• Biotechnology and Bioprocess Engineering:BBE
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• 제8권6호
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• pp.349-353
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• 2003

The physiological characteristics of cultures of very high cell mass (e.g. 10g cell mass/L), termed“ultrahigh cell density cultures”is reviewed. A close relationship was found between the length of the optical path (OP) in flat-plate reactors and the optimal cell density of the culture as well as its areal (g m$\^$-2/ day$\^$-1/) productivity. Cell-growth inhibition (GI) unfolds as culture density surpasses a certain threshold. If it is constantly relieved, a 1.0cm OP reactor could produce ca. 50% more than reactors with longer OP, e.g. 5 or 10cm. This unique effect, discovered by Hu et al. [3], is explained in terms of the relationships between the frequency of the light-dark cycle (L-D cycle), cells undergo in their travel between the light and dark volumes in the reactor, and the turnover time of the photosynthetic center (PC). In long OP reactors (5cm and above) the L-D cycle time may be orders of magnitude longer than the PC turnover time, resulting in a light regime in which the cells are exposed along the L-D cycle, to long, wasteful dark periods. In contrast, in reactors with an OP of ca. 1.0 cm, the L-D cycle frequency approaches the PC turnover time resulting in a significant reduction of the wasteful dark exposure time, thereby inducing a surge in photosynthetic efficiency. Presently, the major difficulty in mass cultivation of ultrahigh-density culture (UHDC) concerns cell growth inhibition in the culture, the exact nature of which is awaiting detailed investigation.

• 한국조리학회지
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• 제9권4호
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• pp.13-36
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• 2003

The aim of this study was to understand how the employee satisfaction effect to their turnover trends through the survey on the employee satisfaction and the turnover trend in the pastry and bakery department on the objection of the employee of the bakers of the luxurious hotels in Seoul area. The study was selected to study the luxurious hotels located in Seoul area and make the objection of the employee in the pastry and bakery kitchen. As the contents of the assumption of the study, the independent variable was ' the pastry and bakery employee's organizational factor ', and the dependant variables were ' job satisfaction of the pastry and bakery employee ', ' turnover trends of the pastry and bakery employee ' and implicates the comparison and the mutual relationship between variables to shows the confirmation of them. As the measurement tools, it adopted the reliability analysis, the technical statistics analysis, the frequency analysis, cross-section analysis and on the verification of the assumption, it was used linear regression analysis. The result of the study showed that the satisfaction degree toward the work schedule showed to be as the personal elements while the systematic organizational establishment and the management policy, the work capacity and the job placement, the cooperation with other parts and the operation of the work time showed to be as the organizational elements. The job satisfaction elements showed as the satisfaction on the system and the rule of the job, the satisfaction on the right and belonging, the satisfaction on the achievement and the communication. As regarded to the job turnover, the turnover intention concerned the opportunity, disappointment of assignment, general complaint, and work condition. Those were shown to be elements of the job satisfaction and the turnover of the employee. And also, that were necessary to manage the job satisfaction and the turnover of the employee concerning these factors.

• Asian Journal of Business Environment
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• 제5권2호
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• pp.31-36
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• 2015

Purpose - This work aims to study the existing management process and methods of statistical evaluation of personnel mobility management, and propose improvement measures. This is particularly relevant in today's market economy because proper organization of personnel movement affects the availability and effective utilization of human resources in enterprises. Hence, it influences the volume, timely execution of work, equipment efficiency, and consequently the volume of production, its cost, profit, and other economic indicators. Research design, data, and methodology - We investigate the indicators that measure staff mobility, and their dependent consequences. Further, it analyses the factors influencing high staff turnover, which is a main indicator of staff mobility. Results - Measures for staff mobility development and prevention of turnover are proposed. Micom Systems is a sample case that has developed special programs to reduce staff turnover. Conclusions - Staff mobility leads to additional costs, significant loss of working time, and increase in defects. However, the advantages of staff mobility outweigh these negative factors. The role of staff mobility in a market economy cannot be overestimated.

• 산업노동연구
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• 제23권2호
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• pp.195-230
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• 2017

본 연구는 청년패널데이터(2009년~2014년)를 병합하여 청년취업자의 기업규모별 이직 결정요인 및 임금효과를 분석하였으며, 그 결과는 다음과 같다. 첫째, 기업규모별 이직률(정규직 기준)은 소기업 25.6%, 중기업 25.1%, 대기업 17.2%로 나타나 기업규모가 클수록 이직률이 낮았다. 둘째, 청년취업자의 이직사유는 근로조건 불만 40.3%, 직무불일치 39.2%, 개인사유 11.8%순으로 나타났으며, 직무불일치에 따른 이직은 중소기업(38.5%)보다 대기업(41.5%)이 더 높았다. 셋째, 이직여부에 따른 직장만족도와 직무-전공 일치성을 분석한 결과, 모든 영역에서 직장만족도와 직무-전공 일치성이 낮을수록 이직률이 높았다. 넷째, 패널회귀분석을 통해 기업규모별 이직 결정요인을 분석한 결과, 이직에 유의한 영향을 미친 변수는 임금과 고용형태 등 객관적 근로조건뿐만 아니라 직장만족도와 직무-전공일치도 변수 등도 이직률을 낮추는 것으로 분석되었다. 다섯째, 이직여부에 따른 임금격차는 이직한 청년취업자가 3.1%정도 낮았으며, 이러한 임금격차는 시간의 흐름에 따라 더욱 확대되었다. 다만 고용형태(비정규직${\rightarrow}$정규직)와 기업규모(중소기업${\rightarrow}$대기업)가 변경된 이직은 그렇지 않았다. 따라서 청년취업자들의 이직률을 낮추기 위해서는 객관적 근로조건과 더불어 전반적인 직장만족도와 직무-전공 일치성을 높일 필요가 있으며, 청년취업자는 이직을 하는 것 보다는 동일한 기업에 장기간 근무하는 것이 합리적 선택이라고 할 수 있다.

• Journal of Chest Surgery
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• 제48권4호
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• pp.258-264
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• 2015

Background: This study aimed to evaluate the therapeutic results and safety of pectoralis major muscle turnover flaps in the treatment of mediastinitis after coronary artery bypass grafting (CABG) procedures. Methods: Data regarding 33 patients with post-CABG deep sternal wound infections (DSWIs) who underwent pectoralis major muscle turnover flap procedures in the Emam Reza and Ghaem Hospitals of Mashhad, Iran were reviewed in this study. For each patient, age, sex, hospital stay duration, remission, recurrence, and associated morbidity and mortality were evaluated. Results: Of the 2,447 CABG procedures that were carried out during the time period encompassed by our study, DSWIs occurred in 61 patients (2.5%). Of these 61 patients, 33 patients (nine females [27.3%] and 24 males [72.7%]) with an average age of $63{\pm}4.54$ years underwent pectoralis major muscle turnover flap placement. Symptoms of infection mainly occurred within the first 10 days after surgery (mean, $10.24{\pm}13.62days$). The most common risk factor for DSWIs was obesity (n=16, 48.4%) followed by diabetes mellitus (n=13, 39.4%). Bilateral and unilateral pectoralis major muscle turnover flaps were performed in 20 patients (60.6%) and 13 patients (39.4%), respectively. Complete remission was achieved in 25 patients (75.7%), with no recurrence in the follow-up period. Four patients (12.1%) needed reoperation. The mean hospitalization time was $11.69{\pm}6.516days$. Four patients (12.1%) died during the course of the study: three due to the postoperative complication of respiratory failure and one due to pulmonary thromboembolism. Conclusion: Pectoralis major muscle turnover flaps are an optimal technique in the treatment of post-CABG mediastinitis. In addition to leading to favorable therapeutic results, this flap is associated with minimal morbidity and mortality, as well as a short hospitalization time.

• 한국항공운항학회지
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• 제16권3호
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• pp.38-49
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• 2008

Recently industries have started to recognize the importance of word-of-mouth marketing and human resource management especially for airline industries who suffer from pilot shortage. Pilots are very important component of airline company and require a lot of money and time to assession, training and maintaining certified license validity. This study is to test the effect of airline pilot's organizational identification, emotional exhaustion and perceived justice on turnover intention and negative word-of-mouth on airline union pilots returned from the strike. This study used both literary method and empirical method. The researcher did literary study based on the previous study, designed the research model and hypothesis, did questionnaire survey to the Union member pilot from year 2005 strike for the subject of study to verify hypothesis and analysed empirically the finding using SPSS12.0 program. The major findings of this study may be summarized as follows, (1) organizational identification has a negative effect on turnover intention and negative word-of-mouth, (2) emotional exhaustion has a positive effect on turnover intention and negative word-of-mouth, (3) perceived justice has a negative effect on turnover intention and negative word-of-mouth.

• Asia pacific journal of information systems
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• 제11권1호
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• pp.45-60
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• 2001

Recruiting and maintaining capable IS personnel is crucial to on-time application developments and information services that can gear to corporate strategic planning and to achieve corporate goals and objectives. A shortage of fine IS staff has been always a threat to providing satisfactory IS services and a constraint that holds companies back to expand further and operate more efficiently. Therefore, it is necessary to understand factors that satisfy IS personnel and then restrain them not to leave their current job positions. However, little study has been done about what these factors are and how these factors are related to the turnover intention each other especially using domestic data. Therefore, this study suggested a structural turnover intention model and investigated relationships among the selected factors including demographic variables, career-related variables, job satisfaction, career satisfaction, organizational commitment and turnover intentions. Major findings are: i) overall, career-related variables, job satisfaction and organizational commitment significantly determine the turnover intention, ii) contrary to the U.S. studies, our IS people tend to show lower organizational commitment as they become older and get more experience, and iii) contrary to the U.S.'s findings, career-related variables are negatively related to organizational commitment. Implications and discussions of these findings are also described.

• 한국콘텐츠학회논문지
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• 제8권4호
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• pp.197-210
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• 2008

본 연구는 고객과 직접적인 대면을 하지 않고 전화를 이용하여 감정노동(emotional labor)을 수행하는 콜센터 상담원들의 감정노동의 결과로 표출되는 감정소진(emotional exhaustion)과 이직의도에 영향을 주는 요인을 연구하였다. 본 연구는 감정소진이 직무만족을 저해시켜 이직의도를 높이는 것으로 이직율이 높은 콜센터 운영에서 관리하여야할 중요한 요소라는 것을 실증하였다. 감정소진을 낮추기 위해서는 시간적 압력을 낮추고 업무의 자율성을 부여하여야 하며, 이직의도를 낮추는 위해서는 상사지원이 중요한 요소로 나타났다. 본 연구는 콜센터 운영에 있어서 감정노동이 상담원의 관리에 중요하다는 것을 제시하였다는 데 의의 가 있다.

• 한국컴퓨터정보학회논문지
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• 제13권5호
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• pp.291-308
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• 2008

본 연구는 고객과 직접적인 대면을 하지 알고 전화를 이용하여 감정노동(emotional labor)을 수행하는 콜센터 상담원들의 감정노동의 결과로 표출되는 감정소진(emotional exhaustion)에 영향을 주는 요인을 연구하였다. 본 연구는 감정소진이 직무만족을 저해시켜 이직의도를 높이는 것으로 이직율이 높은 콜센터 경영에서 관리하여야할 중요한 요소라는 것에 대한 실증적인 증거를 제시하였다. 감정소진을 낮추기 위해서는 시간적 압력을 낮추고 업무의 자율성을 부여하여야 하며, 이직의도를 낮추는 위해서는 상사지원이 중요한 요소로 나타났다. 본 연구의 의의는 콜센터 경영에 있어서 감정노동이 상담원의 관리에 중요하다는 것을 제시하였다는 것이다.

• 한국체육학회지인문사회과학편
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• 제54권4호
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• pp.329-345
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• 2015

본 연구는 한국프로축구팀 감독교체가 팀 경기성과에 미치는 효과를 경영학의 조직학습이론을 적용하여 규명하고자 하였다. 1983년 시즌부터 2013년 시즌까지 30년 동안의 19개 팀과 96명의 감독에 대한 307개의 팀-연도 데이터를 기반으로 패널데이터를 구성하였고, 최종적으로 226개의 팀 데이터가 실증분석에 투입되었다. 자동상관 및 이분산성의 문제를 해결하기 위하여 고정효과 일반화최소자승법(Fixed Effect Generalized Least Square Regression)을 사용하여 분석하였으며 연구결과는 다음과 같다. 첫째, 감독교체는 팀 경기성과와 부(-)의 관계를 가지는 것으로 나타났다. 둘째, 시즌기간(on-season)의 감독교체는 팀 경기성과에 부정적인 영향을 미치는 것으로 나타났다. 시즌기간에 감독을 교체하는 경우 악순환이론 관점이 적용되는 것으로 확인되었다. 셋째, 비시즌기간(off-season)의 감독교체는 팀 경기성과에 긍정적인 영향을 미치는 것으로 나타났다. 비시즌기간에 지도자를 교체하는 경우 상식이론 관점이 적용되는 것으로 확인되었다. 넷째, 시즌기간의 감독교체와 비시즌기간의 감독교체 간의 팀 경기성과의 차이를 비교한 결과, 비시즌기간의 감독교체가 시즌기간의 감독교체에 비해 유의한 팀 경기성과를 보였다. 다섯째, 감독교체가 발생한 경우 후임감독으로 내부출신을 선호하는 것으로 나타났다. 여섯째, 내부출신감독은 팀 경기성과에 부정적인 영향을 미치는 것으로 나타났다. 일곱째, 감독교체와 팀 경기성과 간의 부(-)의 관계 사이에는 내부출신감독요인이 매개 역할을 하는 것으로 나타났다. 본 연구는 프로축구산업 현장에서 팀 경기성과의 향상을 위한 감독교체가 필요할 때 후임 감독이 역량을 효과적으로 발휘할 수 있는 교체시기에 대한 시사점을 제공한다.