http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Michel, Eric,Hernandez, Daniel,Cho, Min Hyoung,Lee, Soo Yeol Published for the American Association of Physicis 2014 Medical physics Vol.41 No.10
<P>To validate the use of adaptive nonlinear filters in reconstructing conductivity and permittivity images from the noisy B1(+) maps in electrical properties tomography (EPT).</P>
Bacterial Logic Devices Reveal Unexpected Behavior of Frameshift Suppressor tRNAs
Sawyer, Eric M.,Barta, Cody,Clemente, Romina,Conn, Michel,Davis, Clif,Doyle, Catherine,Gearing, Mary,Ho-Shing, Olivia,Mooney, Alyndria,Morton, Jerrad,Punjabi, Shamita,Schnoor, Ashley,Sun, Siya,Suresh, Korean Society for Bioinformatics 2012 Interdisciplinary Bio Central (IBC) Vol.4 No.3
Introduction: We investigated frameshift suppressor tRNAs previously reported to use five-base anticodon-codon interactions in order to provide a collection of frameshift suppressor tRNAs to the synthetic biology community and to develop modular frameshift suppressor logic devices for use in synthetic biology applications. Results and Discussion: We adapted eleven previously described frameshift suppressor tRNAs to the BioBrick cloning format, and built three genetic logic circuits to detect frameshift suppression. The three circuits employed three different mechanisms: direct frameshift suppression of reporter gene mutations, frameshift suppression leading to positive feedback via quorum sensing, and enzymatic amplification of frameshift suppression signals. In the course of testing frameshift suppressor logic, we uncovered unexpected behavior in the frameshift suppressor tRNAs. The results led us to posit a four-base binding hypothesis for the frameshift suppressor tRNA interactions with mRNA as an alternative to the published five-base binding model. Conclusion and Prospects: The published five-base anticodon/codon rule explained only 17 of the 58 frameshift suppression experiments we conducted. Our deduced four-base binding rule successfully explained 56 out of our 58 frameshift suppression results. In the process of applying biological knowledge about frameshift suppressor tRNAs to the engineering application of frameshift suppressor logic, we discovered new biological knowledge. This knowledge leads to a redesign of the original engineering application and encourages new ones. Our study reinforces the concept that synthetic biology is often a winding path from science to engineering and back again; scientific investigations spark engineering applications, the implementation of which suggests new scientific investigations.
Study of Water Diffusion in PE-SiO2 Nanocomposites by Dielectric Spectroscopy
Hugues Couderc,Eric David,Michel Fréchette 한국전기전자재료학회 2014 Transactions on Electrical and Electronic Material Vol.15 No.6
In recent years, researchers have extensively investigated polymers filled with inorganic nanoparticles becausethese materials present improved physical properties relative to those of conventional unfilled polymers. Oxides,silica in particular, are the most commonly used inorganic particles because they possess good properties and canbe fabricated at a low cost. However, oxides are hydrophilic in nature, and this leads to the presence of water at theinterface between the nanoparticles and the polymer matrix. Due to the predominance of particle-matrix interfaces innanocomposites, the presence of water at the interlayer region can be problematic. Moreover, the hydrophobic natureof most polymers, particularly for polyolefins such as polyethylene, may make it difficult to remove this interfacialwater. In this paper, as-received and moistened samples of agglomerated nanosilica/polyethylene were dried usingan isothermal treatment at 60℃, and the efficacy of this treatment was studied using dielectric spectroscopy. TheMaxwell-Wagner-Sillars relaxation peaks were observed to shift to lower frequencies by three decades, and this waslinked to a modification of the water content, due to drying, at the interfaces between silica and polyethylene and atthe interfaces within the nanosilica agglomerates. The evolution of the extracted retardation time is explained by thenanosilica hydrophily and the free volume introduced by the nanoparticles.
Insect fatty acids: A comparison of lipids from three Orthopterans and Tenebrio molitor L. larvae
Aman Paul,Michel Frederich,Rudy Caparros Megido,Taofic Alabi,PriyankaMalik,Roel Uyttenbroeck,Frederic Francis,Christophe Blecker,Eric Haubruge,Georges Lognay,Sabine Danthine 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.2
In order to explore some potential insect sources of food lipids, the lipid compositions of three Orthopterans (Acheta domesticus, Conocephalus discolor and Chorthippus parallelus) were analyzed and compared with those of Tenebrio molitor larvae. A. domesticus, Co. discolor, Ch. parallelus and T. molitor larvae were found to contain approximately 15%, 13%, 10% and 32% lipids on dryweight, respectively. The lipids fromthree Orthopterans contain much higheramounts of essential fatty acids than those of T.molitor larvae. The twoOrthopterans of the suborder Ensifera i.e., A. domesticus and Co. discolor contain linoleic acid inmajor quantities,while Ch. parallelus of the suborder Caelifera, contain α-linolenic acid in major quantities. The consumption of linoleic and α-linolenic fatty acid is linked with numerous health promoting effects. The factors that contribute to differences in fatty acid profiles of these insects are being discussed. At last the nutritional parameters including polyunsaturated to saturated and omega 6 to omega 3 fatty acid ratios of these insect lipids are also being discussed to understand the potential role of these lipids in human nutrition.
Study of Water Diffusion in PE-SiO<sub>2</sub> Nanocomposites by Dielectric Spectroscopy
Couderc, Hugues,David, Eric,Frechette, Michel The Korean Institute of Electrical and Electronic 2014 Transactions on Electrical and Electronic Material Vol.15 No.6
In recent years, researchers have extensively investigated polymers filled with inorganic nanoparticles because these materials present improved physical properties relative to those of conventional unfilled polymers. Oxides, silica in particular, are the most commonly used inorganic particles because they possess good properties and can be fabricated at a low cost. However, oxides are hydrophilic in nature, and this leads to the presence of water at the interface between the nanoparticles and the polymer matrix. Due to the predominance of particle-matrix interfaces in nanocomposites, the presence of water at the interlayer region can be problematic. Moreover, the hydrophobic nature of most polymers, particularly for polyolefins such as polyethylene, may make it difficult to remove this interfacial water. In this paper, as-received and moistened samples of agglomerated nanosilica/polyethylene were dried using an isothermal treatment at $60^{\circ}C$, and the efficacy of this treatment was studied using dielectric spectroscopy. The Maxwell-Wagner-Sillars relaxation peaks were observed to shift to lower frequencies by three decades, and this was linked to a modification of the water content, due to drying, at the interfaces between silica and polyethylene and at the interfaces within the nanosilica agglomerates. The evolution of the extracted retardation time is explained by the nanosilica hydrophily and the free volume introduced by the nanoparticles.
Guo, Meng,Frehchette, Michel,David, Eric,Demarquette, Nicole Raymonde The Korean Institute of Electrical and Electronic 2015 Transactions on Electrical and Electronic Material Vol.16 No.2
High-energy ball milling was tested as a method for producing Ultra High Molecular Weight Polyethylene (UHMWPE)- based nanodielectrics containing 1 wt% and 5 wt% OctaIsoButylPOSS (OibPOSS). Qualitative and quantitative evaluations were used to explore the compatibility between OibPOSS and PE. Several ball milling variables were optimized in a bid to achieve UHMWPE/OibPOSS nanodielectrics. The morphology, as well as the thermal and the dielectric properties of the samples, were characterized by scanning electron microscopy, thermogravimetric analysis, broadband dielectric spectroscopy, and progressive-stress breakdown tests. The results showed that (i) ball milling was an effective method for producing UHMWPE/OibPOSS dielectric composites, but appeared ineffective in dispersing OibPOSS at the nanoscale, and (ii) the resulting UHMWPE/OibPOSS dielectric composites presented thermal and dielectric properties similar to those of neat UHMWPE.
A Tool Box to Evaluate the Phased Array Coil Performance Using Retrospective 3D Coil Modeling
Marlon Perez,Daniel Hernandez,Eric Michel,조민형,이수열 대한자기공명의과학회 2014 Investigative Magnetic Resonance Imaging Vol.18 No.2
Purpose : To efficiently evaluate phased array coil performance using a software tool box with which we can make visualcomparison of the sensitivity of every coil element between the real experiment and EM simulation. Materials and Methods: We have developed a C++- and MATLAB-based software tool called Phased Array Coil Evaluator(PACE). PACE has the following functions: Building 3D models of the coil elements, importing the FDTD simulation results,and visualizing the coil sensitivity of each coil element on the ordinary Cartesian coordinate and the relative coil positioncoordinate. To build a 3D model of the phased array coil, we used an electromagnetic 3D tracker in a stylus form. Aftermaking the 3D model, we imported the 3D model into the FDTD electromagnetic field simulation tool. Results: An accurate comparison between the coil sensitivity simulation and real experiment on the tool box platform hasbeen made through fine matching of the simulation and real experiment with aids of the 3D tracker. In the simulationand experiment, we used a 36-channel helmet-style phased array coil. At the 3D MRI data acquisition using the spoiledgradient echo sequence, we used the uniform cylindrical phantom that had the same geometry as the one in the FDTDsimulation. In the tool box, we can conveniently choose the coil element of interest and we can compare the coil sensitivitieselement-by-element of the phased array coil. Conclusion: We expect the tool box can be greatly used for developing phased array coils of new geometry or for periodicmaintenance of phased array coils in a more accurate and consistent manner.
Yun Zhuang,Leonard Borucki,Ara Philipossian,Eric Dien,Mohamed Ennahali,George Michel,Bernard Laborie,Yun Zhuang,Manish Keswani,Daniel Rosales-Yeomans,Hyosang Lee,Ara Philipossian 한국전기전자재료학회 2007 Transactions on Electrical and Electronic Material Vol.8 No.2
In this study, a novel slurry containing ceria as the abrasive particles was analyzed in terms of its frictional, thermal and kinetic attributes for interlayer dielectric (ILD) CMP application. The novel slurry was used to polish 200-mm blanket ILD wafers on an IC1000TM K-groove pad with in-situ conditioning. Polishing pressures ranged from 1 to 5 PSI and the sliding velocity ranged from 0.5 to 1.5 m/s. Shear force and pad temperature were measured in real time during the polishing process. The frictional analysis indicated that boundary lubrication was the dominant tribological mechanism. The measured average pad leading edge temperature increased from 26.4 to 38.4 °C with the increase in polishing power. The ILD removal rate also increased with the polishing power, ranging from 400 to 4000 A/min. The ILD removal rate deviated from Prestonian behavior at the highest p´V polishing condition and exhibited a strong correlation with the measured average pad leading edge temperature. A modified two-step Langmuir-Hinshelwood kinetic model was used to simulate the ILD removal rate. In this model, transient flash heating temperature is assumed to dominate the chemical reaction temperature. The model successfully captured the variable removal rate behavior at the highest p´V polishing condition and indicates that the polishing process was mechanical limited in the low p´V polishing region and became chemically and mechanically balanced with increasing polishing power.