Relevant bibliographies by topics / Coincident indicators

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Coincident indicators'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Coincident indicators"

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Pant, Malika, and Yanliang Miao. "Coincident Indicators of Capital Flows." IMF Working Papers 12, no. 55 (2012): 1. http://dx.doi.org/10.5089/9781463937737.001.

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Arsov, Ivailo, Elie Canetti, Laura E. Kodres, and Srobona Mitra. "Near-Coincident Indicators of Systemic Stress." IMF Working Papers 13, no. 115 (2013): 1. http://dx.doi.org/10.5089/9781484343784.001.

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Etter, Richard, and Michael Graff. "Coincident and Leading Indicators of Manufacturing Industry." Journal of Business Cycle Measurement and Analysis 2004, no. 1 (March 8, 2004): 109–31. http://dx.doi.org/10.1787/jbcma-v2004-art7-en.

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Frale, Cecilia, Massimiliano Marcellino, Gian Luigi Mazzi, and Tommaso Proietti. "Survey data as coincident or leading indicators." Journal of Forecasting 29, no. 1-2 (January 2010): 109–31. http://dx.doi.org/10.1002/for.1142.

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Murasawa, Yasutomo. "Do coincident indicators have one-factor structure?" Empirical Economics 36, no. 2 (April 4, 2008): 339–65. http://dx.doi.org/10.1007/s00181-008-0198-x.

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Mehrotra, Aaron, and Jenni Pääkkönen. "Comparing China’s GDP statistics with coincident indicators." Journal of Comparative Economics 39, no. 3 (September 2011): 406–11. http://dx.doi.org/10.1016/j.jce.2011.03.003.

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Chauvet, Marcelle, and Simon Potter. "Coincident and leading indicators of the stock market." Journal of Empirical Finance 7, no. 1 (May 2000): 87–111. http://dx.doi.org/10.1016/s0927-5398(99)00015-8.

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Levanon, Gad. "Evaluating and Comparing Leading and Coincident Economic Indicators." Business Economics 45, no. 1 (January 2010): 16–27. http://dx.doi.org/10.1057/be.2009.29.

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Forni, Mario, Marc Hallin, Marco Lippi, and Lucrezia Reichlin. "Coincident and Leading Indicators for the Euro Area." Economic Journal 111, no. 471 (April 1, 2001): C62—C85. http://dx.doi.org/10.1111/1468-0297.00620.

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Stock, James H., and Mark W. Watson. "New Indexes of Coincident and Leading Economic Indicators." NBER Macroeconomics Annual 4 (January 1989): 351–94. http://dx.doi.org/10.1086/654119.

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Dissertations / Theses on the topic "Coincident indicators"

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Godinho, Artur Dias. "Previsão de atividade econômica por demanda de fretes." reponame:Repositório Institucional do FGV, 2018. http://hdl.handle.net/10438/24789.

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Este trabalho busca aprimorar um dos métodos de construção de indicadores coincidentes mais utilizados da atualidade, desenvolvido pelo The Conference Board (TCB). Esses indicadores buscam detectar mudanças no ciclo econômico de curto prazo. Para isso foi proposta a adição de uma variável que mede a demanda de fretes no cálculo do indicador e uma mudança da metodologia de determinação da relevância (ou peso) de cada variável no indicador. A nova variável é produzida pela Fretebras, uma empresa privada que atua a nível nacional no setor de transporte de cargas. Foram gerados novos indicadores coincidentes com as alterações propostas e comparados com a metodologia atual através de um indicador coincidente de referência. A adição da nova variável permitiu uma melhoria no indicador, bem como a proposta de mudança de metodologia, que neste caso, apresentou impacto mais expressivo na capacidade preditiva do indicador.
This paper seeks to improve the coincident indicator construction method developed by The Conference Board (TCB), one of the most commonly used of the actuality. These indicators seek to detect changes in the short-term economic cycle. In order to do so, it was proposed to add a variable that measures freight demand in the calculation of the indicator and a change in the methodology for determining the relevance (or weight) of each variable in the indicator. The new variable is produced by Fretebras, a private company that operates at the national level in the cargo transportation sector. New coincident indicators with the proposed changes were generated and compared with the current methodology through a benchmark coincident indicator. The addition of the new variable allowed an improvement in the indicator, as well as the proposed change in methodology, which in this case had a more significant impact on the predictive capacity of the indicator.
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Benni, Federica <1979&gt. "Costruzione di un indicatore coincidente per l'analisi del ciclo economico regionale." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/167/.

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Torres, Gabriel Picavêa. "Um índice coincidente para a atividade econômica do comércio varejista no Rio Grande do Sul." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/103974.

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O objetivo deste trabalho é a construção de um indicador coincidente (IC) para a atividade econômica do segmento de Comércio Varejista dentro da economia do estado do Rio Grande do Sul. A utilização de variáveis que apresentem comportamento comum entre si e altamente correlacionado com as Vendas do Varejo é o ponto de partida para a investigação a seguir. A metodologia adotada é a dos modelos de Fator Dinâmico de Stock e Watson (1988, 1989, 1991, 1993). Os resultados encontrados apontam um indicador final satisfatório, em termos de MAPE (erro absoluto percentual médio, em inglês) com relação às séries de Vendas do Varejo, especificamente a série da FEE/Fecomércio-RS – que tratava-se de uma pesquisa censitária. Em termos de fundamentos econômicos o IC é composto por variáveis que sabidamente afetam o consumo de bens: renda, crédito e confiança do consumidor. Um destaque está para o alto peso das variáveis de Crédito e Sentimento sobre a Situação Presente, o que sugere que o fluxo de renda futuro e a confiança para assumir endividamentos longos são determinantes para o segmento. Considerando um horizonte maior para a ampliação dessa pesquisa, postula-se que a construção de novos dados regionalizados para crédito, renda pela PNAD Contínua, séries mais longas para índices de confiança, e indicadores sobre estoques no Comércio podem melhorar os resultados encontrados.
The following research intends to build a coincident indicator to the Retail sector’s economic activity within the regional economy of Rio Grande do Sul. The starting point to reach this objective is to use variables which present common cyclical behavior with each other, as well as with Retail Trade indices. The investigation will be carried on using Stock and Watson’s (1988, 1989, 1991, 1993) Dynamic Factor models methodology. The research returned a result a final index which can be classified as satisfactory, when evaluated by the mean absolute percentage error with Retail Trade indices, specially the FEE/Fecomércio-RS’ index – which was a censitary research. The built Coincident Indicator is composed by variables correlated with consumption, according to the economic theory: income, credit and consumer’s confidence. Variables such as Consumer Credit and Consumer’s Sentiment towards Present Economic Situation presented high weight in the indicator, which suggests that future income flows and confidence to take long term debt are crucial for the sector’s economic activity. Considering an expanded horizon for this research, one believes that new regional data for Household Credit, income through PNAD Contínua, a longer sample for Consumer’s Confidence indices, and indicators measuring stock levels in Retail might improve the coincident indicator.
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Pereira, Ana Regina Nunes. "Multivariate Filtering with Common Factors." Master's thesis, Instituto Superior de Economia e Gestão, 2009. http://hdl.handle.net/10400.5/1148.

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Mestrado em Econometria Aplicada e Previsão
This study discusses four commonly used optimal approximations to the infinite order moving average filter that ideally extracts from a time series fluctuations within a specified range of periodicities. Based on our findings, we use two of those approximations in the estimation of two macroeconomic signals: business cycle fluctuations and medium to long run component of output growth rate. This study dis-tinguishes itself from related literature by showing how to successfully incorporate in the multivariate band-pass approximations factors estimated from a large panel of time series. As illustration, we apply these approximations to U.S. data. We evaluate the real-time performance of the indicators and provide forecasting comparisons. The results suggest that the multivariate indica¬tor outperforms the competing univariate indicator across all different settings considered. Moreover, multivariate methods that target smooth growth are useful to forecast quarterly GDP growth rate at short-term and to forecast yearly GDP growth.
Este estudo discute quatro aproximações óptimas ao filtro de medias moveis infinitas que idealmente isola de uma serie temporal flutuações compreendidas num determinado intervalo de periodicidades. De acordo com as nossas conclusões, utilizamos duas dessas aproximações na estimaçao de dois sinais macroeconómicos: flutuacoes de ciclo economico no produto e a componente de medio e longo prazo da taxa de crescimento do produto. Este estudo distingue-se da literatura corrente ao mostrar como integrar nas aproximacoes do filtro banda multivariado factores estimados a partir de um largo painel de sóeries temporais. Como ilustracao, aplicamos estas aproximacoes a dados dos E.U.A.. Avaliamos o desempenho dos in¬dicadores em tempo real e apresentamos comparacoes em termos de previsao. Os resultados sugerem que o indicador multivariado tem um desempenho claramente superior ao do indicador univariado em todos os cenóarios considerados. Adicionalmente, os móetodos multivariados que aproximam o crescimento alisado sao úteis na previsao da taxa de crescimento trimestral do PIB a curto prazo e para previsao do crescimento anual do PIB.
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李進參. "The Study of Coincident Indicators in Taiwan." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/89095532124714657431.

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Chiang, Yungho, and 江永和. "A Comparison Study of Interest Rate, Exchange Rate, Leading Indicator and Coincident Indicator on Financial Stock Prices in Taiwan." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/10795906673492507901.

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碩士
國立臺北大學
國際財務金融碩士在職專班
99
The main objectives of the study focus upon the impacts of interest rate, exchange rate, leading indicator and coincident indicator on financial stock prices in Taiwan. There are a total of 120 monthly data from January 1, 2001 to December 31, 2010. The research method includes unit root test, Granger causality test and Vector autoregression model (VAR model). The major conclusions are summarized as follows: 1.Based on Granger causality test, leading indicator and coincident indicator cause the stock prices of Cathay Financial Holdings. Coincident indicator and TAIEX total return index cause the stock prices of Yuanta Financial Holdings. Leading indicator and coincident indicator cause the stock prices of Chinatrust Financial Holdings. 2.According to accumulated impulse response function, leading indicator and coincident indicator have significantly positive impacts on the stock prices of Cathay Financial Holdings. Coincident indicator has significantly positive impacts on the stock prices of Yuanta Financial Holdings. Leading indicator and coincident indicator have significantly positive impacts on the stock prices of Chinatrust Financial Holdings. 3.Based on Variance decomposition analysis, 7.51% of Cathay Financial Holdings’ stock prices was explained by leading indicator, while 9.5% was explained by coincident indicator; 5.45% of Yuanta Financial Holdings’ stock prices was explained by coincident indicator; 7.19% of Chinatrust Financial Holdings’ stock prices was explained by leading indicator, while 5.09% was explained by coincident indicator.
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Books on the topic "Coincident indicators"

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Stock, James H. A probability model of the coincident economic indicators. Cambridge, MA: National Bureau of Economic Research, 1988.

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Mongardini, Joannes. Estimating indexes of coincident and leading indicators: An application to Jordan. Washington, D.C: International Monetary Fund, Middle Eastern Department, 2003.

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Gregory, Allan W. Dynamic factor-based coincident and leading indicators of the Malaysian economy. Kingston, Ont.]: Queen's University, John Deutsch Institute for the Study of Economic Policy, 1997.

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Altissimo, Filippo. The Italian business cycle: Coincident and leading indicators and some stylized facts. Roma: Banca d'Italia, 2000.

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Simone, Alejandro. In search of coincident and leading indicators of economic activity in Argentina. [Washington, D.C.]: International Monetary Fund, Western Hemisphere Department, 2001.

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Anirvan, banerji, and Delhi School of Economics. Centre for Development Economics., eds. An index of coincident economic indicators for the Indian economy. [Delhi: Centre for Development Economics, Delhi School of Economics, 2000.

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Matta, Samer. New Coincident and Leading Indicators for the Lebanese Economy. The World Bank, 2014. http://dx.doi.org/10.1596/1813-9450-6950.

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Filippo, Altissimo, ed. The construction of coincident and leading indicators for the euro area business cycle. Roma: Banca d'Italia, 2001.

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Filippo, Altissimo, ed. A real time coincident indicator of the Euro area business cycle. Rome: Banca D'Italia, 2001.

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Rondinone, Troy. “The Regular Friday Coaxial Bloodbath”. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252037375.003.0003.

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This chapter discusses the historical and cultural factors that shaped the rise of TV boxing. It suggests that Cold War hypermasculinity combined with lived war memories to provided a potent cultural milieu in which boxing found a comfortable place. Though it is difficult to prove that war “made” TV boxing popular, a few facts suggest linkages. This was truly a generation of soldiers. An astounding 80 percent of the men born in the 1920s became veterans. It is entirely possible that this unprecedented wave of warriors coincided with the absolute height of boxing viewing in America is sheer coincidence. But this fact, combined with much anecdotal evidence and a cultural backdrop of gunslinging violence, indicates a connection. Whether it was the cover story of Life magazine featuring a five-year-old “fleaweight” boxer, the enthusiastic core of veterans who watched the fights, or the ongoing dialogue about women and the “caveman” allure, boxing and war experience cannot easily be separated.
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Book chapters on the topic "Coincident indicators"

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Campelo, Aloisio, Ataman Ozyildirim, Jing Sima-Friedman, Paulo Picchetti, and Sarah Piassi Machado Lima. "Coincident and Leading Indicators for Brazilian Cycles." In Societies and Political Orders in Transition, 315–29. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-90017-9_18.

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Dash, Atish Kumar, Ataman Ozyildirim, and Jing Sima-Friedman. "An Application of the Indicator Approach to Developing Coincident and Leading Economic Indexes for India." In Societies and Political Orders in Transition, 377–92. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-90017-9_23.

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Kirchhelle, Claas. "Slippery FACTs: The Rise of a “mandated” Animal Welfare Science." In Palgrave Studies in the History of Social Movements, 175–202. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-62792-8_10.

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AbstractThis chapter assesses the growing importance and institutionalisation of animal welfare science after 1965. It also analyses the science’s status as a “mandated discipline” tasked with establishing welfare definitions and evaluating production systems. The institutionalisation of welfare science benefited from new official funding streams and sponsorship from non-governmental bodies like the RSPCA and Ruth Harrison’s FACT. Although early hopes for universal welfare indicators were disappointed, three distinct welfare approaches emerged: (1) a first approach evaluated classic physiological indicators of animals’ basic health and biological functioning, (2) a second approach employed a mix of physiological and behavioural methods to study how animals cope with farm environments, and (3) a third approach focused on the “naturalness” of different production systems. Disagreements over how to weight welfare factors coincided with challenges to scientists’ authority by animal rights campaigners. Scientists also faced the challenge of meeting funder expectations without compromising research integrity.
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"Coincident Indicators." In The Trader's Guide to The Euro Area, 27–34. United Kingdom: John Wiley & Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118744369.ch3.

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"Leading, Coincident, and Lagging Indexes." In Guide to Economic Indicators, 191–97. Routledge, 2015. http://dx.doi.org/10.4324/9781315703916-41.

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Stock, James H., and Mark W. Warson. "A probability model of the coincident economic indicators." In Leading Economic Indicators, 63–90. Cambridge University Press, 1991. http://dx.doi.org/10.1017/cbo9781139173735.005.

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"Indexes of Leading, Lagging, and Coincident Indicators." In The Trader's Guide to Key Economic Indicators, 47–63. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118532461.ch2.

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Rangvid, Jesper. "Judging the stance of the business cycle." In From Main Street to Wall Street, 222–40. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198866404.003.0015.

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This chapter describes if and how we can detect business-cycle turning points. What variables should we study if we want to say something about the likelihood that the business cycle will change? The chapter discusses business-cycle ‘indicators’. It distinguishes between lagging, coincident, and leading indicators. Lagging indicators refer to economic variables that react to a change in the business cycle, i.e. variables that react after a business-cycle turning point. Coincident indicators tell us something about where we are right now in the business cycle. Leading indicators, which are probably the most important ones, tell us about the near-term outlook for the business cycle, i.e. forecast the business cycle. The chapter emphasizes that business-cycle turning points are hard to predict, but also that some indicators are more informative than others.
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Lahiri, Kajal. "Chapter 4 TSI as a Part of the Coincident Indicators System." In Transportation Indicators and Business Cycles, 83–116. Emerald Group Publishing Limited, 2010. http://dx.doi.org/10.1108/s0573-8555(2010)0000289006.

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Lahiri, Kajal. "Chapter 2 Composite Coincident Index of the Transportation Sector and Its Linkages to the Economy." In Transportation Indicators and Business Cycles, 39–56. Emerald Group Publishing Limited, 2010. http://dx.doi.org/10.1108/s0573-8555(2010)0000289004.

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Conference papers on the topic "Coincident indicators"

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TRUKHACHEV, Vladimir, Sergey OLEYNIK, and Nikolay ZLYDNEV. "DAILY DYNAMICS OF MILK QUALITY INDICATORS." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.067.

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Dairy cattle breeding is one of the main suppliers of protein and animal fat, it is one of the most important branches of agriculture and plays a primary role in providing adequate nutrition for the population. During the purposeful work on harmonization of the national regulatory framework with international legislation, special attention is paid to scientific developments in the way of full implementation of Russian livestock production in the global trading system. The recommendations of the International Committee for Registration of Animals (ICAR) (Global Standard…, 2017; Trukhachev et al., 2017) are the methodological basis for the introduction of the generally accepted organizational principles for the recording and evaluation of the productive qualities of animals. One of the stages of this process was implementation in 2015-2017. in the Stavropol State Agrarian University of research projects, especially significant for the agro-industrial complex of the Russian Federation in the direction of ensuring import substitution in animal husbandry (genetic material), which envisage the development of a regional model for the formation and management of highly productive genetic resources for dairy cattle. The object of the research was cattle (cows) of the North Caucasian population of the Ayrshire breed (n = 550), from which, based on the analysis of the materials of the primary zooveterinary records, groups of cows with 3-fold milking were formed to study the daily dynamics of fat and protein content in raw milk samples I, II and III milking, n = 240) and 2-fold milking (I and II milking - 180 cows). In the process of performing monthly analyzes of the quality of individual milk samples obtained from pedigree cows taken for 2- or 3-fold milking, it was found that a certain pattern is observed in the diurnal dynamics of fat and protein content in milk, which probably has a general biological nature and largely depends on the technological factor - the multiplicity of milking cows, which coincides, basically, with the regularities described in the methodology of the International Committee for Registration of Animals (ICAR). The nature of the dynamics of the concentration of fat in milk at 2- and 3-fold milking has, though a different mathematical form, but they have a general tendency: the fat in milk for milking cows, as a rule, is 10.77–10.98 % lower, than II and III milking. The variability of the protein concentration in milk during the day is the same as the fat dynamics, though it is less expressed than of fat and accounts 0.88%.
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Chen, Ning-Xin, and Shin-Min Song. "Direct Position Analysis of the 4-6 Stewart Platforms." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0200.

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Abstract Although Stewart platforms have been applied in the designs of aricraft and vehicle simulators and parallel robots in many years, their closed-form solution of direct (forward) position analysis has not been completely solved. Up to the present time, only the relatively simple Stewart platforms have been analyzed. Examples are the octahedral Stewart and the 4-4 Stewart platforms, in which two pairs of both upper and lower joint centers are coincident. The former results in in an eighth degree polynomial and the latter results in an eighth and a twelfth degree polynomials for different cases. The single unknown variable is in the form of square of a tan-half-angle. This paper further extends the direct position analysis to a more genearl case of the Stewart platform, the 4-6 Stewart platforms, in which two pairs of upper joint centers of adjacent limbs are coincident. The result is a sixteenth degree polynomial in the square of a tan-half-angle, which indicates that a maximum of 32 configurations may be obtained. It is also shown that the previously derived solutions of 4-4 and and 3-6 Stewart platforms can be easily deduced from the sixteenth degree polynomial by setting some geometric parameters be equal to 1 or 0.
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Finnegan, Shane Leslie, Craig Meskell, and Samir Ziada. "The Effect of Sound Pressure on the Aeroacoustic Sources Around Two Ducted Tandem Cylinders." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30271.

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An empirical investigation of the spatial distribution of aeroacoustic sources around two tandem cylinders subject to ducted flow and forced transverse acoustic resonance is described. The work builds on a previous investigation by the authors and utilises Howe’s theory of aerodynamic sound. The influence of the sound pressure level in the duct on the strength and location of the aeroacoustic sources in the flow was the main focus of the investigation and experiments to resolve the aeroacoustic source distribution were concentrated at a low main-stream flow velocity (before acoustic-Strouhal coincidence), at a medium mainstream flow velocity (just after acoustic-Strouhal coincidence) and at a high mainstream flow velocity (substantially higher than acoustic-Strouhal coincidence). The sound pressure level was found to have a considerable effect on the “lock-in”’ range of the cylinders which widened as the sound pressure level increased. A proposed normalisation of the net acoustic energy transfer per spanwise location appears to show good metric for the distribution of the aeroacoustic sources in the flow field. Using this, it was found that the amplitude of the sound pressure had a negligible influence on the aeroacoustic sources in the wake and the gap region for all the tested cases apart from the lowest flow velocity. This particular case showed indications that the aeroacoustic source strength and location could be altered for certain changes in sound pressure level.
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Fan, Chen-Chao, Jhe-Wei Syu, Min-Chun Pan, and Wen-Chang Tsao. "Study of Start-Up Vibration Response for Oil Whip and Dry Whip Through Hilbert Huang Transform." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48818.

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Oil whip induces self-excited vibration in fluid-handling machines, and what is worse, it can cause self-excited reverse precessional full annular rub, known as “dry whip” which is a secondary phenomenon resulting from a primary cause and may lead to a catastrophic failure of machines; that is, “coincidence of oil whip and dry whip” that occurs repeatedly with constant frequency and amplitude in small clearance cases of fluid-handling machines. Early detection of rub malfunction is essential to avoid damage. Hilbert Huang Transform, which included an empirical mode decomposition and Hilbert spectral analysis, is applied. Hilbert Huang Transform is a great method for analyzing non-linear and non-stationary signals, such as rotor startup signals. Hilbert Huang Transform clearly indicates instability at its initiation stage, and energy concentration changes by different stages. Malfunctions like rub can not observe by Hilbert spectrum. Hilbert spectrum combining full spectrum is developed, as know full Hilbert spectrum, to interpret the rub. The coincidence of oil whip and dry whip is observed definitely through FHS. The advantage of the full Hilbert spectrum is to offer a faster, more efficient method to diagnose fluid-induced instability.
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5

Oakes, William C., Patrick B. Lawless, and Sanford Fleeter. "Instability Pathology of a High Speed Centrifugal Compressor." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-415.

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An experimental investigation is performed to characterize a high-speed centrifugal compressor as it approaches instability and during subsequent surge cycles. To achieve this, data are analyzed from the inlet, the diffuser and the exit of the compressor. Analysis of the data indicates the presence of two rotating stall modes prior to and during surge cycles. A nine cell mode pattern is shown to erupt prior to the initial surge cycle. The second rotating stall mode is a single cell mode that coincides with the initiation of the surge cycles. Both stall modes are shown to be located at or near the diffuser.
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6

Scholte Mendoza, Paola, Steven Bott, and Yvan Hubert. "Shear-Wave Ultrasonic Crack Inspection Tool Performance for Cracks Associated With Metal Loss." In 2016 11th International Pipeline Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ipc2016-64429.

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Shear-wave ultrasonic in-line tools are used for crack management in liquids pipelines. An ultrasonic pulse is generated, travels in the pipe wall and reflects on axially oriented artifacts that could be geometric or crack-like in nature. If several geometrical artifacts are present, detection and sizing efficiency of these ultrasonic inspection tools could be reduced. Cracking located within corrosion is one possible interacting set of geometrical artifacts that could affect in-line inspection (ILI) performance. As part of continuous improvement, a comprehensive review of two thousand three hundred and thirty eight in-the-ditch measurements of cracking in corrosion were compared to crack ILI reported features in order to determine the tool performance in cases where cracks were associated with metal loss. Relationships of depth and predicted burst pressures were reviewed and compared to cracks not associated with metal loss. Additionally, field NDE results that had incomplete information in the ILI-NDE correlation files with indications of being potential defects were reviewed to examine the possibility of undocumented coincident cracking in metal loss that could represent an integrity threat. This paper summarizes the results and potential implications for management of cracking in corrosion using shear-wave ultrasonic crack ILI.
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7

Skvorcova, Olga, Anna Stavicka, and Indra Odiņa. "Subjective Well-Being of International Students in Latvian Higher Education Institutions." In 78th International Scientific Conference of University of Latvia. University of Latvia, 2020. http://dx.doi.org/10.22364/htqe.2020.18.

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Students’ well-being and life satisfaction have been the crucial trends in research and practice over the last decades. Often students, who come to study to another country encounter several challenges in the process of integration in the new host country environment. The article deals with the part of the broader research which aimed at fostering international students’ integration in the environment of the host country – Latvia. The aim of this article is to explore international students’ satisfaction as well as the problems they have encountered in Latvian higher education institutions and thus find out the level of their subjective well-being according to Ryff’s (1989) stated indicators: autonomy, environmental mastery, personal growth, positive relations with others, purpose in life, and self-acceptance. The data reveal the average score 5.6 out of highest score 7 and the highest scores are for self-acceptance and positive relations with others. The research also coincided with the beginning of the outbreak of COVID-19 pandemic, thus influencing the number of respondents and representation of the countries in the research sample. The research was conducted in the framework of the project “Multilingual and Multicultural University: Preparation Platform for Prospective International Students” (No. 1.1.1.2/ VIAA/1/16/019) co-funded by ERDF.
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8

Chen, Liu, Cao Yipeng, Sun Wenjian, Zhang Wenping, Ming Pingjian, and Lin Guang. "Study on the Simulation Method of Compressor Aerodynamic Noise Based on CFD and IBEM." In ASME 2016 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icef2016-9420.

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Turbocharger compressor aerodynamic noise has been one of the major noise sources of diesel engine. It is necessary to study the characteristics of turbocharger fluid flow and radiation noise for its effective noise control. In this paper, a new for predicting compressor aerodynamic noise is presented, which combined the computational fluid dynamic (CFD) and indirect boundary element method (IBEM). The unsteady viscous flow in compressor was simulated based on the finite volume method. In addition, the periodic pressure fluctuation of the rotor inlet and blades were used to compressor radiation noise field simulation by indirect boundary element method. In order to prove the feasibility of numerical simulation, the acoustics experimental device for compressor aerodynamic noise experiment was built and the sound pressure of turbocharger were tested. The trend of simulation results and amplitude level in blade passing frequency (BPF) coincide with the experiment results. It indicates that the coupling method is more effective and accurate in turbocharger noise prediction.
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Torres, Luis, Geoff Vignal, Kaitlyn Korol, Jeffrey Sutherland, and Stephan Tappert. "Detection of Crack-Related Features Within Dented Pipe Using Electromagnetic Acoustic Transduction (EMAT) Technology." In 2016 11th International Pipeline Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ipc2016-64216.

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Mechanical damage has been identified as a significant integrity threat within the Oil & Gas pipeline industry. In addition to deformation, associated secondary pipeline damage may also consist of coating removal, metal removal and cold working of the underlying metal that may result in cracking within the dented area. Detection of cracks within dented areas of the pipe using conventional Ultrasonic Technology (UT) and Magnetic Flux Leakage (MFL) In-line Inspection (ILI) technologies has been of limited success due to the variety of possible feature expressions, sensor design and arrangements, and the related complexity within the underlying physics for detection and characterization. Previous studies have shown the feasibility of Electro Magnetic Acoustic Transduction (EMAT) technology for detecting and characterizing crack related indications within dents on liquid pipelines. This study expands upon experimental investigations using pull through ILI tests on manufactured dents where machined linear indications (notches) were introduced into the dents. In this paper, the performance of EMAT technology for detection and characterization of crack related features in liquids pipelines under real operating conditions is presented. EMAT data were combined with high resolution caliper data, ultrasonic crack inspection data and dent strain assessment data, to demonstrate the EMAT capabilities to enhance pipeline integrity management of dents. Results of field non-destructive examinations are compared to EMAT predicted values to assess the performance of this technology. This study presents a supplementary method of detecting and mitigating coincidental crack related features with dents on liquids pipelines, further enhancing the safety and improving the integrity management of pipelines.
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10

Ren, Bo, Jerry Jensen, Larry Lake, Ian Duncan, and Frank Male. "Analysis of Vertical Permeability and Its Influence on CO2 EOR and Storage in a Carbonate Reservoir." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205995-ms.

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Abstract The objective of this study is to improve understanding of the geostatistics of vertical (bed-normal) permeability (kz) and its influence on reservoir performance during CO2 enhanced oil recovery (EOR) and storage. kz is scrutinized far less often than horizontal permeability (kx, ky) in most geological and reservoir modeling. However, our work indicates that it is equally important to understand kz characteristics to better evaluate their influence on CO2 EOR and storage performance prediction. We conducted this study on about 9,000 whole-core triaxial permeability (kx, ky, kz) measurements from 42 wells in a San Andres carbonate reservoir. We analyzed kz data, including heterogeneity, correlation, and sample sufficiency measures. We analyzed wells with the largest and smallest fractions of points with kz &gt; kmax = max(kx, ky), to explore geological factors that coincided with large kz. We quantified these geological effects through conditional probabilities on potential permeability barriers (e.g., stylolites). Every well had at least some whole-cores where kz &gt; kmax. This is a statistically justifiable result; only where Prob(kz &gt; kmax) is statistically different from 1/3 are core samples non-isotropic. In conventional core data interpretation, however, modelers usually assume kz is less than kmax. For the well with the smallest fraction (11%) of cores where kz &gt; kmax, the cumulative distribution functions differ and coincides with the presence of stylolites. We found that kz is about twice as variable as kx in many wells. This makes kz more difficult to interpret because it was (and usually is) heavily undersampled. To understand the influence of kz heterogeneity on CO2 flow, we built a series of flow simulation models that captured these geostatistical characteristics of permeability, while considering kz realizations, flow regimes (e.g., buoyant flow), CO2 injection strategies, and reservoir heterogeneity. CO2 flow simulations showed that, for viscous flow, assuming variable kx similar to the reservoir along with a constant kz/kx = 0.1 yields a close (within 0.5%) cumulative oil production to the simulation case with both kx and kz as uncorrelated variables. However, for buoyant flow, oil production differs by 10% (at 2.0 hydrocarbon pore volume HCPV of CO2 injected) between the two cases. Such flows could occur for small CO2 injection rates and long injection times, in interwell regions, and/or with vertically permeable conduits. Our geostatistical characterization demonstrates the controls on kz in a carbonate reservoir and how to improve conventional interpretation practices. This study can help CO2 EOR and storage operators refine injection development programs, particularly for reservoirs where buoyant flow exists. More broadly, the findings potentially apply to other similar subsurface buoyancy-driven flow displacements, including hydrogen storage, geothermal production, and aquifer CO2 sequestration.
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Reports on the topic "Coincident indicators"

1

Stock, James, and Mark Watson. A Probability Model of The Coincident Economic Indicators. Cambridge, MA: National Bureau of Economic Research, November 1988. http://dx.doi.org/10.3386/w2772.

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2

Financial Stability Report - Second Semester of 2020. Banco de la República de Colombia, March 2021. http://dx.doi.org/10.32468/rept-estab-fin.sem2.eng-2020.

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The Colombian financial system has not suffered major structural disruptions during these months of deep economic contraction and has continued to carry out its basic functions as usual, thus facilitating the economy's response to extreme conditions. This is the result of the soundness of financial institutions at the beginning of the crisis, which was reflected in high liquidity and capital adequacy indicators as well as in the timely response of various authorities. Banco de la República lowered its policy interest rates 250 points to 1.75%, the lowest level since the creation of the new independent bank in 1991, and provided ample temporary and permanent liquidity in both pesos and foreign currency. The Office of the Financial Superintendent of Colombia, in turn, adopted prudential measures to facilitate changes in the conditions for loans in effect and temporary rules for rating and loan-loss provisions. Finally, the national government expanded the transfers as well as the guaranteed credit programs for the economy. The supply of real credit (i.e. discounting inflation) in the economy is 4% higher today than it was 12 months ago with especially marked growth in the housing (5.6%) and commercial (4.7%) loan portfolios (2.3% in consumer and -0.1% in microloans), but there have been significant changes over time. During the first few months of the quarantine, firms increased their demands for liquidity sharply while consumers reduced theirs. Since then, the growth of credit to firms has tended to slow down, while consumer and housing credit has grown. The financial system has responded satisfactorily to the changes in the respective demands of each group or sector and loans may grow at high rates in 2021 if GDP grows at rates close to 4.6% as the technical staff at the Bank expects; but the forecasts are highly uncertain. After the strict quarantine implemented by authorities in Colombia, the turmoil seen in March and early April, which was evident in the sudden reddening of macroeconomic variables on the risk heatmap in Graph A,[1] and the drop in crude oil and coal prices (note the high volatility registered in market risk for the region on Graph A) the local financial markets stabilized relatively quickly. Banco de la República’s credible and sustained policy response played a decisive role in this stabilization in terms of liquidity provision through a sharp expansion of repo operations (and changes in amounts, terms, counterparties, and eligible instruments), the purchases of public and private debt, and the reduction in bank reserve requirements. In this respect, there is now abundant aggregate liquidity and significant improvements in the liquidity position of investment funds. In this context, the main vulnerability factor for financial stability in the short term is still the high degree of uncertainty surrounding loan quality. First, the future trajectory of the number of people infected and deceased by the virus and the possible need for additional health measures is uncertain. For that reason, there is also uncertainty about the path for economic recovery in the short and medium term. Second, the degree to which the current shock will be reflected in loan quality once the risk materializes in banks’ financial statements is uncertain. For the time being, the credit risk heatmap (Graph B) indicates that non-performing and risky loans have not shown major deterioration, but past experience indicates that periods of sharp economic slowdown eventually tend to coincide with rises in non-performing loans: the calculations included in this report suggest that the impact of the recession on credit quality could be significant in the short term. This is particularly worrying since the profitability of credit establishments has been declining in recent months, and this could affect their ability to provide credit to the real sector of the economy. In order to adopt a forward-looking approach to this vulnerability, this Report presents several stress tests that evaluate the resilience of the liquidity and capital adequacy of credit institutions and investment funds in the event of a hypothetical scenario that seeks to simulate an extreme version of current macroeconomic conditions. The results suggest that even though there could be strong impacts on the credit institutions’ volume of credit and profitability under such scenarios, aggregate indicators of total and core capital adequacy will probably remain at levels that are above the regulatory limits over the horizon of a year. At the same time, the exercises highlight the high capacity of the system's liquidity to face adverse scenarios. In compliance with its constitutional objectives and in coordination with the financial system's security network, Banco de la República will continue to closely monitor the outlook for financial stability at this juncture and will make the decisions that are necessary to ensure the proper functioning of the economy, facilitate the flow of sufficient credit and liquidity resources, and further the smooth operation of the payment systems. Juan José Echavarría Governor
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