브이월드 데스크톱을 위한 대용량 공간정보 데이터 지원 방안 연구

강지훈,김현덕,김정옥,Kang, Ji-Hun,Kim, Hyeon-Deok,Kim, Jung-Ok 한국국토정보공사 공간정보연구원 2015 지적과 국토정보 Vol.45 No.1

최근 IT기술의 발달로 데이터의 양이 급증함에 따라 대용량 데이터를 다루는 빅 데이터 시대가 도래하게 되었다. 다양하고 방대한 빅데이터 를 활용하기 위해서는 대용량 데이터 처리 기술을 필요로 하는데, 이러한 흐름에 따라 공간정보 분야에서도 대용량의 공간정보 데이터 서비스 기술이 요구되고 있다. 따라서 본 연구에서는 국외의 대표적인 공간정보 데이터 서비스 기술을 살펴본 후, 국내의 대표적인 지도 소프트웨어인 브이월드 데스크톱에 적용 가능한 KML 포맷의 대용량 데이터 처리 기술을 개발하였다. 개발된 분할 방법과 도구를 검증하기 위해 대용량의 KML 데이터를 이용하여 테스트를 진행하였고, 인덱스 파일과 분할 파일들이 생성되어 브이월드 데스크톱에서 가시화 되었다. Recently, as the amount of data increases rapidly, the development of IT technology entered the 'Big Data' era, dealing with large-volume of data at once. In the spatial field, a spatial data service technology is required to use that various and big amount of data. In this study, firstly, we explained the technology of typical spatial information data services abroad, and then we have developed large KML data processing techniques those can be applied as KML format to VWorld desktop. The test was conducted using a large KML data in order to verify the development KML partitioned methods and tools. As a result, the index file and the divided files are produced and it was visible in VWorld desktop.

공군사관생도의 자기평가에서 나타나는 자기착각

강지훈 ( Kang Ji-hun ),김현주 ( Kim Hyeon-ju ) 한국체육대학교 체육과학연구소 2020 스포츠사이언스 Vol.38 No.1

The present study investigated the self-illusion of objective assessment through the operationally defined self-assessment and self-scale of the cadets of the Korea Air Force Academy (KAFA) to determine self-illusion observed in the physical self-concept. Data were collected from 38 cadets using a questionnaire on physical self-concept, which was revised based on previous studies of self-assessment, self-illusion, and physical self-concept, and statistical analysis was performed for descriptive statistics, and paired t-test using SPSS 21.0 and Excel 2013 to investigate differences in perception. The results were as follows: First, five and six points were the most frequent scores, and the self-assessment of the KAFA cadets was found to reflect self-enhancement bias. Second, statistically significant differences were found for physical appearance, physical activity, self-esteem, and overall body in self-assessment and objective assessment, but differences in sport competence, body fat, health, flexibility, endurance, and muscle strength were statistically insignificant. Third, the self-assessment results of KAFA cadets based on physical self-concept generally reflected self-enhancement bias, but they reflected self-abasement bias in sport competence. We expect that the present study will provide an opportunity to understand the flow of self-illusion of assessment indices related to physical education in the education of the cadets of the KAFA, which is oriented to the whole person, and interest in attribution based on assessment in the future.

초등 예비교사들의 SSI 토론활동 중 지식의 협력적 과정에서 나타나는 저항성 및 학습 유형 분석

강지훈(Ji-Hun Kang),천재순(Jaesun Chun) 학습자중심교과교육학회 2018 학습자중심교과교육연구 Vol.18 No.16

본 연구에서는 초등 예비교사들을 대상으로 하여 SSI 토론활동을 실시하였고, 이를 통해 나타나는 담화의 특성으로서 저항성과 학습의 유형에 대해 분석하였다. 연구 참여자는 교원양성대학에 재학 중인 초등교육 전공의 초등 예비교사 66명을 대상으로 하였다. 본 연구에서 사용한 SSI 토론활동의 주제는 모두 생명 영역으로 한정하였고, 2017년 1학기 동안 총 5회의 토론활동 수업을 실시하였다. 수집한 자료는 소집단 내 토론활동의 녹화 및 녹음을 통한 전사 자료, 학생들의 개인 활동지, 조별 활동지, 토론활동 후 설문지이며, 자료 수집의 신뢰도를 확보하기 위해 삼각측정법이 적용되었다. 수집된 다양한 자료들은 종합적으로 검토하여 귀납적 범주화를 실시함으로써 담화의 특성에 따라 각 저항성과 학습을 유형별로 분류하였다. 그 결과 소집단 내 담화의 특성으로서 저항성 유형과 학습 유형, 그리고 담화 내에서 나타나는 저항성과 학습의 연관성을 확인할 수 있었다. 본 연구는 질적 사례연구로서, 초등 예비교사들의 소집단 내 SSI 토론활동으로부터 나타나는 긍정적 담화의 요소인 저항성을 분석함으로써 과학수업에 있어서 토론활동의 중요성과 이를 통한 과학수업의 성공적인 교수학습 전략에 대해서 시사점을 얻을 수 있었다. In this study, SSI(Socio-Scientific Issue) discussion activities were conducted for pre-service elementary teachers and the types of resistance and learning as characteristics of discourse through them were analyzed. The participants of this study were 66 pre-service elementary teachers of elementary education major who attended the university of education. The topics of the SSI discussion activities used in this study were all limited to life domain and a total of 5 class discussions was conducted during the first semester of 2017. The collected data were transcription data through recording of discussion activities in small groups, individual activity sheets and group activity sheets, questionnaires of students after discussion activities. Triangulation was applied to ensure reliability of data collection. The collected data were classified each resistance and learning type according to the characteristic of the discourse by comprehensively reviewing and conducting inductive categorization. As a result, it was for resistance types and learning types and the relationship between resistance and learning in discourse to be confirmed in this study. In addition, it was confirmed in this study that the students built the knowledge collaboratively while conducting the SSI discussion activities through the interviews after class discussion. This study was a qualitative case study that analyzes the resistance which is a factor of positive discourse from SSI discussion activities in pre-service elementary teachers. Therefore, this study is pedagogically meaningful and valuable because it contributes to understand the importance of discussion activities and establishes effective teaching strategies in science classrooms in the future

ARM 아키텍처 기반 바이너리 정적 분석을 위한 기준 주소 분석 도구

강지훈(Ji-Hun Kang),류재철(Jae-Cheol Ryou) 한국정보보호학회 2016 정보보호학회논문지 Vol.26 No.5

현대 사회에서는 임베디드 장비의 수가 급증하고 있다. 그러나 급증하는 임베디드 장비와 동시에 악용 가능한 취약점과 백도어 등이 계속해서 발견되고 있어 이에 대한 분석의 필요성이 끊임없이 제기되고 있는 실정이다. 이에 따라 본 논문에서는 임베디드 장비 펌웨어의 정적 분석 환경 구축을 위해 필요한 기준 주소 정보를 추출하는 도구를 개발하고, 이를 사용하여 정적 분석 환경을 구축함으로써 펌웨어 내부 문자열의 파싱과 참조를 가능하게 하고, 증가된 함수식별 개수 등을 통해 도구의 타당성을 증명한다. In modern society, the number of embedded devices has been increasing. However, embedded devices is growing, and the backdoor and vulnerabilities are found continously. It is necessary for this analysis. In this paper, we developed a tool to extract the base address information for the static analysis environment built of the embedded device’s firmware. By using this tool, we built the environment for static analysis. As a result, this point enables us to parse the strings and to check the reference. Also, through the increased number of functions, we proved the validity of the tool.

사각근 증후군 환자의 경추 부정렬에 관한 연구

강지훈 ( Ji Hun Kang ),이길준 ( Kil Joon Lee ),박영회 ( Young Hoi Park ),금동호 ( Dong Ho Keum ) 한방재활의학과학회 2006 한방재활의학과학회지 Vol.16 No.4

Objectives : We investigated the possibility of cervical spine misalignment caused by Scalenus anticus syndrome to find out the Scalenus anticus syndrome could effect misalignment of cervical spine. Methods : 18 patients with Scalenus anticus syndrome who attended Dept. of Oriental Rehabilitation Medicine, College of Oriental Medicine, Dong-guk University from 20th June to 10th September 2006, were involved in the investigation. After researching misalignment through neutrality lateral, flexion lateral, extension lateral x-ray examination views, we measured difference of length of cervical spine misalignment. We analyzed the difference of length of cervical spine misalignment, and the relationship among the neutrality lateral, flexion lateral and extension lateral position. Results : Lateral flexion and lateral extension position were shown higher frequency than neutrality position in cervical spine misalignment. We got the statistical significance in the difference of length of cervical spine misalignment by position changes, it showed that C3, C4 vertebra bodies in lateral neutrality position, C2, C3, C4, C5 vertebra bodies in flexion lateral position, C3-5 vertebra bodies in extension lateral position. Conclusions : It was considered that scalenus anticus syndrome could increase cervical spine misalignment which could be a factor of making in cervical spine disease.

What is the meaning of hs-CRP and HbA1c in patients with dry eye syndrome in diabetes?

Ji-Hun Kang(강지훈),Sang-Yol Shin(신상열) 한국컴퓨터정보학회 2020 韓國컴퓨터情報學會論文誌 Vol.25 No.3

본 연구는 2016년 6월 16일부터 2016년 12월 31일까지 건강검진센터를 방문한 726명을 대상으로 Schirmer’s 검사와 대사증후군 검사를 통해 전신적 만성 염증성 상태가 국소적 만성 염증성 상태로서의 안구건조증에 미치는 영향을 알아보고자 시행하였다. 대상자중 hs-CRP, HbA1c를 동시 측정한 214명을 대상으로 연구를 진행하였다. 연구대상자 중 고 연령일수록 (p<0.001), 성별로는 여성에서 유의하게 안구건조증이 증가하였으며(p=0.020), 공복혈당과 hs-CRP와는 연관이 없었다. 또한 HbA1c가 증가할수록 안구건조증에 대한 위험도가 증가하였다(β=1.960, p=0.025). 따라서 안구건조증은 만성 염증성 상태로 인한 눈물샘의 미세혈관 변화에 의한 것이 아니며 당뇨환자의 경우 단기간의 혈당 조절보다 장기간의 혈당 조절상태가 더욱 중요하게 작용할 수 있음을 알 수 있으며 당뇨병 환자에서 안구 건조증의 높은 유병률은 만성 염증으로 인한 미세 혈관 변화보다는 자율 기능 장애로 인한 것으로 생각된다. The purpose of this study was to investigate the effects of systemic chronic inflammatory state on dry eye syndrome as a local chronic inflammatory condition. From June 16, 2016 to December 31, 2016, 726 patients who visited the general health examination center were screened using the Schirmer’s test and the metabolic syndrome screening test. A total of 214 patients who were studied for hs-CRP and HbA1c were simultaneously selected for the study as well. Dry eye syndrome significantly increased in higher age groups (p<0.001) and women (p=0.020); there was no significant relationship with fasting plasma glucose, hs-CRP. In addition, as HbA1c increased the risk for dry eye syndrome also increased (β=1.960, p=0.025). Therefore, dry eye syndrome may not caused by microvascular changes in the lacrimal gland due to chronic inflammatory conditions. In diabetic patients, long-term blood glucose control may be more important than short-term blood glucose control. The high prevalence of dry eye syndrome in diabetic patients is thought to be due to autonomic dysfunction rather than microvascular changes caused by chronic inflammation.

모터 운전 주파수에 동기화된 차단주파수를 갖는 HPF(High pass filter)를 적용한 영구자석 동기전동기의 자속기반 센서리스 제어의 추정 자속 DC offset 제거 기법

강지훈(Ji-Hun Kang),조관열(Kwan-Yuhl Cho),김학원(Hag-Wone Kim) 한국산학기술학회 2019 한국산학기술학회논문지 Vol.20 No.3

영구자석동기전동기의 쇄교자속 기반 센서리스 제어는 저속에서 위치추정 특성이 우수 하지만 계측된 전류가 ADC를 통해 변환되는 과정에서 발생한 DC offset에 의하여 쇄교자속 추정기의 적분기가 포화되는 문제점을 가지고 있습니다. 이러한 현상을 방지하기 위해 낮은 차단주파수를 갖는 HPF를 사용하여 DC offset 성분을 제거하는 방법이 사용되나, HPF의 낮은 차단주파수로 인해 고속에서 추정 성능이 저하되는 문제점이 있다. 반면 HPF의 차단 주파수를 높이게 되면, 저속에서 위상 앞섬 및 초기기동 실패의 문제가 발생한다. 본 논문에서는 HPF의 차단주파수를 영구자석동기전동기의 운전주파수에 동기화함으로써 낮은 속도에서는 HPF의 차단주파수를 낮게 하여 HPF에 의한 위상 앞섬을 줄이고, 높은 속도에서는 HPF의 차단주파수를 높게 함으로써 높은 DC offset 제거 성능을 통해 운전영역을 200% 확대한다. 또한, 추가적인 위상 보상 알고리즘을 통해 전 운전영역에서 HPF의 위상 앞섬이 1.5도 미만으로 감소되는 방법을 제안한다. 제안된 센서리스 제어 알고리즘은 세탁기용 영구자석동기전동기를 이용한 실험을 통해 검증한다. The sensorless control based on the flux linkage of PM synchronous motors has excellent position estimation characteristics at low speeds. However, a limitation arises because the integrator of flux estimator is saturated by the DC offset generated during the analog to digital conversion(ADC) process of the measured current. In order to overcome this limitation, HPF with a low cutoff frequency is used. However, the estimation performance is deteriorated (Ed- the verb deteriorate already includes the meaning of "problem") at high speed due to the low cutoff frequency, and increasing the cutoff frequency of the HPF induces further problems of phase leading and initial starting failure at low speeds. In this paper, the cutoff frequency of HPF was synchronized to the operation frequency of the motor: at low speeds the cutoff frequency was set to low in order to reduce the phase leading of the estimated flux, and at high speeds it was set to high to raise the DC offset removal performance. As a result, the operating range was increased by 200%. Furthermore, a phase compensation algorithm is proposed to reduce the phase leading of the HPF to less than 1.5 degrees over the full operating range. The proposed sensorless control algorithm was verified by experiment with a PM synchronous motor for a washing machine.

스마트 충전 시스템의 전원 공급장치 설계 및 제어

강지훈(Ji-Hun Kang),박형구(Hyung-Gu Park),장재형(Jae-Hyung Jang),이강윤(Kang-Yoon Lee) 대한전기학회 2013 정보 및 제어 심포지엄 논문집 Vol.2013 No.10

추나수기요법과 자침으로 호전된 만성 미골통 환자

강지훈 ( Ji Hun Kang ),김대필 ( Dae Feel Kim ),박영회 ( Young Hoi Park ),금동호 ( Dong Ho Keum ) 한방재활의학과학회 2005 한방재활의학과학회지 Vol.15 No.3

Objectives : This study was performed to evaluate the effect of Chuna manipulation and acupuncture treatment on coccygodynia clinically. Methods : The patients were hospitalized Dept. of Oriental Rehabilitation Medicine, College of Oriental Medicine, Dong-Guk University, diagnosed as Chronic coccygodynia and treated with Chuna Manipulation, Acupuncture. After measured the VAS(visual analogue scale), we analyzed effect of chuna manipulation and acupuncture treatment on coccygodynia. Result & Conclusions : Symptom of patient such as coccygodynia was improved after above treatment. So it is suggested that oriental medical treatment are effective in the coccygodynia.

경추 추나를 이용하여 치료한 특발성 결막염 치험 1례

강지훈(Ji-Hun Kang),최유석(You-Seok Choi),김대필(Dae-Pil Kim),박영회(Young-Hoi Park),금동호(Dong-Ho Keum) 척추신경추나의학회 2004 대한추나의학회지 Vol.5 No.1

Objective : There is no case report on the Idiopathic Conjunctive treated by CHUNA manual therapy in oriental medicine. We experienced a patient with the Idiopathic Conhunctivitis improved by CHUNA manual therapy in X-ray imagine and visual analogue scale(VAS), and we report it. Methods : During the patient with the Idiopathic Conjunctivitis was treated CHUNA manual therapy, we examined cervial X-ray and evaluated the patient s symptoms by VAS and counting eye drop. And we observed whether the change exist or not in X-ray. Result : Symptoms(Red eye, eye xerosis) was improved significally, and the X-ray image was improved. Conclusion : Conjunctivitis was generally treated steroid eye drop and conservative treatment. But CHUNA manual therapy may be more effective in the Idiopathic Conjunctivitis, if more clinical studies and researchs are accomplished.