Search results for "Contributio"
showing 10 items of 130 documents
Arm swing during skating at different skiing speeds affects skiing mechanics and performance
2018
Arm swing has been shown to lead to greater maximal speed and movement economy in cross -country skiing. The current study aimed to investigate how arm swing alters skiing mechanics and contributes to performance and acceleration of the athlete’s centre of mass (COM). While skiing on snow seven highly skilled cross -country skiers simulated V2 -alternate skating without using ski poles and with double or single arm swing and without arm swing . During leg push -off the linear momentum of the body increased due to arm swing. Simultaneously, linear momentum of the arm(s) decreased in arm swing trials, indicating a transfer of momentum from arms to the rest of the body and being more prevalent…
On the calculation of free energy of mixing for aqueous polymer solutions with group-contribution models
2010
Abstract Liquid–liquid phase separation processes are currently used as a route to prepare polymeric porous structures for various applications (membranes and scaffolds for tissue engineering). In membrane and foam fabrication technologies, binary and mainly ternary polymer solutions are used. Membrane morphology is strongly affected by phase equilibria of processing solution. In order to achieve a better control of membrane morphology and to explore a wide quantity of solvents, a predictive tool addressing experimentals would be strongly advisable. In this paper, group contribution models were chosen to test the applicability on a PLLA–dioxane–water ternary polymer solution, whose experime…
Vapor–liquid equilibria in dendrimer and hyperbranched polymer solutions: experimental data and modeling using UNIFAC-FV
2004
Abstract This work evaluates the potential of the group contribution method universal functional activity coefficients-free-volume (UNIFAC-FV) to predict vapor–liquid equilibria (VLE) in dendrimer-solvent and hyperbranched polymer-solvent systems. The VLE of hydroxyl-functional dendritic polymers (polyethers, polyesters, polyamidoamine), dissolved in polar solvents (ethanol and/or water) are studied both experimentally and theoretically. A new approach is suggested to account for the contribution of selected types of polymer structural units (i.e. linear, dendritic and terminal units) to the solvent residual activity. The results of calculations are in a good agreement with experiment. Furt…
Umorzenie należności z tytułu składek na ubezpieczenia społeczne przy braku całkowitej nieściągalności – wybrane problemy
2021
Jednym z obowiązków w prawie ubezpieczeń społecznych jest opłacanie składek na ubezpieczenia społeczne. Ustawodawca przewidział, że w praktyce może się zdarzyć, że płatnik z różnych powodów nie będzie mógł uiścić należności składkowych. Wobec tego wprowadził określone mechanizmy, które mają ułatwić realizację tego obowiązku. Najdalej idącym z nich jest umorzenie należności z tytułu składek, które ma szczególny charakter w sytuacji, gdy nie istnieje stan ich całkowitej nieściągalności. To rozwiązanie ma charakter pomocowy, który może byćktóry może być istotny z uwagi na skutki pandemii COVID-19 dla przedsiębiorców. Celem artykułu jest przedstawienie wybranych problemów interpretacyjnych z za…
Asiakas palvelun asiantuntijana – Ajankohtaisia tutkimuksia asiakkaan roolista palveluiden tuotannossa (Dunkel, W. & Kleemann, F. (2013) Customers at…
2014
Kirja-arvostelu: Dunkel, W. & Kleemann, F. (2013) Customers at Work. New Perspectives on Interactive Service Work. Basingstoke/New York: Palgrave Macmillan. 257s. nonPeerReviewed
Obliczanie wysokości emerytury na podstawie art. 26 ustawy o emeryturach i rentach z Funduszu Ubezpieczeń Społecznych w stosunku do ubezpieczonego, k…
2019
Proposed Polish Advertisement Levies – An Efficient Source of Public Income or Instruments of the Political Battle?
2022
This article analyses the bill of 2nd February 2021 on additional revenues of the National Health Fund, the National Fund for the Protection of Historical Monuments and the establishment of a Fund for the Support of Culture and National Heritage in the Media Area. The draft legislation, the announcement of which has triggered an unprecedented blackout protest in private media as well as a mass anti-government protest on the Internet, provides for the introduction of new public levies called advertisement contributions and the establishment of a new state special-purpose fund – the Fund for the Support of Culture and National Heritage in the Media Area. The aim of the article is to identify …
Préface Special Issue 'The Future of Agricultural Landscapes' part 1
2020
Préface de Advances in Ecological Research, Volume 63, the latest release in this ongoing series includes specific chapters on Tropical Ecosystems in the 21st Century. Chapters in this volume cover topics such as Landscape-scale expansion of agroecology to enhance natural pest control: a systematic review and Ecosystem services and the resilience of agricultural landscapes
Study of liquid–liquid equilibrium of the systems isobutyl acetate+acetic acid+water and isobutyl alcohol+acetic acid+water at different temperatures
2008
Abstract In this work, experimental liquid–liquid equilibria (LLE) data of the systems isobutyl acetate + acetic acid + water and isobutyl alcohol + acetic acid + water are presented. The liquid–liquid equilibria of both systems have been measured at 283.15 and 323.15 K. The NRTL and UNIQUAC models were applied to fit the data for both ternary systems. The interaction parameters obtained from both models successfully correlated the equilibrium compositions. The experimental tie lines were compared to the values predicted by the UNIFAC method. Moreover, the solvent capabilities of isobutyl acetate and isobutyl alcohol were compared.
The Large Hadron–Electron Collider at the HL-LHC
2021
The Large Hadron-Electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) to the energy and intensity frontier of particle physics. Exploiting energy-recovery technology, it collides a novel, intense electron beam with a proton or ion beam from the High-Luminosity Large Hadron Collider (HL-LHC). The accelerator and interaction region are designed for concurrent electron-proton and proton-proton operations. This report represents an update to the LHeC's conceptual design report (CDR), published in 2012. It comprises new results on the parton structure of the proton and heavier nuclei, QCD dynamics, and electroweak and top-quark physics. It is shown how the LH…