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  • 1
    Online Resource
    Online Resource
    Thermal stress in the northern Carpathians and air circulation
    Walter de Gruyter GmbH ; 2020
    In:  Miscellanea Geographica Vol. 24, No. 3 ( 2020-07-31), p. 147-160
    Details
    In: Miscellanea Geographica, Walter de Gruyter GmbH, Vol. 24, No. 3 ( 2020-07-31), p. 147-160
    Abstract: In mountain areas, air circulation plays a major role in the forming of the climate. This paper examines how it influences thermal stress in the northern Carpathians. The Niedźwiedź’s classification of air circulation was applied. Thermal stress was assessed by Universal Thermal Climate Index (UTCI). Daily meteorological and circulation data for the period 1986–2015 were used for 20 stations in Poland, Slovakia and Ukraine. Air circulation was found to have a significant impact on thermal stress. The highest UTCI values are observed at Ca+Ka (centre of the high and anticyclonic wedge or ridge of high pressure) and the lowest values at N+NE and W+NW circulation; at the Southward stations, UTCI is higher than in the Northward ones; thermoneutral days are more frequent on the southward than on the northward slopes; during N+NE, E+SE and W+NW circulation and for heat stress days, the greatest thermal privilege of the southward slopes is observed at E+SE, S+SW, Ca+Ka and Cc+Bc (centre of low and through of low pressure) types of circulation.
    Type of Medium: Online Resource
    ISSN: 2084-6118
    URL: Article
    DOI: 10.2478/mgrsd-2020-0022
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 2715618-7
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  • 2
    Online Resource
    Online Resource
    Forecasting Cinema Attendance at the Movie Show Level: Evidence from Poland
    Walter de Gruyter GmbH ; 2020
    In:  Business Systems Research Journal Vol. 11, No. 1 ( 2020-03-01), p. 73-88
    Details
    In: Business Systems Research Journal, Walter de Gruyter GmbH, Vol. 11, No. 1 ( 2020-03-01), p. 73-88
    Abstract: Background: Cinema programmes are set in advance (usually with a weekly frequency), which motivates us to investigate the short-term forecasting of attendance. In the literature on the cinema industry, the issue of attendance forecasting has gained less research attention compared to modelling the aggregate performance of movies. Furthermore, unlike most existing studies, we use data on attendance at the individual show level (179,103 shows) rather than aggregate box office sales. Objectives: In the paper, we evaluate short-term forecasting models of cinema attendance. The main purpose of the study is to find the factors that are useful in forecasting cinema attendance at the individual show level (i.e., the number of tickets sold for a particular movie, time and cinema). Methods/Approach: We apply several linear regression models, estimated for each recursive sample, to produce one-week ahead forecasts of the attendance. We then rank the models based on the out-of-sample fit. Results: The results show that the best performing models are those that include cinema- and region-specific variables, in addition to movie parameters (e.g., genre, age classification) or title popularity. Conclusions: Regression models using a wide set of variables (cinema- and region-specific variables, movie features, title popularity) may be successfully applied for predicting individual cinema shows attendance in Poland.
    Type of Medium: Online Resource
    ISSN: 1847-9375
    URL: Article
    DOI: 10.2478/bsrj-2020-0006
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 2759390-3
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  • 3
    Online Resource
    Online Resource
    Insights on boron impact on structural characteristics in epitaxially grown BGaN
    Springer Science and Business Media LLC ; 2022
    In:  Journal of Materials Science Vol. 57, No. 14 ( 2022-04), p. 7265-7275
    Details
    In: Journal of Materials Science, Springer Science and Business Media LLC, Vol. 57, No. 14 ( 2022-04), p. 7265-7275
    Type of Medium: Online Resource
    ISSN: 0022-2461 , 1573-4803
    URL: Article
    DOI: 10.1007/s10853-022-07085-z
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2015305-3
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  • 4
    Online Resource
    Online Resource
    The influence of thermal stress on the physical and technical activities of soccer players: lessons from the 2018 FIFA World Cup in Russia
    Springer Science and Business Media LLC ; 2021
    In:  International Journal of Biometeorology Vol. 65, No. 8 ( 2021-08), p. 1291-1298
    Details
    In: International Journal of Biometeorology, Springer Science and Business Media LLC, Vol. 65, No. 8 ( 2021-08), p. 1291-1298
    Abstract: The present study attempts to assess changes in soccer players’ physical and technical activity profiles due to thermal stress, measured with the Universal Thermal Climate Index (UTCI), in training centres and during matches of the 2018 FIFA World Cup in Russia. The study also verifies the theoretical models of soccer players’ physiological parameters. The study sample consisted of 945 observations of 340 players of national teams taking part in the World Cup in Russia. The measured variables included physical activities: total distance covered, distances covered with an intensity of 20–25 km/h, number of sprints; technical activities: number of shots, number of passes, pass accuracy and physiological indicators: evaporative water loss and heart rate. In addition, the final ranking places of each national team were also used in the study. The UTCI was calculated based on meteorological data recorded at training centres and during matches. The UTCI records were then classified into two ranges: NTS—no thermal stress (UTCI 9–26 °C) and TS—thermal stress (UTCI 〉  26 °C). Climatic conditions at soccer training centres assessed as involving “no thermal stress” are found to be more beneficial for increasing the total distance covered and the number of sprints performed by players during a match. The theoretical models for determining soccer players’ physiological parameters used in the study reduce the players’ heart rate effort and evaporative water loss, which is in line with findings in studies by other authors. The climatic conditions at soccer training centres and during tournament matches should be taken into account in planning preparations for future World Cup tournaments, especially those in hotter countries.
    Type of Medium: Online Resource
    ISSN: 0020-7128 , 1432-1254
    URL: Article
    DOI: 10.1007/s00484-020-01964-3
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
    detail.hit.zdb_id: 1459227-7
    SSG: 12
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  • 5
    Online Resource
    Online Resource
    Work Function Tunability of Graphene with Thermally Evaporated Rhenium Heptoxide for Transparent Electrode Applications
    Wiley ; 2020
    In:  Advanced Engineering Materials Vol. 22, No. 4 ( 2020-04)
    Details
    In: Advanced Engineering Materials, Wiley, Vol. 22, No. 4 ( 2020-04)
    Abstract: The possibility of efficient work function tuning of high‐quality graphene, grown on 6H‐SiC(0001), by covering it with thermally evaporated rhenium heptoxide (Re 2 O 7 ) is presented. Raman spectroscopy, X‐ray photoelectron spectroscopy, and ultraviolet electron spectroscopy are used for structural, chemical, and electronic characterization of Re 2 O 7 /graphene heterostructures. The deposited oxide does not induce any defects in the high‐quality graphene lattice and results in a relatively small change in optical transmittance. The observed increase in the work function of the Re 2 O 7 /graphene heterostructure (+0.76 eV) emphasizes great potential of modified graphene for use as transparent anode and hole transport layer in organic electronics.
    Type of Medium: Online Resource
    ISSN: 1438-1656 , 1527-2648
    URL: Issue
    URL: Article
    DOI: 10.1002/adem.v22.4
    DOI: 10.1002/adem.201900955
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2016980-2
    detail.hit.zdb_id: 1496512-4
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  • 6
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    Online Resource
    Wpływ zmian klimatu na zmiany zachorowań i zgonów na choroby klimatozależne w Polsce w XXI wieku
    Polish Copernicus Society of Naturalist ; 2022
    In:  Kosmos Vol. 70, No. 4 ( 2022-02-02), p. 597-610
    Details
    In: Kosmos, Polish Copernicus Society of Naturalist, Vol. 70, No. 4 ( 2022-02-02), p. 597-610
    Abstract: Klimat i jego zmiany wpływają na stan zdrowia pojedynczych osób i całych społeczeństw. Problemy zdrowotne wywoływane czynnikami klimatycznymi są określane jako choroby klimatozależne. W Polsce należą do nich infekcje dróg oddechowych, grypa, nowotwory skóry, borelioza i kleszczowe zapalenie mózgu, salmonelloza, problemy krążeniowe oraz zaburzenia układu termoregulacyjnego spowodowane stresem gorąca lub stresem zimna. Na podstawie danych epidemiologicznych oraz klimatycznych za lata 1973-2014 opracowano modele statystyczne wpływu różnych cech klimatu na choroby klimatozależne. W drugim etapie badań dokonano, na podstawie tych modeli, prognozy zachorowań i zgonów na choroby klimatozależne w kolejnych dekadach XXI wieku. Stwierdzono istotne statystycznie wzrosty takich chorób jak: nowotwory skóry, borelioza czy zgony z przyczyn kardiologicznych i związane ze stresem gorąca. Trendy spadkowe wykazują natomiast infekcje grypowe oraz zgony z powodu układu oddechowego.
    Type of Medium: Online Resource
    ISSN: 2658-1132 , 0023-4249
    URL: Article
    DOI: 10.36921/kos.2022_2839
    Language: Unknown
    Publisher: Polish Copernicus Society of Naturalist
    Publication Date: 2022
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  • 7
    Online Resource
    Online Resource
    Grade‐dependent changes in sphingolipid metabolism in clear cell renal cell carcinoma
    Wiley ; 2022
    In:  Journal of Cellular Biochemistry Vol. 123, No. 4 ( 2022-04), p. 819-829
    Details
    In: Journal of Cellular Biochemistry, Wiley, Vol. 123, No. 4 ( 2022-04), p. 819-829
    Abstract: There is a host of evidence for the role of bioactive sphingolipids in cancer biology, and dysregulated sphingolipid metabolism was observed in many malignant tumors. The aim of the present study was to provide more detailed data on sphingolipid metabolism in different stages of clear cell renal cell carcinoma (ccRCC). Samples of the tumor and noncancerous fragments of the same kidney were collected from patients who underwent a radical nephrectomy. The subjects were stratified according to the degree of malignancy of the tumor ( n  = 14 for G2, 12 for G3, and 9 for G4). The content of bioactive sphingolipids/glycosphingolipids was measured with an HPLC and HPTLC method, and the mRNA and protein expression of sphingolipid transporters and metabolizing enzymes was evaluated using real‐time polymerase chain reaction (PCR) and Western blot, respectively. Compared to healthy kidney tissue, ccRCC was characterized by accumulation of sphingosine, sphingosine‐1‐phosphate (S1P), ceramide, dihydrosphingosine, and dihydroceramide. However, in the case of the latter two, the accumulation was limited to higher malignancy grades. In addition, compared to the healthy tissue, the content of gangliosides in the tumor was increased at the expense of globosides. We also found profound grade‐dependent changes in the mRNA level of S1P‐metabolizing enzymes, and spinster homolog 2. In general, their expression was much higher in G2 tumors compared to higher malignancy grades. We conclude that ccRCC is characterized by profound and multilevel alterations in sphingolipid metabolism, which to a large extent are grade‐dependent. We hypothesize that dysregulation of sphingolipid metabolism contributes to the progression of ccRCC.
    Type of Medium: Online Resource
    ISSN: 0730-2312 , 1097-4644
    URL: Issue
    URL: Article
    DOI: 10.1002/jcb.v123.4
    DOI: 10.1002/jcb.30227
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1479976-5
    SSG: 12
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  • 8
    Online Resource
    Online Resource
    Identification of Differential Drive Robot Dynamic Model Parameters
    MDPI AG ; 2023
    In:  Materials Vol. 16, No. 2 ( 2023-01-10), p. 683-
    Details
    In: Materials, MDPI AG, Vol. 16, No. 2 ( 2023-01-10), p. 683-
    Abstract: The paper presents the identification process of the mathematical model parameters of a differential-drive two-wheeled mobile robot. The values of the unknown parameters of the dynamics model were determined by carrying out their identification offline with the Levenberg-Marguardt method and identification online with the Recursive least-squares method. The authors compared the parameters identified by offline and online methods and proposed to support the recursive least squares method with the results obtained by offline identification. The correctness of the identification process of the robot dynamics model parameters, and the operation of the control system was verified by comparing the desired trajectories and those obtained through simulation studies and laboratory tests. Then an analysis of errors defined as the difference between the values of reference position, orientation and velocity, and those obtained from simulations and laboratory tests was carried out. On itd basis, the quality of regulation in the proposed algorithm was determined.
    Type of Medium: Online Resource
    ISSN: 1996-1944
    URL: Article
    DOI: 10.3390/ma16020683
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2487261-1
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  • 9
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    Online Resource
    Trajectory Tracking Control of a Mobile Robot with the ROS System
    Index Copernicus ; 2022
    In:  Problems of Mechatronics Armament Aviation Safety Engineering Vol. 13, No. 4 ( 2022-12-30), p. 67-84
    Details
    In: Problems of Mechatronics Armament Aviation Safety Engineering, Index Copernicus, Vol. 13, No. 4 ( 2022-12-30), p. 67-84
    Abstract: This article provides a simulation and laboratory study of a control system for a two-wheeled differential-drive mobile robot with ROS system. The authors propose an approach to designing a control system based on a parametric model of the robot’s dynamics. The values of unknown parameters of the dynamic model have been determined by means of a Levenberg-Marguardt identification method. By comparing the desired trajectories with those obtained from simulation and laboratory tests, and based on errors analysis, the correctness of the model parameter identification process and the control system operation was then determined.
    Type of Medium: Online Resource
    ISSN: 2081-5891 , 2720-5266
    URL: Journal
    URL: Article
    DOI: 10.5604/20815891
    DOI: 10.5604/01.3001.0016.1458
    Language: English
    Publisher: Index Copernicus
    Publication Date: 2022
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  • 10
    Online Resource
    Online Resource
    Vehicle Navigation Systems Involving Inertial Sensors and Odometry Data from On-Board Diagnostics in Non-Gps Applications
    Uniwersytet Warminsko-Mazurski ; 2020
    In:  Technical Sciences Vol. 3, No. 22 ( 2020-03-23), p. 259-266
    Details
    In: Technical Sciences, Uniwersytet Warminsko-Mazurski, Vol. 3, No. 22 ( 2020-03-23), p. 259-266
    Abstract: This paper explores the applicability of on-board diagnostics data for minimizing inertial navigation errors in vehicles. The results of driving tests were presented and discussed. Knowledge  of a vehicle’s exact initial position and orientation was crucial in the navigation process. Orientation errors at the beginning of navigation contributed to positioning errors. GPS data were not processed by the algorithm during navigation.
    Type of Medium: Online Resource
    ISSN: 2083-4527 , 1505-4675
    URL: Article
    DOI: 10.31648/ts.4380
    Language: Unknown
    Publisher: Uniwersytet Warminsko-Mazurski
    Publication Date: 2020
    detail.hit.zdb_id: 2406481-6
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