Miracle-dz/UniFAR-FTUs huggingface dataset:
MMSE Bound for MIMO Channel

Detailed derivations of two bounds of the minimum mean-square error (MMSE) of complex-valued multiple-input multiple-output (MIMO) systems are proposed for performance evaluation. Particularly, the lower bound is derived based on a genie-aided MMSE estimator, whereas the upper bound is derived based on a maximum-likelihood (ML) estimator. Using the famous relationship between the mutual information (MI) and MMSE, two bounds for the MI are also derived, based on which we discuss the asymptotic behaviours of the average MI in the high-signal-to-noise ratio (SNR) regime. Theoretical analyses suggest that the average MI will converge its maximum as the SNR increases and the diversity order is the same as receive antenna number.
Multi-fidelity Stability for Graph Representation Learning

In the problem of structured prediction with graph representation learning (GRL for short), the hypothesis returned by the algorithm maps the set of features in the \emph{receptive field} of the targeted vertex to its label. To understand the learnability of those algorithms, we introduce a weaker form of uniform stability termed \emph{multi-fidelity stability} and give learning guarantees for weakly dependent graphs. We testify that ~\citet{london2016stability}'s claim on the generalization of a single sample holds for GRL when the receptive field is sparse. In addition, we study the stability induced bound for two popular algorithms: \textbf{(1)} Stochastic gradient descent under convex and non-convex landscape. In this example, we provide non-asymptotic bounds that highly depend on the sparsity of the receptive field constructed by the algorithm. \textbf{(2)} The constrained regression problem on a 1-layer linear equivariant GNN. In this example, we present lower bounds for the discrepancy between the two types of stability, which justified the multi-fidelity design.
An analysis of the factors affecting the sustainability of ICT4D initiatives

The sustainability of ICT for Development (ICT4D) initiatives remains an enduring concern, and projects typically have a high rate of failure. ICT4D is in flux and the trends are analysed to show how sustainability issues have changed from requirements for external support via governments or funding agencies to self-sufficiency (mainly) based on economic viability. Sustainability is typically defined in terms of financial, social, institutional, technological, and environmental aspects. The major factors influencing the sustainability of ICT4D projects in poor rural areas are summarised via a systems analysis. The questions posed by this analysis may be partially addressed by strategies based upon the concept of human scale development. Two ICT4D initiatives that are concerned with enterprise development are used to illustrate the practical realisation of aspects of such a strategy.
An Exact Method for Fortification Games

A fortification game (FG) is a three-level, two-player Stackelberg game, also known as defenderattacker-defender game, in which at the uppermost level, the defender selects some assets to be protected from potential malicious attacks. At the middle level, the attacker solves an interdiction game by depreciating unprotected assets, i.e., reducing the values of such assets for the defender, while at the innermost level the defender solves a recourse problem over the surviving or partially damaged assets. Fortification games have applications in various important areas, such as military operations, design of survivable networks, protection of facilities or power grid protection. In this work, we present an exact solution algorithm for FGs, in which the recourse problems correspond to (possibly NP-hard) combinatorial optimization problems. The algorithm is based on a new generic mixed-integer linear programming reformulation in the natural space of fortification variables. Our new model makes use of fortification cuts that measure the contribution of a given fortification strategy to the objective function value. These cuts are generated on-the-fly by solving separation problems, which correspond to (modified) middle-level interdiction games. We design a branch-and-cut-based solution algorithm based on fortification cuts, their strengthened versions and other speed-up techniques. We present a computational study using the knapsack fortification game and the shortest path fortification game. For the latter one, we include a comparison with a state-of-the-art solution method from the literature. Our algorithm outperforms this method and allows us to solve previously unsolved instances with up to 330 386 nodes and 1 202 458 arcs to optimality.
On identifiability of OFDM blind channel estimation

The technique of orthogonal frequency division multiplexing (OFDM) has received much attention as a promising scheme for use in future wireless mobile communications. A problem of blind channel estimation for coherent detection in OFDM systems is considered. It is shown in this paper that the channel is identifiable, given only a received data set obtained over one OFDM symbol duration. A sufficient condition for the channel to be identifiable is given, with outline of the proof included. In addition, a compact form of the maximum likelihood channel estimator for a PSK modulation scheme is derived. Experimental results are provided to demonstrate the performance of the proposed method.
Effect of placing a diffuser around a wind turbine

An actuator disc CFD model of the flow through a wind turbine in a diffuser is developed and validated. Further, it is shown theoretically from a 1D analysis that the Betz limit can be exceeded by a factor proportional to the relative increase in mass flow through the rotor induced by the diffuser. The theoretical 1D result is verified by the CFD model. Copyright © 2000 John Wiley & Sons, Ltd.
VHF broadband digital interferometer

Various techniques of direction-of-arrival (DOA) estimation for electromagnetic (EM) waves have been developed in accordance with the spread of wireless communications. Interferometry is one of the well-known DOA estimation techniques and it is traditionally used in the field of radio astronomy. Most of the DOA estimation techniques are, however, applicable only for quasimonochromatic waves. In other words, less attention is paid to the DOA estimation for wideband EM waves. Osaka University Lightning Research Group (LRG-OU) has been developing a new type of lightning location and monitoring system based on a technique of VHF broadband digital interferometry (DITF) since 1995. The VHF broadband DITF has been proposed by the group of New Mexico Tech [1] and LRG-OU [2,3] independently and simultaneously. The basic principle of this technique is the relative phase estimations for various frequency components of a broadband EM wave detected by a pair of antennas with proper separation like an antenna array. It should be noticed that the phase information of an EM signal, strictly speaking the phase difference between two antennas, enables us to calculate the angle of incidence of the EM radiation source against the antenna array. LRG-OU has been working on developing the system, and accomplished the experimental system. This chapter presents a summary of the broadband DITF.
Seismic Performance and Retrofit Evaluation of Reinforced Concrete Structures

A procedure for evaluating the seismic performance and retrofit of existing low-to-midrise reinforced concrete (RC) buildings is proposed. The procedure is derived from the well-known capacity spectrum method and is intended to provide practicing engineers with a methodology for estimating the margin of safety against structural failure. A series of seismic story demand curves is established from modal superposition analyses wherein changes in the dynamic characteristics of the structure at various response phases ranging from elastic to full failure mechanism are considered. These demands are compared to the lateral story capacities as determined from an independent inelastic pushover analysis. The distribution of lateral forces used in the progressive pushover analysis is based on stiffness dependent incremental story shear demands and forms a critical aspect of the methodology. The proposed technique is applied to a one-third scale model, three-story reinforced concrete frame building that was subjected to repeated shaking table excitations, and that was later retrofitted and tested again at the same intensities. This study indicates that the procedure can provide reliable estimates of story demands versus capacities for use in seismic performance and retrofit evaluation of structures.
Effects of Increased Omnichannel Integration on Customer Satisfaction and Loyalty Intentions

ABSTRACT We examine how the integration of retail channels affects crucial firm outcomes, such as customer satisfaction and loyalty intentions, with a particular focus on the impact of different levels of offline-to-online channel integration. Across three experimental studies, one of them in an operating physical store, accommodating comparisons of several omnichannel configurations, increasing the level of omnichannel integration positively influences customer satisfaction and loyalty intentions. Flow experience mediates the effects. The impact of increasing the level of omnichannel integration on customer satisfaction and loyalty intentions is more pronounced among consumers who perceive the channels as complementary and for consumers with a goal-directed shopping orientation. This article contributes to extant omnichannel literature by experimentally investigating the impact of increasing levels of omnichannel integration—as compared to adopting a binary, “either-or” approach—and by demonstrating that omnichannel retail environments provide a fertile ground for flow experiences in physical stores. Furthermore, this article establishes the role of perceived channel complementarity and shopping orientation as boundary conditions for the realization of flow in omnichannel retail environments.
MOVING FROM INJUSTICE TO EQUITY: A TIME FOR THE PHARMACY PROFESSION TO TAKE ACTION REVIEW Developing the “ Upstreamist ” through Antiracism Teaching in Pharmacy Education

Objective. To present antiracism teaching as a key modality and an upstream approach to addressing health disparities in pharmacy education. Relevant theoretical frameworks and pedagogical strategies used in other health disciplines will be reviewed to present how antiracism curricula can be integrated into pharmacy educational outcomes. Findings. Various disciplines have incorporated antiracism pedagogy in their respective programs and accreditation standards. While challenges to implementation are acknowledged, structural racism contin-ues to compromise health outcomes and should be centralized when addressing health disparities. Summary. Pharmacy curricula has explored and implemented cultural competency as a means to address the social determinants of health. By intentionally addressing racism in the context of health disparities, student pharmacists will further acknowledge racism as a public health issue and a systemic barrier to patient-centered care.
New results on linear prediction for clutter cancellation

Some moving-target indicator (MTI) techniques are reviewed and those based on the linear prediction theory are examined. A description is given of the effects of the position of the reference sample in an MTI processor on cancelling clutter in a radar system. The analysis of this generalized linear prediction MTI is based on the evaluation of the receiving operating characteristics (ROCs), assuming that the clutter covariance matrix is known a priori as well as the matrix being estimated on line. It is shown by analytical evaluations and Monte Carlo simulations, that the performance is generally insensitive to the position of the reference sample. An additional analysis is carried out to compare the performance of the generalized linear prediction MTI with the MTI based on the Hsiao approach. It is seen that with the formation of the interference of two superimposed clutter sources the generalized linear prediction MTI suffers, in some cases, several decibels of loss. >
Directional reflectance and more accurate prediction of tubular light guide efficiency

The main chracteristic of the light guide is the tube's efficiency of the dalylight transport into the building interior. It mainly depends on the reflectance of the inner high-reflective layer. Reflectance of metalic materials is related to their complex refractive index and it depends on the wavelengh of the incident light, on the angle of incidince and on the light polarisation. Using Fresnel equations, we are able to determine directional reflactance of the layer and improve the accuracy of the calculations for the light tube's efficiency in various daylight conditions. Streszczenie. Glowną charakterystyką światlowodu jest skutecznośc rury wprowadzającej światlo dzienne do wnetrza budynku. Zalezy ona przede wszystkim od stopnia odbicia strumienia świetlnego wewnetrznej powloki refleksyjnej. Stopien odbicia powloki jest powiązany z calkowitym wspolczynnikiem zalamania i zalezy od dlugości fali padającego światla, kąta padania i polaryzacji światla. Wykorzystując rownania Fresnela określiliśmy skladową odbicia kierunkowego powloki i poprawiliśmy dokladnośc obliczen skuteczności rury świetlnej dla roznych warunkow oświetlenia dziennego. (Odbicie kierunkowe i dokladniejsza predykcja skuteczności światlowodu tubularnego)
Working-Class Women, Gender, and Union Politics in Turkey, 1965–1980

Abstract This paper focuses on the ideology and discourses of Tekstil İṣçileri Sendikası (the Textile Workers’ Union, Tekstil) in Turkey to highlight some of the specific visions of the organized labor for an emancipatory gender politics during the 1970s. This history of intersection between gender and working-class organizing has been overlooked by the Left scholarship on the one hand and liberal feminist scholarship on the other. This paper addresses this gap in the literature by highlighting gender and class concurrently throughout the history of the transformation of gender politics in labor organizations. The history of the simultaneous development of gender-related policies in Tekstil/DİSK and TEKSİF/Türk-İṣ reveals an unexplored aspect of the contentious dynamic between rival labor organizations. Between 1975–1980, the politics of gender became another pillar in trade union competition. Following the transnational influences in this transformation, this paper highlights a forgotten period of labor organizing and locates it within the history of labor and women's movements at the national and global scale.
2D segmented large inkjet printhead for high speed 3D printers

Three-dimensional (3D) printing is a fast-developing technology these days. However, 3D printing of a model takes many hours. Therefore, the enlargement of the printhead and the increase of the printing speed are important to this technology. In order to enable the enlargement of the printhead a different approach and design are suggested and tested experimentally. The printhead is divided into small segments; each one is autonomous, and not fluid-connected to the neighboring segment. Each segment contains a micro reservoir and few nozzles. The segments are manufactured together in close proximity to each other on the same substrate enabling area coverage. A segmented printhead based on this approach was built and tested. The micro reservoir ink-filling method and operation of the segments were experimentally proven. Ink drops were obtained and the lifetime of the resistors was measured. Electrical characteristics of power and energy for proper operation were obtained. A 3D model printed according to the suggested approach can be completed in less than a minute.
Enhanced Reliability for Winding Machine via New Fault Tolerant Control Based on RST-Backstepping Controller

Abstract Due to the external disturbances, model uncertainties, strong coupling, and occurred faults, the winding machine presents a great control challenge. In order to deal with these problems, this paper presents the formulation of a novel scheme of fault tolerant control (FTC) for three-motor web-winding systems; it is concerned with the nonlinear robust backstepping control based on the combination of RST and backstepping controllers where the process is modelled by a nonlinear model. The main contribution of the paper is that the approach developed here summarises the performance of RST and backstepping controllers in order to design a robust controller capable of eliminating external disturbances and sensor faults affecting the system. The stability of the whole system is proven using the Lyapunov theory. Finally, analysis in comparison with the conventional backstepping controller and simulations in the MATLAB environment are accomplished to confirm the efficiency of the proposed method.
Educational Expansion, Social Class, and Choosing Latin as a Strategy of Distinction

Abstract In times of educational expansion, privileged families are looking for new strategies of distinction. Referring to Pierre Bourdieu’s theory of distinction, we argue that choosing Latin at school – a language that is no longer spoken and therefore has no direct value – is one of the strategies of privileged families to set themselves apart from less privileged families. Based on two surveys we conducted at German schools, the paper analyzes the relationship between parents’ educational background and the probability that their child will learn Latin. Results indicate that historically academic families have the strongest tendency towards learning Latin, followed by new academic families, and leaving behind the non-academic families. We distinguish between four causal mechanisms that might help to explain these associations: cultural distinction, selecting a socially exclusive learning environment, beliefs in a secondary instrumental function of learning Latin, and spatial proximity between the location of humanist Gymnasiums and the residential areas of privileged families. The hypotheses are formalized by means of Directed Acyclic Graphs (DAG). Findings show that the decision to learn Latin is predominately an unintended consequence of the selection of a socially exclusive learning environment. In addition, there is evidence that especially children from historically academic families learn Latin as a strategy of cultural distinction.
Assessment, learning, teaching and internationalisation - engaging for the future

The intersections between assessment, learning, teaching and internationalisation are important sites of engagement for students. Engagement, the extent to which students participate in purposeful learning activities, is frequently linked to the quality of student learning outcomes (Coates, 2005). It is here that the internationalisation agenda of universities connects with students who, as graduates, will take their place as citizens and professionals in an increasingly connected world. Engaging students with the internationalisation agenda of universities now will have an impact on their future lives and has the potential to have a broader impact on society. Thus it is timely that this special issue of the Assessment, Learning and Teaching Journal focuses on the theme of internationalisation. In this paper I will briefly examine the meaning of the term ‘internationalisation’ in higher education and then move on to discuss issues associated with assessment, learning, teaching and internationalisation.
A Comparative Assessment of Service Quality Perspectives and Satisfaction in Ports: Evidence from Nigeria

The study presents the findings on the effect of service quality on port users’ satisfaction from two distinct methodological perspectives. The study utilized a sample of Nigerian shippers wherein service quality is operational via two distinct measures – SERVQUAL and Technical/Functional Quality. These two service quality measures are compared and contrasted as to their ability in predicting port users’ satisfaction in Nigerian ports. To assess the validity of these findings, two moderators of the service-quality/port user’s satisfaction relationship are introduced and evaluated. Finally, the authors examine the potential utility of employing separate measures for port users’ satisfaction from the perspectives of both technical and functional aspects of the service delivery process. Overall, the authors' findings are of importance to port managers as they strive to identify efficient and effective approaches for improving quality.
Warts-and-all: the real practice of service design

Service design practice, discourse and education are still nascent in Australia where most designers are trained in fields such as industrial design, architecture, communication design, and to a lesser degree, interaction design (a field that is equally nascent). Academic research on service design has so far been limited (Kimbell and Seidel 2008) and much of the knowledge generated from business contexts has been proprietary (Tether 2008). These factors have led to a lack of critical engagement in examining and investigating the complex contexts that surrounds service design projects. This also adds to the challenging obstacles for designers seeking to establish and embarking upon a service design-led practice in Australia.
Impact of CSI variation in subband on performance of vector perturbation based MU MIMO-OFDM system

: Because of limitation of channel state information (CSI) feedback resource, multiuser (MU) MIMO-OFDM system usually divides all usable subcarriers into several subbands and the CSI of middle subcarrier of each subband is fed back. This feedback style generates CSI error among each subband. Due to this CSI error, a MU MIMO-OFDM system based on vector perturbation (VP) yields ineﬃ-cient perturbation vectors (PVs) and mismatched spatial ﬁlters, which cause severe performance degradation. In this letter, we show that the performance degradation is mainly caused from the mismatched spatial ﬁlters rather than the ineﬃcient PVs. This result is useful to design of a computational complexity reduction for the VP based system by reducing the matrix operations for PV search.
Impact of Acquisition Announcement on Shareholders’ Wealth- A Case Study of Lupin Ltd

There has been a significant growth in terms of mergers and acquisitions in Indian Pharmaceutical Industry. The firms in the industry have started adopting mergers and acquisitions as a tool for improving their financial and operating performances. With this background, the present study explores the reaction of the investors on the announcement of acquisition of GAVIS Pharmaceutical by Lupin Ltd. The study used an event study approach which examines the impact of acquisition announcement on the shareholders’ wealth of acquiring firm. Lupin ltd had announced the acquisition of GAVIS Pharmaceuticals on 23rd July, 2015. The impact of the acquisition has analyzed with the calculation of abnormal returns (AR), cumulative average abnormal return (CAAR) earned by the shareholders of acquiring firm. The results of the study showed a significant negative return generated by the acquisition which indicates that the acquisition has failed to create the wealth to the shareholders of acquiring firm (Beena-2004).