Miracle-dz/UniFAR-FTUs huggingface dataset:
Stabilisation of Ce-Cu-Fe amorphous alloys by addition of Al

Abstract The present work describes the formation of amorphous alloys in the (Al1−xCex)62Cu25Fe13 quaternary system (0 ≤ x ≤ 1). When the amount of Ce falls in the range 0.67 ≤ x ≤ 0.83, the alloys obtained exhibit a completely amorphous structure confirmed by powder X-ray diffraction. Otherwise, at compositions x = 0.5, 0.58, 0.92 and 1, a primary crystalline phase forms together with an amorphous matrix. The crystallisation temperature (Tx) decreases with increasing Ce content, varying from 593 K for x = 0.5–383 K for x = 1. Composition x = 0.75 is considered as the best glass former, exhibiting a large supercooled liquid region of 40 K width that precedes crystallisation. In order to form bulk amorphous alloys, ribbons with this later composition were consolidated into few millimetre thick discs using pulsed electric current sintering at different temperatures, yet preserving the amorphous structure. Meanwhile, increasing temperature above 483 K triggers crystallisation of a primary phase isostructural to AlCe3. Further increase in the temperature up to 573 K yields a higher fraction of the crystalline phase. Testing mechanical properties, using nanoindentation, revealed that both elastic modulus (E) and hardness (H) depend on the Al content, ranging from E = 85.6 ± 3.7 GPa and H = 6.2 ± 0.7 GPa for x = 0.5 down to E = 39.8 ± 1.0 GPa and H = 3.1 ± 0.2 GPa for x = 0.92.
Changes in white blood cell, red blood cell and platelet parameters following short term aerobic exercise in students of Nnamdi Azikiwe University, Nigeria

Background: Haematological changes have been associated with physical activity (exercise) and these changes have been found to involve leucocytes, red blood cells and thrombocytes depending on variables such as the duration and intensity of the exercise. Objective: This experimental pre-post test study was designed to assess the changes in white blood cell, red blood cell and platelet parameters following short term exercise. Method: A total of 30 participants with an average age of 23.8 ± 1.98 years participated in the standard treadmill exercise (Bruce protocol) for 30 minutes on voluntary basis. Blood samples were collected from the subjects before exercise, immediately after exercise and 24 hours after exercise. Hematological parameters were analyzed using hematology auto-analyzer. Height, weight, body mass index and blood pressure of the participant were measured. Ethical approval was obtained from the Ethics committee of Faculty of Health Sciences and Technology and informed consent of the participants were obtained. Statistical Package for Social Sciences version 21 was used for statistical analysis. Results: The platelet count significantly increased post-exercise compared to pre-exercise and decreased 24hours post-exercise compared to postexercise value. Conversely, the Platelet distribution width (PDW) significantly decreased at post-exercise compared to pre-exercise, and significantly increased at 24hours post exercise compared to post-exercise value. Moreover, there was a significant increase in Mean platelet volume (MPV) at 24hours post-exercise compared to post exercise and a significant decrease in Plateletcrit (PCT) at 24hours post-exercise compared to post-exercise. At post-exercise and 24hours post-exercise, the total lymphocyte count was significantly higher in females while the granulocyte count was significantly higher in males. Also at 24 hours post exercise the MCHC was significantly higher in females compared to males. At post-exercise, there was a significant positive correlation between BMI and MCH (r=0.512, P=0.004) and BMI and MCHC (r=0.553, P=0.003) while there was a significant negative correlation between BMI and MPV (r=-0.367, P=0.046). Conclusion: Short term exercise causes significant alterations in platelet parameters than other hematological parameters.
Analysis of Amino Acid Sequence of SARS-CoV, SARS-CoV-2, and MERS-CoV Spike Glycoproteins: Preliminary Study for Obtaining Universal Peptide Vaccine Candidates

In the manufacture of universal peptide vaccines, it is necessary to analyze the amino acids of the various candidates. Therefore, this study aims to examine the amino acids of the spike glycoproteins of SARS-CoV, SARS-CoV-2, and MERS CoV. The method used is the alignment of the amino acid spike glycoprotein between SARS-CoV with SARS-CoV-2, MERS CoV with SARS-CoV-2, and SARS-CoV with MERS-CoV using web-based software water emboss. The analysis result showed that SARS and SARS CoV-2 were very similar with 87% similarity and 76.4% identity values. In contrast, SARS-CoV-2 with MERS and SARS with MERS were very different, having similarity and identity values of less than 70%. Therefore, it is reasonable to conclude that spike glycoprotein's peptide is only useful from attacks by the SARS-CoV and SARS-CoV-2 viruses.
Co-creation in North American and European digital native media: Web, social networks and offline spaces

Organisations from various productive sectors are increasingly involving their audiences in their co-creation processes, both for production and for the ideation and marketing of the products they offer. This research analyses this issue in native digital newspapers, offering a comparative perspective between Europe and the United States. The co-creation options that these newspapers, developed on and for the internet, provided to their readers, are investigated in the three scenarios in which it is possible to co-create: via web, social networks and offline spaces. The findings indicate that the spaces enabled for co-creation are still residual and that the media should continue to value citizen’s contributions, and carrying on incorporating those contributions within their agendas, thus protecting freedom of expression, as well as the right to receive truthful information.
Evaluation of optimum inclusion levels of biostrong® 510 15% as a replacement for antibiotic growth promoters in broiler chicken production under field conditions in Nigeria

An experiment was conducted to evaluate the efficacy of Biostrong® 510 15% (BSG) inbroiler chickens diet. It was included at 0 g, 75 g, 100 g and 125 g/100 Kg diet, for T1-T4respectively while T5 had Oxytetracycline. Data was collected on growth performanceindices, haematological parameters, liver function indices, kidney function, blood mineralprofile, immune response, antioxidant capacity, villi morphometrics, lipid profile, ileum andceacum microbial contents, carcass quality parameters, and tibia bone quality indices. Alldata collected were subjected to analysis of variance and significant differences amongtreatment means were compared using the Tukey test of significance. Growth erformance showed that broilers fed diet containing 100g BSG had optimum performance among other levels. Haematological and liver function indices were not significantly (P>0.05) different. Birds fed BSG showed decreased cholesterol, triglycerides and high-density lipoprotein compared to the control treatment. Birds fed levels of BSG and AGP had significantly higher bone weight, bone density, bone dry matter and bone ash as compared to birds on the control group. All carcass evaluation parameters were significantly (P<0.05) different among treatments except for dressed weight, breast and kidney. Levels of BSG in the diet significantly lowered the cost of production than AGPs of finisher broilers improved liver health, bone strength, villi characteristics, increased beneficial bacteria population and also prevent the colonization of the gut by pathogenic bacteria thus improving the health of the birds. Biostrong® 510 15%, can therefore effectively replace antibiotic growth promoters in broiler chicken production.
Performance of Supercritical CO2 Power Cycle and Its Turbomachinery with the Printed Circuit Heat Exchanger with Straight and Zigzag Channels

Since printed circuit heat exchangers (PCHE) are the largest modules of a supercritical carbon dioxide Brayton cycle, they can considerably affect the whole system’s performance and layout. Straight-channel and zigzag-channel printed circuit heat exchangers have frequently been analyzed in the standalone mode and repeatedly proposed for sCO2−BC. However, the impact of heat exchanger designs with straight and zigzag-channel configurations on the performance of the cycle and its components, i.e., the turbine and compressor, has not been studied. In this context, this study evaluates the effect of different heat exchanger designs with various values of effectiveness (ϵ), inlet Reynolds number (Re), and channel configuration (zigzag and straight channel) on the overall performance of the sCO2−BC and its components. For the design and analysis of PCHEs, an in-house PCHE design and analysis code (PCHE-DAC) was developed in the MATLAB environment. The sCO2−BC performance was evaluated utilizing an in-house cycle simulation and analysis code (CSAC) that employs the heat exchanger design code as a subroutine. The results suggest that pressure drop in PCHEs with straight-channel configuration is up to 3.0 times larger than in PCHEs with zigzag-channel configuration. It was found that a higher pressure drop in the PCHEs with straight channels can be attributed to substantially longer channel lengths required for these designs (up to 4.1 times than zigzag-channels) based on the poor heat transfer characteristics associated with these channel geometries. Thus, cycle layouts using PCHEs with a straight-channel configuration impart a much higher load (up to 1.13 times) on the recompression compressor, this in turn, results in a lower pressure ratio across the turbine. Therefore, the overall performance of the sCO2−BC using PCHEs with straight-channel configurations is found to be substantially inferior to that of layouts using PCHEs with zigzag-channel configurations. Finally, optimization results suggest that heat exchanger’s design with inlet Reynolds number and heat exchanger effectiveness ranging from 32 k to 42 k and 0.94>ϵ>0.87, respectively, are optimal for sCO2−BC and present a good bargain between cycle efficiency and its layout size.
Traffic Information Enrichment: Creating Long-Term Traffic Speed Prediction Ensemble Model for Better Navigation through Waypoints

Traffic speed prediction for a selected road segment from a short-term and long-term perspective is among the fundamental issues of intelligent transportation systems (ITS). During the course of the past two decades, many artefacts (e.g., models) have been designed dealing with traffic speed prediction. However, no satisfactory solution has been found for the issue of a long-term prediction for days and weeks using the vast spatial and temporal data. This article aims to introduce a long-term traffic speed prediction ensemble model using country-scale historic traffic data from 37,002 km of roads, which constitutes 66% of all roads in the Czech Republic. The designed model comprises three submodels and combines parametric and nonparametric approaches in order to acquire a good-quality prediction that can enrich available real-time traffic information. Furthermore, the model is set into a conceptual design which expects its usage for the improvement of navigation through waypoints (e.g., delivery service, goods distribution, police patrol) and the estimated arrival time. The model validation is carried out using the same network of roads, and the model predicts traffic speed in the period of 1 week. According to the performed validation of average speed prediction at a given hour, it can be stated that the designed model achieves good results, with mean absolute error of 4.67 km/h. The achieved results indicate that the designed solution can effectively predict the long-term speed information using large-scale spatial and temporal data, and that this solution is suitable for use in ITS.
Can Human Resource Practice and Job Characteristics Increase Employee Engagement and Organizational Commitment? Empirical Study from a Coal Mining Company in Indonesia

Management theories that exist at either the micro or the macro level predict that investments in human resource (HR) management can improve corporate performance (Crook et al., 2011). These theories imply that HRs are important elements in influencing the course of an organization. Currently, humans are often viewed as assets of an organization. Thus, investments in HRs create positive effects on both individual and organizational performance (Crook et al., 2011). However, to create and sustain above-average organizational performance, having competent Abstract
Formation of perfectly aligned nitrogen-vacancy-center ensembles in chemical-vapor-deposition-grown diamond (111)

Selectively aligning a nitrogen-vacancy (NV) ensemble in diamond is an important technique for obtaining a high-sensitivity magnetic sensor. Nitrogen-doped diamonds were grown on (111) substrates by microwave plasma chemical vapor deposition to perform the selective alignment of high-density NV ensembles, yielding perfectly aligned NV ensembles along the [111] direction with a density greater than 1016 cm−3 and a spin relaxation time of 2 µs. Such alignment results in a high signal contrast with an optical magnetic resonance close to the typical value reported with an isolated NV center. These results indicate the possibility of achieving a high sensitivity through the selective alignment of NV ensembles.
Enhancing Students’ Learning Activity and Outcomes via Implementation of Problem-based Learning

To prove the credibility of empirical and theoretical claims about the ties between problem-based learning (PBL) and educational outcomes, this study investigates the role of PBL as a teaching model to enhance students’ learning activities and outcomes in South Sulawesi located in rural Indonesia. The study subjects included first graders at a junior high school who achieved lower levels academically than pupils in other regions. This study involved classroom activities conducted in two cycles, each comprising routine of planning, action, observation, and reflection. Observation sheets and evaluation tests were used to measure students’ learning activities and outcomes. The data were subjected to qualitative and quantitative analyses. The results showed that the students’ learning activities and outcomes in biology class were improved from the first to the second cycle, suggesting successful resolution of students’ difficulties and enhanced performance. In addition, teachers improved their effectiveness by implementing PBL, even though they lacked prior knowledge. Therefore, this study may be useful for practitioners especially teachers administering PBL. PBL is an effective approach that may be incorporated into teaching curriculum by science teachers.
The Effect of Out of Plane Perpendicular Beams on the Ductility Demand of Steel Moment Framed Structures during Progressive Collapse

Unexpected loading, induced by severe earthquake or blast, could cause local damage to a structure. In this case, the structure has the potential of progressive collapse phenomenon. Hence, further consideration is required to mitigate the consequences of such loading. This study is aimed to evaluate the progressive collapse capacity of steel moment frames with different heights under column removal conditions. Seven and twelve story buildings modeled in different conditions in order to view effects of various parameters like the out of plane frames, column removal location, and the height of buildings in the results. One of the middle column and/or the corner columns is removed in order to evaluate the effect of column removal location in response of structures. The General Services Administration and the Department of Defense guidelines are considered for defining load combination for the analysis of the collapse. Nonlinear dynamic analysis is conducted in order to obtain the ductility demand of structures when the out of plane effect is considered. The structures have welded cover plate connections, designed for high-seismic zone area. For evaluating the response of the structures, for each connection at the point of column removal, maximum vertical displacement is measured. For Finite Element analysis, a sub-assemblage of structures is modeled using ABAQUS software and the ability of beams deformation and its out of plane effect is measured.
Determination of Preservice Science Teachers’ Perceptions towards Scientists

The aim of the research is to determine the perceptions of preservice science teachers, participated course named History and Nature of Science taught with explicit-reflective approach, towards scientists. It is also to reveal the expectations of participants from the scientists in the context of social contribution. For this aim the study is planned in a phenomenological design. Participants of the study consisted of 32 science teachers who were studying in the 3rd grade. In the research process, video demonstrations, lecturing by questioning and answering methods, article review studies, activities related to the nature of science and sharing reflections about the activities were done. In this way, participants were provided with the necessary prerequisite knowledge within the scope of the study. Drawing, “A New Society” activity questions and structured interview form were used as data collection tools. Content analysis technique was used in the analysis of the data obtained in the study. As a result of the analysis of the data, preservice teachers' perceptions about scientists were found to be compatible with the literature in the categories of physical and personal characteristics, study areas, working environments and social contribution of scientists. However, differently the literature, scientists' perceptions regarding their gender are perceived equally rates for women and men.
Investigating the relationship between integrated reporting and firm performance in a voluntary disclosure regime: insights from Bangladesh

PurposeThe purpose of this study is observing the disclosure pattern of integrated reporting (IR) and investigating its relationship with a firm's operational, financial and market growth performance measured in the form of return on assets (ROA), return on equity (ROE) and market-to-book value ratio respectively in the voluntary disclosure regime of Bangladesh.Design/methodology/approachThis research is quantitative, based on a pooled-OLS regression analysis of 20 firms listed under ten different nonfinancial industries of the Dhaka Stock Exchange (DSE) for three financial years from 2015–2016 to 2017–2018, with 60 firm-year observations. A manual content analysis based on a structured integrated reporting disclosure index (IRDIN) measures the extent of disclosure in the corporate annual reports. The practical model consists of the dependent variable IRDIN and the independent variables ROA, ROE and market-to-book value ratio. The natural logarithm of total assets and financial leverage are the two controlling variables used in the model.FindingsThe findings deduced from the empirical results indicate that the IRDIN is positively and significantly related to all three performance variables. Content analysis shows an increasing pattern of disclosure of the constructed index elements by the sample firms.Research limitations/implicationsA Small sample size may deter the generalization of the research findings in other voluntary disclosure regimes. Self-constructed IRDIN index scores may be affected by subjective judgment while assessing the annual reports.Practical implicationsCapital market regulators can gain valuable insights regarding the suitability of implementing IR in Bangladesh as the results show a positive relationship of firm performance with the adoption of this revolutionary paradigm in corporate reporting.Originality/valueThis study adds value to the existing limited literature of IR disclosure and firm performance in Bangladesh by incorporating content analysis and regression analysis to understand how firms respond to the demand of value creation by the stakeholders in a voluntary disclosure regime. This study captures sample firms from all the nonfinancial industries of Bangladesh with a unique IR index, which is the first of its kind.
Effect of Nano Fertilizers on Growth, Yield and Economics of Tomato Variety Arka Rakshak

The experiment was conducted by Krishi Vigyan Kendra, Jajpur in collaboration with IFFCO, Jajpur in the farmer , s field of village Dihakuransa, Block Rasulpur of Jajpur District of Odisha to study the effect of Nano fertilizers on growth, yield and economics of Tomato variety Arka Rakshak in Rabi season 2019. The experiment was laid out in randomized block design (RBD) five treatments and five replications. Treatments involved were T1 Farmers Practice (FP) ( 100% NPK + 100 % Zn application ), T2 FP (50% N+100% PK+100% Zn ) + two sprays of Nano N , T3 – FP (100 % NPK + 50 % Zn ) + two sprays of Nano Zinc, T4 – FP (100% NPK + 100% Zn) + two sprays of Nano Cu) , T5 FP ( 50 % N + 100 % PK + 50 % Zn ) + 1 st spray Nano N + 2 nd spray Nano Zn + 3 rd spray Nano Cu @ 4ml / lit water each. First spraying was done 20 days after transplanting, 2 nd spraying at 15 days after 1 st spraying and 3 rd spraying was done 10days after 2 nd spraying. From the experiment it was observed that application of T5 produced maximum plant height (122.45cm), No. of branches per plant (12.4), fruit length (7.15cm), fruit girth (5.32cm), maximum number of fruits per plant (64.03), individual fruit weight (66.48g) and highest Yield per ha. (425.24q) followed by T2 (414.32 q/ha), T3 (409.28 q/ha) and T4 (407.42 q/ha). Lowest yield was found in T1 (398.20 q/ha) where RDF was 175:150:175 kg NPK per ha. Application of T5 ie. FP (50 % N + 100 % PK + 50 % Zn) + 1 st spray Nano N + 2 nd spray Nano Zn + 3 rd spray Nano Cu recorded highest gross income of Rs 2,12,620 / ha with net return Rs 1,59,720 / ha and maximum benefit cost ratio 4.01. NNitrogen, PPhosphorus, KPotash, ZnZinc, Cu-Copper.
Means of Control in the Organization of Digitally Intermediated Care Work

Digital platforms that facilitate care work are new entrants to the intermediary marketplace and they are growing in number in response to rising demand for care services. This study examines, through the lens of labour process theory, the means of control utilized by digital platforms operating in Australia which organize and direct disability and aged care. The analysis of terms and conditions and website content reveals four means of control that influence the enactment of the labour process: Shifting risks and responsibilities from the platform to workers and clients; Apportioning the costs of doing business to workers; Dictating contractual arrangements; and Monitoring quality standards of service work. The findings advance knowledge of how power relations embedded in platform business models and the organization of work direct a precarious, freelance workforce. More broadly, the study demonstrates the explanatory power of labour process theory for understanding emergent forms of work and labour.