Double Scaling Research Articles

INVESTIGATION OF THE CURRENT-VOLTAGE CHARACTERISTICS OF THE N-CDS/P-CU(IN, GA)SE2 HETEROSTRUCTURE

In this work, current transfer mechanism in the n-CdS/p-Cu(In, Ga)Se2 heterostructure in the forward and reverse current directions at T=300 K is investigated. It has been established that the dark current-voltage characteristics of heterostructures built on a double logarithmic scale are described by power-law dependences type of the I=Vα. In the forward direction of the current, sections of the current-voltage characteristic were observed: α1=1 (ohmic) and α2=2 (quadratic), and for the reverse section of the current-voltage characteristic: α1=1 (ohmic), α2=0.25. From the quadratic section of the forward branch, the value µn∙τn=4.5∙10-10 cm2/V for the CIGS active layer was determined, which is explained by the processes of recombination of charge carriers through simple local centers.

Validation of the Spanish Version of the Double Knowledge Expectations and Received Knowledge Significant Other Scale for Informal Caregivers of People with Dementia (KESO-DEM/RKSO-DEM).

Dementia is associated with cognitive decline. Becoming an informal caregiver raises questions, requiring information and support from health professionals to guide home care. A multicenter, longitudinal study was carried out to validate the Spanish version of the double scale of expected and received knowledge for informal caregivers of people with dementia (KESO-DEM/RKSO-DEM), the analysis of the dimensional structure of the instrument, its validity and reliability, and temporary stability was carried out. An analysis of criterion and construct validity, internal consistency, and test–retest stability was performed. The evaluation of the interrelation between dimensions was statistically significant. Regarding internal consistency, the scale values were good both for the scale totals and for each dimension of knowledge, with Cronbach’s alpha coefficients of 0.97. For criterion validity, all items showed temporal stability for both questionnaires (p < 0.05). The availability of a valid, reliable tool for the measurement of expected and received knowledge in caregivers of people with dementia allows an approach based on the real needs of the family and the patient. It is important to design care protocols for people with dementia that are adapted to their needs and expectations and to their non-curative treatment, to improve the emotional well-being of patients and informal caregivers.

Sexual Double Standard: a Cross-Cultural Comparison of Young Adults Spanish, Peruvian, and Ecuadorian People

IntroductionThe sexual double standard (SDS) implies men and women are being evaluated differently as regards sexuality. To date, no cross-cultural comparisons have been made regarding the prevalence of the various forms that adherence to SDS takes. This research work describes differences among Spain, Peru, and Ecuador in the prevalence of three different types of adherence to the SDS (egalitarian, man-favorable, and woman-favorable), which refer to sexual freedom and sexual shyness in 18–25-year-old youths.MethodA sample of 2229 heterosexual adults (34.2% Spanish, 33.7% Peruvian, and 32.1% Ecuadorian) answered the Sexual Double Standard Scale. Participants were collected between September 2019 and March 2021.ResultsThe results showed differences between countries, both in the total sample and in the sample of men and women separately, and in conducts related to sexual freedom and sexual shyness. The most prevalent typologies were as follows: the egalitarian typology in Spain, the man-favorable typology in Peru and Ecuador, and the woman-favorable typology in Ecuador.ConclusionThese findings conclude that the socio-structural conditions of how resources are distributed between men and women could be related to the prevalence of different gender-related sexual norms. In those contexts in which the gender-egalitarian sexual norm prevailed, resources were more equally distributed between men and women.Policy ImplicationsIt highlights the role of the socio-structural conditions in the distribution of resources between men and women and the differences between men and women, to understand the cross-cultural differences in the prevalence of SDS adherence types.

Analisis Sistem Akuntansi Penggajian Pegawai Negeri Sipil Pada Dinas Kependudukan Dan Pencatatan Sipil Kabupaten Langkat

The Department of Population and Civil Registration of Langkat Regency is a government agency engaged in population administration and civil registration services. In carrying out their duties, Civil Servants receive a salary for their performance. Matters that include the payroll accounting system are related to employee payroll issues. The method used in this research is descriptive qualitative method where this method only focuses on the civil servant payroll accounting system at Disdukcatpil Langkat Regency. The results in this study show that the payroll accounting system at Disdukcatpil Langkat Regency is good, salary payments are paid regularly every month in accordance with the basic salary obtained along with allowances and deductions. The scale used is a double scale whose salary system is determined not only on the basis of rank but on the results of the work he does and his job responsibilities

Double scaling limit for the O(N)3-invariant tensor model

We study the double scaling limit of the O(N)3-invariant tensor model, initially introduced in Carrozza and Tanasa (2016 Lett. Math. Phys. 106 1531). This model has an interacting part containing two types of quartic invariants, the tetrahedric and the pillow one. For the two-point function, we rewrite the sum over Feynman graphs at each order in the 1/N expansion as a finite sum, where the summand is a function of the generating series of melons and chains (a.k.a. ladders). The graphs which are the most singular in the continuum limit are characterized at each order in the 1/N expansion. This leads to a double scaling limit which picks up contributions from all orders in the 1/N expansion. In contrast with matrix models, but similarly to previous double scaling limits in tensor models, this double scaling limit is summable. The tools used in order to prove our results are combinatorial, namely a thorough diagrammatic analysis of the Feynman graphs, as well as an analytic analysis of the singularities of the relevant generating series.

Perturbation of multi-critical unitary matrix models, double scaling limits, and Argyres-Douglas theories

Using the saddle point method, we give an explicit form of the planar free energy and Wilson loops of unitary matrix models in the one-cut regime. The multi-critical unitary matrix models are shown to undergo third-order phase transitions at two points by studying the planar free energy. One of these ungapped/gapped phase transitions is multi-critical, while the other is not multi-critical. The spectral curve of the k-th multi-critical matrix model exhibits an A4k−1 singularity at the multi-critical point. Perturbation around the multi-critical point and its double scaling limit are studied. In order to take the double scaling limit, the perturbed coupling constants should be fine-tuned such that all the zero points of the spectral curve approach to the A4k−1 singular point. The fine-tuning is examined in the one-cut regime, and the scaling behavior of the perturbed couplings is determined. It is shown that the double scaling limit of the spectral curve is isomorphic to the Seiberg-Witten curve of the Argyres-Douglas theory of type (A1,A4k−1).

Study of Sexual Concordance in Men and Women with Different Typologies of Adherence to the Sexual Double Standard

Background/ObjectiveSexual concordance (i.e., relationship between genital response and subjective sexual arousal) is higher in men than in women. Among the factors that could explain this difference would be the sexual double standard (SDS). Sexual concordance is examined by SDS typologies of adherence (egalitarian, man-favorable, and woman-favorable). MethodDuring exposure to a film with sexual content, genital response (penile circumference/vaginal pulse amplitude) and self-reported sexual arousal were recorded in 104 young adults (42 men and 62 women), distributed into SDS typologies of adherence on the basis of their scores on the Sexual Double Standard Scale. ResultsSexual concordance was obtained in men and women with egalitarian and man-favorable typology. Subjective sexual arousal explained a significant percentage of the variance in genital response in the egalitarian typology (men: R2 = .32, p < .01; women: R2 = .19, p < .05) and man-favorable typology (men: R2 = .21, p < .05; women: R2 = .23, p < .05). ConclusionsAgreement between genital responsiveness and subjective sexual arousal depends on DES adherence typology.

Assessment of the size selectivity of peritoneal permeability by the restriction coefficient to protein transport.

Transport of serum proteins from the circulation to peritoneal dialysate in peritoneal dialysis patients mainly focused on total protein. Individual proteins have hardly been studied. We determined serum and effluent concentrations of four individual proteins with a wide molecular weight range routinely in the standardised peritoneal permeability analysis performed yearly in all participating patients. These include β2-microglobulin, albumin, immunoglobulin G and α2-macroglobulin. The dependency of transport of these proteins on their molecular weight and diffusion coefficient led to the development of the peritoneal protein restriction coefficient (PPRC), which is the slope of the relation between the peritoneal clearances of these proteins and their free diffusion coefficients in water, when plotted on a double logarithmic scale. The higher the PPRC, the more size restriction to transport. In this review, we discuss the results obtained on the PPRC under various conditions, such as effects of various osmotic agents, vasoactive drugs, peritonitis and the hydrostatic pressure gradient. Long-term follow-up of patients shows an increase of the PPRC, the possible causes of which are discussed. Venous vasculopathy of the peritoneal microcirculation is the most likely explanation.

De Sitter space as a BRST invariant coherent state of gravitons

The $S$-matrix formulation indicates that a consistent embedding of the de Sitter state in quantum gravity is possible exclusively as an excited quantum state constructed on top of a valid $S$-matrix vacuum such as the Minkowski vacuum. In the present paper we offer such a construction of the de Sitter state in the form of a coherent state of gravitons. Unlike previous realizations of this idea, we focus on BRST invariance as the guiding principle for physicality. In order to establish the universal rules of gauge consistency, we study the BRST-invariant construction of coherent states created by classical and quantum sources in QED and in linearized gravity. Introduction of $N$ copies of scalar matter coupled to gravity allows us to take a special double scaling limit, a so-called species limit, in which our construction of the de Sitter state becomes exact. In this limit, the irrelevant quantum gravitational effects vanish, whereas the collective phenomena, such as Gibbons-Hawking radiation, are calculable.

Somatic embryogenesis from flower tepals of Hippeastrum aiming regeneration of virus-free plants

Hippeastrum hybridum is an important bulbous flower plant in world floriculture, which are propagated conventionally by the technique known as double or twin scales to obtain plants with clonal origin. However, this technique promotes the propagation of systemic diseases, particularly mosaic-inducing viruses. The aim of this paper was to evaluate the somatic embryogenesis (SE) from tepals as an alternative to provide a technique for SE induction and to obtaining virus-free plantlets of Hippeastrum from infected plants. The concentrations of 2,4-Dichlorofenoxiacetic Acid (2,4-D) and thidiazuron (TDZ) was evaluated in SE induction pathway. The monitoring of viruses during the assays with tepals was performed by Reverse Transcription-Polymerase Chain Reaction. SE induction was obtained, for the first time, in tepal segments from flower buds of Hippeastrum. The 2,4-D was the main factor for embryogenic callus induction, and TDZ increased the SE induction rate. However, conversion of somatic embryos into plantlets were only developed in free-2,4-D media, replaced by 1.0 mg L−1 6-Benziladenine. Out of five virus species monitored during the experiment, Cucumber mosaic virus was detected in tepals and Hippeastrum mosaic virus in leaves of donor plants. The SE-derived plantlets that germinated in vitro were acclimatized and tested negative for all viruses assayed.

A comparison of non-experts and experts using DSIS method

Subjective evaluations are necessary to learn how expected viewers perceive the quality of a system. Traditionally, non-expert subjective tests are preferred rather than expert tests. In this study, we conducted subjective evaluation experiments for non-experts and experts on compressed 8K videos using the double stimulus impairment scale (DSIS) method and analyzed the experimental results expressed in terms of the mean opinion score (MOS), which is the average of individual scores. Furthermore, we investigated the differences between non-experts and experts by considering a new method in P.913 that estimates an improved MOS and a new experimental method using experts, called expert viewing protocol (EVP). Our contribution shows advantages of conducting expert subjective tests, such as EVP: expert tests allow to perform experiments with fewer subjects, to distinguish between original and distorted images, to determine a lower threshold for the image quality, to distribute scores in an appropriate range, and to constantly gain MOS values equal to improved MOS values.

Joint Estimation of SOC and Available Capacity of Power Lithium-Ion Battery

Temperature has an important effect on the battery model. A dual-polarization equivalent circuit model considering temperature is established to quantify the effect of temperature, and the initial parameters of the model are identified through experiments. To solve the defect of preset noise, the H-infinity filter algorithm is used to replace the traditional extended Kalman filter algorithm, without assuming that the process noise and measurement noise obey Gaussian distribution. To eliminate the influence of battery aging on SOC estimation, and considering the different time-varying characteristics of the battery states and parameters, the dual time scale double H-infinity filter is used to jointly estimate the revised SOC and available capacity. The simulation results at two temperatures show that, compared with the single time scale, the double time scale double H-infinity filter reduces the simulation time by nearly 90% under the premise that the accuracy is almost unchanged, which proves that the proposed joint estimation algorithm has the dual advantages of high precision and high efficiency.

Deterministic Identification Over Channels With Power Constraints

The deterministic identification (DI) capacity is developed in multiple settings of channels with power constraints. A full characterization is established for the DI capacity of the discrete memoryless channel (DMC) with and without input constraints. Originally, Ahlswede and Dueck established the identification capacity with local randomness at the encoder, resulting in a double exponential number of messages in the block length <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$n$ </tex-math></inline-formula> . In the deterministic setup, the number of messages scales exponentially, as in Shannon’s transmission paradigm, but the achievable identification rates are higher. An explicit proof was not provided for the deterministic setting. In this paper, a detailed proof is presented for the DMC. Furthermore, Gaussian channels with fast and slow fading are considered, when channel side information is available at the decoder. A new phenomenon is observed as we establish that the number of messages scales as <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2^{n\log (n)R}$ </tex-math></inline-formula> by deriving lower and upper bounds on the DI capacity on this scale. Consequently, the DI capacity of the Gaussian channel is infinite in the exponential scale and zero in the double exponential scale, regardless of the channel noise.

Infrared Image Target Detection Algorithm by Local Contrast Saliency with Double Scale for Positive and Negative Contrast Target

Infrared Image Target Detection Algorithm by Local Contrast Saliency with Double Scale for Positive and Negative Contrast Target

Deterministic and probabilistic buckling response of fiber–metal laminate panels under uniaxial compression

PurposeThe purpose of this paper is to study the deterministic elastic buckling behavior of cylindrical fiber–metal laminate panels subjected to uniaxial compressive loading and the investigation of GLAss fiber-REinforced aluminum laminate (GLARE) panels using probabilistic finite element method (FEM) analysis.Design/methodology/approachThe FEM in combination with the eigenvalue buckling analysis is used for the construction of buckling coefficient–curvature parameter diagrams of seven fiber–metal laminate grades, three glass-fiber composites and monolithic 2024-T3 aluminum. The influences of uncertainties concerning material properties and laminate dimensions on the buckling load are studied with sensitivity analyses.FindingsIt is found that aluminum has a stronger impact on the buckling behavior of the fiber–metal laminate panels than their constituent uni-directional or woven composites. For the classical simply supported boundary conditions, it is found that there is an approximately linear relation between the buckling coefficient and the curvature parameter when the diagrams are plotted in double logarithmic scale. The probabilistic calculations demonstrate that there is a considerable probability to overestimate the buckling load of GLARE panels with deterministic calculations.Originality/valueIn this study, the deterministic and probabilistic buckling response of fiber metal laminate panels is investigated. It is shown that realistic structural uncertainties could substantially affect the buckling strength of aerospace components.

How to Draw a Correlation Function

We discuss connection between the XX0 Heisenberg spin chain and some aspects of enumerative combinatorics. The representation of the Bethe wave functions via the Schur functions allows to apply the theory of symmetric functions to the calculation of the correlation functions. We provide a combinatorial derivation of the dynamical auto-correlation functions and visualise them in terms of nests of self-avoiding lattice paths. Asymptotics of the auto-correlation functions are obtained in the double scaling limit provided that the evolution parameter is large.

The semiclassical gravitational path integral and random matrices (toward a microscopic picture of a dS2 universe)

We study the genus expansion on compact Riemann surfaces of the gravitational path integral {mathcal{Z}}_{mathrm{grav}}^{(m)} in two spacetime dimensions with cosmological constant Λ > 0 coupled to one of the non-unitary minimal models ℳ2m − 1, 2. In the semiclassical limit, corresponding to large m, {mathcal{Z}}_{mathrm{grav}}^{(m)} admits a Euclidean saddle for genus h ≥ 2. Upon fixing the area of the metric, the path integral admits a round two-sphere saddle for h = 0. We show that the OPE coefficients for the minimal weight operators of ℳ2m − 1, 2 grow exponentially in m at large m. Employing the sewing formula, we use these OPE coefficients to obtain the large m limit of the partition function of ℳ2m − 1, 2 for genus h ≥ 2. Combining these results we arrive at a semiclassical expression for {mathcal{Z}}_{mathrm{grav}}^{(m)} . Conjecturally, {mathcal{Z}}_{mathrm{grav}}^{(m)} admits a completion in terms of an integral over large random Hermitian matrices, known as a multicritical matrix integral. This matrix integral is built from an even polynomial potential of order 2m. We obtain explicit expressions for the large m genus expansion of multicritical matrix integrals in the double scaling limit. We compute invariant quantities involving contributions at different genera, both from a matrix as well as a gravity perspective, and establish a link between the two pictures. Inspired by the proposal of Gibbons and Hawking relating the de Sitter entropy to a gravitational path integral, our setup paves a possible path toward a microscopic picture of a two-dimensional de Sitter universe.

Emergent unitarity in de Sitter from matrix integrals

We study Jackiw-Teitelboim gravity with positive cosmological constant as a model for de Sitter quantum gravity. We focus on the quantum mechanics of the model at past and future infinity. There is a Hilbert space of asymptotic states and an infinite-time evolution operator between the far past and far future. This evolution is not unitary, although we find that it acts unitarily on a subspace up to non-perturbative corrections. These corrections come from processes which involve changes in the spatial topology, including the nucleation of baby universes. There is significant evidence that this 1+1 dimensional model is dual to a 0+0 dimensional matrix integral in the double-scaled limit. So the bulk quantum mechanics, including the Hilbert space and approximately unitary evolution, emerge from a classical integral. We find that this emergence is a robust consequence of the level repulsion of eigenvalues along with the double scaling limit, and so is rather universal in random matrix theory.

The Hankel Determinants from a Singularly Perturbed Jacobi Weight

We study the Hankel determinant generated by a singularly perturbed Jacobi weight w(x,s):=(1−x)α(1+x)βe−s1−x,x∈[−1,1],α&gt;0,β&gt;0s≥0. If s=0, it is reduced to the classical Jacobi weight. For s&gt;0, the factor e−s1−x induces an infinitely strong zero at x=1. For the finite n case, we obtain four auxiliary quantities Rn(s), rn(s), R˜n(s), and r˜n(s) by using the ladder operator approach. We show that the recurrence coefficients are expressed in terms of the four auxiliary quantities with the aid of the compatibility conditions. Furthermore, we derive a shifted Jimbo–Miwa–Okamoto σ-function of a particular Painlevé V for the logarithmic derivative of the Hankel determinant Dn(s). By variable substitution and some complicated calculations, we show that the quantity Rn(s) satisfies the four Painlevé equations. For the large n case, we show that, under a double scaling, where n tends to ∞ and s tends to 0+, such that τ:=n2s is finite, the scaled Hankel determinant can be expressed by a particular PIII′.

Theory space of one unitary matrix model and its critical behavior associated with Argyres–Douglas theory

The lowest critical point of one unitary matrix model with cosine plus logarithmic potential is known to correspond with the [Formula: see text] Argyres–Douglas (AD) theory and its double scaling limit derives the Painlevé II equation with parameter. Here, we consider the critical points associated with all cosine potentials and determine the scaling operators, their vacuum expectation values (vevs) and their scaling dimensions from perturbed string equations at planar level. These dimensions agree with those of [Formula: see text] AD theory.