LINEARITY OF REGRESSION FOR NON-ADJACENT WEAK RECORDS

Abstract: A complete characterization of the family of distributions with linearity of regression for future non-adjacent weak records with spacing equal to two is given. Also, in the adjacent case, weak-record versions of some known characterization results for regular records are presented

From Delirium to Coherence: Shamanism and Medicine Plants in Silko’s Ceremony

A nondescript rock shelter in Texas provides unexpected evidence for shamanism in Leslie Marmon Silko’s Ceremony. There, archaeologists found clearly identifiable images of antlered human figures and entheogenic plant substances, including datura (jimson weed), peyote, and ephedra (Indian or Mormon tea), items associated with shamanistic practices. From a more recent site in Bandolier, New Mexico, datura seeds “in perfect condition” were found in the community house, occupied from 1383 to 1466. These could be interpreted as evidence of shamanism in the Southwest, long before Silko makes use of some of the same animal and plant elements. Motifs of antlered animals and ceremonial medicine plants occur throughout the novel. Ceremony has a dualistic plot structure, which alternates between the embedded traditional verse and the prose narrative. Additional strands of meaning are woven throughout these structures, including the language of animal and medicine plants. A deer is one of the central animals associated with Tayo, as well as the hybrid spotted cattle. Plants are present in a deliberate order, corresponding to the book’s four ceremonies. These entheogenic plants—Indian tea (ephedra), tobacco, morning glory, and datura—effect healing changes in Tayo’s consciousness. Most important is the ancient plant datura, the final ceremonial medicine and the one associated with Tayo himself. Four healers, each associated with the plants, conduct the book’s ceremonies: the traditional Laguna medicine man Ku’oosh; the nonorthodox mixed-blood Diné (Navajo) healer Betonie; the mystical spirit-woman Ts’eh, whose name resembles the Keres Pueblo word for Mount Taylor; and finally Tayo himself. By the end of the novel, Tayo learns the stories, the songs, the plants, and the ritual actions of a healer. Betonie sets Tayo on the path to become an active participant in healing by telling Tayo that he must find autumn stars, the spotted cattle, the mountain, and the woman Ts’eh (152). After Tayo experiences these, under the tutelage of Ts’eh, he finds a cliff drawing of an elk (230). This deer-like animal also signifies Tayo’s assumption of the role of ceremonial leader, or cheani

Gaussian conditional structure of the second order and the Kagan classification of multivariate distributions

The only Kagan-n,2(loc) probability measure with Gaussian conditional structure of the second order (GCS2) is a multivariate normal distribution. Also a short review of the known results on the GCS2 distributions is given.Kagan class Gaussian conditional structure of the second order multivariate normal law linearity of regression homoscedasticity characterization

The origin of parental care in birds: a reassessment

energy expenditure; Ficedula hypoleuca; pied flycatcher; song

Limit theorems for random permanents with exchangeable structure

Abstract Permanents of random matrices extend the concept of U-statistics with product kernels. In this paper, we study limiting behavior of permanents of random matrices with independent columns of exchangeable components. Our main results provide a general framework which unifies already existing asymptotic theory for projection matrices as well as matrices of all-iid entries. The method of the proofs is based on a Hoeffding-type orthogonal decomposition of a random permanent function. The decomposition allows us to relate asymptotic behavior of permanents to that of elementary symmetric polynomials based on triangular arrays of rowwise independent rv's. r 2004 Elsevier Inc. All rights reserved

Projection formulas for orthogonal polynomials. arxiv.org/abs/math.CA/0606092

Abstract We prove a new projection formula for the four-parameter family of orthogonal polynomials outside of the Askey-Wilson class. By carefully analyzing the recurrence relations we manage to overcome the lack of explicit expression for the orthogonality measure

Power Backoff Reduction Techniques for Generalized Multicarrier Waveforms

Amplification of generalized multicarrier (GMC) signals by high-power amplifiers (HPAs) before transmission can result in undesirable out-of-band spectral components, necessitating power backoff, and low HPA efficiency. We evaluate variations of several peak-to-average power ratio (PAPR) reduction and HPA linearization techniques which were previously proposed for OFDM signals. Our main emphasis is on their applicability to the more general class of GMC signals, including serial modulation and DFT-precoded OFDM. Required power backoff is shown to depend on the type of signal transmitted, the specific HPA nonlinearity characteristic, and the spectrum mask which is imposed to limit adjacent channel interference. PAPR reduction and HPA linearization techniques are shown to be very effective when combined