Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: May 2004
Authors: A.J. Pontes, António Sergio Pouzada, A.M. Brito
This paper shows data on the ejection force of injection mouldings.
For each processing condition the ejection force was characterized by the average of the data from 5 consecutive mouldings.
The ejection force data for both materials as a function of the mould temperature are shown in the Fig. 3.
The experimental ejection force data for the tubular mouldings when the holding pressure is varied are shown in Fig. 4.
The ejection force data shown in the Fig.5 represents the effect of the cooling time for both materials.
Online since: September 2015
Authors: Karel Obrtlík, Ivo Šulák, Ladislav Čelko
Hardening/softening curves, cyclic stress-strain curve and fatigue life data of both materials were obtained.
It has not been observed any improvement or reduction of low cycle fatigue life in representation of total strain amplitude versus number of cycles to failure of grit blasted material in comparison with as-received material.
Experimental data were fitted by the power law: log σa = log K´ + n´ log εap (1) and the fatigue hardening coefficient K´ and the fatigue hardening exponent n´ were evaluated using linear regression analysis.
Existing experimental data show that the grit blasting enhances the fatigue resistance of engineering materials by introduction of compressive residual stresses to the surface layer and by work hardening of the layer [1, 3, 4].
Online since: November 2013
Authors: Ramin Khajavi, Amin Meftahi, Somayeh Alibakhshi, Leila Samih
It was used to estimate bacterial reduction via immersing the treated samples in bacteria solution.
The bacterial reduction was evaluated for treated and untreated gauze according to Eq. 1.
A-B B C= ×100 (1) Where C is the bacterial reduction ratio, A and B are the number of bacterial colonies from untreated and treated gauze, respectively.
Fig. 3 indicated the crystallinity index which obtained from X-ray diffraction data.
Table 3- Bacterial reduction of single and double treated gauze with nanosilver Treated single coated gauze with nanosilver (500ppm) Treated double coated gauze with nanosilver (500ppm) Bacteria E.coli S.aureus E.coli S.aureus Reduction (%) 99.9 99.9 99.9 99.9 A considerable point about antibacterial property of two samples is decreasing the probability of microbe’s diffusion because of forming a nanofiber layer in the double cultured specimen and also nanoscale pores.
Online since: August 2013
Authors: Shi Bo Zhang
The reduction factors according to the age of concrete were given, and the corresponding design suggestions were put forward [6].
In which is the concrete effective modulus reduction coefficient
(1) (2) 1) The calculation of creep coefficient Using CEB-FIP creep model (1990), creep coefficient can be obtained by formula (3): (3) is nominal coefficient which can be check by the chart, the value of can be obtained by formula (4), in while the value of unknown coefficients can be check by standard[9]. 2) The calculation of aging coefficient By the method of combining the creep constitutive theory and the flow theory , which considering influence of the age, the nonlinear relation between the under-relaxation factor R and creep coefficient can be deduced, according to fitting the experimental data, new practical formula (4) calculating aging coefficients is obtained: (4) 3) The calculation of contraction deformation Using CEB-FIP creep model (1990), shrinkage strain can be obtained by formula (5): (5) and can be obtained by formula (6) : (6) 3.2 Inertia conversion Two kinds of materials converted to a kind of material, which can use a single
Comparison test 4.1 The computational results According to geometry size and stress conditions of the experiment model, using CEB-FIP creep model (1990), effective modulus reduction coefficient of concrete can be calculated (as show in table 1), we can know that is decreasing from the table 1.
Table 1 Effective modulus reduction coefficient of concrete change with time Month 1 2 3 4 5 6 7 8 9 10 Effective modulus reduction coefficient 1.34 2.05 2.41 2.60 2.71 2.86 2.98 3.05 3.12 3.25 If stiffness correction coefficient of the model is equal to 1, the computational results of the midspan deflection change with time are shown at table 2.
Online since: January 2013
Authors: Xiong Chen, Zhi Wang, Wei Zi Qin, Shuai Shuai Bao, Feng Lian Zhang, Dong Sheng Li
The experimental data represented the means calculated from three independent samples.
Interestingly, did which kinds of electron acceptors substitute for oxygen atom at low oxidation-reduction potential and facilitate lignin biodegradation?
P.stutzeri 156 needed to keep the balance of oxidation-reduction potential to guarantee normal growth and metabolism.
Thus, glycerin synthesis may regulate the balance of oxidation-reduction potential.
Moreover, beside by the denitrification, we ensured that P. stutzeri 156 could balance NADH/NAD+ ratio via NADH oxidation pathways such as the biosyntheses of PHB and glycerin under low oxidation-reduction potential.
Online since: March 2024
Authors: Abdolhossein Naghizadeh, Molusiwa C. Ramabodu, Eric A. Ohemeng
Data obtained from the literature was used to develop the model.
Validations of the model using independent data sources gave realistic predictions.
Data obtained from the literature was used to develop the model.
Evidently, there is a strong correlation between the two sets of data.
Apparently, there is a strong correlation between the two data sets.
Online since: December 2012
Authors: Jie Liu, Dong Dong Yang, Ling Jun Zhong, Li Feng, Hang Hang Wang
Literature [2] proposed slope stability analysis of nonlinear finite element mixed method and strength reduction finite element method and the finite element iteration method for joint used in slope stability analysis.
Based on strength reduction method for slope stability analysis, simulation of reinforcing material and soil interaction,literature[4] analysised the slope stability of reinforced embankment on soft soil.
Literature [5] applied the strength reduction theory for finite element method to solve its application in slope stability analysis problem.
Literature [6] studied on the impact factor of the strength reduction calculations and slope instability criterion method and discussed the method used in slope stability of earth-rock dam in the analysis of feasibility.
Also, because the slope body relative lack of borehole data, modeling, consider the most dangerous situation,that is continuous through argillaceous limestone, laminated in the analysis section.
Online since: October 2017
Authors: Sib Krishna Ghoshal, Ramli Arifin, Syarinie Azmi
Over the years, various physical and chemical methods are developed to increase the water contact angle such as the reduction of surface energy by chemical modification method [2] and the control of the surface roughness [3,4].
The surface roughness of the glass samples was determined by AFM (SPI3800N) and their hydrophobicity is measured using OCA meter (Data Physics).
It is this surface chemistry alteration which is responsible for the reduction of hydrogen-bonds formation in contact with water because of low surface free energy in the presence of SiO2.
Conversely, further addition of SiO2 contents more than 0.10 mol% makes the sample saturated and thus a reduction of WCA.
However, at higher SiO2 concentration (more than 0.10 mol%) a rapid reduction in the SR and WCA is ascribed to the surface saturation effects.
Online since: July 2008
Authors: Fabrice Pierron
For instance, Fig. 3 shows the bending stiffness reduction map obtained experimentally on a carbonepoxy unidirectional plate tested in bending [19].
The damage was simulated by removing two plies from the back surface of the plate, resulting in a nominal stiffness reduction of about 30%.
Deflectometry set-up Stiffness reduction Fig. 3.
Deflectometry set-up, damaged plate and identified stiffness reduction map.
Determination of the mechanical behaviour of biological tissues is a key issue in the early detection of cancerous tumours (stiff tumours embedded in softer tissues) or in the production of data to establish models of the human body for crash simulation, for instance.
Online since: December 2013
Authors: Norrizal Mustaffa, Siti Mariam Basharie, Azmahani Sadikin, Amir Khalid, Bukhari Manshoor, Ahmad Jais Alimin
The vehicle performance data comprised power (kW), flywheel torque (Nm) together with the exhaust emissions measurements.
Nevertheless, the increasing of preheat fuel temperature has not influences to the reductions of HC in overall combustion process.
The increasing of biodiesel concentration in blends has a beneficial in HC emissions reduction.
In addition, preheated biodiesel produced the reduction of opacity emission.
This might due to the reduction in viscosity and subsequent improvement in spray, fuel-air mixing and combustion characteristics by preheating.
Showing 9151 to 9160 of 40345 items