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Microwave Dielectric Properties of Bi<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> Composite Ceramics
Axelsson, Anna-karin,Sebastian, Maladil,McN Alford, Neil The Korean Ceramic Society 2003 한국세라믹학회지 Vol.40 No.4
B $i_2$ $O_3$-Ti $O_2$ composite dielectric ceramics have been prepared by a conventional solid state ceramic route. The composite ceramics were prepared with starting materials of different origin and the microwave dielectric properties were investigated. The sintered ceramics were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray microanalysis, Raman and microwave methods. Structural and microstructural analyses identified two separate phases: Ti $O_2$(rutile) and B $i_2$ $Ti_4$0$_{11}$. The separate grains of titania and bismuth titanate were distributed uniformly in the ceramic matrix. The composition 0.88Ti $O_2$-0.12B $i_2$ $Ti_4$ $O_{11}$ was found to have a Q$\times$f of 9300 GHz (measured at a frequency of 3.9 GHz), a temperature coefficient of frequency, $\tau$$_{cf}$ near zero and a high relative permittivity, $\varepsilon$r of 83. The microwave dielectric properties were measured down to 20$^{\circ}$K K. The quality factor increased on cooling the ceramic samples.les.
Fermented and ripened fish products in the northern European countries
Torstein Skåra,Lars Axelsson,Gudmundur Stefansson,Bo Ekstrand,Helge Hagen 한국식품연구원 2015 Journal of Ethnic Foods Vol.2 No.1
In northern Europe a number of fish products are prepared in such a way that biochemical and microbial action can take place. These are complex processes for which there are few available scientific studies. This article covers the origin, manufacturing, characteristics, and consumption of traditional fermented fish products, including surströmming from Sweden, rakfisk from Norway, hákarl from Iceland, and the barrel-salted herring that was commonly produced in most of northern Europe.
Jeon, Jin Yong,Hong, Joo Young,Lavandier, Catherine,Lafon, Jeanne,Axelsson, Ö,sten,Hurtig, Malin Elsevier 2018 Applied acoustics Vol.133 No.-
<P><B>Abstract</B></P> <P>This study aims at examining the effect of socio-cultural context, including language, on soundscape assessments in urban parks. In total, 95 persons took part in three laboratory experiments, conducted in France (30 participants), Korea (30 participants) and Sweden (35 participants). Twenty-eight audio-visual excerpts from recordings conducted in five urban parks were used as stimuli. The participants evaluated soundscape quality using attribute scales provided in their own native languages. Principal Components Analysis produced two principal components of perceived affective quality, <I>Pleasantness</I> and <I>Eventfulness</I>. There were high levels of similarity in attributes associated with the <I>Pleasantness</I> among the three countries, whereas some differences were observed in the attributes related to <I>Eventfulness</I>. Two hierarchical cluster analyses were conducted based on perceived dominance of sound sources, and component scores of perceived affective quality. There were no significant differences in clustering results based on perceived dominance of sound sources among the different nationalities. In contrast, discrepancies were found in the clustering results based on perceived affective quality. In particular, perceptual responses to human sounds, birdsong, and water sounds, which are closely related to <I>Eventfulness,</I> were significantly different across the three cultural backgrounds. These findings provide empirical evidence of socio-cultural differences in soundscape assessment.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cross-national soundscape research was conducted in France, Korea and Sweden. </LI> <LI> There were great similarities in the assessment of pleasantness of soundscapes across countries. </LI> <LI> Socio-cultural effects were found in the eventfulness of soundscapes. </LI> <LI> Perceptual responses to sound sources varied across countries. </LI> </UL> </P>
정동우(DongWoo Jeong),이봉준(BongJoon Lee),김길주(GilJoo Kim),TaeHyung Kim,SangDo Park,JinYoung Nam,Johan Svard,Peter Axelsson 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Neck Injuries Caused by Rear Crash are the most common accident type in motor vehicle accident. This study addresses Neck Injury protection system to deal with enhanced Neck Injury rating systems in Euro Ncap & Kncap. The Known factor to reduce neck injury is reducing relative movement between Head & Torso. This study is focused on reducing torso acceleration to minimize neck injuries by controlling seat back frame.