Miracle-dz/UniFAR-FTUs huggingface dataset:
A SYSTEMATIC LITERATURE REVIEW OF THE IMPACT OF ORGANIZATIONAL STRUCTURE ON FIRM PERFORMANCE

The objective of this paper is to determine the impact of a firm’s organizational structure on its performance, measured through both financial and non-financial dimensions. A systematic literature review was carried out using a total of 35 articles from select management, finance and other relevant journals. Finalized articles included data and findings from a multitude of different geographic locations, industries and firm sizes. For analysis, a range of organizational structures were considered, including organizational structures comprised of hybrid internal systems. Similarly, performance was analyzed including both objective and subjective measures. Findings of this review were categorized into three items; positive effect of organizational structure on firm performance, partial effect of organizational structure on firm performance and no effect of organizational structure on firm performance. Results of finalized articles reviewed were illustrated by means of a table with relevant data. No conclusive relationship between firm structure and performance was established therefore suggestions were made for future research.
A Fuzzy Probabilistic Model for the Generalized Hough Transform

A fuzzy-probabilistic model of the generalized Hough transform (GHT) based on qualitative labeling of scene features is presented. Qualitative labeling of scene features is shown to be effective in pruning the search space of possible scene interpretations and also reducing the number of spurious interpretations explored by the GHT. Qualitative labeling of scene features is shown to result in the formulation of a weighted generalized Hough transform (WGHT) where each match of a scene feature with a model feature is assigned a weight based on the qualitative attributes assigned to the scene feature. These weights are looked upon as membership function values for the fuzzy sets defined by these qualitative attributes. A fuzzy-probabilistic model for the WGHT is presented. Analytical expressions for the probability of accumulation of random votes are derived for the WGHT and compared with the corresponding expressions for the conventional GHT. The WGHT is shown to perform better than the conventional GHT. Experimental results on intensity and range images are presented. >
Measurement of electroweak processes in muon decay channels, in pp collisions at √s=7 TeV, in the CMS experiment at LHC

This thesis covers different aspects of the Compact Muon Solenoid (CMS) operation and data analysis, always with muons as the common factor. The calibration and characterization of the drift tube chambers (DTs), one of CMS muon detectors, carried out in the pre-collision era, is presented in this thesis. To complete the calibration of the muon detection and measurement the calibration of muon momentum using electroweak data is shown. In particular, the clean sample that Z bosons coming from collisions represent is used to study the momentum scale and resolution of the CMS muon spectrometer. Finally, electroweak precision measurements are shown. The inclusive electroweak boson production cross section is the first electroweak measurement published by CMS. In this thesis, the inclusive W boson production cross section in the muonic channel with the whole 2010 data is measured. As a further step in the study of the W production, this time accompanied by jets, the analysis of the exclusive final state W+quark jets is both challenging and interesting from the physical point of view. The separation of W+quark from other W+quark jets is successfully achieved using c-tagging techniques what are new in CMS and useful for any other c jet studies. This analysis can constraint the quark strange content in the proton. Prospects to improve the measurement with 2011 data, as well as important distributions with 2 fb−1 are also reviewed in the last part of the thesis.
Elastic settlements under linear surface pressures on rectangular areas

This paper presents the practical closed‐form solutions for elastic settlement under the linear full‐contact pressures on rectangular areas resting upon an elastic mass. The linear pressure distribution is mostly assumed in practice for the rectangular footing having biaxial bending. The equations presented here are determined by evaluating the integration of Steinbrenner's strain approximation based on the stress solutions from the Boussinesq equations. The presented formulae are validated to be used for the elastic settlement under any point of linear full‐contact loading, triangular and embankment types of pressure cases. In this respect, it represents a significant step forward in the understanding of elastic settlement and rotation under the practical loading cases. The presented solutions are concise and easy to use. The numerical examples are demonstrated and the resulting influence factors in graphical forms are presented for their practical use especially in the elastic settlement calculations of rectangular footing subjected to the biaxial bending. Copyright © 2008 John Wiley & Sons, Ltd.
Understanding the Discrete Element Method: Simulation of Non-Spherical Particles for Granular and Multi-body Systems

Understanding the Discrete Element Method: Simulation of . Understanding the Discrete Element Method: Simulation of . Understanding the Discrete Element Method: Simulation of . Understanding the Discrete Element Method eBook by Hans . Understanding the Discrete Element Method : Simulation of . Pharmaceutical Powder Process Modeling using DEM Discrete element method Wikipedia Understanding the Discrete Element Method: Simulation of . Understanding The Discrete Element Method Modelling Complex Particle–Fluid Flow with a Discrete . Understanding the Discrete Element Method | Wiley Online Books (PDF) Understanding the Discrete Element Method . Understanding the discrete element method : simulation of .
Attractor neural networks with biological probe records

We present an attractor neural network which can associatively retrieve a variety of activity patterns encoded in the synaptic matrix between the excitatory neurons. The neurons are characterized by an absolute refractory period of 2 ms and would at saturation emit spikes at a rate of 500 s−1, yet the collective operation of the network allows stable retrieval performance at rates as low as 20–25 s−1. The network is presented as a model of increasingly realistic neurons assembled in a network with increasingly realistic output structures, on which a variety of experiments can be carried out.The types of features included are: continuous dynamics of the membrane potential except at spike emission; differentiation of excitatory and inhibitory operation; relative refractory period, due to post-spike hyperpolarization; membrane potential decay constants; uniform or random spike transmission delays; inhibition by hyperpolarization or by shunting; short and persistent stimuli, represented as synaptic currents i.
Robust maximum-likelihood estimation of structured covariance matrices

In many situations some information about the structure of the covariance matrix of a random process is known beyond the fact that it is symmetric and positive definite; for instance, the matrix is frequently Toeplitz. Many people have considered the structured covariance matrix estimation problem for Gaussian processes. However, in actual practice, random signals are seldom, if ever, Gaussian. By using a generalization to processes with known non-Gaussian densities, the authors demonstrate how to find the maximum-likelihood estimate of complex Toeplitz covariance matrices and then evaluate the use of this estimate in some passive array beamforming algorithms. There is substantial improvement in the performance of these bearing estimation algorithms when the authors' estimate is used, especially when non-Gaussian noise is present. <<ETX>>
Eikonal waves, caustics and mode conversion in tokamak plasmas

Ray optics is used to model the propagation of short electromagnetic plasma waves in toroidal geometry. The new RAYCON code evolves each ray independently in phase space, together with its amplitude, phase and focusing tensor to describe the transport of power along the ray. Particular emphasis is laid on caustics and mode conversion layers, where a linear phenomenon splits a single incoming ray into two. The complete mode conversion algorithm is described and tested for the first time, using the two space dimensions that are relevant in a tokamak. Applications are shown, using a cold plasma model to account for mode conversion at the ion-hybrid resonance in the Joint European Torus.
Simulation optimization via kriging: a sequential search using expected improvement with computing budget constraints

Metamodels are commonly used as fast surrogates for the objective function to facilitate the optimization of simulation models. Kriging (or the Gaussian process model) is a very popular metamodel form for deterministic and, recently, stochastic simulations. This article proposes a two-stage sequential framework for the optimization of stochastic simulations with heterogeneous variances under computing budget constraints. The proposed two-stage framework is based on the kriging model and incorporates optimal computing budget allocation techniques and the expected improvement function to drive and improve the estimation of the global optimum. Empirical results indicate that it is effective in obtaining optimal solutions and is more efficient than alternative metamodel-based techniques. The framework is also applied to a complex real ocean liner bunker fuel management problem with promising results.
Analytic Form of the Six-Dimensional Singularity Locus of the General Gough-Stewart Platform

The determination of the 6D singularity locus of the general Gough-Stewart platform is discussed in this article. The derivation of the velocity equation and the corresponding Jacobian matrices is first presented. Then a new procedure is introduced to obtain the analytical expression of the singularity locus, which is a function of six variables (x,y,z.,Φ,θ,ψ), using the velocity equation. Examples are also given to illustrate the results obtained. Gough-Stewart platforms can be used in several robotic applications as well as in flight simulators. The determination of the singularity locus is a very important design and application issue.
Towards automatic crack segmentation in 3d concrete images

Concrete is one of the most commonly used construction materials. A deeper insight into its mechanical properties, in particular cracking behaviour, can be gained from stress tests. Computed tomography captures the microstructure of building materials, including crack initiation and propagation in a fully three-dimensional manner. However, the complex microstructure of concrete renders crack segmentation a very challenging task. Both, the validation of segmentation methods and the training of machine learning approaches, are hindered by the lack of reliable ground truth segmentations for real data sets. To overcome this problem, a novel procedure for generating pairs of semi-synthetic images and ground truth was introduced by the authors in a previous study. Using this semi-synthetic data, Hessian-based percolation and 3d U-net were identified as the most promising of eight approaches for crack segmentation. Here, we discuss adaptions of the methods that allow for a handling of additional features observed in real computed tomography data of concrete, in particular local variations in crack thickness.
Comprehensive Trend Analysis of Past Century Indian Summer Monsoon Rainfall and its Variability

The importance of rainfall for an agrarian economy like India is quite well known, especially during the Indian summer monsoon months viz. June through September. Analysis of rainfall characteristics over the past century can present an idea of the variability of rainfall. Variability of rainfall has been observed in intraseasonal as well as intra-annual time scales. This study is aimed at comprehensively analyzing the annual as well as seasonal rainfall trends over India and different homogenous rainfall regions of India over a period of 119 years (1901-2019). Results from the study infer that there has been an increasing trend in rainfall over low rainfall regions such as northeast India there is a decreasing trend over central and northeastern India. The annual rainfall and monsoon rainfall over India as a whole present an increasing trend but the number of extreme rainfall years have increased in recent times. A major concern of decreasing rainfall has been observed over central India where there is a decreasing rainfall trend with an increase in the number of break days over the past 30-40 years. Major findings of this study are that the number of excess/deficit monsoon seasons has rapidly increased post-1960 with more deficit rainfall years.
Hyperfine structure in La II odd configuration levels

In this work results of the laser-induced fluorescence measurements of the hyperfine structure for 22 electronic levels belonging to the odd configurations of lanthanum ion La II, hitherto not investigated or investigated with lower precision, are presented. The results obtained have been applied in semi-empirical calculations of fine and hyperfine structure radial parameters, performed within the basis of 42 configurations.
Eight-micron period bubble devices

Magnetic bubble shift register devices of 68 121- and 266 473-bit capacity have been fabricated and tested. The epitaxial garnet bubble films were nominally 1.7 μm thick, supported nominally 1.7-μm diameter bubbles, and had collapse fields of about 260 Oe. The storage area per bit was 64 μm2, which was realized with a minimum coded feature dimension of 1 μm and contact photolithography using EBES chrome masters. Initial yields obtained in two experimental batches each of the two chip capacities are discussed. Parametric test results are presented for generator current, transfer current and phase, and rotating field intensity. Nominal values have been established to be 130-mA generate current, 21-mA transfer current, and 60-Oe drive. The detector signals were about half as large as normally obtained from 3.3-μm bubble devices with comparable resistance and conventional design.
State feedback stabilisation of networked control systems

This study addresses the state feedback stabilisation problem for networked control systems (NCSs) with time delays and packet losses. By introducing the concept of ‘effective sensor packet’, a new discrete-time switched model is formulated, and the sufficient conditions for the asymptotical stability of the closed-loop system are derived. An iterative algorithm is proposed to design the corresponding stabilising controller, and the synthesis method is also extended to the servo control case. The proposed method can be easily implemented to various applications, since it is simple and has no assumptions on the time delays model and the packet losses model. Simulation and experimental results are given to demonstrate the effectiveness of the proposed approaches.
COVID-19 anti-Asian racism, perceived burdensomeness, thwarted belongingness, and suicidal ideation among Asian American Emerging Adults

Abstract Since the start of the COVID-19 pandemic, there has been a significant surge in COVID-19 related anti-Asian racism and hate crimes. Given the ostracising and dehumanising narrative of COVID-19 related anti-Asian hate, we examined whether COVID-19 anti-Asian racism would be associated with suicidal ideation through increased thwarted belongingness and perceived burdensomeness among Asian American emerging adults. With data from 139 participants (Mage = 23.04), we conducted a path analysis of COVID-19 anti-Asian racism (four items) predicting suicidal ideation (item nine; Patient Health Questionnaire-9) via perceived burdensomeness and thwarted belongingness (Interpersonal Needs Questionnaire). COVID-19 anti-Asian racism significantly predicted suicidal ideation. The indirect effect through perceived burdensomeness was significant but not through thwarted belongingness; greater COVID-19 anti-Asian racism was associated with greater perceived burdensomeness, which in turn was associated with greater suicidal ideation. The significance of perceived burdensomeness was substantiated given the non-significant direct effect. The results suggest that the ongoing COVID-19 anti-Asian racism may be an alarming risk factor for suicidal ideation for Asian American emerging adults.
An Empirical Model of the Effects of Curvature and Convergence on Dilution Jet Mixing

An existing empirical model of the temperature field downstream of single and multiple rows of jets injected into a confined crossflow has been extended to model the effects of curvature and convergence on the mixing. This extension is based on the results of a numerical study of these effects using a 3-D turbulent flow computer code. Temperature distributions calculated with the empirical model are presented to show the effects of flow area convergence, radius of curvature, and inner and outer wall injection for single and opposed rows of jets.
Cancer Stem Cells as the Key to Cancer: Special Emphasis on Prostate Cancer

Recent research into cancer stem cells has refined our knowledge of the origins, maintenance, and progression of cancer. The characteristics of tumor initiating cells and the stem-like properties of tumor side populations that appear to be responsible for tumor maintenance and metastasis have given insights into potential targets for the elimination of treatment-resistant and residual tumor cells. These insights have also provided inroads to understanding and preventing invasive and metastatic progression of cancer. In this review, we discuss recent advancements in understanding of tumor initiating cells and cancer stem cells and their implications on cancer pathobiology and treatment. The role of tumor initiating cell phenotypes on routes of metastasis and the use of stemness markers to guide prognosis and treatment are also discussed. Particular emphasis sections are included that focus on the role of stemness in the pathobiology and treatment of prostate cancer. Of particular interest is the correlation of stemness with decreased androgen receptor expression and resistance to anti-androgen therapy. The overview provided herein represents a primer for the understanding of current knowledge regarding cancer stem cells and their clinical implications in prostate and other cancer types.
Dual-band, parabolic, slotted ground plane-directive antenna for WLAN applications

Wireless local area network (WLAN) is one of the common terms used by researchers in the communications area that allows wireless, long-range communication. Antennas are used as a medium of transmission, and in recent WLAN applications, manufacturers have tended to use antennas which are small, have simple structures, are inexpensive, and can operate at several sets of frequencies. In this paper, a dual-band antenna with defected ground plane structure is introduced. With the proposed combination of slots in its radiating element and defected ground plane, the antenna can operate at two frequency bands 2.45 and 5.8 GHz and direct the main beam at 30° at these respective bands. Simulated results and measurements show good agreement in terms of return loss and radiation pattern.
Chicana/Latina feminista plática methodology as a praxis of solidarity for Black women and women of color contingent faculty at a predominantly white institution (PWI)

Abstract Rooted in the history of women of color feminisms along with the everyday pedagogical practices that occur in Chicanx/Latinx communities, CLF plática methodology stems from the recognition that Chicanx/Latinx communities are experts of their lives who engage in knowledge production and theory every day. In this conceptual essay, we explore how utilizing a CLF plática methodology while working as contingent faculty at a PWI in north Texas helped us to craft a praxis of solidarity that: developed community; provided a relationship and the space to strategize on how to respond to white supremacist violence; presented opportunities to discharge and heal; as well as opportunities to celebrate and engage in collaborative mentorship and now, collaborative research with each other.
Dual frequency operation of a blue phase liquid crystal

The authors demonstrate dual frequency switching in a cubic blue phase liquid crystal. The dual frequency blue phase was prepared by adding a strongly twisting chiral dopant to a dual-frequency nematic liquid crystal mixture. The crossover frequency appeared at few hundred kHz in the blue phase, and sub-millisecond response was obtained for dual-frequency operation, which was comparable to conventional voltage operation. This new class of material is advantageous over conventional blue phases in polarization-independent phase modulation devices, since a larger lattice deformation can be obtained.
On shear viscosity and the Reynolds number of magnetohydrodynamic turbulence in collisionless magnetized plasmas: Coulomb collisions, Landau damping, and Bohm diffusion

For a collisionless plasma, the magnetic field B enables fluidlike behavior in the directions perpendicular to B; however, fluid behavior along B may fail. The magnetic field also introduces an Alfven-wave nature to flows perpendicular to B. All Alfven waves are subject to Landau damping, which introduces a flow dissipation (viscosity) in collisionless plasmas. For three magnetized plasmas (the solar wind, the Earth’s magnetosheath, and the Earth’s plasma sheet), shear viscosity by Landau damping, Bohm diffusion, and by Coulomb collisions are investigated. For magnetohydrodynamic turbulence in those three plasmas, integral-scale Reynolds numbers are estimated, Kolmogorov dissipation scales are calculated, and Reynolds-number scaling is discussed. Strongly anisotropic Kolmogorov k−5∕3 and mildly anisotropic Kraichnan k−3∕2 turbulences are both considered and the effect of the degree of wavevector anisotropy on quantities such as Reynolds numbers and spectral-transfer rates are calculated. For all three .
Fabrication and characterization of Na0.5K0.5NbO3-CuNb2O6 lead-free step-down piezoelectric transformers

Lead-free (Na0.5K0.5)NbO3 (NKN) ceramics doped with 1 mol% CuNb2O6 (01CN) ceramics were prepared using the conventional mixed oxide method at a sintering temperature of 1075 °C. NKN + 1 mol% CuTa2O6 (NKN-01CN) ceramics sintered at 1075 °C exhibit excellent “hard” piezoelectric properties of kp = 40%, kt = 45%, and k33 = 57%, with ferroelectric property Ec = 23 kV/cm. The mechanical quality factor (Qm) is extraordinarily high (1933) and the temperature stability is excellent (Temperature coefficient of frequency (TCF) = −154 ppm/°C). The piezoelectric transformer (PT) was fabricated on NKN-01CN lead-free substrates, and the electrical characteristics were investigated. The devices were simplified into an equivalent circuit and analyzed using the MATLAB software package. The simulation results matched the experimental results. By reversing the input and the output, the step-down PT can be easily fabricated using a simple disk-type structure. A maximum efficiency of 93% with a voltage gain of 0.12 was measur.