• Title/Summary/Keyword: Operation factors

Search Result 3,652, Processing Time 0.037 seconds

A Study on the Methodology for Analysing Human Factors in Ship Operating System (선박운항시스템에 있어서 인적요소(Human Factors)의 조사방법론에 관한 고찰)

  • 황병호;이종인
    • Journal of the Korean Institute of Navigation
    • /
    • v.24 no.1
    • /
    • pp.23-34
    • /
    • 2000
  • The human error or error involved with human is still the major portion of the causes of marine casualties and attracting a great concern in ship operation. However, there are not so many researches conducted to investigate or develop methodologies for analyzing such causes of human error in maritime industry, which may be caused by the variety of factors affecting the performance of ship operation and the characteristics of human being. This paper aims to study the methodologies used in investigating human factors or errors in maritime field through the investigation of researches performed so far. The methodology for human factors can be usually classified into one of three types; descriptive studies, experimental research and evaluation research. Also there are many different kinds of applied researches for some specific subjects. Prior to the investigation of the root cause of marine accident related with human error, clear concept of the human factors and systematic taxonomy shall be established. Moreover, it is very important considerations in case of casualty inspection on human factors that the inspector on the accident shall have adequate knowledges, understandings on the concept of human factors including the way of research more than those of methodologies and techniques.

  • PDF

A Study of Perceived Discomfort of The Patients Under Local Anesthesia - Centering Around the Development of Measures - (국소마취 수술환자의 불편감에 관한 연구 - 도구개발을 중심으로 -)

  • Lee, Gyeong Sug;Kim, Mi Ja;Park, Sun Mi;Paek, Sun Young;Lee, Yang Sug;Bae, Sang Do;Choi, Jung Hoon
    • Quality Improvement in Health Care
    • /
    • v.7 no.1
    • /
    • pp.6-17
    • /
    • 2000
  • Background : This study was attempted to provide a basic information necessary for the development of measures evaluating perceived discomfort of the patients under local anesthesia and the developments of nursing intervention and nursing standard. Method : The study subjects were a convenience sample of 100 surgical patients under local anesthesia. The researcher visited the patients directly and explained the purpose of the study to them. Then they were asked to fill out questionnaires which were developed and structured by the researcher, under their prior permission. Out patient's data were collected at recovery room after operation. Results : Factor analysis on measures evaluating the patients under local anesthesia showed that the measures consisted of eight factors including "explanation", "humane treatment", "motion limitation", "pain", "no togetherness", "waiting", "the environment of operating room", and "unkindness". When analyzing each of the factors regarding their degree of contribution to perceived discomfort, it was found that "waiting" was highest in terms of the degree. According to general chara-cteristics of the sampled patients, the factor of "explanation" contributed to perceived discomfort more in male patients than female ones. Regarding parts of medical examination, the patients of otorhinolaryngology felt perceived discomfort most because of the factor of "pain". Conclusion : To relieve perceived discomfort the patients under local anesthesia require providing individually systematized nursing services which can reduce perceived discomfort according to each of the factors. In doing so, an unlimited attention and much effort should be given to realize CQI reaching the dimension of increase in comfort as well as decrease perceived discomfort.

  • PDF

A New Interpretation of Ptosis-like Eyes through the Results of Small-Incision Double-Eyelid Operation (부분절개 쌍꺼풀성형술의 결과로 유추한 가성 안검하수의 새로운 해석)

  • Park, Sung Gyu;Lee, Seung Kook;Baek, Rong Min
    • Archives of Plastic Surgery
    • /
    • v.33 no.4
    • /
    • pp.449-453
    • /
    • 2006
  • Purpose: Perceiving the experience that $MRD_1$ is increased after small-incision double-eyelid operation, it has been statistically verified the improvement of $MRD_1$ retrospectively. Therefore, we suggest new interpretation for Korean-specific small eye and more definite classification for ptosis. Methods: In operation, we made 3 small incisions according to the line designed on upper eyelid and removed some soft tissues including connective tissues. Then, figure-of-8 continuous buried ligation was performed through the incision windows. This study is a retrospective study, measures $MRD_1$ changes and excursion distance change of eyelid margine and eyebrow using pre-and post-operative photos of 14 patients. Results: Postoperative photos were taken on the 4th day and all of 14 patients had an improvement in $MRD_1$ statistically. The excursion distance of upper eyelid was improved in half of patients, though not in the range of statistical verification. It was statistically confirmed that the movement of eyebrow was reduced after operation. Conclusion: It is thought that $MRD_1$ improvement without any operation on levator complex means that soft tissue including connective tissue eliminated in operation restricts the movement of upper eyelid. It is defined such factors as burden factors and such phenomenon as burdened eyelid. It is thougt that Korean's small eye is mainly burdened eyelid and cosmetic improvement may be obtaind even by removing such burden factors.

A Study on the Estimating of the Dump Truck's Travel Speed Based on Analysis of Factors Affecting Earthmoving Operation (운반작업의 영향요소분석을 통한 덤프트럭의 운반속도 산정방법에 관한 연구)

  • Park, Hyeon-Yong;Tae, Yong-Ho;Woo, Sung-Kwon
    • Korean Journal of Construction Engineering and Management
    • /
    • v.8 no.3
    • /
    • pp.97-105
    • /
    • 2007
  • In many construction projects, such as dams, highways, airports, buildings, industrial plants, and sewerage and drainage systems earthmoving operation is defined the movements of a certain quantity of earth to alter the surface configuration or conditions so that projects requirement can be met. Accurate calculation of travel time is essential for determining productivity of earthmoving operations, and for ultimately selecting the most cost-effective fleet configuration for executing the work. Also transportation work that utilizes dump truck consists average So in the whole expenses earthmoving operation, and is an important cost factor for cost management. Therefore this study proposes a methodology for optimum transfer speen based on the analysis of factors affecting earthmoving operation in different road types by collecting the sources of dump truck running speeds and considering the main factors affecting the earthmoving operation.

A New Method to Process Transmission Losses in Power Market Operation (전력시장에 적용할 송전손실 처리방법에 관한 연구)

  • Han Se Young;Ro Kyoung Soo
    • Proceedings of the KIEE Conference
    • /
    • summer
    • /
    • pp.70-72
    • /
    • 2004
  • The paper proposes a new method to process transmission losses in power market operation using loss distribution factors and then compares the proposed method with the one using marginal loss factors. Effectiveness of the algorism is verified by a computer simulation.

  • PDF

A Study on the Evaluation of Improvement Factors of Tug Services in Korea (우리나라 예선 서비스 개선요인 평가에 관한 연구)

  • Yeou, Young-Hun;Ryoo, Dong-Keun
    • Journal of Navigation and Port Research
    • /
    • v.37 no.5
    • /
    • pp.559-565
    • /
    • 2013
  • The purpose of this study is to prioritize improvement factors of the tug services in terms of the structural problem, operating system and the present condition of the tug at each port in Korea. It was identified that the tug operating system needs to be mostly improved among the improvement factors of the tug services in Korea. In addition, free contract and rotating system were found to be important factors which need to be improved comparing to other factors such as service quality, tug rules, operating practices of council for tug operation and customer factor. The service attitude of the tug companies was regarded as an important element. And the tug entry system appeared to be an important item. Finally, laws relating to tug business needs to be revised which allow new tug companies enter into the market. As the result of AHP analysis for tug systems and service improvement factors, some fundamental changes of tug operation systems are urgently needed.

Correlation of Marine Exploration-Survey Vessel Operation Factors and Grid-Type Operation Method through ES Model Analysis (환경스트레스 모델을 통한 해양탐사·조사선의 격자형 운항방식과 운항요인 상관관계에 관한 연구)

  • Park, Hyungoo;Park, Young-soo;Kim, Dae-won
    • Journal of the Korean Society of Marine Environment & Safety
    • /
    • v.26 no.6
    • /
    • pp.634-643
    • /
    • 2020
  • Because of the continuous increase in the demand for and importance of marine space, marine exploration and survey activities are being actively conducted in Korea actively. Because the marine survey vessels used for these activities have special operational patterns depending on the purpose and probe vessels, research on maritime traffic risk is required. In this study, an attempt was made to determine the correlation of each factor with the effect of marine exploration and survey vessel operation on maritime traffic. The status of ocean exploration and survey vessels in operation in Korea was identified, as well as the special operational conditions of some of the ocean physical probes. Generally, the number of exploration and survey vessels involved per hour, total vessel length(including exploration equipment), operation, interval distance of exploration as per plan, and marine traffic conditions(traffic volume and speed) can be classified as operating factors. To compare the results of the environmental stress, a maritime traffic flow simulation based on the "ES" Model was performed with each of the identified operating factors as independent variables. The results of the analysis confirmed that the environmental stress significantly changed in the order of traffic volume, ship length and speed. In addition, it was confirmed that the environmental stress is reduced when the operation course is set at an angle with the nearby maritime traffic flow. Accordingly, it can help reduce the operator's burden if the survey vessel operator understands nearby maritime traffic conditions and reflects them in the operation method when setting the operation plan.

Job Hazard Analyses for Musculoskeletal Disorder Risk Factors in Pressing Operations of Dry-cleaning Establishments

  • Park, Jung-Keun
    • Safety and Health at Work
    • /
    • v.7 no.4
    • /
    • pp.389-393
    • /
    • 2016
  • Job hazard analyses were conducted to assess exposure to musculoskeletal disorder (MSD) risk factors in seven workers of three dry-cleaning establishments. In accordance with the Washington State Ergonomics Rule, the analyses were performed in two separate steps: (1) observation and checklist approaches were made to identify a "caution zone job" in the seven workers' pressing operations across the three shops; and (2) detailed posture and motion analyses were undertaken to determine a "MSD hazard" in one worker's operation using a video technique. One "caution zone job" was identified and it was the pressing operation job in which five physical risk factors were found in the pressing operations. The detailed analyses confirmed that one "MSD hazard", i.e., awkward posture in shoulders, was prevalent in the pressing operations of the three dry-cleaning facilities. It would be desirable to reduce MSD risk factors including awkward shoulder posture in the dry-cleaning industry.

Risk Factors for Surgical Site Infections According to Electronic Medical Records Data (전자의무기록(EMR) 자료를 활용한 수술부위감염 관련요인)

  • Kim, Young Hee;Yom, Young-Hee
    • Journal of Korean Academy of Fundamentals of Nursing
    • /
    • v.21 no.2
    • /
    • pp.151-161
    • /
    • 2014
  • Purpose: The purpose of this study was to identify the risk factors that influence surgical site infections after surgery. Methods: This study was a retrospective research utilizing Electronic Medical Records. Data collection targeted 4,510 adult patients who had 8 different kinds of surgery (gastric surgery, colon surgery, laparoscopic cholecystectomy, hip & knee replacement, hysterectomy, cesarean section, cardiac surgery) in 4 medical care departments, at one general hospital between January 2006 and December 2011. Multivariate logistic regression analyses were used to identify the risk factors affecting surgical site infections after surgery. Results: Risk factors for increased surgical site infection following surgery were confirmed to be age (OR=1.59, p<.001), BMI (Body Mass Index)(OR=1.25, p=.034), year of operation (OR=2.45, p<.001), length of operation (OR=3.06, p<.001), ASA (American Society of Anesthesiology) score (OR=1.36, p=.025), classification of antibiotic used (OR=2.77, p<.001), duration of the prophylactic antibiotics use (OR=1.85, p<.001), and interaction between classification of antibiotic used and duration of the prophylactic antibiotics use (OR=1.90, p=.016). Conclusions: Results suggest that risk factors affecting surgical site infections should be monitored before surgery. The results of this study should contribute to establishing effective infection management measures and implementing surveillance systems for patients who have actual risk factors.

Technical Analysis on Existing Ship's Economical Operation (운항선 중심의 선박 경제운항 관리의 기술적 분석)

  • Kang, Nam-seon;Kim, Yong-dae;Yoon, Hyeon-kyu;Byeon, Sang-su
    • Journal of Advanced Navigation Technology
    • /
    • v.20 no.6
    • /
    • pp.519-527
    • /
    • 2016
  • The present study is concept research on the operation cost management of shipping firms, especially considering technology for economical ship operation of existing ships in units of voyage. The factors that influence economical ship operation management were identified by analyzing the current status of the shipping industry, the development of economical ship operation technologies, technological requirements, and the cost factors of ship operation. Economical operation of existing ships, especially, the economical operation of the units of each voyage, may minimize fuel cost and port charges. This requires low-load streaming cruise control, ballast control, optimal trim, optimal routing, terminal work efficiency improvement, and ship energy management. Optimal routing and terminal work efficiency improvement manage the time saved. To determine the low-load streaming, cruise control, ballast control, optimal trim and ship energy management are meeting the recommendations.