Various Proposed Interpretational Models
Its Evolution and a Detailed Assessment
Regarding Its Interpretational Possibilities
for the Polymer Nanocomposites
Three NanoVNAs, Two H4 NanoVNAs, and
One HP 8505A VNA
| JOURNAL / ISSUES ISSN 2310-6697 / ISSN-L 2310-6697 |
| open transactions on independent scientific-engineering research |
| FUNKTECHNIKPLUS # JOURNAL |
| Théorie-Expérimentation-Métrologie-Logiciel-Applications |
| ISSUE 36 - FRIDAY 31 JANUARY 2025 - YEAR 12 - PERIOD B' |
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| PORTRAIT PDF / LANDSCAPE PDF |
| PAPERS |
| Attribution 4.0 International License CC BY 4.0 |
| 36-1 |
| # Electrical Engineering - Théorie |
| Polymer Nanocomposites: A Short Review of Various Proposed Interpretational Models |
| M. Papadakis, M. G. Danikas, R. Sarathi, I. Palaiologou |
| ABSTRACT |
| This is a brief review of the various proposed models for polymer nanocomposites. Polymer nanocomposites are a promising possibility for insulating materials, especially nowadays with the increasing demands in electrical energy throughout the world. Until now there is a wealth of experimental data and also some concrete proposals in order to explain the behavior of these insulating materials. The present paper approaches the various models and their interpretational possibilities. It seems - despite the different approaches by a variety of authors - that the models do not present any obvious contradictions between them but they are rather complementary. |
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| 36-2 |
| # Electrical Engineering - Théorie |
| T. Tanaka’s Quantum Dot Model: Its Evolution and a Detailed Assessment Regarding Its Interpretational Possibilities for the Polymer Nanocomposites |
| I. Palaiologou, M. G. Danikas, R. Sarathi |
| ABSTRACT |
| Quantum dots, known for their quantum confinement effects and the unique qualities they provide, have emerged as key elements in material science, engineering and healthcare. This paper traces the contribution of Tanaka and his innovative application of quantum dot models focusing on the field of polymer nanocomposites. Over three decades, Tanaka moved beyond conventional perspectives by investigating nanoparticles as more than simple charge carriers, emphasizing their interactions with excitons and their effects on material aging and stability. By synthesizing these contributions, from his initial conceptual work to later refinements, this paper emphasizes the theoretical and practical significance of Tanaka’s research. His findings have not only enriched the fundamental understanding of polymer nanocomposites but have also broadened the scope of research in nanotechnology and polymer science, reflecting his significant impact on these fields. |
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| 36-3 |
| # Telecommunications Engineering - Métrologie |
| Comparing a NanoVNA with a LabVNA Part 2: Three NanoVNAs, Two H4 NanoVNAs, and One HP 8505A VNA |
| N. I. Yannopoulou, P. E. Zimourtopoulos |
| ABSTRACT |
| The "Handheld Vector Network Analyzer" H4 NanoVNA, has a top working frequency of 1500 MHz - well above the 900 MHz of NanoVNA. This fact motivated us to carry out a comparison not only between these two ToyVNA models, but also a comparison with our LabVNA. This paper presents our comparison results regarding six different VNAs, three NanoVNAs, two H4 NanoVNAs, and one HP 8505A VNA, using the measurements of the DUT Device Under Test we use as "standard 50-Ohm box DUT" we mentioned in Part 1. Interestingly enough, these comparisons reveal various jump-discontinuities in the frequency response of all five NanoVNAs, which were unnoticed until now, because NanoVNA measurements limited to 900 MHz. In order to somehow remedy this unpleasant situation, we suggest the use of our simple solution that we already successfully applied. |
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