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Dedifferentiated chondrosarcoma of the middle finger arising from a solitary enchondroma:A case report

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World Journal of Clinical Cases 2022年第10期10卷 3297-3305页

作者： Hirotaka Yonezawa Norio Yamamoto Katsuhiro Hayashi Akihiko Takeuchi Shinji Miwa Kentaro Igarashi sei morinaga Yohei Asano Shiro Saito Yasunori Tome Hiroko Ikeda Takayuki Nojima Hiroyuki Tsuchiya Department of Orthopaedic Surgery Graduate School of Medical SciencesKanazawa UniversityKanazawa 920-8641IshikawaJapan Department of Orthopedic Surgery Graduate School of MedicineUniversity of the RyukyusNishihara 903-0215OkinawaJapan Department of Diagnostic Pathology Kanazawa University HospitalKanazawa 920-8641IshikawaJapan

BACKGROUND Dedifferentiated chondrosarcoma(DDCS)accounts for 10%of all chondrosarcomas and has the poorest outcome,with a 5-year survival rate of 7%-25%.DDCS commonly occurs in the femur and pelvis,whereas DDCS of the finger is extremely ***,the histological findings of preexisting solitary enchondroma samples are important and valuable for diagnosing malignant *** SUMMARY We report our experience with DDCS in the proximal phalanx of the left middle finger of an 87-year-old *** had undergone surgery for enchondroma,with curettage and artificial bone grafting,11 years ago,in the same *** years after the primary surgery,the left middle finger gradually started to enlarge,and the growth speed increased in the past *** radiographs showed an expansive osteolytic lesion with calcifications and residual grafting *** to the suspicion of malignancy,we performed ray *** findings revealed an abrupt transition between the low-grade chondrosarcoma and dedifferentiated sarcoma *** dedifferentiated components showed the features of a high-grade undifferentiated pleomorphic *** patient was diagnosed with DDCS arising from a preexisting *** had no local recurrence or distant metastasis and died of pneumonia 6 years and 10 months after the second *** The histological findings of a precursor lesion showed a typical enchondroma,suggesting that DDCS can arise from enchondroma.

关键词： Dedifferentiated chondrosarcoma Enchondroma Finger Phalanx Ray amputation Case report

Weapon effectiveness and the shapes of damage functions

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Defence Technology（防务技术） 2021年第2期17卷 617-632页

作者： sei-Hoon Moon th R&D Institute Agency for Defense DevelopmentYusungDaejeon305-152Republic of Korea Department of Mechanical and Aerospace Engineering Naval Postgraduate School MontereyCA93940USA

This paper provides a review of methods of assessing a fragmentation weapon’s effectiveness against a point target or an area target with keeping the focus on the necessity of using the Carleton damage function with the correct shape ***,cookie-cutter damage functions are redefined to preserve the shape factor of and to have the same lethal area as the corresponding Carleton damage ***,closed-form solutions of the effectiveness methods are obtained by using those cookie-cutter damage functions and the Carleton damage ***,the closed-form solutions are applied to calculate the probability of damaging a point target and the expected fractional damage to an area target for several attack scenarios by using cookie-cutter damage functions and the Carleton damage functions with different shape *** comparison of the calculation results shows that using cookie-cutter damage functions or the Carleton damage function with a wrong shape factor results in quite significant differences from using the original Carleton damage function with a correct shape factor when weapon’s delivery error deviations are less than or comparable to the lengths of the lethal area and the aim point is far from a *** effectiveness methods improved in this paper will be useful for mission planning utilizing the precision-guided munitions in circumstances where the collateral damage should be reduced.

关键词： Weapon effectiveness Point target Area target Cookie-cutter damage function Carleton damage function

Two coplanar cracks in a functionally graded piezoelectric material strip under mechanical and transient thermal loadings

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Science China(Physics,Mechanics & Astronomy) 2012年第11期55卷 2088-2099页

作者： UEDA sei Department of Mechanical Engineering Osaka Institute of Technology5-16-1 OmiyaAsahi-kuOsaka535-8585Japan

In this paper,the fracture problem of a functionally graded piezoelectric material strip(FGPM strip) containing two coplanar cracks perpendicular to its boundaries is *** problem is solved for an FGPM strip that is suddenly heated from the bottom surface under static mechanical *** top surface is maintained at the initial *** crack faces are supposed to be completely *** properties are assumed to be exponentially dependent on the distance from the bottom *** using the Laplace and Fourier transforms,the thermoelectromechanical fracture problem is reduced to a set of singular integral equations,which are solved *** stress intensity factors for the cases of the two embedded cracks,two edge cracks,and an embedded crack and an edge crack are computed and presented as a function of the normalized time,the nonhomogeneous and geometric parameters.

关键词： functionally graded piezoelectric material fracture mechanics elasticity coplanar cracks stress intensity factor integral transform transient response

Forest insect assemblages attracted to light trap on two high mountains(Mt. Jirisan and Mt. Hallasan) in South Korea

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Journal of Forestry Research 2016年第5期27卷 1203-1210页

作者： Pyae Pyae Thein sei-Woong Choi Department of Environmental Education Mokpo National University

Assemblages of forest insects across two high mountains （Mt. Hallasan： JJ and Mt. Jirisan： JR） in South Korea were compared by collecting insects using an ultraviolet light trap at 20 sites （200-1700 m elevation ranges） from May to October 2013. A total of 2960 individuals, representing 481 species of 10 orders, were collected on JJ, compared with 7080 individuals representing 769 species of 14 orders on JR. The estimated number of species on JJ was 667 compared with 952 on JR. The differentiation among habitats （[3-diversity） was higher on JJ （4.95） than JR （4.33） because of the island characteris- tics of JJ. Six insect orders （Lepidoptera, Coleoptera, Diptera, Hymenoptera, Hemiptera and Trichoptera） were dominant on both mountains, suggesting that the light trap captures represented well the insect fauna and is an effective method for investigating forest insect diversity. We concluded that forest insect assemblages on mountains are mainly affected by the elevation and the dominant forest in each elevation. In addition, the insect fauna on each mountain was differentiated by the habitat, which could be correlated with geological history.

关键词： Island Mainland Species richness Abundance - Nocturnal insects

Abiotic degradation of four phthalic acid esters in aqueous phase under natural sunlight irradiation

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Journal of Environmental Sciences 2009年第3期21卷 285-290页

作者： Ruttapol Lertsirisopon Satoshi Soda Kazunari sei Michihiko Ike Division of Sustainable Energy and Environmental Engineering Graduate School of Engineering Osaka University 2-1 Yamada-okaSuita 565-0871 Osaka Japan

Abiotic degradability of four phthalic acid esters （PAEs） in the aquatic phase was evaluated over a wide pH range 5-9. The PAE solutions in glass test tubes were placed either in the dark and under the natural sunlight irradiation for evaluating the degradation rate via hydrolysis or photolysis plus hydrolysis, respectively, at ambient temperature for 140 d from autumn to winter in Osaka, Japan. The efficiency of abiotic degradation of the PAEs with relatively short alkyl chains, such as butylbenzyl phthalate （BBP） and di-nbutyl phthalate （DBP）, at neutral pH was significantly lower than that in the acidic or alkaline condition. Photolysis was considered to contribute mainly to the total abiotic degradation at all pH. Neither hydrolysis nor photolysis of di-ethylhexyl phthalate （DEHP） proceeded significantly at any pH, especially hydrolysis at neutral pH was negligible. On the other hand, the degradation rate of di- isononyl phthalate （DINP） catalyzed mainly by photolysis was much higher than those of the other PAEs, and was almost completely removed during the experimental period at pH 5 and 9. As a whole, according to the half-life （t1/2） obtained in the experiments, the abiotic degradability of the PAEs was in the sequence： DINP （32-140 d）〉 DBP （50-360 d）, BBP （58-480 d）〉 DEHP （390-1600 d） under sunlight irradiation （via photolysis plus hydrolysis）. Although the abiotic degradation rates for BBP, DBP, and DEHP are much lower than the biodegradation rates reported, the photolysis rate for DINP is comparable to its biodegradation rate in the acidic or alkaline condition.

关键词： phthalic acid esters abiotic degradation photolysis hydrolysis first-order kinetics

Poisson double extensions

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Science China Mathematics 2020年第4期63卷 701-720页

作者： Qi Lou sei-Qwon Oh Shengqiang Wang School of Mathematical Sciences Fudan UniversityShanghai 200433China Department of Mathematics Chungnam National UniversityDaejeon 34134Republic of Korea Department of Mathematics East China University of Science and TechnologyShanghai 200237China

A double Ore extension was introduced by Zhang and Zhang(2008)to study a class of ArtinShelter regular *** we give a definition of Poisson double extension which may be considered as an analogue of the double Ore extension,and show that algebras in a class of double Ore extensions are deformation quantizations of Poisson double *** also investigate the modular derivations of Poisson double extensions and the relationship between Poisson double extensions and iterated Poisson polynomial *** are illustrated by examples.

关键词： Poisson double extension semiclassical limit deformation quantization

Transient thermal response of functionally graded piezoelectric laminates with an infinite row of parallel cracks normal to the bimaterial interface

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Theoretical & Applied Mechanics Letters 2019年第5期9卷 289-292,I0003页

作者： Yoshiyuki Mabuchi sei Ueda Department of Mechanical Engineering Osaka Institute of Technology

In this paper,the problem of a functionally graded piezoelectric material strip(FGPM strip)containing an infinite row of parallel cracks perpendicular to the interface between the FGPM strip and a homogeneous layer is analyzed under transient thermal loading *** crack faces are supposed to be completely *** properties are assumed to be exponentially dependent on the distance from the *** the Fourier transforms,the electro-thermoelastic problem is reduced to a singular integral equation,which is solved *** stress intensity factors are computed and presented as a function of the normalized time,the nonhomogeneous and geometric parameters.

关键词： Functionally graded piezoelectric material Fracture mechanics Stress intensity factor Elasticity

Controlled afterglow luminescent particles for photochemical tissue bonding

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Light(Science & Applications) 2022年第11期11卷 2755-2765页

作者： Seong-Jong Kim Minji Choi Guosong Hong sei Kwang Hahn Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)77 Cheongam-roNam-guPohangGyeongbuk 37673Korea Department of Materials Science and Engineering Stanford UniversityStanfordCA 94305USA

Upconversion materials(UCMs)have been developed to convert tissue-penetrating near-infrared(NIR)light into visible ***,the low energy conversion effciency of UCMs has limited their further biophotonic ***,we developed controlled afterglow luminescent particles(ALPs)of ZnS:Ag,Co with strong and persistent green luminescence for photochemical tissue bonding(PTB).The co-doping of Ag^(+) and Co^(2+) ions into ZnS:Ag,Co particles with the proper vacancy formation of host ions resulted in high luminescence intensity and long-term *** addition,the ALPs of ZnS:Ag,Co could be recharged rapidly under short ultraviolet(UV)irradiation,which effectively activated rose bengal(RB)in hyaluronate-RB(HA-RB)conjugates for the crosslinking of dissected collagen layers without additional light *** remarkable PTB of ZnS:Ag,Co particles with HA-RB conjugates was confirmed by in vitro collagen fibrillogenesis assay,in vivo animal wound closure rate analysis,and in vivo tensile strength evaluation of incised skin *** together,we could confirm the feasibility of controlled ALPs for various biophotonic applications.

关键词： bonding fir closure

Homomorphisms between JC~*-algebras and Lie C(?)-algebras

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Acta Mathematica Sinica,English Series 2005年第6期21卷 1391-1398页

作者： Chun Gil PARK Jin Chuan HOU sei Qwon OH Department of Mathematics Chungnam National University Daejeon 305 764 South Korea Department of Mathematics Shanxi Teachers University Linfen 041004 P. R. China Department of Mathematics Shanxi University Taiyuan 030006 P. R. China

It is shown that every almost ＊-homomorphism h ： A→B of a unital JC＊-algebra A to a unital JC＊-algebra B is a ＊-homomorphism when h（rx） = rh（x）（r 〉 1） for all x∈A, and that every almost linear mapping h ： A→B is a ＊-homomorphism when h（2^nu o y） - h（2^nu） o h（y）, h（3^nu o y） - h（3^nu） o h（y） or h（q^nu o y） = h（q^nu） o h（y） for all unitaries u ∈A, all y ∈A, and n = 0, 1,.... Here the numbers 2, 3, q depend on the functional equations given in the almost linear mappings. We prove that every almost ＊-homomorphism h ： A→B of a unital Lie C＊-algebra A to a unital Lie C＊-algebra B is a ＊-homomorphism when h（rx） = rh（x）（r 〉 1） for all x ∈A.

关键词： *-homomorphism JC*-algbera Lie C*-algebra Stability Linear functional equation