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1
Boulard, Nina E. "Quantitative and Qualitative Measures of Activity in Seasonal Affective Disorder". Fogler Library, University of Maine, 2004. http://www.library.umaine.edu/theses/pdf/BoulardNE2004.pdf.
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Gonzalez, Shannon M. "Biological Indicators of Wetland Health: Comparing Qualitative and Quantitative Vegetation Measures with Anuran Measures". Scholar Commons, 2004. https://scholarcommons.usf.edu/etd/1049.
Testo completoAbstract (sommario):
Understanding wetland responses to human perturbations is essential to the effective management of Florida's surface and ground water resources. Southwest Florida Water Management District (SWFWMD) Rules (Chapter 40D-2.301(c) FAC) prohibit adverse environmental effects to wetlands, fish and wildlife caused by groundwater withdrawal. Numerous studies have documented the responses of biological attributes across taxa and regions to human disturbance. Biological assessment can provide information about ecological condition. Based on long-term monitoring conducted by the SWFWMD, the anthropogenic changes observed on the Starkey Wellfield are attributed to groundwater withdrawal.
Biological indicators are species, species assemblages, or communities whose presence, abundance, and condition are indicative of a particular set of environmental conditions. Monitoring early indicators of ecosystem stress may shorten response time by shifting attention to the relatively quick response of sensitive species. Species used to assess biological condition should be abundant and tractable elements of the system that provide an early, diagnosis.
Regulatory requirements within 40D-2 F.A.C. dictate an extensive analysis be conducted twice yearly on wetlands within all wellfields. This quantitative analysis provides information on the wetland plant community through the collection of eighteen categorized vegetative and physical variables. Because of the size of the area in which monitoring is required and the large number of wetlands, a rapid qualitative monitoring method was developed using vegetation and physical variables to classify wetlands into one of three categories based on their perceived health.
Wetland plants have many characteristics suited to assessments of biological condition including their diversity, taxonomy, distribution, relative immobility, well developed sampling protocols, and, for herbaceous species, their moderate sensitivity to disturbance (U.S. EPA 2002, Doherty et al. 2000). Because amphibians occupy both aquatic and terrestrial habitats in their life history, have physiological adaptations and specific microhabitat requirements, they are considered to be extremely sensitive to environmental perturbations and excellent barometers of the health of the aquatic and terrestrial habitats in which they reside (Vitt et al. 1990, Wake 1998, Blaustein 1994, Blaustein et al. 1994).
The purpose of my study was to 1) compare a qualitative method of wetland vegetation monitoring to a quantitative method, 2) document the reproductive success of anurans, and 3) compare anuran reproductive success to the vegetation monitoring results on the J. B. Starkey Wellfield (SWF). The results are published in chapters, with each chapter addressing one of the topics stated above.
The results show a rapid, qualitative measure of wetland health is useful for the determination of severely affected wetlands. The anuran reproductive success reflected similar results. The results show that wetlands can be categorized based solely on amphibian reproductive success variables. The anuran categorization, qualitative vegetative categorization, and quantitative vegetative categorization overlap on the high and low success wetlands. The low degree of overlap observed in the intermediate category could be attributed to fish predation in a wetland otherwise suited for amphibian reproduction, natural variability in the two years of anuran data collected or lag time inherent in vegetative monitoring. Strong correlative evidence suggests hydroperiod regulates anuran reproductive success on the J. B. Starkey Wellfield. The average length of inundation was correlated with the number of tadpoles captured per unit effort and the number of tadpole species captured per year (R=0.73, p<.01; R=0.70, p<.05). The average Julian date of inundation at which breeding attempts stopped and no tadpoles were observed was weeks within the published breeding season for many species. I detected a correlation between the number of species calling in each wetland and the number of tadpole species captured per year (R=0.87, p<.001) suggesting call censuses may be used at this site to estimate anuran reproductive success if enough well-timed observations are made. These findings will allow resource managers and regulators to evaluate and possibly refine land management practices, including existing monitoring methods, and water policy to meet the needs of resident amphibians at the J.B. Starkey Wellfield.
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Weir, Jade R. "Looking for Quantitative and Qualitative Measures of Teaching Interactions: A Preliminary Analysis". Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1505214/.
Testo completoAbstract (sommario):
Indicators of quality early intensive behavioral intervention (EIBI) include comprehensive interventions, adequately trained staff, high rates of effective instruction delivery, happy interactions between children and their teachers, and socially valid outcomes. When these are in place, high quality EIBI is more likely to increase progress that children with autism make during treatment. When not in place, progress is not as likely, as rapid, or as meaningful. To date, there is limited research regarding the correlation between these indicators of high-quality EIBI and the degree to which their effects are meaningful to direct consumers. The purpose of this methodological study was to compare direct, quantitative measures of teaching interactions (child initiations, teacher initiations, child affect, teacher affect) with qualitative measures (stakeholder ratings of teacher effectiveness, amount of opportunities for interaction and interest in the child) of teaching interactions to determine what sets the occasion for expert stakeholders to describe a teaching interaction as effective, quality therapy.
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Granville, Sian Rachel. "A qualitative inquiry of clinicians' relational experiences within a perinatal infant mental health service contextualised with quantitative analysis of outcome measures". Thesis, University of Essex, 2016. http://repository.essex.ac.uk/18665/.
Testo completoAbstract (sommario):
Literature highlights the perinatal period as a time of increased risk for mothers and infants, particularly those who have additional psychological and social risk factors. Enquiry reports underscore poor outcomes and service engagement for mothers from marginalized social contexts wherein relationships with services can be characterized by avoidance, distrust and silencing. Nuanced understandings of these relational processes are lacking and important to explore in the context of research supporting the therapist-parent relationship as a mechanism of therapeutic change. Within a Perinatal Infant Mental Health Service (PIMHS), this research aimed to explore clinicians’ relational experiences with the mothers and infants they work with, and their reflections on therapeutic change, and contextualize this with analysis of quantitative outcomes for mothers and infants engaged in PIMHS interventions. A qualitative inquiry using semi-structured interviews was undertaken with ten clinician participants and analysed using thematic analysis (TA). Quantitative analysis using Reliable and Clinically Significant Change calculations was conducted for six parent-infant dyads using pre and post-intervention scores on the Clinical Outcomes in Routine Evaluation-Outcome Measure (CORE-OM) and Mother Object Relationship Scale-Short Form (MORS-SF), alongside descriptive changes according to the Meaning of the Child Interview and safeguarding statuses. TA produced five main themes; ‘the overbearing wider context’, ‘professional positioning’, ‘dyadic/triadic relating’, ‘the self in the work’, and ‘connecting and expanding understanding’. Results highlight the multifaceted nature of experiences of clinicians working within the PIMHS through which wider contextual, inter-professional, dyadic/triadic, and intra-professional factors impact upon the work. Quantitative analyses of outcomes indicated a mixed profile of the extent that parents appeared to benefit from the PIMHS and demonstrated little consistency of change across measures. The discussion raises questions regarding how to measure the impact of the work, and the centrality of inter-disciplinary shared understanding in supporting families. Clinical and research implications are presented in the context of the findings and methodological limitations.
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Rodriguez, Ricardo J. "Recidivism Differences and Measures of Predictability for Federally Convicted Child Pornographers". ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/7189.
Testo completoAbstract (sommario):
There is a gap in research on the effectiveness of mandatory-minimum sentences on the recidivism rates of federal child pornography offenders, resulting in policy that may be ineffective and costly. Relevant research can further understanding of criminogenic behavior that results in the exploitation of children and aid future policy making decisions. Therefore, the purpose of this study was to better understand the relationship between federal sentencing and federal child pornographer recidivism. Central to this study is the research question of whether there exists a statistically significant difference between the likelihood of recidivism in 2 child pornographer cohorts that receive different sentences, probation or mandatory incarceration. The employed frameworks for this study were retributivism and the self-regulation model. A quantitative analysis was used to examine the recidivism rates of the 2 different cohorts as well as the predictive value of various factors related to recidivism. The sample population consisted of 70 offenders convicted of a federal child pornography offense between 2012 and 2016 from 3 states and 7 federal judicial districts. Purposive sampling was employed via publicly available secondary data. Key findings revealed that the analyzed data does not support the existence of a relationship between recidivism and the given sentence. Second, crime of conviction was the only examined factor that supported predictability for future recidivism. The implications of this study will mean evidence for potential policy modifications, alteration of an existing economically draining strategy, and the positive social change of reduced harm and exploitation of children.
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Swart, Tania. "The outcomes of bilateral cochlear implants in adult recipients". Diss., Pretoria : [s. n.], 2009. http://upetd.up.ac.za/thesis/available/etd-11302009-221632/.
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Sanner, Linda L. "A Composite Index to Measure Integration of Global Business Citizenship". ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/2944.
Testo completoAbstract (sommario):
Among the top Fortune 100 U.S. companies, 97% claim to be global business citizens, primarily based on self-evaluated qualitative criteria. The purpose of this quantitative cross-sectional survey design study was to develop a self-administered survey and apply it to calculate a composite index rating that assesses the maturity level a company has attained toward becoming a global business citizen. The theoretical framework underpinning the research was based on the theory of global business citizenship (GBC) and accompanying four-step implementation process. The GBC theory was utilized to develop the research survey consisting of 1 qualifying question and 22 Likert-type questions. The survey was administered to a qualified random sample of business executives in the United States with 172 usable responses received. These survey questions were then rationalized via exploratory factor analysis (EFA). EFA identified ten key questions with strong eigenvalues and grouped the interrelated items into three factors. Subsequently, the EFA-computed eigenvalues were used to develop a composite index formula. The key findings revealed that only three factors explained 70% of the variance and were named VALUE, IMPLEMENT, and LEARN, as proposed in the GBC theory itself. Questions related to the ANALY step of the GBC theory were not significant. Social change benefits include providing business leaders with a quantitative tool to help communicate to their stakeholders the steps they have achieved toward becoming a global business citizen.
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Mak, Hoi-yan Jennifer. "Quantitative measures of supraglottic activity". Click to view the E-thesis via HKUTO, 2002. http://sunzi.lib.hku.hk/hkuto/record/B36208401.
Testo completoAbstract (sommario):
Thesis (B.Sc)--University of Hong Kong, 2002."A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, May 10, 2002." Also available in print.
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Palotás, ÁrpadÌ Bence. "Quantitative measures of carbon microstructure". Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11141.
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Mohsen, Rabih. "Quantitative measures for code obfuscation security". Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/55180.
Testo completoAbstract (sommario):
In this thesis we establish a quantitative framework to measure and study the security of code obfuscation, an effective software protection method that defends software against malicious reverse engineering. Despite the recent positive result by Garg et al.[GGH+13] that shows the possibility of obfuscating using indistinguishability obfuscation definition, code obfuscation has two major challenges: firstly, the lack of theoretical foundation that is necessary to define and reason about code obfuscation security; secondly, it is an open problem whether there exists security metrics that measure and certify the current state-of-the-art of code obfuscation techniques. To address these challenges, we followed a research methodology that consists of the following main routes: a formal approach to build a theory that captures, defines and measures the security of code obfuscation, and an experimental approach that provides empirical evidence about the soundness and validity of the proposed theory and metrics. To this end, we propose Algorithmic Information Theory, known as Kolmogorov complexity, as a theoretical and practical model to define, study, and measure the security of code obfuscation. We introduce the notion of unintelligibility, an intuitive way to define code obfuscation, and argue that it is not sufficient to capture the security of code obfuscation. We then present a more powerful security definition that is based on the algorithmic mutual information, and show that is able to effectively capture code obfuscation security. We apply our proposed definition to prove the possibility of obtaining security in code obfuscation under reasonable assumptions. We model adversaries with deobfuscation capabilities that explicitly realise the required properties for a successful deobfuscation attack. We build a quantitative model that comprises a set of security metrics, which are derived from our proposed theory and based on lossless compression, aiming to measure the quality of code obfuscation security. We propose normalised information distance NID as a metric to measure code obfuscation resilience, and establish the relation between our security definition and the normalised information distance. We show that if the security conditions for code obfuscations are satisfied (the extreme case) then the NID tends to be close to one, which is the maximum value that can be achieved. Finally, we provide an experimental evaluation to provide empirical validation for the proposed metrics. Our results show that the proposed measures are positively correlated with the degree of obfuscation resilience to an attacker using decompilers, i.e. the percentage of the clear code that was not recovered by an attacker, which indicates a positive relationship with the obfuscation resilience factor.
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Subasi, Yuksel. "Quantitative Measures Of Observability For Stochastic Systems". Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614130/index.pdf.
Testo completoAbstract (sommario):
The observability measure based on the mutual information between the last state and the measurement sequence originally proposed by Mohler and Hwang (1988) is analyzed in detail and improved further for linear time invariant discrete-time Gaussian stochastic systems by extending the definition to the observability measure of a state sequence. By using the new observability measure it is shown that the unobservable states of the deterministic system have no effect on this measure and any observable part with no measurement uncertainty makes it infinite. Other distance measures i.e., Bhattacharyya and Hellinger distances are also investigated to be used as observability measures.
The relationships between the observability measures and the covariance matrices of Kalman filter and the state sequence conditioned on the measurement sequence are derived. Steady state characteristics of the observability measure based on the last state is examined. The observability measures of a subspace of the state space, an individual state, the modes of the system are investigated. One of the results obtained in this part is that the deterministically unobservable states may have nonzero observability measures.
The observability measures based on the mutual information are represented recursively and calculated for nonlinear stochastic systems. Then the measures are applied to a nonlinear stochastic system by using the particle filter methods. The arguments given for the LTI case are also observed for nonlinear stochastic systems. The second moment approximation deviates from the actual values when the nonlinearity in the system increases.
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Dada, Ezekiel S. "Quantitative measures of orientation in airport terminals". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq20731.pdf.
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Rakovsky, Jozef. "Qualitative-portable to quantitative-laboratory LIBS". Phd thesis, Université de Bourgogne, 2012. http://tel.archives-ouvertes.fr/tel-00825462.
Testo completoAbstract (sommario):
Laser Induced Breakdown Spectroscopy (LIBS) offers possibility for fast de- tection of sample composition without its preparation. For this reason it is attractive anywhere where the fast detection and no sample preparation are needed. As in many other branches the technical and scientific progress im- proves and spreads the possibilities of LIBS based devices and laboratory appa- ratuses. The time-resolved spectroscopy is allowed by spectrograph equipped with fast camera, broadband spectra can be acquired in single exposition by broadband spectrometers. Smaller and lighter laser sources together with com- pact spectrometers can be implemented to portable device and can be used out of laboratory. Computers offer quick data processing. The device named ChemCam installed on the NASA's next Mars rover, curiosity, is good exam- ple of high technology application in LIBS. However, there are still challenges and we hope that this work will be fruitful for anyone who is interested in the LIBS. The project of presented thesis was performed as a joint supervision project between the Department of Experimental Physics at Comenius University in Bratislava and Laboratiore Interdisciplinaire Carnot de Bourgogne at Univer- sit ́e de Bourgogne in Dijon. The aim of the project was to join experience from both laboratories, experience in laser constructions from Dijon and experience with spectroscopy from Bratislava. The both are essential for LIBS. In Bratislava the work was coordinated by prof.Pavel Veis and it was fo- cused on LIBS under the laboratory conditions. The time-resolved broadband spectrometry was used in the research. In order to achieve required spectra, the spectral response of the optical system was determined which was later used for the corrections. The research of self-absorption phenomena started in the last period with aim to use this effect, usually considered as negative, for the composition determination. In Dijon the work was supervised by Dr. Olivier Musset and directed toward development of LIBS device which could be used out of laboratory. The small 6 7 laser which was previously developed in the laboratory was implemented in the device. The development was successfully finished and testing process began in the last period of the thesis. The geological samples have been used for the testing process which was performed in deep cooperation with geologists. The first chapter comprises a brief introduction to LIBS. It is divided into some parts about laser induced plasma, laser induced breakdown and evolution of the plasma after breakdown. The section dealing with local thermodynamic equilibrium is also included. The section describes importance of LTE and the possibilities to determine this state. The second chapter is dedicated to the developed portable LIBS device. In the introduction, different type of LIBS devices are presented with their possibilities. Then the portable device developed in Dijon is described part by part with brief characteristic of developed software. The device possibilities and limits are sketched in the last section of the chapter with respect to results obtained in the testing process. The third chapter deals with capabilities of LIBS apparatus which was set up in the laboratory. The process of spectral response measurement and its results are presented and consequently used in next sections in process of plasma parameters determination. The composition of used samples are determined by using of calibration free method with aim to choose proper location in the plasma for which results are the most representative. The last chapter includes introduction to the subject of self-absorption phenomena. The simple model and basic theory are presented with suggestion how to use the phenomena in positive way. The simple experiment and its results are presented at the end of the chapter together with discussion about the possibilities and perspectives of the suggested method.
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Schmidt-Rogge, Nicola. "Quantitative und qualitative Auswertung kieferorthopädischer Behandlungen". [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962326410.
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Schmidt-Rogge, Nicola. "Quantitative und qualitative Auswertung kieferorthopädischer Behandlungen". Doctoral thesis, Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité, 2001. http://dx.doi.org/10.18452/14616.
Testo completoAbstract (sommario):
Ziel dieser Studie war es, die Behandlungsqualität und Behandlungsdauer der Kiefer- orthopädischen Abteilung einer Universitätsklinik zu bestimmen. Dazu wurden die Behandlungsmodelle vor und nach der Behandlung mit Hilfe des PAR (Peer Assess- ment Rating)-Indexes beurteilt. Weiterhin wurden mögliche Einflußgrößen auf die Behandlungsqualität und Behandlungsdauer untersucht. Die Behandlungsunterlagen von 100 fortlaufend abgeschlossenen Patienten (62 weiblich, 38 männlich) wurden retrospektiv ausgewertet. Das durchschnittliche Alter bei Behandlungsbeginn lag bei 14,9 Jahren (7,4 - 42,2 Jahre). Am häufigsten wurde die Behandlung im Alter von 9 oder 10 Jahren begonnen, 24 Patienten waren er- wachsen. Die Angle-Klasse II (71%) war am zahlreichsten vertreten, gefolgt von der Angle-Klasse I (21%) und der Klasse III (8%). 77 Patienten versäumten vereinbarte Termine, 38 Patienten mußten wegen ungenügender Mitarbeit ermahnt werden. Es kam ein breites Spektrum kieferorthopädischer Behandlungsgeräte zum Einsatz. Bei 95 Patienten wurde eine festsitzende Apparatur verwendet. Bei 52 Patienten er- folgte die Behandlung ausnahmslos mit dieser Apparatur, 33 Patienten wurden auf- einanderfolgend mit herausnehmbaren und festsitzenden Geräten behandelt und 10 Patienten kombiniert kieferorthopädisch und kieferchirurgisch. Nur 5 Patienten wur- den ausschließlich mit herausnehmbaren funktionskieferorthopädischen Geräten the- rapiert. Bei 31 Patienten wurden während der kieferorthopädischen Behandlung Zähne extrahiert. Der PAR Wert vor Behandlungsbeginn lag für die Gesamtgruppe bei durchschnittlich 23,9 Punkten. Der PAR Wert nach Behandlungsende lag bei 5,2. Die prozentuale Verbesserung betrug 75,6%. 65 Patienten hatten nach Behandlungsende einen PAR Wert ? 5 und 89 Patienten einen PAR Wert ? 10. Nur 4 Patienten erreichten einen PAR Wert von null. Die Verteilung der Patienten auf die einzelnen Verbesserungs- Kategorien lautete: greatly improved" 33 Patienten, improved" 65 Patienten, worse - no different" 2 Patienten. Auf die Behandlungsqualität hatte keiner der untersuchten Faktoren (Behandlungsmittel, Extraktion/Nichtanlage, Angle-Klasse, Mitarbeit und Geschlecht) einen signifikanten Einfluß. Die mittlere Behandlungsdauer aller Patienten betrug 39,1 Monate (8 - 85 Monate). Auf die Behandlungsdauer hatten von den untersuchten Faktoren (PAR Anfangswert, Behandlungsmittel, Extraktion/Nichtanlage, Angle-Klasse, Mitarbeit, Geschlecht und Alter bei Behandlungsbeginn) der PAR Anfangswert bei festsitzender Behandlung, die Behandlungsmittel, die Mitarbeit und das Alter bei Behandlungsbeginn einen signifikanten Einfluß. Die Behandlung mit herausnehmbaren und anschließend fest- sitzenden Apparaturen dauerte mit durchschnittlich 56,2 Monaten erwartungsgemäß am längsten. Die alleinige Behandlung mit festsitzenden Apparaturen benötigte im Schnitt 30,3 Monate, eine kieferorthopädisch-kieferchirurgische Kombinationsthera- pie beanspruchte 27,1 Monate. Extraktionen und/oder Nichtanlagen zeigten Tenden- zen zu längeren Behandlungszeiten. Jüngere Patienten benötigten eine signifikant längere Behandlungszeit.The aim of this study was to assess the treatment standards and treatment time in a university clinic. Pre-treatment and post-treatment study casts were assessed by the PAR (Peer Assessment Rating) Index. The influence of various factors upon treat- ment quality and treatment duration was analysed. The treatment records of 100 consecutively finished patients (62 females and 38 males) were evaluated retrospectively. The mean age was 14.9 years (7.4 42.2 years) at the pre-treatment stage. Most of the patients were between the ages of 9 and 10 years old, 24 patients were over the age of 18. At the start of treatment, 71 patients had an Angle Class II, 21 an Angle Class I and 8 patients an Angle Class III. There were 77 patients who failed at least once to show up for their appointments and 38 patients had negative chart entries regarding appliance wear. There was a wide range of appliance types used in this sample. The treatment involved fixed appliances for 95 patients. 52 patients were treated only with this type of appliance, 33 were treated with removable and fixed appliances successively and 5 patients were treated solely with removable functional appliances. 10 patients received combined orthodontic treatment and orthognatic surgery. 31 patients had extractions of permanent teeth as part of their treatment. The average pre- and post-treatment PAR scores were 23.9 and 5.2, repectively. The mean percentage reduction in PAR score was 75.6%. Post-treatment, 65 patients fell in the 0-5 PAR score group and 89 patients had a PAR score of 10 or less. However, only 4 patients scored 0 at the end of treatment. 33 patients have been "greatly im- proved", 65 patients "improved" and 2 ranked "worse or no different". Of all the fac- tors examined (type of therapy, extractions/agenesis, Angle Classes, compliance and gender) none showed a significant influence on post-treatment PAR scores. The mean treatment duration was 39.1 months (8 - 85 months). When treatment time was analysed, with all the factors examined (pre-treatment PAR score, type of treat- ment, extractions/agenesis, Angle Classes, compliance, gender and age at treatment start) only pre-treatment PAR score in the fixed appliance group, type of treatment, compliance and age at treatment start, were significantly related. As expected, the sequence of removable and fixed appliances required the longest treatment time (56.2 months). Fixed appliance therapy alone took 30.3 months, a combination of orthodontics and orthognatic surgery lasted for 27.1 months on average. Extractions and/or congenitally missing permanent teeth showed a tendency to higher treatment times. Inadequate compliance did significantly prolong treatment duration. Younger patients required longer treatment times.
16
Berrios, Germán, e Diez José M. Olivares. "Descriptive Psychopathology: Qualitative and quantitative issues". Pontificia Universidad Católica del Perú, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/100866.
Testo completoAbstract (sommario):
This paper deals with some of the issues that affect the understanding and functioning of descriptive psychopathology (DP). The latter remains the language of description in psychiatry and the basis for her nosological constructs. DP makes assumptions concerning the nature of its object and its underlying causes (i.e. makes use of the medical model). DP needs historical, clinical and numerical recalibration. It is suggested that in some cases, and against traditional psychometric principles, some instruments will have to be constructed that show flexibility and can be varied according to the descriptive needs presented by individual cases.En el presente artículo se discuten algunos aspectos que afectan a la comprensión y al funcionamiento de la psicopatología descriptiva (PD), la cual proporciona un lenguaje descriptivo a la psiquiatría y las bases para sus constructos nosológicos. La PD formula postulados sobre la naturaleza de su objeto de estudio y sus causas subyacentes (haciendo uso del modelo médico). Se propone que la PD necesita una recalibración histórica, clínica y numérica. En relación a esto, se sugiere que en algunos casos, en contra de los principios psicométricos tradicionales, ciertos instrumentos deberán ser construidos de un modo flexible que permita que varíen de acuerdo a las necesidades descriptivas que presenten casos individuales.
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Gloria, Antoine. "Qualitative and quantitative results in stochastic homogenization". Habilitation à diriger des recherches, Université des Sciences et Technologie de Lille - Lille I, 2012. http://tel.archives-ouvertes.fr/tel-00779306.
Testo completoAbstract (sommario):
The issue of establishing the status of nonlinear elasticity theory for rubber with respect to the point of view of polymer physics is at the heart of this manuscript. Our aim is to develop mathematical methods to describe, understand, and solve this multiscale problem. At the level of the polymer chains, rubber can be described as a network whose nodes represent the cross-links between the polymer chains. This network can be considered as the realization of some stochastic process. Given the free energy of the polymer network, we'd like to derive a continuum model as the characteristic length of the polymer chains vanishes. In mathematical terms, this process can be viewed as a hydrodynamic limit or as a discrete homogenization, depending on the nature of the free energy of the network. In view of the works by Treloar, by Flory, and by Rubinstein and Colby on polymer physics, and in view of the stochastic nature of the network, stochastic discrete homogenization seems to be the right tool for the analysis. Hence, in order to complete our program we need to understand the stochastic homogenization of discrete systems. Two features make the analysis rich and challenging from a mathematical perspective: the randomness and the nonlinearity of the problem. The achievement of this manuscript is twofold: - a complete and sharp quantitative theory for the approximation of homogenized coefficients in stochastic homogenization of discrete linear elliptic equations; - the first rigorous and global picture on the status of nonlinear elasticity theory with respect to polymer physics, which partially answers the question raised by Ball in his review paper on open problems in elasticity. Although the emphasis of this manuscript is put on discrete models for rubber, and more generally on the homogenization of discrete elliptic equations, we have also extended most of the results to the case of elliptic partial differential equations --- some of the results being even more striking in that case.
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Walter, Martin. "Qualitative und quantitative Aspekte der Buchen-Nasskernbildung /". [S.l.] : [s.n.], 1991. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=9604.
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Katoen, Joost-Pieter. "Quantitative and qualitative extensions of event structures". Enschede : University of Twente [Host], 1996. http://doc.utwente.nl/58113.
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Kimmerle, Harald [Verfasser], e Elmar [Akademischer Betreuer] Hellwig. "Quantitative und qualitative mikrobielle Analyse dentaler Aerosole". Freiburg : Universität, 2012. http://d-nb.info/1123467420/34.
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Liu, Ting. "METHODS DEVELOPMENT IN QUALITATIVE AND QUANTITATIVE PROTEOMICS". UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_diss/838.
Testo completoAbstract (sommario):
Proteomics based on liquid chromatography coupled to mass spectrometry has developed rapidly in the last decade and become a powerful tool for protein mixtures analysis. LC-MS based proteomics involves four steps, sample preparation, liquid chromatography, mass spectrometry and bioinformatics. Improvements in each step have extended its applications to new biological research areas. This dissertation mainly focuses on method developments in both qualitative and quantitative proteomics.
The first part of this dissertation focuses on qualitative analysis of T. gondii Parasitophorous Vacuole Membrane (PVM) proteins, which is very important for T. gondii’s survival. The hypothesis of this study is that proteomic approaches coupled with immunoprecipitation using polyclonal antisera as affinity reagents can successfully characterize the proteome of the T. gondii PVM. The “Three-layer Sandwich Gel Electrophoresis” (TSGE) protocol, was developed to contend with efficient salt removal and protein concentration from challenging samples. Furthermore, the TSGE coupled to 2D-LC-MS/MS was proven to be effective with the proteomic analysis of complex protein mixtures like T. gondii whole cell lysate, allowing for high-throughput protein analysis from complex samples. By using the TSGE-2D-LC-MS/MS methodology, we successfully identified 61 proteins from the PVM samples and constructed the PVM proteome.
The second part of this dissertation describes a novel method for selecting an appropriate isocyanate reagent for potential quantitative proteomics application. Our hypothesis is alteration of isocyanate structure will change fragmentation pattern and ESI property of isocyanate modified peptides. The CID property of N-terminal modified peptides by phenyl isocyanate (PIC), phenethyl isocyanate (PEIC) and pyridine-3- isocyanate (PyIC) was systematically studied using LC-ESI-MS/MS. We observed that adjustment of isocyanate structure changed both ESI and fragmentation characteristic of modified peptides. We rationalized the decrease of protonation of PIC and PEIC modified peptides results from the neutral property of the both reagents. The electron withdrawing feature of PyIC leads to significant reduction of fragments during CID. Therefore, we designed a new isocyanate reagent, 3-(isocyanatomethyl) pyridine (PyMIC). The results revealed that PyMIC modified peptides had more suitable ESI properties and generated more sequence-useful fragments compared to PIC, PyIC and even unmodified peptides. PyMIC is a more appropriate labeling reagent for quantitative proteomics applications.
22
Walker, Daniel J., Betsy Garrison e Timothy S. Killian. "Measuring Family Resilience: Quantitative versus Qualitative Approaches". Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/secfr-conf/2019/schedule/23.
Testo completoAbstract (sommario):
Family resilience is bandied about construct that is used rather imprecisely, including with its measurement. Although family resilience is now in its third wave (Henry, Morris & Harrist, 2015), findings from qualitative research and case studies are as, if not more, plentiful than those from quantitative research (e.g., author cites; Anderson, Amanor-Boadu, Stith, & Foster, 2015; Jackson, Wolven, & Aguilera, 2013). Until the development of the Walsh Family Resilience Questionnaire (WFRQ) in 2015, a family level resilience instrument based on Walsh’s theoretical framework (2003) was not readily available. Thus, the debate of qualitative versus quantitative measurement of family resilience continues. The purpose of the proposed roundtable is to continue the debate by discussing the relative merit of qualitative and quantitative approaches to the measurement of family resilience. The roundtable will conclude with a discussion about the importance of cultural competence in family resilience research (author cite; Walsh, 2015).
23
Aly, Armande. "L'Encéphale des Pleuronectiformes : étude qualitative et quantitative". Paris 7, 1989. http://www.theses.fr/1989PA077003.
Testo completoAbstract (sommario):
Observations microscopiques de l'encephale des pleuronectiformes. Mise en evidence d'une diversite de taille et de forme de l'encephale. Etude du trajet des nerfs craniens, de leur developpement chez la larve. Analyse completee par une etude quantitative avec determination du coefficient d'allometrie intra-ordinal, du coefficient intraspecifique et des indices d'encephalisation
24
Remsing, Razvan Alexandru. "Portfolio optimisation with quantitative and qualitative views". Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/4356.
Testo completoAbstract (sommario):
Includes bibliographical references.Portfolio construction with quantitative and qualitative forecasts is described through the exposition of two asset allocation models. The two models arc the Black-Litterman Asset Allocation moodel and the Qualitative Forecasts : Model developed by Herold Ulf. The models are developed theoretically and made intuitively accessible with real market data examples. Methodology is developed using the two models to transport alpha across benchmarks.
25
Chen, Xiao Jia. "Qualitative and quantitative analysis of flavonoids in Epimedium". Thesis, University of Macau, 2007. http://umaclib3.umac.mo/record=b1676776.
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26
Puschmann, Christoph Valentin. "Qualitative und quantitative Bewertung der festsitzenden kieferorthopädischen Behandlung /". München, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000253674.
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Ritter, Beate Irmgard. "Quantitative und qualitative Bewertung der herausnehmbaren kieferorthopädischen Behandlung /". München, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000254370.
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28
Scholz, Markus. "Presse und Behinderung : eine qualitative und quantitative Untersuchung". Wiesbaden VS, Verl. für Sozialwiss, 2010. http://dx.doi.org/10.1007/978-3-531-92112-9.
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29
Ballami, Nasser Salim. "Qualitative and quantitative aspect of multigated myocardial perfusion". Thesis, University of Surrey, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336521.
Testo completo
30
Preston, John Michael. "Quantitative and qualitative aspects of perceptions of bereavement". Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294092.
Testo completo
31
Atanasova, Boriana Dimitrova. "Etude psychophysique qualitative et quantitative des mélanges d'odeurs". Dijon, 2004. http://www.theses.fr/2004DIJOS014.
Testo completoAbstract (sommario):
L'objectif de ce travail de thèse est d'étudier, à des niveaux de concentrations supraliminaires et préliminaires, les interactions perceptives qualitatives et quantitatives dans des mélanges binaires d'odorant, constitués d'un composé boisé et d'un composé fruité. Aux niveaux étudiés, du point de vue quantitatif, notre étude a démontré des effets d'hyppo-addition, d'hyper-addition, de synergie et de suppression. L'étude de la qualité perçue, menée en parallèle et suivie d'une modélisation statistique des réponses individuelles, a montré l'existence d'une dominance qualitative des notes boisées sur les notes fruitées. Nous avons démontré que les interactions perceptives olfactives induites par des mélanges de composés odorants dépendent des proportions d'intensité des notes dans le mélange, mais aussi de la nature, des proportions et des niveaux d'intensité de leurs notes odorantes. De plus, certains composés non perçus isolément hors mélange peuvent avoir un impact déterminant sur la perception du mélange.
32
Pierotti, Abigail J. "Stressful workplace relationships: a qualitative and quantitative exploration". Diss., University of Iowa, 2014. https://ir.uiowa.edu/etd/1381.
Testo completoAbstract (sommario):
Stressful workplace relationships, such as abusive supervision, social undermining, and victimization, are rampant in the workplace, presenting serious challenges to individuals and organizations. This research attempts to shed new light on factors that lead to an individual experiencing a stressful relationship at work. Using a mixed methods approach, I assess a number of relationship dynamics by evaluating these relationships both from the perspective of individuals who may be the target of stressful relationship behaviors, as well as individuals who may be actors driving the stressful relationship. I first use a qualitative approach in Study 1 to get a broad sense of these relationships, including how these relationships come about, traits and behaviors of each party, coping strategies, and various outcomes. Based on this study's conclusions, and in concert with existing theories and research, I then conduct a quantitative study to specifically look at a number of factors that lead to a stressful relationship. Focusing on supervisor-subordinate dyads, Study 2 examines how supervisor behaviors are related to perceptions of subordinate arrogance, and how specific supervisor behaviors impact subordinates on both personal and professional levels. This study will also examine whether subordinate self-determination mediates the relationship between supervisor behaviors and subordinate outcomes. This research addresses a number of gaps in the literature, including: a) how perceptions of another individual motivate stress-causing behaviors, b) how perceived behaviors of one individual contribute to another (target) individual experiencing a stressful work relationship, and c) the role target self-determination plays in the relationship between actor behaviors and subordinate outcomes.
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Zhang, Yulei. "Computer Experiments with Both Quantitative and Qualitative Inputs". The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408042133.
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34
Marek, Greta I., P. Neal, A. Roache e B. Crouch. "Panel participation on 2015 Quantitative and Qualitative Research". Digital Commons @ East Tennessee State University, 2015. https://dc.etsu.edu/etsu-works/8405.
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35
Dobson, Martin J. "Quantitative and qualitative evaluation of drug-induced Parkinsonism". Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/22152.
Testo completoAbstract (sommario):
Antipsychotic medications are ubiquitous in the treatment of psychosis. However, relief from positive symptomatology comes at a price. Extrapyramidal side-effects such as drug-induced parkinsonism (DIP) are common and superficial similarities between features of parkinsonism and those of psychosis hinder efforts to calibrate dosages. The boundary between psychopathology and drug-induced disorder is a major conceptual issue in psychiatry. Instrumental assessment promises the opportunity to more accurately gauge this boundary. Three hypotheses were developed: that instrumentation has a role in the assessment of DIP, that bradykinesia is the predominant feature of DIP, and that cognitive and subjective features of parkinsonism are present in DIP. Instrumentation procedures were selected to objectively asses the three major features of parkinsonisms: bradykinesia, rigidity, and tremor. Subjective ratings of symptomatology associated with psychosis and antipsychotic mediation were taken. All the measures used were evaluated empirically relative to standard observer rating criteria and the constructs underlying the assessments were examined. The instrumental assessment techniques demonstrated moderate to high accuracy though most did not display significant advantages over clinical rating procedures. However, a role was proposed for performance measures in regular monitoring of bradykinesia. Stronger support was found for the latter two hypotheses. Results indicated that a greater degree and prevalence of abnormality relative to the control group was present in bradykinesia than the other features of parkinsonism. Empirical evidence demonstrated the presence of a cognitive deficit in behaviour associated with the presence of parkinsonism. The evidence from the study also bears on issues of drug tolerability. Support was provided for suggestions that the atypical antipsychotic, clozapine, has a uniquely low liability to induce parkinsonism.
36
Ballani, Nasser Salim. "Qualitative and quantitative SPECT of multigated myocardial perfusion". Thesis, University of Surrey, 1996. http://epubs.surrey.ac.uk/842885/.
Testo completoAbstract (sommario):
In this work, the quantitative aspect of myocardial imaging is of main concern. The following quality control measurements have been assessed: planar and SPECT resolution and sensitivity, stability and response during rotation, mechanical alignment and rotational linearity, SPECT response to a uniform source and resolution. Statistical error, i.e. noise, as an image quality indicator was also measured. The assessment of propagation of noise in the reconstructed images was compared with the Budinger equation. In addition, the target-to-non-target ratios between myocardial agents were calculated from profiles, in terms of the maximum peak to the minimum valley. Both 99Tcm-labelled myocardial perfusion agents, tetrofosmin and methoxy isobutyl isonitrile (MIBI), have similar myocardial target-to-non-target ratio and both are superior to 201Tl-chloride. The system finite resolution at different depths and scattering and attenuation effects on the quantitation accuracy of myocardial perfusion was addressed. Compensation for these factors was proposed and assessment of the dual-energy window for scatter correction was performed. The proposed modified second derivative method shows a promising correction effect. Unlike non-gated techniques, the multi--gated Single Photon Emission Computed Tomography (MG SPECT) technique provides diagnostic images less affected by the heart motion artifact. The size of the defects are more clearly displayed and more easily identified as there is less superimposition of the systolic and diastolic slices of the raw data. The end systolic (ES) and end diastolic (ED) slices being separately acquired, ventricular ejection fraction can also be calculated especially when edge enhancement is applied for easy edge delineation and volume determination. A new method is proposed to measure the myocardial wall thickness. A horizontal profile passing through the middle of the short axis slice was generated and the FWHM was taken to be the wall thickness of each wall. The second derivative of each profile was used to correct for the system effect and compared with the count-based method. Both methods have shown a good agreement. As a result, wall thickness measurement is possible and therefore an accurate quantitative analysis of the thickening is also possible in order to predict myocardial viability.
37
Achuff, Susan F. "Qualitative measures of prose recall in young and older women". CSUSB ScholarWorks, 1985. https://scholarworks.lib.csusb.edu/etd-project/221.
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38
McKnight, Patrick Everett 1966. "Calibration of psychological measures: An illustration of three quantitative methods". Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282437.
Testo completoAbstract (sommario):
The scores or metrics from psychological measures are rarely interpretable. Uninterpretable metrics result in poorly understood psychological research findings. In response to this problem, several methods are proposed that render metrics more meaningful. The methods employed are calibration procedures. Three calibration procedures are illustrated that prove to be extremely powerful in making the metrics of two related measures more understandable. Establishing the behavioral implications of the scores, computing just noticeable differences, and calibrating between measures are the three procedures described and illustrated. For the purposes of illustration, two measures of Attention Deficit Hyperactivity Disorder (ADHD) are used in the calibration procedures. These two measures are often used interchangeably without regard to their relationship with one another. The three procedures and the results of each are discussed in detail.
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Kohut, Angela R. "Qualitative and Quantitative analysis of sphingomyelin in whey protein". Connect to this title online, 2005. http://hdl.handle.net/1811/348.
Testo completoAbstract (sommario):
Thesis (Honors)--Ohio State University, 2005.Title from first page of PDF file. Document formattted into pages: contains, 20 p.; also includes graphics. Includes bibliographical references (p. 19). Available online via Ohio State University's Knowledge Bank.
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Laumann, Till. "Qualitative und quantitative Bewertung der Crashtauglichkeit von höchstfesten Stählen /". Bamberg : Meisenbach, 2010. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=020217842&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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41
Moore, Thomas. "Qualitative and quantitative aspects of user controllable lighting systems". Thesis, University of Liverpool, 2001. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250352.
Testo completo
42
Mario, Nathalie. "Etude qualitative et quantitative des hémoglobines par électrophorèse capillaire". Paris 5, 1997. http://www.theses.fr/1997PA05P632.
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43
Le, Marrec Loïc. "Investigation ultrasonore, qualitative et quantitative, d'objets à fort contraste". Aix-Marseille 2, 2004. http://theses.univ-amu.fr.lama.univ-amu.fr/2004AIX22103.pdf.
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44
Bispo, Pedro José Neves. "A software defined network controller quantitative and qualitative analysis". Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/23475.
Testo completoAbstract (sommario):
Mestrado em Engenharia Eletrónica e TelecomunicaçõesNew challenges are being raised in the networking field with the increasing number of connected devices. The growth of mobile data usage has to be considered as a requirement for the deployment of future 5G networks, especially regarding mobility scenarios. Software-Defined Networking (SDN) enables a greater degree of dynamism and simplification for the deployment of those 5G networks. SDN provides the separation of the control plane from the forwarding plane, allowing more control, adaptability and cost reduction. The growth of SDN integration in new mechanisms and network architectures led to the development of different controller solutions, with a wide variety of characteristics. Several SDN controllers exist, which originated from the different needs of operators and research teams. That resulted in the development of their own controller versions, which made comparison efforts more difficult. As such, this work provides a wider study of several open-source controllers, (namely, OpenDaylight (ODL), Open Network Operative System (ONOS), Ryu and POX), by evaluating not only their performance, but also their characteristics in a qualitative way. Taking performance as a critical issue among SDN controllers, several criteria were evaluated by benchmarking the controllers under different operational conditions, using the Cbench tool. Results are presented regarding both qualitative and quantitative comparisons between those SDN controllers under test.
Com o aumento do número de dispositivos ligados em rede, surgem novos desafios no ramo das redes. A necessidade de acompanhar o crescimento da utilização de dados móveis é um dos requisitos a ter em conta nas futuras redes 5G (5a Geração), sobretudo em cenários de mobilidade. As redes controladas por software (do inglês, Software-Defined Networking (SDN)) permitem a simplificação e dinamismo necessários à criação das referidas redes 5G. As SDNs promovem ainda a separação do plano de controlo do plano de dados, permitindo um maior controlo, adaptabilidade e redução de custos. O crescimento da tecnologia SDN levou ao desenvolvimento de diferentes controladores, com diferentes características. Existem vários controladores SDN, com origem em diferentes necessidades dos operadores e equipas de investigação. Este desenvolvimento individualizado tornou as comparações entre os controladores mais difíceis. Deste modo, o trabalho desenvolvido fornece um estudo mais abrangente de vários controladores open-source (OpenDaylight (ODL), Open Network Operative System (ONOS), Ryu and POX), avaliando não só a sua performance como as suas características de uma forma qualitativa. Considerando a performance crucial nos controladores SDN, foram considerados vários critérios na avaliação dos controladores sob diferentes circunstâncias, utilizando a ferramenta Cbench. Os resultados apresentados são relativos à comparação qualitativa e quantitativa dos controladores em teste.
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Lösche, Frank. "Investigating the moment when solutions emerge in problem solving". Thesis, University of Plymouth, 2018. http://hdl.handle.net/10026.1/12838.
Testo completoAbstract (sommario):
At some point during a creative action something clicks, suddenly the prospective problem solver just knows the solution to a problem, and a feeling of joy and relief arises. This phenomenon, called Eureka experience, insight, Aha moment, hunch, epiphany, illumination, or serendipity, has been part of human narrations for thousands of years. It is the moment of a subjective experience, a surprising, and sometimes a life-changing event. In this thesis, I narrow down this moment 1. conceptually, 2. experientially, and 3. temporally. The concept of emerging solutions has a multidisciplinary background in Cognitive Science, Arts, Design, and Engineering. Through the discussion of previous terminology and comparative reviews of historical literature, I identify sources of ambiguity surrounding this phenomenon and suggest unifying terms as the basis for interdisciplinary exploration. Tracking the experience based on qualitative data from 11 creative practitioners, I identify conflicting aspects of existing models of creative production. To bridge this theoretical and disciplinary divide between iterative design thinking and sequential models of creativity, I suggest a novel multi-layered model. Empirical support for this proposal comes from Dira, a computer-based open-ended experimental paradigm. As part of this thesis I developed the task and 40 unique sets of stimuli and response items to collect dynamic measures of the creative process and evade known problems of insightful tasks. Using Dira, I identify the moment when solutions emerge from the number and duration of mouse-interactions with the on-screen elements and the 124 participants' self-reports. I provide an argument for the multi-layered model to explain a discrepancy between the timing observed in Dira and existing sequential models. Furthermore, I suggest that Eureka moments can be assessed on more than a dichotomous scale, as the empirical data from interviews and Dira demonstrates for this rich human experience. I conclude that the research on insight benefits from an interdisciplinary approach and suggest Dira as an instrument for future studies.
46
Forsgren, Johan. "How Low Can You Go? : Quantitative Risk Measures in Commodity Markets". Thesis, Uppsala universitet, Statistiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-314088.
Testo completoAbstract (sommario):
The volatility model approach to forecasting Value at Risk is complemented with modelling of Expected Shortfalls using an extreme value approach. Using three models from the GARCH family (GARCH, EGARCH and GJR-GARCH) and assuming two conditional distributions, normal Gaussian and Student t’s distribution, to make predictions of VaR, the forecasts are used as a threshold for assigning losses to the distribution tail. The Expected Shortfalls are estimated assuming that the violations of VaR follow the Generalized Pareto distribution, and the estimates are evaluated. The results indicate that the most efficient model for making predictions of VaR is the asymmetric GJR-GARCH, and that assuming the t distribution generates conservative forecasts. In conclusion there is evidence that the commodities are characterized by asymmetry and conditional normality. Since no comparison is made, the EVT approach can not be deemed to be either superior or inferior to standard approaches to Expected Shortfall modeling, although the data intensity of the method suggest that a standard approach may be preferable.
47
Arrieta, Jafet. "Understanding Depression in Rural Chiapas: Contextualizing Quantitative Measures and Patients’ Experiences". Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:17613730.
Testo completoAbstract (sommario):
Depressive disorders are highly prevalent in primary care settings and are associated with severe physical and social impairment. However, it is a challenge for primary health care providers to identify depressive disorders early. The Patient Health Questionnaire-2 (PHQ-2) and PHQ-9 have been widely used for screening and diagnosis of depression in primary care settings.
We used a mixed methods design to assess the validity of the PHQ-9 for diagnosis of depression; to assess the sensitivity and specificity of the PHQ-2 for screening of depression; and to characterize the experience of participants living with depression in rural Spanish-speaking settings. The study was conducted in a rural community of Chiapas, Mexico. Quantitative data was collected using the PHQ-2, the PHQ-9, and the WHO Quality of Life BREF (WHOQOL-BREF) scales during an active case finding activity (n=223). Qualitative data was collected through semi-structured interviews (n=20).
The internal consistency of the PHQ-9 was good (Cronbach’s alpha >= 0.8) for the overall PHQ-9 and by subgroups. The PHQ-9 also had good construct validity: participants with a PHQ-9 diagnosis of depression had statistically significantly lower scores on the overall WHOQOL-BREF scale and each of its domains. The optimal PHQ-2 cutpoint score for screening of depression when compared with the PHQ-9 was 3 (sensitivity 80.00%, specificity 86.88%). Four main categories were derived from the qualitative analysis, including life events as triggers for depression; common feelings of sadness and desesperación, thinking too much, and somatization; a experience seeking care influenced by the local conceptualization of depressive illness, the lack of availability of health services, and physicians’ failure to recognize symptoms of depressive illness; and a experience of accompaniment perceived as therapeutic.
Evidence supports the validity of the PHQ-2 and PHQ-9 to screen and diagnose for depression in rural Spanish-speaking populations, and the association of depression with lower quality of life. The study findings highlight the role of the local context on triggering depression and influencing care-seeking behavior, and on how depressive illness is experienced by patients. Therefore, in order to improve mental health care delivery strategies, strategies and interventions should be adapted to the local context.
48
Stenhammar, Christina. "Parental Perspectives on Preschool Children’s Lifestyle : quantitative and qualitative aspects". Doctoral thesis, Uppsala universitet, Institutionen för kvinnors och barns hälsa, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-153263.
Testo completoAbstract (sommario):
Children’s lifestyle has changed significantly during the recent decades, with an increasing prevalence of obesity as one outcome. Parents are usually the most influential people in young children’s lives. The overall aim of this thesis was to investigate parental perspectives on factors associated with 3-6 year-old children’s lifestyle, regarding eating habits and physical activity. Another objective was to compare different approaches to conducting postal questionnaires in terms of response rate, time consumption and cost-efficiency. The samples in the four studies were parents of 6-year-olds (n=158), parents of 3-year-olds (n=873), parents of 4-year-olds (n=30) and parents of 3-year-olds (n=353). In the first study, a questionnaire regarding practices and attitudes towards their child’s lifestyle, perceived obstacles and desired support was used. The second study included the Swedish Parenthood Stress Questionnaire (SPSQ), the Relationship Questionnaire (RQ) and the CFQ (Child Feeding Questionnaire). Parents also reported their child’s TV-viewing habits. The child’s measured height, weight and BMI were obtained from a register, BASTA. In the third study, focus group interviews were performed. The fourth study investigated three types of consent given for participation in a survey. The results showed that parents’ attitudes towards children’s lifestyle, in general, were “healthier” than their reports of their child’s daily practices. The practices differed depending on the parents’ educational background. Significant and dose-dependant associations were found between perceived maternal stress and children’s overweight, but also underweight. Parents felt that they were mainly responsible for their preschool child’s lifestyle. However, parents described challenges that limited and obstructed them from providing their child with a healthy lifestyle, citing the need to receive professional and peer support, while also requesting support from society. Allowing respondents to actively decline participation yielded a higher response rate and proved to be the most cost-efficient method for conducting a postal questionnaire.
49
Denenholz, Laura. "Qualitative and Quantitative Method Comparison in Animal-Assisted Therapy Research". Scholarship @ Claremont, 2011. http://scholarship.claremont.edu/cmc_theses/232.
Testo completoAbstract (sommario):
While there have been many presentations and anecdotal evidence in support of AAT, quantitative empirically validated studies are very limited. Without quantitative empirical studies to support the effectiveness of AAT, it remains an unproven complement to traditional physical and psychotherapeutic practices (Kruger & Serpell,2010). The value and importance of non-empirical literature on AAT,including therapists’ observations, various author’s personal experiences, and unstructured interviews with patients, will be explored in the next section. Empirical literature on AAT, including scientific experiment and controlled research studies, will also be addressed. Finally, a conclusion providing ideas for future directions in research in this discipline will be presented.
50
García, Saldaña Johanna Denise. "A qualitative and quantitative study of some planar differential equations". Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/134677.
Testo completoAbstract (sommario):
La tesis consta de cinco capítulos y está dividida en dos partes muy diferenciadas. La primera dedicada tanto al uso del llamado Método del Balance Armónico (MBA) como a su fundamentación teórica. La segunda se ocupa del estudio cuantitativo y cualitativo de dos familias de ecuaciones diferenciales polinomiales en el plano.
El MBA proporciona una manera de obtener aproximaciones de las soluciones periódicas de ecuaciones diferenciales, así como su periodo. En los Capítulos 1 y 2 utilizamos el MBA para encontrar aproximaciones de la función de periodo de ciertas familias de ecuaciones diferenciales en el plano. La principal contribución de la tesis en este tema ha sido el estudio analítico paralelo de la función de periodo y la constatación de que las aproximaciones obtenidas vía el MBH recogen varias de las propiedades, tanto locales como globales, de esta función.
En el Capítulo 3 se demuestra que cerca de ciertas aproximaciones obtenidas usando el MBH hay soluciones periódicas reales de la ecuación diferencial estudiada. Para obtener nuestros resultados nos basamos en resultados clásicos de Urabe (1965) y Stokes (1972).
En la segunda parte del trabajo se abordan problemas cuantitativos, dentro de la llamada Teoría Cualitativa de las Ecuaciones Diferenciales. Más concretamente, en ambos capítulos se determinan analíticamente cotas inferiores y superiores de los valores de bifurcación de dos familias 1-paramétricas de ecuaciones diferenciales polinomiales. La diferencia principal entre las familias estudiadas en el Capítulo 4 y en el Capítulo 5 es que la primera es lo que se denomina una familia rotatoria, lo que implica que las bifurcaciones estén más controladas, mientras que la segunda no lo es, y entonces el problema se torna más complicado.
Para encontrar las cotas comentadas en el párrafo anterior se introduce un método para la construcción efectiva de curvas algebraicas sin contacto por el flujo de la ecuación diferencial. Estas curvas son buenas aproximaciones de las separatrices, tanto de los puntos críticos al infinito cómo de los finitos. La comprobación de que estas curvas son sin contacto pasa por el control del signo de familias 1-paramétricas de polinomios. Para resolver esta cuestión se introduce en la tesis el concepto de doble discriminante. Además, el control del número de ciclos límite de las ecuaciones diferenciales se realiza utilizando el criterio generalizado de Bendixson-Dulac. El paso final para ver que este criterio se puede aplicar pasa también por el control del signo de un determinado polinomio y de nuevo el doble discriminante tiene un papel relevante.
Los métodos desarrollados en estos dos capítulos permiten calcular aproximaciones algebraicas de las separatrices de los puntos críticos de ecuaciones diferenciales en el plano, así como determinar cotas de los valores de los parámetros que hay en las familias de ecuaciones diferenciales para que estas tengan conexiones homoclínicas o heteroclínicas.The thesis consists of five chapters and is divided into two parts. The first one is devoted to the use of the so-called Harmonic Balance Method (HBM) as well as its theoretical basis. The second one deals with the quantitative and qualitative study of two families of polynomial differential equations in the plane. The HBM provides a method to obtain approximations of periodic solutions of differential equations and their period. In Chapters 1 and 2 we use the HBM to find approximations of the period function of certain families of differential equations in the plane. The main contribution of the thesis on this issue is the parallel analytical study of the period function and the verification that the approximations obtained via the HBM capture several local and global properties of this function. In Chapter 3, it is shown that near certain approximations obtained using the HBM are actual periodic solutions of the differential equation studied. For our results we rely on classical results of Urabe (1965) and Stokes (1972). The second part of the thesis addresses some quantitative problems within the Qualitative Theory of Differential Equations. More specifically, in both chapters we analytically determined the lower and upper bounds of the bifurcation values of two one-parameter families of polynomial differential equations. The main difference between the families studied in Chapter 4 and Chapter 5, is that while the first one is a rotated family, which implies that the bifurcations are more controlled, the second one is not, and hence the problem becomes more complicated. To establish the bounds discussed in the previous paragraph we introduce a method for the effective construction of algebraic curves without contact by the flow of the differential equation. These curves are good approximations of the separatrices of critical points, both finite or at the infinity. The verification that these curves are without contact essentially amounts to controlling the sign of one-parameter family of polynomials. To solve this problem, the concept of double discriminant is introduced in the thesis. Furthermore, the control of the number of limit cycles of differential equations is performed using the generalized Bendixson-Dulac Criterion. The last step to apply this approach also involves the control of the sign of a given polynomial, and again the double discriminant plays an important role. The methods developed in these two chapters allow one to calculate algebraic approximations of the separatrices of the critical points of differential equations in the plane, and to determine bounds for the parameter values that exist in the families of differential equations in such a way that they can have homoclinic or heteroclinic connections.