Dominant Behavior Research Articles

Some mechanisms of formation of intrapersonal and interpersonal conflicts related to the personality characteristics of the Dominant and Subordinate person in the parental family

The object of the study is the patterns of formation of intrapersonal and interpersonal conflicts, which are the result of the desire to rise above the Dominant family member and not live life as a subordinate family member. The conflicts arising in the process of realizing the following desires were analyzed: 1) to realize a dream that the Dominant could not realize; 2) to possess the skills and qualities of people in relation to whom the Dominant felt feelings of delight, respect, admiration, awe, envy; 3) to do what the Dominant was afraid of (or do something that could frighten the Dominant); 4) not to fall into the category of people that the Dominant considered "weaklings"; 5) to do something that could cause impotent rage (panic) in the Dominant; 6) to have such skills or qualities that the Dominant was proud of, took credit for; 7) to have those skills and qualities that the person possessed, who has managed to rise above the Dominant One in some way; 8) marry a person who will help realize the above desires, etc.n This work is a qualitative study of a structured interview, which was previously the subject of a quantitative study published earlier. The detailed answers of the subjects were classified according to the types of conflicts described in them. The novelty lies in the fact that on the basis of these basic aspirations, a number of private needs have been identified, the inability to satisfy which leads to intrapersonal and interpersonal conflicts. A cognitive distortion has been revealed regarding the "helplessness" and "inoffensiveness" of people of the same sex as the Subordinate. The following personality structure is proposed: 1) ideas about what is "strong" behavior (based on the child's observation of the Dominant behavior, which ensures success in the eyes of a Subordinate); 2) ideas about what is "weak" behavior (based on observation of the Subordinate's behavior, which, from the child's point of view, makes him a slave) 3) ideas about "strong" and "weak", "decent" and "unworthy" behavior that exist in society. It is assumed that the driving force of personality development is the resolution of contradictions found by the child between these three elements.

Testosterone administration decreases sensitivity to angry facial expressions in healthy males: A computational modeling approach

Previous research indicates that higher testosterone levels are related to increased aggressive and dominant behaviors, particularly in males. One possible mechanism for these hormone-behavior associations could involve threat perception. However, the causal influence of testosterone on men's recognition of threatening facial expressions remains unknown. Here, we tested the causal effect of exogenous testosterone on men's sensitivity to facial threat by combining a psychophysical task with computational modeling. We administered a single dose (150 mg) of testosterone or placebo gel to healthy young men (n = 120) in a double-blind, placebo-controlled, between-participant design. Participants were presented with morphed emotional faces mixing anger/fear and neutral expressions and made judgments about the emotional expression. Across typical regression analysis, signal detection analysis, and drift diffusion modeling, our results consistently showed that individuals who received testosterone (versus placebo) exhibited a lower perceived sensitivity to angry facial expressions. But we observed no significant effects of testosterone administration on fearful facial expressions. The findings indicate that testosterone attenuates sensitivity to facial threat, especially angry facial expressions, which could lead to a misestimation of others' dominance and an increase in one’s own aggressive and dominant behaviors.

Manufacturing of emulsion type garlic paste: Characterization of rheological properties as affected by lecithin, guar gum, and olive oil using steady, dynamic, and three interval thixotropy tests

AbstractThe objective of this work was to investigate the steady, dynamic mechanical properties, and 3 interval thixotropy test (3 ITT) characterization of emulsion type garlic paste prepared with different concentrations of lecithin, guar gum, and olive oil. A three factor and three level Box Behnken design of response surface methodology was used to specify the physicochemical, steady shear, viscoelastic and deformation and recovery properties (applying 3 ITT) of paste. Garlic paste samples showed non‐Newtonian shear thinning behavior and Herchel–Bulkley model was fitted to the data satisfactorily (R2 > 0.85). Dry matter contents were in the range of 37.13%–41.14% depending on the processing variables. Dynamic mechanical spectrum showed that the garlic paste was weak gel having dominant viscous behavior compared to elastic behavior. Three interval thixrotropy test showed that the samples showed partial recovery after deformation due to the weak gel like character. Optimization showed that the maximum consistency (114.6 Pa sn) would be at 2.11 g lecithin, 0.11 g guar gum and 14.96 mL olive oil while the minimum value (49.16 Pa sn) would be at 1.02 g lecithin, 0.11 g guar gum, and 5.81 mL olive oil. Overall, the findings of this investigation revealed that the physicochemical and rheological characteristics of garlic paste can be significantly influenced by the concentrations of lecithin, guar gum, and olive oil. It is crucial to carefully select the appropriate concentration levels to achieve the desired quality of garlic paste.Practical applicationsGarlic is one the most popular vegetables consumed by the people due to its characteristic taste and aroma. Because of its functional properties, garlic is also used as an additive for food formulation. In this study, garlic is used for the production of garlic paste which could be used for food formulations as a taste enhancer or salad aromatizer. Accurate and dependable rheological data play a crucial role in designing flow processes, assessing the deformation and recovery rates of substances during various engineering operations and preparation of new food formulations. In this context, we developed a predictive model by response surface methodology which estimates physico‐chemical and rheological properties of garlic paste samples. Therefore, this study holds significant importance in terms of estimating the physicochemical and rheological properties of garlic paste for food manufacturers.

Fabrication of Hollow and Hierarchical CuO Micro-Nano Cubes Wrapped by Reduced Graphene Oxide as a Prospective Anode for SIBs.

In this study, hollow and hierarchical CuO micro-nano cubes wrapped by reduced graphene oxide (H-CuO MNCs@rGO) were designed and successfully fabricated via a novel three-step wet-chemical method. Benefiting from its unique hollow and hierarchical micro-nano structures, H-CuO MNCs@rGO exhibited significantly enhanced electrochemical Na+ storage performance when utilized as anode material for sodium-ion batteries (SIBs). Specifically, H-CuO MNCs@rGO demonstrated a specific capacity of 380.9 mAh g-1 in the initial reversible cycle and a capacity retention of 218.9 mAh g-1 after 150 cycles at a current density of 300 mA g-1. Furthermore, through the dominant pseudocapacitive behavior, an optimized rate capability of 221.2 mAh g-1 at 800 mA g-1 can be obtained for H-CuO MNCs@rGO. The comprehensive Na+ storage properties of H-CuO MNCs@rGO obviously exceeded those of hollow CuO cubes (H-CuO MNCs) and bulk CuO anodes. Such enhanced Na+ storage performances of H-CuO MNCs@rGO can be attributed to its reasonable hollow and hierarchical micro-nano structures, which provide abundant redox active sites, shorten Na+ migration pathway, buffer volume expansion, and improve electronic/ionic conductivity during sodiation/desodiation process. Our strategy provides a facile and innovative approach for the design of CuO with rational micro-nano structure as a high-performance anode for SIBs, which would also be a guiding way for tailoring transition metal oxides in other scalable and functional applications.

Acetylcholine muscarinic M1 receptors in the rodent prefrontal cortex modulate cognitive abilities to establish social hierarchy.

In most social species, the attainment of social dominance is strongly affected by personality traits. Dominant individuals show better cognitive abilities, however, whether an individual's cognition can determine its social status has remained inconclusive. We found that mice show better cognitive abilities tend to possess a higher social rank after cohousing. The dynamic release of acetylcholine (ACh) in the prelimbic cortex (PL) is correlated with mouse dominance behavior. ACh enhanced the excitability of the PL neurons via acetylcholine muscarinic M1 receptors (M1). Inhibition of M1 impaired mice cognitive performance and induced losing in social competition. Mice with M1 deficiency in the PL performed worse on cognitive behavioral tests, and exhibited lower status when re-grouped with others. Elevating ACh level in the PL of subordinate mice induced winning. These results provide direct evidence for the involvement of M1 in social hierarchy and suggest that social rank can be tuned by altering cognition through cholinergic system.

Multivariate study of lice (Insecta: Psocodea: Phthiraptera) assemblages hosted by hummingbirds (Aves: Trochilidae).

Lice were collected from 579 hummingbirds, representing 49 species, in 19 locations in Brazil, Costa Rica, Honduras, Paraguay and Peru, at elevations 0–3000 m above sea level. The following variables were included in an ecological analysis (1) host species' mean body mass, sexual size dimorphism, sexual dichromatism, migratory behaviour and dominance behaviour; (2) mean elevation, mean and predictability of temperature, mean and predictability of precipitation of the host species' geographic area; (3) prevalence and mean abundance of species of lice as measures of infestation. Ordination methods were applied to evaluate data structure. Since the traits are expressed at different scales (nominal, interval and ratio), a principal component analysis based on d-correlations for the traits and a principal coordinates analysis based on the Gower index for species were applied. Lice or louse eggs were found on 80 (13.8%) birds of 22 species. A total of 267 lice of 4 genera, Trochiloecetes, Trochiliphagus, Myrsidea and Leremenopon, were collected, with a total mean intensity of 4.6. There were positive interactions between migration behaviour and infestation indices, with elevational migrants having a higher prevalence and abundance of lice than resident birds. Further, we found weak negative correlations between host body mass and infestation indices and positive correlations between mean elevation and prevalence and abundance of Trochiliphagus. Thus, formerly unknown differences in the ecological characteristics and infestation measures of Trochiliphagus and Trochiloecetes lice were revealed, which allows a better understanding of these associations and their potential impacts on hummingbirds.

Electrochemical Properties of PEDOT:PSS/Graphene Conductive Layers in Artificial Sweat.

Electrodes based on PEDOT:PSS are gaining increasing importance as conductive electrodes and functional layers in various sensors and biosensors due to their easy processing and biocompatibility. This study investigates PEDOT:PSS/graphene layers deposited via spray coating on flexible PET substrates. The layers are characterized in terms of their morphology, roughness (via AFM and SEM), and electrochemical properties in artificial sweat using electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The layers exhibit dominant capacitive behavior at low frequencies, with cut-off frequencies determined for thicker layers at 1 kHz. The equivalent circuit used to fit the EIS data reveals a resistance of about three orders of magnitude higher inside the layer compared to the charge transfer resistance at the solid/liquid interface. The capacitance values determined from the CV curves range from 54.3 to 122.0 mF m-2. After 500 CV cycles in a potential window of 1 V (from -0.3 to 0.7 V), capacitance retention for most layers is around 94%, with minimal surface changes being observed in the layers. The results suggest practical applications for PEDOT:PSS/graphene layers, both for high-frequency impedance measurements related to the functioning of individual organs and systems, such as impedance electrocardiography, impedance plethysmography, and respiratory monitoring, and as capacitive electrodes in the low-frequency range, realized as layered PEDOT:PSS/graphene conductive structures for biosignal recording.

Elucidating the microscopic origin of observed anti-correlation between the protein-protein and protein-water interaction energies

Water as a solvent plays an important role in dictating the structure and dynamics of the large biomolecules like proteins. It has been proposed that the protein dynamics and energetics are closely coupled to the water molecules in the hydration shell. In particular, it has been shown earlier that the fluctuations in intra-protein (protein-protein) interaction energy is strongly anti-correlated with the protein-water interaction energy (solvation energy). Moreover, the dynamical signatures of water gets reflected into the protein dynamics in terms of a dominant power law behavior. In this work, we have carried out systematic molecular dynamics (MD) simulations of three different protein systems to understand the key physical factors that contribute to such anti-correlations. First, we compare the dynamics in globular folded proteins like Lysozyme with intrinsically disordered peptides (IDPs) like Amyloid beta to show that enhanced conformational fluctuations lead to significantly stronger anti-correlation. Trp-cage miniprotein shows a similar behavior distributed over two sub-ensembles of folded and unfolded states. We also investigate what type of interactions and molecular processes are responsible for the observed anti-correlation. In particular, we observe that the extent of correlation decreases significantly in the order of charged, polar and non-polar amino acid residues. Charged residues that form salt bridge interactions show a dominant anti-correlation. Surprisingly, a few non-polar (hydrophobic and buried) residues demonstrate significant anti-correlation as well. We attribute this to the structural fluctuations that lead to an equilibrium between buried and solvent exposed states of these residues, where the protein-protein and protein-water interactions compensate each other. Our studies indicate that the molecular origin of the observed anti-correlation can be vary depending on the type of the interaction. The overall coupling/correlation is dominated by the electrostatic interactions and charged residues due to a general dielectric screening effect, whereas a few buried hydrophobic residues may also show such coupling due to structural dynamics between buried and exposed states.

Fish collagen peptides, an effective starch gelatinization regulator, modify the processing properties and improve the nutritional value of wheat starch

Owing to diverse functional and bioactive properties, fish collagen peptides (FCP), a by-product from the fish processing industry, have garnered popularity among consumers. The primary objective of this study is to investigate the impact of FCP on wheat starch (WS) gelatinization and evaluate its application potential in starchy food. Pasting and thermal analyses indicated the degree of starch gelatinization decreased linearly as the concentration of FCP increased. Under the peptide concentration, the peak viscosity and enthalpy change were reduced by 76.54% and 26.23%, respectively. FCP competed with WS for available water, resulting in the preservation of more intact starch granules after gelatinization. Rheological results suggested that FCP reduced the viscosity and weakened the gel structure of starch pastes. With decreased tanδ, starch pastes presented a more dominant elastic behavior. Moreover, FCP alleviated the digestion rate of WS, with the rapidly digestible starch content decreasing from 79.94% to 73.19% and the resistant starch content increasing from 11.67% to 17.06%. Fourier transform infrared spectroscopy and X-ray diffraction analysis demonstrated that FCP improved the ordered structures of WS and hydrogen bonds played a pivotal role in the property changes of starch. Consequently, it is inferred that FCP holds considerable promise as a starch gelatinization regulator, which is capable of modifying the processing properties and enhancing the nutritional value of starchy food.

Analysis of risky food consumption behavior among university students

Non-communicable diseases (NCD) and oral disease problems can arise in all age groups, including teenagers. Risky behavior is caused by a poor lifestyle and other factors. This study aimed to determine risky behavior and NCD incidence as well as oral problems in students at the Yogyakarta campus. This can lead NCD and oral problems. This research is quantitative descriptive-analytic research condected in a private university in Yogyakarta. The data was collected through an electronic questionnaire (Google form) and analyzed descriptively. Among the students' risky behaviors, 87.27% consumed excessive sweet food, 87.88% salty food, 82.42% oily food, 80% of seasonings, 57.58% consumed instant noodles, 84.85% consumed too little fruit and vegetables, and 87.27% did not participate in physical activity for 30 minutes. In the last 12 months, there was a high incidence of dental and oral health issues among students without symptoms. It was concluded that the most dominant risk behavior for non- communicable disease correlated with poor diet related to food consumption and lack of physical activity. All students had no symptoms or no doctor's diagnosis, but students experienced oral health problem within 12 months. A healthy diet, regular exercise, and good oral hygiene can reduce the risk of NCDs and dental and oral diseases.

Marital violence in the focus of sociological research

The article analyzes the phenomenon of marital violence. The empirical object of the study is the population of the Republic of Mordovia. The purpose of the study is to assess the current situation and identify the main factors and causes of domestic violence against spouses. The authors consider the types and forms of marital violence, the level and frequency of abuse, and the determinants of family violence. As part of the sociological research, a survey of residents aged 18 and older was conducted. The sample size was 384 people, the representative features were gender, age, place of residence. The gender and age structure of the respondents corresponds to the structure of the region's population. A quantitative method was used as a tool for collecting primary information — an individual face-to-face interview at the respondent's place of residence using a paper questionnaire (PAPI) and a CAWI survey using an interactive questionnaire in the proportion of 30 to 70 %, respectively. It was revealed that more than half of the residents have not experienced domestic violence and categorically deny spousal violence, considering it unacceptable and unacceptable. It is determined marital violence in most cases manifests itself in various forms of mental violence: withholding, verbal aggression, aggressive dominant behavior, manifested in a ban on communication with friends or girlfriends. Economic abuse manifests itself in the infringement of the opportunity to purchase clothes, food and have personal running expenses. Physical and sexual violence is less common between spouses and partners. Based on the study, it was found that marital violence is caused by subjective factors (family interaction practices, financial status, and alcohol consumption) that contribute to the reproduction and spread of abuse

The chemistry between us: Illuminating complementarity patterns in interpersonal role-play assessment via moment-to-moment analyses.

In assessment and selection, organizations often include interpersonal interactions because they provide insights into candidates' interpersonal skills. These skills are then typically assessed via one-shot, retrospective assessor ratings. Unfortunately, the assessment of interpersonal skills at such a trait-like level fails to capture the richness of how the interaction unfolds at the behavioral exchange level within a role-play assessment. This study uses the lens of interpersonal complementarity theory to advance our understanding of interpersonal dynamics in role-play assessment and their effects on assessor ratings. Ninety-six MBA students participated in four different flash role-plays as part of diagnosing their strengths and weaknesses. Apart from gathering assessor ratings and criterion measures, coders also conducted a fine-grained examination of how the behavior of the two interaction partners (i.e., MBA students and role-players) unfolded at the moment-to-moment level via the Continuous Assessment of Interpersonal Dynamics (CAID) measurement tool. In all role-plays, candidates consistently showed mutual adaptations in line with complementarity principles: Affiliative behavior led to affiliative behavior, whereas dominant behavior resulted in docile, following behavior and vice versa. For affiliation, mutual influence also occurred in that both interaction partners' temporal trends in affiliation were entrained over time. Complementarity patterns were significantly related to ratings of in situ (role-playing) assessors but not to ratings of ex situ (remote) assessors. The effect of complementarity on validity was mixed. Overall, this study highlights the importance of going beyond overall ratings to capture behavioral contingencies such as complementarity patterns in interpersonal role-play assessment. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Experimental Research on the Proppant Settling and Transport Characteristics of Silica Gel-Based Fracturing Fluid

Summary Hydraulic fracturing is an effective stimulation method to establish high-conductivity channels in tight reservoirs, and the effectiveness of man-made fractures largely depends on the proppant-carrying capacity of the fracturing fluids used. As a novel completion fluid, silica gel-based fracturing fluids have shown desirable stimulation effect in application cases, but a comprehensive evaluation of their proppant settling and transport behaviors in the laboratory remains lacking. In this paper, a silica gel-based fracturing fluid was prepared first, and then the rheological properties, including shear thinning, recovery behavior, and viscoelasticity of the fluid system, were measured. Afterward, the settling velocity of single-particle proppant and the settling rate of multiparticle proppant under various experimental conditions were investigated in the static fluid system; in addition, the dynamic proppant-carrying performance was evaluated using a visualized rough fracture model to study different factors on the dune distribution inside the fractures. Lastly, the proppant-carrying mechanism of silica gel-based fracturing fluid was revealed in three aspects. The rheological test result showed that the shear viscosity of silica gel-based fracturing fluid increased as the SiO2 concentration increased. Furthermore, all tested fluid samples exhibited an elastic modulus that is consistently greater than the viscous modulus, indicating that the silica gel-based fracturing fluid system has a dominant elastic response behavior. In the single-particle static settling test, there was a significant increase in the settling velocities as the particle diameter increased and as the temperature increased. Meanwhile, the settling rate of multiparticles showed a decreasing trend with the increase in mesh size, while the proppant settling rate gradually increased as the proppant concentration rose. The results of dynamic proppant-carrying experiments demonstrate that a higher pumping rate leads to an extended migration distance for proppant, resulting in formed sand dunes with reduced height within fractures. Conversely, an increase in proppant concentration and a reduction in mesh size tend to form higher sand dunes. The proppant-carrying mechanisms of the silica gel-based fracturing fluid relate to the self-polymerization and syneresis of silica gel, the noticeable elasticity characteristics, and the structural encapsulation effect formed between silica gel and proppant. A better understanding of the proppant settling and transport behaviors of silica gel-based fracturing fluid can be helpful in optimizing the hydraulic fracturing design and promoting field application.

External factors affecting the linear and nonlinear rheological behavior of oleogel-based emulsions

This study reported oleogel-based emulsions (OGEs, W/O) stabilized by carnauba wax. The effects of different external factors (heating temperature, crystallization temperature, and shear application during crystallization) on the microstructure and linear/nonlinear rheological properties of OGEs were investigated. Microstructural observation suggested that the OGEs had a uniform droplet distribution, and the carnauba wax crystals trapped oil in the continuous phase. The gelatinized oil phase allowed the OGEs to have a solid appearance and typical yielding behavior. The small amplitude oscillation shear analysis showed that lower heating temperature, higher crystallization temperature, and suitable shear application resulted in a stronger, more stable, and tighter packed network structure and better resistance to deformation of the OGEs. For nonlinear behavior, the elastic dominant behavior of OGEs transformed into viscous dominant behavior at large strain amplitudes, accompanied by more energy dissipation, strain stiffening, and a transition from shear thickening to shear thinning.

Self-Assembly of Symmetric Copolymers in Slits with Inert and Attractive Walls.

Although the behavior of the confined semi-dilute solutions of self-assembling copolymers represents an important topic of basic and applied research, it has eluded the interest of scientists. Extensive series of dissipative particle dynamics simulations have been performed on semi-dilute solutions of A5B5 chains in a selective solvent for A in slits using a DL-MESO simulation package. Simulations of corresponding bulk systems were performed for comparison. This study shows that the associates in the semi-dilute bulk solutions are partly structurally organized. Mild steric constraints in slits with non-attractive walls hardly affect the size of the associates, but they promote their structural arrangement in layers parallel to the slit walls. Attractive walls noticeably affect the association process. In slits with mildly attractive walls, the adsorption competes with the association process. At elevated concentrations, the associates start to form in wide slits when the walls are sparsely covered by separated associates, and the association process prevents the full coverage of the surface. In slits with strongly attractive walls, adsorption is the dominant behavior. The associates form in wide slits at elevated concentrations only after the walls are completely and continuously covered by the adsorbed chains.

Unsteady Flow Structure of Corner Separation in a Highly Loaded Compressor Cascade

Abstract Corner separation is an inherently unsteady flow feature in an axial compressor cascade, and it significantly affects the aerodynamic performance of compressors. The flow field of a highly loaded compressor cascade at the Mach number of 0.59 under the moderate separation condition is simulated based on delayed detached eddy simulation. Comparisons of averaged flow field and transient flow field show that the three-dimensional corner separation flow is highly unsteady and composed of fine-scale vortex structures. The classical recognition of corner separation structures is a consequence of time-averaging. To better understand the contribution of unsteady structures to the averaged flow structures, the evolutions of flow fields in time series and the power spectrums are analyzed. A dominant periodic flow fluctuation is caused by the development of separating vortices with a characteristic frequency around 3500 Hz or at a Strouhal number of 0.75. Further, energy scales and spatiotemporal features of these dominant unsteady behaviors are analyzed using proper orthogonal decomposition and dynamic mode decomposition methods. Results show that the low-frequency behaviors mainly caused by the passage vortex at lower-span regions govern large-scale changes of separation flow in size and intensity and act with certain intermittency. The vortex developing mode around 3500 Hz prevails at higher regions affected by the concentrated shedding vortex. As the separating vortices dissipate approaching the midspan, the effect of the vortex developing mode on axial velocity fluctuation is reduced, although it dominates the pressure fluctuation with good stability in the whole passage.

Uptake mechanism, translocation, and transformation of organophosphate esters in water hyacinth (Eichhornia crassipes): A hydroponic study

Owing to their dominant wastewater origin, bioavailability, and toxicity, the occurrence and behavior of organophosphate esters (OPEs) in aquatic systems have attracted considerable attention over the past two decades. Aquatic plants can accumulate and metabolize OPEs in water, thereby playing an important role in their behavior and fate in waterbodies. However, their uptake, translocation and transformation mechanisms in plants remain incompletely characterized. We investigated the accumulation and transformation of OPEs in water hyacinth (Eichhornia crassipes) through a series of hydroponic experiments using three representative OPEs, tris(2-chloroethyl) phosphate (TCEP), tris(2-butoxyethyl) phosphate (TBEP), and triphenyl phosphate (TPP). These OPEs can not only be adsorbed onto and enter plant roots via passive diffusion pathways, which are facilitated by anion channels and/or aquaporins, but also can return to the solution when concentration gradients exist. After entry, hydrophilic TCEP showed a dominant distribution in the cell sap, strong acropetal transportability, and rapid translocation rate, whereas hydrophobic TPP was mostly retained in the root cell wall and therefore demonstrated weak acropetal transportability; TBEP with moderate hydrophilicity remained in the middle. All these OPEs can be transformed into diesters, which presented higher proportions in the cell sap and therefore have stronger acropetal transferability than their parent OPEs. TCEP exhibits the lowest biodegradability, followed by TPP and TBEP. These OPEs exerted apparent effects on plant growth, photosynthesis, and the diversity and composition of the rhizosphere microbial community.

Computational analysis of hybrid nanoliquid flow over an exponentially elongating sheet influenced by oblique Lorentz force with viscous-Joule dissipation: Role of nanoparticle shape factor

This article mainly examines the influences of an oblique Lorentz force on H2O-based hybrid nanoliquid flow over a over a permeable and exponentially elongating surface embedded in a uniform porous medium. The nanoliquid contains Cu and Al2O3 as suspended nanoparticles of varying shapes (spherical, blade and lamina). Further, the significance of viscous-Joule dissipation, nonlinear thermal radiation, and an internal heat source is also considered. Moreover, Navier’s velocity slip and thermal jump conditions are imposed at the surface boundary. Studying such a fluid flow problem becomes essential because of various industrial devices and technological processes, viz., the production of polymer, manufacturing of food products, metallurgical processes, cooling of electronic chips and solar cells, nuclear power reactors and several other devices like thermistors, glass fiber, electric fuses, gas turbines, etc. A suitable similarity transformation has been utilized to transform the governing set of equations into dimensionless form. The resulting highly nonlinear boundary value problem is solved numerically using Runge–Kutta–Fehlberg formula-based shooting method. In addition, secant iteration is employed to modify the guesses for missing initial conditions. The outcomes of the study are demonstrated and displayed through graphs and tables. Furthermore, a quadratic regression analysis is carried out to illustrate the dominant behavior of the relevant factors on the local drag coefficient and Nusselt number. The angle of inclination of applied magnetic field has the tendency to accelerate the flow. Compared to blade and lamina shapes nanoparticles, nanofluid temperature is higher for spherical nanoparticles.

Steadiness of Coronal Heating

The EUI instrument on the Solar Orbiter spacecraft has obtained the most stable, high-resolution images of the solar corona from its orbit with a perihelion near 0.4 au. A sequence of 360 images obtained at 17.1 nm, between 2022 October 25 19:00 and 19:30 UT, is scrutinized. One image pixel corresponds to 148 km at the solar surface. The widely held belief that the outer atmosphere of the Sun is in a continuous state of magnetic turmoil is pitted against the EUI data. The observed plasma variations appear to fall into two classes. By far the dominant behavior is a very low amplitude variation in brightness (1%) in the coronal loops, with larger variations in some footpoint regions. No hints of observable changes in magnetic topology are associated with such small variations. The larger-amplitude, more rapid, rarer, and less well organized changes are associated with flux emergence. It is suggested therefore that while magnetic reconnection drives the latter, most of the active corona is heated with no evidence of a role for large-scale (observable) reconnection. Since most coronal emission-line widths are subsonic, the bulk of coronal heating, if driven by reconnection, can only be of tangentially discontinuous magnetic fields, with angles below about 0.5c S /c A ∼ 0.3β, with β the plasma beta parameter (∼0.01) and c S and c A the sound and Alfvén speeds, respectively. If heated by multiple small flare-like events, then these must be ≲1021 erg, i.e., picoflares. But processes other than reconnection have yet to be ruled out, such as viscous dissipation, which may contribute to the steady heating of coronal loops over active regions.

Testosterone promotes dominance behaviors in the Ultimatum Game after players’ status increases

Although testosterone is generally considered to promote dominance behaviors, in humans it fosters behaviors appropriate to achieving and maintaining social status, contingent upon the situation. Recent cross-sectional studies, such as Inoue et al. (Sci Rep 7:5335, 2017), have shown that dominance behaviors induced by testosterone are modulated by high status. Yet, it remains ambiguous whether a rise in social status within real-world social groups reshapes the relationship between testosterone and dominance behavior. To investigate this longitudinal question, we added a second wave to Inoue et al.’s study, collecting further data after an interval of 2 years. Members of a university rugby team that adheres to a rigid hierarchical order rooted in seniority played the Ultimatum Game with teammates and provided saliva for assays of testosterone and cortisol. Our analysis reveals that individuals with higher baseline salivary testosterone levels exhibited more dominance as their position in the hierarchy increased according to their seniority.