Simplified interflection calculations

The purpose of the paper has been to present simplified methods that will expedite the calculation of ceiling lighting (Type II). Approximate formulas have been given, which allow ordinary slide-rule calculations to be made very easily for the usual range of variables. Only with rooms having very high domance (or perhaps with extraordinarily high floor reflectance) are the complicated equations of the previous paper (1) needed. These approximate formulas can be represented also by alignment charts, Figs. 2 to 5, which further simplify the work.Either the formulas or the charts may be used to investigate the effect of a change in ?₁, ?₂, or ?₃. However, if reflectances are standardized at recommended values, other methods are possible.In particular, one may use graphs (Fig. 6) or a slide-rule (Figs. 7 and 8). The method of calculation chosen for a specific problem will depend on the problem and on the preferences of the designer. The previous equations and tables (3) may always be used; but in most cases, time can be saved by employing the short-cuts given in the present paper.     

Interflectance calculations for various luminaires

Previous interflectance tables have dealt principally with three basic types of lighting (Types I, II, and III). The present paper extends the scope of the interflection method by showing how it can be applied to rooms lighted by hanging luminaires. It is found that most cases arising in practice can be covered by six canonic distributions. The effect of mounting height is handled by means of a simple equation.     

Radiant flux through apertures—I

Equations for the calculation of radiant power F through two apertures in series are well known. A characteristic of these formulae is that they give F as a small difference between two large terms. Evidently, the flux through the apertures must decrease as the spacing between them increases; and for large spacing, the inverse-square relation must hold. Instead of exhibiting this behaviour in an obvious manner, however, the traditional equations give the specious impression of an increase in F with increase in spacing. The paper develops an approximate formulae that applies to apertures in the shape of any regular polygon and that shows clearly how the inverse square relation is approached for large separation.     

Radiant Flux Through Apertures— III

This paper completes our treatment of radiant flux through pairs of apertures. In Part II, we obtained approximate equations for rectangular apertures in parallel planes, with the restriction that two apertures be identical and that one be directly above the other. Here we generalize to the case of any apertures that fit into a rectangular grid. The idea for this generalization originated with Ondracek but it is here expressed in matrix notation, which allows coefficients F_ij to be obtained rather simply.     

Exploring the social connections in preschool settings between children labelled with special educational needs and their peers

This paper reports on a small-scale study of the social interactions between six children labelled with special educational needs and their peers in their respective early years settings. Data from play observations, photographs and staff interviews is used to examine the dynamics of the connections that they make with other children. The position of these six children as active agents in making decisions about their peer interactions is highlighted and the ways that this agency is expressed is analysed. By focusing on the personal strategies that the children use to make social connections the findings contribute to the developing understanding of children's relationships within inclusive early years settings. In particular compatible play interests and personalities are identified as significant factors that attract children to one another in this case study. It also emerged that recurrent playmates did not feature consistently in the social exchanges involving this group of children. This factor is considered in the context of it being indicative of the social connections that children labelled with special educational needs pursue. Suggestions for further investigation are proposed and key practice messages offered around developing awareness and facilitation of social connections between children.     

Exploring the forward citation patterns of patents based on the evolution of technology fields

Forward citations of patents have been used extensively to capture the impact of technological knowledge. However, our understanding of the factors shaping patent citation patterns remains limited. One of the main limitations is the lack of scholarly attention paid to the dynamic influences arising from the evolution of technology fields. From an evolutionary perspective, technological impact is not simply determined by the static attributes of a technology itself; it is also dynamically affected by changes in the external conditions. Drawing on this viewpoint, this study suggests a model for understanding patent citation patterns by reflecting the evolution of the technology fields to which each patent belongs. Four such factors are explored: technology cycle time, potential of technological convergence, popularity of the technology field, and technological novelty. Based on the proposed model, we show how expected citation patterns can change as a result of different scenarios for technology field evolution. We conduct a case study of patents in the information technology and healthcare industries to show citation patterns of patents across heterogeneous industries as well as those within an industry. Contributions to the innovation literature and research investment decisions are discussed.     

标准参照评估的行动实践 ——以香港中文大学通识教育基础课程为案例

香港特别行政区高校从2015年开始，学生学业评估陆续由常模参照评估转为标准参照评估。本文以香港中文大学通识教育基础课程实施标准参照评估的行动为案例，分析了这项新的学业评估方式在实施中所遇到的问题，讨论了解决方法并提出实施模型。该模型包含评分量表的设计与开发、量表使用、教师意见反馈与量表修改，以及评分之后的集体讨论这一套实施流程。文章最后指出，要保证标准参照评估的有效实施，需建立教师实践共同体。实践共同体的行动包括：教师共同开发评估标准，通过集体讨论对评估标准的含义和使用达成共识，共同审视评估结果，根据评估结果进一步修改和完善评估标准。