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Frequently Asked Questions

Why do I get errors about unknown algorithms?

OpenSSL: Support, Frequently Asked Questions
The cause is forgetting to load OpenSSL's table of algorithms with OpenSSL_add_all_algorithms(). See the manual page for more information. This can cause several problems such as being unable to read in an encrypted PEM file, unable to decrypt a PKCS#12 file or signature failure when verifying certificates.
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What about algorithms?

Curriculum and Instruction Department - Denver Public School...
The word algorithm is a part of your children’s working vocabulary when they use the Everyday Mathematics program. An algorithm is a set of rules or well-defined procedure guaranteed to achieve a certain objective. For example, following the directions for assembling a new toy for your child, using a recipe, and following any procedure are all examples of algorithms. In mathematics, an algorithm is a recipe for computation.
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Typically you use a recipient public key to establish a cipher key, and then use the cipher key to encrypt the bulk of the message. The integrity of the message is assured by including a MAC of the message. The authenticity of the sender is assured by a digital signature and some certificates. You could look at something like SSL or S/MIME for an example, although these are not really good starting points for designing a new system.
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What remains unknown?

American Social Health Association - HPV Resource Center
What is the potential impact for men, women who have had HPV, and sexually active women? Studies are currently underway to assess HPV vaccine efficacy in different populations, including males and women over the age of 26. Will the vaccines offer protection against other HPV types? Research indicates, for example, that in addition to protecting against HPV 16 and HPV 18, Cervarix may also protect against incident infection with two other "high risk" types, HPV 31 and HPV 45.43
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What does "the following addresses had permanent fatal errors", "host unknown" mean?

Untitled Document
This message is sent back to you, the sender, from the SMTP server. The server is telling you that the "host" you tried to send e-mail to does not exist. The "host" is just the domain name proceeding the "@" in the e-mail address. In the case of jason@Real Web Host, the host would be Real Web Host. If you tried to send a letter via postal mail to a non-existent address, the mail would eventually come back to you with "address unknown" stamped on it by the post office.
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Why am I getting '550 unknown local host, not a gateway' errors?

RELIABLE San Diego Web Hosting provider; also Dedicated Serv...
To combat SPAM, our email servers require authentication to send/recieve mail. All remote clients must enable the SMTP authentication function to send outgoing mail (see answer above). [Back to top]
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I see some "unknown variable" errors in the server output after upgrading. Why?

Opennap NG 0.49 @ SF - FAQ
Your config file apparently reflects the capabilities of an earlier Opennap NG version. See changed variables to learn what variables were removed from previous versions and why. It is recommended to let the GUI config tool update your existing config file. It is capable of reading older ones, as far as their contents are still part of Opennap NG, and create a new one, also with new, previously missing variables and comments added.
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What are all those deinterlace algorithms ?

DScaler - Frequently Asked Questions
Yes you can. DScaler is being developped mainly by people using it as an analog source scaler for their projector and they prefer for sure using DScaler from their remote on the sofa rather than from their desk ;-) DScaler is thus filled with keyboard shortcuts for all main options so that you can do everything quickly. We also suggest the use of Girder from Ron Bessems as the application of choice for remote controlling your computer. An export group has been developped. Download it here.
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How do I resolve "Unknown symbol" errors while loading the UVC driver?

FAQs — QuickCam Team
When you try to load the UVC driver you can get errors like the following in your syslog: uvcvideo: symbol v4l_compat_ioctl32 This usually means that you forgot to load a module required for the operation of the UVC driver. Unless you've compiled all the required functionality into your kernel make sure that the following modules are loaded: videodev
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Do you have symbols for unknown plants?

Frequently Asked Questions | USDA PLANTS
Yes. The symbols for unknown plants represent generic categories such as ‘deciduous tree’ or ‘herbaceous vine’ that are useful in survey, monitoring, and inventory work. These symbols and associated descriptive names are widely used by a number of federal agencies.
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How does RL relate to genetic algorithms?

RL FAQ
Most work with genetic algorithms simulates evolution, not learning during an individual's life, and because of this is very different from work in RL. That having been said, there are two provisos. First, there is a large body of work on classifier systems that uses or is closely related to genetic algorithms. This work is concerned with learning during a single agent's lifetime (using GAs to organize the components of the agent's mind) and is in fact RL research.
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What about search engines changing their algorithms ...how do you address that?

SEO Tutor - Frequently Asked Questions - SEO Training Guide
Contrary to what many other SEO's have recommended over the years and their countless discussions on this topic, we have successfully determined, practiced and shared an effective optimization strategy that has prevailed where others have failed.
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What are the alternative algorithms? Why are these part of the Everyday Mathematics curriculum?

UCSMP: Everyday Mathematics
For decades, all American school children have been taught one standard procedure for each of the four basic operations of arithmetic. These "standard" algorithms, like the regrouping ("borrowing") algorithm for multi-digit subtraction and the long division algorithm, are not the only way to perform these operations. There are many alternative algorithms taught in other countries. Compared to the standard U.S.
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Have the algorithms been documented?

MODIS Atmosphere: Filled Land Surface Albedo Product: Freque...
Yes. Two papers have been written. The first paper (Moody, E. G., M. D. King, S. Platnick, C. B. Schaaf, and F. Gao, 2005: Spatially complete global spectral surface albedos: Value-added datasets derived from Terra MODIS land products. IEEE Transactions on Geoscience and Remote Sensing, Vol. 43, 144-158) describes the temporal interpolation technique, data available, and provides error analysis.
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What are encryption algorithms?

ICT Authority - IT - FAQ
Encryption algorithms are mathematical formulas that are used to transform a readable message to a message that can only be read by the intended recipient. In this encryption method the information is encrypted so that only the intended recipient is able to read and transform the message. The message can be intercepted, but it is useless to a person, who cannot decrypt it. Encryption and decryption of the information requires, in addition to the encryption algorithm, a key.
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Why should algorithms be profiled?

ISG FAQ
It gives feedback to other MPEG-4 subgroups on the complexity of some functionality. Functions with high complexity are encouraged to be simplified (e.g. simplification of the padding - see [M1097, M1490, M1578, M1814, M2039, M2129, M3572])
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What algorithms are patented?

Mark Nelson's FAQ
The best overview I know of on this topic can be found in the comp.compression FAQ. You can find the comp.compression FAQ via a link on my FAQ, follow the links from my home page. comp.compression and comp.compression.research sometimes will turn up answers to questions regarding specific techniques, but the murkiness of patent law makes it hard to trust *any* source of information.
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What about errors?

We make every effort to achieve 100% accuracy in all areas of our business, but we are not perfect and we reserve the right to make changes in products information, pricing, availability status, and all other information without notice. FoxElectricSupply.com cannot be held responsible for any misrepresentations associated with any product or price contained in this web sight.
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Relyon SaralTDS : Frequently Asked Questions
FVU checks the text file with the format prescribed by NSDL. The deficiencies found in the file are known as errors. This may be due to invalid data provided or dates/amounts out of limits, etc
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National Voice and Data - Audit
For the most part, long distance and data providers are more loosely regulated than local phone service companies. Local phone service providers such as Verizon, SBC, Pac Bell, Bell South, Southwestern Bell, etc. are and have always been considered more of a public utility. Meaning they are essential to the well-being of the country in general. This is why they are very restricted by the FCC as it pertains to pricing. Local phone service needs to be affordable to the public.
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Help:Faq - Genealogy
Every (almost) page has an edit button at the top. Select the edit button and fix it. That's what wiki is all about.
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Hisweloke - Sindarin dictionary
If you think there is an error (even a mere typo) in the dictionary, please report it to the Sindarin dictionary group. Many errors have been reported by readers since the dictionary is available. However, I update the dictionary during my spare time, so don't hope to see the errors you reported quickly corrected...
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What are TFT algorithms?

TFT FAQs
Determined using TFT causal diagnostic procedures, the algorithms are precise treatment sequences that are known to have a curative effect when applied to specific problems.
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I keep getting 'unknown address.' What can I do?

Frequently Asked Questions For soc.genealogy.misc
From time to time, you may find that when you try to send a reply to a GENMSC-L message, the message gets returned by your name server with the reason 'unknown address'. There is a good chance that the mail.eworld.com machine will know the address. To send your message via this machine (NOT VIA GENMSC-L@mail.eworld.com), you will have to modify the address you are using. To send this message via mail.eworld.com, change the '@' to a '%' and add the @mail.eworld.com to the end:
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Can you decipher this mysterious/unknown bit of writing?

Omniglot - Frequently Asked Questions
Maybe - send your images to and I will try to identify the writing system and the language it's written in. I'll also have a go at deciphering the text, but if I'm unable to do so, I'll post it on my puzzles page.
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How could so many deaths have been unknown?

Resources - Timor-Leste FAQs
Most of the conflict-related deaths in Timor-Leste occurred in the late 1970's and early 1980's when access to Timor-Leste was very limited. At that time, human rights groups, humanitarian agencies and the international community were only able to document a portion of the political violence and famine-related deaths which occurred.
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Why are some files made by 'unknown' ?

NoGrip :: FAQ
There are 2 reasons for this, either the original author of the file is literally 'unknown' or the person who made the file is not registered on the site yet, and because of the way the database works it was necessary for a special user 'unknown' to be used to facilitate transfering files from the old site to this new site.
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What of all the unknown consequences?

Frequently Asked Questions | Faslane 365
There are always unknown consequences. All we can do is to think hard and try to imagine what they may be, but we will not be able to imagine them all. Our only guide is to act purely and with honest good intent, to be mindful and thoughtful. Our fears can either paralyse us, or - more constructively, we can use them to act as a stimulus for our creativity to overcome any obstacles or unanticipated developments.
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How does a participant sign up for multiple algorithms per task?

NIST Iris Challenge Evaluation FAQ
Send an e-mail to the ICE 2006 liaison at ice2006@nist.gov requesting to submit multiple algorithms per task.
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