1,452 results on '"Fiabilité"'
Search Results
2. Intra-observer reliability study of lumbar segmental measurements utilizing ultrasonography.
- Author
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Kruse, Ralph, Gudavalli, Maruti Ram, White, Bret, Bracho, Geracimo, and Rider, Stacey
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LUMBAR vertebrae physiology , *BIOMECHANICS , *SPINAL adjustment , *LYING down position , *VERTEBRAE , *DESCRIPTIVE statistics , *LUMBAR vertebrae , *STATISTICAL reliability , *INTRACLASS correlation , *SACRUM , *BODY movement , *LUMBAR pain , *EVALUATION ,RESEARCH evaluation - Abstract
Background: Spinal Manipulative Therapy (SMT) benefits LBP patients, but its mechanism is not well documented. One hypothesis indicates that SMT restores interspinal movements. Ultrasound measurement (UM) of spinous process separation (SPS) assesses the intersegmental movements. Methods: We used the test-retest reliability of UM between the L3, L4, L5, and S1 spinous processes on fifteen asymptomatic volunteers while lying prone on a chiropractic table. The participants then walked around for over 5 minutes, and ultrasound images were reperformed prone. UM identified the tips of the spinous processes and distances between L3-L4, L4-L5, and L5-S1. Reliability was assessed using intra-class correlation coefficient (ICC). Results: ICC values of SPS measurements were 0.982 for L3-L4, 0.992 for L4-L5, and 0.997 for L5-S1. Rootmean square difference between the two measures were 0.35mm for L5-S1, 0.36mm for L4-L5, and 0.57mm for L3-L4. Conclusions: This study found UM to be reliable in measuring interspinous distance. [ABSTRACT FROM AUTHOR]
- Published
- 2024
3. Testing reliability and validity of practitioner‐rated parental sensitivity: A novel tool for practice.
- Author
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Forrer, Mirte L., Oosterman, Mirjam, Tharner, Anne, and Schuengel, Carlo
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PARENTAL sensitivity , *TEST reliability , *SOCIAL skills , *MOTHER-child relationship , *TEST validity - Abstract
Improving parental sensitivity is an important objective of interventions to support families. This study examined reliability and validity of parental sensitivity ratings using a novel package of an e‐learning tool and an interactive decision tree provided through a mobile application, called the OK! package. Independent raters assessed parental sensitivity using the OK! package (N = 11 raters) and the NICHD Parental Sensitivity rating scales (N = 22 raters) on the basis of videotaped mother‐child interactions at 10‐ or 12‐months‐old (N = 294) and at 24‐months‐old (N = 204) from the Dutch longitudinal cohort study Generation2. Mothers reported on children's externalizing and internalizing problems and social competence when children were 4 and 7 years old. Results showed excellent single interrater reliability for raters using the OK! package (mean ICC =.79), and strong evidence for convergent validity at 10‐ or 12‐month‐old (r =.57) and 24‐month‐old (r =.65). Prospective associations of neither parental sensitivity rated using the OK! package or the NICHD Parental Sensitivity rating scales with child developmental outcomes were statistically significant (p >.05), with overlapping 95% confidence intervals for both measures. The OK! package provides a promising direction for testing alternatives to current training and instruction modalities. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
4. Patient, Family, Caregiver, and Community Engagement in Research: A Sensibility Evaluation of a Novel Infographic and Planning Guide.
- Author
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Giannini, Andrew Theodore, Leong, Megan, Chan, Kelvin, Ghaltaei, Arman, Graham, Eden, Robinson, Craig, Skorska, Malvina N., Cross, Andrea, and Gabison, Sharon
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COMMUNITY support ,SCALE analysis (Psychology) ,GRAPHIC arts ,RESEARCH methodology evaluation ,INTERVIEWING ,REHABILITATION ,STATISTICAL sampling ,CONTENT analysis ,RESEARCH evaluation ,FAMILY roles ,DESCRIPTIVE statistics ,CAREGIVERS ,PHYSICAL therapy research ,ALLIED health personnel ,SOUND recordings ,RESEARCH methodology ,CONCEPTUAL structures ,TEST validity ,PATIENT participation ,SENSITIVITY & specificity (Statistics) - Abstract
Copyright of Physiotherapy Canada is the property of University of Toronto Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
5. L'échographie dans la détection de l'enthésite chez l'enfant : revue systématique de la littérature.
- Author
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Rossi-Semerano, Linda, Ravagnani, Viviana, Collado, Paz, Vojinovic, Jelena, Roth, Johannes, Magni-Manzoni, Silvia, Naredo, Esperanza, D'Agostino, Maria Antonietta, and Jousse-Joulin, Sandrine
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ULTRASONIC imaging , *JUVENILE idiopathic arthritis , *LEG , *ACOUSTIC imaging - Abstract
Une revue systématique visant à évaluer l'apport de l'échographie dans la détection de l'enthésite chez les patients porteurs d'arthrite juvénile idiopathique (AJI). Une recherche bibliographique a été menée dans les bases de données PubMed et Embase pour la période comprise entre janvier 1966 et mai 2021 ; les articles qui répondaient aux critères d'inclusion selon la définition de l'enthésite échographique et les propriétés métrologiques étudiées ont été sélectionnés. Nous avons évalué les caractéristiques cliniques de la population cible, le design de l'étude, le type et le nombre d'enthèses examinées, la définition et le système de cotation de l'enthésite échographique ainsi que les propriétés métrologiques définies par le filtre OMERACT (vérité, discrimination et faisabilité). La qualité méthodologique des études a été analysée au moyen de l'échelle QUADAS-2 (Quality Assessment of Diagnostic Accuracy Studies 2). Cinq publications remplissaient les critères d'inclusion (26 à 146 patients et 1 à 10 sites d'enthèse examinés bilatéralement). Toutes les études étaient axées sur les enthèses des membres inférieurs. Les lésions élémentaires incluses dans la définition de l'enthésite chez l'adulte ont été généralement évaluées. Peu d'études ont rapporté la fiabilité de l'échographie et aucune n'a évalué sa sensibilité au changement. Les anomalies échographiques des enthèses étaient visibles chez 9,4 % à 53 % des patients atteints d'AJI et 20 % à 83 % des cas d'arthrite liée à l'enthésite (ERA). Il n'a été retrouvé aucune anomalie significative chez les sujets sains. L'exploration échographique a été faiblement corrélée à l'examen clinique. La qualité globale des études était faible, en raison notamment de l'absence de test de référence. L'échographie est un outil qui affiche une bonne sensibilité pour la détection des anomalies des enthèses dans l'AJI. D'après les données actuelles, il n'existe pas de définition échographique standardisée de l'enthésite dans la population pédiatrique. Par ailleurs, les critères de validité externe et interne de l'échographie n'ont pas été établis. A systematic review to assess the value of ultrasonography (US) for detecting enthesitis in juvenile idiopathic arthritis (JIA). PubMed and Embase databases were searched for articles published from January 1966 to May 2021; we selected those meeting the inclusion criteria according to the US definition of enthesitis and metric properties studied. We assessed the clinical features of the population, study design, the type and number of entheses examined, the definition and scoring system of US enthesitis and metric properties according to the OMERACT filter (truth, discrimination, feasibility). The quality of the studies was evaluated with the Quality Assessment of Diagnostic Accuracy Studies 2. Five publications met the inclusion criteria (26 to 146 patients and 1 to 10 bilaterally examined entheses). All studies focused on lower-limb entheses. The elementary lesions included in the definition of adult enthesitis were generally assessed. Few studies reported US reliability, and none evaluated sensitivity to change of US. US revealed entheseal abnormalities in 9.4 % to 53 % of JIA patients and 20 % to 83 % of enthesitis-related arthritis cases. No significant abnormalities were found in healthy children. US findings were poorly correlated with clinical examination. The overall quality of the studies was low, mainly because of the lack of a reference standard. US is a sensitive tool to detect entheseal abnormalities in JIA. The current evidence highlights that a standardized US definition of enthesitis in children is lacking and US criteria and discriminant validity have not been established. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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6. Evidencia de confiabilidad y validez del cuestionario Queja de Cambios Cognitivos (QCC) para personas adultas.
- Author
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Orjuela, Camila, Bedolla, Lucia, Salazar Montes, Ana María, and Moreno-Quintero, Cesar
- Abstract
Complaints about subjective cognitive changes are common in clinical consultations with individuals over 50 years old and are considered a predictive criterion for the onset of cognitive decline. The assessment of these complaints through questionnaires is infrequent due to the limited number available in the literature. Furthermore, most of them focus exclusively on the evaluation of amnestic changes and not on overall cognition. It is an instrumental study that allowed estimating the evidence of validity and reliability of the CCC questionnaire designed by Salazar and Maldonado (2020). The sample consisted of 258 individuals aged between 50 and 80 years without a diagnosis of cognitive impairment and mild cognitive impairment. An exploratory factor analysis was conducted, revealing correlations of 0.881 and 0.901 with criterion questionnaires and an internal consistency of the instrument with a Cronbach's alpha coefficient (a) of .973. The CCC questionnaire is useful for exploring subjective cognitive changes in adults. It is considered that it can be used in clinical consultations for a more comprehensive evaluation and as a predictor in detecting mild cognitive impairment. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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7. VISIBILIZAR LAS DESTREZAS DE PENSAMIENTO EN EDUCACIÓN PRIMARIA: DESARROLLO PSICOMÉTRICO DE UN INSTRUMENTO DE EVALUACIÓN.
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MANASSERO MAS, MARÍA ANTONIA and VÁZQUEZ ALONSO, ÁNGEL
- Subjects
CONFIRMATORY factor analysis ,EXPLORATORY factor analysis ,PSYCHOMETRICS ,PRIMARY education ,ELEMENTARY education ,CRITICAL thinking - Abstract
Copyright of Bordón: Journal of Education / Revista de Pedagogía is the property of Sociedad Espanola de Pedagogia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
8. Prévisions quantitatives : analyse et apport de l’expertise. Application aux stations de la Loire
- Author
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Matthieu Nicolas, Renaud Marty, and Yoann Faucard
- Subjects
Prévision quantitative ,expertise ,fiabilité ,précision ,Quantitative forecast ,Hydraulic engineering ,TC1-978 ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
Les prévisions quantitatives réalisées par les services de prévision des crues (SPC) sont un outil de communication majeur pour le réseau Vigicrues. Sur la Loire, les prévisions sont quotidiennes et elles sont archivées depuis 2017 constituant une base de données suffisante pour analyser la fiabilité et la précision de ces données selon trois angles. L’analyse en fonction de la date de production confirme l’amélioration continue de la fiabilité de ces prévisions. La comparaison aux prévisions brutes issues de la modélisation souligne quant à elle l’apport positif de l’expertise des prévisionnistes. Enfin, l’analyse des prévisions réalisées pendant les crues ne montre pas de dégradation des résultats confirmant ainsi la pertinence des outils développés et des formations élaborées pour les prévisionnistes visant à leur fournir la meilleure information possible. Cependant, dans la partie estuarienne, des difficultés sont rencontrées pour réaliser des prévisions mettant en évidence la limite des outils et la nécessité d’en développer des nouveaux.
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- 2024
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9. How Far Will Managers Go to Look Like a Good Steward? An Examination of Preferences for Trustworthiness and Honesty in Managerial Reporting†.
- Author
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Abdel‐Rahim, Heba Y., Hales, Jeffrey, and Stevens, Douglas E.
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ACCOUNTING standards ,AGENCY costs ,HONESTY ,INDUSTRIAL costs ,UTILITY functions - Abstract
Copyright of Contemporary Accounting Research is the property of Canadian Academic Accounting Association and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
10. The faithful presentation of corporations' CSR standalone reports — a Canadian study.
- Author
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Gosselin, Anne Marie and Berthelot, Sylvie
- Abstract
Copyright of Recherches en Sciences de Gestion is the property of ISEOR and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
11. La spiritualité implicite : un apport à l'étude de la spiritualité en psychologie existentielle.
- Author
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Roussiau, N., Ameline, A., Biccheri, E., and Renard, E.
- Abstract
La spiritualité est une thématique souvent évoquée en psychologie existentielle, c'est aussi un terme complexe et ambiguë. Nous avons développé le concept de spiritualité implicite, c'est-à-dire que nous abordons la spiritualité qu'elle soit religieuse ou non religieuse (areligieuse) sans la nommer. Nous travaillons uniquement à partir des dimensions qui la constituent. C'est au fil de notre pratique professionnelle que le concept de « spiritualité implicite » a pris forme. Par conséquent nous présentons dans cet article la validation d'une échelle de spiritualité implicite. Spirituality is a theme often evoked in existential psychology, it is also a complex and ambiguous term. We have developed the concept of implicit spirituality, that is to say that we approach spirituality whether it is religious or non-religious (areligious) without naming it. We work only from the dimensions that constitute it. It is through our professional practice that the concept of "implicit spirituality" has taken shape. Consequently, in this article we present the validation of a scale of implicit spirituality. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
12. Getting Personal: the issues of trust and distrust in small and medium-sized enterprises in Nigeria.
- Author
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Omeihe, Kingsley Obi, Amoako, Isaac Oduro, Gustafsson, Veronika, Khan, Mohammad Saud, and Omeihe, Ibiyemi
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TRUST ,SMALL business ,SUSPICION - Abstract
Copyright of Journal of Small Business & Entrepreneurship is the property of Routledge and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
13. Validación colombiana de la Escala de Funcionamiento Familiar en Situaciones de Crisis (F-COPES).
- Author
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Eugenia Cabrera-García, Victoria, Docal-Millán, María del Carmen, María Acuña-Arango, Lina, Campos-García, Ximena, Varela-Jaramillo, Mariana, and Riveros-Munévar, Fernando
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COGNITIVE restructuring therapy , *CRONBACH'S alpha , *PSYCHOMETRICS , *SOCIAL support , *LEAST squares - Abstract
The objective was to determine the psychometric properties of the F-COPES in the Colombian population. Cross-sectional study, with 1373 people, aged between 18 and 84 years. Data were analyzed in Jasp, exploratory factor analyzes were performed using the weighted least squares estimation method and a promax-type oblique rotation. Confirmatory factor analyzes with diagonalized weighted least squares estimators and robust analysis methods. Internal consistency analysis using Cronbach's Alpha indices, McDonald's Omega, and the highest lower limit index. A structure of five factors was found, four original ones: finding social support, cognitive restructuring, finding spiritual support and passive evaluation, and a new one: neighbor support. The scale evaluates family functioning in crisis situations in the Colombian context. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
14. Escala de Uso Problemático Generalizado del Internet 2: adaptación para adultos de Buenos Aires.
- Author
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Stover, Juliana Beatriz, Fernández Liporace, María Mercedes, and Castro Solano, Alejandro
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CONFIRMATORY factor analysis , *CRONBACH'S alpha , *PSYCHOLOGICAL well-being , *SOCIAL networks , *TIME management - Abstract
The Generalized Problematic Internet Use Scale 2 was adapted for the adult population of Buenos Aires. Participants were 225 subjects (68.4% female; 30.7% male, 0.9% nonbinary). Instruments administered were: survey of sociodemographic data and characteristics of use of social networks; Generalized Problematic Internet Use Scale 2; Mental Health Continuum Short Form and; Symptom Check List-27. Confirmatory factor analysis was carried out; It was found an adequate fit of the structure proposed by the original author. Cronbach's and ordinals alphas ranged from .77 to .87. Significant positive correlations were found between the generalized problematic use of the Internet, the psychopathological symptoms and the time of use of social media. Associations were negative with psychological well-being. [ABSTRACT FROM AUTHOR]
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- 2023
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15. Beyond TAM: the impact of trust, privacy control and reliability on an individual's intention to use a coronavirus contact tracing App.
- Author
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Ologeanu-Taddei, Roxana, Guthrie, Cameron, and Fosso-Wamba, Samuel
- Abstract
Copyright of Management international / International Management / Gestiòn Internacional is the property of Management International and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
16. Exploring the feasibility of validating early developmental screening tools for American Indian and Alaska Native children.
- Author
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Asdigian, Nancy L., Howley, Caitlin Trucksess, Sarche, Michelle, Clifford, Carrie, Miller, Amanda K., and Whitesell, Nancy Rumbaugh
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NATIVE American children , *VIRTUAL communities , *ALASKA Natives , *PSYCHOLOGICAL feedback - Abstract
Screening children from birth through age 5 is critical to early identification of challenges and referral to intervention to support optimal development. Screening of American Indian and Alaska Native (AIAN) children lags behind that of other children, partly due to the lack of screening tools validated for this population. This study tested the feasibility of an online data collection strategy for use in a future study of the validity of existing screening instruments for AIAN children. Parents of AIAN children in four communities were recruited to complete screeners, provide demographic information, and provide feedback on experiences with online data collection. Participants were given the option of receiving screening results from the local early childhood program through which they were recruited. 240 participants began the process, 183 were enrolled in a partner program and reported a birthdate for at least one AIAN child, 157 had an age‐eligible child, 81 began the consent process, 62 consented, and 39 fully completed data collection. Most participants were female and AIAN, the majority reported that online data collection was easy. Collecting screener validation data on a large sample of AIAN children may be able to utilize online data collection tools, with in‐person support to facilitate participation. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
17. Diseño y validación de cuestionarios para monitorizar el desarrollo de competencias transversales en el Trabajo de Fin de Grado.
- Author
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ORBEA-AIZPITARTE, GORETTI, REKALDE-RODRÍGUEZ, ITZIAR, and GALARRETA LASA, JAVIER
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EARLY childhood education , *PSYCHOLOGY of students , *CRONBACH'S alpha , *TEST validity , *PRIMARY education - Abstract
This study shows the design and validation of the set of questionnaires called IKasGral, the aim of which is to explore students' perceptions of the development of crossskills deployed in the Final Degree Project (Bachelor Thesis) in Education degrees (Pedagogy, Social Education, Early Childhood Education and Primary Education). The article describes (i) the validation process, which was carried out with five experts in the field and a doctoral student related to the subject; and (ii) the reliability of the instrument by 48 students from four Education degrees of the University of the Basque Country at its three campuses. Results were positive with respect to the index of content validity (0.81) and an internal consistency of over 0.6, according to Cronbach's alpha coefficient of reliability. This study concludes by pointing out that these questionnaires can be transferred to other contexts that share the same or similar aims and open up the possibility of monitoring cross-skills in the Final Degree Project subject for the Degrees in Education. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
18. Psychometric properties and adaptation of the Virtual Week in a sample of French young and older adults.
- Author
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Blondelle, Geoffrey, Quaglino, Véronique, Gounden, Yannick, Dethoor, Anaïs, Duclos, Harmony, and Hainselin, Mathieu
- Abstract
Copyright of European Review of Applied Psychology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
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19. La capacité d’interrompre la propagation d’une catastrophe? Place du leader dans le repérage de situations à risques.
- Author
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Bris, Sophie Le
- Subjects
CRISIS management ,PSYCHOLOGICAL resilience ,SHIPS ,DISASTERS - Abstract
Copyright of Management international / International Management / Gestiòn Internacional is the property of Management International and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
20. Are YouTube videos on allergic rhinitis a good source of information for patients seeking a cure for their illness?
- Author
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Doluoglu, S. and Gultuna, S.
- Abstract
Copyright of Revue Francaise d'Allergologie is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
21. Parent-Child Agreement on the Mini International Neuropsychiatric Interview for Children and Adolescents (MINI-KID).
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McDonald, Erica, Whitney, Sydney, Horricks, Laurie, Lipman, Ellen L., and Ferro, Mark A.
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SEPARATION anxiety , *CHILD psychiatry , *PARENT-child relationships , *TREATIES , *CHILD psychopathology , *PARENTS , *MEDICAL personnel , *CHILDREN of people with mental illness , *CHILDREN with disabilities - Abstract
Objective: Multiple informants are often used in the assessment of child psychopathology; however, parent-child agreement is low in child psychiatry. The objective of this exploratory study was to assess informant agreement on the Mini International Neuropsychiatric Interview for Children and Adolescents (MINI-KID) in a clinical sample of children with mental disorders and their parents, and to examine health and demographic factors associated with agreement. Method: MINI-KID results were analyzed for 88 parent-child dyads. Children were between 8-17 years old and were receiving in- or outpatient services for at least one mental disorder at a pediatric hospital. Kappas were calculated to assess parent-child agreement and logistic regression models were used to identify factors associated with agreement. Results: Agreement was low to moderate (κ=0.19-0.41) across the MINI-KID modules. Household income was associated with agreement for major depression, generalized anxiety, and attention-deficit hyperactivity disorder. Recruitment setting and parent psychological distress were associated with agreement for generalized anxiety and separation anxiety, respectively. Age, sex, and child disability/impairment were not associated with agreement. Conclusions: Parent-child agreement on the MINI-KID was low to moderate, and few factors were associated with agreement. These initial findings reaffirm the need for multiple informants when assessing psychopathology in children and can be used by health professionals to facilitate parent-child discussions in clinical settings in child psychiatry. [ABSTRACT FROM AUTHOR]
- Published
- 2021
22. Pourquoi ne peut-on pas faire confiance à la plupart des résultats issus de la recherche ?
- Author
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Ioannidis, John P.A.
- Subjects
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PREJUDICES , *SCIENTIFIC knowledge , *PROBABILITY theory , *METHODOLOGY , *STATISTICS - Abstract
Objectif.- On constate une préoccupation croissante concernant la véracité des publications scientifiques. La probabilité qu'un résultat publié soit vrai peut dépendre de la puissance de l'étude et d'éventuels biais ; du nombre d'autres études sur le même sujet ; et, de manière cruciale, du taux de résultats positifs par rapport à celui de résultats nuls parmi les rapports étudiés par chaque domaine scientifique. Des simulations sont effectuées pour évaluer la probabilité qu'un résultat publié soit faux. Dans ce contexte, un résultat a une moindre probabilité de véracité quand le nombre d'études similaires effectuées dans un domaine donné est petit ; quand les tailles d'effet sont plus petites ; quand le nombre de relations étudiées est plus important et leur présélection plus petite ; quand il y a une plus grande flexibilité dans le protocole, les définitions, les mesures et la modalité d'analyse ; quand il y a un plus grand intérêt financier (avec le biais qui peut l'accompagner) ; et quand plusieurs équipes dans un domaine sont engagées dans une course aux résultats qui soient statistiquement significatifs. Pour de nombreux champs de recherche actuels, des résultats publiés ne sont ni plus ni moins qu'un reflet fidèle des biais régnants. Dans cet essai, j'explore les implications de ces problèmes par rapport à la conduite et l'interprétation de la recherche. There is increasing concern that most current published research findings are false. The probability that a research claim is true may depend on study power and bias, the number of other studies on the same question, and, importantly, the ratio of true to no relationships among the relationships probed in each scientific field. Simulations are performed to assess the likelihood that a published result is false. In this framework, a research finding is less likely to be true when the studies conducted in a field are smaller; when effect sizes are smaller; when there is a greater number and lesser preselection of tested relationships; where there is greater flexibility in designs, definitions, outcomes, and analytical modes; when there is greater financial and other interest and prejudice; and when more teams are involved in a scientific field in chase of statistical significance. For many current scientific fields, claimed research findings may often be simply accurate measures of the prevailing bias. In this essay, I discuss the implications of these problems for the conduct and interpretation of research. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
23. Proposal and thermoeconomic evaluation with reliability considerations of geothermal driven trigeneration systems with independent operations for summer and winter.
- Author
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Takleh, H. Rostamnejad and Zare, V.
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PRODUCT costing , *SUMMER , *HEAT exchangers , *RELIABILITY in engineering , *THERMAL efficiency , *GEOTHERMAL resources - Abstract
• Thermoeconomic analysis of two novel geothermal driven trigeneration systems is presented. • The systems are developed to operate in complete CHP or CCP modes independently. • The systems can be simply switched between summer and winter modes. • The levelized product cost of System II is 28.51 $/GJ for summer application mode • The proposed systems perform better than the available similar ones in the literature. Novel tri-generation systems are developed to operate in a complete CHP or CCP mode, with having relatively simple configuration to meet a cost-effective design. The system consists of conventional Rankine and ejector refrigeration cycles in which CO 2 is used as the environmentally-friendly working media (System I). To enhance performance of the proposed System I, a modification is made by incorporation of an internal heat exchanger to form the System II. Thermoeconomic performance of the systems are evaluated and optimized based on levelized cost of system products. Also, the reliability of the proposed systems are evaluated and discussed. It is found that, the proposed System II has exergy efficiency and levelized product cost of 39.68% and 28.51 $/GJ, for summer application mode. The results also indicated that at optimal operating conditions, System II has lower levelized product cost than System I by 10.4% and 2.3%, besides it has higher exergy efficiency than System I by 11.4% and 4.0%, for summer and winter modes, respectively. However, for winter applications, System I performs better than System II in terms of heating output and thermal efficiency by 97.3% and 34.1%, respectively. The results demonstrated that, the proposed systems offer opportunity of selecting a suitable one depending on the user's energy (power, cold or heat) demand. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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24. TRAIT META-MOOD SCALE-24: ESTRUCTURA FACTORIAL, VALIDEZ Y CONFIABILIDAD EN ESTUDIANTES UNIVERSITARIOS ARGENTINOS.
- Author
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GONZÁLEZ, ROCÍO, BRENDA CUSTODIO, JESICA, FEDERICO ZALAZAR-JAIME, MAURICIO, and ADRIÁN MEDRANO, LEONARDO
- Published
- 2021
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25. Teste de Fluência em Leitura (TFL): desenvolvimento, evidências de validade e precisão.
- Author
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Brito, Gabriel R., Águas Maia, Suzete A., and Seabra, Alessandra G.
- Subjects
- *
PORTUGUESE language , *PSYCHOMETRICS , *ACHIEVEMENT gains (Education) , *ANALYSIS of variance , *ELEMENTARY schools - Abstract
Reading fluency is a relevant skill in discriminating between readers with and without reading problems, especially in postliteracy grades and in more regular languages such as Brazilian Portuguese. Reading fluency measures help monitor students' progress in response to reading interventions. Objective: To develop and investigate the psychometric properties of a test to evaluate reading fluency of isolated words and texts in Elementary School-II. Method: The study had 3 phases: 1) Development of Reading Fluency Test (TFL); 2) Pilot study; 3) Study for evidence of validity and accuracy. In phase 1, the test was developed with two parts, reading single words and reading texts. In phase 2, 48 students from a state school in São Paulo participated, being 29 students from the 6th grade and 19 from the 9th grade. This phase revealed the 9th grade had greater performance than 6th grade, as expected, and led to changes in the instructions. In phase 3, another 145 students from 6th to 9th grade participated, 74 of them male (51%) from the same school where the pilot study took place. Results: Analysis of Variance revealed, in general, a significant increase in performance with school progression, with differentiation especially between initial years. There were moderate correlations between measures of fluency of isolated words and text. Correlations with Portuguese school grades were low. Reliability analyzes indicated adequate internal consistency, however, there are items with low discrimination index. In this way, the TFL proved to be a promising instrument, but more suitable for the evaluation of 6th and 7th years. Changes must be made to make it more sensitive to the final grades of Elementary School. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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26. French validation of the Emotion Regulation Skills Questionnaire.
- Author
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Nardelli, Carla, Montreuil, Tina, Naoufal, Michael, Berking, Matthias, Baeyens, Céline, and Bortolon, Catherine
- Abstract
Copyright of European Review of Applied Psychology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
27. Les dispositifs de retour d'expérience (REX) moteurs d'apprentissage organisationnel pour maîtriser les risques: l'apport de l'ergonomie.
- Author
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Bringaud, Violaine
- Subjects
- *
ORGANIZATIONAL learning , *ORGANIZATIONAL change , *WORK experience (Employment) , *WORK structure , *BEST practices - Abstract
This communication is part of the symposium project "Ergonomists in skills development and organizational learning to control risks". Based on an experience of twenty years of intervention and research in the field of operating experience feedback (OEF), this communication first proposes to return to the limits of the OEF devices to then present a master plan to make OEF a real learning engine, capable of ensuring effective feedback of experience in working practices and organizations to better control risks. [ABSTRACT FROM AUTHOR]
- Published
- 2020
28. Empowering Saudi women in higher educational institutions: Development and validation of a novel women empowerment scale.
- Author
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Al-Qahtani, Awad M., Elgzar, Wafaa T., Ibrahim, Heba A., and Sayed, Hanan A. El
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EXPERIMENTAL design ,RELIABILITY (Personality trait) ,META-analysis ,RESEARCH evaluation ,RESEARCH methodology ,RESEARCH methodology evaluation ,SELF-perception ,SELF-efficacy ,TEST validity ,FACTOR analysis ,INTRACLASS correlation ,STATISTICAL correlation ,DATA analysis software ,HEALTH promotion ,WOMEN'S health - Abstract
Copyright of African Journal of Reproductive Health is the property of Women's Health & Action Research Centre and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
29. Psychometric properties of a standardized protocol of muscle strength assessment by hand-held dynamometry in healthy adults: a reliability study
- Abstract
Background Maximal isometric muscle strength (MIMS) assessment is a key component of physiotherapists’ work. Hand-held dynamometry (HHD) is a simple and quick method to obtain quantified MIMS values that have been shown to be valid, reliable, and more responsive than manual muscle testing. However, the lack of MIMS reference values for several muscle groups in healthy adults with well-known psychometric properties limits the use and the interpretation of these measures obtained with HHD in clinic. Objective To determine the intra- and inter-rater reliability, standard error of measurement (SEM) and minimal detectable change (MDC) of MIMS torque values obtained with HHD. Methods Intra and Inter-rater Reliability Study. The MIMS torque of 17 muscle groups was assessed by two independent raters at three different times in 30 healthy adults using a standardized HHD protocol using the MEDup™ (Atlas Medic, Québec, Canada). Participants were excluded if they presented any of the following criteria: 1) participation in sport at a competitive level; 2) degenerative or neuromusculoskeletal disease that could affect torque measurements; 3) traumatic experience or disease in the previous years that could affect their muscle function; and 4) use of medication that could impact muscle strength (e.g., muscle relaxants, analgesics, opioids) at the time of the evaluation. Intra- and inter-rater reliability were determined using two-way mixed (intra) and random effects (inter) absolute agreement intraclass correlation coefficients (ICC: 95% confidence interval) models. SEM and MDC were calculated from these data. Results Intra- and inter-rater reliability were excellent with ICC (95% confidence interval) varying from 0.90 to 0.99 (0.85–0.99) and 0.89 to 0.99 (0.55–0.995), respectively. Absolute SEM and MDC for intra-rater reliability ranged from 0.14 to 3.20 Nm and 0.38 to 8.87 Nm, respectively, and from 0.17 to 5.80 Nm and 0.47 to 16.06 Nm for inter-rater reliability, respectively.
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- 2023
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30. Hormonelle Kontrazeption bei Übergewicht und Adipositas
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Segerer, Sabine Elisabeth
- Published
- 2022
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31. Méthode de préconditionnement du HEMT GaN pour une mesure reproductible de Vth
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Ghizzo, Lucien, Trémouilles, David, Richardeau, Frédéric, Convertisseurs Statiques (LAPLACE-CS), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT), Équipe Intégration de Systèmes de Gestion de l'Énergie (LAAS-ISGE), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Thales SIX GTS France
- Subjects
[SPI.NRJ]Engineering Sciences [physics]/Electric power ,fiabilité ,[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics ,protocole de préconditionnement ,variation de la tension de seuil ,transistor p-GaN Schottky ,piégeage - Abstract
National audience; RESUME - Dans les études de fiabilité, l'instabilité de la tension de seuil (Vth) est problématique lorsque V th est utilisé comme indicateur car elle masque une éventuelle dérive due au vieillissement réel du composant. Cette instabilité est observée lors des mesures de caractérisation électrique. Elle est liée à "l'historique de polarisation" du transistor qui peut introduire un phénomène de piégeage/dépiégeage de porteurs dans différentes couches de la structure. De nouvelles méthodes sont donc nécessaires pour surmonter ces problèmes d'instabilité liés au piégeage afin de surveiller avec précision le vieillissement des transistors en GaN. Pour résoudre le problème de répétabilité de la mesure de la tension de seuil, nous avons étudié son instabilité sur les transistors GaN. Une étape de préconditionnement appliquée juste avant la mesure réelle de Vth a été étudiée. La méthode de préconditionnement proposée est basée sur l'application d'une polarisation VGS(t) dédiée sur l'électrode de grille qui conduit à une valeur stable et répétable de Vth. Les mécanismes permettant la stabilité observée de Vth sont identifiés grâce à l'analyse de la mesure de fuite de drain après la mesure préconditionnée de Vth. La modification de la courbe de fuite démontre le rôle de l'injection de trous dans la structure. La méthode de mesure préconditionnée de Vth est proposée comme mesure complémentaire pour suivre correctement le vieillissement du p-GaN HEMT dans les futures études de fiabilité.
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- 2023
32. Analysis on the reliability of R290 rotary compressor in the high ambient temperature.
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Wu, Jianhua, Shi, Hongyan, and Li, Jiachen
- Subjects
- *
HIGH temperatures , *MINERAL oils , *COMPRESSORS , *SYNTHETIC lubricants , *RELIABILITY in engineering - Abstract
• The reliability of R290 rotary compressor experimentally and numerically studied. • Study was conducted at ambient temperature (t a) 35°C, 46°C, 55°C, with SO, MO oil. • Oil sump viscosity decreases with the increase of t a , and solubility varies little. • Oil film thicknesses of bearings were analyzed at different t a. • The motor still works normally with condensing temperature 70°C. The R290 rotary compressor is suggested to use in split room air conditioners in hot climate areas for its higher efficiency, environmental-friendly, and lower discharge temperature. However the higher condensing temperature and pressure would result in reliability problems. In this paper the reliability of rotary compressor with R290&MO and R290&SO (mainly including the motor reliability; the oil sump viscosity, temperature and solubility; the oil film thickness of bearings) under the ambient temperature of 35 °C,46 °C,55 °C were studied experimentally and numerically. The results show that the motor temperature in R290 rotary compressor is lower than the allowable maximum temperature even under the condition of EXT/8 (condensing temperature = 70 °C). In addition, the oil sump viscosity of either synthetic oil (SO) or mineral oil (MO) decrease with the increase of ambient temperature (SO: from 4.7cp to 3.1cp; MO: from 2.2cp to 1.6cp), while under any condition, the solubility of SO (15%–16%) or MO (22%–25%) varies little. Besides, in the high ambient temperature (46 °Cand 55 °C), it is feasible to increase suction superheat to satisfy the proper viscosity when MO is used, while it is infeasible to SO. Influenced by oil viscosity and load, the oil film thickness of main bearing, sub bearing and eccentric bearing decrease with the increase of ambient temperature. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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33. The My Emotions Questionnaire: A self‐report of mothers' emotional responses to infant crying.
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Leerkes, Esther M. and Qu, Jin
- Subjects
- *
EMOTIONAL conditioning , *INFANTS , *ATTRIBUTION (Social psychology) , *EXPLORATORY factor analysis , *CONFIRMATORY factor analysis , *EMOTIONS , *PSYCHOMETRICS , *MOTHERS - Abstract
The purpose of this article was to examine the psychometrics of the My Emotions Questionnaire, a self‐report designed to assess mothers' emotional reactions when their infants cry. Participants were 240 first‐time mothers. When infants were 6 months and 1 year old, mothers completed the new questionnaire and measures assessing beliefs and behavioral responses to infant crying, and interview‐based measures of mothers' emotional reactions and causal attributions about crying were administered. Maternal sensitivity and negative behaviors were observed when infants were 6 months and 1 and 2 years old. Mothers reported on their discipline practices when children were 2 years old. Five emotion factors emerged based on exploratory factor analysis (EFA) of the 6‐month data: Amusement, Anxiety, Frustration, Sympathy, and Protective. The five‐factor structure was supported via a confirmatory factor analysis (CFA) of the 1‐year data. All scales demonstrated adequate internal consistency reliability and significant stability from 6 months to 1 year. Amusement, Frustration, and Protectiveness demonstrated the best convergent validity with cry cognitions and predictive validity to parenting measures, followed by Anxiety, although effects tended to be small to moderate. Evidence for the validity of Sympathy was less compelling. The potential utility of the questionnaire for basic and applied research is discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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34. Fiabilité et validité de l'Échelle de compréhension sociale des enfants.
- Author
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Brosseau-Liard, P. and Poulin-Dubois, D.
- Abstract
Ce manuscrit rapporte les résultats de trois études sur la fiabilité et la validité de l'Échelle de compréhension sociale des enfants (ÉCSE), une adaptation française du questionnaire parental Children's Social Understanding Scale développé par Tahiroglu et al. (2014). Dans une première étude administrée aux parents de 382 jeunes enfants, l'ÉCSE démontre dans sa fiabilité interne et ses corrélations avec d'autres construits des propriétés similaires à la version originale anglaise de l'échelle. Une deuxième étude (n = 63) démontre la fiabilité test-retest de l'échelle alors qu'une troisième étude (n = 68) confirme que les réponses parentales sur l'ÉCSE corrèlent positivement avec les scores des enfants sur une échelle comportementale de théorie de l'esprit. Ces données confirment la fiabilité et la validité de l'ÉCSE, offrant un nouvel outil aux chercheurs travaillant avec des populations d'enfants francophones. This manuscript presents data on the reliability and validity of a French translation of the Children's Social Understanding Scale (CSUS; Tahiroglu et al., 2014), a parent-report scale assessing theory of mind in young children. In a first study, parents of 382 typically developing children (34–82 months; M = 55 months; 193 males) completed an online questionnaire (215 in English and 167 in French) including the CSUS or its French translation, l'Échelle de compréhension sociale des enfants (ÉCSE), as well as subscales of the short-form Children's Behavior Questionnaire (CBQ; Putnam & Rothbart, 2006) and demographic questions. Internal consistency of the CSUS/ÉCSE was high and similar between French and original English versions (French: long form α =.929, ρ =.933, n = 99, short form α =.896, ρ =.901, n = 128; English: long form α =.935, ρ =.936, n = 100, short form α =.860, ρ =.869, n = 146). Correlations between the mean CSUS/ÉCSE score and children's age in months were significantly positive and similar across languages, English: r =.478, P <.001, French: r =.569, P <.001, difference: Z = 1.21, P =.226, ns. In both languages, the CSUS/ÉCSE correlated positively with CBQ subscales of attention (English: r (205) =.298, P <.001; French: r (165) =.353, P <.001) and inhibition (English: r (205) =.538, P <.001; French: r (165) =.421, P <.001). A confirmatory factor analysis constraining variances and covariances of the six CSUS/ÉCSE subscales to be equal between languages yielded a non-significant Chi
2 , χ2 (33) = 6.204, ns. In a second study, French-speaking parents completed the ÉCSE twice one week apart for 63 children (M child age: 50 months; 31 females). Test-retest reliability was high, r =.967. In a third study, 68 children (33–78 months; M = 54 months; 30 males) were administered the four easiest tasks of a widely used behavioral theory of mind scale (Wellman & Liu, 2004) and their French-speaking parents completed the ÉCSE. Behavioral theory of mind from the Wellman & Liu (2004) scale and parent-report theory of mind from the ÉCSE were positively correlated (long form: r (68) =.350, P =.003; short form: r (68) =.364, P =.002), and these correlations held even after controlling for age (long form: r =.281, P =.021; short form: r (68) =.242, P =.049). Together, these findings support the reliability and validity of the French-language ÉCSE. Translated items are provided in appendix for use by researchers working with francophone populations. [ABSTRACT FROM AUTHOR]- Published
- 2019
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35. Dans la conception des salles de régulation du SAMU, pouvoir communiquer est un enjeu de fiabilité de ses missions.
- Author
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Bourgeois, Fabrice, Vanpoulle, Christophe, and Ammirati, Christine
- Abstract
When it was relocated to the new university hospital, the design of the SAMU dispatch center in France (Somme region) France became an object of debate regarding: on the one hand, a theoretical approach to reliability that emerged at the time of its creation and which aimed to reduce or even prevent oral communications and, on the other hand, a pragmatic and empirical approach by users who supported behavioural and oral communications in the processing of calls. Dispatch center staff set out to lead the redesign project and integrate their expertise. In response to the tragedy that occurred after the inappropriate treatment of one caller to a SAMU center, this presentation reflects on the importance of the design of the dispatch room, and its ability to foster proxemic cooperation capable of anticipating possible individual misconduct. [ABSTRACT FROM AUTHOR]
- Published
- 2019
36. Pratiques de fiabilité humaine et organisationnelle à la SNCF.
- Author
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Blatter, Christian
- Subjects
- *
SOCIOTECHNICAL systems , *INDUSTRIAL management , *SYSTEM safety , *RISK assessment , *QUANTITATIVE research - Abstract
This text answers the 4 questions of the symposium "Ergonomics in the management of industrial risks: from a posteriori prevention to the design of safe socio-technical systems" on the practices of human and organisational reliability at French Railways. It describes the modes of analysis of the determinants of safety events by ergonomists and Human and Organisational Factors (HOF) actors, the place of this analysis in the experience feedback in order to make it a proactive tool for identifying risks. It discusses the action of ergonomists in various safety management systems: experience feedback, risk analysis, prescription documents, training and safety culture. It specifies the means of intervention of HOF actors in short, medium and long terms projects, as well as in innovative design. He concludes by referring to the way in which ergonomists use the system approach without, however, denying quantitative methods and behavioural approaches. [ABSTRACT FROM AUTHOR]
- Published
- 2019
37. De la sélection à la structure factorielle de l'instrument de mesure : Principes et exemple d'application
- Author
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ERRABI,Ghizlane and HAMADI,Chakib
- Subjects
Instrument de mesure ,fiabilité ,exigence de contenu ,analyse factorielle ,récupération de la satisfaction - Abstract
La mesure signifie la transformation d’une affirmation subjective en réalité objective (Joshi et al., 2015). Pour ce faire, plusieurs techniques psychométriques sont demandées. Dans la littérature s’intéressant à la mesure, de nombreux instruments sont proposés, d’où la question de la sélection d’un instrument de mesure adéquat et pertinent se pose. Pour sélectionner notre instrument de mesure, il a fallu trouver une méthode appropriée. Dans ce sens, nous nous sommes basés sur trois critères, il s’agit de la fiabilité, de l’exigence du contenu et de l’exigence du contexte. Egalement, nous allons mener par la suite une analyse factorielle exploratoire pour montrer la structure factorielle de l’instrument de mesure choisi. L’évaluation de la fiabilité sera aussi développée à ce niveau. Pour bien clarifier ces aspects nous allons traiter les éléments abordés en prenant l’exemple de la variable « récupération de la satisfaction ». Cet article vise essentiellement à expliquer la démarche de la sélection d’un instrument de mesure dans une recherche en marketing et à présenter les résultats de la phase exploratoire menée sous SPSS.
- Published
- 2023
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38. Impact of centralized-radio access network architecture on 5G performance
- Author
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Alhajj, Tania, Advanced technologies for operated networks (ADOPNET), Université de Rennes (UR)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-RÉSEAUX, TÉLÉCOMMUNICATION ET SERVICES (IRISA-D2), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Département Systèmes Réseaux, Cybersécurité et Droit du numérique (IMT Atlantique - SRCD), IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Ecole nationale supérieure Mines-Télécom Atlantique, and Xavier Lagrange
- Subjects
Energy consumption ,[INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI] ,Latence ,Harq ,Latency ,Radio resources ,C-Ran ,Fiabilité ,Ressources radio ,Reliability ,Consommation d’énergie ,5g - Abstract
Fifth Generation (5G) mobile networks are paving the way for a new Radio Ac-cess Network (RAN) architecture. This is the Centralized-RAN (C-RAN) which groups some of the Base Station (BS) functions in a Central Unit (CU) connected to Radio Units (RU) distributed in different sites where the other BS functions are implemented. This thesis studies how to take advantage of C-RAN to combine high reliability and low latency on the one hand and to minimize the power consumption of the BS on the other hand. Both single and multi-RU transmissions, as well as a mixture of both, are evaluated. We compare a single-RU approach where the Hybrid Automatic Repeat reQuest (HARQ) mechanism, which combines all the ARQ retransmissions, is located in the RU to a multi-RU transmission with an HARQ centralized in the CU. We show that multi-RU transmissions provide high reliability and low latency due to spatial diversity, even though centralization increases the round trip time. We then consider radio resource allocation. We evaluate the energy consumed by the BSs using a consumption model that integrates both the transmission power and the energy consumed for processing. At low load, multi-RU transmissions in a C-RAN, where all RUs serve one user, save BS energy consumption, without coverage degradation, compared to serving a user with a single RU. We pose and solve an optimization problem to minimize the energy consumptionand increase the capacity to moderate load by reusing radio resources between RUs.; Les réseaux mobiles de cinquième génération (5G) ouvrent la voie à une nouvelle architecture de réseau d’accès radio (RAN). Il s’agit du RAN centralisé (C-RAN) qui regroupe certaines des fonctions de la station de base (BS) dans une unité centrale (CU) connectée à des unités radio (RU) distribuées sur différents sites où sont implémentées les fonctions restantes de la BS. Cette thèse étudie comment tirer parti du C-RAN pour concilier haute fiabilité et faible latence d’une part et pour minimiser la consommation d’énergie de la BS d’autre part. Les transmissions mono et multi-RU, ainsi qu’un mélange des deux, sont évaluées. Nous comparons une approche mono-RU où le mécanisme de retransmission HARQ, qui combine toutes les retransmissions ARQ, est situé dans le RU à une transmission multi-RU avec un HARQ centralisé dans le CU. Nous montrons que les transmissions multi-RU offrent une fiabilité élevée et une faible latence grâce à la diversité spatiale même si la centralisation augmente le temps aller-retour. Nous considérons ensuite l’allocation de ressources radios. Nous évaluons l’énergie consommée par les BSs par un modèle de consommation qui intègre la puissance de transmission et l’énergie consommée pour le traitement. À faible charge, les transmissions multi-RU dans un C-RAN, où toutes les RUs servent un utilisateur, économisent la consommation d’énergie des BSs, sans dégrader la couverture, par rapport à la desserte d’un utilisateur avec une seule RU. Nous posons et résolvons un problème d’optimisation pour minimiser la consommation d’énergie et augmenter la capacité du système à une charge modérée en réutilisant les ressources radio entre les RUs.
- Published
- 2023
39. Validación de la Escala de Autoeficacia para el Afrontamiento del Estrés en estudiantes universitarios.
- Author
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Pereyra Girardi, Carolina Iris, Páez Vargas, Natalia, del Valle Ronchieri Pardo, Carla, and Agustina Trueba, Daniela
- Abstract
The aim of this study is to examine evidence of content and face validity, construct validity, the internal consistency of the dimensions that compose the instrument, and concurrent validity. The sample included 333 students from a private Argentine university. Content and face validity was carried out by expert judges and a pilot test. Subsequently, a confirmatory factor analysis was carried out, comparing two factor models of first and second order. The results showed a proper adjustment of the first-order factor model, adequate internal consistency and evidence of concurrent validity. These results are discussed using the two dominant conceptions of self-efficacy. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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40. Performance Assessment of Water Delivery and Distribution in Som Kamla Amba Irrigation Scheme.
- Author
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Sharma, Upma, Kothari, Mahesh, and Dashora, Yogita
- Subjects
IRRIGATION ,AGRICULTURAL water supply ,CANALS ,FOOD production ,WATER efficiency - Abstract
Copyright of Irrigation & Drainage is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
41. Test-retest reliability and convergent validity of the Ruffier Index in children under 12 years old.
- Author
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Ayán Pérez, C., Reigosa Galáns, F., Cancela Carral, J.M., Rodríguez Barreiro, H., and Martínez-Lemos, I.
- Subjects
- *
TEST validity , *OXYGEN consumption , *TEST theory , *TEST reliability , *CONFIDENCE testing - Abstract
Summary Objective This study aimed at identifying the test-retest reliability and convergent validity of the Ruffier Index (RI) when performed by children. Methods A total of 352 6/11/2018participants (mean age: 10.41 ± 1.02 years; 47.2% girls) carried out the Ruffier test twice with an interval of one week between both evaluations, to identify the RI test-retest reliability. The maximal oxygen consumption as estimated by the Course-Navette test was used to determine its convergent validity. Results The RI showed a "poor" test-retest reliability (ICC = 0.43–0.64). The relationship between RI and estimated maximal oxygen consumption was "acceptable" for both the test (r = −0.37; P = 0.003) and retest (r = −0.32; P = 0.01) in the girls' case, while for the boys it was "poor" (r = −0.12; P = 0.04 and r = −0.25; P = 0.02). Conclusion The findings of this study indicate that the RI shows a "poor" test-retest reliability and a convergent validity ranging from "acceptable" to "poor", when administered to children under 12 years of age. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
42. ntroduction des items inversés dans les échelles de mesure: Application à l’échelle du partage des connaissances
- Author
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BOUKHARI Sanaa
- Subjects
tems inversés ,echelle de mesure ,partage des connaissances ,validité ,fiabilité ,Management. Industrial management ,HD28-70 ,Marketing. Distribution of products ,HF5410-5417.5 - Abstract
Cette recherche a pour objectif de discuter l‟intérêt de l‟utilisation des items inversés dans une échelle de mesure. La variable Partage des connaissances a été prise comme cas d‟application. L‟étude des qualités psychométriques de celles-ci, menée sur un échantillon de 383 collaborateurs appartenant à deux grandes entreprises, a montré que cette échelle présente une validité et une fiabilité satisfaisantes. Toutefois, les deux items inversés initialement introduits ont été supprimés lors des analyses factorielles exploratoires. Ce résultat sera discuté dans le cadre de ce travail.
- Published
- 2016
43. Analyse, valorisation et protection des réseaux pair-à-pair de blockchains publiques
- Author
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Eisenbarth, Jean-Philippe, Resilience and Elasticity for Security and ScalabiliTy of dynamic networked systems (RESIST), Inria Nancy - Grand Est, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Department of Networks, Systems and Services (LORIA - NSS), Laboratoire Lorrain de Recherche en Informatique et ses Applications (LORIA), Institut National de Recherche en Informatique et en Automatique (Inria)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche en Informatique et en Automatique (Inria)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire Lorrain de Recherche en Informatique et ses Applications (LORIA), Institut National de Recherche en Informatique et en Automatique (Inria)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Université de Lorraine, Olivier Perrin, and Thibault Cholez
- Subjects
Ethereum ,[INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI] ,Blockchain ,Fiabilité ,Réseau P2P ,[INFO]Computer Science [cs] ,P2P network ,Reliability ,Bitcoin - Abstract
Blockchains rely on P2P networks that are essential to their proper functioning, as they ensure the dissemination of transactions and blocks to all parties.While Bitcoin and Ethereum - the two main public blockchains - are now worth trillions of dollars, attracting new users every day, few studies focus on the network aspects, although the literature shows that many problems can reduce the reliability of public P2P networks.In this thesis, we first focused on the monitoring of the P2P networks of the Bitcoin and Ethereum blockchains.We implemented a crawler for each network able to discover all connected peers and analyzed data from several months of measurement campaigns.Different criteria that can affect the reliability of the network were studied, such as the number of peers, their geographical distribution, their distribution over the IP network, the churn, the proportion of clients with known vulnerabilities, the existence of daily connection patterns or the ability to infer topology. It appears that both networks show good properties on all these points.Starting from the observation that, on the one hand, the Ethereum P2P network based on a distributed hash table (DHT) is largely untapped, as no data is stored in the DHT, and on the other hand, thestorage of the blockchain data is only growing (which will eventually be problematic),we studied in a second time the data storage of the main client of Ethereum(Geth) and its way of synchronizing the state of the blockchain between the peers. We have designeda new distributed storage architecture for Ethereum taking advantage of the DHT, backward compatible with the current clients and able to reduce the disk space, used for long-term storage, by 95% (58% of the total storage) without impacting the guarantees or the performances of the Ethereum blockchain.However, storing data on the DHT makes it more prone to attacks, especially Sybil attacks.We therefore analyzed Ethereum peers for patterns that could reflect Sybil attacks and showed the existence of thousands of suspicious nodes grouping many identifiers for a single IP address (up to 10000/IP).We finally designed and implemented a protection architecture against Sybil attacks. It is based on a crawler detecting suspicious nodes in real time, a smart contract structuring the information and distributing it to all peers, and finally a fully-distributed revocation system, each peer noticing itself the attack and removing its connections.The deployment on an Ethereum test network has shown the effectiveness of the proposed architecture.; Les blockchains reposent sur des réseaux P2P essentiels à leur bon fonctionnement puisqu'ils assurent la dissémination des transactions et des blocs à l'ensemble des parties. Alors que Bitcoin et Ethereum - les deux principales blockchains publiques - capitalisent aujourd'hui des milliers de milliards de dollars, attirant chaque jour de nouveaux utilisateurs, peu d'études s'intéressent aux aspects réseau bien que la littérature montre que de nombreux problèmes peuvent réduire la fiabilité des réseaux P2P publics. Dans cette thèse, nous nous sommes intéressés dans un premier temps à la supervision des réseaux P2P des blockchains Bitcoin et Ethereum. Nous avons implanté un crawler pour chaque réseau capable de découvrir tous les pairs connectés et avons analysé les données issues de campagnes de mesure de plusieurs mois. Différents critères pouvant affecter la fiabilité du réseau ont été étudiés, tels que le nombre de pairs, leur distribution du point de vue géographique ou du réseau IP, leur taux d'attrition, la proportion de clients aux vulnérabilités connues, l'existence de motifs journaliers de connexion ou encore la capacité d'inférer la topologie. Il apparaît que les deux réseaux montrent de bonnes propriétés sur tous ces points. Partant du constat que, d'une part, le réseau P2P d'Ethereum basé sur une table de hachage distribuée (DHT) est largement inexploité, car aucune donnée n'est stockée dans la DHT, et que, d'autre part, le stockage des données de la blockchain ne fait que croître (ce qui posera des problèmes à terme), nous avons étudié dans un second temps le stockage des données du principal client d'Ethereum (Geth) et sa manière de synchroniser l'état de la blockchain entre les pairs. Nous avons conçu une nouvelle architecture distribuée de stockage pour Ethereum tirant parti de la DHT, rétrocompatible avec les clients actuels et pouvant réduire l'espace disque, utilisé pour le stockage long terme, de 95% (58% du stockage total) sans impact sur les garanties ou les performances de la blockchain Ethereum. Le stockage des données sur la DHT la rend cependant plus intéressante à attaquer, en particulier par des attaques Sybil localisées. Nous avons donc analysé les pairs d'Ethereum à la recherche de motifs pouvant traduire des attaques Sybil et montré l'existence de milliers de nœuds suspects regroupant un grand nombre d'identifiants pour une même adresse IP (jusqu'à 10000/IP). Nous avons finalement conçu et implanté une architecture de protection contre les attaques Sybils. Celle-ci se base sur un crawler détectant les nœuds suspects en temps réel, un smart contract structurant l'information et la distribuant à tous les pairs, et enfin une révocation complètement distribuée, chaque pair constatant lui-même l'attaque et coupant ses connexions aux nœuds Sybils. La mise en œuvre sur un réseau de test Ethereum a montré l'efficacité de l'architecture proposée.
- Published
- 2022
44. Conception temps réel et fiable pour les systèmes embarqués critiques en matière de sécurité
- Author
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Kritikakou, Angeliki, Architectures matérielles spécialisées pour l’ère post loi-de-Moore (TARAN), Inria Rennes – Bretagne Atlantique, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-ARCHITECTURE (IRISA-D3), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Rennes 1, and Olivier Sentieys
- Subjects
Reliabilility ,Task schedulling ,Vulnerability analysis and countermeasures ,Fiabilité ,[INFO.INFO-ES]Computer Science [cs]/Embedded Systems ,Multicores and many-cores ,Multicores et many-cores ,Real-time ,Analyse des vulnérabilités et contre-mesures ,Ordonnancement des tâches ,Temps réel - Published
- 2022
45. Modèle paramétrique pour estimer la dégradation de la fiabilité de démarrage d’une turbine à gaz à partir de données d’essais
- Author
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Asoyan, Artashes, Bondivenne, Eric, Couellan, Nicolas, Humbert, Sophie, Klein, Thierry, Safran Helicopter Engines, Ecole Nationale de l'Aviation Civile (ENAC), Institut de Mathématiques de Toulouse UMR5219 (IMT), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[STAT]Statistics [stat] ,modèle paramétrique de dégradation ,maximum de vraisemblance ,données d’essais ,probit ,fiabilité ,[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] ,robustesse - Abstract
National audience; L’objectif de cette étude est d’estimer la probabilité de démarrage d’un turbomoteur en tout point de l’espace des facteurs jugés influents. En l’absence de modèle physique du démarrage et de nombre limité de données, une méthode générale d’estimation de la probabilité de démarrage à travers un modèle de dégradation paramétrique est proposée. Le modèle est régi par la distance à un point où la probabilité de démarrage est 1. La sélection du modèle revient à estimer la matrice définissant la distance dans l’espace des facteurs influents. Cette matrice est estimée par maximum de vraisemblance. Une application industrielle à partir des données d’essais de turbomoteur d’hélicoptère est présentée. Les résultats numériques sont prometteurs mais ont montré qu’il est nécessaire de considérer une classe plus générique de modèle. Enfin à travers une étude de robustesse, le modèle a aussi montré une stabilité à des faibles perturbations des données d’essais.
- Published
- 2022
46. Mesurer les attitudes des enseignants vis-à-vis de l’intégration scolaire : qualités psychométriques de la version française de l’échelle Opinions Relative to Integration of Students with Disabilities (ORI) : Opinions relatives à l’intégration d’élèves ayant des besoins éducatifs particuliers (ORI-f)
- Author
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Valérie Benoit and Marjorie Valls
- Subjects
intégration ,scolaire ,inclusion scolaire ,enseignants ,validité structurelle ,fiabilité ,inclusive education ,attitude scale ,teachers ,construct validity ,reliability ,integração escolar ,inclusão escolar ,escala de atitudes ,professores ,validade estrutural ,fiabilidade ,Education - Abstract
Les échelles permettant de mesurer les attitudes des enseignants vis-à-vis de l’intégration scolaire disponibles en français sont rares. Cet article a pour but de présenter la validité structurelle et la fiabilité de la version française de l’échelle nord-américaine Opinions Relative to Integration of Students with Disabilities (ORI ; Antonak et Larrivee, 1995). Des analyses factorielles confirmatoires et exploratoires ont été menées à partir des réponses de 306 enseignants de classe ordinaire d’un canton suisse. Les indices de la qualité d’ajustement indiquent que les modèles issus des analyses factorielles exploratoires représentent mieux les données récoltées que ne le font les modèles originaux. En conséquence, de légères différences structurelles avec l’échelle originale s’observent. Les indices de cohérence interne sont acceptables (de 0,68 à 0,91). L’échelle ORI traduite en français représente un instrument de mesure valable pour répondre aux questions de recherche relatives à l’intégration scolaire dans les pays francophones.
- Published
- 2018
- Full Text
- View/download PDF
47. Tactical planning of reliable supply chain
- Abstract
Global competition, rapid technological evolution, increasing complexity and demand volatility are creating a new and difficult competitive environment for manufacturing enterprise. In this environment, reliability, timely delivery, enhanced customer service and cost reduction are well acknowledge sources of competitive advantage. The literature on supply-chain briefly addresses the problem of designing reliable supply chain, which in today’s world is a key to success. This research presents a mixed integer-programming model used to design reliable make-to-order virtual supply chains evolving in highly dynamic environments. The model takes into account the reliability of all constituents of the supply chain and solves complex cost-time-reliability trade offs. An illustrative example is provided.
- Published
- 2022
48. Conception des réseaux logistiques : mesure de fiabilité et planification d'accélérateurs
- Abstract
Dans le domaine de la production manufacturière, il est maintenant largement reconnu que l'unité compétitive dépasse l'entreprise pour se concentrer sur l'ensemble du réseau logistique. Ainsi, les entreprises ne sont plus directement en compétition entre elles, mais plutôt par l'intermédiaire des divers réseaux logistiques auxquelles elles appartiennent, impliquant ainsi chaque relation client-fournisseur depuis le fournisseur du fournisseur jusqu'au client du client. De plus en plus de travaux de recherche se concentrent sur l'amélioration de la performance globale des réseaux de production et de distribution à travers le concepts de supply chain management. Dans le cadre de cette problématique, cet article présente dans un premier temps le contexte industriel, puis un ensemble de travaux sur la mesure de la fiabilité des réseaux manufacturiers et logistiques, suivi de l'amélioration de la fiabilité de ces réseaux par des mécanismes d'accélération, puis finalement de l'apport de la simulation dans l'évaluation de la fiabilité. Cet article se terminera par la présentation d'un exemple de réseau manufacturier. La fiabilité que nous étudions ici concerne les retards de livraison ainsi que le respect des volumes livrés.
- Published
- 2022
49. Étude du contact électromécanique Au−Ru/AlCu pour les MEMS RF ohmiques : modélisation, intégration et caractérisation
- Abstract
Aujourd'hui les systèmes de télécommunication sont le plus souvent construits à partir (i) d'électronique à l'état solide utilisant la technologie des semi-conducteurs telles les diodes PIN et les transistors FET ou (ii) de relais électromagnétiques. Chacune de ces technologies offre un compromis entre la fréquence d'opération, la linéarité, la capacité à transporter la puissance RF, les pertes d'insertion, l'isolation, le temps de commutation, la consommation électrique, la fiabilité, l'intégration à grande échelle, la masse et le coût. Par ailleurs, le besoin d'opérer à hautes fréquences est plus marqué avec l'arrivée de la 5G. Les MEMS RF sont à priori adaptés pour répondre aux nombreux défis des nouvelles générations de systèmes de télécommunication, cependant le principal obstacle reste leur fiabilité. Cette thèse s'inscrit dans un contexte d'amélioration des performances et de la fiabilité des micro-commutateurs MEMS RF à contact ohmique. L'encapsulation des MEMS RF aux niveau du wafer est nécessaire pour leur intégration dans des systèmes plus complets telles les matrices de commutations et les antennes configurables. En plus de permettre un contrôle de l'environnement directe du MEMS, la solution d'encapsulation ne doit pas altérer les performances RF du composant. La fiabilité du contact électromécanique est l'une des limitations majeures intrinsèques des MEMS RF ohmiques. Le contact Au-Ru/AlCu est proposé comme une configuration compatible avec un procédé MEMS intégrant une étape d'encapsulation au niveau du wafer par collage eutectique Al-Ge. L'utilisation d'un contact Au-Ru permet de réduire les forces d'adhésion et le transfert de matière en comparaison de l'utilisation d'une paire de contact symétrique de métaux nobles. Par ailleurs, l'empilement Ru/AlCu assure une résistivité totale proche de celle de l'AlCu tout en bénéficiant des propriétés avantageuses du Ru à l'interface de contact. Une étude fondamentale du contact électromécanique rugueux pour l
- Published
- 2022
50. Conception des réseaux logistiques : mesure de fiabilité et planification d'accélérateurs
- Abstract
Dans le domaine de la production manufacturière, il est maintenant largement reconnu que l'unité compétitive dépasse l'entreprise pour se concentrer sur l'ensemble du réseau logistique. Ainsi, les entreprises ne sont plus directement en compétition entre elles, mais plutôt par l'intermédiaire des divers réseaux logistiques auxquelles elles appartiennent, impliquant ainsi chaque relation client-fournisseur depuis le fournisseur du fournisseur jusqu'au client du client. De plus en plus de travaux de recherche se concentrent sur l'amélioration de la performance globale des réseaux de production et de distribution à travers le concepts de supply chain management. Dans le cadre de cette problématique, cet article présente dans un premier temps le contexte industriel, puis un ensemble de travaux sur la mesure de la fiabilité des réseaux manufacturiers et logistiques, suivi de l'amélioration de la fiabilité de ces réseaux par des mécanismes d'accélération, puis finalement de l'apport de la simulation dans l'évaluation de la fiabilité. Cet article se terminera par la présentation d'un exemple de réseau manufacturier. La fiabilité que nous étudions ici concerne les retards de livraison ainsi que le respect des volumes livrés.
- Published
- 2022
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