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Comparison of ERP Patterns by Suction and Puff Stimulus
( Ji Hye Baek ),( Mi Hyun Choi ),( Ul Ho Jeong ),( Sung Jun Park ),( Seon Young Gim ),( Hyung Sik Kim ),( Soon Cheol Chung ) 한국감성과학회 2015 추계학술대회 Vol.2015 No.-
The aim of this study was to compare event-related potential (ERP) patterns activated somatosensory area (C3) and motor area (FC5) about suction and puff stimulus by applying these stimuli to the fingers. Twelve healthy right-handed men (mean age = 23.1 ± 2.0 years) participated in the study. One session consisted of a Rest Phase (9sec) and a Suction or Puff Phase (3sec). During the Rest Phase, the subjects were instructed to relax and get a ready without any stimulus being applied. During the Suction or Puff Phase, suction or puff stimulus of same intensity (4 psi) was applied to the first joint of the right index finger. Subjects performed 1 session (30 trials) for each suction and puff stimulus. 1 session is repeated twice. After completion of the session, a subjective magnitude test was presented. We extracted the maximum positive amplitude, minimum negative amplitude and relevant latency values from ERP signals from C3 and FC5. Suction and puff stimuli had similar subjective magnitude scores. For C3, the maximum positive latency (suction: 82ms, puff: 100ms) (p = .001) and minimum negative amplitude latency (suction: 167ms, puff: 188ms) (p<.001) was appeared earlier for the suction stimulus than for the puff stimulus. For FC5, the maximum positive latency (suction: 81ms, puff: 90ms) (p = .013) and minimum negative amplitude latency (suction: 168ms, puff: 186ms) (p = .010) was appeared earlier for the suction stimulus than for the puff stimulus. The suction stimulus caused a more sensitivity in the somatosensory area (C3) and motor area (FC5) than did the puff stimulus during suction and puff stimuli of the same intensity.
Baek, Ji Hye,Choi, Myung Gil,Kim, Da Bin,Kim, Na Yeong,Kang, Eungyu,Ahn, Sangdoo,Chang, Suk-Kyu Elsevier 2018 Tetrahedron letters: the international organ for t Vol.59 No.13
<P><B>Abstract</B></P> <P>A new fluorescent probe for the selective detection of industrially important peracetic acid (PAA) was developed via oxidative cleavage of the phenylselenyl ether derivative of the 4-hydroxynaphthalimide. The probe showed no noticeable changes towards common oxidants and environmentally relevant metal ions and anions. Furthermore, PAA signaling was not influenced by the presence of background ionic species, except for certain redox-active species. Practical application of the probe to the determination of PAA in tap water and atmosphere was successfully executed using a smartphone as a stand-alone signal capturing and processing device.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A new peracetic acid (PAA)-selective reaction-based fluorescent probe was developed. </LI> <LI> Signaling was due to the PAA-assisted oxidative cleavage of selenyl ether. </LI> <LI> Selective signaling was possible over other common oxidants, metal ions, and anions. </LI> <LI> Using a smartphone as a stand-alone device, PAA detection in tap water was possible. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Space Weather Monitoring System for Geostationary Satellites and Polar Routes
Baek, Ji-Hye,Lee, Jae-Jin,Choi, Seong-Hwan,Hwang, Jung-A,Hwang, Eun-Mi,Park, Young-Deuk 한국천문학회 2011 天文學會報 Vol.36 No.2
We have developed solar and space weather monitoring system for space weather users since 2007 as a project named 'Construction of Korea Space Weather Prediction Center'. In this presentation we will introduce space weather monitoring system for Geostationary Satellites and Polar Routes. These were developed for satisfying demands of space weather user groups. 'Space Weather Monitoring System for Geostationary Satellites' displays integrated space weather information on geostationary orbit such as magnetopause location, nowcast and forecast of space weather, cosmic ray count rate, number of meteors and x-ray solar flux. This system is developed for space weather customers who are managing satellite systems or using satellite information. In addition, this system provides space weather warning by SMS in which short message is delivered to users' cell phones when space weather parameters reach a critical value. 'Space Weather Monitoring System for Polar Routes' was developed for the commercial airline companies operating polar routes. This provides D-region and polar cap absorption map, aurora and radiation particle distribution, nowcast and forecast of space weather, proton flux, Kp index and so on.
Baek, Ji Hye,Gu, Man Bock,Sang, Byoung-In,Kwack, Seung Jun,Kim, Kyu Bong,Lee, Byung Mu Informa UK (TaylorFrancis) 2009 Journal of toxicology and environmental health. Pa Vol.72 No.21
<P>Di-(2-ethylhexyl) phthalate (DEHP), one of the major phthalates, was reported to be a suspected endocrine-disrupting chemical (EDC) that might produce developmental or reproductive toxicities. Therefore, much effort was undertaken to reduce the potential risk of adverse effects of DEHP on humans by diminishing environmental exposure to this chemical. A bacterium was isolated from soil contaminated with DEHP at a poly(vinyl chloride) (PVC) manufacturing site. Biodegradation kinetic experiments on DEHP-contaminated soil samples were performed in a slurry phase system. The DEHP concentration was decreased to a concentration of 0.5 g/kg by the addition of 1% culture medium to the soil. The microorganism degraded DEHP through the formation of a mono-2-ethylhexyl phthalate (MEHP), which was subsequently metabolized to phthalic acid (PA), as detected by GC-MS analysis. Micrococcus luteus was able to degrade almost 90% of the initial DEHP within 12 d. In addition, the microbial toxicity study of DEHP and its degradation products MEHP or PA, using recombinant bioluminescent bacteria, showed that PA or the mixture produced protein or DNA damage. Data thus suggest that a new strain of Micrococcus luteus with a strong ability to degrade DEHP into nontoxic metabolites may contribute to decontamination of environmental phthalates and consequently risk reduction of human exposure to DEHP.</P>
Nursing Students’ Disaster Awareness, Disaster Preparedness, and Disaster Nursing Competency
Hye-Mi PARK,Tae-Hoon KIM,Jae-Young KIM,Ji-Eun KIM,Ji-Eun KIM,Ga-Eul PARK,Ji-Won BAEK,Yu-Jin SHIN,Ji-Yeon KIM,김윤미 한국웰빙융합학회 2023 웰빙융합연구 Vol.6 No.4
Purpose: This study aims to provide basic data to improve disaster nursing competency by identifying nursing students’ disaster awareness, disaster preparedness, and disaster nursing competency and confirming the relationship among them. Research design, data, and methodology: The subjects of this study were 310 students attending the Department of Nursing at E University in Gyeonggi-do, and the data was collected from April 13 to May 24, 2023. Results: Disaster awareness averaged 72.91±7.46 points, disaster preparedness averaged 2.82±2.81 points, and disaster nursing competency averaged 44.11±10.76 points. Disaster preparedness and disaster nursing competency were significantly higher in subjects with disaster nursing education experience than in those without experience. Disaster awareness showed a significant positive correlation with disaster preparedness (r=.20, p <.001), and also with disaster nursing competency (r=.37, p <.001). Disaster preparedness showed a significant positive correlation with disaster nursing competency (r=.49, p <.001). It was found that the disaster nursing competency was high when the disaster awareness (B=0.472, p<.001), and the disaster preparedness (B=1.561, p<.001) was high. Conclusions: The results show it is possible to improve students' disaster nursing competency by strengthening education on disaster awareness and disaster preparedness. Thus, specific efforts and future research are needed to develop disaster nursing education.
Predictors of Silicone Tube Intubation Success in Patients with Lacrimal Drainage System Stenosis
Ji Sun Baek,Saem Lee,Jung Hye Lee,Hye Sun Choi,Jae Woo Jang,Sung Joo Kim 대한안과학회 2016 Korean Journal of Ophthalmology Vol.30 No.3
Purpose: To evaluate prognostic factors affecting silicone tube intubation outcomes in Asian patients with lacrimaldrainage system stenosis. Methods: A retrospective review was conducted on the medical records of 822 patients (1,118 eyes) who hadundergone silicone tube intubation to treat lacrimal drainage system stenosis between January 2011 andDecember 2012. Patients were divided into two groups: a success group and a failure group. Success wasdefined as the disappearance of epiphora symptoms, normalization of tear meniscus height, and the easypassage of fluid without resistance on the postoperative syringing test. Patient and ocular parameters werecompared between the success and failure groups. Results: A total of 994 eyes of 727 patients were included in analyses. Patients had a mean follow-up period of34.11 ± 18.70 weeks. Silicone tube intubation was successful in 67.2% of participants. Significant differencesbetween the success and failure groups were found for age (p < 0.001), history of ipsilateral facial palsy (p= 0.028), follow-up period (p < 0.001), and degree of passage on the preoperative syringing test (p = 0.001). Only age (p < 0.001) and degree of passage on the preoperative syringing test (p = 0.002) remained significantlyassociated with silicone tube intubation success in multivariate analysis. Conclusions: Age was negatively associated with silicone tube intubation success in patients with lacrimaldrainage system stenosis. The success rate was higher in patients who showed easy passage of fluid withoutresistance on the preoperative syringing test. These factors should be considered by surgeons planning siliconetube intubation in patients with lacrimal drainage system stenosis.