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Topic: Limma


In the News (Sat 26 Dec 09)

  
  Limma - Wikipedia, the free encyclopedia
The original Pythagorean limma, 256/243, discussed at Pythagorean intervals.
The 5-limit limma, 128/125, the amount by which three just major thirds fall short of an octave.
Although closer in size to the Pythagorean apotome than to the limma, it has been so called because of its function as a diatonic semitone rather than a chromatic one.
en.wikipedia.org /wiki/Limma   (108 words)

  
 LIMMA Library: Linear Models for Microarray Data
LIMMA is available from the R Project CRAN site or as part of Bioconductor project.
The Limma User's Guide is also available as a link from the Bioconductor developmental limma package page.
Limma is an implementation of a body of methodological research by the authors and co-workers.
bioinf.wehi.edu.au /limma   (500 words)

  
 Louisiana Independent Music Manufacturers Association (LIMMA)
The Louisiana Independent Music Manufacturers Association (L.I.M.M.A) is a professional trade association that combines the strength of Louisiana's independent music manufacturers and publishers in order to better promote, market and develop their products and to provide them with a stronger voice on legislative issues affecting the industry.
LIMMA representatives keep local tourism and convention bureaus, tourism marketing concerns, private promoters and the state tourism office constantly aware of the availability of our music for special projects and promotions.
LIMMA maintains contact with the state film commission and the film commission of the City of New Orleans, requests information on every new film project proposed in the state in order to check for music/soundtrack opportunities, and makes direct contact with production companies that have a history of working in Louisiana.
limma.org   (659 words)

  
 BioMed Central | Full text | Microarray analysis after RNA amplification can detect pronounced differences in gene ...
With limma, 87 out of the top 100 most significant genes were common to the OneRA and the TwoRA comparisons as oppose to 59 using Z-scores statistics.
The FCE probesets are highlighted in red on figure 7 and it can be seen that their nlPv are least correlated between the two protocols, due to distortions in the expression ratios (scatter on figure 5c).
Finally, application of such technique in combination with limma statistical analysis is useful in experiments where the ultimate purpose is to experimentally characterise a finite number of targets, for example the top 100 differentially expressed genes.
www.biomedcentral.com /1471-2164/7/252   (5351 words)

  
 Tonalsoft Encyclopaedia of Tuning - The measurement of Aristoxenus's Divisions of the Tetrachord (c)1999-2004 by Joe ...
This difference, between the semitone derived by Aristoxenus's tuning methods and the one implied by his terminology of 'semitone' or 'half a tone', is a noticeable one to most ears, and should probably be resolved.
The 'limma' 256/243 would be the _pyknon_ remaining in the tetrachord after subtracting the 'ditone' characteristic interval.
It is obvious from this table, where the 'hemiolic chromatic diesis' is slightly larger than the 'semitone' ('limma'), that Aristoxenus's calculations break down in describing the shades of chromatic, particularly confusing the 'relaxed' and 'hemiolic'.
sonic-arts.org /monzo/aristoxenus/318tet.htm   (12892 words)

  
 BioMed Central | Full text | WebArray: an online platform for microarray data analysis
The currently implemented functions were based on limma and affy package from Bioconductor, the spacings LOESS histogram (SPLOSH) method, PCA-assisted normalization method and genome mapping method.
limma (Linear Models for Microarray Analysis) is one of the most commonly used packages in Bioconductor, which has incorporated the most cutting-edge statistical analysis methods, providing normalization and statistical analysis for cDNA microarray.
The key function of the limma package is an implementation of the empirical Bayes linear modeling approach of Smyth [2].
www.biomedcentral.com /1471-2105/6/306   (1822 words)

  
 pythagorean - 3-limit just intonation musical tuning system
The unison-vector which defines this periodicity block is the interval shown as 5 steps on the lattice (in the negative direction), the limma or pythagorean diatonic semitone:
The diatonic semitone is smaller than any of the steps in the scale, thus its role as a unison-vector (in fact, it is the differenc between the two step sizes in this scale).
Another small interval near the origin which may be used as a unison-vector (albeit larger than the limma), is the "apotome", the pythagorean chromatic semitone, shown as 7 steps on the lattice:
tonalsoft.com /enc/p/pythagorean.aspx   (1559 words)

  
 POMELO II General help
The limma t-test is a non-permutation method used to compare gene expression data between two groups.
In contrast, when using limma we use the standard distributions for computing the p-values (i.e., we compare the observed t-statistic agains the expected t-statistic under the null hypothesis by comparing with the t-distribution with a given degrees of freedom).
As explained above, limma does not directly compute the t-statistic with the usual formula, but rather uses a "moderated statistic", where the estimate of the variance for every gene is "moderated" using information from all other genes.
pomelo2.bioinfo.cnio.es /help/pomelo2-help.html   (3728 words)

  
 Microarray data analysis lab
R is open source software and can be downloaded from http://www.r-project.org/, but should already be installed on your computers for this lab.
R is a general (statistical) data analysis tool, but it can be extended with "packages", and several such packages in the area of bioinformatics exist.
Packages can in general be installed using the "Packages" menu of the R window, but the LIMMA package should already be installed on your computer for this lab.
bio.lundberg.gu.se /courses/vt04/ma.html   (1092 words)

  
 Marchettus of Padua's tuning and Gothic cadential aesthetics, by Margo Schulter
One voice moves by what Mark Lindley[1] has aptly called an "incisive" limma of 90 cents, and the other by a generous 204-cent whole-tone (9:8).
In the 1/5-tone reading, this normal semitone would be equal to 2/5-tone or ~81.56 cents; in the 1/9-tone reading, it might be equal to two "parts" of 2/9-tone each, thus yielding a 4/9-tone interval (~90.63 cents) virtually identical to the usual Pythagorean limma of ~90.22 cents).
If we take his "enharmonic" and "diatonic" semitones as essentially equivalent to the Pythagorean limma and apotome, then his narrow cadential leading-tone might be somewhat narrower than the usual 90-cent limma but not quite so narrow as 1/5-tone or 2/9-tone.
sonic-arts.org /td/schulter/sch-mar.htm   (1924 words)

  
 Download Goulphar
Here is the R project site: R project
The packages Goulphar uses are marray, limma, convert et hexbin.
the version of limma has to be upper than 1.8.17.
www.transcriptome.ens.fr /goulphar/download.php   (516 words)

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