• Title/Summary/Keyword: STEPwise

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Effects of Family Function, Impulsive Behavior and Stress on Bullying Types of Adolescents (청소년의 가족기능, 충동성, 스트레스 수준이 집단따돌림 유형에 미치는 영향)

  • Lee, Hea-Shoon
    • The Journal of the Korea Contents Association
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    • v.14 no.2
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    • pp.319-329
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    • 2014
  • Purpose: The purpose of this study was to investigate the effect of adolescent's family function, impulsive behavior, stress on the bullying types. Method: Data were collected from 627 adolescents and analyzed using descriptive statistics, t-test, Pearson correlation coefficients and stepwise multiple regression with the SPSS 18.0. Results: The bullying types (injurer and victim) correlates with family function, impulsive behavior and stress. Stepwise multiple regression analysis showed emotional reactivity, non-planning impulsiveness, friends related stress, experience of drinking (yes), experience of parent depression problem (yes), explained 34.1% of the total variance in bully injurer. Stepwise multiple regression analysis showed communication, motor impulsiveness, friends related stress, gender (male), grade (junior high school), explained 30.9% of the total variance in bully victim. Conclusion: The results of this study are expected to be used as basic data in providing a better understanding of adolescents' bullying, in preventing bullying and in developing an intervention program.

Effect of Stepwise Communication Education Program using SBAR among Nursing Students: Focusing on Scenarios and Nursing Case-based Role Playing (간호대학생의 SBAR를 이용한 단계별 의사소통 교육프로그램의 효과: 시나리오와 간호사례기반 역할극을 중심으로)

  • Noh, Yoon Goo;Lee, Insook
    • The Journal of Korean Academic Society of Nursing Education
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    • v.24 no.2
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    • pp.115-126
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    • 2018
  • Purpose: This study intends to examine the effects of a stepwise communication education program among nursing college students, focusing on scenarios and nursing case-based role playing. Methods: The study design was a one-group repeated measure ANOVA. Participants were 27 nursing students in practice. Students participated in 5-week stepwise communication education program using SBAR; including 1 week of lecture education, 4 weeks of scenarios and nursing case-based role playing. The data were collected at each level of the education process: pre-education, after 1 week of lectures, and after completion of scenarios and nursing case-based role playing. Repeated measures ANOVA was used to determine changes in SBAR technique knowledge and communication self-efficacy. Results: The stepwise communication education program using SBAR was effective in increasing SBAR technique knowledge, and communication self-efficacy. The lecture-based education was effective only in the area of SBAR technique knowledge and its subscale, attitudes towards SBAR. However, scenarios and nursing case-based role playing was broadly effective across communication self-efficacy, SBAR technique knowledge, and its subscale, knowledge of the SBAR. Conclusion: Based on this study, we propose that it is necessary to confirm the effect of long-term SBAR communication education using scenarios and nursing case-based role playing in nursing students' practice.

Stepwise Production of Syngas and Hydrogen from Methane on Ferrite Based Media Added with YSZ (YSZ 첨가 페라이트 매체상에서 메탄으로부터 합성 가스 및 수소의 단계적 생산)

  • Je, Han-Sol;Cha, Kwang-Seo;Kim, Hong-Soon;Lee, Young-Seak;Park, Chu-Sik;Kim, Young-Ho
    • Transactions of the Korean hydrogen and new energy society
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    • v.21 no.1
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    • pp.50-57
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    • 2010
  • Stepwise production of syn-gas and hydrogen from methane on ferrite based media added with yttria-stabilized zirconia (YSZ) was carried out using a fixed bed infrared reactor. In this study, all M-ferrite (M=Co, Cu, Mn and Ni) media were prepared by co-precipitation method, and there the YSZ was added as a binder to improve thermal stability, reactivity, and resistance against carbon deposition. Most of the ferrite media containing YSZ showed the good redox property for temperature programmed reduction/oxidation (TPR/O) tests. Notably, the Cu-substituted ferrite medium with YSZ showed the great resistance against carbon deposition as well as the good reactivity for the stepwise production of syngas and hydrogen. Furthermore, it also showed the good durability without significant deactivation during five repeated cyclic tests.

Effect of Stepwise Doping on Performance of Green Phosphorescent Organic Light-Emitting Diodes (단계적 도핑구조에 따른 녹색 인광 유기발광 다이오드의 성능에 미치는 효과에 관한 연구)

  • Hwang, Kyo-Min;Lee, Song-Eun;Lee, Seul-Bee;Yoon, Seung-Soo;Kim, Young-Kwan
    • Journal of the Korean Applied Science and Technology
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    • v.32 no.1
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    • pp.1-6
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    • 2015
  • We investigated green phosphorescent organic light-emitting diodes with stepwise doping to improve efficiency roll-off and operational lifetime by efficient distribution of triplet excitons. The host material which was 4,4,N,N'-dicarbazolebiphenyl (CBP) of bipolar characteristic that can control the carrier in emitting layer (EML). When the EML devided into four parts with different doping concentration, each devices shows various efficiency roll-off and lifetime enhancement. The distribution of the carrier and excitons in the EML can be confirmed by using stepwise doping structure. The properties of device C exhibited luminous efficiency of 51.10 cd/A, external quantum efficiency of 14.88%, respectively. Lifetime has increased 73.70% compared to the reference device.

Optimal Parameter Design for a Cryogenic Submerged Arc Welding(SAW) Process by Utilizing Stepwise Experimental Design and Multi-dimensional Design Space Analysis (단계적 실험 설계와 다차원 디자인 스페이스 분석 기술을 통한 초저온 SAW 공정의 최적 용접 파라미터 설계)

  • Lee, Hyun Jeong;Kim, Young Cheon;Shin, Sangmun
    • Journal of Korean Society for Quality Management
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    • v.48 no.1
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    • pp.51-68
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    • 2020
  • Purpose: The primary objective of this research is to develop the optimal operating conditions as well as their associated design spaces for a Cryogenic Submerged Arc Welding(SAW) process by improving its quality and productivity simultaneously. Methods: In order to investigate functional relationships among quality characteristics and their associated control factors of an SAW process, a stepwise design of experiment(DoE) method is proposed in this paper. Based on the DoE results, not only a multi-dimensional design space but also a safe operating space and normal acceptable range(NAR) by integrating statistical confidence intervals were demonstrated. In addition, the optimal operating conditions within the proposed NAR can be obtained by a robust optimal design method. Results: This study provides a customized stepwise DoE method (i.e., a sequential set of DoE such as a factorial design and a central composite design) for Cryogenic SAW process and its statistical analysis results. DoE results can then provide both the main and interaction effects of input control factors and the functional relationships between the input factors and their associated output responses. Maximizing both the product quality with high impact strength and the productivity with minimum processing times simultaneously in a case study, we proposed a design space which can provide both acceptable productivity and quality levels and NARs of input control factors. In order to confirm the optimal factor settings and the proposed NARs, validation experiments were performed. Conclusion: This research may provide significant contributions and applications to many SAW problems by preparing a standardization of the functional relationship between the input factors and their associated output response. Moreover, the proposed design space based on DoE and NAR methods can simultaneously consider a number of quality characteristics including tradeoff between productivity and quality levels.

Effects of Multi-stepwise TPSM on Improving the Behavior of H-beam bridge (H형강 교량의 성능개선을 위한 다단계 온도프리스트레싱 효과 분석)

  • Ahn, Jin Hee;Kim, Jun Hwan;Jung, Chi Young;Kim, Sang Hyo
    • Journal of Korean Society of Steel Construction
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    • v.19 no.5
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    • pp.527-537
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    • 2007
  • The main girders and cross-beams of an H-beam bridge consisted of factory-made H-beams, providing better conditions for quality control. Also, on-site fabrication works can be minimized and most of the stiffeners can be omitted, enabling simple and economic construction. In this study, the effect of the Multi-Stepwise TPSM (M-TPSM) on improving the maximum span length and section efficiency is analyzed. Compared to a 30-m-long, five-girder conventional plate girder bridge, structural analysis results showed that 50.7~55.1% of the girder height and 24.1~26.2% of the self-weight may be reduced by the application of M-TPSM to a five-girder H-beam bridge constructed with H-$900{\times}300$beams. In case of conventional H-beam bridges without M-TPSM, it was found that seven girders are required for a similar level of load-carrying capacity. Therefore, it is concluded that by the application of the M-TPSM, the H-beam bridge would become one of most cost-competitive options for short- and medium-span bridges.

Leukocyte Segmentation using Saliency Map and Stepwise Region-merging (중요도 맵과 단계적 영역병합을 이용한 백혈구 분할)

  • Gim, Ja-Won;Ko, Byoung-Chul;Nam, Jae-Yeal
    • The KIPS Transactions:PartB
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    • v.17B no.3
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    • pp.239-248
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    • 2010
  • Leukocyte in blood smear image provides significant information to doctors for diagnosis of patient health status. Therefore, it is necessary step to separate leukocyte from blood smear image among various blood cells for early disease prediction. In this paper, we present a saliency map and stepwise region merging based leukocyte segmentation method. Since leukocyte region has salient color and texture, we create a saliency map using these feature map. Saliency map is used for sub-image separation. Then, clustering is performed on each sub-image using mean-shift. After mean-shift is applied, stepwise region-merging is applied to particle clusters to obtain final leukocyte nucleus. The experimental results show that our system can indeed improve segmentation performance compared to previous researches with average accuracy rate of 71%.

Design and Theoretical Analysis of a Stepwise Intrusion Prevention Scheme (단계적 비정상 트래픽 대응 기법 설계 및 이론적 분석)

  • Ko Kwangsun;Kang Yong-hyeog;Eom Young Ik
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.16 no.1
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    • pp.55-63
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    • 2006
  • Recently, there is much abnormal traffic driven by several worms, such as Nimda, Code Red, SQL Stammer, and so on, making badly severe damage to networks. Meanwhile, diverse prevention schemes for defeating abnormal traffic have been studied in the academic and commercial worlds. In this paper, we present the structure of a stepwise intrusion prevention system that is designed with the feature of putting limitation on the network bandwidth of each network traffic and dropping abnormal traffic, and then compare the proposed scheme with a pre-existing scheme, which is a True/False based an anomaly prevention scheme for several worm-patterns. There are two criteria for comparison of the schemes, which are Normal Traffic Rate (NTR) and False Positive Rate (FPR). Assuming that the abnormal traffic rate of a specific network is $\beta$ during a predefined time window, it is known that the average NTR of our stepwise intrusion prevention scheme increases by the factor of (1+$\beta$)/2 than that of True/False based anomaly prevention scheme and the average FPR of our scheme decrease by the factor of (1+$\beta$)/2.

An Experimental Study on Transient Characteristics of PEM Fuel Cell Stack (PEM 연료전지 스택의 과도상태 출력특성에 관한 실험적 연구)

  • Kim, Hyun-il;Hwang, Jae-Soon;Chung, Tae-Yong;Shin, Dong-Hoon;Nam, Jin-Hyun;Kim, Young-Gyu
    • Proceedings of the KSME Conference
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    • 2007.05b
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    • pp.2003-2008
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    • 2007
  • The transient power characteristics of a PEM fuel cell stack was experimentally studied using a commercial 1.2kW PEM fuel cell ($Nexa^{TM}$ Power Module, Ballard Power System Inc.). The conditions in PEM fuel cell stack such as temperature and water content change rather slowly because of their large heat capacity and long channel length, which results in long transient time to converge to a steady state. The steady characteristics of the PEM fuel cell module was determined first, followed by the measurement of its transient characteristics upon stepwise and continuous load current changes. During the stepwise current change from 5A to 25A, the output voltage initially decreased below the steady voltage and then increased gradually. Similar behavior was also observed for the stepwise current change from 25A to 5A. This transient behavior is explained with reference to the evolution of the temperature and water content of the PEM fuel cell stack.

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Validation of Nursing Care Sensitive Outcomes related to Knowledge (지식에 관한 간호결과도구의 타당성 조사)

  • 이은주
    • Journal of Korean Academy of Nursing
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    • v.33 no.5
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    • pp.625-632
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    • 2003
  • Purpose: The purpose of this study was to assess the importance and sensitivity to nursing interventions of four nursing sensitive nursing outcomes selected from the Nursing Outcomes Classification (NOC). Outcomes for this study were 'Knowledge: Diet', 'Knowledge: Disease Process', 'Knowledge: Energy Conservation', and 'Knowledge: Health Behaviors'. Method: Data were collected from 183 nurses working in 2 university hospitals. Fehring method was used to estimate outcome and indicators' content and sensitivity validity. Multiple and stepwise regression were used to evaluate relationships between each outcome and its indicators. Result: Results confirmed the importance and nursing sensitivity of outcomes and their indicators. Key indicators of each outcomes were found by multiple regression. 'Knowledge: Diet' was suggested for adding new indicators because the variance explained by indicators was relatively low. Not all of the indicators selected for stepwise regression model were rated for highly in Fehring method. The R² statistics of the stepwise regression models were between 18 and 63% in importance by selected indicators and between 34 and 68% in contribution by selected indicators. Conclusion: This study refined what outcomes and indicators will be useful in clinical practice. Further research will be required for the revision of outcome and indicators of NOC. However, this study refined what outcomes and indicators will be useful in clinical practice.