• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2021년도 추계학술발표대회
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• pp.805-807
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• 2021

In-hospital cardiac arrest is a significant problem for medical systems. Although the traditional early warning systems have been widely applied, they still contain many drawbacks, such as the high false warning rate and low sensitivity. This paper proposed a strategy that involves a deep learning approach based on a novel interpretable deep tabular data learning architecture, named TabNet, for the Rapid Response System. This study has been processed and validated on a dataset collected from two hospitals of Chonnam National University, Korea, in over 10 years. The learning metrics used for the experiment are the area under the receiver operating characteristic curve score (AUROC) and the area under the precision-recall curve score (AUPRC). The experiment on a large real-time dataset shows that our method improves compared to other machine learning-based approaches.

• 한국식생활문화학회지
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• 제22권1호
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• pp.83-90
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• 2007

The changes of the color, texture and volatile flavor compounds of Yu-gwa were investigated that affected by the oxidation during storage to characteristic Yu-gwa quality. Among the proximate compositions, carbohydrate was the most abundant component, and followed by lipid and moisture. Although the change of the color showed different pattern by the packaging materials during the storage period, the value of yellowness(b) increased but that of lightness(L) decreased dramatically after 3 month storage. In the textural properties reported closely related with the moisture content, hardness was fairly affected on the period of the storage rather than the type of packaging materials. The flavor compounds of Yu-gwa were analyzed to evaluate the change of distinct volatile compounds during storage. Of the twenty one separated volatile compounds, major volatiles were aldehydes, alcohols and alkenes. The results also showed that polyethylene(PE) contained less volatiles than polypropylene(PP) by the oxidation process during storage.2,4-Decadienal was gradually increased with the period of the storage, whereas octane and furan were decreased. The results provided that the change of the flavor distribution during the storage, and also the possibility of the volatiles such as hexanal, nonanal and 2,4-decadienal as the indicator for the oxidation process.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.592-595
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• 2013

Advent of Wireless Sensor Networks (WSN) has provided potentials to a variety of construction applications. It is well appreciated that WSNs have advantages over traditional wired system, such as ease of installation and maintenance with increased cost savings and efficiencies. However, the obstruction of wireless signal from physical objects in the heterogeneous construction environment often brings challenges to WSN measurement system. This paper analyzed the obstruction characteristic of construction environment where construction materials, equipment, and built structures obstruct the wireless signal yielding negative effect of measurement system. By adopting evaluation criteria, such as packet reception rate, field experiments have been implemented to quantitatively identify the interference of wireless signal from penetration, reflection, and network traffic under the construction environment. The results show that reliable performance of wireless sensor in construction environment depends on the optimal separation distance between a receiver and a transmitter, obstruction types, obstruction thickness, and transmission interval. In addition, the methodology and experimental results of this paper could be used in the practical design of network topology when hundreds of sensor nodes form a mesh network in the large scale construction applications.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권9호
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• pp.2573-2589
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• 2023

As 5G mobile systems carry multiple services and applications, numerous user, and application types with varying quality of service requirements inside a single physical network infrastructure are the primary problem in constructing 5G networks. Radio Access Network (RAN) slicing is introduced as a way to solve these challenges. This research focuses on optimizing RAN slices within a singular physical cell for vehicle-to-everything (V2X) and enhanced mobile broadband (eMBB) UEs, highlighting the importance of adept resource management and allocation for the evolving landscape of 5G services. We put forth two unique strategies: one being offline network slicing, also referred to as standard network slicing, and the other being Online reinforcement learning (RL) network slicing. Both strategies aim to maximize network efficiency by gathering network model characteristics and augmenting radio resources for eMBB and V2X UEs. When compared to traditional network slicing, RL network slicing shows greater performance in the allocation and utilization of UE resources. These steps are taken to adapt to fluctuating traffic loads using RL strategies, with the ultimate objective of bolstering the efficiency of generic 5G services.

• Structural Engineering and Mechanics
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• 제89권4호
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• pp.383-397
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• 2024

To improve the vibration control performance and applicability of traditional particle tuned mass damper (PTMD) and realize the significant characteristic of lightweight design, this study proposes a novel particle tuned mass inerter system (PTMIS) by introducing inerter system (IS) to the PTMD. In the study, the motion equation of single degree of freedom (SDOF) structure attached with PTMIS is established first, then the variation law of the system's vibration reduction performance (VRP) is discussed through parameter analysis, and it is compared with the PTMD to analyze its VRP advantages. Finally, its vibration reduction (VR) mechanism from the perspective of core control force and energy analysis is explored, and its cavity relative displacement from the application perspective is analyzed. The results show that the PTMIS can remarkably improve the vibration control effectiveness of the PTMD. The reason is that the inerter can store energy and transfer the energy to the cavity and particles, which further stimulates the interaction between the two parts, thereby improving the nonlinear energy consumption effectiveness. Also, the IS can amplify the damping element's energy dissipation efficiency. In addition, the PTMIS can effectively reduce the working stroke of the PTMD, and through the analysis of the lightweight characteristics of the PTMIS, it is found that its lightweight advantage can reach nearly 100%.

• Steel and Composite Structures
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• 제50권4호
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• pp.419-428
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• 2024

Prefabricated partially-encased composite (PEC) structural component is widely used in construction industry due to its superior structural performance and easy assembly characteristic. However, the solid web in traditional PEC components tends to split concrete into two halves, thus potentially reduces structural integrity and requires double concrete pouring. To overcome the above disadvantages, a new PEC beam with open-web π-shaped steel is proposed in this paper. Four open-web PEC beams with varying sectional height, flange thickness and web void rate were constructed and tested under flexural loads. During experimental tests, all beams exhibited typical flexural failure modes with strong moment capacities and excellent ductility. Owing to the unique construction form of web opening, steel-concrete bonding properties were enhanced and very small relative steel-concrete slips were observed. Experimental results also showed that the flexural capacity of such PEC beams increased with the increase of the sectional height and flange thickness, while was not affected by the web void rate. At last, a flexural capacity formula of the open-web PEC beam was proposed based on the whole section plastic rule. The formula results agreed well with experimental results.

• International Journal of Computer Science & Network Security
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• 제24권7호
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• pp.11-23
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• 2024

Triage is a practice of accurately prioritizing patients in emergency department (ED) based on their medical condition to provide them with proper treatment service. The variation in triage assessment among medical staff can cause mis-triage which affect the patients negatively. Developing ED triage system based on machine learning (ML) techniques can lead to accurate and efficient triage outcomes. This study aspires to develop a triage system using machine learning techniques to predict ED triage levels using patients' information. We conducted a retrospective study using Security Forces Hospital ED data, from 2021 through 2023 during Hajj period in Saudia Arabi. Using demographics, vital signs, and chief complaints as predictors, two machine learning models were investigated, naming gradient boosted decision tree (XGB) and deep neural network (DNN). The models were trained to predict ED triage levels and their predictive performance was evaluated using area under the receiver operating characteristic curve (AUC) and confusion matrix. A total of 11,584 ED visits were collected and used in this study. XGB and DNN models exhibit high abilities in the predicting performance with AUC-ROC scores 0.85 and 0.82, respectively. Compared to the traditional approach, our proposed system demonstrated better performance and can be implemented in real-world clinical settings. Utilizing ML applications can power the triage decision-making, clinical care, and resource utilization.

• 한국의류학회지
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• 제48권4호
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• pp.774-792
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• 2024

Unlike traditional retail formats, the metaverse offers diverse shopping experiences, ranging from content that mimics reality to content that transcends reality based on its characteristic of virtuality. This study elaborates on the concept of virtuality within store environments and investigates how the virtuality level of a metaverse store influences consumers' creative consumption by mediating the flow experience. Additionally, it examines the interaction effect of creative product-seeking tendencies and individual characteristics on the relationship between flow experience and creative consumption behavior. A web-based experiment was conducted on young Korean female adults who experienced metaverse shopping. Ninety-one samples were analyzed using exploratory factor and bootstrap analyses with SPSS Macro process Models 4 and 14. The findings demonstrate that store virtuality (low vs. high) increases consumers' purchase intentions of creative fashion items by enhancing their flow toward the shopping experience. Furthermore, the effect of flow experience on creative consumption is strengthened when consumers have low creative product-seeking tendencies. This study contributes to expanding the concept of virtuality in virtual retailing and provides insights for fashion retailers planning to create virtual shopping spaces within the metaverse platform.

• 한국전통조경학회지
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• 제34권3호
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• pp.18-27
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• 2016

건물의 벽이나 담에 여러 가지 문양을 넣은 담장을 '꽃담' 또는 '화초장(花草墻), 화문장(花紋牆)'이라고 한다. 꽃담을 통해서 외적으로는 소유자의 권위, 가치관 등을 짐작할 수 있고, 내적으로는 집안의 안녕과 평화를 기원하는 상징적 의미를 추적할 수 있기도 하다. 그동안 꽃담 관련 연구의 경우 궁궐은 건축, 원예, 미술 디자인 분야 등에서 다양하게 진행된 반면 지역성과 관련한 전통민가와 사찰 관련 연구는 조경분야에서 전무한 상태이다. 이러한 관점에 착안하여 본 연구는 국가 및 도지정 문화재인 전라북도 소재 전통민가와 사찰의 꽃담 사례를 조경적 관점에서 조사, 분석하였다. 전수 조사한 결과 꽃담이 도입된 전통민가 9개소와 사찰 7개소를 중심으로 연구분석하였다. 즉, 전라북도에 산재하는 문화재 16개소를 중심으로 전통민가와 사찰에 나타나는 꽃담의 형태와 기능, 재료, 문양의 상징적 의미를 추적하여 연구결과를 도출하였다. 꽃담은 위치와 형태에 따라 공간기능과 성격이 차별화 되며, 문양의 경우 담장은 물론 합각, 고막이, 굴뚝 등에 다양하게 나타난다. 민가에서는 식물은 물론 문자문양까지 다양한 반면 사찰에서는 불교의 교리와 신앙 등의 의미를 지닌 신앙관련 문양이 주로 나타난다. 상징적으로 민가의 경우 가문과 자손 번영, 벽사, 장수, 길수(吉數) 등이 나타나며, 사찰에서는 불성(佛性)과 극락왕생(極樂往生)을 기원하고 연꽃의 속성을 강조하는 등 의미적 차별성이 표출된다. 결과적으로 본 연구를 통해 향토 조경문화의 올바른 조명, 현대 공간에 꽃담을 모티브로 한 한국적 정취의 표출 가능성, 그리고 꽃담에 대한 인식 제고와 계승 방안 모색을 위한 기초자료 제공 등과 같은 연구 성과를 도출할 수 있었다.

• 한국전통조경학회지
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• 제34권2호
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• pp.1-15
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• 2016

본 연구는 용어의 개념과 차이점을 명료하게 규정하기 어려운 전통 수경(水景) 요소의 쓰임을 고찰하기 위한 목적을 가지고 문헌분석을 위주로 진행되었다. 조선 전기 관찬(官撰) 지리지인 "신증동국여지승람"의 경상도편 "산천" 항목에서 수경과 관련된 지명을 발췌하여 다양한 수경 요소를 파악하고, 사전적 정의와 원문에 대한 해석 및 유사 사례 고찰을 통해서 수경 요소별 특징을 도출하였다. 연구의 결과를 다음과 같이 정리하였다. 1. "산천" 항목에 수록된 수경은 22개 요소였으며, 이를 입지와 물 흐름의 방식에 따라서 하천경관, 호소(湖沼)경관, 해안경관으로 분류하였다. 2. 자연적 물 흐름을 항시 유지하는 하천경관은 물줄기의 위계와 관련된 선적(線的) 형태의 '수(水)', '강(江)', '천(川)', '계(溪)'와 감입곡류하천 특성으로 인해서 형성되는 점적(點的) 형태의 '탄(灘)', '뢰(瀨)', '폭(瀑)', '저(渚)'로 구성된다. 3. 일정 구역에 모인 물 형태를 갖는 호소경관은 '강'의 중하류에 형성된 넓고 잔잔한 지점을 일컫는 '호(湖)', 하천 중상류 유로 상에 자연적으로 형성된 '연(淵)', '담(潭)', '추(湫)', 평지에 모인 물로서 '지(池)', '당(塘)', '택(澤)', 그리고 자연적으로 솟아나는 샘을 지칭하는 '천(泉)', '정(井)'으로 구성된다. 4. 해안경관에는 육지와 섬, 혹은 섬과 섬 사이 공간을 지칭하는 '량(梁)'과 '항(項)', 바다를 향해 돌출된 '곶(串)', 바닷가 모래사장 형태의 '정(汀)', 그리고 도서 지역의 지리적 중요성이 반영되어 높은 출현 빈도를 보인 '도(島)'가 포함된다. 연구 결과를 통해 전통 수경 요소의 다양성을 파악하였으며, 이들이 입지적, 경관적, 기능적으로 차별화된 특징을 반영한 개념이라는 사실을 도출하였다. 이를 통해서 선조들의 자연경관에 대한 관심과 예리한 관찰력으로 형성된 자연에 대한 심미안이 인공을 최소화하고 자연이 주체가 된 우리 전통정원의 특성을 설명할 수 있는 바탕이 된 것으로 이해하였다.