THE USE OF SIMULATION TO EVALUATE AND ENHANCE THE PERFORMANCE OF PASSPORTS AND CIVIL AFFAIRS SECTOR

In this thesis, the proposed project intends to study the use of Decision Support Systems in simulating Gaza Civil Affairs and Passports Directorate (GCAPD) through identifying the current environment, analyzing the status, and proposing a new system using simulation to determine the optimal number of service providers for the system in order to reduce the postponement of the public services

Space transportation system and associated payloads: Glossary, acronyms, and abbreviations

A collection of some of the acronyms and abbreviations now in everyday use in the shuttle world is presented. It is a combination of lists that were prepared at Marshall Space Flight Center and Kennedy and Johnson Space Centers, places where intensive shuttle activities are being carried out. This list is intended as a guide or reference and should not be considered to have the status and sanction of a dictionary

Iterchanging Discrete Event Simulationprocess Interaction Modelsusing The Web Ontology Language - Owl

Discrete event simulation development requires significant investments in time and resources. Descriptions of discrete event simulation models are associated with world views, including the process interaction orientation. Historically, these models have been encoded using high-level programming languages or special purpose, typically vendor-specific, simulation languages. These approaches complicate simulation model reuse and interchange. The current document-centric World Wide Web is evolving into a Semantic Web that communicates information using ontologies. The Web Ontology Language OWL, was used to encode a Process Interaction Modeling Ontology for Discrete Event Simulations (PIMODES). The PIMODES ontology was developed using ontology engineering processes. Software was developed to demonstrate the feasibility of interchanging models from commercial simulation packages using PIMODES as an intermediate representation. The purpose of PIMODES is to provide a vendor-neutral open representation to support model interchange. Model interchange enables reuse and provides an opportunity to improve simulation quality, reduce development costs, and reduce development times

Model-Based Engineering of Collaborative Embedded Systems

This Open Access book presents the results of the "Collaborative Embedded Systems" (CrESt) project, aimed at adapting and complementing the methodology underlying modeling techniques developed to cope with the challenges of the dynamic structures of collaborative embedded systems (CESs) based on the SPES development methodology. In order to manage the high complexity of the individual systems and the dynamically formed interaction structures at runtime, advanced and powerful development methods are required that extend the current state of the art in the development of embedded systems and cyber-physical systems. The methodological contributions of the project support the effective and efficient development of CESs in dynamic and uncertain contexts, with special emphasis on the reliability and variability of individual systems and the creation of networks of such systems at runtime. The project was funded by the German Federal Ministry of Education and Research (BMBF), and the case studies are therefore selected from areas that are highly relevant for Germany’s economy (automotive, industrial production, power generation, and robotics). It also supports the digitalization of complex and transformable industrial plants in the context of the German government's "Industry 4.0" initiative, and the project results provide a solid foundation for implementing the German government's high-tech strategy "Innovations for Germany" in the coming years

Modelling flexible manufacturing systems through discrete event simulation

As customisation and product diversification are becoming standard, industry is looking for strategies to become more adaptable in responding to customer’s needs. Flexible manufacturing systems (FMS) provide a unique capability where there is a need to provide efficiency through production flexibility. Full potential of FMS development is difficult to achieve due to the variability of components within this complex manufacturing system. It has been recognised that there is a requirement for decision support tools to address different aspects of FMS development. Discrete event simulation (DES) is the most common tool used in manufacturing sector for solving complex problems. Through systematic literature review, the need for a conceptual framework for decision support in FMS using DES has been identified. Within this thesis, the conceptual framework (CF) for decision support for FMS using DES has been proposed. The CF is designed based on decision-making areas identified for FMS development in literature and through industry stakeholder feedback: set-up, flexibility and schedule configuration. The CF has been validated through four industrial simulation case studies developed as a part of implementation of a new FMS plant in automotive sector. The research focuses on: (1) a method for primary data collection for simulation validated through a case study of material handling robot behaviour in FMS; (2) an approach for evaluation of optimal production set-up for industrial FMS with DES; (3) a DES based approach for testing FMS flexibility levels; (4) an approach for testing scheduling in FMS with the use of DES. The study has supported the development of systematic approach for decision making in FMS development using DES. The approach provided tools for evidence based decision making in FMS

NASA SBIR abstracts of 1991 phase 1 projects

The objectives of 301 projects placed under contract by the Small Business Innovation Research (SBIR) program of the National Aeronautics and Space Administration (NASA) are described. These projects were selected competitively from among proposals submitted to NASA in response to the 1991 SBIR Program Solicitation. The basic document consists of edited, non-proprietary abstracts of the winning proposals submitted by small businesses. The abstracts are presented under the 15 technical topics within which Phase 1 proposals were solicited. Each project was assigned a sequential identifying number from 001 to 301, in order of its appearance in the body of the report. Appendixes to provide additional information about the SBIR program and permit cross-reference of the 1991 Phase 1 projects by company name, location by state, principal investigator, NASA Field Center responsible for management of each project, and NASA contract number are included

Using discrete event simulation for scheduling and long range capacity planning of a high volume press shop

The thesis expresses the essential requirement for and the use of Discrete Event Simulation (DES) in a high volume press shop. The press shop produces blanks and panels for the body shop, which manufactures three car models. DES is used to combat the battle between shop efficiency and low inventory. The process used to choose the most appropriate software package is described and then current situation in the press shop is discussed. The procedures involved in model creation follow set model construction guidelines. There are several assumptions made, which together with the constraints of the system, provide the limitations of the inputs facing the system. There is a trade off between model complexity and accuracy, so the setting of the constraints and assumptions often provided difficult decisions. Validation of the model is very important, so this was a lengthy process, involving using a series of dummy buffers to check inputs such as cycle times and batch quantities. The validated model is used to monitor the methods used to reduce inventory on the shop floor over a period of eight weeks and then used for 'What If? Scenarios, to ascertain the systems capacity and inventory levels underdifferent conditions. The scenarios include using volumes that are 100% higher on some models than the current situation and 20% less than currently. The findings are examined and proposals made for the introduction of the proposed volumes where possible. Findings of the scenarios highlight bottlenecks in the shop and areas for improvement. Using the model, the schedules can be changed quickly and easily to try and eliminate the bottlenecks and improve capacity. Conclusions discuss the problems encountered during the modelling process as well as the benefits. The integration of DES into the current scheduling processes in the shop poses no problems and the model will be used as an aid for capacity planning in the future

Space Transportation System and associated payloads: Glossary, acronyms, and abbreviations

A collection of acronyms in everyday use concerning shuttle activities is presented. A glossary of terms pertaining to the Space Transportation System is included

Manufacturing Intelligence in Process Control

Disertační práce je zaměřena na návrh a vývoj metody práce s využitím simulačních metod a integrace výrobní inteligence pro řízení, vyhodnocování a také plánování systémů výrobní a zásobovací logistiky. Důvodem vytvoření výsledku práce je také jeho uplatnitelnost z pohledu možnosti řešit komplexně zadanou úlohu a také rychlost s jakou simulační metody pracují. Obsah práce lze významově rozdělit do dvou základních fází, kde první tvoří teoretická část a druhou část praktická. Teoretická rovina práce mapuje v současnosti možné přístupy k řešení komplexních úloh z oblasti výrobní a zásobovací logistiky, počínaje analytickými metodami přes podobnost se složitějšími úlohami vědního oboru operační analýza až po simulační přístupy. V rámci této části jsou nejprve specifikovány klíčové ukazatele pro definici zkoumaného systému vycházející z logistického controllingu, které jsou poté doplněny o metody získávání těchto dat a závěrem teoretické části je doporučeno využití simulačních metod pro řešení těchto komplexních úloh. Praktickou část práce uvozuje volba simulačního nástroje Witness, přiblížení jeho stěžejních funkčních elementů a dvojice demonstračních příkladů. Oba si kladou za cíl ověřit způsob zadávání všech klíčových ukazatelů zkoumaného systému do simulačního modelu. Vytvořená metoda práce, jež je založena na parametrizovatelném simulačního modelu pro řešení úloh výrobní a zásobovací logistiky je závěrem praktické části zasazena do otevřeného cloudového prostředí v duchu průmyslu 4.0. Nedílným elementem disertační práce je seznámení uživatele s vytvořeným výsledkem práce, doporučení pro oblast teorie a praxe při řešení komplexních úloh výrobní a zásobovací logistiky a sumarizující závěr.The dissertation is focused on design and development of the method of work using simulation methods and integration of control system intelligence with evaluation and planning of production and supply logistics systems. The motivation for developing the thesis results is the applicability for a complex defined task and the speed with which the simulation methods work. The content of the thesis can be divided into two main parts, where the first one is the theoretical base and the second part is practical. The theoretical level of thesis is mapping currently available approaches to solving complex tasks from the area of production and supply logistics chains, starting with analytical methods, throughout similarity with more complex tasks of the operational analysis field, up to the simulation approaches. Within this part the key indicators of the researched system definition originated in logistic controlling are first specified and then supplemented by methods of obtaining data. The conclusion of a theoretical part is a list of recommended simulation methods to be used for solving these complex tasks. The practical part of the thesis begins by selecting the Witness simulation tool, the specification of its main building elements and the pair of demonstration examples. Both of theirs aim is to verify the way for the entering of all the key indicators to created simulation model. Proposed working method, according to the parametrical simulation model for solving the problems of the production and supply logistics, concludes the practical part embedded in an open cloud environment according to the concept of Industry 4.0. An integral part of the dissertation is providing information about results of work from the user point of view, the recommendations for the community of theory and practice when solving the complex tasks of production and supply logistics and a summarizing conclusion.352 - Katedra automatizační techniky a řízenívyhově