检索结果-南通市图书馆

Free Cyclic Actions on Surfaces and the Borsuk-Ulam Theorem

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2022年第10期38卷 1803-1822页

作者： daciberg lima gonCalves John GUASCHI Vinicius Casteluber LAASS Departamento de Matematica IMEUniversidade de Sao PauloRua do Matao 1010 CEP:05508-090Sao Paulo-SPBrazil Normandie Univ. UNICAENCNRSLMNO14000 CaenFrance Universidade Federal da Bahia IMEDepartamento de MatematicaAv.Milton SantosS/N Ondina CEP:40170-110Salvador-BABrazil

Let M and N be topological spaces,let G be a group,and letτ:G×M→M be a proper free action of *** this paper,we define a Borsuk-Ulam-type property for homotopy classes of maps from M to N with respect to the pair(G,τ)that generalises the classical antipodal Borsuk-Ulam theorem of maps from the n-sphere S^(n) to R^(n).In the cases where M is a finite pathwise-connected CWcomplex,G is a finite,non-trivial Abelian group,τis a proper free cellular action,and N is either R^(2) or a compact surface without boundary different from S^(2) and RP^(2),we give an algebraic criterion involving braid groups to decide whether a free homotopy class β∈[M,N]has the Borsuk-Ulam *** an application of this criterion,we consider the case where M is a compact surface without boundary equipped with a free actionτof the finite cyclic group *** terms of the orient ability of the orbit space Mof M by the actionτ,the value of n modulo 4 and a certain algebraic condition involving the first homology group of M,we are able to determine if the single homotopy class of maps from M to R^(2) possesses the Borsuk-Ulam property with respect to(Z_(n),τ).Finally,we give some examples of surfaces on which the symmetric group acts,and for these cases,we obtain some partial results regarding the Borsuk-Ulam property for maps whose target is R^(2).

关键词： Borsuk-Ulam theorem cyclic groups braid groups surfaces

Percutaneous nephrostomy versus ureteral stent in hydronephrosis secondary to obstructive urolithiasis:A systematic review and meta-analysis

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Urology 2024年第2期11卷 261-270页

作者： Andreia Cardoso Aparício Coutinho gonçalo Neto Sara Anacleto Catarina Laranjo Tinoco Nuno Morais Mário Cerqueira-alves Estevão lima Paulo Mota Department of Urology Hospital de BragaBragaPortugal School of Medicine University of MinhoBragaPortugal Association(2CA-Braga).School of Medicine University of MinhoBragaPortugal

Objective: To assess if there is a preferable intervention between retrograde ureteral stent (RUS) and percutaneous nephrostomy (PCN) tube, in cases of upper urinary tract stone obstruction with complications requiring urgent drainage, by evaluating outcomes regarding urinary symptoms, quality of life (QoL), spontaneous stone passage, and length of hospital stays, since there is no literature stating the superiority of one modality over the ***: We searched MEDLINE and other sources for relevant articles in June 2019 without any date restrictions or filters applied. The selection was done first by the title and abstract screening and then by full-text assessment for eligibility. Only randomized controlled trials or cohort studies in patients with hydronephrosis secondary to obstructive urolithiasis that presented comparative data between PCN and RUS placement concerning at least one of the defined outcome measures were included. Lastly, MEDLINE database and PubMed platform were screened again using the same terms, from June 2019 until November ***: Of 556 initial articles, seven were included in this review. Most works were considered of moderate-to-high quality. Three studies regarding QoL showed a tendency against stenting, even though only one demonstrated statistically significant negative impact on overall health state. Two works reported significantly more post-intervention urinary symptoms in stenting patients. One article found that PCN is a significant predictor of spontaneous stone passage, when adjusted for stone size and location. Findings on length of hospital stays were not consistent among ***: PCN appears to be the intervention better tolerated, with less impact on the patient’s perceived QoL and less post-operative urinary symptoms, in comparison with RUS. Nevertheless, further studies with larger samples and a randomized controlled design are suggested.

关键词： Ureteral stent Percutaneous nephrostomy Obstructive urolithiasis Urinary symptoms Quality of life

Solar-driven CO_(2) conversion to methane and methanol using different nanostructured Cu_(2)O-based catalysts modified with Au nanoparticles

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 Energy Chemistry 2024年第4期91卷 287-298页

作者： João Angelo lima Perini Lilian D.Moura Torquato Juliana Fde Brito Gustavo A.Andolpho Mateus A.gonçalves Leonardo D.De Angelis Lucas D.Germano Susana I.Córdoba de Torresi Teodorico C.Ramalho Maria V.Boldrin Zanoni São Paulo State University(UNESP) Institute of ChemistryRua Prof.Francisco Degni55AraraquaraSP 14800-060Brazil National Institute of Alternative Technologies for Detection Toxicological Evaluation and Removal of Micropollutants and Radioactive Substances(INCT-DATREM)São Paulo State University(UNESP)Institute of ChemistryRua Prof.Francisco Degni55AraraquaraSP 14800-060Brazil Laboratory of Molecular Modelling Department of ChemistryNatural Sciences InstituteFederal University of LavrasLavrasMG 37200-900Brazil Department of Chemistry Faculty of ScienceUniversity of Hradec KrálovéHradec Králové50003Czech Republic Instituto de Química Universidade de São PauloAv.Prof.Lineu Prestes 74805508-080São PauloSPBrazil

This work describes the use of TiO_(2)nanotubes-based electrodes(TNT)modified with Cu_(2)O nanostructures and gold nanoparticles for the photoelectroreduction of CO_(2)to produce value-added compounds.A thin layer of polydopamine was used as both an adherent agent and an electron transfer mediator,due to itsπ-conjugated electron *** highest production yield was achieved using a TNT@PDA/Nc/Au40%electrode,with Faradaic efficiencies of 47.4%(110.5μM cm^(-2))and 27.8%(50.4μM cm^(-2))for methanol and methane,*** performance of the photoelectrodes was shown to be Cu_(2)O facet-dependent,with cubic structures leading to greater conversion of CO_(2)to methanol(43%)and methane(27%),compared to the octahedral morphology,while a higher percentage of metallic gold on the nanostructured Cu_(2)O surface was mainly important for *** functional theory(DFT)calculations supported these findings,attributing the superior photoelectrocatalytic performance of the TNT@PDA/Nc/Au40%electrode for CH4generation to the formation of an OCH3intermediate bonded to Au *** using isotope-labeling and analysis by gas chromatograph-mass(GC-MS)demonstrated that13CO_(2)was the source for photoelectrocatalytic generation of13CH3OH and13CH313CH2OH.

关键词： Cu_(2)O nanocubes Photoelectrocatalysis Polydopamine CO_(2) photoelectroreduction DFT calculations

Coincidence Wecken Property for Nilmanifolds

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2019年第2期35卷 239-244页

作者： daciberg gon?alves Peter WONG Departamento de Matemática-IME-Universidade de S?o Paulo Rua do Mat?o Department of Mathematics Bates College

Let f, g: X → Y be maps from a compact infra-nilmanifold X to a compact nilmanifold Y with dim X ≥ dim Y. In this note, we show that a certain Wecken type property holds, i.e., if the Nielsen number N(f, g) vanishes then f and g are deformable to be coincidence free. We also show that if X is a connected finite complex X and the Reidemeister coincidence number R(f, g) = ∞ then f ～ f' so that C(f', g) = {x ∈ X | f'(x) = g(x)} is empty.

关键词： Nielsen coincidence theory nilmanifolds

Nielsen Theory on 3-manifolds Covered by S^2× R

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2015年第4期31卷 615-636页

作者： daciberg gonalves Peter WONG Xue Zhi ZHAO Dept. de Matemtica-IME-USP Caixa Postal 66.281-CEP 05314-970So Paulo-SP Brasil Department of Mathematics Bates College Department of Mathematics & Institute of Mathematics and Interdisciplinary Science Capital Normal University

Let f ： M→ M be a self-map of a closed manifold M of dimension dim M ≥ 3. The Nielsen number N（f） of f is equal to the minimal number of fixed points of f＇ among all self-maps f＇ in the homotopy class of f. In this paper, we determine N（f） for all self-maps f when M is a closed 3-manifold with S^2× R geometry. The calculation of N（f） relies on the induced homomorphisms of f on the fundamental group and on the second homotopy group of M.

关键词： Lefschetz number Nielsen number 3-manifolds

COVID-19,mental health and Indigenous populations in Brazil:The epidemic beyond the pandemic

在线全文

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2022年第5期12卷 766-769页

作者： Jucier gonçalves Júnior Jucycler Ferreira Freitas Estelita lima Cândido Internal Medicine-Division of Rheumatology São Paulo UniversitySão Paulo 01246-903Brazil Post Graduate Program in Sustainable Regional Development Federal University of CaririJuazeiro do Norte 63048-080CearaBrazil

The aim of this paper was to report on factors contributing to the deterioration of the mental health of Indigenous populations(IP)in *** factors seem to have a direct impact on the mental health of IP in Brazil:(1)The absence of public policies;(2)Intellectual production;(3)Psychiatric medical care for remote areas(e.g.,telemedicine)aimed at promoting the mental health of Brazil’s IP,which causes a huge gap in the process of assistance and social,psychological,economic and cultural valorization of native peoples;(4)The dissemination of fake news,which exposed,above all,older IP to risk behaviors in the pandemic,such as refusal of vaccination;and(5)The violence carried out on IP lands due to economic interests with mining/agribusiness.

关键词： Brazil COVID-19 Indigenous population Mental health Public health

Assessment of the Anaerobic Speed Reserve during Specific High-Intensity Exercise in Judo Athletes

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 Science in Sport and Exercise 2022年第3期4卷 266-274页

作者： Emerson Franchini Rafael lima Kons Valéria Leme gonçalves Panissa Daniele Detanico Martial Arts and Combat Sports Research Group School of Physical Education and SportUniversity of São PauloSão PauloBrazil Biomechanics Laboratory Center of SportsFederal University of Santa CatarinaFlorianópolisSC 88040-900Brazil

Purpose This study aimed to describe self-selected intensity and its relationship to performance during a high-intensity all-out judo protocol,and to verify whether athletes with different anaerobic speed reserve(ASR)perform differently during a high-intensity all-out interval uchi-komi(judo-specific skill).Methods We analyzed the performance of 28 judo athletes as a whole group and divided into groups,according to their *** performed several judo-specific protocols using a specific skill:maximal speed sprint(MSS)and maximal aerobic speed(MAS),and high-intensity intermittent uchi-komi protocol(12×20 s all-out:10 s passive recovery).Results The main results demonstrated a decrease in the number of repetitions and an increase in heart rate across the *** with greater ASR performed a higher number of repetitions,compared to the low ASR group,and they were able to exercise at a higher percentage of the MAS(low ASR=126%;SD=13%;high ASR=152%,SD=l9%)and at a lower percentage of MSS compared to the low ASR group(low ASR=84%,SD=7%;high ASR=76%,SD=11%).However,both groups exercised at a similar percentage of their own ASR during the protocol(low ASR=50%,SD=20%;high ASR=53%,SD=19%).Conclusions Athletes with different ASR seem to set their pace at around 50%of their ASR within an all-out uchi-komi ***,the ASR is useful for predicting performance during high-intensity judo-specific interval exercise intervals.

关键词： Combat sports Rating of perceived exertion Pace All-out exercise

Impacts of COVID-19 on children and adolescents:A systematic review analyzing its psychiatric effects

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 Psychiatry 2022年第11期12卷 1313-1322页

作者： Italo Wanderson de Moura Gabriel Danielly gonçalves Sombra lima Jeully Pereira Pires Nélio Barreto Vieira Aloisio Antonio Gomes de Matos Brasil Yara Talita Gomes Pereira Erika Galvao de Oliveira HildsonLeandro de Menezes Nadia Nara Rolim lima Alberto Olavo Advíncula Reis Ruan Neto Pereira alves Uanderson Pereira da Silva Jucier gonçalves Junior Modesto Leite Rolim-Neto School of Medicine Faculty of Medicine of Juazeiro do Norte-FMJ/IDOMEDJuazeiro do Norte 63040-360CearaBrazil School of Medicine Federal University of CaririBarbalha 63048-080CearaBrazil Mais Médicos Program Federal Government of Brazil-Ministry of HealthIguatu 63048-080CearaBrazil Julio alves de Lira Hospital and Maternity Hospital HALHMBelo Jardim 55157-290PernambucoBrazil Nursing Department Doctor Leão Sampaio University Center-UNILEAOJuazeiro do Norte 63.041-140CearaBrazil Julio alves de Lira Hospital and Maternity Hospital JALHMBelo Jardim 55157-290PernambucoBrazil Graduate Program(Post-Doctoral)in Neuro-Psychiatry UFPERecife 50670-901PernambucoBrazil Postgraduate Program(Master’s and Doctorate)in Public Health University of São Paulo-USPSão Paulo 01246-904São PauloBrazil School of Education USPSão Paulo 05508-040São PauloBrazil Internal Medicine-Division of Rheumathology at Hospital das Clínicas São Paulo UniversitySão Paulo 01246-903São PauloBrazil

OBJECTIVE To summarize the most relevant data from a systematic review on the impact of COVID-19 on children and adolescents,particularly analyzing its psychiatric *** This review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses(PRISMA)guidelines and included experimental studies(randomized-individually or pooled-and non-randomized controlled trials),observational studies with a group for internal comparison(cohort studies-prospective and retrospective-and case-control)and qualitative studies in the period from 2021 to *** The search identified 325 articles;we removed 125 *** selected 200 manuscripts,chosen by title and selected *** excluded 50 records after screening titles and abstracts,as they did not meet the inclusion *** retrieved 150 records selected for a full *** excluded 90 text articles and we selected 25 records for the(n)***:Due to the short period of data collection,from 2021 to 2022,there is a possibility of lack of relevant studies related to the mental health care of children and *** addition,there is the possibility of publication bias,such as only significant findings being *** The impact of COVID-19 on the mental health of children and adolescents is of great concern to child and youth *** such as fear,anxiety,panic,depression,sleep and appetite disorders,as well as impairment in social interactions caused by psychic stress,are punctual markers of pain and psychic suffering,which have increasing impacts on the mental health panorama of children and adolescents globally,particularly in vulnerable and socially at-risk populations.

关键词： Child psychiatry Adolescent psychiatry Mental health COVID-19 Kids Teens

Evaluation of parasitemia by qPCR in patients with chronic Chagas disease treated with benznidazole

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2023年第12期16卷 565-572页

作者： Tycha Bianca Sabaini Pavan Eros Antônio de Almeida Rodrigo gonçalves de lima Jamiro da Silva Wanderley Luiz Cláudio Martins Sandra Cecília Botelho Costa Gláucia Elisete Barbosa Marcon Departamento de Clínica Médica Faculdade de Ciências MédicasUniversidade Estadual de Campinas(Unicamp)CampinasSão PauloBrasil Fundação Oswaldo Cruz Fiocruz Mato Grosso do SulCampo GrandeMSBrasil

Objective:To evaluate parasitemia by qPCR in patients undergoing etiological treatment and followed in a Brazilian reference ***:Parasite load was quantified by qPCR in 32 participants with chronic Chagas disease who were treated with *** analyses were performed before and after the treatment and parasite loads were compared prior and 12/18 months post the ***:Thirty-two participants were recruited and treated with benznidazole,and 20 were *** events(AE)were observed in 22 out of 29 participants that had safety data(76%),and dermatological alterations were the most frequently observed *** the 20 participants analyzed,13 and 7 completed 12 and 18 months follow-up after the treatment,respectively.12 Months after the final treatment,Trypanosoma cruzi was detectable in 3 patients by qPCR;18 months after the final treatment,Trypanosoma cruzi was detectable per qPCR in 4 of the 7 ***,between 12 and 18 months,7 participants of the 20 initial follow-up cases showed positive qPCR,indicating treatment ***:qPCR can be used as an alternative method for evaluating the effectiveness of the etiological treatment of CD,and can be applied to analyze early therapeutic *** study showed that benznidazole therapy had limited effectiveness in treating chronic CD patients,thus emphasizing the importance of conducting continued research for developing more effective therapies and diagnosis for CD.

关键词： Trypanosoma cruzi Chagas disease Antitrypanosomal therapy Benznidazole qPCR Therapeutic failure