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Online since: September 2013
Authors: Michela Nocetti, Paolo Burato, Michele Brunetti
Some examples of important monumental buildings in Rome and Naples have structure of chestnut with irregular cross section, for which it is difficult to come to reliable data on mechanical properties in the diagnostic phase.
The data analysis started with the calculation of Pearson correlation coefficients, to check the influence of the visual parameters over the mechanical properties of the timber.
Furthermore, as concern the bending strength, currently no adjustment for moisture content is recommended by the standardization, but further tests are going on to verify that no significant reduction on strength properties exists from green to dry timber conditions.
The data analysis started with the calculation of Pearson correlation coefficients, to check the influence of the visual parameters over the mechanical properties of the timber.
Furthermore, as concern the bending strength, currently no adjustment for moisture content is recommended by the standardization, but further tests are going on to verify that no significant reduction on strength properties exists from green to dry timber conditions.
Online since: August 2019
Authors: Vasyl M. Karpiuk, Olha Ahaieva, Oleksandr Posternak
Reliability and Bearing Capacity Indexes of Normal and Oblique Sections of Span Prestressed Structures with Bar Reinforcement
As a result of processing the data obtained in the works [12, 13, 14], extracting insignificant and recalculating the remaining coefficients with the help of software package COMPEX, which was developed in the Odessa State Academy of Civil Engineering and Architecture, adequate mathematical models of design reliability indexes β, bearing capacity Мu of normal (series А) and oblique sections of rectangular beam reinforced concrete structures with prestressed bar reinforcement that were determined according to the Eurocode 2 [3] in edition of DSTU B V.2.6 156:2010 [2] VRd, c (series C), as well as mathematical models of design reliability indexes β and bearing capacity of oblique sections, which are failed by oblique compressed band V according to the author's technique [15] (series E) were received:
(1)
(2)
(3)
(4)
(5)
(6)
These
Dependence of reliability index β and bearing capacity of oblique sections V [15] of span prestressed reinforced concrete structures, which are failed by oblique compressed band, on the longitudinal reinforcement ratio (а), the concrete class (b), the class of prestressed bar reinforcement (c) and complex influence of these constructive factors (d) on β and V Reliability and Bearing Capacity Indexes of Normal and Oblique Sections of Span Prestressed Structures with Wire Reinforcement As a result of processing the data obtained in the works [12, 13, 14], extracting insignificant and recalculating the remaining coefficients with the help of software package COMPEX adequate mathematical models of design reliability indexes β, bearing capacity Мu of normal (series B*) and oblique sections of rectangular beam reinforced concrete structures with prestressed wire reinforcement that were determined according to the Eurocode 2 [3] in edition of DSTU B V.2.6 156:2010 [2] VRd, c (series D*), as
A positive sign near the quadratic effect shows that with a further decrease in fp0,1k beyond the variation of this factor, a significant reduction of VF* will not occur, that is, the magnitude of VF* will decrease nonlinearly.
Dependence of reliability index β and bearing capacity of oblique sections V [15] of span prestressed reinforced concrete structures, which are failed by oblique compressed band, on the longitudinal reinforcement ratio (а), the concrete class (b), the class of prestressed bar reinforcement (c) and complex influence of these constructive factors (d) on β and V Reliability and Bearing Capacity Indexes of Normal and Oblique Sections of Span Prestressed Structures with Wire Reinforcement As a result of processing the data obtained in the works [12, 13, 14], extracting insignificant and recalculating the remaining coefficients with the help of software package COMPEX adequate mathematical models of design reliability indexes β, bearing capacity Мu of normal (series B*) and oblique sections of rectangular beam reinforced concrete structures with prestressed wire reinforcement that were determined according to the Eurocode 2 [3] in edition of DSTU B V.2.6 156:2010 [2] VRd, c (series D*), as
A positive sign near the quadratic effect shows that with a further decrease in fp0,1k beyond the variation of this factor, a significant reduction of VF* will not occur, that is, the magnitude of VF* will decrease nonlinearly.
Online since: October 2011
Authors: Qi Zhuang He, Jin Huang, Meng Ye, Rui Chen
The reduction of intensity is mainly caused by contrast matching between the silicate framework and organic moieties which are located inside the channels of SBA-15 [23].
Both the First-order model and the Second-order model can fit adsorption kinetics data.
The adsorption data are fitted well with the First-order model and Second-order model.
Both the First-order model and the Second-order model can fit adsorption kinetics data.
The adsorption data are fitted well with the First-order model and Second-order model.
Online since: May 2020
Authors: Aminatun Aminatun, Prihartini Widiyanti, Fitria Renata Bella
Introduction
Based on WHO data, traffic accidents cause more than 1,2 million people to die every year, and are the main cause of death at the age of 15-29 years.
Based on swelling test data analysis, the addition of glycerol can increase the free volume between the cellulose polymer chain and increase the free hydroxyl group that will form hydrogen bonds with the liquid so as to increase the membrane's ability to absorb liquid.
Then there is a reduction in soluble glucose due to the breaking of the molecular chain that causes biocomposite to degrade and also affect its mechanical properties [18].
Based on swelling test data analysis, the addition of glycerol can increase the free volume between the cellulose polymer chain and increase the free hydroxyl group that will form hydrogen bonds with the liquid so as to increase the membrane's ability to absorb liquid.
Then there is a reduction in soluble glucose due to the breaking of the molecular chain that causes biocomposite to degrade and also affect its mechanical properties [18].
Online since: August 2017
Authors: Thomas Wischgoll, Jörg Hartig, Hans Hagen, Tobias Post, Christina Gillmann, Bernd Hamann, Benjamin Kirsch, Jan Christian Aurich
Aurich2 ,h
1Computergraphics and HCI, University of Kaiserslautern, Germany
2Institute for Manufacturing Technology and Production Systems, University of Kaiserslautern
3Advanced Visual Data Analysis, Wright State University, U.S.A.
4Department of Computer Science, University of California (UC Davis), U.S.A.
Fig. 1: The industrial vision system pipeline applied to the presented use case: For each cutting tool a data acquisition step is performed to obtain a reference image and images of the cutting tool after different times of use.
Das 3D tool wear measurement and visualisation using stereo imaging International Journal of Machine Tools and Manufacture Vol. 37, Nr. 11, p.1573-1581, 1997 [17] Pan Fua, Weilin Lib, Liang Guo Fuzzy Clustering and Visualization Analysis of Tool Wear Status Recognition Procedia Engineering Vol. 23, p.479-485, 2011 [18] Weilin Li; Pan Fu; Xiaohui Li Visualization Monitoring of Tool Wear States Based on Supervised Dimensionality Reduction and Clustering Procedia Engineering Vol. 8, p.4p1056, 2013 [19] W.
Fig. 1: The industrial vision system pipeline applied to the presented use case: For each cutting tool a data acquisition step is performed to obtain a reference image and images of the cutting tool after different times of use.
Das 3D tool wear measurement and visualisation using stereo imaging International Journal of Machine Tools and Manufacture Vol. 37, Nr. 11, p.1573-1581, 1997 [17] Pan Fua, Weilin Lib, Liang Guo Fuzzy Clustering and Visualization Analysis of Tool Wear Status Recognition Procedia Engineering Vol. 23, p.479-485, 2011 [18] Weilin Li; Pan Fu; Xiaohui Li Visualization Monitoring of Tool Wear States Based on Supervised Dimensionality Reduction and Clustering Procedia Engineering Vol. 8, p.4p1056, 2013 [19] W.
Online since: August 2021
Authors: Muhammad Amir Solihin, Mahfud Arifin, Pujawati Suryatmana, Rina Devnita, Fajri Syahid Nurhakim
The phosphate solubilizing microbes play an essential role in P transformation such as mineralization of organic P compounds by liberating inorganic P, changing the solubility P, inorganic P compounds oxidation or reduction, and immobilization of P [13].
Each polybags were incubated for one month Analysis Data.
The data acquired quantitatively and analyzed by analysis of variance (ANOVA).
Each polybags were incubated for one month Analysis Data.
The data acquired quantitatively and analyzed by analysis of variance (ANOVA).
Online since: April 2024
Authors: Muhammad Khan, Andrew Starr, Ibrahim Alqahtani
To determine the fracture toughness of the AL6082-T651alloy, the load and displacement data are collected and subsequently analysed in accordance with standards [34].
The critical load (PQ) value can be calculated by drawing the 5% secant line to the maximum load (Pmax) on experimental data using the curve fitting phenomenon, as shown in Fig. 6.
The reduction in the 2.2% load-carrying capacity is small; however, it is obtained for the short period (168 hours) of sample immersion in the corrosive environment.
The critical load (PQ) value can be calculated by drawing the 5% secant line to the maximum load (Pmax) on experimental data using the curve fitting phenomenon, as shown in Fig. 6.
The reduction in the 2.2% load-carrying capacity is small; however, it is obtained for the short period (168 hours) of sample immersion in the corrosive environment.
Online since: January 2023
Authors: Mohammad Saifullah Khan, Minhaj Rehman
During the experiments, the variation in ambient temperature and relative humidity was recorded using a tempnote TH32 reusable temperature and humidity data logger at a sampling rate of 10s.
Ambient temperature and relative humidity are nuisance factors that affect the drying in a non-uniform way, which might result in erratic data distribution in some cases.
Furthermore, for (), they observed a substantial reduction in the drying rate.
Ambient temperature and relative humidity are nuisance factors that affect the drying in a non-uniform way, which might result in erratic data distribution in some cases.
Furthermore, for (), they observed a substantial reduction in the drying rate.
Online since: January 2016
Authors: Jean Jacques Blandin
Data are frequently obtained for two phase alloys (like Zn-22%Al, Pb-62%Sn…) for which there is not only GBS but also PBS (phase boundary sliding), knowing that the extents of sliding may differ from one kind of interfaces to the other.
In this case, reduction of temperature can avoid α case formation or increase life of tools.
Fig. 2: Exceptional elongation in an extruded ZK60 magnesium alloy after processing by ECAP [40] When data are compared between various superplastic alloys, the “true” grain size must be considered, namely the grain size during deformation (at the beginning and during testing) and not only the initial one.
In this case, reduction of temperature can avoid α case formation or increase life of tools.
Fig. 2: Exceptional elongation in an extruded ZK60 magnesium alloy after processing by ECAP [40] When data are compared between various superplastic alloys, the “true” grain size must be considered, namely the grain size during deformation (at the beginning and during testing) and not only the initial one.
Online since: April 2018
Authors: Vladimír Jerz, Marian Králik
The consequence of the detrimental effect of residual stresses (usually tensile) is the formation of cracks, the reduction of fatigue life, lower brittle rupture resistance, the occurrence of stress corrosion and the like.
By monitoring these parameters and comparing them with the data of the same but stress-free sample, the magnitude of residual stresses occurring in turning can be determined.
The methodical part of the experiment consists of: • machining of material, • symmetrical cyclic loading of material by pushing-pulling, • the comparison of the lifetime curve of the processed sample with data of samples free of residual stresses.
By monitoring these parameters and comparing them with the data of the same but stress-free sample, the magnitude of residual stresses occurring in turning can be determined.
The methodical part of the experiment consists of: • machining of material, • symmetrical cyclic loading of material by pushing-pulling, • the comparison of the lifetime curve of the processed sample with data of samples free of residual stresses.