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# Topic: Minimum message length

 Encrypting the Length of a Message Note that since the length of the message in its final encrypted form is apparent from the message itself, if it is convenient to prefix the message with a field indicating the length of the message, to facilitate decoding the message, this field should not be encrypted. Thus, a message might begin with an eight-bit field indicating that from 0 to 255 bits of random padding are added; then, the random padding might immediately follow, or be appended to the end of the message. The intent is that each message is now concealed with a number of random bits belonging to an unknown distribution, which is persistent for each given message, so the steps in the length of the message due to the varying length of its symbols after compression are not recoverable. www.quadibloc.com /crypto/mi060309.htm   (5026 words)

 Minimum message length - Wikipedia, the free encyclopedia MML was invented by Chris Wallace, first appearing in the seminal (Wallace and Boulton, 1968). The relation between Strict MML (SMML) and Kolmogorov complexity is outlined in Wallace and Dowe (1999a). The first is the length of the model, and the second is the length of the data, given the model. en.wikipedia.org /wiki/Minimum_Message_Length   (769 words)

 Minimum description length - Wikipedia, the free encyclopedia The minimum description length principle is a formalization of Occam's Razor in which the best hypothesis for a given set of data is the one that leads to the largest compression of the data. Code length of the model and code length of model and data together in MDL correspond to prior probability and marginal likelihood respectively in the Bayesian framework. MML is a fully subjective Bayesian approach: it starts from the idea that one represents one's beliefs about the data generating process in the form of a prior distribution. en.wikipedia.org /wiki/Minimum_description_length   (1532 words)

 David Dowe's Minimum Message Length (MML) Inference page: MML, MDL, minimum encoding length inference, algorithmic ... Minimum Message Length (MML) is an information-theoretic Bayesian principle of inductive inference. "Minimum Message Length, MDL and Generalised Bayesian Networks with Asymmetric Languages", by J. Comley and D.L. Dowe; Chapter 11 (pp265-294) in P. Grunwald, M. Pitt and I. Myung (eds.), Advances in Minimum Description Length: Theory and Applications, M.I.T. Press, April 2005, ISBN 0-262-07262-9. Dowe) "Minimum Message Length, MDL and Generalised Bayesian Networks with Asymmetric Languages", Chapter 11 (pp265-294) in P. Grunwald, M. Pitt and I. Myung (eds.), Advances in Minimum Description Length: Theory and Applications, M.I.T. Press, April 2005, ISBN 0-262-07262-9. www.csse.monash.edu.au /~dld/MML.html   (1559 words)

 PFSA Modelling of Behavioural Sequences by Evolutionary Programming A better method is that of estimating the length of the message required to communicate the structure of a PFSA model. The optimal model is that which has the shortest estimated message length [11]. The message length is expressed in nits, that is, the natural logarithm (bits). www.complexity.org.au /ci/vol02/dn_cmplx/dn_cmplx.html   (2291 words)

 Set IR minimum message length MML contains the length of the shortest IR receive message in bytes which will be considered a valid message and sent to the host. IR receiver modules such as the one on the Slink-e-e tend to be very sensitive to both optical and electrical noise, causing them to occasionally generate false pulses when there was no actual IR signal. By setting a minimum message length, false pulses will be ignored and not reported to the host. www.connact.com /~eaw/slinke/help/fp/Slinke/lowlevel/set_irmml.htm   (148 words)

 PyMML 0.5 A single bit is used in the message to convey whether a hidden factor is present or not. Individual priors are given by a tuple containing the class of estimator to use for that field followed by the parameters of the prior to be passed to that estimator. The advantage of MML here is that it can use length calculations to determine the number of classes that can best be used to describe the data. www.logarithmic.net /pymml-doc   (2329 words)

 Direct Internet Message Encapsulation – DIME Because of the large number of often controversial message encapsulation formats, record marking protocols and in particular layered multiplexing protocols that have been brought up in the past and of which several are under consideration elsewhere, we would like to be as explicit about the goals and in particular the non-goals of DIME as possible. If the length of the payload id value is not a multiple of 4 octets, the generator MUST pad the value with all zero octets and this padding is not included in the ID length field. If the length of the payload is not a multiple of 4 octets, the generator MUST pad the value with all zero octets and this padding is not included in the DATA length field. www.gotdotnet.com /team/xml_wsspecs/dime/dime.htm   (3556 words)

 [No title]   (Site not responding. Last check: 2007-08-03) The payload length is an integer indicating the number of octets of the payload. The first record in a message is marked with the MB (Message Begin) flag set and the last record in the message is marked with the ME (Message End) flag set (see section 3.2.1 and 3.2.3). The minimum message length is one record which is achieved by setting both the MB and the ME flag in the same record. msdn.microsoft.com /library/en-us/dnglobspec/html/draft-nielsen-dime-02.txt   (6203 words)

 Bits-back argument The minimum message length encoding, which was discussed in section 4.3.2, is not decodable, that is, it is not sufficient to actually find x. Although the length of the first part of the message is very high, most of it is actually used by the secondary message. is the finite accuracy used in the minimum message length scheme. www.cis.hut.fi /~harri/thesis/valpola_thesis/node30.html   (503 words)

 Data Dictionaries Bounding Criteria The message sets should not specify permissible ranges of values for data elements, as this information should already be specified for the data elements as part of the meta data about them in an ITS data dictionary. However, in a message set one should be able to specify the sequence of data elements appearing in a message, as well as allowable ranges of repeating data elements within a message (e.g., maximum four sets of Routes returned). It may be also useful to specify whether a message set requires encryption of its contents, although specific encryption schemes may not be specifiable due to the wide variety of schemes and their interaction with and dependence upon specific applications or kinds of applications. grouper.ieee.org /groups/scc32/MSTOVRVW.html   (5341 words)

 Hang Up Detect When Replaying Messages - VoiceGuide I have tried to set the min message length to 4 seconds but it is still doing it from time to time. The actual amount of dial tone left on the message is usually about a second or so(irrespective of whether RecCutifHangupBytes_Dialogic is set to 14000 or 80000), but it does vary a little from message to message. So, either I need to ensure the min message length stops these 3 second "hang-ups" being recorded, or we need to look into why there is still some dial tone left on the end of very short messages. voiceguide.com /forums/index.php?s=fb37e572147a940d83b168663cc49927&showtopic=4507   (2644 words)

 Minimum Message Length and Kolmogorov Complexity -- Wallace and Dowe 42 (4): 270 -- The Computer Journal Minimum Message Length and Kolmogorov Complexity -- Wallace and Dowe 42 (4): 270 -- The Computer Journal Articles by Wallace, C. Articles by Dowe, D. Minimum Message Length and Kolmogorov Complexity message length approach to statistical inference and machine comjnl.oxfordjournals.org /cgi/content/abstract/42/4/270   (292 words)

 STATCON: Statistical and Inductive Inference by Minimum Message Length The Minimum Message Length (MML) Principle is an information-theoretic approach to induction, hypothesis testing, model selection, and statistical inference. MML, which provides a formal specification for the implementation of Occam's Razor, asserts that the ‘best’ explanation of observed data is the shortest. MML appears also to provide both a normative and a descriptive basis for inductive reasoning generally, and scientific induction in particular. www.statcon.de /statconshop/product_info.htm?cPath=24_33&products_id=477   (274 words)

 Minimum Encoding Length Induction   (Site not responding. Last check: 2007-08-03) Minimum encoding length approaches perform induction by seeking a theory that enables the most compact encoding of both the theory and available data. Neither MDL nor MML with its default prior would add complexity to a decision tree if doing so were justified solely on the basis of evidence from neighboring regions of the instance space. It should be noted, however, that the probabilistic interpretation of these minimum encoding length techniques indicates that encoding length minimization represents maximization of posterior probability or of unconditional likelihood. www.cs.washington.edu /research/jair/volume4/webb96a-html/node15.html   (271 words)

 [No title]   (Site not responding. Last check: 2007-08-03) It uses two- * way connections to send the messages, and waits for a reply to * each message before sending the next - note that this is not * the fastest way to use IMP to send messages. If the message * is one we need to deal with explicitly, eg a 'task located' or * 'connection established' message, call the appropriate action * routine (Connected() or Located()). The message sent is a buffer of * ints, with the first value it contains being the current message * count, and subsequent values being increasing integers from 1 up. www.aao.gov.au /AAO/drama/doc/atest.example   (1668 words)

 Qwest | Wholesale Message Send allows an end-user to create a message in their mailbox and send it to one or more other Qwest mailbox(es). Messages sent or marked as "Private" cannot be copied and re-sent to another mailbox subscriber. When confirmation is selected, the Voice Messaging service will automatically place a message in the mailbox to let the end-user know if the recipient heard, or did not hear, their message. www.qwest.com /wholesale/clecs/features/vmmbxbus.html   (1681 words)

 MDMC Software - CaMML It does this by sampling from a posterior distribution over the causal model space, using a minimum message length (MML) probability [1]. MML provides an information-theoretic metric which combines a model complexity penalty with a penalty for unexplained data values. A distinguishing feature of the MML metric from all others is that CaMML samples the space of totally-ordered models, rather than directed acycle graphs (DAGs) or patterns (statistically equivalent DAGs) [6]. www.datamining.monash.edu.au /software/camml   (859 words)

 DIMACS Workshop on Complexity and Inference An application of this idea to parametric probability models involves minimization of the code length for the data with a model whose code length, that depends on the number of parameters and their quantization, does not exceed a preselected bound. When the best model of the desired code length is projected back to the data as a "smooth" curve we get not only a means to model data with distortion but also a different approach to Shannon's rate-distortion theory. Our first result, is that the plug-in estimate of entropy is as efficient as a match length estimator when applied to the class of memoryless sources on a countable alphabet with finite entropy and finite entropy ``variance". www.stat.ucla.edu /~cocteau/complexity/abs.html   (6073 words)

 Kahlil Gibran Guestbook - Instructions and Overview Minimum message length is 6 characters, maximum is 4000 characters (about 100 lines). Type the code (including the colons) into the message. Tick the box if you don't want to include your message in the guestbook - it will be e-mailed to me instead. www.kahlil.org /gboverview.html   (189 words)

 Decision Graphs - An Extension of Decision Trees - Oliver (ResearchIndex) We present an inference scheme to construct decision graphs using the Minimum Message Length Principle. 216 A universal prior for integers and estimation by minimum des.. Minimum Message Length Segmentation - Oliver, Baxter, Wallace (1997) citeseer.ist.psu.edu /oliver93decision.html   (708 words)

 The Likelihood Principle and MML Estimators - Baxter (ResearchIndex)   (Site not responding. Last check: 2007-08-03) Abstract: : The minimum message length (MML) family of estimators are discrete Bayesian point estimators which violate the Likelihood Principle. The nature of the breach is examined and examples are given. MML proponents have claimed that the violation is an `innocent' one. citeseer.ifi.unizh.ch /25974.html   (355 words)

 Data Link Layer and IEEE These message types are the same for both formats above with the exception of the pad bytes. The pad bytes for the RFC 894 and RFC 1042 datagrams are of different lengths between the two message formats because the RFC 894 minimum message length is 46 bytes and the RFC 1042 minimum message length is 38 bytes. This is because the RFC 894 possible length values are exclusive of RFC 1042 possible type values. www.comptechdoc.org /independent/networking/guide/netieee.html   (1039 words)

 [No title] The channel seizure is 250ms in length and is 300bits of alternating 1's and 0's beginning with a 0 and ending with a 1. The binary converted to decimal is the message length. When the message is received by the CPE it checks for errors by taking the received checksum word and adding the modulo 256 sum of all of the other words received in the message. artofhacking.com /files/callerid/CIDCLOSE.TXT   (2486 words)

 CSE Thesis Topic The Minimum Message Length (MML) principle is a universal principle applicable in machine learning, statistics, econometrics and data mining. In its most general form, MML can in principle be used to infer any arbitrarily complex computable function that might underly a body of data. One part of the project is concerned with optimal MML encoding - this will entail both optimal encoding of logic programs and optimal encoding of the data given the relevant logic programs. www.cse.unsw.edu.au /db/thesis/topicinfo/MEB02.html?printable=yes   (284 words)

 ASA - November 2002: Design detection and minimum description length Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ] length; it is simply the most parsimonious description of the data. So suppose my message length is N bits, and the length of the message www.asa3.org /archive/ASA/200211/0155.html   (1345 words)

 [No title] Messages may be retrieved from within or outside the end-user’s system. Message Notification — Residence and Business (link blue text to: http://www.qwest.com/wholesale/clecs/features/messnotresbus.html) programs the voice messaging to notify a pager or telephone number when a message is received. The following message length is a system parameter that cannot be adjusted or lengthened: Maximum message length is three minutes Minimum message length is.5 seconds (messages/hang-ups under.5 seconds will not show up as a message) Message Capacity refers to the number of messages a mailbox will store at one time. www.qwest.com /wholesale/downloads/2005/050309/PCAT_bvms_V7.doc   (1518 words)

 Call Options   (Site not responding. Last check: 2007-08-03) Minimum Message Length field: Enter the minimum length of messages, in seconds. Caller Number of Retries field: Enter the number of invalid attempts allowed when the caller is in the voice mail system before the system disconnects the call. User Number of Retries field: Enter the number of invalid attempts allowed when the user is in the voice mail system before the system disconnects the call. www.esnatech.com /tech_support/knowledge_base/TOL/Admin_Help/Company_Call_Options_Tab.htm   (285 words)

 Minimum Message Length MML If T can find a good hypothesis, H, (theory, structure, pattern,...) to fit the data then she may be able to transmit the data economically. The message paradigm keeps us "honest": Any information that is not common knowledge must be included in the message for it to be decipherable by the receiver; there can be no hidden parameters. The MML principle is one way to justify and realise Occam's razor. www.csse.monash.edu.au /~lloyd/tildeMML   (656 words)

 FUDforum: FUDforum Suggestions => Minimum message length It would be nice if I could set the forum to reject message that contain no "real" content by either specifying a minimum post length or the board automatically determining that there was nothing actually said. So, posts that are nothing but a quote or a URL will present the user with an error informing him that he has not met the minimum post length requirement. If the problem is just with a certain user or two you could remove their permission to create threads by setting Post to "no" in the Group(s)manager. fudforum.org /forum/index.php?t=msg&th=6240&   (257 words)

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