Academic literature on the topic 'Scree plot'
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Journal articles on the topic "Scree plot"
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Macrosson, W. D. K. "Scree Plots, Data Structure, and Random Variance." Psychological Reports 84, no. 2 (1999): 533–40. http://dx.doi.org/10.2466/pr0.1999.84.2.533.
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Data sets of known and predetermined structure (plasmodes) were created by the Monte Carlo method and subjected to exploratory factor analysis; the scree plots for each plasmode were then drawn. Since the aim of the paper is to give a graphic portrayal of the effects of orthogonality and random variance upon the scree plot, appropriate data sets were selected to illustrate these effects. A progression of scree plots is shown wherein it may be clearly seen how an increase in both nonorthogonality and random variance leads to the suppression of the factor structure in the data. Although this is a well known phenomenon, the visualization highlights the limitations of Kaiser's Eigenvalue > 1 rule and the scree test; it also illustrates the robustness of the factor analytic technique.
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Raîche, Gilles, Theodore A. Walls, David Magis, Martin Riopel, and Jean-Guy Blais. "Non-Graphical Solutions for Cattell’s Scree Test." Methodology 9, no. 1 (2013): 23–29. http://dx.doi.org/10.1027/1614-2241/a000051.
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Most of the strategies that have been proposed to determine the number of components that account for the most variation in a principal components analysis of a correlation matrix rely on the analysis of the eigenvalues and on numerical solutions. The Cattell’s scree test is a graphical strategy with a nonnumerical solution to determine the number of components to retain. Like Kaiser’s rule, this test is one of the most frequently used strategies for determining the number of components to retain. However, the graphical nature of the scree test does not definitively establish the number of components to retain. To circumvent this issue, some numerical solutions are proposed, one in the spirit of Cattell’s work and dealing with the scree part of the eigenvalues plot, and one focusing on the elbow part of this plot. A simulation study compares the efficiency of these solutions to those of other previously proposed methods. Extensions to factor analysis are possible and may be particularly useful with many low-dimensional components.
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B. Maria, Uduma, M. M. Abubakar, and S. I. Muhammed. "WATER QUALITY PARAMETERS FOR POLLUTION SOURCE IDENTIFICATION IN WARWADE DAM WATER, DUTSE, JIGAWA STATE, NIGERIA: STATISTICAL AND SPATIOTEMPORAL EVALUATION." FUDMA JOURNAL OF SCIENCES 6, no. 3 (2022): 15–35. http://dx.doi.org/10.33003/fjs-2022-0603-967.
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This study looked at the diminishing water quality of Warwade Dam, which is one of Dutse's largest dams. Statistical methodologies such as descriptive statistics, principal component analysis (PCA), regression analysis, correlation analysis, and cluster analysis were used to examine selected water quality characteristics. pH, conductivity, TDS, temperature, and DO captured the highest variability (98.94%) in the data set, according to the PCA scree plot. Ca and Mg were the most variable from the PCA scree plot among the metals studied (99.96 percent). The correlational analysis revealed that the characteristics differed in terms of spatio-temporal and/or limnological aspects. Variables within a cluster are relatively similar, whereas variables outside a cluster are very dissimilar, according to cluster analysis employing hierarchical dendrogram to establish linkages, relationships, and differences among parameters. The validation test was passed by 67 percent of the parameters in the general linear regression model (very strong fit at P value 0.05). The PCA scree plot of 99.39 percent variability revealed that the dam concentrations of nitrate, nitrite, and chloride were identical
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Streiner, David L. "Factors Affecting Reliability of Interpretations of Scree Plots." Psychological Reports 83, no. 2 (1998): 687–94. http://dx.doi.org/10.2466/pr0.1998.83.2.687.
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The purpose of this study was to examine factors which may affect the reliability of interpreting scree plots. Six experienced and 11 novice raters were each given 10 scree plots; 5 were taken from Cattell and Vogelmann's (1977) paper and reflected artificial data, and 5 were from real data sets. Plots were drawn to simulate computer output. Novices were slightly more reliable than experts; and both were more reliable with artificial data (intraclass correlations of .33 and .33, respectively) than with real data (intraclass correlations of .05 and .00). Eliminating the single Cattell and Vogelmann plot which had error built in resulted in higher reliabilities (.42 and .36). Thus, the reliability of interpreting plots appears poor under conditions which approximate how they are usually read: data which contain error and are plotted on graphs which have a varying ratio of X- to Y-axis scales.
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Zhu, Mu, and Ali Ghodsi. "Automatic dimensionality selection from the scree plot via the use of profile likelihood." Computational Statistics & Data Analysis 51, no. 2 (2006): 918–30. http://dx.doi.org/10.1016/j.csda.2005.09.010.
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Al-Baraa, Akram. "Metabolomic Methods to Predict Cancer-Associated Skeletal Muscle Wasting from Profi les of Urinary Metabolites." J Biomed Res Environ Sci 4, no. 3 (2023): 331–37. https://doi.org/10.37871/jbres1680.
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It is known that cachexia is a cancer-associated muscle wasting and reduction in the function status due to treatment especially chemotherapy and in life expectancy, to assess cachexia muscle loss there are many methods as Computed Tomography (CT) scan which has many disadvantages as high cost, invasive, time consuming and cannot detect early stages of muscle wasting [1]. This novel approach uses single-time point urinary metabolite profiles for determining whether the patient is subjected to muscle wasting by analysis of 93 random urine samples from patients with cancer using 2 successive CT images by assessing of lumbar skeletal muscle area by cubic centimeter to estimate the rate of muscle change per time for every patient. The average muscle change over time was -4.71% in 100 days in the muscle-losing group and 3.91% in 100 days in the control group. Bivariate statistics identified metabolites to muscle wasting including constituents and metabolites of muscle as creatine and creatinine, amino acids as serine, threonine, glutamic acid, isoleucine and valine. These results suggest that urine analysis of a single random urine sample is cheap, fast, and non-invasive tool to screen muscle loss and it is useful to clarify prediction of related metabolic conditions possible with methodology presented. The metabolomics methods used in this article are Univariate analysis T-test, correlation analysis, principal component analysis and heatmap clustering.
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Abdollahimohammad, Abdolghani, and Rogayah Ja’afar. "Learning Style Scales: a valid and reliable questionnaire." Journal of Educational Evaluation for Health Professions 11 (August 18, 2014): 22. http://dx.doi.org/10.3352/jeehp.2014.11.22.
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Purpose: Learning-style instruments assist students in developing their own learning strategies and outcomes, in eliminating learning barriers, and in acknowledging peer diversity. Only a few psychometrically validated learning-style instruments are available. This study aimed to develop a valid and reliable learning-style instrument for nursing students. Methods: A cross-sectional survey study was conducted in two nursing schools in two countries. A purposive sample of 156 undergraduate nursing students participated in the study. Face and content validity was obtained from an expert panel. The LSS construct was established using principal axis factoring (PAF) with oblimin rotation, a scree plot test, and parallel analysis (PA). The reliability of LSS was tested using Cronbach’s α, corrected item-total correlation, and test-retest. Results: Factor analysis revealed five components, confirmed by PA and a relatively clear curve on the scree plot. Component strength and interpretability were also confirmed. The factors were labeled as perceptive, solitary, analytic, competitive, and imaginative learning styles. Cronbach’s α was > 0.70 for all subscales in both study populations. The corrected item-total correlations were > 0.30 for the items in each component. Conclusion: The LSS is a valid and reliable inventory for evaluating learning style preferences in nursing students in various multicultural environments.
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Rogers, Kimberly Cervello, Robert Petrulis, Sean P. Yee, and Jessica Deshler. "Mathematics Graduate Student Instructor Observation Protocol (GSIOP): Development and Validation Study." International Journal of Research in Undergraduate Mathematics Education 6, no. 2 (2019): 186–212. http://dx.doi.org/10.1007/s40753-019-00106-4.
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AbstractThis paper presents the development and validation of the 17-item mathematics Graduate Student Instructor Observation Protocol (GSIOP) at two universities. The development of this instrument attended to some unique needs of novice undergraduate mathematics instructors while building on an existing instrument that focused on classroom interactions particularly relevant for students’ development of conceptual understanding, called the Mathematical Classroom Observation Protocol for Practices (MCOP2). Instrument validation involved content input from mathematics education researchers and upper-level mathematics graduate student instructors at two universities, internal consistency analysis, interrater reliability analysis, and structure analyses via scree plot analysis and exploratory factor analysis. A Cronbach-Alpha level of 0.868 illustrated a viable level for internal consistency. Crosstabulation and correlations illustrate high level of interrater reliability for all but one item, and high levels across all subsections. Collaborating a scree plot with the exploratory factor analysis illustrated three critical groupings aligning with the factors from the MCOP2 (student engagement and teacher facilitation) while adding a third factor, lesson design practices. Taken collectively, these results indicate that the GSIOP measures the degree to which instructors’ and students’ actions in undergraduate mathematics classrooms align with practices recommended by the Mathematical Association of America (MAA) using a three-factor structure of teacher facilitation, student engagement, and design practices.
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Zelová, Katarína, and Ludmila Fridrichová. "How We Can Use Multivariate Statistical Analysis to Predict Creasing of Fabrics." Applied Mechanics and Materials 543-547 (March 2014): 1930–33. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.1930.
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The creasing of textiles was evaluated by means of the innovative method of measuring the angle of recovery. Our aim is to find statistically significant features contributing to the determination of creasing materials. For this purpose, to identify the inner structures of data, the method of PCA analysis was used a method with latent variables. By means of PCA analysis (method of principal components) the original nine characteristics can be reduced to two latent variables, i.e. principal components. The structure and links among the examined features are characterized by methods like: Scree Plot, Score and component loading, Scatrerplot and Dendrogram.
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Pires, Pedro P., Ana Carolina Monnerat Fioravanti Bastos, Érica de Lana Meirelles, Júlia Mulinari Peixoto, Natacha de Barros Candido, and Leonardo de Barros Mose. "Factorial Structure of the Frugality Scale: Exploratory Evidence." Psico-USF 24, no. 1 (2019): 1–9. http://dx.doi.org/10.1590/1413-82712019240101.
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Abstract This article aims to promote an investigation of the psychometric properties of Frugality Scale adapted to Brazilian Portuguese. Frugality is characterized by using and consuming goods in a resourceful way, fully exploring its durability as well. To this end, 626 people responded to an online form that contained the frugality scale. Procedures such as non-graphical solutions to the scree plot, exploratory graphical analysis and a Schmid-Leiman factor solution point to evidence that the scale’s structure is not one-dimensional but two-dimensional. Finally, modeling strategies also indicate that a bifactor solution can be applied.
Dissertations / Theses on the topic "Scree plot"
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Zhiyu, Chang, Paul Nguyen, and Erik Manestam. "Product Placement In Games : A quantitative study of how product placement in games affect on consumers' attitude towardthe brand." Thesis, Linnéuniversitetet, Institutionen för marknadsföring (MF), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-85603.
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The purpose of this research paper was to explain how product placement in games influences the consumer’s attitude towards the brand. The aims during this work with the purpose in mind were to utilize quantitative methods in the pursuit of fulfilling the objective of answering how certain placement strategies can affect individual consumer’s attitudes. As said, quantitative methods are used in combination with deductive reasoning, hence meaning that researchers of this paper make use of such programs like google docs questionnaire (for collecting data and creating surveys), SPSS statistics (for measuring the given data and assembling patterns/relationships). Since these kinds of methods were used, it means that both primary and secondary sources were made use of by the authors. Findings concerning the research put forward in this paper indicates that the most significant kind of placement strategy which is motivated why its significance value, is Plot and narrative placement. research presented in this work is represented by three hypotheses. H1-screen placement, H2 -script placement and H3 plot placement. All hypothesis except the third one was accepted through 2 produced positive results (H2, H3) while one produced negative results (H1). As a wrap-up summary of this, consumers who play games seem to have a more positive attitude towards brands utilizing screen and plot placement rather than script placement. Hence having a better attitude when it comes to product placement in games compared from the previous studies. Researchers suggest using qualitative research to cover for more factors concerning product placement in games which may affect consumers'' attitude toward brands. This together with a further focus on random sampling may produce an interesting result.
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Ebel, Christine. "Etude des cristaux liquides smectiques C chiraux en vue de la réalisation d'écrans plats." Grenoble 1, 1988. http://www.theses.fr/1988GRE10076.
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Les cristaux liquides smectiques c ferroelectriques ont ete etudies en vue de leur application pour la realisation d'ecrans plats. Dans ce but un melange smectique c chiral a temperature ambiante a ete formule et des cristaux liquides a forte polarisation spontanee, synthetises. Des observations ont ete faites quant a l'organisation du cristal liquide a proximite des surfaces et au comportement electrooptiquedes melanges smectiques c chiraux. On observe aussi deux familles de materiaux quant a leur memorisation. Des prototypes d'ecrans plats ont ete realises
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Constancias, Christophe. "Emission d'électrons par effet de champ à partir de micropointes pour écrans plats : simulations, caractérisations et confrontations expérimentales." Université Joseph Fourier (Grenoble ; 1971-2015), 1998. http://www.theses.fr/1998GRE10002.
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Les feds (field emission displays) utilisent des millions de microcanons a electrons : les micropointes. L'uniformite et la stabilite de ces micropointes sont des qualites indispensables pour la fabrication optimisee des emetteurs et la performance des feds. L'objectif de cette etude est d'evaluer precisement les proprietes emissives de cathodes a micropointes fabriquees pour les ecrans plats. Il s'agit de correler les modeles developpes a partir de la simulation de micropointes avec les caracteristiques experimentales observees sur ces memes micropointes. Le travail est scinde en trois parties que nous avons comparees entre elles, afin d'obtenir la correlation globale des resultats de cette etude. Pour commencer, nous avons etudie et simule l'emission du courant de monopointes (en fonction de differents parametres geometriques) par la modelisation du parametre de champ , decrivant la finesse d'une pointe. Nous avons montre qu'un modele proche de la realite geometrique des pointes, (ne comportant qu'un seul site emetteur), permet d'evaluer l'influence des parametres geometriques et valide les resultats experimentaux obtenus pour la plupart des monopointes : voir courbes courant tension i(v). Dans un deuxieme temps, nous avons caracterise les proprietes emissives de monopointes, par des observations en microscopie a force atomique (afm), l'analyse des courbes i(v), et la mesure des spots produits par les faisceaux d'electrons ainsi que leurs angles d'ouvertures. Dans le cas de pointes particulierement emissives, nos resultats experimentaux (confrontes aux simulations) montrent que la structure nanometrique, des sites emetteurs, confere aux pointes des proprietes remarquables et que l'emission se distingue d'une emission fowler-nordheim pure. Enfin, la troisieme partie de cette these est consacree a l'evaluation des proprietes statistiques de l'emission de cathodes (avec une densite de pointes de plusieurs 10#4 ptes/mm#2) dont la structure est identique a celle des feds. Ainsi, nous avons mis au point un montage experimental appele projecteur a lentilles electrostatiques, pour comptabiliser directement le nombre d'emetteurs actifs d'une cathode en fonction du potentiel applique entre la grille d'extraction et les pointes, de l'environnement (gaz), de differents traitements ou du temps. Les resultats obtenus avec cet instrument montrent que plus de 50% des micropointes sont actives et que la deviation de l'emissivite est largement imputable aux dispersions geometriques des emetteurs. Un modele d'analyse statistique semi-empirique a ete developpe pour correler ces resultats experimentaux avec les simulations et les observations afm de la dispersion des parametres geometriques des pointes. Mots cles : emission par effet de champ, cathodes a micropointes, simulations de micropointes, optique electrostatique, instrumentation, feds (field emission displays), mesures topographiques afm
Books on the topic "Scree plot"
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Terrace, Vincent. Experimental television, test films, pilots, and trial series, 1925 through 1995: Seven decades of small screen almosts. McFarland, 2009.
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Lathrop, William Addison. Little Stories From The Screen. Kessinger Publishing, LLC, 2007.
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Lathrop, William Addison. Little Stories From The Screen. Kessinger Publishing, LLC, 2007.
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Moran, W. Reed. Why Plot Never Matters: Telling the Screen Stories in Your Heart. Kendall Hunt Publishing Company, 2015.
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Moran, W. Reed. Why Plot Never Matters: Telling the Screen Stories in Your Heart. Kendall Hunt Publishing Company, 2015.
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Moran, W. Reed. Why Plot Never Matters: Telling the Screen Stories in Your Heart - EBook. Kendall Hunt Publishing Company, 2015.
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Altschuler, Bruce E. Seeing through the Screen. The Rowman & Littlefield Publishing Group, 2017. https://doi.org/10.5040/9781978730939.
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Although films affect and reflect the way Americans look at politics, they have received far less attention than television or newspapers. This is changing, particularly on college campuses, where courses on politics and film are growing in popularity. This book consists of short essays on approximately fifty American political films. It is distinctive in two ways. Firstly, it defines politics broadly enough to include a range of films, not only on obviously political topics such as the presidency, congress, and elections, but also on the media, law and courts, war and peace, and a variety of policy issues. Secondly, it goes beyond plot and dialogue to discuss the language of film, including visual aspects, sound, mise-en-scène, and other ways that films communicate their messages to audiences. Each chapter begins with a brief introduction to the films included. The essays also explain the political context of each film and, when films are based on historical events, discuss the accuracy of their depictions. References to additional sources are included at the end of each essay. This book explores the extent to which films take on the political issues of the day and their influence on public perceptions of politics. Do films support the status quo or do they challenge it?
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Khoo, Gaik Cheng, Thomas Barker, and Mary Ainslie. Southeast Asia on Screen: From Independence to Financial Crisis. Amsterdam University Press, 2020.
Find full textBook chapters on the topic "Scree plot"
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Cook, Martie. "Plot-Driven Drama." In Write to TV Out of Your Head and Onto the Screen. Routledge, 2020. http://dx.doi.org/10.4324/9780429322068-14.
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Pak, Kamilla. "Chapter 9. (Im)politeness and plot advancement in screen translation." In Pragmatics and Translation. John Benjamins Publishing Company, 2023. http://dx.doi.org/10.1075/pbns.337.09pak.
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This contribution explores the workings of linguistic (im)politeness in plot advancement in the context of audiovisual translation with a focus on English-Korean film subtitling, which represents a transfer between considerably remote linguacultures that rely on very different pragmalinguistic means of expressing interpersonal meanings. Challenges of interlingual subtitling are associated with cultural asynchrony both between the source and target cultures and between the verbal component recreated in a different language and the original semiotic system. The discussion is based on examples from relatively recent mainstream fiction films that demonstrate some of the solutions deployed by screen translators in order to capture and re- or co-create the interpersonal effects of the original that have direct bearing on the general plot development.
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Lutenegger, Alan J. "Plate Load Test (PLT) and Screw Plate Load Test (SPLT)." In In Situ Testing Methods in Geotechnical Engineering. CRC Press, 2021. http://dx.doi.org/10.1201/9781003002017-9.
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Sibilska-Mroziewicz, Anna, Ayesha Hameed, Jakub Możaryn, and Andrzej Ordys. "Virtual Reality Simulations of the Snake Robot." In Digital Interaction and Machine Intelligence. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-37649-8_31.
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AbstractThe following paper introduces a new way of presenting the results of engineering simulations. The object of consideration is the motion of the snake robot on a flat surface. The robot’s trajectory and control signals are calculated in MATLAB. Different approaches have been presented to show how the robot moves - from 2D plots and 3D animations observed from a computer screen to realistic visualisations displayed in the Virtual Reality headset. The proposed VR simulation will allow watching the simulation results and manipulating simulation parameters from inside of VR.
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Ivory, Yvonne. "Prussian Discipline and Lesbian Vulnerability: Christa Winsloe’s Children in Uniform at the Gate." In Cultural Convergence. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57562-5_8.
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Abstract This chapter examines the Dublin production and critical reception of Christa Winsloe’s Children in Uniform, which ran to full houses at the Gate for three weeks in April 1934. The play, which deals with the love between a Prussian schoolgirl and her female teacher, had premiered in Leipzig (1930), run successfully in Berlin (1931), and been adapted for the screen as Mädchen in Uniform (1931) before it was translated into English for a successful London run in 1932-1933. Edwards and mac Liammóir probably saw the original German play in Berlin in 1931. Using the prompt copy, lighting plots, photographs and reviews, the chapter shows how Edwards used expressionistic lighting and sonic leitmotifs to underscore the authoritarian regime within which the relationship between the women develops. In following the Berlin staging, Edwards produced a more subversive version of the play than that seen by London audiences or cinema goers.
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"Appendix F. Correlation and scree plot." In Studies in Corpus Linguistics. John Benjamins Publishing Company, 2024. https://doi.org/10.1075/scl.117.app6.
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"AN UNTHINKABLE PLOT?" In Slave Revolt on Screen. University Press of Mississippi, 2021. http://dx.doi.org/10.2307/j.ctv1s5nwzx.4.
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Sepinwall, Alyssa Goldstein. "An Unthinkable Plot?" In Slave Revolt on Screen. University Press of Mississippi, 2021. http://dx.doi.org/10.14325/mississippi/9781496833105.003.0002.
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This chapter treats the small number of feature films from the U.S., France and elsewhere in Europe related to the Haitian Revolution. They include Emperor Jones (1933), Burn! (1969; also called Quiemada), and Toussaint Louverture (2012). The chapter draws on Michel-Rolph Trouillot’s ideas about the Haitian Revolution’s being “unthinkable” to non-Haitians; it explains how the Revolution’s significance has often been minimized even when it is shown on screen. The chapter examines how these films, to different degrees, distort the history of the Revolution, thereby illustrating defects in how slavery is remembered in the U.S., France, and elsewhere. The chapter notes that the weaknesses of these films are especially unfortunate, given funding structures that enable U.S. and European directors to make films about the Revolution more easily than can Haitians themselves.
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"Story and Plot." In Writing for Stage and Screen. Methuen Drama, 2023. http://dx.doi.org/10.5040/9781350338302.ch-004.
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"Basics of Graphics With Applications." In Advances in Systems Analysis, Software Engineering, and High Performance Computing. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7078-4.ch004.
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The basic, special, and additional commands for generating two- and three-dimensional graphs are presented. It describes formatting commands for inserting labels, headings, texts, and symbols into a plot, as well as color, marker, and line qualifiers. Graphs with more than one curve and graphs with two Y axes are discussed. The possibilities of creating multiple plots on one page are shown. All the commands studied are presented with examples from the field of mechanics and tribology (M&T). At the end of the chapter, applications are given; they illustrate how to generate 2D and 3D graphs for engine piston velocity, power screw efficiency, engine oil viscosity, and a number of other M&T problems.
Conference papers on the topic "Scree plot"
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Castaneda, H., Lin Chen, Hui Wang, and Sreelakshmi Sreeharan. "Classification of Active and Passive Surface Conditions Based on Different Relaxation Response for External Corrosion Coated Pipelines." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-18052.
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Abstract The energy transportation network of the United States consists of over 2.5 million miles of buried pipelines. It is of prime importance the integrity of the metallic assets due to degradation in soil conditions because of their constant exposure to the aggressive, dynamic, and heterogeneous environment. This degradation process, involves a sequence of process starting with the coating damages/failures and the following electrochemical reactions. External corrosion can result in gradual and usually localized metal loss on the exterior surface of failure coating, resulting in reduction of the wall thickness of the metallic asset. Indirect technologies, such as DC basis have been able to detect and pinpoint two conditions in the pipeline, intact and holiday (active surface or coating anomaly) with good confidence. In this work we consider different levels of corrosion surface severity when a coating holiday (anomaly) exists. Different X52 metallic samples were characterized by using DC polarization and AC impedance to distinguish the differences in terms of capacitive and surface corrosion severity when the metallic samples get a coating failure. Two different coatings were used to characterize different activity surface conditions when there is a coating holiday. The performed set of laboratory experiments include the effects of the applied cathodic protection potential and the metallic surface condition in the presence of holidays (specifically active and passive state) under cathodic protection and simulated soil conditions. Functional correlations and plot results could be found with the fundamentals of electrochemistry and electrical signals by following the DC polarization, relaxation plots and Electrochemical Impedance Spectroscopy results performed in the laboratory. In light of the differences between each surface condition founded experimentally we are able to screen and distinguish the severity conditions of the surface under anomaly coating conditions and potential detection methods/tools for potential pipeline inspection practices.
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Silva, Renata, Daniel Oliveira, Davi Pereira Santos, Lucio F. D. Santos, Rodrigo Erthal Wilson, and Marcos Bedo. "Criteria for choosing the number of dimensions in a principal component analysis: An empirical assessment." In XXXV Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2020. http://dx.doi.org/10.5753/sbbd.2020.13632.
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Principal component analysis (PCA) is an efficient model for the optimization problem of finding d' axes of a subspace Rd' ⊆ Rd so that the mean squared distances from a given set R of points to the axes are minimal. Despite being steadily employed since 1901 in different scenarios, e.g., mechanics, PCA has become an important link in machine learning chained tasks, such as feature learning and AutoML designs. A frequent yet open issue that arises from supervised-based problems is how many PCA axes are required for the performance of machine learning constructs to be tuned. Accordingly, we investigate the behavior of six independent and uncoupled criteria for estimating the number of PCA axes, namely Scree-Plot %, Scree Plot Gap, Kaiser-Guttman, Broken-Stick, p-Score, and 2D. In total, we evaluate the performance of those approaches in 20 high dimensional datasets by using (i) four different classifiers, and (ii) a hypothesis test upon the reported F-Measures. Results indicate Broken-Stick and Scree-Plot % criteria consistently outperformed the competitors regarding supervised-based tasks, whereas estimators Kaiser-Guttman and Scree-Plot Gap delivered poor performances in the same scenarios.
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Konks, Eric, and Alexandr Shcherbakov. "PLOD: Point cloud level of detail for polygon mesh." In Computer Science Research Notes. University of West Bohemia, Czech Republic, 2024. http://dx.doi.org/10.24132/csrn.3401.14.
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Rendering high-polygonal models at large distances has certain performance issues related to high density of subpixel triangles, which can be solved by levels of detail, a classical optimization method. Since a mesh occupies a small area on the screen, an alternative representation of the geometry in the form of a point cloud can replace the original geometry with little or no change to the image, and allowing for significant performance improvements due to the smaller number of primitives rendered. This paper presents a method for automatically generating a point cloud from a polygonal mesh with nested levels of detail. It also considers a method for rendering cloud with dynamically varying cloud density in real time based on view frustum and distance.
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Cuttino, James F., Thomas A. Dow, and Byron F. Knight. "Nonlinearities in a Single Nut, Preloaded, Precision Ball Screw." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-1173.
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Abstract The nonlinear performance of a single-nut, preloaded ball screw actuator is analyzed in this paper. The study identifies the source of nonlinear torque in the ball screw and subsequently maps that torque into the nonlinear displacement response due to windup in the shaft. The study is complemented with an experimental verification using a small angle rotation fixture (ARC) to input very small amplitude angular displacements to the screw while measuring induced torque and displacements. The experimental results are obtained from a Precision Linear Optimization Testbed (PLOT) which was developed to study the ability of different actuator systems to provide long range motion with nanometer accuracy. The analysis is conducted for the case of no axial loading. The study shows that the nonlinearities in the ball screw originate in the rolling friction between the balls and the races which induces torque in the nut and subsequently windup in the shaft. It also shows that the torque can be deduced from a relationship of the torque between a ball spinning in a race.
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Games, Peter S., and Alark Joshi. "Visualization of off-screen data on tablets using context-providing bar graphs and scatter plots." In IS&T/SPIE Electronic Imaging, edited by Pak Chung Wong, David L. Kao, Ming C. Hao, and Chaomei Chen. SPIE, 2013. http://dx.doi.org/10.1117/12.2038456.
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Mocofan, Muguras daniel. "LEARNING BY GAMES; A STUDY CASE OF THE COFFE PROJECT IMPLEMENTATION IN ROMANIA." In eLSE 2016. Carol I National Defence University Publishing House, 2016. http://dx.doi.org/10.12753/2066-026x-16-077.
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Introduction COFFE project proposes the transferring and modernizing an on-line tool "Simulation enterprise", dedicated to vocational school students which enables users to run virtual enterprise producing mobile phones and manage it in an environment reflecting real economic conditions. The game is concentrated on developing entrepreneurial skills and encouraging users to run in the future own business. The main aims and objectives are: o increasing knowledge on enterprise functioning and enterprise management, o raising awareness in the field of contemporary economic conditions in Poland and other partner countries, o helping game users to develop entrepreneurship and use this knowledge for learning and developing competences from areas: entrepreneurship, mathematics, ICT and foreign languages, o raising awareness among key stakeholders in the field of key competences which are necessary to possess to get employed. The COFFE PROJECT COFFE project is a partnership of six organizations and institutions, which are: educational institution (University of Economics and Innovation, Poland and GEA College, Slovenia), non-governmental organization (OIC Poland), counseling services and career guidance (CPIP Romania), chambers of commerce (Cambra Tarrasa from Spain) and research centres (RCI, Cyprus). The consortium partners are familiar with issues connected with developing entrepreneurial attitudes as well as experienced in multilateral projects within LLP Programme as all of them participated previously in LLP, either as leading partner or as a partner organization/institution. The project will cause an increase of entrepreneurial attitudes amongst young people (mainly vocational school students) and other interested in development their entrepreneurial skills, increase their knowledge from macro-economy as well as popularize using modern training methods (e-learning and simulation games) which are recently becoming more attractive and effective. Learning by games "Business Simulation" game system is the Internet application simulating realities of the contemporary market within the business realm. Games take place in the virtual world and reflect the basic rules and dependencies existing in the business world. Players play a role of owners of companies producing mobile phones. Their task is to start and develop their companies in the reality of competition with other enterprises of similar profile and run by other players. Competing on this difficult market requires a skillful management of the company's potential and resorting to cooperation with trade partners. The object of the game's simulated market are mobile phones. Each one is characterized by two features: quality level and functionality level. In the game, time runs in a constant manner. Its flow is measured in units called steps. The bigger unit applied is a period, which is a multiple of steps of the game. Notions of periods and steps may be respectively identified with months and days in the real world. In the game there is no equivalent of a year. The world in which the game takes place has its geographical properties. It is all divided into locations, each of which is situated in a given country and has its geographical coordinates. At the start of the game, all the business entities which require their headquarters are automatically located on the map. These are players' companies, clients, suppliers, warehouses and transport companies. It means that each company receives an investment plot on some country's territory and therefore the access to trade partners existing in a particular country. In order to enter into partnership with foreign companies, a player's company will have to establish a branch in a neighboring country. The screen describing a given branch of a player's company, presents a kind of magnification of a singular part of the world map. It also includes a list of organizational units which have their headquarters in this location together with providing their basic parameters. Below, there is also a component showing values of factors describing a given branch, such as being assigned to a given country, its parameters on the world map, a quantity of building plots and its value. An empty, newly bought investment plot includes several free building plots. A player decides on ways of its exploitation. Particular building plots in this location will be taken over by buildings belonging to organizational units. With the moment of its purchase, one of building plots is automatically taken over by an administration building which represents a workplace on managerial staff and administration. Furthermore, a company branch screen has an option of changing its name. Results The paper presents the study case of the implementation of the COFFE project in Romania. We present aspects about: o the developing of the on-line simulation game, designed for specific purpose and target group o the impact of this tool which will reflect economical conditions to the students o the use of modern technologies to make the training process as attractive as possible o the promotion of the entrepreneurship, innovativeness and self-employment
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Yang, Chenbei. "THE CULTURAL CORE OF MODERN CHINA ON THE EXAMPLE OF THE SCREEN ADAPTATION OF THE LEGEND OF THE WHITE SNAKE." In 4th International Conference Modern Culture and Communication. Institute for Peace and Conflict Research, 2024. http://dx.doi.org/10.31312/978-5-6048848-7-4-03.
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The development of civilization entails the emergence of new media, that also become new channels for the dissemination of works of art and the source of apparition of new forms of art. From textual narration to the theater stage and video screen, the cross-media dissemination of the story of the White Snake can be summarized as the cross-media transmission of cultural heritage, which is also a completely new aesthetic experience that can be viewed both from the point of view of external form and from the point of view of internal content. In terms of form, the evolution of media technology has led to a change in artistic thinking, especially with regard to the formation of a character that vividly represents the cultural core of the White Snake legend on the screen. From the point of view of content, the spiritual subtext of the plot is the enduring idea of caring and humanism, which allows the cultural core of the legend of the White Snake to change its media form without changing its essence.
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Балаж, Н. А., та О. В. Петрухина. "ЗНАЧЕНИЕ ЦВЕТА В АНИМАЦИИ НА ПРИМЕРЕ МУЛЬТСЕРИАЛА «АРКЕЙН»". У Мультимедиа: современные тенденции IX Международная научно-практическая конференция. Crossref, 2024. http://dx.doi.org/10.54874/9785605054290_103.
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Цвет — один из главных инструментов визуального повествования в кинематографе. С его помощью автор задает тон произведения и передает информацию о происходящем на экране через подсознательные ассоциации. В данной статье рассматривается цветовое кодирование анимационного сериала «Аркейн» и его влияние на восприятие сюжета зрителем. Анализ подкреплен примерами из других произведений. Color is one of the main tools of visual storytelling in cinema. With it, the author sets the tone of the work and transmits information about what is happening on the screen through subconscious associations. This article discusses the color-coding of the animated series «Arcane» and its impact on the perception of the plot by the viewer. The analysis is supported by examples from other works.
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Manuel Figueiredo, Carlos, Ana Rafaela Diogo, and Joana André Leite. "Adapting Jane Austen to the screen: fashion and costume in Autumn de Wilde’s movie "Emma"." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1001538.
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The visual and behavioral codes prevalent in society at any given moment are part of its social conventions and constitute a framework that rules everyone´s image, dress and the attitudes that society not only tolerates but expects from them. However, it is unquestionable that despite the rigidity and formality imposed on personal appearance and manners, it is still possible to find some room to play with the possibilities afforded to people, albeit conditioned by their social status, so as to manage to express their inner self, mood, and even outlook on life, at any point in time. What is more, it is possible for an individual inserted in such a society to become the center around which everything revolves and trace a path to success, without necessarily trespassing any of the red lines drawn by society's norms. In her novels, Jane Austen chose as protagonists middle to upper class young women that stand out by managing to, in the limited scope of action afforded to them, work society in their favour so as to achieve their perceived notions of fulfillment and personal happiness. Based on one of Austen's novels Emma, and its 2020 movie adaptation directed by Autumn de Wilde, we will assess how Alexandra Byrne’s costumes work in relation to the aesthetics of Emma’s world and surroundings. As well as investigate how they showcase, are impacted and can even be read as symbolic representations of the course of her life, evolution and relationships in this movie, which is considered to be particularly faithful to the novel.Keeping this in mind, we will analyse several scenes that are key both in terms of the plot and the costumes of the main character—Emma. This analysis will consider filmic and design notions of characters, narrative and space, as well as their construction and representation. It will focus on questions of storytelling regarding how the viewer is informed about Emma’s personality and mood, as well as capable of feeling her emotions, in the key events of the plot. As well as try to answer why and how Emma and her costumes remain the main focus in almost every shot of the movie, and how components such as the fictional space, its framing and composition are always in relation and dependent on her and her portrayal.Despite this movie being Autumn de Wilde’s debut, her mastery of notions of visual hierarchies, aesthetics and cinematic techniques that keep Emma highlighted and the focus of the action at all times, in the foreground of the shot, is undeniable. This translates to impeccably shot spaces that are completely in tune with the costumes, providing a sense of ease or contrast to the characters' relation to the space, further highlighting the subjects in the main action.In such an aesthetically developed piece, it is then also unavoidable that Emma’s every interaction and the development of her relationships will have a direct impact on her inner image, and therefore her outer image, affecting her relation and attachments to her costumes.
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Roh, Cheol Hwan, Mohd Hisham Abd Hamid, Zaidi Awang@Mohamed, et al. "First Screenless Fracpack Application in Malaysia Proves to Be a Viable Development Method for Brown Fields and Marginal Fields." In Gas & Oil Technology Showcase and Conference. SPE, 2023. http://dx.doi.org/10.2118/214070-ms.
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Abstract As part of well cost reduction initiative, screenless fracpack has been successfully applied in Field D in which gravelpack or fracpack have been the prevalent sand control completion methods. This paper discusses the first application of screenless fracpack in Malaysia with description on design process, implementation method, challenges in design and execution, production performance, and the recommended way forward. Typical gravel pack or fracpack would require installation of downhole screen and packer assemblies, followed by gravel pack or fracpack pumping. The associated cost ranges from USD 1 million to USD 2 million for a multi-zone well. However, screenless fracpack application eliminates the high-cost screen and packer assemblies. Perforations are made with vertically oriented 0-180 degree phasing (up and down) to maximize fracture alignment with perforations as well as to minimize potential sand production from the perforations without fracture. Subsequently, perforations and near wellbore matrix are treated with resin injection to consolidate near wellbore formation in ensuring good sand/fines control in formation that is not fractured. Hydraulic fracturing utilizes tip screen out method to create short fracture length and wide fracture width to maximize dimensionless fracture conductivity. Proppant can be resin coated or treated with network of fibers to control proppant flowback in absence of downhole screen assemblies. All planned procedures have been successfully conducted. Perforations were made in a short interval i.e. about 2m in length with limited entry 4 SPF/ 0-180 degree phasing. Dynamic underbalance technique was incorporated to maximize open perforations effectively. Resin injection plan was dropped due to low permeability and low injectivity. Resin squeeze into a tight formation can end with either incomplete resin and overflush injection, or fracturing with the viscous resin, either of which would damage the formation. A highly conductive fracture has been created with tip screen out. Nolte Smith log-log plot showed a unit slope, an indication of tip screen out. Proppant flowback control was obtained with resin coated proppant. Post screenless fracturing, the well was carefully unloaded and cleaned. Well production showed good productivity and effective sand control. Currently, other fields are being studied and considered for the same application. Screenless fracpack is applied for the first time in a field offshore Malaysia. It is a bold step change whereby gravelpack or fracpack are commonly used as sand control. The application was driven by well cost reduction effort and the application is currently considered for replication in other fields. The benefit of the new method is not only the well cost savings by elimination of screen and packer assemblies, but it also provides full bore access and simpler well interventions. This application helps in brownfield and marginal field development whereby small reserves may negatively project economics due to high cost for gravelpack or fracpack installation.