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- 저자 : Yu Okawara (검색결과 2 건)
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Successive Magnetic Transitions of PrRh2 Single Crystals
Yu Okawara,Jingwei Cui,Tetsuya Fujiwara,Toru Shigeoka,Kazuyuki Matsubayashi,Yoshiya Uwatoko,Shojiro Kimura,Kazuo Watanabe 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Measurements of the magnetization and the specific heat were performed on a PrRh2 single crystal. A strong magnetic anisotropy with the easy magnetization direction of the c-axis is observed. Four anomalies appear in the temperature dependence of magnetic susceptibility along the c-axis;a cusp at TN=52 K, a high peak at T3=38 K, a shoulder at T2=33 K and a small peak at T1=4K are observed, indicating magnetic transitions. The specific heat also shows four anomalies atthe temperatures where the magnetic anomalies appear, confirming the occurrence of successivemagnetic transitions. A clear two-step metamagnetic process appears along the easy magnetizationdirection of the c-axis at low temperatures. The magnetization in the first step is almost constantand is corresponds to (1/5) Ms (Ms: saturation magnetization), indicating that this field-inducedphase has a long period and a stable magnetic structure. A metamagnetic process is hypothesizedon the basis of the magnetic structure. The B001 − T phase diagram is constructed.
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Impact of COVID-19 Infection on Work Functioning in Japanese Workers: A Prospective Cohort Study
Okawara Makoto,Hirashima Keiki,Igarashi Yu,Mafune Kosuke,Muramatsu Keiji,Nagata Tomohisa,Tsuji Mayumi,Ogami Akira,Fujino Yoshihisa,for the CORoNaWork Project 한국산업안전보건공단 산업안전보건연구원 2023 Safety and health at work Vol.14 No.4
Background: The impact of COVID-19 infection on workers’ work function persists even after the acute phase of the infection. We studied this phenomenon in Japanese workers. Methods: We conducted a one-year prospective cohort study online, starting with a baseline survey in December 2020. We tracked workers without baseline work functioning impairment and incorporated data from 14,421 eligible individuals into the analysis. We estimated the incidence rate ratio for new onset of work functioning impairment due to COVID-19 infection during follow-up, using mixed-effects Poisson regression analysis with robust variance. Results: Participants reporting infection between January and December 2021 showed a significantly higher incidence of new work functioning impairment (adjusted incidence rate ratio: 2.18, 95% confidence interval: 1.75e2.71, p < 0.001). The formality of the recuperation environment correlated with a higher risk of work functioning deterioration in infected individuals (p for trend <0.001). Conclusion: COVID-19-infected workers may continue to experience work difficulties due to persistent, post-acute infection symptoms. Companies and society must urgently provide rehabilitation and social support for people with persistent symptoms, recognizing that COVID-19 is not just a transient acute infection.
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