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Study on penetration characteristics of high-speed ...

Oct 01, 2019 · 1. Introduction. The penetration of projectiles into rock or soil medium has been a subject of research for many years, and a large number of empirical and engineering models , , , , have been proposed. Among the many proposed analysis models, the local interaction model , and the cavity expansion model , are widely applied in penetration problems. Both model provide good prediction of …

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High-speed cavity preparation techniques with different ...

The high-speed cavity preparation was performed with a high-speed handpiece (SUPERtorque 625, KaVo, Joinville, Brazil) with a mediumcoarse-grit diamond rotary …

Experimental study on cavity dynamics in high Froude ...

Sep 01, 2020 · Wang et al. simulated cavity development process of flat-nose projectile entering water at high speed (V<150 m/s) by Fluent. As a result, cavitation will occur at the shoulder of the projectile for water entry with high speed, but phase change can be ignored when the speed is less than 50 m/s.

Author: Zhipeng Li, Longquan Sun, Xiongliang Yao, Duliang Wang, Fochen Li

(PDF) Active region design for high-speed 850-nm VCSELs

This paper is going to review the state-of-the-art of the high-speed 850/940-nm vertical cavity surface emitting laser (VCSEL), discussing the structural design, mode control and the related data ...

High-Power Short-Cavity AlGaInP Laser Diodes

cavity (L = 300 µm) ridge-waveguide laser, which demon-strates a high output power of 100 mW/mm in continuous wave (CW) operation at the temperature range from 25°C to 80°C. This output power is far higher than 64 mW/mm by a high-power laser (L = 2200 µm) designed for high-speed recordable DVD systems. 2. Mass Production Process of AlGaInP LD

High power and widely tunable Si hybrid external-cavity ...

A highly efficient silicon (Si) hybrid external cavity laser with a wavelength tunable ring reflector is fabricated on a complementary metal-oxide semiconductor (CMOS)-compatible Si-on-insulator (SOI) platform and experimental results with high output power are demonstrated. A III-V semiconductor gain chip is edge-coupled into a SOI cavity chip through a SiNx spot size converter and Si grating ...

Anomalous lasing of high-speed 850 nm InGaAlAs oxide ...

Aug 11, 2014 · The impact of a large negative quantum well gain-to-cavity etalon wavelength detuning on the static and dynamic characteristics of 850 nm InGaAlAs high-speed oxide-confined vertical-cavity surface-emitting lasers (VCSELs) was investigated. Three distinct lasing regimes were revealed in large square aperture (≥7 μm per side) devices with large detuning including: (1) an anomalous lasing via ...

Fully Automatic High Speed 2 Cavity 2000ml Plastic Pet ...

Fully Automatic High Speed 2 Cavity 2000ml Plastic Pet Water Bottle Blowing Molding Machine Prices , Find Complete Details about Fully Automatic High Speed 2 Cavity 2000ml Plastic Pet Water Bottle Blowing Molding Machine Prices,Bottle Blowing Machine High Speed,Automatic Bottle Blowing Machine Prices,Bottle Blowing Molding Machine from Stretch Blow Moulding Machines Supplier or …

CGOLDENWALL 300g High-Speed Electric …

👍【Superfineand High Speed Powder Grinder】Stainless Steel triples blade: grinding blade, rotary blade, and powder removal blade, which can reach 28000rpm super high grinding speed and grind dried materials into fine power (70-300 mesh) no more than a minute. ... (70-300 mesh) no more than a minute. 👍【Widely Applied to Dry Materials ...

Cavity Expansion Methods in Geomechanics - Hai-Sui Yu ...

Sep 30, 2000 · Cavity expansion theory is a simple theory that has found many applications in geotechnical engineering. In particular, it has been used widely to analyse problems relating to deep foundations, in-situ testing, underground excavation and tunnelling, and wellbore instability. Although much research has been carried out in this field, all the major findings are reported in the form of …

A New Strategy of Cavity Cutting Trajectory Generation in ...

Mar 07, 2016 · High speed machining is widely used in manufacturing. For its high cutting speed, high feeding rate, and high machining accuracy, its requirements for cutting trajectory in high speed machining are so strict that only continuous and smooth trajectories with even cutting loads can lead to high machining efficiency and accuracy.

Progress on High-Speed 980 nm VCSELs for Short-Reach ...

Abstract

Detached Eddy Investigation of Conical Cavity Flow at …

A cavity is a type of widely applied structure that can be found in the aerospace industry in applications such as weapon bays, landing gear wells, section juncture gaps, pressure vents, and internally installed cavity flame holders in high-speed propulsion systems (Lawson, 2011). Generally, cavities can be divided into three major

High-speed wavelength switching of tunable MEMS vertical ...

Mar 02, 2018 · Moreover, high-speed wavelength switching of less than 10 µs is required. In addition, WDM could be a possible solution to meet requirements in future datacenter networks in terms of data traffic capability, cost, and power consumption. For this purpose, low-cost tunable light sources are necessary. There are several widely tunable lasers.

High-speed wavelength switching of tunable MEMS …

High-speed wavelength switching of tunable MEMS vertical cavity surface emitting laser by ringing suppression Shunya Inoue 1*, Shun Nishimura , Masanori Nakahama , Akihiro Matsutani2, Takahiro Sakaguchi1, and Fumio Koyama1,3 1Photonics Integration System Research Center, Laboratory for Future Interdisciplinary Research of Science and Technology, Tokyo Institute of Technology, …

SEM Evaluation of the Hybrid Layer After Cavity ...

This study compared the thickness of the hybrid layer formed using Scotchbond Multi-Purpose Plus, Single Bond 2, Prime & Bond 2.1 and Xeno III on a dentin surface prepared with a diamond bur in a high speed handpiece or prepared with an Er:YAG laser used with two parameters of pulse energy (200 and 400 mJ) and two parameters of frequency (4 and 6 Hz).

Resonant Cavity Enhanced p-i-n Photodiodes Quantum ...

17 GHz have been reported [6]. Recently, we have fabricated RCE type Schottky photodiodes with 50% quantum efficiency, and a 50 GHz frequency perfonnance[7-8]. In tllis paper, we report our work on design, fabrication, and testing of widely tunable high-speed RCE p-i …

OSA | High-speed dual-view photoacoustic imaging pen

The imaging area is a 2.4 mm diameter circular area. In addition, it can provide a high-speed imaging mode of four frames per second and a high-resolution imaging mode of 0.25 frames per second to meet the different needs of clinical users. In this Letter, the performance of the PAI pen was tested by imaging the phantom and the human oral cavity.

Charlie Mack Principal Engineer IRC 2950 E Lindrick Drive ...

The disposable high-speed air turbine dental handpiece is an instrument widely applied in oral therapy. It is composed of interrelated parts, working as a complete set. The disposable high-speed air turbine dental handpiece is an air-driven handpiece which supplied with water and air through the pipe and the coupling of a dental treatment unit.

Research on Aerodynamic Noise Reduction for High-Speed …

Abstract

The effect of magnification on the iatrogenic damage to ...

Objectives: To determine the amount of damage to adjacent surfaces during cavity preparation of approximal box-cavities by using either no magnification or an individually adapted surgical telescope. Materials and methods: Nine dentists prepared in a mannequin head 4 approximal (class II) box-cavities without magnification using a high speed handpiece with lighting from a dental unit.

Double Magic Coincidence in an Optomechanical Laser Cavity

Jan 14, 2013 · Figure 1: (a) Schematic of the optomechanical coupling in a VCSEL: the cavity-enhanced radiation pressure induces the oscillation of the moveable mirror. (b) The VCSEL cavity is composed of AlGaAs / AlAs distributed Bragg reflectors (dark/light blue regions) and a GaAs spacer layer (transparent zone). Blue and red modes represent the optical and acoustic confined modes, respectively.

Bonding Efficacy of a New Self-Adhesive Restorative …

Apply Dentin Conditioner (GC; 20% polyacrylic acid, 3% aluminum chloride, distilled water) for 20 s, rinse thoroughly with water and dry gently 2. Upon successive application in layers of max. 1.8-mm thickness (3 layers), light cure each layer for 20 s with an output of 1200 mW/cm2.

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM …

Abstract—Ultra-compact, widely-tunable and low-power ... UNABLE lasers and high-speed photodiodes in coherent photonic integrated circuit (PIC) receivers have always ... The effective mirror reflectivity for cavity-2 due to cavity-1, when current applied to cavity-1 and its phase tuning section is 1 mA.

Cross-infection risks associated with current procedures ...

1. J Clin Microbiol. 1992 Feb;30(2):401-6. Cross-infection risks associated with current procedures for using high-speed dental handpieces. Lewis DL(1), Boe RK. Author information: (1)Faculty of Ecology, University of Georgia, Athens 30602. Comment in J Clin Microbiol. 1992 …

China Two Cavity Counter Pressure Subframe Mould ...

In Recent years,aluminum subframe is widely applied in automotive.Superband develop few styles of subframe mold successfully. We provide one stop service from casting simulation, Mold design&manufacturing to Mold trial. The subframe is a very important part of the chassis of a family car.

Aspects of the Application of Cavity Enhanced Spectroscopy ...

The high sensitivity of the sensor is obtained by matching wavelengths of the QC lasers radiation to the selected absorption lines of the tested gases: 5.27 μm (for NO) and 4.53 μm (for N 2 O). The optical cavity was built with two high reflective mirrors (R > 0.995) located with the distance of about 60 cm. The leakage radiation from the ...

T ogie Cavity Configurations on the Flow and Near Wake ...

forces of high-speed trains at 0° and 15° yaw angles. They also showed the underneath configurations cause the change of flow structures underneath the train head and in the wake. Zhang et al. (2018a) investigated 4 bogie cavity's angles on the aerodynamic drag force of the high-speed train.

Automatic Glass... - FA Printing Machine Manufacturer Limited

4. screw adjust the suppression mechanism, high accuracy 5. synchronization chain mechanism, to ensure smooth and precise calibration 6. transparent sticker labeling without foam,adhesive sticker labeling without wrinkle 7. widely used and mutil-function with high flexibility 8.Spurts the code system or bar code printer is for optional .

High-efficiency, high-speed VCSELs with deep …

The highly -doped n-contact layer is placed 4 period s away from the cavity to lower the optical loss as well as to reduce the effective c avity length for high speed consideration . The active region h as three InGa As/GaAs quantum wells embedded in a Al 0.3 Ga …

Monolithically, widely tunable quantum cascade lasers ...

Jun 08, 2016 · The photoconductive detector is biased with 30 mA of DC current though a bias tee and the output is connected to a high-speed lock-in amplifier (Stanford Research Systems SR488).

A New Strategy of Cavity Cutting Trajectory Generation in ...

Mar 07, 2016 · High speed machining is widely used in manufacturing. For its high cutting speed, high feeding rate, and high machining accuracy, its requirements for cutting trajectory in high speed machining are so strict that only continuous and smooth trajectories with even cutting loads can lead to high machining efficiency and accuracy.

Experimental Investigation of Oscillations in Flows Over ...

May 17, 2012 · Review of numerical simulations for high-speed, turbulent cavity flows. Progress in Aerospace Sciences, Vol. 47, No. 3. Experimental Studies of Open Cavity Configurations at Transonic Speeds with Flow Control. ... Time-resolved PIV applied to cavity unsteady flows.

Photonic generation of polarization-resolved wideband ...

Optical chaos generated by chaotic lasers has been widely used in several important applications, such as chaos-based communications and high-speed random-number generators. However, these applications are susceptible to degradation by the presence of time-delay (TD) signature identified from the chaotic output. Here we propose to achieve the concealment of TD signature, along with the ...

(PDF) Analog and digital functionalities of composite ...

I. INTRODUCTIONT HE vertical-cavity surface-emitting laser (VCSEL) has been widely used in short to midhaul data communication networks, due to its low-cost manufacture, low-power operation, high-speed modulation, and its ability for 2-D array integration [1].

Explosives with Lined Cavities: Journal of Applied Physics ...

Apr 28, 2004 · The process is separated into two phases: first, the formation of part of the metal liner into a long thin jet traveling longitudinally at very high velocities (30,000 ft./sec.) and, second, the forcing aside of the target material by the extremely high pressures (0.3‐million atmos.) produced by the impact of the high speed jet.

Factory Supply Concrete Hollow Blocks Wall Plastic Molds ...

Mould cavity: Single/Multi: Size&Shape: ... the high-speed railway construction in China with "Huafeng" plastic mould of first-class quality,the products have widely applied in many key national projucts ,the products are widely accepted and actively peaised by the constructoes of the railway projucts,It has approved in the strict acceptance by ...

Investigations of autoignition and propagation of ...

widely used for aerodynamically stabilizing the flames in supersonic flows [6–8]. Both strut and cavity have been found to be effective de-vices to generate RZ for flame stabilization in combustors, as seen from the extensive experimental [9–11] and numerical [12–14] studies.

World’s fastest directly modulated laser exceeding 100-GHz ...

Oct 20, 2020 · Directly modulated lasers are now widely used in data centers*5, ... Figure 2 shows the change in the 3-dB bandwidth when photon-photon resonance is applied. ... since the injected carriers are also tightly confined in the active layer, low power consumption and high-speed modulation of direct modulation lasers can be expected.

The New Isuzu 2.5 Liter and 2.8 Liter 4-Cylinder Direct ...

the swept volume and increase the speed of DI diesel engines. Our small, high-speed '^"-Series engines with direct injection were designed in 1969 in a 4-cylinder version (3.6L.) and a 6-cylinder version (5. 4L.). More recently, mass production of the small, high-speed, 4-cylinder "Bf,-Series engine (3.3L.) with direct injection began in 1980.

Carbide Rod, Tungsten Carbide Rods - Meetyou Carbide

In addition, it is also widely used in the processing of high-speed steel tools, carbide milling cutters, carbide tools, carbide drills, high-speed steel, carbide tools, etc. Carbide rods can be used not only for cutting and drilling tools but also for input needles, various roll wore parts and structural materials.

Supersonic Cavity Flows and Their Control | AIAA Journal

May 02, 2012 · Suppression of the cavity oscillation using high-speed mass injection 30 May 2020 | International Journal of Modern Physics B, Vol. 34, No. 14n16 Onset of Cavity Oscillation From Transverse to Longitudinal Mode in a Supersonic Flow

Sonochemistry: The Suslick Research Group

The cavity is spherical at first, but as it collapses the jet develops opposite the solid surface and moves towards it. (L.A. Crum) Figure 6. High-speed microcimemagraphic sequence of laser-induced cavitation near a solid surface shows the formation of a microjet impact with a velocity of approximately 400 kilometers (250 miles) per hour. (W.

Preliminary Study of Supersonic Partially Covered Cavity ...

Jul 01, 2017 · Abstract. We investigate supersonic flow over rectangular cavities of 3 different length-to-depth ratio ( L/D) – 3, 4.5, and 6. Half of the length of the cavities will be covered additional lids of D/d = 6, in which D/d is the ratio of cavity depth to lid thickness. The lids were installed to either leading edge (FP), trailing edge (BP), or both edges (CP) of the cavities, resulting in 12 variety of cavity …

Quantum Cascade Laser Research Papers

Our recently developed miniaturized external-cavity QCLs are widely tunable over a spectral range of >250 cm-1 and tuning can be accomplished at rates of >25 cm-1 per millisecond. This enables high-speed mid-infrared spectroscopy of gases and surface contaminants for a variety of military and commercial applications.

High-Speed Oven - ElectroluxAppliances

Roast and Speed Grill using high-speed oven technology for superior results. Wave-Touch® Controls Sleek control panel illuminates with just a touch and fades away after an option is selected. Versatile Cooking Settings With 84 basic cook settings, 100 preprogrammed and modifiable recipes and 17 microwave options, this high-speed oven is almost ...

Vertical-cavity surface-emitting lasers with ...

Optical interconnects (OIs) are the only solution to fulfil both the requirements on large bandwidth and minimum power consumption of data centers and high-performance computers (HPCs). Vertical-cavity surface-emitting lasers (VCSELs) are the ideal light sources for OIs and have been widely deployed. This paper will summarize the progress made on modulation speed, energy efficiency, and ...

Optical Peaking Enhancement in High-Speed Ring …

Sep 11, 2014 · After servicing ultra-high-speed links over distances down to a few meters, optical technologies may be applied to even smaller architectural …

A new methodology for studying dynamics of aerosol ...

A new methodology for studying dynamics of aerosol particles in sneeze and cough using a digital high-vision, high-speed video system and vector analyses PLoS One . 2013 Nov 27;8(11):e80244. doi: 10.1371/journal.pone.0080244.

Chapter 35 intro Flashcards | Quizlet

Which type number of Bur helps to provide angles to the walls of the cavity preparation with retention grooves. 699. The most common types of dental handpieces are ... The term applied to all rotary instruments that have a sharp cutting head with blades is ... The shank is held in the high-speed handpiece by the creation of friction that grips ...

HDMI Cable - 4K High Speed HDMI Color …

4K HDR HDMI Cable 6 Feet, 18Gbps 4K 120Hz, 4K 60Hz(4:4:4, HDR10, ARC, HDCP2.2) 1440p 144Hz, High Speed Ultra HD Cord 26AWG Amazon Basics Nylon-Braided 4K, 18Gbps HDMI to HDMI Cable, 3 Foot AmazonBasics High-Speed HDMI Cable, 6 Feet, 2-Pack

Reviews: 2.4K

Quantum dot semiconductor optical amplifier/silicon ...

The ring filter was measured to have an 8.8 nm free spectral range and 0.8 nm FWHM bandwidth. The cavity length is dominated by the off-the-shelf RSOA length of 3 mm, which could be customized shorter in the future. The current cavity length corresponds to about a 0.1 nm mode spacing, which is on the order of the FWHM of the microring filter.

Unsteady Behavior of Cavitating Waterjet in an ...

cross-section [1]-[5]. Also, there is a highly-intensive impact caused by the collapse of shed clouds [6] and the cloud cavitation is considered to be a self-oscillation phenomenon based on the reentrant motion instability related to an attached cavity length and the adverse pressure gradient at the reattachment zone of separated cavity [7] [8].

Vertical-Cavity Surface-Emitting Lasers (VCSEL) Market ...

Feb 08, 2021 · The industrial heating & laser printing segment held 9% of the vertical-cavity surface-emitting lasers market share in 2020 and is anticipated to grow at a CAGR of 20.6% through 2027.

Ten Tips to Slash Cycles in PET Preform Molding | Plastics ...

Apr 27, 2015 · For example, a 525 g preform with a wall thickness of 8.5 mm (0.335 in.) can be filled at 27 sec, resulting in a fill speed of 19.4 g/sec/cavity. Hold Time : The purpose of hold time is to supply resin that is needed to fill out the voids in preforms as they shrink from a melt density of 1.15 g/cm3 to the solid density of 1.33 g/cm3.

Piab introduces soft gripper range for industrial robots

Jan 20, 2021 · Piab has introduced a soft gripper – or end effector – for industrial robots. The company says its piSoftGrip range is developed for the automation of the food and chocolate industry. Piab once again extends the pi-SoftGrip family with a new pinch gripper developed for the automation of the food/chocolate industry.

China Progressive Cavity Pump, China Progressive Cavity ...

Progressive Cavity Pump for High ... mono screw pump are widely applied in the beverage, food, dairy, pharmaceutical, chemical and process industries , to transport thick liquid material . Product Features: 1) Material: SUS304/ SUS 316L 2) Flow rate: 0.5-60m3/h 3) Max Pressure: 18 bar 4) Speed: 720-1400rpm 5) Power: 0.37kw-15kw 6) Voltage: 220V ...

Analysis of the spectral relationships of cavity tones in ...

The results obtained using this approach applied to detailed and high-quality spectral data of shallow cavity flow over the Mach number range of 0.20–0.65 are ... A widely adopted model of the flow-acoustic coupling ... speed and even reversed flow in the cavity causes a free

Spherical and cylindrical cavity expansion models based ...

May 02, 2017 · The cavity expansion theory is most widely used to predict the depth of penetration of concrete targets. The main purpose of this work is to clarify the differences between the spherical and cylindrical cavity expansion models and their scope of application in predicting the penetration depths of concrete targets. The factors that influence the dynamic cavity expansion process of concrete ...

Experimental Hydrodynamics of Spherical Projectiles ...

cavity would form. The cone angle formed behind an impacting object was also studied. The cone angle was found to be a function of depth and impact speed over the range of impact velocities tested. Steel spheres ranging in diameter from 0.64 cm (¼ in) to 5.08 cm (2 in) were used at impact speeds from 0 to 6.9 m/s. Standard billiard balls of

(PDF) High-speed resonant-cavity-enhanced Schottky ...

High-speed resonant-cavity-enhanced Schottky photodiodes. Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series, Vol.6 (IEEE Cat. No.98CH36178), 1998. Gary Tuttle. Ekmel Ozbay. M. Unlu. Necmi Biyikli. Gary Tuttle. Ekmel Ozbay. M. Unlu. Necmi Biyikli ...

Widely tunable electrically pumped 1050nm MEMS …

In recent years, MEMS-tunable VCSELs have emerged as a leading swept source for optical coherence tomography imaging. At the ophthalmic imaging wavelength of 1050nm, optically pumped MEMS-VCSELs (MEMS-oVCSELs) have previously achieved >100nm tuning range and repetition rates approaching 1Mhz, enabling high-resolution and high-speed eye imaging.

Near THz Gyrotron: Theory, Design, and Applications

When the Center for Applied Electromagnetics was established in 2008, one of the research ... To compensate for the high wall losses in the cavity at such a high frequency, we look for a high order cavity mode. Recent gyrotron experiment for ITER [14] showed that TE ... is the initial orbital velocity normalized to the speed of light, 2 J 0 1 ...

Optical Phased Array Using High-C ontrast Grating All …

demonstrated with high speed beam steering. Highly efficient phase tuning is achieved by micro-electro-mechanical actuation of the HCG to tune the cavity length of the APFs. Using APF phase-shifters allows a large phase shift with an actuation range of only tens of nanometers. The ultrathin HCG further ensures a high tuning speed (0.626 MHz). Both

PEH:Progressing Cavity Pumping Systems - PetroWiki

Apr 26, 2017 · Introduction Progressing cavity pumping (PCP) systems derive their name from the unique, positive displacement pump that evolved from the helical gear pump concept first developed by Rene Moineau in the late 1920s. Although these pumps are now most commonly referred to as progressing cavity (PC) pumps, they also are called screw pumps or Moineau pumps.

Terahertz Sensor Using Photonic Crystal Cavity and ...

May 26, 2017 · In this paper, we report on a terahertz (THz) sensing system. Compared to previously reported systems, it has increased system sensitivity and reduced size. Both are achieved by using a photonic crystal (PC) cavity as a resonator and compact resonant tunneling diodes (RTDs) as signal source and as detector. The measured quality factor of the PC cavity is higher than 10,000, and its …

Publications - Yale School of Engineering & Applied Science

C. Schuck, W. Pernice, H. Tang, “Matrix of integrated superconducting single photon detectors with high timing resolution”, IEEE Trans on Applied Superconductivity (invited article) 3, 2201007(2013)

High-Temperature Insensitivity of 50-Gb/s 16-QAM …

PENG et al.: HIGH-TEMPERATURE INSENSITIVITY OF 50-Gb/s 16-QAM-DMT TRANSMISSION BY USING TEMPERATURE-COMPENSATED 3333 TABLE I BIT-RATE RECORDS OF 850-NM VCSELSATHIGH TEMPERATURE derived as follows [16]: BER = 1 2 erfc Q √ 2,Q= (Pi −Pj)2σ, (1) where Q is the quality factor that is proportional to the optical power P;Pi represents the power at level “one” …

High‐Energy and Short‐Pulse Generation from Passively …

High pulse intensities are widely used for permanent transparent material modification. In addition, these extremely high power densities of the pulses resulting in a highly localized disruption of the material matrix with very little energy deposited and few heat transferred to the surrounding material. This is a so‐called laser cold process.

MAX40025A/MAX40025C/MAX40026 - 280ps High …

is compatible with the output swings of several widely used high-speed trans-impedance amplifiers, such as the MAX40658. The output stage is LVDS (Low-Voltage Differential Sig-naling), which helps to minimize power dissipation and in-terfaces directly with many FPGAs and CPUs. Comple-mentary outputs help in suppression of common-mode

J. Fluid Mech. (2017), . 826, pp. doi:10.1017/jfm.2017.416 ...

Although flow control has been applied in some high-speed flows (Cattafesta et al. 2008; Cattafesta & Sheplak2011), both effective and efficient control of transonic and supersonic cavity flows remains challenging due to a lack of actuator control authority at these flow conditions. Due to the large energy input required for high-speed cavity

A Nanomembrane-Based Wavelength-Tunable High-Speed …

Triggered single photons are generated via injection of ultrashort electrical pulses into the diode, while their energy can be precisely tuned over a broad range by varying the voltage applied to the piezoelectric crystal. High speed operation of this single-photon-emitting diode up to 0.8 GHz is demonstrated.

Office of Medical History

High-speed motion pictures of the exterior of a thigh, such as those of figure 76, show the temporary swelling, indicative of the internal formation of this cavity. The temporary cavity in the thigh of a cat, formed by the passage of a 4 /32-inch steel sphere with an impact velocity of …

Analysis of the Tunable Asymmetric Fiber F-P Cavity …

Fiber optical sensors have been applied in various measurements because of their inherent advantages [1–3]. Fiber Bragg grating (FBG) sensors are the sensors in common use, which possess the high sensitivity, compact size, and survivability in harsh environments. FBG sensors have been widely used in fields such as temperature,

High-speed harvesting of random numbers | Science

Feb 26, 2021 · The high-speed camera could only capture data over a limited time (∼2 ns), so they had to collect and concatenate multiple records to generate the more than 10 9 random numbers needed for the various statistical tests of randomness. Replacing the camera with a multitude of integrated photodetectors is yet to be achieved.

US20040008933A1 - High-speed transmission system ...

This invention generally relates to an optical filter for a fiber optic communication system. A coupled multi-cavity optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated signal. The optical filter may compensate for the dispersion in the fiber optic transmission medium and may also ...

Low spatial coherence electrically pumped semiconductor ...

The extreme case, of course, is the circular cavity, for which the high-Q WGMs are all highly peaked close to the cavity boundary, and the fourth lasing mode turns on at 9.5 times the first threshold pump, whereas the D-shaped cavity laser with r 0 = 0.5R has a fourth mode threshold only 2% higher than the first threshold. Note that the ...

Phys. Rev. Lett. 104, 024501 (2010) - Supersonic Air Flow ...

Jan 11, 2010 · Using visualization experiments with smoke particles and multiscale simulations, we show that in addition, a high-speed air jet is pushed out of the cavity. Despite an impact velocity of only 1 m / s , this air jet attains supersonic speeds already when the cavity is slightly larger than 1 mm in diameter.

CMOS-compatible 3-D ferroelectric memory with ultralow ...

Jan 19, 2021 · As we enter the era of superintelligence and hyper-connected Fourth Industrial Revolution, the importance of high-density and high-performance memory is greater than ever. Currently, the most widely used NAND flash memory has issues of high power consumption, slow operation speed, and vulnerability to repetitive use since it relies on the charge trap effect to store …

US7369583B2 - Electrooptically wavelength-tunable resonant ...

A device contains at least one wavelength-tunable element controlled by an applied voltage and at least two resonant cavities, where the resonant wavelength of the tunable element is preferably elecrooptically tuned using the quantum confined Stark effect around the resonant wavelength of the other cavity or cavities, resulting in a modulated transmittance of the system.

Mid-infrared cavity ring-down spectroscopy using DFB ...

Continuous-wave cavity ringdown spectroscopy2) (CW-CRDS) using MIR lasers is gaining greater attention as a novel technique to analyze a variety of gas molecules or isotopolo-gues with high sensitivity.3–6) Among them, radiocarbon (14C) detection by CRDS proposed by …

Oxide-confined leaky vertical-cavity surface-emitting ...

Vertical-cavity surface-emitting lasers (VCSELs) that operate at 850nm and are based on oxide-confined apertures are widely used in optical interconnects in data centers, supercomputers, wireless backbone networks, and consumer applications. 1 As the processor productivity in these applications increases, it is necessary to continuously improve performance and scale transmission speeds ...

Aerospace Science and Technology

methods applied to blade tip such cavity squealer, winglet and carved designs are widely investigated order to minimize effects of the flow and secondary Heyes etal. [3]experimentally the aerodynamic of partial squealer tips a linear turbine cascade and ... tries in a linear turbine cascade at low & high-speed …

Microwave Cavity Resonator Emissions in Your PCB Layout ...

Oct 29, 2020 · However, there are some effects that occur due to resonance at microwave frequencies in digital and analog systems. High frequency cavity resonances are just one of many causes of analog signal integrity and power integrity problems at high frequencies, but digital signals with broad bandwidth also create the same effects.

High-frequency cavity optomechanics using bulk acoustic ...

INTRODUCTION. The coherent control of mechanical objects (1–4) can enable applications ranging from sensitive metrology to quantum information processing (6, 7).An array of devices (8–14) ranging from nano-optomechanical crystals to suspended micromirrors have been used to manipulate mechanical degrees of freedom using light.Central to the field of cavity optomechanics—and more generally ...

‪Seunggeun Lee‬ - ‪Google Scholar‬

GaN-based vertical-cavity surface-emitting lasers with tunnel junction contacts grown by metal-organic chemical vapor deposition ... Applied Physics Express 11 (6), 062703, 2018. 40: 2018: Continuous-wave operation of m-plane GaN-based vertical-cavity surface-emitting lasers with a tunnel junction ... High speed performance of III-nitride laser ...

OSA | Fringe projection profilometry by conducting deep ...

High-accuracy and high-speed three-dimensional (3D) fringe projection profilometry (FPP) has been widely applied in many fields. Recently, researchers discovered that deep learning can significantly improve fringe analysis. However, deep learning requires numerous objects to be scanned for training data. In this paper, we propose to build the digital twin of an FPP system and perform virtual ...

and - openssl

The default digest algorithm for the MAC computation was changed to SHA-256. The pkcs12 application now supports -legacy option that restores the previous default algorithms to support interoperability with legacy systems. *Tomáš Mráz and Sahana Prasad* * The openssl speed command does not use low-level API calls anymore.

hackman and oldham advantages and disadvantages

Despite many perceived disadvantages, centralization may lead to more efficient operations, particularly if the company is operating in a stable environment [1] Figure 13.1. According to Coelho and … Variety . The middle disc rotates around its centre at the same speed as the input and output shafts. Loading... Save for later. The Job Characteristics Theory (JCT), developed by Hackman and ...

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