• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.1540-1547
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• 2009

Steel frame factories were surveyed in this study in order to explore the possibility of shortening the construction time and save on construction cost through overlapping at the stages of design or construction. In the survey, construction professionals were interviewed in order to collect quantitative data. Hypotheses were then formulated, and the data was thereby analyzed using the simulation technique in order to analyze the effects of the concurrent engineering method on shorter construction time and cost saving. In addition, actual cases were analyzed to determine the overlapping rates of major processes in terms of shorter construction time and cost saving and to analyze the relationship between time and cost due to overlapping.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.440-448
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• 2009

Concurrent construction (or overlapping) is an alternative project delivery process to reduce time-tomarket such that the owner can get higher profits; the increased profits due to shortened project duration would exceed the loss of profits from the increased cost, if any. For more effective concurrent construction, a new conceptual framework for concurrent construction planning is suggested. With multiple work methods available in each activity, the performance of overlapping between two activities in terms of cost is affected by the compatibility between work methods selected and the benefit to the project owner is determined by internal rate of return (RoR). The impact of the compatibility between work methods and the conceptual framework are explained by a hypothetical case study.

• 한국응급구조학회지
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• 제3권1호
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• pp.20-32
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• 1999

The purpose of this retrospective research of 603 patients who were transferred to the emergency medical center of university hospital from 1 Jan, 1998 to 31 Jan, 1998 was making of basic data for emergency medical transfer system improvement countermeasure and the point at issue of overlapping reexamination ststus of patients transfered to emergency medical center of university hospital from 1,2 level hospital. The data analysis was done by SPSS, t-test, ANOVA, Pearson correlation. The results were as follows: 1. Male to female ratio was 1.7:1 and peak age group was patients over forties and under nine years of age(70.5%) 2. Traumatic patients were 17.8%, motor vehicle accident patients were 16.7% and Non-traumatic patients were 65.3%. Transferring hospital was divided into 2groups: primary hospital, secondary hospital. The majority was secondary hospital(73.3%). The result of symptom severity classification of patients transferred to 3rd emergency medical center was urgent patients 32.5%, emergency patients 33.58%, non-emergency patients 34.0% 3. Most highest score items amoung overlapping reexamination of patients transfered to emergency medical center of university hospital from 1,2 level hospital were CBC test, simple X-ray (0.93점), CBC test(0.97점), urin test(0.88점), chemistry test(0.94점), simple X-ray(0.98점), CT(0.42점), EKG(0.89점) amoung overlapping reexamination of motor vehicle accident patients were more higher reexamination score than traumatic patients and non-traumatic patients 4. CBC test(P<0.001), urin test(P<0.001), chemistry test(P<0.001), simple X-ray(P<0.001), CT(P<0.01), EKG(P<0.001) amoung overlapping reexamination of patients in 2 level hospital were more higher reexamination score than 1 level hospital patients 5. About symptom severity classification of patients transferred to 3rd emergency medical center, CBC test(P<0.001), urin test(P<0.001), chemistry test(P<0.001), simple X-ray(P<0.01), CT(P<0.001), EKG(P<0.001) amoung overlapping reexamination items in urgent patients were more higher reexamination score than other patients 6. Influencing variation for overlapping reexamination in hospital was CBC test(P<0.001), CT (P<0.001), MRI (P<0.05).

• 한국건설관리학회논문집
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• 제13권2호
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• pp.120-127
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• 2012

오늘날 대부분의 건설 사업들은 점차 프로젝트의 규모가 고층화, 대형화, 복잡화되어 가고 있다. 이에 국내 건설기업들은 전체적인 공사 흐름을 파악하고 공정의 연결 관계를 고려하는 등 체계적이고 효율적인 공정관리를 위해 여러 가지 관리기법 및 도구들을 개발하여 실무에 도입하고 있다. 그러나 기존의 공정관리 소프트웨어들은 대부분 ADM, PDM기법을 기반으로 하고 있기 때문에 실무 적용 시 많은 문제점들을 발생시키고 있다. 그 중 PDM기법은 선 후행 작업의 착수시점과 완료시점 간의 조합만으로 작업 간의 중복관계를 우회적으로 표현하기 때문에 매우 비효율적이다. 이러한 기존 CPM기법의 단점을 보완하기 위해 직접적으로 작업 간 양방향 다중 중복관계를 표현할 수 있는 새로운 CPM 공정관리기법인 BDM(Beeline Diagramming Method)기법이 제안되었다. 그러나 양방향 다중 중복관계를 표현하고 일정계산을 하게 되면 루프(Loop)현상이 발생하게 된다. 본 연구에서는 BDM기법의 일정계산 방법에 대해 연구하여 양방향 다중 중복관계에서 루프가 발생했을 때 일정계산을 원활하게 할 수 있는 방법에 대해 제안 및 검증을 하고자 한다.

• Journal of Advanced Marine Engineering and Technology
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• 제40권9호
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• pp.768-773
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• 2016

엔진 밸브 시트와 페이스는 엔진 성능에 영향을 미치므로 내마모성, 내열성 및 내식성이 요구된다. 이러한 특성을 갖는 표면층을 형성하기 위해 일반적으로 PTA 프로세스를 사용하고 있지만 넓은 열 영향부와 높은 모재 희석 등과 같은 문제가 발생한다. 이러한 단점을 개선한 레이저 클래딩은 희석률이 낮고 열 영향 및 열 변형을 최소화하므로 더욱 우수한 클래드 층을 형성할 수 있다. 하지만 레이저 빔의 특성상 넓은 면적을 클래딩 할 경우, 1 패스 클래드 층의 중첩이 불가피하다. 중첩률 기준을 빔 사이즈와 클래드 층 폭으로 나누어 멀티패스 클래드 층을 형성한 결과, 기준에 관계없이 중첩률이 증가할수록 클래드 층의 폭이 감소하고 높이가 증가하였다. 하지만 빔 사이즈 기준 중첩률 조건으로 형성된 멀티패스 클래드 층이 다른 기준보다 모재 희석이 감소하여 더욱 높은 경도 값을 나타내었다. 결론적으로, 중첩률 기준을 클래드 층 폭으로 할 경우, 클래드 층 형상에 영향을 주는 공정변수가 변할 때 마다 폭의 길이가 달라지기 때문에 빔 사이즈를 중심으로 중첩률을 정의하였다.

• 대한수학회보
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• 제32권2호
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• pp.163-170
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• 1995

Let G be a Lie group with Lie algebra L(G) and let $\Omega$ be a nonempty subset of L(G). If $\Omega$ is interpreted as the set of controls, then the set of elements attainable from the identity for the system $\Omega$ is a subsemigroup of G. A system $\Omega$ is called a non-overlapping control system if any element attainable for $\Omega$ is only attainable at one time.

• 한국국방경영분석학회지
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• 제35권1호
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• pp.21-32
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• 2009

In this study, the author uses a MATLAB simulation to develop and test a generalization of the traditional Random Search model which allows both the searcher and target to move and to be in different, but overlapping, areas. Also the best evasion speed for a randomly moving target against a Systematic Search is studied.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.136-141
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• 1991

An Overlapping Decomposed Filter(ODF) accomplishing an initial alignment of an INS is proposed in this paper. The proposed filter improves the observable condition and reduces the filtering computation time. Its good performance has been verified by simulation. Completely observable and controllable conditions of INS error model derived from psi-angle approach are introduced under varying sensor characteristics vary. The east components of gyro and accelerometer have to be the first order markov process and the rest of them are the characteristics of the random walk or first order markov process.

• Journal of the Korean Statistical Society
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• 제33권1호
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• pp.35-58
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• 2004

For fixed positive integers and $\textit{k}\;(n\;{\geq}\;{\textit{k}}\;+\;2)$, the exact probability distributions of non-overlapping and overlapping patterns of two failures separated by (i) exactly $textsc{k}$ successes, (ii) at least $\textit{k}$ successes and (iii) at most $\textit{k}$ successes have been obtained for Bernoulli independent and Markov dependent trials by using combinatorial technique. The waiting time distributions for the first occurrence and the $r^{th}$ (r > 1) occurrence of the patterns have also been obtained.

• Journal of applied mathematics & informatics
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• 제16권1_2호
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• pp.461-468
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• 2004

Let W(z) be a power series with operator coefficients such that multiplication by W(z) is contractive in C(z). The overlapping space $L(\varphi)$ of H(W) in C(z) is a Herglotz space with Herglotz function $\varphi(z)$ which satisfies $\varphi(z)+\varphi^＊(z^{-1})=2[1-W^{*}(z^{-1})W(z)]$. The identity ${}_{L(\varphi)}={-}_{H(W)}$ holds for every f(z) in $L(\varphi)$ and for every vector c.