检索结果-南通市图书馆

Zeros of Bergman kernels on some Hartogs domains

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2009年第12期52卷 2730-2742页

作者： park jong-Do School of Mathematics Korea Institute for Advanced StudyHoegiro 87Dongdaemun-guSeoul 130-722Korea

Explicit Bergman kernels are obtained on some Hartogs *** some special cases, zeros of the kernels are considered.

关键词： Bergman kernel Lu’s conjecture Lu Qikeng domain 32H02 32F45

Growth arrest signaling of the Raf/MEK/ERK pathway in cancer

在线全文

学校读者我要写书评

暂无评论

Frontiers in Biology 2014年第2期9卷 95-103页

作者： jong-In park Department of Biochemistry Medical College of Wisconsin 8701 Watertown Plank Road Milwaukee WI 53226 USA

The Raf/MEK/extraceUular signal-regulated kinase （ERK） pathway has a pivotal role in facilitating cell proliferation, and its deregulated activation is a central signature of many epithelial cancers. However paradoxically, sustained activity of Raf/MEK/ERK can also result in growth arrest in many different cell types. This anti-proliferative Raf/MEK/ERK signaling also has physiological significance, as exemplified by its potential as a tumor suppressive mechanism. Therefore, significant questions include in which cell types and by what mechanisms this pathway can mediate such an opposing context of signaling. Particularly, our understating of the role of ERK1 and ERK2, the focal points of pathway signaling, in growth arrest signaling is still limited. This review discusses these aspects of Raf/MEK/ ERK-mediated growth arrest signaling.

关键词： Raf MEK1/2 ERK1/2 proliferation growth arrest non-kinase effect

Pullback attractors for the non-autonomous Benjamin-Bona-Mahony equation in unbounded domains

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2011年第4期54卷 741-752页

作者： park jong Yeoul park Sun Hye Department of Mathematics Pusan National University

The existence of a pullback attractor is proven for the non-autonomous Benjamin-Bona-Mahony equation in unbounded *** asymptotic compactness of the solution operator is obtained by the uniform estimates on the tails o... 详细信息

关键词： Benjamin-Bona-Mahony equation pullback attractor unbounded domain

Corrosion and optimum corrosion protection potential of friction stir welded 5083-O Al alloy for leisure ship

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2009年第4期19卷 898-903页

作者： Sung-Hyeon park jong-Shin KIM Min-Su HAN Seong-jong KIM Division of Maritime Transportation System Mokpo Maritime University Korea Register of Shipping Division of Marine Engineering Mokpo Maritime University

Electrochemical tests were undertaken to determine the optimum conditions in seawater for corrosion protection of friction stir-welded 5083-O Al *** trend observations show that the limiting potential that avoids the effects of hydrogen embrittlement is -1.6 V,corresponding to the crossover point between concentration polarization and activation ***,the optimum protection potential is between -1.5 and -0.7 V since the current density at these values is low in the potentiostatic *** a galvanic cell is formed in the seawater,the welds exhibit electrochemically stable *** parts in galvanic tests with various area ratios are stable and have excellent anticorrosion characteristics.

关键词：搅拌摩擦焊接保护电位海水腐蚀铝合金氧铝船舶休闲防腐

Newly diagnosed diabetes mellitus patients presenting with proliferative diabetic retinopathy as an initial sign

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2014年第1期7卷 173-178页

作者： Hoon park Young Gyun Kim jong Wook Lee jong Seok park Department of Ophthalmology Eulji Hospital

AIM: To investigate the clinical features of newly diagnosed diabetes mellitus(NDM) patients showing proliferative diabetic retinopathy(PDR) as an initial sign. ·METHODS: As a retrospective case series,the medical records of a total of four hundred and thirty-two patients who underwent a vitrectomy due to PDR were reviewed to find the subjects. Of 432 patients,six cases of NDM patients showing PDR as an initial sign were included and analyzed with their systemic and ocular features. Main outcome measures: the systemic features and ocular features [preoperative and postoperative best corrected visual acuity(BCVA),intraoperative findings]. ·RESULTS: The mean onset age of visual symptoms was 36.3 years old. The mean serum insulin and C-peptide titer was below the normal range. The mean fasting plasma glucose was 178mg/dL and the mean postprandial 2h plasma glucose was 306mg/dL. The mean HbA1c at diagnosis was 11.02%. In all cases,an acute progressive fibrovascular proliferation was observed. Intraoperative retinal tears were found in three cases of six. The mean preoperative BCVA was +0.67 ± 0.58 logMAR and the mean BCVA at postoperative 6 months was +0.20±0.30 logMAR. ·CONCLUSION: All patients were considered to have latent autoimmune diabetes in adults(LADA). A rapid deterioration of kidney function as well as poor diabetic control status at diagnosis was observed in all six cases. The ocular features of the patients showed acute progressive fibrovascular proliferation and relatively favorable postoperative visual acuity.

关键词： fibrovascular proliferation latent autoimmune diabetes in adults diabetes mellitus proliferative diabetic retinopathy

Uniform Attractors for Non-autonomous Brinkman-Forchheimer Equations with Delay

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2013年第5期29卷 993-1006页

作者： Jum-Ran KANG jong-Yeoul park Department of Mathematics Dong-A University Department of Mathematics Pusan National University

In this paper, we prove the existence of a uniform attractor for non-autonomous Brinkman-Forchheimer equations with general delay and time-dependent external force.

关键词： Brinkman-Forchheimer equations uniform attractor delay translation compact

Development of XY scanner with minimized coupling motions for high-speed atomic force microscope

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2011年第3期18卷 697-703页

作者： park jong-kyu MOON Won-kyu Department of Mechanical Engineering Changwon National University Department of Mechanical Engineering Pohang Univer sity of Science and Technology

The design and fabrication processes of a novel scanner with minimized coupling motions for a high-speed atomic force microscope （AFM） were addressed. An appropriate design modification was proposed through the analyses of the dynamic characteristics of existing linear motion stages using a dynamic analysis program, Recurdyn. Because the scanning speed of each direction may differ, the linear motion stage for a high-speed scanner was designed to have different resonance frequencies for the modes, with one dominant displacement in the desired directions. This objective was achieved by using one-direction flexure mechanisms for each direction and mounting one stage for fast motion on the other stage for slow motion. This unsymmetrical configuration separated the frequencies of two vibration modes with one dominant displacement in each desired direction, and hence suppressed the coupling between motions in two directions. A pair of actuators was used for each axis to decrease the crosstalk between the two motions and give a sufficient force to actuate the slow motion stage, which carried the fast motion stage, A lossy material, such as grease, was inserted into the flexure hinge to suppress vibration problems that occurred when using an input triangular waveforrn. With these design modifications and the vibration suppression method, a novel scanner with a scanning speed greater than 20 Hz is achieved.

关键词： atomic force microscope scanner piezoelectric stack actuator crosstalk flexure hinge

LARGE EDDY SIMULATION (LES) OF TURBULENT FLOW BY FINITE DIFFERENCE METHOD

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2004年第4期16卷 403-409页

作者： KWAG Seung Hyun DOI Yasuaki park jong Chun School of Applied System Engineering Halla University KoreaDepartment of Social and Environmental Engineering Hiroshima University Japan Department of Naval Arch and Ocean Engineering Pusan National University Korea

A Large Eddy Simulation (LES) technique was applied to solve the turbulentchannel flow for Re_τ = 150 . Three types of turbulence models are employed, such as theSmagorinsky model, the Dynamic Sub-Grid Scale(SGS) model and the Generalized Normal Stress (GNS)model. The simulated data in time series for the LES were averaged in both time and space to carryout the statistical analysis. Results of LES were compared with that of a DNS. As an application, aLES technique was used for 2D body in order to check the validation by investigating the turbulentvortical motion around the afterbody with a slant angle.

关键词： large eddy simulation (LES) turbulent flow finite difference method smagorinsky model dynamic sub-grid Scale ( SGS) model generalized normal stress (GNS) model

Arterial stiffness expressed as brachial–ankle pulse wave velocity and gait assessment independent of lower extremity strength:a cross-sectional study in the older men population

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2023年第2期20卷 91-99页

作者： Tae Kyung Yoo Seunghee Lee Sae-jong park jong-Young Lee Department of Medicine MetroWest Medical CenterFraminghamUSA Department of Physical Education Korea UniversitySeoulSouth Korea Division of Sports Science Korea Institute of Sport ScienceSeoulSouth Korea Division of Cardiology Department of Internal MedicineKangbuk Samsung HospitalSungkyunkwan University School of MedicineSeoulSouth Korea

BACKGROUND Older men are more vulnerable to fatal falls than women,and gait disturbances contribute to the risk of *** have assessed the association between arterial stiffness and gait dysfunction,but the results have been *** study aimed to conduct a cross-sectional analysis to evaluate the association between brachial–ankle pulse wave velocity(baPWV)and gait assessment in older *** Data from the 2014–2015 Korea Institute of Sport Science Fitness Standards project were used for the *** inclusion criteria were men aged>65 years with gait assessment[the 30-s chair stand test(30s-CST),the timed up and go(TUG)test,the figure-of-8 walk(F8W)test,the 2-min step test(2MST),and the 6-min walk test(6MWT)]and baPWV measurement *** linear regression analysis was conducted with multiple confounding factor adjustments,including lower extremity isometric *** A total of 291 participants were included in the *** mean age was 71.38±4.40 *** mean values were as follows:(1)30s-CST,17.48±5.00;(2)TUG test,6.01±1.10 s;(3)F8W test,25.65±4.71 s;(4)2MST,102.40±18.83 per 2 min;and(5)6MWT,500.02±85.65 *** multivariable adjustment,baPWV was associated with the 6MWT(β=−0.037,95%CI:−0.072–−0.002),TUG test(β=0,95%CI:0.000–0.001),and F8W test(β=0.002,95%CI:0.000–0.004).baPWV was not associated with the 30s-CST and *** The current study showed a statistically significant association between gait assessments and arterial stiffness,independent of lower extremity ***,this association was *** prospective studies are needed to elucidate the complex relationship between arterial stiffness and gait dysfunction.

关键词： stiffness sectional pulse