Miracle-dz/UniFAR-FTUs huggingface dataset:
Model-Based Pre-Distortion for Signal Generators

Spectrally pure signals are an indispensable requirement when the Signal Generator (SG) is to be used as part of a test bed. However, even sophisticated equipment may not comply with the needs imposed by certain applications. This work approaches the problem by using Digital Pre-Distortion (DPD) based on a polynomial memory-less model obtained for the SG.Using the SG in arbitrary mode (ARB) an input signal is computer-generated and reproduced by the SG. Measurement accuracy is ensured using coherence sampling and grid matching to the Signal Analyzer (SA). Finally, careful time alignment is used to compare the transmitted and received three-tone signals to obtain the polynomials coefficients.Results show that the accuracy of the model and the effectiveness of pre-distortion may vary depending on the amplitude of the three-tone signal. However, using polynomials of 5th and 9th degrees up to 15dB reduction of the 3rd order Inter-Modulation products can be obtained, and spurious powers may be lowered down to 70dBc.
Horn loudspeakers nonlinearity comparison and linearization using volterra series

The characterization of a weakly nonlinear electroacoustic device with usual methods of measurement (THD, intermodulation) does not illustrate the nonlinearities themselves, but only some of their effects. Device linearization can be achieved by applying the inverse nonlinearity upstream of the device, under the condition that the nonlinearity law is known in detail. This paper presents nonlinearities behavior comparison of horn loudspeakers of different frequency ranges using an experimental method of weak nonlinearity characterization and compensation, based on a representation of the nonlinearity by Volterra series using multitone excitations.
Do Dutch Musea Compete Or Cooperate

This paper looks into the effect of distance on market shares of Dutch museums. To this end, we assume a generic distance decay function for all museums. In addition, we allow for spatial dependence between museums to account for local competition or synergy effects. Using a unique transaction database with the visiting behavior of 80,821 museum cardholders to 108 Dutch museums, we are able to calculate market shares of each museum in all 484 Dutch municipalities. To account for possible measurement error in the market shares, we adopt a spatial two error component model. Finally, we allow for additional heterogeneity by segmenting the 108 museums using a mixture approach. Without segmenting, preliminary results indicate positive spatial dependence between museums, which points to the conclusion that -- in general -- museums benefit from each others presence.
Evaluation of the 2010 Toyota Prius Hybrid Synergy Drive System

Subsystems of the 2010 Toyota Prius hybrid electric vehicle (HEV) were studied and tested as part of an intensive benchmarking effort carried out to produce detailed information concerning the current state of nondomestic alternative vehicle technologies. Feedback provided by benchmarking efforts is particularly useful to partners of the Vehicle Technologies collaborative research program as it is essential in establishing reasonable yet challenging programmatic goals which facilitate development of competitive technologies. The competitive nature set forth by the Vehicle Technologies Program (VTP) not only promotes energy independence and economic stability, it also advocates the advancement of alternative vehicle technologies in an overall global perspective. These technologies greatly facilitate the potential to reduce dependency on depleting natural resources and mitigate harmful impacts of transportation upon the environment.
Double-gate SOI MOSFET fabrication from bulk silicon wafer

The double-gate SOI structure is believed to be the most scalable technology down to the 0.02/spl mu/m regime. However, experimental study of double-gate related phenomena has been hindered by the difficulties in fabricating double-gate devices. In this paper, a simple and yet flexible method to fabricate an experimental double-gate device is proposed. The double-gate device is actually fabricated on a silicon film recrystallized from amorphous silicon (referred as large grain polysilicon-on-insulator or LPSOI film), which is not truly single crystal SOI. However, material and device characteristics show that the film is equivalent to single crystal SOI film with high defect density, like SOI wafers produced in the early days. Thus, all physical properties of double gate SOI devices are preserved.
Color interpretation is guided by informativity expectations, not by world knowledge about colors

When people hear words for objects with prototypical colors (e.g., ‘banana’), they look at objects of the same color (e.g., lemon). However, the experimental record also shows that when people speak, they tend to omit prototypical colors, using color adjectives when it is informative (e.g., when referring to clothes). These findings yield an interesting prediction, which we tested here: People may look at yellow objects when hearing ‘banana’, but they should look away from bananas when hearing ‘yellow’. The results of an online sentence-completion task (N=100) and an online eye-tracking task (N=41) confirmed that when presented with truncated color descriptions (e.g., ‘Click on the yellow.’), people anticipate clothing items rather than stereotypical fruits. A corpus analysis ruled out the possibility that this association between color and clothing arises from simple co-occurrence statistics. We conclude that comprehenders make linguistic predictions based not only on what they know about the world (e.g., which objects are yellow) but also on what speakers tend to say about the world (i.e., their informativity expectations).
Spatiotemporal arrayed MIMO radar

In the last decade, Multiple Input Multiple Output (MIMO) radar has emerged as a leading candidate for stimulating major new advancement in radar theory. A fundamental challenge in MIMO radar is to identify a theoretical framework within which the radar system may be represented and analysed. In the relatively well-established field of Single Input Multiple Output (SIMO) array signal processing, this task has already been achieved using the array manifold (which is a geometric object that completely characterises the array system). A central objective of this thesis is therefore to bridge the gap between SIMO and MIMO by developing a manifold representation of the MIMO radar system. A new differential geometric framework, based on the complex Cartan matrix, is exploited in this thesis for characterising array manifold curves. New formulas are presented for recursively calculating the strictly orthonormal moving frame, U(s), and corresponding complex Cartan Matrix, C(s), for arbitrary array geometries. The circular approximation of the array manifold is derived under this new framework and compact closed-form expressions are provided for the popular uniform linear array geometry. Based on a number of approximations derived using the circular approximation of the array manifold, the performance capabilites of various popular detection and parameter estimation algorithms are investigated. The figure of merit “C”is then used to place these capabilities into the context of the theoretically ideal algorithm. The concept of a virtual SIMO array system is used as a basis for characterising the full MIMO radar configuration using a single equivalent response vector. By tracing out this response vector across the whole parameter space, a manifold is formed that fully characterises the MIMO radar system. In the important case of orthogonal transmit waveforms, the fundamental performance bounds of the MIMO radar system are studied. A space-time receiver architecture is proposed which exploits the virtual SIMO structure as part of a subspace-based joint Doppler, delay and direction of arrival (DOA) estimation framework. Due to the great computational burden of an exhaustive 3-parameter search, the joint Doppler-delay-DOA estimation is partitioned into an equivalent two-stage algorithm. The proposed approach is evaluated via computer simulation studies and shown to outperform existing methods.
Relative contributions of Shakespeare and Fletcher in Henry VIII: An Analysis Based on Most Frequent Words and Most Frequent Rhythmic Patterns

The versified play Henry VIII is nowadays widely recognized to be a collaborative work not written solely by William Shakespeare. We employ combined analysis of vocabulary and versification together with machine learning techniques to determine which other authors took part in the writing of the play and what were their relative contributions. Unlike most previous studies, we go beyond the attribution of particular scenes and use the rolling attribution approach to determine the probabilities of authorship of pieces of texts, without respecting the scene boundaries. Our results highly support the canonical division of the play between William Shakespeare and John Fletcher proposed by James Spedding, but also bring new evidence supporting the modifications proposed later by Thomas Merriam.
Real-Time Bus Arrival Information Systems

This synthesis report will be of interest to transit staff concerned with implementing real-time bus arrival information systems at their agencies. Information on relevant technical capabilities, agency experience, cost, and bus rider reactions to these information systems was documented. The report describes the state of the practice, including both U.S. and international experience. It documents survey information, a review of the relevant literature, as well as interviews with key personnel at agencies that have, or are in the process of, implementing these systems. This report integrates the information obtained from the literature review and survey responses with the follow-up interviews. Case study information details specifics from agencies that have deployed these systems.
A 0.8 dB insertion-loss, 23 dB isolation, 17.4 dBm power-handling, 5 GHz transmit/receive CMOS switch

The highest performance to date of any switch using a CMOS process, with a 0.8 dB insertion-loss, 23 dB isolation and 17.4 dBm power-handling capability at 5 GHz, is accomplished with an optimized single-pole double-throw (SPDT) transmit/receive (T/R) switch using depletion-layer-extended transistors (DETs) in a 0.18 /spl mu/m CMOS process. The effects of junction capacitance decrease and substrate resistance increase in the DET, the adoption of low-loss shielded-pads, and several layout optimizations, lead to the realization of this low insertion-loss. Moreover, the combined effect of the adoption of the source/drain DC biasing scheme and the high substrate resistance in the DET contributes to the high power-handling capability.
Eccentricity Fault Diagnosis and Torque Ripple Analysis of a Four-pole Synchronous Reluctance Machine in Healthy and Faulty Conditions

Abstract—In this research, torque ripple is analyzed, considering both slot opening and distributed winding effects for a 4-pole 60-slot synchronous reluctance machine under healthy and eccentricity fault conditions. Mathematical-based models and numerical methods are used to study the behavior of the machine, especially when it is supplied with a voltage source. For this purpose, the parameters of the machine are computed in both healthy and eccentricity fault conditions using the winding function theory. This article proposes a method that deals with both dynamic and static eccentricity fault diagnosis using a vibration signature; consequently, the results demonstrate that the eccentricity fault has no significant effect on the machine's current signature. Moreover, unbalanced magnetic pull is computed considering eccentricity fault, and then mechanical instability is proven to occur under such circumstances. It should be noted that previous works were generally based on the finite-element method, and current sources were used as suppliers; in this article, a mathematical-based model is utilized and voltage sources are considered as suppliers, which are two main advantages of this article over previous ones. Verification carried out by simulation via the finite-element method supports the effectiveness of the model and control approach.
Pavement Data Analytics for Collected Sensor Data

The Federal Aviation Administration instrumented four concrete slabs of a taxiway at the John F. Kennedy International Airport to collect pavement responses under aircraft and environmental loading. The study started with developing preprocessing scripts to organize, structure, and clean the collected data. As a result of the preprocessing step, the data became easier and more intuitive for pavement engineers and researchers to transform and process. After the data were cleaned and organized, they were used to develop two prediction models. The first prediction model employs a Bayesian calibration framework to estimate the unknown material parameters of the concrete pavement. Additionally, the posterior distributions resulting from the calibration process served as a sensitivity analysis by reporting the significance of each parameter for temperature distribution. The second prediction model utilized a machine-learning (ML) algorithm to predict pavement responses under aircraft and environmental loadings. The results demonstrated that ML can predict the responses with high accuracy at a low computational cost. This project highlighted the potential of using ML for future pavement design guidelines as more instrumentation data from future projects are collected to incorporate various material properties and pavement structures.
Efficiency Estimation Using the Stochastic Production Frontier Approach: Evidence from the National Rugby League

The stochastic frontier production model methodology developed by Battese and Coelli (1992) and applied to American football by Hofler and Payne (1996) is applied to team pointscoring in the (Australasian) National Rugby League (NRL) competition, using performance-influencing and game-specific variables as inputs into the point scoring (production) process. Upon modelling two separate frontier models (home team point scoring, and visiting team point scoring) evidence is found to support previous findings of the existence of a homeground advantage (Richardson, 2000). Points scored by the opposition, successful goalkicking, scrums awarded to the visiting team, the home team's season performance and the home team's roster turnover from game to game were all found to be statistically significantly related to point scoring. The resulting efficiency estimates indicate that, on average, home teams score their points more efficiently than visiting teams, and both score points with high levels of efficiency.
A meta-analysis of neutron lifetime measurements

We calculate the median as well as weighted mean central estimates for the neutron lifetime from a subset of measurements compiled in the 2019 update of the Particle Data Group (PDG). We then reconstruct the error distributions for the residuals using three different central estimates and then check for consistency with a Gaussian distribution. We find that although the error distributions using the weighted mean as well as median estimate are consistent with a Gaussian distribution, the Student’s $t$ and Cauchy distribution provide a better fit. This median statistic estimate of the neutron lifetime from these measurements is given by $881.5 \pm 0.47$ seconds. This can be used as an alternate estimate of the neutron lifetime. We also note that the discrepancy between beam and bottle-based measurements using median statistics of the neutron lifetime persists with a significance between 4 $\sigma$ and 8 $\sigma$, depending on which combination of measurements is used.
Concluding remarks

Precision asteroseismic observations with the Kepler and CoRot satellites enable the internal structure and evolution of pulsating stars to be more exhaustively studied than has hitherto been possible. It is particularly important to study the evolutionary links between white dwarfs and subdwarf-B stars with stars considered to have been their progenitors, those on the Red Giant and Asymptotic Giant Branches. Though observations present challenges for existing stellar evolution and pulsation models, and the data (atomic, molecular and nuclear) on which they are based, excellent prospects for development are identified which will in turn facilitate studies of the Galaxy and extra-solar planets.
Brushless Permanent-Magnet Motor Design

Written for electrical, electronics, and mechanical engineers responsible for designing and specifying motors, the book provides details of brushless DC and synchronous motors, as well as both radial and axial motor topologies. Beginning with a discussion of the fundamentals of generic motor design, it logically progresses to a set of more advanced, yet easily understandable, concepts for designing brushless permanent-magnet motors. In addition, the author fully explains techniques for magnetic modelling and circuit analysis, shows how magnetic circuit analysis applies to motor design, describes all major aspects of motor operation and design in simple mathematical terms, develops rigorous design equations for radial flux and axial flux motors, and illustrates basic motor drive schemes. All common motor design terms are clearly defined and a wealth of charts, tables and equations are included.
A sensor toolkit to facilitate context-awareness for just-in-time questioning

Studying human behavior is a task that researchers in many diverse fields from medicine to ubiquitous computing perform to identify potential health risks or to better understand how computers can assist people. One effective means of acquiring data on human behavior is through just-in-time (JIT) questioning whereby researchers ask a person context-sensitive questions concerning their current activities or well being at appropriate times. Automatic JIT questioning is now possible, and it involves mobile or in-home computing devices that use sensors to determine when to ask real-time contextuallyspecific questions about a person's state. Unfortunately, there is a lack of dedicated, inexpensive, and easy-to-use sensors that are tailored to operate in a JIT questioning framework. This work describes the construction of a toolkit of sensors dedicated to providing the necessary, real-time contextual data that is needed to facilitate JIT questioning. Among the sensors in the toolkit are a heart rate monitor, an electrical current sensor, a UV radiation exposure sensor, a proximity and location sensor, and a multiple switch input sensor. The data returned by the sensors of the JITQ toolkit can be used to create context-sensitive computing devices that can determine appropriate times to ask JIT questions. The sensor toolkit can provide researchers with an affordable and robust option for carrying out behavioral studies using the JIT questioning paradigm. 3 Thesis Supervisor: Stephen Intille, Ph.D. Title: Research Scientist, House_n
Use of Pseudotyped Particles Expressing Influenza A/VietNam/1194/2004 Hemagglutinin in Neutralization Assays

Infections with H5N1 avian influenza viruses have been occurring sporadically over the last ten years and the development of an H5N1 vaccine is considered as the primary strategy to protect humans against a possible H5N1 pandemic. Hemagglutination inhibition (HI) assays are generally used to measure antibody responses, with titers predicting protection in humans. However, since the HI test is relatively insensitive for measuring antibody responses to the recent avian strains, there is an urgent need for new assays that can be easily used to screen human sera. The micro-neutralization assay represents a valid alternative to HI, however this assay requires Biosafety Level 3 laboratories. Here we show the generation of lentiviral vector particles pseudotyped with HA from clade 1 and subclades 2 H5N1 influenza strains as safe surrogates of the whole virus and their use for the evaluation of neutralizing antibodies using a luciferase reporter gene. Results showed that using this assay we were able to detect neutralizing and cross-neutralizing antibodies in animal sera. Furthermore, pseudotype, micro-neutralization and HI titers strongly correlate in mice sera. The pseudotype-based neutralization assay is promptly adaptable to a high-throughput format for the evaluation of vaccine efficacy under Biosafety Level 2 containment.
A quantum source of Minkowski space

We show that D=4 Minkowski space is an emergent concept related to a class of operators in extended Hilbert space with no positive-definite scalar product. We start with the idea of position-like and momentum-like operators (Plewa 2019 J. Phys. A: Math. Theor. 52 375401), introduced discussing a connection between quantum entanglement and geometry predicted by ER=EPR conjecture. We examine eigenequations of the simplest operators and identify D=4 Minkowski space as to be spanned by normalized eigenvectors corresponding to the zero eigenvalue. Both spacetime dimension and signature of the metric are fixed by the regularization procedure. We generalize the result to the case of more general operators, being analogues to quantum fields. We reproduce the Minkowski space again, however, now in a holographic way, as being identified with the conformal boundary of $AdS_5$. We observe an interesting analogy to string theory and, in particular, to AdS/CFT correspondence.
Weighted Network Analysis of Biologically Relevant Chemical Spaces.

In cheminformatics, network representations of the space of compounds have been suggested extensively. Among these, the threshold-network consists of nodes representing molecules. In this network representation, two molecules are connected by a link if the Tanimoto coefficient, a similarity measure, between them exceeds a preset threshold. However, the topology of the threshold-network is affected significantly by the preset threshold. In this study, we collected the data of biologically relevant compounds and bioactivities. We defined the weighted network where the weight of each link between the nodes equals the Tanimoto coefficient between the bioactive compounds (nodes) without using the threshold. We investigated the relationship between the strength of the link connection and the bioactivity closeness in the weighted networks. We found that compounds with significantly high or low bioactivity have a stronger connection than those in the overall network.