• 한국콘텐츠학회논문지
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• 제19권5호
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• pp.35-47
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• 2019

본 연구는 전문여자대학 신입생의 학업스트레스가 대학생활적응에 미치는 영향을 확인하고 그 과정에서 감사성향과 학업적자기효능감의 영향력을 검증하였다. 이를 위하여 선행연구를 고찰하여 연구모형을 수립하고 상관관계분석과 구조방정식 분석을 통하여 변인들 간의 관계를 확인하였다. 인천지역의 전문여대 신입생들 1785명을 대상으로 학업스트레스, 학업적자기효능감, 감사성향, 대학생활적응 척도로 구성된 설문을 실시하였다. 연구 결과, 학업스트레스는 대학생활적응, 감사성향, 학업적자기효능감과 모두 부적 상관을 보였다. 또한 연구 모형을 검증한 결과 감사성향과 학업적자기효능감이 학업스트레스와 대학생활적응을 순차적으로 부분 매개하는 이중매개효과가 유의한 것으로 나타났다. 이러한 결과를 토대로 대학생의 적응 및 학업 지도에 대한 시사점과 본 연구의 제한점 및 후속 연구를 위한 제언을 논의하였다.

• 국제물리치료학회지
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• 제10권2호
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• pp.1803-1809
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• 2019

Background: Cervical mobilization has been applied mainly for the improvement of arm and neck movements and pain reduction, and little research has been done to improve the executive function. Since this kind of so-called mechanical neck pain is one of most common symptoms, there are controversial issues about this with spine alignment. Posteroanterior (PA) mobilization from the Maitland concept is a process of examination, assessment, and treatment of neuromusculoskeletal disorder by manipulative physical therapy. Objective: To examine the short-term benefits of mobilization for patients with non-specific neck pain. Design: Dual-group Pretest-Posttest Design from the Quasi-Experimental research Methods: Fourteen participants (male 8, female 6; 20's of their age) with non-specific neck pains which are distributed all the unilateral or bilateral body side were recruited. Participants were categorized to Neck Pain with Movement Coordination Impairments (NPMCI) and Neck Pain with Mobility Deficits (NPMD) groups according to the results of physical examination. Professional physical therapist who has over 15-years-of clinical experience applicated manipulative therapy for the neck pain, an occupational therapist only conducted evaluations; K-NDI (Korean version of the Neck Disability Index), VAS (Visual Analog Scale), BDS-K (Korean version of Behavioral Dyscontrol Scale) for decreasing possible adverse effects; there were no person who reported other symptoms followed 4 weeks from the trial. Results: In the NPMCI group, data analysis indicated statistical differences between the PA mobilization interventions in NDI and BDS-K; even though, pain was reduced in VAS, this is not a significantly differ. In the NPMD group, data analysis represented statistical differences between the PA mobilization interventions in NDI, VAS and BDS-K; the scores were represented to be increased or the pain got relief. Conclusions: PA mobilization techniques according to Maitland concept have beneficial effects in patients with neck pain and other clinical positive effects which included neck disability, pain itself and motor function of upper extremity.

• 한국콘텐츠학회논문지
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• 제21권1호
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• pp.662-673
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• 2021

본 연구는 다문화 청소년의 문화적응 스트레스가 정신건강에 미치는 영향에서 사회적 지지의 매개 효과 규명을 목적으로 한다. 연구방법은 다문화 청소년 패널 제4차(중1)~제6차(중3)의 1,573명을 AMOS 22.0으로 분석한 결과는 다음과 같다. 첫째, 다문화 청소년의 문화적응 스트레스는 정신건강에 정적인 영향을 미치는 것으로 나타났다. 둘째, 다문화 청소년의 문화적응 스트레스는 사회적 지지에 부적인 영향을 미치는 것으로 나타났다. 셋째, 다문화 청소년의 사회적 지지는 정신건강에 부적인 영향을 미치는 것으로 나타났다. 넷째 다문화 청소년의 사회적 지지는 문화적응 스트레스가 정신건강에 미치는 영향에서 매개영향을 미치는 것으로 나타났다. 이는 다문화 청소년이 이중문화에 적응하는 과정에서 겪는 스트레스로 인하여 사회적 지지에 부적인 영향을 미치고, 이런 사회적 지지는 다문화 청소년의 정신건강에 정적인 영향을 미치는 것을 밝혔다.

• 전력전자학회논문지
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• 제26권3호
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• pp.192-198
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• 2021

The battery's State of Health (SOH) is a critical parameter in the process of battery use, as it represents the Remaining Useful Life (RUL) of the battery. Electrochemical Impedance Spectroscopy (EIS) is a widely used technique in observing the state of the battery. The measured impedance at certain frequencies can be used to evaluate the state of the battery, as it is intimately tied to the underlying chemical reactions. In this work, a low-cost portable EIS instrument is developed on the basis of the ARM Cortex-M4 Microcontroller Unit (MCU) for measuring the impedance spectrum of Li-ion battery packs. The MCU uses a built-in DAC module to generate the sinusoidal sweep perturbation signal. Moreover, it performs the dual-channel acquisition of voltage and current signals, calculates impedance using a Digital Lock-in Amplifier (DLA), and transmits the result to a PC. By using LabVIEW, an interface was developed with the real-time display of the EIS information. The developed instrument was suitable for measuring the impedance spectrum of the battery pack up to 1000 V. The measurement frequency range of the instrument was from 1 hz to 1 Khz. Then, to prove the performance of the developed system, the impedance of a Samsung SM3 battery pack and a Bexel pouch module were measured and compared with those obtained by the commercial instrument.

• 정보보호학회논문지
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• 제30권6호
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• pp.967-973
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• 2020

전략물자관리 제도의 이행 확산에 따라 전략물자 판정의 중요성이 높아지고 있으나 전략물자 제도를 처음 접하는 수출기업은 전략물자의 개념을 이해하기 쉽지 않고, 전략물자를 통제하는 기준이 다양하여 전략물자 판정에 어려움이 따른다. 본 논문에서는 전략물자 제도를 처음 접하는 기업이나 전략물자 판정시스템 이용자에게 진입장벽을 낮추어 판정이라는 과정을 쉽게 접근할 수 있는 방법을 제안한다. 이용자가 전략물자 판정이라는 절차를 매뉴얼이나 카탈로그의 제공만으로 판정결과를 확인할 수 있게 된다면, 전략물자 판정 방법과 절차에 보다 편리하고 쉽게 다가설 수 있을 것이다. 본 연구 목적을 달성하기 위해 이미지 인식 및 분류에서 연구되고 있는 딥러닝과 OCR(광학문자판독) 기술을 활용하고, 전략물자 판정 지원도구에 대한 개발과 연구를 통하여 우리 기업의 전략물자 판정에 도움이 되는 정보를 제공한다.

• 한국의류산업학회지
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• 제24권5호
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• pp.605-617
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• 2022

The purpose of this study was to investigate the influence of retailing types on consumers' omnichannel experience while purchasing fashion products. The omnichannel experience occurs when retailers provide seamless customer experience across the various touchpoints of retail channels. In this empirical study, retail types were categorized into single-brand stores and multi-brand stores, and the relationship among store loyalty, brand loyalty, and customer retention was observed by the research model. A survey was conducted on the global consumers who had experience in purchasing fashion products via the omnichannel using Amazon Mechanical Turk; as a result, 351 responses were analyzed. The mediating and moderating effects of loyalty constructs and retail types were analyzed using Process Macro 4.0. The results indicated that a seamless omnichannel experience affects customer retention by mediating store loyalty and brand loyalty; additionally, the dual mediating effect of store loyalty and brand loyalty was significant. The moderating effect according to retail type was identified, and the moderated mediation effect of store loyalty was validated. The results showed that multi-branded retailers' store loyalty had a stronger influence on customer retention than that of single-brand retailers and exhibited the relationship between store loyalty and brand loyalty as well as retail types (single vs multi) in a seamless omnichannel customer experience.

• Nuclear Engineering and Technology
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• 제53권8호
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• pp.2582-2590
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• 2021

The high-energy milling is one of the most extended techniques to produce Oxide dispersion strengthened (ODS) powder steels for nuclear applications. The consequences of the high energy mill process on the final powders can be measured by means of deformation level, size, morphology and alloying degree. In this work, an ODS ferritic steel, Fe-14Cr-5Al-3W-0.4Ti-0.25Y₂O₃-0.6Zr, was fabricated using two different mechanical alloying (MA) conditions (M_std and M_act) and subsequently consolidated by Spark Plasma Sintering (SPS). Milling conditions were set to evidence the effectivity of milling by changing the revolutions per minute (rpm) and dwell milling time. Differences on the particle size distribution as well as on the stored plastic deformation were observed, determining the consolidation ability of the material and the achieved microstructure. Since recrystallization depends on the plastic deformation degree, the composition of each particle and the promoted oxide dispersion, a dual grain size distribution was attained after SPS consolidation. M_act showed the highest areas of ultrafine regions when the material is consolidated at 1100 ℃. Microhardness and small punch tests were used to evaluate the material under room temperature and up to 500 ℃. The produced materials have attained remarkable mechanical properties under high temperature conditions.

• 한국초전도ㆍ저온공학회논문지
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• 제9권4호
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• pp.19-23
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• 2007

The superconducting properties of several HTS coated conductors (CC), which had different tape structures, fabricated by KERI, X and Y institutes were compared. We have fabricated the $high-J_c$ SmBCO CC, which has 273.5 A/cm, $1.2MA/cm^2$ and 93.5 K for $I_C,\;J_C\;and\;T_{c-zero}$, respectively, using the EDDC (Evaporation using Drum in Dual Chambers) process. Both X and Y institutes CCs, however, were purchased. The n-values of KERI, X and Y institutes CCs are 58.5, 40.7 and 31.5 in $V=1{\sim}10{\mu}V$ criterion, respectively. The in-field properties of $I_C$ at 77K were investigated and the $J_C(B)/J_C(0G)$ at 0.5 T with $B{\perp}$ ab-plane are 0.31, 0.19 and 0.24 for KERI, X and Y institutes CCs, respectively. From the $I_C-{\theta}-B$ measurement, we observed that the ab-plane of ReBCO phase was tilted for the ab-plane of substrate in the KERI and X institutes CCs. The tilted angle is about 5 degree. We confirmed that the peak shift (as an inclined texture) was observed by X-ray (102) pole figures of the SmBCO for the KERI CC.

• 한국초전도ㆍ저온공학회논문지
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• 제10권2호
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• pp.16-19
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• 2008

Angular dependence of critical current density of SmBCO coated conductor fabricated by co-evaporation method was investigated. For comparison, three samples were fabricated by a co-evaporation method and one sample was fabricated by a pulsed laser deposition process. The deposition system, named EDDC (Evaporation using Drum in Dual Chambers), is a batch type co-evaporation system, which is composed of reaction chamber and evaporation chamber. The normalized critical current density ratio ($I_c/I_c$(H//ab-plane)) of EDDC-SmBCO samples was found to be higher than that of PLD-YBCO sample in the whole range of angle. While the EDDC-SmBCO samples evidently had a peak at the angle of H//c-axis in the plot of the angular dependence of critical current, the normalized critical current of PLD-YBCO sample decreased monotonically without any peak as angle increased. The field dependence of critical current under the magnetic field parallel to the normal direction of those samples showed similar aspect in the range of $0\;G{\sim}5000\;G$.

• Journal of Information Processing Systems
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• 제19권2호
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• pp.139-148
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• 2023

Current food-traceability platforms suffer from problems such as inconsistent traceability standards, a lack of public credibility, and slow access to data. In this work, a combined code and identification method was designed that can achieve more secure product traceability using the dual anti-counterfeiting technology of a QR code and a hidden code. When the QR code is blurry, the hidden code can still be used to effectively identify food information. Based on this combined code, a food-safety traceability platform was developed. The platform follows unified encoding standards and provides standardized interfaces. Based on this innovation, the platform not only can serve individual food-traceability systems development, but also connect existing traceability systems. These will help to solve the problems such as non-standard traceability content, inconsistent processes, and incompatible system software. The experimental results show that the combined code has higher accuracy. The food-safety traceability platform based on the combined code improves the safety of the traceability process and the integrity of the traceability information. The innovation of this paper is invoking the combined code united the QR code's rapidity and the hidden code's reliability, developing a platform that uses a unified coding standard and provides a standardized interface to resolve the differences between multi-food-traceability systems. Among similar systems, it is the only one that has been connected to the national QR code identification platform. The project has made profits and has significant economic and social benefits.