• 대한기계학회논문집A
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• 제34권8호
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• pp.1097-1103
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• 2010

사출성형에서 사출압력은 제품의 특성을 결정하는 주요인자이므로 성형품의 품질 향상을 위해 사출압력은 최소화 되어야 한다. 또한 휨 변형과 웰드라인은 사출성형에서의 대표적인 불량요인으로 사출성형품의 품질 향상을 위해 방지되어야 한다. 본 논문에서는 사출성형품의 품질 향상을 위해 설계 절차를 2 단계로 나눈다. 첫 번째 설계에서는 공정조건을 제어하여 사출압력과 휨 변형을 최소화 하기 위해 직교배열표를 이용한 전산실험을 수행하고 이를 이용하여 근사모델을 생성한 후 최적설계를 수행한다. 두 번째 설계에서는 유동경로 개선을 통한 웰드라인의 발생을 방지하기 위해 해석모델의 두께를 변경하고 웰드라인 발생 유무를 평가한다. 이러한 설계절차를 통해 사출압력과 휨 변형을 최소화하면서 웰드라인을 방지하여 본 논문에서 제안한 설계방법의 유효성을 보이고자 한다.

• 한국콘텐츠학회논문지
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• 제16권3호
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• pp.575-585
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• 2016

본 연구는 항공사의 서비스과정 중 발생하는 대기를 항공기 탑승 전, 후로 나누어 물리적 환경과 인적 환경이 지각된 대기시간 및 항공사의 서비스품질에 미치는 영향에 대해 다룬다. 여러 항공서비스를 이용한 승객을 대상으로 300부를 배포한 뒤 유의한 총 231개의 설문지를 통해 분석 한 결과 서비스 과정 중의 대기 환경은 지각된 대기시간과 서비스품질에 유의한 영향을 미치며, 특히, 항공기 탑승 전(기내 서비스 전)에는 물리적 환경이, 항공기 탑승 후(기내 서비스 중)에는 인적환경이 더 영향을 미친다는 결과가 도출 되었다. 조절변수로 설정 한 수용가능성의 경우 항공서비스 특성상 대기나 예상이 가능함을 사전 인지하고 있어 조절효과가 나타나지 않았으나 지각된 대기시간은 서비스 품질에 유의한 영향을 미친다는 결론에 도달했다. 본 연구 결과로부터 항공사의 대기관리 전략에 있어 실무적인 시사점을 도출할 수 있었다.

• 한국의료질향상학회지
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• 제22권2호
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• pp.43-73
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• 2016

Purpose: The aims of this study were to assess the presence of core patient safety practices in Korean hospitals and assess the differences in reporting and learning systems of patient safety, infrastructure, and safe practices by hospital characteristics. Methods: The authors developed a questionnaire including 39 items of patient safety staffing, health information system, reporting system, and event-specific prevention practices. The survey was conducted online or e-mail with 407 tertiary, general and specialty hospitals. Results: About 90% of hospitals answered the self-reporting system of patient safety related events is established. More than 90% of hospitals applied incidence monitoring or root cause analysis on healthcare-associated infection, in-facility pressure ulcers and falls, but only 60% did on surgery/procedure related events. More than 50% of the hospitals did not adopted present on admission (POA) indicators. One hundred (80.0%) hospitals had a department of patient safety and/or quality and only 52.8% of hospitals had a patient safety officer (PSO). While 82.4% of hospitals used electronic medical records (EMRs), only 53% of these hospitals adopted clinical decision support function. Infrastructure for patient safety except EMRs was well established in training, high-level and large hospitals. Most hospitals implemented prevention practices of adverse drug events, in-facility pressure ulcers and falls (94.4-100.0%). But prevention practices of surgery/procedure related events had relatively low adoption rate (59.2-92.8%). Majority of prevention practices for patient safety events were also implemented with a relatively modest increase in resources allocated. Conclusion: The hospital-based reporting and learning system, EMRs, and core evidence-based prevention practices were implemented well in high-level and large hospitals. But POA indicator and PSO were not adopted in more than half of surveyed hospitals and implementation of prevention practices for specific event had low. To support and monitor progress in hospital's patient safety effort, national-level safety practices set is needed.

• 한국치위생학회지
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• 제14권6호
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• pp.789-794
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• 2014

The increasing cross-border mobility of dental school or dental hygiene students, educators, practitioners, programs and providers takes challenges for existing national quality assurance and accreditation frameworks and bodies, as well as for the systems for recognizing foreign qualifications. The new dental hygiene accreditation system was introduced to encourage the improvement of dental hygiene programs, to ensure the quality of education and, most of all, to establish an internationally compatible system of evaluation and accreditation. The accreditation procedure takes 1 year to complete. The result of the accreditation is released after evaluation via self-study report, site visit, preliminary draft report, responses from the institution and the results from the conciliation and review committees. The result from the accreditation procedure is either 'accreditation' or 'no accreditation'. Accredited schools receive one of several statuses following the evaluation. These are next general review, interim report and interim visit or suspension. Dental healthcare quality is not improved instantaneously, but instead gradually through continuous communication within the dental field. For this accreditation system to be successful, the following are essential: the accreditation agency should adopt hygiene education accreditation; it needs to become financially independent and managed efficiently; the autonomy and regulations surrounding the system need to be balanced; the professionalism of the system is ensured; and the dental field which includes not only dental program, but also hygiene program, needs to play an active role in the operation of the system.

• 한국의학물리학회지:의학물리
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• 제26권3호
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• pp.185-191
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• 2015

방사선치료는 수술, 항암치료와 함께 암의 3대 치료방법으로 많은 암환자들이 방사선치료를 받게 된다. 방사선은 눈에 보이지 않아 방사선 치료기계에서 나가는 방사선의 질과 양을 확인하기 쉽지 않고 산란되는 특성 때문에 다른 장기에 2차암이 유도할 수 있고 최근 치료기술의 발달로 치료 방사선에 대한 보다 정밀한 검증이 필요하게 되었다. 따라서 방사선 치료기기에 대한 품질관리를 철저히 해야만 한다. 국제원자력기구, 미국의학물리학회 등 해외에서는 보고서들을 제시하여 각 지역적인 차원에서 방사선 치료기기의 품질관리에 대한 권고를 제시한다. 하지만 국내는 외국에 비해 규모가 작아 각 병원에서 국외의 권고 중 일부를 선택적으로 사용한다. 국내 병원을 대상으로만 한 방사선치료의 품질관리 권고가 존재하지 않지만 국외의 권고들이 갱신되고 있으며 향후 국내 품질관리 권고를 제작하기 위해 국내 품질관리의 현황 역시 조사 및 갱신 될 필요성이 있으므로 본 연구에서는 방사선치료기에 대한 품질관리 설문지를 제작하여 국내 품질관리 경향에 대한 조사를 실시하였다. 초본으로 제작된 설문지를 국내 5개 기관의 의학물리학자에게 배포하여 설문지의 부족한 점을 파악하고 보충하여 최종 설문지를 제작한 후 이를 전국 72개 병원의 방사선 종양학과에 배포하여 조사를 실시하였다. 72개 병원 중 37개 병원에서 요청에 응답해주었으며 이들 중 97.3%의 병원이 선형가속기를 보유하고 있으며 40.54%, 18.92%, 24.32%의 병원이 각각 근접치료장치, 토모치료장치, 방사선수술장치를 보유하고 있는 것으로 나타났다. 이 밖에 품질관리 인력 및 장치, 국내의 환자 품질관리 현황, 각 치료기별 품질관리 현황에 대한 설문이 실시되었으며 이 결과는 향후 표준 품질관리 절차서가 제작될 경우 사용되기에 좋은 자료가 될 것이다.

• Agricultural and Biosystems Engineering
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• 제7권1호
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• pp.8-12
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• 2006

This study was conducted to develop a real-time internal quality evaluation technique for Korean red ginseng using NIR spectroscopy while they were moving to be graded. Internal qualities of Korean red ginseng were defined by color, amount of white core and cavity in the red ginseng. To evaluate the internal quality, PLS (Partial Least Square) model was developed. Spectrum saturation can be occurred when most red ginseng has a sound internal quality expressed by higher light transmittance ratio, but that could not found in the ginseng of internal white core under the same light situation. And, if spectrum saturation is obtained, it is hard to identify the exact information of internal quality. In order to evaluate of the internal quality regardless of having internal normal core or white core, an integral time controlled method was used to obtain traditional spectrum. This procedure was applied in real-time process when red ginseng was moving to be graded in the line. Among the 450 samples including 223 internal normal ginsengs and 227 internal white core ginsengs, 315 ginsengs (70%) were used to develop a calibration model and 135 ginsengs were spent to validate the model. The result of quality evaluation by the model was very good showing SEP and bias were 0.3573 and 0.0310, respectively, and the accuracy was 95.6%.

• 한국CDE학회논문집
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• 제13권3호
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• pp.235-242
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• 2008

This paper proposes a method for improving the process plan quality by use of dimensional tolerances. Dimensioning and tolerancing plays a key role in manufacturing process plan because the final part must ensure conformance with the dimensions and tolerances in its drawing. As a first step for the improvement of process plan quality, two resultant tolerances in design and process plan should be compared each other, and so a tolerance chart is used for acquisition and comparison of the two tolerances. In addition to two kinds of design and manufacturing tolerances, operational sequences or paths for the resultant dimension and tolerance are additionally recognized for measuring the quality of process plan quantitatively. Rooted tree is applied to find the related paths for the manufacturing resultant tolerances. A quality coefficient is defined by the components of two tolerances and their relations, the paths related to manufacturing resultant tolerances and the difficulty of an operation. In order to improve the quality of manufacturing process plan, the paths that two kinds of tolerances are the same or different in the rooted tree are recognized respectively and a method for tolerance rearrangement is developed. A procedure for improving the quality is suggested by combining the coefficient and the tolerance rearrangement method. A case study is applied to illustrate the efficiency of improvement method.

• 보건의료산업학회지
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• 제7권2호
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• pp.53-67
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• 2013

This study aims to analyze the effect of quality of health care on perceived value, patient satisfaction and revisit intention. Especially, it was focused on outdoor environment, admission procedure, hospital image, service quality of physicians that patients perceived. For inpatients, hospital image and service quality of medical technicians have an effect on perceived value. Service quality of physicians has an effect on the patient satisfaction. For outpatients, hospital image and service quality of physicians and medical technicians have an effect on perceived value. Outdoor environment, hospital image, service quality of physicians and medical technicians, and perceived value have an effect on patient satisfaction. Perceived value and patient satisfaction have an effect on revisit intention. They should evaluate customer satisfaction on their services and analyze various factors that affect on it to improve specialty hospitals.

• 한국항해항만학회지
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• 제43권6호
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• pp.353-360
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• 2019

Technology-driven development of a new system makes it difficult for users and stakeholders to identify or intervene in the development process, resulting in systems with unnecessary functions and poor quality services. Applying the software architecture design process to the initial design of the navigation system platform of autonomous ships enables the development of a system that reflects the required functions and service quality of the stakeholders. The design, which includes all of the subsystems that make up an autonomous ship platform, is close to an enterprise architecture. Thus, we strived to design a navigation system platform suitable for the design range of the software architecture. This study analyzed the definition of functional requirements, and quality attributes by applying the software architecture design procedure. This study was conducted to identify the characteristics of the navigation system and platform needs, and the stakeholders were identified. To derive the functional requirements and constraints of the platform, a quality attributes workshop was held engaging stakeholders, and the results of the analysis of functional requirements and quality attributes were listed. Based on the results of this study, the architect can establish the evidence and technical solutions that are integral for the architecture development, and will facilitate the creation of quality attribute scenarios.

• International Journal of Automotive Technology
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• 제7권1호
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• pp.43-49
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• 2006

In this paper, an index for the evaluation of a vehicle intake booming noise and intake sound quality were developed through a correlation analysis and a multiple factor regression analysis of objective measurement and subjective evaluation data. At first, an intake orifice noise was measured at the wide-open throttle test condition. And then, an acoustic transfer function between intake orifice noise and interior noise at the steady state condition was estimated. Simultaneously, subjective evaluation was carried out with a 10-scale score by 8 intake noise and vibration expert evaluators. Next, the correlation analysis between the psychoacoustic parameters derived from the measured data and the subjective evaluation was performed. The most critical factor was determined and the corresponding index for intake booming noise and sound quality are obtained from the multiple factor regression method. And, the optimal design of intake system was studied using the booming noise and the sound quality evaluation index for expectation performance of intake system. Conclusively, the optimal designing parameters of intake system from noise level and sound quality whose point of view were extracted by adapting comparative weighting between the booming noise and sound quality evaluation index, which optimized the process. These work could be represented guideline to system engineers, designers and test engineers about optimization procedure of system performance by considering both of noise level and sound quality.