Search results for: T. Wójtowicz

Items from 1 to 20 out of 293 results

article

Analysis of morpho-anatomical stem properties determining its mechanical strength in selected rye cultivars

T. Wojtowicz, A. Grabowska-Joachimiak, A. Zielinski

International Agrophysics > 2020 > 34 > 1

article

Response of grass pea (Lathyrus sativus L.) photosynthetic apparatus to short-term intensive UV-A:red radiation

K. Tokarz, B. Piwowarczyk, A. Wysocka, T. Wojtowicz, more

Acta Physiologiae Plantarum > 2019 > 41 > 10

Plants growing under natural conditions are constantly exposed to ultraviolet (UV), primarily UV-A, radiation. Grass pea (Lathyrus sativus L.) is a legume species resistant to harsh growing conditions, such as drought, salinity or periodic flooding. Due to the advantageous composition of seeds, it is used for consumption in such regions as South Asia or East Africa where high intensity of UV radiation...

article

Multi-domain battle : new doctrine of the United States Armed Forces

T. Wójtowicz, D. Król

Zeszyty Naukowe Akademii Sztuki Wojennej > 2018 > nr 3(112) > 64--78

This article describes the newest doctrine of the U.S. Armed Forces, i.e. the Multi- Domain Battle (MDB) concept. It constitutes a description of several operational principles related to a potential conflict with the People’s Republic of China or the Russian Federation, such as the time and space for conducting military operations, the operating environment, the forces (base of operations), the target,...

article

Interfacial Ferromagnetism in a Co/CdTe Ferromagnet/Semiconductor Quantum Well Hybrid Structure

I. V. Kalitukha, M. Salewski, I. A. Akimov, V. L. Korenev, more

Physics of the Solid State > 2018 > 60 > 8 > 1578-1581

The magnetization properties of a ferromagnet-semiconductor Co/CdMgTe/CdTe quantum well hybrid structure are investigated by several techniques. Exploiting the proximity effect between acceptor bound holes and magnetic ions we detect the magnetization curves by measuring the circular polarization of photoluminescence in an out-of-plane magnetic field. We show that magnetization originates from interfacial...

article

Aging-associated changes in hippocampal glycogen metabolism. Evidence for and against astrocyte-neuron lactate shuttle

D. Drulls-Fajdasz, A. Gizak, T. Wojtowicz, J.R. Wisniewski, more

Acta Biochimica Polonica > 2018 > 65 > S2

article

The influence of Russian military involvement in the war in Syria

T. Wójtowicz, I. Barsznica, K. Drąg

Zeszyty Naukowe Akademii Sztuki Wojennej > 2018 > nr 2(111) > 85--99

The Russian military intervention in Syria, conducted between September 2015 and March 2016, was one of the crucial moments in the Middle East conflict which has evolved since 2011. It not only prevented the collapse of the regime of Bashar al-Assad but also enabled the initiative to be taken by the Syrian Arab Army. The simultaneous conducting of two military operations by the Russian army, i.e....

article

Zastosowanie nowoczesnych technologii w wierceniach obrotowych

R. Myćka, T. Wójtowicz

Bezpieczeństwo Pracy i Ochrona Środowiska w Górnictwie > 2018 > nr 10 > 3--12

W artykule przedstawiono rozwój technologii i narzędzi, jaki w ostatnich latach nastąpił w wierceniach kierunkowych. Opisano zalety i wady powszechnie stosowanych systemów RSS, ich wpływ na bezpieczeństwo prowadzonych robót, czas wiercenia otworów i co za tym idzie – zmniejszenie kosztów realizacji projektów.

article

LTE /LTE -A to TETRA selected features comparative assessment in the area of call prioritization, pre-emption and admission control for congested network scenarios

T. Wojtowicz

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne > 2018 > nr 10 > 856--863

Development can be observed in mission-critical public safety communication systems, where narrowband LMR (LandMobile Radio) technologies are getting augmented with broadband (LTE ) based solutions. There are at least several such projects around the world currently getting implemented, with many more expected to start in the next few years. With all the advanced features that broadband is enabling...

article

Influence of frequency and applied voltage on electrical characterization of p-ZnTe:N/CdTe:Mg/n-CdTe:I/GaAs grown by molecular beam epitaxy

A.A.M. Farag, I.S. Yahia, R. Jafer, Javed Iqbal, more

Materials Chemistry and Physics > 2017 > 201 > C > 354-361

A specialized heterojunction of p-ZnTe:N/CdTe:Mg/n-CdTe:I/GaAs for varicap and high response signal diode applications was epitaxially grown by using molecular beam epitaxy. Frequency dependence of the capacitance-voltage, conductance-voltage and series -resistance characteristics in the frequency spectrum from 10 kHz to 10 MHz at ambient temperature was investigated. An increase in the capacitance...

article

Electrical, photovoltaic and photosensitivity characteristics of p-ZnTe:N/CdTe:Mg/n-CdTe:I/GaAs for photodiode applications

I.S. Yahia, A.A.M. Farag, R. Jafer, Javed Iqbal, more

Materials Science in Semiconductor Processing > 2017 > 67 > C > 33-40

In this work, heterojunctions of p-ZnTe:N/CdTe:Mg/n-CdTe:I/GaAs for photovoltaic and photodiode application were grown epitaxially by using molecular beam system. Current-voltage profile of the heterojunction device was studied in dark and under various illumination intensities. The obtained photocurrent is found to depend on the light intensity. The main heterojunction parameters, such as shunt and...

chapter

Excitonic enhancement of the transverse magneto-optical Kerr effect in semiconductor nanostructures

O. Borovkova, F. Spitzer, I. Akimov, V. Belotelov, more

2017 11th International Congress on Engineered Materials Platforms for Novel Wave Phenomena (Metamaterials) > 37 - 39

2017 11th International Congress on Engineered Materials Platforms for Novel Wave Phenomena (Metamaterials)

It is demonstrated that the transverse magneto-optical Kerr effect experiences two-order enhancement in the spectral region of the excitonic resonance in the diluted magnetic semiconductor nanostructures. It is studied how the TMOKE depends on the incident angle and extenal magnetic field. The theoretical investigations are in a good agreement with experimental results.

article

Photoluminescence of CdTe/CdMgTe Double Quantum Wells with a Two-Dimensional Electron Gas

M. Deresz, M. Wiater, G. Karczewski, T. Wojtowicz, more

Acta Physica Polonica A > 2017 > 132 > 2 > 390-392

Magnetophotoluminescence measurements at liquid helium temperatures were carried out on asymmetric double quantum wells based on CdTe/CdMgTe heterostructures. Due to doping with shallow iodine donors, a two-dimensional electron gas was present in the quantum wells. The samples studied differed with the quantum well widths and doping level. We show a resemblance of the luminescence to results obtained...

article

Fabrication of CdMgTe/Cd(Mn)Te nanostructures with the application of high-resolution electron-beam lithography

E. Bobko, D. Płoch, M. Wiater, T. Wojtowicz, more

Opto-Electronics Review > 2017 > Vol. 25, No. 2 > 65--68

In this work we report on fabrication of quantum wires and quantum point contacts from the modulation doped CdMgTe/Cd(Mn)Te structures, with the application of a high-resolution electron-beam lithography. We emphasize on methods which were not yet utilized for these substrate materials. In particular, we describe the so-called shallow-etching approach, which allows for the fabrication of quantum constrictions...

article

Synaptic plasticity at basal and apical dendrites of hippocampal neurons engage unique intracellular cascades and matrix metalloproteases subtypes

T. Wojtowicz, P. Brzdak, O. Wojcicka, J.W. Mozrzymas

Acta Neurobiologiae Experimentalis > 2017 > 77 > Suppl.1

Cognitive processes such as learning and memory require functional modifications within neural circuits which involve reorganization of existing synaptic connections and modulation of its strength. In addition, neurons can significantly enhance information storage capacity by scaling dendritic and somatic excitability (e.g. EPSP-to-spike potentiation). Proteolysis of extracellular matrix constituents...

article

Role of dopamine D1\D5 receptors in modulating synaptic plasticity at basal and apical dendritic trees of pyramidal neurons in mouse hippocampus

O. Wojcicka, J.W. Mozrzymas, T. Wojtowicz

Acta Neurobiologiae Experimentalis > 2017 > 77 > Suppl.1

INTRODUCTION: Deciphering cellular mechanisms of neuronal circuits plasticity remains of key importance in understanding learning and memory. In the hippocampus, CA1 pyramidal neurons receive different amount of excitatory and modulatory dopaminergic inputs to basal and apical dendritic trees. This layer‑specific differential inputs may play a key role in encoding the respective memory traces. However...

article

Spatial contagion between stock markets in Central Europe

A. Czapkiewicz, T. Wójtowicz

Managerial Economics > 2017 > Vol. 18, no. 1 > 23--45

In this paper, we investigate contagion between three European stock markets: those in Frankfurt, Vienna, and Warsaw. Two of them are developed markets, while the last is an emerging market. Additionally, the stock exchanges in Vienna and Warsaw are competing markets in the CEE region. On the basis of daily and intraday returns, we analyze and compare the dependence between the major indices of these...

article

Deterioration of Mechanical Properties of MBE-Grown, Metastable Semiconductor Layer with Time: the Case of Zinc Blende MnTe

S. Adamiak, E. Dynowska, A. Dziedzic, K. Szmuc, more

Acta Physica Polonica A > 2016 > 130 > 5 > 1248-1250

Several few μm thick (001)-oriented, metastable MnTe layers with the zinc blende structure grown onto (001)GaAs substrate by MBE during different periods for the last twenty years were investigated by the scanning electron microscopy, atomic force microscopy, X-ray diffraction, and nanoindentation methods. A partial decomposition of the oldest investigated layers was demonstrated. An important decrease...

article

Technologia cienkich warstw tlenku cynku o kontrolowanych własnościach strukturalnych, transportowych i optycznych

M. A. Borysiewicz, E. Kamińska, T. Wojciechowski, K. Gołaszewska, more

Elektronika : konstrukcje, technologie, zastosowania > 2016 > Vol. 57, nr 8 > 75--80

W ramach artykułu zaprezentowaliśmy wyniki prac dotyczących kontroli struktury, morfologii, własności transportowych i optycznych cienkich warstw tlenku cynku (ZnO) wytwarzanych na drodze magnetronowego rozpylania katodowego. Wykorzystując zaawansowany reaktor rozpylania katodowego umożliwiający kontrolę parametrów procesu osadzania takich, jak temperatura podłoża, przepływ gazów, ciśnienie gazów,...

article

Spin–orbit stiffness of the spin‐polarized electron gas

F. Baboux, F. Perez, C. A. Ullrich, G. Karczewski, more

physica status solidi (RRL) – Rapid Research Letters > 10 > 4 > 315 - 319

In a spin‐polarized electron gas, Coulomb interaction couples the spin and motion degrees of freedom to build propagating spin waves. The spin wave stiffness S_sw quantifies the energy cost to trigger such excitation by perturbing the kinetic energy of the electron gas (i.e. putting it in motion). Here we introduce the concept of spin–orbit stiffness, S_so, as the energy necessary to excite a spin wave...

chapter

Magnetic Anisotropy in Ferromagnetic III-Mn-V Semiconductors: Issues and Observations

J. K. Furdyna, X. Liu, T. Wojtowicz, W. L. Lim, more

Advances in Solid State Physics > Advances in Solid State Physics > 515-532

Magnetic anisotropy (MA) in III-V-based ferromagnetic (FM) semiconductor alloys (e.g., Ga $$_{1 - x}$$ Mn $$_{x}$$ As) is of critical importance for the design and implementation of spin-dependent devices based on these materials. This property can be ‘‘engineered’’ and controlled either by imposing appropriate strain conditions on the FM film, or by choosing the hole concentration p. Here it...

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78.55.ET (21)
QUANTUM WELLS (16)
DILUTED MAGNETIC SEMICONDUCTORS (15)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 75.50.PP (14)
EXCITONS (13)
75.50.PP (12)
QUANTUM HALL EFFECT (11)
73.61.GA (10)
FERROMAGNETIC SEMICONDUCTORS (9)
73.20.DX (8)
78.47.+P (8)
DILUTED MAGNETIC SEMICONDUCTOR (8)
MOLECULAR BEAM EPITAXY (8)
78.67.DE (7)
PHOTOLUMINESCENCE (7)
GAMNAS (6)
LUMINESCENCE (6)
SEMICONDUCTORS (6)
78.66.HF (5)
CDTE (5)
CYCLOTRON RESONANCE (5)
MAGNETIC SEMICONDUCTORS (5)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 78.55.ET (5)
71.55.GS (4)
78.30.-J (4)
78.67.BF (4)
78.67.HC (4)
CDTE/CDMNTE (4)
DMS (4)
II–VI SEMICONDUCTORS (4)
RAMAN SCATTERING (4)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 78.66.HF (4)
2D ELECTRON GAS (3)
61.72.VV (3)
63.20.-E (3)
68.55.BD (3)
68.55.LN (3)
68.65.LA (3)
71.35.+Z (3)
71.35.JI (3)
72.15.RN (3)
73.20.FZ (3)
75.30.DS (3)
75.50.-Y (3)
75.50.RR (3)
76.70.HB (3)
78.20.LS (3)
78.30.FS (3)
81.05.DZ (3)
81.07.BC (3)
81.15.HI (3)
ANNEALING (3)
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[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 72.25.DC (3)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 73.61.EY (3)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 75.70.-I (3)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 78.20.LS (3)
60.00; 70.00; 80.00 (2)
61.14.HG (2)
6502 (2)
68.37.HK (2)
68.37.LP (2)
68.55.JK (2)
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Search results for: T. Wójtowicz

Analysis of morpho-anatomical stem properties determining its mechanical strength in selected rye cultivars

Response of grass pea (Lathyrus sativus L.) photosynthetic apparatus to short-term intensive UV-A:red radiation

Multi-domain battle : new doctrine of the United States Armed Forces

Interfacial Ferromagnetism in a Co/CdTe Ferromagnet/Semiconductor Quantum Well Hybrid Structure

Aging-associated changes in hippocampal glycogen metabolism. Evidence for and against astrocyte-neuron lactate shuttle

The influence of Russian military involvement in the war in Syria

Zastosowanie nowoczesnych technologii w wierceniach obrotowych

LTE /LTE -A to TETRA selected features comparative assessment in the area of call prioritization, pre-emption and admission control for congested network scenarios

Influence of frequency and applied voltage on electrical characterization of p-ZnTe:N/CdTe:Mg/n-CdTe:I/GaAs grown by molecular beam epitaxy

Electrical, photovoltaic and photosensitivity characteristics of p-ZnTe:N/CdTe:Mg/n-CdTe:I/GaAs for photodiode applications

Excitonic enhancement of the transverse magneto-optical Kerr effect in semiconductor nanostructures

Photoluminescence of CdTe/CdMgTe Double Quantum Wells with a Two-Dimensional Electron Gas

Fabrication of CdMgTe/Cd(Mn)Te nanostructures with the application of high-resolution electron-beam lithography

Synaptic plasticity at basal and apical dendrites of hippocampal neurons engage unique intracellular cascades and matrix metalloproteases subtypes

Role of dopamine D1\D5 receptors in modulating synaptic plasticity at basal and apical dendritic trees of pyramidal neurons in mouse hippocampus

Spatial contagion between stock markets in Central Europe

Deterioration of Mechanical Properties of MBE-Grown, Metastable Semiconductor Layer with Time: the Case of Zinc Blende MnTe

Technologia cienkich warstw tlenku cynku o kontrolowanych własnościach strukturalnych, transportowych i optycznych

Spin–orbit stiffness of the spin‐polarized electron gas

Magnetic Anisotropy in Ferromagnetic III-Mn-V Semiconductors: Issues and Observations

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