• Title, Summary, Keyword: conceptual resources

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A Theoretical Review and Trial Application of the 'Resources-Based View' (RBV) as an Alternative Cognitive Theory (대안적 인지 이론으로서 '자원 기반 관점'에 대한 이론적 고찰과 시험 적용)

  • Oh, Phil Seok
    • Journal of The Korean Association For Science Education
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    • v.35 no.6
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    • pp.971-984
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    • 2015
  • The purpose of this study is twofold: to theoretically review the 'resources-based view' (RBV) developed by D. Hammer and his colleagues as an alternative cognitive theory and to illustrate the usefulness of the theory by applying it to interpret a science learning activity in which undergraduate students worked together to construct a model of the seasons. The theoretical review was based on the exploration of relevant literature and dealt mainly with three types of resources: conceptual, epistemological, and practical resources. The trial application revealed that scientific models have been developed through the combination of different pieces of conceptual resources activated from participants, rather than emerging as unitary wholes. However, all the activated resources were not included into a model, and some of the conceptual resources acted as constraints to constructing a scientific model. The implications included that science educators should be attentive and responsive to students' resources and help them use the resources productively to learn science.

The Integration of Adaptive Elements into High-Rise Structures

  • Weidner, Stefanie;Steffen, Simon;Sobek, Werner
    • International Journal of High-Rise Buildings
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    • v.8 no.2
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    • pp.95-100
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    • 2019
  • Whilst most research focuses on the reduction of operative energy use in buildings, the aspect of which (and how many) materials are used is often neglected and poorly explored. However, considering the continuous growth of the global population and the limited availability of resources, it is clear that focusing on operative energy alone is too short-sighted. The tasks lying ahead for architects and engineers cannot be accomplished with conventional methods of construction. With a share of 50-60% of global resource consumption, the building industry has a decisive impact on our environment. If business as usual continues, resources will be significantly depleted in a matter of decades. Therefore, researchers of the University of Stuttgart are investigating the concept of adaptivity as a promising method for saving resources in the built environment. The term adaptivity in the context of building structures was first introduced by Werner Sobek. It describes a method where sensors, actuators and control units are implemented in systems or facades in order to oppose physical impacts in an ideal way. The applicability of this method will be verified on an experimental high-rise building at the University campus in Stuttgart. Thus, this paper describes this innovative research project and depicts the concept of adaptivity in high-rise structures. Furthermore, it gives an overview of potential actuation concepts and the interdisciplinary challenges behind them.

Developing a Conceptual ERP Model by using "4+1 View" ("4+1 뷰"를 적용한 ERP 개념 모델 개발)

  • 허분애;정기원;이남용
    • The Journal of Society for e-Business Studies
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    • v.5 no.2
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    • pp.81-99
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    • 2000
  • Nowadays, many commercial ERP products, such as Oracle, SAP, and Baan, etc, are designed based on large-scaled companies. It is difficult for small and medium-size companies with weakness in budgets and resources(e.g., human, organization, technique, and so on) to use them as it was. So, new ERP system need to be provided for small and medium-size companies. In this paper, we model and provide a conceptual ERP model for small and medium-size companies by using "4+1 View" architecture model of Unified Modeling Language(UML). The conceptual ERP model consists of five subsystems: Manufacturing, Sales, HumanResource and Payroll, Accounting, and Trading. Especially, we describe the conceptual ERP model focusing on "Manufacturing" subsystem by using several diagrams of UML. By using the conceptual ERP model, the ERP system′s developers of small and medium-size companies can obtain many benefits: improving the efficiency of software developing process and helping user requirements gathering and description of ERP system′s nonfunctional aspect as well as functional aspect.

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Effects of Modeling-Based Science Inquiry Instruction on Elementary Students' Learning in the Unit of Seasonal Changes (초등학생들의 계절의 변화 단원의 학습에서 모델링 중심 과학 탐구 수업의 효과)

  • Yoo, Yeon Joon;Oh, Phil Seok
    • Journal of Korean Elementary Science Education
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    • v.35 no.2
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    • pp.265-276
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    • 2016
  • In this study, modeling pedagogies were employed to re-design and teach the unit of Seasonal Changes in the $6^{th}$ grade science curriculum. The effects of the modeling-based program were investigated in both the conceptual and affective domains using an approach of mixing quantitative and qualitative techniques. The result showed that the students in the modeling-based science inquiry classroom gained a higher mean score in a conceptual achievement test than their counterparts in a traditional science classroom. The number of the conceptual resources activated to explain the causes of the seasons, as well as the types of student explanations developed through the combination of the resources activated, were greater in the modeling-based classroom. The modeling-based science inquiry was also effective in improving student attitudes toward science lessons. It was revealed, however, that the students experienced both positive and negative epistemic feelings during the modeling-based science inquiry. Implications of these findings for science education and relevant research were suggested and discussed.

A Comparative Study on Groundwater Flow Depending on Conceptual Models in Tunnel Modeling (터널모델링시 개념모델에 따른 지하수 유동 예측결과 비교연구)

  • 최미정;이진용;구민호;이강근
    • The Journal of Engineering Geology
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    • v.14 no.2
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    • pp.223-233
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    • 2004
  • When the groundwater outflow occurs due to tunnel excavation during the road and railroad construction, depletion of groundwater resources, deficiency in the living and agricultural waters, and changes in the surface water flux are expected. The MODFLOW is a most commonly used and three dimensional finite difference model to predict changes in the groundwater system due to the tunnel construction. A conceptual model is one of the most important elements for the proper modeling results. Essential information will not be extracted from an oversimplified conceptual model while excess time and resources with much field data are required for the very complicated one. This study presented a comparison of the modeling results depending on some conceptual models and discussed construction of the efficient conceptual model for reasonable and realistic results in the tunnel modeling.

The Estimations of A Conceptual Time Distribution of Rainfall and Design Flood (강우의 개념적 시간분포와 설계홍수량 산정에 관한 연구)

  • Lee Byung Woon;Jang Dae Won;Kim Hung Soo;Seoh Byung Ha
    • Proceedings of the Korea Water Resources Association Conference
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    • pp.937-942
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    • 2005
  • It is necessary to estimate the runoff hydrograph and peak flood discharge using law of probability for synthetic flood control policy and design of hydraulic structures. Rainfall analysis is needed in the process of peak flood discharge estimation and the time distribution of a design rainfall is a very important process in the analysis. In this study, we estimate design flood for a small urban basin and a rural basin of medium scale which have different travel times. The Huff method is widely used in Korea for the time distribution of design rainfall to estimate design flood. So, we use Huff method and a conceptual method which is suggested in this study for the comparative purpose. The 100-year frequency rainfall is used to estimate design flood for each basin and the design flood is compared with the existing design flood. As the result, the design flood is overestimated $14.6m^3/sec$ by Huff method and is underestimated $70.9m^3/sec$ by a conceptual method for the rural basin. For the small urban basin, the design flood is excessively overestimated $294.65m^3/sec$ by Huff method and is overestimated $173m^3/sec$ by a conceptual method. The reason of excessive overestimation by Huff method in the small urban basin is that the increased rate of rainfall intensity according to the decrease of duration is large and the duration exceeds the time of concentration when the increased rainfall intensity is concentrated in a quartile. Therefore, we suggested a conceptual method for the time distribution of design rainfall by considering the rainless period and duration. Especially, the conceptual method might be useful for the small urban basin with short concentration time which the design flood is overestimated by Huff method.

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Understanding the Role of Wonderment Questions Related to Activation of Conceptual Resources in Scientific Model Construction: Focusing on Students' Epistemological Framing and Positional Framing (과학적 모형 구성 과정에서 나타난 사고 질문의 개념적 자원 활성화의 이해 -인식론적 프레이밍과 위치 짓기 프레이밍을 중심으로-)

  • Lee, Cha-Eun;Kim, Heui-Baik
    • Journal of The Korean Association For Science Education
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    • v.36 no.3
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    • pp.471-483
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    • 2016
  • The purpose of this study is to explore how students' epistemological framing and positional framing affect the role of wonderment questions related to the activation of conceptual resources and to investigate what contexts affect students' framings during scientific model construction. Four students were selected as focus group and they participated in collaborative scientific model construction of mechanisms relating to urination. According to the results, one student whose framings were "understanding phenomena" and "facilitator" asked wonderment questions, but the others whose framings were "classroom game" and "non-respondent" were not able to activate their conceptual resources. However, they were able to activate their conceptual resources when they shared the epistemological framing of "understanding phenomena" and shifted between the positional framings of "facilitator" and "respondent." Although they were able to activate their conceptual resources, these activated resources were not able to contribute to their model when they shifted to the framings of "classroom game" and "receiver." In contrast, when students constantly shared an "understanding phenomena" framing and dynamically shifted between the framings of "facilitator" and "respondent," they were able to activate various conceptual resources and develop their group model. The students' framings were affected by the contexts. These included: when students were confronted with cognitive difficulties and were not provided proper scaffolding; when the teacher played the role of answer provider and guided the activity with correctness; when there were several possible explanatory models that students could choose from; and when the teacher played the role of thought facilitator. This study contributes to supporting teaching and learning environments for productive scientific model construction.

Sensitivity Analysis of Hydrodynamic and Reaction Parameters in Gasoline Transport Conceptual Aquifer Model Based on Hydrogeological Characteristics of Korea (국내 대수층 특성을 반영한 포화대 내 유류오염물질 거동 개념 모델에서 수리동역학적 및 반응 입력인자 민감도 평가)

  • Joo, Jin Chul;Lee, Dong Hwi;Moon, Hee Sun;Chang, Sun Woo;Lee, Soo-Hyoung;Lee, Eunhee;Nam, Kyoungphile
    • Journal of Soil and Groundwater Environment
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    • v.25 no.1
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    • pp.37-52
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    • 2020
  • Sensitivity analysis of hydrodynamic and reaction parameters in conceptual model reflecting aquifer characteristics of Korea was performed to evaluate the uncertainty in the predicted concentrations. Among the hydrodynamic input parameters, both hydraulic conductivity (Kx) and hydraulic gradient (I) affected transport behaviors of contaminants, and resulted in same convergence concentrations with continuous injections of contaminant. However, longitudinal dispervisity (αL) affected both transport behaviors and the convergence concentrations of contaminants. Compared to the hydrodynamic parameters, growth kinetic and degradation parameters (μm & Kc) more significantly affected both transport behaviors and the convergence concentrations of contaminants, indicating those parameters had higher sensitivity indices causing the uncertainties of model predictions. Considering that the sensitivity indices of both hydrodynamic and reaction parameters were a function of transport distance of groundwater, the parameters with higher sensitivity indices, a priori, need to be investigated using conceptual model reflecting site-specific aquifer characteristics before field investigation. After determining the parameters with higher sensitivity indices, the detail field investigations for the selected hydrodynamic and reaction parameters were warranted to reduce the uncertainties of model predictions.

A Method of Simulating Ephemeral Stream Runoff Characteristics in Cheonmi-cheon Watershed, Jeju Island (제주 천미천 유역의 간헐하천 유출특성 모의 방안)

  • Kim, Nam-Won;Chung, Il-Moon;Na, Hanna
    • Journal of Environmental Science International
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    • v.22 no.5
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    • pp.523-531
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    • 2013
  • In this study, a method of simulating ephemeral stream runoff characteristics in Jeju watershed is newly suggested. The process based conceptual-physical scheme is established based on the SWAT-K and applied to Cheonmi-cheon watershed which shows the typical pattern of ephemeral stream runoff characteristics. For the proper simulation of this runoff, the intermediate flow and baseflow are controlled to make downward percolation should be dominant. The result showed that surface runoff simulated by using the modified scheme showed good agreement with observed runoff data. In addition, it was found that the estimated runoff directly affected the groundwater recharge rate. This conceptual model should be continuously progressed including rainfall interception, spatially estimated evapotranspiration and so forth for the reasonable simulation of the hydrologic characteristics in Jeju island.

Retrieval Effectiveness of Subject Descriptor and Citation Searching in the Water Resources Literature (수자원문헌의 주제탐색과 인용탐색의 검색효율 비교 연구)

  • Lee Myeong-Hee
    • Journal of the Korean Society for Library and Information Science
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    • v.26
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    • pp.213-233
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    • 1994
  • This study measured whether subject descriptor searching and citation searching retrieve different documents for conceptual queries and methodological queries in natural science, engineering and social science. The retrieval effectiveness of two search methods was measured using as criteria, total number of documents retrieved, total number of relevant documents, overlapping and unique documents and precision ratio. The search subject was water resources and the databases used were Selected Water Resources Abstracts (SWRA) and SCISEARCH. Data were collected for 21 doctoral students working on their dissertations in the three fields of water resources. Principal findings included: 1) subject searching and citation searching each retrieved substantially equal number of documents; 2) total number of relevant documents for conceptual queries was larger than that for methodological queries, while there was a large variation among the three fields; 3) the average overlap was quite small, while citation searching yielded more unique documents than subject searching; 4) for conceptual queries, citation searching yielded a higher precision ratio than subject searching, while subject searching obtained a slightly higher precision ratio than citation searching for methodological queries ; and 5) citation searching was effective for both specific queries and broad queries if seed articles are well chosen, while subject searching only worked well for broad queries. It was further found that: 1) citation searching is not a subsidiary but a substantial retrieval method in water resources; 2) SWRA is effective for queries for engineering and SCISEARCH is appropriate for queries for natural science, while neither SWRA nor SCISEARCH work well for queries for social science; and 3) characteristics of queries affect retrieval results more than the characteristics of documents or the coverage of databases.

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