Universal Kaluza-Klein reductions of type IIB to N=4 supergravity in five dimensions

We construct explicit consistent Kaluza-Klein reductions of type IIB supergravity on HK_4 x S^1, where HK_4 is an arbitrary four-dimensional hyper-Kaehler manifold, and on SE5, an arbitrary five-dimensional Sasaki-Einstein manifold. In the former case we obtain the bosonic action of D=5 N=4 (ungauged) supergravity coupled to two vector multiplets. For the SE_5 case we extend a known reduction, which leads to minimal D=5 N=2 gauged supergravity, to also include a multiplet of massive fields, containing the breathing mode of the SE_5. We show that the resulting D=5 action is also consistent with N=4 gauged supergravity coupled to two vector multiplets. This theory has a supersymmetric AdS_5 vacuum, which uplifts to the class of supersymmetric AdS_5 x SE_5 solutions, that spontaneously breaks N=4 to N=2, and also a non-supersymmetric AdS_5 vacuum which uplifts to a class of solutions first found by Romans.Comment: 1+34 pages. v2: Minor typos corrected, three references added. Version to be published in JHE

Journey from home

My art Is built on a foundation of personal experiences: First, as a child In New York City and Puerto Rico, and second, as a man learning his craft in universities and workshops in Wisconsin, Illinois, Texas, and Mexico. I categorize this deductive process as the emergence of the personal Me,” because most artists develop a visual language of signs and symbols that has been shaped by the artist’s family, education, and personal experiences. It is also a deductive process that has shaped the personal “Me” through an analysis of my movement away from pernicious generalities, characterized by living under mistaken ethnic and cultural assumptions, toward a specific ethnic and cultural identify based on the discovery of my Puerto Rican identity and the realization that I am also a Latino artist. Regarding the issue of ethnic and cultural identity, many minority artists confront two problems: First, in shaping their art within the Western canon of aesthetics; second, by exploring the meaning of their personal Me” vis-a-vis their relationship with their ethnic community or communities. Critic James D. Cockcroft cogently affirms the importance of community for many Puerto Rican and, especially relevant to me, many mainland-bom Latino artists: Latino artists have a strong commitment to making ait a part of public life, whether in the home, on the side of a building, or at a bus stop. It is art to be seen and enjoyed by everyone. 1 My art is community specific, i.e. Puerto Rican and Latino, a model which has been employed by other minority artists such as Haitian-Puerto Rican artist Jean-Michel Basquiat, who elevated urban graffiti into mainstream art, Brooklyn-born Puerto Rican Rafael Tufino, who celebrated his Puerto Rican heritage in bold strokes on linoleum prints meant for mass diffusion, and Chicana artist Santa C. Barraza, who created a modem iconography based on Chicano and Mexican folk traditions. I situate my art in this realm by employing iconic and allegorical fantasy coupled with Puerto Rican, Latino, and indigenous traditions from the United States, the Caribbean, and Mesoamerica. My use of fantasy involves a vocabulary of visual images that share two specific elements. They are, first, community based, and, second, they are memory specific, acting as metaphors to transform my past into art that works on two levels: a surface context, i.e. the subject of the painting, and a sub-context, i.e. the underlying meaning of my work. In real terms, as I draw one icon, it acts as a catalyst to produce another image until I have accumulated a complete design, charged with the energy of my emotions, expressed conceptually through the subject matter\u27s imagery and subversively as I exaggerate them on canvas or paper. What I do is not a reaction to visual objects, but a reaction to my mind’s impulses. By heightening awareness, I produce art based on the personal Me. However, I do not want to leave the impression that these images are mere random impulses drawn from my subconscious. In reality, they are shaped by a willful intention that articulates and transforms ideas and experiences into visual forms. This is what I call the power of the image

Insurgent aesthetics: Creole rap from the outskirts of Lisbon

The invisibility of the people of African descent in Portugal has been challenged in recent years by a diversity of agents. From the artistic-cultural field to political activism, the voice of those who contest a homogeneous model of Portugueseness based on whiteness and a narrative of exceptionality grows. Black rappers from the outskirts of Lisbon were one of the pioneers in denouncing these contradictions, narrating in their songs the intercultural daily life of their neighborhoods and the tensions of living in a society that sees them as outsiders. The possession of digital devices has opened up new opportunities for these peripheral artists, multiplying the possibilities for them to be heard and made visible. In close connection with the new technologies, they build an insurgent aesthetic that values marginalized areas of the city while at the same time making visible an Afro-Lisbon that is not recognized by the official institutions of State.info:eu-repo/semantics/acceptedVersio

Reentrant phase behaviour for systems with competition between phase separation and self-assembly

In patchy particle systems where there is competition between the self-assembly of finite clusters and liquid-vapour phase separation, reentrant phase behaviour is observed, with the system passing from a monomeric vapour phase to a region of liquid-vapour phase coexistence and then to a vapour phase of clusters as the temperature is decreased at constant density. Here, we present a classical statistical mechanical approach to the determination of the complete phase diagram of such a system. We model the system as a van der Waals fluid, but one where the monomers can assemble into monodisperse clusters that have no attractive interactions with any of the other species. The resulting phase diagrams show a clear region of reentrance. However, for the most physically reasonable parameter values of the model, this behaviour is restricted to a certain range of density, with phase separation still persisting at high densities.Comment: 13 pages, 10 figure

Automating the configuration of the controls systems of the LHC experiments

The supervisory layer of the Large Hadron Collider (LHC) experiments is based on the Prozeßvisualisierungs- und Steuerungsystem (PVSS) [1] and the Joint COntrols Project (JCOP) Framework (FW) [2]. This controls framework includes a Finite State Machine (FSM) toolkit, which allows to operate the control systems according to a well-defined set of states and commands. During the FSM transitions of the detectors, it is required to re-configure parts of the control systems. All configuration parameters of the devices integrated into the control system are stored in the so-called configuration database. In this paper the JCOP FW FSM-Configuration database tool is presented. This tool ensures the availability of all required configuration data, for a given type of run of the experiment, in the PVSS sub-detector control applications. The chosen implementation strategy is discussed in the paper. The approach enables the standalone operation of different partitions of the detectors simultaneously while ensuring independent data handling

AUTOMATING THE CONFIGURATION OF THE CONTROLS SYSTEMS OF THE LHC EXPERIMENTS

The supervisory layer of the Large Hadron Collider (LHC) experiments is based on the Prozeßvisualisierungs- und Steuerungsystem (PVSS) [1] and the Joint COntrols Project (JCOP) Framework (FW) [2]. This controls framework includes a Finite State Machine (FSM) toolkit, which allows to operate the control systems according to a well-defined set of states and commands. During the FSM transitions of the detectors, it is required to re-configure parts of the control systems. All configuration parameters of the devices integrated into the control system are stored in the so-called configuration database. In this paper the JCOP FW FSM-Configuration database tool is presented. This tool ensures the availability of all required configuration data, for a given type of run of the experiment, in the PVSS sub-detector control applications. The chosen implementation strategy is discussed in the paper. The approach enables the standalone operation of different partitions of the detectors simultaneously while ensuring independent data handling