Ograniczanie wyników

Czasopisma help
Autorzy help
Lata help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 25

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  factor analysis
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
Evaluation of the influence of leachate on underground waters in the vicinity of a chosen landfill is examined in this paper. The purpose of the research was to give information on maximum pollutants concentrations which could penetrate ground and water subsoil and its influence on the area adjacent to the landfill. Scale and range of pollution in the examined area have been observed in 7 piezometer test wells and 4 nearest household wells and analogous parameters have been determined for leachate. To evaluate the influence of leachate on examined ground waters a method of multidimensional factor analysis with Varimax rotation was used.
The purpose of research is to analyze selected social indicators of rural sustainable development in the EU Member States in 2000-2012, and to determine their main tendencies. To describe those tendencies and changes that took place in rural areas, the factor analysis has been implemented. Three main factors have been worked out to determine the synthetic index (SI) of social development of rural areas of the EU Member States. It enabled the authors to affirm that the leading EU countries in terms of social development are Luxemburg, Denmark, the Netherlands, Belgium and Sweden, those among the least developed are the countries, which joined the EU after two last waves of its enlargement, namely Croatia, Latvia, Lithuania, Poland and Romania. The main reasons for such a differentiation are the quality of rural life related problems: rural poverty due to low incomes, great dependence on agriculture, depopulation, poor infrastructure etc.
The research embraced 9339 people aged 13-75, living in the 6 macro-regions of Poland. The preferences and the consumption frequency for the chosen products and their groups and the choice importance of factors influencing the food choice were evaluated. On the basis of the factor analysis (the main components method) and the cluster analysis (the k-means method) the characteristic profiles describing the food choice models were selected. The existence of 6 profiles describing people dietary behaviours were revealed. Food choice was influenced to a larger extent by sensory and functional factors rather than by socio-cultural, concerning health factors or price. The health-concerning factors differentiated studied population, nevertheless, they had a moderate meaning for the food choice.
Application of a complex assessment of landslide hazards in mountain regions. The main regional factors of occurrence and activation of landslides within the mountain region were examined. As a result of study of recommendations made by experts, geologists, and gap analysis of existing methods of forecasting the landslide process, an algorithm of comprehensive assessment of landslide hazard areas based on the construction of models in a GIS environment was proposed. These models describe the spatial patterns of landslides. All factors determining the tendency of the studies area to the landslide process development were divided into actual factors, reflecting the regional peculiarities of the territory and forming the landslide-prone slopes (static model), as well as triggering factors, initiating the landslide process and determining its activity (dynamic model). The first cartographic model was built, showing the distribution of the deterministic indirect indicator of landslide hazard, i.e. stability index.
The study focused on identifying hygienic lifestyle factors related to different nutritional status (NS) of free living people. 12 anthropometrical parameters characterizng NS of the group of 271 students (♀: 144, ♂- 127), selected from local University, were used in cluster analysis for indicating homogenous cluster groups ("slim", "medium", "fat"). As factors representing hygienic lifestyle there were considered: composition of diet (12 factors) and level of physical activity - PA (2 factors). The most important factor influencing NS was dietary supply of energy, macronutrients (especially plant protein) and food fiber and in lower extent level of physical activity.
The long bones (humerus, radius, metacarpus, femur, tibia, metatarsus) of 51 extant bovid and 7 equid specimens were measured in order to test the hypothesis that they show adaptations to different habitats. We performed factor analyses (FAs) with principal component extraction method and plotted the extracted factors (Fs) in simple scatterplots. The preferred habitats (grassland, forest, mountainous regions) were labeled in the plots, and our results show three clearly separated clusters for F2 vs. F3. According to our interpretation, F1 reflects the body size of the specimens while F2 is most probably reflecting cursorial adaptations. F3 is largely affected by dimensional bone characteristics adapted to maneuver in the environment, and therefore, F3 is somehow linked to habitat. The investigated equids are plotting within the cluster of bovids preferring grassland habitats, which is surprising because of different constructions of the metapodials in perissodactyls and ruminants. Performed linear discriminant analyses (LDAs) are supporting our FA results. This approach combines biometrics with statistics and presents a tool, which easily can be applied helping to identify the paleo-habitat or the paleo-ecology of extinct bovids with implications on fossil localities.
In four consecutive seasons along 9 stations, water parameters such as TDs, pH, temperature, DO, BOD, COD, TOC, TP, NH₄⁺, TN and NO₃⁻ were determined on the siahroud River southwest of the Caspian sea in northern Iran. The results indicated higher TDS values in some parts of the river due to the agriculture and residential activities. The addition of ammonia fertilizers in the paddy fields is one of the major causes for the higher NH₄⁺ in the downstream sites. Total phosphorous (TP) and total nitrogen (TN) levels in the river were mainly in the organic forms. Factor analysis showed that agriculture and urban activities were the major pollutant sources. Four zones were identified by cluster analysis, suggesting local pollution sources or the accumulation of pollution effects downstream.
Wielkość strat, wynikających z zastosowania kombajnów zbożowych ma ogromne znaczenie ekonomiczne, szczególnie gdy rozpatruje się je w skali całego kraju. Są to straty bezpośrednie (ilościowe) i pośrednie (jakościowe). Straty te mają szczególne znaczenie w przypadku zbioru materiału siewnego, gdyż uszkodzenia mogą znacznie obniżyć jakość ziarniaków. Celem pracy było wykazanie, które z czynników w sposób istotny oddziaływują na wielkość strat w czasie zbioru kombajnem. Do tego możliwe było wykorzystanie metod jakie udostępnia nam analiza czynnikowa. Wyniki badań dotyczące wpływu czynników mających wpływ na wielkość strat w czasie zbioru kombajnem zebrano w tabelach. Są one rezultatem badań różnych autorów zajmujących się tą problematyką. Przeprowadzono analizę czynnikową, która dała odpowiedź na pytanie, jakie czynniki są nieistotne przy powstawaniu strat w czasie zbioru kombajnem.
Background. Dietary patterns (DPs) are defined as the amounts, types and combinations of various food products in habitual diets and the frequency of their consumption. Dietary pattern analysis is usually performed in order to assess the combined effect of consumed food products on health. Objective. The aim of the study was to assess and compare the nutritional value of dietary patterns identified in a group of patients staying on the oncological ward. Material and methods. The study group consisted of 100 patients (51 women and 49 men) aged 19-83 years. Dietary intake was assessed using a food frequency questionnaire (FFQ) validated for the population of Lower Silesian Voivodeship. Results. Factor analysis identified two main dietary patterns explaining 25.6% of variance. The “fruit and vegetables” DP consisted of vegetables, fruits, juices, unrefined grains and nuts, seeds and raisins. Instead, the “Western” DP was characterized by the consumption of high-fat and processed meat and poultry, fried fish, refined grains, honey and sugar, fats, sweets, beverages and chips. While higher scores for “fruit and vegetables” pattern were associated with increased intake of dietary fiber, antioxidant vitamins, folic acid and decreased glycemic load per 1000 kcal and sodium intake, for “Western” pattern observed relationships were opposite. Women were more likely to have higher factor scores for “fruit and vegetables” DP and lower factor scores for “Western” DP than men. Conclusions. Dietary patterns identified in the study group differed in terms of nutritional value, in spite of similar macronutrient content in the diet. “Western” DP was characterized by lower nutritional value than “fruit and vegetables” dietary pattern.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.