Volume 3 - 2012

IEM Graduates Transition to the Labour Market: The Importance of Internships (pp. 83-92)

Marlene Amorim, Carina Pimentel, Maria Joao Rosa
This paper addresses the role of internships for the transition of IEM graduates to the labour market. We conducted an exploratory study with former graduates from the University of Aveiro, Portugal, in order to develop our understanding about the role of internships for: i) the consolidation of knowledge acquired by students in IEM academic subjects; ii) the development of other competences which are not prevalent in IEM curriculum; iii) students’ subsequent professional integration, and their specialization in a given IEM sector or functional area. The paper provides a contribution for the development of knowledge about IEM internships, and offers insights for their improvement, notably for the articulation between the academia and the industry.

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Kaizen Workshop as an Important Element of Continuous Improvement Process (pp. 93-98)

Nedeljko Stefanic, Natasa Tosanovic, Miro Hegedic
Nowadays continuous improvement process is part of every world class manufacturing company. As such there is variety of different tools which help to manage it and lead it in the proper direction. Outcome of continuous improvement activities is flexible production with shorter lead time, and satisfied customer. To accomplish above mentioned goals, one of possible methods which can be used is kaizen. This paper presents basics of kaizen, and why it is important to conduct regular kaizen workshops as part of Continuous Improvement Process in a company. Also a Case Study about results of kaizen workshop in one Croatian Company is presented.

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Software Technologies for the Analysis of Blood Flow in the Human Body (pp. 99-104)

Aleksandar Nikolic, Milan Blagojevic, Miroslav Zivkovic, Aleksandar Aleksic, Slobodan Savic
This paper presents an overview on software technologies used in study of blood flow in the human body. Basic equations of fluid flow are presented and the basis for creating an independent software package PAK-F for the calculation of viscous fluid flow. The carotid artery bifurcation fluid flow simulations are compared by software PAK-F and COMSOL Multiphysics in the case study. Geometry of the carotid artery bifurcation is obtained through the analysis of images from CT scanner. Finite element model is created on real 3d geometry model. Presented numerical results show that developed software PAK-F corresponds well with results from COMSOL Multiphysic,

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Research in Industrial Engineering and Management: An Explorative Survey among Seven European IEM Departments (pp. 105-111)

Fiorella Brustolin, Gerald H. Jonker
The foundation of IEM departments in Europe has been accompanied by the rise of a new, complex research area, characterized by the interconnection among disciplines and the application of real life cases. This survey, based on discussions carried out at a European IEM symposium on this topic and on short interviews of the participants, illustrates the kaleidoscopic nature of IEM research and of the history of a set of seven IEM departments. IEM departments have shared research areas with closely linked academic disciplines as management, engineering and natural sciences. However, the symposium participants reported common issues and difficulties in conducting and developing IEM research, relative to the acceptation and recognition of IEM by colleagues from these traditional academic disciplines.Theanalysis of the survey data leaded to an insight in the possible causes of this phenomenon.IEM research represents a novel research approach with respect to that of classical academic disciplines, as far as its nature, methodology, and scope are concerned. This might cause a clear difficulty in aligning IEM research to the traditional academic research lines of the institutions where IEM is embedded.

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ALUMNI Indicator as a Criterion for Evaluating the Quality of Academic Institutions (pp. 113-119)

Snezana Sando, Miroslav Ferencak
This paper presents the model for ranking the quality of academic institutions, based on combination of academic and non – academic criteria. Each of the criteria consists of several indicators which are given certain relevance. The authors focused especially on the value of the ALUMNI indicator, which are given a total of 25% of the gravity factor. The use of this model will allow the forming of adequate methodology for the national ranking of the academic institutions.

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Bionic Assembly System: working modes, control and scheduling (pp. 121-131)

Branko Katalinic, Valentin E. Pryanichnikov, Kanji Ueda, Paulina Cesarec, Ilya Kukushkin, Roman Kettler
Innovations in the field of assembling systems are going in many directions. One of them is a creation of a new generation of automated assembly systems, based on natural phenomena. Bionic Assembly System (BAS) is a new concept of advanced assembling system, which combines two basic control structures and principles: centralized control system, based on the hierarchy and self-organizing control system, based on the heterarchy. This paper describes hybrid control structure, working scenarios, scheduling, reconfigurations and logic of working cycles during the assembly of one unlimited sequence of assembly orders. These systems have some additional possibilities for minimization of assembling time using system and layout reconfiguration. Different possibilities of the reconfiguration of BAS are shown in this paper.

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Synthesis Method of Control System for Spatial Motion of Autonomous Underwater Vehicle (pp. 133-141)

Vladimir Filaretov, Dmitry Yukhimets
The article deals with to the synthesis of autonomous underwater vehicle spatial motion control system on the basis of the decomposition principle. The entire control system is divided into six control subsystems with separate degrees of freedom. In turn, each subsystem consists of three control loops: the thruster control loop, the vehicle’s velocity control loop and the control loop of its position. The paper proposes different methods of synthesis of controllers for each of these loops. The mathematical simulation confirms that the synthesis strategy selected was correct and shows the high efficiency of the obtained control system.

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Reliability Assessment of Manufacturing Processes (pp. 143-151)

Tatyana Karaulova, Marina Kostina, Eduard Shevtshenko
Reliability of production processes is a key issue that ensures the stability of production system operation. It improves product quality and reduces production losses. In current paper, we introduce a framework for the fault analysis of production process, which provides the recommendations of corrective actions for the elimination of critical faults for machinery manufacturing. The central part of the proposed framework is an extension of the standard Failure Mode and Effect Analysis (FMEA) with a fault classifier and the estimation of FMEA parameters. The Bayesian Belief Network (BBN) is used to classify FMEA faults. In order to fit the analysis the BBN template duplicates the faults classifier structure.

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An Integrative Methodology for Simulation of FMS with Alternate Routings (pp. 153-161)

Chintankumar R. Patel, Dusan N. Sormaz
This paper reports on a simulation study of a sample FMS with integration of two flexibility types: routing flexibility and scheduling flexibility. The paper describes development of an integrative methodology in which process planning system IMPlanner is integrated with FMS control module. IMPlanner’s rule based process selection system and FMS’s control simulation model perform real-time data exchange in terms of the system status and part routings. FMS is simulated in Arena with four different routing decision policies: a) static best, b) static random, c) routing dynamic, and d) feature focused dynamic and two process selection criteria, machine utilization and machine queue size. Simulation model has been executed on the same data set for four mentioned routing decision policies and for four dispatching policies (FIFO, SPT, SIPT, LIPT). Results of each simulation run in terms of three performance measures; i) resource utilization, ii) throughput, and iii) work in progress (WIP) have been compared in order to determine best routing alternative selection policy, corresponding dispatching policy, and identify the best combination of those two policies. Statistical analysis has been performed on the results to identify the most significant factors that determine the FMS performance in the case of alternate routings.

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A Genetic Algorithm Approach for Minimizing Total Tardiness in Single Machine Scheduling (pp. 163-171)

Gursel A. Suer, Xiaozhe Yang, Omar I. Alhawari, Joel Santos, Ramon Vazquez
Minimizing total tardiness in single machine scheduling is known as NP-hard. In this paper, the problem is extended to include non-zero ready times and the preemption of jobs is not allowed. First, a mathematical model is developed. Due to computational complexities with the mathematical model, a Genetic Algorithm approach is also proposed and later its performance is compared with optimal solutions. The results show that GA can find optimal solution for small problems and near optimal solutions for large problems. The results also show that among Delay-only, Non-delay-only, and Random strategies, Non-delay strategy produced more robust solutions whereas random strategy found the optimal solution in smaller problem categories.

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