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Online since: July 2015
Authors: Yuli Yetri, Gunawarman Gunawarman, Emriadi Emriadi, Novesar Jamarun, Ken-Cho Ken-Cho, M. Nakai, M. Niinomi
Such kind of inhibitor is expected not only to hinder physical properties degradation, but also to avoid mechanical properties reduction during corrosion process.
This is due to the reduction of corrosion area as indicated by the surface appearance in Fig. 3 where the corrosion area becomes smaller with the increase of inhibitor concentration.
In order to show the adsorption type of the inhibition process, the data of surface coverage (Ѳ) is plotted against log concentration of inhibitor (C) as can be seen in Fig. 5.
The reduction of mechanical properties becomes smaller when the amount of the TCPE inhibitor increases.
This indicates that the protection layer is not only to reduce surface degradation, but also to avoid the mechanical properties reduction.
Online since: July 2010
Authors: Hyun Dong Lee, Pill Jae Kwak, Joo Yeon Lee
Once analyzing foreign data, synthetic resin pipes are widely used in even drainpipe and items for piping such as connecting parts are diverse and accessories of piping for general use are being laid underground.
According to the analysis of foreign data, a synthetic resin pipe is being used greatly even for a drainpipe, the components for water laying including joint parts are various, and the components for normal pipe laying is being used for laying.
(2) The Result through Simulated Scale Down Box Test The feature of soil pressure of PVC pipes evaluated from simulated scale down box test showed that since vertical soil pressure expressed on the upper part of a pipe is small compared with applied live loads, when considering only the feature of vertical soil pressure over applied loads, the behavior of PVC pipes showed one of flexible pipes and it is judged that the stability of PVC pipes is secured under the vertical loads(straight pipe 1.42kgf/cm2 , socket connecting pipe 1.26kgf/cm2) as simulated in this simulated scale down box test from the features of soil pressure by vertical loads and the observance of the state of the pipe after test Acknowledgment This paper is one of the results from the third phase of research on "Application of Prevention and Reduction System of the Water Leakage (code #4-2-3)", which is one of the R&D projects of "'Sustainable Water Resources Research Program" References [
Online since: November 2017
Authors: Aleksandr S. Sidorenko, Artem G. Rybaulin, Elena L. Kuznetsova, Lev N. Rabinskiy
Advantages of spot-welding in comparison with similar plug joints are a reduction in the overall construction weight, increased assembly productivity, lower cost, and the possibility of connecting parts with different thicknesses.
The initial data for modeling are the geometric characteristics of the construction and welded joints, the conditions for fixing it and the mass distribution, the mechanical characteristics of the materials, both in the design as a whole and locally in welded joint zones, as well as the spectral characteristics of the random acceleration processes in suspension nodes.
This corresponds to the data of publications [13, 14], in which, based on experiments, it was shown that failure at a welded point most often occurs near the weld-point contour with the formation of cracks or thinner material breakout around the welded point.
The initial data for obtaining the realizations of σ(t) are the dependences for the spectral stress densities Sσ(ω).
To determine the K coefficient, the formula is used: (4) Here Kσ is the effective strength reduction factor, Kdσ is the scale factor, KFσ is the fatigue strength surface condition factor, Kv is the fatigue surface hardening factor, KA is the anisotropy factor.
Online since: July 2020
Authors: Antoni Antoni, Juliana Anggono, Suwandi Sugondo, Bily Budiarto, Hariyati Purwaningsih
Using data of weight and area (length x width) measured from flexural test specimens, the area density of each specimen was calculated in concern related to lightweight property.
These two data are important in comparison with the specification data of current materials used as automotive interior parts, such as package tray by the automotive industry.
Steam treatment given to baggase fibers results in a larger reduction of composite thickness (7.6 %) compared with the thickness of composites using natural fibers which were treated with alkali solution (6.4%).
The addition of steam treated rice husk added to bagasse/PLA mixture results in further reduction in thickness as shown in samples SB, SC, NB, and NC.
The further reduction in thickness from steam treatment might have caused by further loss of constituent components of bagasse fibers and rice husk.
Online since: August 2010
Authors: Guo Qun Zhao, Lian Fang He, Hui Ping Li
The strength of the formed parts by hot stamping is very high, which can meet the requirement of auto security with the reduction of parts' thickness.
Firstly, the sample volume shrinks with the reduction of temperature, the tendency of expansion curve goes downwards.
The data listed in table 1 show the isothermal phase-transformation start time and end time at some temperatures.
The data calculated are shown in Table 2.
In terms of the data in table 1 and table 2, the values of Ac1-Ac3-Ar1-Ar3 and Ms-Mf, the TTT curves of 22MnB5 is drawn and shown in Fig.5.
Online since: June 2019
Authors: Vladimír Pribramsky
(1) Graphical representation of βTh,adapted is apparent on Fig. 2 below where is also provided comparison to measured data and function of original βTh with limited upper boundary.
This behavior is possible to incorporate into model B4 for UHPC by adapting calculation of the w/c ratio by reduction based on parameter βTh (Eq. 2).
Therefore in the concrete matrix there is significant reduction of free water that could escape by drying shrinkage due to rapid cement hydration.
(5) In this area and especially in the case of UHPC there seems not to be enough data to apply and additional experimental verification of this phenomenon is required.
Fig. 3: Dependency of w/c parameter on internal relative humidity in concrete after hydration Comparison with Experimental Results Proposed modifications of model B4 listed in the chapters above lead to very good conformity between experimental data and predicted values by adapted model B4.
Online since: January 2021
Authors: Asma Ababsa, Hachemi Ben Temam, Abderrahmane Gana, Ouahiba Herzallah
That is, the less noble Co ions preferentially deposited to the cathode surface before the reduction of the Ni ions.
In addition, the (111) growth orientation gradually increased with the Co content, and therfore increase the FWHM of the Bragg line for the (111) peak which is in accordance with the gradual reduction of grain size when the Co content increased from 0 to 34.32 wt.% in Ni–Co alloys as shown in Fig. 3a-b.
Beyond this amount, there is a decrease in the grain size of the Ni- alloys Co which reaches the minimum value (18.89 nm), this reduction is attributed to the predominance of the hcp phase.
According to the data gathered in Table 2, the polarization resistance of Ni–Co alloys increases by increasing cobalt content, then it reduces after reaching a maximum value at the 34,32 wt% Co content.
Electrochemical data of the Ni–Co alloy coatings extracted from potentiodynamic polarization curves.
Online since: April 2021
Authors: Isao Watanabe, Budhy Kurniawan, Hideaki Sakai, Noriaki Hanasaki, Utami Widyaiswari
The open circle symbol, red line, purple bar, blue line, and the green asterisk indicate the experimental data, calculated intensity, Bragg peak position of Nd2Ru2O7, the difference between experimental data and calculated intensity, and signal of Nd3RuO7, respectively.
This indicates the contribution of the impurity phase to c(T) was suppressed due to the reduction of impurities.
The reduction in the meff below TN1 is guessed to be due to the ordering of Ru4+.
We notice that the reduction in the meff of Sample-I was larger than that in Sample-II because Sample-I had more amount of Ru4+ moments.
We observed this hysteresis loop in M(H) data as shown in Fig. 3.
Online since: November 2015
Authors: Mihai Dragomir, Ştefan Bodi, Daniel Banyai
With the data collected from the articles mentioned above, relating to the potential of natural light, transported, available at any given time, there were made different constructive scenarios, for spaces delimited by movable walls.
It has to be noted that the clouds cause a reduction of the solar input by about 15% on a cloud covered day to nearly 90% on a very cloudy day.
The Table 1, below, shows the data related to the situations described, the values being obtained by using the DIALux software.
The authors in [12] presents data to achieve a natural lighting system, and results obtained with a system designed by them.
When applying this percentage to the total energy consumption for lighting (approx. 15%), there is obtained an overall energy reduction of 2%.
Online since: November 2015
Authors: Aristotel Popescu, Konstantinos Papakostas, Carmen Ema Panaite, Oana Dodun
The world average value of this component cannot be computed, because many countries do not measure or publish such data.
Fig. 1 presents the breakdown of residential consumption using published data for the countries members of OECD (Organization for Economic Co-operation and Development) [2].
As a consequence of energy efficiency measures and financial support programs implemented at EU and national levels, a significant reduction of heat demand in buildings is expected to be achieved in the next years.
Currently published data estimate that for AC the world consumes annually about 1 trillion kilowatt hours (kWh) of electricity, and energy for cooling could increase about 10 times until 2050 [8].
Concerning the price, since 2007, a cost reduction of about 50% was achieved because of the further standardization of the solar cooling kits.
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