Miracle-dz/UniFAR-FTUs huggingface dataset:
Residual stress and nanomechanical properties of sonoelectrodeposited Cu films

Knowledge of internal stresses in thin copper film structures is essential in understanding the film properties, such as stress migration, adhesion, hardness and elasticity. Internal stresses and nanomechanical properties in thin copper films were investigated by the curvature method, nanoindentation and atomic force microscope. Variations in the abovementioned parameters were studied with decreasing deposition temperature for the films. Irrespective of deposition temperature, the stress was observed to be compressive and increased at low electrolyte temperatures. Hardness and elasticity of the films were found to be increased with reduced deposition temperature. With increasing compressive stress, the hardness of the films increased. The surface adhesion of the film deposited at 5°C was minimum, indicating increased cleanliness and chemical stability with low deposition temperatures.
The Probability of Non-ruin of an Insurance Company with Advertising Expenses by MHull Insurance of 10 Top Insurance companies of Ukraine. I.

A main result of the paper is constructing an equation that allows calculating the probability of non-ruin for the classical model of risk when an insurance company has promotional costs. Some numerical results for the probability of non-ruin by MHull of 10 Top Insurance companies of Ukraine for the period 01/01/2015 to 06/30/2015 based on the developed formulae are provided. Some conclusions about the influence of advertising company on the probability of non-ruin were carried out. The first part of the paper analyses the model without investments in financial (B,S)-market, the second one will deal with investments on this market.
An Integrated Framework for Power-Performance Analysis of Parallel Scientific Workloads

The path towards Exascale systems will require to energetically address power consumption of future high performance computing (HPC) workloads which, in turn, urges for a better understanding of power usage. In this paper we, present an evolved framework to trace and analyze the power and energy consumption made by parallel scientific applications. The framework includes i) a flexible and extensible design that enables easy integration of different types of power measurement devices and addition of new functionality; ii) a new module that records information on processor states related to power consumption; and iii) an improved power measurement device to monitor internal direct current (DC) power consumption. This environment is thus revealed as a powerful yet easy-to-use tool to investigate and progress on the development of energy-efficient HPC applications. Keywords-power consumption; high performance computing; performance analyzers; scientific applications;
Household Education Spending in Latin America and the Caribbean: Evidence from Income and Expenditure Surveys

This paper characterizes household spending in education using microdata from income and expenditure surveys for twelve Latin American and Caribbean countries and the United States. Bahamas, Chile, and Mexico have the highest household spending in education and Bolivia, Brazil, and Paraguay have the lowest. Tertiary education is the most important form of spending, and most educational spending is performed for 18- to 23-year-old individuals. More educated and wealthier household heads spend more in the education of household members. Households with both parents present and those with a female main income provider spend more than their counterparts. Urban households also spend more than rural households. On average, education in Latin America and the Caribbean is a luxury good, whereas it may be a necessity in the United States. No gender bias is found in primary education, but at secondary school age and up households invest more in females than in males.
High-pressure and high-temperature sintering of nanostructured bulk NiAl materials

Nanostructured bulk NiAl materials were prepared at high pressure and temperature (0–5.0 GPa and 600–1500 °C, respectively). The sintered samples were characterized by x-ray diffraction, scanning electron microscope, density, and indentation hardness measurements. The results show that NiAl nanoparticles may have a compressed surface shell, which may be the reason why NiAl nanomaterials were difficult to densify sintering using conventional methods and why high-pressure sintering was an effective approach. We also observed that B2-structured NiAl could undergo a temperature-dependent phase transition and could be transformed into Al_0. 9Ni_4. 22 below 1000 °C for the first time. It is interesting to note that Vickers hardness decreased as grain size decreased below ∼30 nm, indicating that the inverse Hall-Petch effect may be observed in nano-polycrystalline NiAl (n-NiAl) samples. Moreover, a tentative interpretation was developed for high-pressure nanosintering, based on the shell-core model of nanoparticles.
Phylogenetic Identification of Two Extremely Halophilic Archaeon Isolated from Raw Hide and Investigation of Their Lipolytic Activities

This research serves two different purposes. Primarily, two extremely halophilic archaeons were isolated from salted raw hide samples and were phylogenetically identified by 16S rRNA sequence analyses. It was determined that isolate 1 shared similarities with Halomicrobium zhouii strain 144 and isolate 2 with Haloarchaeon strain 129. These results were substantiated by some phenotypic analyses. Both strains displayed Gram-negative reactions and they were susceptible to the antibiotics bacitracin and novobiocin. It was qualitatively determined that they have lipolytic activity. Secondly, esterase and lipase enzyme activity conditions of the two archaea were also determined in the current study to evaluate industrial applicability of these enzymes. For the identification of quantitative esterase and lipase activities of both strains, p-nitrophenyl butyrate and p-nitrophenyl laurate substrates were used, respectively, and their activities were measured on a daily basis. After the quantitative and qualitative determination of esterase and lipase activities, esterase and lipase activities were determined at different temperatures (4-60°C), pH levels (4-11pH) and in NaCl concentrations (0-5.5M). According to daily enzyme activity results, the highest esterase and lipase values for isolate 1 were found to be 4 U/ml and 1 U/ml, respectively, on the 4th day and for isolate 2 to be 2.7 U/ml and 1.9 U/ml, respectively, on the 3rd day. Furthermore, the maximum esterase activity for isolate 1 was elicited at 35°C, pH 8 and in 2.5 M NaCl, and for isolate 2 at 35°C, pH 7 and in 3 M NaCl. Moreover, the maximum lipase activity for isolate 1 was explored at 40°C, pH 7.0 and 2.0-3.5 M NaCl, and for isolate 2 at 35°C, pH 7.5 and in 2 M NaCl. Optimal conditions for both extreme halophilic Archaea was determined as the data may be considered for the production of industrial enzymes. Therefore, this research is an exemplary study as well as a small-scoped survey which includes the two goals mentioned above and only focuses on two archaea on salted raw hides.
Polyphenols extraction from plant sources

Different conventional (maceration and heat-assisted extraction) and new alternative techniques (ultrasound-assisted and microwave-assisted extractions) have been developed for the extraction of polyphenols compounds from different plant sources. Novel procedures have established with the aim to reduce the extraction time and solvent consumption, as well as to increase polyphenols yield and to improve extract quality. A critical review was conducted to introduce and compare traditional and modern procedures applied for extraction of bioactive polyphenols compounds. This review focuses on the different techniques of polyphenols extraction, discussing their operating conditions, mechanism, choice of particle size and solvent, solid/solvent ratio, extraction time, advantages/disadvantages and effectiveness. Finally, potential application of these extraction procedures in polyphenols isolation is reviewed.
Detection of planetary signals by reflected light of the host star using the autocorrelation of spectra

We consider an alternative to the cross-correlation function (CCF), that uses the autocor- relation function (ACF), to measure in spectra the reflected light of the stars by their planetary companion. The objective of this work is to assess and analyse the efficiency of the ACF in detecting planetary signals by a detection of reflected light. To do so, we first compare the ACF and the CCF using artificial spectra containing a planetary signal. We then use the ACF to analyse spectra of the 51 Peg + 51 Peg b system and compare our results with those obtained by Martins et al. (2015) who previously analysed the same system using the CCF. The functionalities of the ACF and the way it is implemented are similar to that of the CCF. One of the main advantages of the ACF is the fact that, unlike the CCF, no weighted binary mask is required. This makes the ACF easier to use. The results related to simulated spectra showed that the ACF allowed us to decrease the boundary condition threshold for the use of spectra compared to the CCF so that more data could be used to recover the planetary signal. For the 51 Peg b planet, we achieved a detection significance of 5.52 {\sigma}noise with the ACF compared to 3.70 {\sigma}noise with the CCF (Martins et al. 2015). We conclude that the ACF has the potential to become a prominent technique in detecting exoplanets considering its efficiency, ease of use and rapid execution time.
Brokerage discovery in social networks

In social networks two types of measures can be identified, the structural measures and community structure based on diameter and centrality. The community structure usually deals with network partition into communities. The key idea of this work is to explore the concept of strong and weak ties by finding brokers within communities. The strict partition problem is relaxed into a bi-objective set covering problem with k-cliques which allows over-covered and uncovered nodes. The information extracted from social networking goes beyond cohesive groups, allowing the finding of brokers that interact between groups.
Big data analytic untuk pembuatan rekomendasi koleksi film personal menggunakan Mlib. Apache Spark

Introduction. The digital age is characterized by the explosion of digital information that creates problems in information retrieval. Search engines have a weakness in the keywords/queries that users can remember. Recommendations arise as solutions to provide personal information. Data Collection Method. In this paper, the researcher presented a recommendation engine model using dataset from movielends.org. Analysis Data. Alternating Least Square-Weight Regulation (ALS-WR) was used as a big data analytic algorithm in rating prediction and Cosine Similiarity as the second filter to bring items closer to the genre. Results and Discussions.The results of Root Mean Squared Error (RMSE) from 100K datasets were 0.96 (validation) and 0.94 (test). The results RMSE from 1M dataset were 0.86 (validation) and 0.96 (test). The results RMSE from 10M dataset were 0.81 (validation) and 0.81 (test). The result cosine similarity was 1 for 100% resemblance and it decreased based on the similarity level. The user acceptance test was 28% user accepts the result of first recommendation, this value increased to 62% acceptance level of the user against the second recommendation. Conclusions. The final results show that 75% of respondents prefer the second recommendation from two-stage filtering than just collaborative filtering.
Authentic assessment of students' problem solving

Improving curricular materials and practices aimed at complex cognitive processes such as problem solving requires careful planning and useful tools for assessment. To illustrate the challenges of measuring a change in students’ problem solving in physics, we present the results of and a reflection on a pilot assessment of the effectiveness of computer problem-solving coaches [1] in a large (200+ student) section of an introductory physics course.
Properties of dand k-type roughness in a turbulent channel flow

Roughness is classified by the so-called roughness function, which represents the downward shift of the velocity profile relative to a smooth wall. The dependence of the roughness function on the Reynolds number is discussed with the aim of clarifying the difference between d-type and k-type behaviors. This difference has been traditionally associated with the stability of the flow within the roughness elements. The present direct numerical simulation results indicate that the difference more correctly reflects the different contributions from the frictional drag and pressure drag to the total stress. © 2007 American Institute of Physics. DOI: 10.1063/1.2821908
In Pursuit of Enhanced Customer Retention Management: Review, Key Issues, and Future Directions

In today’s turbulent business environment, customer retention presents a significant challenge for many service companies. Academics have generated a large body of research that addresses part of that challenge—with a particular focus on predicting customer churn. However, several other equally important aspects of managing retention have not received similar level of attention, leaving many managerial problems not completely solved, and a program of academic research not completely aligned with managerial needs. Therefore, our goal is to draw on previous research and current practice to provide insights on managing retention and identify areas for future research. This examination leads us to advocate a broad perspective on customer retention. We propose a definition that extends the concept beyond the traditional binary retain/not retain view of retention. We discuss a variety of metrics to measure and monitor retention. We present an integrated framework for managing retention that leverages emerging opportunities offered by new data sources and new methodologies such as machine learning. We highlight the importance of distinguishing between which customers are at risk and which should be targeted—as they are not necessarily the same customers. We identify trade-offs between reactive and proactive retention programs, between short- and long-term remedies, and between discrete campaigns and continuous processes for managing retention. We identify several areas of research where further investigation will significantly enhance retention management.
INDICATORS OF THE CARDIOMYOCYTES` CELLS CYCLE UNDER INFUSION OF BLOOD SUBSTITUTES AND IN THE CORRECTION OF EXPERIMENTAL BURN INJURY BY 0,9% NACL SOLUTION

According to the WHO, the thermal trauma is on the third place among other injuries. Burned injury is not only damage to the skin, but also the traumatization of all organs and systems of the body as a result of the stress response of the vascular system and the effects of toxic products coming from the area of burn injury. Firstly, such damages affect cardiomyocytes and the microcirculation vessels of the heart. The purpose of our study was to evaluate the changes in the cell cycle of myocardial cells in the left ventricle of rats under conditions of blood substitutes infusion and in the correction of experimental burn injury with a 0.9% solution of NaCl. The burn trauma was modeled using the Regas' method and placed a catheter into the lower vena cava for intravenous infusion. The following solutions were used for infusion: 0.9% NaCl solution, lactoproteinum with sorbitol (Lactoproteinum-C) and colloidal-hyperosmolar HAESLX-5% solution. Flow cytometry of the nuclear suspension of left ventricular cardiomyocytes was performed on the 1st, 3rd, and 7th days of the experiment. The statistical analysis of the results was carried out using the "STATISTICA 6.1" program package. The results of the performed study show a fairly stable picture of cell cycle parameters in myocardial cells of animals without burn injury with a predominance, on the one hand, of cells present in the G0G1 phase and the presence of a certain balance between the processes of creation of nuclear DNA synthesis and apoptosis. Changes in the phase of cardiac myocyte cell cycle against the background of the thermal injury of the skin throughout the observation time indicate a prolonged, uncorrected cell cycle disorder and a lack of effective normalization on the background of the physiological solution usage in the first 7 days after burning trauma of the skin. The protective effect of HAES-LX-5% prevents over-strain of cells, as evidenced by the lower synthetic activity of nuclei of cardiomyocytes at all times of the experiment.
A MULTI-CRITERIA DECISION-MAKING APPROACH THAT COMBINES FUZZY TOPSIS AND DEA METHODOLOGIES

Employee selection is a multi-criteria decision-making (MCDM) problem for selecting suitable applicants from a ready pool. The selection aims to make use of their knowledge, relevant skills, and other characteristics to perform a specific job. The aim of this study is to develop a systematic approach for selecting the best candidates among the air traffic controllers (ATCs) for aviation in Saudi Arabia. Three integrated methods were employed for decision-making in this study. First, a fuzzy decision tree was applied to determine the criteria weights, then the fuzzy Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) was employed to rank the attributes. In the last step, the Data Envelopment Analysis (DEA) was used to transform the qualitative variables into quantitative equivalences. A survey was conducted by national and international decision- makers to elicit the necessary information on the criteria and sub-criteria of the air traffic control system. The decision problem was formulated by employing five criteria and ten applicants. The relationship between the fuzzy TOPSIS and fuzzy-weighted average was very positive for decision-making. The outcomes of the fuzzy TOPSIS and DEA encouraged the development of a decision support system for the selection of ATCs.
Corporate Governance: Board of Directors' Strategic Role and Its Influence on Financial Function Automobile Companies registered and listed in Stock Exchange of Tehran

Corporate governance is a crucial factor for efficiency and productivity improvement in any economy and economical system. It characterizes a set of mutual contacts and interactions among board of directors, corporate management, shareholders, and other stakeholders. Corporate governance provides a structure for development of corporate goals, facilities to accomplish those objectives, and means to supervise and watch over the corporate performance. Corporate governance mechanisms are important for company performance. This study investigates the internal mechanisms applied by board of directors and their effects on financial performance by strategic planning. It uses a case study of automobile corporations registered and listed in Tehran Stock Exchange. The role of directors' board in strategic management is decided and determined by their extent of involvement and participation in strategic planning. In order to measure the directors' board role in strategic management, this study employed a questionnaire prepared based on Hunger-Wheelen and Nadler Models. This questionnaire was distributed to 105 board members of auto companies listed in Tehran Stock Exchange. 75 questionnaires from 78 respondents were included in this study. The financial performance (Tobin's Q) was calculated based on corporate balance sheets. The findings of this study showed a significant relation between the board of directors' role in strategic management and financial performances. It means that board of directors with catalyst role, active participation, or nominal participation in strategic management had positive effect on corporate financial performance. In contrary, board of directors with minimal review, rubber stamp, or phantom roles in strategic management had negative effect on corporate financial performance. (Mahmoud Manouchehri Amoli, Ghasem Esmaeili. Corporate Governance: Board of Directors' Strategic Role and Its Influence on Financial Function Automobile Companies registered and listed in Stock Exchange of Tehran. J Am Sci 2013;9(12s):31-38). (ISSN: 1545-1003). http://www.jofamericanscience. org . 4
A Case Study in the Application of Design Structure Matrix for Improvement of Policy Formulation in Complex Industrial Wastewater Treatment

Designing effective and acceptable policy is a non-trivial task for decision makers and stakeholders. Especially, policy formulation related to environmental management is still a serious challenge. It requires development of new tools to support better understanding of the complexities involved in addressing problems and finding the best solutions. We believe that using a systematic approach to design public policies helps to model the structure of complex policies, which can drive the whole system structure of organization management towards sustainability. A case study in policy formulation and analysis related to a large industrial wastewater treatment plant in Brazil is presented. The results obtained from the morphological analysis are used in the formulation of policy alternatives through the application of design structure matrix. The results have the potential to further promote the use of modeling tools in the formulation of policies for improvement of policy performance and effectiveness for different areas.
Evidence of X-Ray Synchrotron Emission from Electrons Accelerated to 40 TeV in the Supernova Remnant Cassiopeia A

We present the 2-60 keV spectrum of the supernova remnant Cassiopeia A measured using the Proportional Counter Array and the High Energy X-Ray Timing Experiment on the Rossi X-Ray Timing Explorer satellite. In addition to the previously reported strong emission-line features produced by thermal plasmas, the broadband spectrum has a high-energy “tail” that extends to energies at least as high as 120 keV. This tail may be described by a broken power law that has photon indices of Γ1 = 1.8+ 0.5−0.6 and Γ2 = 3.04+ 0.15−0.13 and a break energy of Eb = 15.9+ 0.3−0.4 keV. We argue that the high-energy component, which dominates the spectrum above about 10 keV, is produced by synchrotron radiation from electrons that have energies up to at least 40 TeV. This conclusion supports the hypothesis that Galactic cosmic rays are accelerated predominantly in supernova remnants.
Chemical, isotopic and enzymatic monitoring of free and enclosed seawater : implications for primary production estimates in incubation bottles

Enclosing seawater samples in incubation bottles had 3 main effects on the phytoplankton: first, a large (5-fold in 12 h) increase of phytoplankton biomass, due to the release of grazing pressure by herbivores, Second, an increase (2-fold in 6 h) in ribulose biphosphate carboxylase specific activity (per unit chlorophyll a), which could be due to a smaller dependence on regenerated production (less heterotrophy on excreted compounds). This was also supported by a tight relationship between phosphoenol pyruvate carboxykinase activity and dissolved ammonium. Finally, the large changes in the carbon isotopic composition of the incubated particulate matter, which were highly dependent on the dissolved inorganic nitrogen concentration, were due mainly to physiological processes such as biochemical fractionation rather than physical processes such as CO2 limitation. For environments with high phytoplankton growth rate and high grazing pressure, a duration of incubation greater than 3 h may significantly change the physiology of the organisms and lead to different estimates of carbon assimilation by autotrophs than bulk water estimates.