• Title/Summary/Keyword: Kim's model

Search Result 15,609, Processing Time 0.072 seconds

Pilot study for the development of Korean and English speech processing task system (한국어-영어 말처리 평가시스템 개발을 위한 기초 연구)

  • Ji-Yeong Kim;Ji-Wan Ha
    • Phonetics and Speech Sciences
    • /
    • v.16 no.2
    • /
    • pp.29-36
    • /
    • 2024
  • A speech processing model based on a psycholinguistic approach can identify the specific speech processing deficits of children with speech sound disorders (SSDs) through various pathways. In most cases, the cause of the speech problem with SSD children is unknown, so it is important to identify the underlying strengths and weaknesses for individualized intervention. In addition, because the native language deficits can also affect foreign language production, it is necessary to examine speech processing abilities between the two languages. This study is a preliminary study to develop a Korean-English speech processing task system. Speech production task and speech processing task (DT, PRT, NRT) were conducted both in Korean and English on 10 children with SSD and 20 normal children (NSA). As a result, the SSD group showed significantly lower production ability than the NSA group in both languages. As a result of the speech processing task, there was no significant difference in the discrimination task (DT), while there was a significant difference between language types in the phonological representation task (PRT) and between language types and groups in the nonword repetition task (NRT). The results of this study confirmed that children's native language and foreign language processing skills may be different, and that the sub-tasks of speech processing system should be further subdivided.

Draft List and Relative Importance of Principal Processes in the Geosphere to be Considered for the Radiological Safety Assessment of the Domestic Geological Disposal Facility through Analyzing FEPs for KBS-3 Type Disposal Repository of High-level Radioactive Waste(HLW) (KBS-3 방식 고준위방폐물 심층처분장 FEP 분석을 통한 국내 사용후핵연료 심층처분시설 방사선학적 안전성 평가용 지권영역 주요 프로세스 항목 및 상대적 중요도 도출)

  • Sukhoon Kim;Donghyun Lee;Dong-Keuk Park
    • Journal of Radiation Industry
    • /
    • v.17 no.1
    • /
    • pp.33-44
    • /
    • 2023
  • The deep geological repository of high-level radioactive waste shall be designed to meet the safety objective set in the form of radiation dose or corresponding risk to protect human and the environment from radiation exposure. Engineering feasibility and conformity with the safety objective of the facility conceptual design can be demonstrated by comparing the assessment result using the computational model for scenario(s) describing the radionuclide release and transport from repository to biosphere system. In this study, as the preliminary study for developing the high-level radioactive waste disposal facility in Korea, we reviewed and analyzed the entire list of FEPs and how to handle each FEP from a general point of view, which are selected for the geosphere region in the radiological safety assessment performed for the license application of the KBS-3 type deep geological repository in Finland and Sweden. In Finland, five FEPs (i.e., stress redistribution, creep, stress redistribution, erosion and sedimentation in fractures, methane hydrate formation, and salt exclusion) were excluded or ignored in the radionuclide release and transport assessment. And, in Sweden, six FEPs (i.e., creep, surface weathering and erosion, erosion/sedimentation in fractures, methane hydrate formation, radiation effects (rock and grout), and earth current) were not considered for all time frames and earthquake out of a total of 25 FEPs for the geosphere. Based on these results, an FEP list (draft) for the geosphere was derived, and the relative importance of each item was evaluated for conducting the radiological safety assessment of the domestic deep geological disposal facility. Since most of information on the disposal facility in Korea has not been determined as of now, it is judged that all FEP items presented in Table 3 should be considered for the radiological safety assessment, and the relative importance derived from this study can be used in determining whether to apply each item in the future.

The MZ Generation's Fear of Startup Failure : Effects of Financial, Psychological, and Behavioral Factors (MZ세대의 창업실패두려움 : 재정적, 심리적, 행동적 요인의 영향)

  • Kim, Hyun-bae;Lee, Su-jin
    • Journal of Venture Innovation
    • /
    • v.7 no.3
    • /
    • pp.141-157
    • /
    • 2024
  • This study investigated the factors influencing the fear of failure in starting a business among the MZ generation(Millennials and Generation Z). The research focused on financial, psychological, and behavioral factors affecting this fear of failure and employed empirical analysis using structural equation model on data collected from 200 members of the MZ generation. Key findings included: Financial factor(lack of accessible finance) significantly increased the fear of startup failure. Psychological factors(aversion to risk and aversion to stress) also significantly contributed to the fear of failure. The influence of behavioral factor(aversion to hard work) on fear of failure was not statistically significant. Among these, aversion to stress had the strongest impact, followed by aversion to risk and lack of accessible finance. Fear of startup failure was found to have a significant negative effect on the intention to start a business among the MZ generation. Furthermore, fear of startup failure mediated the relationship between psychological factors(aversion to risk and aversion to stress) and behavioral factor(aversion to hard work) and entrepreneurial intention. However, the mediating effect between financial factor(lack of accessible finance) and entrepreneurial intention was not tested. These findings contributed academically by offering a more detailed analysis of factors affecting entrepreneurial intentions compared to previous studies. Practically, the results suggested ways to mitigate the fear of failure to enhance the entrepreneurial intentions of the MZ generation.

Examining Pedagogical Reasoning of Beginning Science Teachers in a Professional Learning Community (교사학습공동체 초임과학교사의 교수학적 추론 탐색)

  • Aeran Choi;Jiye Kim;Jaekyoung Song
    • Journal of the Korean Chemical Society
    • /
    • v.68 no.4
    • /
    • pp.205-220
    • /
    • 2024
  • This study aims to explore characteristics of pedagogical reasoning and action of beginning science teachers that naturally and spontaneously occurs in a professional learning community. Three novice middle school science teachers who majored chemistry education in A college of education, passed the examination for selecting secondary school chemistry teachers, and had a common goal of designing 8th grade science lesson plan voluntarily created a professional learning community and had weekly meetings over a year. Main data sources included transcribed audio-recording of 11 meetings of three science teachers in a professional learning community. Data was analyzed using Shulman's pedagogical reasoning model that includes comprehension, transformation, instruction, evaluation, reflection, and new comprehension to identify characteristics and features of pedagogical reasoning in a professional learning community. Data analysis revealed that pedagogical reasoning in a professional learning community comprises not only preparation, representations, instructional selections, and adaptation but also evaluation, reflection, and new comprehension in transformation stage. Reflection in transformation stage leads teachers to be actively engaged in discussion and get new comprehension on each sub-component(preparation, representations, instructional selections, adaptation, and evaluation) of transformation stage.

Effect of Pot Bearing Aging on the Seismic Response of a Three-span Continuous Girder Bridge (3경간 연속 거더교의 지진응답에 대한 포트받침 노후화의 영향)

  • Ju Hyeon Jo;Dong Ho Kim;Jun Won Kang;Hyejin Yoon
    • Journal of the Computational Structural Engineering Institute of Korea
    • /
    • v.37 no.4
    • /
    • pp.251-258
    • /
    • 2024
  • This study investigated the effect of bearing aging on the seismic response of a three-span continuous concrete girder bridge with pot bearings installed. The pot bearings were modeled as elastic springs in the longitudinal, transverse, and vertical directions of the bridge to reflect the stiffness of fixed and movable supports. The effect of bearing aging on the seismic response of the bridge was examined by considering two factors: a decrease in the horizontal stiffness of the fixed bearings and an increase in the horizontal stiffness of the movable bearings. The finite element model of the three-span continuous girder bridge was validated by comparing its numerical natural frequencies with the designed natural frequencies. Using artificial ground motions that conform to the design response spectrum specified by the KDS bridge seismic design code, the seismic responses of the bridge's girders and bearings were calculated, considering the bearing stiffness variation due to aging. The results of a numerical analysis revealed that a decrease in the horizontal stiffness of the fixed bearings led to an increase in the absolute maximum relative displacement of the bearings during an earthquake. This increases the risk of the mortar block that supports the bearing cracking and the anchor bolt breaking. However, an increase in the horizontal stiffness of the movable bearings due to aging decreased the absolute maximum shear on the fixed bearings. Despite the shear reduction in the fixed bearings, the aging of the pot bearings change could cause additional tensile bending stress in the girder section above the free bearings, which could lead to unexpected structural damage to the continuous bridge during an earthquake.

Relationship between Presenteeism, Service Performance, and Turnover Intention of Beauty Workers: Mediation Effect of Job Burnout (뷰티 종사자의 프리젠티즘이 직무성과와 이직의도와의 관계 : 직무소진의 매개효과)

  • Gyu-Rang Kim;Seung-Hyeon Mun;So-Eun Lee
    • Journal of the Korean Applied Science and Technology
    • /
    • v.41 no.3
    • /
    • pp.531-542
    • /
    • 2024
  • The purpose of this study was to analyze the mediating effect of beauty workers' presenteeism on job burnout in the relationship between job performance and job turnover. The participants in this study were 272 beauty workers in Seoul and Gyeonggi Province, and data were collected through a structured questionnaire. The collected data were analyzed through descriptive statistics, confirmatory factor analysis, correlation, structural equation model, and mediation effect analysis using bootstrapping method using SPSS and AMOS 26.0 statistical programs. The conclusions drawn through a series of research procedures are as follows. First, beauty workers' presenteeism was found to have a statistically significant positive (+) effect on job burnout. Second, beauty workers' presenteeism showed a statistically significant positive (+) effect on turnover intention, but no significant relationship was found with job performance. Third, job burnout among beauty workers was found to have a statistically significant effect on job performance and turnover intention. Fourth, as a result of analyzing the mediating effect of beauty workers' presenteeism on job burnout in the relationship between job performance and turnover intention, the effect of presenteeism on job performance through job burnout showed a complete mediating effect, and it was different from turnover intention. It showed a partial mediation effect.

Implementation of a real-time public transportation monitoring system (실시간 대중교통 모니터링 시스템 구현)

  • Eun-seo Oh;So-ryeong Gwon;Joung-min Oh;Bo Peng;Tae-kook Kim
    • Journal of Internet of Things and Convergence
    • /
    • v.10 no.4
    • /
    • pp.9-19
    • /
    • 2024
  • In this paper, a real-time public transportation monitoring system is proposed. The proposed system was implemented by developing a public transportation app and utilizing optical sensors, pressure sensors, and an object detection algorithm. Additionally, a bus model was created to verify the system's functionality. The proposed real-time public transportation monitoring system has three key features. First, the app can monitor congestion levels within public transportation by detecting seat occupancy and the total number of passengers based on changes in optical and pressure sensor readings. Second, to prevent errors in the optical sensor that can occur when multiple passengers board or disembark simultaneously, we explored the possibility of using the YOLO object detection algorithm to verify the number of passengers through CCTV footage. Third, convenience is enhanced by displaying occupied seats in different colors on a separate screen. The system also allows users to check their current location, available public transportation options, and remaining time until arrival. Therefore, the proposed system is expected to offer greater convenience to public transportation users.

Open-ended Coaxial Probe Technique for the Dielectric Characterization of Propylene Carbonate, Dimethyl Carbonate and Their Mixtures from 0.1 to 8 GHz at 288.15, 298.15, and 308.15 K (개방 단말 동축선을 활용한 프로필렌 카보네이트, 디메틸 카보네이트 및 이들의 이성분계 혼합물의 유전 이완 측정과 해석)

  • Hyo Jung Kim;Seung-Wan Song;Tae Jun Yoon
    • Clean Technology
    • /
    • v.30 no.3
    • /
    • pp.228-238
    • /
    • 2024
  • Electrolytes are one of the essential components of a lithium-ion battery. They determine the battery's lifespan and cell characteristics. The dielectric constant is a key thermophysical property for determining how much salt can be dissociated and solvated in a solution. Hence, fast and reliable dielectric constant measurement is essential when formulating an electrolyte solution. This work implemented an open-ended coaxial probe (OECP) station as a quick and reliable tool to measure the complex permittivity spectra of electrolyte solutions. The capability of the OECP station was tested by measuring the complex permittivity of propylene carbonate (PC), dimethyl carbonate (DMC), and their mixtures from 0.1 to 8 GHz at 288.15, 298.15, and 308.15 K. The obtained dielectric spectra were then interpreted based on dielectric relaxation models and thermodynamic theories. The measured static dielectric constant data agreed well with the data from previous studies. They were also correlated using the Wang-Anderko thermodynamic model, showing approximately a 1% deviation from the experimental data. In addition, the relaxation characteristics, including the relaxation time and the Cole-Davidson exponent, showed that the microstructure of the solution significantly changes at the propylene carbonate mole fraction of 0.4. These results and methodologies are expected to contribute to the further understanding of electrolyte solutions and ultimately lead to the optimization of electrolyte formulation for lithium-ion batteries.

Spatiotemporal Errors and Limitations of LDAPS-based Precipitation Forecast Data Used in Coastal Numerical Models (연안해양 수치모델에 활용되는 LDAPS 강우예측 자료의 시공간 오차와 한계점 연구)

  • Sung Eun Park;Junmo Jo;Kee Young Kwon;Kyunghoi Kim
    • Journal of the Korean Society of Marine Environment & Safety
    • /
    • v.30 no.5
    • /
    • pp.407-414
    • /
    • 2024
  • This study analyzed the spatiotemporal errors and limitations of LDAPS-based rainfall forecast data used in coastal ocean numerical models and verified their reliability by comparing them with the rainfall data for 2020 from three rain gauges located around Jinhae Bay, South Korea. The results indicated that although LDAPS-based rainfall data generally reproduced long-term trends, they exhibited significant discrepancies in short-term variations. The quantitative error in annual rainfall was 197.5 mm, which increased to 285.4 mm for summer, indicating that the difference in the cumulative rainfall prediction increases for seasons with high rainfall variability. Furthermore, the rainfall-time predictions exhibited a temporal delay of approximately 8 h, suggesting that temporal errors in the LDAPS-based rainfall data could significantly reduce the accuracy of coastal environment predictions. The indiscriminate use of these data, which fail to accurately reflect coastal rainfall, could lead to serious issues in predicting coastal environmental changes caused by pollutants or extreme rainfall events. Therefore, to appropriately use LDAPS-based rainfall data, it is necessary to improve their accuracy through comprehensive verifications and further refinements.

Factors Associated with Care Burden among Family Caregivers of Terminally Ill Cancer Patients (말기암환자 가족 간병인의 간병 부담과 관련된 요인)

  • Lee, Jee Hye;Park, Hyun Kyung;Hwang, In Cheol;Kim, Hyo Min;Koh, Su-Jin;Kim, Young Sung;Lee, Yong Joo;Choi, Youn Seon;Hwang, Sun Wook;Ahn, Hong Yup
    • Journal of Hospice and Palliative Care
    • /
    • v.19 no.1
    • /
    • pp.61-69
    • /
    • 2016
  • Purpose: It is important to alleviate care burden for terminal cancer patients and their families. This study investigated the factors associated with care burden among family caregivers (FCs) of terminally ill cancer patients. Methods: We analyzed data from 289 FCs of terminal cancer patients who were admitted to palliative care units of seven medical centers in Korea. Care burden was assessed using the Korean version of Caregiver Reaction Assessment (CRA) scale which comprises five domains. A multivariate logistic regression model with stepwise variable selection was used to identify factors associated with care burden. Results: Diverse associating factors were identified in each CRA domain. Emotional factors had broad influence on care burden. FCs with emotional distress were more likely to experience changes to their daily routine (adjusted odds ratio (aOR), 2.54; 95% confidence interval (CI), 1.29~5.02), lack of family support (aOR, 2.27; 95% CI, 1.04~4.97) and health issues (aOR, 5.44; 2.50~11.88). Family functionality clearly reflected a lack of support, and severe family dysfunction was linked to financial issues as well. FCs without religion or comorbid conditions felt more burdened. The caregiving duration and daily caregiving hours significantly predicted FCs' lifestyle changes and physical burden. FCs who were employed, had weak social support or could not visit frequently, had a low self-esteem. Conclusion: This study indicates that it is helpful to understand FCs' emotional status and family functions to assess their care burden. Thus, efforts are needed to lessen their financial burden through social support systems.