• Journal of Microbiology and Biotechnology
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• v.20 no.4
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• pp.757-762
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• 2010

Cronobacter is a major foodborne pathogen in powdered infant formula and can lead to serious developmental after-effect and death to infants. The contamination of Cronobacter may be a high risk for the powdered foods. To isolate and identify Cronobacter from the powdered foods such as powdered infant formula and Saengsik in Korea, a conventional culture method, rapid identification system, PCR, and 16S rDNA sequencing were performed. As the results of isolation, seven Cronobacter spp. were isolated from seven out of 102 powdered infant formulas and 41 Cronobacter were isolated from 41 out of 86 Saengsiks. Forty-eight Cronobacter isolates were identified to be C. sakazakii and C. dublenisis by 16S rDNA sequence analysis. Most of the isolates were C. sakazakii and 13% of the isolates were C. dublinesis. One fourth of the C. sakazakii isolates showed different biochemical characteristics of negative nitrate reduction and nonmotility activities compared with the other strains reported previously.

• International Journal of Highway Engineering
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• v.14 no.4
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• pp.1-8
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• 2012

PURPOSES : Skid resistance on pavements plays an important role in reducing the risk of vehicle skidding on wet surface particularly. Almost 9.3 percent of traffic accidents were occurred under rainy condition and these are over-represented in terms of the severity of the crashes. Recently, unusual weather conditions referred widely as the intensified rainfalls justify the need of a systematic management of skid resistance. In this context, the study carried out the observational study on the skid resistance characteristics of different types of pavement with the time passage. METHODS : This study measured the skid resistance with Pavement Friction Tester at three times within five years. The skid resistance measurement has followed the method suggested by ASTM. RESULTS : As the main results under the scope of this study, skid resistance of asphalt concrete has not nearly reduced with time. On the contrary, skid resistance of cement concrete has been rapidly reduced with time though the highest resistance was gained at the early observation. Porous asphalt concrete shows a steady decrease of skid resistance with time, anyway, the reduction rate according to the increase of measurement speeds is relatively lower than the others. CONCLUSIONS : Based on our study, skid resistance of the pavement should be regarded as one of the pavement management system, so periodic measurement should be made to assure road safety as a whole.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1996.04a
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• pp.213-216
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• 1996

R'||'&'||'D project management is a process of decisions concerned with the achievement of goals of objectives. Especially, defense R'||'&'||'D project planning is the key in the successfull management of defense development. The defense project managers are constantly having to perform "what if\ulcorner" exercise, such as what if the project is extended out for an additional cost\ulcorner In this reserch, we developed a schedule-cost analysis model based upon Critical Path Method(CPM) and Venture Evaluation and Review Technique(VERT) for schedule-cost trade off analysis defense R'||'&'||'D projects. In the first step, a deterministic model is developed as a heuristic which deterministic model is developed as a heuristic which determines the schedule extension and reduction cost as a function desired schedule. In the second step, a stochastic network simulation model is developed to analyse the project risk (sucess and failure). The expected time and cost can be determined for desired schedule under the assumptions of stochastic arc data (time and cost) with a various precedence relationships. This model provides the defense R'||'&'||'D managers with an estimated and expected cost for curtailing or extending a project a given amount of time. The effectiveness and efficiency of the proposed methods, a heuristic and stochastic networks simulations, have been demonstrated through examples.

• Journal of the Korean Operations Research and Management Science Society
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• v.39 no.3
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• pp.117-131
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• 2014

As interests in the management of government-owned corporation rise, in these days, debt reduction and normalization of management of those companies have been proceeding under the lead of government. At this point, it is very important to seek internal marketing method for improvement of internal employees' satisfaction, loyalty and organization performance. This study analyzes impact of factors of internal marketing effect on organization satisfaction, loyalty and organization performance in the context of the domestic public companies, the Korea Electric Power Corporation (KEPCO) and the Korea Water Resources Corporation (K-WATER)'s employees empirically. There are some significant differences between the two publics. It is proved that delegation of the authority influences on internal satisfaction and organization performance in the case of KEPCO, and education and training influence on internal satisfaction and organization performance in the case of K-WATER. On the other hand, in the case of K-WATER, any internal marketing factors don't influence on loyalty. The results of this study show somewhat different characteristics depending on the characteristics of firm, however, it is expected that this study can be very useful in regards to similar public enterprises or businesses.

• Proceedings of the KSRS Conference
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• v.1
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• pp.297-300
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• 2006

The knowledge of fuel load and composition is important for planning and managing the fire hazard and risk. However, fuel mapping is extremely difficult because fuel properties vary at spatial scales, change depending on the seasonal situations and are affected by the surrounding environment. Remote sensing has potential of reduction the uncertainty in mapping fuels and offers the best approach for improving our abilities. This paper compared the results of object-oriented classification to a pixel-based classification for fuel type map derived from Hyperion hyperspectral data that could be enable to provide this information and allow a differentiation of material due to their typical spectra. Our methodological approach for fuel type map is characterized by the result of the spectral mixture analysis (SMA) that can used to model the spectral variability in multi- or hyperspectral images and to relate the results to the physical abundance of surface constitutes represented by the spectral endmembers. Object-oriented approach was based on segment based endmember selection, while pixel-based method used standard SMA. To validate and compare, we used true-color high resolution orthoimagery

• Research in Community and Public Health Nursing
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• v.16 no.2
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• pp.167-176
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• 2005

Purpose: The purpose of this study was to identify factors to predict of condom use for the prevention of sexually transmitted diseases (STDs) among sex workers in a Korean community. The theoretical ground of this study was the Interaction Model of Client Health Behavior. Method: A descriptive, cross sectional and retrospective research design was employed in this study. A total of 100 sex workers who take a clinical check-up on STDs regularly at W Public Health Center were recruited by convenient sampling, and with consent to participate in this study. All of the measures were piloted, and the reliability of each scale ranged from 0.7 to 0.9. Data were analyzed using discriminating function analysis with SPSS-PC. Results: Five independent measures (partner preference for using condoms, subjects desire to prevent STD, age, type of relationship and sexual self-determination) contributed significantly to the best discriminating function. The discriminating function analysis resulted in correct classification of 83.1% of the respondents into their corresponding groups. Conclusion: Condoms are a main means of STDs prevention. Risk-reduction interventions that enhance communication skills and intrinsic motivation will be effective in increasing condom use to prevent STDs among sex workers.

• Journal of Korean Academy of Nursing Administration
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• v.13 no.3
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• pp.321-334
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• 2007

Purpose: The objectives of this study were to understand and compare perception and experience between clinical staffs(nurses and pharmacists) and Quality Improvement managers. Method: A qualitative study was conducted with 14 clinical staffs and QI managers who are working at tertiary hospitals in Korea. Interviews were recorded and transcribed for systematic analyses of qualitative data. Results: Most critically, while QI managers acknowledged that establishment of the patient safety culture and reduction of medical errors are urgent tasks for QI effort, clinical staffs don't seem to share such perceptions. All participants agree that staff shortage and no compliance to safety procedures were major reasons for medical error occurrences. Many suggested that an organizational culture where errors were perceived as a systematic problems rather than individual failures or carelessness should be formed to promote voluntary reporting of medical errors. Conclusion: A more systematic effort and attention at the hospital leadership and public policy level should be promoted to constitute societal consensus on the urgence of promoting patient safety culture and more specific approaches to tackle the patient safety problems.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.11
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• pp.5866-5871
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• 2013

DMSMS(Diminishing Manufacturing Sources and Material Shortage) of weapon systems is caused by required increase in system life cycle and reduction of military electronic parts market share. This problem causes serious problems about Combat readiness and Life-cycle cost. In this paper, we review the method for managing the DMSMS and then suggest effective alternatives to reduce the risk of DMSMS for weapon systems, such as systematic DMSMS management system and quantitative design refresh planning considering the DMSMS.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.24 no.11
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• pp.813-822
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• 2012

In this study, the multizone simulation for biosafety of BSL3 lab. and energy simulation are carried out simultaneously by using linked model of CONTAM and TRNSYS. In BSL3 lab., annual energy consumption is approximately five to ten times more than the magnitude of the office building. This is because required air change rate is extremely large and it is difficult to maintain room pressure difference efficiently. To maintain pressure difference between laboratory rooms through sealing condition of doors and proper airflow control is significant. In this study, to predict indoor environment of the BSL3 lab.(Influenza A research lab.), the multizone simulation for four kinds of biohazard scenario is also performed as part of risk assessment. Multizone and energy simulation results by using linked model show that these approaches are used as a tool for the energy efficient design and operation method for the safer BSL3 lab. facilities.

• Korean Journal of Occupational Health Nursing
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• v.19 no.1
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• pp.78-87
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• 2010

Purpose: The purpose of this study was to identify the effects of occupational health service(OHS) for the aged workers in small workplace. Method: A single group of pretest-posttest design was used. 608 aged workers of 253 small workplace who had one out of 4 risk factors were randomly selected. The OHS consisted of education, medical checkup, and counseling. Also information was provided by a visiting nurse 4-5 times every 4-5 weeks from March to November, 2009. The data were collected by interview, self report, and monitored by a nurse. Results: The OHS led to significant reduction of the mean systolic and diastolic blood pressures of 6.46mmHg and 5.22mmHg, each respectively. The mean total cholesterol, glucose, and BMI were also reduced significantly by 6.35mg/dL, 5.91mg/dL, and 0.31kg/$m^2$. And stages of health behavioral change were moved from 1,2,3 stages to 4,5 stages significantly. Conclusion: The OHS showed an effective intervention to improve the aged workers' health in the small workplaces. Therefore, The OHS by visiting a nurse can be a good strategy to extend to small & medium-sized companies having no in-site health manager.