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정전분무를 이용한 패턴화된 생물현탁액 액적의 유량에 따른 변화 연구
정상빈,장경수,이건웅,정의석,허기준,이병욱,Jeong, Sang Bin,Jang, Kyung Soo,Lee, Gunwoong,Chong, Euiseok,Heo, Ki Joon,Lee, Byung Uk 한국입자에어로졸학회 2015 Particle and Aerosol Research Vol.11 No.4
An electrospray patterning method has been considered as a new and effective way for controlling very fine droplets. Drop-on-demand patterning for unstained nutrient broth on wafers was newly conducted with an electrospray pulsed jet. The patterns had been made under varying experimental conditions including flow rate, vibration frequency, and translational speed of the electrospray patterning system. In this experiment, especially, variation of nutrient broth droplet was measured under varying flow rate conditions. This new technique has a potential to be applied in biology experiments and hormone medical industry.
Clinical Features and Risk Factors for Complications of Facial Herpes Zoster in Inpatients
정상빈,김승종,서무규,이관 대한의진균학회 2022 대한의진균학회지 Vol.27 No.4
Background: Few studies have been reported on facial herpes zoster and the risk factors for its complications. Objective: This study aimed to investigate the clinical features and risk factors with facial herpes zoster. Methods: We examined the medical records of 676 patients with facial herpes zoster during a 10-year-period from 2011 to 2020. We assessed the proportion of ocular complications, Ramsay-Hunt syndrome, and postherpetic neuralgia in patients with facial herpes zoster according to several clinical factors including age, sex, dermatomes, underlying disease, and time to initiate antiviral treatment. Results: The incidence of ocular complications was significantly higher in males (Odds ratia [OR], 2.59; 95% CI, 1.26~5.32), and with involvement of ophthalmic branches of the trigeminal nerve (V1: OR, 14.28; 95% CI, 3.62~56.29; V1 inclusion: OR, 20.68; 95% CI, 7.99~53.55), underlying diseases (OR, 1.70; 95% CI, 1.08~2.68) and positive Hutchinson's sign (OR, 3.59; 95% CI, 1.72~7.49). Ramsay-Hunt syndrome was significantly correlated with involvement of VII dermatome (OR, 24.68; 95% CI, 2.97~204.75), and showed considerable significant with otalgia (OR, 3.31; 95% CI 0.98~11.22). Postherpetic neuralgia was significantly higher in those over 60 years of age (OR, 2.03; 95% CI, 1.48~2.78), ocular complications (OR, 2.28; 95% CI, 1.57~3.30), and ear involvement (OR 1.94; 95% CI 1.17~3.20). Conclusion: These results demonstrated that facial herpes zoster was associated with ocular complications, Ramsay- Hunt syndrome, and postherpetic neuralgia. The incidence of these complications was related to risk factors such as sex, age, dermatome, underlying disease, Hutchinson's sign and otalgia. To decrease the risk of complications associated with facial herpes zoster, patients should receive appropriate antiviral therapy and interdepartmental consultations immediately.
도심 내 버스정류장 부근의 에어로졸 입자 크기 및 형상 관찰
정상빈,허기준,신창훈,조원경,이병욱,Jeong, Sang Bin,Heo, Ki Joon,Sin, Chang Hoon,Zhao, YuanQing,Lee, Byung Uk 한국입자에어로졸학회 2016 Particle and Aerosol Research Vol.12 No.4
People in metropolitan cities can be exposed to particulate air pollutants at public transportation systems such as bus stops. In this study, we sampled aerosol particles with an impactor at a bus stop. We analyzed the shapes of these particles with an optical microscope. It was estimated that fibers, silicons, byproducts of combustion, and pollens existed in the air environments at the bus stop with analysis of shapes of sampled particles.
소비자 리뷰 특성이 모바일 커머스 성과에미치는 영향에 관한 연구
정상빈(Jeong, Sangbin),김광용(Gim, Gwangyong),임은택(Im, Euntack),김도연(Kim, Dohyeon) 글로벌경영학회 2020 글로벌경영학회지 Vol.17 No.6
모바일 기술과 네트워크 기술의 발전으로 소비자들은 언제 어디서든 자신이 구매하고자 하는 제품에 대하여 탐색하고 제품을 비교함으로써 최종적으로 구매하는 것이 가능하다. 이러한 유형의 상거래를 모바일 커머스(mobile commerce)라고 정의할 수 있으며 최근에는 스마트폰 이용률이 높아지면서 전통적인 전자상거래(e-commerce)의 성장세를 뛰어넘어 빠르게 성장하고 있다. 하지만 모바일 커머스는 PC 기반 인터넷 중심의 전통적인 전자상거래에 비해 작은 화면과 이동 중에 이뤄진다는 점 때문에 소비자는 자신의 제한적인 정보 획득 공간과 시간에서 정보를 습득하여 의사결정을 해야 한다. 따라서 모바일 커머스의 특성이 잘 갖춰진 환경에서 정보의 특성이 고객 의사결정에 어떠한 영향을 미치는지에 대한 연구가 필요하다. 본 논문은 싱가포르의 모바일 커머스 전문 플랫폼인 Shopee에서 판매 중인 남성용 티셔츠에 대한 계량적 리뷰와 텍스트 리뷰, 가격, 선호도와 판매량의 데이터를 HTMP parsing의 크롤링을 통해 수집하여 텍스트 리뷰는 빈도 분석과 LDA( Latent Dirichlet allocation) 토픽 모델링을 통해 특성과 키워드로 추출하고 Google language API를 통해 감성 분석함으로써 리뷰의 비계량적 특성을 측정하였다. 그 후 선형 회귀분석을 통해 선호도와 구매 의사결정에 리뷰 특성이 어떠한 영향을 미쳤는지 파악하였다. 분석 결과, 비계량적 리뷰 특성에서는 크기를 특성들이 선호도와 판매성과에 유의미한 영향을 미쳤다. 계량적 특성에서는 평균 평점이 선호도에는 유의미한 영향을 미치지 못하였으나 판매성과에 리뷰 총량과 함께 유의미한 영향을 미쳤다. 이를 통해 리뷰의 특성이 선호도와 판매성과에 유의미한 영향을 미치며 의사결정 목적에 따라 다른 의사결정 과정을 거친다는 것을 확인하였다. Since advances in mobile and network technology, consumers can purchase products anytime, anywhere by exploring and comparing products they want to buy. And this type of commerce can be defined as mobile commerce, and more recently, as smartphone usage has grown, surpassing the growth of traditional. However, mobile commerce is used in online virtual space on a smaller screen compared to traditional. Therefore, it is necessary to study how the characteristics of information provided by mobile commerce affect customer decision making. This paper collected data on quantitative reviews and text reviews, prices, favorites and sales volume through the crawling of HTML parsing from men s T-shirts on sale at Shopee, Singapore s mobile commerce specialized platform. From text review, characteristics and keywords were extracted through frequency analysis and LDA (Latent Dirichlet allocation) topic modeling. The sentiment attributes of the product review were analyzed based on keywords through the google language API. Finally, a linear regression analysis performed how the review characteristics affected the favorite and purchasing decision. As a result of the analysis, size characteristics, in the non-measuring review characteristics, don’t had a significant impact on favorites and sales. In quantitative characteristics, the average rating did not have a significant impact on preference, but it had a significant effect on sales performance with the total amount of reviews. This research confirms that the characters of the review have a significant impact on favorite and sales performance and is subject to different decision-making processes depending on the decision-making objective.
바이오에어로졸 저감을 위한 가시광활성 항바이오 에어필터 연구
정상빈(Sang Bin Jeong),이동욱(Donguk Lee),이병진(Byeong Jin Lee),허기준(Ki Joon Heo),고현식(Hyun Sik Ko),신재학(Jae Hak Shin),최동윤(Dong Yun Choi),정재희(Jae Hee Jung) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Public health continues to be threatened by bioaerosols. Herein, we introduce visible-light-activated (VLA) antimicrobial air filters for reducing and inactivation of bioaerosols. The VLA photosensitive organic dye (e.g., crystal violet) were stably immobilized using the silica/alumina sol-gel coating method. The coated air filters showed excellent antimicrobial activity against both bacteria and viruses under visible-light exposure conditions (>99.9%), especially in natural light (>99.99%). In addition, the VLA antimicrobial mechanisms were identified by quantifying the generated reactive oxygen species (ROS) through biochemical analysis.