Consulta: subjectFacets:"Factor analysis"
Registros recuperados: 52
Data/hora: 11/06/2024 11:00:52

A STUDY OF THE IMPACT OF LAND USE AND OCCUPATION ON BASIN WATER QUALITY THROUGH MULTIVARIATE STATISTICS
Provedor de dados: 70
Autores: Santos,Gilmar O.; Hernandez,Fernando B. T.; Ferraudo,Antonio S.; Vanzela,Luiz S.; Santos,Duílio J. O.
ABSTRACT Without effective actions to improve environmental management, water resources tend to become scarce. Thus, this study aimed to understand the processes influencing the physical, chemical, and biological properties of the water due to land uses and occupation in the Ipê stream basin, in Ilha Solteira - SP (Brazil), regarding the dependence of the analyzed variables. Monitoring of chemical, physical, and biological water quality was performed from 2006 to 2011, and the records of land use and occupation in 2011. A factorial multivariate analysis allowed us to understand that the processes in densely populated areas increased degradation of water by the input of organic loads, yet those of farming areas enhanced the degradation of the chemical and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Factor analysis; Irrigation; Land use and occupation; River basin.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300453

Études méthodologiques développées à l'échelle nationale. Livrable 1 – Confiance et précision pour l'indicateur M-AMBI
Provedor de dados: 5
Autores: Brun, Mélanie.
The index used by France to assess the quality of coastal water bodies of the Water Framework Directive (WFD), for the Channel-Atlantic coast and for the quality element "soft substratum benthic invertebrates" is the M-AMBI. In their work, Sigovini et al. (2013) compare several methods of calculating M-AMBI and alternative indices with the values of M-AMBI. Their results show strong correlations between the values of the M-AMBI and those of the proposed alternatives. In a first step, the present work aims to compare M-AMBI values, obtained during the application of the assessment procedure of the quality of coastal water bodies for the Channel-Atlantic coast on the 2007 and 2010 data, with the values obtained for various alternative calculations and...
Tipo: Text
Palavras-chave: M-AMBI; Richesse; Indice de Shannon-Weaver; AMBI; Analyse factorielle; Directive Cadre sur l’Eau; Contrôles de surveillance 2007 et 2010; Standardisation; Bootstrap; Invertébrés benthiques; Manche-Atlantique; M-AMBI; Richness; Shannon-Weaver index; AMBI; Factor analysis; Water Framework Directive; Monitoring 2007 and 2010; Standardization; Bootstrap; Benthic invertebrates; Channel-Atlantic coast.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00333/44394/44025.pdf

Long-term changes (1979-1994) in two coastal benthic communities (English Channel): analysis of structural developments
Provedor de dados: 5
Autores: Davoult, D; Dewarumez, Jm; Migne, A.
The long-term variations of two coastal benthic communities (Eastern English Channel, France) were studied between 1979 and 1994 by means of factor correspondence analysis (FCA), trophic structure and rank-frequency diagrams (RFD). FCA identified periods of relative homogeneity and periods of strong variation in the structure of the two communities. The first community, established on heterogeneous sand, showed a multi-annual cycle Linked to grain-size variations in the sediment. As passive supplies of organic matter were not important and suspension feeders could hardly live in these conditions, the community remained poor and stable and was dominated by deposit-feeders and carnivores. The other one, a rich and diverse mussel (Mytilus edulis) bed, showed...
Tipo: Text
Palavras-chave: Série à long terme; Benthos; Analyse factorielle; Diagrammes rang-fréquence; Structure trophique; Long-term series; Benthos; Factor analysis; Rank-frequency diagrams; Trophic structure.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43663/43207.pdf

日本短角種肥育記録および枝肉成績に関する要因解析
Provedor de dados: 19
Autores: 口田, 圭吾; 山岸, 敏宏; Kuchida, Keigo; Yamagishi, Toshihiro.
Palavras-chave: Japanese Shorthorn; Fattening and carcass traits; Factor analysis.
Ano: 1992
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/932

Methods of adaptability and stability applied to eucalyptus breeding
Provedor de dados: 86
Autores: Santos,Osmarino Pires dos; Carvalho,Ivan Ricardo; Nardino,Maicon; Olivoto,Tiago; Pelegrin,Alan Junior de; Szareski,Vinícius Jardel; Ferrari,Mauricio; Nunes,Andrei Caíque Pires; Demari,Gustavo Henrique; Lautenchleger,Francine; Souza,Velci Queiróz de; Maia,Luciano Carlos da.
Abstract: The objective of this work was to evaluate the consistency of the methods of Annicchiarico, Lin &amp; Binns, Wricke, and factor analysis in identifying eucalyptus clones with stability, adaptability, and high productive potential. Eight-four clones, with three years of age, from the genetic breeding program of the company CMPC Celulose Riograndense were used. Three field experiments were carried out in a randomized complete block design, in an 84x3 factorial arragement, with 20 replicates of one plant per plot. The clones were evaluated as to diameter at breast height, plant height, and volume of wood. The methods of Annicchiarico and Lin &amp; Binns are highly correlated with each other, and their use together with the method of Wricke is a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eucalyptus; Average ranking; Experimental planning; Factor analysis; Selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000100053

A factor analysis approach to measure the biased effects of retail fruit juice advertising
Provedor de dados: 31
Autores: Gao,   Xiaoming; Lee,   Jonq-Ying.
Tipo: Report
Palavras-chave: Fruit juice advertising; Factor analysis; Agribusiness; Demand and Price Analysis.
Ano: 1994
URL: http://purl.umn.edu/52742

Biased estimates in discrete choice models: the appropriate inclusion of psychometric data into the valuation of recycled wastewater
Provedor de dados: 31
Autores: Gibson,   Fiona L.; Burton,   Michael P.
The introduction of measurement bias in parameter estimates into non-linear discrete choice models, as a result of using factor analysis, was identified by Train et al. (1987). They found that the inclusion of factor scores, used to represent relationships amongst like variables, into a subsequent discrete choice models introduced measurement bias as the measurement error associated with each factor score is excluded. This is an issue for non-market valuation given the increase in popularity of including psychometric data, such as primitive beliefs, attitudes and motivations, in willingness to pay estimates. This study explores the relationship between willingness to pay and primitive beliefs through a case study eliciting Perth community values for...
Tipo: Conference Paper or Presentation
Palavras-chave: Discrete choice models; Attitudes; Factor analysis; Measurement models; Recycled wastewater.
Ano: 2009
URL: http://purl.umn.edu/47943

ANALYZING AGRICULTURE PRODUCTIVITY INDICATORS AND IMPACT OF CLIMATE CHANGE ON CEECS AGRICULTURE
Provedor de dados: 31
Autores: Singh,   Mahesh Kumar; Kapuszta,   Agnes; Fekete-Farkas,   Maria.
The agriculture has an outstanding importance both in social and economic point of view, especially in the countries where the agriculture plays a vital role in economy. This paper mainly focuses on the situation in the Central and Eastern European countries (CEECs). The share of agriculture in CEECs is more significant both in GDP and employment than in the old member states of EU. To be competitive on the single market, we have to know the advantages and disadvantages, strength and weakness of different sectors of agriculture. Traditionally, in these countries to measure the effectiveness, the partial factor analyses are used. To get more accurate overview, we need to use more wide technique to sampling measurement. This paper summarizes the measurement...
Tipo: Book
Palavras-chave: Sustainability; Effectiveness; Environment; Agricultural policy; Factor analysis; Agricultural and Food Policy; Land Economics/Use.
Ano: 2008
URL: http://purl.umn.edu/43317

IMPORTÂNCIA DAS EXIGÊNCIAS TÉCNICAS À EXPORTAÇÃO DE EMPRESAS BRASILEIRAS
Provedor de dados: 31
Autores: Souza,   Mauricio Jorge Pinto de; Burnquist,   Heloisa Lee.
This article presents results of a survey applied to Brazilian exporting firms to obtain primary data, which are subject to a statistical analysis about the relative importance attributed to technical barriers to trade. The methodological procedure used consisted in Rio Branco – Acre, 20 a 23 de julho de 2008 Sociedade Brasileira de Economia, Administração e Sociologia Rural factor analysis. This allowed the construction of three indexes: Traditional determinants Index - ICOND, Trade Impediments Index - IIMP and Technical requirements Index - IEXIG. The results indicated that technical requirements effects are different than other variables that affect exports. Additionally, the firms surveyed considered the IEXIG more restrictive than IIMP to their...
Tipo: Conference Paper or Presentation
Palavras-chave: Technical barriers; Brazilian exports; Factor analysis; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/96281

Factors Affecting Maize Producers Adoption of Forward Pricing in Price Risk Management: The Case of Vaalharts
Provedor de dados: 31
Autores: Jordaan,   Henry; Grove,   Bennie.
Logistic regression is employed to analyse the factors which influence the decision of whether or not the respondent used forward pricing methods during the 2004/05 maize production season.  Forward pricing methods include cash forward contracting and hedging with futures contracts and/or options, through the South African Futures Exchange (SAFEX).  Based on the results, the use of forward pricing is associated with lower levels of risk aversion and higher levels of human capital.  Factor analysis is employed to reduce the dimensionality of the personal reasons which help to interpret the underlying, common factor of the personal reasons why farmers are reluctant to use forward pricing methods.   Three factors were extracted and were labelled “Lack of...
Tipo: Journal Article
Palavras-chave: Forward pricing; Logit; Factor analysis; Agricultural Finance; Risk and Uncertainty.
Ano: 2007
URL: http://purl.umn.edu/7049

Comprehensive Study on the Human Driving Forces of Cultivated Land and Construction Land Use Change in Hubei Province, China
Provedor de dados: 31
Autores: Xu,   Xin-chuang; Cheng,   Dong-lai; Liu,   Cheng-wu.
Change trend of cultivated land in Hubei Province is analyzed. The years 1998-2003 are the reduction period of cultivated land; the years 2004-2007 are the increase period of cultivated land; the years 1988-2002 are the slow growth period of construction land; and the years of 2003 and 2007 are the increase period of construction land. Based on related social economic statistical data in 1988-2007, human driving forces on cultivated land and construction land in Hubei Province are analyzed quantitatively and comparatively by using SPSS software and mathematical statistical method. Result shows that driving forces have negative driving effect on cultivated land, and positive driving effect on construction land. Driving forces have significant differences of...
Tipo: Journal Article
Palavras-chave: Cultivated land; Construction land; Factor analysis; Human driving force; China; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/93574

A Typology of Food Security in Developing Countries under High Food Prices
Provedor de dados: 31
Autores: Yu,   Bingxin; You,   Liangzhi; Fan,   Shenggen.
The recent surge in food prices around the world may reverse the gains of reducing hunger and poverty in the recent years. This paper employs factor and sequential typology analysis using data for 175 countries to identify groups of countries categorized according to four measures of food security: utilization, availability, accessibility and stability. Nine indicators are used for this study: calories intake, protein intake, fat intake, food production, the ratio of total exports to food imports, soil fertility, length of growing period, coefficient of variation of length of growing period and urbanization. The analysis first identifies 5 distinct food security groups characterized by food intake then further split these groups based on similarities and...
Tipo: Conference Paper or Presentation
Palavras-chave: Food security; Factor analysis; Agricultural potential; Typology; Trade; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Development; C0; F0; O1.
Ano: 2009
URL: http://purl.umn.edu/51043

ADOPTION OF E-COMMERCE STRATEGIES FOR AGRIBUSINESS FIRMS
Provedor de dados: 31
Autores: Henderson,   Jason R.; Dooley,   Frank J.; Akridge,   Jay T.
This paper analyzes the factors guiding Internet and e-commerce implementation by agribusiness firms.  The relationship between Internet/e-commerce strategies and manager perceptions on the barriers and factors to e-commerce adoption are analyzed in a supply-chain management framework.  Using factor analysis and an ordered Probit model, results indicate that the implementation of Internet/e-commerce strategies is more likely to be adopted in larger firms with a global scope.  Also, manager perceptions regarding supply-chain functions influencing transaction costs are more strongly associated with Internet/e-commerce adoption than other functions influencing production costs.
Tipo: Conference Paper or Presentation
Palavras-chave: E-commerce; Supply-chain; Transaction costs; Factor analysis; Order Probit; Agribusiness; Marketing.
Ano: 2000
URL: http://purl.umn.edu/21771

Factor that Affect Arkansas Farm Operators’ and Landowners’ Decision to Participate in Agritourism
Provedor de dados: 31
Autores: Rainey,   Daniel V.; Djunaidi,   Harjanto; McCullough,   Stacey W.; Das,   Biswa R.
This study utilizes survey data analyzed at the regional level to obtain additional insights which may be left unnoticed if the analysis only considers data at the state level.  The current analysis reveals that farm operators’ and/or landowners’ decision to participate in the agritourism industry in Arkansas is affected by state government infrastructure.   But these infrastructures are varied among regions.  The infrastructures are state government support in training the farm operators; in promotion and marketing as well as certainty and transparency in laws and regulations.  State government’s sponsored trainings in agritourism along with marketing and promotion are viewed as the most important factors in all studied regions that affect operators’...
Tipo: Conference Paper or Presentation
Palavras-chave: Agritourism; Factor analysis; Farm Management.
Ano: 2010
URL: http://purl.umn.edu/56521

INDICADORES DE AVALIAÇÃO DE DESEMPENHO ECONÔMICO EM COOPERATIVAS AGROPECUÁRIAS: UM ESTUDO EM COOPERATIVAS PAULISTAS
Provedor de dados: 31
Autores: Carvalho,   Flavio Leonel de; Bialoskorski Neto,   Sigismundo.
The objective of this work was to identify the main economic and financial indicators which should be considered in the evaluation of the performance of agricultural cooperatives. Cooperatives have two dimensions, social and economic, and studies have shown that, in agricultural cooperatives, the social performance is a consequence of the economic performance. Therefore, the performance of these entities was evaluated using economic and financial indicators. Applying the Factor Analysis statistical technique to 150 financial statements of agricultural cooperatives from São Paulo state, from 2001 to 2006, it was possible to find out the level of correlation among several indicators, as well as to group them into factors. Four main factors were found by...
Tipo: Journal Article
Palavras-chave: Economical indicators; Factor analysis; Performance.; Agribusiness; Agricultural Finance; Industrial Organization.
Ano: 2008
URL: http://purl.umn.edu/61736

Factor Analysis on the Factors that Influencing Rural Environmental Pollution in the Hilly Area of Sichuan Province, China
Provedor de dados: 31
Autores: Ling,   Jing; Deng,   Liang-ji.
By using factor analysis method and establishing analysis indicator system from four aspects including crop production, poultry farming, rural life and township enterprises, the difference, features, and types of factors influencing the rural environmental pollution in the hilly area in Sichuan Province, China. Results prove that the major factor influencing rural environmental pollution in the study area is livestock and poultry breeding, flowed by crop planting, rural life, and township enterprises. Hence future pollution prevention and control should set about from livestock and poultry breeding. Meanwhile, attention should be paid to prevention and control of rural environmental pollution caused by rural life and township enterprise production.
Tipo: Journal Article
Palavras-chave: Rural area; Environmental pollution; Influencing factors; Factor analysis; Hilly area in Sichuan Province; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/113931

Collaborative Performance Analysis and the Establishement of Main body of Agricutlural Technology Innovation
Provedor de dados: 31
Autores: Qiao,   Jin-jie; Zhao,   Qiu-lian.
Relying on the relevant date from China Statistical Yearbook and Chinese Rural Statistical Yearbook, the coolabarative performance of main body of agricutlural technology innovation is evaluated by taking four –power innovation body as the sujects and by estalbishing the index system from the perspectives of inout and output. The results show serious dislocation of main body and bad collabrative performance.  On the basis, the quaternary -parties motivation system cocerning agricutlural enterpises, agricutlural science and technology acanamy, rural hosueholds and governments is established. The system is capable of integrating market, sciencetific reserch and diffusion collection into a whole part and solving the seperation of agricutlural innovation...
Tipo: Journal Article
Palavras-chave: Agricutlural technology innovation; Collabrative; Main body; Performance analysis; Factor analysis; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/113472

Evaluation System for Farmers’ Satisfaction Degree in the Green Energy Saving Rebuilding of Rural Residence
Provedor de dados: 31
Autores: Zhu,   Xiao-dong; Lu,   Mei.
In view of the present situation of measuring a green residence just by energy saving and environmental protection, we propose that we should build the rural residence more from the farmer’s view and set up an evaluation system based on farmers satisfaction. A total of 16 factors affecting the farmers’ satisfaction degree of green energy saving rebuilding of rural residence are selected. Questionnaire survey on 110 peasant households is carried out under different situations in Guanzhong region in Shaanxi Province, so as to obtain the importance score of evaluation index. During constructing the evaluation system for farmers’ satisfaction degree, Factor Analysis Method is used to classify the related influencing factors. Subjective analysis of Analytic...
Tipo: Journal Article
Palavras-chave: Green rebuilding; Farmers satisfaction degree; AHP; Factor analysis; Evaluation model; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/108436

Driving Factors and Model of Change in Arable Land Area in China
Provedor de dados: 31
Autores: Lei,   Zhanbo; Du,   Haowen.
We analyze the characteristics of the change in arable land area in China according to the change data of arable land area and other relevant data from the year 1996 to 2006, and adopt Factor Analysis Method and Stepwise Regression Method to carry out quantitative analysis on the driving factors of arable land change of China. We also establish the regression model of driving factors and arable land area. Finally, some corresponding suggestions are put forward.
Tipo: Thesis or Dissertation
Palavras-chave: Arable land; Driving factor; Factor analysis; Regression analysis; China; Land Economics/Use; Research Methods/ Statistical Methods.
Ano: 2009
URL: http://purl.umn.edu/53592

Iowa Cooperative Fertilizer Retail Outlets: Farmers' Attitudes and Perceptions
Provedor de dados: 31
Autores: Gensch,   Dennis H.
Based on a sample of Iowa farmers, attributes of fertilizer retail dealers are evaluated. Honest management, making deliveries on time, relative size, willingness to negotiate price, and marketing grain are the most important attributes affecting a farmer's decision to patronize an independent or cooperative dealer. Cooperative outlets are generally in a strong competitive position. The study also shows much salient information can be generated by using such statistical methods as segmentation analysis, factor analysis, and the choice model approach.
Tipo: Report
Palavras-chave: Fertilizer; Supply cooperative; Farmers' perception; Dealer attributes; Segmentation analysis; Factor analysis; Choice model; Logit; Agribusiness.
Ano: 1983
URL: http://purl.umn.edu/52018

Comprehensive evaluation on urban competitiveness - A Case of Xinjiang Province
Provedor de dados: 31
Autores: Wan,   Qiu-cheng.
This paper constructs the index system and econometric model of comprehensive evaluation on urban competitiveness, then adopts the factor analysis method to measure the urban competitiveness of 22 prefecture-level cities in Xinjiang Province. The 22 prefecture-level cities are divided into four levels according to the measurement result. Comprehensive analysis of the advantages and disadvantages of the cities in each level is carried out. And related countermeasures and proposals on how to improve the urban competitiveness of the 22 cities are put forward.
Tipo: Thesis or Dissertation
Palavras-chave: Urban competitiveness; Factor analysis; Xinjiang province; China; Community/Rural/Urban Development; Financial Economics; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods; Teaching/Communication/Extension/Profession.
Ano: 2009
URL: http://purl.umn.edu/53483

Defining and Characterizing Approaches to Farm Management
Provedor de dados: 31
Autores: McBride,   William D.; Johnson,   James D.
Exploratory factor analysis was used to identify approaches to farm management based on a list of management questions posed to a sample of U.S. cash-grain farmers.  Three approaches were identified by the factor analysis:  price negotiation, long-term cost control, and input adjustment.  Estimated factor scores regressed against farm and operator characteristics indicate a profile of producers using each approach that is closely related to stage-of-life of the farm operator and farm business.  In addition to operator age and planning horizon, operator risk preference and farm organization and location were other important determinants of the approach to management.
Tipo: Journal Article
Palavras-chave: Cash-grain farms; Factor analysis; Farm management; Latent variables; Management approach; Crop Production/Industries; Farm Management; Labor and Human Capital; Q12; Q10; D21; C40.
Ano: 2006
URL: http://purl.umn.edu/43755

Examination of the value system and food preferences in the institutional catering market in light of primary research carried out in Békés county
Provedor de dados: 31
Autores: Fodor,   Monika.
In my present paper I try to characterise the differences present at the level of food preferences by means of examining the value system as, in my opinion, differences in the value system are reflected in concrete product choices and thus also in food selection. By using factor and cluster analysis I have proven that consumer groups formed alongside the value system also differ regarding food consumption viewpoints. Furthermore, in my paper I also aim to characterise food preference as a determining factor of modes of daily eating. Based on the results, I have concluded that the impact of time-related preferences on food selection can be felt in consumers’ opinions, but cannot be regarded as dominant. In the system of food selection viewpoints, internal...
Tipo: Journal Article
Palavras-chave: Food consumption preferences; Value system; Factor analysis; Cluster analysis; Food Consumption/Nutrition/Food Safety; Research Methods/ Statistical Methods.
Ano: 2008
URL: http://purl.umn.edu/48095

Agriculture and Protection of Landscape Area of the White Carpathians
Provedor de dados: 31
Autores: Krumalova,   Veronika; Backman,   Stefan.
The protected landscape area of the White Carpathians in Czech Republic is confronted with several threats. The protection of the landscape involves instituted policies and restrictions on production. Due to the approaching EU accession and the possible subsequent institutional changes, there is an increased demand for knowledge on production opportunities and threats. In addition there are immediate concerns on the relation between agricultural production and the environment. One major concern is the abandonment of agricultural land. In this article the combination of production elements and protection is described. Factor analyses are used to identify groups of farms with similarities in production structure and organisation. The results of the factor...
Tipo: Working or Discussion Paper
Palavras-chave: Factor analysis; Landscape protection; Livestock production; Policies; Institutions; Land Economics/Use.
Ano: 2003
URL: http://purl.umn.edu/18883

Comparative Research on the Rural Development Levels of 31 Provinces and Regions in China
Provedor de dados: 31
Autores: Xia,   Zheng.
According to the 2010 China Statistical Yearbook, a total of 12 indicators in the aspects of residents’ production, consumption expenditure, and living conditions are selected in order to construct the indicator system of rural development level. Both factor analysis and cluster analysis methods are adopted to compare the current situations of rural development levels in 31 provinces and regions of China. Result of factor analysis shows that the 12 indicators can be classified into 4 factors, such as the income and expenditure factor, the agricultural scale and science and technology factor, the life quality factor, and the agricultural output factor. Moreover, factors affecting the rural development level of China are analyzed. Then, the 31 provinces and...
Tipo: Journal Article
Palavras-chave: Rural development level; Factor analysis; Cluster analysis; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/113416

Evaluation System for Farmers’ Satisfaction Degree in the Green Energy Saving Rebuilding of Rural Residence
Provedor de dados: 31
Autores: Zhu,   Xiao-dong; Lu,   Mei.
In view of the present situation of measuring a green residence just by energy saving and environmental protection, we propose that we should build the rural residence more from the farmer’s view and set up an evaluation system based on farmers satisfaction. A total of 16 factors affecting the farmers’ satisfaction degree of green energy saving rebuilding of rural residence are selected. Questionnaire survey on 110 peasant households is carried out under different situations in Guanzhong region in Shaanxi Province, so as to obtain the importance score of evaluation index. During constructing the evaluation system for farmers’ satisfaction degree, Factor Analysis Method is used to classify the related influencing factors. Subjective analysis of Analytic...
Tipo: Journal Article
Palavras-chave: Green rebuilding; Farmers satisfaction degree; AHP; Factor analysis; Evaluation model; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/108463

THE STRUCTURE OF FARMERS' PERCEPTIONS OF GROUND WATER POLLUTION
Provedor de dados: 31
Autores: Elnagheeb,   Abdelmoneim H.; Jordan,   Jeffrey L.; Humphrey,   Vonda.
Data from a 1992 Georgia Farm Practices survey are used to examine the structure of farmers' perceptions of ground water pollution and their support of regulations to protect ground water. Estimates of the influence of farm and farmer characteristics on pollution perceptions and support for pollution control were computed using a multiple-indicator model. Results show that the willingness to change farm practices to protect ground water is positively related to how an operator perceives the seriousness of the pollution problem. Regulatory policies that negatively affect farmers' income are likely to be opposed by farmers.
Tipo: Journal Article
Palavras-chave: Factor analysis; Latent variable model; Water quality; Environmental Economics and Policy.
Ano: 1995
URL: http://purl.umn.edu/15323

UM RETRATO DA MODERNIZAÇÃO AGROPECUÁRIA NOS COREDES AGRÍCOLAS DO RIO GRANDE DO SUL: UMA APLICAÇÃO DA ANÁLISE MULTIVARIADA
Provedor de dados: 31
Autores: Freitas,   Clailton Ataides; Poerschke,   Rafael Pentiado.
O objetivo do presente estudo é analisar o processo de modernização do setor agropecuário nos COREDES do Rio Grande do Sul que tem sua base econômica vinculada ao setor agrícola. Para tanto, recorre-se à estatística multivariada – Análise de Agrupamentos, Discriminante e Fatorial –, com o intuito de identificar padrões/níveis de modernização da agropecuária nos municípios dos COREDEs agrícolas em 1995/96. Os resultados obtidos apontam para uma forte concentração da agropecuária moderna no grupo formado pelos municípios do COREDE Fronteira Oeste. Contudo, o grupo 2 tem uma situação mais estável e, o grupo 3 demonstrou sinais de transição da agricultura mais tradicional para um padrão diferenciado, caracterizado pela inovação. Por fim, há um quarto grupo, de...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultura; Análise fatorial; Conselhos Regionais de Desenvolvimento; Agriculture; Factor analysis; Regional Development Councils; Farm Management.
Ano: 2008
URL: http://purl.umn.edu/106122

Evaluation on Development Level of Rural Circular Economy in Hebei Province, China
Provedor de dados: 31
Autores: Guo,   Ping; Sun,   Wen-sheng.
According to availability of rural data, and the actual situation of economic development in different areas, 1 first grade index, 2 grade indices and 20 third grade indices are selected to establish the measurement index system of circular economic development level in rural areas. According to the relevant data, standardized processing of data is conducted. Evaluation on circular economic level in Hebei Province by Factor Analysis indicates that comprehensive score of Shijiazhuang, Qinghuangdao and Tangshan Cities is the highest, that of Xingtai, Handan, Langfang, Baoding, Cangzhou Cities is at a medium level, and that of Hengshui, Chengde and Zhangjiakou is the lowest. Meanwhile, cluster analysis on data after standardization shows that Handan, Baoding,...
Tipo: Journal Article
Palavras-chave: Rural circular economy; Factor analysis; Cluster analysis; China; Agribusiness.
Ano: 2009
URL: http://purl.umn.edu/93450

The role of grazier motivations and risk attitudes in the adoption of grazing best management practices
Provedor de dados: 31
Autores: Greiner,   Romy; Miller,   Owen; Patterson,   Louisa.
The onus on landholders in relation to environmental performance is ever increasing. One tool for achieving environmental improvements is the design and promotion of region-specific ‘best management practices’ (BMPs). These are conservation practices aimed at reducing diffuse source pollution from agricultural lands and thus improving end-of-catchment water quality. A suite of grazing BMPs were developed for the Burdekin Dry Tropics region in a consultative fashion but without explicit consideration of knowledge of adoption processes. It is known from the literature that farmers’ goals and risk perceptions in particular influence adoption decisions. This paper utilises the data from an earlier grazier survey to explore to what extent grazier motivations...
Tipo: Conference Paper or Presentation
Palavras-chave: Conservation practices; Adoption; Water quality; Grazing; Burdekin River catchment; Best management practices; Risk management; Motivations; Empirical research; Correlations; Factor analysis; Environmental Economics and Policy; Farm Management; Risk and Uncertainty.
Ano: 2008
URL: http://purl.umn.edu/6002

Perceptions of PDO Beef: The Portuguese Consumer
Provedor de dados: 31
Autores: Marreiros,   Cristina; Ness,   Mitchell.
The objectives of this paper are to examine consumers' perceptions of Protected Designation of Origin (PDO) beef on the basis of a survey of consumers and buyers of beef. The paper identifies a profile of PDO beef consumers, examines their behaviour and perceptions on PDO beef, derives the dimensions of perceptions of PDO beef, and establishes segments based upon those dimensions. The results reveal that PDO consumers are representative of all geographical regions, age and profession groups, are lighter consumers of beef and shop for food mainly in the butchers. Consumers' perceptions on PDO beef emphasises quality, safety, and control. However, underlying those perceptions are six main dimensions and it is possible to identify three segments of PDO beef...
Tipo: Conference Paper or Presentation
Palavras-chave: Protected designations of origin; Beef; Perceptions; Factor analysis; Cluster analysis; Consumer/Household Economics.
Ano: 2002
URL: http://purl.umn.edu/24869

Chinese Consumers' Preferences for Livestock Products
Provedor de dados: 31
Autores: Peng,   Xuehua; Marchant,   Mary A.; Qin,   Xiang Dong; Zhuang,   Jun.
This research surveyed over 784 Chinese consumers in Shanghai and Nanjing in 2001 and 2002, evaluating their preferences for livestock product attributes using ordered-probit models and factor analyses. Empirical results confirm the heterogeneity of Chinese livestock retail markets and suggest that livestock distributors should focus on Chinese female consumers and young consumers considering cooking convenience as a key attribute. Chinese consumers with higher incomes placed less importance on product price and shopping environment and more importance on product quality and brand name. Highly-educated Chinese consumers placed more importance on the brand name attribute. Our findings also indicate that it is crucial for U.S. livestock exporters to create...
Tipo: Journal Article
Palavras-chave: China; Factor analysis; Livestock products; Ordered-probit model; Consumer/Household Economics; Livestock Production/Industries.
Ano: 2005
URL: http://purl.umn.edu/8134

Does land tenure security matter for investment in soil and water conservation? Evidence from Kenya
Provedor de dados: 31
Autores: Kabubo-Mariara,   Jane; Linderhof,   Vincent; Kruseman,   Gideon.
This paper investigates the impact of tenure security and other factors on investment in soil and water conservation (SWC) in Kenya. Factor analysis, step-wise regression and reduced form model approaches are used to explain the willingness, likelihood and intensity of adoption of SWC investments. The results confirm the importance of tenure security and development domain dimensions in determining the likelihood and intensity of adoption and suggest that to ensure land tenure policy is pro-SWC/environment, it is important to consider whether household plots are owned, rented out or rented in. The impact of household assets implies a poverty environment link. Similar factors affect the decision whether or not to invest in SWC and also the level of...
Tipo: Journal Article
Palavras-chave: Soil and water conservation; Tenure security; Development domains; Factor analysis; Land Economics/Use.
Ano: 2010
URL: http://purl.umn.edu/93863

A munkahelyi étkezés hazai fogyasztói piacának vizsgálata
Provedor de dados: 31
Autores: Fodor,   Monika; Gyenge,   Balazs; Horvath,   Agnes.
Tanulmányunkban 1000 fős országos felmérés eredményei alapján azonosítottuk a hazai munkahelyi étkezés fogyasztói szegmenseit. Bebizonyítottuk, hogy a célcsoportok szocio-demográfiai ismérvek mellett az étkezési és élelmezési szokások, a munkahelyi étkezéshez való viszony szerint is eltéréseket mutatnak, amely igazolja, hogy ezen ismérvek befolyásolják az egyént abban, hogy milyen munkahelyi étkezési formát választ. Megállapítható, hogy a munkahelyi étkezés igénybevétele leginkább az időtudatos élelmiszer-fogyasztói magatartással függ össze, de megjelennek a kényelem, a termékminőség és a kiegészítő szolgáltatások iránti fogyasztói elvárások is. Az eredmények segítséget jelenthetnek a piacfejlesztési, piacbővítési lehetőségek definiálásában és a célpiaci...
Tipo: Article
Palavras-chave: Munkahelyi étkezés; Faktoranalízis; Klaszteranalízis; Institutional catering; Factor analysis; Cluster analysis; Consumer/Household Economics; Marketing.
Ano: 2011
URL: http://purl.umn.edu/119924

Development of County Economy in Hubei Province Based on Factor Analysis
Provedor de dados: 31
Autores: Feng,   Jian-zhong; He,   Xian-ping.
According to the 2008 Statistics Bulletin of the National Economic and Social Development of Hubei Province, factor analysis method is used to study on the development of county economy in Hubei Province. Result shows that there are great differences in the economic development and the development is imbalanced. The 76 counties (cities, districts) in Hubei Province are divided into three types of  &gt;1,   and , that is, areas with relatively developed county economy, areas with medium developed county economy and areas with less developed county economy. Finally, countermeasures to accelerate the development of county economy are put forward, such as adhering to the reform of market economy, developing private economy, speed up the process of...
Tipo: Journal Article
Palavras-chave: County economy; Factor analysis; Factor score; Hubei Province; China; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/102392

Irrigation with domestic wastewater: a multivariate analysis of main soil changes
Provedor de dados: 90
Autores: Gloaguen,Thomas Vincent; Gonçalves,Roberta Alessandra Bruschi; Forti,Maria Cristina; Lucas,Yves; Montes,Célia Regina.
Irrigation with treated domestic sewage wastewater (TSE) is an agricultural practice to reduce water requirements of agroecossystems and the nutrient load impact on freshwaters, but adverse effects on soil chemical (salinization, sodification, etc.) and soil physical properties (alteration in soil porosity and hydraulic conductivity, etc.) have been reported. This study aimed to define some relationships among these changes in an Oxisol using multivariate analysis. Corn (Zea mays L.) and sunflower (Helianthus annuus L.) were grown for two years, irrigated with TSE. The following soil properties were determined: Ca2+; Mg2+; Na+; K+ and H + Al contents, cationic exchangeable capacity (CEC), sum of bases (SB), base saturation (V), texture (sand, silt and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil porosity; Soil sodicity; Factor analysis.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400038

Geochemistry and Spatial Variability of Rare Earth Elements in Soils under Different Geological and Climate Patterns of the Brazilian Northeast
Provedor de dados: 90
Autores: Silva,Cinthia Maria Cordeiro Atanázio Cruz; Barbosa,Ronny Sobreira; Nascimento,Clístenes Williams Araújo do; Silva,Yuri Jacques Agra Bezerra da; Silva,Ygor Jacques Agra Bezerra da.
ABSTRACT Growth in the agricultural and industrial sectors has increased the demand for rare earth elements (REEs) in the production of technological devices and fertilizers. Thus, the accumulation of these elements in the soil has become an environmental concern. Here, we aim to determine the natural contents of REEs in soils derived from different parent materials and under climatic conditions ranging from humid to semi-arid. We then evaluate the influence of major elements and soil properties on the geochemistry of REEs. The contents of REEs were determined using inductively coupled plasma optical emission spectroscopy. Major elements were determined by X-ray fluorescence spectrometry. The mean content of REEs in soils from Rio Grande do Norte (RN),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural contents; Lanthanides; Geostatistics; Factor analysis; Soil quality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100524

PREVENTION OF CHILLING INJURY IN 'TOMMY ATKINS' MANGOES PREVIOUSLY STORED AT 5 ºC, USING HEAT TREATMENT AND RADIATION UV (UV-C)
Provedor de dados: 94
Autores: MIGUEL,ANA CAROLINA ALMEIDA; DURIGAN,JOSÉ FERNANDO; MARQUES,KELLY MAGALHÃES; MORGADO,CRISTIANE MARIA ASCARI; FERRAUDO,ANTONIO SERGIO.
ABSTRACT  The objective of this study was to evaluate the effect of heat treatment and ultraviolet radiation (UV-C) in the prevention of chilling injury in mangoes cv. Tommy Atkins previously stored or not under injury condition after their transference to ambient condition. Fruits were divided into groups: two were hydrothermally treated (46.1 ºC/90 min; 55 ºC/5 min) and two were exposed to UV-C radiation (1.14 kJ m-2; 2.28 kJ m-2). These groups were stored under chilling injury conditions (5 ºC for 14 days), as established in preliminary tests. Other untreated groups were stored at 12 ºC or 5 ºC. After the storage period, they were transferred to ambient conditions (21.9 ºC; 55% RH) and the quality was evaluated. All the data were submitted to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mangifera indica; Ultraviolet radiation; Thermal treatment; Factor analysis; Cluster analysis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000100053

Identification of risk factors affecting production of beekeeping farms and development of risk management strategies: A new approach
Provedor de dados: 96
Autores: Karadas,Koksal; Birinci,Avni.
ABSTRACT The aim of this investigation was to determine risk factors affecting production of beekeeping farms in Igdir province of Turkey and to develop strategies in coping with these risks. Research was based on data collected through a questionnaire applied to 85 beekeeping farms registered to Igdir Beekeepers’ Union according to exact counting method. Factor analysis was applied to collected data to identify risk factors and risk management strategies. Factor analysis was conducted under principle component extraction method and VARIMAX rotation. A stepwise regression analysis was used to reveal the relationship between each of four strategy factors and eight risk factors. As risks in procuring labor occur, farmers are more likely to adopt modern...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apiculture; Approach; Factor analysis; Production economics; Uncertainty.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100702

Characteristics of the dairy farmers who perform financial management in Paraná State, Brazil
Provedor de dados: 96
Autores: Zimpel,Roney; Bánkuti,Ferenc Istvan; Zambom,Maximiliane Alavarse; Kuwahara,Kellen Cristina; Bánkuti,Sandra Mara Schiavi.
ABSTRACT The objective of this paper was to analyze financial management practices in dairy production systems. More specifically, we sought to identify which milk producers adopt financial management practices. We conducted 55 semi-structured questionnaires in the Western Region of Paraná. The data were processed through descriptive and multivariate statistical analysis. The analysis of hierarchical clusters defined, based on variables related to financial management practices, two distinct groups. The first group included milk producers who do not adopt financial management practices (N = 49) and the second group described the milk producers who do adopt these practices (N = 6). We then used Common Factor Analysis, along with structural, technical,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cluster; Costs; Factor analysis.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000500421

Developing a Soil Physical Quality Index (SPQi) for lowlands under different deployment times of no-tillage
Provedor de dados: 63
Autores: Reis,Diony Alves; Lima,Claudia Liane Rodrigues de; Bamberg,Adilson Luís.
ABSTRACT: Soil physical quality in lowlands from the Pampa biome under no-tillage (NT) plays an important role; therefore, this study aimed to establish a soil physical quality index (SPQi) from a minimum data set to detect the effects of different deployment times of NT in an Albaqualf. The comparison of areas with one (NT1), three (NT3), five (NT5) and seven (NT7) years of notillage was established using as reference a non-cultivated field plot (NC) for at least thirty years, nearby the sites under NT. Soil samples with undisturbed and disturbed structure were collected to determine the physical quality indicators and soil organic matter (SOM) fractions. The factor analysis (FA) was used to identify and select a minimum data set. The SPQi was elaborated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Factor analysis; Minimum data set; Management systems; Lowland soils.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001200157

Wheat seedling emergence estimated from seed analysis
Provedor de dados: 63
Autores: Boligon,Alexandra Augusti; Lúcio,Alessandro Dal'Col; Lopes,Sidinei José; Cargnelutti Filho,Alberto; Garcia,Danton Camacho.
There are various vigor tests for the evaluation of seeds physiological quality, however, few studies correlate this tests with plants emergency. This study aimed at identifying wheat (Triticum aestivum L.) seed analysis variables that best predict seedling emergence. Wheat seeds (CEP 30 cultivar) were divided into two batches, one initially subjected to the accelerated ageing process and forming the low-quality batch, and the other, without application of the accelerated ageing process, to compose a high-quality batch. The following seed test variables were evaluated: (i) percentage of normal seedlings in the germination tests, (ii) initial germination counting, (iii) accelerated ageing, (iv) cold test without soil, (v) germination speed index, and (vi)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stepwise multiple regression analysis; Path analysis; Factor analysis; Seed quality.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300010

Relationship of total bacterial and somatic cell counts with milk production and composition – multivariate analysis
Provedor de dados: 2
Autores: Botton, Fernanda Scolari; Alessio, Dileta Regina Moro; Busanello, Marcos; Schneider, Catia Letícia Corrêa; Stroeher, Fernanda Hammes; Haygert-Velho, Ione Maria Pereira.
 This study was realized to evaluate the monthly production, composition and quality of milk (total and defatted dry extract, lactose, fat and protein) and their relation to somatic cell count (SCC) and total bacterial count (TBC) using multivariate statistical analyses. The data are from a dairy farm for the period of two years (from January 2015 to December 2016). The SCC and TBC variables were transformed to somatic cell score (SCS) and log10 (LogTBC). Factor analysis, discriminant analysis and cluster analysis were used. Through factor analysis, it was found two factors that together explained 69.5% of the total data variation. The first factor represented the inverse relationship between lactose versus fat and protein content, while the second factor...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zootecnia; Produção de ruminantes; Manejo animal cluster analysis; Factor analysis; Bos taurus; Fat; Lactose; Protein.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42568

Validation and application of a measurement scale on environmental practices for high school teachers in Patos, Paraíba
Provedor de dados: 3
Autores: Silva, Edevaldo; Soares, Delyane Lima; Olveira, Habyhabanne Maia; Vieira, Humarah Danielle Guedes.
 The objective was to create, validate and apply a measurement scale on environmental practices for teachers of various educational areas (exact sciences, humanities, natural sciences and Portuguese), from six public high schools in the city of Patos, Paraíba. To that end, it was created a questionnaire related to the topic, consisting of 24 items in the Likert scale model, being statistically validated as its consistency and reliability by factor analysis and by the α-Cronbach’s test. The assessed measurement scale has been validated (n = 34) with the exclusion of five items, getting excellent α-Cronbach’s coefficient (0.95). In the application of the questionnaire (n = 68), most teachers had social and environmental practices little consistent with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 92700004; 7.08.00.00-6 ecological attitude; Environmental education; Factor analysis; Teachers 92700004; 7.08.07.00-0.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31561

Solutions for fast development of precision agriculture in Iran
Provedor de dados: 111
Autores: Bagheri, Nikrooz -; Bordbar, Marzieh.
A descriptive survey method was carried out to assess to effective factors on precision agriculture (PA) adoption and to find out practical solutions for development of PA in Iran.  The research population included 450 people from agricultural specialists, experts, researchers.  A sample of 117 was constituted using proportional stratified sampling based on the Cochran formula.  Data were collected using questionnaire.  The questionnaire was validated by a panel of experts, and the reliability index was established by a Cronbach's coefficient.  Computed Cronbach’s alpha score obtained 81%.  All survey data were analyzed using the Statistical Package for Social Sciences (SPSS 16.0).  The most important solutions for development of PA in Iran were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural extension; Precision agriculture; Agricultural management adoption; Factor analysis; Precision agriculture; Solution.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2716

Factor analysis of agricultural mechanization challenges in Iran
Provedor de dados: 111
Autores: Bagheri, Nikrooz -; Bordbar, Marziyeh.
A descriptive survey research was undertaken in order to assess challenges facing agricultural mechanization development in Iran.  The research population included agricultural mechanization experts, managers and specialists in private and governmental sections.  Using proportional stratified sampling, a sample of 119 was constituted out of a total population of 809 based on the Cochran formula.  Data were collected using questionnaire on which the statements were collected after literature review of research and interviews with mechanization specialists.  The questionnaire was validated by a panel of experts and its reliability index was established by a Cronbach’s coefficient.  A pilot study was conducted with 30 questionnaires (not included in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Machinery; Agricultural Mechanization Agricultural mechanization; Challenge; Factor analysis; Questionnaire.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2598

Study of wet precipitation and its chemical composition in South of Brazil
Provedor de dados: 42
Autores: Teixeira,Elba C.; Migliavacca,Daniela; Pereira Filho,Sadi; Machado,Andréa C.M.; Dallarosa,Juliana B.
The purpose of this study is to analyze the chemical composition of wet precipitation in samples collected at three stations in the Candiota region in the Brazilian state of Rio Grande do Sul (RS). Samples were collected in 2004. Variables analyzed in wet precipitation were pH, conductivity, and concentration of Cl-, NO3-, SO4(2-) F-, Na+, Ca2+, Mg2+, K+, NH4+, Cu, Zn, Fe, Mn, Pb, Ni, Cd, Co, and Cr. SO2 and NO2 distribution over the time were also evaluated. Results have showed that pH &lt; 5.6 are found mostly at Candiota airport (85%), followed by Aceguá (72%) and Três Lagoas (65%). Enrichment Factor of the studied ions in wet deposition revealed higher Ca2+ and SO4(2-) enrichment in Três Lagoas. Factor Analysis applied to metals and major ions allowed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wet precipitation; Metals; Factor analysis.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000200016

Multivariate analysis reveals key traits of fall armyworm resistance in tropical popcorn genotypes
Provedor de dados: 53
Autores: Sanches,Rafael Egea; Suzukawa,Andréia Kazumi; Contreras-Soto,Rodrigo Iván; Rizzardi,Diego Ary; Kuki,Mauricio Carlos; Zeffa,Douglas Mariani; Albuquerque,Fernando Alves de; Scapim,Carlos Alberto.
ABSTRACT In the present study it is hypothesized that the germplasm of popcorn of tropical regions shows resistance to FAW, and the multivariate analysis can characterize the main traits of this resistance. Thus, the aim of this study was to identify key traits used to select fall armyworm resistance in popcorn by using factor and cluster analyses. Sixteen biological traits were evaluated at larval and pupae stages: total number of armyworm, time larval period, final mass of caterpillars, total mass of caterpillars, mean mass of caterpillars, pupae period, mass of pupae and some indices used to evaluate the food consumed by the caterpillars. Multicollinearity diagnosis, factor and canonical analysis, and the genetic divergence among the genotypes were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spodoptera frugiperda; Zapalote Chico; Larval period; Factor analysis; Manova.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000200175

Validity and reliability of the 36-Item Short Form Health Survey questionnaire version 2 among people living with HIV in Brazil
Provedor de dados: 55
Autores: Lins-Kusterer,Liliane; Valdelamar,Juliet; Aguiar,Carolina Villa Nova; Menezes,Marta Silva; Martins Netto,Eduardo; Brites,Carlos.
ABSTRACT  Background: The 36-Item Short Form Health Survey questionnaire (SF-36) is a widely used instrument for evaluating health-related quality-of-life (HRQoL). The psychometric validation of the SF-36 version 2.0 (SF-36v2) in HIV-infected patients had not yet conducted in Brazil.  Aim: To test data quality, reliability and validity of the SF-36v2 as a measure of HRQoL among Brazilian individuals living with HIV.  Methods: A cross-sectional study included 393 HIV-infected patients in whom HRQoL was assessed by using the SF-36v2 questionnaire. Demographic characteristics, socioeconomic status and clinical data were also collected. The SF-36 version 1 translated into Brazilian-Portuguese was adapted and introduced version 2 improvements according to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HIV; Health-related quality of life; Factor analysis; Validation studies.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702019000500313

Validation of the Beck Depression Inventory for a Portuguese-speaking Chinese community in Brazil
Provedor de dados: 56
Autores: Wang,Y.-P.; Andrade,L.H.; Gorenstein,C.
The objective of the present study was to investigate the psychometric properties and cross-cultural validity of the Beck Depression Inventory (BDI) among ethnic Chinese living in the city of São Paulo, Brazil. The study was conducted on 208 community individuals. Reliability and discriminant analysis were used to test the psychometric properties and validity of the BDI. Principal component analysis was performed to assess the BDI's factor structure for the total sample and by gender. The mean BDI score was lower (6.74, SD = 5.98) than observed in Western counterparts and showed no gender difference, good internal consistency (Cronbach's alpha 0.82), and high discrimination of depressive symptoms (75-100%). Factor analysis extracted two factors for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Depressive symptoms; Beck Depression Inventory; Psychometric properties; Validation of Depression Inventory; Portuguese-speaking Chinese; Factor analysis.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000300011

Dimensionality of the premenstrual syndrome: confirmatory factor analysis of premenstrual dysphoric symptoms among college students
Provedor de dados: 56
Autores: Wang,Y.-P.; Teng,C.-T.; Vieira Filho,A.H.G.; Gorenstein,C.; Andrade,L.H.
Premenstrual syndrome and premenstrual dysphoric disorder (PMDD) seem to form a severity continuum with no clear-cut boundary. However, since the American Psychiatric Association proposed the research criteria for PMDD in 1994, there has been no agreement about the symptomatic constellation that constitutes this syndrome. The objective of the present study was to establish the core latent structure of PMDD symptoms in a non-clinical sample. Data concerning PMDD symptoms were obtained from 632 regularly menstruating college students (mean age 24.4 years, SD 5.9, range 17 to 49). For the first random half (N = 316), we performed principal component analysis (PCA) and for the remaining half (N = 316), we tested three theory-derived competing models of PMDD by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Premenstrual dysphoric disorder; Premenstrual syndrome; Dysphoria; Factor analysis; Psychometric properties.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000500006

Psychometric properties of the Portuguese version of the State-Trait Anxiety Inventory applied to college students: factor analysis and relation to the Beck Depression Inventory
Provedor de dados: 56
Autores: Andrade,L.; Gorenstein,C.; Vieira Filho,A.H.; Tung,T.C.; Artes,R.
The psychometric properties of the Portuguese version of the trait form of the State-Trait Anxiety Inventory (STAI-T) and its relation to the Beck Depression Inventory (BDI) were evaluated in a large Brazilian college student sample containing 845 women and 235 men. STAI-T scores tended to be higher for women, singles, those who work, and subjects under 30 years. Factor analysis of the STAI-T for total sample and by gender yielded two factors: the first representing a mood dimension and the second being related to worrying or cognitive aspects of anxiety. In order to study the relation between anxiety and depression measures, factor analysis of the combination of the 21 BDI items and the 20 STAI-T items was also carried out. The analysis resulted in two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Strait-Trait Anxiety Inventory; Factor analysis; Psychometric properties; Beck Depression Inventory; Students.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000300011