33,388 research outputs found
Neutral color-spin locking phase in neutron stars
We present results for the spin-1 color-spin locking phase (CSL) using a
NJL-type model in two flavor quark matter for compact stars applications. The
CSL condensate is flavor symmetric and therefore charge and color neutrality
can easily be satisfied. We find small energy gaps ~1 MeV, which make the CSL
matter composition and the EoS not very different from the normal quark matter
phase. We keep finite quark masses in our calculations and obtain no gapless
modes that could have strong consequences in the late cooling of neutron stars.
Finally, we show that the region of the phase diagram relevant for neutron star
cores, when asymmetric flavor pairing is suppressed, could be covered by the
CSL phase.Comment: 3 pages, 4 figures, contribution talk to the IVth International
Conference on Quarks and Nuclear Physics(QNP06), Madrid, Spain, 5-10 Jun 200
A Comparison of Machine-Learning Methods to Select Socioeconomic Indicators in Cultural Landscapes
Cultural landscapes are regarded to be complex socioecological systems that originated as a result of the interaction between humanity and nature across time. Cultural landscapes present complex-system properties, including nonlinear dynamics among their components. There is a close relationship between socioeconomy and landscape in cultural landscapes, so that changes in the socioeconomic dynamic have an effect on the structure and functionality of the landscape. Several numerical analyses have been carried out to study this relationship, with linear regression models being widely used. However, cultural landscapes comprise a considerable amount of elements and processes, whose interactions might not be properly captured by a linear model. In recent years, machine-learning techniques have increasingly been applied to the field of ecology to solve regression tasks. These techniques provide sound methods and algorithms for dealing with complex systems under uncertainty. The term âmachine learningâ includes a wide variety of methods to learn models from data. In this paper, we study the relationship between socioeconomy and cultural landscape (in Andalusia, Spain) at two different spatial scales aiming at comparing different regression models from a predictive-accuracy point of view, including model trees and neural or Bayesian networks
Surviving Academia
The process of healing from first episode psychosis as a queer person of color is not represented in the medical model, academia, or media. As a pansexual, non-binary, Latinx femme with a psychological disability, walking out of the hospital doors for the final time incited immense amounts of isolation that overcame my spirit because of the lack of dialogue around such healing. I assembled this zine with the intention of my intuition that somehow, somewhere, someone with my identities and positionality exists with similar trauma to mine from having experienced a mental health crisis. Zines are an accessible multimedia approach to sharing collective wisdom. The very definition of a zine varies as each publication can differ in size, art and writing media, price, and shape. Through this multimedia personal narrative of the different stages of healing, I continue to endure as a graduate student still affected by my trauma, I hope to center the power of personal narrative and lived experience as valid scholarship
Determining optimal cashew nut shell liquid extraction method
El trabajo consistiĂł en optimizar los parĂĄmetros de extracciĂłn del lĂquido de la cĂĄscara del anacardo de las propias cĂĄscaras del anacardo. Este lĂquido es principalmente un aceite que tiene mĂșltiples aplicaciones y en la industria alimentaria es un residuo porque no se puede ingerir. El componente mĂĄs importante de este aceite es el ĂĄcido anacĂĄrdico que es el compuesto que mĂĄs aplicaciones, por ello se realizan mĂșltiples anĂĄlisis para determinar su composiciĂłn.Departamento de IngenierĂa QuĂmica y TecnologĂa del Medio AmbienteGrado en IngenierĂa QuĂmic
Between Crazy and Fine
As a young Latina, I grew up hiding the fact that I met with a therapist and that I suffered from depression and anxiety. Conversations about mental well-being or taking steps to cope with anxiety were non-existent in my community of friends and family. It was always a taboo topic, an area that we never touched. People were labeled as âcrazyâ and serious situations were swept under the rug. Seldom was I offered empathy or support. [excerpt
The Role of Cultural Landscapes in the Delivery of Provisioning Ecosystem Services in Protected Areas
The aim of this paper is to assess and highlight the significance of cultural landscapes in protected areas, considering both biodiversity and the delivery of provisioning ecosystem services. In order to do that, we analyzed 26 protected areas in Andalusia (Spain), all of them Natural or National Parks, regarding some of their ecosystem services (agriculture, livestock grazing, microclimate regulation, environmental education and tourism) and diversity of the four terrestrial vertebrate classes: amphibians, reptiles, mammals, and birds. A cluster analysis was also run in order to group the 26 protected areas according to their dominant landscape. The results show that protected areas dominated by dehesa (a heterogeneous system containing different states of ecological maturity), or having strong presence of olive groves, present a larger area of delivery of provisioning ecosystem services, on average. These cultural landscapes play an essential role not only for biodiversity conservation but also as providers of provisioning ecosystem services
Algorithms For Extracting Timeliness Graphs
We consider asynchronous message-passing systems in which some links are
timely and processes may crash. Each run defines a timeliness graph among
correct processes: (p; q) is an edge of the timeliness graph if the link from p
to q is timely (that is, there is bound on communication delays from p to q).
The main goal of this paper is to approximate this timeliness graph by graphs
having some properties (such as being trees, rings, ...). Given a family S of
graphs, for runs such that the timeliness graph contains at least one graph in
S then using an extraction algorithm, each correct process has to converge to
the same graph in S that is, in a precise sense, an approximation of the
timeliness graph of the run. For example, if the timeliness graph contains a
ring, then using an extraction algorithm, all correct processes eventually
converge to the same ring and in this ring all nodes will be correct processes
and all links will be timely. We first present a general extraction algorithm
and then a more specific extraction algorithm that is communication efficient
(i.e., eventually all the messages of the extraction algorithm use only links
of the extracted graph)
Anchored in El Sueno Americano
âGive me your tired, give me your poor.â With these words carved into the Statue of Liberty, we should never forget that the United States of America is the home of those fleeing oppression, of those who are brave, and of those who are willing to give their best. [excerpt
Business travel and mobile workers
Transportation activity generated by businesses has been analyzed mainly with reference to freight flows and commuting trips. The area of employee business trips has been largely ignored, even though the literature â particularly that dealing with industrial economics â has endeavored to show both the central role played by face-to-face encounters in economic contact, and the decreased need for proximity as a prerequisite to such contact taking place in the first place. This paper takes this literature, both theoretical and empirical, as its base, and then aims to gain a more comprehensive understanding of the need for business travel and the profiles of mobile workers. It also investigates how the workers involved perceive, and how companies account for such mobility.business travel, mobile workers, face to face, ICT
A Spatially Extended Model for Residential Segregation
In this paper we analyze urban spatial segregation phenomenon in terms of the
income distribution over a population, and inflationary parameter weighting the
evolution of housing prices. For this, we develop a discrete, spatially
extended model based in a multi--agent approach. In our model, the mobility of
socioeconomic agents is driven only by the housing prices. Agents exchange
location in order to fit their status to the cost of their housing. On the
other hand, the price of a particular house changes depends on the status of
its tenant, and on the neighborhood mean lodging cost, weighted by a control
parameter. The agent's dynamics converges to a spatially organized
configuration, whose regularity we measured by using an entropy--like
indicator. With this simple model we found a nontrivial dependence of
segregation on both, the initial inequality of the socioeconomic agents and the
inflationary parameter. In this way we supply an explanatory model for the
segregation--inequality thesis putted forward by Douglas Massey.Comment: 17 pages, 11 figures. email: [email protected],
[email protected]
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