Wyniki wyszukiwania - Biblioteka Nauki

1

The development of the e-commerce market as a challenge for maritime transport and shipping

100%

Kazmierczak-Piwko L. , Zagajewski A. , Łagutko T. , Sikora M.

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2022

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tom z. 160

315--326

EN

Purpose: The article deals with the development of the e-commerce market as a challenge for international maritime transport and shipping. The aim of the study is to analyze the current, post-andemic factors in the development of the e-commerce market and its impact on the functioning of the maritime transport and shipping market, with an indication of the synthetic implications for changes that should be introduced to improve the functioning of maritime transport, goods responding to the demand expressed on the global e-commerce market. Design/methodology/approach: The article uses the method of analyzing the literature and the method of analyzing data from public statistics on the development and functioning of the e-commerce market as well as shipping and sea transport in 2012-2020. Findings: The main factors of development and problems resulting from the development of the e-commerce market before and after the Covid 19 pandemic were identified as challenges for the transport and shipping of goods by sea. Practical implications: Organization of the supply chain in the area of targeting the development of transport services and international freight forwarding based on maritime transport and shipping. Originality/value: The value and originality of the articles results from a thorough review of the current literature on the subject and statistical data on the functioning of enterprises from the e-commerce market as well as transport and sea freight. The recipients of the results of this work may be managers and persons shaping the rules of functioning on the maritime transport and shipping market.

2

The effect of the configuration of the dive’s towed equioment on the lifeguguard physiological overload

88%

Mikołajczyk R. , Sikora M. , Łakomy O. , Żebrowska A. , Siermontowski P.

Polish Hyperbaric Research

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2022

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tom nr 4(81)

113--122

EN

The aim of the study was to determine the effects of rescue swimming on lifeguard cardiorespiratory system assessed based on heart rate (HR), lung ventilation (V̇E), oxygen uptake (V̇O₂) and blood lactate concentration (LA). Furthermore, we also investigated the possible impact of the rescue equipment of the towed diver on the lifeguard physiological overload and towing speed. Exercise variables were measured in lifeguards aged 25.5 ± 6. years before and immediately after the swimming a distance of 50 m with a person in tow with or without diving equipment. There were no significant effect of different protocols of towing on V̇O₂. The type of towing protocols have a significant effect on HR, V̇E/V̇O₂ ratio, and blood LA levels. The towing time and the average towing speed during simulated rescue operation were significantly different depending on the type of the towing person’s equipment. Towing a diver wearing only a dry suit significantly reduces the towing time, increases towing speed and may be result in better exercise tolerance and less fatigue for rescuer compared to towing a diver in a full classic or wing diving set.

3

Rola infrastruktury społecznej w zrównoważonym rozwoju obszarów wiejskich

88%

Dąbrowski A. , Korn M. , Nowicka D. , Poźniak J. , Sikora M.

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tom Vol. 8, iss. 2

93--102

PL

Artykuł wskazuje rolę infrastruktury społecznej jako jeden z najważniejszych czynników w zrównoważonym rozwoju obszarów wiejskich. Pomiędzy infrastrukturą społeczną a zrównoważonym rozwojem, istnieje ścisły związek, ponieważ wyposażenie infrastrukturalne determinuje tempo rozwoju. W artykule przedstawiony został także temat pojęcia infrastruktury jak i zrównoważonego rozwoju.

EN

The article indicates the role of social infrastructure as one of the most important factors in the sustainable development of rural areas. There is a close relationship between the social infrastructure and sustainable development, because infrastructural equipment determines the pace of development. The article also presents the topic of the concept of infrastructure and sustainable development.

4

Evaluation of Physiological Stress Experienced by Divers Maintaining an Upright Position on the Water Surface Depending on the Buoyancy Control Device

88%

Żebrowska A. , Siermontowski P. , Mikołajczyk R. , Sikora M. , Łakomy O.

Polish Hyperbaric Research

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2021

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tom nr 3(76)

35--44

EN

The knowledge of physiological reactions enabling a diver increasing the functional reserve in a life-threatening situation is not yet complete. It is suggested that the ability to adapt to prolonged stress experienced by divers maintaining an upright position on the water surface is associated with the diver’s individual characteristics and the type of the buoyancy control device. The purpose of this study was to perform a preliminary evaluation of physiological variables in divers wearing two different types of buoyancy control device and floating upright at the surface to determine the level of safety offered by each of them. The physiological variables were measured while participants wearing a classical dive vest and a wing dive vest. The oxygen uptake and heart rate measured after 30 minutes of experiment were significantly greater in participants using wing dive vest than classical dive vest. The results confirm the possibility of using physiological indicators to compare the fatigue and rescue function in divers depending on the buoyancy control device type.

PL

Dotychczas nie w pełni poznane są reakcje fizjologiczne, które wpływają na zdolność utrzymania się w warunkach zanurzenia w wodzie nurków w sytuacji zagrożenia. Sugeruje się, że zdolności przystosowawcze do długotrwałego obciążenia organizmu podczas utrzymywania się w pozycji pionowej na powierzchni mogą wynikać z indywidualnych predyspozycji nurka i stosowanych urządzeń ratunkowo-wypornościowych. Celem badań była ocena obciążenia fizjologicznego nurka w sprzęcie lekkim podczas utrzymywania się w pozycji pionowej na powierzchni w zależności od wykorzystywanego urządzenia ratunkowo - wypornościowego. W badanej grupie nurków zmierzono wskaźniki fizjologiczne podczas zanurzenia w wodzie w pozycji pionowej z utrzymaniem twarzy na powierzchni w dwóch różnych kamizelkach ratunkowo - wypornościowych tj.: klasycznej i typu skrzydło. Większe zapotrzebowania na tlen, przyspieszenie rytmu pracy i większe ryzyko obniżenia dostępności tlenu po trzydziestu minutach utrzymywania się na powierzchni wody stwierdzono w kamizelce typu skrzydło w porównaniu do kamizelki klasycznej. Wyniki badań niniejszej pracy potwierdzają możliwość wykorzystania wskaźników fizjologicznych do oceny funkcji ratunkowej urządzeń wypornościowo-ratunkowych u nurków.

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Magnetostrictive Functional Materials of Tb0.27Dy0.73(Fe1-xAlx)2 Series as Prospective Constituents of Magnetoelectric Composites

75%

Winiarska B. , Guzdek P. , Kuciakowski J. , Tokarz W. , Sikora M. , Pszczoła J.

Archives of Metallurgy and Materials

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2023

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tom Vol. 68, iss. 1

215--222

EN

Structural, magnetic, and magnetostrictive properties of two-sublattice Tb0.27Dy0.73(Fe1-xAlx)2 polycrystalline intermetallic ferrimagnets (x = 0-0.2 and 1.0) were studied using X-ray powder diffraction, magnetometry, and strain gauge magnetostriction measurements. Temperature dependences of magnetization starting from 80 K were presented, and Curie temperatures were estimated. Coercive force, residual, and saturation magnetizations were determined from the magnetic hysteresis loops at room temperature. Longitudinal, transversal, form and volume magnetostrictions were investigated against the x parameter and the intensity of the magnetic field. The piezomagnetic coefficients were determined and the maximum value at the field below 1 kOe, even enhanced than that in Terfenol-D, was observed for the material TTb0.27Dy0.73(Fe0.9Al0.1)2. It means that this compound is promising for use in magnetoelectric composites.