• 한국치위생학회지
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• 제19권2호
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• pp.195-206
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• 2019

Objectives: The purpose of this study was to provide the basic data that can help the development and quality management of effective continuing education programs by analyzing the status and demand of continuing education contents for dental hygienists. Methods: The questionnaire had 30 questions, which included 5 questions on general characteristics, 4 on continuing education status, 3 on online continuing education, and 18 on desired continuing education. The survey was conducted for the members attending continuing education programs in 2018. Results: The mean age of the participants was 30.08 years, with an average career of 8.19 years. The continuing education was highly recognized, through the homepage of the association (52.5%); as speakers for continuing education, dental hygienists in the field of specialization were preferred (45.8%). Additionally, the preferred frequency of programs was twice a year (45.7%). For promoting continuing education, the use of mobile phone letter was preferred (65.8%). Moreover, 92.9% of respondents were aware of online continuing education, 49.9% had experience in online continuing education, and 59.9% said that they will actively use smart devices in the future. The requirement for the contents of continuing education was the highest at 4.34 points for health insurance cost and the lowest at 2.75 points for liberal arts classes. Conclusions: To provide effective continuing education, it is necessary to develop a customized continuing education program considering various variables, such as career, work place, and career break experience, thus reflecting the systematic requirement of surveys according to each characteristic.

• Asia Pacific Journal of Business Review
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• 제3권1호
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• pp.57-76
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• 2018

The "Internet of things" (IoT) is becoming an increasingly growing topic of conversation, it is a new emergent technology that can be present in almost every field and application. It's a concept that not only has the potential to impact how people live but also how people work. Broadband Internet and Mobile Internet are becoming more widely available, the cost of the service is decreasing, more devices are being created with Wi-Fi capabilities and sensors built into them, technology costs are going down, and smartphone penetration is growing so fast. All of these facts are creating the best environment for the IoT applications. In a country like Ecuador, is important to have a previous analysis about the feasibility of the implementation of this new technology in order to know what are the challenges the country has to face, and also to not stay behind as the other countries in the region are advancing. Currently, this kind of analysis does not exist. The Internet of Things is an innovation where business and technology models in Ecuador are relatively unexplored. The current infrastructure deployed in Ecuador and the available devices in the market are the central facts to initiate with the research, which is a starting point to show if Ecuador is ready to this technology, and if is not ready what is missing. This study shows the current telecommunications status in Ecuador, and its strengths and weaknesses to start the deployment of Internet of Things. Besides, it also will show the most likely applications that can be easily adopted for the Ecuadorian market with its respective availability, affordability, and adaptability.

• 스마트미디어저널
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• 제8권1호
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• pp.67-73
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• 2019

본 연구는 4차 산업혁명 시대 직업교육에 대응하기 위하여 핵심역량 중 직무능력을 향상 시킬 수 있는 액티브러닝과 퍼실리테이션(Active Learning&Facilitation) 융합 교육프로그램을 연구하였다. 연구방법으로는 '문제해결 능력'을 키워주는 Active Learning의 장점과 창의적 아이디어 발상을 위한 Facilitation의 장점을 융합하여 앱 디자인 교과목에 적용하고 학생들의 만족도 조사를 통해 교육의 효과성을 검증하였다. 모바일 환경에 익숙한 학생의 특성을 반영하여 앱 콘텐츠를 기획하고, 데이터 시각화를 위한 UI 디자인을 수행하여 S/W분야의 스킬을 강화할 수 있도록 하였다. 모든 수행과정은 팀 프로젝트(PBL)로 운영되었다. 연구결과 액티브러닝과 퍼실리테이션 융합 교육프로그램은 전문대학교육이 요구하는 foundation skills, competencies을 향상할 수 있었다. 더불어 산업현장과 대학 간 교육격차를 줄일 수 있을 것으로 기대한다.

• 방송공학회논문지
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• 제26권2호
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• pp.132-142
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• 2021

본 연구는 실생활에서 가장 많이 접할 수 있는 모바일 전면 카메라를 이용하여 심장박동, 심장박동 변이율, 산소포화도, 호흡도, 스트레스수치, 혈압을 측정할 수 있는 효과적인 방법론을 제시하는 것이 목적이다. Blaze Face를 이용하여 실시간으로 얼굴인식을 진행하여 안면 이미지 데이터를 취득하고 눈, 코 입, 귀의 특징 점을 이용하여 이마를 관심영역으로 지정하며 평균값을 시간 축으로 정렬한 후 생체징후 측정에 이용하였다. 생체징후 측정 기법은 fourier transform을 기본으로 이용하였으며, 측정하고자 하는 생체징후에 맞게 노이즈 제거 및 필터 처리함으로써 측정값의 정확도를 향상 시켰다. 결과를 검증하기 위해 접촉식 센서와 비접촉식 센서 비교를 진행하였다. 분석 결과 안면 이미지를 이용하여 심장박동, 심장 박동 변이율, 산소포화도, 호흡도, 스트레스, 혈압 총 여섯 가지 생체 징후를 추출 할 수 있는 가능성을 확인하였다.

• 인터넷정보학회논문지
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• 제20권5호
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• pp.67-77
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• 2019

Today, companies are making efforts to improve the performance of workers by utilizing various IT-based mobile and internet devices. In pharmaceutical companies, salespeople are using the e-brochure to search for diverse expertise in real time. Through the e-brochure, pharmacists and doctors can be provided with the information they need, thereby increasing confidence in pharmaceuticals and salespeople. Salespeople can also use e-brochures to improve their work performance and to be more satisfied with their jobs. This study examines which functions of e-brochures satisfy salespeople and what attitudes to the e-brochures they need to have. This paper explains the effect of satisfaction and attitude to the e-brochures on job satisfaction through self-efficacy with statistical analysis. As a statistical result, the functions of e-brochures (professional knowledge, massive amount of data, easy searching, information updates, and the reflection of feedback) and attitudes to the e-brochures (importance, intention to use, belief in improvement, efficacy to use, and negative cognition) influence on self-efficacy of salespeople. Further, self-efficacy has mediating effects on the relationship between the functions of e-brochures / attitudes to e-brochures and job satisfaction. Exceptionally, the mediating effect of self-efficacy was not significant in relation to information updates / reflection of feedback and job satisfaction. These results will explain what functions should be focused for the future development of e-brochures. It will also suggest what attitudes the salespeople should have about e-brochures. Through these efforts, salespeople will be able to utilize new technology of e-brochures to satisfy their jobs and improve their performance.

• 정보보호학회논문지
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• 제22권3호
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• pp.505-514
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• 2012

싸이월드, 페이스북과 같은 소셜 네트워킹 서비스는 개인적인 데이터를 지인들과 공유하는데 매우 유용하다. 이들은 대부분 중앙 집중형 서버를 기반으로 하는데, 이 같은 시스템은 사용자들의 모든 통신 내역이 서버에게 노출된다는 단점을 가진다. 이러한 문제점을 개선하기 위해서 p2p 시스템에 착안한 분산된 소셜 네트워킹 서비스와 그 안에서 타인의 데이터에 접근하는 것을 제어하는 연구가 진행 중이다. 기존의 접근제어 기법에서는 신뢰하는 제 3기관이 필요하거나 프로토콜에 참여하는 모든 사용자들이 온라인 상태여야 하고, 사용자들이 분산된 방식으로 구축한 소셜 네트워크가 서버에게 노출되는 단점이 존재했다. M. Atallah 등은 처음으로 암호학적인 키 관리 기법을 활용해서 기존의 기법들이 지닌 문제점을 모두 해결했지만, 제안된 기법이 매우 비효율적이라는 한계가 있었다. 본 논문에서는 이 기법이 가진 비효율을 분석하고, 키 관리 기법이 아닌 대칭키 기반의 환형(circular) 암호를 최초로 적용하여 효율적인 접근제어 기법을 제안한다. 제안하는 기법은 온라인 상에 구축된 소셜 네트워크를 통해서 사용자 데이터에 대한 접근을 분산된 방식으로 제어하고, 서버가 그 네트워크를 추론할 수 없도록 기존의 기법보다 향상된 효율성과 안전성을 제공한다.

• 정보보호학회논문지
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• 제22권6호
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• pp.1243-1252
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• 2012

최근 모바일 스마트 기기의 보편화로 인하여 사용자 인터페이스로부터 개인 정보를 직접 획득하는 유형의 공격(숄더 서핑 공격, 레코딩 공격 등) 위협이 크게 증가하고 있다. 이러한 공격 가능성 및 안전성에 대한 체계적 평가를 위해 정형화된 안전성 분석 모델이 필요하지만, 이에 적합한 모델이 존재하지 않는다. 본 논문에서는 모바일 스마트 기기환경의 안전성 및 사용성 분석 모델인 STM-GOMS 모델을 제안한다. STM-GOMS 모델은 HCI 인지 모델을 안전성 분석에 처음으로 활용한 이전 연구 사례를 메모리 한계 관점에서 개선한 GOMS 기반 모델로 인증 기법의 사용성과 안전성 평가가 가능하다. 본 논문에서는 현재 스마트 기기에서 사용 중인 패스워드 입력 기법을 STM-GOMS 모델로 분석하여 사용성과 숄더 서핑 공격에 취약함을 보이고 이를 실험을 통해 검증한다.

• International Journal of Computer Science & Network Security
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• 제21권6호
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• pp.23-28
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• 2021

The article discusses the features of adaptation of the parameters of the physical layer of data transmission in self-organizing networks based on unmanned aerial vehicles operating in the conditions of "smart cities". The concept of cities of this type is defined, the historical path of formation, the current state and prospects for further development in the aspect of transition to "smart cities" of the third generation are shown. Cities of this type are aimed at providing more comfortable and safe living conditions for citizens and autonomous automated work of all components of the urban economy. The perspective of the development of urban mobile automated technical means of infocommunications is shown, one of the leading directions of which is the creation and active use of wireless self-organizing networks based on unmanned aerial vehicles. The advantages of using small-sized unmanned aerial vehicles for organizing networks of this type are considered, as well as the range of tasks to be solved in the conditions of modern "smart cities". It is shown that for the transition to self-organizing networks in the conditions of "smart cities" of the third generation, it is necessary to ensure the adaptation of various levels of OSI network models to dynamically changing operating conditions, which is especially important for the physical layer. To maintain an acceptable level of the value of the bit error probability when transmitting command and telemetry data, it is proposed to adaptively change the coding rate depending on the signal-to-noise ratio at the receiver input (or on the number of channel decoder errors), and when transmitting payload data, it is also proposed to adaptively change the coding rate together with the choice of modulation methods that differ in energy and spectral efficiency. As options for the practical implementation of these solutions, it is proposed to use an approach based on the principles of neuro-fuzzy control, for which examples of determining the boundaries of theoretically achievable efficiency are given.

• 대한방사선기술학회지:방사선기술과학
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• 제44권3호
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• pp.205-210
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• 2021

The purpose of this study was to analyze the spatial dose according to the distance by location of medical workers when using a mobile X-ray fluoroscopy device in the operating room through a simulation experiment. The MCNPX program was used for the simulation, and the location of medical workers was set around the operating table, and the spatial dose distribution according to the distance and changes in imaging conditions was evaluated. As a result, The highest score was 2.74×10^-4 mGy, 2.72×10^-4 mGy, and 1.18×10^-4 mGy based on the 10 cm distance from the operating table. Spatial dose depending on the distance 100cm, A point 5.15×10^-5 mGy is decreased 19% of 10cm, D point 5.12×10^-5 mGy, 19 % of 10cm, and G pint, 1.73×10^-5 mGy is reduced by 15% of 10cm. Based on this study, medical-related workers directly or indirectly participating in surgery carry potential risks of radiation exposure during surgery, but there are difficulties in radiation protection due to the nature of their work. Therefore, efforts to reduce exposure suitable for the operating room environment will be required.

• Journal of Astronomy and Space Sciences
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• 제38권1호
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• pp.1-21
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• 2021

The observation of stellar occultations constitutes one of the most important techniques for determining the dimensions and establishing the physical parameters of small Solar System bodies. The most substantial calculations are obtained from multiple observations of the same event, which turns the observation of stellar occultations into highly collaborative work and groups teams of observers through international networks. The above situation also requires the participation of both professional and amateur observers in these collaborative networks. With the aim of promoting the participation of professional and amateur groups in the collaborative observation of stellar occultations, we present the methodology developed by the Astronomical Observatory of the Technological University of Pereira (OAUTP) for the observations of occultations due small Solar System bodies. We expose the three fundamental phases of the process: the plan to make observations, the capture of the events, and the treatment of the data. We apply our methodology using a fixed station and a mobile station to observe stellar occultations due to MBAs (354) Eleonora (61) Danae (15112) Arlenewolfe (3915) Fukushima (61788) 2000 QP181 (425) Cornelia (257) Silesia (386) Siegena and (41) Daphne, and due to TNOs 1998BU48 and (529823) 2010 PP81. The positive detections for the objects (257) Silesia (386) Siegena and (41) Daphne allow us to derive lower limits in the diameter of the MBAs of 63.1 km, 166.2 km and 158.7 km and offsets in the astrometric position (Δαc cos��c, Δ��c) of 622.30 ± 0.83, 15.23 ± 9.88 mas, 586.06 ± 1.68, 43.03 ± 13.88 mas and -413.44 ± 9.42, 234.05 ± 19.12 mas, respectively.