Wyniki wyszukiwania - BazTech

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Field Measurements and Machine Learning Algorithms to Monitor Water Quality in Lakes Located in Landscape Parks – A Case Study

Walczak Natalia, Walczak Zbigniew, Laks Ireneusz

Journal of Ecological Engineering

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2024

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Vol. 25, nr 1

49--64

EN

One of the greatest threats to many lakes is their accelerated eutrophication resulting from anthropogenic pressure, agricultural intensification, and climate change. A very important element of surface water protection in environmentally conserved areas is the proper monitoring of water quality and detection of potential threats by examining the physicochemical properties of water and performing statistical analyses that enable possible exposure of unfavourable trends. The article presents the analyses of the results of measurements made in three lakes located in the Sierakowski Landscape Park. As part of the measurements, water quality indicators i.e., phosphorus, nitrogen, BOD5 and COD, were determined monthly for a year at the inflows and outflows of the studied lakes. The test results of selected water quality indicators were analysed using machine learning algorithms i.e., PCA and k-means. The conducted tests enabled statistical estimation of changes in water quality indicators in the reservoirs and evaluation of their correlation.

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A survey of applications of the Kruskal Wallis test in wind power generation

Mbuli Nhlanhla, Diya Mthobisi

Przegląd Elektrotechniczny

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2023

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R. 99, nr 4

140--144

EN

The authors present the results of a survey on the use of the Kruskal Wallis test in wind power generation research. An overall assessment of the qualifying publications suggested that they could be categorized into 4 logical application areas. The time series of the annual number of publications indicated a steady trend in the numbers produced annually and most publications were in the category of environmental issues. The survey contributes to the body of knowledge on wind power generation and also creates a depository of references in one source.

PL

e. Autorzy przedstawiają wyniki ankiety dotyczącej wykorzystania testu Kruskala Wallisa w badaniach energetyki wiatrowej. Ogólna ocena kwalifikujących się publikacji sugeruje, że można je podzielić na 4 logiczne obszary zastosowań. Szeregi czasowe rocznej liczby publikacji wskazywały na stały trend w liczbach wydawanych rocznie, a większość publikacji dotyczyła kwestii środowiskowych. Ankieta wzbogaca wiedzę o energetyce wiatrowej, a także tworzy depozyt referencji w jednym źródle.

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Influence of technology on regional brands in Czechia

Stoklasa Michal

Engineering Management in Production and Services

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2019

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Vol. 11, no. 4

92--102

EN

This article aims to examine the effects of new technology on the purchase of regional brands in Czechia and draw conclusions that will help to adapt the brands to customer needs. Regional brands are a speciality of Central Europe, which emerged due to consumer dissatisfaction with low-quality of global retail products. These traditional local handmade products are heavily influenced by new technology and customers requiring them to be purchasable online with a massive online presence. The sample consisted of 1050 residents of the Czech Republic. The data were gathered by a professional marketing agency Ipsos using a questionnaire survey. The sample was tested using the one-way Chi-square test, which had good compliance to test the basic sample characteristics, followed with the one-sample Kolmogorov-Smirnov test to test the data distribution, and then, the dependencies were tested with the Kruskal-Wallis test. Finally, a post-hoc test suitable for the type of analysis could be chosen to better understand the type of factors that could influence the results and their possible effect. The main findings indicate a slow change in the demand as customers are neutral in relation to regional brands available from online shops as well as their about social media presence but require them to have a good-quality website. Solutions are proposed using a government-run brand with a platform providing web layouts and hybrid e-shop. The type of content is proposed, indicating the appropriate execution, which should be done based on the researched-derived segmentation criteria.

4

Analysis of Temperatures in the Cold Storage of Finished Products

Bogdanovská Gabriela, Stehlíková Beáta, Kačur Ján

Advances in Science and Technology. Research Journal

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2019

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Vol. 13, no 3

54--66

EN

The analysis of temperatures in the cold store of finished products was performed due to the occurrence of temperature fluctuations. The analysis in the report was conducted using Kruskal-Wallis test, Bartlett test, Nemenyi’s test Statistical analysis of measured values in individual months. The relationship between the temperature in the cold store and the outside air temperature was investigated. Quality tools were also used in the thesis. The causes of temperature fluctuations were determined by Cause-Effect diagnostics. The relationship between the main causes was analyzed with Relation Diagram. Corrective measures were then determined to minimize the temperature fluctuations in the cold store.

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Innovativeness - does the territorial typology matters?

Krakowiak-Bal A., Burg P., Ziemiańczyk U., Trávníček P., Junga P., Vítěz T.

Infrastruktura i Ekologia Terenów Wiejskich

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2016

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nr IV/4

1937--1945

EN

National and regional strategies and policies on innovation have been prioritized and innovation is now core to most EU funds and strategies. However, regions are not (should not be) alike in terms of innovation and innovation policy. The development strategies based on innovativeness ideas must include specific local conditions. Effective actions and efforts, to create good environment for innovativeness must bring tangible results. The aim of the paper is comparison of innovativeness on different regions types according to territorial typology: rural, intermediate and urban. The research questions are: Does innovativeness depends on regional typology: urban-rural? Do remote, less developed rural areas have also low achievements (poor performance) in this regard? Innovation output is measured using its hard result, which is number of patent application per capita. To examine group differences according to the innovativeness, the Kruskal-Wallis test was conducted. The test statistic showed, that there is no statistically significant difference between patent applications on different regions types. It has been found that the highest variable value in the whole sample has been calculated in rural group, for rural regions in Switzerland.