With Scholarship & Practice in Mind: The Case Study as Research Method

Unlike theoretical scholars who seek knowledge to expand humanity’s (or their) understanding of a topic, scholar practitioners seek knowledge that can be applied to understand change or create change in a specific phenomenon. Although many of the same research methods can be used by both groups of educational scholars, and although research designs are determined in large part by the research questions being asked, several research methods can prove most useful for scholar practitioners examining learning environments. One, the case study, stands out as perhaps the most versatile and researcher-friendly, though. A case study, bounded by specific location and topic parameters, can allow solid evaluation of the workings of a program or teaching method. It can also allow consideration of specific needs to address an educational situation. This article briefly discusses the nature and purpose of different types of research, then focuses on the nature and usefulness of the case study methodology

On chaos behaviour of nonlinear Lasota equation in Lebesgue space

We concern the asymptotic behaviour of the dynamical systems induced by nonlinear Lasota equation. We study chaoticity in the sense of Devaney and strong stability of the system. In many articles authors consider the properties of the linear version of the equation. By the construction of the operator in the separable space, we can formulate the relations between the solutions of the linear equation and its nonlinear version in Lebesgue space. The aim of the paper is to present the detailed construction of the operator thanks to which, the study of simple relationships allows determining the chaotic behaviour of the nonlinear equation

On periodic and stable solutions of the Lasota equation in different phase spaces

We study properties of the Lasota partial differential equation in two different spaces: $V_{\alpha}$ (Hölder continuous functions) and $L^p$. The aim of this paper is to generalize the results of [Z. Brzeźniak, A. L. Dawidowicz, On the periodic solution to the von Foerster-Lasota equation, to appear in Semigroup Forum]

Customer Satisfaction in the Field of Comprehensive Service of Refrigerated Containers in Seaports

The article analyzes the issues concerning customer satisfaction survey with the complexity of handling refrigerated containers at the seaports' container terminals. It aims to determine the criteria to evaluate the port comprehensive service and to examine the opinion of chosen seaports terminals on customer satisfaction with the complexity of handling refrigerated containers. Evaluation criteria of comprehensive service of refrigerated containers in seaports were identified and examined. The analysis of ports opinions on customer satisfaction with the service of refrigerated containers was based on surveys, which covered 5 container terminals located in the Polish cities of Gdansk, Gdynia and Szczecin. The research revealed that according to the ports, complex service primarily affects the high-level customer satisfaction and shorter service time, while implementation of this service regards a good level of customer service and price

Land Administration Systems Development Trends – A Case Study

Land management is aimed at generating optimal social, economic and environmental benefits while promoting sustainable development principles. An essential element of this process is the knowledge of the geospatial situation to support public decision-making at different levels: local, regional, national and global. Hence, there is a need for rapid access to complete and updated information about the physical characteristics of a property, rights, restrictions, responsibilities and interrelations. This information is provided by land administration systems (LAS). LAS are built and maintained by governments. The core of LAS is a multi-purpose cadastral system integrated with other spatial information systems and public registers. In this paper, the authors present the functional architecture and the assumptions of land administration systems built in Poland and Germany. The analysis results show the specificity of the systems' design in relation to socio-economic condition

SHORT STATIC GPS/GLONASS OBSERVATION PROCESSING IN THE CONTEXT OF ANTENNA PHASE CENTER VARIATION PROBLEM

So far, three methods have been developed to determine GNSS antenna phase center variations (PCV). For this reason, and because of some problems in introducing absolute models, there are presently three models of PCV receiver antennas (relative, absolute converted and absolute) and two satellite antennas (standard and absolute). Additionally, when simultaneously processing observations from different positioning systems (e.g. GPS and GLONASS), we can expect a further complication resulting from the different structure of signals and differences in satellite constellations. This paper aims at studying the height differences in short static GPS/GLONASS observation processing when different calibration models are used. The analysis was done using 3 days of GNSS data, collected with three different receivers and antennas, divided by half hour observation sessions. The results show that switching between relative and absolute PCV models may have a visible effect on height determination, particularly in high accuracy applications. The problem is especially important when mixed GPS/GLONASS observations are processed. The update of receiver antenna calibrations model from relative to absolute in our study (using LEIAT504GG, JAV_GRANT-G3T and TPSHIPER_PLUS antennas) induces a jump (depending on the measurement session) in the vertical component within to 1.3 cm (GPS-only solutions) or within 1.9 cm (GPS/GLONASS solutions)

The Effect of Selected Cultivation Factors on the Growth of Mycelium of Pleurotus cystidiosus Miller

Pleurotus cystidiosus occurs in natural areas in North America. Its carpophores are characterized by a slightly sweet and mild taste. Fruiting bodies of P. cystidiosus are valued as source of nutrients and biologically active substances. The aim of the study was the selection of the optimal incubation temperature and the best substrate for the fastest mycelium growth. Two cultivars of P. cystidiosus – B1 and B122 was taken. Incubation of mycelium was performed in the temperature range from 15 to 30 °C. The influence of a substrate made of wheat straw, hemp shives and energetic grasses – Panicum virgatum and Miscanthus × giganteus. The experiment compared the growth of mycelium on a substrate with wheat straw (control sample) and with wheat straw and the addition of hemp shives and energetic grass in increasing amounts: 10, 20 and 30%. It has been shown that the growth of mycelium of tested strains on different substrates varied. The best growth of mycelium occurred on the substrate with wheat straw and the addition of hemp shives, P. virgatum and M. × giganteus in the amounts of 20% and 30%. The temperature of incubation also had a significant impact on the growth of the mycelium of P. cystidiosus. The optimal temperature was 25 °C. An investigation of the mutual dependence between morphological and qualitative characteristics of the type of agar medium allows optimization of the production of P. cystidiosus. The development of a low-cost and simple method for the production of P. cystidiosus can contribute to the introduction of this species into intensive cultivation. Use of waste materials in mushroom production will significantly increase the profitability of crops and reduce their costs

A convenient ready-to-use algorithm for a conditional quantile estimator

Abstract: This paper contains a complete procedure for calculating the value of a conditional quantile estimator. The concept is based on the nonparametric kernel estimator method, which frees the algorithm from the random variables ’ distributions. The procedure was worked out in a ready-to-use form – specific formulas for functions and the parameter used were given. The practical implementation of this method is very simple, and its computational complexity is linear with respect to random sample size as well as the dimension of conditioning variable. Thanks to a clear, near intuitive interpretation it can easily be modified or generalized depending on the individual needs of atypical applications. In particular, conditioning variables can be taken into account, not only continuous (real), but also binary, discrete and categorized, or any of their combinations