Similar work, aimed specifically at UNIX systems, has been done by the Massachusetts Institute of Technology which has developed a basic distributed single sign-on technology called Kerberos. Kerberos has been proposed as an Internet standard (RFC1510).

SESAME's origins lie in the Open Systems Standards work of ECMA, the European Computer Manufacturers Association. In 1987 ECMA started its work on Security in Open Systems. It was here that the early ideas that are the basis of SESAME were formed. Following that first meeting, experts from all of the major computer manufacturers have at different times been involved in this work.

To access the distributed system, a user first authenticates to an Authentication Server to get a cryptographically protected token used to prove his or her identity. The user then presents the token to a Privilege Attribute Server to obtain a guaranteed set of access rights contained in a Privilege Attribute Certificate (or PAC). The PAC is a specific form of Access Control Certificate that conforms to ECMA and ISO/ITU-T standards.

Depression is one of the more common symptoms of PMDD. Women often feel sad, blue, unhappy, down in the dumps, and/or hopeless as part of the PMDD symptom complex. But remember, the depressive symptoms of PMDD are linked to the menstrual cycle and must be absent at least during the week following menses. Also, depression is not necessary for the diagnosis of PMDD.

Ideally, the ideas of reinforcement learning could constitute part of a computational theory of what the brain is doing and why. A number of links have been drawn between reinforcement learning and neuroscience, beginning with early models of classical conditioning based on temporal-difference learning (see Barto and Sutton, 1982; Sutton and Barto, 1981, 1990; Moore et al., 1986), and continuing through work on foraging and prediction learning (see Montague et al.

Formally, RL is unrelated to behaviorism, or at least to the aspects of behaviorism that are widely viewed as undesireable. Behaviorism has been disparaged for focusing exclusively on behavior, refusing to consider what was going on inside the head of the subject. RL of course is all about the algorithms and processes going on inside the agent. For example, we often consider the construction of internal models of the environment within the agent, which is far outside the scope of behaviorism.

Melatonin levels decrease with age and this deficit may play an important role in the high frequency of insomnia among elderly people. A disruption in the normal sleep-wake cycle caused by shift work, jet lag, stress, or other factors can also trigger abnormal levels. Low levels of melatonin have been linked to depression and many degenerative diseases, such as AIDS and cancer. Melatonin also has the potential to modify ovarian function.

Percolation is an arrangement of parts (usually visualised as a matrix) such that a property can arise that connects the opposite sides of the structure. This can be regarded as making a path in a disconnected matrix or making an obstruction in a fully connected one. The boundary at which the system goes from disconnected to connected is a sudden one, a step or phase change in the properties of the system.

In nonlinear studies we find much structure for very simple systems, as seen in the self-similar structure of fractals and the bifurcation structure seen in the logistic map. This form of system exhibits complex behaviour from simple rules. In contrast, for self-organizing systems we have complex assemblies generating simple emergent behaviour, so in essence the two concepts are complementary.

The most common mechanism for resolution on the Internet is the Domain Name System (DNS): http as used in URL is a use of DNS. URLs are grouped by domain name and then by some hierarchical structure, originally based on file trees, now possibly unconnected from that but still a hierarchy. DOI names offer a more finely grained approach to naming where each name stands on its own, unconnected to any DNS or other hierarchy.

Many of the cells and molecules that carry out inflammation belong to the immune system, which consists of a brigade of specialized cells, tissues, and natural chemical substances that continually protect the body from harm.

Java is a programming language and a full development environment. Java allows the development of applications (applets) that can run on a variety of platforms (Microsoft is pushing ActiveX as an alternative). Java is ideal for Internet client/server applications. I would suddenly come across a dialog box telling "Illegal operation Performed. CLOSE,DEBUG DETAILS."I once chose Close and I had to logon to the Internet all over again.

Windows NT 4.0 trust relationships are not transitive so if domain2 trusts domain1, and domain3 trusts domain2, domain3 does not trust domain1. This is not the case with the trust relationships used to connect members of a tree/forest in Windows 2000, trust relationships used in a tree are two-way, transitive Kerberos trusts which means any domain in a tree implicitly trusts every other domain in the tree/forest.

SESAME (a Secure European System for Applications in a Multi-vendor Environment) is a research and development project, partly funded by the European Commission under its RACE program. It is also the name of the technology that came out of that project. SESAME is a construction kit - it is a set of security infrastructure components for product developers.

The seed is processed in Paris, Texas, at Sesame Solutions LLC. Some seed is hulled and ends up on top of hamburger buns; some is washed and incorporated into sesame products such as crackers, sticks, and cookies; some is exported to Japan (the second largest importer of sesame in the world); some goes into the making of tahini and halvah; and some is made into flour and oil.

Yes. Sesame supports optional connection security on the server, only allowing specified clients to connect. It can also "deny" connection to a set of specified clients. Sesame also supports login/password security on the application as a whole. Furthermore, users can be placed in groups. Each group can then be set to have read, write, and execute privileges on various elements within the application.

There are several categories of drugs for the treatment of Parkinson's, and it is thought that there may be a connection between some dopamine agonists (one class of drugs that can be used to treat Parkinson's) and the incidence of compulsive behaviour. However, clinical studies have shown this to be an uncommon side effect currently estimated to occur in up to 14% of people taking dopamine agonists.

Hydrogen has more energy per weight, but less energy per volume than any other fuel. One kilogram of hydrogen has approximately the same amount of energy as one gallon of gasoline. Hydrogen is ideal for use in jet airplanes because it is so light. Jet airplanes that use hydrogen require larger fuel tanks, but, because hydrogen is so light, the wings can be smaller, the engines less powerful and the number of passengers can be increased.

To a first approximation, Reinforcement Learning and Neuro-Dynamic Programming are synonomous. The name "reinforcement learning" came from psychology (although psychologists rarely use exactly this term) and dates back to the eary days of cybernetics. For example, Marvin Minsky used this term in his 1954 thesis, and Barto and Sutton revived it in the early 1980's.

Broadly speaking, RL works as a pretty good model of instrumental learning, though a detailed argument for this has never been publically made (the closest to this is probably Barto, Sutton and Watkins, 1990). On the other hand, the links between classical (or Pavlovian) conditioning and temporal-difference (TD) learning (one of the central elements of RL) are close and widely acknowledged (see Sutton and Barto, 1990).

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.

Musculoskeletal disorders (also called MSD’s, RSI’s or MSI’s) include a group of conditions involving nerves, tendons, muscles, and supporting structures. MSD’s can vary in severity from mild periodic symptoms to severe chronic and debilitating conditions. Examples include: Carpal Tunnel Syndrome, tendinitis, tension neck syndrome, and low back pain. Symptoms may include pain, numbness, and tingling.

Researchers in the Information Assurance Research Group of NSA worked with Secure Computing Corporation (SCC) to develop a strong, flexible mandatory access control architecture based on Type Enforcement, a mechanism first developed for the LOCK system. NSA and SCC developed two Mach-based prototypes of the architecture: DTMach and DTOS (http://www.cs.utah.edu/flux/dtos/).

ClickOnce" & MSI are separate but, complimentary application installer technologies. "ClickOnce" is targeted at web based per-user deployments. This has a lot of benefits, but also means you can't do anything & everything at install time. If...

Archie is a special service that keeps file listings from different FTP sites. You can Telnet to an Archie server (login with username 'archie') or use a client program to search for specific files. Here are some sites; send mail to 'archie@site_name' for a help file. Note that some sites do not support mail access. Most do however. archie.au* 139.130.4.6 Australia archie.edvz.uni-linz.ac.at* 140.78.3.8 Austria archie.univie.ac.at* 131.130.1.23 Austria archie.uqam.ca* 132.208.250.

Antigen antivirus and anti-spam products protect at the server to prevent viruses, worms, spam, and inappropriate content from reaching end users. This provides complementary protection to other Microsoft security products.

No. Sesame attempts to achieve the same attitude and philosophy that made Q&A a widely popular database manager. But because Sesame supports many more features, structures, and elements than Q&A, it is impossible to do everything exactly the same way. In every case, we have attempted to determine the intent of the operation, and achieve the same results.

The name Kerberos comes from Greek mythology; it is the three-headed dog that guarded the entrance to Hades.