Two-Dimensional Numerical Analysis of Non-Darcy Flow Using the Lattice Boltzmann Method: Pore-Scale Heterogeneous Effects

This study simulates pore-scale two-dimensional flows through porous media composed of circular grains with varied pore-scale heterogeneity to analyze non-Darcy flow effects on different types of porous media using the lattice Boltzmann method. The magnitude of non-Darcy coefficients and the critical Reynolds number of non-Darcy flow were computed from the simulation results using the Forchheimer equation. Although the simulated porous materials have similar porosity and representative grain diameters, larger non-Darcy coefficients and an earlier onset of non-Darcy flow were observed for more heterogeneous porous media. The simulation results were compared with existing correlations to predict non-Darcy coefficients, and the large sensitivity of non-Darcy coefficients to pore-scale heterogeneity was identified. The pore-scale heterogeneity and resulting flow fields were evaluated using the participation number. From the computed participation numbers and visualized flow fields, a significant channeling effect for heterogeneous media in the Darcy flow regime was confirmed compared with that for homogeneous media. However, when non-Darcy flow occurs, this channeling effect was alleviated. This study characterizes non-Darcy effect with alleviation of the channeling effect quantified with an increase in participation number. Our findings indicate a strong sensitivity of magnitude and onset of non-Darcy effect to pore-scale heterogeneity and imply the possibility of evaluating non-Darcy effect through numerical analysis of the channeling effect.

Aplicación de un modelo de competitividad para las zonas francas permanentes en Colombia

This article aims to show the importance of determining the level of competitiveness of the Permanent Free Trade Zones (PFTZ) in Colombia, from the applicability of a business competitiveness model that seeks to analyze their competitive potential and establish strategies for the optimal development in this sector. A diagnosis of the permanent free trade zones in Colombia was carried out, in which aspects such as: the subsectors in which the free trade zones are focused, percentage of participation, number of industrial users of goods or services, promotion of free trade zones through electronic means, types of certifications they have, among others; Immediately afterwards, the Business Competitiveness Model of Manuel Humberto Jiménez was applied to 10 PFTZ of Colombia, which allowed determining the level of competitiveness of these, it should be noted that for the application of the model, a questionnaire of 22 questions was designed that were applied to some of the senior managers ...

Effective Number Theory: Counting the Identities of a Quantum State

Quantum physics frequently involves a need to count the states, subspaces, measurement outcomes, and other elements of quantum dynamics. However, with quantum mechanics assigning probabilities to such objects, it is often desirable to work with the notion of a “total” that takes into account their varied relevance. For example, such an effective count of position states available to a lattice electron could characterize its localization properties. Similarly, the effective total of outcomes in the measurement step of a quantum computation relates to the efficiency of the quantum algorithm. Despite a broad need for effective counting, a well-founded prescription has not been formulated. Instead, the assignments that do not respect the measure-like nature of the concept, such as versions of the participation number or exponentiated entropies, are used in some areas. Here, we develop the additive theory of effective number functions (ENFs), namely functions assigning consistent totals to collections of objects endowed with probability weights. Our analysis reveals the existence of a minimal total, realized by the unique ENF, which leads to effective counting with absolute meaning. Touching upon the nature of the measure, our results may find applications not only in quantum physics, but also in other quantitative sciences.

Properties of Normal Modes in a Modified Disordered Klein-Gordon Lattice: From Disorder to Order

We introduce a modified version of the disordered Klein-Gordon lattice model, having two parameters for controlling the disorder strength: D, which determines the range of the coefficients of the on-site potentials, and W, which defines the strength of the nearestneighbor interactions. We fix W = 4 and investigate how the properties of the system's normal modes change as we approach its ordered version, i.e. D → 0. We show that the probability density distribution of the normal mode's frequencies takes a 'U'-shaped profile as D decreases. Furthermore, we use two quantities for estimating the mode's spatial extent, the so-called localization volume V (which is related to the mode's second moment) and the mode's participation number P. We show that both quantities scale as ∝ D−2 when D approaches zero and we numerically verify a proportionality relation between them as V/P ≈ 2.6.

Peculiarities in Understanding of Indirect Meaning of Proverbs and Idioms by Children of Pre-School Age

The study reveales psycholinguistic peculiarities of understanding of indirect meaning of the proverbs and idioms of Ukrainian speaking pre-school children. The experiment took place on the basis of pre-school education establishments of Ukraine. The participation number is 378 children at the age of 5 years (till 5.5 years). The used psycholinguistic methods are: а) «evaluation of understanding of the indirect metaphors meaning» (Vygotskyi, 2000); b) «evaluation of proverbs understanding» (Luriia, 1998). The other used psycholinguistic methods are: а) «Proverbs understanding» (Luriia, 1998), adopted for the diagnoses of metaphoric understanding of idioms meaning by children; b) «The interpretation choice of one of the given variants of meanings» (Baskakova & Glukhov, 2008; Eliseeva, Gutsc & Marini, 2017); c) selection of one of several possible paraphrases (Winner, Rosenstiel & Gardner, 1976; Vosniadou & Ortony, 1983). Children were proposed to express themselves in order to find out how they understand given proverbs and idioms. If they had difficulties in meaning explication, so they were proposed some variants of proverbs and idioms interpretations, among which the first was correct (with indirect meaning) and the second with the direct meaning and the third with occasional associative meaning. The experiment proved such results: there are children with obvious intuitive language ability to feel the general meaning of proverbs and idioms. The part of children of the age of five years is able to verbalize the indirect proverb meaning (4,2%) and idioms meaning (7,4%). In the situation with one variant of meaning among some paraphrases 16,4% of children chose the correct proverb meaning, 20,4% of children chose the correct idiom meaning. More difficult for children’s understanding are proverbs, than idioms. It could be explained in the way, that idiomatic expressions are one whole and one nomination that a child often interprets in daily life from adults in some specific life situations. That is why he or she uses more quickly the heard word complex in a new association chain, abstracting from the direct meaning of idiomatic words. The proverb understanding is seen by child as more complex cognitive task, which foresees decipherment of the common thought or conclusion, understanding its meaning (implication). That is why the proverbs cause more problems among children than idioms.

Pendidikan Perspektif Gender Di Indonesia (Menimbang dan Menakar Peran Gender dalam Pendidikan)

<p>The development of education in Indonesia in its growth, have shown repair symptom from time to time, but society view about gender in reality is can not be changed and altered quickly. The strength of value system and culture construction which not represent gender equality yet is have an effect to school education pattern. Participation number, graduation number, majors choices, and possibility acces to work after graduate from school express how highly awareness of society about the important of gender equality. As long as culture construction of society still differentiate the role and the position of man and woman, as long as also its influence to form and pattern of school education. Perhaps need long time to fight for gender equality and justice in education.</p><p> </p><p>Pembangunan pendidikan di Indonesia dalam perkembangannya, telah menampakkan gejala perbaikan dari waktu ke waktu, namun pandangan masyarakat terhadap gender ternyata tidak begitu cepat dapat berubah dan diubah. Kuatnya sistem nilai dan konstruk budaya yang belum merepresentasikan kesetaraan gender turut berpengaruh terhadap pola pendidikan persekolahan. Angka partisipasi, angka kelulusan, pilihan jurusan dan program studi, serta kemungkinan akses terhadap pekerjaan setelah tamat dari sekolah mencerminkan seberapa tinggi kesadaran masyarakat mengenai perlunya kesetaraan gender. Sepanjang konstruk budaya masyarakat masih membedakan peran dan posisi anak laki-laki dan perempuan, sepanjang itu pula pengaruhnya terhadap bentuk dan pola pendidikan persekolahan. Barangkali butuh waktu panjang untuk memperjuangkan kesetaraan dan keadilan gender dalam pendidikan</p>

UPAYA PENINGKATAN ANGKA PARTISIPASI PESERTA DIDIK MELALUI PROGRAM SOSIALISASI TERPADU

inwrought socialization program execution in this watchfulness achieve aim or target that appointed, because this program applications effectively proved give impact and influence enough significant towards entrant participation number enhanced educates at sd source country dumpyong 1 regency bondowoso. this program must then be carried out chronically so that government program in order to speed up obligatory successful learn education base 9 year complete

Disorder–order transitions in diluted and nondiluted direct transmission lines with asymmetric dichotomous noise

In this work we study the localization properties of diluted and nondiluted disordered direct transmission lines (TLs), when we distribute two values of inductances, LA and LB, according to an asymmetric dichotomous sequence. Using the scaling properties of the participation number D we study the localization properties in the thermodynamic limit. For certain τ and β parameter specific values, which characterize the dichotomous noise, we have found the following limit conditions: lim β→∞m(ω,τ,β) → 1.0 or lim τ→∞m(ω,τ,β) → 1.0, for the appearing of the disorder–order transitions. Here m(ω,τ,β) are the slopes of the linear relationships between ln (D) and ln (N). In addition, in each ωc resonance frequency generated by the dilution process we demonstrate the existence of extended intermediate states in the thermodynamic limit.