I don't know what you've encountered, but I've designed mechanical systems (HVAC, plumbing, fireprotection) for dozens of server rooms/UPS rooms/data centers over the years. Except for the smallest ones, almost all of the server rooms have had raised floors, though the raised floor is not always used for airflow. I disagree with you about cable management in a raised floor. Getting all the power and data cables from overhead to rows and rows of racks is not easier, and far uglier, than running them thru the floor. Most medium to large centers I've worked in have run cable tray mains overhead and all the distribution underfloor. In fact, many office buildings run the power and data out to the workstations in cast-in-floor ducts. Several buildings I've worked on lately have had raised floors throughout the office space (400,000 sq ft +) running power and cable to the workstations, and even using the raised floor for general office cooling and ventilation air.
Don't laugh. I once got a call about cooling problems in te server room of a major credit card company call center. Turned out that there was all sorts of garbage stored under the raised floor, blocking the air flow. No beer, but plenty of old phones, cables, and manuals.
Lower power chips can save power for running the servers and for cooling them, but advances in chip performance and power haven't helped the cooling problem at all. The typical response to having lower power chips has historically been to cram more processers into the same space, leaving cooling just as problematic.
Using the cold of outside is not uncommon. Doing this by dumping unconditioned outside air into the space is. An Air-to-Antifreeze heat exchanger ("dry cooler") is used outside and the cooled antifreezse is pumped to the inside to do the cooling. Evaporative humidification is another way of getting "free" cooling.
Maybe it's useful if you're typing a novel, but it's terribly annoying at work, where I write technical reports and specifications. I get suggestions like (not necessarily verbatim): "Shall" is considered archaic. You should use the more modern "will". - Well, in the context of specifications the word "shall" is considered a direction. "Will" could be considered a prediction, though, I suppose I could get away with using "will", it would be uncommon. You've started the last three sentences with the words "The Contractor shall", consider rewording - No thanks, that's what I meant to write. Not to mention the usual abbreviations and conventions that get flagged as mistakes, and your "evil" passive voice. By the way, passive voice is not evil at all, it is only bad when it is used where actor should be the focus insted of the acted-upon, which is not always. In the end, it is clear communication that is important, contracturally important in the case of specs. The grammer checkers I have seen never have properly handled these kinds of documents
VHS hasn't quite died yet. It has already lived a significantly longer life than the current (incompatible with each other) DVD formats will. The rush to continuously upgrade to the newest, "best" format almost guarantees that new formats won't last as long, and is already a problem with archiving. Before you know it, persistant solid state memory will surpass disc-based systems for storage. Magnetic tape has been around a long time, and although there are problems with magnetism and heat, these are well known and usually controllable. DVDs, especially those writeable by the consumer, might not prove as durable as tape, depending on the dyes used and the other materials. In general, the more info you pack into a smaller space, the more fragile the data is.
At a given place, in a given year, 0.04 deg C is next to nothing. But on a global scale, over a number of years, continuing to break the previous record by 0.04 deg C adds up to an ecological crisis. 1/2 a degree can have a huge impact when it's the difference between below freezing and above freezing. It can accelerate the beginning of spring weather and delay the onset of winter. This can lead to extinctions of cooperative species when plants that bloom before the pollinating insects arrive. Also, the global changes are not spread out evenly, so that tropical areas are not as affected, while the poles are losing ice at an alarming rate, which creates a positive feedback because the white snow and ice is no longer reflecting sunlight. It's like we are playing with fire without realizing how bad it can get if we don't contain it. I believe our great-grandchildren will be reading in their history books about how short-sighted we were.
O degrees Celsius is 273.15 degrees Kelvin. One degree difference is defined to be the same in both scales. The triple point temperature of water is 273.16 Kelvin. The triple point is a temperature and pressure where liquid water, water ice, and water vapor coexist in equilibrium. It's a more useful point to pin down your temperature scales, since the freezing point of water changes some with pressure, but at the triple point, a single temperature and a single pressure are both determined.
Uh, excuse me, but I'm a mechanical engineer in the construction industry, and I don't appreciate your comment. In fact, you seem to have gotten it backwards. In my experience, it is much more common for the architects and engineers to design and specify the forest, but leave the trees up to the contractors.
Yes, there is only one option to save as 97/2000/2003. However, I have personally saved Word documents in Office XP which appeared different when opened in 2003 and vice-versa. Usually it is small annoyances like an apostrophe appearing as an equal sign, or some other non-alphanumeric becoming a ? or an @ or something. Once or twice it has been a complete mess with mangled numbered lists or outline formatting. Of course, those are so poorly implemented in MS Word that I've occasionally had problems with those even using the same computer with the same MS Office installation.
There is a lot of water vapor in the air, and it is a greenhouse gas. The warmer the climate, the more water evaporates into the air, the more heat is trapped, and it gets even warmer, at least to a point where cloud cover reflects light.
Methane is a much more effective greenhouse gas than CO2. The advent of civilization and agriculture roughly around 6,000+/- years ago significantly increased the amount of methane, though there are a lot of natural sources of that as well.
Even more effective greenhouse gases include refrigerants and other manmade chemicals not common until the industrial revolution. There are no siginificant natural sources of R-22, R-11, R-12, etc. and several other manmade chemicals.
Some particulate pollutants, manmade and natural, reflect sunlight and cool the earth, some reflect sunlight and cool the earth.
There is much uncertainty in the particular changes in climate that may hit a particular area, but there is no question that the models back up the general trend - it is getting hotter and human activity is a significant contributing factor to that trend.
Re:Often programmers know very little...
on
Flash, Meet Sparkle
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· Score: 1
Everyone hide in your own little specialty hole, don't communicate beyond established channels, don't concern yourself with what others are doing. Hey, we need to get a handle on the big picture, let's get a big picture specialist! As a specialist, the big picture specialist doesn't need to know the details of what's going on in the trenches . . . So our design doesn't have to be grounded in real life. Great Idea! I'm not a programmer, but I've actually seen this in other situations.
The irregularities cause a thinner boundary layer.
There is a point of least pressure long the top of the wing. As the air passes that point, the pressure begins to increase. At some point, the slow moving air in the boundary layer doesn't have enough momentum to overcome this pressure gradient. Creating small scale turbulence within the boundary layer causes mixing with the higher velocity airstreams outside of the boundary layer, bringing more momentum into the boundary layer. More momentum means the air can travel farther along the curve of the wing without separating.
Using smaller wings at a higher angle of attack could make the plane lighter, but would overall need more energy to fly, as the "lift" would be directed back more.
Many before the Wright Brothers were able to get self-powered, heavier-than-air vehicles off the ground.
What the Wright Brothers were successful at was their use of control surfaces, enabling them to steer the plane around a figure eight course and demonstrate more stability and controlability than their competition.
Darwin didn't get a business visa, he didn't even have a job. But, he was a spoiled rich kid with a lot of free time on his hands, and no playstation to interefere with his studies.
Any radio frequency noise that Bell accidentally broadcast never interfered with anyone's reception.
Marie Curie didn't get a permit, but she did die of luekemia almost certainly caused by her naive handling of radioactive materials.
Maybe if Cook had respected the native environment, including the people, he wouldn't have been speared to death in Hawaii.
Unfortunately for me, my company has at least one client that requires us to use Word with "Track Changes" on, so that they can see every place their specifications are modified. I don't know why they can't just "Compare Documents, but their requirement completely stops me from using OOo.
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I don't know what you've encountered, but I've designed mechanical systems (HVAC, plumbing, fireprotection) for dozens of server rooms/UPS rooms/data centers over the years. Except for the smallest ones, almost all of the server rooms have had raised floors, though the raised floor is not always used for airflow.
I disagree with you about cable management in a raised floor. Getting all the power and data cables from overhead to rows and rows of racks is not easier, and far uglier, than running them thru the floor. Most medium to large centers I've worked in have run cable tray mains overhead and all the distribution underfloor. In fact, many office buildings run the power and data out to the workstations in cast-in-floor ducts. Several buildings I've worked on lately have had raised floors throughout the office space (400,000 sq ft +) running power and cable to the workstations, and even using the raised floor for general office cooling and ventilation air.
Don't laugh.
I once got a call about cooling problems in te server room of a major credit card company call center. Turned out that there was all sorts of garbage stored under the raised floor, blocking the air flow. No beer, but plenty of old phones, cables, and manuals.
Lower power chips can save power for running the servers and for cooling them, but advances in chip performance and power haven't helped the cooling problem at all. The typical response to having lower power chips has historically been to cram more processers into the same space, leaving cooling just as problematic.
Using the cold of outside is not uncommon. Doing this by dumping unconditioned outside air into the space is. An Air-to-Antifreeze heat exchanger ("dry cooler") is used outside and the cooled antifreezse is pumped to the inside to do the cooling.
Evaporative humidification is another way of getting "free" cooling.
Maybe it's useful if you're typing a novel, but it's terribly annoying at work, where I write technical reports and specifications. I get suggestions like (not necessarily verbatim):
"Shall" is considered archaic. You should use the more modern "will". - Well, in the context of specifications the word "shall" is considered a direction. "Will" could be considered a prediction, though, I suppose I could get away with using "will", it would be uncommon.
You've started the last three sentences with the words "The Contractor shall", consider rewording - No thanks, that's what
I meant to write.
Not to mention the usual abbreviations and conventions that get flagged as mistakes, and your "evil" passive voice.
By the way, passive voice is not evil at all, it is only bad when it is used where actor should be the focus insted of the acted-upon, which is not always.
In the end, it is clear communication that is important, contracturally important in the case of specs. The grammer checkers I have seen never have properly handled these kinds of documents
VHS hasn't quite died yet.
It has already lived a significantly longer life than the current (incompatible with each other) DVD formats will.
The rush to continuously upgrade to the newest, "best" format almost guarantees that new formats won't last as long, and is already a problem with archiving. Before you know it, persistant solid state memory will surpass disc-based systems for storage.
Magnetic tape has been around a long time, and although there are problems with magnetism and heat, these are well known and usually controllable. DVDs, especially those writeable by the consumer, might not prove as durable as tape, depending on the dyes used and the other materials. In general, the more info you pack into a smaller space, the more fragile the data is.
At a given place, in a given year, 0.04 deg C is next to nothing.
But on a global scale, over a number of years, continuing to break the previous record by 0.04 deg C adds up to an ecological crisis.
1/2 a degree can have a huge impact when it's the difference between below freezing and above freezing. It can accelerate the beginning of spring weather and delay the onset of winter. This can lead to extinctions of cooperative species when plants that bloom before the pollinating insects arrive.
Also, the global changes are not spread out evenly, so that tropical areas are not as affected, while the poles are losing ice at an alarming rate, which creates a positive feedback because the white snow and ice is no longer reflecting sunlight.
It's like we are playing with fire without realizing how bad it can get if we don't contain it. I believe our great-grandchildren will be reading in their history books about how short-sighted we were.
O degrees Celsius is 273.15 degrees Kelvin. One degree difference is defined to be the same in both scales. The triple point temperature of water is 273.16 Kelvin. The triple point is a temperature and pressure where liquid water, water ice, and water vapor coexist in equilibrium. It's a more useful point to pin down your temperature scales, since the freezing point of water changes some with pressure, but at the triple point, a single temperature and a single pressure are both determined.
Uh, excuse me, but I'm a mechanical engineer in the construction industry, and I don't appreciate your comment. In fact, you seem to have gotten it backwards. In my experience, it is much more common for the architects and engineers to design and specify the forest, but leave the trees up to the contractors.
Yes, there is only one option to save as 97/2000/2003. However, I have personally saved Word documents in Office XP which appeared different when opened in 2003 and vice-versa. Usually it is small annoyances like an apostrophe appearing as an equal sign, or some other non-alphanumeric becoming a ? or an @ or something. Once or twice it has been a complete mess with mangled numbered lists or outline formatting. Of course, those are so poorly implemented in MS Word that I've occasionally had problems with those even using the same computer with the same MS Office installation.
Carbon Dioxide is not the only greenhouse gas.
1 .html= F9374686-2B35-221B-635B1D2A02A8B6D5&methodnameCHAR =&interfacenameCHAR=browse.cfm&ISSUEID_CHAR=F9214C AB-2B35-221B-641728E52ACE63F4&ArticleTypeSubInclud e_BIT=0&sequencenameCHAR=itemP
There is a lot of water vapor in the air, and it is a greenhouse gas. The warmer the climate, the more water evaporates into the air, the more heat is trapped, and it gets even warmer, at least to a point where cloud cover reflects light.
Methane is a much more effective greenhouse gas than CO2. The advent of civilization and agriculture roughly around 6,000+/- years ago significantly increased the amount of methane, though there are a lot of natural sources of that as well.
Even more effective greenhouse gases include refrigerants and other manmade chemicals not common until the industrial revolution. There are no siginificant natural sources of R-22, R-11, R-12, etc. and several other manmade chemicals.
Some particulate pollutants, manmade and natural, reflect sunlight and cool the earth, some reflect sunlight and cool the earth.
There is much uncertainty in the particular changes in climate that may hit a particular area, but there is no question that the models back up the general trend - it is getting hotter and human activity is a significant contributing factor to that trend.
http://www.eia.doe.gov/oiaf/1605/ggccebro/chapter
http://en.wikipedia.org/wiki/Greenhouse_gas
http://www.sciamdigital.com/browse.cfm?ITEMIDCHAR
Everyone hide in your own little specialty hole, don't communicate beyond established channels, don't concern yourself with what others are doing. Hey, we need to get a handle on the big picture, let's get a big picture specialist! As a specialist, the big picture specialist doesn't need to know the details of what's going on in the trenches . . . So our design doesn't have to be grounded in real life. Great Idea!
I'm not a programmer, but I've actually seen this in other situations.
The irregularities cause a thinner boundary layer.
There is a point of least pressure long the top of the wing. As the air passes that point, the pressure begins to increase. At some point, the slow moving air in the boundary layer doesn't have enough momentum to overcome this pressure gradient. Creating small scale turbulence within the boundary layer causes mixing with the higher velocity airstreams outside of the boundary layer, bringing more momentum into the boundary layer. More momentum means the air can travel farther along the curve of the wing without separating.
Using smaller wings at a higher angle of attack could make the plane lighter, but would overall need more energy to fly, as the "lift" would be directed back more.
Many before the Wright Brothers were able to get self-powered, heavier-than-air vehicles off the ground. What the Wright Brothers were successful at was their use of control surfaces, enabling them to steer the plane around a figure eight course and demonstrate more stability and controlability than their competition.
Darwin didn't get a business visa, he didn't even have a job. But, he was a spoiled rich kid with a lot of free time on his hands, and no playstation to interefere with his studies. Any radio frequency noise that Bell accidentally broadcast never interfered with anyone's reception. Marie Curie didn't get a permit, but she did die of luekemia almost certainly caused by her naive handling of radioactive materials. Maybe if Cook had respected the native environment, including the people, he wouldn't have been speared to death in Hawaii.
Unfortunately for me, my company has at least one client that requires us to use Word with "Track Changes" on, so that they can see every place their specifications are modified. I don't know why they can't just "Compare Documents, but their requirement completely stops me from using OOo.