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  • 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.
171

Extrakce informací ze slabě strukturovaného textu / Information Extraction from Loosely Structured Text

Minárik, Matej January 2016 (has links)
Nowadays we are speaking about Web 2.0, which means the web of documents rather than the web of data. Documents are mostly unstructured, or just partially structured, but search engines need data in structured form in order to provide better search results. The process of extracting structured data from partially structured documents is the main goal of this work. In this work we are analyzing information extraction methods, namely classification methods, which need annotated training data, in order to create their inner model. We also analyze methods, which do not need training. These methods are initialized with a few data examples we are interested in extracting. We propose an extraction method in order to extract therapeutic indications and active substances from medical information sheets.
172

Návrh změny technologie spojování součástí pro specifické účely / A proposal of innovation technology for joining of components for specific purposes

Berka, Miroslav January 2017 (has links)
The main goal of the diploma thesis is a proposal of alternative metal sheets joining technology which would replace the current technology of spot welding. Different variants have been proposed, and the one which suits the most, the technology of clinching, was compared to the existing one. The costs have been calculated and following results have been concluded: the return of investment of clinching press is about 2 years. In the case of handheld tongs it is 1 and a quarter of a year. Annual savings of clinching press are 234 485 Kč, and in the case of handheld tongs are 258 019 Kč.
173

Doklady kontinentálního zalednění v reliéfu Moravské brány / Geomorphological evidence of the Scandinavian glaciation in the Moravian Gate

Pavurová, Zuzana January 2010 (has links)
Geomorphological evidence of the Scandinavian glaciation in the Moravian Gate Abstract This thesis is aimed at area in the Moravian Gate which was covered by continental ice sheets during the Quaternary. The goal of this thesis is to analyze results of work of Tyrá ček (2006). Main parts of this thesis are: current views on the extent of glaciated area, definition ice-marginal landforms, methods my fieldwork, results and discussion. Maps and graphs were created as a part of this thesis. Data was processed using MapInfo Professional 7.0 SCP software, ArcGIS 9 software a Microsoft Office Excel 2003.
174

Doklady kontinentálního zalednění v reliéfu Moravské brány / Geomorphological evidence of the Scandinavian glaciation in the Moravian Gate

Pavurová, Zuzana January 2011 (has links)
Geomorphological evidence of the Scandinavian glaciation in the Moravian Gate Abstract This thesis is aimed at area in the Moravian Gate which was covered by continental ice sheets during the Quaternary. The goal of this thesis is to analyze relief and ice-margin landforms in the Moravian Gate. Main parts of this thesis are: current views on the extent of glaciated area, definition ice-marginal landforms, methods my fieldwork, results and discussion. Maps and graphs were created as a part of this thesis. Present relief is very different from pleistocene relief. It is difficult find ice-margin landforms. I agree with extent of pleistocene ice sheet glaciations from Tyráček (2006).
175

Polykrystalická keramika transparentní pro viditelné a infračervené vlnové délky / Transparent polycrystalline ceramics at visible and infrared wavelenghts

Veselý, Jan January 2010 (has links)
his thesis deals with preparation of transparent ceramic sheets made out of sub-µm alumina powder. Green bodies are prepared by ultraviolet (UV) curing of UV curable resin containing ceramic powder followed by debinding of organic parts at elevated temperature. High relative density of green bodies is essential for reduction of shrinkage during subsequent sintering process. Therefore high solids loading dispersions containing > 57 vol% ceramic particles are used. To reach transparent behaviour, porosity within the sheets must be reduced completely. Therefore hot isostatic pressing (HIP) is used as a final operation. Finally, light transmission and hardness measurements are presented. Possibilities of making high resolution microstructures using maskless lithography and some suggestions for use of the UV curing technique for production of complex-shaped 3D structures are briefly mentioned.
176

Functionalization and Characterization of Chemical Vapor Deposited Graphene Sheets Towards Application in Chemical Vapor Sensing

Engel, Nicholas Alexander 17 December 2018 (has links)
No description available.
177

Investigating Catalyst Composition, Doping, and Salt Treatment for Carbon Nanotube Sheets, and Methods to produce Carbon Hybrid Materials

Pujari, Anuptha 06 June 2023 (has links)
No description available.
178

Literature Circles in a Fifth Grade Classroom: A Qualitative Study Examining How the Teacher and Students used Literature Circles and the Impact They Have on Student Learning

Pambianchi, Laura Claypool 06 May 2017 (has links)
State and national standards, including the Common Core State Standards, state that students should be expected to learn to discuss and analyze texts, comprehend ideas in increasingly complex texts, and justify their thinking. Literature circles are an instructional practice suggested by many educational writers as an instructional practice that can help students meet these standards; however, research examining the impact literature circles have on students and their teacher in the classroom is needed. The purpose of this study was to investigate the implementation of literature circles in a classroom by examining how students engage in the literature circle process and the instructional practices that contribute to the level of engagement that is experienced by the students during literature. Vygotsky’s socio-cultural learning theory provides a context to understand the impact that literature circles and learning with and through others have on students. The data revealed that students engaged in the literature circle process by participating in discussions, through purposeful collaboration, and by thinking critically. The data also revealed that the level of student engagement was influenced by several practices the teacher had in place. These included (a) purposeful tasks and learning; (b) choice, (c) questioning; (d) argumentative reading and writing; and (e) role sheets. This research demonstrates the ways that using literature circles supported authentic literacy in a 5th grade classroom. Implications include instructional practices that supported engagement including purposeful tasks and learning, choice, and questioning. These instructional practices helped students learn to think critically, have evidence-based discussions, and justify their thoughts and ideas about texts. Additionally, this research has specific implications for the use of role sheets. Role sheets are frequently recommended as a practice for scaffolding student engagement, although little empirical research supports their use. Data from this study suggest that using role sheets as a conversation scaffold and as a means to train students to participate in discussion can support engagement but that discontinuing their use once students are comfortable having text-based conversations and tracking their thinking may be beneficial.
179

Stratigraphic Analysis of Areal Discontinuities of Late Wisconsinan Till Sheets Near Pymatuning Reservoir, Northwestern Pennsylvania

Adgate, Andrew W. 14 May 2012 (has links)
No description available.
180

Reconstructing and Understanding How Past Warming Affected Sea Level, Ice Sheets, And Permafrost

Creel, Roger Cameron January 2024 (has links)
Natural climate variability over the past hundreds of thousands of years provides a uniquewindow into the drivers and processes that connect different parts of our climate system. This thesis investigates interactions between Earth’s mantle, its oceans, and ice sheets over the Quaternary. The dominant process that connects these spheres is glacial isostatic adjustment (GIA), which is the deformation of Earth’s mantle (and consequently its surface, gravity field, and sea level) in response to changes in ice and ocean mass loading. This dissertation focuses on time periods during which surface temperatures were warming or warmer than today to understand how these warm intervals affected ice sheets, permafrost, and sea level. I put my results in the context of current and future warming to improve predictions of future change and compare natural to anthropogenic variability. The thesis opens with an investigation of relative (i.e., local) sea level around Norway overthe last 16 thousand years (ka). Postglacial Norwegian sea level, though dominated by postglacial rebound and associated sea-level fall, is punctuated by two periods of sea-level rise. The causes of these episodes, named the ‘Tapes’ and ‘Younger Dryas’ transgressions, remain debated despite more than a century of study. I produce the first standardized and quality-controlled compilation of Norwegian sea-level data, then employ an ensemble of empirical Bayesian hierarchical statis- tical models to estimate relative sea level along the Norwegian coastline. The resulting model enables an examination of the relative contributions of isostatic rebound and global mean sea-level (GMSL) rise to the Tapes transgression, and lays the foundation for future applications such as in- version of sea-level data for Fennoscandian ice-sheet volume and the comparison of modern rates of Norwegian sea-level rise to pre-industrial rates. Chapter Two aims to better understand sea-level and Antarctic ice-sheet variability during the Holocene, which is the last time global temperatures may have exceeded early industrial (1850 CE) values. Both the Greenland and Antarctic ice sheets likely retreated inland of their present- day extents during the Holocene, yet previous GMSL reconstructions suggest that Holocene GMSL never surpassed early industrial levels. I use relative sea-level observations, GIA predictions, and new estimates of postglacial thermosteric sea-level and mountain glacier evolution to show that the available evidence is consistent with GMSL that exceeded early industrial levels in the mid- Holocene (8-4 ka) and an Antarctic Ice Sheet that was smaller than present at some time in the last 6000 years. I also demonstrate that Antarctic ice retreat lags Antarctic temperature by 250 years, which highlights the vulnerability of the future Antarctic ice sheet to 20th and 21st century warming. Comparing our reconstruction to projections for the future indicates that GMSL rise in the next 125 years will very likely (?>0.9) be faster than at any time in the last 5000 years, and that by 2080 GMSL will more likely than not be the highest of any time in the past 115,000 years. In Chapter Three, I explore the effect of GIA on subsea permafrost. Subsea permafrost forms when sea-level rise submerges terrestrial permafrost. Subsea permafrost underlies ∼1.8 million km² of Arctic continental shelf, with thicknesses in places exceeding 700 m. Sea-level variations over glacial–interglacial cycles control subsea permafrost distribution and thickness, yet no permafrost model has accounted for GIA, which leads to deviations of local sea level from the global mean. I incorporate GIA into a pan-Arctic model of subsea permafrost over the last 400,000 years. Including GIA significantly reduces estimates of present-day subsea permafrost thickness, chiefly because of hydro-isostatic effects and deformation related to Northern Hemisphere ice sheets. Additionally, I extend the simulation 1000 years into the future for emissions scenarios outlined in the Intergovernmental Panel on Climate Change’s sixth assessment report. I find that subsea permafrost is preserved under a low-emissions scenario but mostly disappears under a high-emissions scenario. In the final chapter, I turn to the Last Interglacial (LIG, 129–116 ka), a time interval considered a partial analogue for future warming due to its elevated temperatures. Observations of oscillations in LIG local sea level, combined with an assumption that the Laurentide Ice Sheet collapsed prior to the LIG, have been used to infer Antarctic and Greenland ice-sheet melt histories as well as oscillations in LIG global mean sea level. However, evidence of a Laurentide Ice Sheet outburst flood at ∼125 ka suggests that Laurentide Ice Sheet remnants may have persisted longer into the LIG than typically thought. Here we explore the effect on LIG sea level of a Laurentide collapse that occurred during rather than prior to the LIG and a West Antarctic Ice Sheet that collapsed in the early LIG. We find that due to GIA, this asynchronous ice-sheet evolution produces a global pattern of sea-level oscillations that is similar to field observations. We demonstrate that the oscillation pattern can be produced by the combination of ongoing GIA from the penultimate deglaciation with the fingerprint of West Antarctic collapse. By showing that LIG Laurentide persistence would lead to an RSL oscillation that accords with field evidence, we highlight the need for LIG climate simulations to consider Laurentide ice-sheet dynamics and for more constraints on the LIG history of the Laurentide Ice Sheet.

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