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- Gustavsson, Andreas, et al.
(författare)
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Formalizing the Intent of Design Patterns. An Approach Towards a Solution to the Indexing Problem
- 1999
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The intent section of a pattern description is written in easily understood, natural language, which unfortunately has the drawback of being too imprecise and unstructured for certain applications of the intent section.We will in this essay try to formalize the intent section of a pattern description. Our aim will be to find a structure within the intent description that will reduce ambiguities and at the same time make the classification of patterns easier. The classifications of patterns addresses the problem of "labeling" patterns into one of the following categories: Creational, Structural or Behavioural. Succeeding in classifying patterns by the intent does require that enough information for doing so is contained in the one to two sentences that make up the intent. Whether this is the case or not will be discussed in the essay.A formalized intent section of a pattern description can not replace the understandability of the natural language description but can be thought of as a complement to the standard structure to patterns today.
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| 2. |
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| 3. |
- Suleiman, B.M., et al.
(författare)
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Thermal conductivity and difusivity of wood
- 1999
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Ingår i: Wood Science and Technology. - 1432-5225 .- 0043-7719. ; 33:6, s. 465-473
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Tidskriftsartikel (refereegranskat)abstract
- Transient simultaneous measurements of thermal conductivity and diffusivity of Swedish wood have been performed with the plane source technique on oven-dry hardwood (birch) samples at room temperature and at 100 °C. The influences of temperature, density, porosity and anisotropy on thermal conduction were investigated. The measurements were done in longitudinal (parallel to the grain) and transverse (intermediate between radial and tangential) directions. As the temperature increased from 20 to 100 °C, the thermal conductivity of each sample increased slightly for both longitudinal and transverse directions. The effect of density and porosity on the thermal conductivity may be related to the presence of other scattering mechanisms such as voids and cell boundaries. It seems that the dominant mechanism of heat transfer across the cell lumina in these types of wood is the heat conduction through the voids. An attempt was made to explain the behaviour of the effective thermal conductivity by adopting a model based on the ratio between heat conduction in parallel and serial layers of gas, liquid, and solid phases.
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