http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jiwon Choi(Jiwon Choi),Keesin Jeong(Keesin Jeong),Haiyoung Jung(Haiyoung Jung) 한국화재소방학회 2022 International Journal of Fire Science and Engineer Vol.36 No.4
Dust and fine dust exist in various forms and can lead to various problems such as dust explosion and air pollution. To reduce them, recently, research on electrospray electric precipitation, among various dust collection methods, has been actively conducted. In this study, comparative analysis experiments were performed on microdroplet generation characteristics for direct and indirect charging methods of electrospray electric precipitation. A visualization device was fabricated to generate microdroplets, and microdroplets were photographed with a high-magnification camera according to each charging method. The size and number of microdroplets were then analyzed via ImageJ software.
Jeong, Jiwon,Alfreider, Markus,Konetschnik, Ruth,Kiener, Daniel,Oh, Sang Ho Elsevier 2018 ACTA MATERIALIA Vol.158 No.-
<P><B>Abstract</B></P> <P>To investigate the mechanism of { 10 1 ¯ 2 } twinning in magnesium (Mg) single crystal and its influence on mechanical size effects and strain rate dependent deformation behavior, in-situ microcompression of Mg [ 2 1 ¯ 1 ¯ 0 ] pillars of various sizes from 0.5 μm to 4 μm was carried out in a scanning electron microscope (SEM) and also in a transmission electron microscope (TEM), covering strain rates from 10<SUP>−4</SUP> to 10<SUP>−2</SUP> s<SUP>−1</SUP>. The in-situ observations directly showed that the pile-up of prismatic <<I>a</I>> dislocations acts as local stress concentration for the twin nucleation. Preceding the twin nucleation, the lead dislocation from the dislocation pile-up cross-slips to the basal plane and dissociates into partial dislocations, one of which trails a stacking fault (SF) behind. The twin nucleus of a finite size formed at the junction between prismatic <<I>a</I>> dislocations and basal SFs and subsequently propagated rapidly across the pillar. The present in-situ observations reveal that not only the dislocation pile-up but also the dissociation reaction of <<I>a</I>> dislocations play critical roles in the nucleation of { 10 1 ¯ 2 } twins. Furthermore, the { 10 1 ¯ 2 } twinning exhibits a relatively strong size effect in terms of the twin nucleation stress (size exponent <I>n</I> = 0.7). This pronounced size effect may arise from the fact that the precursor to twin nucleation, namely dislocation pile-up and junction formation, depends more strongly on the crystal size than the ordinary dislocation source operation. Moreover, a noticeable effect of the strain rate is that a higher rate (10<SUP>−2</SUP> s<SUP>−1</SUP>) promotes the activation of basal slip within the { 10 1 ¯ 2 } twin. While the twin nucleation occurs more easily at a high strain rate, here the twin growth rate cannot cope with the applied strain rate, so that strain energy accumulation increases with applied strain. When the twin grows to reach the required twin thickness for basal slip, the basal slip promptly activates within the twinned region to release the accumulated strain energy and plastic deformation swiftly catches up with the applied strain rate.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Sural nerve grafts in subacute facial nerve injuries: a report of two cases
Jiwon Jeong,Yongjoon Chang,Chul Hoon Chung,Soyeon Jung 대한두개안면성형외과학회 2024 Archives of Craniofacial Surgery Vol.25 No.2
Because facial nerve injuries affect the quality of life, leaving them untreated can have devastating effects. The number of patients with traumatic and iatrogenic facial nerve paralysis is considerably high. Early detection and prompt treatment during the acute injury phase are crucial, and immediate surgical treatment should be considered when complete facial nerve injury is suspected. Symptom underestimation by patients and clinical misdiagnosis may delay surgical intervention, which may negatively affect outcomes and in some cases, impair the recovery of the injured facial nerve. Here, we report two cases of facial nerve injury that were treated with nerve grafts during the subacute phase. In both cases, subacute facial nerve grafting achieved significant improvements. These cases highlight surgical intervention in the subacute phase using nerve grafts as an appropriate treatment for facial nerve injuries.
Jeong, Sanghwa,Won, Nayoun,Lee, Jinsik,Bang, Jiwon,Yoo, Jeongsoo,Kim, Sang Geol,Chang, Jeong Ah,Kim, Joonghyun,Kim, Sungjee Royal Society of Chemistry 2011 Chemical communications Vol.47 No.28
<P>A new multiplexed NIR <I>in vivo</I> imaging is showcased by using quantum dots and NaYF<SUB>4</SUB>:Yb<SUP>3+</SUP>,Tm<SUP>3+</SUP> nanoparticles. The ‘temporal’ multiplexing is demonstrated by alternating the excitation wavelengths and unmixing the emissions of different probes. Multiplexed cellular imaging and the cellular trafficking in animal models are shown.</P> <P>Graphic Abstract</P><P>A new multiplexed imaging scheme is demonstrated by alternating the excitation wavelength of quantum dots and NaYF<SUB>4</SUB>:Yb<SUP>3+</SUP>,Tm<SUP>3+</SUP> nanoparticles. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1cc12746b'> </P>