In order to evaluate interlaced yarns on an on-line real time system, diameters of yarn interlaced of a raw yarn are measured by means of an optical sensor and effects of feed ratio, air pressure and yarn speed on various evaluation quantities are clarified quantitatively. Results obtained are as follows.
(1) The number of tangles measured by the sensor agrees well with that by eye in the case of good processing.The distribution of the tangling part ratio against the tangling part distance obtained by means of the sensor agrees almost with that by eye.
(2) A yarn with many tangling parts has a large interlacing effect index as well as a small standard deviation of tangling part distance. Therefore, extremely speaking, an interlaced yarn can be qualitatively evaluated from only the number of tangles.
(3) When a yarn is not interlaced at all, because it presents flat appearance similar to a raw yarn, the mean yarn diameter shows a large value. When a yarn is interlaced, with increasing the feed ratio the number of tangles shows a variation with the maximum and the mean yarn diameter takes a variation similar to the number of tangles. As the air pressure increases, the number of tangles shows a variation with the maximum and the mean yarn diameter presents a variation opposite to the number of tangles. With the increment of the yarn speed, the number of tangles decreases monotonically while the mean yarn diameter increases monotonically.
(4) Within the limit of the present experiment the tangling part length of yarn interlaced of a raw yarn is longer than the opening part length.

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In this study, we discuss the applicability of the Moiré method for measuring the mechanical deformation of textile end-uses.
The results may be summarized as follows :
(1) The application of Moiré method makes it possible to describe the 2-dimensional deformation with the skew angle and the distance of loops at any point. The case for tensile stress on knitted cotton fabric is reported.
(2) The Moiré method can thus be applied to detect the inhomogeneity of loops and the skew angle, or the cover factor of knitted fabric.
(3) The Moire method will offer some suggestions for improving the production and constructon of knitted fabric, when the measuring system is improved to get higher precision and further when 3-dimensional measuring is applied to this measuring method.

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We investigated the critical temperatures and the comfortable temperatures of the carpets. The subjects were 26 female students, and they declared the temperatures, at which they recognized the warmness and felt comfortableness, when they were standing on the carpets bare feet. The results were as follows ;
(1) The mean temperature at which they recognized the warmness was 30.6°C, and that at which they felt comfortableness was 31.4°C.
(2) The increment rates of the sole temperatures were proportional to the heat conduction rates and the heat flows of the carpets.
(3) When the heat flow was increased and it made the sole warm, the subject recognized the warmness, and the heat flow was over a certain value, the subjects felt comfortableness.
(4) The heat conduction rate and the heat flow depended on the thickness of the carpet, therefore the depth weighed by the subject became the important thermal factor of the carpet.
It was concluded that the carpets with high heat conduction rate and high heat flow was the proper carpet as the floor heating carpet.

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