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Minimum dose path planning for facility inspection based on the discrete Rao-combined ABC algorithm in radioactive environments with obstacles

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Nuclear Science and Techniques 2023年第4期34卷 26-40页

作者： Kwon Ryong Hong Su Il O Ryon hui kim Tae Song kim Jang Su kim Faculty of Energy Science Kim Il Sung UniversityPyongyangDemocratic People’s Republic of Korea High-Tech Research&Development Centre Institute of Information TechnologyKim Il Sung UniversityPyongyangDemocratic People’s Republic of Korea

Workers who conduct regular facility inspections in radioactive environments will inevitably be affected by ***,it is important to optimize the inspection path to ensure that workers are exposed to the least amount of *** study proposes a discrete Rao-combined artificial bee colony(ABC)algorithm for planning inspection paths with minimum exposure doses in radioactive environments with *** this algorithm,retaining the framework of the traditional ABC algorithm,we applied the directional solution update rules of Rao algorithms at the employed bee stage and onlooker bee stage to increase the exploitation ability of the algorithm and implement discretion using the swap operator and swap *** increase the randomness of solution generation,the chaos algorithm was used at the initialization *** K-opt operation technique was introduced at the scout bee stage to increase the exploration ability of the *** path planning in an environment with complex structural obstacles,an obstacle detour technique using a recursive algorithm was *** evaluate the performance of the proposed algorithm,we performed experimental simulations in three hypothetical environments and compared the results with those of improved particle swarm optimization,chaos particle swarm optimization,improved ant colony optimization,and discrete Rao’s *** experimental results show the high performance of the proposed discrete Rao-combined ABC algorithm and its obstacle detour capability.

关键词： Minimum dose Path planning Nuclear facility inspection ABC algorithm Rao algorithms Swap sequence K-opt operation

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Significance of dysplasia in bile duct resection margin in patients with extrahepatic cholangiocarcinoma:A retrospective analysis

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World Journal of Clinical Cases 2022年第10期10卷 3078-3087页

作者： Jung Wan Choe Hyo Jung kim jae Seon kim Department of Internal Medicine Korea University Ansan HospitalKorea University College of MedicineAnsan 15355South Korea Department ofInternal Medicine Korea University Guro HospitalKorea University College of MedicineSeoul 08308South Korea Department ofInternal Medicine Korea University Guro Hospital2

BACKGROUND Radical resection is the only indicator associated with survival in extrahepatic cholangiocarcinoma(EHCC).However,limited data are available regarding the implications of dysplasia at the resection margin following *** To evaluate the prognostic significance of dysplasia-positive margins in patients diagnosed with *** We reviewed the records of patients who had undergone surgery for EHCC with curative intent between January 2013 and July *** retrospectively analyzed the clinicopathological data of 116 patients followed for longer than 3 *** status of resection margin was used to classify patients into negative low-grade dysplasia(LGD)and high-grade dysplasia(HGD)/carcinoma in situ(CIS)*** Based on postoperative status,72 patients underwent resection with negative margins,19 had LGD-positive margins,and 25 showed HGD/CIS-positive *** mean survival rates of the patients with negative margins,LGD margins,and HGD/CIS margins were 49.1±4.5,47.3±6.0,and 20.8±4.4 mo,respectively(P70 years and HGD/CIS-positive margins were significant independent factors for survival(hazard ratio=1.90 and 2.47,respectively).CONCLUSION HGD/CIS margin in resected EHCC is associated with a poor ***,the LGDpositive resection margin is not a significant indicator of survival in patients with EHCC.

关键词： Dysplasia Cholangiocarcinoma Survival Extrahepatic cholangiocarcinoma Low-grade dysplasia High-grade dysplasia

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User Recognition System Based on Spectrogram Image Conversion Using EMG Signals

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Computers, Materials & Continua 2022年第7期72卷 1213-1227页

作者： jae Myung kim Gyu Ho Choi Min-Gu kim Sung Bum Pan Interdisciplinary Program in IT-Bio Convergence System Chosun UniversityGwangju61452Korea IT Research Institute Chosun UniversityGwangju61452Korea

Recently,user recognitionmethods to authenticate personal identity has attracted significant attention especially with increased availability of various internet of things(IoT)services through fifth-generation technology(5G)based mobile *** EMG signals generated inside the body with unique individual characteristics are being studied as a part of nextgeneration user recognition ***,there is a limitation when applying EMG signals to user recognition systems as the same operation needs to be repeated while maintaining a constant strength of muscle over ***,it is necessary to conduct research on multidimensional feature transformation that includes changes in frequency features over *** this paper,we propose a user recognition system that applies EMG signals to the short-time fourier transform(STFT),and converts the signals into EMG spectrogram images while adjusting the time-frequency resolution to extract multidimensional *** proposed system is composed of a data pre-processing and normalization process,spectrogram image conversion process,and final classification *** experimental results revealed that the proposed EMG spectrogram image-based user recognition system has a 95.4%accuracy performance,which is 13%higher than the EMGsignal-based *** a user recognition accuracy improvement was achieved by using multidimensional features,in the time-frequency domain.

关键词： EMG user recognition spectrogram CNN

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Lymph-node-first presentation of Kawasaki disease in a 12-year-old girl with cervical lymphadenitis caused by Mycoplasma pneumoniae:A case report

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World Journal of Clinical Cases 2022年第10期10卷 3170-3177页

作者： Nayoung kim Young-Jin Choi jae Yoon Na jae-Won Oh Department of Pediatrics Hanyang University Seoul HospitalSeoul 04763South Korea Department of Pediatrics Hanyang University Guri HospitalGuri-si 11923South Korea Department of Pediatrics Hanyang University School of MedicineSeoul 04763South Korea

BACKGROUND To the best of our knowledge,cases of Kawasaki disease(KD)occurring at the age of 12 are rare,even in Asia where the incidence of KD is *** report a case of lymph-node-first presentation of KD(NFKD)in a 12-year-old girl with Mycoplasma pneumoniae(***)infection who presented with prolonged fever and lymphadenitis refractory to macrolide *** SUMMARY A previously healthy 12-year-old girl presented with fever,myalgia,sore throat,swelling,and tenderness on the right side of the *** was initially diagnosed with lymphadenitis caused by *** refractory to macrolide *** had elevated brain natriuretic peptide(BNP)***,the patient was diagnosed with *** receiving intravenous immunoglobulin,the fever resolved,and her symptoms *** NFKD should be differentiated from adolescent lymphadenitis presenting with prolonged fever by checking the BNP level early.

关键词： Lymphadenopathy Mycoplasma pneumoniae Node-first presentation of Kawasaki disease Case report

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Update of sentinel lymph node mapping assessment in endometrial cancer

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Gynecology and Obstetrics Clinical Medicine 2023年第1期3卷 1-6页

作者： Se Ik kim jae-Weon kim Department of Obstetrics and Gynecology Seoul National University College of MedicineSeoul03080Republic of Korea

Endometrial cancer is the most common gynecologic malignancy in developed *** confirmation of lymph node metastasis is important for risk stratification and the administration of adjuvant ***,comprehensive,systematic lymphadenectomy has been routinely performed but has been associated with various ***,the concept of sentinel lymph node(SLN)mapping and biopsy has emerged and is now accepted as an alternative to conventional systematic lymphadenectomy in early-stage endometrial *** better management of endometrial cancer,we conducted a literature review to summarize the role and diagnostic accuracy of the SLN mapping strategy in endometrial *** from the monumental and recent literature and ongoing clinical trials will be introduced.

关键词： Endometrial cancer Sentinel lymph node Lymph node metastasis Accuracy Prognosis Survival

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Computed tomography coronary angiography after excluding myocardial infarction:high-sensitivity troponin versus risk score-guided approach

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World Journal of Emergency Medicine 2023年第6期14卷 428-433页

作者： Won jae Yoo Shin Ahn Bora Chae Won Young kim Department of Emergency Medicine Asan Medical CenterUniversity of Ulsan College of MedicineSeoul 05505Republicof Korea

BACKGROUND:Patients with suspected acute coronary syndrome (ACS) in whom myocardial infarction has been ruled out are still at risk of having obstructive coronary artery disease (CAD).This rate is higher among patients with intermediate high-sensitivity troponin I (hsTnI) concentrations (5 ng/L to 99th percentile) than low concentrations (<5 ng/L).Therefore,an intermediate concentration has been suggested as a candidate for downstream investigation with computed tomography coronary angiography(CTCA).We tried to compare the HEART score-guided ***-guided approach for identifying obstructive ***:From a prospective cohort study of patients presenting to the emergency department with suspected ACS,433 patients without elevated hsTnI who also underwent CTCA were selected and *** performances of hsTnI concentration and HEART score were compared using sensitivity,specificity,positive predictive value (PPV),and negative predictive value (NPV).RESULTS:Overall,120 (27.7%) patients had obstructive *** with intermediate hsTnI concentrations were more likely to have obstructive CAD than those with low hsTnI concentrations(40.0%vs.18.1%);patients with non-low-risk HEART scores (≥4 points) were also more likely to have obstructive CAD than those with low-risk scores (0 to 3 points)(41.0%vs.7.6%).The HEART score had higher sensitivity and NPV for detecting obstructive CAD in each classification than hsTnI concentration (sensitivity:89.2%vs.63.3%;NPV:92.4%vs.81.9%,respectively).CONCLUSION:After excluding myocardial infarction in patients with suspected ACS,adding the HEART score for selecting candidates for CTCA could improve patient risk stratification more accurately than relying on hsTnI concentration.

关键词： Chest pain Coronary artery disease Acute coronary syndrome Troponin HEART score

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Heterojunction between bimetallic metal-organic framework and TiO_(2):Band-structure engineering for effective photoelectrochemical water splitting

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Nano Research 2022年第9期15卷 8502-8509页

作者： Ji Won Yoon jae-Hyeok kim Young-Moo Jo Jong-Heun Lee Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea

Bimetallic Fe/Ni-based metal-organic frameworks(MOFs)with different Fe/Ni ratios were coated on TiO_(2)nanorods(NRs),and the performances of the heterojunction photoanodes in photoelectrochemical water splitting were *** bandgaps and band positions of the MOFs could be modulated by changing the ratio of the Fe and Ni *** ideal band alignment was achieved between the TiO_(2)NRs and bimetallic MOFs with an optimum ratio of[Fe]/[Ni]=0.25/0.75,which allowed efficient light absorption and charge *** coating of NH_(2)-MIL(Fe)-88 layer on the TiO_(2)NRs decreased the photocurrent density by 33%.In comparison,TiO_(2)/NH_(2)-MIL(Ni)-88 showed a modest improvement in photocurrent density(0.85 mA·cm^(−2)at 1.23 V vs.a reversible hydrogen electrode(RHE)).When bimetallic NH_(2)-MIL(Fe_(0.25)Ni_(0.75))-88 was coated on the TiO_(2)NRs,the photocurrent density reached 1.56 mA·cm^(−2),which was an efficiency enhancement of 3.2 *** mechanism underlying high photoelectrochemical performance was investigated.

关键词： band-structure engineering bimetallic metal-organic frameworks(MOFs) solar water splitting TiO_(2)nanorods NH_(2)-MIL-88

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Effects of Al addition on microstructure and mechanical properties of extruded Mg-3Bi alloy

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Journal of Magnesium and Alloys 2022年第7期10卷 1887-1898页

作者： Sang-Cheol Jin jae Won Cha Jun Ho Bae hui Yu Sung Hyuk Park School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Implementation Research Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China

Effects of Al addition to a Mg±Bi binary alloy on its microstructural characteristics and tensile properties after extrusion are investigated via extrusion of Mg-3Bi±x Al(x=0,1,and 2 wt%)billets and analysis of the extruded *** Al addition negligibly affects the second-phase particles of the extruded alloy;however,an increase in the Al content causes significant decreases in the average grain size and maximum texture intensity of the extruded material owing to an increase in the area fraction of dynamically recrystallized(DRXed)*** Al addition improves the strength of the extruded alloy;this improvement is attributed to the enhanced grain-boundary hardening and solid-solution hardening effects induced by grain refinement and Al solute atoms,*** the Al content increases from 0 wt%to 1 wt%and 2 wt%,the tensile elongation increases substantially from 2.8%to 9.4%and 16.9%,*** reduction in the number and size of un DRXed grains with increasing Al content suppresses the formation and coalescence of cracks in the un DRXed grains during tension,which results in a significant improvement in the tensile ductility of the extruded *** tensile deformation,large undesirable twins that act as crack initiation sites are locally formed in the un DRXed grains of the Mg-3Bi alloy,whereas relatively smaller twins are uniformly formed in both the DRXed and the un DRXed grains of the Mg-3Bi-2Al ***,the extruded Mg-3Bi-2Al alloy has a substantially higher tensile yield strength±elongation product(2924 MPa%)than the extruded Al-free B3 alloy(381 MPa%).

关键词： Mg-Bi-Al alloy Extrusion Microstructure Strength Ductility

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Inverse design of a Si-based high-performance vertical-emitting meta-grating coupler on a220 nm silicon-on-insulator platform

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Photonics Research 2023年第6期11卷 897-905页

作者： JINHYEONG YOON jae-YONG kim JUNHYEONG kim HYEONHO YOON BERKAY NESELI HYO-HOON PARK HAMZA KURT School of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST)DaejeonRepublic of Korea

Efficient extraction of light from a high refractive index silicon waveguide out of a chip is difficult to *** inverse design approach was employed using the particle swarm optimization method to attain a vertical emitting meta-grating coupler with high coupling efficiency in a 220-nm-thick silicon-on-insulator *** carefully selecting the figure of merit and appropriately defining parameter space,unique L-shape and U-shape grating elements that boosted the out-of-plane radiation of light were *** addition,a 65.7%(-1.82 dB)outcoupling efficiency and a 60.2%(-2.2 dB)fiber-to-chip vertical coupling efficiency with an 88 nm 3 dB bandwidth were demonstrated by numerical *** fabrication constraints,the optimized complex meta-grating coupler was modified to correspond to two etching steps and was then fabricated with a complementary metal-oxide-semiconductor-compatible *** modified meta-grating coupler exhibited a simulated coupling efficiency of 57.5%(-2.4 d B)with a 74 nm 3-dB bandwidth in the C-band and an experimentally measured coupling efficiency of 38%(-4.2 dB).

关键词： waveguide coupling insulator

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Neonatal erythema multiforme associated with a rotavirus infection:A case report

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世界临床病例杂志 2023年第24期11卷 5749-5754页

作者： Jung jae kim Joon Kee Lee Department of Pediatrics Chungbuk National University HospitalCheongju 28644South Korea Department of Pediatrics Chungbuk National UniversityCheongju 28644South Korea

BACKGROUND Erythema multiforme(EM)is an extremely rare condition in neonates,and studies suggest its association with certain infections and neonatal vaccinations;however,few specific etiological agents have been ***,a common pathogenic gastrointestinal virus in the neonatal period that is preventable via vaccination,has not been identified as a possible *** report the case of a neonate who was referred for skin lesions presenting as EM,where a meticulous workup identified rotavirus as the sole causative *** SUMMARY A 14-day-old male infant was admitted to our hospital with a 1-day history of skin *** medical history or medication intake was *** for the complaint of skin lesions,the caregivers denied any abnormal *** tests,including routine laboratory evaluations,were performed to identify the cause of skin *** tests for Immunoglobulin M for Toxoplasma,Rubella,Cytomegalovirus,Herpes Simplex Virus,and Epstein-Barr virus viral-capsid antigen were all *** polymerase chain reaction(PCR)tests for respiratory viruses and bacterial pathogens were negative(including the severe acute respiratory syndrome coronavirus 2).Multiple PCR tests for gastrointestinal viruses and bacterial pathogens demonstrated evidence of rotavirus *** growth was reported in the blood and urine *** patient received intravenous fluids for hydration;meanwhile,no other medications were *** lesions improved rapidly without specific treatment,and full recovery was achieved within a *** The possibility of rotavirus,a major cause of pediatric gastrointestinal infections,being a trigger for neonatal EM should be considered.

关键词： Erythema multiforme Gastrointestinal diseases Neonate Rotavirus Skin abnormalities Case report

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