Miracle-dz/UniFAR-FTUs huggingface dataset:
Impact on the Wave Parameters Estimation of a Kinetic Energy Harvester Embedded into a Drifter

The effect of a Kinetic Energy Harvester (KEH) on the wave parameters estimation at a WAVY Ocean (WO) drifter is being studied. An algorithm has been developed to calculate the wave parameters from the Inertial Measuring Unit (IMU) embedded on the drifter. Simulations performed by OrcaFlex have been used to refine the algorithm and assess the measurement errors derived from the drifter response. Finally, a WO prototype has been deployed in the controlled environment of CIEM wave flume. Results prove that the KEH has no significant impact on the wave parameter estimation.
Optimizing Antenna Arrays for Spatial Multiplexing: Towards 6G Systems

In this paper we discuss the design of antenna arrays to be used for multiplexing applications. In particular, we introduce a suitable performance index to analyze the effect of the antenna geometry and the distribution of users for the overall performance of Multi-User Multiple Input Multiple Output systems. By means of such performance index, antenna arrays can be designed so as to increase the number of multiplexed parallel sub-channels. Numerical results show that a proper design could allow to double the contemporary served users and the overall system throughput.
Thermal Effect on AMF Electrodes at Different Opening Speeds

The erosion and thermal states at current zero for the axial magnetic field (AMF) electrodes after high-current vacuum arcs (HCVAs) were studied at an average opening speed of 2 m/s. The results obtained are compared with similar results received earlier at an average opening speed of 1 m/s. The discharge was ignited in a demountable vacuum chamber by opening the contacts and was fed with the half-sine current pulse of 10 ms in duration. To determine the thermal state of the surface of the electrodes at zero current, a Phantom MIRO M310 high-speed video camera with a Carl Zeiss 100 mm F2 lens was used. In addition, the surface of the electrodes after the arc exposure was photographed by a Canon camera. The study showed that at the same current an increase of the opening speed leads to an increase in the thermal effect on the electrodes. Besides, the work revealed that at high opening speed (HOS) the process of appearances of erosion traces on the cathodes and, especially, on the anodes, is significantly different. The estimations made in the work showed that the difference in erosion traces on the anode is associated not only with an increase in the thermal effect but also with a change in the momentum transferred to the anode by cathode jets due to jets relaxation in the interaction with the secondary anode plasma in a long arc.
Statistical Methods in Ocean Prediction

Statistical analysis methods have always played an important role in oceanic and meteorological research. Due to the lack of observation methods, insufficient data samples, and the statistical prediction performance was not satisfactory in the early years. With the development of satellite observation, computing capabilities, and artificial intelligence algorithms, statistical prediction technology has ushered in a new period of development. Since the 20th century, many new methods have emerged, providing new ideas for ocean prediction. This paper reviews the development for statistical methods in ocean prediction, summarizes the representative prediction methods, and casting the prospects in the development of ocean statistical prediction.
The impact of activity sensors on attitudes and behavior among young and elderly people

Wearable activity sensors have the potential to reduce sedentary behavior and improve overall health status. Although there is a technology usage gap between young and elderly people, the impact of activity sensors still has not been clearly identified between them yet. Therefore, we explored the differences in physical activity performance, motivation, and attitudes between young (age: 22.4±1.3 years; N = 36) and elderly people (age: 71.7±2.0 years; N = 30) through a six-week usage of activity sensors. It was identified that there was no significant difference in walked steps between the two age groups. However, elderly participants showed more adherence to complete their daily activity goal compared to young participants. In addition, the elderly group had higher attitude scores in the activity commitment, the satisfaction of activity monitoring, and the significance of physical activity than the youth group. These findings support that elderly people are more likely to have positive attitudes and a higher activity obligation when using activity monitoring technology than youth.
Fixed Frequency Beam-Scanning HMSIW-Based Leaky-Wave Antenna Composed of Circular Slots in V-Shape Configuration

A new reconfigurable slotted antenna is presented in this manuscript. The proposed antenna is realized on a half-mode substrate integrated waveguide (HMSIW). The beam-steering is achieved using embedded varactor diodes in circular cells. Sweeping the bias voltage causes variations of the phase constant, which leads to the fixed frequency beam-scanning. Each reconfigurable cell includes a circular slot at the top plate and varactor switch, DC block, and RF block at the backside of the structure. The operating frequency is chosen as 28.5 GHz in the support of the upcoming 5G mm-wave communications systems. The proposed antenna beam scans 29° of space by switching among different states at 28.5 GHz. The length, width, and height of the antenna are 67 mm, 48 mm, and 0.32 mm, respectively. The proposed antenna’s main novelties are compactness and electronic beam-scanning capability using a single switch per cell. The measured peak realized gain and sidelobe level (SLL) at 28.5 GHz are 8.2 ± 0.6 dBi and 5 dB, respectively. While the impedance bandwidth of the proposed antenna is 1.5 GHz. A good agreement between measured and simulated results is observed. The discrepancies are investigated through a sensitivity analysis. Fixed frequency beam-scanning capability, compactness, simplicity of the assembly, backward radiation, and slight gain variation of the proposed antenna make it a suitable candidate for blind-spot monitoring and 5G vehicle to everything (V2X) communications.
CATNAP-Sim: A Comprehensive Exploration and a Nonvolatile Processor Simulator for Energy Harvesting Systems

<italic>Editor’s note:</italic> This article introduces an architecture exploration tool to study and understand the tradeoffs of future processor systems using nonvolatile memory and help guide the design of the future. — <italic>Sherief Reda, Brown University</italic> — <italic>Leon Stock, IBM</italic> — <italic>Pierre-Emmanuel Gaillardon, University of Utah</italic>
Design of High-frequency RFID based Real-Time Bus Tracking System

This paper describes a design of IoT enabled real-time bus tracking system. In this work a bus tracking mobile phone app is developed, using that people can exactly locate the bus status and time to bus arrival at bus-stop. This work uses high-frequency RFID tags at buses and RFID receivers at busstops and with NodeMCU real-time RIFD tagging (bus running) information is collected and uploaded on the cloud. Users can access the bus running and status from the cloud on the mobile app in real-time.
Microwave Frequency Comb Generation by Gain-Switching Versus Relaxation Oscillations

Optoelectronic feedback on a laser diode is demonstrated to generate two distinct modes of periodic pulse-train formation depending on the injection current <inline-formula> <tex-math notation="LaTeX">$J$ </tex-math></inline-formula> of the laser leading to microwave combs in two distinct regimes. For <inline-formula> <tex-math notation="LaTeX">$J$ </tex-math></inline-formula> close to the threshold current <inline-formula> <tex-math notation="LaTeX">$J_{th}$ </tex-math></inline-formula>, the pulse repetition rate <inline-formula> <tex-math notation="LaTeX">$f_{\mathrm{ rep}}$ </tex-math></inline-formula> is the inverse of the loop delay. This behavior is attributed to feedback-induced gain-switching and leads to comb spacings in the tens of MHz range. In contrast, for <inline-formula> <tex-math notation="LaTeX">$J \simeq 2J_{th}$ </tex-math></inline-formula>, the repetition rate <inline-formula> <tex-math notation="LaTeX">$f_{\mathrm{ rep}}$ </tex-math></inline-formula> is observed to be related to the relaxation-oscillation frequency <inline-formula> <tex-math notation="LaTeX">$f_{\mathrm{ RO}}$ </tex-math></inline-formula>. The potential to generate pulse trains and associated microwave combs may find use in metrology, optical communications, optical sampling, and spectroscopy.
Signal-to-Noise Ratio and Mean Square Error Improving Algorithms Based on Newton Filters for Measurement ECG Data Processing

This article presents the results of analysis of measuring ECG signals processing using two new filtering algorithms for low-frequency and high-frequency interference. The presence of such interferences leads to a decrease in the accuracy of the selection of informative components of the measuring signals. To eliminate low-frequency and high-frequency interference, the results of evaluating the effectiveness of two new algorithms for ECG signals are presented. The processing algorithms are based on a polynomial approximation of the high-pass filter and the wide-band notch filter cascade using Newton polynomials. On the basis of these processing algorithms, its performance was analyzed on a priori models of ECG signals and interference, and on the basis of quantitative indicators, its effectiveness was compared with respect to known algorithms. It was found that processing algorithms based on Newton polynomials significantly improve the quality of filtering of measuring ECG signals and indicators of signal-to-noise ratio and mean square error.
Charge transport in disordered organic semiconducting dendrimers studied by space-charge-limited transient currents

The thesis concerns space-charge-limited transient current measurements in thin (le500 nm) organic films. Such films find important applications in organic electronics, where they are referred to as organic semiconductor layers. Electrical transport in such films depends on bulk charge carrier transport and trapping, as well efficiency of charge carrier injection from electrodes. These, are all in turn depend on disorder inherent to organic materials. The transient measurement approach is very attractive, as it can, in principle, deliver information on all these aspects in one single measurement. In the thesis, three main contributions are presented. 1) A transimpedance amplifier based setup for space-charge-limited current transient measurement is validated. This type of setup is superior to the widely used bridge circuit, notably because of better current sensitivity, bandwidth, no need for bridge symmetry and no need for per sample adjustment. It is demonstrated that initial displacement current spike, which saturates the amplifier at the beginning of measurement, does not introduce error in the measurement of mobility. 2) A dendrimer molecule has been investigated. Experimental current responses are shown to be in agreement with the drift-diffusion model. However, obtaining agreement requires well defined initial conditions in experiment as well as in simulation, and also complete theoretical model of the sample. In the case of dendrimer, this model had to take into account both contact barrier and trapping effects. Furthermore, better agreement was obtained when taking disorder effects into account. 3) The impossibility of obtaining any agreement without complete physical model of the sample indicates that trapping, contact barrier and mobility parameters could be fitted without ambiguity. Therefore, complete electrical characterization consistent with simulation can be obtained using the transient technique. The results obtained further increase well known usefulness of transient space-charge-limited current characterization of thin organic films.
Nestmate Recognition and Cuticular Hydrocarbon Profiles in the Ant Formica argentea

50 Introduction 51 Methods 54 Results 57 Discussion 58 Figures 62 Chapter Five: Differences in cuticular hydrocarbon profiles and their effects on the behavior of Formica argentea 68 Abstract 69 Introduction 70 Methods 73 Results 76 Discussion 77 Tables 80 69 Introduction 70 Methods 73 Results 76 Discussion 77 Tables 80 Chapter Six: Temporal variation of cuticular hydrocarbons in Formica argentea workers: differences among structural classes 81 Abstract 82 Introduction 83 Methods 85 Results 88 82 Introduction 83 Methods 85 Results 88
Pose Estimation of Multiple X-ray Cameras Using Planar Markers and Epipolar Consistency

This paper introduces an image-based approach for estimating pose of multiple X-ray cameras capturing a diagnostic part such as a wrist, in an orthopedic surgery. The proposed method uses a calibration plane in which five fiducial lead-markers are positioned in a parallelogram pattern. We assume that the calibration plane is attached to the target part and observed in every view. Initial camera extrinsic parameters are calculated from planar homography, followed by a nonlinear optimization using reprojection error. Views with high reprojection error are further refined using epipolar consistency. We evaluate our method by simulating a Conebeam CT trajectory using digitally reconstructed radiographs from a CT model of a wrist phantom.
The kindness of strangers? An investigation into the interactions of motivations among contributors to online crowdfunding

This study investigates the interaction of motivations among contributors to online crowdfunding campaigns. Based on evidence from the literature on philanthropic behaviour, we argue that funder behaviour is likely to be driven by a combination of intrinsic, extrinsic and image enhancement motivations. We undertake an empirical investigation into the relationships between these factors by analysing data from an online rewards-based crowdfunding platform. These data not only reveal the monetary values of individual contributions to fundraising campaigns, but also indicate particular combinations of motivations based on the material reward selected (if any) and the decision as to whether or not to contribute anonymously. We find that extrinsically motivated funders generally make larger contributions than intrinsically motivated funders, which does not suggest the presence of a ‘crowding-out’ effect given the presence of material incentives. We further show that named funders with intrinsic motivations contribute more than anonymous funders with intrinsic motivations, whereas the same pattern of behaviour is not observed among extrinsically motivated funders. The evidence from our study therefore suggests that image concerns interact with intrinsic and extrinsic motivations in different ways.
Human Papillomavirus Type 16 L1/L2 VLP Experimental Internalisation by Human Peripheral Blood Leukocytes

1 Human Papillomavirus Type 16 L1/L2 VLP Experimental Internalisation by Human 2 Peripheral Blood Leukocytes 3 4 Running Title: HPV16 VLP internalisation in human leukocytes. 5 6 Aurora Marques Cianciarullo 1,2# , Vivian Szulczewski 1,2 , Erica Akemi Kavati 1,2 , Tania 7 Matiko Hosoda 1,2 , Elizabeth Leão 4 , Primavera Borelli 5 , Enrique Boccardo 6 , Martin Müller 7 , 8 Balasubramanyam Karanam 8 , and Willy Beçak 1,9 9 10
Behavioral intervention in women with FiBromyalgia: CliniCal SigniFiCanCe and reliaBle Change

The aim of this study was to evaluate the effect of 20 sessions of intervention in analytic-behavioral on stress, anxiety, depression, social skills and disability of pain in women with fibromyalgia (n=4). The effects were measures by clinical significance and Reliable Change Index (JT Method, Jacobson & Truax). All participants answered self-report instruments to assess the variables and had the cortisol measured when awakening. After the intervention, we conclude that the sessions were effective, with positive changes in the scores of all instruments. However, no change in the cortisol response on awakening were found. Implications for future studies are discussed, for example, the importance in conducting evaluations using direct measures, beyond the self-report, to identification of clinical significance.
Flattening Firms and Wage Distribution

This article studies the consequences of firm delayering on wages and the wage distribution inside firms. I consider a job-assignment model with asymmetric information and a slot constraint. The model predicts that more efficient firms are not necessarily larger than less efficient firms if firms are allowed to adjust their internal organizational structure through delayering. After delayering, wages at all levels increase and the wage distribution becomes more unequal. These predictions match a set of empirical findings in recent studies that are not well explained by existing theories. JEL: J31, M51 ∗Jin: Department of Economics, University of South Florida, Tampa, FL 33620, xjin@usf.edu. I thank Michael Waldman, Julia Wulf, and Jan Zabojnik for their generous comments.
Supervised Machine Learning: Predispositions, Practices and Perspectives

Technology is growing rapidly in today’s fast moving world and everything is now expected to be done automatically by machine or bots instead of being driven manually by humans be it at office, home or outside markets. In every field, the intention of human is to reduce manual efforts and drive fastest results with high accuracy and efficiency. Machine learning is one such growing technology which is being adopted now a days in every field for improving efficiency. It is a subset of Artificial Intelligence (AI) which learns automatically by analysing data, repeatedly by identifying patterns, without any human intervention. Supervised , Unsupervised and Reinforcement Learning are the three major types of techniques used in Machine Learning. In this paper we have explained various Supervised Machine Learning techniques.
Modification of Park-Ang Damage Index to Accommodate Effect of Aftershocks on RC Structures

Available online at: www.jseeonline. com Seismic design codes do not consider the effects of aftershocks on structures. Moreover, most damage estimation methods disregard the effects of consecutive earthquakes. Recent earthquakes have demonstrated that the aftershocks can cause major damage to mainshock-damaged structures. After a strong seismic event, it should be determined if a mainshock-damaged building is safe for reoccupation in the event of aftershocks. This study examined the effects of both the main shock and aftershocks on the damage index of reinforced concrete (RC) structures. Records from 19 mainshocks that occurred in the Japan seismic region with moment magnitudes of greater than 4 were examined. More than 100 acceleration time series from these events (mainshock + aftershock events) were applied to evaluate the damage index. Seismic damage analysis was performed on a series of RC columns and RC frames. The natural period of these structures varied from 0.1 to 2.5 s. The damage index introduced by Park and Ang was employed to estimate the structural damage. Acceleration time series were applied to the structures in two steps. First, only mainshocks were applied to the structures and the damage index was obtained. Next, both the mainshock and aftershocks were applied to the structures and structures damaged by a mainshock were analyzed under periodic aftershock events. The results showed that the increase in structural period and the PGA of the aftershocks amplified the damage index under the effects of the aftershocks. A modification to Park-Ang damage index is proposed using a dimensionless term to accommodate the effect of aftershocks. Modification of Park-Ang Damage Index to Accommodate Effect of Aftershocks on RC Structures
Parasitic infection in captive wild mammals and birds in Bangabandhu Sheikh Mujib Safari Park, Cox’s Bazar, Bangladesh

We investigated the infection rate of gastrointestinal (GI) parasite eggs and premature stages from different wild animals and birds in Bangabandhu Sheikh Mujib Safari Park, Dulahazra, Cox’s Bazar. A total of 56 fecal samples were collected from 24 species during July to November 2012 using modified Stoll’s ova dilution technique. Coprology analysis revealed that the overall rate of parasitic infection was 78.6%, of which 51.8% were helminths and 35.7% protozoa. The identified parasites were Paramphistomum spp. (7.1%), Fasciola spp. (5.4%), strongyles (26.8%), Ascaris spp. (3.6%), Strongyloides spp. (7.1%), Dictyocaulus spp. (5.4%), Trichuris spp. (3.6%), Capillaria spp. (5.4%), Heterakis spp. (3.6%), and Balantidium coli (35.7%). Mixed infection (21.4%) was observed in nine animals, including co-infection with Balantidium coli and strongyles in Tiger Panthera tigris, Sambar Deer Rusa unicolor and Pig-tailed Macaque Macaca nemestrina, Strongyloides spp. , Trichuris spp. and larvae of Dictyocaulus spp. in Capped Langur Trachypithecus pileatus, Balantidium coli and Capillaria spp. in Clouded Leopard Neofelis nebulosa, Fasciola spp. and Balantidium coli in Spotted Deer Axis axis, Ascaris spp. and strongyles in African Elephant Loxodonta africana, Strongyloides spp. and Heterakis spp. in Peafowl Pavo cristatus and Heterakis spp. and strongyles coinfection in Great Pied Hornbill Buceros bicornis. It is concluded that GI parasites were prevalent in this safari park. Further epidemiological investigation is necessary for controlling parasitic infection.
Genotype and breeder flock age impact on broiler performance in suboptimal conditions

A comparative study of production traits was performed between COBB 500 broilers from a 52-week-old breeder flock and a ROSS 308 from two breeder flocks of different ages (52 weeks and molted flock 79-week-old) in equal, relatively suboptimal ambiental (temperature oscillations) and nutritional conditions (market feed of average quality). The experiment was performed on a total of 720 day-old chicks of both sexes in 4 experimental groups (Cobb; Ross 52; Ross 79; Ross mix - a mixture of Ross broilers from two breeder ages), with 6 replications per group and 30 chickens in each replication. Mortality, body weight (days 0, 7, 21 and 42), weight gain, feed conversion and production index (EPEF) were monitored in 42 days of fattening. It was determined that heavier day-old chickens (p<0.01) with better gain in the first week of production, were obtained from the older breeder flock. Except in the first week, Cobb generally had the highest (p<0.05) body weights and gains in the experiment, aside from in mid and the end of the test, where did not differ significantly from the body weight of the Ross 79 and Ross mix group of broilers, respectively. Results also indicate that genetics (used hybrid) may have a greater influence on the final body weight and daily gain in suboptimal test conditions than the breeder age. Cobb 500 broilers also had significantly higher mortality under test conditions (p<0.05). Feed conversion and the achieved EPEF production index did not vary significantly in the test in chickens of different genotypes or parents. In general, suboptimal conditions in our research constrained realisation of the genetic production potential, with a suppressive effect on both hybrids, higher on the growth in Ross 308, and on the resistance measured by mortality in Cobb 500 hybrids.
ShExStatements: Simplifying Shape Expressions for Wikidata

Wikidata recently supported entity schemas based on shape expressions (ShEx). They play an important role in the validation of items belonging to a multitude of domains on Wikidata. However, the number of entity schemas created by the contributors is relatively low compared to the number of WikiProjects. The past couple of years have seen attempts at simplifying the shape expressions and building tools for creating them. In this article, ShExStatements is presented with the goal of simplifying writing the shape expressions for Wikidata.