Anna Słysz, Piotr Haładziński and Piotr Kaczmarek
The purpose of this study was to investigate the relationship between the elements of psychotherapists’ informal education and features of concept maps reflecting the properties…
Abstract
Purpose
The purpose of this study was to investigate the relationship between the elements of psychotherapists’ informal education and features of concept maps reflecting the properties of thinking structure.
Design/methodology/approach
To study the structure of professional thinking, a complex diagnostic task (computer-aided conceptual mapping task) was used. The diagnostic task consisted of categorising the client’s statements, presenting relations between the categories and concept maps accounting for problems reported by the client and contributing factors and links between them.
Findings
The obtained results showed that self-education, through participation in scientific conferences and attending training courses, was significantly associated with the number of perceived causal relationships between categories and the number of perceived reciprocal links between conceptual categories.
Originality/value
This research show factors which may contribute to more reliable case conceptualisation in psychotherapy. The method used to measure integrative complexity was original.
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This volume of Progress in International Business Research comprises of a selection of 12 competitive papers from the 34th EIBA (European International Business Academy) annual…
Abstract
This volume of Progress in International Business Research comprises of a selection of 12 competitive papers from the 34th EIBA (European International Business Academy) annual conference, which was held in Tallinn, Estonia in December 2008 with the theme “International Business and the Catching-up Economies: Challenges and Opportunities”. It addresses two main issues – (1) the internationalization process and (2) the role of knowledge and innovation for internationalization – that are important in the current economic slowdown both for catching-up and for other economies, scholars, and practitioners.
Ewa Klimiec, Piotr Zachariasz, Halina Kaczmarek, Bogusław Królikowski and Sławomir Mackiewicz
This paper aims to present the details of isotactic polypropylene (it-PP) films with a cellular structure (air-cavities) dedicated to pressure sensors. The polymer composites…
Abstract
Purpose
This paper aims to present the details of isotactic polypropylene (it-PP) films with a cellular structure (air-cavities) dedicated to pressure sensors. The polymer composites (thin films enriched with 5 and 10 wt% of mineral fillers as Sillikolloid P 87 and glass beads) should exhibit suitable structural elasticity within specific stress ranges. After the deformation force is removed, the sensor material must completely restore its original shape and size.
Design/methodology/approach
Estimating the stiffness tensor element (C33) for polymer films (nonpolar space-charge electrets) by broadband resonance ultrasound spectroscopy is a relatively simple method of determining the safe stress range generated in thin pressure sensors. Therefore, ultrasonic and piezoelectric studies were carried out on four composite it-PP films. First, the longitudinal velocity (vL) of ultrasonic waves passing through the it-PP film in the z-direction (thickness) was evaluated from the ω-position of mechanical resonance of the so-called insertion loss function. In turn, the d33 coefficient was calculated from accumulated piezoelectric charge density response to mechanical stress.
Findings
Research is at an early stage; however, it can be seen that the mechanical orientation of the it-PP film improves its piezoelectric properties. Moreover, the three-year electric charge stability of the it-PP film seems promising.
Originality/value
Ultrasonic spectroscopy can be successfully handled as a validation method in the small-lot production of polymer films with the air-cavities structure intended for pressure sensors. The structural repeatability of polymer films is strongly related to a homogeneous distribution of the electric charge on the electret surface.
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Kazimierz Drabczyk, Jaroslaw Domaradzki, Piotr Panek and Danuta Kaczmarek
The purpose of this paper was the investigation of transparent conducting oxide (TCO) applied as an additional part of front metal electrode of crystalline silicon solar cell…
Abstract
Purpose
The purpose of this paper was the investigation of transparent conducting oxide (TCO) applied as an additional part of front metal electrode of crystalline silicon solar cell. Transparent conducting oxides are widely used as counter electrodes in a wide range of electronics and optoelectronics applications, e.g. flat panel displays. The most important optical and electrical requirements for TCOs are high optical transmittance and low resistivity. This low resistivity might invoke the possibility of increasing the distance between the fingers in the solar cell front electrode, thus decreasing the total area covered by metal and decreasing the shadowing loss.
Design/methodology/approach
In the present work, thin films of indium-tin-oxide (ITO) as a transparent counter electrodes, were evaporated on the surface of silicon n+-p junction structures used in solar cells. The influence of the properties of ITO electrode on the electrical performance of prepared solar cells was investigated through optical and electrical measurements. The discussion on the influence of deposition conditions of the TCO films on recombination of the photogenerated electrical charge carriers and solar cell series resistance was also included.
Findings
In this work, the fingers lines 100 μm width were screen-printed on the c-Si wafer with ITO layer. Monocrystalline silicon 25 cm 2,200-μm-thick wafers, were used for this testing. The usefulness of the ITO films as antireflection coating was discussed as well. It is commonly known that electrical performance of solar cells is limited by surface passivation. Despite this, the obtained results for ITO-Si structures showed relatively high value of short circuit current density (Jsc) up to 33 mA/cm2.
Originality/value
Our experiments confirmed the potential of application of ITO as anti-reflection coating (ARC) layer and according to their low resistivity possible use as a functional counter electrodes in photovoltaic structures.
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The purpose of this paper is to contribute to extant literature on socioeconomic transition in Central and Eastern Europe through using a spatial lens in order to address, at the…
Abstract
Purpose
The purpose of this paper is to contribute to extant literature on socioeconomic transition in Central and Eastern Europe through using a spatial lens in order to address, at the level of individual experience, some of the changes that have affected Polish society post‐1989.
Design/methodology/approach
This paper adopts Taylor and Spicer's three‐fold conceptualisation of organizational space as a framework to present and discuss qualitative data collected through interviews.
Findings
This paper finds that socioeconomic restructuring has brought about changes in space conceived of as distance, as materialisation of power relations and as experience. In the narratives of research participants, present experience of space within the city they live and work in is related to their past experience and to their movement in the space. Different spaces are interconnected to form the individual's “mental map” of the city. The spatial dimension of postsocialist transition has an important impact upon the identities of individuals, and an analysis of narratives allows for gaining rich insights into the ambiguities and contradictions involved in evaluating its significance.
Research limitations/implications
An awareness of the link between the transformation of the city and social change contributes to the understanding of postsocialist transition.
Originality/value
By applying a spatial lens to analysis of the processes of social differentiation, as experienced at the micro‐level of individuals, this paper contributes to the literatures on organizational space and postsocialist transition.
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Krzysztof Boroń, Piotr Bratek and Andrzej Kos
The paper aims to present the prototype of a graphical touch screen of thermal signs for the blind.
Abstract
Purpose
The paper aims to present the prototype of a graphical touch screen of thermal signs for the blind.
Design/methodology/approach
The surface of every Peltier pump is a touch point that demands the thermal stabilization. Miniature Peltier modules can work both as heat and cold generators. They are also able to measure the required dot temperature. Graphical screen of thermal signs displays a simple symbol or Brail text. Special computer program was made to control this innovative device. The software enables monitoring the temperature of each Peltier module.
Findings
The experiments carried out with blind people show that they are able to recognize hot and cold dots. Infrared photos of the device have been made using the thermographic MK525 camera.
Originality/value
The paper illustrates that it is possible to display simple graphics by using Peltier micropumps.
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Aimad Koulali, Paweł Ziółkowski, Piotr Radomski, Luciano De Sio, Jacek Zieliński, María Cristina Nevárez Martínez and Dariusz Mikielewicz
In the wake of the COVID-19 pandemics, the demand for innovative and effective methods of bacterial inactivation has become a critical area of research, providing the impetus for…
Abstract
Purpose
In the wake of the COVID-19 pandemics, the demand for innovative and effective methods of bacterial inactivation has become a critical area of research, providing the impetus for this study. The purpose of this research is to analyze the AuNPs-mediated photothermal inactivation of E. coli. Gold nanoparticles irradiated by laser represent a promising technique for combating bacterial infection that combines high-tech and scientific progress. The intermediate aim of the work was to present the calibration of the model with respect to the gold nanorods experiment. The purpose of this work is to study the effect of initial concentration of E. coli bacteria, the design of the chamber and the laser power on heat transfer and inactivation of E. coli bacteria.
Design/methodology/approach
Using the CFD simulation, the work combines three main concepts. 1. The conversion of laser light to heat has been described by a combination of three distinctive approximations: a- Discrete particle integration to take into account every nanoparticle within the system, b- Rayleigh-Drude approximation to determine the scattering and extinction coefficients and c- Lambert–Beer–Bourger law to describe the decrease in laser intensity across the AuNPs. 2. The contribution of the presence of E. coli bacteria to the thermal and fluid-dynamic fields in the microdevice was modeled by single-phase approach by determining the effective thermophysical properties of the water-bacteria mixture. 3. An approach based on a temperature threshold attained at which bacteria will be inactivated, has been used to predict bacterial response to temperature increases.
Findings
The comparison of the thermal fields and temporal temperature changes obtained by the CFD simulation with those obtained experimentally confirms the accuracy of the light-heat conversion model derived from the aforementioned approximations. The results show a linear relationship between maximum temperature and variation in laser power over the range studied, which is in line with previous experimental results. It was also found that the temperature inside the microchamber can exceed 55 °C only when a laser power higher than 0.8 W is used, so bacterial inactivation begins.
Research limitations/implications
The experimental data allows to determinate the concentration of nanoparticles. This parameter is introduced into the mathematical model obtaining the same number of AuNPs. However, this assumption introduces a certain simplification, as in the mathematical model the distribution of nanoparticles is uniform.
Practical implications
This work is directly connected to the use of gold nanoparticles for energy conversion, as well as the field of bacterial inactivation in microfluidic systems such as lab-on-a-chip. Presented mathematical and numerical models can be extended to the entire spectrum of wavelengths with particular use of white light in the inactivation of bacteria.
Originality/value
This work represents a significant advancement in the field, as to the best of the authors’ knowledge, it is the first to employ a single-phase computational fluid dynamics (CFD) approach specifically combined with the thermal inactivation of bacteria. Moreover, this research pioneers the use of a numerical simulation to analyze the temperature threshold of photothermal inactivation of E. coli mediated by gold nanorods (AuNRs). The integration of these methodologies offers a new perspective on optimizing bacterial inactivation techniques, making this study a valuable contribution to both computational modeling and biomedical applications.
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This chapter focuses on the healthy lifestyle desideratum stretching out of the public policy realm to become a business interest in established and emerging economies. It is…
Abstract
Purpose
This chapter focuses on the healthy lifestyle desideratum stretching out of the public policy realm to become a business interest in established and emerging economies. It is argued that retailers, through their marketing and social responsibility strategies, evolve into promoters of a healthy lifestyle at both social and individual levels. The selected examples from Poland illustrate how food retailers, particularly fast-moving consumer goods (FMCG) retailers, respond to the healthy lifestyle desideratum within an emerging economy.
Methodology/approach
A qualitative approach is taken. The role and potential activities of retailers to promote a healthy lifestyle are identified by theoretical studies. Then, retailers’ involvement in developing the ‘health and wellness’ market segment as a market opportunity is justified by analyses of competitive trends in Polish retailing. The marketing and corporate social responsibility (CSR) practices of leading Polish retailers (representatives of different organisational forms) contributing to the development of a healthy lifestyle are presented. Data are drawn from companies’ web pages, interviews, magazines and research agencies.
Findings
Recent experience in Poland confirms the finding from previous research that the retail sector in emerging economies is rapidly progressing towards catching up with well-established practices in developed countries. On the demand side, this process is fostered by the rise of middle-class consumers, while on the supply side, the key driver is the fierce competition among international chains and domestic distributors.
Practical implications
Examples drawn from Polish retailing represent good business practices, the relevance of which stretches beyond their local context and renders these business practices shareable.
Social implications
Awareness is raised of the importance of progressing towards a healthy lifestyle; pragmatic advice is provided on how retailers from an emerging economy can enable changes in consumers’ behaviour.
Originality/value
The business focus on healthy lifestyle development fills a knowledge gap since health science perspectives still prevail in mainstream research on the topic.