ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Correlation
  • Springer  (19)
  • Wiley  (2)
  • Annual Reviews
  • 1985-1989  (11)
  • 1980-1984  (10)
  • 1935-1939
  • 1925-1929
Collection
Publisher
Years
Year
  • 1
    facet.materialart.
    Unknown
    Wiley
    In:  Chichester, Wiley, vol. 231, no. 3, pp. 2-203, (ISBN 0-470-02298-1)
    Publication Date: 1982
    Keywords: Data analysis / ~ processing ; Correlation ; Seismic stratigraphy ; Seismics (controlled source seismology)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    facet.materialart.
    Unknown
    Wiley
    In:  New York, 2nd Edition, 709 pp., Wiley, vol. 75, no. 2, pp. 2-203, (ISBN: 3-7643-7143-9)
    Publication Date: 1981
    Keywords: Correlation ; Data analysis / ~ processing ; fit ; Textbook of mathematics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Queueing systems 2 (1987), S. 373-380 
    ISSN: 1572-9443
    Keywords: Correlation ; estimation ; waiting times ; GI/M/m queue
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Serial correlation coefficients are useful measures of the interdependence of successive waiting times. Potential applications include the development of linear predictors and determining simulation run lengths. This paper presents the algorithm for calculating such correlations in the multiserver exponential service queue, and relates it to known results for single server queues.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular evolution 29 (1989), S. 191-201 
    ISSN: 1432-1432
    Keywords: Genetic code ; Amino acid properties ; Correlation ; Cluster analysis ; Discriminant analysis ; Codon plurality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In this paper, I define a measure of the relative position of each amino acid in the genetic code by means of a 21-dimensional vector describing its potential for mutation, in a single step, to each of the other amino acids, or to a chain termination codon. This measure allows us to make a systematic investigation of the type and number of the physicochemical properties of the amino acids that were involved in evolution. The polar character and size of amino acids are identified in this analysis as properties that played a leading role in the evolutionary history of the genetic code. The application of cluster analysis and discriminant analysis reveals the characteristics of the structural organization of the genetic code. Finally, I suggest the existence of a relationship between the molecular weight of the amino acids and the number of synonymous codons.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 71 (1987), S. 375-384 
    ISSN: 1432-2234
    Keywords: MCSCF ; Correlation ; Effective potential
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A method is suggested which allows the inclusion of dynamic correlation into CASSCF calculations. An effective Coulomb hole potential is added to the Hamiltonian. The potential has a simple form, which allows its implementation into existing LCAO programs using Gaussian integral packages. The parameters appearing in the potential are determined by fitting to empirical valence correlation energies for first row atoms. Calculations of ionization energies and electron affinities show considerable improvement compared to the MCSCF values. Test calculations on three molecules give the following results, H2∶ r e=0.745 (0.741) Å, D e=4.62 (4.75) eV; N2∶ r e=1.099 (1.098) Å, D e= 10.42 (9.91) eV; O2∶ r e=1.198 (1.207) Å, D e=4.73 (5.21) eV. Experimental values within parenthesis.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1432-2234
    Keywords: HCP ; FCP ; Basis sets ; Correlation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ab initio calculations using a variety of basis sets and including electron correlation via the MP3 method are reported for HCP and FCP and their positive ions. Comparisons are made with the available experimental data.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cryptology 1 (1989), S. 159-176 
    ISSN: 1432-1378
    Keywords: Cryptanalysis ; Stream cipher ; Correlation ; Linear feedback shift register
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Suppose that the output of a running key generator employed in a stream cipher is correlated to a linear feedback shift register sequence (LFSR sequence) a with correlation probabilityp〉0.5. Then two new correlation attacks (Algorithms A and B) are presented to determine the initial digits of a, provided that the numbert of feedback taps is small (t〈10 ifp≤0.75). The computational complexity of Algorithm A is of orderO(2ck), wherek denotes the length of the LFSR andc〈1 depends on the input parameters of the attack, and Algorithm B is polynomial (in fact, even linear) in the lengthk of the LFSR. These algorithms are much faster than an exhaustive search over all phases of the LFSR, and are demonstrated to be successful against shift registers of considerable lengthk (typically,k=1000). On the other hand, for correlation probabilitiesp≤0.75 the attacks are proven to be infeasible against long LFSRs if they have a greater number of taps (roughlyk≥100 andt≥10).
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 60 (1981), S. 369-377 
    ISSN: 1432-2234
    Keywords: Excited states ; Correlation ; Reorganization ; He-atom
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A method is introduced which allows to compute self-consistent restricted Hartree-Fock wave functions for excited Rydberg configurations. The concepts of reorganization and electron correlation of Rydberg states are discussed. As an illustration Hartree-Fock calculations for the (ls)(nl) Rydberg series of He are presented.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied genetics 59 (1981), S. 129-137 
    ISSN: 1432-2242
    Keywords: Selection ; Mice ; Feeding Efficiency ; Correlation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Selection was practised for improved feed efficiency (gain/feed intake) of mice on two alternative feeding regimes. In one set of lines animals were fed ad libitum, in the other set they were individually fed a fixed amount of feed (about 10% below the control ad libitum intake) which was not changed over generations. For each treatment, a pair of replicate lines (E) were selected on efficiency from 3–5 weeks of age for 8 generations and another pair (L) from 5–7 weeks for 7 generations. A control line was maintained for both E and L lines. In terminal generations mice from each line were tested on each feeding regime, and carcasses of ad libitum fed mice were analysed. The realized heritability (within families) for efficiency averaged 13%, without much variation over treatments. In the E lines efficiency increased by about 18% of the control mean and in the L lines by about 60%, although absolute changes were small, and responses were similar on the two feeding regimes. Weights at the start of test decreased in the E lines and increased in the L lines; weights at the end of test increased in both. When tested on the alternative regimes, no interactions were detected for live weights, weight gains or efficiency; selection under fixed intake led to the same increase in appetite as did that under ad libitum. There were no interactions for carcass composition. Selection for efficiency led to an increase in fatness on both selection regimes and both weight ranges.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1573-5060
    Keywords: Standardization ; Averaging ; Narrow rows ; Multiple Regression ; Multicolinearities ; Prediction equations ; Multiple traits ; Correlation ; Interrelationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The study was conducted to identify plant characters associated with seed yield in close soybean plant spacings. Lines selected from two F6 soybean populations in the F10 generation segragating for degree of stem termination were grown in two locations. Traits measured included lengths of developmental stage. plant and canopy height, number of nodes, lodging at different stages, raceme lengths, and number of nodes and branch number of nodes. One problem in analyzing data and drawing conclusions from such a study is related to the complex nature of the interrelationships of a large number of traits. Another, not unrelated problem, involves the calculation of multiple-regression equations with multicolinearities. Because of these problems, factor analysis was used to study the correlation matrix to identify sets of variables related to the same biological concept or function. The variables within sets were determined for each stem termination type, and measurements of these variables were standardized. Means were calculated by using the sum of the standardized variables for each set. Multiple regression was used to study the relationships between sets as the independent variables and yield as the dependent variable. Individual traits were selected from within each set and substituted in the multiple regression equations calculated with the mean value for each set. With use of this technique to determine multiple regression equations, the resulting equations involved measurements of different biological functions instead of repeated measurements of the same function in the plant. It was found that, in the determinate stem type, the measurement of the seed-filling period and branch number of nodes could possibly be used to predict yield while, in the semideterminate stem type, the measurement of the ‘fixed capital’ function and terminal raceme length were possibly useful. Finally, in the indeterminate stem type, the measurement of the ‘fixed capital’ could be used, but it had a very low predictive value.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 11
    ISSN: 1573-5036
    Keywords: Barley cultivars ; Cations ; Composition ; Correlation ; Interaction ; Macronutrients ; Micronutrients ; Regression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary No differences were found among the five cultivars studied in the relationships between soil chemical properties and crop concentrations or uptake of macro and micro nutrient cations. Soil pH was significantly correlated with both the concentration and yield of most of the cations from grain of all cultivars with no differences between cultivars determined. None of the cultivars showed significant relationships between the concentration of a nutrient element in the whole plant or in the grain and the available nutrient determined from the soil. The degree of association between the concentration of a given cation in the whole plant and in grain was generally small and, in many cases insignificant. Those cations showing strong relationships were Na, Mn, and Zn. These relationships were not found to differ between cultivars. Stepwise regression analysis showed pH to be the dominant factor determining the composition of whole plants and grain. Addition of soil available nutrients to the equation resulted in slight reductions in the sums of squares.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 12
    ISSN: 1573-5036
    Keywords: Argile ; Corrélation ; Eléments ; Helminthia echioides ; Sélénium ; Trifolium repens ; Clay loam ; Correlation ; Elements ; Helminthia echioïdes ; Selenium ; Trifolium repens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary Clay loam soils on La Roche-Posay area andHelminthia echioïdes andTrifolium repens growing on them were analyzed for selenium content. On thirty sites, total soil Se concentration varied from 1.7 to 4.5 ppm and soil pH varied from 6.1 to 7.2. The selenium content in plants was high: from 2 to 32.5 ppm, but showed no correlation with soil pH or with total Se content in soil. Both species were also analyzed for their sixteen element contents. They contained high concentrations of Al, Fe, Ni, Co and Cr. The higher Se contents were found in plants presenting the lower Al, Fe, As and Mn levels. In Trifolium, the Se content showed a negative correlation with the concentration of Al (r=−0.44), of Fe (r=−0.47) and of As (r=−0.47). Moreover, there were high positive correlations between the levels of Al, Fe and As in both species. A positive correlation between the concentration of Se and P was seen for Helminthia, but for Trifolium, the lower concentrations of Se were noted both in samples that had the lower and the higher levels of P. Some other positive correlations were noted between Se concentrations and those of Co, Mo or Mn when it is present in relatively high amounts in the plant species.
    Notes: Résumé Nous avons analysé la teneur en sélénium de sols argileux de la région de La Roche-Posay ainsi que celle deHelminthia echioïdes etTrifolium repens qui s'y développent. Sur trente emplacements, la concentration en Se total du sol varie de 1,7 à 4,5 ppm et le pH oscille de 6,1 à 7,2. La teneur en sélénium des plantes est élevée: de l'ordre de 2 à 32,5 ppm, mais aucune corrélation n'a été notée entre ces valeurs et d'une part le pH du sol ou d'autre part la teneur totale en Se du sol. Seize éléments minéraux ont également été dosés. Les deux espèces présentent des concentrations élevées en Al, Fe, Ni, Co et Cr. Les Teneurs les plus fortes en Se ont été retrouées dans les plantes possédant les taux les plus bas en Al, Fe, As et Mn. Chez Trifolium, une corrélation négative est observée entre la concentration en Se et celle en Al (r=−0,44), en Fe (r=−0,47) et en As (r=−0,47). Par ailleurs, des corrélations positives sont obtenues entre les teneurs en Al, Fe et As chez les deux espèces. Une corrélation positive existe entre la teneur en Se et celle en P chez Helminthia, mais chez Trifolium les plus faibles concentrations en Se se retrouvent à la fois dans les échantillons présentant les niveaux les plus faibles et les plus forts en P. Chez l'une ou l'autre des espèces étudiées, des corrélations positives apparaissent entre les teneurs en Se et celles en Co, Mo ou même Mn lorsqu'il est présent à des taux relativement élevés dans la plante.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 13
    ISSN: 1573-5117
    Keywords: Chlorophyll ; Simulation ; Trichromatic equations ; Correlation ; multiple t-comparisons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A numerical simulation of trichromatic pigment equations is made with the aid of a computer utility program. Significant quantitative differences in the estimates of pigment concentration result from using different sets of trichromatic equations. Estimates of chlorophylls a, b, and c were found highly correlated with the application of the equations, even though the absorbance values used as input for the stimulation are not correlated.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 14
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 24 (1986), S. 169-173 
    ISSN: 1741-0444
    Keywords: Correlation ; Visual evoked potential ; Visual pathway ; Weighting matrix
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Visual evoked potentials (VEPs) were measured using 19 electrodes attached to the scalps of five normal human subjects during stimulations of the full-field and hemifield chequerboard pattern reversal. These signals were analysed by a new method based on the time locus of the potential distribution centre, where this locus was computed from the spatial potential distribution using the weighting matrix and maximum mean cross-correlation criteria. The results showed that the loci of normal subjects are similar, with an average correlation of 0·87. The loci produced in the left hemifield stimulation were different from the loci produced during the right hemifield stimulation, with a correlation of −0·66. Experimental results from four cats showed significant changes of the time loci after surgical division of the visual path-ways.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 15
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 21 (1983), S. 149-157 
    ISSN: 1741-0444
    Keywords: Acceleration ; Concussion ; Correlation ; Evoked potential ; Latency ; Neurophysiology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Somatosensory evoked potentials (e.p.s) produced by stimulation of the dorsal columns were recorded from the cervicol medullary junction of adult rhesus monkeys, and were analysed using normalised cross-correlation functions (n.c.c.f.s.), simple peak detection and r.m.s. amplitude measurement. The n.c.c.f. provided measures of latency shift and waveshape change, while the more traditional peak-detection method provided measures of peak latency and peak amplitude. The results of these procedures were plotted as functions of time relative to a single, brief experimental manipulation (impact acceleration of the whole body). Analysis by means of the n.c.c.f. was found to be a versatile and effective technique the advantages of which include measurement of latency shifts with little contamination by moderate changes in waveshape, quantification of subtle waveshape changes and usefulness under a wide variety of noise conditions
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 16
    ISSN: 1612-1112
    Keywords: Retention index ; Structural increments ; Regression equations ; Correlation ; Physicochemical constants of hydrocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Retention parameters of different hydrocarbon classes were determined on non-polar and medium-polar stationary phases. The relationship between the retention indices, the physicochemical properties and the chemical structure of the solutes (samples) and solvents (liquid phases) was investigated.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 17
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 20 (1982), S. 357-360 
    ISSN: 1741-0444
    Keywords: Correlation ; Doppler ultrasound ; Event signal analysis ; Foetal heart rate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract An improved method for the determination of foetal heart rate from Doppler ultrasound signals is described and evaluated. It determines the most probable pulse interval from the recurrence times of multiple echoes generated by each cardiac pulse. The method, when optimised, is shown to offer an improvement over current systems, especially in reduced signal loss.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 18
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 25 (1987), S. 397-402 
    ISSN: 1741-0444
    Keywords: Correlation ; Electrodes ; Electrogastrogram ; Frequency ; Gastric electrical activity ; Phase angle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Several authors have reported measurements of the human electrogastrogram (EGG), both with intraluminal electrodes and with improved noninvasive techniques. These methods provide information about the existence and frequency of gastric electrical activity (GEA) which may aid in diagnosing tachygastria. However, none of these methods have provided information regarding the direction and velocity of propagation of GEA. Such information could help isolates such abnormalities as gastro-oesophageal and antral reflux and gastric stasis. To ascertain the reliability of the extracorporal measurements, a new intraluminal electrode assembly was developed. This probe measures GEA through the mucosa at several locations simultaneously; yielding frequency, direction of propagation and velocity of the electrical activity.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 27 (1989), S. 572-579 
    ISSN: 1741-0444
    Keywords: Cardiovascular ; Coherence ; Correlation ; Signal sampling ; Signal processing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Two algorithms, based on coherency and correlation functions, are proposed for estimating the signal-to-noise ratio of physiological signals including the effect of flicker noise. New sampling techniques based on converting a single continuous signal into two time series that satisfy the requirements of the algorithms are proposed. The algorithms are applied to a computer-generated signal and noise composite of known SNR, as well as to quasiperiodic left ventricular pressure (LVP) waveforms transduced from ten patients. Both coherency and correlation methods were used to estimate the known SNR of the computer-generated compsite, signal and noise to within ±5 per cent, for SNR values between 10 and 30 dB. When applied to LVP waveforms, the two methods gave SNR values which were almost identical. Flicker noise associated with the LVP waveforms was computed to be 14 dB higher than the white noise. It is concluded that flicker, or 1/f noise, which has been heretofore ignored in SNR calculations of pressure and flow signals, must now be included.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 24 (1986), S. 121-129 
    ISSN: 1741-0444
    Keywords: Correlation ; Foetal heart rate ; Modulus difference ; Ultrasonic foetal monitoring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Microprocessor-based correlation processing is now widely used for the estimation of foetal heart rate from ultrasonic Doppler signals. The paper describes a technique having a, similar performance, to correlation but which will run three times faster on a microprocessor without an onboard hardware multiplier. This speed improvement results from replacing each multiplication operation of the correlation algorithm with a subtraction and a modulus operation. The algorithm, is thus referred to as the modulus difference algorithm. Typical waveforms are presented illustrating the responses of the two processors to continuous wave Doppler foetal heart signals for both wide (50 Hz) and narrow (4 Hz) preprocessor bandwidths. A quantitative comparison is given of the performance of the two methods in estimating the period of a synthetic signal with additive white Gaussian noise. This simulation represents the wideband preprocessor case. A theoretical derivation of the outputs for the narrowband preprocessor case is given, and actual outputs are shown for comparison. A tutorial approach is adopted throughout the paper.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 21
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 26 (1988), S. 584-590 
    ISSN: 1741-0444
    Keywords: Correlation ; EEG ; EOG ; Models ; Ocular artefacts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract An investigation of ocular artefacts (OAs) in the human electroencephalogram (EEG) to quantify the effectiveness of OA removal and to find the most effective model for removing OAs online is described. In Part 1, the models used in the investigation are described and the data analysed. The analysis showed that the ‘true’ EEG exhibited a high degree of serial correlation and so the ordinary least-squares (OLS) method employed to remove OA was inefficient. Efficient alternative methods based on autoregressive models of the ‘true’ EEG are discussed. It is also shown that the EOGs are linearly dependent making some of them redundant. In Part 2, the models are compared.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...