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Real-Time Anomaly Detection in Packaged Food X-Ray Images Using Supervised Learning

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Computers, Materials & Continua 2021年第5期67卷 2547-2568页

作者： Kangjik kim Hyunbin kim Junchul Chun mingoo Kang min Hong Byungseok min Department of Computer Science Kyonggi UniversitySuwon-si16227Korea Department of IT Contents Hanshin UniversityOsan-si18101Korea Department of Computer Software Engineering Soonchunhyang UniversityAsan-si31538Korea R&D Center XAVIS Co.LtdSeongnam-si13202Korea

Physical contamination of food occurs when it comes into contact with foreign *** objects can be introduced to food at any time during food delivery and packaging and can cause serious concerns such as broken teeth or ***,a preventive method that can detect and remove foreign objects in advance is *** studies have attempted to detect defective products using deep learning *** it is difficult to obtain foreign object-containing food data from industry,most studies on industrial anomaly detection have used unsupervised learning *** paper proposes a new method for real-time anomaly detection in packaged food products using a supervised learning *** this study,a realistic X-ray image training dataset was constructed by augmenting foreign objects with normal product images in a cut-paste *** on the augmented training dataset,we trained YOLOv4,a real-time object detection network,and detected foreign objects in the test *** evaluated this method on images of pasta,snacks,pistachios,and red beans under the same *** results show that the normal and defective products were classified with an accuracy of at least 94%for all packaged *** detecting foreign objects that are typically difficult to detect using the unsupervised learning and traditional methods,the proposed method achieved high-performance realtime anomaly *** addition,to eliminate the loss in high-resolution X-ray images,the false positive rate and accuracy could be lowered to 5%with patch-based training and a new post-processing algorithm.

关键词： Deep-learning anomaly detection packaged food X-ray detection foreign substances detection abnormal data augmentation

Predictive proteomic biomarkers for inflammatory bowel disease-associated cancer:Where are we now in the era of the next generation proteomics?

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World Journal of Gastroenterology 2014年第37期20卷 13466-13476页

作者： Jong-min Park Na Young Han Young-min Han Mi Kyung Chung Hoo Keun Lee kwang Hyun Ko Eun-Hee kim Ki Baik Hahm CHA Cancer Prevention Research Center CHA University Gachon University College of Pharmacy Digestive Disease Center CHA University Bundang Medical Center

Recent advances in genomic medicine have opened up the possibility of tailored medicine that may eventually replace traditional “one-size-fits all” approaches to the treatment of inflammatory bowel disease (IBD). In addition to exploring the interactions between hosts and microbes, referred to as the microbiome, a variety of strategies that can be tailored to an individual in the coming era of personalized medicine in the treatment of IBD are being investigated. These include prompt genomic screening of patients at risk of developing IBD, the utility of molecular discrimination of IBD subtypes among patients diagnosed with IBD, and the discovery of proteome biomarkers to diagnose or predict cancer risks. Host genetic factors influence the etiology of IBD, as do microbial ecosystems in the human bowel, which are not uniform, but instead represent many different microhabitats that can be influenced by diet and might affect processes essential to bowel metabolism. Further advances in basic research regarding intestinal inflammation may reveal new insights into the role of inflammatory mediators, referred to as the inflammasome, and the macromolecular complex of metabolites formed by intestinal bacteria. Collectively, knowledge of the inflammasome and metagenomics will lead to the development of biomarkers for IBD that target specific pathogenic mechanisms involved in the spontaneous progress of IBD. In this review article, our recent results regarding the discovery of potential proteomic biomarkers using a label-free quantification technique are introduced and on-going projects contributing to either the discrimination of IBD subtypes or to the prediction of cancer risks are accompanied by updated information from IBD biomarker research.

关键词： Inflammatory bowel disease Biomarker Proteomics Tailored medicine Colitic cancer

Construction of tantalum/poly(ether imide)coatings on magnesium implants with both corrosion protection and osseointegration properties

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Bioactive Materials 2021年第4期6卷 1189-1200页

作者： kwang-Hee Cheon Cheonil Park min-Ho Kang In-Gu Kang min-Kyu Lee Hyun Lee Hyoun-Ee kim Hyun-Do Jung Tae-Sik Jang Department of Materials Science and Engineering Seoul National UniversitySeoulRepublic of Korea Department of Biomedical-Chemical Engineering Catholic University of KoreaBucheonGyeonggi-doRepublic of Korea Institute of Health Science Research Korea UniversitySeoul02841Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangjuRepublic of Korea

Poly(ether imide)(PEI)has shown satisfactory corrosion protection capability with good adhesion strength as a coating for magnesium(Mg),a potential candidate of biodegradable orthopedic implant ***,its innate hydrophobic property causes insufficient osteoblast affinity and a lack of ***,we modify the physical and chemical properties of a PEI-coated Mg implant.A plasma immersion ion implantation technique is combined with direct current(DC)magnetron sputtering to introduce biologically compatible tantalum(Ta)onto the surface of the PEI *** PEI-coating layer is not damaged during this process owing to the extremely short processing time(30 s),retaining its high corrosion protection property and adhesion *** Ta-implanted layer(roughly 10-nm-thick)on the topmost PEI surface generates long-term surface hydrophilicity and favorable surface conditions for pre-osteoblasts to adhere,proliferate,and ***,in a rabbit femur study,the Ta/PEI-coated Mg implant demonstrates significantly enhanced bone tissue affinity and osseointegration *** results indicate that Ta/PEI-coated Mg is promising for achieving early mechanical fixation and long-term success in biodegradable orthopedic implant applications.

关键词： Magnesium Tantalum Poly(ether imide) Bio-functionalized coating Biodegradable orthopedic implants

Deep Learning Model Ensemble for the Accuracy of Classification Degenerative Arthritis

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计算机、材料和连续体（英文） 2023年第4期75卷 1981-1994页

作者： Sang-min Lee Namgi kim Department of Computer Science Kyonggi UniversitySuwonKorea

Artificial intelligence technologies are being studied to provide scientific evidence in the medical field and developed for use as diagnostic *** study focused on deep learning models to classify degenerative arthritis into Kellgren–Lawrence ***,degenerative arthritis was assessed by X-ray radiographic images and classified into five ***,the use of various deep learning models was investigated for automating the degenerative arthritis classification *** research on the classification of osteoarthritis using deep learning has been conducted in previous studies,only local models have been used,and an ensemble of deep learning models has never been applied to obtain more accurate *** address this issue,this study compared the classification performance of deep learning models,includingVGGNet,DenseNet,ResNet,TinyNet,EfficientNet,MobileNet,Xception,and ViT,on a dataset commonly used for osteoarthritis classification *** experimental results verified that even without applying a separate methodology,the performance of the ensemble was comparable to that of existing studies that only used the latest deep learning model and changed the learning *** the trained models,two ensembles were created and evaluated:weight and *** weight ensemble showed an improvement in accuracy of 1%,and the proposed specialist ensemble improved accuracy,precision,recall,and F1 score by 5%,6%,6%,and 6%,respectively,compared with the results of prior studies.

关键词： Knee osteoarthritis deep learning convolutional neural network Kellgren–Lawrence grade classification knee X-ray

Closed-loop Control Using High Power Hexapole Magnetic Tweezers for 3D Micromanipulation

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Journal of Bionic Engineering 2020年第1期17卷 113-122页

作者： Xiao Zhang Louis WRogowski min Jun kim Department of Mechanical Engineering Southern Methodist UniversityDallasTX 75275USA

This paper presents the design,modeling,integration,and application of 3D printed high power hexapole magnetic tweezers for 3D micromanipulation *** sharp-tipped magnetic poles were configured with electromagnetic coils and mounted on 3D printed magnetic yokes to form a tilted Cartesian coordinate system for actuation.A closed loop control algorithm was developed to automatically manipulate external power supplies connected to the magnetic tweezers,by using 3D positional information obtained from real-time image processing *** compared against other designs of magnetic tweezers,our system has a larger working space and can generate higher magnetic field *** allows for more diverse applications regarding small scale manipulation,including cell manipulation and cell *** and analytics explained in this paper demonstrate the closed-loop manipulation of microswimmers can provide a magnetic force as high as 800 pN while maintaining a positional error below 4μm in 3D and 1.6μm in *** the desired location as the control input,the microswimmers investigated were able to achieve arbitrary 2D and 3D *** also show that the implemented hexapole magnetic tweezers have adequate power to control microswimmers in Newtonian fluid *** system will later be optimized and deployed to control microswimmers in non-Newtonian fluid environments.

关键词： magnetic tweezers micromanipulation magnetic gradient control 3D motion control microswimmers

The Southern Annular Mode(SAM) in PMIP2 Simulations of the Last Glacial Maximum

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Advances in Atmospheric Sciences 2014年第4期31卷 863-878页

作者： Seong-Joong kim L Junmei Baek-min kim Korea Polar Research Institute KORDI Chinese Academy of Meteorological Sciences

The increasing trend of the Southern Annular Mode （SAM） in recent decades has influenced climate change in the Southem Hemisphere （SH）.How the SAM will respond increased greenhouse gas concentrations in the future remains *** the variability of the SAM in the past under a colder climate such as during the Last Glacial Maximum （LGM） might provide some understanding of the response of the SAM under a future warmer *** analyzed the changes in the SAM during the LGM in comparison to pre-industrial （PI） simulations using five coupled ocean-atmosphere models （CCSM,FGOALS,IPSL,MIROC,HadCM） from the second phase of the Paleoclimate Modelling Intercomparison Project （PMIP2）.In CCSM,MIROC,IPSL,and FGOALS,the variability of the simulated SAM appears to be reduced in the LGM compared to the PI simulations,with a decrease in the standard deviation of the SAM ***,four out of the five models suggest a weaker SAM amplitude in the LGM consistent with a weaker SH polar vortex and westerly winds found in some proxy records and model *** weakening of the SAM in the LGM was associated with an increase in the vertical propagation of Rossby waves in southern high latitudes.

关键词： Southern Annular Mode Last Glacial Maximum PMIP2 Southern Hemisphere westerly winds

Motor function outcomes of pediatric patients with hemiplegic cerebral palsy after rehabilitation treatment:a diffusion tensor imaging study

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Neural Regeneration Research 2015年第4期10卷 624-630页

作者： Jin Hyun kim Yong min Kwon Su min Son Department of Physical Medicine and Rehabilitation School of MedicineYeungnam University

Previous diffusion tensor imaging （DTI） studies regarding pediatric patients with motor dys-function have conifrmed the correlation between DTI parameters of the injured corticospinal tract and the severity of motor dysfunction. There is also evidence that DTI parameters can help predict the prognosis of motor function of patients with cerebral palsy. But few studies are re-ported on the DTI parameters that can relfect the motor function outcomes of pediatric patients with hemiplegic cerebral palsy after rehabilitation treatment. In the present study, 36 pediatric patients with hemiplegic cerebral palsy were included. Before and after rehabilitation treatment, DTI was used to measure the ifber number （FN）, fractional anisotropy （FA） and apparent dif-fusion coefifcient （ADC） of bilateral corticospinal tracts. Functional Level of Hemiplegia scale （FxL） was used to assess the therapeutic effect of rehabilitative therapy on clinical hemiplegia. Correlation analysis was performed to assess the statistical interrelationship between the change amount of DTI parameters and FxL. DTI ifndings obtained at the initial and follow-up evalua-tions demonstrated that more affected corticospinal tract yielded signiifcantly decreased FN and FA values and signiifcantly increased ADC value compared to the less affected corticospinal tract. Correlation analysis results showed that the change amount of FxL was positively correlated to FN and FA values, and the correlation to FN was stronger than the correlation to FA. The results suggest that FN and FA values can be used to evaluate the motor function outcomes of pediatric patients with hemiplegic cerebral palsy after rehabilitation treatment and FN is of more signiif-cance for evaluation.

关键词： nerve regeneration cerebral palsy corticospinal tract diffusion tensor hemiplegia motor rehabilitation neural regeneration

Effects of Processing Parameters on Microstructure and Properties of Ultra High Strength Linepipe Steel

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Journal of Materials Science & Technology 2012年第10期28卷 889-894页

作者： Xiaodan Wu Hakcheol Lee Young min kim Nack J.kim University of Pittsburgh Pittsburghl PA 15213USA Pohang University of Science and Technology Pohang 790-784Korea

To examine the effect of processing parameters on microstructural evolution and to obtain the excellent combination of strength and toughness, simulation of thermo-mechanical processing was conducted using the Gleeble machine. Trial production was then conducted under the conditions obtained by Gleeble tests. Based on the results of microstructure analysis and mechanical property evaluation, the relationship between microstructural features and mechanical properties was elucidated. The result shows that the volume fraction of constituted phases can be controlled through adjusting the cooling rate and finish cooling temperature in order to get different strength levels. As cooling rate increases, the volume fraction of upper bainite increases, which leads to the increase of strength. The upper shelf energy （USE） increases with increasing volume fraction of acicular ferrite in bainite base because of the small effective acicular ferrite grain size. Ductile-brittle transition temperature （DBTT） decreases with increasing acicular ferrite volume fraction. High reduction in the rough stage has great influence on grain refinement.

关键词： Linepipe steel Microstructure Gleeble test TMCP (thermomechanicalcontrol process)

Activation of less affected corticospinal tract and poor motor outcome in hemiplegic pediatric patients:a diffusion tensor tractography imaging study

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Neural Regeneration Research 2015年第12期10卷 2054-2059页

作者： Jin Hyun kim Su min Son Department of Physical Medicine and Rehabilitation College of MedicineYeungnam University

The less affected hemisphere is important in motor recovery in mature ***,in terms of motor outcome in immature brains,no study has been reported on the less affected corticospinal tract in hemiplegic pediatric ***,we examined the relationship between the condition of the less affected corticospinal tract and motor function in hemiplegic pediatric *** patients with hemiplegia due to perinatal or prenatal injury（13.7±3.0 months）and 40 age-matched typically developing controls were *** patients were divided into two age-matched groups,the high functioning group（20 patients）and the low functioning group（20 patients）using functional level of hemiplegia *** tensor tractography images showed that compared with the control group,the patient group of the less affected corticospinal tract showed significantly increased fiber number and significantly decreased fractional anisotropy *** increased fiber number and significantly decreased fractional anisotropy value in the low functioning group were observed than in the high functioning *** findings suggest that activation of the less affected hemisphere presenting as increased fiber number and decreased fractional anisotropy value is related to poor motor function in pediatric hemiplegic patients.

关键词： nerve regeneration unaffected hemisphere hemiplegia corticospinal tract diffusiontensor imaging motor function neural regeneration