Two Uhf

How does science affect our daily lives? (Especially UHF (ultra high frequency waves)… ???)?

a long answer please? not just a sentence or two…
about 50 -150 is fine =)
thanks!

For a large part of recorded history, science had little bearing on people’s everyday lives. Scientific knowledge was gathered for its own sake, and it had few practical applications. However, with the dawn of the Industrial Revolution in the 18th century, this rapidly changed. Today, science has a profound effect on the way we live, largely through technology—the use of scientific knowledge for practical purposes.

Some forms of technology have become so well established that it is easy to forget the great scientific achievements that they represent. The refrigerator, for example, owes its existence to a discovery that liquids take in energy when they evaporate, a phenomenon known as latent heat. The principle of latent heat was first exploited in a practical way in 1876, and the refrigerator has played a major role in maintaining public health ever since (see Refrigeration). The first automobile, dating from the 1880s, made use of many advances in physics and engineering, including reliable ways of generating high-voltage sparks, while the first computers emerged in the 1940s from simultaneous advances in electronics and mathematics.

Other fields of science also play an important role in the things we use or consume every day. Research in food technology has created new ways of preserving and flavoring what we eat (see Food Processing and Preservation). Research in industrial chemistry has created a vast range of plastics and other synthetic materials, which have thousands of uses in the home and in industry. Synthetic materials are easily formed into complex shapes and can be used to make machine, electrical, and automotive parts, scientific and industrial instruments, decorative objects, containers, and many other items.

Alongside these achievements, science has also brought about technology that helps save human life. The kidney dialysis machine enables many people to survive kidney diseases that would once have proved fatal, and artificial valves allow sufferers of coronary heart disease to return to active living. Biochemical research is responsible for the antibiotics and vaccinations that protect us from infectious diseases, and for a wide range of other drugs used to combat specific health problems. As a result, the majority of people on the planet now live longer and healthier lives than ever before.

However, scientific discoveries can also have a negative impact in human affairs. Over the last hundred years, some of the technological advances that make life easier or more enjoyable have proved to have unwanted and often unexpected long-term effects. Industrial and agricultural chemicals pollute the global environment, even in places as remote as Antarctica, and city air is contaminated by toxic gases from vehicle exhausts (see Pollution). The increasing pace of innovation means that products become rapidly obsolete, adding to a rising tide of waste (see Solid Waste Disposal). Most significantly of all, the burning of fossil fuels such as coal, oil, and natural gas releases into the atmosphere carbon dioxide and other substances known as greenhouse gases. These gases have altered the composition of the entire atmosphere, producing global warming and the prospect of major climate change in years to come.

Science has also been used to develop technology that raises complex ethical questions. This is particularly true in the fields of biology and medicine (see Medical Ethics). Research involving genetic engineering, cloning, and in vitro fertilization gives scientists the unprecedented power to bring about new life, or to devise new forms of living things. At the other extreme, science can also generate technology that is deliberately designed to harm or to kill. The fruits of this research include chemical and biological warfare, and also nuclear weapons, by far the most destructive weapons that the world has ever known.

MOTOROLA BUSINESS 5-MILE 1-CHANNEL UHF ON-SITE TWO-WAY RADIO ENHANCED SECURITY $160.99

Four UHF 400-480MHz CB AU 40CH 5W Handheld Two Way Radios Free 4 Earpieces 2584 $290.87

Four UHF 400-480MHz CB AU 40CH 5W Handheld Two Way Radios Free 4 Earpieces 2859 $290.87

One FDC AU 40 channel CB UHF Handheld Two Way Radio+free Earpiece 1232583 $92.65

One FDC AU 40 channel CB UHF Handheld Two Way Radio+free Earpiece 1232582 $92.65

Pair AU 40 channel 400-480MHz CB UHF Handheld Two Way Radio+Free 2 Earpiece 2581 $166.98

Pair AU 40 channel 400-480MHz CB UHF Handheld Two Way Radio+Free 2 Earpiece 2588 $166.98

Motorola GP68 Two-Way Radio UHF 430~470MHz+ Accessories $49.00

Motorola GP2000 UHF Handheld Two-Way Radio+ Accessories $95.00

Wouxun KG-699E UHF 400-470mhz Two-way Radio + Speaker Mic 41-10K $110.00

Wouxun KG-699E UHF 400-470mhz Two-way Radio + ComPort Prog Cable 6-004A $108.00

Wouxun KG-699E UHF 400-470mhz Two-way Radio + Earpiece $105.00

Wouxun KG-699E UHF 400-470mhz Two-way Radio + Speaker Mic 41-27K $128.00

Wouxun KG-699E UHF 400-470mhz Two-way Radio + USB Cable 6-034 $108.00

MOTOROLA RADIUS CP185 UHF 16CH TWO WAY RADIO CP 185 $192.00

Motorola PM400 UHF Mobile Two-Way Radio $160.00

Two way Radio CP 200 UHF 438-470MHz 4-channel 4 Watt $299.00

MOTOROLA UHF XTN TWO WAY RADIOS $600.00

VERTEX/STANDARD VX4600 UHF 512CH 45WATT TWO WAY RADIO $510.00

2PCS Handle Walkie Talkie UHF 5W 16CH Portable Two-Way Radio H777 from US $62.01

Motorola CLS1110 5-Mile 1-Ch UHF Two-Way Radio $69.00

ICOM IC-F4161T 46 DTC EMDC UHF 512 CH 5W TWO WAY RADIO $434.85

Motorola Radius P 1225 16 Channel Portable Two-Way Radio vhf uhf? $5.00

ICOM IC-F4161S 56 DTC EMDC UHF 512 CH 5W TWO WAY RADIO $418.60

MOTOROLA M1225-LS UHF 450-474MHz 25-40Watts LTR MOBILE TWO WAY RADIO $60.00

WOUXUN KG-833 UHF handheld two way FM radio+S2B adaptor $67.50

WOUXUN KG-816 UHF Two-way radio CTCSS DCS Scan x 1 set $79.00

Motorola Two-Way Radio GP380 UHF 403-470MHz+Accessories $148.00

Memorex Two Way Splitter UHF VHF Cable FM $10.00

Dual Band VHF UHF 5W TGUV2 Two Way Radio DCS CTCSS FM CA1 $80.39

Male UHF Connector Flexible Antenna for Two Way Radio $7.16

MARINER 3500 VHF-UHF ??? MARINE TWO-WAY RADIO “L@@K” $9.99

2 pcs Dual Band VHF UHF 2W UV3R Two Way Radio DCS CTCSS CA1 $92.44

4 pcs Dual Band KG-UVD1 VHF/UHF Handheld Two Way Radio CA1 $389.87

Dual Band VHF UHF 2W UV3R Two Way Radio DCS CTCSS FM CA1 $48.23

PX777 UHF 5W Two Way Handheld Walkie Talkie Radio CA1 $58.08

Motorola GP68 Two-Way Radio UHF 403~433MHz+ Accessories $49.00

Rigid paper UHF Label (Read/Write Gen 2 UHF RFID Tag)

DAILY RFID has released rigid paper UHF Label, each including a small IC chip and antenna, designed as a durable read/write Gen 2 UHF RFID tag even under harsh environment.

The UHF label is rewriteable to allow compliance with EPC Gen 2(ISO18000-6C) standard and ideal for supply chain management, such as baggage handling, in archiving including libraries, document tracking, etc. The chip comes with a unique ID code and the memory capacity of the uhf rfid tag is available in 1K/4K. Besides, it is fully supported on logo printing, number printing, barcode printing.

The rigid Gen 2 UHF RFID tag is engineered to last the the durability even under harsh environment. The use of high-quality waterproof paper and 3M adhesive Glue in the UHF label ensures readability as well as protection against chemicals and abrasion, while providing excellent grip to plastic and uneven surfaces.

This UHF RFID label has a long-range readability of up to 5m-6m and can be rewritten over 100,000 times. DAILY hopes to provide attractive, durable tags to realize a high return on customers’ investment. And DAILY will test inlay before inserting them into uhf label, and test the finished uhf rfid tag again, discarding those that are “bad” or exhibit low power at each testing station.

Please visit http://www.rfid-in-china.com/products_686_1.html for more infomation about RFID label.

About DAILY RFID CO.,LIMITED

DAILY RFID CO.,LIMITED( http://www.rfid-in-china.com ) , which belongs to PAN Group Co., ltd, is the leading company focusing on the research and development of EPC & RFID technology in China.

DAILY RFID specialize in producing arguably the world’s most extensive line of RFID Tag,RFID Label(including the hf and uhf label),Smart Card and RFID Reader, which are suitable for any vertical markets, and have obtained the National Integrated Circuit Card Register Certificate, IC Card Manufacture License and ISO9001 Quality Management System Certification. Also, we own a factory covering an area of 26,000 square meters.

About the Author

technical manager
DAILY RFID Co.,Ltd, which belongs to PAN Group Co., ltd, is the leading company focusing on research and development of EPC & RFID technology in China. We specialize in manufacturing RFID Tag,RFID Label,Smart Card and RFID Reader.