• 정신신체의학
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• 제10권2호
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• pp.101-109
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• 2002

연구목적: 통증환자의 인지적 특정은 통증에 대한 지각이나 치료에 대한 반응에서 중요한 역할을 한다. 지각된 통제소재와 같은 인지적 특정이 통증환자의 정서장애나 대처방식과 어떤 관련이 있는지 알아보고자 하였다. 방법: 통증클리닉을 내원하여 치료를 받고 있는 환자 96명을 대상으로 지각된 통제소재를 알아보는 질문지와 미네소타 다면적 인성검사 (MMPI), 대처방식질문지, 주관적으로 통증의 정도와 시간, 괴로움정도, 통제정도를 평정하도록 하여 이 자료를 토대로 분석하였다. 결과: 자료분석결과 환자가 지각하는 통제소재가 내부에 있다고 믿을수록 통증에 대한 통제감이나 통증을 감소시키려는 노력을 했을 때 감소정도가 높은 것으로 보고하였다. 반면 외부통제감이나 우연에 의한 통제감이 높을수록 지각된 통증정도나 통증경험시간, 일상생활 장애정도가 높았다. 또한 내부통제감은 MMPI척도중 자아방어관련척도와 유의한 정적상관을 보였으며, 우울, 불안, 정서억압과 같은 척도와는 부적상관을 보였다. 대처방식 중에서 자기진술 및 감각의 재해석과 같은 방식은 내부통제감를 유의한 정도로 설명하였고 외부통제감과 우연에 의한 통제는 재앙화에 의한 설명변량이 유의한 수준에 이르렀다. 결론: 통증은 비록 신체적 장애이지만 주관적 통증지각이나 일상생활기능정도, 정서적 어려움에는 지각된 통제감과 같은 인지적 요인이 영향을 미친다. 따라서 환자가 통증에 효율적으로 대처하도록 하기 위해서는 내부통제감을 증가시키고 보다 효율적인 대처방식을 사용하도록 인지들 수정해수는 것이 필요하다.

• Radiation Oncology Journal
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• 제12권3호
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• pp.301-305
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• 1994

Purpose :. To investigate the effect of aqueous extract of Ganoderma lucidum(G.I.) on the surival of tumor cells in vitro and on the growth of tumors in vivo. Materials and Methods : Dried G.I. was made into powder, extracted with distilled water, filtered and diluted from a maximum concentration of 100 mg/ml in sequence. The cytotoxicity of G.I, in vitro was evaluated from its ability to reduce the clonogenicity of SCK tumor cells. For the tumor growth delay study, about $2{\times}10^5$$ of SCK tumor cells were subcutaneously inoculated in the legs of A/J mice. The first experimental group of mice were injected i.p. with 0.2ml of 250 mg/kg of G.I. from the first day after tomor inoculation for 10 days. The second experimental group of mice were injected i.p. with 0.2ml of 250 mg/kg of G.I. either once a day for 10 days or twice a day for 5 days beginining from the 7th day after tumor inoculation Results : 1. Cytotoxicity in vitro;survival fraction, as judged from the curve, at G.I. concentration of 0.5, 1,5, 10, 25, 50 and 100 mg/ml were 1.0, $0.74{\pm}0.03$, $0.18{\pm}0.03$, $0.15{\pm}0.02$, $0.006{\pm}0.002$, 0.015 and 0.0015, respectively. 2. Tumor growth delay in vivo; a) the time required for the mean tumor volume to grow to $1,000mm^3$ was 11 days in the control group and 14 days in the experimental group. b) the time required for tumor volume to increase 4 times was 11 days in the control group while it was 10.5 and 12 days in the groups injected with G.I. once a day and twice a day from the 7th day after tumor inoculation respectively. Conclusion : Aqueous extracts of G.I. showed a marked cytotoxicity on the SCK mammary cells in vitro. Tumor growth delay was statistically signiricant when G.I. in-jection was started soon after tumor inoculation, but it was not significant when injection was started after the tumors were firmly established.

• 한국농공학회논문집
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• 제62권2호
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• pp.63-73
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• 2020

Drought is considered as a devastating hazard that causes serious agricultural, ecological and socio-economic impacts worldwide. Fundamentally, the drought can be defined as temporarily different levels of inadequate precipitation, soil moisture, and water supply relative to the long-term average conditions. From no unified definition of droughts, droughts have been divided into different severity level, i.e., moderate drought, severe drought, extreme drought and exceptional drought. The drought severity classification defined the ranges for each indicator for each dryness level. Because the ranges of the various indicators often don't coincide, the final drought category tends to be based on what the majority of the indicators show and on local observations. Evaporative Stress Index (ESI), a satellite-based drought index using the ratio of potential and actual evaporation, is being used as a index of the droughts occurring rapidly in a short period of time from studies showing a more sensitive and fast response to drought compared to Standardized Precipitation Index (SPI), and Palmer Drought Severity Index (PDSI). However, ESI is difficult to provide an objective drought assessment because it does not have clear drought severity classification criteria. In this study, U.S. Drought Monitor (USDM), the standard for drought determination used in the United States, was applied to ESI, and the Percentile method was used to classify drought categories by severity. Regarding the actual 2017 drought event in South Korea, we compare the spatial distribution of drought area and understand the USDM-based ESI by comparing the results of Standardized Groundwater level Index (SGI) and drought impact information. These results demonstrated that the USDM-based ESI could be an effective tool to provide objective drought conditions to inform management decisions for drought policy.

• 한국농공학회논문집
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• 제62권1호
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• pp.83-93
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• 2020

East Asia, which includes China, Japan, Korea, and Mongolia, is highly impacted by hydroclimate extremes such drought, flood, and typhoon recent year. In 2017, more than 18.5 million hectares of crops have been damaged in China, and Korea has suffered economic losses as a result of severe drought. Satellite-derived rainfall products are becoming more accurate as space and time resolution become increasingly higher, and provide an alternative means of estimating ground-based rainfall. In this study, we verified the availability of rainfall products by comparing widely used satellite images such as Climate Hazards Groups InfraRed Precipitation with Station (CHIRPS), Global Precipitation Climatology Centre (GPCC), and Precipitation Estimation From Remotely Sensed Information Using Artificial Neural Networks-Climate Data Record (PERSIANN-CDR) with ground stations in East Asia. Also, the satellite-based rainfall products were used to calculate the Standardized Precipitation Index (SPI). The temporal resolution is based on monthly images and compared with the past 30 years data from 1989 to 2018. The comparison between rainfall data based on each satellite image products and the data from weather station-based weather data was shown by the coefficient of determination and showed more than 0.9. Each satellite-based rainfall data was used for each grid and applied to East Asia and South Korea. As a result of SPI analysis, the RMSE values of CHIRPS were 0.57, 0.53 and 0.47, and the MAE values of 0.46, 0.43 and 0.37 were better than other satellite products. This satellite-derived rainfall estimates offers important advantages in terms of spatial coverage, timeliness and cost efficiency compared to analysis for drought assessment with ground stations.

• 한국산학기술학회논문지
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• 제18권8호
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• pp.285-293
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• 2017

본 연구의 목적은 다면적 인성검사(MMPI-2)의 임상척도와 뇌기능지수 중 자기조절지수와의 관련성을 알아보고자 하는데 있다. 연구는 상담센터에 내원한 20세 이상의 성인 남녀 중 자원한 41명을 대상으로 진행하였다. 자기보고식 검사지인 다면적 인성검사(MMPI-2)를 이용해 검사를 진행했으며, 2채널 뇌파측정기를 이용해 Fp1,과 Fp2에서 뇌파를 측정하였다. 연구결과는 다면적 인성검사(MMPI-2)의 임상척도인 척도2(D)와 자기조절지수 중 휴식 즉, 알파파와 음의 상관을 보였으며, 다면적 인성검사(MMPI-2) 척도3(Hy)은 집중력 즉, 저베타파와 양의 상관성을 보였고, 척도 7(Pt)은 휴식과 음의 상관성을 보였다. 상담현장에서 다면적 인성검사(MMPI-2)와 SQR을 상호 보완하여 사용할 수 있다는데 본 연구의 의의가 있다. 이러한 결과는 세 가지 시사점을 갖는 것으로 해석 가능하다. 첫째, 우울한 정서를 가진 사람들은 타인의 시선과 평가에 민감하여 대인관계를 맺을 시 많은 에너지를 사용하게 되어 휴식이 유지되지 못하기 때문에 피로도가 상승할 수 있다. 둘째, 지나치게 타인의 관심을 얻으려고 하고 쾌활한 모습을 지닌 사람들은 활동력이 높을 것으로 여겨진다. 셋째, 불안과 긴장 상태로 스트레스가 높아진 사람들은 쉽게 지치고 짜증과 불쾌감이 상승할 수 있다는 것을 시사한다.

• Radiation Oncology Journal
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• 제31권2호
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• pp.57-65
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• 2013

Beta-lapachone (${\beta}$-Lap; 3,4-dihydro-2, 2-dimethyl-2H-naphthol[1, 2-b]pyran-5,6-dione) is a novel anti-cancer drug under phase I/II clinical trials. ${\beta}$-Lap has been demonstrated to cause apoptotic and necrotic death in a variety of human cancer cells in vitro and in vivo. The mechanisms underlying the ${\beta}$-Lap toxicity against cancer cells has been controversial. The most recent view is that ${\beta}$-Lap, which is a quinone compound, undergoes two-electron reduction to hydroquinone form utilizing NAD(P)H or NADH as electron source. This two-electron reduction of ${\beta}$-Lap is mediated by NAD(P)H:quinone oxidoreductase (NQO1), which is known to mediate the reduction of many quinone compounds. The hydroquinone forms of ${\beta}$-Lap then spontaneously oxidizes back to the original oxidized ${\beta}$-Lap, creating futile cycling between the oxidized and reduced forms of ${\beta}$-Lap. It is proposed that the futile recycling between oxidized and reduced forms of ${\beta}$-Lap leads to two distinct cell death pathways. First one is that the two-electron reduced ${\beta}$-Lap is converted first to one-electron reduced ${\beta}$-Lap, i.e., semiquinone ${\beta}$-Lap $(SQ)^{{\cdot}-}$ causing production of reactive oxygen species (ROS), which then causes apoptotic cell death. The second mechanism is that severe depletion of NAD(P)H and NADH as a result of futile cycling between the quinone and hydroquinone forms of ${\beta}$-Lap causes severe disturbance in cellular metabolism leading to apoptosis and necrosis. The relative importance of the aforementioned two mechanisms, i.e., generation of ROS or depletion of NAD(P)H/NADH, may vary depending on cell type and environment. Importantly, the NQO1 level in cancer cells has been found to be higher than that in normal cells indicating that ${\beta}$-Lap may be preferentially toxic to cancer cells relative to non-cancer cells. The cellular level of NQO1 has been found to be significantly increased by divergent physical and chemical stresses including ionizing radiation. Recent reports clearly demonstrated that ${\beta}$-Lap and ionizing radiation kill cancer cells in a synergistic manner. Indications are that irradiation of cancer cells causes long-lasting elevation of NQO1, thereby sensitizing the cells to ${\beta}$-Lap. In addition, ${\beta}$-Lap has been shown to inhibit the repair of sublethal radiation damage. Treating experimental tumors growing in the legs of mice with irradiation and intraperitoneal injection of ${\beta}$-Lap suppressed the growth of the tumors in a manner more than additive. Collectively, ${\beta}$-Lap is a potentially useful anti-cancer drug, particularly in combination with radiotherapy.

• 정신신체의학
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• 제26권1호
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• pp.9-18
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• 2018

연구목적 청소년의 내재화장애는 겉으로 표출되지 않으므로 의료서비스 이용을 결정하는 부모나 교사가 그 증상을 인지하기 어렵고 청소년 자신도 정신의학적 개입을 기피하는 경향이 있어 치료 기회를 놓치기 쉽다. 본 연구는 내재화장애 청소년의 정신병리를 자기보고식 강점난점설문지(SDQ-SR)와 MMPI-A를 사용하여 조사하고, 이 두 검사도구가 내재화장애를 진단평가하는데 상호보완성이 있는지를 규명하고자 시행되었다. 방 법 청소년 외래환자(13~17세) 91명을 임상진단에 따라 두 집단으로 나누었으며, 내재화장애집단 44명과 그 외 임상진단을 가진 비교집단 47명이 완성한 SDQ-SR과 MMPI-A 자료가 내재화장애 진단을 어느 정도로 예측할 수 있는지 분석하였다. 결 과 로지스틱 회귀분석 결과, SDQ-SR의 정서증상 소척도가 1점 상승할 때 내재화장애의 진단예측력은 2.27배 증가하였다. 또한 ROC 곡선분석에서, SDQ-SR 정서장애 소척도의 절단점수를 4점으로 했을 때 내재화장애진단의 민감도와 특이도가 각각 88.94와 78.72로 나타났다. MMPI-A에서는 A-anx 절단점수가 56이었을 때 민감도와 특이도는 각각 77.27과 74.47이었다. 그러나 이 두 검사도구 소척도들의 어떠한 조합도 SDQ-SR 정서증상 소척도가 갖는 진단예측력을 더 높이지는 못했다. 결 론 본 연구에서는 청소년의 내재화장애를 진단하는데 SDQ-SR의 정서증상과 MMPI-A의 A-anx, A-aln, A 및 INTR가 중요한 소척도임을 알 수 있었으나 이를 확정하기 위해서는 정상대조군을 포함한 대규모의 연구가 필요하다.

• 한국산학기술학회논문지
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• 제22권5호
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• pp.188-198
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• 2021

본 연구는 장애인복지기관 종사자들 최신기술에 관심도와 최신기술 저항도 및 불안도 간의 관계에서 최신기술 수용도의 매개효과를 검증하는 것을 목적으로 한다. 이러한 목적 달성을 위하여 2018년 7월부터 8월까지 P광역시 장애인복지관 종사자를 대상으로 자료를 수집하여, 187명의 자료를 분석하였다. 분석은 변수간 인과관계 검정을 위해 다중회귀분석을 실시하였고, 매개효과 검증을 위해 Baron과 Kenny(1986)의 단계별 분석 모형을 활용하였으며 매개효과의 유의도 검증을 위해 Sobel test를 실시하였다. 분석결과 최신기술 관심도는 최신기술 수용도를 매개로 최신기술 저항도 및 불안도에 영향을 미침과 동시에 직접적으로는 영향을 미치지 않아 완전매개효과가 있는 것으로 검증되었으며 Sobel test 결과, 통계적으로도 매개효과는 유의미한 것으로 나타났다. 즉, 장애인복지기관 종사자의 최신기술 관심도는 최신기술 수용도를 매개로 저항도 및 불안도를 낮추어 미래사회 적응 가능성을 높이는 것으로 나타났다. 이러한 결과를 바탕으로 최신기술 저항도 및 불안도를 감소시키기 위한 방안을 모색하고, 최신기술 기술에 대한 관심과 최신기술 수용도를 높일 수 있는 관련 방안을 제언하였다.

• 대한치과교정학회지
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• 제40권4호
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• pp.267-275
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• 2010

이번 연구의 목적은 맹출 또는 미맹출된 치아에 교정용 버튼을 부착 후 자가부식 접착제(self-etching adhesive)의 사용 유무에 대한 전단결합강도(shear bond strength)와 탈락모드를 비교하고자 함이다. 각각 84개의 맹출 또는 미맹출된 제3대구치를 사용하였다. 각각 치아의 협측면을 다음의 부착시스템 그룹으로 할당하였다. A, 기존방식: 1, Transbond XT (3M Unitek); 2, Prime & Bond NT (Dentsply/Caulk); 3, Single Bond (3M ESPE); B, 자가부식 접착제; 4, Clearfil SE Bond (Kuraray); 5, Transbond Plus (3M Unitek); 6, Clearfil S3 (Kuraray); 7, G Bond (GC). 부착물의 전단강도와 접착제 잔류지수를 측정하였으며 결과값은 ANOVA와 independent t-test 및 chi-square 검증을 통해 분석되었다. 맹출 또는 미맹출된 치아의 전단결합강도를 비교하였을 때 Clearfil SE와 G Bond에서 유의한 차이가 관찰되었다. Single Bond를 제외한 모든 접착시스템에서 맹출보다는 미맹출 치아면에서 높은 접착강도가 관찰되었다. 기존 접착제를 사용하는 경우 맹출 또는 미맹출 치아에 대한 접착강도에는 차이가 없을 수 있다. 그러나 임상의사는 사용 전에 self-etching system의 종류를 고려할 필요가 있다.

• Journal of Acupuncture Research
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• 제21권6호
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• pp.177-186
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• 2004

Introduction : Recent studies Suggested that there is a strong correlation between acupuncture stimulation and its related cortical activation. Anther study showed that either positive or negative BOLD effects could be observed depending on anatomical structure in acupuncture stimulation. In ttis study, we investigated a new acupoint $KI_6$ (照海), which was known as motor-related acupoint and obtained an evidence that the stimulation of $KI_6$ resulted in either negative or positive BOLD response to stimulation. Methods & Results : 1. Subjects and paradigms : Two separate stimulation paradigms were performed on five healthy (aged 22-23 yrs) in this study. First, the paradigm of acupuncture stimulation was that the acupuncture needle was inserted in acupoints $KI_6$, which is located in lateral side of the foot and then continuously twisted(補瀉를 除外한 捻轉法) for 70 seconds for 10 cycles of activation. During rest period (70 seconds), the needle was completed removed from acupoint. Total 60 cycles were performed and 10 images were obtained per cycle. Second, nonacupoint was randomly selected and the same paradigm was performed as acupoint stimulation. The stimulation protocol comprised 10 cycles of alternating. activation and rest (10 images per cycle). Total 60 cycles were performed and each cycle take about 1.5 sec for motor task. Subjects take an at least 15 minutes break before starting anther paradigm. 2. fMRI mapping : Multi-slice functional images were obtained on a 1.5T Magnetom Vision MRI scanner (Simens Medical, Erlangen, Germany) equipped with high performance whole-body gradients. The BOLD T2 * - weighted images were acquired with acho planar imaging sequence (TR = 1.2 sec, TE = 60 msec, and flip angle = $90_{\circ}$). The other sequence parameter are : FOV = 210 mm, matrix=$64{\times}128$ or $64{\times}64$, slice number=10 and slice thickness = 5 or 8 mm. the anatomic images were obtained with Spin-echo T1-weighted images. The resulting images were then anaiyzed with STIMULATE (CMRR, U. of Minnesota) to generate functional maps using a student T-test (p < 0.005) and cluster analysis. Both positive and negative response were evaluated. Conclusions : We have observed the activation of the motor cortex by stimulating motor-related acupoint ($KI_6$). Among five subjects, negative BOLD response was shown in four and positive response in one. All subjects showed positive response to conventional finger flexion-extension task. To understand the detailed mechanisms of correlation between acupuncture stimulation and BOLD fMRI changes and two typs of response, further study strongly required.