A Study on the Coating Characteristics of VO₂ Nanoparticle Thin Film with Various Conditions of Ultrasonic Spray Coater.

Research on smart windows is accelerating with a global trend that emphasizes efficient energy use. VO₂ is representativematerial for thermochromic smart windows that can reflect part of sunlight depending on the external environment. We attempted to produce thermochromic thin films by ultrasonic spray coating of VO₂ nano inks.

The Mechanical Strength of Si Foams in the Mushy Zone during Solidification of Al-Si Alloys.

The mechanical strength of an Al-30% Si alloy in the mushy zone was estimated by using a novel centrifugation apparatus. In the apparatus, the alloy melt was partially solidified, forming a porous structure made of primary Si platelets (Si foam) while cooling. Subsequently, pressure generated by centrifugal force pushed the liquid phase out of the foam.

[Study on relations of variables: attributions of somatic symptoms, fatigue, chronic pain and depression in the elderly].

Purpose: The purpose of this study was to investigate the relationships among variables of somatic attribution, chronic pain, depression and chronic fatigue in the elderly.

Methods: Empirical data for testing hypothetical models was collected from 311 people over 65 years old in a community settings in Seoul, Korea in June and July, 2000. Data were analyzed by descriptive statistics and correlational analysis using pc-SAS program.