Miracle-dz/UniFAR-FTUs huggingface dataset:
Origin of apparent colossal dielectric constants

Experimental evidence is provided that colossal dielectric constants e' ≥ 1000, sometimes reported to exist in a broad temperature range, can often be explained by Maxwell-Wagner-type contributions of depletion layers at the interface between sample and contacts or at grain boundaries. We demonstrate this on a variety of different materials. We speculate that the largest intrinsic dielectric constant observed so far in nonferroelectric materials is of order 10 2 .
Derived categories of functors and Fourier--Mukai transform for quiver sheaves

Let C be small category and A an arbitrary category. Consider the category C(A) whose objects are functors from C to A, and whose morphisms are natural transformations. Given a functor F : A --> B one obtains an induced functor F_C : C(A) --> C(B) . If A and B are abelian categories, we have that C(A) and C(B) are also abelian, and one has two functors R(F_C) : D(C(A)) --> D(C(B)) and (RF)_ C : C(D(A)) --> C(D (B)). The goals of this paper are: 1) to find a relationship between D (C(A)) and C(D(A)); 2) to relate the functors R(F_C) and (RF)_C. As an application, we prove a version of Mukai's Theorem for quiver sheaves.
Study of Anxiety among Male and Female Adolescents

Aim : To study anxiety among male and female adolescents . Materials and Methods : A sample of 200 adolescents (100 males and 100 females) was selected from Schools of Hoshiarpur, Punjab. For data collection, structured questionnaire of Beck Anxiety Inventory by Beck et al. (1988) was used. Results : A significant difference was found between the mean scores of anxiety among male and female adolescents. Conclusion : It was concluded that the male and female adolescents differ in anxiety. Female adolescents have high anxiety as compared to male adolescents.
MICRO- AND MACROGENESIS OF SEMANTIC ARCHITECTONICS OF CONSCIOUSNESS

The purpose of the article is to highlight the genetic and functional plans of the semantic architectonics of human consciousness. The procedure of theoretical and methodological research is based on the methodological background of the genetic and modeling approach of S.D. Maksymenko, cultural and historical concept of L.S. Vyhotskyi, activity and system paradigms. It is defined the concept of “semantic architectonics of consciousness” as a multidimensional semantic construction that “puts” traces of fixed previous interactions and attitudes into events and situations in the semantic fields and mnemic contexts. It is specified that the “world picture” is a system of variable and objective cases of conceptualization of semantic architectonics of individual’s consciousness - intentionally activated dynamic semantic network with multiformat structure of plurality of individually set images of the world and oneself in it and hierarchical semantic connections (relations) between all specific elements that make up partial images and the network as a whole. The sources of the unique emotional color of crystallized patterns are revealed. These sources determine the detail and scale of a person’s subjective reality, his or her subjective personal response to the influence of objective reality. It is proved that the genesis of new semantic connections creates internal conditions to act in an active way, changing one's life world (subjective reality), “setting” it for the real world in a more specific way. It is substantiated the procedural chain of finding of the meaning, the progress-movement of which as an instrument of man’s discovery of oneself and the world, has a transitional but inverse form, namely: “world” ← → “unconscious connotations of non-verbal experiences” that have somatopsychic manifestation ← → “necessity” ← → “interiorisation” (which is combined with the selectivity of perception of another person due to the action of imprintings and mnemic contexts) ← → “intention” ← → “attitude, activity” ← → “understanding and interpretation” ← → “meaning” ← → objectified “intersubjective meaning” ← → “world”.
Chameleon biogeographic dispersal is associated with extreme life history strategies

Understanding the role of traits in dispersal is necessary to improve our knowledge of historical biogeography, community assembly processes and predictions of species’ future movements. Here we aimed to determine the relationship between three traits (coastal distribution, body size, position on the fast/slow life history continuum) and past dispersal probability on an evolutionary timescale in chameleons (Chamaeleonidae). Using species’ distribution data we identified the nine most important biogeographic regions for all included chameleons (181/217 species). We compiled life history trait data and used phylogenetic factor analysis to infer independent body size and fast/slow life history trait axes. Finally, we tested whether traits and trait combinations related to biogeographic dispersal success in the past, using trait-depen-dent biogeographic models. All three traits were associated with past biogeographical movements. Lineages having coastal distributions and those with large bodies had higher dispersal probabilities. Interestingly, chameleons with either a very fast or very slow life history were more successful dispersers than species with an intermediate strategy. Together, the three traits – coastal, large-bodied and extreme life history – form a dispersal syndrome. Traits have played an important role in the biogeographic history of chameleons. While only fast traits have been linked to present-day invasion success in reptiles, both extremes of the life history spectrum were likely advantageous for dispersal and establishment during past biogeographic movements. Fast-living species may be less susceptible to stochastic extinction in the first phases of a colonization (due to rapid population growth), and slow-living species may be less vulnerable to environmental stochasticity (due to low demographic variability). Our results call for broader analyses testing the general influence of life history strategy in biogeographic dispersal success, which would help explain species distribution patterns on Earth.
A second order differential equation for a point charged particle

A model for the dynamics of a classical point charged particle interacting with higher order jet fields is introduced. In this model, the dynamics of the charged particle is described by an implicit ordinary second order differential equation. Such equation is free of run-away and pre-accelerated solutions of Dirac's type. The theory is Lorentz invariant, compatible with the first law of Newton and Larmor's power radiation formula. Few implications of the new equation in the phenomenology of non-neutral plasmas is considered.
Contribution a la résolution de contraintes sur les réels par propagation d'intervalles

Les algorithmes de propagation d'intervalles sont utilises pour approximer les domaines de variation des variables d'un systeme de contraintes (polynomiales, trigonometriques ou logarithmiques). Dans un premier temps, nous etudions ces algorithmes et proposons notamment une formalisation en termes de consistances partielles. Nous introduisons ensuite une famille de consistances partielles ainsi que des algorithmes associes qui fournissent de meilleures approximations des domaines de variation des variables. Ces techniques sont implantees dans le systeme interlog II, qui est sommairement presente
IS THE PERCOLATION PROBABILITY ON Z d WITH LONG RANGE CONNECTIONS MONOTONE

We present a numerical study for the threshold percolation prob- ability, pc, in the bond percolation model with multiple ranges, in the square lattice. A recent Theorem demonstrated by de Lima et al. (B. N. B. de Lima, R. P. Sanchis, R. W. C. Silva, STOCHASTIC PROC APPL 121, 2043-2048 (2011)) states that the limit value of pc when the long ranges go to innity converges to the bond percolation threshold in the hypercubic lattice, Z d , for some appropriate dimension d. We present the rst numerical estimations for the percolation threshold considering two-range and three-range versions of the model. Applying a nite size analysis to the simulation data, we sketch the dependence of pc in function of the range of the largest bond. We shown that, for the two-range model, the percolation threshold is a non decreasing function, as conjectured in the cited work, and converges to the predicted value. However, the results to the three-range case exhibit a surprising non- monotonic behavior for specic combinations of the long range lengths, and the convergence to the predicted value is less evident, raising new questionings on this fascinating problem.
Consistent supersymmetric decoupling in cosmology

The present work discusses several problems related to the stability of ground states with broken supersymmetry in supergravity, and to the existence and stability of cosmic strings in various supersymmetric models. In particular we study the necessary conditions to truncate consistently a sector of an N=1 supergravity theory while preserving supersymmetry, and on those models where these conditions are met we discuss how the breaking of supersymmetry in the light sector affects the stability of the truncated fields. In this thesis we also present a new type of supersymmetric cosmic string solutions in N = 2 supergravity. The corresponding model admits a family of cosmic string solutions with the same energy but different core radius. We study the stability of these strings against perturbations in a cosmological context, where the zero mode connecting different solutions within a family could be excited, leading to the spread of the magnetic flux and the disappearence of the string.
Nedd8 Modification of Cul-1 Activates SCF

Regulation of NF-kB occurs through phosphorylation-dependent ubiquitination of IkBa, which is degraded by the 26S proteasome. Recent studies have shown that ubiquitination of IkBa is carried out by a ubiquitinligase enzyme complex called SCF TrCP . Here we show that Nedd8 modification of the Cul-1 component of SCF TrCP is important for function of SCF TrCP in ubiquitination of IkBa. In cells, Nedd8-conjugated Cul-1 was complexed with two substrates of SCF TrCP , phosphorylated IkBa and b-catenin, indicating that Nedd8–Cul-1 conjugates are part of SCF TrCP in vivo. Although only a minute fraction of total cellular Cul-1 is modified by Nedd8, the Cul-1 associated with ectopically expressed bTrCP was highly enriched for the Nedd8-conjugated form. Moreover, optimal ubiquitination of IkBa required Nedd8 and the Nedd8-conjugating enzyme, Ubc12. The site of Nedd8 ligation to Cul-1 is essential, as SCF TrCP containing a K720R mutant of Cul-1 only weakly supported IkBa ubiquitination compared to SCF TrCP containing WT Cul-1, suggesting that the Nedd8 ligation of Cul-1 affects the ubiquitination activity of SCF TrCP . These observations provide a functional link between the highly related ubiquitin and Nedd8 pathways of protein modification and show how they operate together to selectively target the signal-dependent degradation of IkBa.
Cannot wait to share? An exploration of tourists’ sharing behavior during the ‘traveling to the site’ stage

ABSTRACT Although tourists’ social media sharing behavior has been well documented in existing literature, few studies have examined tourists’ early-stage sharing behaviors and their impact on the sharers. As one of the earliest stages of the tourism experience, tourists’ sharing behavior during the ‘traveling to the site’ stage undoubtedly affects their subsequent travel experience. Therefore, a thorough understanding of tourists’ social media sharing motivations while ‘traveling to the site’ is necessary, as is the impact of such sharing behavior on the sharers’ subsequent tourism stages. This study identified two categories of motivations for sharing behavior and three ways in which sharing behavior affects the sharer's subsequent travel experience using qualitative research methods and the interaction ritual chain theory.
Knowledge, Attitude and practice toward prescribing Antibiotics for Upper Respiratory Tract Infections among primary health care physicians in Cluster-1, Riyadh, Saudi Arabia

Background: Respiratory tract infections are among the most frequently encountered clinical conditions and upper respiratory tract infections (URTIs) are one of the most common reasons for consultations in primary health care centres. Antibiotics are often prescribed unnecessarily for URTIs around the globe. Identifying factors associated with the ubiquitous inappropriate prescribing of antibiotics for URTIs will help develop effective interventions and decrease antimicrobial resistance. The Aim of the study was to find out the resources of physicians’ knowledge regarding upper respiratory tract infection management, and to identify the clinical factors that might affect antibiotics prescription by primary health care physicians. Methodology: This is cross sectional observational quantitative study was carried out at Primary health care centres during the period from January to August 2021 in Cluster-1 Riyadh, Saudi Arabia. An online self-administered questionnaire was conducted on 197 physicians by using convenient sampling technique. The data was analysed using SPSS software version 23. The study was done on all physicians who have worked in primary health care in cluster 1 for one year or more, male and female, Saudi and non-Saudi, and including consultants, specialists, residents and general practitioners. Results: In this study, we were able to collect 197 responses of our questionnaire with mean age of 31.6 years old (SD= 6.27). More than half of the participants were males (54.8 %) and 72.6 % of them were residents. Furthermore, 91.9 % of the participants reported following of criteria or guidelines for prescribing of antibiotics in treatment of UTRI. Among those physicians, 88.4 % of them reported depending on centor criteria. Furthermore, 70.6 % of the physicians reported a frequency of patient requests for antibiotic 1-4 times during the past months and 44.7 % of them would not accept the patients request while 28.9 % would refuse and educate the patients and 21.3 % would agree according to guidelines. Conclusion: We found good to moderate level of knowledge among the physicians toward the use of antibiotics in treatment of URTI however, some improvement in the patient’s knowledge should be considered. Keywords: antibiotics, URTI, primary healthcare, Saudi Arabia
Optimized XGBoost Model with Small Dataset for Predicting Relative Density of Ti-6Al-4V Parts Manufactured by Selective Laser Melting

Determining the quality of Ti-6Al-4V parts fabricated by selective laser melting (SLM) remains a challenge due to the high cost of SLM and the need for expertise in processes and materials. In order to understand the correspondence of the relative density of SLMed Ti-6Al-4V parts with process parameters, an optimized extreme gradient boosting (XGBoost) decision tree model was developed in the present paper using hyperparameter optimization with the GridsearchCV method. In particular, the effect of the size of the dataset for model training and testing on model prediction accuracy was examined. The results show that with the reduction in dataset size, the prediction accuracy of the proposed model decreases, but the overall accuracy can be maintained within a relatively high accuracy range, showing good agreement with the experimental results. Based on a small dataset, the prediction accuracy of the optimized XGBoost model was also compared with that of artificial neural network (ANN) and support vector regression (SVR) models, and it was found that the optimized XGBoost model has better evaluation indicators such as mean absolute error, root mean square error, and the coefficient of determination. In addition, the optimized XGBoost model can be easily extended to the prediction of mechanical properties of more metal materials manufactured by SLM processes.
Bursts of transverse ion acceleration at rocket altitudes

High time resolution ion mass spectrometer distribution function measurements and wave data from a sounding rocket flight over an aurora have revealed the fine structure of the transverse ion acceleration mechanism in the upper ionosphere. The transversely accelerated ion (TAI) events can occur in a volume with a cross-field dimension as small as several tens of meters and thus appear as 50–100 ms ion bursts due to the rocket payload motion. Bulk heating to a characteristic energy of several eV and tail heating in the direction perpendicular to B of a few percent of ambient ions to a characteristic energy the order of 10 eV occur for both hydrogen and oxygen ions. The TAI at 90° pitch angle occur in localized regions of intense lower hybrid waves and in regions of density depletion. On close examination of the correlation between the wave bursts and the TAI it is believed that the waves produce the ion acceleration. The TAI occur during periods of field-aligned auroral electron bursts. Finally, near 1000 km altitude they occur about once every second. If the event presented here is considered average, the flux of TAI oxygen ions above 7 eV could account for the ion conic fluxes measured by the ISIS spacecraft.
Competitive Consistent Caching for Transactions

This paper studies cache policies for transactional caches. Different from conventional caches that focus on latency, transactional caches are primarily used to augment database systems and improve their transaction throughput by offloading read load onto the cache. A read transaction commits on the cache only if it is a consistent cache hit, i.e., all of its reads see a consistent view of the database. We prove that conventional cache policies are not competitive for transactions. We then show that for the large class of batching-based transaction systems, one can break the theoretical performance barrier of conventional cache policies via transaction consistency aware cache policies, although it is NP-complete to find the optimal ones. As a proof, we develop a consistent cache policy that is theoretically competitive under common cache schemes. To further exploit batching, we propose to reorder transactions within batches while guaranteeing that each transaction sees data values with bounded staleness. Using benchmarks and real-life workloads, we experimentally verify that our policy improves the transaction throughput of Memcached atop HBase by 126.95% on average, up to 479.27% higher than existing cache policies adopted for transactions.
Physical activity and quality of life in the group of women participating in senior education

Introduction. Maintaining mobility and extending the period of functional activity in everyday life is the basis for gerontological prevention for the elderly. An important task in the physical culture strategy for an aging society is to prepare both oneself and one’s family for old age (education "in old age" and "towards old age"). Educational institutions for activation of seniors play a very important role in this area. The aim of the study was to analyze the relationship between physical activity and quality of life of women 65+, including participation in senior education. Material and methods. The study was conducted among inhabitants of Tarnów province (southern Poland) aged 65+: 205 educationally active seniors (group I) and 207 women who do not benefit from senior education (group II). The diagnostic survey method and standardized interview technique using the WHOQoL-AGE quality of life questionnaire were used. The level of significance was adopted as p≤0.05. Results and conclusions. Educationally active seniors significantly more often declared systematic physical activity. Regular physical activity was most often undertaken by women in the youngest age group. It is recommended to carry out activities promoting participation in various forms of physical activity, especially in the two oldest age groups (old & oldest old). It is also proposed to continue research on the quality of life and its determinants by gender, and the results of these studies can be used by managers and decision-makers in the local health care sector to develop health-promoting strategies targeted at specific groups.
Reviewing Alumina-Zirconia Composite as a Ceramic Biomaterial

In orthopedics, increasing the implant lifetime minimizes the need for repair surgery, which benefits the patient’s health and the practice bottom line. The quality of the materials and designs is always being enhanced to reach the ultimate objective of a single implant that would last a person their whole life. The purpose of orthopedic treatments is to enhance the patient’s ability to participate in normal activities and socialize, and the implant carrier should not be subjected to unnecessary limitations. As a result, implants are exposed to severe mechanical stress and the inherently hostile in vivo biochemical environment, which is particularly prevalent in younger and more active people. The development of hip prosthesis design and materials has taken this path in recent years. This development is one of the most challenging problems in the field of implant technology in this century. In this study, various materials, including ceramics, glass, metal alloys, polymers, metal alloys, composites, and others, were used in an effort to combine biocompatibility with fatigue resistance, stiffness, hardness, the capacity to withstand dynamic and static stresses, and excellent chemical and mechanical wear resistance. The fracture toughness of zirconia-toughened alumina composites is increased by a factor of four compared to alumina by itself. Zirconia was first included in alumina as a densifier; however, it was not until much later that zirconia was used as a reinforcement particle to increase the level of toughness in the material. The use of ZTA to improve the mechanical properties of orthopedic implants has lately been the subject of several studies, which have all just been concluded. This research includes a literature review primarily concerned with the Biolox Delta composite, its microstructural properties, manufacturing and prosthesis materials for it to identify as a bioceramic material for medical applications.
Lactic acid production by immobilization of Lactobacillus sp. isolated from olive mill wastewater

The aim was to investigate the production of lactic acid by Lactobacillus sp. isolated from olive mill wastewater (OMW). The bacterial strains were immobilized on bovine bone and pozzolan supports. The best acidifying activity was detected in the strain Lb16 ( Lb. rhamnosus ) with an acidity equal to 45°D. All fermentations exhibited a biphasic growth (diauxie). The best lactic acid production was noted in MRS (de Man, Rogosa and Sharpe) broth with the strain immobilized in continuous culture on pozzolan (17 g L –1 ) and bovine bone (11 g L –1 ), in non-supplemented OMW medium with bovine bone support in batch mode (6.2 g L –1 ), 4.5 g L –1 on the pozzolan support and 3.8 g L –1 on the bovine bone support at continuous mode. For OMW medium supplemented with 25% whey, the best lactic acid production by Lb. rhamnosus was seen in a discontinuous batch with 8.1 g L –1 on bovine bone support, followed by 7.4 and 6.4 g L –1 respectively on the pozzolan and bovine bone in continuous mode. The study has demonstrated that it is possible for an agri-food effluent (i.e., olive mill wastewater) to produce a valuable biochemical product (i.e., lactic acid). Further work is needed to optimize process parameters such as the optimal OMW/whey ratio and nutrient supplementation. ,