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  1. Article ; Online: Calculation of zonal power and astigmatism of a freeform gradient index lens with freeform surfaces.

    Kochan, Nicholas S / Schmidt, Greg R

    Applied optics

    2023  Volume 62, Issue 12, Page(s) 2978–2987

    Abstract: Freeform gradient index (F-GRIN) lenses have been recently shown to enable compact optical design. However, aberration theory is only fully developed for rotationally symmetric distributions with a well-defined optical axis. The F-GRIN has no well- ... ...

    Abstract Freeform gradient index (F-GRIN) lenses have been recently shown to enable compact optical design. However, aberration theory is only fully developed for rotationally symmetric distributions with a well-defined optical axis. The F-GRIN has no well-defined optical axis, and rays are continuously perturbed along their trajectory. Optical performance can be understood without abstracting optical function to numerical evaluation. The present work derives freeform power and astigmatism along an axis through a zone of an F-GRIN lens with freeform surfaces. Zonal power and astigmatism can be assessed without tracing any rays, capturing mixed contributions of the F-GRIN and freeform surface. Theory is compared with a commercial design software numerical raytrace evaluation. The comparison shows that the raytrace-free (RTF) calculation represents all raytrace contributions within a margin of error. In one example, it is demonstrated that linear terms of index and surface alone in an F-GRIN corrector can correct the astigmatism of a tilted spherical mirror. Accounting for the induced effects of the spherical mirror, RTF calculation provides the amount of astigmatism correction of the optimized F-GRIN corrector.
    Language English
    Publishing date 2023-05-03
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.479142
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Life History and Ecology of Acroneuria Carolinensis (Banks) in Panther Creek, Nicholas County, West Virginia (Plecoptera

    D. A. Schmidt / D. C. Tarter

    Psyche: A Journal of Entomology, Vol 92, Iss 4, Pp 393-

    Perlidae)

    1985  Volume 406

    Keywords Zoology ; QL1-991
    Language English
    Publishing date 1985-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Ground state chemical potential of parahydrogen clusters of size N = 21-40.

    Schmidt, Matthew / Roy, Pierre-Nicholas

    The Journal of chemical physics

    2022  Volume 156, Issue 1, Page(s) 16101

    Abstract: We report the ground state chemical potential of parahydrogen clusters between N = 21-40 calculated using the Langevin equation Path Integral Ground State method. There has been much debate in the past whether the chemical potential size evolution in ... ...

    Abstract We report the ground state chemical potential of parahydrogen clusters between N = 21-40 calculated using the Langevin equation Path Integral Ground State method. There has been much debate in the past whether the chemical potential size evolution in this region is jagged (indicating magic number cluster sizes) or if it is smooth (indicating some quantum melting below 1 K). We compare to previous diffusion Monte Carlo and Path Integral Ground State (PIGS) results, including very recent Variational Path Integral Molecular Dynamics (VPIMD) calculations [S. Miura, J. Chem. Phys. 148, 102333 (2018)]. We find that the ground state chemical potential is not a smooth curve and that magic number clusters are present, consistent with VPIMD and PIGS Monte Carlo results.
    Language English
    Publishing date 2022-01-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/5.0076389
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  4. Article ; Online: On the accuracy and efficiency of different methods to calculate Raman vibrational shifts of parahydrogen clusters.

    Schmidt, Matthew / Roy, Pierre-Nicholas

    The Journal of chemical physics

    2022  Volume 156, Issue 8, Page(s) 84102

    Abstract: The Raman vibrational frequency shifts of pure parahydrogen and orthodeuterium clusters of sizes N = 4-9 are calculated using the Langevin equation path integral ground state method. The shifts are calculated using three different methods; the results ... ...

    Abstract The Raman vibrational frequency shifts of pure parahydrogen and orthodeuterium clusters of sizes N = 4-9 are calculated using the Langevin equation path integral ground state method. The shifts are calculated using three different methods; the results obtained from each are compared to experiment and variance properties are assessed. The first method requires the direct calculation of energies from two simulations: one when the cluster is in the v = 0 vibrational state and one when the cluster has v = 1 total quantum of vibration. The shift is directly calculated from the difference in those two energies. The second method requires only a v = 0 simulation to be performed. The ground state energy is calculated as usual and the excited state energy is calculated by using the distribution of the v = 0 simulation and the ratio of the density matrices between the v = 1 state and the v = 0 state. The shift is calculated from the difference in those two energies. These first two are both exact methods. The final method is based on perturbation theory where the shift is calculated by averaging the pairwise difference potential over the pair distribution function. However, this is an approximate approach. It is found that for large enough system sizes, despite the approximations, the perturbation theory method has the strongest balance between accuracy and precision when weighing against computational cost.
    Language English
    Publishing date 2022-03-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/5.0076403
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  5. Article ; Online: Acute Immune Thrombocytopenia following administration of Shingrix recombinant zoster vaccine.

    Schmidt, Nicholas / Maitland, Hillary

    American journal of hematology

    2021  Volume 96, Issue 5, Page(s) E136–E137

    MeSH term(s) Blister/etiology ; Dexamethasone/therapeutic use ; Herpes Zoster Vaccine/adverse effects ; Humans ; Immunoglobulins, Intravenous/therapeutic use ; Male ; Middle Aged ; Oral Hemorrhage/etiology ; Purpura/etiology ; Purpura, Thrombocytopenic, Idiopathic/blood ; Purpura, Thrombocytopenic, Idiopathic/drug therapy ; Purpura, Thrombocytopenic, Idiopathic/etiology ; Purpura, Thrombocytopenic, Idiopathic/therapy ; Thrombocytopenia/blood ; Thrombocytopenia/etiology ; Vaccines, Synthetic/adverse effects
    Chemical Substances Herpes Zoster Vaccine ; Immunoglobulins, Intravenous ; Vaccines, Synthetic ; Dexamethasone (7S5I7G3JQL)
    Language English
    Publishing date 2021-03-11
    Publishing country United States
    Document type Case Reports ; Letter
    ZDB-ID 196767-8
    ISSN 1096-8652 ; 0361-8609
    ISSN (online) 1096-8652
    ISSN 0361-8609
    DOI 10.1002/ajh.26143
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  6. Article ; Online: Neurodynamic Exercises in College Athletes With Musculoskeletal Pain: A Critically Appraised Topic.

    Hattrup, Nicholas / Ohlemeyer, Kacey / Schmidt, Zachary / Gibb, Emily / Pfeifer, Nicholas

    Journal of sport rehabilitation

    2022  Volume 31, Issue 8, Page(s) 1105–1110

    Abstract: Clinical scenario: Pain is a common complaint following an orthopedic injury; however, the exact cause of nociception can be complex. Multiple tissues can generate a patient's complaint of pain, such as the skin, muscle, ligaments, tendon, nerves, and ... ...

    Abstract Clinical scenario: Pain is a common complaint following an orthopedic injury; however, the exact cause of nociception can be complex. Multiple tissues can generate a patient's complaint of pain, such as the skin, muscle, ligaments, tendon, nerves, and bones. Regarding the somatosensory system, inflammation around the nerve can create pain and alter movement coordination; this information has resulted in increased awareness of neurodynamic assessments and exercises. Neurodynamic assessments and exercises provide a unique paradigm to effectively assess and treat neural tissue, which may not commonly be considered within the traditional orthopedic examination.
    Clinical question: In college athletes with musculoskeletal pain and activity impairments, does the use of neurodynamic exercises improve pain or function?
    Summary of key findings: Of the 5 studies, all consisted of chronic injuries with 3 involving upper-extremity pathologies and 2 focusing on lower-extremity pathologies. All 5 studies noted short- and long-term improvement following the incorporation of neurodynamic sliders or tensioners into the treatment plan. Four of the studies had follow-up periods greater than 30 days with sustained improvement on patient outcomes. Only 2 studies described a progression of neurodynamic exercises through sliders and tensioners. Three studies utilized a set/repetition format for exercise prescription, whereas a fourth used a time-based format, and a fifth article utilized both. Finally, 4 studies utilized neurodynamic assessments to identify whether there was a neural component to the patient's presentation (eg, peripheral nerve mechanosensitivity).
    Clinical bottom line: In individuals with musculoskeletal impairments, evidence exists to support the use of neurodynamic exercises, such as sliders and tensioners, to improve pain and pain-related disability when neural sensitivity exists.
    Strength of recommendation: Grade C evidence exists to support the use of neurodynamic exercises in college athletes with a musculoskeletal impairment.
    MeSH term(s) Humans ; Musculoskeletal Pain/therapy ; Exercise Therapy/methods ; Upper Extremity/physiology ; Disabled Persons ; Athletes
    Language English
    Publishing date 2022-09-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1106769-x
    ISSN 1543-3072 ; 1056-6716
    ISSN (online) 1543-3072
    ISSN 1056-6716
    DOI 10.1123/jsr.2021-0268
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  7. Article ; Online: Methodology Applied by a Physician Assistant Program to Evaluate the New ARC-PA 5 th Edition Diversity and Inclusion Standard.

    Rolfs, Jenna / Nicholas, Joyce / Archambault, Mark E / Schmidt, Eric

    The journal of physician assistant education : the official journal of the Physician Assistant Education Association

    2022  Volume 33, Issue 4, Page(s) 313–317

    Abstract: Abstract: Diversity and inclusion in higher education are a top priority for institutions. In 2020, the Accreditation Review Commission on Education for the Physician Assistant (ARC-PA), in its 5 th edition of the Accreditation Standards for Physician ... ...

    Abstract Abstract: Diversity and inclusion in higher education are a top priority for institutions. In 2020, the Accreditation Review Commission on Education for the Physician Assistant (ARC-PA), in its 5 th edition of the Accreditation Standards for Physician Assistant Education, implemented a standard specifically designed to require programs to demonstrate their commitment to diversity and inclusion. Through a protocol-driven methodology, consistent with the ARC-PA's 4 key elements of analysis, one PA program demonstrates and explains how it examines ongoing compliance with diversity and inclusion within their program.
    MeSH term(s) Humans ; Physician Assistants/education ; Cultural Diversity ; Accreditation
    Language English
    Publishing date 2022-11-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2620682-1
    ISSN 1941-9449 ; 1941-9430
    ISSN (online) 1941-9449
    ISSN 1941-9430
    DOI 10.1097/JPA.0000000000000466
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  8. Article ; Online: A Culture of Inquiry: Practice-Based Knowledge for Nurse Leaders.

    Schmidt, Anne / Marshall, David / Raso, Rosanne / Sintich, Maureen / Poch, Nicholas / Joseph, M Lindell

    The Journal of nursing administration

    2024  Volume 54, Issue 4, Page(s) 240–246

    Abstract: A culture of inquiry has not traditionally been associated with nursing leadership. As healthcare evolves, leaders must reevaluate barriers to improving healthcare outcomes. One noted barrier has been a need for more inquisitiveness to innovate. Through ... ...

    Abstract A culture of inquiry has not traditionally been associated with nursing leadership. As healthcare evolves, leaders must reevaluate barriers to improving healthcare outcomes. One noted barrier has been a need for more inquisitiveness to innovate. Through an American Organization for Nursing Leadership workgroup, the authors advanced the understanding of a "culture of inquiry," applying a practice-based learning approach for knowledge development. Three recommended foundational elements are psychological safety, building connections, and using design thinking at all organizational levels.
    MeSH term(s) Humans ; Leadership ; Psychological Safety
    Language English
    Publishing date 2024-03-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 193141-6
    ISSN 1539-0721 ; 1539-073X ; 0002-0443
    ISSN (online) 1539-0721 ; 1539-073X
    ISSN 0002-0443
    DOI 10.1097/NNA.0000000000001416
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  9. Article ; Online: Freeform gradient index generalized Coddington's equations.

    Kochan, Nicholas S / Schmidt, Greg R / Moore, Duncan T

    Journal of the Optical Society of America. A, Optics, image science, and vision

    2022  Volume 39, Issue 4, Page(s) 509–516

    Abstract: Coddington's equations and their generalized forms are useful for lens design and analysis of optical performance. Generalized Coddington's equations (GCE) exist in literature for analysis of decentered systems and freeform surfaces, but not for gradient ...

    Abstract Coddington's equations and their generalized forms are useful for lens design and analysis of optical performance. Generalized Coddington's equations (GCE) exist in literature for analysis of decentered systems and freeform surfaces, but not for gradient index (GRIN) lenses. In this work, GCE are presented for the analysis of freeform GRIN lenses with freeform surfaces. Examples are shown where the presented theory converges on Coddington's equations and known paraxial GRIN behavior. The method also correctly shows known afocal behavior proximate to azimuthally directed rays in a cylindrical GRIN. The latter case is one of analytically validated local freeform behavior.
    Language English
    Publishing date 2022-04-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 283633-6
    ISSN 1520-8532 ; 1084-7529 ; 0740-3232
    ISSN (online) 1520-8532
    ISSN 1084-7529 ; 0740-3232
    DOI 10.1364/JOSAA.446102
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  10. Article ; Online: Replacing optical surfaces with gradient index functions which preserve ray trajectory.

    Kochan, Nicholas S / Schmidt, Greg R / Moore, Duncan T

    Optics letters

    2022  Volume 47, Issue 6, Page(s) 1311–1314

    Abstract: Laws of reflection and refraction between homogeneous media and gradient index (GRIN) ray behavior are both derived from Fermat's principle. Design methods for GRIN can be difficult to analytically develop. This Letter proposes a foundation for complete ... ...

    Abstract Laws of reflection and refraction between homogeneous media and gradient index (GRIN) ray behavior are both derived from Fermat's principle. Design methods for GRIN can be difficult to analytically develop. This Letter proposes a foundation for complete replacement of refracting and total internally reflecting optical interfaces in existing designs with GRIN distribution. The proposed method can aid in incorporating GRIN into existing optical designs. Refraction in GRIN is specified to match the ray striking and leaving the optical interface in both position and angle. This result is shown for a collection of similar GRIN functions. One GRIN function is analyzed over a full space of attainable ray bend angles. A local arbitrarily oriented planar interface is replaced with GRIN distribution, and ray behavior is maintained.
    Language English
    Publishing date 2022-03-15
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.449210
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