Inferring Relative Ability from Winning Probability in Multientrant Contests

2021 ◽  
Vol 12 (1) ◽  
pp. 295-317
Author(s):  
Peter Cotton
Keyword(s):  
Winning Probability ◽  
Relative Ability

Investigating the Potential for Training Context Effects to Influence Forensic Document Examiners' Relative Skill at Writer Individualization and Exclusion

2015 ◽  
Vol 25 ◽  
pp. 27-35 ◽  
Author(s):  
Tonya Trubshoe ◽  
Bryan Found
Keyword(s):  
Context Effects ◽  
Test Results ◽  
Training Context ◽  
Training Set ◽  
Blind Trial ◽  
Relative Ability ◽  
Trial Test ◽  
Case Files ◽  
Document Examiners

The relative ability of forensic document examiners (FDEs) to provide support for the proposition of individualization or exclusion on the basis of handwriting features was investigated by surveying opinions expressed in case files by one laboratory’s FDEs and comparing this data to blind trial test results taken over a five year period. The survey of FDEs opinions on reports showed that opinions were skewed towards support for writer individualization over writer exclusion 92% of the time. Since historically FDEs develop their skills with respect to individualization/exclusion primarily on case files, it is proposed that this unbalanced training context may skew their abilities to carry out the tasks. To determine one laboratory’s capacity to correctly provide both individualization and exclusion evidence, results of blind validation trials were analyzed. For natural writing written and not written by the specimen writer, FDEs were 62 times more inconclusive when providing support for exclusion of the specimen writer when the specimen writer did not author the questioned sample, than they were for providing support for individualization when the specimen writer wrote the questioned sample. An intriguing possibility is that because of the unbalanced training set, government FDEs may acquire skills which are skewed towards individualization over exclusion.   Purchase Article - $10

Inducing Amusement in the Laboratory and Its Moderation by Experiential Approach

2021 ◽  
pp. 003329412110079
Author(s):  
Danette Abernathy ◽  
Robert D. Zettle
Keyword(s):  
Emotion Regulation ◽  
College Student ◽  
Negative Affect ◽  
Regression Models ◽  
Positive Emotion ◽  
Positive Emotions ◽  
Negative Mood ◽  
Relative Ability ◽  
Experiential Approach ◽  
Dispositional Differences

The relative ability of four comedic sketches to induce amusement in the laboratory and its moderation by dispositional differences in experiential approach as a form of positive emotion regulation were investigated. College student participants reported significant and equivalent diminished levels of negative affect relative to baseline following each sketch, while the level of positive affect induced by The Office exceeded that elicited by two of the three other sketches as well as by a top-ranked French comedic film clip. Regression models indicated that the two subscales of the Experiential Approach Scale and their interaction accounted for significant variability in negative mood reductions following the sketches. Unexpectedly, college student participants who enjoyed the greatest decrement in negative affect reported a regulation style in which anxiously clinging to positive emotions dominates over sustaining and savoring them. The limitations of this project and implications of its findings for laboratory inductions of amusement, as well as further investigations of its possible moderation by experiential approach as form of positive emotion regulation are discussed.

An Evaluation of Volatility Forecasting Techniques

Metamorphosis ◽  
2005 ◽  
Vol 4 (2) ◽  
pp. 113-124
Author(s):  
Madhusudan Karmakar
Keyword(s):  
Stock Market ◽  
Market Volatility ◽  
Stock Market Volatility ◽  
Relative Ability ◽  
Conflicting Evidence ◽  
Competing Models ◽  
Relative Quality ◽  
Indian Data ◽  
Naive Model

The existing literature contains conflicting evidence regarding the relative quality of stock market volatility forecasts. This paper employs daily Indian data to examine the relative ability of various models to forecast monthly stock market volatility. The forecasting models which were selected range from naive model to relatively complex GARCH model. While it is difficult to claim superiority of any one model under all measures used to assess the accuracy of the forecast, the overall results clearly identify two competing models i.e., the RWM and GARCH (1, 1).

scholarly journals The fate of fetal and adult B-cell progenitors grafted into immunodeficient CBA/N mice.

1979 ◽  
Vol 150 (3) ◽  
pp. 548-563 ◽  
Author(s):  
C J Paige ◽  
P W Kincade ◽  
M A Moore ◽  
G Lee
Keyword(s):  
B Cells ◽  
B Cell ◽  
Fetal Liver ◽  
Cell Cloning ◽  
Generate Functional ◽  
Self Renewal ◽  
Relative Ability ◽  
Cloning Assay ◽  
Regenerative Ability

The relative ability of various precursors to generate functional B cells in vivo was assessed by transferring normal, chromosomally-marked CBA/H-T6T6 cells to irradiated or unirradiated immunodeficient CBA/N mice. Emergence of donor-derived B cells was monitored by means of a B-cell cloning assay (in which CBA/N cells are inactive), and by karyotpic analysis of lymphoid, myeloid, and stem cell metaphases. Grafts of lymph node, spleen, anti-mu surface immunoglobin suppressed bone marrow, sIg+ cell-depleted marrow, normal marrow, fetal liver, and yolk sac suggest: (a) there is little self-renewal of sIg+ B cells in these models; (b) pre-committed cells have extensive proliferative/differentiative potential and at least initially contribute most of the newly-formed B cells; (c) populations or pre-B cells obtained from various sources differ in their regenerative ability; (d) CBA/N mice are deficient in a category of pre-B cells which are found in fetal liver; and (e) selective B-cell chimerism results from grafting of unirradiated CBA/N mice.

THE TRANSMISSION OF POLAR EFFECTS: IV. THE KINETICS OF ESTERIFICATION WITH DIAZODIPHENYLMETHANE OF SUBSTITUTED HETEROCYCLIC CARBOXYLIC ACIDS

1966 ◽  
Vol 44 (13) ◽  
pp. 1493-1499 ◽  
Author(s):  
Keith Bowden ◽  
D. C. Parkin
Keyword(s):  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
Rate Coefficients ◽  
Relative Ability ◽  
Indole Carboxylic Acid ◽  
Kinetics Of ◽  
Electron Effects

The rate coefficients for the reaction with diazodiphenylmethane, in ethanol at 30.0°, of a number of substituted indole-2-carboxylic acids, indole-3-carboxylic acids, coumarin-3-carboxylic acids, coumarilic acids, and N-phenylglycines have been determined. The effect of substitution is assessed by use of adapted Hammett and Dewar–Grisdale relations. The relations give good correlations for oxygen-ring heterocyclic systems, and the relative ability of the systems to transmit π-electron effects has been determined. An anomalous perturbing effect appears to operate in the indole-carboxylic acid systems.

scholarly journals Technical and Tactical Diagnosis Model of Table Tennis Matches Based on BP Neural Network

2021 ◽  
Author(s):  
Wenwen Huang ◽  
Miaomiao Lu ◽  
Yuxuan Zeng ◽  
Mengyue Hu ◽  
Yi Xiao
Keyword(s):  
Neural Network ◽  
High Precision ◽  
Network Model ◽  
Neural Network Model ◽  
Bp Neural Network ◽  
Diagnostic Model ◽  
Table Tennis ◽  
Winning Probability ◽  
Highly Efficient ◽  
Diagnosis Model

Abstract Background: The technical and tactical diagnosis of table tennis is extremely important for the preparation of matches, and there is a nonlinear relationship between athletes’ performance and their sports quality. As the neural network model has high nonlinear dynamic processing ability and has high fitting accuracy, the main purpose of this study was to establish a technical and tactical diagnosis model of table tennis matches based on a neural network to diagnose the influence of athletes’ techniques and tactics on the competition result. Methods: A three-layer back propagation neural network model for table tennis match diagnosis were established. The 30 technical and tactical analysis indexes that are closely related to winning a competition were selected based on the double three-phase evaluation method. And 100 table tennis matches were selected as data sample, of which 70 matches were taken as training sample to establish the diagnostic model, the other 30 matches were used to test the validity of the diagnostic model.Results: The technical and tactical diagnosis model of table tennis matches based on BP neural network had a high precision up to 99.997% and highly efficient in fitting (R2 = 0.99). It had a good ability to diagnose the technical and tactical abilities of table tennis players. The technical and tactical diagnosis results showed that the scoring rate of the fourth stroke of Harimoto had the greatest influence on the winning probability.Conclusion: The technical and tactical diagnosis model of table tennis matches based on BP neural network had a high precision and highly efficient in fitting. By using this model, the weights of the influence of athletes’ technical and tactical indexes on the winning probability of the competition can be calculated, which provides a valuable reference for formulating targeted training plans for players.

scholarly journals Interaction of rat glutathione S-transferases 7-7 and 8-8 with γ-glutamyl- or glycyl-modified glutathione analogues

1989 ◽  
Vol 264 (3) ◽  
pp. 759-764 ◽  
Author(s):  
A E P Adang ◽  
D J Meyer ◽  
J Brussee ◽  
A Van der Gen ◽  
B Ketterer ◽  
...  
Keyword(s):  
Active Sites ◽  
Ethacrynic Acid ◽  
Acceptor Substrate ◽  
Gamma Glutamyl ◽  
Relative Ability ◽  
Glutathione S Transferases ◽  
Better Than

Analogues of GSH in which either the gamma-glutamyl or the glycyl moiety is modified were synthesized and tested as both substrates for and inhibitors of glutathione S-transferases (GSTs) 7-7 and 8-8. Acceptor substrates for GST 7-7 were 1-chloro-2,4-dinitrobenzene (CDNB) and ethacrynic acid (ETA) and for GST 8-8 CDNB, ETA and 4-hydroxynon-trans-2-enal (HNE). The relative ability of each combination of enzyme and GSH analogue to catalyse the conjugation of all acceptor substrates was similar with the exception of the combination of GST 7-7 and gamma-L-Glu-L-Cys-L-Asp, which used CDNB but not ETA as acceptor substrate. In general, GST 7-7 was better than GST 8-8 in utilizing these analogues as substrates, and glycyl analogues were better than gamma-glutamyl analogues as both substrates and inhibitors. These results are compared with those obtained earlier with GSH analogues and GST isoenzymes 1-1, 2-2, 3-3 and 4-4 [Adang, Brussee, Meyer, Coles, Ketterer, van der Gen & Mulder (1988) Biochem. J. 255, 721-724] and the implications with respect to the nature of their active sites are discussed.

scholarly journals Balance Tests in Pre-Adolescent Children: Retest Reliability, Construct Validity, and Relative Ability

2020 ◽  
Vol 17 (15) ◽  
pp. 5474
Author(s):  
Vedrana Sember ◽  
Janja Grošelj ◽  
Maja Pajek
Keyword(s):  
Construct Validity ◽  
Mean Amplitude ◽  
Body Sway ◽  
Mean Velocity ◽  
Eyes Closed ◽  
Relative Ability ◽  
Balance Tests ◽  
Balance Ability ◽  
The Mean ◽  
The Impact

Balance is an essential prerequisite for the normal physical development of a child. It consists of the ability to maintain the body’s centre of mass over its base of support, which is enabled by automatic postural adjustments, and maintain posture and stability in various conditions and activities. The present study aimed to determine the measurement characteristics (reliability and concurrent validity) and the relative ability of balance tests and different motor tests in healthy 11-year-olds. We also evaluated the impact of vision on balance ability. Our results showed high interrater reliability (from 0.810 to 0.910) and confirmed the construct validity of the included balance tests. Girls performed significantly better than boys in laboratory tandem stance in following balance components: total sway path with eyes open (BSEO) (t = 2.68, p = 0.01, effect size (ES) = 0.81), total body sway with eyes closed of centre of pressure (CoP) displacement in the a-p direction (BSEC) (t = 1.86, p = 0.07, ES = 0.57), mean velocity of CoP displacements (VEO) (t = 2.67, p = 0.01, ES = 0.83), mean amplitude of CoP displacements in the a-p direction (AapEO) (t = 3.38. p = 0.00, ES = 1.01) and in mean amplitude of CoP displacements in the m-l direction (AmlEO) (t = 3.68, p = 0.00, ES = 1.19). With eyes closed, girls performed significantly better (t = 2.28, p = 0.03, ES = 0.70) than boys did in the mean amplitude of COP displacements in the a-p direction (AapEO) and significantly better (t = 2.37, p = 0.03, ES = 0.71) in the mean amplitude of COP displacements in the m-l direction (AmlEC). Insignificant correlations between different balance tests, except for a correlation between the flamingo test and one-leg stance on a low beam (r = 0.558, p < 0.01), show that each test assesses different aspects of balance ability; therefore, balance cannot be assessed with a single test.

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