Search results for "statistical"
showing 10 items of 4960 documents
Analyzing Protein-Protein Spatial-Temporal Dependencies from Image Sequences Using Fuzzy Temporal Random Sets
2008
Total Internal Reflection Fluorescence Microscopy (TIRFM) allows us to image fluorescenttagged proteins near the plasma membrane of living cells with high spatial-temporal resolution. Using TIRFM imaging of GFP-tagged clathrin endocytic proteins, areas of fluorescence are observed as overlapping spots of different sizes and durations. Standard procedures to measure protein-protein colocalization of dual labeled samples threshold the original graylevel images to segment areas covered by different proteins. This binary logic is not appropriate as it leaves a free tuning parameter which can influence the conclusions. Moreover, these procedures rely on simple statistical analysis based on corre…
Weighted Likelihood Function of Multiple Statistical Parameters to Retrieve 2D TRUS-MR Slice Correspondece for Prostate Biopsy
2012
International audience; This paper presents a novel method to identify the 2D axial Magnetic Resonance (MR) slice from a pre-acquired MR prostate volume that closely corresponds to the 2D axial Transrectal Ultrasound (TRUS) slice obtained during prostate biopsy. The shape-context representations of the segmented prostate contours in both the imaging modalities are used to establish point correspondences using Bhattacharyya distance. Thereafter, Chi-square distance is used to find the prostate shape similarities between the MR slices and the TRUS slice. Normalized mutual information and correlation coefficient between the TRUS and MR slices are computed to find the information theoretic simi…
Formal Group Laws for Affine Kac-Moody groups and group quantization
1987
We describe a method for obtaining Formal Group Laws from the structure constants of Affine Kac-Moody groups and then apply a group manifold quantization procedure which permits construction of physical representations by using only canonical structures on the group. As an intermediate step we get an explicit expression for two-cocycles on Loop Groups. The programme is applied to the AffineSU(2) group.
On a relation between massive Yang-Mills theories and dual string models
1983
The relations between mass terms in Yang-Mills theories, projective representations of the group of gauge transformations, boundary conditions on vector potentials and Schwinger terms in local charge algebra commutation relations are discussed. The commutation relations (with Schwinger terms) are similar to the current algebra commutation relations of the SU(N) extended dual string model.
Frequency of Twin Pregnancies Following Renal Transplantation
1994
Objective: To evaluate the incidence of twin pregnancy among renal-transplanted women.Methods: A retrospective review based on three national inquiries. A computer literature search of the Medline system was done. Only reports of series were included. For statistical analysis the probability of having a twin pregnancy was assumed to be 0.012.Main Outcome Measures: Incidence of twin pregnancy in women after renal transplantation.Results: There were 7 sets of twins among 153 pregnancies reported in the national inquiry group (4.57%). Thus, the overall incidence of twin pregnancy in these women was 1 in 22 pregnancies. The frequency of twinning in series reporting pregnancies after renal trans…
Prä- und postnatales Nierenscreening im Vergleich: eine Analyse von 34.450 Neugeborenen des Geburtenregisters Mainzer Modell
2002
Zielsetzung. Fehlbildungen des internen Urogenitalsystems sind haufig und stellen die zweithaufigste Organkategorie dar. Anhand des Mainzer Geburtenregisters werden populationsbezogene Pravalenzen von Nierenfehlbildungen, die Sensitivitat des pranatalen Ultraschalls und die Haufigkeit operationsbedurftiger Befunde ermittelt. Material und Methode. Im Zeitraum von 1990–2001 erhielten alle in Mainz geborenen Kinder neben einer klinischen Untersuchung eine Ultraschalluntersuchung der ableitenden Harnwege. Bei Totgeborenen, Spontanaborten (≥15. SSW) und induzierten Aborten wurden die Befunde der Pathologie in die Erfassung einbezogen. Seit 1996 (nach Einfuhrung des Fehlbildungsschalles in die Mu…
Sonographisches Screening von Nierenzellkarzinomen
2002
Die zunehmende Zahl kleiner und zufallig meist beim Ultraschall entdeckter Nierenzellkarzinome, wirft die Frage auf der Praktikabilitat und Effektivitat einer systematischen Fruherkennungsuntersuchung des Nierenzellkarzinoms mittels Sonographie. Ein 2-Jahres Fruherkennungsprogramm fur das Nierenzellkarzinom (NZK) wurde in den Stadten Mainz und Wuppertal errichtet und der Bevolkerung (Alter > 40 Jahre) kostenlos angeboten. Das Screening wurde in Kooperation mit niedergelassenen Internisten, Allgemeinmediziner und Urologen organisiert und durchgefuhrt. Das Screening beinhaltete eine kostenlose Ultraschalluntersuchung der Nieren, sowie eine Nachuntersuchung nach einem Jahr. Eine Referenzsonogr…
Risk assessment of component failure modes and human errors using a new FMECA approach: application in the safety analysis of HDR brachytherapy
2014
Failure mode, effects and criticality analysis (FMECA) is a safety technique extensively used in many different industrial fields to identify and prevent potential failures. In the application of traditional FMECA, the risk priority number (RPN) is determined to rank the failure modes; however, the method has been criticised for having several weaknesses. Moreover, it is unable to adequately deal with human errors or negligence. In this paper, a new versatile fuzzy rule-based assessment model is proposed to evaluate the RPN index to rank both component failure and human error. The proposed methodology is applied to potential radiological over-exposure of patients during high-dose-rate brach…
Factors Influencing the Choice of Higher Education Establishment for Marketing Strategies of Higher Education
2015
Abstract The world-wide competition of higher education programs makes education institutions to seek for most efficient ways to attract students. The presented academic research is devoted also to the issues on motives and influencing factors for the choice of study programs. The methods applied in the current paper are as follows: analysis of scientific publications, focus group discussions, surveys of possible future students. For the evaluation of different aspects of choice a scale of 1-10 was used. For the data analysis of the survey descriptive statistical analysis, cross tabulations and correlation analysis, as well as analysis of variance (ANOVA) and factor analysis were applied.
Correlation at Low Temperature: II. Asymptotics
2004
The present paper is a continuation of ref. 4, where the truncated two-point correlation function for a class of lattice spin systems was proved to have exponential decay at low temperature, under a weak coupling assumption. In this paper we compute the asymptotics of the correlation function as the temperature goes to zero. This paper thus extends ref. 3 in two directions: The Hamiltonian function is allowed to have several local minima other than a unique global minimum, and we do not require translation invariance of the Hamiltonian function. We are in particular able to handle spin systems on a general lattice.