Engineering Hobby Projects

hi actually we are using AT 89C52 mostly for all the engineering hobby projects.why we are specifically using this,we are having various micro controllers can we use those or that itself is enough for that projects....is that means wat are those..plz mention those features that are enough for desig

Time travel is beautiful | Bad Astronomy

With the premier of Series 5 of Doctor Who, you might feel a little confused over time travel in movies and TV shows. Fear not! The wonderful website Information is Beautiful has you covered:

infoisbeautiful_timetravel

Click to see the whole wonderful thing; a timeline of time travel from quite a few scifi stories.

Now what we need is for this to be open-source so we can add in others. But then again, adding in the good Doctor’s travels would mean turning this lovely graphic into a solid red rectangle.


Lighting Up History

A new process known as polynomial texture mapping is helping to illuminate artifacts in a whole new light, and it was developed from video game research. Archaeologists use the lighting method to reveal hidden clues, taking multiple images of an object lit from different angles each time. These imag

Internet Curves Ahead?

Definitely cool technology-wise, voice-controlled Internet access and enhanced driver interface functionality via smartphones will be welcomed by many as the ultimate driver's multitasking tool. The quandary, claim safety experts, is that drivers have a hard enough time keeping their eyes on the roa

Uncle Sam, Nutritionist?

A new survey by FoodMinds finds that Americans want federal government guidance when it comes to regulating nutrition labels. People are becoming more conscious of the food they consume and are looking to the government to provide assistance in monitoring the quality of manufactured foods. But, the

BREAK SHOES

DOES ANY ONE KNOW THE MANUFACTURER OF UKE BRAKE SHOES BRAND?

WHAT I KNOW IS THAT THESE BRAKE SHOES UNDER UKE BRAND ARE CHINESE MADE, BUT I DO NOT KNOW THE MANUFACTURER OF THE SAME. PLEASE HELP.

TR CALCULATION

Sir,

how is to calculate TR. how many TYPE OF HEATS WE ARE CONSIDER ,

please calculate the TR for one room. for following detail,

plz send your calculation method

EXAMPLE,

am consider one room for following description

ROOM SIZE

with =20 feet , b

Xcel Energy Moving Slowly in the Right Direction

Even if it’s partially by force, Xcel Energy is taking a few big steps  into a more realistic  energy future. Unlike some people in government and energy, they are not asking us to adapt to global warming,  but to buy their renewable energy.*    Adaptation to runaway climate change,  or to a 4-6 degree temperature rise is most likely  impossible.

It’s a good thing then that Xcel Energy is moving into a new renewable, cleaner energy future in several states.  In Colorado it’s not completely out of the goodness of their hearts — it’s because Colorado just passed its new clean air and jobs law.   It’s another example of when govenrnment and laws actually work. From Clean Technica:

“Colorado’ s largest utility, Xcel Energy is shutting down 900 MW of coal plants and replacing them with natural gas power plants. This move by just one utility will reduce the entire Colorado coal power fleet by a staggering 30%. What prompted this rather dazzling move?

The Colorado Clean Air – Clean Jobs Act just passed. …  All new (or re-powered) electric power plants may not emit more than 1,100 pounds of carbon dioxide per megawatt-hour, effectively ruling out coal burning (without CCS).”

Carbon capture and storage (CCS) does not yet exist for large commercial coal burning use.  It may never operate as promised and it’s still a big question whether it will ever work adequately or even be remotely affordable.

“All utilities in the state must find a way to achieve the goal. They can replace or re-power coal plants with natural gas or add energy efficiency measures such as combined heat & power, or they can switch to renewable energy sources.  . . . . Natural gas is the easy way out, since the state has the third-largest reserves of natural gas. Although natural gas is a fossil fuel that potentially harms drinking water, its contribution to climate change is only half that of coal.”

Only??  Comparing it to coal isn’t saying much.

Natural gas is a fossil fuel that is finite, like all the others, and it definitely pollutes the air when its processed and burned. Just as bad seems to be the process of hydraulic fracking to get the natural gas out of where it is, often in rock or hard to get at.  This process uses lots of toxic chemicals that are mostly unregulated because the energy companies won’t even reveal exactly what is in their fracking formulas.  Xcel Energy needs to be pushed to use more wind energy which it’s already using to great effect in Minnesota and South Dakota.

XCel Energy is building an enormous new wind farm in southern Minnesota.  I’ve been down there recently twice in the past 5 years and it’s very windy there and even more so in South Dakota.  It’s probably not [...]

SOLUTION to Overcome Health Risks of Mobile Phones

1. I understand that long exposures to high frequencies emanated from Mobile phones are a health risk. Given that we are aware of it - it is not difficult to find a solution.
2. When mobile phone technology was launched it operated at around 450 MHz and now at about 900MHz or both.
3. H

Testing of MCCB

Hello everyone,

We are MCCB manufacturers and we wanna test our MCCBs in some 3rd party lab , So i reffered to Table 10 of IEC-60947-2 that specifies the Number of samples and the test sequences needed to test any MCCB. If anyone experienced with tests ; How correct is this number of samples gi

Coating / Painting

What surface preparation is required for SS pipe material before coating since it required insulation. Need chemical cleaning sweep and blasting or any one.

If site condition don't permit can we go for only chemical cleaning or solvent cleaning ? will there be any issue for profile or adhesion?

Predicting the past from the present factsGene Expression

Matt Yglesias points to an OKCupid survey which shows that in the United States there tends to be a rather coherent block of social & economic conservatives within the Republican party, while the Democrats are a coalition between those who emphasize social issues and those who emphasize economic issues. Social liberals are often found in the upper socioeconomic strata and look positively upon globalization and free trade. Economic liberals, in the American sense, are not necessarily social liberals, as is well known in the case of black Americans who tend to support government programs but are more socially moderate-to-conservative. Combined with the consistent pattern of conservatives outnumbering liberals it would naturally lead one to believe that this is a nation where the Right is eternally ascendant.

And it is certainly true that compared to European nations the United States is conservative on many social and economic metrics.* But is the arc of American history toward a conservative or liberal direction? In other words, what is the probability that there would be a blanket ban on abortion in the United States in one generation? What about the maintenance of federal laws which ban recognition of same sex marriages? Which the proportion of national GDP which consists of government spending?

For all the talk about American exceptionalism the arc of history seems to be moving to the Left, broadly speaking. Despite the reality that the American Left seems weaker in numbers and less coherent a movement than the Right, conservatives have been waging a rearguard battle by and large. The macrohistorical trends are simply not born out by the strength of numbers that conservatives have at any given moment. One might infer from this that there are strong sociocultural dynamics and institutional biases which nudge Western liberal democracies in a Left direction, with the rate of change modulated by contemporary political configurations. And yet perhaps we are too Whiggish, human history has been characterized by secular trends being nested within broader cyclical patterns.

* This has been to be qualified, as many European governments have more restrictive abortion rights regimes, and racial nationalist parties gain more traction in most of Europe than they ever would in the United States.