Miracle-dz/UniFAR-FTUs huggingface dataset:
Structural characterization of polymeric nanofibers of polyvinylidene fluoride (PVDF)

Polyvinylidene fluoride (PVDF) is a polymer material that exhibits piezoelectricity, which is the ability of certain materials to generate an electric charge in response to applied mechanical stress. Electrospun nanofibers were prepared from a solution with 1800 mg PVDF (18 wt.%) powder dissolved in 7.5 ml of dimethylformamide (DMF) and 2.5 ml acetone. The experimental setup used in the electrostatic deposition process was developed in our laboratory. Atomic Force Microscopy (AFM) showed that the fibers vary from 100 nm to 200 nm. Scanning Electron Microscopy (SEM) measurements showed distributed and well-formed nanofibers, but with few incidences of beads. The Energy Dispersive Spectroscopy (EDX) results showed that all points of the formed nanofibers have very similar chemical compositions, based on carbon and fluorine. Raman and Fourier Transform Infrared (FTIR) Spectroscopic analysis revealed the characteristic bands related to β-phase in the sample, which is responsible for the piezoelectricity of PVDF.
Threshold asymptotic behaviors for a delayed nonlocal reaction-diffusion model of mistletoes and birds in a 2D strip

A time-delayed reaction-diffusion system of mistletoes and birds with nonlocal effect in a two-dimensional strip is considered in this paper. By the background of model deriving, the bird diffuses with a Neumann boundary value condition, and the mistletoes does not diffuse and thus without boundary value condition. Making use of the theory of monotone semiflows and Kuratowski measure of non-compactness, we discuss the existence of spreading speed $c^\ast$. The value of $c^*$ is evaluated by using two auxiliary linear systems accompanied with approximate process.
An Exploration of Photovoltaic Performance of the Rb2SnI6 using DFT and SCAPS-1D

Perovskite with organic and lead-based cations work well, but their toxicity and stability have hindered their commercialization. In this study, we used WIEN2k software to perform first-principles calculations based on density functional theory (DFT) framework to determine the optical and electronic properties of the proposed perovskite material Rb2SnI6 to be used as an absorber for solar cells (SCs). The DFT results for band gap, carrier mobility, effective densities, and absorption spectra are put into the SCAPS (Solar Cell Capacitance Simulator)-lD software to estimate how well the proposed perovskite solar cell (PSC) structure (FTO/TiO2/Rb2SnI$\epsilon$/PTAA/Au) will work as a photovoltaic device. TiO2 and PTAA are employed as electron and hole transport materials respectively. We have also investigated the device performance with different organic hole transport layers (HTLs). The optimized series resistance ($\mathrm{R}_{\mathrm{s}}$) of 1 $\Omega$. cm2, Shunt resistance ($\mathrm{R}_{\mathrm{s}\mathrm{h}}$) of 1$ 0^{4}\Omega$. cm2, defect density of 1013c$\mathrm{m}^{-3}$, and thickness of 0.8 $\mu$m was used for the final simulation. The proposed device after optimization exhibits a $\mathrm{J}_{\mathrm{s}\mathrm{c}}$ of 40.4 mA/c$\mathrm{m}^{2},\mathrm{V}_{\mathrm{o}\mathrm{c}}$ of 0. 72V, FF of 79.7 %, and PCE of 22.4 %. We also investigated the quantum efficiency (QE) of the proposed PSCs. Combination of this computational and simulation analysis of non-toxic Rb2SnI6 double perovskite (DP) reveals that it is advantageous for potential SC applications.
A Logistic Regression Model for Hate Speech Recognition

: People feel entitled to express their opinions on social media, and many of these opinions may be hostile to others. Hate speech recognition is essential in today's world, where it is important to keep track of what is posted in public for all to see. This paper discusses ways to detect hateful language on any topic using data mining, natural language processing, and machine learning techniques on the social media site Twitter. A Logistic Regression Model for Hate Speech Recognition is proposed. The research conducted provides details of all the hate commenters as well as an overview of the topics on which the hate is being projected the most.
Continuity of percolation probability in ∞ + 1 dimensions

We consider percolation on the graph of the product of a regular tree T with degree d and the line ℤ, in which each tree edge is open with probability 1 – exp(–JTß) and each line edge is open with probability . Let C(o, 0) be the open cluster for . Denote by θ (β) the percolation probability. Here we show that θ (β) is continuous when ß > ßc , where ßc = sup{ß : θ(β) = 0}.
A Wideband Co-Linearly Polarized Full-Duplex Antenna-in-Package With High Isolation for Integrated Sensing and Communication

In this letter, a novel co-linearly polarized full-duplex antenna-in-package (AiP) with high Tx/Rx isolation and wide decoupled bandwidth is proposed for integrated sensing and communication (ISAC). Fan-out wafer-level packaging technology is employed, and the preparation process is discussed in details. To improve Tx/Rx isolation, the current direction of the patch elements is orthogonal to that of the feeding ports. Two identical 1 × 2 patch antenna arrays are used as Tx and Rx antennas, respectively. To further suppress mutual coupling, a decoupling loop is proposed to enhance Tx/Rx isolation. In addition, a wideband full-duplex AiP with high isolation and wide decoupled bandwidth is also proposed by using the parasitic technique and the proposed decoupling method. Prototypes are fabricated and measured to verify the proposed AiPs. The measurement results demonstrate that the proposed AiP possesses the merits of high Tx/Rx isolation (up to 53 dB), wide isolation bandwidth (up to 9.2%) and low cost, providing a foundation for chip-level applications in ISAC.
The effect of quercetin on bone healing in an experimental rat model

Objectives This study aims to evaluate the effect of quercetin on fracture healing in an open fracture model in rats. Materials and methods A total of 80 Wistar-Albino male rats were used in this study. The rats were divided into 10 groups. Daily oral treatment of 100 mg/kg of quercetin dissolved in corn oil were given to four groups, whereas the other four group of control rats were treated with corn oil only. Histopathological and radiological examinations of fracture healing were performed at the end of Weeks 2 and 4 in these rats, while biomechanical and biochemical examinations were performed at the end of Weeks 4 and 6, since harder callus was required. Among the rats in the last two group that were not subjected to the open fracture model, one group was given only quercetin for three weeks and the other for six weeks, and the biochemical markers in the blood were compared between these two groups. Computed tomography images were taken for radiological evaluation. The modified Lane and Sandhu scoring system was used for histological evaluation. The 3-point bending test was performed for biomechanical evaluation. For biochemical evaluation, plasma alkaline phosphatase (ALP), acid phosphatase (AP), total antioxidant status (TAS) and total oxidant status (TOS) levels were measured. Results Radiologically, there was no significant difference between the early-stage results of quercetin and control groups (p=0.247), while quercetin caused a significant increase in callus tissue in terms of latestage results (p=0.012). Histopathologically, there was no significant difference in the early stage (p=0.584); however, in the late stage, a borderline significant increase was observed in the quercetin group compared to the control group (p=0.091). Biomechanical analysis showed that quercetin significantly increased the fracture strength in the healing bone both in the early period (p=0.036) and in the late period (p=0.027). Among biochemical markers, TOS and AP were found to be significantly decreased in the quercetin group. In the non-operated and quercetin given groups, TAS levels was significantly higher (p=0.001) and AP levels were borderline significantly lower at the end of Week 6 (p=0.063). Conclusion Quercetin did not have a significant effect on bone healing in the early period, but significantly promoted bone healing in the late period in rats. We recommend the use of quercetin, a strong antioxidant, in cases with high oxidative stress and conditions such as diabetes, smoking, and malnutrition which may inhibit fracture union, although further clinical studies are needed to confirm these findings.
Qualitative distance and direction reasoning in geographic space

This thesis is inspired by the need to build a reasoning mechanism that deals with qualitative distances and directions, such as the approximate distances and the cardinal directions (e.g., near, North). Spatial reasoning has been recognized as an important capability for the knowledge-based Geographic Information Systems (GISs). While humans do it constantly in our lives, the formalization of such reasoning behavior in computers is still incomplete. Although a number of researchers have built computational models that deal with the reasoning about spatial relations in geographic space, only few have investigated the combination of distances and directions. The major obstacle for the qualitative distance and direction reasoning is that qualitative distances are context-dependent, therefore, the composition operator of such locational relations may depend on the geometric definitions of qualitative distances. This thesis builds models for qualitative distances and directions with two criteria: complete coverage and mutual exclusiveness. These models serve as the basis for the design of reasoning model, whose basic methods are (1) the transformation between qualitative and quantitative locational relations and (2) the well-developed quantitative reasoning methods. Qualitative composition can then be defined via the simulation of quantitative locational relations. Three reasoning models--the all-answer model, the likely-answer model, and the single-answer model--are introduced to assess the qualitative compositions. To evaluate the reasoning models, data based on (1) the number of qualitative distances, (2) the number of qualitative directions, and (3) the geometric patterns of distance intervals are simulated and tested. The results indicate that the compositions of qualitative distances and directions are primarily robust and only few compositions are affected by the interval patterns of qualitative distances. It is hence possible to build a reasoning mechanism based on inference rules instead of analytical calculations. The assessments of compositions show that careful selections of answers for each composition can increase the efficiency of reasoning while maintaining a satisfactory approximation. It is also found that the proposed reasoning models can provide reasonable guesses for the requested relations.
Robot vision system for 3D reconstruction in low texture environment

To realize the obstacle avoidance and automatic navigation of a robot in a low texture environment,an active stereo visual system consisting a binocular camera and a compact laser projector was established.The dense stereo matching algorithm was investigated.Firstly,the compact laser projector generated the spot patterns with excellent uniqueness and anti-noise performance for increasing the texture information.Then,an adaptive-window matching algorithm was proposed based on Integral Grayscale Variance(IGSV)and Integral Gradient Variance(IGV). The algorithm was used calculate the integral variance in a matching window using the integral image obtained by the left image.If it was greater than the variance threshold,the correlation between the left and right image pixelswas calculated to get the dense disparity maps.Experimental results show that the vision system accurately gets the 3Ddense scene around the robot and the 3D reconstruction accuracy is 0.16 mm,which is suitable for the obstacle avoidance and automatic navigation.As compared with the traditional methods,the computation cost of dense matching has at least decreased by 93%since the computation used for image variance could not increase with the size of the matching window.
Exploring the Medicinal Importance of Kantakari: A Review

The use of therapeutic herbs for healing is as old as humanity itself. There is substantial proof that man and his hunt for natural remedies have a long history, including written records, surviving monuments, and even the first plant medicines. The knowledge of using medicinal plants came about as a result of man's long-standing battles with disease, which taught him to look for pharmaceuticals in the barks, seeds, fruit bodies, and other parts of plants. Modern pharmacology includes various plant-based medications that have been used for centuries and were known to ancient cultures. Modern science has recognized their active effect. Kantakari, also known as Yellow Berried Nightshade, is a medicinal plant that is mostly found in India's arid areas. This plant, which is a member of the Solanaceae family, has a range of pharmacological and phytochemical traits. Studies and research conducted over the years have revealed that the plant's medicinal benefit includes anti-inflammatory, bronchodilator, anti-microbial, wound-healing, anti-cancer, and insecticidal properties. The review that follows provides a critical analysis of the existing literature while integrating details on Kantakari, including a mention of its botanical description, chemical composition, and Ayurvedic medicine applications.
Stargazer: Long-Term and Multiregional Measurement of Timing/ Geolocation-Based Cloaking

Malicious hosts have come to play a significant and varied role in today’s cyber attacks. Some of these hosts are equipped with a technique called cloaking, which discriminates between access from potential victims and others and then returns malicious content only to potential victims. This is a serious threat because it can evade detection by security vendors and researchers and cause serious damage. As such, cloaking is being extensively investigated, especially for phishing sites. We are currently engaged in a long-term cloaking study of a broader range of threats. In the present study, we implemented Stargazer, which actively monitors malicious hosts and detects geographic and temporal cloaking, and collected 30,359,410 observations between November 2019 and February 2022 for 18,397 targets from 13 sites where our sensors are installed. Our analysis confirmed that cloaking techniques are widely abused, i.e., not only in the context of specific threats such as phishing. This includes geographic and time-based cloaking, which is difficult to detect with single-site or one-shot observations. Furthermore, we found that malicious hosts that perform cloaking include those that survive for relatively long periods of time, and those whose contents are not present in VirusTotal. This suggests that it is not easy to observe and analyze the cloaking malicious hosts with existing technologies. The results of this study have deepened our understanding of various types of cloaking, including geographic and temporal ones, and will help in the development of future cloaking detection methods.
ANALYSIS OF ECHOCARDIOGRAPHY IMAGES USING MANIFOLD LEARNING

Dimensionality reduction is an important task in machine learning, to simplify data mining, image processing, classification and visualization of high-dimensional data by mitigating undesired properties of high-dimensional spaces. Manifold learning is a relatively new approach to nonlinear dimensionality reduction. Algorithms for manifold learning are based on the intuition that the dimensionality of many data sets may be artificially high and each data point can be described as a function of only a few underlying parameters. Using this tool, intrinsic parameters of the system database, which are main distinction factors of data sets, are recognized and all of them lie on a manifold that shows the real relationship of parameters. One of the successful applications of these methods is in image analysis field. By this approach, each image is a data in high dimensional space that the pixels are its dimensions. Because echocardiography images obtained from a patient are different in quantitative parameters such as heartbeat periodic motion and noise, image sets are reduced to two-dimensional space by a proper manifold learning. In this article, after mapping echocardiography images in two-dimensional space, by using LLE and Isomap algorithms, similar images placed side by side and the relationships between the images according to the cyclic property of heartbeat became evident. The Results showed the weakness of Isomap algorithm and power of LLE algorithm in preserving the relation between consecutive frames. De-noising is an important application which extracted from this research.
Utilization of Information Communication Technology on Education and Social Change Of Village Community

Information and Communication Technology (ICT) changes people's lives and becomes a vital development tool, including in rural areas. ICT also provides positive and negative social change for rural communities in terms of social welfare, social and cultural ties. The purpose of this study was to get an overview of the use of ICT for social changes that occur in the community in Sungai Sirah village, Padang Pariaman Regency. The method used is a qualitative approach. The results of the study found that most rural communities already use ICT (cellular phones). Meanwhile, computers/laptops are still used by certain groups, such as village officials, youth organizations, teachers and students. Internet is still very limited in use due to limited access/network, expensive data packages and minimal skills. There are social changes in society, limited to ways of communicating, seeking/disseminating information and making work easier. While e-commerce activities (online buying and selling) that can improve the social welfare of the community do not yet exist. Aspects of individual social ties indicate that the need to communicate drives people to use ICT. However, direct/face-to-face communication is still the main thing. Village communities are also less worried about cultural changes due to the negative impacts of using ICT. Because the norms developed in the village are still firmly held by the community. However, filters and anticipation of the negative impacts of using ICTs must still be prepared, especially in schools
Two supercavitating hydrofoils near a free surface

A two-dimensional, incompressible, irrotational, linearized flow model is employed in this analysis of two supercavitating, flat-plate hydrofoils in the presence of a free surface. The cavities are taken to have finite lengths, and gravity is neglected. The ensuing boundary-value problem is converted, by means of conformal mapping, to a mixed-boundary-value problem for the complex velocity in the upper half-plane. This altered problem is solved by use of the methods of thin-aerofoil theory and the solution involves digital-computer evaluation of a large number of incomplete elliptic integrals of the first and third kinds. Typical results are presented in graphs, and the results of the present work are compared with Yim's (1964) theory for a single supercavitating body near a free surface.
0354 Effect of Lemborexant on Sleep Architecture in Subjects with Comorbid Insomnia and Mild Obstructive Sleep Apnea from a Ph 3 Trial

Many patients with insomnia have co-morbid obstructive sleep apnea (COMISA). Patients with obstructive sleep apnea (OSA) may also have decreased REM-sleep. Lemborexant (LEM) is a dual-orexin-receptor-antagonist approved to treat adults with insomnia. LEM has been demonstrated to increase total sleep, with prominent increases in rapid eye movement (REM). Thus, sleep architecture was analyzed in subjects with insomnia/mild OSA receiving LEM in a phase 3 trial. Study 304 (E2006-G000-304; NCT02783729) was a 1-month, randomized, double-blind, placebo (PBO)-controlled and active-comparator study in adults ≥55y with insomnia disorder. Subjects received PBO, LEM 5mg (LEM5), LEM 10mg (LEM10) or zolpidem tartrate extended-release 6.25mg (ZOL). Least-squares-mean (LSM) duration of each sleep stage (minutes) was compared across treatment groups from pooled data on Nights (NT)1/2 and NT29/30 for ­subjects with mild OSA (apnea hypopnea index ≥5 to < 15). Treatment-emergent adverse events (TEAEs) were recorded. The analysis set comprised 409 subjects (LEM5=114/LEM10=105/ZOL=112/PBO=78) with mild OSA. Mean (SD) change from baseline (CFB) in total sleep time was significantly larger (more sleep) in both LEM groups than ZOL or PBO at the post-randomization assessments. CFB for REM sleep was also significantly larger (P< 0.0001) for both LEM vs ZOL/PBO at both assessments, NT1/2: LEM5 21.08 (21.79), LEM10 32.57 (24.34), ZOL 3.06 (23.51), PBO 2.42 (17.51); NT29/20: LEM5 14.49 (18.12), LEM10 24.26 (24.50), ZOL 0.75 (22.32), PBO 2.14 (22.62). Compared with PBO, CFB for total nonREM sleep significantly increased (P< 0.0001) in the LEM groups at both assessments, NT1/2: LEM5 39.64 (34.30), LEM10 44.63 (37.85), ZOL 45.80 (37.43); PBO 7.80 (37.88); NT29/30: LEM5 44.66 (37.77), LEM10 44.08 (39.68), ZOL 36.22 (41.95), PBO 15.33 (36.52). Compared to ZOL, total nonREM sleep in either LEM group was not significantly different on NT1/2, and only LEM5 was significantly different vs ZOL at NT29/30 (P< 0.05). LEM was well-tolerated; most TEAEs were mild/moderate. LEM significantly increased total sleep time in subjects with insomnia and mild OSA. The additional sleep was comprised importantly with REM sleep, a sleep stage that may be decreased in patients with OSA. These data support the use of LEM in a population with COMISA. Eisai Inc.
Research on Low-velocity Impact Response of Laminated Composite Plate with Multiple Delaminations

Numerical approach to the impact response of laminated composite thin plate with multiple delaminations under the low-velocity is proposed. Based on the stacked shell elements, a new technique is used to study the laminated thin plate with arbitrary number and oriented plies. The stacked shells are tied by the constrain conditions to ensure structural integrity. Arbitrary number and size of delaminations at any location of the laminate plate can be represented. Moreover, in order to prevent the interpenetration of delaminated surface, contact constraint conditions must be imposed. To satisfy the tied and contact constraint conditions, a new accurate and adequate method is derived for the stacked shells. Based on the proposed approaches, we have developed a program and used it to do numerical simulation of response process of long-fiber reinforced carbon/epoxy composite laminate plate under low velocity impact. A good agreement between the numerical results and the corresponding test data is obtained.