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곽동기,손태정 부산여자대학교 교육과학연구소 1998 교육과학연구 Vol.- No.3
When learners acquire English as a second language or a foreign language, there are many pronunciation errors. In the contrastive analysis, the errors come from the difference of consonant and vowel system, the difference of syllable structures, and the difference of phonological rules. In this thesis the way of error analysis is carried out on the basis of Optimality Theory. In Optimality Theory, rules or constraints are violable and ranked, then the candidate which can best-satisfy the constraint hierarchy is selected. The optimal form, the best-satisfying candidate, for Korean learners may be an incorrect pronunciation for native speakers. Korean phonological rule hierarchy intervene English phonological rule hierarchy. The disturbance of rule hierarchy is the cause of pronunciation errors. Errors which are related the Cluster Condition, Nasalization, Vocalization, Tensification, Palatalization, Aspiration, and Hiatus Avoidance are analyzed. The larger part of analysis is focused on the Cluster Condition that prevents consonant cluster on a syllable onset and coda. Korean learners pronounce consonant cluster with ??-epenthesis. For reduction of pronunciation errors related with consonant cluster, I recommend to use fifteen century consonant cluster to English teachers. In case of errors related with Nasalization, Vocalization, Tensification, Korean learners lose nasality, and vocality feature In Palatalization, they insert 'n' and in Hiatus Avoidance they insert 'y' when they pronounce. In Aspiration they lose 'h' and add aspiration feature to the neighboring segment. And in this thesis, the replacement of some phonemes are not explained such as replacing /??/ with /우/ , /??/ with /이/, /??/ with /ㅅ/, /??/ with /ㄷ/.
내외부 3층 피복 수지파형강관의 현장적용성에 관한 실험적 연구
정지승,손태정 한국복합신소재구조학회 2018 복합신소재구조학회논문집 Vol.9 No.1
As the corrugated steel pipes has many advantages to compensate for the shortcomings of the concrete fume pipes, it has been widely used for culverts and drain trenches. However, when corrugated steel pipes used as a sewage pipe or in an environment exposed to sea water, corrosion can cause problems and degradation of the function of pipe. So, Composite Corrugated Steel Pipe(CCSP) coated with three layers were developed to compensate for the shortcomings and improve performance of corrugated steel pipes. The composite material used in fabrication of the CCSP consists of a three layer polymer protective coating on both sides of a steel sheet core. To verify the field application of the CCSP, a test was conducted on the resistance of the strain, stability of connections, water flow performance and durability to determine whether they meet KS quality and various design standards.
해안가에 매설된 내외부 3층 피복 수지파형강관의 장기재령 내구성에 관한 연구
정지승,손태정 한국복합신소재구조학회 2018 복합신소재구조학회논문집 Vol.9 No.3
콘크리트관은 하수관으로 널리 쓰이지만, 중량이 무거워 취급이 곤란한 단점이 있다. 또한 하수 및 해수 지역에 매설될 경우 황산수소(H2S)와 염화물에 의한 화학적 침식 등으로 인해 균열, 단면 감소 등 각종 열화현상이 발생하게 되어 파형강관을 대신하여 사용하지만 시공특성상 파손이 생기거나 매설지역에 부등침하가 존재하거나 과도한 외부압력이 작용할 경우 누수 또는 파손이 발생하여 관거로서의 기능이 저하될 우려가 있다. 이에 본 논문에서는 3겹으로 코팅된 수지파형강관(CCSP)을 파형강관 대신 하수관에 적용하기 위한 연구를 수행하였으며 우선 CCSP를 화학약품에 침지한 후 마모율 및 중량감소 등을 통해 화학저항성을 알아보았다. 특히 해안가에 시공될 경우 장기재령 내구성능을 확인하기 위해 부산 감만항 인근에 수지파형강관을 매설한 후 재령 10년 및 15년이 경과한 시점에 피복부착력을 확인하기 위해 염수분무, 핀홀, 음극박리시험을 실시하였으며 외압에 대한 저항성을 알아보기 위해 재하시험을 실시하였으며 그 결과 모든 항목에서 KS품질 기준을 만족하고 관거로서의 소요성능을 확보하고 있어 장기재령 내구성을 확보하고 있음을 확인하였다. The concrete pipe is widely used as a sewage pipe, but it is difficult to handle and construct by its heavy weight. If buried in sewage and seawater areas, deterioration occurs due to erosion by hydrogen sulfate (H2S) and chloride, and reduction of cross section due to cracks, delamination, extention, etc. A Corrugated Steel Pipe coated with PE has been widely used to replace the concrete pipe, but water leaks were occurd where the connection is weak against external pressure. In this paper, research was conducted to apply Composite Corrugated Steel Pipe(CCSP) coated with three layers to sewage pipes instead of Corrugated Steel Pipe. The abrasion volume ratio and chemical resistance test were performed for check the quality of CCSP. To check the performance of longterm durability of CCSP buried at seashore, various of experiments such as salt spray, pinhall, adherence and loading test were conducted
YOLO-Pose와 Repetition Network을 이용한 AI기반 심폐소생술 훈련 시스템 개발
김선영,정현웅,김홍주,손태정,최진혁,유길상 국제차세대융합기술학회 2024 차세대융합기술학회논문지 Vol.8 No.3
최근 심장질환으로 인한 사망률 증가로 심정지 환자의 생존율을 높이는 심폐소생술 훈련의 중요성이 대 두되고 있다. 본 논문에서는 YOLOv8n-Pose와 RepNet을 활용하여 심폐소생술의 적절한 흉부압박 자세와 속도를 피드백해 주는 교육 시스템을 제안하였다. 자세 교정을 위해 사람의 자세를 추정할 수 있는 YOLOv8n-Pose를 사 용하였으며, 성능 향상을 목적으로 흉부압박 이미지 데이터 수집 과정을 거쳐 파인튜닝을 수행하였다. 흉부압박 속도는 반복적인 동작의 횟수는 RepNet을 통해 판단하였다. 판정된 자세와 박자가 올바르지 않을 때 자막과 음 성, 두 가지 방식으로 피드백을 제공하도록 하였다. 제안한 시스템은 심폐소생술 훈련 현장에서 학습자가 스스로 자가 학습을 하는데 활용될 수 있을 것으로 기대한다. With the increasing mortality rate due to cardiac diseases, the significance of cardiopulmonary resuscitation (CPR) training to enhance the survival rates of cardiac arrest patients has become more pronounced. This paper proposes an educational system that provides feedback on the proper chest compression posture and rate during CPR, utilizing YOLOv8n-Pose for posture estimation and RepNet for monitoring compression frequency. The YOLOv8n-Pose, capable of human pose estimation, was employed for posture correction, and fine-tuning was conducted following the collection of chest compression image data to improve performance. The RepNet, which counts the number of repetitive motions, was used to assess the chest compression rate. Feedback on the evaluated posture and rhythm was provided in two forms, subtitles and voice, whenever they were identified as incorrect. The proposed system is anticipated to be utilized for self-learning by learners in CPR training settings, enabling them to independently improve their skills
대구지역 신축학교 실내공기 중 카보닐화합물의 농도 특성 평가
황윤정,박희선,장성일,노기철,손태정,한정욱,배기수,최임조 한국대기환경학회 2006 한국대기환경학회지 Vol.22 No.6
The study on school indoor air quality was carried out at classrooms, computer-rooms, laboratories and play-2004 and during the summer time from June to July 2005. The sampling was conducted under the general schoolcondition without any articial intervention such as the sealing, ventilating or heating at indoor environments. Theconcentrations of formaldehyde at all types of indoor environments were lower than air quality standard of 120g/m3 ~ 6.1 times higher thanthose at outdoors. From the comparison between two year and one year old schools after construction, the concen-trations of formaldehyde in two year old school were 30~ 38% lower than those in one year old school measured atclassrooms and laboratories.