Miracle-dz/UniFAR-FTUs huggingface dataset:
Iranian Teachers’ Attitude towards Using Social Media and Technology to Increase Interaction amongst Students inside or outside the Classroom

Internet and Social media is a ubiquitous phenomenon affecting many areas of life, including education. From various disciplines have used some forms of social media in their personal as well as professional lives, the English Language Teaching (ELT) teachers are no exception. Many studies on the area have been conducted such as those reviewed by Inayati (2013), and Tess (2013). However, despite the fact that Iran is among the high users of a number of social media, such study in Iran is still scarcely found in International journals. Therefore, this paper addresses the issue by studying how Iranian ELT teachers perceive social media in relation to their teaching as well as their general attitudes towards this type of media. A number of ELT teachers in recent popular social media (telegram, whatsapp) were surveyed with regards to their attitude and perception of social media use in teaching English. Analysis of the survey results showed that generally, the participants indicated positive attitude towards the employment of social media in ELT. In addition, most participants also showed high awareness of the educative potentials offered by social media in ELT practices, and several factors which could potentially hinder the actual use of social media were also identified. Some implications were drawn based on the findings of the study, some of which are related to the aspect of education management.
ECONOMIC AND ENERGY VIABILITY OF SUNFLOWER IRRIGATED CROP

This work was carried out with the objective of assessing grain yield, economic analysis and energy balance of three sunflower genotypes with and without irrigation. The experiment was installed in the Experimental Farm of the Faculty of Agrarian Sciences of the Federal University of Grande Dourados in the 2011/2012 and 2012/2013 harvests in Dourados-MS. The experimental design utilized was a random complete block designed with subdivisions, with and without irrigation (plots), with three genotypes (subplots) and four replications, constituting 24 plots. There were no differences in productivity among the genotypes. The irrigation increased the operational cost of the sunflower crop production, but it did not economically obstruct the activity, due to the increase of productivity of 74,5% and 30% in the harvests of 2011/2012 and 2012/2013. The energy ratios of the sunflower crop were not altered by irrigation, equal to 5,7 and 8,7 in the harvests of 2011/2012 and 2012/2013, respectively.
Flying ad-hoc network application scenarios and mobility models

Flying ad-hoc networks are becoming a promising solution for different application scenarios involving unmanned aerial vehicles, like urban surveillance or search and rescue missions. However, such networks present various and very specific communication issues. As a consequence, there are several research studies focused on analyzing their performance via simulation. Correctly modeling mobility is crucial in this context and although many mobility models are already available to reproduce the behavior of mobile nodes in an ad-hoc network, most of these models cannot be used to reliably simulate the motion of unmanned aerial vehicles. In this article, we list the existing mobility models and provide guidance to understand whether they could be actually adopted depending on the specific flying ad-hoc network application scenarios, while discussing their advantages and disadvantages.
Effect of weather parameter on seasonal incidence of sorghum shoot fly, Atherigona soccata Rondani (Diptera: Muscidae)

Sorghum is an important cereal crop in India. Sorghum shoot fly, Atherigona soccata Rondani has been known to be the most serious pest causing grain yield losses. A field experiment was conducted during the cropping season of 201516 at MARS, Raichur to characterize relationship of various meteorological parameters with shoot fly, incidence in terms of egg load and dead heart. The oviposition by shoot fly reached peak (3.10 eggs/ plant) during 35 MSW and also it was almost equal (2.9 eggs/ plant) during 33 MSW. Similar trend was observed with respect to dead hearts, where it gradually increased and reached peaks (96.12 and 94.32%) during 33 and 35 MSW. In all the correlated weeks, maximum and minimum temperature had non-significant negative association with dead heart. The rainfall and rainy days had significant positive association on egg load on one week and three week lead time, respectively. The rainfall had significant positive association on dead heart during second and third week lead time.
The Factory and the Beehive. III. PTFEB132.707+19.810, A Low-mass Eclipsing Binary in Praesepe Observed by PTF and K2

Theoretical models of stars constitute the fundamental bedrock upon which much of astrophysics is built, but large swaths of model parameter space remain uncalibrated by observations. The best calibrators are eclipsing binaries in clusters, allowing measurement of masses, radii, luminosities, and temperatures for stars of known metallicity and age. We present the discovery and detailed characterization of PTFEB132.707+19.810, a P = 6.0 day eclipsing binary in the Praesepe cluster (τ ∼ 600–800 Myr; [Fe/H] = 0.14 ± 0.04). The system contains two late-type stars (SpTP = M3.5 ± 0.2; SpTS = M4.3 ± 0.7) with precise masses ( M⊙; M⊙) and radii ( R⊙; R⊙). Neither star meets the predictions of stellar evolutionary models. The primary has the expected radius but is cooler and less luminous, while the secondary has the expected luminosity but is cooler and substantially larger (by 20%). The system is not tidally locked or circularized. Exploiting a fortuitous 4:5 commensurability between Porb and , we demonstrate that fitting errors from the unknown spot configuration only change the inferred radii by ≲1%–2%. We also analyze subsets of data to test the robustness of radius measurements; the radius sum is more robust to systematic errors and preferable for model comparisons. We also test plausible changes in limb darkening and find corresponding uncertainties of ∼1%. Finally, we validate our pipeline using extant data for GU Boo, finding that our independent results match previous radii to within the mutual uncertainties (2%–3%). We therefore suggest that the substantial discrepancies are astrophysical; since they are larger than those for old field stars, they may be tied to the intermediate age of PTFEB132.707+19.810.
L-Probe Transmitarrays for X-Band Mobile Communications

Abstract—Two novel wire transmitarrays, which are designed using a pair of co-joined L-shaped probes, have been developed for X-band mobile communications. By adjusting the orientation of the L probes, the polarization of the transmitting wave can be easily made either vertical or horizontal. Floquet method has been used for characterizing the transmission responses, and both transmitarray unit cells are found to have achieved a phase range of greater than 380◦ and a linear phase sensitivity of 44.5◦/mm. Wide −1 dB gain bandwidth larger than 10% is achievable in both the vertically and horizontally polarized full-fledged transmitarrays, with radiation efficiency of ∼ 90%. The proposed transmitarrays have low radar cross section, which can be used for military applications.
How Award Winning Courseware is Impacting Engineering Education

In this paper, we report on a study regarding the impact of the Premier Award for Excellence in Engineering Education Courseware. This paper describes the first two phases of the research and findings with implications for engineering education. Research questions focus on, identifying the impact of the award on the courseware authors and developers, their teaching and their students’ learning; gathering information on the evolution of the award itself; and, describing the spread of pedagogical innovations across engineering and other related disciplines. The interviews and content analysis to date have initiated a rich description of the impact on the awardees' careers, especially with regard to their teaching practices and STEM education scholarship. It appears that the Premier Award holds some prestige and has been instrumental in shaping the careers of graduate students and young faculty members. Analysis of the awardees’ dossiers revealed the challenges associated with evaluating the impact of innovations on teaching and learning as well as issues surrounding the dissemination of innovations in engineering education.
Laser-ablation-powered mini-thruster

We have developed a new type of miniature jet for pointing microsatellites. It is based on laser ablation produced by a multi-mode diode laser. The target is a specially prepared tape with a transparent layer through which the laser light passes and an absorbing layer which produces the thrust. We have achieved specific impulse up to 1000 seconds (greater than possible with chemistry), together with laser momentum coupling coefficients of order 6 dyne/W. The preprototype should achieve 100 dynes of thrust. We will discuss the target interaction physics, the materials science involved in creating the targets, and some of our measurements with the preprototype thruster.
Performance Estimation of Organic Rankine Cycle by Using Soft Computing Technics

In this study, the thermal efficiency values of Organic Rankine cycle system were estimated depending on the condenser temperature and the evaporator temperatures values by adaptive network fuzzy interference system (ANFIS) and artificial neural networks system (ANN). Organic Rankine cycle (ORC) fluids of R365-mfc and SES32 were chosen to evaluate as the system fluid. The performance values of ANN and ANFIS models are compared with actual values. The R 2 values are determined between 0.97 and 0.99 for SES36 and R365-mfc, and this is satisfactory. Although it was observed that both ANN and ANFIS models obtained a good statistical prediction performance through coefficient of determination variance, the accuracies of ANN predictions were usually imperceptible better than those of ANFIS predictions.
Hidden Limit Orders and Liquidity in Order Driven Markets

This paper analyzes the rationale for the submission of hidden limit orders, and compares opaque and transparent limit order books. In my sequential model, the limit order trader may be informed with some probability. Both informed and large uninformed liquidity suppliers submit hidden orders in order to decrease the informational impact of their large orders, while ensuring a large trading volume. As they cannot adopt such a strategy in the transparent market, I find that pre-trade opacity improves market liquidity, and the welfare of the participants. My model further yields empirical predictions on the use and revelation of hidden orders in opaque markets.
Robust Tests in Semiparametric Partly Linear Models

Abstract. This paper focuses on the problem of testing the null hypothesis that the regression parameter equals a fixed value under a semiparametric partly linear regression model by using a three‐step robust estimate for the regression parameter and the regression function. Two families of tests statistics are considered and their asymptotic distributions are studied under the null hypothesis and under contiguous alternatives. A Monte Carlo study is performed to compare the finite sample behaviour of the proposed tests with the classical one.
Unpacking ‘culture’ in cultural studies of science education: cultural difference versus cultural production

In this article, we explore three anthropological approaches to science education research: funds of knowledge, third space/hybridity and practice theory. Definitions, historical origins, uses and constraints of each approach are included along with reviews of exemplary studies in each tradition. We show that funds of knowledge research draws on an earlier research tradition, cultural difference theory and rests on an assumption that groups build culture in response to fixed and static socio-political conditions. Practice theory is more flexible in that it allows researchers to study how groups create local meanings, which may conform to, resist or even transform those larger conditions through cultural production. We then illustrate the approaches by analysing the same case (that of a Mexican-American boy) using both cultural difference theory and practice theory, to illustrate the strengths and limitations of each approach.
Detection of Phytoplasma on Indian Fig ( Opuntia ficus-indica Mill) in Mexico Central Region

Problem statement: The Indian fig (a species of prickly pear cactus), has been known as Nopal, comprises an approximate area of 100,000 ha, in plantations used for human consumption. "Pyramids" Indian fig area located in the northeast ern State of Mexico has been an important Indian- fig area in the country, with 15810 ha, where a phy toplasma has been consistently present in symptomatic plant. Approach: An unknown symptomatology in the Indian fig (prickly pear cactus) (Opuntia ficus-indica Mill) was analyzed through grafting and a nested-PC R reaction and graft on healthy plants grown in a greenhouse. Results: The symptoms found, deforming, buds proliferation, thickening and heart-shaping in cladodes, with arre sted plant growth and deep yellowing of cladodes, were all attributed to the presence of a phytoplasm a given the amplification of a 1200 pb fragment of the 16S rRNA gene using primers R16 F2/R2 and R16F2n/R2 and 80% of phytoplasma transmission efficiency of successful grafts. Conclusion: Although the symptoms observed did not completely match those described for this organism in the regi on, a 1200 pb fragment was amplified and PCR products restriction analysis leading us to assume that the phytoplasma corresponds to subgroup 16Srll , previously reported for other crops in others world regions.
Physicochemical, Nutritional, Shelf Life and Sensory Properties of Iranian Sangak Bread Fortified with Grape Seed Powder

Grape seeds from grape pomace, a waste product generated during juice extraction, contain a high amount of fiber, valuable fatty acids, proteins, sugars, mineral, antioxidants and polyphenols. Grape Seed Powder (GSP) was explored for use in bread production due to its potential health benefits. Dough and breads were prepared using different levels of replacement of wheat flour with GSP (5, 10, 15 and 20%, on flour basis). Bread sensory properties during three days of storage were assessed. Unsaturated fatty acids and tocopherols were also measured before and after bread baking. Incorporating GSP in bread formulations significantly (p 0.05) changed after baking. With increasing GSP concentration, color values of L*and b* in bread decreased, while a* value increased. Results showed that increasing GSP in the flour blends resulted in decreased moisture content and water activity in the final product, leading to an extended shelf life.
CFD predictions of NREL Phase VI Rotor Experiments in NASA/AMES Wind tunnel

This article presents the computational predictions of NREL Phase VI rotor, a stall-regulated two bladed wind turbine with full-span pitch control and a power rating of 20 kW, in the NASA/AMES 80 ft. X 120 ft. wind tunnel. A 3D CFD–RANS approach is used, modeling single blade of the rotor utilizing periodicity, in a rotating frame of reference; over several upwind cases. All the simulations are performed using the commercial multi-purpose CFD solver ANSYS CFX 12.1. The blade is modeled with simplified spherical hub excluding nacelle and tower, at stationary wind conditions neglecting wall shear effects due to tunnel blockage. The comparisons are done for the blade with 0° yaw angle and 3° tip pitch angle. Reasonably good agreement is obtained when comparing modeled mechanical effects Viz. power, thrust, and span wise force components with measurements over wind speeds ranging from 5m/s to 25m/s. The capability of CFD in predicting complex 3D wind turbine aerodynamics is demonstrated in this paper with NREL Phase VI data campaign as a case study.
The effect on inequality of changing one or two incomes

We examine the effect on inequality of increasing one income, and show that for two wide classes of indices a benchmark income level or position exists, dividing upper from lower incomes, such that if a lower income is raised, inequality falls, and if an upper income is raised, inequality rises. We provide a condition on the inequality orderings implicit in two inequality indices under which the one has a lower benchmark than the other for all unequal income distributions. We go on to examine the effect on the same indices of simultaneously increasing one income and decreasing another higher up the distribution, deriving results which quantify the extent of the ‘bucket leak’ which can be tolerated without negating the beneficial inequality effect of the transfer. Our results have implications for the inequality and poverty impacts of different income growth patterns, and of redistributive programmes, leaky or not, which are briefly discussed.
A stable TTI reverse time migration and its implementation

Modeling and reverse time migration based on the tilted transverse isotropic (TTI) acoustic wave equation suffers from instability in media of general inhomogeniety, especially in areas where the tilt abruptly changes. We develop a stable TTI acoustic wave equation implementation based on the original elastic anisotropic wave equation. We, specifically, derive a vertical transversely isotropic wave system of equations that is equivalent to their elastic counterpart and introduce the self-adjoint differential operators in rotated coordinates to stabilize the TTI acoustic wave equations. Compared to the conventional formulations, the new system of equations does not add numerical complexity; a stable solution can be found by either a pseudospectral method or a high-order explicit finite difference scheme. We demonstrate by examples that our method provides stable and high-quality TTI reverse time migration images.
Effects of fining on phenolic compounds and colour of red wine obtained with addition of increased amounts of grape solid phase in pomace

The purpose of this work is to study the effect of grape pomace enrichment in solid phase (stems and seeds) on phenolic compounds and colour stability of obtained red wines, before and after use of different fining agents. Results have shown increase in total phenols and flavan-3-ols content after grape solid phase addition. On the other hand, decrease in anthocyanins content has generally been recorded in all wine samples except in wines obtained with addition of 40 g/l of seeds during maceration. Stems addition caused decrease in colour intensity while addition of seeds has increased this colour parameter. The use of four fining agents (albumin, gelatine, bentonite and PVPP) has been investigated and compared, especially in terms of their influence on potential stabilization effect of grape solid phase on wine colour. Fined wines tended to have considerably lower anthocyanin and flavan-3-ol levels, especially in the case of gelatine and PVPP treatment (decrease up to 60 and 70%, respectively). In the case of chromatic parameters, used fining agents caused colour intensity decrease but it is important to emphasize that their values, after fining, are still as high as expected from red wine. This can be explained by the stabilization effect of increased flavan-3-ols content.
Une étude de la réponse des cellules B mémoires au vaccin polysaccharidique conjugué contre le méningocoque du sérogroupe C

"Neisseraia meningitidis" est une cause importante de maladies invasives chez les enfants. En Angleterre, le vaccin polysaccharidique conjugue contre le serogroupe C fait partie du plan de vaccination de routine. Chez les enfants de moins d'une annee, 3 doses de vaccin induisent une montee importante des anticorps bactericides, mais qui ne persistent pas au-dela d'une annee. Les cellules B memoires, semblent essentielles pour proteger les jeunes enfants primo-immunises comme nourrissons. Dans cette etude, j'ai evalue la persistance dans le sang des plasmocytes producteurs d'anticorps et des cellules memoires specifiques chez des enfants de 12 mois primo-immunises a 2,3, et 4 mois. Les resultats montrent que ces cellules, generalement non detectables, reapparaissent a jour 6 (plasmocytes) ou 8 (cellules B memoire) apres une dose de rappel de vaccin conjugue. Ces donnees permettent de mieux comprendre la participation de l'immunite memoire a la protection contre les infections invasives a "N. meningitidis".
Employment Inequality, Employment Regulation, and Social Welfare

This paper develops a model which explains the unequal employment outcomes of two groups - defined as their, respective, likelihoods of successfully filling job vacancies - in terms of disparities in their access to job networks. This disparity arises because a proportion of vacancies are filled using informal methods so that, as a first step, information about vacancies only becomes available through word-of-mouth; as a second step, appointments are based on the recommendations of existing employees. If society is fragmented, then members of one group will have little or no contact with members of the other group. Therefore, the power to inform and to recommend becomes excessively concentrated in the group that dominates the workforce. In such a situation, the role of fair-employment regulation is to ensure fair access to jobs for all. While this generates equity gains, it could, by raising the costs of hiring and firing, also be accompanied by efficiency losses. Whether social welfare increases or decreases as a result of regulation depends on the relative magnitudes of these gains and losses.
(Ciri MRI Kefungsian dalam Korteks Visual (BA 17, 18 dan 19) yang Berpadanan dengan Medan Penglihatan bagi Subjek Normal, Disyaki Glaukoma (GS) dan Glaukoma Sudut Terbuka Primer (POAG)

The purpose of this study was to characterize, differentiate and correlate visual field and brain activation in visual cortex for normal, glaucoma suspect (GS) and primary open angle glaucoma (POAG) participants using Standard Automated Perimetry (SAP) and functional Magnetic Resonance Imaging (fMRI) respectively. The fMRI scans and SAP test were both carried out in Pusat Perubatan Universiti Kebangsaan Malaysia (PPUKM). Two types of black-and-white checkerboard pattern were displayed to the participants during the fMRI scans. The fMRI data were analyzed using WFU pickatlas toolbox targeting visual cortex area. The results showed that there was no significant difference in number of activated voxel between the three groups in visual cortex (BA 17, 18 and 19) while viewing all the given stimuli (p > 0.05). The pattern standard deviation (PSD) of SAP for visual field also revealed no significant differences (p > 0.05) in all groups of participants. However, negative correlation between PSD and fMRI activation was observed. The PSD values increased with a decrease in fMRI activation. With reference to visual field analysis, the results suggest that glaucomatous neuropathy of POAG patients has led to a gradual decrease in visual cortex activation and a gradual increase in PSD.