First, the high manganese lithium-rich ternary materials and general patent, there are some conflicts, in short there is no specific boundaries, and non-cobalt-rich lithium two yuan materials can also be seen as a lithium-rich high-manganese species, since the patents are not so fine points, we do not have to dwell on his true definition of a word, to the industrialization of the material is good material.
Speaking of industry issues, as high manganese lithium-rich nickel content is generally less than 10% (according to the American point of view, not doped cobalt, the effect is better, but from our current experiments, it seems not feasible) , on this point advantage in the long term can be mad at ordinary high cobalt content of ternary, because the cobalt as a scarce resource, sooner or later have to withdraw from the size of the cathode material for lithium stage, of course, this is the post-post about later.
High current lithium-rich manganese capacity more than 250 grams of material, but compaction density is difficult to over 2.4, and the current high energy density compared to the ternary material, although the ratio of energy per unit mass obvious advantages, but the ratio of energy per unit volume than Our ternary LNCM-35, and almost no advantage, which is why we delay in product launch one of the reasons.
However, some focus on the energy per unit mass than the customers, the high manganese lithium-rich can not be replaced, so the effective increase in the density of compacted before the lithium-rich high-manganese batteries can only be the darling of the military, industrial short-term difficulties heavy for the following reasons:
1 manganese lithium-rich high-rate performance is not good. To see a yesterday, its capacity to play at 0.5C for up to 270 grams or more, but 1C, the decay would have a great, although another relative, the rate performance is acceptable, but gram capacity only 250 or so, so how to balance good gram capacity is a major issue currently facing, usually to our understanding point of view, cobalt in the triple layered structure for stability and to improve the rate performance irreplaceable role, so low cobalt content of the high manganese lithium-rich material, perhaps increase rate performance was indeed a major issue.
(2) morphology control problems. The high manganese lithium-rich material than the D50 at 10 microns, specific surface area of up to 3.9 and 5.3, if such a high surface area materials into account the stability of its life cycle should not be high. Of course, as the sample does not represent the future direction of development, but from the lithium manganese oxide has a high specific surface area due to side effects and high specific surface area of lithium iron phosphate remained stable under the perspective of considering, in a word, mixed. The key question is how to improve compaction by controlling the morphology of the density.
3 Tap and compaction density is low. As we all know, the activity of the ternary material is just better than in many materials of lithium iron phosphate, which is the rate capability and low temperature performance of lithium manganese oxide slightly less than the reason, the current lithium-rich manganese is high, the tap density is about 1.5, taking into account the topography, in the actual compaction can not be too high, in the general advantages of the application of power products generally. However, given the current morphology control issues, you want to reach the current level of ternary, long way to go.
4 cost. At present, many people know but they can not explain the high lithium-rich manganese is consistency, consistency of the product will undoubtedly increase the cost of lithium-rich manganese and high industrialization process, the current real-life example is lithium iron phosphate, of course, with ratio, the high manganese lithium-rich problem seems to be more elusive.
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This iPad 2 leather case comes with a full-size keyboard, which includes special keys that activate iPad 2 features. Connect to ipad 2 data port, support text inputting, and utilize the keyboard shortcuts to activate the iPad 2 special functionality. This is specially designed for Apple iPad 2. Perfect fitted. It features magnetic closure which made the case holder looks so stylish and cool. Just need £ 31.09
This iPad 2 Foldable Leather Case brand new comes with a full-size keyboard, which includes special keys that activate iPad 2 features. Connect to ipad 2 data port, support text inputting, and utilize the keyboard shortcuts to activate the iPad 2 special functionality.
Features:
1) Access to all the iPad controls and ports
2) Easy to set up, plug and play, 90 hours working time
3) Right side shift button for fast and efficient typing
4) Durable synthetic leather cover protects your iPad 2 in style
5) Adjustable stand securely holds your iPad 2 in landscape mode
6) Bluetooth keyboard delivers wireless operation and includes iPad 2 specific keys
7) It features magnetic closure which made the case holder looks so stylish and cool
It simply opens like a book while providing full protection for the iPad 2 screen
9) Built-in 450mAh rechargeable lithium polymer battery that will last several weeks of normal use
10) It comes with a built-in keyboard that seamlessly connects with the iPad 2 for a quicker and more comfortable typing
Specifications:
1. Material: Leather
2. Battery Capacity: 450mAh
3. Working Time: 90 hours
4. Built-in Keyboard
5. Built-in 2 storage pockets for memory cards
6. Magnetic Closure
7. New in retail box
8. Certifications: CE, FCC, RoHS
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* After use, the rubber band to bind the USB plug
* Close the leather case holder as a notebook
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Durable laptop battery is a lot of people do not encounter the problem, introduce a few laptop battery power saving tips, we want to help.
1, lowering the screen brightness. And while the ThinkPad notebook computer equipped with a keyboard light ThinkLight, but in order to power, it’s best only under the conditions in the dark to enjoy her care.
2, when the wireless receiver when not in use, turn dell batteries off.
3, some users love to open something all right to play music CD or DVD, the battery came out of the music playing quietly flow away. Suggest that you only want to enjoy the music came alive again.
4, the battery discharges, full charge and discharge as much as possible.
5, try to avoid very high or very low temperatures. For example, when you are on the beach when the sun, do not leave your laptop in the car sauna.
6, for your notebook computer using the correct AC adapter.
7, using the standard laptop battery management software optimized for Battery MaxiMiser choose to extend the power of your program.
8, for the display, hard disk and system hibernation set a standby time – because you do not work without the need to make your laptop is still running at full capacity.
9, the role of the Intel SpeedStep technology, the hp laptop AC adapter processor can be based on current load conditions, automatically adjusts speed to avoid a small horse-drawn carts, or the case of a large horse-drawn cart, the overall saving battery consumption.
Lithium-ion batteries have become the mobile phones, laptops and other mobile electronic devices equipped with the basic power, has been used in light electric vehicles and hybrid electric vehicles. However, due to the rapid growth in demand, the cost of lithium-ion batteries become more apparent, due to increased energy density batteries, battery safety incidents have also been reported. Lithium-ion battery industry impending major structural adjustment, power and energy storage battery industry along with the materials, processes and equipment to the direction of major technological innovations.
Materials involved in the safety of the battery, the battery design, manufacturing and application aspects, simply change the cathode material can not completely guarantee the safety of the battery. Only the main materials must carefully select the anode material, electrolyte and battery separator, such as anode for lithium-ion battery materials with carbon materials, metal oxides and alloys, graphite material is still today the main lithium-ion battery anode material, However, its safety performance than hard carbon materials, and lithium titanate spinel anode material has a higher safety performance. Can withstand higher temperatures using a new electrolyte membrane is flame retardant and processing to improve the safety of lithium-ion battery technology.
Affect the safety of lithium-ion batteries are the main factors battery electrode materials, electrolytes and manufacturing processes and use conditions. A cell phone with a lithium-ion battery weighing about 20 grams, the basic requirement is that the probability of occurrence of accidents is less than one in a million, which is acceptable to the public the minimum standards, the reality is even more than one ten-millionth small. Electric bicycle lithium-ion battery pack weight of 3 kg to 4 kg, 100 times bigger than a cell phone, electric cars will use 300 kg to 400 kg of laptop batteries, as electric bus, or the weight of the battery electric trucks will be is 1500 kg to 2000 kg, it is “mobile phone” 75,000 times to 100,000 times. With the increase in battery capacity, a significant increase in the likelihood of security incidents. Therefore, the battery made of lithium-ion battery, it must improve its safety performance, the greater the individual cells require to achieve higher safety index also. Such as mobile phones in use lithium cobalt oxide batteries commonly used, and graphite as lithium-ion battery anode material, the battery after the large-scale security will not be guaranteed.
China started to carry lithium-ion battery electric vehicle research and development, there have been several explosions and burning accidents, one of the main reasons is the use of mobile phone batteries are usually lithium cobalt oxide used as a battery cathode material. Was looking for an alternative cathode material for lithium cobalt oxide is the driving force to address security issues lithium-ion battery R & D a top priority issue. China’s high-power lithium-ion battery safety issues in the “fifth” period to get a better solution. Using modified lithium manganese oxide cathode materials reduces the oxidation of active lithium content is lower than lithium cobalt oxide. Japanese production of lithium manganese oxide monomer capacity is not, as publicly reported for Tokyo Electric Power car 3000 216 13Ah battery is lithium manganese battery.
The cathode, the lithium iron phosphate (LiFePO4) charge state of high thermal stability, oxidation of the electrolyte is low, with better security, can be used to make a bigger battery. LiFePO4 theoretical capacity of 170 mAh / g, compared to lithium voltage of 3.5V, the actual material made of reversible capacities greater than 160 mAh / g. Compared with other materials, LiFePO4 lithium-ion chemical diffusion coefficient in the low electronic conductivity at room temperature is far lower than other cathode materials, need to reduce the material size, coated with dell laptop charger conductive agent approach to improve material performance and the application , caused by defects is low density, cell size is too large and more than the amount of electrolyte. The current research focus is the development of lithium iron phosphate and synthesis of new materials for lithium iron phosphate modified to improve overall performance.
The first synthesis of lithium iron phosphate method is JB Goodenough solid state reaction method. The method is simple, easy to operate, disadvantage is the synthesis of a longer period, the product batch stability difficult to control. How the process of heat treatment and processing of powders to prevent the oxidation of ferrous iron is the synthesis of critical control points. There are a lot of R & D team developed a carbon thermal reduction method, coprecipitation, hydrothermal, spray pyrolysis method.
Can be produced on the current international business with lithium iron phosphate Valence, A123, Phostech and so on. With an ongoing industrial development of lithium iron phosphate are also many companies. According to the Internet survey, 80% of the domestic well-known lithium battery cathode material suppliers are foreign claims its lithium iron phosphate-related products during development and production. And “international professional players’ contrast, from the R & D efforts and time point of view, still in its infancy. Compared to other lithium battery material, lithium iron phosphate are still very young. Some people say that the battery used in electric tools, it was said to be used with battery electric buses, the initial development laptop ac adapter is needed to be encouraged.
Japan in the field of lithium-ion battery has a monopoly, Sony, Sanyo, Panasonic batteries, NEC and other leading companies have built large-scale lithium-ion battery production line, but most manufacturers in addition to maintaining and expanding the production of the original brand, but are use their respective strengths to develop new lithium-ion battery products. Japan’s New Sunshine Project since 1992 with the launch vehicle lithium-ion battery development program, R & D funding of over $ 1 billion, access to technology and technology breakthroughs. Toyota has begun mass production of lithium-ion rechargeable battery, listed in February 2003 for a small car “Vitz” part of the model, the stability to withstand the market test. Hitachi, NEC, Mitsubishi and other companies produce lithium-ion batteries used in electric vehicles and hybrid bulk electric cars, Fuji Heavy Industries launched the Tokyo Electric Power Design using lithium manganese oxide cathode materials for lithium-ion battery electric vehicle “R1e”, quick charge mode, 15 minutes full of 80%, charge 1 can travel about 80km. Maximum speed of 100km / h. Tokyo Electric Power in the year 2006 and then into 30 R1e. In addition, the total import sony laptop battery in 2007 after about 3000. Overall, Japan is still the leading countries battery technology, its power and its key material production battery technology has matured, the performance of electric vehicles has been almost meet demand.
If you just want to use the laptop to do some simple Internet access, text editing work, there is no need to buy the kind of very high-end products, to buy a laptop Celeron M processor will be able to meet your needs. Actual parameters from the point of view, this processor’s performance is bound to have a good performance, while Lenovo recently introduced for Celeron dual-core notebook, which can not be said for the compaq presario a900 battery consumer is a very good the news. Again, if your budget is not very adequate, then select the Celeron dual-core models is still very cost-effective, after all, when dealing with multi-tasking, single-core dual-core processors is still very obvious advantages. But people do not understand is, T1400, and had been naming the identical Core Solo, Intel really do not understand why in such a way.
Pentium dual-core processors can be said that the emergence of Core Duo to make up for the relatively high price of supply, its appearance is the twists and turns, from there it was called “illegitimate children.” But the Pentium dual-core hp probook 6440b battery performance is more powerful, it can be said without the emergence of dual-core Pentium, dual-core notebook development would not be so quick. Intel Pentium dual-core before it is blocked by an AMD dual-core low-end market in the wave of the attack, and have also recently introduced two Intel Pentium dual-core processor T2370 and T2390. Pentium dual-core can be said that the development has gone through three stages, from initial T2050, the T2330, then T2390, can be said that the emergence of a CPU each gave us some surprises.
Core Duo is the first appeared on the market dual-core notebook processor, its strong performance, maximum power consumption of only 31W, then the introduction of broad interest, but because of relatively high-end market positioning, it will be used only in high-end Core Duo notebook dual-core processor, but also a direct result of the Pentium dual-core generation. General version of the Core Duo can be divided into two categories, T2300E into a separate class, and the only difference is that T2300 does not support Intel Virtualization Technology, and T2300E is a direct result of a lot of companies “for the core” events. Few can say that the use of the new Core Duo products, even if there is still a lot Wei Huo, there may be only a few hp compaq business notebook 6720t battery such as Hewlett-Packard as part of a new product using the series of the CPU. We also try to buy when the eyes wide open, to ensure that their interests are not lost.
It can be said Core Duo processor performance is very good, but this corresponds to power consumption is quite high, reaching 31W, resulting in a notebook battery life time but shorter than before. Intel certainly do not want to lose customers seeking portable, so the introduction of the TDP is only 15W of the L-series processors. Only a small part of the model using the L-series of sony vgp-bps9/s battery processors, because it is for the portable notebook market, the price is still relatively high. But now rarely seen in the market, the use of L-series notebook, after all, is the product of a few years ago.
There is a demand may, Intel introduced the power consumption is only 9W of ultra-low voltage Core Duo processor-U series, the working voltage of 0.975 volts, energy-saving effect is very good, but slightly lower frequency, is the ultra-thin hp compaq business notebook 6735s battery, ideal for ultra-portable notebook processor. It can be said ULV Core Duo processor family is definitely the elite, the highest TDP of just 9W Intel shows remarkable strength in technology, it is only used in ultra-portable notebook and UMPC above, price is very expensive.
Usually when a user first purchased peripheral products they want to go to choose a good understanding of peripheral products prices, and then sufficient time to prepare, prevent fraud and the time of purchase are not fakes, refurbished goods and other substandard products .
Computer peripheral products to distinguish true and false
Under normal circumstances would be considered major brand manufacturers to market their products to do the security measures the user via SMS, telephone, Internet to check the product between true and false. Identify the process in order to avoid false tracking number, it is recommended to buy the product before the product’s Web site first to find out the product, while a note posted on the website of the security check numbers, purchase the product reference number contrast can be seen through false security number. Some products support online queries, which query method is more reliable. Also to note is genuine in the packaging and products have their own product identification, product specifications will be marked on the product model, accessories and quantity, in the open the packaging must check the accessories are complete.
Secondhand and refurbished computer peripherals to identify goods
Mainly a closer look on the packaging seal is the first time, the packaging of products and accessories are intact, and inside the control list of inventory items are complete, verify that the product warranty card, packaging boxes, and the body are the same and only a product serial number. Check the appearance of the product is intact, take a look at some of the gap there is no fingerprints, dust, fibers, products at the bottom of the foot pad, screw, plug the interface has not used at the scene. If you are afraid to buy second-hand and refurbished products, the best way is to go directly to the regular high degree of credibility, where to buy the business.
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Steve Jobs sold after the death of his autobiography, hot, and then one topic which has caused heated discussion, we can see from the autobiography, Apple’s Steve Jobs in China tend to disproportionately large number of workers employed, and the U.S. current high unemployment rate, the problem become a hot topic in the media debate. Several celebrities have a large number of Apple hiring workers in China have opinions. For example, the U.S. truck drivers’ union President Jim Hoffa on the CNN anchor Candy Crowley said: “All of Apple’s investment on China rather than the United States, I think the president should challenge the patriotism of these U.S. companies.”
CNN anchor Piers Morgan and Donald Trump on the talk, they made a similar statement. Morgan said: “The people who work for Apple in China, more than the United States.” Trump has strong views on manufacturing overseas production, he believes, should work to prevent the relocation, should be their own products. CNET reported that according to “Steve Jobs Biography” records that when Steve Jobs and the U.S. president last meeting, had recommended not to allow the U.S. to become more suitable for the manufacturing environment. The 45-minute meeting, Steve Jobs stated how easy to build a factory in China, but because the cost of unnecessary regulation and other relations in the United States is almost impossible to reach the same way.
Jobs also believes that the U.S. should develop a more engineers, Apple in China, 70 million workers, engineers, led at least 30,000, but Apple was unable to find enough qualified American engineers. Americans might really like Foxconn, like workers in the assembly of the iPhone? If you really, really profitable Apple do? Apple engineers can find everything you need it?
First put these assumptions aside, CNET columnist Brooke Crothers that the fact that Apple has now assembled in China sourcing parts, the focus is also possible from a majority of Apple’s products are manufactured in the U.S. corporate purchasing components it? At this stage Apple’s MacBooks and Macs with Intel chips are all products (most plants are in the U.S.), but the best sellers iPhone and iPad are mostly produced by Foxconn assembly, component suppliers in Asia are using other products.
According to biography, Steve Jobs is actually advocating the iPhone and iPad are using Intel chips, but Apple was when he was senior vice president Tony Fadell opposition, he thinks the UK should use ARM’s chips, which is difficult to conclude whether the correct . Brooke Crothers noted that the recent rumors, Apple may start and Globalfoundries to discuss cooperation, Globalfoundries recently in upstate New York in the United States to build a large chip manufacturer, has begun production of ARM 28-nanometer chips. Therefore, the future for Apple Globalfoundries plant started production of the U.S. A6, A7 chip is not impossible. In any case, Brooke Crothers believes that if Apple needed, should be able to find cooperation in the United States manufacturers, without affecting its successful production strategy.
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First: Turn off unnecessary programs
Second: Clear the clipboard contents.
1 point — Programs — Run, type “CLipbrd”, brings up the clipboard viewer, in the “Edit” which point “delete”, select “Remove All”, select “Yes.”
(2) remove the clippings Office
Third: a reasonable set of virtual memory. Open the Control Panel, double-click System, within the selected properties in the System Properties, open the virtual memory, this value is set to default values.
Fourth: increasing the availability of disk space
1 Empty Recycle Bin
(2) delete the temporary files. Right-disk space, select Properties, points Disk Cleanup will remove the temporary files
3 files on the disk delete expired
4 never used to delete files
Fifth: to re-install the program has been damaged
Sixth: The use of optimization software to optimize the system memory
Seventh: Restart the computer. If you just close the program, but did not restart the computer, the program may not be completely back to the system memory
Eighth: to reduce the automatic running program. Point — Run, type Msconfig, open the System Configuration Utility and select the software, click the General tab, select Selective Startup, and remove the “Win.ini” file and “Load Startup Items Open the” Start ” tab will not run automatically shut down
Ninth: killing the virus. Clean up the chassis, and then anti-virus! Your patience and meditation to improve a grade! Master the use of windows to optimize what you can refer to the following optimization method to optimize my computer – Properties – Advanced – Startup and repair point “error report”, select “Disable error reporting” ” However Notify me when critical errors occur “; remove the” Write an event to system log “,” Send an administrative alert “,” automatically restart “option; the” Write Debugging Information “set to” None “;
Click on “Edit” in the pop-up notepad file:
[Operating Systems]
timeout = 30 / / the default time of 30 seconds to 0 seconds
multi (0) disk (0) rdisk (0) partition (1) \ WINDOWS = “Microsoft Windows XP Professional” / fastdetect / / the default fastdetect to nodetect
Registry modification method: “HKEY_LOCAL_MACHINE \ SYSTEM \ ControlSet001 \ Control”, SystemStartOptions key to NODETECT
Turn off “System Restore” function: the specific operation as: Right-click “My Computer”, click Properties, System Properties dialog box will pop up, click “System Restore” in “on all drives in the Turn off System Restore” option on the tick.
Turn off “auto update” function: the specific operation as: Right-click “My Computer”, click Properties, click the “Automatic Updates” in the “Notification Settings” section select “Turn off automatic updates and I will manually update the computer” a .
Close the “Remote Desktop” feature: optimization, “Visual Effects” set: Right-click “My Computer”, click Properties, click the “Advanced” in the “Performance” column, click on “Settings”, click on the “visual effects”, Here you can see the appearance of all the settings, you can manually remove some unwanted features.
Optimization, “Startup and Recovery” settings: Right-click “My Computer”, click Properties, click the “Advanced” in the “Startup and Recovery” section, click the “Settings”, where “system failure” column , the auto-restart, no debugging information. Disable “error reporting” feature: Right-click “My Computer”, click Properties, click the “Advanced” → “error reporting”, select “Disable error reporting” feature
Close the “Internet time synchronization” function: Please click “Start” → “Control Panel” → “Date, Time, Language and Regional Options”, then click “Date and Time” → “Internet time.”
Click the “Start” → “Run”, type the command “services.msc”, open the “Services” dialog box, (Note: You must be Administrator or Administrators group to complete the login process if the computer is connected, the network policy settings may also prevent you from completing this step.) “Clipbook Server” (folder server): This service allows other users on your network see your folder. Here I would strongly recommend that you change it to manual start, and then use other programs to publish information on your network.
Open a text file, then insert the following in one: Mystring = Space (16000000) or Mystring = Space (80000000), you only need to insert them one. Save the file as memory.vbs. If you installed the Visual Basic 4 (or later) to run the file, then you can always double-click the program to run it. Switch to the “System Properties” window, open the “Advanced” in the “Performance Options”, the default virtual memory is about 1.5 times the actual memory, in fact, we want to run multiple large programs, these “memory” is not enough The system memory may also prompt a warning.
Click the “Change”, by default, the “virtual memory” is created in Windows 2000 where the system disk, here’s “drive page file” is just referred to as “virtual memory”, which is based on the file of the form , the following are recommended values and the current use of space. For instance, we in the “Initial Size” field, enter “240″, “max” input “500″, then click the “Settings”, point to determine.
After the above settings change, you can press “Ctrl + Alt + Del” to open “Windows Task Manager” dialog box, click the “performance” in the lower right corner you can see the memory usage, with the above optimization, the memory footprint should be in the tens of MB, is not feeling a little faster. Periodically run ScanDisk and Defragmenter, especially for the most likely to accumulate debris disk systems. Do not install too much software, including games, if you need to do that, in the original system and the necessary software installed, you should do the GHOST system disk file, so the best time to restore the system state.
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Apple has not released an official iPhone 4S memory capacity, which makes a lot of curious people use a variety of third-party software, or even X-ray scan of the chip to explore the iPhone 4S How much memory. After all the validation, we found that the A5 processor in the iPhone 4S with last year’s iPhone 4 and the first generation, like the iPad A4 processor, which is only 512MB of memory.
In addition, many competitors tablet PCs and smart phones have the memory capacity of up to a 1GB or more, which makes a lot of people do not understand Apple is very stingy. But Apple does not currently recognize or Why the A5 processor memory with so little comment. But Microsoft’s Windows chief Steven Sinofsky in a blog that Windows 8 is an important project component is to significantly reduce system memory requirements for the core runtime. Although this system requires the use of as little as possible the content has not a new point of view. But Sinofsky describes the Microsoft Performance team point of view.
Experimental group’s director Karagounis said content usage can greatly reduce the battery life, he said that the memory will always be loss of energy, if the system is using too much memory, then the battery time will be substantially reduced. Therefore, from Microsoft to Apple engineers may limit the interpretation of the purpose of memory, because memory is installed, if not practical will consume a lot of power.
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CULV, full name Consumer Ultra Low Voltage. CULV processor that is for the consumer notebook market, ultra-low voltage processor. CULV is typical: 10W ultra-low power consumption (single core to 5.5W), 45nm process, the Core 2 architecture. CULV processor with the upcoming Core 2 SU9600 (1.6GHz) and Core 2 SU3500 (1.4GHz). The former is a dual-core, which is a single core. Their wholesale price was 262 and 289 dollars. These processors are equipped with 4 series chipset, constitutes CULV platform.
In the just concluded CeBIT2009 debut on the MSI X340 notebook is representative of CULV notebook, it is thin blade, quite the MacBook Air’s style. X340 was able to do so thin, it is thanks to CULV processor platform. With the 45nm Core 2 P series and T8 series processor power consumption is 25W and 35W, much higher than CULV processor. Significantly lower power consumption means that the machine’s cooling components can be significantly reduced, the circuit design easier, the body can be made very thin. In other words, CULV the most typical products, which is 11 inches to 13-inch thin notebook.
In the second quarter of this year Intel will introduce a new set of consumer ultra-low voltage, CULV platform, specifically for the 699-899 dollar price of the field of ultra-thin portable notebook, which is the new platform, AMD Yukon market space. Intel has quickly won the support of the industry, Hewlett-Packard, Dell and other notebook manufacturers are already preparing to release new products based on CULV platform, these notebooks are expected this year, shipments of up to 10 million. In 2009, Intel plans to notebook market is divided into four blocks: 12.1-inch and larger size of traditional notebook, Atom-based Netbook, based on Menlow platform MID, 11.x-13.3-inch in size between the ultra-portable notebook.
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When you are in the application of the Linux operating system, Internet, may encounter hackers, the Linux operating system against hackers, some of the practical skills introduced. Linux is a multi-user system, once people get to your root user, he can do whatever they want on your system, because the single-user system with full control permissions, if the improper operation or others to enter, then the consequences will be unthinkable, how to prevent a single user entry, the following areas for attention.
1, the / etc / inittab file for protection, if the id: 3: initdefault to a 1 in 3, you can boot directly into each single-user mode. On the / etc / inittab file to root, enter through the chown 700 / etc / inittab the property to other users can not modify on the line.
2, if the method used by lilo to boot, possibly through linuxconf or directly modify lilo.conf to boot time waiting for input when set to 0 or the shortest line. In this case, if into single user mode, you can use floppy disks to boot.
3, if you use the GRUB boot mode, the simplest way is to use GRUB password protection on startup option.
4, in order to prevent others from remotely destroyed the system to restart, in addition to the ROOT password and / etc directory files for effective management, but also should set the password on the CMOS, so that even if the system into single user mode, and can not directly start the computer to operate.
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