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2.
Water Res ; 171: 115459, 2020 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-31935641

RESUMEN

Changes in the characteristics of dissolved organic matter (DOM: the dissolved fraction of natural organic matter) during a series of wastewater treatment plant (WWTP) processes were investigated by using a combination of molecular size analysis and excitation emission matrix (EEM) spectroscopy coupled with parallel factor analysis. The characteristics of DOM were compared following aerobic, anoxic, and anaerobic treatments. Three peaks at about 100,000 Da (high-molecular-size DOM, Peak 1) and about 900-1,100 Da (intermediate-molecular-size DOM, Peak 2; low-molecular-size DOM, Peak 3 as the shoulder of Peak 2) were observed in the distribution of total organic carbon molecular sizes in the influent of the WWTPs. In this study, five fluorescent components (C1 to C5) were identified in the EEM spectra. Molecular size analysis and molecular size fractionation revealed that the C3 (humic-like) and C5 (specific to sewage) fluorophores had intermediate or low molecular sizes. Comparison of the changes of the concentrations of dissolved organic carbon in each reaction tank and investigation of the removal selectivity of each treatment (aerobic, anaerobic, and anoxic) suggested that the heterogenous compounds present in DOM of the influent were homogenized into intermediate-molecular-size DOM with high hydrophobicity and aromaticity, or into C4 fluorophores (DOM-X), during anaerobic or anoxic treatment. DOM-X was able to be transformed or removed by aerobic treatment. The results suggested that introduction of aerobic treatment at the appropriate stage of wastewater treatment or inclusion of physical or chemical treatment should be an effective way to optimize DOM removal.


Asunto(s)
Compuestos Orgánicos , Aguas Residuales , Anaerobiosis , Análisis Factorial , Sustancias Húmicas , Aguas del Alcantarillado , Espectrometría de Fluorescencia
3.
Oral Dis ; 26(1): 96-110, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31650646

RESUMEN

OBJECTIVES: To validate the Hospital Anxiety and Depression Scale (HADS) and the 10-item Perceived Stress Scale (PSS-10) for use in patients with oral lichen planus (OLP) and to provide cross-sectional analysis of anxiety, depressive and distress symptoms in patients with OLP. METHODS: Validity and reliability of both instruments were assessed in 260 participants with OLP in one tertiary oral medicine centre through confirmatory factor analysis and calculation of reliability coefficients. Prevalence, clinical and demographic predictors of the presence of psychological symptoms in OLP were calculated and identified using multivariated logistic regression. RESULTS: Factor analysis results demonstrated that a bifactor model described the underlying structure of both scales better than other models. Values of omega indicated adequate reliability of total HADS and PSS-10 score while low coefficient omega hierarchical values limit clinical applicability of their subscale scores. The prevalence of anxiety, depressive and distress symptoms in OLP was 39.23%, 20.77% and 27.69%, respectively. Pain intensity, disease comorbidities, age, smoking and alcohol consumption were found to be independent predictors of the presence of psychological symptoms in OLP. CONCLUSION: The HADS and PSS-10 are appropriate to use as general measures of psychological distress and perceived stress in patients with OLP.


Asunto(s)
Liquen Plano Oral/psicología , Pruebas Psicológicas , Estrés Psicológico/diagnóstico , Adulto , Anciano , Anciano de 80 o más Años , Ansiedad/diagnóstico , Estudios Transversales , Depresión/diagnóstico , Análisis Factorial , Femenino , Humanos , Masculino , Persona de Mediana Edad , Reproducibilidad de los Resultados , Encuestas y Cuestionarios
4.
J Sports Sci ; 38(2): 130-139, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31696778

RESUMEN

The Acute Recovery and Stress Scale (ARSS) and the Short Recovery and Stress Scale (SRSS) are well-established monitoring tools in German-speaking countries. This study aimed at validating them for English-speaking populations. Overall, 996 athletes (536 males, 24.9 ± 9.1 years) of Australia/New Zealand (n = 380), the United Kingdom (n = 316), and North America (n = 300) participated. The 32-item ARSS consists of eight scales. These scales constitute the eight items of the SRSS with the corresponding ARSS items as descriptors. Confirmatory factor analysis (CFA), internal consistency (α), and discriminatory power of the items (rit) were calculated for the total and subsamples separately. Satisfactory discriminatory power (rit > .30) for all ARSS and SRSS items and acceptable internal consistency (α > .70) was achieved. CFA indicated good fit indices for the total sample and subsamples, and strong measurement invariance was found across subsamples and gender. Correlations between corresponding scales and items (rs = .68 - .78) support theoretical congruency as well as independent usage of both questionnaires. Construct validity of both tools is shown through hypothesis-conforming correlations with the Recovery-Stress Questionnaire for Athletes. Future studies may apply the ARSS and SRSS as monitoring tools in English-speaking regions worldwide.


Asunto(s)
Acondicionamiento Físico Humano/psicología , Estrés Psicológico , Encuestas y Cuestionarios , Adulto , Análisis Factorial , Femenino , Humanos , Lenguaje , Masculino , Psicometría , Adulto Joven
5.
J Oral Pathol Med ; 49(1): 55-62, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31605549

RESUMEN

BACKGROUND: The adoption of the Chronic Oral Mucosal Disease Questionnaire (COMDQ) into clinical practice has been low, despite its rigorous development process. A potential limitation of the COMDQ is the high response burden to patients. Therefore, the aim of the present study was to develop and validate a short version of the 26-item COMDQ. METHODS: The COMDQ data of 520 patients with chronic oral mucosal diseases were randomly divided into two subsamples. Descriptive item analysis and exploratory factor analysis (EFA) were performed using data from the first subsample for item reduction and development of the shortened COMDQ. The resulting short version was then validated using confirmatory factor analysis (CFA) on the other subsample. Internal consistency reliability of the short-form COMDQ was assessed using Cronbach's alpha. Criterion validity of this new scale was examined against its original version. RESULTS: Based upon item analysis, 11 items were dropped. EFA results on the remaining 15 items extracted four factors consistent with the original COMDQ, and CFA results displayed acceptable goodness-of-fit indices of this factor structure on different sample. The COMDQ-15 was then created. Cronbach's alpha of four subscale scores ranged from 0.7 to 0.91, indicating good internal consistency reliability of the COMDQ-15. Correlations between total and subscale scores of the COMDQ-15 and its parent scale were high, supporting good criterion validity of this shortened scale. CONCLUSION: The COMDQ-15 is a brief, valid and reliable instrument that can give an overview of the patient's quality of life related to their chronic oral mucosal conditions.


Asunto(s)
Calidad de Vida , Análisis Factorial , Humanos , Psicometría , Reproducibilidad de los Resultados , Encuestas y Cuestionarios
6.
Water Res ; 169: 115271, 2020 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-31731246

RESUMEN

Three-dimensional fluorescence spectroscopy has been widely used for the analysis of water contaminants. However, the problems of weak signals and overlapping fluorescence peaks remain unresolved. In this work, we studied the impact of absorption on the spectral shape of fluorescence and found that it is a major cause of overlapping peaks and weak signals. An approach is proposed to purify fluorescent signals and enhance fluorescence signatures based on the theory of fluorescence quantum yield. Using this theory, the problems of noise amplification and singularity points were identified, and an optimization algorithm was proposed related to Wiener filtering. For practical application to multiple compounds, three overlapping cases were discussed theoretically. The effectiveness of this procedure in subsequent parallel factor analysis was assessed and compared with original data by conducting experiments with six typical compounds and real water samples. The results indicate that overlapping along the excitation wavelength axis can be reduced despite the existence of multiple compounds, and the sensitivity of weak fluorescent signals can be significantly improved. The proposed method can enhance fluorescence signatures for the separation and analysis of fluorescent components in water contaminants.


Asunto(s)
Algoritmos , Agua , Análisis Factorial , Fluorescencia , Espectrometría de Fluorescencia
7.
Chemosphere ; 239: 124703, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31526999

RESUMEN

In recent years, precise environment supervision has gradually become vital in water pollution control, which requires the clear identification of dissolved organic matters (DOM) in wastewater. Metalworking fluid (MWF) is a type of wastewater with high toxicity. Over ten million m3 of MWF is discharged per year. However, its DOM characteristics have not yet been systematically investigated. Therefore, in this study, the fluorescent DOM (FDOM) of MWF was firstly characterized by excitation-emission matrix-parallel factor analysis (EEM-PARAFAC) and high-performance liquid chromatography (HPLC). Three fluorescent components (C1-C3) of the MWF from three metalworking plants (BO, TH, and YD) were identified. The peaks measured for C1 and C3 were attributed to tryptophan-like (Peak T) and humic/fulvic acid-like (Peak A + C) peaks, respectively, and the peaks at C2 were identified as humic-like (Peak A + M) or tryptophan-like (Peak T) peaks. There were differences in the C2 and C3 components of MWF from the three metalworking plants. The FDOM of MWF from the three metalworking plants exhibited similar polarity, but different apparent molecular weight distributions. In addition, the highest intensities of the three fluorescent peaks were sensitive to variations in the pH, humic acid (HA) concentrations, and metal ion levels (Cu2+, Fe3+, and Ni2+). The findings of this study not only indicate the FDOM characteristics of MWF, but also provide a promising method and valuable guidance for the practical monitoring of MWF in natural water bodies.


Asunto(s)
Fluorescencia , Sustancias Húmicas/análisis , Aguas Residuales/toxicidad , Cromatografía Líquida de Alta Presión , Análisis Factorial , Instalaciones Industriales y de Fabricación , Metales/análisis , Espectrometría de Fluorescencia/métodos , Aguas Residuales/análisis
8.
Chemosphere ; 239: 124734, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31494317

RESUMEN

Dam construction and fish culture can change the biogeochemical processes in river, yet their impact on the spectral properties of particulate organic matter (POM) remains to be studied. This was investigated in a reservoir-type river (Minjiang river, SE China) using absorption spectroscopy and fluorescence excitation-emission matrices-parallel factor analysis (EEMs-PARAFAC). Five fluorescent components were identified from POM with PARAFAC. Four components C1-C4 were affected by the seasonal variations of rainfall and runoff, indicating the influences of hydrological condition and terrestrial inputs. The Chlorophyll a concentration (Chl a) correlated significantly with the humic-like C3 (p < 0.05) and the protein-like C4 (p < 0.01), indicating phytoplankton was an important source of C3 and C4. The Chl a and fluorescence intensities of C3-C4 were higher in the fish culture zones than in other areas, and the absorption coefficient a300 and C1-C4 were lower downstream the dam. These results indicated that fish farming in the reservoir probably promoted the production of POM. The a300 and C1 per unit mass of suspended particulate matter (a300/TSM and C1/TSM) correlated significantly with the median particle size (p < 0.01), which might be related to the contribution of micro-phytoplankton. The absorption spectra of POM showed a shoulder peak at ∼280 nm, and its intensity correlated significantly and positively with Chl a (p < 0.01). These results indicated that the peak was probably derived from phytoplankton production. Our results have implications for better understanding the influences of human activities on the dynamics of river POM.


Asunto(s)
Explotaciones Pesqueras , Material Particulado/metabolismo , Ríos/química , Espectrometría de Fluorescencia/métodos , China , Clorofila A/metabolismo , Seguimiento de Parámetros Ecológicos , Monitoreo del Ambiente/métodos , Análisis Factorial , Fluorescencia , Tamaño de la Partícula , Material Particulado/análisis , Fitoplancton , Lluvia , Estaciones del Año
9.
Accid Anal Prev ; 134: 105351, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31715548

RESUMEN

INTRODUCTION: Mindful organizing (also known as collective mindfulness) is a team level construct that is said to underpin the principles of high-reliability organizations (HROs), as it has shown to lead to almost error-free performance. While mindful organizing research has proliferated in recent years, studies on how to measure mindful organizing are scarce. Vogus and Sutcliffe (2007) originally validated a nine-item "Mindful Organizing Scale" but few subsequent validation studies of this scale exist. The present study aimed to validate a Spanish version of the Mindful Organizing Scale. METHOD: The sample included 47 teams (comprising of a total of 573 workers with an average team size of 12.19) from a Spanish nuclear power plant. A confirmatory factor analysis (CFA), reliability analysis, and an analysis of aggregation indices were carried out. A correlation analysis and CFA were used to further validate the scale in terms of its distinctiveness from, and relationship with, other team-related variables such as safety culture, team safety climate, and team learning. Finally, evidence of criterion-related validity was collected by testing the incremental validity of the mindful organizing scale in the association with various workplace safety outcomes (safety compliance and safety participation). RESULTS: The results confirmed a unidimensional structure of the scale and indicated satisfactory internal consistency. Aggregation of the scores to the team level was justified while significant positive correlations between mindful organizing and other team-related variables (safety culture, team safety climate, team learning) were found. Moreover, mindful organizing showed distinctiveness from safety culture, team safety climate and team learning. Finally, incremental validity of the scale was supported, as it shows to be associated with safety compliance and safety participation above and beyond other related constructs. CONCLUSIONS: The Spanish version of the Mindful Organizing Scale has shown to be a valid and reliable scale that can be used to measure mindful organizing. CONTRIBUTIONS: The validation of the unidimensional Spanish version of Vogus and Sutcliffe's (2007) Mindful Organizing Scale provides researchers and practitioners with a reliable and valid tool to use in Spanish speaking organizations to measure mindful organizing, which has been shown to result in more reliable performance. Theoretically, this study offers four contributions. Firstly, it validates a scale that operationalizes the 'mindful organizing' construct in a traditional high-reliability organization (nuclear power plant) which has never been done before. Secondly, it offers evidence that a mindful organizing scale can be validated in a new cultural context and language (Spanish) to any of the previous studies done before it. Thirdly, it adds to our understanding of mindful organizing's nomological network by distinguishing it from other team and safety-related variables. Lastly, it builds on current research showing sound psychometric properties of a one-dimensional, quantitative measure of mindful organizing.


Asunto(s)
Atención Plena , Administración de la Seguridad/organización & administración , Encuestas y Cuestionarios/normas , Adulto , Análisis Factorial , Femenino , Humanos , Masculino , Persona de Mediana Edad , Plantas de Energía Nuclear/organización & administración , Psicometría , Reproducibilidad de los Resultados , Traducciones
10.
Sci Total Environ ; 699: 134301, 2020 Jan 10.
Artículo en Inglés | MEDLINE | ID: mdl-31525544

RESUMEN

The concentration, source and composition of dissolved organic matter (DOM) in aquatic ecosystems are associated with land use and hydrological connectivity between terrestrial and aquatic systems. However, direct evidence of the effects of rainfall and land use on the variability of DOM in aquatic ecosystems is very limited. In this study, chromophoric DOM (CDOM) absorption and fluorescence spectroscopy were used to elucidate how rainfall and land use affect the variability of CDOM in the watershed of Lake Tianmu, a key drinking water reservoir in the Yangtze River Delta. The mean values of the fluorescence intensity (Fmax) of parallel factor analysis-derived humic-like components (C1, C3, C6) and tryptophan-like components C5 were higher in the southeastern inflowing river mouths than those downstream of the lake outlet regions. The upstream tributaries were mainly dominated by humic-like materials, while the lake was mainly dominated by protein-like materials. The Fmax values of four humic-like components and two tryptophan-like components all increased significantly as the %woodland decreased, but %anthropogenic land use (%cropland+%urban construction area) increased. The Fmax of the humic-like components at the inflowing tributaries and the lake increased with increasing rainfall during storm events, and the value was especially pronounced at the inflowing river mouths. We concluded that land use and hydrological conditions play an important role in influencing the CDOM source and optical composition, and these findings provide insights for the understanding of aquatic ecosystem metabolism and reservoir water quality management.


Asunto(s)
Agua Potable/química , Monitoreo del Ambiente/métodos , Contaminación del Agua/análisis , China , Ecosistema , Análisis Factorial , Fluorescencia , Lagos/química , Lluvia , Ríos , Estaciones del Año , Espectrometría de Fluorescencia , Contaminación del Agua/estadística & datos numéricos , Calidad del Agua
11.
Sci Total Environ ; 700: 134360, 2020 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-31629259

RESUMEN

The characteristics of dissolved organic matter (DOM) in inflowing river, flowing into drinking water, have profound influences on the quality and safety of water. Here, ultraviolet-visible (UV-vis) spectroscopy and three-dimensional fluorescence (EEM) spectroscopy were combined to investigate the spatiotemporal variations of DOM in Nanfei River flowing into Chaohu Lake in China. 24 water samples and 24 surface sediments samples (including dry-to-wet transition season and wet season in 2018) were collected from different types of outlets. Parallel factor analysis (PARAFAC) model and correlation analysis were conducted to identify the primary sources of DOM. Two humic-like components (C1 235-250 nm/385-430 nm and C3 255-270 nm/455-510 nm) and one tryptophan-like component (C2 270-290 nm/320-350 nm) were effectively identified by PARAFAC model. The results showed DOM concentration presented significant spatiotemporal variations. The concentration was much lower in water than in surface sediments in dry-to-wet transition season, but higher in the wet season. Fluorescence index (FI), biological index (BIX) and humification index (HIX) were used to judge characteristic of DOM origination. These indexes indicated that, DOM in Nanfei River had both the characteristics of humus and autogenous, but neogene autogenic feature was stronger, which was largely due to mixture of water, resuspension and desorption of DOM in sediments and photochemical degradation. In addition, the characteristic parameter of molecular mass of DOM (the values of M) had an obvious linear relationship with the fluorescence intensity ratio of fulvic acid-like to humic acid-like (C1/C3), indicating that macromolecular substances could be removed by adding or improving membrane treatment. These provided technical support for improving quality and comprehensive treatment of drinking water sources.


Asunto(s)
Monitoreo del Ambiente/métodos , Sustancias Húmicas/análisis , Contaminantes del Agua/análisis , Benzopiranos , China , Agua Potable/química , Análisis Factorial , Fluorescencia , Ríos/química
12.
Spec Care Dentist ; 40(1): 71-78, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31858622

RESUMEN

AIMS: The dental activities test (DAT), designed to assess individuals' ability to perform oral health-related activities, was initially tested among 90 assisted living residents with normal to severely impaired cognition. This study aimed to examine the reliability (internal consistency), convergent validity, and structural validity of DAT among individuals with stroke. METHODS AND RESULTS: This study was a secondary analysis of data collected for a cross-sectional study that aimed to understand oral disease patterns among 207 individuals with stroke from three hospitals in China. Convergent validity was examined using Spearman's Correlation coefficient (rs ) for correlation between DAT scores and the assessments of physical function and cognition. Structural validity was examined using Confirmatory Factor Analysis (CFA). The DAT demonstrated good estimates for internal consistency (Kuder Richardson-20 = 0.85, 95% confidence of interval [CI] = 0.82, 0.88), convergent validity (rs range: 0.43-0.61, all P < .001), and good structural validity with a one-factor structure. CONCLUSION: Findings supported the reliability and validity of DAT as a unidimensional construct in measuring the ability to perform oral health-related activities in persons with stroke. Further testing among different patient populations and care settings is needed to accumulate evidence and expand the use of the test.


Asunto(s)
Accidente Cerebrovascular , China , Estudios Transversales , Análisis Factorial , Humanos , Psicometría , Reproducibilidad de los Resultados , Encuestas y Cuestionarios
13.
Bioresour Technol ; 296: 122316, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31677403

RESUMEN

A swirling demulsified airlift loop reactor (SD-ALR) was developed for the treatment of oily wastewater with yeasts. Computational fluid dynamics simulations showed that the gas holdup and liquid velocity gradient in the SD-ALR were 2.9% and 0.37 m/s higher than those in the traditional airlift loop reactor. The optimization results of the swirling demulsifier showed that the optimal number and elevation angle of the blades were 8 and 45°, and the optimal installation position was 150 mm from the bottom of the draft tube. The results of treating refined soybean oil wastewater in the SD-ALR showed that the wastewater treatment time was decreased by 8 h, and the removals of chemical oxygen demand and oil content increased by 5.10% ±â€¯0.02% and 9.55% ±â€¯0.40%, respectively, compared with those in the traditional airlift loop reactor. A volumetric mass transfer coefficient model was established for SD-ALR and oily wastewater.


Asunto(s)
Hidrodinámica , Aguas Residuales , Reactores Biológicos , Análisis Factorial , Aceite de Soja
14.
Braz Oral Res ; 33: e113, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31800864

RESUMEN

The objective of this study was to compare the scores of the Helplessness, Magnification, Rumination, and Catastrophizing factors of the Pain Catastrophizing Scale (PCS) between samples with different pain characteristics. The psychometric properties of the PCS were evaluated in 1,151 Brazilian adults (78.9% female; 38.6 (SD = 10.8) years): 335 had no pain, 390 had been in pain for less than 3 months, 250 had been in recurring pain for more than 3 months, and 176 had been in continuous pain for more than 3 months. Confirmatory factor analysis (CFA) was conducted to verify the fit of the PCS models. Convergent validity and reliability were evaluated. Multi-group analysis was used to estimate the invariance of the factorial model. The global score for the PCS factors was obtained using the regression weight matrix for estimating factor scores from CFA. Analysis of variance was used to compare scores between samples. After excluding three items, the tri-factorial model showed adequate fit. The model parameters were invariant (Δχ2(λ,i,ß,Res); p≥0.05). Individuals experiencing pain showed higher scores for catastrophic thoughts. Individuals with pain for less than 3 months had the highest scores for Rumination (p < 0.001). The PCS showed valid, reliable, and invariant results for the sample of Brazilian adults in no pain or with different pain conditions. The PCS adequately discriminated individuals in pain from those without pain. Among those in pain, Rumination was the only discriminating factor.


Asunto(s)
Catastrofización/psicología , Desamparo Adquirido , Dimensión del Dolor/psicología , Dolor/psicología , Rumiación Cognitiva , Brote de los Síntomas , Adulto , Análisis de Varianza , Brasil , Estudios Transversales , Análisis Factorial , Femenino , Humanos , Masculino , Dimensión del Dolor/métodos , Escalas de Valoración Psiquiátrica , Psicometría , Valores de Referencia , Reproducibilidad de los Resultados , Encuestas y Cuestionarios
15.
Acta colomb. psicol ; 22(2): 292-318, July-Dec. 2019. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1019286

RESUMEN

Abstract Resilience implies a process of positive adjustment to adverse conditions. The growing interest in their study demands the need for valid and reliable measurement instruments that allow assessments with scientific rigor in different types of populations. The aim of the present research was to analyze the psychometric properties of the Resilience Questionnaire for Children and Adolescents. 512 students from a high school of the University of Guadalajara, Mexico, participated. Exploratory factor analysis yielded a four-dimensional composition with 18 items than explain 61.18% of the variance, with an excellent level of reliability (a = .90). Through confirmatory factor analysis, the model was corroborated, presenting adequate levels of adjustment. Convergent validity was assessed using Rosenberg's Self-esteem Scale, obtaining significant positive correlations with the dimensions of resilience. The divergent validity was assessed through the Depression Scale of the Epidemiological Studies Center - Revised, showing significant negative correlations. Results and practical implications are discussed.


Resumo O estudo da resiliência, capacidade que implica um processo de adaptação positiva às condições de adversidade, passou por um crescente interesse nos últimos anos que demanda a necessidade de contar com instrumentos de medição válidos e confiáveis que permitam realizar avaliações com rigor científico em diferentes tipos de população. Por esse motivo, a presente pesquisa teve como objetivo analisar as propriedades psicométricas do Questionário de Resiliência para Crianças e Adolescentes com uma amostra de 512 estudantes do Ensino Médio preparatório da Universidade de Guadalajara, no México. Inicialmente, realizou-se uma análise fatorial exploratória que resultou em uma composição de quatro dimensões com 18 itens que explicam 61,18% da variância, com um nível de confiabilidade alto (a = .90), e uma análise fatorial confirmatória com a qual se corroborou o modelo, com níveis adequados de ajuste. Posteriormente, avaliou-se a validade convergente do instrumento com a Escala de Autoestima de Rosenberg, com a qual foram obtidas correlações positivas significativas com as dimensões da resiliência. E, por último, aplicou-se a validade divergente com a Escala de Depressão do Centro de Estudos Epidemiológicos (Revisada), com a qual foram encontradas correlações negativas significativas. Por fim, discutem-se os resultados e as implicações práticas.


Resumen El estudio de la resiliencia, capacidad que implica un proceso de adaptación positiva a condiciones de adversidad, ha tenido un creciente interés en los últimos años que demanda la necesidad de contar con instrumentos de medición válidos y confiables que permitan hacer evaluaciones con rigor científico en diferentes tipos de poblaciones. Por esta razón, la presente investigación tuvo como objetivo analizar las propiedades psicométricas del Cuestionario de Resiliencia para Niños y Adolescentes con una muestra de 512 estudiantes de una preparatoria de la Universidad de Guadalajara, México. Inicialmente, se realizó un análisis factorial exploratorio que arrojó una composición de cuatro dimensiones con 18 ítems que explican 61.18% de la varianza, con un nivel de confiabilidad alto (a = .90); y un análisis factorial confirmatorio con el que se corroboró el modelo, con niveles adecuados de ajuste. Posteriormente, se evaluó la validez convergente del instrumento con la Escala de Autoestima de Rosenberg, donde se obtuvieron correlaciones positivas significativas con las dimensiones de la resiliencia. Y, por último, se valoró la validez divergente con la Escala de Depresión del Centro de Estudios Epidemiológicos (Revisada), donde se encontraron correlaciones significativas negativas. Al final se discuten los resultados y las implicaciones prácticas.


Asunto(s)
Humanos , Masculino , Femenino , Adolescente , Análisis Factorial , Adolescente , Resiliencia Psicológica
16.
Acta colomb. psicol ; 22(2): 319-341, July-Dec. 2019. tab
Artículo en Inglés | LILACS | ID: biblio-1019287

RESUMEN

Abstract The objective of the present study was to analyze the psychometric properties (evidences of validity and reliability) of the ENCAO in employees of a private company of the hydrocarbon sector in Metropolitan Lima. A sample of 384 participants was evaluated, of whom 64 % were women and 36% men, aged between 19 and 56 years (M = 29.57 years, SD = 7.33). As evidences of validity related to the internal structure, an exploratory factorial analysis (EFA) and a confirmatory factorial analysis (CFA) were carried out, resulting in a structure of four related factors (Organizational Learning and Culture, Social Learning, Group Learning and Strategic Individual Learning) with the 21 items on the scale that explained 60.33 % of the total variance and with adequate goodness of fit indexes (x 2 = 371.6, x 2/df = 2.03, CFI = .99, RMSEA = .041). As a source of external validity, moderate correlations (between .31 and .46) were obtained with the variable Job Satisfaction. The Cronbach alpha coefficients of the four factors obtained ranged between .60 and .84. It is concluded that the ENCAO and its derived scores are a valid and reliable measure to measure organizational learning in the evaluated labor sector.


Resumo O objetivo do presente estudo foi analisar as propriedades psicométricas (evidências de validade e confiabilidade) da ENCAO em trabalhadores de uma empresa privada do setor de hidrocarbonetos na região metropolitana de Lima, no Peru. Para isso, avaliou-se uma amostra de 384 participantes, 64 % mulheres e 36 % homens, com idades compreendidas entre 19 e 56 anos (M= 29.57 anos, DP = 7.33). Como evidências de validade relacionada à estrutura interna, realizou-se uma análise fatorial exploratória (AFE) e uma análise fatorial confirmatória (AFC) com as quais foi encontrada uma estrutura de quatro fatores relacionados (formação e cultura organizacional, aprendizagem social, aprendizagem grupal e aprendizagem estratégica individual) com os 21 itens da escala, os quais explicaram o 60.33 % da variância total e obtiveram adequados índices de bondade de ajuste (x 2 = 371.66; x 2 /gl = 2.03; CFI = .99; RMSEA = .041). Como fonte de validade externa foram obtidas correlações moderadas (entre .31 e .46) com a variável satisfação laboral. Os coeficientes alfa de Cronbach dos quatro fatores oscilaram entre .60 e .84. Conclui-se que a ENCAO e suas pontuações derivadas são uma medida válida e fiável para medir a aprendizagem organizacional no setor laboral avaliado.


Resumen El objetivo del presente estudio fue analizar las propiedades psicométricas (evidencias de validez y confiabilidad) de la ENCAO en trabajadores de una empresa privada del sector de hidrocarburos en Lima Metropolitana. Para esto, se evaluó a una muestra de 384 participantes, 64 % mujeres y 36 % hombres, con edades entre los 19 y los 56 años (M= 29.57 años, DE = 7.33). Como evidencias de validez de la estructura interna del instrumento, se realizó un análisis factorial exploratorio (AFE) y un análisis factorial confirmatorio (AFC), donde se encontró una estructura de cuatro factores relacionados (formación y cultura organizacional, aprendizaje social, aprendizaje grupal y aprendizaje estratégico individual) con los 21 ítems de la escala, los cuales explicaron el 60.33 % de la varianza total y obtuvieron adecuados índices de bondad de ajuste (x 2 = 371.66; x 2 /gl = 2.03; CFI = .99; RMSEA = .041). Como fuente de validez externa se obtuvieron correlaciones moderadas (entre .31 y .46) con la variable satisfacción laboral. Los coeficientes alfa de Cronbach de los cuatro factores oscilaron entre .60 y .84. Se concluye que la ENCAO y sus puntuaciones derivadas son una medida válida y fiable para medir el aprendizaje organizacional en el sector laboral evaluado.


Asunto(s)
Humanos , Masculino , Femenino , Adulto , Sociedades , Reproducibilidad de los Resultados , Análisis Factorial
17.
Estud. pesqui. psicol. (Impr.) ; 18(4): 1299-1322, out.-dez. 2019.
Artículo en Español | LILACS, Index Psicología - Revistas técnico-científicas | ID: biblio-995100

RESUMEN

Se describe la integración de tres mujeres argentinas a la carrera científica durante la década de 1960 desde sus estudios doctorales en un laboratorio extranjero. Se analizan los auspicios personales y los apoyos en políticas públicas que les otorgaron oportunidades para producir y gestionar ciencia. Se trata de Hermelinda Fogliatto, Rosalía Paiva y Ana María Insúa quienes comenzaron su actividad profesional en el ámbito educativo accediendo a la Psicología. Cuando en el país no existía tradición de promover doctorados en esa disciplina, ellas lo lograron en el Laboratorio de Psicometría de la Universidad de Loyola (Chicago) bajo la dirección de Horacio Rimoldi, quien las impulsó en su carrera. Desde modelos factoriales, condujeron investigaciones sobre procesos de pensamiento para la resolución de problemas que se convirtieron en referencia internacional. Las tres mujeres se desempeñaron en instituciones de Estados Unidos con financiamiento de agencias oficiales de salud y educación. Dos de ellas regresaron a Argentina donde ingresaron al Consejo Nacional de Investigaciones Científicas y Técnicas. Se discute el rol de dicha institución en la promoción de la investigación en psicología, el lugar de la misma en las carreras universitarias y su incidencia en el perfil de psicólogo.(AU)


O processo de integração de três mulheres argentinas na carreira científica é descrito a partir do momento em que eles obtiveram um doutorado em psicologia enquanto estavam trabalhando em um laboratório estrangeiro durante a década de 1960. A trajetória de Hermelinda Fogliatto, Rosalía Paiva e Ana María Insúa é retratada revelando sua chegada da educação ao campo da psicologia. Enquanto não havia tradição de promover o doutorado em psicologia na Argentina, eles conseguiram nesse objetivo sob a direção de Horacio Rimoldi no Laboratório Psicométrico da Universidade de Loyola (Chicago), que as encorajou em suas carreiras. Eles realizaram pesquisas sobre o processo de pensamento para resolução de problemas, com o modelo fatorial, consideradas como referência internacional. Trabalharam para organizações apoiadas pelas agências de Saúde e Educação dos Estados Unidos. Duas delas retornaram à Argentina onde trabalharam para o Consejo Nacional de Investigaciones Científicas y Técnicas. Discute-se o papel desta instituição na promoção da pesquisa psicológica bem como o lugar da pesquisa no treinamento e perfil dos psicólogos.(AU)


The integration of three Argentine women in the scientific career is described from the time they obtained a PhD in Psychology while working at a foreign laboratory in the 60's. The auspices under which they were integrated in the scientific career and the public policies which supported them are analyzed to understand how they took advantage from the opportunities they had to produce and manage science. The paths of Hermelinda Fogliatto, Rosalía Paiva and Ana María Insúa are portrayed revealing their arrival from education to the field of psychology. While there was no tradition of promoting PHDs on psychology in Argentina, they achieved this goal at the Psychometric Laboratory of Loyola University (Chicago) under the direction of Horacio Rimoldi, who encouraged their careers. Applying factorial models, they conducted research on the thinking process for problem solving, which was considered work of international reference. These women worked for organizations supported by Health and Education agencies of the United States. Two of them returned to Argentina where they worked for the National Council of Scientific and Technical Research. The role of this institution for the promotion of psychology research is discussed, as well as the place research had in psychologists training and profiles.(AU)


Asunto(s)
Psicología/historia , Mujeres Trabajadoras/psicología , Pensamiento , Análisis Factorial
18.
Zhongguo Zhong Yao Za Zhi ; 44(20): 4454-4459, 2019 Oct.
Artículo en Chino | MEDLINE | ID: mdl-31872632

RESUMEN

To evaluate the pharmacodynamic effect of Siwu Decoction in treating blood deficiency in mice under multidimensional pharmacodynamic indexes by factor analysis. The mouse blood deficiency model was established with cyclophosphamide combined with acetophenone; and mouse organ index,white blood cells,red blood cell,hemoglobin,platelet counts in whole blood,serum granulocyte-macrophage colony-stimulating factor,macrophagecolony-stimulating factor,promotion erythropoietin,interleukin-3 and interleukin-6 were used as indicators to characterize the blood-enriching effect of Siwu Decoction; the pharmacodynamic effect of Siwu Decoction on blood deficiency model was evaluated comprehensively by factor analysis. Four common factors were extracted from 14 pharmacodynamics indexes through the factor analysis,namely blood phase factor,viscera index,hematopoietic regulatory factor 1-spleen index and hematopoietic regulatory factor 2-viscera index. The cumulative contribution rate of variance reached 86. 581%. The comprehensive score of factor analysis showed that Siwu Decoction had the best effect on blood replenishment,and it is significant compared with the model group( P<0. 01). The effect of alcohol precipitation of Siwu Decoction was slightly decreased. The study showed that Siwu Decoction has the best blood-enriching effect,followed by water decoction and traditional decoction. Alcohol precipitation had the worst effect. Factor analysis can be used for the comprehensive evaluation of blood deficiency mice model,and is a suitable evaluation method for animal model for multi-dimensional multistage complex data analysis. It provides a new model to evaluate the efficacy of multidimensional data in the future.


Asunto(s)
Medicamentos Herbarios Chinos/farmacocinética , Animales , Análisis Factorial , Ratones
19.
Environ Monit Assess ; 191(12): 770, 2019 Nov 26.
Artículo en Inglés | MEDLINE | ID: mdl-31768655

RESUMEN

Appropriate clinical waste management is a critical concern in today's era. Resource-constrained countries agonize greatly over this issue in order to mitigate inappropriate clinical waste management practices. The goal of this study is to assess factors behind inappropriate waste management of small clinics in resource-constrained countries. We tested the hypothesis that negligence of government, knowledge and awareness, and financial burden are three key factors behind inappropriate solid waste management of small clinics. A two-phase survey including a pilot study and a main study was conducted for exploratory factor analysis and confirmatory factor analysis, respectively, in the fourth largest city of Pakistan, i.e., Hyderabad. One sample t test was used to validate the hypothesis, the correlation between the three key factors, and the location of the clinics were established. These factors were found to have a contribution to inappropriate waste management of small clinics. The hypothesis was then validated, and all three factors were found to have no significant variation in responses with the contrast of three types of clinic locations, namely, low-, medium-, and high-income areas. Responses were almost identical and bear equal significance from all locations, the financial burden factor is at the highest, the second factor is the negligence of government, and the third factor is that of knowledge and awareness. This study highlights the factors that are usually neglected and can help to improve solid waste management of small clinics in resource-constrained countries.


Asunto(s)
Instituciones de Atención Ambulatoria , Residuos Sólidos , Administración de Residuos , Instituciones de Atención Ambulatoria/economía , Instituciones de Atención Ambulatoria/organización & administración , Instituciones de Atención Ambulatoria/normas , Monitoreo del Ambiente , Análisis Factorial , Humanos , Pakistán , Proyectos Piloto , Administración de Residuos/economía , Administración de Residuos/normas
20.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao ; 41(5): 615-621, 2019 Oct 30.
Artículo en Chino | MEDLINE | ID: mdl-31699191

RESUMEN

Objective To validate the Union Physio-Psycho-Social Assessment Questionnaire(UPPSAQ-70)and test its validity and reliability.Methods From April,2013 to July,2018,patients were asked to finish the computer evaluation of UPPSAQ-70 and Symptom Checklist 90(SCL-90)in Peking Union Medical College Hospital(PUMCH).Confirmatory factor analysis(CFA)was conducted on the SPSS 17.0,and the number of fixed factors was 8 factors and 3 factors.Amos 23.0 was used to verify the original 8-factor model,8-factor revision model,3-factor model,3-factor revision model,and single-factor model.Each factor of SCL-90 was used as the calibration standard to calculate the correlation coefficient between factors.The retest reliability was tested by the outpatients in PUMCH in July,2018.Results Exploratory factor analysis indicated that the 8-factor revised model included:depression,anxiety and fatigue,sleep,physical discomfort,sexual function,happiness and satisfaction,hypochondria,and social anxiety.The 3 factors revised model included that:psychological,physiological and social dimension.Confirmatory factor analysis indicated that the 8-factor modified model was superior to the 3-factor model and the single-factor model: χ 2=10 410.4,df=1862,RMSEA=0.07,CFI=0.753,and NFI=0.715.With SCL-90 as the standard criteria,except the low correlation coefficient between emotional scale and depression(r=0.600)and anxiety(r=0.520),the correlation coefficients of other symptoms were below 0.5.The chronbach's α between each factor and total score of UPPSAQ-70 was between 0.823 and 0.904,and the Chronbach's α coefficient of the whole scale was between 0.954 and 0.956 after each item was deleted.The retest reliability of the scale of 32 participants Chronbach's α was 0.847.Each item of the scale measured between one week was significantly correlated(P<0.05). Conclusion UPPSAQ-70 is a good scale for evaluating overall health status and is especially feasible in general hospitals.


Asunto(s)
Pruebas Psicológicas/normas , Psicometría , Encuestas y Cuestionarios , Análisis Factorial , Humanos , Reproducibilidad de los Resultados
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