LEEVENSPARK

Each bearing type has its own limiting speed. The theoretical speed that bearings can run at safely, even if heat generation by internal friction occurs, is called the maximum permissible speed. The permissible speed is related to bearing type, type of cage, lubricant type, load and cooling conditions to which the bearing is subjected  For contact rubber seals(2RS type), the permissible speeds are limited by the peripheral velocity of the seal lip.  Normally, this is approximately 50 - 60% of that of non-contact rubber seals. If light contact rubber seals are required, this must be stipulated with the order. If high loads occur, the permissible speed values must be reduced and the following supplementary factors applied, except under standard operating conditions(Cr/P<12, Fa/Fr>0.2 )  COMPENSATION FOR MAXIMUM PERMISSIBLE SPEED DEPENDENT ON LOAD RATIO   Cr/P 5 6 7 8 9 10 11 12 COMPENSATION FACTOR 0.72 0.79 0.85 0.90 0.93 0.96 0.98 1.00 COMPENSATION FOR MAXIMU

Launched alongside The Museum of Modern Art “Design and The Elastic Mind” exhibition, the Morph concept device is a bridge between highly advanced technologies and their potential benefits to end-users. This device concept showcases some revolutionary leaps being explored by Nokia Research Center (NRC) in collaboration with the Cambridge Nanoscience Centre (United Kingdom) – nanoscale technologies that will potentially create a world of radically different devices that open up an entirely new spectrum of possibilities. Morph concept technologies might create fantastic opportunities for mobile devices: ·    Newly-enabled flexible and transparent materials blend more seamlessly with the way we live ·    Devices become self-cleaning and self-preserving ·    Transparent electronics offering an entirely new aesthetic dimension ·    Built-in solar absorption might charge a device, whilst batteries become smaller, longer lasting and faster to charge ·    Integrated sensors might allow us t

LAPTOP PROTECTOR CIRCUIT Protect your valuable laptop against theft using this miniature alarm generator. Fixed inside the laptop case, it will sound a loud alarm when someone tries to take the laptop. This highly sensitive circuit uses a homemade tilt switch to activate the alarm through tilting of the laptop case. The circuit uses readily available components and can be assembled on a small piece of Vero board or a general- purpose PCB. It is powered by a 12V miniature battery used in remote control devices. IC TLO71 (IC1) is used as a voltage comparator with a potential divider comprising R2 and R3 providing half supply voltage at the non-inverting input (pin 3) of IC1. The inverting input receives a higher volt-age through a water-activated tilt switch only when the probes in the tilt switch make contact with water.When the tilt switch is kept in the horizontal position, the inverting input of IC1 gets a higher voltage than its noninverting input and the output remains low. IC CD4

Work Safe with Computer Are you spending a lot of time sitting at the computer, doing school work or playing games? Working with a computer for long hours can affect different parts of the body, like our hands, wrists, back, and eyes. If you want to keep these parts as healthy as possible then you have to take some precautions. Sitting Square in Your Chair: One of the most important things you should do at the computer is sitting in your chair. This means keeping your body straight when you’re sitting with your behind in the center of the seat. Your legs should come out straight with your knees and your feet don’t reach the floor, use a footrest. Your back should be touching the seat back the keyboard while you type. And if you can use a seat that has a support for your lower back, that’s even better. Typing time: And speaking of typing: you don’t need to hit those keys very hard to type. A light touch will do the job. While you’re typing, make sure your fingers don’t have to

Why does the reception of transistor become clear when the antenna is touched? Radio frequency region of electromagnetic spectrum spreads from few kilohertz [KHz] to few thousand megahertz [MHz]. The geometry of human body allows the limbs, head and torso to act as three dimensional antenna factor. It amplifies the signal as high as five times the signal one may receive with other type of antennae like monopole, dipole and the like. We can see this effect in any radio frequency receiving instrument, such as, oscilloscope in any electronic lab or more commonly a transistor radio. If one grabs the tip of the antenna or touches the body of any transistor, the signal received multiples several-fold and the reception improves. circuit diagram of a high performance bias circuit of a radio

Apple Magic Trackpad first hands-on So it's real, and... it's a trackpad. What seemed like it might have been pure rumor and some good Photoshopping just a short while ago has magically (ha ha!) transformed into reality. If you're wondering what the Magic Trackpad is like to use -- get ready for a shock. It feels just like using a slightly larger version of a MacBook or MacBook Pro pad. And we mean exactly, right down to the multitouch gestures and whole-pad click. Yes, it clicks. There's also a new gesture, if you're keeping track -- a three-finger move that lets you drag windows around (very helpful), though you give up the functionality of being to navigate stuff like iPhoto galleries with a swipe (it's an option you can toggle in preferences -- you have a choice). We're going to be doing some serious testing with the new peripheral, but for now, feast your eyes on the pics below. for more info visit :  http://www.engadget.com/ Magic Trackpad fir