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Artículos de revistas sobre el tema "Hot Holes Injection Erasing"

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Publicado: 25 de mayo de 2024

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1

Chen, Shen Li, and Shun Tai Chung. "Charge Programming and Erasing Characteristics of the Submicron Stacked-Gate Flash Cells." Advanced Materials Research 634-638 (January 2013): 2446–49. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.2446.

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A non-Maxwellian hot-carrier generation current model for simulation of charge injection and erasing in the 0.35um flash EEPROM device is presented in this paper. Unlike the conventional model, which is based on the local electric fields in the device, and it accounts for non-local effects resulting from the large variations in electric field in a submicron flash EEPROM. Good agreements between the measured and calculated results in the charge writing and the Fower-Nordheim erasing operations.
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2

Jin, Yuxuan, and Zefeng Chen. "High gain hot-carrier WSe2 phototransistor with gate-tunable responsivity." Advances in Engineering Technology Research 7, no. 1 (2023): 21. http://dx.doi.org/10.56028/aetr.7.1.21.2023.

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Hot-carrier injection at semiconductor/metal interface shows great potentials in infrared photodetection. However, the photoresponsivity of hot-carrier photodetector with diode mode is still limited in the scale of 1 mA/W due to the low injection efficiency of hot carriers and the lack of gain. Here, we demonstrate a high gain hot-carrier WSe2 phototransistor with gate-tunable responsivity. In this device, plasmonic resonances is used to enhance the light absorption of gold nanodisk, which provide hot holes. The hot holes are trapped into WSe2 and recycled in WSe2 channel in lateral direction,
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3

Sun, Lei, Liyang Pan, Huiqing Pang, et al. "Characteristics of Band-to-Band Tunneling Hot Hole Injection for Erasing Operation in Charge-Trapping Memory." Japanese Journal of Applied Physics 45, no. 4B (2006): 3179–84. http://dx.doi.org/10.1143/jjap.45.3179.

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4

Manzini, S., and A. Gallerano. "Avalanche injection of hot holes in the gate oxide of LDMOS transistors." Solid-State Electronics 44, no. 7 (2000): 1325–30. http://dx.doi.org/10.1016/s0038-1101(99)00317-2.

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5

Jeong, Yoon Seong, and Jun Su Park. "Effect of Inlet Compound Angle of Backward Injection Film Cooling Hole." Energies 13, no. 4 (2020): 808. http://dx.doi.org/10.3390/en13040808.

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Backward injection film cooling holes were studied to improve film cooling effectiveness using simple cylindrical holes, and this principle was applied to an actual gas turbine. Although film cooling effectiveness was improved using a backward injection film cooling hole, the backward flow of combustion gas from the backward injection cooling hole was one of the major reasons for cracks in the hot components. To prevent cracks and backward flow in the backward injection film cooling hole, this study changed the inlet compound angle of the backward injection film cooling hole. Numerical analysi
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6

Williamson, J. G., H. van Houten, C. W. J. Beenakker, et al. "Injection of ballistic hot electrons and cool holes in a two-dimensional electron gas." Surface Science 229, no. 1-3 (1990): 303–6. http://dx.doi.org/10.1016/0039-6028(90)90894-e.

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7

Liu, Jian, Mengyao Xu, and Wenxiong Xi. "Effects of Gas Thermophysical Properties on the Full-Range Endwall Film Cooling of a Turbine Vane." Aerospace 10, no. 7 (2023): 592. http://dx.doi.org/10.3390/aerospace10070592.

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To protect turbine endwall from heat damage of hot exhaust gas, film cooling is the most significant method. The complex vortex structures on the endwall, such as the development of horseshoe vortices and transverse flow, affects cooling coverage on the endwall. In this study, the effects of gas thermophysical properties on full-range endwall film cooling of a turbine vane are investigated. Three kinds of gas thermophysical properties models are considered, i.e., the constant property gas model, ideal gas model, and real gas model, with six full-range endwall film cooling holes patterns based
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8

Lin, Y. L., and T. I. P. Shih. "Film Cooling of a Cylindrical Leading Edge With Injection Through Rows of Compound-Angle Holes." Journal of Heat Transfer 123, no. 4 (2001): 645–54. http://dx.doi.org/10.1115/1.1370513.

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Computations, based on the k-ω shear-stress transport (SST) turbulence model in which all conservation equations were integrated to the wall, were performed to investigate the three-dimensional flow and heat transfer about a semi-cylindrical leading edge with a flat afterbody that is cooled by film-cooling jets, injected from a plenum through three staggered rows of compound-angle holes with one row along the stagnation line and two rows along ±25 deg. Results are presented for the surface adiabatic effectiveness, normalized temperature distribution, velocity vector field, and surface pressure
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9

Gustafsson, K. M. Bernhard, and T. Gunnar Johansson. "An Experimental Study of Surface Temperature Distribution on Effusion-Cooled Plates." Journal of Engineering for Gas Turbines and Power 123, no. 2 (2001): 308–16. http://dx.doi.org/10.1115/1.1364496.

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A parametric study of temperature distribution on effusion-cooled plates under conditions typical for combustion chambers was performed using infrared thermography. In this investigation, the effects of different temperature ratios, velocity ratios of the two air streams, the injection hole spacing, inclination angle of the injection holes, and the thermal heat conductivity of the plates were studied. For a given amount of cooling air, the cooling efficiency was found to increase markedly with a reduction in hole spacing, i.e., when the number of holes was increased. Reducing the injection ang
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10

Kafaei, Amir, Fahime Salmani, Esmail Lakzian, Włodzimierz Wróblewski, Mikhail S. Vlaskin, and Qinghua Deng. "The best angle of hot steam injection holes in the 3D steam turbine blade cascade." International Journal of Thermal Sciences 173 (March 2022): 107387. http://dx.doi.org/10.1016/j.ijthermalsci.2021.107387.

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11

Burd, S. W., R. W. Kaszeta, and T. W. Simon. "Measurements in Film Cooling Flows: Hole L/D and Turbulence Intensity Effects." Journal of Turbomachinery 120, no. 4 (1998): 791–98. http://dx.doi.org/10.1115/1.2841791.

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Hot-wire anemometry measurements of simulated film cooling are presented to document the influence of the free-stream turbulence intensity and film cooling hole length-to-diameter ratio on mean velocity and on turbulence intensity. Measurements are taken in the zone where the coolant and free-stream flows mix. Flow from one row of film cooling holes with a streamwise injection of 35 deg and no lateral injection and with a coolant-to-free-stream flow velocity ratio of 1.0 is investigated under free-stream turbulence levels of 0.5 and 12 percent. The coolant-to-free-stream density ratio is unity
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12

Ningaraju, Vivek, Shao Ming Yang, Gene Sheu, Mohammad Amanullah, Erry Dwi Kurniawan, and Subramanyaj. "Improvement of On-Resistance Degradation Induced by Hot Carrier Injection in SOI-LDMOS." Applied Mechanics and Materials 764-765 (May 2015): 521–25. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.521.

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This paper presents how to improve specific o n-state resistance (Ron) induced by the HCI of a SOI LDMOS device. In manufacturing of UHV device, trade-off between on state resistance and breakdown voltage is always present. But with our process design we are able to improve Ron degradation without compromising the-breakdown voltage. In our design the peak electric field is under gate near source side, due to low electric field near drain helps to increase the current flow much better hence it helps to improve Ron and Vth. If the peak field is located near drain side, the hot holes is easy to p
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13

Heiles, Carl. "Clustered Supernovae vs. The Gaseous Disk and Halo: A Rematch." International Astronomical Union Colloquium 120 (1989): 484–93. http://dx.doi.org/10.1017/s0252921100024295.

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ABSTRACT.Recent developments, both observational and theoretical, require a reevaluation of the effects of clustered supernovae on the two-dimensional porosity parameter Q2D and the rates of mass injection into the halo Ṁ of both cold and hot gas. Clustered supernovae produce two types of bubble. Most clusters produce breakthrough bubbles, which do no more than break through the dense gas disk. But large clusters produce enough energy to make blowout bubbles, which blow gas up into the halo. We calculate area filling factors and mass injection rates into the halo for different types of galaxy.
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14

York, William D., and James H. Leylek. "Leading-Edge Film-Cooling Physics—Part III: Diffused Hole Effectiveness." Journal of Turbomachinery 125, no. 2 (2003): 252–59. http://dx.doi.org/10.1115/1.1559899.

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A proven computational methodology was applied to investigate film cooling from diffused holes on the simulated leading edge of a turbine airfoil. The short film-hole diffuser section was conical in shape with a shallow half-angle, and was joined to a plenum by a cylindrical metering section. The diffusion resulted in a film-hole breakout area of 2.5 times that of a cylindrical hole. In the present paper, predictions of adiabatic effectiveness for the cases with diffused holes are compared to results for standard cylindrical holes, and performance is analyzed in the context of extensive flowfi
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15

Haas, W., W. Rodi, and B. Scho¨nung. "The Influence of Density Difference Between Hot and Coolant Gas on Film Cooling by a Row of Holes: Predictions and Experiments." Journal of Turbomachinery 114, no. 4 (1992): 747–55. http://dx.doi.org/10.1115/1.2928028.

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The two-dimensional boundary-layer procedure of Scho¨nung and Rodi [1] for calculating film cooling by a row of holes was extended to account for density differences between hot gas and injected coolant gas. The extensions concern the injection model for leaping over the immediate blowing region in the boundary-layer calculation and also the dispersion model for taking into account three-dimensional effects. The extended model is tested for a density ratio of ρj/ρe ≈ 2 for both flat-plate situations and film cooling on a model turbine blade. The predicted laterally averaged film cooling effect
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16

Heckman, Timothy M., and Philip N. Best. "A Global Inventory of Feedback." Galaxies 11, no. 1 (2023): 21. http://dx.doi.org/10.3390/galaxies11010021.

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Feedback from both supermassive black holes and massive stars plays a fundamental role in the evolution of galaxies and the inter-galactic medium. In this paper, we use available data to estimate the total amount of kinetic energy and momentum created per co-moving volume element over the history of the universe from three sources: massive stars and supernovae, radiation pressure and winds driven by supermassive black holes, and radio jets driven by supermassive black holes. Kinetic energy and momentum injection from jets peaks at z ≈ 1, while the other two sources peak at z ≈ 2. Massive stars
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17

Kuehn, T., Y. Wu, and B. Liu. "Particle Contamination Below a Robot Arm in a Cleanroom." Journal of the IEST 36, no. 5 (1993): 43–51. http://dx.doi.org/10.17764/jiet.2.36.5.dx782n4433225717.

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Experimental velocity and particle concentration data have been obtained near a circular cylinder robot arm in a chamber that simulates a vertical unidirectional flow Class 10 cleanroom. The airflow field around the robot arm has been characterized using a hot wire anemometer. Both mean velocities and turbulence spectral data were obtained. Sodium chloride particles were injected through small holes below the arm to simulate particles generated by moving joints. Results indicate that the turbulent wake near the arm causes an unsymmetrical widespread dispersion of the particles from a single po
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18

Kim, Y. W., and D. E. Metzger. "Heat Transfer and Effectiveness on Film Cooled Turbine Blade Tip Models." Journal of Turbomachinery 117, no. 1 (1995): 12–21. http://dx.doi.org/10.1115/1.2835630.

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In unshrouded axial turbine stages, a small but generally unavoidable clearance between the blade tips and the stationary outer seal allows a clearance gap leakage flow to be driven across the blade tip by the pressure-to-suction side pressure difference. In modern high-temperature machines, the turbine blade tips are often a region prone to early failure because of the presence of hot gases in the gap and the resultant added convection heating that must be counteracted by active blade cooling. The blade tip region, particularly near the trailing edge, is often very difficult to cool adequatel
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19

Imram, Ahmed A., Humam K. Jalghef, and Falah F. Hatem. "The Effect of Using Ramps with Trench Cylindrical Holes on Film Cooling Effectiveness." Wasit Journal of Engineering Sciences 3, no. 2 (2015): 15–27. http://dx.doi.org/10.31185/ejuow.vol3.iss2.37.

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The effect of introducing ramp with a cylindrical slot hole on the film cooling effectiveness has been investigated experimentally and numerically. The film cooling effectiveness measurements are obtained experimentally. A test study was performed at a single mainstream with Reynolds number 76600 at three different coolant to mainstream blowing ratios 1.5, 2, and 3. Numerical simulation is introduced to primarily estimate the best ramp configurations and to predict the behavior of the transport phenomena in the region linked closely to the interaction between the coolant air injection and the
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20

Siddiqui, Muhammad Ehtisham, Ammar A. Melaibari, and Fahad Sarfraz Butt. "Experimental Investigation of Temperature Distribution in a Laminar Boundary Layer over a Heated Flat Plate with Localized Transverse Cold Air Injections." Energies 16, no. 17 (2023): 6171. http://dx.doi.org/10.3390/en16176171.

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This study presents an experimental investigation focused on the interaction between a transverse injection of cold air (blowing) and the boundary layer over a heated flat plate. The flat plate was equipped with a cylindrical coil heater positioned at its center along the flow direction. The constant heat flux was maintained using a variable resistance potentiometer. The flat plate with the heater was mounted inside a subsonic wind tunnel to sustain a constant laminar air flow. The primary objective of this research was to examine the effects of cold air injections through localized holes in t
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21

McGovern, K. T., and J. H. Leylek. "A Detailed Analysis of Film Cooling Physics: Part II—Compound-Angle Injection With Cylindrical Holes." Journal of Turbomachinery 122, no. 1 (1997): 113–21. http://dx.doi.org/10.1115/1.555434.

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Detailed analyses of computational simulations with comparisons to experimental data were performed to identify and explain the dominant flow mechanisms responsible for film cooling performance with compound angle injection, Φ, of 45, 60, and 90 deg. A novel vorticity and momentum based approach was implemented to document how the symmetric, counterrotating vortex structure typically found in the crossflow region in streamwise injection cases, becomes asymmetric with increasing Φ. This asymmetry eventually leads to a large, single vortex system at Φ=90 deg and fundamentally alters the interact
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22

Liu, Kunzi, Li Chen, Tian Luo, et al. "Implementation of electron restriction layer in n-AlGaN toward balanced carrier distribution in deep ultraviolet light-emitting-diodes." Applied Physics Letters 121, no. 24 (2022): 241105. http://dx.doi.org/10.1063/5.0131013.

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The distribution of electrons and holes inside the multiple-quantum wells is highly non-uniform for AlGaN-based deep ultraviolet light-emitting diodes (DUV-LEDs) due to both insufficient hole injection and excessive electron leakage. A key factor to improve the quantum efficiency of DUV-LED is to reduce the proportion of hot electrons in n-AlGaN through carrier deceleration. In this work, we propose a structure design by introducing an additional Al0.55Ga0.45N/Al0.42Ga0.58N superlattice electron restriction layer between the active region and n-AlGaN for electron deceleration. The superlattice
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23

Li, Xianchang, and Ting Wang. "Simulation of Film Cooling Enhancement With Mist Injection." Journal of Heat Transfer 128, no. 6 (2005): 509–19. http://dx.doi.org/10.1115/1.2171695.

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Cooling of gas turbine hot-section components, such as combustor liners, combustor transition pieces, and turbine vanes (nozzles) and blades (buckets), is a critical task for improving the life and reliability of them. Conventional cooling techniques using air-film cooling, impingement jet cooling, and turbulators have significantly contributed to cooling enhancements in the past. However, the increased net benefits that can be continuously harnessed by using these conventional cooling techniques seem to be incremental and are about to approach their limit. Therefore, new cooling techniques ar
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24

Khosru, Quazi Deen Mohd, Naoki Yasuda, Akinori Maruyama, Kenji Taniguchi, and Chihiro Hamaguchi. "Spatial Distribution of Trapped Holes in the Oxide of Metal Oxide Semiconductor Field-Effect Transistors after Uniform Hot-Hole Injection." Japanese Journal of Applied Physics 30, Part 1, No. 12B (1991): 3652–56. http://dx.doi.org/10.1143/jjap.30.3652.

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25

Ligrani, P. M., C. S. Subramanian, D. W. Craig, and P. Kaisuwan. "Effects of Vortices With Different Circulations on Heat Transfer and Injectant Downstream of a Row of Film-Cooling Holes in a Turbulent Boundary Layer." Journal of Heat Transfer 113, no. 1 (1991): 79–90. http://dx.doi.org/10.1115/1.2910555.

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Results are presented that illustrate the effects of single embedded longitudinal vortices on heat transfer and injectant downstream of a row of film-cooling holes in a turbulent boundary layer. Attention is focused on the changes resulting as circulation magnitudes of the vortices are varied from 0.0 to 0.15 m2/s. Mean temperature results are presented that show how injectant is distorted and redistributed by vortices, along with heat transfer measurements and mean velocity surveys. Injection hole diameter is 0.952 cm to give a ratio of vortex core diameter to hole diameter of about 1.5–1.6.
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26

Ahmed, Guelailia, Khorsi Azzeddine, Slimane Sid Ahmed, Blala Hamza, and Slimane Abdelkader. "Effects of Crescent Shaped Block Width and Length on Flow Field and Film Cooling Performance." Trends in Sciences 20, no. 7 (2023): 5339. http://dx.doi.org/10.48048/tis.2023.5339.

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Turbine blades and rocket nozzles can be efficiently protected from combustion chamber exhaust hot gases by film cooling technic. A crescent-shaped block placed downstream of the injection hole can significantly improve cooling effectiveness. The main objective of this research work is to investigate the influence of the crescent-shaped block length and width on film cooling effectiveness. ANSYS CFX was used to conduct analysis of a flat plate configuration with cylindrical holes. Nine configurations of the crescent shaped blocks were considered. For each case, the effect of blowing ratios (0.5
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27

Ganguli, Sagar, Ziwen Zhao, Onur Parlak, Yocefu Hattori, Jacinto Sa, and Alina Sekretareva. "Nano-Impact Single-Entity Electrochemistry Enables Plasmon-Enhanced Electrocatalysis." ECS Meeting Abstracts MA2023-02, no. 54 (2023): 2623. http://dx.doi.org/10.1149/ma2023-02542623mtgabs.

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Plasmon-enhanced electrocatalysis (PEEC), based on a combination of localised surface plasmon resonance excitation and electrochemical bias applied to plasmonic material, can result in improved electrical-to-chemical energy conversion compared to conventional electrocatalysis.1 Here, we demonstrate the advantages of nano-impact single-entity electrochemistry (SEE) over conventional ensemble electrochemical measurements for investigating the intrinsic activity of plasmonic catalysts towards PEEC at the single-particle level using glucose electrooxidation on gold nanoparticles (AuNPs) as a model
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28

Rydholm, H. A. "An Experimental Investigation of the Velocity and Temperature Fields of Cold Jets Injected Into a Hot Crossflow." Journal of Turbomachinery 120, no. 2 (1998): 320–26. http://dx.doi.org/10.1115/1.2841409.

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It is shown here by dimensional analysis that the near-wall flow field of an effusion-cooled combustor can be scaled if the Reynolds, Mach, and Prandtl numbers and the temperature and velocity ratios are kept constant. It is also demonstrated that a practical model experiment can be designed, which fulfills all the scaling laws. A test rig meeting these requirements has been designed, built and tested. The experimental conditions have been chosen to correspond to the conditions usually met in a real effusion-cooled combustion chamber. One geometric configuration has been investigated. This con
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29

Murakami, Fumikazu, Kazunori Serita, Iwao Kawayama, et al. "Probing photocarrier dynamics in a Bi2Te3–Te eutectic p–n junction with a laser terahertz emission microscope." APL Materials 11, no. 3 (2023): 031102. http://dx.doi.org/10.1063/5.0137862.

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Bismuth telluride (Bi2Te3)-based heterostructures have attracted considerable attention owing to their interesting anisotropic properties and expected higher thermoelectric performance. Therefore, exploring the nature of the carrier dynamics in these heterostructures has been an important subject in the design and optimization of advanced materials. In the present study, hot carrier injection and its subsequent spatiotemporal behavior in a multilayered crystalline Bi2Te3–Tellurium (Te) eutectic composite were studied using a laser terahertz (THz) emission microscopy (LTEM). The THz emission el
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30

Li, Shao Hua, Hong Wei Qu, Mei Li Wang, and Ting Ting Guo. "An Experimental Investigation of Flow Characteristics Downstream of Discrete Film Cooling Holes on Turbine Blade Leading Edge." Advanced Materials Research 383-390 (November 2011): 5553–60. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.5553.

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The gas turbine blade was studied on the condition that the mainstream velocity was 10m/s and the Renolds number based on the chord length of the blade was 160000.The Hot-film anemometer was used to measure the two-dimension speed distribution along the downstream of the film cooling holes on the suction side and the pressure side. The conclusions are as follows: When the blowing ratio of the suction side and the pressure side increasing, the the mainstream and the jet injection mixing center raising. Entrainment flow occurs at the position where the blade surface with great curvature gradient
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31

Coward, R. N., N. M. Clark, and S. J. Pinnock. "The Tartan Field, Block 15/16, UK North Sea." Geological Society, London, Memoirs 14, no. 1 (1991): 377–84. http://dx.doi.org/10.1144/gsl.mem.1991.014.01.47.

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AbstractTartan Field lies 118 miles northeast of Aberdeen in UK Block 15/16 on the southern flank of the Witch Ground Graben. The Field consists of two major southerly-dipping rotated fault blocks, the 'Upthrown Block' to the south and the 'Downthrown Block' to the north. The primary reservoir comprises Oxfordian-Kimmeridgian shallow marine sandstone of the Piper Formation deposited during a regional marine transgression. The secondary reservoir consists of Volgian turbidites (the 'Hot Lenses') within the Kimmeridge Clay Formation. The accumulations have been sourced from maturation of the Kim
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32

Yoon, Gilsang, Donghoon Kim, Iksoo Park, Bo Jin, and Jeong-Soo Lee. "Fabrication and Characterization of Nanonet-Channel LTPS TFTs Using a Nanosphere-Assisted Patterning Technique." Micromachines 12, no. 7 (2021): 741. http://dx.doi.org/10.3390/mi12070741.

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We present the fabrication and electrical characteristics of nanonet-channel (NET) low-temperature polysilicon channel (LTPS) thin-film transistors (TFTs) using a nanosphere-assisted patterning (NAP) technique. The NAP technique is introduced to form a nanonet-channel instead of the electron beam lithography (EBL) or conventional photolithography method. The size and space of the holes in the nanonet structure are well controlled by oxygen plasma treatment and a metal lift-off process. The nanonet-channel TFTs show improved electrical characteristics in terms of the ION/IOFF, threshold voltage
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33

Alig, C., A. Prieto, M. Blaña, et al. "The Accretion Mode in Sub-Eddington Supermassive Black Holes: Getting into the Central Parsecs of Andromeda." Astrophysical Journal 953, no. 1 (2023): 109. http://dx.doi.org/10.3847/1538-4357/ace2c3.

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Abstract The inner kiloparsec regions surrounding sub-Eddington (luminosity less than 10−3 in Eddington units, L Edd) supermassive black holes (BHs) often show a characteristic network of dust filaments that terminate in a nuclear spiral in the central parsecs. Here we study the role and fate of these filaments in one of the least accreting BHs known, M31 (10−7 L Edd) using hydrodynamical simulations. The evolution of a streamer of gas particles moving under the barred potential of M31 is followed from kiloparsec distance to the central parsecs. After an exploratory study of initial conditions
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34

Dutta, Sandip, Inderjot Kaur, and Prashant Singh. "Review of Film Cooling in Gas Turbines with an Emphasis on Additive Manufacturing-Based Design Evolutions." Energies 15, no. 19 (2022): 6968. http://dx.doi.org/10.3390/en15196968.

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Film-cooling technology is used in high-temperature components of gas turbines to extend their service lives. Hot-gas path components are susceptible to damage or failure in the absence of film cooling. Much of the optimization research efforts have been focused on film hole shapes, heat/mass transfer measurement techniques, and film cooling performance under various mainstream and coolant side operating conditions. Due to recent rapid advancements in the areas of measurement techniques (e.g., pressure-sensitive paints and fast high-resolution imaging) and metal additive manufacturing (AM), fi
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35

Joy, J., PC Wang, and SCM Yu. "Effect of geometric modification on flow behaviour and performance of reverse flow combustor." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 4 (2018): 1457–71. http://dx.doi.org/10.1177/0954410017752717.

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Numerical investigation had been performed on the reverse flow combustor of a mini gas turbine engine so as to investigate the performance characteristics of the combustor by means of geometry modifications. In order to enhance the thrust performance of the reverse flow combustor, the baseline combustor (Model A) was previously modified by increasing its chamber volume by 15%, the fuel-air ratio (FAR) by 40% and by raising the injection point density to two (Model B). However, the thrust optimization of the baseline combustor resulted in high combustor exit temperature that could potentially d
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36

Geng, Xinjian, Mohamed Abdellah, Robert Bericat Vadell, Matilda Folkenant, Tomas Edvinsson, and Jacinto Sá. "Direct Plasmonic Solar Cell Efficiency Dependence on Spiro-OMeTAD Li-TFSI Content." Nanomaterials 11, no. 12 (2021): 3329. http://dx.doi.org/10.3390/nano11123329.

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The proliferation of the internet of things (IoT) and other low-power devices demands the development of energy harvesting solutions to alleviate IoT hardware dependence on single-use batteries, making their deployment more sustainable. The propagation of energy harvesting solutions is strongly associated with technical performance, cost and aesthetics, with the latter often being the driver of adoption. The general abundance of light in the vicinity of IoT devices under their main operation window enables the use of indoor and outdoor photovoltaics as energy harvesters. From those, highly tra
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37

Ekkad, Srinath V., Shichuan Ou, and Richard B. Rivir. "A Transient Infrared Thermography Method for Simultaneous Film Cooling Effectiveness and Heat Transfer Coefficient Measurements From a Single Test." Journal of Turbomachinery 126, no. 4 (2004): 597–603. http://dx.doi.org/10.1115/1.1791283.

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In film cooling situations, there is a need to determine both local adiabatic wall temperature and heat transfer coefficient to fully assess the local heat flux into the surface. Typical film cooling situations are termed three temperature problems where the complex interaction between the jets and mainstream dictates the surface temperature. The coolant temperature is much cooler than the mainstream resulting in a mixed temperature in the film region downstream of injection. An infrared thermography technique using a transient surface temperature acquisition is described which determines both
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38

Zinger, Elad, Annalisa Pillepich, Dylan Nelson, et al. "Ejective and preventative: the IllustrisTNG black hole feedback and its effects on the thermodynamics of the gas within and around galaxies." Monthly Notices of the Royal Astronomical Society 499, no. 1 (2020): 768–92. http://dx.doi.org/10.1093/mnras/staa2607.

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ABSTRACT Supermassive black holes (SMBHs) that reside at the centres of galaxies can inject vast amounts of energy into the surrounding gas and are thought to be a viable mechanism to quench star formation in massive galaxies. Here, we study the $10^{9-12.5}\, \mathrm{M_\odot }$ stellar mass central galaxy population of the IllustrisTNG simulation, specifically the TNG100 and TNG300 volumes at z = 0, and show how the three components – SMBH, galaxy, and circumgalactic medium (CGM) – are interconnected in their evolution. We find that gas entropy is a sensitive diagnostic of feedback injection.
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39

Misawa, Hiroaki, Tomoya Oshikiri, Xu Shi, and Yoshiki Suganami. "(Invited) Enhanced Water Splitting at Visible Wavelength Region Using Modal Strong Coupled Photoanode and Photocathode." ECS Meeting Abstracts MA2022-02, no. 48 (2022): 1818. http://dx.doi.org/10.1149/ma2022-02481818mtgabs.

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Plasmon-induced hot electron transfer at the metal/semiconductor interface has attracted considerable attention as a novel mechanism to promote artificial photosynthesis under visible and near-infrared irradiation.[1-4] However, a single layer of gold nanoparticles (Au-NPs) cannot efficiently harvest light. Recently, we reported that the modal strong coupling between a Fabry–Pérot (F-P) nanocavity mode and a localized surface plasmon resonance (LSPR) facilitates water splitting reactions.[5] We used a Au-NPs/TiO2/Au-film (ATA) structure as a photoanode. The TiO2/Au-film component of this photo
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40

Kiani, Fatemeh, Alan R. Bowman, Milad Sabzehparvar, Can O. Karaman, Ravishankar Sundararaman, and Giulia Tagliabue. "Transport and Interfacial Injection of d-Band Hot Holes Control Plasmonic Chemistry." ACS Energy Letters, September 19, 2023, 4242–50. http://dx.doi.org/10.1021/acsenergylett.3c01505.

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41

Malé, Quentin, Olivier Vermorel, Frédéric Ravet, and Thierry Poinsot. "Jet ignition prediction in a zero-dimensional pre-chamber engine model." International Journal of Engine Research, May 6, 2021, 146808742110150. http://dx.doi.org/10.1177/14680874211015002.

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This paper presents a multi-chamber, multi-zone engine model to predict the ignition of a lean main chamber by a pre-chamber. The two chambers are connected by small cylindrical holes: the flame is ignited in the pre-chamber, hot gases propagate through the holes and ignite the main chamber through Turbulent Jet Ignition (TJI). The model original features are: (i) separate balance equations for the pre- and main chambers, (ii) a specific model for temperature and composition evolution in the holes and (iii) a DNS-based model to predict the ignition of the main chamber fresh gases by the burnt
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42

Heneka, Christian, Achmed Schulz, Hans-Jörg Bauer, Andreas Heselhaus, and Michael E. Crawford. "Film Cooling Performance of Sharp Edged Diffuser Holes With Lateral Inclination." Journal of Turbomachinery 134, no. 4 (2011). http://dx.doi.org/10.1115/1.4003726.

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An experimental study on film cooling performance of laterally inclined diffuser shaped cooling holes is presented. The measurements have been conducted on a flat plate with coolant ejected from a plenum. The film cooling effectiveness downstream of a row of four laidback fanshaped holes with sharp edged diffusers has been determined by means of infrared (IR) thermography. A variety of geometric parameters has been tested, including the inclination angle, the compound angle, the area ratio, and the pitch to diameter ratio. All tests have been performed over a wide range of engine typical blowi
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43

Makri, Kassandra, Russel Lockett, and Mahesh Jeshani. "Dynamics of post-injection fuel flow in mini-sac diesel injectors part 1: Admission of external gases and implications for deposit formation." International Journal of Engine Research, December 26, 2019, 146808741989542. http://dx.doi.org/10.1177/1468087419895425.

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Samples of unadditised, middle distillate diesel fuel were injected through real-size optically accessible mini-sac diesel injectors into ambient air at common rail pressures of 250 and 350 bar, respectively. High-resolution images of white light scattered from the internal mini-sac and nozzle flow were captured on a high-speed monochrome video camera. Following the end of each injection, the momentum-driven evacuation of fuel liquid from the mini-sac and nozzle holes resulted in the formation of a vapour cloud and bubbles in the mini-sac, and vapour capsules in the nozzle holes. This permitte
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44

Andreini, Antonio, Riccardo Da Soghe, Bruno Facchini, Lorenzo Mazzei, Salvatore Colantuoni, and Fabio Turrini. "Local Source Based CFD Modeling of Effusion Cooling Holes: Validation and Application to an Actual Combustor Test Case." Journal of Engineering for Gas Turbines and Power 136, no. 1 (2013). http://dx.doi.org/10.1115/1.4025316.

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State-of-the-art liner cooling technology for modern combustion chambers is represented by effusion cooling (or full-coverage film cooling). Effusion is a very efficient cooling strategy typically based on the use of several inclined small diameter cylindrical holes, where liner temperature is controlled by the combined protective effect of coolant film and heat removal through forced convection inside each hole. A CFD-based thermal analysis of such components implies a significant computational cost if the cooling holes are included in the simulations; therefore many efforts have been made to
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45

Yang, Junjie, Jin Wei, Yanlin Wu, et al. "Enhanced robustness against hot-electron-induced degradation in active-passivation p-GaN gate HEMT." Applied Physics Letters 124, no. 10 (2024). http://dx.doi.org/10.1063/5.0186902.

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The hot-electron-related reliability is an important issue for GaN power devices under harsh operation condition or environment. These high-energy electrons can scatter toward the device surface or buffer layer, introducing newly generated traps/defects and resulting in the degradation of dynamic ON-resistance (RON). This work investigates the dynamic characteristics in active-passivation p-GaN gate HEMTs (AP-HEMTs) after hot-electron stress (HES). Unlike the dielectric passivation whose dynamic RON performance is often reported to severely worsen as hot-electron-induced defects/traps accumula
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46

Bakueva, Ludmila, Sergei Musikhin, Edward H. Sargent, and Alexander Shik. "Experimental Studies and Physical Model of Efficient, Tunable Injection Using Tunnel-Transparent Dielectric Contacts on Polymer Light-Emitting Devices." MRS Proceedings 734 (2002). http://dx.doi.org/10.1557/proc-734-b7.2.

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ABSTRACTMost conducting polymers used for light-emitting devices have a small electron affinity, creating a high barrier for electron injection resulting in low injection efficiency. To improve injection characteristics, we fabricated and investigated multi-layer contacts with a tunneltransparent dielectric layer of nanometer thickness. Polymer layers were prepared by spin coating, and dielectric and metallic contact layers subsequently grown by vacuum deposition. Samples with such multi-layer cathodes demonstrated a current-voltage characteristic with negative differential resistance. At larg
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47

Shen, Dawen, Miao Cheng, Guangyao Rong, Zhaohua Sheng, Yunzhen Zhang, and Jianping Wang. "Effects of film cooling injection inclination angle on cooling performance in rotating detonation combustors." Physics of Fluids 36, no. 2 (2024). http://dx.doi.org/10.1063/5.0188972.

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Film cooling is a promising thermal management solution for rotating detonation combustors (RDCs) maturing toward long-duration engineering implementation. Aimed at elucidating the interaction between air coolant and rotating detonation waves (RDWs) and assessing the cooling performance, three-dimensional numerical simulations are conducted on an RDC utilizing four different film cooling injection inclination angles and compared to a case without coolant injection. Increasing injection angles from 30° to 90° results in a broader detachment region and deeper penetration, negatively influencing
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48

Kafaei, Amir, Esmail Lakzian, Goodarz Ahmadi, and Sławomir Dykas. "An investigation of finding the best arrangement of hot steam injection holes in the 3D steam turbine blade cascade." Journal of Thermal Analysis and Calorimetry, February 21, 2022. http://dx.doi.org/10.1007/s10973-022-11242-6.

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49

Andrei, Luca, Antonio Andreini, Cosimo Bianchini, Bruno Facchini, Lorenzo Mazzei, and Fabio Turrini. "Investigation on the Effect of a Realistic Flow Field on the Adiabatic Effectiveness of an Effusion-Cooled Combustor." Journal of Engineering for Gas Turbines and Power 137, no. 5 (2015). http://dx.doi.org/10.1115/1.4028676.

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Effusion cooling represents the state of the art of liner cooling technology for modern combustors. This technique consists of an array of closely spaced discrete film cooling holes and contributes to lower the metal temperature by the combined protective effect of coolant film and heat removal through forced convection inside each hole. Despite many efforts reported in literature to characterize the cooling performance of these devices, detailed analyses of the mixing process between coolant and hot gas are difficult to perform, especially when superposition and density ratio effects as well
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50

Ogawa, Hideyuki, Kazuma Mori, Tomoki Ishikawa, Yoshimitsu Kobashi, and Gen Shibata. "Improvement of diesel combustion with suppression of mutual fuel spray flame interactions with staggered nozzle hole arrangement and a spatially divided combustion chamber." International Journal of Engine Research, August 18, 2023. http://dx.doi.org/10.1177/14680874231191563.

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A combination of a fuel injector with staggered nozzle hole arrangement with a combustion chamber divided into upper and lower layers by placing a lip at the middle of the side wall is proposed to improve diesel combustion with suppression of interactions among fuel spray flames. The fuel injector has twelve alternately arranged spray holes ( ϕ0.09 mm), staggered at two injection angles, 79° and 55° from the central axis of the injector. Two ordinary injectors with eight ( ϕ0.113 mm) and twelve ( ϕ0.092 mm) holes with an injection angle of 78° from the central axis with a conventional re-entra
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