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Slawomir Koziel
Polish Academy of Sciences
1,042Publications
44H-index
11kCitations
Publications 1042
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#1Natalia Nowak-Szczepanska (PAN: Polish Academy of Sciences)H-Index: 2
#2Aleksandra Gomula (PAN: Polish Academy of Sciences)H-Index: 3
Last.Slawomir Koziel (PAN: Polish Academy of Sciences)H-Index: 44
view all 3 authors...
Intergenerational changes in many biological traits are indicators of environmental conditions. One of such anthropometric measures is the mid-upper arm circumference (MUAC) which estimates nutritional status. Likewise, Body Mass Index (BMI) is widely used as an anthropometric indicator of relative weight. The aim of this study was to reveal secular trends in MUAC and BMI, as biological indicators of changing living conditions, between 1966 and 2012 among Polish children from different socioecon...
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#1Robert M. Malina (University of Texas at Austin)H-Index: 74
#2Sean P. Cumming (University of Bath)H-Index: 29
Last.Slawomir Koziel (PAN: Polish Academy of Sciences)H-Index: 44
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Inter-individual differences in size, maturity status, function, and behavior among youth of the same chronological age (CA) have long been a concern in grouping for sport. Bio-banding is a recent attempt to accommodate maturity-associated variation among youth in sport. The historical basis of the concept of maturity-matching and its relevance to youth sport, and bio-banding as currently applied are reviewed. Maturity matching in sport has often been noted but has not been systematically applie...
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#1Muhammad Aziz ul Haq (RU: Reykjavík University)H-Index: 3
#2Slawomir Koziel (RU: Reykjavík University)H-Index: 44
This letter presents a technique for size reduction of wideband multiple-input–multiple-output (MIMO) antennas. Our approach is a two-stage procedure. At the first stage, the antenna structure is modified to improve its impedance matching. This is achieved through incorporation of an n -section tapered feedline , followed by reoptimization of geometry parameters. Reducing the maximum in-band reflection well beyond the acceptance level of −10 dB creates room for size reduction, realized in the se...
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#1Anna Siniarska (Cardinal Stefan Wyszyński University in Warsaw)
#2Joanna Nieczuja-Dwojacka (Cardinal Stefan Wyszyński University in Warsaw)H-Index: 1
Last.Napoleon WolanskiH-Index: 7
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#1Anna Pietrenko-Dabrowska (GUT: Gdańsk University of Technology)H-Index: 2
#2Slawomir Koziel (RU: Reykjavík University)H-Index: 44
Design of modern antenna structures heavily exploits full-wave electromagnetic (EM) simulation tools. It is a practical necessity that results from unavailability or unreliability of other evaluation methods. EM-based adjustment of geometry parameter values aiming at improvement of electrical and field characteristics of the antenna at hand (also referred to as design closure) is of growing importance, especially in the case of topologically complex structures. When coupled with numerical optimi...
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#1A. Żak (GUT: Gdańsk University of Technology)H-Index: 17
#2Marek Krawczuk (GUT: Gdańsk University of Technology)H-Index: 29
Last.Slawomir Koziel (RU: Reykjavík University)H-Index: 44
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Abstract This paper presents results of investigations on a three-dimensional (3-D) isotropic periodic beam. The beam can represent a vibroacoustic isolator of optimised dynamic characteristics in the case of its longitudinal, flexural and torsional behaviour. The optimisation process concerned both the widths as well as the positions of particular frequency band gaps that are present in the frequency spectrum of the beam. Since the dynamic behaviour of the beam is directly related to its geomet...
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