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Apparatus for producing a 168Er Bose–Einstein condensate
Seo Bojeong,Chen Ziting,Huang Mingchen,Parit Mithilesh K.,He Yifei,Chen Peng,Jo Gyu-Boong 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.82 No.9
We report on the experimental realization of Bose–Einstein condensate (BEC) of 168Er atoms with tunable s-wave and dipolar interactions in a newly developed apparatus. Here, we describe an efcient method for trapping slow Er atoms in a narrow linewidth magneto-optical trap. After evaporative cooling in a crossed optical dipole trap, we achieve a spin-polarized condensate of > 2.5 × 104 atoms at the temperature of T ≃ 50 nK. The efcient preparation of ultracold erbium bosons ofers new possibilities for studying many-body physics with dipolar interactions.
Jung Rock Moon,Chang Kyun Lee,Sung Noh Hong,Jong Pil Im,Byong Duk Ye,Jae Myung Cha,Sung-Ae Jung,Kang-Moon Lee,Dong Il Park,Yoon Tae Jeen,Young Sook Park,Jae Hee Cheon,Hyesung Kim,BoJeong Seo,Youngdoe 거트앤리버 소화기연관학회협의회 2020 Gut and Liver Vol.14 No.4
Background/Aims: Limited data are available regarding psychosocial distress at the time of diagnosis of ulcerative colitis (UC). We investigated the psychosocial burden and factors related to poor health-related quality of life (HRQL) among patients newly diagnosed with moderate-to-severe UC who were affiliated with the nationwide prospective cohort study. Methods: Within the first 4 weeks of UC diagnosis, all patients were assessed using the Hospital Anxiety and Depression Scale (HADS), Work Productivity and Activity Impairment questionnaire, Inflammatory Bowel Disease Questionnaire (IBDQ), and 12-Item Short Form (SF-12) health survey. A multiple linear regression model was used to identify factors associated with HRQL. Results: Between August 2014 and February 2017, 355 patients completed questionnaires. Significant mood disorders requiring psychological interventions, defined by a HADS score ≥11, were identified in 16.7% (anxiety) and 20.6% (depression) of patients. Patients with severe disease were more likely to have presenteeism, loss of work productivity, and activity loss than those with moderate disease (all p<0.05). Significant mood disorders had the strongest negative relationship with total IBDQ score, which indicates disease-specific HRQL (β coefficient: –22.1 for depression and –40.0 for anxiety, p<0.001). The scores of all SF-12 dimensions, which indicate general HRQL, were remarkably decreased in the study population compared indirectly with previously reported scores in the general population. The Mayo score, C-reactive protein level, and white blood cell count showed significant negative associations with the IBDQ score (p<0.05). Conclusions: Psychosocial screening and timely interventions should be incorporated into the initial care of patients newly diagnosed with UC.