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Sample records for adjusted functional principal

  1. Functional Principal Components direction to cluster earthquake

    Adelfio, Giada; Chiodi, Marcello; D'Alessandro, Antonino; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia; Luzio, Dario

    2010-01-01

    Looking for curves similarity could be a complex issue characterized by subjective choices related to continuous transformations of observed discrete data (Chiodi, 1989). In this paper we combine the aim of finding clusters from a set of individual curves to the functional nature of data, applying a variant of a k-means algorithm based on the principal component rotation of data. We apply a classical clustering method to rotated data, according to the direction of maximum variance...

  2. Functional principal components analysis of workload capacity functions

    Burns, Devin M.; Houpt, Joseph W.; Townsend, James T.; Endres, Michael J.

    2013-01-01

    Workload capacity, an important concept in many areas of psychology, describes processing efficiency across changes in workload. The capacity coefficient is a function across time that provides a useful measure of this construct. Until now, most analyses of the capacity coefficient have focused on the magnitude of this function, and often only in terms of a qualitative comparison (greater than or less than one). This work explains how a functional extension of principal components analysis ca...

  3. Adjusting Population Risk for Functional Health Status.

    Fuller, Richard L; Hughes, John S; Goldfield, Norbert I

    2016-04-01

    Risk adjustment accounts for differences in population mix by reducing the likelihood of enrollee selection by managed care plans and providing a correction to otherwise biased reporting of provider or plan performance. Functional health status is not routinely included within risk-adjustment methods, but is believed by many to be a significant enhancement to risk adjustment for complex enrollees and patients. In this analysis a standardized measure of functional health was created using 3 different source functional assessment instruments submitted to the Medicare program on condition of payment. The authors use a 5% development sample of Medicare claims from 2006 and 2007, including functional health assessments, and develop a model of functional health classification comprising 9 groups defined by the interaction of self-care, mobility, incontinence, and cognitive impairment. The 9 functional groups were used to augment Clinical Risk Groups, a diagnosis-based patient classification system, and when using a validation set of 100% of Medicare data for 2010 and 2011, this study found the use of the functional health module to improve the fit of observed enrollee cost, measured by the R(2) statistic, by 5% across all Medicare enrollees. The authors observed complex nonlinear interactions across functional health domains when constructing the model and caution that functional health status needs careful handling when used for risk adjustment. The addition of functional health status within existing risk-adjustment models has the potential to improve equitable resource allocation in the financing of care costs for more complex enrollees if handled appropriately. (Population Health Management 2016;19:136-144). PMID:26348621

  4. Functional principal components analysis of workload capacity functions.

    Burns, Devin M; Houpt, Joseph W; Townsend, James T; Endres, Michael J

    2013-12-01

    Workload capacity, an important concept in many areas of psychology, describes processing efficiency across changes in workload. The capacity coefficient is a function across time that provides a useful measure of this construct. Until now, most analyses of the capacity coefficient have focused on the magnitude of this function, and often only in terms of a qualitative comparison (greater than or less than one). This work explains how a functional extension of principal components analysis can capture the time-extended information of these functional data, using a small number of scalar values chosen to emphasize the variance between participants and conditions. This approach provides many possibilities for a more fine-grained study of differences in workload capacity across tasks and individuals. PMID:23475829

  5. Adjusting the IP $\\beta$ Functions in RHIC

    Wittmer, W; Pilat, F; Ptitsyn, V; Van Zeijts, J

    2004-01-01

    The beta functions at the IP can be adjusted without perturbation of other optics functions via several approaches. In this paper we describe a scheme based on a vector knob, which assigns fixed values to the different tuning quadrupoles and scales them by a common multiplier. The values for the knob vector were calculated for a lattice without any errors using MADX. Previous studies for the LHC [1] have shown that this approach can meet the design goals. A specific feature of the RHIC lattice is the nested power supply system. To cope with the resulting problems a detailed response matrix analysis has been carried out and different sets of knobs were calculated and compared. The knobs were tested at RHIC during the 2004 run and preliminary results are discussed. Simultaneously a new approach to measure the beam sizes of both colliding beams at the IP, based on the tunability provided by the knobs, was developed and tested.

  6. Longitudinal functional principal component modelling via Stochastic Approximation Monte Carlo

    Martinez, Josue G.

    2010-06-01

    The authors consider the analysis of hierarchical longitudinal functional data based upon a functional principal components approach. In contrast to standard frequentist approaches to selecting the number of principal components, the authors do model averaging using a Bayesian formulation. A relatively straightforward reversible jump Markov Chain Monte Carlo formulation has poor mixing properties and in simulated data often becomes trapped at the wrong number of principal components. In order to overcome this, the authors show how to apply Stochastic Approximation Monte Carlo (SAMC) to this problem, a method that has the potential to explore the entire space and does not become trapped in local extrema. The combination of reversible jump methods and SAMC in hierarchical longitudinal functional data is simplified by a polar coordinate representation of the principal components. The approach is easy to implement and does well in simulated data in determining the distribution of the number of principal components, and in terms of its frequentist estimation properties. Empirical applications are also presented.

  7. Selecting the Number of Principal Components in Functional Data

    Li, Yehua

    2013-12-01

    Functional principal component analysis (FPCA) has become the most widely used dimension reduction tool for functional data analysis. We consider functional data measured at random, subject-specific time points, contaminated with measurement error, allowing for both sparse and dense functional data, and propose novel information criteria to select the number of principal component in such data. We propose a Bayesian information criterion based on marginal modeling that can consistently select the number of principal components for both sparse and dense functional data. For dense functional data, we also develop an Akaike information criterion based on the expected Kullback-Leibler information under a Gaussian assumption. In connecting with the time series literature, we also consider a class of information criteria proposed for factor analysis of multivariate time series and show that they are still consistent for dense functional data, if a prescribed undersmoothing scheme is undertaken in the FPCA algorithm. We perform intensive simulation studies and show that the proposed information criteria vastly outperform existing methods for this type of data. Surprisingly, our empirical evidence shows that our information criteria proposed for dense functional data also perform well for sparse functional data. An empirical example using colon carcinogenesis data is also provided to illustrate the results. Supplementary materials for this article are available online. © 2013 American Statistical Association.

  8. Executive functions, depressive symptoms, and college adjustment in women.

    Wingo, Jana; Kalkut, Erica; Tuminello, Elizabeth; Asconape, Josefina; Han, S Duke

    2013-01-01

    Many students have difficulty adjusting to college, and the contribution of academic and relational factors have been considered in previous research. In particular, depression commonly emerges among college women at this time and could be related to poor adjustment to college. This study examined the relationship between executive functions, depressive symptoms, and college adjustment in college women. Seventy-seven female participants from a midsize urban university completed the Wechsler Abbreviated Scale of Intelligence, College Adjustment Scale, Beck Depression Inventory-Second Edition, Behavior Rating Inventory of Executive Function-Adult Version, and four subtests from the Delis-Kaplan Executive Function System: the Trail-Making Test, Design Fluency Test, Verbal Fluency Test, and Color-Word Interference Test. After controlling for IQ score, hierarchical regression analyses showed that subjective and objective measures of executive functioning and depressive symptoms were significantly related to college adjustment problems in academic, relational, and psychological areas. The current study provides evidence for a relationship between cognitive abilities, psychiatric symptoms, and college adjustment. PMID:23397999

  9. Applications of sensitivity function to dosimetric data adjustments

    Sensitivity functions are applied to the dosimetric field in the spectrum unfolding technique, also called as the data adjustment technique which are statistical estimation procedures of the neutron spectrum or relating dosimetric quantities basing on the reaction-rate data measurements. Using the practical formulae and numerical examples of the sensitivity functions in the dosimetric data adjustments, two comments are made that (1) present sensitivity values are highly depending on the initial spectrum inputs and (2) more attention should be paid to the dependency of the sensitivity on the very uncertain covariance data inputs of the initial neutron spectrum. (author)

  10. Marital Adjustment, Parental Functioning, and Emotional Sharing in War Veterans

    Solomon, Zahava; Debby-Aharon, Shimrit; Zerach, Gadi; Horesh, Danny

    2011-01-01

    The current study aimed to examine the implications of posttraumatic stress disorder symptoms and emotional sharing in marital adjustment and parental functioning among Israeli veterans of the 1982 Lebanon War. The sample consisted of combat stress reaction (CSR) veterans (n = 264) and non-CSR veterans (n = 209). Results show that traumatized…

  11. Evaluation of adjustment functions in a heuristic algorithm

    At present the techniques of evolution al computation receive an increasing attention in the scientific and technological areas. This situation is due to its enormous potential in the optimization applied to problems of discussed computational complexity. In the nuclear area these techniques are used in diverse problems of combinatory optimization related with designing cores of power reactors. A distinctive characteristic of the evolution al and/or meta-heuristic algorithms is that appeal in each one from their applications to an adjustment function, fitness or of quality. This function allows to discriminate or to evaluate potentials solutions of the problem to solve. The definition of this situation is very important since it allows following the search of the algorithm toward different regions of the search space. In this work the impact that has the election of this function in the quality of the found solution is shown. The optimization technique by ant colonies or Acs (ant colony system) was used applied to the radial design of fuel cells for a boiling water power reactor. The notable results of the Acs allowed to propose the adjustment method of the importance and with this to obtain adjustment functions that guide the search of solutions of collective algorithms efficiently, basic capacity to develop the proposal of emulation of the natural selection and to investigate the possibility that on order of specify goals, to obtain the corresponding decision variables. A variety of re tro-exit (re tro-out) complementary process of feedback (re tro-in) that opens extended application perspectives of be feasible. (Author)

  12. Morphology and function in the empirical analysis of reading adjustment

    Carpio, Claudio

    2010-06-01

    Full Text Available The present study evaluated the effects of varying the criterion and the morphology of the percentage of correct response upon reading adjustment tasks. Participants were 20 voluntary students, distributed in four groups, which were differentiated by the certainty - variability of the criterion and the certainty - variability of the morphology of response to satisfy the criterion. All participants were exposed to a first evaluation, training and finally a second evaluation similar to the first one was applied. Results question the role of morphology as a comprehension strategy independent of a functional criterion, domain and of the text itself

  13. Will carbon motivated border tax adjustments function as a threat?

    Due to large incremental carbon emissions, China might become an important target country of CBTA (carbon motivated border tax adjustments). To levy CBTA could reduce China’s emissions. Meanwhile, China’s emissions reduction could also be achieved by China’s climate policies (termed as CBTA-emissions-equivalent policies). This paper contributes to the discussion on CBTA by comparing the potential regional effects of CBTA and CBTA-emissions-equivalent policies. The main findings are as follows: (1) CBTA and CBTA-emissions-equivalent policies would result in relocations of outputs across regions and countries, affect the structure of economy and contribute to world’s emissions reduction. (2) There would be significant differences in the regional effects between CBTA and CBTA-emissions-equivalent policies. (3) Compared to carbon tax, CBTA would be a costly and inefficient policy instrument to reduce emissions, but could function as an effective coercion strategy. (4) These policies would result in competitiveness issue and rebound effects, wherein different countries would be affected differently. China is a large economy and energy consumer with high openness to international trade. Looking ahead, the Chinese government should consider the potential interactions between China and other economies when designing tax reforms. - Highlights: ►We compare regional effects of CBTA (carbon motivated border tax adjustments) and CBTA-emissions-equivalent policies. ► We explore the interactions between China and other economies. ► We investigate the potential international externalities and their effects across countries.

  14. Adjustment of the set of imperfect data to principal component and factor analysis. The case of Auger spectra

    Siuda, R.; Balcerowska, G.; Rozwadowski, M. [Institute of Matematics and Physics, University of Technology and Agriculture, Bydgoszcz (Poland); Chojnacki, S. [Faculty of Telekomunication and Electrical Engineering, University of Technology and Agriculture, Bydgoszcz (Poland); Aberdam, D. [Laboratoire de Crystallographie, CNRS, Grenoble (France)

    1998-12-31

    Any set of digitized signals, coming from an instrument that reveals untraceable scale of the quantity used for displaying of the signal records, can be analysed with neither principal component analysis (PCA) nor factor analysis (FA). The paper presents a method for numerical treatment of directly measured signals. The method allows to improve the structure of the data set so that they fit the requirements of PCA or FA. Both instrumental imperfections and the proposed treatment of directly measured signals are illustrated with a set of Auger spectra recorded during cleaning of contaminated Ag(110) surface with Ar ions. (author) 7 refs, 7 figs, 3 tabs

  15. Adjustment of the set of imperfect data to principal component and factor analysis. The case of Auger spectra

    Any set of digitized signals, coming from an instrument that reveals untraceable scale of the quantity used for displaying of the signal records, can be analysed with neither principal component analysis (PCA) nor factor analysis (FA). The paper presents a method for numerical treatment of directly measured signals. The method allows to improve the structure of the data set so that they fit the requirements of PCA or FA. Both instrumental imperfections and the proposed treatment of directly measured signals are illustrated with a set of Auger spectra recorded during cleaning of contaminated Ag(110) surface with Ar ions. (author)

  16. Assessment of models for pedestrian dynamics with functional principal component analysis

    Chraibi, Mohcine; Ensslen, Tim; Gottschalk, Hanno; Saadi, Mohamed; Seyfried, Armin

    2016-06-01

    Many agent based simulation approaches have been proposed for pedestrian flow. As such models are applied e.g. in evacuation studies, the quality and reliability of such models is of vital interest. Pedestrian trajectories are functional data and thus functional principal component analysis is a natural tool to assess the quality of pedestrian flow models beyond average properties. In this article we conduct functional Principal Component Analysis (PCA) for the trajectories of pedestrians passing through a bottleneck. In this way it is possible to assess the quality of the models not only on basis of average values but also by considering its fluctuations. We benchmark two agent based models of pedestrian flow against the experimental data using PCA average and stochastic features. Functional PCA proves to be an efficient tool to detect deviation between simulation and experiment and to assess quality of pedestrian models.

  17. Modeling and prediction of children’s growth data via functional principal component analysis

    2009-01-01

    We use the functional principal component analysis(FPCA) to model and predict the weight growth in children.In particular,we examine how the approach can help discern growth patterns of underweight children relative to their normal counterparts,and whether a commonly used transformation to normality plays any constructive roles in a predictive model based on the FPCA.Our work supplements the conditional growth charts developed by Wei and He(2006) by constructing a predictive growth model based on a small number of principal components scores on individual’s past.

  18. Principal Component and Clustering Analysis of Functional Traits in Swiss Dairy Cattle

    Karacaören, Burak; Kadarmideen, Haja N.

    2008-01-01

    The objective of the research was to investigate the relationship among functional traits (body condition score (BCS), milk yield (MY), milking speed (MS), dry matter intake (DMI) and body weight (BW)). Data were from multiparous dairy cows (n = 55) of Chamau research farm of the Swiss Federal Institute of Technology, Switzerland. Principal component analysis with correlation matrix was used to find the relationship among BCS, MY, MS, DMI, BW, and other fixed effects including breed, year at ...

  19. Skeletal muscle mass adjusted by height correlated better with muscular functions than that adjusted by body weight in defining sarcopenia.

    Han, Der-Sheng; Chang, Ke-Vin; Li, Chia-Ming; Lin, Yu-Hong; Kao, Tung-Wei; Tsai, Keh-Sung; Wang, Tyng-Grey; Yang, Wei-Shiung

    2016-01-01

    Sarcopenia, characterized by low muscle mass and function, results in frailty, comorbidities and mortality. However, its prevalence varies according to the different criteria used in its diagnosis. This cross-sectional study investigated the difference in the number of sarcopenia cases recorded by two different measurement methods of low muscle mass to determine which measurement was better. We recruited 878 (54.2% female) individuals aged over 65 years and obtained their body composition and functional parameters. Low muscle mass was defined as two standard deviations below either the mean height-adjusted (hSMI) or weight-adjusted (wSMI) muscle mass of a young reference group. The prevalence of sarcopenia was 6.7% vs. 0.4% (male/female) by hSMI, and 4.0% vs. 10.7% (male/female) by wSMI. The κ coefficients for these two criteria were 0.39 vs. 0.03 (male/female), and 0.17 in all subjects. Serum myostatin levels correlated positively with gait speed (r = 0.142, p = 0.007) after adjustment for gender. hSMI correlated with grip strength, cardiopulmonary endurance, leg endurance, gait speed, and flexibility. wSMI correlated with grip strength, leg endurance, gait speed, and flexibility. Since hSMI correlated more closely with grip strength and more muscular functions, we recommend hSMI in the diagnosis of low muscle mass. PMID:26785759

  20. Functional Unfold Principal Component Regression Methodology for Analysis of Industrial Batch Process Data

    Mears, Lisa; Nørregaard, Rasmus; Sin, Gürkan;

    2016-01-01

    . It is shown that application of functional data analysis and the choice of variance scaling method have the greatest impact on the prediction accuracy. Considering the vast amount of batch process data continuously generated in industry, this methodology can potentially contribute as a tool to identify......This work proposes a methodology utilizing functional unfold principal component regression (FUPCR), for application to industrial batch process data as a process modeling and optimization tool. The methodology is applied to an industrial fermentation dataset, containing 30 batches of a production...

  1. Relativistic Nuclear Energy Density Functionals: adjusting parameters to binding energies

    Niksic, T; Ring, P

    2008-01-01

    We study a particular class of relativistic nuclear energy density functionals in which only nucleon degrees of freedom are explicitly used in the construction of effective interaction terms. Short-distance (high-momentum) correlations, as well as intermediate and long-range dynamics, are encoded in the medium (nucleon density) dependence of the strength functionals of an effective interaction Lagrangian. Guided by the density dependence of microscopic nucleon self-energies in nuclear matter, a phenomenological ansatz for the density-dependent coupling functionals is accurately determined in self-consistent mean-field calculations of binding energies of a large set of axially deformed nuclei. The relationship between the nuclear matter volume, surface and symmetry energies, and the corresponding predictions for nuclear masses is analyzed in detail. The resulting best-fit parametrization of the nuclear energy density functional is further tested in calculations of properties of spherical and deformed medium-he...

  2. Simulation of γ spectrum-shifting based on the parameter adjustment of Gaussian function space

    Based on the statistical characteristics of energy spectrum and the features of spectrum-shifting in spectrometry, the parameter adjustment method of Gaussian function space was applied in the simulation of spectrum-shifting. The transient characteristics of energy spectrum were described by the Gaussian function space, and then the Gaussian function space was transferred by parameter adjustment method. Furthermore, the spectrum-shifting in measurement of energy spectrum was simulated. The applied example shows that the parameters can be adjusted flexibly by this method to meet the various requirements in simulation of energy spectrum-shifting. This method was one parameterized simulation method with good performance for the practical application. (authors)

  3. Steep and Adjustable Transfer Functions of Monolithic SOA-EA 2R-Regenerators

    Öhman, Filip; Kjær, Rasmus; Christiansen, Lotte Jin;

    2006-01-01

    Measurements and numerical modeling of a reamplification and reshaping (2R) regenerator demonstrate a steep power transfer function with adjustable threshold. The threshold can be adjusted more than 6 dB by simple control of the reverse bias voltage of the absorber section. The device consists of...

  4. Quality Adjusted Cost Functions for Child Care Centers

    H. Naci Mocan

    1995-01-01

    Using a newly compiled data set, this paper estimates multi- product translog cost functions for 399 child care centers from California, Colorado, Connecticut, and North Carolina. Quality of child care is controlled by a quality index, which has been shown to be positively related to child outcomes by previous research. Nonprofit centers that receive public money, either from the state or federal government, (which is tied to higher standards), have total variable costs that are 18 percent hi...

  5. Adjusted functional boxplots for spatio-temporal data visualization and outlier detection

    Sun, Ying

    2011-10-24

    This article proposes a simulation-based method to adjust functional boxplots for correlations when visualizing functional and spatio-temporal data, as well as detecting outliers. We start by investigating the relationship between the spatio-temporal dependence and the 1.5 times the 50% central region empirical outlier detection rule. Then, we propose to simulate observations without outliers on the basis of a robust estimator of the covariance function of the data. We select the constant factor in the functional boxplot to control the probability of correctly detecting no outliers. Finally, we apply the selected factor to the functional boxplot of the original data. As applications, the factor selection procedure and the adjusted functional boxplots are demonstrated on sea surface temperatures, spatio-temporal precipitation and general circulation model (GCM) data. The outlier detection performance is also compared before and after the factor adjustment. © 2011 John Wiley & Sons, Ltd.

  6. Neurologic music therapy improves executive function and emotional adjustment in traumatic brain injury rehabilitation.

    Thaut, Michael H; Gardiner, James C; Holmberg, Dawn; Horwitz, Javan; Kent, Luanne; Andrews, Garrett; Donelan, Beth; McIntosh, Gerald R

    2009-07-01

    This study examined the immediate effects of neurologic music therapy (NMT) on cognitive functioning and emotional adjustment with brain-injured persons. Four treatment sessions were held, during which participants were given a pre-test, participated in 30 min of NMT that focused on one aspect of rehabilitation (attention, memory, executive function, or emotional adjustment), which was followed by post-testing. Control participants engaged in a pre-test, 30 min of rest, and then a post-test. Treatment participants showed improvement in executive function and overall emotional adjustment, and lessening of depression, sensation seeking, and anxiety. Control participants improved in emotional adjustment and lessening of hostility, but showed decreases in measures of memory, positive affect, and sensation seeking. PMID:19673815

  7. Oligopoly games with nonlinear demand and cost functions: Two boundedly rational adjustment processes

    We consider a Cournot oligopoly game, where firms produce an homogenous good and the demand and cost functions are nonlinear. These features make the classical best reply solution difficult to be obtained, even if players have full information about their environment. We propose two different kinds of repeated games based on a lower degree of rationality of the firms, on a reduced information set and reduced computational capabilities. The first adjustment mechanism is called 'Local Monopolistic Approximation' (LMA). First firms get the correct local estimate of the demand function and then they use such estimate in a linear approximation of the demand function where the effects of the competitors' outputs are ignored. On the basis of this subjective demand function they solve their profit maximization problem. By using the second adjustment process, that belongs to a class of adaptive mechanisms known in the literature as 'Gradient Dynamics' (GD), firms do not solve any optimization problem, but they adjust their production in the direction indicated by their (correct) estimate of the marginal profit. Both these repeated games may converge to a Cournot-Nash equilibrium, i.e. to the equilibrium of the best reply dynamics. We compare the properties of the two different dynamical systems that describe the time evolution of the oligopoly games under the two adjustment mechanisms, and we analyze the conditions that lead to non-convergence and complex dynamic behaviors. The paper extends the results of other authors that consider similar adjustment processes assuming linear cost functions or linear demand functions

  8. Body image and its relationship with sexual function and marital adjustment in infertile women

    Karamidehkordi, Akram; Roudsari, Robab Latifnejad

    2014-01-01

    Background: Body image is related to cognitive, emotional, and physical aspects of women's life. Therefore, it is expected to have an important role in women's sexual health and marital adjustment too. This issue seems to be salient in infertile women who suffer from psychological consequences of infertility. This study was conducted to investigate the relationship of body image with sexual function and marital adjustment in infertile women in 2011 in Mashhad, Iran. Materials and Methods: Thi...

  9. The Impact of Children with High-Functioning Autism on Parental Stress, Sibling Adjustment, and Family Functioning

    Rao, Patricia A.; Beidel, Deborah C.

    2009-01-01

    The article discuses a study conducted to investigate the impact of children with high-functioning autism (HFA) on parental stress, sibling adjustment, and family functioning; the study involves a sample of parents of 15 children with HFA and parents of 15 matched control children who completed questionnaires measuring the dependent variables. The…

  10. Effect of cover adjustment on binocular vision function in children with anisometropic amblyopia

    Kai Zhu

    2016-01-01

    AIM:To explore and study the effect of cover adjustment on binocular visual function in children with anisometropic amblyopia.METHODS: Forty-five children with anisometropic amblyopia of our hospital from July 2014 to April 2015 were as the study group, and treated by cover adjustment. Then 40 cases of healthy volunteers were selected as the blank control group. The binocular visual function of the subjects was observed.RESULTS: Before treatments, at 1 and 3mo after treatments, the positive r...

  11. Pediatric cardiac MRI: automated left-ventricular volumes and function analysis and effects of manual adjustments

    Hammon, Matthias; Janka, Rolf; Dankerl, Peter; Kammerer, Ferdinand J.; Uder, Michael; Rompel, Oliver [University Hospital Erlangen, Department of Radiology, Erlangen (Germany); Gloeckler, Martin; Dittrich, Sven [University Hospital Erlangen, Department of Pediatric Cardiology, Erlangen (Germany)

    2015-05-01

    Cardiac MRI is an accurate and reproducible technique for the assessment of left ventricular volumes and function. The accuracy of automated segmentation and the effects of manual adjustments have not been determined in children. To evaluate automated segmentation and the effects of manual adjustments for left ventricular parameter quantification in pediatric cardiac MR images. Left ventricular parameters were evaluated in 45 children with suspected myocarditis (age 13.4 ± 3.5 years, range 4-17 years) who underwent cardiac MRI. Dedicated software was used to automatically segment and adjust the parameters. Results of end-diastolic volume, end-systolic volume, stroke volume, myocardial mass, and ejection fraction were documented before and after apex/base adjustment and after apex/base/myocardial contour adjustment. The software successfully detected the left ventricle in 42 of 45 (93.3%) children; failures occurred in the smallest and youngest children. Of those 42 children, automatically segmented end-diastolic volume (EDV) was 151 ± 47 ml, and after apex/base adjustment it was 146 ± 45 ml, after apex/base/myocardial contour adjustment 146 ± 45 ml. The corresponding results for end-systolic volume (ESV) were 66 ± 32 ml, 63 ± 29 ml and 64 ± 28 ml; for stroke volume (SV) they were 85 ± 25 ml, 83 ± 23 ml and 83 ± 23 ml; for ejection fracture (EF) they were 57 ± 10%, 58 ± 9% and 58 ± 9%, and for myocardial mass (MM) they were 104 ± 31 g, 95 ± 31 g and 94 ± 30 g. Statistically significant differences were found when comparing the EDV/ESV/MM results, the EF results after apex/base adjustment and after apex/base/myocardial contour adjustment and the SV results (except for comparing the SVs after apex/base adjustment and after apex/base/myocardial contour adjustment). Automated segmentation for the evaluation of left ventricular parameters in pediatric MR images proved to be feasible. Automated segmentation + apex/base adjustment provided clinically

  12. Pediatric cardiac MRI: automated left-ventricular volumes and function analysis and effects of manual adjustments

    Cardiac MRI is an accurate and reproducible technique for the assessment of left ventricular volumes and function. The accuracy of automated segmentation and the effects of manual adjustments have not been determined in children. To evaluate automated segmentation and the effects of manual adjustments for left ventricular parameter quantification in pediatric cardiac MR images. Left ventricular parameters were evaluated in 45 children with suspected myocarditis (age 13.4 ± 3.5 years, range 4-17 years) who underwent cardiac MRI. Dedicated software was used to automatically segment and adjust the parameters. Results of end-diastolic volume, end-systolic volume, stroke volume, myocardial mass, and ejection fraction were documented before and after apex/base adjustment and after apex/base/myocardial contour adjustment. The software successfully detected the left ventricle in 42 of 45 (93.3%) children; failures occurred in the smallest and youngest children. Of those 42 children, automatically segmented end-diastolic volume (EDV) was 151 ± 47 ml, and after apex/base adjustment it was 146 ± 45 ml, after apex/base/myocardial contour adjustment 146 ± 45 ml. The corresponding results for end-systolic volume (ESV) were 66 ± 32 ml, 63 ± 29 ml and 64 ± 28 ml; for stroke volume (SV) they were 85 ± 25 ml, 83 ± 23 ml and 83 ± 23 ml; for ejection fracture (EF) they were 57 ± 10%, 58 ± 9% and 58 ± 9%, and for myocardial mass (MM) they were 104 ± 31 g, 95 ± 31 g and 94 ± 30 g. Statistically significant differences were found when comparing the EDV/ESV/MM results, the EF results after apex/base adjustment and after apex/base/myocardial contour adjustment and the SV results (except for comparing the SVs after apex/base adjustment and after apex/base/myocardial contour adjustment). Automated segmentation for the evaluation of left ventricular parameters in pediatric MR images proved to be feasible. Automated segmentation + apex/base adjustment provided clinically

  13. Oligopoly games with nonlinear demand and cost functions: Two boundedly rational adjustment processes

    Naimzada, Ahmad K. [Department of Economics, University of Milan, Bicocca (Italy)]. E-mail: ahmad.naimzada@unimib.it; Sbragia, Lucia [Department of Economics, University of Urbino (Italy)]. E-mail: l.sbragia@uniurb.it

    2006-08-15

    We consider a Cournot oligopoly game, where firms produce an homogenous good and the demand and cost functions are nonlinear. These features make the classical best reply solution difficult to be obtained, even if players have full information about their environment. We propose two different kinds of repeated games based on a lower degree of rationality of the firms, on a reduced information set and reduced computational capabilities. The first adjustment mechanism is called 'Local Monopolistic Approximation' (LMA). First firms get the correct local estimate of the demand function and then they use such estimate in a linear approximation of the demand function where the effects of the competitors' outputs are ignored. On the basis of this subjective demand function they solve their profit maximization problem. By using the second adjustment process, that belongs to a class of adaptive mechanisms known in the literature as 'Gradient Dynamics' (GD), firms do not solve any optimization problem, but they adjust their production in the direction indicated by their (correct) estimate of the marginal profit. Both these repeated games may converge to a Cournot-Nash equilibrium, i.e. to the equilibrium of the best reply dynamics. We compare the properties of the two different dynamical systems that describe the time evolution of the oligopoly games under the two adjustment mechanisms, and we analyze the conditions that lead to non-convergence and complex dynamic behaviors. The paper extends the results of other authors that consider similar adjustment processes assuming linear cost functions or linear demand functions.

  14. Course and Severity of Maternal Depression: Associations with Family Functioning and Child Adjustment

    Foster, Cynthia Ewell; Webster, Melissa C.; Weissman, Myrna M.; Pilowsky, Daniel J.; Wickramaratne, Priya J.; Rush, A. John; Hughes, Carroll W.; Garber, Judy; Malloy, Erin; Cerda, Gabrielle; Kornstein, Susan G.; Alpert, Jonathan E.; Wisniewski, Stephen R.; Trivedi, Madhukar H.; Fava, Maurizio; King, Cheryl A.

    2008-01-01

    Number of lifetime episodes, duration of current episode, and severity of maternal depression were investigated in relation to family functioning and child adjustment. Participants were the 151 mother-child pairs in the Sequenced Treatment Alternatives to Relieve Depression (STAR*D) child multi-site study. Mothers were diagnosed with Major…

  15. Youths with ADHD with and without Tic Disorders: Comorbid Psychopathology, Executive Function and Social Adjustment

    Lin, Yu-Ju; Lai, Meng-Chuan; Gau, Susan Shur-Fen

    2012-01-01

    Attention deficit/hyperactivity disorder (ADHD) and tic disorders (TD) commonly co-occur. Clarifying the psychiatric comorbidities, executive functions and social adjustment difficulties in children and adolescents of ADHD with and without TD is informative to understand the developmental psychopathology and to identify their specific clinical…

  16. In Vitro Fertilization and the Family: Quality of Parenting, Family Functioning, and Child Psychosocial Adjustment.

    Hahn, Chun-Shin; DiPietro, Janet A.

    2001-01-01

    Examined associations between in vitro fertilization (IVF) and parenting quality, family functioning, and emotional/behavioral adjustment of 3- to 7-year-olds. Found that IVF mothers reported greater protectiveness than mothers of naturally conceived children. Teachers rated IVF mothers as displaying greater warmth but not overprotective or…

  17. Executive Functioning and School Adjustment: The Mediational Role of Pre-kindergarten Learning-related Behaviors

    Sasser, Tyler R.; Bierman, Karen L.; Heinrichs, Brenda

    2016-01-01

    164 four-year-old children (14% Latino American, 30% African American, 56% European American; 57% girls) in 22 Head Start classrooms were followed through third grade. Growth curve models were used to estimate the predictive associations between pre-kindergarten executive function (EF) skills and trajectories of academic skill development (math, literacy, overall academic functioning) and social-emotional adjustment at school (social competence, aggression), controlling for child sex, race, verbal IQ, and pre-kindergarten baseline scores. Direct developmental pathways were examined, along with indirect pathways, in which the association between preschool EF and elementary school adjustment was mediated by classroom learning behaviors. Preschool EF significantly predicted later math skills, academic functioning, and social competence, and marginally predicted later literacy skills. Preschool learning behaviors fully mediated the association between EF and later literacy skills and social competence, but did not mediate associations between EF and later math skills or academic functioning. Implications for developmental theory and early education are discussed.

  18. Modeling and Individualization of Head-Related Transfer Functions Using Principal Component Analysis

    Fink, Kimberly J.

    Spatial localization of sound depends on interaural time delay (ITD), level difference, and on the interaction of the source with the head, torso, and pinna. Head-related transfer functions (HRTFs) model the dynamics that are used by listeners to derive spatial information from binaural signals and are used to create virtual auditory displays (VADs). This thesis presents methods to model and customize HRTFs for the creation of a tunable VAD. Prior research has investigated development of virtual auditory displays (VADs) using models of HRTFs as a function of a finite number of principal components (PCs) and associated weights (PCWs). This thesis investigates the effect of PCWs on horizontal plane HRTFs derived from a database of head-related impulse responses (HRIRs). Tuning is evaluated from a numerical perspective to determine how variation of PCWs from an average PC model affects HRTF spectral characteristics. A PC model of an average subject at 50 azimuths in the horizontal plane is developed from HRIRs of 34 subjects from a public database. An additional nine subjects are used to test the PC model and conduct three optimization experiments, in which a cost function of spectral distortion is minimized by sequentially tuning PCWs. These experiments show that error deriving from PC model truncation can be reduced and average HRTFs can be tuned to match individual HRTFs. Model order reduction is used to reduce the dimensionality of a VAD from 200 point FIR filters for each ear to 15th order IIR filters per ear, without introducing audible differences. Subject testing evaluated the performance of the tuning. First the subject listens to a known azimuth and tunes sliders related to the PCWs and ITD so that what they are hearing sound like the given azimuth. On a later day, azimuths are presented in a random order unknown to the subject and he or she is asked to make judgments about where they perceive the sound. The tuned PCWs are interpolated to obtain customized

  19. Executive Functioning and School Adjustment: The Mediational Role of Pre-kindergarten Learning-related Behaviors

    Sasser, Tyler R.; Bierman, Karen L.; Heinrichs, Brenda

    2015-01-01

    164 four-year-old children (14% Latino American, 30% African American, 56% European American; 57% girls) in 22 Head Start classrooms were followed through third grade. Growth curve models were used to estimate the predictive associations between pre-kindergarten executive function (EF) skills and trajectories of academic skill development (math, literacy, overall academic functioning) and social-emotional adjustment at school (social competence, aggression), controlling for child sex, race, v...

  20. Quality Adjusted Cost Function in Japanese Child Care Market: Evidence from Micro-level Data

    Shimizutani, Satoshi; NOGUCHI Haruko

    2003-01-01

    This is the first study that uses facility-level data to evaluate the cost efficiency of the child care market in Japan after controlling for quality of services. Japanese households in urban areas suffer from a severe undersupply of child care, and inefficient operation in public centers is allegedly responsible for the bottleneck. We take advantage of our unique and unusually rich data set on Japan's child care centers collected in summer 2002. We estimate quality-adjusted cost functions to...

  1. Adjustable grazing incidence x-ray optics: measurement of actuator influence functions and comparison with modeling

    Cotroneo, Vincenzo; Davis, William N.; Reid, Paul B.; Schwartz, Daniel A.; Trolier-McKinstry, Susan; Wilke, Rudeger H. T.

    2011-09-01

    The present generation of X-ray telescopes emphasizes either high image quality (e.g. Chandra with sub-arc second resolution) or large effective area (e.g. XMM-Newton), while future observatories under consideration (e.g. Athena, AXSIO) aim to greatly enhance the effective area, while maintaining moderate (~10 arc-seconds) image quality. To go beyond the limits of present and planned missions, the use of thin adjustable optics for the control of low-order figure error is needed to obtain the high image quality of precisely figured mirrors along with the large effective area of thin mirrors. The adjustable mirror prototypes under study at Smithsonian Astrophysical Observatory are based on two different principles and designs: 1) thin film lead-zirconate-titanate (PZT) piezoelectric actuators directly deposited on the mirror back surface, with the strain direction parallel to the glass surface (for sub-arc-second angular resolution and large effective area), and 2) conventional leadmagnesium- niobate (PMN) electrostrictive actuators with their strain direction perpendicular to the mirror surface (for 3-5 arc second resolution and moderate effective area). We have built and operated flat test mirrors of these adjustable optics. We present the comparison between theoretical influence functions as obtained by finite element analysis and the measured influence functions obtained from the two test configurations.

  2. Rapid adjustment of bird community compositions to local climatic variations and its functional consequences.

    Gaüzère, Pierre; Jiguet, Frédéric; Devictor, Vincent

    2015-09-01

    The local spatial congruence between climate changes and community changes has rarely been studied over large areas. We proposed one of the first comprehensive frameworks tracking local changes in community composition related to climate changes. First, we investigated whether and how 12 years of changes in the local composition of bird communities were related to local climate variations. Then, we tested the consequences of this climate-induced adjustment of communities on Grinnellian (habitat-related) and Eltonian (function-related) homogenization. A standardized protocol monitoring spatial and temporal trends of birds over France from 2001 to 2012 was used. For each plot and each year, we used the spring temperature and the spring precipitations and calculated three indices reflecting the thermal niche, the habitat specialization, and the functional originality of the species within a community. We then used a moving-window approach to estimate the spatial distribution of the temporal trends in each of these indices and their congruency with local climatic variations. Temperature fluctuations and community dynamics were found to be highly variable in space, but their variations were finely congruent. More interestingly, the community adjustment to temperature variations was nonmonotonous. Instead, unexplained fluctuations in community composition were observed up to a certain threshold of climate change intensity, above which a change in community composition was observed. This shift corresponded to a significant decrease in the relative abundance of habitat specialists and functionally original species within communities, regardless of the direction of temperature change. The investigation of variations in climate and community responses appears to be a central step toward a better understanding of climate change effects on biodiversity. Our results suggest a fine-scale and short-term adjustment of community composition to temperature changes. Moreover

  3. Application of empirical orthogonal functions or principal component analysis to environmental variability data

    An EOF analysis or principal component analysis (PC) was made for monthly precipitation (1972-1998) using 50 stations, and for monthly rate of flow (1951-2000) at 8 stations in the Valle del Cauca state, Colombia. Previously, we had applied 5 measures in order to verify the convenience of the analysis. These measures were: i) evaluation of significance level of correlation between variables; II) the kaiser-Meyer-Oikin (KMO) test; III) the Bartlett sphericity test; (IV) the measurement of sample adequacy (MSA), and v) the percentage of non-redundant residues with absolute values>0.05. For the selection of the significant PCS in every set of variables we applied seven criteria: the graphical method, the explained variance percentage, the mean root, the tests of Velicer, Bartlett, Broken Stich and the cross validation test. We chose the latter as the best one. It is robust and quantitative. Precipitation stations were divided in three homogeneous groups, applying a hierarchical cluster analysis, which was verified through the geographic method and the discriminate analysis for the first four EOFs of precipitation. There are many advantages to the EOF method: reduction of the dimensionality of multivariate data, calculation of missing data, evaluation and reduction of multi-co linearity, building of homogeneous groups, and detection of outliers. With the first four principal components we can explain 60.34% of the total variance of monthly precipitation for the Valle del Cauca state, and 94% of the total variance for the selected records of rates of flow

  4. Using Green's Functions to initialize and adjust a global, eddying ocean biogeochemistry general circulation model

    Brix, H.; Menemenlis, D.; Hill, C.; Dutkiewicz, S.; Jahn, O.; Wang, D.; Bowman, K.; Zhang, H.

    2015-11-01

    The NASA Carbon Monitoring System (CMS) Flux Project aims to attribute changes in the atmospheric accumulation of carbon dioxide to spatially resolved fluxes by utilizing the full suite of NASA data, models, and assimilation capabilities. For the oceanic part of this project, we introduce ECCO2-Darwin, a new ocean biogeochemistry general circulation model based on combining the following pre-existing components: (i) a full-depth, eddying, global-ocean configuration of the Massachusetts Institute of Technology general circulation model (MITgcm), (ii) an adjoint-method-based estimate of ocean circulation from the Estimating the Circulation and Climate of the Ocean, Phase II (ECCO2) project, (iii) the MIT ecosystem model "Darwin", and (iv) a marine carbon chemistry model. Air-sea gas exchange coefficients and initial conditions of dissolved inorganic carbon, alkalinity, and oxygen are adjusted using a Green's Functions approach in order to optimize modeled air-sea CO2 fluxes. Data constraints include observations of carbon dioxide partial pressure (pCO2) for 2009-2010, global air-sea CO2 flux estimates, and the seasonal cycle of the Takahashi et al. (2009) Atlas. The model sensitivity experiments (or Green's Functions) include simulations that start from different initial conditions as well as experiments that perturb air-sea gas exchange parameters and the ratio of particulate inorganic to organic carbon. The Green's Functions approach yields a linear combination of these sensitivity experiments that minimizes model-data differences. The resulting initial conditions and gas exchange coefficients are then used to integrate the ECCO2-Darwin model forward. Despite the small number (six) of control parameters, the adjusted simulation is significantly closer to the data constraints (37% cost function reduction, i.e., reduction in the model-data difference, relative to the baseline simulation) and to independent observations (e.g., alkalinity). The adjusted air-sea gas

  5. On Equiconvergence of Expansions in Trigonometric Fourier Series and in Principal Functions of Ordinary Differential Operators

    Vagabov, A. I.

    1985-06-01

    A regularity concept is given for ordinary differential pencils of a general form in a space of vector-valued functions, and this concept is subjected to analysis. Theorems are established asserting that the Fourier series of an arbitrary vector-valued function in the system of eigenelements of the pencils is equiconvergent with the usual trigonometric Fourier series of the components of this vector-valued function. Bibliography: 7 titles.

  6. The role of executive function in children's competent adjustment to middle school.

    Jacobson, Lisa A; Williford, Amanda P; Pianta, Robert C

    2011-01-01

    Executive function (EF) skills play an important role in children's cognitive and social functioning. These skills develop throughout childhood, concurrently with a number of developmental transitions and challenges. One of these challenges is the transition from elementary into middle-level schools, which has the potential to significantly disrupt children's academic and social trajectories. However, little is known about the role of EF in children's adjustment during this transition. This study investigated the relation between children's EF skills, assessed both before and during elementary school, and sixth grade academic and social competence. In addition, the influences of the type of school setting attended in sixth grade on children's academic and behavioral outcomes were examined. EF assessed prior to and during elementary school significantly predicted sixth grade competence, as rated by teachers and parents, in both academic and social domains, after controlling for background characteristics. The interactions between type of school setting and EF skills were significant: Parents tended to report more behavioral problems and less regulatory control in children with weaker EF skills who were attending middle school. In contrast, teachers reported greater academic and behavioral difficulty in students with poorer EF attending elementary school settings. In conclusion, children's performance-based EF skills significantly affect adjustment to the academic and behavioral demands of sixth grade, with parent report suggesting greater difficulty for children with poorer EF in settings where children are provided with less external supports (e.g., middle school). PMID:21246422

  7. Principal Stratification in Causal Inference

    Frangakis, Constantine E.; Rubin, Donald B.

    2002-01-01

    Many scientific problems require that treatment comparisons be adjusted for posttreatment variables, but the estimands underlying standard methods are not causal effects. To address this deficiency, we propose a general framework for comparing treatments adjusting for posttreatment variables that yields principal effects based on principal stratification. Principal stratification with respect to a posttreatment variable is a cross-classification of subjects defined by the joint potential valu...

  8. A Principal Components Analysis of Executive Processes: Exploring the Structure of Executive Functions using Neuropsychological Tests

    Maner, Safir

    2011-01-01

    Whether executive system is a unified or separable structure is still a matter of debate. Using an individual differences approach, this study investigated the structure of five hypothesized executive functions (“Updating”, “Shifting,” “Inhibition”, “Dual-Tasking” and “Planning”) and their relationship to “Intelligence”. The separability of these executive functions was explored. Ten neuropsychological tests were administered to young and healthy participants (N =103). Correlations between t...

  9. Adjustment of Born-Oppenheimer electronic wave functions to simplify close coupling calculations.

    Buenker, Robert J; Liebermann, Heinz-Peter; Zhang, Yu; Wu, Yong; Yan, Lingling; Liu, Chunhua; Qu, Yizhi; Wang, Jianguo

    2013-04-30

    Technical problems connected with use of the Born-Oppenheimer clamped-nuclei approximation to generate electronic wave functions, potential energy surfaces (PES), and associated properties are discussed. A computational procedure for adjusting the phases of the wave functions, as well as their order when potential crossings occur, is presented which is based on the calculation of overlaps between sets of molecular orbitals and configuration interaction eigenfunctions obtained at neighboring nuclear conformations. This approach has significant advantages for theoretical treatments describing atomic collisions and photo-dissociation processes by means of ab initio PES, electronic transition moments, and nonadiabatic radial and rotational coupling matrix elements. It ensures that the electronic wave functions are continuous over the entire range of nuclear conformations considered, thereby greatly simplifying the process of obtaining the above quantities from the results of single-point Born-Oppenheimer calculations. The overlap results are also used to define a diabatic transformation of the wave functions obtained for conical intersections that greatly simplifies the computation of off-diagonal matrix elements by eliminating the need for complex phase factors. PMID:23345171

  10. Principal stratification in causal inference.

    Frangakis, Constantine E; Rubin, Donald B

    2002-03-01

    Many scientific problems require that treatment comparisons be adjusted for posttreatment variables, but the estimands underlying standard methods are not causal effects. To address this deficiency, we propose a general framework for comparing treatments adjusting for posttreatment variables that yields principal effects based on principal stratification. Principal stratification with respect to a posttreatment variable is a cross-classification of subjects defined by the joint potential values of that posttreatment variable tinder each of the treatments being compared. Principal effects are causal effects within a principal stratum. The key property of principal strata is that they are not affected by treatment assignment and therefore can be used just as any pretreatment covariate. such as age category. As a result, the central property of our principal effects is that they are always causal effects and do not suffer from the complications of standard posttreatment-adjusted estimands. We discuss briefly that such principal causal effects are the link between three recent applications with adjustment for posttreatment variables: (i) treatment noncompliance, (ii) missing outcomes (dropout) following treatment noncompliance. and (iii) censoring by death. We then attack the problem of surrogate or biomarker endpoints, where we show, using principal causal effects, that all current definitions of surrogacy, even when perfectly true, do not generally have the desired interpretation as causal effects of treatment on outcome. We go on to forrmulate estimands based on principal stratification and principal causal effects and show their superiority. PMID:11890317

  11. Mature granule cells of the dentate gyrus-Passive bystanders or principal performers in hippocampal function?

    Lopez-Rojas, Jeffrey; Kreutz, Michael R

    2016-05-01

    The dentate gyrus is the main entrance of highly processed information to the hippocampus which derives from associative cortices and it is one of the few privileged areas in the brain where adult neurogenesis occurs. This creates the unique situation that neurons of diverse maturation stages are part of one neuronal network at any given point in life. While recently adult-born cells have a low induction threshold for long-term potentiation several studies suggest that following maturation granule cells are poorly excitable and they exhibit reduced Hebbian synaptic plasticity to an extent that it was even suggested that they functionally retire. Here, we review the functional properties of mature granule cells and discuss how plasticity of intrinsic excitability and alterations in excitation-inhibition balance might impact on their role in hippocampal information processing. PMID:26949226

  12. Principal Component Analysis of the Time- and Position-Dependent Point Spread Function of the Advanced Camera for Surveys

    Jee, M J; Sirianni, M; Martel, A R; White, R L; Ford, H C

    2007-01-01

    We describe the time- and position-dependent point spread function (PSF) variation of the Wide Field Channel (WFC) of the Advanced Camera for Surveys (ACS) with the principal component analysis (PCA) technique. The time-dependent change is caused by the temporal variation of the $HST$ focus whereas the position-dependent PSF variation in ACS/WFC at a given focus is mainly the result of changes in aberrations and charge diffusion across the detector, which appear as position-dependent changes in elongation of the astigmatic core and blurring of the PSF, respectively. Using >400 archival images of star cluster fields, we construct a ACS PSF library covering diverse environments of the $HST$ observations (e.g., focus values). We find that interpolation of a small number ($\\sim20$) of principal components or ``eigen-PSFs'' per exposure can robustly reproduce the observed variation of the ellipticity and size of the PSF. Our primary interest in this investigation is the application of this PSF library to precision...

  13. Principal Component Analysis of the Time- and Position-dependent Point-Spread Function of the Advanced Camera for Surveys

    Jee, M. J.; Blakeslee, J. P.; Sirianni, M.; Martel, A. R.; White, R. L.; Ford, H. C.

    2007-12-01

    We describe the time- and position-dependent point-spread function (PSF) variation of the wide-field channel (WFC) of the Advanced Camera for Surveys (ACS) with the principal component analysis (PCA) technique. The time-dependent change is caused by the temporal variation of the HST focus, whereas the position-dependent PSF variation in ACS WFC at a given focus is mainly the result of changes in aberrations and charge diffusion across the detector, which appear as position-dependent changes in the elongation of the astigmatic core and blurring of the PSF, respectively. Using ˜ 20 ) of principal components or "eigen-PSFs" per exposure can robustly reproduce the observed variation of the ellipticity and size of the PSF. Our primary interest in this investigation is the application of this PSF library to precision weak-lensing analyses, where accurate knowledge of the instrument's PSF is crucial. However, the high fidelity of the model judged from the nice agreement with observed PSFs suggests that the model is potentially also useful in other applications, such as crowded field stellar photometry, galaxy profile fitting, AGN studies, etc., which similarly demand a fair knowledge of the PSFs at objects' locations. Our PSF models, applicable to any WFC image rectified with the Lanczos3 kernel, are publicly available.

  14. Econometric estimation of investment utilization, adjustment costs, and technical efficiency in Danish pig farms using hyperbolic distance functions

    Henningsen, Arne; Fabricius, Ole; Olsen, Jakob Vesterlund

    2014-01-01

    Based on a theoretical microeconomic model, we econometrically estimate investment utilization, adjustment costs, and technical efficiency in Danish pig farms based on a large unbalanced panel dataset. As our theoretical model indicates that adjustment costs are caused both by increased inputs and...... by reduced outputs, we estimate hyperbolic distance functions that account for reduced technical efficiency both in terms of increased inputs and reduced outputs. We estimate these hyperbolic distance functions as “efficiency effect frontiers” with the Translog functional form and a dynamic...

  15. Multi-Sensor Bundle Adjustment using Rational Polynomial Functions for Glaciological Applications

    Ahn, Y.; Howat, I. M.; Morin, P. J.

    2011-12-01

    Several high-resolution satellite radiometers have been monitoring glaciated regions for over a decade, providing detailed information about changing glacier surface conditions such as calving events, thinning/thickening of glaciers/ice sheets, glacier surface velocity etc. that can be quantified using photogrammetric methods. These observations improve our understanding of glacier dynamics and its impact to sea level rise. Processing of large amounts of imagery, however, is hampered by incomplete and/or erroneous sensor model and ephemeris information. We develop an algorithm using rational polynomial functions to provide automated and sensor-independent registration with similar accuracy to that using physical sensor models. We focus on bundle adjustment using rational polynomial functions for several different sensors, including IKONOS, Worldview, CORONA and aerial photographs (vertical/oblique). Existing high-resolution imagery and DEM are used for ground control points measurement and the propagated errors due to the uncertainty in GCP will be assessed. We apply our approach to major outlet glaciers in Greenland and generate ortho-photos using an existing DEM. We discuss the level of applicability in velocity feature tracking and the methods limitations.

  16. Facilitating Adjustment to Higher Education: Towards Enhancing Academic Functioning in an Academic Development Programme

    Davidowitz, B.; Schreiber, B.

    2008-01-01

    Several studies have emphasised the importance of addressing social and emotional factors in facilitating adjustment to tertiary education. This article describes the Skills for Success in Science programme at the University of Cape Town. The broad aims were life skills development and improved adjustment which are assumed to underpin academic…

  17. Calculating the transfer function of noise removal by principal component analysis and application to AzTEC observations

    Downes, Thomas Patrick; Scott, Kimberly; Austermann, Jason; Wilson, Grant W

    2011-01-01

    Instruments using arrays of many bolometers have become increasingly common in the past decade. The maps produced by such instruments typically include the filtering effects of the instrument as well as those from subsequent steps performed in the reduction of the data. Therefore interpretation of the maps is dependent upon accurately calculating the transfer function of the chosen reduction technique on the signal of interest. Many of these instruments use non-linear and iterative techniques to reduce their data because such methods can offer improved signal-to-noise over those that are purely linear, particularly for signals at scales comparable to that subtended by the array. We discuss a general approach for measuring the transfer function of principal component analysis (PCA) on point sources that are small compared to the spatial extent seen by any single bolometer within the array. The results are applied to previously released AzTEC catalogues of the COSMOS, Lockman Hole, Subaru XMM-Newton Deep Field,...

  18. A Follow-up Study of Academic Functioning and Social Adjustment in Children with Attention Deficit Hyperactivity Disorder

    Jasmin Garg; Priti Arun

    2013-01-01

    Background : Attention deficit hyperactivity disorder (ADHD) persists in a majority of adolescents. It has been reported that ADHD patients have poor social functioning and risk for developing co-morbid psychiatric illnesses. Aims: To determine the retention of diagnosis of ADHD and to assess social adjustment, academic functioning and co-morbidities at follow-up. Design: Retrospective cohort study. Materials and Methods: ADHD patients of 5-14 years of age who came to the out-patient departme...

  19. On certain aspects of reproductive function preservation and social adjustment following complex treatment for Hodgkin's disease in childhood

    Data on the reproductive status and social adjustment of 443 children exposed to combined treatment of Hodgkin's disease according 3 different programs (from 1976 up to 1994). 1 program consists of chemoradiotherapy, 2 program includes the irradiation of zones of primary injury (cumulative dose up to 40 Gy), 3 program stipulates the irradiation of zones of primary injury at the cumulative dose 30 Gy. 258 patients reach the age of 18. It is shown that the treatment in childhood does not affect considerably the reproductive function and social adjustment

  20. Dynamics and spatio-temporal variability of environmental factors in Eastern Australia using functional principal component analysis

    Szabo, J.K.; Fedriani, E.M.; Segovia-Gonzalez, M. M.; Astheimer, L.B.; Hooper, M.J.

    2010-01-01

    This paper introduces a new technique in ecology to analyze spatial and temporal variability in environmental variables. By using simple statistics, we explore the relations between abiotic and biotic variables that influence animal distributions. However, spatial and temporal variability in rainfall, a key variable in ecological studies, can cause difficulties to any basic model including time evolution. The study was of a landscape scale (three million square kilometers in eastern Australia), mainly over the period of 19982004. We simultaneously considered qualitative spatial (soil and habitat types) and quantitative temporal (rainfall) variables in a Geographical Information System environment. In addition to some techniques commonly used in ecology, we applied a new method, Functional Principal Component Analysis, which proved to be very suitable for this case, as it explained more than 97% of the total variance of the rainfall data, providing us with substitute variables that are easier to manage and are even able to explain rainfall patterns. The main variable came from a habitat classification that showed strong correlations with rainfall values and soil types. ?? 2010 World Scientific Publishing Company.

  1. Adolescents with ADHD: patterns of behavioral adjustment, academic functioning, and treatment utilization.

    Barkley, R A; Anastopoulos, A D; Guevremont, D C; Fletcher, K E

    1991-09-01

    Adolescents with attention deficit hyperactivity disorder (ADHD) were compared with a control group on a comprehensive assessment battery. More ADHD teenagers had oppositional defiant disorder (68%) and conduct disorder (39%) and were rated as more impaired in social competence, behavioral and emotional adjustment, and school performance by parents and teachers than control teens. The ADHD youths, however, rated themselves as better adjusted than did their parents and teachers, differing only from controls in depressive symptoms and antisocial acts. Poorer performances in verbal learning and vigilance and greater ADHD behaviors during a math task also distinguished the ADHD from control teenagers. PMID:1938790

  2. Application of the principal fractional meta-trigonometric functions for the solution of linear commensurate-order time-invariant fractional differential equations.

    Lorenzo, C F; Hartley, T T; Malti, R

    2013-05-13

    A new and simplified method for the solution of linear constant coefficient fractional differential equations of any commensurate order is presented. The solutions are based on the R-function and on specialized Laplace transform pairs derived from the principal fractional meta-trigonometric functions. The new method simplifies the solution of such fractional differential equations and presents the solutions in the form of real functions as opposed to fractional complex exponential functions, and thus is directly applicable to real-world physics. PMID:23547228

  3. Sleep, Psychosocial Functioning, and Device-Specific Adjustment in Patients with Implantable Cardioverter Defibrillators (ICDs).

    McCrae, Christina S; Roth, Alicia J; Ford, Jessica; Crew, Earl C; Conti, Jamie B; Berry, Richard B; Sears, Samuel F

    2016-01-01

    Rates of sleep disorders and associated adjustment were examined in patients with implantable cardioverter defibrillators (ICDs; n = 42; Mage = 61.57, SD = 12.60). One night of ambulatory polysomnography, 14 days of sleep diaries, and questionnaires (mood, sleepiness, fatigue, device acceptance) were administered. Controlling for ischemia, MANCOVA examined adjustment by sleep diagnosis. Apnea was most common (28.6%), followed by Insomnia (16.7%) and Comorbid Insomnia/Apnea (11.9%). Patients with insomnia reported poorer mood, greater sleepiness, and lower device acceptance than good sleepers; they also demonstrated poorer mood and less ICD device acceptance than patients with sleep apnea. Patients with comorbid insomnia/apnea also exhibited poorer mood and less ICD device acceptance than good sleepers; however, comorbid patients did not significantly differ from insomnia or apnea patients on any measure. Those with disordered sleep (regardless of type) reported greater fatigue than good sleepers. Assessment (and treatment) of difficulties with sleep, mood, fatigue, and device acceptance may be important for the comprehensive clinical management of ICD patients. Further research appears warranted. PMID:25174823

  4. Evaluation of adjustment functions in a heuristic algorithm; Evaluacion de funciones de ajuste en un algoritmo heuristico

    Perusquia del Cueto, R.; Montes T, J. L.; Ortiz S, J. J.; Castillo M, A., E-mail: raul.perusquia@inin.gob.mx [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2011-11-15

    At present the techniques of evolution al computation receive an increasing attention in the scientific and technological areas. This situation is due to its enormous potential in the optimization applied to problems of discussed computational complexity. In the nuclear area these techniques are used in diverse problems of combinatory optimization related with designing cores of power reactors. A distinctive characteristic of the evolution al and/or meta-heuristic algorithms is that appeal in each one from their applications to an adjustment function, fitness or of quality. This function allows to discriminate or to evaluate potentials solutions of the problem to solve. The definition of this situation is very important since it allows following the search of the algorithm toward different regions of the search space. In this work the impact that has the election of this function in the quality of the found solution is shown. The optimization technique by ant colonies or Acs (ant colony system) was used applied to the radial design of fuel cells for a boiling water power reactor. The notable results of the Acs allowed to propose the adjustment method of the importance and with this to obtain adjustment functions that guide the search of solutions of collective algorithms efficiently, basic capacity to develop the proposal of emulation of the natural selection and to investigate the possibility that on order of specify goals, to obtain the corresponding decision variables. A variety of re tro-exit (re tro-out) complementary process of feedback (re tro-in) that opens extended application perspectives of be feasible. (Author)

  5. Individual Differences in Adolescents' Sympathetic and Parasympathetic Functioning Moderate Associations between Family Environment and Psychosocial Adjustment

    Diamond, Lisa M.; Fagundes, Christopher P.; Cribbet, Matthew R.

    2012-01-01

    The present study tested whether individual differences in autonomic nervous system functioning interact with environmental risk factors to predict adolescents' psychosocial functioning. The authors assessed skin conductance and respiratory sinus arrhythmia at rest and during laboratory stressors in 110 14-year-olds. Subsequently, adolescents and…

  6. A follow-up study of academic functioning and social adjustment in children with attention deficit hyperactivity disorder

    Jasmin Garg

    2013-01-01

    Full Text Available Background : Attention deficit hyperactivity disorder (ADHD persists in a majority of adolescents. It has been reported that ADHD patients have poor social functioning and risk for developing co-morbid psychiatric illnesses. Aims: To determine the retention of diagnosis of ADHD and to assess social adjustment, academic functioning and co-morbidities at follow-up. Design: Retrospective cohort study. Materials and Methods: ADHD patients of 5-14 years of age who came to the out-patient department from 2005 to 2008 were contacted telephonically. Fifty one patients could be contacted. Parents of patients were interviewed using Vanderbilt ADHD Diagnostic Parent Rating Scale for diagnosing ADHD and co-morbidities. Social Adjustment Inventory for Children and Adolescent was administered for assessing their academic and social functioning. Chi square test, Mann-Whitney Test, Kruskal-Wallis Test, and Pearson′s product moment correlations were used for statistical analysis. Results: At current assessment, out of 51 patients, 38 were still fulfilling diagnosis of ADHD. Of these, 21 were of inattention type, 3 were hyperactive, and 14 were of combined type. Social functioning and academic functioning were significantly better in those who currently did not fulfill the criteria for ADHD ( N=13. Twelve patients developed features of oppositional defiant disorder (ODD/conduct disorder (CD at follow-up. Conclusions: ADHD persists in the majority of adolescents. Decline with age is seen more in hyperactive/impulsive symptoms than inattentive symptoms. Several adolescents also develop features of ODD/CD in addition to poorer functioning. Continuation of treatment is crucial to prevent such consequences.

  7. Individual differences in adolescents' sympathetic and parasympathetic functioning moderate associations between family environment and psychosocial adjustment.

    Diamond, Lisa M; Fagundes, Christopher P; Cribbet, Matthew R

    2012-07-01

    The present study tested whether individual differences in autonomic nervous system functioning interact with environmental risk factors to predict adolescents' psychosocial functioning. The authors assessed skin conductance and respiratory sinus arrhythmia at rest and during laboratory stressors in 110 14-year-olds. Subsequently, adolescents and their mothers provided both questionnaire and daily diary data (over 10 days) on emotional and interpersonal functioning. The authors found stronger associations between environmental risk factors (having a single-mother household or a mother with high internalizing problems) and psychosocial outcomes (externalizing problems, daily negative affect, and daily interaction quality) among youths with specific patterns of tonic and stress-induced sympathetic and parasympathetic nervous system activity, but the pattern of moderating effects differed between boys and girls. The findings support the notion that individual differences in autonomic functioning index variation in youth's susceptibility to environmental risk factors. PMID:22268602

  8. The open-faced sandwich adjustment for MCMC using estimating functions

    Shaby, Benjamin A.

    2012-01-01

    The situation frequently arises where working with the likelihood function is problematic. This can happen for several reasons---perhaps the likelihood is prohibitively computationally expensive, perhaps it lacks some robustness property, or perhaps it is simply not known for the model under consideration. In these cases, it is often possible to specify alternative functions of the parameters and the data that can be maximized to obtain asymptotically normal estimates. However, these scenario...

  9. Child adjustment and parent functioning: Considering the role of child-driven effects.

    Yan, Ni; Ansari, Arya

    2016-04-01

    Based on 13,694 mother-child dyads from the Early Childhood Longitudinal Kindergarten Study (ECLS-K; Rock & Pollack, 2002; Tourangeau, Nord, Lê, Sorongon, & Najarian, 2009), this study is an examination of the bidirectional relations between parental and child functioning from kindergarten through 3rd grade. Results from the cross-lagged models demonstrated that child-driven effects co-occurred with parental effects, and that these effects were comparable in size. At the same time, however, results from the latent profile analysis (LPA) revealed idiosyncratic patterns of parent and child functioning. Compared with children in the least optimal functioning profiles, those in the average and above-average profiles elicited greater improvement in parents' functioning over time. Although children characterized by poor academic performance at kindergarten appeared to precede parents characterized by harsh parenting at 3rd grade, there was a threshold in the evolving strength of the overall child-driven effects. Taken together, the results from this study underscore the importance of considering reciprocal processes in the parent-child dynamic while also underscoring individual differences in these processes across the early- to middle-childhood years. PMID:26866838

  10. Parental Adjustment, Marital Relationship, and Family Function in Families of Children with Autism

    Gau, Susan Shur-Fen; Chou, Miao-Churn; Chiang, Huey-Ling; Lee, Ju-Chin; Wong, Ching-Ching; Chou, Wen-Jiun; Wu, Yu-Yu

    2012-01-01

    This study aimed to investigate the psychopathology, marital relationship, and family function in parents of children with autistic disorder (autism) as compared to parents of typically developing children. We also compared these measures between the mothers and the fathers. We assessed 151 families with at least one child with autistic disorder…

  11. Calibrating Independence Goals and Partner Support: Couples Adjust to Functional Limitations after Tumor Surgery

    Knoll, N; Wiedemann, AU; Schrader, M; Felber, J.; Burkert, S; Daig, I; Heckhausen, J

    2015-01-01

    © 2015 The International Association of Applied Psychology. When patients recover from disease-related functional limitations, support received from partners may not always match patients' changing independence goals. The lines of defense (LoD) model proposes a hierarchy of independence goals (LoDs), ranging from minimising discomfort by disengagement (lowest LoD) to protection of self-reliance (highest LoD). Prostate cancer patients' LoDs were examined as moderators of the association betwee...

  12. Tipping Points in Adolescent Adjustment: Predicting Social Functioning from Adolescents’ Conflict with Parents and Friends

    Ehrlich, Katherine B.; Dykas, Matthew J.; Cassidy, Jude

    2012-01-01

    Despite widespread interest in examining the role of conflict for adolescent development, researchers only rarely have examined adolescents’ experiences of conflict across relationships. The present study examined how adolescents’ experiences of conflict with parents and friends were linked to their social functioning. Adolescents (n = 189) and their mothers and fathers participated in semi-structured discussions about areas of adolescent-parent conflict in the laboratory. In addition, adoles...

  13. The hippocampus of the eastern rock sengi: cytoarchitecture, markers of neuronal function, principal cell numbers, and adult neurogenesis.

    Slomianka, Lutz; Drenth, Tanja; Cavegn, Nicole; Menges, Dominik; Lazic, Stanley E; Phalanndwa, Mashudu; Chimimba, Christian T; Amrein, Irmgard

    2013-01-01

    The brains of sengis (elephant shrews, order Macroscelidae) have long been known to contain a hippocampus that in terms of allometric progression indices is larger than that of most primates and equal in size to that of humans. In this report, we provide descriptions of hippocampal cytoarchitecture in the eastern rock sengi (Elephantulus myurus), of the distributions of hippocampal calretinin, calbindin, parvalbumin, and somatostatin, of principal neuron numbers, and of cell numbers related to proliferation and neuronal differentiation in adult hippocampal neurogenesis. Sengi hippocampal cytoarchitecture is an amalgamation of characters that are found in CA1 of, e.g., guinea pig and rabbits and in CA3 and dentate gyrus of primates. Correspondence analysis of total cell numbers and quantitative relations between principal cell populations relate this sengi to macaque monkeys and domestic pigs, and distinguish the sengi from distinct patterns of relations found in humans, dogs, and murine rodents. Calretinin and calbindin are present in some cell populations that also express these proteins in other species, e.g., interneurons at the stratum oriens/alveus border or temporal hilar mossy cells, but neurons expressing these markers are often scarce or absent in other layers. The distributions of parvalbumin and somatostatin resemble those in other species. Normalized numbers of PCNA+ proliferating cells and doublecortin-positive (DCX+) differentiating cells of neuronal lineage fall within the overall ranges of murid rodents, but differed from three murid species captured in the same habitat in that fewer DCX+ cells relative to PCNA+ were observed. The large and well-differentiated sengi hippocampus is not accompanied by correspondingly sized cortical and subcortical limbic areas that are the main hippocampal sources of afferents and targets of efferents. This points to intrinsic hippocampal information processing as the selective advantage of the large sengi hippocampus

  14. The hippocampus of the eastern rock sengi: cytoarchitecture, markers of neuronal function, principal cell numbers and adult neurogenesis

    Lutz eSlomianka

    2013-10-01

    Full Text Available The brains of sengis (elephant shrews, order Macroscelidae have long been known to contain a hippocampus that in terms of allometric progression indices is larger than that of most primates and equal in size to that of humans. In this report, we provide descriptions of hippocampal cytoarchitecture in the eastern rock sengi (Elephantulus myurus, of the distributions of hippocampal calretinin, calbindin, parvalbumin and somatostatin, of principal neuron numbers and of cell numbers related to proliferation and neuronal differentiation in adult hippocampal neurogenesis. Sengi hippocampal cytoarchitecture is an amalgamation of characters that are found in CA1 of, e.g., guinea pig and rabbits and in CA3 and dentate gyrus of primates. Correspondence analysis of total cell numbers and quantitative relations between principal cell populations relate this sengi to macaque monkeys and domestic pigs, and distinguish the sengi from distinct patterns of relations found in humans, dogs and murine rodents. Calretinin and calbindin are present in some cell populations that also express these proteins in other species, e.g., interneurons at the stratum oriens/alveus border or temporal hilar mossy cells, but neurons expressing these markers are often scarce or absent in other layers. The distributions of parvalbumin and somatostatin resemble those in other species. Normalized numbers of PCNA+ proliferating cells and doublecortin+ differentiating cells of neuronal lineage fall within the overall ranges of murid rodents, but differed from three murid species captured in the same habitat in that fewer doublecortin+ cells relative to PCNA+ were observed . The large and well-differentiated sengi hippocampus is not accompanied by correspondingly sized cortical and subcortical limbic areas that are the main hippocampal sources of afferents and targets of efferents. This points to intrinsic hippocampal information processing as the selective advantage of the large sengi

  15. Application of principal component-radial basis function neural networks (PC-RBFNN) for the detection of water-adulterated bayberry juice by near-infrared spectroscopy

    Li-juan XIE; Xing-qian YE; Dong-hong LIU; Yi-bin YING

    2008-01-01

    Near-infrared (NIR) spectroscopy combined with chemometrics techniques was used to classify the pure bayberry juice and the one adulterated with 10% (w/w) and 20% (w/w) water. Principal component analysis (PCA) was applied to reduce the dimensions of spectral data, give information regarding a potential capability of separation of objects, and provide principal component (PC) scores for radial basis function neural networks (RBFNN). RBFNN was used to detect bayberry juice adulterant. Multiplicative scatter correction (MSC) and standard normal variate (SNV) transformation were used to preprocess spectra. The results demonstrate that PC-RBFNN with optimum parameters can separate pure bayberry juice samples from water-adulterated bayberry at a recognition rate of 97.62%, but cannot clearly detect water levels in the adulterated bayberry juice. We conclude that NIR technology can be successfully applied to detect water-adulterated bayberry juice.

  16. Multicatalytic colloids with highly scalable, adjustable, and stable functionalities in organic and aqueous media

    Kim, Donghee; Cheong, Sanghyuk; Ahn, Yun Gyong; Ryu, Sook Won; Kim, Jai-Kyeong; Cho, Jinhan

    2016-03-01

    Despite a large number of developments of noble metal (or metal oxide) NP-based catalysts, it has been a great challenge to prepare high-performance recyclable catalysts with integrated functionalities that can be used in various solvent media. Here, we report on layer-by-layer (LbL) assembled multicatalysts with high catalytic performance, showing high dispersion and recycling stability in organic and aqueous media. The remarkable advantages of our approach are as follows. (i) Various metal or metal oxide NPs with desired catalytic performance can be easily incorporated into multilayered shells, forming densely packed arrays that allow one colloid to be used as a multicatalyst with highly integrated and controllable catalytic properties. (ii) Additionally, the dispersion stability of catalytic colloids in a desired solvent can be determined by the type of ultrathin outermost layer coating each colloid. (iii) Lastly, the covalent bonding between inorganic NPs and dendrimers within multilayer shells enhances the recycling stability of multicatalytic colloids. The resulting core-shell colloids including OA-Fe3O4 NPs, TOABr-Pd NPs, and OA-TiO2 NPs exhibited excellent performance in the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) and photocatalysis in aqueous media and in the Sonogashira coupling reaction (99% yield) in organic media. Given that the catalytic properties of recyclable colloids reported to date have entirely depended on the functionality of a single catalytic NP layer deposited onto colloids in selective solvent media, our approach provides a basis for the design and exploitation of high-performance recyclable colloids with integrated multicatalytic properties and high dispersion stability in a variety of solvents.Despite a large number of developments of noble metal (or metal oxide) NP-based catalysts, it has been a great challenge to prepare high-performance recyclable catalysts with integrated functionalities that can be used in various solvent

  17. Multicatalytic colloids with highly scalable, adjustable, and stable functionalities in organic and aqueous media.

    Kim, Donghee; Cheong, Sanghyuk; Ahn, Yun Gyong; Ryu, Sook Won; Kim, Jai-Kyeong; Cho, Jinhan

    2016-03-24

    Despite a large number of developments of noble metal (or metal oxide) NP-based catalysts, it has been a great challenge to prepare high-performance recyclable catalysts with integrated functionalities that can be used in various solvent media. Here, we report on layer-by-layer (LbL) assembled multicatalysts with high catalytic performance, showing high dispersion and recycling stability in organic and aqueous media. The remarkable advantages of our approach are as follows. (i) Various metal or metal oxide NPs with desired catalytic performance can be easily incorporated into multilayered shells, forming densely packed arrays that allow one colloid to be used as a multicatalyst with highly integrated and controllable catalytic properties. (ii) Additionally, the dispersion stability of catalytic colloids in a desired solvent can be determined by the type of ultrathin outermost layer coating each colloid. (iii) Lastly, the covalent bonding between inorganic NPs and dendrimers within multilayer shells enhances the recycling stability of multicatalytic colloids. The resulting core-shell colloids including OA-Fe3O4 NPs, TOABr-Pd NPs, and OA-TiO2 NPs exhibited excellent performance in the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) and photocatalysis in aqueous media and in the Sonogashira coupling reaction (99% yield) in organic media. Given that the catalytic properties of recyclable colloids reported to date have entirely depended on the functionality of a single catalytic NP layer deposited onto colloids in selective solvent media, our approach provides a basis for the design and exploitation of high-performance recyclable colloids with integrated multicatalytic properties and high dispersion stability in a variety of solvents. PMID:26524289

  18. Adjusting Spectral Indices for Spectral Response Function Differences of Very High Spatial Resolution Sensors Simulated from Field Spectra

    Sharon L. Cundill

    2015-03-01

    Full Text Available The use of data from multiple sensors is often required to ensure data coverage and continuity, but differences in the spectral characteristics of sensors result in spectral index values being different. This study investigates spectral response function effects on 48 spectral indices for cultivated grasslands using simulated data of 10 very high spatial resolution sensors, convolved from field reflectance spectra of a grass covered dike (with varying vegetation condition. Index values for 48 indices were calculated for original narrow-band spectra and convolved data sets, and then compared. The indices Difference Vegetation Index (DVI, Global Environmental Monitoring Index (GEMI, Enhanced Vegetation Index (EVI, Modified Soil-Adjusted Vegetation Index (MSAVI2 and Soil-Adjusted Vegetation Index (SAVI, which include the difference between the near-infrared and red bands, have values most similar to those of the original spectra across all 10 sensors (1:1 line mean 1:1R2 > 0.960 and linear trend mean ccR2 > 0.997. Additionally, relationships between the indices’ values and two quality indicators for grass covered dikes were compared to those of the original spectra. For the soil moisture indicator, indices that ratio bands performed better across sensors than those that difference bands, while for the dike cover quality indicator, both the choice of bands and their formulation are important.

  19. A Discriminant Function Approach to Adjust for Processing and Measurement Error When a Biomarker is Assayed in Pooled Samples

    Robert H. Lyles

    2015-11-01

    Full Text Available Pooling biological specimens prior to performing expensive laboratory assays has been shown to be a cost effective approach for estimating parameters of interest. In addition to requiring specialized statistical techniques, however, the pooling of samples can introduce assay errors due to processing, possibly in addition to measurement error that may be present when the assay is applied to individual samples. Failure to account for these sources of error can result in biased parameter estimates and ultimately faulty inference. Prior research addressing biomarker mean and variance estimation advocates hybrid designs consisting of individual as well as pooled samples to account for measurement and processing (or pooling error. We consider adapting this approach to the problem of estimating a covariate-adjusted odds ratio (OR relating a binary outcome to a continuous exposure or biomarker level assessed in pools. In particular, we explore the applicability of a discriminant function-based analysis that assumes normal residual, processing, and measurement errors. A potential advantage of this method is that maximum likelihood estimation of the desired adjusted log OR is straightforward and computationally convenient. Moreover, in the absence of measurement and processing error, the method yields an efficient unbiased estimator for the parameter of interest assuming normal residual errors. We illustrate the approach using real data from an ancillary study of the Collaborative Perinatal Project, and we use simulations to demonstrate the ability of the proposed estimators to alleviate bias due to measurement and processing error.

  20. A Discriminant Function Approach to Adjust for Processing and Measurement Error When a Biomarker is Assayed in Pooled Samples.

    Lyles, Robert H; Van Domelen, Dane; Mitchell, Emily M; Schisterman, Enrique F

    2015-11-01

    Pooling biological specimens prior to performing expensive laboratory assays has been shown to be a cost effective approach for estimating parameters of interest. In addition to requiring specialized statistical techniques, however, the pooling of samples can introduce assay errors due to processing, possibly in addition to measurement error that may be present when the assay is applied to individual samples. Failure to account for these sources of error can result in biased parameter estimates and ultimately faulty inference. Prior research addressing biomarker mean and variance estimation advocates hybrid designs consisting of individual as well as pooled samples to account for measurement and processing (or pooling) error. We consider adapting this approach to the problem of estimating a covariate-adjusted odds ratio (OR) relating a binary outcome to a continuous exposure or biomarker level assessed in pools. In particular, we explore the applicability of a discriminant function-based analysis that assumes normal residual, processing, and measurement errors. A potential advantage of this method is that maximum likelihood estimation of the desired adjusted log OR is straightforward and computationally convenient. Moreover, in the absence of measurement and processing error, the method yields an efficient unbiased estimator for the parameter of interest assuming normal residual errors. We illustrate the approach using real data from an ancillary study of the Collaborative Perinatal Project, and we use simulations to demonstrate the ability of the proposed estimators to alleviate bias due to measurement and processing error. PMID:26593934

  1. ADJUSTMENT FACTORS AND ADJUSTMENT STRUCTURE

    Tao Benzao

    2003-01-01

    In this paper, adjustment factors J and R put forward by professor Zhou Jiangwen are introduced and the nature of the adjustment factors and their role in evaluating adjustment structure is discussed and proved.

  2. Adjustment of muscle function to flight in bats; Komori no kinkino no hiko eno tekio

    Yamashita, M. [Institute of the Space and Astronautical Science,Tokyo (Japan); Choi, I.H.

    1999-12-05

    This paper outlines the muscle of bats that generates a motive force for flight. The weight of the muscle is less compared with that of birds. The energy required for flight is twice as much as that for running. Conversely, in view of metabolic cost (transporting cost) for moving a unit mass for a unit distance, the transporting cost of bats for flying is one fifth. The acquisition of this flight ability through evolution can be inferred from the fossils of reptiles. Bats, having a stream-lined body shape and a small body mass, are capable of efficient flight. A fast durable flight is possible by having the pectoral muscle constituted of speed muscles of oxidation/glycolysis muscle fiber, a well-developed oxygen transporting system, the arrangement around the capillary of mitochondria and fat grains that are cell organs for producing energy, and a high-density contact between the capillary and the muscle fiber. The muscle functions at low body temperature and imparts adaptability to hibernation with the body temperature lowered. The flight is controlled by the cycle and synchronized with this biological clock, optical cycle and change in temperature. (NEDO)

  3. Behavioral and emotional adjustment, family functioning, academic performance, and social relationships in children with selective mutism.

    Cunningham, Charles E; McHolm, Angela; Boyle, Michael H; Patel, Sejal

    2004-11-01

    This study addressed four questions which parents of children with selective mutism (SM) frequently ask: (1) Is SM associated with anxiety or oppositional behavior? (2) Is SM associated with parenting and family dysfunction? (3) Will my child fail at school? and (4) Will my child make friends or be teased and bullied? In comparison to a sample of 52 community controls, 52 children with SM were more anxious, obsessive, and prone to somatic complaints. In contrast, children with SM were less oppositional and evidenced fewer attentional difficulties at school. We found no group differences in family structure, economic resources, family functioning, maternal mood difficulties, recreational activities, or social networks. While parents reported no differences in parenting strategies, children with SM were described as less cooperative in disciplinary situations. The academic (e.g., reading and math) and classroom cooperative skills of children with SM did not differ from controls. Parents and teachers reported that children with SM had significant deficits in social skills. Though teachers and parents rated children with SM as less socially assertive, neither teachers nor parents reported that children with SM were victimized more frequently by peers. PMID:15482497

  4. Antitussive Activity of Pseudostellaria heterophylla (Miq. Pax Extracts and Improvement in Lung Function via Adjustment of Multi-Cytokine Levels

    Juan Hu

    2011-04-01

    Full Text Available Pseudostellaria heterophylla (Miq. Pax is one of the most widespread herbal and healthcare products in China. Extensive clinical use has shown that it has functions which “strengthens qi and generates saliva, moistens the lung and relieves cough”. The ethyl acetate fraction extracted from the roots of the plant Pseudostellaria heterophylla exhibited a dose-dependent antitussive effect between 100 to 500 mg/kg. At a dose of 400 mg/kg, the ethyl acetate fraction treatment markedly prolonged the cough latent period and reduced the number of coughs in a guinea pig model induced by citric acid. Fall lung airway resistance, rise in dynamic lung compliance, decreased serum levels of IL-8, GM-CSF, TNF-α, and ET-1 in rat model of stable phase chronic obstructive pulmonary disease induced by cigarette smoke exposure were also observed. These results suggest that ethyl acetate fraction has antitussive activity related to its improvement in lung function via attenuation of airway inflammation by adjustment of multi-cytokine levels.

  5. Convexity Adjustments

    M. Gaspar, Raquel; Murgoci, Agatha

    2010-01-01

    A convexity adjustment (or convexity correction) in fixed income markets arises when one uses prices of standard (plain vanilla) products plus an adjustment to price nonstandard products. We explain the basic and appealing idea behind the use of convexity adjustments and focus on the situations o...

  6. A stock market forecasting model combining two-directional two-dimensional principal component analysis and radial basis function neural network.

    Zhiqiang Guo

    Full Text Available In this paper, we propose and implement a hybrid model combining two-directional two-dimensional principal component analysis ((2D2PCA and a Radial Basis Function Neural Network (RBFNN to forecast stock market behavior. First, 36 stock market technical variables are selected as the input features, and a sliding window is used to obtain the input data of the model. Next, (2D2PCA is utilized to reduce the dimension of the data and extract its intrinsic features. Finally, an RBFNN accepts the data processed by (2D2PCA to forecast the next day's stock price or movement. The proposed model is used on the Shanghai stock market index, and the experiments show that the model achieves a good level of fitness. The proposed model is then compared with one that uses the traditional dimension reduction method principal component analysis (PCA and independent component analysis (ICA. The empirical results show that the proposed model outperforms the PCA-based model, as well as alternative models based on ICA and on the multilayer perceptron.

  7. A stock market forecasting model combining two-directional two-dimensional principal component analysis and radial basis function neural network.

    Guo, Zhiqiang; Wang, Huaiqing; Yang, Jie; Miller, David J

    2015-01-01

    In this paper, we propose and implement a hybrid model combining two-directional two-dimensional principal component analysis ((2D)2PCA) and a Radial Basis Function Neural Network (RBFNN) to forecast stock market behavior. First, 36 stock market technical variables are selected as the input features, and a sliding window is used to obtain the input data of the model. Next, (2D)2PCA is utilized to reduce the dimension of the data and extract its intrinsic features. Finally, an RBFNN accepts the data processed by (2D)2PCA to forecast the next day's stock price or movement. The proposed model is used on the Shanghai stock market index, and the experiments show that the model achieves a good level of fitness. The proposed model is then compared with one that uses the traditional dimension reduction method principal component analysis (PCA) and independent component analysis (ICA). The empirical results show that the proposed model outperforms the PCA-based model, as well as alternative models based on ICA and on the multilayer perceptron. PMID:25849483

  8. Maternal depression across the first years of life compromises child psychosocial adjustment; relations to child HPA-axis functioning.

    Apter-Levi, Yael; Pratt, Maayan; Vakart, Adam; Feldman, Michal; Zagoory-Sharon, Orna; Feldman, Ruth

    2016-02-01

    Maternal depression across the first years of life negatively impacts children's development. One pathway of vulnerability may involve functioning of the hypothalamic-pituitary-adrenal (HPA) axis. We utilize a community cohort of 1983 women with no comorbid risk repeatedly assessed for depression from birth to six years to form two groups; chronically depressed (N=40) and non-depressed (N=91) women. At six years, mother and child underwent psychiatric diagnosis, child salivary cortisol (CT) was assessed three times during a home-visit, mother-child interaction was videotaped, and child empathy was coded from behavioral paradigms. Latent Growth curve Model using Structural Equation Modeling (SEM) estimated the links between maternal depression and mother's negative parenting and three child outcomes; psychopathology, social withdrawal, and empathy as related to child CT baseline and variability. Depressed mothers displayed more negative parenting and their children showed more Axis-I psychopathology and social withdrawal. SEM analysis revealed that maternal depression was associated with reduced CT variability, which predicted higher child psychopathology and social withdrawal. Whereas all children exhibited similar initial levels of CT, children of controls reduced CT levels over time while children of depressed mothers maintained high, non-flexible levels. Mother negativity was related to lower initial CT levels, which predicted decreased empathy. Findings suggest that chronic maternal depression may compromise children's social-emotional adjustment by diminishing HPA-system flexibility as well as limiting the mother's capacity to provide attuned and predictable caregiving. PMID:26610204

  9. Realistic PIC modelling of laser-plasma interaction: a direct implicit method with adjustable damping and high order weight functions

    This research thesis proposes a new formulation of the relativistic implicit direct method, based on the weak formulation of the wave equation which is solved by means of a Newton algorithm. The first part of this thesis deals with the properties of the explicit particle-in-cell (PIC) methods: properties and limitations of an explicit PIC code, linear analysis of a numerical plasma, numerical heating phenomenon, interest of a higher order interpolation function, and presentation of two applications in high density relativistic laser-plasma interaction. The second and main part of this report deals with adapting the direct implicit method to laser-plasma interaction: presentation of the state of the art, formulating of the direct implicit method, resolution of the wave equation. The third part concerns various numerical and physical validations of the ELIXIRS code: case of laser wave propagation in vacuum, demonstration of the adjustable damping which is a characteristic of the proposed algorithm, influence of space-time discretization on energy conservation, expansion of a thermal plasma in vacuum, two cases of plasma-beam unsteadiness in relativistic regime, and then a case of the overcritical laser-plasma interaction

  10. Principal Experiences of Succession

    Steele, Farla Gay

    2015-01-01

    This multiple case study explored the experiences of school principals and the usefulness of Peters' (2011) succession planning model. Ten purposefully selected principals from varying grade levels were interviewed; none reported a formal succession plan, and all had been assistant principals. The study concluded the assistant principal position…

  11. Derivation of a new continuous adjustment function for correcting wind-induced loss of solid precipitation: results of a Norwegian field study

    Wolff, M. A.; Isaksen, K.; Petersen-Øverleir, A.; Ødemark, K.; Reitan, T.; Brækkan, R.

    2015-02-01

    Precipitation measurements exhibit large cold-season biases due to under-catch in windy conditions. These uncertainties affect water balance calculations, snowpack monitoring and calibration of remote sensing algorithms and land surface models. More accurate data would improve the ability to predict future changes in water resources and mountain hazards in snow-dominated regions. In 2010, a comprehensive test site for precipitation measurements was established on a mountain plateau in southern Norway. Automatic precipitation gauge data are compared with data from a precipitation gauge in a Double Fence Intercomparison Reference (DFIR) wind shield construction which serves as the reference. A large number of other sensors are provided supporting data for relevant meteorological parameters. In this paper, data from three winters are used to study and determine the wind-induced under-catch of solid precipitation. Qualitative analyses and Bayesian statistics are used to evaluate and objectively choose the model that best describes the data. A continuous adjustment function and its uncertainty are derived for measurements of all types of winter precipitation (from rain to dry snow). A regression analysis does not reveal any significant misspecifications for the adjustment function, but shows that the chosen model does not describe the regression noise optimally. The adjustment function is operationally usable because it is based only on data available at standard automatic weather stations. The results show a non-linear relationship between under-catch and wind speed during winter precipitation events and there is a clear temperature dependency, mainly reflecting the precipitation type. The results allow, for the first time, derivation of an adjustment function based on measurements above 7 m s-1. This extended validity of the adjustment function shows a stabilization of the wind-induced precipitation loss for higher wind speeds.

  12. Principal Leadership in the Accountability Era: Influence of Expanding Job Responsibilities on Functional Work Performance, Stress Management, and Overall Job Satisfaction

    Andreyko, Tammy A.

    2010-01-01

    This study examined the relationship of stress, burnout, and coping strategies among middle school principals in Western Pennsylvania. This study assessed coping skill preferences among middle school principals, especially regarding their age, gender, marital status, experience, and school enrollment. A review of the literature included studies…

  13. Adjustment disorder

    American Psychiatric Association. Diagnostic and statistical manual of mental disorders . 5th ed. Arlington, VA: American Psychiatric Publishing. 2013. Powell AD. Grief, bereavement, and adjustment disorders. In: Stern TA, Fava ...

  14. Adjustment disorder

    American Psychiatric Association. Diagnostic and statistical manual of mental disorders. 5th ed. Arlington, Va: American Psychiatric Publishing. 2013. Powell AD. Grief, bereavement, and adjustment disorders. In: Stern TA, Rosenbaum ...

  15. The Provident Principal.

    McCall, John R.

    This monograph offers leadership approaches for school principals. Discussion applies the business leadership theory of Warren Bennis and Burt Nanus to the role of the principal. Each of the booklet's three parts concludes with discussion questions. Part 1, "Visions and Values for the Provident Principal," demonstrates the importance of…

  16. Elementary School Principal Effectiveness.

    Cross, Ray

    A review of research linking elementary principal "antecedents" (defined as traits), behaviors, school conditions, and student outcomes furnishes few supportable generalizations. The studies relating principal antecedents with behavior and principal antecedents with organizational variables reveals that the trait theory of leadership has fared…

  17. Adjustment Criterion and Algorithm in Adjustment Model with Uncertain

    SONG Yingchun

    2015-02-01

    Full Text Available Uncertainty often exists in the process of obtaining measurement data, which affects the reliability of parameter estimation. This paper establishes a new adjustment model in which uncertainty is incorporated into the function model as a parameter. A new adjustment criterion and its iterative algorithm are given based on uncertainty propagation law in the residual error, in which the maximum possible uncertainty is minimized. This paper also analyzes, with examples, the different adjustment criteria and features of optimal solutions about the least-squares adjustment, the uncertainty adjustment and total least-squares adjustment. Existing error theory is extended with new observational data processing method about uncertainty.

  18. Effects of pH adjustment with phosphates on attributes and functionalities of normal and high pH beef.

    Young, O A; Zhang, S X; Farouk, M M; Podmore, C

    2005-05-01

    Longissimus dorsi muscles from six normal- and six high-ultimate pH bulls were selected for fine mincing and subsequent pH adjustment with acid and alkaline pyrophosphate. Four pH treatments were prepared: initially high remains high (mean of pH 6.37), high becomes normal (5.62); initially normal remains normal (5.65), and normal becomes high (6.21). The addition level of phosphate as P(2)O(5) was the same in all replicates. Before pH adjustment, colour and water holding capacity (WHC) values were strongly affected by higher (initial) pH in expected ways: darker, lower chroma, higher capacity. After pH adjustment, these values were affected only by the final pH, not the initial pH (the pH history). Total protein solubility was likewise affected by final pH but not initial pH. In contrast, the combination high initial pH-high final pH improved sarcoplasmic protein solubility by 20% over the combination normal initial pH-high final pH. Sarcoplasmic protein solubility is an indicator of strain required to fracture cooked batters made from the minced meats; in the event, the rank order of the four treatments for strain-to-fracture matched that of sarcoplasmic protein solubility. Statistically, sarcoplasmic protein solubility and strain-to-fracture were both affected by initial pH (P<0.01) and final pH (P<0.001). However, stress required to fracture cooked batters was entirely controlled by initial pH (P<0.01). In other words, the stress-to-fracture advantage of initially high pH meat was not matched by upward pH adjustment of initially normal pH meat. Emulsion stability, which is better with higher pH meat, was affected by initial and final pH (both P<0.01). Cook yield, like WHC of pH-adjusted raw meat, was more due to final pH than initial pH, similarly cooked batter colour, whereas final pH had a significant effect on quality attributes (generally better when higher). An initially high pH history conferred an enduring advantage on three important batter attributes

  19. Technical Document for Price Adjustment

    Zheng Tian; Mulugeta Kahsai; Randall Jackson

    2014-01-01

    This document presents the basis for the price adjustment mechanisms in a time series IO model. The essentials of the price adjustment and price change propagation algorithms are presented, along with a matrix permutation algorithm that facilitates the implementation of the price adjustment mechanism. The Matlab function is provided.

  20. Redesigning Principal Internships: Practicing Principals' Perspectives

    Anast-May, Linda; Buckner, Barbara; Geer, Gregory

    2011-01-01

    Internship programs too often do not provide the types of experiences that effectively bridge the gap between theory and practice and prepare school leaders who are capable of leading and transforming schools. To help address this problem, the current study is directed at providing insight into practicing principals' views of the types of…

  1. Effect of adjusted pH prior to ultrafiltration of skim milk on membrane performance and physical functionality of milk protein concentrate.

    Luo, X; Vasiljevic, T; Ramchandran, L

    2016-02-01

    Processing conditions during ultrafiltration of skim milk influence properties of the casein micelle and thereby the physical properties of milk protein concentrate (MPC). The aim of the study was to establish the effects of pH adjustment of skim milk feed to obtain MPC with desired emulsification properties. The ultrafiltration was conducted using commercially pasteurized skim milk with the pH adjusted to 6.7 (control), 6.3, 5.9, or 5.5 at 15°C until a volume concentration factor of 5 was reached. Effects of pH adjustment on selected physico-chemical properties (Ca content, particle size, ζ-potential) and functionalities (solubility, heat stability, emulsification capacity, and stability) of MPC were determined. Lowering the feed pH solubilized colloidal calcium phosphate that substantially contributed to modifying the properties of casein. This caused a reduction in the particle size while increasing the net negative charge. The structural modifications in proteins were manifested in the Fourier transform infrared spectra. Subsequent concentration did not induce any further protein structural changes. Such modifications to the casein micelles and colloidal calcium phosphate negatively affected the solubility and heat stability of the corresponding MPC powders. However, the emulsion activity index improved only until the pH of the feed was lowered to 5.9 and declined when pH was dropped to 5.5, followed with the loss of stability. Readjusting the pH of MPC powder dispersions to 6.7 restored their surface properties and thereby their functionality. Lowering the feed pH also negatively affected the membrane performance by clogging the membrane pores and lowering the flux, particularly at pH 5.5. Adjusting pH to 5.9 produced MPC with optimum emulsifying properties with minimal influence on membrane performance. PMID:26686705

  2. Principal Graphs and Manifolds

    Gorban, A N

    2008-01-01

    In many physical statistical, biological and other investigations it is desirable to approximate a system of points by objects of lower dimension and/or complexity. For this purpose, Karl Pearson invented principal component analysis in 1901 and found "lines and planes of closest fit to system of points". The famous k-means algorithm solves the approximation problem too, but by finite sets instead of lines and planes. This chapter gives a brief practical introduction into the methods of construction of general principal objects, i.e. objects embedded in the "middle" of the multidimensional data set. As a basis, the unifying framework of mean squared distance approximation of finite datasets is selected. Principal graphs and manifolds are constructed as generalisations of principal components and k-means principal points. For this purpose, the family of expectation/maximisation algorithms with nearest generalisations is presented. Construction of principal graphs with controlled complexity is based on the grap...

  3. Surface analysis the principal techniques

    Vickerman, John C

    2009-01-01

    This completely updated and revised second edition of Surface Analysis: The Principal Techniques, deals with the characterisation and understanding of the outer layers of substrates, how they react, look and function which are all of interest to surface scientists. Within this comprehensive text, experts in each analysis area introduce the theory and practice of the principal techniques that have shown themselves to be effective in both basic research and in applied surface analysis. Examples of analysis are provided to facilitate the understanding of this topic and to show readers how they c

  4. Salary adjustments

    HR Department

    2008-01-01

    In accordance with decisions taken by the Finance Committee and Council in December 2007, salaries are adjusted with effect from 1 January 2008. Scale of basic salaries and scale of stipends paid to fellows (Annex R A 5 and R A 6 respectively): increased by 0.71% with effect from 1 January 2008. As a result of the stability of the Geneva consumer price index, the following elements do not increase: a)\tFamily Allowance, Child Allowance and Infant Allowance (Annex R A 3); b)\tReimbursement of education fees: maximum amounts of reimbursement (Annex R A 4.01) for the academic year 2007/2008. Related adjustments will be applied, wherever applicable, to Paid Associates and Students. As in the past, the actual percentage increase of each salary position may vary, due to the application of a constant step value and rounding effects. Human Resources Department Tel. 73566

  5. Salary adjustments

    HR Department

    2008-01-01

    In accordance with decisions taken by the Finance Committee and Council in December 2007, salaries are adjusted with effect from 1 January 2008. Scale of basic salaries and scale of stipends paid to fellows (Annex R A 5 and R A 6 respectively): increased by 0.71% with effect from 1 January 2008. As a result of the stability of the Geneva consumer price index, following elements do not increase: a) Family Allowance, Child Allowance and Infant Allowance (Annex R A 3). b) Reimbursement of education fees: maximum amounts of reimbursement (Annex R A 4.01) for the academic year 2007/2008. Related adjustments will be implemented, wherever applicable, to Paid Associates and Students. As in the past, the actual percentage increase of each salary position may vary, due to the application of a constant step value and the rounding effects. Human Resources Department Tel. 73566

  6. Adjustable collimator

    In a rotating fan beam tomographic scanner there is included an adjustable collimator and shutter assembly. The assembly includes a fan angle collimation cylinder having a plurality of different length slots through which the beam may pass for adjusting the fan angle of the beam. It also includes a beam thickness cylinder having a plurality of slots of different widths for adjusting the thickness of the beam. Further, some of the slots have filter materials mounted therein so that the operator may select from a plurality of filters. Also disclosed is a servo motor system which allows the operator to select the desired fan angle, beam thickness and filter from a remote location. An additional feature is a failsafe shutter assembly which includes a spring biased shutter cylinder mounted in the collimation cylinders. The servo motor control circuit checks several system conditions before the shutter is rendered openable. Further, the circuit cuts off the radiation if the shutter fails to open or close properly. A still further feature is a reference radiation intensity monitor which includes a tuning-fork shaped light conducting element having a scintillation crystal mounted on each tine. The monitor is placed adjacent the collimator between it and the source with the pair of crystals to either side of the fan beam

  7. Work Function Adjustment by Using Dipole Engineering for TaN-Al2O3-Si3N4-HfSiOx-Silicon Nonvolatile Memory

    Yu-Hsien Lin; Yi-Yun Yang

    2015-01-01

    This paper presents a novel TaN-Al2O3-HfSiOx-SiO2-silicon (TAHOS) nonvolatile memory (NVM) design with dipole engineering at the HfSiOx/SiO2 interface. The threshold voltage shift achieved by using dipole engineering could enable work function adjustment for NVM devices. The dipole layer at the tunnel oxide–charge storage layer interface increases the programming speed and provides satisfactory retention. This NVM device has a high program/erase (P/E) speed; a 2-V memory window can be achieve...

  8. Calculation procedure in GOLIA-FAME for pressure adjustment as a function of the compressibility of backfill

    Hamilton, L.F.M.

    1991-08-01

    In a repository for radioactive waste in a salt formation there are openings (boreholes and galleries) that are excavated or drilled in order to store the waste into the salt formation. After storage of the waste the remaining openings are backfilled with a salt mixture. The behaviour of the salt mixture is laid down in a relation between the volumetric compression rate of the mix and the compressive working on it. In this report a set of subroutines for the FE-code GOLIA-FAME is described which can be used to model the interaction between the salt and the backfill. An example is described and some numerical tests are presented. The subroutines can easily be implemented in the computer code GOLIA-FAME and can easily be adapted for other specific purposes than described in this report in which the deformation of the structure is related to a pressure change. In the future it will be investigated how the pressure adjustment can be implemented in the Runge-Kutta solution steps of GOLIA-FAME to improve the efficiency of the program. (author). 2 refs.; 9 figs.; 5 tabs.

  9. [The discharge adjustment of cancer patient with pain - the function of pharmacy and the role of pharmacist].

    Shiraishi, Takeya; Ebihara, Tsuyoshi; Kushida, Kazuki

    2010-12-01

    Cancer is the leading cause of death in Japan. The Cancer Control Act was established in June 2006 to advance a comprehensive and systematic approach to deal with cancer, and efforts are now promoting measures in accordance with local characteristics. We, pharmacies, have seen an increase in the number of patients receiving care at home. During the year from April 2009 to March 2010, 19 out of 24 new home-care patients receiving consultations(approximately 80%)were cancer patients. Excluding 4 cases from that number, opioids were used in 15 cases. In cases not permitting oral administration, a control of acute pain was achieved with the use of suppositories or fentanyl patches. However, there were some cases presented a difficulty in controlling acute pain other than an injection, Hence, an inpatient consultation was performed by other professionals. This paper reports the adjustments involving pharmacies in those 2 cases and problems in dealing with home care treatment along with future topics. PMID:21368516

  10. Variance Adjusted Actor Critic Algorithms

    Tamar, Aviv; Mannor, Shie

    2013-01-01

    We present an actor-critic framework for MDPs where the objective is the variance-adjusted expected return. Our critic uses linear function approximation, and we extend the concept of compatible features to the variance-adjusted setting. We present an episodic actor-critic algorithm and show that it converges almost surely to a locally optimal point of the objective function.

  11. Adjustment Policies in the United States

    Blandford, David

    2003-01-01

    Principal adjustment programs are reviewed unemployment insurance (UI) and related long-term programs for displaced workers, and trade adjustment assistance (TAA). None of these programs has had wide application in agriculture, although the current trade act contains a new program specifically for farmers.

  12. Principal dynamical components

    de la Iglesia, Manuel D

    2010-01-01

    A new procedure is proposed for the dimensional reduction of time series. Similarly to principal components, the procedure seeks a low-dimensional manifold that minimizes information loss. Unlike principal components, however, the new procedure involves dynamical considerations, through the proposal of a predictive dynamical model in the reduced manifold. Hence the minimization of the uncertainty is not only over the choice of a reduced manifold, as in principal components, but also over the parameters of the dynamical model. Further generalizations are provided to non-autonomous and non-Markovian scenarios, which are then applied to historical sea-surface temperature data.

  13. Family function, Parenting Style and Broader Autism Phenotype as Predicting Factors of Psychological Adjustment in Typically Developing Siblings of Children with Autism Spectrum Disorders.

    Mohammadreza Mohammadi

    2014-06-01

    Full Text Available Siblings of children with autism are at a greater risk of experiencing behavioral and social problems. Previous researches had focused on environmental variables such as family history of autism spectrum disorders (ASDs, behavior problems in the child with an ASD, parental mental health problems, stressful life events and "broader autism phenotype" (BAP, while variables like parenting style and family function that are shown to influence children's behavioral and psychosocial adjustment are overlooked. The aim of the present study was to reveal how parenting style and family function as well as BAP effect psychological adjustment of siblings of children with autism.The Participants included 65 parents who had one child with an Autism Spectrum Disorder and one typically developing child. Of the children with ASDs, 40 were boys and 25 were girls; and they were diagnosed with ASDs by a psychiatrist based on DSM-IV-TR criteria and Autism Diagnostic Interview-Revised (ADI-R. The Persian versions of the six scales were used to collect data from the families. Pearson's correlation test and regression analysis were used to determine which variables were related to the psychological adjustment of sibling of children with ASDs and which variables predicted it better.Significant relationships were found between Strengths and Difficulties Questionnaire (SDQ total difficulties, prosocial behaviors and ASDs symptoms severity, parenting styles and some aspects of family function. In addition, siblings who had more BAP characteristics had more behavior problems and less prosocial behavior. Behavioral problems increased and prosocial behavior decreased with permissive parenting style. Besides, both of authoritarian and authoritative parenting styles led to a decrease in behavioral problems and an increase in prosocial behaviors. Our findings revealed that some aspects of family function (affective responsiveness, roles, problem solving and behavior control were

  14. Auto Adjusting Astronomical Telescope

    Rohit R. Ghalsasi; Prof. N. D. Dhoot

    2014-01-01

    Astronomical telescope is powerful and basic tool for star or celestial observation. Here we proposed integrated system using Raspberry Pi for auto adjusting astronomical telescope. This integrated circuit helps to control stellar monitoring, stellar targeting, and tracking functions of telescope. Astro compass gives the direction of the celestial objects.

  15. Auto Adjusting Astronomical Telescope

    Rohit R. Ghalsasi

    2014-04-01

    Full Text Available Astronomical telescope is powerful and basic tool for star or celestial observation. Here we proposed integrated system using Raspberry Pi for auto adjusting astronomical telescope. This integrated circuit helps to control stellar monitoring, stellar targeting, and tracking functions of telescope. Astro compass gives the direction of the celestial objects.

  16. Implementation of Risk Adjustment for Medicare

    Ingber, Melvin J.

    2000-01-01

    The Health Care Financing Administration (HCFA) implemented risk adjustment for Medicare capitated organizations January 2000. The risk adjustment system used, the Principal Inpatient Diagnostic Cost Group (PIPDCG) method, had to be incorporated into the payment structure mandated by the Balanced Budget Act of 1997 (BBA). This article describes how risk adjustment was integrated into the payment system within the rules of the BBA, and how fee-for-service (FFS) and health maintenance organizat...

  17. Development and Uncertainty Quantification of Hurricane Surge Response Functions and Sea-Level Rise Adjustments for Coastal Bays

    Taylor, Nicholas Ramsey

    2014-01-01

    Reliable and robust methods of extreme value based hurricane surge prediction, such as the Joint Probability Method (JPM), are critical in the coastal engineering profession. The JPM has become the preferred surge hazard assessment method in the United States; however, it has a high computational cost: one location can require hundreds of simulated storms, and more than ten thousand computational hours to complete. Optimal sampling methods that use physics based surge response functions (SR...

  18. Research on the classifying and adjusting of urban function in Guangxi%广西城市职能分类与调整研究

    朱士鹏; 刘水源; 毛蒋兴

    2011-01-01

    Utilizing the statistic data of the statistical yearbook of Guizhou, this paper takes the urban basic economic activities as the confirming basis of the urban function by using the methods of Morre regression analysis and multi-variable clustering, carrying on the function classification to the 14 major cities in Guangxi, and classifying all cities into 5 categories, and four sub-categories. Based on this, we adopt the methods of Nelson statistical analysis to calculate intensity of urban function, and carry on the analysis to the urban function of each type. Finally, according to the above conclusion, the function adjustment scheme of the major cities in Guangxi is put forward.%采用统计年鉴数据资料,以城市基本经济活动为基础,运用Morre回归分析和多变量聚类分析方法,对广西14个主要城市进行职能分类,共分出5个大类,4个亚类.在此基础上,采用纳尔逊统计分析方法计算城市职能强度指数,对各个类型城市职能进行分析.根据上述结论,提出了广西主要城市职能调整方案.

  19. Adjustment, psychological functioning and health-related quality of life in adults with primary malignant brain tumours

    Baker, Paul

    2015-01-01

    The thesis has been prepared in a paper-based format and includes three papers: Paper 1, a systematic review; Paper 2, an empirical study; and Paper 3, a critical appraisal and reflection on the work.Paper 1 has been prepared for submission to Neuro-Oncology. The paper presents a systematic review of 21 studies concerning the relationships of demographic, clinical and mental health factors on health-related quality of life (HRQoL) and psychological functioning in adults with primary malignant...

  20. ADHD and autistic traits, family function, parenting style, and social adjustment for Internet addiction among children and adolescents in Taiwan: a longitudinal study.

    Chen, Yi-Lung; Chen, Sue-Huei; Gau, Susan Shur-Fen

    2015-04-01

    This longitudinal study investigated the prevalence, predictors, and related factors for Internet addiction among elementary and junior high school students in Taiwan. A convenient sample of grades 3, 5, and 8 students (n = 1153) was recruited from six elementary and one junior high schools. They were assessed during the beginning and the end of the spring semester of 2013. Internet addiction was examined by the Chen Internet Addiction Scale (CIAS). Other factors were screened using the Chinese version of the Autism Spectrum Quotient (AQ) for autistic trait, the Parental Bonding Instrument (PBI) for parenting, the Family APGAR for family support, the Social Adjustment Inventory for Children and Adolescents for social function, and the Swanson, Nolan, and Pelham, version IV scale (SNAP-IV) for ADHD symptoms. The prevalence of Internet addiction decreased from 11.4% to 10.6%. Male, low family support, poor social adjustment, and high ADHD-related symptoms were related to Internet addiction. However, there was an inverse relationship between autistic traits and Internet addiction. Further, its predictivity could be accounted by poor academic performance, male, and protective parenting style. Internet addiction is not uncommon among youths in Taiwan. The predictors identified in this study could be the specific measures for the development of a prevention program for Internet addiction in the youth population. PMID:25617844

  1. Principal chiral model on superspheres

    We investigate the spectrum of the principal chiral model (PCM) on odd-dimensional superspheres as a function of the curvature radius R. For volume-filling branes on S3verticalstroke2, we compute the exact boundary spectrum as a function of R. The extension to higher dimensional superspheres is discussed, but not carried out in detail. Our results provide very convincing evidence in favor of the strong-weak coupling duality between supersphere PCMs and OSP(2S+2 vertical stroke 2S) Gross-Neveu models that was recently conjectured by Candu and Saleur. (orig.)

  2. Principal chiral model on superspheres

    Mitev, V.; Schomerus, V. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Quella, T. [Amsterdam Univ. (Netherlands). Inst. for Theoretical Physics

    2008-09-15

    We investigate the spectrum of the principal chiral model (PCM) on odd-dimensional superspheres as a function of the curvature radius R. For volume-filling branes on S{sup 3} {sup vertical} {sup stroke} {sup 2}, we compute the exact boundary spectrum as a function of R. The extension to higher dimensional superspheres is discussed, but not carried out in detail. Our results provide very convincing evidence in favor of the strong-weak coupling duality between supersphere PCMs and OSP(2S+2 vertical stroke 2S) Gross-Neveu models that was recently conjectured by Candu and Saleur. (orig.)

  3. Multiscale principal component analysis

    Principal component analysis (PCA) is an important tool in exploring data. The conventional approach to PCA leads to a solution which favours the structures with large variances. This is sensitive to outliers and could obfuscate interesting underlying structures. One of the equivalent definitions of PCA is that it seeks the subspaces that maximize the sum of squared pairwise distances between data projections. This definition opens up more flexibility in the analysis of principal components which is useful in enhancing PCA. In this paper we introduce scales into PCA by maximizing only the sum of pairwise distances between projections for pairs of datapoints with distances within a chosen interval of values [l,u]. The resulting principal component decompositions in Multiscale PCA depend on point (l,u) on the plane and for each point we define projectors onto principal components. Cluster analysis of these projectors reveals the structures in the data at various scales. Each structure is described by the eigenvectors at the medoid point of the cluster which represent the structure. We also use the distortion of projections as a criterion for choosing an appropriate scale especially for data with outliers. This method was tested on both artificial distribution of data and real data. For data with multiscale structures, the method was able to reveal the different structures of the data and also to reduce the effect of outliers in the principal component analysis

  4. PRINCIPAL ISOTOPE SELECTION REPORT

    Utilizing nuclear fuel to produce power in commercial reactors results in the production of hundreds of fission product and transuranic isotopes in the spent nuclear fuel (SNF). When the SNF is disposed of in a repository, the criticality analyses could consider all of the isotopes, some principal isotopes affecting criticality, or none of the isotopes, other than the initial loading. The selected set of principal isotopes will be the ones used in criticality analyses of the SNF to evaluate the reactivity of the fuel/waste package composition and configuration. This technical document discusses the process used to select the principal isotopes and the possible affect that these isotopes could have on criticality in the SNF. The objective of this technical document is to discuss the process used to select the principal isotopes for disposal criticality evaluations with commercial SNF. The principal isotopes will be used as supporting information in the ''Disposal Criticality Analysis Methodology Topical Report'' which will be presented to the United States Nuclear Regulatory Commission (NRC) when approved by the United States Department of Energy (DOE) Office of Civilian Radioactive Waste Management (OCRWM)

  5. Effect of adjusting pulse durations of functional electrical stimulation cycling on energy expenditure and fatigue after spinal cord injury

    Ashraf S. Gorgey, MPT, PhD, FACSM

    2015-02-01

    Full Text Available The purpose of the current study was to determine the effects of three different pulse durations (200, 350, and 500 microseconds [P200, P350, and P500, respectively] on oxygen uptake, cycling performance, and energy expenditure (EE percentage of fatigue of the knee extensor muscle group immediately and 48 to 72 h after cycling in persons with spinal cord injury (SCI. A convenience sample of 10 individuals with motor complete SCI participated in a repeated-measures design using a functional electrical stimulation (FES cycle ergometer over a 3 wk period. There was no difference among the three FES protocols on relative oxygen uptake or cycling EE. Delta EE between exercise and rest was 42% greater in both P500 and P350 than in P200 (p = 0.07, whereas recovery oxygen uptake was 23% greater in P350 than in P200 (p = 0.03. There was no difference in the outcomes of the three pulse durations on muscle fatigue. Knee extensor torque significantly decreased immediately after (p < 0.001 and 48 to 72 h after (p < 0.001 FES leg cycling. Lengthening pulse duration did not affect submaximal or relative oxygen uptake or EE, total EE, and time to fatigue. Greater recovery oxygen updake and delta EE were noted in P350 and P500 compared with P200. An acute bout of FES leg cycling resulted in torque reduction that did not fully recover 48 to 72 h after cycling.

  6. Principals as Cultural Leaders

    Louis, Karen Seashore; Wahlstrom, Kyla

    2011-01-01

    Principals have a strong role to play in forming school cultures that encourage change. Changing a school's culture requires shared or distributed leadership and instructional leadership. A multiyear study found that three elements are necessary for a school culture that stimulates teachers to improve their instruction: 1) Teachers and…

  7. Principals as Classroom Leaders

    Bunting, Carolyn

    2007-01-01

    The author suggests five ways in which busy principals can indirectly demonstrate their classroom leadership by encouraging teacher specialization, giving teachers opportunities to present case studies of at-risk students, building a diverse intellectual climate, instituting an idea exchange, and scheduling time for teachers to openly discuss a…

  8. Principal noncommutative torus bundles

    Echterhoff, Siegfried; Nest, Ryszard; Oyono-Oyono, Herve

    2008-01-01

    of bivariant K-theory (denoted RKK-theory) due to Kasparov. Using earlier results of Echterhoff and Williams, we shall give a complete classification of principal non-commutative torus bundles up to equivariant Morita equivalence. We then study these bundles as topological fibrations (forgetting the...

  9. Resting-state functional magnetic resonance imaging of the subthalamic microlesion and stimulation effects in Parkinson's disease: Indications of a principal role of the brainstem

    Štefan Holiga

    2015-01-01

    Full Text Available During implantation of deep-brain stimulation (DBS electrodes in the target structure, neurosurgeons and neurologists commonly observe a “microlesion effect” (MLE, which occurs well before initiating subthalamic DBS. This phenomenon typically leads to a transitory improvement of motor symptoms of patients suffering from Parkinson's disease (PD. Mechanisms behind MLE remain poorly understood. In this work, we exploited the notion of ranking to assess spontaneous brain activity in PD patients examined by resting-state functional magnetic resonance imaging in response to penetration of DBS electrodes in the subthalamic nucleus. In particular, we employed a hypothesis-free method, eigenvector centrality (EC, to reveal motor-communication-hubs of the highest rank and their reorganization following the surgery; providing a unique opportunity to evaluate the direct impact of disrupting the PD motor circuitry in vivo without prior assumptions. Penetration of electrodes was associated with increased EC of functional connectivity in the brainstem. Changes in connectivity were quantitatively related to motor improvement, which further emphasizes the clinical importance of the functional integrity of the brainstem. Surprisingly, MLE and DBS were associated with anatomically different EC maps despite their similar clinical benefit on motor functions. The DBS solely caused an increase in connectivity of the left premotor region suggesting separate pathophysiological mechanisms of both interventions. While the DBS acts at the cortical level suggesting compensatory activation of less affected motor regions, the MLE affects more fundamental circuitry as the dysfunctional brainstem predominates in the beginning of PD. These findings invigorate the overlooked brainstem perspective in the understanding of PD and support the current trend towards its early diagnosis.

  10. A CMOS front-end for MPPC-based detectors aimed to TOF applications with fast discriminator, adjustable arming threshold and constant-fraction functionality

    We have designed and realized a Front-End chip for MPPC in standard CMOS 0.35μm technology. The channel presents a low input impedance in order to reduce as much as possible the recovery time of the sensor. This is achieved using the current domain for processing signals through the current conveyors (CCII) as building blocks of the channel. A current feed-back with low-pass filter has also been used to realize a sensitive improvement of the correction of the pile-up problem, in case of high repetition rate events. An independent arming threshold is available for each channel, providing the selection of the event through the peak level (proportional to the number of simultaneously hit pixels) reached by the signal. A constant-fraction functionality is present in order to reduce the well know time-walk problem. The delay in the correspondent branch is obtained by using an additional CCII block. The digital output of the discriminator channel has adjustable time width. The pilot chip is made up of five channels. All the values of the independent thresholds are stored in 10−bit registers as well as the values of the trigger output width and the main polarization current of the CCII blocks. All the registers are writable from a standard three-wire SPI. These features make the chip fully self-consistent. In this work we present and discuss the simulation results together with the preliminary test performed

  11. 音乐对幼儿"自闭症"的心理调适功能%Psychological Adjustment Function of Music for Children with "Autism"

    李媛

    2015-01-01

    Children"autism" is a psychological disease in clinical medicine in recent years, showing a growing trend. Music, as an au-ditory art, plays a psychological adjustment role for autistic children, even a therapeutic effect through its unique entertainment func-tion. This paper makes a discussion from the relationship between children autism and music, the growing environment of children with autism and the particularity of music itself, as well as the role and significance of music on autism.%幼儿"自闭症",是近年临床医学的心理性疾病,并呈现出日趋增长的态势. 音乐,作为一门听觉艺术,可以通过其专有的娱乐功能对幼儿"自闭症"心理上的孤僻起到一定的调适,进而达到治疗的效用. 本文从幼儿"自闭症"与音乐的关系,自闭症患儿成长的周围环境与音乐本身所具有的特殊性以及音乐对自闭症的作用和意义等多维度展开讨论.

  12. 音乐对幼儿"自闭症"的心理调适功能%Psychological Adjustment Function of Music for Children with "Autism"

    李媛

    2015-01-01

    幼儿"自闭症",是近年临床医学的心理性疾病,并呈现出日趋增长的态势. 音乐,作为一门听觉艺术,可以通过其专有的娱乐功能对幼儿"自闭症"心理上的孤僻起到一定的调适,进而达到治疗的效用. 本文从幼儿"自闭症"与音乐的关系,自闭症患儿成长的周围环境与音乐本身所具有的特殊性以及音乐对自闭症的作用和意义等多维度展开讨论.%Children"autism" is a psychological disease in clinical medicine in recent years, showing a growing trend. Music, as an au-ditory art, plays a psychological adjustment role for autistic children, even a therapeutic effect through its unique entertainment func-tion. This paper makes a discussion from the relationship between children autism and music, the growing environment of children with autism and the particularity of music itself, as well as the role and significance of music on autism.

  13. Principal Contradictions and Changes

    Wang Zaibang

    2006-01-01

    @@ The September 11 terrorist attacks are the most notable events that occurred since the end of the Cold War. It is not only a logical outcome of world development post Cold War but is also an important variable influencing world development. In order to evaluate the influence of the development of the international relations in these five years, the international background after the Cold War must be taken into consideration and the characteristics and changes of the three principal contradictions described below need to be understood.

  14. Adjustments and Depression

    Full Text Available ... to my SCI? How do I deal with depression and adjustment to my SCI? ☷ ▾ Page contents The ... the moment you are injured. Understanding adjustment and depression Adjustment to paralysis is a process of changing ...

  15. Perceptions of the Principal Evaluation Process and Performance Criteria: A Qualitative Study of the Challenge of Principal Evaluation

    Faginski-Stark, Erica; Casavant, Christopher; Collins, William; McCandless, Jason; Tencza, Marilyn

    2012-01-01

    Recent federal and state mandates have tasked school systems to move beyond principal evaluation as a bureaucratic function and to re-imagine it as a critical component to improve principal performance and compel school renewal. This qualitative study investigated the district leaders' and principals' perceptions of the performance…

  16. Principals' Supervision and Evaluation Cycles: Perspectives from Principals

    Hvidston, David J.; McKim, Courtney Ann; Mette, Ian M.

    2016-01-01

    The goals for this quantitative study were to examine principals' perceptions regarding supervision and evaluation within their own evaluations. Three research questions guided the inquiry: (1) What are the perceptions of principals' regarding their own supervision?; (2) What are the perceptions of principals' regarding their own evaluation?; and…

  17. Empirical Growth Curve Estimation Using Sigmoid Sub-functions that Adjust Seasonal Compensatory Growth for Male Body Weight of Thoroughbred Horses

    ONODA, Tomoaki; Yamamoto, Ryuta; SAWAMURA, Kyohei; INOUE, Yoshinobu; MATSUI, Akira; Miyake, Takeshi; Hirai, Nobuhiro

    2011-01-01

    Thoroughbred horses are seasonal mating animals, raised in northern regions or countries. Foals born yearly in spring generally show a typical seasonal compensatory growth pattern, in which their growth rate declines in the first winter and increases in the next spring. In this study, a new empirical adjustment approach is proposed to adjust for this compensatory growth when growth curve equations are estimated, by using 1,633 male body weights of Thoroughbreds as an illustrating example. Bas...

  18. School Principals' Emotional Coping Process

    Poirel, Emmanuel; Yvon, Frédéric

    2014-01-01

    The present study examines the emotional coping of school principals in Quebec. Emotional coping was measured by stimulated recall; six principals were filmed during a working day and presented a week later with their video showing stressful encounters. The results show that school principals experience anger because of reproaches from staff…

  19. Principals' Relationship with Computer Technology

    Brockmeier, Lantry L.; Sermon, Janet M.; Hope, Warren C.

    2005-01-01

    This investigation sought information about principals and their relationship with computer technology. Several questions were fundamental to the inquiry. Are principals prepared to facilitate the attainment of technology's promise through the integration of computer technology into the teaching and learning process? Are principals prepared to use…

  20. Metric adjusted skew information

    Hansen, Frank

    2008-01-01

    We extend the concept of Wigner-Yanase-Dyson skew information to something we call "metric adjusted skew information" (of a state with respect to a conserved observable). This "skew information" is intended to be a non-negative quantity bounded by the variance (of an observable in a state) that...... vanishes for observables commuting with the state. We show that the skew information is a convex function on the manifold of states. It also satisfies other requirements, proposed by Wigner and Yanase, for an effective measure-of-information content of a state relative to a conserved observable. We...... establish a connection between the geometrical formulation of quantum statistics as proposed by Chentsov and Morozova and measures of quantum information as introduced by Wigner and Yanase and extended in this article. We show that the set of normalized Morozova-Chentsov functions describing the possible...

  1. Le principe roman

    Ferrari, Jérôme

    2015-01-01

    Fasciné par la figure du physicien allemand Werner Heisenberg (1901-1976), fondateur de la mécanique quantique, inventeur du célèbre "principe d'incertitude" et Prix Nobel de physique en 1932, un jeune aspirant-philosophe désenchanté s'efforce, à l'aube du XXIe siècle, de considérer l'incomplétude de sa propre existence à l'aune des travaux et de la destinée de cet exceptionnel homme de sciences qui incarne pour lui la rencontre du langage scientifique et de la poésie, lesquels, chacun à leur manière, en ouvrant la voie au scandale de l'inédit, dessillent les yeux sur le monde pour en révéler la mystérieuse beauté que ne cessent de confisquer le matérialisme à l'œuvre dans l'Histoire des hommes.

  2. Principal oscillation patterns

    The Principal Oscillation Pattern (POP) analysis is a technique which is used to simultaneously infer the characteristic patterns and time scales of a vector time series. The POPs may be seen as the normal modes of a linearized system whose system matrix is estimated from data. The concept of POP analysis is reviewed. Examples are used to illustrate the potential of the POP technique. The best defined POPs of tropospheric day-to-day variability coincide with the most unstable modes derived from linearized theory. POPs can be derived even from a space-time subset of data. POPs are successful in identifying two independent modes with similar time scales in the same data set. The POP method can also produce forecasts which may potentially be used as a reference for other forecast models. The conventional POP analysis technique has been generalized in various ways. In the cyclostationary POP analysis, the estimated system matrix is allowed to vary deterministically with an externally forced cycle. In the complex POP analysis not only the state of the system but also its ''momentum'' is modeled. Associated correlation patterns are a useful tool to describe the appearance of a signal previously identified by a POP analysis in other parameters. (orig.)

  3. The course of neurocognitive functioning in first-episode psychosis and its relation to premorbid adjustment, duration of untreated psychosis, and relapse

    Rund, Bjørn Rishovd; Melle, Ingrid; Friis, Svein;

    2007-01-01

    -IV diagnosis of non-organic psychosis coming to their first treatment in the health care areas under study were included. Ultimately, 207 patients were assessed neuropsychologically at baseline, 138 were reassessed one year later, and 111 two years later. Five dimensions were identified through principal...

  4. COPD phenotype description using principal components analysis

    Roy, Kay; Smith, Jacky; Kolsum, Umme;

    2009-01-01

    BACKGROUND: Airway inflammation in COPD can be measured using biomarkers such as induced sputum and Fe(NO). This study set out to explore the heterogeneity of COPD using biomarkers of airway and systemic inflammation and pulmonary function by principal components analysis (PCA). SUBJECTS AND METH...

  5. Principal velocity surfaces in stellar dynamics

    Lynden-Bell, D.

    2016-05-01

    Recent work by An and Evans has revived interest in the coordinate surfaces that lie along the principal axes of the stress tensor. Here we complete our list of non-axially symmetric systems with local integrals and prove that those principal velocity surfaces exist for all systems with three local integrals. We then demonstrate how systems in non-separable potentials evade the Eddington-An theorem by having distribution functions that lack perfect reflection symmetry in a meridional velocity component, and discuss other consequences of this remarkable theorem.

  6. Adjustments and Depression

    Full Text Available ... adjustment and depression Adjustment to paralysis is a process of changing one's thoughts and feelings and is ... stem cell research? What is the clinical trials process? Get support Ask us anything Get a peer ...

  7. Adjustments and Depression

    Full Text Available ... depression and adjustment to my SCI? How do I deal with depression and adjustment to my SCI? ☷ ▾ ... following an SCI? What are the secondary conditions? I have no health insurance, what are my options? ...

  8. Annual Adjustment Factors

    Department of Housing and Urban Development — The Department of Housing and Urban Development establishes the rent adjustment factors - called Annual Adjustment Factors (AAFs) - on the basis of Consumer Price...

  9. Adjustments and Depression

    Full Text Available ... course an adjustment period as you navigate your new normal. The most important point to remember is ... to rebuild one's identity and to find a new balance in relationships. The stages of adjustment can ...

  10. Adjustable Optical-Fiber Attenuator

    Buzzetti, Mike F.

    1994-01-01

    Adjustable fiber-optic attenuator utilizes bending loss to reduce strength of light transmitted along it. Attenuator functions without introducing measurable back-reflection or insertion loss. Relatively insensitive to vibration and changes in temperature. Potential applications include cable television, telephone networks, other signal-distribution networks, and laboratory instrumentation.

  11. Comparison of Memory Function and MMPI-2 Profile between Post-traumatic Stress Disorder and Adjustment Disorder after a Traffic Accident

    Bae, Sung-Man; Hyun, Myoung-Ho; Lee, Seung-Hwan

    2014-01-01

    Objective Differential diagnosis between post-traumatic stress disorder (PTSD) and adjustment disorder (AD) is rather difficult, but very important to the assignment of appropriate treatment and prognosis. This study investigated methods to differentiate PTSD and AD. Methods Twenty-five people with PTSD and 24 people with AD were recruited. Memory tests, the Minnesota Multiphasic Personality Inventory 2 (MMPI-2), and Beck's Depression Inventory were administered. Results There were significan...

  12. Four Training Programs for Principals.

    Robbins, Pam; Gerritz, Bill

    1986-01-01

    This article describes the complex nature of the principal's job and discusses four programs that help principals acquire the skills needed to be successful. These programs are (1) Peer Assisted Leadership (PAL); (2) Cognitive Coaching; (3) Developmental Supervision; and (4) Differentiated Supervision. (MT)

  13. Time Management for New Principals

    Ruder, Robert

    2008-01-01

    Becoming a principal is a milestone in an educator's professional life. The principalship is an opportunity to provide leadership that will afford students opportunities to thrive in a nurturing and supportive environment. Despite the continuously expanding demands of being a new principal, effective time management will enable an individual to be…

  14. What Do Effective Principals Do?

    Protheroe, Nancy

    2011-01-01

    Much has been written during the past decade about the changing role of the principal and the shift in emphasis from manager to instructional leader. Anyone in education, and especially principals themselves, could develop a mental list of responsibilities that fit within each of these realms. But research makes it clear that both those aspects of…

  15. Burnout among Elementary School Principals

    Combs, Julie; Edmonson, Stacey L.; Jackson, Sherion H.

    2009-01-01

    As the understanding of burnout continues to be refined, studies that examine school principals and burnout will be helpful to those who provide support to school leaders and are concerned about principal attrition and pending shortages. The purpose of this study was to examine the relationship between burnout and gender, age, and years experience…

  16. Innovation Management Perceptions of Principals

    Bakir, Asli Agiroglu

    2016-01-01

    This study is aimed to determine the perceptions of principals about innovation management and to investigate whether there is a significant difference in this perception according to various parameters. In the study, descriptive research model is used and universe is consisted from principals who participated in "Acquiring Formation Course…

  17. MCCB warm adjustment testing concept

    Erdei, Z.; Horgos, M.; Grib, A.; Preradović, D. M.; Rodic, V.

    2016-08-01

    This paper presents an experimental investigation in to operating of thermal protection device behavior from an MCCB (Molded Case Circuit Breaker). One of the main functions of the circuit breaker is to assure protection for the circuits where mounted in for possible overloads of the circuit. The tripping mechanism for the overload protection is based on a bimetal movement during a specific time frame. This movement needs to be controlled and as a solution to control this movement we choose the warm adjustment concept. This concept is meant to improve process capability control and final output. The warm adjustment device design will create a unique adjustment of the bimetal position for each individual breaker, determined when the testing current will flow thru a phase which needs to trip in a certain amount of time. This time is predetermined due to scientific calculation for all standard types of amperages and complies with the IEC 60497 standard requirements.

  18. Principal -bundles on Nodal Curves

    Usha N Bhosle

    2001-08-01

    Let be a connected semisimple affine algebraic group defined over . We study the relation between stable, semistable -bundles on a nodal curve and representations of the fundamental group of . This study is done by extending the notion of (generalized) parabolic vector bundles to principal -bundles on the desingularization of and using the correspondence between them and principal -bundles on . We give an isomorphism of the stack of generalized parabolic bundles on with a quotient stack associated to loop groups. We show that if is simple and simply connected then the Picard group of the stack of principal -bundles on is isomorphic to ⊕ , being the number of components of .

  19. Principal Curves on Riemannian Manifolds

    Hauberg, Søren

    Curves from Hastie & Stuetzle to data residing on a complete Riemannian manifold. We show that for elliptical distributions in the tangent of spaces of constant curvature, the standard principal geodesic is a principal curve. The proposed model is simple to compute and avoids many of the pitfalls of...... to imply that the methods only work well when the manifold is mostly flat within the support of the generating distribution. We argue that instead of generalizing linear Euclidean models, it is more fruitful to generalize non-linear Euclidean models. Specifically, we extend the classic Principal...

  20. Repatriation Adjustment: Literature Review

    Gamze Arman

    2009-12-01

    Full Text Available Expatriation is a widely studied area of research in work and organizational psychology. After expatriates accomplish their missions in host countries, they return to their countries and this process is called repatriation. Adjustment constitutes a crucial part in repatriation research. In the present literature review, research about repatriation adjustment was reviewed with the aim of defining the whole picture in this phenomenon. Present research was classified on the basis of a theoretical model of repatriation adjustment. Basic frame consisted of antecedents, adjustment, outcomes as main variables and personal characteristics/coping strategies and organizational strategies as moderating variables.

  1. Theory of adaptive adjustment

    Weihong Huang

    2000-01-01

    Full Text Available Conventional adaptive expectation as a mechanism of stabilizing an unstable economic process is reexamined through a generalization to an adaptive adjustment framework. The generic structures of equilibria that can be stabilized through an adaptive adjustment mechanism are identified. The generalization can be applied to a broad class of discrete economic processes where the variables interested can be adjusted or controlled directly by economic agents such as in cobweb dynamics, Cournot games, Oligopoly markets, tatonnement price adjustment, tariff games, population control through immigration etc.

  2. Discrete Gliding Along Principal Curves

    Schröcker, Hans-Peter

    2010-01-01

    We consider $n$-dimensional discrete motions such that any two neighbouring positions correspond in a pure rotation ("rotating motions"). In the Study quadric model of Euclidean displacements these motions correspond to quadrilateral nets with edges contained in the Study quadric ("rotation nets"). The main focus of our investigation lies on the relation between rotation nets and discrete principal contact element nets. We show that every principal contact element net occurs in infinitely man...

  3. Principal modes in fiber amplifiers

    Fridman, Moti; Dubinskii, Mark; Friesem, Asher A; Davidson, Nir

    2010-01-01

    The dynamics of the state of polarization in single mode and multimode fiber amplifiers are presented. The experimental results reveal that although the state of polarizations at the output can vary over a large range when changing the temperatures of the fiber amplifiers, the variations are significantly reduced when resorting to the principal states of polarization in single mode fiber amplifiers and principal modes in multimode fiber amplifiers.

  4. Psychological Separation and Adjustment to College.

    Lapsley, Daniel K.; And Others

    1989-01-01

    Examined relationship between psychological separation and adjustment to college in freshmen (N=130) and upperclassmen (N=123). Found freshmen showed more psychological dependencies on parents than upperclassmen; separation appeared more strongly related to personal/emotional adjustment, particularly functional and emotional independence from…

  5. Does Charter Status Determine Preferences? Comparing the Hiring Preferences of Charter and Traditional Public School Principals

    Marisa Cannata; Mimi Engel

    2012-01-01

    The academic success of any school depends on its teachers. However, relatively little research exists on the qualities principals value in teacher hiring, and we know almost nothing about charter school principals’ preferences. This article addresses this gap in the literature using survey results for a matched sample of charter and traditional public school principals. We compare regression-adjusted survey responses of charter and traditional public school principals to examine whether char...

  6. ADJUSTABLE CHIP HOLDER

    2009-01-01

    An adjustable microchip holder for holding a microchip is provided having a plurality of displaceable interconnection pads for connecting the connection holes of a microchip with one or more external devices or equipment. The adjustable microchip holder can fit different sizes of microchips with ...

  7. Attracting Principals to the Superintendency

    Aimee Howley

    2002-10-01

    Full Text Available Responding to a perceived shortage of school superintendents in Ohio as well as elsewhere in the nation, this study examined the conditions of the job that make it attractive or unattractive as a career move for principals. The researchers surveyed a random sample of Ohio principals, receiving usable responses from 508 of these administrators. Analysis of the data revealed that principals perceived the ability to make a difference and the extrinsic motivators (e.g., salary and benefits associated with the superintendency as conditions salient to the decision to pursue such a job. Furthermore, they viewed the difficulties associated with the superintendency as extremely important. Among these difficulties, the most troubling were: (1 increased burden of responsibility for local, state, and federal mandates; (2 need to be accountable for outcomes that are beyond an educator’s control; (3 low levels of board support, and (4 excessive pressure to perform. The researchers also explored the personal and contextual characteristics that predisposed principals to see certain conditions of the superintendency as particularly attractive or particularly troublesome. Only two such characteristics, however, proved to be predictive: (1 principals with fewer years of teaching experience were more likely than their more experienced counterparts to rate the difficulty of the job as important to the decision to pursue a position as superintendent, and (2 principals who held cosmopolitan commitments were more likely than those who did not hold such commitments to view the salary and benefits associated with the superintendency as important. Findings from the study provided some guidance to those policy makers who are looking for ways to make the superintendency more attractive as a career move for principals. In particular, the study suggested that policy makers should work to design incentives that address school leaders’ interest in making a difference at the

  8. Income Gap Adjusting Function of Individual Income Tax and Its Optimization%个人所得税的收入差距调节功能及其优化

    翟继光

    2012-01-01

    One of the basic functions of individual income tax is to adjust the personal income gap. The modification of individual income tax law cannot enhance the function of personal income gap adjustment. The low proportion of individual income tax, the classified income tax system, the narrow scale of tax subject, and the uncritical punishing implementation all tax limits the function of individual income tax to adjust the personal income gap. We should transform the classified income tax system to comprehensive income tax system, establish a fair and scientific expense deduction system and comb the individual income tax preference policy comprehensively.%调节个人收入差距是个人所得税的基本功能之一。我国的《个人所得税法》历经数次修改,其收入分配调节功能在逐步增强。但由于对税制模式等问题没有进行大的改革,其收入分配调节功能仍有一定局限性。个人所得税收入比重过低、分类所得税制、征税对象范围狭窄、税法执行力度等问题都影响了个人所得税收入差距调节功能的发挥。为完善个人所得税制,应当改分类所得税制为综合所得税制,建立科学合理的费用扣除制度,全面梳理个人所得税税收优惠政策。

  9. Heterogeneous adjustment of employment and capital after factor market deregulation

    Eslava, Marcela; Haltiwanger, John; Kugler, Adriana; Kugler, Maurice

    2005-01-01

    In this paper, we analyze employment and capital adjustments using a panel of plants from Colombia. We allow for nonlinear adjustment of employment to reflect not only adjustment costs of labor but also adjustment costs of capital, and vice-versa. Using data from the Annual Manufacturing Survey, which include plant-level prices, we generate measures of plant-level productivity, demand shocks, and cost shocks, and use them to measure desired factor levels. We then estimate adjustment functions...

  10. Factor adjustments after deregulation: panel evidence from Colombian plants

    Eslava, Marcela; Haltiwanger, John; Adriana D. Kugler; Kugler, Maurice

    2005-01-01

    In this paper, we analyse employment and capital adjustments using a panel of plants from Colombia. We allow for nonlinear adjustment of employment to reflect not only adjustment costs of labour but also adjustment costs of capital, and vice-versa. Using data from the Annual Manufacturing Survey, which include plant-level prices, we generate measures of plant-level productivity, demand shocks, and cost shocks, and use them to measure desired factor levels. We then estimate adjustment function...

  11. Self-Adjusting Stack Machines

    Hammer, Matthew A; Chen, Yan; Acar, Umut A

    2011-01-01

    Self-adjusting computation offers a language-based approach to writing programs that automatically respond to dynamically changing data. Recent work made significant progress in developing sound semantics and associated implementations of self-adjusting computation for high-level, functional languages. These techniques, however, do not address issues that arise for low-level languages, i.e., stack-based imperative languages that lack strong type systems and automatic memory management. In this paper, we describe techniques for self-adjusting computation which are suitable for low-level languages. Necessarily, we take a different approach than previous work: instead of starting with a high-level language with additional primitives to support self-adjusting computation, we start with a low-level intermediate language, whose semantics is given by a stack-based abstract machine. We prove that this semantics is sound: it always updates computations in a way that is consistent with full reevaluation. We give a comp...

  12. Principal bundles the classical case

    Sontz, Stephen Bruce

    2015-01-01

    This introductory graduate level text provides a relatively quick path to a special topic in classical differential geometry: principal bundles.  While the topic of principal bundles in differential geometry has become classic, even standard, material in the modern graduate mathematics curriculum, the unique approach taken in this text presents the material in a way that is intuitive for both students of mathematics and of physics. The goal of this book is to present important, modern geometric ideas in a form readily accessible to students and researchers in both the physics and mathematics communities, providing each with an understanding and appreciation of the language and ideas of the other.

  13. Family Adjustment to Aphasia

    ... Public / Speech, Language and Swallowing / Disorders and Diseases Family Adjustment to Aphasia Richard S. was a senior manager ... It also presents a great challenge to the family. There may be tension among family members and ...

  14. Adjustments and Depression

    Full Text Available ... identity and to find a new balance in relationships. The stages of adjustment can include grieving, taking ... treatment options. Related pages What is a complete vs incomplete injury? What emergency procedures occur following an ...

  15. Adjustments and Depression

    Full Text Available ... thoughts and feelings and is something that takes time. The goal of adjusting is to rebuild one's ... updates about our impact > Get the Reeve newsletter International support > Pages in other languages Made with ♡ in ...

  16. Adjustments and Depression

    Full Text Available ... rebuild one's identity and to find a new balance in relationships. The stages of adjustment can include ... a peer mentor Advocate for change Fundraise with Team Reeve Champions Committee Volunteering About Us Our story ...

  17. Principals as Morally Accountable Leaders.

    Ehrich, Lisa Catherine

    2000-01-01

    Moral (rather than "corporate") accountability in education is essential; so is a human-centered leadership approach. Findings from an Australian study that investigated elementary principals' responsiveness to teachers' learning show how these leaders exercised their moral, professional, and contractual accountability to support a caring,…

  18. School Uniforms: Guidelines for Principals.

    Essex, Nathan L.

    2001-01-01

    Principals desiring to develop a school-uniform policy should involve parents, teachers, community leaders, and student representatives; beware restrictions on religious and political expression; provide flexibility and assistance for low-income families; implement a pilot program; align the policy with school-safety issues; and consider legal…

  19. On framed quantum principal bundles

    Durdevic, M

    1995-01-01

    A noncommutative-geometric formalism of framed principal bundles is sketched, in a special case of quantum bundles (over quantum spaces) possessing classical structure groups. Quantum counterparts of torsion operators and Levi-Civita type connections are analyzed. A construction of a natural differential calculus on framed bundles is described. Illustrative examples are presented.

  20. Occupational Adjustment of Immigrants

    Zorlu, Aslan

    2011-01-01

    This paper examines the speed of the occupational adjustment of immigrants using Labour Force Surveys 2004 and 2005 from Statistics Netherlands. The analysis provides new evidence that immigrants start with jobs at the lower levels of skill distribution. Their occupational achievement improves significantly with the duration of residence. The extent of this initial disadvantage and the rate of adjustment vary across immigrant groups according to the transferability of skills associated with t...

  1. KVA: Capital Valuation Adjustment

    Andrew Green; Chris Kenyon

    2014-01-01

    Credit (CVA), Debit (DVA) and Funding Valuation Adjustments (FVA) are now familiar valuation adjustments made to the value of a portfolio of derivatives to account for credit risks and funding costs. However, recent changes in the regulatory regime and the increases in regulatory capital requirements has led many banks to include the cost of capital in derivative pricing. This paper formalises the addition of cost of capital by extending the Burgard-Kjaer (2013) semi-replication approach to C...

  2. Ratios as a size adjustment in morphometrics.

    Albrecht, G H; Gelvin, B R; Hartman, S E

    1993-08-01

    Simple ratios in which a measurement variable is divided by a size variable are commonly used but known to be inadequate for eliminating size correlations from morphometric data. Deficiencies in the simple ratio can be alleviated by incorporating regression coefficients describing the bivariate relationship between the measurement and size variables. Recommendations have included: 1) subtracting the regression intercept to force the bivariate relationship through the origin (intercept-adjusted ratios); 2) exponentiating either the measurement or the size variable using an allometry coefficient to achieve linearity (allometrically adjusted ratios); or 3) both subtracting the intercept and exponentiating (fully adjusted ratios). These three strategies for deriving size-adjusted ratios imply different data models for describing the bivariate relationship between the measurement and size variables (i.e., the linear, simple allometric, and full allometric models, respectively). Algebraic rearrangement of the equation associated with each data model leads to a correctly formulated adjusted ratio whose expected value is constant (i.e., size correlation is eliminated). Alternatively, simple algebra can be used to derive an expected value function for assessing whether any proposed ratio formula is effective in eliminating size correlations. Some published ratio adjustments were incorrectly formulated as indicated by expected values that remain a function of size after ratio transformation. Regression coefficients incorporated into adjusted ratios must be estimated using least-squares regression of the measurement variable on the size variable. Use of parameters estimated by any other regression technique (e.g., major axis or reduced major axis) results in residual correlations between size and the adjusted measurement variable. Correctly formulated adjusted ratios, whose parameters are estimated by least-squares methods, do control for size correlations. The size-adjusted

  3. Cardiac MRI in children and adolescents who have undergone surgical repair of right-sided congenital heart disease. Automated left ventricular volumes and function analysis and effects of different manual adjustments

    Rompel, O.; Janka, R.; May, M.S.; Lell, M.M.; Uder, M.; Hammon, M. [University Hospital Erlangen (Germany). Dept. of Radiology; Gloeckler, M.; Dittrich, S. [University Hospital Erlangen (Germany). Dept. of Pediatric Cardiology; Cesnjevar, R. [University Hospital Erlangen (Germany). Dept. of Pediatric Cardiac Surgery

    2015-12-15

    To evaluate automated segmentation and the effects of different manual adjustments regarding left ventricular parameter quantification in cardiac magnetic resonance (MR) data on children and adolescents who have undergone surgical repair of right-sided congenital heart disease (CHD). Dedicated software (syngo.via, Siemens AG) was used to automatically segment and/or manually adjust the end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV), myocardial mass (MM) and ejection fraction (EF) before/after manual apex/base adjustment (ADJ-step 1) and after manual apex/base/myocardial contour adjustment (ADJ-step 2; reference standard). MR data of 40 patients (13.1 ± 3.1y, 4-17y) with repaired CHD with decreased pulmonary blood flow (CHD-DPBF) were evaluated. Intra- and inter-rater reliability was determined for 10 randomly selected patients. The software correctly detected the left ventricle in 38/40 (95 %) patients. EDV after automated segmentation: 119.1 ± 44.0ml; after ADJ-step 1: 115.8 ± 39.5 ml; after ADJ-step 2: 116.2 ± 39.4 ml. The corresponding results for ESV were 52.0 ± 18.5/49.6 ± 16.9/49.7 ± 16.4 ml; for SV 67.1 ± 28.5/66.2 ± 25.4/66.5 ± 25.5 ml; for EF 55.5 ± 7.3/56.7 ± 6.6/56.7 ± 6.3%; for MM 83.7 ± 35.9/76.2 ± 28.3/74.6 ± 27.2 g. Significant differences were found for ESV/MM/EF comparing the automated segmentation results with these after ADJ-step 1 and ADJ-step 2. No significant differences were found when comparing all results of ADJ-step 1 and ADJ-step 2 or when comparing EDV/SV results. Intra- and inter-rater reliability was excellent. The mean time effort was 63.4 ± 6.9 s for the automated segmentation, 74.2 ± 8.9 s for ADJ-step 1 and 269.5 ± 39.4 s for ADJ-step 2. Automated left ventricular volumes and function analysis in children and adolescents with surgically treated CHD proved to be feasible with excellent intra- and inter-rater reliability. Automated segmentation with manual apex/base adjustment provided

  4. Cardiac MRI in children and adolescents who have undergone surgical repair of right-sided congenital heart disease. Automated left ventricular volumes and function analysis and effects of different manual adjustments

    To evaluate automated segmentation and the effects of different manual adjustments regarding left ventricular parameter quantification in cardiac magnetic resonance (MR) data on children and adolescents who have undergone surgical repair of right-sided congenital heart disease (CHD). Dedicated software (syngo.via, Siemens AG) was used to automatically segment and/or manually adjust the end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV), myocardial mass (MM) and ejection fraction (EF) before/after manual apex/base adjustment (ADJ-step 1) and after manual apex/base/myocardial contour adjustment (ADJ-step 2; reference standard). MR data of 40 patients (13.1 ± 3.1y, 4-17y) with repaired CHD with decreased pulmonary blood flow (CHD-DPBF) were evaluated. Intra- and inter-rater reliability was determined for 10 randomly selected patients. The software correctly detected the left ventricle in 38/40 (95 %) patients. EDV after automated segmentation: 119.1 ± 44.0ml; after ADJ-step 1: 115.8 ± 39.5 ml; after ADJ-step 2: 116.2 ± 39.4 ml. The corresponding results for ESV were 52.0 ± 18.5/49.6 ± 16.9/49.7 ± 16.4 ml; for SV 67.1 ± 28.5/66.2 ± 25.4/66.5 ± 25.5 ml; for EF 55.5 ± 7.3/56.7 ± 6.6/56.7 ± 6.3%; for MM 83.7 ± 35.9/76.2 ± 28.3/74.6 ± 27.2 g. Significant differences were found for ESV/MM/EF comparing the automated segmentation results with these after ADJ-step 1 and ADJ-step 2. No significant differences were found when comparing all results of ADJ-step 1 and ADJ-step 2 or when comparing EDV/SV results. Intra- and inter-rater reliability was excellent. The mean time effort was 63.4 ± 6.9 s for the automated segmentation, 74.2 ± 8.9 s for ADJ-step 1 and 269.5 ± 39.4 s for ADJ-step 2. Automated left ventricular volumes and function analysis in children and adolescents with surgically treated CHD proved to be feasible with excellent intra- and inter-rater reliability. Automated segmentation with manual apex/base adjustment provided

  5. Family function, Parenting Style and Broader Autism Phenotype as Predicting Factors of Psychological Adjustment in Typically Developing Siblings of Children with Autism Spectrum Disorders.

    Mohammadreza Mohammadi; Hadi Zarafshan

    2014-01-01

    Objective Siblings of children with autism are at a greater risk of experiencing behavioral and social problems. Previous researches had focused on environmental variables such as family history of autism spectrum disorders (ASDs), behavior problems in the child with an ASD, parental mental health problems, stressful life events and “broader autism phenotype” (BAP), while variables like parenting style and family function that are shown to influence children’s behavioral and psychosocial adju...

  6. Principal component analysis for authorship attribution

    Amir Jamak

    2012-01-01

    Full Text Available Background: To recognize the authors of the texts by the use of statistical tools, one first needs to decide about the features to be used as author characteristics, and then extract these features from texts. The features extracted from texts are mostly the counts of so called function words. Objectives: The data extracted are processed further to compress as a data with less number of features, such a way that the compressed data still has the power of effective discriminators. In this case feature space has less dimensionality then the text itself. Methods/Approach: In this paper, the data collected by counting words and characters in around a thousand paragraphs of each sample book, underwent a principal component analysis performed using neural networks. Once the analysis was complete, the first of the principal components is used to distinguish the books authored by a certain author. Results: The achieved results show that every author leaves a unique signature in written text that can be discovered by analyzing counts of short words per paragraph. Conclusions: In this article we have demonstrated that based on analyzing counts of short words per paragraph authorship could be traced using principal component analysis. Methodology could be used for other purposes, like fraud detection in auditing.

  7. [Concept for a functional status and handicap-adjustment treatment and rehabilitation service chain in neurologic and neurosurgical management in Germany ("phase model")].

    Schupp, W

    1995-12-01

    The German medical service and social support network for patients with neurological diseases and disabilities are publicly criticized as inadequate. However, the German social laws give everybody the legal right to be admitted not only for acute medical treatment but also for rehabilitation measures if they are going to be disabled and at risk of becoming dependent on care or of losing the ability to work. Rehabilitation beginning in the early stage of illness is required. Institutions are now being built up to close the gap between acute medical treatment and the beginning of comprehensive rehabilitation, especially in those neurologically severely disabled patients who need "rehabilitation before care". As a basis for planning to improve the situation, a study group set up by the German Pension Insurance Association (Verband Deutscher Rentenversicherer) has developed the following concept of phases in neurological and neurosurgical treatment, rehabilitation and care. The aims and tasks of each phase are defined by the patient's functional status and requirements for recovery: 1. Acute medical treatment and care in intensive care units or normal clinical wards; 2. Early rehabilitation of patients who are not really conscious or cooperative and need intermediate care services should complications arise ("early rehabilitation"); 3. Rehabilitation of patients who are conscious and able to cooperate but depend upon care for functions in activities of daily living (ADL) ("comprehensive" or "post-primary rehabilitation"); 4. Rehabilitation of patients who are independent in ADL functions but need comprehensive treatment for further recovery ("medical rehabilitation" in a traditional sense); 5. Institutional or outpatient rehabilitational aftercare for vocational and/or social reintegration ("aftercare"); 6. Private or institutional care aimed at maintaining the patients' functional status ("permanent care"). Patients with severe traumatic brain injury or cerebral

  8. Principles of Principal Component Analysis

    Durham, Catherine A.; King, Robert P.

    2010-01-01

    With increasing frequency consumer studies are supplementing demographic and price variables with responses to an extended set of Likert-scale questions to elicit information on consumer motivations and attitudes. Principal compo­nent analysis (PCA) is a statistical tool that reduces a large number of variables to a smaller set of "components" that describe as much as possible of the variation in the original variables. Attitudinal responses can then be represented by component scores in sta...

  9. LA ADAPTACIÓN DE LAS SOCIEDADES COOPERATIVAS AL NUEVO PLAN GENERAL CONTABLE: ANÁLISIS DE LAS PRINCIPALES IMPLICACIONES ECONÓMICAS Y FINANCIERAS/THE ADJUSTMENT OF THE COOPERATIVE SOCIETIES TO THE NEW GENERAL ACCOUNTING PLAN: ANALYSIS OF THE PRINCIPAL ECONOMIC AND FINANCIAL IMPLICATIONS

    Javier ITURRIOZ DEL CAMPO

    2008-01-01

    Full Text Available La aprobación de la Ley 16/2007, de reforma y adaptación de la legislación mercantil en materia contable en España, así como del Plan General de Contabilidad, y del Plan General de Contabilidad para Pequeñas y Medianas Empresas, han permitido la incorporación de los nuevos criterios contables recogidos en la Normas Internacionales de Información Financiera (NIIF para dar respuesta al objetivo marcado desde la Unión Europa de favorecer la comparación de los estados contables elaborados en los distintos estados miembros, para contribuir así a incrementar la transparencia de los mercados en un entorno económico cada vez más global e internacional. No obstante, en el caso de las sociedades cooperativas, todavía está pendiente de publicación la correspondiente norma sectorial. Por ello, a lo largo de este trabajo se pretende analizar las implicaciones que tienen en las sociedades cooperativas tanto las novedades contables ya publicadas como los aspectos que deben ser fijados en la citada regulación sectorial atendiendo a sus características especiales. /The Law 16/2007, of reform and adjustment of the mercantile legislation about accounting in Spain, as well as of the General Plan of Accounting, and of the General Plan of Accounting for Small and Medium Companies, they have allowed the incorporation of the new accounting criteria gathered in International Financial Reporting Standards (IFRS to give response to the aim marked from the European Union of favouring the comparison of the accounting forms elaborated in the different member states, to help to increase this way the transparency of the markets in an economic environment increasingly globally and internationally. Nevertheless, in case of the cooperative societies, the sectorial normative has not been published. This work centres on the analysis of the implications that have in the cooperative societies so much the accounting innovations already published as the aspects that

  10. Recursos psicológicos e ajustamento pessoal frente à incapacidade funcional na velhice Psychological resources and personal adjustment for functional incapacity in aging

    Dóris Firmino Rabelo

    2005-12-01

    Full Text Available Diante do aumento da prevalência de condições crônicas na população idosa, crescente atenção é dada à identificação dos fatores psicológicos e sociais que podem afetar o bem-estar e a qualidade de vida de indivíduos mais velhos com incapacidades. Os recursos psicológicos e sociais de que o indivíduo dispõe são um caminho na determinação das implicações da incapacidade funcional na vida das pessoas afetadas. Esta revisão tem como objetivo apresentar algumas maneiras pelas quais os indivíduos enfrentam suas perdas em funções físicas e papéis sociais e a extensão em que os recursos psicológicos e sociais operam sobre os efeitos negativos das condições crônicas na qualidade de vida dos idosos. Entre as variáveis explanatórias apresentadas estão o suporte social, as crenças e estados emocionais positivos, a regulação afetiva, o mecanismo de comparação social, o senso de auto-eficácia percebida, o mecanismo de seleção-otimização-compensação e mecanismos de coping.Considering the increase of chronic conditions in the elderly people, more attention has been given to the identification of the psychological and social factors that can affect the well-being and the quality of life of individuals with incapacities. The psychological and social resources that the individual disposes are clues to determine the implications of the functional incapacity in the life of affected people. This review has the objective to present some ways which the individuals face their losses in physical functions and social roles, and in which extension the psychological and social resources operate over the negative effects of the chronic conditions in the elderly quality of life. Among the explainable variables presented there is the social support, the positive emotional states and beliefs, the affectionate regulation, the mechanism of social comparison, the sense of self-sufficiency, the selection

  11. Principal Investigator-in-a-Box

    Young, Laurence R.

    1999-01-01

    Human performance in orbit is currently limited by several factors beyond the intrinsic awkwardness of motor control in weightlessness. Cognitive functioning can be affected by such factors as cumulative sleep loss, stress and the psychological effects of long-duration small-group isolation. When an astronaut operates a scientific experiment, the performance decrement associated with such factors can lead to lost or poor quality data and even the total loss of a scientific objective, at great cost to the sponsors and to the dismay of the Principal Investigator. In long-duration flights, as anticipated on the International Space Station and on any planetary exploration, the experimental model is further complicated by long delays between training and experiment, and the large number of experiments each crew member must perform. Although no documented studies have been published on the subject, astronauts report that an unusually large number of simple errors are made in space. Whether a result of the effects of microgravity, accumulated fatigue, stress or other factors, this pattern of increased error supports the need for a computerized decision-making aid for astronauts performing experiments. Artificial intelligence and expert systems might serve as powerful tools for assisting experiments in space. Those conducting space experiments typically need assistance exactly when the planned checklist does not apply. Expert systems, which use bits of human knowledge and human methods to respond appropriately to unusual situations, have a flexibility that is highly desirable in circumstances where an invariably predictable course of action/response does not exist. Frequently the human expert on the ground is unavailable, lacking the latest information, or not consulted by the astronaut conducting the experiment. In response to these issues, we have developed "Principal Investigator-in-a-Box," or [PI], to capture the reasoning process of the real expert, the Principal

  12. Adjustable Fiber Optic Microwave Transversal Filters

    Shadaram, Mehdi; Lutes, George F.; Logan, Ronald T.; Maleki, Lutfollah

    1994-01-01

    Microwave transversal filters implemented as adjustable tapped fiber optic delay lines developed. Main advantages of these filters (in comparison with conventional microwave transversal filters) are small size, light weight, no need for matching of radio-frequency impedances, no need for shielding against electromagnetic radiation at suboptical frequencies, no need for mechanical tuning, high stability of amplitude and phase, and active control of transfer functions. Weights of taps in fiber optic delay lines adjusted.

  13. Sustainable urban regime adjustments

    Quitzau, Maj-Britt; Jensen, Jens Stissing; Elle, Morten;

    2013-01-01

    The endogenous agency that urban governments increasingly portray by making conscious and planned efforts to adjust the regimes they operate within is currently not well captured in transition studies. There is a need to acknowledge the ambiguity of regime enactment at the urban scale. This direc...

  14. Adjustments and Depression

    Full Text Available ... 7309 ☰ Living with Paralysis Get Support Get Involved Research Events Blog & Forum About Us Donate Living with Paralysis > Newly paralyzed > How do I deal with depression and adjustment to my SCI? How do I deal with depression and ...

  15. Sliding Mode Robustness Control Strategy for Shearer Height Adjusting System

    Xiuping Su

    2013-09-01

    Full Text Available This paper firstly established mathematical model of height adjusting hydro cylinder of the shearer, as well as the state space equation of the shearer height adjusting system. Secondly we designed a shearer automatic height adjusting controller adopting the sliding mode robustness control strategy. The height adjusting controller includes the sliding mode surface switching function based on Ackermann formula, as well as sliding mode control function with the improved butterworth filter. Then simulation of the height adjustment controller shows that the sliding mode robustness control solves buffeting of typical controller, and achieves automatic control for the rolling drum of the shearer.

  16. Mediation analysis with principal stratification.

    Gallop, Robert; Small, Dylan S; Lin, Julia Y; Elliott, Michael R; Joffe, Marshall; Ten Have, Thomas R

    2009-03-30

    In assessing the mechanism of treatment efficacy in randomized clinical trials, investigators often perform mediation analyses by analyzing if the significant intent-to-treat treatment effect on outcome occurs through or around a third intermediate or mediating variable: indirect and direct effects, respectively. Standard mediation analyses assume sequential ignorability, i.e. conditional on covariates the intermediate or mediating factor is randomly assigned, as is the treatment in a randomized clinical trial. This research focuses on the application of the principal stratification (PS) approach for estimating the direct effect of a randomized treatment but without the standard sequential ignorability assumption. This approach is used to estimate the direct effect of treatment as a difference between expectations of potential outcomes within latent subgroups of participants for whom the intermediate variable behavior would be constant, regardless of the randomized treatment assignment. Using a Bayesian estimation procedure, we also assess the sensitivity of results based on the PS approach to heterogeneity of the variances among these principal strata. We assess this approach with simulations and apply it to two psychiatric examples. Both examples and the simulations indicated robustness of our findings to the homogeneous variance assumption. However, simulations showed that the magnitude of treatment effects derived under the PS approach were sensitive to model mis-specification. PMID:19184975

  17. Female Traditional Principals and Co-Principals: Experiences of Role Conflict and Job Satisfaction

    Eckman, Ellen Wexler; Kelber, Sheryl Talcott

    2010-01-01

    This paper presents a secondary analysis of survey data focusing on role conflict and job satisfaction of 102 female principals. Data were collected from 51 female traditional principals and 51 female co-principals. By examining the traditional and co-principal leadership models as experienced by female principals, this paper addresses the impact…

  18. Genetic variants associated with lung function

    Thyagarajan, Bharat; Wojczynski, Mary; Minster, Ryan L;

    2014-01-01

    with exceptional longevity have not been identified. METHOD: We conducted a genome wide association study (GWAS) to identify novel genetic variants associated with lung function in the Long Life Family Study (LLFS) (n = 3,899). Replication was performed using data from the CHARGE/SpiroMeta consortia....... The association between SNPs and FEV1 and FEV1/FVC was analyzed using a linear mixed effects model adjusted for age, age2, sex, height, field center, ancestry principal components and kinship structure to adjust for family relationships separately for ever smokers and never smokers. In the linkage...

  19. Credit Valuation Adjustment

    Hoffman, Frederick

    2011-01-01

    Credit risk has become a topical issue since the 2007 Credit Crisis, particularly for its impact on the valuation of OTC derivatives. This becomes critical when the credit risk of entities involved in a contract either as underlying or counterparty become highly correlated as is the case during macroeconomic shocks. It impacts the valuation of such contracts through an additional term, the credit valuation adjustment (CVA). This can become large with such correlation. This thesis outlines the...

  20. Adjustable Autonomy Testbed

    Malin, Jane T.; Schrenkenghost, Debra K.

    2001-01-01

    The Adjustable Autonomy Testbed (AAT) is a simulation-based testbed located in the Intelligent Systems Laboratory in the Automation, Robotics and Simulation Division at NASA Johnson Space Center. The purpose of the testbed is to support evaluation and validation of prototypes of adjustable autonomous agent software for control and fault management for complex systems. The AA T project has developed prototype adjustable autonomous agent software and human interfaces for cooperative fault management. This software builds on current autonomous agent technology by altering the architecture, components and interfaces for effective teamwork between autonomous systems and human experts. Autonomous agents include a planner, flexible executive, low level control and deductive model-based fault isolation. Adjustable autonomy is intended to increase the flexibility and effectiveness of fault management with an autonomous system. The test domain for this work is control of advanced life support systems for habitats for planetary exploration. The CONFIG hybrid discrete event simulation environment provides flexible and dynamically reconfigurable models of the behavior of components and fluids in the life support systems. Both discrete event and continuous (discrete time) simulation are supported, and flows and pressures are computed globally. This provides fast dynamic simulations of interacting hardware systems in closed loops that can be reconfigured during operations scenarios, producing complex cascading effects of operations and failures. Current object-oriented model libraries support modeling of fluid systems, and models have been developed of physico-chemical and biological subsystems for processing advanced life support gases. In FY01, water recovery system models will be developed.

  1. Physicians' adjustment to retirement.

    Virshup, B; Coombs, R H

    1993-01-01

    We address the questions, How do physicians adjust to and enjoy their retirement? What factors contribute to the well-being of retired physicians? A 60-item questionnaire mailed to 238 retired physicians in Los Angeles County with a 41.6% response rate assessed health, standard of living, relationships, activities, emotional difficulties, and general enjoyment. Health often improved after retirement, as did relationships with spouses and children. Standard of living was comfortable or better ...

  2. Nonlinear principal component analysis of climate data

    Boyle, J.; Sengupta, S.

    1995-06-01

    This paper presents the details of the nonlinear principal component analysis of climate data. Topic discussed include: connection with principal component analysis; network architecture; analysis of the standard routine (PRINC); and results.

  3. A New Look at Principal Evaluation

    Clifford, Matthew; Ross, Steven

    2013-01-01

    This article describes various aspects of school principal evaluation. The authors note that many states and school districts use evaluations that do not consider existing standards for principals or proven practices. It asserts that principal evaluations must be tools for professional capacity building that leads to improved teaching and…

  4. Teacher Supervision Practices and Principals' Characteristics

    April, Daniel; Bouchamma, Yamina

    2015-01-01

    A questionnaire was used to determine the individual and collective teacher supervision practices of school principals and vice-principals in Québec (n = 39) who participated in a research-action study on pedagogical supervision. These practices were then analyzed in terms of the principals' sociodemographic and socioprofessional characteristics…

  5. Principals' Collaborative Roles as Leaders for Learning

    Kitchen, Margaret; Gray, Susan; Jeurissen, Maree

    2016-01-01

    This article draws on data from three multicultural New Zealand primary schools to reconceptualize principals' roles as leaders for learning. In doing so, the writers build on Sinnema and Robinson's (2012) article on goal setting in principal evaluation. Sinnema and Robinson found that even principals hand-picked for their experience fell short on…

  6. Preparing Politically Savvy Principals in Ontario, Canada

    Winton, Sue; Pollock, Katina

    2013-01-01

    Purpose: The aim of the paper is to argue that principal preparation programs should help candidates: recognize the political role of the school principal; develop political skills (including the ability to strategically appropriate policy); and understand that the political approach of the principal influences teaching, learning, relationships,…

  7. Improving Principal Leadership through Feedback and Coaching

    Bickman, Leonard; Goldring, Ellen; De Andrade, Ana Regina; Breda, Carolyn; Goff, Peter

    2012-01-01

    The purpose of this study is to evaluate the efficacy of a feedback and coaching intervention designed to improve the quality of principal leadership. Principals received feedback from teachers on their instructional leadership, and their teachers' trust of them. Principals also provided self-ratings and they compared their teachers' ratings to…

  8. Nonlinear Principal Component Analysis Using Strong Tracking Filter

    2007-01-01

    The paper analyzes the problem of blind source separation (BSS) based on the nonlinear principal component analysis (NPCA) criterion. An adaptive strong tracking filter (STF) based algorithm was developed, which is immune to system model mismatches. Simulations demonstrate that the algorithm converges quickly and has satisfactory steady-state accuracy. The Kalman filtering algorithm and the recursive leastsquares type algorithm are shown to be special cases of the STF algorithm. Since the forgetting factor is adaptively updated by adjustment of the Kalman gain, the STF scheme provides more powerful tracking capability than the Kalman filtering algorithm and recursive least-squares algorithm.

  9. Integrating Data Transformation in Principal Components Analysis

    Maadooliat, Mehdi

    2015-01-02

    Principal component analysis (PCA) is a popular dimension reduction method to reduce the complexity and obtain the informative aspects of high-dimensional datasets. When the data distribution is skewed, data transformation is commonly used prior to applying PCA. Such transformation is usually obtained from previous studies, prior knowledge, or trial-and-error. In this work, we develop a model-based method that integrates data transformation in PCA and finds an appropriate data transformation using the maximum profile likelihood. Extensions of the method to handle functional data and missing values are also developed. Several numerical algorithms are provided for efficient computation. The proposed method is illustrated using simulated and real-world data examples.

  10. Jordan Adjusted Human Development

    Ababsa, Myriam

    2014-01-01

    Jordan Human Development Index (HDI) and Adjusted Human Development Index (IHDI) In 1990, the United Nations Development Programme designed a Human Development Index composed of life expectancy at birth, level of education and gross domestic product (GDP) per capita. In 2011, the UNDP ranked Jordan 95th out of 187 countries with a human development index of 0.698, up from 0.591 in 1990, making it the leading medium-range country for human development (fig. VIII.1). In 2010, the inequality adj...

  11. A computerized adjustable brain atlas

    A computerized brain atlas, adjustable to the patients anatomy, has been developed. It is primarily intended for use in positron emission tomography, but may also be employed in other fields utilizing neuro imaging, such as sterotactic surgery, transmission computerized tomography (CT) and magnetic resonance imaging (MRI). The atlas is based on anatomical information obtained from digitized cryosectioned brains. It can be adjusted to fit a wide range of images from individual brains with normal anatomy. The corresponding transformation is chosen so that the modified atlas agrees with a set of CT or NMR images of the patient. The computerized atlas can be used to improve the quantification and evaluation of PET data by: Aiding and improving the selection of regions of interests. Facilitating comparisons of functional image data from different individuals or groups of individuals. Facilitating the comparison of different examinations of the same patient, thus reducing the need of reproducible fixation systems. Providing external a priori anatomical information to be used in the image reconstruction. Improving the attenuation and scatter corrections. Aiding in selecting a suitable patient orientation during the PET study. By applying the inverse atlas transformation to PET data set it is possible to relate the PET information to the anatomy of the reference atlas. Reformatted PET data from different patients can thus be averaged, and averages from different categories of patients can be compared. The method will facilitate the identification of statistically significant differences in the PET information from different groups of patients. (orig.)

  12. Simplicial principal bundles in parametrized spaces

    Roberts, David M

    2012-01-01

    In this paper, motivated by recent interest in higher gauge theory, we prove that the fiberwise geometric realization functor takes a certain class of simplicial principal bundles in a suitable category of spaces over a fixed space $B$ to fiberwise principal bundles. As an application we show that the fiberwise geometric realization of the universal simplicial principal bundle for a simplicial group $G$ in the category of spaces over $B$ gives rise to a fiberwise principal bundle with structure group $|G|$. An application to classifying theory for fiberwise principal bundles is described.

  13. Continuously adjustable Pulfrich spectacles

    Jacobs, Ken; Karpf, Ron

    2011-03-01

    A number of Pulfrich 3-D movies and TV shows have been produced, but the standard implementation has inherent drawbacks. The movie and TV industries have correctly concluded that the standard Pulfrich 3-D implementation is not a useful 3-D technique. Continuously Adjustable Pulfrich Spectacles (CAPS) is a new implementation of the Pulfrich effect that allows any scene containing movement in a standard 2-D movie, which are most scenes, to be optionally viewed in 3-D using inexpensive viewing specs. Recent scientific results in the fields of human perception, optoelectronics, video compression and video format conversion are translated into a new implementation of Pulfrich 3- D. CAPS uses these results to continuously adjust to the movie so that the viewing spectacles always conform to the optical density that optimizes the Pulfrich stereoscopic illusion. CAPS instantly provides 3-D immersion to any moving scene in any 2-D movie. Without the glasses, the movie will appear as a normal 2-D image. CAPS work on any viewing device, and with any distribution medium. CAPS is appropriate for viewing Internet streamed movies in 3-D.

  14. Premorbid adjustment and previous personality in schizophrenic patients

    José Juan Rodríguez Solano

    2005-12-01

    Full Text Available Psychosocial adjustment and premorbid personality are two factors that are frequently studied in order to elucidate the etiopathogenesis of schizophrenia. Premorbid adjustment alterations and personality disorders (principally those of the schizophrenia spectrum have been considered vulnerability elements or have been linked with the early manifestations of a disease that is still underdeveloped (hypothesis of neurodevelopment. In this paper we review the literature. We also studied the relationship between premorbid adjustment (PAS scale and previous personality disorders (SCID-II in a sample of 40 patients with schizophrenia (DSM-III-R, DSM-IV, CIE-10, and statistically correlated them. The results show that premorbid adjustment correlates with avoidant, schizotypal and schizoid personality disorders: the more personality pathology found, the poorer is the premorbid psychosocial adjustment. Premorbid adjustment positively correlates with histrionic personality traits. The pathological traits of schizotypal and schizoid personalities account for up to 77% of the variance of the total premorbid adjustment in schizophrenic patients. Conclusion: The degrees of premorbid adjustment in schizophrenia are related to the different premorbid personality disorders of schizophrenic patients, which are mainly those most genetically related with schizophrenia, that is, the spectrum of the schizophrenia.

  15. Integrating Activity-Based Costing with Target Costing and Principal-Agent Incentives

    Xiaoyuan Huang; Lijun Li; Liping Yu

    2009-01-01

    The current studies of cost management mainly focus on the cost control of transactions and activities, which is a basic function of cost management. This paper analyzes activity-based costing (ABC) and principal-agent incentives, and target costing (TC) and principal-agent incentives with regard to both functional and institutional aspects of cost management in agent theory framework, and reaches the point that a integration of activity-based costing and target costing based on principal-age...

  16. The Design of Fiscal Adjustments

    Alesina, Alberto Francesco; Ardagna, Silvia

    2013-01-01

    This paper offers three results. First, in line with the previous literature, we confirm that fiscal adjustments based mostly on the spending side are less likely to be reversed. Second, spending based fiscal adjustments have caused smaller recessions than tax based fiscal adjustments. Finally, certain combinations of policies have made it possible for spending based fiscal adjustments to be associated with growth in the economy even on impact rather than with a recession. Thus, expansionary ...

  17. Adjusting to the Emergent

    Revsbæk, Line

    In her doctoral thesis Line Revsbaek explores newcomer innovation related to organizational entry processes in a changing organization. She introduces process philosophy and complexity theory to research on organizational socialization and newcomer innovation. The study challenges assumptions...... in standardized induction programs where newcomers are cast in roles as insecure novices needing to be “taught the ropes” of the organizational culture. Linked with this, it is suggested that the prevailing dichotomy of ‘newcomer assimilation’ versus ‘organizational accommodation’ is replaced with a notion...... of ‘adjusting to the emergent’. Newcomer innovation is portrayed as carrying a variety of possible significations, such as unintentional innovation effects of newcomer’s proactive self-socializing behavior; an inspirational basis for designing innovation-generating employee induction; ‘resonant instances...

  18. APPRIS: annotation of principal and alternative splice isoforms.

    Rodriguez, Jose Manuel; Maietta, Paolo; Ezkurdia, Iakes; Pietrelli, Alessandro; Wesselink, Jan-Jaap; Lopez, Gonzalo; Valencia, Alfonso; Tress, Michael L

    2013-01-01

    Here, we present APPRIS (http://appris.bioinfo.cnio.es), a database that houses annotations of human splice isoforms. APPRIS has been designed to provide value to manual annotations of the human genome by adding reliable protein structural and functional data and information from cross-species conservation. The visual representation of the annotations provided by APPRIS for each gene allows annotators and researchers alike to easily identify functional changes brought about by splicing events. In addition to collecting, integrating and analyzing reliable predictions of the effect of splicing events, APPRIS also selects a single reference sequence for each gene, here termed the principal isoform, based on the annotations of structure, function and conservation for each transcript. APPRIS identifies a principal isoform for 85% of the protein-coding genes in the GENCODE 7 release for ENSEMBL. Analysis of the APPRIS data shows that at least 70% of the alternative (non-principal) variants would lose important functional or structural information relative to the principal isoform. PMID:23161672

  19. Leader Voices: Principals Reflect on the Evolution of Their Leadership

    Marcellus, Angela; Flores, Matt; Craig, Anthony

    2012-01-01

    More than a decade of school leadership research from The Wallace Foundation highlights not only the critical role of the principal but also the practices that effective school leaders undertake. A recent brief (The Wallace Foundation, 2011) distills these practices into five key functions: (1) Shape a vision of academic success for all students;…

  20. Non-leading Logarithms in Principal Value Resummation

    Alvero, L.; Contopanagos, H.

    1994-01-01

    We apply the method of principal value resummation of large momentum-dependent radiative corrections to the calculation of the Drell Yan cross section. We sum all next-to-leading logarithms and provide numerical results for the resummed exponent and the corresponding hard scattering function.

  1. A New Principal for Tchikobou High School: Resistance to Change

    Boncana, Mohomodou; Crow, Gary M.

    2008-01-01

    This case study explains the functional or practical difficulties that many organizations face when they change their leaders. By describing the experiences of the two principals, two distinct styles of leadership are displayed, each of which provides the reader with the opportunity to understand some aspects of frames in organizations:…

  2. Principal Succession and the Micropolitics of Educators in Schools: Some Incidental Results from a Larger Study

    Meyer, Matthew J.; Macmillan, Robert B.

    2011-01-01

    Principal turnover has the potential to impact seriously school morale and values as teachers attempt to adjust to new administrators and their possible shifts in focus. In an era of mandated school improvement, teachers in schools with new administrators have to deal not only with changes in district, state and/or provincial policies, but also…

  3. High School Administrative Staffing in Washington State: Principal Perspectives on Resource Needs and Utilization

    Steach, John C.

    2011-01-01

    This mixed methods study explored how high school principals prioritize their work and utilize available human resources to adjust to inadequate administrative staffing. Analysis of staffing levels across the state of Washington and specifically inside two eastern Washington districts framed interview questions for central office administration…

  4. The Perfect Principal: A Teacher's Fantasy.

    Webb, Diana

    1985-01-01

    Briefly describes the perfect principal's leadership, consciousness of human relations, charisma, visibility, high standards, positive attitude, openness, organization, consistency, and involvement in professional activities. (PGD)

  5. On Multilinear Principal Component Analysis of Order-Two Tensors

    Hung, Hung; Tu, I-Ping; Huang, Su-Yun

    2011-01-01

    Principal Component Analysis (PCA) is a commonly used tool for dimension reduction in analyzing high dimensional data; Multilinear Principal Component Analysis (MPCA) has the potential to serve the similar function for analyzing tensor structure data. MPCA and other tensor decomposition methods have been proved effective to reduce the dimensions for both real data analyses and simulation studies (Ye, 2005; Lu, Plataniotis and Venetsanopoulos, 2008; Kolda and Bader, 2009; Li, Kim and Altman, 2010). In this paper, we investigate MPCA's statistical properties and provide explanations for its advantages. Conventional PCA, vectorizing the tensor data, may lead to inefficient and unstable prediction due to its extremely large dimensionality. On the other hand, MPCA, trying to preserve the data structure, searches for low-dimensional multilinear projections and decreases the dimensionality efficiently. The asymptotic theories for order-two MPCA, including asymptotic distributions for principal components, associated...

  6. Sparse logistic principal components analysis for binary data

    Lee, Seokho

    2010-09-01

    We develop a new principal components analysis (PCA) type dimension reduction method for binary data. Different from the standard PCA which is defined on the observed data, the proposed PCA is defined on the logit transform of the success probabilities of the binary observations. Sparsity is introduced to the principal component (PC) loading vectors for enhanced interpretability and more stable extraction of the principal components. Our sparse PCA is formulated as solving an optimization problem with a criterion function motivated from a penalized Bernoulli likelihood. A Majorization-Minimization algorithm is developed to efficiently solve the optimization problem. The effectiveness of the proposed sparse logistic PCA method is illustrated by application to a single nucleotide polymorphism data set and a simulation study. © Institute ol Mathematical Statistics, 2010.

  7. Optimal interface between principal deterrent systems and material accounting

    The purpose of this study is to find an optimal blend between three safeguards systems for special nuclear material (SNM), the material accounting system and the physical security and material control systems. The latter two are denoted as principal deterrent systems. The optimization methodology employed is a two-stage decision algorithm, first an explicit maximization of expected diverter benefits and subsequently a minimization of expected defender costs for changes in material accounting procedures and incremental improvements in the principal deterrent systems. The probability of diverter success function dependent upon the principal deterrents and material accounting system variables is developed. Within the range of certainty of the model, existing material accounting, material control and physical security practices are justified

  8. Delay Adjusted Incidence Infographic

    This Infographic shows the National Cancer Institute SEER Incidence Trends. The graphs show the Average Annual Percent Change (AAPC) 2002-2011. For Men, Thyroid: 5.3*,Liver & IBD: 3.6*, Melanoma: 2.3*, Kidney: 2.0*, Myeloma: 1.9*, Pancreas: 1.2*, Leukemia: 0.9*, Oral Cavity: 0.5, Non-Hodgkin Lymphoma: 0.3*, Esophagus: -0.1, Brain & ONS: -0.2*, Bladder: -0.6*, All Sites: -1.1*, Stomach: -1.7*, Larynx: -1.9*, Prostate: -2.1*, Lung & Bronchus: -2.4*, and Colon & Rectum: -3/0*. For Women, Thyroid: 5.8*, Liver & IBD: 2.9*, Myeloma: 1.8*, Kidney: 1.6*, Melanoma: 1.5, Corpus & Uterus: 1.3*, Pancreas: 1.1*, Leukemia: 0.6*, Brain & ONS: 0, Non-Hodgkin Lymphoma: -0.1, All Sites: -0.1, Breast: -0.3, Stomach: -0.7*, Oral Cavity: -0.7*, Bladder: -0.9*, Ovary: -0.9*, Lung & Bronchus: -1.0*, Cervix: -2.4*, and Colon & Rectum: -2.7*. * AAPC is significantly different from zero (p<.05). Rates were adjusted for reporting delay in the registry. www.cancer.gov Source: Special section of the Annual Report to the Nation on the Status of Cancer, 1975-2011.

  9. The Learning Principal. Volume 6, Number 1

    Armstrong, Anthony, Ed.

    2010-01-01

    "The Learning Principal" is an eight-page newsletter published eight times a year. It focuses on the important and unique work of school principals. This issue includes: (1) Taking Action on Equity (Anthony Armstrong); (2) School Leadership: Just How Forward Thinking Are You? (Frederick Brown); (3) From the Research: Leadership Practices that Make…

  10. Multidimensional Perspectives on Principal Leadership Effectiveness

    Beycioglu, Kadir, Ed.; Pashiardis, Petros, Ed.

    2015-01-01

    Exceptional management skills are crucial to success in educational environments. As school leaders, principals are expected to effectively supervise the school system while facing a multitude of issues and demands. "Multidimensional Perspectives on Principal Leadership Effectiveness" combines best practices and the latest approaches in…

  11. Professional Development: Perceptions of Benefits for Principals

    Blaik Hourani, Rida; Stringer, Patricia

    2015-01-01

    Schools in Abu Dhabi are going through change and reform. Abu Dhabi Education Council (ADEC) has initiated professional development for principals to facilitate change and school improvement. This paper explores principals' perception on the benefits of professional development received in light of managing school change and reforms.…

  12. Permutation Tests in Principal Component Analysis.

    Pohlmann, John T.; Perkins, Kyle; Brutten, Shelia

    Structural changes in an English as a Second Language (ESL) 30-item reading comprehension test were examined through principal components analysis on a small sample (n=31) of students. Tests were administered on three occasions during intensive ESL training. Principal components analysis of the items was performed for each test occasion.…

  13. Principals as Partners: Counselors as Collaborators

    Dahir, Carol A.; Burnham, Joy J.; Stone, Carolyn B.; Cobb, Nicole

    2010-01-01

    School principals and school counselors have the ability to forge a unique collaborative relationship to improve student achievement. Historically, school counselors have altered the primary focus of their work as deemed by the perspective of their principals. With an emphasis on improving student success in school, this study revealed the…

  14. Contextual Factors Related to Elementary Principal Turnover

    Partlow, Michelle C.

    2007-01-01

    The issue of school leadership instability and how it affects schools and student achievement has been studied. The question of how to predict turnover of the principal remains an unknown. The purpose of this research was to search for possible relationships between certain contextual variables and principal turnover and to test the independent…

  15. Principal Turnover. Information Capsule. Volume 0914

    Blazer, Christie

    2010-01-01

    Recent studies indicate that school districts are facing increasing rates of principal turnover. Frequent principal changes deprive schools of the leadership stability they need to succeed, disrupt long-term school reform efforts, and may even be linked to increased teacher turnover and lower levels of student achievement. This Information Capsule…

  16. Do Principals Fire the Worst Teachers?

    Jacob, Brian A.

    2011-01-01

    This article takes advantage of a unique policy change to examine how principals make decisions regarding teacher dismissal. In 2004, the Chicago Public Schools (CPS) and Chicago Teachers Union signed a new collective bargaining agreement that gave principals the flexibility to dismiss probationary teachers for any reason and without the…

  17. Principals' Perceptions of School Public Relations

    Morris, Robert C.; Chan, Tak Cheung; Patterson, Judith

    2009-01-01

    This study was designed to investigate school principals' perceptions on school public relations in five areas: community demographics, parental involvement, internal and external communications, school council issues, and community resources. Findings indicated that principals' concerns were as follows: rapid population growth, change of…

  18. How Not to Prepare School Principals

    Davis, Stephen H.; Leon, Ronald J.

    2011-01-01

    Instead of focusing on how principals should be trained, an contrarian view is offered, grounded upon theoretical perspectives of experiential learning, and in particular, upon the theory of andragogy. A brief parable of the DoNoHarm School of Medicine is used as a descriptive analog for many principal preparation programs in America. The…

  19. Social Media Strategies for School Principals

    Cox, Dan; McLeod, Scott

    2014-01-01

    The purpose of this qualitative study was to describe, analyze, and interpret the experiences of school principals who use multiple social media tools with stakeholders as part of their comprehensive communications practices. Additionally, it examined why school principals have chosen to communicate with their stakeholders through social media.…

  20. Investigating Roles of Online School Principals

    Quilici, Sarah B.; Joki, Russell

    2012-01-01

    This study explores the instructional leadership skills required from online principals, as defined by one state's (Idaho) adaptation of the Interstate School Leaders Licensure Consortium (ISLLC) standards (1996) as a requirement for professional certification. Specifically, this qualitative study examined six sets of paired online principals and…

  1. The Right Principal for the Right School.

    American Association of School Administrators, Washington, DC.

    The selection of a principal requires (1) a clear understanding of the responsibilities of the superintendent and others concerned in the selection process, (2) an objective and adequate view of the contemporary principal's role and the kind of person qualified to fill that role, (3) specific selection criteria, and (4) a careful development of…

  2. Principals: Human Capital Managers at Every School

    Kimball, Steven M.

    2011-01-01

    Being a principal is more than just being an instructional leader. Principals also must manage their schools' teaching talent in a strategic way so that it is linked to school instructional improvement strategies, to the competencies needed to enact the strategies, and to success in boosting student learning. Teacher acquisition and performance…

  3. Teachers Need Principals' Guidance in Career Development.

    DeLong, Thomas J.

    1989-01-01

    Principals are responsible for initiating career development with teachers at all age and experience levels. Although most teachers want to remain in the classroom, many desire new and expanded roles. Principals can assist new teachers' socialization process and help mature faculty avoid the "plateau" trap. Includes 14 references. (MLH)

  4. Should Principals Know More about Law?

    Doctor, Tyrus L.

    2013-01-01

    Educational law is a critical piece of the education conundrum. Principals reference law books on a daily basis in order to address the wide range of complex problems in the school system. A principal's knowledge of law issues and legal decision-making are essential to provide effective feedback for a successful school.

  5. Metric-adjusted skew information

    Liang, Cai; Hansen, Frank

    2010-01-01

    We give a truly elementary proof of the convexity of metric-adjusted skew information following an idea of Effros. We extend earlier results of weak forms of superadditivity to general metric-adjusted skew information. Recently, Luo and Zhang introduced the notion of semi-quantum states on a...... bipartite system and proved superadditivity of the Wigner-Yanase-Dyson skew informations for such states. We extend this result to the general metric-adjusted skew information. We finally show that a recently introduced extension to parameter values 1 < p = 2 of the WYD-information is a special case of...... (unbounded) metric-adjusted skew information....

  6. Adjustment computations spatial data analysis

    Ghilani, Charles D

    2011-01-01

    the complete guide to adjusting for measurement error-expanded and updated no measurement is ever exact. Adjustment Computations updates a classic, definitive text on surveying with the latest methodologies and tools for analyzing and adjusting errors with a focus on least squares adjustments, the most rigorous methodology available and the one on which accuracy standards for surveys are based. This extensively updated Fifth Edition shares new information on advances in modern software and GNSS-acquired data. Expanded sections offer a greater amount of computable problems and their worked solu

  7. Maximum entropy principal for transportation

    In this work we deal with modeling of the transportation phenomenon for use in the transportation planning process and policy-impact studies. The model developed is based on the dependence concept, i.e., the notion that the probability of a trip starting at origin i is dependent on the probability of a trip ending at destination j given that the factors (such as travel time, cost, etc.) which affect travel between origin i and destination j assume some specific values. The derivation of the solution of the model employs the maximum entropy principle combining a priori multinomial distribution with a trip utility concept. This model is utilized to forecast trip distributions under a variety of policy changes and scenarios. The dependence coefficients are obtained from a regression equation where the functional form is derived based on conditional probability and perception of factors from experimental psychology. The dependence coefficients encode all the information that was previously encoded in the form of constraints. In addition, the dependence coefficients encode information that cannot be expressed in the form of constraints for practical reasons, namely, computational tractability. The equivalence between the standard formulation (i.e., objective function with constraints) and the dependence formulation (i.e., without constraints) is demonstrated. The parameters of the dependence-based trip-distribution model are estimated, and the model is also validated using commercial air travel data in the U.S. In addition, policy impact analyses (such as allowance of supersonic flights inside the U.S. and user surcharge at noise-impacted airports) on air travel are performed.

  8. Principal modes in multimode fibers: exploring the crossover from weak to strong mode coupling

    Xiong, Wen; Bromberg, Yaron; Redding, Brandon; Rotter, Stefan; Cao, Hui

    2016-01-01

    We present experimental and numerical studies on principal modes in a multimode fiber with mode coupling. By applying external stress to the fiber and gradually adjusting the stress, we have realized a transition from weak to strong mode coupling, which corresponds to the transition from single scattering to multiple scattering in mode space. Our experiments show that principal modes have distinct spatial and spectral characteristic in the weak and strong mode coupling regimes. We also investigate the bandwidth of the principal modes, in particular, the dependence of the bandwidth on the delay time, and the effects of the mode-dependent loss. By analyzing the path-length distributions, we discover two distinct mechanisms that are responsible for the bandwidth of principal modes in weak and strong mode coupling regimes. Taking into account the mode-dependent loss in the fiber, our numerical results are in good agreement with our experimental observations. Our study paves the way for exploring potential applica...

  9. What Is a "Good" Principal? Perspectives of Aspiring Principals in Singapore

    Ng, Pak Tee

    2016-01-01

    This paper presents the findings of an exploratory research project that examines what aspiring principals in Singapore think a good principal is, based on a framework of personal, interpersonal, and organizational dimensions of school leadership. According to the findings, a good principal has a moral purpose centered on personal values, a humble…

  10. The Principal's Perspective: School Safety, Bullying and Harassment. A Survey of Public School Principals

    Gay, Lesbian and Straight Education Network (GLSEN), 2008

    2008-01-01

    Bullying and harassment negatively affect the learning environment, and school principals can make a difference. Previous research has found that teachers see having a supportive principal as critical to changing school climate. Yet not all principals may have the experience, skills or knowledge to address lesbian, gay, bisexual or transgender…

  11. How Does District Principal Evaluation Affect Learning-Centered Principal Leadership? Evidence from Michigan School Districts

    Sun, Min; Youngs, Peter

    2009-01-01

    This study used Hierarchical Multivariate Linear models to investigate relationships between principals' behaviors and district principal evaluation purpose, focus, and assessed leadership activities in 13 school districts in Michigan. The study found that principals were more likely to engage in learning-centered leadership behaviors when the…

  12. Principal Time Management Skills: Explaining Patterns in Principals' Time Use, Job Stress, and Perceived Effectiveness

    Grissom, Jason A.; Loeb, Susanna; Mitani, Hajime

    2015-01-01

    Purpose: Time demands faced by school principals make principals' work increasingly difficult. Research outside education suggests that effective time management skills may help principals meet job demands, reduce job stress, and improve their performance. The purpose of this paper is to investigate these hypotheses. Design/methodology/approach:…

  13. Stress and Coping: A Comparison of Self-Report Measures of Functioning in Families of Young Children with Cerebral Palsy or No Medical Diagnosis

    Britner, Preston A.; Morog, Maria C.; Pianta, Robert C.; Marvin, Robert S.

    2003-01-01

    We analyzed data from 87 mothers of children ages 15 to 44 months with cerebral palsy (CP) or no diagnosis, who completed the Dyadic Adjustment Scale, Parenting Stress Index, Support Functions Scale, and Inventory of Social Support. Principal components analysis of the 15 subscales from the 5 measures revealed few cross-measure loadings. Mothers…

  14. Mood Adjustment via Mass Communication.

    Knobloch, Silvia

    2003-01-01

    Proposes and experimentally tests mood adjustment approach, complementing mood management theory. Discusses how results regarding self-exposure across time show that patterns of popular music listening among a group of undergraduate students differ with initial mood and anticipation, lending support to mood adjustment hypotheses. Describes how…

  15. Bayes linear covariance matrix adjustment

    Wilkinson, Darren J

    1995-01-01

    In this thesis, a Bayes linear methodology for the adjustment of covariance matrices is presented and discussed. A geometric framework for quantifying uncertainties about covariance matrices is set up, and an inner-product for spaces of random matrices is motivated and constructed. The inner-product on this space captures aspects of our beliefs about the relationship between covariance matrices of interest to us, providing a structure rich enough for us to adjust beliefs about unknown matrices in the light of data such as sample covariance matrices, exploiting second-order exchangeability and related specifications to obtain representations allowing analysis. Adjustment is associated with orthogonal projection, and illustrated with examples of adjustments for some common problems. The problem of adjusting the covariance matrices underlying exchangeable random vectors is tackled and discussed. Learning about the covariance matrices associated with multivariate time series dynamic linear models is shown to be a...

  16. Control of Adjustable Compliant Actuators

    Berno J.E. Misgeld

    2014-05-01

    Full Text Available Adjustable compliance or variable stiffness actuators comprise an additional element to elastically decouple the actuator from the load and are increasingly applied to human-centered robotic systems. The advantages of such actuators are of paramount importance in rehabilitation robotics, where requirements demand safe interaction between the therapy system and the patient. Compliant actuator systems enable the minimization of large contact forces arising, for example, from muscular spasticity and have the ability to periodically store and release energy in cyclic movements. In order to overcome the loss of bandwidth introduced by the elastic element and to guarantee a higher range in force/torque generation, new actuator designs consider variable or nonlinear stiffness elements, respectively. These components cannot only be adapted to the walking speed or the patient condition, but also entail additional challenges for feedback control. This paper introduces a novel design method for an impedance-based controller that fulfills the control objectives and compares the performance and robustness to a classical cascaded control approach. The new procedure is developed using a non-standard positive-real Η2 controller design and is applied to a loop-shaping approach. Robust norm optimal controllers are designed with regard to the passivity of the actuator load-impedance transfer function and the servo control problem. Classical cascaded and positive-real Η2 controller designs are validated and compared in simulations and in a test bench using a passive elastic element of varying stiffness.

  17. Changing Roles of Contemporary School Principals

    Aydın BALYER

    2012-08-01

    Full Text Available As a result of economic, technologic, social developments and globalization that affect the world, roles of schools and school principals have changed subsequently. Studies reveal that principals’ roles have diferntiated and their workload has increased accordingly. Studies also suggest that cotemporary school principals should carry out different roles such as supervising teachers and students, making decisions, organizing budgetary and financial issues, managing program and establishing school-community relations, instructional leadership and teachers’ professional development besides their current roles. Therefore, this theroetical study has been conducted in order to create awareness of the changing roles that school principals are expected to perfrom as well as the ones have already implemented.

  18. Principal curvatures of fibers and Heegaard surfaces

    Breslin, William

    2010-01-01

    We study principal curvatures of fibers and Heegaard surfaces smoothly embedded in hyperbolic 3-manifolds. It is well known that a fiber or a Heegaard surface in a hyperbolic 3-manifold cannot have principal curvatures everywhere less than one in absolute value. We show that given an upper bound on the genus of a minimally embedded fiber or Heegaard surface and a lower bound on the injectivity radius of the hyperbolic 3-manifold, there exists a $\\delta > 0$ such that the fiber or Heegaard surface must contain a point at which one of the principal curvatures is greater than $1 + \\delta$ in absolute value.

  19. The Labor Market and Economic Adjustment

    Pierre-Richard Agénor

    1996-01-01

    This paper examines the role of the labor market in the transmission process of adjustment policies in developing countries. It begins by reviewing the recent evidence regarding the functioning of these markets. It then studies the implications of wage inertia, nominal contracts, labor market segmentation, and impediments to labor mobility for stabilization policies. The effect of labor market reforms on economic flexibility and the channels through which labor market imperfections alter the ...

  20. Principal Hawaiian Islands Geoid Heights (GEOID96)

    National Oceanic and Atmospheric Administration, Department of Commerce — This 2' geoid height grid for the Principal Hawaiian Islands is distributed as a GEOID96 model. The computation used 61,000 terrestrial and marine gravity data held...

  1. Noncommutative principal bundles through twist deformation

    Aschieri, Paolo; Pagani, Chiara; Schenkel, Alexander

    2016-01-01

    We construct noncommutative principal bundles deforming principal bundles with a Drinfeld twist (2-cocycle). If the twist is associated with the structure group then we have a deformation of the fibers. If the twist is associated with the automorphism group of the principal bundle, then we obtain noncommutative deformations of the base space as well. Combining the two twist deformations we obtain noncommutative principal bundles with both noncommutative fibers and base space. More in general, the natural isomorphisms proving the equivalence of a closed monoidal category of modules and its twist related one are used to obtain new Hopf-Galois extensions as twists of Hopf-Galois extensions. A sheaf approach is also considered, and examples presented.

  2. Projected principal component analysis in factor models

    Fan, Jianqing; Liao, Yuan; Wang, Weichen

    2014-01-01

    This paper introduces a Projected Principal Component Analysis (Projected-PCA), which employees principal component analysis to the projected (smoothed) data matrix onto a given linear space spanned by covariates. When it applies to high-dimensional factor analysis, the projection removes noise components. We show that the unobserved latent factors can be more accurately estimated than the conventional PCA if the projection is genuine, or more precisely, when the factor loading matrices are r...

  3. Changing Roles of Contemporary School Principals

    Aydın BALYER

    2012-01-01

    As a result of economic, technologic, social developments and globalization that affect the world, roles of schools and school principals have changed subsequently. Studies reveal that principals’ roles have diferntiated and their workload has increased accordingly. Studies also suggest that cotemporary school principals should carry out different roles such as supervising teachers and students, making decisions, organizing budgetary and financial issues, managing program and establishing sch...

  4. Promoting principals' managerial involvement in instructional improvement

    Gillat, Alex; Sulzer-Azaroff, Beth

    1994-01-01

    Studies of school leadership suggest that visiting classrooms, emphasizing achievement and training, and supporting teachers are important indicators of the effectiveness of school principals. The utility of a behavior-analytic program to support the enhancement of these behaviors in 2 school principals and the impact of their involvement upon teachers' and students' performances in three classes were examined in two experiments, one at an elementary school and another at a secondary school. ...

  5. Principal alarms in multivariate statistical process control

    González, Isabel; Sánchez, Ismael

    2006-01-01

    This paper describes a methodology for the simulation of multivariate out of control situations using in-control data. The method is based on finding the independent factors of the variability of the process, and shifting these factors one by one. These shifts are then translated in terms of the observed variables. The shifts provoked by the most important factors are called principal alarms. The principal alarms are plotted, visualizing the main deviations of the process. Also, a resampling ...

  6. Do Principals Fire the Worst Teachers?

    Jacob, Brian A.

    2010-01-01

    This paper takes advantage of a unique policy change to examine how principals make decisions regarding teacher dismissal. In 2004, the Chicago Public Schools (CPS) and Chicago Teachers Union (CTU) signed a new collective bargaining agreement that gave principals the flexibility to dismiss probationary teachers for any reason and without the documentation and hearing process that is typically required for such dismissals. With the cooperation of the CPS, I matched information on all teachers ...

  7. A Geometric Approach to Noncommutative Principal Bundles

    Wagner, Stefan

    2011-01-01

    From a geometrical point of view it is, so far, not sufficiently well understood what should be a "noncommutative principal bundle". Still, there is a well-developed abstract algebraic approach using the theory of Hopf algebras. An important handicap of this approach is the ignorance of topological and geometrical aspects. The aim of this thesis is to develop a geometrically oriented approach to the noncommutative geometry of principal bundles based on dynamical systems and the representation theory of the corresponding transformation group.

  8. Melchizedek Stefanescu and Uniting of the Principalities

    Marius-Ioan Chindris

    2012-01-01

    The Union of the Principalities was a key event in Romanian history and played asignificant role in the formation of the Romanian state. Melchisedec Stefanescu (1823-1892), leadingfigure of the age, participated actively inthe front seeking the Unification of the RomanianPrincipalities and was one of the leading militants of the union, along with his contemporaries. Hismultilateral personality (scholar, priest and writer) was completed by that of a patriot. The conclusionof my article is that...

  9. Cultural Leadership Roles of School Principals

    Sinan YÖRÜK; Bahar ŞAHİN

    2012-01-01

    The purpose of this study is to examine cultural leadership roles of school principals in high schools as effective schools. In this study, the effects of of variables, such as gender, professional status, and experience were examined. 240 high school teachers and 48 high school principals working in Afyonkarahisar in the 2010-2011 academic year participated in this study. A survey consisting of 33 items was developed in order to gather the data. The data were analyzed via statistics package ...

  10. Principal Leadership Style and Teacher Commitment among a Sample of Secondary School Teachers in Barbados

    Ian Alwyn Marshall

    2015-05-01

    Full Text Available In Barbados, the issue of principal leadership and teacher productivity has occupied the attention of teacher unions and educational authorities alike.  The teachers have been calling for principals to be removed while the principals have been arguing for greater autonomy to discipline teachers. This state of affairs has, understandably, adversely impacted teacher commitment levels.  In the literature there is a clear correlation between principal leadership style and teacher commitment, however, it is important to know whether or not the relationship holds true in the context of Barbadian schools. This author is of the view that if teacher commitment levels are to return to those in evidence in effective schools, then attention must be given to the way in which principals exercise their leadership functions. This study was therefore designed to examine in greater detail the relationship between principal leadership style and teacher commitment.  The author employed purposive sampling to survey a cohort of ninety (90 teachers and eleven (11 principals drawn from eleven secondary schools. Results confirmed the relationship between principal leadership style and teacher commitment, and a statistically significant difference in the level of commitment reported by teachers at newer secondary schools and teachers at older secondary schools. Results also indicated that biographical variables moderated the relationship between principal leadership style and teacher commitment. Additionally, the regression model indicated that the principal leadership style sub-variables, in combination, accounted for some variance in the commitment demonstrated by teachers.

  11. Nutrition education for adolescents: principals' views.

    Lai-Yeung, Wai-Ling Theresa

    2011-01-01

    This study aimed to examine school principals' perceptions of the school environment in Hong Kong as a context for the dissemination of food knowledge and inculcation of healthy eating habits. A questionnaire survey was administered in secondary schools in Hong Kong to survey Principals' views of students' food choices, operation of the school tuck shop, and promotion of healthy eating at school. Questionnaires were disseminated to all the secondary schools offering Home Economics (300 out of 466), and 188 schools responded, making up a response rate of 63%. Collected data were analyzed using SPSS. Most of the schools (82%) claimed to have a food policy to monitor the operation of the school canteen, and about half (52%) asserted there were insufficient resources to promote healthy eating at school. Principals (88%) generally considered it not acceptable for the school tuck shop to sell junk food; however, 45% thought that banning junk food at school would not help students develop good eating habits. Only 4% of the principals believed nutrition education influenced eating habits; whereas the majority (94%) felt that even with acquisition of food knowledge, students may not be able to put theory into practice. Cooking skills were considered important but principals (92%) considered transmission of cooking skills the responsibility of the students' families. Most of the principals (94%) believed that school-family collaboration is important in promoting healthy eating. Further efforts should be made to enhance the effectiveness of school food policies and to construct healthy school environments in secondary schools. PMID:21393115

  12. Adjustable Induction-Heating Coil

    Ellis, Rod; Bartolotta, Paul

    1990-01-01

    Improved design for induction-heating work coil facilitates optimization of heating in different metal specimens. Three segments adjusted independently to obtain desired distribution of temperature. Reduces time needed to achieve required temperature profiles.

  13. Adjustment to Spinal Cord Injury

    ... may need to work to help with family finances. All of the changes that they face can ... 2000). Goal instability and adjustment to physical disability. Journal of Counseling Psychology, 47(2). 251-265. This ...

  14. Adjustment techniques for experimental data

    To carry through numerically the different adjustment of experimental data planned by National Institute of Nuclear Research investigators. It is presented the different adjustment techniques of experimental data which are fundamentally for: linear least squares, non linear with restrictions. Methodology: Lineal least squares - Orthogonal decomposition via Householder reflections. No lineal - Method of general lowering and quasi Newton; Levenberg-Marquardt modified - More version. No lineal with restrictions - Quadratic sequential programming method (In process). (Author)

  15. Data structure characterization of miltispectral data using principal component and principal factor analysis

    Lee, Jae K.; Mausel, Paul W.; Lulla, Kamlesh P.

    1989-01-01

    Both principal component analysis (PCA) and principal factor analysis (PFA) were used to analyze an experimental multispectral data structure in terms of common and unique variance. Only the common variance of the multispectral data was associated with the principal factor, while higher-order principal components were associated with both common and unique variance. The unique variance was found to represent small spectral variations within each cover type as well as noise vectors, and was most abundant in the lower-order principal components. The lower-order principal components can be useful in research designed to discriminate minor physical variations within features, and to highlight localized change when using multitemporal-multispectral data. Conversely, PFA of the multispectral data provided an insight into a great potential for discriminating basic land-cover types by excluding the unique variance which was related to the noise and minor spectral variations.

  16. Development and Validation of a Principal Implementation Practices Measure: The Principal Implementation Questionnaire

    Nettles, Stephen M.; Petscher, Yaacov

    2007-01-01

    Measurement of principal implementation behaviors has proved difficult to researchers in educational leadership due to a lack of consensus on the operational definitions of leadership constructs. The Principal Implementation Questionnaire (PIQ) was developed and validated with the intention of providing clarity in the assessment of principal leadership behaviors in the implementation of effective reading programs. Constructs were operationally defined within the context of the population of i...

  17. Promoting principals' managerial involvement in instructional improvement.

    Gillat, A

    1994-01-01

    Studies of school leadership suggest that visiting classrooms, emphasizing achievement and training, and supporting teachers are important indicators of the effectiveness of school principals. The utility of a behavior-analytic program to support the enhancement of these behaviors in 2 school principals and the impact of their involvement upon teachers' and students' performances in three classes were examined in two experiments, one at an elementary school and another at a secondary school. Treatment conditions consisted of helping the principal or teacher to schedule his or her time and to use goal setting, feedback, and praise. A withdrawal design (Experiment 1) and a multiple baseline across classrooms (Experiment 2) showed that the principal's and teacher's rates of praise, feedback, and goal setting increased during the intervention, and were associated with improvements in the academic performance of the students. In the future, school psychologists might analyze the impact of involving themselves in supporting the principal's involvement in improving students' and teachers' performances or in playing a similar leadership role themselves. PMID:16795819

  18. [Psychological adjustment following lower limb amputation].

    Panyi, Lilla Krisztina; Lábadi, Beatrix

    2015-09-27

    Rehabilitation of lower limb amputees and the fitting of their prosthesis depend highly on the psychological adjustment process and motivational state of the patient. The loss of a limb is extremely challenging and can cause various physical and psychological problems. Depression, anxiety, decreased well-being and quality of life, body image dissatisfaction and changes in self-concept and identity are frequent after lower limb amputation. In the interest of adjustment patients have to cope with the emerging changes and difficulties in their lifes as well as the problems in psychological functioning. It is important for them to accept the alterations in their body and identity, and integrate them in a new self-concept in which process motivation is a fundamental issue. The aim of this article is to review the literature on psychological consequences of lower limb amputation, and to propose an integrative way of rehabilitation for lower limb amputees. PMID:26550913

  19. Family Correlates of Adjustment Profiles in Mexican-Origin Female Adolescents

    Bámaca-Colbert, Mayra Y.; Gayles, Jochebed G.; Lara, Rebecca

    2011-01-01

    This study used a person-centered approach to examine patterns of adjustment along psychological (i.e., depression, self-esteem, anxiety) and academic (i.e., academic motivation) domains in a sample (N = 338) of Mexican-origin female adolescents. Four adjustment profiles were identified. A High Functioning (n = 173) group, which exhibited high positive adjustment and academic functioning, an Average Functioning (n = 83) group, who exhibited average psychological and academic functioning, an A...

  20. Riccati transformations and principal solutions of discrete linear systems

    Consider a second-order linear matrix difference equation. A definition of principal and anti-principal, or recessive and dominant, solutions of the equation are given and the existence of principal and anti-principal solutions and the essential uniqueness of principal solutions is proven

  1. 7 CFR 251.7 - Formula adjustments.

    2010-01-01

    ... 7 Agriculture 4 2010-01-01 2010-01-01 false Formula adjustments. 251.7 Section 251.7 Agriculture... GENERAL REGULATIONS AND POLICIES-FOOD DISTRIBUTION THE EMERGENCY FOOD ASSISTANCE PROGRAM § 251.7 Formula adjustments. Formula adjustments. (a) Commodity adjustments. The Department will make annual adjustments...

  2. Principals, Trust, and Cultivating Vibrant Schools

    Megan Tschannen-Moran

    2015-03-01

    Full Text Available Although principals are ultimately held accountable to student learning in their buildings, the most consistent research results have suggested that their impact on student achievement is largely indirect. Leithwood, Patten, and Jantzi proposed four paths through which this indirect influence would flow, and the purpose of this special issue is to examine in greater depth these mediating variables. Among mediating variables, we assert that trust is key. In this paper, we explore the evidence that points to the role that faculty trust in the principal plays in student learning and how principals can cultivate trust by attending to the five facets of trust, as well as the correlates of trust that mediate student learning, including academic press, collective teacher efficacy, and teacher professionalism. We argue that trust plays a role in each of the four paths identified by Leithwood, Patten, and Jantzi. Finally, we explore possible new directions for future research.

  3. Principal component regression for crop yield estimation

    Suryanarayana, T M V

    2016-01-01

    This book highlights the estimation of crop yield in Central Gujarat, especially with regard to the development of Multiple Regression Models and Principal Component Regression (PCR) models using climatological parameters as independent variables and crop yield as a dependent variable. It subsequently compares the multiple linear regression (MLR) and PCR results, and discusses the significance of PCR for crop yield estimation. In this context, the book also covers Principal Component Analysis (PCA), a statistical procedure used to reduce a number of correlated variables into a smaller number of uncorrelated variables called principal components (PC). This book will be helpful to the students and researchers, starting their works on climate and agriculture, mainly focussing on estimation models. The flow of chapters takes the readers in a smooth path, in understanding climate and weather and impact of climate change, and gradually proceeds towards downscaling techniques and then finally towards development of ...

  4. Ab-initio melting curve and principal Hugoniot of tantalum

    We report first principles calculations of the melting curve and principal Hugoniot (P - V curve) of body centered cubic (bcc) tantalum in the pressure range 0-300 GPa. A description of lattice dynamics and thermal properties of bcc Ta using finite temperature density functional theory (DFT) is presented. The approach works within the projector augmented wave (PAW) implementation of DFT and explicitly treats in valence the 5p, 6s and 5d electrons. The principal Hugoniot (P - V curve), obtained using the Rankine-Hugoniot equation, is investigated using the generalized gradient approximations (GGA). Very good agreement with the shock experiments is obtained with GGA in all the range of pressure. We also report the temperature-pressure relation on the shock Hugoniot and the full ab-initio melting curve of Ta

  5. Deformation Quantization of Principal Fibre Bundles and Classical Gauge Theories

    Wei\\ss, Stefan

    2010-01-01

    In this dissertation the notion of deformation quantization of principal fibre bundles is established and investigated in order to find a geometric formulation of classical gauge theories on noncommutative space-times. As a generalization, the notion of deformation quantization of surjective submersions is also discussed. It is shown that deformation quantizations of surjective submersions and principal fibre bundles always exist and are unique up to equivalence. These statements concerning complex-valued functions are moreover formulated and proved for sections of arbitrary vector bundles over the total space, in particular equivariant vector bundles. The commutants of the deformed right module structures within the differential operators, playing an inportant role with regard to the infinitesimal gauge transformations, are computed explicitly in each case. Depending on the choice of specific covariant derivatives and connections the commutants are isomorphic to the formal power series of the respective vert...

  6. The Principals and Practice of Distributed High Throughput Computing

    CERN. Geneva

    2016-01-01

    The potential of Distributed Processing Systems to deliver computing capabilities with qualities ranging from high availability and reliability to easy expansion in functionality and capacity were recognized and formalized in the 1970’s. For more three decade these principals Distributed Computing guided the development of the HTCondor resource and job management system. The widely adopted suite of software tools offered by HTCondor are based on novel distributed computing technologies and are driven by the evolving needs of High Throughput scientific applications. We will review the principals that underpin our work, the distributed computing frameworks and technologies we developed and the lessons we learned from delivering effective and dependable software tools in an ever changing landscape computing technologies and needs that range today from a desktop computer to tens of thousands of cores offered by commercial clouds. About the speaker Miron Livny received a B.Sc. degree in Physics and Mat...

  7. Geometry of quantum principal bundles, 1

    Durdevic, M

    1995-01-01

    A theory of principal bundles possessing quantum structure groups and classical base manifolds is presented. Structural analysis of such quantum principal bundles is performed. A differential calculus is constructed, combining differential forms on the base manifold with an appropriate differential calculus on the structure quantum group. Relations between the calculus on the group and the calculus on the bundle are investigated. A concept of (pseudo)tensoriality is formulated. The formalism of connections is developed. In particular, operators of horizontal projection, covariant derivative and curvature are constructed and analyzed. Generalizations of the first structure equation and of the Bianchi identity are found. Illustrative examples are presented.

  8. Outlier Mining Based on Principal Component Estimation

    Hu Yang; Ting Yang

    2005-01-01

    Outlier mining is an important aspect in data mining and the outlier mining based on Cook distance is most commonly used. But we know that when the data have multicollinearity, the traditional Cook method is no longer effective. Considering the excellence of the principal component estimation, we use it to substitute the least squares estimation, and then give the Cook distance measurement based on principal component estimation, which can be used in outlier mining. At the same time, we have done some research on related theories and application problems.

  9. Multisource Principal Evaluation Data: Principals' Orientations and Reactions to Teacher Feedback Regarding Their Leadership Effectiveness

    Goldring, Ellen B.; Mavrogordato, Madeline; Haynes, Katherine Taylor

    2015-01-01

    Purpose: A relatively new approach to principal evaluation is the use of multisource feedback, which typically entails a leader's self-evaluation as well as parallel evaluations from subordinates, peers, and/or superiors. However, there is little research on how principals interact with evaluation data from multisource feedback systems. This…

  10. Salary Report Number 1. Principals and Assistant Principals. Administrative Information Report.

    National Association of Secondary School Principals, Reston, VA.

    Tables present a summary of the data obtained in a national survey of principals' and assistant principals' salaries. Section 1 of the report compares 1975-76 minimum and maximum salary schedule summaries by district enrollment size, section 2 makes the comparison by using a per pupil expenditure factor, and section 3 contains a maximum scheduled…

  11. Mentor Principals' Perceptions about a Mentoring Program for Aspiring Principals

    Barnett, Steven Nicholas

    2013-01-01

    The purpose of this study was to assess the perceptions of principals who serve as mentors for an internship program for aspiring principals at East Tennessee State University. Each mentor was interviewed to gather information about the internship program, the benefits of mentoring in the program, and what the mentors may have learned about their…

  12. Leading Schools through a Generational Lens: Perceptions of Principals' Change Leadership Disaggregated by Principal Generation

    Kuhn, Matthew Scott

    2012-01-01

    The purpose of this descriptive quantitative study was to investigate possible differences in school leadership within a change process, as perceived by teachers. Grouped by generation, this study investigated principals' perceptions of change order and that of their teachers, as well as how their teachers perceived their principal's leadership…

  13. Principal Sensemaking of Inclusion: A Multi-Case Study of Five Urban School Principals

    DeMatthews, David Edward

    2012-01-01

    This study examined how five principals working in one urban school district made sense of inclusion. I employed a multi-case study guided by the theoretical framework of sensemaking. Weick's sensemaking theory was useful in examining the way principals made sense of inclusion. Each of the seven characteristics of Weick's sensemaking…

  14. Development and Validation of a Principal Implementation Practices Measure: The Principal Implementation Questionnaire

    Nettles, Stephen M.; Petscher, Yaacov

    2007-01-01

    Measurement of principal implementation behaviors has proved difficult to researchers in educational leadership due to a lack of consensus on the operational definitions of leadership constructs. The Principal Implementation Questionnaire (PIQ) was developed and validated with the intention of providing clarity in the assessment of principal…

  15. Principal Bundles on the Projective Line

    V B Mehta; S Subramanian

    2002-08-01

    We classify principal -bundles on the projective line over an arbitrary field of characteristic ≠ 2 or 3, where is a reductive group. If such a bundle is trivial at a -rational point, then the structure group can be reduced to a maximal torus.

  16. Managerial Leadership and the Effective Principal.

    Yukl, Gary

    To help relate management ideas and knowledge to educational administration, the author reviews the major theories and findings from the last 20 years on managerial leadership and discusses their relevance for school principals. He first summarizes findings from three approaches: the traits approach, emphasizing managerial motivation and skills;…

  17. A Principal's Guide to Children's Allergies.

    Munoz-Furlong, Anne

    1999-01-01

    Discusses several common children's allergies, including allergic rhinitis, asthma, atopic dermatitis, food allergies, and anaphylactic shock. Principals should become familiar with various medications and should work with children's parents and physicians to determine how to manage their allergies at school. Allergen avoidance is the best…

  18. THE ROLE BEHAVIOR OF SCHOOL PRINCIPALS.

    GROSS, NEAL; AND OTHERS

    THE EFFECTS AND DETERMINANTS OF THREE ROLE BEHAVIOR ASPECTS OF SCHOOL PRINCIPALS WERE STUDIED, AS FOLLOWS--(1) CLOSENESS OF TEACHER SUPERVISION, (2) SUPPORT OF INNOVATION, AND (3) INVOLVEMENT OF PARENTS IN SCHOOL AFFAIRS. SPECIFICALLY, THE EFFECTS AND DETERMINANTS TO BE EXAMINED WERE THE ORGANIZATIONAL EFFECTS OF ROLE BEHAVIOR IN TERMS OF TEACHER…

  19. Transformational Leadership Behaviors in Elementary School Principals

    Ergle, Barbara

    2012-01-01

    School leaders face high expectations from society for leadership effectiveness. While it is commonly accepted that leadership practices contribute to school excellence, specific behaviors of effective elementary principals in the local context were not well understood. The purpose of this mixed methods study was to investigate self-reported…

  20. Characteristics of Principal Leadership Influencing School Culture

    Hudson, Norma J.

    2012-01-01

    The primary purpose of this study is to examine characteristics of principal leadership influencing school culture as viewed by stakeholders involved in the International Schools Group (ISG) in Saudi Arabia. A secondary purpose of this study is to inform ISG educational leaders about the perspectives of their respective stakeholder groups…

  1. Contextualizing the Position of Assistant Principal.

    Mertz, Norma T.

    This paper reports on a study that described how assistant principals operate within the context in which they serve, and how they and their professional situations interact. Its focus was less on their duties and more on the how: how they think about what they do and their position, how they perceive their place within the organization, and how…

  2. Job Satisfaction among Minnesota High School Principals

    Heyd, Steven DuWayne

    2010-01-01

    It has been reported the demands of the high school principalship in the United States has deterred qualified candidates from accepting the position. The purpose of this study was to investigate levels of job satisfaction among Minnesota high school principals within a potentially dwindling supply of qualified candidates as reported in other…

  3. Quantum principal bundles and corresponding gauge theories

    Durdevic, M

    1995-01-01

    A generalization of classical gauge theory is presented, in the framework of a noncommutative-geometric formalism of quantum principal bundles over smooth manifolds. Quantum counterparts of classical gauge bundles, and classical gauge transformations, are introduced and investigated. A natural differential calculus on quantum gauge bundles is constructed and analyzed. Kinematical and dynamical properties of corresponding gauge theories are discussed.

  4. The Leadership Teachers Want from Principals: Transformational

    Hauserman, Cal P.; Stick, Sheldon L.

    2013-01-01

    The data shared in this paper is part a preliminary study. A more detailed and robust analysis of data will be conducted later. From a randomly generated sample of 135 public schools in the Province of Alberta, Canada 77 agreed to participate in a study on leadership attributes of principals. Ten randomly selected teachers from each participating…

  5. Conceptualizing Social Justice: Interviews with Principals

    Wang, Fei

    2015-01-01

    Purpose: Today, as the understanding of diversity is further expanded, the meaning of social justice becomes even more complicated, if not confusing. The purpose of this paper is to explore how school principals with social justice commitment understand and perceive social justice in their leadership practices. Design/methodology/approach: A…

  6. Burnout And Lifestyle Of Principals And Entrepreneurs

    Jasna Lavrenčič

    2014-12-01

    Full Text Available Research Question (RQ: What kind of lifestyle do the principals and entrepreneurs lead? Does the lifestyle of principals and entrepreneurs influence burnout? Purpose: To find out, based on the results of a questionnaire, what kind of lifestyle both researched groups lead. Does lifestyle have an influence on the occurrence of the phenomenon of burnout. Method: We used the method of data collection by questionnaire. Acquired data were analyzed using SPSS, descriptive and inference statistics. Results: Results showed, that both groups lead a similar lifestyle and that lifestyle influences burnout with principals, as well as entrepreneurs. Organization: School principals and entrepreneurs are the heads of individual organizations or companies, the goal of which is success. To be successful in their work, they must adapt their lifestyle, which can be healthy or unhealthy. If their lifestyle is unhealthy, it can lead to burnout. Society: With results of the questionnaire we would like to answer the question about the lifestyle of both groups and its influence on the occurrence of burnout. Originality: The study of lifestyle and the occurrence of burnout in these two groups is the first study in this area. Limitations/Future Research: In continuation, research groups could be submitted to the research fields of effort physiology and tracking of certain haematological parameters, such as cholesterol, blood sugar and stress hormones - adrenaline, noradrenalin, cortisol. Thus, we could carry out an even more in depth research of the connection between lifestyle and burnout.

  7. Principal Symbol of Euler-Lagrange Operators

    Fatibene, Lorenzo

    2016-01-01

    We shall introduce the principal symbol for Euler-Lagrange operators and use them to charac- terise well-posed initial value problems. We shall clarify how constraints can arise in Lagrangian covariant theories by extending the standard treatment in GR. Finally, we sketch a quantization procedure based on what done in LQG.

  8. What Principals Should Know About Food Allergies.

    Munoz-Furlong, Anne

    2002-01-01

    Describes what principals should know about recent research findings on food allergies (peanuts, tree nuts, milk, eggs, soy, wheat) that can produce severe or life-threatening reactions in children. Asserts that every school should have trained staff and written procedures for reacting quickly to allergic reactions. (PKP)

  9. Principal normal indicatrices of closed space curves

    Røgen, Peter

    1999-01-01

    A theorem due to J. Weiner, which is also proven by B. Solomon, implies that a principal normal indicatrix of a closed space curve with nonvanishing curvature has integrated geodesic curvature zero and contains no subarc with integrated geodesic curvature pi. We prove that the inverse problem...

  10. Principal normal indicatrices of closed space curves

    Røgen, Peter

    1997-01-01

    A theorem due to J. Weiner, which also is proven by B. Solomon, implies that a principal normal indicatrix of a closed space curve with non-vanishing curvature has integrated geodesic curvature zero and contains no sub arc with integrated geodesic curvature Pi. We prove that the inverse problem...

  11. Principal component analysis implementation in Java

    Wójtowicz, Sebastian; Belka, Radosław; Sławiński, Tomasz; Parian, Mahnaz

    2015-09-01

    In this paper we show how PCA (Principal Component Analysis) method can be implemented using Java programming language. We consider using PCA algorithm especially in analysed data obtained from Raman spectroscopy measurements, but other applications of developed software should also be possible. Our goal is to create a general purpose PCA application, ready to run on every platform which is supported by Java.

  12. Chicago Initiative Aims to Upgrade Principal Pipeline

    Maxwell, Lesli A.

    2013-01-01

    Even with nearly 50 schools shutting down at the end of this month, Chicago education officials have been barreling ahead with plans to groom a large crop of high-performing principals that they say represents the most ambitious effort the city has undertaken to upgrade its school leadership ranks. The goal, said Chicago schools CEO Barbara…

  13. Professional Norms Guiding School Principals' Pedagogical Leadership

    Leo, Ulf

    2015-01-01

    Purpose: The purpose of this paper is to identify and analyze the professional norms surrounding school development, with a special emphasis on school principals' pedagogical leadership. Design/methodology/approach: A norm perspective is used to identify possible links between legal norms, professional norms, and actions. The findings are based on…

  14. Principal component analysis within nuclear structure

    Al-Sayed, A

    2015-01-01

    The principal component analysis (PCA) of different parameters affecting collectivity of nuclei predicted to be candidate of the interacting boson model dynamical symmetries are performed. The results show that, the use of PCA within nuclear structure can give us a simple way to identify collectivity together with the parameters simultaneously affecting it.

  15. Principal Connection / Amazon and the Whole Teacher

    Hoerr, Thomas R.

    2015-01-01

    A recent controversy over Amazon's culture has strong implications for the whole child approach, and it offers powerful lessons for principals. A significant difference between the culture of so many businesses today and the culture at good schools is that in good schools, the welfare of the employees is very important. Student success is the…

  16. The Assistant Principal: Leadership Choices and Challenges.

    Marshall, Catherine

    The position of assistant principal has been virtually ignored and sometimes maligned. Based on perspectives that arise from administrative theory, career development research, and school administration studies, this document describes the special nature of the assistantship, daily work, rewards, and frustrations. Five chapters include: (1) "What…

  17. Trusting Transformational Principals: An Empirical Surprise.

    Mannion, Patrick T.

    This study explored the relationship between transformational leadership and trust in schools. The central thesis is that high levels of trust should significantly correlate with transformational leadership behaviors by school principals. The study involved a sample of 451 teachers in 39 public secondary schools located in four suburban areas…

  18. Principals in Partnership with Math Coaches

    Grant, Catherine Miles; Davenport, Linda Ruiz

    2009-01-01

    One of the most promising developments in math education is the fact that many districts are hiring math coaches--also called math resource teachers, math facilitators, math lead teachers, or math specialists--to assist elementary-level teachers with math instruction. What must not be lost, however, is that principals play an essential role in…

  19. Probabilistic Principal Component Analysis for Metabolomic Data.

    Nyamundanda, Gift

    2010-11-23

    Abstract Background Data from metabolomic studies are typically complex and high-dimensional. Principal component analysis (PCA) is currently the most widely used statistical technique for analyzing metabolomic data. However, PCA is limited by the fact that it is not based on a statistical model. Results Here, probabilistic principal component analysis (PPCA) which addresses some of the limitations of PCA, is reviewed and extended. A novel extension of PPCA, called probabilistic principal component and covariates analysis (PPCCA), is introduced which provides a flexible approach to jointly model metabolomic data and additional covariate information. The use of a mixture of PPCA models for discovering the number of inherent groups in metabolomic data is demonstrated. The jackknife technique is employed to construct confidence intervals for estimated model parameters throughout. The optimal number of principal components is determined through the use of the Bayesian Information Criterion model selection tool, which is modified to address the high dimensionality of the data. Conclusions The methods presented are illustrated through an application to metabolomic data sets. Jointly modeling metabolomic data and covariates was successfully achieved and has the potential to provide deeper insight to the underlying data structure. Examination of confidence intervals for the model parameters, such as loadings, allows for principled and clear interpretation of the underlying data structure. A software package called MetabolAnalyze, freely available through the R statistical software, has been developed to facilitate implementation of the presented methods in the metabolomics field.

  20. Principal component analysis of psoriasis lesions images

    Maletti, Gabriela Mariel; Ersbøll, Bjarne Kjær

    2003-01-01

    A set of RGB images of psoriasis lesions is used. By visual examination of these images, there seem to be no common pattern that could be used to find and align the lesions within and between sessions. It is expected that the principal components of the original images could be useful during future...

  1. Tax Adjusted for Imported Equipment

    2010-01-01

    @@ Ministry of Finance, Central Administration of Customs, and State Administration of Taxation of P.R. of China jointly issued a "Notice on the Lists Related to the Interim Provisions on the Adjustment of Import Tax Policy on Major Technical Equipment" (the Notice) on April 13rd to adjust the list of equipment catalog and merchandise attached to the "Interim Provisions on the Import Tax Policy on Major Technical Equipment", as well as the preferential scope and extent of the import tax on a number of major technical equipment.

  2. 75 FR 33379 - Railroad Cost Recovery Procedures-Productivity Adjustment; Quarterly Rail Cost Adjustment Factor

    2010-06-11

    ... Surface Transportation Board Railroad Cost Recovery Procedures--Productivity Adjustment; Quarterly Rail... Railroads that the Board restate the previously published productivity adjustment for the 2003-2007 averaging period (2007 productivity adjustment) so that it tracks the 2007 productivity adjustment...

  3. Adjusted Rasch person-fit statistics.

    Dimitrov, Dimiter M; Smith, Richard M

    2006-01-01

    Two frequently used parametric statistics of person-fit with the dichotomous Rasch model (RM) are adjusted and compared to each other and to their original counterparts in terms of power to detect aberrant response patterns in short tests (10, 20, and 30 items). Specifically, the cube root transformation of the mean square for the unweighted person-fit statistic, t, and the standardized likelihood-based person-fit statistic Z3 were adjusted by estimating the probability for correct item response through the use of symmetric functions in the dichotomous Rasch model. The results for simulated unidimensional Rasch data indicate that t and Z3 are consistently, yet not greatly, outperformed by their adjusted counterparts, denoted t* and Z3*, respectively. The four parametric statistics, t, Z3, t*, and Z3*, were also compared to a non-parametric statistic, HT, identified in recent research as outperforming numerous parametric and non-parametric person-fit statistics. The results show that HT substantially outperforms t, Z3, t*, and Z3* in detecting aberrant response patterns for 20-item and 30-item tests, but not for very short tests of 10 items. The detection power of t, Z3, t*, and Z3*, and HT at two specific levels of Type I error, .10 and .05 (i.e., up to 10% and 5% false alarm rate, respectively), is also reported. PMID:16632900

  4. Precision Adjustable Liquid Regulator (ALR)

    Meinhold, R.; Parker, M.

    2004-10-01

    A passive mechanical regulator has been developed for the control of fuel or oxidizer flow to a 450N class bipropellant engine for use on commercial and interplanetary spacecraft. There are several potential benefits to the propulsion system, depending on mission requirements and spacecraft design. This system design enables more precise control of main engine mixture ratio and inlet pressure, and simplifies the pressurization system by transferring the function of main engine flow rate control from the pressurization/propellant tank assemblies, to a single component, the ALR. This design can also reduce the thermal control requirements on the propellant tanks, avoid costly Qualification testing of biprop engines for missions with more stringent requirements, and reduce the overall propulsion system mass and power usage. In order to realize these benefits, the ALR must meet stringent design requirements. The main advantage of this regulator over other units available in the market is that it can regulate about its nominal set point to within +/-0.85%, and change its regulation set point in flight +/-4% about that nominal point. The set point change is handled actively via a stepper motor driven actuator, which converts rotary into linear motion to affect the spring preload acting on the regulator. Once adjusted to a particular set point, the actuator remains in its final position unpowered, and the regulator passively maintains outlet pressure. The very precise outlet regulation pressure is possible due to new technology developed by Moog, Inc. which reduces typical regulator mechanical hysteresis to near zero. The ALR requirements specified an outlet pressure set point range from 225 to 255 psi, and equivalent water flow rates required were in the 0.17 lb/sec range. The regulation output pressure is maintained at +/-2 psi about the set point from a P (delta or differential pressure) of 20 to over 100 psid. Maximum upstream system pressure was specified at 320 psi

  5. Adult Attachment and Dyadic Adjustment: The Mediating Role of Shame.

    Martins, Teresa C; Canavarro, Maria Cristina; Moreira, Helena

    2016-07-01

    Although it is widely recognized that adult attachment is associated with romantic relationship quality, the mechanisms involved remain poorly understood. This study aimed to investigate the mediating role of external and internal shame on the association between attachment and dyadic adjustment. A battery of self-report measures was completed by 228 Portuguese participants and a serial multiple mediation model was tested. Data showed that, in the population under study, attachment dimensions were associated with worse dyadic adjustment through high external and internal shame. Internal shame alone also mediated the association between attachment avoidance and dyadic adjustment. This study identifies a new putative mechanism linking adult attachment and intimate relationship functioning that may be targeted in couples therapy to promote a better dyadic adjustment and relationship functioning. PMID:26759960

  6. On Self-adjustment of Social Conventions to Small Perturbations

    JIANG Yi-Chuan

    2008-01-01

    @@ We present a model for self-adjustment of social conventions to small perturbations, and investigate how pertur-bations can influence the convergence of social convention in different situations.The experimental results show that the sensitivity of social conventions is determined by not only the perturbations themselves but also the agent adjustment functions for the perturbations; and social conventions are more sensitive to the outlier agent number than to the strategy fluctuation magnitudes and localities of perturbations.

  7. An adjustable contracted CI method

    王育彬; 甘正汀; 苏克和; 文振翼

    1999-01-01

    A new contracted CI scheme——adjustable contracted CI scheme——is presented and programed. The efficiency of this scheme is tested by some example calculations. The result shows that the application of the new scheme is flexible and the correlation energy loss is lower than that of the original externally contracted CI method.

  8. Adjustment or updating of models

    D J Ewins

    2000-06-01

    In this paper, first a review of the terminology used in the model adjustment or updating is presented. This is followed by an outline of the major updating algorithms cuurently available, together with a discussion of the advantages and disadvantages of each, and the current state-of-the-art of this important application and part of optimum design technology.

  9. Hockey sticks, principal components, and spurious significance

    McIntyre, Stephen; McKitrick, Ross

    2005-02-01

    The ``hockey stick'' shaped temperature reconstruction of Mann et al. (1998, 1999) has been widely applied. However it has not been previously noted in print that, prior to their principal components (PCs) analysis on tree ring networks, they carried out an unusual data transformation which strongly affects the resulting PCs. Their method, when tested on persistent red noise, nearly always produces a hockey stick shaped first principal component (PC1) and overstates the first eigenvalue. In the controversial 15th century period, the MBH98 method effectively selects only one species (bristlecone pine) into the critical North American PC1, making it implausible to describe it as the ``dominant pattern of variance''. Through Monte Carlo analysis, we show that MBH98 benchmarks for significance of the Reduction of Error (RE) statistic are substantially under-stated and, using a range of cross-validation statistics, we show that the MBH98 15th century reconstruction lacks statistical significance.

  10. Principals' transformational leadership and teachers' collective efficacy.

    Dussault, Marc; Payette, Daniel; Leroux, Mathieu

    2008-04-01

    The study was designed to test the relationship of principals' transformational, transactional, and laissez-faire leadership with teachers' collective efficacy. Bandura's theory of efficacy applied to the group and Bass's transformational leadership theory were used as the theoretical framework. Participants included 487 French Canadian teachers from 40 public high schools. As expected, there were positive and significant correlations between principals' transformational and transactional leadership and teachers' collective efficacy. Also, there was a negative and significant correlation between laissez-faire leadership and teachers' collective efficacy. Moreover, regression analysis showed transformational leadership significantly enhanced the predictive capabilities of transactional leadership on teachers' collective efficacy. These results confirm the importance of leadership to predict collective efficacy and, by doing so, strengthen Bass's theory of leadership. PMID:18567210

  11. Melchizedek Stefanescu and Uniting of the Principalities

    Marius-Ioan Chindris

    2012-12-01

    Full Text Available The Union of the Principalities was a key event in Romanian history and played asignificant role in the formation of the Romanian state. Melchisedec Stefanescu (1823-1892, leadingfigure of the age, participated actively inthe front seeking the Unification of the RomanianPrincipalities and was one of the leading militants of the union, along with his contemporaries. Hismultilateral personality (scholar, priest and writer was completed by that of a patriot. The conclusionof my article is that hisrole and involvement, far from being secondary, made possible the transitionfrom tradition to modernity and progress. The research is mostly synchronous, analyzing theinteraction between cultures in order to create a cultural diagnosis for the eighteenth century.

  12. Data Clustering via Principal Direction Gap Partitioning

    Abbey, Ralph; Diepenbrock, Jeremy; Langville, Amy; Meyer, Carl; Race, Shaina; Zhou, Dexin

    2012-01-01

    We explore the geometrical interpretation of the PCA based clustering algorithm Principal Direction Divisive Partitioning (PDDP). We give several examples where this algorithm breaks down, and suggest a new method, gap partitioning, which takes into account natural gaps in the data between clusters. Geometric features of the PCA space are derived and illustrated and experimental results are given which show our method is comparable on the datasets used in the original paper on PDDP.

  13. 12 CFR 19.240 - Inflation adjustments.

    2010-01-01

    ... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Inflation adjustments. 19.240 Section 19.240... PROCEDURE Civil Money Penalty Inflation Adjustments § 19.240 Inflation adjustments. (a) The maximum amount... Civil Penalties Inflation Adjustment Act of 1990 (28 U.S.C. 2461 note) as follows: ER10NO08.001 (b)...

  14. A principal components model of soundscape perception.

    Axelsson, Östen; Nilsson, Mats E; Berglund, Birgitta

    2010-11-01

    There is a need for a model that identifies underlying dimensions of soundscape perception, and which may guide measurement and improvement of soundscape quality. With the purpose to develop such a model, a listening experiment was conducted. One hundred listeners measured 50 excerpts of binaural recordings of urban outdoor soundscapes on 116 attribute scales. The average attribute scale values were subjected to principal components analysis, resulting in three components: Pleasantness, eventfulness, and familiarity, explaining 50, 18 and 6% of the total variance, respectively. The principal-component scores were correlated with physical soundscape properties, including categories of dominant sounds and acoustic variables. Soundscape excerpts dominated by technological sounds were found to be unpleasant, whereas soundscape excerpts dominated by natural sounds were pleasant, and soundscape excerpts dominated by human sounds were eventful. These relationships remained after controlling for the overall soundscape loudness (Zwicker's N(10)), which shows that 'informational' properties are substantial contributors to the perception of soundscape. The proposed principal components model provides a framework for future soundscape research and practice. In particular, it suggests which basic dimensions are necessary to measure, how to measure them by a defined set of attribute scales, and how to promote high-quality soundscapes. PMID:21110579

  15. Elementary School Principals' Attitude towards Technology and Their Computer Experience.

    Akbaba Altun, Sadegul

    This paper examined school principals' attitude toward technology, their computer experience, and the relationship between them. The research population consisted of all public elementary school principals in Antalya, Turkey (n=124). It was found that school principals tended to have a positive attitude toward technology, although principals were…

  16. A Program Evaluation of a Leadership Academy for School Principals

    Wagner, Kristi E.

    2014-01-01

    This program evaluation focused on mid-range outcomes of a leadership academy for school principals. The mixed-methods evaluation included interviews, principals' instructional observation database, and teacher surveys. The Principal Academy program was designed to build principals' knowledge of high-yield instructional strategies (Hattie, 2009),…

  17. The Interdependence of Principal School Leadership and Student Achievement

    Soehner, David; Ryan, Thomas

    2011-01-01

    This review illuminated principal school leadership as a variable that impacted achievement. The principal as school leader and manager was explored because these roles were thought to impact student achievement both directly and indirectly. Specific principal leadership behaviors and principal effectiveness were explored as variables potentially…

  18. Speaking rate adjustment across changes in talker

    Newman, Rochelle S.; Sawusch, James R.

    2002-05-01

    Individuals vary their speaking rate, and listeners use the speaking rate of precursor sentences to adjust for these changes [Kidd (1989)]. Recent work has suggested that speaking rate adjustment may not always be limited to speech from a single talker (Sawusch and Newman, 2000). When a talker change occurs in the midst of a vowel, the durations of both portions of the vowel influence perception of the rate-based contrast. In the present experiments, we examined the effect of talker change on rate normalization for precursor phrases. A male talker produced the sentence, I heard him say the word-at one of three different speaking rates. A female talker then produced a nonword containing a duration-based contrast. We examined whether the male talker's speaking rate would influence perception of the female talker's speech. The results were somewhat surprising. The speaking rate of the first talker did influence perception of the contrast in the second talker. However, the effect was a U-shaped function of speaking rate, rather than the linear function typically demonstrated in the single-voice condition. Several follow-up studies replicated this basic pattern. Implications of this finding for studies of rate normalization will be discussed.

  19. Multi-toning Image Adjustment

    LIU Shi-guang; WANG Xiao-juan; PENG Qun-sheng

    2011-01-01

    Due to the different lighting environments or other reasons, the pixel colors may be quite different in one image which causes distinct visual discontinuities. It makes the analysis and processing of such an image more difficult and sometime impossible. In this paper, a unified multi-toning image adjustment method is proposed to solve this problem. First, a novel unsupervised clustering method was proposed to partition the source and the target image into a certain number of subsets with similar color statistics. By matching the texture characteristics and luminance distribution between the blocks, it can create optimized correspondence. Then, the color information was transferred from the matched pixels in the source blocks to the target ones. Graph cut method was used to optimize the seams between different subsets in the final step. This method can automatically perform color adjustment of a multi-toning image. It is simple and efficient. Various results show the validity of this method.

  20. Adjustment problems and residential care environment

    Jan Sebastian Novotný

    2015-01-01

    Full Text Available Problem: Residential care environment represents a specific social space that is associated with a number of negative consequences, covering most aspects of children and youth functioning. The paper analyzes of the presence of adjustment problems among adolescents from institutional care environment and compares this results with a population of adolescents who grew up in a family. Methods: The sample consisted of two groups of adolescents. The first group included 285 adolescents currently growing up in an residential care environment, aged 13 to 21 (M = 16.23, SD = 1.643. The second group consisted of 214 adolescents growing up in a family, aged 15 to 20 (M = 17.07, SD = 1.070. We used a questionnaire Youth Self Report. Data were analyzed using descriptive statistics and MANOVA. Results: Results showed that adolescents in residential care exhibit higher average values in all adjustment problems. Also, in the context of diagnostic categories are the residential care adolescents more frequently in non-normal range (borderline and clinical, primarily in the border range. The greatest differences were reflected in the Thought problems and Rule-breaking behavior. MANOVA showed a significant multivariate effect between groups of adolescents, Hotelling's T = .803, F(8, 490 = 49.202, p <.001, d = .445 (large effect. Univariate analysis further showed a significant effect for Withdrawn/depressed (p = .044, d = .089, small effect, Somatic complaints (p = .002, d = .139, medium effect, Social problems (p = 004, d = .127, a small effect, Thought problems (p <.001, d = .633, strong effect, Attention problems (p <.001, d = .320,strong effect, Rule-breaking behavior (p <.001 , d = .383, strong effect, and Aggressive behavior (p = 015, d = .110, small effect. Results for the dimension of Anxious/depressed were not significant (p = .159. Discussion: The results didn’t confirmed the assumption that more than 30% of residential care adolescents have adjustment

  1. Control of Adjustable Compliant Actuators

    Berno J.E. Misgeld; Kurt Gerlach-Hahn; Daniel Rüschen; Anake Pomprapa; Steffen Leonhardt

    2014-01-01

    Adjustable compliance or variable stiffness actuators comprise an additional element to elastically decouple the actuator from the load and are increasingly applied to human-centered robotic systems. The advantages of such actuators are of paramount importance in rehabilitation robotics, where requirements demand safe interaction between the therapy system and the patient. Compliant actuator systems enable the minimization of large contact forces arising, for example, from muscular spasticity...

  2. Parenting Perfectionism and Parental Adjustment

    Lee, Meghan A.; Schoppe-Sullivan, Sarah J.; Kamp Dush, Claire M.

    2012-01-01

    The parental role is expected to be one of the most gratifying and rewarding roles in life. As expectations of parenting become ever higher, the implications of parenting perfectionism for parental adjustment warrant investigation. Using longitudinal data from 182 couples, this study examined the associations between societal- and self-oriented parenting perfectionism and new mothers’ and fathers’ parenting self-efficacy, stress, and satisfaction. For mothers, societal-oriented parenting perf...

  3. Focal Adjustment for Star Tracker

    Liu Hai-bo; Jian-kun Yang; Ji-chun Tan; De-zhi Su; Wen-liang Wang; Xiu-jian Li; Hui Jia

    2010-01-01

    Technique of measuring intensity distribution and size of spot image developed has been discussed, which is especially suitable for defocus adjustment in ground test of star tracker. A novel approach for choosing a proper defocusing position has been proposed based on collimator, Gaussian surface fitting method, and other ordinary instruments. It proves to be practical and adequate in the development of distant object tracking such as star tracker.Defence Science Journal, 2010, 60(6), pp.678-...

  4. Sliding Adjustment for 3D Video Representation

    Galpin Franck

    2002-01-01

    Full Text Available This paper deals with video coding of static scenes viewed by a moving camera. We propose an automatic way to encode such video sequences using several 3D models. Contrary to prior art in model-based coding where 3D models have to be known, the 3D models are automatically computed from the original video sequence. We show that several independent 3D models provide the same functionalities as one single 3D model, and avoid some drawbacks of the previous approaches. To achieve this goal we propose a novel algorithm of sliding adjustment, which ensures consistency of successive 3D models. The paper presents a method to automatically extract the set of 3D models and associate camera positions. The obtained representation can be used for reconstructing the original sequence, or virtual ones. It also enables 3D functionalities such as synthetic object insertion, lightning modification, or stereoscopic visualization. Results on real video sequences are presented.

  5. Estimating term structure changes using principal component analysis in Indian sovereign bond market

    Nath, Golaka

    2012-01-01

    This paper analyses the India sovereign yield to find out the principal factors affecting the term structure of interest rate changes. We apply Principal Component Analysis (PCA) on our data consisting of zero coupon interest rates derived from government bond trading using Nelson-Siegel functional form. This decomposition of the yield curve highlights important relationship between identified factors and metrics of the term structure shape. The empirical findings support statistical similari...

  6. Understanding Why Principals Leave or Stay in Challenging Urban Schools

    Evans, Donald Eugene

    2010-01-01

    There is growing concern with principal turnover in urban schools. School districts are struggling to find qualified and effective principals to lead schools. With accountability on the rise and increasing demands, the job has become more challenging than in previous years. Using a case study format, this study focuses on six principals, 3 principals that have left the position and 3 principals currently in their position at the elementary level at different challenging schools in the Bay A...

  7. Extremal properties of principal curves in the plane

    Duchamp, Tom; Stuetzle, Werner

    1996-01-01

    Principal curves were introduced to formalize the notion of "a curve passing through the middle of a dataset." Vaguely speaking, a curve is said to pass through the middle of a dataset if every point on the curve is the average of the observations projecting onto it. This idea can be made precise by defining principal curves for probability densities. In this paper we study principal curves in the plane. Like linear principal components, principal curves are critical points of the expected sq...

  8. Do Qualification, Experience and Age Matter for Principals Leadership Styles?

    Muhammad Javed Sawati; Saeed Anwar; Muhammad Iqbal Majoka

    2013-01-01

    The main focus of present study was to find out the prevalent leadership styles of principals in government schools of Khyber Pakhtunkhwa and to find relationship of leadership styles with qualifications, age and experience of the principals. On the basis of analyzed data, four major leadership styles of the principals were identified as Eclectic, Democratic, Autocratic, and Free-rein. However, a small proportion of the principal had no dominant leadership style. This study shows that princip...

  9. Uncertainty study of the PWR pressure vessel fluence. Adjustment of the nuclear data base

    The code system devoted to the calculation of the sensitivity and uncertainty of of the neutron flux and reaction rates calculated by the transport codes, has been developed. Adjustment of the basic data to experimental results can be performed as well. Various sources of uncertainties can be taken into account, such as those due to the uncertainties in the cross-sections, response functions, fission spectrum and space distribution of neutron source, geometry and material composition uncertainties... One -As well as two- dimensional analysis can be performed. Linear perturbation theory is applied. The code system is sufficiently general to be used for various analysis in the fields of fission and fusion. The principal objective of our studies concerns the capsule dosimetry study realized in the framework of the 900 MWe PWR pressure vessel surveillance program. The analysis indicates that the present calculations, performed by the code TRIPOLI-2, using the ENDF/B-IV based, non-perturbed neutron cross-section library in 315 energy groups, allows to estimate the neutron flux and the reaction rates in the surveillance capsules and in the most calculated and measured reaction rates permits to reduce these uncertainties. The results obtained with the adjusted iron cross-sections, response functions and fission spectrum show that the agreement between the calculation and the experiment was improved to become within 10% approximately. The neutron flux deduced from the experiment is then extrapolated from the capsule to the most exposed pressure vessel location using the calculated lead factor. The uncertainty in this factor was estimated to be about 7%. (author). 39 refs., 52 figs., 30 tabs

  10. Characteristic classes of quantum principal bundles

    Durdevic, M

    1995-01-01

    A noncommutative-geometric generalization of classical Weil theory of characteristic classes is presented, in the conceptual framework of quantum principal bundles. A particular care is given to the case when the bundle does not admit regular connections. A cohomological description of the domain of the Weil homomorphism is given. Relations between universal characteristic classes for the regular and the general case are analyzed. In analogy with classical geometry, a natural spectral sequence is introduced and investigated. The appropriate counterpart of the Chern character is constructed, for structures admitting regular connections. Illustrative examples and constructions are presented.

  11. Poor adjustment to college life mediates the relationship between drinking motives and alcohol consequences: A look at college adjustment, drinking motives, and drinking outcomes

    LaBrie, Joseph W.; Ehret, Phillip J.; Hummer, Justin F.; Prenovost, Katherine

    2011-01-01

    The current study examined whether the relationship between drinking motives and alcohol-related outcomes was mediated by college adjustment. Participants (N=253) completed an online survey that assessed drinking motives, degree of both positive and negative college adjustment, typical weekly drinking, and past month negative alcohol-related consequences. Structural equation modeling examined negative alcohol consequences as a function of college adjustment, drinking motives, and weekly drink...

  12. Adjustable extender for instrument module

    A blank extender module used to mount an instrument module in front of its console for repair or test purposes has been equipped with a rotatable mount and means for locking the mount at various angles of rotation for easy accessibility. The rotatable mount includes a horizontal conduit supported by bearings within the blank module. The conduit is spring-biased in a retracted position within the blank module and in this position a small gear mounted on the conduit periphery is locked by a fixed pawl. The conduit and instrument mount can be pulled into an extended position with the gear clearing the pawl to permit rotation and adjustment of the instrument

  13. Focal Adjustment for Star Tracker

    Liu Hai-bo

    2010-10-01

    Full Text Available Technique of measuring intensity distribution and size of spot image developed has been discussed, which is especially suitable for defocus adjustment in ground test of star tracker. A novel approach for choosing a proper defocusing position has been proposed based on collimator, Gaussian surface fitting method, and other ordinary instruments. It proves to be practical and adequate in the development of distant object tracking such as star tracker.Defence Science Journal, 2010, 60(6, pp.678-682, DOI:http://dx.doi.org/10.14429/dsj.60.36

  14. Boosting Principal Component Analysis by Genetic Algorithm

    Divya Somvanshi

    2010-07-01

    Full Text Available This paper presents a new method of feature extraction by combining principal component analysis and genetic algorithm. Use of multiple pre-processors in combination with principal component analysis generates alternate feature spaces for data representation. The present method works out the fusion of these multiple spaces to create higher dimensionality feature vectors. The fused feature vectors are given chromosome representation by taking feature components to be genes. Then these feature vectors are allowed to undergo genetic evolution individually. For genetic algorithm, initial population is created by calculating probability distance matrix, and by applying a probability distance metric such that all the genes which lie farther than a defined threshold are tripped to zero. The genetic evolution of fused feature vector brings out most significant feature components (genes as survivours. A measure of significance is adapted on the basis of frequency of occurrence of the surviving genes in the current population. Finally, the feature vector is obtained by weighting the original feature components in proportion to their significance. The present algorithm is validated in combination with a neural network classifier based on error backpropagation algorithm, and by analysing a number of benchmark datasets available in the open sources.Defence Science Journal, 2010, 60(4, pp.392-398, DOI:http://dx.doi.org/10.14429/dsj.60.495

  15. Real-time Robust Principal Components' Pursuit

    Qiu, Chenlu

    2010-01-01

    In the recent work of Candes et al, the problem of recovering low rank matrix corrupted by i.i.d. sparse outliers is studied and a very elegant solution, principal component pursuit, is proposed. It is motivated as a tool for video surveillance applications with the background image sequence forming the low rank part and the moving objects/persons/abnormalities forming the sparse part. Each image frame is treated as a column vector of the data matrix made up of a low rank matrix and a sparse corruption matrix. Principal component pursuit solves the problem under the assumptions that the singular vectors of the low rank matrix are spread out and the sparsity pattern of the sparse matrix is uniformly random. However, in practice, usually the sparsity pattern and the signal values of the sparse part (moving persons/objects) change in a correlated fashion over time, for e.g., the object moves slowly and/or with roughly constant velocity. This will often result in a low rank sparse matrix. For video surveillance a...

  16. Two ‘Heads’ Are Better Than One An Examination and Analysis of the Role of the Deputy Principal in Irish Primary Schools.

    Allen, Terence

    2004-01-01

    This study examines and analyses the role o f the deputy principal in Irish Primary Schools in the building o f professional learning communities in the school. It focuses on what functions or tasks have been “assigned” to or negotiated with the deputy principal to improve teacher efficacy and student learning. It examines the extent to which the deputy principal and the principal are mutually supportive o f each other and other colleagues in the sustainability o f the school a...

  17. The Optimal Solution of the Model with Physical and Human Capital Adjustment Costs

    RAO Lan-lan; CAI Dong-han

    2004-01-01

    We prove that the model with physical and human capital adjustment costs has optimal solution when the production function is increasing return and the structure of vetor fields of the model changes substantially when the prodution function from decreasing return turns to increasing return.And it is shown that the economy is improved when the coefficients of adjustment costs become small.

  18. Mexican-origin parents' work conditions and adolescents' adjustment.

    Wheeler, Lorey A; Updegraff, Kimberly A; Crouter, Ann

    2015-06-01

    Mexican-origin parents' work experiences are a distal extrafamilial context for adolescents' adjustment. This 2-wave multiinformant study examined the prospective mechanisms linking parents' work conditions (i.e., self-direction, work pressure, workplace discrimination) to adolescents' adjustment (i.e., educational expectations, depressive symptoms, risky behavior) across the transition to high school drawing on work socialization and spillover models. We examined the indirect effects of parental work conditions on adolescent adjustment through parents' psychological functioning (i.e., depressive symptoms, role overload) and aspects of the parent-adolescent relationship (i.e., parental solicitation, parent-adolescent conflict), as well as moderation by adolescent gender. Participants were 246 predominantly immigrant, Mexican-origin, 2-parent families who participated in home interviews when adolescents were approximately 13 and 15 years of age. Results supported the positive impact of fathers' occupational self-direction on all 3 aspects of adolescents' adjustment through decreased father-adolescent conflict, after controlling for family socioeconomic status and earner status, and underemployment. Parental work pressure and discrimination were indirectly linked to adolescents' adjustment, with different mechanisms emerging for mothers and fathers. Adolescents' gender moderated the associations between fathers' self-direction and girls' depressive symptoms, and fathers' experiences of discrimination and boys' risk behavior. Results suggest that Mexican-origin mothers' and fathers' perceptions of work conditions have important implications for multiple domains of adolescents' adjustment across the transition to high school. PMID:25938710

  19. On variance estimate for covariate adjustment by propensity score analysis.

    Zou, Baiming; Zou, Fei; Shuster, Jonathan J; Tighe, Patrick J; Koch, Gary G; Zhou, Haibo

    2016-09-10

    Propensity score (PS) methods have been used extensively to adjust for confounding factors in the statistical analysis of observational data in comparative effectiveness research. There are four major PS-based adjustment approaches: PS matching, PS stratification, covariate adjustment by PS, and PS-based inverse probability weighting. Though covariate adjustment by PS is one of the most frequently used PS-based methods in clinical research, the conventional variance estimation of the treatment effects estimate under covariate adjustment by PS is biased. As Stampf et al. have shown, this bias in variance estimation is likely to lead to invalid statistical inference and could result in erroneous public health conclusions (e.g., food and drug safety and adverse events surveillance). To address this issue, we propose a two-stage analytic procedure to develop a valid variance estimator for the covariate adjustment by PS analysis strategy. We also carry out a simple empirical bootstrap resampling scheme. Both proposed procedures are implemented in an R function for public use. Extensive simulation results demonstrate the bias in the conventional variance estimator and show that both proposed variance estimators offer valid estimates for the true variance, and they are robust to complex confounding structures. The proposed methods are illustrated for a post-surgery pain study. Copyright © 2016 John Wiley & Sons, Ltd. PMID:26999553

  20. 48 CFR 1450.103 - Contract adjustments.

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Contract adjustments. 1450.103 Section 1450.103 Federal Acquisition Regulations System DEPARTMENT OF THE INTERIOR CONTRACT... Contract adjustments....

  1. Labour Adjustment Costs and British Footwear Protection

    Winters, L. Alan

    1990-01-01

    Import protection is frequently advocated as a means of preserving jobs and avoiding labour adjustment costs. Defining adjustment costs in terms of output forgone during the process of adjustment and ignoring any general equilibrium repercussions, we estimate that quantitative restrictions on British footwear imports during 1979 protected about 1,000 jobs and avoided once-and-for-all adjustment costs of only around 1 million pounds sterling. The result is based on new data which reveal high r...

  2. Anchoring Adjusted Capital Asset Pricing Model

    Hammad, Siddiqi

    2015-01-01

    An anchoring adjusted Capital Asset Pricing Model (ACAPM) is developed in which the payoff volatilities of well-established stocks are used as starting points that are adjusted to form volatility judgments about other stocks. Anchoring heuristic implies that such adjustments are typically insufficient. ACAPM converges to CAPM with correct adjustment, so CAPM is a special case of ACAPM. The model provides a unified explanation for the size, value, and momentum effects in the stock market. A ke...

  3. COMPARISON OF ADJUSTABLE HIGH-PHASE ORDER INDUCTION MOTORS’ MERITS

    V.S. Petrushin

    2016-03-01

    Full Text Available Purpose. Development of mathematical models of adjustable electrical drives with high-phase order induction motors for their merits analysis at static and dynamical modes. Methodology. At the mathematical modeling main kinds of physical processes taking place in the high-phase order induction motors are considered: electromagnetic, electromechanical, energetic, thermal, mechanical, vibroacoustic ones. Besides, functional as well as mass, frame and value indicators of frequency converters are taking into account which permits to consider technical and economical aspects of the adjustable induction electrical drives. Creation of high-phase order induction motors’ modifications in possible on the base of a stock 3-phase motors of basic design. Polyphase supply of induction motors is guaranteed by a number of the adjustable electrical drives’ power circuits. Results. Modelling of a number of adjustable electrical drives with induction motors of different phase number working on the same load by its character, value and required adjustment range is carried out. At the utilization of the family of characteristics including mechanical ones at different adjustment parameters on which loading mechanism’s characteristics are superimposed regulation curves representing dependences of electrical, energetic, thermal, mechanical, vibroacoustic quantities on the motors’ number of revolutions are obtained. Originality. The proposed complex models of adjustable electrical drives with high-phase order induction motors give a possibility to carry out the grounded choice of the drive’s acceptable variant. Besides, they can be used as design models at the development of adjustable high-phase order induction motors. Practical value. The investigated change of vibroacoustic indicators at static and dynamical modes has been determined decrease of these indicators in the drives with number of phase exceeding 3.

  4. Power analysis of principal components regression in genetic association studies

    Yan-feng SHEN; Jun ZHU

    2009-01-01

    Association analysis provides an opportunity to find genetic variants underlying complex traits. A principal com-ponents regression (PCR)-based approach was shown to outperform some competing approaches. However, a limitation of this method is that the principal components (PCs) selected from single nucleotide polymorphisms (SNPs) may be unrelated to the phenotype. In this article, we investigate the theoretical properties of such a method in more detail. We first derive the exact power function of the test based on PCR, and hence clarify the relationship between the test power and the degrees of freedom (DF). Next, we extend the PCR test to a general weighted PCs test, which provides a unified framework for understanding the properties of some related statistics. We then compare the performance of these tests. We also introduce several data-driven adaptive alterna-tives to overcome difficulties in the PCR approach. Finally, we illustrate our results using simulations based on real genotype data. Simulation study shows the risk of using the unsupervised rule to determine the number of PCs, and demonstrates that there is no single uniformly powerful method for detecting genetic variants.

  5. Operative Time Definition and Principal Uncertainity

    Schön, M

    1993-01-01

    Arguments are given that time must be defined in an operative manner,i.e., by constructing devices which can serve as clocks.The investigation of such devices leads to the conclusion that there is a principal uncertainity of time if one considers periods which are not large compared with the Planck time. Thus,according to the old (classical) concept,time cannot be well-defined at this scale.The uncertainity of time leads to a breakdown of Special and General relativity in the Planck regime;the same happens with causality. We present arguments that the classical concept of time,which treats t simply as a real parameter,must be replaced by a new one.

  6. Regional principal color based saliency detection.

    Lou, Jing; Ren, Mingwu; Wang, Huan

    2014-01-01

    Saliency detection is widely used in many visual applications like image segmentation, object recognition and classification. In this paper, we will introduce a new method to detect salient objects in natural images. The approach is based on a regional principal color contrast modal, which incorporates low-level and medium-level visual cues. The method allows a simple computation of color features and two categories of spatial relationships to a saliency map, achieving higher F-measure rates. At the same time, we present an interpolation approach to evaluate resulting curves, and analyze parameters selection. Our method enables the effective computation of arbitrary resolution images. Experimental results on a saliency database show that our approach produces high quality saliency maps and performs favorably against ten saliency detection algorithms. PMID:25379960

  7. Principal aspects of the Ordovician biotic radiation

    2010-01-01

    The Ordovician radiation is among the major bioevents in earth history that have drawn great attention from geologists all over the world, and there have been hundreds of publications treating various aspects of this radiation. The study of the event involves a broad spectrum of research fields and concerns many scientific questions. Many opinions and hypotheses have been proposed on the triggering and controlling factors of the radiation. Herein the authors critically review the study of the Ordovician radiation and dissect four principal aspects by synthesizing the studies over the past years: (1) relationships of the radiation to fossil clades, ecotypes, and environments, such as water depth, latitude, and climate; (2) the ecological structure and food webs of Ordovician marine organisms; (3) fossil records and true biodiversities; and (4) likely triggering and controlling factors of the Ordovician radiation. The authors also recommend approaches to furthering studies of these aspects.

  8. Face Recognition Based on Principal Component Analysis

    Ali Javed

    2013-02-01

    Full Text Available The purpose of the proposed research work is to develop a computer system that can recognize a person by comparing the characteristics of face to those of known individuals. The main focus is on frontal two dimensional images that are taken in a controlled environment i.e. the illumination and the background will be constant. All the other methods of person’s identification and verification like iris scan or finger print scan require high quality and costly equipment’s but in face recognition we only require a normal camera giving us a 2-D frontal image of the person that will be used for the process of the person’s recognition. Principal Component Analysis technique has been used in the proposed system of face recognition. The purpose is to compare the results of the technique under the different conditions and to find the most efficient approach for developing a facial recognition system

  9. 12 CFR 1780.80 - Inflation adjustments.

    2010-01-01

    ... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Inflation adjustments. 1780.80 Section 1780.80... DEVELOPMENT RULES OF PRACTICE AND PROCEDURE RULES OF PRACTICE AND PROCEDURE Civil Money Penalty Inflation Adjustments § 1780.80 Inflation adjustments. The maximum amount of each civil money penalty within...

  10. Dimensions of Adjustment among College Women.

    Tomlinson-Clarke, Saundra

    1998-01-01

    Examines academic, social, and personal-emotional adjustment, as well as institutional attachment for women (N=198) attending a predominantly white coeducational research university. Significant main effects were found on academic achievement for year in college. Students differed on personal-emotional adjustment by race. Academic adjustment and…

  11. EVALUATION OF ADJUSTABLE SUTURE TECHNIQUE IN OUTCOME OF PTOSIS SURGERY

    Nagaraju

    2015-10-01

    Full Text Available AIM: To evaluate the outcome of adjustable suture technique in ptosis surgery. INTRODUCTION : Surgical management of blepharoptosis is indicated in multiple situations and the post - operative outcomes can be as variable as the indications for surgery. Adjustable suture techniques in ptosis repair have been introduced and variable efficacies have been reported. MATERIALS AND METHODS: A retrospective case review of medical records from June 2010 to May 2011 (12 months of 5 eyes of 5 consecutive patients operated by a single surgeon at a Tertiary Eye care center in South India were reviewed. The clinical profile of patients included was r ecorded and results of adjustable suture technique described by Borman and collegues for these patients was reported. RESULTS: 5 eyes of 5 patients underwent adjustable suture ptosis repair in the study duration. 4 patients with moderate and 1 with severe ptosis, all having good levator function were diagnosed to have c ongenital ptosis in 3 cases and a cquired involutional ptosis in 2 cases. All 5 cases had a satisfactory outcome at day 4 post - operative after adjustment of lid height in the out - patient clini c. 1 patient with acquired involutional ptosis, identified with levator dehiscence intra - operatively had overcorrection at 6 months warranting re - surgery while the other 4 patients had satisfactory cosmetic lid height and functional outcome at 6 months fol low up after the adjustable suture technique for ptosis repair. CONCLUSION: Use of adjustable sutures in ptosis surgery can eliminate the intraoperative lid factors that can lead to unpredictable results. The technique described is easy to adapt and perfor m and can give repeatable and well acceptable results in the properly selected cases

  12. How Principals Can Build Self-Renewing Schools.

    Reitzug, Ulrich C.; Burrello, Leonard C.

    1995-01-01

    Principals help teachers become more reflective practitioners by providing a supportive environment, using specific facilitative behaviors (asking questions, informally critiquing, and questioning program irregularities), and enabling program implementation. Principals create a supportive environment by encouraging justification of practice,…

  13. Principal eigenvalue in an unbounded domain with indefinite potential

    In this work, we discuss the existence and the non existence of principal eigenvalue in an unbounded domaine of RN for some potentials which change sign. We also give certain properties of this principal eigenvalue. (author)

  14. Social and Psychological Adjustment of Chinese Canadian Children

    Chen, Xinyin; Tse, Hennis Chi-Hang

    2010-01-01

    This study examined social and psychological adjustment of immigrant and Canadian-born Chinese children in Canada. Participants included a sample of elementary school children (N = 356, M age = 11 years). Data on social functioning, peer relationships, school-related social competence, perceived self-worth, and loneliness were collected from peer…

  15. Exploring Aspects of Coordination by Mutual Adjustment in Fluid Teams:

    Thomsen, Svend Erik

    This chapter applies an agent-based modeling approach to explore some aspects of team coordination by mutual adjustments. The teams considered here are cross functional teams, either co-located or distributed where individuals with specialized knowledge and skills work simultaneously together to...

  16. Agricultural policy adjustments in the Korean rice economy

    Kwon, Yong Dae; Yamauchi, Hiroshi

    1993-01-01

    A political preference function is used to endogenize government actions in a simultaneous equation model for South Korean rice policy. The effects of economic changes on rice pricing decisions through estimated political weights are tested to improve our understanding of policy adjustments in that country and open the way for further research in East Asia.

  17. Increasing Assistant Principals' Capacity for Success Based on the New Principal Evaluation Instrument

    Hager, Rhonda Keever

    2012-01-01

    The importance of leadership is critical with current accountability for student performance. The increased accountability for school leaders has caused a change in leadership roles to incorporate collaboration and shared leadership. Assistant principals are included in the concept of distributive leadership. A review of the literature shows…

  18. Principal Leadership for Special Education: Perceptions of Principals and Directors of Special Education

    Duncan, Angela Bost

    2010-01-01

    The purpose of this study was to explore the perceptions of public school leaders about principal leadership for special education in ten leadership categories: understanding law and policy, using data to improve teacher performance, using data to improve student performance, creating an inclusive culture, collaborating with families,…

  19. Teacher and Principal Perceptions of How Principal Transformational and Instructional Leadership Behaviors Relate to Student Achievement

    Steele, Gayle

    2012-01-01

    Because of public concern over the effectiveness of our schools, a new evaluation system was put in place to hold principals and teachers directly accountable for student academic achievement. Part of this evaluation included student performance on state assessments. The purpose of this qualitative study sought to examine how the transformation…

  20. A Preliminary Examination of the Impact of a Structured Principal Network on Principal Burnout

    Tillery, Denise Artus

    2012-01-01

    This study examined the extent to which participation in a formal network has on a principal's personal perception of burnout as measured by the Maslach Burnout Inventory for Educators (MBI-E). The MBI-E consists of 22 questions with responses indicated on a 7 point Likert scale ranging from 0-6. It measures three constructs of emotional…

  1. Steady State Performance Characteristics of a Single Pad Externally Adjustable Fluid Film Bearing

    Shenoy, Satish B.; Pai, Raghuvir

    The steady state performance characteristics of centrally loaded 60 degree single pad externally adjustable partial arc bearing is studied theoretically. Principal feature of the bearing is the facility to control its radial clearance and circumferential film thickness gradient, during operation. The bearing has aspect ratios of 1.0, 0.5 and 0.25 and operates over a wide range of eccentricity ratios and adjustments. Steady state performance characteristics of the bearing are presented in terms of attitude angle, load carrying capacity, oil flow and friction variable. The steady state form of Reynolds equation in two dimensions is solved numerically using the finite difference method. The effect of tilt and the radial adjustments on the steady state performance characteristics are presented in the form of plots. A comparative study predicts that negative radial and negative tilt adjustment results in better load carrying capacity with reduced oil flow and friction.

  2. Francis Bacon’s Qualification As A Principal Empiricist Philosopher

    2011-01-01

    The purpose of this paper is to determine if there is any basis for regarding FrancisBacon as a principal empiricist philosopher. This involves effort to determine whatconstitutes, in essence, the qualities of a principal empiricist philosopher. Are thereany criteria that qualify one as a principal empiricist philosopher? Proceeding with thisinquiry, our paper examines, on the one hand, the views of those who argue in defenceof Bacon’s qualification as a principal empiricist philosopher. Here...

  3. Francis Bacons Qualification As A Principal Empiricist Philosopher

    Ochulor, Chinenye Leo

    2011-01-01

    The purpose of this paper is to determine if there is any basis for regarding Francis Bacon as a principal empiricist philosopher. This involves effort to determine what constitutes, in essence, the qualities of a principal empiricist philosopher. Are there any criteria that qualify one as a principal empiricist philosopher? Proceeding with this inquiry, our paper examines, on the one hand, the views of those who argue in defence of Bacon’s qualification as a principal empiricist philosopher....

  4. Principals'Use of Data: A National Perspective

    Torrence, Vera D.

    2002-01-01

    The traditional role of Americaâ s principals is changing. The educational reform movement defines principals as instructional leaders responsible for creating professional learning communities in which learning and quality instruction are priorities. National standards for school leaders include the use of data as a resource for instructional leadership. Additionally, new principals are entering the field rapidly. Previous research on the use of data by principals is twenty years or older. ...

  5. Neighborhood Assets and Adolescent Adjustment

    Alfredo Oliva Delgado

    2011-12-01

    Full Text Available This paper presents the results of a study analyzing the relationship between some dimensions or developmental assets in the neighborhood, as measured by the Scale for the Assessment of Developmental Assets in the Neighborhood, and adjustment and life satisfaction of adolescent boys and girls. The sample consisted of 2400 adolescents (1068 boys and 1332 girls between ages 12 and 17 who were secondary students in public and private schools in Western Andalusia. The results showed significant relationships between most dimensions of the scale (youth empowerment, attachment to neighbourhood safety and social control and internalizing and externalizing problems, substance use and life satisfaction of participants. Moreover, the data provide evidence about the external validity of the scale used in the study. From the results some suggestions for intervention in the community environment are extracted.

  6. Culture, emotion regulation, and adjustment.

    Matsumoto, David; Yoo, Seung Hee; Nakagawa, Sanae

    2008-06-01

    This article reports differences across 23 countries on 2 processes of emotion regulation--reappraisal and suppression. Cultural dimensions were correlated with country means on both and the relationship between them. Cultures that emphasized the maintenance of social order--that is, those that were long-term oriented and valued embeddedness and hierarchy--tended to have higher scores on suppression, and reappraisal and suppression tended to be positively correlated. In contrast, cultures that minimized the maintenance of social order and valued individual Affective Autonomy and Egalitarianism tended to have lower scores on Suppression, and Reappraisal and Suppression tended to be negatively correlated. Moreover, country-level emotion regulation was significantly correlated with country-level indices of both positive and negative adjustment. PMID:18505309

  7. Principals Leading for Educational Equity: Social Justice in Action

    Eldridge, Cynthia Marie

    2012-01-01

    This qualitative case study examined how principals promote educational equity in schools. The study examined the experiences of three principals in a school district that mandated that principals lead for equity. The school system defined equity as the elimination of racial predictability in student achievement. To conduct this examination, the…

  8. Establishing Special Education Programs: Experiences of Christian School Principals

    Cookson, Gary; Smith, Samuel J.

    2011-01-01

    This phenomenological study investigated the experiences of principals who initiated special education programs in Christian schools. Principals described efforts involved to effect changes in the school and noted difficulties in dealing with reluctant staff members. Principals described academic and social rewards of providing services and the…

  9. Assessing Multiple Stakeholders' Perceptions of an Effective Principal Evaluation System

    Tran, Henry; Bon, Susan C.

    2015-01-01

    Existing principal evaluation research has failed to include the perspectives of multiple stakeholders. The present research study used focus group interviews to gather data about designing a principal evaluation process that includes these perspectives. Focus groups were conducted with principals, parents, certificated staff, and classified…

  10. Evaluating State Principal Evaluation Plans across the United States

    Fuller, Edward J.; Hollingworth, Liz; Liu, Jing

    2015-01-01

    Recent federal legislation has created strong incentives for states to adopt principal evaluation systems, many of which include new measures of principal effectiveness such as estimates of student growth and changes in school climate. Yet, there has been little research on principal evaluation systems and no state-by-state analysis of the…

  11. 32 CFR 767.6 - Credentials of principal investigator.

    2010-07-01

    ... 32 National Defense 5 2010-07-01 2010-07-01 false Credentials of principal investigator. 767.6... JURISDICATION OF THE DEPARTMENT OF THE NAVY Permit Guidelines § 767.6 Credentials of principal investigator. A... papers of the principal investigator (PI) must be submitted with the permit application. The PI must...

  12. Suicide in Middle Level Schools: Implications for Principals.

    Toepfer, Conrad F., Jr.

    1986-01-01

    Prevention of teenage suicide and coping with it when it occurs is an increasing concern for middle-level principals. This article focuses on specific implications of the youth suicide problem for middle-level principals with considerations for other principals as well. (Author/TE)

  13. Noncommutative principal torus bundles via parametrised strict deformation quantization

    Hannabuss, Keith; Mathai, Varghese

    2009-01-01

    In this paper, we initiate the study of a parametrised version of Rieffel's strict deformation quantization. We apply it to give a classification of noncommutative principal torus bundles, in terms of parametrised strict deformation quantization of ordinary principal torus bundles. The paper also contains a putative definition of noncommutative non-principal torus bundles.

  14. Contemporary Challenges and Changes: Principals' Leadership Practices in Malaysia

    Jones, Michelle; Adams, Donnie; Joo, Mabel Tan Hwee; Muniandy, Vasu; Perera, Corinne Jaqueline; Harris, Alma

    2015-01-01

    This article outlines the findings from a contemporary study of principals' leadership practices in Malaysia as part of the 7 System Leadership Study. Recent policy developments within Malaysia have increased principals' accountability and have underlined the importance of the role of the principals in transforming school performance and student…

  15. The Essence of the Principal Internship: A Phenomenological Study

    Bush, Shawnta M.

    2013-01-01

    This paper presents a phenomenological investigation of principals' experience as they reflect on the essence of the administration internship, an integral part of school administration preparation programs. Five principals, all within the initial year or two of their first public school principal job, revealed the essence of their internship…

  16. Principal Succession and Its Impact on Teacher Morale

    Meyer, Matthew J.; Macmillan, Robert B.; Northfield, Shawn

    2009-01-01

    Our detailed study of two secondary schools in Nova Scotia which had experienced regular principal succession examined succession and its impact on teacher morale. We found that the process of principal succession and the new principal's practices have the potential to change a school culture and both positively and negatively affect teacher and…

  17. How Professional Standards Guide Practice for School Principals

    Militello, Matthew; Fusarelli, Bonnie; Alsbury, Thomas; Warren, Thomas P.

    2013-01-01

    Purpose: The purpose of this study is to provide an empirical measure of how principals enact prescribed leadership standards into practice. The aim of the study was to ascertain how current school principals perceive the practice of a specific set of leadership standards. Design/methodology/approach: A total of 61 practicing school principals in…

  18. Principal Turnover: Upheaval and Uncertainty in Charter Schools?

    Ni, Yongmei; Sun, Min; Rorrer, Andrea

    2015-01-01

    Purpose: Informed by literature on labor market and school choice, this study aims to examine the dynamics of principal career movements in charter schools by comparing principal turnover rates and patterns between charter schools and traditional public schools. Research Methods/Approach: This study uses longitudinal data on Utah principals and…

  19. Recursive Principal Components Analysis Using Eigenvector Matrix Perturbation

    Deniz Erdogmus

    2004-10-01

    Full Text Available Principal components analysis is an important and well-studied subject in statistics and signal processing. The literature has an abundance of algorithms for solving this problem, where most of these algorithms could be grouped into one of the following three approaches: adaptation based on Hebbian updates and deflation, optimization of a second-order statistical criterion (like reconstruction error or output variance, and fixed point update rules with deflation. In this paper, we take a completely different approach that avoids deflation and the optimization of a cost function using gradients. The proposed method updates the eigenvector and eigenvalue matrices simultaneously with every new sample such that the estimates approximately track their true values as would be calculated from the current sample estimate of the data covariance matrix. The performance of this algorithm is compared with that of traditional methods like Sanger's rule and APEX, as well as a structurally similar matrix perturbation-based method.

  20. Suppressing Background Radiation Using Poisson Principal Component Analysis

    Tandon, P; Dubrawski, A; Labov, S; Nelson, K

    2016-01-01

    Performance of nuclear threat detection systems based on gamma-ray spectrometry often strongly depends on the ability to identify the part of measured signal that can be attributed to background radiation. We have successfully applied a method based on Principal Component Analysis (PCA) to obtain a compact null-space model of background spectra using PCA projection residuals to derive a source detection score. We have shown the method's utility in a threat detection system using mobile spectrometers in urban scenes (Tandon et al 2012). While it is commonly assumed that measured photon counts follow a Poisson process, standard PCA makes a Gaussian assumption about the data distribution, which may be a poor approximation when photon counts are low. This paper studies whether and in what conditions PCA with a Poisson-based loss function (Poisson PCA) can outperform standard Gaussian PCA in modeling background radiation to enable more sensitive and specific nuclear threat detection.

  1. NONLINEAR DATA RECONCILIATION METHOD BASED ON KERNEL PRINCIPAL COMPONENT ANALYSIS

    2003-01-01

    In the industrial process situation, principal component analysis (PCA) is a general method in data reconciliation.However, PCA sometime is unfeasible to nonlinear feature analysis and limited in application to nonlinear industrial process.Kernel PCA (KPCA) is extension of PCA and can be used for nonlinear feature analysis.A nonlinear data reconciliation method based on KPCA is proposed.The basic idea of this method is that firstly original data are mapped to high dimensional feature space by nonlinear function, and PCA is implemented in the feature space.Then nonlinear feature analysis is implemented and data are reconstructed by using the kernel.The data reconciliation method based on KPCA is applied to ternary distillation column.Simulation results show that this method can filter the noise in measurements of nonlinear process and reconciliated data can represent the true information of nonlinear process.

  2. Price and wage inflation inertia under time-dependent adjustments

    Di Bartolomeo Giovanni; Di Pietro Marco

    2013-01-01

    We derive and estimate a small-scale DSGE model augmented with price and wage adjustment governed by a time-dependent mechanisms. Byusing positively sloping hazard functions, we micro-found price and wage inflation intrinsic persistence, as we derive price and wage Phillips curves characterized by both forward and backward terms for inflation. Our estimation confirms upward-sloping hazard functions. Finally, we compare the empirical performance of our model to several popular alternatives bas...

  3. A large N phase transition in the continuum two dimensional SU(N) X SU(N) principal chiral model

    R. Narayanan; Neuberger, H.; Vicari, E.

    2008-01-01

    It is established by numerical means that the continuum large N principal chiral model in two dimensions has a phase transition in a smoothed two point function at a critical distance of the order of the correlation length.

  4. Stability of weak-coupled core power adjustment system

    The stability of the weak-coupled core power adjustment system was investigated. Coupling feedback coefficient and feedback transfer function of the weak-coupled core were set up. System stability analysis was performed by the power adjustment block diagram of the weak-coupled core, and the core power stable thresholds were obtained. Influence of the system parameter change on stable power threshold was analysed. Results show, under a given coupling condition, the system will be unstable when the power overtakes its threshold. The power threshold is decreasing when the coupling of two core areas is weakening, and the reactor could operate stably only on a lower power level

  5. Subjective performance evaluations and reciprocity in principal-agent relations

    Sebald, Alexander Christopher; Walzl, Markus

    2014-01-01

    We conduct a laboratory experiment with agents working on, and principals benefiting from, a real effort task in which the agents' performance can only be evaluated subjectively. Principals give subjective performance feedback to agents, and agents have an opportunity to sanction principals. In...... contrast to existing models of reciprocity, we find that agents tend to sanction whenever the feedback of principals is below their subjective self-evaluations even if agents' pay-offs are independent of it. In turn, principals provide more positive feedback (relative to their actual performance assessment...

  6. Measuring Principal Performance: How Rigorous Are Commonly Used Principal Performance Assessment Instruments? A Quality School Leadership Issue Brief

    Condon, Christopher; Clifford, Matthew

    2010-01-01

    This brief reviews the publicly available principal assessments and points superintendents and policy makers toward strong instruments to measure principal performance. Specifically, the measures included in this review are expressly intended to evaluate principal performance and have varying degrees of publicly available evidence of psychometric…

  7. Implementing a Cross-District Principal Mentoring Program: A Human Resources Approach to Developing Midcareer Principals' Leadership Capacities

    Della Sala, Matthew R.; Klar, Hans W.; Lindle, Jane Clark; Reese, Kenyae L.; Knoeppel, Robert C.; Campbell, Michael; Buskey, Frederick C.

    2013-01-01

    Despite the key role that principals play in leading schoolwide change, districts' efforts to support principals are often limited, particularly in rural settings. In this article, we report the preliminary findings of a cross-district mentoring program for nine midcareer rural school principals. The collaboratively developed human resource…

  8. Principal Component Analysis of SDSS Stellar Spectra

    McGurk, Rosalie C; Ivezic, Zeljko

    2010-01-01

    We apply Principal Component Analysis (PCA) to ~100,000 stellar spectra obtained by the Sloan Digital Sky Survey (SDSS). In order to avoid strong non-linear variation of spectra with effective temperature, the sample is binned into 0.02 mag wide intervals of the g-r color (-0.20

  9. Record of principal work activities/deliverables

    Over the five year period of performance, thirteen task assignments were issued by the DOE to ARINC Research. During the two year base period seven tasks were assigned. Two task assignments were issued for each of the three consecutive one year option periods. Associated with all task assignments were multiple subtasks, some of which required significant effort. These subtasks are appropriately cited in this report under their respective task assignments as principal work activities or deliverables. The technical and management support provided to the DOE under this contract focused on two general areas: (1) appraisal activities and (2) non-appraisal activities. Support to appraisals included planning, document review, developing lines-of-inquiry, interviewing, data collection, report writing, and follow-up. Such work was executed both on-site at the DOE facility under review and off-site. Non-appraisal support was varied and included such areas as document review, data base development, technical assessments. statistical analysis, policy analysis, reliability engineering, and workshop and conference planning and execution

  10. Principal component analysis of scintimammographic images.

    Bonifazzi, Claudio; Cinti, Maria Nerina; Vincentis, Giuseppe De; Finos, Livio; Muzzioli, Valerio; Betti, Margherita; Nico, Lanconelli; Tartari, Agostino; Pani, Roberto

    2006-01-01

    The recent development of new gamma imagers based on scintillation array with high spatial resolution, has strongly improved the possibility of detecting sub-centimeter cancer in Scintimammography. However, Compton scattering contamination remains the main drawback since it limits the sensitivity of tumor detection. Principal component image analysis (PCA), recently introduced in scintimam nographic imaging, is a data reduction technique able to represent the radiation emitted from chest, breast healthy and damaged tissues as separated images. From these images a Scintimammography can be obtained where the Compton contamination is "removed". In the present paper we compared the PCA reconstructed images with the conventional scintimammographic images resulting from the photopeak (Ph) energy window. Data coming from a clinical trial were used. For both kinds of images the tumor presence was quantified by evaluating the t-student statistics for independent sample as a measure of the signal-to-noise ratio (SNR). Since the absence of Compton scattering, the PCA reconstructed images shows a better noise suppression and allows a more reliable diagnostics in comparison with the images obtained by the photopeak energy window, reducing the trend in producing false positive. PMID:17646004

  11. A Consistent Semantics of Self-Adjusting Computation

    Acar, Umut A; Donham, Jacob

    2011-01-01

    This paper presents a semantics of self-adjusting computation and proves that the semantics are correct and consistent. The semantics integrate change propagation with the classic idea of memoization to enable reuse of computations under mutation to memory. During evaluation, reuse of a computation via memoization triggers a change propagation that adjusts the reused computation to reflect the mutated memory. Since the semantics integrate memoization and change-propagation, it involves both non-determinism (due to memoization) and mutation (due to change propagation). Our consistency theorem states that the non-determinism is not harmful: any two evaluations of the same program starting at the same state yield the same result. Our correctness theorem states that mutation is not harmful: self-adjusting programs are consistent with purely functional programming. We formalize the semantics and their meta-theory in the LF logical framework and machine check our proofs using Twelf.

  12. Nuclear data adjustment methodology utilizing resonance parameter sensitivities and uncertainties

    This work presents the development and demonstration of a Nuclear Data Adjustment Method that allows inclusion of both energy and spatial self-shielding into the adjustment procedure. The resulting adjustments are for the basic parameters (i.e., resonance parameters) in the resonance regions and for the group cross sections elsewhere. The majority of this development effort concerns the production of resonance parameter sensitivity information which allows the linkage between the responses of interest and the basic parameters. The resonance parameter sensitivity methodology developed herein usually provides accurate results when compared to direct recalculations using existing and well-known cross section processing codes. However, it has been shown in several cases that self-shielded cross sections can be very non-linear functions of the basic parameters. For this reason caution must be used in any study which assumes that a linear relationship exists between a given self-shielded group cross section and its corresponding basic data parameters

  13. Exploration adjustment by ant colonies.

    Doran, Carolina; Stumpe, Martin C; Sendova-Franks, Ana; Franks, Nigel R

    2016-01-01

    How do animals in groups organize their work? Division of labour, i.e. the process by which individuals within a group choose which tasks to perform, has been extensively studied in social insects. Variability among individuals within a colony seems to underpin both the decision over which tasks to perform and the amount of effort to invest in a task. Studies have focused mainly on discrete tasks, i.e. tasks with a recognizable end. Here, we study the distribution of effort in nest seeking, in the absence of new nest sites. Hence, this task is open-ended and individuals have to decide when to stop searching, even though the task has not been completed. We show that collective search effort declines when colonies inhabit better homes, as a consequence of a reduction in the number of bouts (exploratory events). Furthermore, we show an increase in bout exploration time and a decrease in bout instantaneous speed for colonies inhabiting better homes. The effect of treatment on bout effort is very small; however, we suggest that the organization of work performed within nest searching is achieved both by a process of self-selection of the most hard-working ants and individual effort adjustment. PMID:26909180

  14. Cosmological tests of General Relativity: a principal component analysis

    Hojjati, Alireza; Pogosian, Levon; Silvestri, Alessandra; Crittenden, Robert; Koyama, Kazuya

    2011-01-01

    The next generation of weak lensing surveys will trace the evolution of matter perturbations and gravitational potentials from the matter dominated epoch until today. Along with constraining the dynamics of dark energy, they will probe the relations between matter overdensities, local curvature, and the Newtonian potential. We work with two functions of time and scale to account for any modifications of these relations in the linear regime from those in the LCDM model. We perform a Principal Component Analysis (PCA) to find the eigenmodes and eigenvalues of these functions for surveys like DES and LSST. This paper builds on and significantly extends the PCA analysis of Zhao et al. (2009) in several ways. In particular, we consider the impact of some of the systematic effects expected in weak lensing surveys. We also present the PCA in terms of other choices of the two functions needed to parameterize modified growth on linear scales, and discuss their merits. We analyze the degeneracy between the modified gro...

  15. An exploration into the applicability of school principals' training on the principals' leadership practices in Finland

    Kakon Montua Ajua, Shantal

    2012-01-01

    Quality leadership preparation has been shown to have positive influences on leadership practices of graduates. With five formal categories of leadership training programmes in the decentralized Finnish educational system, little is known about the leadership practices of graduates. This study explored the applicability of training on principals’ self-assessed leadership practices in Central Finland. Eight semi-structured individual interviews were conducted with principals from schools i...

  16. Evaluation of an adjustable epidemiologic information system.

    Jiunn-Shyan Julian Wu

    Full Text Available BACKGROUND: In order to facilitate public health response and to achieve early control of infectious disease epidemics, an adjustable epidemiologic information system (AEIS was established in the Taiwan public health network in February 2006. METHODOLOGY/PRINCIPAL FINDINGS: The performance of AEIS for the period 2006 through 2008 was evaluated based on a number of response times (RT and the public health impact. After implementation of the system, the apparent overall shortened RT was mainly due to the shortening of personnel response time (PRT and the time needed to draft a new questionnaire that incurred as personnel-system interface (PSI; PRT dropped from a fluctuating range of 9.8 ∼28.8 days in the first four months to <10 days in the following months and remained low till 2008 (0.88±1.52 days. The PSIs for newly emerged infectious diseases were 2.6 and 3.4 person-hours for H5N1 in 2007 and chikungunya in 2008, respectively, a much improvement from 1142.5 person-hours for SARS in 2003. The duration of each rubella epidemic cluster was evaluated as public health impact and showed a shortening trend (p = 0.019 that concurred with the shortening of PRT from 64.8±47.3 to 25.2±38.2 hours per cluster (p<0.0001. CONCLUSIONS/SIGNIFICANCE: The first evaluation of the novel instrument AEIS that had been used to assist Taiwan's multi-level government for infectious diseases control demonstrated that it was well integrated into the existing public health infrastructure. It provided flexible tools and computer algorithms with friendly interface for timely data collection, integration, and analysis; as a result, it shortened RTs, filled in gaps of personnel lacking sufficient experiences, created a more efficient flow of response, and identified asymptomatic/mild cases early to minimize further spreading. With further development, AEIS is anticipated to be useful in the application of other acute public health events needing immediate

  17. Differentiation, Adjustment of Th 17 and it's Main Cytokines and Function%Th17细胞的分化、调节及其主要细胞因子和功能

    陈和敏; 申婷; 游晶; 张茹意; 杨波; 陈思如

    2015-01-01

    In recent years,Th17 cell characterized by secreting ID17 is a cell subset supposed to be different from Th1 and Th2 cells,it is found that has changed people traditional classification recognition that Th cells are only classified into Th1 and Th2.Th17 cell are involved in the autoimmune disease,the occurrence of tumor and the pathogenesis of various intimation,that secreting cytokines play an important role in biological functions of Th17.At the same time,the activation of Th17 cells needs various growth factors,cytokines such as IL-6 and IL-23,Th1 7 cell activated further promotes the secretion of various cytokines,and causes inflammation by secreting cytokines such as IL-17,IL-21,IL-21,IL-26 and TNFα.%近几年来以分泌白介素17(interleukin 17,IL-17)为特征的辅助性T细胞Th17(T help cell 17,Th17)细胞被认为是有区别于Th1(T help cell 1,Th1)、Th2(T help cell 2,Th2)新型的细胞亚群,它的发现改变了以往人们只将Th细胞分为Th1、Th2的传统分类认识.Th17细胞参与了自身免疫疾病、肿瘤的发生及机体各种炎症的发病机制,其分泌的细胞因子在生物学功能中发挥了极其重要的作用.同时Th17细胞的活化需要各种转化生长因子、IL-6(interleukin6,IL-6)、IL-23(interleukin 23,IL-23)等细胞因子的参与,活化的Th17细胞同时再进一步的促进各种细胞因子的分泌,以通过分泌LI-17、IL-21(interleukin 21,IL-21)、IL-22 (interleukin 22,IL-22)、IL-26(interleukin 26,IL-26)、肿瘤坏死因子(tumor necrosis factor,TNF)α等细胞因子导致机体炎症等各种疾病的发生.

  18. The Rational Reflection and the Effective Response to the School Function under the Background of the School Layout Adjustment%教育布局调整背景下的学校功能:理性反思与有效应对

    杨晓奇; 王浩熙

    2015-01-01

    学校具有维持与发展社会不同阶层教育,传递和发展不同社会阶层文化,维系不同阶层的人际关系与社会关系,推进社会政治经济技术进步等诸多功能。社会目前的教育布局调整则导致了农村学校的文化辐射功能萎缩、个体发展功能偏失、服务属地社会人力资本功能削弱、学校链接的人际关系疏离等。因此,实现学校功能与教育布局调整的双向调适,重视和保留部分小规模的农村学校,是保证学校功能正常发挥必由之路。%The functions of schools are as follows: to maintain and improve the education for different social stratums, to transfer and develop the culture of different social aspects, to keep up different personal and social re-lationships, and to advance the social politics and the economy and technology concerning with individual, organi-zation, community, and the whole society.The current school layout adjustment, however, causes problems inclu-ding the shrinking of cultural function of schools in the countryside, the disappearing of developmental function of individuals, the weakening of serving the local social human capital, and the isolating of the interpersonal relation-ships linked with schools.Therefore more attention should be paid to these problems.The adjustment of the school function and the school layout should be adapted to each other.Small-scaled country schools should not only be re-served but also be well constructed so that they can release the whole function normally.

  19. Revenge and psychological adjustment after homicidal loss.

    van Denderen, Mariëtte; de Keijser, Jos; Gerlsma, Coby; Huisman, Mark; Boelen, Paul A

    2014-01-01

    Feelings of revenge are a common human response to being hurt by others. Among crime victims of severe sexual or physical violence, significant correlations have been reported between revenge and Posttraumatic Stress Disorder (PTSD). Homicide is one of the most severe forms of interpersonal violence. It is therefore likely that individuals bereaved by homicide experience high levels of revenge, which may hamper efforts to cope with traumatic loss. The relationship between revenge and psychological adjustment following homicidal loss has not yet been empirically examined. In the current cross-sectional study, we used self-report data from 331 spouses, family members and friends of homicide victims to examine the relationships between dispositional revenge and situational revenge on the one hand and symptom-levels of PTSD and complicated grief, as well as indices of positive functioning, on the other hand. Furthermore, the association between revenge and socio-demographic and offense-related factors was examined. Participants were recruited from a governmental support organization, a website with information for homicidally bereaved individuals, and members of support groups. Levels of both dispositional and situational revenge were positively associated with symptoms of PTSD and complicated grief, and negatively with positive functioning. Participants reported significantly less situational revenge in cases where the perpetrator was a direct family member than cases where the perpetrator was an indirect family member, friend, or someone unknown. Homicidally bereaved individuals reported more situational revenge, but not more dispositional revenge than a sample of students who had experienced relatively mild interpersonal transgressions. PMID:24910007

  20. Recent progress in adjustable X-ray optics for astronomy

    Reid, Paul B.; Allured, R.; Cotroneo, V.; McMuldroch, S.; Marquez, V.; Schwartz, D. A.; Vikhlinin, A.; O'Dell, S. L.; Ramsey, B.; Trolier-McKinstry, S.; Johnson-Wilke, R.; Wilke, R. H.

    2014-01-01

    Two adjustable X-ray optics approaches are being developed for thin grazing incidence optics for astronomy. The first approach employs thin film piezoelectric material sputter deposited as a continuous layer on the back of thin, lightweight Wolter-I mirror segments. The piezoelectric material is used to correct mirror figure errors from fabrication, mounting/alignment, and any ground to orbit changes. The goal of this technology is to produce Wolter mirror segment pairs corrected to 0.5 arc sec image resolution. With the combination of high angular resolution and lightweight, this mirror technology is suitable for the Square Meter Arc Second Resolution Telescope for X-rays (SMART-X) mission concept.. The second approach makes use of electrostrictive adjusters and full shell nickel/cobalt electroplated replication mirrors. An array of radial adjusters is used to deform the full shells to correct the lowest order axial and azimuthal errors, improving imaging performance from the 10 - 15 arc sec level to ~ 5 arc sec. We report on recent developments in both technologies. In particular, we discuss the use of in-situ strain gauges on the thin piezo film mirrors for use as feedback on piezoelectric adjuster functionality, including their use for on-orbit figure correction. We also report on the first tests of full shell nickel/cobalt mirror correction with radial adjusters.

  1. Recent Progress in Adjustable X-ray Optics for Astronomy

    Reid, Paul B.; Allured, Ryan; Cotroneo, Vincenzo; McMuldroch, Stuart; Marquez, Vanessa; Schwartz, Daniel A.; Vikhlinin, Alexey; ODell, Stephen L.; Ramsey, Brian; Trolier-McKinstry, Susan; Johnson-Wilke, Raegan; Wilke, Rudeger H.

    2014-01-01

    Two adjustable X-ray optics approaches are being developed for thin grazing incidence optics for astronomy. The first approach employs thin film piezoelectric material sputter deposited as a continuous layer on the back of thin, lightweight Wolter-I mirror segments. The piezoelectric material is used to correct mirror figure errors from fabrication, mounting/alignment, and any ground to orbit changes. The goal of this technology is to produce Wolter mirror segment pairs corrected to 0.5 arc sec image resolution. With the combination of high angular resolution and lightweight, this mirror technology is suitable for the Square Meter Arc Second Resolution Telescope for X-rays (SMART-X) mission concept.. The second approach makes use of electrostrictive adjusters and full shell nickel/cobalt electroplated replication mirrors. An array of radial adjusters is used to deform the full shells to correct the lowest order axial and azimuthal errors, improving imaging performance from the 10 - 15 arc sec level to 5 arc sec. We report on recent developments in both technologies. In particular, we discuss the use of insitu strain gauges on the thin piezo film mirrors for use as feedback on piezoelectric adjuster functionality, including their use for on-orbit figure correction. We also report on the first tests of full shell nickel/cobalt mirror correction with radial adjusters.

  2. The School Psychologist: A Source of Expertise Available to School Principals for Collaborative Problem Solving.

    McNamara, James F.; Grossman, Barry; Lapierre, Coady B.; Laija, Wilda

    1998-01-01

    Explores how principals can use school psychologists' professional expertise in collaborative problem solving. Explains school psychologists' functions, shares a case study illustrating superintendent-psychologist cooperation in solving a drug abuse problem, outlines five possible problem-solving situations, identifies four myths of collaboration,…

  3. The Relationship between Principal Personality Type and Elementary School Student Achievement

    Roberson, Tamara Suzanne

    2010-01-01

    Providing effective administrative leadership that has a positive impact on student achievement often is problematic for school principals. Research suggests that collaboration and shared decision making are functions of effective leadership, and according to the premises of effective school instructional leadership, leadership should change with…

  4. Efficient Adjustable Reflectivity Smart Window

    D. Morgan Tench

    2005-12-01

    This project addressed the key technical issues for development of an efficient smart window based on reversible electrochemical transfer of silver between a mirror electrode and a localized counter electrode. Effort to provide uniform switching over large areas focused on use of a resistive transparent electrode innerlayer to increase the interelectrode resistance. An effective edge seal was developed in collaboration with adhesive suppliers and an electrochromic device manufacturer. Work to provide a manufacturable counter electrode focused on fabricating a dot matrix electrode without photolithography by electrodeposition of Pt nuclei on inherent active sites on a transparent oxide conductor. An alternative counter electrode based on a conducting polymer and an ionic liquid electrolyte was also investigated. Work in all of these areas was successful. Sputtered large-bandgap oxide innerlayers sandwiched between conductive indium tin oxide (ITO) layers were shown to provide sufficient cross-layer resistance (>300 ohm/cm{sup 2}) without significantly affecting the electrochemical properties of the ITO overlayer. Two edge seal epoxies, one procured from an epoxy manufacturer and one provided by an electrochromic device manufacturer in finished seals, were shown to be effective barriers against oxygen intrusion up to 80 C. The optimum density of nuclei for the dot matrix counter electrode was attained without use of photolithography by electrodeposition from a commercial alkaline platinum plating bath. Silver loss issues for cells with dot matrix electrodes were successfully addressed by purifying the electrolyte and adjusting the cell cycling parameters. More than 30K cycles were demonstrated for a REM cell (30-cm square) with a dot matrix counter electrode. Larger cells (30-cm square) were successfully fabricated but could not be cycled since the nucleation layers (provided by an outside supplier) were defective so that mirror deposits could not be produced.

  5. Trade Liberalization and Trade Adjustment Assistance

    Fung, K. C.; Staiger, Robert W.

    1994-01-01

    We explore the relationship between trade adjustment subsidies and successful reciprocal trade liberalization. We consider economies that are faced with a periodic need to move resources out of a declining import-competing sector, and that are attempting to sustain cooperative but self-enforcing trade agreements in the face of these adjustment needs. If the limitations associated with enforcement of international trade agreements are sufficiently severe, trade adjustment assistance can facili...

  6. Asian immigrant settlement and adjustment in Australia.

    Khoo, S; Kee, P; Dang, T; Shu, J

    1994-01-01

    "This article provides a broad assessment of the settlement and adjustment of people born in the many countries of Asia who are resident in Australia, based on recently available data from the 1991 Census of Population and Housing. It examines some indicators of economic adjustment such as performance in the labor market, and some indicators of social adjustment, such as acquisition of English language proficiency." PMID:12289777

  7. Attitude-adjusting table for neutron monochromator

    The neutron monochromator attitude-adjusting table is one of the mechanical components for most monochromatic neutron scattering spectrometer. It is mainly used for mounting crystal monochromator, and getting monochromatic neutron by adjusting the attitude of monochromator remotely. The table has a compact volume and five adjusting axes with high resolution. It combines optic mechanical electronic technique with computer control technique. This device will be applied to the neutron residual stress spectrometer on CARR firstly. (authors)

  8. An adjustment cost model of distributional dynamics.

    Getachew, Yoseph; Basu, Parantap

    2012-01-01

    We analyze the distributional e¤ects of adjustment cost in an environment with incomplete capital market. We find that a higher adjustment cost for human capital acquisition slows down the intergenerational mobility and results in a persistent inequality across generations. A low depreciation cost of human capital contributes to longer life of the capital which could elevate this adjustment cost and hence contribute to this inequality persistence. A lower total factor productivity could hurt...

  9. Measuring Acculturation Gap Conflicts among Hispanics: Implications for Psychosocial and Academic Adjustment

    Basáñez, Tatiana; Dennis, Jessica M.; Crano, William; Stacy, Alan; Jennifer B. Unger

    2013-01-01

    This study examined the factor structure and validity of the Acculturation Gap Conflicts Inventory (AGCI), a new instrument developed to measure the types of recurring conflicts that young people experience as part of the parent–child acculturation gap. Participants included 283 Hispanic young adults who completed the AGCI and existing measures of acculturation, family dynamics, psychosocial, and academic adjustment. Principal axis factor analysis revealed three factors with good internal con...

  10. Corporal Punishment and Child Adjustment

    Aucoin, Katherine J.; Frick, Paul J.; Bodin, S. Doug

    2006-01-01

    The association between corporal punishment and children's emotional and behavioral functioning was studied in a sample of 98 non-referred children with a mean age of 12.35 (SD=1.72) recruited from two school systems in the southeastern United States. Children were divided into those who had experienced no corporal punishment over approximately a…

  11. Family Correlates of Adjustment Profiles in Mexican-Origin Female Adolescents

    Bamaca-Colbert, Mayra Y.; Gayles, Jochebed G.; Lara, Rebecca

    2011-01-01

    This study used a person-centered approach to examine patterns of adjustment along psychological (i.e., depression, self-esteem, anxiety) and academic (i.e., academic motivation) domains in a sample (N = 338) of Mexican-origin female adolescents. Four adjustment profiles were identified. A "High Functioning" (n = 173) group, which exhibited high…

  12. Adjustment to College in Nonresidential First-Year Students: The Roles of Stress, Family, and Coping

    Gefen, Dalia R.; Fish, Marian C.

    2013-01-01

    This study explored factors related to college adjustment in nonresidential first-year students. It was hypothesized that stress, family functioning, and coping strategies would predict academic, personal-emotional, and social adjustment in addition to institutional attachment. The sample comprised 167 first-year college students (ages 18-23)…

  13. The Leadership Roles of a Principal in Improving School Effectiveness

    Burhanuddin Burhanuddin

    2016-01-01

    The purpose of this study was to investigate the leadership roles and practices of the principal in improving school effectiveness. This descriptive study involved the principal , counselor, and 11 teachers from the Tonsley Park Primary School in South Australia. The findings showed that all respondents generally regarded team leader as the most important role, while supervisor was rated as the least important. Of the 20 tasks observed, generally revealed that a principal should work cooperat...

  14. Low complexity adaptive algorithms for Principal and Minor Component Analysis

    Thameri, Messaoud; Abed-Meraim, Karim; Belouchrani, Adel

    2013-01-01

    This article introduces new low cost algorithms for the adaptive estimation and tracking of principal and minor components. The proposed algorithms are based on the well-known OPAST method which is adapted and extended in order to achieve the desired MCA or PCA (Minor or Principal Component Analysis). For the PCA case, we propose efficient solutions using Givens rotations to estimate the principal components out of the weight matrix given by OPAST method. These solutions are then extended to th...

  15. Stepping Stones: Principal Career Paths and School Outcomes

    Tara Béteille; Demetra Kalogrides; Susanna Loeb

    2011-01-01

    More than one out of every five principals leaves their school each year. In some cases, these career changes are driven by the choices of district leadership. In other cases, principals initiate the move, often demonstrating preferences to work in schools with higher achieving students from more advantaged socioeconomic backgrounds. Principals often use schools with many poor or low-achieving students as stepping stones to what they view as more desirable assignments. We use longitudinal dat...

  16. Distributed Principal Component Analysis for Wireless Sensor Networks

    Gianluca Bontempi; Sylvain Raybaud; Yann-Aël Le Borgne

    2010-01-01

    The Principal Component Analysis (PCA) is a data dimensionality reduction tech-nique well-suited for processing data from sensor networks. It can be applied to tasks like compression, event detection, and event recognition. This technique is based on a linear trans-form where the sensor measurements are projected on a set of principal components. When sensor measurements are correlated, a small set of principal components can explain most of the measurements variability. This allows to signif...

  17. Principal succession: The socialisation of a primary school principal in South Africa

    Gertruida M. Steyn

    2013-04-01

    Full Text Available This study focussed on the socialisation of a new principal in a South African primary school with a strong Christian culture. He was appointed when the predecessor retired after more than two decades. The conceptual framework focuses on the three phases of socialisation: professional socialisation, organisational socialisation and occupational identity, which are used to interpret the study. A qualitative study, which occurred during two phases, investigated the phenomenon, principal succession, in the particular school. The data collection methods included a number of interviews with the principal, a focus group interview with staff members who experienced the previous principal’s leadership practice, and individual interviews with staff members. The following categories emerged from the data analysis: Recalling the previous principal: ‘One sees Mr X [the predecessor] everywhere’; Entry and orientation: ‘I found it intimidating initially’; and Immersion and reshaping: ‘Reins that previously were a bit slack, he is now pulling tight’.Die sosialisering van ’n primêre skoolhoof in Suid-Afrika. Hierdie studie het gefokus op die sosialisering van ’n nuwe skoolhoof in ’n Suid-Afrikaanse primêre skool met ’n sterk Christelike kultuur. Hy is aangestel toe sy voorganger ná meer as twee dekades afgetree het. Die konseptuele raamwerk, wat gebruik is om die bevindinge te interpreteer, het op die drie fases van sosialisering gefokus, naamlik professionele sosialisering, organisatoriese sosialisering en beroepsidentiteit. ’n Kwalitatiewe ondersoek na die skoolhoofopvolgingverskynsel in die bepaalde skool is in twee fases gedoen. Die data-insamelingsmetodes het ’n aantal onderhoude met die skoolhoof, ’n fokusgroeponderhoud met personeellede wat ook onder leierskap van die vorige skoolhoof gewerk het en individuele onderhoude met personeellede ingesluit. Tydens die data-analise het die volgende kategorieë na vore gekom

  18. 75 FR 59684 - Trade Adjustment Assistance for Farmers

    2010-09-28

    ... Foreign Agricultural Service Trade Adjustment Assistance for Farmers AGENCY: Foreign Agricultural Service... analyzed by USDA's Economic Research Service and reviewed by the Trade Adjustment Assistance for Farmers... adjustment assistance in FY 2011. FOR FURTHER INFORMATION CONTACT: Trade Adjustment Assistance for...

  19. Adjustment of the Internal Tax Scale

    2013-01-01

    In application of Article R V 2.03 of the Staff Regulations, the internal tax scale has been adjusted with effect on 1 January 2012. The new scale may be consulted via the CERN Admin e-guide.  The notification of internal annual tax certificate for the financial year 2012 takes into account this adjustment. HR Department (Tel. 73907)

  20. Ergonomically Adjustable School Furniture for Male Students

    Al-Saleh, Khalid S.; Ramadan, Mohamed Z.; Al-Ashaikh, Riyad A.

    2013-01-01

    The need for adjustability in school furniture, in order to accommodate the variation in anthropometric measures of different genders, cultures and ages is becoming increasingly important. Four chair-table combinations, different in dimensions, with adjustable chair seating heights and table heights were designed, manufactured and distributed to…

  1. 24 CFR 886.112 - Rent adjustments.

    2010-04-01

    ... Adjustment Factor most recently published by HUD in the Federal Register in accordance with 24 CFR part 888... unassisted housing in the area to ensure that adjustments in the Contract Rents shall not result in material differences between the rents charged for assisted and comparable unassisted units. Contract Rents may...

  2. A Digital Game for International Students' Adjustment

    Bisadi, Maryam; Chua, Alton Y. K; Keong, Lee Chu

    2013-01-01

    Although digital games have been developed for various subject areas, little attention has been focused on using digital games to address international students' adjustment issues. For this reason, this paper endeavors to explore the use of a digital game in facilitating international students acquire adjustment-related information. Specifically,…

  3. 10 CFR 905.34 - Adjustment provisions.

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Adjustment provisions. 905.34 Section 905.34 Energy DEPARTMENT OF ENERGY ENERGY PLANNING AND MANAGEMENT PROGRAM Power Marketing Initiative § 905.34 Adjustment... continue to take place based on existing contract/marketing criteria principles....

  4. 34 CFR 36.2 - Penalty adjustment.

    2010-07-01

    ... 34 Education 1 2010-07-01 2010-07-01 false Penalty adjustment. 36.2 Section 36.2 Education Office of the Secretary, Department of Education ADJUSTMENT OF CIVIL MONETARY PENALTIES FOR INFLATION § 36.2... applicable) penalty amount 20 U.S.C. 1015(c)(5) Provides for a fine of up to $25,000 for failure by...

  5. Application of principal component analysis (PCA) as a sensory assessment tool for fermented food products.

    Ghosh, Debasree; Chattopadhyay, Parimal

    2012-06-01

    The objective of the work was to use the method of quantitative descriptive analysis (QDA) to describe the sensory attributes of the fermented food products prepared with the incorporation of lactic cultures. Panellists were selected and trained to evaluate various attributes specially color and appearance, body texture, flavor, overall acceptability and acidity of the fermented food products like cow milk curd and soymilk curd, idli, sauerkraut and probiotic ice cream. Principal component analysis (PCA) identified the six significant principal components that accounted for more than 90% of the variance in the sensory attribute data. Overall product quality was modelled as a function of principal components using multiple least squares regression (R (2) = 0.8). The result from PCA was statistically analyzed by analysis of variance (ANOVA). These findings demonstrate the utility of quantitative descriptive analysis for identifying and measuring the fermented food product attributes that are important for consumer acceptability. PMID:23729852

  6. Principal Shapes and Squeezed Limits in the Effective Field Theory of Large Scale Structure

    Bertolini, Daniele

    2016-01-01

    We apply an orthogonalization procedure on the effective field theory of large scale structure (EFT of LSS) shapes, relevant for the angle-averaged bispectrum and non-Gaussian covariance of the matter power spectrum at one loop. Assuming natural-sized EFT parameters, this identifies a linear combination of EFT shapes - referred to as the principal shape - that gives the dominant contribution for the whole kinematic plane, with subdominant combinations suppressed by a few orders of magnitude. For the covariance, our orthogonal transformation is in excellent agreement with a principal component analysis applied to available data. Additionally we find that, for both observables, the coefficients of the principal shapes are well approximated by the EFT coefficients appearing in the squeezed limit, and are thus measurable from power spectrum response functions. Employing data from N-body simulations for the growth-only response, we measure the single EFT coefficient describing the angle-averaged bispectrum with $\\...

  7. Catchment- and reach-scale controls on the distribution and expectation of geomorphic channel adjustment

    Lisenby, Peyton E.; Fryirs, Kirstie A.

    2016-05-01

    Variability in channel function (behavior) can be assessed by characterizing different forms of adjustment over time. Here, historical channel adjustments in three tributary systems of the Lockyer Valley, Southeast Queensland (SEQ) are analyzed in order to evaluate the range of catchment- and reach-scale controls on channel behavior. Over 300 individual adjustments and 13 forms of adjustment were identified over a ˜130 year time span. We measured the width-to-depth ratio (W:D), mean stream power (ω), and basin area (A) at the location of all observed adjustments. The most common forms of adjustment were avulsions, lateral expansion of the channel, and bend adjustments. The tributary systems behave distinctly different from one another according to statistical comparisons between the W:D, ω, and A data for these forms of adjustment. We find that it is possible to develop process domains or typologies for forms of geomorphic adjustment found in the Lockyer Valley. These domains or typologies provide the foundations for synoptic comparisons between catchments and assessing the expectation of channel adjustment (forecasting), which should be included in process-based river management practice.

  8. Principal sources of EMI identification and fixes

    The sources of disruptive energy involved in an EMI episode all fall in one or the other of two types: intentional emitters or incidental emitters. Intentional emitters, such as communications transmitters, radars, walkie talkies etc., depend on emitting energy to satisfy the functional role assigned to the. Incidental emitters are those devices that emit energy unintentionally and are not dependent on those emissions to fulfill the assigned function. Power line conducted emissions typically fall in this latter category. The corrective action to be taken in controlling a problem that is present in a system is quite different if an incidental emitter is involved from that which is proper if an intentional emitter is present. Some of the methods that can be used to identify the emission sources which are contributing to a problem are presented in this paper along with some of the possible corrective actions that can be applied. 7 figs

  9. Attachment for sucker rod depth adjustment

    Collins, N.D.

    1992-04-07

    This patent describes a surface unit of an oil well pumping system, having a walking beam, a suspended carrier bar and an interconnected sucker rod assembly for stroking a reciprocating down-hole pump. It comprises a cross bar having a centrally located passage therein for the sucker rod assembly and adapted to be transversely supported by the carrier bar; a depth adjusting bar, having a centrally located passage therein for the sucker rod assembly, positioned at a selected fixed dimension above and parallel to the cross bar and adapted to operatively support the sucker rod assembly; clamping means for fixing the sucker rod relative to the depth adjusting bar; and hydraulically extendable means supportively connecting the depth adjusting bar to the cross bar on at least each side of the carrier bar for adjusting the selected fixed dimension and maintaining the adjustment during operation.

  10. Cultural Distance Asymmetry in Expatriate Adjustment

    Selmer, Jan; Chiu, Randy K.; Shenkar, Oded

    2007-01-01

    the assignment. Design/methodology/approach - Using a two-flow sample of US expatriates in Germany and German expatriates in the USA, we examine and compare the psychological and socio-cultural adjustment of each group of executives. Findings - Controlling for the length of assignment, we find that...... German expatriates in the USA were better adjusted, both socio-culturally and psychologically, than American expatriates in Germany. These results support the asymmetry hypothesis and call into question previous findings attesting to the relationship between CD and expatriate adjustment. Originality......Purpose - The current literature implicitly assumes a symmetric impact of cultural distance (CD) on expatriate adjustment. By using distance as a predictor of adjustment, the literature has rendered the direction of the flow irrelevant: a US expatriate in Germany is presumed to face the same hurdle...

  11. Vocational and social adjustment after laryngectomy.

    Goldberg, R T

    1975-01-01

    This study examined the vocational and social adjustment of 62 persons with cancer of the larynx. Predisability data were obtained by interview on 14 measures which assessed the vocational, social, and home adjustment prior to cancer. Post-disability data were obtained after laryngectomy by interview on 21 measures of adjustment. Additional measures include severity of laryngeal cancer classified by clinival stages, total or partial laryngectomy, presence of radiation therapy, presence of speech, months since surgery, age, sex, education, and marital status. The best predictors of vocational and social adjustment after laryngectomy were: removation, realism, rehabiltation outlook, previous vocational plans, highest educational grade, educational plans, and acquisition of speech. There were no significant differences in adjustment among patients in different clinical stages. PMID:1135615

  12. Principal component analysis for authorship attribution

    Amir Jamak; Alen Savatic; Mehmet Can

    2012-01-01

    Background: To recognize the authors of the texts by the use of statistical tools, one first needs to decide about the features to be used as author characteristics, and then extract these features from texts. The features extracted from texts are mostly the counts of so called function words. Objectives: The data extracted are processed further to compress as a data with less number of features, such a way that the compressed data still has the power of effective discriminators. In this case...

  13. Principal leadership style, school performance, and principal effectiveness in Dubai schools

    Ibrahim, Ali S.

    2013-01-01

    Full Text Available This study investigated whether a correlation exists between the principal’s leadership style and both a performance level and b the principal’s effectiveness in schools in Dubai. It also investigated whether the correlations change according to the principal’s gender, years of experience, and the level of the school (primary, intermediate, and secondary. Data on principals’ leadership styles and effectiveness were collected through Avolio and Bass’ (1995 Multifactor Leadership Questionnaire (MLQ completed by teachers in 34 government schools. Data on school performance were obtained from the 2010 Dubai Schools Inspection Bureau report. The study found that the transformational leadership style was most frequently employed, followed by the transactional style, and then the passive or avoidant style. The study found a positive correlation between the principal leadership style and his/her effectiveness, but found no correlation with school performance. Finally, principal style and effectiveness differed according to the principal’s gender and the level of the school, but not according to the principal’s years of experience. Findings of this study open a new area of research on school principalship, performance, and effectiveness in the UAE.

  14. Study of School Evaluation System in Japan : Focus on the perception of principals and vice-principals

    Makia, Cisse

    2008-01-01

    This study examines the perception of principals and vice-principals in the school evaluation system in Japan. Two hundred and twenty-seven administrators of Primary, Secondary, and High schools in Ishikawa Prefecture were surveyed. The important material for this study was gathered in Prefectural INSET conducted in 2005. The survey was also conducted to explore the principals' perceptions of performance feedback, and utility of the evaluation process. The data used for the study was the prin...

  15. Fatigue, depression, and social adjustment in chronic fatigue syndrome.

    Walford, G.A.; Nelson, W. M.; McCluskey, D R

    1993-01-01

    The aims of this study were to determine the characteristics and perceived levels of fatigue and the prevalence of depression in children with chronic fatigue syndrome and to assess the effects of illness on schooling and social functioning. Twelve children with chronic fatigue syndrome were compared with a matched group of children with cystic fibrosis and matched healthy controls. Levels of fatigue (fatigue questionnaire), depression (children's depression inventory), and social adjustment ...

  16. Cross-Cultural Adjustment of Chinese Students in Japan: School Adjustment and Educational Support

    Li, Yuan Xiang; Sano, Hideki; Ahn, Ruth

    2013-01-01

    This study investigates Chinese immigrant students' cross-cultural and school adjustment issues in Japanese schools. Using a quantitative method, a survey which collected students' demographic information, cross-cultural adjustment, and school adjustment questions was administered to 143 Chinese junior high and high school students in…

  17. Environmentally adjusted oil and grease

    With the intention of maintaining healthy environment in our rivers Vattenfall in 1988 initiated a project called 'Environmentally friendly oils'. The goal was to find oils for bearings and hydraulic systems that would cause less negative environmental effects and still maintain a good technical function. Based on the results of the project it is recommended, for both economical and environmental reasons, to change to synthetic oil in bearings and to hydraulic oil made of white oil in regulating systems. The change may be carried out in connection to other work on the system in question. Special care is recommended when cleaning the system from old oil and dirt. In order to maintain the high quality of the oil, also during manufacturing and assembling, one should follow the recommendations outlined in the report. In bearings where used grease leaks into the river, a grease made of white oil should be used. The quality of the rubber sealings must be adapted to the oil used, in order to secure a good function. In order to bring down the number of products and to create an open market some additional changes is necessary in the specifications of oil. Further research regarding oil and sealing is planned. (3 refs.)

  18. Understanding school leadership: A mixed methods study of the context and needs of serving and aspiring post primary school principals A mixed methods study of the context and needs of serving and aspiring post primary school principals

    Cuddihy, Nicholas John

    2012-01-01

    This research study which was undertaken in part completion of the requirements for the award of a Professional Doctorate of Education in Dublin City University seeks to articulate how the education system can best respond to the needs of serving and aspiring post primary school principals. The author presents a general survey of school leadership literature which identifies the leadership of learning as the core function of post primary school principals and a short appraisal of research lit...

  19. Teacher Contract Non-Renewal: What Matters to Principals?

    Nixon, Andy; Packard, Abbot; Dam, Margaret

    2016-01-01

    This quantitative study investigated the relationship between teacher dispositions, subject content knowledge, pedagogical content knowledge, and reasons that school principals recommend non-renewal of teachers' contracts. Nearly 2,000 school principals in 13 states completed an emailed survey. In deciding whether to non-renew a teacher contract,…

  20. Teacher Contract Non-Renewal: Southeast and Midwest Principals

    Nixon, Andy; Packard, Abbot L; Dam, Margaret

    2011-01-01

    This quantitative study investigated reasons that school principals recommend non-renewal of probationary teachers' contracts. Principals in the Southeast and Midwest completed an emailed survey. The ordinal nature of the data gathered dictated that comparisons be made between groups using the Mann Whitney U. The study investigated the barriers…

  1. Principals' Management Behavior, Personality Types and Physiological Stress.

    Cooper, Bruce S.; And Others

    1988-01-01

    Data from portable heart-rate monitors and work diaries were used to relate Mintzberg's "nature of managerial work" to physiological stress in small number of working principals over three complete work days. Principals found to be working under extreme stress for long hours, and certain activities were more stressful than others. Implications are…

  2. Emerging Technology Trends and Ethical Practices for the School Principal

    Garland, Virginia E.

    2010-01-01

    What is the school principal's role in ensuring ethical technology use while promoting the use of wireless and advanced technologies in instruction? The rapid advances in technology in only the past 5 years, including the increase in laptops and smart phones, have transformed both educational practices and the role of the school principal as…

  3. Teachers' Perceptions of African American Principals' Leadership in Urban Schools.

    Jones, Cornel

    2002-01-01

    Examined the perceptions of teachers of color and European American teachers regarding their African American principals' ability to lead successful urban schools. Survey and interview data indicated that in the areas of image management and relationship development, the two groups perceived their principals' leadership differently.(SM)

  4. Alignment between Principal and Teacher Beliefs about Technology Use

    Alghamdi, Abdulmajeed; Prestridge, Sarah

    2015-01-01

    This paper explores the link between principals' and teachers' beliefs regarding technology use in teaching and learning. Principals who have a clear vision for carrying out the pedagogical requirements for technological change in teaching and learning approaches can direct the use of technology to enhance the school learning environment.…

  5. A Longitudinal Study of Principals' Activities and Student Performance

    May, Henry; Huff, Jason; Goldring, Ellen

    2012-01-01

    Although a substantial amount of research on school leadership has focused on what principals may do to improve teaching and learning, little of this research has explored how principals' time spent on leadership activities may relate to and possibly affect student performance. This article presents results from a 3-year longitudinal study of…

  6. Principal and Teacher Beliefs about Leadership Implications for Student Performance

    Jackson, Jerri C.

    2013-01-01

    The goal of this study was to examine whether the leadership style of principals affects teacher and student performance. The study includes an elementary, middle, and high school principal along with two teachers from each school who worked at schools that were in good standing from 2007-2011. Each school made adequate yearly progress (AYP) each…

  7. Career Paths in Educational Leadership: Examining Principals' Narratives

    Parylo, Oksana; Zepeda, Sally J.; Bengtson, Ed

    2012-01-01

    This qualitative study analyzes the career path narratives of active principals. Structural narrative analysis was supplemented with sociolinguistic theory and thematic narrative analysis to discern the similarities and differences, as well as the patterns in the language used by participating principals. Thematic analysis found four major themes…

  8. 13 CFR 115.13 - Eligibility of Principal.

    2010-01-01

    ... Section 115.13 Business Credit and Assistance SMALL BUSINESS ADMINISTRATION SURETY BOND GUARANTEE Provisions for All Surety Bond Guarantees § 115.13 Eligibility of Principal. (a) General eligibility. In order to be eligible for a bond guaranteed by SBA, the Principal must comply with the...

  9. Principals' Participation Levels in Best Practices for School Improvement

    Stogdill, Christopher T.

    2010-01-01

    The purpose of this study was to identify Nebraska principal perceptions regarding the level of participation the AdvancED school improvement process. Further, the study identified differences among principals' knowledge, based on demographic characteristics of years of experience, size of school enrollments, and formal training in school…

  10. Principal Preservice Education for Leadership in Inclusive Schools

    Lyons, Wanda

    2016-01-01

    Principal leadership has been identified as the key to successful implementation of inclusive education for students with disabilities. Prospective principals require knowledge, skills, and dispositions to equip them to work with key stakeholders to initiate and sustain inclusive practices within their schools. The purpose of this action research…

  11. The Relationship between Principals' Transformational Leadership Behaviors and School Culture

    Bolton, David A.

    2011-01-01

    This quantitative study looks at the relationship between a principals' transformational leadership behaviors and the culture of their school. The goal of the study is to determine if transformational leadership qualities have a positive impact on the culture present in a school. Congruency between the views of a principal and their staff will…

  12. Quantum principal bundles as Hopf-Galois extensions

    Durdevic, M

    1995-01-01

    It is shown that every quantum principal bundle with a compact structure group is a Hopf-Galois extension. This property naturally extends to the level of general differential structures, so that every differential calculus over a quantum principal bundle with a compact structure group is a graded-differential variant of the Hopf-Galois extension.

  13. Principals' Perceptions and Practices of School Bullying Prevention Activities

    Dake, Joseph A.; Price, James H.; Telljohann, Susan K.; Funk, Jeanne B.

    2004-01-01

    The purpose of this study was to examine principals' perceptions and practices regarding bullying prevention. A survey instrument was developed to assess principals' stages of change and perceived barriers regarding selected bullying prevention activities as well as the effectiveness of bullying prevention activities. Of a national random sample…

  14. Principal Leadership Style, Personality Type, and School Climate.

    Hardin, Dawn T.

    1995-01-01

    Relationships among principal leadership style, personality type, and school climate were studied in urban and rural contexts using responses from 34 principals and 166 teachers in three similar school districts. No relationship was found between personality type and leadership style, and no urban/rural differences were found for these variables…

  15. Defamation of and by Principals. A Legal Memorandum.

    Zirkel, Perry A.

    Defamation is a common-law claim for liability that encompasses "libel," which is the written form, and "slander," which is the oral form. School principals can be plaintiffs or defendants in defamation suits. Relevant case law provides illustrations of the various elements of defamation for both roles of the principal. Court decisions involving…

  16. Investing in Leadership: The District's Role in Managing Principal Turnover

    Mascall, Blair; Leithwood, Kenneth

    2010-01-01

    This article presents the results of research into the impact of principal turnover on schools, and the ability of schools to mitigate the negative effects of frequent turnover by distributing leadership in the schools. The findings from this qualitative and quantitative analysis show that rapid principal turnover does indeed have a negative…

  17. New Principals' Perspectives of Their Multifaceted Roles

    Gentilucci, James L.; Denti, Lou; Guaglianone, Curtis L.

    2013-01-01

    This study utilizes Symbolic Interactionism to explore perspectives of neophyte principals. Findings explain how these perspectives are modified through complex interactions throughout the school year, and they also suggest preparation programs can help new principals most effectively by teaching "soft" skills such as active listening…

  18. An Introductory Application of Principal Components to Cricket Data

    Manage, Ananda B. W.; Scariano, Stephen M.

    2013-01-01

    Principal Component Analysis is widely used in applied multivariate data analysis, and this article shows how to motivate student interest in this topic using cricket sports data. Here, principal component analysis is successfully used to rank the cricket batsmen and bowlers who played in the 2012 Indian Premier League (IPL) competition. In…

  19. The Relationship of Principal Conflict Management Style and School Climate

    Boucher, Miriam Miley

    2013-01-01

    Using a mixed-methods design, this study examined conflict management styles of elementary school principals in South Carolina and the relationship of conflict management style and school climate. The Rahim Organizational Conflict Inventory-II, Form B, which identifies five styles of managing conflict, was used to determine principal conflict…

  20. Principal's Experience and Teachers' Satisfaction in Lebanese Secondary Schools.

    Theodory, George C.

    1981-01-01

    Investigates Fiedler's contingency theory regarding the relationship between the years of experience of principals rated as high and low LPC (Least Preferred Coworker) and the satisfaction of teachers in their schools. Subjects were 93 principals and 627 secondary school teachers. (Author/CM)

  1. Principal Concerns: Iowa May Face Statewide Demand. Data Brief

    DeArmond, Michael; Ouijdani, Monica

    2012-01-01

    When people talk about human capital or talent in public education, they generally focus on teachers, not principals. That's a mistake. School districts and states generally don't take a strategic approach toward managing their principal workforce. Often, they lack even the most basic information about who is leading their schools: Where do most…

  2. High School Principals as Leaders: Styles and Sources of Power

    Brinia, Vasiliki; Papantoniou, Eva

    2016-01-01

    Purpose: The purpose of this paper is to present the characteristics of leadership (style adopted, sources of power exercised and factors affecting leadership) of high school principals in Greece. Design/Methodology/Approach: In total, 235 school principals were surveyed using questionnaires. These questionnaires assessed how often they adopted…

  3. Principals' Leadership Styles and ESL Teachers' Job Satisfaction

    Jackson, K. A'jaydin

    2013-01-01

    The purpose of this research study was to examine principals' leadership styles and how and what extent it impacted teachers' job satisfaction. Principals' leadership styles were examined by middle and high school teachers' perceptions. This study drew from 10 middle and 10 high schools in a large school district located in Texas. Participants…

  4. Describing an "Effective" Principal: Perceptions of the Central Office Leaders

    Parylo, Oksana; Zepeda, Sally J.

    2014-01-01

    The purpose of this qualitative study was to examine how district leaders of two school systems in the USA describe an effective principal. Membership categorisation analysis revealed that district leaders believed an effective principal had four major categories of characteristics: (1) documented characteristics (having a track record and being a…

  5. The Principal's Vision: Necessity or Non-Issue?

    Kemp, Andrew; Hardy, Samuel; Harris, Paulette

    2014-01-01

    Public school teachers and administrators share a common belief with regard to the principal's articulation of his school's vision. This fact was borne from a survey conducted in Georgia involving 4,700 teachers and other school professionals. The responses of teachers and principals to questions regarding school vision were markedly consistent…

  6. Primary School Principals' Job Satisfaction and Occupational Stress

    Darmody, Merike; Smyth, Emer

    2016-01-01

    Purpose: The purpose of this paper is to explore the factors associated with occupational stress and job satisfaction among Irish primary school principals. A principal's job has become increasingly demanding and complex in recent decades. However, there is little current research into their levels of stress and job satisfaction, particularly…

  7. Principals' Opinions of Organisational Justice in Elementary Schools in Turkey

    Aydin, Inayet; Karaman-Kepenekci, Yasemin

    2008-01-01

    Purpose--This study aims to present the opinions of public elementary school principals in Turkey about the current organisational justice practices among teachers from the distributive, procedural, interactional, and rectificatory dimensions. Design/methodology/approach--The opinions of 11 public elementary school principals in Ankara about…

  8. 3D face recognition with asymptotic cones based principal curvatures

    Tang, Yinhang

    2015-05-01

    The classical curvatures of smooth surfaces (Gaussian, mean and principal curvatures) have been widely used in 3D face recognition (FR). However, facial surfaces resulting from 3D sensors are discrete meshes. In this paper, we present a general framework and define three principal curvatures on discrete surfaces for the purpose of 3D FR. These principal curvatures are derived from the construction of asymptotic cones associated to any Borel subset of the discrete surface. They describe the local geometry of the underlying mesh. First two of them correspond to the classical principal curvatures in the smooth case. We isolate the third principal curvature that carries out meaningful geometric shape information. The three principal curvatures in different Borel subsets scales give multi-scale local facial surface descriptors. We combine the proposed principal curvatures with the LNP-based facial descriptor and SRC for recognition. The identification and verification experiments demonstrate the practicability and accuracy of the third principal curvature and the fusion of multi-scale Borel subset descriptors on 3D face from FRGC v2.0.

  9. Perceptions of Leadership Behaviors by Female Principals in North Carolina

    McFadden, Cheryl; Maahs-Fladung, Cathy; Beck-Frazier, Susan; Bruckner, Kermit

    2009-01-01

    This study was designed to investigate whether significant differences exist among the perceptions of leadership behaviors of female principals in North Carolina using Bolman and Deal's (1984) four frames (structural, human resource, political, and symbolic) for analysis. Participants consisted of 1,245 female principals from elementary,middle,…

  10. The Fragility of Trust in the World of School Principals

    Walker, Keith; Kutsyuruba, Benjamin; Noonan, Brian

    2011-01-01

    Purpose: The purpose of this paper is to examine the trust-related aspect of the work of school principals. The authors' exploratory examination of the Canadian school principals' perceptions of their moral agency and trust-brokering roles described their establishing, maintaining, and recovering of trust in schools. This article is delimited to…

  11. Relationship between Personality Traits and Performance among School Principals

    Ali, Siadat Sayyed; Azizollah, Arbabisarjou; Zaman, Azhdari; Zahra, Amiri; Mohtaram, Abooeimehrizi

    2011-01-01

    This research seeks to explore the relationship between personality traits and performance among school principals. The main objective of this research is to analyze the relationship between principals' personality traits such as introversion, extroversion neuroticism and emotional stability between several performance dimensions. A descriptive…

  12. Principals' Evidence-Based Practice--Findings from German Schools

    Demski, Denise; Racherbäumer, Kathrin

    2015-01-01

    Purpose: In Germany, principals' working environments are data-rich for school improvement purposes in a rather low-stakes test-regime. An effective use of externally as well as internally generated data, also known as data wise leadership, is considered to be a key competence of successful principals. The purpose of this paper is to describe data…

  13. The Forgotten Aspect of Communication: Principals' Listening Skills

    Woods, Jerry; Shoho, Alan R.

    2009-01-01

    This study investigated principals' self-perceptions and teachers' perceptions of principals' listening skills. An instrument measuring perception of listening skills was developed on the basis of four listening factors: attending, empathy, response, and trustworthiness. Factor analysis confirmed the structure of the new listening instrument, and…

  14. The Development of Faith Leadership in Novice Principals

    Rieckhoff, Barbara Stacy

    2014-01-01

    This article describes the Catholic School Principal Support Program (CSPSP), a mentoring program for first and second-year Catholic school principals in a large urban diocese, and identifies key challenges, impacts and influences on decision-making. Ten school leaders describe their work and provide the lens by which they reflect on their role as…

  15. Instructional Leadership Potential among School Principals in Pakistan

    Niqab, Muhammad; Sharma, Sailesh; Wei, Leong Mei; Maulod, Shafinaz Bt A.

    2014-01-01

    This study highlights the pivotal role of the school principal in relation to organizational commitment and expected student outcomes in schools in Pakistan. By critically examining the available literature, and by evaluating relevant data, this study will draw attention to how successful principals manage their schools, by providing an…

  16. How Mentor Principals Interpret the Mentoring Process Using Metaphors

    Schechter, Chen; Firuz, Florit

    2015-01-01

    The study focused on how principal mentors perceived the mentoring process by means of the metaphors they used to represent it. Semi-structured in-depth interviews were conducted with 18 principal mentors. Findings were analysed qualitatively, generating themes as an inductive process, grounded in the various metaphors articulated by participants.…

  17. Are Principals Prepared To Manage Special Education Dilemmas?

    Patterson, Jean; Bowling, Denise; Marshall, Catherine

    2000-01-01

    Principals of site-based managed schools face numerous special-education program implementation challenges, such as appropriate committee compositions, inconsistent service delivery decisions across schools, interschool isolation, deflection of advocates, and policy guidance problems. Principals are ill-trained for inclusion and special-education…

  18. Professional Shock: The Enculturation of the Assistant Principal.

    Marshall, Catherine

    1985-01-01

    Presents field study research focused on (1) the socialization processes that the assistant principal undergoes as an aspiring administrator and (2) the processes that make an assistant principal effective and mobile within the organizational structure. Reports that roles and tasks are often poorly defined and that assessments of job performance…

  19. Honouring Roles: The Story of a Principal and a Student

    Jerome Cranston

    2012-11-01

    Full Text Available The importance of the teacher-student relationship in educational practice is well established, as is the idea of principal leadership in relationship to staff. Even though principal leadership is regarded as a factor in student success, the principal’s effect is usually assumed to take place via the teaching staff. There is an absence of research about the “lived experience” of direct principal-student relationships that shed lights on the ways in which these relationships play a role in student success and principal transformation. This paper presents two narratives written about a particular set of principal-student interactions experienced by the researcher (principal and participant (student.  The analysis uses a narrative inquiry approach to explore both the individual and collective meanings of this principal-student relationship. The stories and their derived meanings have the potential to enliven and  influence educational practice as they explore the subtleties of the principal-student relationship.

  20. Examining Teachers' Motivation Level According to School Principals' Humor Styles

    Recepoglu, Ergun; Kilinc, Ali Cagatay; Cepni, Osman

    2011-01-01

    The purpose of this research is to examine the motivation level of teachers according to school principals' humor styles. The humor styles survey and job motivation scale were used to gather data from 305 randomly selected teachers employed in primary schools in Karabuk. Results indicated that 141 of the teachers claimed school principal had…