检索结果-南通市图书馆

On an Exact Cylindrically Symmetric Solution in a Born-Infeld Type Theory of Gravity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of High Energy Physics, Gravitation and Cosmology 2019年第3期5卷 711-718页

作者： Tiago de Oliveira rosa Maria emilia Xavier Guimarã es Joaquim Lopes Neto Instituto Federal Goiano Campus Uruta&#237 Rodovia Geraldo Silva Nascimento Uruta&#237 Brazil Instituto de Fí sica Universidade Federal Fluminense Niter&#243 i Brazil Instituto de Fí sica Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil

In this work, we derive an exact vacuum solution for a cylindrically symmetric metric in an extended gravity theory developed by Novello, de Lorenci and Luciane (hereafter referred to as the NDL theory) which is inspired in the Born-Infeld theory. The main goal of this paper is to nd a cosmic string solution for the NDL theory. However, a careful analysis of the metric shows that it is asymptotically singular and therefore does not represent a cosmic string solution.

关键词： Modi ed Theories of Gravity Topological defects

On the Jebsen-Birkhoff Theorem in a Born-Infeld Type Theory of Gravity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of High Energy Physics, Gravitation and Cosmology 2019年第4期5卷 1051-1056页

作者： Tiago de Oliveira rosa Maria emilia Xavier Guimar&atilde es Rocco Pascale Neto Joaquim Lopes Neto Instituto Federal Goiano Campus Urutaí Rodovia Geraldo Silva Nascimento Urutaí Brazil Instituto de Física Universidade Federal Fluminense Niterói Brazil Instituto de Física Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil

In this paper we work with a special theory of gravity|the Novello-Di Lorenci-Luciane (hereby called NDL theory) which extends the Feynman-deser standard theoretical-fi eld approach to General Relativity. In the so-called NDL theory, matter interacts universally with gravity in accordance with the Weak Equivalence Principle, while gravitons have a nonlinear self-interaction. Our main aim in this work is to show that, though the NDL theory does not admit a Schwarzschild solution, the Jebsen-Birkhoff theorem is still valid in this framework.

关键词： Electrostatic Trapping Bootstrap Current Mitigation Peeling-Ballooning Mode

Effect of low level laser therapy on dental pulp during orthodontic movement

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Methodology 2013年第2期3卷 19-26页

作者： ngela Domínguez rosa emilia Ballesteros Jairo Hernán Viáfara Oscar Mario Tamayo department of Orthodontics Faculty of DentistryUniversidad del ValleCali 76001000Colombia Histology and Anatomy Medicine DepartmentUniversidad Santiago de CaliCali 76001000Colombia

AIM: To validate the protocol described here to be used in future clinical trials related to the effect of laser therapy on dental pulp. METHODS: Histologically treated samples from eight human healthy premolar teeth obtained from the middle root level were distributed in four groups: group 1(G1) absolute control; group 2(G2) only laser irradiation; group 3(G3) exposed only to orthodontics; and group 4(G4) treated with orthodontics and laser. Laser treatment was performed at 830 nm wavelength, 100 mW(energy 80 J/cm2, 2.2 J), for 22 s in the vestibular surface and 22 s in the palatal surface, 1 mm away from the dental root mucosa. Three staining methods were performed: hematoxylin-eosin(HE), Masson's Trichrome method and Gomori's ***: The pulp histology parameters were evaluated and the results classified in to 3 parts: an inflammatory response, soft tissue response(dental pulp) and hard tissue response(dentin and predentin). There was no inflammation(chronic or acute) in any of the evaluated groups. The zones of pulp necrosis were found in one premolar of G3 and in one of G4; in groups G2 and G4 there was higher angiogenesis than in the other two groups. G4 group presented the highest level of vascularization. A reduced nerve density was observed in G3. A G2 specimen showed increased nerve density. A higher rate of calcification was observed in G1 compared to G2. denticles, either real or false, were observed in G1, G2 and G3. Sclerosis of dentin and focal dentin loss was observed among all the groups. Secondary dentin was present in one sample in G1 and G2. A necrosis zone was found in one sample of G3 and G4. No differences between groups were observed in the odontoblast irregularity layer but the layer was wider in the group treated with laser only. A notable difference was detected in reduction of the cell-free layer between the groups G1 and G4. The findings in pulp tissue favor its adaptative response against dental movement induced by orthodontics.

关键词： Low level laser therapy Pulpal Orthodontic movement Histological protocol dentin

Chronic hepatitis C virus infection and atherosclerosis: Clinical impact and mechanisms

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第13期20卷 3410-3417页

作者： Luigi E Adinolfi rosa Zampino Luciano Restivo Amedeo Lonardo Barbara Guerrera Aldo Marrone Fabio Nascimbeni Anna Florio Paola Loria department of Medical SurgicalNeurologicalMetabolicand Geriatric SciencesSecond University of Naples80100 NaplesItaly department of Internal Medicine EndocrinologyMetabolism and GeriatricsUniversity of Modena and Reggio Emilia41126 Modena Italy Vascular Surgery Second University of Naples80100 NaplesItaly

Hepatitis C virus(HCV)infection represents a major health issue worldwide due to its burden of chronic liver disease and extrahepatic manifestations including cardiovascular diseases,which are associated with excess *** of published studies supports the view that HCV infection should be considered a risk factor for the development of carotid atherosclerosis,heart failure and *** contrast,findings from studies addressing coronary artery disease and HCV have yielded conflicting ***,meta-analytic reviews and prospective studies are *** pathogenic mechanisms connecting HCV infection,chronic liver disease,and atherogenesis are not completely ***,it has been hypothesized that HCV may promote atherogenesis and its complications through several direct and indirect biological mechanisms involving HCV colonization and replication within arterial walls,liver steatosis and fibrosis,enhanced and imbalanced secretion of inflammatory cytokines,oxidative stress,endotoxemia,mixed cryoglobulinemia,perturbed cellular and humoral immunity,hyperhomocysteinemia,hypo-adiponectinaemia,insulin resistance,type 2 diabetes and other components of the metabolic *** these complex mechanisms is of fundamental importance for the development of novel therapeutic approaches to prevent and to treat vascular complications in patients with chronic HCV ***,it seems that HCV clearance by interferon and ribavirin treatment significantly reduces non-liver-related mortality;moreover,interferon-based treatment appears to decrease the risk of ischemic stroke.

关键词： Hepatitis C virus Atherosclerosis Coronary artery disease Stroke Inflammation

Low-Cost CSI Using Forensic GPR, 3D Reconstruction, and GIS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geographic Information System 2019年第5期11卷 493-499页

作者： Pier Matteo Barone rosa Maria Di Maggio Archaeology and Classics Program American University of Rome Rome Italy -Forensic Geoscience Italy Rome Italy AcISF-Accademia Italiana di Scienze Forensi Reggio Emilia Italy.

At a time in which several law enforcement agencies all around the world are facing severe expenditure reviews, the increasing use of low-cost solutions during crime scene investigations (CSI) can be a sustainable solution without being detracting from a scientific and rigorous forensic approach. Recently, some private companies are trying to satisfy the growing needs of the police to have cheaper and faster techniques to survey crime scenes and to obtain results with scientifically high-level outputs, more or less comparable with similar outputs from more expensive instruments. This paper reported results from a crime scene in which a low-cost GPR instrument, a free 3D photogrammetry software, and an open-source geographical information system (GIS) were deployed. The collection, processing, and analyses of these data will provide a very promising starting point for future low-cost and professional applications.

关键词： GPR CSI Forensic Geoscience 3D Reconstruction GIS

Turbo-taxonomy to assemble a megadiverse lichen genus:seventy new species of Cora(Basidiomycota:Agaricales:Hygrophoraceae),honouring David Leslie Hawksworth’s seventieth birthday

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fungal Diversity 2017年第3期84卷 139-207页

作者： Robert Lücking Manuela Dal Forno Bibiana Moncada Luis Fernando Coca Leidy Yasmín Vargas-Mendoza André Aptroot Laura Juliana Arias Betty Besal Frank Bungartz Diego Mauricio Cabrera-Amaya Marcela E.S.Cáceres José Luis Chaves Sionara Eliasaro Martha Cecilia Gutiérrez Jesús E.Hernández Marin María de los Ángeles Herrera-Campos María E.Holgado-Rojas Harald Jonitz Martin Kukwa Fabiane Lucheta Santiago Madriñán Marcelo Pinto Marcelli Suzana Maria de Azevedo Martins Joel A.Mercado-Díaz Jorge Alberto Molina Eduardo A.Morales Peter R.Nelson Freddy Nugra Francisco Ortega Telma Paredes Ayda Lucía Patiño Rouchi Nadine Peláez-Pulido rosa emilia Pérez Pérez Gary B.Perlmutter Eimy Rivas-Plata Javier Robayo Camilo Rodríguez Diego Fernando Simijaca Edier Soto-Medina Adriano Afonso Spielmann Alejandra Suárez-Corredor Jean-Marc Torres Carlos Alberto Vargas Alba Yánez-Ayabaca Gothamie Weerakoon Karina Wilk Marcela Celis Pacheco Mauricio Diazgranados Grischa Brokamp Thomas Borsch Patrick M.Gillevet Masoumeh Sikaroodi James D.Lawrey Botanical Garden and Botanical Museum Berlin KöniginLuise-Straße 6-814195 BerlinGermany Science Education The Field Museum1400 South Lake ShoreChicagoIL 60605USA department of Botany Smithsonian InstitutionNational Museum of Natural History10th St Constitution Ave NWWashingtonDC 20560USA department of Environmental Science and Policy George Mason UniversityFairfaxVA 22030-4444USA Licenciatura en Biologı´a Universidad Distrital Francisco Jose´de CaldasCra.4 No.26D-54Torre de LaboratoriosHerbarioBogota´D.C.Colombia Herbario Universidad de Caldas(FAUC) Edificio BicentenarioCalle 65No.26-10ManizalesA.A.275CaldasColombia ABL Herbarium G.v.d.Veenstraat 1073762 XK SoestThe Netherlands Biologı´a Universidad del Quindı´oCarrera 15 Calle 12 NorteArmeniaQuindı´oColombia 120 Chavis Avenue LexingtonVA 24450USA Charles Darwin Foundation Puerto AyoraSanta Cruz IslandGala´pagosEcuador Schedestraße 8 53113 BonnGermany Jardı´n Bota´nico de Bogota´Jose´Celestino Mutis Avenida Calle 63 No.68-95Bogota´D.C.Colombia departamento de Biocieˆncias Universidade Federal de SergipeAvenida Vereador Olı´mpio Grandes/n.ItabaianaCEP:49.500-000 SergipeBrazil Laboratorio de Hongos Instituto Nacional de Biodiversidad(INBio)Apdo.22-3100Santo Domingo de HerediaCosta Rica departamento de Botaˆnica Universidade Federal do Parana´Campus Polite´cnicoSetor de Cieˆncias Biolo´gicasAv.Cel.Francisco H.dos Santoss/nJardim das Ame´ricas81531-980 CuritibaPRBrazil Ingenierı´a Ambiental Universidad Distrital Francisco Jose´de CaldasCarrera 5 Este No.15-82Av.CircumvalarBogota´D.C.Colombia Instituto Experimental Jardı´n Bota´nico Dr.Tobı´as Lasser Centro de Investigacio´n y DesarrolloUniversidad Central de VenezuelaAve.Salvador AllendeJardı´n Bota´nico de CaracasApartado#2156Caracas 1010-AVenezuela departamento de Bota´nica Instituto de Biologı´aUniversidad Nacional Auto´noma de Me´xicoApartado Postal 70-36704510 Ciudad De Me´xicoMexico Facultad de Ciencias Escuela Profesional de Biologı´aUniv

Following a large-scale phylogenetic study of the lichenized genus Cora(Basidiomycota:Agaricales:Hygrophoraceae),we formally describe 70 new species,honouring the seventieth birthday of David Leslie Hawksworth,one of the preeminent figures in mycology and lichenology in the past 50 *** on an updated phylogeny using the ITS fungal barcoding locus,we now recognize 189 taxa in a genus that until recently was considered to represent a single species;including this contribution,92 of these are formally recognized,including five taxa based on historical names or collections that have not been *** of Cora can be recognized by a combination of morphological(size,colour,lobe configuration,surface hairs,hymenophore size and shape),anatomical(thallus thickness,cortex structure,photobiont type,hyphal papillae),and ecogeographical features(substrate,habitat,distribution),and a keytable allowing the identification of all accepted taxa is *** new species are:Cora accipiter Moncada,Madrin˜a´n&Lücking ***.,*** Moncada,Soto-Medina&Lücking ***.,*** Moncada,Dal Forno&Lücking ***.,*** Dal Forno,Chaves&Lücking ***.,*** Moncada,***ı´guez&Lücking ***.,*** Lücking,Moncada&*** ***.,*** Moncada,Ya´nez-Ayabaca&Lücking ***.,*** Moncada,Patin˜o&Lücking ***.,*** Lücking,***&Dal Forno ***.,*** Holgado,Rivas Plata&Perlmutter ***.,*** Dal Forno,Eliasaro&Spielmann ***.,*** Nugra,Dal Forno&Lücking ***.,*** Lücking,Martins&Lucheta ***.,*** Moncada,R.-***´rez&Lücking ***.,*** Moncada,***.&Lücking ***.,*** Moncada,CabreraAmaya&Lücking ***.,*** Moncada,R.-***´rez&***.,*** Lücking,***&Dal Forno ***.,*** Moncada,***´rez-Corredor&Lücking ***.,*** Moncada,***&Lücking ***.,***

关键词： Bolivia Citizen science Chile Mexico Puerto Rico Sri Lanka