• Journal of Ocean Engineering and Technology
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• v.31 no.3
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• pp.183-188
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• 2017

This paper provides numerical results for the estimation of the efficiency of KRISO energy saving devices in the design stage. A finite volume method is used to solve Reynolds averaged Navier-Stokes (RANS) equations, where the SST k-$\omega$ model is selected for turbulence closure. The propeller rotating motion is determined using a rigid body motion (RBM) scheme, which is called a sliding mesh technique. The numerical analysis focuses on predicting the power reduction by the designed KRISO devices (K-DUCT) under a self-propulsion condition. The present numerical results show good agreement with the available experimental data. Finally, it is concluded that CFD can be a useful method, along with model tests, for assessing the performance of energy saving devices for propulsion efficiency improvement.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.311-315
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• 2005

In this paper, we emphasize the advantage of thermal annealing treatments for improvement characteristics of film bulk acoustic resonator (FBAR) devices. The FBAR devices were fabricated on multi-layer thin films, namely, Bragg reflectors. Sintering and/or annealing processes were applied in our experiments. The measurements confirm once again a considerable improvement of return loss $(S_{11})$ and quality factor $(Q_{s/p})$. these thermal treatment techniques are really promising for enhancing performance of FBAR resonators in industry fabrication of RF devices.

• International journal of advanced smart convergence
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• v.12 no.4
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• pp.119-125
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• 2023

Smart home in the 4th industrial revolution environment is where all devices in the home are connected to each other to provide the optimal living environment desired by the user. Artificial intelligence speakers are being used as a way to manage and control all devices used in this environment. The function of an artificial intelligence speaker ranges from simple music playback to serving as an interface that controls and manages all devices in a smart home space. In this study, we investigated and analyzed the usability of artificial intelligence speakers based on the current status of domestic and overseas markets and the survey contents of two organizations (Korea Consumer Agency and Korea Information and Communication Policy Institute (KISDI)). In addition, we investigated and analyzed the usability of artificial intelligence speakers. Based on the results of responses from users from two related organizations, major problems were derived, and major improvement measures, such as discovering new functions and improving voice recognition performance, were also described.

• The Journal of the Korea Contents Association
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• v.15 no.7
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• pp.664-673
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• 2015

The assistive devices for disabled people are being highlighted even in industrial aspects through the policy and support for disabled people, enactment of regulation for the improvement of accessibility of disabled, technological innovation and product development. Recently, internet access with the sense of touch and hearing and utilizing electronic publishing contents and e-mailing are being convenient through the product of ICT development such as screen reader for visually impaired people, braille display, screen enlarger, text converter and others. Even so, in rapidly changing digital media smart era, the accessibility of visually impaired people is still poor and assistive devices and alternative formats are in need of improvement. Therefore, in aspect of the research and development innovation, this study proposes the implementation directions for improvement of accessibility by analyzing the current situation and structure of alternative formats and assistive devices for visually impaired people. As a result, in the future, various types of digital information are expected to be converted into a customized and realistic forms and distributed through a dedicated disability products or smart devices.

• Proceeding of EDISON Challenge
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• 2014.03a
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• pp.457-458
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• 2014

In this paper, quantum mechanical simulations of the double-gate ultra-thin body (DG-UTB) MOSFETs are performed according to the International Technology Roadmap of Semiconductors (ITRS) specifications planned for 2020, to devise the way for on-current ($I_{on}$) improvement. We have employed non-equilibrium Green's function (NEGF) approach and solved the self-consistent equations based on the parabolic effective mass theory [1]. Our study shows that the [100]/<001> Ge and GaSb channel devices have higher $I_{on}$ than Si channel devices under the body thickness ($T_{bd}$) <5nm condition.

• Proceedings of the ESK Conference
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• 1993.10a
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• pp.15-19
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• 1993

Numerous motivational methodologies were analyzed with respect to improvement of the use of personal protective equipment (PPE) in the industrial field. Common industrial protective devices under consideration included hearing protection devices, respiratory protection devices, eye and face protection devices, etc. It was found that several of such methods could readily be implemented in the real world to protect workers from hazardous industrial sterssors, such as intense noises, toxic air contaminants, and other dangerous industrial objects (e,g., chemicals). Current research issues and recommendations for future research are addressed.

• Journal of the Semiconductor & Display Technology
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• v.22 no.1
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• pp.59-63
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• 2023

Various devices have been emerging as a means of measuring indoor air quality, and among them, there are devices that support real-time remote monitoring through IoT technology and a cloud environment. To improve indoor air quality, based on the results determined by measuring devices, air purifiers or ventilation systems may need to be operated, and temperature and humidity control may be required. In this paper, we propose a design of indoor air quality measuring devices required for indoor air quality evaluation, and of the system needed to control relevant devices to improve indoor air quality through the interaction with the measuring devices. Currently, the servers for the interaction of indoor air quality devices and IoT devices are divided into conventional server type and serverless type, comparing the differences in response time of IoT devices to changes of indoor air quality.

• Journal of Physiology & Pathology in Korean Medicine
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• v.28 no.4
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• pp.430-439
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• 2014

This study was performed to assess the perception and needs of the traditional Korean Medical Equipment (KME) in clinic. We conducted survey research among 15,550 traditional Korean medical doctors (KMD) responded to e-mail during 2 weeks. 899 participants the survey, consisting of questions regarding 'number of devices of the KME' and 'solution and improvement plan of the KME'. The participants were asked to choose their ranking of problems of the KME and also put a check mark in the column that the reasons for this choice. As results, final scores in priority ranking medical devices were derived in 7 categories. Physical therapy equipment and acupuncture treatment devices were included in high ranks. 42.8 % of the participants responded that the diagnostic medical devices seemed important in clinics and 67.4 % of the participants indicated that the therapeutic medical devices seemed to important in clinics. The identified problems of KME were 'low reproducibility and reliability of a diagnosis result (24.8%)' and 'uncertain validity of a diagnostic medical devices (20.5%)'. The improvement plan of the problems were 'to establish the law for using the medical devices (26.6%)' and 'evaluation of validity of the KME (26.2%)'. A survey of KMD revealed the condition of KME's number of devices and the solution plan for the problem of several KMEs. Understanding the needs of KMD could probably contribute to the research and development of KMEs in the future.

• Journal of Korean Public Health Nursing
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• v.37 no.2
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• pp.261-274
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• 2023

Purpose: This study aims to understand the current use of and demand for assistive eating devices. These device improve the self-feeding abilities in older adults. Methods: This study used a cross-sectional study design. Descriptive statistics were performed using SPSS 22.0 for Windows. The survey participant of 282 older people(47.7%), 42 family caregivers(7.4%), and 266 staff members(44.9%). Results: Whereas most of the older adults living in their home(87.3%) did not experience difficulty while eating, older adults residing in facilities(26.4%) expressed difficulty with the process of putting food into a spoon. The difference between the two groups was statistically significant(p<.001). Wile the older adults living in home considered assistive eating devices(34.5%) as the most important requirement for self-feeding, older adults in facilities considered receiving help(39.3%) as their biggest requirement(p<.009). Older adults, family caregivers, and nursing home staff were not familiar with assistive eating devices and were not aware of their necessity. Conclusion: The study could help increase awareness about assistive eating devices and the importance of self-feeding in research and nursing educational settings. Improvement in self-feeding ability may future enhance the daily quality of life of older adults.

• Journal of The Korean Association of Information Education
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• v.18 no.4
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• pp.483-490
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• 2014

Smart classrooms have been set up nationwide to utilize smart devices for teaching and learning in the knowledge- based society, As this trend might quickly spread, we have investigated the utilization levels, and issues around the facilities from the experienced teachers. In order to study the impact of easy access to smart devices, the teacher sampling groups were divided into two: one teacher group responsible for smart classrooms and the other group teaching in ordinary classrooms. Survey questions dealt with teacher needs analyses, their expectation of their students' attitude changes, their satisfaction and utilization levels of smart devices currently built in classrooms. The results showed us that teachers have vague expectation about the smart devices and want more highly applicable devices for instruction, improvement of their compatibility with other multimedia devices or applications as well as to improve the resolution of electronic boards. and basic functions of information search and videos that they use everyday.