Miracle-dz/UniFAR-FTUs huggingface dataset:
A Dual Resonance Electromagnetic Vibration Energy Harvester for Wide Harvested Frequency Range with Enhanced Output Power

A dual resonance vibration electromagnetic energy harvester (EMEH) is proposed in this paper to extend frequency range. Compared with the conventional dual resonance harvester, the proposed system realizes an enhanced “band-pass” harvesting characteristic by increasing the relative displacement between magnet and coil among two resonance frequencies with a significant improvement in the average harvested power. Furthermore, two resonant frequencies are decoupled in the proposed system, which leads to a more straightforward design. The proposed dual resonance EMEH is constructed with a tubular dual spring-mass structure. It is designed with a serpentine planar spring and the coil position is optimized for higher power density with an overall size of 53.9 cm3 for the dual resonance EMEH. It realizes an output power of 11 mW at the first resonant frequency of 58 Hz, 14.9 mW at the second resonant frequency of 74.5 Hz, and 0.52 mW at 65 Hz, which is in the middle of the two resonance frequencies. The frequency range of output power above 0.5 mW is from 55.8 Hz to 79.1 Hz. The maximum normalized power density (NPD) reaches up to 2.77 mW/(cm3·g2). Compared with a single resonance harvester design under the same topology and outer dimension at a resonant frequency of 74.5 Hz, the frequency range in the proposed EMEH achieves more than a 2× times extension. The proposed dual resonance EMEH also has more than 2 times wider frequency range than other state-of-art wideband EMEHs. Therefore, the proposed dual resonance EMEH is demonstrated in this paper for a high maximum NPD and higher NPD over a wide frequency range.
The Method for Determining the Vibration-Damping Elements for the Mechanical System to Obtain the Desired Amplitude Value

The paper presents the use of synthesis methods to determine the parameters of passive vibration reduction in mechanical systems. Passive vibration reduction in a system is enabled by units called dampers whose values are determined on the basis of the method formulated and formalized by the authors. The essence of the method are, established at the beginning of a task, dynamic characteristics in the form of the resonance and anti-resonance frequencies, and amplitudes of displacement, velocity or acceleration of vibration.
Optimization via FENSAP-ICE of Aircraft Hot-Air Anti-Icing Systems

This paper presents a methodology for the optimization of hot-bleed-air anti-icing systems, known as Piccolo tubes. Such systems are widely used to anti-ice the wings of many commercial aircrafts, ranging from regional to wide-body jet aircrafts. Having identified the most critical in-flight icing conditions, as well as any anti-icing system constraints as inputs, the ideal aim is to achieve fully-evaporative conditions over the heated surfaces. To do so, an optimization method based on three-dimensional computational fluid dynamics, reduced-order models, and genetic algorithms was constructed to determine the optimal geometric configuration of the Piccolo tube (jet angles, spacing of jets, and distance from leading edge). The external and internal airflows are computed using the finite element Navier–Stokes applications package (FENSAP-ICE). The methodology leads to significantly-improved configurations for threeto five-dimensional design spaces.
Process and impact of product data management implementation

According to the definition of CIMdata, Product Data Management (PDM) supports management of both data and the product development process during the total life cycle of the product. However, several problems exist with the adoption and implementation of PDM functionality in organisations. To learn more about the consequences of selecting and implementing PDM functionality, we have performed a survey in Dutch organisations already using PDM functionality. The survey is a step in our research aimed at developing a methodology for selecting and implementing PDM functionality in a specific context.
Enhancement of Radar Detection Accuracy Using H-Beam Wave Polarization in Random Media

This work addresses the range in which the accuracy of object identification is enhanced regardless of radar parameters. We compute the radar cross-section (RCS) of conducting objects in free space and random media. We use beam wave incidence and postulate its coherency with a finite width around an object located in the far field. Accordingly, we examine the impact of radar parameters on the RCS, where these parameters include the incident angle, target size and complexity, medium fluctuation intensity and the beam size of the incident waves. H-wave polarization is assumed for the waves’ incidence.
Research of the mathematical model and sudden symmetrical short circuit of the multi-phase permanent-magnet motor

Mathematical models of p-pair poles N-phase sine wave permanent magnet synchronous motors (PMSMs) in the abc static reference frame and d-q rotating reference frame are established. The maximum transient short-circuit current expression under the condition of an N phases symmetrical short circuit of the motor is deduced. Experiments show that the mathematical models established and short circuit current expressions deduced are correct.
ESTABLISHING A PREDICTION MODEL OF MAXIMAL OXYGEN UPTAKE FOR YOUNG ADULTS IN TAIWAN

ABSTRACT This study was aimed to establish a maximal oxygen uptake ([Vdot]O2max) prediction model using non-exercise variables for young adults in Taiwan. Thirty young individuals participated in this experiment. The accurate [Vdot]O2max was measured using the K4 telemetry system during increment cycling test. A significant difference in ([Vdot]O2max) between males (3.34 ± 0.69 liters · min−1) and females (2.07 ± 0.38 liters · min−1) was found. The results indicate that [Vdot]O2max was significantly correlated with gender, age and body mass index (BMI). BMI (kg · m−2) was computed from body weight in kilograms and body height in meters. The multi-regression model (N=24) for predicting [Vdot]O2max (liters · min−1) was obtained as: [Vdot]O2max = 3.127 + (0.980 × Gender)—(0.115 × Age) + (0.084 × BMI); R2 =77.3%. The accuracy of the model was evaluated by conducting a cross-validation analysis (N=6). In conclusion, the established model is a valid and efficient tool that can be used to estimate the [Vdot]O2max and to select workers for physical demanding jobs.
Novel loss reduction pulsewidth modulation technique for brushless dc motor drives fed by MOSFET inverter

It is well known that small power brushless dc motor (BLDCM) drives, which are fed by metal oxide semiconductor field effect transistors (MOSFET) inverters, have been widely applied to the information technology industry, especially for fan and spindle applications . For small power applications of BLDCM drives, due to the use of battery or/and limited space for heat dissipation, reduction of power consumption is one of the main concerns for the development of the associated pulsewidth modulation (PWM) technique. This paper presents a novel PWM technique for BLDCM drives fed by MOSFET inverters, which significantly reduces the conduction losses, and thereby dramatically reduces the heat dissipation. Comparative results with conventional PWM technique will be fully explored to highlight the advantages of the presented novel technique. Experimental results derived from spindle drive will be presented to confirm the theoretical analysis.
Prescribed fire enhances seed removal by ants in a Neotropical savanna

Seed dispersal and predation by animals often drive plant regeneration. In tropical savannas, such as the Cerrado of Brazil, fire is also a key process in ecosystem dynamics, consuming the lower vegetation strata and killing wildlife, but how fire affects seed‐animal interactions is virtually unknown. We investigated the effects of prescribed fires on the removal of diaspores from Miconia rubiginosa and sunflower Helianthus annuus in Cerrado from southeast Brazil. Using plots burned one month or one year before sampling and unburned controls, we assessed the effect of prescribed fire on microhabitat structure and diaspore removal by vertebrates and ants. Covered microhabitats experienced higher seed removal by vertebrates than open microhabitats, but microhabitat features did not influence seed removal by ants. Prescribed fire did not change the total amount of seed removal, and ants were responsible for most removals in burned and control plots. However, fire increased the importance of ants as agents of removal compared to vertebrates. These changes were probably mediated by changes in microhabitat cover. It is likely that species, whose seeds are often preyed upon by vertebrates, benefit from fire to escape predation, while the opposite would be true for those removed by granivorous ants. By changing microhabitats composition and frequency of seed removal by different agents, fire may create pulses of opportunities for certain plant species to increase their populations and enlarge their spatial distribution, while constraining others. However, how different fire intensities and frequencies influence seed fate of different species is still to be investigated.
Stacked series-fed linear array antenna with reduced sidelobe

At the C-band, a double-layer series-fed linear array antenna is proposed. T-shape and interdigital microstrip transmission lines are used to increase the impedance bandwidth and obtain a reduced sidelobe level (SLL). The antenna has a bandwidth (BW) of 28% (VSWR ≤ 2), a SLL of -20 dB and a gain of 13.5 dB across the BW of 23%. Details of the antenna design and the experimental results are presented.
Story-Wall: Lightweight Requirements Management for Agile Software Development

The majority of commercial requirements management tools tend to be costly, document-driven and used by large organizations undertaking traditional forms of software development. While they are not immediately in the spirit of the agile philosophy, which advocates live dialogue over documentation and encourages small teams of developers to do the simplest thing possible to satisfy a requirement, there are some fundamental practices supported by these tools that play a role in more agile forms of software development. This paper examines the core requirements management needs that are common to software development of all flavors and describes a tool concept designed to bring lightweight requirements management to the agile (predominantly XP) context. This work is based on experiences in using agile development practices within ibm.com, and on the transition from manually handling paper-based story cards to the use of first generation story management tools. The paper discusses early feedback on the concept from practitioners.
Isothermal Combustor Prediffuser and Fuel Injector Feed Arm Design Optimization Using the prometheus Design System

The Prometheus combustor design system aims to reduce the complexity of evaluating combustor designs by automatically defining pre-processing, simulation and post-processing tasks based on the automatic identification of combustor features within the CAD environment. This system enables best practice to be codified and topological changes to a combustor's design to be more easily considered within an automated design process. The following paper presents the Prometheus combustor design system and its application to the multi-objective isothermal optimization of a combustor prediffuser and the multi-fidelity isothermal optimization of a fuel injector feed arm in combination with a surrogate modelling strategy accelerated via a high performance graphical processing unit
Mcm Substrate with High Capacitance

It is well established that thin film capacitors have good electrical characteristics and for that reason are often used in high frequency applications. Unfortunately, it is also very difficult to form thin film capacitors on the relatively rough surface of cofired ceramics. We have investigated planarization of bottom capacitive electrodes which must make direct contact with a cofired ceramic surface, and adjustment and control of the T.C. E. difference between high dielectric constant material and the bass MCM ceramic substrate. Combining thin film capacitors with MCM substrates can result in high frequency decoupling capacitors (with 100X the capacitance of comparable cofired thin layer alumina constructions); space saving, and significant improvements in performance over conventional discrete chip capacitors.
The Relationship between Net Energy Use and the Urban Density of Solar Buildings

There is a paradoxical relationship between the density of solar housing and net household energy use. The amount of solar energy available per person decreases as density increases. At the same time, transportation energy, and to some extent, household operating energy decreases. Thus, an interesting question is posed: how does net energy use vary with housing density? This study attempts to provide insight into this question by examining three housing forms: low-density detached homes, medium-density townhouses, and high-density high-rise apartments in Toronto. The three major quantities of energy that are summed for each are building operational energy use, solar energy availability, and personal transportation energy use. Solar energy availability is determined on the basis of an effective annual collector efficiency. The results show that under the base case in which solar panels are applied to conventional homes, the high-density development uses one-third less energy than the low-density one. Improving the efficiency of the homes results in a similar trend. Only when the personal vehicle fleet or solar collectors are made to be extremely efficient does the trend reverse—the low-density development results in lower net energy.
MEMS Relay Optimization Design Algorithm Based on Particle Swarm Optimization

Mathematical model of the MEMS relay volume involves in mechanical, electrical, magnetic, thermal, etc., the MEMS relay optimization design is a constrained nonlinear function optimization problem. In this paper, aim at the disadvantages of standard Particle Swarm Optimization algorithm like being trapped easily into a local optimum, we improves the standard PSO and proposes a new algorithm to solve the overcomes of the standard PSO. The new algorithm keeps not only the fast convergence speed characteristic of PSO, but effectively improves the capability of global searching as well. Experiment results reveal that the proposed algorithm can find better solutions when compared to other heuristic methods and is a powerful optimization algorithm for MEMS relay optimization design.
Explaining the Riddle of Tension Stiffening Models for Shear Panel Experiments

Analyses of reinforced and prestressed concrete structures based on a smeared crack approach generally include a tension stiffening relationship to estimate the average concrete tensile stress after cracking. Many such equations have been developed over the years and show significant differences between them. In this study, three of these equations are compared and it is shown that the variation between the equations can be explained by the different bond conditions of the specimens tested to calibrate the equations. An expression is proposed to quantify this effect and sample results are shown. Use of this relationship should allow more realistic estimates of crack width and stiffness at service loads to be obtained.
The Kentucky Pawpaw Regional Variety Trial

The North American pawpaw [Asimina triloba (L.) Dunal] is in the initial stages of commercial production. Two pawpaw variety trial orchards were established in Kentucky to evaluate the suitability of various varieties for this region. The first orchard was planted in the fall of 1995 in Princeton, at the University of Kentucky Research and Education Center (UKREC). A second orchard was planted in the spring of 1998 at the Kentucky State University (KSU) Research Farm in Frankfort. A randomized complete block design was used in both plantings with 8 replicates of 28 grafted cultivars and advanced selections. Cultivars being evaluated included ‘Middletown’, ‘Mitchell’, ‘NC-1’, ‘Overleese’, ‘PA-Golden’, ‘Sunflower’, ‘Taylor’, ‘Taytwo’, ‘Wells’, and ‘Wilson’. The other 18 clones were selections from the PawPaw Foundation (PPF) breeding effort. Trunk cross-sectional area, number of fruit per tree, fruit weight, cumulative yield, cumulative yield efficiency, number of fruit per cluster, growing degree days required for ripening, harvest peak, harvest duration (days), and biennial bearing index all varied significantly among cultivars and advanced selections 7 to 9 years after planting at both planting sites. Fruit weight varied greatly, with some clones averaging less than 100 g per fruit (‘Middletown’, ‘Wilson’, and ‘Rappahannock’) and others averaging over 170 g per fruit (‘Overleese’, 8-20, ‘NC-1’, ‘Susquehanna’, ‘Wabash’, 5-5, and ‘Potomac’). ‘PA-Golden’ and 2-10 were early ripening clones while ‘Middletown’ and 9-47 were late ripening clones. Cumulative yield varied greatly, with some cultivars and advanced selections exceeding 30 kg/tree. Cumulative yield efficiency ranged from 0.38 to 0.91 kg/cm 2 TCA. Based on fruit size yield, and availability, ‘Potomac’, ‘Susquehanna’, ‘Wabash’, ‘Overleese’, ‘Shenandoah’, ‘NC-1’, and ‘Sunflower’ can be recommended for production in this region. Additional PPF advanced selections that show promise are 10-35, 9-58, 2-10, 8-20, 5-5, and 1-68.
Global Cooperative Output Regulation of Linear Multiagent Systems With Limited Bandwidth

This article investigates the global cooperative output regulation problem of continuous-time linear multiagent systems (MASs), under the communication constraint of limited bandwidth. With a novel scaling function strategy, a distributed protocol based on the sampled and quantized data is designed to solve this problem. Compared with the existing works on quantized control of MASs, not only the boundedness assumption on initial conditions is removed, but also the communication graph is not restricted to be balanced or strongly connected. Moreover, the proposed quantized cooperative output regulation protocol does not rely on any global information of the communication graph. A simulation example is finally presented to illustrate the effectiveness of the proposed quantized cooperative output regulation protocol.
Broadband Circularly Polarized Cavity Backed Slot Antenna Array with Broadband Sequential Rotation Feed

Abstract A broadband circularly polarized (CP) cavity backed antenna array with sequential rotation feed is presented in this letter. The proposed antenna consists of four square patches, a cavity and a broadband feed network. The octagonal cavity which connects ground planes of the patch substrate and the feed substrate is located between the two substrates. The measured −10 dB return loss bandwidth and 3-dB axial-ratio (AR) bandwidth are 87.06% and 80.52%, respectively. The measured 3-dB gain bandwidth is about 79.36% (3.8–8.8 GHz) with the maximum gain 7.49 dBi. The cross-polarization level is relatively high over the whole bandwidth.
Impact of synchronization errors on overlay and CD control

Quality of exposures on Step&Scan systems highly depends on stages synchronization. While scanning, wafer and reticle stages must have same relative speed (4x ratio) and directions. In this paper, we investigate the tolerance to lateral vibrations of 0.18micrometers and 0.12micrometers gate patterning respectively on an ASML PAS5500/750E scanner (KrF) and a PAS5500/900 scanner (ArF) exposure tools. Results should be given both on the MA impact on overlay and the MSD effect on CD control. But, as no adapted experimental method has been found to correlate overlay degradation to induced MA and then confirm the theory that 1nm of MA induces 1nm of translation, only results on CD control will be discussed, including lateral MSD impact on nominal CD variations, process latitudes degradations and intrafield CD dispersion. In particular, we will show that MSD effect on CD strongly differs from 248nm imaging process to 193nm one.
Detection of 2-Hydroxyglutarate by 3.0-Tesla Magnetic Resonance Spectroscopy in Gliomas with Rare IDH Mutations: Making Sense of “False-Positive” Cases

We have previously published a study on the reliable detection of 2-hydroxyglutarate (2HG) in lower-grade gliomas by magnetic resonance spectroscopy (MRS). In this short article, we re-evaluated five glioma cases originally assessed as isocitrate dehydrogenase (IDH) wildtype, which showed a high accumulation of 2HG, and were thought to be false-positives. A new primer was used for the detection of IDH2 mutation by Sanger sequencing. Adequate tissue for DNA analysis was available in 4 out of 5 cases. We found rare IDH2 mutations in two cases, with IDH2 R172W mutation in one case and IDH2 R172K mutation in another case. Both cases had very small mutant peaks, suggesting that the tumor volume was low in the tumor samples. Thus, the specificity of MRS for detecting IDH1/2 mutations was higher (81.3%) than that originally reported (72.2%). The detection of 2HG by MRS can aid in the diagnosis of rare, non-IDH1-R132H IDH1 and IDH2 mutations in gliomas.
Broad-Band Twisted-Wire Quadrature Hybrids (Short Papers)

A symmetrical 3-dB quadrature hybrid, consisting chiefly of a bifilar pair of twisted wires, is described. A cascade of two such hybrids can achieve an octave bandwidth with a 0.7-dB coupling error. Since this class of hybrid is simple, compact, and low in cost, its use may be preferred over the more common coaxial line or printed-circuit types in the frequency region below 1 GHz.
Restless Legs Syndrome Severity and Cognitive Function in Adults With Multiple Sclerosis: An Exploratory Pilot Study.

BACKGROUND Restless legs syndrome (RLS) is a sleep disorder present in as many as 26% of persons with multiple sclerosis (MS) and can be associated with cognitive function. The present study examined the relationships between RLS symptoms (severity, frequency, occurrence) and cognitive function in adults with MS who have RLS. METHODS Twenty-two participants attended 1 laboratory session and completed the International Restless Legs Syndrome Study Group Rating Scale (IRLS), the Restless Legs Syndrome-6 Scale, and then the Brief International Cognitive Assessment for Multiple Sclerosis battery consisting of the Symbol Digit Modalities Test; California Verbal Learning Test, Second Edition; and Brief Visuospatial Memory Test-Revised. RESULTS Nonparametric bivariate correlations indicated that worse IRLS total severity was associated with slower processing speed (ρ = -0.42), worse verbal memory (ρ = -0.63), and worse visual memory (ρ = -0.61); worse RLS severity at falling asleep was associated with worse verbal memory (ρ = -0.45) and worse visual memory (ρ = -0.55); and worse RLS severity during the day while active was associated with slower processing speed (ρ = -0.58), worse verbal memory (ρ = -0.52), and worse visual memory (ρ = -0.60). CONCLUSIONS These results suggest that those with more severe RLS, including worse symptoms at falling asleep and during the day while active, might experience worse cognitive function, particularly processing speed and memory. Future research should evaluate whether treatment of RLS symptoms can offer new opportunities for managing cognitive dysfunction in adults with MS.