• Clinical and Experimental Vaccine Research
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• 제12권2호
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• pp.134-142
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• 2023

Purpose: The aim of this study was to determine the scope of knowledge, attitudes, and behaviors of pregnant women about the coronavirus disease 2019 (COVID-19) vaccine. Materials and Methods: A total of 886 pregnant women were recruited for the study. A cross-sectional questionnaire was conducted on these selected participants. Data about past infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), SARS-CoV-2 infection of closely related people, and deaths due to COVID-19 among their relatives were questioned. Results: The rate of vaccination was higher (64.1%) in pregnant women with higher education levels. Informing about the vaccine, especially by health professionals, showed that the rates of vaccination (25%) increased (p<0.001). In addition, a significant increase was observed in vaccination rates with increasing age and financial income (p<0.001). Conclusion: The main limitation of our study is that the vaccine, which was approved for "emergency use", was just started to be administered to pregnant women during the study. Our findings show that our target audience, low-income, low-education, younger pregnant women should be given more attention than those who apply to the doctor for routine follow-up.

• Proceedings of the Korean Nutrition Society Conference
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• 한국영양학회 2004년도 춘계학술대회
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• pp.155-155
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• 2004

• Bulletin of the Korean Chemical Society
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• 제30권11호
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• pp.2812-2814
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• 2009

• Journal of the Korean Chemical Society
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• 제56권1호
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• pp.20-27
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• 2012

Complex permittivity spectra of Allyl Chloride (AC), 2-Butanone (2-BU) and their binary mixtures over the entire range of concentration were obtained using the Time Domain Reflectometry (TDR) technique in microwave frequency range at various temperatures. Static dielectric constant and relaxation time are obtained from complex permittivity spectra. Density ($\rho$) and refractive index ($n_D$) are also measured. These parameters are used to determine excess dielectric constant, excess inverse relaxation time, excess molar volume, excess molar refraction, polarity, Bruggeman factor and thermodynamic parameters viz. enthalpy of activation and entropy of activation. The values of static dielectric constant and relaxation time increases while density and refractive index decreases with the percentage of 2-Butanone in Allyl Chloride increases. Excess parameters were fitted to a Redlich-Kister equation.

• Bulletin of the Korean Chemical Society
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• 제32권11호
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• pp.3887-3892
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• 2011

An efficient synthesis of 1,5-Benzothiazepines via Michael addition of corresponding (E)-1-(2-hydroxyphenyl)-3-(4-(phenylthio)phenyl)prop-2-en-1-one is described under ultrasound irradiation. A series of novel 2-((E)-2,3-dihydro-2-(4-(phenylthio)phenyl)benzo[b][1,4]thiazepin-4-yl)phenol derivatives was confirmed on the basis of $^1H$ NMR, Mass, IR spectral data and Elemental analysis. The synthesized compounds were evaluated for their antimicrobial activities. Most of the compounds were found to be comparable potent than the reference standard drugs. Utilization of ultrasound irradiation, simple reaction conditions, isolation, and purification makes this manipulation very interesting from an economic and environmental perspective.

• Journal of Chest Surgery
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• 제50권5호
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• pp.378-381
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• 2017

Patients with an atrial septal defect (ASD) and severe pulmonary arterial hypertension (PAH) are considered ineligible for defect closure surgery because of the risk of right ventricular decompensation and death after the operation. We report the case of a patient with large ASD and severe PAH who was able to undergo defect closure surgery successfully following long-term use of combined oral sildenafil and beraprost.

• Proceedings of the KSPS conference
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• 대한음성학회 2002년도 11월 학술대회지
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• pp.47-50
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• 2002

This paper is to introduce 'Dr. Speaking', which was recently developed by Eonon Inc.. 'Dr. Speaking' is an English pronunciation tutoring system. This has three distinguishing features. First, it teaches how to organize a speaker's vocal organs to pronounce accurately. Second, after it compares a speaker's pronunciation with that of a native speaker's, it grades that speaker's pronunciation level according to phonetic standards. Third, it provides proper information necessary for correcting a speaker's incorrect pronunciation. It is not always easy for a tutoring system to execute the above three almost simutaneously. However, 'Dr. Speaking' proved itself that it is possible by adding speech technology (e.g. speech recognition) to phonetic knowledge.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 한국산업정보학회 1999년도 추계공동학술대회 논문집:21세기지식경영과 정보기술
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• pp.463-474
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• 1999

본 시스템은 1997년부터 추진된 지역정보화 사업의 추진 과제인 $\boxDr$과학기술정보시스템$\boxUl$ 과 $\boxDr$중소기업지원 정보시스템$\boxUl$ 을 확대 발전시키고 시스템 운영의 효율화를 도모하고자 DB를 통합하여 확대 재 구축함으로써 서비스 수준을 한 단계 높이고 고객 중심의 정보 이용 활성화 차원에서 추진되었다. 기 구축되었던 $\boxDr$과학기술정보시스템$\boxUl$ 과 $\boxDr$중소기업지원정보시스템$\boxUl$ 은 정보화를 통한 지역경제 발전에 일익을 담당하고자 관. 산. 학. 연이 참여한 지역정보화 사업이다. 이번에 확대 개발된 $\boxDr$과학산업종합정보시스템$\boxUl$ 은 연구개발정보센터로부터 자금 지원을 받아 구축한 시스템으로 크게 과학기술정보, 무역지원정보, 기업정보, 기업지원정보, 인력정보, 도서관정보, 시민광장 등을 중심으로 구성하였다. 특히 지역 기업체의 해외 마케팅 강화를 위한 무역지원정보는 상품전시관, 무역/거래알선, 무역통상정보 등 지역기업활동 지원 및 수출진흥을 도모하고 지역경제 활성화에 기여토록 하고자 한다.

• Journal of Electrical Engineering and Technology
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• 제12권6호
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• pp.2157-2165
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• 2017

This study deals with the design of the mechanism in which demand response (DR) resources are traded in the power generation market. In general, a DR aggregator (DRA), which extends DR resources and provides technical support, is central to this mechanism. In this study, power users, called DR customer (DRC), participate in load reduction and are also modeled to participate directly in DR-related bidding. The DRA provides incentives to the DRC, indirectly impacting the market, and the DRC use the bid parameters strategically. We present the conditions for finding Nash Equilibrium (NE) in game problems of various participants including market operators, and analyze the characteristics of DRA and DRC related models. It also analyzes the impact of the participants on the market according to various types of competition and coalitions between DRA and DRC.

• The Transactions of the Korean Institute of Electrical Engineers A
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• 제50권11호
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• pp.506-513
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• 2001

The islanding detection for distributed resources (DR) becomes an important and emerging issue in power system protection since the distributed generator installations are rapidly increasing and most of the installed systems are interconnected with distribution network. In order to avoid the negative impacts from islanding operations of DR on protection, operation and management of distribution system, it is necessary to effectively detect the islanding operations of DR and rapidly disconnect it from distribution network. Generally, it is difficult to detect islanding operation by monitoring only one system parameter This paper presents a new logic based islanding detection method for distributed resources(DR) which are interconnected with distribution network. The proposed method detects the islanding operation by monitoring four system parameter: voltage variation, phase displacement, frequency variation, and the variation of total harmonic distortion(THD) of current; therefore, it effectively detects island operation of DR unit operating in parallel with the distribution network. We also verified the efficiency of the proposed algorithm using the radial distribution network of IEEE 34 bus model.