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	HF Communication Overview (Site not responding. Last check: 2007-10-21)
		HF is a widely used band for long distance communications ever since the discovery of radio by Marconi and Popov.
		HF communications are growing at the moment despite the advent and all-around implementation of cellular and satellite communication systems.
		HF is the only way of achieving global communication coverage without using expensive terrestrial and satellite infrastructure.
	www.spiritcorp.com /hf_overview.html (1245 words)

	Hafnium - Wikipedia, the free encyclopedia
		Hafnium is a chemical element in the periodic table that has the symbol Hf and atomic number 72.
		A lustrous, silvery gray tetravalent transition metal, hafnium resembles zirconium chemically and is found in zirconium minerals.
		Hafnium is found combined in natural zirconium compounds but does not exist as a free element in nature.
	en.wikipedia.org /wiki/Hafnium (659 words)

	Firexx HF-A
		Firexx HF-A oil-in-water emulsion provides outstanding fire resistance and excellent emulsion stability for low-pressure applications where anti-wear properties are not critical.
		Firexx HF-A is a fire-resistant hydraulic oil concentrate that produces a milky emulsion when mixed at a 95/5 water/oil ratio.
		Firexx HF-A is incompatible with certain types of cork, paper, leather, asbestos and synthetic fibers that soften and swell in the presence of water.
	www.exxon.com /USA-English/Lubes/PDS/NAUSENINDEXFirexx_HF-A.asp (816 words)

	Working with HF
		HF is dangerous, and you should read up on it yourself, not just go on what some fool graduate student has to say.
		The salient feature of HF burns is the delayed onset of discomfit and the development of a characteristic white lesion that is excruciatingly painful.
		Treatment of HF burns involves copious sluicing with water for at least 15 min followed by (a) immersion in (or application of wet packs of) cold MgSO4, or (b) subcutaneous injection of a 10% solution of calcium gluconate (which gives rapid relief from pain), or (c) surgical excision of the burn lesion.
	darkwing.uoregon.edu /~hutchlab/semilab/hfsafety.htm (964 words)

	Ebola Hemorrhagic Fever \| CDC Special Pathogens Branch
		Ebola hemorrhagic fever (Ebola HF) is a severe, often-fatal disease in humans and nonhuman primates (monkeys, gorillas, and chimpanzees) that has appeared sporadically since its initial recognition in 1976.
		Treating patients with Ebola HF during outbreak of the disease in Kikwit, Democratic Republic of the Congo, in 1995.
		Diagnosing Ebola HF in an individual who has been infected only a few days is difficult because early symptoms, such as red eyes and a skin rash, are nonspecific to the virus and are seen in other patients with diseases that occur much more frequently.
	www.cdc.gov /ncidod/dvrd/spb/mnpages/dispages/ebola.htm (1350 words)

	HF Pure Water (Site not responding. Last check: 2007-10-21)
		HF Pure Water Vacuum Distillation systems are the result of many years of extensive research and experience and are considered one of the most technologically advanced units on the market today.
		HF Pure Water is committed to providing public and private sector clients with design excellence, cost effectiveness, and timely project delivery.
		HF Pure Water is committed to providing you with legendary customer service and to making your experience with our company enjoyable, easy, and convenient.
	www.environmental-expert.com /technology/hfgroup/hfgroup.htm (2994 words)

	HF_based_SOP
		HF solutions, as well as any corrosive or hazardous substances, can only be used in LAMP during operational hours (9 am to 6 pm, Monday to Friday) and requires at all time the presence of a second knowledgeable user (buddy system).
		Whenever handling HF, all containers used during the experiment must be very clearly labeled and a warning sign, visible by any user working under the flow hood, must be posted at all time to indicate that the solutions contains HF.
		As stipulated earlier HF solutions are considered extremely hazardous because their effects are not immediate and the fluoride ion will penetrate the skin causing destruction of the deep tissue layers and even bone.
	www.mne.umd.edu /LAMP/Sop/HF_SOP.htm (1083 words)

	IB >> FCC HF Broadcasting
		High Frequency Broadcasting (HF) also known as Shortwave Broadcasting is a radio service licensed by the FCC to operate between 5,950 kHz and 26,100 kHz.
		Unlike other broadcasting services, HF broadcasters are authorized frequencies on a seasonal basis, currently two seasons exist, a Summer season and a Winter season.
		Due to the nature of the shortwave propagation, these broadcast signals propagate very long distances and are subject to interference from HF stations around the world, as a result, the HF frequency bands are extremely congested (particularly the lower frequency ranges).
	ftp.fcc.gov /ib/sand/neg/hf_web (216 words)

	The HF Bar Ranch
		The HF Bar Ranch, situated in a pristine valley on 9,000 acres bordering the Bighorn National Forest, is the second oldest dude ranch in America.
		For decades, families have regarded the HF Bar Ranch as a place on which they can rely for the atmosphere they want on a vacation.
		In this world of rapid change, the HF Bar Ranch offers you a place you can come back to year after year, a place that always has what you like, a place that stays the same.
	www.hfbar.com (205 words)

	HF Customer Roundtable - Honeywell Hydrofluoric Acid
		The HF Roundtable, an event we hold biannually, is a comprehensive HF technical symposium. Honeywell's 2005 HF Roundtable will be held on June 20-23, 2005 at the Kingsmill Resort in Williamsburg, Virginia.
		Our Panel of experts from the HF Industry was able to address all the questions sent in prior to the meeting. Overall, this was a very successful event.
		We are very excited about the upcoming 2005 HF Roundtable and look forward to sharing the latest and greatest in HF technology and trends. We invite you to submit agenda topics and encourage those who would like to present information on a particular topic to let us know.
	www.honeywell.com /sites/sm/chemicals/hfacid/Cust_Round_Table.htm (227 words)

	HF Mobile Radio Page - W6TEE
		HF mobile first became popular in the 40s on 10 meters.
		HF mobile activity was reduced by repeaters and small cars.
		New smaller HF rigs are allowing a return to HF mobile operating.
	home.pacbell.net /lcobb/hfmobile.htm (278 words)

	HF and Lower Frequency Radiation - Conclusions and Additional Resources (Site not responding. Last check: 2007-10-21)
		The primary focus was on the HF band, because it is here that long range communications are most feasible.
		Be able to state the advantages and disadvantages of various HF and lower frequencies compared to each other and higher frequencies.
		Be able to explain to radio operators and other technicians what controls HF propagation under normal conditions.
	www.weather.nps.navy.mil /~psguest/EMEO_online/module3/module_3_4.html (457 words)

	Honeywell Hydrofluoric Acid
		The 2005 Honeywell HF Roundtable will be held at the Kingsmill Resort in Williamsburg, Virginia on June 20 through June 23, 2005.
		(Aqueous HF, 49% HF) 49% HF (Aqueous HF) a non-fuming strength of hydrofluoric acid, is used in a variety...
		Honeywell is the world's largest producer of Hydrofluoric Acid (HF) and the leader in safe and reliable HF transportation.
	www.honeywell.com /sites/sm/chemicals/hfacid (139 words)

	USCG HF Voice
		U.S. Coast Guard HF voice broadcasts are performed in the upper sideband mode using a synthesized voice known as "Perfect Paul".
		HF voice broadcasts may be terminated if longer than the available broadcast period.
		HF voice broadcasts use synthesized voice (Perfect Paul).
	www.nws.noaa.gov /om/marine/hfvoice.htm (559 words)

	HF Station Database (Site not responding. Last check: 2007-10-21)
		HF Code Practice Transmissions Contains information about W1AW code practice transmissions that sometimes can be received here.
		HF Time and Frequency Standard Stations These stations are widely used by Radio Amateurs and others to quickly check shortwave radio propagation conditions.
		HF Amateur Radio Nets Lists only a few of the many ham radio nets that can be received here.
	www.smeter.net /stations/hf-stations.php (97 words)

	Hf on Encyclopedia.com (Site not responding. Last check: 2007-10-21)
		Comparing HF and UHF RFID technologies: the stakes couldn't be higher for consumers, pharmaceutical manufacturers, distributors and retailers, as up to seven percent of all drugs in the international supply chain may...
		HF Bancorp Inc. Announces Quarterly And Annual Results.
		HF Financial Corp. Announces a Quarterly Diluted Earnings Per Share Increase of 32.4% and Declares Quarterly Cash Dividend; -- HF Financial Corp. (the "Company") (Nasdaq: HFFC), Sioux Falls, SD, reported diluted...
	www.encyclopedia.com /html/H/Hf.asp (300 words)

	ROHACELL HF (Site not responding. Last check: 2007-10-21)
		Rohacell® HF (= High Frequency) is a closed-cell rigid foam plastic based on PMI (polymethacrylimide) which does not contain any CFCs.
		The fields of application for ROHACELL® HF are antennas, radomes and X-ray tables.
		HF is machined by means of high-speed tools designed for wood or plastics, without the use of lubricants.
	www.nfgsales.com /rohacell_HF.htm (210 words)

	Brooke's HF Propagation & RCS-5A Chirp Sounder page
		There is no requirement to aim the HF antenna like you need to do for a satellite and so works while a vehicle is in motion.
		The NCDXF maintains a system of HF beacons that work on a set of single frequencies and are time multiplexed.
		Using an amateur type HF receiver tuned to a fixed frequency and a dedicated chirp demodulator that time stamps each chirp using GPS to get microsecond accuracy.
	www.pacificsites.com /~brooke/HF_Prop.html (1568 words)

	Welcome to H.F. Radio On Board (Site not responding. Last check: 2007-10-21)
		The Marine Single Sideband Radio, commonly referred to as the SSB is the VHF's big brother and has a range, depending up on frequency that extends to 3,000 miles and beyond.
		HF is working superbly; radar, chart plotter a godsend.
		Who We Work With: H.F. Radio On Board recommends Waypoint as a source for computers, GPS receivers, marine software, nautical books and publications, charts and cruising guides and other marine items.
	www.hfradio.com (722 words)

	Hydrofluoric Acid Sensors
		Fast, reliable and specific detection of hydrofluoric acid (HF) is indispensable in many manufacturing environments.
		The model HFT and HFM sensors detect HF by its etching action on an anodic Silicon dioxid film covering the sensor electrode.
		These electrochemical sensors are therefore specific to the presence of HF in the solution.
	www.hf-acid-sensors.de (209 words)

	HF Propagation Models
		Requests to modify the ITS HF Propagation Models should be made to: Greg Hand. Email: gh@its.bldrdoc.gov Phone: (303) 497-3375.
		He will still be involved in this HF software, but just do not expect instantaneous email contact as he might be having fun somewhere.
		These antennas are useful for HF Broadcasters and their coordination meetings.
	elbert.its.bldrdoc.gov /hf.html (497 words)

	HF Reunion
		On Saturday we made the mad dash to Cedar point at 9:30 am where we were to meet HF_Blade and HF_Flak at the gate and noon.
		We, and when I say we I mean all the HF's that went, HF_RB, HF_Terry, HF_Scott B didn't go, Sitting motion sickness or some cock and bull story, went on a few rides then we made our way to the gate at the above time to meet HF_Blade and HF_Flak.
		The word family in HF carries on whether on the zone or in person.
	hf_fighters.tripod.com /Reunion.htm (942 words)

	Phusion HF Buffer Pack, PCR Buffers, New England Biolabs
		Therefore, the HF Buffer should be used as a default for high fidelity amplification.
		Use of the GC Buffer is recommended for those instances where amplification with HF Buffer has failed.
		They can also be used in microarray applications, as detergents can cause foaming when PCR products are spotted on microarray slides.
	www.neb.com /nebecomm/products/productF-518.asp (544 words)

	HF (high frequency) and VHF Radiowave Propagation Center: Live propagation and space weather data and forecasts
		HF (high frequency) and VHF Radiowave Propagation Center: Live propagation and space weather data and forecasts
		His working life encompassed microwave radar and telecommunications from HF to audio, while his amateur radio experience is from the early 1950s to the present, licensed at various times as G4ARR, WA2ZVX, WA3ZKZ and VP8CMY.
		In fact, it's the most comprehensive radio hobby magazine in the U.S. Packed with up-to-date information concisely written by the top writers in the field, Monitoring Times® is your foremost guide to profiles of broadcasting and communications installations; home projects; and tips on monitoring everything from air, sea, and space to distant ports of call.
	hfradio.org /propagation.html (1247 words)

	NWS Radiofax
		Radiofax, also known as HF FAX, radiofacsimile or weatherfax, is a means of broadcasting graphic weather maps and other graphic images via HF radio.
		HF radiofax is also known as WEFAX, although this term is generally used to refer to the reception of weather charts and imagery via satellite.
		Although available, Internet access is not presently technically feasible for most vessels and broadcast of graphic marine forecasts via HF radiofax remains among the most valued of NWS marine services.
	www.nws.noaa.gov /om/marine/radiofax.htm (1575 words)

	Brunei Bay Radio providing low cost HF SSB radio communications in SE Asia
		Marine HF radio users include racing and cruising yachts, motor yachts, sports fishing boats, dive boats, surf and dive charter vessels and charter power or sail yachts.
		Passage logging and position reporting services are provided for organised events, such as yacht races and regattas, sports fishing competitions and remote dive or land based expeditions.
		This is assigned by the radio communications authority in the vessel's country of registration.
	bruneibay.net /bbradio (461 words)

	HFPack. HF Portable. HF pack (Site not responding. Last check: 2007-10-21)
		HFpack's egroup is a spam-free moderated discussion group, primarily utilized by amateur radio operators interested in HF portable communications and equipment.
		HFpack is dedicated to furthering the state of the art for HF Portable.
		Ionosondes bounce HF radio signals off the ionosphere to measure the height of the reflective zones and signal strength vs frequency.
	www.hfpack.com (1046 words)

	IARU - HF (Site not responding. Last check: 2007-10-21)
		The HF Managers Handbook is primarily intend as a guide for HF Managers, and should also be of help to any societies wishing to set up their own HF Committee.
		Therefore some historical items are contained in this book for the benefit of new HF Committee representatives, who may not always know about things that have gone in the past.
		It is also possible to have copies of past HF Newsletters, who are available from the Region 1 Office on request.
	www.iaru-r1.org /hf.htm (374 words)

	: www.raynet-hf.net
		However, experience has shown that HF radio has a role to play in circumstances where usage of VHF/UHF would not be feasible or our expertise in that area was requested.
		A fresh look at HF is intended to enhance our Emergency Communications abilities; don't think that there is any intention to replace existing VHF/UHF working - on the contrary - it is to complement it or 'add an extra weapon to our armoury', if you like.
		If you are interested in any aspect of the RAYNET HF Team, require more information, or have any constructive comments, please leave a message in our guestbook.
	www.raynet-hf.net (345 words)

	HF Receiving Loop Antenna (Site not responding. Last check: 2007-10-21)
		Receiving HF signals at my location is a compromise situation due to the antennas I use and the high noise environment in the city.
		This little antenna has excellent directivity - I have enjoyed orienting the loop for peak signal strength on both DX as well as US stations and for the majority of cases I can determine the Great Circle Bearing within 5 degrees of the actual bearing.
		If you enjoy RDF (Radio Direction Finding) pursuits on HF, this is a neat way to do it.
	pages.zdnet.com /radio_k7zb/id14.html (1067 words)

	HFIA
		A series of Nordic conferences on HF communications has been held every third year since 1986 on the island of Fårö in the middle of the Baltic Sea.
		The HF Communiqué is the periodic news letter of the HFIA.
		Please if you are an HFIA member, HF type and you know of changes that reflect on who, whom, or whatever, please contact the Chairman of the HFIA or the
	www.hfindustry.com (1188 words)

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