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Advanced cement based nanocomposites reinforced with MWCNTs and CNFs

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Frontiers of Structural and Civil engineering 2016年第2期10卷 142-149页

作者： emmanuel e. GDOUTOS maria S. KONSTA-GDOUTOS Panagiotis A. DANOGLIDIS Surendra P. SHAH Department of Civil engineering Democritus University of Thrace GR 671 O0 Xanthi Greece Northwestern University Evanston IL 60208 USA

Cementitious materials reinforced with well dispersed multiwall carbon nanotubes （MWCNTs） and carbon nanofibers （CNFs） at the nanoscale were fabricated and tested. The MWCNTs and CNFs were dispersed by the application of ultrasonic energy and the use of a superplasticizer. Mechanical and fracture properties including flexural strength, Young＇s modulus, flexural and fracture toughness were measured and compared with similarly processed reference cement based mixes without the nano-reinforcement. The MWCNTs and CNFs reinforced mortars exhibited superior properties demonstrated by a significant improvement in flexural strength （106%）, Young＇s modulus （95%）, flexural toughness （105%）, effective crack length （30%） and fracture toughness （120%）.

关键词： multi-walled carbon nanotubes carbon nanofibers mortars toughness Young's modulus

Quantifying Information via Shannon entropy in Spatially Structured Optical Beams

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Research 2021年第1期2021卷 780-788页

作者： maria Solyanik-Gorgone Jiachi Ye Mario Miscuglio Andrei Afanasev Alan e.Willner Volker J.Sorger Department of electrical and Computer engineering The George Washington UniversityWashingtonDC 20052USA Department of Physics The George Washington UniversityWashingtonDC 20052USA Department of electrical engineering at University of Southern California Los AngelesCalifornia 90089USA

While information is ubiquitously generated,shared,and analyzed in a modern-day life,there is still some controversy around the ways to assess the amount and quality of information inside a noisy optical channel.A number of theoretical approaches based on,e.g.,conditional Shannon entropy and Fisher information have been developed,along with some experimental *** of these approaches are limited to a certain alphabet,while others tend to fall short when considering optical beams with a nontrivial structure,such as Hermite-Gauss,Laguerre-Gauss,and other modes with a nontrivial ***,we propose a new definition of the classical Shannon information via the Wigner distribution function,while respecting the Heisenberg *** this definition,we calculate the amount of information in Gaussian,Hermite-Gaussian,and LaguerreGaussian laser modes in juxtaposition and experimentally validate it by reconstruction of the Wigner distribution function from the intensity distribution of structured laser *** experimentally demonstrate the technique that allows to infer field structure of the laser beams in singular optics to assess the amount of contained *** the generality,this approach of defining information via analyzing the beam complexity is applicable to laser modes of any topology that can be described by well-behaved *** Shannon information,defined in this way,is detached from a particular alphabet,i.e.,communication scheme,and scales with the structural complexity of the *** a synergy between the Wigner distribution function encompassing the information in both real and reciprocal space and information being a measure of disorder can contribute into future coherent detection algorithms and remote sensing.

关键词： distribution Spatial complexity

Optimized design and integration of energy storage in Solar-Assisted Ground-Source Heat Pump systems

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Building Simulation 2023年第10期16卷 1933-1948页

作者： maria Ferrara enrico Fabrizio Department of energy Politecnico di TorinoTurin10121Italy

The integrated use of multiple renewable energy sources to increase the efficiency of heat pump systems,such as in Solar Assisted Geothermal Heat Pumps(SAGHP),may lead to significant benefits in terms of increased efficiency and overall system performance especially in extreme climate contexts,but requires careful integrated optimization of the different system *** particular,thermal storages take a fundamental role in optimizing the integration of renewable energy sources and the system *** work investigates the potential design optimization of a SAGHP system in a mountain site by exploring many different alternatives to optimize the mutual relationship between the solar field,the geothermal field and the water thermal *** is done through an original simulation-based multi-objective optimization framework considering energy efficiency and economic feasibility,which allows appraising the impact of the different design alternatives on the overall system performance and on the dynamics of the different system *** identify a set of optimized system configurations that optimize the integrated exploitation of the different thermal sources showing a potential increase of the overall system performance leading to 34%lower global cost compared to the initial *** robustness of the optimal design solutions is reported with respect to the current context of high economic uncertainty.

关键词： thermal storage geothermal energy heat pumps building simulation artificial intelligence cost optimization energy flexibility

Chemically intuited,large-scale screening of MOFs by machine learning techniques

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npj Computational Materials 2017年第1期3卷 123-129页

作者： Giorgos Borboudakis Taxiarchis Stergiannakos maria Frysali emmanuel Klontzas Ioannis Tsamardinos George e.Froudakis Department of Computer Science University of CreteVoutes CampusGR-70013 HeraklionCreteGreece Gnosis Data Analysis PC Palaiokapa 6571305 HeraklionGreece Department of Chemistry University of CreteVoutes CampusGR-70013 HeraklionCreteGreece School of Computing and engineering University of HuddersfieldQueensgateHuddersfieldHD13DHUK

A novel computational methodology for large-scale screening of MOFs is applied to gas storage with the use of machine learning *** approach is a promising trade-off between the accuracy of ab initio methods and the speed of classical approaches,strategically combined with chemical *** results demonstrate that the chemical properties of MOFs are indeed predictable(stochastically,not deterministically)using machine learning methods and automated analysis protocols,with the accuracy of predictions increasing with sample *** initial results indicate that this methodology is promising to apply not only to gas storage in MOFs but in many other material science projects.

关键词： apply stochastic learning

The ruminal bacterial community in lactating dairy cows has limited variation on a day-to-day basis

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Journal of Animal Science and Biotechnology 2019年第4期10卷 1108-1112页

作者： Joseph H.Skarlupka maria e.Kamenetsky Kelsea A.Jewell Garret Suen Department of Bacteriology University of Wisconsin-Madison5159 MSB1550 Linden DriveMadisonWI 53706USA Department of Population Health Sciences University of Wisconsin-MadisonMadison 53726USA College of Agricultural and Life Sciences Statistical Consulting Lab University of Wisconsin-MadisonMadison 53706USA Department of Biology Centralia CollegeCentraliaWA 98531USA.

Dairy cows rely on a complex ruminal microbiota to digest their host-indigestible feed. Our ability to characterize this microbiota has advanced significantly due to developments in next-generation sequencing. However, efforts to sample the rumen, which typical y involves removing digesta directly from the rumen via a cannula, intubation, or rumenocentesis, is costly and labor intensive. As a result, the majority of studies characterizing the rumen microbiota are conducted on samples col ected at a single time point. Currently, it is unknown whether there is significant day-to-day variation in the rumen microbiota, a factor that could strongly influence conclusion drawn from studies that sample at a single time point. To address this, we examined day-to-day changes in the ruminal microbiota of lactating dairy cows using next-generation sequencing to determine if single-day sampling is representative of sampling across 3 consecutive days. We sequenced single-day solid and liquid fractions of ruminal digesta col ected over 3 consecutive days from 12 cannulated dairy cows during the early, middle, and late stages of a single lactation cycle using the V4 region of the bacterial 16 S r RNA gene. We then generated 97% similarity operational taxonomic units(OTUs) from these sequences and showed that any of the individual samples from a given 3-day sampling period is equivalent to the mean OTUs determined from the combined 3-d data set. This finding was consistent for both solid and liquid fractions of the rumen,and we thus conclude that there is limited day-to-day variability in the rumen microbiota.

关键词： Bacterial community Next-generation sequencing Rumen microbiota

Groups with Supersoluble Non-normal Subgroups

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Algebra Colloquium 2016年第2期23卷 213-218页

作者： maria De Falco maria Martusciello Carmela Musella Dipartimento di Matematica e Applicazioni Universita di Napoli Federico II Complesso Universitario Monte S. Angelo Via Cintia 1-80126 Napoli Italy

The structure of groups in which many subgroups have a certain property X has been investigated for several choices of the property χ.In particular, groups whose non-normal subgroups are supersoluble are studied ia t... 详细信息

关键词： supersoluble group polycyclic group normalizer subgroup

Catagenetic type of manganese ores:Ree and isotope(δ^(13)C,δ^(18)O)geochemical features(on the example of the Usa deposit,Russia)

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Acta Geochimica 2024年第6期43卷 1133-1152页

作者： Vladimir N.Kuleshov Andrey Yu.Bychkov Irina Yu.Nikolaeva maria e.Tarnopolskaia Geological Institute Russian Academy of SciencesPyzhevskii Per.7119017 MoscowRussia Lomonosov Moscow State University Leninskie Gory1119899 MoscowRussia

Chemical(Ree and major elements)and isotope(δ^(13)C,δ^(18)O)composition of carbonate manganese ores and manganese-bearing carbonates of the Usa deposit(Siberia,Russia)were *** data on the composition of Ree exhibit both the distinct negative(Ce/Ce*_(PAAS)e(Ce/Ce*_(PAAS)>1)cerium anomalies and the positive eu-anomaly(eu/eu*_(PAAS)>1).Negative eu-anomalies are not *** contents of Mn,Fe,Ree,and Ce-anomalies show a positive correlation with each ***-anomalies and the amount of manganese and Ree in relation to the carbon isotope composition(δ^(13)C)show a negative relationship and indicate that oxidized carbon of organic matter played an important role in the concentration of manganese and Ree in manganese *** chemical and isotope composition of examined rocks indicates on secondary formation of *** major phases and sources are distinguished in the ore-forming process characterized by diff erent chemical(Ree and ore elements)and isotope composition:(i)highgrade manganese ores(with high contents of Ree and light carbon isotope composition)and(ii)low-grade manganese ores(with low contents of Ree and heavy carbon isotope composition).

关键词： Manganese ore Ree Isotope composition Catagenesis Cambrian Siberia

Pediatric non-alcoholic steatohepatitis:The first report on the ultrastructure of hepatocyte mitochondria

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World Journal of Gastroenterology 2014年第15期20卷 4335-4340页

作者： Joanna M Lotowska maria e Sobaniec-Lotowska Sylwia B Bockowska Dariusz M Lebensztejn Department of General Pathomorphology Medical University of Bialystok15269 BialystokPoland Department of Medical Pathomorphology Medical University of Bialystok15269 BialystokPoland Department of Laboratory Diagnostics Maria Sklodowska-Curie Memorial Bialystok Oncology Center15027 BialystokPoland Department of Pediatrics Gastroenterology and AllergologyMedical University of Bialystok15274 BialystokPoland

AIM: To investigate the ultrastructure of abnormal hepatocyte mitochondria, including their cellular and hepatic zonal distribution, in bioptates in pediatric non-alcoholic steatohepatitis (NASH).

关键词： Pediatric non-alcoholic steatohepatitis Hepatocyte ultrastructure Megamitochondria with crystalline inclusions Foamy cytoplasm of hepatocytes

Rare earth elements(Ree)and isotope composition(δ^(13)C andδ^(18)O)of manganese ores of Chiatura deposit(Georgia):features of ore formation and genesis

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Acta Geochimica 2023年第4期42卷 779-801页

作者： Vladimir N.Kuleshov Andrey Yu.Bychkov Irina Yu.Nikolaeva maria e.Tarnopolskaya Geological Institute Russian Academy of SciencesPyzhevskii Per.7MoscowRussia 119017 Lomonosov Moscow State University Leninskie Gory1MoscowRussia 119899

The rare earth elements(Ree)geochemistry and the isotope(δ^(13)C,δ^(18)O)composition of manganese ores of the Chiatura(Georgia)deposit were *** of the major features of all types of manganese ores is negative cerium(Ce/Ce*_(PAAS))anomaly and the absence of europium(eu/eu*_(PAAS))*** oolitic manganese ores were formed in oxic shallow marine *** content and distribution of Rees(in particular Ce and eu)in these ores are connected mainly with ferrous *** performed C-and O-isotope research in Mn-carbonates(oolitic and massive)has indicated that carbonate ores were formed by the participation of isotopic ally light CO_(2)which is a result of the oxidation of organic matter in the sediment strata by reducing environments of early diagenesis(and,partially,catagenesis)*** negative cerium anomalies in the studied carbonate ores reflect the specific Ree patterns in pore waters of sediments of earlier isdiagenesis zone of the Oligocene Chiatura's *** deficiency of cerium in this zone remains debatable and requires further *** of manganese carbonates took place multistage by the input of incisional solutions of different chemistry into sea bottom waters and *** absence of europium anomaly indicates about lack of hydrothermal solution input.

关键词： Ree Cerium anomaly Carbon and oxygen isotope geochemistry Oxide and carbonate manganese ores Chiatura deposit