• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.445-451
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• 2007

시각과 관련된 정서 연구 중에서 색에 대한 연구나 움직임에 대한 연구는 많이 이루어져 왔으나 정적인 형태 자체에서 감성을 불러일으킬 수 있는가에 대한 연구는 많이 이루어지지 않았다. 따라서 이 논문에서는 2차원적인 형태 중, 모든 형태의 기본이 되는 3가지 기본적인 도형(삼각형, 사각형, 원)을 중심으로 도형의 물리적 속성에 따른 감성 차이가 있는지를 살펴보고자 하였다. 도형의 물리적 속성은 물체 인식과 시각 디자인에서 중요시되는 요소인 방향성, 정형성, 비례, 예리함을 중심으로 감성이 어떻게 달라지는지를 살펴보았다. 그 결과 방향성, 정형성, 비례, 예리함에 따라 도형에 따른 감성의 차이가 모두 존재함을 알 수 있었다. 도형간의 차이는 쾌 불쾌 차원에서는 원으로 갈수록 쾌함을 확인했고 각성 차원에서는 삼각형으로 갈수록 각성이 높아짐을 알 수 있었다. 방향성은 수평, 수직보다 기울어진 형태에서 쾌하고 각성이 낮음을 알 수 있었다. 비례는 너비와 높이의 비가 1:1 일 때 각성이 가장 낮고 쾌한 정도가 상대적으로 가장 높음을 알 수 있었고 비정형 도형일수록 불쾌하고 각성이 높음을 알 수 있었다. 아울러 도형과, 방향성 비례 그리고 정형성간의 상호작용 측면도 살펴보았고 어떤 요소가 더 영향을 미칠 수 있는지도 살펴보았다. 이러한 결과를 바탕으로 도형이 어떤 속성이 이러한 감성을 불러일으키는 요인인지를 알아보기 위한 추가실험도 실시하였다. 그 결과 도형의 속성 중 모서리의 예리함이 감성차이를 불러일으킬 수 있는 요인이 될 수 있음을 알 수 있었고 선 형태와의 상호 작용 시 예리함이 감성에 더 영향을 미칠 수 있는 요인임을 추론할 수 있었다. 이러한 도형이 주는 감성 연구는 도형의 감성적인 평가 과정이 인지와 정서간의 관계를 설명해 줄 수 있는 내용이 될 수 있다는 점에서 의의가 있다. 아울러 기본이 되는 도형의 형태로부터 감성의 차이가 있음을 확인함으로써 제품의 물리적 디자인에 대한 가이드라인을 제공해 줄 수 있을 것이라 예상된다. 특히 각성 상태가 인지적 수행에 중요한 영향을 미칠 수 있다는 사실로부터 학습도구에서의 도형의 효과적인 사용을 제안하고자 한다.

• 대한정형외과스포츠의학회:학술대회논문집
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• 2002.11a
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• pp.14-14
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• 2002

• Journal of the Korean Orthopaedic Association
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• v.55 no.5
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• pp.383-396
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• 2020

Purpose: This study compared the injury mechanism, site, type, initial management approach of orthopedic injury, and outcomes according to the injury severity in moderate-to-severe injured patients. Materials and Methods: During 57-month, excluding the period when the authors' emergency/trauma center was not operating, from 2014 to 2019, a retrospective study was conducted on 778 patients with orthopedic injuries among patients with an Injury Severity Score (ISS)>9 scored. The patients were classified into moderate-injured group (group-1, 679) and severe-injured group (group-2, 99) according to the injury severity based on the ISS and physiologic parameters. The injury mechanism and non-orthopedic injury were evaluated. Orthopedic injuries were assessed according to the injury pattern and the number of anatomical regions and bone sites involved. The management approach for the orthopedic injuries in two groups was compared. Outcomes (hospital stay, systemic complications, and in-hospital mortality) were evaluated, and the risk factors for mortality were analyzed. Results: In group-2, the incidence of younger males, high-energy mechanisms, and accompanying injuries was significantly higher than in group-1. The number of anatomical regions and bone sites involved increased in group-2. The involvement of the pelvis, spine, and upper extremity was significantly higher in group-2, whereas group-1 was involved mainly by the lower extremities. Depending on the patient's condition, definitive or staged management for orthopedic injuries may be used. Group-1 was treated mainly with definite fixation after the physiological stabilization process, and group-2 was treated with staged management using temporary external fixation. The hospital stay was significantly longer in group-2. The overall systematic complications and in-hospital mortality was approximately 4.9% and 4.5%. A higher injury severity was associated with higher in-hospital mortality (2.9%, 15.2%; p<0.0001). Increasing age and high ISS are independent risk factors for mortality. Conclusion: A higher severity of injury was associated with a higher incidence of high-energy mechanism, younger, male, accompanying injuries, and the frequency and severity of orthopedic injuries. Severe polytrauma patients were treated mainly with a staged approach, such as external fixation. The hospital stay, systematic complications, and in-hospital mortality were significantly higher in severe-injured patients. Age and ISS are strong predictors of in-hospital mortality in polytrauma.

• Journal of KIISE:Software and Applications
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• v.33 no.12
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• pp.1008-1021
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• 2006

Product line engineering(PLE) is one of the recent and effective reuse approaches that enables developing a number of applications by instantiating a core asset. Elements of a core asset are product line architecture(PLA), component, and decision model. Among these elements, PLA is the key element since it defines the overall structure of the core asset. Although numerous PLE methodologies have been introduced, it is still unclear what should be the elements of a PLA and how to systematically instantiate it for specific applications. Formal specifications can play a key role in defining detailed and precise instantiation process. In this paper, we first present a meta model of PLA and show how to specify PLA in a formal language, Object-Z. Then, we propose instantiation rules using formal specification and those rules precisely define constraints for instantiating PLA. By applying the proposed formal specification, we believe PLA instantiation can be carried out precisely and correctly, yielding high quality software development.

• The KIPS Transactions:PartD
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• v.8D no.1
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• pp.99-104
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• 2001

As a plan to counteract solving software crisis, the technology that is called Component Based Software Engineering (CBSE or Componentware) is introsuced. Component Based Software Developement (CBSD) Processes as one of the technique among CBSE have been proposed. Component specification activities among CBSD Processed are necessary and important for generating feusable component. However, the existing CBSD processed can't ensure the correctness in requirements are reflected. In this paper, we propose that formal activities wgich specify component using formal specification language Z which is verified with the ability of analysis and logicality. The proposed activities are composed of 5 tasks and 12 subtasks. By presenting specific 19 products, it is also proposed that component specification activities which are the base of CBSD for reusing. The proposed activities are able to improve qualities of component through correctness and verification of requirements specification of users in the early step of component-based software process.

• The Journal of the Korea Contents Association
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• v.7 no.11
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• pp.52-58
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• 2007

The game software development involves planning, programming and graphics. Between planning and programming, software analysis and design is essential and plays the role of a bridge. This article analyzes, for game software, the applicability of formal methods, which are widely used in general software engineering fields. Since the effective communication between game planners and game developers is crucial, appropriate application of formal methods give us a lot of benefits in view of development cost and software quality.

• Journal of the Korean Orthopaedic Association
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• v.55 no.6
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• pp.550-553
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• 2020

Acupuncture, which is a procedure of inserting needles in a specific portion of the body to control pain, is conducted widely. The procedure is considered relatively safe because of its minimal side effects and low occurrence (1 in 200,000). On the other hand, its side effects include neurological damage, infection, hematoma, emphysema, etc. The authors report a case of cervical neurological damage that occurred after an acupuncture procedure.

• Journal of the Korean Orthopaedic Association
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• v.54 no.4
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• pp.366-371
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• 2019

Hemarthrosis occurring after arthroscopic surgery for lesions of the shoulder joint is a very rare complication that can develop due to an injury to the blood vessels when an anterior portal is formed. This is a complication that rarely develops in patients who are taking antithrombotic drugs or who do not have associated diseases, such as thrombocytopenia. We report a case of hemarthrosis that occurred after performing arthroscopic surgery to repair a rotator cuff tear in a patient with a stenosis in an arteriovenous fistula for hemodialysis in the ipsilateral upper arm.

• The Journal of the Korea Contents Association
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• v.19 no.1
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• pp.1-15
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• 2019

One of the biggest difficulties in the vocational training field is the dropout problem. A large number of students drop out during the training process, which hampers the waste of the state budget and the improvement of the youth employment rate. Previous studies have mainly analyzed the cause of dropouts. The purpose of this study is to propose a machine learning based model that predicts dropout in advance by using various information of learners. In particular, this study aimed to improve the accuracy of the prediction model by taking into consideration not only structured data but also unstructured data. Analysis of unstructured data was performed using Word2vec and Convolutional Neural Network(CNN), which are the most popular text analysis technologies. We could find that application of the proposed model to the actual data of a domestic vocational training institute improved the prediction accuracy by up to 20%. In addition, the support vector machine-based prediction model using both structured and unstructured data showed high prediction accuracy of the latter half of 90%.

• Journal of the Korean Orthopaedic Association
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• v.52 no.1
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• pp.65-72
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• 2017

Purpose: The purpose of this study was to evaluate the radiologic features of juxtafacet cyst and determine the correlation between these features and clinical outcome. Materials and Methods: We analyzed a total of 23 patients. The degree of facet joint degeneration was classified using the Fujiwara method. The facet joint angles were measured with an magnetic resonance imaging to determine whether there was a difference between the cystic lesion that was occupied and the cystic lesion that was not occupied. Disc degeneration was measured by the Pfirrmann classification method. The clinical result was evaluated using the Oswestry disability index score and visual analogue scale. Results: The L4-5 level of juxtafacet cyst was mostly affected, as found in previous studies. Facet joint arthritis was more severe within the side with the cystic lesion. Significant correlation was found between disc degeneration and juxtafacet joint cyst. All patients underwent wide decompression and fusion. Clinical result was excellent. No patients had signs of recurrence during the follow-up periods. Conclusion: Juxtafacet cyst has a significant correlation with facet joint degeneration. Therefore, aggressive surgical treatment-not just simple cyst excision-should be considered as the treatment option for juxtafacet cyst associated with degenerative lumbar disease.