Application Of New Model Research Articles

Segmentation of high-speed flow fields using physics-informed clustering

The advent of data-based modeling has provided new methods and algorithms for analyzing the complex flow fields in high-speed combustion applications. These techniques can be used to study the fluid dynamics and reaction progress in different regions of the flow, which can provide insight into the underlying physics of the system while helping one identify avenues for the development and application of new models. The present work implements two such algorithms – the standard K-means clustering algorithm and a modified Jacobian-scaled K-means clustering algorithm – to analyze a high-speed reacting flow field. The results show that the Jacobian-scaled K-means algorithm allocates more clusters in the regions of the thermochemical state space where chemical source term is highest. In physical space, this concentrates the flow partitions in regions where heat release rate is higher and chemical timescales are lower. This is observed for different cluster numbers and data sets. When moving between data sets that occupy different portions of the state space, the cluster centroid locations are found to be less sensitive to the data set when the Jacobian-scaled K-means algorithm is used. Altogether, the modified K-means algorithm provides a new tool for identifying thermodynamic and thermochemical similarities in and across compressible reactive flow fields.

Status of the Dielectric Constant of Sea Water at L-Band for Remote Sensing of Salinity

The model expressing the dielectric constant of sea water at microwave frequencies as a function of salinity and temperature is an important element in remote sensing of sea surface salinity. It is also important independently as a description of the physical properties of salt water. A major milestone was the development in the late 1970’s by Klein and Swift of a model based on laboratory measurements at L- and S-band and a functional form supported by theory for polar molecules and previous work on freshwater. Much of the subsequent work has focused on measurements at higher frequency and determining model parameters tuned to apply for applications such as remote sensing of sea surface temperature. Interest in the dielectric constant at 1.4 GHz (L-band) increased again with the development of SMOS and Aquarius to measure salinity from space. But there have been few new measurements at L-band and often confusion regarding the applicability of new models at 1.4 GHz. The objective of this manuscript is to compare available models in the context of how well they represent the dielectric constant of sea water at 1.4 GHz. Among the criteria applied will be the recent measurements at the George Washington University of the dielectric constant at 1.4 GHz.

Performance measurement in a “hidden champion” company: An empirical study

The purpose of the paper is to review and evaluate the performance of a specific type of globally successful innovative company introduced to scientific literature as “hidden champion” by Simon (1990), using a combination of traditional financial key performance indicators (KPIs) with the modern evaluation method of the European Foundation for Quality Management (EFQM) model. The results showed that there are many areas in the selected company where EFQM allows building an effective management system, applied as a benchmarking tool for using the experience of leading companies. The joint utilisation of the KPIs and the EFQM model helps to create an objective picture and evaluate the organization in a relatively complex way. This paper provides in-depth insights into the application of new models in practice that are still scarce and may serve as a base for further research realized on larger samples. This work shows for the first time the application of EFQM commonly used in large organizations, for the special category of small and medium-size enterprises (SMEs) companies called “hidden champions” (HCs). In general, there is a lack of studies in domestic literature devoted to the concept of “hidden champions”. This paper contributes to this field from the perspective of quality management, and it provides also valuable insight for practice.

Prediction of critical properties of sulfur-containing compounds: New QSPR models

In this study, new models have been proposed for the prediction of different critical properties (critical temperature (TC), critical pressure (PC), critical volume (VC), and acentric factor (ω)) of the sulfur-containing compounds based on quantitative structure-property relationship (QSPR). An extensive data set containing experimental data of over 130 different sulfur-containing compounds was employed. Enhanced Replacement Method (ERM) was applied for subset variable selection. Based on ERM selected descriptors, two different models, including linear model and genetic programming (GP) based non-linear model have been proposed for each critical property. The predicted values of each target were in good agreement with the experimental data. For GP-based models, the values of the coefficient of determination (R2) were 0.936, 0.976, 0.990, and 0.917 for TC, PC, VC, and ω, respectively. After revisiting the available QSPR models, it was found that the domain of applicability of new models has been expanded.

Novel insights from Fe-isotopes into the lithological heterogeneity of Ocean Island Basalts and plume-influenced MORBs

The extent of lithological heterogeneity in the Earth's convecting mantle is highly debated. Whilst the presence of pyroxenite in the mantle source regions of Ocean Island Basalts (OIBs) has traditionally been constrained using the minor-element chemistry of olivine phenocrysts, recent studies have shown that the Ni and Mn contents of primitive olivines are influenced by the conditions of mantle melting, as well as magma chamber processes. Nevertheless, constraining the lithological properties of the mantle is important due to its influence on the P-T path followed by solid mantle material during adiabatic ascent, as well as the density of upwelling mantle plumes. We have therefore explored the use of Fe-isotopes as a novel method of tracing lithological heterogeneity in the mantle source regions beneath plume-influenced segments of the global Mid-Ocean Ridge system as well as OIBs.We present new Fe-isotope (δ56Fe) and trace-element data for 26 basaltic glasses from the plume-influenced Galápagos Spreading Centre to investigate the relative roles of pyroxenite and peridotite in the mantle source region of oceanic basalts. Our data reveals significant heterogeneity in the Fe-isotope composition of the Galápagos Spreading Centre basalts (+0.05 to +0.25‰ δ56Fe), which correlates with key major- and trace-element parameters (e.g. CaO(8)/Al2O3(8), [La/Sm]n). Application of new models developed to calculate Fe-isotope fractionation during mantle melting, alongside Monte Carlo simulations for melting of a 2-component peridotite mantle, show that this variation cannot be caused by changes in melting processes and/or oxygen fugacity of a peridotitic mantle. Instead, our new δ56Fe data is best explained by variations in the proportion of isotopically-heavy pyroxenite-derived melt that contributes to the GSC basalts, and conclusively shows that lithological heterogeneity exists in the Galápagos mantle plume. Our findings have implications for the moderately-heavy δ56Fe compositions measured in plume-influenced basalts from the Society Islands, Rochambeau Ridges of the Lau back-arc basin, and the FAMOUS segment of the Mid-Atlantic Ridge, which we suggest may also represent contribution from pyroxenite-derived melts.

Konceptualni okvir za dizajniranje arhitekture menadžmenta ljudskih resursa

Intensive changes in the business environment with significant implications for organizations reflected in increasing their size, thinning structures, the application of new models in the intra and interorganizational designs, the growing importance of knowledge management and the application of multistrategies have produced significant effects on the human resource management (HRM) architecture. As there are a number of different approaches to the HRM architecture in the relevant literature, this paper is aimed at creating an integral conceptual framework for designing this function. For this purpose, the paper analyzes different approaches to HRM design from the standpoint of the main theoretical models of organizational design in order to identify both similarities and distinctions between them, and build up an integral conceptual framework for designing the HRM architecture. These will form the ground for the application of a comprehensive approach in creating, analyzing and understanding the HRM architecture. The research findings suggest that the HRM modern architecture includes six design elements, namely: HRM contingent factors, key stakeholders' interests, the HRM hard components, the HRM soft components, organizational results, and feedback.

A Secchi Depth Algorithm Considering the Residual Error in Satellite Remote Sensing Reflectance Data

A scheme to semi-analytically derive waters’ Secchi depth (Zsd) from remote sensing reflectance (Rrs) considering the effects of the residual errors in satellite Rrs was developed for the China Eastern Coastal Zone (CECZ). This approach was evaluated and compared against three existing algorithms using field measurements. As it was challenging to provide the accurately inherent optical properties data for running the three existing algorithms in the extremely turbid waters, the new developed algorithm worked more effective than the latter. Moreover, with both synthetic and match-up data, the results indicated that the proposed algorithm was able to minimize some residual errors in Rrs, and thus could generate inter-mission consistent Zsd results from two ocean color missions. Finally, after application of new model to satellite images, we presented the spatial and temporal variations of Secchi depth and trophic state in the CECZ during 2002–2014. The study led to several findings: Firstly, the Zsd-based trophic state index (TSI) in the East China Sea first increased since 2002, and then gradually dropped during 2008–2014. Secondly, more and more waters within 30–35 m and 20–25 m isobaths were deteriorating from oligotrophic to mesotrophic type and from mesotrophic to eutrophic water, respectively, during 2002–2014. Lastly, the TSI increased on average 0.091 and 0.286 m per year respectively in Bohai Sea and Yellow Sea since 2002, and it might only take 14 and 67 years for Bohai Sea and Yellow Sea to deteriorate from mesotrophic to eutrophic water, following their current yearly deterioration rate and trophic trend. These results highlighted the importance to make some strict regulations for protecting the aquatic environment in the CECZ.

Three tree priors and five datasets

Abstract The age of the root of the Indo-European language family has received much attention since the application of Bayesian phylogenetic methods by Gray and Atkinson (2003). With the application of new models, the root age of the Indo-European family has tended to decrease from an age that supported the Anatolian origin hypothesis to an age that supports the Steppe origin hypothesis (Chang et al., 2015). However, none of the published work in Indo-European phylogenetics has studied the effect of tree priors on phylogenetic analyses of the Indo-European family. In this paper, I intend to fill this gap by exploring the effect of tree priors on different aspects of the Indo-European family’s phylogenetic inference. I apply three tree priors—Uniform, Fossilized Birth-Death (FBD), and Coalescent—to five publicly available datasets of the Indo-European language family. I evaluate the posterior distribution of the trees from the Bayesian analysis using Bayes Factor, and find that there is support for the Steppe origin hypothesis in the case of two tree priors. I report the median and 95 % highest posterior density (HPD) interval of the root ages for all three tree priors. A model comparison suggests that either the Uniform prior or the FBD prior is more suitable than the Coalescent prior to the datasets belonging to the Indo-European language family.

A New Approach of a Specific Sustainability Model

The paper presents a new approach for obtained the sustainability of the construction works. In the technical literature there are a lot of models which evaluate the sustainability performance of the construction works with high applicability and very comprehensive. In many cases such models show some disadvantage: some models do not cover all three dimensions of the sustainability; all of them include a great number of criteria and many of them are difficult or impossible to quantify; they are focused manly on entire buildings and they can be applied with some difficulties on other types of construction works and activities. The first step to avoid such disadvantages was by proposal a so called specific model with some advantages: high degree of utilization includes only quantitative parameters, covers the three dimensions of sustainability. The second step is presented in this paper by a new approach which takes into account the price of each parameter and finally, the sustainability cost is established. The application of new model is presented on three different construction works. Using of the new approach some advantages are obtained: such calculation is easy understandably by specialists; by using the correction of the mechanical characteristics the most sustainable solution is obtained: costs of main parameters where taken from Romanian practice, but for different zones and countries, such costs will have to be used.

Model application research for liquid entrainment through ADS-4 pipe in AP1000

Application research of two new liquid entrainment models for separately predicting the beginning of entrainment and branch entrainment quality is performed which is a continuation of previous experimental and theoretical studies on the entrainment at T-junction. The new onset entrainment model and branch quality model are developed on the basis of the scaling experiment for studying ADS-4 entrainment phenomenon in AP1000 plant, and the two new models along with previously published entrainment models are compared. The results show that previous models in the background of entrainment through a small break of primary pipe are not suitable for predicting the entrainment through a large size branch (e.g. ADS-4 pipe), while the two new models have a larger applicability. Also, the new entrainment models are written into the RELAP5 code, and then a typical 2-in SBLOCA transient in AP1000 is simulated separately by the modified RELAP5 and the original RELAP5 to further discuss the applicability of new models for the simulation of entrainment through ADS-4. The results show that the modified RELAP5 can get more reasonable simulation results. In view of original RELAP5 overestimated core coolant inventory, the modified RELAP5 can get a conservative core coolant inventory. Hence we can conclude that the new entrainment models are more suitable for the simulation of entrainment through ADS-4.

Joint charging mode and location choice model for battery electric vehicle users

This paper aims to investigate the choice for charging mode and location with the revealed preference data of battery electric vehicle (BEV) users in Japan. Three alternatives including the normal charging at home (for private BEVs)/company premise (for commercial BEVs), normal charging at public charging stations and fast charging at public charging stations are defined. A mixed logit model is developed to investigate what and how factors influence BEV users’ choice of charging mode (normal or fast) and location (home/company or public stations), by identifying an appropriate instrumental variable to correct the serious endogeneity problem caused by the midnight indicator. The parameters estimation and results interpretation are conducted for private and commercial BEVs respectively. They suggest that the battery capacity, midnight indicator, initial state of charge (SOC) and number of past fast charging events are the main predictors for users’ choice of charging mode and location, that the day interval between current charging and next trip positively affects the normal charging at home/company. In addition, with the increasing of vehicle-kilometres of travel (VKT)/travel duration on former/next travel day, the probability of normal charging at home/company is increased for commercial BEVs, while is decreased for private BEVs. The findings obtained herein have provided new insights into the realization of power peak-load shifting and operation strategy for public charging stations, as well as inspired the development and application of new models and methodologies to determine the density and deployment of public charging stations.

A new robust DEA model and super-efficiency measure

Applications of traditional data envelopments analysis (DEA) models require knowledge of crisp input and output data. However, the real-world problems often deal with imprecise or ambiguous data. In this paper, the problem of considering uncertainty in the equality constraints is analyzed and by using the equivalent form of CCR model, a suitable robust DEA model is derived in order to analyze the efficiency of decision-making units (DMUs) under the assumption of uncertainty in both input and output spaces. The new model based on the robust optimization approach is suggested. Using the proposed model, it is possible to evaluate the efficiency of the DMUs in the presence of uncertainty in a fewer steps compared to other models. In addition, using the new proposed robust DEA model and envelopment form of CCR model, two linear robust super-efficiency models for complete ranking of DMUs are proposed. Two different case studies of different contexts are taken as numerical examples in order to compare the proposed model with other approaches. The examples also illustrate various possible applications of new models.

Scalar mixing and strain dynamics methodologies for PIV/LIF measurements of vortex ring flows

Fluid mixing operations are central to possibly all chemical, petrochemical, and pharmaceutical industries either being related to biphasic blending in polymerisation processes, cell suspension for biopharmaceuticals production, and fractionation of complex oil mixtures. This work aims at providing a fundamental understanding of the mixing and stretching dynamics occurring in a reactor in the presence of a vortical structure, and the vortex ring was selected as a flow paradigm of vortices commonly encountered in stirred and shaken reactors in laminar flow conditions. High resolution laser induced fluorescence and particle imaging velocimetry measurements were carried out to fully resolve the flow dissipative scales and provide a complete data set to fully assess macro- and micro-mixing characteristics. The analysis builds upon the Lamb-Oseen vortex work of Meunier and Villermaux [“How vortices mix,” J. Fluid Mech. 476, 213–222 (2003)] and the engulfment model of Baldyga and Bourne [“Simplification of micromixing calculations. I. Derivation and application of new model,” Chem. Eng. J. 42, 83–92 (1989); “Simplification of micromixing calculations. II. New applications,” ibid. 42, 93–101 (1989)] which are valid for diffusion-free conditions, and a comparison is made between three methodologies to assess mixing characteristics. The first method is commonly used in macro-mixing studies and is based on a control area analysis by estimating the variation in time of the concentration standard deviation, while the other two are formulated to provide an insight into local segregation dynamics, by either using an iso-concentration approach or an iso-concentration gradient approach to take into account diffusion.

Understanding the peculiarities of the piezoelectric effect in macro-porous BaTiO3

This work demonstrates the potential of porous BaTiO3 for piezoelectric sensor and energy-harvesting applications by manufacture of materials, detailed characterisation and application of new models. Ferroelectric macro-porous BaTiO3 ceramics for piezoelectric applications are manufactured for a range of relative densities, α = 0.30–0.95, using the burned out polymer spheres method. The piezoelectric activity and relevant parameters for specific applications are interpreted by developing two models: a model of a 3–0 composite and a ‘composite in composite’ model. The appropriate ranges of relative density for the application of these models to accurately predict piezoelectric properties are examined. The two models are extended to take into account the effect of 90° domain-wall mobility within ceramic grains on the piezoelectric coefficients . It is shown that porous ferroelectrics provide a novel route to form materials with large piezoelectric anisotropy at 0.20 ≤ α ≤ 0.45 and achieve a high squared figure of merit . The modelling approach allows a detailed analysis of the relationships between the properties of the monolithic and porous materials for the design of porous structures with optimum properties.

Creative Problem Solving Methods in Education Field and Compare Classic and Matrix 2003

TRIZ - is the method enabling stimulation of creative problem solving by way of using the developed knowledge bases, similar system functioning and contradictions removal. The system of education is one of the most complex social systems, burdened with multiple contradictions. The education system’s contradictions comprise wishes of parents versus capabilities of children, wishes of teachers versus educational institution capabilities, etc., so that the need arises for presenting the assembling of educational requirements of the society for improving the level of education, versus writing new educational plans, by way of improved technical resources of the society. Being creative, the TRIZ method is an important part of the technological education program at high schools of professional studies and at faculties in the course of studying. An important link to TRIZ method application in education is envisaging of teachers’ perceptions in the education technology, which is the first step towards introducing TRIZ method into the educational plan and program at lower educational levels as well. By updating the classical contradiction matrix, there originated the 2003 matrix which takes into consideration and envisages frequency of innovative principles occurrence, thus rendering a significant progress in TRIZ method developing and application. The paper offers and develops application of new models of education management by way of TRIZ method, by the relocation innovative principles of classical and 2003 contradiction matrixes, with the special contribution of applying creative principles in the field of education.

Primary care physician insights into a typology of the complex patient in primary care.

Primary care physicians play unique roles caring for complex patients, often acting as the hub for their care and coordinating care among specialists. To inform the clinical application of new models of care for complex patients, we sought to understand how these physicians conceptualize patient complexity and to develop a corresponding typology. We conducted qualitative in-depth interviews with internal medicine primary care physicians from 5 clinics associated with a university hospital and a community health hospital. We used systematic nonprobabilistic sampling to achieve an even distribution of sex, years in practice, and type of practice. The interviews were analyzed using a team-based participatory general inductive approach. The 15 physicians in this study endorsed a multidimensional concept of patient complexity. The physicians perceived patients to be complex if they had an exacerbating factor-a medical illness, mental illness, socioeconomic challenge, or behavior or trait (or some combination thereof)-that complicated care for chronic medical illnesses. This perspective of primary care physicians caring for complex patients can help refine models of complexity to design interventions or models of care that improve outcomes for these patients.

Polityka gospodarcza księcia Bolesława V Wstydliwego wobec biskupstwa i katedry krakowskiej

Niniejszy artykuł jest próbą ukazania przemian, jakie zaszły w Małopolsce w drugiej połowie XIII wieku. Był to okres bardzo dynamicznych przemian zarówno gospodarczych, jak też społecznych. Książę krakowsko-sandomierski Bolesław Wstydliwy zdawał sobie sprawę zarówno z konieczności zmian, jak też z możliwości, jakie ze sobą niosły. Znamienny był tu przykład płynący z krajów ościennych – szczególnie z księstw śląskich, Czech i Węgier, gdzie motorem owych przemian była kolonizacja na prawie niemieckim. Władca Krakowa, zdając sobie sprawę z potęgi gospodarczej biskupa i kapituły krakowskiej, starał się wciągnąć obie te instytucje w rytm przemian. Dzięki wsparciu Kościoła krakowskiego udało mu się zmodernizować i przyspieszyć przemiany zachodzące w księstwie krakowsko-sandomierskim. Współpraca pozwoliła wzmocnić się zarówno biskupowi i kapitule – poprzez uzyskanie rozległych przywilejów i rozwój gospodarczy swoich majątków, jak też wdrożyć nowe wzorce zagospodarowywania dóbr. Dzięki wzorowej współpracy na linii Kościół krakowski–monarcha udało się także uniknąć długich i często bardzo kosztownych sporów, jakie można było zaobserwować w księstwach ościennych. Niewątpliwie rządy wewnętrzne księcia Bolesława Wstydliwego i jego polityka oparta na porozumieniu z Kościołem krakowskim oraz wciągnięciu go w mechanizmy przemian gospodarczych pozwoliły na szybki rozwój jego władztwa – zarówno na płaszczyźnie handlowej, gospodarczej, jak i urbanizacyjnej oraz społecznej.

Application of New Models in Rheological Behavior Study Sunflower Oil

Sunflower oil is the non -volatile oil compressed from sunflower (Helianthus annuus) seeds. Sunflower oil contains predominantly linoleic (48 �7%), oleic (14 �40%), palmitic (4 �9%) and stearitic (1 �7%).In general, viscosity measures the resistance of a liquid to flow. From a molecular point of view, viscosity is an indirect measurement of the internal friction between the molecules that constitute the fluid and which oppose liquid movement. Therefore, viscosity must have significant correlations with structural parameters of the fluid molecules. The sunfloweroil were investigated using a Haake VT 550 Viscotester developing shear rates ranging between 3 and 120 s -1

Innovative Problem Solving Methods in Education Field

TRIZ (Теория Решеня Изобретательных Задач – Theory of innovative problem solving) - is the method enabling stimulation of creative problem solving by way of using the developed knowledge bases. It has been proved that innovative inventions from certain fields of technologies can be applied not only to technical but also to the social human activities, and thus to education as well. TRIZ exploration begins with the hypothesis that there are no universal principles of finding creative solution for any problem based on innovation and advanced technologies. TRIZ support has shown ex-cellent results in the field of education, as well. The system of education is one of the most complex social systems, bur-dened with multiple contradictions. The education system’s contradictions comprise wishes of parents versus capabilities of children, wishes of teachers versus educational institution capabilities, etc., so that the need arises for presenting the assembling of educational requirements of the society for improving the level of education, versus writing new educational plans, by way of improved technical resources of the society. Basic TRIZ concepts says that creative solutions require removing of contradictions. Being creative, the TRIZ method is an important part of the technological education program at high schools of professional studies and at faculties in the course of studying. An important link to TRIZ method application in education is envisaging of teachers’ perceptions in the education technology, which is the first step towards introducing TRIZ method into the educational plan and program at lower educational levels as well. The paper offers and develops application of new models of education management by way of TRIZ method, by the matrix of forty innovative principles, as well as by the matrix of four most influential features, with the special contribution of applying creative principles in the field of education.

MODELING OF THE KINETIC OF SALICYLIC ACID ADSORPTION IN POLYMERIC AND ACTIVATED CHARCOAL ADSORBENTS

The understanding of adsorption mechanisms of compounds utilized in many medications and prescription drugs represents an important step for the development of different separation processes of such substances. The adsorption kinetic study of such chemical compounds through the application of new models permits a better comprehension of the involved mechanisms, leading to the estimation of important parameters that will be incorporated in the equipment design. In this work a kinetic model of irreversible adsorption is implemented, which is dependent on both solute and site concentrations. It showed to be very effective correlating the simulated results with the adsorption experiments of salicylic acid through three adsorbents in different temperature conditions. The application of an inverse problem approach, with the minimization of the squared residues cost function, was successful in determining the kinetic parameters. The increase in the kinetic constants obtained with the temperature increase was followed by a reduction in the adsorption capacity of the adsorbents. Thermodynamic parameters were also estimated, leading to the comprehension about the equilibrium states of the adsorption systems considered.