Miracle-dz/UniFAR-FTUs huggingface dataset:
How to access QED at a supercritical Coulomb field

In slow collisions of two bare nuclei with the total charge number larger than the critical value, Zcr≈173, the initially neutral vacuum can spontaneously decay into the charged vacuum and two positrons. Detection of the spontaneous emission of positrons would be the direct evidence of this fundamental phenomenon. However, the spontaneous emission is generally masked by the dynamical positron emission, which is induced by a strong time-dependent electric field created by the colliding nuclei. In our recent paper [I. A. Maltsev et al., Phys. Rev. Lett. 123, 113401 (2019)PRLTAO0031-900710.1103/PhysRevLett.123. 113401] it has been shown that the spontaneous pair production can be observed via measurements of the pair-production probabilities for a given set of nuclear trajectories. In the present paper, we have significantly advanced this study by exploring additional aspects of the process we are interested in. We calculate the positron energy spectra and find that these spectra can give a clear signature of the transition from the subcritical to the supercritical regime. It is found that focusing on a part of the positron spectrum, which accounts for the energy region where the spontaneously created positrons can contribute, allows us to get a much stronger evidence of the transition to the supercritical mode, making it very well pronounced in collisions, for example, of two uranium nuclei. The possibility of extending this study to collisions of bare nuclei with neutral atoms is also considered. The probability of a vacancy in the lowest-energy state of a quasimolecule which is formed in collisions of a bare U nucleus with neutral U and Cm atoms has been calculated. The relatively large values of this probability make such collisions suitable for observing the vacuum decay.
Cooperative Collaboration in the Hybrid Space of Google Docs Based Group Work

This study investigates how Google Docs is used and affects group work in classrooms. Inspired by networked learning theory and the concept of learning spaces in education theory, Google Docs group work is conceptualized as a hybrid learning space. Based on close video ethnographic examinations of group work sessions, the analysis focuses upon what the pupils actually do when combining oral and written communication, how the hybrid Google Docs space affects collaborative and cooperative activity, as well as the role of the group’s social context. Whereas Google Docs is often associated with collaboration, the findings in this study suggest: (1) that Google Docs in fact helps single group members to establish multimodal leadership to dominate the hybrid learning space of the group work settings; and (2) that Google Docs provides space for non-leaders to make cooperative contributions. This motivates a conceptual reassessment of collaboration and cooperation as working patterns before the paper ends with a discussion of potential pedagogical implications for the use of Google Docs in group work.
Genetic Variability, Heritability and Genetic Advance in Chilli (Capsicum annum L.) Genotypes

Chilli (Capsicum annuum L.) is one of the most important vegetables as well as spice and cash crop of India. Chilli is a member of the Solanaceae family, originated from South and Central America. Chilli is very rich source of vitamin A and C. Green fruit of chilli is one of the richest sources of antioxidant. The pungency is due to alkaloid capsaicin. The genus Capsicum consists of approximately 22 wild and 5 cultivated species, which includes C. annuum, C. baccatum, C. chinense, C. frutescens and C. pubenscens. Chilli has been classified under often cross pollinated crops and the extent of natural out crossing has also reported up to 66.4 per cent (Singh et al., 1994). A wide range of variability in chilli is available which provide a great scope for improving fruit yield through a systemic and planned selection programme. Burton (1953) suggested that genetic variability along with heritability should be considered for assessing the maximum and accurate effect of selection. The knowledge of nature and magnitude of genetic variability in the population is of immense value for planning of efficient breeding programme to improve the yield potential of the genotype. Heritability is the portion of phenotypic variation which is transmitted from parent to progeny. High the heritable variation, greater will be the possibility of fixing the characters by selection. Hence, heritability studies are of foremost importance to judge whether the observed variation for a particular character is due to genotype or due to environment. International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 9 (2017) pp. 2704-2709 Journal homepage: http://www.ijcmas. com
Bioaccumulation of trace metals in Mediterranean mussels (Mytilus galloprovincialis) from a fish farm with copper-alloy mesh pens and potential risk assessment

ABSTRACT Concentrations of trace metals were determined in the muscle tissue, digestive gland and gills of Mediterranean mussels (Mytilus galloprovincialis) collected from different locations around an offshore copper alloy fish farm. Levels of copper (Cu), zinc (Zn), manganese (Mn) and iron (Fe) as mg/kg wet weight in the edible part of the mussels collected from distant zone (upstream Zn7.33 > Fe2.8 > Cu0.13 > Mn0.07 and downstream Zn9.9 > Fe5.67 > Cu0.18 > Mn0.17) were significantly lower (p < 0.05) than those sampled from the cage zone (bottom panel Zn22.25 > Fe13.75 > Cu2.39 > Mn0.85 and cage frame Zn17.1 > Fe8.74 > Cu1.39 > Mn0.26). Trace metal concentrations in mussels were significantly higher (p < 0.05) in the samples from the frame and bottom panel of the copper alloy mesh pen, compared to those from distant areas, namely the farm affected downstream -and non-affected upstream locations. However, the rates of target hazard quotients (THQ) for all tested trace metals from all locations in the present study were smaller than “one” (THQ < 1), indicating that the consumption of mussels grown around a cage farm with copper alloy mesh pens were within safe limits and did not exceed maximum levels suggested by the US Food and Drug Administration (USFDA) and European Union (EU) regulations for seafood consumption.
Translating cell biology of ageing? On the importance of choreographing knowledge

This paper describes and explores how translational research models, embedded in institutions and standards, interact with the epistemic and material practices of cell biologists of ageing, a field re-energized by emergent technoscientific promises that hinge on the possibility of eliminating or manipulating senescent cells to tackle age-related diseases. Drawing on a 3-year long lab ethnography, the paper suggests that knowledge making in cell biology of ageing relies on two different epistemic and material cultures, to then argue that these cultures combine in four different types of experimental systems, only one of which can properly be seen as pertaining to translation as usually conceived. The paper further analyses how cell biologists articulate the linear temporality of translational research with the unfolding experimental chains where, by shifting between types of experimental system, cell biologists are able to generatively reconfigure their epistemic objects, and the consequences of this fragile arrangements for the field.
Çocuk ve adölesan tirotoksikosiz vakalarının değerlendirilmesi – tek merkez deneyimi

Giris: Cocukluk ve adolesan cagindaki tirotoksikozis vakalarinin klinik ve biyokimyasal ozelliklerini, tedavi sonuclarini degerlendirmek. Gerec ve yontem: 2015-2019 yillari arasinda pediatrik endokrin kliniginde tirotoksikozis tanisiyla izlenen hastalarin dosyalari geriye donuk incelendi. Bulgular: Calismaya dahil edilen 18 hastanin 14’u (%77,7) kiz, 4’u (%22,2) erkekti. Tani anindaki ortalama yas 14,58±2,1 yildi. Onbes (%83,3) hasta Graves hastaligi, 3 (%16,6) hasta ise hashitoksikoz tanisi aldi. Graves hastaligi tanisi alan hastalarin en sik basvuru sikayetleri halsizlik, tasikardi/carpinti, boyunda sislikti. Diger sikayetler, kilo kaybi, tremor ve gozde buyumeydi. Oniki (%66,6) hastada hipertiroidi acisindan aile oykusu pozitifti. Dokuz (%50) hastanin fizik muayenesinde guatr saptandi. Graves hastaligi tanisi alan 15 hastanin 5 (%33)’inde oftalmopati vardi. Metimazol baslangic dozu 0,43±0,3 (0,1–1) mg/kg/gun ve ortalama izlem suresi 22,3±6,3 aydi. Hashitoksikoz tanisi alan 3 hastanin 2’sinin semptomlari sadece beta-bloker tedavisiyle kontrol altina alinirken bir hastanin hicbir medikal tedaviye ihtiyaci olmadi. 15 Graves hastasinin 11 (%73)’ine tedavi basinda beta bloker baslandi. Ortalama beta bloker dozu 31,6±10,2 (20-80) mg/gun saptandi. Metimazol baslanan hicbir hastanin izleminde yan etki gorulmedi. Sonuc: Graves hastaligi ve hashitoksikoz cocukluk ve adolesan donemde gorulen tritoksikoz vakalarin cogunu olusturur. Hashitoksikozun prognozu daha iyi oldugu icin bu iki hastaligi baslangicta ayirt etmek gereklidir. Her ne kadar cocukluk ve adolesan cagi tirotoksikoz tedavisi icin kanita dayali stratejiler olmasa da metimazol tedavide ilk secenektir. Cocukluk ve adolesan cagi tirotoksikozu anlayabilmek icin daha cok merkezin deneyimlerini paylasmasina ihtiyac vardir.
Determinants of telomere length and implications in life history trade-offs

Evolutionary pathways through which life histories may have evolved are numerous. Consequently identifying the underlying mechanisms of those processes is crucial for our overall comprehension of the origin of life diversity. Thus, there is clearly a great potential in the study of repetitive DNA sequences that cap eukaryotic chromosomes, the telomeres. Telomeres are structures involved in cell senescence and determine the rate of ageing. They are thought to reflect more than just the effects ofage and to play an important role in linking life conditions and senescence. Indeed, telomeres could act as markers of life style and of past-historical levels of stress and inform on individuals’ current physiological quality. This thesis aims to determine whether telomeres could act as a mechanism underlying life history trade-offs by establishing the pattern of heritability of telomere length; characterising telomere length’s determinants; testing the nature of the relationship between telomerelength and individual maintenance, and ultimately with individual quality. The present work shows that telomere dynamics is determined by genetic factors, but is probably predominantly affected by lifestyle factors. As such, environmental conditions experienced during the growth period, as well as during adulthood (i.e. level of reproductive effort) have a strong impact on individuals’ telomere length. Experimental manipulation of telomerase activity showed that telomere length could be linked to individual maintenance and thus might be indicative of individual quality. Altogether, these results highlight that telomere dynamics might provide a functional link between life history traits.
Stability Analysis for Growth and Yield Attributes in Brinjal (Solanum melongena L.)

The present investigation was carried out to study stability performance over three locations for fruit yield and its components in 51 genotypes (36 hybrids + 15 parents) of brinjal using Line x Tester mating design. The analysis further revealed that component of G x E interactions were significant for plant height, days to 50 per cent flowering, average fruit weight, number of fruits per plant, fruit yield per plant and ascorbic acid indicating that linear as well as own linear component were important. In present experiment, none of the parent showed average stability for fruit yield per plant and its component characters while only one cross, JBL-08-08 x NSR-1 exhibited average stability for fruit yield per plant. Parents as a group yielding slightly higher mean value as compared to hybrids.
Predictors of job burnout among fieldwork supervisors of social work students

Summary In the helping professions, professional burnout is widely acknowledged to play a key role in work retention and turnover. However, although the literature on fieldwork education in social work engages with the importance of continuity and commitment regarding the role of fieldwork supervisor, the effects of job burnout are under-researched. Furthermore, there is also a gap in the literature with respect to the internal factors that contextualize burnout and retention among fieldwork supervisors. Against this background, the objective of the present study was to examine the factors that predict professional burnout among fieldwork supervisors in Israel. Questionnaires measuring burnout, as well as several internal explanatory factors for burnout—career identity, work significance, and personality traits—were used. Findings The findings of the study indicated that career identity, together with the personality characteristics of agreeableness and consciousness predict burnout negatively, while neuroticism positively predicts burnout. Applications The article discusses these findings in light of resource conservation and existential theories of burnout, as well as the potential implications for practice and policy.
Bank Concentration and Financial Risk in Jordan

Received February 28, 2020 Revised from March 25, 2020 Accepted April 29, 2020 Available online September 15, 2020 The main aim of this paper is to investigate the relationship between bank concentration and bank risk in the Jordanian banking industry from 2005 to 2016. While controlling for bank fundamentals and business cycle, we used two measurements to measure bank risk (Z-score and Non-performing loan ratio) and three measurements of bank concentration (Herfindahl–Hirschmann Index, Concentration Ratio and the Lerner Index). We applied the two-step Generalized Method of Moments (GMM) to analysis this relationship between concentration and risk. The empirical evidence shows bank concentration has a positive relationship with risk measured using non-performing loan ratio, and a negative relationship using Z-score. This suggests greater market power leads to greater risks, which in turn supports the concentration-fragility theory. JEL classification: G32 G21 G33 DOI: 10.14254/1800-5845/2020.16-3.3
LEXICAL BUNDLES IN STUDENTS’ ESSAY WRITING

This study was aimed to find out the frequency of three- word and four- word of lexical bundles which were used in the essay writing of the undergraduate students studying at English Education Department of Syiah Kuala University. This study employed a corpus based analysis which compiled a specialized small corpus consisting of 161 students’ essays under linguistic topic. In order to generate the frequent list of sequences, computational software named AntConc 3.5. 8 by Laurent Anthony was used. The results showed that the number of three-word bundles was higher than four-word bundles in terms of the frequency of co-occurrence in which the most common expression the function of as three-word bundles and the advantages of being as four-word bundles were found.
Evaluation of Antioxidant and Cholinesterase Inhibitory Activities of Hoya parasitica Variegata - An In-vitro Study

Aim: Oxidative stress is responsible for the development of different neurological disorders such as Alzheimer’s disease (AD). In the present study, Hoya parasitica variegata belonging to the family Apocynaceae was evaluated for its cholinesterase inhibitory and antioxidant activities with an objective of searching a new natural source to treat different neurological disorders. Study Design: The methanolic extract of H. parasitica was subjected for in-vitro evaluation which included antioxidant and cholinesterase inhibitory activities. Results: Total phenolic and flavonoid content of the extract were 53.31 mg of gallic acid and 129.88 mg of quercetin equivalent respectively. The methanolic extract of H. parasitica (MEHP) showed considerable total antioxidant activity and reducing capacity. In DPPH and hydroxyl radical scavenging assay, the MEHP showed IC 50 of 485 μg/mL and 39.65 μg/mL respectively. In lipid peroxidation inhibition activity MEHP showed IC 50 value of 857.63 μg/mL and exhibited metal chelating activity with IC 50 value 961.21 μg/mL. The MEHP represented inhibition of bovine brain acetylcholinesterase and human blood butyrylcholinesterase and the IC 50 value was 269.5 μg/mL and 343.14 μg/mL respectively. Conclusion: The results obtained from present study revealed that MEHP has considerable amount of antioxidant activity as well as anti-acetylcholinesterase and anti-butyrylcholinesterase activity suggesting its potential use in different neurological disorders such as AD.
Morphologically constrained modeling of spinous inhibition in the somato-sensory cortex

Pyramidal neurons are covered by thousands of dendritic spines receiving excitatory synaptic inputs. The ultrastructure of dendritic spines shapes signal compartmentalization but ultrastructural diversity is rarely taken into account in computational models of synaptic integration. Here, we developed a 3D correlative light-electron microscopy (3D-CLEM) approach allowing the analysis of specific populations of synapses in genetically defined neuronal types in intact brain circuits. We used it to reconstruct segments of basal dendrites of layer 2/3 pyramidal neurons of adult mouse somatosensory cortex and quantify spine ultrastructural diversity. We found that 10% of spines were dually-innervated and 38% of inhibitory synapses localized to spines. Using our morphometric data to constrain a model of synaptic signal compartmentalization, we assessed the impact of spinous versus dendritic shaft inhibition. Our results indicate that spinous inhibition is locally more efficient than shaft inhibition and that it can decouple voltage and calcium signaling, potentially impacting synaptic plasticity.
Habitat Selection Important for Red Snapper Feeding Ecology in the Northwestern Gulf of Mexico

AbstractThe present study compared Red Snapper Lutjanus campechanus feeding ecology among seasons, sizes, and natural reefs, and between natural and artificial reefs located on the Louisiana shelf edge. As low-quality diets may hinder growth, reduce condition, and lead to poor reproductive output, information on diets for various habitat types occupied by Red Snapper is critical. This study utilized both stomach content analysis and nitrogen (δ15N) and carbon (δ13C) stable isotope analysis of muscle tissue. Fishes dominated Red Snapper diets at all sites, in all seasons, and generally for all size-classes. A high biomass of zooplankton was consumed at the artificial reef area and during spring. The largest natural reef provided the widest diversity of prey items, and there was little overlap in prey species consumed between natural and artificial reef habitats. Higher δ15N and lower δ13C values were found for Red Snapper at the artificial reef area, and contrary to the diet results, distinct isotopic nich.
3D modeling and simulation of morphogenesis

The embryo of the Drosophila Melanogaster undergoes a series of cell movements during its early development. Gastrulation is the process describing the segregation of the future internal tissues into the interior of the developing embryo. Gastrulation starts with the formation of the ventral furrow, a process commonly known as the ventral furrow invagination. During this process, the most ventrally located blastoderm cells flatten and progressively constrict their apical sides until they are wedge shaped. As a result of these cell-shape changes, the blastoderm epithelium first forms an indentation, the ventral furrow, which is then completely internalized. We focus on the study of the mechanisms that drive the invagination. The main questions that gave birth to this thesis are: “What is the role of the apical constriction of the ventral cells in the invagination? ” and “Once the ventral cells are internalized, what is the mechanism that drives the ventral closure? ” We attempt to answer to these two questions from a biomechanical point of view. For this purpose, a 3D mesh of the embryo of the Drosophila Melanogaster has been created. Based on this mesh, two “a minima” biomechanical models of the Drosophila embryo have been created, a physically based discrete model and a model based on the Finite Element Method. The results of the simulations in both models show that the geometry of the embryo plays a crucial role in the internalization of the ventral cells. The two models efficiently simulate the internalization of the ventral cells but are incapable of reproducing the ventral closure. We hypothesize that the ventral closure can be explained by the interplay of forces developed in the embryo once the internalized ventral cells undergo cell division. We propose an approach to divide elements in a Finite Element Mesh and we integrate it to the Finite Element Model of the Drosophila Melanogaster.
A Continuous-Time Semi-Markov Model for Animal Movement in a Dynamic Environment

We consider an extension to discrete-space continuous-time models animal movement that have previously be presented in the literature. The extension from a continuous-time Markov formulation to a continuous-time semi-Markov formulation allows for the inclusion of temporally dynamic habitat conditions as well as temporally changing movement responses by animals to that environment. We show that with only a little additional consideration, the Poisson likelihood approximation for the Markov version can still be used within the multiple imputation framework commonly employed for analysis of telemetry data. In addition, we consider a Bayesian model selection methodology with the imputation framework. The model selection method uses a Laplace approximation to the posterior model probability to provide a computationally feasible approach. The full methodology is then used to analyze movements of 15 northern fur seal (Callorhinus ursinus) pups with respect to surface winds, geostrophic currents, and sea surface temperature. The highest posterior model probabilities belonged to those models containing only winds and current, SST did not seem to be a significant factor for modeling their movement.
The Complexity of the 2018 Kaktovik Earthquake Sequence in the Northeast of the Brooks Range, Alaska

We use mainly geodetic observations to constrain the fault geometry and coseismic distribution of the 2018 Kaktovik earthquake sequence, Alaska. We find that at least three faults were activated. The earthquake sequence ruptured mainly an ESE‐striking, SSW‐dipping strike‐slip fault and a secondary rupture on an SE‐striking, SW‐dipping normal fault. Slip also occurred on a small SSW‐striking fault plane, which is found first in geodetic data and further verified with geological data and focal mechanism solutions. We also map 6 months of postseismic deformation and find obvious displacements in the center of the Sadlerochit Mountains. A geological model is proposed to interpret the relationship between this earthquake sequence and the regional structure. We suggest that the 2018 Kaktovik earthquake sequence may first have occurred on a fault unknown prior to the mainshock and triggered slip on both the pre‐existing ramp structure below the Sadlerochit Mountains and a secondary structure.