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Correlations Between Aggregate Particle Shape Parameters and Size Based on Images Captured Using a 3-D Laser Scanning Device

Abstract

Three dimensional (3-D) laser scanning has recently proved to be an ideal technique for quantifying aggregate particle shape parameters. This is because 3-D laser scanners measure fine details and capture free-form shapes. This paper presents some results of an on-going study, which utilises 3-D laser scanning technology to quantify aggregate shape parameters. Specific correlations and shape parameters have been considered. The results have shown that meaningful correlations exist between 3-D sphericity and aspect ratio as well as between specific surface area and the particle diameter as defined in this paper. The results of the current study are consistent with generally accepted relationships between shape parameters and particle size, further validating the application of the 3-D laser scanning technology

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Assessment of the impact of climate change on the freshwater availability of Kaduna River basin, Nigeria

parameters in the northern basement complex, Nigeria. Civil and Environmental Research. Vol. 3. Iss. 7 p. 11–19. I man R.L., H elton J.C. 1988. An investigation of uncertainty and sensitivity analysis techniques for computer models. Risk Analysis. Vol. 8. Iss. 1 p. 71–90. DOI 10.1111/j.1539-6924.1988.tb01155.x K endall M.G. 1975. Rank correlation methods. 4th ed. Charles Griffin, London, U.K. ISBN 0852641990 pp. 202. K undu S., K hare D., M ondal A. 2016. Future changes in rainfall, temperature and reference evapotranspiration in the central India

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Consistency or contradiction? Mobility-Related Attitudes and Travel Mode Use of the Young ‘New Generation’

all 0% 12% 4% 15% 88% n 1,273 1,273 1,273 1,273 1,273 3.3 Methods Depending on the scale level of the variables, we calculate Spearmans Rho as a measure of correlation. These correlations between attitudes and travel mode use are compared between the categories of differentiating features (spatial context, budget and life stage) by means of a Z-transformation according to Fisher. This tests whether the correlations differ significantly. At this point, we avoid multivariate methods in order to place the relationship between

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Effect of Aggregate Gradation on the Stiffness of Asphalt Mixtures

Abstract

Aggregate gradation plays an important role in the behaviour of asphalt mixtures. Packing of aggregate is a very important factor that will be affected by changing the aggregate gradation. Many researchers have investigated different ways of describing packing both theoretically and practically. Bailey ratios have recently been used to understand the volumetric properties of mixtures. In this paper, the Bailey ratios have been used, and two further ratios have also been introduced to allow the asphalt mixture gradation to be fully understood. Thirteen different aggregate gradations have been chosen within the 14 mm asphalt concrete specification to investigate the effect of particle size distribution on the stiffness of the mixture. It was found that variation in aggregate gradation has a significant effect on asphalt stiffness, even within specification limits, and a reasonable correlation between the set of ratios investigated and the Indirect Tensile Stiffness.

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Land-management strategies and the detached housing stock in shrinking municipalities – evidence from Germany

approximately 7% by 2060, even assuming stronger immigration. https://www.destatis.de/DE/Themen/Gesellschaft-Umwelt/Bevoelkerung/Bevoelkerungsvorausberechnung/_inhalt.html Thus, the municipalities are obviously aware of their specific population development. This information was, on the one hand, necessary to test an assumed correlation between population development and land management strategy and, on the other hand, to divide growing and declining municipalities in the further analysis. Moreover, local demographics are accompanied by increasing regional polarisation, e

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Recent Challenges of the Ecosystems Services Approach from an Interdisciplinary Point of View

-being”. – Analysis of trade-offs among the different ecosystem services and the beneficiaries of these services, respectively. As stated by Howe, Suich, Vira et al. (2014) , Martinez-Harms, Bryan, Balvanera et al. (2015) and Lautenbach, Mupepele, Dormann et al. (2019) , most of the trade-off studies apply rather simple (static) approaches, like correlation or map overlay analyses of selected ecosystem services, while more complex ones that also consider interactions and interdependences between certain ecosystem services and their dynamics are still rare. Moreover, according

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Quantification of Suspended Sediment Load by Double Correlation in the Watershed of Chellif (Algeria)

Abstract

The sediment transport in rivers in Algeria is very high. However, it is poorly quantified in some wadis because of the absence and the shortage of data especially the concentration of fine particles and also the unavailability of gauging stations. To fill this gap, a technique for estimating sediment yield, based on data recorded at the gauging station has been developed. The estimation of suspended sediment yield was conducted by a statistical analysis with double correlation on average daily flow and solid concentrations. The results obtained by applying this model to the watershed Chellif are very encouraging because the correlation coefficients of the found models are between 61% and 91% for the first correlation and between 86% and 97% for the second correlation. The estimated quantity of suspended sediment load is between 2.35 and 4.12 million tonnes per year, it appears important; This is due to the vulnerability of the Chellif basin facing erosion, the importance of its area and the importance of fluid flows in wadi Cheliff and its torrential regime. Mention here some of the results and their significance to the study.

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A Correlational Study on Project Management Methodology and Project Success

Abstract

This non-experimental correlational study extends previous research investigating the relationship between project management methodology and reported project success, as well as the moderating variables of industry and project manager experience. The sample included North American project managers with five years’ experience, 25 years of age or older, and experience with multiple project management methodologies. The survey instrument consisted of 58 questions, utilizing a 5-point Likert scale to record responses. The survey contained three sections, including demographic information, questions related to a successful project, and questions related to a less-than successful (failed / challenged) project. 367 usable responses were received. The examination of the constructs included Pearson’s correlation coefficient as well as linear regression to determine the impact of moderating variables. Results indicated that project management methodology has a weak correlation with reported project success, and this correlation is not moderated by industry nor project manager experience. The results did not align with previously conducted studies, illustrating a need to continue the study of methods impacting success including investigating additional moderating variables.

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Crime in Lithuanian Cities in Relation to Urban Planning and Design Aspects

Abstract

Crime is a social phenomenon, which is closely related to human behaviour, economics, urban planning and design. The detailed research of six blocks of houses in three Lithuanian cities (Kaunas, Vilnius and Panevezys) with the highest crime rates and the most heterogeneous crimes was performed. Space syntax method, crime prevention through environmental design (CPTED) and correlation analysis were applied. Research results demonstrate that thefts from cars, other thefts, crime against human health, robberies, small-scale hooliganism and intentional damage or destruction of property correlate with particular properties of urban spaces and design elements.

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Assessment of Commuter Satisfaction in the Usage of Bus-Shelters: the Ataköy Zone 5 and Beşyol Metrobus Stops, Istanbul

Abstract

Bus shelters, which form a part of daily lives of people, generally provide service as small areas of urban space created for short-term periods of waiting. From the perspective of spatial design, it is important that an environment of good quality is provided for users of bus-shelters. This study proposed hypotheses to research how the physical design of bus shelters (location-accessibility, anthropometric characteristics, roofing and walls, lighting, electronic information, seating, etc.) affected general satisfaction of their users. To establish users’ general satisfaction, direct observation was performed and the hypotheses were tested through surveys conducted at bus-shelters selected in two areas of Istanbul (Ataköy-Beşyol) with different economic levels, and an assessment was made of the users’ satisfaction analyses and related problems of bus shelter design. In the conclusion, it was established that there is a significant correlation between general satisfaction and, among other things, the perceived degree of difficulty in getting on and off buses, the harmonization of bus shelter design with the surroundings, the adequacy of a shelter for summer use, the comfort of a shelter, the adequacy of seating, and the extent to which the shelter is maintained.

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