Gregory Kozlowski

Wright State University

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Co-Authors

I. Maartense

University of Dayton

C. E. Oberly

UES (United States)

Richard Kleismit

University of Cincinnati

Rand R. Biggers

United States Air Force Research Laboratory

Krzysztof Kozioł

Cranfield University

P. Tekiel

Polish Academy of Sciences

T. L. Peterson

Helen DeVos Children's Hospital

Simon C. Hopkins

European Organization for Nuclear Research

D. Dempsey

University of Alabama at Birmingham

J. Kasperczyk

Jan Długosz University

Cooperative Institutions

United States Air Force Research Laboratory

Wright-Patterson Air Force Base

Wright State University

University of Michigan–Ann Arbor

University of California, Berkeley

University of Dayton

University of Cambridge

Universiti Teknologi Petronas

Polish Academy of Sciences

U.S. Air Force Research Laboratory Materials and Manufacturing Directorate

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Carbon Nanotubes Roles in Enhancing the Catalytic ehavior of α-Fe2O3 Nanowires for Green Ammonia Production Using the Magnetic Induction Method (MIM)

Journal of Surfaces and Interfaces of Materials (2014)

Noorhana Yahya Krzysztof Kozioł Gregory Kozlowski Jeefferie Abd Razak Poppy Puspitasari

10.1166/jsim.2014.1046

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Citations (4)

Magnetic measurements of percolation in coated conductors as an analogue of deteriorating living neural networks

PRZEGLĄD ELEKTROTECHNICZNY (2009)

A. Łękawa B.A. Głowacki Mariusz Woźniak Simon C. Hopkins Gregory Kozlowski

The possible analogy between the concept of the giant component that occurs in 2D living neural networks, and induced superconducting currents in granular coated conductors, was investigated. Studies of YBCO coated conductors were conducted using transport and Hall probe magnetometry. Encouraging results suggest that the design of superconducting polycrystalline coatings can benefit from knowledge of degrading neural networks. Streszczenie. Badano mozliwośc istnienia analogii pomiedzy pojeciem gigantycznego komponentu pojawiającego sie w dwuwymiarowych zywych sieciach neuronowych oraz indukowanych prądach nadprzewodnikowych w ziarnistych cienkowarstwowych taśmach nadprzewodnikowych. Badania przewodow YBCO byly prowadzone za pomocą czujnikow Halla. Wyniki przeprowadzonych eksperymentow dowodzą, ze wiedza na temat rozpadających sie sieci neuronowych moze byc korzystna dla projektowania polikrystalicznych powlok. (Pomiary magnetyczne perkolacji w cienkowarstwowych taśmach nadprzewodnikowych jako zjawiska analogicznego do degradacji zywych sieci neuronowych).

Percolation (cognitive psychology)

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Citations (2)

Grain growth enhancement in silver-doped YBa2Cu3O7−x superconductor

Journal of Materials Science (1991)

Gregory Kozlowski S. V. Rele D. F. Lee K. Saláma

Electroceramics

Transition temperature

10.1007/bf00576786

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Citations (27)

In-situ preparation of CoFe2O4 nanoparticles on eggshell membrane-activated carbon for microwave absorption

Heliyon (2023)

Hassan Soleimani Jemilat Yetunde Yusuf Lee Kean Chuan Hojjatollah Soleimani Mustapha Lutfi bin Sabar

This study explores the potential of using cobalt ferrite (CF) nanoparticles grown in situ on eggshell membranes (ESM) to mitigate the increasing problem of electromagnetic interference (EMI). A simple carbonization process was adopted to synthesize CF nanoparticles on ESM. The study further examines the composites' surface morphology and chemical composition and evaluates their microwave absorption performance (MAP) at X-band frequency. Results showed that the composite of CF and ESM - CESM@CF, exhibited a strong RL peak value of -39.03 mm with an optimal thickness of 1.5 mm. The combination of CF and ESM demonstrates excellent impedance matching and EM wave attenuation. The presence of numerous interfaces, conduction loss from the morphology, interfacial polarisation, and dual influence from both CF and ESM contribute to the high MAP of the composite. CESM@CF composite is projected as an excellent biomass-based nano-composite for EM wave absorption applications.

Reflection loss

Eggshell membrane

10.1016/j.heliyon.2023.e13256

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Citations (7)

Nur Jahan: Empress of Mughal India

Journal of the American Oriental Society (1994)

Gregory Kozlowski Ellison Banks Findly

10.2307/606205

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Citations (0)

Hysteretic ac losses in high-temperature superconductors

Applied Physics Letters (1989)

Gregory Kozlowski X. Y. Chen

Theory of ac losses in the type II superconductors in the frame of the critical state model [J. Thompson, M. Maley, and J. R. Clem, J. Appl. Phys. 50, 3531, 3518 (1979)] is applied to high Tc materials (Y-Ba-Cu-O) assuming an exponential drop of the critical current density Jc with both magnetic field and temperature. The dependence of dc magnetic field (H1) at which ac loss minimum occurs on an amplitude of ac magnetic field (h0) and on temperature Tc is calculated numerically. The two maxima of the total ac losses are found: one of them is very close to Tc and second maximum below Tc shifts to lower temperatures with increasing ac or dc magnetic field.

Maxima

10.1063/1.101454

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Citations (6)

Acoustic microscopy at 15.3 GHz in pressurized superfluid helium

Applied Physics Letters (1990)

M.S. Muha A.A. Moulthrop Gregory Kozlowski B. Hadimioglu

An acoustic microscope operating at 15.3 GHz and using superfluid 4He as the coupling medium has been developed. The helium is colder than 0.9 K to achieve low acoustic attenuation, and is pressurized to greater than 20 bar to eliminate three-phonon processes which saturate the received signal as the input power is increased. A resolution of 150 Å has been achieved.

Acoustic attenuation

10.1063/1.102603

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Citations (23)

Resistivity and magnetoresistance of superconducting YbRh_1.4Sn_4.6

Journal of Physics F Metal Physics (1985)

Naushad Ali S. B. Woods Gregory Kozlowski A. Rojek

The electrical resistivity, magnetoresistance (MR) and upper critical field (Hc2) of single-crystal superconducting YbRh1.4Sn4.6 have been studied. The high-temperature resistivity shows a saturation effect while an anomalous T2 dependence is observed at low temperatures. The high-temperature resistivity is interpreted in terms of a parallel-resistor model in which high-temperature saturation occurs where the electron mean free path reaches a lower limit approximately equal to the interatomic spacing. It is concluded that the T2 dependence is not due to electron-electron scattering and a theoretical understanding still remains unresolved. From the critical field study the authors have estimated the normal specific heat coefficient to be gamma =11.7 mJ mol-1K-2. It is also concluded that the Yb ion is in the divalent state in YbRh1.4Sn4.6.

Saturation (graph theory)

Critical field

Temperature coefficient

Electron scattering

10.1088/0305-4608/15/7/013

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Citations (11)

FIELD EVAPORATION OF n-Ge (111) IN HYDROGEN AND DECOMPOSITION OF GeH₄ IN HIGH ELECTROSTATIC FIELDS

Le Journal de Physique Colloques (1989)

C. Mainka W. Drachsel J.H. Block Gregory Kozlowski

10.1051/jphyscol:1989824

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