• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 2075
  • 616
  • 400
  • 329
  • 283
  • 236
  • 43
  • 40
  • 36
  • 36
  • 31
  • 24
  • 24
  • 20
  • 20
  • Tagged with
  • 5007
  • 1356
  • 1350
  • 968
  • 810
  • 741
  • 610
  • 390
  • 378
  • 361
  • 354
  • 295
  • 248
  • 242
  • 228
  • 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.
301

Marriage and divorce attitude differences between young adults from maritally intact and maritally disrupted families

Tomey, Kim Arquette, 1953- January 1994 (has links)
This study examined whether young adults with a background of parental divorce differed in their attitudes toward marriage and divorce from young adults from maritally intact families. The study utilized data obtained from a survey questionnaire which provided demographic information as well as data on attitudes toward marriage and divorce. The sample population consisted of 152 University of Arizona undergraduate students ages 18-25. Data were analyzed using the Analysis of Variance Method with the results indicating that family structure (maritally disrupted versus intact) was insignificant as a predictor of young adults' attitudes toward marriage and divorce.
302

An examination of senior black, Asian and minority ethnic women and men's identity work following episodes of identity salience at work

Atewologun, Adedoyin January 2011 (has links)
This study addresses methodological critiques of ethnicity research in organisations by combining intersectionality and identity work frameworks. Additionally, it extends intersectionality beyond its traditional focus on multiple disadvantage and demonstrates contextual sensitivity to ethnicity. Taking an individual constructivist stance, I examined ethnicity and its intersection with gender and seniority through an identity work lens. The research question was: How do senior black, Asian and minority ethnic women and men make meaning of episodes that raise the salience of their intersecting identities at work? The study investigated how 24 senior black, Asian and minority ethnic (BME) women and men constructed an understanding of their multiple-identified selves in response to affirming, contradictory or ambiguous identity-heightening work experiences. Respondents kept journals about episodes that raised the salience of their intersecting identities. Then, in interviews, they described the sense they made of the episodes and their responses to them. Following a template-based analysis of 101 accounts, a typology emerged of Accommodating, Refuting, Reconciling, Affirming and Exploratory identity work modes, describing senior BME individuals’ identity construction in response to identity-heightening episodes. I introduce ‘intersectional identity work’ to illustrate how individual (e.g. cognitive effort to reconcile a paradox), relational (e.g. a sense of responsibility and affinity for subordinate minority colleagues) and contextual (e.g. visibility resulting from demographic distribution in one’s immediate environment) factors influence intersecting senior, ethnic and gender constructions at work. Integrating intersectional and identity work perspectives to examine ethnicity demonstrates the dynamic interplay of multiple identity dimensions during meaning-making, the range of modes adopted and the intensity of effort expended by senior BME women and men during personal meaning-making. This approach makes a methodological contribution to ethnicity and intersectionality research. It also makes an empirical contribution to UK ethnicity and identity work research through the suggestive model of identity work modes and rich insight into senior BME individuals’ experiences at the juxtaposition of disadvantage and privilege.
303

Impacto del Sistema de Capitalización Individual Obligatorio sobre el Ahorro de los Hogares Chilenos

Lara Escalona, Bernardo José January 2008 (has links)
No description available.
304

A comparison of individual supervision and triadic supervision.

Nguyen, Thuy Vy 08 1900 (has links)
This study was designed to measure and compare individual supervision to triadic supervision in promoting counselor effectiveness and counselor development. During individual supervision, one counselor met with one supervisor for an hour. Two models of triadic supervision were created for this study: Split Focus and Single Focus. Triadic consists of two supervisees and one supervisor meeting for one hour. During the Split Focus, 30 minutes was allocated to each counselor for supervision. During the Single Focus, the whole hour was spent supervising only one of the counselors. The next week, the whole hour was spent supervising the other counselor. Three comparison groups were employed to determine the effectiveness of the three supervision models. An instrument was used to evaluate counselor effectiveness and another instrument was used to evaluate counselor development. 47 masters-level counseling students enrolled in practicum participated in this study. The practicum met for 16 weeks. Each counselor filled out a Supervisee Levels Questionnaire-Revised at the beginning (pre-test) and at the end (post-test) of the semester. This instrument determined the counselor's developmental growth. Each counselor submitted a tape of a counseling session at the beginning (pre-tape) and at the end (post-tape) of the semester. The tape was rated on-site by the doctoral supervisor utilizing the Counselor Rating Form-Short. An objective rater also rated the submitted tapes utilizing the same instrument. The instrument determines counselor effectiveness. At the end of the study, an Analysis of Covariance determined that the three supervision models did differ in developmental growth. The Split Focus grew significantly compared to Single Focus and compared to Individual supervision. However, the Single Focus grew significantly on the factor self and other awareness compared to Individual. In terms of effectiveness, an Analysis of Covariance determined that the three supervision models did not differ significantly.
305

Integral Field Spectroscopy of the Low-mass Companion HD 984 B with the Gemini Planet Imager

Johnson-Groh, Mara, Marois, Christian, De Rosa, Robert J., Nielsen, Eric L., Rameau, Julien, Blunt, Sarah, Vargas, Jeffrey, Ammons, S. Mark, Bailey, Vanessa P., Barman, Travis S., Bulger, Joanna, Chilcote, Jeffrey K., Cotten, Tara, Doyon, René, Duchêne, Gaspard, Fitzgerald, Michael P., Follette, Kate B., Goodsell, Stephen, Graham, James R., Greenbaum, Alexandra Z., Hibon, Pascale, Hung, Li-Wei, Ingraham, Patrick, Kalas, Paul, Konopacky, Quinn M., Larkin, James E., Macintosh, Bruce, Maire, Jérôme, Marchis, Franck, Marley, Mark S., Metchev, Stanimir, Millar-Blanchaer, Maxwell A., Oppenheimer, Rebecca, Palmer, David W., Patience, Jenny, Perrin, Marshall, Poyneer, Lisa A., Pueyo, Laurent, Rajan, Abhijith, Rantakyrö, Fredrik T., Savransky, Dmitry, Schneider, Adam C., Sivaramakrishnan, Anand, Song, Inseok, Soummer, Remi, Thomas, Sandrine, Vega, David, Wallace, J. Kent, Wang, Jason J., Ward-Duong, Kimberly, Wiktorowicz, Sloane J., Wolff, Schuyler G. 31 March 2017 (has links)
We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager (GPI) as a part of the GPI Exoplanet Survey campaign. Images of HD 984 B were obtained in the J (1.12-1.3 mu m) and H (1.50-1.80 mu m) bands. Combined with archival epochs from 2012 and 2014, we fit the first orbit to the companion to find an 18 au (70-year) orbit with a 68% confidence interval between 14 and 28 au, an eccentricity of 0.18 with a 68% confidence interval between 0.05 and 0.47, and an inclination of 119 degrees with a 68% confidence interval between 114 degrees and 125 degrees. To address the considerable spectral covariance in both spectra, we present a method of splitting the spectra into low and high frequencies to analyze the spectral structure at different spatial frequencies with the proper spectral noise correlation. Using the split spectra, we compare them to known spectral types using field brown dwarf and low-mass star spectra and find a best-fit match of a field gravity M6.5 +/- 1.5 spectral type with a corresponding temperature of 2730(-180)(+120)K. Photometry of the companion yields a luminosity of log(L-bol/L-circle dot) = -2.88 +/- 0.07 dex with DUSTY models. Mass estimates, again from DUSTY models, find an age-dependent mass of 34 +/- 1 to 95 +/- 4 M-Jup. These results are consistent with previous measurements of the object.
306

Autonomía y propiedad. Una crítica a los presupuestos normativos del libre mercado

Bustamante Gamboa, Leonel Humberto January 2015 (has links)
Memoria (licenciado en ciencias jurídicas y sociales) / El objetivo de esta tesis consiste en realizar una crítica a la idea consistente en que el libre mercado sería la estructura normativa que protegería de la mejor forma posible la libertad de los individuos. Para ello, la metodología empleada en esta obra ha consistido en analizar si los presupuestos normativos sobre los cuales el libre mercado está cimentado cumplen con el fin para el cual él está supuestamente ideado. La realización de lo anterior se contiene en tres capítulos. En el primero, se revisa el concepto de “libertad negativa” y su aparente importancia para proteger la individualidad de las personas. En el segundo, se critica tanto este concepto como el fundamento que lo sostiene, cual es, el concepto de autodominio. En el contexto de esta crítica, surge la pregunta sobre si no es necesario acaso contar con un concepto de libertad entendido ahora como uno de autonomía. Por último, en el tercer capítulo se analiza si los principios de justicia que propone ROBERT NOZICK para legitimar un orden distributivo como el que se manifiesta a través del libre mercado, son suficientes para proteger un concepto de autonomía de las personas como el que él presupone, es decir, como uno que sostiene que todas las personas deben poder desarrollar sus propias concepciones sobre el bien
307

Modeling Japanese Encephalitis using interconnected networks for a hypothetical outbreak in the USA

Riad, Md Mahbubul Huq January 1900 (has links)
Master of Science / Department of Electrical and Computer Engineering / Caterina Maria Scoglio / Japanese Encephalitis (JE) is a vector-borne disease transmitted by mosquitoes and maintained in birds and pigs. An interconnected network model is proposed to examine the possible epidemiology of JE in the USA. Proposed JE model is an individual-level network model that explicitly considers the feral pig population and implicitly considers mosquitoes and birds in specific areas of Florida, North Carolina, and South Carolina. The virus transmission among feral pigs within a small geographic area (<60 sq mi areas) are modeled using two network topologies— fully connected and Erdos-Renyi networks. Connections between locations situated in different states (interstate links) are created with limited probability and based on fall and spring bird migration patterns. Simulation results obtained from the network models support the use of the Erdos-Renyi network because maximum incidence occurs during the fall migration period which is similar to the peak incidence of the closely related West Nile virus (WNV), another virus in the Japanese Encephalitis group (Flaviviridae) that is transmitted by both birds and mosquitoes. Simulation analysis suggested two important mitigation strategies: for low mosquito vectorial capacity, insecticidal spraying of infected areas reduces transmission and limits the outbreak to a single geographic area. Alternatively, in high mosquito vectorial capacity areas, birds rather than mosquitoes need to be removed/controlled.
308

PS1-14bj: A HYDROGEN-POOR SUPERLUMINOUS SUPERNOVA WITH A LONG RISE AND SLOW DECAY

Lunnan, R., Chornock, R., Berger, E., Milisavljevic, D., Jones, D. O., Rest, A., Fong, W., Fransson, C., Margutti, R., Drout, M. R., Blanchard, P. K., Challis, P., Cowperthwaite, P. S., Foley, R. J., Kirshner, R. P., Morrell, N., Riess, A. G., Roth, K. C., Scolnic, D., Smartt, S. J., Smith, K. W., Villar, V. A., Chambers, K. C., Draper, P. W., Huber, M. E., Kaiser, N., Kudritzki, R.-P., Magnier, E. A., Metcalfe, N., Waters, C. 03 November 2016 (has links)
We present photometry and spectroscopy of PS1-14bj, a hydrogen-poor superluminous supernova (SLSN) at redshift z = 0.5215 discovered in the last months of the Pan-STARRS1 Medium Deep Survey. PS1-14bj stands out because of its extremely slow evolution, with an observed rise of greater than or similar to 125 rest-frame days, and exponential decline out to similar to 250 days past peak at a measured rate of 0.01 mag day(-1), consistent with fully trapped Co-56 decay. This is the longest rise time measured in an SLSN to date, and the first SLSN to show a rise time consistent with pair-instability supernova (PISN) models. Compared to other slowly evolving SLSNe, it is spectroscopically similar to the prototype SN 2007bi at maximum light, although lower in luminosity (L-peak similar or equal to 4.6 x 10(43) erg s(-1) ) and with a flatter peak than previous events. PS1-14bj shows a number of peculiar properties, including a near-constant color temperature for > 200 days past peak, and strong emission lines from [O III] lambda 5007 and [O III] lambda 4363 with a velocity width of similar to 3400 km s(-1) in its late-time spectra. These both suggest there is a sustained source of heating over very long timescales, and are incompatible with a simple Ni-56-powered/PISN interpretation. A modified magnetar model including emission leakage at late times can reproduce the light curve, in which case the blue continuum and [O III] features are interpreted as material heated and ionized by the inner pulsar wind nebula becoming visible at late times. Alternatively, the late-time heating could be due to interaction with a shell of H-poor circumstellar material.
309

Intergeneration transmission of trauma and its effects on the second generation's mental health as moderated by parental communication style

Shamtobi, Sanam Ramzi 10 September 2016 (has links)
<p> The current study examined the construct of intergenerational transmission of trauma (ITT) in relation to its effect on depressed, anxious, and stress symptoms in a sample of participants who could identify a parent as having survived notable trauma. Parental communication style was examined as the moderating factor. A total of 89 participants comprised the current sample, with a majority of the sample representing individuals who identified as highly educated, female, and born in the United States of America. Five assessment tools were utilized, including the Modified Secondary Trauma Questionnaire (MSTQ; Motta, Hafeez, Sciancalepore, &amp; Diaz, 2001), The Depression and Anxiety Stress Scale (DASS; Lovibond, &amp; Lovibond, 1995), The Family Communication Scale (FCS) from The Family Adaptability and Cohesion Evaluation Scale (FACES-IV; Olson, 2011) and a demographic questionnaire. The most frequent traumas in the sample included loss of parent or other significant family member, physical/sexual/verbal abuse and immigration related trauma. Multiple regression statistics were used to analyze the data, and it was found that MSTQ scores contributed significantly toward the variance in levels of stress, anxiety, and depression. Parent communication style did not moderate these associations. Clinical implications, study limitations and suggestions for future research are discussed.</p>
310

ASYMMETRIES IN SN 2014J NEAR MAXIMUM LIGHT REVEALED THROUGH SPECTROPOLARIMETRY

Porter, Amber L., Leising, Mark D., Williams, G. Grant, Milne, Peter, Smith, Paul, Smith, Nathan, Bilinski, Christopher, Hoffman, Jennifer L., Huk, Leah, Leonard, Douglas C. 24 August 2016 (has links)
We present spectropolarimetric observations of the nearby Type Ia supernova SN 2014J in M82 over six epochs: +0, +7, +23, +51, +77, +109, and +111 days with respect to B-band maximum. The strong continuum polarization, which is constant with time, shows a wavelength dependence unlike that produced by linear dichroism in Milky Way dust. The observed polarization may be due entirely to interstellar dust or include a circumstellar scattering component. We find that the polarization angle aligns with the magnetic field of the host galaxy, arguing for an interstellar origin. Additionally, we confirm a peak in polarization at short wavelengths that would imply R-V < 2 along the light of sight, in agreement with earlier polarization measurements. For illustrative purposes, we include a two-component fit to the continuum polarization of our +51-day epoch that combines a circumstellar scattering component with interstellar dust where scattering can account for over half of the polarization at 4000 angstrom. Upon removal of the interstellar polarization signal, SN 2014J exhibits very low levels of continuum polarization. Asymmetries in the distribution of elements within the ejecta are visible through moderate levels of time-variable polarization in accordance with the Si II lambda 6355 absorption line. At maximum light, the line polarization reaches similar to 0.6% and decreases to similar to 0.4% 1 week later. This feature also forms a loop on theqRSP-uRSP plane, illustrating that the ion does not have an axisymmetric distribution. The observed polarization properties suggest that the explosion geometry of SN 2014J is generally spheroidal with a clumpy distribution of silicon.

Page generated in 0.0568 seconds