WorldWideScience

Sample records for techniques regular staff

  1. Multimodal Authentication Techniques For Staff Identification And ...

    African Journals Online (AJOL)

    PROF. OLIVER OSUAGWA

    2014-12-01

    Dec 1, 2014 ... nt. Feasibilit y Study. Feasibility. Study. Report. Feasibility Study. System. Analysis and ... Write the Staff. Check Staff .... writing process which aids maintenance of the program .... business, engineering, science and computing.

  2. Training Senior Citizen Centers Staff in Blind Rehabilitation Techniques.

    Science.gov (United States)

    Asch, Celine

    1980-01-01

    The author discusses a project conducted in 1979 in which personnel from Arkansas Enterprises for the Blind trained staff members from community based programs for the elderly in techniques designed to involve and assist visually impaired senior citizens. (Author)

  3. A comparative study of job satisfaction among regular and staff on contract in the primary health care system in Delhi, India

    Directory of Open Access Journals (Sweden)

    Pawan Kumar

    2014-01-01

    Full Text Available Background: Job satisfaction is a pleasant emotional state associated with the appreciation of one′s work and contributes immensely to performance in an organization. The purpose of this study was to assess the comparative job satisfaction among regular and staff on contract in Government Primary Urban Health Centers in Delhi, India. Materials and Methods: The study was conducted in 2013, on a sample of 333 health care providers who were selected using a multistage random sampling technique. The sample included medical officers (MOs, auxiliary nurses and midwives (ANMs, pharmacists and laboratory technicians (LTs/laboratory assistants (LAs among regular and staff on contract. Analysis was done using SPSS version 18, and appropriate statistical tests were applied. Results: The job satisfaction for all the regular staff that is, MOs, ANMs, pharmacists, LAs, and LTs were relatively higher (3.3 ± 0.44 than the contract staff (2.7 ± 0.45 with ′t′value 10.54 (P < 0.01. The mean score for regular and contract MOs was 3.2 ± 0.46 and 2.7 ± 0.56, respectively, and the same trends were found between regular and ANMs on the contract which was 3.4 ± 0.30 and 2.7 ± 0.38, regular and pharmacists on the contract was 3.3 ± 0.50 and 2.8 ± 0.41, respectively. The differences between groups were significant with a P < 0.01. Conclusion: Overall job satisfaction level was relatively low in both regular and contract staff. The factors contributing to satisfaction level were privileges, interpersonal relations, working-environment, patient relationship, the organization′s facilities, career development, and the scarcity of human resources (HRs. Therefore, specific recommendations are suggested to policy makers to take cognizance of the scarcity of HRs and the on-going experimentation with different models under primary health care system.

  4. A regular yoga intervention for staff nurse sleep quality and work stress: a randomised controlled trial.

    Science.gov (United States)

    Fang, Ronghua; Li, Xia

    2015-12-01

    Although many studies have assessed the efficacy of yoga in older individuals, minimal research has focused on how nurses use yoga to improve sleep quality and to reduce work stress after work hours. We used the Pittsburgh Sleep Quality Index in Chinese and the Questionnaire on Medical Worker's Stress in Chinese to determine the impact of yoga on the quality of sleep and work stress of staff nurses employed by a general hospital in China. Disturbances in the circadian rhythm interrupt an individual's pattern of sleep. Convenient sampling method. One hundred and twenty nurses were randomised into two groups: a yoga group and a non-yoga group. The yoga group performed yoga more than two times every week for 50-60 minutes each time after work hours. The NG group did not participate in yoga. After six months, self-reported sleep quality and work stress were compared between the two groups, and then we used linear regression to confirm the independent factors related to sleep quality. Nurses in the yoga group had better sleep quality and lower work stress compared with nurses in the non-yoga group. The linear regression model indicated that nursing experience, age and yoga intervention were significantly related to sleep quality. Regular yoga can improve sleep quality and reduce work stress in staff nurses. This study provides evidence that hospital management should pay attention to nurse sleep quality and work stress, thereby taking corresponding measures to reduce work pressure and improve health outcomes. © 2015 John Wiley & Sons Ltd.

  5. Nonlocal Regularized Algebraic Reconstruction Techniques for MRI: An Experimental Study

    Directory of Open Access Journals (Sweden)

    Xin Li

    2013-01-01

    Full Text Available We attempt to revitalize researchers' interest in algebraic reconstruction techniques (ART by expanding their capabilities and demonstrating their potential in speeding up the process of MRI acquisition. Using a continuous-to-discrete model, we experimentally study the application of ART into MRI reconstruction which unifies previous nonuniform-fast-Fourier-transform- (NUFFT- based and gridding-based approaches. Under the framework of ART, we advocate the use of nonlocal regularization techniques which are leveraged from our previous research on modeling photographic images. It is experimentally shown that nonlocal regularization ART (NR-ART can often outperform their local counterparts in terms of both subjective and objective qualities of reconstructed images. On one real-world k-space data set, we find that nonlocal regularization can achieve satisfactory reconstruction from as few as one-third of samples. We also address an issue related to image reconstruction from real-world k-space data but overlooked in the open literature: the consistency of reconstructed images across different resolutions. A resolution-consistent extension of NR-ART is developed and shown to effectively suppress the artifacts arising from frequency extrapolation. Both source codes and experimental results of this work are made fully reproducible.

  6. Sparse regularization techniques provide novel insights into outcome integration processes.

    Science.gov (United States)

    Mohr, Holger; Wolfensteller, Uta; Frimmel, Steffi; Ruge, Hannes

    2015-01-01

    By exploiting information that is contained in the spatial arrangement of neural activations, multivariate pattern analysis (MVPA) can detect distributed brain activations which are not accessible by standard univariate analysis. Recent methodological advances in MVPA regularization techniques have made it feasible to produce sparse discriminative whole-brain maps with highly specific patterns. Furthermore, the most recent refinement, the Graph Net, explicitly takes the 3D-structure of fMRI data into account. Here, these advanced classification methods were applied to a large fMRI sample (N=70) in order to gain novel insights into the functional localization of outcome integration processes. While the beneficial effect of differential outcomes is well-studied in trial-and-error learning, outcome integration in the context of instruction-based learning has remained largely unexplored. In order to examine neural processes associated with outcome integration in the context of instruction-based learning, two groups of subjects underwent functional imaging while being presented with either differential or ambiguous outcomes following the execution of varying stimulus-response instructions. While no significant univariate group differences were found in the resulting fMRI dataset, L1-regularized (sparse) classifiers performed significantly above chance and also clearly outperformed the standard L2-regularized (dense) Support Vector Machine on this whole-brain between-subject classification task. Moreover, additional L2-regularization via the Elastic Net and spatial regularization by the Graph Net improved interpretability of discriminative weight maps but were accompanied by reduced classification accuracies. Most importantly, classification based on sparse regularization facilitated the identification of highly specific regions differentially engaged under ambiguous and differential outcome conditions, comprising several prefrontal regions previously associated with

  7. Telephone techniques and etiquette: a medical practice staff training tool.

    Science.gov (United States)

    Hills, Laura Sachs

    2007-01-01

    The telephone is usually the first contact a prospective or new patient has with a medical practice. It is also the method that existing patients and others commonly use to ask questions or convey information. At the same time, a telephone that rings off the hook can be one of the biggest drains on staff time and a source of tremendous frustration. This article suggests practical techniques for managing the medical practice telephone. It provides seven never-fail strategies for saving time on the phone while remaining courteous and attentive to callers. It offers tips to help readers avoid getting caught in an endless game of telephone tag. The article highlights strategies that work particularly well when placing calls and when dealing with a busy signal or voicemail system problem in the practice. It also describes the fine points for taking accurate and complete telephone messages without turning off callers or misleading them. This article further explores practical strategies for using and not abusing the hold button and offers additional tips for telephone equipment and accessories readers may find helpful. Finally, this article suggests guidelines for using an answering machine or voicemail system and provides a 25-question quiz to help readers assess their own telephone technique.

  8. Regularization Techniques for Linear Least-Squares Problems

    KAUST Repository

    Suliman, Mohamed

    2016-04-01

    Linear estimation is a fundamental branch of signal processing that deals with estimating the values of parameters from a corrupted measured data. Throughout the years, several optimization criteria have been used to achieve this task. The most astonishing attempt among theses is the linear least-squares. Although this criterion enjoyed a wide popularity in many areas due to its attractive properties, it appeared to suffer from some shortcomings. Alternative optimization criteria, as a result, have been proposed. These new criteria allowed, in one way or another, the incorporation of further prior information to the desired problem. Among theses alternative criteria is the regularized least-squares (RLS). In this thesis, we propose two new algorithms to find the regularization parameter for linear least-squares problems. In the constrained perturbation regularization algorithm (COPRA) for random matrices and COPRA for linear discrete ill-posed problems, an artificial perturbation matrix with a bounded norm is forced into the model matrix. This perturbation is introduced to enhance the singular value structure of the matrix. As a result, the new modified model is expected to provide a better stabilize substantial solution when used to estimate the original signal through minimizing the worst-case residual error function. Unlike many other regularization algorithms that go in search of minimizing the estimated data error, the two new proposed algorithms are developed mainly to select the artifcial perturbation bound and the regularization parameter in a way that approximately minimizes the mean-squared error (MSE) between the original signal and its estimate under various conditions. The first proposed COPRA method is developed mainly to estimate the regularization parameter when the measurement matrix is complex Gaussian, with centered unit variance (standard), and independent and identically distributed (i.i.d.) entries. Furthermore, the second proposed COPRA

  9. The growth regularity and detective technique of collapse column

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Z. [Xingtai Coal Mining Bureau (China)

    1997-12-01

    The paper summarizes the growth regularity and the related factors of collapse column in Duongpang Coal Mine, introduces the applicability of roadway explorations, drillings and geophysical prospecting methods, expounds how to select an economic and quick exploration method according to the characteristics of each method and difference geological conditions for detecting the place, shape, size and water-bearing property of collapse column. 4 figs.

  10. Perturbative n-Loop Renormalization by an Implicit Regularization Technique

    CERN Document Server

    Gobira, S R

    2001-01-01

    We construct a regularization independent procedure for implementing perturbative renormalization. An algebraic identity at the level of the internal lines of the diagrams is used which allows for the identification of counterterms in a purely algebraic way. Order by order in a perturbative expansion we automatically obtain in the process, finite contributions, local and nonlocal divergences. The notorious complications of overlapping divergences never enter and the corresponding counterterms arise automatically on the same footing as any other counterterm. The result of the present mathematical procedure is a considerable algebraic simplification which clarifies the connection between renormalization and counterterms in the Lagrangian.

  11. Ultrasonography-Guided Peripheral Intravenous Access: Regular Technique Versus Seldinger Technique in Patients with Difficult Vascular Access

    OpenAIRE

    2012-01-01

    We sought to compare ultrasonography (US)-guided peripheral intravenous (PIV) access by regular technique using standard length catheters with a Seldinger technique using 16-cm central venous catheters in a randomized trial of adult patients with difficult intravenous (IV) access. Patients were randomized into two groups: (1) An US-guided IV access obtained through a regular technique or (2) An US-guided IV access obtained through a Seldinger technique. Outcomes measured were IV access succes...

  12. The application of regularization technique based on partial optimization in the nearfield acoustic holography

    Institute of Scientific and Technical Information of China (English)

    HE Chundong; ZHANG Yongbin; BI Chuanxing; CHEN Xinzhao

    2012-01-01

    The regularization technique for stabilizing the reconstruction based on the nearfield acoustic holography (NAH) was investigated on the basis of the equivalent source method. In order to obtain higher regularization effect, a regularization method based on the idea of partial optimization was proposed, which inherits the advantages of the Tikhonov and another regularization method-truncated singular value decomposition (TSVD). Through the numerical simulation, it is proved that the proposed method is stabler than the Tikhonov, and more precise than the TSVD. Finally the validity and the feasibility of the proposed method are demonstrated by an experiment carried out in a semi-anechoic room with two speakers.

  13. The experimental localization of Aubry-Mather sets using regularization techniques inspired by viscosity theory.

    Science.gov (United States)

    Guzzo, Massimiliano; Bernardi, Olga; Cardin, Franco

    2007-09-01

    We provide a new method for the localization of Aubry-Mather sets in quasi-integrable two-dimensional twist maps. Inspired by viscosity theories, we introduce regularization techniques based on the new concept of "relative viscosity and friction," which allows one to obtain regularized parametrizations of invariant sets with irrational rotation number. Such regularized parametrizations allow one to compute a curve in the phase-space that passes near the Aubry-Mather set, and an invariant measure whose density allows one to locate the gaps on the curve. We show applications to the "golden" cantorus of the standard map as well as to a more general case.

  14. Performance index based learning controls for the partial non-regular systems using lifting technique

    Institute of Scientific and Technical Information of China (English)

    Shengyue YANG; Xiaoping FAN; Zhihua QU

    2009-01-01

    Deficiencies of the performance-based iterative learning control (ILC) for the non-regular systems are investigated in detail, then a faster control input updating and lifting technique is introduced in the design of performance index based ILCs for the partial non-regular systems. Two kinds of optimal ILCs based on different performance indices are considered. Finally, simulation examples are given to illustrate the feasibility of the proposed learning controls.

  15. The Jump Set under Geometric Regularization. Part 1: Basic Technique and First-Order Denoising

    KAUST Repository

    Valkonen, Tuomo

    2015-01-01

    © 2015 Society for Industrial and Applied Mathematics. Let u ∈ BV(Ω) solve the total variation (TV) denoising problem with L2-squared fidelity and data f. Caselles, Chambolle, and Novaga [Multiscale Model. Simul., 6 (2008), pp. 879-894] have shown the containment Hm-1 (Ju \\\\Jf) = 0 of the jump set Ju of u in that of f. Their proof unfortunately depends heavily on the co-area formula, as do many results in this area, and as such is not directly extensible to higher-order, curvature-based, and other advanced geometric regularizers, such as total generalized variation and Euler\\'s elastica. These have received increased attention in recent times due to their better practical regularization properties compared to conventional TV or wavelets. We prove analogous jump set containment properties for a general class of regularizers. We do this with novel Lipschitz transformation techniques and do not require the co-area formula. In the present Part 1 we demonstrate the general technique on first-order regularizers, while in Part 2 we will extend it to higher-order regularizers. In particular, we concentrate in this part on TV and, as a novelty, Huber-regularized TV. We also demonstrate that the technique would apply to nonconvex TV models as well as the Perona-Malik anisotropic diffusion, if these approaches were well-posed to begin with.

  16. Local and Non-local Regularization Techniques in Emission (PET/SPECT) Tomographic Image Reconstruction Methods.

    Science.gov (United States)

    Ahmad, Munir; Shahzad, Tasawar; Masood, Khalid; Rashid, Khalid; Tanveer, Muhammad; Iqbal, Rabail; Hussain, Nasir; Shahid, Abubakar; Fazal-E-Aleem

    2016-06-01

    Emission tomographic image reconstruction is an ill-posed problem due to limited and noisy data and various image-degrading effects affecting the data and leads to noisy reconstructions. Explicit regularization, through iterative reconstruction methods, is considered better to compensate for reconstruction-based noise. Local smoothing and edge-preserving regularization methods can reduce reconstruction-based noise. However, these methods produce overly smoothed images or blocky artefacts in the final image because they can only exploit local image properties. Recently, non-local regularization techniques have been introduced, to overcome these problems, by incorporating geometrical global continuity and connectivity present in the objective image. These techniques can overcome drawbacks of local regularization methods; however, they also have certain limitations, such as choice of the regularization function, neighbourhood size or calibration of several empirical parameters involved. This work compares different local and non-local regularization techniques used in emission tomographic imaging in general and emission computed tomography in specific for improved quality of the resultant images.

  17. Techniques of Learning: Self-Modification of Academic Behavior--Manual for Staff Members.

    Science.gov (United States)

    Handfield, Victoria; And Others

    The "Manual for Staff Members" describes the Techniques of Learning Program, a part of the Peer Environmental Analysts, Counselors, Educators (PEACE) Program at American University. PEACE is a large, student-operated peer counseling program that consists of six services and related academic courses. Techniques of Learning is a program that teaches…

  18. GRACE leakage error correction with regularization technique: Case studies in Greenland and Antarctica

    Science.gov (United States)

    Mu, Dapeng; Yan, Haoming; Feng, Wei; Peng, Peng

    2017-01-01

    Filtering is a necessary step in the Gravity Recovery and Climate Experiment (GRACE) data processing, but leads to signal leakage and attenuation obviously, and adversely affects the quality of global and regional mass change estimates. We propose to use the Tikhonov regularization technique with the L-curve method to solve a correction equation which can reduce the leakage error caused by filter involved in GRACE data processing. We first demonstrate that the leakage error caused by the Gaussian filter can be well corrected by our regularization technique with simulation studies in Greenland and Antarctica. Furthermore, our regularization technique can restore the spatial distribution of original mass changes. For example, after applying the regularization method to GRAEC data (2003-2012), we find that GRACE mass changes tend to move from interior to coastal area in Greenland, which are consistent with recent other studies. After being corrected for glacial isostatic adjustment (GIA) effect, our results show that the ice mass loss rates were 274 ± 30 and 107 ± 34 Gt/yr in Greenland and Antarctica from 2003 to 2012, respectively. And a 10 ± 4 Gt/yr increase rate in Greenland interior is also detected.

  19. Regularization Techniques for ECG Imaging during Atrial Fibrillation: A Computational Study

    Science.gov (United States)

    Figuera, Carlos; Suárez-Gutiérrez, Víctor; Hernández-Romero, Ismael; Rodrigo, Miguel; Liberos, Alejandro; Atienza, Felipe; Guillem, María S.; Barquero-Pérez, Óscar; Climent, Andreu M.; Alonso-Atienza, Felipe

    2016-01-01

    The inverse problem of electrocardiography is usually analyzed during stationary rhythms. However, the performance of the regularization methods under fibrillatory conditions has not been fully studied. In this work, we assessed different regularization techniques during atrial fibrillation (AF) for estimating four target parameters, namely, epicardial potentials, dominant frequency (DF), phase maps, and singularity point (SP) location. We use a realistic mathematical model of atria and torso anatomy with three different electrical activity patterns (i.e., sinus rhythm, simple AF, and complex AF). Body surface potentials (BSP) were simulated using Boundary Element Method and corrupted with white Gaussian noise of different powers. Noisy BSPs were used to obtain the epicardial potentials on the atrial surface, using 14 different regularization techniques. DF, phase maps, and SP location were computed from estimated epicardial potentials. Inverse solutions were evaluated using a set of performance metrics adapted to each clinical target. For the case of SP location, an assessment methodology based on the spatial mass function of the SP location, and four spatial error metrics was proposed. The role of the regularization parameter for Tikhonov-based methods, and the effect of noise level and imperfections in the knowledge of the transfer matrix were also addressed. Results showed that the Bayes maximum-a-posteriori method clearly outperforms the rest of the techniques but requires a priori information about the epicardial potentials. Among the purely non-invasive techniques, Tikhonov-based methods performed as well as more complex techniques in realistic fibrillatory conditions, with a slight gain between 0.02 and 0.2 in terms of the correlation coefficient. Also, the use of a constant regularization parameter may be advisable since the performance was similar to that obtained with a variable parameter (indeed there was no difference for the zero-order Tikhonov method

  20. Regularization Techniques for ECG Imaging during Atrial Fibrillation: a Computational Study

    Directory of Open Access Journals (Sweden)

    Carlos Figuera

    2016-10-01

    Full Text Available The inverse problem of electrocardiography is usually analyzed during stationary rhythms. However, the performance of the regularization methods under fibrillatory conditions has not been fully studied. In this work, we assessed different regularization techniques during atrial fibrillation (AF for estimating four target parameters, namely, epicardial potentials, dominant frequency (DF, phase maps, and singularity point (SP location. We use a realistic mathematical model of atria and torso anatomy with three different electrical activity patterns (i.e. sinus rhythm, simple AF and complex AF. Body surface potentials (BSP were simulated using Boundary Element Method and corrupted with white Gaussian noise of different powers. Noisy BSPs were used to obtain the epicardial potentials on the atrial surface, using fourteen different regularization techniques. DF, phase maps and SP location were computed from estimated epicardial potentials. Inverse solutions were evaluated using a set of performance metrics adapted to each clinical target. For the case of SP location, an assessment methodology based on the spatial mass function of the SP location and four spatial error metrics was proposed. The role of the regularization parameter for Tikhonov-based methods, and the effect of noise level and imperfections in the knowledge of the transfer matrix were also addressed. Results showed that the Bayes maximum-a-posteriori method clearly outperforms the rest of the techniques but requires a priori information about the epicardial potentials. Among the purely non-invasive techniques, Tikhonov-based methods performed as well as more complex techniques in realistic fibrillatory conditions, with a slight gain between 0.02 and 0.2 in terms of the correlation coefficient. Also, the use of a constant regularization parameter may be advisable since the performance was similar to that obtained with a variable parameter (indeed there was no difference for the zero

  1. Minimum divergence viscous flow simulation through finite difference and regularization techniques

    Science.gov (United States)

    Victor, Rodolfo A.; Mirabolghasemi, Maryam; Bryant, Steven L.; Prodanović, Maša

    2016-09-01

    We develop a new algorithm to simulate single- and two-phase viscous flow through a three-dimensional Cartesian representation of the porous space, such as those available through X-ray microtomography. We use the finite difference method to discretize the governing equations and also propose a new method to enforce the incompressible flow constraint under zero Neumann boundary conditions for the velocity components. Finite difference formulation leads to fast parallel implementation through linear solvers for sparse matrices, allowing relatively fast simulations, while regularization techniques used on solving inverse problems lead to the desired incompressible fluid flow. Tests performed using benchmark samples show good agreement with experimental/theoretical values. Additional tests are run on Bentheimer and Buff Berea sandstone samples with available laboratory measurements. We compare the results from our new method, based on finite differences, with an open source finite volume implementation as well as experimental results, specifically to evaluate the benefits and drawbacks of each method. Finally, we calculate relative permeability by using this modified finite difference technique together with a level set based algorithm for multi-phase fluid distribution in the pore space. To our knowledge this is the first time regularization techniques are used in combination with finite difference fluid flow simulations.

  2. Regularization techniques for PSF-matching kernels - I. Choice of kernel basis

    Science.gov (United States)

    Becker, A. C.; Homrighausen, D.; Connolly, A. J.; Genovese, C. R.; Owen, R.; Bickerton, S. J.; Lupton, R. H.

    2012-09-01

    We review current methods for building point spread function (PSF)-matching kernels for the purposes of image subtraction or co-addition. Such methods use a linear decomposition of the kernel on a series of basis functions. The correct choice of these basis functions is fundamental to the efficiency and effectiveness of the matching - the chosen bases should represent the underlying signal using a reasonably small number of shapes, and/or have a minimum number of user-adjustable tuning parameters. We examine methods whose bases comprise multiple Gauss-Hermite polynomials, as well as a form-free basis composed of delta-functions. Kernels derived from delta-functions are unsurprisingly shown to be more expressive; they are able to take more general shapes and perform better in situations where sum-of-Gaussian methods are known to fail. However, due to its many degrees of freedom (the maximum number allowed by the kernel size) this basis tends to overfit the problem and yields noisy kernels having large variance. We introduce a new technique to regularize these delta-function kernel solutions, which bridges the gap between the generality of delta-function kernels and the compactness of sum-of-Gaussian kernels. Through this regularization we are able to create general kernel solutions that represent the intrinsic shape of the PSF-matching kernel with only one degree of freedom, the strength of the regularization λ. The role of λ is effectively to exchange variance in the resulting difference image with variance in the kernel itself. We examine considerations in choosing the value of λ, including statistical risk estimators and the ability of the solution to predict solutions for adjacent areas. Both of these suggest moderate strengths of λ between 0.1 and 1.0, although this optimization is likely data set dependent. This model allows for flexible representations of the convolution kernel that have significant predictive ability and will prove useful in implementing

  3. Education of hand rubbing technique to prospective medical staff, employing UV-based digital imaging technology.

    Science.gov (United States)

    Lehotsky, Ákos; Szilágyi, László; Demeter-Iclănzan, Annamária; Haidegger, Tamás; Wéber, György

    2016-06-01

    The aim of this study was to objectively assess the hand hygiene performance of medical students. Hand rubbing technique was evaluated by employing innovative UV-light-based imaging technology, identifying patterns and trends in missed areas after applying WHO's six-step protocol. This specially designed hand hygiene education and assessment program targeted 1,344 medical students at two distant sites in Central Europe. Students were introduced to a short video, presenting the basics of hand hygiene, and then received further demonstration from professional trainers, focusing on the correct execution of WHO's six-step technique. To verify the acquired skill, participants rubbed their hands with UV-marked alcohol-based solution. Digital images of the hands were recorded under UV light, followed by computer evaluation and assessment. Immediate objective visual feedback was given to the participants showing missed areas on their hands. The statistical analysis of missed spots was based on retrospective expert-driven manual evaluation. Significant difference in rubbing quality was found between female and male participants [35.3% (CI 95%: 33-38%) versus 29.0% (CI 95%: 27-31%), p hands [43.4% (CI 95%: 39-48%) versus 34.9% (CI 95%: 32-38%), p = 0.002], and various zones of the hands' dorsal side. Based on the participants' feedback and the evaluation of the infection control specialists, it can be stated that the identification of typically missed patterns and the instant visual feedback have a vital role in improving the hand hygiene technique of prospective medical staff.

  4. The optimization of super-high resolution frequency measurement techniques based on phase quantization regularities between any frequencies.

    Science.gov (United States)

    Li, Zhiqi; Zhou, Wei; Zhou, Hui; Zhang, Xueping; Zhao, Jie

    2013-02-01

    Step phase quantization regularity between different nominal frequency signals is introduced in this paper. Based on this regularity, an optimized high resolution frequency measurement technique is presented. The key features and issues of phase quantization characteristics and measurements are described. Based on the relationship between the same or multiple nominal signals with a certain differences, the resolution of frequency measurements is developed and the range is widened. Several measurement results are provided to support the concepts with experimental evidence. The resolution of frequency measurement can reach 10(-12) (s(-1)) over a wide range or higher for specific frequency signals.

  5. Improving Conductivity Image Quality Using Block Matrix-based Multiple Regularization (BMMR Technique in EIT: A Simulation Study

    Directory of Open Access Journals (Sweden)

    Tushar Kanti Bera

    2011-06-01

    Full Text Available A Block Matrix based Multiple Regularization (BMMR technique is proposed for improving conductivity image quality in EIT. The response matrix (JTJ has been partitioned into several sub-block matrices and the highest eigenvalue of each sub-block matrices has been chosen as regularization parameter for the nodes contained by that sub-block. Simulated boundary data are generated for circular domain with circular inhomogeneity and the conductivity images are reconstructed in a Model Based Iterative Image Reconstruction (MoBIIR algorithm. Conductivity images are reconstructed with BMMR technique and the results are compared with the Single-step Tikhonov Regularization (STR and modified Levenberg-Marquardt Regularization (LMR methods. It is observed that the BMMR technique reduces the projection error and solution error and improves the conductivity reconstruction in EIT. Result show that the BMMR method also improves the image contrast and inhomogeneity conductivity profile and hence the reconstructed image quality is enhanced. ;doi:10.5617/jeb.170 J Electr Bioimp, vol. 2, pp. 33-47, 2011

  6. Oil Spill Detection and Tracking Using Lipschitz Regularity and Multiscale Techniques in Synthetic Aperture Radar Imagery

    Science.gov (United States)

    Ajadi, O. A.; Meyer, F. J.

    2014-12-01

    Automatic oil spill detection and tracking from Synthetic Aperture Radar (SAR) images is a difficult task, due in large part to the inhomogeneous properties of the sea surface, the high level of speckle inherent in SAR data, the complexity and the highly non-Gaussian nature of amplitude information, and the low temporal sampling that is often achieved with SAR systems. This research presents a promising new oil spill detection and tracking method that is based on time series of SAR images. Through the combination of a number of advanced image processing techniques, the develop approach is able to mitigate some of these previously mentioned limitations of SAR-based oil-spill detection and enables fully automatic spill detection and tracking across a wide range of spatial scales. The method combines an initial automatic texture analysis with a consecutive change detection approach based on multi-scale image decomposition. The first step of the approach, a texture transformation of the original SAR images, is performed in order to normalize the ocean background and enhance the contrast between oil-covered and oil-free ocean surfaces. The Lipschitz regularity (LR), a local texture parameter, is used here due to its proven ability to normalize the reflectivity properties of ocean water and maximize the visibly of oil in water. To calculate LR, the images are decomposed using two-dimensional continuous wavelet transform (2D-CWT), and transformed into Holder space to measure LR. After texture transformation, the now normalized images are inserted into our multi-temporal change detection algorithm. The multi-temporal change detection approach is a two-step procedure including (1) data enhancement and filtering and (2) multi-scale automatic change detection. The performance of the developed approach is demonstrated by an application to oil spill areas in the Gulf of Mexico. In this example, areas affected by oil spills were identified from a series of ALOS PALSAR images

  7. System identification via sparse multiple kernel-based regularization using sequential convex optimization techniques

    DEFF Research Database (Denmark)

    Chen, Tianshi; Andersen, Martin Skovgaard; Ljung, Lennart;

    2014-01-01

    Model estimation and structure detection with short data records are two issues that receive increasing interests in System Identification. In this paper, a multiple kernel-based regularization method is proposed to handle those issues. Multiple kernels are conic combinations of fixed kernels...

  8. Combined statistical regularization and experiment-design-theory-based nonlinear techniques for extended objects imaging from remotely sensed data

    Science.gov (United States)

    Kostenko, Yuri T.; Shkvarko, Yuri V.

    1994-06-01

    The aim of this presentation is to address a new theoretic approach to the problem of the development of remote sensing imaging (RSI) nonlinear techniques that exploit the idea of fusion the experiment design and statistical regularization theory-based methods for inverse problems solution optimal/suboptimal in the mixed Bayesian-regularization setting. The basic purpose of such the information fusion-based methodology is twofold, namely, to design the appropriate system- oriented finite-dimensional model of the RSI experiment in the terms of projection schemes for wavefield inversion problems, and to derive the two-stage estimation techniques that provide the optimal/suboptimal restoration of the power distribution in the environment from the limited number of the wavefield measurements. We also discuss issues concerning the available control of some additional degrees of freedom while such an RSI experiment is conducted.

  9. Fabrication and investigation of regular arrays of Fe, Ni and Co nanowires using template synthesizing technique

    Energy Technology Data Exchange (ETDEWEB)

    Winkler, Nina; Lei, Yong; Wilde, Gerhard [Institute of Materials Physics and Center for Nanotechnology, University of Muenster, 48149 Muenster (Germany)

    2011-07-01

    Regular arrays of magnetic nanowires with a high aspect ratio have possible applications in high density magnetic recording media. Basic knowledge about magnetism may be obtained from these nanowire arrays as transition of multi-domain to single-domain wires occurs at the nanoscale. Modified Porous Alumina Membranes (PAMs) with pore diameters from 20 to 80 nm are well suited as templates for electrodeposition due to their high pore regularity. The pores of the PAM were filled with nickel, iron, cobalt, and multilayer structures of these metals, resulting in different metallic nanowire arrays. The deposition conditions for growing metallic nanowires are investigated in detail. The homogeneous structure and morphology of the template-prepared nanowire arrays is observed by SEM and TEM. The TEM and X-ray measurements indicate that the crystalline structure is either polycrystalline or amorphous depending on the deposition conditions. The magnetic properties of the nanowire arrays are investigated with vibrating sample magnetometry, which shows a preferential direction of magnetization along the wire axis due to the high aspect ratio of the nanowires. The wire interaction in the array is observed qualitatively with magnetic force microscopy.

  10. Fast local trust region technique for diffusion tensor registration using exact reorientation and regularization.

    Science.gov (United States)

    Li, Junning; Shi, Yonggang; Tran, Giang; Dinov, Ivo; Wang, Danny J J; Toga, Arthur

    2014-05-01

    Diffusion tensor imaging is widely used in brain connectivity research. As more and more studies recruit large numbers of subjects, it is important to design registration methods which are not only theoretically rigorous, but also computationally efficient. However, the requirement of reorienting diffusion tensors complicates and considerably slows down registration procedures, due to the correlated impacts of registration forces at adjacent voxel locations. Based on the diffeomorphic Demons algorithm (Vercauteren , 2009), we propose a fast local trust region algorithm for handling inseparable registration forces for quadratic energy functions. The method guarantees that, at any time and at any voxel location, the velocity is always within its local trust region. This local regularization allows efficient calculation of the transformation update with numeric integration instead of completely solving a large linear system at every iteration. It is able to incorporate exact reorientation and regularization into the velocity optimization, and preserve the linear complexity of the diffeomorphic Demons algorithm. In an experiment with 84 diffusion tensor images involving both pair-wise and group-wise registrations, the proposed algorithm achieves better registration in comparison with other methods solving large linear systems (Yeo , 2009). At the same time, this algorithm reduces the computation time and memory demand tenfold.

  11. Background field removal technique using regularization enabled sophisticated harmonic artifact reduction for phase data with varying kernel sizes.

    Science.gov (United States)

    Kan, Hirohito; Kasai, Harumasa; Arai, Nobuyuki; Kunitomo, Hiroshi; Hirose, Yasujiro; Shibamoto, Yuta

    2016-09-01

    An effective background field removal technique is desired for more accurate quantitative susceptibility mapping (QSM) prior to dipole inversion. The aim of this study was to evaluate the accuracy of regularization enabled sophisticated harmonic artifact reduction for phase data with varying spherical kernel sizes (REV-SHARP) method using a three-dimensional head phantom and human brain data. The proposed REV-SHARP method used the spherical mean value operation and Tikhonov regularization in the deconvolution process, with varying 2-14mm kernel sizes. The kernel sizes were gradually reduced, similar to the SHARP with varying spherical kernel (VSHARP) method. We determined the relative errors and relationships between the true local field and estimated local field in REV-SHARP, VSHARP, projection onto dipole fields (PDF), and regularization enabled SHARP (RESHARP). Human experiment was also conducted using REV-SHARP, VSHARP, PDF, and RESHARP. The relative errors in the numerical phantom study were 0.386, 0.448, 0.838, and 0.452 for REV-SHARP, VSHARP, PDF, and RESHARP. REV-SHARP result exhibited the highest correlation between the true local field and estimated local field. The linear regression slopes were 1.005, 1.124, 0.988, and 0.536 for REV-SHARP, VSHARP, PDF, and RESHARP in regions of interest on the three-dimensional head phantom. In human experiments, no obvious errors due to artifacts were present in REV-SHARP. The proposed REV-SHARP is a new method combined with variable spherical kernel size and Tikhonov regularization. This technique might make it possible to be more accurate backgroud field removal and help to achive better accuracy of QSM.

  12. Mapping of Primary Instructional Methods and Teaching Techniques for Regularly Scheduled, Formal Teaching Sessions in an Anesthesia Residency Program

    DEFF Research Database (Denmark)

    Vested Madsen, Matias; Macario, Alex; Yamamoto, Satoshi

    2016-01-01

    In this study, we examined the regularly scheduled, formal teaching sessions in a single anesthesiology residency program to (1) map the most common primary instructional methods, (2) map the use of 10 known teaching techniques, and (3) assess if residents scored sessions that incorporated active......; range, 0-9). Clinical applicability (85%) and attention grabbers (85%) were the 2 most common teaching techniques. Thirty-eight percent of the sessions defined learning objectives, and one-third of sessions engaged in active learning. The overall survey response rate equaled 42%, and passive sessions...... learning as higher quality than sessions with little or no verbal interaction between teacher and learner. A modified Delphi process was used to identify useful teaching techniques. A representative sample of each of the formal teaching session types was mapped, and residents anonymously completed a 5...

  13. Improved prediction of drug-target interactions using regularized least squares integrating with kernel fusion technique

    Energy Technology Data Exchange (ETDEWEB)

    Hao, Ming; Wang, Yanli, E-mail: ywang@ncbi.nlm.nih.gov; Bryant, Stephen H., E-mail: bryant@ncbi.nlm.nih.gov

    2016-02-25

    Identification of drug-target interactions (DTI) is a central task in drug discovery processes. In this work, a simple but effective regularized least squares integrating with nonlinear kernel fusion (RLS-KF) algorithm is proposed to perform DTI predictions. Using benchmark DTI datasets, our proposed algorithm achieves the state-of-the-art results with area under precision–recall curve (AUPR) of 0.915, 0.925, 0.853 and 0.909 for enzymes, ion channels (IC), G protein-coupled receptors (GPCR) and nuclear receptors (NR) based on 10 fold cross-validation. The performance can further be improved by using a recalculated kernel matrix, especially for the small set of nuclear receptors with AUPR of 0.945. Importantly, most of the top ranked interaction predictions can be validated by experimental data reported in the literature, bioassay results in the PubChem BioAssay database, as well as other previous studies. Our analysis suggests that the proposed RLS-KF is helpful for studying DTI, drug repositioning as well as polypharmacology, and may help to accelerate drug discovery by identifying novel drug targets. - Graphical abstract: Flowchart of the proposed RLS-KF algorithm for drug-target interaction predictions. - Highlights: • A nonlinear kernel fusion algorithm is proposed to perform drug-target interaction predictions. • Performance can further be improved by using the recalculated kernel. • Top predictions can be validated by experimental data.

  14. Fabrication of regular TiO2 nanoporous films derived by combining nanoimprint technique with sol-gel method.

    Science.gov (United States)

    Zhong, Peng; Que, Wenxiu; Zhang, Jin

    2010-11-01

    In this paper, honeycomb-like regular TiO2 nanoporous films deposited on different substrates including ITO glass and silicon wafer are fabricated by combining a nanoimprint technique with a sol-gel method. A novel soft polymer mold containing a thin layer of polymethylmethacrylate and a thicker layer of polydimethylsiloxane, which is obtained from an anodic aluminum oxide template, is carried out for the nanoimprint process. TiO2 precursor solution prepared by the sol-gel processing is used as the nanoimprinted material. After imprinting, the polydimethylsiloxane back layer is easily peeled off before the polymethylmethacrylate mold is chemically removed to avoid any demolding problem. The SEM images show that the honeycomb-like regular nanostructure of the initial anodic aluminum oxide template can be preserved completely on TiO2 via this method, and the XRD results indicate that there is a crystalline transition from amorphous to anatase of TiO2 after 450 degrees C heat treatment.

  15. Improving image quality in Electrical Impedance Tomography (EIT using Projection Error Propagation-based Regularization (PEPR technique: A simulation study

    Directory of Open Access Journals (Sweden)

    Tushar Kanti Bera

    2011-03-01

    Full Text Available A Projection Error Propagation-based Regularization (PEPR method is proposed and the reconstructed image quality is improved in Electrical Impedance Tomography (EIT. A projection error is produced due to the misfit of the calculated and measured data in the reconstruction process. The variation of the projection error is integrated with response matrix in each iterations and the reconstruction is carried out in EIDORS. The PEPR method is studied with the simulated boundary data for different inhomogeneity geometries. Simulated results demonstrate that the PEPR technique improves image reconstruction precision in EIDORS and hence it can be successfully implemented to increase the reconstruction accuracy in EIT.>doi:10.5617/jeb.158 J Electr Bioimp, vol. 2, pp. 2-12, 2011

  16. Teaching Methods and Techniques Used By Teaching Staff during Lectures As Seen By Candidate Teachers (The Example of Bayburt

    Directory of Open Access Journals (Sweden)

    Sema ALTUN YALÇIN

    2012-12-01

    Full Text Available The purpose of this study is to determine the extent to which teaching staff are using constructivist approach in teaching methods and techniques they employ during lectures. Sample group of the study is provided by 389 students, 190 of which are enrolled at Science Teaching Department and 199 of which are enrolled at Class Teaching Department of Bayburt Faculty of Education. Measuring device developed by (Sözbilir, Şenocak and Dilber, 2006 was used during the study. Measuring device, consisting of 28 items, was examined by experts in the area and reliability test was conducted. At the end of the study, it has been determined that candidate teachers do not sufficiently employ their activities based on constructivist approach in their teaching methods and techniques that they use during their lectures.

  17. Mapping of Primary Instructional Methods and Teaching Techniques for Regularly Scheduled, Formal Teaching Sessions in an Anesthesia Residency Program.

    Science.gov (United States)

    Vested Madsen, Matias; Macario, Alex; Yamamoto, Satoshi; Tanaka, Pedro

    2016-06-01

    In this study, we examined the regularly scheduled, formal teaching sessions in a single anesthesiology residency program to (1) map the most common primary instructional methods, (2) map the use of 10 known teaching techniques, and (3) assess if residents scored sessions that incorporated active learning as higher quality than sessions with little or no verbal interaction between teacher and learner. A modified Delphi process was used to identify useful teaching techniques. A representative sample of each of the formal teaching session types was mapped, and residents anonymously completed a 5-question written survey rating the session. The most common primary instructional methods were computer slides-based classroom lectures (66%), workshops (15%), simulations (5%), and journal club (5%). The number of teaching techniques used per formal teaching session averaged 5.31 (SD, 1.92; median, 5; range, 0-9). Clinical applicability (85%) and attention grabbers (85%) were the 2 most common teaching techniques. Thirty-eight percent of the sessions defined learning objectives, and one-third of sessions engaged in active learning. The overall survey response rate equaled 42%, and passive sessions had a mean score of 8.44 (range, 5-10; median, 9; SD, 1.2) compared with a mean score of 8.63 (range, 5-10; median, 9; SD, 1.1) for active sessions (P = 0.63). Slides-based classroom lectures were the most common instructional method, and faculty used an average of 5 known teaching techniques per formal teaching session. The overall education scores of the sessions as rated by the residents were high.

  18. -Regular Modules

    Directory of Open Access Journals (Sweden)

    Areej M. Abduldaim

    2013-01-01

    Full Text Available We introduced and studied -regular modules as a generalization of -regular rings to modules as well as regular modules (in the sense of Fieldhouse. An -module is called -regular if for each and , there exist and a positive integer such that . The notion of -pure submodules was introduced to generalize pure submodules and proved that an -module is -regular if and only if every submodule of is -pure iff   is a -regular -module for each maximal ideal of . Many characterizations and properties of -regular modules were given. An -module is -regular iff is a -regular ring for each iff is a -regular ring for finitely generated module . If is a -regular module, then .

  19. Encke's special perturbation technique associated with the KS regularized variables. I - Satellite motions in the earth's gravitational field with axial symmetry

    Science.gov (United States)

    Awad, Mervat El-Sayed

    1988-10-01

    A special perturbation technique of Encke type associated with the Kustaanheimo-Stiefel (KS) regularized variables is developed for satellite motions in the earth's gravitational field with axial symmetry. Its computational algorithm is of recursive nature and could be applied to any perturbed conic motion, whatever the number of the zonal harmonic coefficients may be. Applications of the algorithm are also included.

  20. STAFF ACTIVE AND REFLECTIVE LEARNING (ARL TO ENHANCE STUDENT MANAGEMENT

    Directory of Open Access Journals (Sweden)

    Tay Sing Leong

    2010-11-01

    Full Text Available The Staff Active Reflective Learning (ARL is a new scheme designed to enhance student management though regular get-togethers of a group of teaching staff. It provides a platform for staff to share issues related to teaching, and seek solutions. This addresses current and future challenges faced in classroom management. The implementation of the Staff ARL is one of the recent initiatives taken under a new approach to shared learning within the School of Electronic and Info-Comm Technology. It provides a platform for mentors to facilitate in developing fellow staff members through the provision of professional support, helping existing staff to learn and grow professionally. Insights into classroom management techniques are provided for new staff to apply while waiting to attend the formal Pedagogic Certification in Technical Education (a compulsory component for all staff. The Staff ARL fosters good working relationships, as staff can ‘chill out’ and be rewarded through the enrichment of knowledge, sharpening of capabilities, building of confidence, and growth of mutual support. The scheme received good feedback as it resulted in the creation of a range of purposeful learning tools and strategies for thedevelopment of problem solving skills, reflective thinking skills and awareness of upto-date classroom situations.

  1. Regular figures

    CERN Document Server

    Tóth, L Fejes; Ulam, S; Stark, M

    1964-01-01

    Regular Figures concerns the systematology and genetics of regular figures. The first part of the book deals with the classical theory of the regular figures. This topic includes description of plane ornaments, spherical arrangements, hyperbolic tessellations, polyhedral, and regular polytopes. The problem of geometry of the sphere and the two-dimensional hyperbolic space are considered. Classical theory is explained as describing all possible symmetrical groupings in different spaces of constant curvature. The second part deals with the genetics of the regular figures and the inequalities fo

  2. Regular growth combined with lateral etching in diamond deposited over silicon substrate by using hot filament chemical vapor deposition technique

    Science.gov (United States)

    Ali, M.; Ürgen, M.

    2013-05-01

    Hot filament chemical vapor deposition has proved to be an attractive method for growing diamond films with good quality and higher growth rate. Diamond films were produced at deposition parameters under which, it is possible to have regular growth combined with lateral etching (RGCLE). Fracture cross-section SEM images showed that RGCLE initiated over polycrystalline diamond film and proceeded by the growth of consecutive steps in each crystallite, which terminated with square/rectangle shaped facets. All the diamond films exhibit RGCLE but with different type of growth behavior. Present work discusses the cyclic formation of the steps in diamond crystallites and RGCLE modes. RGCLE in diamond film may find important applications where heat absorption and dissipation are key issues.

  3. Staff Association Cocktail

    CERN Multimedia

    Staff Association

    2017-01-01

    The Staff Association has been organising for many years a cocktail with delegates of the Member States participating in Finance Committees of March and September. This cocktail is held at the end of the day, after the Finance Committee meeting. This direct and regular communication helps establish an ongoing contact between the Staff Association and CERN Member States and, more recently, the Associate Member States. Ambassadors of the CERN Staff Association, who are Members of the Personnel, have the opportunity to meet their national delegation in an informal and friendly atmosphere. These exchanges, facilitated by the use of the national language, allow the personnel via the Staff Association to express its ideas and positions on current affairs and fundamental issues, and also to hear about those of the delegations in return.

  4. Subsurface classification of objects under turbid waters by means of regularization techniques applied to real hyperspectral data

    Science.gov (United States)

    Carpena, Emmanuel; Jiménez, Luis O.; Arzuaga, Emmanuel; Fonseca, Sujeily; Reyes, Ernesto; Figueroa, Juan

    2017-05-01

    Improved benthic habitat mapping is needed to monitor coral reefs around the world and to assist coastal zones management programs. A fundamental challenge to remotely sensed mapping of coastal shallow waters is due to the significant disparity in the optical properties of the water column caused by the interaction between the coast and the sea. The objects to be classified have weak signals that interact with turbid waters that include sediments. In real scenarios, the absorption and backscattering coefficients are unknown with different sources of variability (river discharges and coastal interactions). Under normal circumstances, another unknown variable is the depth of shallow waters. This paper presents the development of algorithms for retrieving information and its application to the classification and mapping of objects under coastal shallow waters with different unknown concentrations of sediments. A mathematical model that simplifies the radiative transfer equation was used to quantify the interaction between the object of interest, the medium and the sensor. The retrieval of information requires the development of mathematical models and processing tools in the area of inversion, image reconstruction and classification of hyperspectral data. The algorithms developed were applied to one set of real hyperspectral imagery taken in a tank filled with water and TiO2 that emulates turbid coastal shallow waters. Tikhonov method of regularization was used in the inversion process to estimate the bottom albedo of the water tank using a priori information in the form of stored spectral signatures, previously measured, of objects of interest.

  5. The Staff Association and you

    CERN Multimedia

    Association du personnel

    2013-01-01

    The Staff Association, your representative with the Management and the Member States The article VII 1.01 of the Staff Rules and Regulations (SR&R) provides that “the relations between the Director-General and the personnel shall be established either on an individual basis or on a collective basis with the Staff Association as intermediary”. This essential role of the Staff representatives, of being the spokesperson of the entire staff of the Organization vis-à-vis the Director-General and the Members States, is achieved through regular participation in the various joint advisory committees defined in the SR&R. The most important are the Standing Concertation Committee and the TREF, tripartite forum where your representatives meet with the Member States delegates, in the presence of the Management, to explain the position of the staff on the various issues concerning employment conditions. The Finance Committee also gives the opportunity to the Staff Association to ...

  6. Efficient ray tracing on 3D regular grids for fast generation of digitally reconstructed radiographs in iterative tomographic reconstruction techniques

    CERN Document Server

    Dittmann, Jonas

    2016-01-01

    Cone beam projection is an essential and particularly time consuming part of any iterative tomographic reconstruction algorithm. On current graphics hardware especially the amount and pattern of memory accesses is a limiting factor when read-only textures cannot be used. With the final objective of accelerating iterative reconstruction techniques, a non-oversampling Joseph-like raytracing projection algorithm for three dimensions featuring both a branchless sampling loop and a cache friendly memory access pattern is presented. An interpretation of the employed interpolation scheme is given with respect to the effective beam and voxel models implied. The method is further compared to existing techniques, and the modifications required to implement further voxel and beam shape models are outlined. Both memory access rates and total run time are benchmarked on a current consumer grade graphics processing unit and explicitly compared to the performance of a classic Digital Differential Analyzer (DDA) algorithm. T...

  7. Learning and performance outcomes of mental health staff training in de-escalation techniques for the management of violence and aggression.

    Science.gov (United States)

    Price, Owen; Baker, John; Bee, Penny; Lovell, Karina

    2015-06-01

    De-escalation techniques are a recommended non-physical intervention for the management of violence and aggression in mental health. Although taught as part of mandatory training for all National Health Service (NHS) mental health staff, there remains a lack of clarity around training effectiveness. To conduct a systematic review of the learning, performance and clinical safety outcomes of de-escalation techniques training. The review process involved a systematic literature search of 20 electronic databases, eligibility screening of results, data extraction, quality appraisal and data synthesis. A total of 38 relevant studies were identified. The strongest impact of training appears to be on de-escalation-related knowledge, confidence to manage aggression and deescalation performance (although limited to artificial training scenarios). No strong conclusions could be drawn about the impact of training on assaults, injuries, containment and organisational outcomes owing to the low quality of evidence and conflicting results. It is assumed that de-escalation techniques training will improve staff's ability to de-escalate violent and aggressive behaviour and improve safety in practice. There is currently limited evidence that this training has these effects. © The Royal College of Psychiatrists 2015.

  8. Construction of a Scale-Questionnaire on the Attitude of the Teaching Staff as Opposed to the Educative Innovation by Means of Techniques of Cooperative Work (CAPIC

    Directory of Open Access Journals (Sweden)

    Joan Andrés Traver Martí

    2007-05-01

    Full Text Available In the present work the construction process of a scale-questionnaire is described to measure the attitude of the teaching staff as opposed to the educational innovation by means of techniques of cooperative work (CAPIC.  In order to carry out its design and elaboration we need on the one hand a model of analysis of the attitudes and an instrument of measurement of the same ones capable of guiding its practical dynamics.  The Theory of the Reasoned Action of Fisbhein and Ajzen (1975, 1980 and the summative scales (Likert have fulfilled, in both cases, this paper.

  9. Organizational commitment and intrinsic motivation of regular and contractual primary health care providers

    Directory of Open Access Journals (Sweden)

    Pawan Kumar

    2016-01-01

    Full Text Available Background: Motivated and committed employees deliver better health care, which results in better outcomes and higher patient satisfaction. Objective: To assess the Organizational Commitment and Intrinsic Motivation of Primary Health Care Providers (HCPs in New Delhi, India. Materials and Methods: Study was conducted in 2013 on a sample of 333 HCPs who were selected using multistage stage random sampling technique. The sample includes medical officers, auxiliary nurses and midwives, and pharmacists and laboratory technicians/assistants among regular and contractual staff. Data were collected using the pretested structured questionnaire for organization commitment (OC, job satisfiers, and intrinsic job motivation. Analysis was done by using SPSS version 18 and appropriate statistical tests were applied. Results: The mean score for OC for entire regular staff is 1.6 ± 0.39 and contractual staff is 1.3 ± 0.45 which has statistically significant difference (t = 5.57; P = 0.00. In both regular and contractual staff, none of them show high emotional attachment with the organization and does not feel part of the family in the organization. Contractual staff does not feel proud to work in a present organization for rest of their career. Intrinsic motivation is high in both regular and contractual groups but intergroup difference is significant (t = 2.38; P < 0.05. Contractual staff has more dissatisfier than regular, and the difference is significant (P < 0.01. Conclusion: Organizational commitment and intrinsic motivation of contractual staff are lesser than the permanent staff. Appropriate changes are required in the predictors of organizational commitment and factors responsible for satisfaction in the organization to keep the contractual human resource motivated and committed to the organization.

  10. Adaptive regularization

    DEFF Research Database (Denmark)

    Hansen, Lars Kai; Rasmussen, Carl Edward; Svarer, C.

    1994-01-01

    Regularization, e.g., in the form of weight decay, is important for training and optimization of neural network architectures. In this work the authors provide a tool based on asymptotic sampling theory, for iterative estimation of weight decay parameters. The basic idea is to do a gradient descent...... in the estimated generalization error with respect to the regularization parameters. The scheme is implemented in the authors' Designer Net framework for network training and pruning, i.e., is based on the diagonal Hessian approximation. The scheme does not require essential computational overhead in addition...... to what is needed for training and pruning. The viability of the approach is demonstrated in an experiment concerning prediction of the chaotic Mackey-Glass series. The authors find that the optimized weight decays are relatively large for densely connected networks in the initial pruning phase, while...

  11. Staff Association

    CERN Multimedia

    Staff Association

    2014-01-01

    Remove of the staff association office   The Staff Association offices are going to be renovated during the coming four months, February to May 2014. The physical move from our current premises 64/R-002 to our temporary office in  510/R-010 will take place on Friday January 31st, so the Secretariat will be closed on that day. Hence, from Monday February 3rd until the end of May 2014 the Staff Association Secretariat will be located in 510/R-010 (entrance just across the CERN Printshop).    

  12. Regular polytopes

    CERN Document Server

    Coxeter, H S M

    1973-01-01

    Polytopes are geometrical figures bounded by portions of lines, planes, or hyperplanes. In plane (two dimensional) geometry, they are known as polygons and comprise such figures as triangles, squares, pentagons, etc. In solid (three dimensional) geometry they are known as polyhedra and include such figures as tetrahedra (a type of pyramid), cubes, icosahedra, and many more; the possibilities, in fact, are infinite! H. S. M. Coxeter's book is the foremost book available on regular polyhedra, incorporating not only the ancient Greek work on the subject, but also the vast amount of information

  13. [Demands on professional nursing staff in institutions for dialysis from the view of male and female patients--the results of a survey by means of Critical Incident Technique].

    Science.gov (United States)

    Reuschenbach, Bernd; Mohr, Tina

    2005-04-01

    Contemporary models of competence in nursing are usually based on the questioning of nursing staff and therefore reflect their professional self-image. Our research focuses on the views of male and female patients on the relevant competencies of professional nursing staff. The "Critical Incident Techniqu" (CIT) (Flanagan, 1954) was applied to reveal relevant demands according to the patients' point of view. This technique has proven to be a suitable method for the reflection of nursing practice in this field of research and has provided realistic descriptions of staff behaviour. Nursing in the field of dialysis was chosen because of the specialized qualifications on staff needed and the high expectations assumed in this care. The CIT-interviews of one female and five male patients were transcribed and the content was analysed. Two main fields of demands were identified: "soft skills" and "hard skills". The patients especially stressed the demands on communicative and empathic competence ("soft skills"). Further research may be useful to validate the results with a larger sample.

  14. STAFF NEEDED

    CERN Multimedia

    2001-01-01

    The English National Programme, part of the Lycée International de Ferney-Voltaire (France) needs the following staff for September 2001: A part-time teacher of primary English The post involves teaching the English curriculum to pupils who are within the French educational system: Classes take place on Tuesday afternoons at the Lycée, Team spirit necessary as teachers work as a team, Induction & training are offered. A part time teacher of senior secondary history-geography in English A part time teacher of secondary mathematics in English Teachers must be mother-tongue English speakers and have a relevant degree and/or teaching qualification. For the history-geography post, either history or geography degrees are acceptable. Please send your c.v. and a letter of application to Peter Woodburn, Head, English National Programme, Lycée International, 01216 Ferney-Voltaire, France. (Email: engnat@hotmail.com) Telephone 04 50 40 82 66 for further details of posts. Ple...

  15. Multipliers: comparison of Fourier transformation based method and Synopsys design technique for up to 32 bits inputs in regular and saturation arithmetics

    OpenAIRE

    Gorodecky, Danila

    2016-01-01

    The technique for hardware multiplication based upon Fourier transformation has been introduced. The technique has the highest efficiency on multiplication units with up to 8 bit range. Each multiplication unit is realized on base of the minimized Boolean functions. Experimental data showed that this technique the multiplication process speed up to 20% higher for 2-8 bit range of input operands and up to 3% higher for 8-32 bit range of input operands than analogues designed by Synopsys techni...

  16. On Weak Regular *-semigroups

    Institute of Scientific and Technical Information of China (English)

    Yong Hua LI; Hai Bin KAN; Bing Jun YU

    2004-01-01

    In this paper, a special kind of partial algebras called projective partial groupoids is defined.It is proved that the inverse image of all projections of a fundamental weak regular *-semigroup under the homomorphism induced by the maximum idempotent-separating congruence of a weak regular *-semigroup has a projective partial groupoid structure. Moreover, a weak regular *-product which connects a fundamental weak regular *-semigroup with corresponding projective partial groupoid is defined and characterized. It is finally proved that every weak regular *-product is in fact a weak regular *-semigroup and any weak regular *-semigroup is constructed in this way.

  17. Modular Regularization Algorithms

    DEFF Research Database (Denmark)

    Jacobsen, Michael

    2004-01-01

    The class of linear ill-posed problems is introduced along with a range of standard numerical tools and basic concepts from linear algebra, statistics and optimization. Known algorithms for solving linear inverse ill-posed problems are analyzed to determine how they can be decomposed into indepen......The class of linear ill-posed problems is introduced along with a range of standard numerical tools and basic concepts from linear algebra, statistics and optimization. Known algorithms for solving linear inverse ill-posed problems are analyzed to determine how they can be decomposed...... into independent modules. These modules are then combined to form new regularization algorithms with other properties than those we started out with. Several variations are tested using the Matlab toolbox MOORe Tools created in connection with this thesis. Object oriented programming techniques are explained...... and used to set up the illposed problems in the toolbox. Hereby, we are able to write regularization algorithms that automatically exploit structure in the ill-posed problem without being rewritten explicitly. We explain how to implement a stopping criteria for a parameter choice method based upon...

  18. Regularization in Matrix Relevance Learning

    NARCIS (Netherlands)

    Schneider, Petra; Bunte, Kerstin; Stiekema, Han; Hammer, Barbara; Villmann, Thomas; Biehl, Michael

    2010-01-01

    A In this paper, we present a regularization technique to extend recently proposed matrix learning schemes in learning vector quantization (LVQ). These learning algorithms extend the concept of adaptive distance measures in LVQ to the use of relevance matrices. In general, metric learning can displa

  19. Combination of the clustered regularly interspaced short palindromic repeats (CRISPR)-associated 9 technique with the piggybac transposon system for mouse in utero electroporation to study cortical development.

    Science.gov (United States)

    Cheng, Man; Jin, Xubin; Mu, Lili; Wang, Fangyu; Li, Wei; Zhong, Xiaoling; Liu, Xuan; Shen, Wenchen; Liu, Ying; Zhou, Yan

    2016-09-01

    In utero electroporation (IUE) is commonly used to study cortical development of cerebrum by downregulating or overexpressing genes of interest in neural progenitor cells (NPCs) of small mammals. However, exogenous plasmids are lost or diluted over time. Furthermore, gene knockdown based on short-hairpin RNAs may exert nonspecific effects that lead to aberrant neuronal migration. Genomic engineering by the clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated 9 (Cas9) system has great research and therapeutic potentials. Here we integrate the CRISPR/Cas9 components into the piggyBac (PB) transposon system (the CRISPR/Cas9-PB toolkit) for cortical IUEs. The mouse Sry-related HMG box-2 (Sox2) gene was selected as the target for its application. Most transduced cortical NPCs were depleted of SOX2 protein as early as 3 days post-IUE, whereas expressions of SOX1 and PAX6 remained intact. Furthermore, both the WT Cas9 and the D10A nickase mutant Cas9n showed comparable knockout efficiency. Transduced cortical cells were purified with fluorescence-activated cell sorting, and effective gene editing at the Sox2 loci was confirmed. Thus, application of the CRISPR/Cas9-PB toolkit in IUE is a promising strategy to study gene functions in cortical NPCs and their progeny. © 2016 Wiley Periodicals, Inc. © 2016 Wiley Periodicals, Inc.

  20. Elections to Staff Council

    CERN Multimedia

    Association du personnel

    2006-01-01

    The Staff Association will shortly be renewing the mandate of half of the Staff Council. This is an opportunity for you to become more directly involved in the Staff Association's work and help promote and defend the staff's interests and, more broadly, those of the Organization itself.

  1. Elections to Staff Council

    CERN Multimedia

    Association du personnel

    2006-01-01

    The Staff Association will shortly be renewing the mandate of half of the Staff Council. This is an opportunity for you to become more directly involved in the Staff Association's work and help promote and defend the staff's interests and, more broadly, those of the Organization itself.

  2. NOETHERIAN GR-REGULAR RINGS ARE REGULAR

    Institute of Scientific and Technical Information of China (English)

    LIHUISHI

    1994-01-01

    It is proved that for a left Noetherian z-graded ring A,if every finitely generated graded A-module has finite projective dimension(i.e-,A is gr-regular)then every finitely generated A-module has finite projective dimension(i.e.,A is regular).Some applications of this result to filtered rings and some classical cases are also given.

  3. Staff Indiscipline and Productivity in the Public Sector in Nigeria ...

    African Journals Online (AJOL)

    Staff Indiscipline and Productivity in the Public Sector in Nigeria. ... source of concern to people (managers, bureaucrats, top public/civil servants and other ... regularize the payment of workers' salaries and wages to increase their productivity.

  4. Regular Expression Pocket Reference

    CERN Document Server

    Stubblebine, Tony

    2007-01-01

    This handy little book offers programmers a complete overview of the syntax and semantics of regular expressions that are at the heart of every text-processing application. Ideal as a quick reference, Regular Expression Pocket Reference covers the regular expression APIs for Perl 5.8, Ruby (including some upcoming 1.9 features), Java, PHP, .NET and C#, Python, vi, JavaScript, and the PCRE regular expression libraries. This concise and easy-to-use reference puts a very powerful tool for manipulating text and data right at your fingertips. Composed of a mixture of symbols and text, regular exp

  5. Dimensional regularization is generic

    CERN Document Server

    Fujikawa, Kazuo

    2016-01-01

    The absence of the quadratic divergence in the Higgs sector of the Standard Model in the dimensional regularization is usually regarded to be an exceptional property of a specific regularization. To understand what is going on in the dimensional regularization, we illustrate how to reproduce the results of the dimensional regularization for the $\\lambda\\phi^{4}$ theory in the more conventional regularization such as the higher derivative regularization; the basic postulate involved is that the quadratically divergent induced mass, which is independent of the scale change of the physical mass, is kinematical and unphysical. This is consistent with the derivation of the Callan-Symanzik equation, which is a comparison of two theories with slightly different masses, for the $\\lambda\\phi^{4}$ theory without encountering the quadratic divergence. We thus suggest that the dimensional regularization is generic in a bottom-up approach starting with a successful low-energy theory. We also define a modified version of t...

  6. Training staff to manage challenging behaviour

    NARCIS (Netherlands)

    Oorsouw, W.M.W.J. van; Embregts, P.J.C.M.; Bosman, A.M.T.; Jahoda, A.

    2010-01-01

    Background - A training package for staff working with clients presenting challenging behaviour was developed to (1) increase their knowledge regarding challenging behaviour, and (2) to improve the quality of physical intervention techniques. The latter aim was intended to reduce staff anxiety about

  7. Training Staff to Manage Challenging Behaviour

    Science.gov (United States)

    van Oorsouw, Wietske M. W. J.; Embregts, Petri J. C. M.; Bosman, Anna M. T.; Jahoda, Andrew

    2010-01-01

    Background: A training package for staff working with clients presenting challenging behaviour was developed to (1) increase their knowledge regarding challenging behaviour, and (2) to improve the quality of physical intervention techniques. The latter aim was intended to reduce staff anxiety about dealing with incidents and limit physical risk of…

  8. 油梨根腐病发病规律及防治技术%Occurrence regularity of Avocado Root Rot and Its Control Techniques

    Institute of Scientific and Technical Information of China (English)

    劳有德; 陈川

    2016-01-01

    油梨根腐病是油梨根部重要病害,近年来逐渐增多,严重时可造成油梨整株死亡,已成为油梨产业发展的重要病害。目前广西已发现有4种油梨根腐病,是较难防治的土传病害。重点介绍4种油梨根腐病的特点、发生、病因、症状等,从农业、物理、生物、化学防治方面介绍油梨根腐病的防治技术。%Avocado root rot is one of the most important root diseases on avocado, the disease is increasing in recent years. It can cause the death of the whole plant of avocado when this disease becomes seriously. The avocado root rot disease has become an important disease in avocado industry. Nowadays, there are four kinds of avocado root rot diseases are found in GuangXi Province. It is more difficult to control these soil borne diseases. This paper introduces the traits, causes, symptoms and occurrence of avocado root rot disease. And then, the control techniques for avocado root rot in agricultural, physical, biological and chemical control field and so on are introduced.

  9. E3 Staff Database

    Data.gov (United States)

    US Agency for International Development — E3 Staff database is maintained by E3 PDMS (Professional Development & Management Services) office. The database is Mysql. It is manually updated by E3 staff as...

  10. Decentralized Ground Staff Scheduling

    DEFF Research Database (Denmark)

    Sørensen, M. D.; Clausen, Jens

    2002-01-01

    Typically, ground staff scheduling is centrally planned for each terminal in an airport. The advantage of this is that the staff is efficiently utilized, but a disadvantage is that staff spends considerable time walking between stands. In this paper a decentralized approach for ground staff...... scheduling is investigated. The airport terminal is divided into zones, where each zone consists of a set of stands geographically next to each other. Staff is assigned to work in only one zone and the staff scheduling is planned decentralized for each zone. The advantage of this approach is that the staff...... work in a smaller area of the terminal and thus spends less time walking between stands. When planning decentralized the allocation of stands to flights influences the staff scheduling since the workload in a zone depends on which flights are allocated to stands in the zone. Hence solving the problem...

  11. When the nurse manager must help staff cope with change.

    Science.gov (United States)

    Davidhizar, R; Shearer, R; Dowd, S B

    1999-06-01

    The authors describe the dynamics of change, barriers and resistance to change, and provide techniques for assisting staff cope with change. The nurse manager should provide support during change, intervene when change is a surprise, help staff find challenge in change, encourage staff to have courage and stamina while coping with change, and foster teamwork. Using these techniques enables the manager and staff to view change as a challenge and an opportunity rather than a threat.

  12. Robust Sparse Analysis Regularization

    CERN Document Server

    Vaiter, Samuel; Dossal, Charles; Fadili, Jalal

    2011-01-01

    This paper studies the properties of L1-analysis regularization for the resolution of linear inverse problems. Most previous works consider sparse synthesis priors where the sparsity is measured as the L1 norm of the coefficients that synthesize the signal in a given dictionary. In contrast, the more general analysis regularization minimizes the L1 norm of the correlations between the signal and the atoms in the dictionary. The corresponding variational problem includes several well-known regularizations such as the discrete total variation and the fused lasso. We first prove that a solution of analysis regularization is a piecewise affine function of the observations. Similarly, it is a piecewise affine function of the regularization parameter. This allows us to compute the degrees of freedom associated to sparse analysis estimators. Another contribution gives a sufficient condition to ensure that a signal is the unique solution of the analysis regularization when there is no noise in the observations. The s...

  13. Meeting staff representatives of the European Agencies

    CERN Multimedia

    Staff Association

    2014-01-01

      The AASC (Assembly of Agency Staff Committee) held its 27th Meeting of the specialized European Agencies on 26 and 27 May on the premises of the OHIM (Office for Harmonization in the Internal Market) in Alicante, Spain. Two representatives of the CERN Staff Association, in charge of External Relations, attended as observers. This participation is a useful complement to regular contacts we have with FICSA (Federation of International Civil Servants' Associations), which groups staff associations of the UN Agencies, and the annual CSAIO conferences (Conference of Staff Associations of International Organizations), where each Autumn representatives of international organizations based in Europe meet to discuss themes of common interest to better promote and defend the rights of the international civil servants. All these meetings allow us to remain informed on items that are directly or indirectly related to employment and social conditions of our colleagues in other international and Europ...

  14. Regular expressions cookbook

    CERN Document Server

    Goyvaerts, Jan

    2009-01-01

    This cookbook provides more than 100 recipes to help you crunch data and manipulate text with regular expressions. Every programmer can find uses for regular expressions, but their power doesn't come worry-free. Even seasoned users often suffer from poor performance, false positives, false negatives, or perplexing bugs. Regular Expressions Cookbook offers step-by-step instructions for some of the most common tasks involving this tool, with recipes for C#, Java, JavaScript, Perl, PHP, Python, Ruby, and VB.NET. With this book, you will: Understand the basics of regular expressions through a

  15. Elections to Staff Council

    CERN Multimedia

    Association du personnel

    2007-01-01

    The Staff Association will shortly be renewing the mandate of half of the Staff Council. This is an opportunity for you to become more directly involved in the Staff Association’s work and help promote and defend the staff’s interests and, more broadly, those of the Organization itself.

  16. Elections to Staff Council

    CERN Multimedia

    Saff Association

    2013-01-01

    2013 Elections to Staff Council   Vote! Make your voice heard and be many to elect the new Staff Council. More details on the elections can be found on the Staff Association web site (https://ap-vote.web.cern.ch/elections-2013).   Timetable elections Monday 28 October to Monday 11 November, 12:00 am voting Monday 18 and Monday 25 November, publication of the results in Echo Tuesday 19 November, Staff Association Assizes Tuesday 3 December, first meeting of the new Staff Council and election of the new Executive Committee The voting procedure is monitored by the Election Committee.

  17. New Regularization Method in Electrical Impedance Tomography

    Institute of Scientific and Technical Information of China (English)

    侯卫东; 莫玉龙

    2002-01-01

    Image reconstruction in elecrical impedance tomography(EIT)is a highly ill-posed inverse problem,Regularization techniques must be used in order to solve the problem,In this paper,a new regularization method based on the spatial filtering theory is proposed.The new regularized reconstruction for EIT is independent of the estimation of impedance distribution,so it can be implemented more easily than the maxiumum a posteriori(MAP) method.The regularization level in our proposed method varies spatially so as to be suited to the correlation character of the object's impedance distribution.We implemented our regularization method with two dimensional computer simulations.The experimental results indicate that the quality of the reconstructed impedance images with the descibed regularization method based on spatial filtering theory is better than that with Tikhonov method.

  18. Total variation regularization with bounded linear variations

    Science.gov (United States)

    Makovetskii, Artyom; Voronin, Sergei; Kober, Vitaly

    2016-09-01

    One of the most known techniques for signal denoising is based on total variation regularization (TV regularization). A better understanding of TV regularization is necessary to provide a stronger mathematical justification for using TV minimization in signal processing. In this work, we deal with an intermediate case between one- and two-dimensional cases; that is, a discrete function to be processed is two-dimensional radially symmetric piecewise constant. For this case, the exact solution to the problem can be obtained as follows: first, calculate the average values over rings of the noisy function; second, calculate the shift values and their directions using closed formulae depending on a regularization parameter and structure of rings. Despite the TV regularization is effective for noise removal; it often destroys fine details and thin structures of images. In order to overcome this drawback, we use the TV regularization for signal denoising subject to linear signal variations are bounded.

  19. Regularization in kernel learning

    CERN Document Server

    Mendelson, Shahar; 10.1214/09-AOS728

    2010-01-01

    Under mild assumptions on the kernel, we obtain the best known error rates in a regularized learning scenario taking place in the corresponding reproducing kernel Hilbert space (RKHS). The main novelty in the analysis is a proof that one can use a regularization term that grows significantly slower than the standard quadratic growth in the RKHS norm.

  20. Regular database update logics

    NARCIS (Netherlands)

    Spruit, Paul; Wieringa, Roel; Meyer, John-Jules

    2001-01-01

    We study regular first-order update logic (FUL), which is a variant of regular dynamic logic in which updates to function symbols as well as to predicate symbols are possible. We fi1rst study FUL without making assumptions about atomic updates. Second, we look at relational algebra update logic (RAU

  1. The Penrose singularity theorem in regularity $C^{1,1}$

    CERN Document Server

    Kunzinger, Michael; Vickers, James A

    2015-01-01

    We extend the validity of the Penrose singularity theorem to spacetime metrics of regularity $C^{1,1}$. The proof is based on regularisation techniques, combined with recent results in low regularity causality theory.

  2. Singularities of slice regular functions

    CERN Document Server

    Stoppato, Caterina

    2010-01-01

    Beginning in 2006, G. Gentili and D.C. Struppa developed a theory of regular quaternionic functions with properties that recall classical results in complex analysis. For instance, in each Euclidean ball centered at 0 the set of regular functions coincides with that of quaternionic power series converging in the same ball. In 2009 the author proposed a classification of singularities of regular functions as removable, essential or as poles and studied poles by constructing the ring of quotients. In that article, not only the statements, but also the proving techniques were confined to the special case of balls centered at 0. In a subsequent paper, F. Colombo, G. Gentili, I. Sabadini and D.C. Struppa (2009) identified a larger class of domains, on which the theory of regular functions is natural and not limited to quaternionic power series. The present article studies singularities in this new context, beginning with the construction of the ring of quotients and of Laurent-type expansions at points other than ...

  3. Using Goal Setting, Task Clarification, and Feedback to Increase the Use of the Hands-Free Technique by Hospital Operating Room Staff

    Science.gov (United States)

    Cunningham, Thomas R; Austin, John

    2007-01-01

    We evaluated the effects of a behavioral treatment on the safe passing of sharp instruments using the hands-free technique among hospital operating room personnel during surgical procedures. Treatment consisted of participative goal setting, task clarification, and feedback. The average percentage of sharp instruments passed safely increased from 32% to 64% and 31% to 70% between baseline and treatment phases in the inpatient and outpatient surgery units, respectively. Five-month follow-up data suggested maintenance of treatment effects. These findings suggest the utility of organizational behavior management strategies in reducing risky behavior in hospital settings. PMID:18189098

  4. Regularization by External Variables

    DEFF Research Database (Denmark)

    Bossolini, Elena; Edwards, R.; Glendinning, P. A.

    2016-01-01

    Regularization was a big topic at the 2016 CRM Intensive Research Program on Advances in Nonsmooth Dynamics. There are many open questions concerning well known kinds of regularization (e.g., by smoothing or hysteresis). Here, we propose a framework for an alternative and important kind of regula...... of regularization, by external variables that shadow either the state or the switch of the original system. The shadow systems are derived from and inspired by various applications in electronic control, predator-prey preference, time delay, and genetic regulation....

  5. Web Accessibility Knowledge and Skills for Non-Web Library Staff

    Science.gov (United States)

    McHale, Nina

    2012-01-01

    Why do librarians and library staff other than Web librarians and developers need to know about accessibility? Web services staff do not--or should not--operate in isolation from the rest of the library staff. It is important to consider what areas of online accessibility are applicable to other areas of library work and to colleagues' regular job…

  6. Regularized maximum correntropy machine

    KAUST Repository

    Wang, Jim Jing-Yan

    2015-02-12

    In this paper we investigate the usage of regularized correntropy framework for learning of classifiers from noisy labels. The class label predictors learned by minimizing transitional loss functions are sensitive to the noisy and outlying labels of training samples, because the transitional loss functions are equally applied to all the samples. To solve this problem, we propose to learn the class label predictors by maximizing the correntropy between the predicted labels and the true labels of the training samples, under the regularized Maximum Correntropy Criteria (MCC) framework. Moreover, we regularize the predictor parameter to control the complexity of the predictor. The learning problem is formulated by an objective function considering the parameter regularization and MCC simultaneously. By optimizing the objective function alternately, we develop a novel predictor learning algorithm. The experiments on two challenging pattern classification tasks show that it significantly outperforms the machines with transitional loss functions.

  7. Regular Expression Containment

    DEFF Research Database (Denmark)

    Henglein, Fritz; Nielsen, Lasse

    2011-01-01

    We present a new sound and complete axiomatization of regular expression containment. It consists of the conventional axiomatiza- tion of concatenation, alternation, empty set and (the singleton set containing) the empty string as an idempotent semiring, the fixed- point rule E* = 1 + E × E......* for Kleene-star, and a general coin- duction rule as the only additional rule. Our axiomatization gives rise to a natural computational inter- pretation of regular expressions as simple types that represent parse trees, and of containment proofs as coercions. This gives the axiom- atization a Curry......-Howard-style constructive interpretation: Con- tainment proofs do not only certify a language-theoretic contain- ment, but, under our computational interpretation, constructively transform a membership proof of a string in one regular expres- sion into a membership proof of the same string in another regular expression. We...

  8. Energy functions for regularization algorithms

    Science.gov (United States)

    Delingette, H.; Hebert, M.; Ikeuchi, K.

    1991-01-01

    Regularization techniques are widely used for inverse problem solving in computer vision such as surface reconstruction, edge detection, or optical flow estimation. Energy functions used for regularization algorithms measure how smooth a curve or surface is, and to render acceptable solutions these energies must verify certain properties such as invariance with Euclidean transformations or invariance with parameterization. The notion of smoothness energy is extended here to the notion of a differential stabilizer, and it is shown that to void the systematic underestimation of undercurvature for planar curve fitting, it is necessary that circles be the curves of maximum smoothness. A set of stabilizers is proposed that meet this condition as well as invariance with rotation and parameterization.

  9. Physical model of dimensional regularization

    Energy Technology Data Exchange (ETDEWEB)

    Schonfeld, Jonathan F.

    2016-12-15

    We explicitly construct fractals of dimension 4-ε on which dimensional regularization approximates scalar-field-only quantum-field theory amplitudes. The construction does not require fractals to be Lorentz-invariant in any sense, and we argue that there probably is no Lorentz-invariant fractal of dimension greater than 2. We derive dimensional regularization's power-law screening first for fractals obtained by removing voids from 3-dimensional Euclidean space. The derivation applies techniques from elementary dielectric theory. Surprisingly, fractal geometry by itself does not guarantee the appropriate power-law behavior; boundary conditions at fractal voids also play an important role. We then extend the derivation to 4-dimensional Minkowski space. We comment on generalization to non-scalar fields, and speculate about implications for quantum gravity. (orig.)

  10. Regularities of Multifractal Measures

    Indian Academy of Sciences (India)

    Hun Ki Baek

    2008-05-01

    First, we prove the decomposition theorem for the regularities of multifractal Hausdorff measure and packing measure in $\\mathbb{R}^d$. This decomposition theorem enables us to split a set into regular and irregular parts, so that we can analyze each separately, and recombine them without affecting density properties. Next, we give some properties related to multifractal Hausdorff and packing densities. Finally, we extend the density theorem in [6] to any measurable set.

  11. On Regular Linear Relations

    Institute of Scientific and Technical Information of China (English)

    T. (A)LVAREZ

    2012-01-01

    For a closed linear relation in a Banach space the concept of regularity is introduced and studied.It is shown that many of the results of Mbekhta and other authors for operators remain valid in the context of multivalued linear operators.We also extend the punctured neighbourhood theorem for operators to linear relations and as an application we obtain a characterization of semiFredholm linear relations which are regular.

  12. Regular Expression Matching and Operational Semantics

    CERN Document Server

    Rathnayake, Asiri; 10.4204/EPTCS.62.3

    2011-01-01

    Many programming languages and tools, ranging from grep to the Java String library, contain regular expression matchers. Rather than first translating a regular expression into a deterministic finite automaton, such implementations typically match the regular expression on the fly. Thus they can be seen as virtual machines interpreting the regular expression much as if it were a program with some non-deterministic constructs such as the Kleene star. We formalize this implementation technique for regular expression matching using operational semantics. Specifically, we derive a series of abstract machines, moving from the abstract definition of matching to increasingly realistic machines. First a continuation is added to the operational semantics to describe what remains to be matched after the current expression. Next, we represent the expression as a data structure using pointers, which enables redundant searches to be eliminated via testing for pointer equality. From there, we arrive both at Thompson's lock...

  13. Elections to Staff Council

    CERN Multimedia

    Staff Association

    2011-01-01

    Elections to fill all seats in the Staff Council are being organized this month. The voting takes place from the 31st of October to the 14th of November, at noon. As you may have noted when reading Echo, many issues concerning our employment conditions are on the agenda of the coming months and will keep the next Staff Council very busy. So, make your voice heard and take part in the elections for a new Staff Council. By doing so, you will be encouraging the men and women who will be representing you over the next two years and they will doubtless appreciate your gratitude. Every member of the Staff Association will have received an email containing a link to the webpage which will allow voting. If you are a member of the Staff Association and you did not receive such an email, please contact the Staff Association secretariat (staff.association@cern.ch). Do not forget to vote * * * * * * * Vote Make your voice heard and be many to elect the new Staff Council. More details on the election...

  14. Internationalize Your Camp Staff.

    Science.gov (United States)

    Grier, Linda J.

    1986-01-01

    Provides a rationale for using international applicants for American summer camp positions and summarizes the services of organizations that screen, interview, and orient qualified applicants. Discusses contributions that international staff can make to a camp program with a global perspective and points out staff orientation and other practical…

  15. Education in geriatric medicine for community hospital staff.

    LENUS (Irish Health Repository)

    O'Hanlon, Shane

    2010-12-01

    Community hospitals provide many services for older people. They are mainly managed by nursing staff, with some specialist input. Little is known about education provided in these facilities. Most education in geriatric medicine is provided in hospitals, despite most elderly care being provided in the community. The authors surveyed senior nursing staff in Irish community hospitals to examine this area in more detail. Staff in all 18hospitals in the Health Service Executive (South) area were invited to participate. The response rate was 100%. Sixteen of the 18 respondents (89%) felt staff did not have enough education in geriatric medicine. Just over half of hospitals had regular staff education sessions in the area, with a minority of sessions led by a geriatrician, and none by GPs. Geriatrician visits were valued, but were requested only every 1-3 months. Staff identified challenging behaviour and dementia care as the areas that posed most difficulty.

  16. New staff contract policy

    CERN Multimedia

    HR Department

    2006-01-01

    Following discussion at TREF and on the recommendation of the Finance Committee, Council approved a new staff contract policy, which became effective on 1 January 2006. Its application is covered by a new Administrative Circular No. 2 (Rev. 3) 'Recruitment, appointment and possible developments regarding the contractual position of staff members'. The revised circular replaces the previous Circulars No. 9 (Rev. 3) 'Staff contracts' and No. 2 (Rev. 2) 'Guidelines and procedures concerning recruitment and probation period for staff members'. The main features of the new contract policy are as follows: The new policy provides chances for long-term employment for all staff recruits staying for four years without distinguishing between those assigned to long-term or short-term activities when joining CERN. In addition, it presents a number of simplifications for the award of ICs. There are henceforth only 2 types of contract: Limited Duration (LD) contracts for all recruitment and Indefinite Contracts (IC) for...

  17. Regularized Structural Equation Modeling.

    Science.gov (United States)

    Jacobucci, Ross; Grimm, Kevin J; McArdle, John J

    A new method is proposed that extends the use of regularization in both lasso and ridge regression to structural equation models. The method is termed regularized structural equation modeling (RegSEM). RegSEM penalizes specific parameters in structural equation models, with the goal of creating easier to understand and simpler models. Although regularization has gained wide adoption in regression, very little has transferred to models with latent variables. By adding penalties to specific parameters in a structural equation model, researchers have a high level of flexibility in reducing model complexity, overcoming poor fitting models, and the creation of models that are more likely to generalize to new samples. The proposed method was evaluated through a simulation study, two illustrative examples involving a measurement model, and one empirical example involving the structural part of the model to demonstrate RegSEM's utility.

  18. Regularity of Bound States

    DEFF Research Database (Denmark)

    Faupin, Jeremy; Møller, Jacob Schach; Skibsted, Erik

    2011-01-01

    We study regularity of bound states pertaining to embedded eigenvalues of a self-adjoint operator H, with respect to an auxiliary operator A that is conjugate to H in the sense of Mourre. We work within the framework of singular Mourre theory which enables us to deal with confined massless Pauli–......–Fierz models, our primary example, and many-body AC-Stark Hamiltonians. In the simpler context of regular Mourre theory, our results boil down to an improvement of results obtained recently in [8, 9]....

  19. Manifold Regularized Reinforcement Learning.

    Science.gov (United States)

    Li, Hongliang; Liu, Derong; Wang, Ding

    2017-01-27

    This paper introduces a novel manifold regularized reinforcement learning scheme for continuous Markov decision processes. Smooth feature representations for value function approximation can be automatically learned using the unsupervised manifold regularization method. The learned features are data-driven, and can be adapted to the geometry of the state space. Furthermore, the scheme provides a direct basis representation extension for novel samples during policy learning and control. The performance of the proposed scheme is evaluated on two benchmark control tasks, i.e., the inverted pendulum and the energy storage problem. Simulation results illustrate the concepts of the proposed scheme and show that it can obtain excellent performance.

  20. Elections to Staff Council

    CERN Multimedia

    Staff Association

    2013-01-01

    Elections to fill all seats in the Staff Council are being organized this month. The voting takes place from the 28 of October to the 11th of November, at noon. As you may have noted when reading Echo, many issues concerning our employment conditions are on the agenda of the coming months, and in particular the Five-yearly-Review 2015, subject of the questionnaire that you probably recently filled out. All this will keep the next Staff Council very busy indeed. So, make your voice heard and take part in the elections for a new Staff Council. By doing so, you will be encouraging the men and women who will be representing you over the next two years and they will doubtless appreciate your gratitude. Every member of the Staff Association will have received an email containing a link to the webpage which will allow voting. If you are a member of the Staff Association and you did not receive such an email, please contact the Staff Association secretariat (staff.association@cern.ch). Do not forget to v...

  1. Annotation of Regular Polysemy

    DEFF Research Database (Denmark)

    Martinez Alonso, Hector

    Regular polysemy has received a lot of attention from the theory of lexical semantics and from computational linguistics. However, there is no consensus on how to represent the sense of underspecified examples at the token level, namely when annotating or disambiguating senses of metonymic words...

  2. Staff rules and regulations

    CERN Multimedia

    HR Department

    2007-01-01

    The 11th edition of the Staff Rules and Regulations, dated 1 January 2007, adopted by the Council and the Finance Committee in December 2006, is currently being distributed to departmental secretariats. The Staff Rules and Regulations, together with a summary of the main modifications made, will be available, as from next week, on the Human Resources Department's intranet site: http://cern.ch/hr-web/internal/admin_services/rules/default.asp The main changes made to the Staff Rules and Regulations stem from the five-yearly review of employment conditions of members of the personnel. The changes notably relate to: the categories of members of the personnel (e.g. removal of the local staff category); the careers structure and the merit recognition system; the non-residence, installation and re-installation allowances; the definition of family, family allowances and family-related leave; recognition of partnerships; education fees. The administrative circulars, some of which are being revised following the ...

  3. Staff Association Information Meetings

    CERN Multimedia

    2011-01-01

    Staff Association Information Meetings: - Thursday 29 September at 2 p.m., Meyrin, Kjell Johnsen Auditorium, 30-7-017 (in French) - Friday 30 September at 10 a.m., Prévessin, BE Auditorium, 864-1-D02 (in French) - Monday 3 October at 2 p.m., Meyrin, IT Auditorium, 31-3-004 (in French) - Tuesday 4 October at 2 p.m., Meyrin, Filtration Plant, 222-R-001 (in English)   Staff Association

  4. Sparse structure regularized ranking

    KAUST Repository

    Wang, Jim Jing-Yan

    2014-04-17

    Learning ranking scores is critical for the multimedia database retrieval problem. In this paper, we propose a novel ranking score learning algorithm by exploring the sparse structure and using it to regularize ranking scores. To explore the sparse structure, we assume that each multimedia object could be represented as a sparse linear combination of all other objects, and combination coefficients are regarded as a similarity measure between objects and used to regularize their ranking scores. Moreover, we propose to learn the sparse combination coefficients and the ranking scores simultaneously. A unified objective function is constructed with regard to both the combination coefficients and the ranking scores, and is optimized by an iterative algorithm. Experiments on two multimedia database retrieval data sets demonstrate the significant improvements of the propose algorithm over state-of-the-art ranking score learning algorithms.

  5. Regularized Reduced Order Models

    CERN Document Server

    Wells, David; Xie, Xuping; Iliescu, Traian

    2015-01-01

    This paper puts forth a regularization approach for the stabilization of proper orthogonal decomposition (POD) reduced order models (ROMs) for the numerical simulation of realistic flows. Two regularized ROMs (Reg-ROMs) are proposed: the Leray ROM (L-ROM) and the evolve-then-filter ROM (EF-ROM). These new Reg-ROMs use spatial filtering to smooth (regularize) various terms in the ROMs. Two spatial filters are used: a POD projection onto a POD subspace (Proj) and a new POD differential filter (DF). The four Reg-ROM/filter combinations are tested in the numerical simulation of the one-dimensional Burgers equation with a small diffusion coefficient and the three-dimensional flow past a circular cylinder at a low Reynolds number (Re = 100). Overall, the most accurate Reg-ROM/filter combination is EF-ROM-DF. Furthermore, the DF generally yields better results than Proj. Finally, the four Reg-ROM/filter combinations are computationally efficient and generally more accurate than the standard Galerkin ROM.

  6. Regularizing portfolio optimization

    Science.gov (United States)

    Still, Susanne; Kondor, Imre

    2010-07-01

    The optimization of large portfolios displays an inherent instability due to estimation error. This poses a fundamental problem, because solutions that are not stable under sample fluctuations may look optimal for a given sample, but are, in effect, very far from optimal with respect to the average risk. In this paper, we approach the problem from the point of view of statistical learning theory. The occurrence of the instability is intimately related to over-fitting, which can be avoided using known regularization methods. We show how regularized portfolio optimization with the expected shortfall as a risk measure is related to support vector regression. The budget constraint dictates a modification. We present the resulting optimization problem and discuss the solution. The L2 norm of the weight vector is used as a regularizer, which corresponds to a diversification 'pressure'. This means that diversification, besides counteracting downward fluctuations in some assets by upward fluctuations in others, is also crucial because it improves the stability of the solution. The approach we provide here allows for the simultaneous treatment of optimization and diversification in one framework that enables the investor to trade off between the two, depending on the size of the available dataset.

  7. k-Walk-Regular Digraphs

    Institute of Scientific and Technical Information of China (English)

    Wen LIU; Jing LIN

    2011-01-01

    In this paper,we define a class of strongly connected digraph,called the k-walk-regular digraph,study some properties of it,provide its some algebraic characterization and point out that the O-walk-regular digraph is the same as the walk-regular digraph discussed BY Liu and Lin in 2010 and the D-walk-regular digraph is identical with the weakly distance-regular digraph defined by Comellas et al in 2004.

  8. Annotation of Regular Polysemy

    DEFF Research Database (Denmark)

    Martinez Alonso, Hector

    Regular polysemy has received a lot of attention from the theory of lexical semantics and from computational linguistics. However, there is no consensus on how to represent the sense of underspecified examples at the token level, namely when annotating or disambiguating senses of metonymic words...... like “London” (Location/Organization) or “cup” (Container/Content). The goal of this dissertation is to assess whether metonymic sense underspecification justifies incorporating a third sense into our sense inventories, thereby treating the underspecified sense as independent from the literal...

  9. UNI-VECTOR-SENSOR DIRECTION FINDING WITH REGULARIZED ESPRIT

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The regularized Least-Squares Estimation method of Signal Parameters via Rotational Invariance Techniques (LS-ESPRIT) is herein proposed for Direction-Of-Arrival (DOA) estimation of non-Gaussian sources with only one acoustic vector-sensor. The Second-Order Statistics (SOS) and Higher-Order Statistics (HOS) of data are fused within a regularization framework. The steering vectors can be blindly identified by the regularized ESPRIT, from which the aim of DOA estimation can be achieved. Several variants of the regularized ESPRIT are discussed. A suboptimal scheme for determination of the regularization parameters is also given.

  10. From regular modules to von Neumann regular rings via coordinatization

    Directory of Open Access Journals (Sweden)

    Leonard Daus

    2014-07-01

    Full Text Available In this paper we establish a very close link (in terms of von Neu- mann's coordinatization between regular modules introduced by Zel- manowitz, on one hand, and von Neumann regular rings, on the other hand: we prove that the lattice L^{fg}(M of all finitely generated submodules of a finitely generated regular module M, over an arbitrary ring, can be coordinatized as the lattice of all principal right ideals of some von Neumann regular ring S.

  11. Structure for Regular Inclusions

    CERN Document Server

    Pitts, David R

    2012-01-01

    We study pairs (C,D) of unital C*-algebras where D is an abelian C*-subalgebra of C which is regular in C. When D is a MASA in C, there exists a unique completely positive unital map E of C into the injective envelope I(D) of D whose restriction to D is the identity on D. We show that the left kernel of E is the unique closed two-sided ideal of C maximal with respect to having trivial intersection with D. We introduce a new class of well behaved state extensions, the compatible states; we identify compatible states when D is a MASA in C in terms of groups constructed from local dynamics near a pure state on D. When C is separable, D is a MASA in C, and the pair (C,D) is regular, the set of pure states on D with unique state extensions to C is dense in D. The map E can be used as a substitute for a conditional expectation in the construction of coordinates for C relative to D. We show that certain classes of compatible states have natural groupoid operations, and we show that constructions of Kumjian and Renau...

  12. Growth Regularity and Bulb Propagation Techniques of Lilies in Open Field%露地栽培条件下百合的生长规律及种球繁殖技术

    Institute of Scientific and Technical Information of China (English)

    王莹; 王良桂; 黄成名; 李玉帆; 袁素霞; 刘春; 明军

    2014-01-01

    Objective] The growth regularity and bulb propagation techniques of the 2 lily groups under the open conditions was studied in order to provide reference for highly efficiency, low cost, large-scale production and landscape planting application.[Method]Using Lilium lancifolium, Lilium‘Yelloween’as materials, the phenophase and the morphology were observed, curve of the measured data of plant height and bud was fitted by logistic equation and exponential equation, the growth model was constructed, meanwhile, the bud picking experience was designed, planting direction and planting density were studied to find out the growth effect of the bulb.[Result]The result showed that, there was a big difference between L. lancifolium and‘Yelloween’on the phenophase. L. lancifolium bloomed later, needed higher active accumulated temperature which was 4 256℃, but‘Yelloween’ needed only about 4 981.5℃. For L. lancifolium, the plant height equation was y=97.5949/(1+e^-(x-62.6822)/22.8819), the diameter equation was y=0.1578e^(0.0358x), the length equation was y=90.2066/(1+e^-(x-117.1807)/8.7295), which were accorded with logistic equation. For ‘Yelloween’, the plant height equation was y=70.3771/(1+e^-(x-19.1133)/9.5840), the bud’s diameter equation was y=41.2215/(1+e^-(x-65.9236)/17.1028), bud length equation was y=158.9531/(1+e^-(x-62.9011)/9.7562), which were accorded or similar with the exponential equation. The bud picking experience showed that picked the bud on the blooming day achieved the best effect on‘Yelloween’, the average fresh weight of bulb was 89.71 g, and 18.93 cm in bulb circumference, no bud picking was the best way for L. lancifolium, with the average fresh weight of bulb was 87.59 g. Planted in NS-trending direction increased the height and steam diameter slight. The best planting spacing of‘Yelloween’was 10 cm×20 cm, then the production was 26 936 kg per 667 m2, which was considered as the best yield, then the bulb

  13. Modified sparse regularization for electrical impedance tomography.

    Science.gov (United States)

    Fan, Wenru; Wang, Huaxiang; Xue, Qian; Cui, Ziqiang; Sun, Benyuan; Wang, Qi

    2016-03-01

    Electrical impedance tomography (EIT) aims to estimate the electrical properties at the interior of an object from current-voltage measurements on its boundary. It has been widely investigated due to its advantages of low cost, non-radiation, non-invasiveness, and high speed. Image reconstruction of EIT is a nonlinear and ill-posed inverse problem. Therefore, regularization techniques like Tikhonov regularization are used to solve the inverse problem. A sparse regularization based on L1 norm exhibits superiority in preserving boundary information at sharp changes or discontinuous areas in the image. However, the limitation of sparse regularization lies in the time consumption for solving the problem. In order to further improve the calculation speed of sparse regularization, a modified method based on separable approximation algorithm is proposed by using adaptive step-size and preconditioning technique. Both simulation and experimental results show the effectiveness of the proposed method in improving the image quality and real-time performance in the presence of different noise intensities and conductivity contrasts.

  14. Integration of CERN staff

    CERN Multimedia

    1965-01-01

    An example of the integration of CERN staff in the neighbouring communes is provided by the hamlet of Bugnon at St-Genis-Pouilly (Ain), FRance. The CERN installation on the Swiss site are visible on the left in the background. Behind them the Saleve mountain in Haute-Savoie.

  15. Staff rules and regulations

    CERN Document Server

    HR Department

    2007-01-01

    The 11th edition of the Staff Rules and Regulations, dated 1 January 2007, adopted by the Council and the Finance Committee in December 2006, is currently being distributed to departmental secretariats. The Staff Rules and Regulations, together with a summary of the main modifications made, will be available, as from next week, on the Human Resources Department's intranet site: http://cern.ch/hr-web/internal/admin_services/rules/default.asp The main changes made to the Staff Rules and Regulations stem from the five-yearly review of employment conditions of members of the personnel. The changes notably relate to: the categories of members of the personnel (e.g. removal of the local staff category); the careers structure and the merit recognition system; the non-residence, installation and re-installation allowances; the definition of family, family allowances and family-related leave; recognition of partnerships; education fees. The administrative circulars, some of which are being revised following the m...

  16. Evolutionary internalized regularities.

    Science.gov (United States)

    Schwartz, R

    2001-08-01

    Roger Shepard's proposals and supporting experiments concerning evolutionary internalized regularities have been very influential in the study of vision and in other areas of psychology and cognitive science. This paper examines issues concerning the need, nature, explanatory role, and justification for postulating such internalized constraints. In particular, I seek further clarification from Shepard on how best to understand his claim that principles of kinematic geometry underlie phenomena of motion perception. My primary focus is on the ecological validity of Shepard's kinematic constraint in the context of ordinary motion perception. First, I explore the analogy Shepard draws between internalized circadian rhythms and the supposed internalization of kinematic geometry. Next, questions are raised about how to interpret and justify applying results from his own and others' experimental studies of apparent motion to more everyday cases of motion perception in richer environments. Finally, some difficulties with Shepard's account of the evolutionary development of his kinematic constraint are considered.

  17. Adaptive Regularization of Neural Classifiers

    DEFF Research Database (Denmark)

    Andersen, Lars Nonboe; Larsen, Jan; Hansen, Lars Kai

    1997-01-01

    We present a regularization scheme which iteratively adapts the regularization parameters by minimizing the validation error. It is suggested to use the adaptive regularization scheme in conjunction with optimal brain damage pruning to optimize the architecture and to avoid overfitting. Furthermo...

  18. Learning Rates for -Regularized Kernel Classifiers

    Directory of Open Access Journals (Sweden)

    Hongzhi Tong

    2013-01-01

    Full Text Available We consider a family of classification algorithms generated from a regularization kernel scheme associated with -regularizer and convex loss function. Our main purpose is to provide an explicit convergence rate for the excess misclassification error of the produced classifiers. The error decomposition includes approximation error, hypothesis error, and sample error. We apply some novel techniques to estimate the hypothesis error and sample error. Learning rates are eventually derived under some assumptions on the kernel, the input space, the marginal distribution, and the approximation error.

  19. University Staff's Perception of Deregulation on Higher Education in Nigeria

    Science.gov (United States)

    Adebayo, Florence Aduke

    2014-01-01

    The study investigated the university staff's perception on deregulation of higher education in Nigeria. Descriptive research of the survey type was used for the study. The population comprised all the university staff of universities in Ekiti and Ondo states, Nigeria. Simple random sampling technique was used to select 700 academic and…

  20. 护理人员对护患沟通障碍、方法及技巧认知的调查%Investigation on nursing staff' s cognition of nursing-patient communication barrier and technique

    Institute of Scientific and Technical Information of China (English)

    胡腊先; 李秀云; 黄海珊

    2011-01-01

    Objective To explore the nursing staff' s cognition of barrier, method and technique of nursing-patient communication, to provide reference basis for improving effective nursing-patient communication.Methods 445 nurses sampled randomly from 6 hospitals in Hubei Province were investigated by selfdesigned questionnaire related to nursing-patient communication. Results 87.2% patients had trained about communication according teaching and 26.52% mastered these techniques skillful; 98.88% paid attention to communication with patients and 74.16% believed effective communication was easily attained, but 81.35% ignored it and the influential factors for communication was too busy to operate, and 66.07% nurses held that poor communication was head reason to lead complaint. The higher the title and service year, the deeper the master degree for these nurses, but the younger communicated more frequently with patients(F =4.532,2.891,P < 0.05). Conclusions Nurse should strenthen their communication technique by learning, paying more attention to communicaiont skills and realizing advantage of senior nurses in order to provide effective communication.%目的 了解护理人员对护患沟通障碍、方法及技巧的认知,为促进临床有效护患沟通提供参考依据。方法 采用问卷随机抽样调查湖北省6所三甲医院445名护士的护患沟通技巧及障碍认知情况。结果 本组护士中87.2%接受过护患沟通培训,26.52%能熟练应用沟通技巧;98.88%认为护患沟通很重要,74.16%认为有效的沟通较易做到;81.35%认为影响沟通的原因是太忙,66.07%认为沟通不良是投诉主要原因。不同职称与工作年限护士沟通技巧掌握程度比较,差异有统计学意义(F=4.532,2.891,P<0.05)。结论 为提高护患沟通的有效性,护士应加强学习提高沟通技能;注重沟通技巧,综合掌握灵活运用;发挥高职称护士的优势,言传身教于实践工作。

  1. A "Coach Approach" to Staff Engagement

    Directory of Open Access Journals (Sweden)

    Margaret Macmillan

    2011-11-01

    Full Text Available The speed of change is challenging libraries to redevelop themselves in ways we have never seen before. Rising costs and changing customer expectations are forcing staff to continuously learn new skills, adapt to new technologies and work more closely in collaboration with others in response to this unpredictable environment. At the same time library leaders need to communicate regularly with staff and to motivate them to dialogue with each other about the value of the library service that they provide to the community. A creative approach to building flexibility, resilience and staff engagement has become essential for survival. Coaching is a creative, innovative and effective communications tool that is now considered to be one of the most important ways to encourage employees to continue to learn and develop. Its greatest impact is in building leadership and staff engagement. Communicating with “a coach approach” or coaching mindset is a powerful way for library leaders to connect with others where the flow and exchange is positive and there is a mutual benefit of contribution and collaboration, expanded knowledge and innovation. The basics of fostering “a coach approach” with library staff requires an understanding of the importance of “reframing” one’s personal attitudes and perspectives, appreciating the art of focused listening and the impact of positive acknowledgement, learning to ask the right questions and formulating action plans for continued success. It is a learned skill that requires a commitment to practice but is one that will ultimately demonstrate positive results.

  2. Implementing regularization implicitly via approximate eigenvector computation

    CERN Document Server

    Mahoney, Michael W

    2010-01-01

    Regularization is a powerful technique for extracting useful information from noisy data. Typically, it is implemented by adding some sort of norm constraint to an objective function and then exactly optimizing the modified objective function. This procedure typically leads to optimization problems that are computationally more expensive than the original problem, a fact that is clearly problematic if one is interested in large-scale applications. On the other hand, a large body of empirical work has demonstrated that heuristics, and in some cases approximation algorithms, developed to speed up computations sometimes have the side-effect of performing regularization implicitly. Thus, we consider the question: What is the regularized optimization objective that an approximation algorithm is exactly optimizing? We address this question in the context of computing approximations to the smallest nontrivial eigenvector of a graph Laplacian; and we consider three random-walk-based procedures: one based on the heat ...

  3. Rotating regular black holes

    CERN Document Server

    Bambi, Cosimo

    2013-01-01

    The formation of spacetime singularities is a quite common phenomenon in General Relativity and it is regulated by specific theorems. It is widely believed that spacetime singularities do not exist in Nature, but that they represent a limitation of the classical theory. While we do not yet have any solid theory of quantum gravity, toy models of black hole solutions without singularities have been proposed. So far, there are only non-rotating regular black holes in the literature. These metrics can be hardly tested by astrophysical observations, as the black hole spin plays a fundamental role in any astrophysical process. In this letter, we apply the Newman-Janis algorithm to the Hayward and to the Bardeen black hole metrics. In both cases, we obtain a family of rotating solutions. Every solution corresponds to a different matter configuration. Each family has one solution with special properties, which can be written in Kerr-like form in Boyer-Lindquist coordinates. These special solutions are of Petrov type ...

  4. Rotating regular black holes

    Energy Technology Data Exchange (ETDEWEB)

    Bambi, Cosimo, E-mail: bambi@fudan.edu.cn; Modesto, Leonardo, E-mail: lmodesto@fudan.edu.cn

    2013-04-25

    The formation of spacetime singularities is a quite common phenomenon in General Relativity and it is regulated by specific theorems. It is widely believed that spacetime singularities do not exist in Nature, but that they represent a limitation of the classical theory. While we do not yet have any solid theory of quantum gravity, toy models of black hole solutions without singularities have been proposed. So far, there are only non-rotating regular black holes in the literature. These metrics can be hardly tested by astrophysical observations, as the black hole spin plays a fundamental role in any astrophysical process. In this Letter, we apply the Newman–Janis algorithm to the Hayward and to the Bardeen black hole metrics. In both cases, we obtain a family of rotating solutions. Every solution corresponds to a different matter configuration. Each family has one solution with special properties, which can be written in Kerr-like form in Boyer–Lindquist coordinates. These special solutions are of Petrov type D, they are singularity free, but they violate the weak energy condition for a non-vanishing spin and their curvature invariants have different values at r=0 depending on the way one approaches the origin. We propose a natural prescription to have rotating solutions with a minimal violation of the weak energy condition and without the questionable property of the curvature invariants at the origin.

  5. Ensemble manifold regularization.

    Science.gov (United States)

    Geng, Bo; Tao, Dacheng; Xu, Chao; Yang, Linjun; Hua, Xian-Sheng

    2012-06-01

    We propose an automatic approximation of the intrinsic manifold for general semi-supervised learning (SSL) problems. Unfortunately, it is not trivial to define an optimization function to obtain optimal hyperparameters. Usually, cross validation is applied, but it does not necessarily scale up. Other problems derive from the suboptimality incurred by discrete grid search and the overfitting. Therefore, we develop an ensemble manifold regularization (EMR) framework to approximate the intrinsic manifold by combining several initial guesses. Algorithmically, we designed EMR carefully so it 1) learns both the composite manifold and the semi-supervised learner jointly, 2) is fully automatic for learning the intrinsic manifold hyperparameters implicitly, 3) is conditionally optimal for intrinsic manifold approximation under a mild and reasonable assumption, and 4) is scalable for a large number of candidate manifold hyperparameters, from both time and space perspectives. Furthermore, we prove the convergence property of EMR to the deterministic matrix at rate root-n. Extensive experiments over both synthetic and real data sets demonstrate the effectiveness of the proposed framework.

  6. Regular Expression Matching and Operational Semantics

    Directory of Open Access Journals (Sweden)

    Asiri Rathnayake

    2011-08-01

    Full Text Available Many programming languages and tools, ranging from grep to the Java String library, contain regular expression matchers. Rather than first translating a regular expression into a deterministic finite automaton, such implementations typically match the regular expression on the fly. Thus they can be seen as virtual machines interpreting the regular expression much as if it were a program with some non-deterministic constructs such as the Kleene star. We formalize this implementation technique for regular expression matching using operational semantics. Specifically, we derive a series of abstract machines, moving from the abstract definition of matching to increasingly realistic machines. First a continuation is added to the operational semantics to describe what remains to be matched after the current expression. Next, we represent the expression as a data structure using pointers, which enables redundant searches to be eliminated via testing for pointer equality. From there, we arrive both at Thompson's lockstep construction and a machine that performs some operations in parallel, suitable for implementation on a large number of cores, such as a GPU. We formalize the parallel machine using process algebra and report some preliminary experiments with an implementation on a graphics processor using CUDA.

  7. Management problems of staff motivation

    OpenAIRE

    PUZYNYA T.A.

    2015-01-01

    Staff motivation is a major link in improving the competitiveness of any organization. One of the main problems of management of motivation of staff is the individuality of each employee, so the knowledge of psychology and individual needs will help organizations effectively manage staff.

  8. Management problems of staff motivation

    OpenAIRE

    PUZYNYA T.A.

    2015-01-01

    Staff motivation is a major link in improving the competitiveness of any organization. One of the main problems of management of motivation of staff is the individuality of each employee, so the knowledge of psychology and individual needs will help organizations effectively manage staff.

  9. Analysis on Characteristics and Regularities of Efficacies of Acupoint Injection by Using Data Mining Technique%基于数据挖掘技术的穴位注射疗法效应特点研究

    Institute of Scientific and Technical Information of China (English)

    许晓康; 贾春生; 王建岭; 石晶; 覃亮; 张莘; 张选平

    2012-01-01

    Objective To analyze the potential learning and regularity characters of clinical application of acupoint injection In modern literature of Chinese medicine by using data mining technique, so as to provide a reference for clinical application of this therapy- Methods A database was established first by computer recording of the standardized information data after collection of papers about acupoint injection therapy published in modern medical journals, collections of theses of medical academic conferences, dissertations for medical master's and doctor's degrees. Then, the data mining technique was employed to conduct cross link design about the types or categories of illnesses or clinical conditions, categories of departments, selection of Chinese materia medica, acupoint recipes, and clinical outcomes, etc. At last, the rules and characteristics of the acupoint injection were summarized and analyzed. Results The acupoint injection therapy enjoys the first rank of therapies for the treatment of diseases or clinical conditions of the internal medicine, and the second rank in the treatment of surgical problems. With respect to the types of illnesses or clinical conditions, it is used most frequently for hiccup and backleg pain. Generally, about 4 acupoints and 2 categories of medicines (Chinese herbal medicine or western medicine preparations) are selected in one session of treatment by using the acupoint injection therapy. The acupoints used are those close to and remote to the loci. The drugs predominately employed are single or compound western medicine preparations. The total effective rate is up to more than 93%. Conclusion The acupoint injection therapy has some obvious advantages in the treatment of clinical conditions or illness of the internal medicine and surgical problems, especially for hiccup and backleg pain. It is simple in clinical application and has a higher therapeutic effect.%目的:应用数据挖掘技术,发现穴位注射临床运用中潜

  10. Sleep Quality among Female Hospital Staff Nurses

    Directory of Open Access Journals (Sweden)

    Pei-Li Chien

    2013-01-01

    Full Text Available Purpose. To investigate sleep quality of hospital staff nurses, both by subjective questionnaire and objective measures. Methods. Female staff nurses at a regional teaching hospital in Northern Taiwan were recruited. The Chinese version of the pittsburgh sleep quality index (C-PSQI was used to assess subjective sleep quality, and an electrocardiogram-based cardiopulmonary coupling (CPC technique was used to analyze objective sleep stability. Work stress was assessed using questionnaire on medical worker’s stress. Results. A total of 156 staff nurses completed the study. Among the staff nurses, 75.8% (117 had a PSQI score of ≥5 and 39.8% had an inadequate stable sleep ratio on subjective measures. Nurses with a high school or lower educational degree had a much higher risk of sleep disturbance when compared to nurses with a college or higher level degree. Conclusions. Both subjective and objective measures demonstrated that poor sleep quality is a common health problem among hospital staff nurses. More studies are warranted on this important issue to discover possible factors and therefore to develop a systemic strategy to cope with the problem.

  11. A Report on the Mark Twain Staff Development Institute: July 1, 1971 to January 14, 1972.

    Science.gov (United States)

    Checkon, Stephen; And Others

    Described is the 1971-72 Mark Twain School (Montgomery County, Maryland) staff development institute at which 38 regular classroom teachers were trained in individualized psychoeducational programing for emotionally disturbed adolescents with learning difficulties whose needs could not be met in regular secondary school programs. Five chapters…

  12. Adaptive Regularization of Neural Networks Using Conjugate Gradient

    DEFF Research Database (Denmark)

    Goutte, Cyril; Larsen, Jan

    1998-01-01

    Andersen et al. (1997) and Larsen et al. (1996, 1997) suggested a regularization scheme which iteratively adapts regularization parameters by minimizing validation error using simple gradient descent. In this contribution we present an improved algorithm based on the conjugate gradient technique........ Numerical experiments with feedforward neural networks successfully demonstrate improved generalization ability and lower computational cost...

  13. Regular Bisimple ω2-semigroups

    Institute of Scientific and Technical Information of China (English)

    汪立民; 商宇

    2008-01-01

    @@ The regular semigroups S with an idempotent set Es = {e0,e1,…,en,…} such that e0 > e1 >…> en >… is called a regular ω-semigroup. In [5] Reilly determined the structure of a regular bisimple ω-semigroup as BR(G,θ),which is the classical Bruck-Reilly extension of a group G.

  14. Completely regular fuzzifying topological spaces

    Directory of Open Access Journals (Sweden)

    A. K. Katsaras

    2005-12-01

    Full Text Available Some of the properties of the completely regular fuzzifying topological spaces are investigated. It is shown that a fuzzifying topology τ is completely regular if and only if it is induced by some fuzzy uniformity or equivalently by some fuzzifying proximity. Also, τ is completely regular if and only if it is generated by a family of probabilistic pseudometrics.

  15. On regular rotating black holes

    Science.gov (United States)

    Torres, R.; Fayos, F.

    2017-01-01

    Different proposals for regular rotating black hole spacetimes have appeared recently in the literature. However, a rigorous analysis and proof of the regularity of this kind of spacetimes is still lacking. In this note we analyze rotating Kerr-like black hole spacetimes and find the necessary and sufficient conditions for the regularity of all their second order scalar invariants polynomial in the Riemann tensor. We also show that the regularity is linked to a violation of the weak energy conditions around the core of the rotating black hole.

  16. Constrained and regularized system identification

    Directory of Open Access Journals (Sweden)

    Tor A. Johansen

    1998-04-01

    Full Text Available Prior knowledge can be introduced into system identification problems in terms of constraints on the parameter space, or regularizing penalty functions in a prediction error criterion. The contribution of this work is mainly an extension of the well known FPE (Final Production Error statistic to the case when the system identification problem is constrained and contains a regularization penalty. The FPECR statistic (Final Production Error with Constraints and Regularization is of potential interest as a criterion for selection of both regularization parameters and structural parameters such as order.

  17. On regular rotating black holes

    CERN Document Server

    Torres, Ramon

    2016-01-01

    Different proposals for regular rotating black hole spacetimes have appeared recently in the literature. However, a rigorous analysis and proof of the regularity of this kind of spacetimes is still lacking. In this note we analyze rotating Kerr-like black hole spacetimes and find the necessary and sufficient conditions for the regularity of all their second order scalar invariants polynomial in the Riemann tensor. We also show that the regularity is linked to a violation of the weak energy conditions around the core of the rotating black hole.

  18. On Ideals of Regular Rings

    Institute of Scientific and Technical Information of China (English)

    CHEN Huan Yin; LI Fu An

    2002-01-01

    In this paper, we investigate ideals of regular rings and give several characterizations for an ideal to satisfy the comparability. In addition, it is shown that, if Ⅰ is a minimal two-sided ideal of a regular ring R, then Ⅰ satisfies the comparability if and only if Ⅰ is separative. Furthermore, we prove that, for ideals with stable range one, Roth's problem has an affirmative solution. These extend the corresponding results on unit-regularity and one-sided unit-regularity.

  19. STAFF VACANCY LIST

    CERN Multimedia

    Human Resources Division

    2002-01-01

    For economy reasons, it has been decided to stop printing and distributing this list to Staff Members. It can be found on the Web (LIST). Divisional Administrative Officers will receive an updated printed copy on a monthly basis and are asked to display this in a public place in their division. Copies will also be posted on the notice boards of the Administration Building (No. 60) in the glass-fronted cabinet (close to the lifts) and also on the notice board close to the Post Office. A copy will also be given to the Reception (Building No. 33). Human Resources Division Tel. 74606

  20. Learning regularized LDA by clustering.

    Science.gov (United States)

    Pang, Yanwei; Wang, Shuang; Yuan, Yuan

    2014-12-01

    As a supervised dimensionality reduction technique, linear discriminant analysis has a serious overfitting problem when the number of training samples per class is small. The main reason is that the between- and within-class scatter matrices computed from the limited number of training samples deviate greatly from the underlying ones. To overcome the problem without increasing the number of training samples, we propose making use of the structure of the given training data to regularize the between- and within-class scatter matrices by between- and within-cluster scatter matrices, respectively, and simultaneously. The within- and between-cluster matrices are computed from unsupervised clustered data. The within-cluster scatter matrix contributes to encoding the possible variations in intraclasses and the between-cluster scatter matrix is useful for separating extra classes. The contributions are inversely proportional to the number of training samples per class. The advantages of the proposed method become more remarkable as the number of training samples per class decreases. Experimental results on the AR and Feret face databases demonstrate the effectiveness of the proposed method.

  1. Prereferral Intervention Practices of Regular Classroom Teachers: Implications for Regular and Special Education Preparation.

    Science.gov (United States)

    Brown, Joyceanne; And Others

    1991-01-01

    This survey of 201 regular education teachers found that the most frequently used prereferral strategies used to facilitate classroom adjustment and achievement were consultation with other professionals, parent conferences, and behavior management techniques. Elementary teachers implemented more strategies than secondary-level teachers.…

  2. Regularly timed events amid chaos

    Science.gov (United States)

    Blakely, Jonathan N.; Cooper, Roy M.; Corron, Ned J.

    2015-11-01

    We show rigorously that the solutions of a class of chaotic oscillators are characterized by regularly timed events in which the derivative of the solution is instantaneously zero. The perfect regularity of these events is in stark contrast with the well-known unpredictability of chaos. We explore some consequences of these regularly timed events through experiments using chaotic electronic circuits. First, we show that a feedback loop can be implemented to phase lock the regularly timed events to a periodic external signal. In this arrangement the external signal regulates the timing of the chaotic signal but does not strictly lock its phase. That is, phase slips of the chaotic oscillation persist without disturbing timing of the regular events. Second, we couple the regularly timed events of one chaotic oscillator to those of another. A state of synchronization is observed where the oscillators exhibit synchronized regular events while their chaotic amplitudes and phases evolve independently. Finally, we add additional coupling to synchronize the amplitudes, as well, however in the opposite direction illustrating the independence of the amplitudes from the regularly timed events.

  3. Online co-regularized algorithms

    NARCIS (Netherlands)

    Ruijter, T. de; Tsivtsivadze, E.; Heskes, T.

    2012-01-01

    We propose an online co-regularized learning algorithm for classification and regression tasks. We demonstrate that by sequentially co-regularizing prediction functions on unlabeled data points, our algorithm provides improved performance in comparison to supervised methods on several UCI benchmarks

  4. Online co-regularized algorithms

    NARCIS (Netherlands)

    Ruijter, T. de; Tsivtsivadze, E.; Heskes, T.

    2012-01-01

    We propose an online co-regularized learning algorithm for classification and regression tasks. We demonstrate that by sequentially co-regularizing prediction functions on unlabeled data points, our algorithm provides improved performance in comparison to supervised methods on several UCI benchmarks

  5. Nonconvex Regularization in Remote Sensing

    Science.gov (United States)

    Tuia, Devis; Flamary, Remi; Barlaud, Michel

    2016-11-01

    In this paper, we study the effect of different regularizers and their implications in high dimensional image classification and sparse linear unmixing. Although kernelization or sparse methods are globally accepted solutions for processing data in high dimensions, we present here a study on the impact of the form of regularization used and its parametrization. We consider regularization via traditional squared (2) and sparsity-promoting (1) norms, as well as more unconventional nonconvex regularizers (p and Log Sum Penalty). We compare their properties and advantages on several classification and linear unmixing tasks and provide advices on the choice of the best regularizer for the problem at hand. Finally, we also provide a fully functional toolbox for the community.

  6. Conservative regularization of compressible flow

    CERN Document Server

    Krishnaswami, Govind S; Thyagaraja, Anantanarayanan

    2015-01-01

    Ideal Eulerian flow may develop singularities in vorticity w. Navier-Stokes viscosity provides a dissipative regularization. We find a local, conservative regularization - lambda^2 w times curl(w) of compressible flow and compressible MHD: a three dimensional analogue of the KdV regularization of the one dimensional kinematic wave equation. The regulator lambda is a field subject to the constitutive relation lambda^2 rho = constant. Lambda is like a position-dependent mean-free path. Our regularization preserves Galilean, parity and time-reversal symmetries. We identify locally conserved energy, helicity, linear and angular momenta and boundary conditions ensuring their global conservation. Enstrophy is shown to remain bounded. A swirl velocity field is identified, which transports w/rho and B/rho generalizing the Kelvin-Helmholtz and Alfven theorems. A Hamiltonian and Poisson bracket formulation is given. The regularized equations are used to model a rotating vortex, channel flow, plane flow, a plane vortex ...

  7. Approximate Sparse Regularized Hyperspectral Unmixing

    Directory of Open Access Journals (Sweden)

    Chengzhi Deng

    2014-01-01

    Full Text Available Sparse regression based unmixing has been recently proposed to estimate the abundance of materials present in hyperspectral image pixel. In this paper, a novel sparse unmixing optimization model based on approximate sparsity, namely, approximate sparse unmixing (ASU, is firstly proposed to perform the unmixing task for hyperspectral remote sensing imagery. And then, a variable splitting and augmented Lagrangian algorithm is introduced to tackle the optimization problem. In ASU, approximate sparsity is used as a regularizer for sparse unmixing, which is sparser than l1 regularizer and much easier to be solved than l0 regularizer. Three simulated and one real hyperspectral images were used to evaluate the performance of the proposed algorithm in comparison to l1 regularizer. Experimental results demonstrate that the proposed algorithm is more effective and accurate for hyperspectral unmixing than state-of-the-art l1 regularizer.

  8. Regular Small-World Network

    Institute of Scientific and Technical Information of China (English)

    ZOU Zhi-Yun; MAO Bao-Hua; HAO Hai-Ming; GAO Jian-Zhi; YANG Jie-Jiao

    2009-01-01

    According to the deficiencies in Watts and Strogatz's small-world network model, we present a new regular model to establish the small-world network. Besides the property of the small-world, this model has other properties such as accuracy in controlling the average shortest path length L, and the average clustering coefficient C, also regular network topology as well as enhanced network robustness. This method improves the construction of the small-world network essentially, so that the regular small-world network closely resembles the actual network. We also present studies on the relationships among the quantities of a variety of edges, L and C in regular small-world network in detail. This research lays the foundation for the establishment of the regular small-world network and acts as a good guidance for further research of this model and its applications.

  9. Involving staff pharmacists in management decisions.

    Science.gov (United States)

    Robinson, L A; Vanderveen, T W

    1977-03-01

    Various administrative techniques used to bring staff pharmacists in a decentralized, satellite pharmacy system into the managerial decision-making process are discussed. These techniques include a staff pharmacist on-call procedure to discourage absenteeism, and the concept of a head pharmacist to serve as a link with departmental administration. The head pharmacist works in the satelite pharmacy, is responsible for its daily operation and is the spokesman for the satellite. Active roles for the head pharmacist in the selection and evaluation of technicians are outlines. Management skills are developed in head pharmacists through a program of special classes and discussion groups. It is concluded that this program has improved the credibility of administrative decisions and has tapped an underused source of ideas and talent.

  10. PARTIAL REGULARITY FOR WEAK SOLUTIONS OF STATIONARY NAVIER-STOKES SYSTEMS

    Institute of Scientific and Technical Information of China (English)

    Chen Shuhong; Tan Zhong

    2008-01-01

    This article is concerned with the partial regularity for the weak solutions of stationary Navier-Stokes system under the controllable growth condition. By A-harmonic approximation technique, the optimal regularity is obtained.

  11. Evaluating your office staff.

    Science.gov (United States)

    Levin, Roger

    2004-11-01

    The most important assets in a dental practice are the people. We no longer live in an era in which an employee stays in the same job for decades. Change is inevitable and often comes at inopportune times. Evaluation gives the dentist the opportunity to identify key team members who will join the core team and train new staff members. Conversely, executive evaluation also demonstrates that there may not be a proper fit for a team member, if he or she cannot demonstrate the ability to grow and change with a practice despite support, training and career path development. As author Alvin Toffler noted, "The illiterate of the 21st century will not be those who cannot read or write, but those who cannot learn, unlearn and relearn."

  12. A Criterion for Regular Sequences

    Indian Academy of Sciences (India)

    D P Patil; U Storch; J Stückrad

    2004-05-01

    Let be a commutative noetherian ring and $f_1,\\ldots,f_r \\in R$. In this article we give (cf. the Theorem in $\\mathcal{x}$2) a criterion for $f_1,\\ldots,f_r$ to be regular sequence for a finitely generated module over which strengthens and generalises a result in [2]. As an immediate consequence we deduce that if $V(g_1,\\ldots,g_r) \\subseteq V(f_1,\\ldots,f_r)$ in Spec and if $f_1,\\ldots,f_r$ is a regular sequence in , then $g_1,\\ldots,g_r$ is also a regular sequence in .

  13. Regularized Kernel Forms of Minimum Squared Error Method

    Institute of Scientific and Technical Information of China (English)

    XU Jian-hua; ZHANG Xue-gong; LI Yan-da

    2006-01-01

    Minimum squared error (MSE) algorithm is one of the classical pattern recognition and regression analysis methods,whose objective is to minimize the squared error summation between the output of linear function and the desired output.In this paper,the MSE algorithm is modified by using kernel functions satisfying the Mercer condition and regularization technique; and the nonlinear MSE algorithms based on kernels and regularization term,that is,the regularized kernel forms of MSE algorithm,are proposed.Their objective functions include the squared error summation between the output of nonlinear function based on kernels and the desired output and a proper regularization term.The regularization technique can handle ill-posed problems,reduce the solution space,and control the generalization.Three squared regularization terms are utilized in this paper.In accordance with the probabilistic interpretation of regularization terms,the difference among three regularization terms is given in detail.The synthetic and real data are used to analyze the algorithm performance.

  14. On Regular Power-Substitution

    Institute of Scientific and Technical Information of China (English)

    Huanyin CHEN

    2009-01-01

    The necessary and sufficient conditions under which a ring satisfies regular power-substitution are investigated. It is shown that a ring R satisfies regular power-substitution if and only if a(-~)b in R implies that there exist n ∈ N and a U ∈ GLn(R) such that aU =Ub if and only if for any regular x ∈ R there exist m,n ∈ N and U ∈ GLn(R) such that xmIn = xmUxm, where a(-~)b means that there exists x, y, z ∈ R such that a = ybx, b = xaz and x = xyx = xzx. It is proved that every directly finite simple ring satisfies regular power-substitution. Some applications for stably free R-modules are also obtained.

  15. Extreme values, regular variation and point processes

    CERN Document Server

    Resnick, Sidney I

    1987-01-01

    Extremes Values, Regular Variation and Point Processes is a readable and efficient account of the fundamental mathematical and stochastic process techniques needed to study the behavior of extreme values of phenomena based on independent and identically distributed random variables and vectors It presents a coherent treatment of the distributional and sample path fundamental properties of extremes and records It emphasizes the core primacy of three topics necessary for understanding extremes the analytical theory of regularly varying functions; the probabilistic theory of point processes and random measures; and the link to asymptotic distribution approximations provided by the theory of weak convergence of probability measures in metric spaces The book is self-contained and requires an introductory measure-theoretic course in probability as a prerequisite Almost all sections have an extensive list of exercises which extend developments in the text, offer alternate approaches, test mastery and provide for enj...

  16. Tracking magnetogram proper motions by multiscale regularization

    Science.gov (United States)

    Jones, Harrison P.

    1995-01-01

    Long uninterrupted sequences of solar magnetograms from the global oscillations network group (GONG) network and from the solar and heliospheric observatory (SOHO) satellite will provide the opportunity to study the proper motions of magnetic features. The possible use of multiscale regularization, a scale-recursive estimation technique which begins with a prior model of how state variables and their statistical properties propagate over scale. Short magnetogram sequences are analyzed with the multiscale regularization algorithm as applied to optical flow. This algorithm is found to be efficient, provides results for all the spatial scales spanned by the data and provides error estimates for the solutions. It is found that the algorithm is less sensitive to evolutionary changes than correlation tracking.

  17. NONCONVEX REGULARIZATION FOR SHAPE PRESERVATION

    Energy Technology Data Exchange (ETDEWEB)

    CHARTRAND, RICK [Los Alamos National Laboratory

    2007-01-16

    The authors show that using a nonconvex penalty term to regularize image reconstruction can substantially improve the preservation of object shapes. The commonly-used total-variation regularization, {integral}|{del}u|, penalizes the length of the object edges. They show that {integral}|{del}u|{sup p}, 0 < p < 1, only penalizes edges of dimension at least 2-p, and thus finite-length edges not at all. We give numerical examples showing the resulting improvement in shape preservation.

  18. Regularization with a pruning prior

    DEFF Research Database (Denmark)

    Goutte, Cyril; Hansen, Lars Kai

    1997-01-01

    We investigate the use of a regularization priorthat we show has pruning properties. Analyses areconducted both using a Bayesian framework and withthe generalization method, on a simple toyproblem. Results are thoroughly compared withthose obtained with a traditional weight decay.......We investigate the use of a regularization priorthat we show has pruning properties. Analyses areconducted both using a Bayesian framework and withthe generalization method, on a simple toyproblem. Results are thoroughly compared withthose obtained with a traditional weight decay....

  19. Regular and Periodic Tachyon Kinks

    OpenAIRE

    Bazeia, D.; Menezes, R.; Ramos, J. G.

    2004-01-01

    We search for regular tachyon kinks in an extended model, which includes the tachyon action recently proposed to describe the tachyon field. The extended model that we propose adds a new contribution to the tachyon action, and seems to enrich the present scenario for the tachyon field. We have found stable tachyon kinks of regular profile, which may appropriately lead to the singular kink found by Sen sometime ago. Also, under specific conditions we may find periodic array of kink-antikink co...

  20. Commuting Π-regular rings

    Directory of Open Access Journals (Sweden)

    Shervin Sahebi

    2014-05-01

    Full Text Available ‎$R$ is called commuting regular ring (resp‎. ‎semigroupif‎ for each $x,y\\in R$ there exists $a\\in R$‎ such that$xy=yxayx$‎. ‎In this paper‎, ‎we introduce the concept of‎‎commuting $\\pi$-regular rings (resp‎. ‎semigroups and‎‎study various properties of them.

  1. Condition Number Regularized Covariance Estimation.

    Science.gov (United States)

    Won, Joong-Ho; Lim, Johan; Kim, Seung-Jean; Rajaratnam, Bala

    2013-06-01

    Estimation of high-dimensional covariance matrices is known to be a difficult problem, has many applications, and is of current interest to the larger statistics community. In many applications including so-called the "large p small n" setting, the estimate of the covariance matrix is required to be not only invertible, but also well-conditioned. Although many regularization schemes attempt to do this, none of them address the ill-conditioning problem directly. In this paper, we propose a maximum likelihood approach, with the direct goal of obtaining a well-conditioned estimator. No sparsity assumption on either the covariance matrix or its inverse are are imposed, thus making our procedure more widely applicable. We demonstrate that the proposed regularization scheme is computationally efficient, yields a type of Steinian shrinkage estimator, and has a natural Bayesian interpretation. We investigate the theoretical properties of the regularized covariance estimator comprehensively, including its regularization path, and proceed to develop an approach that adaptively determines the level of regularization that is required. Finally, we demonstrate the performance of the regularized estimator in decision-theoretic comparisons and in the financial portfolio optimization setting. The proposed approach has desirable properties, and can serve as a competitive procedure, especially when the sample size is small and when a well-conditioned estimator is required.

  2. Condition Number Regularized Covariance Estimation*

    Science.gov (United States)

    Won, Joong-Ho; Lim, Johan; Kim, Seung-Jean; Rajaratnam, Bala

    2012-01-01

    Estimation of high-dimensional covariance matrices is known to be a difficult problem, has many applications, and is of current interest to the larger statistics community. In many applications including so-called the “large p small n” setting, the estimate of the covariance matrix is required to be not only invertible, but also well-conditioned. Although many regularization schemes attempt to do this, none of them address the ill-conditioning problem directly. In this paper, we propose a maximum likelihood approach, with the direct goal of obtaining a well-conditioned estimator. No sparsity assumption on either the covariance matrix or its inverse are are imposed, thus making our procedure more widely applicable. We demonstrate that the proposed regularization scheme is computationally efficient, yields a type of Steinian shrinkage estimator, and has a natural Bayesian interpretation. We investigate the theoretical properties of the regularized covariance estimator comprehensively, including its regularization path, and proceed to develop an approach that adaptively determines the level of regularization that is required. Finally, we demonstrate the performance of the regularized estimator in decision-theoretic comparisons and in the financial portfolio optimization setting. The proposed approach has desirable properties, and can serve as a competitive procedure, especially when the sample size is small and when a well-conditioned estimator is required. PMID:23730197

  3. Recruiting and Retaining Summer Staff.

    Science.gov (United States)

    Crossen, Brian; Yerkes, Rita

    1998-01-01

    Recruiting of camp staff is challenged by economic and workplace restructuring, including business downsizing, part-time and temporary employment patterns, and generational attitude changes. Strategies for hiring and retaining staff include knowing what college-age workers want, marketing benefits, adopting new business strategies, and empowering…

  4. Staff Development Is Not Enough.

    Science.gov (United States)

    Hammons, Jim

    Staff development activities that affect professional ability must be coupled with efforts toward organizational development if two additional determinants of performance, employee motivation and organizational climate, are to be significantly improved. Indeed, emphasis on staff development alone may have negative effects in that such an approach…

  5. Staff Bullying in Australian Schools

    Science.gov (United States)

    Riley, Dan; Duncan, Deirdre J.; Edwards, John

    2011-01-01

    Purpose: The purpose of this paper is to estimate the prevalence of staff bullying in Australian schools, to identify bullies and targets and to examine some implications for school leaders in dealing with staff bullying. Design/methodology/approach: The quantitative research design survey instrument contained 11 demographic items, 44 questions of…

  6. 2011 Elections to Staff Council

    CERN Multimedia

    Staff Association

    2011-01-01

    Vote Elections to fill all seats in the Staff Council are being organized this month. Voting will begin on Monday 31 October. Make your voice heard and be many to elect the new Staff Council. By doing so, you will be encouraging the men and women who will  represent you over the next two years and they will doubtless appreciate your gratitude. More details on the elections can be found on the Staff Association web site. (http://association.web.cern.ch) Elections Timetable Monday 31 October, at noon start date for voting Monday 14 November, at noon closing date for voting Monday 21 November, publication of the results in Echo Tuesday 22 and Wednesday 29 November Staff Association Assizes Tuesday 6 December, at 10.00 a.m. first meeting of the new Staff Council and election of the new Executive Committee The voting procedure is monitored by the Election Committee. 

  7. Quotient Complexity of Regular Languages

    Directory of Open Access Journals (Sweden)

    Janusz Brzozowski

    2009-07-01

    Full Text Available The past research on the state complexity of operations on regular languages is examined, and a new approach based on an old method (derivatives of regular expressions is presented. Since state complexity is a property of a language, it is appropriate to define it in formal-language terms as the number of distinct quotients of the language, and to call it "quotient complexity". The problem of finding the quotient complexity of a language f(K,L is considered, where K and L are regular languages and f is a regular operation, for example, union or concatenation. Since quotients can be represented by derivatives, one can find a formula for the typical quotient of f(K,L in terms of the quotients of K and L. To obtain an upper bound on the number of quotients of f(K,L all one has to do is count how many such quotients are possible, and this makes automaton constructions unnecessary. The advantages of this point of view are illustrated by many examples. Moreover, new general observations are presented to help in the estimation of the upper bounds on quotient complexity of regular operations.

  8. Regular

    Indian Academy of Sciences (India)

    Ratanpal B S; Sharma Jaita

    2016-03-01

    The charged anisotropic star on paraboloidal space-time is reported by choosing a particular form of radial pressure and electric field intensity. The non-singular solution of Einstein–Maxwell system of equation has been derived and it is shown that the model satisfies all the physical plausibility conditions. It is observed that in the absence of electric field intensity, the model reducesto a particular case of uncharged Sharma and Ratanpal model. It is also observed that the parameter used in the electric field intensity directly affects mass of the star.

  9. Charge-regularization effects on polyelectrolytes

    Science.gov (United States)

    Muthukumar, Murugappan

    2012-02-01

    When electrically charged macromolecules are dispersed in polar solvents, their effective net charge is generally different from their chemical charges, due to competition between counterion adsorption and the translational entropy of dissociated counterions. The effective charge changes significantly as the experimental conditions change such as variations in solvent quality, temperature, and the concentration of added small electrolytes. This charge-regularization effect leads to major difficulties in interpreting experimental data on polyelectrolyte solutions and challenges in understanding the various polyelectrolyte phenomena. Even the most fundamental issue of experimental determination of molar mass of charged macromolecules by light scattering method has been difficult so far due to this feature. We will present a theory of charge-regularization of flexible polyelectrolytes in solutions and discuss the consequences of charge-regularization on (a) experimental determination of molar mass of polyelectrolytes using scattering techniques, (b) coil-globule transition, (c) macrophase separation in polyelectrolyte solutions, (c) phase behavior in coacervate formation, and (d) volume phase transitions in polyelectrolyte gels.

  10. Full L1-regularized Traction Force Microscopy over whole cells.

    Science.gov (United States)

    Suñé-Auñón, Alejandro; Jorge-Peñas, Alvaro; Aguilar-Cuenca, Rocío; Vicente-Manzanares, Miguel; Van Oosterwyck, Hans; Muñoz-Barrutia, Arrate

    2017-08-10

    Traction Force Microscopy (TFM) is a widespread technique to estimate the tractions that cells exert on the surrounding substrate. To recover the tractions, it is necessary to solve an inverse problem, which is ill-posed and needs regularization to make the solution stable. The typical regularization scheme is given by the minimization of a cost functional, which is divided in two terms: the error present in the data or data fidelity term; and the regularization or penalty term. The classical approach is to use zero-order Tikhonov or L2-regularization, which uses the L2-norm for both terms in the cost function. Recently, some studies have demonstrated an improved performance using L1-regularization (L1-norm in the penalty term) related to an increase in the spatial resolution and sensitivity of the recovered traction field. In this manuscript, we present a comparison between the previous two regularization schemes (relying in the L2-norm for the data fidelity term) and the full L1-regularization (using the L1-norm for both terms in the cost function) for synthetic and real data. Our results reveal that L1-regularizations give an improved spatial resolution (more important for full L1-regularization) and a reduction in the background noise with respect to the classical zero-order Tikhonov regularization. In addition, we present an approximation, which makes feasible the recovery of cellular tractions over whole cells on typical full-size microscope images when working in the spatial domain. The proposed full L1-regularization improves the sensitivity to recover small stress footprints. Moreover, the proposed method has been validated to work on full-field microscopy images of real cells, what certainly demonstrates it is a promising tool for biological applications.

  11. Efficient Hyperelastic Regularization for Registration

    DEFF Research Database (Denmark)

    Darkner, Sune; Hansen, Michael Sass; Larsen, Rasmus;

    2011-01-01

    For most image registration problems a smooth one-to-one mapping is desirable, a diffeomorphism. This can be obtained using priors such as volume preservation, certain kinds of elasticity or both. The key principle is to regularize the strain of the deformation which can be done through penalizat......For most image registration problems a smooth one-to-one mapping is desirable, a diffeomorphism. This can be obtained using priors such as volume preservation, certain kinds of elasticity or both. The key principle is to regularize the strain of the deformation which can be done through...... penalization of the eigen values of the stress tensor. We present a computational framework for regularization of image registration for isotropic hyper elasticity. We formulate an efficient and parallel scheme for computing the principal stain based for a given parameterization by decomposing the left Cauchy...

  12. Continuing education for hospice staff.

    Science.gov (United States)

    Conedera, F; Schoessler, M

    1985-06-01

    Hospice nursing is unique because of the philosophy and issues surrounding hospice care. Program planning for hospice staff follows basic principles. The real challenge in developing programs for orientation, continuing, and inservice education is using a format that will truly enable staff to meet the objectives. A lecture, programmed instruction, or video/slide format works well for the "nuts and bolts," but more creativity is needed for the other issues facing the hospice nurse--death, grief, symptom control, stress, team roles, and helping patients with options. Incorporating into the program some of the methods suggested will offer staff the opportunity to become involved in learning and make that learning more meaningful.

  13. Regular algebra and finite machines

    CERN Document Server

    Conway, John Horton

    2012-01-01

    World-famous mathematician John H. Conway based this classic text on a 1966 course he taught at Cambridge University. Geared toward graduate students of mathematics, it will also prove a valuable guide to researchers and professional mathematicians.His topics cover Moore's theory of experiments, Kleene's theory of regular events and expressions, Kleene algebras, the differential calculus of events, factors and the factor matrix, and the theory of operators. Additional subjects include event classes and operator classes, some regulator algebras, context-free languages, communicative regular alg

  14. The Staff Council, ready for the challenges of 2015

    CERN Multimedia

    Staff Association

    2015-01-01

    In order to fulfil its mission of representing CERN staff with the Management and the Member States in an optimal way, the Staff Council relies on the work of a number of commissions, amongst them employment conditions, pensions, legal matters, social security, health and safety and InFormAction (training, information and action). All of these commissions have as a goal to try and improve the employment conditions of CERN members of personnel. This is the case in particular in the context of the five-yearly review process, ending in December 2015 (5YR 2015). Let us recall that the objective of a five-yearly review is to ensure that the financial and social conditions offered by the Organisation favour recruitment from all Member States, and to retain and motivate staff necessary for the fulfilment of its mission. The convenor of each Commission reports regularly to the Staff Council and Executive Committee on the work performed in their group. The commissions are open to all members of the Staff Associati...

  15. Regularized Statistical Analysis of Anatomy

    DEFF Research Database (Denmark)

    Sjöstrand, Karl

    2007-01-01

    This thesis presents the application and development of regularized methods for the statistical analysis of anatomical structures. Focus is on structure-function relationships in the human brain, such as the connection between early onset of Alzheimer’s disease and shape changes of the corpus cal...

  16. Regular inference as vertex coloring

    NARCIS (Netherlands)

    Costa Florêncio, C.; Verwer, S.

    2012-01-01

    This paper is concerned with the problem of supervised learning of deterministic finite state automata, in the technical sense of identification in the limit from complete data, by finding a minimal DFA consistent with the data (regular inference). We solve this problem by translating it in its enti

  17. Regularized Generalized Structured Component Analysis

    Science.gov (United States)

    Hwang, Heungsun

    2009-01-01

    Generalized structured component analysis (GSCA) has been proposed as a component-based approach to structural equation modeling. In practice, GSCA may suffer from multi-collinearity, i.e., high correlations among exogenous variables. GSCA has yet no remedy for this problem. Thus, a regularized extension of GSCA is proposed that integrates a ridge…

  18. Regular inference as vertex coloring

    NARCIS (Netherlands)

    Costa Florêncio, C.; Verwer, S.

    2012-01-01

    This paper is concerned with the problem of supervised learning of deterministic finite state automata, in the technical sense of identification in the limit from complete data, by finding a minimal DFA consistent with the data (regular inference). We solve this problem by translating it in its

  19. 76 FR 3629 - Regular Meeting

    Science.gov (United States)

    2011-01-20

    ... meeting of the Board will be held at the offices of the Farm Credit Administration in McLean, Virginia, on...Lean, Virginia 22102. SUPPLEMENTARY INFORMATION: This meeting of the Board will be open to the ] public... CORPORATION Farm Credit System Insurance Corporation Board Regular Meeting SUMMARY: Notice is hereby given of...

  20. SENIOR STAFF ADVANCEMENT COMMITTEE (SSAC)

    CERN Document Server

    2000-01-01

    Composition and mandateThe Senior Staff Advancement Committee is composed of members nominated ad persona by the Director-General.The Committee examines proposals from Divisions concerning promotions to grade 13 in Career Path IX, changes of career path to Career Path IX and advancements to the exceptional grade in Career path VIII.The Director-General may consult the Committee on any matter related to senior staff careers.The Committee makes its recommendations to the Director-General.

  1. Design of Staff Assessment System

    OpenAIRE

    Vaníček, Josef

    2016-01-01

    This diploma thesis focuses on the topic of working assessment of staff. The objective is to create a new system evaluation and motivation of staff in the factory. The theoretical part of the individual chapters is focused on the evaluation system, evaluation methods, evaluation interview, system implementation, motivation and remuneration. The practical part describes the company and its system of evaluating and remuneration employees. Proposal for a new system was created by collecting info...

  2. A staff shortage in Canada?

    Energy Technology Data Exchange (ETDEWEB)

    Stoll, P. [Human Resources Development Canada, Quebec (Canada)

    1995-04-01

    Attrition of experienced staff, falling student enrolments and closure of university courses are symptoms of the contraction of the Canadian nuclear industry over the last two decades. It is not alone. A study carried out by Human Resources Development Canada, a government department, to forecast the demand for qualified nuclear staff in Canada over the next 15 years has reached similar conclusions to an OECD/NEA study of its members` future personnel requirements. (author).

  3. ON A REGULARIZATION OF INDEX 2 DIFFERENTIAL-ALGEBRAIC EQUATIONS WITH PROPERLY STATED LEADING TERM

    Institute of Scientific and Technical Information of China (English)

    Liu Hong; Song Yongzhong

    2011-01-01

    In this article, linear regular index 2 DAEs A(t)[D(t)x(t)]'+ B(t)x(t) = q(t)are considered. Using a decoupling technique, initial condition and boundary condition are properly formulated. Regular index 1 DAEs are obtained by a regulaxization method. We study the behavior of the solution of the regularization system via asymptotic expansions. The error analysis between the solutions of the DAEs and its regularization system is given.

  4. Why join the Staff Association

    CERN Multimedia

    Association du personnel

    2011-01-01

    Becoming a member of the Staff Association (SA) is above all a personal choice, showing that the joining person’s commitment and adherence to values such as solidarity, social cohesion, etc.In September, the SA launches a membership campaign to convince a maximum number to join, to inform, arouse interest and support. Posters, emails and individual contacts are part of the campaign programme, just like this editorial. As far as individual contacts are concerned, we ask you to give time and lend an ear to the delegates of your department in the Staff Council, who will approach you, in order to make an open and constructive discussion possible. Do not hesitate to ask questions and let them know your thoughts about the SA, as (constructive) criticism enables us to progress. The Staff Association and its role of collective representation The Staff Association, via its delegates, represents collectively all staff of the Organization before the Director-General and Member States. To do this, staff rep...

  5. Sparse regularization in limited angle tomography

    CERN Document Server

    Frikel, Jürgen

    2011-01-01

    We investigate the reconstruction problem of limited angle tomography. Such problems arise naturally in applications like digital breast tomosynthesis, dental tomography, electron microscopy etc. Since the acquired tomographic data is highly incomplete, the reconstruction problem is severely ill-posed and the traditional reconstruction methods, such as filtered backprojection (FBP), do not perform well in such situations. To stabilize the reconstruction procedure additional prior knowledge about the unknown object has to be integrated into the reconstruction process. In this work, we propose the use of the sparse regularization technique in combination with curvelets. We argue that this technique gives rise to an edge-preserving reconstruction. Moreover, we show that the dimension of the problem can be significantly reduced in the curvelet domain. To this end, we give a characterization of the kernel of limited angle Radon transform in terms of curvelets and derive a characterization of solutions obtained thr...

  6. Recursively-regular subdivisions and applications

    Directory of Open Access Journals (Sweden)

    Rafel Jaume

    2016-05-01

    Full Text Available We generalize regular subdivisions (polyhedral complexes resulting from the projection of the lower faces of a polyhedron introducing the class of recursively-regular subdivisions. Informally speaking, a recursively-regular subdivision is a subdivision that can be obtained by splitting some faces of a regular subdivision by other regular subdivisions (and continue recursively. We also define the finest regular coarsening and the regularity tree of a polyhedral complex. We prove that recursively-regular subdivisions are not necessarily connected by flips and that they are acyclic with respect to the in-front relation. We show that the finest regular coarsening of a subdivision can be efficiently computed, and that whether a subdivision is recursively regular can be efficiently decided. As an application, we also extend a theorem known since 1981 on illuminating space by cones and present connections of recursive regularity to tensegrity theory and graph-embedding problems.     

  7. Implementing effective staff education about advance directives.

    Science.gov (United States)

    DesRosiers, M; Navin, P

    1997-01-01

    The Patient Self-Determination Act of 1990 guarantees the right to refuse medical or surgical treatment and the right to draft advance directives. This review of the current literature provides those in nursing staff development and inservice education with an overview of advance directives and their implications for nursing education and practice. Possible core subjects for inclusion in planned, purposeful, advance directive education programs are examined, including cultural sensitivity, facilitator skills, interviewing techniques, legal information, patient autonomy, and reasoning and decision making. This review provides a platform for future research.

  8. Structured Sparsity Regularization Approach to the EEG Inverse Problem

    DEFF Research Database (Denmark)

    Montoya-Martinez, Jair; Artes-Rodriguez, Antonio; Hansen, Lars Kai

    2012-01-01

    Localization of brain activity involves solving the EEG inverse problem, which is an undetermined ill-posed problem. We propose a novel approach consisting in estimating, using structured sparsity regularization techniques, the Brain Electrical Sources (BES) matrix directly in the spatio-temporal......Localization of brain activity involves solving the EEG inverse problem, which is an undetermined ill-posed problem. We propose a novel approach consisting in estimating, using structured sparsity regularization techniques, the Brain Electrical Sources (BES) matrix directly in the spatio...

  9. Models with hidden regular variation: Generation and detection

    Directory of Open Access Journals (Sweden)

    Bikramjit Das

    2015-12-01

    Full Text Available We review the notions of multivariate regular variation (MRV and hidden regular variation (HRV for distributions of random vectors and then discuss methods for generating models exhibiting both properties concentrating on the non-negative orthant in dimension two. Furthermore we suggest diagnostic techniques that detect these properties in multivariate data and indicate when models exhibiting both MRV and HRV are plausible fits for the data. We illustrate our techniques on simulated data, as well as two real Internet data sets.

  10. General inverse problems for regular variation

    DEFF Research Database (Denmark)

    Damek, Ewa; Mikosch, Thomas Valentin; Rosinski, Jan

    2014-01-01

    Regular variation of distributional tails is known to be preserved by various linear transformations of some random structures. An inverse problem for regular variation aims at understanding whether the regular variation of a transformed random object is caused by regular variation of components ...

  11. Regular Motions of Resonant Asteroids

    Science.gov (United States)

    Ferraz-Mello, S.

    1990-11-01

    RESUMEN. Se revisan resultados analiticos relativos a soluciones regulares del problema asteroidal eliptico promediados en la vecindad de una resonancia con jupiten Mencionamos Ia ley de estructura para libradores de alta excentricidad, la estabilidad de los centros de liberaci6n, las perturbaciones forzadas por la excentricidad de jupiter y las 6rbitas de corotaci6n. ABSTRAC This paper reviews analytical results concerning the regular solutions of the elliptic asteroidal problem averaged in the neighbourhood of a resonance with jupiter. We mention the law of structure for high-eccentricity librators, the stability of the libration centers, the perturbations forced by the eccentricity ofjupiter and the corotation orbits. Key words: ASThROIDS

  12. Maximum mutual information regularized classification

    KAUST Repository

    Wang, Jim Jing-Yan

    2014-09-07

    In this paper, a novel pattern classification approach is proposed by regularizing the classifier learning to maximize mutual information between the classification response and the true class label. We argue that, with the learned classifier, the uncertainty of the true class label of a data sample should be reduced by knowing its classification response as much as possible. The reduced uncertainty is measured by the mutual information between the classification response and the true class label. To this end, when learning a linear classifier, we propose to maximize the mutual information between classification responses and true class labels of training samples, besides minimizing the classification error and reducing the classifier complexity. An objective function is constructed by modeling mutual information with entropy estimation, and it is optimized by a gradient descend method in an iterative algorithm. Experiments on two real world pattern classification problems show the significant improvements achieved by maximum mutual information regularization.

  13. Central charges in regular mechanics

    CERN Document Server

    Cabo-Montes de Oca, Alejandro; Villanueva, V M

    1997-01-01

    We consider the algebra associated to a group of transformations which are symmetries of a regular mechanical system (i.e. system free of constraints). For time dependent coordinate transformations we show that a central extension may appear at the classical level which is coordinate and momentum independent. A cochain formalism naturally arises in the argument and extends the usual configuration space cochain concepts to phase space.

  14. Fast regularized image interpolation method

    Institute of Scientific and Technical Information of China (English)

    Hongchen Liu; Yong Feng; Linjing Li

    2007-01-01

    The regularized image interpolation method is widely used based on the vector interpolation model in which down-sampling matrix has very large dimension and needs large storage consumption and higher computation complexity. In this paper, a fast algorithm for image interpolation based on the tensor product of matrices is presented, which transforms the vector interpolation model to matrix form. The proposed algorithm can extremely reduce the storage requirement and time consumption. The simulation results verify their validity.

  15. Estimating signal loss in regularized GRACE gravity field solutions

    Science.gov (United States)

    Swenson, S. C.; Wahr, J. M.

    2011-05-01

    Gravity field solutions produced using data from the Gravity Recovery and Climate Experiment (GRACE) satellite mission are subject to errors that increase as a function of increasing spatial resolution. Two commonly used techniques to improve the signal-to-noise ratio in the gravity field solutions are post-processing, via spectral filters, and regularization, which occurs within the least-squares inversion process used to create the solutions. One advantage of post-processing methods is the ability to easily estimate the signal loss resulting from the application of the spectral filter by applying the filter to synthetic gravity field coefficients derived from models of mass variation. This is a critical step in the construction of an accurate error budget. Estimating the amount of signal loss due to regularization, however, requires the execution of the full gravity field determination process to create synthetic instrument data; this leads to a significant cost in computation and expertise relative to post-processing techniques, and inhibits the rapid development of optimal regularization weighting schemes. Thus, while a number of studies have quantified the effects of spectral filtering, signal modification in regularized GRACE gravity field solutions has not yet been estimated. In this study, we examine the effect of one regularization method. First, we demonstrate that regularization can in fact be performed as a post-processing step if the solution covariance matrix is available. Regularization then is applied as a post-processing step to unconstrained solutions from the Center for Space Research (CSR), using weights reported by the Centre National d'Etudes Spatiales/Groupe de Recherches de geodesie spatiale (CNES/GRGS). After regularization, the power spectra of the CSR solutions agree well with those of the CNES/GRGS solutions. Finally, regularization is performed on synthetic gravity field solutions derived from a land surface model, revealing that in

  16. Efficient Hyperelastic Regularization for Registration

    DEFF Research Database (Denmark)

    Darkner, Sune; Hansen, Michael S; Larsen, Rasmus;

    2011-01-01

    For most image registration problems a smooth one-to-one mapping is desirable, a diffeomorphism. This can be obtained using priors such as volume preservation, certain kinds of elasticity or both. The key principle is to regularize the strain of the deformation which can be done through penalizat......For most image registration problems a smooth one-to-one mapping is desirable, a diffeomorphism. This can be obtained using priors such as volume preservation, certain kinds of elasticity or both. The key principle is to regularize the strain of the deformation which can be done through...... penalization of the eigen values of the stress tensor. We present a computational framework for regularization of image registration for isotropic hyper elasticity. We formulate an efficient and parallel scheme for computing the principal stain based for a given parameterization by decomposing the left Cauchy...... elastic priors such at the Saint Vernant Kirchoff model, the Ogden material model or Riemanian elasticity. We exemplify the approach through synthetic registration and special tests as well as registration of different modalities; 2D cardiac MRI and 3D surfaces of the human ear. The artificial examples...

  17. NO to sacrificing future staff!

    CERN Multimedia

    Staff Association

    2011-01-01

    During our public meetings last week, we reviewed several subjects. However, the most urgent one today is the 2nd package of measures for our Pension Fund. In our previous issue, we devoted a long article to the Management’s plan for staff recruited from January 2012. A disaster! As we announced at our meetings, the Staff Association will organize a referendum at the beginning of April. For the message to be heard it is vital that as many staff as possible take part. By voting you will express your support to your staff representatives to stand in the way of these unacceptable measures. It is a matter of urgency that the staff makes their voice heard. Time is short, the decisions will be made in June. The future of our Organization is as stake. This is our future colleagues we are talking about. We must prevent this sacrifice. They must be welcomed in such a manner that there is no uneasiness between us. They must be made to feel welcome in their new family, CERN, our CERN. That they should pay an ...

  18. From Dimensional to Cut-Off Regularization

    CERN Document Server

    Dillig, M

    2006-01-01

    We extent the standard approach of dimensional regularization of Feynman diagrams: we replace the transition to lower dimensions by a 'natural' cut-off regulator. Introducing an external regulator of mass Lambda^(2e), we regain in the limit e -> 0 and e > 0 the results of dimensional and cut-off regularization, respectively. We demonstrate the versatility and adequacy of the different regularization schemes for practical examples (such as non covariant regularization, the axial anomaly or regularization in effective field theories).

  19. Staff Association Handbook, 1974-75.

    Science.gov (United States)

    Montgomery Coll. Staff Association, Takoma Park, MD.

    This handbook provides a list of Staff Senate and Committee members of the Staff Association of Montgomery College, a copy of the bylaws of the association, and sections of the college's "Policies and Procedures Manual" that affect staff employees. These sections of the manual pertain to: Administrative and Staff Communication;…

  20. Resolution of the Staff Council

    CERN Document Server

    Staff Association

    2015-01-01

    You were many to attend the public information meetings organised in October and we thank you for your interest. In this decision phase of the current Five-Yearly Review of our employment conditions they provided an opportunity to review the Management proposals in detail. They were a moment of exchange also on the various topics under review, and your comments were many and very valuable. Meeting on Thursday 29th October, the Staff Council discussed once more these proposals. It considered that the "package" of proposed measures is not balanced enough in its current form. It decided to formulate additional requests to the Management, relating mainly to the effects of the introduction of the proposed new career system. The resolution adopted this morning also implies that the consultation of staff, originally foreseen next week, is postponed. The staff Council will reconvene in a special session on Thursday, 5th November to reassess its position depending on the progress made regarding its d...

  1. Tomographic laser absorption spectroscopy using Tikhonov regularization.

    Science.gov (United States)

    Guha, Avishek; Schoegl, Ingmar

    2014-12-01

    The application of tunable diode laser absorption spectroscopy (TDLAS) to flames with nonhomogeneous temperature and concentration fields is an area where only few studies exist. Experimental work explores the performance of tomographic reconstructions of species concentration and temperature profiles from wavelength-modulated TDLAS measurements within the plume of an axisymmetric McKenna burner. Water vapor transitions at 1391.67 and 1442.67 nm are probed using calibration-free wavelength modulation spectroscopy with second harmonic detection (WMS-2f). A single collimated laser beam is swept parallel to the burner surface, where scans yield pairs of line-of-sight (LOS) data at multiple radial locations. Radial profiles of absorption data are reconstructed using Tikhonov regularized Abel inversion, which suppresses the amplification of experimental noise that is typically observed for reconstructions with high spatial resolution. Based on spectral data reconstructions, temperatures and mole fractions are calculated point-by-point. Here, a least-squares approach addresses difficulties due to modulation depths that cannot be universally optimized due to a nonuniform domain. Experimental results show successful reconstructions of temperature and mole fraction profiles based on two-transition, nonoptimally modulated WMS-2f and Tikhonov regularized Abel inversion, and thus validate the technique as a viable diagnostic tool for flame measurements.

  2. Regularized quadratic cost function for oriented fringe-pattern filtering.

    Science.gov (United States)

    Villa, Jesús; Quiroga, Juan Antonio; De la Rosa, Ismael

    2009-06-01

    We use the regularization theory in a Bayesian framework to derive a quadratic cost function for denoising fringe patterns. As prior constraints for the regularization problem, we propose a Markov random field model that includes information about the fringe orientation. In our cost function the regularization term imposes constraints to the solution (i.e., the filtered image) to be smooth only along the fringe's tangent direction. In this way as the fringe information and noise are conveniently separated in the frequency space, our technique avoids blurring the fringes. The attractiveness of the proposed filtering method is that the minimization of the cost function can be easily implemented using iterative methods. To show the performance of the proposed technique we present some results obtained by processing simulated and real fringe patterns.

  3. Regularized degenerate multi-solitons

    CERN Document Server

    Correa, Francisco

    2016-01-01

    We report complex PT-symmetric multi-soliton solutions to the Korteweg de-Vries equation that asymptotically contain one-soliton solutions, with each of them possessing the same amount of finite real energy. We demonstrate how these solutions originate from degenerate energy solutions of the Schroedinger equation. Technically this is achieved by the application of Darboux-Crum transformations involving Jordan states with suitable regularizing shifts. Alternatively they may be constructed from a limiting process within the context Hirota's direct method or on a nonlinear superposition obtained from multiple Baecklund transformations. The proposed procedure is completely generic and also applicable to other types of nonlinear integrable systems.

  4. Academic Training Lecture - Regular Programme

    CERN Multimedia

    PH Department

    2011-01-01

    Regular Lecture Programme 9 May 2011 ACT Lectures on Detectors - Inner Tracking Detectors by Pippa Wells (CERN) 10 May 2011 ACT Lectures on Detectors - Calorimeters (2/5) by Philippe Bloch (CERN) 11 May 2011 ACT Lectures on Detectors - Muon systems (3/5) by Kerstin Hoepfner (RWTH Aachen) 12 May 2011 ACT Lectures on Detectors - Particle Identification and Forward Detectors by Peter Krizan (University of Ljubljana and J. Stefan Institute, Ljubljana, Slovenia) 13 May 2011 ACT Lectures on Detectors - Trigger and Data Acquisition (5/5) by Dr. Brian Petersen (CERN) from 11:00 to 12:00 at CERN ( Bldg. 222-R-001 - Filtration Plant )

  5. Regularization methods in Banach spaces

    CERN Document Server

    Schuster, Thomas; Hofmann, Bernd; Kazimierski, Kamil S

    2012-01-01

    Regularization methods aimed at finding stable approximate solutions are a necessary tool to tackle inverse and ill-posed problems. Usually the mathematical model of an inverse problem consists of an operator equation of the first kind and often the associated forward operator acts between Hilbert spaces. However, for numerous problems the reasons for using a Hilbert space setting seem to be based rather on conventions than on an approprimate and realistic model choice, so often a Banach space setting would be closer to reality. Furthermore, sparsity constraints using general Lp-norms or the B

  6. Motivating Staff, Parents, and Children.

    Science.gov (United States)

    Jones, Cynthia Cavenaugh

    Two motivational theories considered particularly useful in administering early childhood programs are discussed, and guidelines for motivating staff, parents, and children are provided. First, the two-factor theory of motivation within organizations, as outlined by Herzberg (1959), is described. Offered in this section are a list of motivators…

  7. Top 10 Staff Survival Tips.

    Science.gov (United States)

    O'Brien, Laurie

    1995-01-01

    Tips for camp staff on how to survive summer camp include not giving campers sugary drinks before bedtime, setting behavior limits with campers, setting an example by following camp rules, getting enough rest, being fair and consistent, controlling anger, being accountable for actions, asking questions, and being flexible. (LP)

  8. 2009 Elections to Staff Council

    CERN Multimedia

    Association du personnel

    2009-01-01

    Stand for election Until now you may have been unsure whether to stand for election. If you would like to serve the Staff Association’s ideal of excellence, then take the plunge and become a candidate now. To do this, go to our web site where a short flash animation1 explains the role of a delegate.

  9. Motivating Staff, Parents, and Children.

    Science.gov (United States)

    Jones, Cynthia Cavenaugh

    Two motivational theories considered particularly useful in administering early childhood programs are discussed, and guidelines for motivating staff, parents, and children are provided. First, the two-factor theory of motivation within organizations, as outlined by Herzberg (1959), is described. Offered in this section are a list of motivators…

  10. A Unified Approach for Solving Nonlinear Regular Perturbation Problems

    Science.gov (United States)

    Khuri, S. A.

    2008-01-01

    This article describes a simple alternative unified method of solving nonlinear regular perturbation problems. The procedure is based upon the manipulation of Taylor's approximation for the expansion of the nonlinear term in the perturbed equation. An essential feature of this technique is the relative simplicity used and the associated unified…

  11. Density estimators in particle hydrodynamics - DTFE versus regular SPH

    NARCIS (Netherlands)

    Pelupessy, FI; Schaap, WE; van de Weygaert, R

    2003-01-01

    We present the results of a study comparing density maps reconstructed by the Delaunay Tessellation Field Estimator (DTFE) and by regular SPH kernel-based techniques. The density maps are constructed from the outcome of an SPH particle hydrodynamics simulation of a multiphase interstellar medium. Th

  12. Regularization for Atmospheric Temperature Retrieval Problems

    Science.gov (United States)

    Velez-Reyes, Miguel; Galarza-Galarza, Ruben

    1997-01-01

    Passive remote sensing of the atmosphere is used to determine the atmospheric state. A radiometer measures microwave emissions from earth's atmosphere and surface. The radiance measured by the radiometer is proportional to the brightness temperature. This brightness temperature can be used to estimate atmospheric parameters such as temperature and water vapor content. These quantities are of primary importance for different applications in meteorology, oceanography, and geophysical sciences. Depending on the range in the electromagnetic spectrum being measured by the radiometer and the atmospheric quantities to be estimated, the retrieval or inverse problem of determining atmospheric parameters from brightness temperature might be linear or nonlinear. In most applications, the retrieval problem requires the inversion of a Fredholm integral equation of the first kind making this an ill-posed problem. The numerical solution of the retrieval problem requires the transformation of the continuous problem into a discrete problem. The ill-posedness of the continuous problem translates into ill-conditioning or ill-posedness of the discrete problem. Regularization methods are used to convert the ill-posed problem into a well-posed one. In this paper, we present some results of our work in applying different regularization techniques to atmospheric temperature retrievals using brightness temperatures measured with the SSM/T-1 sensor. Simulation results are presented which show the potential of these techniques to improve temperature retrievals. In particular, no statistical assumptions are needed and the algorithms were capable of correctly estimating the temperature profile corner at the tropopause independent of the initial guess.

  13. Near-Regular Structure Discovery Using Linear Programming

    KAUST Repository

    Huang, Qixing

    2014-06-02

    Near-regular structures are common in manmade and natural objects. Algorithmic detection of such regularity greatly facilitates our understanding of shape structures, leads to compact encoding of input geometries, and enables efficient generation and manipulation of complex patterns on both acquired and synthesized objects. Such regularity manifests itself both in the repetition of certain geometric elements, as well as in the structured arrangement of the elements. We cast the regularity detection problem as an optimization and efficiently solve it using linear programming techniques. Our optimization has a discrete aspect, that is, the connectivity relationships among the elements, as well as a continuous aspect, namely the locations of the elements of interest. Both these aspects are captured by our near-regular structure extraction framework, which alternates between discrete and continuous optimizations. We demonstrate the effectiveness of our framework on a variety of problems including near-regular structure extraction, structure-preserving pattern manipulation, and markerless correspondence detection. Robustness results with respect to geometric and topological noise are presented on synthesized, real-world, and also benchmark datasets. © 2014 ACM.

  14. Robust integral stabilization of regular linear systems

    Institute of Scientific and Technical Information of China (English)

    XU Chengzheng; FENG Dexing

    2004-01-01

    We consider regular systems with control and observation. We prove some necessary and sufficient condition for an exponentially stable regular system to admit an integral stabilizing controller. We propose also some robust integral controllers when they exist.

  15. Generalization performance of regularized neural network models

    DEFF Research Database (Denmark)

    Larsen, Jan; Hansen, Lars Kai

    1994-01-01

    Architecture optimization is a fundamental problem of neural network modeling. The optimal architecture is defined as the one which minimizes the generalization error. This paper addresses estimation of the generalization performance of regularized, complete neural network models. Regularization...

  16. A FAST CONVERGENT METHOD OF ITERATED REGULARIZATION

    Institute of Scientific and Technical Information of China (English)

    Huang Xiaowei; Wu Chuansheng; Wu Di

    2009-01-01

    This article presents a fast convergent method of iterated regularization based on the idea of Landweber iterated regularization, and a method for a-posteriori choice by the Morozov discrepancy principle and the optimum asymptotic convergence order of the regularized solution is obtained. Numerical test shows that the method of iterated regu-larization can quicken the convergence speed and reduce the calculation burden efficiently.

  17. Weakly and Strongly Regular Near-rings

    Institute of Scientific and Technical Information of China (English)

    N.Argac; N.J.Groenewald

    2005-01-01

    In this paper, we prove some basic properties of left weakly regular near-rings.We give an affirmative answer to the question whether a left weakly regular near-ring with left unity and satisfying the IFP is also right weakly regular. In the last section, we use among others left 0-prime and left completely prime ideals to characterize strongly regular near-rings.

  18. MAXIMAL POINTS OF A REGULAR TRUTH FUNCTION

    Science.gov (United States)

    Every canonical linearly separable truth function is a regular function, but not every regular truth function is linearly separable. The most...promising method of determining which of the regular truth functions are linearly separable r quires finding their maximal and minimal points. In this...report is developed a quick, systematic method of finding the maximal points of any regular truth function in terms of its arithmetic invariants. (Author)

  19. The importance of worker, staff and patient participation in hospital evaluation.

    Science.gov (United States)

    Kotaka, F; Manildo, F

    1999-01-01

    Considering the frequent changes that occur in hospitals and the necessity to find methods and techniques that help their evaluation, this study's objective is to investigate the extents and the limitations of workers and users participation in hospitals' evaluation. Surveys were carried out in Hospital-A and B, applying Post Occupancy Evaluation (POE) methods and techniques, using questionnaires, that were applied to all personnel and regular staff of Hospital-A and Hospital-B, as well as to 300 patients of Hospital-B. Both are general hospitals and are situated in São Paulo State, in Brazil. Hospital-A has 180 beds, 9,000 m2 of area constructed, 550 personnel. Hospital-B, 150 beds, 13,000 m2 of area constructed, 720 personnel. In Hospital-A, 68.7% of the personnel answered the questionnaires, in Hospital-B, 64.4% of the personnel and 61.3% of the patients answered the questionnaire. The results of the study as outlined in this paper will indicate that hospital evaluation by personnel and patients demonstrates the applicability and sensitivity of their participation. The authors, as a consequence, recommend that personnel and patients be consulted in hospital evaluation programmes which would act as a source of feedback for renovating existing as well as designing of new hospitals.

  20. Natural frequency of regular basins

    Science.gov (United States)

    Tjandra, Sugih S.; Pudjaprasetya, S. R.

    2014-03-01

    Similar to the vibration of a guitar string or an elastic membrane, water waves in an enclosed basin undergo standing oscillatory waves, also known as seiches. The resonant (eigen) periods of seiches are determined by water depth and geometry of the basin. For regular basins, explicit formulas are available. Resonance occurs when the dominant frequency of external force matches the eigen frequency of the basin. In this paper, we implement the conservative finite volume scheme to 2D shallow water equation to simulate resonance in closed basins. Further, we would like to use this scheme and utilizing energy spectra of the recorded signal to extract resonant periods of arbitrary basins. But here we first test the procedure for getting resonant periods of a square closed basin. The numerical resonant periods that we obtain are comparable with those from analytical formulas.

  1. Regularized degenerate multi-solitons

    Science.gov (United States)

    Correa, Francisco; Fring, Andreas

    2016-09-01

    We report complex {P}{T} -symmetric multi-soliton solutions to the Korteweg de-Vries equation that asymptotically contain one-soliton solutions, with each of them possessing the same amount of finite real energy. We demonstrate how these solutions originate from degenerate energy solutions of the Schrödinger equation. Technically this is achieved by the application of Darboux-Crum transformations involving Jordan states with suitable regularizing shifts. Alternatively they may be constructed from a limiting process within the context Hirota's direct method or on a nonlinear superposition obtained from multiple Bäcklund transformations. The proposed procedure is completely generic and also applicable to other types of nonlinear integrable systems.

  2. Modeling polycrystals with regular polyhedra

    Directory of Open Access Journals (Sweden)

    Paulo Rangel Rios

    2006-06-01

    Full Text Available Polycrystalline structure is of paramount importance to materials science and engineering. It provides an important example of a space-filling irregular network structure that also occurs in foams as well as in certain biological tissues. Therefore, seeking an accurate description of the characteristics of polycrystals is of fundamental importance. Recently, one of the authors (MEG published a paper in which a method was devised of representation of irregular networks by regular polyhedra with curved faces. In Glicksman's method a whole class of irregular polyhedra with a given number of faces, N, is represented by a single symmetrical polyhedron with N curved faces. This paper briefly describes the topological and metric properties of these special polyhedra. They are then applied to two important problems of irregular networks: the dimensionless energy 'cost' of irregular networks, and the derivation of a 3D analogue of the von Neumann-Mullins equation for the growth rate of grains in a polycrystal.

  3. REGULARITY FOR CERTAIN QUASILINEARELLIPTIC SYSTEMS OF DIVERGENCESTRUCTURE

    Institute of Scientific and Technical Information of China (English)

    周树清; 冉启康

    2001-01-01

    The regularity of the gradient of H lder continuous solutions of quasi-linear elliptic systems of the form -Dj(aij(x, u, Du)Diuk) = -Difik + gkis investigated. Partial regularity and ε-regularity are shown to hold under the structural assumption-Dj(aij(x,u, Du)) = hi ∈ L∞.

  4. Technology Corner: A Regular Expression Training App

    Directory of Open Access Journals (Sweden)

    Nick Flor

    2012-12-01

    Full Text Available Regular expressions enable digital forensic analysts to find information in files. The best way for an analyst to become proficient in writing regular expressions is to practice. This paper presents the code for an app that allows an analyst to practice writing regular expressions.

  5. Counting Rooted Nearly 2-regular Planar Maps

    Institute of Scientific and Technical Information of China (English)

    郝荣霞; 蔡俊亮

    2004-01-01

    The number of rooted nearly 2-regular maps with the valency of rootvertex, the number of non-rooted vertices and the valency of root-face as three parameters is obtained. Furthermore, the explicit expressions of the special cases including loopless nearly 2-regular maps and simple nearly 2-regular maps in terms of the above three parameters are derived.

  6. On the Construction of Regular Orthocryptogroups

    Institute of Scientific and Technical Information of China (English)

    Xiang Zhi KONG

    2002-01-01

    The aim of this paper is to study regular orthocryptogroups. After obtaining some charac-terizations of such semigroups, we establish the construction theorem of regular orthocryptogroups. Asan application, we give the construction theorem of right quasi-normal orthocryptogroups and studyhomomorphisms between two regular orthocryptogroups.

  7. REGULAR RELATIONS AND MONOTONE NORMAL ORDERED SPACES

    Institute of Scientific and Technical Information of China (English)

    XU XIAOQUAN; LIU YINGMING

    2004-01-01

    In this paper the classical theorem of Zareckii about regular relations is generalized and an intrinsic characterization of regularity is obtained. Based on the generalized Zareckii theorem and the intrinsic characterization of regularity, the authors give a characterization of monotone normality of ordered spaces. A new proof of the UrysohnNachbin lemma is presented which is quite different from the classical one.

  8. Regular Pentagons and the Fibonacci Sequence.

    Science.gov (United States)

    French, Doug

    1989-01-01

    Illustrates how to draw a regular pentagon. Shows the sequence of a succession of regular pentagons formed by extending the sides. Calculates the general formula of the Lucas and Fibonacci sequences. Presents a regular icosahedron as an example of the golden ratio. (YP)

  9. Views of Academic Staff on Erasmus Teaching Staff Mobility: The Case of Akdeniz University

    Directory of Open Access Journals (Sweden)

    Gamze KASALAK

    2013-01-01

    Full Text Available The aim of this research is to describe the views of the academic staff working at Akdeniz University about the Erasmus Teaching Staff Mobility Programme. This study is a qualitative research. The study was designed as a holistic single case descriptive study. The data for this research were obtained from seven voluntary academic staff who experienced this programme. Semi-structured interview was used as the data collection tool. The data collected were figured out using frequency analysis technique which is included in descriptive analysis of qualitative research. At the end of the study, it can be said that participants have joined the programme for creating mutual projects, gaining abroad experience and they had expectations for strengthening the relationship with the hosting university; they had the opportunity to recognize different languages, different countries, universities, cultures, instructors and education systems; they encountered some problems like programme duration, transportation, foreign language, nutrition, bureaucratic problems, climate and information sharing and they offered some suggestions such as expanding the duration of the programme, increasing the amount of the grant and the number of participants.

  10. What Residence Hall Staff Need to Know about Dealing with Death.

    Science.gov (United States)

    Jacobs, Bonita; Towns, James E.

    1984-01-01

    Emphasizes the responsibility for residence hall staff to understand the grief process. An adaptation of Kubler-Ross's stages of death has produced helpful techniques for successfully accepting the death. Through understanding these principles, staff can become aware of the grief process and can assist residents. (JAC)

  11. Spatially-Variant Tikhonov Regularization for Double-Difference Waveform Inversion

    Energy Technology Data Exchange (ETDEWEB)

    Lin, Youzuo [Los Alamos National Laboratory; Huang, Lianjie [Los Alamos National Laboratory; Zhang, Zhigang [Los Alamos National Laboratory

    2011-01-01

    Double-difference waveform inversion is a potential tool for quantitative monitoring for geologic carbon storage. It jointly inverts time-lapse seismic data for changes in reservoir geophysical properties. Due to the ill-posedness of waveform inversion, it is a great challenge to obtain reservoir changes accurately and efficiently, particularly when using time-lapse seismic reflection data. Regularization techniques can be utilized to address the issue of ill-posedness. The regularization parameter controls the smoothness of inversion results. A constant regularization parameter is normally used in waveform inversion, and an optimal regularization parameter has to be selected. The resulting inversion results are a trade off among regions with different smoothness or noise levels; therefore the images are either over regularized in some regions while under regularized in the others. In this paper, we employ a spatially-variant parameter in the Tikhonov regularization scheme used in double-difference waveform tomography to improve the inversion accuracy and robustness. We compare the results obtained using a spatially-variant parameter with those obtained using a constant regularization parameter and those produced without any regularization. We observe that, utilizing a spatially-variant regularization scheme, the target regions are well reconstructed while the noise is reduced in the other regions. We show that the spatially-variant regularization scheme provides the flexibility to regularize local regions based on the a priori information without increasing computational costs and the computer memory requirement.

  12. 2015 Elections to Staff Council

    CERN Document Server

    Staff Asscociation

    2015-01-01

    Make your voice heard, support your candidates! Be many to vote and to elect the new Staff Council. By doing so, you will be encouraging the men and women who will represent you over the next two years and they will without doubt appreciate your gratitude. The voting takes place from the 26th of October to the 9th of November, at noon at https://ap-vote.web.cern.ch/elections-2015.   Elections Timetable Monday 9 November, at noon Closing date for voting Monday 16 and Monday 23 November, publication of the results in Echo Tuesday 8 December, at 10.00 a.m. first meeting of the new Staff Council and election of the new Executive Committee The voting procedure will be monitored by the Election Committee, which is also in charge of announcing the results in Echo on 16 and 24 November. Candidates for the 2015 elections

  13. Towards mobile staff members management

    Science.gov (United States)

    Encheva, Sylvia

    2017-07-01

    Todays project management requires a number of abilities which involve finding quick solutions to shortage of staff members with possession of specific qualities. When persons with team responsibilities are under pressure or due to various circumstances are unable to perform exhaustive search in databases, an interactive visualization tool can come in quite handy in finding good solutions unforeseen occurrences. In particular we propose application of selected graphs for facilitating mobile human resource management.

  14. 2015 Elections to Staff Council

    CERN Multimedia

    Staff Association

    2015-01-01

    Elections Timetable Monday 21 September, at noon Start date for receipt of the application Friday 16 October, at noon Closing date for receipt of the applications Monday 26 October, at noon Start date for voting Monday 9 November, at noon Closing date for voting Monday 16 and Monday 23 November, publication of the results in Echo Monday 23 and Tuesday 24 November Staff Association Assizes Tuesday 1st December, at 10.00 a.m. first meeting of the new Staff Council and election of the new Executive Committee The voting procedure will be monitored by the Election Committee, which is also in charge of announcing the results in Echo on 16 and 24 November. During its meeting of March 17 2015, the Staff Council approved the election rules, which define the allocation of seats in each department, as follows:   Number of seats in the electoral colleges Departments BE EN TE DG/DGS FP GS HR/PF IT PH Career paths AA - D 2 3 3 1 1 2 1 1 2 Career paths E - G 2 2 2 1 1 1 1 2 3   ...

  15. 2015 Elections to Staff Council

    CERN Multimedia

    Staff Association

    2015-01-01

    Elections Timetable Monday 26 October, at noon Start date for voting Monday 9 November, at noon Closing date for voting Monday 16 and Monday 23 November, publication of the results in Echo Monday 23 and Tuesday 24 November Staff Association Assizes Tuesday 1st December, at 10.00 a.m. first meeting of the new Staff Council and election of the new Executive Committee The voting procedure will be monitored by the Election Committee, which is also in charge of announcing the results in Echo on 16 and 24 November. During its meeting of March 17 2015, the Staff Council approved the election rules, which define the allocation of seats in each department, as follows:   Number of seats in the electoral colleges Departments BE EN TE DG/DGS FP GS HR/PF IT PH Career paths AA - D 2 3 3 1 1 2 1 1 2 Career paths E - G 2 2 2 1 1 1 1 2 3   Global CERN Career paths AA - G 14     Number of seats for fellows representatives Global CERN 5 For more informat...

  16. Competency assessment of nursing staff.

    Science.gov (United States)

    Whelan, Lynn

    2006-01-01

    Changes in the healthcare industry have created great challenges for leaders of acute-care organizations. One of the greatest challenges is ensuring a competent nursing staff to care for patients within this changing environment (Boylan & Westra, 1998). Patients are more acutely ill and have shorter lengths of stay, placing greater demands on nurses who must demonstrate competency in caring for increasingly complex patients in a continually changing healthcare environment. Competency is defined as "the knowledge, skills, ability and behaviors that a person possesses in order to perform tasks correctly and skillfully" (O'Shea, 2002, p. 175). Competency assessment involves more than a checklist and a test. Hospitals are required to assess, maintain, demonstrate, track, and improve the competence of the staff. Competency assessment is an ongoing process of initial development, maintenance of knowledge and skills, educational consultation, remediation, and redevelopment. Methods to assess competencies include competency fairs, Performance Based Development System and online programs. Certain key people should be involved in the development of competencies. The department managers can give input related to department-specific competencies. Experienced staff members can provide valuable insight into the competencies that need to be assessed. Educators should be involved for providing the input for the methods used to validate competencies. Competencies are an important part of the work world. They are a part of a continual process to help ensure that the organization provides a high-quality care to its customers and patients.

  17. Effect of regularization parameters on geophysical reconstruction

    Institute of Scientific and Technical Information of China (English)

    Zhou Hui; Wang Zhaolei; Qiu Dongling; Li Guofa; Shen Jinsong

    2009-01-01

    In this paper we discuss the edge-preserving regularization method in the reconstruction of physical parameters from geophysical data such as seismic and ground-penetrating radar data.In the regularization method a potential function of model parameters and its corresponding functions are introduced.This method is stable and able to preserve boundaries, and protect resolution.The effect of regularization depends to a great extent on the suitable choice of regularization parameters.The influence of the edge-preserving parameters on the reconstruction results is investigated and the relationship between the regularization parameters and the error of data is described.

  18. HEMATOLOGIC FINDINGS IN OPERATING ROOM STAFFS

    Directory of Open Access Journals (Sweden)

    H SOLTANI

    2000-03-01

    Full Text Available Introduction. Long term exposure to trace amounts of anesthetic vapors and gases may produce hematologic and hepatic disorders in human. Since operating room (OR staffs are exposed to these agents, we decided to study their hematopoietic and hepatic systems in comparison with ordinary ward staffs. Methods. Seventy staffs from OR were compared with a matched similar number of ward staffs about their hematologic and hepatic laboratory findings in a historical cohort study. Findings. Mean of leukocyte and platelet counts were significantly lower in OR staffs, but in normal range. Mean of monocyte count was significantly higher in OR staffs. No significant differences were found between two groups for other hepatic and hematologic tests. Fatigue and headache were reported in OR staffs more than others. Conclusion. These findings may warn a risk to OR staffs but, it is not clear and requires further controlled studies.

  19. Regular Black Holes with Cosmological Constant

    Institute of Scientific and Technical Information of China (English)

    MO Wen-Juan; CAI Rong-Gen; SU Ru-Keng

    2006-01-01

    We present a class of regular black holes with cosmological constant Λ in nonlinear electrodynamics. Instead of usual singularity behind black hole horizon, all fields and curvature invariants are regular everywhere for the regular black holes. Through gauge invariant approach, the linearly dynamical stability of the regular black hole is studied. In odd-parity sector, we find that the Λ term does not appear in the master equations of perturbations, which shows that the regular black hole is stable under odd-parity perturbations. On the other hand, for the even-parity sector, the master equations are more complicated than the case without the cosmological constant. We obtain the sufficient conditions for stability of the regular black hole. We also investigate the thermodynamic properties of the regular black hole, and find that those thermodynamic quantities do not satisfy the differential form of first law of black hole thermodynamics. The reason for violating the first law is revealed.

  20. Regularization of Instantaneous Frequency Attribute Computations

    Science.gov (United States)

    Yedlin, M. J.; Margrave, G. F.; Van Vorst, D. G.; Ben Horin, Y.

    2014-12-01

    We compare two different methods of computation of a temporally local frequency:1) A stabilized instantaneous frequency using the theory of the analytic signal.2) A temporally variant centroid (or dominant) frequency estimated from a time-frequency decomposition.The first method derives from Taner et al (1979) as modified by Fomel (2007) and utilizes the derivative of the instantaneous phase of the analytic signal. The second method computes the power centroid (Cohen, 1995) of the time-frequency spectrum, obtained using either the Gabor or Stockwell Transform. Common to both methods is the necessity of division by a diagonal matrix, which requires appropriate regularization.We modify Fomel's (2007) method by explicitly penalizing the roughness of the estimate. Following Farquharson and Oldenburg (2004), we employ both the L curve and GCV methods to obtain the smoothest model that fits the data in the L2 norm.Using synthetic data, quarry blast, earthquakes and the DPRK tests, our results suggest that the optimal method depends on the data. One of the main applications for this work is the discrimination between blast events and earthquakesFomel, Sergey. " Local seismic attributes." , Geophysics, 72.3 (2007): A29-A33.Cohen, Leon. " Time frequency analysis theory and applications." USA: Prentice Hall, (1995).Farquharson, Colin G., and Douglas W. Oldenburg. "A comparison of automatic techniques for estimating the regularization parameter in non-linear inverse problems." Geophysical Journal International 156.3 (2004): 411-425.Taner, M. Turhan, Fulton Koehler, and R. E. Sheriff. " Complex seismic trace analysis." Geophysics, 44.6 (1979): 1041-1063.

  1. Consistent regularization and renormalization in models with inhomogeneous phases

    CERN Document Server

    Adhikari, Prabal

    2016-01-01

    In many models in condensed matter physics and high-energy physics, one finds inhomogeneous phases at high density and low temperature. These phases are characterized by a spatially dependent condensate or order parameter. A proper calculation requires that one takes the vacuum fluctuations of the model into account. These fluctuations are ultraviolet divergent and must be regularized. We discuss different consistent ways of regularizing and renormalizing quantum fluctuations, focusing on a symmetric energy cutoff scheme and dimensional regularization. We apply these techniques calculating the vacuum energy in the NJL model in 1+1 dimensions in the large-$N_c$ limit and the 3+1 dimensional quark-meson model in the mean-field approximation both for a one-dimensional chiral-density wave.

  2. Consistent regularization and renormalization in models with inhomogeneous phases

    Science.gov (United States)

    Adhikari, Prabal; Andersen, Jens O.

    2017-02-01

    In many models in condensed matter and high-energy physics, one finds inhomogeneous phases at high density and low temperature. These phases are characterized by a spatially dependent condensate or order parameter. A proper calculation requires that one takes the vacuum fluctuations of the model into account. These fluctuations are ultraviolet divergent and must be regularized. We discuss different ways of consistently regularizing and renormalizing quantum fluctuations, focusing on momentum cutoff, symmetric energy cutoff, and dimensional regularization. We apply these techniques calculating the vacuum energy in the Nambu-Jona-Lasinio model in 1 +1 dimensions in the large-Nc limit and in the 3 +1 dimensional quark-meson model in the mean-field approximation both for a one-dimensional chiral-density wave.

  3. Become a staff delegate: why not you?

    CERN Multimedia

    Association du personnel

    2009-01-01

    Following a decision taken at the Staff Association General Assembly in May 2008, staff delegates are elected in the autumn of odd-numbered years. The next elections which will lead to a total renewal of the Staff Council will thus take place in November 2009. Will you be a candidate?

  4. 28 CFR 551.32 - Staff supervision.

    Science.gov (United States)

    2010-07-01

    ... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Staff supervision. 551.32 Section 551.32 Judicial Administration BUREAU OF PRISONS, DEPARTMENT OF JUSTICE INSTITUTIONAL MANAGEMENT MISCELLANEOUS Inmate Organizations § 551.32 Staff supervision. (a) The Warden shall appoint a staff member as...

  5. Strengthening Bullying Prevention through School Staff Connectedness

    Science.gov (United States)

    O'Brennan, Lindsey M.; Waasdorp, Tracy E.; Bradshaw, Catherine P.

    2014-01-01

    The growing concern about bullying and school violence has focused national attention on various aspects of school climate and school connectedness. The current study examined dimensions of staff connectedness (i.e., personal, student, staff, and administration) in relation to staff members' comfort intervening in bullying situations (e.g.,…

  6. Multiscale regularized reconstruction for enhancing microcalcification in digital breast tomosynthesis

    Science.gov (United States)

    Lu, Yao; Chan, Heang-Ping; Wei, Jun; Hadjiiski, Lubomir; Zhou, Chuan

    2012-03-01

    Digital breast tomosynthesis (DBT) holds strong promise for improving the sensitivity of detecting subtle mass lesions. Detection of microcalcifications is more difficult because of high noise and subtle signals in the large DBT volume. It is important to enhance the contrast-to-noise ratio (CNR) of microcalcifications in DBT reconstruction. A major challenge of implementing microcalcification enhancement or noise regularization in DBT reconstruction is to preserve the image quality of masses, especially those with ill-defined margins and subtle spiculations. We are developing a new multiscale regularization (MSR) method for the simultaneous algebraic reconstruction technique (SART) to improve the CNR of microcalcifications without compromising the quality of masses. Each DBT slice is stratified into different frequency bands via wavelet decomposition and the regularization method applies different degrees of regularization to different frequency bands to preserve features of interest and suppress noise. Regularization is constrained by a characteristic map to avoid smoothing subtle microcalcifications. The characteristic map is generated via image feature analysis to identify potential microcalcification locations in the DBT volume. The MSR method was compared to the non-convex total pvariation (TpV) method and SART with no regularization (NR) in terms of the CNR and the full width at half maximum of the line profiles intersecting calcifications and mass spiculations in DBT of human subjects. The results demonstrated that SART regularized by the MSR method was superior to the TpV method for subtle microcalcifications in terms of CNR enhancement. The MSR method preserved the quality of subtle spiculations better than the TpV method in comparison to NR.

  7. Staff views of an opportunistic chlamydia testing pilot in a primary health organisation

    Directory of Open Access Journals (Sweden)

    McKernon S

    2013-12-01

    Full Text Available INTRODUCTION: The Auckland chlamydia pilot was one of three pilots funded by the Ministry of Health to trial implementation of the 2008 Chlamydia Management Guidelines prior to national roll-out. AIM: To assess what elements in the testing programme pilot worked best for staff and to determine how an opportunistic testing programme could be better configured to meet staff needs and preferences. METHODS: A staff survey listed key chlamydia testing tasks in chronological order, and service interventions supporting these tasks. Staff were asked to rate each task on its difficulty prior to the pilot, and then on the difference the pilot had made to each task. They were also asked to rate service interventions on their usefulness during the pilot implementation. RESULTS: The survey had a response rate of 94%. The testing tasks posing the greatest difficulties to staff were those involving patient interactions (41% and management of follow-up (52%. About 70% of staff felt tasks were improved by the pilot. Staff considered the three most useful service interventions to be a chlamydia-specific template created for the practice management system, provision of printed patient resources, and regular team discussions with other staff. DISCUSSION: A significant proportion of staff reported difficulties with routine tasks required for opportunistic testing for chlamydia, highlighting the need to involve staff during programme design. Practice nurse-led approaches to future opportunistic testing programmes should be considered as nurses had a more positive response to the pilot and nurse-led approaches have been shown to be successful overseas.

  8. Ideal regularization for learning kernels from labels.

    Science.gov (United States)

    Pan, Binbin; Lai, Jianhuang; Shen, Lixin

    2014-08-01

    In this paper, we propose a new form of regularization that is able to utilize the label information of a data set for learning kernels. The proposed regularization, referred to as ideal regularization, is a linear function of the kernel matrix to be learned. The ideal regularization allows us to develop efficient algorithms to exploit labels. Three applications of the ideal regularization are considered. Firstly, we use the ideal regularization to incorporate the labels into a standard kernel, making the resulting kernel more appropriate for learning tasks. Next, we employ the ideal regularization to learn a data-dependent kernel matrix from an initial kernel matrix (which contains prior similarity information, geometric structures, and labels of the data). Finally, we incorporate the ideal regularization to some state-of-the-art kernel learning problems. With this regularization, these learning problems can be formulated as simpler ones which permit more efficient solvers. Empirical results show that the ideal regularization exploits the labels effectively and efficiently.

  9. Regularity extraction from non-adjacent sounds

    Directory of Open Access Journals (Sweden)

    Alexandra eBendixen

    2012-05-01

    Full Text Available The regular behavior of sound sources helps us to make sense of the auditory environment. Regular patterns may, for instance, convey information on the identity of a sound source (such as the acoustic signature of a train moving on the rails. Yet typically, this signature overlaps in time with signals emitted from other sound sources. It is generally assumed that auditory regularity extraction cannot operate upon this mixture of signals because it only finds regularities between adjacent sounds. In this view, the auditory environment would be grouped into separate entities by means of readily available acoustic cues such as separation in frequency and location. Regularity extraction processes would then operate upon the resulting groups. Our new experimental evidence challenges this view. We presented two interleaved sound sequences which overlapped in frequency range and shared all acoustic parameters. The sequences only differed in their underlying regular patterns. We inserted deviants into one of the sequences to probe whether the regularity was extracted. In the first experiment, we found that these deviants elicited the mismatch negativity (MMN component. Thus the auditory system was able to find the regularity between the non-adjacent sounds. Regularity extraction was not influenced by sequence cohesiveness as manipulated by the relative duration of tones and silent inter-tone-intervals. In the second experiment, we showed that a regularity connecting non-adjacent sounds was discovered only when the intervening sequence also contained a regular pattern, but not when the intervening sounds were randomly varying. This suggests that separate regular patterns are available to the auditory system as a cue for identifying signals coming from distinct sound sources. Thus auditory regularity extraction is not necessarily confined to a processing stage after initial sound grouping, but may precede grouping when other acoustic cues are unavailable.

  10. Effect of staff attitudes on quality in clinical microbiology services.

    Science.gov (United States)

    Pitt, Sarah J; Sands, Richard L

    2002-01-01

    Technical quality of the work of clinical pathology laboratories is monitored regularly by both internal and external sources. Among the factors that might affect quality, laboratory staff attitudes are rarely considered. In this study, the psychological concepts of 'job satisfaction' and 'climate' are measured among microbiology biomedical scientists in the United Kingdom. A self-report questionnaire was developed and distributed (between November 1998 and February 1999) to biomedical scientists in 161 microbiology laboratories throughout the UK From 2415 questionnaires distributed, 931 replies were received--a response rate of 39%. A separate set of questions covering customer service and participation in internal and external quality assurance schemes was sent to laboratory managers. Biomedical scientists reported lower job satisfaction than did medical technologists in a previous study in the USA. Perception of climate was influenced by several demographic factors, the most important of which being the size of the laboratory. Optimal number of staff in a department was found to be less than 30. Aggregation of climate scores from members of the same department showed that a positive laboratory climate was important for good performance in internal and external measures of technical quality. For the best service, laboratory climate must be supported by a staff perception that the department is committed to enhancing quality--a climate for laboratory quality.

  11. STAFFS MOTIVATIONAL IN KNOWLEDGE TRANSFER BEHAVIOUR

    Directory of Open Access Journals (Sweden)

    Saide

    2016-06-01

    Full Text Available Previous have highlighted knowledge transfer behaviour (KTB for an increase organization performance, however an obstacle from the perspective among staffs still exists. The problem is still difficult because staffs will not share their knowledge as they thinking their knowledge is important. This paper investigated factors of staffs motivational that influence KTB among staffs in Riau Province of Indonesia. The survey 400 respondents were used, 325 were returned, and 75 were not returned. Likert and smart PLS to confirmation the conceptual model. This paper conclude factors that reward, trust, and an enjoyment helping colleagues of staffs motivation are factors which influencing the KTB. The results and conclusions are discussed.

  12. Turnover: strategies for staff retention.

    Science.gov (United States)

    SnowAntle, S

    1990-01-01

    This discussion has focused on a number of areas where organizations may find opportunities for more effectively managing employee retention. Given the multitude of causes and consequences, there is no one quick fix. Effective management of employee retention requires assessment of the entire human resources process, that is, recruitment, selection, job design, compensation, supervision, work conditions, etc. Regular and systematic diagnosis of turnover and implementation of multiple strategies and evaluation are needed (Mobley, 1982).

  13. A Block-Based Regularized Approach for Image Interpolation

    Directory of Open Access Journals (Sweden)

    Li Chen

    2014-01-01

    Full Text Available This paper presents a new efficient algorithm for image interpolation based on regularization theory. To render a high-resolution (HR image from a low-resolution (LR image, classical interpolation techniques estimate the missing pixels from the surrounding pixels based on a pixel-by-pixel basis. In contrast, the proposed approach formulates the interpolation problem into the optimization of a cost function. The proposed cost function consists of a data fidelity term and regularization functional. The closed-form solution to the optimization problem is derived using the framework of constrained least squares minimization, by incorporating Kronecker product and singular value decomposition (SVD to reduce the computational cost of the algorithm. The effect of regularization on the interpolation results is analyzed, and an adaptive strategy is proposed for selecting the regularization parameter. Experimental results show that the proposed approach is able to reconstruct high-fidelity HR images, while suppressing artifacts such as edge distortion and blurring, to produce superior interpolation results to that of conventional image interpolation techniques.

  14. Spectral Regularization Algorithms for Learning Large Incomplete Matrices.

    Science.gov (United States)

    Mazumder, Rahul; Hastie, Trevor; Tibshirani, Robert

    2010-03-01

    We use convex relaxation techniques to provide a sequence of regularized low-rank solutions for large-scale matrix completion problems. Using the nuclear norm as a regularizer, we provide a simple and very efficient convex algorithm for minimizing the reconstruction error subject to a bound on the nuclear norm. Our algorithm Soft-Impute iteratively replaces the missing elements with those obtained from a soft-thresholded SVD. With warm starts this allows us to efficiently compute an entire regularization path of solutions on a grid of values of the regularization parameter. The computationally intensive part of our algorithm is in computing a low-rank SVD of a dense matrix. Exploiting the problem structure, we show that the task can be performed with a complexity linear in the matrix dimensions. Our semidefinite-programming algorithm is readily scalable to large matrices: for example it can obtain a rank-80 approximation of a 10(6) × 10(6) incomplete matrix with 10(5) observed entries in 2.5 hours, and can fit a rank 40 approximation to the full Netflix training set in 6.6 hours. Our methods show very good performance both in training and test error when compared to other competitive state-of-the art techniques.

  15. Regularized Laplacian Estimation and Fast Eigenvector Approximation

    CERN Document Server

    Perry, Patrick O

    2011-01-01

    Recently, Mahoney and Orecchia demonstrated that popular diffusion-based procedures to compute a quick \\emph{approximation} to the first nontrivial eigenvector of a data graph Laplacian \\emph{exactly} solve certain regularized Semi-Definite Programs (SDPs). In this paper, we extend that result by providing a statistical interpretation of their approximation procedure. Our interpretation will be analogous to the manner in which $\\ell_2$-regularized or $\\ell_1$-regularized $\\ell_2$-regression (often called Ridge regression and Lasso regression, respectively) can be interpreted in terms of a Gaussian prior or a Laplace prior, respectively, on the coefficient vector of the regression problem. Our framework will imply that the solutions to the Mahoney-Orecchia regularized SDP can be interpreted as regularized estimates of the pseudoinverse of the graph Laplacian. Conversely, it will imply that the solution to this regularized estimation problem can be computed very quickly by running, e.g., the fast diffusion-base...

  16. Hidden Regular Variation: Detection and Estimation

    CERN Document Server

    Mitra, Abhimanyu

    2010-01-01

    Hidden regular variation defines a subfamily of distributions satisfying multivariate regular variation on $\\mathbb{E} = [0, \\infty]^d \\backslash \\{(0,0, ..., 0) \\} $ and models another regular variation on the sub-cone $\\mathbb{E}^{(2)} = \\mathbb{E} \\backslash \\cup_{i=1}^d \\mathbb{L}_i$, where $\\mathbb{L}_i$ is the $i$-th axis. We extend the concept of hidden regular variation to sub-cones of $\\mathbb{E}^{(2)}$ as well. We suggest a procedure of detecting the presence of hidden regular variation, and if it exists, propose a method of estimating the limit measure exploiting its semi-parametric structure. We exhibit examples where hidden regular variation yields better estimates of probabilities of risk sets.

  17. A multiplicative regularization for force reconstruction

    Science.gov (United States)

    Aucejo, M.; De Smet, O.

    2017-02-01

    Additive regularizations, such as Tikhonov-like approaches, are certainly the most popular methods for reconstructing forces acting on a structure. These approaches require, however, the knowledge of a regularization parameter, that can be numerically computed using specific procedures. Unfortunately, these procedures are generally computationally intensive. For this particular reason, it could be of primary interest to propose a method able to proceed without defining any regularization parameter beforehand. In this paper, a multiplicative regularization is introduced for this purpose. By construction, the regularized solution has to be calculated in an iterative manner. In doing so, the amount of regularization is automatically adjusted throughout the resolution process. Validations using synthetic and experimental data highlight the ability of the proposed approach in providing consistent reconstructions.

  18. Regular Disjunction-Free Default Theories

    Institute of Scientific and Technical Information of China (English)

    Xi-ShunZhao

    2004-01-01

    In this paper, the class of regular disjunction-free default theories is introduced and investigated. A transformation from regular default theories to normal default theories is established. The initial theory and the transformed theory have the same extensions when restricted to old variables. Hence, regular default theories enjoy some similar properties (e.g., existence of extensions, semi-monotonicity) as normal default theories. Then, a new algorithm for credulous reasoning of regular theories is developed. This algorithm runs in a time not more than O(1.45n), where n is the number of defaults. In case of regular prerequisite-free or semi-2CNF default theories, the credulous reasoning can be solved in polynomial time. However, credulous reasoning for semi-Horn default theories is shown to be NP-complete although it is tractable for Horn default theories. Moreover, skeptical reasoning for regular unary default theories is co-NP-complete.

  19. Regular Disjunction-Free Default Theories

    Institute of Scientific and Technical Information of China (English)

    Xi-Shun Zhao

    2004-01-01

    In this paper, the class of regular disjunction-free default theories is introduced and investigated.A transformation from regular default theories to normal default theories is established. The initial theory and the transformed theory have the same extensions when restricted to old variables. Hence, regular default theories enjoy some similar properties (e.g., existence of extensions, semi-monotonicity) as normal default theories. Then,a new algorithm for credulous reasoning of regular theories is developed. This algorithm runs in a time not more than O(1.45n), where n is the number of defaults. In case of regular prerequisite-free or semi-2CNF default theories, the credulous reasoning can be solved in polynomial time. However, credulous reasoning for semi-Horn default theories is shown to be NP-complete although it is tractable for Horn default theories. Moreover, skeptical reasoning for regular unary default theories is co-NP-complete.

  20. Regularity effect in prospective memory during aging

    Directory of Open Access Journals (Sweden)

    Geoffrey Blondelle

    2016-10-01

    Full Text Available Background: Regularity effect can affect performance in prospective memory (PM, but little is known on the cognitive processes linked to this effect. Moreover, its impacts with regard to aging remain unknown. To our knowledge, this study is the first to examine regularity effect in PM in a lifespan perspective, with a sample of young, intermediate, and older adults. Objective and design: Our study examined the regularity effect in PM in three groups of participants: 28 young adults (18–30, 16 intermediate adults (40–55, and 25 older adults (65–80. The task, adapted from the Virtual Week, was designed to manipulate the regularity of the various activities of daily life that were to be recalled (regular repeated activities vs. irregular non-repeated activities. We examine the role of several cognitive functions including certain dimensions of executive functions (planning, inhibition, shifting, and binding, short-term memory, and retrospective episodic memory to identify those involved in PM, according to regularity and age. Results: A mixed-design ANOVA showed a main effect of task regularity and an interaction between age and regularity: an age-related difference in PM performances was found for irregular activities (older < young, but not for regular activities. All participants recalled more regular activities than irregular ones with no age effect. It appeared that recalling of regular activities only involved planning for both intermediate and older adults, while recalling of irregular ones were linked to planning, inhibition, short-term memory, binding, and retrospective episodic memory. Conclusion: Taken together, our data suggest that planning capacities seem to play a major role in remembering to perform intended actions with advancing age. Furthermore, the age-PM-paradox may be attenuated when the experimental design is adapted by implementing a familiar context through the use of activities of daily living. The clinical

  1. Ambiguities in Pauli-Villars regularization

    CERN Document Server

    Kleiss, Ronald H P

    2014-01-01

    We investigate regularization of scalar one-loop integrals in the Pauli- Villars subtraction scheme. The results depend on the number of sub- tractions, in particular the finite terms that survive after the diver- gences have been absorbed by renormalization. Therefore the process of Pauli-Villars regularization is ambiguous. We discuss how these am- biguities may be resolved by applying an asymptotically large number of subtractions, which results in a regularization that is automatically valid in any number of dimensions.

  2. Regularized brain reading with shrinkage and smoothing

    OpenAIRE

    Wehbe, Leila; Ramdas, Aaditya; Steorts, Rebecca C.; Shalizi, Cosma Rohilla

    2014-01-01

    Functional neuroimaging measures how the brain responds to complex stimuli. However, sample sizes are modest, noise is substantial, and stimuli are high dimensional. Hence, direct estimates are inherently imprecise and call for regularization. We compare a suite of approaches which regularize via shrinkage: ridge regression, the elastic net (a generalization of ridge regression and the lasso), and a hierarchical Bayesian model based on small area estimation (SAE). We contrast regularization w...

  3. Branch Processes of Regular Magnetic Monopole

    Institute of Scientific and Technical Information of China (English)

    MO Shu-Fan; REN Ji-Rong; ZHU Tao

    2009-01-01

    In this paper, by making use of Duan's topological current theory, the branch process of regular magnetic monopoles is discussed in detail Regular magnetic monopoles are found generating or annihilating at the limit point and encountering, splitting, or merging at the bifurcation point and the degenerate point systematically of the vector order parameter field φ(x).Furthermore, it is also shown that when regular magnetic monopoles split or merge at the degenerate point of field function φ, the total topological charges of the regular magnetic monopoles axe still unchanged.

  4. Iterative Regularization with Minimum-Residual Methods

    DEFF Research Database (Denmark)

    Jensen, Toke Koldborg; Hansen, Per Christian

    2007-01-01

    We study the regularization properties of iterative minimum-residual methods applied to discrete ill-posed problems. In these methods, the projection onto the underlying Krylov subspace acts as a regularizer, and the emphasis of this work is on the role played by the basis vectors of these Krylov...... subspaces. We provide a combination of theory and numerical examples, and our analysis confirms the experience that MINRES and MR-II can work as general regularization methods. We also demonstrate theoretically and experimentally that the same is not true, in general, for GMRES and RRGMRES their success...... as regularization methods is highly problem dependent....

  5. Iterative regularization with minimum-residual methods

    DEFF Research Database (Denmark)

    Jensen, Toke Koldborg; Hansen, Per Christian

    2006-01-01

    We study the regularization properties of iterative minimum-residual methods applied to discrete ill-posed problems. In these methods, the projection onto the underlying Krylov subspace acts as a regularizer, and the emphasis of this work is on the role played by the basis vectors of these Krylov...... subspaces. We provide a combination of theory and numerical examples, and our analysis confirms the experience that MINRES and MR-II can work as general regularization methods. We also demonstrate theoretically and experimentally that the same is not true, in general, for GMRES and RRGMRES - their success...... as regularization methods is highly problem dependent....

  6. Ideal-comparability over Regular Rings

    Institute of Scientific and Technical Information of China (English)

    Huan Yin CHEN; Miao Sen CHEN

    2006-01-01

    We introduce the concept of ideal-comparability condition for regular rings. Let I be an ideal of a regular ring R. If R satisfies the Ⅰ-comparability condition, then R is one-sided unit-regular if and only if so is R/I. Also, we show that a regular ring R satisfies the general comparability if and only if the following hold: (1) R/I satisfies the general comparability; (2) R satisfies the general Ⅰ-comparability condition; (3) The natural map B(R) → B(R/I) is surjective.

  7. Local and Nonlocal Regularization to Image Interpolation

    Directory of Open Access Journals (Sweden)

    Yi Zhan

    2014-01-01

    Full Text Available This paper presents an image interpolation model with local and nonlocal regularization. A nonlocal bounded variation (BV regularizer is formulated by an exponential function including gradient. It acts as the Perona-Malik equation. Thus our nonlocal BV regularizer possesses the properties of the anisotropic diffusion equation and nonlocal functional. The local total variation (TV regularizer dissipates image energy along the orthogonal direction to the gradient to avoid blurring image edges. The derived model efficiently reconstructs the real image, leading to a natural interpolation which reduces blurring and staircase artifacts. We present experimental results that prove the potential and efficacy of the method.

  8. Regularization and error assignment to unfolded distributions

    CERN Document Server

    Zech, Gunter

    2011-01-01

    The commonly used approach to present unfolded data only in graphical formwith the diagonal error depending on the regularization strength is unsatisfac-tory. It does not permit the adjustment of parameters of theories, the exclusionof theories that are admitted by the observed data and does not allow the com-bination of data from different experiments. We propose fixing the regulariza-tion strength by a p-value criterion, indicating the experimental uncertaintiesindependent of the regularization and publishing the unfolded data in additionwithout regularization. These considerations are illustrated with three differentunfolding and smoothing approaches applied to a toy example.

  9. Bit-coded regular expression parsing

    DEFF Research Database (Denmark)

    Nielsen, Lasse; Henglein, Fritz

    2011-01-01

    Regular expression parsing is the problem of producing a parse tree of a string for a given regular expression. We show that a compact bit representation of a parse tree can be produced efficiently, in time linear in the product of input string size and regular expression size, by simplifying...... the DFA-based parsing algorithm due to Dub ´e and Feeley to emit the bits of the bit representation without explicitly materializing the parse tree itself. We furthermore show that Frisch and Cardelli’s greedy regular expression parsing algorithm can be straightforwardly modified to produce bit codings...

  10. The regularity of quotient paratopological groups

    CERN Document Server

    Banakh, Taras

    2010-01-01

    Let $H$ be a closed subgroup of a regular abelian paratopological group $G$. The group reflexion $G^\\flat$ of $G$ is the group $G$ endowed with the strongest group topology, weaker that the original topology of $G$. We show that the quotient $G/H$ is Hausdorff (and regular) if $H$ is closed (and locally compact) in $G^\\flat$. On the other hand, we construct an example of a regular abelian paratopological group $G$ containing a closed discrete subgroup $H$ such that the quotient $G/H$ is Hausdorff but not regular.

  11. 2013 Elections to Staff Council

    CERN Multimedia

    Staff Association

    2013-01-01

    Elections Timetable Starting with Echo of 16 September, posters, etc. call for applications Monday 21 October, at noon closing date for receipt of the applications Monday 28 October, at noon start date for voting Monday 11 November, at noon closing date for voting Monday 18 and Monday 25 November, publication of the results in Echo Tuesday 19 November Staff Association Assizes Tuesday 3 December, at 10.00 a.m. first meeting of the new Staff Council and election of the new Executive Committee The voting procedure is monitored by the Election Committee, which is also in charge of announcing the results in Echo on 18 and 25 November. n its meeting on 11 September 2013, the Electoral Commission decided on the following distribution of seats in colleges O.1 to O.6: Sectors Departments Career paths AA – A – B – C – D Career paths E – F – G – H Accelerators and Technology BE TE EN Electoral college 0.1 13 si&...

  12. 2011 Elections to Staff Council

    CERN Multimedia

    Association du personnel

    2011-01-01

    Elections Timetable Starting with Echo of 26 September, posters, etc. call for applications Wednesday 26 October, at noon closing date for receipt of the application Monday 31 October, at noon start date for voting Monday 14 November, at noon closing date for voting Monday 21 November, publication of the results in Echo Tuesday 22 and Wednesday 29 November Staff Association Assizes Tuesday 6 December, at 10.00 a.m. first meeting of the new Staff Council and election of the new Executive Committee The voting procedure will be monitored by the Election Committee, which is also in charge of announcing the results in Echo on 21 November. In its meeting on 19 September 2011, the Electoral Commission decided on the following distribution of seats in colleges 0.1 to 0.6: Sector Department Career path AA – A – B – C – D Career path E – F – G – H Accelerators and Technology BE TE EN Electoral college 0.1 18 si&e...

  13. 2013 Elections to Staff Council

    CERN Multimedia

    Staff Association

    2013-01-01

    Elections Timetable Starting with Echo of 16 September, posters, etc. call for applications Monday 21 October, at noon closing date for receipt of the applications Monday 28 October, at noon start date for voting Monday 11 November, at noon closing date for voting Monday 18 and Monday 25 November, publication of the results in Echo Tuesday 19 November Staff Association Assizes Tuesday 3 December, at 10.00 a.m. first meeting of the new Staff Council and election of the new Executive Committee The voting procedure is monitored by the Election Committee, which is also in charge of announcing the results in Echo on 18 and 25 November. n its meeting on 11 September 2013, the Electoral Commission decided on the following distribution of seats in colleges O.1 to O.6: Sectors Departments Career paths AA – A – B – C – D Career paths E – F – G – H Accelerators and Technology BE TE EN Electoral colle...

  14. 2011 Elections to Staff Council

    CERN Multimedia

    Staff Association

    2011-01-01

    Elections Timetable Starting with Echo of 26 September, posters, etc. call for applications Wednesday 26 October, at noon closing date for receipt of the application Monday 31 October, at noon start date for voting Monday 14 November, at noon closing date for voting Monday 21 November, publication of the results in Echo Tuesday 22 and Wednesday 29 November Staff Association Assizes Tuesday 6 December, at 10.00 a.m. first meeting of the new Staff Council and election of the new Executive Committee The voting procedure will be monitored by the Election Committee, which is also in charge of announcing the results in Echo on 21 November. In its meeting on 19 September 2011, the Electoral Commission decided on the following distribution of seats in colleges 0.1 to 0.6: Sector Department Career path AA – A – B – C – D Career path E – F – G – H Accelerators and Technology BE TE EN Electoral college 0.1 18 si&e...

  15. A regularization method for extrapolation of solar potential magnetic fields

    Science.gov (United States)

    Gary, G. A.; Musielak, Z. E.

    1992-01-01

    The mathematical basis of a Tikhonov regularization method for extrapolating the chromospheric-coronal magnetic field using photospheric vector magnetograms is discussed. The basic techniques show that the Cauchy initial value problem can be formulated for potential magnetic fields. The potential field analysis considers a set of linear, elliptic partial differential equations. It is found that, by introducing an appropriate smoothing of the initial data of the Cauchy potential problem, an approximate Fourier integral solution is found, and an upper bound to the error in the solution is derived. This specific regularization technique, which is a function of magnetograph measurement sensitivities, provides a method to extrapolate the potential magnetic field above an active region into the chromosphere and low corona.

  16. Sparsity-regularized HMAX for visual recognition.

    Directory of Open Access Journals (Sweden)

    Xiaolin Hu

    Full Text Available About ten years ago, HMAX was proposed as a simple and biologically feasible model for object recognition, based on how the visual cortex processes information. However, the model does not encompass sparse firing, which is a hallmark of neurons at all stages of the visual pathway. The current paper presents an improved model, called sparse HMAX, which integrates sparse firing. This model is able to learn higher-level features of objects on unlabeled training images. Unlike most other deep learning models that explicitly address global structure of images in every layer, sparse HMAX addresses local to global structure gradually along the hierarchy by applying patch-based learning to the output of the previous layer. As a consequence, the learning method can be standard sparse coding (SSC or independent component analysis (ICA, two techniques deeply rooted in neuroscience. What makes SSC and ICA applicable at higher levels is the introduction of linear higher-order statistical regularities by max pooling. After training, high-level units display sparse, invariant selectivity for particular individuals or for image categories like those observed in human inferior temporal cortex (ITC and medial temporal lobe (MTL. Finally, on an image classification benchmark, sparse HMAX outperforms the original HMAX by a large margin, suggesting its great potential for computer vision.

  17. Iterated Process Analysis over Lattice-Valued Regular Expressions

    DEFF Research Database (Denmark)

    Midtgaard, Jan; Nielson, Flemming; Nielson, Hanne Riis

    2016-01-01

    We present an iterated approach to statically analyze programs of two processes communicating by message passing. Our analysis operates over a domain of lattice-valued regular expressions, and computes increasingly better approximations of each process's communication behavior. Overall the work...... extends traditional semantics-based program analysis techniques to automatically reason about message passing in a manner that can simultaneously analyze both values of variables as well as message order, message content, and their interdependencies....

  18. Gevrey Regularity for the Noncutoff Nonlinear Homogeneous Boltzmann Equation with Strong Singularity

    Directory of Open Access Journals (Sweden)

    Shi-you Lin

    2014-01-01

    Full Text Available The Cauchy problem of the nonlinear spatially homogeneous Boltzmann equation without angular cutoff is studied. By using analytic techniques, one proves the Gevrey regularity of the C∞ solutions in non-Maxwellian and strong singularity cases.

  19. Continuum regularization of quantum field theory

    Energy Technology Data Exchange (ETDEWEB)

    Bern, Z.

    1986-04-01

    Possible nonperturbative continuum regularization schemes for quantum field theory are discussed which are based upon the Langevin equation of Parisi and Wu. Breit, Gupta and Zaks made the first proposal for new gauge invariant nonperturbative regularization. The scheme is based on smearing in the ''fifth-time'' of the Langevin equation. An analysis of their stochastic regularization scheme for the case of scalar electrodynamics with the standard covariant gauge fixing is given. Their scheme is shown to preserve the masslessness of the photon and the tensor structure of the photon vacuum polarization at the one-loop level. Although stochastic regularization is viable in one-loop electrodynamics, two difficulties arise which, in general, ruins the scheme. One problem is that the superficial quadratic divergences force a bottomless action for the noise. Another difficulty is that stochastic regularization by fifth-time smearing is incompatible with Zwanziger's gauge fixing, which is the only known nonperturbaive covariant gauge fixing for nonabelian gauge theories. Finally, a successful covariant derivative scheme is discussed which avoids the difficulties encountered with the earlier stochastic regularization by fifth-time smearing. For QCD the regularized formulation is manifestly Lorentz invariant, gauge invariant, ghost free and finite to all orders. A vanishing gluon mass is explicitly verified at one loop. The method is designed to respect relevant symmetries, and is expected to provide suitable regularization for any theory of interest. Hopefully, the scheme will lend itself to nonperturbative analysis. 44 refs., 16 figs.

  20. Regular Decompositions for H(div) Spaces

    Energy Technology Data Exchange (ETDEWEB)

    Kolev, Tzanio [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Center for Applied Scientific Computing; Vassilevski, Panayot [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Center for Applied Scientific Computing

    2012-01-01

    We study regular decompositions for H(div) spaces. In particular, we show that such regular decompositions are closely related to a previously studied “inf-sup” condition for parameter-dependent Stokes problems, for which we provide an alternative, more direct, proof.

  1. Adaptive regularization of noisy linear inverse problems

    DEFF Research Database (Denmark)

    Hansen, Lars Kai; Madsen, Kristoffer Hougaard; Lehn-Schiøler, Tue

    2006-01-01

    In the Bayesian modeling framework there is a close relation between regularization and the prior distribution over parameters. For prior distributions in the exponential family, we show that the optimal hyper-parameter, i.e., the optimal strength of regularization, satisfies a simple relation: T...

  2. 12 CFR 725.3 - Regular membership.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 6 2010-01-01 2010-01-01 false Regular membership. 725.3 Section 725.3 Banks and Banking NATIONAL CREDIT UNION ADMINISTRATION REGULATIONS AFFECTING CREDIT UNIONS NATIONAL CREDIT UNION ADMINISTRATION CENTRAL LIQUIDITY FACILITY § 725.3 Regular membership. (a) A natural person...

  3. Fast and compact regular expression matching

    DEFF Research Database (Denmark)

    Bille, Philip; Farach-Colton, Martin

    2008-01-01

    We study 4 problems in string matching, namely, regular expression matching, approximate regular expression matching, string edit distance, and subsequence indexing, on a standard word RAM model of computation that allows logarithmic-sized words to be manipulated in constant time. We show how...

  4. Regularity of harmonic maps with the potential

    Institute of Scientific and Technical Information of China (English)

    CHU; Yuming

    2006-01-01

    The aim of this work is to prove the partial regularity of the harmonic maps with potential. The main difficulty caused by the potential is how to find the equation satisfied by the scaling function. Under the assumption on the potential we can obtain the equation, however, for a general potential, even if it is smooth, the partial regularity is still open.

  5. On the Equivalence of Regularization Schemes

    Institute of Scientific and Technical Information of China (English)

    YANG Ji-Feng

    2002-01-01

    We illustrate via the sunset diagram that dimensional regularization ‘deforms' the nonlocal contentsof multi-loop diagrams with its equivalence to cutoff regularization scheme recovered only after sub-divergence wassubtracted. Then we employed a differential equation approach for calculating loop diagrams to verify that dimensionalare argued especially in nonperturbativc perspective.

  6. Regular Event Structures and Finite Petri Nets

    DEFF Research Database (Denmark)

    Nielsen, M.; Thiagarajan, P.S.

    2002-01-01

    We present the notion of regular event structures and conjecture that they correspond exactly to finite 1-safe Petri nets. We show that the conjecture holds for the conflict-free case. Even in this restricted setting, the proof is non-trivial and involves a natural subclass of regular event...

  7. Regularity Re-Revisited: Modality Matters

    Science.gov (United States)

    Tsapkini, Kyrana; Jarema, Gonia; Kehayia, Eva

    2004-01-01

    The issue of regular-irregular past tense formation was examined in a cross-modal lexical decision task in Modern Greek, a language where the orthographic and phonological overlap between present and past tense stems is the same for both regular and irregular verbs. The experiment described here is a follow-up study of previous visual lexical…

  8. Regularization algorithms based on total least squares

    DEFF Research Database (Denmark)

    Hansen, Per Christian; O'Leary, Dianne P.

    1996-01-01

    Discretizations of inverse problems lead to systems of linear equations with a highly ill-conditioned coefficient matrix, and in order to compute stable solutions to these systems it is necessary to apply regularization methods. Classical regularization methods, such as Tikhonov's method or trunc...

  9. A regularized stationary mean-field game

    KAUST Repository

    Yang, Xianjin

    2016-04-19

    In the thesis, we discuss the existence and numerical approximations of solutions of a regularized mean-field game with a low-order regularization. In the first part, we prove a priori estimates and use the continuation method to obtain the existence of a solution with a positive density. Finally, we introduce the monotone flow method and solve the system numerically.

  10. STAFF PERFORMANCE CONTROL AND SECURITY OF CORPORATE INFORMATION RESOURCES

    Directory of Open Access Journals (Sweden)

    Elena Alexandrovna MAXIMOVA

    2014-01-01

    Full Text Available The paper considered the study of corporate manpower’ operation and information security for corporate data resources that evidenced necessity of controlling opera-tion of employees for both productive work performance and the secured corporate database as well. The study suggested the monitoring of work performance’ efficien-cy in the staff done with a specific technique, with a symbolic model drafted for soft wiring.

  11. Planning Staff and Space Capacity Requirements during Wartime.

    Science.gov (United States)

    Kepner, Elisa B; Spencer, Rachel

    2016-01-01

    Determining staff and space requirements for military medical centers can be challenging. Changing patient populations change the caseload requirements. Deployment and assignment rotations change the experience and education of clinicians and support staff, thereby changing the caseload capacity of a facility. During wartime, planning becomes increasingly more complex. What will the patient mix and caseload volume be by location? What type of clinicians will be available and when? How many beds are needed at each facility to meet caseload demand and match clinician supply? As soon as these factors are known, operations are likely to change and planning factors quickly become inaccurate. Soon, more beds or staff are needed in certain locations to meet caseload demand while other locations retain underutilized staff, waiting for additional caseload fluctuations. This type of complexity challenges the best commanders. As in so many other industries, supply and demand principles apply to military health, but very little is stable about military health capacity planning. Planning analysts build complex statistical forecasting models to predict caseload based on historical patterns. These capacity planning techniques work best in stable repeatable processes where caseload and staffing resources remain constant over a long period of time. Variability must be simplified to predict complex operations. This is counterintuitive to the majority of capacity planners who believe more data drives better answers. When the best predictor of future needs is not historical patterns, traditional capacity planning does not work. Rather, simplified estimation techniques coupled with frequent calibration adjustments to account for environmental changes will create the most accurate and most useful capacity planning and management system. The method presented in this article outlines the capacity planning approach used to actively manage hospital staff and space during Operations Iraqi

  12. Research staff and public engagement

    DEFF Research Database (Denmark)

    Davies, Sarah Rachael

    2013-01-01

    Public engagement plays an important role in the contemporary UK academy, and is promoted through initiatives such as Beacons of Public Engagement and research grant 'Pathways to Impact'. Relatively little is known, however, about academic experiences of such engagement activities. This study...... focuses on one staff group, contract researchers, to explore the perceived challenges and opportunities of public engagement. Qualitative and quantitative data-from a web-based survey and three focus groups-are used to show that, while engagement activities are often seen as rewarding, the challenges...... involved in participating in them are profound. While researchers report practical needs, such as for logistical support or communication training, key barriers relate to the conditions of contract research more generally, and specifically to job insecurity, transiency, and lack of autonomy. © 2013...

  13. Minimal regular 2-graphs and applications

    Institute of Scientific and Technical Information of China (English)

    FAN; Hongbing; LIU; Guizhen; LIU; Jiping

    2006-01-01

    A 2-graph is a hypergraph with edge sizes of at most two. A regular 2-graph is said to be minimal if it does not contain a proper regular factor. Let f2(n) be the maximum value of degrees over all minimal regular 2-graphs of n vertices. In this paper, we provide a structure property of minimal regular 2-graphs, and consequently, prove that f2(n) = n+3-i/3where 1 ≤i≤6, i=n (mod 6) andn≥ 7, which solves a conjecture posed by Fan, Liu, Wu and Wong. As applications in graph theory, we are able to characterize unfactorable regular graphs and provide the best possible factor existence theorem on degree conditions. Moreover, f2(n) and the minimal 2-graphs can be used in the universal switch box designs, which originally motivated this study.

  14. A linear functional strategy for regularized ranking.

    Science.gov (United States)

    Kriukova, Galyna; Panasiuk, Oleksandra; Pereverzyev, Sergei V; Tkachenko, Pavlo

    2016-01-01

    Regularization schemes are frequently used for performing ranking tasks. This topic has been intensively studied in recent years. However, to be effective a regularization scheme should be equipped with a suitable strategy for choosing a regularization parameter. In the present study we discuss an approach, which is based on the idea of a linear combination of regularized rankers corresponding to different values of the regularization parameter. The coefficients of the linear combination are estimated by means of the so-called linear functional strategy. We provide a theoretical justification of the proposed approach and illustrate them by numerical experiments. Some of them are related with ranking the risk of nocturnal hypoglycemia of diabetes patients.

  15. On regularizations of the Dirac delta distribution

    Science.gov (United States)

    Hosseini, Bamdad; Nigam, Nilima; Stockie, John M.

    2016-01-01

    In this article we consider regularizations of the Dirac delta distribution with applications to prototypical elliptic and hyperbolic partial differential equations (PDEs). We study the convergence of a sequence of distributions SH to a singular term S as a parameter H (associated with the support size of SH) shrinks to zero. We characterize this convergence in both the weak-* topology of distributions and a weighted Sobolev norm. These notions motivate a framework for constructing regularizations of the delta distribution that includes a large class of existing methods in the literature. This framework allows different regularizations to be compared. The convergence of solutions of PDEs with these regularized source terms is then studied in various topologies such as pointwise convergence on a deleted neighborhood and weighted Sobolev norms. We also examine the lack of symmetry in tensor product regularizations and effects of dissipative error in hyperbolic problems.

  16. The operational staff during exercise RESUME-95

    Energy Technology Data Exchange (ETDEWEB)

    Jensen, J. [Jensen Consult, Virum (Denmark)

    1997-12-31

    With more than 100 participants entering the exercise RESUME-95 the Exercise Planning Committee decided to establish an operational staff named Directing Staff (DISTAFF) to ensure that the exercise plan was followed, the planned activities were carried out and to intervene if anything went wrong. In general the duties of the operational staff involve tasks such as secretarial assistance, keeping log of the progress of the situation and gathering, updating and distributing information on all aspects of the situation. Throughout the entire event it is the staff`s responsibility to keep a general view of the current situation and to make the necessary plans for the progress of the situation based on the available information. Furthermore the staff should ensure necessary contact to the public and to the media. (au).

  17. Regularized Image Reconstruction for Ultrasound Attenuation Transmission Tomography

    Directory of Open Access Journals (Sweden)

    I. Peterlik

    2008-06-01

    Full Text Available The paper is focused on ultrasonic transmission tomography as a potential medical imaging modality, namely for breast cancer diagnosis. Ultrasound attenuation coefficient is one of the tissue parameters which are related to the pathological tissue state. A technique to reconstruct images of attenuation distribution is presented. Furthermore, an alternative to the commonly used filtered backprojection or algebraic reconstruction techniques is proposed. It is based on regularization of the image reconstruction problem which imposes smoothness in the resulting images while preserving edges. The approach is analyzed on synthetic data sets. The results show that it stabilizes the image restoration by compensating for main sources of estimation errors in this imaging modality.

  18. Improving staff retention and career progression.

    Science.gov (United States)

    Szeremeta, Lorraine; Shamash, Natalie

    Staff shortages are serious and widespread and, for many trusts, the cost of temporary staff is not sustainable. In many cases, the existing workforce has the skills necessary to fill vacant posts. A trust developed an initiative to maximise use of its nurses' expertise and minimise staff attrition. This article describes the scheme and how it increased job satisfaction, promoted development opportunities and cut costs.

  19. Managing reliance on temporary agency staff.

    Science.gov (United States)

    Nicholson, Maria

    2016-03-01

    Amid spiralling agency staff costs, in November 2015 Monitor and the Trust Development Authority placed caps on the hourly rate that NHS trusts can pay agency staff, and informed all NHS and foundation trusts that they are required to procure agency staff through approved frameworks. This article suggests ways in which management can maintain these requirements while ensuring safe staffing levels and high-quality care delivery.

  20. Low-Complexity Regularization Algorithms for Image Deblurring

    KAUST Repository

    Alanazi, Abdulrahman

    2016-11-01

    Image restoration problems deal with images in which information has been degraded by blur or noise. In practice, the blur is usually caused by atmospheric turbulence, motion, camera shake, and several other mechanical or physical processes. In this study, we present two regularization algorithms for the image deblurring problem. We first present a new method based on solving a regularized least-squares (RLS) problem. This method is proposed to find a near-optimal value of the regularization parameter in the RLS problems. Experimental results on the non-blind image deblurring problem are presented. In all experiments, comparisons are made with three benchmark methods. The results demonstrate that the proposed method clearly outperforms the other methods in terms of both the output PSNR and structural similarity, as well as the visual quality of the deblurred images. To reduce the complexity of the proposed algorithm, we propose a technique based on the bootstrap method to estimate the regularization parameter in low and high-resolution images. Numerical results show that the proposed technique can effectively reduce the computational complexity of the proposed algorithms. In addition, for some cases where the point spread function (PSF) is separable, we propose using a Kronecker product so as to reduce the computations. Furthermore, in the case where the image is smooth, it is always desirable to replace the regularization term in the RLS problems by a total variation term. Therefore, we propose a novel method for adaptively selecting the regularization parameter in a so-called square root regularized total variation (SRTV). Experimental results demonstrate that our proposed method outperforms the other benchmark methods when applied to smooth images in terms of PSNR, SSIM and the restored image quality. In this thesis, we focus on the non-blind image deblurring problem, where the blur kernel is assumed to be known. However, we developed algorithms that also work

  1. Quantitative regularities in floodplain formation

    Science.gov (United States)

    Nevidimova, O.

    2009-04-01

    Quantitative regularities in floodplain formation Modern methods of the theory of complex systems allow to build mathematical models of complex systems where self-organizing processes are largely determined by nonlinear effects and feedback. However, there exist some factors that exert significant influence on the dynamics of geomorphosystems, but hardly can be adequately expressed in the language of mathematical models. Conceptual modeling allows us to overcome this difficulty. It is based on the methods of synergetic, which, together with the theory of dynamic systems and classical geomorphology, enable to display the dynamics of geomorphological systems. The most adequate for mathematical modeling of complex systems is the concept of model dynamics based on equilibrium. This concept is based on dynamic equilibrium, the tendency to which is observed in the evolution of all geomorphosystems. As an objective law, it is revealed in the evolution of fluvial relief in general, and in river channel processes in particular, demonstrating the ability of these systems to self-organization. Channel process is expressed in the formation of river reaches, rifts, meanders and floodplain. As floodplain is a periodically flooded surface during high waters, it naturally connects river channel with slopes, being one of boundary expressions of the water stream activity. Floodplain dynamics is inseparable from the channel dynamics. It is formed at simultaneous horizontal and vertical displacement of the river channel, that is at Y=Y(x, y), where х, y - horizontal and vertical coordinates, Y - floodplain height. When dу/dt=0 (for not lowering river channel), the river, being displaced in a horizontal plane, leaves behind a low surface, which flooding during high waters (total duration of flooding) changes from the maximum during the initial moment of time t0 to zero in the moment tn. In a similar manner changed is the total amount of accumulated material on the floodplain surface

  2. [Effectiveness of managing styles of nursing management staff].

    Science.gov (United States)

    Stychno, Ewa

    2002-01-01

    There are many possibilities of the division of the managing styles. In theory one can distinguish two basic styles: directive and integrative. Generalisations describing both styles result in the fact that they do not reflect reality taking place at work. Because of it they cannot be applied in such a form. Therefore, it is necessary to build up the theoretical concept of the managing styles through decreasing their generality and adjusting them to the reality requirements at the same time. For the reality of management Reddin concept seems to be useful. It describes the organizational behaviour of managers. He noticed that the managing style is effective when it fits into the manager's situation whereas it is ineffective in such a situation, when the manager cannot select and adjust the managing techniques to the circumstances of the concrete decision-taking situation. Putting together 3 handling ways: orientation on assignments, orientation on staff, effectiveness, 8 managing can be differentiated. The aim of the paper was an attempt to check what managing styles are used by the nursing management staff working in hospitals. To determine the managing style a questionnaire consisting of 64 statements divided into 8 groups was applied. The examined persons were assigned to distribute 10 points among the statements belonging to each group of tasks which are supposed to specify their solution in the best way. The nursing management staff prefer the styles belonging to the more effective one in which there is a high orientation on staff.

  3. Evaluation of Cueing Innovation for Pressure Ulcer Prevention Using Staff Focus Groups

    Directory of Open Access Journals (Sweden)

    Tracey L. Yap

    2014-07-01

    Full Text Available The purpose of the manuscript is to describe long-term care (LTC staff perceptions of a music cueing intervention designed to improve staff integration of pressure ulcer (PrU prevention guidelines regarding consistent and regular movement of LTC residents a minimum of every two hours. The Diffusion of Innovation (DOI model guided staff interviews about their perceptions of the intervention’s characteristics, outcomes, and sustainability. Methods: This was a qualitative, observational study of staff perceptions of the PrU prevention intervention conducted in Midwestern U.S. LTC facilities (N = 45 staff members. One focus group was held in each of eight intervention facilities using a semi-structured interview protocol. Transcripts were analyzed using thematic content analysis, and summaries for each category were compared across groups. Results: The a priori codes (observability, trialability, compatibility, relative advantage and complexity described the innovation characteristics, and the sixth code, sustainability, was identified in the data. Within each code, two themes emerged as a positive or negative response regarding characteristics of the innovation. Moreover, within the sustainability code, a third theme emerged that was labeled “brainstormed ideas”, focusing on strategies for improving the innovation. Implications: Cueing LTC staff using music offers a sustainable potential to improve PrU prevention practices, to increase resident movement, which can subsequently lead to a reduction in PrUs.

  4. Nutrition and health in hotel staff on different shift patterns.

    Science.gov (United States)

    Seibt, R; Süße, T; Spitzer, S; Hunger, B; Rudolf, M

    2015-08-01

    Limited research is available that examines the nutritional behaviour and health of hotel staff working alternating and regular shifts. To analyse the nutritional behaviour and health of employees working in alternating and regular shifts. The study used an ex post facto cross-sectional analysis to compare the nutritional behaviour and health parameters of workers with alternating shifts and regular shift workers. Nutritional behaviour was assessed with the Food Frequency Questionnaire. Body dimensions (body mass index, waist hip ratio, fat mass and active cell mass), metabolic values (glucose, triglyceride, total cholesterol and low- and high-density lipoprotein), diseases and health complaints were included as health parameters. Participants worked in alternating (n = 53) and regular shifts (n = 97). The average age of subjects was 35 ± 10 years. There was no significant difference in nutritional behaviour, most surveyed body dimensions or metabolic values between the two groups. However, alternating shift workers had significantly lower fat mass and higher active cell mass but nevertheless reported more pronounced health complaints. Sex and age were also confirmed as influencing the surveyed parameters. Shift-dependent nutritional problems were not conspicuously apparent in this sample of hotel industry workers. Health parameters did not show significantly negative attributes for alternating shift workers. Conceivably, both groups could have the same level of knowledge on the health effects of nutrition and comparable opportunities to apply this. Further studies on nutritional and health behaviour in the hotel industry are necessary in order to create validated screening programmes. © The Author 2015. Published by Oxford University Press on behalf of the Society of Occupational Medicine. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  5. Multiple graph regularized protein domain ranking

    KAUST Repository

    Wang, Jim Jing-Yan

    2012-11-19

    Background: Protein domain ranking is a fundamental task in structural biology. Most protein domain ranking methods rely on the pairwise comparison of protein domains while neglecting the global manifold structure of the protein domain database. Recently, graph regularized ranking that exploits the global structure of the graph defined by the pairwise similarities has been proposed. However, the existing graph regularized ranking methods are very sensitive to the choice of the graph model and parameters, and this remains a difficult problem for most of the protein domain ranking methods.Results: To tackle this problem, we have developed the Multiple Graph regularized Ranking algorithm, MultiG-Rank. Instead of using a single graph to regularize the ranking scores, MultiG-Rank approximates the intrinsic manifold of protein domain distribution by combining multiple initial graphs for the regularization. Graph weights are learned with ranking scores jointly and automatically, by alternately minimizing an objective function in an iterative algorithm. Experimental results on a subset of the ASTRAL SCOP protein domain database demonstrate that MultiG-Rank achieves a better ranking performance than single graph regularized ranking methods and pairwise similarity based ranking methods.Conclusion: The problem of graph model and parameter selection in graph regularized protein domain ranking can be solved effectively by combining multiple graphs. This aspect of generalization introduces a new frontier in applying multiple graphs to solving protein domain ranking applications. 2012 Wang et al; licensee BioMed Central Ltd.

  6. J-regular rings with injectivities

    OpenAIRE

    Shen, Liang

    2010-01-01

    A ring $R$ is called a J-regular ring if R/J(R) is von Neumann regular, where J(R) is the Jacobson radical of R. It is proved that if R is J-regular, then (i) R is right n-injective if and only if every homomorphism from an $n$-generated small right ideal of $R$ to $R_{R}$ can be extended to one from $R_{R}$ to $R_{R}$; (ii) R is right FP-injective if and only if R is right (J, R)-FP-injective. Some known results are improved.

  7. Low power implementation of datapath using regularity

    Institute of Scientific and Technical Information of China (English)

    LAI Li-ya; LIU Peng

    2005-01-01

    Datapath accounts for a considerable part of power consumption in VLSI circuit design. This paper presents a method for physical implementation of datapath to achieve low power consumption. Regularity is a characteristic of datapath and the key of the proposed method, where synthesis is tightly combined with placement to make full use of regularity, so that low power consumption is achieved. In This paper, a new concept of Synthesis In Relative Placement (SIRP) is given to deal with the semi-regularity in some datapath. Experimental results of a sample circuit validated the proposed method.

  8. REGULARIZATION OF SINGULAR SYSTEMS BY OUTPUT FEEDBACK

    Institute of Scientific and Technical Information of China (English)

    De-lin Chu; Da-yong Cai

    2000-01-01

    Problem of regularization of a singular system by derivative and proportional output feedback is studied. Necessary and sufficient conditions are obtained under which a singular system can be regularized into a closed-loop system that is regular and of index at most one. The reduced form is given that can easily explore the system properties as well as the feedback to be determined. The main results of the present paper are based on orthogonal transformations. Therefore, they can be implemented by numerically stable ways.

  9. Limitations on Dimensional Regularization in Renyi Entropy

    CERN Document Server

    Bao, Ning

    2016-01-01

    Dimensional regularization is a common method used to regulate the UV divergence of field theoretic quantities. When it is used in the context of Renyi entropy, however, it is important to consider whether such a procedure eliminates the statistical interpretation thereof as a measure of entanglement of states living on a Hilbert space. We therefore examine the dimensionally regularized Renyi entropy of a 4d unitary CFT and show that it admits no underlying Hilbert space in the state-counting sense. This gives a concrete proof that dimensionally regularized Renyi entropy cannot always be obtained as a limit of the Renyi entropy of some finite-dimensional quantum system.

  10. Iterative Regularization with Minimum-Residual Methods

    DEFF Research Database (Denmark)

    Jensen, Toke Koldborg; Hansen, Per Christian

    2007-01-01

    We study the regularization properties of iterative minimum-residual methods applied to discrete ill-posed problems. In these methods, the projection onto the underlying Krylov subspace acts as a regularizer, and the emphasis of this work is on the role played by the basis vectors of these Krylov...... subspaces. We provide a combination of theory and numerical examples, and our analysis confirms the experience that MINRES and MR-II can work as general regularization methods. We also demonstrate theoretically and experimentally that the same is not true, in general, for GMRES and RRGMRES their success...

  11. Hypertension in a female nursing staff-pattern of occurrence, diagnosis, and treatment

    OpenAIRE

    Estela Maria Motta Lima Leão de Aquino; Lucélia Batista Neves Cunha Magalhães; Maria Jenny Araújo; Maria da Conceição Chagas de Almeida; Jackline Pereira Leto

    2001-01-01

    OBJECTIVE: To report the pattern of occurrence, diagnosis, and treatment of hypertension in a female nursing staff of an emergency hospital. METHODS: We carried out a cross-sectional study that included interviews and blood pressure measurements of 494 nursing professionals at an emergency hospital in the city of Salvador, in the state of Bahia, Brazil. We considered hypertensive all individual with blood pressure > or = 140/90 mmHg or normal pressure if on regular treatment. RESULTS: We fo...

  12. On constraining pilot point calibration with regularization in PEST

    Science.gov (United States)

    Fienen, M.N.; Muffels, C.T.; Hunt, R.J.

    2009-01-01

    Ground water model calibration has made great advances in recent years with practical tools such as PEST being instrumental for making the latest techniques available to practitioners. As models and calibration tools get more sophisticated, however, the power of these tools can be misapplied, resulting in poor parameter estimates and/or nonoptimally calibrated models that do not suit their intended purpose. Here, we focus on an increasingly common technique for calibrating highly parameterized numerical models - pilot point parameterization with Tikhonov regularization. Pilot points are a popular method for spatially parameterizing complex hydrogeologic systems; however, additional flexibility offered by pilot points can become problematic if not constrained by Tikhonov regularization. The objective of this work is to explain and illustrate the specific roles played by control variables in the PEST software for Tikhonov regularization applied to pilot points. A recent study encountered difficulties implementing this approach, but through examination of that analysis, insight into underlying sources of potential misapplication can be gained and some guidelines for overcoming them developed. ?? 2009 National Ground Water Association.

  13. Relation of Principal Transformational Leadership to School Staff Job Satisfaction, Staff Turnover, and School Performance

    Science.gov (United States)

    Griffith, James

    2004-01-01

    In the present study, the direct effect of principal transformational leadership to school staff turnover and school performance was examined, in addition to its indirect effect through school staff job satisfaction. Survey data were obtained from elementary school staff and students, and school-aggregated student achievement test scores were…

  14. Exploring Staff Perceptions of Student Plagiarism

    Science.gov (United States)

    Flint, Abbi; Clegg, Sue; Macdonald, Ranald

    2006-01-01

    This paper presents analysis of qualitative data from a research project looking at staff perceptions of plagiarism at a post-1992 university. Twenty-six members of staff from departments and academic schools from across the university took part in open and semi-structured interviews. Analysis shows that variable definitions of plagiarism exist;…

  15. Staff attitudes towards patients with schizophrenia

    DEFF Research Database (Denmark)

    Vendsborg, Per; Bratbo, Johanne; Dannevang, Anders

    2013-01-01

    Stigmatizing attitudes have been reported in international studies among staff in psychiatry. The authors wanted to investigate if this was the case in Denmark.......Stigmatizing attitudes have been reported in international studies among staff in psychiatry. The authors wanted to investigate if this was the case in Denmark....

  16. Does staff diversity imply openness to diversity?

    DEFF Research Database (Denmark)

    Lauring, Jakob; Selmer, Jan

    2013-01-01

    university departments in Denmark. The authors set out to investigate the relationship between different types of staff diversity and openness to diversity in terms of linguistic, visible, value, and informational heterogeneity. Design/methodology/approach – This study uses responses from 489 staff members...

  17. Relating the Curriculum Study to Staff Development.

    Science.gov (United States)

    Clarke, Robert; Snow, Gordon

    Staff development is a school district activity that is generating more activity and becoming more expensive. As the amount of dollars spent increases, so will the demands for accountability and results. Traditional methods for determining staff development programs are inadequate or incomplete. A more effective method is to relate the staff…

  18. 20 CFR 900.5 - Staff.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Staff. 900.5 Section 900.5 Employees' Benefits JOINT BOARD FOR THE ENROLLMENT OF ACTUARIES STATEMENT OF ORGANIZATION § 900.5 Staff. (a) The Executive Director advises and assists the Joint Board directly in carrying out its responsibilities...

  19. Revenue cycle staff education: 3 views.

    Science.gov (United States)

    Schnelle, Lorraine P

    2006-09-01

    Hospital revenue cycle staff education programs should support skill development, address adult learning principles, and use cost-effective methods. Education programs should provide training for both new and existing employees. Educating revenue cycle staff reduces employee turnover, improves compliance, decreases denial write-offs, improves customer satisfaction, and increases point-of-service collections.

  20. Open Educational Resources: Staff Attitudes and Awareness

    Science.gov (United States)

    Rolfe, Vivien

    2012-01-01

    Attitudes are changing in education globally to promote the open sharing of educational courses and resources. The aim of this study was to explore staff awareness and attitudes towards "open educational resources" (OER) as a benchmark for monitoring future progress. Faculty staff (n = 6) were invited to participate in semi-structured…

  1. Exploring Staff Perceptions of Student Plagiarism

    Science.gov (United States)

    Flint, Abbi; Clegg, Sue; Macdonald, Ranald

    2006-01-01

    This paper presents analysis of qualitative data from a research project looking at staff perceptions of plagiarism at a post-1992 university. Twenty-six members of staff from departments and academic schools from across the university took part in open and semi-structured interviews. Analysis shows that variable definitions of plagiarism exist;…

  2. Measuring Staff Turnover in Nursing Homes

    Science.gov (United States)

    Castle, Nicholas G.

    2006-01-01

    Purpose: In this study the levels of staff turnover reported in the nursing home literature (1990-2003) are reviewed, as well as the definitions of turnover used in these prior studies. With the use of primary data collected from 354 facilities, the study addresses the various degrees of bias that result, depending on how staff turnover is defined…

  3. Networking: A Method of Retaining Nursing Staff.

    Science.gov (United States)

    Anderson, Rhonda; And Others

    1983-01-01

    Discusses the problem of turnover among nurses and proposes the use of networking as a means of retaining nursing staff. The plan relies on aspects of the nursing process--assessment, planning, implementation, and evaluation--to retain quality nursing staff. (JOW)

  4. 20 CFR 638.801 - Staff training.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Staff training. 638.801 Section 638.801 Employees' Benefits EMPLOYMENT AND TRAINING ADMINISTRATION, DEPARTMENT OF LABOR JOB CORPS PROGRAM UNDER TITLE IV-B OF THE JOB TRAINING PARTNERSHIP ACT Administrative Provisions § 638.801 Staff training....

  5. Using the Theory of Planned Behavior to predict pregnant women's intention to engage in regular exercise.

    Science.gov (United States)

    Lee, Ching-Fang; Chiang, I-Chyun; Hwang, Fang-Ming; Chi, Li-Kang; Lin, Hsien-Ming

    2016-11-01

    the objectives of this study were to use the Theory of Planned Behavior (TPB) in order to determine to what degree pregnant women intended to exercise regularly during pregnancy, and then to evaluate the TPB model fit. this study was based on a cross-sectional survey with a tool which was developed specifically for this study. we identified and invited pregnant women from two medical center hospitals and one certified prenatal center in northern Taiwan to participate. using purposive sampling, we selected participants who were in at least the 12th week of gestation and did not have a high-risk pregnancy. 621 completed the instrument, their mean age was 31.76 (SD=3.87). a self-administered instrument was used to determine the firmness of participants' intention to engage in regular exercise during pregnancy. The data were analyzed using SPSS 19.0 software and LISREL 8.72 software. of the pregnant women in our study, 64.2% were found to be likely to exercise regularly up until delivery. The TPB was used to arrive at specific findings with regard to "intention to exercise regularly during pregnancy." Our participants demonstrated a positive intention to exercise regularly, a positive attitude (ATT), positive subjective norms (SN) and positive perceived behavioral controls (PBC) during pregnancy. The most influential factor in determining the participants' positive intention to exercise was found to be PBC (β=0.68, pintention. Overall, the final model explained 59% of the variation in "intention to exercise regularly." KEY CONCLUSION AND IMPLICATION FOR PRACTICE: the most important factor in determining the participants' intention to exercise regularly was PBC, followed by the SN. Medical staff members should be able to help pregnant women overcome obstacles to regular exercise, for example, by assisting in providing appropriate resources. Copyright © 2016 Elsevier Ltd. All rights reserved.

  6. Could Regular Pot Smoking Harm Vision?

    Science.gov (United States)

    ... fullstory_162441.html Could Regular Pot Smoking Harm Vision? Study suggests that it might slow signaling among ... may be linked to a limited degree of vision impairment, a new French study suggests. The finding ...

  7. Regular-fat dairy and human health

    DEFF Research Database (Denmark)

    Astrup, Arne; Bradley, Beth H Rice; Brenna, J Thomas

    2016-01-01

    In recent history, some dietary recommendations have treated dairy fat as an unnecessary source of calories and saturated fat in the human diet. These assumptions, however, have recently been brought into question by current research on regular fat dairy products and human health. In an effort...... dairy foods have on human health. The emerging scientific evidence indicates that the consumption of regular fat dairy foods is not associated with an increased risk of cardiovascular disease and inversely associated with weight gain and the risk of obesity. Dairy foods, including regular-fat milk...... to disseminate, explore and discuss the state of the science on the relationship between regular fat dairy products and health, symposia were programmed by dairy industry organizations in Europe and North America at The Eurofed Lipids Congress (2014) in France, The Dairy Nutrition Annual Symposium (2014...

  8. The regularization of Old English weak verbs

    Directory of Open Access Journals (Sweden)

    Marta Tío Sáenz

    2015-07-01

    Full Text Available This article deals with the regularization of non-standard spellings of the verbal forms extracted from a corpus. It addresses the question of what the limits of regularization are when lemmatizing Old English weak verbs. The purpose of such regularization, also known as normalization, is to carry out lexicological analysis or lexicographical work. The analysis concentrates on weak verbs from the second class and draws on the lexical database of Old English Nerthus, which has incorporated the texts of the Dictionary of Old English Corpus. As regards the question of the limits of normalization, the solution adopted are, in the first place, that when it is necessary to regularize, normalization is restricted to correspondences based on dialectal and diachronic variation and, secondly, that normalization has to be unidirectional.

  9. On π-regularity of General Rings

    Institute of Scientific and Technical Information of China (English)

    CHEN WEI-XING; CUI SHU-YING

    2010-01-01

    A general ring means an associative ring with or without identity. An idempotent e in a general ring I is called left (right) semicentral if for every x∈ I,xe = exe (ex = exe). And I is called semiabelian ff every idempotent in I is left or right semicentral. It is proved that a semiabelian general ring I is π-regular if and only ff the set N(I) of nilpotent elements in I is an ideal of I and I/N(I) is regular. It follows that if I is a semiabelian general ring and K is an ideal of I,then I is π-regular if and only if both K and I/K are r-regular. Based on this we prove that every semiabelian GVNL-ring is an SGVNL-ring. These generalize several known results on the relevant subject. Furthermore we give a characterization of a semiabelian GVNL-ring.

  10. A Biordered Set Representation of Regular Semigroups

    Institute of Scientific and Technical Information of China (English)

    Bing Jun YU; Mang XU

    2005-01-01

    In this paper, for an arbitrary regular biordered set E, by using biorder-isomorphisms between the ω-ideals of E, we construct a fundamental regular semigroup WE called NH-semigroup of E, whose idempotent biordered set is isomorphic to E. We prove further that WE can be used to give a new representation of general regular semigroups in the sense that, for any regular semigroup S with the idempotent biordered set isomorphic to E, there exists a homomorphism from S to WE whose kernel is the greatest idempotent-separating congruence on S and the image is a full symmetric subsemigroup of WE. Moreover, when E is a biordered set of a semilattice E0, WE is isomorphic to the Munn-semigroup TE0; and when E is the biordered set of a band B, WE is isomorphic to the Hall-semigroup WB.

  11. Regularities and Radicals in Near-rings

    Institute of Scientific and Technical Information of China (English)

    N.J. Groenewald

    2002-01-01

    Let F be a regularity for near-rings and F(R) the largest FR-regular ideal in R. In the first part of this paper, we introduce the concepts of maximal Fmodular ideals and F-primitive near-rings to characterize F(R) for any near-ring regularity F. Under certain conditions, F(R) is equal to the intersection of all the maximal F-modular ideals of R. As examples, we apply this to the different analogs of the Brown-McCoy radicals and also the Behrens radicals. In the last part of this paper, we show that for certain regularities, the class of F-primitive near-rings forms a special class.

  12. Spectral partitioning of random regular blockmodels

    CERN Document Server

    Barucca, Paolo

    2016-01-01

    Graph partitioning problems emerge in a wide variety of complex systems, ranging from biology to finance, but can be rigorously analyzed and solved only for a few graph ensembles. Here, an ensemble of random graphs with regular block structure is introduced, for which analytical results can be obtained. In particular, the spectral density of such random regular blockmodels is computed exactly for a modular, bipartite and core-periphery structure. McKay's law for random regular graphs is found analytically to apply also for regular modular and bipartite structures when blocks are homogeneous. In core-periphery structures, where blocks are intrinsically heterogeneous, a new law is found to apply for the spectral density. Exact solution to the inference problem is provided for the models discussed. All analytical results show perfect agreement with numerical experiments. Final discussion summarizes results and outlines the relevance of the results for the solution of graph partitioning problems in other graph en...

  13. Comparability for ideals of regular rings

    Institute of Scientific and Technical Information of China (English)

    CHEN Huanyin

    2005-01-01

    In this paper we investigate necessary and sufficient conditions under which the ideals possess comparability structure. For regular rings, we prove that every square matrix over ideals satisfying general comparability admits a diagonal reduction by quasi invertible matrices.

  14. Regularity of optimal transport maps and applications

    CERN Document Server

    Philippis, Guido

    2013-01-01

    In this thesis, we study the regularity of optimal transport maps and its applications to the semi-geostrophic system. The first two chapters survey the known theory, in particular there is a self-contained proof of Brenier’ theorem on existence of optimal transport maps and of Caffarelli’s Theorem on Holder continuity of optimal maps. In the third and fourth chapter we start investigating Sobolev regularity of optimal transport maps, while in Chapter 5 we show how the above mentioned results allows to prove the existence of Eulerian solution to the semi-geostrophic equation. In Chapter 6 we prove partial regularity of optimal maps with respect to a generic cost functions (it is well known that in this case global regularity can not be expected). More precisely we show that if the target and source measure have smooth densities the optimal map is always smooth outside a closed set of measure zero.

  15. [Turnover of Non-medical Staff in Outpatient Oncology Practices: Is Building Social Capital a Solution?].

    Science.gov (United States)

    Gloede, T D; Ernstmann, N; Baumann, W; Groß, S E; Ansmann, L; Nitzsche, A; Neumann, M; Wirtz, M; Schmitz, S; Schulz-Nieswandt, F; Pfaff, H

    2015-11-01

    While a lot is known about potential and actual turnover of non-medical hospital staff, only few data exist for the outpatient setting. In addition, little is known about actual instruments which leaders can use to influence staff turnover in physician practices. In the literature, the social capital of an organisation, which means the amount of trust, common values and reciprocal behaviour in the organisation, has been discussed as a possible field of action. In the present study, staff turnover as perceived by outpatient haematologists and oncologists is presented and analysed as to whether social capital is associated with that staff turnover. In conclusion, measures to increase the social capital of a practice are presented. The present study is based on data gathered in a questionnaire-based survey with members of the Professional Organisation of -Office-Based Haematologists and Oncologists (N=551). The social capital of the practice was captured from the haematologists and oncologists using an existing and validated scale. To analyse the impact of the practice's social capital on staff turnover, as perceived by the physicians, bivariate correlations and linear regression analyses were calculated. In total, 152 haematologists and oncologists participated in the study which represents a response rate of 28%. In the regression analyses, social capital appears as a significant and strong predictor of staff turnover (beta=-0.34; pstaff turnover although the underlying study design does not allow for drawing causal conclusions regarding this relationship. To create social capital in their practice, outpatient physicians may apply measures that facilitate social interaction among staff, foster trust and facilitate cooperation. Such measures may already be applied when hiring and training new staff, but also continuously when leading employees and when organising work tasks, e.g., by establishing regular team meetings. © Georg Thieme Verlag KG Stuttgart · New York.

  16. Study on the Regularity of Prescription for IgA Nephropathy Basing on Text Mining Technique with Chinese Patent Medicine and West Medicine%基于文本挖掘技术的中成药及西药治疗IgA肾病用药规律研究

    Institute of Scientific and Technical Information of China (English)

    蔡峰; 郑光; 郭洪涛; 姜淼; 谭勇; 杨静; 张弛; 张志华; 吕爱平

    2011-01-01

    Objective:To explore the data to reveal meaningful regularity of Chinese patent medicine and west medicine. Methods: Papers from large data sets of IgA nephropathy were used to set the Acess database. And then,these articles were used to data processing by the SQL. After article denoise,the regulation of IgA nephropathy was analyzed about the TCM medicine and the west medicine. Results:Glucoside Tripterygium Total, Huangkui Capsule ,hemostasis tablets,Bailing Capsule were the commonly used Chinese patent medicine. Im-munosuppressive agents, ACEI, glucocorticoids, ARB were of the core west medicine. Glucoside Tripterygium Total, Huangkui Capsule and ACEI,ARB,glucocorticoids were often used in conjunction with Chinese patent medicine and western medicine. Conclusion:The result,which provides an objective basis with text mining technique, not only reflects the actual clinical use,but also expands the scope of clinical medicine for the scientific and rational use of Chinese proprietary medicine and west medicine.%目的 利用文本挖掘技术探索中成药及西药治疗IgA肾病的用药规律.方法在中国生物医学文献数据库(CBM)中采集治疗IgA肾病的相关文献,建立Access数据库,运用SQL对数据进行处理,结合人工降噪后,分析中成药及西药治疗IgA肾病的用药规律.结果雷公藤多苷片、黄葵胶囊、止血片、百令胶囊等依次为治疗IgA肾病的高频中成药;免疫抑制剂、ACEI、糖皮质激素、ARB等依次为治疗IgA肾病的高频西药;雷公藤多苷片、黄葵胶囊和ACEI、ARB、糖皮质激素分别是联用时常用的中成药和西药.结论文本挖掘能够分析中成药及西药治疗IgA肾病的用药规律,获得的结果不仅反映了临床用药实际,而且拓展了临床用药的范畴与思路,为科学合理地使用中成药及西药提供了客观依据.

  17. Experimental evidence for formation mechanism of regular circular fringes

    Science.gov (United States)

    Wang, Y.; Zhu, R.; Wang, G.; Wang, P.; Li, H.; Zhang, W.; Ren, G.

    2016-10-01

    Laser active suppressing jamming is one of the most effective technologies to cope with optoelectric imaging systems. In the process of carrying out laser disturbing experiment, regular circular fringes often appeared on the detector, besides laser spot converging by optical system. First of all, the formation of circular fringes has been experimentally investigated by using a simple converging lens to replace the complex optical system. Moreover, circular fringes have been simulated based on the interference theory of coherent light. The coherence between the experimental phenomena and the simulated results showed that the formation mechanism of regular circular fringes was the interference effect between reflected light by back surface of lens and directly refractive light on the detector. At last, the visibility of circular fringes has been calculated from 0.05 to 0.22 according to the current plating standard of lens surface and manufacture technique of optoelectric detector.

  18. Point-splitting regularization of composite operators and anomalies

    CERN Document Server

    Novotny, J

    2000-01-01

    The point-splitting regularization technique for composite operators is discussed in connection with anomaly calculation. We present a pedagogical and self-contained review of the topic with an emphasis on the technical details. We also develop simple algebraic tools to handle the path ordered exponential insertions used within the covariant and non-covariant version of the point-splitting method. The method is then applied to the calculation of the chiral, vector, trace, translation and Lorentz anomalies within diverse versions of the point-splitting regularization and a connection between the results is described. As an alternative to the standard approach we use the idea of deformed point-split transformation and corresponding Ward-Takahashi identities rather than an application of the equation of motion, which seems to save the complexity of the calculations.

  19. Random noise attenuation using an improved anisotropic total variation regularization

    Science.gov (United States)

    Gemechu, Diriba; Yuan, Huan; Ma, Jianwei

    2017-09-01

    In seismic data processing, attenuation of random noise from the observed data is the basic step which improves the signal-to-noise ratio (SNR) of seismic data. In this paper, we proposed an anisotropic total bounded variation regularization approach to attenuate noise. An improved constraint convex optimization model is formulated for this approach and then the split Bregman algorithm is used to solve the optimization model. Generalized cross validation (GCV) technique is used to estimate the regularization parameter. Synthetic and real seismic data are considered to show the out performance of the proposed method in terms of event-preserving denoising, in comparison with FX deconvolution, shearlet hard thresholding, and anisotropic total variation methods. The numerical results indicate that the proposed method effectively attenuates random noise by preserving the structure and important features of seismic data.

  20. Genealogies of regular exchangeable coalescents with applications to sampling

    CERN Document Server

    Limic, Vlada

    2010-01-01

    This article considers a model of genealogy corresponding to a regular exchangeable coalescent (also known as Xi-coalescent) started from a large finite configuration, and undergoing neutral mutations. Asymptotic expressions for the number of active lineages were obtained by the author in a previous work. Analogous results for the number of active mutation-free lineages and the combined lineage lengths are derived using the same martingale-based technique. They are given in terms of convergence in probability, while extensions to convergence in moments and convergence almost surely are discussed. The above mentioned results have direct consequences on the sampling theory in the Xi-coalescent setting. In particular, the regular Xi-coalescents that come down from infinity (i.e., with locally finite genealogies), have an asymptotically equal number of families under the corresponding infinite alleles and infinite sites models. In special cases, quantitative asymptotic formulae for the number of families that con...

  1. Facial Affect Recognition Using Regularized Discriminant Analysis-Based Algorithms

    Directory of Open Access Journals (Sweden)

    Cheng-Yuan Shih

    2010-01-01

    Full Text Available This paper presents a novel and effective method for facial expression recognition including happiness, disgust, fear, anger, sadness, surprise, and neutral state. The proposed method utilizes a regularized discriminant analysis-based boosting algorithm (RDAB with effective Gabor features to recognize the facial expressions. Entropy criterion is applied to select the effective Gabor feature which is a subset of informative and nonredundant Gabor features. The proposed RDAB algorithm uses RDA as a learner in the boosting algorithm. The RDA combines strengths of linear discriminant analysis (LDA and quadratic discriminant analysis (QDA. It solves the small sample size and ill-posed problems suffered from QDA and LDA through a regularization technique. Additionally, this study uses the particle swarm optimization (PSO algorithm to estimate optimal parameters in RDA. Experiment results demonstrate that our approach can accurately and robustly recognize facial expressions.

  2. Pediatric and staff dose evaluation in fluoroscopy upper gastrointestinal series

    Energy Technology Data Exchange (ETDEWEB)

    Filipov, Danielle; Nascimento, Eduarda X. do; Lacerda, Camila M., E-mail: diilipov@utfpr.edu.br [Universidade Tecnologica Federal do Parana (UFTPR), Curitiba, PR (Brazil); Schelin, Hugo R.; Ledesma, Jorge A.; Denyak, Valeriy; Legnani, Adriano, E-mail: ledesmajorgealberto@gmail.com [Instituto de Pesquisa Pele Pequeno Principe, Curitiba, PR (Brazil)

    2014-07-01

    Fluoroscopy upper GI series are widely used for the diagnosis of gastroesophageal reflux disease in children. Pediatric radiological procedures bring concern due to the high life expectancy and radiosensitivity on children, as well as the risks to the exposed staff Important studies present the mean KAP values on patients and the European Commission (EC) recommends specific techniques for these procedures. For the occupational expositions, staffs doses must be within the annual limit, according to the CNEN 3.01. Based on those data, the aims of the current study are: analyzing the upper GI procedure; determining the KAP on the patient and estimating the annual equivalent dose on the staff's crystalline. LiF :Mg,Ti TLDs were positioned on the patient upper chest center, so that the entrance surface air kerma could be determined. The field size on the patient s surface and the kerma were multiplied so that the KAP was obtained. LiF:Mg,Cu,P dosimeters were used to estimate the equivalent dose on the staff s crystalline. The results showed discrepancy in the kVp range and in the exposure time when compared to the EC data. The mean KAP values for the 0-1,1-3 and 3-10 years old patients were, respectively: 102 ± 19 cGy.cm2, 142 ± 25 cGy.cm2 and 323 ± 39 cGy.cm2; which are higher than the KAPs presented in the studies used for comparison. The estimated annual equivalent dose in the staff s crystalline would be approximately 85% higher than the limit set by the CNEN. Analyzing the data, it becomes clear that an optimization implementation is necessary in order to reduce the radiation levels. (author)

  3. Causes of institutionalism: patient and staff perspectives.

    Science.gov (United States)

    Wirt, G L

    1999-01-01

    Institutionalism is a pattern of passive, dependent behavior observed among psychiatric inpatients, characterized by hospital attachment and resistance to discharge. Survey research was conducted with 211 staff and 47 "institutionalized" patients in a public psychiatric hospital to determine their beliefs on the causes of institutionalism. Four explanatory models of institutionalism were investigated: the predisposition model, the total institution model, the asylum model, and the symptoms model. Patients and staff differed on all models. Responses indicated acceptance of multiple causes for the phenomenon, with patients and staff showing highest agreement on the need for hospitalization as asylum from the world. Patients and staff differed most on the role of the institution in promoting institutionalism. Job classification of staff also resulted in significant differences in beliefs on all models except the asylum model.

  4. On Comparison of Adaptive Regularization Methods

    DEFF Research Database (Denmark)

    Sigurdsson, Sigurdur; Larsen, Jan; Hansen, Lars Kai

    2000-01-01

    , a very flexible regularization may substitute the need for selection procedures. This paper investigates recently suggested adaptive regularization schemes. Some methods focus directly on minimizing an estimate of the generalization error (either algebraic or empirical), whereas others start from...... different criteria, e.g., the Bayesian evidence. The evidence expresses basically the probability of the model, which is conceptually different from generalization error; however, asymptotically for large training data sets they will converge. First the basic model definition, training and generalization...

  5. *-Regular Leavitt Path Algebras of Arbitrary Graphs

    Institute of Scientific and Technical Information of China (English)

    Gonzalo ARANDA PINO; Kulumani RANGASWAMY; Lia VA(S)

    2012-01-01

    If K is a field with involution and E an arbitrary graph,the involution from K naturally induces an involution of the Leavitt path algebra LK(E).We show that the involution on LK(E) is proper if the involution on K is positive-definite,even in the case when the graph E is not necessarily finite or row-finite.It has been shown that the Leavitt path algebra LK(E) is regular if and only if E is acyclic.We give necessary and sufficient conditions for LK(E) to be *-regular (i.e.,regular with proper involution).This characterization of *-regularity of a Leavitt path algebra is given in terms of an algebraic property of K,not just a graph-theoretic property of E.This differs from the.known characterizations of various other algebraic properties of a Leavitt path algebra in terms of graphtheoretic properties of E alone.As a corollary,we show that Handelman's conjecture (stating that every *-regular ring is unit-regular) holds for Leavitt path algebras.Moreover,its generalized version for rings with local units also continues to hold for Leavitt path algebras over arbitrary graphs.

  6. Training and Practices of Cannabis Dispensary Staff.

    Science.gov (United States)

    Haug, Nancy A; Kieschnick, Dustin; Sottile, James E; Babson, Kimberly A; Vandrey, Ryan; Bonn-Miller, Marcel O

    2016-01-01

    Introduction: The proliferation of cannabis dispensaries within the United States has emerged from patient demand for the legalization of cannabis as an alternative treatment for a number of conditions and symptoms. Unfortunately, nothing is known about the practices of dispensary staff with respect to recommendation of cannabis strains/concentrations for specific patient ailments. To address this limitation, the present study assessed the training and practices of cannabis dispensary staff. Materials and Methods: Medical and nonmedical dispensary staff (n=55) were recruited via e-mail and social media to complete an online survey assessing their demographic characteristics, dispensary features, patient characteristics, formal training, and cannabis recommendation practices. Results: Fifty-five percent of dispensary staff reported some formal training for their position, with 20% reporting medical/scientific training. A majority (94%) indicated that they provide specific cannabis advice to patients. In terms of strains, dispensary staff trended toward recommendations of Indica for anxiety, chronic pain, insomnia, nightmares, and Tourette's syndrome. They were more likely to recommend Indica and hybrid plants for post-traumatic stress disorder (PTSD)/trauma and muscle spasms. In contrast, staff were less likely to recommend Indica for depression; hybrid strains were most often recommended for amyotrophic lateral sclerosis (ALS). In terms of cannabinoid concentrations, dispensary staff were most likely to recommend a 1:1 ratio of delta-9-tetrahydrocannabinol (THC):cannabidiol (CBD) for patients suffering from anxiety, Crohn's disease, hepatitis C, and PTSD/trauma, while patients seeking appetite stimulation were most likely to be recommended THC. Staff recommended high CBD for arthritis and Alzheimer's disease and a high CBD or 1:1 ratio for ALS, epilepsy, and muscle spasms. Conclusions: Although many dispensary staff are making recommendations consistent with

  7. Robust joint full-waveform inversion of time-lapse seismic data sets with total-variation regularization

    CERN Document Server

    Maharramov, Musa

    2014-01-01

    We present a technique for reconstructing subsurface velocity model changes from time-lapse seismic survey data using full-waveform inversion (FWI). The technique is based on simultaneously inverting multiple survey vintages, with model difference regularization using the total variation (TV) seminorm. We compare the new TV-regularized time-lapse FWI with the $L_2$-regularized joint inversion proposed in our earlier work, using synthetic data sets that exhibit survey repeatability issues. The results demonstrate clear advantages of the proposed TV-regularized joint inversion over alternatives methods for recovering production-induced model changes that are due to both fluid substitution and geomechanical effects.

  8. POTENTIAL STAFF AND THE IMPACT OF INNOVATION ON ITS DEVELOPMENT

    Directory of Open Access Journals (Sweden)

    N. A. Zenova

    2015-01-01

    Full Text Available Solving the problem of staff capacity is now becoming a fundamental condition for improving the competitiveness of products and services to organizations of various forms of ownership. As new, purposefully produced and used by producers of knowledge allow them to apply new and more efficient methods of production and raise incomes. To stay on the market, manufacturers are forced to adopt these techniques work and develop them, as well as to acquire and use other new knowledge. Thus, a highly modern production is characterized by a constant and significant variability, which implies a corresponding enrichment of professional outlook and experience of employees. In this regard, staff capacity, which is a set of capabilities and abilities to perform a certain type of work is transformed under the influence of constantly introducing innovative technologies. 

  9. [Burnout syndrome among health staff].

    Science.gov (United States)

    Curiel-García, José Angel; Rodríguez-Morán, Martha; Guerrero-Romero, Fernando

    2006-01-01

    To determine the prevalence of burnout syndrome components among the medical and nursing staff of the second care level hospitals of the Instituto Mexicano del Seguro Social and Instituto de Seguridad Social al Servicio de los Trabajadores del Estado from Durango, Mexico. A cross-sectional comparative study was carried out among 73 physicians and 100 nurses randomly selected from both hospitals. The prevalence of burnout syndrome components was established by the Maslash Burnout Inventory, which determines the presence of physical/emotional exhaustion, depersonalization, and labor performance. In addition, sociodemographic and labor information was collected. Prevalence was calculated with a reliability interval of 95% (CI 95%). 73 physicians and 100 nurses enrolled, corresponding to 22.8% and 14.5% of such personnel working in both institutions. Among the IMSS and ISSSTE workers respectively, the prevalence of depersonalization was 43.2% (34.4-52.9) and 14.5% (6.8-25.8), whereas the prevalence of physical/emotional exhaustion was 41.4% (32.7-51.1) and 19.4% (10.4-31.4). Pre-valence of labor performance was higher among the personnel of Instituto Mexicano del Seguro Social: 99.1% (95.1-100) versus 96.8% (88.8-100). Severe depersonalization (p = 0.004), but not emotional exhaustion (p = 0.09) nor labor performance (p = 0.06) was significantly higher among personnel working at the Instituto Mexicano del Seguro Social. Prevalence of depersonalization and physical/emotional exhaustion was higher among physicians and nurses of the Instituto Mexicano del Seguro Social; nonetheless, their labor performance was high. Our finding suggests that personnel working at the Instituto Mexicano del Seguro Social make a greater effort to maintain the high labor performance that medical care requires.

  10. Digital image correlation involves an inverse problem: A regularization scheme based on subset size constraint

    Science.gov (United States)

    Zhan, Qin; Yuan, Yuan; Fan, Xiangtao; Huang, Jianyong; Xiong, Chunyang; Yuan, Fan

    2016-06-01

    Digital image correlation (DIC) is essentially implicated in a class of inverse problem. Here, a regularization scheme is developed for the subset-based DIC technique to effectively inhibit potential ill-posedness that likely arises in actual deformation calculations and hence enhance numerical stability, accuracy and precision of correlation measurement. With the aid of a parameterized two-dimensional Butterworth window, a regularized subpixel registration strategy is established, in which the amount of speckle information introduced to correlation calculations may be weighted through equivalent subset size constraint. The optimal regularization parameter associated with each individual sampling point is determined in a self-adaptive way by numerically investigating the curve of 2-norm condition number of coefficient matrix versus the corresponding equivalent subset size, based on which the regularized solution can eventually be obtained. Numerical results deriving from both synthetic speckle images and actual experimental images demonstrate the feasibility and effectiveness of the set of newly-proposed regularized DIC algorithms.

  11. Evaluation of the Stallings Classroom Management Staff Development Demonstration Project in Putnam County, West Virginia.

    Science.gov (United States)

    Meehan, Merrill L.

    An evaluation is presented of the Stallings Classroom Management Staff Development Demonstration Project, designed to increase student achievement in basic skills through the use of research-based, systematic change in teachers' classroom management and organizational techniques. One objective of the evaluation was to utilize techniques and to…

  12. A Delphi Study on Staff Bereavement Training in the Intellectual and Developmental Disabilities Field

    Science.gov (United States)

    Gray, Jennifer A.; Truesdale, Jesslyn

    2015-01-01

    The Delphi technique was used to obtain expert panel consensus to prioritize content areas and delivery methods for developing staff grief and bereavement curriculum training in the intellectual and developmental disabilities (IDD) field. The Delphi technique was conducted with a panel of 18 experts from formal and informal disability caregiving,…

  13. The Staff Association and its history

    CERN Multimedia

    Staff Association

    2015-01-01

    The Staff Association will celebrate its 60th birthday in the spring of 2015. We are collecting all information about the sixty years of the Staff Association. In particular, we are looking at publications of the Staff Association, which started with the “Staff Association Journal”, in 1955, which later became “Le Proton déchainé”, then, more simply, “Proton” in 1982 (the figure on the left shows the different mutations of our magazine). In our collection we are missing a few issues, in particular № 1 (dated mid-1955).     Dear reader, if have any old issues of this magazine, or of Graviton (figure on the right), another magazine edited by the Staff Association, or any other material or information that might help us document the history of the Staff Association, we would very much like to have a copy of the material or your contribution (written or oral). Please contact the Staff Association Sec...

  14. Compressive sensing via nonlocal low-rank regularization.

    Science.gov (United States)

    Dong, Weisheng; Shi, Guangming; Li, Xin; Ma, Yi; Huang, Feng

    2014-08-01

    Sparsity has been widely exploited for exact reconstruction of a signal from a small number of random measurements. Recent advances have suggested that structured or group sparsity often leads to more powerful signal reconstruction techniques in various compressed sensing (CS) studies. In this paper, we propose a nonlocal low-rank regularization (NLR) approach toward exploiting structured sparsity and explore its application into CS of both photographic and MRI images. We also propose the use of a nonconvex log det ( X) as a smooth surrogate function for the rank instead of the convex nuclear norm and justify the benefit of such a strategy using extensive experiments. To further improve the computational efficiency of the proposed algorithm, we have developed a fast implementation using the alternative direction multiplier method technique. Experimental results have shown that the proposed NLR-CS algorithm can significantly outperform existing state-of-the-art CS techniques for image recovery.

  15. Smoothing-Norm Preconditioning for Regularizing Minimum-Residual Methods

    DEFF Research Database (Denmark)

    Hansen, Per Christian; Jensen, Toke Koldborg

    2006-01-01

    When GMRES (or a similar minimum-residual algorithm such as RRGMRES, MINRES, or MR-II) is applied to a discrete ill-posed problem with a square matrix, in some cases the iterates can be considered as regularized solutions. We show how to precondition these methods in such a way that the iterations...... take into account a smoothing norm for the solution. This technique is well established for CGLS, but it does not immediately carry over to minimum-residual methods when the smoothing norm is a seminorm or a Sobolev norm. We develop a new technique which works for any smoothing norm of the form $\\|L......\\,x\\|_2$ and which preserves symmetry if the coefficient matrix is symmetric. We also discuss the efficient implementation of our preconditioning technique, and we demonstrate its performance with numerical examples in one and two dimensions....

  16. The Least Regular Order with Respect to a Regular Congruence on Ordered Γ-Semigroups

    Institute of Scientific and Technical Information of China (English)

    Manoj SIRIPITUKDET; Aiyared IAMPAN

    2012-01-01

    The motivation mainly comes from the conditions of congruences to be regular that are of importance and interest in ordered semigroups.In 1981,Sen has introduced the concept of the Γ-semigroups.We can see that any semigroup can be considered as a Γ-semigroup.In this paper,we introduce and characterize the concept of the regular congruences on ordered Γ-semigroups and prove the following statements on an ordered Γ-semigroup M:(1) Every ordered semilattice congruences is a regular congruence.(2) There exists the least regular order on the T-semigroup M/p with respect to a regular congruence p on M.(3) The regular congruences are not ordered semilattice congruences in general.

  17. A Construction for P-Regular Semigroups

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    @@A regular semigroup S with a special involution *, i.e., a unaryoperation on S satisfying (x*)*=x, xx*x=x, (xy)*=y*x* x, y S, is called a regular *-semigroup[1]. It has been shown by Yamada[2] that a regular semigroup S is a regular *-semigroup if and only if ithas a P-system, that is to say, there is a subset P ofE(S) such that   (c.1) (1) ( p, q P) pq E(S), pqp P;   (2) ( a S) ( | a+ V(a)) aP1a+, a+P1a P.As a generalization of regular *-semigroup and orthodox semigroup,Yamada[3] defined P-regular semigroup. Let S be a regularsemigroup. A subset P of E(S) is called a C-set in S if   (c.2) (1) ( p, q P) pq E(S), pqp P;   (2) ( a S) ( a+ V(a)) aP1a+, a+P1a P.   In this case, (S,P) forms a P-regular semigroup, innotation S(P). The element a+ in(c.2) (2) is called a P-inverse of a. The set of all P-inverses of a is denoted by VP(a). S(P) is said to bestrongly, meanwhile P is called a strong C-set in S, ifVP(p) P for all p P. A partial groupoid E as well as its partial subgroupoid Pforms a P-regular partial band and is denoted by E(P) if itis exactly the subalgebra of the idempotents in some P-regularsemigroup S(P). In this case, S(P) is called an adjacentsemigroup E(P). All P-regular partial bands are obtained inZhang and He[4].

  18. Food poisoning in a hospital staff canteen.

    Science.gov (United States)

    White, P M

    1986-09-01

    Eighty-two confirmed cases of salmonella food poisoning arose among hospital staff due to consuming contaminated tartar sauce served in the staff canteen. Many key personnel were affected and the hospital was closed to non-urgent admissions. In order to maintain the accident and trauma services, the normal policy of excluding infected persons from work had to be modified. Staff returned to work 48 h after they had become asymptomatic provided that they did not have contact with patients' mouths, food or drink. There were no secondary cases. During the investigation of the outbreak, lack of national guidelines for the preparation and handling of mayonnaise-based food products became apparent.

  19. Counting colorings of a regular graph

    CERN Document Server

    Galvin, David

    2012-01-01

    At most how many (proper) q-colorings does a regular graph admit? Galvin and Tetali conjectured that among all n-vertex, d-regular graphs with 2d|n, none admits more q-colorings than the disjoint union of n/2d copies of the complete bipartite graph K_{d,d}. In this note we give asymptotic evidence for this conjecture, giving an upper bound on the number of proper q-colorings admitted by an n-vertex, d-regular graph of the form a^n b^{n(1+o(1))/d} (where a and b depend on q and where o(1) goes to 0 as d goes to infinity) that agrees up to the o(1) term with the count of q-colorings of n/2d copies of K_{d,d}. An auxiliary result is an upper bound on the number of colorings of a regular graph in terms of its independence number. For example, we show that for all even q and fixed \\epsilon > 0 there is \\delta=\\delta(\\epsilon,q) such that the number of proper q-colorings admitted by an n-vertex, d-regular graph with no independent set of size n(1-\\epsilon)/2 is at most (a-\\delta)^n.

  20. Regularities, Natural Patterns and Laws of Nature

    Directory of Open Access Journals (Sweden)

    Stathis Psillos

    2014-02-01

    Full Text Available  The goal of this paper is to sketch an empiricist metaphysics of laws of nature. The key idea is that there are regularities without regularity-enforcers. Differently put, there are natural laws without law-makers of a distinct metaphysical kind. This sketch will rely on the concept of a natural pattern and more significantly on the existence of a network of natural patterns in nature. The relation between a regularity and a pattern will be analysed in terms of mereology.  Here is the road map. In section 2, I will briefly discuss the relation between empiricism and metaphysics, aiming to show that an empiricist metaphysics is possible. In section 3, I will offer arguments against stronger metaphysical views of laws. Then, in section 4 I will motivate nomic objectivism. In section 5, I will address the question ‘what is a regularity?’ and will develop a novel answer to it, based on the notion of a natural pattern. In section 6, I will raise the question: ‘what is a law of nature?’, the answer to which will be: a law of nature is a regularity that is characterised by the unity of a natural pattern.

  1. Mining High Utility Itemsets with Regular Occurrence

    Directory of Open Access Journals (Sweden)

    Komate Amphawan

    2016-09-01

    Full Text Available High utility itemset mining (HUIM plays an important role in the data mining community and in a wide range of applications. For example, in retail business it is used for finding sets of sold products that give high profit, low cost, etc. These itemsets can help improve marketing strategies, make promotions/ advertisements, etc. However, since HUIM only considers utility values of items/itemsets, it may not be sufficient to observe product-buying behavior of customers such as information related to “regular purchases of sets of products having a high profit margin”. To address this issue, the occurrence behavior of itemsets (in the term of regularity simultaneously with their utility values was investigated. Then, the problem of mining high utility itemsets with regular occurrence (MHUIR to find sets of co-occurrence items with high utility values and regular occurrence in a database was considered. An efficient single-pass algorithm, called MHUIRA, was introduced. A new modified utility-list structure, called NUL, was designed to efficiently maintain utility values and occurrence information and to increase the efficiency of computing the utility of itemsets. Experimental studies on real and synthetic datasets and complexity analyses are provided to show the efficiency of MHUIRA combined with NUL in terms of time and space usage for mining interesting itemsets based on regularity and utility constraints.

  2. On a correspondence between regular and non-regular operator monotone functions

    DEFF Research Database (Denmark)

    Gibilisco, P.; Hansen, Frank; Isola, T.

    2009-01-01

    We prove the existence of a bijection between the regular and the non-regular operator monotone functions satisfying a certain functional equation. As an application we give a new proof of the operator monotonicity of certain functions related to the Wigner-Yanase-Dyson skew information.......We prove the existence of a bijection between the regular and the non-regular operator monotone functions satisfying a certain functional equation. As an application we give a new proof of the operator monotonicity of certain functions related to the Wigner-Yanase-Dyson skew information....

  3. Relational-Regularized Discriminative Sparse Learning for Alzheimer's Disease Diagnosis.

    Science.gov (United States)

    Lei, Baiying; Yang, Peng; Wang, Tianfu; Chen, Siping; Ni, Dong

    2017-01-16

    Accurate identification and understanding informative feature is important for early Alzheimer's disease (AD) prognosis and diagnosis. In this paper, we propose a novel discriminative sparse learning method with relational regularization to jointly predict the clinical score and classify AD disease stages using multimodal features. Specifically, we apply a discriminative learning technique to expand the class-specific difference and include geometric information for effective feature selection. In addition, two kind of relational information are incorporated to explore the intrinsic relationships among features and training subjects in terms of similarity learning. We map the original feature into the target space to identify the informative and predictive features by sparse learning technique. A unique loss function is designed to include both discriminative learning and relational regularization methods. Experimental results based on a total of 805 subjects [including 226 AD patients, 393 mild cognitive impairment (MCI) subjects, and 186 normal controls (NCs)] from AD neuroimaging initiative database show that the proposed method can obtain a classification accuracy of 94.68% for AD versus NC, 80.32% for MCI versus NC, and 74.58% for progressive MCI versus stable MCI, respectively. In addition, we achieve remarkable performance for the clinical scores prediction and classification label identification, which has efficacy for AD disease diagnosis and prognosis. The algorithm comparison demonstrates the effectiveness of the introduced learning techniques and superiority over the state-of-the-arts methods.

  4. 76 FR 63676 - Final Division of Safety Systems Interim Staff Guidance DSS-ISG-2010-01: Staff Guidance Regarding...

    Science.gov (United States)

    2011-10-13

    ... COMMISSION Final Division of Safety Systems Interim Staff Guidance DSS-ISG- 2010-01: Staff Guidance Regarding... final Division of Safety Systems Interim Staff Guidance, (DSS-ISG) DSS- ISG-2010-01, ``Staff Guidance... guidance to the NRC staff reviewer to address the increased complexity of recent spent fuel pool...

  5. Less is more: regularization perspectives on large scale machine learning

    CERN Document Server

    CERN. Geneva

    2017-01-01

    Deep learning based techniques provide a possible solution at the expanse of theoretical guidance and, especially, of computational requirements. It is then a key challenge for large scale machine learning to devise approaches guaranteed to be accurate and yet computationally efficient. In this talk, we will consider a regularization perspectives on machine learning appealing to classical ideas in linear algebra and inverse problems to scale-up dramatically nonparametric methods such as kernel methods, often dismissed because of prohibitive costs. Our analysis derives optimal theoretical guarantees while providing experimental results at par or out-performing state of the art approaches.

  6. Restrictive metric regularity and generalized differential calculus in Banach spaces

    Directory of Open Access Journals (Sweden)

    Bingwu Wang

    2004-10-01

    Full Text Available We consider nonlinear mappings f:X→Y between Banach spaces and study the notion of restrictive metric regularity of f around some point x¯, that is, metric regularity of f from X into the metric space E=f(X. Some sufficient as well as necessary and sufficient conditions for restrictive metric regularity are obtained, which particularly include an extension of the classical Lyusternik-Graves theorem in the case when f is strictly differentiable at x¯ but its strict derivative ∇f(x¯ is not surjective. We develop applications of the results obtained and some other techniques in variational analysis to generalized differential calculus involving normal cones to nonsmooth and nonconvex sets, coderivatives of set-valued mappings, as well as first-order and second-order subdifferentials of extended real-valued functions.

  7. Graph Regularized Auto-Encoders for Image Representation.

    Science.gov (United States)

    Yiyi Liao; Yue Wang; Yong Liu

    2017-06-01

    Image representation has been intensively explored in the domain of computer vision for its significant influence on the relative tasks such as image clustering and classification. It is valuable to learn a low-dimensional representation of an image which preserves its inherent information from the original image space. At the perspective of manifold learning, this is implemented with the local invariant idea to capture the intrinsic low-dimensional manifold embedded in the high-dimensional input space. Inspired by the recent successes of deep architectures, we propose a local invariant deep nonlinear mapping algorithm, called graph regularized auto-encoder (GAE). With the graph regularization, the proposed method preserves the local connectivity from the original image space to the representation space, while the stacked auto-encoders provide explicit encoding model for fast inference and powerful expressive capacity for complex modeling. Theoretical analysis shows that the graph regularizer penalizes the weighted Frobenius norm of the Jacobian matrix of the encoder mapping, where the weight matrix captures the local property in the input space. Furthermore, the underlying effects on the hidden representation space are revealed, providing insightful explanation to the advantage of the proposed method. Finally, the experimental results on both clustering and classification tasks demonstrate the effectiveness of our GAE as well as the correctness of the proposed theoretical analysis, and it also suggests that GAE is a superior solution to the current deep representation learning techniques comparing with variant auto-encoders and existing local invariant methods.

  8. Shadow of rotating regular black holes

    CERN Document Server

    Abdujabbarov, Ahmadjon; Ahmedov, Bobomurat; Ghosh, Sushant G

    2016-01-01

    We study the shadows cast by the different types of rotating regular black holes viz. Ay\\'on-Beato-Garc\\'ia {(ABG)}, Hayward, and Bardeen. These black holes have in addition to the total mass ($M$) and rotation parameter ($a$), different parameters as electric charge ($Q$), deviation parameter ($g$), and magnetic charge ($g_{*}$), respectively. Interestingly, the size of the shadow is affected by these parameters in addition to the rotation parameter. We found that the radius of the shadow in each case decreases monotonically and the distortion parameter increases when the value of these parameters increase. A comparison with the standard Kerr case is also investigated. We have also studied the influence of the plasma environment around regular black holes to discuss its shadow. The presence of the plasma affects the apparent size of the regular black hole's shadow to be increased due to two effects (i) gravitational redshift of the photons and (ii) radial dependence of plasma density.

  9. Fractional Regularization Term for Variational Image Registration

    Directory of Open Access Journals (Sweden)

    Rafael Verdú-Monedero

    2009-01-01

    Full Text Available Image registration is a widely used task of image analysis with applications in many fields. Its classical formulation and current improvements are given in the spatial domain. In this paper a regularization term based on fractional order derivatives is formulated. This term is defined and implemented in the frequency domain by translating the energy functional into the frequency domain and obtaining the Euler-Lagrange equations which minimize it. The new regularization term leads to a simple formulation and design, being applicable to higher dimensions by using the corresponding multidimensional Fourier transform. The proposed regularization term allows for a real gradual transition from a diffusion registration to a curvature registration which is best suited to some applications and it is not possible in the spatial domain. Results with 3D actual images show the validity of this approach.

  10. Regular non-twisting S-branes

    CERN Document Server

    Obregón, O; Ryan, M P; Obregon, Octavio; Quevedo, Hernando; Ryan, Michael P.

    2004-01-01

    We construct a family of time and angular dependent, regular S-brane solutions which corresponds to a simple analytical continuation of the Zipoy-Voorhees 4-dimensional vacuum spacetime. The solutions are asymptotically flat and turn out to be free of singularities without requiring a twist in space. They can be considered as the simplest non-singular generalization of the singular S0-brane solution. We analyze the properties of a representative of this family of solutions and show that it resembles to some extent the asymptotic properties of the regular Kerr S-brane. The R-symmetry corresponds, however, to the general Lorentzian symmetry. Several generalizations of this regular solution are derived which include a charged S-brane and an additional dilatonic field.

  11. Landweber iterative regularization for nearfield acoustic holography

    Institute of Scientific and Technical Information of China (English)

    BI Chuanxing; CHEN Xinzhao; ZHOU Rong; CHEN Jian

    2006-01-01

    On the basis of the distributed source boundary point method (DSBPM)-based nearfield acoustic holography (NAH), Landweber iterative regularization method is proposed to stabilize the NAH reconstruction process, control the influence of measurement errors on the reconstructed results and ensure the validity of the reconstructed results. And a new method, the auxiliary surface method, is proposed to determine the optimal iterative number for optimizing the regularization effect. Here, the optimal number is determined by minimizing the relative error between the calculated pressure on the auxiliary surface corresponding to each iterative number and the measured pressure. An experiment on a speaker is investigated to demonstrate the high sensitivity of the reconstructed results to measurement errors and to validate the chosen method of the optimal iterative number and the Landweber iterative regularization method for controlling the influence of measurement errors on the reconstructed results.

  12. Robust super-resolution without regularization

    Energy Technology Data Exchange (ETDEWEB)

    Pham, T Q [Canon Information Systems Research Australia, 1 Thomas Holt drive, North Ryde, NSW 2113 (Australia); Vliet, L J v [Quantitative Imaging Group, Department of Imaging Science and Technology, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft (Netherlands); Schutte, K [Electro-Optics Group, TNO Defence, Security and Safety, PO Box 96864, 2509 JG The Hague (Netherlands)

    2008-07-15

    Super-resolution restoration is the problem of restoring a high-resolution scene from multiple degraded low-resolution images under motion. Due to imaging blur and noise, this problem is ill-posed. Additional constraints such as smoothness of the solution (i.e. regularization) is often required to obtain a stable solution. While regularizing the cost function is a standard practice in image restoration, we propose a restoration algorithm that does not require this extra regularization term. The robustness of the algorithm is achieved by a robust error norm that does not response to intensity outliers. With the outliers suppressed, our solution behaves similarly to a maximum-likelihood solution under the presence of Gaussian noise. The effectiveness of our algorithm is demonstrated with super-resolution restoration of real infrared image sequences under severe aliasing and intensity outliers.

  13. Nonlinear electrodynamics and regular black holes

    Science.gov (United States)

    Sajadi, S. N.; Riazi, N.

    2017-03-01

    In this work, an exact regular black hole solution in General Relativity is presented. The source is a nonlinear electromagnetic field with the algebraic structure T00=T11 for the energy-momentum tensor, partially satisfying the weak energy condition but not the strong energy condition. In the weak field limit, the EM field behaves like the Maxwell field. The solution corresponds to a charged black hole with q≤0.77 m. The metric, the curvature invariants, and the electric field are regular everywhere. The BH is stable against small perturbations of spacetime and using the Weinhold metric, geometrothermodynamical stability has been investigated. Finally we investigate the idea that the observable universe lives inside a regular black hole. We argue that this picture might provide a viable description of universe.

  14. Regularization and Migration Policy in Europe

    Directory of Open Access Journals (Sweden)

    Philippe de Bruycker

    2001-05-01

    Full Text Available The following pages present, in a general way, the contents of Regularization of illegal immigrants in the European Union, which includes a comparative synthesis and statistical information for each of the eight countries involved; a description of actions since the beginning of the year 2000; and a systematic analysis of the different categories of foreigners, the types of regularization carried out, and the rules that have governed these actions.In relation to regularization, the author considers the political coherence of the actions taken by the member states as well as how they relate to two ever more crucial aspects of immigration policy –the integration of legal resident immigrants and the fight againstillegal immigration in the context of a control of migratory flows.

  15. Inverse problems: Fuzzy representation of uncertainty generates a regularization

    Science.gov (United States)

    Kreinovich, V.; Chang, Ching-Chuang; Reznik, L.; Solopchenko, G. N.

    1992-01-01

    In many applied problems (geophysics, medicine, and astronomy) we cannot directly measure the values x(t) of the desired physical quantity x in different moments of time, so we measure some related quantity y(t), and then we try to reconstruct the desired values x(t). This problem is often ill-posed in the sense that two essentially different functions x(t) are consistent with the same measurement results. So, in order to get a reasonable reconstruction, we must have some additional prior information about the desired function x(t). Methods that use this information to choose x(t) from the set of all possible solutions are called regularization methods. In some cases, we know the statistical characteristics both of x(t) and of the measurement errors, so we can apply statistical filtering methods (well-developed since the invention of a Wiener filter). In some situations, we know the properties of the desired process, e.g., we know that the derivative of x(t) is limited by some number delta, etc. In this case, we can apply standard regularization techniques (e.g., Tikhonov's regularization). In many cases, however, we have only uncertain knowledge about the values of x(t), about the rate with which the values of x(t) can change, and about the measurement errors. In these cases, usually one of the existing regularization methods is applied. There exist several heuristics that choose such a method. The problem with these heuristics is that they often lead to choosing different methods, and these methods lead to different functions x(t). Therefore, the results x(t) of applying these heuristic methods are often unreliable. We show that if we use fuzzy logic to describe this uncertainty, then we automatically arrive at a unique regularization method, whose parameters are uniquely determined by the experts knowledge. Although we start with the fuzzy description, but the resulting regularization turns out to be quite crisp.

  16. Partial Regularity for Nonlinear Subelliptic Systems with Dini Continuous Coefficients in Heisenberg Groups

    Directory of Open Access Journals (Sweden)

    Jialin Wang

    2013-01-01

    Full Text Available This paper is concerned with partial regularity to nonlinear subelliptic systems with Dini continuous coefficients under quadratic controllable growth conditions in the Heisenberg group ℍn. Based on a generalization of the technique of -harmonic approximation introduced by Duzaar and Steffen, partial regularity to the sub-elliptic system is established in the Heisenberg group. Our result is optimal in the sense that in the case of Hölder continuous coefficients we establish the optimal Hölder exponent for the horizontal gradients of the weak solution on its regular set.

  17. Image reconstruction based on L1 regularization and projection methods for electrical impedance tomography.

    Science.gov (United States)

    Wang, Qi; Wang, Huaxiang; Zhang, Ronghua; Wang, Jinhai; Zheng, Yu; Cui, Ziqiang; Yang, Chengyi

    2012-10-01

    Electrical impedance tomography (EIT) is a technique for reconstructing the conductivity distribution by injecting currents at the boundary of a subject and measuring the resulting changes in voltage. Image reconstruction in EIT is a nonlinear and ill-posed inverse problem. The Tikhonov method with L(2) regularization is always used to solve the EIT problem. However, the L(2) method always smoothes the sharp changes or discontinue areas of the reconstruction. Image reconstruction using the L(1) regularization allows addressing this difficulty. In this paper, a sum of absolute values is substituted for the sum of squares used in the L(2) regularization to form the L(1) regularization, the solution is obtained by the barrier method. However, the L(1) method often involves repeatedly solving large-dimensional matrix equations, which are computationally expensive. In this paper, the projection method is combined with the L(1) regularization method to reduce the computational cost. The L(1) problem is mainly solved in the coarse subspace. This paper also discusses the strategies of choosing parameters. Both simulation and experimental results of the L(1) regularization method were compared with the L(2) regularization method, indicating that the L(1) regularization method can improve the quality of image reconstruction and tolerate a relatively high level of noise in the measured voltages. Furthermore, the projected L(1) method can also effectively reduce the computational time without affecting the quality of reconstructed images.

  18. Academic Staff Development and Output in State Universities in ...

    African Journals Online (AJOL)

    Academic Staff Development and Output in State Universities in South-South Nigeria. ... AFRICAN JOURNALS ONLINE (AJOL) · Journals · Advanced Search ... This study examines staff development and the output of academic staff in the ...

  19. Outbreak of Mysterious Illness Among Hospital Staff

    DEFF Research Database (Denmark)

    Jacobsen, Peter; Ebbehøj, Niels Erik

    2016-01-01

    BACKGROUND: Hospitals are rarely reported as settings for mass psychogenic illness (MPI). The present report scrutinizes an outbreak of probable MPI among hospital staff, with medical intervention reinforcing the course of the illness. CASE REPORT: Four of seven staff members in an emergency depa....... Outbreaks of illness in a group of symptomatic victims without indication of significant physical disease should be managed by observation and limited intervention.......BACKGROUND: Hospitals are rarely reported as settings for mass psychogenic illness (MPI). The present report scrutinizes an outbreak of probable MPI among hospital staff, with medical intervention reinforcing the course of the illness. CASE REPORT: Four of seven staff members in an emergency...... the following 9 days, 14 possible poisoning victims were identified, 6 of whom were transferred for HBO. After hospital stays with repeated HBO treatment and examinations without identification of significant physical disease, the majority of the 10 HBO-treated victims remained symptomatic, some on prolonged...

  20. Means of Staff Number Reduction and Outplacement

    National Research Council Canada - National Science Library

    H. Urbancová

    2014-01-01

    .... The objective is to present the ways of staff number reduction in Czech organizations and outplacement for the laid-off workers and a partial objective is to compare the results with those in the Slovak Republic...

  1. Staff Development: The Problems of Motivation.

    Science.gov (United States)

    O'Connor, Andrea B.

    1982-01-01

    Inservice educators must incorporate humanistic approaches in their offerings. Nursing service administrators should delegate to staff development personnel only those activities that are clearly educational in nature. (Author/JOW)

  2. Combinatorial techniques

    CERN Document Server

    Sane, Sharad S

    2013-01-01

    This is a basic text on combinatorics that deals with all the three aspects of the discipline: tricks, techniques and theory, and attempts to blend them. The book has several distinctive features. Probability and random variables with their interconnections to permutations are discussed. The theme of parity has been specially included and it covers applications ranging from solving the Nim game to the quadratic reciprocity law. Chapters related to geometry include triangulations and Sperner's theorem, classification of regular polytopes, tilings and an introduction to the Eulcidean Ramsey theory. Material on group actions covers Sylow theory, automorphism groups and a classification of finite subgroups of orthogonal groups. All chapters have a large number of exercises with varying degrees of difficulty, ranging from material suitable for Mathematical Olympiads to research.

  3. Width Distributions for Convex Regular Polyhedra

    CERN Document Server

    Finch, Steven R

    2011-01-01

    The mean width is a measure on three-dimensional convex bodies that enjoys equal status with volume and surface area [Rota]. As the phrase suggests, it is the mean of a probability density f. We verify formulas for mean widths of the regular tetrahedron and the cube. Higher-order moments of f_tetra and f_cube have not been examined until now. Assume that each polyhedron has edges of unit length. We deduce that the mean square width of the regular tetrahedron is 1/3+(3+sqrt(3))/(3*pi) and the mean square width of the cube is 1+4/pi.

  4. Stability Analysis for Regularized Least Squares Regression

    OpenAIRE

    Rudin, Cynthia

    2005-01-01

    We discuss stability for a class of learning algorithms with respect to noisy labels. The algorithms we consider are for regression, and they involve the minimization of regularized risk functionals, such as L(f) := 1/N sum_i (f(x_i)-y_i)^2+ lambda ||f||_H^2. We shall call the algorithm `stable' if, when y_i is a noisy version of f*(x_i) for some function f* in H, the output of the algorithm converges to f* as the regularization term and noise simultaneously vanish. We consider two flavors of...

  5. Interaction of Regular and Chaotic States

    CERN Document Server

    De Pace, A; Weidenmüller, H A

    2006-01-01

    Modelling the chaotic states in terms of the Gaussian Orthogonal Ensemble of random matrices (GOE), we investigate the interaction of the GOE with regular bound states. The eigenvalues of the latter may or may not be embedded in the GOE spectrum. We derive a generalized form of the Pastur equation for the average Green's function. We use that equation to study the average and the variance of the shift of the regular states, their spreading width, and the deformation of the GOE spectrum non-perturbatively. We compare our results with various perturbative approaches.

  6. Regular transport dynamics produce chaotic travel times.

    Science.gov (United States)

    Villalobos, Jorge; Muñoz, Víctor; Rogan, José; Zarama, Roberto; Johnson, Neil F; Toledo, Benjamín; Valdivia, Juan Alejandro

    2014-06-01

    In the hope of making passenger travel times shorter and more reliable, many cities are introducing dedicated bus lanes (e.g., Bogota, London, Miami). Here we show that chaotic travel times are actually a natural consequence of individual bus function, and hence of public transport systems more generally, i.e., chaotic dynamics emerge even when the route is empty and straight, stops and lights are equidistant and regular, and loading times are negligible. More generally, our findings provide a novel example of chaotic dynamics emerging from a single object following Newton's laws of motion in a regularized one-dimensional system.

  7. No finite $5$-regular matchstick graph exists

    OpenAIRE

    2014-01-01

    A graph $G=(V,E)$ is called a unit-distance graph in the plane if there is an injective embedding of $V$ in the plane such that every pair of adjacent vertices are at unit distance apart. If additionally the corresponding edges are non-crossing and all vertices have the same degree $r$ we talk of a regular matchstick graph. Due to Euler's polyhedron formula we have $r\\le 5$. The smallest known $4$-regular matchstick graph is the so called Harborth graph consisting of $52$ vertices. In this ar...

  8. On d-Walk Regular Graphs

    OpenAIRE

    Estrada, Ernesto; de la Pena, Jose A.

    2013-01-01

    Let G be a graph with set of vertices 1,...,n and adjacency matrix A of size nxn. Let d(i,j)=d, we say that f_d:N->N is a d-function on G if for every pair of vertices i,j and k>=d, we have a_ij^(k)=f_d(k). If this function f_d exists on G we say that G is d-walk regular. We prove that G is d-walk regular if and only if for every pair of vertices i,j at distance

  9. Keeping health staff healthy: evaluation of a workplace initiative to reduce morbidity and mortality from HIV/AIDS in Malawi

    Directory of Open Access Journals (Sweden)

    Bemelmans Marielle

    2011-01-01

    Full Text Available Abstract Background In Malawi, the dramatic shortage of human resources for health is negatively impacted by HIV-related morbidity and mortality among health workers and their relatives. Many staff find it difficult to access HIV care through regular channels due to fear of stigma and discrimination. In 2006, two workplace initiatives were implemented in Thyolo District: a clinic at the district hospital dedicated to all district health staff and their first-degree relatives, providing medical services, including HIV care; and a support group for HIV-positive staff. Methods Using routine programme data, we evaluated the following outcomes up to the end of 2009: uptake and outcome of HIV testing and counselling among health staff and their dependents; uptake and outcomes of antiretroviral therapy (ART among health staff; and membership and activities of the support group. In addition, we included information from staff interviews and a job satisfaction survey to describe health workers' opinions of the initiatives. Results Almost two-thirds (91 of 144, 63% of health workers and their dependents undergoing HIV testing and counselling at the staff clinic tested HIV positive. Sixty-four health workers had accessed ART through the staff clinic, approximately the number of health workers estimated to be in need of ART. Of these, 60 had joined the support group. Cumulative ART outcomes were satisfactory, with more than 90% alive on treatment as of June 2009 (the end of the study observation period. The availability, confidentiality and quality of care in the staff clinic were considered adequate by beneficiaries. Conclusions Staff clinic and support group services successfully provided care and support to HIV-positive health workers. Similar initiatives should be considered in other settings with a high HIV prevalence.

  10. Staff rosters for 1979: environmental programs

    Energy Technology Data Exchange (ETDEWEB)

    1979-12-01

    The roster of the scientific and professional staffs of the Environmental Programs of the Department of Energy and Environment has been compiled as of December 1979. Staff members have been listed according to their organizational units, i.e., the Atmospheric Sciences Division, the Environmental Chemistry Division, the Oceanographic Sciences Division, and the Land and Freshwater Environmental Sciences Group. Educational background, research interests, professional activities, summary of experience at BNL, and selected publications have been included for each member listed.

  11. Local regularity analysis of strata heterogeneities from sonic logs

    Directory of Open Access Journals (Sweden)

    S. Gaci

    2010-09-01

    Full Text Available Borehole logs provide geological information about the rocks crossed by the wells. Several properties of rocks can be interpreted in terms of lithology, type and quantity of the fluid filling the pores and fractures.

    Here, the logs are assumed to be nonhomogeneous Brownian motions (nhBms which are generalized fractional Brownian motions (fBms indexed by depth-dependent Hurst parameters H(z. Three techniques, the local wavelet approach (LWA, the average-local wavelet approach (ALWA, and Peltier Algorithm (PA, are suggested to estimate the Hurst functions (or the regularity profiles from the logs.

    First, two synthetic sonic logs with different parameters, shaped by the successive random additions (SRA algorithm, are used to demonstrate the potential of the proposed methods. The obtained Hurst functions are close to the theoretical Hurst functions. Besides, the transitions between the modeled layers are marked by Hurst values discontinuities. It is also shown that PA leads to the best Hurst value estimations.

    Second, we investigate the multifractional property of sonic logs data recorded at two scientific deep boreholes: the pilot hole VB and the ultra deep main hole HB, drilled for the German Continental Deep Drilling Program (KTB. All the regularity profiles independently obtained for the logs provide a clear correlation with lithology, and from each regularity profile, we derive a similar segmentation in terms of lithological units. The lithological discontinuities (strata' bounds and faults contacts are located at the local extrema of the Hurst functions. Moreover, the regularity profiles are compared with the KTB estimated porosity logs, showing a significant relation between the local extrema of the Hurst functions and the fluid-filled fractures. The Hurst function may then constitute a tool to characterize underground heterogeneities.

  12. Spatially adaptive regularized iterative high-resolution image reconstruction algorithm

    Science.gov (United States)

    Lim, Won Bae; Park, Min K.; Kang, Moon Gi

    2000-12-01

    High resolution images are often required in applications such as remote sensing, frame freeze in video, military and medical imaging. Digital image sensor arrays, which are used for image acquisition in many imaging systems, are not dense enough to prevent aliasing, so the acquired images will be degraded by aliasing effects. To prevent aliasing without loss of resolution, a dense detector array is required. But it may be very costly or unavailable, thus, many imaging systems are designed to allow some level of aliasing during image acquisition. The purpose of our work is to reconstruct an unaliased high resolution image from the acquired aliased image sequence. In this paper, we propose a spatially adaptive regularized iterative high resolution image reconstruction algorithm for blurred, noisy and down-sampled image sequences. The proposed approach is based on a Constrained Least Squares (CLS) high resolution reconstruction algorithm, with spatially adaptive regularization operators and parameters. These regularization terms are shown to improve the reconstructed image quality by forcing smoothness, while preserving edges in the reconstructed high resolution image. Accurate sub-pixel motion registration is the key of the success of the high resolution image reconstruction algorithm. However, sub-pixel motion registration may have some level of registration error. Therefore, a reconstruction algorithm which is robust against the registration error is required. The registration algorithm uses a gradient based sub-pixel motion estimator which provides shift information for each of the recorded frames. The proposed algorithm is based on a technique of high resolution image reconstruction, and it solves spatially adaptive regularized constrained least square minimization functionals. In this paper, we show that the reconstruction algorithm gives dramatic improvements in the resolution of the reconstructed image and is effective in handling the aliased information. The

  13. Managerial instrument for didactic staff structure optimization for Distance Learning

    Directory of Open Access Journals (Sweden)

    Gavrus Cristina

    2017-01-01

    Full Text Available Distance learning is a modern system for providing educational services and is relatively new in Romania, if related to the date of its emergence in Europe. More and more active working people are interested in this form of education, paying of course a special attention to its quality. It is quite difficult to appraise the quality of educational programs but several instruments and criteria have been developed over time. The present paper proposes an original mathematical instrument that is aiming at human resources, this type of resources being considered extremely important in case of providing educational service. The number of teachers is crucial for a distance learning program study, because the didactic staff must cover a number of didactic classes that take place on weekends. Concretely, this paper is focused on finding an algorithm that allows the didactic staff structure optimization. For accomplishing this objective, two managerial instruments were use. One of them is mathematical linear programing technique, that develops a mathematical model for didactic staff structure and the other one is WinQSB software package that tests the mathematical model.

  14. The power behind empowerment for staff nurses: using Foucault's concepts.

    Science.gov (United States)

    Udod, Sonia A

    2008-01-01

    The concept of staff nurse empowerment is often evoked in dialogue concerning the nature of nurses' practice in improving their work environments. Nurse empowerment has been the subject of vigorous discussion in healthcare settings, and has been researched largely through an organizational perspective. In this paper, nurse empowerment is analyzed by drawing upon a critical science approach as an alternative theoretical lens. Power is integral to empowerment, and occurs in the context of relations of power. The author uses the ideas of Michel Foucault to address the different ways in which power relations shape nurses' experiences in the workplace. Foucault conceptualizes power as a form of power that envelops staff nurses and nurse managers and, more specifically, as a set of disciplinary techniques. Rather than discussing power solely as a repressive force, Foucault identifies the productive aspects of power. His analysis of where power resides suggests a thought-provoking approach to staff nurse empowerment that has the potential to change nurses' practice through points of resistance, and thus has implications for improving the quality of nurses' work life.

  15. Concussion knowledge and management practices among coaches and medical staff in Irish professional rugby teams.

    Science.gov (United States)

    Fraas, M R; Coughlan, G F; Hart, E C; McCarthy, C

    2015-06-01

    Self-reported concussion rates among U-20 and elite rugby union players in Ireland are 45-48%. Half of these injuries go unreported. Accurate knowledge of concussion signs and symptoms and appropriate management practices among coaches and medical staff is important to improve the welfare of players. Examine concussion knowledge among coaches, and management techniques among medical staff of professional Irish rugby teams. Surveys were administered to 11 coaches and 12 medical staff at the end of the 2010-2011 season. Coaches demonstrated an accurate knowledge of concussion with a good understanding of concussion-related symptoms. Medical staff reported using a variety of methods for assessing concussion and making return-to-play decisions. Reliance on subjective clinical methods was evident, with less reliance on objective postural stability performance. Overall, the coaches in this investigation have accurate knowledge of concussion and medical staff use effective techniques for managing this injury. On-going education is needed to assist coaches in identifying concussion signs and symptoms. It is recommended that medical staff increase their reliance on objective methods for assessment and return-to-play decision making.

  16. Dynamic stabilization of regular linear systems

    NARCIS (Netherlands)

    Weiss, G; Curtain, RF

    We consider a general class of infinite-dimensional linear systems, called regular linear systems, for which convenient representations are known to exist both in time and in frequency domain, For this class of systems, we investigate the concepts of stabilizability and detectability, in particular,

  17. Regular and context-free nominal traces

    DEFF Research Database (Denmark)

    Mezzetti, Gianluca

    2016-01-01

    Two kinds of automata are presented, for recognising new classes of regular and context-free nominal languages. We compare their expressive power with analogous proposals in the literature, showing that they express novel classes of languages. Although many properties of classical languages hold ...

  18. Neural Classifier Construction using Regularization, Pruning

    DEFF Research Database (Denmark)

    Hintz-Madsen, Mads; Hansen, Lars Kai; Larsen, Jan;

    1998-01-01

    In this paper we propose a method for construction of feed-forward neural classifiers based on regularization and adaptive architectures. Using a penalized maximum likelihood scheme, we derive a modified form of the entropic error measure and an algebraic estimate of the test error. In conjunction...

  19. Deconvolution and Regularization with Toeplitz Matrices

    DEFF Research Database (Denmark)

    Hansen, Per Christian

    2002-01-01

    of these discretized deconvolution problems, with emphasis on methods that take the special structure of the matrix into account. Wherever possible, analogies to classical DFT-based deconvolution problems are drawn. Among other things, we present direct methods for regularization with Toeplitz matrices, and we show...

  20. The moduli space of regular stable maps

    CERN Document Server

    Robbin, Joel; Salamon, Dietmar; 10.1007/s00209-007-0237-x

    2012-01-01

    The moduli space of regular stable maps with values in a complex manifold admits naturally the structure of a complex orbifold. Our proof uses the methods of differential geometry rather than algebraic geometry. It is based on Hardy decompositions and Fredholm intersection theory in the loop space of the target manifold.

  1. Regular conformal system for Einstein equations

    Energy Technology Data Exchange (ETDEWEB)

    Choquet-Bruhat, Y.; Novello, M.

    1987-06-21

    We give a system of partial differential equations satisfied by a metric g conformal to an Einstein metric and by the conformal factor ..omega.., regular system in the sense that it does not contain negative powers of ..omega... We use the ideas of Friedrich but we obtain here a hyperbolic system in the sense of Leray, by a different method.

  2. Optimal Regularizing Effect for Scalar Conservation Laws

    CERN Document Server

    Golse, François

    2011-01-01

    We investigate the regularity of bounded weak solutions of scalar conservation laws with uniformly convex flux in space dimension one, satisfying an entropy condition with entropy production term that is a signed Radon measure. The proof is based on the kinetic formulation of scalar conservation laws and on an interaction estimate in physical space.

  3. Bayesian regularization of diffusion tensor images

    DEFF Research Database (Denmark)

    Frandsen, Jesper; Hobolth, Asger; Østergaard, Leif;

    2007-01-01

    several directions. The measured diffusion coefficients and thereby the diffusion tensors are subject to noise, leading to possibly flawed representations of the three dimensional fibre bundles. In this paper we develop a Bayesian procedure for regularizing the diffusion tensor field, fully utilizing...

  4. Regularity of rotational travelling water waves.

    Science.gov (United States)

    Escher, Joachim

    2012-04-13

    Several recent results on the regularity of streamlines beneath a rotational travelling wave, along with the wave profile itself, will be discussed. The survey includes the classical water wave problem in both finite and infinite depth, capillary waves and solitary waves as well. A common assumption in all models to be discussed is the absence of stagnation points.

  5. Contour Propagation With Riemannian Elasticity Regularization

    DEFF Research Database (Denmark)

    Bjerre, Troels; Hansen, Mads Fogtmann; Sapru, W.;

    2011-01-01

    the planning CT onto the rescans and correcting to reflect actual anatomical changes. For deformable registration, a free-form, multi-level, B-spline deformation model with Riemannian elasticity, penalizing non-rigid local deformations, and volumetric changes, was used. Regularization parameters was defined...

  6. NOTE ON REGULAR D-OPTIMAL MATRICES

    Institute of Scientific and Technical Information of China (English)

    李乔良

    2003-01-01

    Let A be aj ×d (0,1) matrix. It is known that ifj = 2k-1is odd, then det(AAT) ≤(j+1)((j+1)d/4j)j; ifj is even, then det(AAT) ≤ (j+1)((j+2)d/4(j+1))j. A is called a regularD-optimal matrix if it satisfies the equality of the above bounds. In this note, it is proved thatifj = 2k - 1 is odd, then A is a regular D-optimal matrix if and only if A is the adjacent matrixof a (2k - 1, k, (j + 1)d/4j)-BIBD; if j = 2k is even, then A is a regular D-optimal matrix ifand only if A can be obtained from the adjacent matrix B of a (2k + 1, k + 1, (j + 2)d/4(j + 1))-BIBD by deleting any one row from B. Three 21 × 42 regular D-optimal matrices, which wereunknown in [11], are also provided.

  7. A Note on Left Regular Semiring

    Directory of Open Access Journals (Sweden)

    N. Sulochana

    2016-08-01

    Full Text Available In this paper we have focused on the additive and multiplicative identity „e‟ and determine the additive and multiplicative semigroups. Here we established that, A semiring S in which (S, + and (S, • are left singular semigroups, then S is a left regular semiring. We have framed an example for this proposition by considering a two element set

  8. Tikhonov Regularization and Total Least Squares

    DEFF Research Database (Denmark)

    Golub, G. H.; Hansen, Per Christian; O'Leary, D. P.

    2000-01-01

    formulation involves a least squares problem, can be recast in a total least squares formulation suited for problems in which both the coefficient matrix and the right-hand side are known only approximately. We analyze the regularizing properties of this method and demonstrate by a numerical example that...

  9. Creativity Workshops in the Regular Classroom.

    Science.gov (United States)

    Mildrum, Nancy King

    2000-01-01

    This article describes implementation of a creativity curriculum, Ten Lessons in Creativity, with gifted and typical students in elementary and middle school settings. It discusses creativity instruction as a bridge between gifted and regular education, ways that creativity workshops affirm the highly creative child, creativity and self-esteem,…

  10. Regularization of turbulence - a comprehensive modeling approach

    Science.gov (United States)

    Geurts, B. J.

    2011-12-01

    Turbulence readily arises in numerous flows in nature and technology. The large number of degrees of freedom of turbulence poses serious challenges to numerical approaches aimed at simulating and controlling such flows. While the Navier-Stokes equations are commonly accepted to precisely describe fluid turbulence, alternative coarsened descriptions need to be developed to cope with the wide range of length and time scales. These coarsened descriptions are known as large-eddy simulations in which one aims to capture only the primary features of a flow, at considerably reduced computational effort. Such coarsening introduces a closure problem that requires additional phenomenological modeling. A systematic approach to the closure problem, know as regularization modeling, will be reviewed. Its application to multiphase turbulent will be illustrated in which a basic regularization principle is enforced to physically consistently approximate momentum and scalar transport. Examples of Leray and LANS-alpha regularization are discussed in some detail, as are compatible numerical strategies. We illustrate regularization modeling to turbulence under the influence of rotation and buoyancy and investigate the accuracy with which particle-laden flow can be represented. A discussion of the numerical and modeling errors incurred will be given on the basis of homogeneous isotropic turbulence.

  11. Coprime factorization for regular linear systems

    NARCIS (Netherlands)

    Curtain, R; Weiss, G; Weiss, M

    1996-01-01

    Mild sufficient conditions are given for the existence of a doubly coprime factorization of the transfer function of a regular linear system, as well as formulae for such a factorization. The results are illustrated by two examples of delay systems, one of which has infinitely many unstable poles. C

  12. Dynamic stabilization of regular linear systems

    NARCIS (Netherlands)

    Weiss, G; Curtain, RF

    1997-01-01

    We consider a general class of infinite-dimensional linear systems, called regular linear systems, for which convenient representations are known to exist both in time and in frequency domain, For this class of systems, we investigate the concepts of stabilizability and detectability, in particular,

  13. Annotation of regular polysemy and underspecification

    DEFF Research Database (Denmark)

    Martínez Alonso, Héctor; Pedersen, Bolette Sandford; Bel, Núria

    2013-01-01

    We present the result of an annotation task on regular polysemy for a series of seman- tic classes or dot types in English, Dan- ish and Spanish. This article describes the annotation process, the results in terms of inter-encoder agreement, and the sense distributions obtained with two methods...

  14. Strategies of Teachers in the Regular Classroom

    Science.gov (United States)

    De Leeuw, Renske Ria; De Boer, Anke Aaltje

    2016-01-01

    It is known that regular schoolteachers have difficulties in educating students with social, emotional and behavioral difficulties (SEBD), mainly because of their disruptive behavior. In order to manage the disruptive behavior of students with SEBD many advices and strategies are provided in educational literature. However, very little is known…

  15. Strategies of teachers in the regular classroom

    NARCIS (Netherlands)

    de Leeuw, Renske Ria; de Boer, Anke Aaltje

    2016-01-01

    It is known that regular schoolteachers have difficulties in educating students with social, emotional and behavioral difficulties (SEBD), mainly because of their disruptive behavior. In order to manage the disruptive behavior of students with SEBD many advices and strategies are provided in educati

  16. On the regularity in some variational problems

    Science.gov (United States)

    Ragusa, Maria Alessandra; Tachikawa, Atsushi

    2017-01-01

    Our main goal is the study some regularity results where are considered estimates in Morrey spaces for the derivatives of local minimizers of variational integrals of the form 𝒜 (u ,Ω )= ∫Ω F (x ,u ,D u ) dx where Ω is a bounded domain in ℝm and the integrand F have some different forms.

  17. Regular-fat dairy and human health

    DEFF Research Database (Denmark)

    Astrup, Arne; Bradley, Beth H Rice; Brenna, J Thomas;

    2016-01-01

    to disseminate, explore and discuss the state of the science on the relationship between regular fat dairy products and health, symposia were programmed by dairy industry organizations in Europe and North America at The Eurofed Lipids Congress (2014) in France, The Dairy Nutrition Annual Symposium (2014...

  18. Regular Submanifolds in Conformal Space Qnp

    Institute of Scientific and Technical Information of China (English)

    Changxiong NIE; Chuanxi WU

    2012-01-01

    The authors study the regular submanifolds in the conformal space Qnp and introduce the submanifold theory in the conformal space Qnp.The first variation formula of the Willmore volume functional of pseudo-Riemannian submanifolds in the conformal space Qnp is given.Finally,the conformal isotropic submanifolds in the conformal space Qnp are classified.

  19. On the regularization procedure in classical electrodynamics

    CERN Document Server

    Yaremko, Yu

    2003-01-01

    We consider the self-action problem in classical electrodynamics. A strict geometrical sense of commonly used renormalization of mass is made. A regularization procedure is proposed which relies on energy-momentum and angular momentum balance equations. We correct the expression for angular momentum tensor obtained by us in a previous paper (2002 J. Phys. A: Math. Gen. 35 831).

  20. The canonical controller and its regularity

    NARCIS (Netherlands)

    Willems, Jan C.; Belur, Madhu N.; Anak Agung Julius, A.A.J.; Trentelman, Harry L.

    2003-01-01

    This paper deals with properties of canonical controllers. We first specify the behavior that they implement. It follows that a canonical controller implements the desired controlled behavior if and only if the desired behavior is implementable. We subsequently investigate the regularity of the cont

  1. Stabilization, Pole Placement, and Regular Implementability

    NARCIS (Netherlands)

    Belur, Madhu N.; Trentelman, H.L.

    2002-01-01

    In this paper, we study control by interconnection of linear differential systems. We give necessary and sufficient conditions for regular implementability of a given linear differential system. We formulate the problems of stabilization and pole placement as problems of finding a suitable, regularl

  2. Generalisation of Regular and Irregular Morphological Patterns.

    Science.gov (United States)

    Prasada, Sandeep; and Pinker, Steven

    1993-01-01

    When it comes to explaining English verbs' patterns of regular and irregular generalization, single-network theories have difficulty with the former, rule-only theories with the latter process. Linguistic and psycholinguistic evidence, based on observation during experiments and simulations in morphological pattern generation, independently call…

  3. The Impact of Staff Turnover and Staff Density on Treatment Quality in a Psychiatric Clinic

    Science.gov (United States)

    Brandt, Wolfram A.; Bielitz, Christoph J.; Georgi, Alexander

    2016-01-01

    Intuition suggests that improving stability of the health workforce brings benefits to staff, the organization and, most importantly, the patients. Unfortunately, there is limited research available to support this, and how health workforce stability can contribute to reduced costs and better treatment outcomes. To help to rectify this situation, we investigated the effects of staff turnover and staff density (staff members per patient) on the treatment outcome of inpatients in a psychiatric clinic. Our data come from the standard assessment of 1429 patients who sought treatment in our clinic from January 2011 to August 2013. Correlation analysis shows no significant effect of raw staff turnover (the total number of psychiatrists, physicians and psychologists starting or quitting work per month) on treatment quality. However, we do find two significant beneficial effects: first, a higher staff consistency (time without staff turnover) and second, a higher staff density lead to an improvement of treatment quality. Our findings underline the dire need for an extended effort to achieve optimal staff retention, both to improve patient’s outcomes and to reduce health expenses. PMID:27065925

  4. Remarks on the improved regularity criterion for the 2D Euler-Boussinesq equations with supercritical dissipation

    Science.gov (United States)

    Ye, Zhuan

    2016-12-01

    This paper is devoted to the investigation of the regularity criterion to the two-dimensional (2D) Euler-Boussinesq equations with supercritical dissipation. By making use of the Littlewood-Paley technique, we provide an improved regularity criterion involving the temperature at the scaling invariant level, which improves the previous results.

  5. Work Integration of People with Disabilities in the Regular Labour Market: What Can We Do to Improve These Processes?

    Science.gov (United States)

    Vila, Montserrat; Pallisera, Maria; Fullana, Judit

    2007-01-01

    Background: It is important to ensure that regular processes of labour market integration are available for all citizens. Method: Thematic content analysis techniques, using semi-structured group interviews, were used to identify the principal elements contributing to the processes of integrating people with disabilities into the regular labour…

  6. Regularity theory for mean-field game systems

    CERN Document Server

    Gomes, Diogo A; Voskanyan, Vardan

    2016-01-01

    Beginning with a concise introduction to the theory of mean-field games (MFGs), this book presents the key elements of the regularity theory for MFGs. It then introduces a series of techniques for well-posedness in the context of mean-field problems, including stationary and time-dependent MFGs, subquadratic and superquadratic MFG formulations, and distinct classes of mean-field couplings. It also explores stationary and time-dependent MFGs through a series of a-priori estimates for solutions of the Hamilton-Jacobi and Fokker-Planck equation. It shows sophisticated a-priori systems derived using a range of analytical techniques, and builds on previous results to explain classical solutions. The final chapter discusses the potential applications, models and natural extensions of MFGs. As MFGs connect common problems in pure mathematics, engineering, economics and data management, this book is a valuable resource for researchers and graduate students in these fields.

  7. Regularity Theory for Mean-Field Game Systems

    KAUST Repository

    Gomes, Diogo A.

    2016-09-14

    Beginning with a concise introduction to the theory of mean-field games (MFGs), this book presents the key elements of the regularity theory for MFGs. It then introduces a series of techniques for well-posedness in the context of mean-field problems, including stationary and time-dependent MFGs, subquadratic and superquadratic MFG formulations, and distinct classes of mean-field couplings. It also explores stationary and time-dependent MFGs through a series of a-priori estimates for solutions of the Hamilton-Jacobi and Fokker-Planck equation. It shows sophisticated a-priori systems derived using a range of analytical techniques, and builds on previous results to explain classical solutions. The final chapter discusses the potential applications, models and natural extensions of MFGs. As MFGs connect common problems in pure mathematics, engineering, economics and data management, this book is a valuable resource for researchers and graduate students in these fields.

  8. A novel combined regularization algorithm of total variation and Tikhonov regularization for open electrical impedance tomography.

    Science.gov (United States)

    Liu, Jinzhen; Ling, Lin; Li, Gang

    2013-07-01

    A Tikhonov regularization method in the inverse problem of electrical impedance tomography (EIT) often results in a smooth distribution reconstruction, with which we can barely make a clear separation between the inclusions and background. The recently popular total variation (TV)regularization method including the lagged diffusivity (LD) method can sharpen the edges, and is robust to noise in a small convergence region. Therefore, in this paper, we propose a novel regularization method combining the Tikhonov and LD regularization methods. Firstly, we clarify the implementation details of the Tikhonov, LD and combined methods in two-dimensional open EIT by performing the current injection and voltage measurement on one boundary of the imaging object. Next, we introduce a weighted parameter to the Tikhonov regularization method aiming to explore the effect of the weighted parameter on the resolution and quality of reconstruction images with the inclusion at different depths. Then, we analyze the performance of these algorithms with noisy data. Finally, we evaluate the effect of the current injection pattern on reconstruction quality and propose a modified current injection pattern.The results indicate that the combined regularization algorithm with stable convergence is able to improve the reconstruction quality with sharp contrast and more robust to noise in comparison to the Tikhonov and LD regularization methods solely. In addition, the results show that the current injection pattern with a bigger driver angle leads to a better reconstruction quality.

  9. The regular representation and regular covariant representation of crossed products of Woronowicz C*-algebras

    Institute of Scientific and Technical Information of China (English)

    ZHANG; Xiaoxia; GUO; Maozheng

    2005-01-01

    In this paper, it is shown that the regular representation and regular covariant representation of the crossed products A×α G correspond to the twisted multiplicative unitary operators, where A is a Woronowicz C*-algebra acted upon by a discrete group G. Meanwhile, it is also shown that the regular covariant C*-algebra is the Woronowicz C*-algebra which corresponds to a multiplicative unitary. Finally, an explicit description of the multiplicative unitary operator for C(SUq(2))×α Z is given in terms of those of the Woronowicz C*-algebra C(SUq(2)) and the discrete group G.

  10. Obstetrical staff nurses experiences of clinical learning.

    Science.gov (United States)

    Veltri, Linda M

    2015-01-01

    The clinical learning experience is used in nursing programs of study worldwide to prepare nurses for professional practice. This study's purpose was to use Naturalistic Inquiry to understand the experiences of staff nurses in an obstetrical unit with undergraduate nursing students present for clinical learning. A convenience sample of 12 staff nurses, employed on a Family Birth Center, participated in semi-structured interviews. The constant comparative method as modified by Lincoln and Guba was used to analyze data. Five themes related to staff nurses experiences of clinical learning were identified: Giving and Receiving; Advancing Professionally and Personally; Balancing Act; Getting to Know and Working with You; and Past and Present. This research highlights staff nurses' experiences of clinical learning in undergraduate nursing education. Staff nurses exert a powerful, long lasting influence on students. A need exists to prepare and judiciously select nurses to work with students. Clinical agencies and universities can take joint responsibility providing tangible incentives, financial compensation, and recognition to all nurses working with nursing students. Copyright © 2014 Elsevier Ltd. All rights reserved.

  11. Open educational resources: staff attitudes and awareness

    Directory of Open Access Journals (Sweden)

    Vivien Rolfe

    2012-02-01

    Full Text Available Attitudes are changing in education globally to promote the open sharing of educational courses and resources. The aim of this study was to explore staff awareness and attitudes toward ‘open educational resources’ (OER as a benchmark for monitoring future progress. Faculty staff (n=6 were invited to participate in semi-structured interviews which facilitated the development of a questionnaire. Staff respondents (n=50 were not familiar with the term OER but had a clear notion of what it meant. They were familiar with open content repositories within the university but not externally. A culture of borrowing and sharing of resources exists between close colleagues, but not further a field, and whilst staff would obtain resources from the Internet they were reticent to place materials there. Drivers for mobilising resources included a strong belief in open education, the ability of OER to enhance individual and institutional reputations, and economic factors. Barriers to OER included confusion over copyright and lack of IT support. To conclude, there is a positive collegiate culture within the faculty, and overcoming the lack of awareness and dismantling the barriers to sharing will help advance the open educational practices, benefiting both faculty staff and the global community.

  12. Understanding Job Stress among Healthcare Staff

    Directory of Open Access Journals (Sweden)

    Dola Saha

    2011-04-01

    Full Text Available Introduction: Job life is an important part of a person’s daily life. There are many aspects of a job. A person may be satisfied with one or more aspects of his/her job but at the same time may be unhappy with other things related to the job. Objective: To evaluate the sources of job stress (stressful aspects of work among the staff of a super specialty hospital & to suggest measures to decrease level of job stress. Methodology: Descriptive study employing 381 staff members of a super specialty hospital using a structured personal interview questionnaire consisting of 21 sources of stress. The hospital staff was asked to rate each item according to the extent to which it had contributed to their stress as experienced in their jobs in the past few months on a scale of 0 (not at all,1(a little, 2(quite a bit, 3 (a lot. A global rating of stress was also obtained. Result: The prime sources of stress were found to be underpayment (76%, excessive workload (70.3%, inadequate staff (48.6, & being involved in the emotional distress of patients (46.7%. Conclusion: The staffs of the hospital were in moderate stress due to the prime stressors so adequate measures should be taken to alleviate these stressors. This could be achieved through workload management, job redesign, & by offering occupational health education.

  13. Evaluating Burnout among Administrative and Healthcare Staffs

    Directory of Open Access Journals (Sweden)

    Neda Khorshidian

    2015-06-01

    Full Text Available Background & Aims of the Study Burnout is an occupational hazard which is known as one of the major factors affecting employees’ psychological disorders. The present study aimed to evaluate occupational burnout among administrative and healthcare staffs of Shiraz University of Medical Sciences. Materials & Methods In this cross sectional study, 300 employees (150 administrative staff and 150 health care staff were selected using random sampling method. Data were collected using Maslach Burnout Inventory and analyzed using SPSS software. Results: The mean of burnout was 2.33±0.60. The results showed no significant difference between men and women employees in terms of occupational burnout and its three dimensions. Moreover, a significant difference between administrative and medical staffs  were found only in the dimension of emotional exhaustion. The mean score of emotional exhaustion in the administrative staff was significantly lower than that of their peers in the healthcare sector (2.03±0.84vs. 2.36±1.00 (p=0.03. Conclusions: The results showed that the majority of employees reported an average level of burnout .Such finding was in agreement with the results reported in previous studies. The obtained results can pave the way for further study on the identifying determinants of burnout.

  14. Innovative public library services - staff-less or staff-intensive?

    DEFF Research Database (Denmark)

    Johannsen, Carl Gustav Viggo

    2014-01-01

    Purpose – Several recent library innovations seem to make professional and clerical staff superfluous such as automated loan and delivery equipment, staff-less libraries open in 80 hours a week, and virtual services, enabling users to search the library catalogue and make reservations of library...

  15. Preschool Units EMIS Staff Report. EMIS Staff ECE Units 2005. Report Documentation. Version 1.0

    Science.gov (United States)

    Ohio Department of Education, 2004

    2004-01-01

    The purpose of Preschool Units EMIS Staff Report is twofold. First, it helps School Districts and Educational Service Centers (ESC) ensure accuracy and validity of preschool staff, student and program data submitted to the Ohio Department of Education (ODE) through the Education Management Information System (EMIS). From this report, school…

  16. Thermal depth profiling of vascular lesions: automated regularization of reconstruction algorithms

    Energy Technology Data Exchange (ETDEWEB)

    Verkruysse, Wim; Choi, Bernard; Zhang, Jenny R; Kim, Jeehyun; Nelson, J Stuart [Beckman Laser Institute and Medical Clinic, University of California, Irvine, CA 92612 (United States)], E-mail: wverkruy@uci.edu

    2008-03-07

    Pulsed photo-thermal radiometry (PPTR) is a non-invasive, non-contact diagnostic technique used to locate cutaneous chromophores such as melanin (epidermis) and hemoglobin (vascular structures). Clinical utility of PPTR is limited because it typically requires trained user intervention to regularize the inversion solution. Herein, the feasibility of automated regularization was studied. A second objective of this study was to depart from modeling port wine stain PWS, a vascular skin lesion frequently studied with PPTR, as strictly layered structures since this may influence conclusions regarding PPTR reconstruction quality. Average blood vessel depths, diameters and densities derived from histology of 30 PWS patients were used to generate 15 randomized lesion geometries for which we simulated PPTR signals. Reconstruction accuracy for subjective regularization was compared with that for automated regularization methods. The objective regularization approach performed better. However, the average difference was much smaller than the variation between the 15 simulated profiles. Reconstruction quality depended more on the actual profile to be reconstructed than on the reconstruction algorithm or regularization method. Similar, or better, accuracy reconstructions can be achieved with an automated regularization procedure which enhances prospects for user friendly implementation of PPTR to optimize laser therapy on an individual patient basis.

  17. Thermal depth profiling of vascular lesions: automated regularization of reconstruction algorithms

    Science.gov (United States)

    Verkruysse, Wim; Choi, Bernard; Zhang, Jenny R.; Kim, Jeehyun; Nelson, J. Stuart

    2008-03-01

    Pulsed photo-thermal radiometry (PPTR) is a non-invasive, non-contact diagnostic technique used to locate cutaneous chromophores such as melanin (epidermis) and hemoglobin (vascular structures). Clinical utility of PPTR is limited because it typically requires trained user intervention to regularize the inversion solution. Herein, the feasibility of automated regularization was studied. A second objective of this study was to depart from modeling port wine stain PWS, a vascular skin lesion frequently studied with PPTR, as strictly layered structures since this may influence conclusions regarding PPTR reconstruction quality. Average blood vessel depths, diameters and densities derived from histology of 30 PWS patients were used to generate 15 randomized lesion geometries for which we simulated PPTR signals. Reconstruction accuracy for subjective regularization was compared with that for automated regularization methods. The objective regularization approach performed better. However, the average difference was much smaller than the variation between the 15 simulated profiles. Reconstruction quality depended more on the actual profile to be reconstructed than on the reconstruction algorithm or regularization method. Similar, or better, accuracy reconstructions can be achieved with an automated regularization procedure which enhances prospects for user friendly implementation of PPTR to optimize laser therapy on an individual patient basis.

  18. Regularization and Iterative Methods for Monotone Variational Inequalities

    Directory of Open Access Journals (Sweden)

    Xiubin Xu

    2010-01-01

    Full Text Available We provide a general regularization method for monotone variational inequalities, where the regularizer is a Lipschitz continuous and strongly monotone operator. We also introduce an iterative method as discretization of the regularization method. We prove that both regularization and iterative methods converge in norm.

  19. Power-law regularities in human language

    Science.gov (United States)

    Mehri, Ali; Lashkari, Sahar Mohammadpour

    2016-11-01

    Complex structure of human language enables us to exchange very complicated information. This communication system obeys some common nonlinear statistical regularities. We investigate four important long-range features of human language. We perform our calculations for adopted works of seven famous litterateurs. Zipf's law and Heaps' law, which imply well-known power-law behaviors, are established in human language, showing a qualitative inverse relation with each other. Furthermore, the informational content associated with the words ordering, is measured by using an entropic metric. We also calculate fractal dimension of words in the text by using box counting method. The fractal dimension of each word, that is a positive value less than or equal to one, exhibits its spatial distribution in the text. Generally, we can claim that the Human language follows the mentioned power-law regularities. Power-law relations imply the existence of long-range correlations between the word types, to convey an especial idea.

  20. Towards lattice-regularized Quantum Gravity

    CERN Document Server

    Diakonov, Dmitri

    2011-01-01

    Using the Cartan formulation of General Relativity, we construct a well defined lattice-regularized theory capable to describe large non-perturbative quantum fluctuations of the frame field (or the metric) and of the spin connection. To that end we need to present the tetrad by a composite field built as a bilinear combination of fermion fields. The theory is explicitly invariant under local Lorentz transformations and, in the continuum limit, under general covariant transformations, or diffeomorphisms. Being well defined for large and fast varying fields at the ultraviolet cutoff, the theory simultaneously has chances of reproducing standard General Relativity in the infrared continuum limit. The present regularization of quantum gravity opens new possibilities of its unification with the Standard Model.

  1. Basic analysis of regularized series and products

    CERN Document Server

    Jorgenson, Jay A

    1993-01-01

    Analytic number theory and part of the spectral theory of operators (differential, pseudo-differential, elliptic, etc.) are being merged under amore general analytic theory of regularized products of certain sequences satisfying a few basic axioms. The most basic examples consist of the sequence of natural numbers, the sequence of zeros with positive imaginary part of the Riemann zeta function, and the sequence of eigenvalues, say of a positive Laplacian on a compact or certain cases of non-compact manifolds. The resulting theory is applicable to ergodic theory and dynamical systems; to the zeta and L-functions of number theory or representation theory and modular forms; to Selberg-like zeta functions; andto the theory of regularized determinants familiar in physics and other parts of mathematics. Aside from presenting a systematic account of widely scattered results, the theory also provides new results. One part of the theory deals with complex analytic properties, and another part deals with Fourier analys...

  2. Chiral Perturbation Theory With Lattice Regularization

    CERN Document Server

    Ouimet, P P A

    2005-01-01

    In this work, alternative methods to regularize chiral perturbation theory are discussed. First, Long Distance Regularization will be considered in the presence of the decuplet of the lightest spin 32 baryons for several different observables. This serves motivation and introduction to the use of the lattice regulator for chiral perturbation theory. The mesonic, baryonic and anomalous sectors of chiral perturbation theory will be formulated on a lattice of space time points. The consistency of the lattice as a regulator will be discussed in the context of the meson and baryon masses. Order a effects will also be discussed for the baryon masses, sigma terms and magnetic moments. The work will close with an attempt to derive an effective Wess-Zumino-Witten Lagrangian for Wilson fermions at non-zero a. Following this discussion, there will be a proposal for a phenomenologically useful WZW Lagrangian at non-zero a.

  3. Testing the Equivalence of Regular Languages

    Directory of Open Access Journals (Sweden)

    Marco Almeida

    2009-07-01

    Full Text Available The minimal deterministic finite automaton is generally used to determine regular languages equality. Antimirov and Mosses proposed a rewrite system for deciding regular expressions equivalence of which Almeida et al. presented an improved variant. Hopcroft and Karp proposed an almost linear algorithm for testing the equivalence of two deterministic finite automata that avoids minimisation. In this paper we improve the best-case running time, present an extension of this algorithm to non-deterministic finite automata, and establish a relationship between this algorithm and the one proposed in Almeida et al. We also present some experimental comparative results. All these algorithms are closely related with the recent coalgebraic approach to automata proposed by Rutten.

  4. Least square regularized regression in sum space.

    Science.gov (United States)

    Xu, Yong-Li; Chen, Di-Rong; Li, Han-Xiong; Liu, Lu

    2013-04-01

    This paper proposes a least square regularized regression algorithm in sum space of reproducing kernel Hilbert spaces (RKHSs) for nonflat function approximation, and obtains the solution of the algorithm by solving a system of linear equations. This algorithm can approximate the low- and high-frequency component of the target function with large and small scale kernels, respectively. The convergence and learning rate are analyzed. We measure the complexity of the sum space by its covering number and demonstrate that the covering number can be bounded by the product of the covering numbers of basic RKHSs. For sum space of RKHSs with Gaussian kernels, by choosing appropriate parameters, we tradeoff the sample error and regularization error, and obtain a polynomial learning rate, which is better than that in any single RKHS. The utility of this method is illustrated with two simulated data sets and five real-life databases.

  5. Effort variation regularization in sound field reproduction

    DEFF Research Database (Denmark)

    Stefanakis, Nick; Jacobsen, Finn; Sarris, Ioannis

    2010-01-01

    . Specifically, it is suggested that the phase differential of the source driving signals should be in agreement with the phase differential of the desired sound pressure field. The performance of the suggested method is compared with that of conventional effort regularization, wave field synthesis (WFS......In this paper, active control is used in order to reproduce a given sound field in an extended spatial region. A method is proposed which minimizes the reproduction error at a number of control positions with the reproduction sources holding a certain relation within their complex strengths......), and adaptive wave field synthesis (AWFS), both under free-field conditions and in reverberant rooms. It is shown that effort variation regularization overcomes the problems associated with small spaces and with a low ratio of direct to reverberant energy, improving thus the reproduction accuracy...

  6. Totally Corrective Boosting for Regularized Risk Minimization

    CERN Document Server

    Shen, Chunhua; Barnes, Nick

    2010-01-01

    Consideration of the primal and dual problems together leads to important new insights into the characteristics of boosting algorithms. In this work, we propose a general framework that can be used to design new boosting algorithms. A wide variety of machine learning problems essentially minimize a regularized risk functional. We show that the proposed boosting framework, termed CGBoost, can accommodate various loss functions and different regularizers in a totally-corrective optimization fashion. We show that, by solving the primal rather than the dual, a large body of totally-corrective boosting algorithms can actually be efficiently solved and no sophisticated convex optimization solvers are needed. We also demonstrate that some boosting algorithms like AdaBoost can be interpreted in our framework--even their optimization is not totally corrective. We empirically show that various boosting algorithms based on the proposed framework perform similarly on the UCIrvine machine learning datasets [1] that we hav...

  7. A Single Sex Profession? Female Staff Numbers in Commonwealth Universities.

    Science.gov (United States)

    Lund, Helen

    This study of numbers of female academic and administrative staff at universities in British Commonwealth nations was based on staff data collected during 1997-98 for the "Commonwealth Universities' Yearbook." The survey covers 30 nations. Survey results are presented separately for academic staff and administrative staff. For academic…

  8. Staff Involvement and the Public Library Planning Process.

    Science.gov (United States)

    Stephens, Annabel K.

    1989-01-01

    Reports the results of a study of two library systems' differing approaches to staff involvement in library planning. The systems' attempts to prepare staff members, keep them informed, and encourage staff participation are described, and the resulting benefits are contrasted. Suggestions for successful staff involvement are offered. (34…

  9. Strategies for Planning Staff Development Programs: A Web of Knowledge.

    Science.gov (United States)

    LaMesa - Spring Valley School District, CA.

    In 1977, 13 staff development projects were initiated in California under ESEA Title IV-C. The task of each project was to design and implement a unique system for developing a comprehensive staff development program. The materials in this book describe one of the 13 staff development projects: a "Service Center" for staff development that was…

  10. JOB CENTRE FOR DOMESTIC STAFF IN SWITZERLAND

    CERN Multimedia

    Relations with the Host States Service; http://www.cern.ch/relations/

    2001-01-01

    The Permanent mission of Switzerland to the International Organisations in Geneva has informed CERN that the Geneva Welcome Centre has set up an employment registration desk for the domestic staff of international civil servants. The aim of this pilot project is, on the one hand, to help international civil servants find domestic staff and, on the other hand, to help domestic staff holding an 'F'-type carte de légitimation find employment within 30 days after the expiry of a contract. For more information, please contact the Geneva Welcome Centre, La Pastorale, 106, route de Ferney, Case postale 103, 1211 Genève 20, tel. (+41.22) 918 02 70, fax (+41.22) 918 02 79), http://geneva-international.org/Welcome.E.html.

  11. Ward management: education for senior staff nurses.

    Science.gov (United States)

    Reed, Sarah

    2008-04-01

    The key professional challenges for senior staff nurses relate to managerial rather than clinical issues, but there appears to be a lack of educational preparation for the managerial roles expected of them. An educational service was developed, implemented and evaluated in a specialist paediatric unit to address senior staff nurses' concerns related to managerial aspects of their role. An organisational development model was used to negotiate a work-based learning programme that incorporated practice competencies. This was undertaken at an Agenda for Change implementation site, which enabled the Knowledge and Skills Framework (KSF) to be trialled in practice. The educational programme was evaluated positively and practice competency evaluations highlighted how the KSF dimensions provided a usable and relevant breakdown of managerial and leadership issues. The framework provided a professional development tool for staff wishing to progress their managerial knowledge and skills while under supervision.

  12. Staff Performance Evaluation in Public Organizations

    Directory of Open Access Journals (Sweden)

    Drumea C.

    2014-12-01

    Full Text Available In public Organizations staff performance is difficult to measure in absence of overall quantitative performance indicators. There are also the qualitative indicators that give an overview on staff’s motivation, strive, ability, commitment to values, teamwork. These aspects are even less easy to illustrate, in private and public sectors equally. In both cases, measuring staff performance at work, as well as its input on the global performance of the organization is a difficult task which has in practice different approaches. Subsequently, this paper is discussing the system indicators and performance triggers used in International Organizations UN affiliated, in order to adjust staff classification and benefits to their staff’s performance.

  13. The different roles of the Staff association

    CERN Multimedia

    Staff Association

    2012-01-01

    The statutory role of the CERN Staff Association is defined in Chapter VII of the Staff Rules and Regulations. The means of the Association to realize its aims are described in Article I.1.3 of the Statutes of the CERN Staff Association. Generally speaking, its aims are “To serve and defend the economic, social, professional and moral interests of its members and all CERN staff“. Usually we deal with professional and social issues (employment conditions, defence of collective or individual rights, promotion of basic research...). But the Association also plays a role of integration (clubs promoting cultural, humanitarian, and sport or offering entertainment, organizing exhibitions and conferences) and it can promote actions to provide its members with material or social advantages (Interfon, commercial offers). Advantageous commercial offers In recent years the Association was able to negotiate with business or cultural partners benefits for its members. A full list can be found on our...

  14. Regular black hole in three dimensions

    OpenAIRE

    Myung, Yun Soo; Yoon, Myungseok

    2008-01-01

    We find a new black hole in three dimensional anti-de Sitter space by introducing an anisotropic perfect fluid inspired by the noncommutative black hole. This is a regular black hole with two horizons. We compare thermodynamics of this black hole with that of non-rotating BTZ black hole. The first-law of thermodynamics is not compatible with the Bekenstein-Hawking entropy.

  15. A short proof of increased parabolic regularity

    Directory of Open Access Journals (Sweden)

    Stephen Pankavich

    2015-08-01

    Full Text Available We present a short proof of the increased regularity obtained by solutions to uniformly parabolic partial differential equations. Though this setting is fairly introductory, our new method of proof, which uses a priori estimates and an inductive method, can be extended to prove analogous results for problems with time-dependent coefficients, advection-diffusion or reaction diffusion equations, and nonlinear PDEs even when other tools, such as semigroup methods or the use of explicit fundamental solutions, are unavailable.

  16. Regular aspirin use and lung cancer risk

    Directory of Open Access Journals (Sweden)

    Cummings K

    2002-11-01

    Full Text Available Abstract Background Although a large number of epidemiological studies have examined the role of aspirin in the chemoprevention of colon cancer and other solid tumors, there is a limited body of research focusing on the association between aspirin and lung cancer risk. Methods We conducted a hospital-based case-control study to evaluate the role of regular aspirin use in lung cancer etiology. Study participants included 868 cases with primary, incident lung cancer and 935 hospital controls with non-neoplastic conditions who completed a comprehensive epidemiological questionnaire. Participants were classified as regular aspirin users if they had taken the drug at least once a week for at least one year. Results Results indicated that lung cancer risk was significantly lower for aspirin users compared to non-users (adjusted OR = 0.57; 95% CI 0.41–0.78. Although there was no clear evidence of a dose-response relationship, we observed risk reductions associated with greater frequency of use. Similarly, prolonged duration of use and increasing tablet years (tablets per day × years of use was associated with reduced lung cancer risk. Risk reductions were observed in both sexes, but significant dose response relationships were only seen among male participants. When the analyses were restricted to former and current smokers, participants with the lowest cigarette exposure tended to benefit most from the potential chemopreventive effect of aspirin. After stratification by histology, regular aspirin use was significantly associated with reduced risk of small cell lung cancer and non-small cell lung cancer. Conclusions Overall, results from this hospital-based case-control study suggest that regular aspirin use may be associated with reduced risk of lung cancer.

  17. Bouncing cosmology inspired by regular black holes

    Science.gov (United States)

    Neves, J. C. S.

    2017-09-01

    In this article, we present a bouncing cosmology inspired by a family of regular black holes. This scale-dependent cosmology deviates from the cosmological principle by means of a scale factor which depends on the time and the radial coordinate as well. The model is isotropic but not perfectly homogeneous. That is, this cosmology describes a universe almost homogeneous only for large scales, such as our observable universe.

  18. Regular black hole in three dimensions

    OpenAIRE

    Myung, Yun Soo; Yoon, Myungseok

    2008-01-01

    We find a new black hole in three dimensional anti-de Sitter space by introducing an anisotropic perfect fluid inspired by the noncommutative black hole. This is a regular black hole with two horizons. We compare thermodynamics of this black hole with that of non-rotating BTZ black hole. The first-law of thermodynamics is not compatible with the Bekenstein-Hawking entropy.

  19. Stream Processing Using Grammars and Regular Expressions

    DEFF Research Database (Denmark)

    Rasmussen, Ulrik Terp

    Kleenex, a language for expressing high-performance streaming string processing programs as regular grammars with embedded semantic actions, and its compilation to streaming string transducers with worst-case linear-time performance. Its underlying theory is based on transducer decomposition into oracle...... is based on a bottom-up tabulation algorithm reformulated using least fixed points and evaluated using an instance of the chaotic iteration scheme by Cousot and Cousot....

  20. Sparse regularization for force identification using dictionaries

    Science.gov (United States)

    Qiao, Baijie; Zhang, Xingwu; Wang, Chenxi; Zhang, Hang; Chen, Xuefeng

    2016-04-01

    The classical function expansion method based on minimizing l2-norm of the response residual employs various basis functions to represent the unknown force. Its difficulty lies in determining the optimum number of basis functions. Considering the sparsity of force in the time domain or in other basis space, we develop a general sparse regularization method based on minimizing l1-norm of the coefficient vector of basis functions. The number of basis functions is adaptively determined by minimizing the number of nonzero components in the coefficient vector during the sparse regularization process. First, according to the profile of the unknown force, the dictionary composed of basis functions is determined. Second, a sparsity convex optimization model for force identification is constructed. Third, given the transfer function and the operational response, Sparse reconstruction by separable approximation (SpaRSA) is developed to solve the sparse regularization problem of force identification. Finally, experiments including identification of impact and harmonic forces are conducted on a cantilever thin plate structure to illustrate the effectiveness and applicability of SpaRSA. Besides the Dirac dictionary, other three sparse dictionaries including Db6 wavelets, Sym4 wavelets and cubic B-spline functions can also accurately identify both the single and double impact forces from highly noisy responses in a sparse representation frame. The discrete cosine functions can also successfully reconstruct the harmonic forces including the sinusoidal, square and triangular forces. Conversely, the traditional Tikhonov regularization method with the L-curve criterion fails to identify both the impact and harmonic forces in these cases.

  1. Computational Topology for Regular Closed Sets

    OpenAIRE

    project, The I-TANGO; :; Peters, T J; Bisceglio, J.; Ferguson, D. R.; Hoffmann, C.M.; Maekawa, T.; Patrikalakis, N.M.; Sakkalis, T.; N F Stewart

    2004-01-01

    The Boolean algebra of regular closed sets is prominent in topology, particularly as a dual for the Stone-Cech compactification. This algebra is also central for the theory of geometric computation, as a representation for combinatorial operations on geometric sets. However, the issue of computational approximation introduces unresolved subtleties that do not occur within "pure" topology. One major effort towards reconciling this mathematical theory with computational practice is our ongoing ...

  2. Hyperspectral Image Recovery via Hybrid Regularization

    Science.gov (United States)

    Arablouei, Reza; de Hoog, Frank

    2016-12-01

    Natural images tend to mostly consist of smooth regions with individual pixels having highly correlated spectra. This information can be exploited to recover hyperspectral images of natural scenes from their incomplete and noisy measurements. To perform the recovery while taking full advantage of the prior knowledge, we formulate a composite cost function containing a square-error data-fitting term and two distinct regularization terms pertaining to spatial and spectral domains. The regularization for the spatial domain is the sum of total-variation of the image frames corresponding to all spectral bands. The regularization for the spectral domain is the l1-norm of the coefficient matrix obtained by applying a suitable sparsifying transform to the spectra of the pixels. We use an accelerated proximal-subgradient method to minimize the formulated cost function. We analyze the performance of the proposed algorithm and prove its convergence. Numerical simulations using real hyperspectral images exhibit that the proposed algorithm offers an excellent recovery performance with a number of measurements that is only a small fraction of the hyperspectral image data size. Simulation results also show that the proposed algorithm significantly outperforms an accelerated proximal-gradient algorithm that solves the classical basis-pursuit denoising problem to recover the hyperspectral image.

  3. Regularization Parameter Selections via Generalized Information Criterion.

    Science.gov (United States)

    Zhang, Yiyun; Li, Runze; Tsai, Chih-Ling

    2010-03-01

    We apply the nonconcave penalized likelihood approach to obtain variable selections as well as shrinkage estimators. This approach relies heavily on the choice of regularization parameter, which controls the model complexity. In this paper, we propose employing the generalized information criterion (GIC), encompassing the commonly used Akaike information criterion (AIC) and Bayesian information criterion (BIC), for selecting the regularization parameter. Our proposal makes a connection between the classical variable selection criteria and the regularization parameter selections for the nonconcave penalized likelihood approaches. We show that the BIC-type selector enables identification of the true model consistently, and the resulting estimator possesses the oracle property in the terminology of Fan and Li (2001). In contrast, however, the AIC-type selector tends to overfit with positive probability. We further show that the AIC-type selector is asymptotically loss efficient, while the BIC-type selector is not. Our simulation results confirm these theoretical findings, and an empirical example is presented. Some technical proofs are given in the online supplementary material.

  4. [Investigation on cognition of zoonosis among veterinary clinical staff].

    Science.gov (United States)

    Takinami, Kenji

    2005-10-01

    We conducted a survey to determine how much veterinary clinic staff, including veterinary surgeon and veterinary technicians, know about zoonosis. Response was 52.5%. All staff members knew of zoonosis. Staff members who knew what zoonosis meant accounted for 98%. Staff members trained in zoonosis accounted for 75% among veterinary surgeons and 66% among veterinary technicians. Staff members who thought that zoonosis would increase in future accounted for 92% among veterinary surgeons and 79% among veterinary technicians. Staff members who were asked by pet owners about zoonosis accounted for 87% among veterinary surgeons and 51% among veterinary technicians. Staff members who thought veterinary surgeons must report zoonosis to public health centers accounted for 96% among veterinary surgeons and 88% among veterinary technicians. Veterinary clinic staffs thus had correct knowledge and were aware of zoonosis. The network of medical staff and veterinary staff could therefore build on this result.

  5. On Fuzzy Regular-I-Closed Sets, Fuzzy Semi-I-Regular Sets, Fuzzy ABI-Sets and Decompositions of Fuzzy Regular-I-Continuity, Fuzzy AI - Continuity

    OpenAIRE

    Yildiz, Cemil; ABBAS, Fadhil

    2011-01-01

     The concepts of fuzzy regular-I-closed set and fuzzy semi-I-regular set in fuzzy ideal topological spaces are investigated and some of their properties are obtained. Key words: Topological, Spaces, Fuzzy, Regular, Sets

  6. The problem of bias when nursing facility staff administer customer satisfaction surveys.

    Science.gov (United States)

    Hodlewsky, R Tamara; Decker, Frederic H

    2002-10-01

    Customer satisfaction instruments are being used with increasing frequency to assess and monitor residents' assessments of quality of care in nursing facilities. There is no standard protocol, however, for how or by whom the instruments should be administered when anonymous, written responses are not feasible. Researchers often use outside interviewers to assess satisfaction, but cost considerations may limit the extent to which facilities are able to hire outside interviewers on a regular basis. This study was designed to investigate the existence and extent of any bias caused by staff administering customer satisfaction surveys. Customer satisfaction data were collected in 1998 from 265 residents in 21 nursing facilities in North Dakota. Half the residents in each facility were interviewed by staff members and the other half by outside consultants; scores were compared by interviewer type. In addition to a tabulation of raw scores, ordinary least-squares analysis with facility fixed effects was used to control for resident characteristics and unmeasured facility-level factors that could influence scores. Significant positive bias was found when staff members interviewed residents. The bias was not limited to questions directly affecting staff responsibilities but applied across all types of issues. The bias was robust under varying constructions of satisfaction and dissatisfaction. A uniform method of survey administration appears to be important if satisfaction data are to be used to compare facilities. Bias is an important factor that should be considered and weighed against the costs of obtaining outside interviewers when assessing customer satisfaction among long term care residents.

  7. Seroprevalence of Toxoplasma gondii infection among veterinary staff in Ontario, Canada (2002: Implications for teratogenic risk

    Directory of Open Access Journals (Sweden)

    Soldin Offie

    2003-05-01

    Full Text Available Abstract Background Toxoplasma gondii infection is embryotoxic in humans. It is mainly transmitted through raw/undercooked meat and ingestion of oocysts in cat feces. There remains controversy about the actual risk of cats transmitting the disease to humans. Our primary objective was to determine the seroprevalence of T. gondii antibody among veterinary staff, to ascertain whether they have an increased risk through occupational exposure. Our secondary objective was to examine their practices regarding cats, toxoplasma infection, and pregnancy. Methods Veterinary staff attending the 2002 Annual Ontario Veterinary Medical Association Conference were invited to discuss their toxoplasma seroprevalence. Interested attendees completed a questionnaire and a physician drew blood samples to determine T. gondii titres using the ELISA IgG test. Results We collected 161 completed questionnaires, and 141 blood samples. There were 20 (14.2%, CI95%:8.4–19.9% reactive titres among the veterinarian staff (80% females aged 30–45. All were regularly exposed to cats, washed their hands when in contact and few wore gloves routinely. Conclusions These findings of low positive rates may be used to reassure veterinary staff that their exposure to cats does not appear to increase their risk of contracting toxoplasma infection and that pregnant women are not at an increased risk by owning a cat.

  8. Regularized Multiple-Set Canonical Correlation Analysis

    Science.gov (United States)

    Takane, Yoshio; Hwang, Heungsun; Abdi, Herve

    2008-01-01

    Multiple-set canonical correlation analysis (Generalized CANO or GCANO for short) is an important technique because it subsumes a number of interesting multivariate data analysis techniques as special cases. More recently, it has also been recognized as an important technique for integrating information from multiple sources. In this paper, we…

  9. Adaptive diffusion regularization for enhancement of microcalcifications in digital breast tomosynthesis (DBT) reconstruction

    Science.gov (United States)

    Lu, Yao; Chan, Heang-Ping; Fessler, Jeffrey A.; Hadjiiski, Lubomir; Wei, Jun; Goodsitt, Mitchell M.

    2011-03-01

    Digital breast tomosynthesis (DBT) has been shown to increase mass detection. Detection of microcalcifications in DBT is challenging because of the small, subtle signals to be searched in the large breast volume and the noise in the reconstructed volume. We developed an adaptive diffusion (AD) regularization method that can differentially regularize noise and potential signal regions during reconstruction based on local contrast-to-noise ratio (CNR) information. This method adaptively applies different degrees of regularity to signal and noise regions, as guided by a CNR map for each DBT slice within the image volume, such that potential signals will be preserved while noise is suppressed. DBT scans of an American College of Radiology phantom and the breast of a subject with biopsy-proven calcifications were acquired with a GE prototype DBT system at 21 angles in 3° increments over a +/-30° range. Simultaneous algebraic reconstruction technique (SART) was used for DBT reconstruction. The AD regularization method was compared to the non-convex total p-variation (TpV) method and SART with no regularization (NR) in terms of the CNR and the full width at half maximum (FWHM) of the central gray-level line profile in the focal plane of a calcification. The results demonstrated that the SART regularized by the AD method enhanced the CNR and preserved the sharpness of microcalcifications compared to reconstruction without regularization. The AD regularization was superior to the TpV method for subtle microcalcifications in terms of the CNR while the FWHM was comparable. The AD regularized reconstruction has the potential to improve the CNR of microcalcifications in DBT for human or machine detection.

  10. The impact of staff training on staff outcomes in dementia care: a systematic review.

    Science.gov (United States)

    Spector, Aimee; Revolta, Catherine; Orrell, Martin

    2016-11-01

    Caring for people with dementia can be emotionally challenging and is often linked to low job satisfaction and burnout in care staff. Staff training within care settings is potentially valuable in improving well-being and quality of care. This review aimed to (i) establish the impact of training on staff outcomes; (ii) compare the impact of different training approaches; (iii) explore the influence of training intensity; and (iv) explore potential barriers to success. A database search of staff training interventions revealed 207 papers, 188 of which were excluded based on prespecified criteria. Nineteen studies were included and appraised using a quality rating tool. Overall, the studies were found to be of variable quality; however, 16 studies found a significant change following training in at least one staff domain, with knowledge improving most frequently. Approaches focusing on managing challenging behaviours appeared to be the most effective. Training staff can be an effective method of improving well-being, and programmes helping staff to manage challenging behaviour appear to be the most beneficial. There is no clear relationship between training intensity and outcome. Most studies point to the importance of addressing organisational factors as a barrier to change. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.

  11. Staff Exchange or Legal Alien Programs

    DEFF Research Database (Denmark)

    Jørgensen, Rune Nørgaard

    2016-01-01

    SRA would very much like to support the exchange of best practice between members throughout the year and the Membership Committee is presently looking into the opportunities for a Staff Exchange or Legal Alien Program. However the International Section has already had the chance to provide...

  12. MEDICAL STAFF SCHEDULING USING SIMULATED ANNEALING

    Directory of Open Access Journals (Sweden)

    Ladislav Rosocha

    2015-07-01

    Full Text Available Purpose: The efficiency of medical staff is a fundamental feature of healthcare facilities quality. Therefore the better implementation of their preferences into the scheduling problem might not only rise the work-life balance of doctors and nurses, but also may result into better patient care. This paper focuses on optimization of medical staff preferences considering the scheduling problem.Methodology/Approach: We propose a medical staff scheduling algorithm based on simulated annealing, a well-known method from statistical thermodynamics. We define hard constraints, which are linked to legal and working regulations, and minimize the violations of soft constraints, which are related to the quality of work, psychic, and work-life balance of staff.Findings: On a sample of 60 physicians and nurses from gynecology department we generated monthly schedules and optimized their preferences in terms of soft constraints. Our results indicate that the final value of objective function optimized by proposed algorithm is more than 18-times better in violations of soft constraints than initially generated random schedule that satisfied hard constraints.Research Limitation/implication: Even though the global optimality of final outcome is not guaranteed, desirable solutionwas obtained in reasonable time. Originality/Value of paper: We show that designed algorithm is able to successfully generate schedules regarding hard and soft constraints. Moreover, presented method is significantly faster than standard schedule generation and is able to effectively reschedule due to the local neighborhood search characteristics of simulated annealing.

  13. Use staff wisely to save NHS money.

    Science.gov (United States)

    Moore, Alison

    2015-12-09

    The NHS could save up to £ 2 billion a year by improving workflow and containing workforce costs, according to Labour peer Lord Carter's review of NHS efficiency. Changes in areas such as rostering and management of annual leave must avoid increasing the pressure on staff.

  14. Between Education and Psychology: School Staff Perspectives

    Science.gov (United States)

    Corcoran, Tim; Finney, Dave

    2015-01-01

    When discussing contributions from psychology in/to educational practices like school-based mental health promotion, it is peculiar that psychologists (of an educational or clinical kind) or education-oriented sociologists, both not often based in schools or classrooms, dominate the topic. It has been acknowledged that school staff have been over…

  15. Ensuring Competent Staff in Adult Literacy Programs.

    Science.gov (United States)

    Newman, Anabel P.

    Since staff are a key element in adult literacy programs, this document outlines requirements and actions for effective administrative and instructional personnel for such programs. Addressing first administrative personnel and then instructional personnel, the paper describes skill and knowledge requirements, and recommends actions to be taken…

  16. Nonprofessional Staff in Libraries: A Mismanaged Resource.

    Science.gov (United States)

    Turner, Brenda G.

    1992-01-01

    Examines the neglect of library support staff within the context of six areas of library management: physical facilities; effective and efficient work stations; supplies; attitude toward human resources; communication and information; and performance evaluation and feedback. Graphs present data on expenditures in several areas, and suggestions for…

  17. Using Virtual Reference Transcripts for Staff Training.

    Science.gov (United States)

    Ward, David

    2003-01-01

    Describes a method of library staff training based on chat transcript analysis in which graduate student workers at a university reference desk examined transcripts of actual virtual reference desk transactions to analyze reference interviews. Discusses reference interview standards, reference desk behavior, and reference interview skills in…

  18. Staff Development in Problem-based Learning.

    Science.gov (United States)

    Murray, Ian; Savin-Baden, Maggi

    2000-01-01

    Argues that, for problem-based learning (PBL) to succeed, a sound program of staff development is required and describes the introduction of PBL into Nursing and Midwifery curricula at the University of Dundee (Scotland) including key components and evaluatory evidence to support its efficacy. (DB)

  19. Leisure Activities of University College Staff

    Science.gov (United States)

    Biernat, Elzbieta; Roguski, Karol

    2009-01-01

    Study aim: To determine the participation of academic teachers in leisure activities for that group contribute to shaping habits of a large percentage of young people. Material and methods: A group of 52 staff members (about 30%) of a private university college, aged 25-70 years, were interviewed with respect to their participation in sports,…

  20. Data Intelligence Training for Library Staff

    NARCIS (Netherlands)

    Verbakel, E.; Potters, N.; De Smaele, M.; Noordegraaf, M.

    2013-01-01

    The Data Intelligence 4 Librarians course was developed by 3TU.Datacentrum at the end of 2011 to provide online resources and training for digital preservation practitioners, specifically for library staff. The course objectives are to transfer and exchange knowledge about data management, and to pr

  1. Characteristics of Absenteeism in Nursing Home Staff.

    Science.gov (United States)

    Cohen-Mansfield, Jiska; Rosenthal, Alvin S.

    This study investigated factors associated with absenteeism among nursing staff (N=219) at a long-term care facility. Four absenteeism measures were calculated from personnel records for each month of the year: no pay (the sum of unscheduled, unpaid sick, and leave without pay), part day (the sum of arrived late and left early), paid sick, and…

  2. Staff Development; Mini Models for College Implementation.

    Science.gov (United States)

    Peterson, Gary T., Ed.

    One hundred twenty-seven participants at a June 1975 symposium in Squaw Valley, California, made use of a prescribed problem-solving process in order to originate a number of parts of a total staff development effort for a simulated community college. The developmental stages in the process included brainstorming, needs assessment, resource…

  3. Staff-Development Program. Maxi I Practicum.

    Science.gov (United States)

    Tutalo, Anthony J.

    Described are various aspects of a program to train school personnel to meet the special needs of mainstreamed children. The staff development program is discussed in terms of program responsibility, strategy, and steps taken by the principal in the implementation procedure. The four stages of Project RETAP, a special education in-service program…

  4. Means of Staff Number Reduction and Outplacement

    Directory of Open Access Journals (Sweden)

    Urbancová H.

    2014-09-01

    Full Text Available The paper focuses on staff number reducing in Czech organizations because it is an important issue due to adaptation to changing economic conditions and ongoing financial crisis. The number of organizations reducing their staff number goes up in all sectors of economy including agriculture and the problem is associated with financial costs. The objective is to present the ways of staff number reduction in Czech organizations and outplacement for the laid-off workers and a partial objective is to compare the results with those in the Slovak Republic. Moreover, the paper discusses the recommendation in the sphere of knowledge continuity for organizations and it also examines the cost level of employees’ turnover. The results were obtained by implementing quantitative research with the help of questionnaire data collection (n = 109 which were analyzed by the tools of descriptive statistics. Results show that 52.3% of organizations have reduced their staff number. However, outplacement was used by only 10.1% of the addressed Czech organizations, out of which 28.6% were agricultural.

  5. Teaching Staff Advanced Training: European Experience

    Science.gov (United States)

    Kovalchuk, Vasyl

    2015-01-01

    The issue of teaching staff advanced training is paid much attention in many countries. In the Republic of Moldova progressive professional credits system is used. Credits are scored not only in assigning teaching degrees or issuing a certificate of continuing professional education, but also for teachers' evaluation at the educational…

  6. How Efficient is Your Central Office Staff?

    Science.gov (United States)

    Hertling, James E.; Getz, Howard G.

    1970-01-01

    The increasing need for specialization into today's schools has resulted in an increase in the size of most office staffs. If schools are to get their dollar's worth out of their employees, administrators will have to analyze carefully the function of each person employed. (CK)

  7. Costing Child Protective Services Staff Turnover.

    Science.gov (United States)

    Graef, Michelle I.; Hill, Erick L.

    2000-01-01

    Details process of determining a child welfare agency's actual dollar costs directly attributed to protective services staff turnover, using the agency's human resources database and interviews with administrative personnel. Provides formulas and process for calculating specific cost elements due to employee separation, replacement, and training.…

  8. Engaging Frontline Leaders and Staff in Real-Time Improvement.

    Science.gov (United States)

    Phillips, Jennifer; Hebish, Linda J; Mann, Sharon; Ching, Joan M; Blackmore, C Craig

    2016-04-01

    The relationship of staff satisfaction and engagement to organizational success, along with the integral influence of frontline managers on this dimension, is well established in health care and other industries. To specifically address staff engagement, Virginia Mason Medical Center, an integrated, single-hospital health system, developed an approach that involved leaders, through the daily use of standard work for leaders, as well as staff, through a Lean-inspired staff idea system. Kaizen Promotion Office (KPO) staff members established three guiding principles: (1) Staff engagement begins with leader engagement; (2) Integrate daily improve- ment (kaizen) as a habitual way of life not as an add-on; and (3) Create an environment in which staff feel psycho- logically safe and valued. Two design elements--Standard Work for Leaders (SWL) and Everyday Lean Ideas (ELIs) were implemented. For the emergency department (ED), an early adopter of the staff engagement work, the challenge was to apply the guiding principles to improve staff engagement while improving quality and patient and staff satisfaction, even as patient volumes were increasing. Daily huddles for the KPO staff members and weekly leader rounds are used to elicit staff ideas and foster ELIs in real time. Overall progress to date has been tracked in terms of staff satisfaction surveys, voluntary staff turnover, adoption of SWL, and testing and implementation of staff ideas. For example, voluntary turnover of ED staff decreased from 14.6% in 2011 to 7.5% in 2012, and 2.0% in 2013. Organizationwide, at least 800 staff ideas are in motion at any given time, with finished ones posted in an idea supermarket website. A leadership and staff engagement approach that focuses on SWL and on capturing staff ideas for daily problem solving and improvement can contribute to organization success and improve the quality of health care delivery.

  9. Automatic Mesh Generation on a Regular Background Grid

    Institute of Scientific and Technical Information of China (English)

    LO S.H; 刘剑飞

    2002-01-01

    This paper presents an automatic mesh generation procedure on a 2D domainbased on a regular background grid. The idea is to devise a robust mesh generation schemewith equal emphasis on quality and efficiency. Instead of using a traditional regular rectangulargrid, a mesh of equilateral triangles is employed to ensure triangular element of the best qualitywill be preserved in the interior of the domain.As for the boundary, it is to be generated by a node/segment insertion process. Nodes areinserted into the background mesh one by one following the sequence of the domain boundary.The local structure of the mesh is modified based on the Delaunay criterion with the introduc-tion of each node. Those boundary segments, which are not produced in the phase of nodeinsertion, will be recovered through a systematic element swap process. Two theorems will bepresented and proved to set up the theoretical basic of the boundary recovery part. Exampleswill be presented to demonstrate the robustness and the quality of the mesh generated by theproposed technique.

  10. Sparse SAR imaging based on L1/2 regularization

    Institute of Scientific and Technical Information of China (English)

    ZENG JinShan; FANG Jian; XU ZongBen

    2012-01-01

    In this paper,a novel method for synthetic aperture radar (SAR) imaging is proposed.The approach is based on L1/2 regularization to reconstruct the scattering field,which optimizes a quadratic error term of the SAR observation process subject to the interested scene sparsity. Compared to the conventional SAR imaging technique,the new method implements SAR imaging effectively at much lower sampling rate than the Nyquist rate,and produces high-quality images with reduced sidelobes and increased resolution. Also,over the prevalent greedy pursuit and L1 regularization based SAR imaging methods,there are remarkable performance improvements of the new method.On one hand,the new method significantly reduces the number of measurements needed for reconstruction,as supported by a phase transition diagram study.On the other hand,the new method is more robust to the observation noise.These fundamental properties of the new method are supported and demonstrated both by simulations and real SAR data experiments.

  11. PDGI-BASED REGULAR SWEPT SURFACE EXTRACTION FROM POINT CLOUD

    Institute of Scientific and Technical Information of China (English)

    LI Jiangxiong; KE Yinglin; LI An; ZHU Weidong

    2006-01-01

    A principal direction Gaussian image (PDGI)-based algorithm is proposed to extract the regular swept surface from point cloud. Firstly, the PDGI of the regular swept surface is constructed from point cloud, then the bounding box of the Gaussian sphere is uniformly partitioned into a number of small cubes (3D grids) and the PDGI points on the Gaussian sphere are associated with the corresponding 3D grids. Secondly, cluster analysis technique is used to sort out a group of 3D grids containing more PDGI points among the 3D grids. By the connected-region growing algorithm, the congregation point or the great circle is detected from the 3D grids. Thus the translational direction is determined by the congregation point and the direction of the rotational axis is determined by the great circle. In addition, the positional point of the rotational axis is obtained by the intersection of all the projected normal lines of the rotational surface on the plane being perpendicular to the estimated direction of the rotational axis. Finally, a pattern search method is applied to optimize the translational direction and the rotational axis. Some experiments are used to illustrate the feasibility of the above algorithm.

  12. Limited-view ultrasonic guided wave tomography using an adaptive regularization method

    Science.gov (United States)

    Rao, Jing; Ratassepp, Madis; Fan, Zheng

    2016-11-01

    Ultrasonic guided waves are useful to assess the integrity of a structure from a remote location. Recently, tomography techniques have been developed to quantitatively estimate the thickness map of plate-like structures based on the dispersion characteristics of guided waves. In many applications only limited locations are available to place transducers. The missing viewing angles lead to artifacts which can degrade the image quality. To address this problem, this paper applies the regularization method to synthesize the missing components. The regularization technique is performed by an adaptive threshold approach to the limited view reconstruction. The effectiveness of this method combined with the full waveform inversion method is demonstrated by using numerical simulations as well as experiments on an irregularly shaped defect and two flat-bottom defects. The results indicate that the additional components obtained from the regularization method can significantly reduce the artifacts, leading to better reconstruction accuracy.

  13. The regularized blind tip reconstruction algorithm as a scanning probe microscopy tip metrology method

    CERN Document Server

    Jozwiak, G; Masalska, A; Gotszalk, T; Ritz, I; Steigmann, H

    2011-01-01

    The problem of an accurate tip radius and shape characterization is very important for determination of surface mechanical and chemical properties on the basis of the scanning probe microscopy measurements. We think that the most favorable methods for this purpose are blind tip reconstruction methods, since they do not need any calibrated characterizers and might be performed on an ordinary SPM setup. As in many other inverse problems also in case of these methods the stability of the solution in presence of vibrational and electronic noise needs application of so called regularization techniques. In this paper the novel regularization technique (Regularized Blind Tip Reconstruction - RBTR) for blind tip reconstruction algorithm is presented. It improves the quality of the solution in presence of isotropic and anisotropic noise. The superiority of our approach is proved on the basis of computer simulations and analysis of images of the Budget Sensors TipCheck calibration standard. In case of characterization ...

  14. Polynomial regularization for robust MRI-based estimation of blood flow velocities and pressure gradients.

    Science.gov (United States)

    Delles, Michael; Rengier, Fabian; Ley, Sebastian; von Tengg-Kobligk, Hendrik; Kauczor, Hans-Ulrich; Dillmann, Rüdiger; Unterhinninghofen, Roland

    2011-01-01

    In cardiovascular diagnostics, phase-contrast MRI is a valuable technique for measuring blood flow velocities and computing blood pressure values. Unfortunately, both velocity and pressure data typically suffer from the strong image noise of velocity-encoded MRI. In the past, separate approaches of regularization with physical a-priori knowledge and data representation with continuous functions have been proposed to overcome these drawbacks. In this article, we investigate polynomial regularization as an exemplary specification of combining these two techniques. We perform time-resolved three-dimensional velocity measurements and pressure gradient computations on MRI acquisitions of steady flow in a physical phantom. Results based on the higher quality temporal mean data are used as a reference. Thereby, we investigate the performance of our approach of polynomial regularization, which reduces the root mean squared errors to the reference data by 45% for velocities and 60% for pressure gradients.

  15. Co-creating Emotionally Safe Environments at Camp: Training Staff To Facilitate Adventure Activities.

    Science.gov (United States)

    Brownlee, Matt; Yerkes, Rita

    2003-01-01

    An emotionally safe environment helps campers participate in adventure activities. Staff development tips for creating a safe environment include using cooperative goal setting; using parallel training processes; developing working lesson plans that outline facilitation techniques for creating emotionally safe environments; and using co-created…

  16. 75 FR 73106 - Draft Guidance for Industry and Food and Drug Administration Staff; Establishing the Performance...

    Science.gov (United States)

    2010-11-29

    ... Staff; Establishing the Performance Characteristics of In Vitro Diagnostic Devices for the Detection of... such as the Real-Time Polymerase Chain Reaction technique). II. Significance of Guidance This draft... create or confer any rights for or on any person and does not operate to bind FDA or the public. An...

  17. The Role of Evaluation in Inservice and Staff Development for Educators of the Gifted.

    Science.gov (United States)

    Kulieke, Marilynn

    1986-01-01

    Classroom observation techniques and needs assessment strategies can be used to evaluate gifted program inservice and staff development for teachers. Inservice program length, quality, and type can be evaluated through use of pre and post inservice observation, comparison of inservice participants with nonparticipants, and assessment of changes in…

  18. Changing the Staff Selection Process for Special Education. Maxi II Report.

    Science.gov (United States)

    Vidaurri, Otilia V.

    Presented is the report on a practicum to implement a series of activities to assist Directors of Special Education in the task of personnel identification and selection. Specific issues considered are skills or competencies in special education staff roles, guidelines for special education certification in Texas, and practices and techniques in…

  19. Training Staff Serving Clients with Intellectual Disabilities: A Meta-Analysis of Aspects Determining Effectiveness

    Science.gov (United States)

    van Oorsouw, Wietske M. W. J.; Embregts, Petri J. C. M.; Bosman, Anna M. T.; Jahoda, Andrew

    2009-01-01

    The last decades have seen increased emphasis on the quality of training for direct-care staff serving people with intellectual disabilities. Nevertheless, it is unclear what the key aspects of effective training are. Therefore, the aim of the present meta-analysis was to establish the ingredients (i.e., goals, format, and techniques) for staff…

  20. Convergence and fluctuations of Regularized Tyler estimators

    KAUST Repository

    Kammoun, Abla

    2015-10-26

    This article studies the behavior of regularized Tyler estimators (RTEs) of scatter matrices. The key advantages of these estimators are twofold. First, they guarantee by construction a good conditioning of the estimate and second, being a derivative of robust Tyler estimators, they inherit their robustness properties, notably their resilience to the presence of outliers. Nevertheless, one major problem that poses the use of RTEs in practice is represented by the question of setting the regularization parameter p. While a high value of p is likely to push all the eigenvalues away from zero, it comes at the cost of a larger bias with respect to the population covariance matrix. A deep understanding of the statistics of RTEs is essential to come up with appropriate choices for the regularization parameter. This is not an easy task and might be out of reach, unless one considers asymptotic regimes wherein the number of observations n and/or their size N increase together. First asymptotic results have recently been obtained under the assumption that N and n are large and commensurable. Interestingly, no results concerning the regime of n going to infinity with N fixed exist, even though the investigation of this assumption has usually predated the analysis of the most difficult N and n large case. This motivates our work. In particular, we prove in the present paper that the RTEs converge to a deterministic matrix when n → ∞ with N fixed, which is expressed as a function of the theoretical covariance matrix. We also derive the fluctuations of the RTEs around this deterministic matrix and establish that these fluctuations converge in distribution to a multivariate Gaussian distribution with zero mean and a covariance depending on the population covariance and the parameter.