오인으로 인해 집단으로 발생한 자리공 중독

진우제,진영호,정태오,이재백,Jin Woo-Je,Jin Youngho,Jeong Tae-O,Lee Jae- Baek 대한임상독성학회 2004 대한임상독성학회지 Vol.2 No.1

Phytolaccaceae had been used as a pharmaceutical drugs or food in Korea. Nowadays, it is rarely used due to its toxicity, and then, case reports as to poisoning also are rare. Recently, Authors experienced a case of an occurrence in a group intoxication after ingestion of roots of phytolacca american a misidentifying as arrowroot. We report this case with review of phytolacca radix poisoning.

원전의 안전계통 설정치 불확도 평가에서의 중심극한정리 타당성 확인

이재용(Jaeyong Lee),주운표(Oonpyo Zhu),진영호(Youngho Jin) 표준인증안전학회 2024 표준인증안전학회지 Vol.14 No.1

원자력발전소 안전계통 설정치의 불확도 평가에서 각 요소들의 불확도 합성시에 흔히 중심극한정리(CLT)를 활용한다. 그러나 개별 입력량의 분포 특성과 합성하려는 입력량의 갯수에 따라서 중심극한정리를 적용할 수 없는 경우도 있다. 이를 반영하기 위해서 국제표준이 개정 중에 있다. 본 논문에서는 안전계통 설정치를 산출하는 여러가지 방법론을 기술하고, 여기에 쓰이는 개별 입력량의 분포특성에 따라 합계구성 요소가 중심극한정리를 따르는 지를 확인하였다. 이를 확인하기 위한 기본 도구로는 Monte Carlo 시뮬레이션 방법을 이용하였으며, 파이썬 프로그램 라이브러리인 KS test를 이용하여 정규성을 검증하였다. 또한 각 분포들의 분산 특성을 살펴 일양분포(uniform)와의 차이점을 분석하였다. 분석결과 합계구성 요소가 중심극한정리를 따르려면 일양분포에 비하여 분포가 양측으로 몰려 있는 경우에는 네 개 이상의 입력량 수가 필요하였다. 즉, 안전계통 설정치의 요소 불확도 입력량의 갯수가 4 이상인 경우에는 요소 불확도의 분포에 관계없이 합성 불확도는 정규성을 가진다고 평가되었다. 그러므로 CLT를 적용하여 포함인자를 얻은 다음 이를 이용하여 합성불확도를 구하는 방법이 타당함을 확인하였다. 일양분포에 비해 중심 쪽에 몰려 있는 분포의 경우에는 입력량의 수가 3 이하여도 만족하였다. 무선통신의 불확도 평가에 이용되는 U형 분포의 경우 역삼각분포보다는 일양분포에 가까운 특성을 보였다. 또한 분산의 경우에는 일양분포의 분산이 선형분포의 분산에 비해 크다는 것을 알 수 있어서 이는 최대 엔트로피 원칙에 부합됨을 확인하였다. In evaluating the uncertainty of nuclear power plant safety system setpoints, the central limit theorem(CLT) is often used when combining the uncertainties of each element. However, depending on the distribution characteristics of individual elements and the number of elements to be combined, there are cases where the central limit theorem cannot be applied. International standards are being revised to reflect this. In this paper, we describe various methodologies for calculating safety system setpoints and confirm whether the combined components follow the central limit theorem according to the distribution characteristics of the individual elements. The Monte Carlo simulation method is used as a basic tool to confirm this, and normality is verified using KS test in Python program library. Additionally, the variance characteristics of each distribution are examined and differences from the uniform distribution are analyzed. As a result of the analysis, in order for the combined component to follow the central limit theorem, if the distribution is concentrated on both sides compared to the uniform distribution, the number of input variables needs to be four or more. That is, when the number of input element uncertainty of the safety system setpoint exceeds 4, the combined uncertainty was evaluated to have normality regardless of the distribution of input element uncertainty. Therefore, it was confirmed that the method of applying CLT to calculate the coverage factor and then using it to obtain the expanded uncertainty was valid. In the case of a distribution concentrated toward the center compared to a uniform distribution, the number of variables less than 3 was required. The U type distribution, which is used to evaluate the uncertainty of wireless communication, showed characteristics closer to a uniform distribution than an inverted triangular distribution. Also, in the case of variance, it was found that the variance of the uniform distribution was larger than that of the linear distribution, confirming that this conformed to the maximum entropy principle.

기능성화 산화 그래핀과 폴리인산암모늄을 이용한 직물 난연성 향상

가동원 ( Dongwon Ka ),장성온 ( Seongon Jang ),정현숙 ( Hyunsook Jung ),진영호 ( Youngho Jin ) 한국복합재료학회 2020 Composites research Vol.33 No.4

난연 의류는 화염 및 고온 환경 속에서 착용자의 원활한 임무 수행을 돕고 추가적인 피해 확산을 방지한다. 그러나 기존 난연 의류의 높은 중량과 열 피로도는 개선이 필요하며, 친환경적인 방법으로 제작된 가볍고 편리한 난연 의류 개발이 요구되고 있다. 최근 인을 함유한 난연 물질 코팅으로 섬유에 난연성을 부여한 사례가 보고되고 있으나 이들은 국내외 방화복 및 난연 전투복 기준에 적합한 수준으로 발전될 필요성이 있다. 본 연구에서는 깊은 용융 용매로 기능성화된 산화 그래핀과 폴리인산암모늄을 동시에 섬유에 코팅하는 친환경적인 대량생산 공정을 제시한다. 코팅된 섬유는 열무게 분석(Thermogravimetric analysis), 수직불꽃저항성 시험(ASTM D6413), 콘칼로리미터법(ISO 5660-1), 한계 불꽃 확신 속도 시험(ISO 15025)으로 열 안정성 및 난연성이 시험되었다. 기능성화 산화그래핀과 폴리인산암모늄이 동시에 코팅된 직물은 단일 물질 코팅 직물보다 우수한 난연성을 보였고, 연소 이후에도 탄화된 부분의 팽창 효과로 섬유의 형상을 유지하는 것이 관찰되었다. 난연 직물의 세탁 안정성을 위해 추가적인 발수 처리 또한 시도되었다. Flame retardant(FR) clothes prohibit additional fire diffusion and make the personnel do their tasks without a hitch in a flammable environment. The existing FR clothes, however, are heavy and give high thermal fatigue. Therefore, it is strongly demanded to develop a light, convenient, and eco-friendly clothes. Recently, many works have been reported to make FR fabrics with phosphorus compounds, but their performance could not satisfy the specified criteria in appraisal standards of domestic and American FR clothes or combat uniforms. In this paper, two kinds of phosphorus compounds were applied to cotton fabric. Graphene oxide functionalized with a phosphorusrich deep eutectic solvent and ammonium polyphosphate were coated on cotton fabric by eco-friendly padding procedure. The coated fabrics were analyzed with thermogravimetric analysis, vertical flame resistance test(ASTM D6413), cone calorimeter test(ISO 5660-1), and method of test for limited flame spread(ISO 15025). It was revealed that the as-made cotton with those two materials simultaneously had better flame resistance than the cottons with each one. Furthermore, an additional coating for hydrophobicity on the FR cotton was tried for better washing fastness.

유아의 기본 심폐소생술 중 구조호흡 방법의 재고

진영호,이재백,김범주 대한응급의학회 2000 대한응급의학회지 Vol.11 No.1

Background. The current recommendation of rescue breathing techniques in the infant is to blow both the nose and mouth of infants by caregiver's mouth but recent studies suggest some caregivers may have trouble sealing a infant's mouth and nose. The purpose of this study is to estimate the ability of mothers to create a seal to their infants for the provision of rescue breathing according to current recommendation. Methods. Infants up to 1 year of age(n=98) and their mothers were enrolled from emergency department of Chonbuk National University Hospital. We measured the facial lengths of the infants and the width of mouth in their mothers and compared mouth widths of mothers with their infant's nose-to-mouth lengths. Results. In infants between 0 to 6 months, Mother transverse lengths were significantly larger than mouth, nose and nose-to-mouth lengths of the infants. In infants between 7 to 12 months, Mother transverse lengths were significantly larger than mouth and nose lengths of the infants but there was no statistically significant difference between mother transverse lengths and nose-to-mouth lengths of infants. Conclusion. The finding indicate that the present recommendation to cover mouth and nose is partly not possible. We recommend that the mouth-to-nose ventilation of rescue breathing techniques for the infants who have respiratory arrest be taught to mothers.

금속 연무열

이동익,진영호,이재백 대한응급의학회 2002 대한응급의학회지 Vol.13 No.2

Metal fume fever is a relatively uncommon presentation at the emergency department. It is an acute self-limited illness induced most commonly by inhalation of zinc-oxide fumes. However, it is often misdiagnosed as a viral illness because its symptoms resemble a number of pulmonary illnesses. We report the case of a 37-year-old male presenting with metal fume fever. The literature is reviewed with respect to the toxicopathophysiology, clinical presenting symptom complex, and emergency department management of metal fume fever.

초오가 포함된 단방약에 의한 Aconitine 중독

최도일,진영호,이재백 대한응급의학회 2002 대한응급의학회지 Vol.13 No.2

Purpose: Preparations of Aconitum roots in Chinese and Korean medicine are carefully prescribe for analgesic, antirheumatic and neurologic indications. However, in Korean folk medicine, a crude medical herb prepared from Aconitum is still used as form of a decoction or an unrefined tablet. Potential hazards of these medicinal herbs are poisoning and occasional fatalities due to low margins of safety. This study was conducted to document the adverse effects related to the use of these folk recipes that resulted in the emergency department(ED) admission. Methods: A retrospective survey was conducted of 30 patients presented to the ED of a tertiary University Hospital with suspected adverse effects from folk recipes containing Acontium over a three-year period from 1999 to 2001. The patients was analyzed according to sex, age, intention of use, residential area, vital signs on ED presentation, time to prsentation, time to discharge or ECG normalization, frequency of chief complaints, and ECG abnomalities. Results: The patients mean age was around 67 years old. The patients were predominantly female (22 patients) and from rural areas (21 patients). The drug effects of Aconitum were not appreciated by almost all the patients. Of the chief complaints, nausea or vomiting was most common (76.7%). Time to presentation in the ED varied (30∼930 minutes), which suggests that the occurrence of symptoms is directly related to the amount of aconitine in folk recipes containing Aconitum. Upon the arrival, most of the patients were hypotensive (MVP: 62 mmHg), but heart rates were normal or tachycardic. The ECG findings were variable, and, except for one case, normal sinus rhythm was restored within 24 hours without pharmacological intervention. Conclusion: This research demonstrates the need to emphasize public announcement to deter the injudicious use of folk recipes containing Aconitum species.