Search results for "Arity"
showing 10 items of 2893 documents
A 3D Scanner for Transparent Glass
2009
Many practical tasks in industry, such as automatic inspection or robot vision, often require the scanning of three-dimensional shapes by use of non-contact techniques. However, few methods have been proposed to measure three-dimensional shapes of transparent objects because of the difficulty of dealing with transparency and specularity of the surface. This paper presents a 3D scanner for transparent glass objects based on Scanning From Heating (SFH), a new method that makes use of local surface heating and thermal imaging.
Dispersion relation bounds forππscattering
2008
Axiomatic principles such as analyticity, unitarity, and crossing symmetry constrain the second derivative of the $\ensuremath{\pi}\ensuremath{\pi}$ scattering amplitudes in some channels to be positive in a region of the Mandelstam plane. Since this region lies in the domain of validity of chiral perturbation theory, we can use these positivity conditions to bound linear combinations of ${\overline{l}}_{1}$ and ${\overline{l}}_{2}$. We compare our predictions with those derived previously in the literature using similar methods. We compute the one-loop $\ensuremath{\pi}\ensuremath{\pi}$ scattering amplitude in the linear sigma model (LSM) using the $\overline{\mathrm{MS}}$ scheme, a result…
Reporting Empirical Research in Global Software Engineering: A Classification Scheme
2008
Increased popularity of global software engineering (GSE) has resulted in quite a number of research and industrial studies. As the area matures, an increased focus on empirically supported results leads to a greater potential impact on future research and industrial practice. However, since GSE scenarios are diverse, what works in one context might not directly apply in another. Thus it is necessary to understand, how GSE-related empirical findings should be reported to be useful for practitioners and researchers. Furthermore, itdasias important to summarize progress and get the big picture of published research to identify gaps and commonalities. In this paper we analyze differentiating f…
Effects of school climate and teacher self-efficacy on job satisfaction of mostly STEM teachers: a structural multigroup invariance approach
2020
Abstract Background Identification and retention of effective teachers in STEM education play cardinal roles in teacher recruitment exercises worldwide. Studies on factors that characterize effective teachers have therefore gained popularity in recent times. Teacher self-efficacy, job satisfaction and school climate are among other factors that have attracted global attention. Thus, proper understanding of the relations between these factors is equally important. The purpose of this study is to validate and cross-validate a model of direct/indirect effects of school climate and teacher self-efficacy on job satisfaction. Results The data used for the current study are extracted from a public…
Efectos de la similitud superficial y estructural sobre la transferencia a partir de análogos en problemas de alta y baja familiaridad : primeros res…
2013
Se desarrollan dos estudios exploratorios para analizar el éxito en la transferencia en resolución de problemas a partir de análogos. Las diferentes analogías entre problemas «ejemplo» y «propuestos » se suponen construidas a partir de dos variables: la superficie y la estructura. Los resultados muestran que cuando los contextos de los problemas son familiares para los estudiantes, las analogías superficiales pueden ocultar las diferencias estructurales. Sin embargo, cuando los contextos de los problemas son no familiares para los estudiantes, el único efecto significativo procede de la igualdad/diferencia estructural. El efecto global de la familiaridad de los problemas es una reducción si…
Knowledge exchange through science diplomacy to assist disaster risk reduction
2021
Abstract This paper analyses science diplomacy efforts to reduce disaster risks and proposes establishing national knowledge exchange centers (KECs) to help individual states adhere to their Sendai Framework goals. KECs are considered to be interconnected globally and work together to promote resilience efforts by facilitating sharing of information and strategies in risk monitoring, assessment, and ultimately reduction across the globe. KECs can provide high-quality scientific evidence for informed decisionmaking along with a component related to disaster science media to ensure that appropriate knowledge reaches a variety of people who need it in different forms tailored for them. KECs ca…
IRSp53 controls plasma membrane shape and polarized transport at the nascent lumen in epithelial tubules.
2020
It is unclear whether the establishment of apical–basal cell polarity during the generation of epithelial lumens requires molecules acting at the plasma membrane/actin interface. Here, we show that the I-BAR-containing IRSp53 protein controls lumen formation and the positioning of the polarity determinants aPKC and podocalyxin. Molecularly, IRSp53 acts by regulating the localization and activity of the small GTPase RAB35, and by interacting with the actin capping protein EPS8. Using correlative light and electron microscopy, we further show that IRSp53 ensures the shape and continuity of the opposing plasma membrane of two daughter cells, leading to the formation of a single apical lumen. G…
The Essence of Dynamic Capabilities and their Measurement
2016
The growing popularity of explaining firm performance through dynamic capabilities has motivated plenty of conceptual development in the field. However, empirical approaches to measuring dynamic capabilities have so far not been under comprehensive scrutiny. The authors; purpose is to assess the extent to which different ways of measuring dynamic capabilities in quantitative studies correspond to the theoretical essence of the concept, and develop recommendations for future research. They find that four types of operationalizations have been used: (1) managers’ evaluations; (2) financial data; (3) company's experience, actions and performance; and (4) managers’ or employees’ experience, act…
Enseñanza de las ciencias : revista de investigación y experiencias didácticas
2021
Se expone el proceso seguido por un equipo de docentes de secundaria con el objetivo de cambiar la metodología de trabajo en el aula mediante el diseño y aplicación de una secuencia de aprendizaje definida a partir del aprendizaje basado en retos que integre de manera interdisciplinar los contenidos de Biología y Geografía en segundo de la ESO. Mediante la reflexión didáctica compartida, organizada y continuada se transforma una salida de campo tradicional en un nuevo proyecto de trabajo que se desarrolla a lo largo de un trimestre completo. Los resultados muestran la nueva secuencia de actividades creada, la percepción de los estudiantes y familias y los beneficios en la implicación del al…
The Usage of Quadtree in Deep Neural Networks to Represent Data For Navigation From a Monocular Camera
2022
Depth acquisition represents a key element for navigation tasks. It is, therefore, one of the major research topics in computer vision. Many approaches have been developed to address this problem by constructing the depth from series of images. However, there is a minimal case proposing a prediction from a single image, made possible with the emergence of deep learning approaches. The latter makes it possible to consider a reduction in both hardware and computing time costs, which is beneficial for embedded systems. However, network architecture remains a heavy process requiring a lot of GPU memory. Few approaches have proposed addressing this problem by developing lightweight architectures…