2promising characteristics of ultra high field
Báo cáo hóa học: " Selective area epitaxy of ultra-high density InGaN quantum dots by diblock copolymer lithography" doc
... Characteristics of Staggered InGaN Quantum Well Lasers J Appl Phys 2010, 107:113110 14 Zhang J, Zhao H, Tansu N: Effect of Crystal -field Split-off Hole and Heavyhole Bands Crossover on Gain Characteristics ... height of 1.84 nm and dot diameter of about 25 nm, and these results are in good agreement with those of the nanopatterns employed in the studies The height and the size of the cross-sectional profiles ... on sample A after removal of SiNx: (a) AFM scan with the scale of 0.5 μm × 0.5 μm; (b) the corresponding height and size of the cross-sectional profiles The AFM image of the InGaN QDs grown on...
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Báo cáo hóa học: " Toward nanofluids of ultra-high thermal conductivity" doc
... the continuous phase is made of the higher-conductivity material The morphology dependence of nanofluid’s conductivity has been recently examined in detail by either of the two approaches: the ... diffusivity of nanofluids, respectively The computations of kbb, kss, kbs, and ksb are available in [27,28] for some typical nanofluids The coupled-transport contribution to the nanofluid thermal ... conductivity, the term (kbs + ksb), can be as high as 10% of the of the overall thermal conductivity [27,28] The more striking effect of the coupled transport on nanofluid heat conduction can be found...
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Fire resistance of ultra high strength concrete filled steel tubular columns
... Behavior of High Strength Steel at Elevated Temperatures 30 3.1 Overview 30 3.2 Chemical Compositions of High Strength Steel 30 3.3 Microstructure of High Strength Steel at High ... Summary 45 Chapter Behavior of Ultra- High Strength Concrete after Heating 58 4.1 Overview 58 4.2 Effect of Types of Fibers on Prevention of Spalling 58 4.2.1 Test Specimens ... effects of strengths of steel and concrete on the fire resistance time of CFST columns Analysis results showed that the fire resistance time of columns with UHSC was slightly higher than that of columns...
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Computer modeling and simulation of ultra high density perpendicular recording processes
... Switching Field .117 5.3.4 Write Field Distribution versus Design Parameters .115 5.3.3 5.4 Effect of Soft Underlayer on Write Field Performance 110 Sensitivity Analysis of Write Field Performance ... Analytical Solution of Write Field 98 Sensitivity Analysis of Write Field with respect to Design Parameters for Perpendicular Recording Heads 109 5.3.1 5.3.2 Effect of Write Field Distribution ... University of Singapore I Acknowledgements modest way of showing my gratitude to them National University of Singapore II Table of Contents Table of Contents Acknowledgements I Table of...
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Size dependent mechanical behavior of ultra high performance fiber reinforced concrete
... behavior of ultra- high- performance fiber-reinforced concretes with steel fibers Conference of Korea Concrete Institute, Jeju, Spring 2014, pp 945-946 [24] Graybeal B Compressive behavior of ultra- high- performance ... Effect of softening slope E1 on flexural parameters of tensile strainsoftening UHPFRCs with no sudden load drop 106 Fig 4.9 – Effect of pc / cc ratio on flexural parameters of tensile ... Effects of gauge length on tensile parameters of UHPFRC .73 Fig 3.8 – Effects of section area on tensile parameters of UHPFRC 75 Fig 3.9 – Effects of volume on tensile parameters of UHPFRC...
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Chapter 4 characteristics of field effect transistors
... 4: Characteristics Field- Effect Transistor CHAPTER 4: CHARACTERISTICS OF FIELD- EFFECT TRANSISTOR 4.1 INTRODUCTION The operation of the field- effect transistor (FET) can be explained in terms of ... therefore called unipolar Two kinds of field- effect devices are widely used: the junction fieldeffect transistor (JFET) and the metal-oxide semiconductor field- effect transistor (MOSFET) 4.2 ... Characteristics Field- Effect Transistor Fig 4-2 JFET terminal characteristics The drain current shows an approximate square-law dependence on source-to-gate voltage for constant values of vDS in the pinchoff...
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Báo cáo hóa học: " A Study on Field Emission Characteristics of Planar Graphene Layers Obtained from a Highly Oriented Pyrolyzed Graphite Block" potx
... graphene sheets The field emission properties of graphene need further investigation in terms of the number of graphene layers and crystallographic arrangement of the carbon lattice In the near future, ... Fig Graphene sample a optical image of graphene sheets on SiO2 The color of graphene sheets determines thickness of the graphene layer Scale bar: lm b SEM image of a graphene sample with tungsten ... following the behavior of the Fowler–Nordheim relationship The field emission current fluctuated for applied voltages higher than 33 V Figure 5b shows F–N curves obtained as a result of field emission...
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Báo cáo hóa học: " Research Article Design of Large Field-of-View High-Resolution Miniaturized Imaging System" potx
... 90◦ (for a total FOV of 180◦ ) in (2) gives K = 25 This completes the design of the high FOV optical system Object surface Center of lens O α R θ Z Figure 7: Field of view of single lenslet 3.4 ... : FOV of system θ : FOV of lens θFOV = Kϕ + θ ϕ = D/R Figure 2: Structure of the large FOV imaging system using lenslets on a curved surface the amount of overlap between the LR images of neighboring ... explanations of the other quantities can be found in any standard book on optics [13, 14] The following two factors highlight the limitations of miniaturized imaging systems (1) The ability of the...
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Báo cáo khoa học: "Towards construction of an ultra high density linkage map for Pinus pinaster" pdf
... some associations of linkage groups of our map with those of different pine species MATERIALS AND METHODS fragments, estimation of recombination frequencies, and determination of linear order between ... progeny trees were established in the field by AFOCEL in 1990 A total of 80 out of the 129 progeny genotypes, established in the AFOCEL experimental stands of Troussas and Arsague (Landes; SW, ... obtained Approximately 39% of the segregating fragments were specific for either one parent of the cross, while 22% of the fragments were present in both parents Around 16% of the fragments showed...
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Báo cáo y học: "Fluvoxamine may prevent onset of psychosis: a case report of a patient at ultra-high risk of psychotic disorde" ppt
... Fluvoxamine may prevent onset of psychosis: a case report of a patient at ultra- high risk of psychotic disorder Shigenori Tadokoro1,2,*, Nobuhisa Kanahara1, ... as patients at ultra- high risk (UHR) of psychotic disorder, from transitioning to psychosis However, the mechanism of such an effect is still unknown Methods: We report the case of a 19-year-old ... Masaomi Iyo1,3 Department of Psychiatry, Chiba University Graduate School of Medicine, Chiba, Japan Department of Psychiatry, Sodegaura Satsukidai Hospital, Chiba, Japan Division of Clinical Neuroscience,...
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Báo cáo y học: " Impairment of chondrocyte biosynthetic activity by exposure to 3-tesla high-field magnetic resonance imaging is temporar" pptx
... analyzed for intensity of staining By the use of Quantity One v 4.5.2 software (Bio-Rad Laboratories, Hercules, CA, USA), we determined color densities of 20 randomly selected areas of both the pericellular ... 123.3 c.p.m./µg of hydroxyproline; p = 0.45; Figure 5b) To determine whether these effects were a unique property of high- energy fields, such as a 3-tesla EMF, we tested the influence of a 1.5-tesla ... therapy – a review of the literature Acta Med Austriaca 2000, 27:61-68 Trock D, Bollet A, Markoll R: The effect of pulsed electromagnetic fields in the treatment of osteoarthritis of the knee and...
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Báo cáo y học: "Individual, family and offence characteristics of high risk childhood offenders: Comparing non-offending, one-time offending and re-offending Dutch-Moroccan migrant children in the Netherlands" pdf
... re-offenders/one-time offenders d =difference between re-offenders and one-time offenders Table Offence characteristics of childhood one-time offenders and re-offenders One-time offenders Re-offenders ... type of first offence and seriousness of first offence between one-time offenders and re-offenders Re-offenders were slightly older at their first arrest and less often committed their offence ... non-delinquent, one-time offending and re-offending Dutch-Moroccan boys In addition, offence characteristics between one-time offenders and re-offenders are compared Given the high- risk profile of Dutch-Moroccan...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 1
... through these years ii Table of Contents Table of Contents ACKNOWLEDGEMENTS TABLE OF CONTENTS ABSTRACT I III VII LIST OF TABLES IX LIST OF FIGURES X LIST OF ABBREVIATIONS LIST OF SYMBOLS XV XVII CHAPTER ... PHYSICS OF FIELD EMISSION 20 2.1 Field Emission and Fowler-Nordheim Theory 20 2.2 Field Emission from Semiconductors 23 2.3 Influencing Parameters of Field Emission 25 References 29 iii Table of Contents ... References 70 CHAPTER FIELD EMISSION CHARACTERISTICS OF METAL OXIDE ULTRATHIN FILMS COATED CARBON NANOTUBES CORE-SHELL NANOSTRUCTURES 72 iv Table of Contents 5.1 FE Study of Molybdenum Oxide Thin...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 2
... constant, Ø is the emission mass, barrier height of the emitter F is the local field, ε0 is the permittivity of free space, emitters, 21 Chapter Physics of Field Emission and t(y) and υ(y) are the Nordheim ... density versus applied field (J-E) characteristics of the specimen The corresponding Fowler–Nordheim (F-N) plot is shown in the inset 2.2 Field Emission from Semiconductors Field emission was once ... the FE performance of the semiconductors 23 Chapter Physics of Field Emission Fig 2.3 Energy band bending near the surface of a semiconductor induced by the external electrical field Ec represents...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 3
... The use of a magnetic field in the magnetrons behind the metal target is capable of trapping electrons near cathode such that the plasma density will be much higher, often by an order of magnitude ... morphologies of materials It takes images of the sample surface by scanning with high- energy beam of electrons in a raster scan pattern The high- energy electrons are usually emitted via field emission, ... spectrum of a mixture of elements is approximately the sum of the peaks of the individual constituents Generally, identification of chemical states can be made from exact measurements of peak...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 4
... some of the heat energy; (2) Vertically-aligned CNTs can be obtained due to the existence of electric field during growth process; (3) This technique is simple, cheap, high yield, and capable of ... growth Therefore, the size of the catalyst particles determines the size of the as-grown CNTs, as well as their locations [4] The advantages of the catalytic growth of CNTs are that long nanotubes ... amorphous carbon, which is the product of the thermal deposition of hydrocarbon [3] 52 Chapter Synthesis of Vertically-Aligned Carbon Nanotubes In terms of other CNT growth approaches, solar...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 6a
... upper portion of the CNTs The entire coating of the CNT walls is highly likely prevented because of the high density of CNTs When these films are thicker than 200 nm, the tips of these nanotubes ... 1s core level XPS spectrum of the film Two peaks with the binding energy (BE) of 284.5 and 285.2 eV confirm a high sp3 content of 126 Chapter Field Emission Study of Hydrogenated Tetrahedral ... confirms high sp3 content of the DLC films 127 Chapter Field Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell Nanostructures 6.3.3 Surface Morphology of...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 6b
... surface conductivity of diamond [24-28] Recently, surface hydrogenation has been found to be capable of significantly reducing the work functions of DLC thin films [29] Theoretically, higher conductivity ... sharply reduced the local electric field on the emission sites As the ta-C mostly consists of sp3 carbon bonds while CNTs are rich in sp2 bonds, deposition of ta-C onto the CNT surface would ... Chapter Field Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell Nanostructures with the increase of ambient temperature during...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 6c
... heights of the three kinds of samples As the ta-C coated CNTs and the hydrogenated samples are merely the pristine CNTs with ultrathin film coating on the tube surface, the β values of these ... exactly consistent with the decreasing trend of the threshold fields exhibited by these samples during FE process, 142 Chapter Field Emission Study of Hydrogenated Tetrahedral Amorphous Carbon ... is reasonable Namely, the geometry of these three kinds of samples has nearly equal contribution to the electron emission The mechanism of the FE enhancement of the 10 s hydrogenated sample is...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 7
... discussion of this study have provided a better understanding of the FE enhancement mechanism of the multilayer structured field emitters The main factors influencing the FE properties of the composite ... oxides to modify the surface of the pristine CNTs, leading to significant enhancement on their FE characteristics In other words, new field emitters with low threshold field have been successfully ... followed by various durations of hydrogen plasma treatments FE characteristics of these specimens were tested to study whether these steps could enhance the FE properties of the pristine CNTs Results...
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