• 제목/요약/키워드: Military Use

검색결과 948건 처리시간 0.031초

경기도 평택시 팽성읍 마을숲의 식물상 및 식생 (The Vegetation and Flora of Village Groves in Paengseong-eup, Pyongtaek City, Gyonggi-Do, Korea)

  • 안영희;이성제;신경미;박은진
    • 한국환경생태학회지
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    • 제21권6호
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    • pp.515-525
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    • 2007
  • 마을 숲은 지역의 전통적인 공동체 삶을 위해 마을 주변에 조성되어 보호되고 유지되어온 숲이다. 본 연구는 미군부대 이전부지 내에 위치하는 마을 숲을 대상으로 식생 및 식물 상을 조사하였다. 이와 같은 자료는 현지는 물론 인근 지역의 마을 숲 보전 및 복원사업에 필요한 기초자료를 얻을 수 있다. 현지 소산 식물상은 양치식물 2과 2속 1종 1변종으로 총 2분류군으로 나타났으며 나자식물은 2과 2속 3종의 3분류군, 피자식물 중 단 자엽 식물이 5과 10속 11종으로 11분류군, 쌍자엽식물이 24과 39속 40종 3변종으로 43분류군로서 총 33과 53속 55종 4변종의 59분류군으로 조사되었다. 도시화 지수는 4.2%, 귀화율은 20.3%로 타 지역에 비교해 상대적으로 높은 수치를 나타내었다. 마을 숲을 구성하는 식생단위는 소나무군락(Pinus densiflora community), 소나무-졸참나무군락(Pinus densiflora-Quercus serrata community), 졸참나무군락(Quercus serrata community), 찔레군락(Rosa multiflora community)의 4개 군락 단위로 구분되었다. 졸참나무군락은 자연천이에 의해 도태된 소나무 대신 상대적으로 채광적응성이 뛰어난 졸참나무가 우점하는 군락유형으로 교목 층뿐만 아니라 아교목 층에 까지 졸참나무가 생육하고 있는 것으로 조사되었다. 최근 산업화와 더불어 마을 주민들의 이탈과 가구 수의 축소, 도시화에 의해 마을 숲의 이용이 줄어들고 이에 따라 이 지역의 잠재자연식생으로 추정될 수 있는 졸참나무군락으로 소나무-졸참나무군락을 거쳐 천이되는 유형을 보여주고 있었다.

The Survey of Dentists: Updated Knowledge about Basic Life support and Experiences of Dental Emergency in Korea

  • Cho, Kyoung-Ah;Kim, Hyuk;Lee, Brian Seonghwa;Kwon, Woon-Yong;Kim, Mi-Seon;Seo, Kwang-Suk;Kim, Hyun-Jeong
    • 대한치과마취과학회지
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    • 제14권1호
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    • pp.17-27
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    • 2014
  • Background: Various medical emergency situations can occur during dental practices. Cardiac arrest is known to comprise approximately 1% of emergency situation. Thus, it is necessary for dentists to be able to perform cardiopulmonary resuscitation (CPR) to increase the chance of saving patient's life in emergency situation. In this paper, we conducted a survey study to evaluate to what extent dentists actually understood CPR practice and if they had experience in handling emergency situations in practice. Method: The survey was done for members of the Korean Dental Society of Anesthesiology (KDSA), who had great interest in CPR and for whom survey-by-mail was convenient. We had selected 472 members of the KDSA with a dental license and whose office address and contact information were appropriate, and sent them a survey questionnaire by mail asking about the degree of their CPR understanding and if they had experience of handling emergency questions before. Statistical analyses -frequency analysis, chi-square test, ANOVA, and so on- were performed by use of IBM SPSS Statistics 19 for each question. Result: Among 472 people, 181 responded (38.4% response rate). Among the respondents were 134 male and 47 female dentists. Their average age was $40.4{\pm}8.4$. In terms of practice type, there were 123 private practitioners (68.0%), 20 professors (11.0%), 16 dentists-in-service (8.8%), 13 residents (specialist training) (7.2%) and 9 military doctors (5%). There were 125 dentists (69.1%) who were specialists or receiving training to be specialist, most of whom were oral surgeon (57, 31.5%) and pediatric dentists (56, 30.9%). There were 153 people (85.0%) who received CPR training before, and 65 of them (35.9%) were receiving regular training. When asked about the ratio of chest pressure vs mouth-to-mouth respiration when conducting CPR, 107 people (59.1%) answered 30:2. However, only 27.1% of them answered correctly for a question regarding CPR stages, C(Circulation)- A(Airway)- B(Breathing)- D(Defibrillation), which was defined in revised 2010 CPR practice guideline. Dentists who had experience of handling emergency situations in their practice were 119 (65.6%). The kinds of emergency situations they experienced were syncope (68, 37.6%), allergic reactions to local anesthetic (44, 24.3%), hyperventilation (43, 23.8%), seizure (25, 13.8%), hypoglycemia (15, 8.3%), breathing difficulty (14, 7.8%), cardiac arrest (11, 6.1%), airway obstruction (6, 3.3%), intake of foreign material and angina pectoris (4, 2.2%), in order of frequency. Most respondents answered that they handled the situation appropriately under the given emergency situation. In terms of emergency equipment they had blood pressure device (70.2%), pulse oximetry (69.6%), Bag-Valve-Mask (56.9%), emergency medicine (41.4%), intubation kit (29.8%), automated external defibrillator (23.2%), suction kit (19.3%) and 12 people (6.6%) did not have any equipment. In terms of confidence in handling emergency situation, with 1-10 point scale, their response was $4.86{\pm}2.41$ points. The average point of those who received regular training was $5.92{\pm}2.20$, while those who did not was $4.29{\pm}2.29$ points (P<0.001) Conclusion: The result showed they had good knowledge of CPR but the information they had was not up-to-date. Also, they were frequently exposed to the risk of emergency situation during their dental practice but the level of confidence in handling the emergency situation was intermediate. Therefore, regular training of CPR to prepare them for handling emergency situation is deemed necessary.

현대 한국미술과 민족주의란 두 개의 얼굴 (Dual Faces of Nationalism reflected in Contemporary Korean Art and Society)

  • 최태만
    • 미술이론과 현장
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    • 제4호
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    • pp.145-180
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    • 2006
  • In Korea, nation and nationalism are undeniable justice, absolute virtue and moreover system of desire. From the late Chosun Dynasty when the Korean Peninsula had to survive from the critical situation of being the arena of competition, and through the colonial period under Japanese imperialism, nationalism became stronger as a logic of survival. The policy of seclusion under closed and exclusive nationalism that didn't recognize the world situation well enough, eventually gave more pain to the nation. Nationalism in colonial Korea which was as reformed nationalism and on the other hand, as intransigent, resisting nationalism. Since the purpose of this writing is not for clarifying the argument raised on Korean nationalism, there is no use mentioning how it went with the change of time. But we have to focus on the fact that the word 'nation' which appeared under the influence of popular revolution and capitalism meaning 'a group of people', was translated and understood as a racial concept for strengthening the unity of 'single-race nation with five thousand years' history. First of all, there is nationalism used to fortify the system. 'The Charter of National Education' and 'The Pledge of Allegiance' were ornaments to intensify the ruling ideology and dictatorship to militarize entire South Korea for 'settling Korean democracy' professed nationalism. Also, another ruling ideology armed with 'self-reliance' put North Korea into the state of hypnosis called nationalism. Nationalism, claiming 'nation' outwardly, but in reality, being an illuminating, instructing ideology isolating each other was indeed a body with two faces. This made 'nation' in Korea mysterious and objective through work such as. The statue commemorating patriotic forefathers' and picture of national records' in South Korea art. Nationalism used to strengthening the system encountered the magical 'single-race' and made 'ghost' being an extreme exclusion to other nations. We can find pedigreed pureness not allowing any mixed breeds from the attitude accepting western art -via Japan or directly- and making it vague by using the word Korean and Asia. There's nationalism as a resistant ideology to solidify the system on the other side. It came out as a way of survival among the Great Power and grew with the task of national liberation to became as a powerful force facing against the dictatorship dominating South Korea after the liberation. This discussion of nationalism as a resistance ideology was active in 1980s. In 1980, democracy movement against the dictatorship of 5th Republic originated from military power which came out suppressing the democratic movement in Gwangju, spread out from the intellects and the students to the labors, farmers and the civilians. It is well known that the 'Nation-People(Minjoong)'s Art Movement could come out under this social condition. Our attitude toward nationalism is still dual in this opening part of 21st century. On one hand, they are opposing to the ultra-nationalism but are not able to separate it from nationalism, and on the other, they have much confusion using it. In fact, in a single-race nation like Korea, the situation of being nationalism and jus sanguinis together can cause dual nationalism. Though nationalism is included in the globalization order, it is evidence that it's effective in Korea where there are still modern fetters like division and separation. In particular, in the world where Japan makes East Asia Coalition but exposed in front of nationalism, and China not being free from Sinocentrism, and American nationalism taking the world order, and Russia fortifying nationalism suppressing the minority race after the dissolution of socialism, Korean nationalism is at the point to find an alternative plan superior to the ruling and resisting ideology.

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영공(領空)과 우주공간(宇宙空間)의 한계(限界)에 관한 법적(法的) 고찰(考察) ("Legal Study on Boundary between Airspace and Outer Space")

  • 최완식
    • 항공우주정책ㆍ법학회지
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    • 제2권
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    • pp.31-67
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    • 1990
  • One of the first issues which arose in the evolution of air law was the determination of the vertical limits of airspace over private property. In 1959 the UN in its Ad Hoc Committee on the Peaceful Uses of Outer Space, started to give attention to the question of the meaning of the term "outer space". Discussions in the United Nations regarding the delimitation issue were often divided between those in favour of a functional approach ("functionalists"), and those seeking the delineation of a boundary ("spatialists"). The functionalists, backed initially by both major space powers, which viewed any boundary as possibly restricting their access to space(Whether for peaceful or military purposes), won the first rounds, starting with the 1959 Report of the Ad Hoc Committee on the Peaceful Uses of Outer Space which did not consider that the topic called for priority consideration. In 1966, however, the spatialists, were able to place the issue on the agenda of the Outer Sapce Committee pursuant to Resolution 2222 (xxx1). However, the spatialists were not able to present a common position since there existed a variety of propositions for delineation of a boundary. Over the years, the funtionalists have seemed to be losing ground. As the element of location is a decisive factor for the choice of the legal regime to be applied, a purely functional approach to the regulation of activities in the space above the Earth does not offer a solution. It is therefore to be welcomed that there is clear evidence of a growing recognition of the defect inherent to such an approach and that a spatial approach to the problem is gaining support both by a growing number of States as well as by publicists. The search for a solution of the problem of demarcating the two different legal regimes governing the space above the Earth has undoubtedly been facilitated, and a number of countries, among them Argentina, Belgium, France, Italy and Mexico have already advocated the acceptance of the lower boundary of outer space at a height of 100km. The adoption of the principle of sovereignty at that height does not mean that States would not be allowed to take protective measures against space activities above that height which constitute a threat to their security. A parallel can be drawn with the defence of the State's security on the high seas. Measures taken by States in their own protection on the high seas outside the territorial waters-provided that they are proportionate to the danger-are not considered to infringe the principle of international law. The most important issue in this context relates to the problem of a right of passage for space craft through foreign air space in order to reach outer space. In the reports to former ILA Conferences an explanation was given of the reasons why no customary rule of freedom of passage for aircraft through foreign territorial air space could as yet be said to exist. It was suggested, however, that though the essential elements for the creation of a rule of customary international law allowing such passage were still lacking, developments apperaed to point to a steady growth of a feeling of necessity for such a rule. A definite treaty solution of the demarcation problem would require further study which should be carried out by the UN Outer Space Committee in close co-operation with other interested international organizations, including ICAO. If a limit between air space and outer space were established, air space would automatically come under the regime of the Chicago Convention alone. The use of the word "recognize" in Art. I of chicago convention is an acknowledgement of sovereignty over airspace existing as a general principle of law, the binding force of which exists independently of the Convention. Further it is important to note that the Aricle recognizes this sovereignty, as existing for every state, holding it immaterial whether the state is or is not a contracting state. The functional criteria having been created by reference to either the nature of activity or the nature of the space object, the next hurdle would be to provide methods of verification. With regard to the question of international verification the establishment of an International Satelite Monitoring Agency is required. The path towards the successful delimitation of outer space from territorial space is doubtless narrow and stony but the establishment of a precise legal framework, consonant with the basic principles of international law, for the future activities of states in outer space will, it is still believed, remove a source of potentially dangerous conflicts between states, and furthermore afford some safeguard of the rights and interests of non-space powers which otherwise are likely to be eroded by incipient customs based on at present almost complete freedom of action of the space powers.

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금연법 강화가 흡연에 미치는 영향 (The Impacts of Smoking Bans on Smoking in Korea)

  • 김범수;김아람
    • KDI Journal of Economic Policy
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    • 제31권2호
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    • pp.127-153
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    • 2009
  • 국내외적으로 간접흡연이나 환경 속 담배연기가 미칠 수 있는 해악에 대한 관심이 고조되고 있으며, 그 결과 작업공간 내 금연정책이 점차 늘어나고 있다. 한국에서도 작업공간 내 금연정책이 2003년 국민건강증진법 개정으로 훨씬 강화되었다. 본 논문에서는 2001년과 2005년에 이루어진 국민건강영양조사를 이용하여 강화된 금연정책이 흡연율과 일평균 흡연 개비 수에 미친 영향을 분석하고자 한다. 금연법강화가 실내 작업공간 위주로 이루어진 점에 착안하여 법 개정의 영향을 많이 받은 실내근무자 직업군과 영향을 비교적 덜 받는 실외근무자 직업군을 비교하였다. 추정 결과, 금연법 강화로 95% 수준에서 유의하게 흡연율은 4.1%p 감소하였고, 흡연자 중 일평균 흡연 개비는 2.5개비 줄어든 것으로 나타났다.

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지지간호가 군 요통환자의 우울ㆍ기분ㆍ만족에 미치는 영향 (The Effect of Supportive Nursing Care on Depression, Mood and Satisfaction in Military Patients with Low Back Pain)

  • 김정아
    • 대한간호학회지
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    • 제20권3호
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    • pp.324-340
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    • 1990
  • Support has always been considered an important nursing concept. However, there is no agreement among nurse researchers as to a conceptual definition of supportive nursing or meaningful supportive behaviors. Clarification of the concept, support in nursing, is necessary to promote communication among nurses on nursing behaviors that are effective in providing support and on understanding the relevant properties and charcteristics of the concept, supportive nursing care. The objectives of the study were : 1. to analyse the concept, support in nursing, in order to provide a definition of supportive nursing care, and 2. to operationalize the definition of supportive nursing care and use it as an experimental nursing intervention for patients with low back pain. The first part of the study used the concept analysis approach developed by Walker and Avant(1983) to define the concept of supportive nursing care. The properties of supportive nursing care, defined by this analysis, included perception of supportive need, reciprocal interaction(Transaction), listening, providing empathy and information related to health, and confirmation of the patient's verbal and non - verbal response. The second part, the experimental part of the study, was done using King's(1970) Interpersonal Theory for Nursing. The concept, supportive nursing care, as defined in the concept analysis was operationalized and used as the experimental intervention. The experiment tested the effectiveness of the independent variable, supportive nursing care on the dependent variables, depression, mood and patient satisfaction, in the patients with low back pain in army hospitals. The instruments used to measure the dependent variables were Zung's(1965) Self- Rating Depression Scale, Ryman and Colleagues'(1974) Mood Questionnaire and LaMonica and Colleagues'(1986) Patient Satisfaction Scale. The experimental design used for this study was a Solomon 4 group experimental design. This design has the strength of allowing for observation of the main effects of supportive nursing care and pretesting, and for observation of the interaction effects of pretesting and supportive nursing care. The design includes one experimental group and three control groups. The Subjects of this study were 150 young male patients with low back pain on Neuro - Surgical Wards in three general army hospitals. There were 35 in the experimental group, 39 in the pre - posttest control group, 36 in the treatment - posttest control group and 40 in the posttest only control group. Supportive nursing care, as operationalized by the researcher according to the concept analysis, was given to the patients in the experimental group and the treatment -posttest control group, individually for 30 minute sessions, every other day for 5 days. Data collection was done using a questionnaire. The data were collected in a pretest one week before the supportive nursing care sessions, a posttest immediately after the sessions and follow- up test one week later. Hypotheses testing was done using 2×2 factorial analysis of variance and Meta analysis(Stouffer's Z method). The results of this study are summarized as follows : 1. Hypothesis Ⅰ, “There will be a difference on depression level between the patients with low back pain who receive supportive nursing care and those who do not receive supportive nursing care”, was supported (F=8.49, p<.05). 2. Hypothesis Ⅱ, “There will be a difference on mood level between the patients with low back pain who receive supportive nursing care and those who to not receive supportive nursing care”, was supported (Z meta=2.17, p<.05). 3. Hypothesis Ⅲ, “There will be a difference on satisfaction level between the patients with low back pain who receive supportive nursing care and those who do not receive supportive nursing care”, was supported (F=13.67, p<.05). 4. ANOVA, done to examine the interaction effect of history and maturation, showed no significant difference on the dependent variables between the observations of the pretest scores of the experimental group, the pretest scores of the pre- posttest control group and the posttest score of the posttest only control group. 5. To test for continuing effect of supportive nursing care, paired t-test was done to compare the scores for the dependent variables at the posttest and at the one week later follow-up test. No significant difference on the scores for the dependent variables was found between the posttest scores and the follow-up test scores for the two groups that received supportive nursing care, the experimental group and the treatment-posttest control group. In conclusion, it was found that in the case of young soldiers with low back pain in army hospitals, their depression level was decreased, their mood state was changed positively and their satisfaction level was increased by receiving supportive nursing care. Further, the effectiveness of the supportive nursing care lasted for at least one week in this study. The significance of this study to nursing is in the analysis of the concept of supportive nursing care and the demonstration of the effectiveness of supportive nursing care as an intervention within the limits of the study.

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A Study on Relationship between Physical Elements and Tennis/Golf Elbow

  • Choi, Jungmin;Park, Jungwoo;Kim, Hyunseung
    • 대한인간공학회지
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    • 제36권3호
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    • pp.183-196
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    • 2017
  • Objective: The purpose of this research was to assess the agreement between job physical risk factor analysis by ergonomists using ergonomic methods and physical examinations made by occupational physicians on the presence of musculoskeletal disorders of the upper extremities. Background: Ergonomics is the systematic application of principles concerned with the design of devices and working conditions for enhancing human capabilities and optimizing working and living conditions. Proper ergonomic design is necessary to prevent injuries and physical and emotional stress. The major types of ergonomic injuries and incidents are cumulative trauma disorders (CTDs), acute strains, sprains, and system failures. Minimization of use of excessive force and awkward postures can help to prevent such injuries Method: Initial data were collected as part of a larger study by the University of Utah Ergonomics and Safety program field data collection teams and medical data collection teams from the Rocky Mountain Center for Occupational and Environmental Health (RMCOEH). Subjects included 173 male and female workers, 83 at Beehive Clothing (a clothing plant), 74 at Autoliv (a plant making air bags for vehicles), and 16 at Deseret Meat (a meat-processing plant). Posture and effort levels were analyzed using a software program developed at the University of Utah (Utah Ergonomic Analysis Tool). The Ergonomic Epicondylitis Model (EEM) was developed to assess the risk of epicondylitis from observable job physical factors. The model considers five job risk factors: (1) intensity of exertion, (2) forearm rotation, (3) wrist posture, (4) elbow compression, and (5) speed of work. Qualitative ratings of these physical factors were determined during video analysis. Personal variables were also investigated to study their relationship with epicondylitis. Logistic regression models were used to determine the association between risk factors and symptoms of epicondyle pain. Results: Results of this study indicate that gender, smoking status, and BMI do have an effect on the risk of epicondylitis but there is not a statistically significant relationship between EEM and epicondylitis. Conclusion: This research studied the relationship between an Ergonomic Epicondylitis Model (EEM) and the occurrence of epicondylitis. The model was not predictive for epicondylitis. However, it is clear that epicondylitis was associated with some individual risk factors such as smoking status, gender, and BMI. Based on the results, future research may discover risk factors that seem to increase the risk of epicondylitis. Application: Although this research used a combination of questionnaire, ergonomic job analysis, and medical job analysis to specifically verify risk factors related to epicondylitis, there are limitations. This research did not have a very large sample size because only 173 subjects were available for this study. Also, it was conducted in only 3 facilities, a plant making air bags for vehicles, a meat-processing plant, and a clothing plant in Utah. If working conditions in other kinds of facilities are considered, results may improve. Therefore, future research should perform analysis with additional subjects in different kinds of facilities. Repetition and duration of a task were not considered as risk factors in this research. These two factors could be associated with epicondylitis so it could be important to include these factors in future research. Psychosocial data and workplace conditions (e.g., low temperature) were also noted during data collection, and could be used to further study the prevalence of epicondylitis. Univariate analysis methods could be used for each variable of EEM. This research was performed using multivariate analysis. Therefore, it was difficult to recognize the different effect of each variable. Basically, the difference between univariate and multivariate analysis is that univariate analysis deals with one predictor variable at a time, whereas multivariate analysis deals with multiple predictor variables combined in a predetermined manner. The univariate analysis could show how each variable is associated with epicondyle pain. This may allow more appropriate weighting factors to be determined and therefore improve the performance of the EEM.

다차원 안보위협과 융합 안보 (Multi-dimensional Security Threats and Holistic Security - Understanding of fusion-phenomenon of national security and criminal justice in post-modern society -)

  • 윤민우;김은영
    • 시큐리티연구
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    • 제31호
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    • pp.157-185
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    • 2012
  • 오늘날 사이버 공간의 도래와 일상화라는 증강 현실의 확대, 그리고 세계화로 인한 인간과 물품, 그리고 문화의 빠른 이동 등의 결과는 우리가 생산을 하고 경제활동을 하고 문화생활을 하는 일상의 혁명적인 변환뿐만 아니라 우리가 상대방을 공격하고 파괴하는 범죄나 전쟁 등의 폭력 사용에서의 혁명적인 변환을 가져왔다. 그리고 이러한 환경 조건의 변화는 개인적인 차원에서 지역적 차원, 그리고 국가적 차원과 지구적 차원에 걸쳐 다른 차원에서 각각 존재해 왔던 여러 다양한 차원의 안보 또는 치안의 위협들을 서로 결합시킴으로서 이러한 여러 다른 차원의 안보 또는 치안의 위협들을 다차원 안보위협의 총합이라는 형태로 오늘날 우리의 삶과 개개인의 안전과 국가적 단위에 심각한 위협이 되도록 조건지우고 있다. 이 논문은 이러한 다차원 안보위협의 총합이 서로 얽혀 있으며 각각의 개별 안보 위협들의 총합을 함께 바라보는 통합적 시각을 가질 때 문제의 근원적 실체를 제대로 이해할 수 있고 우리가 직면하고 있는 공포의 실체를 정확히 파악할 수 있음을 보여주고자 한다. 이 글에서 제시하는 개념인 융합안보라는 개념은 다차원 안보위협의 총합에 대한 통합적 네트워크적 응전의 방식을 개념적으로 제시한 것이다. 융합안보는 기존의 국가안보와 치안이라는 분절적 시각을 극복하고 국가안보와 치안을 통합적으로 인식하고 정보기관, 군, 경찰, 검찰, 소방, 민간 경비 등의 각 영역들의 경계를 넘어 통합적으로 접근함으로서 오늘날 다차원 안보위협이 던지고 있는 도전들에 대한 응전의 방식들을 만들어 가고자하는 개념적 노력이다. 그와 함께 이 논문은 융합안보와 관련하여 해외의 주요 국제기구와 국가들에서 시도되고 있는 통합적 네트워크적 대응 방안들에 대해서도 소개하고자 한다. 글쓴이는 지난 10년간 미국, 러시아, 이스라엘, 우즈베키스탄, 오스트리아, 캐나다, 멕시코, 독일 등지를 돌면서 관찰하였던 사항들과 여러 교육, 훈련과 세미나, 콘퍼런스, 그리고 개인적 접촉 등의 기회를 통해 가졌던 여러 관련 전문가들과의 인터뷰 등의 내용을 종합하여 유엔 등 국제기구와 세계의 여러 주요 국가들에서 시도되어오고 있는 오늘날의 보다 복잡한 안보위협들에 대한 융합적 대응방안들, 즉 기관의 네트워크적 협력, 데이터베이스의 구축 및 교류 등 을 소개할 것이다.

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HPLC-FLD와 MSD를 이용한 지하수 중 나프탈렌 및 TNT의 미량 분석법 개발 (Development of Analytical Methods for Micro Levels of Naphthalene and TNT in Groundwater by HPLC-FLD and MSD)

  • 박종성;오재일;정상조;최윤대;허남국
    • 한국지하수토양환경학회지:지하수토양환경
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    • 제14권6호
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    • pp.35-44
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    • 2009
  • 나프탈렌과 TNT는 미국 환경청(U.S. EPA)에서 규정한 발암가능성 물질로(Group C), 환경으로 방출될 경우 수생태계와 인체에 심각한 영향을 주는 것으로 알려져 있다. 그러나 지하수 내 두 물질의 미량 분석법에 대한 기존연구는 매우 미비한 실정이다. 이에 본 연구에서는 HPLC-FLD(Fluorescence etector)와 MSD(Mass detector)를 이용한 지하수 내 나프탈렌 및 TNT의 미량분석법을 개발하여, MDL과 LOQ 및 이온영향을 조사하고, 현재 사용되고 있는 HPLC-UV 분석법과 비교 평가하였다. 나프탈렌의 경우, 3D-Fluorescence를 통하여 확인된 최고의 파장(Ex: 270 nM, Em: 330 nM)이 HPLC-FLD에 적용되었고, $0.3\;{\mu}g/L$의 MDL과 $2.0\;{\mu}g/L$의 LOQ가 획득되었다. 이는 현재 방법(HPLC-UV; MDL: $23.3\;{\mu}g/L$, LOQ: $163.1\;{\mu}g/L$)보다 약 80배 우수한 결과이며, U.S. EPA의 음용수 권고기준($700\;{\mu}g/L$)의 약 350배 이하까지 정량분석이 가능한 수치이다. TNT의 경우, 새롭게 제시된 HPLC-MSD로 측정한 방법(MDL: $0.13\;{\mu}g/L$, LOQ: $0.88\;{\mu}g/L$)이 HPLC-UV(MDL: $16.8\;{\mu}g/L$, LOQ: $117.5\;{\mu}g/L$ at 230 nM)보다 약 130 배 우수한 것으로 조사되었고, U.S. EPA의 음용수 권고기준($20\;{\mu}g/L$)보다 약 23배 낮은 농도까지 정량분석이 가능한 것을 확인하였다. 또한 HPLC-UV(230 nM)의 분석법은 ${NO_3}^-$ 농도가 증가할수록(특히 21 mg/L 이상) 크로마토그램의 기준선이 증가하여 정량에 방해를 주었으나, HPLC-MSD 분석법은 국내 지하수 평균 농도보다 약 3.5배인 63.7 mg/L에서도 분석의 영향 없이 안정한 크로마토그램을 보여주었다. 따라서 새롭게 제시된 HPLC-FLD와 MSD에의한 나프탈렌과 TNT 분석법은 지하수 및 음용수 미량분석에 적합하며, 관련분야 연구에 크게 도움이 될 것이다.

해방 이후 우리나라 면작농업 소멸의 지역적 전개과정 (A study on the process of spatial reduction of cotton culture in Korea since 1945)

  • 김기혁
    • 대한지리학회지
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    • 제29권3호
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    • pp.318-339
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    • 1994
  • 본 연구는 우리나라에서 거의 소멸된 면화재배의 지역적인 축소 과정을 확인하고, 현재 농촌에서 이루어지는 면화재배의 의미를 파악하였다. 해방 이후 우리나라의 면방직 공 업은 원면도입으로 해외 원료 의존형 산업이 되었다. 환율정책으로 국내면 가격이 미국산 원조면보다 비싸지고, 정부의 식량증산 위주의 농업정책, 유통구조 등으로 인해 국내면의 재 배면적이 감소되기 시작하였다. 국내 면 재배 면적 감소의 지역적인 과정은 일차적으로 기 후조건이 면화재배에 불리한 지역에서 먼저 나타나 식량 밭작물로 대체되었고, 이후 재배 유인력이 더욱 약해짐에 따라 재배 발원지를 제외한 다른 지역에서는 거의 소멸되고 있었 다. 현재 농촌에서 면화는 이불솜 을 위한 자가 소비용, 식용, 약용외에 다른 작물의 생산성 을 높이기 위한 부작물로서 재배되고 있음이 확인되었다. 재배방법은 종래와 큰 차이가 없 이 행해지고 있었으며 노동집약적으로 생산되고 있다. 농민의 면화에 대한 애착이 강하고, 국내면으로 만든 이불솜을 선호하는 소비자들의 수요가 아직 있음이 확인되어, 정부의 정책 적인 배려와 함께 시장이 확보될 경우 국내면이 앞으로도 재배될 수 있는 가능성을 보여주 고 있었다.

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