• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 651
  • 318
  • 249
  • 43
  • 41
  • 30
  • 25
  • 24
  • 20
  • 16
  • 14
  • 7
  • 6
  • 5
  • 3
  • Tagged with
  • 1625
  • 234
  • 223
  • 185
  • 181
  • 176
  • 174
  • 173
  • 162
  • 142
  • 134
  • 130
  • 130
  • 118
  • 117
  • 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.
261

Pesticide residues in groundwater and soil of a prairie province in Canada

Sapkota, Kamala 04 April 2017 (has links)
The study was conducted to monitor pesticide residues in groundwater of two agriculturally intensive regions of Alberta, to determine the occurrence of pesticide residues in soil and groundwater of an experimental plot in southern Alberta, and to investigate the influence of land management factors and soil depth on pesticide residues in soil. A total of 440 groundwater samples were collected in three years (2013-2015) and analyzed for the presence of 142 pesticides using Liquid-liquid Extraction (LLE) in combination with Gas Chromatography- Mass Selective Detector (GC-MSD) and Gas Chromatography - Tandem Mass Spectrometry (GC-MS/MS). Ten herbicides, seven insecticides, and six fungicides were detected. Herbicides 2,4-D, MCPA, and clopyralid were the most frequently detected, and the only pesticides consistently detected every year in both regions. Pesticides were detected more frequently in summer and fall compared to spring. 4.5% of the samples were contaminated with more than one pesticides. No pesticides exceeded the Guidelines for Canadian Drinking Water Quality. Similarly, a total of 213 groundwater samples (December 2014-November 2015) and 61 soil samples (in December 2014) in duplicates were analysed from the experimental plots in Lethbridge. Soil samples were collected at various depths (0-75 cm) and analyzed for the presence of 130 pesticides. A linear mixed effect model was fitted to determine the effect of soil depth, cropping systems and manure amendments on pesticide concentration in soil. In groundwater, bentazone, 2,4-D, and MCPA occurred most frequently and pesticide detection frequency varied seasonally with greater detections in July and September compared to other months. 37 different pesticide compounds were detected, and DDT isomers, 2,4-D, difenoconazole, MCPA and trans-heptachlor epoxide accounted for 85% of all detections. p,p’-DDE, 2,4-D, p,p-DDT, difenoconazole and MCPA occurred throughout the soil column and all of these except p,p-DDT were detected in underlying groundwater. Bentazone was found in groundwater throughout the year but not in soil. A greater number and higher concentrations of pesticides were found in soil. However, not all of them leached to groundwater. Soil depth and cropping system were significantly associated with total pesticide and total DDT concentration in the soil. Manure amendments had no affect pesticide concentrations. / May 2017
262

Knowledge and Perceived Ambiguity of Physical Activity Recommendations and Physical Activity in Men and Women in the United States

Kiken, Laura G. 01 January 2006 (has links)
Background: The majority of Americans - especially women - do not meet physical activity recommendations. Having physical activity goals has been associated with physical activity participation, and physical activity recommendations set by public health experts can be viewed as externally set goals. However, past research has shown that goals that are specific rather than ambiguous are more likely to be achieved, and variations in recommendations over time and across sources may have created perceived goal ambiguity.Objectives: This study aimed to (1) examine the extent of physical activity recommendation knowledge among adults in the United States, (2) quantify perceptions of the ambiguity of these recommendations, (3) determine whether knowledge of physical activity recommendations is associated with physical activity level, and (4) investigate whether perceived ambiguity of recommendations moderates the relationship between recommendation knowledge and activity. An additional objective was to explore demographic differences in any associations detected.Methods: SUDAAN was used to weight data from the 2005 Health Information National Trends Survey (HINTS) (N=5,586) to represent the U.S. population. Descriptive statistics were calculated, and logistic regression was used to determine crude and adjusted odds ratios.Results: An estimated 31% of Americans had accurate knowledge of recommendations, and 35% reported engaging in physical activity at the recommended level. An estimated 75% perceived the recommendations as ambiguous. The odds of reporting accurate knowledge of recommendations were significantly higher among women than among men (OR 1.53,95% CI 1.22-1.93), but accurate knowledge of recommendations was associated with physical activity at the recommended level only among men (OR 1.67,95% CI 1.06-2.64). Perceived ambiguity did not moderate the association between knowledge and activity level in any analysis.Conclusions: These findings support disseminating updated physical activity recommendations as indicated by the scientific evidence base. Future research should explore: (1) how to boost knowledge of recommendations, particularly in men, (2) factors that would enable women to act on such knowledge, and (3) gender differences in other determinants of physical activity.
263

Lesbian, gay, bisexual and transgender aging adults educational guidelines to create community of care within long-term care organizations

Quigley, Jake January 1900 (has links)
Master of Science / Department of Landscape Architecture/Regional and Community Planning / Stephanie Rolley / More than 5% of the 65 and older population utilize nursing homes, congregate care, assisted living, and board-and-care homes, with about 4.2% of these individuals occupying nursing homes at any given time (Administration on Aging, 2008). The rate of nursing home use generally increases with age and studies have shown that by the year 2030, the number of lesbian, gay, bisexual and transgender (LGBT) adults over the age of 65 is expected to be nearly 3 million (SAGE, 2010). With this overall increase in potential resident populations, those aging adults who identify as LGBT are faced with additional unique challenges commonly not encountered by their heterosexual counterparts. The majority of LGBT elders fear they will experience discrimination in long-term care organizations, with more than half maintaining that staff or even other residents will abuse or neglect them (Knochel, et al., 2010). Unrevised long-term care organizational rules combined with prejudice and hostile treatment from staff members can create unwelcoming environments for LGBT elders who are generally unable to advocate for themselves. Challenges that aging LGBT adults face in long-term care settings will be reviewed and discussed in this report. In addition, this report will provide educational guidelines to assist long-term care organizations in developing an educational model targeted at addressing LGBT elders’ concerns. When staff within a long-term care community lack proper training on and understanding of LGBT concerns, it can negatively affect the quality of care provided to these members. As such, the educational guidelines will encourage an educational model incorporating cultural competency training among the long-term care staff and organizational leadership, and will utilize community development principles to ensure inclusiveness and increase social capital.
264

Blir du slagen? : Hur personalen inom barn- och ungdomspsykiatrin beskriver att de arbetar för att upptäcka barn som utsätts för våld / Are you being abused? : How employees of child and adolescent psychiatry describe their work to discover child abuse

Andersberg, Evelina, Larsson, Johanna January 2017 (has links)
Att barn blir utsatta för våld är i dagens samhälle inte ovanligt. Våld är ett komplicerat ämne att prata om med barn då barnen behöver lita på den som frågar, inte känna sig trängda och samtidigt åsidosätta sin lojalitet till en nära person för att våga berätta. Syftet med vår studie har varit att utifrån en triangulering, en kombination av kvalitativ och kvantitativ metod, undersöka hur yrkesverksamma inom barn- och ungdomspsykiatrin arbetar i kontakten med barn för att upptäcka om barnet utsätts för våld i hemmet och att uppmärksamma om eventuellt glapp finns mellan riktlinjer och verklighet. Undersökningen gjordes genom en enkät med 23 svarande som redovisas genom en deskriptiv analys av de kvantitativa frågorna samt en innehållsanalys av de kvalitativa frågorna. Resultatet visar att yrkesverksamma inom barn- och ungdomspsykiatrin idag frågar barn om de har utsatts för någon typ av våld när misstanke uppstår snarare än på rutin. Arbetsplatsens riktlinjer är bekanta för de flesta svarande och de vet hur de ska gå vidare om de får reda på att ett barn utsatts för våld. De yrkesverksammas upplevelser kring att fråga skiljer sig mellan olika typerna av våld och det är svårare att närma sig ämnet sexuellt våld än att prata om fysiskt våld. Trots olika svar på våra frågor kring att fråga om det förekommer våld i hemmet finns det ett genomgående tema: Det handlar om att fråga på ett sådant sätt att ingen känner sig trängd eller kränkt. / That children are exposed to violence is nothing unusual in the society of today. Violence is a complicated topic to talk about with children because the child has to trust the person who asks, not feel repressed and also, to tell someone about what has happened means to override their loyalty to a person close to them. The aim of our study has been, through a triangulation, a combination of qualitative and quantitative method, to investigate how the child and adolescent psychiatry work in the contact with children to discover if there is violence in the family, and whether they have knowledge of the workplace guidelines in the subject. The survey was conducted through a questionnaire with 23 respondents reported by a descriptive analysis of the quantitative material and a content analysis of the qualitative. The result shows that professionals in child and adolescent psychiatry today ask children if they have suffered any kind of violence when the suspicion arises rather than routine. Workplace guidelines are familiar to most respondents, and they know how they should proceed if they find out that a child is exposed to violence. The professionals' experiences on the issue differ between different types of violence and it is difficult to approach the topic of sexual violence than it is to talk about physical violence. Despite the various answers to our questions around the topic to ask if there is violence in the family, there is a consistent theme: It's all about to question in such a way that no one feels cornered or offended.
265

Praktické aspekty vysokosacharidové diety ve vrcholovém sportu / Practical aspects of high-carbohydrate dieting in top sport

Jurková, Kateřina January 2019 (has links)
Topic: Practical aspects of high-carbohydrate dieting in top sport The topic of this thesis is sports nutrition. After a comprehensive summary of current scientific and generally accepted guidelines, the practical part is based on an example of the current state of sports nutrition in one concrete men's basketball team. Subsequently, the practical part combines the knowledge of theory and results of diet analysis of the current nutritional status in the team. The aim of the analytical part of the thesis was to find out the individual and subsequently average data of the monitored file through the registration of weekly eating diaries, both in terms of macro and micronutrients. These data were statistically processed using the program Sportvital-Nutrition (http://www.bonfit.cz/), whose database contains the most comperhensive information about the composition of individual foods and meals, allowing analysis of up to 30 nutritional parameters. The main aim of the application part of the thesis was to design and calculate a sample menu for seven whole days for top athletes based on predetermined and defined criteria based on theoretical background and analysis of collected eating diaries. These criteria were to follow the principles of healthy nutrition, i.e. primarily the variety, regularity and...
266

An examination of the implementation of an ecological sanitation project as an instrument of the Environmental Sanitation Policy of Ghana: the case of Kumasi Metropolis

Ekuful, Joyce January 2010 (has links)
Magister Administrationis - MAdmin / The generation of large volumes of solid and liquid wastes in urban and periurban areas of Ghana is a big problem for the people and government of Ghana. It contributes to the outbreak of many diseases in the country such as malaria, diarrhoea and typhoid fever. In managing the situation, a new concept called ecological sanitation (ecosan), which focuses on reuse of waste, has been introduced in the country. The objectives of the thesis were to criticise the environmental sanitation policy by analysing its content in relation to policy implementation arrangements, to discuss programmes and projects identified under the policy, to critically examine the implementation of an ecosan project as a way of achieving the goal and objectives by outlining its implementation processes, prospects and challenges, and to make appropriate recommendations. The analysis and discussion of the thesis were based on both primary and secondary data. The primary data, on one hand, were collected on the prospects and challenges that exist in the implementation of ecosan projects from Kumasi metropolis. The secondary data, on the other hand, were from books, journals and websites. From the research analysis, it emerged that the policy allows the implementation of many sanitation projects including ecosan. Secondly, stakeholders see ecosanto be a good approach to reduce waste generation in the country. However, the main challenges that exist in promoting the concept are inadequate financial support, unavailability of implementation guidelines and lack of knowledge about concept details. It is therefore argued that financial support, implementation guidelines and awareness-creation activities should be available in the implementation of ecosan in the metropolis. Government, private organisations, companies and individuals should each contribute their quota in the support and processes. / South Africa
267

Tradition and transformation : a critique of English setwork selection (2009-2011).

Silverthorne, Rosemary Ann 15 March 2010 (has links)
This Research Report critiques the English Home Language Literature setwork selection for the period 2009-2011 in terms of the National Curriculum Statement for English Home Language for Grades 10- 12 to establish whether there is consonance between policy and practice in this section of the syllabus and to determine whether the new national syllabus offers a traditional or a transformational approach to the subject. In order to do this, the National Curriculum Statement is analysed in terms of the principles and outcomes which it intends to be actualised in the study of English and selects those that seem applicable to literature studies. Questions are formulated encapsulating these principles and used as the tools to critique the new national literature syllabus both as regards its individual constituent parts and as regards the syllabus as a whole. A brief comparison between the current prescribed literature selection and setworks set from 1942 to the present day establishes whether the new syllabus has departed from old syllabus designs, whether it acknowledges the new target group of pupils in multiracial English Home Language classrooms by offering a revised, wider and more inclusive selection of novels, dramas, poems and other genres such as short stories, or whether it remains traditionally Anglocentric in conception. The conclusions reached are that although the setworks conform to the letter of the requirements set down in the NCS, the underlying spirit of transformation is not realised. The inclusion of some poets from Africa and South Africa is merely content addition to a Eurocentric core curriculum, a form of tokenism which does not reorientate the syllabus significantly or move it away from its traditional trajectory. The report suggests that literature of merit from both Africa and South Africa be included in every part of the syllabus so that it reflects in some degree the contributions that the continent makes to English literature, in this way including in its scope the interests and identities of the wide range of learners studying English Home Language in the South African context.
268

Evaluating Machine Learning Intrusion Detection System classifiers : Using a transparent experiment approach

Augustsson, Christian, Egeberg Jacobson, Pontus, Scherqvist, Erik January 2019 (has links)
There have been many studies performing experiments that showcase the potential of machine learning solutions for intrusion detection, but their experimental approaches are non-transparent and vague, making it difficult to replicate their trained methods and results. In this thesis we exemplify a healthier experimental methodology. A survey was performed to investigate evaluation metrics. Three experiments implementing and benchmarking machine learning classifiers, using different optimization techniques, were performed to set up a frame of reference for future work, as well as signify the importance of using descriptive metrics and disclosing implementation. We found a set of metrics that more accurately describes the models, and we found guidelines that we would like future researchers to fulfill in order to make their work more comprehensible. For future work we would like to see more discussion regarding metrics, and a new dataset that is more generalizable.
269

Towards Trustworthy AI : A proposed set of design guidelines for understandable, trustworthy and actionable AI

Uga, Brenda January 2019 (has links)
Artificial intelligence is used today in both everyday applications and specialised expert systems. In situations where relying on the output of the AI brings about the risk of negative consequences, it becomes important to understand why the AI system has produced its output. Previous research in human-computer trust has identified trust antecedents that contribute to formation of trust in an AI artifact, understanding of the system being one of them. In the context of Pipedrive, a sales management system, this thesis investigates how can AI predictions be designed as understandable and trustworthy, and by extension which explanatory aspects provide guidance towards actions to take, and which presentation formats support for- mation of trust. Using a research-through design approach, multiple designs for displaying AI predictions are explored for Pipedrive, leading to a proposal for a set of design guidelines that support understandability, trustworthiness and actionability of AI. Both the designs and the guidelines have been iteratively developed in collaboration with users and design practitioners. / Artificiell intelligens används idag både i vardagliga applikationer och expertsystem. I situationer då förtroendet för utdata från AI innebär en risk för negativa konsekvenser blir det viktigt att förstå varför AI-systemet har producerat dess utdata. Tidigare forskning inom människa-datorförtroende har identifierat förtroendeföregångare som bidrar till att skapa förtroende för en AI-artefakt, varav förståelse för systemet är en av dem. Inom ramen för Pipedrive, ett säljhanteringssystem, utreder denna avhandling hur AI-förut-sägelser kan designas på ett förståeligt och pålitligt sätt, och i förlängningen vilka förklarande aspekter som kan ge vägledning gällande de åtgärder som ska vidtas, samt vilka presentationsformat som stödjer skapande av förtroende. Med hjälp av en metod för forskning genom design undersöks flera utföranden för att visa AI-förutsägelser för Pipedrive, vilket leder till ett förslag till en uppsättning riktlinjer för design som stödjer förståelse, pålitlighet och funktionsduglighet. Både design och riktlinjer har utvecklats iterativt i samarbete med användare och designutövare.
270

"Conhecimento, práticas e fontes de informação de enfermeiros de um hospital sobre a prevenção e tratamento da úlcera de pressão" / "Nurses´ knowledge, practice and sources of information related to pressure ulcer prevention and management"

Rangel, Elaine Maria Leite 30 April 2004 (has links)
O propósito desta pesquisa descritiva foi examinar o conhecimento e a prática de enfermeiros referente à prevenção e tratamento da úlcera de pressão e as fontes utilizadas para obter informação. Após a aprovação pelo Comitê de Ética em Pesquisa, foi solicitado que os enfermeiros de um hospital geral do interior paulista fornecessem os dados demográficos, completassem o teste de conhecimento sobre úlcera de pressão e que identificassem a freqüência de ocorrência de algumas práticas nas situações clínicas referentes à prevenção, ao tratamento e à fonte de informação utilizada. Dos 25 participantes, 96% eram mulheres entre 30 e 40 anos de idade, tendo terminado a graduação em 5 anos ou menos. Somente 8% tinham feito algum curso de especialização. Dos 46 ítens do teste, os enfermeiros responderam corretamente entre 31,1% e 89,1%. O escore mais baixo foi 18 e o mais alto foi 41. O escore médio foi 32,48 (DP 4,7). Nove enfermeiros (36%) responderam corretamente entre 51% a 69,9% dos ítens e 15 (60%) responderam corretamente mais de 70% dos ítens. Considerando os ítens relacionados a avaliação da úlcera, os escores mais baixos foram relacionados a descrição do descolamento e a presença do tecido desvitalizado no leito da ferida. Em relação à classificação da úlcera, os escores mais baixos foram relacionados a descrição do estágio I e II. Os ítens do conhecimento sobre a prevenção que obtiveram escores mais baixos foram em relação ao significado da escala de Braden e recomendações quanto a técnicas de posicionamento. Considerando a prática dos enfermeiros, 56% relataram que sempre fazem a avaliação do risco do paciente na admissão, e que documentam as medidas preventivas no prontuário do paciente (76%). Entretanto, 50% dos enfermeiros mencionaram realizar práticas inadequadas como massagem nas regiões de proeminências ósseas. Na opinião dos enfermeiros, o curativo da ferida é sempre feito pelo auxiliar de enfermagem (83.3%); entretanto, a decisão sobre o tratamento é sempre realizada pelo enfermeiro (79.2%), e às vezes pelo médico (66.7%). As práticas do tratamento da ferida mostraram uma grande variação. Alguns enfermeiros ainda usam luvas com água para proteger os calcâneos dos pacientes e às vezes usam almofadas com orifício no meio para tratar úlceras de estágio I e II. Em relação às fontes de nformações para manter-se atualizados 12,24% mencionaram que sempre participam de cursos, discussões científicas ou eventos e grupos de estudo, e 75,5% reportaram que participam às vezes. Alguns (12%) enfermeiros reportaram que sempre assinam revistas científicas ou lêem artigos científicos ou usam a biblioteca, enquanto 66,21% mencionaram que algumas vezes fazem estas atividades. Enquanto 58,3% dos enfermeiros mencionaram sempre ter acesso à Internet, somente um (4%) citou um site específico sobre úlcera de pressão. A maior parte dos enfermeiros (68%) sempre procuram outros enfermeiros da mesma instituição como fonte de informação, enquanto médicos e enfermeiros pesquisadores são consultados com menor freqüência. Os enfermeiros que referiram sempre participar em atividades de educação continuada oferecidas pela instituição(73,7%) obtiveram escores mais elevados no teste. A pesquisa identificou que, apesar dos enfermeiros apresentarem um bom nível de conhecimento no teste, algumas áreas da prevenção e tratamento da úlcera precisam de investimentos para facilitar a implementação das recomendações baseadas em pesquisa ou outras evidências para que a prática clínica seja aperfeiçoada. / The purpose of this descriptive research was to examine a group of nurses’ knowledge concerning pressure ulcers’ prevention and management, and the sources used to get information for nursing care. Twenty-five nurses, working in a middle size general hospital in an inner city of Sao Paulo state, were asked to provide demographic information, to complete the Pressure Ulcer Knowledge Test as well to identify the frequency of some practice at clinical setting related to pressure ulcer prevention and management, and their source of information. Most nurses were female (96%), in their 30’s (56%), and had finished their BSN in 5 years or less (48%). Only 8% had any specialty education after graduating from university. Of the 46 items, nurses correctly answered between 34,1% to 89,1% . The lowest score was 18 and the highest was 41. The average score was 32,48 (SD 4,7). Nine nurses (36%) correctly answered 51% to 69,9% of the items; and 15 (60%) answered correctly more than 70% of the items. Considering the items related to pressure ulcer evaluation, lower scores were obtained related to description of undermining and the presence of slough in wound bed. Related to ulcer staging, lower scores were obtained related to description of stage II and III. Knowledge about pressure ulcer prevention was lower related to meaning of Braden scale, positioning techniques while sitting or use of the 30 degree sidelying . Regarding ulcer management, nurses reported that they always (56%) performed patient’s risk evaluation at admission and document prevention measures on patients’ records (76%). However, 50% of nurses mentioned inadequate practices as giving massages on bone prominence; 12.5% reported always giving massages, 37.5% sometimes. In the nurses’ opinion, wound care is mostly performed by nurses’ aides (83.3%); however, the decision of treatment is always made by nurses (79.2%), and sometimes by the physician (66.7%). Wound care practices showed a great variability. Some nurses still use water filled gloves to protect patients’ heels and sometimes use ring cushions to treat stage I and stage II ulcers. Related to sources of information to keep updated knowledge, 12,24% of nurses mentioned that always participated of courses, scientific discussions or meetings and study groups and 75,5 % reported that participated sometimes. Some nurses (12 %) reported that always subscribes a scientific journal or reads scientific articles or uses the library, while 66,21% mentioned that sometimes do those activities. While 58,3% of nurses always had access to the Internet, only one (4%) mentioned a specific site about pressure ulcers. Most of nurses (68%) always seek nurses from the same institution as source of information and physicians and nurse researcher are seeing less frequently. Nurses that refered to always participating in activities of continuing education offered by the institution (73,7%), obtained better scores on the knowledge test. The research has shown that although nurses have a good level of knowledge in some areas of pressure ulcer prevention, more needs to be done to facilitate the implementation of research or evidenced based recommendations in this institution in order to enhance clinical practice.

Page generated in 0.0753 seconds