본문 바로가기

Technology/Tech

File Explorer Opens And Closes Immediately In Windows 10 Due To Quick Access File Explorer Opens And Closes Immediately In Windows 10 Due To Quick Access If you are having issues where File Explorer Opens and then immediately closes in Windows 10 it may be due to a problem with Quick Access.SymptomsYou open file explorer from the task bar or start menu in Windows 10. File Explorer opens and immediately closes. Right clicking on the file explorer icon in the task bar and .. 더보기
1C charging rate Charge and discharge rates of a battery are governed by C-rates. The capacity of a battery is commonly rated at 1C, meaning that a fully charged battery rated at 1Ah should provide 1A for one hour. The same battery discharging at 0.5C should provide 500mA for two hours, and at 2C it delivers 2A for 30 minutes.Mar 9, 2017 C-rateTime Table 1: C-rate and service times when charging and discharging .. 더보기
How to choose the best power supply 1. How to choose the best power supplyhttps://www.pcworld.com/article/2025425/how-to-pick-the-best-pc-power-supply.html 2. 15-amp duplex receptacles with 120 V circuit in NA homeshttps://www.homedepot.com/c/electrical_outlets_factors_to_consider_when_selecting_electrical_outlets_HT_BG_EL 더보기
Selecting a fan (CFM) Step 1. decide air speed required (desirable air speed to be decided by thermal design and verified by simulation/test): ie 2.17 m/s Step 2. locate vent size (assume fully open vent): ie 50 x 50 mm2 = 0.0025 m2 Step 3. calculate required CFM(cubic feet per min): ie 2.17 m/s * (50 x 50 mm2) = 0.005425 m3/s = 0.3255 m3/min = 11.50 ft3/min, CFM *reference https://www.eetimes.com/document.asp?doc_id.. 더보기
Getting error "seller requires payment through website Re: Getting error "seller requires payment through website"Here's an update, found something back in the archives that's worth trying: Login to your PayPal AccountClick on "Profile"Click on "My Selling Tools"Under "Getting paid and managing my risk"Look for "Block Payments"Click on "Update"Next on the "Payment Receiving Preferences" pageScroll to the bottom of the pageLook for "Block payments fr.. 더보기
Understanding Aperture – A Beginner’s Guide Understanding Aperture – A Beginner’s GuideLAST UPDATED ON SEPTEMBER 4, 2017 BY NASIM MANSUROV 383 COMMENTS« 1. Understanding Aperture2. Reader Comments »Aperture is one of the three pillars of photography, the other two being ISO and Shutter Speed. Without a doubt, it is the most talked about subject, because aperture either adds a dimension to a photograph by blurring the background, or magica.. 더보기
Carbon fiber composite Carbon fiber composites currently offer the best weight, stiffness, durability and ease of use parameters out of all other materials available for bicycle component manufacture. Composite literally means made of several materials - in this case carbon fibers, and resin.Carbon fiber layup and the quality of manufacture is extremely important in being able to control the torsional loads. Unlike is.. 더보기
Transmissibility of Vib 보호되어 있는 글입니다. 더보기
Failure Analysis 보호되어 있는 글입니다. 더보기
Texture Definition 보호되어 있는 글입니다. 더보기
Fuel Cells vs Electric Batteries 1. A Basic Overview of Fuel Cellhttp://americanhistory.si.edu/fuelcells/basics.htm 2. Comparison between fuel cells vs electric batterieshttps://protonex.com/wp-content/uploads/2017/02/Protonex_UAV_Presenation_20170126_FINAL.pdf 3. DOE 's technical target (and current status) of energy efficiencyhttps://energy.gov/eere/fuelcells/doe-technical-targets-fuel-cell-systems-portable-power-and-auxiliar.. 더보기
Improper balance of a helicopter’s load 1. Improper balance of a helicopter’s load can result in serious control problems. In addition to making a helicopter difficult to control, an out-of-balance loading condition also decreases maneuverability since cyclic control is less effective in the direction opposite to the CG location.- What is the cyclic control?https://en.wikipedia.org/wiki/Helicopter_flight_controlsThe control is called .. 더보기
Light weight metals 보호되어 있는 글입니다. 더보기
Introduction to the Physics of Energy PH240 - Stanford University - Fall 2012 http://large.stanford.edu/courses/2012/ph240/ Introduction to the Physics of EnergyPH240 - Stanford University - Fall 2012 R. B. LaughlinReportsFarzanehAfshinmaneshNanophotonics Pave the Way for Solar CellsPlasmonic Solar CellsShivAgarwalModeling Transmission LinesElectronic CoolingHadisehAlaeianLanthanide Doped Up-Converters for Photovoltaic ApplicationsBi-Molecular Up-ConvertersHamzaAljamaanTh.. 더보기
Infrared Camera 보호되어 있는 글입니다. 더보기
엘지 라우터 설정 보호되어 있는 글입니다. 더보기
Understanding FFT and windowing 보호되어 있는 글입니다. 더보기
Getting started with airplane engineering 보호되어 있는 글입니다. 더보기
RF shielding enclosures design 보호되어 있는 글입니다. 더보기
Plastic part design guideline Design Guide Line 1. Ribs height and thickness 1-1. Heigh of Boss, H = 2.5DBoss diameter, wall thickness, and height design parameters. While boss heights vary by design, the following guidelines will help avoid surface imperfections like sink marks and voids: the height of the boss should be no more than 2 1/2 times the diameter of the hole in the boss. 1-2. Rib-to-wall thickness ratios, 60% Th.. 더보기
Solar Power Solar Power http://www.globalization101.org/solar-power/ Along with wind power, solar power has experienced a boom since 2002: existing global capacity more than doubled in the past four years. In general, the problems with solar power are less pronounced than those with biofuels, wind power, and hydrogen power. Energy from the sun’s rays can be manipulated in many ways in order to perform a var.. 더보기
Photovoltaic Glass Stands Up to 'Wall of Wind' Photovoltaic Glass Stands Up to 'Wall of Wind' July 2010 Set-up of the module testing at Florida International University’s Wall of Wind facility. Using an elevated ramp to maximize wind stress, six 500-horsepower driven fans generated top wind speeds of 115 mph (185 kph). Corning technician Shaun Congdon prepares for data collection prior to testing. Multiple sensors fed data to the team’s comp.. 더보기
Corning Cable Systems Outdoor Cable Jacket Material – Medium Density Polyethylene In the selection of a material for an outdoor cable jacket, a manufacturer must choose a material that optimizes critical performance characteristics. The characteristics considered crucial for an optical fiber cable jacket are: ruggedness, tensile strength, heat and chemical resistance, flexibility, stress crack resistance, shrinkage, toughness, and long term environmental stability. For rugged.. 더보기
Outdoor Cabled Optical Fiber Lifetime Reliability Outdoor Cabled Optical Fiber Lifetime Reliability AEN 92, Revision: 1 This Applications Engineering Note (AE Note) addresses the reliability of optical fibers in outside plant cables comprising a black, medium density polyethylene (MDPE) jacket. It addresses both fiber reliability and cable component (materials) reliability. Many factors also affect cable reliability and this AE Note addresses t.. 더보기
광섬유(Glass fiber) 구조 입사각이 임계각 보다 클 경우에만 반사가 발생한다. 단, 여기서 우리가 간과 하지 말아야 될 것이 있다. 바로 서로 다른 두 매질의 굴절률(Refraction) 이다. 즉, 매질 A로부터 입사되어 굴절되거나 반사되는 매질 B의 굴절률이 상대적으로 더 낮다는 사실이다. 만약 이러한 두 매질의 굴절률에 대한 약속을 위반하게 되면 어떤 현상이 일어날까? 그림 3.1은 광섬유(Fiber)의 표면 오염으로 인한 굴절률 변화로 빛이 산란하는 모습을 보여주고 있다. 공기는 자유공간이므로 굴절률 1에 해당한다. 그러나 그림과 같이 광섬유 표면의 오염으로 1 이상의 값으로 굴절률이 변화하게 된 것이다. 즉, 약속 위반이 발생한 것이다. 광섬유(Fiber)는 매우 투명한 물질의 순수한 유리이다. 이것의 표면은 사람의 손이.. 더보기