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Risk assessment issues in the process of freight transport performance

Abstract

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.

Open access
Teaching process control in food engineering: dynamic simulation of a fermentation control process

Abstract

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.

Open access
Processing of sodium sulphate solutions using the EED method: from a batch toward a continuous process

Abstract

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.

Open access
Design, Analysis of 4×4 and 8×8 MIMO System with ZF, MMSE and BF Techniques

Abstract

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.

Open access
Risk Assessment in Road Transport – Strategic and Business Approach

Abstract

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.

Open access
Effect of Geometry on Performance of Interlacer

Abstract

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

Open access
The effective management approach: integration of business, quality management and knowledge management processes

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.

Open access
Implementation of Statistical Process Control (SPC) in the Sewing Section of Garment Industry for Quality Improvement

Abstract

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.

Open access
Professional Roles as the Structural Component of Professional Identity of Higher Education Teachers in Samples of Riga and Smolensk

Abstract

The strengthening of professional identity (PI) of teachers of higher education institutions (HEI) is one of the ways to improve the quality of educational process. Performance of professional role(s) can be identified as the key component of PI. The contemporary university teacher performs many professional roles: she/he is a lecturer, researcher, supervisor of students’ research works, expert, and so on. Multi-role activity of a teacher is considered as a characteristic feature of the profession by the colleagues in Latvia, Russia and other countries. This research is based on the data obtained during the implementation of the Project ‘Professional Identity of Contemporary Pedagogue’ in 2014–2016 by the researchers from Riga (Latvia) and Smolensk (Russia). In the realization of the project, the six-component structural model of the content of HEI teacher’s PI was created and the survey was carried out using the questionnaire ‘HEI Teachers’ Professional Identity’ developed by the project participants. Overall, a total of 198 teachers were surveyed in Riga and Smolensk. The aim of this article was to analyze and compare the data obtained for the PI component ‘Professional Roles’ in the samples of HEI teachers of both the countries. The data were analysed using statistical methods. The results showed that teachers of both the countries perform their professional roles at a high level. Overall, the answers of teachers of the two countries were well agreed. However, some peculiarities in the data of Riga and Smolensk were observed, and some problems of PI of HEI teachers were identified, which require attention of executives of the education reform and teachers.

Open access
Comparison of PCR-DGGE and Nested-PCR-DGGE Approach for Ammonia Oxidizers Monitoring in Membrane Bioreactors’ Activated Sludge

Abstract

Nitritation, the first stage of ammonia removal process is known to be limiting for total process performance. Ammonia oxidizing bacteria (AOB) which perform this process are obligatory activated sludge habitants, a mixture consisting of Bacteria, Protozoa and Metazoa used for biological wastewater treatment. Due to this fact they are an interesting bacterial group, from both the technological and ecological point of view. AOB changeability and biodiversity analyses both in wastewater treatment plants and lab-scale reactors are performed on the basis of 16S rRNA gene sequences using PCR-DGGE (Polymerase Chain Reaction – Denaturing Gradient Gel Electrophoresis) as a molecular biology tool. AOB researches are usually led with nested PCR. Because the application of nested PCR is laborious and time consuming, we have attempted to check the possibility of using only first PCR round to obtain DGGE fingerprinting of microbial communities. In this work we are comparing the nested and non-nested PCR-DGGE monitoring of an AOB community and presenting advantages and disadvantages of both methods used. The experiment revealed that PCR technique is a very sensitive tool for the amplification of even a minute amount of DNA sample. But in the case of nested-PCR, the sensitivity is higher and the template amount could be even smaller. The nested PCR-DGGE seems to be a better tool for AOB community monitoring and complexity research in activated sludge, despite shorter fragments of DNA amplification which seems to be a disadvantage in the case of bacteria identification. It is recommended that the sort of analysis approach should be chosen according to the aim of the study: nested-PCR-DGGE for community complexity analysis, while PCR-DGGE for identification of the dominant bacteria.

Open access