Systolic square root covariance Kalman filtering

The square root covariance Kalman filter (SRCF) and the square root covariance Kalman predictor (SRCP) are derived from a least squares viewpoint. A new systolic array architecture is presented which is suitable for implementing both forms of the filter. The systolic SRCF is found to be comparable with other architectures in the literature in terms of size, speed and processor utilization. The SRCP is faster than any comparable architecture withO(2n) timesteps between measurements.     

A novel algorithm and architecture for adaptive digital beamforming

A novel algorithm and architecture are described which have specific application to high performance, digital, adaptive beamforming. It is shown how a simple, linearly constrained adaptive combiner forms the basis for a wide range of adaptive antenna subsystems. The function of such an adaptive combiner is formulated as a recursive least squares minimization operation and the corresponding weight vector is obtained by means of theQ-Rdecomposition algorithm using Givens rotations. An efficient pipelined architecture to implement this algorithm is also described. It takes the form of a triangular systolic/wavefront array and has many desirable features for very large scale integration (VLSI) system design.     

Counseling psychology training directors: Responsibilities and benefits.

Reports the responses of 30 directors of accredited counseling psychology (CP) programs to a survey of (1) the duties and benefits of CP training directors, and the (2) duties and benefit differences for directors housed in schools/colleges of education vs departments of psychology. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Use of unidirectional data flow in bit-level systolic array chips

We show how the architecture of two recently reported bit-level systolic array circuits?a single-bit coefficient correlator and a multibit convolver?may be modified to incorporate unidirectional data flow. This feature has some important advantages in terms of chip cascadability, fault tolerance and possible wafer-scale integration.     

Psychotherapy for gay male couples

Although there is no specific therapy for gay male couples, this paper outlines the more critical issues therapists must understand to provide optimal treatment for gay male dyads. Additionally, the authors present new assumptions arising from their five year research study of 156 gay male couples living together from one to over 37 years. The most therapeutically useful finding is that stages of these relationships parallel stages of clinical development. Each stage has its own unique characteristics, stresses and benefits. Stages are affected by many influences, and individuals can be at different stages simultaneously.     

From Bit Level Systolic Arrays to HDTV Processor Chips

The initial part of this paper reviews the early challenges (c 1980) in achieving real-time silicon implementations of DSP computations. In particular, it discusses research on application specific architectures, including bit level systolic circuits that led to important advances in achieving the DSP performance levels then required. These were many orders of magnitude greater than those achievable using programmable (including early DSP) processors, and were demonstrated through the design of commercial digital correlator and digital filter chips. As is discussed, an important challenge was the application of these concepts to recursive computations as occur, for example, in Infinite Impulse Response (IIR) filters. An important breakthrough was to show how fine grained pipelining can be used if arithmetic is performed most significant bit (msb) first. This can be achieved using redundant number systems, including carry-save arithmetic. This research and its practical benefits were again demonstrated through a number of novel IIR filter chip designs which at the time, exhibited performance much greater than previous solutions. The architectural insights gained coupled with the regular nature of many DSP and video processing computations also provided the foundation for new methods for the rapid design and synthesis of complex DSP System-on-Chip (SoC), Intellectual Property (IP) cores. This included the creation of a wide portfolio of commercial SoC video compression cores (MPEG2, MPEG4, H.264) for very high performance applications ranging from cell phones to High Definition TV (HDTV). The work provided the foundation for systematic methodologies, tools and design flows including high-level design optimizations based on ”algorithmic engineering” and also led to the creation of the Abhainn tool environment for the design of complex heterogeneous DSP platforms comprising processors and multiple FPGAs. The paper concludes with a discussion of the problems faced by designers in developing complex DSP systems using current SoC technology.     

Incidence and recognition of malnutrition in hospital

OBJECTIVES: To determine incidence of malnutrition among patients on admission to hospital, to monitor their changes in nutritional status during stay, and to determine awareness of nutrition in different clinical units. DESIGN: Prospective study of consecutive admissions. SETTING: Acute teaching hospital. SUBJECTS: 500 patients admitted to hospital: 100 each from general surgery, general medicine, respiratory medicine, orthopaedic surgery, and medicine for the elderly. MAIN OUTCOME MEASURES: Nutritional status of patients on admission and reassessment on discharge, review of case notes for information about nutritional status. RESULTS: On admission, 200 of the 500 patients were undernourished (body mass index less than 20) and 34% were overweight (body mass index > 25). The 112 patients reassessed on discharge had mean weight loss of 5.4%, with greatest weight loss in those initially most undernourished. But the 10 patients referred for nutritional support showed mean weight gain of 7.9%. Review of case notes revealed that, of the 200 undernourished patients, only 96 had any nutritional information documented. CONCLUSION: Malnutrition remains a largely unrecognised problem in hospital and highlights the need for education on clinical nutrition.     

Two measures of the facilitative conditions: A correlation study.

45 counselor trainees were rated by coached clients using the Barrett-Lennard Relationship Inventory and by trained judges using the Truax rating scales. Correlation coefficients between the measures of empathy, warmth, genuineness and the total scores were not significant at the .05 level. Reasons for the results are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A causal model of the educational plans and career expectations of Mexican American high school girls.

A structural model predicting the educational and career expectations of 282 Mexican American high school girls was developed and then tested on samples of 247 Mexican American boys and 228 European American girls. Predictors included socioeconomic status, acculturation, academic achievement, instrumentality, expressiveness, gender role attitudes, parental and teacher support, family and career commitment, and perceptions of barriers. Results indicated that the initial model was plausible in the sample of Mexican American girls. Findings from the multiple-groups analyses provided evidence supporting the primacy of cultural influences over gender in predicting the educational and career expectations of Mexican American girls. (PsycINFO Database Record (c) 2010 APA, all rights reserved)