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  • Author(s):
    Joseph A Hagmann, Xiang Li, Sugata Chowdhury, Si-Ning Dong, Sergei Rouvimov, Sujitra J Pookpanratana, Kin Man Yu, Tatyana A Orlova, Trudy B Bolin, Carlo U Segre
    Abstract:

    We demonstrate that the introduction of an elemental beam of Mn during the molecular beam epitaxial growth of Bi2Se3 results in the formation of layers of Bi2MnSe4 that intersperse between layers of pure Bi2Se3. This study revises the assumption held by many who study magnetic topological insulators (TIs) that Mn incorporates randomly at Bi-substitutional sites during epitaxial growth of Mn:Bi2Se3. Here, we report the formation of thin film magnetic TI Bi2MnSe4 with stoichiometric composition…

    Date Published:
    2017
  • Author(s):
    Ian M. Sander, Matthew T. McGoldrick, My N. Helms, Aislinn Betts, Anthony van Avermaete, Elizabeth Owers, Evan Doney, Taimi Liepert, Glen Niebur, Douglas Liepert, W. Matthew Leevy
    Abstract:

    Advances in three-dimensional (3D) printing allow for digital files to be turned into a “printed” physical product. For example, complex anatomical models derived from clinical or pre-clinical X-ray computed tomography (CT) data of patients or research specimens can be constructed using various printable materials. Although 3D printing has the potential to advance learning, many academic programs have been slow to adopt its use in the classroom despite increased availability of the equipment …

    Date Published:
    2017
  • Author(s):
    Ryan K. Roeder, Tyler E. Curtis, Prakash D. Nallathamby, Lisa E. Irimata, Tracie L. McGinnity, Lisa E. Cole, Tracy Vargo-Gogola, Karen D. Cowden Dahl
    Abstract:

    Precision imaging is needed to realize precision medicine in cancer detection and treatment. Molecular imaging offers the ability to target and identify tumors, associated abnormalities, and specific cell populations with overexpressed receptors. Nuclear imaging and radionuclide probes provide high sensitivity but subject the patient to a high radiation dose and provide limited spatiotemporal information, requiring combined computed tomography (CT) for anatomic imaging. Therefore, nanoparticl…

    Date Published:
    2017
  • Author(s):
    Justin Ceh, Tom Youd, Zach Mastrovich, Cody Peterson, Sarah Khan, Todd A. Sasser, Ian M. Sander, Justin Doney, Clark Turner, W. Matthew Leevy
    Abstract:

    Radiopacity is a critical property of materials that are used for a range of radiological applications, including the development of phantom devices that emulate the radiodensity of native tissues and the production of protective equipment for personnel handling radioactive materials. Three-dimensional (3D) printing is a fabrication platform that is well suited to creating complex anatomical replicas or custom labware to accomplish these radiological purposes. We created and tested multiple A…

    Date Published:
    2017
  • Author(s):
    D. V. Lebedev, N. A. Kalyuzhnyy, S. A. Mintairov, K. G. Belyaev, M. V. Rakhlin, A. A. Toropov, P. Brunkov, A. S. Vlasov, J. Merz, S. Rouvimov, S. Oktyabrsky, M. Yakimov, I. V. Mukhin, A. V. Shelaev, V. A. Bykov, A. Yu. Romanova, P. A. Buryak, A. M. Mintairov
    Abstract:

    We investigated structural and emission properties of self-organized InP/GaInP quantum dots (QD) grown by metal organic chemical vapor deposition using an amount of deposited In from 7 to 2 monolayers (ML). In the uncapped samples, using atomic force microscopy (AFM), we observed lateral sizes of 100–200 nm, together with a bimodal height distribution having maxima at ∼5 and ∼15 nm, which we denoted as QDs of type A and B, respectively; and reduction of the density of the type-B dots from 4.4…

    Date Published:
    2018
  • Author(s):
    Svetlana Neretina, Arin S. Preston, Robert A. Hughes, Trevor B. Demille
    Abstract:

    Galvanic replacement reactions are widely used in the synthesis of bimetallic nanoshells. Essential to these syntheses is the design of template materials with electrochemical potentials that are low enough to facilitate the replacement of a wide variety of metals. While Cu is an attractive template from this standpoint, it has only rarely been used due to its propensity for oxidation and the associated difficulties in achieving chemically stable colloids. Here, a synthetic scheme is demonstr…

    Date Published:
    2018
  • Author(s):
    Klymenko Y., Kim O., Loughran E., Yang J., Lombard R., Alber M., Stack MS
    Abstract:

    During epithelial ovarian cancer (EOC) progression, intraperitoneally disseminating tumor cells and multicellular aggregates (MCAs) present in ascites fluid adhere to the peritoneum and induce retraction of the peritoneal mesothelial monolayer prior to invasion of the collagen-rich submesothelial matrix and proliferation into macro-metastases. Clinical studies have shown heterogeneity among EOC metastatic units with respect to cadherin expression profiles and invasive behavior; however, the i…

    Date Published:
    2017
  • Author(s):
    M. Sharon Stack, Jing Yang, William C. Kasberg, Angela Celo, Zhong Liang, Kristal Quispe
    Abstract:

    Membrane type 1 matrix metalloproteinase (MT1-MMP, MMP-14) is a transmembrane collagenase highly expressed in metastatic ovarian cancer and correlates with poor survival. Accumulating evidence shows that the cytoplasmic tail of MT1-MMP is subjected to phosphorylation, and this post-translational modification regulates enzymatic activity at the cell surface. To investigate the potential role of MT1-MMP cytoplasmic residue Thr567 phosphorylation in regulation of metastasis-associated behaviors,…

    Date Published:
    2017
  • Author(s):
    Jay A. LaVerne, Patricia Huestis, Carolyn I. Pearce, X. Zhang, Alpha T. N'Diaye, Kevin M. Rosso
    Abstract:

    Aluminum oxyhydroxide (boehmite, AlOOH) and aluminum hydroxide (gibbsite, Al(OH)3) powders with adsorbed water were irradiated with γ-rays and 5 MeV He ions (α-particles) in order to determine overall radiation stability and chemical modification to the surface. No variation in overall phase or crystallinity due to radiolysis was observed with X-ray diffraction (XRD) and Raman spectroscopy for doses up to 2 MGy with γ-rays and 175 MGy with α-particles. Temperature programed desorption (TPD) o…

    Date Published:
    2018
  • Author(s):
    Holly Martin, Jennifer R. Fox, Holly E. Martin
    Abstract:

    The 2017-2018 First Year of Studies’ Anniversary Lecture Series on Advising was designed to celebrate the University of Notre Dame’s First Year of Studies’ dedication to and innovation in the field of undergraduate advising. The presentations in the series were as follows:

    • Introductions to The First Year of Studies Anniversary Lecture Series by Hugh R. Page

    • Not an Easy Place: New Strategies for Helping Anxious Students by Elizabeth Wilcox, September 25, 2017

    • The Architect of Ho…

    Date Published:
    2018-05
  • Author(s):
    Pamela Nolan Young
    Abstract:

    The 2017-2018 First Year of Studies’ Anniversary Lecture Series on Advising was designed to celebrate the University of Notre Dame’s First Year of Studies’ dedication to and innovation in the field of undergraduate advising. The presentations in the series were as follows:

    • Introductions to The First Year of Studies Anniversary Lecture Series by Hugh R. Page

    • Not an Easy Place: New Strategies for Helping Anxious Students by Elizabeth Wilcox, September 25, 2017

    • The Architect of Ho…

    Date Published:
    2018-05
  • Author(s):
    Rene De Vogelaere
    Abstract:

    Hamilton equations are such that the relation, between the coordinates and momenta at time t and at time t 0, is a contact transformation. Methods of integration of Hamilton equations, which do preserve the contact transformation property are given here. These methods are of first and second order. They are given, for the equation x= f(x,t), then for the case of one degree of freedom, then for the general case. Some of the formulae are implicit.

    Date Published:
    1956-04