559 research outputs found
Data set supporting the paper by Deanna Rose, Malcolm D Hudson, Sargent Bray, Pawel Gaca: "Assessment of the estuarine shoreline microplastics of the River Itchen, Southampton (UK) for contaminants and for their ingestion by invertebrate fauna".
No full textData set supporting the paper by Deanna Rose, Malcolm D Hudson, Sargent Bray, Pawel Gaca: "Assessment of the estuarine shoreline microplastics of the River Itchen, Southampton (UK) for contaminants and for their ingestion by invertebrate fauna".
The dataset relates to the field and laboratory work assessing microplastic contamination and impacts on the Itchen Estuary, Hampshire UK, 2021</span
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Correspondence
No full textThe top portion of the Sargent Colors catalog sent by Walter Bray to Carl B. Compton about advertising in The Texas Art Teacher magazine
Assessment of the estuarine shoreline microplastics and mesoplastics of the River Itchen, Southampton (UK) for contaminants and for their interaction with invertebrate fauna
No full textThe presence of shoreline microplastics (1–5 mm) and mesoplastics (5–25 mm) in estuarine ecosystems is ubiquitous, but there remains little data on their composition, contamination status and ecological impacts. Chessel Bay Nature Reserve, situated in the internationally protected Itchen Estuary in Southampton, UK, has serious issues with shoreline plastic accumulation. In evaluating potentially adverse ecological impacts, the influence of quantities of shoreline microplastic (mp) and mesoplastic (MeP) material and adsorbed contaminants (PAHs and trace metals) on the biometrics and population dynamics of the burrowing supralittoral amphipod, Orchestia gammarellus, was assessed in this study. mp/MeP concentrations were variable in surface (0–42%: 0–422,640 mg/kg dry sediment) and subsurface horizons (0.001–10%: 11—97,797 mg/kg dry sediment). Secondary microplastics accounted for 77% of the total microplastic load (dominated by fragments and foams), but also comprised 23% nurdles/pellets (primary microplastics). Sorption mechanisms between contaminants and natural sediments were proposed to be the main contributor to the retention of PAHs and trace metal contaminants and less so, by mp/MeP. O. gammarellus populations showed a positive correlation with microplastic concentrations (Spearman correlation, R = 0.665, p = 0.036). Some reported toxicological thresholds were exceeded in sediments, but no impacts related to chemical contaminant concentrations were demonstrated. This study highlights a protected site with the severe plastic contamination, and the difficulty in demonstrating in situ ecotoxicological impacts
Dataset in support of the thesis: Ocean to plate: Tracing the geographic origin of fish products using biochemical forensic techniques
No full textThis dataset contains all research data collected for the PhD thesis entitled 'Ocean to plate: Tracing the geographic origin of fish products using biochemical forensic techniques'. It consists of biochemical data measured in muscle tissue of Atlantic cod, haddock and European hake collected from a range of regions in the Northeast Atlantic Ocean in 2018, as well as in European glass eels collected from four European rivers. Data includes stable isotope ratios, fatty acid compositions and trace element compositions measured by x-ray fluorescence (XRF).</span
El pseudokeynesianismo de Sargent Sargent' s Pseudo-Keynesianism
No full textLos supuestos del modelo Sargent garantizan la estabilidad dentro de un marco muy restrictivo que deja por fuera las consideraciones teóricas fundamentales. El artículo intenta mostrar que: 1/ La lógica agregativa del modelo no sólo niega la esencia del análisis macroeconómico keynesiano sino que, además, no logra superar el viejo problema de cómo pasar rigurosamente de las relaciones entre individuos a las interacciones globales entre agentes económicos; 2/ Las conclusiones de política económica que Sargent presenta como universalmente validas se derivan de supuestos y condiciones muy restrictivos. Este autor pasa por alto otras situaciones que, siendo igualmente factibles, llevan a resultados matemáticos y a recomendaciones de política totalmente diferentes a los suyos.The assumptions of the Sargent model guarantee stabili ty wi thin avery limited framework which omits basic theoretical considerations.The article tries to show that (1) aggregate logic of the model notonly denies the essence of Keynesian macroeconomic analysis, but alsodoes not solve the old problem of how to pass from the relationshipbetween individuals to global interactions between forces in theeconomy; and (2) Sargent's conclusions on economic policy arepresented as universally valid, but are derived from highly restrictiveassumptions and conditions. The author ignores other situationswhich are equally likely to occur, but would give mathematicalresults and policy recommendations totally different from those ofthe author
El pseudokeynesianismo de Sargent
No full textThe assumptions of the Sargent model guarantee stabili ty wi thin avery limited framework which omits basic theoretical considerations.The article tries to show that (1) aggregate logic of the model notonly denies the essence of Keynesian macroeconomic analysis, but alsodoes not solve the old problem of how to pass from the relationshipbetween individuals to global interactions between forces in theeconomy; and (2) Sargent\u27s conclusions on economic policy arepresented as universally valid, but are derived from highly restrictiveassumptions and conditions. The author ignores other situationswhich are equally likely to occur, but would give mathematicalresults and policy recommendations totally different from those ofthe author.Los supuestos del modelo Sargent garantizan la estabilidad dentro de un marco muy restrictivo que deja por fuera las consideraciones teóricas fundamentales. El artículo intenta mostrar que: 1/ La lógica agregativa del modelo no sólo niega la esencia del análisis macroeconómico keynesiano sino que, además, no logra superar el viejo problema de cómo pasar rigurosamente de las relaciones entre individuos a las interacciones globales entre agentes económicos; 2/ Las conclusiones de política económica que Sargent presenta como universalmente validas se derivan de supuestos y condiciones muy restrictivos. Este autor pasa por alto otras situaciones que, siendo igualmente factibles, llevan a resultados matemáticos y a recomendaciones de política totalmente diferentes a los suyos
Irene Sargent: A Comprehensive Bibliography of Her Published Writings
No full textIrene Sargent (1852-1932), professor of the History of Fine Arts at Syracuse University from 1895 to 1932, was the subject of an article by the author in The Courier, XVI, 2 (Summer 1979), Irene Sargent: Rediscovering a Lost Legend. A leading art historian of her day, Irene Sargent wrote extensively for The Craftsman and The Keystone and contributed as well to other periodicals. Dr. Sargent\u27s articles merit close study as documents of the development of the Arts and Crafts Movement in America. Her work contributed to the growth of an appreciation of native accomplishments in the arts, including the fine crafts, and an understanding of the historical antecedents of those accomplishments. A number of her articles are translations of contemporary European articles, selected to keep her American readers current in matters of European taste.
Because of their historical interest, the articles in this bibliography are listed in chronological order. for each periodical in which her work appeared
El pseudokeynesianismo de Sargent
No full textThe assumptions of the Sargent model guarantee stabili ty wi thin avery limited framework which omits basic theoretical considerations.The article tries to show that (1) aggregate logic of the model notonly denies the essence of Keynesian macroeconomic analysis, but alsodoes not solve the old problem of how to pass from the relationshipbetween individuals to global interactions between forces in theeconomy; and (2) Sargent's conclusions on economic policy arepresented as universally valid, but are derived from highly restrictiveassumptions and conditions. The author ignores other situationswhich are equally likely to occur, but would give mathematicalresults and policy recommendations totally different from those ofthe author.Los supuestos del modelo Sargent garantizan la estabilidad dentro de un marco muy restrictivo que deja por fuera las consideraciones teóricas fundamentales. El artículo intenta mostrar que: 1/ La lógica agregativa del modelo no sólo niega la esencia del análisis macroeconómico keynesiano sino que, además, no logra superar el viejo problema de cómo pasar rigurosamente de las relaciones entre individuos a las interacciones globales entre agentes económicos; 2/ Las conclusiones de política económica que Sargent presenta como universalmente validas se derivan de supuestos y condiciones muy restrictivos. Este autor pasa por alto otras situaciones que, siendo igualmente factibles, llevan a resultados matemáticos y a recomendaciones de política totalmente diferentes a los suyos
Drifts and volatilities: monetary policies and outcomes in the post WWII U.S.
No full textFor a VAR with drifting coefficients and stochastic volatilities, the authors present posterior densities for several objects that are of interest for designing and evaluating monetary policy. These include measures of inflation persistence, the natural rate of unemployment, a core rate of inflation, and "activism coefficients" for monetary policy rules. Their posteriors imply substantial variation of all of these objects for post WWII U.S. data. After adjusting for changes in volatility, persistence of inflation increases during the 1970s then falls in the 1980s and 1990s. Innovation variances change systematically, being substantially larger in the late 1970s than during other times. Measures of uncertainty about core inflation and the degree of persistence covary positively. The authors use their posterior distributions to evaluate the power of several tests that have been used to test the null of time-invariance of autoregressive coefficients of VARs against the alternative of time-varying coefficients. Except for one test, they find that those tests have low power against the form of time variation captured by our model. That one test also rejects time invariance in the data.Equilibrium (Economics) ; Monetary policy ; Macroeconomics ; Inflation (Finance) ; Forecasting
Dynamics of Beliefs and Learning Under aL Processes - The Heterogeneous Case
No full textThis paper studies a class of models in which agents' expectations influence the actual dynamics while the expectations themselves are the outcome of some recursive processes with bounded memory. Under the assumptions of heterogeneous expectations (or beliefs) and that the agents update their expectations by recursive L- and general aL-processes, the dynamics of the resulting expectations and learning schemes are analyzed. It is shown that the dynamics of the system, including stability, instability and bifurcation, are affected differently by the recursive processes. The cobweb model with a simple heterogeneous expectation scheme is employed as an example to illustrate the stability results, the various types of bifurcations and the routes to complicated price dynamics. In particular, the double edged effect of heterogeneity on the dynamics of the model is demonstrated.heterogeneous beliefs; recursive L-process; general aL-process; stability; instability; bifucation; cobweb model
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