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Online since: September 2011
Authors: Syazwani A. Rahim, Khairiah K. Turahim, Asan G.A. Muthalif
The line of sight of their optics must be aligned during the entire communication time; this is crutial in large distance data transmission.
The alignment of transmitter and receiver of telescope is crucial in transferring data.
The settling time with the controller has reduced to 4.046 s from original value of 17.021 s, this is a reduction of 76.2%.
Simulation study on performance of LQR controller is given and significant reduction in settling time and percentage of overshoot is achieved for a step input.
The alignment of transmitter and receiver of telescope is crucial in transferring data.
The settling time with the controller has reduced to 4.046 s from original value of 17.021 s, this is a reduction of 76.2%.
Simulation study on performance of LQR controller is given and significant reduction in settling time and percentage of overshoot is achieved for a step input.
Online since: November 2014
Authors: S. Padmanabhan, J. McGrath, M.E. Pemble, Syara Kassim
Collimated un-polarized white light from a tungsten lamp was focused onto the sample using an 8 cm focal length lens and the transmitted light was collected through an optical fibre to the spectrometer (Ocean optics) and the data processed by SpectraSuite software.
For angle resolved transmission data collection, the sample mounted onto a rotational stage was rotated at angles, theta, ranging from 0 to 65o, measured from the surface normal of the (111) hexagonal plane grown parallel to the substrate surface.
This shift may be attributed to a combined effect of a small reduction in the effective refractive index of the material neff (composite SiO2: air as compared to composite PMMA: air) and a slight reduction in the lattice spacing between the layers of voids in the strucutre as compared to the spacing between the spheres in the parent strucutre, that arises because of the finite thickness of the SiO2 layer grown between the spheres.
The correlation with the Bragg-Snell relationship was further confirmed by fitting the data points obtained to a plot of the square of the wavelength maximum (λ2max) for the stop bands recorded at varying angle of incidence angle, θ, against sin2θ, Figure 4.
The silica inverse opal exhibits a blue shift in the stop band as compared to that of the bare PMMA opal which we attribute to a reduction in effective refractive index and a reduction in the effective lattice spacing of the layers of voids in the inverted structure as compared to that of the layers of spheres in the bare PMMA structure.
For angle resolved transmission data collection, the sample mounted onto a rotational stage was rotated at angles, theta, ranging from 0 to 65o, measured from the surface normal of the (111) hexagonal plane grown parallel to the substrate surface.
This shift may be attributed to a combined effect of a small reduction in the effective refractive index of the material neff (composite SiO2: air as compared to composite PMMA: air) and a slight reduction in the lattice spacing between the layers of voids in the strucutre as compared to the spacing between the spheres in the parent strucutre, that arises because of the finite thickness of the SiO2 layer grown between the spheres.
The correlation with the Bragg-Snell relationship was further confirmed by fitting the data points obtained to a plot of the square of the wavelength maximum (λ2max) for the stop bands recorded at varying angle of incidence angle, θ, against sin2θ, Figure 4.
The silica inverse opal exhibits a blue shift in the stop band as compared to that of the bare PMMA opal which we attribute to a reduction in effective refractive index and a reduction in the effective lattice spacing of the layers of voids in the inverted structure as compared to that of the layers of spheres in the bare PMMA structure.
Online since: September 2013
Authors: Worawut Makcharoen
Effect of Platinum Substitution on the Microstructures and Dielectric Relaxation of CaCu3Ti4O12 Ceramics
Worawut Makcharoen1, a
1College of Data Storage Innovation,King Mongkut's Institute of Technology Ladkrabang
Bangkok 10520, Thailand
awarmak77@gmail.com
Keywords: CCTO, Dielectric properties, Perovskites, IBLC
Abstract.
All diffraction peaks were corresponds to the known peaks of the standard CCTO, indexed from the data in the Inorganic Crystal Structure Database (ICSD) file No.032002.
It is believed that the PtO2 addition resulted in a reduction in total resistance of the grain boundary [11].
This may cased a reduction in conductivity as a result of lowered loss tangent.
Acknowledgment This work was supported by College of Data Storage Innovation, King Mongkut's Institute of Technology Ladkrabang.
All diffraction peaks were corresponds to the known peaks of the standard CCTO, indexed from the data in the Inorganic Crystal Structure Database (ICSD) file No.032002.
It is believed that the PtO2 addition resulted in a reduction in total resistance of the grain boundary [11].
This may cased a reduction in conductivity as a result of lowered loss tangent.
Acknowledgment This work was supported by College of Data Storage Innovation, King Mongkut's Institute of Technology Ladkrabang.
Online since: December 2014
Authors: Patamawan Phuagphong, Nudchanart Kitcharoen, Srisombat Nawanopparatsakul
The results from this study suggest that butanol extracts of AI were the most promising candidates for biological weed control and might be used as potential natural herbicides or as alternatives for the reduction of chemical herbicides.
Data analysis The inhibition percent relative growth rate was selected as the endpoint for phytotoxicity test.
The data of average growth rate and % inhibition of growth rate compared with negative control (normal growth in culture medium) were shown in table 1.
31.12 400 0.1764 ± 0.0111 17.23 200 0.1836 ± 0.0107 13.84 100 0.1863 ± 0.0107 12.56 Dichloromethane 600 0.1567 ± 0.0095 39.53 400 0.1718 ± 0.0101 33.73 200 0.2091 ± 0.0275 19.33 100 0.2505 ± 0.0042 3.34 Butanol 400 -0.1040 ± 0.2450 140.12 200 0.0590 ± 0.0434 77.24 100 0.0879 ± 0.0353 66.08 Derris elliptica Methanol 1000 -0.0449 ± 0.0184 119.12 800 0.1687 ± 0.0505 28.15 600 0.2261 ± 0.0167 3.72 400 0.2555 ± 0.0135 -8.83 200 0.2597 ± 0.0139 -10.60 100 0.2609 ± 0.0114 -11.10 Nicotiana tabacum Methanol 1000 0.0456 ± 0.0079 78.58 800 0.1416±0.0380 33.56 600 0.1468±0.0115 31.12 400 0.1764±0.0111 17.23 200 0.1836±0.0107 13.84 100 0.1863±0.0107 12.56 Dichloromethane 1000 0.0756±0.0223 64.54 800 0.1956±0.0189 8.20 600 0.2419±0.0098 -13.50 400 0.2773±0.0096 -30.14 200 0.2941±0.0088 -38.00 100 0.2974 ± 0.0352 -39.58 Butanol 400 -0.3209 ± 0.1143 250.56 200 0.0865 ± 0.0514 59.42 100 0.1554 ± 0.0409 27.08 AI: Dichloromethane 800, 1000; AI & NI butanol 600-1000 = no growth, all of duckweed were died (data
Finding from this study suggest that butanol extract of AI is the most promising candidates for biological weed control and might be used as potential natural herbicides or as alternative material for the reduction amount of chemical herbicides to be used.
Data analysis The inhibition percent relative growth rate was selected as the endpoint for phytotoxicity test.
The data of average growth rate and % inhibition of growth rate compared with negative control (normal growth in culture medium) were shown in table 1.
31.12 400 0.1764 ± 0.0111 17.23 200 0.1836 ± 0.0107 13.84 100 0.1863 ± 0.0107 12.56 Dichloromethane 600 0.1567 ± 0.0095 39.53 400 0.1718 ± 0.0101 33.73 200 0.2091 ± 0.0275 19.33 100 0.2505 ± 0.0042 3.34 Butanol 400 -0.1040 ± 0.2450 140.12 200 0.0590 ± 0.0434 77.24 100 0.0879 ± 0.0353 66.08 Derris elliptica Methanol 1000 -0.0449 ± 0.0184 119.12 800 0.1687 ± 0.0505 28.15 600 0.2261 ± 0.0167 3.72 400 0.2555 ± 0.0135 -8.83 200 0.2597 ± 0.0139 -10.60 100 0.2609 ± 0.0114 -11.10 Nicotiana tabacum Methanol 1000 0.0456 ± 0.0079 78.58 800 0.1416±0.0380 33.56 600 0.1468±0.0115 31.12 400 0.1764±0.0111 17.23 200 0.1836±0.0107 13.84 100 0.1863±0.0107 12.56 Dichloromethane 1000 0.0756±0.0223 64.54 800 0.1956±0.0189 8.20 600 0.2419±0.0098 -13.50 400 0.2773±0.0096 -30.14 200 0.2941±0.0088 -38.00 100 0.2974 ± 0.0352 -39.58 Butanol 400 -0.3209 ± 0.1143 250.56 200 0.0865 ± 0.0514 59.42 100 0.1554 ± 0.0409 27.08 AI: Dichloromethane 800, 1000; AI & NI butanol 600-1000 = no growth, all of duckweed were died (data
Finding from this study suggest that butanol extract of AI is the most promising candidates for biological weed control and might be used as potential natural herbicides or as alternative material for the reduction amount of chemical herbicides to be used.
Online since: September 2008
Authors: Uno Mäeorg, D. Brandell, Andres Punning, Janno Torop, Maarja Kruusmaa, Alvo Aabloo, Urmas Johanson
It is clear from the data presented in Table 1 that the Cu-coated membranes display an opposite
phenomenon compared with those only coated by Pt.
Although the variations in resistance per unit length is large, and fluctuates severely upon switching the polarity for 100 cycles, it is also clear from the data presented in Table 1 that the final resistance values of the electrodes are lower than the initial values prior to cycling.
In fact, the data in Table 1 suggests that the electrode conductivity is continuously improving upon cycling.
Although the resistance data for the Cu-coated IPMC-s look promising, we observed unwanted side-reactions during our measurements.
SEM data shows that the actuator contains a lot of holes in polymer matrix.
Although the variations in resistance per unit length is large, and fluctuates severely upon switching the polarity for 100 cycles, it is also clear from the data presented in Table 1 that the final resistance values of the electrodes are lower than the initial values prior to cycling.
In fact, the data in Table 1 suggests that the electrode conductivity is continuously improving upon cycling.
Although the resistance data for the Cu-coated IPMC-s look promising, we observed unwanted side-reactions during our measurements.
SEM data shows that the actuator contains a lot of holes in polymer matrix.
Online since: March 2011
Authors: Balder Ortner
The Matrix Method for Data Evaluation and its Advantages in Comparison to the sin2ψ and Similar Methods
Balder Ortner1, a,
1Schillerstraße 34, 8700 Leoben, AUSTRIA
aBalder.Ortner@aon.at
Keywords: X-ray stress measurement, X-ray elastic factors, matrix method, sin2ψ method.
This article gives an overview of different methods for data treatment in x-ray stress measurement, and how these methods should be replaced with the matrix method, which in general is more versatile, more accurate and, in most cases, also easier to handle.
Accuracy of the results – how strong is the correlation between measurement errors and errors of other input data and errors of the results.
The loss in accuracy by using one of the older methods is quantified by a number AR (accuracy reduction), which means (ΔσS – ΔσM)/ΔσM in percent.
Simplicity – whether data evaluation is a straightforward or a complicated procedure.
This article gives an overview of different methods for data treatment in x-ray stress measurement, and how these methods should be replaced with the matrix method, which in general is more versatile, more accurate and, in most cases, also easier to handle.
Accuracy of the results – how strong is the correlation between measurement errors and errors of other input data and errors of the results.
The loss in accuracy by using one of the older methods is quantified by a number AR (accuracy reduction), which means (ΔσS – ΔσM)/ΔσM in percent.
Simplicity – whether data evaluation is a straightforward or a complicated procedure.
Online since: September 2014
Authors: Danuta Szeliga, Jan Kusiak, Krzysztof Regulski
Authors demonstrated in previous publications that data mining methods could reduce data demand even to 1% in comparison do SA in the task of investigating of importance of the predictors.
In this article we present how data mining algorithms can discover relationships in large datasets.
Decision tree divides a training set into partitions to the point where each partition contains data belonging to one class, or, if within the partition is dominated by data belonging to one class.
All cases of data are divided among v groups Z1, Z2, ..., Zv of the same cardinality, as far as possible.
To have certainty of results we used 10% of data - sample was drawn randomly.
In this article we present how data mining algorithms can discover relationships in large datasets.
Decision tree divides a training set into partitions to the point where each partition contains data belonging to one class, or, if within the partition is dominated by data belonging to one class.
All cases of data are divided among v groups Z1, Z2, ..., Zv of the same cardinality, as far as possible.
To have certainty of results we used 10% of data - sample was drawn randomly.
Online since: October 2007
Authors: John F. Humphreys, Pete S. Bate, J. Dennis
SEM imaging and EBSD data has then made it possible to characterize the influence of particle
dissolution and grain boundary misorientation on the onset of abnormal grain growth.
The driving force for this process is the reduction of stored energy, via a reduction in grain boundary area.
Abnormal grain coarsening may occur as a result of the dissolution and coarsening of pinning particles, leading to a localised reduction in pinning pressure [3, 7-10].
EBSD data obtained from samples containing island grains present inside abnormally large grains made it possible to measure the misorientation between such grains.
Analysis of the EBSD data made it possible to suggest possible original locations of these newly formed abnormally large grains.
The driving force for this process is the reduction of stored energy, via a reduction in grain boundary area.
Abnormal grain coarsening may occur as a result of the dissolution and coarsening of pinning particles, leading to a localised reduction in pinning pressure [3, 7-10].
EBSD data obtained from samples containing island grains present inside abnormally large grains made it possible to measure the misorientation between such grains.
Analysis of the EBSD data made it possible to suggest possible original locations of these newly formed abnormally large grains.
Online since: October 2010
Authors: Shao Hui Chen, Jin Hua Ruan, Chong Xiang Yue, Sen Dong Gu, Wen Bin He, Liwen Zhang
Introduction
The vertical-horizontal (V-H) rolling process is an important method for width reduction during a hot
plate rolling process [1, 2].
Shun et al. [6] have investigated the thickness distribution of different slabs during edging process and the width spread after thickness reduction following the edging.
Fig. 2(a) is an example of the calculated displacement- X distribution after edging with a reduction amount of 60mm during the pass 4, and Fig. 2(b) is the displacement-Z distribution.
When edging is followed by a reduction in thickness, the plate width spread will occur, including the spread of the bulges and the spread due to the reduction in thickness excluding the bulging spread.
Acknowledgements The authors would like to acknowledge the financial support and production data received from Jiangsu Shagang Group.
Shun et al. [6] have investigated the thickness distribution of different slabs during edging process and the width spread after thickness reduction following the edging.
Fig. 2(a) is an example of the calculated displacement- X distribution after edging with a reduction amount of 60mm during the pass 4, and Fig. 2(b) is the displacement-Z distribution.
When edging is followed by a reduction in thickness, the plate width spread will occur, including the spread of the bulges and the spread due to the reduction in thickness excluding the bulging spread.
Acknowledgements The authors would like to acknowledge the financial support and production data received from Jiangsu Shagang Group.
Online since: March 2015
Authors: Ya Li Wang, Zi Ming Wang, Su Ping Cui, Qiu Rui Lv, Qian Jin Mao
The reductions of net radiation heat flux can reach to 279.57W/m2.
Especially for the roofs, the reduction is about 9.95Wh /m2 per day and the energy use reducing rate is up to 67.7%.
Reductions of temporary buildings are 83.83kWh and the value is 1490.03 kWh to the temporary factory buildings in the summer and winter.
So the data can only explain a main tendency of the energy saving effect.
Conclusions When the heat-reflective coating was used on building envelop, the roof has the maximum reduction of net radiation heat flux.
Especially for the roofs, the reduction is about 9.95Wh /m2 per day and the energy use reducing rate is up to 67.7%.
Reductions of temporary buildings are 83.83kWh and the value is 1490.03 kWh to the temporary factory buildings in the summer and winter.
So the data can only explain a main tendency of the energy saving effect.
Conclusions When the heat-reflective coating was used on building envelop, the roof has the maximum reduction of net radiation heat flux.