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Artificial Intelligence in Geosciences 2023年第1期4卷 111-118页

作者： cristina E.Dumdumaya Jonathan Salar Cabrera College of Information and Computing University of Southeastern PhilippinesBrgy.ObreroDavao CityPhilippines Faculty of Computing Data SciencesEngineering and TechnologyDavao Oriental State UniversityMati CityDavao Oriental8200Philippines

Land use and land cover(LULC)changes refer to alterations in land use or physical *** changes can be caused by human activities,such as urbanization,agriculture,and resource extraction,as well as natural phenomena,for example,erosion and climate *** changes significantly impact ecosystem services,biodiversity,and human *** this study,LULC changes in Davao City,Philippines,were simulated,predicted,and projected using a multilayer perception artificial neural network(MLP-ANN)*** MLP-ANN model was employed to analyze the impact of elevation and proximity to road networks(i.e.,exploratory maps)on changes in LULC from 2017 to *** predicted 2021 LULC map shows a high correlation to the actual LULC map of 2021,with a kappa index of 0.91 and a 96.68%*** MLP-ANN model was applied to project LULC changes in the future(i.e.,2030 and 2050).The results suggest that in 2030,the built-up area and trees are increasing by 4.50%and 2.31%,***,water will decrease by up to 0.34%,and crops is about to decrease by approximately 3.25%.In the year 2050,the built-up area will continue to increase to 6.89%,while water and crops will decrease by 0.53%and 3.32%,***,the results show that anthropogenic activities influence the land’s ***,the study illustrates how machine learning models can generate a reliable future scenario of land usage changes.

关键词： LULC Artificial neural network Remote sensing Land use land cover prediction Multilayer perception Philippines

Antiglycative activity of sulforaphane: a new avenue to counteract neurodegeneration?

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Neural Regeneration Research 2015年第11期10卷 1750-1751页

作者： cristina Angeloni Marco Malaguti Silvana Hrelia Department for Life Quality Studies Alma Mater StudiorumUniversity of Bologna

Neurodegeneration is a key aspect of a large number of diseases that come under the umbrella of＂neurodegenerative diseases＂with the most notable being Parkinson＇s,Alzheimer＇s,and Huntington＇s diseases（AD,PD,HD）.They are all incurable and debilitating conditions that result in progressive degeneration and/or death of neurons and are the leading cause of disability in the elderly. The incidence of these diseases is on the rise and yet there is a paucity of effective therapies to treat them.

关键词： Antiglycative activity of sulforaphane

High-Order Symplectic Schemes for Stochastic Hamiltonian Systems

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Communications in Computational Physics 2014年第6期16卷 169-200页

作者： Jian Deng cristina Anton Yau Shu Wong Department of Mathematical and Statistical Sciences University of AlbertaEdmontonAB T6G 2G1Canada. Department of Mathematics and Statistics Grant MacEwan UniversityEdmontonAB T5J 4S2Canada.

The construction of symplectic numerical schemes for stochastic Hamiltonian systems is *** approach based on generating functions method is proposed to generate the stochastic symplectic integration of any desired *** general the proposed symplectic schemes are fully implicit,and they become computationally expensive for mean square orders greater than ***,for stochastic Hamiltonian systems preserving Hamiltonian functions,the high-order symplectic methods have simpler forms than the explicit Taylor expansion schemes.A theoretical analysis of the convergence and numerical simulations are reported for several symplectic *** numerical case studies confirm that the symplectic methods are efficient computational tools for long-term simulations.

关键词： Stochastic Hamiltonian systems symplectic integration mean-square convergence high-order schemes.

Individualized hepatocellular carcinoma risk: The challenges for designing successful chemoprevention strategies

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World Journal of Gastroenterology 2013年第9期19卷 1359-1371页

作者： cristina Della Corte Alessio Aghemo Massimo Colombo AM Migliavacca Center for Liver Diseases First Division of Gastroenterology Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Università degli Studi di Milano 20122 Milan Italy

Hepatocellular carcinoma (HCC) develops in the context of environmental risk factors like chronic viral hepatitis, diabetes and alcohol exposure, often associated to an increased risk of cirrhosis. Antiviral treatments that are effective to counteract hepatitis B and C may also attenuate the risk of tumor development. However, since hepatitis B-related carcinogenesis is promoted independently of the onset of cirrhosis, such antiviral treatments as nucleo(t)side analogs can promote regression of cirrhosis, prevent clinical decompensation and variceal bleeding but not HCC. This means that in successfully treated patients with cirrhosis, HCC is often the consequence of their extended survival. In hepatitis C patients, a sustained virological response to interferon-based therapies can reduce the rate of HCC development, even in patients with cirrhosis who experience histological regression of their liver disease. Future therapies aimed at this endpoint in at risk populations should take into consideration pretreatment patient stratification for host, viral and environmental risk factors. In this context the recent discovery of single nucleotide polymorphisms involved in the immune system function and tumorigenesis, might permit enrollment of populations of patients enriched with HCC risk factors for targeted chemopreventive therapies. This could finally pave the way to personalized algorithms, as already seen in the diagnosis and treatment schemes for chemoprevention.

关键词： Hepatocellular carcinoma Hepatitis C virus Peginterferon Hepatitis B virus Human immunodeficiency virus Nucleoside analogues Sustained virological response Single nucleotide polymorphisms

Effect of asphalt thin beams mixed with three nominal maximum aggregate sizes in the bending beam rheometer on the prediction of thermal properties of bituminous material

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Frontiers of Structural and Civil Engineering 2017年第1期11卷 1-7页

作者： Chun-Hsing HO Maria Francisca Martinez GONZALEZ cristina Pilar Martin LINARES Department of Civil Engineering Construction Management and Environmental Engineering Northern Arizona UniversityFlagstaff Arizona 86001 USA

The objective of this research is to evaluate an impact of asphalt mixture beams with varying sizes of aggregate in the Bending Beam Rheometer （BBR） for testing/predicting thermal cracking properties of asphalt pavements. The BBR test has following benefits： the equipment is cheaper, it uses smaller specimens, faster conditioning, easier availability for quality control, easier to manage, etc. However some concerns have been raised： some consider that the size of the aggregate may affect the test＇s results; the other concern is that such small beams cannot represent the whole properties of the asphalt pavement. To address these criticisms, imaging techniques, statistical analysis, and viscoelastic modeling are used. Asphalt thin beams prepared with three different nominal maximum aggregate size （NMAS）（12.5mm, 9.5 mm, and 4.75 mm） were tested at three different temperatures （-18℃, -24℃, and -30℃）. Based on results from statistical analyses and viscoelasticity, the ratio of asphalt binders and voids and stiffness differences among the three NMAS specimens are not significant, meaning that the impact of asphalt thin beams prepared with the three NMAS on the prediction of thermal cracking is minimal and can be neglected.

关键词： bending beam rheometer thin beams thermal cracking

Effect of pier shape and pier alignment on the equilibrium scour depth at single piers

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International Journal of Sediment Research 2016年第3期31卷 244-250页

作者： cristina Fael Rui Lana António Cardoso Faculdade de Engenharia Universidade da Beira InteriorEdificio Ⅱ das EngenhariasCalcada Fonte da Lameiro Instituto Superior de Engenharia/Universidade do Algarve Instituto Superior Tecnico Universidade de Lisboa

The equilibrium scour depth at uniform single bridge piers depends on a large number of variables,including the pier horizontal cross-section shape and its alignment angle towards the flow *** influence of these variables has been studied by only a few researchers,mostly,on the basis of tests that were far from approaching *** experimental study aims at revisiting the influence of piers’ shape and alignment on local scouring for length-width ratios smaller than or equal to 4,by increasing the experimental *** five long-duration laboratory tests were run under steady,clear-water flow,close to the threshold for initiation of sediment *** pier shapes were considered:circular,rectangular square-nosed,rectangular round-nosed,oblong,and zero-spacing(packed) pile-groups;the tested skew-angles were 0°,30°,45°,60°,and 90°.It was concluded that i) the shape factor can be taken as 1.0,for rectangular round-nosed and oblong cross-section piers,and as 1.2,for rectangular squarenosed and packed pile-group cross-section piers,ii) the shape factor does not vary significantly with the duration of tests,this way confirming the robustness of the shape factors reported to date,iii) the effect of shape is present at skewed piers although the associated coefficients remain in the narrow range of1.0-1.2,and iv) for length-width ratios smaller than 4,the shape factor is of the same order of magnitude as the skew angle factor and should not be neglected.

关键词： Scour Pier shape Pier alignment

Acoustic Scattering Cross Sections of Smart Obstacles: A Case Study

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Communications in Computational Physics 2011年第8期10卷 672-694页

作者： Lorella Fatone Maria cristina Recchioni Francesco Zirilli Dipartimento di Matematica e Informatica Universitadi CamerinoVia Madonna delle Carceri 962032 Camerino(MC)Italy Dipartimento di Scienze Sociali"D.Serrani" Universit`a Politecnica delle MarchePiazza Martelli 860121 AnconaItaly CERI-Centro di Ricerca"Previsione Prevenzione e Controllo dei Rischi Geologici" Universit`a di Roma"La Sapienza"Piazza Umberto Pilozzi 900038 Valmontone(RM)Italy

Acoustic scattering cross sections of smart furtive obstacles are studied and discussed.A smart furtive obstacle is an obstacle that,when hit by an incoming field,avoids detection through the use of a pressure current acting on its boundary.A highly parallelizable algorithm for computing the acoustic scattering cross section of smart obstacles is *** a case study,this algorithm is applied to the(acoustic)scattering cross section of a"smart"(furtive)simplified version of the NASA space shuttle when hit by incoming time-harmonic plane waves,the wavelengths of which are small compared to the characteristic dimensions of the *** solution to this numerically challenging scattering problem requires the solution of systems of linear equations with many unknowns and *** to the sparsity of these systems of equations,they can be stored and solved using affordable computing resources.A cross section analysis of the simplified NASA space shuttle highlights three findings:i)the smart furtive obstacle reduces the magnitude of its cross section compared to the cross section of a corresponding"passive"obstacle;ii)several wave propagation directions fail to satisfactorily respond to the smart strategy of the obstacle;iii)satisfactory furtive effects along all directions may only be obtained by using a pressure current of considerable *** experiments and virtual reality applications can be found at the website:http://***/ceri/zirilli/w7.

关键词： Acoustic obstacle scattering smart obstacles acoustic cross section open loop control operator expansion method wavelet expansion

Methane oxidation and attenuation of sulphur compounds in landfill top cover systems: Lab-scale tests

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Journal of Environmental Sciences 2018年第3期30卷 317-326页

作者： Roberto Raga Alberto Pivato Maria cristina Lavagnolo Laura Megido Raffaello Cossu DII-Department of Industrial Engineering University of Padova Department of Chemical and Environmental Engineering Polytechnic School of Engineering Gijón Campus University of Oviedo

In this study,a top cover system is investigated as a control for emissions during the aftercare of new landfills and for old landfills where biogas energy production might not be *** materials were studied as landfill cover system in lab-scale columns：mechanical–biological pretreated municipal solid waste（MBP）;mechanical–biological pretreated biowaste（PB）;fine（PBSf）and coarse（PBSc）mechanical–biological pretreated mixtures of biowaste and sewage sludge,and natural soil（NS）.The effectiveness of these materials in removing methane and sulphur compounds from a gas stream was tested,even coupled with activated carbon *** of CO2,CH4,O2,N2,H2S and mercaptans were analysed at different depths along the *** degradation was assessed using mass balance and the results were expressed in terms of methane oxidation rate（MOR）.The highest maximum and mean MOR were observed for MBP（17.2 g CH4/m^2/hr and 10.3 g CH4/m^2/hr,respectively）.Similar values were obtained with PB and *** lowest values of MOR were obtained for NS（6.7 g CH4/m^2/hr）and PBSf（3.6 g CH4/m^2/hr）,which may be due to their low organic content and void index,*** membranes with high load capacity did not seem to have an influence on the methane oxidation process：MBP coupled with 220 g/m^2and 360 g/m^2membranes gave maximum MOR of 16.5 g CH4/m^2/hr and 17.4 g CH4/m^2/hr,*** carbon membranes proved to be very effective on H2S ***,carbonyl sulphide,ethyl mercaptan and isopropyl mercaptan seemed to be easily absorbed by the filling materials.

关键词： Emission reduction Greenhouse gas emissionLandfill Methane oxidation H2S Soil cover

Morphological variation in the short-tailed fruit bat(Carollia)in Ecuador,with comments on the practical and philosophical aspects of boundaries among species

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Integrative Zoology 2010年第3期5卷 226-240页

作者： Pablo JARRíN-V. cristina FLORES Janeth SALCEDO Yasuni Research Station School of Biological SciencesPontifical Catholic University of EcuadorQuitoEcuador Center for Ecology and Conservation Biology Department of BiologyBoston UniversityMassachusettsUSA Central University of Ecuador School of Biology and ChemistryQuitoEcuador

The mechanisms for the morphological delimitation of species in Carollia remain poorly *** is the first study to assess variation in size and shape from strictly geometric *** factors are assessed by statistical perspectives of distribution,overlap and relative *** its overlap,the size of the skull seems to be the most influential character for the discrimination of species,with shape playing a much smaller *** smallest species seems to be the most distinct in shape,not only in terms of distance among centroids in morphometric space,but also in the overall trend and direction of *** to previous studies,sexual dimorphism is not given by size but by distinct shapes of the *** such as the shape of the maxilla,previously described qualitatively as discrete with sharp boundaries,appear to be truly continuous with fuzzy borders among *** morphometric space is a gamut of continuous variation and overlap,the taxonomic error rate for size characters seems to be substantial for the medium-sized species(Carollia brevicauda Schinz,1821),with approximately 30–40%of individuals erroneously assigned to a different species after a jackknifed discriminant *** taxonomic error is higher for shape ***,systematic and ecological consequences of the observed patterns of shape and size variation are commented within the context of previously proposed arguments and hypotheses.

关键词： boundaries Carollia character state discriminant morphometrics

Distal renal tubular acidosis:genetic causes and management

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World Journal of Pediatrics 2019年第5期15卷 422-431页

作者： Sílvia Bouissou Morais Soares Luiz Alberto Wanderley de Menezes Silva Flávia cristina de Carvalho Mrad Ana cristina Simoes e Silva Interdisciplinary Laboratory of Medical Investigation Faculty of MedicineFederal University of Minas Gerais(UFMG)Av.Prof.Alfredo Balena190Room#281Belo HorizonteMG 30130-100Brazil Pediatric Nephrology Unit Faculty of MedicineUFMGBelo HorizonteBrazil

Background Distal renal tubular acidosis(dRTA)is a kidney tubulopathy that causes a state of normal anion gap metabolic acidosis due to impairment of urine *** review aims to summarize the etiology,pathophysiology,clinical findings,diagnosis and therapeutic approach of dRTA,with emphasis on genetic causes of *** sources Literature reviews and original research articles from databases,including PubMed and Google *** searching was performed to identify additional studies about *** dRTA is characterized as the dysfunction of the distal urinary acidification,leading to metabolic *** pediatric patients,the most frequent etiology of dRTA is the genetic alteration of genes responsible for the codification of distal tubule channels,whereas,in adult patients,dRTA is more commonly secondary to autoimmune diseases,use of medications and *** with dRTA exhibit failure to thrive and important laboratory alterations,which are used to define the *** oral alkali and potassium supplementation can correct the biochemical defects,improve clinical manifestations and avoid nephrolithiasis and *** dRTA is a multifactorial disease leading to several clinical *** and laboratory alterations can be corrected by alkali replacement therapy.

关键词： Renal tubular acidosis Distal tubule physiology Metabolic acidosis Gene mutations Proton pump