Miracle-dz/UniFAR-FTUs huggingface dataset:
Deterministic‐like solution to the non‐convex economic dispatch problem

Funding information Advanced Power and Energy Centre (APEC) at Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates, Grant/Award Number: RCII-006-2018 Abstract This paper proposes a novel stochastic solution method for the static nonconvex power economic dispatch problem. All practical features such as valve point effects, ramp rate limits, prohibited operating zones, multiple fuel options, spinning reserve constraints, and transmission losses are considered. To develop the proposed algorithm, two modifications that significantly enhance the exploitation capability of the artificial bee colony algorithm are introduced. The first modification concerns onlooker and employed bees to focus their search around the best solution found so far. The second modification optimizes the escaping behavior from local minimums using scout bees. The proposed modifications form a multi-level concentric search around the best solution found. Finally, combining the modified artificial bee colony algorithm with Levy flight cycles, which improve the escaping capability from local minimums, leads to the proposed algorithm. The algorithm parameters have been tuned to provide a deterministic-like solution with ten benchmark problems. The improvement added by each proposed modification to the artificial bee colony algorithm has been confirmed using the Wilcoxon rank-sum test. The obtained results by the proposed algorithm are superior compared to those reported in the literature. Moreover, estimated probabilities of more than 99.9% to obtain the global optimal solution are achieved.
A Very Simple Synthesis of 1-(Ethyl 6-O-Acetyl-2,3,4-trideoxy-α-d-erythro-hex-2-enopyranos-4-yl)-1,2,3-triazole Derivatives

The copper-catalyzed reaction of ethyl 4-azido-6-O-acetoxy-2,3,4-trideoxy-a-D-erythro-hex-2-enopyranoside with various functionalized alkynes gave the corresponding 1-(ethyl 6-0-acetyl-2,3,4-trideoxy-a-D-erythro-hex-2-enopyranos-4-yl)-1,2,3-triazole derivatives in quite good yields, which could be transformed into (ethyl 2,3,6-tri-O-acetyl-4-deoxy-a-D-mannopyranosyl)-1H-1,2,3-triazole by a simple bis-hydroxylation.
A Study on Thermodynamic Functions of Detonation Products

Thermodynamic parameters of detonation products were calculated using functions based on the enthalpy H0 − H. The results are compared to the experimental data and discussed with respect to other methods. Within the same temperature range the accuracy was considerably improved. The coefficients for the thermodynamic functions of detonation products are given in an appendix.
The Influencing Factors of Dropout and Persistence of Central European Hungarian Minorities in Higher Educational Institutions

The statistics show that minority Hungarians’ education and participation in higher education, lags far behind the majority of society in Central Europe. Furthermore, we also know that the smaller the community, the more educated they are. The explanation for this could be, those who are less educated are more prone to assimilate. As a result, the existential question from these minority groups comes down to the growth of their level of education, a condition of which is university students’ acquisition of diplomas. Those factors deserve more scrutiny, in their identification, that increase the chances of getting a diploma. The goal of our study is (1) to identify the students who are persistent and at risk of dropping out, (2) to define the risk factors, and (3) at the same time to uncover the protective/ supporting factors as well. The theoretical background for our research was constituted by the institutional integrational model. The database used for this study contains data collected during a survey of Hungarian students from four different countries in Central Europe (IESA 2015, N= 2017). We found from our research that though the effect of intergenerational connections among students at Central European minority schools proved significant, the effect of place of residence, of settlement type, and of relationships within the family was even stronger.
Block copolymer compatibilizers for polystyrene/poly(dimethylsiloxane) blends

Symmetric polystyrene (PS)–poly(dimethylsiloxane) (PDMS) diblock copolymers were mixed into a 20% dispersion of PDMS in PS. The effect of adding the block copolymer on the blend morphology was examined as a function of the block copolymer molecular weight (Mn,bcp), concentration, and viscosity ratio (ηr). When blended together with the PS and PDMS homopolymers, most of the block copolymer appeared as micelles in the PS matrix. Even when the copolymer was preblended into the PDMS dispersed phase, block copolymer micelles in the PS matrix phase were observed with transmission electron microscopy after mixing. Adding 16 kg/mol PS–PDMS block copolymer dramatically reduced the PDMS particle size, but the morphology, as examined by scanning electron microscopy, was unstable upon thermal annealing. Adding 156 kg/mol block copolymer yielded particle sizes similar to those of blends with 40 or 83 kg/mol block copolymers, but only blends with 83 kg/mol block copolymer were stable after annealing. For a given value of Mn,bcp, a minimum PDMS particle size was observed when ηr ∼ 1. When ηr = 2.6, thermally stable, submicrometer particles as small as 0.6 μm were observed after the addition of only 3% PS–PDMS diblock (number-average molecular weight = 83 kg/mol) to the blend. As little as 1% 83 kg/mol block copolymer was sufficient to stabilize a 20% dispersion of 1.1-μm PDMS particles in PS. Droplet size reduction was attributed to the prevention of coalescence caused by small amounts of block copolymer at the interface. The conditions under which block copolymer interfacial adsorption and interpenetration were facilitated were explained with Leibler's brush theory. © 2002 John Wiley & Sons, Inc. J Polym Sci Part B: Polym Phys 40: 346–357, 2002; DOI 10.1002/polb.10098
Bridging the gap between theory and practice: the impact of school–university partnership in a PETE program

ABSTRACT This study examined the impact of early childhood in physical education (ECPE) practicum experiences on pre-service teachers’ (PSTs) perceptions on the development of the knowledge base. Specifically, this study focused on how PSTs bridged the gap between knowledge learned during campus classes and practicum experiences in an early childhood (EC) public school. Eighteen PSTs participated in practicum experiences embedded in two ECPE courses from a physical education teacher education program in Brazil. Data collection included focus group interviews. Data analysis was conducted through thematic categorical content analysis using a hermeneutic perspective to code the internal structure of the theme and their relationships. Participants initiated their practicum experiences based on academic knowledge in ECPE. Nonetheless, the findings suggest that new knowledge was generated through multiple and repeated practical lessons within their own singularities. These contextual singularities allowed PSTs to re-elaborate their knowledge and produce new ways to respond to different teaching situations. Participants acknowledged the importance of knowledge of students, the benefits of implementing different teaching styles and the need of improving common content knowledge in ECPE. The findings of this study indicate that the partnership between university and school was an effective way to bridge the gap between theory and practice. This partnership provided identification and application of teachers’ knowledge base.
Comparison of Two Preparation Methods for Platelet-Rich Plasma Eye Drops for Release of Growth Factors and De-Epithelization Rabbit Model

Purpose To compare two platelet-rich plasma (PRP) preparation methods (double spin (D-PRP) and TriCell PRP (T-PRP)) for eye drops, concentration yields of platelets and other cells, release of growth factors, and efficacy of the de-epithelization rabbit model. Methods PRP was extracted by D-PRP and T-PRP from 30 ml blood from healthy adults. After extraction, platelets and leukocytes were counted. D-PRP and T-PRP were preserved during A: 1 h storage at room temperature, B: 1 h storage at −20°C, C: 24 h storage at 4°C, and D: 24 h storage at −20°C. Platelet-derived growth factor (PDGF) was measured. Freezing/thawing PRP eye drops and control were instilled in the de-epithelization rabbit model four times per day for 5 days. Histology was compared between eyes treated with control, D-PRP, and T-PRP. Results 14 ml of D-PRP and 4 ml of T-PRP were extracted from 30 ml whole blood samples. D-PRP and T-PRP had 41.36 ± 8.43 × 104 and 67.02 ± 13.55 × 104 platelets and 0.41 ± 0.24 × 103/ml and 10.09 ± 4.29 × 103/ml leucocytes, respectively. In the four storage methods, PDGF concentrations in T-PRP were higher than those in D-PRP eye drops. Freezing/thawing D-PRP and T-PRP increased PDGF concentrations. Histology showed corneal epithelium thickness in T-PRP-treated eyes after healing (38.41 ± 9.10 μm) was significantly higher than that in control-treated (27.77 ± 4.76 μm) and D-PRP-treated eyes (18.32 ± 3.14 μm) (P < 0.05). There was no corneal damage with inflammation in corneal stroma and epithelium of all tested groups. Electron microscopy revealed strong adhesion between cell junctions in T-PRP-treated eyes. Conclusions Freezing/thawing of PRP extracted with the T-PRP kit may result in high platelet and leukocyte concentration and produce high PDGF concentration. PRP eye drops including leucocytes could increase thickness of corneal epithelium without corneal inflammation.
Do Private Equity Investors Create Value? Evidence from the Hotel Industry

We dissect possible mechanisms of private equity (PE) value creation by studying the U.S. hotel industry. We observe acquisitions, dispositions, and granular operating performance data for several thousand hotels owned by PE and non-PE investors over the past two decades. PE-owned hotels experience only limited operating efficiency gains, and no change in bottom-line profit measures on average. Nonetheless, PE investors earn above-average capital gains on their hotel real estate investments. They do so by acting as arbitrageurs, selling to counterparties with high valuations. Finally, PE investors’ returns to equity are boosted by their superior access to cheap financing.
An experimental and theoretical study of the relation between magnetic field and current in a superconductor

The penetration depth, λ, in superconducting tin at 0° K has been found to be capable of variation by the addition of impurity, 3% of indium causing it to be nearly doubled, although the thermodynamical properties such as T c are hardly affected. It is suggested that this result throws doubt on the phenomenological theory of F. and H. London, and a new equation for the supercurrent is proposed, in which the current is related to an average of the vector potential over a region around the point considered. The size of the region is governed by a parameter ξ, which is dependent, in a similar way to the mean free path in a normal metal, on the degree of purity . The new theory agrees in a satisfactory manner with the experimental results, and also provides an explanation of the magnitude of λ in a pure metal. It has been found that the unusual anisotropy of λ in pure tin is absent in tin + 3 % indium , and this too is in agreement with the prediction of the new theory. The fact that the temperature variation of λ appears to have the same form independent of the degree of purity implies that ξ depends on temperature in the same way as λ; this result agrees with the observed behaviour of the interphase surface energy, αns, if ξ is regarded as determining the width of the interface between superconducting and normal regions. The paper ends with a discussion of the relation of the new theory to microscopic theories of superconductivity.
Stimulation of Lipid Extraction Efficiency from Sewage Sludge for Biodiesel Production through Hydrothermal Pretreatment

In this study, two types of sewage sludge (primary sludge and waste activated sludge) were hydrothermally treated at 125–250 °C to enhance the lipid extraction efficiency and obtain a higher biodiesel yield. The enhanced efficiency of the lipid extraction method was compared with the efficiency of the organic solvent extraction method. The results confirmed that a hydrothermal reaction could be an appropriate option for disrupting sludge cell walls and increasing the lipid extraction from sewage sludge. The highest lipid recovery efficiency was observed at 200 °C, and the lipid recovery efficiency of primary sludge and waste activated sludge increased from 7.56% and 5.35% to 14.01% and 11.55% by weight, respectively. Furthermore, transesterified lipids, such as biodiesel from sewage sludge, mostly consist of C16 and C18 methyl esters, and have features similar to those of jatropha oil-based biodiesel. During the hydrothermal treatment, the carbon content in the sludge decreased as the carbon transformed into lipids and the lipids were extracted. The volatile matter and fixed carbon content in the solid residue decreased and increased, respectively, through chemical dehydration and decarboxylation reactions under hydrothermal reaction conditions.
Spatial and temporal variation and the influence of environmental parameters in a fish community in the Una River, Paraíba do Sul Valley, São Paulo

Understanding of aspects of the structure of ichthyological communities and how these relate to the environment and its natural variation has been one of the principal objectives of ecological studies conducted in freshwater environments. The objective of this study was to evaluate the relationship between fish species composition in the Una River and environmental variables during dry and rainy seasons. Data collection was done along three stretches of the main channel of the Una River between April 2016 and March 2017. In general, the riverbed presented a high degree of silting in all study sites. A total of 1,534 fish specimens from thirty species were collected. There was greater richness and abundance of species during the rainy season in all sampled areas. A Partial Redundancy Analysis (pRDA) showed a significant correlation between the fish community, substrate composition, and concentrations of dissolved oxygen in the water. The qualitative structure of the ichthyofauna indicated a greater association with environmental structure than with seasonality, since there was a clear tendency for the three stretches of river to group together independent of the sampling period. There were no significant differences between the indices of diversity registered for the dry and rainy seasons. This is due to the dominance of the species Astyanax aff. bimaculatus (two spot Astyanax | lambari-do-rabo-amarelo) and Hypostomus cf. luetkeni (armoured catfish | cascudo), which represented more than half of the collected specimens during the rainy season.
Non-Isothermal Crystallization of Poly (vinylidene fluoride)/Poly (methyl methacrylate)/Cellulose Nanocrystal Nanocomposites

Poly (vinylidiene fluoride) (PVDF)/poly (methyl methacrylate) (PMMA)/cellulose nanocrystal (CNC) nanocomposites were prepared by solution blending. Non-isothermal crystallization of PVDF/PMMA (70/30) blend and its composites was investigated using differential scanning calorimetry. It was found that the addition of CNCs played a positive role in both the crystallization rate and crystallization percentage. The addition of CNCs increased the initial crystallization temperature, peak crystallization temperature, and crystalline enthalpy. The Avrami index indicated that CNCs did not change the crystallization mechanism; while other parameters derived from Jeziorny theory and Mo's method, including Z c , F(t), and α, further verified the positive role played by CNCs.
How Experts’ Opinions and Knowledge Affect Their Willingness to Pay for and Ranking of Hydrological Ecosystem Services

To ensure that ecosystem services are included in decision-making processes, many studies have relied on expert opinions and knowledge to identify, rank, and assess willingness to pay. In this study, expert opinions according to their expertise in hydrology, ecology, and sociology were surveyed and compared in terms of (1) recognition and ranking of hydrological ecosystem services (HESs) and (2) willingness to pay for HESs. The decision-making process was also investigated, specifically the rankings of factors in experts’ plans for climate change adaptation. The experts’ recognition of and opinions concerning HESs were positively correlated at various levels with intention to pay (i.e., whether respondents were willing to pay for HESs). Most experts recognized the importance of HESs and allocated high average scores of 9.15, 8.17, and 8.41 to water yield, sediment export, and nutrient export, respectively, using a scale from 1 (least important) to 10 (most important). The percentage of sociologists (100%) exhibited greater intention to pay than those of hydrologists (70%) and ecologists (93%), respectively. Experts prioritized environmental impact over economic cost in policy decision-making, and they differed significantly by field in terms of their rankings of the functional, economic, environmental, and social considerations of decision-making. The results revealed significant differences among experts in their decision-making preferences according to their fields of knowledge. The experts of a specific study field may be more willing to pay for that than for another. Greater intellectual exchange and analysis among experts should be implemented and diverse expert opinions should be solicited in policy decision-making.
Simulation of Diffusion Bonding of Different Heat Resistant Nickel-Base Alloys

Currently, an important fundamental problem of practical importance is the production of high-quality solid-phase compounds of various metals. This paper presents a theoretical model that allows one to study the diffusion process in nickel-base refractory alloys. As an example, a two-dimensional model of ternary alloy is considered to model diffusion bonding of the alloys with different compositions. The main idea is to divide the alloy components into three groups: (i) the base element Ni, (ii) the intermetallic forming elements Al and Ti and (iii) the alloying elements. This approach allows one to consider multi-component alloys as ternary alloys, which greatly simplifies the analysis. The calculations are carried out within the framework of the hard sphere model when describing interatomic interactions by pair potentials. The energy of any configuration of a given system is written in terms of order parameters and ordering energies. A vacancy diffusion model is described, which takes into account the gain/loss of potential energy due to a vacancy jump and temperature. Diffusion bonding of two dissimilar refractory alloys is modeled. The concentration profiles of the components and order parameters are analyzed at different times. The results obtained indicate that the ternary alloy model is efficient in modeling the diffusion bonding of dissimilar Ni-base refractory alloys.
Minimization of Global Adjustment Charges for Large Electricity Customers Using Energy Storage—Canadian Market Case Study

Recently, the interest in utilizing energy storage systems (ESSs), particularly batteries, has increased. ESSs are employed for several enhancement tasks in power systems on both the operation and planning scales. On the operation side, ESSs play a main role in offering several ancillary services. In the context of planning, ESSs are used for asset upgrade deferral among other grid applications. This work employs a battery energy storage system (BESS) to minimize the electricity bill charges associated with global adjustment for large consumers in the jurisdiction of Ontario, Canada. An optimization formulation for sizing and scheduling the BESS, to minimize the utility charges and gain profits from other revenue streams, such as energy price arbitrage (EPA), was developed and implemented. The results show the economic feasibility of the developed algorithm to minimize the annual bills of real customers and gain profits. A sensitivity analysis was also carried out to show the potential of the proposed method in providing significant benefits and gains for customers.
Homoclinic orbits and Jacobi stability on the orbits of Maxwell–Bloch system

In this paper, we analytically and geometrically investigate the complexity of Maxwell–Bloch system by giving new insight. In the first place, the existence of homoclinic orbits is rigorously proved by means of the generalized Melnikov method. More precisely, for 6a−2b>c and d>0, it is certified analytically that Maxwell–Bloch system has two nontransverse homoclinic orbits. Secondly, Jacobi stability on the orbits of Maxwell–Bloch system is examined in view point of Kosambi–Cartan–Chern theory (KCC-theory). In other words, in the light of the deviation curvature tensor of the five corresponding invariant associated to the reformulated Maxwell–Bloch system, we further proved that Jacobi stability of all equilibria under appropriate parameters. Moreover, the deviation vector, as well as the curvature of the deviation vector near equilibrium points, is focused to interpret the chaotic behavior of Maxwell–Bloch system in Finsler geometry.
What Factors Influence Perceptions About Animal-Assisted Therapy?

ABSTRACT Animal-assisted therapy (AAT) has gained popularity within K-12 schools for the emotional-social support, academic support, and sense of belongingness animals provide, however, concerns still arise despite documented potential benefits. This exploratory cross-sectional, quantitative study examined the knowledge, attitudes, and experiences of school counselors and school nurses with AAT to determine potential risks and benefits of AAT in schools. The REHAB Basel Questionnaire was utilized with 426 participants in the survey; school nurses (N = 228, 54%) and school counselors (N = 198, 47%). Results indicated canine ownership, role within schools, and region affected participants’ responses. Future research may seek to focus on establishing guidelines for the implementation of AAT in K-12 schools.
Molecular diffusion of volatile-liquid vapors into air

Diffusion coefficients of vapors diffused into stagnant air were determined at room temperature and atmospheric pressure. Experimental data on diffusion coefficients were obtained from the steady-state open-tube evaporation method modified for this study. No fresh air is passed over the top end of a diffusion tube, and amounts of volatile liquids evaporated in the diffusion tube are measured with a balance rather than a change of the liquid level in a diffusion tube. Experimental molecular diffusion coefficients are obtained by applying experimental data of mass losses of volatile liquidsversusevaporation durations to a diffusion equation developed suitable for the novel open-tube evaporation method. Three main experimental errors of the novel open-tube evaporation method are described in detail. Predicted diffusion coefficients are calculated with the Wilke-Lee method and compared with experimental values obtained from this diffusion study.