• Journal of Ecology and Environment
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• 제45권4호
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• pp.277-286
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• 2021

Background: As trade increases, the influx of various alien species and their spread to new regions are prevalent and no longer a special problem. Anthropogenic activities and climate changes have made the distribution of alien species out of their native range common. As a result, alien species can be easily found anywhere, and they have nothing but only a few differences in intensity. The prevalent distribution of alien species adversely affects the ecosystem, and a strategic management plan must be established to control them effectively. To this end, hot spots and cold spots were analyzed according to the degree of distribution of invasive alien plants, and major environmental factors related to hot spots were found. We analyzed the 10,287 distribution points of 126 species of alien plants collected through the national survey of alien species by the hierarchical model of species communities (HMSC) framework. Results: The explanatory and fourfold cross-validation predictive power of the model were 0.91 and 0.75 as AUC values, respectively. The hot spots of invasive plants were found in the Seoul metropolitan area, Daegu metropolitan city, Chungcheongbuk-do Province, southwest shore, and Jeju island. Generally, the hot spots were found where the higher maximum temperature of summer, precipitation of winter, and road density are observed, but temperature seasonality, annual temperature range, precipitation of the summer, and distance to river and sea were negatively related to the hot spots. According to the model, the functional traits accounted for 55% of the variance explained by the environmental factors. The species with higher specific leaf areas were more found where temperature seasonality was low. Taller species preferred the bigger annual temperature range. The heavier seed mass was only preferred when the max temperature of summer exceeded 29 ℃. Conclusions: In this study, hot spots were places where 2.1 times more alien plants were distributed on average than non-hot spots (33.5 vs 15.7 species). The hot spots of invasive plants were expected to appear in less stressful climate conditions, such as low fluctuation of temperature and precipitation. Also, the disturbance by anthropogenic factors or water flow had positive influences on the hot spots. These results were consistent with the previous reports about the ruderal or competitive strategies of invasive plants instead of the stress-tolerant strategy. The functional traits are closely related to the ecological strategies of plants by shaping the response of species to various environmental filters, and our result confirmed this. Therefore, in order to effectively control alien plants, it is judged that the occurrence of disturbed sites in which alien plants can grow in large quantities is minimized, and the river management of waterfronts is required.

• 대한한의학방제학회지
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• 제30권2호
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• pp.45-57
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• 2022

Objectives : Yukil-san (YIS, 六一散; Liu yi san) is composed of Talcum and Glycyrrhizae Radix, the name is said to be derived from the proportion of the two herbal components of the formula. The YIS originated from 'Formulas from the discussion illuminating the Yellow Emperor's Basic Question'(黃帝素問宣明論方; Huang di su wen xuan ming lun fang) written by Liu Wan-Su (劉完素). YIS could clear summerheat, resolve dampness, and augment the qi. This formula may be used to treat the common cold, influenza, acute gastroenteritis, cystitis, urethritis and bacillary dysentery. But, there is insufficient of study about the effects of YIS on the anti-inflammatory activities. The present study evaluated the anti-inflammatory effects of YIS on lipopolysaccharide (LPS)-activated RAW 264.7 cells. Methods : Cell viability was assessed by MTT assay and nitric oxide (NO) was evaluated by measuring the nitrite content in culture medium. Pro-inflammatory cytokines such as tumor necrosis factor-α, interleukin-1β and IL-6 were quantified by ELISA kit. The expression of proteins related with nuclear factor-κB (NF-κB) pathway and inducible NO synthase (iNOS) were assessed by western blot analysis. Results : YIS significantly inhibited the expression of iNOS increased by LPS, and thus significantly inhibited the production of NO. In addition, YIS significantly inhibited pro-inflammatory cytokines. In the regulation of inflammation, NF-κB pathway plays a crucial role. YIS inhibited the expression of p-IκBα and thus inhibited the translocation of NF-κB to the nucleus. Conclusions : These results suggest that YIS ameliorates inflammatory response in LPS-activated RAW 264.7 cells through the inhibition of inflammatory mediators, via suppression of the NF-κB pathway. Therefore, this study provides objective evidence for the anti-inflammatory effect of YIS including the underlying mechanisms.

• 대한한방부인과학회지
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• 제35권4호
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• pp.91-104
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• 2022

Objectives: This study was performed to review the impact of Coronavirus disease 2019 (COVID-19) infection during pregnancy and the applicability of traditional Chinese medicine (TCM) on COVID-19 infection during pregnancy. Methods: We searched 6 data bases on August, 2022 and articles about the impact of COVID-19 infection during pregnancy, TCM treatment of COVID-19 infection, TCM treatment of pregnancy common cold (姙娠 感冒) or cough (姙娠 咳嗽) were reviewed. Results: COVID-19 infection can bring out negative effects both on pregnant women and fetus. In the case of COVID-19 infection during pregnancy, the symptoms and treatment are similar to those of general COVID-19 infection, but the safety of drug intervention has not been completely verified. Herbal medicine treatment can be applied according to the severity, stage and TCM syndrome types of COVID-19 infection, but the prohibited herbs list during pregnancy and its dosage should be checked carefully. Also, when it comes to pregnancy disease, the effect of "Stabilizing Fetus" should be considered in the perspective of TCM treatment strategy. Glycyrrhizae Radix et Rhizoma, Rhizoma Atractylodis Macrocephalae, Scutellariae Radix have been widely used on COVID-19 infection and the safety of them during pregnancy have been verified. In the case of acupuncture treatment, acupoints also can be selected according to the severity, symptoms, and TCM syndrome types of COVID-19, but acupoints with strong Qi sensitivity or acupoints located in lower abdomen should be avoided during pregnancy. Conclusions: TCM treatment can be applied to COVID-19 infection during pregnancy. Clinical studies and systematic reviews of the efficacy and safety of TCM treatment on COVID-19 infection during pregnancy are required.

• 한국포장학회지
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• 제29권1호
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• pp.27-33
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• 2023

본 연구에서는 저온물류 시스템의 단열용기의 온도유지 성능에 대하여 5℃급 저온 LHM을 배치하였을 때 배치구성 조건에 따른 온도특성을 확인하였다. LHM을 단열용기 내부에 배치하였을 때 6면과 5면에 상/하부 배치 비중에 차이를 두고 외기부하에 따른 내부 공기 온도균일도 및 목표 온도 유지시간을 분석하였다. 단열용기 내부 공기는 상부의 상승온도와 이때 발생하는 밀도차에 의한 공기 대류현상이 온도 성층화를 발생시키고, 균일도를 확보하기 위해 LHM의 상부 배치 비중이 하부보다 컸을 때 균일성이 높고 유지 시간이 오래 지속되는 것을 확인하였다. 다만, 상부 배치 비중을 높이기 위해 하부 배치를 제외한 조건에서 높은 균일성을 보이지만 짧은 유지 시간으로 보여 적정조건으로 알맞지 않다. 결과적으로 단열용기의 단열재 대칭구성과 LHM의 동일한 중량을 배치하여 보냉용기를 제작할 경우, LHM의 전면 배치를 바탕으로 하부에 비해 상부 배치 비중을 늘렸을 때 내부 공기 온도의 분포 균일도와 유지시간 성능을 높이는데 효율적인 방안이라고 판단된다. 저온물류 보냉용기 성능분석에 있어, 본 연구를 기반으로 다른 조건의 상변화 온도와 잠열량을 갖는 다양한 저온영역대의 LHM을 적용한 수치해석을 수행하여 성능 예측 결과를 확보할 수 있고 온도 균일도를 위한 단열 및 잠열 복합 구성 이송 용기의 최적 설계조건 수립에 기여할 것으로 기대된다.

• 대한간호학회지
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• 제3권3호
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• pp.36-49
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• 1973

This study was carried out for the objectives to collect the basic informations on the health behaviors of the elementary school children in an urban area in Korea. Seven hundred students were drawn to fill in the designed questionnaire which carries variety of Questions on health re-lated behaviors in general, eating habits, disease history, mental health, and sex education. Questionnaire were filled in by their parents. Major findings are as follows: ① 55.7% had habits of washing the hands before eating whereas 59.8% trashing their hands after toilet. The others had no idea of washing hands before eating and after toilet. ② 26,5% had habits of brushing the teeth twice a day 54.7% only once in the morning, and 2.6% once only in the evening. Thus, the idea of prevention from decayed teeth seems to be lacking among the school children. ③ Bathing habits were also inquired to get 40.3% of bathing more than once a week, 43.1% once every two weeks, and the rest of 16.6% once every one to three months. ④ 41.7% keep the regular bedding time whereas 58.3% irregular. Physical exercises were con-ducted by 76.6% on the ground while 23.5% did not practice any physical exercises at all. Of those physical exercises, rope skipping occupied 37.5%, and the other 66.9% consisted of 14 different kinds of individual type physical exercises such as gymnastic exercise. The main reasons for not enjoying exercises were different by sex; boys largely complained the inadequacy and lack of gymnastic facilities and girls felt in short of friends who could join the exercises. ⑤ 31.9% of the school children had been taking not much of food while 28.3% had unbalanced diets. Of these unbalanced diets, meat occupied 33.2% to be the priority to have an order of the following items such as vegetables, bread or noodle, and fishes as next to each. For eating habits, 88.5% take simple snack such as bread (38.4%, cookies, fruits, and candies in order. 25.8% of the children were provided such snacks or their parents regularly. Breakfast was sufficiently taken by 45.0% whereas 8.4% had never sufficiently. As to the lunch, 63.6% had sufficiently while 16.8% insufficiently. 70.6% take breakfast with all family members together and 30.4% separately. Correlation of sufficient taking of breakfast and eating together of tile family member's seems to be significant when we compare 72.5% of sufficient takers who enjoy breakfast together with the family members with 55.6% of insufficient takers who enjoy it with the family. This finding allows the investigator to point out the importance of table circumstances for children's eating. ⑥ The most common disease was catching a cold (38.8%), and the second was stomach trouble to be followed by the frequency of car sickness, headache, and skin infection. Doctors are consulted only by 23.9% when they are sick whereas 59.7% resorted to the drug stores. The lower the educational attainment of the parents, the lower the rate of visiting clinics. ⑦ 36.7% of their parents pointed out the problems of personality guidance as the most difficult thing at home 71.3% of their parents worried about and unsatisfied with their children's personality traits. Of these complains of the parents, impatience stood at the top to be tabulated at 24.1%, and 21.1% indicated narrow-mindedness. In line with this primary socialization at home, the most crucial problem seems to be related with the lack or recognition of the parents'own role when we find only 43.1% of the parents understood the importance of their own role for the home education of children; the latter group attributed tile responsibility of personality formation to the children themselves. ⑧ As to the sex educational aspects, 30.9% of children have ever asked about the physiology of reproduction or sexual matters to their parents, of those parents only 17.0% could give the constructive responses to the inquiries of the children. In companies on with these data, 25.6% recognized their own role in sex education for their own children while the large segments of the parents (51.1%) attributed the responsibility of sex education to tile low level of 38.3% who recognized the importance of sex education in the school curriculum and 25.1% of the parents insisted to wait until they get to know naturally about sex. 38.1% of the parents said they had some knowledge on sex from books while 16.9% through mass media. The next groups had common senses of sex from their own parents, school friends and other sources.

• Journal of Preventive Medicine and Public Health
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• 제22권2호
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• pp.290-301
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• 1989

This is preliminary report on anthrax epidemic occurred in an island with about 100 residents. Since 1982 there had been sudden deaths among all kinds of domestic animals including cattle, dogs, ducks, chicken and goat but only a few among cats in an isolated island about three hours distance away by ferry boat from Mokpo city. From 1986 through 1988 nine human deaths and four patients occurred, which made the government intervene for investigation on June 25 1988. The epidemiological investigation consisted of interview survey and medical examination, medical record analysis, laboratory work to isolate the pathogens under the direction of hypothesis derived from the study and further confirmation of the pathogens by international institute. The summarized results are as followings: 1. According to the interview survey there were many deaths among domestic animals usually in cold and dry season such as January through March and September through November; 36 heads of cattle leaving one head, more than 40 hogs(all), hundreds of chicken leaving few alive, goats that had taken home from mountain and two or three cats out of around 40 had sudden deaths from 1982 till 1985, when the residents stopped to purchase and take them into the island anymore. Also there were eleven persons who had experienced the similar syndrome complex to those of admitted and expired patients and four of them revealed typical chest X-ray findings; from one of these four patients(Rho) B. anthracis is isolated. 2. Medical record on patients who had been admitted, showed common characteristics of the disease course. On admission they had either gastrointestinal or upper respiratory infection symptoms which invariably progressed to septicemic nature with pulmonary interstitial infiltration and mediastinal widening/bulging, and then to deadly acute respiratory distress syndrome. At the end stage chest X-ray revealed multiple bullous emphysema. One of another characteristics was oral ulceration with bleeding occurred in about 50% of the patients. Laboratory test results in common were leukocytosis with left shift and abnormal liver and kidney functions, particularly at the later stage of the illness. 3. Epidemiological characteristics was striking in that both mortality and incidence rates were high: the mortality rate was 8.7% average, male being three times higher than females but there was no distictive clustering by age group. The incidence rate for both sexes was 28.2% and there was no sex difference although a tendency of higher incidence among older ages was noticed. The highest mortality and incidence were observed in Won village where the first death of animal occurred and with the highest frequency among three villages of the island. 4. Among twelve bacilli species isolated from various specimens, two strains, one from patient and the other from soil where the recently died cow is hurried, were confirmed as B. anthracis by Pasteur Institute and CDC of USA(strain from soil). CDC reported that the strain did not produce capsule in bicarbonate media but reacted with the bacteriophage and one of five sera taken from the patients. Mode of transmission as well as incubation period of the agent has not been established yet, which needs further investigation in relation to the antigenic structure of the variant when it is confirmed.

• 지능정보연구
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• 제20권4호
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• pp.107-120
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• 2014

본 연구에서는 사회연결망분석기법 중 하나인 구조적 공백 분석 결과를 이용하여 추천과정에 사용자의 정성적이고 감성적인 정보를 반영할 수 있는 협업필터링 기반의 추천시스템을 제안한다. 협업필터링은 추천기술 중 가장 많이 활용되고 있지만 전통적으로 확장성과 희박성 등의 문제점뿐 만 아니라 사용자-상품 매트릭스의 선호도만을 이용하여 추천을 함으로써 사용자의 정성적이고 감성적인 정보를 추천과정에 반영하지 못한다는 한계점이 있다. 본 연구에서 제안하는 추천시스템은 사회연결망분석에서 중심성 분석과 함께 연결망 내의 주요개체를 탐지할 수 있는 구조적 공백 분석을 이용하여 연결망 내의 대표 사용자들을 추출한 후 이들을 중심으로 군집을 형성한 후 각 군집색인 협업필터링을 수행하는 과정을 통해 전통적인 협업필터링에서 반영하지 못했던 정성적, 감성적 정보를 반영한다. 한편, 군집색인 협업필터링을 수행함으로써 추천의 효율성을 높일 수 있는 장점도 있다. 본 연구에서는 실제 사용자들의 상품에 대한 선호도 평가점수와 사용자들의 사회연결망 정보를 수집하여 실험을 수행하고 전통적인 협업필터링과 다양한 형태의 협업필터링과의 추천성과 비교를 통하여 제안하는 시스템의 유용성을 확인한다. 비교모형으로는 전통적인 협업필터링, 임의 군집색인 기반 협업필터링, k평균 군집색인 기반 협업필터링을 이용한 추천시스템이며, 실험 결과, 제안한 모형이 다른 비교모형에 비해 추천성과의 정확도가 가장 우수하였다. 추천성과의 차이에 대한 통계적 유의성 검정 결과, 제안 모형은 전통적인 협업필터링 기반의 추천시스템과는 통계적으로 유의한 성과 차이가 없었으나, 다른 두 모형에 대해서는 통계적으로 유의한 성과의 차이가 있는 것으로 나타났다.

• Clinical and Experimental Pediatrics
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• 제48권9호
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• pp.969-975
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• 2005

목 적 : 소아기 지역 사회 획득 폐렴의 주요 원인인 Mycoplasma pneumoniae 폐렴의 최근 임상 양상의 변화를 알아 소아 폐렴 환아의 치료에 도움을 받고자 하여 본 연구를 시행하였다. 방 법 : 1998년 1월부터 2003년 12월까지 6년 동안 중앙대학교 필동병원 소아과에 입원하여 Mycoplasma 항체치가 1 : 160 이거나, 혹은 추적검사상 4배 이상 증가했던 0-15세 사이의 393 명을 대상으로 하여 이들의 의무 기록을 후향적으로 분석하고 이전의 연구 결과와 비교하였다. 결 과 : 1) 남녀비는 1.06 : 1이었고, 평균연령은 $4.32{\pm}2.94$세였다. 2-3세가 18.6%로 가장 많았으며, 2세 미만에서도 14.7%나 발생했다. 2003년에 가장 많았고, 2000년에 10, 11월, 2002년에 4월, 2003년에는 10, 12월에 많았다. 2) 26.7%에서 알레르기 질환의 과거력이 있었으며 10.7% 환아의 2촌 범위 내에서 알레르기 질환이 있었다. 43.3%가 이전에 폐렴으로 입원하였고, 23.9%에서는 폐렴을 2번 이상 앓았었다. 알레르기 검사를 시행한 환아의 65.7%가 양성이고, 가장 흔한 원인은 집먼지진드기였다. 12.2%에서는 mycoplasma 폐렴이 천식의 유발 혹은 악화인자로 작용했다. 3) 호흡기 증상은 기침, 객담, 순이었고, 폐외증상은 복통, 구토 순이었다. 악설음이 85.4%에서 들렸고, 천명이 18.3%에서 들렸으며, 32.3%에서 청진 소견이 방사선과 일치하였다. 4) 2.5%에서 무기폐, 1.8%에서 흉막삼출이 동반되었다. 기관지 폐렴, 간질성 폐렴, 엽상 음영 순이었고, 우측에 더 많았다. 5) 한랭응집소치와 Mycoplasma 항체치 사이에 유의한 상관성은 없었다. 결 론 : Mycoplasma pneumoniae 폐렴의 호발 연령이 이전 연구결과 보다도 낮아진 것을 알 수 있고, 따라서 학동기 이전의 폐렴 환아들에서 특히 영유아에서도 이에 대한 감별진단을 하는 것이 치료에 도움이 될 것으로 보인다. 또한 천명 동반율이 높아지고, 다른 알레르기 질환의 과거력과 가족력이 있는 경우와, 재발성 폐렴과 연관된 경우가 많았다.

• Pediatric Infection and Vaccine
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• 제6권1호
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• pp.86-92
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• 1999

목 적 : Mycoplasma pneumoniae 폐염은 소아 및 학동기 폐염의 주된 원인이고 영아기 또 는 유아기 호흡감염으로 차차 증가하고 있는 비세균성 폐염으로 경한 침범으로부터 늑막삼 출을 동반한 심한 폐염등의 다양한 양상을 보이는데 흉부방사선 소견과 함께 냉응집소 및 Mycoplasma 항체가의 측정으로 초기에 진단이 가능하다. 저자들은 흉부방사선 소견과 냉응 집소 및 Mycoplasma 항체가의 관계를 중심으로 최근 10년간의 환자의 연도별 분포양상과 폐내 혹은 폐외 합병증 등을 알아보고자 본 연구를 시행하였다. 방 법 : 1986년 7월 1일부터 1996년 6월 30일까지 만 10년간 서울위생병원 소아과에 폐염으로 입원한 2세이상의 환아중 냉응집소 또는 Mycoplasma 항체가 양성으로 보인 환아 및 추적관찰에서 4배이상의 증감을 보인 환아 500명을 대상으로 하였다. 결 과 : 연도별로 1987년 67례(2.8%), 1990년 78례(3.5%), 1993년 121례(3.4%), 1994년에 57 례(2.73%)가 보여 대체로 3년 주기로 호발하였고 뚜렷한 계절적인 차이가 없었으며 연령분포는 2~4세가 217례(43.4%)로 가장 많았고 남녀 비는 1:1로 차이가 없었다. 흉부방사선 소견에서 폐염의 양상은 간질성이 213례(43%)로 가장 많았고 폐염 병소의 위치는 일측성이 417례(83%)였으며 일측성중 우측하엽이 183례(37%)로 가장 많았다. 폐외의 합병증은 간기능 수치의 증가가 109례(21.8%), 현미경적 혈뇨가 16례(3.2%), 단백뇨가 20례(4%), 피부병변이 29례(5.8%)였고, 폐내의 합병증은 무기폐가 11례(2.2%), 폐기종이 5례(1%), 늑막삼출이 27례(5.4%) 보였다. 늑막삼출은 대엽성 및 소엽성 폐염에서 16례(59%)로 가장 많았고 늑막 삼출의 정도는 대개 경미하였으며 삼출액은 전부 장액성이었으며, 냉응집소치에 대한 Mycoplasma 항체검사의 민감도는 53.3%였다. 결 론 : Mycoplasma pneumoniae 폐염은 대체로 3년의 유해주기를 보였고 계절별의 뚜렷한 차이는 보이지 않았다. 연령분포에서 2~4세가 대상환아의 43.4%을 차지하여 M. pneumoniae 폐염이 어린 소아에서 드물다는 일반적인 학설과 상반되는 것으로 향후 그 추이를 관찰을 요하며 간기능 수치가 대상환아의 21.8%로 증가되어 간기능검사등을 포함한 최소한의 검사의 필요성이 있고 냉응집소치와 Mycoplasma 항체가의 상관성이 낮아 향후 중합효소연쇄반응을 이용한 Mycoplasma pneumoniae의 DNA을 측정하는 등 진단의 정밀도를 높이는 방법이 강구되어야겠다.

• 대한가정학회지
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• 제5권1호
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• pp.733-739
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• 1966

A 371 agricultural households from 26 different communities in South Korea was subjected on a study of food taboos in January of 1966. To the pregnant women, those to whom a high protein diet is particurally important, as many as 14 different kinds of foods, mostly portein rich foods, were avoided to eat. It is believed that if duck is eaten while pregnant her baby may walk like a duck in later life. Some mother have a strong aversion to the rabbit meat that her unborn baby must be a harelip. It is feared to eat chicken, shark or carp by the pregnant mother for her baby may get a gooseflesh appearance, or fish scale-like skin in later life. It is thought that if mother eats soup made of meat borns, especially chicken bones, a disfigured baby may be born. Some area informed that if mother eats crab meat her future baby will always bubble. To the child-bearing mothers 13 different kinds of foods were avoided to eat. Some believe that if raddish kimchi, soybean curd, squash are eaten while dilivery that mother may get dental decay or to lose all her teeth. Other think that highly spiced raddish kimchi cause delivery difficult. To the lactating mothers 7 different items of foods were not recommended to eat. It is a common belief that eating green vegetables, especially fresh lettuce, are restricted that her baby may stool greenish. It is said that eating ginsen-chicken soup, or ginsen tea during lactating reduces breast milk secretion. To the weaning babies 7 different kinds of foods were prohibited to fee. Eggs are not eaten because mothers think her babies will start to talk very late. Eight different items of foods in cases of gastro-intestinal diseases, 5 items for liver disease, 7 items for high blood pressure as well as for paralysis were respectively restricted. It is said that meats including pork, beef, and chicken are neither desirable for the patients of high blood pressure nor those of paralysis. To the measles children 10 varieties of foods were restricted. Especially soybean products and meats were not encouraged to use for avoiding asecond attack of measles. For the common cold 8 different kinds of foods were aversed and men think that eating of soup of undria delays a recovery. For the tuberculosis 4 kinds of foods were prohibited to eat. It is said that wine, red pepper and ginsen will stimulate lung bleeding. Many mothers had a strong aversion to fermented shrimp and fish in case of style. and 5 different items of foods were restricted. In case of menstration not so many foods were restricted as other cases, but meat soup is not eaten in this condition in some areas. Majority of food taboos in Korean villages are neither based on tribal nor religious factors. But no one knows how, since what ages, from where, these food taboos have been transmitted and spread over the country. This survey found a great variety of food taboos, aversions, traditional beliefs and prohibitions latent unknown reseasons, or non-scientific conceptions, or completely different ideas from the modern medical aspect, or somewhat fallacious and superstitious beliefs. For the vascular disease contrasting approach were found between modern the oritical therapy and popular remedy among the rural populations who largely depend on the eastern medication. Further scientific study on either side should be done to lead the patient proper way. Many restricted foods such as rabbit, duck, chicken and fish are best resources of protein rich foods which are available in the village. Emphasis should be laid upon breaking down fallacious and supersititious food taboos through the extended nutrition education activities in order to improve food habit and good eating pattern for healthier and stronger generations of Korea.