• 한국군사과학기술학회지
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• 제11권3호
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• pp.99-105
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• 2008

The analysis of LOS(Line-Of-Sight) is defined as an "unobstructed view between two points". The LOS results may be influenced by terrain source, algorithm/interpolation method, etc. In the area denies any access and flight over, LOS results would be doubtful because of low precision of terrain data therefore have limitations of referring to many military applications. Using LIDAR data, LOS Analysis was performed by changing DTED resolution(1$\sim$30m) and LOS distance(50$\sim$2000m). The results of experiment shows that LOS analysis for small area, such as DMZ surveillance, were heavily influenced by DTED resolution.

• 대한교통학회지
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• 제30권3호
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• pp.7-15
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• 2012

보행시설의 보행 LOS 산정시 한국도로용량편람의 방법론을 주로 사용하고 있는데, 지나치게 양호한 결과가 도출된다는 문제점이 지속적으로 지적되어 왔다. 이에 본 연구의 목적은 현재 널리 이용되고 있는 한국도로용량편람의 보행 LOS 분석방법에 대한 문제점을 파악하고, 서울시 사례를 이용하여, 다양한 보행시설 중 보도의 보행 LOS 분석방법에 대한 개선방안을 제시하는 것이다. 한국도로용량편람의 분석방법에 의해 서울시 보도의 보행 LOS를 진단한 결과, 전체 대상지점의 90%이상이 LOS A로 판정되어 지나치게 양호한 결과가 도출되었는데, 이의 개선방안으로 유효보도폭의 절대적 값을 고려하는 방안을 제시하였다. 그 결과 LOS C 및 LOS D에서 많은 변화가 나타나는 것을 알 수 있었다. 지금까지 보도를 대상으로 한 보행 LOS 진단 연구가 한정된 지역에 국한되어 진행되었다면 본 연구는 서울시 전역을 대상으로 하여 보도의 보행 LOS를 진단했다는 면에서도 의의가 있다고 할 수 있다.

• 한국병원경영학회지
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• 제19권4호
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• pp.21-33
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• 2014

This study was conducted to propose an insight into the appropriateness of hospital length of stay(LOS) by developing a severity-adjusted LOS model for patients with pneumonia, organism unspecified. The pneumonia risk-adjustment model developed in this paper is based upon the 2006-2010 the Korean National Hospital Discharge in-depth Injury Survey. Decision tree analysis revealed that age, admission type, insurance type, and the presence of additional disorders(pleural effusion, respiratory failure, sepsis, congestive heart failure etc.) were major factors affecting the severity-adjusted model using the Clinical Classifications Software(CCS). Also there was a difference in LOS among the regional hospitals, especially the hospital LOS has not been efficiently managed in Gyeongsangbuk-do, Jeollanam-do, Jeollabuk-do, Daejeon, and Busan. To appropriately manage hospital LOS, reliable statistical information about severity-adjusted LOS should be generated on a national level to make sure that hospitals voluntarily reduce excessive LOS and manage main causes of delayed discharge.

• 대한교통학회지
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• 제33권1호
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• pp.29-39
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• 2015

현재 보행자도로의 LOS분석 방법은 한국도로용량편람(2013)의 보행자시설편에서 제공하고 있다. 그러나 용량편람에서 제시하는 보행자도로의 분석방법을 적용하여 LOS를 산출할 경우, 분석지점의 대부분이 A수준으로 산출되어 현실적인 보행자도로의 서비스 수준을 반영하지 못하고 있는 실정이다. 이에 본 연구는, 2009년 조사된 '서울시 유동인구조사' 자료를 바탕으로 현재 도로용량편람에서 제시하는 보행자도로의 MOE를 적용하여 LOS기준의 적정성과 문제점을 파악하고, 보다 개선되어진 LOS기준을 제시하고자 하였다. 이의 개선방안으로 본 연구에서는 표준인체치수의 최신화, 보행점유공간의 여유폭 고려, Fruin과 Hall의 연구에서 제시하는 LOS의 정성적인 정의를 활용하여 새로운 기준을 제시하였다. 새로운 기준의 적용결과 종전의 보행자도로 LOS판단 기준보다 합리적인 결과를 보였으며, 본 연구 결과를 바탕으로 추후 보행자도로에 관한 현실적이고 다양한 계획 설계 시공이 가능할 것으로 판단된다.

• 한국군사과학기술학회지
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• 제13권4호
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• pp.642-649
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• 2010

LOS analysis is used for optimal deployment of mid-range guided weapon system or system engagement effectiveness simulation. Comparing to real-world, LOS analysis includes error sources such as coarse terrain data resolution, refraction of radio waves, and several ideal assumptions. In this research, exact LOS algorithm under assumption of constant earth curvature and error analysis of that is investigated. It proved that LOS algorithm under assumption of constant earth curvature has negligible error in mid-range guidance weapon system's scope.

• 한국도로학회논문집
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• 제17권2호
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• pp.123-134
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• 2015

PURPOSES : The key point of a multimodal LOS (level-of-service) evaluation system is that all of the modes are mutually associated to determine each mode's LOS. For example, the LOS of the bicycle mode is measured based on not only bicycle volumes, but also automobile volumes. However, the Korea Highway Capacity Manual (KHCM) still focuses on the automobile mode in evaluating the LOS of the roads. Additionally, the KHCM's LOS of the other modes, except for the automobile, is not consistent with actual road conditions. The KHCM, therefore, needs to develop and introduce a multimodal LOS system in order to evaluate the service conditions more accurately. METHODS: As a preliminary step to the introduction of multimodal LOS research, in this study the current problem of the KHCM's LOS system through a close review and comparison with other HCMs (highway capacity manuals) was identified. Secondly, a field survey and investigation of the urban streets to apply the HCM's multimodal LOS system was conducted. Finally, a comparison analysis of the results of the HCM and KHCM LOS was performed. RESULTS: In the study, it was found that the results of the LOS for the automobile mode did not show a significant difference between the HCM and KHCM. However, the LOS of the bicycle and pedestrian mode tended to be worse in the multimodal LOS system, which results from considering the effects of the automobile mode. Moreover, it was found that many cases have the potential to improve the overall LOS conditions, while reducing the automobile capacity. CONCLUSIONS: With the introduction of the multimodal LOS system, road diet and complete streets can be easily applied to ans actual road improvement project. Ultimately, the multimodal LOS system should be introduced into the KHCM, which can then be applied to traffic impact studies and other road improvement projects for more accurate evaluations.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2014년도 춘계 종합학술대회 논문집
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• pp.25-26
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• 2014

• 한국직업건강간호학회지
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• 제9권1호
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• pp.18-29
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• 2000

Back injury is frequent in industry workers and is a common cause of productivity loss. It has been reported that the insured of industrial accident insurance tend to stay in hospital longer than that of other types of insurance. The purpose of this study was to identify factors affecting the length of hospital stay for the treatment of back injury in the workers under industrial accident insurance. The results of this study help insurers develop reasonable industrial accident insurance policy for back injury claims and prevention strategies of work-related back injury. A total of 2,949 patients whose industrial accident insurance claim has been approved for the treatment of work-related back injury from January to December 1999 were included in this study. Relationship between the length of hospital stay and characteristics of patient, work place, back injury, and hospital were assessed using ANOVA, t-test, simple linear regression and multiple resgression. The major findings of this study are as follows : 1. The average length of hospital stay(LOS) was 91.82 days, respectively. 2. Characteristics of Patient LOS of male patients was longer than that of female patients, there was positive correlation between age and LOS and between average wage and LOS. Working period was negatively correlated with LOS. Distance from resident to hospital was positively correlated with LOS and LOS was significantly different dependign on type of duty. 3. Characteristics of Work Place LOS was significantly different depending on types of industry and geographical region of work place. Size of work place was positively correlated with LOS. 4. Characteristics of Back Injury Occupational back pain required shorter LOS compared with back injury due to electric shock. Number of concomitant illnesses and severity of disability were positively correlated with LOS. 5. Characteristics of Hospital Patients treated in community hospitals required significantly longer LOS. Treatment in hospitals with rehabilitation program required decreased LOS. This was more prominent as number of physicians specialized in rehabilitation. 6. Multiple regression analysis revealed that distance form resident to hospital, geographical region of work place, size of work place, number of concomitant illnesses, severity of disability, and type of hospital were factors affecting LOS.

• 대한공간정보학회지
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• 제18권2호
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• pp.55-61
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• 2010

본 연구는 지상라이다로부터 획득한 3차원 점 데이터를 이용하여 구축된 공간자료를 격자(gridded) 및 비격자(un-gridded)로 구분하여 모델링을 실시하였고, 이러한 모델링 결과를 이용하여 가시선 분석 실험을 실시하였다. 두 모델의 형태에 따른 가시선 분석 결과를 비교하기 위하여 본 연구에서는 실험지역의 가시선 최대 도달거리를 A지역 30m, B지역 40m, C지역 50m로 구분하였고, 가시선 분석 소요 시간과 가시되는 점의 개수를 측정하였다. 실험 결과를 살펴보면, 비격자모델의 경우, 격자모델에 비해 지역별로 A지역은 약 3.9배, B지역은 약 5.4배, C지역은 약 6.5배 정도 많은 시간이 가시선 분석에 소요되었으며, A지역은 약 0.97배, B지역은 약 0.93배, C지역은 약 0.94배 정도 적은 가시점 개수가 측정되었다. 가시선 분석 소요시간은 가시선의 최대도달거리가 증가함에 따라 격자모델과 비격자 모델의 차이가 증가함을 알 수 있고, 반면에 가시되는 점의 개수는 가시반경의 크기에 크게 영향을 받지 않았다.

• 보건행정학회지
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• 제30권1호
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• pp.82-91
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• 2020

Background: This study investigates the influence factors of medical service variations using medical charge and the length of stay (LOS) for urinary incontinence surgery and uterine polypectomy. Methods: The National Health Insurance claims data and Medical Resource Report by the Health Insurance Review & Assessment Service in 2016 were used. Frequency analysis, one-way analysis of variance, and Bonferroni post-hoc tests were executed for each surgery. A multilevel analysis was executed to assess the factors to the medical charge and LOS for each surgery in patient, doctor, and hospital level. Results: Fifty-two point eight percent of urinary incontinence surgery and 87.1% of uterine polypectomy were distributed in general and tertiary hospitals. Among three levels, the patient level variation was 61.5% or 77.2% in medical charge and 93.9% or 96.3% in LOS, respectively. The doctor level variation was 29.6% or 22.6% in medical charge and 0.6% or 0.0% in LOS, respectively. The institution level variation was 8.9% or 0.2% in medical charge and 5.5% or 3.7% in LOS, respectively. Number of other disease and organizational type were main factors that affected the charge and LOS for urinary incontinence surgery and uterine polypectomy. Conclusion: Medical service variations of the urinary incontinence surgery and uterine polypectomy were the largest for the patient level, followed by doctor level for the medical charge, and the institution level for the LOS.