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  1. Article

    Open Access

    Characterization of induced quasi-two-dimensional transport in n-type InxGa1−xAs1 − yBiy bulk layer

    The temperature-dependent transport properties of n-type InGaAsBi epitaxial alloys with various do** densities are investigated by conducting magnetoresistance (MR) and Hall Effect (HE) measurements. The ele...

    Mustafa Aydin, Selen Nur Yilmaz, James Bork, Joshua Zide, Ayse Erol in Applied Physics A (2024)

  2. Article

    Open Access

    A Cost Effective Solution to an Automated Valet Parking System

    Automated Valet Parking Systems (AVPS) relieve the driver of the entire parking process. Many of the systems known today rely on a combination of automotive sensors with sensors of the infrastructure. For this...

    Ömer Dönmez, Ondřej Vaculín, Thiago de Borba in International Journal of Automotive Techno… (2024)

  3. No Access

    Chapter

    Zusammenfassung und Ausblick

    Im Rahmen dieser Masterarbeit wurde ein funktionierendes AVP System erarbeitet und entwickelt. In diesem Zusammenhang wurden Anforderungen an das System ermittelt und das System funktional sowie technisch entw...

    Ömer Dönmez in Entwicklung eines Automated Valet Parking … (2023)

  4. No Access

    Chapter

    Motivation und Zielsetzung

    Eine Inrix Studie [1] aus dem Jahre 2017 zeigt, dass Kraftfahrzeugführer in Deutschland im Jahr durchschnittlich 41 Stunden damit verbracht haben, einen Parkplatz zu finden. Die zusätzliche Zeit bei der Parkpl...

    Ömer Dönmez in Entwicklung eines Automated Valet Parking … (2023)

  5. No Access

    Chapter

    Anforderungsdefinition, Systementwurf und -eingrenzung

    Mithilfe der vorangegangenen Einführung der fundamentalen Konzepte dieser Arbeit kann das AVP System nun entworfen werden. Anhand der gewonnenen Informationen durch die Untersuchung verschiedener Ansätze zur R...

    Ömer Dönmez in Entwicklung eines Automated Valet Parking … (2023)

  6. No Access

    Chapter

    Darstellung der Simulationsergebnisse

    Die abschließende Darstellung der Simulationsergebnisse zeigt die Funktionsweise des finalen AVP Systems. Zu diesem Zweck wurden verschiedene Szenarien überprüft. Als Zielparkplatz wurden mittlere und äußere P...

    Ömer Dönmez in Entwicklung eines Automated Valet Parking … (2023)

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    Chapter

    Grundlagen und Vorgehensweise

    Dieses Kapitel dient zur Einführung der grundlegenden Aspekte, welche für das Verständnis der darauf folgenden Kapitel notwendig sind. Hierfür werden zunächst AVP Systeme im Allgemeinen definiert, sowie ihre F...

    Ömer Dönmez in Entwicklung eines Automated Valet Parking … (2023)

  8. No Access

    Chapter

    Umsetzung des AVP Systems in der Simulation

    Im Folgenden wird das zuvor entworfene AVP System nun in der Simulation umgesetzt und getestet. Wie in Tabelle 2.2 aus Abschnitt 2.2.2.2 dargestellt wird, wird hierzu die open source Software CARLA verwendet. Hie...

    Ömer Dönmez in Entwicklung eines Automated Valet Parking … (2023)

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    Book

  10. Article

    Open Access

    Global discovery of lupus genetic risk variant allelic enhancer activity

    Genome-wide association studies of Systemic Lupus Erythematosus (SLE) nominate 3073 genetic variants at 91 risk loci. To systematically screen these variants for allelic transcriptional enhancer activity, we c...

    **aoming Lu, **aoting Chen, Carmy Forney, Omer Donmez in Nature Communications (2021)

  11. No Access

    Article

    Negative and positive magnetoresistance in GaInNAs/GaAs modulation-doped quantum well structures

    In this work, magnetoresistance of as-grown and annealed n- and p-type modulation-doped Ga0.68In0.32NyAs1−y/GaAs single quantum well structures with various nitrogen concentrations has been studied. At low tempe...

    Ferhat Nutku, Omer Donmez, Fahrettin Sarcan, Ayşe Erol in Applied Physics A (2015)

  12. Article

    Open Access

    Magnetotransport study on as-grown and annealed n- and p-type modulation-doped GaInNAs/GaAs strained quantum well structures

    We report the observation of thermal annealing- and nitrogen-induced effects on electronic transport properties of as-grown and annealed n- and p-type modulation-doped Ga1 - xIn x ...

    Ömer Dönmez, Fahrettin Sarcan, Ayse Erol, Mustafa Gunes in Nanoscale Research Letters (2014)

  13. Article

    Open Access

    Bismuth-induced effects on optical, lattice vibrational, and structural properties of bulk GaAsBi alloys

    Bulk GaAs1 - xBi x /GaAs alloys with various bismuth compositions are studied using power- and temperature-dependent photoluminescence (PL), Raman scattering, and atomic force mi...

    Fahrettin Sarcan, Ömer Dönmez, Kamuran Kara, Ayse Erol in Nanoscale Research Letters (2014)

  14. Article

    Open Access

    Excitation energy-dependent nature of Raman scattering spectrum in GaInNAs/GaAs quantum well structures

    The excitation energy-dependent nature of Raman scattering spectrum, vibration, electronic or both, has been studied using different excitation sources on as-grown and annealed n- and p-type modulation-doped Ga1 ...

    Ayse Erol, Elif Akalin, Fahrettin Sarcan, Omer Donmez in Nanoscale Research Letters (2012)

  15. Article

    Open Access

    A study of photomodulated reflectance on staircase-like, n-doped GaAs/Al x Ga1−xAs quantum well structures

    In this study, photomodulated reflectance (PR) technique was employed on two different quantum well infrared photodetector (QWIP) structures, which consist of n-doped GaAs quantum wells (QWs) between undoped Al ...

    Omer Donmez, Ferhat Nutku, Ayse Erol, Cetin M Arikan in Nanoscale Research Letters (2012)

  16. Article

    Open Access

    An analysis of Hall mobility in as-grown and annealed n- and p-type modulation-doped GaInNAs/GaAs quantum wells

    In this study, we investigate the effect of annealing and nitrogen amount on electronic transport properties in n- and p-type-doped Ga0.68In0.32N y As1 − y/GaAs quantum well (QW)...

    Fahrettin Sarcan, Omer Donmez, Mustafa Gunes, Ayse Erol in Nanoscale Research Letters (2012)

  17. Article

    Open Access

    The role of dislocation-induced scattering in electronic transport in GaxIn1-xN alloys

    Electronic transport in unintentionally doped GaxIn1-xN alloys with various Ga concentrations (x = 0.06, 0.32 and 0.52) is studied. Hall effect measurements are performed at temperatures between 77 and 300 K. Tem...

    Omer Donmez, Mustafa Gunes, Ayse Erol, Cetin M Arikan in Nanoscale Research Letters (2012)