Agnieszka Tubis and Sylwia Werbińska-Wojciechowska
In the presented paper, authors focus on the issues related to risk assessment of transport processes performance. Thus, there are presented the basic definitions related to the research area. Later, there is discussed the possibility of risk assessment performance in the freight transport, outlining an assessment approach compatible with ISO 31000 standard and ERM concept. This gives the possibility for the presentation of risk assessment of transport processes performance in the chosen road transport company. The article concludes with a summary, including directions for further research.
Students usually have difficulties to understand abstract concepts of process control. Implementing in teaching process the inquiry-based learning helps students to follow methods and practices similar to those of professional scientists in order to construct knowledge. The paper describes the steps reached in simulation-based learning: from experimental data obtained by the students in their practical method (study and measurement of variables to some fermentation processes) to the simulated the behaviour of the process under a feedback control system. By providing opportunities for students to check their understanding and reflect on their learning process performance is enhanced over a traditional lecture course.
This work focuses on studying signal detection using three different equalization techniques, namely: Zero Forcing (ZF), Minimum Mean Square Error (MMSE) and Beam Forming (BF), for a 4×4 MIMO-system. Results show that ZF equalization is the simplest technique for signal detection, However, Beam Forming (BF) gives better Bit Error Rate (BER) performances at high Signal to Noise Ratio (SNR) values with some complexity in design. For more antennas at the base station, it is too complex to design the weight matrix for ZF, however, it is suitable for BF with the help of good quality digital signal processors. Performance of MIMO-system, with 8 antennas at the base station using BF equalization, is analysed to get BER values at different SNR. Results show a considerable improvement in BER for 8 antennas at the base station.
Bożenna Pisarska, Wojciech Mikołajczak, Hanna Jaroszek, Mariusz Nowak, Rafał Dylewski and Barbara Cichy
In a batch electro-electrodialysis (EED), sodium sulphate solution with an initial concentration of 80.90 g/dm3 was converted to obtain solutions of sodium hydroxide (13.96%) and sulphuric acid (10.15%) and a dialysate (3.23 g/dm3 of sulphate ions). Changes in the EED process′ performance (temperature, cell voltage, concentrations, energy consumption) with an increasing conversion degree of salt are presented. Based on the presented results of the batch experiment, conditions necessary to run the process continuously are discussed. A single pass method is inapplicable due to excessive heating of the electro-electrodialyser. A cascade method enables interstage cooling of the solutions, providing temperatures suitable for ion-exchange membranes to work. Increasing the number of stages in the cascade reduces both the number of electro-electrodialysers and specific electric energy consumption, providing the same production capacity. However, this increases the investment cost.
Interlacer is the key part of interlacing technology that is adopted to improve the cohesion between loose multifilaments. Aimed at finding the interlacers with better performance, the present research designed five interlacers that can be classified into round type and cornered type. These five interlacers are different in cross-sectional shapes of yarn channel but are the same in the cross-sectional area. The evaluation of the performance of the interlacer includes the number and the strength of the tangles of the interlaced yarn it produces. Experiments are carried out at various supplied air pressures, yarn speeds and feed ratios. It was found that the interlacer with round cross-sectional shape of yarn channel is capable of producing an interlaced yarn with a large number of tangles and the cornered cross-sectional shape is effective in improving the strength of tangles. Among these five interlacers, the interlacer with an elliptical or an inverse-triangular shape has the best processing performance
In the presented paper, author focus on the issues related to risk assessment of transport processes performance. The author presented the characteristics of the traditional approach to risk assessment in transport, which is popular in the literature. This approach addresses the strategic risk assessment for the road transport system and it focuses primarily on aspects related to the transport safety. The business approach to risk assessment from the perspective of the managers of the transport process is presented in the next part of the article. In this case, the subject of the analysis is the operational risk, which focuses on the risks affecting the implementation of the transport process and the achievement of the company’s operational objective. The article concludes with a summary, including directions for further research.
The effective management approach: integration of business, quality management and knowledge management processes
In the nowadays' dynamic environment only those organizations can survive that are able quickly react to opportunities and threats from the environment and to produce innovation ideas and turn them into products and services at a quicker pace then the competition. Therefore organizations seek different ways how to get ahead competitors. As quality management and knowledge management have proved themselves as perspective fields author of the paper proposes the integrated approach of both areas in order organizations can gain the most possible benefit from applying them. This paper shows the deeper aspects of both of these fields from the point of view of the process approach. Here is discussed the interactions of quality management, knowledge management and business processes. An elaborated organizational business and quality management process chart shows how quality management processes support the organization's management by providing information about system effectiveness, process performance, customer satisfaction and requirements. This information can be successfully used as a basis for decision-making concerning the necessary improvements and organization future goals. An integrated organizational business, quality management and knowledge management process chart demonstrates how effective management of an organization's knowledge assets can help to improve the organization's tasks in the sense of organizational performance, effectiveness and innovations. This paper is a beginning of the research toward the development of knowledge management services for quality management.
Mulat Alubel Abtew, Subhalakshmi Kropi, Yan Hong and Linzi Pu
The main aim of this research was to implement appropriate Statistical Process Control (SPC) techniques for quality characteristics on sewing floor of garment Industry. Among different SPC quality improvements tools, control charts have been selected. After analyzing and selecting different critical parameters based on company and customer requirements, the X-bar and R charts for variable and c-charts for attribute quality characteristics have been identified and implemented in the trouser sewing lines for quality improvement. The check points for selected control chart implementation have also been designed. Remedial action plans for the occurred special cause variations and process stability were developed. The project incorporated theoretical and on-job training schemes for different quality team members, to understand the SPC concept and its implementation procedure. After implementation, significant improvements in the sewing section were achieved. The four months analysis before and after implementation of the SPC tools showed that the rejection percentage was reduced from 9.141% to 6.4%. Successful implementation of the result of this project can significantly improve process performance of other similar manufacturing units with appropriate modification.
Background and Purpose: Modern companies have found themselves in a situation where the ability for the dynamic adaptation to the changing market conditions is a key competitive advantage. Therefore they are continually searching for intensive ways of improvement of their processes and products. The basis for the implementation of such strategy is the efficient use of information resources. In quality management, appropriate tools and techniques equip decision-makers with information, necessary to take: correction, corrective, preventive, and finally – improvement actions.
Design/Methodology/Approach: The paper presents the results of the survey, conducted on a representative sample of manufacturing companies in Great Poland (region of Poland). The main goal of the survey was to ascertain, from the quality assurance perspective, what kind of problems, at which stage of production process are the most frequent and what kind of quality tools and techniques are used by practitioners for their solutions. Furthermore, the respondents evaluated the importance of appearing problems as well as the effectiveness of used tools.
Results: The results of the survey show that quality tools are most frequently implemented at the manufacturing phase of the production process, then at the production set-up stage and measurement phase. On the manufacturing phase example it was shown, which of the tools included in the survey, are effectively used for problem solutions, concerning the process inputs, process performance and management of the processes.
Conclusion: The obtained results allow contradicting the thesis spreading quality tools universality. In the context of production process stages, some of them are oriented towards selected phases and, such as, may be effectively used by practitioners.
The Influence of Selected Factors on the Removal of Anionic Contaminants from Water by Means of Ion Exchange MIEX®DOC Process
The study of the effectiveness of the removal of anionic natural organic matter (fulvic acids-FA and humic acids-HA) and inorganic anions (F-, Br-, NO3-) in MIEX®DOC process was performed. The influence of physico-chemical parameters of feed water on the process performance was investigated. The ion exchange process was carried out using strongly basic, macroporous polystyrene resin MIEX® by Orica Watercare. The synthetic feed waters differ in composition, i.e. concentration of FA and HA (ca. 6 and 12 mg/L), anions content (F-, Br-, NO3-) and of various alkalinity (ca. 20 and 120 mg/L as CaCO3) were used. The study confirmed the possibility of application of MIEX®DOC process for removal of anionic contaminants from water. It also showed the significant impact of feed water parameters on the process effectiveness. Moreover, the strong dependence of anions (F-, Br-, NO3-) removal, FA and HA concentration on the resin dose was revealed.