Environmentally-induced stone decay: the cumulative effects of crystallization–hydration cycles on a Lincolnshire oopelsparite limestone     

Belinda J. Colston  David S. Watt  Helen L. Munro   《Journal of Cultural Heritage》2001,2(4)

An investigation has been undertaken at St Andrew’s church, Walpole St Andrew, Norfolk, to establish the underlying causes of the observed stone decay to the upper parts of the six stone piers. The stone decay was first recorded in the early 1930s. The salt-contaminated masonry within the church has been shown to undergo severe salt decay during the summer, with little damage occurring over the winter months. The south aisle piers have been shown to decay 2.5 times faster than the north aisle piers. Although crystallization–hydration cycles have been identified, the rate of decay is at its greatest when the cycling is relatively infrequent. This was not the expected trend. Furthermore, it has been shown that during extended periods where the ambient relative humidity is less than 75%, the rate of decay reaches a maximum. It is the length of this ‘drying’ period that apparently has the greatest influence on the rate of decay and could explain the significant difference in the rate of decay between the south and north aisle piers. The results have serious implications for passive conservation, where it is often recommended to lower the ambient relative humidity to well below the equilibrium relative humidity of the salt contaminant, to avoid crystallization–hydration cycles. Since, at the time of building, the church was situated on the coast, it is possible that the sodium chloride contamination occurred during the building process (1440–1520), particularly since the area was prone to sea-flooding at this time. Alternatively, the salt could have been applied as a treatment during the general restoration of 1897. Whatever the source of the salt, it seems likely that the ambient environment was changed by the insertion of a sealed floor in 1897, which could account for the onset of the salt decay.  相似文献   

Change management and the SENCo role: developing key performance indicators in the strategic development of inclusivity     

Liz Done  Mike Murphy  Mia Watt 《Support for Learning》2016,31(4):281-295

This article follows an earlier publication highlighting the changing role of special educational needs co‐ordinators (SENCos) in England. SENCos are now required to manage change strategically and deliver inclusive school cultures. School‐based action research undertaken by a teacher studying for the postgraduate National Award for SEN Co‐ordination (NASENCO) is featured in the article; a strategic review of resource allocation increased the availability and quality of interventions for students with special educational needs and disabilities (SEND). The commentary which frames the study acknowledges that many SENCos are not yet members of a senior school management team (SMT) despite their mandated strategic whole‐school remit. Featuring the process through which one SENCo has strived to enhance SEND provision and develop context‐specific key performance indicators brings official guidance on the SENCo's role in strategic change management into sharp focus, raising questions that should concern both SMTs and non‐SMT SENCos.  相似文献   

Children's ideas about evaporation     

Terry Russell  Wynne Harlen  Dot Watt 《International Journal of Science Education》2013,35(5):566-576

This article reports on research conducted as part of the Primary Science Processes and Concept Exploration (space) Project. The background to, and orientation of, space is briefly described.

Classroom‐based research into children's thinking about evaporation is reported. This work was conducted in close collaboration with teachers of the 5‐11 years age range with the intention of establishing the viability of the techniques for eliciting ideas and managing subsequent interventions within classrooms.

Children's thinking in relation to three main evaporation phenomena are discussed. Ideas about evaporation were categorized by reference to notions of conservation, change of location and change of form of the water.  相似文献   

The effect of ball carrying method on sprint speed in rugby union football players     

Grant SJ  Oommen G  McColl G  Taylor J  Watkins L  Friel N  Watt I  McLean D 《Journal of sports sciences》2003,21(12):1009-1015

Different methods of ball carrying can be used when a player runs with the ball in rugby union. We examined how three methods of ball carrying influenced sprinting speed: using both hands, under the left arm and under the right arm. These methods were compared with running without the ball. Our aim was to determine which method of ball carrying optimizes sprinting speed. Altogether, 48 rugby union players (age 21 +/- 2 years, height 1.83 +/- 0.1 m, body mass 85.3 +/- 12 kg, body fat 14 +/- 5%; mean +/- s) were recruited. The players performed twelve 30-m sprints in total (each player performed three trials under each of three methods of carrying the ball and sprinting without the ball). The design of the study was a form of Latin rectangle, balanced across the trial order for each of the methods and for pairwise combinations of the methods in blocks of four per trial. Each sprint consisted of a 10-m rolling start, followed by a 20-m timed section using electronic timing gates. Compared with sprinting 20 m without the ball (2.58 +/- 0.16 s), using both hands (2.62 +/- 0.16 s) led to a significantly slower time (P < 0.05). Sprinting 20 m with the ball under the left arm (2.61 +/- 0.15 s) or under the right arm (2.60 +/- 0.17 s) was significantly quicker than when using 'both hands' (P < 0.05), and both these methods were significantly slower than when running without the ball (P < 0.05). Accordingly, running with the ball in both hands led to the greatest decrement in sprinting performance, although carrying the ball under one arm also reduced the players' sprinting ability. Our results indicate that to gain a speed advantage players should carry the ball under one arm.  相似文献   

The roles of the mentor and link tutor in primary school mentor training     

Dorothy Watt 《Mentoring & Tutoring: Partnership in Learning》2013,21(2):13-18

This paper reports the evaluation of a small scale pilot mentoring scheme developed by a University Faculty of Education and some of its link primary schools to illuminate how the initiative might most profitably be developed in future years. This evaluation focused on the perceptions of all the parties involved in the mentoring (Head teachers, mentors, class teachers, students and link tutors) about their roles. Some suggestions are made about how the scheme might be developed in the future.  相似文献   

The use of a collaborative math tutoring model to improve content knowledge among special education teacher candidates     

Sarah J. Watt  Leah Wasburn-Moses 《Mentoring & Tutoring: Partnership in Learning》2013,21(3):305-319

ABSTRACT

The mathematics achievement gap in special education is a chronic and significant challenge for the field. The need for improved teacher preparation in mathematics is crucial in addressing this gap. This study examines a capstone experience in higher level mathematics tutoring for preservice teachers. Results indicate that the experience was effective at improving preservice teachers’ higher level math content knowledge compared to teachers who did not receive experiential math learning in their teacher preparation. Implications for preservice teacher preparation programs are presented.  相似文献   

Electronic Course Surveys: Does automating feedback and reporting give better results?     

Stuart Watt  Claire Simpson  Chris McKillop  Viv Nunn 《Assessment & Evaluation in Higher Education》2002,27(4):325-337

This paper discusses an electronic course survey system designed to support evaluation of a modular programme in management taught through distance education. The scale and communication issues raised by distance education, when compounded by a complex rolling modular programme, make conventional evaluation complicated, slow and expensive. To overcome these problems, an automated evaluation process was introduced, partly based on web-based surveying, but significantly emphasising the reporting process and allowing performance indicators and complex analyses to be embedded in high quality word-processed reports, that can be quickly and easily generated after each presentation of a module. The paper discusses the system and the impact that it has had on the evaluation process, before looking to future opportunities for developments in this field, and discussing some of the implications - both expected and unanticipated - that have come out of using automation in the evaluation process.  相似文献   

How to find out where you are when weightless     

Money K  Watt D 《New scientist (1971)》1984,103(1418):12

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If it's going to be,it's up to me: first-year psychology students’ experiences regarding academic success     

Luzelle Naude  Lindi Nel  Ronel van der Watt  Florence Tadi 《Teaching in Higher Education》2016,21(1):37-48

Student life is marked by substantial growth in areas such as self-regulation abilities. In this article, the experiences of first-year Psychology students are explored through the lenses of the self-determination theory. Both content and thematic analyses were done with 79 students’ reflections on the aspects they regarded as facilitating/preventing success in their studies. Responses ranged from complete external control (amotivation and external regulation) to high levels of internal control (integration). While many participants articulated their perceptions of incompetence, other participants took ownership of their behavior and articulated how an interest in and enthusiasm for Psychology as a discipline moved them toward feelings of competence, autonomy, and relatedness. High value was placed on a well-structured but warm and responsive educational context.  相似文献   

Development of adolescents' self-perceptions, values, and task perceptions according to gender and domain in 7th- through 11th-grade Australian students     

Watt HM 《Child development》2004,75(5):1556-1574

Latent growth models estimated developmental trajectories for adolescents' math and English self-perceptions (perceived talent, success expectancies), values (intrinsic, utility) and task perceptions (task difficulty, effort required). A longitudinal cohort-sequential study included 1,323 participants spanning Grades 7 to 11, with Occasion 1 mean ages 13.19, 12.36, and 14.41, respectively, for Cohorts 1, 2, and 3. Self-perceptions and values declined through adolescence, and ratings about difficulty and effort required increased. Gender differences favored boys for math and girls for English, with little evidence for gender intensification or gender convergence hypotheses. Explanations reference socialization and social-cognitive developmental theories and features of the curricula, with domain-specific patterns implying domain-specific explanations. Existing research is extended by modeling a broadened set of social-cognitive constructs within the Australian context.  相似文献