Daily natural heat convection in a historical hall     

Carla Balocco   《Journal of Cultural Heritage》2007,8(4):370-376

The use of numerical simulation methods for the Cultural Heritage is of increasing importance for the analysis, conservation, restoration and appreciation of works of art. This is particularly important when their preservation and planned maintenance is the primary aim. Today museums, and particularly historical buildings converted to museums, should be considered as places where precious artefacts should have first-rate protection and conservation. It is a question of solving the compromise between protection, conservation and comfort for works of art and/or visitors, with the consequence that preservation and planned maintenance criteria must prevail over use requirements. Refurbishment and conservation of a building, and requirements for visitor presence and works of art need different thermo-physical indoor parameter values. The present paper concerns the thermal and air velocity analysis of the Salone dei Duecento (the Hall of the Two Hundred of the Palazzo Vecchio (Old Palace)) in Florence. In this paper an appropriate transient 3D model by Computational Fluid Dynamics (CFD) software based on the finite element method (FEM) was used. Variations and interaction between indoor and outdoor microclimatic conditions, and thermo-physical behaviour of the building connected to lighting, visitor presence and cooling–heating fan coils system were considered. The 3D modelling method provided by the present paper can be applied to several situations where there is interaction between outdoor and indoor climate variations and the building structure. It can be very useful for defining measures to preserve tapestries, understanding deterioration processes, and developing new conservation techniques and strategies for care and exhibition.  相似文献   

Muscle Dysmorphia Among College Men: An Emerging Gender‐Related Counseling Concern     

Carla M. Davey  John B. Bishop 《Journal of College Counseling》2006,9(2):171-180

Recent literature suggests that, like midrange eating disorders among college women, male muscle dysmorphia is emerging as a physical as well as a health concern among college men. The authors define the disorder, review diagnostic and etiological considerations, and discuss the added complication of creatine use to self‐manage muscle dysmorphic symptoms. Implications for the college counseling practice are presented, and the need for a reliable knowledge base to guide practice is emphasized.  相似文献   

Comparability in Balanced Assessment Systems for State Accountability          下载免费PDF全文

Carla M. Evans  Susan Lyons 《Educational Measurement》2017,36(3):24-34

The purpose of this study was to test methods that strengthen the comparability claims about annual determinations of student proficiency in English language arts, math, and science (Grades 3–12) in the New Hampshire Performance Assessment of Competency Education (NH PACE) pilot project. First, we examined the literature in order to define comparability outside the bounds of strict score interchangeability and explored methods for estimating comparability that support a balanced assessment system for state accountability such as the NH PACE pilot. Second, we applied two strategies—consensus scoring and a rank‐ordering method—to estimate comparability in Year 1 of the NH PACE pilot based upon the expert judgment of 85 teachers using 396 student work samples. We found the methods were effective for providing evidence of comparability and also detecting when threats to comparability were present. The evidence did not indicate meaningful differences in district average scoring and therefore did not support adjustments to district‐level cut scores used to create annual determinations. The article concludes with a discussion of the technical challenges and opportunities associated with innovative, balanced assessment systems in an accountability context.  相似文献   

An exploration of arts teachers' beliefs and judgements concerning students with SEND     

Beccy Thompson  Carla Finesilver  Jane Jones 《Support for Learning》2023,38(2):83-97

There is little research addressing teachers' beliefs and judgements concerning students with identified Special Educational Needs and/or Disabilities (SEND), a group which is regularly cited as experiencing disadvantages in their schooling compared to peers. This paper draws on research which examined the beliefs and judgements of a set of arts teachers in an English secondary school regarding their students with SEND. Data were collected using observation, semi-structured and stimulated recall interviews. Phenomenological analysis uncovered patterns of tension in these beliefs and judgements. Teachers were able to consider some of the interactions between their students' individual characteristics and the classroom environment, and the ways these might give rise to certain educational needs; they also believed their subjects were singularly inclusive in providing for diverse needs. Nonetheless, traditional systems of educational assessment significantly affected what is judged ‘successful’ learning, which teachers tended to negatively associate with SEND. We conclude that deficit thinking about the educational capacities of students with SEND underlies teachers' judgements. Nevertheless, teachers do believe there are many ways for students to participate meaningfully, articulate and demonstrate understanding in arts subjects, which have the potential to challenge traditional notions of ‘success’.  相似文献   

Kinematic differences between front crawl sprint and distance swimmers at sprint pace     

McCabe CB  Psycharakis S  Sanders R 《Journal of sports sciences》2011,29(2):115-123

The purpose of this study was to use three-dimensional methods to determine whether there are distinct kinematic differences between sprint and distance front crawl swimmers when swimming at a sprint pace. Seven sprint and eight distance specialists performed four 25-m sprints through a 6.75-m(3) calibrated space recorded by six gen-locked cameras. The variables of interest were: average swim velocity, stroke length, stroke frequency, upper limb and foot displacement, elbow angle, shoulder and hip roll angles, duration of stroke phases, and the time corresponding to particular events within the stroke cycle relative to hand entry. Differences between sprint and distance swimmers were assessed with an independent t-test for each variable, in addition to effect size calculations. Differences between sprint and distance front crawl swimmers were generally small and not significant when swimming at a sprint pace. Differences were limited to temporal aspects of the stroke cycle. These findings suggest that coaches should not train sprint and distance specialists differently in terms of technique development.  相似文献   

Asymmetry of red blood cell motions in a microchannel with a diverging and converging bifurcation     

Leble V  Lima R  Dias R  Fernandes C  Ishikawa T  Imai Y  Yamaguchi T 《Biomicrofluidics》2011,5(4):44120-4412015

In microcirculation, red blood cells (RBCs) flowing through bifurcations may deform considerably due to combination of different phenomena that happen at the micro-scale level, such as: attraction effect, high shear, and extensional stress, all of which may influence the rheological properties and flow behavior of blood. Thus, it is important to investigate in detail the behavior of blood flow occurring at both bifurcations and confluences. In the present paper, by using a micro-PTV system, we investigated the variations of velocity profiles of two working fluids flowing through diverging and converging bifurcations, human red blood cells suspended in dextran 40 with about 14% of hematocrit level (14 Hct) and pure water seeded with fluorescent trace particles. All the measurements were performed in the center plane of rectangular microchannels using a constant flow rate of about 3.0 × 10⁻¹² m³/s. Moreover, the experimental data was compared with numerical results obtained for Newtonian incompressible fluid. The behavior of RBCs was asymmetric at the divergent and convergent side of the geometry, whereas the velocities of tracer particles suspended in pure water were symmetric and well described by numerical simulation. The formation of a red cell-depleted zone immediately downstream of the apex of the converging bifurcation was observed and its effect on velocity profiles of RBCs flow has been investigated. Conversely, a cell-depleted region was not formed around the apex of the diverging bifurcation and as a result the adhesion of RBCs to the wall surface was enhanced in this region.  相似文献   

Conceptual learning in relation to near and far transfer in the secondary school subject of economics     

Lenie Kneppers  Marianne Elshout-Mohr  Carla van Boxtel  Bernadette van Hout-Wolters 《European Journal of Psychology of Education - EJPE》2007,22(2):115-129

In this study we investigated the effects of two treatments supplementing students’ (16 to 18 years of age and in pre-university education) regular course in economics. One treatment, labelled concept treatment, aimed at the solidification of the students’ knowledge about economic concepts and their interrelations. The other treatment, labeled context treatment, aimed at the solidification of the connections between economic concepts and practical contexts. The aim of the study was to find out which treatment was most effective in meeting two demands that have been made by educators and advisory boards. The first demand is that students should gain competence in analysing practical problems from an economic perspective. The second demand is that students should be prepared for transfer of what they learned in the lessons to problems that are new to them.  相似文献   

Histories of Colorism and Implications for Education     

Verna M. Keith  Carla R. Monroe 《理论付诸实践》2016,55(1):4-10

In this article, we consider how colorist ideologies and practices unsettle arguments that celebrate racial gains in education, particularly as related to divides that have narrowed since the Civil Rights Movement of the 1950s and 1960s. Although outcomes based on race may document some general paths of improvement, progress and success can be appreciably uneven across people who are the same race. Even though skin tone is a linchpin of intraracial disparities, connections between colorism and educational outcomes are underappreciated. A brief consideration of how color-based advantages and disadvantages may affect African-, Latino/a-, and Asian-descended groups is provided to heighten educators' awareness of the problem.  相似文献   

Developing a ‘big picture’: Effects of collaborative construction of multimodal representations in history     

Maaike E. Prangsma  Carla A. M. Van Boxtel  Gellof Kanselaar 《Instructional Science》2008,36(2):117-136

Many pupils have difficulties with the abstract verbal information in history lessons. In this study we assessed the value of active construction of multimodal representations of historical phenomena. In an experimental study we compared the learning outcomes of pupils who co-constructed textual representations, visual-textual representations, or visual-textual representations integrated in a timeline. 85 pupils in pre-vocational secondary education, aged 12–13, worked in dyads on a series of four history tasks. All pupils took a pre-test, post-test and retention test. Results show that working on visual-textual representations integrated in a timeline leads to higher short-term results than co-constructing textual representations. Dialogue analyses for two dyads working in the condition with visual-textual representations integrated in a timeline indicate that the extent to which pupils verbally integrate textual and visual information differs for the four different tasks.  相似文献   

Augmented Reality Application for Handheld Devices     

Falomo Bernarduzzi  Lidia  Bernardi  Ester Maria  Ferrari  Alberto  Garbarino  Maria Carla  Vai  Andrea 《Science & Education》2021,30(3):755-773

Science & Education - The Pavia University History Museum, which houses historic items mainly connected to the physics and medicine fields, has focused in the past years on new ways to involve...  相似文献