• 한국산학기술학회논문지
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• 제16권8호
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• pp.5485-5491
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• 2015

본 연구의 목적은 MBTI의 인식기능(S/N)과 판단기능(T/F)에 대한 문양역전 시각유발전위(PR-VEP)의 특성을 알아보고자 하는 것이다. 연구 대상자는 20세 이상의 성인남녀 136명을 대상으로 2013년 7월부터 8월까지 2개월 동안 PR-VEP와 MBTI검사를 실시하였다. PR-VEP검사는 32채널 뇌파측정기를 이용하여 O1, O2에서 측정하였고, MBTI검사는 Form-M 온라인검사방법을 이용하였다. 연구결과는 S지표 선호집단에서 PR-VEP의 N75와 P100 사이의 시간간격(Duration)이 5.49 ms 유의미하게 짧았고, F지표 선호집단에서 PR-VEP의 N75가 나타나기까지의 잠복기(Latency)가 O1에서 4.83 ms, O2에서 4.27 ms 유의미하게 짧았다. 이는 S유형과 F유형의 특징이 시각적 인지기능과 관계가 있다는 것을 의미하는 것으로, MBTI의 인식기능/판단기능 각 지표에 대한 뇌과학적 해석을 더할 수 있다는 점이 본 연구가 갖는 의의이다.

• 수면정신생리
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• 제27권1호
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• pp.1-7
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• 2020

Mobile digital devices are very familiar and useful devices in the daily life of modern people, and are used for various tasks such as communication, reading, writing, and playing media. As the use of mobile digital devices has become more prevalent, user time has also been increasing. In particular, the number of people who use digital devices before sleep is growing. The light pollution associated with these devices is classified into four categories: urban sky glow, glare, light trespass, and clutter. The pattern in which modern people use digital devices corresponds to light pollution caused by light trespass and clutter from light exposure to artificial light at night. The light pollution caused by digital devices can cause melatonin secretion suppression, delayed sleep onset, reduction of sleepiness before bedtime, and periodic rhythm and cognitive function disturbances. In addition, a study of children and adolescents showed there may be disturbances in the sleep-wake cycle and circadian rhythm, deterioration of sleep quality, and daytime fatigue due to light pollution caused by artificial light at night from mobile digital devices. A multi-faceted research effort is also necessary to investigate the healthy use of mobile digital devices based on research evidence and insights with an accurate evaluation of the influence of mobile digital devices as a form of light pollution.

• 생물정신의학
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• 제25권2호
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• pp.38-43
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• 2018

Objectives Dopamine dysregulation has been regarded as one of the core pathologies in patients with schizophrenia. Since dopamine synthesis capacity has found to be inconsistent in patients with schizophrenia, current classification of patients based on clinical symptoms cannot reflect the neurochemical heterogeneity of the disease. Here we performed new subtyping of patients with first-episode psychosis (FEP) through biotype-based cluster analysis. We specifically suggested basal ganglia structural changes as a biotype, which deeply involves in the dopaminergic circuit. Methods Forty FEP and 40 demographically matched healthy participants underwent 3T T1 MRI. Whole brain parcellation was conducted, and volumes of total 6 regions of basal ganglia have been extracted as features for cluster analysis. We used K-means clustering, and external validation was conducted with Positive and Negative Syndrome Scale (PANSS). Results K-means clustering divided 40 FEP subjects into 2 clusters. Cluster 1 (n = 25) showed substantial volume decrease in 4 regions of basal ganglia compared to Cluster 2 (n = 15). Cluster 1 showed higher positive scales of PANSS compared with Cluster 2 (F = 2.333, p = 0.025). Compared to healthy controls, Cluster 1 showed smaller volumes in 4 regions, whereas Cluster 2 showed larger volumes in 3 regions. Conclusions Two subgroups have been found by cluster analysis, which showed a distinct difference in volume patterns of basal ganglia structures and positive symptom severity. The result possibly reflects the neurobiological heterogeneity of schizophrenia. Thus, the current study supports the importance of paradigm shift toward biotype-based diagnosis, instead of phenotype, for future precision psychiatry.

• 한국사회복지학
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• 제42권
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• pp.41-82
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• 2000

The purpose of this study is to provide empirical findings about intragenerational and intergenerational discrepancies in eldercare attitude and behavior in Korea. Specifically, intragenerational discrepancies refer to phenomena in which eldercare attitude and behavior diverge from each other within the caregiving and care-receiving generations, respectively. Intergenerational discrepancies, on the other hand, refer to two kinds of phenomena, one in which eldercare attitudes are different between caregiver and care-receiver and the other in which eldercare behavior is differently recognized between the two parties. For the last couple decades, these kinds of discrepancies tended to be simply assumed without any coherent theoretical and/or empirical rationales. Thus, the current study tried to investigate the degree, pattern, and characteristics associated with the discrepancies. Analysis of data collected from 276 matched pairs of caregivers (i.e., daughters-in-law) and care-receivers (i.e., the elderly) in Kwangju and its suburb areas has indicated a substantial amount of both intra- and inter-generational discrepancies. In other words, both caregivers and care-receivers were found to be experiencing huge discrepancies between attitude and behavior in their respective generation: the factual discrepancies in attitude between the two generations were quite salient: the cognitive discrepancies in behavior between them were salient, too. In addition, it was also found' that the extent to which the discrepancies became salient differed for the three subdimensions of eldercare (i.e., emotional, economic, and physical care), and that such discrepancies have intimate relationships with a set of sociodemographic characteristics for caregivers - notably, age, educational attainment, area of residence, household income - on the one hand, and those for care-receivers - notably, gender, age, educational attainment, cohabitation, family size, inheritance, owned property - on the other. A series of theoretical, empirical, and clinical implications stemming from the findings were suggested and fully discussed in the context of Korean society.

• 재활복지
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• 제20권4호
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• pp.229-246
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• 2016

본 연구에서는 노년층 40명과 청년층 43명을 대상으로 상위범주어 선택과제를 실시하여 정반응 및 반응시간을 비교하였고, 상위범주어 쓰기과제를 실시하여 정반응 및 오류양상의 차이를 비교하였다. 분석결과, 첫째, 상위범주어 선택 및 쓰기 과제 모두 노년층은 청년층 보다 정반응수가 더 적었다. 둘째, 노년층은 상위범주어 선택과제에서의 반응시간이 유의미하게 느렸다. 셋째, 상위범주어 쓰기과제의 오류양상에서는 노년층은 무관오류보다 연관 오류를 더 빈번하게 보였다. 노년층이 선택과제와 쓰기과제에서 더 낮은 정반응 수를 보인 결과는 정상적인 노화가 진행되면서 의미어휘사전 내 정보 간의 연결이 약화되거나 활성화가 저하되기 때문이라고 볼 수 있다. 반응시간이 긴 이유는 노화에 따른 뇌의 신경생리적 변화와 인지처리 속도 저하에 기인할 수 있다. 목표 상위범주어와 연관된 단어를 산출하는 오류를 보인 것은 비록 노년층이 단어를 완벽히 산출할 수는 없을지라도 목표 단어의 어휘집에 접근하여 의미적으로 연관된 단어를 에둘러 산출하고 목표단어가 가지고 있는 특성들에 대해 우회적으로 설명하는 방식을 취하고 있음을 시사한다.

• 부동산연구
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• 제27권1호
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• pp.7-16
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• 2017

본 연구는 부동산시장에서 개인투자자들에게 전망이론에 따른 투자패턴이 존재하는지 용도지역을 구분하여 검증하였다. 연구의 방법으로는 개인투자자들의 최대잠재이익률과 최대잠재손실률을 이용하였으며, 추가적으로 처분효과의 모형인 정성훈 박근우(2015) 모형을 이용하여 추가 분석을 실시하였다. 분석결과, 개인투자자들에게 전망이론에 따른 투자패턴과 처분효과가 존재하는 것으로 밝혀졌으며, 용도지역에 따른 차이가 나타났다. 개인투자자의 손실회피 성향이 주거용도 부동산자산 보다 상업용도의 부동산 자산에서 더 크게 나타났다. 투자행태에서 이러한 차이는 부동산의 목적과 임대료의 존재가 용도에 따른 투자행태의 차이를 만들어 내는 것으로 판단된다. 본 연구의 한계점으로는 정성훈 박근우(2015)의 연구와 같이 지가지수를 이용하여 미실현이익과 미실현손실을 분석하였다는 점이다. 이는 부동산투자심리에 대한 심도깊은 연구를 위해서는 새로운 부동산 가격지수에 대한 개발 또는 부동산자산에 대한 Benchmark가 필요하다는 것을 의미하며, 추후연구에서는 이를 발전시킬 필요가 있다.

• 한국항해항만학회지
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• 제44권6호
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• pp.469-476
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• 2020

해상교통 분야와 같이 선박, 항해사, 관제센터, 해운선사, 기상시스템, 지리정보시스템 등의 복잡하고 넓은 범위의 요구사항을 갖는 시스템의 모델링 및 시뮬레이션(Modeling and Simulation, M&S)을 위해서는 인간을 포함한 체계가 필요하다. 해상교통을 모의하기 위해서는 주요 요소인 항해사의 인적요인에 대한 모델링이 필요하다. 즉, 현실감 있는 해상교통 상황의 재현 및 예측을 위해 항해사의 행동양식, 항해전문성, 항해오류 등을 모델링하여 반영하는 것이 필요하다. 본 논문에서는 에이전트 기반의 해상교통 시뮬레이션을 위해서 항해사의 충돌회피를 위한 행동 분석을 수행하였으며, 기초 데이터의 확보를 위해 설문조사를 실시하였다. 설문조사를 통해 분석된 정보를 이용하여 선박 충돌상황에서 항해사의 행동과 유사한 에이전트 기반의 항해행동 모델을 개발하였으며, 해상교통분석 시뮬레이션 플랫폼의 개발을 위해 활용될 것이다.

• 대한의용생체공학회:의공학회지
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• 제42권6호
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• pp.295-303
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• 2021

Idiopathic normal-pressure hydrocephalus (INPH) is considered a potentially treatable neurological disorder by shunt surgery and characterized by a triad of symptoms including gait disturbance, cognitive impairment and urinary dysfunction. Although disorders of white matter are generally viewed as the principal pathological features of INPH, analysis of cortical features are important since the destruction of neural tracts could be associated with cortical structural changing. The aim of the study was to determine whether there was any relationship between gait parameter and structural features of cerebral cortex in INPH patients. Gait parameters were measured as follows: step width, toe in/out angle, coefficient of variation (CV) value of stride length, CV value of stride time. After obtaining individual brain MRI of patients with INPH and hemispheric cortical surfaces were automatically extracted from each MR volume, which reconstructed the inner and outer cortical surface. Then, cortical thickness, surface area, and volume were calculated from the cortical surface. As a result, step width was positively correlated with bilateral postcentral gyrus and left precentral gyrus, and toe in/out was positively correlated with left posterior parietal cortex and left insula. Also, the CV value of stride length showed positive correlation in the right superior frontal sulcus, left insula, and the CV value of stride time showed positive correlation in the right superior frontal sulcus. Unique parameter of cerebral cortical changes, as measured using MRI, might underline impairments in distinct gait parameters in patients with INPH.

• 한국의상디자인학회지
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• 제25권2호
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• pp.1-16
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• 2023

Due to the current seriousness of environmental pollution and the eco-friendly movement of the fashion industry, research on sustainable fashion design is being actively conducted. In this study, consumer perception of upcycling products, are divided into image, function, and meaning; and image is further divided into shape, color, and material. It was redefined as pattern, and image recognition was evaluated among men and women in their 20s and 30s, and men and women in their 40s and 50s used as subjects. First, factors that determine each image were extracted based on qualitative analysis of the precedent cases of upcycling bags, and quantitative analysis of the subjects was induced through a questionnaire. As a result of the analysis of evaluation items related to image association, the average frequency analysis of all subjects for each stimuli and the cognitive variance of the frequency analysis by generation by gender were found to be similar. However, awareness of some stimuli by generation showed a significant difference. Overall, in the three stimuli with high overall preference, common features, such as the basic box-shaped symmetrical structure, the monochromatic color of the Munsell system, solid and practical texture, and appropriate use of patterns were identified. In addition, it was confirmed that there was a difference with factors such as femininity, simplicity, touch, and splendor in the measurement factors. In conclusion, it is considered that the main significance of this study is that it excluded the recognition and meaning of upcycling products and explored the original design and image elements of products. Therefore, it is expected that this study will be used as a basic data for responding to the gender image of each generation as an alternative method of sustainable fashion design, and it will be an opportunity to expand the scope of the study to a detailed study beyond the biased topic.

• 한국과학교육학회지
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• 제27권1호
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• pp.84-92
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• 2007

이 연구는 생물학자들이 생물학 현상에서 과학적 의문을 생성할 때 나타나는 두뇌의 활성을 분석하고자했다. 이를 위해서 10개의 의문 생성 과제를 개발하여 8명의 생물학자들에 투입하였고, 의문 생성 과정에서 fMRl를 통해 생물학자들의 두뇌 활성을 측정하여 분석하였다. 그 결과, 방추이랑, 전안구운동 영역, 소뇌, 좌측 전두엽, 좌우측 해마와 대상이랑, 복외측전 두피질부 등이 특징적으로 활성화되었다. 이것은 과학적 의문을 생성하는 과정에서 생물학자들의 뇌는 주어진 생물학 현상을 상세히 분석하였고, 언어적 전략을 사용하였으며, 현재의 현상과 비교하기 위해서 과거의 경험상황과 선지식 등의 장기기억을 인출하고 표상했다고 할 수 있다. 특히 복외측전 두피질부의 활성은 의문 생성 과정에서 뇌가 인지적 갈등 및 부조화 단계를 거쳤음을 보여주었다고 할 수 있다.