Dimensions Of Quantities Research Articles

The Specter of Dwindling Numbers: Population Quantity and Jewish Biopolitics in the United States

AbstractOver the last three decades, the organized American-Jewish community has preoccupied itself with sociodemographic concerns regarding maintenance of a viable Jewish life in the United States. In this article, I study a key dimension of this preoccupation with population trends: the quantity of the Jewish population, that is, the number of Jews. I show the centrality of this dimension in shaping a cluster of anxious discourses and interventionist engagements directed toward stemming numerical decline. Analyzing this policy world in terms of a “Jewish biopolitics,” I assess how the voluntary nature of American Jewry has shaped a distinct biopolitical field, reliant on “making Jews” by both biological and cultural reproduction, enmeshing dimensions of quantity and quality. Juxtaposing this Jewish biopolitical engagement with the one exercised by the Israeli state, I flesh out broader considerations and contributions, and introduce the exploratory concept of “minority community biopolitics.” The article is grounded in an anthropological study of policy, including fieldwork, interviews, and a review of the flurry of archival and public materials related to the topic.

Energy use, industrial soot and vehicle exhaust pollution—China's regional air pollution recognition, performance decomposition and governance

The identification of “industrial soot” or “vehicle exhaust” pollution facilitates developing proper measures for the mitigation of regional air pollution. In order to identify the pollution types at a regional level, this paper applies the Luenberger productivity indicator to decompose air pollutant emissions performance. Furthermore, we simultaneously consider pollution rates and the productivity change. Thus, we propose a new modeling framework allowing for the variable-specific decomposition of the environmental performance along time and quantity dimensions to identify the underlying patterns. The panel data for 30 provinces and autonomous regions are then applied to identify regional atmospheric pollution type. The results show that SO2 emission from industrial soot and NOx emissions from vehicle exhaust constitute an important source of regional atmospheric environmental inefficiency, though the former seems to be more decisive. The southeast coastal provinces showed generally lower levels of inefficiency, compared to the northwest inland area. During the period of the 11th Five-Year Plan of China, industrial SO2 emission performance contributed to the increase in the atmospheric environmental productivity, while traffic NOx emissions acted as a negative factor in this regard. Therefore, the government should seek to increase the intensity of environmental regulation in transportation sector. At the country level, technical progress associated with both types of pollutions was positive and thus exceed the negative efficiency change for the same variables. In particular, in Beijing-Tianjin-Hebei region, the productivity changes in industrial SO2 emissions and traffic NOx emissions indicate a “stably advancing” type. The results further indicate that there are 18 provinces of China which have experienced mixed-type pollution. Jilin and Hainan were classified as provinces experiencing vehicle exhaust gas pollution, whereas Guizhou was defined as that subject to industrial soot pollution. The government should formulate and implement diversified support and regulation policies to govern SO2 and NOx pollution at the regional level.

Model Reference Adaptive System-Based Sensorless Speed Control of Grid-Connected Doubly Fed Induction Generator in Wind Energy Conversion System

This paper presents a speed sensorless method for the vector control of grid-connected doubly fed induction generator (DFIG) in wind energy conversion system. The sensorless method is based on the model reference adaptive system (MRAS) which utilizes instantaneous and steady-state values of a fictitious ohmic quantity (R), respectively. The dimension of this fictitious quantity is ohm (Ω) that has no physical significance. The sensorless scheme, R-MRAS does not require any estimation of flux and is also independent of stator/rotor resistances. A detailed simulation study, in this regard, is done in MATLAB/Simulink. The simulated results are also verified experimentally by a dSPACE-1103-based DFIG-DC machine laboratory prototype.

1013 Population Study Of Sleep Duration And Quality Using Data From Commercially Available Wearable Ring

Sleep is one of the main pillars of our health and wellbeing. Both short and long duration of sleep has been associated with obesity, diabetes, hypertension and cardiovascular diseases and even with greater risk of death. Nevertheless, the duration of the sleep is not the only quantity affecting the perceived quality of sleep but it can be divided into dimensions of quantity, continuity and timing. While continuity and timing are not well studied possibly due the difficulty of assessing them with questionnaires, the recent development of wearable and environmental sleep trackers can enable more versatile analysis of all these three dimensions. Thus, in this study sleep duration as well as the role of sleep consistency as contributor of sleep quality, are assessed in real-life settings. The data set consists of sleep data from the first Oura ring users where the studied metrics included overall sleep duration, long-term consistency vs sleep efficiency, and long-term consistency vs total sleep. To be included into this population a user needed at least 10 recorded nights available constituting a population of 9333 persons and including approximately 1.8 million nights. 50% of the population slept, on average, less than 7.0 hours per night. Moreover, lack of long-term sleep consistency was found to correlate with shorter sleep duration and lower sleep efficiency. It was shown that wearable Oura ring can be utilized in large population studies to reveal facts related to sleep duration. The link between the consistency of sleep timing could be studied. On average, half of the Oura users were observed to accumulate insufficient amount of sleep compared to NSF recommendations. Moreover, lack of consistency in sleep timing was found to correlate with shorter sleep duration and lower sleep efficiency. We therefore conclude that further experimentation to explore the potential of the Oura ring for tracking human sleep in large scale studies is justified. This work was supported by Oura Health Ltd.

Determination of the smoothing ability of the vibration mixer on the basis of the correlation analysis

Now the increasing popularity is received by food semi-finished products from the bulk materials. With increase in volume of their production it is expedient to mix powdery materials in the mixers of continuous action. For the set working hours of the mixers of continuous action the movement of material in the device is considered to be casual stationary processes between which there is relationship of cause and effect. Key indicators for her assessment is the correlation coefficient, population mean and dispersion. Communication between entering and going out of the device signals is established by means of the equations of material balance, describing expenses of streams of bulk stochastic stationary functions X (t). Further, finding probabilistic characteristics of the entering and leaving signals, it is possible to judge "quality" of operation of the mixer or to select the required topology of streams in the hardware environment by comparison of the relations of their dispersions or mean square deviations. In this work the scheme of the movement of material streams in the mixer developed by us realizing a method of "consecutive dilution" is considered. By means of the system of the equations of the material balance displaying process of the movement of material in the mixers of continuous action of vibration type influence of recirculation on the smoothing properties of the device is considered. Values of size of the smoothing ability of S from recirculation coefficient ? and quantities of rounds of n are given. It is revealed that increase in the smoothing ability leads to increase of quantity of rounds, and respectively and dimensions of the mixers of continuous action of vibration type, therefore, it is expedient to use the mixer with quantity of rounds equal 6 and coefficient of recirculation equal 0.7 as at the same time the smoothing ability equal is enough 1753 for receiving qualitative ready mix at a ratio of components 1:50. By means of the correlation analysis it is possible to predict uniformity of a material stream at the device exit at the known values of the time spent in him of material, coefficients of recirculation and dispersion of an entrance signal.

Bayesian optimisation of RANS simulation with ensemble-based variational method in convergent-divergent channel

ABSTRACTThis paper investigates the applicability of a hybrid data assimilation approach, namely ensemble-based variational method (EnVar), to optimise Reynolds Averaged Navier-Stokes (RANS) simulations in convergent-divergent channel from the perspective of Bayesian inference. Concretely, the ensemble-based variational method is applied to infer the inlet velocity and turbulence model corrections by assimilating Direct Numerical Simulation (DNS) results or limited experimental data. The approach is first adopted to infer the inlet velocity profile for the WallTurb Bump and Venturi geometry. The improvement can be achieved near the inlet region for the bump, but for Venturi in light of the view field limited in adverse pressure gradient region, the observation space is not sensitive to the perturbation of inlet condition. In a second step, the model corrections in SST model are investigated by assimilating the limited sparse experimental data. With the inferred model corrections, the predictions on both velocity and turbulent kinetic energy (TKE) get improved. The results indicate that the ensemble-based variational method is efficient in inferring unknown quantities of both low dimension (D=20) and high dimension (D=2400) with small ensemble size robustly and non-intrusively. This approach could prove very useful for Bayesian inference or optimisation in CFD problems.

Фрактальний аналіз як елемент інтелектуальної експертної системи в селекції рослин

The purpose. To form methodology and procedure of building system of accumulation and analytically verified use of information of matrixes of digital photo for formation of statistical fund of parametric states of selection samples in various conditions of vegetative period for its further complex unified assessment and analysis within the limits of intellectual expert system. Methods. Instrumental-cameral, matrix-digital, fractal, mathematical-statistical. Results. According to innovative scientific concept of the “third” form of variability of plants statistical fund is formed of parameters of ontogenetic states of selection samples of leading crops in the form of regression equations of fractal dimensions of quantity. Conclusions. Methodology is offered of expert assessment of dynamic system of formation of morpho-metric parameters of plants of selection samples of crops in the form of fractal dimensions of quantity of the most valuable productive elements in general plant stand. The verified technique of compression of data of matrix of digital photo of selection object (5-6 mbyte of information) up to the level of generalized analytic function of regression equation is developed. Principle of automation of cameral processing, built on mathematically correct algorithms of programs of segmentation of digital visualized images, and further compression of the gained segments up to the level of invariant fractal initial systems is realized in selection practice. Principles of formation of system of metadata in the form of phase-parametrical portraits, Liapunov’s fractals, cubic splines for building supersystem of description of ontogenetic development of plants in conditions of definite vegetative period are offered as a prospect for further researches. In the given supersystem there is an opportunity of determination emergent-synergetic regularity of formation of productive phenotype under action of epigenetic-trigger mechanisms of VGS. That opens real prospects of long-term forecasting productivity.

Distributed hierarchical evaluation and carrying capacity models for water resources based on optimal water cycle theory

Water cycles protect and maintain ecological environments, while enabling sustainable development of human societies. Various approaches have been proposed for maintaining optimal water cycles. This study developed an evaluation system based on both natural and social attributes of the water cycle. The system incorporated the four dimensions of water ecology, water quality, water quantity, and water use in a distributed hierarchical evaluation model. A water resources carrying capacity model was also constructed. Both models were evaluated using the Beijing–Tianjin–Hebei region as a case study. Statistical data from 13 prefecture-level cities were used to assess the water cycle status of this region. Overall, the water cycle status of the Beijing–Tianjin–Hebei region received a score of 3.33, indicating normal status (although this value varied throughout the region) and the standard deviation of the values was up to 0.48. Results suggested that although water use efficiency is close to ideal, insufficient water resources prevent the region from achieving an optimal regional water cycle. Feasible approaches to more sustainable water resource development within the Beijing–Tianjin–Hebei region include developing interregional cooperation, promoting population–industry relocation, and supplementing shortages with interbasin water transfers.

Physical properties of the projectile motion using the conformable derivative

In this paper, the projectile motion in a resisting medium has been investigated by using the conformable derivative. In order to preserve the dimensionality of the physical quantities, an auxiliary parameter σ, which has a dimension of seconds, was imposed in the fractional derivative. The converted FDEs have been analytically solved. In the literature, some authors have suggested some relations between the auxiliary parameter σ and the resistant parameter k. Their procedure is a special case in view of the current results. So, it has been proved in this paper that the dimensions of the physical quantities are always correct without any further assumptions that relate σ with k. Moreover, it is shown in this paper that the fractional order has no effect neither on the trajectory nor on the range of the projectile, i.e., unlike the corresponding previous results. However, the flight time of the projectile depends on the non-integer order α of the conformable derivative. The impacts of the involved parameters on the projectile properties are discussed through tables and several graphs. The values of the range and the flight time are tabulated for the purpose of comparisons with a previous work in the literature and also with the experimental data. Hence, we give some light on the difference between the conformable derivative and the other definitions when applied on the projectile problem.

Interceptación y escorrentía del bosque altoandino en la reserva forestal protectora “El Malmo”

Los bosques tropicales son importantes a nivel mundial por su biodiversidad y los servicios ecosistémicos que proveen, son claves en el ciclo global del agua. Los cambios y presiones de origen antrópico que afectan a los bosques tropicales inciden en el papel fundamental de estos en la provisión de agua. En este trabajo se evalúa la relación de las coberturas vegetales presentes en el Bosque altoandino de la Reserva Forestal Protectora “El Malmo” con la calidad y cantidad de interceptación y escorrentía; la zona de vida analizada comprende cuatro tipos de coberturas: bosque denso altoandino, vegetación secundaria baja, plantación de latifoliadas y mosaico de pastos con espacios naturales. Se instalaron ocho montajes (dos por cobertura) compuestos cada uno de una parcela de escorrentía y un medidor de precipitación bajo el dosel; el levantamiento de datos se efectúo cada ocho días durante 24 semanas. Los resultados indican que la interceptación de la precipitación no difiere en cada cubierta, mientras que si se ve afectada la escorrentía superficial y su calidad respecto a sedimentos, cambios que obedecen fuertemente a las diferencias en las condiciones físicas del suelo. La cobertura que permite las mejores dimensiones de calidad y cantidad de agua es el bosque denso altoandino. La influencia de la intervención antrópica en el área y la presencia de invasoras afectan negativamente estas variables. Este trabajo aporta conocimiento sobre el comportamiento hidrológico de la Reserva, para su uso en la gestión forestal. Así mismo, genera información, hasta el momento inexistente, sobre la relación interceptación/escorrentía en bosques de la región Cundiboyacense, convirtiéndose en punto inicial de comparación para nuevas investigaciones en ecosistemas altoandinos.

A multi-dimensional measure of population ageing accounting for Quantum and Quality in life years: An application of selected countries in Europe and Asia.

Population ageing measured through a fixed old-age threshold like 60+ or 65+ ignores the other important dimensions of ageing. There has been changes among the older persons in multiple dimensions that corresponds to quantity of life years lived as well as the quality of life. The existing multi-dimensional measures also consider the characteristics within a fixed old-age threshold framework which does not account for significant improvements in life expectancy over the years.We propose a new Multidimensional Old Age Threshold (MOAT) measure that accommodates different dimensions of quantity and quality of older persons. We achieve this through a modified framework of the Characteristic Approach. Our measure incorporates a forward-looking approach to measure ageing and specifies an old-age threshold for different countries after accounting for different dimensions of life expectancy, health and human capital. This method is more suitable for comparison across countries with distinct demographic and health achievements.The empirical application of our method using selected countries from Europe and Asia shows that the relative performance of countries differs in terms of MOAT in comparison to estimates based on existing measures, primarily due to the inclusion of the quality dimensions. Countries that have better performance in life expectancy, health and human capital have higher values of MOAT and a lower ‘burden’ of older persons in a cross-country perspective in comparison to the existing measures.

Factor analysis-validated comprehensive employee job performance scale

PurposeThe purpose of this paper is to develop an employee job performance (EJP) scale questionnaire that encompasses the job time, job quality and job quantity dimensions of employee performance.Design/methodology/approachIn this study, the questionnaire questions were first validated using exploratory factor analysis (EFA) and then confirmatory factor analysis (CFA) along the three performance dimensions. The research samples were auto-parts assembly line workers. The factor analysis results confirmed the validity of the questionnaire as a reliable employee performance evaluation tool, as evidenced by the composite reliability (CR) and the average variance extracted (AVE).FindingsThe questionnaire questions identified three factors of EJP, namely, job time, job quality and job quantity, with 13 items. The factor analysis results confirmed the validity of the questionnaire as a reliable employee performance evaluation tool, as evidenced by a CR of 0.894 and AVE of 0.739, in addition to χ2=63.340, df=54, p=0.180, goodness of fit index=0.976, adjusted goodness of fit index=0.960, RMSEA=0.021 and root mean square residue=0.014.Research limitations/implicationsThe EJP scale questionnaire was examined using only EFA and CFA. These scales are expected to help academics, researchers and practitioners test theories. Because of the features of the sample, the final results should be considered carefully.Practical implicationsImportantly, the factor analysis results suggest that the proposed EJP scale questionnaire can be applied to various industries and settings either as is or with minimal modifications.Originality/valueThe EJP questionnaire is novel and can serve as an excellent EJP tool to measure employees’ behavioral output. The questionnaire can provide empirical data on employee performance output based on the employee’s perspective.

Toward the Expression of Shoah. Language Issue in Erwin Schenkelbach’s Stories.

Language represents different levels and is characterized by different semiotic registers in the context of the investigated collection of narratives. In particular, it relates to the language connections with acts of reading, speaking and writing. One of the clearly defined levels of language manifestation can be considered the functional field of the main character. Reading for him is the key to the world of culture and one of the ways of being in the world.
 Child narrator also creates his own reading technique – parallel simultaneous reading. Reading is meaningful sign of the narrator’s family life too. Narrator’s memories bring out images of reading parent, their favourite books and authors. Catastrophe carries a quantity of different dimensions of language, among which language as a strategy of survival. Stylistic speech registers actuate gender and sociolect issue. Unconventional dimension of language saves life of the hero in extreme survival situations. In the times of war language, on the one hand, divides world into ours and strangers, cuts the time for then and now, on the other hand, language is subjected to the pressure of alienation and ambivalence. Language also plays significant role in the process of hero’s self- identification. Traumatic experience of Shoah motivates the narrator to formulate fundamental questions in the context of self-identification processes. An important level of language functioning in short stories is the level of author's poetic system with its dialogical and intertextual peculiarities. This level is influenced by B. Schulz’s prose, E. Jabès’ poems and K. Jaspers’ concept of talking through the Second World War traumatic experience. Phenomenon under analysis requires further examination, including the involvement of a wider range of comparative materials connected with survivors' experience of Shoah from the child narrator modeling perspective. Specificity of the creation of the Other in E. Schenkelbach’s short stories deserves for a separate subject conversation. This will be the subject of our further research studies.

Lavapiés dixit: apuntes para (re)visitar la recuperación de los centros históricos y su vivienda

Es una idea generalizada pensar que el patrimonio cultural constituye un espectro esencial y dinámico de la actividad humana. Si los centros históricos representan comunidades privilegiadas tanto cuantitativa como cualitativamente de estos conjuntos, es posible entender que la adecuada gestión de dicho patrimonio puede devenir en incremento de la calidad de vida de dichas comunidades. Él análisis de casos de gestión del patrimonio cultural experimentados en centros históricos europeos como Madrid (España) aporta a desarrollar una visión panorámica y a sistematizar las “lecciones aprendidas”.

Quantity, Components, and Value of Waste Materials Landfilled in the United States

SummaryThe current system of production and consumption needs end‐of‐life disposal to function, but the linkage between upstream production‐consumption with the downstream landfill as terminus is, at best, a tenuous, one‐way relationship, suggesting a partial system failure. A starting point to fix this link is to confront, systematically, the messy “black box” that is mixed waste landfilling, interrogate its contents locally, and determine a baseline that can be used to scale up results. Here, we develop a detailed model characterizing landfilled municipal solid waste (MSW) in the United States across the dimensions of material quantity, quality, location, and time. The model triangulates measurements spanning 1,161 landfills (representing up to 95% of landfilled MSW) and 15,169 solid waste samples collected and analyzed at 222 sites across the United States. We confirm that landfilled quantities of paper (63 million megagrams [Mg]), food waste (35 million Mg), plastic (32 million Mg, textiles (10 million Mg), and electronic waste (3.5 million Mg) are far larger than computed by previous top‐down U.S. government estimates. We estimate the cost of MSW landfill disposal in 2015 (10.7 billion U.S. dollars [USD]) and gross lost commodity value of recyclable material (1.4 billion USD). Further, we estimate landfill methane emissions to be up to 14% greater (mass basis) than the 2015 U.S. inventory. By principally relying on measurements of waste quantity and type that are recorded annually, the model can inform more effective, targeted interventions to divert waste materials from landfill disposal, improve local, regional, and national emission estimates, enhance dissipative loss estimates in material flow analyses, and illuminate the dynamics linking material, energy, and economic dimensions to production, consumption, and disposal cycles.

Bounds on the discrete spectrum of lattice Schrödinger operators

We discuss the validity of the Weyl asymptotics—in the sense of two-sided bounds—for the size of the discrete spectrum of (discrete) Schrödinger operators on the d-dimensional, d ≥ 1, cubic lattice Zd at large couplings. We show that the Weyl asymptotics can be violated in any spatial dimension d ≥ 1—even if the semi-classical number of bound states is finite. Furthermore, we prove for all dimensions d ≥ 1 that, for potentials well behaved at infinity and fulfilling suitable decay conditions, the Weyl asymptotics always hold. These decay conditions are mild in the case d ≥ 3 while stronger for d = 1, 2. It is well known that the semi-classical number of bound states is—up to a constant—always an upper bound on the size of the discrete spectrum of Schrödinger operators if d ≥ 3. We show here how to construct general upper bounds on the number of bound states of Schrödinger operators on Zd from semi-classical quantities in all space dimensions d ≥ 1 and independently of the positivity-improving property of the free Hamiltonian.

The Influence of Election Supervisory Behavior on the Performance of the Regional Head Election Organizer in North Sumatera Province

The purpose of this research is to analyze the influence of behavior of regency/municipality election supervisor on the performance of the election organizer of a regional head (election) in North Sumatera Province. The basis of behavioral theory used in accordance with the phenomena observed in the field is the theory of behavior in which there are dimensions of encouragement, motivation, attitudes, and values ​​with the originator of Mar'at. While the theory of performance using Ruky S Achmad's theory which includes dimensions of quality, quantity, timeliness, cooperation, and responsibility. The method used is survey method with a census. Then, the data is tabulated and analyzed using multiple regressions. The results showed that the biggest dimension of behavior contributing to the performance of the election organizer is the dimension of encouragement (X1) of 1,612, the value (X2) of 1.541, the motivation (X3) of 0.978 and the attitude (X4) of 0.803. While the determination coefficients test (R2) amounted to 83.4%. Other undetectable factors (ε / epsilon) contributed to the election performance of 16.6%.

Time-Dependent Density Functional Theory for Open Systems and Its Applications.

Photovoltaic devices, electrochemical cells, catalysis processes, light emitting diodes, scanning tunneling microscopes, molecular electronics, and related devices have one thing in common: open quantum systems where energy and matter are not conserved. Traditionally quantum chemistry is confined to isolated and closed systems, while quantum dissipation theory studies open quantum systems. The key quantity in quantum dissipation theory is the reduced system density matrix. As the reduced system density matrix is an O(M! × M!) matrix, where M is the number of the particles of the system of interest, quantum dissipation theory can only be employed to simulate systems of a few particles or degrees of freedom. It is thus important to combine quantum chemistry and quantum dissipation theory so that realistic open quantum systems can be simulated from first-principles. We have developed a first-principles method to simulate the dynamics of open electronic systems, the time-dependent density functional theory for open systems (TDDFT-OS). Instead of the reduced system density matrix, the key quantity is the reduced single-electron density matrix, which is an N × N matrix where N is the number of the atomic bases of the system of interest. As the dimension of the key quantity is drastically reduced, the TDDFT-OS can thus be used to simulate the dynamics of realistic open electronic systems and efficient numerical algorithms have been developed. As an application, we apply the method to study how quantum interference develops in a molecular transistor in time domain. We include electron-phonon interaction in our simulation and show that quantum interference in the given system is robust against nuclear vibration not only in the steady state but also in the transient dynamics. As another application, by combining TDDFT-OS with Ehrenfest dynamics, we study current-induced dissociation of water molecules under scanning tunneling microscopy and follow its time dependent dynamics. Given the rapid development in ultrafast experiments with atomic resolution in recent years, time dependent simulation of open electronic systems will be useful to gain insight and understanding of such experiments. This Account will mainly focus on the practical aspects of the TDDFT-OS method, describing the numerical implementation and demonstrating the method with applications.

New Discovery on Planck Units and Physical Dimension in Cosmic Continuum Theory

In 1899, Max Planck integrated the Planck constant h with the gravitational constant G and the speed of light c, discovered a set of physical constants, and created Planck Units System. Since 20th century, the development of physics made the gravitational constant, the speed of light, and the Planck constant the most important fundamental constants of physics representing classical theory, relativity, and quantum theory, respectively. Now, the Planck Units have been given new physical meanings, revealing the mysteries of many physical boundaries. However, more than 100 years have passed, Planck Units System not only failed to get rid of the incompatibility between the basic theories of physics, but also cannot surpass the limitations of existing physics theories. In Cosmic Continuum Theory, physical dimensions can be transformed under the principle of equivalence. Planck units system not only integrates into the axiom system of Cosmic Continuum Theory, but also establishes a benchmark for the unity of physical dimensions. The introduction of the abstract physical dimensions “JX” and “XJ” makes the physical dimension of existence quantity and dimension quantity unified respectively.

Topological Characterization of Fractured Coal

AbstractCoal transport properties are highly dependent on the underlying fractured network, known as cleats, which are characterized by geometrical and topological properties. X‐ray microcomputed tomography (micro‐CT) has been widely applied to obtain 3‐D digital representations of the cleat network. However, segmentation of 3‐D data is often problematic due to image noise, which will result in inaccurate estimation of coal properties (e.g., porosity and specific surface area). To circumvent this issue, a discrete fracture network (DFN) model is proposed. We develop a characterization framework to determine if the developed DFN models can preserve the topological properties of the coal cleat network found in micro‐CT data. We compute the Euler characteristic, fractal dimension, and percolation quantities to analyze the topology locally and globally and compare the results between micro‐CT data (before denoising), filtered micro‐CT data (after denoising), and the DFN model. We find that micro‐CT data with noise have extensive connectivity while filtered micro‐CT data and DFN models have similar topology both globally and locally. It is concluded that the topology of the DFN models are closer to that of the realistic cleat network that do not have segmentation‐induced pores. In addition, micro‐CT imaging always struggles with the trade‐off between sample size and resolution, while the presented DFN models are not restricted by imaging resolution and thus can be constructed with extended domain size. Overall, the presented DFN model is a reliable alternative with realistic cleat topology, extended domain size and favorable data format for direct numerical simulations.