Search results for "Statistical Analysis"
showing 10 items of 390 documents
Corrigendum: ExGUtils: A Python Package for Statistical Analysis With the ex-Gaussian Probability Density
2018
The study of reaction times and their underlying cognitive processes is an important field in Psychology. Reaction times are usually modeled through the ex-Gaussian distribution, because it provides a good fit to multiple empirical data. The complexity of this distribution makes the use of computational tools an essential element in the field. Therefore, there is a strong need for efficient and versatile computational tools for the research in this area. In this manuscript we discuss some mathematical details of the ex-Gaussian distribution and apply the ExGUtils package, a set of functions and numerical tools, programmed for python, developed for numerical analysis of data involving the ex…
Influence of mechanical properties of the sheet material on formability in single point incremental forming
2004
Abstract New trends in sheet metal forming are rapidly developing and several new forming processes have been proposed to accomplish the goals of flexibility and cost reduction. Among them single point incremental forming operations, in which the final shape of the component is obtained by the relative movement of a simple and small punch with respect to the blank, appear quite promising. In the paper, material formability issues in incremental forming were studied. Some relevant correlations among material formability and other mechanical properties of the material were analysed. The FLD 0 value, i.e. the major strain at fracture in plane strain conditions, was determined for different mat…
Analysis of Upper Limbs Target-Reaching Movement and Muscle Co-Activation in Patients with First Time Stroke for Rehabilitation Progress Monitoring
2022
In this paper, the authors analysed changes occurring during the rehabilitation processes in patients after early stroke based on analysis of their upper limbs’ target-reaching movement and muscle co-activation. Ischemic stroke often results in reduced mobility of the upper extremities and frequently is a cause for long-term disability. The ever-developing technology of 3D movement analysis and miniaturisation of equipment for testing the bioelectrical activity of muscles can help to assess the progress of rehabilitation. The aim of this study was to examine the use of analysis of target-reaching movement indicators and muscle co-activation for diagnosing the rehabilitation process in post-…
READING COMPETENCE AND ENGAGEMENT OF LATVIAN STUDENTS IN THE VIEW OF OECD PISA 2018 RESULTS
2020
Students' reading competence determines the achievements of learners in all areas of school education as well as in their further education, professional activity and life. The results of the OECD Program for International Student Assessment - OECD PISA 2018 confirm the need to improve reading competence in Latvia (OECD, 2019).The aim of the study is to analyze the achievement of Latvia's fifteen-year-old students in OECD PISA 2018 and the previous international program cycles in relation to students' reading engagement and its changes. Reading engagement significantly influences not only students' reading competence but are in themselves one of the goals of modern education (Guthrie & …
Rheological Behaviors of Waste Polyethylene Modified Asphalt Binder: Statistical Analysis of Interlaboratory Testing Results
2023
This article investigated the effect of waste polyethylene (PE) on the modified asphalt binders' rheological behavior from a statistical point of view. The interlaboratory testing results from the RILEM Technical Committee 279 Valorization of Waste and Secondary Materials for Roads Task Group 1 were used for this purpose. First, an unaged 70/100 penetration graded neat binder was selected as the reference material. Next, a single 5 % content of waste PE additives (PE-pellets and PE-shreds) was mixed with a 95 % neat binder to prepare two PE modified binders. Then, dynamic shear rheometer-based temperature-frequency sweep tests were performed over a wide range of temperatures and frequencies…
A critical review on the implementation of static data sampling techniques to detect network attacks
2021
International audience; Given that the Internet traffic speed and volume are growing at a rapid pace, monitoring the network in a real-time manner has introduced several issues in terms of computing and storage capabilities. Fast processing of traffic data and early warnings on the detected attacks are required while maintaining a single pass over the traffic measurements. To palliate these problems, one can reduce the amount of traffic to be processed by using a sampling technique and detect the attacks based on the sampled traffic. Different parameters have an impact on the efficiency of this process, mainly, the applied sampling policy and sampling ratio. In this paper, we investigate th…
Empreintes et pistes de rhinocerotidae (Mammalia, Perissodactyla) du gisement pliocène terminal de Laetoli (Tanzanie)
1993
Resume Les traces (empreintes et pistes) des rhinoceros actuels sont tres mal connues, et une seule empreinte fossile de rhinoceros neogene ou quaternaire a ete decrite a ce jour. A Laetoli 7 sites ont livre des traces de rhinoceros, toutes attribuables au nouvel ichnogenre Dicerotinichnus; les traces des sites H, I et J ne sont pas definissables specifiquement. Les traces des sites A et N (deux pistes dont une a 26 couples d'empreintes et une a 5 couples dont certains de tres bonne qualite) permettent de definir le nouvel ichnobinome Dicerotinichnus laetoliensis nov. sp. attribue a Ceratotherium praecox. Les traces des sites M West et M East (deux pistes a 4 et 8 couples d'empreintes et 4 …
Nautiles paléocènes du Niger
2001
Resume De nombreux nautiles tertiaires ont ete recoltes au Niger tant dans le Nord-Ouest du pays (region de Mentes et Tillia) que dans le centre (region de Kao) et, dans le Sud, aux environs de Malbaza. Leur etude montre deux faunes assez differentes, la plus riche, dans la region centrale (Kao), caracterisee par de nombreux specimens de Deltoidonautilus molli, la seconde, plus pauvre, caracterisee par Deltoidonautilus sudanensis et D. chudeaui aussi bien au Nord qu'au Sud. Malgre des differences considerables, ces formes qui peuvent etre attribuees au Paleocene, ne semblent pas, d'apres les fossiles associes (notamment l'echinide Linthia sudanensis sudanensis), indiquer une difference d'âg…
Motivational climate, goal orientation, perceived sport ability, and enjoyment within Finnish junior ice hockey players
2015
The aim of this study was to investigate the relations among situational motivational climate, dispositional approach and avoidance achievement goals, perceived sport ability, and enjoyment in Finnish male junior ice hockey players. The sample comprised 265 junior B-level male players with a mean age of 17.03 years (SD = 0.63). Players filled questionnaires tapping their perceptions of coach motivational climate, achievement goals, perceived sport ability, and enjoyment. For the statistical analysis, players were divided into high and low perceived sport ability groups. Multigroup structural equation modeling (SEM) revealed an indirect path from task-involving motivational climate via task-…
Frequency of Twin Pregnancies Following Renal Transplantation
1994
Objective: To evaluate the incidence of twin pregnancy among renal-transplanted women.Methods: A retrospective review based on three national inquiries. A computer literature search of the Medline system was done. Only reports of series were included. For statistical analysis the probability of having a twin pregnancy was assumed to be 0.012.Main Outcome Measures: Incidence of twin pregnancy in women after renal transplantation.Results: There were 7 sets of twins among 153 pregnancies reported in the national inquiry group (4.57%). Thus, the overall incidence of twin pregnancy in these women was 1 in 22 pregnancies. The frequency of twinning in series reporting pregnancies after renal trans…