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수냉쿨러의 냉각 효율 향상을 위한 플레이트 부품의 형상에 관한 연구
성윤호,김형찬,김선민,윤석영,이영웅,이상욱 순천향대학교 부설 산업기술연구소 2021 순천향 산업기술연구소논문집 Vol.27 No.2
This study investigates changes in cooling efficiency for heat sink plate width, perforated width, and chamfer angle as part of a parameter study to maximize cooling efficiency of heat sink by setting various variables on plates. The width of the plate is set to 16, 20, 24, 28 mm, perforated width 1.5, 2.0, 2.5 mm, chamfer angles 5, 10, 15 and 20°. By conducting a computational study with Ansys Fluent, the sink plate with plate width of 16mm, perforated width of 3mm and chamfer angle of 10° is shown to be the best cooling efficiency.
A Study on Post-Quantum Cryptography based Defense Card type USB Security Token
Kim Seon-Ung,Kim Joo-Min,Sim Seong-Su,김양하 한국산업경영시스템학회 2021 한국산업경영시스템학회 학술대회 Vol.2021 No.춘계
In this paper, following the recent development of optical transmission device equipped with Post-Quantum Cryptography, it proposes to improve the level of defense security system by applying USB security token with Q-PUF USB technology. Although trends of quantum computer development are currently in progress, quantum computer, which have been developed so far, have exceeded the computational capabilities of existing supercomputers. This allows us to easily decode the public certificates and encryption keys. Although the frequency of using public certificates is decreasing due to the abolition of public certificates in May 2020, Republic of Korea Army still uses public certificates for various defense authentication systems. This reality calls for a stronger security systems. Meanwhile, korean technology companies have developed a portable USB security token that can increase security against the use of the quantum computer, and the author suggests the application of it at the defense environment. This report suggests the application of the defense and its expected effectiveness.
Kim, Ung,Kim, Young Jo,Kang, Sang Wook,Song, In Wook,Jo, Jung Hwan,Lee, Sang Hee,Hong, Geu Ru,Park, Jong Seon,Shin, Dong Gu 영남대학교 의과대학 2007 Yeungnam University Journal of Medicine Vol.24 No.2
Background : The occurrence of atrial fibrillation after ablation of atrial flutter is clinically important. We investigated variables predicting this evolution in ablated patients without a previous atrial fibrillation history. Materials and Methods : Thirty-six patients (Ma1e=28) who were diagnosed as atrial flutter without previous atrial fibrillation history were enrolled in this study. Group 1 (n=11) was defined as those who developed atrial fibrillation after atrial flutter ablation during 1 year follow-up. Group 2 (n=25) was defined as those who has not occurred atrial fibrillation during same follow-up term. Echocardiogram was performed to all patients. We measured left atrial size, left ventricle end diastolic and systolic dimension, ejection fraction and left atrial volume index before and after ablation of atrial flutter. The differences of each variables were compared and analyzed between two groups. Results : The preablation left ventricular ejection fraction (preLVEF) and postablation left ventricular ejection fraction (postLVEF) are 54±14%, 56±13% in group 1 and 47±16%, 52±13% in group 2. The differences between each two groups are statistically insignificant (2.2±1.5 in group 1 vs 5.4±9.8 in group 2, p=0.53). The preablation left atrial size (preLA) and postablation left atrial size (postLA) are 40±4 mm, 41±4 mm in group1 and 44±8 mm, 41±4 mm in group 2. The atrial sizes of both groups were increased but, the differences of left atrial size between two groups before and after flutter ablation were statistically insignificant (0.6±0.9 mm in group 1 vs -3.8±7.4 mm in group 2, p=0.149). The left atrial volume index before flutter ablation was significantly reduced in group 1 than group 2 (32±10 mm³/m², 35±10 mm³/m² in group 1 and 32±10 mm³/m², 29±8 mm³/m² in group 2, p<0.05). Conclusion : The difference between left atrial volume index before and after atrial flutter ablation is the robust predictor of occurrence of atrial fibrillation after atrial flutter ablation without previous atrial fibrillation.
Kim, Won-Ju,Koo, Ja-Hyun,Cho, Hyun-Jung,Lee, Jae-Ung,Kim, Ji Yun,Lee, Hong-Gyun,Lee, Sohee,Kim, Jong Hoon,Oh, Mi Seon,Suh, Minah,Shin, Eui-Cheol,Ko, Joo Yeon,Sohn, Myung Hyun,Choi, Je-Min Mosby 2018 The journal of allergy and clinical immunology Vol.141 No.1
<P><B>Background</B></P> <P>Atopic dermatitis (AD) and psoriasis are the 2 most common chronic inflammatory skin diseases. There is an unmet medical need to overcome limitations for transcutaneous drug development posed by the skin barrier.</P> <P><B>Objective</B></P> <P>We aimed to identify a novel transdermal delivery peptide and to develop a transcutaneously applicable immunomodulatory protein for treating AD and psoriasis.</P> <P><B>Methods</B></P> <P>We identified and generated reporter proteins conjugated to astrotactin 1–derived peptide (AP), a novel transdermal delivery peptide of human origin, and analyzed the intracellular delivery efficiency of these proteins in mouse and human skin cells and tissues using multiphoton confocal microscopy. We also generated a recombinant therapeutic protein, AP–recombinant protein tyrosine phosphatase (rPTP), consisting of the phosphatase domain of the T-cell protein tyrosine phosphatase conjugated to AP. The immunomodulatory function of AP-rPTP was confirmed in splenocytes on cytokine stimulation and T-cell receptor stimulation. Finally, we confirmed the <I>in vivo</I> efficacy of AP-rPTP transdermal delivery in patients with oxazolone-induced contact hypersensitivity, ovalbumin-induced AD-like, and imiquimod-induced psoriasis-like skin inflammation models.</P> <P><B>Results</B></P> <P>AP-conjugated reporter proteins exhibited significant intracellular transduction efficacy in keratinocytes, fibroblasts, and immune cells. In addition, transcutaneous administration of AP-dTomato resulted in significant localization into the dermis and epidermis in both mouse and human skin. AP-rPTP inhibited phosphorylated signal transducer and activator of transcription (STAT) 1, STAT3, and STAT6 in splenocytes and also regulated T-cell activation and proliferation. Transcutaneous administration of AP-rPTP through the paper-patch technique significantly ameliorated skin tissue thickening, inflammation, and cytokine expression in both AD-like and psoriasis-like dermatitis models.</P> <P><B>Conclusion</B></P> <P>We identified a 9-amino-acid novel transdermal delivery peptide, AP, and demonstrated its feasibility for transcutaneous biologic drug development. Moreover, AP-rPTP is a novel immunomodulatory drug candidate for human dermatitis.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Comparative analysis of chloroplast genomes and 45S nuclear ribosomal DNAs within 9 perilla species
Seon-Hwa Bae,In-Seon Jeong,Ye-Ji Lee,Myoung-Hee Lee,Jeong-Hee Lee,Ung-Han Yoon,Jang-Ho Hahn,Tae-Ho Kim 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Perilla is a annual herb plant of the mint family, Laminaceae and mainly cultivated in eastern Asia, i.e. Korea, China and Japan. In response to an increased interest for healthy supplement food from the public, people are focusing on the properties of perilla. The applicable parts of perilla plants are the leaves and seeds. Perilla has been cultivated as a source of unsaturated fatty acid oil. But in spite of advantage of the important nutritional traits the genome or molecular studies on perilla remains largely unknown. Sequence comparisons of chloroplast (cp) genomes or nuclear ribosomal DNA (nrDNA) are of great important to provide a evidence for taxonomic studies or species identification or understanding mechanisms that underlie the evolution of perilla species. So, we tried to study a structural analysis of perilla genome and 45s nrDNA using 9 species (3 Diploid; Perilla B-17, P. hirtella, P. setoyensis / 6 Tetraploid; YCPL 285, YCPL 170, YCPL 205-1, YCPL 181-1, YCPL 177-1, YCPL 207-1). The complete cp genome and nrDNA of 9 perilla species were determined using Illumina sequencing technology and analyzed on the variance in base level between perilla B-17 and salvia miltiorrhiza. Total chloroplast genome size of perilla B-17 as a reference was 152,589 bp in length. We also identified an slightly overlapped intergenic regions between salvia miltiorrhiza and B-17. The results above will contribute to growing of molecular or genome structure and functional genomics of perilla available in studying perilla biology. For further study, we will look for genetic diversity of perilla species.
헤수스 페르난데스 산또스의 단편집 『까까머리 Cabeza rapada』에 대한 연구
김선웅 ( Kim Seon Ung ) 한국스페인어문학회 2003 스페인어문학 Vol.0 No.29
La estructura mantenida habitual del cuento literario, caracterizado por tener una historia con argumento y un final sorpresivo y contener una moraleja, se modifica y frecuenta un final abierto y hechos triviales en la generacio´n del medio siglo. La tema´tica de los cuentos del medio siglo continu´a la misma li´nea de sus novelas: son un testimonio del individuo, de los problemas sociales, en general, causados por la guerra civil. La conversio´n de un pasatiempo en un medio de testimonio social con una te´cnica sencilla y directa fue una verdadera renovacio´n en el a´mbito cuenti´stico espan~ol a lo largo del siglo XX. Los escritores de los an~os cincuenta fueron los que vivieron la reforma social de la posguerra y los que ma~s se acercaron a las te´cnicas de la narracio´n europea y americana. Buscaron nuevas formas para la narracio´n y fueron los que con ma´s empen~o intentaron desprenderse de los antiguos ha´bitos. El leit motiv de los cuentos de Ferna´ndez Santos se basa en las huellas de la contienda y la soledad de los personajes. Teniendo en cuenta esta base, la cri´tica social en esta coleccio´n de relatos se ramifica en diversas direcciones: la crueldad y realidad de la guerra, la desmitificacio´n del mundo de los adultos, la incomprensio´n de adultos hacia los adolescentes, el problema de las condiciones laborales y el apartamiento de la sociedad. La publicacio´n de Cabeza rapada de Ferna´ndez Santos consolida la corriente cuenti´stica, que florecio´ con e´xito entre los narradores del medio siglo. A partir de esta li´nea ba´sica de valoracio´n, la primera coleccio´n de ralatos de Fernndez Santos pone de manifiesto que no so´lo cuenta un suceso sino que puntualiza, cargado de contenidos, sobre realidades innegables y tangibles.