204,003 research outputs found
"Sustaining Recovery--Medium-term Prospects and Policies for the U.S. Economy"
No full textThough recent market activity and housing reports give some warrant for optimism, United States economic growth was only 2.8 percent in the third quarter, and the unemployment rate is still very high. In their new Strategic Analysis, the Levy Institute's Macro-Modeling Team project that high unemployment will continue to be a problem if fiscal stimulus policies expire and deficit reduction efforts become the policy focus. The authors--President Dimitri B. Papadimitriou and Research Scholars Greg Hannsgen and Gennaro Zezza--argue that continued fiscal stimulus is necessary to reduce unemployment. The resulting federal deficits would be sustainable, they say, as long as they were accompanied by a coordinated and gradual devaluation of the dollar, especially against undervalued Asian currencies--a step necessary to prevent an increase in the current account deficit and ward off the risk of a currency crash.
Delivanis Dimitri J., L'économie sous-développée.
No full textDuflos M.-T. Delivanis Dimitri J., L'économie sous-développée.. In: Revue française de sociologie, 1964, 5-4. p. 478
Advanced Modeling for the Mixed-Mode Delamination of Composite Specimens
No full textIn recent years, many engineering components are made of high performance laminated composites and adhesively bonded interfaces. One of the most important damage modes of laminated structures is related to the non-linear and irreversible delamination process, including the formation and propagation of inter-laminar cracks, up to the complete detachment of the adherends. In this context, we address the interfacial delamination problem through an innovative cohesive formulation, named as Enhanced Beam Theory (EBT), where the specimen is considered as an assemblage of two composite sublaminates, partly bonded together by an elastic interface. This last one is represented by a continuous distribution of elastic springs acting along the normal and/or tangential direction, depending on the interfacial mixed-mode condition. This generalizes the idea suggested recently in [1] for a single mode-I delamination, and extended in [2] to include mixed loading, geometrical and mechanical conditions. The problem is here handled numerically through the generalized differential quadrature (GDQ) approach, to determine the delamination onset and propagation along weak interfaces of arbitrary shape, made of composite materials and subjected to mixed-mode conditions. The accuracy of the proposed formulation is verified against analytical predictions and theoretical formulations available in literature [3], [4].
References
[1] Dimitri, R., Cornetti, P., Mantič, V, Trullo, M. and De Lorenzis L. (2017) Mode-I debonding of a double cantilever beam: a comparison between cohesive crack modeling and Finite Fracture Mechanics, International Journal of Solids and Structures 124, 57–72.
[2] Dimitri, R., Tornabene, F. and Zavarise, G. (2018) Analytical and numerical modeling of the mixed-mode delamination process for composite moment-loaded double cantilever beams, Composite Structures 187, 535–553.
[3] Suo, Z. and Hutchinson J. W. (1990) Interface crack between two elastic layers. International Journal of Fracture 43(1), 1–18.
[4] Hutchinson, J. W. and Suo Z. (1992) Mixed mode cracking in layered materials. Advances in Applied Mechanics, 29, 63–191
Convergence of a gradient projection method
No full text"May 1982"Bibliography: leaf 12."Grant NSF ENG-79-106332"Eli M. Gafni, Dimitri P. Bertsekas
Asymptotic optimality of shortest path routing
No full text"July 1983"Bibliography: p. 29-30."DARPA ... contract ONR/N00014-75-C-1183"Eli M. Gafni, Dimitri P. Bertsekas
Jean-Pierre Michiels, Dimitri Uzundis - Mondialisation et citoyenneté
No full textMichel M. Jean-Pierre Michiels, Dimitri Uzundis - Mondialisation et citoyenneté . In: L'information géographique, volume 64, n°4, 2000. p. 382
Two-metric projection methods for constrained optimization
No full text"September, 1982."Bibliography: p. 48-50.Supported by the National Science Foundation under Grant NSF-79-106332by Eli M. Gafni and Dimitri P. Bertsekas
Contre-dires. Texte reçu de M. Costas Kyrris, au sujet du compte rendu de M. Dimitri Kitsikis, paru dans le n°9
No full textKyrris Costas P. Contre-dires. Texte reçu de M. Costas Kyrris, au sujet du compte rendu de M. Dimitri Kitsikis, paru dans le n°9. In: CEMOTI, n°11, 1991. Espace musical, espace historique, espace politique. pp. 195-204
Circulus Maximus II
No full textCurated intervention on Circulus Maximus. Works by Dimitri Vangrunderbeek, Richard Venlet & Pieter Vermeerschsponsorship: M HKA
OPaKstatus: Publishe
Dynamic Consistency in Extensive form Decision Problems
No full textIn a stimulating paper Piccione and Rubinstein (1997) argued how a decision maker could undertake dynamically inconsistent choices when, in an extensive form decision problem, she exhibits a particular type of imperfect recall named absentmindedness. Such imperfection obtains whenever an information set includes histories along the same decision path. Starting from work focusing on the Absentminded Driver example, and independently developed by Segal (2000) and Dimitri (1999), the main theorem of this paper provides a general result of dynamically consistent choices, valid for a large class of finite extensive form decision problems without nature.
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