Miracle-dz/UniFAR-FTUs huggingface dataset:
Effect of viscous dissipation on mixed convection flow of water near its density maximum in a rectangular enclosure with isothermal wall

Purpose – To investigate the effect of viscous dissipation on unsteady, combined convective heat transfer to water near its density maximum in a rectangular cavity.Design/methodology/approach – The upwind finite difference scheme along with successive over relaxation iteration technique is used to solve the governing equations for mixed convection flow of water with density maximum inversion in a rectangular cavity.Findings – The effect of viscous dissipation was to increase the fluid temperature and resulted in the formation of vortex motion near the lower part of the cavity in an opposite direction to the central vortex. An increase in the Eckert number and Reynolds number of the flow resulted in augmented surface heat transfer rates from the top heated surface.Research limitations/implication – The analysis is valid for unsteady, two dimensional laminar flow. Isothermal conditions are assumed for the top and bottom walls. An extension to unsteady three dimensional flow case is left for future work.Prac.
High Gain End-fire Antenna Based on Spoof Surface Plasmon Polariton

A high-gain end-fire antenna based on Spoof Surface Plasmon Polariton is proposed. The antenna consists of SSPP transmission line loaded with two G-shaped resonators and five SSPP arrays. Better impedance matching can be achieved by adjusting the length of the SSPP transmission line. The antenna gain can be improved by adjusting the number of SSPP arrays. The antenna has a broadband characteristic of 14.4% (8.52-9.85 GHz) with a peak gain of 8.84 dBi at 9.60 GHz. The proposed antenna structure has a high antenna gain compared to other end-fire antennas.
Age-at-Death Estimation: Accuracy and Reliability of Common Age-Reporting Strategies in Forensic Anthropology

Forensic anthropologists build a biological profile—consisting of sex, age, population affinity, and stature estimates—to assist medicolegal stakeholders in the identification of unknown human skeletal remains. While adult age-at-death estimations can narrow the pool of potential individuals, a lack of standards, best practices, and consensus among anthropologists for method selection and the production of a final age estimate present significant challenges. The purpose of this research is to identify age-reporting strategies that provide the most accurate and reliable (i.e., low inaccuracy and low bias) adult age-at-death estimates when evaluated considering the total sample, age cohort (20–39; 40–59; 60–79), and sex. Age-reporting strategies in this study were derived from six age-at-death estimation methods and tested on 58 adult individuals (31 males, 27 females) from the UTK Donated Skeletal Collection. An experienced-based estimation strategy was also assessed. A paired-samples t-test was used to determine whether there was a significant difference (p ≤ 0.05) between the mean estimated age and the actual age for all age-reporting strategies. Results show that the most accurate and reliable age-reporting strategy varied if the sample was evaluated as a whole, by age, or by sex. While none of the age-reporting strategies evaluated in this study were consistently the most accurate and reliable for all of the sample categories, the experience-based approach performed well for each group.
Spectral losses of low-OH-content optical fibres

Very-low-OH-content optical fibres consisting of borosilicate-cladding phosphosilicate-core have been produced by a chemical vapour deposition technique. One of the fibres, whose transmission loss was less than 1 dB/km between 0.95 and 1.37 μm, showed a minimum loss of 0.47 dB/km at 1.2 μm.
Put Theory into Practice Knowledge Graph Based Aviation Quality Reliability Knowledge System

Though with difficulties in deep mining and adequate utilization, a profusion of the accumulated basic aviation quality data contains domain knowledge involving abundant quality issues/failure feature elements and incidence relation between them, taking on the significance of conducting retrospective analysis on quality issues, making the advance decision and judgment on quality work, and improving aviation product quality level. The paper sets its sights on the application requirements of aviation quality reliability domain data, probes into the establishment and application of the knowledge graph-based aviation quality reliability domain knowledge system, and elaborates on the requirement background, purpose and significance, process methods and application practices. The knowledge prototype system furnishes paths and means for the standardization and structuring of aviation quality data, knowledge graph establishment of aviation quality, and the sharing and utilization of aviation quality knowledge.
Modularity and neuronal heterogeneity: Two properties that influence in vitro neuropharmacological experiments

Introduction The goal of this work is to prove the relevance of the experimental model (in vitro neuronal networks in this study) when drug-delivery testing is performed. Methods We used dissociated cortical and hippocampal neurons coupled to Micro-Electrode Arrays (MEAs) arranged in different configurations characterized by modularity (i.e., the presence of interconnected sub-networks) and heterogeneity (i.e., the co-existence of neurons coming from brain districts). We delivered increasing concentrations of bicuculline (BIC), a neuromodulator acting on the GABAergic system, and we extracted the IC50 values (i.e., the effective concentration yielding a reduction in the response by 50%) of the mean firing rate for each configuration. Results We found significant lower values of the IC50 computed for modular cortical-hippocampal ensembles than isolated cortical or hippocampal ones. Discussion Although tested with a specific neuromodulator, this work aims at proving the relevance of ad hoc experimental models to perform neuropharmacological experiments to avoid errors of overestimation/underestimation leading to biased information in the characterization of the effects of a drug on neuronal networks.
100-Driver: A Large-Scale, Diverse Dataset for Distracted Driver Classification

Distracted driver classification (DDC) plays an important role in ensuring driving safety. Although many datasets are introduced to support the study of DDC, most of them are small in data size and are short of diversity in environmental variations. This largely limits the development of DDC since many practical problems such as the cross-modality setting cannot be fully studied. In this paper, we introduce 100-Driver, a large-scale, diverse posture-based distracted diver dataset, with more than 470K images taken by 4 cameras observing 100 drivers over 79 hours from 5 vehicles. 100-Driver involves different types of variations that closely meet real-world applications, including changes in the vehicle, person, camera view, lighting, and modality. We provide a detailed analysis of 100-Driver and present 4 settings for investigating practical problems of DDC, including the traditional setting without domain shift and 3 challenging settings (i.e., cross-modality, cross-view, and cross-vehicle) with domain shifts. We conduct comprehensive experiments on these 4 settings with state-the-of-art techniques and show several insights to the future study of DDC. Our 100-Driver will be publicly available offering new opportunities to advance the development of DDC. The 100-driver dataset, source code, and evaluation protocols are available at https://100-driver.github. io.
STELLAR PULSATIONS AND PERIOD CHANGES IN THE SX PHOENICIS STAR XX CYGNI

Time-series photometric observations were made for the SX Phoenicis star XX Cyg between 2007 and 2011 at the Xinglong Station of National Astronomical Observatories of China. With the light curves derived from the new observations, we do not detect any secondary maximum in the descending portion of the light curves of XX Cyg, as reported in some previous work. Frequency analysis of the light curves confirms a fundamental frequency f0 = 7.4148 cycles day−1 and up to 19 harmonics, 11 of which are newly detected. However, no secondary mode of pulsation is detected from the light curves. The O−C diagram, produced from 46 newly determined times of maximum light combined with those derived from the literature, reveals a continuous period increase with the rate of (1/P)(dP/dt) = 1.19(13) × 10−8 yr-1. Theoretical rates of period change due to the stellar evolution were calculated with a modeling code. The result shows that the observed rate of period change is fully consistent with period change caused by evolutionary behavior predicted by standard theoretical models.
Polyominoes: A Guide to Puzzles and Problems in Tiling

Polyominoes will delight not only students and teachers of mathematics at all levels, but will be appreciated by anyone who likes a good geometric challenge. There are no prerequisites. If you like jigsaw puzzles, or if you hate jigsaw puzzles but have ever wondered about the pattern of some floor tiling, there is much here to interest you. A polyomino is a shape cut along the lines from square graph paper; the pronunciation of polyomino begins as does polygon and ends as does domino. Tilings, also called tessellations of mosaic patterns, are older than civilization itself. Tiling with polyominoes provides challenges that range from the popular jigsaw-like puzzles to easily understood mathematical research problems. You will find unsolved puzzles and problems of both kinds here. Answers are provided for most of the problems that have known solutions. It is only fair to repeat here the warning stated in the preface to this book, 'Playing with polyominoes can be habit forming. '
Inference of !-languages from pre$xes

B+ uchi automata are used to recognize languages of in$nite strings. Such languages have been introduced to describe the behavior of real-time systems or in$nite games. The question of inferring them from in$nite examples has already been studied, but it may seem more reasonable to believe that the data from which we want to learn is a set of $nite strings, namely the pre$xes of accepted or rejected in$nite strings. We describe the problems of identi$cation in the limit and polynomial identi$cation in the limit from given data associated to di2erent interpretations of these pre$xes: a positive pre$x is universal (respectively existential) when all the in$nite strings of which it is a pre$x are in the language (respectively when at least one is); the same applies to the negative pre$xes. We prove that the classes of regular ! -languages (those recognized by B+ automata) and of deterministic ! -languages (those recognized by deterministic B+ uchi automata) are not identi$able in the limit, whatever interpretation for the pre$xes is taken. We give a polynomial algorithm that identi$es the class of safe languages from positive existential pre$xes and negative universal pre$xes. We show that this class is maximal for polynomial identi$cation in the limit from given data, in the sense that no superclass can even be identi$ed in the limit. c 2003 Elsevier B.V. All rights reserved. MSC: 68T05
Research on Fault Diagnosis of Reciprocating Compressor Based on GAF and Inception-ResNet-v2

The fault signal of the reciprocating compressor has many excitation sources and nonlinear. Deep learning can solve such problems. However, with the deepening of the network, the amount of model parameters is increased, and the phenomenon of gradient disappearance or explosion may occur. In addition, one-dimensional signals are used for diagnosis, which is easy to lose time dependence, resulting in unstable accuracy. In view of the fact that the two-dimensional images generated by the Gramian Angular Field contain the temporal correlation of one-dimensional sequences, and the Inception-ResNet-v2 can reduce parameters and avoid the phenomenon of gradient disappearance or explosion, this paper proposes a fault diagnosis method for reciprocating compressor based on GAF and Inception-ResNet-v2 to solve the above problems. First, the GAF method is used to convert the one-dimensional vibration signal into two-dimensional images to preserve the time correlation of the one-dimensional vibration data. Then, the generated two-dimensional images are input into Inception-ResNet-v2 for feature extraction, and the Adam optimizer is used for optimization to improve the convergence speed of the model. Finally, the extracted features are input into the softmax classifier to obtain the classification results. The experimental results show that the method can effectively identify the fault types of the reciprocating compressor, with an accuracy rate of 99.7%. In order to prove the superiority of this method, the methods of PIL+Inception-ResNet-v2, GAF+Inception-ResNet-v2, PIL+ResNet50 and GAF+ResNet50 are selected for comparison. The GAF+Inception-ResNet-v2 method has the highest accuracy rate, and the PIL+ResNet50 method has the lowest accuracy rate of 91.25%. Inception-ResNet-v2 converges faster than ResNet50. The results show that the images generated by GAF can retain more feature information, and Inception-ResNet-v2 improves the accuracy of network classification while reducing the amount of parameters and computation. GAF and Inception-ResNet-v2 can improve the overall model's effect in reciprocating compressor fault diagnosis.
An analytical formulation of the double-pulse s-process model

Recent studies of the astrophysical site of the s-process suggest a double-pulse s-process in the He-burning shell of low-mass asymptotic giant branch stars, where the 13 C(α, n) and the 22 Ne(α, n) neutron sources are active as well. Previous analyses have been performed in terms of a pulsed neutron s-process from intermediate-mass stars. The periodic neutron bursts were ascribed to the 22 Ne(α, n) reaction only. The current effort is to reformulate the mathematics of the s-process to study the combined effect of repeated double pulses with different properties.
THE PREVALENCE OF ANNOYANCE AND EFFECTS AFTER LONG-TERM EXPOSURE TO LOW-FREQUENCY NOISE

Abstract A cross-sectional questionnaire and noise measurement survey was undertaken among 279 randomly chosen persons exposed to noise from heat pump/ventilation installations in their homes. The aim was to evaluate the prevalence of annoyance, disturbance of rest and concentration and the presence of psycho-social and medical symptoms in relation to noise exposure. Of the sample, 108 persons were exposed to a noise classified as of a low-frequency character (low-frequency noise exposed). As controls were chosen 171 persons living in similar residential areas, but exposed to a noise classified as of a mid-frequency character. The results showed that the prevalence of annoyance and disturbed concentration and rest was significantly higher among the persons exposed to low-frequency noise as compared to controls. Annoyance was suggested to be related to the sound pressure levels of the dominant low frequencies. The dB (A) noise levels did not predict annoyance. No significant differences in medical or psycho-social symptoms were found between the low-frequency noise exposed persons and controls. Among persons reporting themselves to be “rather” or “very” annoyed by low-frequency noise due to the heat pump/ventilation installations, a higher extent of psycho-social symptoms, sleep disturbance and headaches was found.
Effect of Ni–Zn ferrite on bandwidth and radiation efficiency of embedded antenna for mobile phone

Performance of inverted F meander antenna with a lossy ferrite film was investigated and compared to air-core antenna with the same design. We have fabricated ferrite film antenna using 3μm thick plated Ni0.21Zn0. 45Fe2.34O4. Loss tanδμ of the plated ferrite was about 1.5 around 500MHz. It was found that bandwidth significantly increased by the use of lossy ferrite, while radiation efficiency (RE) decreased. However, the RE increases as the thickness of lossy ferrite film decreases below 10μm. The fractional bandwidth of ferrite film antenna was found to be 13.8%, which shows a 431% as compared to an air-core antenna. The center frequency (fc) for ferrite film antenna decreased from 584to534MHz of the air-core antenna. This implies 7.5% decrease in the fc, while the gain of the ferrite was not much lower than the air-core antenna. Lossy ferrite thin film has been found to be effective in broadening of bandwidth, while retaining an acceptable gain.
Cartilage Repair of the Tibiofemoral Joint With Versus Without Concomitant Osteotomy: A Systematic Review of Clinical Outcomes

Background: The extent to which concomitant osteotomy provides an improvement in clinical outcomes after cartilage repair procedures is unclear. Purpose: To review the existing literature to compare clinical outcomes of patients undergoing cartilage repair of the tibiofemoral joint with versus without concomitant osteotomy. Study Design: Systematic review; Level of evidence, 4. Methods: A systematic review was conducted according to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines by searching PubMed, the Cochrane Library, and Embase to identify studies that directly compared outcomes between cartilage repair of the tibiofemoral joint alone (group A) versus cartilage repair with concomitant osteotomy (high tibial osteotomy [HTO] or distal femoral osteotomy [DFO]) (group B). Studies on cartilage repair of the patellofemoral joint were excluded. The search terms used were as follows: osteotomy AND knee AND (“autologous chondrocyte” OR “osteochondral autograft” OR “osteochondral allograft” OR microfracture). Outcomes in groups A and B were compared based on reoperation rate, complication rate, procedure payments, and patient-reported outcomes (Knee injury and Osteoarthritis Outcome Score [KOOS], visual analog scale [VAS] for pain, satisfaction, and WOMAC). Results: Included in the review were 5 studies (1 level 2 study, 2 level 3 studies, 2 level 4 studies) with 1747 patients in group A and 520 patients in group B. The mean patient ages were 34.7 and 37.5 years in groups A and B, respectively, and the mean lesion sizes were 4.0 and 4.5 cm2, respectively. The mean follow-up time was 44.6 months. The most common lesion location was the medial femoral condyle (n = 999). Preoperative alignment averaged 1.8° and 5.5° of varus in groups A and B, respectively. One study found significant differences between groups in KOOS, VAS, and satisfaction, favoring group B. The reoperation rates were 47.4% and 17.3% in groups A and B, respectively (P < .0001). Conclusion: Patients undergoing cartilage repair of the tibiofemoral joint with concomitant osteotomy might be expected to experience greater improvement in clinical outcomes with a lower reoperation rate compared with those undergoing cartilage repair alone. Surgeons preparing for cartilage procedures of the knee joint should pay particular attention to preoperative malalignment of the lower extremity to optimize outcomes.
Edge Server Quantification and Placement in Vehicle Ad Hoc Networks

A vehicular ad hoc network (VANET) consists of groups of moving/stationary vehicles and roadside units (RSUs) connected by a wireless network. The growing number of networked vehicles makes the traditional deployment of RSU hard to maintain high-efficiency, low-latency task offloading on roads with high traffic flow. Introducing the edge servers into the VANET is a solution for increasing the efficiency. However, how to determine the arrangement of edge servers (ESs) according to the size of traffic flow has become a new challenge. To solve this problem, we propose a collaborative method named DCK for ES quantification and arrangement in the combination with the actual road condition problem. Furthermore, a priority-based K-means algorithm and ES weighted selection strategy are proposed to balance the workload and transmission delay of ESs within the coverage area. We evaluated our mechanism in the real-world data, the experimental results illustrated that our method reduces the latency range of tasks to 3.45ms, while improving the workload balance by 45 % ~ 75 %, which is better than existing works.
A Survey on Network Controlled Repeater Technology

Network controlled repeater (NCR) is a new type of repeater vigorously promoted by the international industry to supplement the coverage provided by regular cells. Compared to the legacy RF, NCR can perform the amplify-and-forward operation more efficiently with the assistance of side control information. Based on the side control information, the beam, timing, UL-DL, ON-OFF and power control configuration of the NCR can be optimized. The paper illustrates the structure, side control information, identification and authorization of NCR. Additionally, the numerical results show that NCR can provide noticeable improvement compared to legacy RF repeaters.
Editorial: Functional columnar organization and long-range circuits in different cortical systems

COPYRIGHT © 2023 Schmidt and Galuske. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. Editorial: Functional columnar organization and long-range circuits in di erent cortical systems
Larger polarization and weak ferromagnetism in quenched BiFeO3 ceramics with a distorted rhombohedral crystal structure

Single-phase insulating BiFeO3 ceramics have been synthesized by a simple but effective method that conventional solid state reaction is followed immediately by quenching processing. At room temperature, the ceramics show a metastable, distorted rhombohedral phase and the refined structure parameters are presented based on x-ray diffraction. It is revealed that the formations of Fe2+ and oxygen deficiency are greatly suppressed by the quenching processing. A well-saturated ferroelectric hysteresis loop with a large remnant polarization (2Pr=23.5μC∕cm2) is observed with an applied field of 155kV∕cm. Temperature-dependent magnetic property is investigated and weak ferromagnetism with a remnant magnetization of 4×10−6μB∕Fe at 10K is established. These results may have implications for further studies on multiferroics.
Low-Profile off-Body Wearable Antenna for Biomedical Applications

In this work, a wearable off-body antenna with very-low profile dimensions of $0.21\lambda_{0} \times 0.27\lambda_{0} \times 0.007\lambda_{0}$, operating at 5.8 GHz, is proposed. This antenna is capable of working in both free space and on body. Thus, it has been characterized and fabricated for both scenarios. The gain, on-body efficiency, and bandwidth of the antenna are 4.4 $\mathbf{dBi}$, 13.2%, and 42%, respectively, showing a better performance than its counterparts. Being low-profile, small, robust, easy-to-fabricate, efficient, fairly wideband, and low-cost, this antenna can be used in biomedical sensing applications. Also, owing to its unidirectional radiation pattern, this antenna can be used in off-body WBAN communication systems.
On the dynamics of mass transfer over an accretion disk

The vertical dynamics of a gas stream as it flows over a disk in a semidetached binary are studied. For plausible parameters, the gas stream at several scale heights above the binary orbit plane is able to flow over the disk once it passes the disk edge. Relatively high, free-flowing gas collides with the disk near the stream's closest approach with the compact object. The resulting emission is identified with a feature found in the Doppler tomography of dwarf nova Z Cha. These results can also explain the origin of asymmetric emission lines in other dwarf novae and dips in low-mass X-ray sources. 23 refs.