Externet

Here is an infrared directional parabolic antenna; widely available at department and hardware stores : ----> http://images.palcdn.com/hlr-system/WebPhotos/84/843/8432/8432593.jpg?_v=5a94e708-b43a-47fc-b9d2-56110847a5a6

Well, even better. Another reason to the list.

Eight years later, after a loong wait for your dozens of opinions in ten pages; releasing mine : ----> Spiders <---- With minuscule brains, -They wait for desired (and correct) wind direction and strenght to glide tethered to the 'planned' target in order to anchor a web. -Admirable uniformity to create the web. -Spacing between turns follows an incremental proportion. Weaker points near center are reinforced closely. Some engineering there. -Follow an efficient spiral path for construction. -Choose sturdier over weak anchoring. -Position themselves to sense and determine direction of prey caught on the web. -Discern debris from prey vibrations. -Hide protected from bad weather. -Decide when to cleanup their webs from debris. -Clean the debris by untangling it and dropping to the correct downwind side. -Know a vertical web is better than in a horizontal plane. -Select higher 'traffic' locations, as near artificial lamps. -Select rain sheltered locations when available. -Know how to untangle the web with no damage to it. -Properly reconstruct damaged sections. -They double threads at weak sections. -Evaluate attacking or not by sizing the prey and danger. -Know where in the prey to direct the killing bite. -The behavior when killing another (even bigger) spider is full of amazing strategy. A great show of technique to watch. -Since very young, fully capable of survival and to do their 'engineering work'. -Preserve captured insects, wrapped for later 'bad days' -Show patience over hunger. -They wait for a calm moment to strike a captive. -Perform evasive actions. -They show precaution by every few steps anchoring a 'lifeline' in the event of falling/losing grip. -Build their nests nearby considering positioning, sometimes bending leaves as housing. -Guard their nests and young. -I believe they have some sort of signalling/communication. -And more I do not remember to type right now. But, do not perform team work. What I have not observed is if the have a 'tool' to cut/dispose a string, or if they ever do such action. In general, cannot comprehend how much of it is from instinct, learned skills, or "intelligence"; but it surely is an amazing animal. Its filament production organ is not related to 'intelligence' , but what a great material !

Pouring some ClNa on ice is a practice to melt ice. As is done on pavements. Pouring some ClNa on ice is a practice to lower the ice temperature and prevents melting of ice. As done on keeping fish mixed with ice for its transportation or storage. Well, it is one, the other or... both. Promotes melting; prevents melting ? Explain please ?

Found an older post, may be of interest for the original poster. ----> http://www.scienceforums.net/topic/29638-how-to-make-a-self-inflating-balloon/

If the blood donor is a patient that somehow survived ebola; would it transfer effective 'experienced' antibodies to a healthy recipient, sort of a vaccine ?

I know nearly nothing important about the subject. Fever is a body defensive mechanism to kill germs AFAIK. Heard something around 43C = 110F being fatal. ¿? Read Saharan nomads live in it, daily. Heard the brain is damaged first. Which are the next organs in danger by overtemperature ? IF other organs can cope with -say 50C = 122F for at least some hours, like my attic in July. If the brain was somehow kept cool by potent external neck-carothids and head cooling apparatus, say at ~35C = 95F and the rest of body in a 50C = 122F chamber... Could that kill ebola virus ? Or, reverse. Cooling the body artificially to a survivable near-limit ?

Me being ignorant in the subject, I wonder if the infected body fluids from ebola patients anywhere including US hospitals that get into the sewage can survive there, taking in account the great difficulty to kill the ebola virus. Patients have to defecate and urinate too. Does it end in public sewer ?

Thanks again, studiot. Solving with metres, the voltage that the strait of Gibraltar tidal current could produce on MHD with the earth magnetic field, is 24 millivolts. A surprisingly low figure. Solving with centimetres, is 240 Volts. Magnetic field N <---> S; current E <---> W

Found. It is supposed to be 12 minutes time.

Hi. In the formula E = V B L for the "Conclusions" paragraph at near bottom of page ----> http://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.abstractDetail/abstract/8630/report/F B being 0.00004 Tesla, V being 2 metres/second, L being 300 metres; Should the V,L units be in centimetres or metres for E to be Volts ? [ Did not copy and paste the pertinent portion here because figure 4 shows 'Copyright' ]

Thanks. Yes, horizontal currents in bodies of water created by changes in vertical levels from tides. The massive insertion of turbines to extract energy from tidal currents cause slowing of currents and some corresponding warming of churning waters. Natural obstacles as straits of Gibraltar, and north of Labrador, Denmark, Malacca and countless others have been doing it for millions of years just as if those massive bottlenecks were turbines extracting (electric) energy. ----> Has that energy dissipation been altering the earth-moon rotation and orbits since day one ? I can see the planet with no shortage of energy in the future. Brutal engineering and costs needed to implement such extraction from tidal currents. Am sure some said Suez and Panamá canals were impossible to build also. ================================= Edited. added: Found "Tidal friction causes Earth days to lengthen 1.6 milliseconds/century. " =================================

Passing a conductive fluid as seawater trough a permanent magnet pipe; will it create electrical current ? How to 'collect' that current ?

There has to be many applications for such inflating balloon. I was tinkering a year ago with such baking soda and vinegar to propel a submarine glider. Just do your thing and put it the market ! Invite us a hamburger when wealthy.

Hello. Tidal currents are a brutally high potential suppliers of all the energy the planet may need, and much more. The ´generator´ is the orbiting moon. Assumming (or dreaming) that all the tidal currents in all the planet seas and waters were tapped to supply the world energy needs and more; would that affect the rotation or orbits of earth-moon ? -Yes, a lunatic question-

If the moon is observed at 30 degrees azimuth seen from -say meridian 77 in New York- Is the moon said to be also at 30 degrees azimuth at meridian 77 for an observer in Lima ? Sorry, not a subject of my expertise.

Hi all. What is the delay from a lunar noon (moon at 90 degrees azimuth observed from earth) at a given meridian to the high tide maximum at that meridian ? Is that delay constant for the same location ? Does that delay changes for different locations ? I suppose yes, due to geographic and topographic sorroundings of coastal shores. Does that delay changes by the elevation of the moon when at lunar noon ? [ *Perhaps zenith is the wrong term as would imply 90 degrees elevation. I mean lunar noon when moon azimuth is coincidental with the meridian of observer. Should I say 90 degrees azimuth instead of zenith ? ]

Thanks. Am condensing the text above to the pertinent as follows : "...Foaming in a transmission occurs when rotating gears splash in the overfilled fluid reservoir..." IF this condensing or rewording does not match your intended phrasing, ignore this post, as I do not want to distort your opinion. ----> There are no rotating gears splashing fluid in an overfilled fluid reservoir in a transmission. Gears are two 'levels' above the fluid and valve body, in another chamber.

Thanks. Yes, 'heard' that one too. But as far as I know, the transmission pump has a pressure regulator built-in, that would not allow that to happen ¿?.

Even if computers were high power users, there would be no ban against them, because the enforcerers/entities/policing would come to a halt without them. But would be very interesting to have an entire continent doing daily life and business without computers. I think I would enjoy it.

Would be great to find a member that has professionally studied about these devices and can clear myths found everywhere including the web. Or that is not a myth. Excessive fluid level in an automatic transmission is warned against. (Oil in engines too, but I understand why in them) What parts become damaged ? (if damage is the concern) Is there symptoms of overfilled ? If you share the commonly found opinion that overfilling will foam the fluid; where in the transmission, how, why is foaming supposed to form ? Wouldn't 'foaming' happen if there is too little fluid instead, and the pump is sucking some air from the pan ? -That would be the opposite of overfilling- Educate me please ?

That ! explains it. Thanks again, Marc. In my words, the 'any' potential generation from the two metals junction is also short-circuited by their bonding; showing zero. So, is there a 'permanent' electrical current in the bond ?

Thanks. See no relation to the bloom box nor circuit breakers. A termocouple bond creeps closer, but not as in the Seebeck effect, but the Seebeck coefficient. Probing a zinc/copper intimate bond does not register any potential, not even a millivolt.

Thanks. My poorly composed original post should had beed focused in the area of interest, the copper cladding of zinc as blank rounds metal source. The process of minting is explained in several sites. Do you know details about that process ? Edited, added: Found something at many sites, by searching with proper terminology ----> http://smt-holland.com/#/explosive_cladding

Hi. Over twenty years ago, I was told that the cent coins (pennies) were made from zinc sheets with bonded copper foils above and under by a very high pressure explosive method, and then the blank rounds cut from the resulting layered sheet, to be later stamped at a mint. Is that true ?