• 한국전자통신학회논문지
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• 제18권2호
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• pp.277-284
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• 2023

소규모 기업이 산재한 산업단지는 에너지 관리시스템을 구현하기가 쉽지 않아 에너지관련 데이터를 수집하여 조정하는 방법을 주로 사용한다. FEMS는 수동적 에너지 관리 방식에서 IoT와 ICT를 활용하는 능동적 에너지 관리 방식으로의 패러다임 변화 요구에 대응하는 시스템이다. 본 연구에서는 화학산업단지에 소재하고 있는 중소기업을 대상으로 공장에너지 관리시스템을 설계한다. 각 기업에 구축된 설비의 전력에너지를 대상으로 FEMS를 통하여 에너지를 절감하는 방안과 효율을 검토하여 효율성을 확인하였다. FEMS의 비용 효과성은 수용 기업의 업무 프로세스 내에서 책임과 권한이 부여된 인력에 의해 활용될 때 창출된다. 따라서 기업의 조직과 에너지 경영 목표 달성을 위한 에너지 경영 시스템의 기획, 지원, 운영 및 평가, 그리고 지속적 개선에 적용할 수 있는 EMS를 활용하는 것이 필요하다.

• 대한한의학회지
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• 제43권3호
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• pp.94-105
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• 2022

Objectives: This study investigated public opinion on the use of modern diagnostic medical devices by Korean Medicine doctors. Methods: A questionnaire looking into perceptions on the use of modern medical devices was developed. It was distributed by a third party and data was collected. Results were analyzed through frequency analysis, chi-square analysis (χ²-test), frequency and cross analysis using R program. The measurement variable in the study was the respondent's perspectives and expectations on the use of modern diagnostic medical devices by Korean Medicine doctors. The maximum significance level was 0.05. Results: There were a total of 3,000 responses and 80.8% of the respondents replied that there is a need for government-level discussion on endowing rights to Korean Medicine doctors as supervisors for safety management of radiation generating devices. Also, 83.3% of the respondents agreed the use of ultrasound imaging equipment in Korean Medicine clinics should be legalized. Conclusions: According to this study, respondents strongly support the use of modern diagnostic medical devices by Korean Medicine doctors. This is the first study to investigate public opinion in this area and it provides a significant insight into the public needs and desires for a wider scope of practice for Korean Medicine in the healthcare system.

• 예술인문사회 융합 멀티미디어 논문지
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• 제7권1호
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• pp.287-295
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• 2017

최근 들어, 사물 인터넷 (Internet of Things)을 지원하기 위한 중요한 기술 중 하나로 고려되고 있는 MTC (Machine Type Communication)는 사람의 개입 없이 MTC 단말들에게 네트워크 연결을 제공하는 기술이다. 그러나 짧은 시간 내에 많은 MTC 단말들이 접속을 시도하는 경우, 제한된 통신 자원으로 인하여 자원 경쟁이 심화되고, 이로 인하여 단말의 접속 실패가 야기될 수 있다. 이러한 문제를 해결하기 위해서는 단말들의 통신 자원 접근을 분산시킬 필요가 있다. 본 논문에서는 LTE-A 환경에서 MTC 단말들의 효율적인 접근관리 기법을 제안한다. 먼저 특정 시간구간 동안 접속을 시도하는 단말 개수를 측정하고, 이를 기반으로 다음 시간구간 동안 접속을 시도할 단말 개수를 예측한다. 이러한 예측 개수를 기반으로 제안 기법은 통신자원 접근을 시도하는 단말 개수를 제어한다. 제안된 기법의 성능 증명을 위하여, 성공확률, 실패확률, 충동확률, 그리고 접속지연시간 측면에서 성능을 분석하였다.

• Physical Therapy Rehabilitation Science
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• 제12권2호
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• pp.105-114
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• 2023

Objective: The study examined the validity and reliability of tele-assessment of cervical range of motion (ROM) through video conferencing. Design: A cross-sectional study Methods: The study included 22 healthy adults as subjects and 10 physical therapists as evaluators. The subjects underwent both face-to-face and tele-assessment of cervical ROM. The CROM (Cervical Range of Motion) device was used for reference measurements in the face-to-face assessment. The evaluators assessed the subjects' ROM through visual inspection (VI) and using a Universal Goniometer (UG) in the tele-assessment. Results: The results showed a significant correlation between the face-to-face and tele-assessment measurements for all ROM contents. The correlation coefficients ranged from r=0.54 to 0.71 (p<0.05), indicating concurrent validity. In terms of inter-rater reliability, the ICC values for both VI and UG assessments in the tele-assessment were high, with ICCs of 0.93 and 0.92, respectively. Additionally, the study investigated the usability of the tele-assessment method and environment. The satisfaction of the participants and evaluators was assessed using the Telehealth Usability Questionnaire (TUQ), which evaluates perceptions, usability, and satisfaction with telehealth services. Conclusions: In conclusion, tele-assessment of cervical range of motion using video conferencing was valid and reliable. Also, investigated participant and evaluator satisfaction and opinions, providing insights into the clinical value of tele-assessment. It is important to note that the study was conducted only healthy adults, and further research may be needed to validate the tele-assessment method in populations with cervical dysfunction or neck pain. These findings support the potential effectiveness of telerehabilitation services in assessing and managing musculoskeletal disorders.

• Asia Marketing Journal
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• 제14권3호
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• pp.119-135
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• 2012

The purpose of this research is to investigate the effects of the product display type on the consumers' purchase intention, attitude toward store, and revisit intention in the various mobile shopping situations. To test the hypothesis, between-subjects experiment with 3 mobile shopping situations (outdoor place, public transportation, commercial facilities) by 3 product display types (search, category, product) was conducted, and analyzed with ANCOVA (analysis of covariance). The result of the experiment shows there are no main effects of the mobile shopping situations and the product display types, but the interaction effects of the product display type and the mobile shopping situation on the purchase intention and the revisit intention are statistically significant. However the attitude toward the store is not affected by the treatments. Experiment results suggest that the positive consumer responses in terms of the purchase and revisit intention can be achieved when the product display is matched with the situation in the mobile shopping setting. Controlling consumers' evaluation on the product information and their experience of online shopping, we can take these effect as the results of match-up between the product display type and the situational factors surrounding mobile shopping. The result provides strong support for the location-based service in mobile shopping. Most of the mobile device can utilize the consumers' location which can be easily interpreted as the situational factors. With regard of the level of the external stimulation, the shopping service providers can offer the main interface with the right match with the consumers' situations. When the external stimulation level is high, they should provide the category display or product display in the target promotion in their mobile shopping apps. However if the target is on the way with the low external stimulation level, they should provide the search format as the main interface in their apps. More interestingly, this kind of manipulation does not affect the consumers' attitude toward the store according to our research result. Future research direction is discussed.

• 마이크로전자및패키징학회지
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• 제30권3호
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• pp.88-93
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• 2023

고대역폭 메모리(HBM)에 대한 수요가 증가하고 직경이 더 큰 웨이퍼의 핸들링 기술이 발전함에 따라 본딩 웨이퍼의 두께 균일성에 대해 신뢰성을 확보할 수 있는 측정 방법이 요구되고 있다. 본 연구에서는 300mm 웨이퍼를 대상으로 웨이퍼의 전 영역에 대해 TTV를 측정할 수 있는 모듈을 설계 제직하고, 측정 모듈의 설계를 바탕으로 발생할 수 있는 측정 오차를 분석하였으며, 웨이퍼의 처짐과 척의 기구적 오차를 고려한 모델 해석을 통해 예측된 기울기 값에 따른 측정 오차를 추정하였다. TTV 측정 모듈은 웨이퍼 지지를 위한 센터 척과 리프트 핀을 활용하여 웨이퍼의 전체 영역에 대해 측정이 가능하도록 하였다. 모달 해석을 통해 모듈의 구조적 안정성을 예측하였으며, 구동부와 측정부 모두 100Hz 이상의 강성을 갖는 것을 확인하였다. 설계된 모듈의 측정 오차를 예측한 결과 두께 1,500um의 본딩 웨이퍼를 측정할 경우 예측된 측정 오차는 1.34nm로 나타났다.

• 한국염색가공학회지
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• 제35권4호
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• pp.256-273
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• 2023

Among the dyeing industries, the tenter process is a process that improves the quality of fibers by drying and ironing (heat treatment) dyed fabrics, and drugs such as water repellents, antistatic agents, and fiber softeners are mainly used in these tenter processes. These drugs are vaporized in the process of treatment by high temperatures (180 ~ 230℃), and are observed in a complex form such as white smoke, oil mist, and fine dust, causing odor. To treat the complex exhaust gas at the rear end of the tenter facility, most companies operate by installing a wet scrubber and an adsorption tower alone or in parallel, but there are many problems. In particular, the insoluble oil mist at the rear end of the tenter has significantly low processing efficiency in the cleaning dust collection facility, and there is a problem in the facility by adsorption due to the occlusion phenomenon caused by the oil mist. In addition, the odor gas at the rear end of the tenter contains a lot of aldehydes, and in order to improve these various problems, a complex exhaust purification device using cyclone and electric support collector was developed. This study examined the applicability of economical and efficient technology by removing complex air pollution at the rear end of the tenter and applying improved technology than the existing technology.

• 대한의용생체공학회:의공학회지
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• 제44권6호
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• pp.414-427
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• 2023

Implantable bioabsorbable combination products undergo inherent degradation and systemic absorption within the physiological environment, thereby streamlining the therapeutic regimen and obviating the imperative for invasive extraction procedures. This inherent property not only enhances patient convenience and therapeutic efficacy but also underpins a paradigm of support characterized by heightened safety parameters. Within the regulatory landscapes of Korea, the United States, and Europe, implantable bioabsorbable combination products are meticulously classified into distinct categories, either as pharmaceutical implants or as implantable medical devices, depending on their primary mode of action. This scholarly investigation systematically examines the regulatory frameworks governing implantable bioabsorbable combination products in South Korea, the United States, and Europe. Notable discrepancies across national jurisdictions emerge concerning regulatory specifics, including terminology, product classification, and product name associated with these products. The conspicuous absence of standardized approval regulations presents a formidable barrier to the commercialization of these advanced medical devices. This academic discourse passionately emphasizes the critical need for formulating and implementing a sophisticated regulatory framework capable of streamlining the product approval process, thereby paving the way for a seamless path to commercializing implantable bioabsorbable combination products.

• 한국표면공학회지
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• 제56권5호
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• pp.299-308
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• 2023

In this study, phosphorus (P)-doped nickel cobaltite (P-NiCo₂O₄) and nickel-cobalt layered double hydroxide (P-NiCo-LDH) were synthesized on nickel (Ni) foam as a conductive support using hydrothermal synthesis. The thermal properties, crystal structure, microscopic surface morphology, chemical distribution, electronic state of the constituent elements on the sample surface, and electrical properties of the synthesized P-NiCo₂O₄ and P-NiCo-LDH samples were analyzed using thermogravimetric analysis-differential scanning calorimetry (TGA-DSC), X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The P-NiCo₂O₄ electrode exhibited a specific capacitance of 1,129 Fg^-1 at a current density of 1 Ag^-1, while the P-NiCo-LDH electrode displayed a specific capacitance of 1,012 Fg^-1 at a current density of 1 Ag-1. When assessing capacity changes for 3,000 cycles, the P-NiCo₂O₄ electrode exhibited a capacity retention rate of 54%, whereas the P-NiCo-LDH electrode showed a capacity retention rate of 57%.

• 한국전자통신학회논문지
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• 제18권6호
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• pp.1353-1362
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• 2023

혈당 수치를 확인하기 위해 사용하는 채혈식 혈당 측정기의 불편함을 해소하기 위한 다양한 방법이 시도되고 있다. 본 논문에서는 근적외선 센서를 이용하여 획득한 스펙트럼 데이터로부터 머신러닝 기술을 사용하여 비침습적으로 혈당 수치를 추정하고자 하였다. 연구에 사용한 비침습식 혈당측정기는 가시광선을 포함하여 총 6개로 구성된 근적외선 발광부와 이를 수신하는 수광부를 가지는데, 손가락과 같은 인체의 특정 부위에 대한 스펙트럼 데이터를 수집하기 위해 만든 기기이다. 혈당 수치에 따라 유의미한 차이가 있는지를 검증하기 위해 머신 러닝 알고리즘들을 통해 혈당 수치 추정을 시도하였다. 수집한 데이터에 5가지 머신 러닝 알고리즘 기법을 적용하면서 다양한 하이퍼 파라미터를 조정한 결과, 서포트 벡터 회귀 알고리즘이 가장 좋은 성능을 나타냄을 확인하였다.