Effects of heat treatment on the adhesion strength, pendulum hardness, surface roughness, color and glossiness of scots pine laminated parquet with two different types of UV varnish application

The objective of this study was to investigate the surface properties of a UV-system applied on laminated parquet made with untreated and heat treated wood (ThermoWood). In this study, wood specimens prepared from Scots pine (Pinus sylvestris) wood were heat treated according to ThermoWood method at 190oC for 2 hours and at 212oC for 1 and 2 hours adhesion strength, pendulum hardness, surface roughness, colour and glossiness were determined. The UV-system was applied in two different types according to manufacturer recommendations. Results show that lightness and glossiness decreases and red colour tone increases with heat treatment. Pendulum hardness increased initially, decreasing afterwards with the intensity of the heat treatment. Tests showed that adhesion generally decreased with heat treatment. No significant differences were found for the surface roughness although a slight decrease was observed

5S activities and its application at a sample company

Total Productive Maintenance (TPM) targets enabling the machine operators to undertake the maintenance activities and therefore to increase the efficiency of the equipments. It struggles with sixgreat losses decreasing the efficiency of the equipment. 5S, which is the pre-step of TPM, is a systematic approach providing the contribution of all personnel in the cleaning regime of the company. The clean and steady environment targeted by 5S has positive impacts on the work safety, quality, efficiency and morale. In this study, 5S system, used for ensuring order and discipline in the companies and ensuring the supervision of both simple and even the smallest details, has been reviewed in full details and they have been taken under the content of the research through selecting the assembly department as pilot department for 5S activities applied at a yacht manufacturing company. It has been targeted to set this as a guide for the directors of the company and the researches working in this fieldby assessing the results of this study

Accelerated weathering performance of Scots pine preimpregnated with copper-based chemicals before varnish coating Part I: coated with cellulosic and polyurethane varnishes

This study aimed to determine the effect of accelerated weathering on gloss, surface hardness and colour changes of Scots pine (Pinus sylvestris L.). Test samples were impregnated with Adolit KD‐5, Wolmanit CX‐8 and Celcure AC‐500 covered with cellulosic and polyurethane varnishes. The results showed that the values of surface hardness and gloss increased after accelerated weathering. While the surface hardness of Scots pine was increased for impregnated and polyurethane‐coated varnish, it decreased for impregnated and cellulosic varnish‐coated Scots pine after 1000 hours of accelerated weathering exposure. Copper‐based chemical impregnation and varnish coating developed the gloss of Scots pine specimens relative to the surface characteristics observed in single‐coated Scots pine specimens. While the most appropriate chemical was Celcure AC‐500 for surface hardness, it was Adolit KD‐5 for the gloss of Scots pine after 1000 hours of accelerated weathering exposure. Wood specimens impregnated prior to the application of varnish were more effective in stabilising the colour of Scots pine than Scots pine only coated with varnish. Polyurethane varnishtreated Scots pine showed better colour stability for each partial and total accelerated weathering exposure period. The total colour changes were lowest for polyurethane varnish‐coated Scots pine impregnated with Celcure AC‐500 after 1000 hours of accelerated weathering exposure.No sponso

Study Of Harmony In The Indoor/Outdoor Context Of Architecture Of The 21st Century Catholic Church In Latvia

<p class="04SantraukaPradzia"><span lang="LT">Wide-ranging use of glass systems in modern sacral architecture extends the traditional dialogue between indoor and outdoor space and makes architects look for new forms or harmony between the two, at the same time keeping focus on the most important thing – sense of God’s presence and idea of spiritual transcendence. Compositional application of coloristics, light and shadow under the impact of insolation and visual accents created by the play of light and shadow should underline altarpiece in church space creating the necessary balance and arranging priorities in the right order. Aesthetic harmony has a subordinated significance. A picturesque landscape seen through a glass system has only a subordinate importance. Harmony of indoor/outdoor space in sacral architecture is achieved only in those cases when expressing a hierarchy or priority values such as an altarpiece accentuated with the help of light, interior design opening to the sky, picturesque view of nature. In order to reach the maximum result a synthesis of mentioned methods is recommended.</span></p