Miracle-dz/UniFAR-FTUs huggingface dataset:
A new method for the detection and location of faults in matrix converters

This paper presents a new method to diagnose open-circuit faults in matrix converters. The proposed method consists in the measurement and estimation, simultaneously, of the three output phase voltages of the matrix converter. Afterwards, three error voltage signals are generated, which will be subsequently modulated using the control signals of each bidirectional switch of the converter. The nine modulated error voltages thus obtained are then monitored continuously and averaged over a certain period of time. When the converter is in healthy conditions, the values obtained for these signals are small. If an open-circuit fault arises in one or more switches, the modulated signals assigned to the faulty switches increase beyond a certain threshold value, hence giving the indication of the faulty condition.
Flexible Bragg reflectors for the terahertz regime composed of polymeric compounds

Terahertz technology holds a huge potential for a variety of applications in science and the industry, but still suffers from the lack of widely available system components. Not only active but also passive components like reflectors and filters are needed to advance the maturity of terahertz technology in general. Here, we present high quality, flexible, low-cost terahertz Bragg reflectors and filters based on polymeric compounds. The compounding technology allows to custom tailor dielectric properties as desired for the mirror design, namely a high index of refraction and low absorption at the center frequency of the reflector or filter. Two different base materials are evaluated: poly(propylene) (PP) and poly(vinylidene fluoride co- hexafluoropropylene) (PVDF). In both cases, rutile titania (TiO2) serves as high refractive index additive. The frequency dependent reflection coefficient of a nine layer PVDF and a five layer PP- based mirror are measured for a set of angles, both in s- and p-polarization, using a fiber coupled terahertz time domain spectrometer. Transfer matrix simulations are in good agreement with the experimental data.
Effects of spatial cues on locating emotional targets

Inhibition of return (IOR) refers to slower responding to a visual target appearing at a previously cued versus uncued location. In three experiments, we asked whether IOR would be affected by the emotional content of target stimuli. Participants reported the location of negative (spiders, angry faces) or neutral (objects, neutral faces) targets as quickly and accurately as possible after a valid or invalid location cue (a simple circle). IOR was significantly smaller when detecting negative versus neutral targets, but only after repeated exposures to these stimuli (i.e., with blocked presentations). This effect was eliminated when target type was randomized within blocks. By presenting negative versus neutral targets in short alternating blocks and examining IOR on the first trial of each new block, we show that the emotional modulation of IOR stems from the affective context in place before visual orienting is initiated, not by perceptual processing of the target after cue offset.
Isoflavones Reduce Arterial Stiffness: A Placebo-Controlled Study in Men and Postmenopausal Women

Objective—This study was undertaken to address the vascular effects of isolated isoflavones as potential contributors to their cardioprotective properties, focusing on biochanin and formononetin. Methods and Results—In a randomized, double-blind trial, 80 healthy subjects, 46 men and 34 women, 45 to 75 years of age, received isoflavones enriched in either biochanin or formononetin (precursors of genistein and daidzein; 80 mg/d) crossed over randomly with placebo in two 6-week periods. The end points were measured at baseline and after each intervention and included large artery stiffness (systemic arterial compliance and pulse wave velocity), endothelial function in conduit arteries (flow-mediated vasodilation), 24-hour ambulatory blood pressure, and total peripheral resistance. Isoflavone intervention significantly reduced arterial stiffness with improved systemic arterial compliance (P =0.04; repeated-measures ANOVA, Bonferroni correction) attributable to a reduction in total peripheral resistance (P =0.03) and a corresponding reduction in central pulse wave velocity (P =0.02) compared with placebo. Isoflavones did not affect blood pressure (P =0.5) or flow-mediated vasodilation (P =0.44). Improvements seemed limited to formononetin-enriched isoflavones (adjusted P =0.06). Formononetin treatment also reduced circulating vascular adhesion cell molecule-1 (P <0.01). Conclusions—In normotensive men and postmenopausal women, red clover isoflavones enriched in formononetin reduced arterial stiffness and total vascular resistance but had no effect on blood pressure. These effects may partly explain the lower cardiovascular risk in populations eating isoflavone-rich diets.
Gene Printer: Laser-Scanning Targeted Transfection of Cultured Cardiac Neonatal Rat Cells

Heterogeneous gene expression in cardiac cells and tissues which requires targeted delivery of foreign DNA into selected cells or regions is needed for the development of novel therapies. Several techniques have been employed for targeted transfection, such as direct microinjection into cells or targeted electroporation. However, these techniques have limited bandwidth or spatial resolution of transfection. We aimed to develop a method for transfection of cardiac cells by means of laser-assisted optoporation using a standard confocal microscope. This technique allows for the transfection of selected cell types in the presence of other cell types as long as they are distinguishable with a microscope. This technique can work as a “gene printer” creating arbitrarily shaped areas of transfected cells.
Insect olfaction and the evolution of receptor tuning

Insects detect odorants primarily using odorant receptors (OR) housed in the dendritic membrane of olfactory sensory neurons (OSN). Pioneering studies indicated that insects, like mammals, detect odorants in a combinatorial fashion with a specific odor ligand activating several broadly tuned ORs, and each OR being activated by several ligands. Several recent studies, however, challenge this view by providing examples where ecologically relevant odorants are detected by high-specificity ORs activating dedicated neuronal circuits. Here we review these contrasting findings on the ligand selectivity of insect ORs and their neuronal wiring, and outline scenarios describing how adaptive and neutral evolution might shape both narrow and broad receptor tuning. The fact that not all ORs display narrow tuning might partly be due to key ligands having been missed from screens or too high stimuli concentrations being used. However, the birth-and-death model of OR evolution, involving both adaptive and neutral events, could also explain the evolution of broad tuning in certain receptors due to positive selection or relaxed constraint. If the insect olfactory system indeed contains both narrowly and broadly tuned ORs, this suggests that it is a hybrid between dedicated channels and combinatorial coding. The relative extent of the two coding modes is then likely to differ between species, depending on requirements of perceived chemical space and the size of the OR repertoire. We address this by outlining scenarios where certain insect groups may be more likely to have evolved combinatorial coding as their dominant coding strategy. Combinatorial coding may have evolved predominantly in insects that benefit from the ability to discriminate between a larger number of odorants and odor objects, such as polyphagous or social species. Alternatively, combinatorial coding may have evolved simply as a mechanism to increase perceived odor space in species with small OR repertoires.
A geometric approach to anguilliform locomotion: modelling of an underwater eel robot

In this paper, we approach the modeling, simulation, and control of snake and eel-like robots from a geometric perspective. We propose basic viscous and fluid drag models to capture the effect of external forces acting on the bodies of land-based snakes and aquatic eels, respectively. Using these models, we show that the dynamics can be decomposed into motions in the position and orientation of the overall system and changes in its internal shape. This allows us to write reduced dynamics for the serpentine and swimming motions that isolate the effect of shape changes on the momentum of the system. We explore in simulation several types of locomotive gaits, and report qualitative experimental results that provide validation for these simulations.
Structural and gait optimization of a hexapod robot with Particle Swarm Optimization

The aim of this paper is to introduce a novel method for determining the structure and dimensions of a walking robot using an optimization method. With this solution the parameters of the robot's gait algorithm can also be fine-tuned. Prior to the construction of the authors' latest robot called Szabad(ka) II, a sophisticated modeling was carried out. With the help of this model, the functionality of the robot could be checked before the manufacturing process. Until recently modeling has been used mostly for the verification of the construction, but as the next step it will be used for defining the structure and dimensions. The definition of the optimal parameters can be solved with optimization methods. The Particle Swarm Optimization (PSO) meets the expectations.
Analyzing Stack Flows to Compare Java Programs

This paper presents a method for comparing and detecting clones of Java programs by analyzing program stack flows. A stack flow denotes an operational behavior of a program by describing individual instructions and stack movements for performing specific operations. We analyze stack flows by simulating the operand stack movements during execution of a Java program. Two programs for detection of clones of Java programs are compared by matching similar pairs of stack flows in the programs. Experiments were performed on the proposed method and compared with the earlier approaches of comparing Java programs, the Tamada, k-gram, and stack pattern based methods. Their performance was evaluated with real-world Java programs in several categories collected from the Internet. The experimental results show that the proposed method is more effective than earlier methods of comparing and detecting clones of Java programs.
Cutting hyperplane arrangements

We consider a collectionH ofn hyperplanes in Ed (where the dimensiond is fixed). An ε-cutting forH is a collection of (possibly unbounded)d-dimensional simplices with disjoint interors, which cover all Ed and such that the interior of any simplex is intersected by at mostεn hyperplanes ofH. We give a deterministic algorithm for finding a (1/r)-cutting withO(rd) simplices (which is asymptotically optimal). Forr≤n1−σ, where δ>0 is arbitrary but fixed, the running time of this algorithm isO(n(logn)O(1)rd−1). In the plane we achieve a time boundO(nr) forr≤n1−δ, which is optimal if we also want to compute the collection of lines intersecting each simplex of the cutting. This improves a result of Agarwal, and gives a conceptually simpler algorithm.For ann point setX⊆Ed and a parameterr, we can deterministically compute a (1/r)-net of sizeO(rlogr) for the range space (X, {X ϒ R; R is a simplex}),In timeO(n(logn)O(1)rd−1+rO(1)). The size of the (1/r)-net matches the best known existence result. By a simple transformation, this allows us to find ε-nets for other range spaces usually encountered in computational geometry.These results have numerous applications for derandomizing algorithms in computational geometry without affecting their running time significantly.
Corporate constructs: to what extent are personal constructs personal?

Abstract We propose the existence of corporate constructs (specialized techniques and forms of thought). Corporate constructs are not social constructs, and the idea of a corporate construct does not contradict Kelly's requirement that an individual is a site of decision making. We explore the differences between conceptions of personal and social constructs, highlighting some of their limitations. Corporate constructs are suggested as a way of dealing with these limitations.
Enhance & explore: an adaptive algorithm to maximize the utility of wireless networks

The goal of jointly providing efficiency and fairness in wireless networks can be seen as the problem of maximizing a given utility function. In contrast with wired networks, the capacity of wireless networks is typically time-varying and not known explicitly. Hence, as the capacity region is impossible to know or measure exactly, existing scheduling schemes either under-estimate it and are too conservative, or they over-estimate it and suffer from congestion collapse. We propose a new adaptive algorithm, called Enhance & Explore (E&E). It maximizes the utility of the network without requiring any explicit characterization of the capacity region. E&E works above the MAC layer and it does not demand any modification to the existing networking stack. We first evaluate our algorithm theoretically and we prove that it converges to a state of optimal utility. We then evaluate the performance of the algorithm in a WLAN setting, using both simulations and real measurements on a testbed composed of IEEE 802.11 wireless routers. Finally, we investigate a wireless mesh network setting and we find that, when coupled with an efficientmechanismfor congestioncontrol, the E&E algorithm greatly increases the utility achieved by multi-hop networks as well.
Assessment in Partnership with Learners

ABSTRACT Assessment procedures have a profound impact on the attitudes students take towards their work, their learning strategies and their commitment to learning. Most assessment of student learning is, however, undertaken with little or no consultation with students. Given the importance to students of developing the capacity for self‐assessment and evaluation, the unilateral control of assessment assumed by many academic staff can only be viewed as pedagogically unsound. It is important that students develop a clear understanding of tutor expectations regarding any learning task and this requires engagement in dialogue in the classroom setting. To become effective, independent, autonomous learners, students must be enabled to understand assessment criteria and expected levels of attainment. They should be empowered through meaningful feedback on their learning which relates to assessment criteria and which is given from a perspective of improvement on current attainment. This paper presents the case f.
Preferences for religious help-seeking: racial and gender differences, interfaith intolerance, and defensive theology

We examined the relation between preference for religious help-seeking and defensive theology, interfaith intolerance, spiritual conceptualisations of mental health problems, race/ethnicity, and gender in a predominantly Christian sample of 389 college students. MANOVA revealed significant main effects for race/ethnicity, with African American participants showing higher scores than Caucasians and Latinos/as across all main study variables. Follow-up ANOVA yielded main effects for race across all four variables and main effects for gender on spiritual conceptualisation of mental health problems and defensive theology. All race/ethnicity by gender interactions were nonsignificant. Preference for religious help-seeking was regressed in a hierarchical manner on race/ethnicity and gender, followed by interfaith intolerance, defensive theology, and spiritual conceptualisation of mental health problems. A statistically significant model explaining 46% of the variance emerged incorporating all variables except race. A framework for understanding help-seeking preference is presented, followed by directions for future research.
The terminal bulk Lorentz factor of relativistic electron-positron jets

We present numerical simulation of bulk Lorentz factor of relativistic electron-positron jet driven by Compton rocket effect from accretion disc radiation. The plasma is assumed to have a power-law distribution ne()/ s whith 1 < < max and is continuously reheated to compensate for radiation losses. We include full Klein-Nishina (hereafter KN) cross section, and study the role of energy upper cut-off max, spectral index s, and source compactness. We determine terminal bulk Lorentz factor in the case of supermassive black holes relevant to AGN and stellar black holes relevant to galactic microquasars. In the latter case, Klein-Nishina cross section effect are more important, and induce terminal bulk Lorentz factor smaller than in the former case. Our result are in good agreement with bulk Lorentz factors observed in galactic sources (GRS1915+105, GROJ1655-40) and extragalactic ones. Differences in scattered radiation and acceleration mechanism efficiency in AGN environment can be responsible for the variety of relativistic motion in those objects. We also take into account the influence of the size of the accretion disc; if the external radius is small enough, the bulk Lorentz factor can be as high as 60.
In vivo retention of 18F-AV-1451 in corticobasal syndrome

Objective: To study the usefulness of 18F-AV-1451 PET in patients with corticobasal syndrome (CBS). Methods: We recruited 8 patients with CBS, 17 controls, 31 patients with Alzheimer disease (AD), and 11 patients with progressive supranuclear palsy (PSP) from the Swedish BioFINDER study. All patients underwent clinical assessment, 18F-AV-1451 PET, MRI, and quantification of β-amyloid pathology. A subset of participants also underwent 18F-FDG-PET. Results: In the 8 patients with CBS, 6 had imaging findings compatible with the corticobasal degeneration pathology and 2 with typical AD pathology. In the 6 patients with CBS without typical AD pathology, there were substantial retentions of 18F-AV-1451 in the motor cortex, corticospinal tract, and basal ganglia contralateral to the most affected body side. These patients could be clearly distinguished from patients with AD dementia or PSP using 18F-AV-1451. However, cortical atrophy was more widespread than the cortical retention of 18F-AV1451 in these CBS cases, and cortical AV-1451 uptake did not correlate with cortical thickness or glucose hypometabolism. These results are in sharp contrast to AD dementia, where 18F-AV-1451 retention was more widespread than cortical atrophy, and correlated well with cortical thickness and hypometabolism. Conclusions: Patients with CBS without typical AD pathology exhibited AV-1451 retention in the motor cortex, corticospinal tract, and basal ganglia contralateral to the affected body side, clearly different from controls and patients with AD dementia or PSP. However, cortical atrophy measured with MRI and decreased 18F-fluorodeoxyglucose uptake were more widespread than 18F-AV-1451 uptake and probably represent earlier, yet less specific, markers of CBS. Classification of evidence: This study provides Class III evidence that 18F-AV-1451 PET distinguishes between CBS and AD or PSP.
Impression management tactics and affective context: influence on sales performance appraisal

Purpose – Despite the recognition that the subordinate's influence is a particularly noteworthy feature of the social context with considerable potential to affect the performance evaluation process, there are almost no studies that consider this influence in a selling context. Attempting to contribute to address these needs, the model presented here depicts a number of social and situational factors influencing supervisor's rating of salesperson's performance, primarily operating through affective processes.Design/methodology/approach – Data were collected from 122 salespeople and their immediate managers from 35 firms pertaining to nine different industries.Findings – SEM results indicated that supervisor‐focused impression management was positively related to the supervisor's liking of the salesperson. Consistent as well with prior research is the positive influence of supervisor's affect towards salesperson on the supervisor's ratings of sales performance, both directly and indirectly, through the eff.
An Empirical Review of Internet Addiction Outcome Studies in China

Objectives: The authors systematically reviewed the outcomes and methodological quality of 24 Internet addiction (IA) treatment outcome studies in China. Method: The authors used 15 attributes from the quality of evidence scores to evaluate 24 outcome studies. These studies came from both English and Chinese academic databases from 2000 to 2010. Results: Among the 15 attributes, only sequence generation and intention-to-treat were reported by more than 50% of the 24 studies. None of the studies contained treatment adherence ratings or collateral reports. Cognitive behavior therapy combined with family therapy or group therapy emerged as possibly efficacious treatments. Conclusions: More rigorously designed studies, accompanied by transparent reporting of methods and findings are needed to identify promising IA treatments.
A Case for an Expanded Framework of Ethics in Practice

Using a case vignette as an illustration, an expanded framework for examining ethical issues in human service practice is proposed. The article argues that the helping relationship is multiply constructed through discursive fields, rather than being a given, and that the lens of ethics must be widened to understand both the highly contradictory nature of practice, with its accompanying paradoxes, and the broader structures that constrain and influence practitioners. The article draws on the centrality of the concept of ethical trespass to recognize the inevitability of some level of harm in the application of human service work, despite intention or skill. At the same time, investigating workers' uses of resistance to the dominant discourses is suggested as a means to edge toward the reduction of trespass.
Constrained software generation for hardware-software systems

Mixed systems are composed of interacting hardware components such as general-purpose processors, application-specific circuits and software components that executes on the general purpose hardware. The software component consists of application-specific routines that must deliver the required system functionality and a runtime environment. Further, the software is required to deliver functionality under constraints of timing and memory storage available. We consider methods to achieve software generation under imposed constraints and demonstrate the utility of our approach by examples. <<ETX>>
Supplementary Figure S2

Fig. S2. Deletion of pknK increases resistance of M. tuberculosis to in vitro stress conditions. Viability of the wild-type (black bars), LIX11 mutant (white bars) and LIX16 complemented mutant (hatched bars) strains was determined during growth under (a) acidic pH, (b) oxidative (5 mM hydrogen peroxide) and (c) hypoxia stress. Results are presented as the mean±SD of three independent experiments. The significance of differences in the c.f. u. of the mutant compared to wild-type or LIX16 strain is indicated by * (P<0.05), ** (P<0.01) and *** (P<0.001), respectively.
The Analysis of Magnetic and Thermal Characteristics for the Three Gorges' 840MVA Evaporative Cooling Hydrogenerator on the Basis of Ansys Software

The calculation of large hydrogenerator's magnetic and thermal fields is very complicated due to the complexity of their construction, different properties of their materials and nonlinearity of core B-H curve. Finite Element analysis tools are relatively convenient for solving these problems. In this paper, Ansys software is adopted in analysis of the Three Gorges' 840MVA evaporative cooling hydrogenerator. Magnetic analysis and thermal analysis are made respectively. By doing that we got satisfying results and the results also show the advantage of the evaporative cooling technology.