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Quantitative hazard assessment system(Has-Q) for open pit mine slopes

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International Journal of Mining Science and Technology 2019年第3期29卷 419-427页

作者： Tatiana Barreto dos Santos Milene Sabino Lana tiago Martins pereira Ismet Canbulat Mining Engineering Department Universidade Estadual de Minas GeraisJoao Monlevade 35930314Brazil Mining Engineering Department Universidade Federal de Ouro PretoOuro Preto 35400000Brazil Statistical Department Universidade Federal de Ouro PretoOuro Preto 35400000Brazil School of Minerals and Energy Resources Engineering University of New South WalesSydneyNSW 2052Australia

Rock slope hazard assessment is an important part of risk analysis for open pit *** main parameters that can lead to rock slope failures are the parameters traditionally used in geomechanical classifications,the slope geometrical parameters and external factors like rainfall and *** paper presents a methodology for a hazard assessment system for open pit mine slopes based on 88 cases collated around the world using principal components analysis,discriminant analysis and confidence *** historical cases used in this study included copper,gold,iron,diamond,lead and zinc,platinum and claystone *** variables used in the assessment methodology are uniaxial compressive strength of intact rock;spacing,persistence,opening,roughness,infilling and orientation of the main discontinuity set;weathering of the rock mass;groundwater;blasting method;and height and inclination of the *** principal component analysis was used to quantify the data,the discriminant analysis was used to establish a rule to classify new slopes about its stability *** provide a practical hazard assessment system,confidence ellipses were used to propose a hazard graph and generate the *** discriminant rule developed in this research has a high discrimination capacity with an error rate of 11.36%.

关键词： Hazard assessment Risk analysis Open pit mine slopes Multivariate statistics

Vertical stratification of bat assemblages in flooded and unflooded Amazonian forests

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Current Zoology 2010年第4期56卷 469-478页

作者： Maria Joo Ramos pereira Joo tiago MARQUES Jorge M.PALMEIRIM Centro de Biologia Ambiental Departamento de Biologia Animal Faculdade de Ciências da Universidade de Lisboa Instituto de Desenvolvimento Sustentvel Mamirau

Tropical rainforests usually have multiple strata that results in a vertical stratification of ecological opportunities foranimals. We investigated if this stratification influences the way bats use the vertical space in flooded and unflooded forests of theCentral Amazon. Using mist-nets set in the canopy (17 to 35 m high) and in the understorey (0 to 3 m high) we sampled four sitesin upland unflooded forests (terra firme), three in forests seasonally flooded by nutrient-rich water (varzea), and three in forestsseasonally flooded by nutrient-poor water (igapo). Using rarefaction curves we found that species richness in the understorey andcanopy were very similar. An ordination analysis clearly separated the bat assemblages of the canopy from those of the understorey inboth flooded and unflooded habitats. Gleaning carnivores were clearly associated with the understorey, whereas frugivores wereabundant in both strata. Of the frugivores, Carollinae and some Stenodermatinae were understorey specialists, but several Stenodermatinaemostly used the canopy. The first group mainly includes species that, in general, feed on fruits of understorey shrubs,whereas the second group feed on figs and other canopy fruits. We conclude that vertical stratification in bat communities occurseven within forests with lower canopy heights, such as Amazonian seasonally flooded forests, and that the vertical distribution ofbat species is closely related to their diet and foraging behaviour.

关键词： Amazon Bats Chiroptera Vertical stratification Floodplain

19-year remotely sensed data in the forecast of spectral models of the environment

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International Journal of Digital Earth 2021年第8期14卷 1040-1066页

作者： Fernando Saragosa Rossi Carlos Antonio da Silva Junior JoséFrancisco de Oliveira-Júnior Paulo Eduardo Teodoro Luciano Shozo Shiratsuchi Mendelson Lima Larissa pereira Ribeiro Teodoro Auana Vicente tiago Guilherme Fernando Capristo-Silva State University of Mato Grosso(UNEMAT) Alta FlorestaMato GrossoBrazil Department of Geography State University of Mato Grosso(UNEMAT)SinopMato GrossoBrazil cFederal University of Alagoas(UFAL) MaceióAlagoasBrazil dFederal University of Mato Grosso do Sul(UFMS) Chapadão do SulMato Grosso do SulBrazil eAgCenter School of PlantEnvironmentaland Soil SciencesLouisiana State University(LSU)Baton RougeLouisianaUSA fPostgraduate Program in Agronomy Federal University of Mato Grosso(UFMT)SinopMato GrossoBrazil

The aims of this study were:i)to compare no-till areas in two municipalities located in different regions of Brazil,along with the influence on CO_(2)Flux and GPP,and ii)to verify the difference between environmental factors followed by the trends of these variables regarding future scenarios(ARIMA time-series model number).The study was carried out in two areas with different latitudes in the municipalities of Sinop-MT and Passo Fundo-RS,both in Brazil.A time series of 19 years was performed with data acquired by remote sensing from the following satellites:i)Landsat-8(OLI and TIRS),and ii)TERRA/AQUA(MODIS).The results propound that the spectro-temporal variables are directly influenced by soil management and agricultural practices over the observation time,with a satisfactory correlation in future predictions of the variables for the next ten years,in which presented that the variation of GPP and albedo values for the two study sites would gradually increase until 2028 and the temperature remained constant between the range of its seasonality,and CO_(2)Flux tends to decrease in its seasonality,indicating a higher CO_(2) absorption.

关键词： ARIMA numerical modeling remote sensing orbital products tillage

Effect of applying a calcined kaolin-based particle film on the photosynthetic capacity and growth of young eucalyptus plants

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Journal of Forestry Research 2021年第6期32卷 2473-2484页

作者： Diego pereira Santos Mauriana da Rocha Sobrinho Maria de Fatima de Castro Oliveira Niedja Bezerra Costa tiago Massi Ferraz Fabricio de Oliveira Reis Heder Braum Eliemar Campostrini Fabio Afonso Mazzei Moura de Assis Figueiredo Graduate Program in Agriculture and Environment State University of MaranhaoPraca Goncalves Diass/nCentroBalsasMA 65800-000Brazil Graduate Program in Agroecology State University of MaranhaoAv.Lourenco Vieira da Silva1000Jardim Sao CristovaoSao LuisMA 65055-310Brazil Graduate Program in Agronomy Campus SamambaiaEscola de AgronomiaFederal University of GoiasAv.Esperanca s/nGoianiaGO 74690-900Brazil State University of Maranhao Av.Lourenco Vieira da Silva1000Jardim Sao CristovaoSao LuisMA 65055-310Brazil Northern Rio de Janeiro State University Av.Alberto Lamego2000Campos dos GoytacazesRJ 28013-602Brazil

In scenarios of climatic change when increased global temperatures can be expected,it is essential to search for technologies that favor sapling survival and growth after planting and increase yield in the ***-based particle films(KBPF)have been applied as barriers against the deleterious effects of high levels of solar *** objective of the present study was to assess the effects of applying purified calcined kaolin-based particle film to young eucalyptus *** treatments were carried out:0%(just water),3%,5%,7%,and 10%calcined kaolin applied to the adaxial part of the leaves.A complete randomized block design was used with five treatments and ten *** plants were assessed for height,diameter at ground level,gas exchanges(net photosynthetic CO_(2) assimilation,stomatal conductance and transpiration),instantaneous(WUE)and intrinsic water use efficiency(IWUE),chlorophyll a fluorescence(maximum quantum yield of photosystem II(PSII)(Fv/Fm),concentration of active reaction centers in relation to the quantity of photons absorbed(RC/ABS)and the maximum ratio of quantum yields of photochemical and concurrent non-photochemical processes in PSII(Fv/F0),SPAD reading and leaf *** 3%KBPF concentration showed the best responses in biometric assessments 80 days after planting(daP)and were corroborated by the responses of the leaf,stem and shoot dry matter production as a *** leaf ontogeny assessments showed positive responses following KBPF application when considering leaf development,with 7%KBPF concentration resulting in the highest mean *** mean specific leaf mass had negative response to high KBPF *** 60 daP,the gas exchange variables during both assessment periods declined with an increase in KBPF *** differences as a result of KBPF applications were found only at the start of the assessments(34 daP)for both WUE and for ***‘greenness’(SPAD reading)at 47 days showed a quadratic

关键词： Ecophysiology Photoprotection Yield Silviculture

Direct-acting antivirals for chronic hepatitis C treatment: The experience of two tertiary university centers in Brazil

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World Journal of Hepatology 2022年第1期14卷 195-208页

作者： Mariana Sandoval Lourenço Patricia Momoyo Y Zitelli Marlone cunha-Silva Arthur Ivan N Oliveira Cláudia P Oliveira tiago Sevá-pereira Flair JoséCarrilho Mario G Pessoa daniel F Mazo Division of Gastroenterology Department of Internal MedicineSchool of Medical SciencesUniversity of CampinasSao Paulo 13083-878Brazil Division of Clinical Gastroenterology and Hepatology Department of GastroenterologyUniversity of São Paulo School of MedicineSao Paulo 05403-900Brazil

BACKGROUND Hepatitis C virus(HCV)treatment has undergone major changes in recent *** interferon-based therapies have been replaced by oral direct-acting antivirals(daA)regimens,with high sustained virologic response(SVR)rates,and a lower incidence of adverse events(AEs).AIM To evaluate the efficacy and safety of daAs for HCV treatment in subjects from two tertiary university centers in *** This is a multicenter retrospective cohort study of 532 patients with chronic hepatitis C(CHC),undergoing treatment with interferon-free regimens from November 2015 to November *** therapeutic regimen was defined by the current Brazilian guidelines for HCV management at the time of ***,anthropometric,clinical,and laboratory variables were *** were assessed at 12 to 24 wk after therapy by intention-to-treat(ITT),and modified ITT(m-ITT)*** and serious adverse events(SAEs)were *** the statistical analysis,a P value ofdaclatasvir±ribavirin was the most frequently used treatment(66.9%),followed by SOF plus simeprevir(21.2%).The overall ITT SVR was 92.6%(493/532),while the m-ITT SVR was 96.8%(493/509).Variables associated with treatment failure via ITT evaluation were hepatic encephalopathy(OR:4.320;95%CI:1.920-9.721,P=0.0004),presence of esophageal varices(OR:2.381;95%CI:1.137-4.988,P=0.0215),previous portal hypertensive bleeding(OR:2.756;95%CI:1.173-6.471,P=0.02),higher model for end-stage liver disease scores(OR:1.143,95%CI:1.060–1.233,P=0.0005),lower serum albumin levels(OR:0.528,95%CI:0.322-0.867,P=0.0115),higher serum creatinine(OR:1.117,95%CI:1.056-1.312,P=0.0033),and international normalized ratio(INR)levels(OR:5.542,95%CI:2.023-15.182,P=0.0009).AEs were reported

关键词： Chronic hepatitis C Antiviral agents Hepatitis C virus Sustained virologic response Liver cirrhosis Safety

A Single Case of Two Synchronous Metastatic Tumours

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Journal of Cancer Therapy 2019年第8期10卷 671-676页

作者： Filipa pereira tiago Alpoim Maria Leitao Manuela Machado Medical Oncology Department IPO PortoPortoPortugal

The incidence of multiple primary tumours increases with age and due to multiple other factors as environmental and genetic predisposition. The authors describe a case of a 77-year-old female patient with diagnosis in September 2009 of colon mucinous adenocarcinoma. She was submitted to surgery, considered R1 and adjuvant chemotherapy. Six months after treatment she had abdominal recurrence on a nodular lesion in peritoneal fat. The patient was submitted to surgery and did multiple courses of systemic treatment. She underwent cytoreductive surgery with hyperthermic chemotherapy, too. In December 2014 she presented a nodular lesion on the bladder and after excision, the histology confirmed a high-grade transitional cell carcinoma and she maintains treatment with endovesical BCG instillations. After that, she had no evidence of peritoneal disease progression. Besides the bad prognosis associated to peritoneal disease, our case report describes a long survival (5 years with no disease progression) in a patient with high risk at diagnosis to peritoneal recurrence. This case shows the importance of multimodal approach and the impact of locoregional treatment in localized metastatic disease.

关键词： Colon Cancer Bladder Cancer Multiple Primary Neoplasms Synchronous

Production and quality of eucalyptus mini-cuttings using kaolin-based particle films

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Journal of Forestry Research 2021年第3期32卷 953-965页

作者： Maria de Fátima de Castro Oliveira Diego pereira Santos Karolline Sena Figueredo Fabrício de Oliveira Reis tiago Massi Ferraz Heder Braun Eliemar Campostrini Fábio Afonso Mazzei Moura de Assis Figueiredo Graduate Program in Agriculture and Environment Centro de Estudos Superiores de BalsasState University of MaranhaoPraca Goncalves Diass/nCentro65800-000 BalsasMABrazil Enraize-E.M.Figueredo Ind.e Com.de Produtos Florestais Br 222Km 09Lote 52Margem Esquerda S/n:Chac.Belo HorizonteZona RualAcailandiaMABrazil Centro de Ciências Agrárias State University of MaranhaoAv.Lourenco Vieira da Silva1000Jardim Sao Cristovao65055-310 Sao LuísMABrazil CCTA Northern Rio de Janeiro State UniversityAv.Alberto Lamego200028013-602 Campos dos GoytacazesRJBrazil

Considering the expansion of forest plantations over the Brazilian territory and the imminent increase in air temperatures due to global warming,the search for technologies that ensure high levels of productivity and high quality plants in clonal nurseries is *** kaolin-based particle films(KBPF)has been used as a physical barrier to reduce the negative effects of excessive solar radiation and adverse *** effects of KBPF on production and physiological quality of eucalyptus mini-cuttings were evaluated during two different seasons.A randomized block design was used,consisting of five treatments and four *** concentrations(0,3%,5%,7%,and 10%)were tested here and six weekly replicates of each concentration was *** different kaolin concentrations and seasonal variations resulted in a quadratic response of the leaf SPAD reading during both daily evaluation *** applications resulted in a quadratic response of photochemical efficiency in the morning period,and an increasing specific leaf weight linear response,and during the dry season,the different kaolin concentrations resulted in a bud length quadratic *** results indicated that the kaolin application maintained the production and yield index statistically equal between weekly KBPF applications,improving photochemical efficiency,leaf thickness,SPAD reading,and bud *** use of KBPF could reduce the intervals between collections of mini-cuttings and increase nursery yields in environments that present high temperatures.

关键词： Photoprotector Ecophysiology Forestry Clonal propagation

Experimental verification of ill-defined topologies and energy sinks in electromagnetic continua

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Advanced Photonics 2022年第3期4卷 97-104页

作者： david E.Fernandes Ricardo A.M.pereira Sylvain Lannebère tiago A.Morgado Mário G.Silveirinha University of Coimbra Instituto de Telecomunicações and Department of Electrical EngineeringCoimbraPortugal University of Aveiro Instituto de TelecomunicaçõesDepartment of ElectronicsTelecommunications and InformaticsAveiroPortugal University of Lisbon Instituto Superior Técnico and Instituto de TelecomunicaçõesDepartment of Electrical EngineeringLisboaPortugal

.It is experimentally verified that nonreciprocal photonic systems with continuous translation symmetry may have an ill-defined *** topological classification of such systems is only feasible when the material response is regularized with a spatial-frequency *** experimentally demonstrate that adjoining a small air layer to the relevant material interface may effectively imitate an idealized spatial cutoff that suppresses the nonreciprocal response for short wavelengths and regularizes the ***,it is experimentally verified that nonreciprocal systems with an ill-defined topology may be used to abruptly halt the energy flow in a unidirectional waveguide due to the violation of the bulk-edge *** particular,we report the formation of an energy sink that absorbs the incoming electromagnetic waves with a large field enhancement at the singularity.

关键词： topological photonics nonreciprocity topological singularities bulk edge correspondence.

Impact of infection in hospitalized cirrhotic patients in a university hospital

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Open Journal of Gastroenterology 2012年第3期2卷 124-130页

作者： tiago dos Santos Ferreira tiago Sevá-pereira Jazon Romilson de Souza Almeida Milena Fioravante Ademar Yamanaka Elza Cotrim Soares Department of Internal Medicine Faculty of Medical Sciences University of Campinas (UNICAMP) Campinas Brazil Gastrocenter University of Campinas (UNICAMP) Campinas Brazil

Background: Infection increases the morbidity and mortality in liver cirrhosis patients. The aim of this study was to investigate the impact of infection related to survival and risk factors for death in adult patients with liver cirrhosis in a university hospital. Methods: In a retrospective cohort study of Brazilian hospitalized cirrhotic patients, medical records data were analysed, and all patients who have had one or more confirmed bacterial infection during admission were se-ected for the study. Also, some data as biochemical investigation, Child score, MELD estimation, and evolution and death event were included. Statistical analysis: chi-square, Fisher and Mann-Whitney tests were used. Uni and multivariate analysis were performed, according to Cox regression model. The significant statistical level was p 2.5 mg/dl had increased the risk of death of 4.1, 3.2 and 3.2, respectively. Conclusion: Bacterial infections in hospitalized cirrhotic patients deserve special care, mainly spontaneous bacterial peritonitis, and also patients whose hiponatremia, upper gastrointestinal bleeding, high levels of cre-atinine and MELD high score are found.

关键词： Infection Survival Curve Mortality Liver Cirrhosis