• 제목/요약/키워드: activity-based model

검색결과 1,604건 처리시간 0.03초

SCC 활동 전략기반 Kodu SW교육과정 모델 적용을 통한 어린이 코딩 인지 효과 (The Effects of Childrens' Perception of the Kodu Software Curriculum Model based on SCC Activity Strategy)

  • 성영훈;유승한
    • 정보교육학회논문지
    • /
    • 제20권3호
    • /
    • pp.283-292
    • /
    • 2016
  • 2015 개정 교육과정에 따라 초등학생들을 위한 다양한 SW 교육 방안들이 현장에서 연구 개발 적용되고 있다. 하지만 대부분의 SW교육이 언플러그드와 영어 Text에 기반하고 있어 영어와 수학 활동에 익숙하지 않은 초등학교 어린이들뿐만 아니라 가르치는 교사에게도 어렵게 느껴지고 있다. 이에 본 연구는 게임과 아이콘을 통해 쉽게 코딩을 가르치고 배울 수 있는 Kodu game lab 기반 '아이콘 카드 보드'를 개발하였다. 스토리활동, 코딩활동, 협력활동(SCC) 전략기반의 17차시 SW교육과정으로 구성하여 적용 검증한 결과 학생들의 코딩에 대한 흥미도 및 수업모형에서 유의미한 결과를 보였으며 전체적인 SW수업에 대해서도 86%가 만족하는 것으로 응답하였다.

영상기반 인체행위분류를 위한 전이학습 중추네트워크모델 분석 (Transfer Learning Backbone Network Model Analysis for Human Activity Classification Using Imagery)

  • 김종환;류준열
    • 한국시뮬레이션학회논문지
    • /
    • 제31권1호
    • /
    • pp.11-18
    • /
    • 2022
  • 최근 공공장소 및 시설에서 범죄예방 및 시설 안전을 목적으로 영상정보 기반의 인체의 행위를 분류하는 연구가 활발히 진행되고 있다. 이러한 인체 행위분류의 성능을 향상하기 위해서 대부분의 연구는 전이학습 기반의 딥러닝을 적용하고 있다. 그러나 딥러닝의 기반이 되는 중추 네트워크 모델(Backbone Network Model)의 수가 증가하고 아키텍처가 다양해짐에도 불구하고, 소수의 모델만 사용하는 분위기 때문에 운용목적에 적합한 중추 네트워크 모델을 찾는 연구는 미흡한 실정이다. 본 연구는 영상정보를 기초로 인체 행위를 분류하는 인공지능 모델을 개발하기 위해 최근에 개발된 5가지의 딥러닝 중추 네트워크 모델을 대상으로 전이학습을 적용하고 각 모델의 정확도 및 학습효율 측면에서 비교 및 분석하여 가장 효율이 높은 모델을 제안하였다. 이를 위해, 기본적인 인체 행위가 아닌 운동 종목 기반의 활동적이고 신체접촉이 높은 12가지의 인체 활동을 선정하고 관련된 7,200개의 이미지를 수집하였으며, 5가지의 중추 네트워크 모델에 총 20회의 전이학습을 균등하게 적용하고 학습과정과 결과성능을 통해 인체 행위를 분류하는데 적합한 중추 네트워크 모델을 정량적으로 비교 및 분석하였다. 그 결과 XceptionNet 모델이 학습 및 검증 정확도에서 0.99 및 0.91로, Top 2 및 평균 정밀도에서 0.96 및 0.91로 나타났으며 학습 소요시간은 1,566초, 모델용량의 크기는 260.4MB로 정확도와 학습효율 측면에서 다른 모델보다 높은 성능이 나타남을 확인할 수 있었다. 이러한 결과는 전이학습을 적용하여 인체 행위분류를 진행하는 다양한 연구 분야에 활용되기를 기대한다.

A Study on Building Web Services for Implementing Real Time Enterprise

  • Lee, Jung-Min
    • 한국경영정보학회:학술대회논문집
    • /
    • 한국경영정보학회 2007년도 추계학술대회
    • /
    • pp.377-382
    • /
    • 2007
  • To transform the enterprise system into the 'Real Time Enterprise' with respect to IT, I suggest the conceptual application model which is composed of pieces(components) extracted from different packaged applications working in a heterogeneous environment based on the 'business activity' in other words, business services provided by internal (inter-enterprise) and external (extended enterprise) application to support a business activity within in an enterprise and the design mechanism focusing service tier which acts as intermediate tier within application architecture.

  • PDF

활동기반 통행자분석시스템(ABATA)을 이용한 토지이용변화에 따른 차량 배기가스 배출영향 사례 분석 (A Case Study on the Emission Impact of Land Use Changes using Activity-BAsed Traveler Analyzer (ABATA) System)

  • 엄진기;이광섭
    • 지적과 국토정보
    • /
    • 제53권1호
    • /
    • pp.21-36
    • /
    • 2023
  • 전 세계적으로 가장 널리 사용되고 있는 교통수요모형은 전통적 4단계 교통수요모델이다. 하지만, 기존 분석방법은 시공간적으로 다양한 분석에 제약을 가지고 있으며, 이러한 한계를 극복하기 위해 최근 활동기반 모형 및 시스템이 활발히 연구 개발되고 있다. 이에 본 연구에서는 빅데이터를 활용한 활동기반 통행자분석시스템 ABATA(Activity-Based Traveler Analyzer) 기술개발을 소개한다. 이 시스템은 시간별 총인구 추정, 활동 프로파일 생성, 시간별 활동 인구 추정, 공간 활동 인구 추정 및 출발지·목적지 추정 등의 구성요소를 포함한다. 제안된 시스템을 실증하기 위해 사례연구로 세종시 5-1 블록스마트시티를 대상으로 토지이용변화에 따른 배기가스 배출영향을 평가하였다. 그 결과 업무시설 분산계획 시나리오의 토지이용이 업무시설 집중계획 시나리오보다 이동 거리가 길어 배출량이 더 많이 발생하는 것으로 나타났다. 제안된 ABATA 시스템은 활동 인구 및 통행 수요에 대한 인구, 활동 일정 및 미래 토지이용의 변화 영향을 시뮬레이션하기 위한 유용한 도구를 제공할 것으로 기대된다.

PERFORMANCE OF THE AUTOREGRESSIVE METHOD IN LONG-TERM PREDICTION OF SUNSPOT NUMBER

  • Chae, Jongchul;Kim, Yeon Han
    • 천문학회지
    • /
    • 제50권2호
    • /
    • pp.21-27
    • /
    • 2017
  • The autoregressive method provides a univariate procedure to predict the future sunspot number (SSN) based on past record. The strength of this method lies in the possibility that from past data it yields the SSN in the future as a function of time. On the other hand, its major limitation comes from the intrinsic complexity of solar magnetic activity that may deviate from the linear stationary process assumption that is the basis of the autoregressive model. By analyzing the residual errors produced by the method, we have obtained the following conclusions: (1) the optimal duration of the past time for the forecast is found to be 8.5 years; (2) the standard error increases with prediction horizon and the errors are mostly systematic ones resulting from the incompleteness of the autoregressive model; (3) there is a tendency that the predicted value is underestimated in the activity rising phase, while it is overestimated in the declining phase; (5) the model prediction of a new Solar Cycle is fairly good when it is similar to the previous one, but is bad when the new cycle is much different from the previous one; (6) a reasonably good prediction of a new cycle can be made using the AR model 1.5 years after the start of the cycle. In addition, we predict the next cycle (Solar Cycle 25) will reach the peak in 2024 at the activity level similar to the current cycle.

Minimum Structural Requirements for Fungicidal Evaluation of N-Phenyl-O-phenylthionocarbamates against the Capsicum Phytophthora Blight (Phyophthora capsici) Based on the 3D-QSARs

  • Soung, Min-Gyu;Jang, Seok-Chan;Sung, Nack-Do
    • Bulletin of the Korean Chemical Society
    • /
    • 제31권11호
    • /
    • pp.3297-3300
    • /
    • 2010
  • In this study, the 3D-QSARs (three-dimensional quantitative structure-activity relationships: CoMFA and CoMSIA) between structural changes of N-phenyl-O-phenylthionocarbamate analogues (1-30) and their fungicidal activities against the capsicum phytophthora (Phyophthora capsici) fungi were analyzed, then considered quantitatively in terms of minimum structural requirements for fungicidal evaluation. The statistical qualities ($r^2_{cv.}$ = 0.510 and $r^2_{ncv.}$ = 0.948) of the optimal CoMFA 1 model are improved over the other models in the conditions of field combinations, and the two alignments. In the optimal CoMFA 1 model, relative contribution percentages of the CoMFA field were: steric field, 52.3%; electrostatic field, 37.8%; hydrophobic field, 9.9%. Results were similar for the CoMFA 2 model. Therefore, the steric field of the analogues had the highest contribution ratio for fungicidal activity. Specifically, with the contour map of steric fields, the fungicidal activity increased when bulky steric Y-substituents were introduced to the meta-position on the N-phenyl ring and small steric Y-subsituents were introduced to its para-position.

c-hexane을 포함하는 이성분계 혼합물에서 활동도계수 모델을 이용한 변동적분 Gij의 계산 수치와 실험 수치의 비교 (Comparison of Experimental Data on the Fluctuation Integral Gij with the Calculated Results Based on the Activity Coefficient Model in Binary Mixtures Containing c-Hexane)

  • 허광일;권영중
    • 산업기술연구
    • /
    • 제20권A호
    • /
    • pp.203-209
    • /
    • 2000
  • The fluctuation integrals which give useful information in the structure of solution are associated with the mixed direct correlation integral ($C_{12}$) known. Using its weighted arithmetic mean of $C_{11}$ and $C_{22}$ and the activity coefficient model, the fluctuation integrals on solute-solute, solvent-solute, and solvent-solvent can be calculated in the function of mole fraction. In this work, several binary mixtures containing c-hexane were tested and the results on the fluctuation integrals were rather good.

  • PDF

Probabilistic Location Choice and Markovian Industrial Migration a Micro-Macro Composition Approach

  • Jeong, Jin-Ho
    • 지역연구
    • /
    • 제11권1호
    • /
    • pp.31-60
    • /
    • 1995
  • The distribution of economic activity over a mutually exclusive and exhaustive categorical industry-region matrix is modeled as a composition of two random components: the probability-like share distribution of jobs and the dynamic evolution of absolute aggregates. The former describes the individual activity location choice by comparing the predicted profitability of the current industry-region pair against that of all other alternatives based on the available information on industry-specific, region specific, or activity specific attributes. The latter describes the time evolution of macro-level aggregates using a dynamic reduced from model. With the seperation of micro choice behavior and macro dynamic aggregate constraint, the usual independence and identicality assumptions become consistent with the activity share distribution, hence multi-regional industrial migration can be represented by a set of probability evolution equations in a conservative Markovian from. We call this a Micro-Macro Composition Approach since the product of the aggregate prediction and the predicted activity share distribution gives the predicted activity distribution gives the predicted activity distribution which explicitly considers the underlying individual choice behavior. The model can be applied to interesting practical problems such as the plant location choice of multinational enterprise, the government industrial ploicy to attract international firms, and the optimal tax-transfer mix to influence activity location choice. We consider the latter as an example.

  • PDF

An Incremental Statistical Method for Daily Activity Pattern Extraction and User Intention Inference

  • Choi, Eu-Ri;Nam, Yun-Young;Kim, Bo-Ra;Cho, We-Duke
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • 제3권3호
    • /
    • pp.219-234
    • /
    • 2009
  • This paper presents a novel approach for extracting simultaneously human daily activity patterns and discovering the temporal relations of these activity patterns. It is necessary to resolve the services conflict and to satisfy a user who wants to use multiple services. To extract the simultaneous activity patterns, context has been collected from physical sensors and electronic devices. In addition, a context model is organized by the proposed incremental statistical method to determine conflicts and to infer user intentions through analyzing the daily human activity patterns. The context model is represented by the sets of the simultaneous activity patterns and the temporal relations between the sets. To evaluate the method, experiments are carried out on a test-bed called the Ubiquitous Smart Space. Furthermore, the user-intention simulator based on the simultaneous activity patterns and the temporal relations from the results of the inferred intention is demonstrated.

Interference and Sink Capacity of Wireless CDMA Sensor Networks with Layered Architecture

  • Kang, Hyun-Duk;Hong, Heon-Jin;Sung, Seok-Jin;Kim, Ki-Seon
    • ETRI Journal
    • /
    • 제30권1호
    • /
    • pp.13-20
    • /
    • 2008
  • We evaluate the sink capacity of wireless code division multiple access (CDMA) sensor networks with layered architecture. We introduce a model of interference at a sink considering two kinds of interference: multiple access interference (MAI) and node interference (NI). We also investigate the activity of sensor nodes around the sink in relation to gathering data under a layered architecture. Based on the interference model and the activity of sensor nodes around the sink, we derive the failure probability of the transmission from a source node located one hop away from the sink using Gaussian approximation. Under the requirement of 1% failure probability of transmission, we determine the sink capacity, which is defined as the maximum number of concurrent sensor nodes located one hop away from the sink. We demonstrate that as the node activity of the MAI decreases, the variation of the sink capacity due to the node activity of the NI becomes more significant. The analysis results are verified through computer simulations.

  • PDF