The effects of target spectrum, noise, and reverberation on auditory cue weighting in sound localization

Sound localization in the horizontal plane depends on interaural time difference (ITD) and interaural level difference (ILD) cues, which are both available in wideband sounds. Previous studies have directly measured listener weighting of those cues only under quiet, anechoic conditions, but not in the presence of noise and reverberation, which can degrade both ITD and ILD. This study examined the effects of changes in target spectral profile, background noise, and reverberation on sound localization performance and cue weighting strategies. Listeners reported locations of targets that were presented over headphones in virtual auditory space. ITD and ILD were manipulated by attenuating or delaying the sound at one ear, and their weighting was computed by comparing the listener’s localization response bias to the imposed cue bias. Results suggest that ITD dominates for any wideband target in quiet conditions, but that listeners increase their weighting of ILD in more adverse listening conditions

Representation formulas for maximal monotone operators of type (D) in Banach spaces whose dual spaces are strictly convex

This work deals with a maximal monotone operator $A$ of type (D) in a Banach space whose dual space is strictly convex. We establish some representations for the value $Ax$ at a given point $x$ via its values at nearby points of $x$. We show that the faces of $Ax$ are contained in the set of all weak$^*$ convergent limits of bounded nets of the operator at nearby points of $x$, then we obtain a representation for $Ax$ by use of this set. In addition, representations for the support function of $Ax$ based on the minimal-norm selection of the operator in certain Banach spaces are given.Comment: Comments are welcome

Differential spatial modulation for high-rate transmission systems

This paper introduces a new differential spatial modulation (DSM) scheme which subsumes both the previously introduced DSM and high-rate spatial modulation (HR-SM) for wireless multiple input multiple output (MIMO) transmission. By combining the codeword design method of the HR-SM scheme with the encoding method of the DSM scheme, we develop a high-rate differential spatial modulation (HR-DSM) scheme equipped with an arbitrary number of transmit antennas that requires channel state information (CSI) neither at the transmitter nor at the receiver. The proposed approach can be applied to any equal energy signal constellations. The bit error rate (BER) performance of the proposed HR-DSM schemes is evaluated by using both theoretical upper bound and computer simulations. It is shown that for the same spectral efficiency and antenna configuration, the proposed HR-DSM outperforms the DSM in terms of bit error rate (BER) performance

Geometrically nonlinear isogeometric analysis of laminated composite plates based on higher-order shear deformation theory

In this paper, we present an effectively numerical approach based on isogeometric analysis (IGA) and higher-order shear deformation theory (HSDT) for geometrically nonlinear analysis of laminated composite plates. The HSDT allows us to approximate displacement field that ensures by itself the realistic shear strain energy part without shear correction factors. IGA utilizing basis functions namely B-splines or non-uniform rational B-splines (NURBS) enables to satisfy easily the stringent continuity requirement of the HSDT model without any additional variables. The nonlinearity of the plates is formed in the total Lagrange approach based on the von-Karman strain assumptions. Numerous numerical validations for the isotropic, orthotropic, cross-ply and angle-ply laminated plates are provided to demonstrate the effectiveness of the proposed method

Exploring the corporate image formation process

Purpose - This paper aims to demonstrate the need to explore the image formation process to develop a more holistic definition of corporate image. Diminishing trust in managers has created increasingly negative perceptions toward corporations. Stakeholders are constantly evaluating and scrutinizing corporations to determine their trustworthiness and authenticity. To develop their perceptions toward these corporations, stakeholders rely on the key role of corporate image. In the present study, the complex relationships between corporate image, corporate reputation, corporate communication and corporate personality are investigated. These concepts form a corporation’s image formation process. Design/methodology/approach - Radley Yelday (RY), the communications agency collaborating in this research, facilitated 15 interviews with their employees. Using a semi structured interviewing method, discussions were guided toward the topic of corporate image among the respondents. Findings - Findings reveal the importance of corporate image under seven different dimensions: visual expression, positive feelings, environments expression, online appearance, staff/employees appearance, attitude and behavior and external communications (offline, online and effectiveness). Theoretical and managerial implications are discussed with suggestions for future researches. Originality/value - The authors develop a conceptual model that illustrates the corporate image formation process. The model includes seven dimensions – both with tangible and intangible aspects – forming corporate communication and corporate personality. These, in turn, translate into the corporate image. With time and experiences, corporate image creates a more consistent reputation, which consists of five different levels: awareness, familiarity, favorability, trust and advocacy. As demonstrated in this research, the seven key dimensions influencing this process are: visual expression, positive feelings, environment, online appearance, staff/employees appearance, attitude and behavior and external communications