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  1. Book ; Online ; Thesis: The Schrödinger functional for Gross-Neveu models

    Leder, Björn

    2007  

    Author's details von Björn Leder
    Language English
    Size Online-Ressource
    Document type Book ; Online ; Thesis
    Thesis / German Habilitation thesis Humboldt-Univ., Diss--Berlin, 2007
    Database Former special subject collection: coastal and deep sea fishing

    Full text online

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  2. Article ; Online: Anterior pelvic plane registration accuracy and cup position measurement using ultrasound- and pointer-based navigation in primary total hip arthroplasty.

    Kiefer, Hartmuth / Löchel, Jannis / Sambo, Keosun / Leder, Björn / Wassilew, Georgi I

    Technology and health care : official journal of the European Society for Engineering and Medicine

    2019  Volume 28, Issue 3, Page(s) 315–323

    Abstract: Background: Incorrect cup positioning in primary total hip arthroplasty is known as a risk factor for early implant failure. The use of navigation systems leads to more accurate cup positioning.: Objective: The aim of this study was to compare the ... ...

    Abstract Background: Incorrect cup positioning in primary total hip arthroplasty is known as a risk factor for early implant failure. The use of navigation systems leads to more accurate cup positioning.
    Objective: The aim of this study was to compare the registration accuracy of the anterior pelvic plane and the measurement accuracy of the definite cup position for a pointer computer-assisted orthopaedic navigation system (P-CAOS) and an ultrasound-based navigation tool (US-CAOS) in an intra-individual study design.
    Methods: Anterior pelvic plane registration was performed in 44 patients receiving a primary total hip arthroplasty with P-CAOS and US-CAOS. The cup implantation was performed using US-CAOS. Intraoperatively, the cup position was assessed using P-CAOS and US-CAOS. The postoperative cup position was determined via CT scan. Inclination and anteversion errors were calculated using intraoperative values and CT data. All operations were performed by a single, high-volume surgeon using a minimally invasive anterolateral approach.
    Results: The mean inclination error was 0.9∘ in the US-CAOS group and -1.1∘ in the P-CAOS group. This was not statistically significant. The mean anteversion error was significantly reduced (p< 0.001) in the US-CAOS group (1.4∘) compared to the P-CAOS group (-8.0∘). Significantly more cups (23 of 44; 52%) in the P-CAOS group were outliers regarding to the defined anteversion error range of 15∘± 10∘. Outliers in the US-CAOS group amounted to two (of 44; 5%) (p< 0.001). The number of outliers regarding the inclination error range of 40∘± 10∘, did not differ significantly between the P-CAOS (2; 5%) and US-CAOS (1; 2%) group.
    Conclusion: We were able to show a systematic anterior pelvic plane registration error in this intraindividual study design. US-CAOS based APP landmark registration showed to be significantly more precise compared to P-CAOS registration. The anteversion error of the cup using US-CAOS showed to be significantly reduced compared to the P-CAOS method.
    MeSH term(s) Aged ; Aged, 80 and over ; Arthroplasty, Replacement, Hip/methods ; Female ; Humans ; Male ; Middle Aged ; Pelvis/anatomy & histology ; Surgery, Computer-Assisted/methods ; Ultrasonography, Interventional/methods
    Language English
    Publishing date 2019-10-28
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1159961-3
    ISSN 1878-7401 ; 0928-7329
    ISSN (online) 1878-7401
    ISSN 0928-7329
    DOI 10.3233/THC-191888
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3846: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  3. Book ; Online: Perturbative renormalisation of the chiral Gross-Neveu model

    Korzec, Tomasz / Leder, Björn

    (DESY ; 05,187)

    2005  

    Author's details B. Leder; T. Korzec
    Series title DESY ; 05,187
    Language English
    Size Online-Ressource (6 S., 379 KB), graph. Darst.
    Publisher Technische Informationsbibliothek u. Universitätsbibliothek ; DESY
    Publishing place Hannover ; Hamburg u.a.
    Document type Book ; Online
    Note Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  4. Article ; Online: Effects of heavy sea quarks at low energies.

    Bruno, Mattia / Finkenrath, Jacob / Knechtli, Francesco / Leder, Björn / Sommer, Rainer

    Physical review letters

    2015  Volume 114, Issue 10, Page(s) 102001

    Abstract: We present a factorization formula for the dependence of light hadron masses and low energy hadronic scales on the mass M of a heavy quark: apart from an overall mass-independent factor Q, ratios such as r_{0}(M)/r_{0}(0) are computable in perturbation ... ...

    Abstract We present a factorization formula for the dependence of light hadron masses and low energy hadronic scales on the mass M of a heavy quark: apart from an overall mass-independent factor Q, ratios such as r_{0}(M)/r_{0}(0) are computable in perturbation theory at large M. The perturbation theory part is stable concerning different loop orders. Our nonperturbative Monte Carlo results obtained in a model calculation, where a doublet of heavy quarks is decoupled, match quantitatively to the perturbative prediction. Upon taking ratios of different hadronic scales at the same mass, the perturbative function drops out and the ratios are given by the decoupled theory up to M^{-2} corrections. We verify-in the continuum limit-that the sea quark effects of quarks with masses around the charm mass are very small in such ratios.
    Language English
    Publishing date 2015-03-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.114.102001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

    Order via subito

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    Inter-library loan at ZB MED

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  5. Conference proceedings: Verbesserte Präzision bei der Pfannenplatzierung durch navigierte Implantation mit Ultraschallregistrierung

    Kiefer, Hartmuth / Sambo, Keosun / Leder, Björn / Wassilew, Georgi

    2016  , Page(s) WI13–1117

    Event/congress Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2016); Berlin; ; Berufsverband der Fachärzte für Orthopädie; 2016
    Keywords Medizin, Gesundheit ; Hüftgelenkersatz ; Navigation ; Ultraschall
    Publishing date 2016-10-10
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/16dkou032
    Database German Medical Science

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  6. Book ; Online ; Thesis: Veränderungen der endokrinen Hodenfunktion und der Fertilität bei rezidivfreien Hodentumorpatienten sechs bis 18 Jahre nach Abschluß der Therapie

    Leder, Björn [Verfasser]

    2005  

    Author's details vorgelegt von Björn Leder
    Keywords Medizin, Gesundheit ; Medicine, Health
    Subject code sg610
    Language German
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

    Full text online

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    Inter-library loan at ZB MED

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  7. Book: Perturbative renormalisation of the chiral Gross-Neveu model

    Leder, Björn / Korzec, Tomasz

    (DESY ; 05,187)

    2005  

    Author's details B. Leder; T. Korzec
    Series title DESY ; 05,187
    Language English
    Size 6 S., graph. Darst., 30 cm
    Publisher DESY
    Publishing place Hamburg u.a.
    Document type Book
    Note Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Database Former special subject collection: coastal and deep sea fishing

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    Inter-library loan at ZB MED

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  8. Book: Perturbative renormalisation of the chiral Gross-Neveu model

    Leder, Björn / Korzec, Tomasz

    (DESY ; 05,187)

    2005  

    Author's details B. Leder; T. Korzec
    Series title DESY ; 05,187
    Language English
    Size 6 S., graph. Darst., 30 cm
    Publisher DESY
    Publishing place Hamburg u.a.
    Document type Book
    Note Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  9. Book ; Online: Cutoff effects in O([Ny]) nonlinear sigma models

    Knechtli, Francesco / Leder, Björn / Wolff, Ulli

    (DESY ; 05,91)

    2005  

    Author's details F. Knechtli; U. Wolff; B. Leder
    Series title DESY ; 05,91
    Language English
    Size Online-Ressource (24 S., 345,0 KB), graph. Darst
    Publisher Technische Informationsbibliothek u. Universitätsbibliothek ; DESY
    Publishing place Hannover ; Zeuthen ;Hamburg
    Document type Book ; Online
    Note Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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    Inter-library loan at ZB MED

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  10. Book: Cutoff effects in O([Ny]) nonlinear sigma models

    Knechtli, Francesco / Leder, Björn / Wolff, Ulli

    (DESY ; 05,091)

    2005  

    Author's details F. Knechtli; U. Wolff; B. Leder
    Series title DESY ; 05,091
    Language English
    Size 22 Sp, graph. Darst, 30 cm
    Publisher DESY
    Publishing place Zeuthen ;Hamburg
    Document type Book
    Note Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Database Former special subject collection: coastal and deep sea fishing

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