• 대한인간공학회지
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• 제28권3호
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• pp.87-94
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• 2009

The aim of the study is to investigate the usability of wheel navigation key(WNK) recently adopted for the new models of mobile phone and MP3 product. In this study, an experiment was designed to evaluate the functional benefit of WNK by using a performance test. A questionnaire was also used to examine the personal preference. In results, a significant difference was found in performance time between wheel-type and button-type product. In general, the difference was more significant as subject's skill level was higher. In particular, the performance time was significantly shortened with the WNK when a searching task was required, but push button was an effective interface for simple search task among beginners. Therefore, the wheel navigation key can be used to improve the usability of product by reducing the searching time in mobile phone and mp3. For practical application, the user's level of skill needs to be considered to maximize the effect of interface when choosing WNK or push button.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2005년도 춘계학술대회 논문집
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• pp.66-70
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• 2005

The full automation of welding has not yet been achieved partly because the mathematical model for the process parameters of a given welding task is not fully understood and quantified. Several mathematical models to control welding quality, productivity, microstructure and weld properties in arc welding processes have been studied. However, it is not an easy task to apply them to the various practical situations because the relationship between the process parameters and the bead geometry is non-linear and also they are usually dependent on the specific experimental results. Practically, it is difficult, but important to know how to establish a mathematical model that can predict the result of the actual welding process and how to select the optimum welding condition under a certain constraint. In this paper, an attempt has been made to develop an neural network model to predict the weld top-bead height as a function of key process parameters in the welding. and to compare the developed model and a simple neural network model using two different training algorithms in order to select an optimal neural network model.

• 한국응급구조학회지
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• 제22권1호
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• pp.73-82
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• 2018

Purpose: The purpose of this study was to compare the tidal volumes and airway pressures of 3 mask-sealing methods (one hand C-E, two hands C-E, and one hand O-E) for ventilation treatment. Methods: The study subjects were 45 paramedic students. Tidal volume was measured for the three sealing methods by setting a ventilator, connecting it to the masks for 2 minutes, and using Respi-trainer software. Results: Regarding general characteristics, the group of men, in upper grades, and with practical training experience and experience and experience in the implementation of bag-valve-mask ventilation provided higher tidal volumes. Regarding physical characteristics, larger hands and greater grip strength correlated with higher tidal volume. Two hands C-E generated the highest tidal volume of $483.78{\pm}34.14mL$, one hand O-E generated $449.59{\pm}51.09mL$ and one hand C-E generated $394.31{\pm}68.95mL$. Conclusion: Means of tidal volumes were statistically significantly different based on mask sealing methods (p<.001). Two hand C-E was performed by the two-persons task and was suggested as the most effective method. For the one-person task, one hand O-E was the more effective method compared to the previous one hand C-E.

• 한국통신학회논문지
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• 제36권6B호
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• pp.663-673
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• 2011

휴대전화를 통한 2D(Two Dimensional) 이미지 인식기반의 QR(Quick Response)코드 및 칼라코드 활용이 급속히 확산되면서 디코딩 기술과 플랫폼의 개선이 요구되고 있으며, 범용 디지털카메라에 의한 소형 비주얼코드의 비 초점 이미지정보 인식기술인 새로운 보코드(Bokode)라는 기술이 발표되었다. 이에 스마트환경 기반의 2D 이미지코드와 인식기술에 대한 연구개발 및 산업 활성화를 위한 대응전략이 절실히 필요한 시점이다. 논문은 이 같은 전략수립을 지원하기 위해 기술 및 산업동향 조사 분석을 통한 정보지원 및 실천과제 제시에 중점을 두며 기술개요 기술동향, 기술 활성화 과제, 전망 및 제안 등으로 구성하였다.

• 한국군사과학기술학회지
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• 제11권4호
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• pp.59-67
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• 2008

In the next near future, the human would like to use the small unmanned ground vehicle(SUGV) on the diverse fields. Specially the world of today is tried to apply with operating the task on very difficult working environments such as some dangerous or unreachable area. To work this task, this vehicle should be guaranteed with the high level of reliability, safety, and performance. In this paper, we propose to focus on not only the functional requirements, but also the non-functional requirements based on software architecture at the design stage for developing the embedded system. Through focusing on the non-functional requirements on this software architecture, we can obtain the design goal of the target system and also show the enhancement of reliability, safety and performance with 'Vtune' performance analysis tool.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권1호
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• pp.229-240
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• 2012

Advances in MEMS and CMOS technologies have motivated the development of low cost/power sensors and wireless multimedia sensor networks (WMSN). The WMSNs were created to ubiquitously harvest multimedia content. Such networks have allowed researchers and engineers to glimpse at new Machine-to-Machine (M2M) Systems, such as remote monitoring of biosignals for telemedicine networks. These systems require the acquisition of a large number of data streams that are simultaneously generated by multiple distributed devices. This paradigm of data generation and transmission is known as event-streaming. In order to be useful to the application, the collected data requires a preprocessing called data fusion, which entails the temporal alignment task of multimedia data. A practical way to perform this task is in a centralized manner, assuming that the network nodes only function as collector entities. However, by following this scheme, a considerable amount of redundant information is transmitted to the central entity. To decrease such redundancy, data fusion must be performed in a collaborative way. In this paper, we propose a collaborative data alignment approach for event-streaming. Our approach identifies temporal relationships by translating temporal dependencies based on a timeline to causal dependencies of the media involved.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권2호
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• pp.383-403
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• 2021

With the development of mobile edge computing (MEC), some late-model application technologies, such as self-driving, augmented reality (AR) and traffic perception, emerge as the times require. Nevertheless, the high-latency and low-reliability of the traditional cloud computing solutions are difficult to meet the requirement of growing smart cars (SCs) with computing-intensive applications. Hence, this paper studies an efficient offloading decision and resource allocation scheme in collaborative vehicular edge computing networks with multiple SCs and multiple MEC servers to reduce latency. To solve this problem with effect, we propose a context-aware offloading strategy based on differential evolution algorithm (DE) by considering vehicle mobility, roadside units (RSUs) coverage, vehicle priority. On this basis, an autoregressive integrated moving average (ARIMA) model is employed to predict idle computing resources according to the base station traffic in different periods. Simulation results demonstrate that the practical performance of the context-aware vehicular task offloading (CAVTO) optimization scheme could reduce the system delay significantly.

• 지식경영연구
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• 제23권2호
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• pp.83-98
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• 2022

본 연구는 메타버스에서의 사용자 인터페이스에 따른 미디어 풍요성, 그리고 이에 따른 사용자의 경험을 메타버스 내에서 사용자의 객관적인 퍼포먼스, 사용자의 주관적인 사용자 인터페이스 인식, 현존감, 그리고 사용자가 느낀 즐거움이라는 측면에서 다각적으로 분석한다. 2(UI 상호작용성: HUD vs. 고정 UI) × 2(시각적 단서: 유 vs. 무 )그룹내 반복측정 실험 결과, 사용자들은 시각적 단서가 존재할 때 객관적인 지표와 주관적인 지표 모두 보다 긍정적으로 나타났다. 또한, 메타버스 사용자가 경험한 즐거움에 있어서 인터페이스에 대한 유용성에 대한 인식의 유의미한 매개효과가 발견됐다.

• 한국의료질향상학회지
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• 제30권1호
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• pp.153-164
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• 2024

The second National Patient Safety Comprehensive Plan was developed in 2023. In this, national-level patient safety education is designated as the fifth core task, with the establishment of an educational system for preliminary healthcare professionals included as a detailed task. The foundation for providing patient safety education to preliminary healthcare professionals has now been established. In 2011, the World Health Organization (WHO) published standard guidelines for patient safety education for healthcare professionals. This study introduces the WHO's 'Patient Safety Curriculum Guide: Multi-professional Edition' and shares the experiences and cases of patient safety education conducted for nursing students-that is, future nurses-according to these guidelines. The patient safety and nursing course was designed as an elective in the second semester of the third year. Before the class was conducted, only 6.9% of the students were familiar with the concept of patient safety. Of the 11 WHO topics, this course covers nine (excluding infection control and medicine safety) and is divided into seven modules. Three modules consist of lectures only, whereas the remaining modules involve practical training. To practice patient safety, it is essential for all healthcare professionals to acquire knowledge regarding patient safety during their undergraduate curriculum. This study aimed to provide foundational information regarding patient safety education for nursing and other healthcare students who have not yet undergone patient safety training.

• International journal of advanced smart convergence
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• 제13권2호
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• pp.154-165
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• 2024

The purpose of this study is to investigate the relationship between organizational culture (innovation culture, relationship culture, hierarchy culture, task culture) as perceived by organizational members and its impact on organizational justice and job performance. This contributes to providing additional data for the revitalization and development of the organizational system for efficient management and operation measures included in the organization's sustainable management. To this end, the hypothesis established through the traditional process of quantitative research was tested as follows. First, organizational culture showed a positive effect on organizational justice. Second, organizational culture had a positive (+) effect on job performance. Third, organizational justice was significantly analyzed in terms of job performance. In other words, the importance of systematic re-establishment and continuous implementation of organizational culture (innovation culture, relationship culture, hierarchy culture, task culture) and organizational justice consistent with organizational characteristics was emphasized in order to improve job performance, which is the result of organizational competitiveness. In addition, it is the aspect of drawing practical implications for strategic human resource management and human resource development to systematically improve it.