Miracle-dz/UniFAR-FTUs huggingface dataset:
Unveiling knowledge quality, researcher satisfaction, learning, and loyalty: A model of academic social media success

Purpose Examines how perceived knowledge quality influences researchers' satisfaction with academic social media (ASM) site use, perceived learning from use, and loyalty toward the site. Design/methodology/approach Built upon the theoretical grounding of the information system success framework, it was hypothesized that satisfaction, perceived learning, and loyal behavior toward an ASM site are all functions of the perceived quality of knowledge obtained. Data were collected by online survey from 348 researchers registered on ResearchGate and subjected to SmartPLS structural equation modeling, bootstrapping, and blindfolding. Findings The hypothesized relationships were supported. Perceived knowledge quality significantly influences researchers' satisfaction with ASM site use, and satisfaction affects perceived learning and researchers' loyalty with the ASM site. Research limitations/implications Identification of the relationship between perceived knowledge quality and ASM site success extends the study of ASM sites from description of usage patterns to understanding the effect of content quality on important outcomes of use. Practical implications ASM sites rely on the quality of knowledge contributed by their members for satisfaction, loyalty, and perceptions of value. The ongoing success of an ASM requires directed attention to quality knowledge provision. Originality/value This paper contributes a simplified DeLone & McLean information system success framework for studies of content quality. It also provides fresh insights into ASM site usage through a focus on the role of perceived knowledge quality in forming satisfaction, learning, and loyalty.
ECONOMICAL VERSUS ECOLOGICAL DEVELOPMENT: A CASE STUDY OF WHITE STORKS IN A CATTLE FARM

Aims: Wildlife and humans compete for natural resources generating conflicts that sometimes translate into financial loss. In this study, the economical costs of the upkeep of a white stork Ciconia ciconia colony at a cattle farm over a six-year period were evaluated. Furthermore, the effect of ash lopping in nest site selection and the efficacy of nest removal in controlling the population of this species was analysed. Location: The ash dehesa studied was located in the Northern area of the Madrid province, in both Soto del Real and Manzanares el Real localities (40o 44' N, 3o 49' E), from 1999 to 2004. Methods: Estimation was made of the economical cost of white stork colony maintenance by estimating the total weight of branches and bud shoots on the ashes. The tree type (lopped or unlopped) was noted to determine nest site selection where new nests were established in the subsequent year after lopping. Finally, it was recorded if removed nests (by the Regional Government as a method of population control) were less like to rebuilt in function of previous breeding success (failed or not). Results: Storks mainly selected lopped trees as nest sites. To avoid the increase of white stork pairs in the colony, lopping was not carried out in subsequent years, causing economical losses to landowners (a minimum of 13,902.33 ? in six years). In addition, due to the high nest-site fidelity in this species, the total number of nests in the colony was not reduced by nest removal. Nests that contained a pair that failed in their reproductive attempt were less likely to be rebuilt in the consecutive breeding season. The results showed that selective nest removal (removal of nests which failed the previous year) might be a more effective method for population control than nest removal methods used to date. Conclusions: Due to the low total economic cost of colony maintenance, it is proposed that economical compensation by the regional government to the farm owners will be a more effective management measure than nest removal.
Effects of lead exposure on redox status, DNA and histological structures in Venus verrucosa gills and digestive gland

ABSTRACT Lead (Pb) is one of the most toxic heavy metals that affect the physiological status of aquatic organisms. The present investigation evaluated the possible toxic effect of lead chloride (PbCl2) on biomarkers responses, DNA damage and histological alterations in Venus verrucosa gills and digestive gland. Three concentrations of PbCl2 (D1:1µgL−1, D2: 10µgL−1 and D3: 100µgL−1) were chosen for V. verrucosa exposure during six days. At the end of the trial, it was found that Pb tended to accumulate in both gills and digestive gland in a dose-dependent manner. However, gill tissues exhibited the highest metal burden. Our results showed an increase of malondialdehyde, protein carbonyls and advanced oxidation protein product levels in both organs following PbCl2exposure. The induction of both non-enzymatic and enzymatic antioxidant systems; as well as the decrease of the acetylcholinesterase activity and degradation of DNA structure was recorded in the gills and digestive gland. The histopathological alterations observed in gills (disruption of lamellas and cilia filaments …) and digestive gland (lumens occlusion, necrosis and fibrosis) confirmed the aforementioned results. Our data highlighted the short-term toxicity effects of PbCl2 on V. verrucosa and pointed out a high sensitivity of gills towards this metal.
Evaluation of the Bulk Mass Flux Formulation Using Large-Eddy Simulations

In this study, bulk mass flux formulations for turbulent fluxes are evaluated for shallow and deep convection using large-eddy simulation data. The bulk mass flux approximation neglects two sources of variability: the interobject variability due to differences between the average properties of different cloud objects, and the intraobject variability due to perturbations within each cloud object. Using a simple cloud–environment decomposition, the interobject and intraobject contributions to the heat flux are comparable in magnitude with that from the bulk mass flux approximation, but do not share a similar vertical distribution, and so cannot be parameterized with a rescaling method. A downgradient assumption is also not appropriate to parameterize the neglected flux contributions because a nonnegligible part is associated with nonlocal buoyant structures. A spectral analysis further suggests the presence of fine structures within the clouds. These points motivate investigations in which the vertical transports are decomposed based on the distribution of vertical velocity. As a result, a “core-cloak” conceptual model is proposed to improve the representation of total vertical fluxes, composed of a strong and a weak draft for both the updrafts and downdrafts. It is shown that the core-cloak representation can well capture the magnitude and vertical distribution of heat and moisture fluxes for both shallow and deep convection.
Can Pulsed Radiofrequency of the Occipital Nerves Cause Sedation? A New Perspective of Existing Knowledge

Background Pulsed radiofrequency stimulation (PRF) of the greater and lesser occipital nerves (GON and LON) has neuromodulative and analgesic properties. Objectives The aim of this study was to investigate whether the PRF of the occipital nerves can cause sedation. Methods This is an observational case series study in Pain Management Unit of Attikon University Hospital. Patients suffering from primary headaches were scheduled for PRF of occipital nerves following a standardized protocol. The Bispectral Index device was applied and recorded every minute throughout the procedure. Results 22 patients were studied. BIS values were lowered in all but three patients during GON stimulation, and in all patients during LON stimulation. Values of decline compared to baseline ranged between 0 - 23 (median 8.5) for GON and 1 - 27 (median 14) for LON, with LON decline being significantly lower. Conclusions PRF at the occipital nerves led to mild sedation in all patients. Further studies are required to investigate this effect and clarify the exact mode of action of pulsed radiofrequency.
Explorations in automated language classification

An earlier paper, to which some authors of the present paper have contributed (Brown et al. 2008), describes a method for automating language classification based on the 100-item referent list of Swadesh (1955). Here we discuss a refinement of the method, involving calculation of relative stabilities of list items and reduction of the list to a shorter one by eliminating least stable items. The result is a 40-item referent list. The method for determining stabilities is explained, as well as a method for comparing the classificatory performance of different-sized reduced lists with that of the full 100-item list. A statistical investigation of the relationship of lexical similarity of languages to their geographical proximity is presented. Finally, we test the possibility that information involving typological features of languages can be combined with lexical data to enhance classificatory accuracy.
Functional studies of the coronavirus nonstructural proteins

Coronaviruses, including SARS-CoV, SARS-CoV-2, and MERS-CoV, have caused contagious and fatal respiratory diseases in humans worldwide. Notably, the coronavirus disease 19 (COVID-19) caused by SARS-CoV-2 spread rapidly in early 2020 and became a global pandemic. The nonstructural proteins of coronaviruses are critical components of the viral replication machinery. They function in viral RNA transcription and replication, as well as counteracting the host innate immunity. Studies of these proteins not only revealed their essential role during viral infection but also help the design of novel drugs targeting the viral replication and immune evasion machinery. In this review, we summarize the functional studies of each nonstructural proteins and compare the similarities and differences between nonstructural proteins from different coronaviruses.
CD40 Signaling in B Cells Regulates the Expression of the Pim-1 Kinase Via the NF-κB Pathway1

The ability of CD40 signaling to regulate B cell growth, survival, differentiation, and Ig class switching involves many changes in gene expression. Using cDNA expression arrays and Northern blotting, we found that CD40 signaling increased the mRNA levels for pim-1, a protooncogene that encodes a serine/threonine protein kinase. Subsequent experiments showed that CD40 engagement also increased both Pim-1 protein levels and Pim-1 kinase activity in B cells. We then investigated the signaling pathways by which CD40 regulates Pim-1 expression and found that CD40 up-regulates Pim-1 primarily via the activation of NF-κB. Inhibiting the activation of NF-κB, either by treating cells with a chemical inhibitor, BAY11-7082, or by inducibly expressing a superrepressor form of IκBα, significantly impaired the ability of CD40 to increase Pim-1 protein levels. Because Pim-1 expression is associated with cell proliferation and survival, we asked whether this correlated with the ability of CD40 signaling to prevent anti-IgM-induced growth arrest in the WEHI-231 murine B cell line, a model for Ag-induced clonal deletion. We found that the anti-IgM-induced growth arrest in WEHI-231 cells correlated with a substantial decrease in Pim-1 levels. In contrast, culturing WEHI-231 cells with either anti-CD40 Abs or with the B cell mitogen LPS, both of which prevent the anti-IgM-induced growth arrest, also prevented the rapid decline in Pim-1 levels. This suggests that Pim-1 could regulate the survival and proliferation of B cells.
The complete chloroplast genome of ornamental liana Sarcodum scandens (Fabaceae)

Abstract Sarcodum scandens is a tropical ornamental liana, distributed in southeastern Asia. The complete chloroplast genome was sequenced using the Illumina Hiseq X-Ten platform. The genome lacks an inverted repeat (IR) region, containing 76 protein-coding genes, 30 tRNAs genes and 4 rRNAs. The overall GC content is 34.1%. A phylogenetic tree based on the whole chloroplast genomes of 14 species indicated that S. scandens belonged to a monophyletic tribe Wisterieae, which was sister to Glycyrrhiza and nested in IRLC group of the subfamily Papilionoideae (Leguminosae).
Abrasive Wear Mechanism of Microwave-Assisted Compression Molded Kenaf/HDPE Composite

The present work aims to study the abrasive wear of kenaf/high-density polyethylene (HDPE) composites with 20% weight fraction reinforcement of the kenaf fiber. A unique technique of the microwave-assisted compression molding (MACM) was used to fabricate the composites. The pin-on-disc setup was used for two-body abrasive wear, in which the kenaf/HDPE composite acts as a pin and the abrasive paper (P100) acts as a counter surface. Two-body abrasive wear tests were conducted for HDPE and kenaf/HDPE composites at normal loads of 10 N, 20 N, and 30 N and the sliding speed of 1 m/s, 2 m/s, and 3 m/s within 100 m of sliding distance. Tribofilm formation was observed at higher values of load and speed, which helps in reducing the wear-rate of the composites. Wear mechanism of the kenaf/HDPE composite is discussed in detail and supported with scanning electron microscope (SEM) fractography.
Enhanced Pool Boiling Performance of Microchannel Patterned Surface with Extremely Low Wall Superheat through Capillary Feeding of Liquid

ABSTRACT The pool boiling performance plays a key role in the development of high heat flux dissipating applications. The high critical heat flux and low wall superheat are two of the critical factors that affect the long-term life of devices. In this paper, enhanced pool boiling performance can be achieved by well-designed microchannels in copper surfaces using a precision diamond dicing method. The microchannel patterned surface with the channel length of 0.4 mm obtains a critical heat flux of 169.8 W/cm2, which has a 193% enhancement compared to the plain surface. Besides, the extremely low wall superheat of 3 K has been achieved, and thus the heat transfer coefficient reaches 51.8 W/cm2·K, about 738% larger than that of the plain surface. Herein, the microcavity has increased the nucleation site, the surface can promote the bubbles escape, and then the channel can continuously supply the liquid. Hence, the extremely low wall superheat at high heat flux occurs due to the rapid bubble departure and enhanced capillary feeding of liquid replenishment to active nucleation sites on the surface. The above results provide an effective way for the realization of high-performance two-phase microchannel patterned heat sinks via optimizing the microstructure geometry.
Metal and Metal Oxide Electrocatalysts for Redox Flow Batteries

Redox flow batteries (RFBs) are one of the promising technologies for large‐scale energy storage applications. For practical implementation of RFBs, it is of great interest to improve their efficiency and reduce their cost. One of the key components of RFBs that can greatly influence the efficiency and final cost is the electrode. The chemical and structural nature of electrodes can modify the kinetics of redox reactions and the accessibility of the electroactive species to available active sites. The ideal electrocatalyst for RFBs must have good activity for the desirable redox reaction, provide a high surface area, and exhibit sufficient conductivity and durability over repeated use. One strategy is to coat the electrode with metal and metal oxide electrocatalysts. Metal electrocatalysts have the advantage of high conductivity, while metal oxide catalysts are usually less expensive and so more economically attractive. In order to gain a better understanding of the performance of the electrocatalysts in RFBs, a comprehensive review of the progress in the development of metal and metal oxide electrocatalysts for RFBs is provided and a critical comparison of the latest developments is presented. Finally, practical recommendations for advancement of electrocatalysts and effective transfer of knowledge in this field are provided.
Content, Structure, and Delivery Characteristics of Yoga Interventions for Managing Hypertension: A Systematic Review Protocol

Aims: This systematic review aims to summarize the content, structure, and delivery characteristics of yoga interventions used for managing hypertension. Introduction: Globally, hypertension-related morbidity and mortality are high. Yoga might be a potential solution for managing hypertension. Several systematic reviews have evaluated the effectiveness of yoga interventions for managing hypertension. There is a need to summarize the content, structure, and delivery characteristics of yoga interventions used for managing hypertension. Inclusion Criteria: Randomized controlled trials assessing the effectiveness of yoga interventions for managing hypertension in adults and reporting either the content, structure, or delivery characteristics will be included in this systematic review. Methods: The Joanna Briggs Institute systematic review methodology will be followed to conduct the review. We aim to search for a wide range of sources to find both published and unpublished studies. The following databases will be searched: MEDLINE, Embase, CINAHL, PsycINFO, Allied and Complementary Medicine (AMED), Web of Science, Cochrane Central Register of Controlled Trials (CENTRAL), Turning Research Into Practice (TRIP), AYUSH Research Portal, A Bibliography of Indian Medicine (ABIM), Digital Helpline for Ayurveda Research Articles (DHARA), CAM-QUEST, and Directory of Open Access Journals (DOAJ). The search for unpublished studies will include OpenGrey, EThOS, and ProQuest Dissertations and Theses. Databases will be searched from their inception dates, and no language restrictions will be applied. A narrative description of the findings will be written, structured around the aims of this systematic review. Systematic review registration number: CRD42019139404
Improving the resolution of migrated images by approximating the inverse Hessian using deep learning

We have estimated migrated images with meaningful amplitudes matching least-squares migrated images by approximating the inverse Hessian using generative adversarial networks (GANs) in a conditional setting. We use the CycleGAN framework and extend it to the conditional CycleGAN such that the mapping from the migrated image to the true reflectivity is subjected to a velocity attribute condition. This algorithm is applied after migration and is computationally efficient. It produces results comparable to iterative inversion but at a significantly reduced cost. In numerical experiments with synthetic and field data sets, the adopted method improves image resolution, attenuates noise, reduces migration artifacts, and enhances reflection amplitudes. We train the network with three different data sets and test on three other data sets, which are not a part of training. Tests on validation data sets verify the effectiveness of the approach. In addition, the field-data example also highlights the effect of the bandwidth of the training data and the quality of the velocity model on the quality of the deep neural network output.
Dual-Band Ultrathin Meta-Array for Polarization Conversion in Ku/Ka-Band With Broadband Transmission

Polarization converters play an important role in modern communication systems, but their wide and multiple band operation to facilitate volume and size reduction is quite challenging. In this letter, a dual-band linear polarization (LP) to circular polarization (CP) converter is presented using a novel design procedure based on geometric parameters optimization of a meta-array. For dual-band operation, the concept of mutual interaction of two distinct resonators is used. Step-by-step design procedure is proposed and an example is presented to convert incident x (y) polarization into transmitted left-hand circular polarized (LH-CP) [right-hand circular polarized (RH-CP)] in Ku band (15.15–19.5 GHz) and RHCP (LHCP) in Ka-band (33.1–39.05 GHz). After performing model-based theoretical paradigm analysis, and full-wave simulation and optimization, the converter is fabricated and the measurements are performed with a vector network analyzer. The measured results, close to simulation results, depict the validity and reliability of the design. The proposed meta-array is ultrathin, wideband, and polarization diverse, which is very suitable for wide range of applications including millimeter-wave-communication.
Psychological Capital Protects Social Workers from Burnout and Secondary Traumatic Stress

Summary: To counteract the negative consequences inherent to the emotionally demanding professions like social work, we need to advance the understanding of the resources that preserve the employees’ well-being. This study investigated the role of Psychological Capital (PsyCap) in protecting social workers from developing burnout and Secondary Traumatic Stress (STS). The design of the study builds on the job demands-resources model and the conservation of resources theory. A national sample of 193 Romanian social workers participated in the study. We used the structural equation modeling framework for data analysis. We tested two structural models that had burnout as a mediator for the relationship between PsyCap and STS: A partial mediation model and a total mediation model. Findings: The total mediation model was supported by our data suggesting that PsyCap has a protective role against burnout, and subsequently, STS. Moreover, the results indicate that burnout is the critical link between personal resources and STS. Applications: The results of the study contribute to enhancing the protection of the social workers’ well-being in their professional settings, by advancing the knowledge about the resources that need to be developed in order to prevent or reduce the negative job consequences associated with helping professions. As such, increasing PsyCap levels of employees enhance the sustainability of their working conditions.
Time-Domain Procedures for Lightning-Induced Voltage Calculation in Electromagnetic Transient Simulators

In this paper, two time-domain procedures are proposed for the calculation of lightning-induced voltages using lossy transmission line models available in electromagnetic transient simulators. In both procedures, the influence of the incident electromagnetic field is represented in the form of current sources that are connected externally at the ends of the illuminated line. One of the procedures is formulated directly in the phase-domain and is compatible with the universal line model (ULM). The second procedure is formulated in the modal domain and is compatible with the transmission line model proposed by Marti. Both procedures are validated taking as reference a first order FDTD solution of telegrapher's equations considering the presence of external electromagnetic fields. It is shown that the proposed procedures can be efficiently and accurately used for the calculation of lightning-induced voltages on overhead lines.
Effect of extraction solvent on total polyphenol content, total flavonoid content, and antioxidant activity of soursop seeds (Annona muricata L.)

Soursop (Annona muricata L.), a plant native to South America, is widely distributed in tropical and subtropical regions of the world. In this study, extract of A. Muricata was obtained using various solvents including distilled water, ethanol, ethyl acetate, and chloroform. Total polyphenol content, total flavonoid content and the antioxidant activity of A. muricata seed extracts were investigated using various in vitro assays. The highest extraction yield (23.60%) was obtained by using chloroform. The extract obtained by ethanol showed the highest total polyphenol content (282.71 ± 8.64 mg GAE/100g DW) and the highest flavonoid content (86.57 ± 3.20 mg QE/100g DW). The same extract also exhibited the highest DPPH (341.57 ± 6.90 AAE/100g DW), ABTS (382.20 ± 9.71 mg AAE/100g DW) radical scavenging activity and FRAP (369.84 ± 7.96 mg AAE/100g DW). These results indicate that A. muricata can be used in dietary applications with the potential to reduce oxidative stress.