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The paper presents a series of designed microstrip antennas with different gain and width radiation characteristics and intended for use in Wi-Fi systems. These antennas in a multilayer system were analyzed with the use of computer programs, and then the parameters and characteristics of these antennas were measured. At the same time, to check the correctness of work, additional measurements of the temperature of the radiators were used with a thermal imaging camera. The obtained results were compared with the results of calculations and measurements. They show high compliance with both calculations and measurements. At the same time, thermovision measurements show the weaknesses of the designed power lines.

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Bibliography

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Authors and Affiliations

Marian Wnuk

1

Military University of Technology, Poland

Assessment of the impact of individual therapy on upper limb function in patientsdiagnosed with painful shoulder syndrome

Agnieszka Wnuk Anna Świtoń Aleksiej Juszczak Ewa Mizia

Folia Medica Cracoviensia | 2017 | vol. 57 | No 1 | DOI: 10.24425/fmc.2017.115927

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Authors and Affiliations

Agnieszka Wnuk

Anna Świtoń

Aleksiej Juszczak

Ewa Mizia

Is there a relationship between functional flat foot and prevalence of non-insertional achilles tendinopathy in joggers? — a pilot study

Agnieszka Wnuk Ewa Mizia Bartosz Rutowicz Jerzy A. Walocha

Folia Medica Cracoviensia | 2017 | vol. 57 | No 3

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Authors and Affiliations

Agnieszka Wnuk

Ewa Mizia

Bartosz Rutowicz

Jerzy A. Walocha

The occurrence of thrips (Thripdae, Thysanoptera) on differentcul ci vars of pea (Pisurn sativurn L.)

Andrzej Wnuk Maria Pobożniak

Journal of Plant Protection Research | 2003 | vol. 43 | No 2 | 77-85

Keywords Pisum sativum L. pea cultivars thrips

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Abstract

In 1999-2001 the occurrence of thrips was analysed on seven cultivars of pea. The samples of leaves, then leaves and flower buds and the flowers were collected from plots. The analyses were initiated when the earliest cultivar (Sześciotygodniowy) began flowering and were repeated every 4-7 days, until the end of flowering. The following species of th rips were found: Franklinie/la intonsa Trybom, Thrips major Uzel, Thrips fuscipennis Hal., Thrips tabaci Lind. and Kakothrips robustus Uzel. The clear differences between the number of thrips on the particular cul tivars of pea were noticed. The most attractive were late cultivars Nike and Telefon as well as middle late Delisa II. It seems that the most important factor effecting on the number of thrips on particular cultivars was rather the start and the end of flowering than the length of the flowering period. The greatest number of thrips was noticed on flowers, from 50% to 77%. The thrips initially were found on leaves and then, as the pea was growing, on the flower buds and flowers. After the emergence of thrips, the analyses should be first initiated on leaves.

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Authors and Affiliations

Andrzej Wnuk

Maria Pobożniak

Occurrence of black bean aphid (A phis fabae Scop) and coccinellid beetles (Coccinellidae) on red beet in relation to coverage of crop by weeds

Maria Pobożniak Andrzej Wnuk

Journal of Plant Protection Research | 2003 | vol. 43 | No 4 | 335-343

Keywords red beet weeds black bean aphid coccinellid beetles

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Abstract

The experiments were carried out on red beet (cv. Czerwona Kula) from 1997 to 2000. Four combinations differing in ground coverage by weeds were analyzed. During the whole observation period, the greatest numbers of aphids were noticed on the plots kept weed free, while the lowest numbers of aphids were found on the plots where the weeds were not removed and exceptionally, in 1997, on the plots weeded twice. Over the years of observations, the greatest numbers of larvae and adult of Coccinellidae were found on the plots kept weed free, where the bean aphids were the most numerous. Among the four species of adult coccinellid beetles found in the colonies of black bean aphids, the most dominant was Coccinella septempunctata L.

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Authors and Affiliations

Maria Pobożniak

Andrzej Wnuk

Coefficient of Friction of a Brake Disc-Brake Pad Friction Couple

M. Mróz A.W. Orłowicz G. Wnuk O. Markowska W. Homik B. Kolbusz

Archives of Foundry Engineering | 2016 | No 4 | DOI: 10.1515/afe-2016-0109

Keywords Flake graphite cast iron Brake discs Abrasive wear resistance Coefficient of friction

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Abstract

The paper concerns evaluation of the coefficient of friction characterising a friction couple comprising a commercial brake disc cast of

flake graphite grey iron and a typical brake pad for passenger motor car. For the applied interaction conditions, the brake pressure of

0.53 MPa and the linear velocity measured on the pad-disc trace axis equalling 15 km/h, evolution of the friction coefficient μ values were

observed. It turned out that after a period of 50 minutes, temperature reached the value 270°C and got stabilised. After this time interval,

the friction coefficient value also got stabilised on the level of μ = 0.38. In case of a block in its original state, stabilisation of the friction

coefficient value occurred after a stage in the course of which a continuous growth of its value was observed up to the level μ = 0.41 and

then a decrease to the value μ = 0.38. It can be assumed that occurrence of this stage was an effect of an initial running-in of the friction

couple. In consecutive abrasion tests on the same friction couple, the friction coefficient value stabilisation occurred after the stage of

a steady increase of its value. It can be stated that the stage corresponded to a secondary running-in of the friction couple. The observed

stages lasted for similar periods of time and ended with reaching the stabile level of temperature of the disc-pad contact surface.

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Authors and Affiliations

M. Mróz

A.W. Orłowicz

G. Wnuk

O. Markowska

W. Homik

B. Kolbusz

Code of Ethics

Małgorzata Gmurczyk-Wrońska Marek Kornat Mariusz Mazur Andrzej Nowak Henryk Rutkowski Rafał Stobiecki Dariusz Stola Rafał Wnuk Krzysztof Zamorski

Historyka Studia Metodologiczne | 2021 | tom 51 | 305-312

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Abstract

W dniu 12 marca 2019 roku Zarząd Główny PTH podjął uchwałę o powołaniu komisji ds. opracowania kodeksu etyki. W składzie podanym niżej komisja naj-pierw opracowała projekt, który po wielu dyskusjach, naradach i konsultacjach przyjęła ostatecznie w dniu 30 czerwca 2020 roku. Oprócz projektu kodeksu, komisja przygotowała również drogę jego przyjęcia przy akceptacji możliwie dużego gremium członków PTH. W dniu 22 września 2020 roku projekt kodeksu etyki został zatwierdzony przez prezydium Zarządu Głównego. W tym kształcie trafił do wszystkich oddziałów oraz został przedstawiony na stronie PTH. Poda-no przy tej okazji sposoby przesyłania uwag na ręce komisji. W dniu 31 grudnia 2020 roku zakończył się okres konsultacji i komisja przystąpiła do opracowania go w kształcie możliwie szeroko uwzględniającym przedstawione uwagi. Na posiedzeniu w dniu 26 marca 2021 roku Zarząd Główny PTH podjął uchwałę o przyjęciu „Kodeksu etyki PTH”. Kodeks ten będzie przedstawiony do zatwier-dzenia na najbliższym Walnym Zgromadzeniu Delegatów PTH.

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Authors and Affiliations

Małgorzata Gmurczyk-Wrońska

Marek Kornat

Mariusz Mazur

Andrzej Nowak

Henryk Rutkowski

Rafał Stobiecki

e-mail:

ORCID:

Dariusz Stola

Rafał Wnuk

Krzysztof Zamorski

“In-vitro” Tests on New Biodegradable Metallic Material Based on ZnMgY

C. Panaghie N. Cimpoesu M. Benchea A.-M. Roman V. Manole A. Alexandru R. Cimpoesu M.M. Cazacu I. Wnuk G. Zegan

Archives of Metallurgy and Materials | 2022 | vol. 67 | No 2 | 587-594 | DOI: 10.24425/amm.2022.137794

Keywords Biodegradable Tafel Potentiostat Micro-hardness 10xDPBS

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Abstract

Biodegradable materials represent a new class of biocompatible materials with applications in many medical cases where the support must be provided only for a certain period. In this article obtaining of ZnMgY alloy is presented along with some basic characteristic investigations like chemical composition (energy dispersive spectroscopy – EDS), microstructure (optical microscopy – OM and scanning and electron microscopy – SEM), immersion behavior in 10xDPBS (Dulbecco Phosphate Buffer Saline) solution (mass loss and surface degradation), electro-corrosion behavior (potentiostat with a three electrodes cell) and micro-hardness of the experimental alloy compared to cast Zn and ZnMg materials. The results present an improvement of micro-hardness of Zn by alloying with Mg and Y and a modification of corrosion resistance.

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Authors and Affiliations

C. Panaghie

1

e-mail:

ORCID:

N. Cimpoesu

1

e-mail:

ORCID:

M. Benchea

2

e-mail:

ORCID:

A.-M. Roman

1

e-mail:

ORCID:

V. Manole

1

e-mail:

ORCID:

A. Alexandru

1

e-mail:

ORCID:

R. Cimpoesu

1

e-mail:

ORCID:

M.M. Cazacu

3

e-mail:

ORCID:

I. Wnuk

4

e-mail:

ORCID:

G. Zegan

5

e-mail:

ORCID:

Gheorghe Asachi University of Iasi, Faculty of Materials Science Engineering, Prof.dr.doc. D. Mangeron Str., no. 41, Iași 700050, Romania
Gheorghe Asachi University of Iasi, Faculty of Mechanical Engineering, Prof.dr.doc. D. Mangeron Str., No. 61-63, Iași 700050, Romania
Gheorghe Asachi University of Iasi, Department of Physics, Prof.dr.doc. D. Mangeron Str., No. 59A, Iași 700050, Romania
Częstochowa University of Technology, Department of Physics, 19 Armii Krajowej Av., 42-200 Częstochowa, Poland
Grigore T. Popa University of Medicine and Pharmacy, Faculty of Dental Medicine, University Str., No. 16, Iași 700115, Romania

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Experimental Study on Thermodynamics of the Cu-Ni-Sn-Bi Liquid Alloys

Authors and Affiliations

Optimization of activated sludge storage before RNA isolation

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The Occurrence of Syrphidae in Aphis Fabae Scop. (Hemiptera) Colonies on Broad Bean Intercropped with Phacelia (Part II)

Authors and Affiliations

Two methods to analyze microstrip antennas for Wi-Fi bandwidth

Abstract

Bibliography

Authors and Affiliations

Assessment of the impact of individual therapy on upper limb function in patientsdiagnosed with painful shoulder syndrome

Authors and Affiliations

Is there a relationship between functional flat foot and prevalence of non-insertional achilles tendinopathy in joggers? — a pilot study

Authors and Affiliations

The occurrence of thrips (Thripdae, Thysanoptera) on differentcul ci vars of pea (Pisurn sativurn L.)

Abstract

Authors and Affiliations

Occurrence of black bean aphid (A phis fabae Scop) and coccinellid beetles (Coccinellidae) on red beet in relation to coverage of crop by weeds

Abstract

Authors and Affiliations

Coefficient of Friction of a Brake Disc-Brake Pad Friction Couple

Abstract

Authors and Affiliations

Code of Ethics

Abstract

Authors and Affiliations

“In-vitro” Tests on New Biodegradable Metallic Material Based on ZnMgY

Abstract

Authors and Affiliations