One of the most demanded competencies of an oral health professional such as an oral pathologist is the ability to make clinical decisions. The purpose of this study was to examine the neurological differences between beginners and experts in the clinical decision-making process which consisting of complex, dynamic and sophisticated cognitive processes, and to identify the characteristics of experts based on the brain by comparing EEG activity. This study conducted experimental design with 10 dentists with more than 10 years of clinical experience and 10 students with short clinical experience as beginners as a fourth year student before graduation. The hypothesis-oriented algorithm proposed in HOAC II was used. As a standard, the clinical decision-making stage of the dentist was divided into three stages, and an event was developed and an experiment was designed for measuring EEG for each stage. The cerebral activity distribution patterns of the two groups were measured with EEG, compared and analyzed with pre-processing process using EEGlab. As a result, the difference in the auditory information was not noticeable between the novice and the expert, but the difference between the group of the novice and the expert appeared in the visual data and the radiographic data. In the case of beginners, the activity was higher in the left hemisphere, and in the case of experts, both brains were activated. The results of this study are intended to present objective information based on brain-based analysis of differences that appear in the clinical decision-making process of experts and beginners. It can be used as basic research data to present the brain-based characteristic analysis of dentist experts.

Employing national consumer panels in the US and Korea (N = 767), this research examined how consumer evaluations of graphic sexual ads on social media differ from those of non-sexual ads, and to what extent such evaluations are influenced by different cultural backgrounds (Individualism vs. Confucianism) and sexual self-schema (SSS) levels.

본 연구에서는 점근해석 및 논로컬 이론에서 요구하는 4차 이상의 고차 미분근사를 수행하기 위하여 계방정식에 혼합변분이론을 적용하여 MLS 차분법으로부터 구해지는 고차 미분근사의 정확도를 큰 폭으로 향상시킨다. 또한, MLS 차분법에 존재하는 세 가지 조건변수에 따른 고차미분근사의 정확도를 비교·분석한다. 혼합변분이론의 합응력을 후처리하여 변위의 미분을 근사할 경우 기존의 변위장 기반 계방정식의 차분 결과에 비해 미분 차수가 2차 낮아진다. 해석 범위내 절점 수가 과도하게 많거나 기저 차수가 클 경우 MLS 차분법의 영향영역 내에서 과적합(overfitting)이 발생한다. 또한 영향영역이 최적 범위 이상으로 넓어질 경우 근사의 정확도가 떨어진다. 위 내용을 사인 하중을 받는 단순지지보 수치예제로부터 확인하였다.

본 연구는 기존 선박에 자외선 (UV) 평형수처리장치(BWMS)를 설치 한 경우, 수치 계산을 통해 평형수 처리시간의 증가를 정량적으로 조사하였다. 계산 결과 배수량 55,000톤 가스 운반선의 평형수 처리시간은 UV BWMS 미설치 및 유량 제어 기능 없이 2.152 시간이었다. 평형수 처리시간은 UV BWMS 설치 후 14.2 % 증가했으며, 유량 제어 기능까지 고려 시 20.4 % 증가했습니다. 실제 조건들을 고려하면 UV BWMS 설치 후 평형수 처리시간은 기존 평형수처리시간 대비 최소 30 % 정도 증가할 것으로 예상됩니다. 따라서 업계 관계자는 평형수 처리시간 증가로 인한 선박 운영 손실을 최소화하기 위하여 UV BWMS 선정시 본선의 실제 평형수펌프 용량과 UV BWMS의 유동 에너지 손실을 충분히 고려하는 것이 좋습니다. 또한 BWMS 설치 후 평형수 처리시간 증가를 최소화하기 위해서는 더 큰 용량의 BWMS, 더 큰 파이프 및 내부 코팅이 있는 파이프 등의 사용을 고려할 수 있습니다.

‘率’ has only one shape in Yin-Shang scripts. However, from the early to middle Western Zhou Dynasty, there appear several other variants with components of ‘止’, ‘彳’, ‘’, ‘’, ‘行’, ‘’, respectively: ‘’, ‘’, ‘’. In the Chu bamboo slips, ‘’ with the component of ‘’ is common, and there also exists ‘’ with that of ‘行’. Based on these observations, this article demonstrates that, in bronze inscriptions and Chu bamboo slips, ‘’ and its provincial variants all together express the meaning of military leadership, which is supported by consistent data from the early Western Zhou Dynasty to the Warring States Period. From the late Western Zhou Dynasty, the four dots in ‘率’ begin to be omitted or interchanged with ‘行’ and ‘止’. However, ‘’, ‘’ and other variants are all active verbs denoting ‘to lead’ and ‘to command’ in a war. Looking at ‘率’ found in Chu bamboo slips makes it clear that its main shape is ‘’ which is also used as an active verb denoting ‘to lead’. From its shape and meaning, it is seen to be equivalent to ‘’ in Jinwen and Shuowen. All the abovementioned character shapes containing ‘止’ are, in fact, variants of ‘’. However, the characters of ‘’ and ‘’, which only contain ‘行’ and lack ‘止’, have a different meaning in Jinwen and Chu bamboo slips from those containing the radical of ‘止’ such as ‘’ and ‘’. The former is passive verbs denoting ‘to be led’ and ‘to follow’. This group of variants is equivalent to ‘率’ in the pre-Qin period, which seems to be a consistent rule in the pre-Qin script.

Background: Ankle sprain in the Lead Leg Side (ALLS) is common in fencing athletes, and studies comparing the ankle range of motion (ROM) and strength of both legs are insufficient. Objectvies: To compare the ankle ROM and hip strength between two legs in fencing athletes who has ankle instability in the lead leg side. Design: Cross-sectional design. Methods: Seven fencing athletes with ankle instability participated in this study, and they randomly assigned into ankle in the Lead Leg Side (ALLS) and ankle in the Rear Leg Side (ARLS). Instability was determined by the Cumberland Ankle Instability Tool (CAIT), and then joint ROM and hip muscle strength were measured. Results: There were significant differences in dorsiflexion ROM, hip strength (extension and abduction) between the ALLS with ankle instability and ARLS (P<.05). Conclusion: This study suggests that the ankle ROM and hip muscle strength of ARLS are greater than ALLS in fencing athletes with ankle instability.

한국사회에서 노인인구가 급격히 증가하고 기대수명이 증가함에 따라, 노인의 행복에 대한 관심이 매우 증대하고 있고 노년기의 행복에 대한 연구가 많아지고 있다. 그런데 이같은 노년기의 행복에 관한 연구에서 젠더의 차이가 쉽게 간과되는 경향이 있다. 한국사회의 경우 생애사적으로 남녀 간의 경험차가 상당하다는 점에서 젠더 차이에 기반한 노년기 행복 연구에 필요해 보인다. 이런 문제의식 하에 본 연구는 젠더 차이가 사회적 지지와 노년기의 행복에 어떤 영향을 미치는지를 분석하였다. 여성노인과 남성노인 간 사회적 지지의 차이를 분석한 결과, 사회적 지지의 하위요인인 물질적 지지와 긍정적 상호 작용이 젠더에 따라 유의한 차이를 보이는 것으로 나타났다. 또한 행복에 관한 분석에서도 젠더 차이가 통계적으로 유의한 것으로 나타났다. 노년기 행복에서 사회적 지지는 두 집단 모두에 중요한 영향을 미쳤다. 이러한 연구결과를 바탕으로 본 연구는 사회적 지지의 확대와 노년기의 행복 증진을 위하여 어떤 노력이 수반되어야 하는지 제언하고, 동시에 그것이 갖는 함의에 대해서도 논의하였다.

Background: The range of pelvic tilt is one of modifiable risk factors in preventing the lower back pain. Objects: The purpose of this study were to compare the range of pelvic tilt motion by testing position and sex. Methods: One hundred five young adults (61 females and 44 males) agreed to participate in measuring the anterior and posterior pelvic tilt with the PALM (Palpation Meter) in sitting and standing. The range of pelvic tilt motion was defined as the difference between the pelvic anterior and posterior tilt angles. Results: In general, the anterior pelvic tilt was greater (p < 0.01) in standing than in sitting and the posterior pelvic tilt was lesser (p < 0.01) in sitting than in standing. The anterior pelvic tilt in sitting and standing was greater (p < 0.01) in the females than in the males. However, the effect of sex on the posterior pelvic tilt was only significant in sitting (p < 0.01), but not in standing (p = 0.78). The range of pelvic tilt was greater (p = 0.03) in sitting but not significantly (p = 0.07) affected by the sex. Conclusion: The pelvic tilt motion in these young adults showed large variability and further studies are needed to understand better its relationship to the prevalence of the lower back disorders.

Using the developed wedding planner selection criteria scale, this study examined whether wedding planner selection criteria differ according to consumer characteristics such as demographic characteristics and wedding preparation behaviors. The main survey for this study was conducted via the Internet with 295 consumers aged 20-30 living in the Seoul metropolitan area. The data collected from the survey processed and analyzed using the statistical programs SPSS 21.0 t-test. Analyzing how wedding planner selection criteria differ according to consumers’ demographic characteristics and wedding preparation behaviors, results shown for the wedding planner selection criteria were all four points on average except for individual characteristics and important sub-factors regardless of the consumers’ characteristics, and various results were derived depending on the consumers’ characteristics. This study has various practical implications in that it verified the difference in wedding planner selection criteria according to consumer characteristics and determined how much money consumers were willing to play for wedding planners. It is recommended that future studies take various approaches to investigate how wedding planner users are satisfied with or place importance on wedding planner services and conduct empirical using the selection criteria developed in this study to compare influential variables that affect behavior intention and willingness to pay according to consumer type.

Background: Due to aging, blood flow rate decreases, also posture and chewing habit may be changed. Objective: To identify that changes in blood velocity in the common carotid arteries (CCAs) in old persons with unilateral chewing habit (UCH) and forward head posture (FHP) in the elderly. Design: An observational cross-sectional study. Methods: Chewing habits, FHP, and CCAs velocities were assessed in 85 elderly subjects. Chewing habits were measured by visual observation. CCAs measured the peak systolic velocity (PSV), end-diastolic velocity (EDV), minimum diastolic velocity, and resistivity index. The subjects were divided into UCH and bilateral chewing habit groups depending on chewing habit. The subjects were also divided into >49 degrees and <49 degrees for comparison of blood flow between the left and right CCAs. Results: In the UCH, the chewing side had significantly higher EDV (P=.003), PSV (P=.023) than the non-chewing side. There was no significant difference in velocity between the CCAs in the FHP. Conclusion: This study shows that the blood flow velocity of the chewing side of UCH was higher, and unilateral chewing affects the CCAs velocity and thus highlight the importance of chewing habit in the elderly than head posture.

본 연구는 미래사회 인재를 양성하기 위한 전문대학의 학습자, 교수자의 관점에서 기초학습능력 지원 요구를 파악하고 이를 통해 비교과 프로그램의 체계적 지원방안을 모색하고자 하였다. 연구결과, 기초학습 역량의 중요도의 경우 교수자가 학습자보다 더 중요하다고 인식하였다. 비교과 프로그램별 인식 차이 결 과, 기초학습지원 프로그램에서는 전공기초, 학습클리닉 프로그램, 외국어지원 프로그램에서 학습자보다 교수자가 더 중요하다고 인식한 것으로 드러났다. 또한 대학지원 생활 프로그램의 경우에도 교수자가 더 중요하다고 인식한 것으로 드러났다. 마지막으로 취업지원 프로그램의 경우 어깨동무튜터링, 생생멘토링, 전공으뜸이 프로그램 모두에서 교수자가 더 중요하게 인식하는 것으로 나타났다. 결과적으로 모든 프로그 램에서 교수자의 인식이 학습자의 인식보다 높게 나타났다. 연구결과를 기반으로 도출된 전문대학 학습자 의 기초학습역량 강화 및 비교과 프로그램에 대한 제언은 다음과 같다. 첫째, 학습자들을 대상으로 기초학 습역량 인식 개선을 위한 지원방안을 강구해야 한다. 둘째, 기초학습역량 향상을 위한 대학 시스템 구축이 필요하다. 세부적으로 첫째, 기초학습향상을 지원하는 인력풀 확보 및 인센티브 제공 등 유인책이 제공되 어야 한다. 둘째, 대학 특성에 맞는 비교과 프로그램이 개설되어야 한다. 셋째, 비교과 프로그램은 전공별, 학습자 특성에 맞는 과정으로 체계화되어야 한다. 넷째, 학습자 중심형 비교과 프로그램으로 개선될 필요 가 있다. 다섯째, 비교과 프로그램의 선순환 구조를 형성할 필요가 있다.

The purpose of this study is to solve the problem of revision or abbreviation of questionnaires based on the previous studies suggested by many existing empirical studies. In addition, this study aims to provide the theoretical basis of the research method which has been variously approached since it presents the methodology that can directly measure the research object. For this purpose, this study proposed a more elaborate analysis method using the differences in perception of individuals who are interested in cognitive research. Specifically, the perception gap(D) can be used as an independent variable, a dependent variable, and a moderating variable. And this study suggested an effective research approach using the measurement of perception difference. The difference of perception suggested that it can be used as a measure to overcome the limitations of existing researches used it as independent variables or mediating variables that measure only one factor of expectation and performance or importance and satisfaction. In addition, it is highly likely that various analyzes on the perception differences, which are the result of measuring target factors for the same person, will be quite effective in the situation where follow-up of respondents is difficult. This study is expected to overcome various limitations reported by empirical studies such as scale utilization problem and follow-up survey difficulty. In future research, it was expected that the limitation of the factor derivation process in the research approach could be complemented by web crawling and text mining of big data analysis.

FDM 3D Printer is used in maker space for mass production by the maker. Makers desire to manufacture products in a variety of colors using ABS Filaments. The purpose of this study is to identify the relation between the color of resin and each position on the bed. So, when printed using the 3D Printer, we found out the difference in the colors that it appears depending on the position of the bed. To see the difference in color, basic, blue, yellow, white, and black were selected and the bed plate was divided into three sections. Specimens were measured to obtain delta E values between each sections by the chromatic differential system. Obtained delta values were analyzed by the NBS system. As a result, the delta E value of black was found to correspond to “Appreciable”. In most cases, delta E values between the middle and the outer or the inner and the outer was greater than values between the middle and the inner. Using Infrared Thermal Camera, We found that the color difference relates 3D printing positions and temperatures. As a result, the 3D printing bed positions should be considered when 3D printing mass production.

This study examined the difference of dietary intake behavior between groups of adults aged >20 years with or without dyslipidemia, and comparing the various types of dyslipidemia, based on the Seventh (2016) KNHANES. Men showed higher rate for triglyceridemia and LDL-cholesterolemia than women and subjects in the age group 50-59 years exhibited the highest incidence of triglyceridemia, total cholesterolemia and HDL-cholesterolemia. The ratio of obese people was higher in most types of dyslipidemias. The top five foods in each group of cereal & grain, meat, vegetable, and fruit were selected for analysis, based on the food frequency. The dyslipidemia group showed higher intake frequencies for mixed grains, cabbage kimchi and leafy vegetable than the no-dyslipidemia group, and the group with high blood total cholesterol for mixed grains, apple, and cutlassfish-croaker. Group with high blood triglyceride showed higher intake frequencies of rice and mackerel-mackerel pike than the other groups of high blood triglyceride. No food showed significant difference in the frequencies between groups of LDL-cholesterol. Group with high blood HDL-cholesterol showed higher intake frequency of bibim-fried rice, deep fried chicken, stir fried chicken, apple, tangerine, banana and butter-margarine. These results indicate that people with high levels of blood total cholesterol are more concerned with food having health benefits than those with abnormal levels of other blood lipid. More information on dietary benefits need to be provided to patients having high levels of triglyceride, LDL-cholesterol and HDL-cholesterol.

목적 : 본 연구에서는 근시안에서 동공 크기에 따른 굴절이상도의 차이에 영향을 미치는 요인을 알아보고자 하였다. 방법 : 백내장을 제외한 안질환 및 안 수술의 과거력이 없고, 근시안이며 최대 교정시력이 1.0 이상인 18~58 세의 성인 75명(75안)을 대상으로 하였다. i.profilerplus(Zeiss, Germany)를 이용하여 반암실 상태(5~50 lx)에서 동공 중심부 5 mm와 3 mm 영역에서 현성굴절검사와 각막 및 안구의 수차 검사를 실시하였다. Paired t-test를 이용하여 동공 크기에 따른 측정값 평균의 차이를 비교하였다. Spearman correlation test를 이용하여 동공 크 기에 따른 평균 구면렌즈 대응치의 차이와 고위수차의 상관성을 알아보았고, Multiple regression analysis를 시 행하여 동공 크기에 따른 평균 구면렌즈 대응치의 차이에 영향을 미치는 인자를 평가하였다. 결과 : 평균 구면렌즈 대응치는 5 mm와 3 mm에서 각각 -4.08±2.90 D와 -3.84±2.95 D로 유의한 차이를 보였다(p<0.001). 동공 크기에 따른 평균 구면렌즈 대응치의 차이(5 mm에서 평균 구면렌즈 대응치 -3 mm에서 평균 구면렌즈 대응치)와 안구의 고위수차는 통계적으로 유의한 음의 상관관계를 보였다(r=-0.676, p<0.001). 연령과 성별을 보정 한 후 동공 크기에 따른 평균 구면렌즈 대응치의 차이(≥0.25 D) 유무에는 구면수차(spherical aberration, Z40)와 수직난시수차(vertical astigmatism, Z4-2)가 영향을 미치는 것으로 나타났다. 결론 : 근시안에서는 눈의 고위수차와 저위수차의 상호작용으로 동공 크기에 따른 평균 구면렌즈 대응치의 차이가 생길 수 있으므로, 고위수차 검사 결과 값을 고려한 교정 도수를 통하여 안경 착용 시 만족도를 증가시켜야 할 것으로 생각된다.