• 한국문헌정보학회지
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• 제55권2호
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• pp.263-287
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• 2021

한국사회의 불평등과 관련된 연구는 다양한 영역에서 산발적으로 진행되어 왔다. 이 연구에서는 불평등 관련 연구 동향을 한국학술지인용색인을 통해 수집한 논문 데이터를 활용하여 기초 통계 분석, 단어 동시 출현 분석, 주 경로 분석을 통해 통합적으로 분석하였다. 기초 통계 분석을 통해 핵심저자, 저널, 논문을 파악할 수 있었다. 동시출현 분석을 통해 소득불평등, 교육불평등, 복지불평등, 불평등 정책이 핵심 주제로 확인되었다. 주 경로 분석을 통해 2004년 이후의 불평등 연구 흐름은 두 가지로 나타났다. 하나는 경제적 불평등에 관한 연구이고, 다른 하나는 건강 불평등 및 사회 구조적 불평등과 관련된 연구로 나타났다.

• 전기전자학회논문지
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• 제27권4호
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• pp.399-404
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• 2023

본 논문에서는 3D NAND Flash memory의 O/N/O(Oxide/Nitride/Oxide) 구조와 blocking oxide를 ferroelectric material로 대체한 O/N/F(Oxide/Nitride/Ferroelectric) 구조의 current path를 분석했다. O/N/O 구조는 V_read가 인가되면 neighboring cell의 E-field로 인해 current path가 channel 후면에 형성된다. 반면 O/N/F 구조는 ferroelectric material의 polarization으로 인해 electron이 channel 전면으로 이동하여 current path가 전면에 형성된다. 또한 channel thickness와 channel length에 따른 소자 특성을 분석했다. 분석 결과 O/N/F 구조의 전면 electron current density 증가는 O/N/O 구조보다 2.8배 더 높았고 O/N/F 구조의 전면 electron current density 비율이 17.7% 높았다. 따라서 O/N/O 구조보다 O/N/F 구조에서 전면 current path가 더 효과적으로 형성된다.

• 대한기계학회논문집A
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• 제24권1호
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• pp.62-68
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• 2000

Optimization technique to find a path of an inner reinforcement of an automobile hood is proposed by using design sensitivity informations. The strength and modal characteristics of the automobile hood are analyzed and their design sensitivity analyses with respect to the thickness are carried out using MSC/NASTRAN. Based on the design sensitivity analysis, determination of design variables and response functions is discussed. Techniques improving design from design sensitivity informations are suggested and the double-layer method is newly proposed to optimize the path of stiffener for a shell structure, Using the suggested method, we redesign a new inner reinforcement of an automobile hood and compare the responses with the original design. It is confirmed that new design improved in the frequency responses without the weight increasement.

• Journal of Electrical Engineering and Technology
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• 제7권5호
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• pp.705-713
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• 2012

In this paper, a novel 12/14 hybrid pole type bearingless switched reluctance motor (BLSRM) with short flux path and no flux-reversal in the stator is proposed. The proposed BLSRM has separated rotating torque and suspending force poles. Because of independent characteristics between torque and suspending force poles, the torque control can be decoupled from the suspending force control. Due to the short flux path without any reversal flux, compared to the 8/10 hybrid stator pole BLSRM, the output torque is significantly improved and the air-gap is easier to control. Meanwhile, basic design principle for the proposed structure is described. To verify the proposed structure, finite element method (FEM) is employed to get characteristics of the proposed structure and 8/10 hybrid stator pole BLSRM. Based on the analysis, a prototype of the proposed BLSRM is designed and manufactured. Finally, validity of the proposed structure is verified by the experimental results.

• ETRI Journal
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• 제39권2호
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• pp.213-221
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• 2017

The advent of wireless access in vehicular environments (WAVE) technology has improved the intelligence of transportation systems and enabled generic traffic problems to be solved automatically. Based on the IEEE 802.11p standard for vehicle-to-anything (V2X) communications, WAVE provides wireless links with latencies less than 100 ms to vehicles operating at speeds up to 200 km/h. To date, most research has been based on field test results. In contrast, this paper presents a numerical analysis of the V2X broadcast throughput limit using a path loss model. First, the maximum throughput and minimum delay limit were obtained from the MAC frame format of IEEE 802.11p. Second, the packet error probability was derived for additive white Gaussian noise and fading channel conditions. Finally, the maximum throughput limit of the system was derived from the packet error rate using a two-ray path loss model for a typical highway topology. The throughput was analyzed for each data rate, which allowed the performance at the different data rates to be compared. The analysis method can be easily applied to different topologies by substituting an appropriate target path loss model.

• 디지털산업정보학회논문지
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• 제9권2호
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• pp.41-54
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• 2013

In this paper, We collected location based services of the user's past moving paths through the GPS. Using the collected by location-based services through the analysis of the similarity between the user's of service level agreement recommended of mobile contact area(SLA) proposed that can be. S-RCA method based on Service Level Agreement of the users in order to provide the service user's path distance, time, and to predict the direction of the movement paths and collect. The data collected by the interests and requirements of users through classification with the same interests and the needs of users to move between the analysis of the similarity between the path is used to analyze the results of analysis of the path-specific tolerance range (distance, time, and space) is determined according to the difference in the contact area. From a small area of the error range for users first to recommended and through their smartphones recommended contact area (S-RCA) to meet with the other party to make a choice of recommended methods. We verify through experiments that proposed method(S-RCA) a valid and reliable mobile contact area were recommended.

• 한국유체기계학회 논문집
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• 제18권6호
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• pp.37-44
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• 2015

Conjugate heat analysis on a high pressure turbine stage including secondary flow paths has been carried out. The secondary flow paths were designed to be located in front of the nozzle and between the nozzle and rotor domains. Thermal boundary conditions such as empirical based temperature or heat transfer coefficient were specified at nozzle and rotor solid domains. To create heat transfer interface between the nozzle solid domain and the rotor fluid domain, frozen rotor with automatic pitch control was used assuming that there is little temperature variation along the circumferential direction at the nozzle solid and rotor fluid domain interface. The simulation results showed that secondary flow injected from the secondary flow path not only prevents main flow from penetrating into the secondary flow path, but also effectively cools down the nozzle and rotor surfaces. Also thermal barrier coating with different thickness was numerically implemented on the nozzle surface. The thermal barrier coating further reduces temperature gradient over the entire nozzle surface as well as the overall temperature level.

• 대한가정학회지
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• 제48권7호
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• pp.99-110
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• 2010

The purpose of this study was to analyze the path of parental divorce on their children's emotional and behavioral problems through child-rearing behaviors and children's self-esteem. The participants were 162 children from divorced families and 194 from intact families. The Instruments used were CBQ (Children's Behaviour Questionnaire) (Rutter, 1967), Child-rearing rating scale (Park, 1995) and SEI (Self Esteem Inventory) (Coopersmith, 1967). The data were analyzed by ANCOVA and path analysis. The results were as follows. First, there were significant differences in children's emotional and behavioral problems and self-esteem, and caregivers' child-rearing behaviors between children from divorced and intact families. Second, parental divorce affected children's emotional and behavioral problems directly, as well as indirectly through child-rearing behaviors and children's self-esteem.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2013년도 추계학술대회 논문집
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• pp.94-98
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• 2013

Transfer Path Analysis (TPA) is commonly used, by car makers and parts suppliers, analysis process to root the cause of NVH problems. In general, TPA is an analyzing technique to find the contributing factors of noise/vibration problems, and their transfer path in vehicle. However, not only TPA is used to analyze the source of NVH problems but also is used to predict NVH performance prior to the proto vehicle, or to set the development target for next new vehicle. Automotive parts manufacturing companies have to set NVH performance target when developing new systems just as car makers have NVH target set for new vehicle. Nevertheless, most of components are currently being developed based on subjective evaluation without an objective target. To judge the suitability of using TPA to set NVH target of electric parking brake, this research analyzed the transfer path by setting them in two points of view; Chassis Module and Electric Parking Brake, and comparing the measured value and calculated value. From this result, NVH target of electric parking brake will be approached in level of vehicle, system and component.

• 보건의료산업학회지
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• 제14권2호
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• pp.79-91
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• 2020

Objectives: The purpose of this study was to identify a regional difference among drinking behaviors, sober motivation, and drinking problems. Methods: The subjects included 600 citizens living in two regions, Busan. Descriptive analysis, t-test, correlation, and path analysis were used to confirm the regional difference. Results: The path of drinking method on sober motivation was statistically significant in both regions and drinking attitude was found to be a common factor that weakens an individual's sober motivation. Besides, the path of social networking on sober motivation had a difference in statistical significance between the two regions. Finally, the influence of social networks of District N (comparison region) on sober motivation was statistically significant and stronger than that of District D. Conclusions: A social environment-centered intervention to address drinking problems is essential in District N because of its people's tendency to drink together. On the other hand, an individual-focused intervention is preferred in District D where sober motivation is mainly affected by drinking method and attitude.