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빅 데이터 기반 적응적 학습시스템을 위한 학습자 프로파일 설계
박종선 이러닝학회 2016 이러닝학회 학술발표대회논문집 Vol.7 No.2
최근 빅 데이터 활용에 대한 관심이 높아지면서 이러닝 학습시스템에 적용하고자 하는 움직임이 많아지고 있다. 빅 데이터 기반 적응적 학습시스템은 다양한 학습자의 학습활동 특성을 반영하여 학습자에게 최적화된 학습을 지원하는 학습시스템을 의미한다. 빅 데이터 기반의 적응학습시스템을 구현하기 위해 필요한 학습자 모델을 구성하기 위한 방안으로 학습자들의 프로파일 정보를 IEEE의 PAPI 학습자 프로파일 정보모델, IMS의 LIP 학습자 프로파일 정보모델, 적응적 조언학습시스템에서의 학습자 프로파일, 유비쿼터스 환경에서의 학습자 프로파일을 참조하여 개인 신상, 관계, 보안, 학습선호도, 학습 성취, 학습활동, 학습활동 산출물(Portfolio) 등의 정보로 구분하여 제안하였다.
프록시 모바일 IPv6 네트워크에서 멀티캐스팅 서비스 지원을 위한 글로벌 이동성관리 기법
박종선,김종연,정종필,Park, Jongsun,Kim, Jongyoun,Jeong, Jongpil 한국인터넷방송통신학회 2012 한국인터넷방송통신학회 논문지 Vol.12 No.6
멀티미디어의 발달은 고속 네트워크 발전과 이어졌으며, 모바일 장비의 성능 향상으로 높은 전송속도로 광대역 인터넷망 접속과 실내와 실외 사이의 끊김 없는 모바일 멀티캐스팅 서비스를 가능하게 했다. 멀티캐스팅 서비스는 모바일 멀티캐스팅을 기반으로 효율적인 그룹 통신을 지원한다. 그러나 모바일 멀티캐스팅 서비스는 터널 컨버젼스와 핸드오버 지연이라는 제약조건이 있다. 이와 같은 문제를 해결하기 위해 많은 프로토콜들이 연구되어 왔고, 핸드오버 방법 또한 연구대상이 되었다. PMIPv6 기반의 네트워크 에서 모바일 멀티캐스팅 서비스를 위한 도메인 간 최적화된 핸드오버 모델을 제안한다. 제안한 모델은 터널 컨버젼스를 제거하고 라우터 프로세싱을 줄여준다. 또한, 적합한 전송 메커니즘을 이용하여 빠른 핸드오버를 가능하게 한다. 또한 제안한 방식은 이전에 제안된 모델 보다 패킷 전송 비용과 지연시간이 감소하여 도메인 간에서 빠른 핸드오버를 보장한다. The development of multimedia applications followed by development of high-speed networks has improved the performance of mobile devices with high transfer speed broadband. Mobile internet access has made possible seamless indoor and outdoor mobile multicast services. Multicasting services are used to support efficient group communications. However, mobile multicasting services have two constraints: tunnel convergence and handover latency. Many protocols and handover methods have been proposed to address these problems. The inter-LMA optimized handover model for multicasting services has previously been proposed for PMIPv6-based networks. The proposed model removes the tunnel convergence issue and reduces router processing costs. It also makes possible the performance of fast handover operations with adaptive transmission mechanisms. In addition, the proposed scheme exhibits low packet delivery costs and handover latency in comparison with existing schemes, and ensures fast handover when moving the inter-LMA domain
박종선,정규원 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
Recently, the ultra-precision stage is widely used in the fields of the nano-technology, specially in AFMs(Atomic Force Microscope) and STMs(Scanning Tunneling Microscope). In this paper, the ultra-precision stage which consists of flexure hinges, piezoelectric actuator, and ultra-precision linear encoder, is designed and developed. The guide mechanism which consisted of flexure hinges is analyzed by Finite Element Method. And we derived the transfer function of the system in 1st order system from step responses according to the magnitude. We performed simulation for the model to tune the control gain and applied the gains to the developed system. Experimental results found that the stage can be controlled in 5 nm resolution by PID controller.
朴鍾先 건국대학교 1978 論文集 Vol.8 No.1
1. Four varieties of perilla, Perilla Ocymcides. Var. Typica Makind, were tested to investigate the ecological adaptation of the crop to variations in sowing date extending from April 25 to July 25 with an interval of 30 days between each of the four sowing. 2. As sowing date was delayed, the plant height, the number of first branches and clusters, the weight of fresh and dried stems, the days to germination and flowering decreased. A highly negative correlation were shown between the sowing dates and these characteristics, but a highly positive correlation between the days to flowering and the required accumulated temperature. 3. With early sowing under low temperature and long day conditions, it took about 32 days frown sowing to lowering due to the long period of vegitative growth ; but, as sowing was delayed, the darts to flowering decreased with a minimum period of 57 days. 4. The yield of seeds in each case varied with each variety ; A-type (Non San var.) and B-type (Jin Chon var.) had higher yields when sowed earlier. But C-type (Nam Yang and Wool Jin var.) had its highest yield in the plot sowed on May 25 and the 1000-grains weight showed a tendency to increase as sowing was delayed. 5. Perilla appeared to be a short-day plant that glowers from the begining to the middle of September regardless of sowing date. Therefore the sowing date seemed to be decided according the length of the vegetative growth periods of the varieties.
朴在云,朴鍾善 관동대학교 1997 關大論文集 Vol.25 No.2
One of the most important elements of any structural frame is the column. This element is usually under the action of combined axial load and bending moment. Columns with small slenderness ratios are usually analysed by simple consideration of the equilibrium of forces and compatibility of strains. On the other hand, for columns with large slenderness ratios, the compound effect of the axial load and column deflection adds to the column bending moment, thus reducing of the column ultimate capacity. In this study, the analytical method for the Behavior and ultimate strength of Eccentrically Loaded Restrained PC slender Columns is developed, including the material and geometrical nonlinearities and the nonlinear behavior of restrained end of a column in a frame. Accordingly, the objectives of this investigation are to use the method developed to conduct a parametric study of the different variable (Rotational Restraints, Ratio of End Restraints, End Eccentricity, Ratio of End Eccentricities, Lateral Restraints, Concrete Strength) influencing the behavior and the ultimate strength for PC columns.