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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

Two methods to analyze microstrip antennas for Wi-Fi bandwidth

Marian Wnuk
Archives of Electrical Engineering | 2021 | vol. 70 | No 3 | 705-718 | DOI: 10.24425/aee.2021.137583
Keywords antenna gain microstrip antenna thermovision measurements
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Abstract

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
  1. Military University of Technology, Poland

Jakość badań jakościowych podczas pandemii COVID-19 – doświadczenia badaczy i badaczek społeczno-humanistycznych

Sylwia Męcfal Beata Bielska Katarzyna Kalinowska Adrianna Surmiak
Studia Socjologiczne | 2023 | No 3 | 9-36 | DOI: 10.24425/sts.2023.147159
Keywords pandemia COVID-19 jakość badań jakościowych kryteria jakości badań proces badawczy badania społeczne w czasie kryzysu społecznego
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Abstract

W artykule opisujemy zmiany w zakresie jakości badań jakościowych wynikające z dostosowywania praktyk badawczych do warunków pandemicznych na kolejnych etapach procesu badawczego. Analiza powstała na podstawie 32 wywiadów pogłębionych z badaczami i badaczkami społeczno-humanistycznymi. Omawiamy „drogi do jakości” i „drogi do niejakości” w badaniach jakościowych w czasie kryzysu pandemicznego. Osoby prowadzące badania cechowała ambiwalencja w ocenie wpływu warunków pandemicznych na jakość ich badań. Analiza skupień pokazała z kolei, że strategie zapewniania jakości badań jakościowych w pandemii różniły się ze względu na uważność na zmiany jakości w różnych fazach procesu badawczego. Wyróżniono strategie polegające na dążeniu do osiągania jakości głównie na etapie realizacji badań oraz strategie holistyczne, skupione na zapewnianiu jakości we wszystkich fazach badania. Uzyskane wyniki zostały zinterpretowane w odniesieniu do czterech podejść do jakości badań jakościowych wyróżnionych na podstawie analizy literatury przedmiotu.
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Authors and Affiliations

Sylwia Męcfal
1
ORCID: ORCID
Beata Bielska
2
ORCID: ORCID
Katarzyna Kalinowska
3
ORCID: ORCID
Adrianna Surmiak
4
ORCID: ORCID
  1. Instytut Socjologii, Uniwersytet Łódzki
  2. Instytut Socjologii, Uniwersytet Mikołaja Kopernika w Toruniu
  3. Instytut Socjologii im. E. Wnuk-Lipińskiego Collegium Civitas
  4. Instytut Stosowanych Nauk Społecznych, Uniwersytet Warszawski

“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
ORCID: ORCID
N. Cimpoesu
1
ORCID: ORCID
M. Benchea
2
ORCID: ORCID
A.-M. Roman
1
ORCID: ORCID
V. Manole
1
ORCID: ORCID
A. Alexandru
1
ORCID: ORCID
R. Cimpoesu
1
ORCID: ORCID
M.M. Cazacu
3
ORCID: ORCID
I. Wnuk
4
ORCID: ORCID
G. Zegan
5
ORCID: ORCID
  1. Gheorghe Asachi University of Iasi, Faculty of Materials Science Engineering, Prof.dr.doc. D. Mangeron Str., no. 41, Iași 700050, Romania
  2. Gheorghe Asachi University of Iasi, Faculty of Mechanical Engineering, Prof.dr.doc. D. Mangeron Str., No. 61-63, Iași 700050, Romania
  3. Gheorghe Asachi University of Iasi, Department of Physics, Prof.dr.doc. D. Mangeron Str., No. 59A, Iași 700050, Romania
  4. Częstochowa University of Technology, Department of Physics, 19 Armii Krajowej Av., 42-200 Częstochowa, Poland
  5. Grigore T. Popa University of Medicine and Pharmacy, Faculty of Dental Medicine, University Str., No. 16, Iași 700115, Romania

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