Página 1 dos resultados de 68508 itens digitais encontrados em 0.013 segundos

GNSS/NTRIP service and technique: accuracy tests; Testes de acurácia para o serviço e técnica GNSS/NTRIP

CINTRA, Jorge Pimentel; NERO, Marcelo Antonio; RODRIGUES, Danilo
Fonte: Universidade Federal do Paraná Publicador: Universidade Federal do Paraná
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
341.56695%
Experiments conducted at the School of Engineering of the University of São Paulo, Brazil, using GNSS/NTRIP technology are described and analyzed in terms of accuracy. The method consists in using the data of a reference station, the IBGE RBMC-IP stations, collected in a remote station, by means of the Internet and a mobile phone, to obtain more accurate real time coordinates than those of the navigation method. The experiments consist in surveying the known coordinate points and of the error analysis (accuracy). Firstly with short distances (in the USP Base for Equipment Calibration), and then over increasing distances up to about 30 km, in terms of the limits foreseen for the RTK method, and for other greater distances by using the DGPS method, up to 2,700 km. The following were tested and analyzed: the use of different reference stations, the variation in accuracy over distance, the use of a L1 receiver and a L1/L2 one, as well as the use of the RTK and DGPS techniques, in terms of accuracy reached, that is, the difference between these coordinates and others considered as standard, besides checking if the equipment reaches or not the accuracy stated in the manual.; O presente trabalho descreve e analisa as experiências realizadas na Escola Politécnica utilizando a tecnologia GNSS/NTRIP...

Evaluation of Pain and Accuracy Diagnostic in Hospitalized Children

Predebon, Caroline Maier; Cruz, Dina de Almeida Lopes Monteiro da; Matos, Fabiana Gonçalves de Oliveira Azevedo; Ferreira, Anali Martegani; Pasin, Simone; Rabelo, Eneida Rejane
Fonte: WILEY-BLACKWELL; HOBOKEN Publicador: WILEY-BLACKWELL; HOBOKEN
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
342.17824%
PURPOSE: Acute pain occurs in over 50% of hospitalized children. The accuracy of this diagnosis has been underexplored in the literature, as has the role of training to implement pain assessment. This study analyzed the accuracy of acute pain diagnoses after the implementation of a systematic evaluation of pain (study intervention). METHOD: The sample was divided into: pre- and postintervention. The Nursing Diagnosis Accuracy Scale, which scores accuracy as null, low, moderate, or high, was used. RESULTS: In the postimplementation, acute pain was diagnosed more often. However, accuracy only improved in the moderate category. CONCLUSION: Diagnosis of acute pain increased in the postimplementation period, but accuracy did not. IMPLICATIONS: The development of strategies for improvement of diagnostic accuracy is warranted.; Hospital de Clinicas de Porto Alegre

Fatores preditores da acurácia dos diagnósticos de enfermagem; Predictor factors of accuracy of nursing diagnoses

Matos, Fabiana Gonçalves de Oliveira Azevedo
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 15/12/2010 PT
Relevância na Pesquisa
344.02816%
A acurácia dos diagnósticos de enfermagem é importante para a escolha de intervenções adequadas, mas ainda pouco se conhece sobre os fatores que a influenciam. Objetivos: identificar os fatores preditores da acurácia de diagnósticos de enfermagem; descrever o grau de acurácia dos diagnósticos de enfermagem documentados na prática clínica e testar a concordância intra e entre avaliadores na aplicação da Escala de Acurácia de Diagnósticos de Enfermagem Versão 2. Método: estudo documental realizado num hospital público de ensino da cidade de São Paulo, Brasil. A acurácia dos diagnósticos de enfermagem documentados na admissão de pacientes foi estimada por meio da aplicação da EADE Versão 2, que possui 4 itens para o julgamento da presença, relevância, especificidade e coerência das pistas existentes para o diagnóstico em avaliação. As respostas aos itens são pontuadas e geram um escore final variando de 0 a 13,5 (0 / 1 / 2 / 4,5 / 5,5 / 9 / 10 / 12,5 ou 13,5). A amostra do estudo foi aleatória, composta pelos registros de admissão de 749 pacientes adultos internados na clínica médica ou cirúrgica entre julho de 2005 e junho 2008. Todos os enfermeiros que documentaram as admissões avaliadas forneceram informações de características pessoais e profissionais. Foram computados dados de caracterização dos pacientes que tiveram seus registros analisados. Foram realizados testes de associação entre o grau de acurácia dos diagnósticos e variáveis dos diagnósticos...

A Thorough Accuracy Estimation of DTM Produced from Airborne Full-Waveform Laser Scanning Data of Unmanaged Eucalypt Plantations

Gonçalves, Gil; Gomes Pereira, Luísa
Fonte: IEEE Publicador: IEEE
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
340.8066%
A digital terrain model (DTM) is needed to extract forest variables. Its accuracy affects that of these variables, and thus it has to be known. Airborne laser scanning (ALS) is being increasingly used to produce DTM. The potential of full-waveform ALS (FWALS), however, for DTM production in forest areas has not been thoroughly evaluated, particularly under adverse conditions of heterogeneous forest stands, such as the typically extensively managed eucalypt plantations of north-central Portugal studied here. In the study area of 900 ha, an exhaustive assessment of FWALS-derived DTM accuracy was carried out based on the field survey of 43 plots. In each of these circular plots of roughly 400 m2, the coordinates were measured for all trees and all prominent terrain points using Global Navigation Satellite Systems receivers and total station. In addition, the quality of the FWALS data was assessed by surveying 1 m × 1 m grids of points on three bare areas. The accuracy assessment measures are computed by assuming normal and nonnormal distributions of the differences between the h values of FWALS terrain points and those of control points at the same planimetric locations. While the accuracy of the FWALS data is as expected, around 3 cm...

Surface detail reproduction and dimensional accuracy of stone models: influence of disinfectant solutions and alginate impression materials

Guiraldo,Ricardo Danil; Borsato,Thaís Teixeira; Berger,Sandrine Bittencourt; Lopes,Murilo Baena; Gonini-Jr,Alcides; Sinhoreti,Mário Alexandre Coelho
Fonte: Fundação Odontológica de Ribeirão Preto Publicador: Fundação Odontológica de Ribeirão Preto
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2012 EN
Relevância na Pesquisa
340.8066%
This study compared the surface detail reproduction and dimensional accuracy of stone models obtained from molds disinfected with 2% sodium hypochlorite, 2% chlorhexidine digluconate or 0.2% peracetic acid to models produced using molds which were not disinfected, with 3 alginate materials (Cavex ColorChange, Hydrogum 5 and Jeltrate Plus). The molds were prepared over matrix containing 20-, 50-, and 75-µm lines, performed under pressure with perforated metal tray. The molds were removed following gelation and either disinfected (using one of the solutions by spraying followed by storage in closed jars for 15 min) or not disinfected. The samples were divided into 12 groups (n=5). Molds were filled with dental gypsum Durone IV and 1 h after the start of the stone mixing the models were separated from the tray. Surface detail reproduction and dimensional accuracy were evaluated using optical microscopy on the 50-µm line with 25 mm in length, in accordance with the ISO 1563 standard. The dimensional accuracy results (%) were subjected to ANOVA. The 50 µm-line was completely reproduced by all alginate impression materials regardless of the disinfection procedure. There was no statistically significant difference in the mean values of dimensional accuracy in combinations between disinfectant procedure and alginate impression material (p=0.2130) or for independent factors. The disinfectant solutions and alginate materials used in this study are no factors of choice regarding the surface detail reproduction and dimensional accuracy of stone models.

GNSS/NTRIP service and technique: accuracy tests

Cintra,Jorge Pimentel; Nero,Marcelo Antonio; Rodrigues,Danilo
Fonte: Universidade Federal do Paraná Publicador: Universidade Federal do Paraná
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2011 EN
Relevância na Pesquisa
341.56695%
Experiments conducted at the School of Engineering of the University of São Paulo, Brazil, using GNSS/NTRIP technology are described and analyzed in terms of accuracy. The method consists in using the data of a reference station, the IBGE RBMC-IP stations, collected in a remote station, by means of the Internet and a mobile phone, to obtain more accurate real time coordinates than those of the navigation method. The experiments consist in surveying the known coordinate points and of the error analysis (accuracy). Firstly with short distances (in the USP Base for Equipment Calibration), and then over increasing distances up to about 30 km, in terms of the limits foreseen for the RTK method, and for other greater distances by using the DGPS method, up to 2,700 km. The following were tested and analyzed: the use of different reference stations, the variation in accuracy over distance, the use of a L1 receiver and a L1/L2 one, as well as the use of the RTK and DGPS techniques, in terms of accuracy reached, that is, the difference between these coordinates and others considered as standard, besides checking if the equipment reaches or not the accuracy stated in the manual.

Improving accuracy of selection of young bulls by Pastoralists

Pitchford, W.
Fonte: Elsevier Science BV Publicador: Elsevier Science BV
Tipo: Artigo de Revista Científica
Publicado em //2007 EN
Relevância na Pesquisa
340.8066%
A key to maximising response to selection in pastoral cattle kept by groups such as the Sub-Saharan Maasai is an accurate selection of young bulls. A breeding objective was developed based on weight, reproductive rate (days to calving), temperament, tick resistance and trypanotolerance. Accuracy of selection was defined as the correlation between the breeding objective and various selection indices. Accuracy was evaluated assuming availability of information on a range of traits (those in objective plus scrotal circumference) from individuals, parents, grand-parents, half-sibs, progeny and genetic markers. Various scenarios that represent what could occur at the village level were tested. Just selecting on weight alone had an accuracy of 0.538. Additional measurements on the individual (including repeated measures) had a large effect on accuracy. Records on relatives were less helpful than expected. Genetic markers for traits which are difficult to measure (days to calving and trypanotolerance) were helpful for improving accuracy. However, they are unlikely to be used in the near future because of cost and availability. An additional output from this study is simple selection indices that could be implemented immediately at the village level.; http://www.elsevier.com/wps/find/journaldescription.cws_home/706547/description#description; W.S. Pitchford; Copyright © 2006 Elsevier B.V. All rights reserved.

Accuracy test for in-vitro micro-computed tomography

Stoico, R.; Tassani, S.; Perilli, E.; Baruffaldi, F.; Viceconti, M.
Fonte: Springer; Germany Publicador: Springer; Germany
Tipo: Conference paper
Publicado em //2009 EN
Relevância na Pesquisa
342.17824%
The present work aims to describe and discuss the application of an accuracy test for in-vitro micro-computed tomography (microCT). Accuracy of morphometric measures is required to the analysis of bone microstructure and the mechanical characterization of the tissue. The accuracy test was introduced in a program of quality control designed for trabecular bone morphometry. It was applied using a physical calibration phantom that reproduced the three-dimensional structure of the typically investigated object, i.e. trabecular bone structure. The phantom was used to test the quality of accuracy measurements. The absolute error was chosen as the quality control parameter in accuracy test. The Shewhart control chart was introduced to monitor the quality control parameter. Baseline value was calculated as reference value for the control chart during acceptance/status test. An out of control condition was defined as the monthly measure that was out of the tolerance limits determined by the adopted chart. A maintenance service has been suggested upon the occurrence of this condition. During the monitoring period of 15-months no out of control conditions in accuracy test were recorded, as confirmed by the statistical C and Kruskal Wallis tests. Thus...

The accuracy of influenza A (H1N1) "swine flu" laboratory testing: a systematic review of diagnostic test accuracy.

White, Sarahlouise
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2011
Relevância na Pesquisa
342.68035%
Background: Influenza A (H1N1) recently became pandemic, highlighting the need for a cheap and accurate diagnostic test to diagnose this virus in a clinically relevant timeframe. The current reference standard (viral culture) requires a significant degree of technical expertise, laboratory time, resources and can take up to 10 days to obtain a result, during which time there could be a significant spread of infection. The objective of this study was to obtain summary estimates of the diagnostic accuracy of currently available laboratory tests compared to viral culture for the diagnosis of Influenza A (H1N1) from respiratory samples. Search Strategy: Diagnostic tests are still poorly indexed by major databases; therefore the search strategy was deliberately very broad. A range of databases of both published and Grey Literature were searched, using both Medical Subject Headings and text words. The reference lists of included studies and review articles were also searched for additional studies. Selection Criteria: Studies that compared the diagnostic accuracy of any laboratory test (index test) compared to viral culture as the reference test were considered for inclusion. The inclusion criteria required each patient to undergo both the index and reference test...

Factors influencing accuracy of caries risk assessment among South Australian Children.

Ha, Diep Hong
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2011
Relevância na Pesquisa
344.2611%
This thesis examined factors associated with the accuracy of caries risk assessment by South Australian Dental Service (SADS) staff for children enrolled in the school dental service. Understanding those factors can help to address variation in accuracy of assessment and ultimately caries risk among children. The aims of this thesis were to examine the relationship between clinician’s assessment of caries risk at a baseline examination and subsequent caries development and to explore the association between accuracy in caries risk assessment and clinician- and patient-related factors. This study consisted of four sub-studies which addressed a set of specific objectives. Two data sources were used in the analysis. The first dataset was obtained from the South Australian component of the Child Dental Health Survey, an ongoing national surveillance survey of the oral health status of Australian children attending school dental services in all states and territories. Data on caries experience were extracted from electronic examination records collected during the period 2002–2005. These data included caries experience (decayed, missing and filled tooth surfaces) of the deciduous (dmfs) and permanent dentition (DMFS). The level of risk status assigned by clinicians at the baseline examination as well as socio-demographic factors of those children...

The accuracy of Influenza A (H1N1) “swine flu” laboratory testing: a systematic review of diagnostic test accuracy

White, S.; Schultz, T.
Fonte: Joanna Briggs Institute Publicador: Joanna Briggs Institute
Tipo: Artigo de Revista Científica
Publicado em //2013 EN
Relevância na Pesquisa
343.10016%
BACKGROUND Influenza A (H1N1) recently became pandemic, highlighting the need for a cheap and accurate diagnostic test to diagnose this virus in a clinically relevant timeframe. The current reference standard (viral culture) requires a significant degree of technical expertise, laboratory time, resources and can take up to ten days to obtain a result, during which time there could be a significant spread of infection. OBJECTIVES To obtain summary estimates of the diagnostic accuracy of currently available laboratory tests compared to viral culture for the diagnosis of Influenza A (H1N1) from respiratory samples. INCLUSION CRITERIA TYPES OF PARTICIPANTS Patients presenting with influenza-like illnesses and who underwent both an index and reference test specific for influenza A (H1N1). FOCUS OF THE REVIEW The diagnostic test accuracy of tests for laboratory tests for Influenza A (H1N1) TYPES OF STUDIES Diagnostic test accuracy studies that compared the diagnostic accuracy of any laboratory test (index test) compared to viral culture as the reference test were considered for inclusion. SEARCH STRATEGY Diagnostic tests are still poorly indexed by major databases; therefore the search strategy was deliberately very broad and was conducted across 14 major databases during May 2010. METHODOLOGICAL QUALITY Methodological quality was determined using the QUADAS checklist. Overall the methodological quality of the studies was moderate...

Are patient characteristics associated with the accuracy of hysterosalpingography in diagnosing tubal pathology? An individual patient data meta-analysis

Broeze, K.; Opmeer, B.; Van Geloven, N.; Coppus, S.; Collins, J.; Den Hartog, J.; van der Linden, P.; Marianowski, P.; Ng, E.; van der Steeg, J.; Steures, P.; Strandell, A.; van der Veen, F.; Mol, B.
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
Publicado em //2011 EN
Relevância na Pesquisa
340.8066%
BACKGROUND: Conventional meta-analysis has estimated the sensitivity and specificity of hysterosalpingography (HSG) to be 65% and 83%. The impact of patient characteristics on the accuracy of HSG is unknown. The aim of this study was to assess by individual patient data meta-analysis whether the accuracy of HSG is associated with different patient characteristics. METHODS: We approached authors of primary studies reporting on the accuracy of HSG using findings at laparoscopy as the reference. We assessed whether patient characteristics such as female age, duration of subfertility and a clinical history without risk factors for tubal pathology were associated with the accuracy of HSG, using a random intercept logistic regression model. RESULTS: We acquired data of seven primary studies containing data of 4521 women. Pooled sensitivity and specificity of HSG were 53% and 87% for any tubal pathology and 46% and 95% for bilateral tubal pathology. In women without risk factors, the sensitivity of HSG was 38% for any tubal pathology, compared with 61% in women with risk factors (P = 0.005). For bilateral tubal pathology, these rates were 13% versus 47% (P = 0.01). For bilateral tubal pathology, the sensitivity of HSG decreased with age [factor 0.93 per year (P = 0.05)]. The specificity of HSG was very stable across all subgroups. CONCLUSIONS: The accuracy of HSG in detecting tubal pathology was similar in all subgroups...

Análise da qualidade posicional das bases do Google Maps, Bing Maps e da Esri para referência espacial em projetos em SIG: aplicação para o município de São Paulo.; Horizontal positional accuracy of Bing Maps, Google Maps and Esri's World Imagegery as spatial references within a geographic information system for the municipality of São Paulo.

Sztutman, Paulo
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 09/12/2014 PT
Relevância na Pesquisa
341.56695%
A presente pesquisa analisou a acurácia posicional horizontal das bases do Bing Maps, Google Maps e da World Imagery da Esri quando utilizadas como referência espacial on-line em um Sistema de Informação Geográfica no Município de São Paulo (MSP). A metodologia adotada foi a baseada no Decreto Federal no 89.817/84 e na Análise Estatística proposta por Merchant (1982). A análise da acurácia foi desenvolvida a partir das diferenças entre as coordenadas de 240 pontos nas cartas 1:1.000 do Mapa Digital da Cidade de São Paulo (MDC) em relação às coordenadas homólogas nas três bases, considerando separadamente as coordenadas do eixo Norte e Este. A base do Google Maps para o MSP foi dividida em duas (mosaico de ortofotos na área central e mosaico de imagens de satélite nas regiões periféricas), devido à grande diferença de acurácia entre os dois produtos. Para classificar cada base a partir do Decreto 89.817 foi definida a escala na qual somente 10% das discrepâncias tivessem seu valor superior ao PEC, e a escala na qual o Root Mean Square Error (RMSE) da amostra das discrepâncias fosse igual a 60,8% do PEC. A escala final selecionada foi a menor (menos detalhada) entre as definidas em cada um dos processos. A Análise Estatística foi baseada nos testes de tendência e precisão. Como as três bases apresentaram tendência...

100% classification accuracy considered harmful: The normalized information transfer factor explains the accuracy paradox

Valverde-Albacete, Francisco J.; Peláez-Moreno, Carmen
Fonte: PLOS (Public Library of Science) Publicador: PLOS (Public Library of Science)
Tipo: info:eu-repo/semantics/publishedVersion; info:eu-repo/semantics/article
Publicado em /01/2014 ENG
Relevância na Pesquisa
343.45637%
The most widely spread measure of performance, accuracy, suffers from a paradox: predictive models with a given level of accuracy may have greater predictive power than models with higher accuracy. Despite optimizing classification error rate, high accuracy models may fail to capture crucial information transfer in the classification task. We present evidence of this behavior by means of a combinatorial analysis where every possible contingency matrix of 2, 3 and 4 classes classifiers are depicted on the entropy triangle, a more reliable information-theoretic tool for classification assessment. Motivated by this, we develop from first principles a measure of classification performance that takes into consideration the information learned by classifiers. We are then able to obtain the entropy-modulated accuracy (EMA), a pessimistic estimate of the expected accuracy with the influence of the input distribution factored out, and the normalized information transfer factor (NIT), a measure of how efficient is the transmission of information from the input to the output set of classes. The EMA is a more natural measure of classification performance than accuracy when the heuristic to maximize is the transfer of information through the classifier instead of classification error count. The NIT factor measures the effectiveness of the learning process in classifiers and also makes it harder for them to "cheat" using techniques like specialization...

Next-generation low-cost motion capture systems can provide comparable spatial accuracy to high-end systems

Thewlis, D.; Bishop, C.; Daniell, N.; Paul, G.
Fonte: Human Kinetics Publicador: Human Kinetics
Tipo: Artigo de Revista Científica
Publicado em //2013 EN
Relevância na Pesquisa
340.8066%
The objective quantification of three-dimensional kinematics during different functional and occupational tasks is now more in demand than ever. The introduction of new generation of low-cost passive motion capture systems from a number of manufacturers has made this technology accessible for teaching, clinical practice and in small/medium industry. Despite the attractive nature of these systems, their accuracy remains unproved in independent tests. We assessed static linear accuracy, dynamic linear accuracy and compared gait kinematics from a Vicon MX20 system to a Natural Point OptiTrack system. In all experiments data were sampled simultaneously. We identified both systems perform excellently in linear accuracy tests with absolute errors not exceeding 1%. In gait data there was again strong agreement between the two systems in sagittal and coronal plane kinematics. Transverse plane kinematics differed by up to 3° at the knee and hip, which we attributed to the impact of soft tissue artifact accelerations on the data. We suggest that low-cost systems are comparably accurate to their high-end competitors and offer a platform with accuracy acceptable in research for laboratories with a limited budget.; Dominic Thewlis, Chris Bishop...

The Effects of Post-Recall Feedback: Examining Witness Recall Quantity, Accuracy, and Confidence

Hirn Mueller, Dana Elizabeth
Fonte: FIU Digital Commons Publicador: FIU Digital Commons
Tipo: Artigo de Revista Científica Formato: application/pdf
Relevância na Pesquisa
340.8066%
Most eyewitness identification protocols recommend withholding feedback after an identification has been made, at least until a measure of confidence can be gathered. Although much research has examined the impact of post-identification feedback on subsequent witness behavior and confidence, research addressing the importance of post-recall feedback remains largely incomplete. The current study examined the effects of post-recall feedback and question type on subsequent witness recall, confidence, and reports of view of the crime. In line with previous eyewitness identification research, it was predicted that participants receiving confirming post-recall feedback would be more confident in their prior recall compared to participants receiving neutral, no, or disconfirming feedback. One hundred and fifty-eight participants viewed a mock crime video of a robbery followed by an interview which included both open-ended and cued questions. Participants were then given either confirming, neutral, no, or disconfirming feedback and asked about their confidence and the clarity of their view of the perpetrator. Under the pretense that the recording equipment failed, participants were interviewed again using the same question format. The second interview was followed by a series of suggestive questions. After the second interview...

Do Shared Interests Affect the Accuracy of Budgets?

Beuren,Ilse Maria; Beck,Franciele; Popik,Fabiane
Fonte: Universidade de São Paulo, Faculdade de Economia, Administração e Contabilidade, Departamento de Contabilidade e Atuária Publicador: Universidade de São Paulo, Faculdade de Economia, Administração e Contabilidade, Departamento de Contabilidade e Atuária
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2015 EN
Relevância na Pesquisa
341.56695%
The creation of budgetary slack is a phenomenon associated with various behavioral aspects. This study focuses on accuracy in budgeting when the benefit of the slack is shared between the unit manager and his/her assistant. In this study, accuracy is measured by the level of slack in the budget, and the benefit of slack represents a financial consideration for the manager and the assistant. The study aims to test how shared interests in budgetary slack affect the accuracy of budget reports in an organization. To this end, an experimental study was conducted with a sample of 90 employees in management and other leadership positions at a cooperative that has a variable compensation plan based on the achievement of organizational goals. The experiment conducted in this study is consubstantiated by the study of Church, Hannan and Kuang (2012), which was conducted with a sample of undergraduate students in the United States and used a quantitative approach to analyze the results. In the first part of the experiment, the results show that when budgetary slack is not shared, managers tend to create greater slack when the assistant is not aware of the creation of slack; these managers thus generate a lower accuracy index than managers whose assistants are aware of the creation of slack. When budgetary slack is shared...

Order of accuracy study of unstructured grid finite volume upwind schemes

Azevedo,João Luiz F.; Figueira da Silva,Luís F.; Strauss,Daniel
Fonte: Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM Publicador: Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2010 EN
Relevância na Pesquisa
341.56695%
A detailed numerical study is presented of the order of accuracy of some proposed cell centered, finite volume schemes used for the solution of the 2-D gasdynamic equations on triangular unstructured grids. The schemes studied are based on a MUSCL-type linear reconstruction of interface properties, which seeks to achieve 2nd-order accuracy in space. They are also nominally flux-vector splitting-type schemes, and the results here presented use Liou's AUSM+ algorithm. The basic aspects effecting the scheme's order of accuracy are the form in which the reconstruction process is designed and the form in which the limiting process is performed. Two basic concepts are tested with regard to the reconstruction process, namely the use of 1-D-type and gradient-based reconstruction. The limiter can also be constructed as a 1-D-type limiter or as a truly multi-dimensional limiter. The schemes are tested on a linear convection-like model equation and the numerical solutions are compared to the analytical solution, for different mesh sizes, in order to assess the scheme's order of accuracy. For comparison purposes, the results obtained with a centered scheme are also presented. Second-order accuracy is shown to be only obtained for the centered scheme. The nominally 2nd-order upwind algorithms lead to actual orders of accuracy...

Accuracy of continuous glucose monitoring during three closed-loop home studies under free-living conditions.

Thabit, Hood; Leelarathna, Lalantha; Wilinska, Malgorzata E.; Elleri, Daniela; Allen, Janet M.; Lubina-Solomon, Alexandra; Walkinshaw, Emma; Stadler, Marietta; Choudhary, Pratik; Mader, Julia K.; Dellweg, Sibylle; Benesch, Carsten; Pieber, Thomas R.; Arno
Fonte: Mary Ann Liebert Publicador: Mary Ann Liebert
Tipo: Article; published version
EN
Relevância na Pesquisa
341.56695%
This is the final version of the article. It first appeared from Mary Ann Liebert via http://dx.doi.org/10.1089/dia.2015.0062; Objectives Closed-loop (CL) systems modulate insulin delivery based on glucose levels measured by continuous glucose monitor (CGM). Accuracy of CGM affects CL performance and safety. We evaluated the accuracy of the Freestyle Navigator II CGM during three unsupervised, randomised, open-label crossover home CL studies. Methods Paired CGM and capillary glucose values (10,597 pairs) were collected from 57 participants with type 1 diabetes [41 adults (age 39?12 years, HbA 1c 7.9?0.8%; mean?SD) recruited at five centres and 16 adolescents (15.6?3.6 years, HbA1c 8.1?0.8%) recruited at two centres]. Numerical accuracy was assessed by absolute relative difference (ARD) and ISO 15197:2013 15/15% limits, and clinical accuracy by the Clarke error grid analysis. Results Total duration of sensor use was 2,002 days (48,052 hours). Overall sensor accuracy for the capillary glucose range (1.1 to 27.8 mmol/L) showed mean?SD and median (IQR) ARD of 14.2?15.5 % and 10.0 (4.5, 18.4) %, respectively. Lowest mean ARD was observed in the hyperglycaemic range (9.8?8.8 %). Over 95% of pairs were in combined Clarke error grid zones A and B (A: 80.1%...

Effects of different types of forensic information on eyewitness' memory and confidence accuracy

Sarwar,Farhan; Martin Allwood,Carl; Innes-Ker,Åse
Fonte: The European Journal of Psychology Applied to Legal Context Publicador: The European Journal of Psychology Applied to Legal Context
Tipo: info:eu-repo/semantics/article; journal article; info:eu-repo/semantics/publishedVersion Formato: text/html; application/pdf
Publicado em 01/01/2014 ENG
Relevância na Pesquisa
342.17824%
This study investigated eyewitnesses' memory and confidence accuracy for action information (what happened at the crime scene), and detail information (descriptions of persons, objects, time and place). In Experiment 1, 89 participants watched a film and participated in one of four conditions: Laboratory discussion, Family discussion, Retell and Control, the first three with five meetings each. Three weeks later all participants open free recalled the events, and confidence judged their answers. The participants showed better free recall and confidence accuracy for action than for detail information. Participants in the two discussion conditions and in the Retell condition recalled more items and those in the Lab-discussion and Retell conditions more correct items for action information, than those in Control group. However, the four conditions did not differ for proportion correct of all action items recalled and confidence accuracy for action items. In brief, Experiment 1 showed that witness discussions and retellings of the experienced event with others improved recall for action information but had had no, or small, effects on confidence accuracy. Experiment 2 investigated recall and confidence accuracy performance for action and detail information using focused questions. Seventy-seven participants watched a film...