Wyniki wyszukiwania - BazTech

1

Equivalence of low-cost PM10 concentration measuring devices with a reference method using various correction functions

Owczarek Tomasz, Rogulski Mariusz, Czechowski Piotr O., Badyda Artur, Czermański Ernest

Economics and Environment

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2023

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No. 4

1--22

EN

The aim of the study was to build a corrective model that can be used in the analysed devices and to assess the impact of such a model on the values of the measured concentrations. The novelty of this study is the test of equivalence with the equivalent reference method for hourly data. The study used hourly data of PM10 concentrations measured in a chosen city in Poland. Data was collected from two PM10 sensors and a reference device placed in close proximity. In addition, air temperature, humidity and wind speed were also measured. Among the tested models, a linear model was selected that used primary measurements of PM10, temperature, air velocity, and humidity as the most accurate approximation of the actual PM10 concentration level. The results of the analysis showed that it is possible to build mathematical models that effectively convert PM10 concentration data from tested low-cost electronic measuring devices to concentrations obtained by the reference method.

PL

Celem badań było zbudowanie modelu korekcyjnego, który można zastosować w analizowanych urządzeniach oraz ocena wpływu takiego modelu na wartości mierzonych stężeń. Nowością w pracy jest test równoważności z równoważną metodą referencyjną dla danych godzinowych. W pracy wykorzystano dane godzinowe stężeń pyłu PM10 zmierzonych w wybranym mieście w Polsce. Dane były zbierane z dwóch czujników PM10 i urządzenia referencyjnego umieszczonych w bliskiej odległości. Dodatkowo mierzono również temperaturę powietrza, wilgotność i prędkość wiatru. Spośród testowanych modeli wybrano model liniowy, który wykorzystując pierwotne pomiary PM10, temperatury, prędkości powietrza i wilgotności, najdokładniej przybliżał rzeczywisty poziom stężenia PM10. Wyniki analizy wykazały, że możliwe jest zbudowanie modeli matematycznych, które skutecznie przeliczają dane o stężeniach PM10 z badanych tanich elektronicznych urządzeń pomiarowych na stężenia uzyskane metodą referencyjną.

2

The study of the interdependencies of areas and aspects of smart city in Polish cities

Owczarek Tomasz, Sojda Adam, Wolny Maciej

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2022

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z. 161

203--214

EN

Purpose: To determine the interdependencies between Smart City areas as well as the aspects and areas between resident-oriented IT areas of the city. Design / methodology / approach: The data for the study was collected during a survey of 287 cities for Smart City. The study of interdependence was based on a correlation analysis using: Pearson's correlation coefficient, Cramér's V coefficient, and Kendall's tau. In addition, a PCA analysis was used to reduce variable dimensions. Findings: The results of the research indicate that the scope of using services within e-office services is more strongly related to functionality than to IT equipment. In turn, the economic area plays a fundamental role in the perception of the city as a Smart City. There was also a clear difference in self-evaluation regarding Smart City areas and IT aspects of the city depending on the size of the city. However, this difference does not translate into declarations regarding the readiness for evaluation in Smart City categories. Originality/value: presentation of the relationship between the areas defining the concept of Smart City dependence on the basis of an original study addressed to city representatives. The results of the study allow us to look at the Smart City concept from the perspective of the city. The results of the analysis, in addition to scientists dealing with Smart City, may be of interest to city managers in Poland. They show the way of understanding and dependencies between individual areas. They also show those dependencies that need to be strengthened in the context of sustainable development.

3

Problematyka badań eksploatacyjnych wyłączników mocy zainstalowanych w rozdzielnicach wysokiego napięcia z izolacją SF6 (GIS) – studium przypadku

Bednarczyk Tomasz, Owczarek Tomasz

Elektro Info

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2022

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nr 6

71--78

PL

Autorzy podjęli temat dotyczący problematyki badań eksploatacyjnych wyłączników mocy zamkniętych w obudowie rozdzielnicy GIS. W pierwszej kolejności przedstawiono ogólną charakterystykę obiektu badań, kolejno zaś zaprezentowano wyniki przeprowadzonych pomiarów wraz z dyskusją.

4

Economic disciplines in the context of the new list of journals - network analysis

Owczarek Tomasz

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2020

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z. 142

7--20

EN

Purpose: The aim of this article is an attempt to characterize economic disciplines, i.e. economics and finance, as well as management and quality studies, based on their assignments to scientific journals, and to identify the place of these two disciplines in relation to each other and their links with other disciplines. Design/methodology/approach: Quantitative and network analysis methods were used for graphical representation and description of the complex relationships. The analysis was based on the data published on 31 July 2019, constituting a list of scientific journals. Findings: The results confirm a strong link between the two disciplines, but they also show some differences between them. The discipline of economics and finance is particularly strongly linked with the discipline of social and economic geography and spatial management. This is not the case for management and quality studies, which is more closely linked to disciplines outside social sciences. Research limitations/implications: The results are based only on a quantitative approach to the relationships between disciplines, therefore, they should not be used to draw too far-reaching conclusions, e.g. on the differences between these two disciplines in methods, subject matter or facilities under analysis. Further research may take into account, for example, different research trends and approaches within the disciplines themselves. Originality/value: Presented network approach shows the connections between scientific disciplines in a new holistic way. The results could be especially interesting for researchers whose studies are interdisciplinary.

5

Verification of equivalence with reference method for measurements of PM10 concentrations using low-cost devices

Owczarek Tomasz, Rogulski Mariusz, Czechowski Piotr O.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2019

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nr 60 (132)

84--89

EN

This study presents an assessment of the equivalence of measurements of particulate matter PM10 concentrations using a low-cost electronic device as compared to the reference method. Data for the study were collected in accordance with the guidelines for research equivalence of the two devices operating in parallel. On this basis, a model correcting raw measurement results was developed. The best results were obtained for the model having the form of a second degree polynomial and taking into account air temperature. Corrected measurement results were used in the equivalence testing procedure. As a result, confirmation of equivalence was obtained for the vast majority of data sets generated from original measurements. This confirms the usefulness of the device as a tool for monitoring air quality.