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High-Tc SQUID Application for Roll to Roll Metallic Contaminant Detector
S. Tanaka,Y. Kitamura,Y. Hatsukade,T. Ohtani,S. Suzuki,Y .Uchida 한국초전도학회 2012 Progress in superconductivity Vol.14 No.2
A sensitive eight-channel high-Tc Superconducting Interference Device (SQUID) detection system for magnetic contaminant in a lithium ion battery anode was developed. Finding ultra-small metallic foreign matter is an important issue for a manufacturer because metallic contaminants carry the risk of an internal short. When contamination occurs, the manufacturer of the product suffers a great loss from recalling the tainted product. Metallic particles with outer dimensions smaller than 100 microns cannot be detected using a conventional X-ray imaging system. Therefore, a highly sensitive detection system for small foreign matter is required. We have already developed a detection system based on a single-channel SQUID gradiometer and horizontal magnetization. For practical use, the detection width of the system should be increased to at least 65 mm by employing multiple sensors. In this paper, we present an 8-ch high-Tc SQUID roll-to-roll system for inspecting a lithium-ion battery anode with a width of 65 mm. A special microscopic type of a cryostat was developed upon which eight SQUID gradiometers were mounted. As a result, small iron particles of 35microns on a real lithium-ion battery anode with a width of 70 mm were successfully detected. This system is practical for the detection of contaminants in a lithium ion battery anode sheet.
High-$T_c$ SQUID Application for Roll to Roll Metallic Contaminant Detector
Tanaka, S.,Kitamura, Y.,Uchida, Y.,Hatsukade, Y.,Ohtani, T.,Suzuki, S. The Korean Superconductivity Society 2012 Progress in superconductivity Vol.14 No.2
A sensitive eight-channel high-Tc Superconducting Interference Device (SQUID) detection system for magnetic contaminant in a lithium ion battery anode was developed. Finding ultra-small metallic foreign matter is an important issue for a manufacturer because metallic contaminants carry the risk of an internal short. When contamination occurs, the manufacturer of the product suffers a great loss from recalling the tainted product. Metallic particles with outer dimensions smaller than 100 microns cannot be detected using a conventional X-ray imaging system. Therefore, a highly sensitive detection system for small foreign matter is required. We have already developed a detection system based on a single-channel SQUID gradiometer and horizontal magnetization. For practical use, the detection width of the system should be increased to at least 65 mm by employing multiple sensors. In this paper, we present an 8-ch high-Tc SQUID roll-to-roll system for inspecting a lithium-ion battery anode with a width of 65 mm. A special microscopic type of a cryostat was developed upon which eight SQUID gradiometers were mounted. As a result, small iron particles of 35 microns on a real lithium-ion battery anode with a width of 70 mm were successfully detected. This system is practical for the detection of contaminants in a lithium ion battery anode sheet.
A SURVEY OF T TAURI STARS WITH AKARI
Takita, S.,Kataza, H.,Kitamura, Y.,Ueno, M.,Oyabu, S.,Ishihara, D.,Ita, Y. The Korean Astronomical Society 2012 天文學論叢 Vol.27 No.4
We have carried out a survey of T Tauri stars (TTSs) in a 1,800-square-degrees region toward the Taurus-Auriga star forming region with the AKARI Mid-Infrared All-Sky Survey. By combination of AKARI, 2MASS, and UCAC surveys, we created new criteria to chose TTS candidates. We also considered Asymptotic Giant Branch stars and galaxies, which have similar infrared colors, to separate TTSs from these sources. On the basis of our criteria, we find 27 new TTS candidates. To verify our criteria, we performed follow-up observations for them and confirmed that 23 are TTSs.
Host responses of Japanese flounder Paralichthys olivaceus with lymphocystis cell formation
Iwakiri, S.,Song, J.Y.,Nakayama, K.,Oh, M.J.,Ishida, M.,Kitamura, S.I. Academic Press 2014 FISH AND SHELLFISH IMMUNOLOGY Vol.38 No.2
Lymphocystis disease virus (LCDV) is the causative agent of lymphocystis disease (LCD). In this study, we investigated the mechanisms of lymphocystis cell (LCC) formation from the viewpoint of gene expression changes in the infected fish. LCC occurrence and virus titers in the experimentally infected Japanese flounder, Paralichthys olivaceus were monitored by visual confirmation and real-time PCR, respectively. The gene expression changes in the fish fin were investigated by microarray experiments. LCCs firstly appeared in the fish at 21 days post infection (dpi). LCD incidence increased with time and reached 92.9% at 62 dpi. LCDV genome was firstly detected from dorsal fins at 14 dpi, and the relative amount of the genome gradually-increased until 56 dpi. Since the occurrence of LCC was approximately synchronized with increasing of the virus genome, virus replication might play important roles for LCC formation. The microarray detected a few gene expression changes until 28 dpi. However, the number of expression changed genes dramatically increased between 28 and 42 dpi in which LCCs formation was active. From the microarray data analyses, apoptosis and cell division related genes were down-regulated, whereas cell fusion and collagen related genes were up-regulated at 42 dpi. Together with the observation of morphological changes of LCCs in previous reports, it is suggested that the following steps are involved in LCC formation: the virus infected cells were (1) inhibited apoptotic death and (2) cell division before enlargement, (3) hypertrophied by cell fusion, and (4) surrounded by a hyaline capsule associated with the alteration of collagen fibers.
Goto, M.,Iwamura, T.,Han, S.Z.,Kim, S.,Yamamoto, T.,Lim, S.H.,Ahn, J-H.,Kitamura, J.,Lee, J. Elsevier 2019 International journal of fatigue Vol.123 No.-
<P><B>Abstract</B></P> <P>Fatigue tests were conducted on round bar specimens of a solution-treated and air-cooled Cu-Ni-Si alloy with high solute concentrations of 6% Ni and 1.5% Si. This alloy was strengthened by disc-shaped Ni<SUB>2</SUB>Si precipitates, a few tens of nanometers in diameter, formed during air cooling. The results were compared with those of a conventional solution-treated Cu-Ni-Si alloy cooled by water quenching. The correlation between the tensile and fatigue strengths of the two alloys differed completely from the general tendency that enhanced tensile strength brings an increase in fatigue strength. Indeed, the fatigue strength of the air-cooled Cu-Ni-Si alloy was 1.1 times higher than that of the water-quenched alloy, while the tensile strength was only 75% that of the water-quenched alloy. Moreover, the electrical conductivity of the air-cooled specimens in International Annealed Copper Standard (IACS) percentage points was 1.7 times higher than that of the water-quenched specimens. The physical background for the superior fatigue strength of the air-cooled Cu-Ni-Si alloy, including the role of microstructure, is discussed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Air cooling (AC) instead of water quenching (WQ) was applied after SHT. </LI> <LI> Fatigue strength of AC specimen was 1.1 times greater than WQ one. </LI> <LI> Electrical conductivity of AC specimen was 1.7 times greater than WQ one. </LI> <LI> Superior characteristics of AC specimen was discussed based on microstructure. </LI> </UL> </P>
Study on α-cluster levels in non-4n nuclei using low-energy RI beams
Yamaguchi, H,Kahl, D,Hayakawa, S,Sakaguchi, Y,Abe, K,Nakao, T,Suhara, T,Iwasa, N,Kim, A,Kim, D H,Cha, S M,Kwag, M S,Lee, J H,Lee, E J,Chae, K Y,Wakabayashi, Y,Imai, N,Kitamura, N,Lee, P,Moon, J Y,Lee, IOP Publishing 2017 Journal of physics. Conference series Vol.863 No.-
Goto, M.,Yamamoto, T.,Han, S.Z.,Lim, S.H.,Kim, S.,Iwamura, T.,Kitamura, J.,Ahn, J.-H.,Yakushiji, T.,Lee, J. Elsevier 2019 Materials science & engineering. properties, micro Vol.747 No.-
<P><B>Abstract</B></P> <P>The effect of microstructure on the fatigue strength of age-hardened Cu–6Ni–1.5Si alloy was investigated in this study. The aging was conducted at 500 °C for 0.5 h for the precipitation of disk-shaped δ-Ni<SUB>2</SUB>Si precipitates (continuous precipitates) and 3 h for the discontinuous precipitation of fiber-shaped, stable δ-Ni<SUB>2</SUB>Si precipitates to strengthen the Cu matrix. The tensile strength of 0.5 h-aged specimens was about 1.3 times greater than that of the 3 h-aged counterparts, but with inferior electrical conductivity. Despite the considerable difference in tensile strength, no notable difference in fatigue strength was observed between 0.5 h- and 3 h-aged specimens. The 3 h-aged specimens had superior electrical conductivity without sacrificing fatigue strength of the 0.5 h-aged specimens. The physical background of high-cycle fatigue strength in Cu–6Ni–1.5Si alloys with continuous precipitates and discontinuous precipitates is discussed considering the microstructure-sensitive behavior of fatigue cracks.</P>