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Utilizing neural networks to supplant chemical kinetics tabulation through mass conservation and weighting of species depletion

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Energy and AI 2024年第2期16卷 101-110页

作者： Franz m.Rohrhofer Stefan Posch Clemens Gößnitzer Josém.García-oliver Bernhard C.Geiger Know-Center GmbH Sandgasse 36Graz8010StyriaAustria LEC GmbH Inffeldgasse 19Graz8010StyriaAustria Universitat Politècnica de València Camíde VeraValència46022ValènciaSpain

Artificial Neural Networks(ANNs)have emerged as a powerful tool in combustion simulations to replace memory-intensive tabulation of integrated chemical *** reaction mechanisms,however,present a challenge for standard ANN approaches as modeling multiple species typically suffers from inaccurate predictions on minor *** paper presents a novel ANN approach which can be applied on complex reaction mechanisms in tabular data form,and only involves training a single ANN for a complete reaction *** approach incorporates a network architecture that automatically conserves mass and employs a particular loss weighting based on species *** modifications are used to improve the overall ANN performance and individual prediction accuracies,especially for minor species mass *** validate its effectiveness,the approach is compared to standard ANNs in terms of performance and ANN *** distinct reaction mechanisms(H_(2),C_(7)H_(16),C_(12)H_(26),OmE_(34))are used as a test cases,and results demonstrate that considerable improvements can be achieved by applying both modifications.

关键词： Neural network approach Chemical kinetics Flamelet tabulation mass conservation Species loss weighting

Root overlap and allocation of above- and belowground growth of European beech in pure and mixed stands of Douglas fir and Norway spruce

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Forest Ecosystems 2024年第5期11卷 591-602页

作者： Amani S.Lwila Christian Ammer oliver Gailing Ludger Leinemann martina mun Department of Silviculture&Forest Ecology of the Temperate Zones University of GöttingenBüsgenweg 137077GöttingenGermany Center for Biodiversity and Sustainable Land-Use University of GöttingenBüsgenweg 137077GöttingenGermany Department of Forest Genetics and Forest Tree Breeding Faculty of Forest Sciences and Forest EcologyUniversity of GöttingenBüsgenweg 237077GöttingenGermany Forestry Research and Competence Centre Gotha Jägerstraße 1D-99867Germany

Site conditions and species identity have a combined effect on fine root growth of trees in pure and mixed ***,mechanisms that may contribute to this effect are rarely studied,even though they are essential to assess the potential of species to cope with climate *** study examined fine root overlap and the linkage between fine root and stem growth of European beech(Fagus sylvatica)growing in pure and mixed stands with Douglas fir(Pseudotsuga menziesii)or Norway spruce(Picea abies)at two different study sites in northwestern *** study sites represented substantially different soil and climate *** each site,three stands,and at each stand,three pairs of trees were *** the pure beech stand,the pairs consisted of two beech trees,while in the mixed stands each pair was composed of a beech tree and a *** each pair,three evenly spaced soil cores were taken monthly throughout the growing *** the pure beech stands,microsatellite markers were used to assign the fine roots to individual *** in stem diameter of beech were quantified and then upscaled to aboveground wood productivity with automatic high-resolution circumference *** found that fine root overlap between neighboring trees varied independently of the distance between the paired trees or the stand types(pure versus mixed stands),indicating that there was no territorial *** wood productivity(wood NPP)and fine root productivity(root NPP)showed similar unimodal seasonal patterns,peaking in ***,this pattern was more distinct for root NPP,and root NPP started earlier and lasted longer than wood *** influence of site conditions on the variation in wood and root NPP of beech was stronger than that of stand *** NPP was,as expected,higher at the richer site than at the poorer *** contrast,root NPP was higher at the poorer than at the richer *** concluded that beech can respond to limited resources

关键词： Fine root growth Stem growth Trade-off Cost-benefit ratio Belowground territoriality Conspecific neighbors Heterospecific neighbors

A hybrid solar-biogas system for post-COVID-19 rural energy access

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Clean Energy 2024年第1期8卷 84-99页

作者： Ochuko K.Overen KeChrist Obileke Edson L meyer Golden makaka oliver O.Apeh Fort Hare Institute of Technology University of Fort HarePrivate Bag X1314Alice 5700South Africa Department of Physics Renewable Energy Research CentreUniversity of Fort HarePrivate Bag X1314Alice 5700South Africa Department of Electrical and Electronic Engineering Science Faculty of Engineering and Build EnvironmentUniversity of JohannesburgAuckland Park 2006South Africa

Solar home systems for rural electrification are often designed with a limited energy supply,which presents a drawback for the ***,uncontrolled livestock faeces in rural communities constitute environmental sanitation and health *** excrement can be used through a biogas digester to supplement solar energy to provide adequate and sustainable elec-tricity access to underserved rural communities while achieving waste ***,this study presents a hybrid solar-biogas system for a more dynamic energy supply and waste management for post-Covid recovery plans in rural communities.A parametric research approach that involves the use of the Integrated Environment Solution Virtual Environment software application and mathematical models to design the desired household load and the hybrid system sizing is used in the *** findings show that the daily household energy consumption was 6.6 kWh,equivalent to 206.40 kWh/month.A 1.2-kWp and 1.2-m^(3)hybrid solar-biogas system was found to adequately power the ***,the total initial investment cost of the system was$5777.20 with a net present value of$6566.78,net profit of$4443.6,a payback period of 14 years and 8 months,and a levelized cost of energy of$0.21/kWh;these include a 60%initial investment and maintenance costs *** performance contracting and energy-as-a-service were recommended to effectively run and operate the *** study successfully revealed the design,specifications and upscaling mechanism of the proposed hybrid solar-biogas *** research is required to unveil the efficacy of the system,the performance gap and the perception of the technology by the beneficiaries.

关键词： energy access sustainable rural development clean energy waste management post-COVID-19 recovery plan

Delayed postpancreatectomy hemorrhage as the role of endovascular approach:Four case reports

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World Journal of Clinical Cases 2024年第31期12卷 6462-6471页

作者： Igor Petrovic Ivan Romic Ana m Alduk Nino Ticinovic oliver m Koltay Klara Brekalo Ante Bogut Department of Hepatobiliary Surgery and Transplantation University Hospital Center ZagrebZagreb 10000Croatia Department of Surgery University Hospital Centre ZagrebZagreb 10000Croatia Department of Radiology University of Zagreb School of MedicineUniversity Hospital Center ZagrebZagreb 10000Croatia Department of Radiology University Hospital Centre ZagrebZagreb 10000Croatia Department of medical School University of ZagrebZagreb 10000Croatia Department of Internal medicine Clinic with Dialysis Center University Clinical Hospital MostarMostar 88000Bosnia and Herzegovina

BACKGROUND Pancreatic resection is still associated with high morbidity rates and delayed postpancreatectomy hemorrhage(PPH)is the most feared complication as it may lead to hemorrhagic shock or serious septic ***,endovascular approach represent safe and efficient method for minimally invasive management of extraluminal *** SUmmARY We describe four patients whose postoperative recovery after pancreatic resection was complicated by postoperative pancreatic fistula(POPF)and visceral artery *** all cases endovascular approach was utilized and it resulted in satisfactory *** discuss modern diagnostic and therapeutic approach in this clinical *** PPH is relatively uncommon,but it is a leading cause of surgical mortality after pancreatic *** monitoring and meticulous follow-up are required for all patients post-operatively,especially in the case of confirmed POPF,which is the most significant risk factor for the development of a *** as a diagnostic and therapeutic method may be an optimal first-line treatment for the management of delayed *** our experience,endovascular treatment for hemorrhagic complications of pancreatic resections has shown satisfactory results.

关键词： Pancreas Resection Hemorrhage Angiography Embolization Surgery Case report

How aromatic dissolved organic matter differs in competitiveness against organic micropollutant adsorption

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Environmental Science and Ecotechnology 2024年第5期21卷 92-102页

作者： Qi Wang oliver JLechtenfeld Luuk CRietveld Jonas Schuster mathias Ernst Roberta Hofman-Caris Jan Kaesler Chunmiao Wang min Yang Jianwei Yu Frederik Zietzschmann Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of Sciences100085BeijingChina Delft University of Technology Department of Water ManagementPO Box 50482600GADelftthe Netherlands Department of Analytical Chemistry Research Group BioGeoOmicsHelmholtz Centre for Environmental ResearchUFZPermoserstr.1504318LeipzigGermany Berliner Wasserbetriebe LaboratoryMotardstr.3513629BerlinGermany Institute for Water Resources and Water Supply Hamburg University of TechnologyAm Schwarzenberg-Campus 321073HamburgGermany KWR Watercycle Research Institute 3433PENieuwegeinthe Netherlands ProVISCentre for Chemical microscopy Helmholtz Centre for Environmental ResearchUFZPermoserstr.1504318LeipzigGermany Wageningen University and Research Department of Environmental TechnologyBornse Weilanden 96708 WGWageningenthe Netherlands University of Chinese Academy of Sciences 100049BeijingChina

Activated carbon is employed for the adsorption of organic micropollutants(OmPs)from water,typically present in concentrations ranging from ng L1 to mg L***,the efficacy of OmP removal is considerably deteriorated due to competitive adsorption from background dissolved organic matter(DOm),present at substantially higher concentrations in mg L*** the characteristics of competitive DOm is crucial in predicting OmP adsorption efficiencies across diverse natural *** weight(mW),aromaticity,and polarity influence DOm *** the aromaticity-related metrics,such as UV254,of low mW DOm were proposed to correlate with DOm competitiveness,the method suffers from limitations in understanding the interplay of polarity and aromaticity in determining DOm ***,we elucidate the intricate influence of aromaticity and polarity in low mW DOm competition,spanning from a fraction level to a compound level,by employing direct sample injection liquid chromatography coupled with ultrahigh-resolution Fouriertransform ion cyclotron resonance mass *** exchange resin pre-treatment eliminated 93%of UV254-active DOm,predominantly aromatic and polar DOm,and only minimally alleviated DOm *** characterization revealed that nonpolar molecular formulas(constituting 26%PAC-adsorbable DOm)with medium aromaticity contributed more to the DOm *** analysis indicated that the competitiveness of highly aromatic LmW DOm compounds was strongly counterbalanced by increased *** aromaticity-derived p-p interaction cannot facilitate the competitive adsorption of hydrophilic DOm *** results underscore the constraints of depending solely on aromaticity-based approaches as the exclusive interpretive measure for DOm *** a broader context,this study demonstrates an effect-oriented DOm analysis,elucidating counterbalancing interactions of DOm molecular properties

关键词： Activated carbon Organic micropollutants Dissolved organic matter(DOm) multi-component adsorption Fourier-transform ion cyclotron resonance mass spectrometry(FT-ICR-mS)

Photometric and Spectroscopic Study of Ten Low mass Ratio Contact Binary Systems:Orbital Stability,O'Connell Effect and Infrared Calcium Line Filling

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Research in Astronomy and Astrophysics 2024年第8期24卷 212-222页

作者： Surjit S.Wadhwa Adam Popowicz Raúl michel Petar Kostić oliver Vince Nick F.H.Tothill Ain Y.De Horta miroslav D.Filipović School of Science Western Sydney UniversityLocked Bag 1797PenrithNSW 2751Australia Department of Electronics Electrical Engineering and MicroelectronicsSilesian University of TechnologyAkademicka 1644120 GliwicePoland Instituto de Astronomía UNAM.A.P.87722800 EnsenadaBCMéxico Astronomical Observatory Volgina 711060 BelgradeSerbia

Low mass ratio contact binary systems are more likely to have unstable orbits and potentially *** addition,such systems exhibit characteristics such as starspots and high energy emissions(UV)suggestive of chromospheric and magnetic *** curve modeling of ten contact binary systems is *** were found to be of extreme low mass ratio ranging from 0.122 to 0.24 and three were found to be potentially unstable and possible merger *** of the infrared calcium absorption lines is a marker of increased chromospheric *** use the available Large Sky Area multi-Object Fiber Spectroscopic Telescope spectra along with matched standard spectra(broadened for rotation)to measure the excess filling of the central core depression flux of the two main infrared calcium absorption linesλ8542 andλ*** find that all reported contact binaries have excess filling of the core flux in the infrared calcium *** of the systems reported were also observed by the Galaxy Evolution Explorer mission and we find that all three have features of excess ultraviolet emissions further adding evidence for increased chromospheric activity in low mass ratio contact *** of both orbital stability and absorption line filling is dependent on the determination of geometric and absolute parameters from light curve *** an insignificant number of contact binary light curves exhibit the O’Connell effect,usually attributed to *** discuss the inclusion of starspots in light curve solutions and how they influence the geometric and absolute parameters.

关键词： (stars)binaries eclipsing-techniques photometric-stars chromospheres

Interindividual Age-Independent Differences in Human CX43 Impact Ventricular Arrhythmic Risk

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Research 2024年第3期6卷 417-432页

作者： Laura García-mendívil maría Pérez-Zabalza Antoni oliver-Gelabert Josémaría Vallejo-Gil Javier Fañanás-mastral manuel Vázquez-Sancho Javier AndréBellido-morales Alexánder Sebastián Vaca-Núñez Carlos Ballester-Cuenca Emiliano Diez Laura Ordovás Esther Pueyo Biomedical Signal Interpretation and Computational Simulation group(BSICoS) Aragón Institute of Engineering ResearchUniversity of ZaragozaZaragoza 50018Spain BSICoS Instituto de Investigación Sanitaria Aragón(IISA)Zaragoza 50018Spain Centro Universitario de la Defensa(CUD) Zaragoza 50090Spain. Department of Cardiovascular Surgery University Hospital Miguel ServetZaragoza 50009Spain. Institute of Experimental medicine and Biology of Cuyo(ImBECU) CONICETMendoza 5500Argentina. Fundación Agencia Aragonesa para la Investigación y el Desarrollo(ARAID) Zaragoza 50018Spain. Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine(CIBER-BBN)Zaragoza 50018Spain.

Connexin 43 (CX43) is one of the major components of gap junctions, the structures responsible for the intercellular communication and transmission of the electrical impulse in the left ventricle. There is limited information on the histological changes of CX43 with age and their effect on electrophysiology, especially in humans. Here, we analyzed left ventricular biopsies from living donors starting at midlife to characterize age-related CX43 remodeling. We assessed its quantity, degree of lateralization, and spatial heterogeneity together with fibrotic deposition. We observed no significant age-related remodeling of CX43. Only spatial heterogeneity increased slightly with age, and this increase was better explained by biological age than by chronological age. Importantly, we found that CX43 features varied considerably among individuals in our population with no relevant relationship to age or fibrosis content, in contrast to animal species. We used our experimental results to feed computational models of human ventricular electrophysiology and to assess the effects of interindividual differences in specific features of CX43 and fibrosis on conduction velocity, action potential duration, and arrhythmogenicity. We found that larger amounts of fibrosis were associated with the highest arrhythmic risk, with this risk being increased when fibrosis deposition was combined with a reduction in CX43 amount and/or with an increase in CX43 spatial heterogeneity. These mechanisms underlying high arrhythmic risk in some individuals were not associated with age in our study population. In conclusion, our data rule out CX43 remodeling as an age-related arrhythmic substrate in the population beyond midlife, but highlight its potential as a proarrhythmic factor at the individual level, especially when combined with increased fibrosis.

关键词： CX43 rhythm Independent

Exercise training improves long-term memory in obese mice

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Life metabolism 2024年第1期3卷 37-50页

作者： oliver K.Fuller Casey L.Egan Tina L.Robinson Nimna Perera Heidy K.Latchman Lauren V.Terry Emma D.mcLennan Carolina Chavez Emma L.Burrows John W.Scott Robyn m.murphy Henriette van Praag martin Whitham mark A.Febbraio monash Institute of Pharmaceutical Sciences Monash UniversityMelbourneVictoria3052Australia La Trobe Institute for molecular Science La Trobe UniversityMelbourneVictoria3086Australia Florey Institute of Neuroscience and mental Health University of MelbourneMelbourneVictoria3052Australia Department of Biomedical Sciences Charles E.Schmidt College of Medicineand Stiles-Nicholson Brain InstituteFlorida Atlantic UniversityJupiterFL 33458United States College of Life and Environmental Sciences University of BirminghamEdgbastonBirmingham B152TTUnited Kingdom

Obesity has been linked to a range of pathologies,including *** contrast,regular physical activity is associated with the prevention or reduced progression of ***,physical activity can improve memory and spatial cognition,reduce age-related cognitive decline,and preserve brain volume,but the mechanisms are not fully ***,we investigated whether any detrimental effects of high-fat diet(HFD)-induced obesity on cognition,motor behavior,adult hippocampal neurogenesis,and brain-derived neurotrophic factor(BDNF)could be mitigated by voluntary exercise training in male C57Bl/6 ***-induced impairment of motor function was not reversed by ***,voluntary wheel running improved long-term memory and increased hippocampal neurogenesis,suggesting that regular physical activity may prevent cognitive decline in obesity.

关键词： obesity exercise cognition

Implementation of a New Solution for the Preservation of Anatomical Specimens made of Non-Toxic Substances

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Open Journal of Veterinary medicine 2024年第3期14卷 56-67页

作者： ma Reyes Pichardo-molinero Samantha Jardon-Xicotencatl misael R. oliver-González Carlos G. García-Tovar Laboratorio de Apoyo Técnico a la Anatomía Facultad de Estudios Superiores Cuautitlán Universidad Nacional Autónoma de México Estado de México Mexico Unidad de Investigación multidisciplinaria L4 (morfología Veterinaria y Biología Celular) Facultad de Estudios Superiores Cuautitlán Universidad Nacional Autónoma de México Estado de México Mexico

The preservation of anatomical pieces in Veterinary Anatomy is essential since it is not possible to dissect all domestic species. most techniques use reagents with high levels of toxicity such as formaldehyde. The objective of this work was to develop a new preservation technique that uses reagents with zero toxicity and that allows obtaining preserved pieces suitable for anatomical studies. The alcohol propylene glycol technique was developed, the method of which uses a fixation step with alcohol, sodium chloride, commercial vinegar and subsequently the impregnation of the preservation solution made from propylene glycol and commercial vinegar, which are non-toxic. As a result of this work, adequately preserved sheep hearts were obtained that preserved their morphology with slight changes in size and weight, which did not affect their external and internal anatomical structure. Its coloration was not substantially affected, remaining a little lighter. The pieces obtained showed flexibility which allowed dissections to be carried out. The time to develop the technique was 20 days. A comparative study was carried out with the phenolated glycerin technique that uses toxic reagents (formaldehyde and phenol) and the pieces obtained with the alcohol propylene glycol technique were of better quality, observing that the pieces with phenolated glycerin tend to darken and are more rigid. And the time to develop the technique is 24 days. In conclusion, a preservation technique for anatomical pieces was developed that allowed the preservation of the organs under study, which allow their use for anatomical studies, and which have been preserved without changes until the time of this publication (8 months) and there are pieces preserved with this technique for 2 years.

关键词： Veterinary Anatomy Heart Preservation Techniques Alcohol Propylene Glycol Technique Fixation Necropsy Toxic Chemicals