Peter Vogel
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Vogel
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Peter
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+41 71 224 2379
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  • Publication
    From Venture Idea to Venture Opportunity
    (USASBE, 2017-06)
    Vogel, Peter
    Opportunities are a core construct in the field of entrepreneurship. Despite recent advances suggesting the separation of ideas from opportunities, the field still suffers from conceptual deficiencies. This article builds on this distinction and leverages insights from creativity and innovation management literature to propose a framework that allows tracing the evolution of a venture from first insight to exploitation. It discusses real-time/longitudinal and retrospective measurement techniques from the fields of entrepreneurship, creativity, and innovation management to empirically capture the framework. Several research questions for future studies are provided, concluding with a discussion of implications for research and practice.
    Type: journal article
    Journal: Entrepreneurship Theory and Practice
    Volume: 41
    Issue: 6
    URL: http://onlinelibrary.wiley.com/doi/10.1111/etap.12234/abstract
    DOI: 10.1111/etap.12234
    URI: https://www.alexandria.unisg.ch/handle/20.500.14171/102351
    Scopus© Citations 141
  • Publication
    In vitro assessments of reverse glenoid stability using displacement gages are misleading-Recommendations for accurate measurements of interface micromotion
    (Elsevier Science Ltd., 2011-11)
    Favre, Philippe
    ;
    Perala, Scott
    ;
    Vogel, Peter
    ;
    Fucentese, Sandro
    ;
    Goff, Jonathan
    ;
    Gerber, Christoph
    ;
    Snedeker, Jess
    BACKGROUND: Baseplate micromotion of the reverse shoulder glenoid component can lead to implant loosening. We hypothesized that a remotely positioned displacement gage measures elastic deformation of the system rather than actual micromotion at the implant/bone interface. METHODS: Reverse glenoid components were implanted into polyurethane blocks of 3 different densities. A 700 N compressive load was maintained and a vertical 700 N shear load was applied for 1000 cycles. In addition to the typical gage measurement, a digital image analysis of micromotion at the implant/block interface using high resolution cameras was performed. The measurements were validated on human specimens. A finite element model was implemented to study the isolated effect of block deformation on baseplate displacements. FINDINGS: With the gage, typically reported micromotions were measured. Two orders of magnitude lower micromotions were detected using interface image-based analysis. The finite element simulation showed that elastic deformation alone can cause micromotion magnitudes as measured with displacement gages. Polyurethane blocks of 20 and 15 lbs per cubic foot density best reproduced micromotions as measured on human specimens. INTERPRETATION: We found considerably less relative micromotion at the implant/bone interface than previously assumed. Gage measurements quantify elastic deformation and not true interface micromotion. High resolution digital imaging at the implant/bone interface is strongly recommended for an accurate assessment of reverse glenoid component micromotion. Tests should further adopt 20 or 15 pcf bone test surrogates. Further studies are required to identify the failure modes encountered in vivo, and a corresponding in vitro testing methodology can then be developed.
    Type: journal article
    Journal: Clinical Biomechanics
    Volume: 26
    Issue: 9
    DOI: 10.1016/j.clinbiomech.2011.05.002
    URI: https://www.alexandria.unisg.ch/handle/20.500.14171/93324
    Scopus© Citations 15
  • Publication
    Investigation of Micro-damage in Murine Bone under Dynamic Load
    (Elsevier Science, 2008-07-01)
    Meier, Matias
    ;
    Vogel, Peter
    ;
    Voide, Romain
    ;
    Schneider, Philipp
    ;
    Müller, Ralph
    Type: journal article
    Journal: Journal of Biomechanics
    Volume: 41
    Issue: Supplement 1
    DOI: 10.1016/S0021-9290(08)70076-9
    URI: https://www.alexandria.unisg.ch/handle/20.500.14171/78146