Miracle-dz/UniFAR-FTUs huggingface dataset:
Modified Log Periodic Spiral Antenna for Multi-Band RF Energy Harvesting Applications

In this paper, a modified log spiral antenna for multi-band application with co-axial feed mechanism is proposed. Two optimized Slots Ring Resonators (SRR) have been added around the log spiral antenna to expand bandwidth at low frequencies without increasing its initial size. The proposed antenna operates in the frequency range of 0.7 GHz-1GHz/1.1GHz-1.4GHz/1.5GHz-3GHz. The proposed antenna shows omnidirectional pattern in elevation plane and dipole type radiation pattern characteristics in azimuthal plane. Gain of the proposed antenna lies between 3.5 dBi–5.1 dBi. The Antenna is fabricated on FR4-epoxy substrate of dimension 116 × 116 × 1.6 mm3. Simulation and analysis of the proposed structure has been carried out by using HFSS EM simulation software. Simulation results have been confirmed in measurement. The presented structure can be utilized for RF energy Harvesting for GSM-900 (921 to 960 MHz), GSM-1800 (1805 to 1880 MHz), UMTS (2110 to 2170 MHz) and Wi-Fi (2400 to 2480 MHz).
Quantum many-body scars from magnon condensation

We study the eigenstate properties of a nonintegrable spin chain that was recently realized experimentally in a Rydberg-atom quantum simulator. In the experiment, long-lived coherent many-body oscillations were observed only when the system was initialized in a particular product state. This pronounced coherence has been attributed to the presence of special "scarred" eigenstates with nearly equally-spaced energies and putative nonergodic properties despite their finite energy density. In this paper we uncover a surprising connection between these scarred eigenstates and low-lying quasiparticle excitations of the spin chain. In particular, we show that these eigenstates can be accurately captured by a set of variational states containing a macroscopic number of magnons with momentum $\pi$. This leads to an interpretation of the scarred eigenstates as finite-energy-density condensates of weakly interacting $\pi$-magnons. One natural consequence of this interpretation is that the scarred eigenstates possess long-range order in both space and time, providing a rare example of the spontaneous breaking of continuous time-translation symmetry. We verify numerically the presence of this space-time crystalline order and explain how it is consistent with established no-go theorems precluding its existence in ground states and at thermal equilibrium.
Dual‐band frequency‐reconfigurable MIMO PIFA for LTE applications in mobile hand‐held devices

In this study, dual-port dual-frequency tuneable MIMO planar inverted-F antenna (PIFA) is presented for mobile handheld device applications. The proposed MIMO antenna consists of two symmetrical PIFAs with the centre-to-centre distance of 43.0 mm (0.1906λ 0 ). The dual-band tunability is achieved by changing the capacitance (V 1 and V 2 ) of 4.15 pF (0 V)-0.72 pF (15 V). The impedance bandwidth of -6 dB is realised from 0.8 to 0.98 GHz for the lower band and 1.65 to 2.2 GHz for the higher band. The proposed antenna provides the independent frequency tunability without disturbing the frequency bands. It shows the good isolation for both the tuneable bands >20 dB without using any coupling element between the antenna structure. It has a peak realised gain of 3.44 dBi, good efficiency of > 75% and envelope correlation coefficient of 0.007. In addition, the proposed PIFA performance is analysed with total active reflection coefficient, channel capacity, diversity gain, multiplexing efficiency, mean effective gain and specific absorption ratio for the tuneable range of frequencies. The good agreement is obtained between simulation and experimental performances to validate the antenna parameters.
Effects of low-molecular weight alcohols on bacterial viability

Abstract Alcohol based solutions are among the most convenient and wide spread aid in the prevention of nosocomial infections. The current study followed the efficacy of several types and isomers of alcohols on different bacterial species. Seven alcohols (ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, tert-butyl alcohol, and ethylene glycol) were used to evaluate their minimal inhibitory and bactericidal effects by microdilution method on bacteria that express many phenotypical characteristics: different cell-wall structure (Gram positive/negative bacteria), capsule production (Klebsiella pneumoniae), antibiotic resistance (MRSA vs MSSA) or high environmental adaptability (Pseudomonas aeruginosa). Results: The best inhibitory effect was noticed for n-propyl, followed by iso-propyl, n-butyl, and iso-butyl alcohols with equal values. Ethylene glycol was the most inefficient alcohol on all bacteria. In K. pneumoniae and P. aeruginosa, the bactericidal concentrations were higher than the inhibitory one, and to a level similar to that encountered for most of the Gram-positive bacteria. Among Gram-positive cocci, E. faecalis presented the lowest susceptibility to alcohols. Conclusions: All alcohols presented good effect on bacteria, even in low concentrations. Compared to ethanol as standard, there are better alternatives that can be used as antimicrobials, namely longer-chain alcohols such as propyl or butyric alcohols and their iso- isomers. Ethylene glycol should be avoided, due to its toxicity hazard and low antimicrobial efficacy. Bacterial phenotype (highly adaptable bacteria, biofilm formation) and structure (cell wall structure, presence of capsule) may drastically affect the responsiveness to the antimicrobial activity of alcohols, leading to higher bactericidal than inhibitory concentrations.
“There’s No Place Like Home”: Inquiry into Preferences for Local Foods

Using a nationally representative survey of U.S. consumers, we analyze demographics, food shopping behaviors, and stated preferences and use logistic regressions to further explore local food preferences and perceptions of farmers’ markets. When asked the definition of “local,” the largest percentage of respondents (28%) selected that local meant “in their county of residence. ” Respondents assigned various qualities to farmers’ markets, including freshness, healthiness, tastiness, and locally produced. Having higher income, the presence of a child in the household, reading packaging information, shopping for local food at the supermarket, and closer definitions of local all increased the probability of shopping at the farmers’ market.
Development of Mathematics Collaborative Problem-Solving Skills Scale

Collaborative Problem Solving (CPS) is one of the most critical and necessary skills in education and workplace; hence, its assessment is a necessary subject of research. CPS assessment tools must be crafted to establish the effectiveness of the pedagogies to CPS development. Therefore, to address these gaps, this study developed a Likert scale called Mathematics Collaborative Problem Solving Skills (MaCoPSS) Scale. The scale development followed the process: (1) item generation, (2) item evaluation, (3) try-outs, (4) Exploratory Analysis, (5) final evaluation. Open-ended questionnaires were administered to 273 respondents. After analysis, 551 statements were produced as initial item pool. The items are evaluated and only 59 of them are used for the draft scale for the try-outs. The scale was administered to 648 students for the try-outs and responses were cleaned then subjected to Exploratory Factor Analysis (EFA). Two factors, namely social skills (SS) and problem-solving skills (PSS) were extracted. To establish internal consistency, the factors are correlated to one another (r=0.708), and factor to total raw score (TRS) correlations are highly correlated: SS-TRS (r=0.955) and PSS-TRS (r=0.894). The final scale consists of 27 SS and 17 PSS items. The overall reliability coefficient of the scale is α=0.941. The resulting scale is considered valid and reliable.
Preservation areas x environmental legislation in the Rio das Almas hydrographic basin, Ceres microregion (GO) between 2008/2016

The aim of this research was to analyze the remaining areas of vegetation cover, with emphasis on permanent preservation areas (APPs) and legal reserve areas (RLs), in the Rio das Almas hydrographic region, Microregion of Ceres (GO). In order to analysis and mapping, it was considered two specific periods: 2008 related to the deadline established by the 2012 Forest Code to amnesty deforestation, regions nominated as consolidated rural areas, and 2016, to map and calculate APPs and RLs. The results revealed that deforestation occurred before 2008 and, therefore, possibly the vast majority of the analyzed farms fall under the amnesty provided by Law 12.651 / 2012. There was also a reduction of natural vegetation around 4.0% over the 8-year period.
A PREVIEW OF ACSM'S GUIDELINES FOR EXERCISE TESTING AND PRESCRIPTION, EIGHTH EDITION

T he purpose of this feature article is to provide a brief history of the American College of Sports Medicine’s (ACSM’s) Guidelines for Exercise Testing and Prescription (GETP) and an overview of the content of the eighth edition (8), the newest version of ACSM’s GETP while highlighting its new features. ACSM’s GETP is the most widely circulated set of guidelines for health/fitness and clinical professionals conducting exercise programs and exercise testing in corporate, health care, and health/fitness settings. ACSM’s Health & Fitness Journal is the ideal forum to educate health/ fitness and clinical exercise professionals about the content and new features of ACSM’s GETP, Eighth Edition. We thank Editor-in-Chief Edward T. Howley, Ph.D., FACSM, for this opportunity.
Piezoresistive Behavior of Carbon Nanopaper Polymer Composites for Strain Sensing

Carbon nanopapers made of carbon nanotubes (CNTs) or carbon nanofibers (CNFs), possess unique electrical, thermal and mechanical properties and when integrated with a polymer matrix, can become a multifunctional composite capable of strain sensing and heat actuation. Smart structures such as these can be used in many applications including deployable space structures, human motion detection, and structural health monitoring as flexible, sensitive and stable strain sensors in addition to providing electrical heat actuation for the shape memory effect in polymers. This study focuses on strain sensing capabilities by developing a numerical model to predict piezoresistive behavior. The piezoresistive effect is a change in resistivity of a conductive network when a deformation is applied. This allows strain to be determined by simply measuring the electrical resistance. An equivalent resistor network can be formed to represent the fiber network. The proposed 2D model generates randomly oriented fibers inside a unit cell, determines their intersection points, and creates a mesh of the network for finite element analysis. Electrical conductivity is found for the initial and deformed fiber states by determining the current through the network for a known voltage. A piezoresistivity experimental study is conducted to investigate the strain sensing abilities of this material and validate model results. This simple model provides an initial framework that can be developed in future work. Despite its 2D nature, the model captures the governing mechanisms of piezoresistivity to a certain extent.
Characterizing neuroanatomic heterogeneity in people with and without ADHD based on subcortical brain volumes

Background Attention-Deficit/Hyperactivity Disorder (ADHD) is a prevalent neurodevelopmental disorder in children and adults. Neuroanatomic heterogeneity limits our understanding of the etiology of ADHD. This study aimed to parse neuroanatomic heterogeneity of ADHD, and to determine whether subgroups could be discerned in patients based on subcortical volumes. Methods Using the dataset from the ENIGMA-ADHD Working Group, we applied exploratory factor analysis (EFA) to subcortical volumes of 993 boys with and without ADHD, and to subsamples of 653 adult men, 400 girls, and 447 women. Factor scores derived from the EFA were used to build networks. A community detection (CD) algorithm clustered participants into subgroups based on the networks. Results Three factors (basal ganglia, limbic system, and thalamus) were found in boys and men with and without ADHD. The factor structures for girls and women differed from those in males. Given sample size considerations, we concentrated subsequent analyses on males. Male participants could be separated into four communities, though Community 3 was absent in healthy men. Significantly case-control differences of subcortical volumes were observed within communities in boys with increased effect sizes, but not in men. While we found no significant differences in ADHD symptom severity between communities in boys or men; affected men in Community 1 and 4 presented comorbidities more frequently than those in other communities. Conclusion Our results indicate that neuroanatomic heterogeneity in subcortical volumes exists, irrespective of ADHD diagnosis. Effect sizes of case-control differences appear more pronounced at least in some of the subgroups.
Upregulated CCL20 and CCR6 in Cancer Stem Cells Converted from Mouse iPS Cells

Background: Cancer stem cells (CSCs) as a class of malignant cancer cells play an important role in tumor progression. Previous studies by our group have demonstrated the establishment of the model of CSCs converting mouse iPS cells (miPSCs) into CSCs by treating the miPSCs with a conditioned medium (CM) of Lewis Lung Carcinoma (LLC) cells with or without the nonmutagenic chemical compounds. CSCs converted from miPSCs developed highly malignant adenocarcinoma when subcutaneously transplanted into the nude mice. Methods: The miPSCs were treated with each compound for 1 week in the presence of a CM of LLC cells. We evaluated the gene expression in the resultant CSCs comparing that in miPSCs by microarray analysis. And the expression of chemokine (C-C motif) ligand 20 (CCL20) and C-C chemokine receptor type 6 (CCR6) in converted cells were evaluated by rt-qPCR. The CCR6 expression in converted cells and primary cells were determined by flow cytometry. Results: As the result, the expression of CCL20 was found upregulated in the presence of CM supplemented with PD0325901. Then we assessed the expression of CCR6, which was considered to be stimulated by CCL20. Then the expression of CCR6 was also found up-regulated. Interestingly, IL17A expression was also observed only in the CSCs from the primary tumor implying the effect of tumor microenvironment. Moreover, significantly high level of CCR6 was showed in flow cytometric analysis. Conclusion: These results suggest that a model of CSCs with CCL20-CCR6 autocrine loop was obtained as the result of the conversion of iPSCs. This CSC should be a good model to study targeting CCR6 as a G protein-coupled receptor (GPCR).
Incremental Throughput Allocation of Heterogeneous Storage With No Disruptions in Dynamic Setting

Solid-state drives (SSDs) have been added into storage systems for improving their performance, which will bring the heterogeneity into the storage medium. The throughput is one of the essential resources in heterogeneous storage systems, and how to allocate the throughput plays a crucial role in user performance. There are many types of research on the throughput allocation of heterogeneous storage systems. However, the throughput allocation of heterogeneous storage is facing new challenges in a dynamic setting, where users are not present in the system simultaneously, and enter the system dynamically. Drawing on economic game-theory, researchers have proposed many methods to tackle dynamic throughput allocation issues for heterogeneous storages, cross out enjoying Sharing Incentive (SI), Envy Freeness (EF), and Pareto Optimality (PO). However, they either relax constraints of fairness property to cause the allocation with weak fairness or interrupt some users present in the system to give up a piece of their allocations for new users entering the system, which will degrade these donors’ performance. Moreover, all of existing methods will cause lower resource utilization due to constraints of users’ dominant share equality. In this article, we propose a dynamic throughout allocation method based on gradual increase (DAGI), which can adapt to various workloads to make a fair allocation with a maximum resource utilization. Without relaxing constraints of fairness properties, when new users enter the system, DAGI can make a dynamic allocation with strong fairness by appropriately postponing the allocation of surplus throughputs, so this can provide an opportunity that DAGI can guarantee the final allocation with strong fairness when allocating remaining throughputs after all users are present in the system. Meanwhile, DAGI can gradually increase user allocation without reduction, which will not interrupt any users present in the system. Furthermore, DAGI can conduct a dynamic throughput allocation based on users’ local bottleneck resources, which can adapt to various workloads of users to improve resource utilization. Extensive experiments are conducted to prove the effectiveness of DAGI. The experimental results show that DAGI can achieve higher resource utilization and performance than existing methods, and can satisfy desirable game-theoretic properties with guaranteeing the strong fairness. In addition, DAGI gradually increases the allocation of each user without interrupting any user to reduce its allocation to degrade its performance.
Influence of corporate social responsibility on intangible benefits in the project-based companies

—In this study, the influence of three factors of Corporate Social Responsibility (CSR), Ecological aspect, Voluntarism, and Social aspect on soft results, that is, on Intangible project benefits in project-based companies in Serbia has been examined. For this purpose, the conceptual model with three hypotheses was developed. For hypothesis testing the Structural Equation Modeling (SEM) was used. The tested sample comprised of 184 respondents from different business sectors. The results of empirical study confirm the hypothesis and point out the existence of positive correlations between model constructs. However, only two hypotheses (H1 and H3), that impose the positive influence of constructs Ecological aspect and Social aspect towards Intangible project benefits have statistical significance and acceptable. The hypothesis H2, that imposes the positive influence of construct Voluntarism on Intangible project benefits, although is being confirmed, is not statistically significant. Obtained results are suitable for comparisons with other researchers conducted in transitional economies as well as in developed economies.
El Criogénico terminal, el Ediacárico y el Cámbrico temprano en la Plataforma Siberiana sudoccidental: estratotipos y limitotipos

A stratigraphic revision of the latest Cryogenian, Ediacaran and earliest Cambrian of the southwestern Siberian Platform is proposed here. All late Neoproterozoic stratigraphic units fill the Sayan foredeep. The sedimentary record is adscribed to the upper Cryogenian and Ediacaran Oselok Group and the lower Cambrian Ust’-Tagul Formation. They can be subdivided into members with a characteristic fossiliferous content ecology of Dickinsonia.
Doppler-Resilient 802.11ad-Based Ultrashort Range Automotive Joint Radar-Communications System

We present an ultrashort range IEEE 802.11ad-based automotive joint radar-communications (JRC) framework, wherein we improve the radar's Doppler resilience by incorporating Prouhet–Thue–Morse sequences in the preamble. The proposed processing reveals detailed microfeatures of common automotive objects verified through extended scattering center models of animated pedestrian, bicycle, and car targets. Numerical experiments demonstrate 2.5% reduction in the probability of false alarm at low signal-to-noise-ratios and improvement in the peak-to-sidelobe level dynamic range up to Doppler velocities of $\pm 144$ km/h over conventional 802.11ad JRC.
Bacterial composition of sponges, sediment and seawater in enclosed and open marine lakes in Ha Long Bay Vietnam

ABSTRACT Marine lakes are landlocked bodies of seawater, isolated to varying degrees from the surrounding marine habitat. Isolated lakes generally have lower pH values, salinities and higher temperatures than more open lakes. We used a 16S rRNA gene barcoded pyrosequencing approach to study the bacterial communities of two sponge species, sediment and seawater in one enclosed and two open marine lakes. Bacterial communities of the sponge Spheciospongia solida mainly consisted of Proteobacteria, Cyanobacteria and Bacteroidetes. In contrast, Proteobacteria, Chloroflexi and Acidobacteria dominated the bacterial communities of the sponge Spongia ceylonensis. Although only a limited amount of samples were collected, both water and S. ceylonensis sponge had higher relative abundances of Cyanobacteria in the enclosed lake, which mainly consisted of OTUs assigned to the genus Synechococcus. This is in line with a number of previous studies, which have shown that environmental conditions found within low pH environments such as marine lakes benefit the growth of Synechococcus spp. Future studies should address the mechanism by which Synechococcus spp. may help host sponges and their bacterial communities adapt to low pH conditions in isolated marine lakes and other low-pH environments.
Correcting the January optimism effect

textabstractEach month, various professional forecasters give forecasts for next year's real gross domestic product (GDP) growth and unemployment. January is a special month, when the forecast horizon moves to the following calendar year. Instead of deleting the January data when analyzing forecast updates, I propose a periodic version of a test regression for weak-form efficiency. An application of this periodic model for many forecasts across a range of countries shows that in January GDP forecast updates are positive, whereas the forecast updates for unemployment are negative. I document that this January optimism about the new calendar year is detrimental to forecast accuracy. To empirically analyze Okun's law, I also propose a periodic test regression, and its application provides more support for this law.
Community pharmacists: members or bystanders of the primary care multidisciplinary team?

This study investigated who community pharmacists (CPs), general practitioners (GPs) and practice nurses (PNs) included in their multidisciplinary team (MDT), whether they felt part of the MDT, barriers and facilitators to multidisciplinary working and whether the extent of the CPs’ clinical role influenced being part of a MDT.
Distribution of rare earth elements in core sediments of Kolakkudi Lake, Southern India

The lake Kolakkudi represents a small, isolated and fresh water lake situated in southern part of TamilNadu, India and it surrounded by fluvial placer deposits of garnet rich sands. In the study area to obtain information about rare earth elements (REEs) of core sediments and conceded sediment composition and distribution of rare earth elements as well as surrounding soil was investigated. The concentration of REEs in core sediments varies from 0.42 to 49.1 ppm. The higher REE content in the core sediments samples from various locations whichsignificance the plethora of clay and/or quartz with less significant effect caused by sedimentary sorting. According to the difference in the levelsof the rare earth elements, the rare earth elements normalized patterns and associated fractionation parameters (SLREE/SHREE, (La/Yb)N, and (NdYb) N) showed similarities between the lake sediments and the surrounding clays, confirming a widespread influence of nearby local lithology on the lake sediment composition. On the other hand, the results of the statistical analysis suggest the contribution of both clay rich soils and garnet rich sands in the lake sediments to the total content of rare earth elements. ARTICLE INFO