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Filtering by: Creator MacMahan, Jamie H. Remove constraint Creator: MacMahan, Jamie H. Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • Bioactive glass filled resin composites : mechanical properties and resistance to secondary tooth decay

    Creator:
    Khvostenko, Dmytro
    Abstract:
    Dental resin composites are widely used in modern dentistry due to their aesthetic appearance. However, resin based restorations have inferior mechanical properties (fracture is the second reason for restorations replacement) in comparison to alloy based composites and their antimicrobial properties still remain poor, leading to secondary tooth decay development on...
    Resource Type:
    Dissertation
    Full Text:
    Tooth Decay. Abstract approved: ______________________________________________________ Jamie J

  • Mechanistic aspects of fracture and fatigue in resin based dental restorative composites

    Creator:
    Shah, Minalben B.
    Abstract:
    For resin based dental restorative composites, one of the major challenges is to optimize the balance between mechanical and optical properties. Although fracture is the second leading cause of dental restorative failures, very limited mechanistic understanding exists on a microscopic level. In the present study, the fracture properties and mechanisms...
    Resource Type:
    Dissertation
    Full Text:
    approved: Jamie J. Kruzic For resin based dental restorative composites, one of the

  • Youth-Caseworker Relationships and Academic Resilience of Youth in Foster Care

    Creator:
    Jaramillo, Jamie
    Abstract:
    Academic success is a salient domain of youth development and is related to positive lifelong outcomes among youth in foster care. However, youth in foster care experience compounding adversities, including maltreatment and foster care placement itself, which put them at risk of academic disengagement and underachievement. Despite these adversities, academic...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Jamie Jaramillo

  • Functional Materials and Techniques for Additive Manufacturing in Soft Robotics

    Creator:
    Walker, Stephanie
    Abstract:
    This thesis outlines the development of new elastomeric materials and manufacturing processes for soft robotics. Specifically, this work describes the development of custom material formulations for use in additive manufacturing, additive manufacturing processing techniques for silicone elastomers, and multi-component additive manufacturing techniques. Material synthesis and processing is a gap in...
    Resource Type:
    Dissertation
    Full Text:
    am thankful to Dr. Jamie Paik who provided the guidance for my wearable device work. I am

  • Fatigue and fracture of bulk metallic glasses : role of free volume

    Creator:
    Launey, Maximilien E.
    Abstract:
    Deformation of metallic glasses requires the existence of free volume to allow atomic movement under mechanical loading. Accordingly, the present research seeks to understand how free volume variations in alloys of identical compositions affect the fatigue and fracture behavior. By annealing below the glass transition temperature, the free volume of...
    Resource Type:
    Dissertation
    Full Text:
    : Jamie J. Kruzic Deformation of metallic glasses requires the existence of free volume to allo

  • Development and validation of a fatigue reliability method for bridging materials

    Creator:
    Gallops, Sarah
    Abstract:
    Toughened ceramics, or bridging ceramics, are being developed in an attempt to widen the application base of traditional ceramics, which are brittle and have low resistance to crack extension. The crack growth resistance of these extrinsically toughened ceramics has been shown to increase with crack length, and unlike traditional ceramics,...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: Jamie J. Kruzic Toughened ceramics, or bridging ceramics, are being developed in an

  • Fatigue reliability predictions in silicon nitride ceramics based on fatigue behavior, bridging stresses and fracture data

    Creator:
    Greene, Rawley Brandon
    Abstract:
    Because of its attractive material properties like high hardness, high toughness, and excellent high temperature strength, materials like silicon nitride are becoming more common for use in high performance applications. However, there have been limited studies of the fatigue behavior of small cracks in silicon nitride and other materials toughened...
    Resource Type:
    Dissertation
    Full Text:
    Behavior, Bridging Stresses and Fracture Data Abstract approved: Jamie J. Kruzic

  • Crack Penetration and Deflection Behavior at Interfaces

    Creator:
    Alam, Mahabub
    Abstract:
    This study computationally and experimentally examines the mechanisms of crack penetration, deflection and the transition between penetration and deflection. The finite element analysis based computational modeling work used strength-and-energy based cohesive-zone approach to study the effect of dimensionless parameters (e.g., interfacial incident angle, fracture-length scale, and normalized toughness) on penetration/deflection...
    Resource Type:
    Dissertation
    Full Text:
    course I would like to thank my Ph.D. co-supervisor, Jamie Kruzic, who taught me how to design, and

  • The Effect of Surface Finish on Ball Grid Array Lead Free Solder Joints

    Creator:
    Casali, Dick R.
    Abstract:
    As microelectronic parts trend smaller so do their solder joints. The surface finish on a copper pad is expected to become a significant part of the total solder joint volume and therefore affect mechanical properties of the smaller solder joints. Two sample geometries and four different surface finishes for tin-silver-copper...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ Jamie J. Kruzic As microelectronic parts trend smaller so do their solder joints. The surface

  • Disease models and infectious phenotypes of Mycobacterium avium subspecies paratuberculosis

    Creator:
    Everman, Jamie L.
    Abstract:
    Mycobacterium avium subspecies paratuberculosis (MAP) is the causative agent of Johne's disease, a chronic inflammatory bowel disease that affects ruminant populations worldwide. The characteristic stages of the disease make diagnosis difficult, resulting in silent transmission among animals in a herd for years before proper detection of the infection. The extensive...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Jamie L. Everman for the degree of Doctor of Philosophy in