Non-Gaussian Foreground Residuals of the WMAP First Year Maps

We investigate the effect of foreground residuals in the WMAP data (Bennet et al. 2004) by adding foreground contamination to Gaussian ensembles of CMB signal and noise maps. We evaluate a set of non-Gaussian estimators on the contaminated ensembles to determine with what accuracy any residual in the data can be constrained using higher order statistics. We apply the estimators to the raw and cleaned Q, V, and W band first year maps. The foreground subtraction method applied to clean the data in Bennet et al. (2004a) appears to have induced a correlation between the power spectra and normalized bispectra of the maps which is absent in Gaussian simulations. It also appears to increase the correlation between the dl=1 inter-l bispectrum of the cleaned maps and the foreground templates. In a number of cases the significance of the effect is above the 98% confidence level.Comment: 9 pages, 4 figure

Erik Erikson on Negative Identity & Pseudospeciation : Extended and Particularized by Ta-Nehisi Coates

One can feel challenged in this chilling time when sundry variations of ultra-nationalism have become quite discernable in the USA, Europe, the Middle East, and parts of Africa. They have often taken the form of a rhetoric of fear and hatred toward “undesirables.” In this time of trouble in an increasingly nuclearized world, it is well to turn to Erik Erikson. His related concepts of “negative identity” and “pseudospeciation” need to be addressed more fully than they have in recent decades. Much is to be gained by both academic discussion and public debate over these two Erikson concepts. They signal elements in his “Way of Looking at Things.” More immediately, they help us address the crude and dangerous ultra-nationalisms of our time. Sensitive to the intimate relationship between the inner self and the outer social circumstances, Erikson, began in the mid and late 1940s to shape his most central concept - identity formation. It is well to refresh ourselves on the qualities he assigned to identity, for without that recall, one can hardly come to grips with his concepts of “universal Specieshood” and “pseudospeciation”, both of which emerged from it. In Childhood and Society [1], perhaps his most innovative book, Erikson displayed a marked cross-cultural perspective, comparing psychological development in several countries and cultures. While “officially” pledging fealty to Freudian psychoanalysis, Erikson was more attentive than Freud had been to ways the social circumstances of a society impacted the inner psyches of its members. Most importantly, Childhood and Society introduced the concept of an eight-stage human life cycle that was anchored in a struggle to garner and sustain personal identity. There is profit in recognizing here that Erikson’s concept of identity was initially formulated more than three decades before in his still unpublished “Manuscript von Erik.” It is the story of his Wanderschaft amidst a troubled adolescence. Identity was characterized in this narrative as a personal sense of sameness and historical continuity through which life seemed to cohere1. The “Manuscript” captured young Erik’s thoughts and tensions at the time. Identity was cast within what later came to be called the stages of the human life cycle. Indeed, it became central to these stages. The life cycle involved a person moving toward and sustaining a viable sense of identity. Long before he had even heard of Freud, the “Manuscript von Erik” essentially represented the beginning of an intellectual process that left us with Childhood and Society. The initial “Manuscript” centered on a tension between one’s inner subconscious drives and the needs of society, and this became the essence of his premier book. It is no service to scholarship that “Manuscript von Erik” has never been published and made readily available to scholars. Each of the eight stages in Erikson’s delineation of the human life cycle is to be construed as a polarity-a positive and hopeful disposition counterpointed by a pole that reduced the vibrancy of everyday existence. The first stage underscored the pole of trust that (hopefully) overshadowed the opposite pole mistrust [2]. The next stage, infancy, featured the polarity of autonomy on the one hand and shame on the other. There followed “initiative” vs. “guilt”, “industry over a sense of inferiority, the all-important quality of “identity” over “role diffusion” during adolescence, “intimacy” rather than “isolation” in young adulthood, “generativity” over “self-absorption” during midlife, and finally a sense of “integrity” over “despair” in old age. [Introduction]info:eu-repo/semantics/publishedVersio

Modelling and forecasting short-term electricity load: a two step methodology

The goal of this paper is to develop a forecasting model of the hourly electricity load demand in the area covered by an utility company located in the southeast of Brazil. A di®erent model is constructed for each hour of day, thus there are 24 di®erent models. Each model is based on a decomposition of the daily series of each hour in two components. The ¯rst component is purely deterministic and is related to trends, seasonality, and special days e®ect. The second one is stochastic and follows a linear autoregressive model. The multi-step forecasting performance of the proposed methodology is compared with a benchmark model and the results indicate that our proposal is a useful tool for electricity load forecasting.

Nonextensivity in the solar magnetic activity during the increasing phase of solar Cycle 23

In this paper we analyze the behavior of the daily Sunspot Number from the Sunspot Index Data Center (SIDC), the mean Magnetic Field strength from the National Solar Observatory/Kitt Peak (NSO/KP) and Total Solar Irradiance means from Virgo/SoHO, in the context of the $q$--Triplet which emerges within nonextensive statistical mechanics. Distributions for the mean solar Magnetic Field show two different behaviors, with a $q$--Gaussian for scales of 1 to 16 days and a Gaussian for scales longer than 32 days. The latter corresponds to an equilibrium state. Distributions for Total Solar Irradiance also show two different behaviors (approximately Gaussian) for scales of 128 days and longer, consistent with statistical equilibrium and $q$--Gaussian for scales $<$ 128 days. Distributions for the Sunspot Number show a $q$--Gaussian independent of timescales, consistent with a nonequilibrium state. The values obtained ("$q$--Triplet"$\equiv$$\{$$q$$_{stat}$,$q$$_{sen}$,$q$$_{rel}$$\}$) demonstrate that the Gaussian or $q$--Gaussian behavior of the aforementioned data depends significantly on timescales. These results point to strong multifractal behavior of the dataset analyzed, with the multifractal level decreasing from Sunspot Number to Total Solar Irradiance. In addition, we found a numerically satisfied dual relation between $q_{stat}$ and $q_{sen}$.Comment: 6 pages, 4 figure

Predictive Duty Cycle Adaptation for Wireless Camera Networks

Wireless sensor networks (WSN) typically employ dynamic duty cycle schemes to efficiently handle different patterns of communication traffic in the network. However, existing duty cycling approaches are not suitable for event-driven WSN, in particular, camera-based networks designed to track humans and objects. A characteristic feature of such networks is the spatially-correlated bursty traffic that occurs in the vicinity of potentially highly mobile objects. In this paper, we propose a concept of indirect sensing in the MAC layer of a wireless camera network and an active duty cycle adaptation scheme based on Kalman filter that continuously predicts and updates the location of the object that triggers bursty communication traffic in the network. This prediction allows the camera nodes to alter their communication protocol parameters prior to the actual increase in the communication traffic. Our simulations demonstrate that our active adaptation strategy outperforms TMAC not only in terms of energy efficiency and communication latency, but also in terms of TIBPEA, a QoS metric for event-driven WSN

A Parallel Histogram-based Particle Filter for Object Tracking on SIMD-based Smart Cameras

We present a parallel implementation of a histogram-based particle filter for object tracking on smart cameras based on SIMD processors. We specifically focus on parallel computation of the particle weights and parallel construction of the feature histograms since these are the major bottlenecks in standard implementations of histogram-based particle filters. The proposed algorithm can be applied with any histogram-based feature sets—we show in detail how the parallel particle filter can employ simple color histograms as well as more complex histograms of oriented gradients (HOG). The algorithm was successfully implemented on an SIMD processor and performs robust object tracking at up to 30 frames per second—a performance difficult to achieve even on a modern desktop computer

Power-law statistics and stellar rotational velocities in the Pleiades

In this paper we will show that, the non-gaussian statistics framework based on the Kaniadakis statistics is more appropriate to fit the observed distributions of projected rotational velocity measurements of stars in the Pleiades open cluster. To this end, we compare the results from the $\kappa$ and $q$-distributions with the Maxwellian.Comment: 13 pages, 3 figure

On the link between rotation, chromospheric activity and Li abundance in subgiant stars

The connection rotation-CaII emission flux-lithium abundance is analyzed for a sample of bona fide subgiant stars, with evolutionary status determined from HIPPARCOS trigonometric parallax measurements and from the Toulouse-Geneva code.Comment: 9 pages, 8 figure