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Effects of ranitidine for exercise induced gastric mucosal changes and bleeding

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World Journal of Gastroenterology 2006年第16期12卷 2579-2583页

作者： Suck Jun Choi yong Sung Kim Jeong Ryong Chae hong Kwan Cho Tae Hyeon Kim Young Woo Sohn yong Leol Oh Geom Seog Seo yong-ho nah Suck Chei Choi Department of Leisure and Sports Wonkwang Health Science CollegeIksanSouth Korea Department of Internal Medicine School of MedicineWonkwang University and Digestive Disease Research InstituteIksanSouth Korea Department of Physical Education College of Natural SciencesKunsan National UniversityKunsanSouth Korea Department of Internal Medicine School of MedicineWonkwang University and Digestive Disease Research InstituteIksanSouth Korea and Department of Physical EducationCollege of Natural SciencesKunsan National UniversityKunsanSouth Korea

AIM： To evaluate the effect of ranitidine on gastric mucosal changes and on GI bleeding in long distance runhers. METhoDS： Twenty-four long distance runners （M： 16, F： 8, age： 18.2＋ 1.5 years） participated in this study. A symptom questionnaire, stool hemoccult test, and upper gastrointestinal （GI） endoscopy were performed on the subjects prior to the study. The subjects took oral ranitidine （150 mg, b.i.d.） for two weeks. The upper GI endoscopy and stool Hemoccult tests were repeated after the treatment. RESULTS： Twenty-two of the 24 runners had at least one upper G1 mucosal lesion before the medication. The Endoscopic improvements were seen in eleven of the 14 cases of erosive gastritis and four of the 5 cases of esophagitis. Six subjects were Heine occult positive prior to the study, but only one was positive after the medication. CONCLUSION： Gastric mucosal lesions and GI bleeding in long distance runners seem to be associated to acidrelated factors mediated by the high level of regular running. Ranitidine seems to be and effective prophylaxis to prevent gastric mucosal lesions and GI bleeding.

关键词： Endoscopy Exercise, Gastrointestinal bleeding Ranitidine

Z^2 traversal order: An interleaving approach for VR stereo rendering on tile-based GPUs

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Computational Visual Media 2017年第4期3卷 349-357页

作者： Jae-ho nah Yeongkyu Lim Sunho Ki Chulho Shin LG Electronics SeoulRepublic of Korea

With increasing demands of virtual reality(VR) applications, efficient VR rendering techniques are becoming essential. Because VR stereo rendering has increased computational costs to separately render views for the left and right eyes, to reduce the rendering cost in VR applications, we present a novel traversal order for tile-based mobile GPU architectures: Z^2 traversal order. In tile-based mobile GPU architectures,a tile traversal order that maximizes spatial locality can increase GPU cache efficiency. For VR applications, our approach improves upon the traditional Z order *** render corresponding screen tiles in left and right views in turn, or simultaneously, and as a result, we can exploit spatial adjacency of the two tiles. To evaluate our approach, we conducted a trace-driven hardware simulation using Mesa and a hardware simulator. Our experimental results show that Z^2 traversal order can reduce external memory bandwidth requirements and increase rendering performance.

关键词： virtual reality(VR) tile traversal order tile-based GPU mobile GPU graphics hardware

Sub-picosecond,strain-tunable,polarizationselective optical switching via anisotropic exciton dynamics in quasi-1D ZrSe_(3)

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Light(Science & Applications) 2024年第11期13卷 2576-2588页

作者： Sang ho Suk Sanghee nah Muhammad Sajjad Sung Bok Seo Jianxiang Chen Sangwan Sim School of Electrical Engineering Hanyang UniversityAnsanSouth Korea Seoul Center Korea Basic Science InstituteSeoulSouth Korea Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute University of NottinghamNingboChina Key Laboratory of Carbonaceous Wastes Processing and Process Intensification Research of Zhejiang Province University of Nottingham Ningbo ChinaNingboChina

In cutting-edge optical technologies,polarization is a key for encoding and transmitting vast information,highlighting the importance of selectively switching and modulating polarized ***,anisotropic two-dimensional materials have emerged for ultrafast switching of polarization-multiplexed optical signals,but face challenges with low polarization ratios and limited spectral ***,we apply strain to quasi-one-dimensional layered ZrSe_(3)to enhance polarization selectivity and tune operational energies in ultrafast all-optical ***,transient absorption on unstrained ZrSe_(3)reveals a sub-picosecond switching response in polarization along a specific crystal axis,attributed to shifting-recovery dynamics of an anisotropic ***,its polarization selectivity is weakened by a slow non-excitonic response in the perpendicular *** overcome this limitation,we apply strain to ZrSe_(3)by bending its flexible *** compressive strain spectrally decouples the excitonic and nonexcitonic components,doubling the polarization selectivity of the sub-picosecond switching and tripling it compared to that in the tensile-strained ZrSe_(3).It also effectively tunes the switching energy at a shift rate of~93 meV%-*** strain-tunable switching is repeatable,reversible,and robustly maintains the sub-picosecond ***-principles calculations reveal that the strain control is enabled by momentum-and band-dependent modulations of the electronic band structure,causing opposite shifts in the excitonic and non-excitonic *** findings offer a novel approach for high-performance,wavelength-tunable,polarization-selective ultrafast optical switching.

关键词： polarization tunable strain

Nanoscale visualization of hot carrier generation and transfer at non-noble metal and oxide interface

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Journal of Materials Science & Technology 2022年第3期98卷 151-159页

作者： Ranveer Singh Qadeer Akbar Sial Seung-ik Han Sanghee nah Ji-yong Park Hyungtak Seo Department of Materials Science and Engineering Ajou UniversitySuwon16499Republic of Korea Department of Energy Systems Research Ajou UniversitySuwon16499Republic of Korea Seoul Center Korea Basic Science InstituteSeoul02841Republic of Korea Department of Physics Ajou UniversitySuwon16499Republic of Korea

The conversion efficiency of energy-harvesting devices can be increased by utilizing hot-carriers(HCs).however,due to ultrafast carrier-carrier scattering and the lack of carrier injection dynamics,HC-based devices have low *** the present work,we report the effective utilization of HCs at the nanoscale and their transfer dynamics from a non-noble metal to a metal oxide interface by means of real-space photocurrent mapping by using local probe techniques and conducting femtosecond transient absorption(TA)*** photocurrent maps obtained under white light unambiguously show that the HCs are injected into the metal oxide layer from the TiN layer,as also confirmed by conductive atomic force *** addition,the increased photocurrent in the bilayer structure indicates the injection of HCs from both layers due to the broadband absorption efficiency of TiN layer,passivation of the surface states by the top TiN layer,and smaller barrier height of the ***,electrostatic force microscopy and Kelvin probe force microscopy provide direct evidence of charge injection from TiN to the MoO_(x)film at the *** TA absorption spectra show a strong photo-bleaching signal over wide spectral range and ultrafast decaying behavior at the picosecond time scale,which indicate efficient electron transfer from TiN to MoO_(x).Thus,our simple and effective approach can facilitate HC collection under white light,thereby achieving high conversion efficiency for optoelectronic devices.

关键词： Non-noble metal hot carrier Real-space photocurrent mapping Local-probe force microscopy

Onsite-effects of dual-hemisphere versus conventional single-hemisphere transcranial direct current stimulation A functional MRI study

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Neural Regeneration Research 2012年第24期7卷 1889-1894页

作者： yong Hyun Kwon Sung ho Jang Department of Physical Therapy Yeungnam College of Science & TechnologyDaegu 705-703Republic of Korea Department of Physical Medicine and Rehabilitation College of MedicineYeungnam UniversityDaegu 705-717Republic of Korea

We performed functional MRI examinations in six right-handed healthy *** functional MRI scanning,transcranial direct current stimulation was delivered with the anode over the right primary sensorimotor cortex and the cathode over the left primary sensorimotor cortex using dual-hemispheric transcranial direct current *** was compared to a cathode over the left supraorbital area using conventional single-hemispheric transcranial direct current stimulation. Voxel counts and blood oxygenation level-dependent signal intensities in the right primary sensorimotor cortex regions were estimated and compared between the two transcranial direct current stimulation *** results showed that dual-hemispheric transcranial direct current stimulation induced greater cortical activities than single-hemispheric transcranial direct current *** findings suggest that dual-hemispheric transcranial direct current stimulation may provide more effective cortical stimulation than single-hemispheric transcranial direct current stimulation.

关键词： transcranial direct current stimulation dual-hemispheric stimulation cortical activation functional MRI primary sensorimotor cortex neuroimaging regeneration neural regeneration

Minimally invasive surgery in gastric cancer

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World Journal of Gastroenterology 2014年第39期20卷 14132-14141页

作者： Sang-yong Son Hyung-ho Kim Department of Surgery Seoul National University Bundang Hospital Seongnam 463-707 South Korea

Minimally invasive surgery for gastric cancer has rapidly gained popularity due to the early detection of early gastric cancer. As advances in instruments and the accumulation of laparoscopic experience increase, laparoscopic techniques are being used for less invasive but highly technical procedures. Recent evidence suggests that the short- and long-term outcomes of minimally invasive surgery for early gastric cancer and advanced gastric cancer are comparable to those of conventional open surgery. however, these results should be confirmed by large-scale multicenter prospective randomized controlled clinical trials.

关键词： Gastric cancer Minimally invasive surgery Laparoscopic gastrectomy

Hydrogen Generation from the Dissociation of Water Using Microwave Plasmas

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Chinese Physics Letters 2013年第6期30卷 144-147页

作者： yong ho Jung Soo Ouk Jang Hyun Jong You Plasma Technology Research Center National Fusion Research InstituteJeonbuk 573-540Korea

Hydrogen is produced by direct dissociation of water vapor,i.e.,splitting water molecules by the electrons in water plasma at low pressure(<10–50 Torr)using microwave plasma *** condition generates a high electron temperature,which facilitates the direct dissociation of water molecules.A microwave plasma source is developed,utilizing the magnetron of a microwave oven and a TE10 rectangular *** quantity of the generated hydrogen is measured using a residual gas *** electron density and temperature are measured by a Langmuir probe,and the neutral temperature is calculated from the OH line intensity.

关键词： microwave dissociation utilizing

Decoding hereditary spastic paraplegia pathogenicity through transcriptomic profiling

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Zoological Research 2023年第3期44卷 650-662页

作者： Nicolas James ho Xiao Chen yong Lei Shen Gu School of Biomedical Sciences Faculty of MedicineThe Chinese University of Hong KongHong Kong SARChina Dr.Li Dak Sum-Yip Yio Chin Center for Stem Cells and Regenerative Medicine and Department of Orthopedic Surgery of the Second Affiliated hospital Zhejiang University School of MedicineHangzhouZhejiang 310058China Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang Province Zhejiang University School of MedicineHangzhouZhejiang 310058China Zhejiang University-University of Edinburgh Institute&School of Basic Medicine Zhejiang University School of MedicineHangzhouZhejiang 310058China Department of Sports Medicine Zhejiang University School of MedicineHangzhouZhejiang 310058China China Orthopedic Regenerative Medicine Group(CORMed) HangzhouZhejiang310058 China School of Medicine The Chinese University of Hong Kong(Shenzhen)ShenzhenGuangdong 518172China The Chinese University of hong Kong(Shenzhen) Shenzhen Futian Biomedical Innovation R&D CenterShenzhenGuangdong 518172China Key Laboratory for Regenerative Medicine Ministry of EducationSchool of Biomedical SciencesFaculty of MedicineThe Chinese University of Hong KongHong Kong SARChina Kunming Institute of Zoology-The Chinese University of hong Kong(KIZ-CUHK)Joint Laboratory of Bioresources and Molecular Research of Common Diseases Hong Kong SARChina hong Kong Branch of CAS Center for Excellence in Animal Evolution and Genetics The Chinese University of Hong KongHong Kong SARChina

Hereditary spastic paraplegia(HSP)is a group of genetic motor neuron diseases resulting from length-dependent axonal degeneration of the corticospinal upper motor *** to the advancement of next-generation sequencing,more than 70 novel HSP disease-causing genes have been identified in the past *** this,our understanding of HSP physiopathology and the development of efficient management and treatment strategies remain *** major challenge in studying HSP pathogenicity is selective neuronal vulnerability,characterized by the manifestation of clinical symptoms that are restricted to specific neuronal populations,despite the presence of germline disease-causing variants in every cell of the ***,disease genes may exhibit ubiquitous expression patterns and involve a myriad of different pathways to cause motor neuron *** the current review,we explore the correlation between transcriptomic data and clinical manifestations,as well as the importance of interspecies models by comparing tissue-specific transcriptomic profiles of humans and mice,expression patterns of different genes in the brain during development,and single-cell transcriptomic data from related ***,we discuss the potential of emerging single-cell RNA sequencing technologies to resolve unanswered questions related to HSP pathogenicity.

关键词： degeneration transcript hereditary

Diastereodivergent Hydrosilylative Enyne Cyclization Catalyzed by N-Heterocyclic Carbene-Ni(o)

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Chinese Journal of Chemistry 2021年第6期39卷 1587-1592页

作者： Meng Yu Xuefeng yong Weiwei Gao Chun-Yu ho Guangdong Province Key Laboratory of Catalysis Department of ChemistrySouthern University of Science and Technology(SUSTech)1088 Xueyuon AvenueShenzhenGuangdong 518055China Shenzhen Grubbs Institute Deportment of ChemistrySouthern University of Science and Technology(SUSTech)1088 Xueyuan AvenueShenzhenGuangdong 518055China

Catalytic diastereodivergent hydrosilylative enyne cyclization with high generality and broad scope was achieved using electronic ac-tivated N-heterocyclic carbene-Ni(O)as a catalyst and R_(3)SiH as silane(IPr^(Cl),syn-:anti-selectivity from up to 98:2 to 7:93 by Z=0,NH ***,R^(1)=n-pentyl).Heterocycles bearing homoallylsilane rather than vinylsilane was obtained *** undesired yet highly competitive reactivity was suppressed,like direct hydrosilylation of alkene and alkyne ***,the homoallylsilane products could be reduced further in one-pot using IPr^(Me) as ligand and(EtO)_(3)SiH as silane under otherwise the same standard condition as the above,offering practical access to additional stereocenters and more diverse product structures from enynes.

关键词： N-Heterocyclic carbenes Enynes Diastereodivergent synthesis Hydrosilylation Hydroalkenylation