• 한국농공학회논문집
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• 제54권4호
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• pp.93-103
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• 2012

A suction-saturation control technique based on flow pump system was developed to investigate hydraulic properties in unsaturated soils. The flow pump system is designed based on the principle of the axis-translation technique and triaxial equipment, and gives the suction-time and suction-saturation curves, the primary relationship needed for interpreting the response of unsaturated soils and link between theory and the material properties in unsaturated soil mechanics. Using the suction-saturation control technique, suction-time relationship and soil-water retention curve (SWRC) during hydraulic hysteresis were investigated with different net confining pressures and porosities. Three types of soils-two sands and a silt were used in this paper. This paper showed the effect of the hysteresis on the SWRC due to different net confining pressures and porosities. This means that a careful decision must be made as to which condition is to be modeled, since the delicate difference of the conditions in physical modeling can cause the different experimental output.

• 한국물환경학회지
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• 제26권3호
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• pp.468-473
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• 2010

The purpose of this study is to derive the correlation between the Specific Phosphorus Release Rate (SPRR), Specific Phosphorus Uptake Rate (SPUR) and Specific Oxygen Uptake Rate (SOUR) at various Sludge Retention Time (SRT) condition in the A/O process. The laboratory scale reactor was operated on various SRT (10 day, 20 day, 30 day, 40 day). In this study, the SPRR, SPUR and SOUR tended to decrease with the SRT increase. Empirical equations was be obtained $y=4.54E-006x^2+0.0007x-0.0315$, $R^2=0.925$ (SOUR vs. SPRR) and $y=3.22E-006x^2+0.0004x-0.0173$, $R^2=0.928$ (SOUR vs. SPUR) from the relationship between SRT, SPRR and SPUR and SOUR. Therefore, the anaerobic tank design based on the research result such as SPRR, SPUR of a phosphorus design and SOUR would be possible.

• The Journal of Korean Physical Therapy
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• 제22권6호
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• pp.43-51
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• 2010

Purpose: This study examined the influence of visuomotor congruency on learning a relative phase relationship between a single joint movement and an external signal. Methods: Participants (N=5) were required to rhythmically coordinate elbow flexion-extension movements with a continuous sinusoidal wave (0.375 Hz) at a $90^{\circ}$ relative phase relationship. The congruent group was provided online feedback in which the elbow angle decreased (corresponding to elbow flexion) as the angle trajectory was movingup, and vice versa. The incongruent group was provided online feedback in which the elbow angle decreased as the angle trajectory was moving down, and vice versa. There were two practice sessions (day 1 and 2) and each session consisted of 6 trials per block (5 blocks per session). Retention tests were performed 24 hours after session 2, and only the external sinusoidal wave was provided. Repeated ANOVAs were used for statistical analysis. Results: During practice, the congruent group was significantly less variable than the incongruent group. Phase variability in the incongruent group did not significantly change across blocks, while variability decreased significantly in the congruent group. In retention, the congruent group produced the required $90^{\circ}$ relative phase pattern with significantly less phase variability than the incongruent group. Conclusions: Congruent visual feedback facilitates learning. Moreover, the deprivation of online feedback does not affect the congruent group but does affect the incongruent group in retention.

• Bulletin of the Korean Chemical Society
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• 제27권2호
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• pp.211-218
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• 2006

This work deals with 24 substances composed of nitrogen-containing heterocycles. The relationships between the chromatographic retention factor (k) and those physicochemical properties which are relevant in quantitative structure-properties relationship (QSPR) studies, such as the polarizability $(\alpha)$, molar refractivity (MR), lipophilicity (logP), dipole moment $(\mu)$, total energy $(E_{tot})$, heat of formation $(\Delta H_f)$, molecular surface area $(S_M)$, and binding energy $(E_b)$, were investigated. The accuracy of the simple linear regressions between the chromatographic retention and the descriptors for all of the compounds was satisfactory (correlation coefficient, $0.8 \leq r \leq 1.0$). The QSPR models of these nitrogen-containing heterocyclic compounds could be predicted with a multiple linear regression equation having the statistical index, r = 1.000. This work demonstrated the successful application of the multiple linear approaches through the development of accurate predictive equations for retention factors in liquid chromatography.

• 간호행정학회지
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• 제15권2호
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• pp.182-192
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• 2009

Purpose: This study aimed to investigate the impact of nursing professionalism on the nursing performance, job satisfaction and retention intention among clinical nurses. Methods: A descriptive correlational research design was used for this study. All 329 clinical nurses were obtained by convenience sampling from 3 National or public hospitals, 3 university hospitals, and two private hospitals located in Seoul and Kyunggi province. The data were collected using a self-reporting questionnaire contained four instruments and questions for demographic characteristics of subjects from April 21st to September 1st, 2008. Collected data were analyzed on SPSS Win 16.0. Results: There was a significant relationship between nursing professionalism, nursing performance, job satisfaction and retention intention among clinical nurses. The nursing professionalism was identified as a predictor of nursing performance, job satisfaction, and retention intention. Conclusion: The strategies to promote and enhance the nursing professionalism of clinical nurses, in this era in which the nursing shortage become more and more problematic issue, are needed to design and be integrated into the management of human resource in nursing organizations.

• The Journal of Asian Finance, Economics and Business
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• 제9권2호
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• pp.229-242
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• 2022

Creating a new retailing environment to meet the seamless experience requirements of consumers is a challenge for Omnichannel-related businesses. Based on the "appraisal-emotion-response" chain, the purpose of this research is to explore the psychological mechanism of omnichannel integration influencing customer retention and the moderating effect of customer showrooming experience. This research uses a structural equation model in partial least square software to analyze a two-stage survey (Study 1: n = 210; Study 2: n = 342) conducted in China. The results show that channel control experience has three dimensions: perceived channel attribute familiarity, channel type matching, and cross-channel access convenience; consistent interactive experience has two dimensions: information cross-channel consistency and cross-channel service support. Furthermore, both channel control experience and consistent interactive experience are favorable for customer retention through increased customer satisfaction (transactional and retailer satisfaction). Finally, customer showrooming experience positively moderates the relationship between consistent interactive experience and customer satisfaction. This research proposes a self-regulation process model to explain how omnichannel integration enhances consumers' experience, finally leading to consumer retention. The findings contribute to the omnichannel retail business literature and provide management implications for Asian retailers to implement an omnichannel business strategy.

• The Journal of Asian Finance, Economics and Business
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• 제9권3호
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• pp.171-180
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• 2022

Employee retention is becoming a crucial idea for businesses that aim to improve their performance, resulting in an increasing emphasis on the topic in today's society. Employee retention refers to an organization's ability to retain its employees. The retention of workers may be viewed as a technique used by companies to retain their personnel since it is linked to employer efforts to maintain their staff. Online surveys were initially done between April and July 2021. Furthermore, the study's primary focus was employees of small and medium enterprises. To collect data, the questionnaires were distributed through Google forms. The survey used a snowballing technique because the questionnaires were circulated among the participants. Based on the results, the research found that Perceived Organizational Support (POS) and Perceived Organizational Justice (POJ) mediate the relationship of Value Congruence (VC) and Job Characteristics (JS) and employee retention in the Lebanese Retail Sector. Employees appreciate POS because it satisfies their desires for acceptance, esteem, and connection and offers comfort during times of stress. Employers must give priority to equal effort to ensure equitable treatment for workers at work. By integrating justice and equality in all departments, the performance of workers may be enhanced.

• 융합정보논문지
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• 제12권1호
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• pp.55-65
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• 2022

본 연구는 고객과 인플루언서의 관계품질을 감정적 관계품질(Hot IRQ)과 인지적 관계품질(Cold IRQ)로 구분하고 이러한 관계품질에 영향을 미치는 선행변수와 그리고 이러한 관계품질로 인해 야기되는 고객행동반응을 탐구하고자 한다. 관계품질의 선행요인으로 고객경험(감정적, 인지적 경험)을 제시하였고, 결과요인으로 관계유지의도와 추천의도를 제시하였다. 가설검증을 위해 일반소비자를 대상으로 설문조사를 실시하였고 431부가 최종적 분석에 사용되었다. 연구결과, 고객경험 중에서 감정적 경험은 Cold IRQ보다 Hot IRQ에 더 큰 영향을 미치는 것으로 나타났고, 인지적 경험은 Hot IRQ보다 Cold IRQ에 더 큰 영향을 미치는 것으로 나타났다. 그리고 Hot IRQ는 추천의도보다 관계유지의도에 더 큰 영향을 미치는 것으로 나타났고, Cold IRQ는 관계유지의도 보다 추천의도에 더 큰 영향을 미치는 것으로 나타났다. 본 연구는 고객과 인플루언서의 관계품질에 대해 살펴봄으로써 이론적, 실무적 측면에서 다양한 시사점을 제공하고 있다.

• Asian-Australasian Journal of Animal Sciences
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• 제25권4호
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• pp.471-478
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• 2012

The role of moisture absorptive capacity of pre-silage material and its relationship with silage effluent in high moisture by-product feedstuffs (HMBF) is assessed. The term water retention capacity which is sometimes used in explaining the rate of effluent control in ensilage may be inadequate, since it accounts exclusively for the capacity of an absorbent incorporated into a pre-silage material prior to ensiling, without consideration to how much the pre-silage material can release. A new terminology, 'potential water retention capacity' (PWRC), which attempts to address this shortcoming, is proposed. Data were pooled from a series of experiments conducted separately over a period of five years using laboratory silos with four categories of agro by-products (n = 27) with differing moisture contents (highest 96.9%, lowest 78.1% in fresh matter, respectively), and their silages (n = 81). These were from a vegetable source (Daikon, Raphanus sativus), a root tuber source (potato pulp), a fruit source (apple pomace) and a cereal source (brewer's grain), respectively. The pre-silage materials were adjusted with dry in-silo absorbents consisting wheat straw, wheat or rice bran, beet pulp and bean stalks. The pooled mean for the moisture contents of all pre-silage materials was 78.3% (${\pm}10.3$). Silage effluent decreased (p<0.01), with increase in PWRC of pre-silage material. The theoretical moisture content and PWRC of pre-silage material necessary to stem effluent flow completely in HMBF silage was 69.1% and 82.9 g/100 g in fresh matter, respectively. The high correlation (r = 0.76) between PWRC of ensiled material and silage effluent indicated that the latter is an important factor in silage-effluent relationship.

• 융합정보논문지
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• 제10권7호
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• pp.207-214
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• 2020

본 연구는 치과위생사의 직업 정체성이 직업유지에 미치는 영향을 파악하고자 경남 부산 지역 내 치과위생사 155명을 대상으로 연구 윤리 심의위원회에서 심의를 받고 설문 조사를 시행하였다(1041449-201912-HR-003). 자료 분석은 직업 정체성의 3가지 세부항목이 직업유지에 미치는 영향을 단계별로 확인하기 위해 위계적 회귀분석을 시행하였으며 그 결과, 직업 정체성 세부항목 중 직업에 대한 감정이입(β=.358, p<.001), 직업과 개인의 연관(β=.562, p<.001), 직업과 일체감(β=.734, p<.001)의 순으로 직업유지에 영향력이 있었다. 따라서 치위생(학)과의 교육기관에서 조금 더 포괄적인 의미의 직업 정체성에 대한 수업을 시행한다면 직업유지에 도움이 될 것으로 판단한다.