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  1. Article ; Online: Detecting Dark Photons with Reactor Neutrino Experiments.

    Park, H K

    Physical review letters

    2017  Volume 119, Issue 8, Page(s) 81801

    Abstract: We propose to search for light U(1) dark photons, A^{'}, produced via kinetically mixing with ordinary photons via the Compton-like process, γe^{-}→A^{'}e^{-}, in a nuclear reactor and detected by their interactions with the material in the active ... ...

    Abstract We propose to search for light U(1) dark photons, A^{'}, produced via kinetically mixing with ordinary photons via the Compton-like process, γe^{-}→A^{'}e^{-}, in a nuclear reactor and detected by their interactions with the material in the active volumes of reactor neutrino experiments. We derive 95% confidence-level upper limits on ε, the A^{'}-γ mixing parameter, ε, for dark-photon masses below 1 MeV of ε<1.3×10^{-5} and ε<2.1×10^{-5}, from NEOS and TEXONO experimental data, respectively. This study demonstrates the applicability of nuclear reactors as potential sources of intense fluxes of low-mass dark photons.
    Language English
    Publishing date 2017-08-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.119.081801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Clinical characteristics and differences of 802 acral tumours, categorized by anatomical sites.

    Park, H K / Choi, Y D / Yun, S J

    Clinical and experimental dermatology

    2021  Volume 47, Issue 2, Page(s) 312–318

    Abstract: Background: Acral skin tumours are common, but information in the literature regarding their incidence is scarce.: Aim: To investigate the clinical characteristics and differences in incidence of benign and malignant acral tumours by anatomical site.! ...

    Abstract Background: Acral skin tumours are common, but information in the literature regarding their incidence is scarce.
    Aim: To investigate the clinical characteristics and differences in incidence of benign and malignant acral tumours by anatomical site.
    Methods: A retrospective review was conducted of 802 patients with acral skin tumours confirmed by skin biopsy between January 2010 and December 2019. Age, sex, duration, symptoms and sites were obtained from medical records and photographs.
    Results: The mean age of onset was 43.8 years, the male/female ratio was 1 : 1.41, and the mean duration was 68.8 months. Most tumours were asymptomatic (66.7%). In total, 802 acral tumours were identified: 512 (63.8%) were benign and 290 (36.2%) were malignant. The most common benign tumours were benign melanocytic lesions (n = 239), and the most common malignant tumours were melanoma (n = 234). The most common site was the sole (n = 408). Benign melanocytic lesions, melanoma and epidermal cysts were more frequent on the foot, whereas pyogenic granuloma, glomus tumours, haemangiomas and mucous cysts were more frequent on the hand. Glomus tumours, fibromas, mucous cysts and osteomas were more frequent on the nail portion, and benign melanocytic lesions and epidermal cysts were more frequent on the non-nail portion.
    Conclusion: This study reports the incidence of various benign and malignant acral tumours according to site, and we believe the results will be helpful in making a clinical diagnosis.
    MeSH term(s) Adult ; Age of Onset ; Aged ; Child ; Female ; Foot/pathology ; Foot Diseases/pathology ; Hand/pathology ; Humans ; Incidence ; Male ; Middle Aged ; Retrospective Studies ; Skin Neoplasms/pathology
    Language English
    Publishing date 2021-09-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 195504-4
    ISSN 1365-2230 ; 0307-6938
    ISSN (online) 1365-2230
    ISSN 0307-6938
    DOI 10.1111/ced.14885
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A large-aperture strip-grid beam splitter for partially combined two millimeter-wave diagnostics on Korea Superconducting Tokamak Advanced Research.

    Lee, D J / Lee, W / Park, H K / Kim, T G

    The Review of scientific instruments

    2019  Volume 90, Issue 1, Page(s) 14703

    Abstract: A large-aperture beam splitter has been developed for simultaneous operation of two millimeter-wave diagnostics employing different probe beams in the frequency and polarization, microwave imaging reflectometer (∼85 GHz X-mode), and collective scattering ...

    Abstract A large-aperture beam splitter has been developed for simultaneous operation of two millimeter-wave diagnostics employing different probe beams in the frequency and polarization, microwave imaging reflectometer (∼85 GHz X-mode), and collective scattering system (300 GHz O-mode), on the Korea Superconducting Tokamak Advanced Research device. The beam splitter was designed based on a polarizer concept (i.e., grid of metal strips on a thin dielectric sheet), and this can be an optimal solution for these two diagnostics. Fabrication of the strips with uniform sub-millimeter width and spacing on a large dielectric sheet was achieved with an etching technique, and the laboratory test results on the reflection and transmission ratio are in good agreement with design values.
    Language English
    Publishing date 2019-01-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/1.5066611
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Microdecompression in spinal stenosis: a review.

    Park, H K / Chang, J C

    Journal of neurosurgical sciences

    2014  Volume 58, Issue 2, Page(s) 57–64

    Abstract: A goal of surgical treatment is to effectively treat pathology with minimizing injury of normal tissue. Microdecompression techniques are traditionally defined as procedures performed with a small incision using magnification and minimization of ... ...

    Abstract A goal of surgical treatment is to effectively treat pathology with minimizing injury of normal tissue. Microdecompression techniques are traditionally defined as procedures performed with a small incision using magnification and minimization of destruction to non-pathologic tissues. The good candidates are patients diagnosed of spinal stenosis who fail an appropriate course of non-operative management. These patients should have radiographic evidence of localized spinal stenosis without associated structural instability. Various techniques of microdecompression have been introduced until now. Although more technically challenging, microdecompression have produced long-lasting favorable outcomes via proper patient selection and surgeon training. In addition, the minimally invasive access techniques can greaten the results of microdecompression in the acute postoperative period. Through advanced minimally invasive techniques, the microdecompression will evolve in the future for sure.
    MeSH term(s) Cervical Vertebrae/surgery ; Decompression, Surgical/methods ; Foraminotomy/methods ; Humans ; Microsurgery/methods ; Spinal Stenosis/surgery ; Thoracic Vertebrae/surgery
    Language English
    Publishing date 2014-06
    Publishing country Italy
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 193139-8
    ISSN 1827-1855 ; 0390-5616 ; 0026-4881
    ISSN (online) 1827-1855
    ISSN 0390-5616 ; 0026-4881
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Review article COVID-19 public health measures during national assembly elections of the republic of korea

    Kim, E. Y. / Kim, E. K. / Lee, M. / Park, H. K.

    Osong Public Health and Research Perspectives

    Abstract: The general elections for the 21st National Assembly in the Republic of Korea were scheduled for April 15th, 2020, which was during the novel coronavirus disease (COVID-19) outbreak To ensure a safe election, the Korean Centers for Disease Control and ... ...

    Abstract The general elections for the 21st National Assembly in the Republic of Korea were scheduled for April 15th, 2020, which was during the novel coronavirus disease (COVID-19) outbreak To ensure a safe election, the Korean Centers for Disease Control and Prevention (KCDC) recommended several public health measures The KCDC developed key interventions after reviewing the general election strategy that targeted COVID-19 patients and individuals isolating at home Four voters who participated in the election tested positive, but did not contract COVID-19 during voting The results demonstrated that the KCDC minimized the spread of infection in the community during the election The measures implemented by KCDC during the election held under a COVID-19 outbreak cannot be generalized to elections as a whole because cultural and national consciousness vary between countries Nevertheless, it demonstrates that the systemic strategies and applications against the pandemic can minimize the possibility of viral spread © 2020 Korea Centers for Disease Control and Prevention This is an open access article under the CC BY-NC-ND license (http://creativecommons org/licenses/by-nc-nd/4 0/)
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #827097
    Database COVID19

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  6. Article ; Online: Effects of melatonin receptor expression on prognosis and survival in oral squamous cell carcinoma patients.

    Park, H-K / Ryu, M-H / Hwang, D-S / Kim, G-C / Jang, M-A / Kim, U-K

    International journal of oral and maxillofacial surgery

    2021  Volume 51, Issue 6, Page(s) 713–723

    Abstract: Melatonin receptors can inhibit breast and prostate cancers; however, little is known regarding their effects on oral squamous cell carcinoma. In this study, we collected specimens from 81 patients with oral squamous cell carcinoma and analysed ... ...

    Abstract Melatonin receptors can inhibit breast and prostate cancers; however, little is known regarding their effects on oral squamous cell carcinoma. In this study, we collected specimens from 81 patients with oral squamous cell carcinoma and analysed clinicopathological data retrospectively. In addition, the expression of the melatonin receptor was analysed immunohistochemically. Survival rates were calculated using the Kaplan-Meier method and log-rank test. Multivariate analysis was performed based on the Cox proportional-hazards model. Further, an in vitro study was performed using YD15 cells. The cells were transfected with siRNA targeting melatonin receptor 1A and 1B for evaluating the malignancy of melatonin receptors by western blotting, trypan blue-exclusion, colony-forming, wound-healing, and invasion assays. Survival decreased as melatonin receptor expression and clinical and pathological tumour-node-metastasis stages increased. A Cox proportional-hazard model showed that melatonin receptor 1A may serve as a significant predictor of the survival rate of patients with oral squamous cell carcinoma [hazard ratio = 1.423, 95% confidence interval (CI) = 1.019-1.988, p = 0.038]. Melatonin receptor 1A and 1B knockdown significantly suppressed proliferation, migration ability, and invasion ability of YD15 cells in vitro. Our findings reveal that inhibiting melatonin receptor expression may suppress oral squamous cell carcinoma development.
    MeSH term(s) Carcinoma, Squamous Cell/genetics ; Carcinoma, Squamous Cell/metabolism ; Carcinoma, Squamous Cell/therapy ; Head and Neck Neoplasms ; Humans ; Kaplan-Meier Estimate ; Lymphatic Metastasis ; Male ; Melatonin ; Mouth Neoplasms/genetics ; Mouth Neoplasms/therapy ; Prognosis ; Proportional Hazards Models ; Receptors, Melatonin ; Retrospective Studies ; Squamous Cell Carcinoma of Head and Neck
    Chemical Substances Receptors, Melatonin ; Melatonin (JL5DK93RCL)
    Language English
    Publishing date 2021-09-03
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 353721-3
    ISSN 1399-0020 ; 0901-5027
    ISSN (online) 1399-0020
    ISSN 0901-5027
    DOI 10.1016/j.ijom.2021.08.015
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Alitretinoin: treatment for refractory palmoplantar keratoderma.

    Park, H K / Kim, E J / Ko, J Y

    The British journal of dermatology

    2016  Volume 174, Issue 5, Page(s) 1143–1144

    MeSH term(s) Administration, Oral ; Dermatologic Agents/administration & dosage ; Female ; Foot Dermatoses/drug therapy ; Hand Dermatoses/drug therapy ; Humans ; Keratoderma, Palmoplantar/drug therapy ; Treatment Outcome ; Tretinoin/administration & dosage ; Young Adult
    Chemical Substances Dermatologic Agents ; alitretinoin (1UA8E65KDZ) ; Tretinoin (5688UTC01R)
    Language English
    Publishing date 2016-05
    Publishing country England
    Document type Case Reports ; Letter
    ZDB-ID 80076-4
    ISSN 1365-2133 ; 0007-0963
    ISSN (online) 1365-2133
    ISSN 0007-0963
    DOI 10.1111/bjd.14327
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  8. Article: The use of fixed, sensitized, lyophilized erythrocytes for the Middlebrook-Dubos tuberculin test.

    PARK, H K

    Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.)

    2003  Volume 109, Page(s) 156–159

    MeSH term(s) Erythrocytes ; Freeze Drying ; Humans ; Tuberculin ; Tuberculin Test
    Chemical Substances Tuberculin
    Language English
    Publishing date 2003-09-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 4015-0
    ISSN 1535-3699 ; 1525-1373 ; 0037-9727
    ISSN (online) 1535-3699 ; 1525-1373
    ISSN 0037-9727
    DOI 10.3181/00379727-109-27135
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Toxoplasma hemagglutination test. Using alcohol-formalin fixed sensitized lyophilized erythrocytes.

    PARK, H K

    Archives of ophthalmology (Chicago, Ill. : 1960)

    2002  Volume 65, Page(s) 184–191

    MeSH term(s) Alcohols ; Erythrocytes ; Formaldehyde ; Freeze Drying ; Hemagglutination ; Hemagglutination Tests ; Humans ; Toxoplasma ; Toxoplasmosis/diagnosis ; Uveitis/etiology
    Chemical Substances Alcohols ; Formaldehyde (1HG84L3525)
    Language English
    Publishing date 2002-08-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 211580-3
    ISSN 1538-3601 ; 0003-9950 ; 0093-0326
    ISSN (online) 1538-3601
    ISSN 0003-9950 ; 0093-0326
    DOI 10.1001/archopht.1961.01840020186006
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  10. Article: Frequency locking in spatially extended systems.

    Park, H K

    Physical review letters

    2001  Volume 86, Issue 6, Page(s) 1130–1133

    Abstract: A variant of the complex Ginzburg-Landau equation is used to investigate the frequency-locking phenomena in spatially extended systems. With appropriate parameter values, a variety of frequency-locked patterns including flats, pi fronts, labyrinths, and ... ...

    Abstract A variant of the complex Ginzburg-Landau equation is used to investigate the frequency-locking phenomena in spatially extended systems. With appropriate parameter values, a variety of frequency-locked patterns including flats, pi fronts, labyrinths, and 2pi/3 fronts emerge. We show that in spatially extended systems, frequency locking can be enhanced or suppressed by diffusive coupling. Novel patterns such as chaotically bursting domains and target patterns are also observed during the transition to locking.
    Language English
    Publishing date 2001-02-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.86.1130
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