Browsing by Subject "COVID-19"

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Aplikacja webowa do akwizycji i wizualizacji danych epidemiologicznych z mediów społecznościowych na przykładzie Twittera Ministerstwa Zdrowia
(Data obrony: 2021-01-28) Stryczek, Karol
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej
Access status: Open Access ,
Applying Hunger Game Search (HGS) for selecting significant blood indicators for early prediction of ICU COVID-19 severity
(Wydawnictwa AGH, 2023) Sayed, Safynaz AbdEl-Fattah; ElKorany, Abeer; Sayed, Sabah
This paper introduces an early prognostic model for attempting to predict the severity of patients for ICU admission and detect the most significant features that affect the prediction process using clinical blood data. The proposed model predicts ICU admission for high-severity patients during the first two hours of hospital admission, which would help assist clinicians in decision-making and enable the efficient use of hospital resources. The Hunger Game search (HGS) meta-heuristic algorithm and a support vector machine (SVM) have been integrated to build the proposed prediction model. Furthermore, these have been used for selecting the most informative features from blood test data. Experiments have shown that using HGS for selecting features with the SVM classifier achieved excellent results as compared with four other meta-heuristic algorithms. The model that used the features that were selected by the HGS algorithm accomplished the topmost results (98.6 and 96.5%) for the best and mean accuracy, respectively, as compared to using all of the features that were selected by other popular optimization algorithms.
Access status: Open Access ,
COVID-19 and instagram: an analysis of an Ibero-American infodemic
(Wydawnictwa AGH, 2022) Renó, Denis Porto; Martinez-Rolan, Xabier; Piñeiro-Otero, Teresa; Versuti, Andrea
Understanding the role of communication promoted by Ibero-American society during the Coronavirus pandemic is fundamental for building knowledge about the disease. In this scenario, Instagram occupies a privileged place, as it carries a diversity of possible languages. Furthermore, Instagram’s relevance in the social media landscape is growing. This article presents, from a study developed through big data analysis procedures, the first result of several that make up an international investigation on the subject. In the project stage, the quantitative volume of publications, the average publication per user and the participation of the different languages used in this analysis group were verified. It is hoped that further investigations can be developed based on the results presented here, especially due to the urgency of knowing the role of communication in the pandemic scenario in which we live.
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Development of method for evaluation of the proper usage of protective masks
(Data obrony: 2021-01-28) Machałek, Agata
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej
Access status: Open Access ,
Expiration day effects of stock and index futures on the Warsaw Stock Exchange before and in the initial phase of the COVID-19 pandemic
(Wydawnictwa AGH, 2023) Suliga, Milena
This paper examines the existence of expiration day effects of stock and index derivatives on the Warsaw Stock Exchange. Event study analysis is employed to high-frequency data to check the occurrence of four types of anomalies: abnormal increase in trading volume and in intraday volatility of underlying stocks, price reversal and price shock. The study confirms that on expi- ration days trading volume of underlying stocks increase unusually during the time when final settlement prices of expiring futures are being calculated. Intraday volatility of stock prices is also abnormally high on expiration days. However, before 2020 this price effect occurred on expiration days during triple withing hour, while in the initial phase of COVID-19 pandemic it has been visible on expiration days only at the close and additionally at the beginning of the next trading session. The analysis of price reversal and price shock effects revealed that only the second anomaly is a phenomenon which constantly appears after futures expiration, indicating the distortion of stock prices on expiration days and their return to normal levels at the beginning of the next trading session. Division of the research period (2018-2020) into two parts allow to find out that after the outbreak of the pandemic, when the importance of hedgers’ activity on the futures market have increased, some of the analyzed anomalies have weakened and their duration have been shortened. However, distortions of underlying stock prices have been still visible at the close of the trading session on expiration days. This suggests that as long as the final settlement prices of stock future are equal to closing prices of underlying stocks, expiration day effects will occur on the WSE.
Access status: Open Access ,
Google Trends as indicator of social preferences: causality and intervention in Poland’s housing market
(Wydawnictwa AGH, 2026) Bełej, Mirosław
The article’s primary purpose was to explore the potential of Internet searches for keywords that were related to the polish housing market in order to understand the public’s current preferences or reactions to changes in the market environment. The research used data that was downloaded from Google Trend (RSV) from 2010 through 2024. The Granger causality test was then applied to the relationship between RSV and housing prices, and a Bayesian structural time-series model was applied to examine the impact of the external intervention (COVID-19) on the RSV dynamics. The results indicated that significant changes in the market environment could influence fluctuations in interest in housing, as was evidenced by the changes in the online searches. The article respectfully suggests that a more nuanced understanding of market dynamics might be achieved through a thoughtful integration of classical economic data with non-classical Internet data.
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Modeling of the COVID-19 virus spread in Poland
(Data obrony: 2021-01-28) Kwiek, Patrycja
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej
Access status: Open Access ,
Organizational Agility in Time of Uncertainty on Example of Game Industry Enterprises in Poland
(Wydawnictwa AGH, 2023) Żak, Katarzyna
The COVID-19 pandemic made the world of science and business turn its attention to the turbulence of the environment in which enterprises operate. Uncertainty, high dynamics of changes and the complexity of the business environment make it increasingly difficult to find the right recipe for success. The solution that many entities reach for is agility. Agility is the ability to deal with volatility and uncertainty. Agile enterprises build their success on resource flexibility and the ability to adapt to changes. Based on the literature on the subject, the paper presents selected definitions of agility and indicates the features of an agile organization. Due to the pandemic situation, many sectors and businesses are facing a serious crisis. The game industry is one of few exceptions because forced stay at home due to lockdown increased the interest in games as a form of spending time both among adults (increase by 31%) and children (increase by 39%). Selected characteristics of the game industry enterprises in Poland in 2020 are presented in this context. In many cases, they undoubtedly perform excellent in the pandemic reality. Due to their financial results and the implemented business practices – they are an example of agile organizations.
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Pandemia COVID-19 a działalność organizacji studenckich na przykładzie Uczelnianej Rady Samorządu Studentów AGH
(Data obrony: 2020-12-11) Sroka, Katarzyna
Wydział Humanistyczny
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Społeczno-ekonomiczny wpływ chorób pandemicznych na przemysł Naftowy, ze szczególnym uwzględnieniem krajów rozwijających się
(Data obrony: 2021-01-25) Oliveira, Rene
Wydział Wiertnictwa, Nafty i Gazu
Access status: Open Access ,
The explosive growth of social media: Trump, COVID-19, the Russian invasion of Ukraine, and Elon Musk
(Wydawnictwa AGH, 2022) Levinson, Paul
Social media have arisen to become the world’s go-to mode of communication in an astonishing fifteen years. In the past few years, social media themselves have been shaken by Donald Trump’s use of Twitter, and by deceptive reporting about many crucial aspects of the COVID-19 pandemic. And now, in just the past few months, the Russian invasion of Ukraine has put social media to the test, with an informational war being fought alongside the physical war, and billionaire Elon Musk’s attempt to buy Twitter perhaps ending any attempt to limit deceptive posts that jeopardize human lives. This essay examines what is happening.
Access status: Open Access ,
The impact of COVID-19 on the global renewable energy sector. An integrative review exploring the challenges and emerging opportunities
(Wydawnictwa AGH, 2025) Parihar, Jaya Singh; Gupta, Mansi; Sharma, Gagan Deep
The shift from traditional fossil fuel energy to cleaner, renewable energy has the potential to help achieve long-term sustainability goals. The COVID-19 pandemic has had a significant impact on the renewable energy sector. This study aims to provide an integrative review of the global impacts and challenges of the COVID-19 pandemic on the renewable energy sector and highlight the energy-related lessons and emerging opportunities by capturing the main trends in the field. First, the integrative review identifies five themes. Second, the study identifies the aspects of renewable energy that are influenced by the COVID-19 pandemic. Third, the study proposes a conceptual framework highlighting the impacts and challenges of the COVID-19 pandemic on renewable energy demand and consumption patterns, and these results are further supported by the aggregate dimensions identified through inductive analysis. The three main energy challenges are: the healthcare sector primarily dealing with disease control; associated environmental impacts with challenges relating to fluctuating and uncertain energy demand and consumption, structural and pattern changes, greenhouse gas emissions, local air quality, energy transmission infrastructure, and oil production and transmission network; associated economic impact dealing with industrial activities including households, agriculture, public and commercial sector, energy import/ export, sales revenue and expenditure, social sector factors, funding schemes, and subsidies, technology R&D, and overall economic welfare. The study also makes theoretical and practical propositions for researchers and policymakers.
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Wpływ Covid-19 na działalność firm logistycznych i spedycyjnych. Analiza rynku logistycznego w Polsce
(Data obrony: 2020-12-17) Krogulec, Mateusz
Wydział Zarządzania
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Wpływ pandemii COVID-19 na krakowski rynek nieruchomości
(Data obrony: 2021-01-19) Żabówka, Rafał
Wydział Geodezji Górniczej i Inżynierii Środowiska
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Wyznaczenie optymalnej lokalizacji szpitala zakaźnego w obliczu pandemii COVID-19.
(Data obrony: 2021-01-20) Lodzińska, Karolina
Wydział Geodezji Górniczej i Inżynierii Środowiska