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Search Results: 1 - 10 of 325488 matches for " S. Manzi "
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Research on Real Estate Bubble Measurement and Prevention Countermeasures in Guangzhou City  [PDF]
Manzi Ji
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.611003
Abstract: The purpose of this paper is to analyze whether the real estate industry in Guangzhou will have a bubble phenomenon with the rapid rise in housing prices. This issue has also become the focus of public concern and has great practical significance for maintaining social stability and healthy economic development. This paper adopts the research methods of single index and comprehensive index, and uses Guangzhou data from 2007 to 2017 to analyze the existence and measurement of real estate bubble. According to the empirical results, this paper further elaborates the causes of the bubble. The results indicate that: 1) The study chooses a measurement indicator and constructs a real estate bubble measurement system from the perspectives of supply and demand, investment, and credit. 2) Whichever method is used, the measurement results indicate that exists a bubble, and it shows a clear upward trend. It’s concluded that: 1) There are many causes of the real estate bubble in Guangzhou, including imbalances in supply and demand, land costs, speculation, and financial expansion, et al. 2) The measurement results of the Guangzhou real estate bubble can provide relevant evidence for the government to formulate policies or means to curb the economic bubble.
Propiedades de equilibrio y cinética de dímeros interactuantes en redes cuadradas
S. Manzi,R. Belardinelli,V. D. Pereyra
Revista mexicana de física , 2007,
Abstract: Se analizan las propiedades de equilibrio y la cin′etica de d′ meros interactuantes sobre redes cuadradas utilizando m′etodos estad′ sticos y cin′eticos. Se introduce un nuevo modelo de adsorci′on de d′ meros, el cual permite que los d′ meros homonucleares s′olo se adsorban paralelos a una de las orientaciones de la red (d′ meros alineados). Se implementan simulaciones de Monte Carlo, c′alculo exacto de la funci′on de partici′on en clusters finitos, y la soluci′on exacta de las ecuaciones de movimiento en un cluster finito para obtener las propiedades de equilibrio (isotermas de adsorci′on) y la cin′etica a trav′es de los espectros de desorci′on t′ermica. La presencia de estructuras ordenadas para interacciones laterales repulsivas puede observarse en las isotermas de adsorci′on y los espectros de DTP.
Adsorption-desorption kinetics with multiple site occupation
S. Manzi,G. Costanza,V. D. Pereyra
Revista mexicana de física , 2005,
Abstract:
Propiedades de equilibrio y cinética de dímeros interactuantes en redes cuadradas
Manzi, S.;Belardinelli, R.;Pereyra, V.D.;
Revista mexicana de física , 2007,
Abstract: the equilibrium and kinetics properties of interacting dimmers adsorbed on square lattice are analyzed by using statistical and kinetic methods. a new adsorption model is introduced, the homonuclear dimmers only are adsorbed parallel to one of the lattice orientations (aligned dimmers). monte carlo simulation, exact calculation of the partition function on finite cluster, and the exact solution of the equations of motion in a finite cluster are implemented to obtain the equilibrium (adsorption isotherms) and kinetics throughout the study of the thermal desorption spectra. the presence of structural order for repulsive lateral interactions can be observed in the adsorption isotherms and tpd spectra.
Confianza en instituciones políticas en Chile: un modelo de los componentes centrales de juicios de confianza Trust in Political Institutions in Chile: A Model of the Main Components of Trust Judgments
CAROLINA SEGOVIA,ANDRéS HAYE,ROBERTO GONZáLEZ,JORGE MANZI
Revista de Ciencia Política , 2008,
Abstract: La confianza que los ciudadanos depositan en las instituciones políticas es importante para las democracias. Sin embargo, existen dudas acerca de la naturaleza de los juicios de confianza. Se propone que los juicios de confianza hacia instituciones políticas involucran de manera central la consideración de la preparación y recursos de la institución para cumplir sus metas (capacidad), así como de la auténtica orientación de tales metas hacia el bienestar de los ciudadanos (benevolencia). Los resultados se basan en una encuesta realizada en Santiago de Chile durante 2005 de 996 personas. Se concluye que ambos son fuertes predictores de la confianza y que, además de la influencia directa de cada uno de ellos sobre los juicios de confianza, tendrían un efecto conjunto. Citizen's trust in political institutions is important for democracies. However, there are doubts regarding the nature of trust judgments. We argue that trust judgments concerning political institutions centrally involve the consideration of both the preparation and resources of the institutions that enable it to fulfill its goals (capacity), and the orientation of such goals toward the wellbeing of citizens (benevolence). Results are based on a survey carried out in Santiago, Chile, during 2005 on 996 people. We conclude that both capacity and benevolence are strong predictors of trust and that, beyond the direct influence of each of them, they also have a joint effect on trust judgments.
Identidad y actitudes políticas en jóvenes universitarios: el desencanto de los que no se identifican políticamente
Roberto González,Jorge Manzi,Flavio Cortés,David Torres
Revista de Ciencia Política , 2005,
Abstract: Este trabajo reporta una investigación que busca analizar las actitudes y orientaciones que caracterizan a un grupo de creciente importancia en el sistema político chileno: quienes no se identifican con partidos o coaliciones. El estudio se organizó a partir de un conjunto de hipótesis derivadas de la Teoría de la Identidad Social, así como de estudios previos relacionados con actitudes políticas generalizadas. La investigación se llevó a cabo en una muestra de estudiantes universitarios de Santiago (N=1460), quienes respondieron un cuestionario autoadministrado. Los resultados confirmaron que quienes no se identifican políticamente tampoco lo hacen con otros referentes colectivos como la nación y la religión. Sus actitudes políticas son también distintivas: en comparación con quienes se identifican con partidos o coaliciones, su cinismo político es mayor y su eficacia política menor. Su tolerancia política y autoritarismo difiere de quienes se identifican con partidos o coaliciones de derecha y su adhesión a la democracia se encuentra en un nivel intermedio con respecto a quienes se identifican con la centro-derecha y centro-izquierda. En su conjunto, los resultados muestran que este grupo manifiesta una clara retracción con respecto a referentes de identidad e integración social. El trabajo concluye recomendando la realización de estudios longitudinales que permitan establecer y caracterizar las transiciones identitarias que llevan a esta forma de desafección política. This paper reports a study which analyzes attitudes and orientations of a group with growing significance in Chilean politics: people who do not identify with political parties or coalitions. The study was organized around a set of hypotheses derived from Social Identity Theory and previous research on generalized political attitudes. Participants of the study were university students in Santiago (N=1460), who answered a self-administered questionnaire. Results confirmed that those who are politically disengaged tend not to identify with other collective referents: the nation or religion. Their political attitudes are also distinctive: in comparison with people who identify with political parties or coalitions, their political cynicism is higher and their sense of political efficacy is lower. The political tolerance and authoritarianism of this group was significantly different from the levels exhibited by participants identified with right-wing parties and coalitions. Their support for democracy was intermediate as compared to that showed by left-wing and right-wing participants. In ge
Analysis of the convergence of the 1/t and Wang-Landau algorithms in the calculation of multidimensional integrals
R. E. Belardinelli,S. Manzi,V. D. Pereyra
Physics , 2008, DOI: 10.1103/PhysRevE.78.067701
Abstract: In this communication, the convergence of the 1/t and Wang - Landau algorithms in the calculation of multidimensional numerical integrals is analyzed. Both simulation methods are applied to a wide variety of integrals without restrictions in one, two and higher dimensions. The errors between the exact and the calculated values of the integral are obtained and the efficiency and accuracy of the methods are determined by their dynamical behavior. The comparison between both methods and the simple sampling Monte Carlo method is also reported. It is observed that the time dependence of the errors calculated with 1/t algorithm goes as N^{-1/2} (with N the MC trials) in quantitative agreement with the simple sampling Monte Carlo method. It is also showed that the error for the Wang - Landau algorithm saturates in time evidencing the non-convergence of the methods. The sources for the error are also determined.
Adsorption-Desorption Kinetics: A Review of a Classical Problem
S. Manzi,R. E. Belardinelli,G. Costanza,V. D. Pereyra
Physics , 2008,
Abstract: In this work we have analyzed the adsorption-desorption kinetics in the framework of the lattice gas model. We have shown that the coefficients representing the transition probabilities must be carefully chosen even when they fulfill the principle of detailed balance, otherwise the observables arising from the kinetics present anomalous behavior. We have demonstrated that when the adsorption $A_i$ and desorption $D_i$ coefficients are linearly related through a parameter $\gamma$, there are values of lateral interaction, $V$, that lead to bad behavior in the kinetics. We have shown a phase diagram for the allowed values of $V$ and $\gamma$, concluding that detailed balance does not guarantee a correct physical behavior of the observables obtained from the rate equations like adsorption isotherms, sticking coefficients and thermal desorption spectra. Alternatively, we have introduced a description of the adsorption-desorption processes based in a simple but consistent energetic argument that leads to a correct behavior of the observables without physical inconsistencies.
Before the Emergence of Homo sapiens: Overview on the Early-to-Middle Pleistocene Fossil Record (with a Proposal about Homo heidelbergensis at the subspecific level)
Giorgio Manzi
International Journal of Evolutionary Biology , 2011, DOI: 10.4061/2011/582678
Abstract: The origin of H. sapiens has deep roots, which include two crucial nodes: (1) the emergence and diffusion of the last common ancestor of later Homo (in the Early Pleistocene) and (2) the tempo and mode of the appearance of distinct evolutionary lineages (in the Middle Pleistocene). The window between 1,000 and 500 thousand years before present appears of crucial importance, including the generation of a new and more encephalised kind of humanity, referred to by many authors as H. heidelbergensis. This species greatly diversified during the Middle Pleistocene up to the formation of new variants (i.e., incipient species) that, eventually, led to the allopatric speciation of H. neanderthalensis and H. sapiens. The special case furnished by the calvarium found near Ceprano (Italy), dated to 430–385?ka, offers the opportunity to investigate this matter from an original perspective. It is proposed to separate the hypodigm of a single, widespread, and polymorphic human taxon of the Middle Pleistocene into distinct subspecies (i.e., incipient species). The ancestral one should be H. heidelbergensis, including specimens such as Ceprano and the mandible from Mauer. 1. Introduction The origin of anatomically and genetically modern humans (H. sapiens) from a small population of “archaic” Homo is an event reasonably well set in sub–Saharan Africa around 200 thousand years before present (or ka) [1–3]. Nevertheless, this event has deep roots in the Middle Pleistocene, primarily at the time of the divergence between the evolutionary lineage of our own species and that of the Neanderthals—between approximately 800 and or 520?ka, according to Briggs and coworkers [4] (compare [5]), or between 538 and 315?ka, according to Endicott and colleagues [6]—and even earlier, in the late Early Pleistocene, when the common ancestor of both H. sapiens and H. neanderthalensis emerged and began to spread geographically. This paper aims at investigating such a new frontier for paleoanthropology. It will focus on topology, chronology, tempo, and mode of the main evolutionary nodes before the appearance of H. sapiens. When considering all the available data, we are confronted with a comprehensive scenario about the deep roots of our species. At the same time, it becomes possible to approach the issue from regional and/or local perspectives [7]. The special case study provided by a well-known fossil specimen from Italy—that is, the calvarium from Ceprano (for a review, see [8])—may help to see the remote origins of H. sapiens from an interesting and helpful perspective. 2. Old and New
La representación de la ciudad en un manuscrito carolingio
Manzi,Ofelia;
Temas medievales , 2006,
Abstract: the analysis of the miniatures in the ninth century utrecht psalter shows the originality of carolingian work where the relationship between text and image is solved by means of a particular rhetorical language. certain traits in style which in the hellenistic tradition represented mere indicators of landscapes, buildings or various other objects, now acquire a different meaning which can be understood only through a thorough interpretation of their context.in the case of representations of the city it is possible to identify different meanings assigned to iconographic themes which are consistent with established patterns.
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