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FLEXIBILITY IS NEXT BEYOND QUALITY AND EFFICIENCY IN PRODUCTION SYSTEMS
ROMUALD I. ZALEWSKI,EULALIA SKAWI.SKA 한국상품학회 2004 商品學硏究 Vol.- No.32
The problem of quality as a diminishing source of competitive advantage has been addressed. Quality and effectiveness does no longer guarantee a success. Customers want "tailor.made" products and companies must seek for flexibility, which emerge as a new competitive advantage beyond quality. Multidimensional construct of flexibility and flexibility mix were described. Applicability of flexibility potential in various production systems has been characterized.
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Optimization of fairway design parameters: Systematic approach to manoeuvring safety
Gucma, Stanislaw,Zalewski, Pawel The Society of Naval Architects of Korea 2020 International Journal of Naval Architecture and Oc Vol.12 No.1
The article presents a systematic approach to design of marine navigation channels parameters resulting from manoeuvring and operational safety. Relations between the parameters of waterway system elements and the conditions of safe ship operation have been determined and the objective function of waterway parameters' optimization problems has been minimized with respect to variables of construction and operation costs. These costs have been functionally associated to variables of channel width at the bottom and fairway depth. The method of fairway's width computation at specified safe depth at the preliminary and detailed stages of waterway design has been proposed. The results of this method application have been illustrated with two examples: 1. The modernization of Szczecin-Swinoujscie fairway aimed at accepting vessels of 60,000 DWT capacity. 2. Construction of an approach channel leading to a newly built container terminal in Swinoujscie harbour (Poland), handling ocean-going container ships of 20,000 TEU capacity.
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Optimization of fairway design parameters: Systematic approach to manoeuvring safety
Gucma, Stanislaw,Zalewski, Pawel The Society of Naval Architects of Korea 2020 International Journal of Naval Architecture and Oc Vol.12 No.-
The article presents a systematic approach to design of marine navigation channels parameters resulting from manoeuvring and operational safety. Relations between the parameters of waterway system elements and the conditions of safe ship operation have been determined and the objective function of waterway parameters' optimization problems has been minimized with respect to variables of construction and operation costs. These costs have been functionally associated to variables of channel width at the bottom and fairway depth. The method of fairway's width computation at specified safe depth at the preliminary and detailed stages of waterway design has been proposed. The results of this method application have been illustrated with two examples: 1. The modernization of Szczecin-Swinoujscie fairway aimed at accepting vessels of 60,000 DWT capacity. 2. Construction of an approach channel leading to a newly built container terminal in Swinoujscie harbour (Poland), handling ocean-going container ships of 20,000 TEU capacity.
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The Simulation and Research of Information for Space Craft
H.Kim,R.Jhonson,D.Zalewski,Z.Qu,S.T.Durrance,C.Ham 한국산학기술학회 2001 한국산학기술학회논문지 Vol.2 No.2
우주 항공위성 시스템은 변하는 불확실한 우주항공 환경에(서) 운행되고 지상기지국으로부터의 원격통신 없이 장시간 동안 동작해야 할 자율적인 능력이 요구되고, 결합 없이 임무를 수해하여야 하며, 시스템에서 계측된 데이터의 신뢰성을 유지하기 위한 고장 상태 검출과 오류 수정 시스템을 확보하는 것이 중요하다. 본 논문에소는 학작 칼만 필터 기법을 적용한 동적모델 시뮬레이션 기법(High Fidelity, Dynamic Model-based Simulation)을 제안하였으며, 제안된 시스템은 비정상적인 데이터의 효과적인 검출과 대응이 가능해짐으로쏘 신뢰성 있는 우주항공위성시스템를 구축하도록 자동 상태 진단/데이터 시스템에 고장검출/오류수정 시스템을 적용하는 것이다.(Autonomous Spacecraft Health Monitoring/Data Validation Control System : ASHMDVCS). Space systems are operating in a changing and uncertain space environment and are desired to have autonomous capability for long periods of time without frequent telecommunicatioos from the ground station. At the same time, requirements for new set of projects/systems calling for "autonomous" operations for long unattended periods of time are emerging. Since. by the nature of space systems. it is desired that they perform their mission flawlessly and also it is of extreme importance to have fault-tolerant sensor/actuator sub-systems for the purpose of validating science measurement data for the mission success. Technology innovations attendant on autonomous data validation and health monitoring are articulated for a growing class of autonomous operations of space systems. The greatest need is on focus research effort to the development of a new class of fault-tolerant space systems such as attitude actuators and sensors as well as validation of measurement data from scientific instruments. The characterization for the next step in evolving the existing control processes to an autonomous posture is to embed intelligence into actively control. modify parameters and select sensor/actuator subsystems based on statistical parameters of the measurement errors in real-time. This research focuses on the identification/demonstration of critical technology innovations that wi1l be applied to Autonomous Spacecraft Health Monitoring/Data Validation Control Systems(ASHMDVCS).
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Joanna Słomko,Monika Zawadka-Kunikowska,Mariusz Kozakiewicz,Jacek J. Klawe,Małgorzata Tafil-Klawe,Julia L. Newton,Paweł Zalewski 연세대학교의과대학 2018 Yonsei medical journal Vol.59 No.9
This study aimed to analyze the impact of sleep deprivation (SD) on cardiac, hemodynamic, and endothelial parameters and todetermine whether these are sustained with increased periods of SD. The study included 60 healthy men (mean: age 31.2±6.3years; body mass index 24.6±2.6 kg/m2). Hemodynamic parameters, parameters of myocardial contractility, spectral analysis ofheart rate (HR) and blood pressure (BP) variability, and the sensitivity of arterial baroreflex function were evaluated. Biochemicaltests were performed to assess L-arginine (L-Arg) and asymmetric dimethylarginine (ADMA) levels in reflection of endothelialnitric oxide synthase ability. Measurements of cardiovascular system parameters were obtained at 9 a.m. (baseline) on the firstday of the study and 9 a.m. (24-h SD), 1 p.m. (28-h SD), and 5 p.m. (32-h SD) on the second day. Blood samples for evaluatingbiochemical parameters were obtained at baseline and after 24-h SD. ANOVA Friedman’s test revealed a significant effect fortime in relation to HR (χ2=26.04, df=5, p=0.000), systolic BP (χ2=35.98, df=5, p=0.000), diastolic BP (χ2=18.01, df=5, p=0.003), andmean BP (χ2=28.32, df=5, p=0.000). L-Arg and ADMA levels changed from 78.2±12.9 and 0.3±0.1 at baseline to 68.8±10.2 and0.4±0.1 after 24-hr SD, respectively (p=0.001, p=0.004). SD in healthy men is associated with increases in BP, which appear to occurafter 24 hours of SD and are maintained over increasing periods of SD. The observed hemodynamic changes may have resulteddue to disordered vascular endothelial function, as reflected in alterations in L-Arg and ADMA levels.
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