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  1. Article: In vivo

    Ahn, Jinhyo / Kong, Eunji / Choe, Kibaek / Song, Eunjoo / Hwang, Yoonha / Seo, Howon / Park, Inwon / Kim, Pilhan

    Biomedical optics express

    2019  Volume 10, Issue 6, Page(s) 2719–2729

    Abstract: ... In ... ...

    Abstract In vivo
    Language English
    Publishing date 2019-05-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2572216-5
    ISSN 2156-7085
    ISSN 2156-7085
    DOI 10.1364/BOE.10.002719
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: A Funnel Type PVDF Underwater Energy Harvester with Spiral Structure Mounted on the Harvester Support.

    Lee, Jongkil / Ahn, Jinhyo / Jin, Hyundu / Lee, Chong Hyun / Jeong, Yoonsang / Lee, Kibae / Seo, Hee-Seon / Cho, Yohan

    Micromachines

    2022  Volume 13, Issue 4

    Abstract: For the purpose of stably supplying electric power to the underwater wireless sensor, the energy harvesting technology in which a voltage is obtained by generating displacement in a piezoelectric material using flow-induced vibration is one of the most ... ...

    Abstract For the purpose of stably supplying electric power to the underwater wireless sensor, the energy harvesting technology in which a voltage is obtained by generating displacement in a piezoelectric material using flow-induced vibration is one of the most attractive research fields. The funnel type energy harvester (FTEH) with PVDF proposed in this study is an energy harvester in which the inlet has a larger cross-sectional area than the outlet and a spiral structure is inserted to generate a vortex flow at the inlet. Based on numerical analysis, when PVDF with L = 100 mm and t = 1 mm was used, the electric power of 39 μW was generated at flow velocity of 0.25 m/s. In experiment the average RMS voltage of FTEH increased by 0.0209 V when the flow velocity increased by 1 m/s. When measured at 0.25 m/s flow velocity for 25 s, it was shown that voltage doubler rectifier (VDR) generated a voltage of 133.4 mV, 2.25 times larger than that of full bridge rectifier (FBR), and the energy charged in the capacitor was 44.3 nJ, 14% higher in VDR than that of the FBR. In addition, the VDR can deliver power of 17.75 μW for 1 kΩ load. It is shown that if the voltage generated by the FTEH using the flow velocity is stored using the VDR electric circuit, it will greatly contribute to the stable power supply of the underwater wireless sensor.
    Language English
    Publishing date 2022-04-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2620864-7
    ISSN 2072-666X
    ISSN 2072-666X
    DOI 10.3390/mi13040579
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Quantitative two-photon microscopy imaging analysis of human skin to evaluate enhanced transdermal delivery by hybrid-type multi-lamellar nanostructure: retraction.

    Ahn, Jinhyo / Kim, Kyeong Hu / Choe, Kibaek / Lim, Joo Hyuck / Lee, Seung Ki / Kim, Yeon Sook / Kim, Pilhan

    Biomedical optics express

    2020  Volume 11, Issue 10, Page(s) 5871

    Abstract: This retracts the article on p. 3974 in vol. 9, PMID: 30338168.]. ...

    Abstract [This retracts the article on p. 3974 in vol. 9, PMID: 30338168.].
    Language English
    Publishing date 2020-09-25
    Publishing country United States
    Document type Retraction of Publication
    ZDB-ID 2572216-5
    ISSN 2156-7085
    ISSN 2156-7085
    DOI 10.1364/BOE.410469
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Intravital imaging of a pulmonary endothelial surface layer in a murine sepsis model.

    Park, Inwon / Choe, Kibaek / Seo, Howon / Hwang, Yoonha / Song, Eunjoo / Ahn, Jinhyo / Hwan Jo, You / Kim, Pilhan

    Biomedical optics express

    2018  Volume 9, Issue 5, Page(s) 2383–2393

    Abstract: Direct intravital imaging of an endothelial surface layer (ESL) in pulmonary microcirculation could be a valuable approach to investigate the role of a vascular endothelial barrier in various pathological conditions. Despite its importance as a marker of ...

    Abstract Direct intravital imaging of an endothelial surface layer (ESL) in pulmonary microcirculation could be a valuable approach to investigate the role of a vascular endothelial barrier in various pathological conditions. Despite its importance as a marker of endothelial cell damage and impairment of the vascular system,
    Language English
    Publishing date 2018-04-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2572216-5
    ISSN 2156-7085
    ISSN 2156-7085
    DOI 10.1364/BOE.9.002383
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Architectural Design and Open Innovation Symbiosis

    JinHyo Joseph Yun / Xiaofei Zhao / Tan Yigitcanlar / DooSeok Lee / HeungJu Ahn

    Sustainability, Vol 10, Iss 12, p

    Insights from Research Campuses, Manufacturing Systems, and Innovation Districts

    2018  Volume 4495

    Abstract: In the age of knowledge-based economies, open innovation has increasing importance. This study aimed to explore the architectural design approaches that can revitalize innovation activities in the era of knowledge-based economies. This paper investigated ...

    Abstract In the age of knowledge-based economies, open innovation has increasing importance. This study aimed to explore the architectural design approaches that can revitalize innovation activities in the era of knowledge-based economies. This paper investigated global case research campuses, manufacturing systems, and innovation districts where architectural design supports innovation activities. This study developed a research framework of architectural design for innovation and applied it in the selected case studies to generate insights. First, the research campuses selected as case studies included Panopticon, DGIST Education and Research Campuses, and Apple Park. Second, the open innovation of manufacturing system architecture was analyzed through the case studies of the Ford Motor Company, Toyota Motor Corporation, and Rolls-Royce Motor Cars. Third, this paper studied the clustered open innovation architectures of Macquarie Park, One North, and Strijp-S Innovation Districts. The findings revealed how tacit knowledge motivates open innovation through the design of manufacturing systems, research campuses, and innovation districts through real examples and mathematical or concept model building.
    Keywords open innovation ; architectural design ; innovation district ; cluster ; research campus ; manufacturing system ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
    Subject code 720
    Language English
    Publishing date 2018-11-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  6. Article: In vivo

    Hwang, Yoonha / Yoon, Hwanjun / Choe, Kibaek / Ahn, Jinhyo / Jung, Jik Han / Park, Ji-Ho / Kim, Pilhan

    Biomedical optics express

    2017  Volume 8, Issue 10, Page(s) 4706–4716

    Abstract: Indocyanine green (ICG) is a near-infrared fluorophore approved for human use which has been widely used for various clinical applications. Despite the well-established clinical usage, our understanding about the ... ...

    Abstract Indocyanine green (ICG) is a near-infrared fluorophore approved for human use which has been widely used for various clinical applications. Despite the well-established clinical usage, our understanding about the microscopic
    Language English
    Publishing date 2017-09-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2572216-5
    ISSN 2156-7085
    ISSN 2156-7085
    DOI 10.1364/BOE.8.004706
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Architectural Design and Open Innovation Symbiosis: Insights from Research Campuses, Manufacturing Systems, and Innovation Districts

    Yun, JinHyo Joseph / Ahn, HeungJu / Lee, DooSeok / Yigitcanlar, Tan / Zhao, Xiaofei

    Sustainability. 2018 Nov. 29, v. 10, no. 12

    2018  

    Abstract: In the age of knowledge-based economies, open innovation has increasing importance. This study aimed to explore the architectural design approaches that can revitalize innovation activities in the era of knowledge-based economies. This paper investigated ...

    Abstract In the age of knowledge-based economies, open innovation has increasing importance. This study aimed to explore the architectural design approaches that can revitalize innovation activities in the era of knowledge-based economies. This paper investigated global case research campuses, manufacturing systems, and innovation districts where architectural design supports innovation activities. This study developed a research framework of architectural design for innovation and applied it in the selected case studies to generate insights. First, the research campuses selected as case studies included Panopticon, DGIST Education and Research Campuses, and Apple Park. Second, the open innovation of manufacturing system architecture was analyzed through the case studies of the Ford Motor Company, Toyota Motor Corporation, and Rolls-Royce Motor Cars. Third, this paper studied the clustered open innovation architectures of Macquarie Park, One North, and Strijp-S Innovation Districts. The findings revealed how tacit knowledge motivates open innovation through the design of manufacturing systems, research campuses, and innovation districts through real examples and mathematical or concept model building.
    Keywords automobiles ; case studies ; education ; manufacturing ; models
    Language English
    Dates of publication 2018-1129
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2518383-7
    ISSN 2071-1050
    ISSN 2071-1050
    DOI 10.3390/su10124495
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Frequency selection rule for high definition and high frame rate Lissajous scanning

    Kyungmin Hwang / Yeong-Hyeon Seo / Jinhyo Ahn / Pilhan Kim / Ki-Hun Jeong

    Scientific Reports, Vol 7, Iss 1, Pp 1-

    2017  Volume 8

    Abstract: Abstract Lissajous microscanners are very attractive in compact laser scanning applications such as endomicroscopy or pro-projection display owing to high mechanical stability and low operating voltages. The scanning frequency serves as a critical factor ...

    Abstract Abstract Lissajous microscanners are very attractive in compact laser scanning applications such as endomicroscopy or pro-projection display owing to high mechanical stability and low operating voltages. The scanning frequency serves as a critical factor for determining the scanning imaging quality. Here we report the selection rule of scanning frequencies that can realize high definition and high frame-rate (HDHF) full-repeated Lissajous scanning imaging. The fill factor (FF) monotonically increases with the total lobe number of a Lissajous curve, i.e., the sum of scanning frequencies divided by the great common divisor (GCD) of bi-axial scanning frequencies. The frames per second (FPS), called the pattern repeated rate or the frame rate, linearly increases with GCD. HDHF Lissajous scanning is achieved at the bi-axial scanning frequencies, where the GCD has the maximum value among various sets of the scanning frequencies satisfying the total lobe number for a target FF. Based on this selection rule, the experimental results clearly demonstrate that conventional Lissajous scanners substantially increase both FF and FPS by slightly modulating the scanning frequencies at near the resonance within the resonance bandwidth of a Lissajous scanner. This selection rule provides a new guideline for HDHF Lissajous scanning in compact laser scanning systems.
    Keywords Medicine ; R ; Science ; Q
    Subject code 600
    Language English
    Publishing date 2017-10-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  9. Article ; Online: Frequency selection rule for high definition and high frame rate Lissajous scanning.

    Hwang, Kyungmin / Seo, Yeong-Hyeon / Ahn, Jinhyo / Kim, Pilhan / Jeong, Ki-Hun

    Scientific reports

    2017  Volume 7, Issue 1, Page(s) 14075

    Abstract: Lissajous microscanners are very attractive in compact laser scanning applications such as endomicroscopy or pro-projection display owing to high mechanical stability and low operating voltages. The scanning frequency serves as a critical factor for ... ...

    Abstract Lissajous microscanners are very attractive in compact laser scanning applications such as endomicroscopy or pro-projection display owing to high mechanical stability and low operating voltages. The scanning frequency serves as a critical factor for determining the scanning imaging quality. Here we report the selection rule of scanning frequencies that can realize high definition and high frame-rate (HDHF) full-repeated Lissajous scanning imaging. The fill factor (FF) monotonically increases with the total lobe number of a Lissajous curve, i.e., the sum of scanning frequencies divided by the great common divisor (GCD) of bi-axial scanning frequencies. The frames per second (FPS), called the pattern repeated rate or the frame rate, linearly increases with GCD. HDHF Lissajous scanning is achieved at the bi-axial scanning frequencies, where the GCD has the maximum value among various sets of the scanning frequencies satisfying the total lobe number for a target FF. Based on this selection rule, the experimental results clearly demonstrate that conventional Lissajous scanners substantially increase both FF and FPS by slightly modulating the scanning frequencies at near the resonance within the resonance bandwidth of a Lissajous scanner. This selection rule provides a new guideline for HDHF Lissajous scanning in compact laser scanning systems.
    Language English
    Publishing date 2017-10-26
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-017-13634-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Quantitative two-photon microscopy imaging analysis of human skin to evaluate enhanced transdermal delivery by hybrid-type multi-lamellar nanostructure.

    Ahn, Jinhyo / Kim, Kyeong Hu / Choe, Kibaek / Lim, Joo Hyuck / Lee, Seung Ki / Kim, Yeon Sook / Kim, Pilhan

    publication RETRACTED

    Biomedical optics express

    2018  Volume 9, Issue 8, Page(s) 3974–3982

    Abstract: Transdermal skin delivery is a method to transport various topical formulations to a deeper skin layer non-invasively. Permeability analysis of many delivering agents has been mostly conducted by a simple tape stripping method. However, it cannot reveal ... ...

    Abstract Transdermal skin delivery is a method to transport various topical formulations to a deeper skin layer non-invasively. Permeability analysis of many delivering agents has been mostly conducted by a simple tape stripping method. However, it cannot reveal a detailed depth-dependent distribution profile of transdermally delivered agents in the skin. In this work, we achieved a cellular-level depth-defined visualization of fluorophore-labelled human epidermal growth factor (EGF) transdermally delivered to human skin by using encapsulation with common liposomes and newly fabricated multi-lamellar nanostructures using a custom-design two-photon microscopy system. It was able to generate 3D reconstructed images displaying the distribution of human EGF inside the human skin sample with high-resolution. Based on a depthwise fluorescence intensity profile showing the permeation of human EGF, a quantitative analysis was performed to assess the transdermal delivery efficacy achieved by each formulation, showing a significant improvement of the efficacy with the utilization of multi-lamellar nanostructure.
    Language English
    Publishing date 2018-07-31
    Publishing country United States
    Document type Journal Article ; Retracted Publication
    ZDB-ID 2572216-5
    ISSN 2156-7085
    ISSN 2156-7085
    DOI 10.1364/BOE.9.003974
    Database MEDical Literature Analysis and Retrieval System OnLINE

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