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Secondary craniofacial necrotizing fasciitis from a distant septic emboli: A case report

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World Journal of Clinical Cases 2022年第31期10卷 11630-11637页

作者： Da-Woon Lee Si-Hyun Kwak hwan-jun choi Department of Plastic and Reconstructive Surgery College of MedicineSoonchunhyang UniversityCheonan-si 31151South Korea Institute of Tissue Regeneration College of MedicineSoonchunhyang UniversityCheonan-si 31151South Korea

BACKGROUND Craniofacial necrotizing fasciitis(CNF)is an uncommon but fatal infection that can spread rapidly through the subfascial planes in the head and neck *** usually progress rapidly,and early management is necessary to optimize *** SUMMARY A 43-year-old man visited our hospital with left hemifacial swelling involving the buccal and submandibular *** patient had fever for approximately 10 d before visiting the hospital,but did not report any other systemic *** tomography scan demonstrated an abscess with gas *** surgical drainage of the facial abscess,the patient’s systemic condition worsened and progressed to septic *** examination revealed pulmonary and renal *** percutaneous catheter drainage was performed at the renal abscess site,which caused improvement of *** patient showed no evidence of systemic complications during the 4-mo post-operative follow-up *** As the patient did not improve with conventional CNF treatment and symptoms only resolved after controlling the infection,the final diagnosis was secondary CNF with septic *** surgical decompression is important for CNF ***,if symptoms worsen despite early diagnosis and management,such as pus drainage and surgical intervention,clinicians should consider the possibility of a secondary abscess from internal organs.

关键词： Craniofacial necrotizing fasciitis Septic emboli Klebsiella pneumoniae Secondary Case report

Recurrent intramuscular lipoma at extensor pollicis brevis:A case report

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World Journal of Clinical Cases 2023年第3期11卷 684-691页

作者： Je Yeon Byeon Yong Seon hwang Ji Hye Lee hwan jun choi Plastic and Reconstructive Surgery Soonchunhyang University HospitalCheonan-si 31151South Korea Department of Pathology Soonchunhyang University HospitalCheonan-si 31151South Korea

BACKGROUND This report describes and discusses recurrent intramuscular lipoma(IML)of the extensor pollicis brevis(EPB).An IML usually occurs in a large muscle of the limb or *** of IML is *** IMLs,especially those with unclear boundaries,necessitate complete *** cases of IML in the hand have been ***,recurrent IML appearing along the muscle and tendon of EPB on wrist and forearm has not been reported *** SUMMARY In this report,the authors describe clinical and histopathological features of recurrent IML at EPB.A 42-year-old Asian woman presented with a slowgrowing lump in her right forearm and wrist area six months *** patient had a history of surgery for a lipoma of the right forearm one year ago with a scar of 6cm on the right *** resonance imaging confirmed that the lipomatous mass,which had attenuation similar to subcutaneous fat,had invaded the muscle layer of *** and biopsy were performed under general *** histological examination,it was identified as an IML showing mature adipocytes and skeletal muscle ***,surgery was terminated without further *** recurrence occurred during a follow-up of five years after *** Recurrent IML in the wrist must be examined to differentiate it from *** to surrounding tissues should be minimized during excision.

关键词： Intramuscular Lipoma Recurrence Wrist Case report

Does the advantage of transcutaneous oximetry measurements in diabetic foot ulcer apply equally to free flap reconstruction?

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World Journal of Clinical Cases 2023年第31期11卷 7570-7582页

作者： Da Woon Lee Yong Seon hwang Je Yeon Byeon jun Hyuk Kim hwan jun choi Department of Plastic and Reconstructive Surgery College of MedicineSoonchunhyang UniversityCheonan-si 31151South Korea

BACKGROUND Transcutaneous oxygen pressure(TcpO2)is a precise method for determining oxygen perfusion in wounded *** device uses either electrochemical or optical *** To evaluate the usefulness of TcpO2 measurements on free flaps(FFs)in diabetic foot ulcers(DFUs).METHODS TcpO2 was measured in 17 patients with DFUs who underwent anterolateral thigh(ALT)-FF surgery and compared with 30 patients with DFU without FF *** Significant differences were observed in the ankle-brachial index;duration of diabetes;and haemoglobin,creatinine,and C-reactive protein levels between the two ***2 values were similar between two groups except on postoperative days 30 and 60 when the values in the ALT-FF group remained50 *** Even if the flap is clinically stable,sympathectomy due to adventitia stripping during anastomosis and arteriovenous shunt progression due to diabetic polyneuropathy could lead to low TcpO2 values in the ALT-FF owing to its thick fat tissues,which is supported by the slow recovery of the sympathetic tone following ***,TcpO2 measurements in patients with DFU who underwent FF reconstruction may be less accurate than in those who did not.

关键词： Arteriovenous shunt Surgical Diabetic neuropathies Free tissue flaps Sympathectomy Blood gas monitoring Transcutaneous Diabetic angiopathies

Removal of unexpected schwannoma with superficial parotidectomy using modified-Blair incision and superficial musculoaponeurotic system folding: A case report

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World Journal of Clinical Cases 2023年第18期11卷 4438-4445页

作者： Ha-Jong Nam hwan jun choi Je-Yeon Byeon Syeo-Young Wee Department of Plastic and Reconstructive Surgery Soonchunhyang University Gumi HospitalGumi-si 39371Gyeonsangbuk-doSouth Korea Department of Plastic and Reconstructive Surgery Soonchunhyang University Cheonan HospitalCheonan-si 31151Chungcheongnam-doSouth Korea

BACKGROUND When a firm facial mass in the cheek region is associated with a high index of clinical suspicion of its being of parotid gland origin,preventive parotidectomy is invariably *** report a rare case of a schwannoma that was suspected to be of parotid gland origin in a patient,who underwent successful surgical management using a modified-Blair incision and superficial musculoaponeurotic system(SMAS)layer folding *** SUMMARY A 27-year-old woman presented to the hospital for evaluation of a firm,fixed,non-tender mass(2.5 cm×3.5 cm),located anterior to the right ear,of 1 year’s ***-enhanced facial computed tomography revealed a wellencapsulated,low-density mass adherent to the superficial lobe of the right parotid gland,with a high index of clinical suspicion of an accessory parotid gland *** patient was scheduled to undergo resection of the mass and superficial *** underwent surgery using a modified-Blair incision,and the SMAS layer was folded posteriorly to reconstruct the *** examination confirmed the diagnosis of a schwannoma.,and we observed no postoperative complications such as hematoma,infection,or abnormal facial *** incision scar was unnoticeable 2 mo postoperatively,and the facial contour was maintained without any differences between the affected and unaffected *** We used a modified-Blair incision and SMAS layer folding method to achieve aesthetically good results following resection of a rare schwannoma with superficial parotidectomy in the cheek region.

关键词： Schwannoma Parotid gland Superficial musculoaponeurotic system Case report

Effectiveness of out-fracture of the inferior turbinate with reduction nasal bone fracture

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世界临床病例杂志 2023年第27期11卷 6374-6382页

作者： Se-Young Kim Ha-Jong Nam Je-Yeon Byeon hwan jun choi Department of Plastic and Reconstructive Surgery Soonchunhyang University Gumi HospitalGumi-si 39371South Korea Department of Plastic and Reconstructive Surgery Soonchunhyang University Cheonan HospitalCheonan-si 31151South Korea

BACKGROUND The nasal bone,being the most protruding bone in the center of the facial bones,is particularly susceptible to *** bone fractures can often result in secondary deformation and dysfunction of the nose,including septal *** on functional or intra-nasal complications have been rarely reported after nasal bone fracture *** To evaluate the severity of nasal obstruction and its improvement following nasal bone fracture reduction using inferior *** We conducted a retrospective review of data from 50 patients with symptomatic nasal obstruction between January to December *** patients underwent preoperative Computed tomography evaluation,and symptom changes and nasal cavity volume were analyzed using a visual analog scale and acoustic rhinometry before and after *** reduction and out-fracture of both inferior turbinates performed by the same *** outcomes were assessed by comparing changes in the nasal airway volume measured using acoustic rhinometry before and after *** minimal cross-sectional area(MCA)was also analyzed based on the Stranc *** Before reduction,the mean MCA for all cases was 0.59±0.06 cm^(2),which represented an 11%decrease compared to the average size of a Korean adult(0.65±0.03 cm^(2)).The MCA for frontal impact was 0.60±0.02 cm^(2) and for lateral impact,it was 0.58±0.03 cm^(2).After reduction via inferior turbinoplasty,the MCA improved to 0.64±0.04 cm^(2).CONCLUSION This study suggests that turbinoplasty is helpful in addressing nasal ***-fracture of the inferior turbinate is an effective and durable technique that can be easily performed to enlarge the nasal airway with minimal morbidity.

关键词： Acoustic rhinometry Nasal bone Fracture Turbinate

Development of vehicle-recognition method on water surfaces using LiDAR data:SPD^(2)(spherically stratified point projection with diameter and distance)

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Defence Technology（防务技术） 2024年第6期36卷 95-104页

作者： Eon-ho Lee Hyeon jun Jeon Jinwoo choi Hyun-Taek choi Sejin Lee The Department of Mechanical Engineering Kongju National University1223-24 Cheonan-daeroCheonan 31080Republic of Korea Ocean System Engineering Research Division Korea Research Institute of Ships and Ocean Engineering(KRISO)Daejeon 34103Republic of Korea The Division of Mechanical&Automotive Engineering Kongju National University1223-24 Cheonan-daeroCheonan 31080Republic of Korea

Swarm robot systems are an important application of autonomous unmanned surface vehicles on water *** monitoring natural environments and conducting security activities within a certain range using a surface vehicle,the swarm robot system is more efficient than the operation of a single object as the former can reduce cost and save *** is necessary to detect adjacent surface obstacles robustly to operate a cluster of unmanned surface *** this purpose,a LiDAR(light detection and ranging)sensor is used as it can simultaneously obtain 3D information for all directions,relatively robustly and accurately,irrespective of the surrounding environmental *** the GPS(global-positioning-system)error range exists,obtaining measurements of the surface-vessel position can still ensure stability during platoon *** this study,a three-layer convolutional neural network is applied to classify types of surface *** aim of this approach is to redefine the sparse 3D point cloud data as 2D image data with a connotative meaning and subsequently utilize this transformed data for object classification ***,we have proposed a descriptor that converts the 3D point cloud data into 2D image *** use this descriptor effectively,it is necessary to perform a clustering operation that separates the point clouds for each *** developed voxel-based clustering for the point cloud ***,using the descriptor,3D point cloud data can be converted into a 2D feature image,and the converted 2D image is provided as an input value to the *** intend to verify the validity of the proposed 3D point cloud feature descriptor by using experimental data in the ***,we explore the feasibility of real-time object classification within this framework.

关键词： Object classification Clustering 3D point cloud data LiDAR(light detection and ranging) Surface vehicle

Omnidirectional color wavelength tuning of stretchable chiral liquid crystal elastomers

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Light(Science & Applications) 2024年第6期13卷 1062-1074页

作者： Seungmin Nam Wontae jung jun Hyuk Shin Su Seok choi Department of Electrical Engineering Pohang University of Science and Technology(POSTECH)PohangKorea

Wavelength-tunable structural colors using stimuli-responsive materials,such as chiral liquid crystals(CLCs),have attracted increasing attention owing to their high functionality in various tunable photonic ***,on-demand omnidirectional wavelength control is highly desirable from the perspective of wavelength-tuning ***,despite numerous previous research efforts on tunable CLC structural colors,only mono-directional wavelength tuning toward shorter wavelengths has been employed in most studies to *** this study,we report the ideally desired omnidirectional wavelength control toward longer and shorter wavelengths with significantly improved tunability over a broadband wavelength *** using areal expanding and contractive strain control of dielectric elastomer actuators(DEAs)with chiral liquid crystal elastomers(CLCEs),simultaneous and omnidirectional structural color-tuning control was *** breakthrough in omnidirectional wavelength control enhances the achievable tuning freedom and versatility,making it applicable to a broad range of high-functional photonic applications.

关键词： tuning tunable directional

Data driven computational design of stable oxygen evolution catalysts by DFT and machine learning:Promising electrocatalysts

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Journal of Energy Chemistry 2024年第4期91卷 645-655页

作者： hwanyeol Park Yunseok Kim Seulwon choi Ho jun Kim Department of Display Materials Engineering Soonchunhyang UniversityAsanChung-nam 31538Republic of Korea Department of Electronic Materials Devicesand Equipment EngineeringSoonchunhyang Uni-versityAsanChungnam 31538Republic of Korea Department of Mechanical Engineering Hanyang University ERICA Campus55 Hanyangdaehak-roSangnok-guAnsanGyeonggi-do 15588Republic of Korea

The revolutionary development of machine learning(ML),data science,and analytics,coupled with its application in material science,stands as a significant milestone of the scientific community over the last *** active,stable,and cost-efficient catalysts is crucial for oxygen evolution reaction owing to the significance in a range of electrochemical energy co nversion *** this work,we have demonstrated an efficient approach of high-throughput screening to find stable transition metal oxides under acid condition for high-performance oxygen evolution reaction(OER)catalysts through density functional theory(DFT)calculation and a machine learning algorithm.A methodology utilizing both the Materials Project database and DFT calculations was introduced to assess the acid stability under specific reaction *** upon this,OER catalytic activity of acid-stable materials was examined,highlighting potential OER catalysts that meet the required *** identified IrO_(2),Fe(SbO_(3))_(2),Co(SbO_(3))_(2),Ni(SbO_(3))_(2),FeSbO_(4),Fe(SbO_(3))4,MoWO_(6),TiSnO_(4),CoSbO_(4),and Ti(WO_(4))_(2)as promising catalysts,several of which have already been experimentally discovered for their robust OER performance,while others are novel for experimental exploration,thereby broadening the chemical scope for efficient OER *** of the bond length of TM-O and the first ionization energy were used to unveil the OER activity *** the calculated results,guidance has been derived to effectively execute advanced high-throughput screenings for the discovery of catalysts with favorable ***,the intrinsic correlation between catalytic performance and various atomic and structural factors was elucidated using the ML *** these approaches,we not only streamline the choice of the promising electrocatalysts but also offer insights for the design of varied catalyst models and the discovery of superior c

关键词： Transition metal oxides Oxygen evolution reaction High-throughput screening First-principles calculation Machine learning

电沉积Mo和Mo-Co合金纳米线用于互联电阻的电阻率改性

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Engineering 2024年第1期32卷 127-137页

作者： jun hwan Moon Taesoon Kim Youngmin Lee Seunghyun Kim Yanghee Kim Jae-Pyoung Ahn jungwoo choi Hyuck Mo Lee Young Keun Kim Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea Department of Materials Science and Engineering Korea Advanced Institute of Science and EngineeringDaejeon 34141Republic of Korea Advanced Analysis Center Korea Institute of Science and TechnologySeoul 02792Republic of Korea Research Resources Division Korea Institute of Science and TechnologySeoul 02792Republic of Korea

Achieving historically anticipated improvement in the performance of integrated circuits is challenging,due to the increasing cost and complexity of the required technologies with each new *** overcome this limitation,the exploration and development of novel interconnect materials and processes are highly desirable in the microelectronics ***(Mo)is attracting attention as an advanced interconnect material due to its small resistivity size effect and high cohesive energy;however,effective processing methods for such materials have not been widely ***,we investigate the electrochemical behavior of ions in the confined nanopores that affect the electrical properties and microstructures of nanoscale Mo and Mo-Co alloys prepared via template-assisted *** in an electrolyte allow the deposition of extremely pure metal materials,due to their interac-tion with metal ions and *** this study,boric acid and tetrabutylammonium bisulfate(TBA)were added to an acetate bath to inhibit the hydrogen evolution *** accelerated the reduction of Mo at the surface by inducing surface conduction on the *** Mo nanowires with a 130 nm diameter synthesized through high-aspect-ratio nanopore engineering exhibited a resistivity of(63.0±17.9)μΩ*** also evaluated the resistivities of Mo-Co alloy nanowires at various compo-sitions toward replacing irreducible conventional barrier/liner *** intermetallic compound formed at a Mo composition of 28.6 at%,the resistivity of the Mo-Co nanowire was(58.0±10.6)μΩcm,indicat-ing its superior electrical and adhesive properties in comparison with those of conventional barriers such as TaN and ***,density functional theory and non-equilibrium Green's function calcula-tions confirmed that the vertical resistance of the via structure constructed from Mo-based materials was 21%lower than that of a conventional Cu/Ta/TaN structure.

关键词： Molybdenum Molybdenum-cobalt Interconnect Microstructure Electrodeposition Density functional theory