• 한국간호교육학회지
• /
• 제23권3호
• /
• pp.319-329
• /
• 2017

Purpose: This study evaluated the acquisition and retention effects on diabetes knowledge and academic self-efficacy of patient simulation-based hypoglycemia scenario using a high-fidelity simulator. Methods: A nonequivalent control group pretest/posttest repeated measures quasi-experimental design determined if nursing simulation using a high-fidelity simulator helps students acquire and retain diabetes knowledge and academic self-efficacy. A total of 101 nursing students from two universities participated in this study, comprising the experimental and control groups. The experimental group (n=52) at a university in S city comprised participants in an adult nursing class, nursing practicum, and simulation education. The control group (n=49) at a university in C city participated in an adult nursing class and nursing practicum without simulation education. Results: The experimental group had statistically significant group-time interaction effects on diabetes knowledge (p=.044) and self-confidence (p<.001) of academic self-efficacy compared to the control group. Conclusion: The results indicated that the patient simulation-based hypoglycemia scenario using a high-fidelity simulator applied to nursing education is useful in encouraging nursing students to engage in strategies with acquisition and retention effects, enhancing their diabetes knowledge and self-confidence of academic self-efficacy. Therefore, educators should use simulation programs effectively with nursing classes and practicum to enhance the effects of nursing competencies.

• 대한산업공학회지
• /
• 제35권2호
• /
• pp.141-149
• /
• 2009

As the number of personal computers installed in vehicles increases, a touchpad often used in a labtop computer can be used for the control of an in-vehicle information system (IVIS). Using a touchpad to control the system allows the user to select among large amount of information with a single touch of dragging. For safety and convenience of a driver, the touchpad could be placed on a steering wheel. This research is designed to calculate the most efficient Control-Response Ratio (C/R ratio) for the menu interaction of a touchpad on a steering wheel. Since the menu pointer's rate of movement and proper C/R ratio is determined by the amount of selected information, the amount of displayed information and the movement of a menu pointer was chosen to be independent variables. The dependent variables are a user's preference and task completion time. Two factor full factorial within subject design was used 16 subjects. The investigation revealed that the amount of selected information increased with increasing C/R ratio. The movement of the pointer became slower as the amount of information increased. The best C/R ratio was calculated for each amount of information and preference regression of the user's preference was drawn accordingly. Through this research, the automobile interior designer can benefit from the guidelines suggested for the touchpad control.

• 한국정보전자통신기술학회논문지
• /
• 제11권4호
• /
• pp.379-387
• /
• 2018

IoT 생태계가 다양한 사용자들에 의하여 폭넓게 사용되기 위해서는 디바이스, 플랫폼과 사용자와의 상호작용 및 이에 대한 사용자 경험이 향상되어야 한다. 본 연구에서는 사용자들이 IoE (Internet of Everything) 플랫폼에서 디바이스와 서비스들을 보다 효과적으로 사용할 수 있도록 지원하기 위한 웹 기반 룰 엔진 시스템을 제안한다. 제안하는 시스템은 센서, 액추에이터, 외부 서비스 기반의 규칙 기반 시나리오를 직관적으로 생성하고 관리하기 위한 웹 인터페이스 및 UI 컴포넌트와 이를 통하여 생성된 규칙들을 Nools 룰 엔진에 적합하게 자동으로 변환하고 관리하기 위한 룰 관리 모듈로 구성되어 있다. 마지막으로, 본 논문에서는 각종 IoT 디바이스와 외부 서비스들의 룰 기반 응용 시나리오 동작 시연을 통하여 제안하는 시스템의 활용 가능성과 유용성을 보였다.

• 한국정보전자통신기술학회논문지
• /
• 제11권4호
• /
• pp.370-378
• /
• 2018

네트워크 인프라 환경과 센서 및 IoT 디바이스 기술의 발전에 따라 사용자나 건물, 환경에 대한 모니터링 및 이에 따른 상호작용 기술에 대한 연구 개발이 활발히 진행되고 있다. 특히, 사회적 약자인 노인, 장애인, 어린이들과 관련된 모니터링 기술에 대한 수요가 급증하고 있다. 본 연구에서는 IoT 케어 로봇 기반의 효율적인 병실 관리 시스템을 제안한다. IoT 디바이스와 클라우드 기반 플랫폼을 활용함으로써 보다 효율적이고 직관적으로 병실의 상태를 확인하고 제어할 수 있다. 본 연구에서는 ARTIK 디바이스와 ARTIK Cloud 플랫폼 기반의 프로토타입 구현을 통하여 제안하는 시스템의 활용 가능성을 확인하였으며, 센서 정보 수집 및 경고 상황 대응에 각각 약 600ms와 130ms가 소요되어 제안하는 시스템이 실시간으로 동작 가능함을 확인하였다.

• 한국안전학회지
• /
• 제32권5호
• /
• pp.41-46
• /
• 2017

The coefficient of derailment and the rate of wheel load reduction were used as the index of train running safety that was directly affected the train derailment safety. In aspects of track, the train running safety depends on the complex interaction between wheel and rail, and the track-vehicle conditions (i.e., the curvature, cant, track system, vehicle speed and the operation conditions, etc). In this study, the relationship between the train running safety and the track curvature and vehicle speed for direct fixation concrete tracks currently employed in Korean light rapid transit was assessed by performing field tests using actual vehicles running along the service lines. The measured dynamic wheel load, lateral wheel load and lateral displacement of rail head were measured for same train running on four tested tracks under real conditions, which included curved and tangent tracks placed on the tunnel and bridge, thus increasing the train speed by approximately maximum design speed of each test site. Therefore, the measured dynamic track response was applied to the running safety analysis in order to evaluate the coefficient of derailment, the rate of wheel load reduction and the track gauge widening at each test site, and compare with the corresponding Korean train running safety standard. As the results, the lateral track response of direct fixation concrete track appeared to increase with the decreased track curvature; therefore, it was inferred that the track curvature directly affected the train running safety.

• Asian-Australasian Journal of Animal Sciences
• /
• 제16권8호
• /
• pp.1137-1142
• /
• 2003

In a balanced incomplete block design, two dry Holstein cows were used to investigate the effect of $\beta$ 1-4 galactooligosaccharides (GOS) supplementation on nitrogen (N) utilization, rumen fermentation and microbial N supply in the rumen. During the experiment, cows were fed four diets: orchardgrass (Dactylis glomerata L.) silage (OS), OS with GOS supplementation (OSG), OS mixed with alfalfa (Medicago sativa L.) silage (MS) and MS with GOS supplementation (MSG). GOS was supplemented at 2% of dry matter intake. Diets were fed at maintenance level of protein and energy. Results showed that N digestion was affected by silage and interaction of silage and GOS supplementation. Cows fed OSG had the highest N digested (p<0.05) followed by MS, OS and MSG. Supplementation of GOS to OS or MS diets tended to improve N utilization through reducing the N losses on dairy cows. There was no effect of GOS supplementation on rumen fermentation parameters (i.e. pH, $NH_3$-N and total VFA) at 1 h and 6 h after feeding. Compared to cows fed MS, cows fed OS silage had higher (p<0.05) allantoin excretion (80.8 vs. 67.1 mmol/d) and higher (p<0.05) total purine derivatives excretion (92.9 vs. 78.5 mmol/d). The microbial N supply in cows fed OSG was higher (p<0.05) than those fed OS, MS and MSG.

• Asian-Australasian Journal of Animal Sciences
• /
• 제25권8호
• /
• pp.1117-1123
• /
• 2012

The effect of duckweed (DW) supplementation was evaluated on dry matter intake (DMI), presence and duration of estrus, percentage of ewes repeating estrus and pregnancy rate, as well as the concentration of progesterone ($P_4$) in multiparous crossbred ewes from Pelibuey, Dorper, and Katahdin breeds, fed with Taiwan grass hay (TWH). Eighteen ewes with $39.7{\pm}4kg$ mean body weight, kept in individual pens, were randomly assigned to one of the following treatments: $T_1$: TWH, $T_2$: TWH plus 200 g DW, $T_3$: TWH plus 300 g DW. The ewes were synchronized with 40 mg fluorogestone acetate (FGA) and 400 UI equine chorionic gonadotropin (eCG). Data were analyzed as a completely randomized design using the GLM procedure. DW supplementation had no effect on dry matter intake (p>0.05); however, a slight decrease of TWH intake was observed as DW supplementation increased. No differences (p>0.05) were found in the beginning of estrus, percentage of ewes presenting it, its duration, or pregnancy rate. There were no differences (p>0.05) on $P_4$ concentration among treatments, or $treatment{\times}period$ interaction (p>0.05). However the period was significant (p<0.01), since the $P_4$ levels increased as time increased after the removal of the FGA device and eCG application.

• 한국전산유체공학회지
• /
• 제19권2호
• /
• pp.66-71
• /
• 2014

Aerodynamic design of a vehicle has very important meaning on the fuel economy, dynamic stability and the noise & vibration of a moving vehicle. In this study, the correlation of aerodynamic effect between two model vehicles moving inline on a road was studied with the basic SAE model vehicle. Drag and lift are two main physical forces acting on the vehicle and both of them directly effect on the fuel economy and driving stability of the vehicle. For the research, the distance between two vehicles is varied from 5m to 30m at the fixed vehicle speed, 100km/h and the side-wind was assumed to be zero. The main issue for this numerical research is on the understanding of the interaction forces; lift and drag between two vehicles formed inline. From the study, it was found that as the distance between two vehicles is closer, the drag force acting on both the front and rear vehicle decreases and the lift force has same trend for both vehicle. As the distance(D) is 5m, the drag of the front vehicle reduced 7.4% but 28.5% for the rear-side vehicle. As the distance is 30m, the drag of the rear vehicle is still reduced to 22% compared to the single driving.

• 한국의류산업학회지
• /
• 제16권5호
• /
• pp.730-744
• /
• 2014

With advances in QR code, mobile is becoming one of important channels in the fashion retail industries. This study attempts to understand the importance of QR code utilization in creating multi-channel business model. Study objectives are to classify types of multi-channel retailing by QR code utilization and to explore the role of QR code technology in strategic marketing elements for types of multichannel retailer. As an exploratory approach, a total of 78 news articles regarding QR code issues were reviewed and analyzed by focusing on 48retailers seleted in this study. The results found seven dimensions of QR code marketing strategies: abundant product information, additional information contents, transaction accessibility, connectedness to channels, location based service, loyalty program and multimedia advertising. Based a combination of channels and level of mobile apps' activation, multichannel retailers utilizing QR code technology were classified into four types; bricks-click-active mobile model, bricks-click-inactive mobile model, bricks-click model, and click-active mobile model. There were differences of using QR code marketing strategies among multichannel models. According to results, for bricks-and-mortar retailers, QR code was critical to integrate shopping experience with merchandise or sales promotions across channels. In addition, for non-store retailers, the QR code utilization was successful in expanding mobile channels, which can promote retail sales by a two-way interaction with customers via the mobile apps.

• 유통과학연구
• /
• 제16권2호
• /
• pp.83-88
• /
• 2018

Purpose - For distribution corporate, the method of recognizing sales revenue may be different depending on the type of distribution transaction. Until the change in accounting standards for revenue recognition was made in 2002, the distribution corporate recognized the full amount of sales of goods regardless of the type of transaction. However, in accordance with accounting standards for revenue recognition, which began to be applied in 2003, distribution corporate differ in sales revenue recognition by transaction type. The Purpose of this study is to analyze the impact of sales revenue on the corporate value after the change of the revenue recognition accounting standards. Research design, data, and methodology - We selected a comprehensive wholesale and retail corporate listed on Korea Exchange. The research model extends the Ohlson(1995) model and regresses whether sales revenue affecting the corporate value is discriminatory value relevance between the corporate affected by changes in accounting standards for revenue recognition and those not. Results - The results of the analysis are as follows. First, The average value of stock price, net asset per share, and earnings per share are all higher than those before the change of accounting standards for revenue recognition. However, the average value of sales per share is lower than that before the change of accounting standards for revenue recognition. Second, the relationship between corporate value and net asset per share, earnings per share and sales per share, the coefficient of net asset per share, earnings per share and sales per share are all statistically significant positive value. Therefore, in explaining corporate value, besides net asset per share and earnings per share, sales per share provides additional information. And the coefficient of interaction variable between accounting standard change and sales per share is a statistically significant positive value. This result indicating that after the change of the revenue recognition accounting standards the usefulness of sales revenue has increased. Conclusions - The change in accounting standards for revenue recognition led to a decrease in distribution corporate sales revenue but the higher the relevance of the corporate value of the sales revenue information. These results shows that the change of accounting standards that reflects the transaction type of retailers was a revision to increase the value relevance of sales revenue in valuation of corporate value.