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    Dimensional Stability of Uludag Fir Wood Treated with Liquid Nitrogen after the Steam Test
    (Kastamonu Univ, Orman Fak, 2012) Kurt, Seref; Ozcan, Suleyman; Yapici, Fatih; Likos, Erkan
    In this study, the effect of liquid nitrogen on dimensional stability of Uludag fir (Abies bornmulleriana Mattf) wood after exposing to the steam test was determined. Test samples were treated with liquid nitrogen (LN) for 1, 4 and 10 hours. Subsequently both samples treated with liquid nitrogen and control samples were conditioned to 12 % MC. Dimensional stability of Uludag fir wood was measured after exposing to steam for 2, 6, 12, 24, 48, and 96 hours according to the procedure of TS EN 317. Consequently, different values of dimensional stability of specimens treated with liquid nitrogen were observed.
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    The Effect of Accessories Used in Interior Furniture on Increasing Safety and Prevention of Overturn
    (Kastamonu Univ, 2023) Ozcan, Suleyman; Ozcan, Cemal
    Aim of study: Furniture used indoors; threatens the life safety of users by being knocked over for many reasons such as design, production, user errors, earthquakes, etc. This study was carried out to determine the effects of the variables related to the foots used in the furniture and the horizontal forces on the overturning of furniture.Area of study: This study was carried out in Safranbolu Sefik Yilmaz Dizdar Vocational School Interior Design Department test laboratory.Material and methods: For the experiments, a leg model, which is widely used in the market, was determined and a multi-purpose cabinet was prepared. Loads were applied to this cabinet with the mechanism established within the scope of TS 9215 and TS EN 14073-2 standards. The effects of the obtained results on overturning were evaluated by analysis of variance and Duncan multiple comparison test.Main results: It has been observed that the variables such as the position, diameter, height of the foot used in the furniture and the height of the force causing the overturning are effective at various rates in the safe use of the furniture. It has been calculated that the effect of force application heights on overturning is 50.82% at most and foot positions 12.4% at most.Highlights: The results obtained can be used to increase indoors safety by making it more difficult for overturning of the furniture.
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    Effects of heat treatment and surface roughness on bonding strength
    (Elsevier Sci Ltd, 2012) Ozcan, Suleyman; Ozcifci, Ayhan; Hiziroglu, Salim; Toker, Hilmi
    The objective of this study was to determine the effect of heat treatment on bonding strength of the samples from four different species, namely Scotch pine, oriental beech, white oak and Uludag fir woods. The samples were exposed to three temperature levels of 120 degrees C, 150 degrees C and 180 degrees C for time periods of 2 and 6 h. Based on the findings in this work white oak samples had the highest average roughness (R-a) and maximum roughness (R-max) values of 9.49 mu m and 48.9 mu m, respectively. It appears that heat treatment enhanced overall surface quality of the samples. (C) 2012 Elsevier Ltd. All rights reserved.