Archive for the ‘tool’ tag
Metric Reversible
Metric Reversible
Types Of Sediment Filters
Untitled Document
All sediment filters have one thing in common, filtration capability based on micron (µm) size. By definition, a micron is "a metric unit of length equal to one millionth of a meter" which is extremely small to the naked eye. The diameter of a human hair is roughly 25 microns. If a filter is rated to be 5 micron nominal then it means that 80% of pores on that filter are 5 micron and the rest could be larger. If a filter is rated to be 5 micron absolute then 99.9% of the pores are 5 micron and the rest could be larger. All sediment filters lower the water pressure of a given water source. Sediment filters require very little water pressure to operate – about 5 psi.
Spun "Melt blown" Sediment Filters
These types of filters are most economical and are most widely seen on the market. They are noticeable for their hard cotton-like appearance. Typically, these are made of 3-4 different layers and are usually made to have the largest micron on the outer most layers to the smallest micron on the inner most layers. The rating of the filter is based on the smallest micron and most inner layer of that filter. Spun sediment filters are ALWAYS made of polypropylene. Polypropylene is a type of thermoplastic that can be melted and bonded which is how the term "melt blown" came about.
Spun "melt blown" filters are typically described to look like a clean white paint roller. Although they are sometimes slightly pleated (circling the sediment filter). These types of imitated "pleated" filters increase the surface area for water to filter contact which ultimately decreases the amount of water pressure drop (which is good). You will never see rubber gaskets on a sediment filter. Rubber gaskets are used to help separate the product water and the source "feed" water and is seen on EVERY other filter except spun filters. Sediment filters are self sealing when properly used.
Their dirt holding capacity is considered to be better than pleated but worse than string wound filters. Their main purpose is to remove silt, oil, grease, and other forms of sand. It is very commonly used as a general filter to remove more than the above mentioned (i.e. dirt, particulate rust/iron, etc).
The micron rating of a spun filter is ALWAYS rated as nominal and NEVER absolute. You will never see a spun filter with an absolute micron rating because of the way it is made.
Spun filters are an all around average filter which can be used in almost any situation.
String Wound Sediment Filters
String wound filters have the appearance of a spool with yarn. They have a lot in common with spun "melt blown" sediment filters. They both have ONLY a nominal filtration and are ALWAYS made of polypropylene. Much like spun filters these also do not use rubber gaskets to seal the filter.
For dirt, silt and sand situations, it is always recommended to use a string wound sediment filter. These have the largest of the pressure drops as well as the largest of dirt holding capacity. It is very common for people with well water to use these types of filters due to the fact that they have large amounts of dirt/sand/silt in their well.
It is not recommended to use string wound filters for water with high amounts of oils and grease. Because oils attach to the surface of the filter, it will deliberately clog the filter. This will increase the pressure drop until it is completely clogged.
Pleated Sediment Filters
Pleated filters are recognized for their paper thin appearance. Their appearance resembles a well folded piece of paper that is in the shape of a circle. These types only have 1 layer of filtration. It can be made of several types of materials that include cellulose, polypropylene, and polyester – each with its own advantages and disadvantages. They require the use of rubber gaskets to seal properly.Pleated filters have the least amount of pressure drop due to the thickness and most of the time can be washed and reused several times before it is tossed away. The surface area of a pleated filter is much larger than any non-pleated filter.
Polyester pleated filters are used for removing suspended solids from water and are the most durable of the pleated filters because of their material. They are the most resistant to bacterial growth. Polyester filters are constructed of pleated non-woven polyester fabric that is bonded on the ends to thermoset plastisol or "end caps." Polyester is resistant to many chemicals and to bacterial damage, making them an excellent choice for removing suspended solids from non-chlorinated water supplies such as lake and well water.
Polypropylene pleated filters are the most economical filters. They have a higher dirt capacity than polyester filters. Polypropylene construction is excellent chemical compatibility. It is a very good general filter like polyester.
Cellulose pleated filters are also used for removing suspended solids from water. Pleated cellulose is bonded to the end caps of the thermoset plastisol. Cellulose pleated sediment filter are designed for use on chlorinated water supplies such as lakes & rivers.
Both absolute and nominal filters are available because of the way these are made. Absolute micron filters are priced higher than nominal filters because of the production cost. For general filtration, nominal microns are more economical than absolute. Absolute is used in more strenuous situations, for example in laboratories, where micron size plays a very important function.
The main purpose for these types of filters is to remove more solidified particulates like grit, sand, particulate rust and other larger sediment particles. Pleated filters have the least dirt holding capacity when compared to spun and string wound filters. Although they may be used for dirt filtration, they may not perform well for dirt holding capacity.
Pleated filters are recommended for homes that cannot afford the pressure drop but have the presence of sand, grit, or sediment particulates.
About the Author
Our duty is to provide excellent water quality information to health conscious and home improvement do-it-yourselfers. Isopure Water - a WQA member since 2005 and continues to strive for improving water quality.
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Drill Guide - DG1
Locking Holder
Locking Holder
How to Avoid Getting Locked Out of Your House
Do you get locked out of your house often? Do you tend to lose your house keys? You know how annoying and frustrating it can be. Can't afford the price tag of having a locksmith come out and change the lock? What if you have to break a window to be able to get back inside your house? Then you have to change that windowpane, that's a bill you weren't intending for this month. Thanks to these economic times, replacing a window might get put off, opening a whole can of worms in terms of home security. Have you considered using key hiders for spare key storage? Can't think of any safe place to hide your spare key?
What if I tell you that there is a unique way to hide spare keys? In fact, there is a collection of spare key holders that can hide spare keys in plain sight next to your door or in your garden. These unique key hiders are different than your conventional key hider rocks. With one of these key hiders, you get rid of the risk of getting locked out of your house.
There is no need to enlist a locksmith for replacement locks nor do you have to break a window to get back inside your place. In fact, I looked around for pricing and made a rough estimate comparison.
- Use a locksmith and replacement locks for one door = about $100
- Hire a handyman and replace a broken window = about $150
- Grab one of these unique key hiders = about $12 + shipping
Are you ready to stay away from getting locked out of your house and shelling out unnecessary money on replacements? And as an added bonus, the series of spare key holders come in ladybug, garden frog, and turtle. They also make great gifts for family and friends. Learn how to hide spare key with a spare key holder.
About the Author
Daysi Gonzalez has been the owner of DaylightGifts.com since 2001. To hide spare key with a spare key holder, visit the key hider page at http://www.daylightgifts.com/non-solar/key-hiders.
Running into the holder? wow that man should be locked up for life!?
next they will start throwing the flag for looking mean at another guy. Good for you steeler fans great game indeed just a shame those damn Zebras are always getting involved. LET THEM PLAY!!!!
had your money on the steeelers? at 6 1/2 the cardinals were still the money winners
Let me see. League rules state that a player can't run into the holder. OK. We get the officials to ignore that rule. What's the next rule you'd like the "zebras" not to enforce? Wait, wait. How about: they don't have to enforce ANY of the rules? That's even better. Then we have no need for the "zebras". Then everything'll be fair. Then a team that didn't want to have a return on its kick off could kick off from its opponent's 12 yard line if it wanted to. Yeah, that's the answer.
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49960 Locking Air Tool Holder
Matco Tools
Matco Tools
Does anyone know where I can find Matco Tool Boxes / Chest at wholesale price?
From my understanding, you can only buy Matco tools and boxes from a dealer. The guys that ride around in the trucks. I don't believe I've ever seen them anywhere else. Good Luck!!
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Q1 Prep on Pro FWD Matco Tools Chevy Cobalt - May 5
Wrench Reversible
Wrench Reversible
I would like to know which is better: Gearwrench or Craftsman reversible wrenches! ?
Besides price difference, is there any difference? I am a big Craftsman fan, but Craftsman cost almost double of that of Gearwrench.
You have to weigh the cost of the tool against the amount of use you'll get from it, along with the fact that the Craftsman hand tool is guaranteed "FOREVER". If the Gearwrench can match that at a lower price, I'd try it.
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Craftsman Cross Force Reversible Ratcheting Wrench
Rand Heavy
Rand Heavy
Used Construction Equipments For Sale
In this rapid evolving world, keeping with competitors is very important, all developing countries are pushing them self to get on top, and have a global dominance or at least to survive in the developing game, but for a country to get fully developed it's important that there should be a strong infrastructure, and to make strong infrastructure, major construction equipments plays an important role.
So the best option for a developing country or poor country to get infrastructure developed over night and also have a good control over economy by not getting it jeopardized, the best option is to go for buying Used Construction Equipments, these Heavy Construction Equipments available are of good quality and are of flexible rates. There are many websites offering a best deal for the equipments. You can get good quality equipment with all its specification and condition of the machine available on internet, in your own area or area near to you; you can find good quality equipment at a very cheap rate.
You can get equipments from top manufacturers such as Caterpiller, Komatsu, Deere, Case, Dozer, Drill, JLG, Ingersoll-Rand, Genie, etc. these name are of the giant companies who are dominating the construction equipment industry, they provide a top quality machines.
In this global economic downfall the wisest decision is to go for used equipments and save money and sustain the economy. however your organisation may be Big or Small all can go for the used products, and as every one wants to do a good business online so you will find reputaed dealers and good service providers.
And at last the bottom line, always verify that you have purchased a right kind of quality machine froma duality dealer and that is the machine you need and not any huge equipment which was never needed for you, as these used construction equipments are cheap one can goo out of control and buy a even bigger machine whhich is never needed to serve the purpose.
About the Author
I write articles about construction equipments and Machinery and have apassion about machies since childhood, i am doing some research about the Benefits of buying used construction equipments for sale
am I doing this workout diet right?
I started a diet and fitness program 2 weeks agao . I drinka slim fast shake for breakfast and 1 cup of cabbage soup for lunch and 1 shake again for the whole afternoon and then 1 cup od cabbage soup for dinne rand wate rin between.
I also run 30 min a day,hoola hoop with wii fit and yoga and strenth training. I went from 179to 177 but then it goe sback up. is this normal? I have never been this big and working hard to change my life. I am bottom heavy and 5'7".
any insites will be great. please no acari diet links i dont bothe rgoing to them so dont watse your time.
I cut out all sweets and heavy foods. I only take in 600-700 calories a day. not by choice bu I have no huge appitate now. how long will it take for me to see true results?
With a regiment like that, you'll be lucky to see any results! It isn't very healthy! You probably won't lose weight, and your body is gonna be very deprived.
Your body probably isn't getting the nutrients it needs since you mostly consume Slim Fast shakes and cabbage as your main food groups... Whenever you do eat those things, they will just stick to you, and your body will absorb them as fat! All your hard work going to waste!
Instead, mix it up with other fruits, vegetables, eggs, chicken, tuna, ect. You know, the basic food pyramid. You can keep your calories low if your main goal is to lose weight. But just remember to mix it up so your body uses it as fuel. Eating the same weak foods like Slim Fast and cabbage will not help you lose weight. Good luck!
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Mike Mentzer tribute (HEAVY DUTY!!)
Head Ratchet
Head Ratchet
Shenzhen High-Tech Industry Investigation And Thinking
80 years, Shenzhen has won "Shenzhen speed" in the world. At the dawn of the new century, when the threshold, there came up with a "Shenzhen speed" have attracted worldwide attention, that is, high-tech industry cluster in Shenzhen, the rapid rise.
Since the 90's output of Shenzhen's high-tech products at an average rate of 61.46% increase. In 1998, total industrial output in Shenzhen ranks No. 5 medium-sized cities, reaching 184.8 billion yuan. One high-tech product output value of 65.5 billion, accounting for 35.4% of gross industrial output value. In 1991, the Shenzhen high-tech product output value was only 22.9 billion yuan, accounting for 8.1% of gross industrial output value.
Comrade Deng Xiaoping's inspection of the South in 1992 gave an important speech, China has set off a wave of reform and opening up a new one. When people lose the policy advantages for Shenzhen to worry about when people have the Shenzhen high-tech industries in order to create new advantages by the brilliant performance, once again walking in the forefront of the trend of China's economic development.
Industrial advantage is the biggest advantage of all the advantages. The development of high-tech industry in Shenzhen to continue to be a good "chef de file" in the most appropriate choice.
Shenzhen people keen to see that in today's world, knowledge of the amount of information in order to geometrically increase the wealth of some countries and individuals have also grown exponentially.
International economic specialization and economic globalization is accelerating, so that high-tech industries have become the most to promote social progress and vitality of the industry. Since 1992, a surge of all-round reform and opening up waves across the country is rising rapidly. Pudong, the rise of the Pearl River Delta "four tigers" aggressive, the Bohai Sea, central and western regions catch up with the pace accelerating in many parts of the policy of attracting foreign investment in Shenzhen also offers more than some of the "three and one compensation" of foreign-funded enterprises in Shenzhen began to leave northward. Shenzhen was a kind of unprecedented pressure.
In 1995, the Shenzhen Special Economic Zone has always been concerned about the cause of General Secretary Jiang Zemin to the Shenzhen people made a major issue: "creating new advantages, higher level."
Long after, the newly appointed secretary of the Guangdong Provincial Party Committee Li Changchun visited several high-tech enterprise in Shenzhen, the irrepressible excitement, explicit requirements for Shenzhen should explore ways to integrate science and technology with the economy.
This is a heavy historical mission. The Shenzhen municipal government leaders in wonder: "creating new advantages," the breakthrough point, where the election?
90 early in Shenzhen, not only faced with a number of strong competitors in the talent, resources, and market competition, but also within itself the emergence of some factors that are constraining the economic development of Shenzhen. Proved, Shenzhen to stand firm in the new round of reform and opening up, "chef de file" position, it must exceed and engage other people can not engage in, inappropriate, or did not expect that wants to engage in industry.
Industrial advantage is the biggest advantage of all the advantages. This has become the consensus of the Shenzhen people.
In the cool-headed analysis of the development trend of international and domestic economic conditions and Shenzhen under the premise of their own, the Shenzhen municipal government leadership that the development of high-tech industry in Shenzhen to create new advantages of one of the best entry point and a breakthrough in cross-Shenzhen the threshold into the new century and continue to be a good "chef de file" in the most appropriate choice.
It is in this line of thought under the guidance of 1990, the Shenzhen Municipal Party Congress made the "advanced industrial base, the third pillar industries" decision. Later, in succession in August 1991, issued an "relying on scientific and technological progress to promote economic development of the decision," in June 1993, announced the "civilian-run technology enterprises in Shenzhen Special Economic Zone regulations." By last year, in February, it announced the "Circular on Further supporting the development of high-tech industry a number of provisions" (ie, 22), introduced a series of preferential policies to support in order to speed up the electronic information, biotechnology and new materials industries.
In June 1998, at the Shenzhen Municipal Committee and second terms of all eight (enlarged) meeting, the Guangdong Provincial Committee, deputy secretary of the Shenzhen Municipal Party Committee Secretary Zhang Gaoli will develop the significance of high-tech industry in Shenzhen made a brilliant, high levels of summary. He said: "Shenzhen High-tech industry is a hope for lasting momentum. Shenzhen industrial upgrading in the walk in front of the country, we must vigorously develop hi-tech industries, making it the Shenzhen special economic and the first economic growth. "
Later, the development of a series of facts have proven that this choice is made in Shenzhen, timely and correct.
Developing high-tech needs three elements: intelligence resources, financial resources, living environment for the development, Shenzhen all have.
In November 1997, U.S. President Advisers, the White House Office of Science and Technology Policy, John - Gibbons led a delegation of U.S. government science and technology to conduct site visits to Shenzhen. To leave, he said: "The development of high technology to have three elements: there must be a good idea that the intellectual resources; a corresponding financial and financial resources; also need a good living environment for development. But these three aspects in my Shenzhen have seen. "Gibbons hit the nail on the evaluation of Shenzhen in the phrase.
After nearly 20 years of reform and opening up, Shenzhen is now China's comprehensive economic strength among the strongest one of the cities, and has become the only sea and air ports and taste of the city and won the national "science and technology advanced city", "State Environmental Protection Model City "and a series of honorary titles.
Sky blue, clear water, grass green, bonus, city of the United States, so that visitors first came to Shenzhen will have a pleasant surprise, Shenzhen has become the most talented people at home and abroad prefer to live and work in cities. Development of a number of technology companies from developed countries, scientific and technical personnel satisfaction, said: "Here's a little better than the work environment and conditions for our country worse." Sinovac's a few back from the United States, Dr. Mrs., said: "to live and work here can not see What is different compared with the United States. "
SEB investment funds in New York to build the one in Shenzhen, mainland China's largest software industrial park. "Because there is a market in Shenzhen, have the capital, talent and leadership in the strategic concept of government policies, the Shenzhen with other cities can not match advantage." Industrial park, general manager of Heng Chen 6 explained his choice. Shenzhen has established a relatively perfect market, a senior manager of human resources, science and technology talent market, and motivate talented people to the enthusiasm and creativity of the interest mechanism. Nearly ten thousand people across the country every day, all kinds of talents in the talent market in Shenzhen, the flow of the various high-tech enterprises in Shenzhen to add new blood.
Shenzhen Huawei, ZTE and other high-tech enterprise, every year a graduate of a prestigious university recruitment of 2000 undergraduate and graduate students. They worry about can not find the professionals, but also not worry about the settled indicators. Shenzhen Municipal Government for the way they recruit people the green light.
Shenzhen is a veritable city of immigrants, the immigrant population accounted for more than 90% of the total population. People in different regions, with different cultural backgrounds, different customs come to Shenzhen, Shenzhen has become a breeding to make a variety of new ideas, new concepts, new mechanisms melting pot. Shenzhen people are particularly easy to accept new things, which is high-tech industries in Shenzhen and the rapid rise can be a good cultural environment for the background.
Almost any kind of high-tech product development and production is a complicated system engineering. Shenzhen, just has a good supporting environment for the industry. A computer, for example, supporting more than 1,500 factories around Shenzhen, the production addition to the chip from outside the chassis, boards, connectors, displays to the head, hard disk drives, etc. Almost all of the computer components, the annual capacity to 20 million units supporting around. Shenzhen's industrial supporting advantages, attracting investment from multinational corporations have become an important factor in Shenzhen.
High-tech industry is a high-tech and high added value industry, but more of a high-risk, high investment industries. Shenzhen has a good financing conditions, domestic financial institutions, the balance of RMB deposits and loans, foreign exchange deposits and loans in the balance of large and medium cities in the forefront of the national ranking, capital lending market, insurance market, securities market, foreign exchange market developed. More complete financial instruments, so that Shenzhen's high-tech enterprises to continuously inject funds for technology development.
Shenzhen is also the earliest establishment of an intangible asset assessment offices, and has developed intellectual property protection regulations, high-tech personnel, scientific and technological achievements can be effectively protected and respected. Their worries less. In addition, adjacent to Hong Kong's geographical advantage, so that the Shenzhen with Hong Kong's capital market but also the development of high-tech industries. Shenzhen Great Wall Industry Corporation to develop technology companies are all to varying degrees, from Hong Kong to raise funds for the development of their own businesses.
Hong Kong's international information hub and an international trading center, but also allows access to a variety of scientific and technological research and development, Shenzhen, the required information, materials, and technical information of the original device, greatly reducing the high-tech research and development time, reduce the high-tech products The development and production costs and to ensure that high-tech enterprises in Shenzhen City, the product quickly into the international market through Hong Kong. All this for the development of high-tech industry in Shenzhen provides a unique condition.
The Shenzhen municipal government leaders to form a consensus: all work should be open for the development of high-tech industries.
Shenzhen High-Tech Industry in recent years has been able to sustained and rapid development, and all these years the market as the orientation, the courage to open up, to innovation and has established a relatively complete for the development of high-tech industry, service delivery mechanisms and systems is inseparable from the The. In order to adapt to changes in the development of high-tech industries and market challenges, the Shenzhen municipal government leaders formed a consensus: all work should be open for the development of high-tech industries. In such a consensus, a number of major high-tech projects and industrial development process problems can be quickly put on the municipal government decision-making agenda and resolved.
Shenzhen has established a high-tech enterprise services for the rapid response mechanisms. First, the establishment of an expert to develop forward-looking decision-making advisory system, through the development of planning, investment guidance or support policy, timely guide the industrial development, fostering high-tech industries of the future development of the ability to actively cope with environmental change. July 1997 Asian financial crisis, Shenzhen, immediate response, in October the same year launched the "support of Shenzhen Municipal People's Government on the new materials, bio-engineering industry and industrial development decision" to promote the bio-engineering industry and accelerate the development of new materials industries. Subsequently issued a strongly support the high-tech industries, "22", played a timely and effective prevention and resolving the role of the Asian financial crisis. Second, to reform and simplify the policy and approval system and approve the project was reduced to 723 from 305, which can quickly deal with emerging high-tech enterprise development, the difficulties and problems. Shenzhen has also established a system for the city's leading on-site office, the Government also set up the relevant functional departments of the system, greatly improved efficiency.
Shenzhen R & D institutes and universities for the fewer, the local scientific and technological resources are relatively poor condition, Shenzhen and avoid weaknesses, through bold innovation, initially established in Shenzhen is suitable for the characteristics, market-oriented enterprises as the main body, the Mainland universities and research hospital by relying on foreign research and development institutions to complement the technical development system. Shenzhen from different aspects and levels to promote a market-oriented enterprises as the mainstay of the technology development system building. First, bring into full play the guiding role of the government, and actively nurture scientific and technological resources, scientific and technological resources to the enterprise tilt and vigorously support the independent development of enterprises and the introduction of technology digestion, absorption, innovation, and promote scientific and technological resources and economic resources more closely and more effective combination. The second is to actively encourage enterprises to strengthen cooperation with domestic and foreign universities, research institutes co-operation. Shenzhen enterprises have more than 200 domestic universities, hundreds of scientific and technological research institute has established good cooperative relationship; further enhanced with the mainland in recent years, universities and research institutes of the level of cooperation in research and development activities in the enterprise extends to the mainland in the Mainland to set up research and development institutions, so far has reached dozens of such a body; while, as Konka, Huawei, ZTE and development of scientific and technological strength of a strong group of enterprises, put the research and development institutions based in Silicon Valley to go to the United States. Shenzhen through "by the brain" approach, so that thousands of domestic and foreign science and technology personnel working for the Shenzhen High-Tech industries.
Over the years, Shenzhen to strengthen the dominant position of enterprise technology development, in resource allocation, human resources and other aspects of the introduction of tilt to the enterprise. Currently in Shenzhen 521 research and development institutions, are founded are 477 enterprises, accounting for 91.7%, the city's research and development personnel, 90% concentrated in the enterprise. High-tech enterprises have become the main research and development investment in 1997, the city's research and development funds from the 81.86 percent of enterprises in 1998, invested a total of 129 high-tech enterprise research and development funding for 1.868 billion yuan, accounting for research and development into the city's more than 90%; in 1998, the city's 2093 patent applications, most of which comes from the company, is the nation's first enterprise-patent-based city.
High-tech industry includes a number of categories, Shenzhen, as a new city, can not and need Tandaqiuquan. Shenzhen's choice is: Strengths priority, to support key products, key enterprises and pillar industries. In the development of "Shenzhen High-tech Industrial Development," Ninth Five-Year "plan and 2010 Plan", the clear, "Ninth Five-Year" period focus on the development computer, communications, microelectronics and new components, electromechanical integration, new materials, bio-engineering, Laser major high-tech industry in Shenzhen which is based on self-development to make the right choice. In 1996, Shenzhen has launched the "3 group of high-tech industries strategy" (a number of key industries, a number of large enterprises, a number of brand-name products). According to this strategy will give priority to the development of Shenzhen, an advantage of electronic information, biotechnology and new materials, the three pillar industries, support Huawei, ZTE and other 26 key high-tech enterprises and 19 brand-name high-tech products, and in resource allocation, human resources introduction, policy support, etc. to enter "a group of three" plan of industries, enterprises and products tilt. Since the implementation of the scheme in each of the three science and technology for more than 60% of funds into the appropriate product, business, industry, high-tech industry on the city scale, the level of quantity and quality play a significant role in promoting.
Intellectual property rights of high-tech enterprises, property rights, pluralism, the development of high-tech industry in Shenzhen, and explore the value of intellectual capital to achieve means of a bold and innovative, but also high-tech enterprises in Shenzhen to promote an important aspect of system innovation.
Since 1995, Shenzhen's high-tech enterprises and private technology enterprises vigorously promote technology share system, scientific and technical personnel holding the operating systems, science and technology development incentive system in practice, find out laws of science, technology and economic development, the value of intellectual capital means of realization. At present, the city has dozens of high-tech enterprises through the implementation of employee-owned business and risen to a new stage of development, enterprises will radiate with new vigor; China Section 300 of the employee-owned business enterprises in implementing the emergence of a large number of price of shares of a new technology high-tech enterprise, initially formed in line with the characteristics of high-tech industries to protect intellectual property rights as the core of the distribution system and business management system.
High-tech industry development, Shenzhen has brought a profound and extensive chain reaction
High-tech industries, not only brought rapid economic growth in Shenzhen, more importantly, Shenzhen's social life, culture and education, urban construction, enterprise management, traditional industries, etc., have brought subtle and far-reaching chain reaction.
The emergence and development of high-tech industries, which greatly improved the visibility and influence in Shenzhen. If the pre-1992 is based on reform and opening up, Shenzhen, daring to dare to try and rise to remarkable, then, since then, Shenzhen is a large number of the ringing of hi-tech enterprises and products to get attention. Huawei, Kexing, Seagate, develop science and technology, Coe, BYD, Australia and fertile, ZTE, SEG and their production of SDH transmission systems, magnetic resonance, bio-engineered Hepatitis B vaccine and other products as well as 08 program-controlled switches, 10 program-controlled switches and a number of brand-name products, with a new look in China and the world market, people feel a kind of dynamic of power.
The rise of high-tech enterprises in Shenzhen, resulting in a huge advertising effect, attracting world-renowned high-tech enterprises in Shenzhen have to seek cooperation partners, new home. So far, the Global 500 and large multinationals have already invested to set up 50 high-tech enterprises in Shenzhen. The establishment of these enterprises to drive the export of products of Shenzhen and promote the development of Shenzhen's export-oriented economy, but also to cultivate the talent in Shenzhen, bringing the information to speed up towards the world market of Shenzhen has become an international city process.
The rise and development of high-tech enterprises, but also to speed up high-tech enterprises in Shenzhen and the international famous enterprises at the pace of integration management. Some visited Huawei, Sinovac, develop science and technology companies such as guests, said: "Here's Factory Appearance, management of a modern enterprise with foreign no different."
High-tech industry development, but also significantly improved the quality of Shenzhen people's scientific and technological, and cultural quality, and accelerate the building of a modern international city of Shenzhen pace. In Shenzhen, learn English, learn computer has become common practice, Internet users has exceeded 15 million.
The development of high-tech industries are still an invisible level, brought about the transformation of social values brought about change in general mood of society and promoted the progress of social civilization and the entire city.
"Respect knowledge, respect talent," cried for many years, you had better really is not easy. Shenzhen's experience shows that the development of high-tech industry, formed by the pressure, which can effectively change people's traditional view of knowledge and talent, forcing people to consciously do anything to the pursuit of new knowledge, learn new skills, take the initiative to meet the challenges of the era of knowledge economy. "Jiacaiwanguan better professional skills," has become the consensus of a number of Shenzhen people.
In Shenzhen, almost every there is a demand for technical workers in the industry, there are long-term or short-term courses in the community-oriented recruitment. A large-scale labor skills training center officials said that they opened up to more than 90 training programs, often have more than 30 projects. According to Labor Department statistics, last year, Shenzhen, about 10 million people have participated in work skills training, 20000 people took part in the skills assessment.
Shenzhen develop high-tech industry is starting from the actual conditions of their own strategic choice of the right
We believe that the rise of high-tech industries in Shenzhen and success, at least the following points are worthy of serious learning and thinking:
First, the development of high-tech industries, the key is leadership must be good at size up the situation, seize opportunities, make the right strategic choices, do not lose opportunities for development. Shenzhen's high-tech industry in just 10 years, has become the pillar industry in Shenzhen, a vibrant, the key is the municipal government leadership has correctly estimated the international and domestic economic development prospects and trends, the correct analysis of the Shenzhen Special Economic development, advantages and disadvantages , and has made a timely change in strategic direction for industrial development choices in a planned way contracted a good momentum of development at the time of "three and one compensation" enterprise, focused on financial, human and material development of electronic information, new energy, new materials and bio-technology as the representative of the high-tech industries.
Second, the development of high-tech industry must proceed from their own subjective and objective conditions, seek truth from facts, not to be "catch the trend," create "rush." The Shenzhen municipal government has been able leadership sessions have been explicitly develop high-tech industries as the main direction of task, because the full analysis of the development of high-tech industries in Shenzhen subjective and objective conditions, and the correct use of these conditions. Electronic information, biotechnology and new energy and new materials, although the new trends in world industrial development, has a very attractive prospect, but not where such projects could be more. Shenzhen has been able to develop these industries because it has the basic conditions for the development of high-tech industries.
Third, the Shenzhen Hi-Tech's success proved that Deng Xiaoping's "Science and technology are primary productive forces", "Development is the last word," the thesis of the wise and correct. Shenzhen past 10 years, despite the municipal government leadership for the sessions, but each session of the body of Deng Xiaoping's science and technology are primary productive forces, China's high-tech field to account for such conclusions are firmly place the consensus and unity of action, therefore, the development of high-tech industry goal has always been the same, the determination has not wavered, and the intensity is growing.
Fourth, the development of high-tech industries need to use a market economy means that companies should become the main characters, the Government has not as "mother." The Shenzhen municipal government of the principal leaders have a clear understanding of government functions is to serve. Government and business dealings, to dilute the power of awareness, strengthen the sense of service.
High-tech enterprises in Shenzhen situation, enterprises have become a very real social and economic activities of the center and subject of scientific research in business, human resources concentrated in the business, financing for enterprises, choose products from businesses, develop new markets for companies. Government has gradually come from a planned economy, the protagonist of the evolution of the market and business services in a supporting role. Among high-tech industries in the development of Shenzhen's awareness of the role of government and business are in place. That is why be able to smoke in Shenzhen across the country have affected a large number of high-tech enterprises and products of the major reasons.
The 21st century is the era of knowledge-based economy. Facing the new century full of challenges, Shenzhen City, a series of new initiatives will be launched soon: This year in October, and the MOFTEC Science and Technology, Ministry of Information Industry, Chinese Academy of Sciences jointly organized the first "China International Hi-Tech Fair"; in the domestic and foreign high-tech venture fund set up by two full operation during the year; municipal and national brand-name universities or research institutes focus on several joint research and development agencies are stepping up the building in Shenzhen. We believe that a brand-new high-tech research and development base, production base of high-tech products, high-tech product export base, Hi-Tech Exchange Center will quickly appear in the motherland's southern border!
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What is the Best Games for the PS2?
In your opinion, discounting any of the DDR, FIFA, and Ratchet and Clank games, what is the best game for the Playstation 2 and why? Specifically, I'm looking for an action/adventure game similar to Ratchet and Clank, but any other genre will do. Just a heads up, the games rated "T" or under are the only ones I'll be able to consider right now. Thanks, gamers!
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The Head 2 Head Show: Ratchet and Clank Future: TOD Review
Metric Comb
Metric Comb
CAUSES OF POLLUTION AND ITS TYPES
INTRODUCTION
Pollution, contamination of Earth’s environment with materials that interfere with human health, the quality of life, or the natural functioning of ecosystems (living organisms and their physical surroundings). Although some environmental pollution is a result of natural causes such as volcanic eruptions, most is caused by human activities.
Thermal Inversion Smog surrounds the Angel Monument in Mexico City, Mexico, during a thermal inversion. Air pollution increases dramatically when a mass of cold air is trapped below a mass of warmer air. The absence of air circulation prevents pollution near Earth’s surface from escaping.
There are two main categories of polluting materials, or pollutants. Biodegradable pollutants are materials, such as sewage, that rapidly decompose by natural processes. These pollutants become a problem when added to the environment faster than they can decompose (see Sewage Disposal). Nondegradable pollutants are materials that either do not decompose or decompose slowly in the natural environment. Once contamination occurs, it is difficult or impossible to remove these pollutants from the environment.
Nondegradable compounds such as dichlorodiphenyltrichloroethane (DDT), dioxins, polychlorinated biphenyls (PCBs), and radioactive materials can reach dangerous levels of accumulation as they are passed up the food chain into the bodies of progressively larger animals. For example, molecules of toxic compounds may collect on the surface of aquatic plants without doing much damage to the plants. A small fish that grazes on these plants accumulates a high concentration of the toxin. Larger fish or other carnivores that eat the small fish will accumulate even greater, and possibly life-threatening, concentrations of the compound. This process is known as bioaccumulation.
II IMPACTS OF POLLUTION
Because humans are at the top of the food chain, they are particularly vulnerable to the effects of nondegradable pollutants. This was clearly illustrated in the 1950s and 1960s when residents living near Minamata Bay, Japan, developed nervous disorders, tremors, and paralysis in a mysterious epidemic. More than 400 people died before authorities discovered that a local industry had released mercury into Minamata Bay. This highly toxic element accumulated in the bodies of local fish and eventually in the bodies of people who consumed the fish. More recently research has revealed that many chemical pollutants, such as DDT and PCBs, mimic sex hormones and interfere with the human body’s reproductive and developmental functions. These substances are known as endocrine disrupters.
Pollution also has a dramatic effect on natural resources. Ecosystems such as forests, wetlands, coral reefs, and rivers perform many important services for Earth’s environment. They enhance water and air quality, provide habitat for plants and animals, and provide food and medicines. Any or all of these ecosystem functions may be impaired or destroyed by pollution. Moreover, because of the complex relationships among the many types of organisms and ecosystems, environmental contamination may have far-reaching consequences that are not immediately obvious or that are difficult to predict. For instance, scientists can only speculate on some of the potential impacts of the depletion of the ozone layer, the protective layer in the atmosphere that shields Earth from the Sun’s harmful ultraviolet rays.
Another major effect of pollution is the tremendous cost of pollution cleanup and prevention. The global effort to control emissions of carbon dioxide, a gas produced from the combustion of fossil fuels such as coal or oil, or of other organic materials like wood, is one such example. The cost of maintaining annual national carbon dioxide emissions at 1990 levels is estimated to be 2 percent of the gross domestic product for developed countries. Expenditures to reduce pollution in the United States in 1993 totaled $109 billion: $105.4 billion on reduction, $1.9 billion on regulation, and $1.7 billion on research and development. Twenty-nine percent of the total cost went toward air pollution, 36 percent to water pollution, and 36 percent to solid waste management.
In addition to its effects on the economy, health, and natural resources, pollution has social implications. Research has shown that low-income populations and minorities do not receive the same protection from environmental contamination as do higher-income communities. Toxic waste incinerators, chemical plants, and solid waste dumps are often located in low-income communities because of a lack of organized, informed community involvement in municipal decision-making processes.
III TYPES OF POLLUTION
Pollution exists in many forms and affects many different aspects of Earth’s environment. Point-source pollution comes from specific, localized, and identifiable sources, such as sewage pipelines or industrial smokestacks. Nonpoint-source pollution comes from dispersed or uncontained sources, such as contaminated water runoff from urban areas or automobile emissions.
The effects of these pollutants may be immediate or delayed. Primary effects of pollution occur immediately after contamination occurs, such as the death of marine plants and wildlife after an oil spill at sea. Secondary effects may be delayed or may persist in the environment into the future, perhaps going unnoticed for many years. DDT, a nondegradable compound, seldom poisons birds immediately, but gradually accumulates in their bodies. Birds with high concentrations of this pesticide lay thin-shelled eggs that fail to hatch or produce deformed offspring. These secondary effects, publicized by Rachel Carson in her 1962 book, Silent Spring, threatened the survival of species such as the bald eagle and peregrine falcon, and aroused public concern over the hidden effects of nondegradable chemical compounds.
A Air Pollution
Brown Smog Over Phoenix, Arizona Smog is caused by industrial and automobile pollution. It is compounded by temperature inversions, which cause the air pollution to be kept in a particular area for extended periods. Continued exposure to smog can result in respiratory problems, eye irritation, and even death.
Human contamination of Earth’s atmosphere can take many forms and has existed since humans first began to use fire for agriculture, heating, and cooking. During the Industrial Revolution of the 18th and 19th centuries, however, air pollution became a major problem. As early as 1661 British author and founding member of the British Royal Society John Evelyn reported of London in his treatise Fumifugium, "… the weary Traveller, at many Miles distance, sooner smells, than sees the City to which he repairs. This is that pernicious Smoake which fullyes all her Glory, superinducing a sooty Crust or Furr upon all that it lights.…"
Urban air pollution is commonly known as smog. The dark London smog that Evelyn wrote of is generally a smoky mixture of carbon monoxide and organic compounds from incomplete combustion (burning) of fossil fuels such as coal, and sulfur dioxide from impurities in the fuels. As the smog ages and reacts with oxygen, organic and sulfuric acids condense as droplets, increasing the haze. Smog developed into a major health hazard by the 20th century. In 1948, 19 people died and thousands were sickened by smog in the small U.S. steel-mill town of Donora, Pennsylvania. In 1952, about 4,000 Londoners died of its effects.
A second type of smog, photochemical smog, began reducing air quality over large cities like Los Angeles in the 1930s. This smog is caused by combustion in car, truck, and airplane engines, which produce nitrogen oxides and release hydrocarbons from unburned fuels. Sunlight causes the nitrogen oxides and hydrocarbons to combine and turn oxygen into ozone, a chemical agent that attacks rubber, injures plants, and irritates lungs. The hydrocarbons are oxidized into materials that condense and form a visible, pungent haze.
Eventually most pollutants are washed out of the air by rain, snow, fog, or mist, but only after traveling large distances, sometimes across continents. As pollutants build up in the atmosphere, sulfur and nitrogen oxides are converted into acids that mix with rain. This acid rain falls in lakes and on forests, where it can lead to the death of fish and plants, and damage entire ecosystems. Eventually the contaminated lakes and forests may become lifeless. Regions that are downwind of heavily industrialized areas, such as Europe and the eastern United States and Canada, are the hardest hit by acid rain. Acid rain can also affect human health and man-made objects; it is slowly dissolving historic stone statues and building facades in London, Athens, and Rome.
One of the greatest challenges caused by air pollution is global warming, an increase in Earth’s temperature due to the buildup of certain atmospheric gases such as carbon dioxide. With the heavy use of fossil fuels in the 20th century, atmospheric concentrations of carbon dioxide have risen dramatically. Carbon dioxide and other gases, known as greenhouse gases, reduce the escape of heat from the planet without blocking radiation coming from the Sun. Because of this greenhouse effect, average global temperatures are expected to rise 1.4 to 5.8 Celsius degrees (2.5 to 10.4 Fahrenheit degrees) by the year 2100. Although this trend appears to be a small change, the increase would make the Earth warmer than it has been in the last 125,000 years, possibly changing climate patterns, affecting crop production, disrupting wildlife distributions, and raising the sea level.
Air pollution can also damage the upper atmospheric region known as the stratosphere. Excessive production of chlorine-containing compounds such as chlorofluorocarbons (CFCs) (compounds formerly used in refrigerators, air conditioners, and in the manufacture of polystyrene products) has depleted the stratospheric ozone layer, creating a hole above Antarctica that lasts for several weeks each year. As a result, exposure to the Sun’s harmful rays has damaged aquatic and terrestrial wildlife and threatens human health in high-latitude regions of the northern and southern hemispheres.
B Water Pollution
The demand for fresh water rises continuously as the world’s population grows. From 1940 to 1990 withdrawals of fresh water from rivers, lakes, reservoirs, and other sources increased fourfold. Of the water consumed in the United States in 1995, 39 percent was used for irrigation, 39 percent was used for electric power generation, and 12 percent was used for other utilities; industry and mining used 7 percent, and the rest was used for agricultural livestock and commercial purposes.
Sewage, industrial wastes, and agricultural chemicals such as fertilizers and pesticides are the main causes of water pollution. The U.S. Environmental Protection Agency (EPA) reports that about 37 percent of the country’s lakes and estuaries, and 36 percent of its rivers, are too polluted for basic uses such as fishing or swimming during all or part of the year. In developing nations, more than 95 percent of urban sewage is discharged untreated into rivers and bays, creating a major human health hazard.
Polluted River in the United Kingdom The pollution of rivers and streams with chemical contaminants has become one of the most critical environmental problems of the 20th century. Waterborne chemical pollution entering rivers and streams comes from two major sources: point pollution and nonpoint pollution. Point pollution involves those pollution sources from which distinct chemicals can be identified, such as factories, refineries or outfall pipes. Nonpoint pollution involves pollution from sources that cannot be precisely identified, such as runoff from agricultural or mining operations or seepage from septic tanks or sewage drain fields. It is estimated that each year 10 million people die worldwide from drinking contaminated water.
Water runoff, a nonpoint source of pollution, carries fertilizing chemicals such as phosphates and nitrates from agricultural fields and yards into lakes, streams, and rivers. These combine with the phosphates and nitrates from sewage to speed the growth of algae, a type of plantlike organism. The water body may then become choked with decaying algae, which severely depletes the oxygen supply. This process, called eutrophication, can cause the death of fish and other aquatic life. Agricultural runoff may be to blame for the growth of a toxic form of algae called Pfiesteria piscicida, which was responsible for killing large amounts of fish in bodies of water from the Delaware Bay to the Gulf of Mexico in the late 1990s. Runoff also carries toxic pesticides and urban and industrial wastes into lakes and streams.
Erosion, the wearing away of topsoil by wind and rain, also contributes to water pollution. Soil and silt (a fine sediment) washed from logged hillsides, plowed fields, or construction sites, can clog waterways and kill aquatic vegetation. Even small amounts of silt can eliminate desirable fish species. For example, when logging removes the protective plant cover from hillsides, rain may wash soil and silt into streams, covering the gravel beds that trout or salmon use for spawning.
The marine fisheries supported by ocean ecosystems are an essential source of protein, particularly for people in developing countries. Yet pollution in coastal bays, estuaries, and wetlands threatens fish stocks already depleted by overfishing. In 1989, 260,000 barrels of oil was spilled from the oil tanker Exxon Valdez into Alaska’s Prince William Sound, a pristine and rich fishing ground. In 1999 there were 8,539 reported spills in and around U.S. waters, involving 4.4 billion liters (1.2 billion gallons) of oil.
C Soil Pollution
Pest Control or Pollution? Pest control has become a difficult issue for farmers because of its potential environmental impact. Although the insecticide being sprayed on this potato field will eliminate a generation of Colorado potato beetles, it may also contaminate local food and water sources.
Soil is a mixture of mineral, plant, and animal materials that forms during a long process that may take thousands of years. It is necessary for most plant growth and is essential for all agricultural production. Soil pollution is a buildup of toxic chemical compounds, salts, pathogens (disease-causing organisms), or radioactive materials that can affect plant and animal life.
Unhealthy soil management methods have seriously degraded soil quality, caused soil pollution, and enhanced erosion. Treating the soil with chemical fertilizers, pesticides, and fungicides interferes with the natural processes occurring within the soil and destroys useful organisms such as bacteria, fungi, and other microorganisms. For instance, strawberry farmers in California fumigate the soil with methyl bromide to destroy organisms that may harm young strawberry plants. This process indiscriminately kills even beneficial microorganisms and leaves the soil sterile and dependent upon fertilizer to support plant growth. This results in heavy fertilizer use and increases polluted runoff into lakes and streams.
Improper irrigation practices in areas with poorly drained soil may result in salt deposits that inhibit plant growth and may lead to crop failure. In 2000 bc, the ancient Sumerian cities of the southern Tigris-Euphrates Valley in Mesopotamia depended on thriving agriculture. By 1500 bc, these cities had collapsed largely because of crop failure due to high soil salinity. The same soil pollution problem exists today in the Indus Valley in Pakistan, the Nile Valley in Egypt, and the Imperial Valley in California.
D Solid Waste
Components of Municipal Solid Waste A person living in an industrialized nation produces a great variety of solid waste, often a mix of potentially reusable or recyclable items (such as paper and yard waste) and largely nonrecyclable material (such as food waste and many types of plastic). Of the municipal solid waste (the waste collected from residences and businesses) produced in the United States in 2000, about two-fifths of the paper, metal, and yard waste was recycled, and about one-quarter of the glass was recycled.
Solid wastes are unwanted solid materials such as garbage, paper, plastics and other synthetic materials, metals, and wood. Billions of tons of solid waste are thrown out annually. The United States alone produces about 200 million metric tons of municipal solid waste each year (see Solid Waste Disposal). A typical American generates an average of 2 kg (4 lb) of solid waste each day. Cities in economically developed countries produce far more solid waste per capita than those in developing countries. Moreover, waste from developed countries typically contains a high percentage of synthetic materials that take longer to decompose than the primarily biodegradable waste materials of developing countries.
Overflowing Landfill An average city dweller may produce a ton of refuse in a year, a volume that rapidly overflows local dumps. Cities running out of space for landfill often turn to incinerating their waste or transporting it to other areas, although up to 90 percent of the material might have been recycled.
Areas where wastes are buried, called landfills, are the cheapest and most common disposal method for solid wastes worldwide. But landfills quickly become overfilled and may contaminate air, soil, and water. Incineration, or burning, of waste reduces the volume of solid waste but produces dense ashen wastes (some of which become airborne) that often contain dangerous concentrations of hazardous materials such as heavy metals and toxic compounds. Composting, using natural biological processes to speed the decomposition of organic wastes, is an effective strategy for dealing with organic garbage and produces a material that can be used as a natural fertilizer. Recycling, extracting and reusing certain waste materials, has become an important part of municipal solid waste strategies in developed countries. According to the EPA, more than one-fourth of the municipal solid waste produced in the United States is now recycled or composted. Recycling also plays a significant, informal role in solid waste management for many Asian countries, such as India, where organized waste-pickers comb streets and dumps for items such as plastics, which they use or resell.
Expanding recycling programs worldwide can help reduce solid waste pollution, but the key to solving severe solid waste problems lies in reducing the amount of waste generated. Waste prevention, or source reduction, such as altering the way products are designed or manufactured to make them easier to reuse, reduces the high costs associated with environmental pollution.
E Hazardous Waste
Toxic Waste in Love Canal Residents of the Love Canal area in Niagara Falls were forced to evacuate when hazardous wastes leaking from a former disposal site threatened their health and homes in the late 1970s. One of the most notorious cases of toxic waste leakage, the crisis received attention on both local and national levels. Investigation spurred by public outrage revealed that many waste disposal sites like Love Canal existed nationwide; New York alone had several hundred. Several states passed stricter regulations on industrial waste disposal and allocated billions of dollars for the cleanup of contaminated areas.
Hazardous wastes are solid, liquid, or gas wastes that may be deadly or harmful to people or the environment and tend to be persistent or nondegradable in nature. Such wastes include toxic chemicals and flammable or radioactive substances, including industrial wastes from chemical plants or nuclear reactors, agricultural wastes such as pesticides and fertilizers, medical wastes, and household hazardous wastes such as toxic paints and solvents.
About 400 million metric tons of hazardous wastes are generated each year. The United States alone produces about 250 million metric tons—70 percent from the chemical industry. The use, storage, transportation, and disposal of these substances pose serious environmental and health risks. Even brief exposure to some of these materials can cause cancer, birth defects, nervous system disorders, and death. Large-scale releases of hazardous materials may cause thousands of deaths and contaminate air, water, and soil for many years. The world’s worst nuclear reactor accident took place near Chernobyl’, Ukraine, in 1986 (see Chernobyl’ Accident). The accident killed at least 31 people, forced the evacuation and relocation of more than 200,000 more, and sent a plume of radioactive material into the atmosphere that contaminated areas as far away as Norway and the United Kingdom.
Until the Minamata Bay contamination was discovered in Japan in the 1960s and 1970s, most hazardous wastes were legally dumped in solid waste landfills, buried, or dumped into lakes, rivers, and oceans. Legal regulations now restrict how such materials may be used or disposed, but such laws are difficult to enforce and often contested by industry. It is not uncommon for industrial firms in developed countries to pay poorer countries to accept shipments of solid and hazardous wastes, a practice that has become known as the waste trade. Moreover, cleaning up the careless dumping of the mid-20th century is costing billions of dollars and progressing very slowly, if at all. The United States has an estimated 217,000 hazardous waste dumps that need immediate action. Cleaning them up could take more than 30 years and cost $187 billion.
Hazardous wastes of particular concern are the radioactive wastes from the nuclear power and weapons industries. To date there is no safe method for permanent disposal of old fuel elements from nuclear reactors. Most are kept in storage facilities at the original reactor sites where they were generated. With the end of the Cold War, nuclear warheads that are decommissioned, or no longer in use, also pose storage and disposal problems.
F Noise Pollution
Sound Intensities Sound intensities are measured in decibels (dB). For example, the intensity at the threshold of hearing is 0 dB, the intensity of whispering is typically about 10 dB, and the intensity of rustling leaves reaches almost 20 dB. Sound intensities are arranged on a logarithmic scale, which means that an increase of 10 dB corresponds to an increase in intensity by a factor of 10. Thus, rustling leaves are about 10 times louder than whispering.
Unwanted sound, or noise, such as that produced by airplanes, traffic, or industrial machinery, is considered a form of pollution. Noise pollution is at its worst in densely populated areas. It can cause hearing loss, stress, high blood pressure, sleep loss, distraction, and lost productivity.
Sounds are produced by objects that vibrate at a rate that the ear can detect. This rate is called frequency and is measured in hertz, or vibrations per second. Most humans can hear sounds between 20 and 20,000 hertz, while dogs can hear high-pitched sounds up to 50,000 hertz. While high-frequency sounds tend to be more hazardous and more annoying to hearing than low-frequency sounds, most noise pollution damage is related to the intensity of the sound, or the amount of energy it has. Measured in decibels, noise intensity can range from zero, the quietest sound the human ear can detect, to over 160 decibels. Conversation takes place at around 40 decibels, a subway train is about 80 decibels, and a rock concert is from 80 to 100 decibels. The intensity of a nearby jet taking off is about 110 decibels. The threshold for pain, tissue damage, and potential hearing loss in humans is 120 decibels. Long-lasting, high-intensity sounds are the most damaging to hearing and produce the most stress in humans.
Solutions to noise pollution include adding insulation and sound-proofing to doors, walls, and ceilings; using ear protection, particularly in industrial working areas; planting vegetation to absorb and screen out noise pollution; and zoning urban areas to maintain a separation between residential areas and zones of excessive noise.
About the Author
My name is MIAN AFAQ TARIQ. I am student of 2nd year in MTB Higher Secondry School. I am living in Sadiqabad(PAKISTAN). My contect numbers are 03342527785 and 03023357300.
Are Liberals good people?
Why did you liberals and Obama curtail school vouchers?
Liberals love their billionaires, a very long and sometimes radical list that includes Barack Obama's special favorites Warren Buffet and George Soros. Warren Buffet provides economic advice to his goofy novice, and then has to watch our over-rated chief executive herald that a non-existent metric -the profit-to-earnings ratio -had reached levels that cried out to all those sitting on the sidelines to jump back into the stock market.
Liberal la-la land is such that you can comb this long, paranoid left-wing hit piece without ever coming across an estimate of the amount of taxes Koch Industries pays or the number of employees supported by the conglomerate's manufacturing-heavy portfolio of companies.
Liberals hate billionaires. I'm a conservative for the simple reason that WE love them and I'd like to be one someday.
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Koka Vs Tai
Wheel Socket
Wheel Socket
how to obtain a honda civic wheel lock socket key?
It comes with the set of wheel locks when you buy them. If you lost your original, you'd have to contact the manufacturer to see if you can get a replace.
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Steering Wheel Cover Stuck Socket
Ratcheting Wrench
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How to manually adjust automatic slack adjusters?
I want to adjust my auto slacks on my 06 Pete to make my brakes engage a bit sooner. I have tried releasing the brakes and putting a 7/16ths wrench on the adjusing screw and tighted them tight and backed off about a half a turn, while it made that ratcheting sound, or stripping sound. I'm not sure if that is the correct way to do it. I'm used to manual slacks, so I'm not sure if I'm doing it right or not. Please help.
Hmm... The auto slacks should be keeping the adjustment correctly, your truck is too new to be worrying about that issue. So, here is what I have done. First, drop the trailer, do this while bobtail.
How is your trick driving? 
Find a long driveway, get your truck in reverse and start backing up as fast as you can (in low range!) and jam the brakes hard. Do this a couple of times. You might get a click or two more out of them this way.
If you ever tried to back up your rig in high range, and got it to actually move well, you will know that at idle, in high range, you are moving at almost 20 mph. Be careful with that.
Other than that, I know what you are dealing with, it seems that the trailer is doing all the work. I don't know why some trucks feel this way and some don't. But I would trust the auto slacks to be doing their job right.
The hard and loud ratcheting sound when adjusting these kinds of slacks is normal. Some slacks have a "paw" you can pull out to relieve this, but I think those have pretty much been done away with.
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Craftsman 4-in-One Reverse Ratcheting Wrench
Pliers Tool
Pliers Tool
How do you use a ford fuel line removal tool?
I have a set of plastic tools and a metal tool that looks like pliers but can't get my fuel line off of the filter. Any help will be appreciated.
First figure out what size the line is and find the matching collar.
Snap it over the line near the connection you are trying to break loose, with the smaller end pointing into the fitting.
Then you have to push it into the connection to release the clips holding the line on the filter. You cant see em but they're in there. Wiggle it a bit to get it loose.
On one occasion the tool was too big and we had to cut a small piece of it off to make it work. But only a small piece, maybe a 16th.
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Gerber Flik Multi-Tool by US Cavalry