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# Topic: Sequence

###### In the News (Sun 21 Apr 19)

 CATHOLIC ENCYCLOPEDIA: Prose or Sequence Sequence differs also in structure and melody from the hymn; for whilst all the strophes of a hymn are always constructed according to the same metre and rhythm and are sung to the same melody as the first strophe, it is the peculiarity of the Sequence with the Alleluia and its versicle gradually disappeared, and as for some reason or other the desire for novelty arose, titles were adopted which seem to us rather far-fetched. French Graduals almost all the sequences of the first epoch were supplanted by the later ones, whereas in Germany, together with the new ones a considerable number of those which are supposed to be Notker's remained in use as late as the fifteenth century. www.newadvent.org /cathen/12481d.htm   (5116 words)

 Sequence - Wikipedia, the free encyclopedia In mathematics, a sequence is a list of objects (or events) arranged in a "linear" fashion, such that the order of the members is well defined and significant. A subsequence of a given sequence is a sequence formed from the given sequence by deleting some of the elements without disturbing the relative positions of the remaining elements. If the terms of the sequence are a subset of a ordered set, then a monotonically increasing sequence is one for which each term is greater than or equal to the term before it; if each term is strictly greater than the one preceding it, the sequence is called strictly monotonically increasing. en.wikipedia.org /wiki/Sequence   (614 words)

 PlanetMath: sequence   (Site not responding. Last check: ) is a finite ordinal, then we say the sequence is a finite sequence. This is version 5 of sequence, born on 2001-10-19, modified 2002-08-31. Sequence is any number set, which is arranged in a way that one number comes first, one second, one third and it is possible for every number of the set to define at which place of the sequence it stands. planetmath.org /encyclopedia/Sequence.html   (201 words)

 DNA sequence - Wikipedia, the free encyclopedia A DNA sequence or genetic sequence is a succession of letters representing the primary structure of a real or hypothetical DNA molecule or strand, with the capacity to carry information. Typically the sequences are printed abutting one another without gaps, as in the sequence AAAGTCTGAC, going from 5' to 3' from left to right. With regard to its biological function, which may depend on context, a sequence may be sense or anti-sense, and either coding or noncoding. en.wikipedia.org /wiki/DNA_sequence   (158 words)

 Introduction to UML 2 Sequence Diagrams UML sequence diagrams model the flow of logic within your system in a visual manner, enabling you both to document and validate your logic, and are commonly used for both analysis and design purposes. Figure 1 depicts a UML sequence diagram for the Enroll in University use case, taking a system-level approach where the interactions between the actors and the system are show. Messages are indicated on UML sequence diagrams as labeled arrows, when the source and target of a message is an object or class the label is the signature of the method invoked in response to the message. www.agilemodeling.com /artifacts/sequenceDiagram.htm   (3167 words)

 Fibonacci Sequence (PRIME) This is an example of a recursive sequence, obeying the simple rule that to calculate the next term one simply sums the preceding two: Notice that the rectangles which result at each stage are all roughly the same shape, that is, that the ratio of length to width seems to “settle down” as we build the pattern outward. This sequence converges, that is, there is a single real number which the terms of this sequence approach more and more closely, eventually arbitrarily closely. www.mathacademy.com /pr/prime/articles/fibonac/index.asp   (720 words)

 Introduction to Algebra The sequence 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 is the sequence of the first 10 odd numbers. The sequence 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 is the sequence of 12 alternating 1's and 0's. The sequence 0, 1, 4, 9, 16, 25, 36, 49 is the sequence of the squares of the first 8 whole numbers. www.mathleague.com /help/algebra/algebra.htm   (2324 words)

 Java Modeling: A UML workbook, Part 2 As I explained in my introductory column, sequence diagramming is used to depict the internal behavior of a system over time. Sequence diagrams are used to depict two different types of interaction among objects. Generic sequence diagrams make use of conditional logic, which can be useful for describing the alternative flow of events over the course of an interaction. www-106.ibm.com /developerworks/java/library/j-jmod0605   (1709 words)

 The EMBL Nucleotide Sequence Database Main sources for DNA and RNA sequences are direct submissions from individual researchers, genome sequencing projects and patent applications. Each of the three groups collects a portion of the total sequence data reported worldwide, and all new and updated database entries are exchanged between the groups on a daily basis. The EMBL nucleotide sequence database is part of the The Protein and Nucleotide Database Group (PANDA). www.ebi.ac.uk /embl/index.html   (343 words)

 BLAST: Basic Local Alignment and Search Tool The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance of matches. BLAST can be used to infer functional and evolutionary relationships between sequences as well as help identify members of gene families. Using the BLAST web pages it is possible to input "batches" of sequences into one form and retireve the results. www.ncbi.nlm.nih.gov /BLAST   (247 words)

 CREATE SEQUENCE After a sequence value is generated by one user, that user can continue to access that value regardless of whether the sequence is incremented by another user. Sequence numbers are generated independently of tables, so the same sequence can be used for one or for multiple tables. for an ascending sequence or -1 for a descending sequence. download-west.oracle.com /docs/cd/B19306_01/server.102/b14200/statements_6015.htm   (961 words)

 InterMath / Dictionary / Description The individual numbers, figures, or letters in the sequence are called the terms of the sequence. Typically, only the first 3 or 4 terms of a sequence are listed, followed by an ellipsis (three periods which mean "and so on"). Numerical sequences can be classified according to the method used to get from one term to the next. www.intermath-uga.gatech.edu /dictnary/descript.asp?termID=326   (220 words)

 CLHS: System Class SEQUENCE   (Site not responding. Last check: ) Sequences are ordered collections of objects, called the elements of the sequence. The types vector and the type list are disjoint subtypes of type sequence, but are not necessarily an exhaustive partition of sequence. When viewing a vector as a sequence, only the active elements of that vector are considered elements of the sequence; that is, sequence operations respect the fill pointer when given sequences represented as vectors. www.lisp.org /HyperSpec/Body/syscla_sequence.html   (68 words)

 Sequence Manager   (Site not responding. Last check: ) The sequence manager implementation class ojb.broker.util.sequence.SequenceManagerHighLowImpl and is able to generate ID's unique to a given object and all extent objects declarated in the objects class descriptor. Database based sequences (sequence objects, sequence generators) are special (single-row) tables in the database created with an specific statement, e.g. If set true OJB try to build a sequence name by it's own (a simple algorithm was used to auto-generate the sequence name - more details how it works in pitfalls section) and set this name as sequence-name in the field-descriptor of the autoincrement field if no sequence name is specified. db.apache.org /ojb/docu/guides/sequencemanager.html   (3394 words)

 The DNA sequence and biological annotation of human chromosome[thinsp]1 : Nature Patterns of sequence variation reveal signals of recent selection in specific genes that may contribute to human fitness, and also in regions where no function is evident. Sequence annotation—the process of gathering all of the available information and relating it to the sequence assembly—is essential to develop our understanding of the information stored in human DNA. By aligning the human contigs to the genome sequences of mouse, rat and chimpanzee, we estimated that the remaining nine gaps total 0.53 Mb (Supplementary Table S2). www.nature.com /nature/journal/v441/n7091/full/nature04727.html   (5769 words)

 Accessing Sequence Records Comparing a gene's mRNA sequence with its genomic sequence reveals a great deal, such as where nucleotides that code for the mRNA transcript begin and end, what segments of a gene actually code for amino acids, and how much of a gene's sequence is comprised of intron DNA. Reference sequences should be used when available because they have been (or are in the process of being) reviewed by NCBI staff to ensure completeness and freedom from error and contamination. Whenever a sequence is changed, the version number is increased and a new GI is assigned. www.ornl.gov /sci/techresources/Human_Genome/posters/chromosome/sequence.shtml   (3197 words)

 genome.gov | Human Genome Sequence Quality Standards The sequence should be no less than 99.99% accurate (an error rate of no more than 1/10,000); ambiguities (places where bases cannot be called unambiguously even though sequence reads are available) are to be counted as errors. The sequence should ideally contain no gaps; gaps are regions for which no sequence reads can be obtained for biological reasons (as opposed to lack of interest on the part of the sequencing laboratory). Sequence quality issues have also been discussed at two meetings of the Principal Investigators of the NHGRI-sponsored large-scale sequencing grants, which took place in July and December of 1997. www.genome.gov /10000923   (4576 words)

 genome.gov | Intellectual Property of Human Genomic Sequence The HGP is an international research effort, begun in 1990, which has the scientific goals of generating maps of the human genome [1] and producing the complete sequence of the human DNA by the year 2005. Although there are many other types of information that contribute to the understanding of human biology, e.g., DNA sequence of model organism genomes, in the end, the only source of definitive information about the human is the human sequence. It is therefore NHGRI s intent that human genomic DNA sequence data, generated by the projects funded under RFA HG-95-005, should be released as rapidly as possible and placed in the public domain where it will be freely available. www.genome.gov /10000926   (988 words)

 UofS Chemistry - NMR Booking Schedules In the simple 1D pulse sequence shown in the hardware section, the preparation time consists of an interpulse delay which allows for the spin system to relax towards equilibrium. The utility of this pulse sequence lies in its ability to refocus dephasing magetization and eliminating chemical shift effects from a pulse sequence. Also, note that at the end of the pulse sequence the vectors will always be aligned along the same axis regardless of precession frequency or, what is equivalent, regardless of chemical shift. chem4823.usask.ca /pulseseq.html   (1594 words)

 sequence on Encyclopedia.com   (Site not responding. Last check: ) A sequence may be either finite, e.g., 1, 2, 3, … 50, a sequence of 50 terms, or infinite, e.g., 1, 2, 3, … , which has no final term and thus continues indefinitely. The terms of a sequence, when written as an indicated sum, form a series ; e.g., the sum of the sequence 1, 2, 3, … 50 is the series 1 + 2 + 3 + … + 50. Sequence Diagram Like an MSC (Message Sequence Diagram), the Sequence Diagram depicts the message flow between e. www.encyclopedia.com /html/s1/sequence.asp   (818 words)

 Sequence A sequence diagram shows the messages exchanged between collaborating objects to accomplish a task or goal. You should be able to point Sequence at any of the following, as the starting point and be able to generate a srquence diagram. Collaboration diagrams, these are similiar to sequence diagrams, but emphasize the connections between the objects. www.codeplex.com /sequence   (787 words)

 Fibonacci sequence A mathematical sequence consists of a series of numbers, usually starting at 0 or 1, all of which are derived from preceeding ones according to formal rules. One of the most well-known sequences was one derived by the Italian medieval mathematician known today as Fibonacci. In his Liber Abaci, published in 1202, he explained a simple sequence, where every number is the sum of the two numbers preceeding it. www.fuzzygalore.biz /articles/fibonacci_seq.shtml   (601 words)

 Oracle/PLSQL: Sequences (autonumber) A sequence is an object in Oracle that is used to generate a number sequence. The first sequence number that it would use is 1 and each subsequent number would increment by 1 (ie: 2,3,4,...}. For example, if the last value used by the Oracle sequence was 100 and you would like to reset the sequence to serve 225 as the next value. www.techonthenet.com /oracle/sequences.php   (462 words)

 PostgreSQL: Documentation: Manuals: PostgreSQL 7.4: CREATE SEQUENCE Temporary sequences exist in a special schema, so a schema name may not be given when creating a temporary sequence. The sequence name must be distinct from the name of any other sequence, table, index, or view in the same schema. Furthermore, although multiple sessions are guaranteed to allocate distinct sequence values, the values may be generated out of sequence when all the sessions are considered. www.postgresql.org /docs/7.4/static/sql-createsequence.html   (609 words)

 Sequence Formats If two sequences are merged into one, then the new sequence will get a new Accession number and the Accession numbers of the merged sequences will be retained as 'secondary' Accession numbers. The details of how many sequences are held in one file differs between formats, but they either allow many sequences to be concatenated one after the other, or they hold the sequences together in some sort of aligned set of sequences. An attempt to concatenate several sequences in one file leaves the results as a mess that makes it impossible to decide where the sequences start and end or what is annotation and what is sequence. emboss.sourceforge.net /docs/themes/SequenceFormats.html   (2431 words)

 A Pattern-Language Sequence for Building a Residential College But if you wish to construct a complex many-featured thing from scratch you must not only know the components that need to be present in the final structure, you must also know the correct embryological sequence—the set of assembly rules—for putting the components and sub-components together in the first place. Alexander calls these assembly rules “generative sequences”: they tell you what decisions you have to make in what order during a construction process. In order to understand the generative sequence you do need to have a picture in your mind of the final structure of your college and the components that will make it up, and so you should first read at least the “How To Build a Residential College” summary page. collegiateway.org /howto/sequence   (1030 words)

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