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  1. Book ; Online: Kleene Star of the Primes is not Regular in Any Base

    Yuen, Jason

    2022  

    Abstract: Let $P_b$ denote the primes expressed in base-$b$. In this note, we prove that $P_b^*$ is not regular. This strengthens a classical result that $P_b$ is not regular, due to Minsky and Papert in 1966. ... Comment: 3 pages; typo ... ...

    Abstract Let $P_b$ denote the primes expressed in base-$b$. In this note, we prove that $P_b^*$ is not regular. This strengthens a classical result that $P_b$ is not regular, due to Minsky and Papert in 1966.

    Comment: 3 pages; typo corrected
    Keywords Computer Science - Formal Languages and Automata Theory ; F.4.3
    Publishing date 2022-03-30
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: What Is the Role of 3D Printing in Undergraduate Anatomy Education? A Scoping Review of Current Literature and Recommendations.

    Yuen, Jason

    Medical science educator

    2020  Volume 30, Issue 3, Page(s) 1321–1329

    Abstract: Introduction: Three-dimensional (3D)-printed models have become increasingly popular as an alternative to the traditional method of cadaveric dissection in teaching anatomy. It has the advantage of lower cost and higher reproducibility. It has been ... ...

    Abstract Introduction: Three-dimensional (3D)-printed models have become increasingly popular as an alternative to the traditional method of cadaveric dissection in teaching anatomy. It has the advantage of lower cost and higher reproducibility. It has been widely used in the postgraduate setting, but its efficacy in undergraduate education has not been studied extensively.
    Objectives: A scoping review of the literature was undertaken systematically to investigate the role of 3D printing in the anatomy education of undergraduate medical students.
    Methods: A systematic literature search of databases (EMBASE, Pubmed, Educational Resources Information Center, British Education Index and Australian Education Index) was undertaken using relevant keywords.
    Results: The search yielded 83 results, which were narrowed down to 13 articles after application of exclusion criteria. The literature supported that 3D printing was a useful tool for studying normal, uncommon and pathological anatomy. However, limitations include low fidelity in replicating the colour and textural physical properties of soft tissues and the trade-off between cost and fidelity.
    Conclusions: It is believed that 3D printing would increasingly be integrated into undergraduate anatomy education, and it might also potentially be used in the assessment of anatomical knowledge and clinical skills training. The establishment of an online 3D model database may facilitate educators to easily manufacture models for specific educational purposes.
    Language English
    Publishing date 2020-06-03
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2156-8650
    ISSN (online) 2156-8650
    DOI 10.1007/s40670-020-00990-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Comparison of Impact Factor, Eigenfactor Metrics, and SCImago Journal Rank Indicator and h-index for Neurosurgical and Spinal Surgical Journals.

    Yuen, Jason

    World neurosurgery

    2018  Volume 119, Page(s) e328–e337

    Abstract: Background: In academic specialties such as neurosurgery, bibliometrics are often used to guide readers, academic institutes, and researchers to make objective assessment of journals. Recently, new indices have been developed to overcome the ... ...

    Abstract Background: In academic specialties such as neurosurgery, bibliometrics are often used to guide readers, academic institutes, and researchers to make objective assessment of journals. Recently, new indices have been developed to overcome the shortcomings of the widely used Impact Factor. The objective of our study was to investigate the correlations among 6 of the commonly used bibliometric indices (Impact Factor, SCImago Journal indicator, SCOPUS h-index, Google h-index, Eigenfactor, Article Influence Score) in neurosurgical and spinal surgical journals.
    Methods: A list of all neurosurgical and spinal surgical journals was compiled using the databases of SCOPUS, Clarivate Analytics (Thomson Reuters), and National Library of Medicine Catalog. Journals that are not surgically oriented, non-English journals, and nursing journals were excluded. Bivariate Spearman ranking correlation tests were performed.
    Results: Fifty-four journals were included, of which 14 were spine themed. High positive correlations were obtained among the bibliometric indices of neurosurgical (nonspinal) journals (P < 0.05 in all pairs). Median values were 1.54, 0.66, 53, 25, 0.0035, and 0.46 for Impact Factor, SCImago Journal rank indicator, SCOPUS h-index, Google h-index, Eigenfactor, and Article Influence Score, respectively. However, the correlations for spinal surgical journals were more variable, likely because of the small sample size.
    Conclusions: Despite the different mathematical basis among the citation-based bibliometric indices studied, they have strong correlations in ranking neurosurgical journals. This study provides evidence that the newer indices may be used interchangeably with the Impact Factor in this context, and they may, theoretically, mitigate some the shortcomings of the Impact Factor.
    MeSH term(s) Bibliometrics ; Journal Impact Factor ; Neurosurgery ; Periodicals as Topic ; Spine/surgery
    Language English
    Publishing date 2018-07-25
    Publishing country United States
    Document type Comparative Study ; Journal Article
    ZDB-ID 2534351-8
    ISSN 1878-8769 ; 1878-8750
    ISSN (online) 1878-8769
    ISSN 1878-8750
    DOI 10.1016/j.wneu.2018.07.144
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: A woman with headache, hemiplegia, and recent toothache.

    Yuen, Jason / Muquit, Samiul

    BMJ (Clinical research ed.)

    2021  Volume 372, Page(s) n10

    MeSH term(s) Brain Abscess/complications ; Brain Abscess/diagnosis ; Female ; Headache/etiology ; Hemiplegia/etiology ; Humans ; Middle Aged ; Streptococcal Infections/complications ; Streptococcal Infections/diagnosis ; Streptococcus intermedius/isolation & purification ; Toothache/complications
    Language English
    Publishing date 2021-01-27
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 1362901-3
    ISSN 1756-1833 ; 0959-8154 ; 0959-8146 ; 0959-8138 ; 0959-535X ; 1759-2151
    ISSN (online) 1756-1833
    ISSN 0959-8154 ; 0959-8146 ; 0959-8138 ; 0959-535X ; 1759-2151
    DOI 10.1136/bmj.n10
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Spinal Aneurysmal Bone Cyst Causing Spinal Cord Compression.

    Yuen, Jason / Folpe, Andrew L / Lehman, Vance T

    Mayo Clinic proceedings

    2022  Volume 97, Issue 2, Page(s) 417–418

    MeSH term(s) Bone Cysts, Aneurysmal/diagnostic imaging ; Bone Cysts, Aneurysmal/surgery ; Embolization, Therapeutic/methods ; Female ; Humans ; Magnetic Resonance Imaging ; Spinal Cord Compression/diagnostic imaging ; Spinal Cord Compression/etiology ; Spinal Cord Compression/surgery ; Tomography, X-Ray Computed ; Young Adult
    Language English
    Publishing date 2022-02-04
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 124027-4
    ISSN 1942-5546 ; 0025-6196
    ISSN (online) 1942-5546
    ISSN 0025-6196
    DOI 10.1016/j.mayocp.2021.11.036
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Ua VI Zs.183: Show issues Location:
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    ab Jg. 2022: Lesesaal (EG)

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  6. Article ; Online: Medical education during the COVID-19 pandemic: perspectives from UK trainees.

    Yuen, Jason / Xie, Fangyi

    Postgraduate medical journal

    2020  Volume 96, Issue 1137, Page(s) 432–433

    MeSH term(s) Betacoronavirus ; COVID-19 ; Coronavirus Infections/epidemiology ; Education, Distance ; Education, Medical, Graduate/methods ; Humans ; Pandemics ; Pneumonia, Viral/epidemiology ; SARS-CoV-2 ; State Medicine ; United Kingdom/epidemiology ; Videoconferencing
    Keywords covid19
    Language English
    Publishing date 2020-05-05
    Publishing country England
    Document type Letter
    ZDB-ID 80325-x
    ISSN 1469-0756 ; 0032-5473
    ISSN (online) 1469-0756
    ISSN 0032-5473
    DOI 10.1136/postgradmedj-2020-137970
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Ua VI Zs.340: Show issues Location:
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  7. Article: Bibliometric Trends in Open Surgical and Endovascular Cerebrovascular Research.

    Yuen, Jason / Jabal, Mohamed Sobhi / Savastano, Luis E / Kallmes, David F

    Cureus

    2022  Volume 14, Issue 5, Page(s) e25204

    Abstract: The last decade has witnessed a major expansion in endovascular interventions concurrent with a contraction of open neurovascular surgeries. Whether research efforts have also shifted from open to endovascular neurosurgery is an effect that has not been ... ...

    Abstract The last decade has witnessed a major expansion in endovascular interventions concurrent with a contraction of open neurovascular surgeries. Whether research efforts have also shifted from open to endovascular neurosurgery is an effect that has not been explored extensively. Understanding the bibliometric trend is important for researchers, funding agencies, and publishing journals. The aim of this review is to explore this potential shift. We compared the bibliometrics of open cerebrovascular and endovascular research articles published in two neurosurgical journals (Journal of Neurosurgery, Neurosurgery) and two neuroradiological journals (Journal of Neurointerventional Surgery, American Journal of Neuroradiology). Data were collected between September 26, 2021, and October 18, 2021. Articles published in 2011, 2013, 2015, 2017, and 2019 from the journals were screened. Neurovascular articles were classified into open surgical, endovascular, or mixed. Bibliometric parameters were collected via SCOPUS and journals' websites. A total of 8,018 articles were screened, of which 1,551 were included (16.2% open, 62.2% endovascular, 21.5% mixed). Most articles were related to aneurysms (76%). Open-access status correlated with increased citations (p<0.001) and Altmetric (p<0.001), which measures online activity. Comparing 2011 and 2019, the article distribution (open/endovascular/mixed) has changed significantly (χ
    Language English
    Publishing date 2022-05-22
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.25204
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Book ; Online: Medical education during the COVID-19 pandemic

    Yuen, Jason / Xie, Fangyi

    perspectives from UK trainees

    2020  

    Keywords Letter ; covid19
    Language English
    Publishing date 2020-07-01 00:00:00.0
    Publisher BMJ Publishing Group Ltd
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Medical education during the COVID-19 pandemic

    Yuen, Jason / Xie, Fangyi

    Postgraduate Medical Journal

    perspectives from UK trainees

    2020  Volume 96, Issue 1137, Page(s) 432–433

    Keywords General Medicine ; covid19
    Language English
    Publisher BMJ
    Publishing country uk
    Document type Article ; Online
    ZDB-ID 80325-x
    ISSN 1469-0756 ; 0032-5473
    ISSN (online) 1469-0756
    ISSN 0032-5473
    DOI 10.1136/postgradmedj-2020-137970
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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    In stock of ZB MED Cologne/Königswinter

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