---
_id: '56108'
abstract:
- lang: eng
  text: <jats:title>Abstract</jats:title><jats:p>Engineering projects for complex
    technical systems such as automobiles demand extensive requirement specifications
    and corresponding hierarchy levels in system architectures. Especially when considering
    emergent phenomena, such as total weight or aerodynamics, a closely networked
    collaboration of discipline‐specific and cross‐disciplinary roles is required.
    Further, in large organizations with a group structure, resulting functional and
    non‐functional contents need to be managed by distinct Systems Engineering roles.
    For example, the role “property manager” takes care of achieving overarching product
    properties, such as weight or aerodynamics, which cannot be directly fixed, but
    result from many specifications. This paper proposes new Systems Engineering roles
    and their application in a German Original Equipment Manufacturer (OEM). For validation,
    the roles have already been applied in everyday engineering projects at the OEM.
    The concept proved to be indispensable and transferable to other Systems Engineering
    projects.</jats:p>
author:
- first_name: Iris
  full_name: Gräßler, Iris
  id: '47565'
  last_name: Gräßler
  orcid: 0000-0001-5765-971X
- first_name: Jan Niklas
  full_name: Pfeifer, Jan Niklas
  id: '62841'
  last_name: Pfeifer
- first_name: Florian
  full_name: Hintz, Florian
  last_name: Hintz
- first_name: Nicolas
  full_name: Meyrl, Nicolas
  last_name: Meyrl
citation:
  ama: 'Gräßler I, Pfeifer JN, Hintz F, Meyrl N. Systems Engineering roles to handle
    emergent properties and behaviors in complex technical systems. In: <i>INCOSE
    International Symposium</i>. Vol 34. Wiley; 2024:584-598. doi:<a href="https://doi.org/10.1002/iis2.13164">10.1002/iis2.13164</a>'
  apa: Gräßler, I., Pfeifer, J. N., Hintz, F., &#38; Meyrl, N. (2024). Systems Engineering
    roles to handle emergent properties and behaviors in complex technical systems.
    <i>INCOSE International Symposium</i>, <i>34</i>(1), 584–598. <a href="https://doi.org/10.1002/iis2.13164">https://doi.org/10.1002/iis2.13164</a>
  bibtex: '@inproceedings{Gräßler_Pfeifer_Hintz_Meyrl_2024, title={Systems Engineering
    roles to handle emergent properties and behaviors in complex technical systems},
    volume={34}, DOI={<a href="https://doi.org/10.1002/iis2.13164">10.1002/iis2.13164</a>},
    number={1}, booktitle={INCOSE International Symposium}, publisher={Wiley}, author={Gräßler,
    Iris and Pfeifer, Jan Niklas and Hintz, Florian and Meyrl, Nicolas}, year={2024},
    pages={584–598} }'
  chicago: Gräßler, Iris, Jan Niklas Pfeifer, Florian Hintz, and Nicolas Meyrl. “Systems
    Engineering Roles to Handle Emergent Properties and Behaviors in Complex Technical
    Systems.” In <i>INCOSE International Symposium</i>, 34:584–98. Wiley, 2024. <a
    href="https://doi.org/10.1002/iis2.13164">https://doi.org/10.1002/iis2.13164</a>.
  ieee: 'I. Gräßler, J. N. Pfeifer, F. Hintz, and N. Meyrl, “Systems Engineering roles
    to handle emergent properties and behaviors in complex technical systems,” in
    <i>INCOSE International Symposium</i>, Dublin, Ireland, 2024, vol. 34, no. 1,
    pp. 584–598, doi: <a href="https://doi.org/10.1002/iis2.13164">10.1002/iis2.13164</a>.'
  mla: Gräßler, Iris, et al. “Systems Engineering Roles to Handle Emergent Properties
    and Behaviors in Complex Technical Systems.” <i>INCOSE International Symposium</i>,
    vol. 34, no. 1, Wiley, 2024, pp. 584–98, doi:<a href="https://doi.org/10.1002/iis2.13164">10.1002/iis2.13164</a>.
  short: 'I. Gräßler, J.N. Pfeifer, F. Hintz, N. Meyrl, in: INCOSE International Symposium,
    Wiley, 2024, pp. 584–598.'
conference:
  end_date: 2024-07-06
  location: Dublin, Ireland
  name: 34th Annual INCOSE International Symposium
  start_date: 2024-07-02
date_created: 2024-09-11T08:07:26Z
date_updated: 2024-09-11T08:22:55Z
department:
- _id: '152'
doi: 10.1002/iis2.13164
intvolume: '        34'
issue: '1'
keyword:
- Systems Engineering roles
- properties
- features
- emergent phenomena
- automotive
language:
- iso: eng
page: 584-598
publication: INCOSE International Symposium
publication_identifier:
  issn:
  - 2334-5837
  - 2334-5837
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Systems Engineering roles to handle emergent properties and behaviors in complex
  technical systems
type: conference
user_id: '62841'
volume: 34
year: '2024'
...
---
_id: '49437'
abstract:
- lang: eng
  text: "The phase and TTT diagrams of the Ti-6Al-4V system allow the development
    of a new forming process for a more energy- and materialefficient production of
    sheet metal parts. This new “TISTRAQ” process is composed of two steps. In terms
    of process technology, the first step is comparable to a direct press-hardening
    process already well known for steels. In this step, the Ti-6Al-4V sheet material
    is resistively heated to a temperature below β-transus Tβ and, after a very short
    holding time, simultaneously formed and quenched by use of water cooled tools.
    Thereby, the β phase undergoes a martensitic transformation. The second step is
    a subsequent short-time annealing, which leads to a hardening of the material.
    In this work, a new test rig using resistive heating technique was used in order
    to produce\r\ndifferent solution treated and tool quenched (STQ) and subsequently
    annealed (STA) states. In this paper, the effects of heating rate, solution treatment
    temperature and holding time on microstructure and mechanical properties are addressed.
    For the characterisation, tensile testing and scanning electron microscopy were
    used. By the systematic variation of applied processing parameters, dominating
    effects on microstructure and mechanical properties were evaluated. For example,
    the solution treatment temperature was found to have a significant effect on microstructural
    features and characteristic strength and strain values. The obtained results reveal
    a high potential for future technical applications."
author:
- first_name: Nina
  full_name: Pfeffer, Nina
  last_name: Pfeffer
- first_name: Maximilian Alexander
  full_name: Kaiser, Maximilian Alexander
  id: '72351'
  last_name: Kaiser
  orcid: 0009-0008-1333-3396
- first_name: Thomas
  full_name: Meyer, Thomas
  last_name: Meyer
- first_name: Mathias
  full_name: Göken, Mathias
  last_name: Göken
- first_name: Heinz Werner
  full_name: Höppel, Heinz Werner
  last_name: Höppel
citation:
  ama: 'Pfeffer N, Kaiser MA, Meyer T, Göken M, Höppel HW. The new TISTRAQ process:
    Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal
    part forming - the effect of processing parameters on microstructure and mechanical
    properties. In: <i>IOM3. Chapter 14: Forming, Machining &#38; Joining [Version
    1; Not Peer Reviewed]</i>. doi:<a href="https://doi.org/10.7490/f1000research.1119929.1">https://doi.org/10.7490/f1000research.1119929.1</a>'
  apa: 'Pfeffer, N., Kaiser, M. A., Meyer, T., Göken, M., &#38; Höppel, H. W. (n.d.).
    The new TISTRAQ process: Solution treatment with rapid quenching and annealing
    for Ti-6Al-4V sheet metal part forming - the effect of processing parameters on
    microstructure and mechanical properties. <i>IOM3. Chapter 14: Forming, Machining
    &#38; Joining [Version 1; Not Peer Reviewed]</i>. 15th World Conference on Titanium,
    Edinburgh. <a href="https://doi.org/10.7490/f1000research.1119929.1">https://doi.org/10.7490/f1000research.1119929.1</a>'
  bibtex: '@inproceedings{Pfeffer_Kaiser_Meyer_Göken_Höppel, title={The new TISTRAQ
    process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet
    metal part forming - the effect of processing parameters on microstructure and
    mechanical properties}, DOI={<a href="https://doi.org/10.7490/f1000research.1119929.1">https://doi.org/10.7490/f1000research.1119929.1</a>},
    booktitle={IOM3. Chapter 14: Forming, Machining &#38; Joining [version 1; not
    peer reviewed]}, author={Pfeffer, Nina and Kaiser, Maximilian Alexander and Meyer,
    Thomas and Göken, Mathias and Höppel, Heinz Werner} }'
  chicago: 'Pfeffer, Nina, Maximilian Alexander Kaiser, Thomas Meyer, Mathias Göken,
    and Heinz Werner Höppel. “The New TISTRAQ Process: Solution Treatment with Rapid
    Quenching and Annealing for Ti-6Al-4V Sheet Metal Part Forming - the Effect of
    Processing Parameters on Microstructure and Mechanical Properties.” In <i>IOM3.
    Chapter 14: Forming, Machining &#38; Joining [Version 1; Not Peer Reviewed]</i>,
    n.d. <a href="https://doi.org/10.7490/f1000research.1119929.1">https://doi.org/10.7490/f1000research.1119929.1</a>.'
  ieee: 'N. Pfeffer, M. A. Kaiser, T. Meyer, M. Göken, and H. W. Höppel, “The new
    TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V
    sheet metal part forming - the effect of processing parameters on microstructure
    and mechanical properties,” presented at the 15th World Conference on Titanium,
    Edinburgh, doi: <a href="https://doi.org/10.7490/f1000research.1119929.1">https://doi.org/10.7490/f1000research.1119929.1</a>.'
  mla: 'Pfeffer, Nina, et al. “The New TISTRAQ Process: Solution Treatment with Rapid
    Quenching and Annealing for Ti-6Al-4V Sheet Metal Part Forming - the Effect of
    Processing Parameters on Microstructure and Mechanical Properties.” <i>IOM3. Chapter
    14: Forming, Machining &#38; Joining [Version 1; Not Peer Reviewed]</i>, doi:<a
    href="https://doi.org/10.7490/f1000research.1119929.1">https://doi.org/10.7490/f1000research.1119929.1</a>.'
  short: 'N. Pfeffer, M.A. Kaiser, T. Meyer, M. Göken, H.W. Höppel, in: IOM3. Chapter
    14: Forming, Machining &#38; Joining [Version 1; Not Peer Reviewed], n.d.'
conference:
  end_date: 2023-06-16
  location: Edinburgh
  name: 15th World Conference on Titanium
  start_date: 2023-06-12
date_created: 2023-12-04T11:08:49Z
date_updated: 2025-05-19T11:46:28Z
department:
- _id: '9'
- _id: '321'
- _id: '149'
doi: https://doi.org/10.7490/f1000research.1119929.1
keyword:
- Ti-6Al-4V
- thermomechanical processing
- resistive heating
- quench-forming
- process parameter-microstructure-properties relationship
language:
- iso: eng
publication: 'IOM3. Chapter 14: Forming, Machining & Joining [version 1; not peer
  reviewed]'
publication_status: submitted
status: public
title: 'The new TISTRAQ process: Solution treatment with rapid quenching and annealing
  for Ti-6Al-4V sheet metal part forming - the effect of processing parameters on
  microstructure and mechanical properties'
type: conference
user_id: '72351'
year: '2024'
...
---
_id: '26746'
abstract:
- lang: eng
  text: "Previous research in proof-carrying hardware has established the feasibility
    and utility of the approach, and provided a concrete solution for employing it
    for the certification of functional equivalence checking against a specification,
    but fell short in connecting it to state-of-the-art formal verification insights,
    methods and tools. Due to the immense complexity of modern circuits, and verification
    challenges such as the state explosion problem for sequential circuits, this restriction
    of readily-available verification solutions severely limited the applicability
    of the approach in wider contexts.\r\n\r\nThis thesis closes the gap between the
    PCH approach and current advances in formal hardware verification, provides methods
    and tools to express and certify a wide range of circuit properties, both functional
    and non-functional, and presents for the first time prototypes in which circuits
    that are implemented on actual reconfigurable hardware are verified with PCH methods.
    Using these results, designers can now apply PCH to establish trust in more complex
    circuits, by using more diverse properties which they can express using modern,
    efficient property specification techniques."
- lang: ger
  text: "Die bisherige Forschung zu Proof-Carrying Hardware (PCH) hat dessen Machbarkeit
    und Nützlichkeit gezeigt und einen Ansatz zur Zertifizierung der funktionalen
    Äquivalenz zu einer Spezifikation geliefert, jedoch ohne PCH mit aktuellen Erkenntnissen,
    Methoden oder Werkzeugen formaler Hardwareverifikation zu verknüpfen. Aufgrund
    der Komplexität moderner Schaltungen und Verifikationsherausforderungen wie der
    Zustandsexplosion bei sequentiellen Schaltungen, limitiert diese Einschränkung
    sofort verfügbarer Verifikationslösungen die Anwendbarkeit des Ansatzes in einem
    größeren Kontext signifikant.\r\n\r\nDiese Dissertation schließt die Lücke zwischen
    PCH und modernen Entwicklungen in der Schaltungsverifikation und stellt Methoden
    und Werkzeuge zur Verfügung, welche die Zertifizierung einer großen Bandbreite
    von Schaltungseigenschaften ermöglicht; sowohl funktionale, als auch nicht-funktionale.
    Überdies werden erstmals Prototypen vorgestellt in welchen Schaltungen mittels
    PCH verifiziert werden, die auf tatsächlicher rekonfigurierbarer Hardware realisiert
    sind. Dank dieser Ergebnisse können Entwickler PCH zur Herstellung von Vertrauen
    in weit komplexere Schaltungen verwenden, unter Zuhilfenahme einer größeren Vielfalt
    von Eigenschaften, welche durch moderne, effiziente Spezifikationstechniken ausgedrückt
    werden können."
author:
- first_name: Tobias
  full_name: Wiersema, Tobias
  id: '3118'
  last_name: Wiersema
citation:
  ama: Wiersema T. <i>Guaranteeing Properties of Reconfigurable Hardware Circuits
    with Proof-Carrying Hardware</i>. Paderborn University; 2021.
  apa: Wiersema, T. (2021). <i>Guaranteeing Properties of Reconfigurable Hardware
    Circuits with Proof-Carrying Hardware</i>. Paderborn University.
  bibtex: '@book{Wiersema_2021, place={Paderborn}, title={Guaranteeing Properties
    of Reconfigurable Hardware Circuits with Proof-Carrying Hardware}, publisher={Paderborn
    University}, author={Wiersema, Tobias}, year={2021} }'
  chicago: 'Wiersema, Tobias. <i>Guaranteeing Properties of Reconfigurable Hardware
    Circuits with Proof-Carrying Hardware</i>. Paderborn: Paderborn University, 2021.'
  ieee: 'T. Wiersema, <i>Guaranteeing Properties of Reconfigurable Hardware Circuits
    with Proof-Carrying Hardware</i>. Paderborn: Paderborn University, 2021.'
  mla: Wiersema, Tobias. <i>Guaranteeing Properties of Reconfigurable Hardware Circuits
    with Proof-Carrying Hardware</i>. Paderborn University, 2021.
  short: T. Wiersema, Guaranteeing Properties of Reconfigurable Hardware Circuits
    with Proof-Carrying Hardware, Paderborn University, Paderborn, 2021.
date_created: 2021-10-25T06:35:41Z
date_updated: 2022-01-06T06:57:26Z
ddc:
- '006'
department:
- _id: '78'
keyword:
- Proof-Carrying Hardware
- Formal Verification
- Sequential Circuits
- Non-Functional Properties
- Functional Properties
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://nbn-resolving.de/urn:nbn:de:hbz:466:2-39800
oa: '1'
page: '293'
place: Paderborn
project:
- _id: '1'
  name: SFB 901
- _id: '3'
  name: SFB 901 - Project Area B
- _id: '12'
  name: SFB 901 - Subproject B4
publication_status: published
publisher: Paderborn University
status: public
supervisor:
- first_name: Marco
  full_name: Platzner, Marco
  id: '398'
  last_name: Platzner
title: Guaranteeing Properties of Reconfigurable Hardware Circuits with Proof-Carrying
  Hardware
type: dissertation
user_id: '3118'
year: '2021'
...
---
_id: '12952'
author:
- first_name: Dmitrij
  full_name: Dreiling, Dmitrij
  id: '32616'
  last_name: Dreiling
- first_name: Nadine
  full_name: Feldmann, Nadine
  id: '23082'
  last_name: Feldmann
- first_name: Bernd
  full_name: Henning, Bernd
  id: '213'
  last_name: Henning
citation:
  ama: 'Dreiling D, Feldmann N, Henning B. A DC bias approach to the characterisation
    of non-linear material parameters of piezoelectric ceramics. In: AMA Service GmbH;
    2019. doi:<a href="https://doi.org/10.5162/sensoren2019/5.1.2">10.5162/sensoren2019/5.1.2</a>'
  apa: Dreiling, D., Feldmann, N., &#38; Henning, B. (2019). <i>A DC bias approach
    to the characterisation of non-linear material parameters of piezoelectric ceramics</i>.
    20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019, Nürnberg. <a href="https://doi.org/10.5162/sensoren2019/5.1.2">https://doi.org/10.5162/sensoren2019/5.1.2</a>
  bibtex: '@inproceedings{Dreiling_Feldmann_Henning_2019, title={A DC bias approach
    to the characterisation of non-linear material parameters of piezoelectric ceramics},
    DOI={<a href="https://doi.org/10.5162/sensoren2019/5.1.2">10.5162/sensoren2019/5.1.2</a>},
    publisher={AMA Service GmbH}, author={Dreiling, Dmitrij and Feldmann, Nadine and
    Henning, Bernd}, year={2019} }'
  chicago: Dreiling, Dmitrij, Nadine Feldmann, and Bernd Henning. “A DC Bias Approach
    to the Characterisation of Non-Linear Material Parameters of Piezoelectric Ceramics.”
    AMA Service GmbH, 2019. <a href="https://doi.org/10.5162/sensoren2019/5.1.2">https://doi.org/10.5162/sensoren2019/5.1.2</a>.
  ieee: 'D. Dreiling, N. Feldmann, and B. Henning, “A DC bias approach to the characterisation
    of non-linear material parameters of piezoelectric ceramics,” presented at the
    20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019, Nürnberg, 2019, doi: <a
    href="https://doi.org/10.5162/sensoren2019/5.1.2">10.5162/sensoren2019/5.1.2</a>.'
  mla: Dreiling, Dmitrij, et al. <i>A DC Bias Approach to the Characterisation of
    Non-Linear Material Parameters of Piezoelectric Ceramics</i>. AMA Service GmbH,
    2019, doi:<a href="https://doi.org/10.5162/sensoren2019/5.1.2">10.5162/sensoren2019/5.1.2</a>.
  short: 'D. Dreiling, N. Feldmann, B. Henning, in: AMA Service GmbH, 2019.'
conference:
  end_date: 2019-06-26
  location: Nürnberg
  name: 20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019
  start_date: 2019-06-25
date_created: 2019-08-23T11:02:31Z
date_updated: 2026-01-05T08:28:49Z
department:
- _id: '49'
doi: 10.5162/sensoren2019/5.1.2
keyword:
- piezoelectric materials
- piezoelectric properties
- DC bias field
- non-linear material parameters
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://www.ama-science.org/proceedings/getFile/ZmDmAN
oa: '1'
project:
- _id: '90'
  name: Ein modellbasiertes Messverfahren zur Charakterisierung der frequenzabhängigen
    Materialeigenschaften von Piezokeramiken unter Verwendung eines einzelnen Probekörperindividuums
- _id: '245'
  name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
    für Leistungsschallanwendungen (NEPTUN)'
publisher: AMA Service GmbH
status: public
title: A DC bias approach to the characterisation of non-linear material parameters
  of piezoelectric ceramics
type: conference
user_id: '32616'
year: '2019'
...
---
_id: '9878'
abstract:
- lang: eng
  text: (K,Na)NbO3 ceramics have attracted much attention as lead-free piezoelectric
    materials with high piezoelectric properties. High-quality (K,Na)NbO3 ceramics
    can be sintered using KNbO3 and NaNbO3 powders synthesized by a hydrothermal method.
    In this study, to enhance the quality factor of the ceramics, high-power ultrasonic
    irradiation was employed during the hydrothermal method, which led to a reduction
    in the particle size of the resultant powders.
author:
- first_name: G.
  full_name: Isobe, G.
  last_name: Isobe
- first_name: Takafumi
  full_name: Maeda, Takafumi
  last_name: Maeda
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Takeshi
  full_name: Morita, Takeshi
  last_name: Morita
citation:
  ama: Isobe G, Maeda T, Bornmann P, Hemsel T, Morita T. Synthesis of lead-free piezoelectric
    powders by ultrasonic-assisted hydrothermal method and properties of sintered
    (K0.48Na0.52)NBO3 ceramics. <i>Ultrasonics, Ferroelectrics, and Frequency Control,
    IEEE Transactions on</i>. 2014;61(2):225-230. doi:<a href="https://doi.org/10.1109/TUFFC.2014.6722608">10.1109/TUFFC.2014.6722608</a>
  apa: Isobe, G., Maeda, T., Bornmann, P., Hemsel, T., &#38; Morita, T. (2014). Synthesis
    of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal method
    and properties of sintered (K0.48Na0.52)NBO3 ceramics. <i>Ultrasonics, Ferroelectrics,
    and Frequency Control, IEEE Transactions On</i>, <i>61</i>(2), 225–230. <a href="https://doi.org/10.1109/TUFFC.2014.6722608">https://doi.org/10.1109/TUFFC.2014.6722608</a>
  bibtex: '@article{Isobe_Maeda_Bornmann_Hemsel_Morita_2014, title={Synthesis of lead-free
    piezoelectric powders by ultrasonic-assisted hydrothermal method and properties
    of sintered (K0.48Na0.52)NBO3 ceramics}, volume={61}, DOI={<a href="https://doi.org/10.1109/TUFFC.2014.6722608">10.1109/TUFFC.2014.6722608</a>},
    number={2}, journal={Ultrasonics, Ferroelectrics, and Frequency Control, IEEE
    Transactions on}, author={Isobe, G. and Maeda, Takafumi and Bornmann, Peter and
    Hemsel, Tobias and Morita, Takeshi}, year={2014}, pages={225–230} }'
  chicago: 'Isobe, G., Takafumi Maeda, Peter Bornmann, Tobias Hemsel, and Takeshi
    Morita. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted Hydrothermal
    Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” <i>Ultrasonics,
    Ferroelectrics, and Frequency Control, IEEE Transactions On</i> 61, no. 2 (2014):
    225–30. <a href="https://doi.org/10.1109/TUFFC.2014.6722608">https://doi.org/10.1109/TUFFC.2014.6722608</a>.'
  ieee: G. Isobe, T. Maeda, P. Bornmann, T. Hemsel, and T. Morita, “Synthesis of lead-free
    piezoelectric powders by ultrasonic-assisted hydrothermal method and properties
    of sintered (K0.48Na0.52)NBO3 ceramics,” <i>Ultrasonics, Ferroelectrics, and Frequency
    Control, IEEE Transactions on</i>, vol. 61, no. 2, pp. 225–230, 2014.
  mla: Isobe, G., et al. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted
    Hydrothermal Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” <i>Ultrasonics,
    Ferroelectrics, and Frequency Control, IEEE Transactions On</i>, vol. 61, no.
    2, 2014, pp. 225–30, doi:<a href="https://doi.org/10.1109/TUFFC.2014.6722608">10.1109/TUFFC.2014.6722608</a>.
  short: G. Isobe, T. Maeda, P. Bornmann, T. Hemsel, T. Morita, Ultrasonics, Ferroelectrics,
    and Frequency Control, IEEE Transactions On 61 (2014) 225–230.
date_created: 2019-05-20T13:10:14Z
date_updated: 2019-09-16T10:53:17Z
department:
- _id: '151'
doi: 10.1109/TUFFC.2014.6722608
intvolume: '        61'
issue: '2'
keyword:
- Q-factor
- ceramics
- crystal growth from solution
- particle size
- piezoelectric materials
- potassium compounds
- powders
- sintering
- sodium compounds
- ultrasonic effects
- (K0.48Na0.52)NbO3
- KNbO3 powders
- NaNbO3 powders
- high-power ultrasonic irradiation
- lead-free piezoelectric materials
- lead-free piezoelectric powders
- particle size reduction
- piezoelectric properties
- quality factor
- sintered (K0.48Na0.52)NbO3 ceramics
- sintering
- ultrasonic-assisted hydrothermal method
- Acoustics
- Ceramics
- Lead
- Piezoelectric materials
- Powders
- Radiation effects
- Transducers
language:
- iso: eng
page: 225-230
publication: Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions
  on
publication_identifier:
  issn:
  - 0885-3010
quality_controlled: '1'
status: public
title: Synthesis of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal
  method and properties of sintered (K0.48Na0.52)NBO3 ceramics
type: journal_article
user_id: '55222'
volume: 61
year: '2014'
...
---
_id: '10677'
author:
- first_name: Nam
  full_name: Ho, Nam
  last_name: Ho
- first_name: Paul
  full_name: Kaufmann, Paul
  last_name: Kaufmann
- first_name: Marco
  full_name: Platzner, Marco
  id: '398'
  last_name: Platzner
citation:
  ama: 'Ho N, Kaufmann P, Platzner M. Towards self-adaptive caches: A run-time reconfigurable
    multi-core infrastructure. In: <i>2014 {IEEE} Intl. Conf. on Evolvable Systems
    (ICES)</i>. ; 2014:31-37. doi:<a href="https://doi.org/10.1109/ICES.2014.7008719">10.1109/ICES.2014.7008719</a>'
  apa: 'Ho, N., Kaufmann, P., &#38; Platzner, M. (2014). Towards self-adaptive caches:
    A run-time reconfigurable multi-core infrastructure. In <i>2014 {IEEE} Intl. Conf.
    on Evolvable Systems (ICES)</i> (pp. 31–37). <a href="https://doi.org/10.1109/ICES.2014.7008719">https://doi.org/10.1109/ICES.2014.7008719</a>'
  bibtex: '@inproceedings{Ho_Kaufmann_Platzner_2014, title={Towards self-adaptive
    caches: A run-time reconfigurable multi-core infrastructure}, DOI={<a href="https://doi.org/10.1109/ICES.2014.7008719">10.1109/ICES.2014.7008719</a>},
    booktitle={2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)}, author={Ho, Nam
    and Kaufmann, Paul and Platzner, Marco}, year={2014}, pages={31–37} }'
  chicago: 'Ho, Nam, Paul Kaufmann, and Marco Platzner. “Towards Self-Adaptive Caches:
    A Run-Time Reconfigurable Multi-Core Infrastructure.” In <i>2014 {IEEE} Intl.
    Conf. on Evolvable Systems (ICES)</i>, 31–37, 2014. <a href="https://doi.org/10.1109/ICES.2014.7008719">https://doi.org/10.1109/ICES.2014.7008719</a>.'
  ieee: 'N. Ho, P. Kaufmann, and M. Platzner, “Towards self-adaptive caches: A run-time
    reconfigurable multi-core infrastructure,” in <i>2014 {IEEE} Intl. Conf. on Evolvable
    Systems (ICES)</i>, 2014, pp. 31–37.'
  mla: 'Ho, Nam, et al. “Towards Self-Adaptive Caches: A Run-Time Reconfigurable Multi-Core
    Infrastructure.” <i>2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)</i>, 2014,
    pp. 31–37, doi:<a href="https://doi.org/10.1109/ICES.2014.7008719">10.1109/ICES.2014.7008719</a>.'
  short: 'N. Ho, P. Kaufmann, M. Platzner, in: 2014 {IEEE} Intl. Conf. on Evolvable
    Systems (ICES), 2014, pp. 31–37.'
date_created: 2019-07-10T11:23:00Z
date_updated: 2022-01-06T06:50:49Z
department:
- _id: '78'
doi: 10.1109/ICES.2014.7008719
keyword:
- Linux
- cache storage
- embedded systems
- granular computing
- multiprocessing systems
- reconfigurable architectures
- Leon3 SPARe processor
- custom logic events
- evolvable-self-adaptable processor cache
- fine granular profiling
- integer unit events
- measurement infrastructure
- microarchitectural events
- multicore embedded system
- perf_event standard Linux performance measurement interface
- processor properties
- run-time reconfigurable memory-to-cache address mapping engine
- run-time reconfigurable multicore infrastructure
- split-level caching
- Field programmable gate arrays
- Frequency locked loops
- Irrigation
- Phasor measurement units
- Registers
- Weaving
language:
- iso: eng
page: 31-37
publication: 2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)
status: public
title: 'Towards self-adaptive caches: A run-time reconfigurable multi-core infrastructure'
type: conference
user_id: '3118'
year: '2014'
...
---
_id: '11816'
abstract:
- lang: eng
  text: In this paper, we consider the Maximum Likelihood (ML) estimation of the parameters
    of a GAUSSIAN in the presence of censored, i.e., clipped data. We show that the
    resulting Expectation Maximization (EM) algorithm delivers virtually biasfree
    and efficient estimates, and we discuss its convergence properties. We also discuss
    optimal classification in the presence of censored data. Censored data are frequently
    encountered in wireless LAN positioning systems based on the fingerprinting method
    employing signal strength measurements, due to the limited sensitivity of the
    portable devices. Experiments both on simulated and real-world data demonstrate
    the effectiveness of the proposed algorithms.
author:
- first_name: Manh Kha
  full_name: Hoang, Manh Kha
  last_name: Hoang
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: 'Hoang MK, Haeb-Umbach R. Parameter estimation and classification of censored
    Gaussian data with application to WiFi indoor positioning. In: <i>38th International
    Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>. ; 2013:3721-3725.
    doi:<a href="https://doi.org/10.1109/ICASSP.2013.6638353">10.1109/ICASSP.2013.6638353</a>'
  apa: Hoang, M. K., &#38; Haeb-Umbach, R. (2013). Parameter estimation and classification
    of censored Gaussian data with application to WiFi indoor positioning. In <i>38th
    International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>
    (pp. 3721–3725). <a href="https://doi.org/10.1109/ICASSP.2013.6638353">https://doi.org/10.1109/ICASSP.2013.6638353</a>
  bibtex: '@inproceedings{Hoang_Haeb-Umbach_2013, title={Parameter estimation and
    classification of censored Gaussian data with application to WiFi indoor positioning},
    DOI={<a href="https://doi.org/10.1109/ICASSP.2013.6638353">10.1109/ICASSP.2013.6638353</a>},
    booktitle={38th International Conference on Acoustics, Speech, and Signal Processing
    (ICASSP 2013)}, author={Hoang, Manh Kha and Haeb-Umbach, Reinhold}, year={2013},
    pages={3721–3725} }'
  chicago: Hoang, Manh Kha, and Reinhold Haeb-Umbach. “Parameter Estimation and Classification
    of Censored Gaussian Data with Application to WiFi Indoor Positioning.” In <i>38th
    International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>,
    3721–25, 2013. <a href="https://doi.org/10.1109/ICASSP.2013.6638353">https://doi.org/10.1109/ICASSP.2013.6638353</a>.
  ieee: M. K. Hoang and R. Haeb-Umbach, “Parameter estimation and classification of
    censored Gaussian data with application to WiFi indoor positioning,” in <i>38th
    International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>,
    2013, pp. 3721–3725.
  mla: Hoang, Manh Kha, and Reinhold Haeb-Umbach. “Parameter Estimation and Classification
    of Censored Gaussian Data with Application to WiFi Indoor Positioning.” <i>38th
    International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>,
    2013, pp. 3721–25, doi:<a href="https://doi.org/10.1109/ICASSP.2013.6638353">10.1109/ICASSP.2013.6638353</a>.
  short: 'M.K. Hoang, R. Haeb-Umbach, in: 38th International Conference on Acoustics,
    Speech, and Signal Processing (ICASSP 2013), 2013, pp. 3721–3725.'
date_created: 2019-07-12T05:28:48Z
date_updated: 2022-01-06T06:51:09Z
department:
- _id: '54'
doi: 10.1109/ICASSP.2013.6638353
keyword:
- Gaussian processes
- Global Positioning System
- convergence
- expectation-maximisation algorithm
- fingerprint identification
- indoor radio
- signal classification
- wireless LAN
- EM algorithm
- ML estimation
- WiFi indoor positioning
- censored Gaussian data classification
- clipped data
- convergence properties
- expectation maximization algorithm
- fingerprinting method
- maximum likelihood estimation
- optimal classification
- parameters estimation
- portable devices sensitivity
- signal strength measurements
- wireless LAN positioning systems
- Convergence
- IEEE 802.11 Standards
- Maximum likelihood estimation
- Parameter estimation
- Position measurement
- Training
- Indoor positioning
- censored data
- expectation maximization
- signal strength
- wireless LAN
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2013/HoHa2013.pdf
oa: '1'
page: 3721-3725
publication: 38th International Conference on Acoustics, Speech, and Signal Processing
  (ICASSP 2013)
publication_identifier:
  issn:
  - 1520-6149
related_material:
  link:
  - description: Poster
    relation: supplementary_material
    url: https://groups.uni-paderborn.de/nt/pubs/2013/HoHa2013_Poster.pdf
status: public
title: Parameter estimation and classification of censored Gaussian data with application
  to WiFi indoor positioning
type: conference
user_id: '44006'
year: '2013'
...
---
_id: '13520'
abstract:
- lang: eng
  text: Atomistic simulations in the framework of the density functional theory have
    been used to model morphologic and vibrational properties of lithium niobate–lithium
    tantalate mixed crystals as a function of the [Nb]/[Ta] ratio. Structural parameters
    such as the crystal volume and the lattice parameters a and c vary roughly linearly
    from LiTaO3 to LiNbO3, showing only minor deviations from the Vegard behavior.
    Our ab initio calculations demonstrate that the TO1, TO2 and TO4 vibrational modes
    become harder with increasing Nb concentration. TO3 becomes softer with increasing
    Nb content, instead. Furthermore, the investigated zone center A1 -TO phonon modes
    are characterized by a pronounced stoichiometry dependence. Frequency shifts as
    large as 30 cm−1 are expected as the [Nb]/[Ta] ratio grows from 0 to 1. Therefore,
    spectroscopic techniques sensitive to the A1 modes (such as Raman spectroscopy),
    can be employed for a direct and non-destructive determination of the crystal
    composition.
author:
- first_name: Simone
  full_name: Sanna, Simone
  last_name: Sanna
- first_name: A.
  full_name: Riefer, A.
  last_name: Riefer
- first_name: Sergej
  full_name: Neufeld, Sergej
  id: '23261'
  last_name: Neufeld
- first_name: Wolf Gero
  full_name: Schmidt, Wolf Gero
  id: '468'
  last_name: Schmidt
  orcid: 0000-0002-2717-5076
- first_name: Gerhard
  full_name: Berth, Gerhard
  id: '53'
  last_name: Berth
- first_name: Michael
  full_name: Rüsing, Michael
  id: '22501'
  last_name: Rüsing
  orcid: 0000-0003-4682-4577
- first_name: A.
  full_name: Widhalm, A.
  last_name: Widhalm
- first_name: Artur
  full_name: Zrenner, Artur
  id: '606'
  last_name: Zrenner
  orcid: 0000-0002-5190-0944
citation:
  ama: Sanna S, Riefer A, Neufeld S, et al. Vibrational Fingerprints of LiNbO3-LiTaO3Mixed
    Crystals. <i>Ferroelectrics</i>. 2013;447(1):63-68. doi:<a href="https://doi.org/10.1080/00150193.2013.821893">10.1080/00150193.2013.821893</a>
  apa: Sanna, S., Riefer, A., Neufeld, S., Schmidt, W. G., Berth, G., Rüsing, M.,
    Widhalm, A., &#38; Zrenner, A. (2013). Vibrational Fingerprints of LiNbO3-LiTaO3Mixed
    Crystals. <i>Ferroelectrics</i>, <i>447</i>(1), 63–68. <a href="https://doi.org/10.1080/00150193.2013.821893">https://doi.org/10.1080/00150193.2013.821893</a>
  bibtex: '@article{Sanna_Riefer_Neufeld_Schmidt_Berth_Rüsing_Widhalm_Zrenner_2013,
    title={Vibrational Fingerprints of LiNbO3-LiTaO3Mixed Crystals}, volume={447},
    DOI={<a href="https://doi.org/10.1080/00150193.2013.821893">10.1080/00150193.2013.821893</a>},
    number={1}, journal={Ferroelectrics}, author={Sanna, Simone and Riefer, A. and
    Neufeld, Sergej and Schmidt, Wolf Gero and Berth, Gerhard and Rüsing, Michael
    and Widhalm, A. and Zrenner, Artur}, year={2013}, pages={63–68} }'
  chicago: 'Sanna, Simone, A. Riefer, Sergej Neufeld, Wolf Gero Schmidt, Gerhard Berth,
    Michael Rüsing, A. Widhalm, and Artur Zrenner. “Vibrational Fingerprints of LiNbO3-LiTaO3Mixed
    Crystals.” <i>Ferroelectrics</i> 447, no. 1 (2013): 63–68. <a href="https://doi.org/10.1080/00150193.2013.821893">https://doi.org/10.1080/00150193.2013.821893</a>.'
  ieee: 'S. Sanna <i>et al.</i>, “Vibrational Fingerprints of LiNbO3-LiTaO3Mixed Crystals,”
    <i>Ferroelectrics</i>, vol. 447, no. 1, pp. 63–68, 2013, doi: <a href="https://doi.org/10.1080/00150193.2013.821893">10.1080/00150193.2013.821893</a>.'
  mla: Sanna, Simone, et al. “Vibrational Fingerprints of LiNbO3-LiTaO3Mixed Crystals.”
    <i>Ferroelectrics</i>, vol. 447, no. 1, 2013, pp. 63–68, doi:<a href="https://doi.org/10.1080/00150193.2013.821893">10.1080/00150193.2013.821893</a>.
  short: S. Sanna, A. Riefer, S. Neufeld, W.G. Schmidt, G. Berth, M. Rüsing, A. Widhalm,
    A. Zrenner, Ferroelectrics 447 (2013) 63–68.
date_created: 2019-09-30T13:50:40Z
date_updated: 2023-10-09T08:22:10Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '230'
doi: 10.1080/00150193.2013.821893
intvolume: '       447'
issue: '1'
keyword:
- Ferroelectrics
- vibrational properties
- LiNbO3
- LiTaO3
- mixed crystals
language:
- iso: eng
page: 63-68
project:
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Ferroelectrics
publication_identifier:
  issn:
  - 0015-0193
  - 1563-5112
publication_status: published
status: public
title: Vibrational Fingerprints of LiNbO3-LiTaO3Mixed Crystals
type: journal_article
user_id: '14931'
volume: 447
year: '2013'
...
---
_id: '9783'
abstract:
- lang: eng
  text: To optimize the ultrasound irradiation for cavitation based ultrasound applications
    like sonochemistry or ultrasound cleaning, the correlation between cavitation
    intensity and the resulting effect on the process is of interest. Furthermore,
    changing conditions like temperature and pressure result in varying acoustic properties
    of the liquid. That might necessitate an adaption of the ultrasound irradiation.
    To detect such changes during operation, process monitoring is desired. Labor
    intensive processes, that might be carried out for several hours, also require
    process monitoring to increase their reliability by detection of changes or malfunctions
    during operation. In some applications cavitation detection and monitoring can
    be achieved by the application of sensors in the sound field. Though the application
    of sensors is possible, this necessitates modifications on the system and the
    sensor might disturb the sound field. In other applications harsh, process conditions
    prohibit the application of sensors in the sound field. Therefore alternative
    techniques for cavitation detection and monitoring are desired. The applicability
    of an external microphone and a self-sensing ultrasound transducer for cavitation
    detection were experimentally investigated. Both methods were found to be suitable
    and easily applicable.
author:
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Takafumi
  full_name: Maeda, Takafumi
  last_name: Maeda
- first_name: Takeshi
  full_name: Morita, Takeshi
  last_name: Morita
citation:
  ama: 'Bornmann P, Hemsel T, Sextro W, Maeda T, Morita T. Non-perturbing cavitation
    detection / monitoring in sonochemical reactors. In: <i>Ultrasonics Symposium
    (IUS), 2012 IEEE International</i>. ; 2012:1141-1144. doi:<a href="https://doi.org/10.1109/ULTSYM.2012.0284">10.1109/ULTSYM.2012.0284</a>'
  apa: Bornmann, P., Hemsel, T., Sextro, W., Maeda, T., &#38; Morita, T. (2012). Non-perturbing
    cavitation detection / monitoring in sonochemical reactors. In <i>Ultrasonics
    Symposium (IUS), 2012 IEEE International</i> (pp. 1141–1144). <a href="https://doi.org/10.1109/ULTSYM.2012.0284">https://doi.org/10.1109/ULTSYM.2012.0284</a>
  bibtex: '@inproceedings{Bornmann_Hemsel_Sextro_Maeda_Morita_2012, title={Non-perturbing
    cavitation detection / monitoring in sonochemical reactors}, DOI={<a href="https://doi.org/10.1109/ULTSYM.2012.0284">10.1109/ULTSYM.2012.0284</a>},
    booktitle={Ultrasonics Symposium (IUS), 2012 IEEE International}, author={Bornmann,
    Peter and Hemsel, Tobias and Sextro, Walter and Maeda, Takafumi and Morita, Takeshi},
    year={2012}, pages={1141–1144} }'
  chicago: Bornmann, Peter, Tobias Hemsel, Walter Sextro, Takafumi Maeda, and Takeshi
    Morita. “Non-Perturbing Cavitation Detection / Monitoring in Sonochemical Reactors.”
    In <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>, 1141–44, 2012.
    <a href="https://doi.org/10.1109/ULTSYM.2012.0284">https://doi.org/10.1109/ULTSYM.2012.0284</a>.
  ieee: P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, and T. Morita, “Non-perturbing
    cavitation detection / monitoring in sonochemical reactors,” in <i>Ultrasonics
    Symposium (IUS), 2012 IEEE International</i>, 2012, pp. 1141–1144.
  mla: Bornmann, Peter, et al. “Non-Perturbing Cavitation Detection / Monitoring in
    Sonochemical Reactors.” <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>,
    2012, pp. 1141–44, doi:<a href="https://doi.org/10.1109/ULTSYM.2012.0284">10.1109/ULTSYM.2012.0284</a>.
  short: 'P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, T. Morita, in: Ultrasonics
    Symposium (IUS), 2012 IEEE International, 2012, pp. 1141–1144.'
date_created: 2019-05-13T13:18:49Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2012.0284
keyword:
- cavitation
- chemical reactors
- microphones
- process monitoring
- reliability
- ultrasonic applications
- ultrasonic waves
- acoustic properties
- cavitation based ultrasound applications
- cavitation intensity
- change detection reliability
- external microphone
- malfunction detection reliability
- nonperturbing cavitation detection
- nonperturbing cavitation monitoring
- process monitoring
- self-sensing ultrasound transducer
- sonochemical reactors
- sonochemistry
- ultrasound cleaning
- ultrasound irradiation
- Acoustics
- Liquids
- Monitoring
- Sensors
- Sonar equipment
- Transducers
- Ultrasonic imaging
language:
- iso: eng
page: 1141-1144
publication: Ultrasonics Symposium (IUS), 2012 IEEE International
publication_identifier:
  issn:
  - 1948-5719
quality_controlled: '1'
status: public
title: Non-perturbing cavitation detection / monitoring in sonochemical reactors
type: conference
user_id: '55222'
year: '2012'
...
---
_id: '4380'
abstract:
- lang: eng
  text: The structural and vibrational properties of lithium niobate (LN) – lithium
    tantalate (LT) mixed crystals (LNT, LiNb1-xTaxO3) are investigated over the whole
    composition range by first-principles simulations. The crystal volume grows roughly
    linearly from LT to LN, whereby the lattice parameters a and c show minor deviations
    from the Vegard behavior between the end compounds, LiNbO3 and LiTaO3. Our calculations
    in the framework of the density functional theory show the TO1, TO2 and TO4-modes
    to become harder with increasing Nb concentration. TO3 becomes softer with increasing
    Nb content, instead. The frequency shifts of the zone center A1-TO phonon modes
    for crystals with different compositions are found to be as large as 30 cm-1.
    Raman spectroscopy, which is sensitive to the A1 modes, can be therefore employed
    to determine the crystal composition.
author:
- first_name: Simone
  full_name: Sanna, Simone
  last_name: Sanna
- first_name: Arthur
  full_name: Riefer, Arthur
  last_name: Riefer
- first_name: Sergej
  full_name: Neufeld, Sergej
  last_name: Neufeld
- first_name: Wolf Gero
  full_name: Schmidt, Wolf Gero
  last_name: Schmidt
- first_name: Gerhard
  full_name: Berth, Gerhard
  id: '53'
  last_name: Berth
- first_name: Alex
  full_name: Widhalm, Alex
  last_name: Widhalm
- first_name: Artur
  full_name: Zrenner, Artur
  id: '606'
  last_name: Zrenner
  orcid: 0000-0002-5190-0944
citation:
  ama: 'Sanna S, Riefer A, Neufeld S, et al. Vibrational fingerprints of LiNbO3-LiTaO3
    mixed crystals. In: <i>Proceedings of ISAF-ECAPD-PFM 2012</i>. ; 2012.'
  apa: Sanna, S., Riefer, A., Neufeld, S., Schmidt, W. G., Berth, G., Widhalm, A.,
    &#38; Zrenner, A. (2012). Vibrational fingerprints of LiNbO3-LiTaO3 mixed crystals.
    In <i>Proceedings of ISAF-ECAPD-PFM 2012</i>. Aveiro, Portugal.
  bibtex: '@inproceedings{Sanna_Riefer_Neufeld_Schmidt_Berth_Widhalm_Zrenner_2012,
    title={Vibrational fingerprints of LiNbO3-LiTaO3 mixed crystals}, booktitle={Proceedings
    of ISAF-ECAPD-PFM 2012}, author={Sanna, Simone and Riefer, Arthur and Neufeld,
    Sergej and Schmidt, Wolf Gero and Berth, Gerhard and Widhalm, Alex and Zrenner,
    Artur}, year={2012} }'
  chicago: Sanna, Simone, Arthur Riefer, Sergej Neufeld, Wolf Gero Schmidt, Gerhard
    Berth, Alex Widhalm, and Artur Zrenner. “Vibrational Fingerprints of LiNbO3-LiTaO3
    Mixed Crystals.” In <i>Proceedings of ISAF-ECAPD-PFM 2012</i>, 2012.
  ieee: S. Sanna <i>et al.</i>, “Vibrational fingerprints of LiNbO3-LiTaO3 mixed crystals,”
    in <i>Proceedings of ISAF-ECAPD-PFM 2012</i>, Aveiro, Portugal, 2012.
  mla: Sanna, Simone, et al. “Vibrational Fingerprints of LiNbO3-LiTaO3 Mixed Crystals.”
    <i>Proceedings of ISAF-ECAPD-PFM 2012</i>, 2012.
  short: 'S. Sanna, A. Riefer, S. Neufeld, W.G. Schmidt, G. Berth, A. Widhalm, A.
    Zrenner, in: Proceedings of ISAF-ECAPD-PFM 2012, 2012.'
conference:
  end_date: 2012-07-13
  location: Aveiro, Portugal
  name: 2012 INTERNATIONAL SYMPOSIUM ON APPLICATIONS OF FERROELECTRICS HELD JOINTLY
    WITH 11TH IEEE ECAPD AND IEEE PFM (ISAF/ECAPD/PFM)
  start_date: 2012-07-09
date_created: 2018-09-12T14:32:09Z
date_updated: 2022-01-06T07:01:00Z
department:
- _id: '15'
- _id: '230'
- _id: '35'
keyword:
- Ferroelectrics
- Vibrational properties
- LiNbO3
- LiTaO3
- Mixed Crystals
publication: Proceedings of ISAF-ECAPD-PFM 2012
status: public
title: Vibrational fingerprints of LiNbO3-LiTaO3 mixed crystals
type: conference
user_id: '49428'
year: '2012'
...
---
_id: '13325'
abstract:
- lang: eng
  text: challenge for the digital preservation community. While the methodological
    frameworks for selecting these properties provide a good foundation, a continued
    discussion is necessary for further clarifying and improving the available methods.
    This paper advances earlier work by building on the existing InSPECT framework
    and improving its capabilities of working with complex/compound objects like blogs.
    The modifications enable a more thorough analysis of object structures, accentuate
    the differences and similarities between the framework’s two streams of analysis
    (i.e. Object and Stakeholder analysis) and, subsequently, improve the final reformulation
    of the properties. To demonstrate the applicability of the modified framework,
    thepaper presents a use case of a blog preservation initiative that is informed
    by stakeholder interviews and evaluation of structural and technological foundations
    of blogs. It concludes by discussing the limitations of the approach and suggesting
    directions for future research.
author:
- first_name: Karen
  full_name: Stepanyan, Karen
  last_name: Stepanyan
- first_name: George
  full_name: Gkotsis, George
  last_name: Gkotsis
- first_name: Hendrik
  full_name: Kalb, Hendrik
  last_name: Kalb
- first_name: Yunhyong
  full_name: Kim, Yunhyong
  last_name: Kim
- first_name: 'Alexandra I. '
  full_name: 'Cristea, Alexandra I. '
  last_name: Cristea
- first_name: Mike
  full_name: Joy, Mike
  last_name: Joy
- first_name: Matthias
  full_name: Trier, Matthias
  id: '72744'
  last_name: Trier
- first_name: Seamus
  full_name: Ross, Seamus
  last_name: Ross
citation:
  ama: 'Stepanyan K, Gkotsis G, Kalb H, et al. Blogs as Objects of Preservation: Advancing
    the Discussion on Significant Properties. In: Moore R, Ashley K, Ross S, eds.
    <i>IPress 2012</i>. Canada: University of Toronto Press; 2012:218-224.'
  apa: 'Stepanyan, K., Gkotsis, G., Kalb, H., Kim, Y., Cristea, A. I., Joy, M., …
    Ross, S. (2012). Blogs as Objects of Preservation: Advancing the Discussion on
    Significant Properties. In R. Moore, K. Ashley, &#38; S. Ross (Eds.), <i>iPress
    2012</i> (pp. 218–224). Canada: University of Toronto Press.'
  bibtex: '@inproceedings{Stepanyan_Gkotsis_Kalb_Kim_Cristea_Joy_Trier_Ross_2012,
    place={Canada}, title={Blogs as Objects of Preservation: Advancing the Discussion
    on Significant Properties}, booktitle={iPress 2012}, publisher={University of
    Toronto Press}, author={Stepanyan, Karen and Gkotsis, George and Kalb, Hendrik
    and Kim, Yunhyong and Cristea, Alexandra I.  and Joy, Mike and Trier, Matthias
    and Ross, Seamus}, editor={Moore, Reagan and Ashley, Kevin and Ross, SeamusEditors},
    year={2012}, pages={218–224} }'
  chicago: 'Stepanyan, Karen, George Gkotsis, Hendrik Kalb, Yunhyong Kim, Alexandra
    I.  Cristea, Mike Joy, Matthias Trier, and Seamus Ross. “Blogs as Objects of Preservation:
    Advancing the Discussion on Significant Properties.” In <i>IPress 2012</i>, edited
    by Reagan Moore, Kevin Ashley, and Seamus Ross, 218–24. Canada: University of
    Toronto Press, 2012.'
  ieee: 'K. Stepanyan <i>et al.</i>, “Blogs as Objects of Preservation: Advancing
    the Discussion on Significant Properties,” in <i>iPress 2012</i>, 2012, pp. 218–224.'
  mla: 'Stepanyan, Karen, et al. “Blogs as Objects of Preservation: Advancing the
    Discussion on Significant Properties.” <i>IPress 2012</i>, edited by Reagan Moore
    et al., University of Toronto Press, 2012, pp. 218–24.'
  short: 'K. Stepanyan, G. Gkotsis, H. Kalb, Y. Kim, A.I. Cristea, M. Joy, M. Trier,
    S. Ross, in: R. Moore, K. Ashley, S. Ross (Eds.), IPress 2012, University of Toronto
    Press, Canada, 2012, pp. 218–224.'
date_created: 2019-09-19T12:17:57Z
date_updated: 2022-01-06T06:51:33Z
department:
- _id: '198'
editor:
- first_name: Reagan
  full_name: Moore, Reagan
  last_name: Moore
- first_name: Kevin
  full_name: Ashley, Kevin
  last_name: Ashley
- first_name: Seamus
  full_name: Ross, Seamus
  last_name: Ross
keyword:
- Blogs
- Weblogs
- Digital Preservation
- Significant Properties
language:
- iso: eng
page: 218-224
place: Canada
publication: iPress 2012
publisher: University of Toronto Press
status: public
title: 'Blogs as Objects of Preservation: Advancing the Discussion on Significant
  Properties'
type: conference
user_id: '62809'
year: '2012'
...
---
_id: '9759'
abstract:
- lang: eng
  text: Among various lead-free piezoelectric materials, (K,Na)NbO$_{3}$ is a very
    promising candidate. In this study, (K,Na)NbO$_{3}$ ceramics were sintered from
    mixed (K,Na)NbO$_{3}$ and NaNbO$_{3}$ powders prepared by hydrothermal reaction.
    These two powders were mixed with distilled water in a KNbO$_{3}$/NaNbO$_{3}$
    molar ratio of 1. After sintering the mixed powder, the solid solution of (Na,K)NbO$_{3}$
    ceramics was obtained. The electrical properties such as the electromechanical
    coupling factors k$_{p}$ and k$_{33}$, the mechanical quality factor, Q$_{m}$,
    and the piezoelectric constant d$_{33}$ of the sintered (K,Na)NbO$_{3}$ ceramics
    were 0.32, 0.48, 71 (radial mode), 118 ((33)mode), and 107 pC/N, respectively.
author:
- first_name: Takafumi
  full_name: Maeda, Takafumi
  last_name: Maeda
- first_name: Norihito
  full_name: Takiguchi, Norihito
  last_name: Takiguchi
- first_name: Takeshi
  full_name: Morita, Takeshi
  last_name: Morita
- first_name: Mutsuo
  full_name: Ishikawa, Mutsuo
  last_name: Ishikawa
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
citation:
  ama: Maeda T, Takiguchi N, Morita T, Ishikawa M, Hemsel T. (K,Na)NbO3 lead-free
    piezoelectric ceramics synthesized from hydrothermal powders. <i>Materials Letters</i>.
    2010;64(2):125-128. doi:<a href="https://doi.org/10.1016/j.matlet.2009.10.012">10.1016/j.matlet.2009.10.012</a>
  apa: Maeda, T., Takiguchi, N., Morita, T., Ishikawa, M., &#38; Hemsel, T. (2010).
    (K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders.
    <i>Materials Letters</i>, <i>64</i>(2), 125–128. <a href="https://doi.org/10.1016/j.matlet.2009.10.012">https://doi.org/10.1016/j.matlet.2009.10.012</a>
  bibtex: '@article{Maeda_Takiguchi_Morita_Ishikawa_Hemsel_2010, title={(K,Na)NbO3
    lead-free piezoelectric ceramics synthesized from hydrothermal powders}, volume={64},
    DOI={<a href="https://doi.org/10.1016/j.matlet.2009.10.012">10.1016/j.matlet.2009.10.012</a>},
    number={2}, journal={Materials Letters}, author={Maeda, Takafumi and Takiguchi,
    Norihito and Morita, Takeshi and Ishikawa, Mutsuo and Hemsel, Tobias}, year={2010},
    pages={125–128} }'
  chicago: 'Maeda, Takafumi, Norihito Takiguchi, Takeshi Morita, Mutsuo Ishikawa,
    and Tobias Hemsel. “(K,Na)NbO3 Lead-Free Piezoelectric Ceramics Synthesized from
    Hydrothermal Powders.” <i>Materials Letters</i> 64, no. 2 (2010): 125–28. <a href="https://doi.org/10.1016/j.matlet.2009.10.012">https://doi.org/10.1016/j.matlet.2009.10.012</a>.'
  ieee: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, and T. Hemsel, “(K,Na)NbO3
    lead-free piezoelectric ceramics synthesized from hydrothermal powders,” <i>Materials
    Letters</i>, vol. 64, no. 2, pp. 125–128, 2010.
  mla: Maeda, Takafumi, et al. “(K,Na)NbO3 Lead-Free Piezoelectric Ceramics Synthesized
    from Hydrothermal Powders.” <i>Materials Letters</i>, vol. 64, no. 2, 2010, pp.
    125–28, doi:<a href="https://doi.org/10.1016/j.matlet.2009.10.012">10.1016/j.matlet.2009.10.012</a>.
  short: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, T. Hemsel, Materials Letters
    64 (2010) 125–128.
date_created: 2019-05-13T10:21:17Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.1016/j.matlet.2009.10.012
intvolume: '        64'
issue: '2'
keyword:
- Lead-free piezoelectric material
- (K
- Na)NbO$_{3}$ ceramics
- Sintering solid solution
- Piezoelectric properties
language:
- iso: eng
page: 125-128
publication: Materials Letters
publication_identifier:
  issn:
  - 1948-5719
quality_controlled: '1'
status: public
title: (K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders
type: journal_article
user_id: '55222'
volume: 64
year: '2010'
...
---
_id: '11883'
abstract:
- lang: eng
  text: In this paper, we experimentally evaluate algorithms for velocity estimation
    of a GSM 900 mobile terminal which are based on the analysis of the statistical
    properties of the fast fading process. It is shown how theses statistics can be
    obtained from the training sequences present in downlink transmission bursts without
    establishing an active connection. Realistic simulations of a GSM channel according
    to the COST 207 channel models have been conducted. These models incorporate effects
    like multipath propagation, fading, cochannel interference and additive noise.
    It is shown that velocity estimation by searching for the maximum slope of the
    power density spectrum of the fast fading performs best.
author:
- first_name: Sven
  full_name: Peschke, Sven
  last_name: Peschke
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: 'Peschke S, Haeb-Umbach R. Velocity Estimation of Mobile Terminals by Exploiting
    GSM Downlink Signalling. In: <i>4th Workshop on Positioning Navigation and Communication
    (WPNC 2007)</i>. ; 2007:217-222. doi:<a href="https://doi.org/10.1109/WPNC.2007.353637">10.1109/WPNC.2007.353637</a>'
  apa: Peschke, S., &#38; Haeb-Umbach, R. (2007). Velocity Estimation of Mobile Terminals
    by Exploiting GSM Downlink Signalling. In <i>4th Workshop on Positioning Navigation
    and Communication (WPNC 2007)</i> (pp. 217–222). <a href="https://doi.org/10.1109/WPNC.2007.353637">https://doi.org/10.1109/WPNC.2007.353637</a>
  bibtex: '@inproceedings{Peschke_Haeb-Umbach_2007, title={Velocity Estimation of
    Mobile Terminals by Exploiting GSM Downlink Signalling}, DOI={<a href="https://doi.org/10.1109/WPNC.2007.353637">10.1109/WPNC.2007.353637</a>},
    booktitle={4th Workshop on Positioning Navigation and Communication (WPNC 2007)},
    author={Peschke, Sven and Haeb-Umbach, Reinhold}, year={2007}, pages={217–222}
    }'
  chicago: Peschke, Sven, and Reinhold Haeb-Umbach. “Velocity Estimation of Mobile
    Terminals by Exploiting GSM Downlink Signalling.” In <i>4th Workshop on Positioning
    Navigation and Communication (WPNC 2007)</i>, 217–22, 2007. <a href="https://doi.org/10.1109/WPNC.2007.353637">https://doi.org/10.1109/WPNC.2007.353637</a>.
  ieee: S. Peschke and R. Haeb-Umbach, “Velocity Estimation of Mobile Terminals by
    Exploiting GSM Downlink Signalling,” in <i>4th Workshop on Positioning Navigation
    and Communication (WPNC 2007)</i>, 2007, pp. 217–222.
  mla: Peschke, Sven, and Reinhold Haeb-Umbach. “Velocity Estimation of Mobile Terminals
    by Exploiting GSM Downlink Signalling.” <i>4th Workshop on Positioning Navigation
    and Communication (WPNC 2007)</i>, 2007, pp. 217–22, doi:<a href="https://doi.org/10.1109/WPNC.2007.353637">10.1109/WPNC.2007.353637</a>.
  short: 'S. Peschke, R. Haeb-Umbach, in: 4th Workshop on Positioning Navigation and
    Communication (WPNC 2007), 2007, pp. 217–222.'
date_created: 2019-07-12T05:30:06Z
date_updated: 2022-01-06T06:51:11Z
department:
- _id: '54'
doi: 10.1109/WPNC.2007.353637
keyword:
- additive noise
- cellular radio
- channel estimation
- cochannel interference
- COST 207 channel models
- downlink transmission bursts
- fading channels
- fading process
- GSM downlink signalling
- mobile terminals
- multipath channels
- multipath propagation
- power density spectrum
- statistical analysis
- statistical properties
- telecommunication links
- telecommunication terminals
- velocity estimation
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2007/PeHa07.pdf
oa: '1'
page: 217-222
publication: 4th Workshop on Positioning Navigation and Communication (WPNC 2007)
status: public
title: Velocity Estimation of Mobile Terminals by Exploiting GSM Downlink Signalling
type: conference
user_id: '44006'
year: '2007'
...
---
_id: '9548'
abstract:
- lang: eng
  text: This paper presents a general model based on the electromechanical circuit
    theory. The model is set up as a mechanical equivalent model for base excited
    systems and describes the behaviour of a piezoelectric element around one resonance
    frequency which is sufficient for most practical applications. The model is extended
    to obtain the influence of geometrical and material properties. The derivated
    properties are used to describe the parameters of the general model which is easy
    to handle. Using this model either the calculation of the output power on a specific
    electric load or the determination of the design of the used piezoelectric element
    for a needed electric output power is possible. The paper focuses on the design
    of the ratio of length and width of a piezoelectric bimorph. The validity of the
    model is shown by the comparison of computed and experimental results.
author:
- first_name: Björn
  full_name: Richter, Björn
  last_name: Richter
- first_name: Jens
  full_name: Twiefel, Jens
  last_name: Twiefel
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Jörg
  full_name: Wallaschek, Jörg
  last_name: Wallaschek
citation:
  ama: 'Richter B, Twiefel J, Hemsel T, Wallaschek J. Model based design of piezoelectric
    generators utilizing geometrical and material properties. In: <i>ASME 2006 International
    Mechanical Engineering Congress and Exposition</i>. Chicago, Illinois, USA; 2006.
    doi:<a href="https://doi.org/doi:10.1115/IMECE2006-14862">doi:10.1115/IMECE2006-14862</a>'
  apa: Richter, B., Twiefel, J., Hemsel, T., &#38; Wallaschek, J. (2006). Model based
    design of piezoelectric generators utilizing geometrical and material properties.
    In <i>ASME 2006 International Mechanical Engineering Congress and Exposition</i>.
    Chicago, Illinois, USA. <a href="https://doi.org/doi:10.1115/IMECE2006-14862">https://doi.org/doi:10.1115/IMECE2006-14862</a>
  bibtex: '@inproceedings{Richter_Twiefel_Hemsel_Wallaschek_2006, place={Chicago,
    Illinois, USA}, title={Model based design of piezoelectric generators utilizing
    geometrical and material properties}, DOI={<a href="https://doi.org/doi:10.1115/IMECE2006-14862">doi:10.1115/IMECE2006-14862</a>},
    booktitle={ASME 2006 International Mechanical Engineering Congress and Exposition},
    author={Richter, Björn and Twiefel, Jens and Hemsel, Tobias and Wallaschek, Jörg},
    year={2006} }'
  chicago: Richter, Björn, Jens Twiefel, Tobias Hemsel, and Jörg Wallaschek. “Model
    Based Design of Piezoelectric Generators Utilizing Geometrical and Material Properties.”
    In <i>ASME 2006 International Mechanical Engineering Congress and Exposition</i>.
    Chicago, Illinois, USA, 2006. <a href="https://doi.org/doi:10.1115/IMECE2006-14862">https://doi.org/doi:10.1115/IMECE2006-14862</a>.
  ieee: B. Richter, J. Twiefel, T. Hemsel, and J. Wallaschek, “Model based design
    of piezoelectric generators utilizing geometrical and material properties,” in
    <i>ASME 2006 International Mechanical Engineering Congress and Exposition</i>,
    2006.
  mla: Richter, Björn, et al. “Model Based Design of Piezoelectric Generators Utilizing
    Geometrical and Material Properties.” <i>ASME 2006 International Mechanical Engineering
    Congress and Exposition</i>, 2006, doi:<a href="https://doi.org/doi:10.1115/IMECE2006-14862">doi:10.1115/IMECE2006-14862</a>.
  short: 'B. Richter, J. Twiefel, T. Hemsel, J. Wallaschek, in: ASME 2006 International
    Mechanical Engineering Congress and Exposition, Chicago, Illinois, USA, 2006.'
date_created: 2019-04-29T09:37:45Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '151'
doi: doi:10.1115/IMECE2006-14862
keyword:
- Materials properties
- Design
- Generators
language:
- iso: eng
place: Chicago, Illinois, USA
publication: ASME 2006 International Mechanical Engineering Congress and Exposition
quality_controlled: '1'
status: public
title: Model based design of piezoelectric generators utilizing geometrical and material
  properties
type: conference
user_id: '55222'
year: '2006'
...