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Defect-Detection Model for Underground Parking Lots Using Image Object-Detection Method

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Computers, Materials & Continua 2021年第3期66卷 2493-2507页

作者： Hyun Kyu Shin Si Woon Lee Goo Pyo Hong Lee Sael Sang Hyo Lee Ha Young kim Architectural Engineering Hanyang UniversityERICAAnsan15588Korea Department of Artificial Intelligence Ajou UniversitySuwon16499Korea Division of Architecture and Civil Engineering Kangwon National UniversitySamcheok25913Korea Division of Smart Convergence Engineering Hanyang UniversityERICAAnsan15588Korea Graduate School of Information Yonsei UniversitySeoul03722Korea

The demand for defect diagnoses is gradually gaining ground owing to the growing necessity to implement safe inspection methods to ensure the durability and quality of ***,conventional manpower-based inspection methods not only incur considerable cost and time,but also cause frequent disputes regarding defects owing to poor ***,the demand for an effective and efficient defect-diagnosis model for concrete structures is imminent,as the reduction in maintenance costs is significant from a long-term ***,this paper proposes a deep learning-based image objectidentification method to detect the defects of paint peeling,leakage peeling,and leakage traces that mostly occur in underground parking lots made of concrete *** deep learning-based object-detection method can replace conventional visual inspection methods.A faster region-based convolutional neural network(R-CNN)model was used with a training dataset of 6,281 images that utilized a region proposal network to objectively localize the regions of interest and detect the surface *** defects were classified according to their type,and the learning of each exclusive model was ensured through test sets obtained from real underground parking *** a result,average precision scores of 37.76%,36.42%,and 61.29%were obtained for paint peeling,leakage peeling,and leakage trace defects,***,this study verified the performance of the faster RCNN-based defect-detection algorithm along with its applicability to underground parking lots.

关键词： Faster R-CNN deep learning defect detection concrete structures

Sodium and water perturbations in patients who had an acute stroke:clinical relevance and management strategies for the neurologist

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Stroke & Vascular Neurology 2022年第3期7卷 258-266页

作者： Kevin C J Yuen Valerie Sharf Elizabeth Smith Minhwan kim Alissya S M Yuen Paul R MacDonald Departments of Neuroendocrinology and Neurosurgery Barrow Neurological InstitutePhoenixArizonaUSA University of Arizona College of Medicine and Creighton School of Medicine PhoenixArizonaUSA Department of Neurology Barrow Neurological InstitutePhoenixArizonaUSA Midwestern University GlendaleIllinoisUSA Creighton University School of Medicine PhoenixArizonaUSA University of California Davis DavisCaliforniaUSA

Sodium and water perturbations,manifesting as hyponatraemia and hypernatraemia,are common in patients who had an acute stroke,and are associated with worse outcomes and increased *** non-stroke related causes of sodium and water perturbations in these patients include underlying comorbidities and concomitant ***,hospitalised patients who had an acute stroke may receive excessive intravenous hypotonic solutions,have poor fluid intake due to impaired neurocognition and consciousness,may develop sepsis or are administered drugs(eg,mannitol);factors that can further alter serum sodium *** and water perturbations can also be exacerbated by the development of endocrine consequences after an acute stroke,including secondary adrenal insufficiency,syndrome of inappropriate antidiuretic hormone secretion and diabetes ***,COVID-19 infection has been reported to increase the risk of development of sodium and water perturbations that may further worsen the outcomes of patients who had an acute *** there are currently no accepted consensus guidelines on the management of sodium and water perturbations in patients who had an acute stroke,we conducted a systematic review of the literature published in English and in peer-reviewed journals between January 2000 and December 2020,according to PRISMA guidelines,to assess on the current knowledge and clinical practices of this *** this review,we discuss the signs and symptoms of hyponatraemia and hypernatraemia,the pathogenesis of hyponatraemia and hypernatraemia,their clinical relevance,and we provide our recommendations for effective treatment strategies for the neurologist in the management of sodium and water perturbations in commonly encountered aetiologies of patients who had an acute stroke.

关键词： patients impaired consequences

Locally advanced pancreatic cancer: staging, operability, and the importance of multimodality therapy

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Hepatobiliary Surgery and Nutrition 2020年第4期9卷 497-500页

作者： Rebecca Y.kim Douglas B.Evans Kathleen K.Christians Department of Surgery and the LaBahn Pancreatic Cancer Program Medical College of WisconsinMilwaukeeWIUSA

The role for surgery in the management of locally advanced pancreatic cancer(LAPC)is nicely discussed in the manuscript by Gemenetzis et *** in the Annals of Surgery(1).As the authors acknowledge,therapeutic selection... 详细信息

关键词： Surgery cancer al.

Human Gait Recognition Based on Sequential Deep Learning and Best Features Selection

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Computers, Materials & Continua 2023年第6期75卷 5123-5140页

作者： Ch Avais Hanif Muhammad Ali Mughal Muhammad Attique Khan Usman Tariq Ye Jin kim Jae-Hyuk Cha Department of Electrical Engineering HITEC UniversityTaxilaPakistan Department of Computer Science HITEC UniversityTaxilaPakistan College of Computer Engineering and Science Prince Sattam Bin Abdulaziz UniversityAl-Kharaj11942Saudi Arabia Department of Computer Science Hanyang UniversitySeoul04763Korea

Gait recognition is an active research area that uses a walking theme to identify the subject *** Gait Recognition(HGR)is performed without any cooperation from the ***,in practice,it remains a challenging task under diverse walking sequences due to the covariant factors such as normal walking and walking with wearing a ***,over the years,have worked on successfully identifying subjects using different techniques,but there is still room for improvement in accuracy due to these covariant *** paper proposes an automated model-free framework for human gait recognition in this *** are a few critical steps in the proposed ***,optical flow-based motion region esti-mation and dynamic coordinates-based cropping are *** second step involves training a fine-tuned pre-trained MobileNetV2 model on both original and optical flow cropped frames;the training has been conducted using static *** third step proposed a fusion technique known as normal distribution serially *** the fourth step,a better optimization algorithm is applied to select the best features,which are then classified using a Bi-Layered neural *** publicly available datasets,CASIA A,CASIA B,and CASIA C,were used in the experimental process and obtained average accuracies of 99.6%,91.6%,and 95.02%,*** proposed framework has achieved improved accuracy compared to the other methods.

关键词： Human gait recognition optical flow deep learning features fusion feature selection

V-Shaped Monopole Antenna with Chichena Itzia Inspired Defected Ground Structure for UWB Applications

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Computers, Materials & Continua 2020年第10期65卷 19-32页

作者： Naeem Ahmad Jan Saad Hassan Kiani Fazal Muhammad Daniyal Ali Sehrai Amjad Iqbal Muhammad Tufail Sunghwan kim Department of Electrical Engineering Iqra National UniversityPeshawar25000Pakistan Department of Electrical Engineering City University of Science and Information TechnologyPeshawar25000Pakistan Department of Electrical Engineering Multimedia UniversityCyberjaya63100Malaysia Department of Mechatronics Engineering University of Engineering and TechnologyPeshawar25000Pakistan Department of Electrical Engineering University of UlsanUlsan44610Korea

Due to rapid growth in wireless communication technology,higher bandwidth requirement for advance telecommunication systems,capable of operating on two or higher bands with higher channel capacities and minimum distortion losses is *** this paper,a compact Ultra-Wideband(UWB)V-shaped monopole antenna is *** response is achieved by modifying the ground plane with Chichen Itzia inspired rectangular staircase *** proposed V-shaped is designed by incorporating a rectangle,and an inverted isosceles triangle using FR4 *** size of the antenna is 25 mm×26 mm×1.6 *** proposed V-shaped monopole antenna produces bandwidth response of 3 GHz Industrial,Scientific,and Medical(ISM),Worldwide Interoperability for Microwave Access(WiMAX),(IEEE 802.11/HIPERLAN band,5G sub 6 GHz)which with an additional square cut amplified the bandwidth response up to 8 GHz ranging from 3.1 GHz to 10.6 GHz attaining UWB defined by Federal Communications Commission(FCC)with a maximum gain of 3.83 *** antenna is designed in Ansys *** for key performance parameters of the antenna are *** measured results are in good agreement with the simulated *** to flat gain,uniform group delay,omni directional radiation pattern characteristics and well-matched impedance,the proposed antenna is suitable for WiMAX,ISM and heterogeneous wireless systems.

关键词： V-shape monopole gain staircase ultra-wideband omni-directional defected ground structure

Stimuli-responsive cyclometalated platinum complex bearing bent molecular geometry for highly efficient solution-processable OLEDs

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Chinese Chemical Letters 2021年第1期32卷 493-496页

作者： Zhenhua Wei Kai Zhang Chan Kyung kim Shuai Tan Shaojie Wang Lin Wang Jun Li Yafei Wang National Experimental Demonstration Center for Materials Science and Engineering(Changzhou University) Jiangsu Collaborative Innovation Center of Photovoltaic Science and EngineeringJiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and ApplicationsSchool of Materials Science&EngineeringChangzhou UniversityChangzhou 213164China Center for High Pressure Science(CHiPS) State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China Department of Chemistry and Chemical Engineering Inha UniversityIncheon 22212South Korea College of Chemistry Xiangtan UniversityXiangtan 411105China School of Chemical Engineering and Technology North University of ChinaTaiyuan 030051China Center for High Pressure Science and Technology Advanced Research Shanghai 201203China

Smart materials,such as stimuli-responsive luminescence,have attracted much attentions due to their potential application in semiconductor *** this context,platinum complexes of(dfppy-DC)Pt(acac) and(dfppy-O-DC)Pt(acac) were prepared and characterized,in which(2-(4',6'-difluorophenyl)pyridinato-N,C2')(2,4-pentanedionato-0,0)Pt(Ⅱ) was used as the planar emission core and 9-(4-(phenylsulfonyl)phenyl)-9 H-carbazole(DC) was regard as the bent *** platinum complexes showed bright emission in solution and solid state,concomitant with charming external-stimuli-responsive emission under mechanical grinding,organic solvent vapors and *** change emission color spanned from yellow to near-infrared *** the platinum complexes as the dopant,solution processable organic light-emitting diodes(OLEDs) were fabricated and a maximum external quantum efficiency of ~18% was achieved,which is the highest value among the reported solution-processable OLEDs based on externalstimuli-responsive *** research demonstrated that platinum complex can show promising stimuli responsive emission via ingenious molecular design,indicating a novel way for developing the smart materials in semiconductor filed.

关键词： Stimuli responsive emission Platinum complex Solution-processable OLEDs Synthesis and property

Patchwise Mapping Method for Solving Elliptic Boundary Value Problems Containing Multiple Singularities

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Journal of Applied Mathematics and Physics 2019年第7期7卷 1572-1598页

作者： Hyunju kim Department of Mathematics North Greenville University Tigerville SC USA

In the paper [1], the geometrical mapping techniques based on Non-Uniform Rational B-Spline (NURBS) were introduced to solve an elliptic boundary value problem containing a singularity. In the mapping techniques, the inverse function of the NURBS geometrical mapping generates singular functions as well as smooth functions by an unconventional choice of control points. It means that the push-forward of the NURBS geometrical mapping that generates singular functions, becomes a piecewise smooth function. However, the mapping method proposed is not able to catch singularities emerging at multiple locations in a domain. Thus, we design the geometrical mapping that generates singular functions for each singular zone in the physical domain. In the design of the geometrical mapping, we should consider the design of control points on the interface between/among patches so that global basis functions are in C0?space. Also, we modify the B-spline functions whose supports include the interface between/among them. We put the idea in practice by solving elliptic boundary value problems containing multiple singularities.

关键词： Mapping Method Non-Uniform Rational B-Spline (NURBS) Galerkin Approximation Isogeometric Analysis Multiple Singularities

Role of oregano and Citrus species-based essential oil preparation for the control of coccidiosis in broiler chickens

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Journal of Animal Science and Biotechnology 2021年第3期12卷 1089-1097页

作者： Francisco Xavier Gordillo Jaramillo Da-Hye kim Sang Hyeok Lee Sun-Kwan Kwon Rajesh Jha Kyung-Woo Lee Department of Animal Science and Technology Konkuk University120 Neungdong-roGwangjin-guSeoul 05029Republic of Korea Harim Bio Research Center Jeilfeed Co.LTD136 Techno2-roYuseong-guDeajeon-si 34025Republic of Korea Department of Human Nutrition Food and Animal SciencesCollege of Tropical Agricultural and Human ResourcesUniversity of Hawaii at ManoaHonoluluHI 96822USA

Background:Due to presence of drug-resistant Eimeria strains and raised public health safety concerns about drug residues in the meat,there is renewed interest in the search for natural alternatives to the coccidiosis control *** study was conducted to test the anticoccidial efficacy of oregano and Citrus spp.-based essential oils for ***:A total of 2807-day-old broiler chicks were fed a control diet or diets with salinomycin or essential oils for up to 35 d of *** d 14,half of the control groups and the treated groups were orally challenged with a coccidiosis vaccine at 25 times higher than the recommended vaccine *** diet-fed chickens that were gavaged with phosphate-buffered saline were considered non-challenged control ***:Eimeria challenge or dietary additives failed to affect growth performance during the 7 to 20 d growth period although essential oil-fed chickens exhibited the lowest body wight gain(P=0.332)and the highest feed conversion ratio(P=0.062).Oocysts in the litter were detected in the challenged control diet group and the challenged/essential oil-fed groups at 21 and 35 d,*** dismutase activity in the serum was elevated(P=0.059)in the salinomycin-fed chickens compared to the challenged ***-1-acid glycoprotein was decreased by 28.7%in the salinomycin-fed chickens but increased by 38.1%in the essential oil group compared with the challenged control *** control group exhibited a significantly higher cooking loss of the thigh meat,compared to the non-challenged control diet group,which was marginally mitigated by dietary supplementation with essential *** fed essential oil-added diet had the highest branched-chain fatty acids contents in the ***:In conclusion,this study shows that oregano and Citrus-based essential oil preparation did not affect growth performance in broiler chickens challenged with the coccidiosis vaccine nor did Eimeria-spec

关键词： Broiler chickens Coccidiosis Essential oils Growth performance Salinomycin

Ecology　of　the　marine　cladoceran　Penilia　avirostris　Dana　in　Tolo　Harbour，Hong　Kong

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Acta Oceanologica Sinica 1994年第1期13卷 117-127页

作者： Wong Chong kim Chan Lai-chun and Chen Qingchao )

Seasonal abundance of the marine cladoceran Penilia avirostris was studied in the Tolo Harbour,Hong Kong,from November 1987 to December *** occurred in plankton throughout the year,but no clear seasonal pattern could be identified. In general,densities were the highest in the Tolo Channel and decreased progressively towards the inner parts of the Tolo *** showed marked seasonal variations in body size and brood size. Body length of P. avirostris ranged from 0.3 to 1.0mm. Average body length was greatest on March 1988 and January 1989, and the smallest in May 1988, although no clear seasonal trends could be detected. Brood size of P. avirostris ranged from 1 to 13 over the study period with a mean of 5.6.A significant positive relationship was found between body length and brood size. Diel vertical migration and diel feeding pattern of P. avirostris was followed over a 24 h period from July 31 to August 1, 1991 at a station near the southern edge of the dam of the Plover Cove Reservoir. *** Performed typical nocturnal vertical migration. Although animals were seldom found below 10 m during either day or night,a greater fraction of the population was found in the upper 1 to 3 m at night than during the day.A diel cycle in gut pigment content was observed in ***. Gut pigment content was low during the day and increased sharply during the first 2 h after *** pigment content at 21:00 and 03:00 was about 2 times higher than average daytime *** a concentration was the highest near the surface and de creased towards the bottom, but water collected at 16 m still contained 1.79 ng/cm3 Chl.a. Because P. avirostris were usually found within the upper 10 m,we believe that the observed diel change in gut pigment content was like ly the result of a real diel feeding rhythm, and was probably not the result of individual animals moving in and out of the food-rich layer.

关键词： Ecology the Dana