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Bonding effect of liquid magnesium with open-celled carbon foam in interpenetrating phase composite

Journal of Magnesium and Alloys 2021年第1期9卷 156-165页

作者： marcin godzierz Anita Olszowka-Myalska Natalia Sobczak Rafal Nowak Patryk Wrze'sniowski Silesian University of Technology Faculty of Materials EngineeringKrasi´nskiego 8 street40-019 KatowicePoland Institute of Metallurgy and Materials Science Polish Academy of SciencesRaymonta 25 streetKrakówPoland Łukasiewicz Foundry Research Institute Zakopia´nska 73 street30-418 KrakówPoland

The issue of bonding formation in liquid metal/open-celled carbon foam(C_(of))systems was examined,taking into account the practical aspects of the synthesis of a new type of Mg-C metal material *** problem is complex due to the strong oxidation and intense evaporation of liquid magnesium,as well as the 3D geometry of the carbon component,where metal transport occurred through the foam cells’*** experiments performed at 700℃ in ceramic crucibles showed that spontaneous carbon foam infiltration by liquid metal is impossible under the applied conditions,either in an air atmosphere coupled with flux protection or under argon *** tests performed in a UHV chamber filled with static pure Ar by a sessile drop method,coupled with non-contact heating and capillary purification at a test temperature of 700℃ directly in the UHV chamber,showed non-wetting behavior of the Mg/C_(of)couple with a correspondingly high contact angle of about 135°.The graphite capillary was then moved down,the liquid drop being slightly pressed into the foam,but these changes did not induce effective foam *** the short contact time for the sessile drop test under an argon atmosphere,SEM+WDS analysis of the solidified Mg/C_(of)couple revealed the formation of an MgO interlayer at the interface,with a thickness of approx.1μ*** experimentally demonstrated presence of oxygen in the carbon foam sample,both before and after its contact with magnesium,points to oxide-type bonding being established between Mg and C_(of).This observation is in a good agreement with previous reports on the interface characterization of magnesium matrix composites reinforced with glassy carbon materials and carbon fibers by stir casting and pressure *** on the findings of this study,a general structural scheme of the bonding process between carbon foam and liquid magnesium,as an important stage in the syntheses of Mg-C composites,was proposed.

关键词： Magnesium matrix composite Open-celled carbon foam Interpenetrating phase composites Wetting Interface

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No effect of invasive tree species on aboveground biomass increments of oaks and pines in temperate forests

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Forest Ecosystems 2024年第4期11卷 401-413页

作者： Sebastian Bury marcin K.Dyderski Institute of Dendrology Polish Academy of SciencesParkowa 562-035 KornikPoland

Prunus serotina and Robinia pseudoacacia are the most widespread invasive trees in Central *** addition,according to climate models,decreased growth of many economically and ecologically important native trees will likely be observed in the *** aimed to assess the impact of these two neophytes,which differ in the biomass range and nitrogen-fixing abilities observed in Central European conditions,on the relative aboveground biomass increments of native oaks Qucrcus robur and *** and Scots pine Pinus *** aimed to increase our understanding of the relationship between facilitation and competition between woody alien species and overstory native *** established 72 circular plots(0.05 ha)in two different forest habitat types and stands varying in age in western *** chose plots with different abundances of the studied neophytes to determine how effects scaled along the quantitative invasion ***,we collected growth cores of the studied native species,and we calculated aboveground biomass increments at the tree and stand ***,we used generalized linear mixed-effects models to assess the impact of invasive species abundances on relative aboveground biomass increments of native tree *** did not find a biologically or statistically significant impact of invasive *** or *** on the relative aboveground,biomass increments of native oaks and pines along the quantitative gradient of invader biomass or on the proportion of total stand biomass accounted for by *** neophytes did not act as native tree growth stimulators but also did not compete with them for resources,which would escalate the negative impact of climate change on pines and *** neophytes should not significantly modify the carbon sequestration capacity of the native *** work combines elements of the per capita effect of invasion with research on mixed forest management.

关键词： Invasion ecology Exotic trees Relative aboveground biomass increment Competition Facilitation Carbon sequestration

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A Survey on Sensor-and Communication-Based Issues of Autonomous UAVs

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1019-1050页

作者： Pavlo Mykytyn marcin Brzozowski Zoya Dyka Peter Langendoerfer IHP-Leibniz-Institut für Innovative Mikroelektronik Wireless SystemsFrankfurt(Oder)15236Germany BTU Cottbus-Senftenberg Faculty 1:MINTCottbus03046German

The application field for Unmanned Aerial Vehicle (UAV) technology and its adoption rate have been increasingsteadily in the past years. Decreasing cost of commercial drones has enabled their use at a scale broader thanever before. However, increasing the complexity of UAVs and decreasing the cost, both contribute to a lack ofimplemented securitymeasures and raise new security and safety concerns. For instance, the issue of implausible ortampered UAV sensor measurements is barely addressed in the current research literature and thus, requires moreattention from the research community. The goal of this survey is to extensively review state-of-the-art literatureregarding common sensor- and communication-based vulnerabilities, existing threats, and active or passive cyberattacksagainst UAVs, as well as shed light on the research gaps in the literature. In this work, we describe theUnmanned Aerial System (UAS) architecture to point out the origination sources for security and safety *** the coverage and completeness of each related research work in a comprehensive comparison table as wellas classify the threats, vulnerabilities and cyber-attacks into sensor-based and communication-based ***, for each individual cyber-attack, we describe existing countermeasures or detectionmechanisms andprovide a list of requirements to ensureUAV’s security and *** also address the problem of implausible sensormeasurements and introduce the idea of a plausibility check for sensor data. By doing so, we discover additionalmeasures to improve security and safety and report on a research niche that is not well represented in the currentresearch literature.

关键词： Unmanned aerial vehicle unmanned aerial system cyber security and privacy drone swarm security vulnerabilities cyber-threats cyber-attacks plausibility check

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Efficient slope reliability analysis under soil spatial variability using maximum entropy distribution with fractional moments

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1140-1152页

作者： Chengxin Feng Marcos A.Valdebenito marcin Chwała Kang Liao Matteo Broggi Michael Beer Institute for Risk and Reliability Leibniz University HannoverCallinstr.34Hannover30167Germany Chair for Reliability Engineering TU Dortmund UniversityLeonhard-Euler-Str.5Dortmund44227Germany Faculty of Civil Engineering Wrocƚaw University of Science and TechnologyWrocƚawPoland Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu610031China University of Liverpool Institute for Risk and UncertaintyPeach StreetLiverpoolL69 7ZFUnited Kingdom International Joint Research Center for Resilient Infrastructure & International Joint Research Center for Engineering Reliability and Stochastic Mechanics Tongji UniversityShanghaiChina

Spatial variability of soil properties imposes a challenge for practical analysis and design in geotechnical *** latter is particularly true for slope stability assessment,where the effects of uncertainty are synthesized in the so-called probability of *** probability quantifies the reliability of a slope and its numerical calculation is usually quite involved from a numerical *** view of this issue,this paper proposes an approach for failure probability assessment based on Latinized partially stratified sampling and maximum entropy distribution with fractional *** spatial variability of geotechnical properties is represented by means of random fields and the Karhunen-Loève ***,failure probabilities are estimated employing maximum entropy distribution with fractional *** application of the proposed approach is examined with two examples:a case study of an undrained slope and a case study of a slope with cross-correlated random fields of strength parameters under a drained *** results show that the proposed approach has excellent accuracy and high efficiency,and it can be applied straightforwardly to similar geotechnical engineering problems.

关键词： Slope Random field Reliability analysis Maximum entropy distribution Latinized partial stratified sampling

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Short neuropeptide F in integrated insect physiology

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第5期25卷 389-409页

作者： marcin CHOLEWINSKI Szymon CHOWANSKI Jan LUBAWY Arkadiusz URBANSKI Karolina WALKOWIAK-NOWICKA Paweł marcinIAK Department of Animal Physiology and Developmental Biology Adam Mickiewicz UniversityPoznan 61-614Poland

The short neuropeptide F(sNPF)family of peptides is a multifunctional group of neurohormones involved in the regulation of various physiological processes in *** have been found in a broad spectrum of species,but the number of isoforms in the precursor molecule varies from one to *** receptor for sNPF(sNPFR),which belongs to the G protein-coupled receptor family,has been characterized in various insect orders and was shown to be an ortholog of the mammalian prolactin-releasing peptide receptor(PrPR).The sNPF signaling pathway interacts with other neurohormones such as insulin-like peptides,SIFamide,and pigment-dispersing factors(PDFs)to regulate various *** main physiological function of sNPF seems to be involved in the regulation of feeding,but the observed effects are *** is also connected with the regulation of foraging behavior and the olfactory *** influence of sNPF on feeding and thus energy metabolism may also indirectly affect other vital processes,such as reproduction and *** addition,these neurohormones are involved in the regulation of locomotor activity and circadian rhythm in *** review summarizes the current state of knowledge about the sNPF system in insects.

关键词： Insect neuropeptide Invertebrate neurobiology Short neuropeptide F(sNPF) Feeding Neurohormone

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Copernicrinus zamorae *** ***.,the oldest thiolliericrinid crinoid(Crinoidea,Echinodermata) from the Bajocian strata of Algeria,Africa

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Journal of Palaeogeography 2024年第2期13卷 237-251页

作者： Bartosz J.Pιachno Madani Benyoucef Fayc al Mekki Mohammed Adaci Imad Bouchemla Sreepat Jain marcin Krajewski Mariusz A.Salamon Faculty of Biology Institute of BotanyJagiellonian University in KrakowGronostajowa Street 930-387 KrakowPoland Laboratoire de Géomatique Ecologie et EnvironnementMustapha Stambouli University of MascaraDZ-29000 MascaraAlgeria Abou Bekr Belkaid University of Tlemcen TlemcenAlgeria Department of Geological Sciences Faculty of Biological and Agricultural SciencesMouloud Mammeri University of Tizi-OuzouTizi-OuzouAlgeria Adama Science and Technology University School of Applied Natural SciencesDepartment of Applied GeologyP.O.Box 1888AdamaEthiopia Faculty of Geology Geophysics and Environmental ProtectionAGH University of Science and TechnologyAl.A.Mickiewicza 30PL-30-059KrakowPoland Faculty of Natural Sciences University of Silesia in KatowiceBedzinska Street 60PL-41-200 SosnowiecPoland

The thiolliericrinids(Thiolliericrinidae) are comatulids(Comatulida),which retained their stalks as ***,we report a centrodorsal from the Bajocian strata(Middle Jurassic) of the Djebel Kérdacha area,northwestern Algeria(Africa).It is the first thiolliericrinid report from outside of Europe and also the oldest representative of the Thiolliericrinidae whose first occurrence is from the *** crinoid is assigned to Copernicrinus zamorae *** *** reported new taxon shows strong similarities with the stemless ‘true’comatulids,Solanocrinites;the only difference is the presence of a facet to the stem in *** closest comparable thiolliericrinid to Copernicrinus is the Oxfordian Thiolliericrinus,interpreted as a descendant of the *** origin and overview of all thiolliericrinid representatives are also discussed herein.

关键词： Thiolliericrinidae Crinoids Coral facies Bajocian Jurassic Algeria Southern Tethys margin

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Needle arthroscopic-assisted repair of tibio-fibular syndesmosis acute injury:A case report

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World Journal of Orthopedics 2024年第8期15卷 820-827页

作者： Blazej G Wojtowicz marcin Domzalski Jedrzej Lesman Department of Orthopedy and Trauma Medical University of LodzLodz 90-549LodzPoland

BACKGROUND Acute injuries to the tibiofibular syndesmosis,often associated with high ankle sprains or malleolar fractures,require precise diagnosis and treatment to prevent long-term *** case report explores the use of needle arthroscopy as a minimally invasive technique for the repair of tibiofibular syndesmosis *** SUMMARY We report on a 40-year-old male patient who presented with a trimalleolar fracture and ankle subluxation following a high ankle *** to significant swelling and poor soft tissue quality,initial management involved external ***,needle arthroscopy was employed to assess and treat the tibiofibular syndesmosis *** procedure,performed under spinal anesthesia and fluoroscopic control,included nanoscopic evaluation of the ankle joint and reduction of the syndesmosis using a suture ***-up assessments showed significant improvement in pain levels,range of motion,and functional *** 26 weeks post-procedure,the patient achieved full range of motion and pain-free *** arthroscopy offers a promising alternative for the management of acute tibiofibular syndesmosis injuries,combining diagnostic and therapeutic capabilities with minimal *** This technique may enhance clinical outcomes and reduce recovery times,warranting further investigation and integration into clinical practice.

关键词： Needle arthroscopy Tibiofibular syndesmosis Acute injury Ankle fracture Minimally invasive surgery Case report

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Retrospective study of the incidence, risk factors, treatment outcomes of bacterial infections at uncommon sites in cirrhotic patients

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World Journal of Hepatology 2024年第3期16卷 418-427页

作者： Sophie Schneitler Christina Schneider Markus Casper Frank Lammert marcin Krawczyk Sören L Becker Matthias Christian Reichert Institute of Medical Microbiology and Hygiene Saarland UniversityHomburg 66421Germany Department of Medicine II Saarland University Medical CenterHomburg 66421Germany Health Sciences Hannover Medical SchoolHannover 30625Germany Laboratory of Metabolic Liver Diseases Department of GeneralTransplant and Liver SurgeryCentre for Preclinical ResearchMedical University of WarsawWarsaw 02-097Poland

BACKGROUND Bacterial infections(BI)negatively affect the natural course of *** most frequent BI are urinary tract infections(UTI),pneumonia,and spontaneousbacterial peritonitis(SBP).AIM To assess the relevance of bacterial infections beyond the commonly recognized types in patients with cirrhosis and to investigate their relationship with other clinical *** We retrospectively analyzed patients with cirrhosis and BI treated between 2015 and 2018 at our tertiary care *** were classified as typical and atypical,and clinical as well as laboratory parameters were compared between the two *** In a cohort of 488 patients with cirrhosis,we identified 225 typical BI(95 UTI,73 SBP,72 pulmonary infections)and 74 atypical BIs,predominantly cholangitis and soft tissue infections(21 each),followed by intra-abdominal BIs(n=9),cholecystitis(n=6),head/throat BIs(n=6),osteoarticular BIs(n=5),and endocarditis(n=3).We did not observe differences concerning age,sex,or etiology of cirrhosis in patients with typical vs atypical *** BIs were more common in patients with more advanced cirrhosis,as evidenced by Model of End Stage Liver Disease(15.1±7.4 vs 12.9±5.1;P=0.005)and Child-Pugh scores(8.6±2.5 vs 8.0±2;P=0.05).CONCLUSION Atypical BIs in cirrhosis patients exhibit a distinct spectrum and are associated with more advanced stages of the ***,the work-up of cirrhosis patients with suspected BI requires detailed work-up to elucidate whether typical BI can be identified.

关键词： Bacterial infection Empirical antibiotic therapy End-stage liver disease Escherichia coli Multi-resistant pathogens

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Application of graph-curvature features in computer-aided diagnosis for histopathological image identification of gastric cancer

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Intelligent Medicine 2024年第3期4卷 141-152页

作者： Ruilin He Chen Li Xinyi Yang Jinzhu Yang Tao Jiang marcin Grzegorzek Hongzan Sun Microscopic Image and Medical Image Analysis Group College of Medicine and Biological Information EngineeringNortheastern UniversityShenyangLiaoning 110016China Key Laboratory of Intelligent Computing in Medical Image Ministry of EducationNortheastern UniversityShenyangLiaoning 110016China School of Intelligent Medicine Chengdu University of Traditional Chinese MedicineChengduSichuan 610075China International Joint Institute of Robotics and Intelligent Systems Chengdu University of Information TechnologyChengduSichuan 610225China Institute for Medical Informatics University of LuebeckLuebeckGermany Department of Knowledge Engineering University of Economics in KatowiceKatowicePoland Shengjing Hospital of China Medical University ShenyangLiaoning 110136China

Background Histopathology diagnosis is often regarded as the final diagnostic method for malignant tumors;however,it has some *** study explored a computer-aided diagnostic method that can be used to identify benign and malignant gastric cancer using histopathological *** The most suitable process was selected through multiple experiments by comparing multiple meth-ods and features for ***,the U-net was applied to segment the ***,the nucleus was extracted from the segmented image,and the minimum spanning tree(MST)diagram structure that can cap-ture the topological information was *** third step was to extract the graph-curvature features of the histopathological image according to the MST ***,by inputting the graph-curvature features into the classifier,the recognition results for benign or malignant cancer can be *** During the experiment,we used various methods for *** the image segmentation stage,U-net,watershed algorithm,and Otsu threshold segmentation methods were *** found that the U-net method,combined with multiple indicators,was the most suitable for segmentation of histopathological *** the feature extraction stage,in addition to extracting graph-edge and graph-curvature features,several basic im-age features were extracted,including the red,green and blue feature,gray-level co-occurrence matrix feature,histogram of oriented gradient feature,and local binary pattern *** the classifier design stage,we exper-imented with various methods,such as support vector machine(SVM),random forest,artificial neural network,K nearest neighbors,VGG-16,and *** comparison and analysis,it was found that classifica-tion results with an accuracy of 98.57%can be obtained by inputting the graph-curvature feature into the SVM classifier.

关键词： Gastric cancer Graph-curvature feature Image identification

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Increasing the accuracy and reproducibility of positron emission tomography radiomics for predicting pelvic lymph node metastasis in patients with cervical cancer using 3D local binary pattern-based texture features

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Intelligent Medicine 2024年第3期4卷 153-160页

作者： Yang Yu Xiaoran Li Tianming Du Md Rahaman marcin Jerzy Grzegorzek Chen Li Hongzan Sun Department of Radiology Shengjing Hospital of China Medical UniversityShenyangLiaoning 110001China Liaoning Provincial Key Laboratory of Medical Imaging School of Computer Science and Engineering Northeastern UniversityShenyangLiaoning 110169China Department of Radiology Xuanwu HospitalCapital medical UniversityBeijing 100053China Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics Peking University Health Science CenterBeijing 100191China College of Medicine and Biological Information Engineering Northeastern UniversityShenyangLiaoning 110169China The University of New South Wales Australia University of Lübeck Germany

Background The reproducibility of positron emission tomography(PET)radiomics features is affected by several factors,such as scanning equipment,drug metabolism time and reconstruction *** aimed to explore the role of 3D local binary pattern(LBP)-based texture in increasing the accuracy and reproducibility of PET radiomics for predicting pelvic lymph node metastasis(PLNM)in patients with cervical *** We retrospectively analysed data from 177 patients with cervical squamous cell *** un-derwent18 F-fluorodeoxyglucose(18 F-FDG)whole-body PET/computed tomography(PET/CT),followed by pelvic 18 F-FDG PET/magnetic resonance imaging(PET/MR).We selected reproducible and informative PET radiomics features using Lin’s concordance correlation coefficient,least absolute shrinkage and selection operator algorithm,and established 4 models,PET/CT,PET/CT-fusion,PET/MR and PET/MR-fusion,using the logistic regression *** performed receiver operating characteristic(ROC)curve analysis to evaluate the models in the training data set(65 patients who underwent radical hysterectomy and pelvic lymph node dissection)and test data set(112 patients who received concurrent chemoradiotherapy or no treatment).The DeLong test was used for pairwise comparison of the ROC curves among the *** The distribution of age,squamous cell carcinoma(SCC),International Federation of Gynaecology and Obstetrics stage and PLNM between the training and test data sets were different(PPET/MR=PET/MR-fusion(0.954).There was no statistical difference between the ROC curve of PET/CT and PET/MR models in both data sets(P>0.05).Conclusions The LBP-transformed radiomics features based on PET ima

关键词： Positron emission tomography Radiomics Cervical cancer Reproducibility Pelvic lymph node metastasis

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