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Analysis of deformation mechanisms in magnesium single crystals using a dedicated four-point bending tester

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Journal of Magnesium and Alloys 2024年第5期12卷 1911-1917页

作者： yutaka Yoshida Rikuto Izawa Kenji Ohkubo Faculty of Engineering Kitami Institute of TechnologyKoen-choKitamiHokkaido 090-8507Japan Graduate student Department of Mechanical and Electrical EngineeringKitami Institute of TechnologyKoen-choKitamiHokkaido 090-8507Japan Center for Advanced Research of Materials Faculty of EngineeringHokkaido UniversityKita-kuSapproHokkaido 060-8628Japan Kyokuto Kaihatsu Kogyo Co. Ltd.AwajiChuohuOosakaOosaka 541-0047Japan

In this study,we explored the deformation mechanisms of Mg single crystals using a combination of scanning electron microscopy and electron backscattered diffraction in conjunction with a dedicated four-point bending *** prepared two single-crystal samples,oriented along theanddirections,to assess the mechanisms of deformation when the initial basal slip was *** thesample,the primary{1012}twin(T1)was confirmed along thedirection of the sample on the compression side with an increase in bending *** thesample,T1 and the secondary twin(T2)were confirmed to be along thedirection,with an orientation of±60°with respect to the bending stress direction,and their direction matched with(0001)in T1 and *** result implies that crystallographically,the basal slip occurs *** addition,thesample showed the double twin in T1 on the compression side and the tertiary twin along thedirection on the tension *** results demonstrated that the maximum bending stress and displacement changed significantly under the bend loading because the deformation mechanisms were different for these single ***,the correlation between bending behavior and twin orientation was determined,which would be helpful for optimizing the bending properties of Mg-based materials.

关键词： Four-point bending Magnesium single crystal Twinning Basal slip Scanning electron microscopy Electron backscatter diffraction

Next-generation regenerative therapy for ischemic stroke using peripheral blood mononuclear cells

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Neural Regeneration Research 2024年第11期19卷 2341-2342页

作者： Masato Kanazawa Itaru Ninomiya yutaka Otsu Masahiro Hatakeyama Department of Neurology Brain Research InstituteNiigata UniversityNiigataJapan

Stroke is the second leading cause of death and the third leading cause of disability worldwide after heart *** predict that stroke deaths and permanent disabilities will increase worldwide by the year ***-target therapies may be insufficient,because ischemic cerebral injury involves several ***-mediated therapies are ideal,because they target multiple cell types to enhance protection and recovery.

关键词： ischemic death cerebral

Comment on:Recurrence after spontaneous separation of epiretinal membrane in a young woman:a case report

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International Journal of Ophthalmology(English edition) 2024年第4期17卷 783-784页

作者： Yusuke Kameda yutaka Kaneko Karin Ishinabe Nichika Fukuoka Yotsuya-sanchome Ekimae Eye Clinic Tokyo 160-0004Japan Department of Ophthalmology and Visual Sciences Yamagata University Faculty of MedicineYamagata 990-9585Japan

Dear Editor,Herein,we provide a commentary on the recently published article by Zeng QZ and Yu WZ[1].This case report provides interesting novel insights into the recurrence of epiretinal membrane(ERM)following self-separation in a young *** addition to the study,we have been investigating spontaneous ERM release for many years and have recently published a related paper[2].

关键词： separation young release

A Study on the Historical Change of Landscape Perception Reflected in the Representation of Kaki （Japanese Persimmon）

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A Study on the Historical Change of Landscape Perception Ref...

Male Morphological Dimorphism in the Genji Firefly Nipponoluciola cruciata in Central Japan

作者： yutaka kudo Ryohei ONO Hiromu ITO Akio SHIMOMURA Graduate School of Agricultural and Life Sciences The University of Tokyo Graduate School of Agricultural and Life Sciences The University of Tokyo Graduate School of Agricultural and Life Sciences The University of Tokyo Graduate School of Agricultural and Life Sciences The University of Tokyo

＜正＞Kaki （Japanese persimmon;Diospyros kaki） is one of the most familiar fruit trees in Japan. It has been frequently planted in house gardens since the ancient times. Kinoshita （2000） suggested that the most often planted edible tree that we can see today in residential area in Tokyo is kaki.1’’ In addition, kaki and a landscape with kaki tend to be connected with a nostalgic image of an autumn rural landscape. In this respect, a landscape with kaki can be seen as a Japanese "prototype-landscape." The point we have to focus on here is that common image and feeling about kaki are shared among the Japanese. It is due to our "landscape perception", a common "way of seeing" shared in a specific social group. Landscape perception is expected to change depending on various social backgrounds. This study considers how our landscape perception has been changed by analyzing the representation of kaki as an expression of landscape. Two genres of Japanese poetry, waka and haiku, are selected as analysis objects of the representation of kaki. We extracted waka and haiku containing the word "kaki" and analyzed how kaki is treated as the subject expressing the landscape, taking into consideration the character of waka and haiku. Until the early Edo era （the 17th century）, kaki and a landscape with it had rarely been composed in waka. It is because kaki had been regarded as unrefined and countrified, and the unsuitable subject for waka. In the Edo era, not only the high educated class but also general urban people had been involved in cultural activities. As cultural importance had been shifted from waka to haiku, the subjects which had not been treated, such as kaki, appeared in the cultural activities which began in the Edo era. Kaki had been composed in haiku more often than in waka. Moreover, descriptions of kaki in haiku had been more various and detailed than waka. We can understand these changes as "the expansion of subjects" and "freedom from the fixed way of representatio

关键词： landscape perception prototype-landscape kaki representation waka and haiku

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Advances in Entomology 2024年第3期12卷 203-209页

作者： yutaka Iguchi Laboratory of Biology Okaya Japan

The Japanese Genji firefly Nipponoluciola cruciata is famous for geographic variation in flash pattern. Such geographic variation has also been well studied in terms of ecology and molecular phylogeny. However, there are very few studies on geographic variation in morphology of this species. This study focused on morphological characteristics of males of this species in Yamanashi and Gunma Prefectures separated by the Kanto Mountains in central Japan. Previous studies have shown that this species in the two prefectures exhibits different genetic features as well as different flash patterns. This study aimed to explore morphological characteristics of males of this species and performed multivariate analysis using measurements previously published in the literature. As a result, allometric analysis between body length and elytra width suggested that this species exhibits different allometric patterns between the two prefectures. Moreover, cluster analysis of measurements of genitalia suggested that this species is completely separated into two different groups between the two prefectures. These results suggest the importance of further morphological studies to clarify the divergence of this species.

关键词： Male Dimorphism Allometriy Cluster Gunma Yamanashi

Change Point Analysis to Detect the Effect of Pruning Severity on Tree Growth

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Open Journal of Forestry 2024年第1期14卷 67-73页

作者： yutaka Iguchi Laboratory of Biology Okaya Japan

The effect of pruning severity on tree growth was analyzed by change point detection using segmented regression. The present study applied this analysis to a well-known published data set including diameter growth response, tree age, pruning severity and pretreatment crown size. First, multiple regression analysis was performed to assess the effect of tree age, pruning severity and pretreatment crown size on diameter growth response. Next, segmented regression analysis was performed to assess the effect of pruning severity on diameter growth response. The results of the multiple regression showed that diameter growth response was significantly influenced by pruning severity and pretreatment crown size. The results of the segmented regression showed that in the whole data set, an abrupt change toward a decrease in diameter growth response was detected at 25% of the live crown removed. However, in the group of fully crowned and open-grown, diameter growth response continuously decreased with increasing pruning severity with no significant abrupt change, whereas in the group of 70% - 90% live crown, diameter growth response did not significantly decrease up to the break point (53% crown removed) and then abruptly decreased. This may be the first study to show the numerical evaluation of the effect of pruning severity on tree growth by change point analysis.

关键词： Regression Analysis Crown Removal Limit Tree Growth Pretreatment Abrupt Change

Geographic Differences in Allometric Patterns of Males of the Japanese Firefly Luciola parvula

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Advances in Entomology 2024年第1期12卷 18-23页

作者： yutaka Iguchi Laboratory of Biology Okaya Japan

It has been well known for many years that males of Luciola parvula (Coleoptera, Lampyridae) have two morphs, namely small and large morphs in Japan. This article performed a statistical reanalysis of their morphological measurements based on previously published data and compared them. As a result, the two morphs were found to have different allometric patterns in the Hakone and Nagano areas, Japan. In Hakone, the relationships between their pronotum width and length were expressed by a common allometric line and a shift in location along the line. However, in Nagano, the relationships between their pronotum width and body length were expressed by two parallel allometric lines (a common slope and different intercepts). The allometric pattern of males of this species may vary among different parts of the body or among different areas. Therefore, this article recommends future studies to measure the same parts of the body as previous studies to clarify geographic variation in allometric relationships.

关键词： Body Size Male Dimorphism Allometric Pattern Hakone Nagano

Evaluation of temperature dependent vortex pinning properties in strongly pinned YBa_(2)Cu_(3)O_(7-δ)thin films with Y_(2)BaCuO_(5)nanoinclusions

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Superconductivity 2024年第1期9卷 95-105页

作者： Alok K.Jha Kaname Matsumoto Tomoya Horide Shrikant Saini Ataru Ichinose Paolo Mele yutaka Yoshida Satoshi Awaji Department of Materials Science and Engineering Kyushu Institute of TechnologyTobata-kuKitakyushu 804-8550Japan Department of Mechanical and Control Engineering Kyushu Institute of TechnologyTobata-kuKitakyushu 804-8550Japan Central Research Institute of Electrical Power Industry YokosukaKanagawa 240-0196Japan College of Engineering-Innovative Global Program Shibaura Institute of TechnologyMinuma-kuSaitama 337-8570Japan Department of Energy Engineering and Science Nagoya UniversityChikusa-kuNagoya 464-8603Japan Institute for Materials Research Tohoku UniversityAoba-kuSendai 980-8577Japan

The pinning of quantized magnetic vortices in superconducting YBa_(2)Cu_(3)O_(7-δ)(YBCO or Y123)thin films with Y_(2)BaCuO_(5)(Y211)nanoinclusions have been investigated over wide temperature range(4.2-77 K).The concentration of Y211 nanoinclusions has been systematically varied inside YBCO thin films prepared by laser ablation technique using surface modified target *** pinning force density values(Fp∼0.5 TNm^(−3)at 4.2 K,9 T)have been observed for the YBCO film with moderate concentration of Y211 nanoinclusions(3.6 area%on ablation target).In addition,uniform enhancement in critical current density(J_(c))was observed in the angular dependent J_(c)measurement of YBCO+Y211 nanocomposite films.Y211 nanoinclusions have been found to be very efficient in pinning the quantized vortices thereby enhancing the in‐field J_(c)values over a wide range of *** the concentration of Y211 secondary phase into Y123 film matrix results into agglomeration of Y211 phase and observed as increased Y211 nanoparticle *** larger secondary phase nanoparticles are not as efficient pinning centers at lower temperatures as they are at higher temperatures due to substantial reduction of the coherence length at lower *** of the temperature dependence of J_(c)for YBCO+Y211 nanocomposite films has been conducted and possible vortex pinning mechanism in these nanocomposite films has been discussed.

关键词： YBCO thin film Critical current Vortex pinning Nanoscale APCs

Entanglement quantification via weak measurements assisted by deep learning

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Photonics Research 2024年第4期12卷 712-719页

作者： MU YANG YA XIAO ZE-YAN HAO YU-WEI LIAO JIA-HE CAO KAI SUN EN-HUI WANG ZHENG-HAO LIU yutaka SHIKANO JIN-SHI XU CHUAN-FENG LI GUANG-CAN GUO CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China College of Physics and Optoelectronic Engineering Ocean University of ChinaQingdao 266100China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China Electric Power Research Institute State Grid Anhui Electric Power Co.Ltd.Hefei 230601China Institute of Systems and Information Engineering University of TsukubaIbaraki 305-8573Japan Center for Artificial Intelligence Research University of TsukubaIbaraki 305-8577Japan Graduate School of Science and Technology Gunma UniversityGunma 371-8510Japan Institute for Quantum Studies Chapman UniversityOrangeCalifornia 92866USA JST PRESTO Saitama 332-0012Japan

Entanglement has been recognized as being crucial when implementing various quantum information ***, quantifying entanglement for an unknown quantum state requires nonphysical operations or post-processing measurement data. For example, evaluation methods via quantum state tomography require vast amounts of measurement data and likely estimation.

关键词： estimation quantum angle