Tomasz Grzywacz, Jan Sikora and Stefan Wójtowicz
The purpose of this paper is to introduce a method for increasing imaging quality in impedance tomography. The paper presents an optical method of shape virtualization, processing…
Abstract
Purpose
The purpose of this paper is to introduce a method for increasing imaging quality in impedance tomography. The paper presents an optical method of shape virtualization, processing algorithm draft and results of virtualization for sample objects.
Design/methodology/approach
In impedance tomography the image reconstruction algorithms must yield accurate images of impedance changes. One of the keys to producing an accurate reconstructed image is the inclusion of prior information regarding the physical geometry of the object. When the object under investigation is filled with transparent medium, optical methods can provide information about its interior and estimate the shape of non‐transparent interjections. Computer graphics methods (e.g. ray tracing) can be used to simulate propagation of the light transmitted along straight lines within the object, and thus yield geometric data to better imaging. The process of setting up boundary conditions is then supplied with additional information about interior of the object, which can significantly improve solution of the forward problem in impedance tomography.
Findings
The visibility matrix includes information about the interior of the object. However, the information is incomplete since the scanning is done along one axis. In order to obtain all remaining data, scanning along three axes is required. On the basis of the visibility matrix, the shape and volume of the non‐transparent interjections are recovered and then estimated.
Originality/value
The biggest novelty is indeed the combination of methods used in optical tomography with those in impedance tomography.
Details
Keywords
Stanislaw Osowski, Krzysztof Siwek and Tomasz Grzywacz
The paper is concerned with exploration of sensor signals in differential electronic nose. It is a special type of nose, which applies double sensor matrices and exploits only…
Abstract
Purpose
The paper is concerned with exploration of sensor signals in differential electronic nose. It is a special type of nose, which applies double sensor matrices and exploits only their differential signals, which are used in recognition of patterns associated with them. The purpose of this paper is to study the application of differential nose in dynamic measurement of aroma of 11 brands of cigarettes.
Design/methodology/approach
The most important task in pattern recognition using electronic nose is its resistance to the noise corrupting the measurement. The authors will analyze and compare the performance of the nose in the noisy environment by applying two classifier systems: the support vector machine (SVM) and random forest (RF) of decision trees.
Findings
On the basis of numerical experiments the authors have found that application of SVM as the classifier in the electronic nose is more advantageous than RF, especially at high level of noise and small number of measuring sensors. Its application allowed to recognize 11 brands of cigarettes with the accuracy close to 100 percent.
Practical implications
Thanks to application of two identical sensors working in a differential mode the authors avoid the baseline estimation and thus the solution is well suited for on-line dynamic measurements of the process.
Originality/value
The paper has studied the advantages and limitations of the differential electronic nose following from the existence of the noise, corrupting the measurements. It has pointed an important role of the applied classifier system in getting the electronic nose of the highest quality.
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Tomasz Chady, Ryszard Sikora, Mariusz Szwagiel, Bogdan Grzywacz, Leszek Misztal, Pawel Waszczuk, Michal Szydlowski and Barbara Szymanik
The purpose of this paper is to describe a multisource system for nondestructive inspection of welded elements exploited in aircraft industry developed in West Pomeranian…
Abstract
Purpose
The purpose of this paper is to describe a multisource system for nondestructive inspection of welded elements exploited in aircraft industry developed in West Pomeranian University of Technology, Szczecin in the frame of CASELOT project. The system task is to support the operator in flaws identification of welded aircraft elements using data obtained from X-ray inspection and 3D triangulation laser scanners.
Design/methodology/approach
For proper defects detection a set of special processing algorithms were developed. For easier system exploitation and integration of all components a user friendly interface in LabVIEW environment was designed.
Findings
It is possible to create the fully independent, intelligent system for welds’ flaws detection. This kind of technology might be crucial in further development of aircraft industry.
Originality/value
In this paper a number of innovative solutions (new algorithms, algorithms’ combinations) for defects’ detection in welds are presented. All of these solutions are the basis of presented complete system. One of the main original solution is a combination of the systems based on 3D triangulation laser scanner and X-ray testing.
Details
Keywords
Michal Polasik and Tomasz Piotr Wisniewski
This paper seeks to identify empirically the factors underlying the decision to adopt online banking in Poland.
Abstract
Purpose
This paper seeks to identify empirically the factors underlying the decision to adopt online banking in Poland.
Design/methodology/approach
The sample used in this study is based on 3,519 interactive questionnaires completed by Polish internet users. The dichotomous decision of whether to adopt internet banking services was linked, via Binomial Logistic Regression, to numerous explanatory variables.
Findings
Generally, the behaviour of Polish internet users and that of consumers in more developed countries exhibit similar traits. One of the dominant relationships that has been observed in our study is the link between the decision to open an online account and the perceived level of security of internet transactions. Experience with the medium of internet and certain demographic variables also proved to be robust predictors of the adoption status. Moreover, this inquiry documents that advertising appears to be efficacious and that online banking interacts with consumption of other products offered by banks. These findings imply that financial institutions can encourage customers to use this cost‐effective distribution channel through carefully‐planned actions.
Practical implications
The results presented in this paper can be of assistance to banks that either operate in Poland or intend to design a pan‐European strategy. Useful insights are also provided with regard to market segmentation, security and strategies fostering the acceptance of online banking.
Originality/value
The analysis is based on a large sample and broadens our understanding of the attitudes towards innovative financial products by considering factors rarely discussed in prior literature.