ACTUATOR 2014 참관기

손정우 한국소음진동공학회 2015 소음 진동 Vol.25 No.1

과학글쓰기를 통한 과학영재학생들의 과학적 사고력과 창의적 문제해결력 연구

손정우 한국과학영재교육학회 2009 과학영재교육 Vol.1 No.3

최근 들어 과학글쓰기 교수법에 대한 관심이 높아지고 있다. 이러한 시대 추세에 따라 글쓰기지도를 위한 과학영재학생들의 초인지 수준을 점검하였다. 그리고 과학적 사고력과 창의적 문제해결력이 요구되는 과학 글쓰기에 어떤 특성을 보이는 지 분석하였다. 그 결과 과학글쓰기를 통해 본과학적 사고력은 문항의 성격에 따라 달라지지만, 대체로 수업에 적극적인 초등학생들이 높게 나타났다. 그리고 과학글쓰기를 통해 본 문제해결력은 탐구 경험이 많은 중학생들이 높게 나타났다. 이러한 결과로부터, 수업의 적극성이 과학적 사고력에 관여하고, 탐구기능의 숙달여부가 창의적 문제해결력에 관여함을 알 수 있었다.

이동형 차폐기구(portable radiation protector)에 의한 시술자의 산란선 차폐 정도와 유용성의 분석과 고찰

손정우,김재광,오창섭,이우상,김대용,송창욱 대한인터벤션영상기술학회 2016 대한인터벤션영상기술학회지 Vol.19 No.1

서론: 시술이 시행되고 있는 동안 시술실 안에서 환자를 관찰하고 돌봐야 하는 의료인은 table의 head side에 위치하는 경우가 많다. 또한 간 조직검사(transjugula liver biopsy)나 경목정맥간내문맥간정맥단락술(tips)등의 시술은 table의 head side에서 장시간 시술이 이루어지고 그 동안 시술자가 받는 피폭선량도 증가하게 된다. 따라서 이번 실험에서는 table의 head side에 이동형 차폐기구를 사용했을 때 산란선량의 변화를 알아보고 그 유용성을 평가해보고자 한다. 대상 및 방법: SIEMENS Artis ZEE Ceiling type장비를 이용하여 장비의 Direct position button 기능을 이용하여 SDD(Source Detector Distance) 120cm, STD(Source Table Distance) 60cm, TDD(Table Detector Distance) 60cm, Zoom size 48cm 조사야에서 phantom를 조사야 전면에 설치 후 이동형 차폐기구를 table의 head side에 위치했을 때와 그렇지 않았을 때, 그리고 X-ray tube를 감싸고 있을 때(n자형)와 시술자만을 보호하기 위해서 시술자를 감싸고 있을 때(u자형)로 나누어서 X-ray tube의 중심축에서부터 0°, ±30°, ±60°, 90°의 간격으로 거리 100cm, 150cm에서 높이 1m, 1.5m로 각각 5회에 걸쳐서 30초간 산란선량을 측정하고 그 평균을 나타내었다. 이때 조사량의 조건은 혈관조영실에서 가장 많이 사용하는 Celiac의 조건인 73Kvp, 100mA, 3.8ms, 5.7p/s로 고정하였다. 결과: 이동형 차폐기구를 사용했을 때는 사용하지 않은 것에 비해서 산란선량이 90%정도 감소되는 것을 알 수 있다. 이동형 차폐기구를 n자형으로 사용했을 때와 u자형으로 사용했을 때를 서로 비교하면 높이 1m에서는 u자형은 0°에서만 산란선량의 감소를 보이는 것에 비해서 n자형에서는 ±30°까지 산란선량의 감소를 보이고 있다.

순대의 文獻的 考察

孫禎佑 배화여자대학 1998 培花論叢 Vol.16-17 No.-

The types, materials used and cooking methods of Soondae, which is one of the most popular traditional sausage-type food of Korea, are investigated by means of the survey of literatures published between 1600 and 1991. The first mention on Soondae can be found in ‘Chubangmoon’ published in the 1600's, in which large intestines, blood and flour are used for the major materials. The name of ‘Soodae’ was first introduced in ‘Sieuichunseo’ published in the 1800's which shows that the porcine intestines and blood were used for Soondae like present time. The package material classifies Soondae into two types, namely Meat Soondae using cattle intestines or porcine intestines and Fish Soondae using air bladder, cuttle fish or wall-eye pollark. The varieties of materials and cooking methods of each region are also summarised.

Active Recovery of Vibration Characteristics for Delaminated Composite Structure Using Piezoelectric Actuator

손정우,김흥수 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.

In this paper, an active control algorithm was adopted, in order to recover the vibration characteristics of a delaminated compositestructure, and control performances were numerically investigated. Delamination of the laminated composite structure was modeled,using the improved layerwise theory. Higher order electric potential was used to describe the electro-mechanical coupling of apiezoelectric actuator. Dynamic equations of motion were derived, using a finite element scheme. Mode shapes and correspondingnatural frequencies for healthy and damaged structures were identified. After implementing an active control algorithm in the systemmodel, vibration characteristics of the controlled composite structure were compared to those of healthy and damaged compositestructures. Vibration characteristics of the delaminated composite structure were effectively recovered to those of the healthy structure,and structural performances were also restored to those of the healthy structure.

과학중점학교 교수학습의 실제에 대한 만족도와 이에 따른 개선 방향

손정우,이봉우,최재혁,김종희,박종석,서혜애,심규철,이기영,이선경 한국물리학회 2013 새물리 Vol.63 No.4

The aims of this study were to investigate to what extents teaching and learning practices at science core schools were satisfactory and to propose effective directions for school-based improvement. To these ends, questionnaires to investigate to what extents the schools' curriculum, teaching and learning practices, and effectiveness were satisfactory and to form opinions on school improvement were developed and administered to 4,504 students, 4,445parents, and 851 mathematics and science teachers at 50 science core schools at the beginning of fall semester 2011. First, students,parents and mathematics and science teachers were found to show high levels of satisfaction with the teaching and learning practices at science core schools. Also, students of science core programs were found to show higher satisfaction with teaching and learning practices than students of natural science/technology programs and students of humanity programs. There was a tendency to shift from teacher-centered to student-centered practices. Demands for varied teaching strategies for quality learning were expressed by students and parents. 본 연구의 목적은 과학중점학교의 교수학습에 대한 만족도를조사$\cdot$분석하고, 그 결과에 근거하여 보다 효과적인 발전 방안을제시하는 것이다. 이를 위해서 전국 50개 과학중점학교의 1, 2학년재학생 4,504명, 학부모 4,445명, 수학 및 과학교사 851명을 대상으로과학중점학교의 교육과정 및 수업, 과학중점학교의 효과 및 개선방안등에 대한 설문조사를 실시하였다. 주요 연구 결과는 다음과 같다. 첫째,과학중점학교의 교수학습에 대해 교사, 학부모, 학생의 순으로 높은만족도를 나타내었다. 둘째, 학생들은 과학중점과정, 자연과정,인문사회과정 학생들의 순서로 높은 만족도를 나타내었다. 인문사회과정학생들의 만족도는 평균 이하로 낮았다. 원인분석과 개선방향의 탐색이요구되었다. 셋째, 과학중점학교의 수업은 교사 중심에서 학생 중심으로변화하고 있었다. 넷째, 학생들은 교수학습방법을 다양화하여 수업의질을 향상시킬 것을 요구하였다.

Medical Care Expenditure in Suicides From Non-illness-related Causes

손정우,조재림,문기태,서미나,하경화,신동천,김창수,정상혁 대한예방의학회 2014 Journal of Preventive Medicine and Public Health Vol.47 No.6

Objectives: Several epidemiological studies on medical care utilization prior to suicide have considered the motivation of suicide, but focused on the influence of physical illnesses. Medical care expenditure in suicide completers with non-illness-related causes has not been investigated. Methods: Suicides motivated by non-illness-related factors were identified using the investigator’s note from the National Police Agency, which was then linked to the Health Insurance Review and Assessment data. We investigated the medical care expenditures of cases one year prior to committing suicide and conducted a case-control study using conditional logistic regression analysis after adjusting for age, gender, area of residence, and socioeconomic status. Results: Among the 4515 suicides motivated by non-illness-related causes, medical care expenditures increased in only the last 3 months prior to suicide in the adolescent group. In the younger group, the proportion of total medical expenditure for external injurieswas higher than that in the older groups. Conditional logistic regression analysis showed significant associations with being a suicidecompleter and having a rural residence, low socioeconomic status, and high medical care expenditure. After stratification into the four age groups, a significant positive association with medical care expenditures and being a suicide completer was found in the adolescent and young adult groups, but no significant results were found in the elderly groups for both men and women. Conclusions: Younger adults who committed suicide motivated by non-illness-related causes had a higher proportion of external injuriesand more medical care expenditures than their controls did. This reinforces the notion that suicide prevention strategies for young people with suicidal risk factors are needed.

A Cost Sensitive Part-of-Speech Tagging: Differentiating Serious Errors from Minor Errors

손정우,노태길,박성배 한국지능시스템학회 2012 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.12 No.1

All types of part-of-speech (POS) tagging errors have been equally treated by existing taggers. However, the errors are not equally important, since some errors affect the performance of subsequent natural language processing seriously while others do not. This paper aims to minimize these serious errors while retaining the overall performance of POS tagging. Two gradient loss functions are proposed to reflect the different types of errors. They are designed to assign a larger cost for serious errors and a smaller cost for minor errors. Through a series of experiments, it is shown that the classifier trained with the proposed loss functions not only reduces serious errors but also achieves slightly higher accuracy than ordinary classifiers.

학문적 요구와 국어교육

손정우 한국어교육학회 2014 한국어교육학회 학술발표논문집 Vol.2014 No.-

신경미학이란 무엇인가? : 정신의학에서의 새로운 패러다임

손정우,이승복,정우현,지상현,정성훈 대한신경정신의학회 2013 신경정신의학 Vol.52 No.1

Neuroaesthetics is an area of research on the essence of aesthetic experience according to the neurobiological perspective. The purpose of this article is to introduce both the important results from some studies based on neuroaesthetics and some neuroaesthetic reports in specific psychiatric disease. Aesthetic experience is thought to be a series of cognitive and affective processes for pursuing aesthetic judgment and aesthetic emotion. According to the present neuroaesthetic studies, the important domains are reward system, embodiment, aesthetic perspective in contrast with practical perspective, sublime, and so on. The neuroaesthetic approach to specific psychiatric disease is just beginning; however, case studies on the sudden appearance of artistic talents in neuropsychiatric patients have been frequently reported. We expect that neuroaesthetics is likely to continue to contribute new knowledge regarding the ultimate causes of various psychiatric diseases and the creativity of many psychiatric patients.