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Arthroscopic treatment of iliopsoas tendinitis after total hip arthroplasty with acetabular cup malposition: Two case reports

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World Journal of Clinical Cases 2020年第21期8卷 5326-5333页

作者： heejae won Kwang-Hwan Kim Jae-Wook Jung Shin-Yoon Kim Seung-Hoon Baek Department of Orthopedic Surgery School of MedicineKyungpook National UniversityKyungpook National University Hospital130 Dongdeok-roJung-GuDaegu 41944South Korea

BACKGROUND Optimal treatment for iliopsoas tendinitis after total hip arthroplasty(THA)with cup malposition,iliopsoas release alone or with cup revision,is controversial,particularly in young,active ***,arthroscopic iliopsoas tendon(IPT)release in these patients has been rarely described,and midterm effects of this procedure on THA longevity and groin pain recurrence remain *** performed arthroscopic IPT release after THA and report midterm outcomes in two young patients with acetabular cup *** SUMMARY In the two patients,groin pain started early after *** examination revealed nonspecific findings,and laboratory tests showed no evidence of *** and computed tomography showed reduced acetabular component anteversion angle and anterior cup prominence of more than 16 *** therapeutic diagnosis,ultrasonography-guided lidocaine with steroid was injected into the IPT *** both patients,groin pain improved initially but worsened after a few ***,the patients underwent arthroscopic IPT release under spinal *** revealed synovitis with fibrous tissues around the IPT and various lesions related to the implants after *** tenotomy and debridement with biopsy were performed;histopathologic studies showed chronic inflammation with synovial *** patients were encouraged to start walking immediately after surgery,and they returned to complete daily function early after *** experienced no recurrence of groin pain or any implant-related problems 5 years *** Arthroscopic IPT release for cup malposition produced excellent midterm outcomes without recurrence of groin pain and implant-related problems.

关键词： Iliopsoas tendinitis Total hip arthroplasty Cup malposition Arthroscopy Tenotomy Case report

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Surgical strategy of the treatment of atypical femoral fractures

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World Journal of Orthopedics 2023年第5期14卷 302-311页

作者： Bum-Jin Shim heejae won Shin-Yoon Kim Seung-Hoon Baek Department of Orthopedic Surgery Kyungpook National University Chilgok HospitalDaegu 41404South Korea Department of Orthopedic Surgery Kyungpook National UniversityCollege of MedincineDaegu 41944South Korea Department of Orthopedic Surgery Kyungpook National University HospitalKyungpook National UniversityCollege of MedincineDaegu 41944South Korea

The atypical femoral fracture(AFF)has been attracting significant attention because of its increasing incidence;additionally,its treatment is challenging from biological and mechanical *** surgery is often required to manage complete AFFs,clear guidelines for the surgical treatment of AFFs are currently *** reviewed and described the surgical treatment of AFFs and the surveillance of the contralateral *** complete AFFs,cephalomedullary intramedullary nailing spanning the entire length of the femur can be *** surgical techniques to overcome the femoral bowing common in AFFs include a lateral entry point,external rotation of the nail,and the use of a nail with a small radius of curvature,or a contralateral *** the case of a narrow medullary canal,severe femoral bowing,or pre-existing implants,plate fixation may be considered as an *** incomplete AFFs,prophylactic fixation depends on several risk factors,such as a subtrochanteric location,presence of a radiolucent line,functional pain,and condition of the contralateral femur;the same surgical principles as those in complete AFFs can be ***,once AFF is diagnosed,clinicians should recognize the increased risk of contralateral AFFs,and close surveillance of the contralateral femur is recommended.

关键词： Atypical femoral fracture Surgical treatment Surveillance Contralateral femur Femoral bowing

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Does proximal femoral nail antirotation achieve better outcome than previous-generation proximal femoral nail?

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World Journal of Orthopedics 2020年第11期11卷 483-491页

作者： Seung-Hoon Baek Seunggil Baek heejae won Jee-Wook Yoon Chul-Hee Jung Shin-Yoon Kim Department of Orthopedic Surgery Kyungpook National University HospitalDaegu 41944South Korea Department of Orthopedic Surgery School of MedicineKyungpook National UniversityDaegu 41944South Korea Department of Orthopedic Surgery Goodssen HospitalDaegu 42010South Korea

BACKGROUND There are few studies in the literature comparing the clinical outcomes and radiographic results of proximal femoral nail(PFN)and proximal femoral nail antirotation(PFNA)for pertrochanteric femoral fracture(PFF)in elderly *** To evaluate both clinical and radiographic outcomes after fixation with PFN and PFNA in an elderly patient *** One hundred fifty-eight patients older than 65 years with PFF who underwent fixation with either PFN or PFNA were ***-three patients underwent fixation with PFN,whereas 85 were fixed with *** mean follow-up was 2.4 years(range,1-7 years).Clinical outcome was measured in terms of operation time,postoperative function at each follow-up visit,and mortality within one *** evaluation included reduction quality after surgery,Cleveland Index,tip-apex distance(TAD),union rate,time to union,and sliding distance of the screw or *** including nonunion,screw cutout,infection,osteonecrosis of the femoral head,and implant breakage were also *** Postoperative function was more satisfactory in patients who underwent PFNA than in those who underwent PFN(P=0.033).Radiologically,the sliding difference was greater in PFN than in PFNA patients(6.1 and 3.2 mm,respectively,P=0.036).The rate of screw cutout was higher in the PFN group;eight for PFN(11.0%)and two for PFNA patients(2.4%,P=0.027).There were no differences between the two groups in terms of operation time,mortality rate at one year after the operation,adequacy of reduction,Cleveland Index,TAD,union rate,time to union,nonunion,infection,osteonecrosis,or implant *** Elderly patients with PFF who underwent PFNA using a helical blade demonstrated better clinical and radiographic outcomes as measured by clinical score and sliding distance compared with patients who underwent PFN.

关键词： Pertrochanteric fracture Proximal femoral nail Proximal femoral nail antirotation Sliding distance Cutout Outcome

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An Investigation on Open-RAN Specifications:Use Cases,Security Threats,Requirements,Discussions

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Computer Modeling in Engineering & Sciences 2024年第10期141卷 13-41页

作者： heejae Park Tri-HaiNguyen Laihyuk Park Department of Computer Science and Engineering Seoul National University of Science and TechnologySeoul01811Republic of Korea Faculty of Information Technology School of TechnologyVan Lang UniversityHo Chi Minh City70000Vietnam

The emergence of various technologies such as terahertz communications,Reconfigurable Intelligent Surfaces(RIS),and AI-powered communication services will burden network operators with rising infrastructure ***,the Open Radio Access Network(O-RAN)has been introduced as a solution for growing financial and operational burdens in Beyond 5G(B5G)and 6G networks.O-RAN promotes openness and intelligence to overcome the limitations of traditional *** disaggregating conventional Base Band Units(BBUs)into O-RAN Distributed Units(O-DU)and O-RAN Centralized Units(O-CU),O-RAN offers greater flexibility for upgrades and network ***,this openness introduces new security challenges compared to traditional *** existing studies overlook these security requirements of the O-RAN *** gain deeper insights into the O-RAN system and security,this paper first provides an overview of the general O-RAN architecture and its diverse use cases relevant to B5G and 6G *** then delve into specifications of O-RAN security threats and requirements,aiming to mitigate security vulnerabilities *** providing a comprehensive understanding of O-RAN architecture,use cases,and security considerations,thisworkserves as a valuable resource for future research in O-RAN and its security.

关键词： O-RAN architecture use cases security issues security requirements security discussions

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Substructure imaging of heterogeneous nanomaterials with enhanced refractive index contrast by using a functionalized tip in photoinduced force microscopy

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Light(Science & Applications) 2018年第1期7卷 322-330页

作者： Junghoon Jahng heejae Yang Eun Seong Lee Center for Nanocharacterization Korea Research Institute of Standards and Science(KRISS)Daejeon 34113Republic of Korea Department of Materials Engineering Advanced Fibrous Materials LaboratoryUniversity of British ColumbiaVancouverBC V6T 1Z4Canada

The opto-mechanical force response from light-illuminated nanoscale materials has been exploited in many tip-based imaging applications to characterize various heterogeneous *** a force can have two origins:thermal expansion and induced *** thermal expansion reflects the absorption of the material,which enables one to chemically characterize a material at the absorption *** induced dipole interaction reflects the local refractive indices of the material underneath the tip,which is useful to characterize a material in the spectral region where no absorption resonance occurs,as in the infrared(IR)-inactive ***,the dipole force is relatively small,and the contrast is rarely discernible for most organic materials and biomaterials,which only show a small difference in refractive indices for their *** this letter,we demonstrate that refractive index contrast can be greatly enhanced with the assistance of a functionalized *** the enhanced contrast,we can visualize the substructure of heterogeneous biomaterials,such as a polyacrylonitrile-nanocrystalline cellulose(PAN-NCC)*** substructural visualization,we address the issue of the tensile strength of PAN-NCC fibers fabricated by several different mixing *** understanding from the present study will open up a new opportunity to provide enhanced sensitivity for substructure mapping of nanobiomaterials,as well as local field mapping of photonic devices,such as surface polaritons on semiconductors,metals and van der Waals materials.

关键词： refractive biomaterials functional

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Multi-Functional Composite Nanofibers for Advanced Textiles

Multi-Functional Composite Nanofibers for Advanced Textiles

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先进纺织材料及加工技术国际学术会议

作者： Frank K. Ko heejae Yang AMPEL Department of Materials Engineering University of British Columbia Vancouver

Multi-functional fibrous materials are a new family of fiber materials whose physical and chemical properties are sensitive to the change in the environment such as temperature, pressure, electric field, magnetic field, optical wavelength, adsorbed gas molecules and the pH value. This paper introduces a new approach to translate functions from nanoparticles to advanced fibrous structures by co-electrospinning of composite nanofibers. Examples of nanofibers that have tailorable mechanical, electrical, magnetic, optical, thermal, hygroscopic, and antimicrobial functions are shown. The paper concludes with an example of the development of a multifunctional nanofiber scaffold for cartilage tissue regeneration.

关键词： Functional materials Nanofibers Coelectrospinning Nanocomposite, SMART textiles.

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一种新型六角形编织机器的构建与应用

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纺织导报 2013年第4期 80-84页

作者：高彦涛 Frank Ko heejae Yang 胡红东华大学纺织学院英属哥伦比亚大学材料系&先进材料工程工艺实验室

文章首先简单地回顾了传统编织技术,然后阐述新型的六角形编织基本原理,并从编织运动实现原理以及编织控制方面详细讲述基于Labview计算机控制的六角形编织机器的构建方法。最后,通过举例方式展示这种六角形编织的初步应用。可以看出,... 详细信息

文章首先简单地回顾了传统编织技术,然后阐述新型的六角形编织基本原理,并从编织运动实现原理以及编织控制方面详细讲述基于Labview计算机控制的六角形编织机器的构建方法。最后,通过举例方式展示这种六角形编织的初步应用。可以看出,这种新颖的六角形编织机器的开发,对未来利用精细化微观编织产品的新兴领域来说具有重大意义。

关键词：六角形编织编织原理 labview

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Controlling the electro-optic response of a semiconducting perovskite coupled to a phonon-resonant cavity

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Light(Science & Applications) 2023年第9期12卷 1749-1756页

作者： Lucia Di Virgilio Jaco J.Geuchies heejae Kim Keno Krewer Hai Wang Maksim Grechko Mischa Bonn Max Planck Institute for Polymer Research Ackermannweg 1055128 MainzGermany Pohang University of Science and Technology Department of Physics37673 PohangKorea

Optical cavities,resonant with vibrational or electronic transitions of material within the cavity,enable control of light-matter *** studies have reported cavity-induced modifications of chemical reactivity,fluorescence,phase behavior,and charge ***,we explore the effect of resonant cavity-phonon coupling on the transient photoconductivity in a hybrid organic-inorganic *** this end,we measure the ultrafast photoconductivity response of perovskite in a tunable Fabry–Pérot terahertz cavity,designed to be transparent for optical *** terahertz-cavity field-phonon interaction causes apparent Rabi splitting between the perovskite phonon mode and the cavity *** explore whether the cavity-phonon interaction affects the material’s electron-phonon interaction by determining the charge-carrier mobility through *** the apparent hybridization of cavity and phonon modes,we show that the perovskite properties in both ground(phonon response)and excited(photoconductive response)states remain unaffected by the tunable light-matter *** the response of the integral perovskite-terahertz optical cavity system depends critically on the interaction strength of the cavity with the phonon:the transient terahertz response to optical excitation can be increased up to threefold by tuning the cavity-perovskite interaction *** results enable tunable switches and frequency-controlled induced transparency devices.

关键词： tunable cavity tuning

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崔锡鼎的《礼记类编》硏究——以家礼观为中心

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邯郸学院学报 2013年第2期23卷 35-39页

作者：李曦载邢丽菊韩国光州大学中文系韩国光州503703 复旦大学韩国研究中心上海200433

在17世纪的朝鲜,学者们对礼学表现出了很大的关注和研究。但是在朱子学一统天下的时代,从批判的角度来对礼学进行重新分析却不是易事。因为这意味着对传统价值观的挑战。朝鲜儒者崔锡鼎(1646—1711)对儒学经典《礼记》的研究以及对其的... 详细信息

在17世纪的朝鲜,学者们对礼学表现出了很大的关注和研究。但是在朱子学一统天下的时代,从批判的角度来对礼学进行重新分析却不是易事。因为这意味着对传统价值观的挑战。朝鲜儒者崔锡鼎(1646—1711)对儒学经典《礼记》的研究以及对其的注释书——《礼记类编》是基于对以前研究的怀疑以及力图恢复经典的原意而创作的经典著述类书籍。崔锡鼎的《礼记类编》不只是一部经典注释书,而是试图恢复《礼记》的原本而做的重新编排和构成。全书由18卷5册构成,主要分为《家礼》、《邦国礼》、《学礼》、《吉礼》、《凶礼》、《嘉礼》、《宾礼》等。他认为家礼不仅指的是冠婚丧祭的仪礼,它是修身齐家的一部分。为了修身,君子必须要具备相应的道德品性,这就需要在日常生活中践行礼节规范。

关键词：礼修身齐家家礼《礼记类编》

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