21,727 results on '"M. H. Kim"'
Search Results
2. The CALIPSO version 4.5 stratospheric aerosol subtyping algorithm
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J. L. Tackett, J. Kar, M. A. Vaughan, B. J. Getzewich, M.-H. Kim, J.-P. Vernier, A. H. Omar, B. E. Magill, M. C. Pitts, and D. M. Winker
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Environmental engineering ,TA170-171 ,Earthwork. Foundations ,TA715-787 - Abstract
The accurate classification of aerosol types injected into the stratosphere is important to properly characterize their chemical and radiative impacts within the Earth climate system. The updated stratospheric aerosol subtyping algorithm used in the version 4.5 (V4.5) release of the Cloud Aerosol Lidar with Orthogonal Polarization (CALIOP) level 2 data products now delivers more comprehensive and accurate classifications than its predecessor. The original algorithm identified four aerosol subtypes for layers detected above the tropopause: volcanic ash, smoke, sulfate/other, and polar stratospheric aerosol (PSA). In the revised algorithm, sulfates are separately identified as a distinct, homogeneous subtype, and the diffuse, weakly scattering layers previously assigned to the sulfate/other class are recategorized as a fifth “unclassified” subtype. By making two structural changes to the algorithm and revising two thresholds, the V4.5 algorithm improves the ability to discriminate between volcanic ash and smoke from pyrocumulonimbus injections, improves the fidelity of the sulfate subtype, and more accurately reflects the uncertainties inherent in the classification process. The 532 nm lidar ratio for volcanic ash was also revised to a value more consistent with the current state of knowledge. This paper briefly reviews the previous version of the algorithm (V4.1 and V4.2) then fully details the rationale and impact of the V4.5 changes on subtype classification frequency for specific events where the dominant aerosol type is known based on the literature. Classification accuracy is best for volcanic ash due to its characteristically high depolarization ratio. Smoke layers in the stratosphere are also classified with reasonable accuracy, though during the daytime a substantial fraction are misclassified as ash. It is also possible for mixtures of ash and sulfate to be misclassified as smoke. The V4.5 sulfate subtype accuracy is less than that for ash or smoke, with sulfates being misclassified as smoke about one-third of the time. However, because exceptionally tenuous layers are now assigned to the unclassified subtype and the revised algorithm levies more stringent criteria for identifying an aerosol as sulfate, it is more likely that layers labeled as this subtype are in fact sulfate compared to those assigned the sulfate/other classification in the previous data release.
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- 2023
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3. Measurement of High-energy Cosmic-Ray Proton Spectrum from the ISS-CREAM Experiment
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G. H. Choi, E. S. Seo, S. Aggarwal, Y. Amare, D. Angelaszek, D. P. Bowman, Y. C. Chen, M. Copley, L. Derome, L. Eraud, C. Falana, A. Gerrety, J. H. Han, H. G. Huh, A. Haque, Y. S. Hwang, H. J. Hyun, H. B. Jeon, J. A. Jeon, S. Jeong, S. C. Kang, H. J. Kim, K. C. Kim, M. H. Kim, H. Y. Lee, J. Lee, M. H. Lee, L. Lu, J. P. Lundquist, L. Lutz, A. Menchaca-Rocha, O. Ofoha, H. Park, I. H. Park, J. M. Park, N. Picot-Clemente, R. Scrandis, J. R. Smith, R. Takeishi, N. Vedenkin, P. Walpole, R. P. Weinmann, H. Wu, J. Wu, Z. Yin, Y. S. Yoon, and H. G. Zhang
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- 2022
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4. The CALIPSO version 4 automated aerosol classification and lidar ratio selection algorithm
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M.-H. Kim, A. H. Omar, J. L. Tackett, M. A. Vaughan, D. M. Winker, C. R. Trepte, Y. Hu, Z. Liu, L. R. Poole, M. C. Pitts, J. Kar, and B. E. Magill
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Environmental engineering ,TA170-171 ,Earthwork. Foundations ,TA715-787 - Abstract
The Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) version 4.10 (V4) level 2 aerosol data products, released in November 2016, include substantial improvements to the aerosol subtyping and lidar ratio selection algorithms. These improvements are described along with resulting changes in aerosol optical depth (AOD). The most fundamental change in the V4 level 2 aerosol products is a new algorithm to identify aerosol subtypes in the stratosphere. Four aerosol subtypes are introduced for stratospheric aerosols: polar stratospheric aerosol (PSA), volcanic ash, sulfate/other, and smoke. The tropospheric aerosol subtyping algorithm was also improved by adding the following enhancements: (1) all aerosol subtypes are now allowed over polar regions, whereas the version 3 (V3) algorithm allowed only clean continental and polluted continental aerosols; (2) a new dusty marine aerosol subtype is introduced, representing mixtures of dust and marine aerosols near the ocean surface; and (3) the polluted continental and smoke subtypes have been renamed polluted continental/smoke and elevated smoke, respectively. V4 also revises the lidar ratios for clean marine, dust, clean continental, and elevated smoke subtypes. As a consequence of the V4 updates, the mean 532 nm AOD retrieved by CALIOP has increased by 0.044 (0.036) or 52 % (40 %) for nighttime (daytime). Lidar ratio revisions are the most influential factor for AOD changes from V3 to V4, especially for cloud-free skies. Preliminary validation studies show that the AOD discrepancies between CALIOP and AERONET–MODIS (ocean) are reduced in V4 compared to V3.
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- 2018
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5. Development of a scintillator-based optical soft x-ray (OSXR) diagnostic system for KSTAR tokamak
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M. W. Lee, Junghee Kim, M. H. Kim, Soobin Lim, Jayhyun Kim, and C. Sung
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Instrumentation - Abstract
We have developed a new scintillator-based optical soft x-ray (OSXR) diagnostic system for KSTAR. By utilizing fiber optic faceplates, mm-size lens arrays, and fiber bundles, we have successfully constructed a novel optical system for scintillator-based soft x-ray detection to overcome the limited vacuum-port conditions in KSTAR. P47 (Y2SiO5), which has a fast rise (∼7 ns) and decay (∼100 ns) time sufficient for detecting plasma instabilities observed in the kHz–MHz spectral range, was selected as the scintillator material for the KSTAR OSXR system. Scintillation toward each detection channel is collected by the lens arrays coupled to optical fiber cores, which are connected to the photodetector system. Initial results obtained during the 2022 KSTAR experimental campaign support the validity of the OSXR data through the consistency of OSXR measurement results with other diagnostics. We also observe that the OSXR system can capture magnetohydrodynamic activities, such as sawtooth oscillations, and provide valuable information for disruption mitigation studies using shattered pellet injection.
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- 2023
6. The Influence of Neurological Disorders Before Cardiac Myxoma Surgery on the Rate of Postoperative Recurrences: Analysis of 317 Patients in a Single Center
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Byul Hee Yoon, Wonhyoung Park, Jae Sung Ahn, Jung Cheol Park, Joonho Byun, M. H. Kim, and Seungjoo Lee
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medicine.medical_specialty ,business.industry ,Incidence (epidemiology) ,Medical record ,Myxoma ,Disease ,medicine.disease ,Single Center ,Surgery ,Heart Neoplasms ,Postoperative Complications ,Aneurysm ,Recurrence ,cardiovascular system ,medicine ,Humans ,cardiovascular diseases ,Neurology (clinical) ,Nervous System Diseases ,Adverse effect ,business ,Retrospective Studies ,Rare disease - Abstract
Background and Purpose Cardiac myxoma is a very rare disease for which resection is the treatment gold standard. There are many neurologic manifestations associated with this disease, including embolic infarctions, arterial aneurysms, and brain metastatic myxomas, but few large-scale studies have addressed this. We here retrospectively analyzed the incidence, type, and prognosis of these neurologic disorders. Methods We enrolled 317 patients who received a cardiac myxoma resection between 2004 and 2019 at our institution. A retrospective review of the medical records and radiologic imaging was performed for each patient, and various clinical factors were compared and analyzed with regard to clinical outcomes and the incidence of adverse events. Results Patients with a neurologic disorder before surgery were found to be more likely to develop new postoperative neurologic complications (p = .003). Patients with neurologic disorder arising at any time before or after surgery had poorer outcomes (p Conclusion The clinical management of cardiac myxoma must take account of neurologic sequelae independently of the surgical intervention to remove the lesion. Cardiac myxoma patients with any neurologic disorder should undergo both neurosurgical follow-up as well as cardiac surgical follow-up, even if myxoma removal surgery has been performed. We suggest that that active neuroimaging during long term follow-up is essential in these cases.
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- 2022
7. A Burn-in Potential Region Detection Method for the OLED panel displays.
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M.-H. Kim, S.-H. Chae, and J.-S. Kim
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- 2018
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8. The Boronated Scintillator Detector of the ISS-CREAM Experiment
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Y Amare, T Anderson, D J Angelaszek, N Anthony, K Cheryian, G H Choi, M Copley, S Coutu, L Derome, L Eraud, L Hagenau, J H Han, H G Huh, Y S Hwang, H J Hyun, S Im, H B Jeon, J A Jeon, S Jeong, S C Kang, H J Kim, K C Kim, M H Kim, H Y Lee, J Lee, M H Lee, J Liang, J T Link, L Lu, L Lutz, A Menchaca-Rocha, T Mernik, John W Mitchell, S I Mognet, S Morton, M Nester, S Nutter, O Ofoha, H Park, I H Park, J M Park, N Picot-Clemente, R Quinn, E S Seo, J R Smith, P Walpole, R P Weinmann, J Wu, and Y S Yoon
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Astrophysics - Abstract
The Cosmic Ray Energetics And Mass for the International Space Station (ISS-CREAM) instrument is a next-generation experiment for the direct detection and study of cosmic-ray nuclei and electrons. With a long exposure in low Earth orbit, the experiment will determine the particle fluxes and spectral details of cosmic-ray nuclei from hydrogen to iron, over an energy range of about 10(exp 12) eV to > 10(exp 15) eV, and of cosmic-ray electrons over an energy range of about 5x10(exp 10) eV to > 10(exp 13) eV. The instrument was deployed to the ISS in August 2017 on the SpaceX CRS-12 mission. We review the design, implementation and performance of one of the ISS-CREAM detector systems: a boron loaded scintillation detector used in discriminating electron-induced events from the much more abundant cosmic-ray nuclei.
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- 2019
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9. Reusing hepatic grafts in Korea: a case report
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Hye Young Kim, Jeongrim Lee, M H Kim, YounJung Choi, Byunghyun Choi, and Wonhyun Cho
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medicine.medical_specialty ,business.industry ,Medicine ,business ,Surgery - Published
- 2021
10. Effect of early hysterectomy on a risk of incident cardiovascular disease in women: a nationwide population-based cohort study
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B G Kim, J S Yuk, G S Kim, J K Seo, M N Jin, H Y Lee, Y S Seo, M H Kim, S W Yang, S H Yoon, Y S Byun, and B O Kim
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Cardiology and Cardiovascular Medicine - Abstract
Aim Women who inevitably underwent surgical hysterectomy before natural menopause may have an earlier increase in hematocrit and storage iron than women who continue menstruation, thereby increasing the risk of cardiovascular disease (CVD) early. We aimed to evaluate the association of women with hysterectomy vs. without hysterectomy before their 50s with the risk of incident CVD. Methods This was a retrospective-cohort study, 135,575 women aged 40 to 50 years in 2011–2014 were extracted from the Korean Health Insurance Review and Assessment Service data and after propensity score matching, 55,539 pairs were included in hysterectomy and non-hysterectomy group respectively. The primary endpoint was major adverse cardiac and cerebrovascular events (MACCE), a composite of cardiovascular death, myocardial infarction (MI), stroke, and coronary artery revascularization. Results After adjustment for confounding factors, hysterectomy group had an increased risk of MACCE compared with non-hysterectomy group (hazard ratio [HR], 1.25; 95% confidence interval [CI], 1.09–1.44). Regarding individual outcomes, cardiovascular death, MI, and coronary revascularization were comparable between the groups, whereas, the risk of stroke was significantly higher in hysterectomy group than non-hysterectomy group (HR, 1.31; 95% CI, 1.12–1.53). Even after excluding women who underwent oophorectomy, hysterectomy group had a higher risk of MACCE than non-hysterectomy group (HR, 1.24; 95% CI 1.06–1.44). Conclusions Early surgical menopause due to hysterectomy, not hormonal menopause, was associated with an increased risk for a composite of CVD, especially stroke. This suggest that the role of “uterus” as well as sex hormones may be important for the sharp increase in the risk of CVD in women after menopause. Funding Acknowledgement Type of funding sources: None.
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- 2022
11. Prognostic implication of platelet reactivity according to disease entity after drug eluting stent implantation: results from the PTRG-DES consortium
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P Hyun Woong, J Y H Jeong, K B K Kim, J H J Joo, P Y Park, C K Chang, S Y B Song, A S G Ahn, S J W Suh, L S Y Lee, C J R Cho, H S K Kim, K M H Kim, and S E S Shin
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Cardiology and Cardiovascular Medicine - Abstract
Background Relationship between the level of antiplatelet effect and clinical event appears weak in East Asian patients. In addition prognostic implication of platelet reactivity may differ according to index presentation of disease entity (AMI vs. non-AMI). Methods PTRG-PFT consortium was established to determine the linkage of platelet function with long-term clinical outcome during DAPT (aspirin+clopidogrel) in DES-treated East Asian patients (n=11,714). Platelet reactivity was measured using the VerifyNow P2Y12 assay and its level was divided according to quartile distribution (≤168, 169–220, 221–271, ≥272 P2Y12 reaction unit [PRU]). Primary endpoints were incidences of major adverse cardiac and cerebrovascular events (MACCE) post-PCI. Results Impact of platelet reactivity on MACCE occurrence appeared proportionally increased irrespective of type of disease entity, but their relationship was relatively stronger in the AMI vs. non-AMI group (Figure 1A and B). The cutoff of high-risk platelet reactivity was lower in the AMI group compared with the non-AMI group (225 vs. 245 PRU), and the cutoff of low-risk platelet reactivity (immunity zone) was similar between the groups (175 vs. 170 PRU). In the AMI patients (28.5%), 3rd and 4th quartiles significantly increased MACCE rate (HRadjusted 2.19 and 2.24) (Figure 1C and D). However, 4th quartile only was significantly associated with increased risk of MACCE among the non-AMI patients (71.5%) (HRadjusted 2.19). Conclusion Close associations between platelet reactivity and MACCE occurrence were observed irrespective of type of disease entity. In addition, the targeted antiplatelet level to prevent platelet-centric events appeared similar between the AMI and non-AMI patients. Funding Acknowledgement Type of funding sources: Foundation. Main funding source(s): Korean Society of Intervention Cardiology
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- 2022
12. Blunted atrial reverse remodeling a year after catheter ablation for atrial fibrillation and their long-term rhythm outcome
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M H Kim, I Hwang, J W Park, H T Yu, T H Kim, J S Uhm, B Joung, M H Lee, and H N Pak
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Cardiology and Cardiovascular Medicine - Abstract
Background Although active rhythm control by atrial fibrillation (AF) catheter ablation (AFCA) reduces left atrial (LA) dimension, blunted atrial reverse remodeling can be observed in patients with significant atrial myopathy. We explored the characteristics and long-term outcomes of AF patients who showed blunted atrial reverse remodeling despite no AF recurrence within a year after AFCA. Methods Among a total of 2,756 patients with AFCA, we included 1,685 patients (74.8% male, 60.2±10.1 years old, 54.5% paroxysmal AF) who underwent both baseline and 1-year follow-up echocardiogram, baseline LA>40mm, and did not recur within a year. We divided them into tertile groups (T1–T3) based on one-year percent change of LA dimension after propensity matching for age, sex, AF type, and baseline LA dimension. We also investigated the patients' genetic characteristics with blunted LA reverse remodeling (T1) using a genome-wide association study (GWAS). Results Patients with blunted LA reverse remodeling (T1, n=424) were independently associated with body mass index (OR 1.082 [1.010–1.160], p=0.025), LA peak pressure (OR 1.010 [1.002–1.019], p=0.019), LA wall thickness (OR 0.448 [0.252–0.789], p=0.006), LA voltage (OR 0.651 [0.463–0.907], p=0.012), and pericardial fat volume (OR 1.004 [1.001–1.008], p=0.014). Throughout 65.9±37.4 months of follow-up, the incidence of AF recurrence a year after the procedure was significantly higher in the T1 group than in T2 or T3 groups (Log-rank p Conclusions Patients with blunted LA reverse remodeling after AFCA were independently associated with low LA voltage, thin wall thickness, high LA pressure, and fat volume, and have a genetic background. Long-term clinical recurrence a year after AFCA was higher in this patient group with suspicious atrial myopathy. Funding Acknowledgement Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Ministry of Health and WelfareNational Research Foundation of Korea
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- 2022
13. Development and validation of a risk scoring model for postoperative adult moyamoya disease
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Wonhyoung Park, Jung Cheol Park, M. H. Kim, Seungjoo Lee, Si Un Lee, Do Hoon Kwon, Yeongu Chung, and Jae Sung Ahn
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Adult ,Male ,medicine.medical_specialty ,Multivariate analysis ,Hyperlipidemias ,Neuroimaging ,Comorbidity ,Models, Biological ,Risk Assessment ,Cigarette Smoking ,03 medical and health sciences ,Postoperative Complications ,0302 clinical medicine ,Risk Factors ,Modified Rankin Scale ,Internal medicine ,Diabetes Mellitus ,medicine ,Humans ,Generalizability theory ,Moyamoya disease ,Family history ,Stroke ,Retrospective Studies ,Cerebral Revascularization ,business.industry ,General Medicine ,Middle Aged ,medicine.disease ,Cerebral Angiography ,Treatment Outcome ,ROC Curve ,030220 oncology & carcinogenesis ,Cohort ,Female ,Moyamoya Disease ,business ,030217 neurology & neurosurgery - Abstract
OBJECTIVE The current grading system for moyamoya disease (MMD) is focused on angiographic studies with limited clinical application. The authors aimed to determine relevant factors that may impact postoperative outcome and establish a scoring system to predict the functional outcome. METHODS Adult patients with MMD who underwent treatment between 1998 and 2016 were included. Factors such as age, sex, comorbidity, smoking, MMD family history, initial presentation, multimodal imaging modalities, and types of surgical revascularization were thoroughly reviewed. These factors were analyzed to determine possible risk factors related to unfavorable 6-month postoperative outcomes using the modified Rankin Scale (mRS) (unfavorable: mRS score ≥ 3). A scoring system was developed using these independent risk factors to predict the outcome and validated using prospectively collected data from multiple centers between 2017 and 2018. RESULTS Of 302 patients for whom applications were submitted, 260 patients (321 hemispheres) met the diagnostic criteria. In multivariate analysis, hyperlipidemia, smoking, cerebral infarction on preoperative CT or MRI, and moderately to severely reduced regional cerebrovascular reserve results from Diamox SPECT were significantly related to unfavorable outcome. The authors developed a scoring system and stratified patients into risk groups according to their scores: low-risk (score 0–3), intermediate-risk (score 4–6), and high-risk (score 7–9) groups. This model demonstrated both good discrimination and calibration using C-statistics and the Hosmer-Lemeshow goodness-of-fit test showing 0.812 (95% CI 0.743–0.881) (p = 0.568) for the development and 0.954 (95% CI 0.896–1) (p = 0.097) for the temporal and external validation cohort. CONCLUSIONS The authors’ scoring system is readily adoptable to predict the postoperative outcome for MMD. Their data revealed the importance of smoking and hyperlipidemia, which were the only modifiable factors included in the scoring system. The authors validated their scoring system both internally and externally and maintained good performance, highlighting the system’s generalizability and reliability.
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- 2021
14. First observation and interpretation of spontaneous collective radiation from fusion-born ions in a stellarator plasma
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B C G Reman, R O Dendy, H Igami, T Akiyama, M Salewski, S C Chapman, J W S Cook, S Inagaki, K Saito, R Seki, M Toida, M H Kim, S G Thatipamula, and G S Yun
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Large helical device ,Nuclear Energy and Engineering ,Hybrid kinetic modelling ,Ion cyclotron emission ,Fusion-born ions ,High performance computing ,Condensed Matter Physics ,Heliotron stellarator ,QC - Abstract
During bursty MHD events, transient ion cyclotron emission (ICE) is observed from deuterium plasmas in the large helical device (LHD) heliotron-stellarator. Unusually, the frequencies of the successive ICE spectral peaks are not close to integer multiples of the local cyclotron frequency of an energetic ion population in the likely emitting region. We show that this ICE is probably driven by a subset of the fusion-born protons near their birth energy E H = 3.02 MeV. This subset has a kinetic energy component parallel to the magnetic field, m H v ∥ 2 / 2 , significantly greater than its perpendicular energy m H v ⊥ 2 / 2 , for which v ⊥ ∼ V A , the Alfvén speed. First principles computations of the collective relaxation of this proton population, within a majority thermal deuterium plasma, are carried out using a particle-in-cell approach. This captures the full gyro-orbit kinetics of all ions which, together with an electron fluid, evolve self-consistently with the electric and magnetic fields under the Maxwell–Lorentz equations. The simulated ICE spectra are derived from the Fourier transform of the fields which are excited. We find substantial frequency shifts in the peaks of the simulated ICE spectra, which correspond closely to the measured ICE spectra following the resonance condition ω = k ∥ v ∥ + n Ω H for nth proton harmonic. This suggests that the transient ICE in LHD is generated by the identified subset of the fusion-born protons, relaxing under the magnetoacoustic cyclotron instability. So far as is known, this is the first report of a collective radiation signal from fusion-born ions in anon-tokamak magnetically confined plasma. Disambiguation between two or more energetic ion species that could potentially generate complex observed ICE spectra is an increasing challenge, and the results and methodology developed here will assist this. Our approach is also expected to be relevant to ICE driven by ion beams with lower parallel velocities, for example in cylindrical plasma experiments.
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- 2022
15. Brief Report: Development of App-based CBT Program for Depressive College Students: Mind Booster Green
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M. H. Kim and K. M. Chung
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- 2022
16. Clinical case of CNS-involved refractory thrombotic thrombocytopenic purpura
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M. H. Kim, Seungjoo Lee, and Minhan Kim
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medicine.medical_specialty ,Refractory ,business.industry ,Cerebral infarction ,Internal medicine ,medicine.medical_treatment ,medicine ,Thrombotic thrombocytopenic purpura ,Plasmapheresis ,Clinical case ,business ,medicine.disease ,Gastroenterology - Published
- 2021
17. A Prognostic Model of Pontine Hemorrhage Based on Hemorrhage Volume and Location
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Jae Sung Ahn, Wonhyoung Park, M. H. Kim, Minhan Kim, Seung Hoon You, Su-Hee Cho, Seungjoo Lee, Jung Cheo Park, and Ji Eun Park
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medicine.medical_specialty ,Pontine hemorrhage ,business.industry ,Prognostic model ,Medicine ,Radiology ,business ,Volume (compression) - Published
- 2021
18. Reactive Oxygen Species Scavenger in Acute Intracerebral Hemorrhage Patients
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Joonho Byun, Jae Sung Ahn, Ji Eun Park, Si Un Lee, M. H. Kim, Wonhyoung Park, Seungjoo Lee, Yeongu Chung, and Jung Cheol Park
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Adult ,Male ,medicine.disease_cause ,law.invention ,Selenium ,03 medical and health sciences ,0302 clinical medicine ,Hematoma ,Randomized controlled trial ,law ,Edema ,Humans ,Medicine ,Cerebral Hemorrhage ,Advanced and Specialized Nursing ,Intracerebral hemorrhage ,chemistry.chemical_classification ,Reactive oxygen species ,business.industry ,030208 emergency & critical care medicine ,Free Radical Scavengers ,Middle Aged ,medicine.disease ,Scavenger (chemistry) ,Acetylcysteine ,Oxidative Stress ,Treatment Outcome ,chemistry ,Anesthesia ,Female ,Neurology (clinical) ,medicine.symptom ,Reactive Oxygen Species ,Cardiology and Cardiovascular Medicine ,business ,030217 neurology & neurosurgery ,Oxidative stress - Abstract
Background and Purpose: Patients with intracerebral hemorrhage (ICH) have oxidative stress. Oxidative stress contributes to the development and progression of perihematomal edema (PHE) in brain hemorrhage patients. We hypothesized that reactive oxygen species (ROS) scavengers might have a neuroprotective role in the acute period of patients with ICH. Methods: This prospective, multicenter, single-blind, randomized study was conducted between June 2017 and October 2019. Intracranial bleeding, including spontaneous ICH, secondary ICH due to vascular anomalies, venous thrombosis, neoplasms, or hemorrhagic infarction, were included in our study. These ROS scavengers were given for 14 days with a dose of N-acetylcysteine 2000 mg/d and selenium 1600 µg/d intravenously. Other patients received a placebo. The primary outcome was hemorrhage and PHE volume changes in 2-week follow-up computed tomography between ROS scavenger versus placebo groups. Results: In total, 448 patients were enrolled with 123 patients remaining after applying the inclusion and exclusion criteria. There were no significant differences in baseline characteristics between the ROS scavenger (n=57) and placebo (n=66) groups. No significant differences in baseline hematoma and PHE volumes were observed but 2 weeks follow-up computed tomography showed significant differences in PHE volume (21.90±17.63 versus 30.66±32.35, P P P P Conclusions: ROS scavenger showed a significantly reduced PHE volume, time to reach target Richmond Agitation Sedation Scale, and shortened length of intensive care unit stay in patients with acute ICH. Early and high doses of ROS scavengers in a combination regimen may have played a key role in obtaining a favorable outcome in our study. Registration: URL: https://cris.nih.go.kr/cris/en ; Unique identifier: KCT0004628.
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- 2021
19. ENDOSCOPIC ULTRASOUND-GUIDED THROUGH-THE-NEEDLE MICROFORCEP BIOPSY IMPROVES THE CATEGORIZATION OF THE TYPE OF PANCREATIC CYSTIC LESIONS
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S.H. Cho, T.J. Song, D.-W. Seo, D. Oh, D.H. Park, S.S. Lee, S.K. Lee, and M.-H. Kim
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- 2022
20. Factors Affecting the Time Taken to Determine Brain Death in Patients with Impending Brain Death
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Wonhyun Cho, Young-Soo Kim, Dohyung Kim, Tae-Won Yang, Jeongrim Lee, M H Kim, and Oh-Young Kwon
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Pediatrics ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,organ transplantation ,craniotomy ,Mean age ,Organ transplantation ,Transplantation ,03 medical and health sciences ,0302 clinical medicine ,Neurology ,medicine ,brain death ,In patient ,Original Article ,030212 general & internal medicine ,Neurology (clinical) ,Organ donation ,movement ,business ,030217 neurology & neurosurgery ,Craniotomy ,time - Abstract
Background and purpose The increased demand for donor organs has made it crucial to keep the organs of patients with impending brain death (PWIBDs) suitable for transplantation during the process of determining brain death. This study aimed to identify the time taken to determine brain death (TT-BD) in PWIBDs and the associated influencing factors. Methods This study analyzed data collected by the Korean Organ Donation Agency from 15 hospitals in the Yeongnam region of South Korea. There were 414 PWIBDs eligible for inclusion in this study. The data consisted of the TT-BD for PWIBDs and the potential variables influencing the TT-BD. Results The mean age of the 414 PWIBDs was 48.9 years, and 120 of them were female (29.0%). The mean TT-BD was 8.5 days. The presence of spontaneous movements (SMs) and craniotomy significantly affected the TT-BD. The mean TT-BDs were 13.9 and 8.2 days in the PWIBDs with and without SMs, respectively, and 9.8 and 8.0 days in the PWIBDs with and without craniotomy, respectively. Conclusions The SMs in PWIBDs and a craniotomy performed immediately before starting the process of determining brain death seem to be related to lengthening the TT-BD.
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- 2020
21. Role of gamma knife radiosurgery for recurrent or residual World Health Organization grade II and III intracranial meningiomas
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Chang Jin Kim, M. H. Kim, Do Hoon Kwon, Young Hyun Cho, Jeong Hoon Kim, and Sung Woo Roh
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Adult ,Male ,medicine.medical_specialty ,medicine.medical_treatment ,Gamma knife radiosurgery ,Gamma knife ,Radiosurgery ,World Health Organization ,World health ,Meningioma ,03 medical and health sciences ,0302 clinical medicine ,Meningeal Neoplasms ,medicine ,Humans ,Aged ,Retrospective Studies ,business.industry ,Role ,General Medicine ,Middle Aged ,medicine.disease ,Treatment Outcome ,030220 oncology & carcinogenesis ,Female ,Surgery ,Neurology (clinical) ,Radiology ,Neoplasm Recurrence, Local ,business ,030217 neurology & neurosurgery ,Follow-Up Studies - Abstract
Background: To analysis the role of gamma knife radiosurgery (GKRS) in treatment of the recurrent or residual World Health Organization (WHO) grade II and III meningiomas.Methods: Between 1995 and ...
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- 2020
22. Reflex and Spontaneous Movements of Patients in the Process of Determining Brain Death
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Do-Hyung Kim, Youngsoo Kim, Oh-Young Kwon, Soo-Kyoung Kim, Juhyeon Kim, Won Hyun Cho, Jeongrim Lee, Tae-Won Yang, and M H Kim
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business.industry ,Movement (music) ,Spontaneous movements ,Reflex ,Medicine ,business ,Process (anatomy) ,Neuroscience - Published
- 2019
23. Status and Prospects of the LHCf and RHICf experiments
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Yuki Shimizu, Yoshitaka Itow, Byungsik Hong, Kenta Sato, S. B. Ricciarini, Takashi Sako, Shoji Torii, Paolo Papini, Y. Goto, I. Nakagawa, M. Ueno, M. H. Kim, R. Seidl, Massimo Bongi, Raffaello D'Alessandro, Eugenio Berti, W. C. Turner, Alessia Tricomi, Moe Kondo, Hiroaki Menjo, Kiyoshi Tanida, Ken Ohashi, Yasushi Muraki, Katsuaki Kasahara, T. Tamura, Alessio Tiberio, G. Castellini, Maurice Haguenauer, Kenji Yoshida, Yutaka Matsubara, Lorenzo Bonechi, Nobuyuki Sakurai, and O. Adriani
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Physics ,Physics::Instrumentation and Detectors ,High Energy Physics::Experiment ,Detectors and Experimental Techniques ,Nuclear Experiment ,Particle Physics - Experiment - Abstract
Precise understanding of hadronic interactions at high energies is a key to improve mass composition measurements of very high energy cosmic-rays and to solve the muon excess issue observed in high energy cosmic-ray experiments using an air-shower technique. The LHCf and RHICf experiments measures the differential production cross sections of very forward neutral particle as photons, neutral pions and neutrons at LHC and RHIC, respectively. These data are critically important to test and tune hadronic interaction models used for air-shower simulations. In this presentation, we introduce the recent results of both the experiments as well as our future operation plans. LHCf published an updated result of forward neutron measurement at pp, $\sqrt{s}$ = 13 TeV. From the observed neutron energy spectra, we also obtained the average inelasticity, which is one of the key parameters for air shower development, as 0.536 +0.031-0.037. In addition, several analysis are on-going; neutral pion measurement at pp, $\sqrt{s}$ = 13 TeV, central- forward correlation analysis with LHCf+ATLAS, photon measurement by RHICf. LHCf plans to have operations at $pp$ and $p$O during the LHC-Run3 period. At pp collisions, new silicon readout system will be introduced to improve the read-out speed, and 10 times more statistics of the previous operation in 2015 will be obtained. Thanks to high statistics, rare particles such as $\eta$, $K^0_s$ and $\Lambda$ will be addressed also. We also plan another operation at RHIC in 2024 with a new detector. The detector, a calorimeter composed of tungsten, Si pad and pixel layers, will have a much wider acceptance and higher sensitivity of $K^0_s$ measurement than the current detector.
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- 2021
24. An Artificial Intelligence Algorithm-Based Smartphone Application Can Help to Monitor Cough in Real Time
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M.-S. Yang, B.-K. Kim, M.-H. Kim, S.-H. Kim, C. Song, S.-Y. Kang, J.-W. Kwon, J.-S. Shim, S.M. Lee, H.-K. Park, M.R. Sher, and H.-W. Park
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Computer science ,Real-time computing ,Smartphone application - Published
- 2021
25. Efficacy and Safety of Honey Bee Venom (Apis mellifera) Dermal Injections to Treat Osteoarthritis Knee Pain and Physical Disability: A Randomized Controlled Trial
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Christopher M H Kim, Vicki J Conrad, Anna Jakubowska, Lydie L Hazan, and Agustin J Latorre
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medicine.medical_specialty ,animal structures ,Physical disability ,business.industry ,fungi ,food and beverages ,Venom ,Honey bee ,Osteoarthritis ,Physical function ,medicine.disease ,complex mixtures ,law.invention ,Honey bee venom ,Knee pain ,Complementary and alternative medicine ,Randomized controlled trial ,law ,Internal medicine ,behavior and behavior mechanisms ,medicine ,medicine.symptom ,business - Abstract
Objectives: To evaluate purified honey bee (Apis mellifera) venom (HBV) biotherapy for the treatment of osteoarthritis (OA) knee pain and physical function. Design and Patients: Five hundr...
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- 2019
26. Pediatric Intracranial Aneurysms: Favorable Outcomes Despite Rareness and Complexity
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M. H. Kim, Seungjoo Lee, Byung Duk Kwun, Jae Sung Ahn, Jung Cheol Park, Do Hoon Kwon, Wonhyoung Park, and Heui Seung Lee
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Male ,medicine.medical_specialty ,Adolescent ,Ruptured aneurysms ,Glasgow Outcome Scale ,Aneurysm, Ruptured ,Neurosurgical Procedures ,Cohort Studies ,03 medical and health sciences ,0302 clinical medicine ,Aneurysm ,medicine.artery ,medicine ,Humans ,Initial treatment ,Endovascular treatment ,Child ,Retrospective Studies ,business.industry ,Incidence (epidemiology) ,Intracranial Aneurysm ,medicine.disease ,Surgery ,Child, Preschool ,030220 oncology & carcinogenesis ,Cohort ,Female ,Neurology (clinical) ,Internal carotid artery ,business ,Carotid Artery, Internal ,030217 neurology & neurosurgery - Abstract
Objective Pediatric intracranial aneurysms (IAs) are rare and differ from their adult counterparts in terms of their aneurysmal characteristics, presentation, treatment, and outcomes. Their treatment is often more difficult and complex compared with that of adults. However, studies outlining the clinical effect of pediatric IAs remain sparse. Methods We retrospectively reviewed the data from patients aged ≤18 years admitted to our hospital from 2000 to 2017 with a diagnosis of IAs. Results From the sample of 8207 patients with an IA diagnosis, 26 patients with 33 IAs were involved. Our cohort included 17 males and 9 females, with a mean age of 12.5 years. The mean follow-up duration was 4 years and 3 months. Seven patients (26.92%) were assumed to have a traumatic origin for their IAs. Ruptured aneurysms were more common than unruptured ones (61.53% vs. 38.46%). Complex features were observed in 14 aneurysms (42.42%). Initially, microsurgical and endovascular treatment were both performed in 10 patients (38.46%). A good recovery was obtained in 16 patients (61.54%) as determined by the Glasgow outcome scale scores at the 6-month follow-up visits. The complete obliteration of aneurysms was observed in 17 patients (65.38%). Endovascular treatment was the initial treatment in 3 patients with incomplete obliteration. Conclusions The treatment of pediatric IAs is challenging and technically demanding owing to their discrete nature compared with adult IAs and the need for greater surgical skills. We found a male predominance, with internal carotid artery bifurcation as the most frequent location of the aneurysms. Despite the greater incidence of ruptured and complex aneurysm cases, many patients had experienced a good recovery at the 6-month follow-up examinations.
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- 2019
27. Performance of prototype neutron detectors for Large Acceptance Multi-Purpose Spectrometer at RAON
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H. H. Shim, Gyeonghwan Bak, H. S. Lee, Young Jun Kim, M. H. Kim, Byungsik Hong, Young-Jin Kim, B. Mulilo, Kyong Sei Lee, M. S. Ryu, Jamin Jo, Jung Keun Ahn, Jong Won Lee, Hanseul Lee, and Dong Ho Moon
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Physics ,Nuclear and High Energy Physics ,Spectrometer ,010308 nuclear & particles physics ,Astrophysics::High Energy Astrophysical Phenomena ,Nuclear Theory ,Scintillator ,Neutron radiation ,01 natural sciences ,Nuclear physics ,0103 physical sciences ,Physics::Accelerator Physics ,Incident energy ,Neutron detection ,High Energy Physics::Experiment ,Neutron ,Cosmic muons ,Nuclear Experiment ,010306 general physics ,Instrumentation - Abstract
The performance of the prototype modules of neutron detectors for the Large Acceptance Multi-Purpose Spectrometer (LAMPS) was investigated, using cosmic muons and neutron beams at 65 and 392 MeV, provided by the Research Center for Nuclear Physics (RCNP). The timing and position resolutions were estimated using cosmic muons as 309 ps and 4.8 cm, respectively. The energy resolution depended on the incident energy of neutrons: 1.3% at 65 MeV and 3.1% at 392 MeV. The neutron-detection efficiency also showed weak energy dependence as it decreased from (9.0 ± 1.6)% at 65 MeV to (6.3 ± 1.0)% at 392 MeV.
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- 2019
28. Impact of leader‐member‐exchange and team‐member‐exchange on nurses’ job satisfaction and turnover intention
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Y.‐J. Yi and M.‐H. Kim
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Adult ,Male ,Attitude of Health Personnel ,Interprofessional Relations ,media_common.quotation_subject ,Personnel Turnover ,Organizational culture ,Job Satisfaction ,InformationSystems_GENERAL ,03 medical and health sciences ,0302 clinical medicine ,Nursing ,Republic of Korea ,Humans ,Quality (business) ,030212 general & internal medicine ,Cooperative Behavior ,General Nursing ,media_common ,ComputingMilieux_THECOMPUTINGPROFESSION ,030504 nursing ,Multilevel model ,Attendance ,Middle Aged ,Organizational Culture ,ComputingMilieux_GENERAL ,Leadership ,Job performance ,Turnover intention ,Female ,Job satisfaction ,Descriptive research ,0305 other medical science ,Psychology - Abstract
Aim To investigate the impacts of leader-member exchange and team-member exchange on job satisfaction and turnover intention of nurses. Background Leader-member exchange refers to the quality of relationships between leaders and members of a team and studies on this have generally focused on the aspect of member-leader-member exchanges. In nursing, the latter can refer to a situation where nurses (members) evaluate their relationship with their head nurse (leader). Member-leader-member exchange affects job satisfaction and turnover intention of nurses. However, even though all of these types of exchanges are important, few studies have examined their effects on job satisfaction and the turnover intention of nurses. Methods Participants in this descriptive study were 40 head nurses and 284 clinical nurses working at three hospitals in Korea. Data were collected from a questionnaire and analysed using hierarchical multiple regression. Results Leader-leader-member exchange, member-leader-member exchange, and team-member exchange had a positive effect on job satisfaction. However, only leader-leader-member exchange and member-leader-member exchange affected turnover intention. Conclusions The impacts of leader-leader-member exchange, team-member exchange, and member-leader-member exchange on job satisfaction were confirmed. To reduce turnover intention, our study found it is more important to improve leader-member exchange than team-member exchange. Implications for nursing practice In health organizations, there is an important need to focus on the communication and exchange relationships between leaders and their staff, well as among the members, to increase job satisfaction. This will assist leaders to play an important role in lowering nurses' turnover intention and create an organizational culture in which nurses can communicate well with them. Implications for nursing policy Policy changes are needed so that the components of job performance evaluation for nurse leaders also include attendance at regular programmes, such as training to improve their leadership and communication skills, and consultations with their staff members.
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- 2018
29. J-PARC E07: Systematic Study of Double Strangeness System with Hybrid Emulsion Method
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Megumi Naruki, R. Kiuchi, Kazuya Watanabe, S. H. Hwang, A. Koshikawa, Y. Sasaki, J. W. Lee, K. Ito, A. Iskendir, Yuki Sato, A. N. L. Nyaw, T. Nanamura, T. Takeda, Shoichi Hasegawa, S. Y. Matsumoto, Junya Yoshida, Yuki Fujikawa, M. Ichikawa, Masahiro Yoshimoto, Manabu Moritsu, Takayoshi Kawai, Hiroki Ito, K. Miwa, Hitoshi Takahashi, Y. Ogura, Hiroyuki Ekawa, C. S. Yoon, K. Imai, K. Inaba, D. H. Zhang, H. Kanauchi, W. S. Jung, Yoshiro Takahashi, Hitoshi Sugimura, Kazuma Nakazawa, T. Hashimoto, Manami Fujita, J. Y. Sohn, Jihwa Lee, Shunsuke Kanatsuki, K. Tanida, H. Sako, T. L. Ma, T. Hayakawa, A. T. Moe, M. Hirose, S. Kinbara, D. Nakashima, M. H. Kim, K. Oue, Y. Nakada, T. J. Moon, M. Minakawa, Myint Kyaw Soe, T. Takahashi, K. Agari, E. Umezaki, Toyoki Watabe, Seongbae Yang, S. Ashikaga, Y. C. Han, Yoshikazu Ishikawa, Mifuyu Ukai, M. Ohashi, Masaharu Ieiri, Kazuhiro Suzuki, Aye Moh Moh Theint, Kensuke Kobayashi, M. M. Soe, K. Hosomi, Manami Nakagawa, K. Hicks, S. Hoshino, Kotaro Shirotori, Yuya Akazawa, S. Y. Ryu, S. H. Kim, E. Hayata, B. Bassalleck, A. Kasagi, Z. Zhang, J. K. Ahn, J. Pochodzalla, Khin Than Tint, Shuhei Hayakawa, T. O. Yamamoto, Takeshi Koike, Y. Toyama, S. Sato, S. Ozawa, N. Fujioka, Ryotaro Honda, Yoko Endo, Y. Ichikawa, T. Akaishi, K. Hoshino, Erina Hirose, S. Bleser, Y. Nagase, Hitoshi Tamura, F. Schupp, Hidetaka Kobayashi, and R. Goto
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Nuclear physics ,Physics ,Emulsion ,J-PARC ,Strangeness - Published
- 2021
30. Observation of Coulomb-Assisted Nuclear Bound State of Ξ−–N14 System
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S. Bleser, Hitoshi Sugimura, S H Hayakawa, T. Takeda, T. L. Ma, H. Kanauchi, D. H. Zhang, Junya Yoshida, T. Hayakawa, Z. Zhang, Khin Than Tint, M. Minakawa, M. H. Kim, M. Hirose, T. J. Moon, S. Y. Matsumoto, R. Kiuchi, T. Takahashi, Manami Nakagawa, E. Hayata, Jihwa Lee, Y. Nakada, Hitoshi Tamura, F. Schupp, Hidetaka Kobayashi, Hiroyuki Ekawa, K. Agari, Yudai Ichikawa, M. Ohashi, Kotaro Shirotori, Yoko Endo, B. Bassalleck, A. Kasagi, Satoshi Sato, R. Goto, E. Umezaki, K. Ito, Manabu Moritsu, S. Ashikaga, Yuya Akazawa, Masahiro Yoshimoto, Yoshikazu Ishikawa, K. Miwa, Hiroyuki Sako, Yuki Fujikawa, M. Ichikawa, J. Pochodzalla, S. Y. Ryu, A. T. Moe, Kenichi Imai, Hiroki Ito, Kazuya Watanabe, Takashi Yamamoto, S. H. Hwang, K. Inaba, S. Ozawa, N. Fujioka, S. H. Kim, Hitoshi Takahashi, Erina Hirose, Shoichi Hasegawa, Y. Nagase, R Honda, Seongbae Yang, K. Hicks, S. Hoshino, T. Hashimoto, J. Y. Sohn, T. Akaishi, Yuki Sato, A. N. L. Nyaw, T. Nanamura, Shunsuke Kanatsuki, Y. Toyama, Aye Moh Moh Theint, M. M. Soe, Myint Kyaw Soe, Takeshi Koike, Y Han, J. K. Ahn, Kenji Hosomi, Kensuke Kobayashi, S. Kinbara, K. Hoshino, Megumi Naruki, A. Koshikawa, K. Tanida, C. S. Yoon, Manami Fujita, D. Nakashima, K. Oue, Toyoki Watabe, W. S. Jung, Kazuma Nakazawa, Takayoshi Kawai, Y. Ogura, Mifuyu Ukai, and Kazuhiro Suzuki
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Physics ,Binding energy ,Hyperon ,General Physics and Astronomy ,State (functional analysis) ,Coupling (probability) ,01 natural sciences ,0103 physical sciences ,Bound state ,Coulomb ,Absorption (logic) ,Atomic physics ,010306 general physics ,Energy (signal processing) - Abstract
In an emulsion-counter hybrid experiment performed at J-PARC, a Ξ^{-} absorption event was observed which decayed into twin single-Λ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as Ξ^{-}+^{14}N→_{Λ}^{10}Be+_{Λ}^{5}He. For the binding energy of the Ξ^{-} hyperon in the Ξ^{-}-^{14}N system a value of 1.27±0.21 MeV was deduced. The energy level of Ξ^{-} is likely a nuclear 1p state which indicates a weak ΞN-ΛΛ coupling.
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- 2021
31. Observation of Variations in Cosmic Ray Single Count Rates During Thunderstorms and Implications for Large-Scale Electric Field Changes
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R. U. Abbasi, T. Abu-Zayyad, M. Allen, Y. Arai, R. Arimura, E. Barcikowski, J. W. Belz, D. R. Bergman, S. A. Blake, I. Buckland, R. Cady, B. G. Cheon, J. Chiba, M. Chikawa, T. Fujii, K. Fujisue, K. Fujita, R. Fujiwara, M. Fukushima, R. Fukushima, G. Furlich, N. Globus, R. Gonzalez, W. Hanlon, M. Hayashi, N. Hayashida, K. Hibino, R. Higuchi, K. Honda, N. Husseini, D. Ikeda, T. Inadomi, N. Inoue, T. Ishii, H. Ito, D. Ivanov, H. Iwakura, A. Iwasaki, H. M. Jeong, S. Jeong, H. Johnson, C. C. H. Jui, K. Kadota, F. Kakimoto, O. Kalashev, K. Kasahara, S. Kasami, H. Kawai, S. Kawakami, S. Kawana, K. Kawata, I. Kharuk, E. Kido, H. B. Kim, J. H. Kim, M. H. Kim, S. W. Kim, Y. Kimura, S. Kishigami, Y. Kubota, S. Kurisu, V. Kuzmin, M. Kuznetsov, Y. J. Kwon, K. H. Lee, R. LeVon, B. Lubsandorzhiev, J. P. Lundquist, K. Machida, H. Matsumiya, T. Matsuyama, J. N. Matthews, R. Mayta, J. Mazich, M. Minamino, K. Mukai, I. Myers, P. Myers, S. Nagataki, K. Nakai, R. Nakamura, T. Nakamura, Y. Nakamura, A. Nakazawa, E. Nishio, T. Nonaka, K. O’Brien, H. Oda, S. Ogio, M. Ohnishi, H. Ohoka, Y. Oku, T. Okuda, Y. Omura, M. Ono, R. Onogi, A. Oshima, S. Ozawa, I. H. Park, M. Potts, M. S. Pshirkov, J. Remington, D. C. Rodriguez, G. I. Rubtsov, D. Ryu, H. Sagawa, R. Sahara, Y. Saito, N. Sakaki, T. Sako, N. Sakurai, K. Sano, K. Sato, T. Seki, K. Sekino, P. D. Shah, Y. Shibasaki, F. Shibata, N. Shibata, T. Shibata, H. Shimodaira, B. K. Shin, H. S. Shin, D. Shinto, J. D. Smith, P. Sokolsky, N. Sone, B. T. Stokes, T. A. Stroman, Y. Takagi, Y. Takahashi, M. Takamura, M. Takeda, R. Takeishi, A. Taketa, M. Takita, Y. Tameda, H. Tanaka, K. Tanaka, M. Tanaka, Y. Tanoue, S. B. Thomas, G. B. Thomson, P. Tinyakov, I. Tkachev, H. Tokuno, T. Tomida, S. Troitsky, R. Tsuda, Y. Tsunesada, Y. Uchihori, S. Udo, T. Uehama, F. Urban, T. Wong, M. Yamamoto, K. Yamazaki, J. Yang, K. Yashiro, F. Yoshida, Y. Yoshioka, Y. Zhezher, and Z. Zundel
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High Energy Astrophysical Phenomena (astro-ph.HE) ,Physics - Atmospheric and Oceanic Physics ,High Energy Physics - Experiment (hep-ex) ,Astrophysics::High Energy Astrophysical Phenomena ,Atmospheric and Oceanic Physics (physics.ao-ph) ,FOS: Physical sciences ,Astrophysics - High Energy Astrophysical Phenomena ,High Energy Physics - Experiment - Abstract
We present the first observation by the Telescope Array Surface Detector (TASD) of the effect of thunderstorms on the development of cosmic ray single count rate intensity over a 700 km$^{2}$ area. Observations of variations in the secondary low-energy cosmic ray counting rate, using the TASD, allow us to study the electric field inside thunderstorms, on a large scale, as it progresses on top of the 700 km$^{2}$ detector, without dealing with the limitation of narrow exposure in time and space using balloons and aircraft detectors. In this work, variations in the cosmic ray intensity (single count rate) using the TASD, were studied and found to be on average at the $\sim(0.5-1)\%$ and up to 2\% level. These observations were found to be both in excess and in deficit. They were also found to be correlated with lightning in addition to thunderstorms. These variations lasted for tens of minutes; their footprint on the ground ranged from 6 to 24 km in diameter and moved in the same direction as the thunderstorm. With the use of simple electric field models inside the cloud and between cloud to ground, the observed variations in the cosmic ray single count rate were recreated using CORSIKA simulations. Depending on the electric field model used and the direction of the electric field in that model, the electric field magnitude that reproduces the observed low-energy cosmic ray single count rate variations was found to be approximately between 0.2-0.4 GV. This in turn allows us to get a reasonable insight on the electric field and its effect on cosmic ray air showers inside thunderstorms.
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- 2021
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32. POS0856 CLINICAL UTILITY OF BREATH-HOLDING TEST FOR MEASURING CARDIOPULMONARY FUNCTION IN PATIENTS WITH SYSTEMIC SCLEROSIS
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Eunwon Lee, J. W. Park, J. Yeo, M. H. Kim, and Joo Kyung Park
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Rheumatology ,business.industry ,Anesthesia ,Immunology ,Immunology and Allergy ,Medicine ,In patient ,Cardiopulmonary function ,business ,General Biochemistry, Genetics and Molecular Biology ,Test (assessment) - Abstract
Background:Interstitial lung disease (ILD) and pulmonary arterial hypertension (PAH) are major causes of death in systemic sclerosis (SSc). Six-minute-walk test (6MWT) is a standard outcome measure for exercise capacity in cardiopulmonary diseases. However, the results of 6MWT may not reflect real cardiopulmonary function of SSc patients in whom musculoskeletal system is frequently inflicted.Objectives:This study aimed to evaluate the clinical utility of breath-holding test (BHT) in evaluating cardiopulmonary function in SSc patients, as compared with 6MWT.Methods:Seventy-two patients with SSc were prospectively enrolled and underwent BHT and 6MWT with measurement of Borg score and Scleroderma Health Assessment Questionnaire (SHAQ). Data on diffusing capacity for carbon monoxide (DLCO, %), forced vital capacity (FVC, % and liters), and ejection fraction and pulmonary arterial systolic pressure (PASP) measured by transthoracic echocardiography (TTE), were also collected. For BHT, participants were required to make a maximum expiration followed by a maximum inspiration and to hold the breath as long as possible at maximum inspiratory level. This procedure was repeated three times, with 5-minute intervals. 6MWT was performed according to the American Thoracic Society guidelines. Pearson’s correlation test was applied to demonstrate the relationship between BHT results and each clinical parameter.Results:Among 72 (66 female) patients, mean (SD) age was 57.1 (11.1) years, modified Rodnan skin score 10.6 (10.5), SHAQ 0.64 (0.61) and 6MWT distance 473.5 (95.5) m. Mean BHT time was 35.05 (14.90) sec at the first time, 38.92 (16.14) sec at the second time, and 41.11 (17.71) sec at the third time. The BHT time showed a statistically significant negative correlation with Borg scale (pre-test, r = -0.336, p = 0.002; post-test, r = -0.252, p = 0.034; Figure 1 and Table 1), while 6MWT showed a negative correlation with only post-test Borg scale (pre-test, r = -0.113 p = 0.343; post-test, r = -0.351 p = 0.002; Table 1). The BHT time was positively correlated with DLCO (%, r = 0.409, p < 0.001) and FVC (liters, r = 0.402, p < 0.001) (Table 1). We also found a statistically significant correlation between BHT time and SHAQ score (r = -0.451, p < 0.001; Table 1). However, EF and PASP by TTE showed no significant relationship with BHT time (EF, r = -0.108, p = 0.374; PASP, r = -0.246, p = 0.054; Table 1).Table 1.Pearson’s correlation coefficients (r) for the relation between BHT and clinical parameters in comparison to 6MWT.Pre-test Borg scalePost-test Borg scaleDLCO(%)FVC(L)FVC(%)FVC/DLCOEF(%)PSAP(mm Hg)SHAQ (score)BHT (sec)-0.366**-0.252*0.409***0.402**0.191-0.244***-0.108-0.246-0.451***6MWT (m)-0.113-0.351**0.297*0.321**0.063-0.250*0.137-0.354**-0.531***BHT, breath-holding test; 6MWT, 6-minute-walk test; DLCO, diffusing capacity for carbon monoxide; FVC, forced vital capacity; EF, ejection fraction estimated by transthoracic echocardiography; SHAQ, Scleroderma Health Assessment Questionnaire.* p < 0.05, ** p < 0.01, *** p < 0.001Figure 1.Association of Borg dyspnea scale with breath-holding time.Conclusion:The BHT is a simple, safe, and less time-consuming test, reflective of pulmonary parameters and SHAQ, as compared with 6MWT. Our results suggest that the BHT might be a useful surrogate marker of cardiopulmonary capacity in SSc patients.References:[1]Villalba WO, Sampaio-Barros PD, Pereira MC, Cerqueira EM, Leme CA, Jr., Marques-Neto JF, et al. Six-minute walk test for the evaluation of pulmonary disease severity in scleroderma patients. Chest. 2007;131(1):217-22.[2]Garin MC, Highland KB, Silver RM, Strange C. Limitations to the 6-minute walk test in interstitial lung disease and pulmonary hypertension in scleroderma. J Rheumatol. 2009;36(2):330-6.[3]Barnai M, Laki I, Gyurkovits K, Angyan L, Horvath G. Relationship between breath-hold time and physical performance in patients with cystic fibrosis. Eur J Appl Physiol. 2005;95(2-3):172-8.Acknowledgements:This study would not have been possible without help from research assistant, Sung-Soon Cho.Disclosure of Interests:Jina Yeo: None declared, Mi Hyeon Kim: None declared, Jun Won Park: None declared, Jin Kyun Park: None declared, Eun Bong Lee Consultant of: Pfizer, Grant/research support from: GC Pharma and Handok Inc.
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- 2021
33. Observation of Coulomb-Assisted Nuclear Bound State of Ξ^{-}-^{14}N System
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S H, Hayakawa, K, Agari, J K, Ahn, T, Akaishi, Y, Akazawa, S, Ashikaga, B, Bassalleck, S, Bleser, H, Ekawa, Y, Endo, Y, Fujikawa, N, Fujioka, M, Fujita, R, Goto, Y, Han, S, Hasegawa, T, Hashimoto, T, Hayakawa, E, Hayata, K, Hicks, E, Hirose, M, Hirose, R, Honda, K, Hoshino, S, Hoshino, K, Hosomi, S H, Hwang, Y, Ichikawa, M, Ichikawa, K, Imai, K, Inaba, Y, Ishikawa, H, Ito, K, Ito, W S, Jung, S, Kanatsuki, H, Kanauchi, A, Kasagi, T, Kawai, M H, Kim, S H, Kim, S, Kinbara, R, Kiuchi, H, Kobayashi, K, Kobayashi, T, Koike, A, Koshikawa, J Y, Lee, T L, Ma, S Y, Matsumoto, M, Minakawa, K, Miwa, A T, Moe, T J, Moon, M, Moritsu, Y, Nagase, Y, Nakada, M, Nakagawa, D, Nakashima, K, Nakazawa, T, Nanamura, M, Naruki, A N L, Nyaw, Y, Ogura, M, Ohashi, K, Oue, S, Ozawa, J, Pochodzalla, S Y, Ryu, H, Sako, S, Sato, Y, Sato, F, Schupp, K, Shirotori, M M, Soe, M K, Soe, J Y, Sohn, H, Sugimura, K N, Suzuki, H, Takahashi, T, Takahashi, T, Takeda, H, Tamura, K, Tanida, A M M, Theint, K T, Tint, Y, Toyama, M, Ukai, E, Umezaki, T, Watabe, K, Watanabe, T O, Yamamoto, S B, Yang, C S, Yoon, J, Yoshida, M, Yoshimoto, D H, Zhang, and Z, Zhang
- Abstract
In an emulsion-counter hybrid experiment performed at J-PARC, a Ξ^{-} absorption event was observed which decayed into twin single-Λ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as Ξ^{-}+^{14}N→_{Λ}^{10}Be+_{Λ}^{5}He. For the binding energy of the Ξ^{-} hyperon in the Ξ^{-}-^{14}N system a value of 1.27±0.21 MeV was deduced. The energy level of Ξ^{-} is likely a nuclear 1p state which indicates a weak ΞN-ΛΛ coupling.
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- 2020
34. Transverse Single-Spin Asymmetry for Very Forward Neutral Pion Production in Polarized p+p Collisions at s=510 GeV
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Takashi Sako, Yoshitaka Itow, Jongmin Lee, M. H. Kim, T. Ljubicic, N. Sakurai, R. Seidl, O. Adriani, K. Sato, Y. Makino, Eugenio Berti, Hiroaki Menjo, Raffaello D'Alessandro, I. Nakagawa, A. Ogawa, K. Tanida, Shoji Torii, Y. Goto, Lorenzo Bonechi, Q. D. Zhou, M. Ueno, K. Kasahara, J. S. Park, Alessia Tricomi, and Byung-Sik Hong
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Physics ,media_common.quotation_subject ,General Physics and Astronomy ,Asymmetry ,Momentum ,Nuclear physics ,Transverse plane ,Pion ,Pseudorapidity ,High Energy Physics::Experiment ,Nuclear Experiment ,Relativistic Heavy Ion Collider ,STAR detector ,media_common ,Spin-½ - Abstract
Transverse single-spin asymmetries of very forward neutral pions generated in polarized p+p collisions allow us to understand the production mechanism in terms of perturbative and nonperturbative strong interactions. During 2017, the RHICf Collaboration installed an electromagnetic calorimeter in the zero-degree region of the STAR detector at the Relativistic Heavy Ion Collider (RHIC) and measured neutral pions produced at pseudorapidity larger than 6 in polarized p+p collisions at sqrt[s]=510 GeV. The large nonzero asymmetries increasing both in longitudinal momentum fraction x_{F} and transverse momentum p_{T} have been observed at low transverse momentum p_{T}
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- 2020
35. Treatment outcome and risk factors associated with diffuse axonal injury in patients with moderate to severe head injury
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Suk-Kyung Hong, Sang Ryong Jeon, M. H. Kim, Seungjoo Lee, and Sung Woo Roh
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medicine.medical_specialty ,Univariate analysis ,Subarachnoid hemorrhage ,business.industry ,Traumatic brain injury ,Diffuse axonal injury ,Head injury ,Diffuse Axonal Injury ,Revised Trauma Score ,medicine.disease ,Magnetic Resonance Imaging ,Treatment Outcome ,Hematoma ,Risk Factors ,Internal medicine ,medicine ,Craniocerebral Trauma ,Humans ,Surgery ,Neurology (clinical) ,Stage (cooking) ,business - Abstract
Aim Diffuse axonal injury (DAI) is an important determining factor of morbidity and mortality after traumatic brain injury (TBI). However, its clinical outcome remains a subject of debate. Material and methods A total of 992 TBI patients visited our hospital between 2011 and 2016. Thirty-seven patients diagnosed with DAI were enrolled in this study and stratified by DAI stage: stage I, 20 patients (54.1%); stage II, 4 patients (10.8%); and stage III, 13 patients (35.1%). Results The mean age and the median follow-up period were 45.43 years and 13 months, respectively. Patient demographic data and clinical findings on admission showed no differences according to DAI stage, except for the revised trauma score (RTS) (p = 0.026). In univariate analysis, stages I and II vs. III (p = 0.001) and stages I vs. II and III (p = 0.019), transfusion within 24 hours of visit (p = 0.033), shock or cardiac arrest (p = 0.006), traumatic subarachnoid hemorrhage (T-SAH) (p = 0.011), and subdural hematoma (SDH) (p = 0.009) were significantly correlated with Glasgow outcome score (GOS). In multivariate analysis, DAI stage I and II vs. III (p = 0.005) and SDH (p = 0.040) were significant. Conclusion Clinically, stage II was more correlated with stage I, rather than stage III. Stage III showed a much poorer outcome compared to stages I and II. Magnetic resonance imaging (MRI) should be promptly performed in all TBI patients when a patient's level of consciousness and cranial computed tomography (CT) does not match, as there is a possibility of stage III DAI.
- Published
- 2020
36. Early (≤48 Hours) versus Late (>48 Hours) Surgery in Spinal Cord Injury: Treatment Outcomes and Risk Factors for Spinal Cord Injury
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Suk-Kyung Hong, M. H. Kim, Sang Ryong Jeon, Sung Woo Roh, and Seungjoo Lee
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Adult ,Male ,medicine.medical_specialty ,Time Factors ,Adolescent ,Treatment outcome ,Thoracic Vertebrae ,Time-to-Treatment ,Cohort Studies ,Young Adult ,03 medical and health sciences ,Early surgery ,0302 clinical medicine ,Spine surgery ,Risk Factors ,Humans ,Medicine ,Spinal cord injury ,Spinal Cord Injuries ,Aged ,Retrospective Studies ,Aged, 80 and over ,030222 orthopedics ,Lumbar Vertebrae ,business.industry ,Significant difference ,American Spinal Injury Association ,Retrospective cohort study ,Guideline ,Middle Aged ,Decompression, Surgical ,medicine.disease ,Surgery ,Treatment Outcome ,Cervical Vertebrae ,Female ,Neurology (clinical) ,business ,030217 neurology & neurosurgery - Abstract
Objectives Surgical management of spinal cord injury (SCI) is challenging. There is no standard guideline regarding the timing of surgery, although physicians have prioritized early surgery over the past decades. Although better outcomes have been observed from these studies, the definition of early surgery has been controversial, although mostly limited to 24-hours after injury. For some hospitals, this early surgery could be difficult to implement in practice. Hence, we re-evaluated the timing of early surgery as surgery within 48 hours and investigated the surgical outcomes of SCI depending on whether surgery was performed early (≤48 hours) or late (>48 hours). The primary outcomes were improvement in the American Spinal Injury Association Impairment Scale (AIS) grade in early and late surgery groups. Methods This study was a retrospective cohort study in individuals aged 15–85 years, who underwent surgery for SCI between 2005 and 2016. The rate of AIS grade improvements was measured at 6 months after injury. Of the 86 enrolled patients, 31 (mean, 40.9 ± 12.64 hours) and 55 (mean, 168.25 ± 93.01 hours) patients were assigned to the early and late surgery groups, respectively. Results AIS grade improvement was significantly greater in the early than in the late group (P = 0.039). In the early group, there was no significant difference in neurologic improvements among the AIS B, C, and D groups, but the AIS A group showed a significant improvement (P = 0.015). This finding was not observed in the late group (P = 0.060). AIS grade improvement was also significantly greater in the incomplete SCI group than in the complete SCI group, for all measurements (early, P = 0.007, late, P = 0.009). Other factors that significantly affected clinical outcomes were AIS grade on admission and the level of the injury.
- Published
- 2018
37. CU03-1001, 50% ethanol-extract of Moutan radices cortex and Cinnamomi ramulus (1:1) inhibited laser-induced choroidal neovascularization (CNV) in Brown Norway rats
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Y-G Kwon, C-S Kim, K Jo, Ji-Yul Kim, Jinmoo Kim, S-H Jung, M-H Kim, S-W Hyun, and IS Lee
- Subjects
chemistry.chemical_compound ,medicine.anatomical_structure ,Ethanol ,Choroidal neovascularization ,chemistry ,Cortex (anatomy) ,medicine ,BROWN NORWAY ,Pharmacology ,medicine.symptom - Published
- 2019
38. Correlation between Crossed Cerebellar Diaschisis and Prognosis of Functional Ambulation in Subacute Stroke Patients
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N. R. Yun, J. H. Kim, S. A. Park, Y. H. Lim, M. C. Joo, and M. H. Kim
- Subjects
Crossed cerebellar diaschisis ,medicine.medical_specialty ,business.industry ,Internal medicine ,Subacute stroke ,medicine ,Cardiology ,business ,medicine.disease ,Stroke - Published
- 2018
39. The Reliability and Validity of Revised Cognitive Perceptual Assessment for Driving(CPAD2)
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J. H. Bae, H. S. Han, J. A. Lee, J. J. Kim, M. H. Kim, J. J. Lee, D. A. Kim, H. L. Kim, M. H. Lim, and H. Choi
- Subjects
Perception ,media_common.quotation_subject ,Cognition ,Psychology ,Reliability (statistics) ,media_common ,Cognitive psychology - Published
- 2018
40. Search for Excited State of \(_{\Sigma }^{4}\text{He}\) Hypernucleus in the J-PARC E13 Experiment
- Author
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S. Marcello, S. Suto, Manami Nakagawa, Sho Nagao, Manami Fujita, N. Amano, Ryotaro Honda, Hiroyuki Ekawa, Toshiyuki Gogami, Hirokazu Tamura, Shin Hyung Kim, Shoichi Hasegawa, Shinji Kinbara, Hitoshi Sugimura, Y. Ogura, Kiyoshi Tanida, Tomofumi Nagae, Yudai Ichikawa, T. Shiozaki, Y. Sasaki, Alessandro Feliciello, Michihiko Ikeda, Z. Tsamalaidze, Yasutaka Yamamoto, Shunsuke Kanatsuki, Sanghoon Hwang, Susumu Sato, Petr Evtoukhovitch, Takeshi O. Yamamoto, Shoji Suzuki, N. Ichige, M. H. Kim, T. J. Moon, Michelangelo Agnello, Jae-Yong Lee, Kotaro Shirotori, Yuya Akazawa, Takeshi Koike, Shuhei Hayakawa, Kanae Aoki, Elena Botta, Kenichi Imai, Mifuyu Ukai, Y. Nakada, Kosuke Tanabe, Hiroyuki Sako, Shigeru Ishimoto, Seongbae Yang, Nobuyuki Chiga, Atsushi Sakaguchi, Koji Miwa, Tomonari Hayakawa, Kenji Hosomi, and Toshiyuki Takahashi
- Subjects
Nuclear physics ,Physics ,Excited state ,Sigma ,J-PARC ,Hypernucleus - Published
- 2019
41. Degradation analysis of doped organic p-n heterojunction charge generation layers by impedance and optical spectroscopy
- Author
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M.-H. Kim, E.-J. Jang, J. Lee, J.-H. Lee, Y.-J. Lim, Akpeko Gasonoo, and Y. Choi
- Subjects
Materials science ,Tandem ,Renewable Energy, Sustainability and the Environment ,business.industry ,Materials Science (miscellaneous) ,Doping ,Energy Engineering and Power Technology ,Heterojunction ,Capacitance ,Molybdenum trioxide ,Organic semiconductor ,chemistry.chemical_compound ,Fuel Technology ,Nuclear Energy and Engineering ,chemistry ,Optoelectronics ,Rubidium carbonate ,business ,Spectroscopy - Abstract
Investigation of the long-term stability of charge generation layers (CGLs) provides a fundamental and an essential approach in achieving highly efficient tandem organic electronic devices. Thus, in this foremost study, the degradation mechanism of electrically aged organic p-n heterojunction CGLs has been investigated by impedance and optical spectroscopy. Rubidium carbonate (Rb 2CO3)–doped 2,2,2-(1,3,5-benzinetriyl)-tris(1-phenyl-1H-benzimidazole) (TPBi) and molybdenum trioxide (MoO3 )–doped 1,4-bis[N-(1-naphthyl)-N′-phenylamino]-4,4′-diamine (NPB) are used as the n-type and p-type organic semiconductors , respectively. A detailed analysis from capacitance-frequency ( C–F) and capacitance-voltage (C–V) characteristics reveals reduced charge generation and 19.6% reduction in the geometric capacitance of the CGL after electrical aging. Reduced peak intensity from UV–Vis–NIR spectra of the aged CGL points to 21.4% charge transfer complex decomposition of the Rb2CO3 -doped TPBi. We propose that the rate-limiting step of charge generation in the CGL is caused by the electron transport in the TPBi:Rb 2CO3 layer and not the charge generation itself at the TPBi:Rb2CO3/NPB:MoO3 heterojunction. This simple, comprehensive, and non-destructive technique facilitates a crucial analysis that underpins the mechanism of device degradation and further provides a fundamental approach in developing highly stable CGLs for efficient organic electronic devices.
- Published
- 2021
42. Modular and efficient ozone systems based on massively parallel chemical processing in microchannel plasma arrays: performance and commercialization
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Jin Hoon Cho, M. H. Kim, James Gary Eden, and S. J. Park
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0301 basic medicine ,Chemical process ,Microchannel ,Materials science ,Nanoporous ,business.industry ,Microplasma ,030106 microbiology ,Electrical breakdown ,General Physics and Astronomy ,Nanotechnology ,Chip ,03 medical and health sciences ,030104 developmental biology ,Optoelectronics ,General Materials Science ,Physical and Theoretical Chemistry ,business ,Massively parallel ,Plasma processing - Abstract
Plasmachemical systems based on the production of a specific molecule (O3) in literally thousands of microchannel plasmas simultaneously have been demonstrated, developed and engineered over the past seven years, and commercialized. At the heart of this new plasma technology is the plasma chip, a flat aluminum strip fabricated by photolithographic and wet chemical processes and comprising 24–48 channels, micromachined into nanoporous aluminum oxide, with embedded electrodes. By integrating 4–6 chips into a module, the mass output of an ozone microplasma system is scaled linearly with the number of modules operating in parallel. A 115 g/hr (2.7 kg/day) ozone system, for example, is realized by the combined output of 18 modules comprising 72 chips and 1,800 microchannels. The implications of this plasma processing architecture for scaling ozone production capability, and reducing capital and service costs when introducing redundancy into the system, are profound. In contrast to conventional ozone generator technology, microplasma systems operate reliably (albeit with reduced output) in ambient air and humidity levels up to 90%, a characteristic attributable to the water adsorption/desorption properties and electrical breakdown strength of nanoporous alumina. Extensive testing has documented chip and system lifetimes (MTBF) beyond 5,000 hours, and efficiencies >130 g/kWh when oxygen is the feedstock gas. Furthermore, the weight and volume of microplasma systems are a factor of 3-10 lower than those for conventional ozone systems of comparable output. Massively-parallel plasmachemical processing offers functionality, performance, and commercial value beyond that afforded by conventional technology, and is currently in operation in more than 30 countries worldwide.
- Published
- 2017
43. Reflex and Spontaneous Movements in Adult Patients during the Process of Determining Brain Death in Korea
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Tae-Won Yang, Wonhyun Cho, Young-Soo Kim, Oh-Young Kwon, M H Kim, Jung Sook Yeom, Jeongrim Lee, and Dohyung Kim
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Adult ,Male ,medicine.medical_specialty ,Brain Death ,Spontaneous movements ,Movement ,Organ transplantation ,03 medical and health sciences ,0302 clinical medicine ,Reflex ,Republic of Korea ,Medicine ,Humans ,In patient ,030212 general & internal medicine ,Adult patients ,business.industry ,General Medicine ,Middle Aged ,Blood pressure ,Anesthesia ,Clinical diagnosis ,Female ,Original Article ,Brainstem ,business ,Neuroscience - Abstract
Background Brain death is a clinical diagnosis that implies irreversible loss of function of the entire brain, including the brainstem and both hemispheres. Based on previous reports, it is not rare for reflex and spontaneous movements to occur in patients during the process of determining brain death. However, reports of the frequency and common types of these movements vary from study to study. Thus, we evaluated adult patients with impending brain death in Korea to determine the frequency and characteristics of reflex and spontaneous movements. Methods Brain dead patients who were admitted to 15 hospitals in the Yeongnam region (Southeast) of Korea were recruited prospectively from January 2013 to September 2016. All patients met the criteria for brain death as established by the Korea Medical Association. All body movements occurred during the process of diagnosing brain death and were assessed by physicians and trained organ transplant coordinators. The frequency and characteristics of these movements were identified and the demographic and clinical factors of impending brain dead patients with and without these movements were compared. Results A total of 436 patients who met the criteria for brain death were enrolled during the study period. Of these patients, 74 (17.0%) exhibited either reflex or spontaneous movements. Of this subset, 45 (60.8%) exhibited reflex movements only, 18 (24.3%) exhibited spontaneous movements only, and 11 (14.9%) exhibited both reflex and spontaneous movements. The most common reflex movements were the flexor/extensor plantar response and spinal myoclonus. Of the 74 patients, 52 (70.3%) exhibited one movement of the same pattern and 22 (29.7%) exhibited two or more different movement patterns. In addition, 45 (60.8%) exhibited these movements only on a limited area of the body with the leg being most common (n = 26, 57.8%). Patients with hypoxic brain damage and a higher systolic blood pressure exhibited significantly more reflex or spontaneous movements. Conclusion Movements associated with brain dead patients are not rare and thus an awareness of these movements is important to brain death diagnosis. Physicians who perform brain death examinations should understand the frequency and characteristics of these movements to reduce delays in determining brain death., Graphical Abstract
- Published
- 2019
44. Anaphylactic Shock After Indocyanine Green Video Angiography During Cerebrovascular Surgery
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Jae Sung Ahn, Joung-Uk Kim, Seung Il Ha, M. H. Kim, Seungjoo Lee, Jung Cheol Park, Wonhyoung Park, and Dong-Min Jang
- Subjects
Indocyanine Green ,genetic structures ,Provocation test ,Neurosurgical Procedures ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Aneurysm ,Medicine ,Humans ,Anaphylaxis ,Dexamethasone ,Aged ,medicine.diagnostic_test ,business.industry ,Angiography, Digital Subtraction ,Intracranial Aneurysm ,Middle Aged ,medicine.disease ,eye diseases ,Cerebral Angiography ,body regions ,Blood pressure ,chemistry ,030220 oncology & carcinogenesis ,Anesthesia ,Angiography ,Surgery ,Female ,Neurology (clinical) ,business ,Cerebrovascular surgery ,Indocyanine green ,030217 neurology & neurosurgery ,medicine.drug - Abstract
Background Indocyanine green (ICG) video angiography has been widely used in cerebrovascular surgery. ICG injection is generally safe, with a low incidence of complications. ICG-related anaphylactic reactions during neurosurgery have been rarely reported. We report the cases of 2 patients who had experienced anaphylactic shock in response to intravenous ICG injection (DID Indocyanine Green [Dongindang, Inc., Gyeonggi-do, Republic of Korea]) during intracranial aneurysm (IA) surgery. Case Description The first patient, a 69-year-old woman with an unruptured IA, had been undergoing clipping surgery under general anesthesia. Immediately after ICG injection, her blood pressure suddenly decreased from 140/80 mm Hg to 50/30 mm Hg and she developed a skin rash on her abdomen and all extremities. Chest compression was initiated, and her vital signs gradually recovered to their pre-ICG levels within 10 minutes. The second patient was a 58-year-old woman with an unruptured IA who had been undergoing clipping surgery. After ICG injection, her blood pressure had decreased from 130/80 mm Hg to 60/40 mm Hg, and a rash-like skin lesion was observed on her abdomen. After intravenous injection of norepinephrine and dexamethasone, her blood pressure recovered to its pre-ICG level within 30 minutes and remained stable thereafter. The postoperative ICG skin provocation test findings were positive for both patients; however, only 1 patient showed markedly increased serum tryptase levels. Conclusion Despite the rarity of ICG-related anaphylaxis, clinicians should be aware of this unexpected, but potentially life-threatening, drug reaction in patients undergoing cerebrovascular surgery.
- Published
- 2019
45. The energy spectrum of forward photons measured by the RHICf experiment in $\sqrt{s}$ = 510 GeV proton-proton collisions
- Author
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Y. Goto, Alessia Tricomi, N. Sakurai, Hiroaki Menjo, Kenta Sato, Raffaello D'Alessandro, Takashi Sako, Junsang Park, O. Adriani, I. Nakagawa, Shoji Torii, M. Ueno, Katsuaki Kasahara, Eugenio Berti, Kiyoshi Tanida, M. H. Kim, Byungsik Hong, Lorenzo Bonechi, R. Saidl, Ken Ohashi, and Yoshitaka Itow
- Subjects
Physics ,Nuclear physics ,Photon ,Proton ,Hadron ,Monte Carlo method ,Energy spectrum ,High Energy Physics::Experiment ,Nuclear Experiment ,Relativistic Heavy Ion Collider ,Energy (signal processing) ,Particle identification - Abstract
The Relativistic Heavy Ion Collider forward (RHICf) experiment aims at understanding the high-energy hadronic interaction by measuring the cross sections of very forward neutral particles in proton-proton collisions at $\sqrt{s}$ = 510 GeV. For the analysis of the photon measurement, the trigger efficiency and the particle identification performance are studied by using the Monte Carlo simulation data and the experimental data. In the RHICf operation, two kinds of trigger modes (Shower, HighEM) were implemented. The trigger efficiency of the Shower trigger is 100$\%$ for photons with the energies more than 20 GeV. The HighEM trigger is designed to detect high energy photons effectively, and the trigger efficiency of the HighEM trigger is 90$\%$ for photons with the energies more than 130 GeV. The correction factor for the photon identification is calculated by using the efficiency and purity. It is found that this correction does not make a sizeable effect on the shape of the energy spectrum because the energy dependency of the factor is small.
- Published
- 2019
46. Efficacy and Safety of Honey Bee Venom (
- Author
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Vicki J, Conrad, Lydie L, Hazan, Agustin J, Latorre, Anna, Jakubowska, and Christopher M H, Kim
- Subjects
Male ,Bee Venoms ,Double-Blind Method ,Injections, Intradermal ,Knee Joint ,Humans ,Female ,Middle Aged ,Osteoarthritis, Knee ,Acupuncture Points ,Arthralgia ,Aged ,Pain Measurement - Published
- 2019
47. Dominance of the Anterior Cerebral Artery as a Predictor of Vasospasm-Related Cerebral Infarction After Surgical Treatment of Ruptured Blood Blister-Like Aneurysm in the Internal Carotid Artery
- Author
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Jung Cheol Park, Wonhyoung Park, Seungjoo Lee, Heui Seung Lee, Jae Sung Ahn, and M. H. Kim
- Subjects
Adult ,Male ,medicine.medical_specialty ,Subarachnoid hemorrhage ,Anterior Cerebral Artery ,medicine.medical_treatment ,Infarction ,Aneurysm, Ruptured ,Brain Ischemia ,03 medical and health sciences ,0302 clinical medicine ,Aneurysm ,medicine.artery ,Anterior cerebral artery ,Medicine ,Humans ,Vasospasm, Intracranial ,cardiovascular diseases ,Retrospective Studies ,Cerebral Revascularization ,business.industry ,Cerebral infarction ,Vasospasm ,Clipping (medicine) ,Middle Aged ,medicine.disease ,Embolization, Therapeutic ,Surgery ,Cerebral Angiography ,030220 oncology & carcinogenesis ,cardiovascular system ,Female ,Neurology (clinical) ,Internal carotid artery ,business ,030217 neurology & neurosurgery ,Carotid Artery, Internal - Abstract
Objective Vasospasm (VSP)-related ischemic complications have been associated with poor outcomes in patients with subarachnoid hemorrhage due to ruptured blood blister-like aneurysms (BBAs) in the communicating segment of the internal carotid artery (ICA). The purpose of the present study was to investigate the incidence of, and factors related to, VSP-related cerebral infarction (VSP-CI) in patients with surgically treated BBAs in the communicating segment of the ICA. Methods The medical records of 25 consecutive patients with surgically treated BBAs in the communicating segment of the ICA were reviewed. The preoperative angiographic findings, surgical methods, and patient outcomes, including VSP-CI, were evaluated. Results Of the 25 patients, 10 had undergone extracranial–intracranial (EC-IC) bypass with trapping and 15 had undergone clipping surgery. VSP-CI occurred in the ipsilateral hemisphere to the aneurysm in 4 patients with EC-IC bypass with trapping and in 6 patients who had undergone received clipping. Positive balloon test occlusion findings did not affect the occurrence of VSP-CI in the EC-IC bypass and trapping group. The occurrence of VSP-CI was significantly greater in the patients with a dominant anterior cerebral artery ipsilateral to the aneurysm on the preoperative angiogram (P = 0.023), with a hazard ratio of 14.14 (95% confidence interval, 1.57–127.68). Conclusions The results of preoperative balloon test occlusion were less reliable for predicting postoperative ischemic complications of EC-IC bypass with trapping in patients with ruptured BBAs in the communicating segment of the ICA. However, anterior cerebral artery dominance ipsilateral to the ruptured aneurysm could be predictive for postoperative VSP-CI.
- Published
- 2019
48. Abstract WP333: Endothelium-Specific Sox17 Deletion Ameliorates ALK1-mediated Arteriovenous Malformation (AVM)
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M. H. Kim, Jae Sung Ahn, Wonhyoung Park, and Seungjoo Lee
- Subjects
Advanced and Specialized Nursing ,Endothelium ,business.industry ,Arteriovenous malformation ,medicine.disease ,Cell biology ,Adherens junction ,medicine.anatomical_structure ,medicine ,Neurology (clinical) ,Cardiology and Cardiovascular Medicine ,Cytoskeleton ,business ,Gene - Abstract
Introduction: Sox17 promotes endothelial migration by destabilizing endothelial adherens junctions, rearranging cytoskeletal structure and upregulates expression of a number of genes preferentially expressed in angiogenic tip cells. However, the deletion of Sox17 stabilizes endothelial junctions and decreased proliferation, vice versa. The AVM after endothelial Alk1 deletion shows uncontrolled endothelial proliferation and cytoskeletal misarrangement. Therefore, we hypothesized that deletion of Sox17 in endothelial cells are sufficient to ameliorate brain AVM via Notch pathway modulation. Methods: Alk1 2f/2f Sox17 2f/2f double transgenic mice (Alk1 exons 4-6 flanked by loxP sites) were bred with VEcad-iCreER T2 mice that express tamoxifen-inducible cre re-combinase (iCreER) in EC. EC-Alk1 and Sox17 deletion was induced by intraperitoneal injection of tamoxifen (25mg/kg, Sigma-Aldrich) with interval of 3 days. The spatiotemporal changes of blood vessel were investigated in Alk1 deletion alone and Alk1-Sox17 co-deletion mice. Vascular morphology was analyzed 9 days after tamoxifen administration. The transcripts (mRNA) and protein expression of target molecules of Notch pathway (Dll4, Hey1, Hey2, NIICD) were also evaluated. Results: The dysplastic blood vessel index of solitary Alk1 2f/2f deletion mice was higher than Alk1 2f/2f -Sox17 2f/2f double transgenic mice (P2f/2f mice was partially rescued by Sox17 co-deletion in morphologically. In addition, target molecules of Notch pathway, Dll4, Hey1, Hey2, Jag1 was increased in Alk1-Sox17 co-deletion mice rather than solitary Alk1 deletion mice. Conclusions: Collectively, our findings demonstrate that the modulation of Sox17 could restrict the Alk1-induced AVM by upregulation of Notch pathway. This work establishes the Notch-Sox17 axis as a novel regulatory mechanism underlying Notch-mediated vascular stabilization in brain AVM.
- Published
- 2019
49. Gamma-ray spectroscopy of single Λ-hypernuclei at J-PARC: Results and perspective
- Author
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S. H. Hwang, Y. Nakada, Kanae Aoki, Shunsuke Kanatsuki, Hiroyuki Ekawa, Manami Fujita, Tadayuki Takahashi, Hitoshi Sugimura, Shoichi Hasegawa, Seongbae Yang, K. Tanida, Hiroyuki Sako, Tomofumi Nagae, T. Hayakawa, S. H. Kim, Takeshi O. Yamamoto, Atsushi Sakaguchi, Michelangelo Agnello, Yudai Ichikawa, Y. Sasaki, J. K. Ahn, Hirokazu Tamura, T. F. Wang, Jihwa Lee, S. Kinbara, Nobuyuki Chiga, T. Shiozaki, S. Y. Suzuki, Z. Tsamalaidze, Takeshi Koike, Satoshi Sato, Shuhei Hayakawa, N. Amano, Ryotaro Honda, Mifuyu Ukai, N. Ichige, Manami Nakagawa, M. H. Kim, Kensuke Kobayashi, T. J. Moon, M. Ikeda, Petr Evtoukhovitch, Elena Botta, Y. Togawa, Koji Miwa, Kenji Hosomi, Kotaro Shirotori, Yuya Akazawa, Kenichi Imai, A. Feliciello, S. Ishimoto, Shozo Suto, K. Tanabe, Toshiyuki Gogami, S. Marcello, Sho Nagao, and Y. Ogura
- Subjects
Physics ,Nuclear physics ,Formalism (philosophy of mathematics) ,Gamma ray ,Gamma spectroscopy ,J-PARC ,Symmetry breaking ,Ground state ,Spectroscopy ,Hypernucleus - Abstract
Experimental results from the J-PARC E13 experiments are summarized. A new experimental set up of E13 has established a platform for the future γ-ray hypernuclear spectroscopy at J-PARC using kaon beams. New γ rays are identified in HeΛ4 and FΛ19. The energy of 1.406 MeV for the HeΛ4(1+→0+) transition confirmed a sizable effect of Charge Symmetry Breaking (CSB) in ΛN interaction in the A=4 hypernuclear system. The identification of four γ rays in FΛ19 is made for the first time in sd shell hypernuclei. Especially, energy spacing of the ground state doublet is found to be 315.5 keV. A good agreement with two theoretical calculations suggests that the theoretical formalism used in p shell hypernuclei is also applicable to heavier hypernuclei. Lastly, an overview of the future J-PARC E63 experiment is given.
- Published
- 2019
50. Status of J-PARC E07: Systematic study of double strangeness nuclei with hybrid emulsion method
- Author
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Myint Kyaw Soe, Hidetaka Kobayashi, Shunsuke Kanatsuki, Kazuyua Ito, Ryotaro Honda, Masaharu Ieiri, Koji Miwa, M. H. Kim, Shin Hyung Kim, Takeshi Koike, Michiko Sekimoto, Tomonari Hayakawa, Kenji Hosomi, Myeong Jae Lee, E. Umezaki, Yu Takahashi, Khin Than Tint, Mifuyu Ukai, Kazuya Kobayashi, Shuhei Hayakawa, Hiroyuki Ekawa, Yuji Ishikawa, Aye Moh Moh Theint, Zhi Zhang, R. Goto, R. Kiuchi, Hitoshi Sugimura, Koutarou Shiratori, Y. Nakada, Shoichi Hasegawa, Wonji Choi, Tomoya Takeda, Y. Sasaki, May Sweet, Manabu Moritsu, Donhai Zhang, Tianli Ma, Kiyoshi Tanida, T. Hashimoto, Josef Pochodzalla, Shota Matsumoto, Yoshinori Sato, Keizo Agari, Kenichi Imai, K. N. Suzuki, Masahiro Yoshimoto, Yuya Akazawa, Yuki Fujikawa, Tae Jin Moon, M. Ichikawa, Erina Hirose, Masaki Ohashi, H. Kanauchi, Jae-Yong Lee, Hiroki Ito, Toshiyuki Takahashi, Y. C. Han, Jung Keun Ahn, Young Jun Kim, A. N. L. Nyaw, T. Nanamura, Woo Seung Chung, K. Inaba, Kazuma Nakazawa, S. Ashikaga, Michifumi Minakawa, Sung Hyun Kim, Shinji Kinbara, Min Min Soe, S. H. Hwang, Y. Ogura, Manami Nakagawa, S. Ozawa, N. Fujioka, E. Hayata, Hirokazu Tamura, Yoko Endo, Hiroyuki Sako, B. Bassalleck, T. Akaishi, A. Kasagi, Toshihide Kawai, Takeshi Yamamoto, Kenichiro Oue, Seong Bae Yang, Jong Yoon Sohn, Yuichi Nagase, S. Y. Ryu, Yudai Ichikawa, Falk Schupp, K. Hicks, S. Hoshino, Sebastian Bleser, Y. Toyama, Jong Won Lee, Aung Thu Moe, Junya Yoshida, K. Hoshino, Ken Watanabe, Abzal Iskendir, M. Hirose, Megumi Naruki, Hitoshi Takahashi, Manami Fujita, D. Nakashima, Toyoki Watabe, Ami S. Koshikawa, C. S. Yoon, and Susumu Sato
- Subjects
Physics ,Nuclear physics ,Beamline ,Hadron ,Emulsion ,Nuclear emulsion ,J-PARC ,Strangeness ,Hypernucleus ,Beam (structure) - Abstract
J-PARC E07 is the most complex emulsion experiment to date investigating double hypernuclei with a hybrid emulsion method. This experiment aims to detect 104 Ξ− stop events, ten times more events than the past experiments. Thus, an unequivocal identification of several new double hypernuclei is expected. The beam exposure has been completed at the K1.8 beam line of the J-PARC hadron facility in June 2017. The photographic development of all emulsion sheets has also been completed in February 2018. The emulsion sheets are presently being analyzed with dedicated optical microscopes. Current statistics is comparable to that of E373 and so far 10 events of 3-vertices topology have been detected. A typical event of double Λ hypernucleus and a twin Λ hypernucleus are introduced. We plan to complete the main part of the emulsion scanning within a year.
- Published
- 2019
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