BLITZEN: A highly integrated massively parallel machine

The architecture and VLSI design of a new massively parallel processing array chip are described. The BLITZEN processing element array chip, which contains 1.1 million transistors, serves as the basis for a highly integrated, miniaturized, high-performance, massively parallel machine that is currently under development. Each processing element has 1K bits of static RAM and performs bit-serial processing with functional elements for arithmetic, logic, and shifting

Observations on the vibration of axially-tensioned elastomeric pipes conveying fluids

A study of the effect of axial tension on the vibration of a single-span elastomeric pipe clamped at both ends conveying fluid has been carried out both experimentally and theoretically. A new mathematical model using a penalty function technique and the method of kinematic correction and fictitious loads has been developed. The influence of flowing fluid and axial tension on natural frequencies and mode shapes of the system has been described using this model and compared with experimental observations. Linear and non-linear dynamic response of the harmonically excited pipe has also been investigated for varying flow velocities and initial axial tensions

Bimodality In Interim Reports: An Analysts' View

Cumulative abnormal residuals (cars) show how markets adjust to published information. Theoretically, cars are assumed to display unit normal behavior.  Despite its merits, car has proved to be a somewhat imprecise measure of market response to published information.  In practice, cars exhibit considerable deviation from theoretical unit normal behavior. Three disparities between theory and practice can be pinpointed.  These are car: (1) location, (2) shape, and (3) stability.  In our previous work we have demonstrated that cars are often bimodally distributed.  This finding shows one reason why it takes semistrong efficient markets some time to digest new information. Cars, for the time period during which markets analyze the new value determining data, are usually bimodally distributed. One mode of the distribution represents the impact of good news. The other peak is caused by bad news.  The valley, between the two peaks, indicates the influence of neutral news.  This paper analyzes the interim reports, which constitute the data for our previous related studies. This research identifies the type of new information that creates bimodal cars

Major determinants of Interim Disclosures in an Emerging Market

An interim financial reporting protocol became mandatory in Finland as recently as calendar year 1986. This makes the Helsinki Stock Exchange an excellent forum for the investigation of the determinants of periodic reporting in present day European conditions. It is hypothesized that the level of disclosure should be a function of a firm\u27s: governance structure, business risk, market risk, capital structure, stock price adjustment, growth, growth potential and size. As predicted, Finnish interim disclosure over the period 1985 to 1993 is directly related to the quantitative measures of business risk, capital structure, size and market maturity. One other hypothesis is confirmed. Governance is found to be inversely related to disclosure, suggesting that, the greater the institutional concentration of ownership of Finnish firms by other firms, the lower the degree of interim disclosure

Spectral geometry, homogeneous spaces, and differential forms with finite Fourier series

Let G be a compact Lie group acting transitively on Riemannian manifolds M and N. Let p be a G equivariant Riemannian submersion from M to N. We show that a smooth differential form on N has finite Fourier series if and only if the pull back has finite Fourier series on

Interaction of reed and acoustic resonator in clarinetlike systems

Sound emergence in clarinetlike instruments is investigated in terms of instability of the static regime. Various models of reed-bore coupling are considered, from the pioneering work of Wilson and Beavers ["Operating modes of the clarinet", J. Acoust. Soc. Am. 56, 653--658 (1974)] to more recent modeling including viscothermal bore losses and vena contracta at the reed inlet. The pressure threshold above which these models may oscillate as well as the frequency of oscillation at threshold are calculated. In addition to Wilson and Beavers' previous conclusions concerning the role of the reed damping in the selection of the register the instrument will play on, the influence of the reed motion induced flow is also emphasized, particularly its effect on playing frequencies, contributing to reduce discrepancies between Wilson and Beavers' experimental results and theory, despite discrepancies still remain concerning the pressure threshold. Finally, analytical approximations of the oscillating solution based on Fourier series expansion are obtained in the vicinity of the threshold of oscillation. This allows to emphasize the conditions which determine the nature of the bifurcation (direct or inverse) through which the note may emerge, with therefore important consequences on the musical playing performances

The basis for limited specificity and MHC restriction in a T cell receptor interface

αβ Tcell receptors (TCRs) recognize peptides presented by major histocompatibility complex (MHC) proteins using multiple complementarity-determining region (CDR) loops. TCRs display an array of poorly understood recognition properties, including specificity, crossreactivity and MHC restriction. Here we report a comprehensive thermodynamic deconstruction of the interaction between the A6 TCR and the Tax peptide presented by the class I MHC HLA-A*0201, uncovering the physical basis for the receptor’s recognition properties. Broadly, our findings are in conflict with widely held generalities regarding TCR recognition, such as the relative contributions of central and peripheral peptide residues and the roles of the hypervariable and germline CDR loops in engaging peptide and MHC. Instead, we find that the recognition properties of the receptor emerge from the need to engage the composite peptide/MHC surface, with the receptor utilizing its CDR loops in a cooperative fashion such that specificity, crossreactivity and MHC restriction are inextricably linked

An Analysis of the Impact of Varying Levels of Interim Disclosure on Finnish Share Prices within Five Days of the Announcement

This research examines the relationship between interim reports submitted to the Helsinki Exchanges and the share prices of reporting firms over the over the period 1985-93. The purpose of this investigation is to determine the differences in magnitude and timing of price changes associated with three levels of voluntary disclosure: (1) less-than expected, (2) about-as expected and (3) greater-than expected. The findings are that price adjustments begin on the announcement day for firms that report in magnitudes about-as expected. The share prices initially rise above the association period value, confirming DeBondt & Thaler (1985). Then, share prices decline to the association period value, confirming Daniel, Hirshleifer & Subrahmanyam (1998). This helps resolve an apparent empirical conflict. The reaction is delayed by one day for firms reporting in less-than expected amounts. The market reaction is delayed three days for firms reporting in greater-than expected magnitudes. This provides the additional insight that the amount of interim information disclosed matters to the investor: a finding that contradicts the efficient markets hypothesis (Fama, 1970). This research is concerned with the magnitude of reporting, only. Further insights may be gained in subsequent research focusing on the quality of the reports

Brownian Thermal Noise in Multilayer Coated Mirrors

We analyze the Brownian thermal noise of a multi-layer dielectric coating, used in high-precision optical measurements including interferometric gravitational-wave detectors. We assume the coating material to be isotropic, and therefore study thermal noises arising from shear and bulk losses of the coating materials. We show that coating noise arises not only from layer thickness fluctuations, but also from fluctuations of the interface between the coating and substrate, driven by internal fluctuating stresses of the coating. In addition, the non-zero photoeleastic coefficients of the thin films modifies the influence of the thermal noise on the laser field. The thickness fluctuations of different layers are statistically independent, however, there exists a finite coherence between layers and the substrate-coating interface. Taking into account uncertainties in material parameters, we show that significant uncertainties still exist in estimating coating Brownian noise.Comment: 26 pages, 18 figure

Nutrient interaction effects on yield and chemical composition of spinach and green beans

This report is based upon a thesis submitted by Mr. Blevins as partial fulfillment of a master of science degree from the College of Agriculture, University of Missouri-Columbia--P. [2].Digitized 2007 AES MoU.Includes bibliographical references (pages 22-23)