• Title/Summary/Keyword: Johns Hopkins University

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The Emergence of Research-oriented Department of Mathematics in Johns Hopkins University (1876-1883) (전문 연구 중심의 존스 홉킨스 대학 수학과 설립 (1876-1883))

  • Jung, Won
    • Journal for History of Mathematics
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    • v.33 no.1
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    • pp.21-32
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    • 2020

  • Daniel Coit Gilman, the first president of Johns Hopkins University, aspired to build an ideal university focused on the competent faculty and their research. His plan was carried out through opening the first American graduate program, hiring professors with the highest-level research performances, assigning them less teaching burdens, and encouraging them to actively publish professional journals. He introduced Department of Mathematics as an initial model to put his plan into practice, and James Joseph Sylvester, a British mathematician invited as the first mathematics professor to Johns Hopkins University, made it possible in a short time. Their concerted efforts led to building the Department of Mathematics as a professional research institute for research, higher education, and expert training as well as to publishing American Journal of Mathematics.

  • https://doi.org/10.14477/jhm.2020.33.1.021 인용 PDF KSCI

Common-path Optical Coherence Tomography for Biomedical Imaging and Sensing

  • Kang, Jin-U.;Han, Jae-Ho;Liu, Xuan;Zhang, Kang
    • Journal of the Optical Society of Korea
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    • v.14 no.1
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    • pp.1-13
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    • 2010

  • This paper describes a development of a fiber optic common-path optical coherence tomography (OCT) based imaging and guided system that possess ability to reliably identify optically transparent targets that are on the micron scale; ability to maintain a precise and safe position from the target; ability to provide spectroscopic imaging; ability to imaging biological target in 3-D. The system is based on a high resolution fiber optic Common-Path OCT (CP-OCT) that can be integrated into various mini-probes and tools. The system is capable of obtaining >70K A-scan per second with a resolution better than $3\;{\mu}m$. We have demonstrated that the system is capable of one-dimensional real-time depth tracking, tool motion limiting and motion compensation, oxygen-saturation level imaging, and high resolution 3-D images for various biomedical applications.

  • https://doi.org/10.3807/JOSK.2010.14.1.001 인용 PDF KSCI

Use of custom glenoid components for reverse total shoulder arthroplasty

  • Punyawat Apiwatanakul;Prashant Meshram;Andrew B. Harris;Joel Bervell;Piotr Lukasiewicz;Ridge Maxson;Matthew J. Best;Edward G. McFarland
    • Clinics in Shoulder and Elbow
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    • v.26 no.4
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    • pp.343-350
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    • 2023

  • Background: Our purpose was to evaluate a custom reverse total shoulder arthroplasty glenoid baseplate for severe glenoid deficiency, emphasizing the challenges with this approach, including short-term clinical and radiographic outcomes and complications. Methods: This was a single-institution, retrospective series of 29 patients between January 2017 and December 2022 for whom a custom glenoid component was created for extensive glenoid bone loss. Patients were evaluated preoperatively and at intervals for up to 5 years. All received preoperative physical examinations, plain radiographs, and computed tomography (CT). Intra- and postoperative complications are reported. Results: Of 29 patients, delays resulted in only undergoing surgery, and in three of those, the implant did not match the glenoid. For those three, the time from CT scan to implantation averaged 7.6 months (range, 6.1-10.7 months), compared with 5.5 months (range, 2-8.6 months) for those whose implants fit. In patients with at least 2-year follow-up (n=9), no failures occurred. Significant improvements were observed in all patient-reported outcome measures in those nine patients (American Shoulder and Elbow Score, P<0.01; Simple Shoulder Test, P=0.02; Single Assessment Numeric Evaluation, P<0.01; Western Ontario Osteoarthritis of the Shoulder Index, P<0.01). Range of motion improved for forward flexion and abduction (P=0.03 for both) and internal rotation up the back (P=0.02). Pain and satisfaction also improved (P<0.01 for both). Conclusions: Prolonged time (>6 months) from CT scan to device implantation resulted in bone loss that rendered the implants unusable. Satisfactory short-term radiographic and clinical follow-up can be achieved with a well-fitting device. Level of evidence: III.

  • https://doi.org/10.5397/cise.2023.00563 인용 PDF