1,721,415 research outputs found
Deriving safety constraints for integration of unmanned aircraft systems into the national airspace by application of STECA
No full textThesis: S.M. in Technology and Policy, Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, Technology and Policy Program, 2016.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 129-132).Unmanned aircraft systems (UAS) have been used for years especially in the military. However, the operation of UAS in civil aviation has been limited since there are a lot of uncertainties: a regulatory scheme needs to be established and associated technologies need to be developed. This thesis contributes to both technology development and establishing a regulatory scheme for UAS by generating safety constraints using the new methodology developed by Professor Leveson and Dr. Fleming. This methodology is called "'Systems-Theoretic Early Concept Analysis" (STECA) and is based on Systems-Theoretic Accident Model and Processes (STAMP) analysis, which is also developed by the professor. STECA has potential to generate more safety constraints that have not been considered otherwise in the early stage of development and this allows the producer to redesign the entire system with potentially less cost. This thesis illustrates why and how STECA can be powerful to support integration of UAS into NAS. In addition, this thesis actually demonstrates how STECA derives safety constraints as a case study and shows how the safety constraints should be integrated in the system development.by Yusuke Urano.S.M. in Technology and Polic
Measuring dispositional optimism in patients with chronic heart failure and their healthcare providers: the validity of the Life Orientation Test-Revised
Full text linkPatrizia Steca,1 Dario Monzani,1 Antonia Pierobon,2 Giulia Avvenuti,2 Andrea Greco,1 Anna Giardini2 1Department of Psychology, University of Milano – Bicocca, Milan, 2Psychology Unit, Istituti Clinici Scientifici Maugeri Spa SB, IRCCS Montescano, Montescano, Italy Abstract: The Life Orientation Test-Revised (LOT-R) measures dispositional optimism (DO) – an individual difference promoting physical and psychological well-being in healthy adults (HAs) as well as in patients with chronic heart failure (CHF) and healthcare providers (HPs). Controversy has arisen regarding the dimensionality of the LOT-R. Whereas DO was originally defined as a one-dimensional construct, empirical evidence suggests two correlated factors in the LOT-R. This study was the first attempt to identify the best factor structure of the LOT-R in patients with CHF and HPs and to evaluate its measurement invariance among subsamples of patients with CHF, HPs, and a normative sample of HAs. Its validity was also evaluated in patients with CHF. The sample comprised 543 participants (34% HAs; 34% HPs; and 32% CHF patients). Congeneric, two correlated factor, and two orthogonal factor models for the LOT-R were compared by performing confirmatory factor analysis (CFA). Measurement invariance was evaluated by considering differential item functioning (DIF) among subsamples of HPs, patients with CHF, and HAs. In patients with CHF, validity was assessed by considering associations with anxiety and depression. The CFA demonstrated the superior fit of the two orthogonal factor model. Moreover, across patients with CHF, HPs, and HAs, the results highlighted a minimal DIF with only trivial consequences. Finally, negative but weak correlations of DO with anxiety and depression confirmed the validity of the LOT-R in patients with CHF. In summary, these findings supported the validity and suitability of the LOT-R for the assessment of DO in patients with CHF, HPs, and HAs. Keywords: Life Orientation Test-Revised, dispositional optimism, validity, measurement equivalence, chronic heart failur
Dall’efficacia personale a quella collettiva: le percezioni di contesto (From personal to collective perceived efficacy: the role of context perceptions).
No full textAffective and social self- regulatory efficacy beliefs as determinants of positive thinking and happiness
No full textIl ruolo dell’autoefficacia percepita nella sfera emotiva come determinante del pensiero positivo nel corso di vita (The role of emotional self efficacy beliefs as determinants of positive thinking in the life span).
No full textThe Contribution of Self–Regulatory Efficacy Beliefs in Managing Affect and Family Relationships to Positive Thinking and Hedonic Balance
No full textМодернізація двовісного автономного сонячного трекеру з інтелектуальною системою на базі контролерів Steca та Arduino
No full textОписані переваги та недоліки сонячних панелей. Описані основні принципи побудови різних систем орієнтування сонячних панелей за Сонцем. Розрахована сонячна інсоляція для м. Суми. Проведено моделювання роботи системи геліотрекеру в середовищі TinkerCad. Проведено моделювання впливу температури на ККД панелі в програмному комплексі MatLab. Модернізований лабораторний двовісний автономний сонячний трекер з інтелектуальною системою на базі контроллерів Steca та Arduino
Prosocial agency: Values and self efficacy beliefs as determinants of prosocial behavior
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