• 제목/요약/키워드: (s,S)-inventory Control

검색결과 314건 처리시간 0.035초

통신프로토콜을 포함한 자동창고 운용소프트웨어 개발 (Development of operating software for AS/RS including communication protocol)

  • 손경준;정무영;이현용;송준엽
    • 산업공학
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    • 제8권1호
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    • pp.45-52
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    • 1995
  • Automated Storage and Retrieval System (AS/RS), which is an element of Computer Integrated Manufacturing (CIM), is a widely used material handling equipment with conveyors and Automatic Guided Vehicles (AGVs). Until now the evaluation of operational policies of AS/RS and control algorithms is done theoretically or by computer simulations. In this study, a real-time control and communication software for an AS/RS is developed for actually moving AS/RS miniature. A PC-based real-time operational program can control the AS/RS directly through the communication port. The operational system has additional functions such as storage/retrieval management, inventory management, statistics management, and protocol simulation. The communication protocol simulator of S/R machine can be used for the controller of an S/R machine.

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주문량 증가에 따른 할인 정책이 있는 다기간 재고 모형의 해법 연구 (A Study on a Multi-period Inventory Model with Quantity Discounts Based on the Previous Order)

  • 임성묵
    • 산업경영시스템학회지
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    • 제32권4호
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    • pp.53-62
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    • 2009
  • Lee[15] examined quantity discount contracts between a manufacturer and a retailer in a stochastic, two-period inventory model where quantity discounts are provided based on the previous order size. During the two periods, the retailer faces stochastic (truncated Poisson distributed) demands and he/she places orders to meet the demands. The manufacturer provides for the retailer a price discount for the second period order if its quantity exceeds the first period order quantity. In this paper we extend the above two-period model to a k-period one (where k < 2) and propose a stochastic nonlinear mixed binary integer program for it. In order to make the program tractable, the nonlinear term involving the sum of truncated Poisson cumulative probability function values over a certain range of demand is approximated by an i-interval piecewise linear function. With the value of i selected and fixed, the piecewise linear function is determined using an evolutionary algorithm where its fitness to the original nonlinear term is maximized. The resulting piecewise linear mixed binary integer program is then transformed to a mixed binary integer linear program. With the k-period model developed, we suggest a solution procedure of receding horizon control style to solve n-period (n < k) order decision problems. We implement Lee's two-period model and the proposed k-period model for the use in receding horizon control style to solve n-period order decision problems, and compare between the two models in terms of the pattern of order quantities and the total profits. Our computational study shows that the proposed model is superior to the two-period model with respect to the total profits, and that order quantities from the proposed model have higher fluctuations over periods.

한국판 문제행동 평가도구(Behavior Problems Inventory-01) 표준화 연구 (Validation Study of Behavior Problems Inventory-01 among Korean Children and Adolescents)

  • 최미지;김예니;반지정;황석현;김붕년;양영희
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
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    • 제28권4호
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    • pp.220-227
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    • 2017
  • Objectives: The purpose of this study was to examine the reliability and validity of the Korean version of the Behavior Problems Inventory (BPI-01) among children and adolescents aged between 3 and 18. Methods: The control group consisting of one hundred children and adolescents was recruited from schools and the patient group consisting of forty one children and adolescents with autism spectrum disorder were recruited from a hospital. We compared the measurements of both groups. To assess the concurrent validity of the BPI-01, we compared the problem behavior index of the Korean Scale of Independent Behavior-Revised (K-SIB-R) and, to assess the discriminant validity, we compared the Korean version of the Child Behavior Checklist (K-CBCL). The Cronbach's alpha of the BPI-01 was measured to assess its reliability. Correlation analyses between the BPI-01 and the other scale were carried out to examine the former's concurrent and discriminant validity. Results: The patient group showed a significantly higher score for all three subscales of the BPI than the control group. The Cronbach's alpha was 0.92 for the total severity score of the BPI and ranged between 0.67-0.89 for each subscale in the patient group. All subscales of the BPI-01's, i.e., self injurious behavior, stereotyped behavior and aggressive/destructive behavior, were significantly correlated with the corresponding subscales of the K-SIB-R. The BPI-01 generally did not demonstrate any significant correlation with emotional items such as anxiety/depression in the K-CBCL. Especially, the BPI-01's stereotyped behavior subscale showed little correlation with externalizing behaviors such as social problems and aggressive behaviors. Conclusion: This study found that the Korean version of BPI-01 is a reliable and valid behavior rating instrument for problem behavior in developmental disabilities among children and adolescents.

유치원 학부모 자원봉사자의 양육효능감과 교사로서 역할수행에 관한 연구 (A Study on Parenting Efficacy and Parenting as a Teacher of the Volunteer in the Kindergarten)

  • 이세나
    • 한국생활과학회지
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    • 제17권3호
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    • pp.377-387
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    • 2008
  • The study is to research their parenting efficacy and parenting practices of a parent teacher as a volunteer(PTV) in the kindergarten. The subjects were mothers (N=127) in Choongbuk Province who had had volunteer education as a teacher assistant. The data were collected by their completing a questionnaire about Parenting efficacy and a Parent As A Teacher inventory (PAAT). The results include as follows: firstly, in PTV's parenting efficacy, 'the type of educational institution children are attending' is an important variable. Secondly, 'mother's educational background', 'father's educational background', and 'the type of educational institution children attending' are important variables in volunteer parents' parenting practices. Besides, 'mother's educational background' and 'participation motivation in volunteer activity' are important variables in parenting practices of 'control/permission' and of 'teaching/learning', and in general parenting practices. Finally, 'parenting efficacy', 'mother's educational background', and 'the sex of children' are important variables in volunteer teachers' parenting practices.

Q-BOM(Quality-BOM) 기반의 품질보증 효율화 방안 연구 (A Study on the Improvement of Efficiency for Quality Assurance Based on Quality-Bill of Material)

  • 이창희;양경우;박두일;김상부
    • 품질경영학회지
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    • 제41권3호
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    • pp.457-463
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    • 2013
  • Purpose: For effective quality assurance activities, BOM-based quality assurance method is presented. This study introduces various BOM conversions such as Q-BOM, T-BOM, and S-BOM based on M-BOM structure. Methods: Product quality control via Q-BOM manages inspection/audit information, overall supply-chain of product, part requirements, and inventory status. T-BOM manages part traceability, and S-BOM enables statistical control over key process and parts at various hierarchy levels. Results: Quality plan template was developed based on the study results of BOM system including Q-BOM, T-BOM, and S-BOM. Conclusion: Through BOM(Q-BOM, T-BOM, and S-BOM) study and development of quality plan template, more systematic and comprehensive quality management plan is achieved.

청소년의 시험 불안에 영향을 미치는 가정 환경적 요인 (FAMILY ENVIRONMENTAL FACTORS AFFECTING TEST ANXIETY IN ADOLESCENT)

  • 성종호;손인기;이영식
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
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    • 제11권1호
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    • pp.16-26
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    • 2000
  • 연구목적:청소년의 시험불안에 영향을 미치는 개인 및 사회환경적 변인 연구의 후속 연구로서 시험 불안의 인지적요소, 감정적 요소와 가정환경 요소간의 상관 관계를 알아보고자 학생청소년들을 대상으로 본 연구를 실시하였다. 방 법:서울 시내 8개 남녀 중고등학교 총 880명을 대상으로 하였다. 시험불안의 정도를 측정하기 위해 Spielberger의 시험불안 목록(Test Anxiety Inventory)을 사용하였고, 가정환경적 요소를 측정하기 위해서는 Moos와 Moos의 가정환경척도(Family Environmental Scale)를 사용하였다. 기타 사항은 저자들이 작성한 설문지를 사용하였다. 결 과:1) 시험 불안의 총정 및 인지적 요소는 응집력 척도, 독립성 척도와는 부적 상관관계를 보였고, 시험불안의 총점 및 인지, 감정적 요소 모두는 성취 지향성 척도, 조절성 척도와는 정적인 상관관계를 보였다. 2) 시험 불안이 높은 군은 낮은 군에 비해 성취 지향성 척도, 조절성 척도는 높고 응집력 척도는 낮았다. 3) 시험불안과 밀접히 연관된 상기 4가지 척도 중 조절성 척도를 제외한 세가지 척도(성취 지향성, 독립성 응집력)는 부모의 학력, 경제력이 높을수록 높은점수를 보였다. 결 론:따라서 부모는 아이의 능력에 맞는 성취지향성 목표를 설정하여야 하며, 자녀에 대한 과도한 통제나 조절보다는 독립성을 고취시켜야하며, 가정내 구성원간의 갈등이 없는 응집력을 보여야 하겠다.

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집단물리치료가 어깨수술환자의 우울수준 및 회복능력에 미치는 영향 (The Impact of Group Physical Therapy Shoulder Surgery, the Patient's Level of Depression and the Ability to Heal)

  • 이동진;손기훈;조재석;김현수
    • 대한통합의학회지
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    • 제1권1호
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    • pp.97-107
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    • 2013
  • Purpose : The purpose of this study was conducted to patients undergoing shoulder surgery rotator cuff tear group physical therapy to improve the patient's level of depression and any impact on the shoulder's ability to heal should learn. Method : This research participated in 20 patients four weeks from June 11, 2012 June 8 il experiment was carried out. Experimental group conducted physical therapy(n=10) and control group(n=10) was not conducted Results : A comparative analysis of experimental group and the control group in the levels of depression (BDI) was not significantly different. A comparative analysis of experimental group and the control group in the VAS was not significantly different. ROM(flexion, extension, abduction, and internal rotation) was significantly increased in the experimental group, whereas external rotation significantly did not increased. Conclusion : ROM of external rotation between the experimental and control groups, except for the change showed a statistically significant, the above findings, the level of pain and depression, there were no statistically significant differences.

경련 질환 환아의 정신병리와 신경학적 요인과의 관계에 대한 연구 (THE STUDY ON RELATIONSHIP BETWEEN PSYCHOPATHOLOGY AND NEUROLOGICAL FACTORS IN CHRONIC EPILEPTIC CHILDREN)

  • 김붕년;조수철;황용승
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
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    • 제7권1호
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    • pp.92-109
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    • 1996
  • 본 연구에서는 정상 지능 범위의 만성 특발성 경련 질환으로 치료중인 40명의 환아군과, 나이, 성별, 학업 성적, 지능 지수를 일치시킨 30명의 대조군을 대상으로, 국내외를 통해 신뢰도 및 타당도가 확인된 평가 도구들인, 부모용 아동 행동 조사표(Child Behavior Checklist)의 한국판, DSM-III-R에 따른 파탄적 행동 장애 척도(Disruptive behavior disorders scale according to DBM-III-R)의 한국판, 예일 아동 평가표(Yale children's inventory)의 한국판, 소아 우울 척도(Children's Depression Inventory)의 한국촌, 소아용 상태 및 특성불안 척도(State-Trait Anxiety Inventory for children)의 한국판, 피어스-해리스 자기 개념 척도(Piers-Harris self-concept questionnaire)의 한국판. 가정 환경 척도(Family environment Scale)의 한국판, 간이 정신진단 검사(Symptom check-list-90)의 한국판, 경련질환에 대한 부모태도 척도(Parent's attitude to epilepsy questionnaire)의 한국판, 아동 의존척도(self-administered dependency questionnaire)의 한국판을 사용하였고, 이들 결과로 부터 얻은 자료의 일부인 환아의 정신병리 부분과 경련 질환의 신경과적인 변수들인 환아의 성별 및 나이, 경련 질환 발병시 나이와 유병기간, 경련질환의 임상적 유형, 뇌파의 유형 최근 6개월간의 경련 빈도, 항경련 약물 치료력과 그 반응등과의 관련성을 평가하였다. 위에서 얻은 자료들을 토대로 분석하여 다음과 같은 연구 결과를 얻었다. 환아의 우울과 관계된 위험 요인은, 조기 발병(early onset), 복합성 부분 간질(complex partial seizure), 뇌파상 편측성 측두엽 이상(lateralized temporal focal abnormality in EEG), 약물 병합 투여(drug polypharmacy), 고 빈도 경련(high seizure frequency)임을 알 수 있었고, 이들 위험요인들은 상호 연관되어 있었다. 불안에 영향을 미치는 요인은 높은 연령. 뇌파상 편측성 측두엽 이상, 고 빈도 경련이었고, 학습 및 언어적 문제와 관련이 있는 위험 요인은 환아의 어린나이, 조기 발병, 복합성 부분 간질, 고빈도 경련 등이었다. 주의력 결핍 과잉행동 장애와 반항 및 품행장애에 영향을 미치는 위험 요인은 남성, 어린 나이, 조기 발병, 뇌파상 편측성 측두엽 이상, 고 빈도 경련등이었다. 위의 결과를 종합하면, 우울, 불안, 품행장애 및 주의력 결핍 과잉 행동장애에 공통적으로 관계되는 위험요인은, 뇌파상 편측성 측두엽 이상, 고 빈도 경련이라는 겻을 알 수 있었다. 향후 연구를 통해서는 신경학적 요인이외에 가족 및 사회-인구학적 위험 요인을 찾는 연구가 지속되어야 하며, 이를 통해 종합적 위험 요인 평가 작업과 치료적 대안을 제시하는 후속 작업이 지속 되어야 할 것 이다.

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SRP(Stress Reduction Program)을 적용하여 호전된 공황장애 48세 남환 치험 1례 (A Clinical Report about Panic Disorder Patient imporved by Stress Reduction Program)

  • 서진우;김종우;정선용;박소정
    • 동의신경정신과학회지
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    • 제18권3호
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    • pp.157-164
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    • 2007
  • The SRP program(stress reduction program) is reported has a good effect to patient to escape from anxiety. To reduce several symptoms due to anxiety, we performed some SRP programs to our patient who had suffered anxiety disorder. The measurement tools of patient's improvement we used are Heart Rate Variability and State-Trait Anxiety Inventory. Through this programs, symptoms and feeling of anxiety were decreased than first time and Autonomic nerve system balance was much improved. this is caused by effort of self-control meditation, mindfullness, breathing instruction and muscle relaxation program.

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Development of Web-based Automatic Demand Forecasting Module

  • Kang, Soo-Kil;Kang, Min-Gu;Park, Sun-Won
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2005년도 ICCAS
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    • pp.2490-2495
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    • 2005
  • The scheduling of plant should be determined based on the product demands correctly forecasted by reasonable methods. However, because most existing forecasting packages need user's knowledge about forecasting, it has been hard for plant engineers without forecasting knowledge to apply forecasted demands to scheduling. Therefore, a forecasting module has been developed for plant engineers without forecasting knowledge. In this study, for the development of the forecasting module, an automatic method using the ARIMA model that is framed from the modified Box-Jenkins process is proposed. And a new method for safety inventory determination is proposed to reduce the penalty cost by forecasting errors. Finally, using the two proposed methods, the web-based automatic module has been developed.

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