• 한국산림과학회지
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• 제55권1호
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• pp.55-58
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• 1982

본 연구(硏究)는 잣나무림(林)의 일차(一次) 생산력(生産力)을 알기위한 것으로, 엽(葉)의 온도(溫度) 광도(光度) 수분결핍(水分缺乏) 등이 광합성속도(光合成速度)및 호흡속도(呼吸速度)에 미치는 영향(影響)을 측정(測定) 보고(報告)한다. 1) 광포화(光飽和)는 40Klwx 전후에서 일어나며 광보상점(光補償点)은 l.0~1.3Klwx 임을 알았다. 2) 당년엽(當年葉)의 광합성(光合成) 속도(速度)가 가장 높고 엽령(葉令)이 증가함에 따라 감소(減少)했다. 3) 온도반응(溫度反應)에 따른 호흡속도(呼吸速度)는 2월엽(月葉)이 8월엽(月葉)보다 2배(倍)정도 높았고, 양자(兩者) 모두 $17^{\circ}C$ 이하에서 심한 감소(減少)를 보였다. 4) 광합성(光合成) 속도(速度)는 약 -10bar에서 감소(減少)가 시작되며 약 -24bar에서 0으로 되었다. 호흡속도(呼吸速度)는 약 -5 bar에서 감소(減少)가 시작 -24bar에서 43% 정도 감소했다. 5) 광합성(光合成)에 관한 최적온도(最適溫度)는 8월 엽(葉)에서 $23{\sim}26^{\circ}C$, 2월엽(月葉)에서 $15{\sim}18^{\circ}C$를 나타냈다.

• Journal of Chest Surgery
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• 제16권2호
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• pp.213-220
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• 1983

Pulmonary function is the determinant of blood gas tension. However, Acid-Base disturbances can also alter partial pressures of oxygen and carbon dioxide in arterial blood. During respiratory acidosis $PO_2$ will be lowered and reverse changes will be produced during respiratory alkalosis. On the other hand, in metabolic acidosis $PO_2$ will be elevated and $PCO_2$ will be lowered by the respiratory compensation, and reverse response will be induced in metabolic alkalosis. Urinary gas tension has many influencing factors than arterial blood and difficult to estimate the tendency of its alterations. Urinary $PO_2$ and $PCO_2$ are not always identical level as venous blood. It is to be altered by blood gas tension, flow rate of urine, metabolic rate of kidney, and Acid-Base status of blood. Particularly countercurrent exchange of oxygen and carbon dioxide in the renal medulla will make larger alteration of gas tension than venous blood. After induction of Acid-Base disturbances [disturbances] arterial and urinary $PCO_2$, $PO_2$, urinary volume, and osmolarity were determined in dogs, and the relationships between arterial and urinary $PCO_2$ , $PO_2$ Acid-Base disturbances, urinary volume, and osmolarity were investigated. 1. During the acute Metabolic and Respiratory disturbances urinary pH did not respond on respiratory origin. However, there were immediate urinary response in pH on metabolic origin. 2. Urinary $PO_2$, $PCO_2$, did not always follow arterial or venous gas tension and Acid-Base disturbance. Urinary $PCO_2$, correlate well with the urinary volume. The larger the urinary volume, $PCO_2$ lowered to the venous level. The smaller the urinary volume, urinary $PCO_2$ tends to be higher. However urinary $PO_2$ did not have any particular correlation with urinary volume. 3. Correlation between urinary $PCO_2$ and $PO_2$ were inversely proportional to arterial blood. Differences of $PCO_2$ between arterial blood and urine also did not have any particular correlation with urinary volume. This may suggest that changes on blood gas tensions can influence on urinary $PCO_2$. 4. There were eminent clear inverse correlation between urinary $PCO_2$ and osmolar concentrations of urine. Above results strongly suggest that partial pressure of gas in urine primarily depend upon counter-current exchanges in renal medullary tissues.

• 한국산업보건학회지
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• 제25권2호
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• pp.134-145
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• 2015

Objectives: An objective of this study was to perform a risk assessment and social cost-benefit analysis for revising permissible exposure limits for seven substances: Nickel(Insoluble inorganic compounds), benzene, carbon disulfide, formaldehyde, cadmium(as compounds), trichloroethylene, touluene-2,4-diisocyanate. Materials and Methods: The research methods were divided into risk and hazard assessment and cost-benefit analysis. The risk and hazard assessment for the seven substances consists of four steps: An overview of GHS MSDS(1st), review of document of ACGIH's TLVs (2nd), comparison between international occupational exposure limits and domestic permissible exposure limits(3rd), and analysis of excess workplace and excess rate for occupational exposure limits based on previous work environment measurement data(4th). Total cost was estimated using cost of local exhaust ventilation, number of excess workplace and penalties for exceeding a permissible exposure limit. On the other hand, total benefit was calculated using the reduction rate of occupational disease, number of workplaces treating each substance and industrial accident compensation. Finally, the net benefit was calculated by subtracting total cost from total benefit. Results: All the substances investigated in this study were classified by CMR(Carcinogens, Mutagens or Reproductive toxicants) and their international occupational exposure limits were stricter than the domestic permissible exposure limits. As a result of excess rate analysis, trichloroethylene was the highest at 11%, whereas nickel was the lowest at 0.5%. The excess rates of all substances except for trichloroethylene were observed at less than 10%. Among the seven substances, the total cost was highest for trichloroethylene and lowest for carbon disulfide. The benefits for the seven substances were higher than costs estimated based on strengthening current permissible exposure limits. Thus, revising the permissible exposure limits of the seven substances was determined to be acceptable from a social perspective. Conclusions: The final revised permissible exposure limits suggested for the seven substances are as follows: $0.2mg/m^3$ for nickel, 0.5 ppm(TWA) and 2.5 ppm(STEL) for benzene, 1 ppm(TWA) for carbon disulfide, $0.01mg/m^3$(TWA) for cadmium, 10 ppm(TWA) and 25 ppm(STEL) for trichloroethylene, 0.3 ppm(TWA) for formaldehyde, and 0.005 ppm(TWA) and 0.02 ppm(STEL) for toluene diisocynate(isomers).

• 보건행정학회지
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• 제28권3호
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• pp.195-196
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• 2018

The Korean Academy of Health Policy and Management (KAHPM) has shown remarkable achievements in the field of health policy and management in Korea for the last 30 years. The KAHPM consists of experts in various fields of health policy and management, and has been the leading academic discussion forum for health policy agendas of interest to the public. Health Policy and Management (HPM), the official journal of the KAHPM, published the first issue of volume 1 in October, 1991 and is publishing the second issue of volume 28 as of 2018. Currently, it is one of Korea' main journals in the field of health policy and management. HPM has published a special issue in commemoration of the 30th anniversary of the KAHPM. The HPM invited authors, including former presidents of the KAHPM and current board members, to write about main issues in health policy and management. Although the HPM tried to set up an invited author on all subjects in the health policy and management field, 19 papers are published, that completed the peer review process by August, 2018. The authors of the special issue of the 30th anniversary of the KAHPM include six former presidents, a senior professor, and 12 board members. The subjects of this issue are reform of the healthcare delivery system, health insurance and medical policy, reform of health system governance, the role of National Health Insurance Service (NHIS), the Korea Institute for Health and Social Affairs (KIHASA) and the National Evidence-based healthcare Collaborating Agency (NECA), ethical aspects of health policy change, regional disparities of healthcare, healthcare accreditation, new healthcare technology evaluation system, globalization of the healthcare industry, the epidemiological investigator system, the quarantine system, safety and disaster, and official development assistance. There are some remaining topics to deal with for the KAHPM: aged society, anti-smoking, non-infectious disease, suicide, healthcare resources, emergency medical care, out-of-pocket money, medical fee payment system, medical aid system, long-term care insurance, industrial accident compensation insurance, community-centered health welfare system, and central government and local government of health. The HPM will continue to publish review articles on the main topics in health policy and management. This is because the KAHPM, which has been the leading academic society of Korea's health policy and management for the last 30 years, feels responsible for continuing its mission for the next 30 years.

• 한국컴퓨터정보학회논문지
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• 제17권3호
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• pp.185-191
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• 2012

상조서비스 사업의 본질은 상품과 서비스를 일반 상거래로 보는 것이 일반적인 시각이다. 사업자 즉 상례와 관련된 상조조직과 상조회사가 서비스이용자와의 계약을 통해 이루어지는 계약을 통해 장래 회원의 요구시점에 상품과 서비스를 제공하고 회원은 그 가격을 현재의 가격으로 대금을 지급하되 할부로 지급하는 것이다. 이런 상조업은 2005년 이후 이를 수행하는 업체수가 급증해 규모면에서도 3조원이 넘을 것으로 추정되는 거대한 사업으로 확장 되었다. 그러나 상조업 자체가 선불식 할부거래라는 특성 때문에 현행 개정된 할부거래에 관한 법률에서 규정하는 내용은 과거보다는 현실화가 되어 있기는 하지만 미흡한 점은 여전히 있다고 본다. 예를 들면 상조조직과 상조회사의 가입자에 대한 설명의무, 선수금예치계약에 따르는 소비자보호문제, 상조회사 설립시의 자본액의 상향 문제 등 제반 법적 검토 사항에 대한 입법적 불비가 그러하다. 본 논문에서는 이런 점들을 검토하고 다양화된 상조서비스 이용자의 점진적이고 확대되는 상조산업의 발전을 위하여 지적한 법적 사항에 대한 개선점과 할부거래에 관한 법률과 별도의 상조업법의 단일 입법을 결론적으로 주장하였다.

• 대한의용생체공학회:의공학회지
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• 제34권1호
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• pp.8-13
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• 2013

Persons with sensorineural hearing impairment have troubles in hearing at noisy environments because of their deteriorated hearing levels and low-spectral resolution of the auditory system and therefore, they use hearing aids to compensate weakened hearing abilities. Various algorithms for hearing loss compensation and environmental noise reduction have been implemented in the hearing aid; however, the performance of these algorithms vary in accordance with external sound situations and therefore, it is important to tune the operation of the hearing aid appropriately in accordance with a wide variety of sound situations. In this study, a sound classification algorithm that can be applied to the hearing aid was suggested. The proposed algorithm can classify the different types of speech situations into four categories: 1) speech-only, 2) noise-only, 3) speech-in-noise, and 4) music-only. The proposed classification algorithm consists of two sub-parts: a feature extractor and a speech situation classifier. The former extracts seven characteristic features - short time energy and zero crossing rate in the time domain; spectral centroid, spectral flux and spectral roll-off in the frequency domain; mel frequency cepstral coefficients and power values of mel bands - from the recent input signals of two microphones, and the latter classifies the current speech situation. The experimental results showed that the proposed algorithm could classify the kinds of speech situations with an accuracy of over 94.4%. Based on these results, we believe that the proposed algorithm can be applied to the hearing aid to improve speech intelligibility in noisy environments.

• 한국보건간호학회지
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• 제13권1호
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• pp.41-62
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• 1999

Recently the request of the patients to participate in the medical courses has been expanding due to elevated sense of right on the people's health. merchandised medical treatment by mass supply, human right declaration of the patients, generalized medical informations by the mass media and the change of human relation between the medical personnels and the patients. Under these phenomena the accident by the nurses have been increasing by the area of the nurses having been expanded and their independent roles having been increased. Such nursing accidents are the important subject which the professional occupation of the nurses has been facing but legal protective capability of the nurses has been very weak. Therefore this study has examined the degree of the experience of the nursing accident that happens in the clinical nursing scenes in the general hospital to provide the basic materials for the protection and the counter measures of the nursing accidents. The following is the conclusion based by the above examination. 1) The general characters of the subjects of this study is that they are mostly single in their twenties and graduate from nursing college. Their total clinical career is above 5 years$(44.8\%)$ and their current clinical parts' career is between 1-3 years$(40.1\%)$. So these facts suggest that most hospitals has taken the working rotation policy on nurses. 2) The level of nurses' knowledge on the nursing law is accurate partially but isn't it patially. So it is suggested that nurses need the accurate information and education about the nursing law. But the nurses' attitude is very approved of the establishment of a unilateral nursing law. 3) The relation between the demographic characters of the subjects and their attitudes on the nursing law shows that there is no significant differences except the relation between the attitude 6(the sufficient level of education on nursing law in formal education course) and age. total clinical career. 4) The perception of the nurses shows that the cause of the nursing accident has been due to the heavy work$(78.2\%)$. short of professional knowledge and skill$(60.2\%)$, discordance with Doctors. patients and patients' families. They report the accident to the head nurse first$(81.8\%)$ and within 30 minute$(75.1\%)$. The hour of nursing accident frequently happened is regardless of service hour with $49.4\%$ in response rate. the highest rate. and the nursing accident happens in the night more than the daytime. Even though most nurses think that they are themselves responsible for nursing accident. it is found that the chief cause of the nursing accident is due to the nurses' heavy work$(78.2\%)$. So the causes of nursing accidents is analysed. it may be suggested that the endeavor of hospital and nursing organizations to decrease nursing accidents is very important. 5) The coping patterns of patients with nursing accidents are mostly active attitude such as a violent words$(69\%)$. sue or accusation$(36.4\%)$, monetary compensation $(35.6\%)$ except a understanding cases$(38.7\%)$. But the coping patterns of hospitals with nursing accidents are mostly to investigate the accurate cause.

• 대한전자공학회논문지SD
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• 제49권7호
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• pp.1-9
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• 2012

기존의 LED 패키지가 갖는 온도에 따른 광 특성 변화 문제를 해결하기 위하여 온도센서가 집적된 LED 패키지 시스템을 제안하였다. 패키지의 온도를 실시간으로 측정하기 위하여 정확도가 우수하며 온도에 따른 저항의 변화가 선형적인 특징을 갖는 온도센서(RTD 형)를 설계하였으며, 장기간의 안정성을 보장하기 위하여 안정된 박막의 증착조건을 결정하고 이를 바탕으로 $1.560{\Omega}/^{\circ}C$의 민감도를 갖는 온도센서를 패키지 내부에 제작하였다. 제작된 패키지를 이용하여 온도에 무관하게 일정한 광량을 나타내는 시스템의 구현을 위하여 변환 회로부와 제어 회로부를 제작하고 이들을 결합함으로써, 패키지의 온도 변화에 따라 PWM duty ratio의 변화를 통해 광 출력을 보상해 주는 시스템을 제안하고 제작하였다. LED의 동작온도인 $0^{\circ}C$에서 $140^{\circ}C$ 범위에서 PWM duty ratio를 관측한 결과 제안했던 일정한 광량을 위한 PWM duty ratio에 매우 근접한 출력 신호를 발생시키는 것을 확인할 수 있었다.

• 대한전자공학회논문지SD
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• 제45권1호
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• pp.64-70
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• 2008

고성능 영상 압축 알고리즘으로서 널리 사용되고 있는 H.264 디코더의 디블록킹(Deblocking) 필터는 복호된 영상의 블록화 현상을 제거함으로써 영상의 질을 높이는 역할을 하는데 연산량이 많은 유닛중 하나이다. 본 논문에서는 효율적인 디블록킹 필터 설계를 위해 파이프라인 구조 및 1-D 필터를 사용하고 효율적인 메모리 관리를 통해 하드웨어 면적과 연산 사이클 수를 줄이고 H.264 디코더의 성능을 향상시킬 수 있는 하드웨어 구조를 제안한다. 제안된 구조에서는 픽셀의 재배치를 통해 동일한 1-D 필터를 이용하여 수직방향의 필터연산과 수평방향의 필터연산을 모두 지원한다. 또한 4 개의 메모리 블록 구조를 이용하여 현재 매크로블록의 픽셀과 인접한 다른 매크로블록의 픽셀의 접근 및 저장을 효율적으로 할 뿐만 아니라 필터 연산중에 움직임 보상기의 출력 픽셀을 저장하여 디블록킹 필터와 움직임 보상기 사이의 병목현상을 제거하였다. 이를 통해 디블록킹 필터에 관련된 메모리의 크기를 최소화하고 H.264 디코더의 성능을 향상시키는 이점을 얻을 수 있다. 제안된 디블록킹 필터는 Verilog-HDL을 이용하여 설계하고 FPGA를 통해 검증하였다. 합성 결과 77 MHz에서 HD 영상 디코딩이 가능함을 확인하였다.

• 대한치과의사협회지
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• 제48권4호
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• pp.280-287
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• 2010

1. 치과의사 분포가 적은 군 단위 이하 비도시 지역의 장애인 치과 접근도를 개선해야 할 필요가 있다. 2. 장애 환자의 진료시 일반인 진료 시와 다르게 보조 인력의 추가 투입의 필요성 및 만일의 사고시의 보상 제도가 마련되어야 할 것으로 생각된다. 3. 응답한 치과의사의 39.7%만이 장애인에게 일반인과 같은 수가를 적용하고 있었고, 38.2%의 치과의사는 장애인에게 전혀 비용을 받지 않고 있었다. 4. 여러 어려움에도 불구하고 대다수의 장애인을 진료하는 치과의사들은 일반인과 마찬가지로 장애환자에게 필요한 치료를 모두 제공하려고 노력하고 있는 것으로 생각된다. 그러나 임플란트, 보철 교정, 심미 치료의 접근성은 어려운 것으로 나타났다. 5. 현행의 공공 지원금 배분이 접근도가 높은 공공 병원에 집중되고 있어 실제 수행하는 진료 비중에 따른 분배 체계의 합리적인 개선이 요구되는 상황으로 보인다.