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CT Thresholds for Spinal Bone Mineral Attenuation to Prioritize Eligible Older Women for Osteoporosis Screening

Open Journal of Radiology 2024年第2期14卷 92-101页

作者： seo yeon k. orite Bryn Higuchi Hyo-Chun Yoon Lana H. Gimber St. Elizabeths Medical Center Brighton MA USA University of California Irvine CA USA k.iser Permanente Division of Research Oakland CA USA Department of Diagnostic Imaging Hawaii Permanente Medical Group Honolulu HI USA

Introduction: Computed tomography (CT) measurements of bone mineral attenuation may be a useful means to identify older women who should be prioritized for bone mineral density screening. Methods: We compared bone mineral attenuation as measured in the L1 vertebra of CT studies to the results of dual-energy x-ray absorptiometry (DEXA) studies to determine what CT attenuation thresholds might yield a reasonable combination of sensitivity and specificity for the detection of osteoporosis. The study was limited to women between the ages of 65 and 75 years who had a DEXA study and a CT that included the L1 or adjacent vertebra performed within 3 years of the DEXA study. Results: There were 1226 women in this study, of whom 452 (38%) had osteoporosis based on a T-score ≤ −2.5 by DEXA. There were 830 CT studies performed with contrast and 396 studies which were performed without contrast. There was a statistically significant difference in the mean HU of those studies performed without contrast compared to those with contrast (unenhanced mean 103 HU versus 125 HU, p < 0.001). Different CT attenuation thresholds provided the most appropriate combination of sensitivity and specificity for the detection of osteoporosis when comparing CT studies performed without or with IV contrast and when all the CT data were used in aggregate. Conclusion: Different thresholds appear necessary when using the mean CT vertebral attenuation to identify older women for preferential referral for DEXA studies.

关键词： Osteoporosis Bone Mineral Attenuation CT Threshold

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Significant control of metal-insulator transition temperature through catalytic excessive oxygen doping in high-performance vanadium dioxide nanobeam channel

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Journal of Materials Science & Technology 2020年第9期44卷 96-101页

作者： Minhwan k. Sang yeon Lee Jucheol Park.Hyungtak.seo Department of Energy Systems Research Ajou UniversitySuwon16499Republic of Korea Gyeongbuk.Science Technology Promotion Center Gumi Electronics&Information Technology Research InstituteGumi39717Republic of Korea Department of Materials Science and Engineering Ajou UniversitySuwon16499Republic of Korea

The strategy of a reliable transition temperature control of vanadium dioxide(VO2)is *** VO2 nanobeams were synthesized by a thermal chemical vapor deposition(TCVD)*** metal-insulator transition(MIT)temperature increases to above 380k.when the TiO2 ratio of the source is 5 at.%,although the Ti source is not physically doped into VO2 *** XPS spectra of the V 2p orbital reveal the excessive oxidation of V after the TCVD processes with a higher TiO2 ratio,indicating that the TiO2 precursor is important in the O-doping of the surface V O bonds when forming volatile Ti-O gas ***,TiO2 reactants can be used as a VO2 surface chemical modifier to manipulate the MIT transition temperature and maintain a homogenous VO2 phase,which is useful for a Mott device application with a record on/off switching ratio>104 and Mott transition temperature>380 k.

关键词： VO2 Mott transition Metal-insulator transition temperature Oxygen doping Titanium catalyst

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Aluminum doping for optimization of ultrathin and high-k.dielectric layer based on SrTiO3

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Journal of Materials Science & Technology 2020年第7期42卷 28-37页

作者： Ji-Ye Baek.Le Thai Duy Sang yeon Lee Hyungtak.seo Department of Energy Systems Research Ajou UniversitySuwon 443-749South Kore Department of Materials Science and Engineering Ajou UniversitySuwon 443-749South Korea

An ultrathin SrTiO3 dielectric layer is optimized through Al doping to solve the problems existing in development of ultra-high-k.oxide MOS *** post-deposition annealing,Al doping induces changes in the electronic structure of SrTiO3,thereby effectively reducing leak.ge current to 80) of ultrathin SrTMO3 MOS *** titanate(SrTiO3) is a high-k.material but its bandgap is smaller than that of other oxide dielectrics(e.g.,SiO2,Al2 O3).Consequently,an ultrathin SrTiO3 film may have a high tunneling leak.ge current,which is not suitable for capacitor-based *** improve the performance of metal-oxide-semiconductor(MOS) capacitors using SrTiO3,an approach based on homogenous and uniform aluminum doping to SrTiO3 through co-sputtering is *** bandgap of a pristine SrTiO3 film showed an increase of 0.5 eV after Al ***,Al doping decreased the leak.ge current of SrTiO3/Si-based MOS capacitors by more than five orders of magnitude(at the level of nanoampere per square centimeter).Importantly,a dielectric constant of 81.3 and equivalent oxide thick.ess less than 5 A were achieved in an 8-nm-thick.Al-doped SrTiO3 film owing to changes in its crystal structure and conduction band edge electronic ***,the obtained data show the effectiveness of the proposed approach for solving the problems existing in the development of ultra-high-k.oxide MOS capacitors.

关键词： Aluminum doping SrTiO3 ultrathin High dielectric constant MOS capacitors

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Septic shock.due to Granulicatella adiacens after endoscopic ultrasound-guided biopsy of a splenic mass:A case report

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World Journal of Gastroenterology 2021年第8期27卷 751-759页

作者： seo-yeon Cho Eunae Cho Chang-Hwan Park.Hee-Joon k.m Joo-yeon k.o Division of Gastroenterology Department of Internal MedicineChonnam National University HospitalGwangju 61469South Korea Department of Surgery Chonnam National University HospitalGwangju 61469South Korea Department of Pathology Chonnam National University HospitalGwangju 61469South Korea

BACk.ROUND Endoscopic ultrasound-guided fine needle aspiration or biopsy(EUS-FNA or FNB)has become a popular method for diagnosing various lesions of the gastrointestinal tract and surrounding tissue due to the accuracy and *** the best of our k.owledge,no case report of severe infection after EUS-FNB of a solid lesion in the spleen has been ***,we report a rare case of septic shock.after EUS-FNB of a splenic *** SUMMARY A 45-year-old male patient presented to the outpatient clinic due to an incidentally detected splenic mass.A definitive diagnosis could not be established based on the abdominal magnetic resonance *** of the spleen showed a 6 cm-sized,relatively well-demarcated,heterogeneous mass,and EUS-FNB with a 22G needle was *** days after the procedure patient developed septic shock.and a splenic abscess was *** culture revealed growth of Granulicatella *** the treatment with antibiotics the patient underwent surgical resection,and the pathological examination showed diffuse large B-cell *** patient received chemotherapy and he is in complete *** Infection of a splenic mass after EUS-FNB is a rare complication and prophylactic antibiotics might be considered.

关键词： Endoscopic ultrasound Endoscopic ultrasound-guided fine needle biopsy Splenic neoplasms Lymphoma Septic shock Case report

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Structural Resistance of SRC Column-Steel Beam Joint Developed for Innovative Construction of Buildings

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Journal of Iron and Steel Research International 2011年第S1期18卷 924-928页

作者： seo Soo-yeon Yun Hyun-Do k.m Seung-hun Dept.of Architectural Engineering Chungju National UniversityChungjuKorea Dept.of Architectural Engineering Chungnam National UniversityDaejeonKorea Dept.of Architectural Engineering Hanbat National UniversityDaejeonKorea

This paper presents an experimental study investigating factors influencing the effective width of steel reinforced concrete (SRC) column-steel beam joints of building in order to calculate its resisting *** 1/2 scaled interior SRC column-steel beam joint specimens were made with considering parameters such as beam flange width,beam depth and SRC column *** directional increasing moment was applied to the joint by acting forces to each ends of beam and the structural behavior of joint was *** previous design method suggested by Deierlein was reviewed and a modified equation was proposed from the analysis of test *** result indicated that the equation to calculate the effective width in Deierlein’s design method didn’t consider effectively the influence caused by the variation of beam depth so that a modified equation was suggested and the validation of it was confirmed in this paper.

关键词： SRC column-steel beam joint effective width flange width beam depth

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Performance evaluations on inner vs. outer decomposition first parallel join algorithms for two nested loop joins

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Journal of Central South University 2014年第10期21卷 3873-3882页

作者： seo-Young NOH Heejun YOON Il-yeon YEO Yoon-su JEONG Hyungwoo PARk National Institute of Supercomputing and Network.ng Korea Institute of Science and Technology Information Department of Information Communication Engineering Mokwon University

Two popular traditional join algorithms and their parallel versions are introduced. When designing join algorithms in serial computing environment, decomposing inner relation is considered as the right direction to save disk.I/Os. However, two different decomposition algorithms are compared, such as inner vs. outer decomposition first algorithms for tuple-based and block.based nested loop joins, showing that the proposed approach is 20% better than general approach. Also lemmas are proved, when we have to use the outer decomposition first parallel join algorithms.

关键词： parallel join performance inner decomposition outer decomposition

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Evaluation of Some Stem Taper Models for Camellia japonica in Mount Halla, k.rea

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Journal of Mountain Science 2015年第6期12卷 1395-1402页

作者： Sung Cheol JUNG yeon Ok.seo Hyun k.u WON Roscinto Ian C.LUMBRES Warm Temperate and Subtropical Forest Research Center Korea Forest Research Institute College of Forestry Benguet State University

This study was conducted to evaluate the performance of the four stem taper models on Camellia japonica in Jeju Island, k.rea using fit statistics and lack.of-fit statistics. The five statistical criteria that were used in this study were standard error of estimate(SEE), mean bias( E), absolute mean difference(AMD), coefficient of determination(R2), and root mean square error(RMSE). Results showed that the k.zak.model 02 stem taper had the best performance in all fit statistics(SEE: 3.4708, E : 0.0040 cm, AMD : 0.9060 cm, R2 : 0.9870, and RMSE : 1.2545). On the other hand, Max and Burk.art stem taper model had the poorest performance in each statistical criterion(SEE: 4.2121, E : 0.2520 cm, AMD : 1.1300 cm, R2 : 0.9805, and RMSE: 1.5317). For the lack.of-fit statistics, the k.zak.model 02 also provided the best performance having the best AMD in most of the relative height classes for diameter outside bark.prediction and in most of the DBH classes for total volume prediction while Max and Burk.art had the poorest performance. These stem taper equations could help forest managers to better estimate the diameter outside bark.at any given height, merchantable stem volumes and total stem volumes of the standing trees of Camellia japonica in the forests of Jeju Island, k.rea.

关键词： Mount Halla Stem volume Diameter outside bark.k.zak.model Model evaluation

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Effect of High-Performance Steel on the Tension Stiffening and Crack.ng Behavior of Reinforced Concrete (RC) Tension Ties

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Journal of Iron and Steel Research International 2011年第S1期18卷 812-816页

作者： Yun Hyun-do Lee Young-oh Ryu Seung-hyun seo Soo-yeon Department of Architectural Engineering Chungnam National University Daejeon 305764 South Korea Department of Architectural Engineering Chungju National University Chungju South Korea

In construction industry, the application of high-performance reinforcement bar is required strongly. Unfortunately, not nearly enough research has been conducted on high-performance steel in comparison with high strength concrete. This paper describes the effect of high-performance steel as reinforcement steel bar on the tension response and crack.ng behavior of concrete and fiber-reinforced strain-hardening cement-based composite (SHCC) tension members. High-performance steel is characterized by higher strength in comparison to ASTM A615-06 Grade 60 steel. The tension stiffening effect on high-performance reinforcing bars embedded in cement-based composite prism is investigated experimentally. The variables in the study are types of cement-based composite (conventional concrete, synthetic fiber-reinforced cement composite), yielding strength of steel bars (400MPa and 600MPa), and types of loading (monotonic and repeated tension loading).

关键词： crack.width tension stiffening fiber-reinforced strain-hardening cement-based composite tension

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The Development of Metabolic Derangement in Male Offspring after Perinatal Exposure to Di-(2-Ethylhexyl) Phthalate

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Biomedical and Environmental Sciences 2018年第7期31卷 531-534页

作者： Yun-jung Yang Moon-seo Park.Eui-Jin Lee yeon-pyo Hong Department of Preventive Medicine College of Medicine Chung-Ang University Institute of Biomedical Science Catholic Kwandong University International St. Mary’s Hospital Institute for Catholic Integrative Medicine Incheon St. Mary’s Hospital College of Medicine The Catholic University of Korea

The prevalence of obesity and type 2 diabetes mellitus（T2DM）has been increasing throughout the world over the past 20 *** chemicals k.own to regulate the endocrine system have been considered as a risk.factor for th... 详细信息

关键词： PND Phthalate The Development of Metabolic Derangement in Male Offspring after Perinatal Exposure to Di Ethylhexyl

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Solar Driven 15.7% Hydrogen Conversion by Harmony of Light Harvesting,Electron Transporting Bridge,and S-Defection in a Self-Assembled Microscale CuS/rGO/CP Photoanode

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Energy & Environmental Materials 2024年第3期7卷 190-201页

作者： Sujeong k.m Boseok.seo Hyerim Park.Younghwan Im Jeong yeon Do Byung Sub k.ak.Namgyu Son Mink.u k.m Misook.k.ng Department of Chemistry College of Natural SciencesYeungnam UniversityGyeongsan Gyeongbuk 38541Korea School of Chemical Engineering Yeungnam UniversityGyeongsan Gyeongbuk 38541Korea Department of Energy and Hydrocarbon Chemistry Graduate School of EngineeringKyoto UniversityKyoto 615-8510Japan k.rea Evaluation Institute of Industrial Technology(k.it) Cheomdan-Ro 8-GilDong-GuDaegu 41069Korea k.rea Electric Power Research Institute(k.PRI)105 Munji-ro Yooseong-guDaejeon 34056Korea

CuS is an encouraging photoelectrode candidate that meets the essential requirements for efficient solar-to-hydrogen production,but it has not been thoroughly studied.A CuS light absorber layer is grown by the self-assembly of copper and sulfur precursors on a carbon paper(CP)***,rGO is introduced as a buffer layer to control the optical and electrical properties of the *** well-ordered microstructural arrangement suppresses the recombination loss of electrons and holes owing to enhanced charge-carrier generation,separation,and *** potential reaching 10 mA cm^(-2)in 1.0 M k.H solution is significantly lowered to 0.87 V,and the photocurrent density at 1.23 V is 94.7 mA cm^(-2).The computational result reveals that the potential-determining step is sensitive to O^(*)stability;the lower stability of O^(*)in the thin layer of CuS/rGO decreases the free-energy gap between the initial and final states of the potential-determining step,resulting in a lowering of the onset *** faradaic efficiency for the photoelectrochemical oxygen evolution reaction in the optimized 2CuS/1rGO/CP photoanode is 98.60%,and the applied bias photon-to-current and the solar-to-hydrogen efficiencies are 11.2%and 15.7%,respectively,and its ultra-high performance is maintained for 250 *** record-break.ng achievement indices may be a trigger for establishing a green hydrogen economy.

关键词： 15.7%-solar to hydrogen density functional theory lower photopotential p-CuS/rGO/CP photoanode photoelectrochemical oxygen evolution

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