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Search Results: 1 - 10 of 1498 matches for " Evan Linde "
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Climate Change Impact on Wheat Production in the Southern Great Plains of the US Using Downscaled Climate Data  [PDF]
Kundan Dhakal, Vijaya Gopal Kakani, Evan Linde
Atmospheric and Climate Sciences (ACS) , 2018, DOI: 10.4236/acs.2018.82011
Abstract: Gradually developing climatic and weather anomalies due to increasing concentration of atmospheric greenhouse gases can pose threat to farmers and resource managers. There is a growing need to quantify the effects of rising temperature and changing climates on crop yield and assess impact at a finer scale so that specific adaptation strategies pertinent to that location can be developed. Our work aims to quantify and evaluate the influence of future climate anomalies on winter wheat (Triticum aestivum L.) yield under the Representative Concentration Pathways 6.0 and 8.5 using downscaled climate projections from different General Circulation Models (GCMs) and their ensemble. Marksim downscaled daily data of maximum (TMax) and minimum (TMin) air temperature, rainfall, and solar radiation (SRAD) from different Coupled Model Intercomparison Project GCMs (CMIP5 GCMs) were used to simulate the wheat yield in water and nitrogen limiting and non-limiting conditions for the future period of 2040-2060. The potential impact of climate changes on winter wheat production across Oklahoma was investigated. Climate change predictions by the downscaled GCMs suggested increase in air temperature and decrease in total annual rainfall. This will be really critical in a rainfed and semi-arid agro-ecological region of Oklahoma. Predicted average wheat yield during 2040-2060 increased under projected climate change, compared with the baseline years 1980-2014. Our results indicate that downscaled GCMs can be applied for climate projection scenarios for future regional crop yield assessment.
Topological Defects as Seeds for Eternal Inflation
Andrei Linde,Dmitri Linde
Physics , 1994, DOI: 10.1103/PhysRevD.50.2456
Abstract: We investigate the global structure of inflationary universe both by analytical methods and by computer simulations of stochastic processes in the early Universe. We show that the global structure of the universe depends crucially on the mechanism of inflation. In the simplest models of chaotic inflation the Universe looks like a sea of thermalized phase surrounding permanently self-reproducing inflationary domains. In the theories where inflation occurs near a local extremum of the effective potential corresponding to a metastable state, the Universe looks like de Sitter space surrounding islands of thermalized phase. A similar picture appears even if the state $\phi = 0$ is unstable but the effective potential has a discrete symmetry $\phi \to =-\phi$. In this case the Universe becomes divided into domains containing different phases. These domains will be separated from each other by domain walls. However, unlike ordinary domain walls, these domain walls will inflate, and their thickness will exponentially grow. In the theories with continuous symmetries inflation generates exponentially expanding strings and monopoles surrounded by thermalized phase. Inflating topological defects will be stable, and they will unceasingly produce new inflating topological defects. This means that topological defects may play a role of indestructible seeds for eternal inflation.
Towards a gauge invariant volume-weighted probability measure for eternal inflation
Linde, Andrei
High Energy Physics - Phenomenology , 2007, DOI: 10.1088/1475-7516/2007/06/017
Abstract: An improved volume-weighted probability measure for eternal inflation is proposed. For the models studied in this paper it leads to simple and intuitively expected gauge-invariant results.
Inflationary Cosmology
Linde, Andrei
High Energy Physics - Phenomenology , 2007, DOI: 10.1007/978-3-540-74353-8_1
Abstract: I give a general review of the history of inflationary cosmology and of its present status.
The Other in Italian Postcolonial Cinema. Pasolini and Fellini: Two Case Studies
Linde Luijnenburg
Incontri : Rivista Europea di Studi Italiani , 2013,
Abstract: In questo articolo si illustra, alla luce di due film, come Pier Paolo Pasolini e FedericoFellini abbiano cercato di mettere in discussione il silenzio sul passato colonialeitaliano, in un periodo in cui gli anni Sessanta e Settanta il dibattito sulcolonialismo era molto acceso nella cultura europea. Nelle opere analizzate nel presente contributo, i due artisti, facendo ricorso al proprio inconfondibile stile, affrontano criticamente i pregiudizi e gli stereotipi ancora esistenti nella società italiana. In Appunti per un’Orestiade africana (1968-1970), Pasolini definisce l’Altro ancora partendo da una prospettiva occidentale, sebbene egli riconosca che le problemiche nascono da uno sguardo ‘binario’ sull’Africa, cioè da un pensiero che articola la realtà secondo categorie estreme, opposte e inconciliabili. Anche Fellini in Amarcord (1973) decostruisce il pensiero sull’Altro partendo dall’opposizione di concettiantitetici; egli ridicolizza più volte nel film quel modo di pensare orientalista edimostra inoltre che il vero pericolo, ossia il vero ‘Altro’, viene piuttosto dall’internodel paese. Riconoscendo la parte ‘fascista’ o adolescente della società e smettendodi dare la colpa ‘agli altri’, gli italiani potrebbero per Fellini finalmente venire a patti con se stessi e con la loro storia (coloniale) recente. Come si suggerisce nel contributo, i due film analizzati non costituiscono delle eccezioni, ma anticipano una riflessione sul colonialismo italiano presente anche in altre pellicole che attendono di essere adeguatamente studiate.
Voices on Italy’s Recent History: Aulò: Roma postcoloniale and La quarta via
Linde Luijnenburg
Incontri : Rivista Europea di Studi Italiani , 2013,
Abstract: Recensione di: Simone Brioni (ed.), Somalitalia: Quattro Vie per Mogadiscio/Somalitalia: Four Roads to Mogadishu. With the documentary La quarta via: Mogadiscio, Pavia. Roma, Kimerafilm,2012, 37 p., ISBN: 9788890771408. € 15,00. Ribka Sibhatu, Aulò! Aulò! Aulò! Poesie di nostalgia, d’esilio ed’amore. Aulò! Aulò! Aulò! Poems of Nostalgia, Exile and Love.With the documentary by Simone Brioni (ed.) Aulò: Romapostcoloniale, Roma, Kimerafilm, 2012, 41 p., ISBN:9788890771415. € 15,00.
Marginalization of African-Americans in the Social Sphere of US Society
Linde Riphagen
The Interdisciplinary Journal of International Studies , 2008,
Abstract: This article deals with the marginalization of African-Americans in the social sphere of US society. It will discuss some general social implications of persisting racial inequalities within the society, as well as specific institutions such as the prison system and residential segregation. Those systems, directly and indirectly uphold the marginal position of African-Americans in US society. The reality continues to persist that the US remains a highly unequal society for its different races, and this article is concerned with investigating why this is so.
Comments on Inflationary Cosmology
Andrei Linde
Physics , 1993,
Abstract: In this talk we discuss three different issues. First of all, there exist several proposals how to solve cosmological problems by adiabatic expansion of the Universe, without any use of inflation. We explain why these models do not solve the flatness/entropy problem. On the other hand there exist some claims that inflation also does not solve the flatness problem. We show that these claims are correct to a certain extent for old and new inflation, but are incorrect for simplest versions of chaotic inflation. The second issue to be considered is the classification of inflationary models. At present many inflationary models are compared to each other in order to understand which of them better describes observational data. Unfortunately, this often leads to terminological misunderstandings and even to misleading conclusions. We discuss three coexisting types of classification of inflationary models and explain their relation to each other. We also briefly describe the hybrid inflation model, which combines several interesting features of different inflationary models. Finally we show that it is possible to describe inflationary universe by a stationary (i.e. time-independent) probability distribution to find a domain of a given size containing matter with given properties. This represents a strong deviation of inflationary cosmology from the standard Big Bang paradigm.
Quantum Cosmology and the Structure of Inflationary Universe
Andrei Linde
Physics , 1995,
Abstract: In this review I consider several different issues related to inflation. I will begin with the wave function of the Universe. This issue is pretty old, but recently there were some new insights based on the theory of the self-reproducing inflationary universe. Then we will discuss stationarity of inflationary universe and the possibility to make predictions in the context of quantum cosmology using stochastic approach to inflation. Returning to more pragmatic aspects of inflationary theory, we will discuss inflationary models with $\Omega < 1$. Finally, we will describe several aspects of the theory of reheating of the Universe based on the effect of parametric resonance.
Prospects of Inflationary Cosmology
Andrei Linde
Physics , 1996,
Abstract: In this review I briefly describe the evolution of the inflationary theory from the scenario based on the idea of supercooling and expansion in the false vacuum toward the theory of eternally expanding self-reproducing inflationary universe. I describe recent development of inflationary cosmology with Omega < 1, and then discuss some issues related to the possibility to verify inflation by comparing its predictions with observational data. I argue that it is possible to verify and disprove many particular models of inflationary cosmology, but it is very difficult to kill the basic idea of inflation. It seems that the best (and may be even the only) way to do so is to suggest a better cosmological theory.
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