In this study, we investigated the dynamic characteristics of three irregular building models to analyze the effectiveness of displacement response control with Tuned Mass Damper (TMD) installation in twisted irregular buildings. The three irregular models were developed with a fixed angle of twist per story at one degree, subjected to three historical seismic loads and resonant harmonic loads. By designing TMDs with linear and dashpot attributes, we varied the total mass ratio of the installed TMDs from 0.00625% to 1.0%, encompassing a total of 10 values. Two TMDs were installed at the center of the top story of the analysis model in both X and Y directions to evaluate displacement response control performance based on TMD installation. Our findings suggest that the top displacement response control performance was most effective when a 1.0% TMD was installed at the top layer of the analysis model.

In order to present a predictive drift model, Jeju National University's training ship was tested for about 11 hours and 40 minutes, and 81 samples that selected one of the entire samples at ten-minute intervals were subjected to regression analysis after verifying outliers and influence points. In the outlier and influence point analysis, although there is a part where the wind direction exceeds 1 in the DFBETAS (difference in Betas) value, the CV (cumulative variable) value is 6%, close to 1. Therefore, it was judged that there would be no problem in conducting multiple regression analyses on samples. The standard regression coefficient showed how much current and wind affect the dependent variable. It showed that current speed and direction were the most important variables for drift speed and direction, with values of 47.1% and 58.1%, respectively. The analysis showed that the statistical values indicated the fit of the model at the significance level of 0.05 for multiple regression analysis. The multiple correlation coefficients indicating the degree of influence on the dependent variable were 83.2% and 89.0%, respectively. The determination of coefficients were 69.3% and 79.3%, and the adjusted determination of coefficients were 67.6% and 78.3%, respectively. In this study, a more quantitative prediction model will be presented because it is performed after identifying outliers and influence points of sample data before multiple regression analysis. Therefore, many studies will be active in the future by combining them.

이 논문은 西周시대의 天命論을 계승한 孔子의 天命論이 孟子와 荀子를 거 치는 동안 어떻게 계승되고 변천되는지를 고찰한 것이다. 특히 천명관의 가역 성과 불가역성에 초점을 두고 孔孟荀의 차이점을 규명했다. 孔子는 仁을 통해 사람의 주체성을 강조했지만, 天命論에서는 여전히 西周시대의 天命觀을 크 게 벗어나지 않는다. 따라서 孔子의 天命論은 국가 차원과 개인 차원 모두 運 命決定論이라 할 수 있다. 孟子는 孔子의 天命論을 대체로 계승했으나, 天命 의 가역성 측면에서 근본적인 차이를 보이고 있다. 국가 차원의 天命을 보면, 孔子는 제한적인 조건에서 하늘을 주체로 하는 天命의 가역성을 주장한 반면, 孟子는 사람을 주체로 하는 天命의 가역성을 주장했다. 개인 차원의 天命을 보면, 孔子는 天命의 불가역성을 주장한 반면, 孟子는 사람의 의지와 노력으 로 天命을 바꿀 수 있는 가역성을 주장했다. 苟子는 孔孟의 天命論을 일부 계승한 측면도 있으나, 보다 적극적으로 天命을 바꿀 수 있다고 보았다. 荀子 의 天命論은 역성혁명론을 계승했다는 점에서 孟子의 天命論과 유사성이 있 으며, 가역성을 더 강조했다는 점에서 국가 차원과 개인 차원 모두 運命可能 論으로 볼 수 있다. 다만 天命의 가역성 측면에서 孟子보다 더 강하다고 할 수 있다. 주제어: 천명, 천명론, 천명관, 운명결정론, 운명가능론.

In this study, the seismic response characteristics of the three analysis model with or without TMD were investigated to find out the effective dome shape. The three analysis models are rib type, lattice type and geodesic type dome structure composed of space frame. The maximum vertical and horizontal displacements were evaluated at 1/4 point of the span by applying the resonance harmonic load and historical earthquake loads (El Centro, Kobe, Northridge earthquakes). The study of the effective TMD installation position for the dome structure shows that seismic response control was effective when eight TMDs were installed in all types of analysis model. The investigation of the efficiency of TMD according to dome shape presents that lattice dome and geodesic dome show excellent control performance, while rib dome shows different control performance depending on the historical seismic loads. Therefore, lattice and geodesic types are desirable for seismic response reduction using TMD compared to rib type.

목적 : 본 연구에서는 문헌 고찰을 통해 가족 간병인을 대상으로 역량강화 프로그램의 특성에 대하여 분석 하였다. 연구방법 : Pubmed, Excerpta Medica Database(Embase)를 사용하여 2013년 1월부터 2023년 5월까지 출판된 논문을 검색하였다. 주요 검색어는 “empowerment program”, “caregiver”, “caregivers”, “family caregiver”를 사용하였고 총 420편 검색 중 최종 5편의 국외 논문을 선정했다. Hierarchy of levels of evidence for evidence-based practice, PEDro Scale을 통해 연구의 질을 평가하였다. 연구의 분석 내용을 제시하기 위해 Patient, Intervention, Comparison, Outcome(PICO)를 사용하였다. 결과 : 선정된 논문의 대상자는 치매, 경도인지장애, 뇌졸중, 다발성 경화증 환자의 간병인이었다. 중재 기간 4일에서 12주 동안 가족 간병인에게 교육, 상담, 토론 등을 진행하였고 우울, 삶의 질, 간병 부담, 간병 태 도, 자기효능감 등의 영역에서 효과적임을 확인하였다. 결론 : 본 연구에서는 성인, 노인 만성 질환자의 가족 간병인을 대상으로 한 역량강화 프로그램 중재가 효과 적임을 확인하였다. 이는 가족 간병인에 대한 중재 프로그램 임상 활용 및 추후 연구를 위한 정보 제공 및 근거를 마련하였다.

이 연구의 목적은 교직과정을 이수하는 교육대학원생의 심리적, 재정적 어려움으로부터 파생된 불안과 이들이 가진 교직에 대한 희망 사이의 갈등상황을 파악하는 것이다. 이를 위해 지구과학교육 전공 교육대학원생 3명을 연구 대상자로 선정해 내러티브 탐구기법을 적용하여 분석하였다. 첫째, 연구 참여자들의 심리적 불안에 영향을 주는 요소는 전공 지식의 부족, 멘토의 부족, 늦은 출발, 재정적 문제와 차별, 정보의 부족 등이다. 둘째, 연구 참여자는 자신의 삶은 가치가 있다는 인식, 학생들을 선하게 변화시킬 수 있다는 인식, 자신은 점점 발전하고 있다는 인식에서 희망을 얻는다. 셋째, 연구 참여자들은 자신이 가진 희망 요소에 의해 현 상황을 감내하고 있지만 어려움으로부터 파생된 불안과 교직 으로 진출하고자 하는 희망 사이에서 심리적 갈등상황에 놓여 있다. 이러한 결과를 바탕으로 다음과 같은 결론을 도출 하였다. 첫째, 교직과정을 이수하는 교육대학원생의 수요를 바탕으로 정보의 수집 및 분석하여 그들의 요구를 충족시킬수 있는 제도 개선이 필요하다. 둘째, 불안을 극복하지 못하는 교육대학원생들을 대상으로 심리상담 프로그램이 필요하 다. 이 연구는 향후 현시점의 교육대학원이 현직 교사의 재양성에만 초점을 두지 않고 구성원 모두의 만족감을 높일 수 있는 방향을 제시함으로써 더 나은 교육대학원의 환경이 마련될 수 있길 기대한다.

Among the fishing vessels operating in the coastal waters, jigging fishing vessels were considered representative vessels engaged only by wind, sea, tide, and external force. Then, a fishing vessel with a length of shorter than 10 m from July 1, 2018 to August 5, 2019 was studied to obtain a drift prediction model by multiple regression analysis. In the correlation analysis between variables for leeway of speed and direction, the speed and direction of tidal seem to be the most affected in coastal waters. Therefore, it should be considered an explanatory variable when conducting drift tests. As a result of multiple regression analysis on the predicted equations of leeway speed and direction due to the external force on the drift of the fishing vessel, p < 0.000 was considered significant in the F-test, but the coefficient of determination was 55.2% and 37.8%. The effect on the predicted leeway speed was in the order of the tidal speed and current speed. In addition, the impact on the predicted leeway direction was in the order of the tidal speed and current speed.

안정적인 선원 수급을 위해서는 선원의 임금 보장이 필수적이다. 하지만 선원들이 임금을 제대로 받지 못하는 임금체불 분쟁 이 발생하고 있다. 본 연구에서는 선원 임금체불을 해결하기 위해 블록체인 기반 스마트 컨트랙트를 이용하여 임금지불 자동체결시스템 을 설계하였다. 설계한 시스템은 정보등록부, 매칭처리부, 평점관리부, 스마트 컨트랙트를 배포하기 위한 임금 송금 등으로 구성된다. 매 칭처리부는 선원과 선주의 자동알림설정을 위해 임금, 선종/어업, 직위, 면허 등 4가지 변수의 가중치 합이 임계값보다 넘으면 전송되도록 설계하였다. 또한, 평상시 근로조건을 상호 간 잘 이행해 나갈 수 있는 매개체 역할을 위해 평균과 중앙값을 조합하여 평점관리방식을 제 시하였다. 스마트 컨트랙트는 중개자 없이 당사자 간 근로계약을 자동으로 이행하게 함으로써 선주에 의한 임금체불 문제뿐만 아니라 선 원에 의한 선불금 사기, 무등록 직업소개소업자의 횡령, 선원수첩 위조 등의 문제들이 자연히 해결될 것이다. 이러한 시스템 설계가 상용 화되어 제도적으로 활성화될 경우, 선원에게는 안정적인 임금보장과 더불어 선주에게는 인력수급의 어려움이 해결될 것으로 기대된다. 향후 본 시스템 개발을 위해 로컬 환경에서 테스트할 예정이다.

선박의 해양사고 중 부유물 감김사고는 운항지연에 그치지 않고 대형 인명 피해사고까지 이어질 수 있어 이에 대한 예방책이 요구되고 있다. 이에 본 연구는 영해와 베타적경제수역 등을 포함한 해역의 최근 5년간 선박의 부유물 감김사고 데이터를 시·공간적 측면 에서 분석하고, 관련 연구 분야에 기초 자료를 제공하고자 한다. 부유물 감김사고의 상대적 밀도 분포를 시각화하기 위하여 이차원 평활 히스토그램을 적용하였으며, 시간대, 주·야간, 계절에 따른 각 변수가 감김사고에 미치는 영향을 분석하기 위해 다항 로지스틱 회귀모형 을 적용하였다. 공간적 분석결과 전체 사고에 대해 평활화된 밀도 값이 높은 곳은 진해만을 포함한 거제도~통영 해상이었으며, 서해 전곡 항 인근 해상, 제주도 북부 해상으로 나타났다. 시간적 분석결과 부유물 감김사고는 주간에 71.4%로 가장 많이 발생하였으며, 계절별로는 가을철이 다른 계절에 비해 가장 많이 발생한 것으로 분석되었다. 또한, 어선, 수상레저기구, 낚시어선의 감김사고 발생 가능성이 화물선 보다 높은 것으로 조사되었다. 본 연구의 시·공간적 분석결과는 향후 부유물에 대한 단속강화 및 제거를 위한 해양경찰함정 배치와 시간 별·계절별 사고방지를 위한 부유물 사전 제거작업 대책 마련의 기초자료로 활용될 것으로 기대된다.

The fishery compensation by marine spatial planning such as routeing of ships and offshore wind farms is required objective data on whether fishing vessels are engaged in a target area. There has still been no research that calculated the number of fishing operation days scientifically. This study proposes a novel method for calculating the number of fishing operation days using the fishing trajectory data when investigating fishery compensation in marine spatial planning areas. It was calculated by multiplying the average reporting interval of trajectory data, the number of collected data, the status weighting factor, and the weighting factor for fishery compensation according to the location of each fishing vessel. In particular, the number of fishing operation days for the compensation of driftnet fishery was considered the daily average number of large vessels from the port and the fishery loss hours for avoiding collisions with them. The target area for applying the proposed method is the routeing area of ships of Jeju outer port. The yearly average fishing operation days were calculated from three years of data from 2017 to 2019. As a result of the study, the yearly average fishing operation days for the compensation of each fishing village fraternity varied from 0.0 to 39.0 days. The proposed method can be used for fishery compensation as an objective indicator in various marine spatial planning areas.

In this paper, a survey on students’ perceptions of air pollution, particulate matter (PM) and indoor air quality (IAQ) in school classrooms was analyzed. A total of 174 students participated in the survey, where 127 and 47 participants were elementary school students and middle school students, respectively. The elementary school was located in a rural area of Korea, whereas the middle school was located in an urban area. The questionnaire of the survey was mainly composed of three parts: (1) students’ perceptions of air pollution, (2) students’ perceptions of IAQ in the classroom, and (3) students’ perceptions of how to improve IAQ in the classroom. Based on our study, the responses of the students for the given questionnaire showed an opposite tendency. The students in the rural area tended to have positive perceptions regarding IAQ in the classroom as well as air pollution, whereas the students in the urban area revealed negative perceptions for the same items. Our survey results can be used by school officials in order to maintain and improve IAQ in school classrooms based on the perceptions of the students.

PURPOSES : The purpose of this study is to evaluate the asphalt binder properties using FTIR analysis. METHODS : To investigate the chemical properties of asphalt binders, FTIR tests were performed. Recently, FTIR was used for quantification under various aging conditions. Three scans were averaged for each sample within the wavenumber range of 4000 to 400 cm-1, at a resolution of 4 cm-1 (default Simatech software settings). To determine the oxidation of the extracted asphalt binder and the remaining TCE solution in the extracted asphalt binder, the penetration test was adopted and compared. To track the changes in the chemical composition of the aged bitumens, the ATR spectrum of each sample was analyzed, both qualitatively and quantitatively. The qualitative analysis involved identifying characteristic absorption peaks for the functional group of interest, such as polymer components, carbon and sulfur oxidation products, and polar aromatics. RESULTS : The asphalt binder is easily oxidized in air during FTIR testing. To reduce the oxidization of the asphalt binder, the asphalt binder must avoid air contact to measure constant results. Sometimes, the extracted asphalt binder has a residual solvent (TCE), which affects the evaluation of the extracted asphalt binder rheology, such as absolute viscosity and penetration testing. To solve this problem, the research team adopted the FTIR test method. First, the TCE was scanned with FTIR to obtain the chemical characteristics of TCE. After that, the extracted asphalt binder was scanned and the FTIR spectra were compared with those of TCE. If there is a TCE in the extracted asphalt binder, a typical peak was found in the spectrum. Thus, it is possible to estimate the content of the TCE remaining in the extracted asphalt binder via the FTIR test method. CONCLUSIONS : It is possible to evaluate the aging of asphalt binder through FTIR analysis used for the analysis of the chemical structure of asphalt. In addition, during FTIR analysis, the sample is required to avoid air contact to obtain accurate results. FTIR analysis was conducted to confirm whether the solvent (TCE) remained in the extracted asphalt binder and it was confirmed that the penetration increased by a factor of two when the solvent remained. This suggests that it is difficult to control the quality of the asphalt mixture by controlling the amount of recycled additive, as well as the aging of the extracted asphalt binder.

Radon is a radioactive gas material, which is not detectable by humans because of the absence of color and odor. Radon gas can exist indoors through a number of pathways and long-term exposure to such material can affect the human body, which may result in serious health issues such as lung-cancer. It is thus essential to reduce and maintain indoor radon concentration in order that potential health risks from radon can be diminished. In order to achieve the aforementioned goals, it is requisite to utilize a practical detector which is capable of continuous radon monitoring. In relation to this, a recently developed prototype radon detector, i.e., RS9A, provides highperformance comparable to existing research-grade radon detectors for the purpose of continuous radon monitoring in the air. Furthermore, RS9A is a convenient piece of equipment for use by the public as it is compact in size and affordable. In this paper, we conducted continuous measurements of indoor radon concentrations by using sets of RS9A and evaluated the equivalence of RS9A in terms of quality assurance.

In this paper, we conducted a survey to reveal the general perception of parents toward outdoor air quality, particulate matter (PM), and indoor air quality (IAQ) at schools where their children attend. A total of 1,030 parents participated in this survey, where the age of their children ranged between 7 years to over 19 years of age. Each participant was either a member of a non-governmental organization (NGO) with a keen interest in air quality or an ordinary public panel member with less interest. The result of the survey indicated that the participants had a negative perception of air quality, and parents believed that the outdoor and indoor air is extremely polluted. The participants pointed out that they believe that the main reason for the pollution is due to particulate matter (PM) and school classrooms are the location where their children are exposed to PM the most. Based on our study, the majority of the participants prefer a mechanical ventilation system to reduce indoor air pollutants in schools. Our study should be referred to by school officials in order to maintain IAQ and as a way of addressing the concerns of parents who want to protect their children’s health.