo geral da pesquisa é detectar as principais alterações microclimáticas ocorridas no ambiente cavernícola em decorrência das visitas turísticas no interior das grutas do PEI, SP. Como objetivos específicos, definiu-se: caracterizar o microclima do ambiente de caverna em condições naturais e elencar características físicas da cavidade que influenciem em seu microclima. A metodologia consistiu na coleta de dados de temperatura e umidade relativa do ar de nove cavidades com registradores autônomos. Também foram registrados os valores de CO2. A variação dos atributos do clima foi analisada em situação natural e na presença de visitantes. Os resultados mostram que o microclima das cavernas tende à estabilidade dos valores de temperatura do ar e apresentam umidade relativa do ar e concentração de gás carbônico elevada. Cavernas com rios caudalosos e claraboias não apresentam impacto em sua atmosfera decorrente do turismo, pois as trocas gasosas com o meio externo são facilitadas. Nas grutas secas e afóticas, com entradas e corredores estreitos, o microclima tende à estabilidade, estando mais sujeito a impactos, especialmente elevações na temperatura do ar. O uso de carbureteira também gera acréscimos significativos nas concentrações de gás carbônico. / The ambient protection of the geologic resources is a question with increasing interest. The caves exploration is one of the geological tourism forms more spread out. Therefore, the characteristics of its ambient must be known, such as the climatic ones, to define strategies of management and ambient conservation associates with its tourist use. Thus, the general objective of this research is to detect the main microclimatic alterations in the cave environment in result of the tourist visits in the interior of grottos of PEI, SP. As specific objective, it was purposed to characterize the cave microclimate in natural conditions and to detect the physics characteristics of the caves that influence in its microclimate. The methodology consisted in collect data of temperature and relative humidity of the air of nine caves with automatic sensors. Also the values of carbonic gas had been registered. The variation of the climatic attributes was analyzed in natural situation and in presence of visitors. The results show that the caves microclimate tends to have stability values of air temperature and present high values of air relative humidity and carbonic gas concentration. Caves with rivers of great volume and skylights do not present impact in its atmosphere, even in the presence or tourists, because the gaseous exchanges with the external way are facilitated. In dry and dark grottos, with narrow entrances and corridors, the microclimate tends to stability, being subject to impacts, especially rises in the air temperature.

Page generated in 0.036 seconds