Miracle-dz/UniFAR-FTUs huggingface dataset:
Periodic Carrier Frequency Modulation in Reducing Low-Frequency Electromagnetic Interference of Permanent Magnet Synchronous Motor Drive System

This paper introduces the periodic carrier frequency modulation (PCFM) for permanent magnet synchronous motor (PMSM) drive systems so as to reduce the low-frequency electromagnetic interference (EMI). PMSMs are widely used in many applications and they are usually fed by pulsewidth modulation (PWM) inverters. The EMI of PMSM, which results from the switch of power device, generates undesirable effects on the control system. Therefore, it is of importance to reduce the EMI of PMSM. The common mode (CM) conducted EMI model of the PMSM drive system is constructed to investigate the CM voltage. The simulations and experiments of PMSM fed by the fixed frequency PWM (FFPWM) and PCFM are implemented to analyze the CM conducted EMI. The CM EMI spectra of PMSM fed by the FFPWM and PCFM with different spreading frequency widths are compared to explore the influence of PCFM on the CM conducted EMI. The regular patterns on PCFM in reducing the CM conducted EMI of PMSM drive systems are revealed.
FET Noise-Parameter Determination Using a Novel Technique Based on 50-Noise-Figure Measurements

A novel method for measuring the four noise parameters of a field-effect transistor (FET) is presented. It is based on the determination of its intrinsic noise matrix elements [C 11 , C INT 22 , Re(C INT 12 ), Im(C INT 12 )] by fitting the measured device noise figure for a matched source reflection coefficient(F50) at a number of frequency points, thus, a tuner is not required. In contrast to previous works, no restrictive assumptions are made on the intrinsic noise sources. The receiver full-noise calibration is easily performed by using a set of coaxial and on-wafer standards that are commonly available in a microwave laboratory, thus, an expensive broad-band tuner is not required for calibration either. On-wafer experimental verification up to 26 GHz is presented and a comparison with otherF50-based and tunerbased methods is given. As an application, the dependence of the FET intrinsic noise sources as a function of the bias drain–current and gate–length is obtained.
Effect of rapid thermal annealing on InAs/GaAs quantum dot solar cells

The effect of post-growth annealing on InAs/GaAs quantum dot solar cells (QDSCs) has been studied. A significant improvement in photoemission, photocurrent density, and spectral response has been observed with post-growth annealing. The optimal anneal temperature was found to be 700°C, which lead to an 18% improvement in current density from 4.9 mA cm-2 for as-grown sample to 5.8 mA cm-2. We assign this enhanced performance to the reduced density of inherent point defects that was formed at the quantum dot (QD) and GaAs barrier. Post-growth thermal anneal treatment of QDSCs is demonstrated as a simple route for achieving improved device performance.
White Dwarfs in the Era of the LSST and Its Synergies with Space-based Missions

With the imminent start of the Legacy Survey for Space and Time (LSST) at the Vera C. Rubin Observatory and several new space telescopes expected to begin operations later in this decade, both time-domain and wide-field astronomy are on the threshold of a new era. In this paper, we use a new multicomponent model for the distribution of white dwarfs (WDs) in our Galaxy to simulate the WD populations in four upcoming wide-field surveys (i.e., LSST, Euclid, the Roman Space Telescope, and the Cosmological Advanced Survey Telescope for Optical and uv Research) and use the resulting samples to explore some representative WD science cases. Our results confirm that LSST will provide a wealth of information for Galactic WDs, detecting more than 150 million WDs at the final depth of its stacked 10 yr survey. Within this sample, nearly 300,000 objects will have 5σ parallax measurements, and nearly 7 million will have 5σ proper-motion measurements, allowing the detection of the turnoff in the halo WD luminosity function and the discovery of more than 200,000 ZZ Ceti stars. The wide wavelength coverage that will be possible by combining LSST data with observations from Euclid and/or the Roman Space Telescope will also discover WDs with debris disks, highlighting the advantages of combining data between the ground- and space-based missions.
Partially Persistent Data Structures of Bounded Degree with Constant Update Time

The problem of making bounded in-degree and out-degree data structures partially persistent is considered. The node copying method of Driscoll et al. is extended so that updates can be performed in worst-case constant time on the pointer machine model. Previously it was only known to be possible in amortised constant time.The result is presented in terms of a new strategy for Dietz and Raman's dynamic two player pebble game on graphs.It is shown how to implement the strategy and the upper bound on the required number of pebbles is improved from 2b+2d+O(√b) to d+2b. where b is the bound of the in-degree and d the bound of the out-degree. We also give a lower bound that shows that the number of pebbles depends on the out-degree d.
Improving the prediction power of the speech transmission index to account for non-linear distortions introduced by noise-reduction algorithms

Although the speech transmission index (STI) has been shown to predict successfully the effects of linear distortions introduced by filtering and additive noise, it does not account for non-linear distortions present in noise-suppressed speech. In this study, the normalized covariance metric (NCM), a STI-based intelligibility measure, was modified to reduce the effects of non-linear distortions introduced by most noise-suppression algorithms for intelligibility prediction. This was done by designing a new definition of the output signal-to-noise ratio to compensate the biased estimation of the input SNR prior to the noise-suppression processing. The modified NCM measure was evaluated with intelligibility scores obtained by normal-hearing listeners in 72 noisy conditions involving noise-suppressed speech corrupted by four different maskers (babble, car, train and street interferences). Significantly higher correlation with intelligibility score was obtained from the modified NCM measure, in contrast to those from the original NCM measure.
An RpoS-dependent sRNA regulates the expression of a chaperone involved in protein folding

It is shown that SraL sRNA (RyjA), a sRNA present in many bacteria, down-regulates the expression of the chaperone Trigger Factor (TF), encoded by the tig gene and one of the three major ribosome-associated chaperones. SraL interacts directly with the 5′ UTR of the tig mRNA a few nucleotides upstream of the Shine-Dalgarno region. This constitutes the first report of a small RNA affecting protein folding.
On the Ergodic Capacity Region of the Separately Correlated Rician Fading Multiple Access MIMO Channel

The ergodic capacity region of a multiple access separately-correlated Rician fading MIMO channel is investigated by using an asymptotic approach. It is assumed that the number of transmit and receive antennas grow asymptotically approaching finite values while the number of users and the SNR are kept finite. It is shown by numerical results that this asymptotic approach is very accurate even when the number of antennas is as low as a few units. The ergodic capacity achieving covariance matrices for all users are derived according to the algorithm provided and the corresponding capacity is compared with the mutual information achieved by iid power allocation. Monte-Carlo simulations are also reported in order to verify the accuracy of the asymptotic results.
A Weak Signals De-Noising Method Based On Virtual Instrument Technology

A de-noising method for obtaining the periodical weak signals in strong noised backgrounds was investigated in this paper. The virtual instrument (VI) technology based on the mixed programming between LABVIEW and MATLAB was employed to realize the method. First, the signal-to-noise ratio (SNR) was improved by accumulation and equilibration (A&E) process; second, the noise was minimized again by wavelet de-noising. The simulation results indicate that the SNR was improved from -13.55dB to 7.94dB. This de-noising method was implemented totally by software without any hardware accumulation system.
Effects of Misdiagnosis in Input Data on the Identification of Differential Expression Genes in Incipient Alzheimer Patients

Gene expression profiles of 16 Alzheimer's (AD) patients, diagnosed as incipient or healthy using Mini-Mental State Examination and Neurofibrillary Tangles scores, were analyzed to validate the reclassification of 4 subjects previously identified as being misdiagnosed. Three datasets were created using original classifications (D1), new classifications, based on a misclassification algorithm (D2), and by removing questionable subjects (D3). Mixed model analysis was used to identify differentially expressed genes. Many genes related to the nervous system and AD were found to be differentially expressed in D2 and D3, while few genes, none related to NS or AD, were found using D1. Several additional relevant genes were found when using D2 versus D3, which were likely due to differences in sample size. These results suggest the 4 questionable subjects were likely misclassified in D1. The similarities between results obtained using D2 and D3 provides further evidence of the adequacy of the misclassification algorithm.
Metal-insulator transition characteristics of VO2 thin films grown on Ge(100) single crystals

Phase transitions exhibited by correlated oxides could be of potential relevance to the emerging field of oxide electronics. We report on the synthesis of high-quality VO2 thin films grown on single crystal Ge(100) substrates by physical vapor deposition and their metal-insulator transition (MIT) properties. Thermally triggered MIT is demonstrated with nearly three orders of magnitude resistance change across the MIT with transition temperatures of 67 °C (heating) and 61 °C (cooling). Voltage-triggered hysteretic MIT is observed at room temperature at threshold voltage of ∼2.1 V for ∼100 nm thickness VO2 films. Activation energies for electron transport in the insulating and conducting states are obtained from variable temperature resistance measurements. We further compare the properties of VO2 thin films grown under identical conditions on Si(100) single crystals. The VO2 thin films grown on Ge substrate show higher degree of crystallinity, slightly reduced compressive strain, larger resistance change a.
Less is more: The availability heuristic in early childhood.

This study examined whether young children are influenced by the subjective experience associated with an easy or difficult recall when making memory decisions. Seventy-one children, aged 4, 6, and 8 years, were asked to generate either a small (easy condition) or large (hard condition) number of first names. Statistical analyses revealed that participants in the hard condition were more likely to infer that they did not know many names than participants in the easy condition, contrary to what would be expected if children based their memory judgement on the objective number of recalled items. Overall, our results support the hypothesis that children as young as 4 years old rely on the subjective experience of ease to regulate their decision-making processes. Theoretical implications of these findings are discussed.
The extracellular-matrix protein matrilin 2 participates in peripheral nerve regeneration

Matrilins are adaptor proteins of the extracellular matrix involved in the formation of both collagen-dependent and collagen-independent filamentous networks. Although their molecular structure and binding partners have been characterized, the functional roles of the four matrilin family members in vivo are still largely unknown. Here, we show that matrilin 2, expressed in pre-myelinating Schwann cells during normal development, profoundly influences the behaviour of glial cells and neurons in vitro. When offered as a uniform substrate, matrilin 2 increased neurite outgrowth of dorsal root ganglia (DRG) neurons and enhanced the migration of both cell line- and embryonic DRG-derived Schwann cells. Vice versa, axonal outgrowth and cell migration were decreased in DRG cultures prepared from matrilin-2-deficient mice compared with wild-type (wt) cultures. In stripe assays, matrilin 2 alone was sufficient to guide axonal growth and, interestingly, axons favoured the combination of matrilin 2 and laminin over laminin alone. In vivo, matrilin 2 was strongly upregulated in injured peripheral nerves of adult wild-type mice and failure of protein upregulation in knockout mice resulted in delayed regrowth of regenerating axons and delayed time-course of functional recovery. Strikingly, the functional recovery 2 months after nerve injury was inferior in matrilin-2-deficient mice compared with wild-type littermates, although motoneuron survival, quality of axonal regeneration, estimated by analyses of axonal diameters and degrees of myelination, and Schwann cell proliferation were not influenced by the mutation. These results show that matrilin 2 is a permissive substrate for axonal growth and cell migration, and that it is required for successful nerve regeneration.
Low-dose CT in SPECT/CT patient scan

Advanced single-photon emission computed tomography (SPECT) includes a cone-beam computed tomography (CBCT) unit for acquisition of anatomic information about the imaged subject. CT images obtained can be used for attenuation correction in SPECT and localization determination. Hardware considerations have led to the use of an imaging configuration in which the CBCT field of view (FOV) is extended through the use of an offset detector. In general, current clinical CBCT applications involve data acquired at a large number of views. Therefore, the accumulated radiation dose integrated over a large number of views can be of a health concern. In this work, we report our preliminary investigation of image reconstruction by using the recently developed adaptive steepest descent-projection onto convex sets (ASD-POCS) algorithm from real patient data collected at a number of views much fewer than what are used currently in CBCT imaging in clinical SPECT/CT studies.
Restoring a Legacy: Lessons Learned

Rebuilding a legacy system has some parallels to the restoration of a work of art. The authors draw upon this comparison to illustrate the challenges they faced in redesigning a telephony system. The restoration involved far more than updating the code, the development team also had to understand the existing architecture, add new functionality, and develop a long-term hardware migration plan. The technical and managerial lessons learned should prove valuable to those involved in similar projects.
Study of the touchpad interface to manipulate AR objects

A system for manipulating for AR objects on the touchpad, we propose the relative input method with grasping the touchpad with still looking at the real space in which AR object exist. Specifically, a pointer is displayed in the AR space and it is possible to manipulate an AR object by operating the pointer by treating the input amount as the relative amount of the touchpad grasped in hand. In the same way, we believe that there is a scene which they should treat the input amount as the absolute amount of the touchpad is suitable for AR environment. In the case of treating the input amount as the absolute amount, it is hard to operate with looking at the real space in which AR objects exist. Then, by overlaying the miniature of the AR objects, it is possible to operate. Due to this, the user can manipulate an AR object out of reach precisely. In this paper, we study the operability in the case performing an operation with looking at the real space in which AR objects exist and operation with looking at the touchpad. As a result, in the character input as selection task, the absolute input method with looking at the touchpad is sooner than the relative input method with looking at the real space in which AR objects exist. In the alignment task, there is no difference in completion time either input method.
DESIGN OF NONLINEAR OPTIMAL CONTROL SYSTEMS USING JORDAN CONTROLLED FORM ANATOLY GAIDUK

The problem of control systems design for nonlinear plants still has no exhaustive solution. This problem is commonly solved on the basis of transformation of the nonlinear plant equations to some simple. Such approach simplifies the solution of the control system design problem and makes the solution analytical. For design of the optimal control systems for the nonlinear plants, their equations are expedient to transform to Jordan controlled form (JCF). The analytical design method of the optimal control systems for nonlinear plants with using the JCF of their equations is proposed in this paper. This problem has a solution if all plant state variables are measured. The JCF exists, if the nonlinear plant is completely controllable. The proposed method includes two steps. At the first step, a linearization control is designed by a nonlinear reversible transformation of the plant state variables. Under the linearization control, the system equations are linear and stationary in the new variables. Theorem about existence of a linearization control is proved. At the second step, the optimal control is designed as optimal in the sense of a minimum of nonlinear quadratic criteria. This control is designed using solution of the Riccati equation. Optimality of the obtained nonlinear control is proved also. Design of the optimal control systems for nonlinear plants using JCF is expedient, because the equations of many real plants have JCF or can be easily transformed to this form. Frequently, the plant equations convert into this form if the state variables are designated in appropriate way. The example of the optimal control system design for nonlinear plant is given. Key-Words: Nonlinear plant, reversible transformation, Jordan controlled form, linearization control, optimal control, nonlinear quadratic criteria.
The Effect of Nationality on the Multidimensionality of Tourist Destination Image: A Case of Hangzhou

Extant literatures studied the influences of national culture on the perceptions of tourist destination image (TDI), while few researches focused on the different TDI multidimensionality induced by national culture. This study examines the influence of national culture on the multidimensionality of TDI via taking tourist nationality as the proxy variable of national culture for two samples composed of Japan and Korea tourist respectively. The result shows that there are evident structural differences of TDI multidimensionality for the two samples. Specifically, the numbers, the eigen values and the item composition of TDI factors, and the influences of TDI factors on tourist satisfaction or behavioral intentions all are quite different. Finally, managerial implications are discussed.
De la genèse d’une nouvelle classe d’antibactériens à base de polyphénols cycliques de type calixarène : études moléculaire(s), cellulaires(s) et structurale(s) en vue de l'identification des cibles d'action : le cas du para-guanidinoéthylcalix[4]arène

Trois inquietudes, actuellement, dans le monde de la microbiologie medicale : la frequence des infections nosocomiales, d'origine bacterienne dans plus de 60% des cas, la multiplication et la dissemination des resistances bacteriennes, mais aussi la penurie annoncee en molecules antibiotiques et antiseptiques. Il est indispensable de trouver de nouvelles molecules antibacteriennes, avec un mecanisme d'action innovant. Nous presentons dans cette etude, l'evaluation d'une molecule innovante, calixarene purement synthetique, le para-guanidinoethylcalix[4]arene (Cx1). Dans une 1ere partie de ce travail, nous avons montre que cette molecule se caracterise par : (i) une activite antibacterienne a large spectre, conservee sur des isolats cliniques tels que les SARM, les ERG ou les EBLSE ; (ii) une activite rapidement bactericide, concentration-dependante ; et (iii) une absence de cytotoxicite in vitro. Des interactions de type synergie sont obtenues avec de nombreux antibiotiques (s-lactamines, fluoroquinolones, rifampicine, acide fusidique, tigecycline…) ; aucun antagonisme n'a ete observe. Dans une 2eme partie, nous avons souligne l'absence de selection de mutants resistants in vitro, apres 30 passages, pour S. aureus et P. aeruginosa. Pour E. coli, des mutants resistants stables sont selectionnes au dela de 15 ou 20 passages, avec un effet inoculum. Enfin, dans une 3eme partie, nous avons recherche la ou les cible(s) du Cx1 par diverses techniques, innovantes (microelectrophorese, microscopie a force atomique) ou plus classiques (cytometrie en flux, liaison au LPS/LTA). L'ensemble des donnees recueillies converge vers l'existence d'une cible ou plusieurs cibles parietales (liaison au LPS et au LTA, a d'autres structures ? ). L'activite du Cx1 resulte en une modification des proprietes parietales (densite de charge de surface, souplesse hydrodynamique, permeabilite membranaire) et en une augmentation de la rigidite bacterienne (pression osmotique). En conclusion, le Cx1 possede un potentiel interessant en terme de nouvel antibacterien, mais de nombreuses inconnues demeurent encore concernant son mecanisme d'action. Cela laisse ouverte la porte a de nombreuses voies de recherche afin de mieux apprehender les cibles de cette molecule, et d'en optimiser les proprietes.
Text-dependent speaker verification using vector quantization source coding

Several vector quantization approaches to the problem of text-dependent speaker verification are described. In each of these approaches, a source codebook is designed to represent a particular speaker saying a particular utterance. Later, this same utterance is spoken by a speaker to be verified and is encoded in the source codebook representing the speaker whose identity was claimed. The speaker is accepted if the verification utterance's quantization distortion is less than a prespecified speaker-specific threshold. The best approach achieved a 0.7 percent false acceptance rate and a 0.6 percent false rejection rate on a speaker population comprising 16 admissible speakers and 111 casual imposters. The approaches are described, and detailed experimental results are presented and discussed.
Factors associated with acute medication overuse in chronic migraine patients.

OBJECTIVE To evaluate the prevalence of psychiatric disorders in patients diagnosed with chronic migraine with and without acute medication overuse. METHODS Seventy-two volunteers were recruited from a Family Health Program of the Paraisópolis community in São Paulo (SP), Brazil. These patients were submitted to a detailed headache questionnaire. All participants were submitted to physical and neurological examinations. The following variables were analyzed: age, gender, education level, body mass index, type of overused medication, headache characteristics, and caffeine consumption, lifetime anxiety and mood disorders. RESULTS Out of 72 patients, 50 (69%) had chronic migraine with medication overuse, and 22 (31%) had chronic migraine without medication overuse. Factors such as age, gender, education level, body mass index, type of overused medication, headache characteristics, and caffeine consumption were not significantly different between the two studied groups. Lifetime anxiety and mood disorders were more common in patients with acute medication overuse (p=0.003 and p=0.045, respectively). CONCLUSION This study has shown a significant association among chronic migraine and medication overuse with lifetime mood and anxiety disorders in patients of the studied population. No association was found for other researched psychiatric disorders.