목 적 : 뇌사자 안구기증 활성화를 위한 전략의 기초자료를 제공하고자 한다. 방 법 : 경북 소재 일개 대학의 안경광학과 학생과 일반학과 학생을 대상으로 편의 추출하였다. 대상자 의 뇌사자 안구기증에 대한 지식, 태도 정도와 그 차이는 평균·표준편차·ANOVA로, 대상자의 뇌사자 안 구기증 실천의도 영향 요인 분석은 Logistic regression로 분석하였다. 결 과 : 안경광학과 학생의 안구기증에 대한 지식 정도는 11.05점(점수범위 1~17)으로 일반학과 학생의 8.10점에 비해 유의하게 높았으며(t=4.72, p<0.001), 안구기증에 대한 태도 정도는 안경광학과 학생이 3.39 점(점수범위 1~5)으로 일반학과 학생의 3.28점에 비해 유의하게 높은 것으로 나타났다(t=2.80, p<0.01). 안 구기증 실천 의도에 영향을 미치는 요인에 대한 회귀분석 결과, 안구기증 관련 태도가 좋은 대상자가 그렇지 못한 대상자에 비해 1.08배 더 많이 안구기증 실천 의도를 가지고 있는 것으로 나타났다. 결 론: 실제적이고 체계적인 교육을 통해 안구기증에 대한 이해도를 높이도록 해야 할 것이다.

ABSTRACT PURPOSES: It is desirable for buses to be parallel to the face of the bus shelter at a bus stop. In this way, passengers can safely use the buses without moving into the vehicle area. The study was a review of the current bus bay geometric guidelines, to determine whether they lead buses to stop parallel to the face of the bus shelter by analyzing vehicle trajectory. METHODS : A commercial software program for vehicle trajectory analysis was used under our assumptions about bus dimensions and geometric values. The final position of the bus was analyzed for multiple trajectory simulations, reflecting various geometric alternatives. RESULTS: Within the scope of the study, we concluded that the current design guidelines need to be revised by the design values suggested by the study. CONCLUSIONS : The results of the study suggested alternative design values for bus bay geometry, based on the assumption that buses should be parallel to the face of the bus shelter in order to prevent passengers from moving into the vehicle area.

Response spectra of a building are made with a SDOF system taking into account a first mode shape, even though higher modes may affect on the dynamic responses of a high-rise building. A soft soil layer under a building also affects on the responses of a building. In this study, seismic responses of a MDOF system were investigated to examine the effects of higher modes on the response of a tall building by comparing them with those of a SDOF system including the kinematic interaction effect. Study was performed using a pseudo 3D finite element program with seven bedrock earthquake records downloaded from the PEER database. Effects of higher modes on the seismic responses of a tall building were investigated for base shear force and base moment of a MDOF system including story shear forces and story moments. Study results show that higher modes of a MDOF system contribute to a reduction of base shear force up to 1/4-1/5 of KBC and base moment. The effect of higher modes is more significant on the base shear force than on the base moment. Maximum story shear force and moment occurred at the top part of a building rather than at a base in the cases of tall buildings differently from short buildings, and higher modes of a tall building affected on the base forces making them almost constant at the base. A soft soil layer also affects some on the base shear force of a high-rise building independently on the soft soil type, but a soft soil effect is prominent on the base moment.

The study investigated the effect of the flipped class method implemented in a general English program in the tertiary level. The treatment variable of the experiment was a teaching method: a flipped class for the experimental group and a traditional class for the control group. A total of 13 class sessions were completed. The model of the experiment was a nested design with repeated measures. The dependent variables were positive affective experience, negative affective experience, class satisfaction, and language achievement. This study analyzed the data using factorial analysis, t-test, and repeated measures analysis of variance. The results showed that learners in the experimental group improved their positive experience during the treatment through statistically significant differences in pre-test and post-test scores; while the control group did not. The negative experience decreased at the end of the class in both groups. Although the mean differences were not statistically significant, the mean of the negative experience in the experimental group was lower than that in the control group. The class satisfaction was significantly different between the two groups. The experimental group improved language achievement on their final exam, while the control group’s mean decreased.

PURPOSES : Before-and-after studies of red light cameras were conducted with the aim of reducing the number of side right-angle collisions. Three different methods were used for the before-and-after studies, and the analysis results were compared. METHODS: This research used the naive before-and-after method, the comparison-group method, and the empirical Bayes method to study the effects of red light cameras on side-angle collisions. The results of the three before-and-after methods were compared and interpreted in terms of safety indications at signalized intersections. RESULTS: The research results showed that side right-angle collisions can be reduced by installing red light cameras at signalized intersections. All three methods guarantee safety improvements of 25~30% on average. With regard to the results of each method, the naive before-and-after method, the comparison-group method, and the empirical Bayes method showed safety improvements of 25.6%, 27.8%, and 29.7%, respectively. CONCLUSIONS: It was concluded that red light cameras are an effective countermeasure to improve intersection safety. In particular, by installing red light cameras, side right-angle collisions can be reduced by up to approximately 25~30%.

Therapy with appropriate antimicrobial agents is an important component in the management of patients with liver, biliary and pancreatic infection. Acute cholangitis and cholecystitis are common conditions that may result in progressively severe infection. Infectious complications, both pancreatic (infected necrosis) and extrapancreatic (pneumonia, cholangitis, bacteremia, urinary tract infections, and so on), are a major cause of morbidity and mortality in patients with acute pancreatitis. Antimicrobial agents appropriate for initial therapy (empirical therapy or presumptive therapy) for various grades of severity of infections should be used. Local antimicrobial susceptibility patterns should be considered for use.

PURPOSES: Safety consciousness can be the first factor to hinder the acceptance of design alternative, which moderates the applied design criteria in order to adapt the road to the natural terrain condition. METHODS : The method which enables to check the safety of design alternative by using design consistency concept is suggested. The method is based on the linked or interactive analysis between terrain and road alignment. Real design example is considered as a guide how to apply the method and the analysis result is discussed with the future research. RESULTS: Suggested method can be used for designers as a tool to review their design outputs can be safe as much as the original design. So, designers have the more objective judgement on their designs and have the confidence on their designs. CONCLUSIONS : The method is expected to be used as a tool to see the safety consciousness in an objective view, so any possible conflicts between designers and design-related personnels caused by the terrain-oriented design can be solved.

PURPOSES: Ambiguous decision on whether rural or urban area for road design can increase the construction cost and restrict the land use of surrounding area. However, administrative classification on rural and urban area is not directly related to road design because of this classification is not based on the engineering viewpoint, so method which can explain the road design context is required. METHODS: Method which enables to identify the area for road design is suggested based on the deceleration expected to be experienced by drivers who use the road section concerned. Deceleration rate corresponding to the area such as rural or urban suggested in Road Design Guideline is used as the criteria to identify the area by comparing this value with the estimated deceleration rate at the road section concerned. Speed profile method is utilized to derive the deceleration rate, and speed estimation way for reflecting both road geometry and intersection is suggested using stopping sight distance concept. RESULTS: The procedure of the method application is suggested, and the design example utilizing the method is provided. CONCLUSIONS : The method is expected to be used to identify the area for road design with engineering viewpoint, and design consistency among the roads with similar driving environment can be made.

곤충학 분야에서는 곤충 발생일 예측 등과 같은 phenology 연구에 기상자료를 필수적으로 사용하고 있다. 하지만 부정확한 발육영점온도와 같은 계산상의 문제와 기상관측자료지점과 곤충발생지점과의 차이, 기상관측센서의 설치, 관리, 측정값 오류 등과 같은 관측상의 문제가 예측결과의 정확도에 영향을 미친다. 본 자료에서는 기상관측센서와 관련된 문제점을 보완할 수 있는 방안을 소개하고자 한다. 국립농업과학원에서는 2009년 농업기상정보서비스(AMIS)를 구축하였으며, 현재까지 농업기상관측지점의 과거 및 현재 농업기상자료를 수요자에게 제공하고 있지만 대국민의 인식 부족으로 활용사례는 제한적이다. 국립농업과학원 농업기상정보서비스에 연결된 AWS는 논, 밭, 과수원과 같은 농경지에 2014년 3월 기준으로 147개 지점에 설치되어 있으며, 2014년 160개소, 2017년 200개소로 확대할 계획이다. 관측요소는 온도, 습도, 토양온도, 토양수분, 강수량, 풍향․풍속, 일사량, 이슬지속시간 등 9개의 필수농업기상요소가 측정되고 있으며, 각 기상요소는 매1분 단위로 측정되며, 매10분 단위로 자료 수집기에 저장되어 국립농업과학원 DB 서버에 CDMA방식을 통해서 전달되고 있다. 수집된 농업기상관측자료는 품질관리를 통해서 실시간으로 인터넷망(http://weather.rda.go.kr)을 통해 수요자에게 전달되고 있다. 농업기상정보서비스에서는 농업기상관측정보 뿐만 아니라 농업기후 지대별 기상․기후 비교자료, 응용기상정보(유효적산온도 등) 등을 생산하여 제공하고 있으며, 국지기후상세화, 작황예측 등의 기본 자료로도 활용되고 있다. 또한 고품질의 농업기상정보를 생산하기 위하여 농업기상관측센서를 정기적으로 점검하고 있다. 따라서 국립농업과학원 농업기상정보서비스에서 생산된 기상자료는 기상관측센서와 관련된 관측상의 문제점을 보완할 수 있는 방법으로 판단되며, 향후 곤충 phenology 연구 및 기후변화 영향평가 연구 등에 활용됨으로써 곤충학 연구의 질을 높일 수 있을 것으로 판단된다.

Spatial variations of a seismic wave are mainly wave passage and wave scattering. Wave passage effect is produced by changed characteristics of exciting seismic input motions applied to the bedrock. Modified input motions travel horizontally with time differences determined by apparent shear wave velocity of the bedrock. In this study, wave passage effect on the seismic response of a structure-soil system is investigated by modifying the finite element software of P3DASS (Pseudo 3-Dimensional Dynamic Analysis of a Structure-soil System) to apply inconsistent (time-delayed) seismic input motions along the soft soil–bedrock interface. Study results show that foundation size affected on the seismic response of a structure excited with inconsistent input motions in the lower period range below 0.5 seconds, and seismic responses of a structure were decreased considerably in the lower period range around 0.05 seconds due to the wave passage. Also, shear wave velocity of the bedrock affected on the seismic response of a structure in the lower period range below 0.3 seconds, with significant reduction of the seismic response for smaller shear wave velocity of the bedrock reaching approximately 20% for an apparent shear wave velocity of 1000m/s at a period of 0.05 seconds. Finally, it is concluded that wave passage effect reduces the seismic response of a structure in the lower period range when the bedrock under a soft soil is soft or the bedrock is located very deeply, and wave passage is beneficial for the seismic design of a short period structure like a nuclear container building or a stiff low-rise building.

PURPOSES : The lack of details of design guideline for zig-zag shaped section approaching central bus stop leads an traffic accident proneness. So, this study analysed the geometric elements of central bus stop area in terms of vehicle dynamics and suggested design alternatives. METHODS: The study analysed a dynamic behaviour of bus moving in and out of zig-zag shaped section using Auto-Turn under scenarios. Based upon dynamic analysis, the study found out the width of overtaking lane is the most influential factor for a safe moving at zig-zag alignment. RESULTS : The width of overtaking lane at design speed of 40, 50, and 60 km/h respectively was suggested given taper ratio of 1 to 10 required for Bus Rapid Transit (BRT), and the lane width is not wider than 4.0m which possibly makes two vehicles using the same lane. Also, the width of overtaking lane which mitigates the taper ratio was suggested with the same restriction about the maximum lane width. CONCLUSIONS: The results of the study can be used to prepare a design guideline on zig-zag shaped alignment of central bus exclusive lanes. The more stable moving is expected by applying the design alternatives suggested, therefore the lower rate of traffic crashes at the vicinity of central bus stops.

PURPOSES: This study aimed to measure the skid resistance of the sidewalk in order to find out the relationship between different surface types and skid resistance. By using British Pendulum Tester, skid resistance of sidewalk was measured in a wet after snow-melt, sludgy, and snowy conditions. METHODS : The skid resistance was measured on surfaces including Concrete Interlocking Block Paving, Colour Asphalt Pavement, Granite Block Paving, Manhole, and Tactile Paving for Visually Impaired. Five trials at each measurement were made, and the average and standard deviation were derived. RESULTS: The skid resistance measured in wet after snow-melt, sludgy, and snowy conditions for the various surface types are summarized and compared. Reduction rates of skid resistance of sludgy and snowy against wet after snow-melt are also analysed. The skid resistance variation between measurement points which mimic pedestrian route in study site are analysed to check out the consistency of the skid resistance along the sidewalk. CONCLUSIONS : The study concluded that the skid resistance of sidewalk surfaces varied depending on the surface types and weather conditions. Secondly, reduction rates of skid resistance according to weather changes are varied depending on the surface types, Thirdly, consistency of skid resistance along the pedestrian route is hardly acquired in the study site at least. So, future study on the consistency evaluation for skid resistance along sidewalk is strongly recommended.

총담관결석의 진단방법은 여러 가지가 있으며 크게 임상양상, 영상검사 및 내시경검사로 나눌 수 있다. 이 중에서 임상증상, 검사실 소견, 초음파검사 또는 복부전산화 단층촬영과 같은 기본 검사 결과를 바탕으로 총담관결석이 있을 가능성이 높은 군과 낮은 군으로 구별 혹은 층화하여 몇 개의 위험군으로 나누어 치료 방침 및 추가 검사를 시행한다. 저위험군에서는 환자가 담낭담석을 동반하여 담낭절제술이 필요하다면 내시경역행담췌관조영술을 시행하지 않고 바로 담낭절제술을 시행할 수 있다. 중등도 위험군에서는 총담관결석의 제거를 위한 내시경역행담췌관조영술이 필요한지를 알아보기 위하여 자기공명 담췌관조영술이나 내시경초음파검사의 추가 검사가 필요하다. 고위험군에서는 다른 추가 검사 없이 담석 제거 등의 치료를 할 수 있는 내시경역행담췌관조영술을 바로 시행할 수 있다.

총담관결석은 임상의들이 흔히 진료할 수 있는 질환으로 임상적으로 무증상, 복통, 급성 담도염, 급성 췌장염, 그리고 응급처치가 필요한 패혈성 쇼크까지 임상증상이 다양하게 나타난다. 따라서 이를 신속하게 진단하고 적절한 치료를 조기에 시행하는 것은 국민보건과 삶의 질 향상에 매우 중요하다. 혈액검사, 복부 초음파, 복부 CT, MRCP, 내시경초음파 등의 여러 가지 영상 의학적 방법으로 총담관결석을 진단할 수 있다. 또한 대부분의 총담관결석은 내시경역행담췌관조영술과 내시경유두괄약근절개술로 치료가 되고 있지만, 필요에 따라서는 담도내시경, 내시경유두큰풍선확장술, 복강경총담관탐색술, 개복술 등이 사용될 수 있다. 임상적인 증상, 총담관결석의 크기, 환자의 상태에 따라서 총담관결석 진단과 치료 방법의 선택이 다를 수 있다. 이에 대한췌담도학회에서는 총담관결석의 진단과 치료에 관한 미국과 영국의 진료지침을 수용 개작하여 진료가이드라인을 개발하여 국민보건향상에 도움을 주고자 하였다.

PURPOSES : This study aims to suggest the optimal spacing between speed humps which is placed at traffic calming areas including pedestrian priority zones, school zones, and residential areas. METHODS: The study measured the operating speed of vehicles passing through two successive humps by using laser gun in 0.2 seconds interval, and analysed the basic statistical characteristics of speeds data to have an insight on the relationship between spacing and speed. Assumption was made to derive the maximum spacing within which two successive humps influence each other. RESULTS: The statistically significant model explaining the relationship between spacing and 85th percentile speed of vehicles was derived as well as the maximum spacing maintained in order to take the benefits of successive installation of humps. CONCLUSIONS: Spacing of 20 meters was suggested to achieve the widely accepted target speed of 30 km/h in traffic calming zone, and spacing of 70 meters was suggested as a maximum spacing. The comparison across the studies were made and empirical reasoning the difference of results between studies was discussed as well as the future studies.

PURPOSES : The lack of details of guidelines on how to install the Chicane for traffic calming leads the practical difference across the calming areas, so the benefits expected from these facilities are not hardly observed. In this context, this study analysed the relationship between the geometric design alternatives of Chicane with the dynamic behaviour of vehicles in terms of speed and trajectory. METHODS : The study analysed vehicle dynamic behaviour using dynamic analysis program Auto-Turn under various geometric conditions of Chicane. RESULTS : This study suggested the design alternatives of Chicane using terms such as "longitudinal displacement value", "lateral displacement value", etc. which are defined in the study. The suggested combination set is fulfilling the desired or target speed of vehicles and clearance between vehicle and roadside at the same time. CONCLUSIONS : The results from this study can be applied to install Chicane corresponding to the local condition where target speed is 30km/h. The study showed the design alternatives of chicane corresponding to the given road cross-sectional design and clearance to roadside for passenger cars and light truck respectively.

PURPOSES : Two-lane highways have one lane in each direction, and lane changing and passing maneuvers take place in the opposing lane depending on the availability of passing sight distance. 2001 Korea Highway Capacity Manual (KHCM) is classified into two classes of two-lane highways (Type I, II), and average travel speed and time-delayed rate are used as measures of effectiveness (MOEs). However, since existing two-lane highways have both uninterrupted and interrupted traffic flow-system elements, a variety of free-flow speeds exhibits in two-lane highways. In addition, it is necessary to check if the linear-relationship between volumes and time-delayed rate is appropriate. Then, this study is to reestablish the relationship between average travel speed, time-delayed rate, and flow. METHODS : TWOPAS model was selected to conduct this study, and the free-flow speeds of passenger cars and the percentage of following vehicles observed in two-lane highways were applied to the model as the input. The revised relationships were developed from the computer simulation. RESULTS : In the revised average travel speed vs. flow relationship, the free-flow speed of 90km/h and 70km/h were added. It shows that the relationship between time delayed-rate and flow appeared to be appropriate with the log-function form and that there was no difference in time-delayed rate between the free flow speeds. In addition to revise the relationships, the speed prediction model and the time-delayed rate prediction model were also developed. CONCLUSIONS : The revised relationships between average travel speed, time-delayed rate, and flow would be useful in estimating the Level of Service(LOS) of a two-lane highway.