Wyniki wyszukiwania - Biblioteka Nauki

1

Value added of intellectual capital in banks and the hysteresis effect

100%

Smuda-Kocoń M.

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2019

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tom z. 136

551--563

EN

The aim of this paper is to contribute to the identification, illustration and description of patterns in the Value Added Intellectual Capital for banks in the long term. The study is part of the discussion on contemporary measures of organisational success and sources of value creation. Based on the subject literature, it is hypothesised that intellectual capital creates added value with some delay due to the operation of various external stimuli (e.g. financial market turbulence, economic slowdown), which may be explained in a logically coherent way using the hysteresis effect. The analysis covers empirical material obtained during broader research on a sample of banks listed on the Warsaw Stock Exchange in the years 2007-2017. As results of the study show, over the last decade, banks have evidently recorded the creation of added value in connection with the held intellectual capital resources. Its growth should, however, be interpreted with a large degree of caution. The occurrence of turbulence on the financial markets in the years 2007-2009 was not without impact on the results obtained.

2

Hydrological properties of biochar-amended expansive soil under dynamic water environment and biochar-amended soil’s application in green roofs

84%

Li M. , Garg A. , Huang S. , Jiang M. , Mei G. , Liu J. , Wang H.

Acta Geophysica

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2024

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tom Vol. 72, no. 2

1055--1065

EN

Biochar is widely used as a soil amendment in green roofs because it can increase the soil’s water-holding capacity, inhibit cracking, and provide nutrients for vegetation. The interaction mechanism between biochar and expansive soil is a significant factor in the performance of green roofs. However, research mainly focused on the hydrological scale (i.e. runoff regulation and rainwater storage), and there is a lack of research on the hydrological properties (i.e. hysteresis of soil-water characteristic curves, changes in soil pore size and pore distribution, formation and development of cracks and swelling-shrinking characteristics) of biochar-amended expansive soils under dynamic water environment. This test was conducted out on soil columns with expansive soil and 5% (by mass) biochar-amended under 5 drying-wetting cycles. The results showed that within the range of water content suitable for plant growth (i.e. between the anaerobic point and wilting point), the hysteresis area of soil-water characteristic curves of the amended soil is smaller than the bare soil at each drying-wetting cycle. The addition of biochar changes the pore size distribution of the soil, reduces the pore size and swelling-shrinking characteristics of the expansive soil, and inhibits the development of cracks. Therefore, the addition of biochar significantly attenuates the hysteresis characteristics of the soil-water characteristic curves of expansive soils, which may improve the stability of the hydraulic performance of green roofs. The results contribute to the understanding of the physicochemical and water properties of biochar-amended expansive soil and provide theoretical support for the application of biochar to green roofs.

3

An Experimental Study on Thickness Loss of Wilton Type Carpets Produced with Different Pile Materials after Prolonged Heavy Static Loading. Part 2, Energy Absorption and Hysteresis Effect

67%

Celik N. , Koc E.

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2007

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tom Vol. 15, no. 3 (62)

87--92

EN

In the first part of the article, an evaluation was made of the characteristic parameters defined as the squeezing susceptibility or compression sensitivity S, permanent deformation DP, elasticity E and resilience R, all quantities expressed in per cent, which determine the behaviours of carpets of different pile materials (wool, acrylic and PP). This second part consists of an extended analysis covering the energy absorption, work done on the carpet, damping characteristics and hysteresis effect of pile materials on the behaviours of carpet during recovery after unloading the static pressure. Therefore, some more definitions are also presented, such as the rigidity coefficient, withdrawal force, total energy, elastic energy, damping energy, elastic recovery coefficient, damping coefficient and decompression coeff-icient. Throughout the paper, these parameters are specifically symbolised and explained for each carpet, and the results are discussed at the end.

PL

W pierwszej części artykułu oceniono charakterystyczne parametry, określone jako podatność na ściskanie S, stałą deformację Dp, elastyczność E, oraz odprężność R, wszystkie wyrażone w procentach, określające zachowanie się dywanów o różnych materialach okrywy, takich jak wełna, akryl i polipropylen. Druga część przedstawia poszerzoną analizę dotyczącą absorpcji energii, pracy wykonanej przez dywan, charakterystyk tłumienia oraz efektu histerezy materiału okrywy podczas odprężania dywanu po ustaniu jego statycznego obciążenia. Do analizy wprowadzono dalsze parametry, określone pojęciami takimi jak współczynnik sztywności, całkowita energia, energia elastyczna, energia tłumienia, współczynnik elastycznej odprężności, współczynnik tłumienia i dekompresji. Przeprowadzono analizę tych parametrów dla poszczególnych dywanów.

4

Investigation of the mechanical and hygrothermal behavior of coffee ground wastes valorized as a building material: analysis of mix designs performance and sorption curve linearization effect

67%

Hamdaoui M. A. , Benzaama M.-H. , El Mendili Y. , Chateigner D. , Gascoin S.

Archives of Civil and Mechanical Engineering

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2023

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tom Vol. 23, no. 1

art. no. e57, 2023

EN

Coffee ground wastes (CGW) are by-products from the coffee-making processes. In this study, we propose to valorize them in construction materials at large scale. In particular, we investigate the mechanical and hygrothermal performances of earthen cob construction with incorporation of various amounts of CGW. Our results indicate that adding coffee grounds to cob enhances its hygrothermal performances as well as its compressive strength. An interesting enhancement of the lightened earth thermal characteristics as well as a good control of the hydric load in the air while maintaining acceptable mechanical properties is observed. Numerical analysis is used to evaluate the hygrothermal behavior of cob specimens to better understand their energy performances. A simplification of the simulation methods using a linearization of the sorption curve is incorporated to reduce calculation times and optimize outputs. The method is validated using experimental data, which shows a promising improvement compared to previous approaches. The proposed method can be faithfully applied to the study of hygrothermal behavior of biomaterials, which is strongly related to the building energy performance and the investigation of their durability in a fast and effcient way.

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Hysteresis effect of water retention curves for different aggregates of mineral [Haplic Luvisol] and organic [Gleyic Phaeozem] soils

67%

Witkowska-Walczak B.

Polish Journal of Soil Science

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2003

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tom 36

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nr 1

EN

The results of studies on the hysteresis effect of water retention curves of mineral and organic soils showed that Gleyic Phaeozem aggregates are characterized with a greater ability to retain water than are Haplic Luvisol aggregates. The highest values of moisture differences were noticed for 0.5-1 mm Gleyic Phaeozem aggregates at low soil water potential. The effect of hysteresis was small for aggregates of 3-5 and 5-10 mm in the whole range of the soil water potential and for pF higher than 1 for aggregates bigger than 0.5 mm. The maximum surfaces of the hysteresis loop were noticed for 0.5-1 and 0.25-0.5 mm aggregates of Gleyic Phaeozem and these were about 2.5 times higher than those for the aggregates of Haplic Luvisol.