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Industrial Systems (industrial + system)
Selected AbstractsIS TRUST A DRIVER FOR TERRITORIALLY EMBEDDED INDUSTRIAL SYSTEMS?GEOGRAFISKA ANNALER SERIES B: HUMAN GEOGRAPHY, Issue 4 2007A CASE STUDY OF THE HOME-BUILDING INDUSTRY IN NORWAY ABSTRACT Trust is said to be necessary for creating and maintaining territorially embedded industrial systems. On the basis of data for the Norwegian home-building sector, this article analyses trust and price competition; how trust is built and dismantled; and trust and place. The main findings are that: trust and price competition interact, but trust is more important in the design and planning phases than in the construction phase; economic factors are important for building trust, together with competence and team work; and trust is related to space, partly through places embodied in trust and partly through trust embedded in places. However, this embeddedness is not like that which has long been claimed to exist in territorially embedded industrial systems, but embeddedness where trust acts as a reinforcement, contingent upon other factors, as a capacity restraint and a socially constructed need for face-to-face meetings. [source] Regional industrial recycling network in energy supply,the case of Joensuu city, FinlandCORPORATE SOCIAL RESPONSIBILITY AND ENVIRONMENTAL MANAGEMENT, Issue 3 2002Jouni Korhonen Industrial recycling networks offer an example of the practical application of some of the industrial ecology (IE) principles. In the industrial ecosystem and eco-industrial park approaches the material cycles and energy cascades in a natural ecosystem serve as the metaphoric vision for a local/regional industrial system in which waste material and waste (residual) energy are utilized through cooperation between the actors in the system. In this paper, a local/regional recycling network scenario is presented with the energy supply system of the city of Joensuu in Finland. The conditions of success include the co-production of heat and electricity (heat and power, CHP), waste energy utilization for industrial steam and renewable flow use as fuel. Some difficulties in the industrial ecosystem-type development of the system are discussed. Methodological suggestions for industrial ecosystem and eco-industrial park case studies are considered and the experience from this Finnish case is discussed in terms of wider application of IE in local/regional economic energy systems. For future research on the theme, it is suggested that regional industrial ecology may benefit from regional economics theory and, vice versa, regional economics theory may find a new area of application in regional industrial ecology. Copyright © 2002 John Wiley & Sons, Ltd. and ERP Environment. [source] Modeling an electrochemical process to remove Cr(VI) from rinse-water in a stirred reactorJOURNAL OF CHEMICAL TECHNOLOGY & BIOTECHNOLOGY, Issue 4 2003Miriam G Rodríguez Abstract Experimental studies were developed in a batch reactor (16,dm3), to obtain the kinetic model of Cr(VI) removal by means of an electrochemical process. An overall kinetic model was obtained and experimentally validated in a continuous stirred electrochemical reactor (16,dm3) with synthetic and industrial wastewater. To develop the mathematical model of the continuous reactor in relation to the Cr(VI) and Fe(II) concentration in the solution, a classical mass balance procedure was performed. The Cr(VI) concentration in the electrochemically-treated waters was less than 0.5,mg,dm,3. In the electrochemical process the Cr(VI) reduction is caused by the Fe(II) released from the anode due to the electric current applied, by the Fe(II) released for the dissolution (corrosion) of the electrodes due to the acidic media, and by reduction at the cathode. During the process, reduction from Fe(III) to Fe(II) occurs. All of these different reactions cause a diminution in the quantity of sludge generated. Finally, it was found that due to the slow rate of reduction of Cr(VI) during the first part of the process it is necessary to develop a method of control to apply the process in a continuous industrial system. © 2003 Society of Chemical Industry [source] Molecular simulation of separation of CO2 from flue gases in CU-BTC metal-organic frameworkAICHE JOURNAL, Issue 11 2007Qingyuan Yang Abstract In this work, a computational study was performed on the adsorption separation of CO2 from flue gases (mixtures of CO2/N2/O2) in Cu-BTC metal-organic framework (MOF) to investigate the applicability of MOFs to this important industrial system. The computational results showed that Cu-BTC is a promising material for separation of CO2 from flue gases, and the macroscopic separation behaviors of the MOF were elucidated at a molecular level to give insight into the underlying mechanisms. The present work not only provided useful information for understanding the separation characteristics of MOFs, but also showed their potential applications in chemical industry. © 2007 American Institute of Chemical Engineers AIChE J, 2007 [source] Mining temporal rules for software maintenanceJOURNAL OF SOFTWARE MAINTENANCE AND EVOLUTION: RESEARCH AND PRACTICE, Issue 4 2008David Lo Abstract Software evolution incurs difficulties in program comprehension and software verification, and hence it increases the cost of software maintenance. In this study, we propose a novel technique to mine from program execution traces a sound and complete set of statistically significant temporal rules of arbitrary lengths. The extracted temporal rules reveal invariants that the program observes, and will consequently guide developers to understand the program behaviors, and facilitate all downstream applications such as verification and debugging. Different from previous studies that were restricted to mining two-event rules (e.g., ,lock,,,unlock,), our algorithm discovers rules of arbitrary lengths. In order to facilitate downstream applications, we represent the mined rules as temporal logic expressions, so that existing model checkers or other formal analysis toolkit can readily consume our mining results. Performance studies on benchmark data sets and a case study on an industrial system have been performed to show the scalability and utility of our approach. We performed case studies on JBoss application server and a buggy concurrent versions system application, and the result clearly demonstrates the usefulness of our technique in recovering underlying program designs and detecting bugs. Copyright © 2008 John Wiley & Sons, Ltd. [source] A Study on Modern High Effective Random Packings for Ethanol-Water RectificationCHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 7 2008S. Darakchiev Abstract Raschig Super-Ring is a modern and high-efficient packing used for intensification of absorption and distillation processes. The aim of this work is to characterize the efficiency of this packing applied to rectification of an important industrial system, ethanol-water, and to compare its efficiency to that of some random packings of the third generation as well as to the structured packing, HOLPACK, which is used in the ethanol production industry. The experiments were carried out in a column installation, 0.213,m in diameter with a packing height of 2.8,m. The column is heated by a number of electrical heaters (total power 45,kW), which can be switched gradually. Operation at total and partial reflux is possible. Eight types of random packings were studied: five types of Raschig Super-Ring, four metallic (with characteristic dimensions 0.5, 0.6, 0.7, and 1") and one of plastic material 0.6"; two types of packing IMTP and one plastic Ralu Flow. Some experiments were conducted at total reflux operation at vapor velocity, 0.253,0.936,m/s, and liquid superficial velocity, 4.44,·,10,4,1.63,·,10,3,m3/(m2s). Experiments at partial reflux were carried out at constant liquid superficial velocity and changeable vapor velocity as well as at constant vapor velocity and changeable liquid velocity. The results are presented as height of transfer unit, HTU, and height equivalent to a theoretical plate, HETP, as a function of the velocity of phases. [source] A Model-Based Method for an Online Diagnostic Knowledge-Based SystemEXPERT SYSTEMS, Issue 3 2001Chrissanthi Angeli Fault diagnosis is very important for modern production technology and has received increasing theoretical and practical attention during the last few years. This paper presents a model-based diagnostic method for industrial systems. An online, real-time, deep knowledge based fault detection system has been developed by combining different development environments and tools. The system diagnoses, predicts and compensates faults by coupling symbolic and numerical data in a new environment suitable for the interaction of different sources of knowledge and has been successfully implemented and tested on a real hydraulic system. [source] IS TRUST A DRIVER FOR TERRITORIALLY EMBEDDED INDUSTRIAL SYSTEMS?GEOGRAFISKA ANNALER SERIES B: HUMAN GEOGRAPHY, Issue 4 2007A CASE STUDY OF THE HOME-BUILDING INDUSTRY IN NORWAY ABSTRACT Trust is said to be necessary for creating and maintaining territorially embedded industrial systems. On the basis of data for the Norwegian home-building sector, this article analyses trust and price competition; how trust is built and dismantled; and trust and place. The main findings are that: trust and price competition interact, but trust is more important in the design and planning phases than in the construction phase; economic factors are important for building trust, together with competence and team work; and trust is related to space, partly through places embodied in trust and partly through trust embedded in places. However, this embeddedness is not like that which has long been claimed to exist in territorially embedded industrial systems, but embeddedness where trust acts as a reinforcement, contingent upon other factors, as a capacity restraint and a socially constructed need for face-to-face meetings. [source] The Nordic ,Cultural Industries': A Cross-National Assessment of the Place of the Cultural Industries in Denmark, Finland, Norway and SwedenGEOGRAFISKA ANNALER SERIES B: HUMAN GEOGRAPHY, Issue 3 2003Dominic Power ABSTRACT In this paper an attempt is made to measure the cultural industries in a cross-national context. The paper starts with a discussion of the definition and delineation of the term the ,cultural industries'. It is argued that a large range of goods and services may be considered to be cultural industry products and that it is important to place the production and exchange of such products in the context of an industrial systems approach. Following this the concept is operationalised using data on employment and firm activity from Denmark, Finland, Norway and Sweden. Results are presented which suggest that overall growth in both employment and firm numbers has been especially strong in the cultural industries. However, interesting differences between the countries emerged from the data. Thus regional dimensions are then examined resulting in the finding that in all four countries cultural industries have a strong attraction to urban areas but an even stronger propensity to agglomerate. It is suggested that the spatial dynamics observed may be key to the development of the industries' competencies and success. In summary the paper presents results of extensive data analysis that show the cultural industries' important contribution to Scandinavian economies and labour markets. [source] The Ecosystem: Model or Metaphor?JOURNAL OF INDUSTRIAL ECOLOGY, Issue 2 2010Epistemological Difficulties in Industrial Ecology Summary Industrial ecology offers an original way of looking at economic activities. The approach is based on an analogy between certain objects studied by the science of ecology (ecosystems, metabolisms, symbiosis, biocenosis, etc.) and industrial systems. However, this analogical relationship raises difficulties due to the various interpretations to which it is open. Although there is agreement regarding its heuristic function, the analogy can nevertheless be understood either as a model or as a metaphor. The present article first attempts to show how models differ from metaphors. It then sets out to justify the epistemological relevance of this distinction for industrial ecology research. The reflection should thus contribute to clarifying the debate on the (supposed or desired) role of analogy in the field of industrial ecology and heighten the interest this field of investigation represents for implementing sustainable development. [source] An efficient real-time method of analysis for non-coherent fault treesQUALITY AND RELIABILITY ENGINEERING INTERNATIONAL, Issue 2 2009Rasa Remenyte-Prescott Abstract Fault tree analysis is commonly used to assess the reliability of potentially hazardous industrial systems. The type of logic is usually restricted to AND and OR gates, which makes the fault tree structure coherent. In non-coherent structures not only components' failures but also components' working states contribute to the failure of the system. The qualitative and quantitative analyses of such fault trees can present additional difficulties when compared with the coherent versions. It is shown that the binary decision diagram (BDD) method can overcome some of the difficulties in the analysis of non-coherent fault trees. This paper presents the conversion process of non-coherent fault trees to BDDs. A fault tree is converted to a BDD that represents the system structure function (SFBDD). An SFBDD can then be used to quantify the system failure parameters but is not suitable for the qualitative analysis. Established methods, such as the meta-products BDD method, the zero-suppressed BDD (ZBDD) method and the labelled BDD (L-BDD) method, require an additional BDD that contains all prime implicant sets. The process using some of the methods can be time consuming and is not very efficient. In addition, in real-time applications the conversion process is less important and the requirement is to provide an efficient analysis. Recent uses of the BDD method are for real-time system prognosis. In such situations as events happen, or failures occur, the prediction of mission success is updated and used in the decision-making process. Both qualitative and quantitative assessments are required for the decision making. Under these conditions fast processing and small storage requirements are essential. Fast processing is a feature of the BDD method. It would be advantageous if a single BDD structure could be used for both the qualitative and quantitative analyses. Therefore, a new method, the ternary decision diagram (TDD) method, is presented in this paper, where a fault tree is converted to a TDD that allows both qualitative and quantitative analyses and no additional BDDs are required. The efficiency of the four methods is compared using an example fault tree library. Copyright © 2008 John Wiley & Sons, Ltd. [source] The use of not logic in fault tree analysisQUALITY AND RELIABILITY ENGINEERING INTERNATIONAL, Issue 3 2001J. D. Andrews Abstract Risk and safety assessments carried out on potentially hazardous industrial systems commonly employ fault tree analysis to predict the probability or frequency of system failure. Causes of the system failure mode are developed in an inverted tree structure where the events are linked using logic gates. The type of logic is usually restricted to AND and OR gates which makes the fault tree structure coherent. The use, directly or indirectly, of the NOT logic gate is generally discouraged as this can result in a non-coherent structure. Non-coherent structures mean that components' working states contribute to the failure of the system. The qualitative and quantitative analysis of such fault trees can present additional difficulties when compared to the coherent versions. This paper examines some of the difficulties that can occur, and what potential benefits can be derived from the incorporation of NOT logic. It is shown that the binary decision diagram (BDD) method can overcome some of the difficulties in the analysis of non-coherent fault trees. Copyright © 2001 John Wiley & Sons, Ltd. [source] | ||||||||||||||||