Investigation of an Egyptian Mummy board by Using Clinical Multi-slice Computed Tomography

A modern approach to the diagnosis of artistic heritage makes use of non-destructive techniques which avoid damage to artworks or signs of interaction with the analytical technique used. For this reason, today, the employment of X-rays to study artistic heritage is quite widespread. Computed tomography (CT) Imaging was first used as specialized medical diagnostic tool in the early 1970s. Today, CT scanners have become more common, and non-destructive three-dimensional imaging has found an increasing number of uses in different areas such as materials research, geology, archaeology, and museum conservation. In this work, a new generation of clinical CT (based on the Dual Energy and multi-slice acquisition principle) is used to investigate an Egyptian wooden mummy board with a total acquisition time of 93.23 seconds and a voxel size of 0.078?×?0.078?×?1.5?mm. The use of two distinct techniques of image post-processing, the two-dimensional multi-planar reconstruction (MPR) and the three-dimensional volume rendering technique (VRT) allowed us to: evaluate the state of conservation of the mummy board, determine how the wooden object was implemented, recognize a nineteenth-century intervention of consolidation, and advance the hypothesis that the wooden planks were reused. In particular, we highlight the use of the cardiovascular and pulmonary filter with VRT reconstruction, which allows a virtual elimination of different parts of the mummy board to investigate those areas otherwise accessible only by removing parts of the board and thus damaging the work.     

Phenomenal permanence and the development of predictive tracking in infancy

The perceived spatiotemporal continuity of objects depends on the way they appear and disappear as they move in the spatial layout. This study investigated whether infants' predictive tracking of a briefly occluded object is sensitive to the manner by which the object disappears and reappears. Five-, 7-, and 9-month-old infants were shown a ball rolling across a visual scene and briefly disappearing via kinetic occlusion, instantaneous disappearance, implosion, or virtual occlusion. Three different measures converged to show that predictive tracking increased with age and that infants were most likely to anticipate the reappearance of the ball following kinetic occlusion. These results suggest that infants' knowledge of the permanence and nonpermanence of objects is embodied in their predictive tracking.     

Why do high jumpers use a curved approach?

Currently, all elite high jumpers use the Fosbury Flop technique with a curved approach. This suggests that the curved approach presents some clear advantage, although there is no general agreement upon the mechanism or the mechanics. This study aimed to determine the characteristics of the approach curve and to investigate how it contributes to the generation of somersault rotation. A simple theoretical model was used to demonstrate that a tightening approach curve would change the inward lean towards the centre of the curve into outwards lean. Three-dimensional video analysis was used to record the performances of two elite male high jumpers in competition. It was found that in each case the radius of the approach curve and the inward lean angle both decreased towards the end of the approach. The amount of outward lean angular velocity generated was shown to be a major proportion of the required somersault angular velocity for a jump. It was concluded that the main advantage of a curved approach was that it resulted in the generation of somersault velocity providing the curve tightened towards the end of the approach.     

How Can Student Success Support Teacher Self-Efficacy and Retention?

High-stakes testing has driven the way that educators deliver instruction. Historically, standardized testing has been in existence since the 1800s, but the impact of accountability was not recognized until the late 1970s. Science educators are trying to balance the requirements of state assessments with creative and meaningful curricula. Inquiry-based science instruction has led the way in assisting students in the process of discovering knowledge for themselves instead of simply being asked to recall information. Inquiry learning promotes creativity by increasing motivation, wonderment, and curiosity. The author proposes that inquiry is the key to enhancing creativity, while still meeting the demands of standardized testing.     

The effect of intellectual capital attributes on organizational performance. The case of the Bologna Opera House

In this study, we propose to model how intellectual capital (IC) attributes affect the performance of organizations operating in the performing arts sector, more specifically opera companies. In particular, the aim of this paper is twofold in that it seeks: (1) to analyze the role IC plays in performing arts organizations; and (2) to propose research hypotheses that suggest how IC affects the performance of these organizations. An in-depth qualitative approach was adopted. The research methodology deployed consists of a longitudinal case study of a major Italian opera house. The main findings of this study are two: (1) the identification of six attributes of IC that are deeply grounded in management theories and that make the definition of the IC construct more theoretically robust with respect to other studies that are less evidence-based; (2) the development of a model that shows how IC attributes affect the three different performance dimensions of performing arts organizations.     

A Supplementary DC Machine Test for Sophomores

A blocked-rotor test may be used to determine curves for a family of dynamic operating characteristics for dc machines. Conventional performance characteristics may be predicted from these curves. The authors have used this test procedure to supplement the usual tests on machinery in the sophomore laboratory. The new procedure emphasizes the fundamental principles of machine operation and also points up the importance of certain details which have a significant effect upon performance. The test would logically precede the usual load tests. The latter are then anticipated with enthusiasm since they provide confirmation of performance predicted from the static tests.     

Effectiveness of bibliographic searches performed by paediatric residents and interns assisted by librarians. A randomised controlled trial

Background: Considerable barriers still prevent paediatricians from successfully using information retrieval technology. Objectives: To verify whether the assistance of biomedical librarians significantly improves the outcomes of searches performed by paediatricians in biomedical databases using real‐life clinical scenarios. Methods: In a controlled trial at a paediatric teaching hospital, nine residents and interns were randomly allocated to an assisted search group and nine to a non‐assisted (control) group. Each participant searched Pub Med and other online sources, performing pre‐determined tasks including the formulation of a clinical question, retrieval and selection of bibliographic records. In the assisted group, participants were supported by a librarian with ≥5 years of experience. The primary outcome was the success of search sessions, scored against a specific assessment tool. Results: The median score of the assisted group was 73.6 points interquartile range (IQR = 13.4) vs. 50.4 (IQR = 17.1) of the control group. The difference between median values in the results was 23.2 points (95% CI 4.8–33.2), in favour of the assisted group (P‐value, Mann–Whitney U test: 0.013). Conclusions: The study has found quantitative evidence of a significant difference in search performance between paediatric residents or interns assisted by a librarian and those searching the literature alone.