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Selective Absorber Coatings and Technological Advancements in Performance Enhancement for Parabolic Trough Solar Collector

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Journal of Thermal Science 2022年第6期31卷 1990-2008页

作者： ASAAD YASSEEN Al-Rabeeah istvan Seres istvan farkas Doctoral School of Mechanical Engineering Hungarian University of Agriculture and Life SciencesGodollo H-2100Hungary Institute of Mathematics and Basic Science Hungarian University of Agriculture and Life SciencesGodollo H-2100Hungary Institute of Technology Hungarian University of Agriculture and Life SciencesGodollH-2100Hungary

Parabolic trough solar collector systems are the most advanced concentrating solar power technology for large-scale power generation purposes. The current work reviews various selective coating materials and their characteristics for different designs in concentrating solar power. Solar selective absorbing coatings collect solar radiation and convert it to heat. To promote higher efficiency and lower energy costs at higher temperatures requires, this study aims to analyse the fundamental chemistry and thermal stability of some key coatings currently being used and even under investigation to find reasons for differences, information gaps and potential for improvement in results. In recent years, several novel and useful solar absorber coatings have been developed. However, qualification test methods such as corrosion resistance, thermal stability testing and prediction of service life, which have essential technical value for large-scale solar absorbers, are lacking. Coatings are used to enhance the performance of reflectors and absorbers in terms of quality, efficiency, maintenance and cost. Differentiated coatings are required as there are no uniformly perfect materials in various applications, working conditions and material variations. Much more knowledge of the physical and chemical properties and durability of the coatings is required, which will help prevent failures that could not be discovered previously.

关键词： Parabolic trough solar collector selective coatings absorber receivers optical properties thermal stability

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In-situ study of the microstructure evolution during tension of a Mg-Y-Zn-Al alloy processed by rapidly solidified ribbon consolidation technique

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Journal of Magnesium and Alloys 2024年第5期12卷 2024-2040页

作者： Jeno Gubicza Kristián Máthis Péter Nagy Péter Jenei Zoltán Hegedus Andrea farkas Jozef Vesely Shin-ichi Inoue Daria Drozdenko Yoshihito Kawamura Department of Materials Physics Faculty of ScienceEotvos Loránd UniversityPázmány P.sétány 1/ABudapest H-1117Hungary Department of Physics of Materials Faculty of Mathematics and PhysicsCharles UniversityKe Karlovu 512116 Praha 2Czech Republic Deutsches Elektronen-Synchrotron DESY Notkestr.85Hamburg 22603Germany Magnesium Research Center Kumamoto University2-39-1 KurokamiChuo-kuKumamoto 860-8555Japan

Mg-Y-Zn-Al alloys processed by rapidly solidified ribbon consolidation(RSRC)technique exhibit an exceptional mechanical performance indicating promising application *** material has a bimodal microstructure consisting of fine recrystallized and coarse non-recrystallized grains with solute-rich stacking faults forming cluster arranged layers(CALs)and nanoplates(CANaPs),or complete long period stacking ordered(LPSO)*** order to reveal the deformation mechanisms,in-situ synchrotron X-ray diffraction line profile analysis was employed for a detailed study of the dislocation arrangement created during tension in Mg-0.9%Zn-2.05%Y-0.15%Al(at%)*** uncovering the effect of the initial microstructure on the mechanical performance,additional samples were obtained by annealing of the as-consolidated specimen at 300 and 400℃ for 2 *** heat treatment at 300℃ had no significant effect on the initial microstructure,its evolution during tension and,thus,the overall deformation behavior under tensile *** the other hand,annealing at 400℃ resulted in a significant increase of the recrystallized grains fraction and a decrease of the dislocation density,leading to only minor degradation of the mechanical *** maximum dislocation density at the failure of the samples corresponding to the plastic strain of 10-25% was estimated to be about 16-20×10^(14)m^(-2).The diffraction profile analysis indicated that most dislocations formed during tension were of non-basal and pyramidal types,what was also in agreement with the Schmid factor values revealed independently from orientation *** was also shown that the dislocation-induced Taylor hardening was much lower below the plastic strain of 3% than above this value,which was explained by a model of the interaction between prismatic dislocations and CANaPs/LPSO plates.

关键词： Mg-Zn-Y-Al alloy Long period stacking ordered(LPSO)phase Cluster arranged nanoplates(CANaPs) Annealing Tension Dislocation density Hardening

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Effects of neoadjuvant chemotherapy vs chemoradiotherapy in the treatment of esophageal adenocarcinoma:A systematic review and meta-analysis

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World Journal of Gastroenterology 2024年第11期30卷 1621-1635页

作者： Armand Csontos Alíz Fazekas Lajos Szakó Nelli farkas Csenge Papp Szilárd Ferenczi Szabolcs Bellyei Péter Hegyi András Papp Department of Surgery University of PécsMedical SchoolClinical CenterPécs H-7624BaranyaHungary Institute of Bioanalysis University of PécsMedical SchoolPécs H-7624BaranyaHungary Institute for Translational Medicine University of PécsMedical SchoolPécs H-7624BaranyaHungary Department of Emergency Medicine Clinical CenterUniversity of PécsMedical SchoolPécs 7624BaranyaHungary Department of Oncotherapy University of PécsMedical SchoolClinical CenterPécs H-7624BaranyaHungary Centre for Translational Medicine Semmelweis UniversityBudapest 1085Hungary Institute of Pancreatic Diseases Semmelweis UniversityBudapest H-1083Hungary

BACKGROUND Neoadjuvant therapy is an essential modality for reducing the clinical stage of esophageal cancer;however,the superiority of neoadjuvant chemotherapy(nCT)or neoadjuvant chemoradiotherapy(nCRT)is ***,a discussion of these two modalities is *** To investigate the benefits and complications of neoadjuvant *** To address this concern,predefined criteria were established using the PICO *** independent authors performed comprehensive searches using predetermined *** analyses were performed to identify significant differences between *** publication bias was visualized using funnel *** quality of the data was evaluated using the Risk of Bias Tool 2(RoB2)and the GRADE *** Ten articles,including 1928 patients,were included for the *** difference was detected in pathological complete response(pCR)[P<0.001;odds ratio(OR):0.27;95%CI:0.16-0.46],30-d mortality(P=0.015;OR:0.4;95%CI:0.22-0.71)favoring the nCRT,and renal failure(P=0.039;OR:1.04;95%CI:0.66-1.64)favoring the *** significant differences were observed in terms of survival,local or distal recurrence,or other clinical or surgical *** result of RoB2 was moderate,and that of the GRADE approach was low or very low in almost all *** Although nCRT may have a higher pCR rate,it does not translate to greater long-term ***,nCRT is associated with higher 30-d mortality,although the specific cause for postoperative complications could not be *** the case of nCT,toxic side effects are suspected,which can reduce the quality of *** the quality of available studies,further randomized trials are required.

关键词： Neoadjuvant Chemotherapy Chemoradiotherapy Esophageal cancer Adenocarcinoma

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Long-term outcomes after endoscopic removal of malignant colorectal polyps:Results from a 10-year cohort

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World Journal of Gastrointestinal Endoscopy 2024年第4期16卷 193-205页

作者： Anna Fábián Renáta Bor Béla Vasas Mónika Szűcs Tibor Tóth Zsófia Bősze Kata Judit Szántó Péter Bacsur Anita Bálint Bernadett farkas Klaudia farkas Ágnes Milassin Mariann Rutka Tamás Resál Tamás Molnár Zoltán Szepes Department of Internal Medicine University of SzegedSzent-Györgyi Albert Medical SchoolSzeged 6725Hungary Department of Pathology University of SzegedSzent-Györgyi Albert Medical SchoolSzeged 6725Hungary Department of Medical Physics and Medical Informatics University of SzegedSzent-Györgyi Albert Medical SchoolSzeged 6720Hungary USZ Translational Colorectal Research Group Hungarian Centre of Excellence for Molecular MedicineSzeged 6725Hungary

BACKGROUND Choosing an optimal post-polypectomy management strategy of malignant colorectal polyps is challenging,and evidence regarding a surveillance-only strategy is *** To evaluate long-term outcomes after endoscopic removal of malignant colorectal *** A single-center retrospective cohort study was conducted to evaluate outcomes after endoscopic removal of malignant colorectal polyps between 2010 and *** disease rate and nodal metastases after secondary surgery and local and distant recurrence rate for those with at least 1 year of follow-up were *** rates for categorical variables and means for continuous variables with 95%confidence intervals were calculated,and Fisher’s exact test and Mann-Whitney test were *** risk factors of adverse outcomes were RESULTS In total,135 lesions(mean size:22.1 mm;location:42%rectal)from 129 patients(mean age:67.7 years;56%male)were *** proportion of pedunculated and non-pedunculated lesions was similar,with en bloc resection in 82%and 47%of lesions,*** differentiation,distance from resection margins,depth of submucosal invasion,lymphovascular invasion,and budding were reported at 89.6%,45.2%,58.5%,31.9%,and 25.2%,*** tumor was found in 10 patients,and nodal metastasis was found in 4 of 41 patients who underwent secondary surgical *** analysis identified piecemeal resection as a risk factor for residual malignancy(odds ratio:1.74;P=0.042).At least 1 year of follow-up was available for 117 lesions from 111 patients(mean follow-up period:5.59 years).Overall,54%,30%,30%,11%,and 16%of patients presented at the 1-year,3-year,5-year,7-year,and 9-10-year surveillance *** outcomes occurred in 9.0%(local recurrence and dissemination in 4 patients and 9 patients,respectively),with no difference between patients undergoing secondary surgery and surveillance *** Reporting of histological featur

关键词： Malignant colorectal polyps T1 tumor Endoscopic removal Outcomes Long-term Surveillance

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Preparation and application of highly porous aerogel-based bioactive materials in dentistry

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Frontiers of Materials Science 2014年第1期8卷 46-52页

作者： Andrea KUTTOR Melinda SZALOKI TLinde RENTE farkas KERENYI Jozsef BAKO istvan FABIAN istvan LAZAR Attila JENEI Csaba HEGEDUES Department of Prosthetic Dentistry and Biomaterials Faculty of Dentistry University of Debrecen 4012 Debrecen Hungary Aerogel Research Group Department of Inorganic and Analytical Chemistry Faculty of Science University of Debrecen 4010 Debrecen Hungary Department of Dental Biochemistry Faculty of Dentistry University of Debrecen 4012 Debrecen Hungary Department of Biophysics and Cell Biology Faculty of Medicine University of Debrecen 4012 Debrecen Hungary

In this study, the possibility of preparation and application of highly porous silica aerogel-based bioactive materials are presented. The aerogel was combined with hydroxyapatite and *** phosphate as bioactive and osteoinductive agents. The porosity of aerogels was in themesoporous region with a maximum pore diameter of 7,4 and 12.7 nm for the composite materials. The newly developed bioactive materials were characterized by scant electron microscopy. The in vitro biological effect of these modified surfaces was also tested on SAOS-2 osteogenic sarcoma cells by confocal laser scanning microscopy.

关键词： aerogel sol-gel technique bioactive matedal SAOS-2 cell

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Updates on the pathologic diagnosis and classification of mesothelioma

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Journal of Cancer Metastasis and Treatment 2022年第1期8卷 197-209页

作者： Julia R.farkas Mark Sharobim Jefree J.Schulte Department of Pathology and Laboratory Medicine University of WisconsinMadisonWI 53792USA

Mesothelioma is a rare malignant tumor of the serosal membranes that can be challenging to diagnose,especially on small biopsy *** are updated guidelines on the diagnosis and classification of mesothelioma,which incorporate advancements in understanding mesothelioma biology published in the literature over recent *** review will discuss marked developments and/or improvements that have been made,including:(1)to the histologic classifications of mesothelioma;(2)the use of such classifications and nuclear grading in prognosis;(3)the indispensability of ancillary studies in the diagnosis of mesothelioma;(4)the application of these pleural based classifications and diagnostic schemes in peritoneal mesothelioma;and(5)the potential for diagnosis of mesothelioma in situ.

关键词： Mesothelioma BRCA associated peptide 1(BAP1) methylthioadenosine phosphorylase(MTAP) nuclear grading mesothelioma in situ

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Emerging roles of circular RNAs in retinal diseases

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Neural Regeneration Research 2022年第9期17卷 1875-1880页

作者： Aneliya Hanineva Karen Sophia Park Joshua J.Wang Margaret M.DeAngelis Michael H.farkas Sarah X.Zhang Department of Ophthalmology and Ross Eye Institute Jacobs School of Medicine and Biomedical SciencesUniversity at BuffaloState University of New YorkBuffaloNYUSA Research Service Veterans Administration Western New York Healthcare SystemBuffaloNYUSA Department of Biochemistry Jacobs School of Medicine and Biomedical SciencesUniversity at BuffaloState University of New YorkBuffaloNYUSA

Retinal disorders are a group of ocular diseases whose onset is associated with a number of aberrant molecular and cellular processes or physical damages that affect retinal structure and function resulting in neural and vascular degeneration in the *** research has primarily focused on delaying retinal disease with minimal success in preventing or reversing neuronal *** this review,we explore a relatively new field of research involving circular RNAs,whose potential roles as biomarkers and mediators of retinal disease pathogenesis have only just *** knowledge of circular RNAs function is limited given its novelty,current evidence has highlighted their roles as modulators of microRNAs,regulators of gene transcription,and biomarkers of disease development and ***,we summarize how circular RNAs may be implicated in the pathogenesis of common retinal diseases including diabetic retinopathy,glaucoma,proliferative vitreoretinopathy,and age-related macular ***,we explore the potential of circular RNAs as novel biomarkers and therapeutic targets for the diagnosis and treatment of retinal diseases.

关键词： age-related macular degeneration circular RNA diabetic retinopathy glaucoma microRNA proliferative vitreoretinopathy retina

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Shear banding-inducedslip enables unprecedented strength-ductility combination of laminated metallic composites

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Journal of Materials Science & Technology 2022年第15期110卷 260-268页

作者： Shuang Jiang Ru Lin Peng Kristián Máthis Hai-Le Yan Gergely farkas Zoltán Hegedues Ulrich Lienert Johan Moverare Xiang Zhao Liang Zuo Nan Jia Yan-Dong Wang Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China Division of Engineering Materials Department of Management and EngineeringLinköping UniversityLinköping 58183Sweden Department of Physics of Materials Faculty of Mathematics and PhysicsCharles UniversityKe Karlovu 5Prague 12116Czech Republic Nuclear Physics Institute of the Czech Academy of Sciences Rež130Husinec-ˇRež25068Czech Republic Deutsches Elektronen-Synchrotron(DESY) Notkestr.85Hamburg 22607Germany Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China

Shear bands in metallic materials have been reported to be catastrophic because they normally lead to non-uniform plastic deformation. Ductility of laminated metallic composites deteriorates with increasing processing strain, particularly for those having hexagonal-close-packed(hcp) constituents due to inadequate slip systems and consequently prominent shear banding. Here, we propose a design strategy that counterintuitively tolerates the bands with localized strains, i.e. the shear banded laminar(SBL) structure, which promotes dislocation activation in hcp metals and renders unprecedented strengthductility combination in hcp-metal-based composites fabricated by accumulative roll bonding(ARB). The SBL structure is characterized with one soft hcp metal constrained by adjacent hard metal in which dislocations have been accumulated near the bimetal interfaces. High-energy X-ray diffraction astonishingly reveals that more than 90% of dislocations are non-basal in Ti layers of the SBL Ti/Nb composite processed by eight ARB cycles. Moreover, dislocations occupy a high fraction of ~30%, promoting further cross slip. The unique stress field tailored by both shear banding and heterophase interface-mediated deformation accommodation triggers important slip. This SBL design is of significance for developing hcp-based laminates and other heterostructured materials with high performances.

关键词： Shear band Laminated metallic composites Ductility High-energy X-ray diffraction Dislocation slip

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Network meta-analysis of randomized controlled trials on esophagectomies in esophageal cancer:The superiority of minimally invasive surgery

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World Journal of Gastroenterology 2022年第30期28卷 4201-4210页

作者： Lajos Szakó Dávid Németh Nelli farkas Szabolcs Kiss Réka Zsuzsa Domotor Marie Anne Engh Péter Hegyi Balint Eross András Papp Institute of Translational Medicine University of PécsMedical SchoolPécs 7624Hungary János Szentágothai Research Centre University of PécsMedical SchoolPécs 7624Hungary Institute for Translational Medicine University of PécsMedical SchoolPécs 7624Hungary of Bioanalysis University of PécsMedical SchoolPécs 7624Hungary Insittute of Translational Medicine University of PécsMedical SchoolPécs 7624Hungary Doctoral School of Clinical Medicine University of SzegedMedical SchoolSzeged 6720Hungary First Department of Medicine University of SzegedMedical SchoolSzeged 6725Hungary Institute of Translational Medicine University of PecsMedical SchoolPecs 7624Hungary Department of Surgery Clinical CenterUniversity of PécsMedical SchoolPécs 7624Hungary

BACKGROUND Previous meta-analyses,with many limitations,have described the beneficial nature of minimal invasive *** To compare all modalities of esophagectomies to each other from the results of randomized controlled trials(RCTs)in a network meta-analysis(NMA).METHODS We conducted a systematic search of the MEDLINE,EMBASE,Reference Citation Analysis(https://***/)and CENTRAL databases to identify RCTs according to the following population,intervention,control,outcome(commonly known as PICO):P:Patients with resectable esophageal cancer;I/C:Transthoracic,transhiatal,minimally invasive(thoracolaparoscopic),hybrid,and robot-assisted esophagectomy;O:Survival,total adverse events,adverse events in subgroups,length of hospital stay,and blood *** used the Bayesian approach and the random effects *** presented the geometry of the network,results with probabilistic statements,estimated intervention effects and their 95% confidence interval(CI),and the surface under the cumulative ranking curve to rank the *** We included 11 studies in our *** found a significant difference in postoperative pulmonary infection,which favored the minimally invasive intervention compared to transthoracic surgery(risk ratio 0.49;95%CI:0.23 to 0.99).The operation time was significantly shorter for the transhiatal approach compared to transthoracic surgery(mean difference-85 min;95%CI:-150 to-29),hybrid intervention(mean difference-98 min;95%CI:-190 to-9.4),minimally invasive technique(mean difference-130 min;95%CI:-210 to-50),and robot-assisted esophagectomy(mean difference-150 min;95%CI:-240 to-53).Other comparisons did not yield significant *** Based on our results,the implication of minimally invasive esophagectomy should be favored.

关键词： Surgery Esophageal cancer Esophagectomy Network meta-analysis Minimally invasive Laparoscopy

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Winter is coming:care of the febrile children in the time of COVID-19

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World Journal of Pediatrics 2021年第1期17卷 6-7页

作者： Nicole Gerber Jonathan S.farkas Adam J.Ratner Weill Cornell Medical Center New York Presbyterian525 East 68th StreetM-131New YorkNY 10021USA Department of Emergency Medicine Division of Pediatric Emergency Medicine525 East 68th StreetM130New YorkNY 10021USA New York University Langone Health/Bellevue Hospital Center 462 First AveNew YorkNY 10016USA

In the pediatric emergency department(PED),winter seems to arrive earlier each *** the broken bones and lac-erations of the summer,the winter season brings fevers and respiratory *** is our bread and butter-it is the most common reason for PED visits[1].Fever phobia is ingrained in our society[2].In the pre-vaccine era,a febrile child was cause for concern;those who were ill-appearing had high rates of bacterial meningitis,and even well-appear-ing children could not be rapidly *** bac-teremia was a common condition in well-appearing young febrile children and frequently required laboratory evalua-tion and treatment with empiric antibiotics[3].

关键词： febrile winter children

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