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Pressure field of a rotating square plate with application to windborne debris
Martinez-Vazquez, P.,Kakimpa, B.,Sterling, M.,Baker, C.J.,Quinn, A.D.,Richards, P.J.,Owen, J.S. Techno-Press 2012 Wind and Structures, An International Journal (WAS Vol.15 No.6
Traditionally, a quasi steady response concerning the aerodynamic force and moment coefficients acting on a flat plate while 'flying' through the air has been assumed. Such an assumption has enabled the flight paths of windborne debris to be predicted and an indication of its potential damage to be inferred. In order to investigate this assumption in detail, a series of physical and numerical simulations relating to flat plates subject to autorotation has been undertaken. The physical experiments have been carried out using a novel pressure acquisition technique which provides a description of the pressure distribution on a square plate which was allowed to auto-rotate at different speeds by modifying the velocity of the incoming flow. The current work has for the first time, enabled characteristic pressure signals on the surface of an auto-rotating flat plate to be attributed to vortex shedding.
Pressure field of a rotating square plate with application to windborne debris
P. Martinez-Vazquez,B. Kakimpa,M. Sterling,C.J. Baker,A.D. Quinn,P.J. Richards,J.S. Owen 한국풍공학회 2012 Wind and Structures, An International Journal (WAS Vol.15 No.6
Traditionally, a quasi steady response concerning the aerodynamic force and moment coefficients acting on a flat plate while ‘flying’ through the air has been assumed. Such an assumption has enabled the flight paths of windborne debris to be predicted and an indication of its potential damage to be inferred. In order to investigate this assumption in detail, a series of physical and numerical simulations relating to flat plates subject to autorotation has been undertaken. The physical experiments have been carried out using a novel pressure acquisition technique which provides a description of the pressure distribution on a square plate which was allowed to auto-rotate at different speeds by modifying the velocity of the incoming flow. The current work has for the first time, enabled characteristic pressure signals on the surface of an auto-rotating flat plate to be attributed to vortex shedding.
Park, Y. I.,Postupna, O.,Zhugayevych, A.,Shin, H.,Park, Y.-S.,Kim, B.,Yen, H.-J.,Cheruku, P.,Martinez, J. S.,Park, J. W.,Tretiak, S.,Wang, H.-L. Royal Society of Chemistry 2015 Chemical Science Vol.6 No.1
<▼1><P>Fabrication of a unique white light LED from a stimuli-responsive organic molecule is reported. Emission properties are dominated by the pH of the solution through intermolecular charge transfer.</P></▼1><▼2><P>A new, pH dependent and water-soluble, conjugated oligomer (amino, trimethylammonium oligophenylene vinylene, <B>ATAOPV</B>) was synthesized with a quaternary ammonium salt and an aromatic amine at the two ends of a π-conjugated oligomer, thus creating a strong dipole across the molecule. A unique white light LED is successfully fabricated from a stimuli responsive organic molecule whose emission properties are dominated by the pH value of the solution through controlled intermolecular charge transfer.</P></▼2>
IPCC AR6 WGI 아틀라스 주요 내용과 핵심 결과
윤진호,J. M. Gutierrez,R. G. Jones,G. T. Narisma,L. M. Alves,M. Amjad,I. V. Gorodetskaya,M. Grose,N. A. B. Klutse,S. Krakovska,J. Li,D. Martinez-Castro,L. O. Mearns,S. H. Mernild,T. Ngo-Duc,B. van den Hu 한국기상학회 2021 한국기상학회 학술대회 논문집 Vol.2021 No.10
이번 기후변화 보고서에서는 기존의 보고서와는 달리 Interactive Atlas 라는 온라인 표출 방식을 활용하였다. 이 챕터는 5차보고서에서는 부록의 형태였으나 6차보고서에서는 완전히 독립된 챕터로 기존보고서의 지역기후변화 진단을 포함하는 내용으로 구성되었다.
Leonardo Almeida,Daniel Martinez-Ramirez,Peter J. Rossi,Zhongxing Peng,Aysegul Gunduz,Michael S. Okun 대한신경과학회 2015 Journal of Clinical Neurology Vol.11 No.2
Tourette syndrome is a childhood-onset disorder characterized by a combination of motor andvocal tics, ofen associated with psychiatric comorbidities including attention defcit and hyperactivity disorder and obsessive-compulsive disorder. Despite an onset early in life, half of patients may present symptoms in adulthood, with variable degrees of severity. In select cases,the syndrome may lead to signifcant physical and social impairment, and a worrisome riskfor self injury. Evolving research has provided evidence supporting the idea that the pathophysiology of Tourette syndrome is directly related to a disrupted circuit involving the cortexand subcortical structures, including the basal ganglia, nucleus accumbens, and the amygdala. Tere has also been a notion that a dysfunctional group of neurons in the putamen contributes to an abnormal facilitation of competing motor responses in basal ganglia structures ultimately underpinning the generation of tics. Surgical therapies for Tourette syndrome have beenreserved for a small group of patients not responding to behavioral and pharmacological therapies, and these therapies have been directed at modulating the underlying pathophysiology. Lesion therapy as well as deep brain stimulation has been observed to suppress tics in at leastsome of these cases. In this article, we will review the clinical aspects of Tourette syndrome, aswell as the evolution of surgical approaches and we will discuss the evidence and clinical responses to deep brain stimulation in various brain targets. We will also discuss ongoing research and future directions as well as approaches for open, scheduled and closed loop feedback-driven electrical stimulation for the treatment of Tourette syndrome.
Electrochemical Study of Three Stainless Steel Alloys and Titanium Metal in Cola Soft Drinks
Peralta-Lopez, D.,Sotelo-Mazon, O.,Henao, J.,Porcayo-Calderon, J.,Valdez, S.,Salinas-Solano, G.,Martinez-Gomez, L. The Korean Electrochemical Society 2017 Journal of electrochemical science and technology Vol.8 No.4
Stainless steels and titanium alloys are widely used in the medical industry as replacement materials. These materials may be affected by the conditions and type of environment. In the same manner, soft drinks are widely consumed products. It is of interest for dental industry to know the behavior of medical-grade alloys when these are in contact with soft drinks, since any excessive ion release can suppose a risk for human health. In the present study, the electrochemical behavior of three stainless steel alloys and pure titanium was analyzed using three types of cola soft drinks as electrolyte. The objective of this study was to evaluate the response of these metallic materials in each type of solution (cola standard, light and zero). Different electrochemical techniques were used for the evaluation of the alloys, namely potentiodynamic polarization, linear polarization, and open-circuit potential measurements. The corrosion resistance of the stainless-steel alloys and titanium in the cola soft drinks was provided by the formation of a stable passive film formed by metal oxides. Scanning electron microscopy was used as a complementary technique to reveal corrosion phenomena at the surface of the materials evaluated.