• Journal of the Institute of Electronics Engineers of Korea SP
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• 제41권5호
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• pp.13-22
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• 2004

Because video sequence consists of dynamic objects in nature, the object motion in video is an effective feature in describing the contents of video sequence and motion feature plays an important role in video retrieval. In this paper, we propose a method that converts motion vectors (MVs) to a uniform set on MPEG coded domain, independent of the frame type and the direction of prediction, and utilizes these normalized MVs (N-MVs) as motion descriptor to understand video contents. We describe a frame-type independent representation of the various types of frames presented in an MPEG video in which all frames can be considered equivalently, without full-decoding. In the experiments, we show that the proposed method is better than the conventional one in terms of performance.

• Journal of Radiation Protection and Research
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• 제2권1호
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• pp.38-46
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• 1977

오늘날 에너지 공급(供給)을 위한 새로운 해결책(解決策)의 하나로서 등장(登場)한 원자력발전소(原子力發電所), 재래(在來)의 X선(線) 진료(診療) 이외(以外)에 의학계(醫學界)에 도입(導入)된 방사선원(放射線源), 그리고 각종(各種) 전자생산품(電子生産品) 등(等)의 증가현상(增加現象)은 방사선(放射線) 방어(防禦) 문제(問題)와 관련(關聯)하여 보건의학분야(保健醫學分野)에서 종사(從事)하는 사람들에게 지대(至大)한 관심(關心)거리가 되고있다. 그래서, 우선(于先) 방사선(放射線)에 관(關)한 사항(事項)중에서 가장 기초(基礎)가되는 방사선량계측(放射線量計測)에 있어서 그 양(量)과 단위(單位) 문제(問題)가 체계적(體系的)으로 서술(敍述)되었다. 즉(卽) 방사선(放射線)이 인체(人體)에 끼칠 수 있는 해(害)로운 영향(影響)에 그 주안점(主眼點)을 두어 조사선량(照射線量), 흡수선량(吸收線量), 선량당량(線量當量), 그리고 그들의 관계(關係) 및 방사능등(放射能等)에 관(關)하여 토론(討論)되었다. 특(特)히 조사선량률(放射線量率), X는 비(比)감마선선상수(線常數), ($\Gamma$)를 포함(包含)하는 함수(函數)로 표현(表現)되었고, 끝으로 인체(人體) 내부(內部)에 축적(蓄積)된 방사능(放射能)으로부터의 영향(影響)에 의(依)한 이른바 생물학적효과(生物學的效果) (Somatic or Genetic Effects)와 관련(關聯)되는 내부흡수선량율(內部吸收線量率)은 평형흡수선량상수(平衡吸收線量常數)($\Delta_i$)와 흡수율($F_i$)를 포함(包含)하는 수학적(數學的) 모델로 소개(紹介)되었다. 한편 방사능(放射能)은 방사선원(放射線源) 물질(物質)의 자연붕괴율(自然崩壞率)이므로 다른 방사선량(放射線量)들 즉(卽) 조사선량(照射線量), 흡수선량(吸收線量)그리고 선량당량(線量當量)과는 별도(別途)로 취급(取扱)하였음을 부언(附言)한다.

• The Mathematical Education
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• 제56권1호
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• pp.63-80
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• 2017

By analysing the examination papers from third grade high school students, we classified the errors occurred in the problem solving process of high school 'Geometry and Vectors' into several types. There are five main types - (A)Insufficient Content Knowledge, (B)Wrong Method, (C)Logical Invalidity, (D)Unskilled Expression and (E)Interference.. Type A and B lead to an incorrect answer, and type C and D cannot be distinguished by multiple-choice or closed answer questions. Some of these types are classified into subtypes - (B1)Incompletion, (B2)Omitted Condition, (B3)Incorrect Calculation, (C1)Non-reasoning, (C2)Insufficient Reasoning, (C3)Illogical Process, (D1)Arbitrary Symbol, (D2)Using a Character Without Explanation, (D3) Visual Dependence, (D4)Symbol Incorrectly Used, (D5)Ambiguous Expression. Based on the these types of errors, answers of each problem was analysed in detail, and proper ways to correct or prevent these errors were suggested case by case. When problems that were used in the periodical test were given again in descriptive forms, 67% of the students tried to answer, and 14% described flawlessly, despite that the percentage of correct answers were higher than 40% when given in multiple-choice form. 34% of the students who tried to answer have failed to have logical validity. 37% of the students who tried to answer didn't have enough skill to express. In lessons on curves of secondary degree, teachers should be aware of several issues. Students are easily confused between 'focus' and 'vertex', and between 'components of a vector' and 'coordinates of a point'. Students often use an undefined expression when mentioning a parallel translation. When using a character, students have to make sure to define it precisely, to prevent the students from making errors and to make them express in correct ways.

• Journal of the Korean Chemical Society
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• 제45권4호
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• pp.370-376
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• 2001

In this study, high school students' problem-solving strategy-performing ability was measured by an essay-type test. The relationship between students' logical thinking ability and strategy-performing ability was also investigated. Four classes (N=187) were selected from two high schools in Seoul, and the strategy performance ability test and the Group Assessment of Logical Thinking (GALT) were administered. Evaluation scheme for strategy-performing ability consists of 7 subcategories - understanding given of problems, recalling related law, setting up subgoals, deriving physical quantities, logical progress, mathematical execution, and reviewing. The intercoder agreement for scaling was .92, which indicated substantial strength of agreement. The results revealed that students' ability of understanding given of problems and mathematical execution was relatively high. However, their ability of setting up subgoals and reviewing was very low. The total scores of the strategy performance ability test and all of the scores of each subcategory were significantly correlated with the GALT scores.

• Journal of the Korean Chemical Society
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• 제59권6호
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• pp.499-507
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• 2015

The purpose of this study is to investigate middle school students’ understanding of ionic equation. Two hundreds and nineteen middle school students were participated in the study. After six class hours of learning ‘electrolyte and ion’ unit, instrument was implemented to evaluate students’ understanding of ionic process and ability to write ionic equation. We analyzed the influence of characteristics of ionic compounds on correct answer rate. In addition, knowledge state of students required for writing ionic equation was analyzed. The results were as follows: First, ionic compounds tested were categorized into six groups. The correct answer rate was different depending on the characteristics of each group. Second, knowledge state required for writing ionic equation was structured. Based on results some suggestion were made to develope effective learning strategy for understanding ionic equation.

• Journal of the Institute of Electronics and Information Engineers
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• 제49권11호
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• pp.64-73
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• 2012

In this paper, we propose a method to search for identical videos. The proposed method is spatio-temporal group feature fingerprinting. Frame of video is extracted from fixed rate method and is partitioned into vertical group and horizontal group. Descriptor is made of each group feature that is extracted from binary fingerprinting. Next, use descriptor of original video to build a two type of fingerprinting database and matching with query video. To efficient and effective video copy detection, method have high robustness, independence, matching speed. In proposed method, group feature have high robustness and independence in variable modification of video. Building a original fingerprinting database is able to fast matching with query video. The proposed method shows performance improvement in variable modifications in comparison to the existing methods. Especially, very singular performance in speed improvement is great advantage of this paper.

• Journal of the Korea Academia-Industrial cooperation Society
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• 제21권1호
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• pp.14-19
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• 2020

This paper proposes a precise drone-positioning technique using a differential global positioning system (DGPS). The proposed system consists of a reference station for error correction data production, and a mobile station (a drone), which is the target for real-time positioning. The precise coordinates of the reference station were acquired by post-processing of received satellite data together with the reference station location data provided by government infrastructure. For the system's implementation, low-cost commercial GPS receivers were used. Furthermore, a Zigbee transmitter/receiver pair was used to wirelessly send control signals and error correction data, making the whole system affordable for personal use. To validate the system, a drone-tracking experiment was conducted. The results show that the average real-time position error is less than 0.8 m.

• Journal of Korean Academy of Nursing Administration
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• 제19권2호
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• pp.254-264
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• 2013

연구목적: 본 연구는 간호사의 임상경력단계에 따른 경력개발제도에 대한 간호사의 인식을 파악하고, 경력개발제도에 대한 인식, 전문직 자아개념과 임파워먼트와의 관계를 파악하여 간호사 경력개발제도의 개선의 근거 마련하고 전문직 자아개념과 임파워먼트의 증대 방안 모색을 통한 인적자원관리에 기여하고자 시도 된 서술적 상관관계 연구이다. 연구방법: 서울시 소재 일 상급종합병원에서 근무하는 중환자실, 수술실, 응급실 간호사 162명을 대상으로 설문지를 이용하여 경력개발제도에 대한 인식, 전문직 자아개념, 임파워먼트를 측정하였다. 수집된 자료는 SPSS WIN 18.0 프로그램을 활용하여 서술적 통계, t-test, ANOVA, Pearson's Correlation Coefficient, Multiple linear Regression을 시행하였다. 연구결과: 간호사의 임상경력단계에 따른 경력개발제도에 대한 인식은 전임 2 간호사가 신입 간호사, 일반 간호사, 전임 1 간호사보다 높은 인식을 가지고 있었다. 경력개발제도에 대한 인식과 전문직 자아개념, 임파워먼트에는 통계적으로 유의한 양의 상관관계가 있었다. 다중회귀분석을 실시한 결과 경력개발제도에 대한 전반적 이해, 경력개발제도에 대한 기대효과, 최종학력, 임상경력단계가 전문직 자아개념의 42% 설명하는 것으로 나타났고, 경력개발제도에 대한 전반적 이해, 전문적 활동 참여에 대한 인식, 경력개발제도에 대한 기대효과, 임상경력단계가 임파워먼트를 42% 설명하였다. 결론: 전문직 자아개념과 임파워먼트에 영향을 미친 변수로 나타난 경력개발제도에 대한 인식을 향상시킬 수 있는 방안을 개발하여 적용을 통한 효과 검증이 요구되며, 간호 관리자들의 제도 운영과 관련된 장애요인의 파악 및 세심한 제도 개선이 필요하다.

• Journal of the Korea Academia-Industrial cooperation Society
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• 제15권3호
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• pp.1576-1583
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• 2014

This study was to investigate the relationship between emotional intelligence and adjustment of college life as well as the effect of emotional intelligence on adjustment of college life in first year nursing college students. The participants were 104 first year nursing college students. Data was collected from June 11 to 13, 2012 and analyzed using descriptive statistics, pearson correlation coefficients and multiple regression. The mean scores for emotional intelligence 3.59 and adjustment of college life 3.01 were above average. A significant and positive correlation was found between emotional intelligence and adjustment of college life. The emotional intelligence predicted adjustment of college life. The strongest predictor on adjustment of college life was emotional recognition and next predictors were in order of empathy and emotional expression among the sub-factors of emotional intelligence. The results of this study suggest that it needs to develop the program for improving the emotional intelligence for better adjustment of college life in college nursing students.

• Journal of the Korea Academia-Industrial cooperation Society
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• 제14권4호
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• pp.1774-1780
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• 2013

The purpose of this study was to investigate the relationship between diabetic neuropathy, and glycemic control, self-management in type 2 diabetes mellitus(DM) patients. This was a cross sectional descriptive study and data were collected between May 10 and 31, 2011 using a questionnaire and medical record. The participants were 108 with DM who were treated at the endocrine medical outpatient department. The data were analyzed Pearson's correlation with SPSS WIN program. The mean scores of neuropathic pain and self-management were $9.3{\pm}1.4$(Range 0-14.64) and $5.40{\pm}0.76$(Range 1-7), respectively. There were 33.3% of the patients whose HbA1c levels are higher than 7.5%. Neuropathic pain was positively correlated with glycemic control(r=.18, p=.035), and was negatively correlated with self-management(r=-.19, p=.023).