Metal Detectors Whites Battery
metal detectors whites battery Notebook CPU Package Description In the traditional sense of the package for the chip is just a shell, is a mechanical structural protection; but in the current stru...
metal detectors whites battery
Notebook CPU Package DescriptionIn the traditional sense of the package for the chip is just a shell, is a mechanical structural protection; but in the current structural characteristics of the chip package, in addition, it also contains a cooling mechanism, and became the electrical properties of the chip and the motherboard connected platform. Furthermore, the complexity of the package depends largely on the structure of chip features and design methods. This complexity of the CPU chips in terms of its packaging technology more complex. As the package is about the maximum protection of CPU to play its best performance and provide a platform to connect with the motherboard, so the performance and structure of the package is to achieve small size notebook-specific CPU, heat quickly, the characteristics of low power consumption guarantee. CPU high-speed development, the size of laptops, heat and function restriction is undoubtedly a challenge. As a notebook dedicated CPU, in order to meet these requirements, the only thing to do from the package, the article has. In general, what kind of package used often depends on CPU each era of technology and cost factors. For laptops, because of its compact structure, small space, so it directly affects the size of the thickness of laptops and space utilization; its cooling effect of a direct impact on the stability of the machine is running; it will affect the power consumption of laptop battery life. These technical indicators used by CPU and laptops is closely related to the package, so packaging technology for laptops dedicated CPU is concerned, is a very important technology embodied, which is addressed in our notebooks CPU(Dell inspiron 1720 battery) upgrade, you must First, consider the packaging of the problem. TCP (Tape Carrier Package): thin-film encapsulation TCP technology, mainly used on the INTEL Mobile Pentium MMX. TCP packaging technology using heat as opposed to CPU-time regular PGA pin array type CPU is much smaller, used in notebook computers can reduce the volume of additional cooling devices to improve the space utilization of the host, so common in a number of super - thin and light laptop. However, as TCP package is soldered directly to the CPU on the motherboard, so ordinary users can not be replaced. In this writer's give a brief introduction. MMC (Mobile Module Connector): MMX era of mid-and late, Intel introduced a modular package, IMM (Intel Mobile Module) for laptops dedicated CPU, which is mentioned here MMC package form. Using this package is actually a CPU, including CPU, including board, which consists of CPU core, chipset North Bridge chip, voltage conversion components and systems to maintain the temperature detector composed of the bus. MMC is a modular pluggable package, using two special interfaces connect with the motherboard. Has the advantage of using MMC package because it integrates the Northbridge on the motherboard, allowing motherboard designs are being simplified to reduce costs. MMC1: MMC1 package module CPU is Intel notebook-specific CPU times from MMX to Pentium II era of transition products, Intel in April 1998 launched the first notebook dedicated Pentium ? CPU is used in this package, and MMC similar, MMC1 also contains a CPU, including circuit boards, circuit boards difference is MMC1 also includes Pentium II's second-level cache (L2-Cache), and the module integrated into the 440BX chipset North Bridge chipset Northbridge. According to the internal 440BX chipset Northbridge different, MMC1 divided into two kinds of AGP SET and PCI SET. The latter does not support AGP graphics cards but can only use PCI graphics cards. Also worth mentioning is that, MMC1 packaged CPU is also connected through the two slots and the motherboard, a total of 280 pins. MMC1 package on the back, the left two white slots to connect the interface with the motherboard MMC2: laptop graphics card has lagged behind desktop computers, although individual graphics chip maker has developed a slight 3D effect of notebook-use graphics chip, but the lack of CPU support, display effect is still unsatisfactory. To this end, Intel launched in late 1998 to increase the AGP functional laptop CPU. This CPU is still modular, encapsulated in the form of MMC2. MMC2 structure and MMC1 similar to, but MMC2 interface with the motherboard a total of 400 feet for a pin, unlike MMC1 a total of two 280-pin socket. This package forms of CPU most prominent feature is the addition of support for AGP, allowing notebook PC features with the 3D periodic leap. But precisely because of this feature with this CPU-heat relative to teach more, it needs to heat sink, fan and other cooling devices and adopted a set of rigorous thermal design can achieve the cooling requirements. CPU package using MMC2 more common in some performance-oriented all-in laptops. MMC2 package positive, with MMC1 similar radiator for the CPU and North Bridge respectively, the following Mini-cartridge: This is a very "short-lived," the package, only in Mobile Pentium II CPU part of the models appeared. And the MMC package different is that it does not have an integrated chipset North Bridge, the external metal shell was surrounded by only exposed a core part of the Mobile CPU for the vendor install radiator on the back with a similar MMC2 package, there is a plug connected to the motherboard needle, pin count of 240. The general said that more use of BGA-1 or ?PGA-1 package CPU, specifically what is the difference between the solder balls of their feet or the back of the pin. BGA -1 and ?PGA-1 (Micro-PGA-1): In a sense, BGA-1 and ?PGA-1 package types, Mobile CPU is our understanding of the CPU, these two packages so that she returned to CPU to a single chip package. In both packages, the entire CPU core part of the (Die) is soldered directly to the substrate, from the figure we can see, CPU is located in the core of the center of the substrate. This package approach is also a manifestation of technological progress, represents the beginning of another packaging technology. Relative to the CPU in terms of MMC packages, BGA-1 and ?PGA-1's great advantage is its ultra-thin features, can be seen from the figure, using these two packages very small size of the CPU, and the former also can be directly welded on the motherboard, so a number of ultra-thin laptops to meet the design requirements, to reduce the thickness of notebook body played an important role. In particular, starting from the Mobile Pentium III, with a light laptop, thin in vogue, these two CPU package will undoubtedly provide an excellent solution. BGA-1 package CPU positive BGA-1 package CPU on the back, pay attention to the figure as "solder ball feet" ?PGA-2 package and CPU on the back, pay attention to the figure shows the pin instead of the solder ball BGA-2 feet Micro-FCPGA (micro Flip Chip Plastic Grid Array) and Micro-FCBGA (Micro Flip Chip Ball Grid Array) From the structural design point of view, these two packages are attached to BGA and ?PGA packaging, and the BGA-1 and ?PGA-1, as well as the BGA-2 and ?PGA-2 are very similar. Micro-FCPGA Chinese called "micro-chips down the plastic grid array", which means the processor package substrate that contains a down installation, the chip package by epoxy materials, the use of 2.03 mm long and 0.32 mm in diameter 478 pin motherboard processor socket contacts. It is with the Micro-PGA package, the difference is that, micro-FCPGA does not interpolation type substrate, while in the bottom of the capacitors are installed for the anti-interference. Micro-FCPGA package diagram, the processor on the back for the pin, and installed anti-interference capacitor used in Micro-FCBGA Chinese called "micro-flip chip ball grid array", the package includes a face surface of the board, by the epoxy material packaged chips. And Micro-FCPGA different is that it uses a bottom 479 of the 0.78 mm diameter solder ball feet connect with the motherboard and another for the anti-interference capacitor installed on the CPU front, rather than the back (pictured) Micro-FCBGA package diagram, the processor on the back foot for the solder ball, positive for anti-interference capacitor installed Micro-FCPGA and Micro-FCBGA(Dell inspiron 6400 battery) is the most mature and most widely used packages, one of the Pentium III-M, Pentium IV-M, as well as the latest Intel Centrino platform, Pentium-M can be seen in its presence. Represents the current notebook-specific CPU packaging technology, the highest level. All times are listed below the main application of notebook-specific CPU package in order to upgrade reference. About the Author As a leading UK laptop battery retailer over the past ten years, We carry nearly all the laptop batteries for brands such as HP, DELL, ACER, APPLE, SONY, TOSHIBA, ASUS laptop ,ect.. All of our laptop batteries come with a 30 Day Money Back Guarantee as well as a One Year Warranty |
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How To Find Meteorites
Meteorite Hunting: How To Find Meteorites
by Eric Wichman
Meteorites USA
Most people don’t know you can own a meteorite much less find one practically in your own back yard. There's a very good chance there's been meteorites found very near where you are right now. There's been over 50,000 meteorites found in the world and 1600 of those have been found right in the united States.
Know Where To Hunt For Meteorites
The first thing you need is a place to hunt. If you live in the southwest U.S. you are in prime meteorite hunting territory. This area of the country lends itself to the preservation of meteoritic material. Because of the southwest’s arid climate, and low annual rainfall, meteorites are more preserved here than in any other part of the U.S. Meteorites contain iron and iron is prone to corrosion, therefore a dryer climate will preserve meteorites for a longer period of time.
That’s why more meteorites are found in the Sahara desert than any other place on earth! Northwest African meteorites (better known as NWA meteorites) are plentiful because the climate is perfect. The Sahara desert covers the entire northern region of Africa!
Anywhere there’s “Old Ground” and the climate is arid, you’ll most likely find meteorites. They’re hard to find and rarer than gold but when you find one there’s a chance there’s more in that area.
Where NOT To Hunt
First and foremost. Do not hunt on land you don't have permission to hunt on. This is perhaps the most important rule in the meteorite world. Trespassing is illegal. Don't do it. People that do, make it harder on the rest of the meteorite community, and it can tarnish reputations and turn people off to the professional meteorite hunters that do follow the rules.
Also, not all terrain lends itself to meteorite hunting. Swamps wouldn’t be a good place to look, but anywhere that is relatively dry, with old ground is a great place to hunt.
You can find meteorites just about anywhere on the planet. The Willamette meteorite for example (the largest meteorite ever found in the United States at 15.5 tons) was found in Oregon of all places. I don’t know if you’ve ever been to Oregon but it rains there in the forested areas almost daily. A lot of the Willamette had weathered away but it still is the biggest meteorite yet to be found in the U.S.
If a chondrite (stone meteorite) falls in the ocean, the iron in it breaks down and will crumble into nothing in a short period of time. Water, humidity, and wind erosion contribute greatly to a meteorite’s demise.
The Elusive Meteorite Strewnfield
If you do find a real meteorite, mark the spot and be sure to search the entire area where you found it. You may have found only a single meteorite from a single fall, but there’s a small chance you might just have discovered what scientists and veteran meteorite hunters call a meteorite strewnfield.
A strewnfield is a section of ground (usually in a long elliptical or semi-circular shape) covering a large area, a 1-10 miles long and 1-5 miles wide. Most strewnfields are smaller 1/2 to a few miles in length and width. Typically, the larger a meteoroid or asteroid is that enters our atmosphere the larger the strewnfield. Unless...
If a meteoroid falls at a very sharp angle then the strewnfield it produces will be smaller and harder to locate as the material will be spread over a smaller distribution elipse. Picture a handful of rocks thrown straight at the ground. They won't cover much area at all. But if you throw a handful of pebbles straight out in front of you the distribution ellipse becomes much greater in size.
Finding a meteorite strewnfield is perhaps the holy grail of meteorite hunting. Meteorite hunters dream of finding their own meteorite strewnfield because of the personal satisfaction and sheer excitement of finding such a rare thing.
Cosmic Treasures
Meteorites are rarer than gold and some are more valuable than diamonds, but they are nothing like the precious metals and stones. You must keep in mind they're not from our planet. They're from out there, in the vast reaches of space. They fly across our solar system and crash into Earth and the feeling one has when one holds a meteorite in their hand is wondrous.
Tools Of The Meteorite Hunter
Let’s start your meteorite hunting adventures off right. You need the equipment. Here's a short list of some of the tools you'll need to make you meteorite hunting successful.
You'll Need This Stuff
The Meteorite Stick
A Good Meteorite Stick is basically a golf club with the head chopped off with a powerful magnet attached on the tip. You'll use this to touch and pick up meteorites on the surface of the ground you are hunting. Meteorite sticks are used for picking up meteorites and as a makeshift walking stick.
A Good Metal Detector
You can find meteorites with a metal detector. But not just any metal detector will do. Though meteorites have iron and can be located with cheap discount store metal detectors, the serious meteorite hunter will spend a little more on a metal detector specifically designed for gold detecting. They're more sensitive and tend to find meteorites at much greater depths.
Whites, Fisher, and Minelab all make great metals detectors that you can use to find meteorites. The Gold Bug Series from Fisher are great for meteorite hunting. Many meteorite hunters like the White's GMT, or even the V-SAT. You can expect to spend about $250 to $450 for a good used detector that will find meteorites.
Buy yourself a few rare earth magnets from these great online suppliers of neodymium magnets.
* K&J Magnetics
* Gauss Boys Super Magnets
* Rare Earth Magnets On Ebay
GPS Locator
Garmin eTrex Handheld GPS Location Device: You absolutely need one of these. It's imperative you have on in the field. Not just for marking the location of your meteorite find for classification, but it’s a must have for wilderness navigation.
Recording meteorite location data is vital to preserving scientifically valuable information. It's a rule in the meteorite community that when you find a meteorite to record it's coordinates, take a photo of the meteorite "in-situ" and the location where it was found, all before removing the stone from it's resting place. This helps ensure that the strewnfield data is preserved and that the information isn't lost.
Garmin is by far one of the best GPS devices money can buy. There are other good brands out there but few with the technology Garmin GPS systems offer at such reasonable prices.
Dig Tool
You’ll use this to dig up your meteorites of course. (Attach A Strong Rare Earth Magnet To The Dig Tool with JBweld or some other epoxy resin, or liquid plastic.) This aids in finding the meteorite faster as most meteorites are magnetic due to the high iron content and will stick to the tool as you dig.
A small pick axe is a must for meteorite hunting. Some meteorites are not magnetic but these are harder to find even with a metal detector, and will not give a signal or a very weak signal when using a metal detector.
Basic Desert/Outdoor Gear
Maps, Backpack, waist pack, a good knife, multi-tool, rope (parachute cord), water, water, water, food, first aid kit, snake bite kit, tire repair kit. If you are traveling by ATV, or 4X4 it’s good to have a tow strap, shovel, two way radios, and extra fuel and water. This list is not all inclusive, you’ll also need a compass, extra batteries for both the radios and GPS, a flashlight, lighter, matches, plastic baggies, trash bags, and a good book to curl up next to the campfire with. A survival kit is always a good idea as well. This can have fishing line, hooks, a few extra matches, band-aids, alcohol swabs, etc… You get the idea. Don’t forget the cell phone!
Finding An Area To Hunt Meteorites
Once you have all the equipment you need, then you need an area to hunt. This is where good solid research comes in. Do a Google search for the keyword phrase “meteorite database” or visit the Meteoritical Society’s website here: http://tin.er.usgs.gov/meteor/ There you will find a database chock full of great information on ALL the classified finds on the US and the world for that matter, complete with GPS coordinates, and Google Earth links for mapping and satellite photos. You can’t beat this for quality in-depth information.
NOTE: Don’t just go searching coordinates you find in the database! Some property may be private land, State land and you cannot hunt there without permission. Get the land owners permission BEFORE you start your hunt. If you are hunting Federal land be sure you have maps! Make sure you know where you are and that it’s legal to hunt that location. This article is NOT meant as legal advise. CYA people. Use common sense. Don’t hunt land you don’t own without permission. Simple as that.
OK, so now what? You have your equipment, your maps, your trusty meteorite stick and an idea of where to search. Well, get out there and hunt.
Meteorite Hunting With A Metal Detector
Meteorite Hunting With A Metal Detector
Familiarize yourself with your metal detector. Buy a few meteorites for calibrating your detector. Once out in the field you can “throw down” the meteorite tune your detector and your off hunting meteorite. Don’t forget to pick the meteorite back up!
Swing Low & Slow
When you’re swinging your detector keep it low to the ground and swing slow and steady until you get used to it. Once you get the hang of it you can speed things up a bit.
Cover Lots Of Ground
There’s a lot of unsearched ground out there. If you grid the area well enough you will find a meteorite, and once you find one you can slow down a bit and search the area a bit more. If you don’t find any more, move on. After a while you will begin to recognize false targets.
Use Your Eyes
Also, don’t forget to “look” for the meteorites as well.
Look for the meteorites with your eyes as well and the detector. Meteorites don't look like Earth rocks. Look for rocks that are out of place or just look odd for the area you are hunting. Look for the dark black or brown fusion crust. A weathered meteorite that has been on Earth for a long time will typically turn a red-brown color and sometimes will be shiny due to wind blown sand erosion.
And remember very few magnetic rocks are meteorites, but most meteorites are magnetic.
Identifying Meteorites
Once you find a stone you think is a meteorite there are a series of tests you can use to determine if your stone could possibly be a meteorite.
To understand how to identify a meteorite you must first know the types of meteorites there are. There is a set of identifying characteristics that most meteorites exhibit that will aid in identification.
Iron & Stone
Typically most meteorites contain iron and tend to be magnetic. Even Stone type meteorites. They are usually heavier and much more dense than ordinary terrestrial stones due in part to their high iron content. Meteorites contain a higher concentrations of nickel than ordinary Earth rocks as well. You can use an off-the-shelf nickel allergy test to test for the presence of nickel.
When viewed under magnification the interior of a stone meteorite will show not only the iron flecks inside the stone, but there are small spherical mineral inclusions called chondrules that will be scattered throughout the matrix. The matrix is the material surrounding the chondrules and iron.
Fusion Crust
Freshly fallen meteorites will also exhibit what’s called fusion crust. This is a thin veneer of black material that is formed on the surface of the stone as the meteoroid enters our atmosphere. Usually this dark black fusion crust looks very much like charcoal on the outside, and if a meteorite is a stone type then they typically have a lighter colored stone interior that looks much like concrete.
Thumbprints
Another very important indicator that a stone might be a meteorite are regmaglypts, or thumbprints. These are indentations, ridges, scoops, and depressions on the surface of the meteorite formed through a process called ablation. This happens while the meteoroid passes through our atmosphere.
The extremely high temperatures that the meteoroid endures melts away less dense material from the surface of the stone and this creates the rounded curves and depressions known as thumbprints. Thumbprints are called such because the human thumb usually fits nicely in these depressions.
Types of Meteorites
There are 3 main types of meteorites. Stone meteorites, iron meteorites, and stony iron meteorites. As the names suggest the stony iron meteorites usually consist of a 50/50 mixture of iron and silicate minerals. There are two types of stony iron meteorites; pallasites, and mesosiderites and they are a very rare type of meteorite and make up about 1%-5% of all meteorites.
Iron meteorites make up about 5% of all known falls, and though this number will vary from source to source most will agree that this is probably accurate.
Stone meteorites (Ordinary Chondrites) make up the majority, about 80% to 95% of all meteorites that fall to earth. They are called chondrites due to the small spherical inclusions called chondrules. These minerals are formed in the vacuum and zero gravity environment in space, hence the reason for their shape.
What if I think I have a Meteorite?
There is much more to identifying meteorites than simply using the techniques mentioned here, but if you have a stone that meets all the characteristics then you just might have a meteorite. The best thing to do would be to contact a university like ASU (Arizona State University) or a meteorite expert which can identify meteorites. There are lots of professional meteorite hunters and dealers online that are happy to help you identify or give you advice on a possible meteorite find.
Meteorite Classification
A meteorite, to be eligible for a name must be classified by a lab and approved by the Meteoritical Society. Once classified by a lab, a meteorite is eligible for a name to be determined usually relating to the place of the find. A perfect example would be the Sikhote Alin meteorite which is an iron meteorite found in the Sikhote Alin mountains in Siberia, Russia.
Meteorites Are All Around Us
Meteorites have been found everywhere on this planet, Antarctica, Africa, North and South America, Russia, China, Europe and Australia. In fact Australia is a great place to hunt for meteorites.
Hunting meteorites is one thing, finding them is quite another story. If you'd like to learn more about meteorites Meteorites USA has a plethora of meteorite information, articles, photos, videos, maps, and even has some meteorites for collectors as well as a meteorite newsletter.
Meteorites Are All Around Us
Meteorites have been found everywhere on this planet, Antarctica, Africa, North and South America, Russia, China, Europe and Australia. In fact Australia is a great place to hunt for meteorites.
Hunting meteorites is one thing, finding them is quite another story. If you'd like to learn more about meteorites Meteorites USA has a plethora of meteorite information, articles, photos, videos, maps, and even has some meteorites for collectors as well as a meteorite newsletter.
© Copyright 2010 Eric Wichman - Meteorites USA - http://www.meteoritesusa.com
About the Author
Eric Wichman is a meteorite hunter, collector, researcher, dealer, enthusiast and founder of the Meteorites USA network of meteorite information websites. The network includes Meteorites USA, Meteorite Blog, and the Meteorite Wiki, and consists of hundreds or articles, photos, videos, and related meteorite information.
Other Articles by Eric Wichman can be found on MeteoritesUSA.com
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