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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.
141

Kan graden av empatisk förmåga predicera utbrändhet hos lärare?

Björkskog, Christofer, Oinas, Rami January 2008 (has links)
<p>Tidigare forskning har påvisat en signifikant positiv korrelation mellan empati och utbrändhet bland personal inom omvårdnadsrelaterade yrken. Utbrändhet anses överlag vara ett problem inom alla yrken. Läraryrket kan medföra omtanke om elever samt ansvarstagande och ses ibland som ett mycket stressfyllt arbete. Syftet med denna studie var att undersöka om lärares empatiska förmågor går att utpeka som relevanta faktorer vid predicering av utbrändhet. Studien uppmätte empatisk förmåga med enkätfrågor ur Pers Q och nyttjade det validerade instrumentet MBI-GS för att mäta den självupplevda graden av utbrändhet. I motsats till tidigare forskning visade denna studie på signifikanta, negativa samband mellan empatifaktorerna och graden av upplevd utbrändhet. Studien hade en kvantitativ ansats och omfattade 137 respondenter med ett lågt internt bortfall.</p>
142

Integrated circuit outlier identification by multiple parameter correlation

Sabade, Sagar Suresh 30 September 2004 (has links)
Semiconductor manufacturers must ensure that chips conform to their specifications before they are shipped to customers. This is achieved by testing various parameters of a chip to determine whether it is defective or not. Separating defective chips from fault-free ones is relatively straightforward for functional or other Boolean tests that produce a go/no-go type of result. However, making this distinction is extremely challenging for parametric tests. Owing to continuous distributions of parameters, any pass/fail threshold results in yield loss and/or test escapes. The continuous advances in process technology, increased process variations and inaccurate fault models all make this even worse. The pass/fail thresholds for such tests are usually set using prior experience or by a combination of visual inspection and engineering judgment. Many chips have parameters that exceed certain thresholds but pass Boolean tests. Owing to the imperfect nature of tests, to determine whether these chips (called "outliers") are indeed defective is nontrivial. To avoid wasted investment in packaging or further testing it is important to screen defective chips early in a test flow. Moreover, if seemingly strange behavior of outlier chips can be explained with the help of certain process parameters or by correlating additional test data, such chips can be retained in the test flow before they are proved to be fatally flawed. In this research, we investigate several methods to identify true outliers (defective chips, or chips that lead to functional failure) from apparent outliers (seemingly defective, but fault-free chips). The outlier identification methods in this research primarily rely on wafer-level spatial correlation, but also use additional test parameters. These methods are evaluated and validated using industrial test data. The potential of these methods to reduce burn-in is discussed.
143

Subsurface conductive isolation of refraction correlative magnetic signals (SCIRCMS)

Erck, Eric Stephenson 15 November 2004 (has links)
Isolation of terrestrially-observed magnetic signals by restoring their diffusive loss due to subsurface electrical conductivity sufficiently correlates these signals with those derived from the Alfven ionospheric electron movement of refraction variation. Temporary magnetic observatories were established on a conductive sedimentary basin (with a sampling interval of 5 s) and on a resistive large igneous intrusion (with a sampling interval of 10 s). Conventional modeling techniques estimate and remove the effects of the magnetometer, geomagnetic diurnal changes, whorls (solar quiet current vortices), and some bays from the acquired signals. Conventional one-dimensional skin depth modeling estimates the diffusive attenuation. The residual magnetic signal and the diffusive filter (as applied to the topography) become quantities in the linear system estimation of the geoelectric subsurface. Angular frequency domain least squares solution of the equations yields an isolated magnetic anomaly spectrum. Interpretive refinement, by selection of the zero or near zero curvature onset of either the spectrum's real or imaginary component, critically prepares the signal solution for correlation to a pseudomagnetic anomaly signal. This is an independently-derived sequence of anomalous values derived from Global Positioning System (GPS) refracted ranges. Detailed application of the Biot-Savart law provides independent anomaly signals to which the magnetic anomalies correlations show great correlation improvement by the isolation. These correlation improvements are from 2% to 83% and 9% to 91% for the sedimentary basin and from 2% to 96% and 24% to 78% for the igneous intrusion.
144

Kan graden av empatisk förmåga predicera utbrändhet hos lärare?

Björkskog, Christofer, Oinas, Rami January 2008 (has links)
Tidigare forskning har påvisat en signifikant positiv korrelation mellan empati och utbrändhet bland personal inom omvårdnadsrelaterade yrken. Utbrändhet anses överlag vara ett problem inom alla yrken. Läraryrket kan medföra omtanke om elever samt ansvarstagande och ses ibland som ett mycket stressfyllt arbete. Syftet med denna studie var att undersöka om lärares empatiska förmågor går att utpeka som relevanta faktorer vid predicering av utbrändhet. Studien uppmätte empatisk förmåga med enkätfrågor ur Pers Q och nyttjade det validerade instrumentet MBI-GS för att mäta den självupplevda graden av utbrändhet. I motsats till tidigare forskning visade denna studie på signifikanta, negativa samband mellan empatifaktorerna och graden av upplevd utbrändhet. Studien hade en kvantitativ ansats och omfattade 137 respondenter med ett lågt internt bortfall.
145

Metodundersökning av tre metoder för kvävemätning i en arktisk äng : Jämförelse mellan mätmetoderna extraktion, inkubation och jonbytesmembran (PRS-sond) / Methodological survey of three methods for measuring inorganic nitrogen in an Arctic meadow : Comparison between extraction, incubation and ion exchange membrane (PRS-probe)

Ekelund Nord, Niklas January 2012 (has links)
The purpose with this report was to compare three commonly occurring methods for measuring plant available nitrogen in soils. The methods extraction, incubation and Plant root simulator (PRS) probe - an ion exchange membrane (Western Ag Innovations, Inc., Saskatoon, Canada) method were used and comparison between these methods were conducted. A full factorial experiment were set up in northern Finland with the treatments excluding herbivores, warming and fertilization to see how the inorganic nitrogen content in the soil was effected by the treatments. Soil cores were taken and from them a subsample was incubated for 18 days and thereafter analyzed for inorganic N in laboratory. PRS- probes were in the ground for 1 month. It was a strong positive correlation between extracted and incubated samples but no correlation between the PRS- probes and extraction or incubation samples. The PRS- probes showed several significant changes in inorganic N content after the treatments where fertilization increased the tot-N and NO3 levels and warming reduced the inorganic tot-N, NH4 and NO3. These findings were not confirmed by the results of the extraction. The incubation showed negative net mineralization rates for tot- N and NH4. PRS- probes showed a slightly dominance of NO3 over NH4 while extraction showed a many times higher amount of NH4 compared to NO3. Extraction shows a strong correlation with incubation even though extraction measure an instantaneous value and incubation measure the production of inorganic nitrogen over time.
146

Understanding the electronic structure of LiFePO4 and FePO4

Hunt, Adrian 01 February 2007
This thesis has detailed the extensive analysis of the XAS and RIXS spectra of LiFePO4 and FePO4, with the primary focus on LiFePO4. One of the primary motivations for this study was to understand the electronic structure of the two compounds and, in particular, shed some light on the nature of electron correlation within the samples. Two classes of band structure calculations have come to light. One solution uses the Hubbard U parameter, and this solution exhibits a band gap of about 4 eV. Other solutions that use standard DFT electron correlation functionals yield band gaps between 0 and 1.0 eV. <p>The RIXS spectra of LiFePO4 and FePO4 were analyzed using Voigt function fitting, an uncommon practice for RIXS spectra. Each of the spectra was fit to a series of Voigt functions in an attempt to localize the peaks within the spectra. These peaks were determined to be RIXS events, and the energetic centers of these peaks were compared to a small band gap band structure calculation. The results of the RIXS analysis strongly indicate that the small gap solution is correct. This was a surprising result, given that LiFePO4 is an ionic, insulating transition metal oxide, showing all of the usual traits of a Mott-type insulator. <p>This contradiction was explained in terms of polaron formation. Polarons can severely distort the lattice, which changes the local charge density. This changes the local DOS such that the DOS probed by XAS or RIXS experiments is not necessarily in the ground state. In particular, polaron formation can reduce the band gap. Thus, the agreement between the small gap solution and experiment is false, in the sense that the physical assumptions that formed the basis of the small gap calculations do not reflect reality. Polaronic distortion was also tentatively put forward as an explanation for the discrepancy between partial fluorescence yield, total fluorescence yield, and total electron yield measurements of the XAS spectra of LiFePO4 and FePO4.
147

Second-order contributions to the non-exotic light hybrid meson correlation function (J^{PC}=1^{--}) in the chiral limit

Ratzlaff, Melissa Anne 20 September 2010
Elementary particles form hadrons through the strong interaction; one interpretation of a possible hadron bound-state is a hybrid meson which is composed of a quark-antiquark pair and gluonic content. Non-exotic hybrid mesons share spin <i>J</i>, parity <i>P</i> and charge conjugation <i>C</i> quantum numbers with quark-antiquark states while exotic hybrids do not. Aspects of particle physics, strong interactions, and quantum field theory necessary for calculating the correlation function for a hybrid meson will be reviewed. In particular, the perturbative part of the correlation function for a hybrid meson with <i>J</i><sup>PC</sup>=1<sup>--</sup> will be formulated in terms of Feynman rules and diagrams and calculated to next-to-leading order in the light (massless) quark case. Assuming the hybrid current renormalizes multiplicative, the next-to-leading order effects are found to be large, and are potentially important for future determinations of the light-quark non-exotic hybrid meson.
148

Second-order contributions to the non-exotic light hybrid meson correlation function (J^{PC}=1^{--}) in the chiral limit

Ratzlaff, Melissa Anne 20 September 2010 (has links)
Elementary particles form hadrons through the strong interaction; one interpretation of a possible hadron bound-state is a hybrid meson which is composed of a quark-antiquark pair and gluonic content. Non-exotic hybrid mesons share spin <i>J</i>, parity <i>P</i> and charge conjugation <i>C</i> quantum numbers with quark-antiquark states while exotic hybrids do not. Aspects of particle physics, strong interactions, and quantum field theory necessary for calculating the correlation function for a hybrid meson will be reviewed. In particular, the perturbative part of the correlation function for a hybrid meson with <i>J</i><sup>PC</sup>=1<sup>--</sup> will be formulated in terms of Feynman rules and diagrams and calculated to next-to-leading order in the light (massless) quark case. Assuming the hybrid current renormalizes multiplicative, the next-to-leading order effects are found to be large, and are potentially important for future determinations of the light-quark non-exotic hybrid meson.
149

Dependence of arc interrupting capability on spatial distribution of airflow velocity in air-blast flat-type quenching chamber

Yokomizu, Yasunobu, Matsumura, Toshiro, Matsuda, Akiji, Ohno, Hideyuki 01 1900 (has links)
No description available.
150

Monitoring Transport at Interfaces of Tunable Soft Surfaces

Daniels, Charlisa 06 September 2012 (has links)
The present work utilizes single molecule methods and analysis to investigate soft and hard substrates. First, the effect of charged hard surfaces on charged probes were evaluated, as the soft surfaces were built upon such a structure. Then, selected polymers were selected according to their importance in smart surface technology. The extent of interaction of the selected probes with the array of soft surfaces gives insight to the potential tunability of these surfaces. The three distinct polymers range from ubiquitous usage to advancements in current technology. The studies presented here are needed to characterize, on the nanoscale, the Coulombic interactions of these polymers.

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