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Stress and sleep quality in doctors working on-call shifts are associated with functional gastrointestinal disorders

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World Journal of Gastroenterology 2017年第18期23卷 3330-3337页

作者： Soo-Kyung Lim Seung Jin Yoo Dae Lim Koo Chae A park Han Jun Ryu Yong Jin Jung Ji Bong Jeong Byeong Gwan Kim Kook Lae Lee seong-joon Koh Department of Internal Medicine Seoul National University College of MedicineSeoul National University Boramae Hospital Department of Neurology Seoul National University Boramae HospitalSeoul National University College of Medicine

To investigate the role of sleep quality and psychosocial problems as predictors of functional gastrointestinal disorders (FGIDs) in doctors that work 24 hour-on-call *** this cross-sectional observation study, using the Rome III Questionnaire and Pittsburgh Sleep Quality Index (PSQI), we analyzed 170 doctors with 24 hour-on-call *** the participants that had experienced a 24 hour-on-call shift within the last 6 mo, 48 (28.2%) had FGIDs. Overall prevalence of irritable bowel syndrome (IBS) and functional dyspepsia (FD) were 16.5% and 17.1%, respectively, with 5.3% exhibiting both. Sleep scores (PSQI) (8.79 ± 2.71 vs 7.30 ± 3.43, P = 0.008), the presence of serious psychosocial alarm (83.3% vs 56.6%, P = 0.004), and the proportion of doctors who experienced over two months of recent on-call work (81.2% vs 68.9%, P = 0.044) were significantly different between individuals with or without FGIDs. Multivariate analysis revealed that presenting serious psychosocial alarm was an independent risk factor for prevalence of FD (OR = 5.47, 95%CI: 1.06-28.15, P = 0.042) and poor sleep quality (PSQI ≥ 6) was a predictor of IBS (OR = 4.17, 95%CI: 1.92-19.02, P = 0.016).CONCLUSIONPhysicians should recognize the role of sleep impairment and psychological stress in the development of FGIDs and a comprehensive approach should be considered to manage patients with FGIDs.

关键词： Psychosocial stress Sleep 24 hour-on-call shift Doctors Functional gastrointestinal disorders

A new species of Zanclognatha Lederer and three new records of the families Erebidae and Noctuidae(Lepidoptera,Noctuoidea)from Korea,with notes on larval feeding habits

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Journal of Forestry Research 2021年第3期32卷 1235-1240页

作者： Kang-Won Lee joon-Mo Koo Jae-Dong Kim Hui-Lin Han Kyu-Tek park Holoce Ecosystem Conservation Research Institution HoengseongGangweon Province 225-841Republic of Korea Department of Plant Medicine Chungbuk National UniversityCheongju28644Republic of Korea Department of Applied Biology College of Agriculture and Life ScienceChungnam National UniversityDaejeon 34134Republic of Korea School of Forestry Northeast Forestry UniversityHarbin 150040China Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education Northeast Forestry UniversityHarbin 150040People’s Republic of China Bioresource and Environmental Center Incheon National UniversityIncheon 22012Republic of Korea

A new species of Zanclognatha Lederer,1857 of the family Erebidae,*** sp.n.,one species of Family Erebidea,Asota egens(Walker,1854)and two species of Family Noctuidae:Meganephria retinea Gyulai and Ronkay,1999 and Amphipyra subrigua Bremer and Grey,1853,are reported for the first time from *** addition,larval feeding habits with their host plants for three species are newly recognized from *** of adults,larvae for Zanclognatha querciella and Meganephria retinea,and the genitalia of male or female for all species are provided.

关键词： Host plants New species New records Korean peninsula Taxonomy

Application of response surface method for optimal transfer conditions of multi-layer ceramic capacitor alignment system

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Journal of Central South University 2011年第3期18卷 726-730页

作者： park Su-seong KIM Jae-min CHUNG Won-jee SHIN O-chul School of Mechatronics Changwon National University

The multi-layer ceramic capacitor (MLCC) alignment system aims at the inter-process automation between the first and the second plastic *** a result of testing performance verification of MLCC alignment system,the average alignment rates are 95% for 3216 chip,88.5% for 2012 chip and 90.8% for 3818 *** MLCC alignment system can be accepted for practical use because the average manual alignment is just 80%.In other words,the developed MLCC alignment system has been upgraded to a great extent,compared with manual *** on the successfully developed MLCC alignment system,the optimal transfer conditions have been explored by using *** simulations using ADAMS has been performed according to the cube model of *** using MiniTAB,the model of response surface has been established based on the simulation *** optimal conditions resulted from the response optimization tool of MiniTAB has been verified by being assigned to the prototype of MLCC alignment system.

关键词： multi-layer ceramic capacitor (MLCC) alignment system response surface method (RSM) MiniTAB ADAMS

A new strengthening mechanism driven by disruptive shear and solute segregation during warm rolling in 1.4 GPa class 12.5 wt% Al added-FeMnC ultra-lightweight steel

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Journal of Materials Science & Technology 2023年第26期157卷 174-188页

作者： Chiwon Kim Hyun-Uk Hong joonoh Moon Bong Ho Lee seong-Jun park Chang-Hoon Lee Department of Materials Convergence and System Engineering Changwon National University 20 Changwondaehak-roChangwonGyeongnam 51140Republic of Korea Advanced Analysis Team Daegu Gyeongbuk Institute of Science and Technology 333 Technojungang-daeroDaegu42988Republic of Korea Ferrous Alloy Department Korea Institute of Materials Science 797 ChangwondaeroChangwonGyeongnam 51508Republic of Korea

Novel strengthening of Fe-29.1Mn-12.5Al-1.35C-4.95Cr steel achieved by warm rolling was *** solution-treated steel consisted of aγ-matrix containing nano-sizedκ-carbide((Fe,Mn)_(3) AlC)and elongated prior ferrite,which was transformed into FeAl-type B2 and Fe_(3) Al-type D0_(3) *** solution-treated steel exhibited poor strain hardening owing to glide softening associated withκ-carbide shearing by ***,after warm rolling with a reduction ratio of 30%at 300℃,the yield and tensile strengths significantly increased from 917 to 1300 MPa and 1025 to 1419 MPa,*** tensile test conducted at 300℃to simulate warm rolling exhibited serrated flows,indicating dy-namic strain aging(DSA).Atom probe tomography exhibited that the C atoms inκ-carbide were swept away along the slip direction by disruptive shear during rolling at 300℃.The swept C atoms along the slip direction interacted strongly with dislocations at 300℃,with repeated pinning and breakaway of dislocations from the C *** contributed to significant strengthening owing to the formation of a solute-rich atmosphere after warm *** results of the tensile tests at 300℃indicated that the de-gree of strengthening was proportional to the pre-strain *** strength of 1.4 GPa can be achieved with good ductility(17%elongation)by warm *** novel warm-rolling strengthening method ex-pedites the potential application of Fe-29.1Mn-12.5Al-1.35C-4.95Cr as a 1.4 GPa class ultra-lightweight steel.

关键词： FeMnAlC Cr addition κ-carbide Dynamic strain aging Strengthening

Standard vs magnifying narrow-band imaging endoscopy for diagnosis of Helicobacter pylori infection and gastric precancerous conditions

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World Journal of Gastroenterology 2021年第18期27卷 2238-2250页

作者： Jun-Hyung Cho seong Ran Jeon So-Young Jin Suyeon park Digestive Disease Center Soonchunhyang University HospitalSeoul 04401South Korea Department of PathologySoonchunhyang University HospitalSeoul 04401South Korea Department of Pathology Soonchunhyang University HospitalSeoul 04401South Korea Department of Medical Biostatistics Soonchunhyang University HospitalSeoul 04401South Korea

BACKGROUND Advances in endoscopic imaging enable the identification of patients at high risk of gastric ***,there are no comparative data on the utility of standard and magnifying narrow-band imaging(M-NBI)endoscopy for diagnosing Helicobacter pylori(***)infection,gastric atrophy,and intestinal *** To compare the diagnostic performance of standard and M-NBI endoscopy for *** gastritis and precancerous *** In 254 patients,standard endoscopy findings were classified into mosaic-like appearance(type A),diffuse homogenous redness(type B),and irregular redness with groove(type C).Gastric mucosal patterns visualized by M-NBI were classified as regular round pits with polygonal sulci(type Z-1),more dilated and linear pits without sulci(type Z-2),and loss of gastric pits with coiled vessels(type Z-3).RESULTS The diagnostic accuracy of standard and M-NBI endoscopy for *** gastritis was 93.3%and 96.1%,*** gastric precancerous conditions,the accuracy of standard and M-NBI endoscopy was 72.0%vs 72.6%for moderate to severe atrophy,and 61.7%vs.61.1%for intestinal metaplasia in the corpus,*** to type A and Z-1,types B+C and Z-2+Z-3 were significantly associated with moderate to severe atrophy[odds ratio(OR)=5.56 and 8.67]and serum pepsinogen I/II ratio of≤3(OR=4.48 and 5.69).CONCLUSION Close observation of the gastric mucosa by standard and M-NBI endoscopy is useful for the diagnosis of *** gastritis and precancerous conditions.

关键词： Endoscopy Magnifying narrow-band imaging Helicobacter pylori Gastric atrophy Intestinal metaplasia Pepsinogen

Extrapleural solitary fibrous tumor of the thyroid gland: A case report and review of literature

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World Journal of Clinical Cases 2020年第4期8卷 782-789页

作者： Yong joon Suh Jung Ho park Jae Hyeon Jeon Sanchir-Erdene Bilegsaikhan Department of Breast and Endocrine Surgery Hallym University Sacred Heart HospitalGyeonggi-do 14068South Korea Department of Biomedical Science Hallym UniversityChuncheon 24252South Korea

BACKGROUND Solitary fibrous tumor(SFT)is an uncommon mesenchymal neoplasm that arises from the pleura.A few SFTs have also been described in extrapleural ***,SFT of the thyroid gland is ***,we report a case of extrapleural SFT on the thyroid gland,in addition to a literature *** SUMMARY A 59-year-old man visited our hospital in July 2017 complaining of a large mass in his *** thyroid function test results,including antibody levels,were within the normal *** showed a 4.7 cm×4.0 cm×3.2 cm solitary mass of intermediate suspicion in the left thyroid lobe.A fine-needle aspiration biopsy was subsequently *** pathologist reported a benign follicular ***,the size of this nodule increased to 5.5 cm×5.0 cm×3.4 cm by April *** a multidisciplinary discussion,a left lobectomy was performed in May *** specimen showed a well-demarcated,partly encapsulated,soft nodule of whitish and tan/brown color on the cut *** microscopy revealed high cellularity with moderate cytologic *** mitotic count was 5/10 high-power *** was no tumor necrosis or lymphovascular *** tumor was CD34-positive and signal transducer and activator of transcription *** thyroid transcription factor-1 nor cytokeratin expression was *** Ki-67 showed intermediate proliferative *** final diagnosis was extrapleural SFT of the thyroid gland with a clear resection *** patient was discharged without complication three days after the *** In the literature,extrapleural SFT of the thyroid gland has been reported to behave indolently with the capacity for recurrence and rare metastasis,although surgical resection is the treatment of *** this disease entity is important for accurate diagnosis and proper management.

关键词： Solitary fibrous tumor Mesenchymal neoplasm Thyroid gland Surgery Case report Review

Dipole-assisted carrier transport in bis(trifluoromethane) sulfonamide-treated O-ReS_(2) field-effect transistor

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Nano Research 2021年第7期14卷 2207-2214页

作者： Jae Young park SangHyuk Yoo Byeongho park Taekyeong Kim Young Tea Chun Jong Min Kim Keonwook Kang Soo Hyun Lee seong Chan Jun Department of Mechanical Engineering Yonsei UniversitySeoul 03722Republic of Korea Center for Biomicrosystem Brain Science InstituteKorea Institute of Science and TechnologySeoul 02792Republic of Korea Sensor System Research Center Korea Institute of Science and TechnologySeoul 02792Republic of Korea Department of Physics Hankuk University of Foreign StudiesYongin 17035Republic of Korea Division of Electronics and Electrical Information Engineering Korea Maritime and Ocean UniversityBusan 49112Republic of Korea Electrical Engineering Division Engineering Department University of CambridgeCambridgeCB3 OFAUK

We demonstrate the dipole-assisted carrier transport properties of bis(trifluoromethane)sulfonamide(TFSI)-treated O-ReS_(2) field-effect *** ReS_(2) was compared with defect-mediated ReS_(2) to confirm whether the presence of defects on the interface enhances the interaction between O-ReS_(2) and TFSI *** to the experiment,density functional theory(DFT)calculation was performed,and the result indicated that the charge transfer between TFSI and O-ReS_(2) is more sensitive to external electric fields than that between TFSI and pristine ReS_(2).After TFSI treatment,the drain current of O-ReS_(2) FET was significantly increased up to 1,113.4 times except in the range of−0.32–0.76 V owing to Schottky barrier modulation from dipole polarization of TFSI molecules,contrary to a significant degradation in device performance in pristine ReS_(2) ***,in the treated O-ReS_(2) device,the dipole direction was highly influenced by the voltage sweep direction,generating a significant area of hysteresis in I–V and transfer characteristics,which was further verified by the surface potential ***,the dipole state was enhanced according to the wavelength of the light source and *** results indicate that TFSI-treated ReS_(2) FET has large potential for use as next-generation memristor,memory,and photodetector.

关键词： Two-dimensional material ReS_(2) field-effect transistor TFSI superacid dipole

Two- and Three-Dimensional Simulations of Beetle Hind Wing Flapping during Free Forward Flight

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Journal of Bionic Engineering 2013年第3期10卷 316-328页

作者： Tuyen Quang Le Tien Van Truong Hieu Trung Tran Soo Hyung park Jin Hwan Ko Hoon Cheol park Kwang joon Yoon Doyoung Byun Korea Institute of Ocean Science and Technology PO Box 29 Ansan 425-600 Republic of Korea Department of Aerospace and Information Engineering Konkuk University Seoul Republic of Korea Department of Advanced Technology Fusion Konkuk University Seoul Republic of Korea Department of Mechanical Engineering Sungkyunkwan University Suwon440-746 Republic of Korea

Aerodynamic characteristic of the beetle, Trypoxylus dichotornus, which has a pair of elytra （forewings） and hind wings, is numerically investigated. Based on the experimental results of wing kinematics, two-dimensional （2D） and three-dimensional （3D） computational fluid dynamic simulations were carried out to reveal aerodynamic performance of the hind wing. The roles of the spiral Leading Edge Vortex （LEV） and the spanwise flow were clarified by comparing 2D and 3D simulations. Mainly due to pitching down of chord line during downstroke in highly inclined stroke plane, relatively high averaged thrust was produced in the free forward flight of the beetle. The effects of the local corrugation and the camber variation were also investigated for the beetle＇s hind wings. Our results show that the camber variation plays a significant role in improving both lift and thrust in the flapping. On the other hand, the local corrugation pattern has no significant effect on the aerodynamic force due to large angle of attack during flapping.

关键词： beetle flight forward flight three-dimensional simulation corrugation effect time-camber variation

Clinical analysis of risk factors contributing to recurrence of pterygium after excision and graft surgery

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International Journal of Ophthalmology(English edition) 2015年第3期8卷 522-527页

作者： Sang Won Ha joon Ho park Im Hee Shin Hong Kyun Kim Department of Ophthalmology Kyungpook National University School of Medicine Department of Medical Statistics Catholic University of Daegu School of medicine

AIM: To find the risk factors related to the reproliferation of the pterygial tissue after excision and graft ***: Charts of 130 eyes of 130 patients who had pterygial excision from March 2006 to April 2011 were reviewed. Preoperative pterygium morphology, surgical methods, and adjunctive treatments were statistically analyzed for their relationship with ***: During the follow-up period, recurrence was observed in 20 eyes(15.4%). None of the preoperative morphologic features were affected the rate of the recurrence. However, an age <40y [P =0.085, odds ratio(OR) 3.609, 95% confidence interval(CI) 0.838-15.540]and amniotic membrane graft instead of conjunctival autograft(P =0.002, OR 9.093, 95% CI 2.316-35.698) were statistically significant risk factors for *** analysis revealed that intraoperative mitomycin C(MMC)(P =0.072, OR 0.298, 95% CI 0.080-1.115)decreased the rate of recurrence. CONCLUSION: Younger age is a risk factor for reproliferation of pterygial tissue after excision and amniotic membrane transplantation(AMT) are less effective in preventing recurrence of pterygium after excision based on the comparison between conjunctival autograft and AMT. Intraoperative MMC application and conjunctival autograft reduce recurrence.

关键词： pterygium recurrence conjunctival autograft amniotic membrane graft mitomycin C