• 디지털산업정보학회논문지
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• 제15권2호
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• pp.43-52
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• 2019

The recent technological developments of smart devices, multiple services are provided to enhance the users' quality of life including smart city, smart energy, smart car, smart healthcare, smart home, and so on. Academia and industries try to provide the users with convenient services upon seamless technological research and developments. Also, whenever and wherever a variety of services can be used without any limitation on the place and time upon connecting with different types of devices. However, security weaknesses due to integrations of multiple technological elements have been detected resulting in the leakage of user information, account hacking, and privacy leakage, threats to people's lives by device operation have been raised. In this paper, safer communication framework is suggested by device control and user authentication in the mobile network environment. After implementations of registration and authentication processes by users and devices, safe communication protocol is designed based on this. Also, renewal process is designed according to the safe control of the device. In the performance evaluation, safety was analyzed on the attack of protocol change weakness occurred in the existing system, service halt, data leakage, illegal operation control of message, and so on, which confirmed the enhanced speed approximately by 8% and 23% in the communication and verification parts, respectively, compared to the existing system.

• 기술혁신연구
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• 제25권3호
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• pp.1-24
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• 2017

최근 기술융합의 핵심현상으로 사물인터넷이 대두되면서 사물인터넷의 기술트렌드 및 기술융합에 관해 많은 연구들이 진행되고 있다. 그러나 기존 연구들의 대부분이 사물인터넷 기술 동향에 대한 정성적 연구에 그치고 있어 기술융합의 구체적 양상을 파악하기 어려운 실정이다. 따라서 본 연구에서는 특허 데이터를 기술의 대용데이터로 간주하고, 동시 분류분석과 텍스트마이닝을 바탕으로 사물인터넷 융합 네트워크를 구축하고 융합의 특성을 분석하였다. 본 연구에서는 먼저 문헌연구를 통해 사물인터넷의 융합을 일으키는 주요 기술군을 디바이스, 네트워크, 플랫폼, 서비스 네 가지로 정의한 후, "Internet of Things" 키워드를 중심으로 미국 특허청에서 수집된 923개 특허의 클래스를 네 가지 기술군에 할당하여 이들 간 관계를 파악하였다. 대부분의 클래스 및 키워드가 디바이스에 관련되어 있으므로, 본 연구에서는 융합 현상을 디바이스 융합과 전체 융합으로 나누어 기술융합 양상을 파악하였다. 디바이스 중심의 사물인터넷 기술을 분석한 결과 센서 디바이스를 비롯한 헬스케어 디바이스, 냉장 및 냉동 장치, 에너지관리 디바이스, 로봇, 임베디드 등이 주요 융합 그룹으로 도출되었다. 전체 기술을 대상으로 분석한 결과 사물인터넷 요소기술을 중심으로 스마트 헬스케어, 스마트 홈, 무인자동차 등 사물인터넷의 다양한 응용영역들이 기술융합을 이루고 있는 것으로 파악되었다. 본 연구 결과는 사물인터넷 기술융합 활성화를 위한 정책 및 전략 수립에 효과적으로 활용될 수 있을 것으로 기대된다.

• International Neurourology Journal
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• 제22권4호
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• pp.228-236
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• 2018

Neuromodulation was introduced for patients with poor outcomes from the existing traditional treatment approaches. It is well-established as an alternative, novel treatment option for voiding dysfunction. The current system of neuromodulation uses an open-loop system that only delivers continuous stimulation without considering the patient's state changes. Though the conventional open-loop system has shown positive clinical results, it can cause problems such as decreased efficacy over time due to neural habituation, higher risk of tissue damage, and lower battery life. Therefore, there is a need for a closed-loop system to overcome the disadvantages of existing systems. The closed-loop neuromodulation includes a system to monitor and stimulate micturition reflex pathways from the lower urinary tract, as well as the central nervous system. In this paper, we reviewed the current technological status to measure biomarker for closed-loop neuromodulation systems for voiding dysfunction.

• 대한안전경영과학회지
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• 제15권3호
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• pp.163-170
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• 2013

There are many pros and cons for whether smart glasses and watch would be further going technology or not beyond smart phone. What have to do domestically is to find acting ways to catch up with technological gap in short term basis through analyses and investigations in technological issues, patents profile, market forecast. In this paper, firstly we investigate and review technological issues and form factors of smart glasses and HMD, and secondly analyze technological tendency and identify their core technology and intension from global key player's patents analyses connected with smart glasses, and conclusively suggest technological prospects and it's countermeasures.

• 기술경영경제학회:학술대회논문집
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• 기술경영경제학회 1997년도 제11회 하계학술발표회 논문집
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• pp.195-221
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• 1997

This study examines the changing patterns of technological cooperation activities along technological development stages. Based on the longitudinal sample of 58 small and medium-sized companies in telecommunication equipment and device sectors, proposed hypotheses are tested using paired comparison t-test, ANOVA and multiple regression analysis. Major findings of this study are as follows. Along technological development stages, (1) patterns of technological cooperation activities differ in terms of the extent and diversity of use, partners, method, and motivation and (2) the impact of specific forms of technological cooperation activities on the firm's technological innovation varies. In addition, some managerial and policy implications are presented and future research directions are suggested.

• International Journal of Computer Science & Network Security
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• 제24권6호
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• pp.67-76
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• 2024

The Internet of Things (IoT) has revolutionized communication and device operation, but it has also brought significant security challenges. IoT networks are structured into four levels: devices, networks, applications, and services, each with specific security considerations. Personal Area Networks (PANs), Local Area Networks (LANs), and Wide Area Networks (WANs) are the three types of IoT networks, each with unique security requirements. Communication protocols such as Wi-Fi and Bluetooth, commonly used in IoT networks, are susceptible to vulnerabilities and require additional security measures. Apart from physical security, authentication, encryption, software vulnerabilities, DoS attacks, data privacy, and supply chain security pose significant challenges. Ensuring the security of IoT devices and the data they exchange is crucial. This paper utilizes the Random Forest Algorithm from machine learning to detect anomalous data in IoT devices. The dataset consists of environmental data (temperature and humidity) collected from IoT sensors in Oman. The Random Forest Algorithm is implemented and trained using Python, and the accuracy and results of the model are discussed, demonstrating the effectiveness of Random Forest for detecting IoT device data anomalies.

• 대한한방내과학회지
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• 제36권2호
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• pp.85-92
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• 2015

Objectives: The liver fibroscan has been developed as a noninvasive and convenient method to assess hepatic fibrosis. This study aimed to review this device in terms of its technological concept and clinical application in traditional Korean medicine (TKM). Methods: The technological background, diagnostic evaluation, and clinical usefulness of fibroscan were reviewed using various literature and clinical studies. One clinical example-a patient with hepatofibrosis who had been treated with TKM-is presented. Results: The liver fibroscan was approved as a medical device for noninvasive measurement of the hepatic fibrosis level by the Korean Food and Drug Administration (KFDA). Numerous clinical studies have confirmed that its sensitivity and specificity allow it to serve as a substitute for liver biopsy, the present gold standard diagnostic method. The accuracy and reproducibility and lack of technical risks are strong points of the fibroscan; however, it has some limitations for application, especially in patients with obesity or severe hepatitis. One clinical example showed the applicability of the liver fibroscan in herbal medicine-based treatments. Conclusions: The requirement for diagnostic medical devices is an important issue in TKM; therefore, this study provides valuable information for practitioners of TKM.

• Current Optics and Photonics
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• 제4권6호
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• pp.566-570
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• 2020

The present paper computes the refractive indices of different corona viruses (H5N1, H5N2, H9N2, H4N6, FAdV and IBV) through reflectance analysis of a virus solution. The computational analysis indicates that the refractive indices of all viruses are negative at the signal of 412 nm. Further the numerical output shows that the infectious bronchitis viruses (family of novel corona viruses, COVID-19) have higher negative refractive indices as compared to other corona viruses. Finally refractive indices of the family of COVID-19 are investigated with respect to the EID (Electronic infusion Device) concentration of the viruses, showing that the refractive index which ranges from "-0.96725 to -0.999998" corresponds to '0.01 to 10000' EID virus concentration.

• Clinical and Experimental Pediatrics
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• 제49권9호
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• pp.930-936
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• 2006

Although antiarrhythmic medication has been the main treatment modality for arrhythmia in children, in recent decades technological development and computerization have made great advances in nonpharmacological therapy. This article reviews the transcatheter radiofrequency ablation for tachycardia in children, recent advances of device therapy for bradycardia, antitachycardia pacing, implantable cardioverter defibrillator. As a new field of device therapy, cardiac resynchronization therapy for congestive heart failure is also mentioned.

• Journal of Information Display
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• 제3권4호
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• pp.4-7
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• 2002

A recently developed phase separated composite film method has been employed to fabricate a liquid crystal (LC) based electro-optical device using a single glass substrate. The resulting device is made of adjacent parallel layers of LC and polymer maded by phase separation. The LC layer is confined between the solidified polymer layer on one side and the glass substrate on the other. The electro-optical properties of these devices demonstrate their technological potential in light weight and hand-held electronic products.