Miracle-dz/UniFAR-FTUs huggingface dataset:
PsyHub Students ’ and teachers ’ emotions . A study with children ’ s drawings

The study describes the emotions of students and teachers in positive and negative interpersonal situations, as they are depicted in the drawings of 245 children from 2nd to 5th grade of primary school (7 to 11 years of age). The Scale of Emotions from PAIR was used to categorize the emotions of pupil and teacher in two situations (positive and negative) and to derive the correspondent Emotional climates. Chisquared was employed for various comparisons. (1) The distribution of Emotions categories showed, as expected, a prevalence of positive, shared emotions in the positive situation and a prevalence of negative, often contrasting emotions in the negative situation. (2) Gender difference emerged only in the positive situation, in which girls represented themselves as happy more frequently than boys: (3) Grade difference emerged only in the negative situations, in which children of the 5th grade represented their teacher with a neutral face more often than children of the 2nd grade, who tended to represent her as happy or sad. These results are interpreted in the light of boys and girls school adaptation and their increasing ability to understand and represent problematic interpersonal situations in school.
Reconstrução Tridimensional de Ambientes usando LIDAR e Câmara Tridimensional Reconstruction of Scenes with LiDAR and Camera

Tridimensional reconstruction is still a challenging area, that has multiple application in architecture and robotics. Several technologies are used today, like Stereoscopy or Structured Light, however, none is able to achieve precise geometric results, which are usually required. A technology, LiDAR, has evolved as the de facto technology for tridimensional reconstruction, being able to achieve unmatched results. Yet, this technology is unable to register the color of objects, so the usual solution is to use a camera for this. Therefore, in this work, a set of algorithms and techniques for tridimensional reconstruction with a LiDAR laser scanner and a camera was developed. Moreover, a 3D scanner was developed to register real-word scenes. In particular, an innovative calibration method was developed to calibrate the laser scanner, which performed above a similar calibration method. Finally, the reconstruction process was tested with real data. The geometric reconstruction was very accurate but the color reconstruction was not, especially because of the poor calibration of the camera.
Modified Impedance-Based OOS Protection Based on On-Line Thévenin Equivalent Estimation

In this paper, a novel approach based on the Thévenin tracing is presented to modified conventional impedance-based out-of-step (OOS) protection. In conventional approach, the OOS detection is done by measuring positive sequence impedance. However, the measured impedance may be change due to different factors such as capacitor bank switching and reactive power compensators that it can cause the relay to malfunction. In this paper, first, an on-line Thévenin equivalent (TE) approach based on the recursive least square (RLS) is presented. Then, a protection function is developed based on online network Thévenin equivalent parameters to correct the measured impedance path. The main feature of this method is the use of local voltage and current measurements for Thévenin equivalent estimation and OOS protection. The performance of the proposed method is investigated by simulation of synchronous generator OOS protection function in the presence of a static synchronous compensator (STATCOM). The simulation results show that, STATCOM changes the impedance path and can cause the incorrect diagnosis of OOS relay. Furthermore, the proposed method corrects the impedance path and improves the accuracy of OOS impedance-based function when the STATCOM is installed in system.
Quantum confinement effects for light emis- sion in perovskites

Research in halide perovskites has been dominated over the last few years by solar cells, now also includes a growing focus on this materials light emitting properties. Halide perovskites are an appealing group of materials due to their high performance, simple synthesis route, and low price. Recent advances in colloidal perovskite quantum dot synthesis allow to easily tune optical and electronic properties based on quantum size effects. In this work, a new method utilizing porous oxide materials is investigated for lead based hybrid organic-inorganic perovskite quantum dot preparation. Optical properties of perovskites confined in porous oxide matrices are studied and correlated with their detailed structural analysis. The behavior of charge carriers in this new material is investigated via low temperature spectroscopy. Light Emitting Diodes (LEDs) based on the material are prepared. Additionally, a non-lead based perovskite material is investigated as a potential non-toxic alternative quantum confined material. This new approach to perovskite quantum dot synthesis opens up further compelling avenues for research on the fundamental properties of quantum confined particles as well as development of new optoelectronic devices. June 2018 Stepan Demchyshyn
The influence of feed form on broiler production and gastrointestinal tract development. Online J. Anim. Feed Res., 9(1): 38-43. www.ojafr.ir;

A completely randomized design experiment was conducted to assess the influence of feed form on broiler production and gastrointestinal tract development. A total of (n=315) 16 days-old Ross 308 chicks were randomly assigned to three dietary treatments (mash, crumbles and pellets) with three replicates. Weekly data indicated that birds on pellet and crumble diets had a significant (P<0.05) improvement on a number of production parameters than birds fed diet in a mash form. Data for average values for the whole experimental period demonstrated that the dietary treatments had significant effect on feed intake (0.001), body weight (P=0.013), performance index (P=0.040), abdominal fat weight (P=0.010) and carcass weight. (P=0.001). However, feed conversion ratio and carcass yield did not show significant (P>0.05) response to dietary treatments. Contrary to weekly data the averages for the whole experimental period data was dominated by birds on crumble diet with the highest feed intake, body weight, abdominal fat weight and carcass weight. Gastrointestinal tract development results indicated that dietary treatment had a significant effect on intestinal length (P=0.015) whereby birds that consumed diet in a mash form had superior intestinal length. The intestinal and gizzard weight parameters were not significantly (P>0.05) influenced by the dietary treatment. The results of the current study proved that the crumble form of a diet is the most suitable for optimum broiler production during growing and finishing stages while diet in a mash form is suitable for optimum development of gastrointestinal tract. O R IG IN A L A R T IC L E P I: S 2 2 2 8 7 7 0 1 1 9 0 0 0 0 6 -9 R e c e iv e d : D e c 2 0 , 2 0 1 8 R e is e d : Ja n 2 5 , 2 0 1 9
Determining the Effects of Manganese Source and Level in Diets Containing High Levels of Copper on Growth Performance of Growing-Finishing Pigs

Summary A total of 1,994 pigs (PIC; 337 × 1050; initially 88.2 lb) were used to determine the effect of manganese (Mn) source and level on finishing pig growth performance. This experiment was a follow-up to an Mn source by level study conducted last year. However, unlike last year’s study, in the present study all diets contained 150 ppm added Cu from Cu hydroxychloride (IBC; Micronutrients, Indianapolis, IN). Dietary treatments were arranged in a 2 × 3 factorial with main effects of Mn source (Mn hydroxychloride, IntelliBond M, Micronutrients, Indianapolis, IN; or Mn sulfate, MnSO 4 , Eurochem, Veracruz, Mexico), and increasing added Mn concentration (8, 16, and 32 ppm). The trace mineral premix was formulated without added Mn. There were 27 pigs per pen and 12 pens per treatment. Diets were corn-soybean meal-distillers dried grains with solubles-based and were fed in 4 phases. Overall, there was no ( P > 0.10) Mn source × level interaction observed for average daily gain (ADG), average daily feed intake (ADFI), and feed efficiency (F/G). Pigs fed IBM had increased ( P < 0.05) final body weight (BW), ADG, and ADFI compared to pigs fed MnSO 4 . Pigs fed 16 ppm of Mn tended ( P = 0.088) to have reduced ADFI when compared to pigs fed 8 and 32 ppm of Mn. In conclusion, there appears to be little benefit in growth performance by feeding more than 8
Students’ perception and performance across ability levels on GeoGebra software usage in learning of circle geometry

This study investigated Students’ Perception and Performance across ability levels on GeoGebra Software usage in Learning of Circle Geometry. The study was guided by two research questions and two null hypotheses which were tested at . 05 alpha level. Descriptive and quasi-experimental research design was used. A sample of 64 senior secondary two students was selected from a population of 25,913 from the 33 public schools in Yenagoa Local Government Area of Bayelsa State. The purposive sampling technique was employed to select the sample. The instrument used for the collection of data was Geometry Performance Test (GPT) and Students Perception on GeoGebra Software (SPGS). A reliability index of 0.82 and 0.63 was established for GPT and SPGS using the test-retest Cronbach methods respectively. The mean, standard deviation, t-test and analysis of covariance were used to analyse the data. The result showed that students had a positive perception on the use of GeoGebra software for the teaching and learning of circle geometry and there was no significant difference between the perception of the male and female students on the use of GeoGebra software for the teaching and learning of circle geometry. The result also revealed that students of all ability levels benefitted from the use of GeoGebra software in the teaching and learning of circle geometry. It was concluded that the use of GeoGebra software to teach circle geometry improved students’ performance of all ability levels and students have a positive perception of the use of GeoGebra software
Electrical control of the electron spin dynamics in [111]-oriented GaAs/AGaAs quantum wells

Nous avons etudie la dynamique de relaxation de spin des electrons dans des puits quantiques GaAs/AlGaAs elabores sur substrat d'orientation par spectroscopie de photoluminescence resolue en temps. En appliquant un champ electrique externe d'environ 50 kV/cm le long de l'axe de croissance, nous avons observe une augmentation spectaculaire du temps de relaxation de spin de l'electron qui peut atteindre des valeurs plus grandes que 30 ns. Ceci est le resultat du controle electrique du decalage en energie "spin-orbite" de la bande de conduction qui peut s'annuler lorsque le terme de Rashba compense exactement celui de Dresselhaus. Ceci entraine une suppression du mecanisme de relaxation de spin de type D'Yakonov-Perel, mecanisme dominant dans les puits quantiques non dopes a des temperatures superieures a 50 K. Les mesures effectuees sous champ magnetique externe transverse (configuration Voigt) montrent que les temps de relaxation de spin pour les trois directions de l'espace peuvent etre controles simultanement par le champ electrique. Ce controle "total" de la relaxation de spin ne peut se produire que pour des puits quantiques elabores sur une orientation . Nous avons finalement developpe un modele permettant d'interpreter les mesures experimentales de la dependance en champ electrique de l'anisotropie de la relaxation de spin dans ces puits quantiques .
Livestock feeds and feeding system in Enset (Ensete ventricosum) dominated mixed farming system of southern Ethiopia. Online J. Anim. Feed Res., 4(6): 150-158

Fasciolosis can cause considerable change in hematological parameters and liver driven serum enzymes. Hence, the aim of this research is to assess the hematological and biochemical changes in sheep infected with Fasciolosis in comparison with healthy controls. A total of 52 local breed (26 form naturally infected and 26 from healthy control group) matched with sex and age were enrolled in the study. Five ml blood using EDTA vacutainer tube for hematology and another 5 ml blood by serum separating tubes for serum biochemical profiles were taken and analyzed using Sysmex automated hematological analyzer and Vegasys chemistry analyzer respectively. The hematological analysis indicated there were significant mean reductions (P<0.001) in tRBC, hemoglobin, hematocrit, Mean Corpuscular Volume (MCV), Mean Corpuscular Hemoglobin (MCH); Mean corpuscular hemoglobin concentration (MCHC) in case group (5.62±1.15, 8.92±1.66, 20.12±5.78, 26.05±4.16, 9.444±2.00 and 29.72±2.55) than control group (10.27±1.36, 12.68±1.66, 38.9±6.05, 40.50±3.35, 13.100±1.35 and 34.327±3.06) respectively. On the contrary the mean value of tWBC and eosinophil were significantly higher in the infected group (11.27±2.7 and 7.19±2.81) than the flock free of Fasciolosis (7.12±2.61 and 2.82±1.07) respectively. Regarding biochemical parameters, the significant mean elevation (P 0.001) in serum ALT (125.92±20.71) and AST (34.73±11.97) in the infected sheep were observed than ALT (77.04±13.96) and AST (23.69±7.37) of the control groups. Whereas, the serum total protein and glucose level (5.17±1.05 and 21.15±11.08) in Fasciola infected sheep were significantly lower (P<0.001) than healthy control (7.33±1.06 and 32.62±9.48, respectively). The alteration in hemato-biochemical profile suggested a great impact of Fasciolosis on liver physiology leading to loss of production and productivity in sheep industry.
Small Covers for Near-Zero Sets of Polynomials and Learning Latent Variable Models

Let <tex>$V$</tex> be any vector space of multivariate degree-<tex>$d$</tex> homogeneous polynomials with co-dimension at most <tex>$k$</tex>, and <tex>$S$</tex> be the set of points where all polynomials in <tex>$V$</tex> nearly vanish. We establish a qualitatively optimal upper bound on the size of <tex>$\epsilon$</tex>-covers for <tex>$S$</tex>, in the <tex>$\ell_{2}$</tex>-norm. Roughly speaking, we show that there exists an <tex>$\epsilon$</tex>-cover for <tex>$S$</tex> of cardinality <tex>$M=(k/\epsilon)^{O_{d}(k^{1/d})}$</tex>. Our result is constructive yielding an algorithm to compute such an <tex>$\epsilon$</tex>-cover that runs in time <tex>$\text{poly}(M)$</tex>. Building on our structural result, we obtain significantly improved learning algorithms for several fundamental high-dimensional probabilistic models with hidden variables. These include density and parameter estimation for <tex>$k$</tex>-mixtures of spherical Gaussians (with known common covariance), PAC learning one-hidden-layer ReLU networks with <tex>$k$</tex> hidden units (under the Gaussian distribution), density and parameter estimation for <tex>$k$</tex>-mixtures of linear regressions (with Gaussian covariates), and parameter estimation for <tex>$k$</tex>-mixtures of hyperplanes. Our algorithms run in time quasi-polynomial in the parameter <tex>$k$</tex>. Previous algorithms for these problems had running times exponential in <tex>$k^{\Omega(1)}$</tex>. At a high-level our algorithms for all these learning problems work as follows: By computing the low-degree moments of the hidden parameters, we are able to find a vector space of polynomials that nearly vanish on the unknown parameters. Our structural result allows us to compute a quasi-polynomial sized cover for the set of hidden parameters, which we exploit in our learning algorithms.
Gene Expression Programming for Prediction of Flow Discharge in Compound Channels. J. Civil Eng. Urban. 2(4): 164-169

There are many studies on the hydraulic calculation of steady uniform flows in compound open channels. Based on these studies, various methods have been developed with different assumptions. In general, these methods either have long computations or need numerical solution of differential equations. Furthermore, their accuracy for all compound channels with different geometric and hydraulic conditions may not be guaranteed. In this paper, to overcome with these limitations, a new simple and dimensionless equation has been proposed based on gene-expression programming (GEP), which is an extension to genetic programming (GP). In this equation only three parameters (e.g. depth ratio, coherence and ratio of computed total flow discharge to bankful discharge) have been used to simplify its applications for hydraulic and river engineers. By compiling 394 stage-discharge data from laboratories and fields of 30 compound channels, this new equation has been applied to estimate the flow conveyance capacity. The proposed GEP approach gives satisfactory results (R2 = 0.98 and RMSE = 0.32) compared to traditional method (VDCM) with R2 = 0.69 and RMSE = 1.72 for flow discharge computations.
Gross Morphological Studies on Portal Vein in Adult Indian Sheep (Ovis aries)

Portal vein is the main afferent vessel that drains the nutrient loaded venous blood which contributes to 2/3 of total hepatic blood flow. Portal venous blood has considerably more oxygen than the systemic venous blood and contributes 60% of the oxygen requirement of the liver (Cullen et al., 2016). 3/4 th of the blood supply to liver is provided by portal vein. It is also to be understood that the periphery of the polyhedral lobule is not evenly supplied by portal venules and hepatic arterioles, although the hepatic sinusoids around the portal tracts are the sites where oxygen and nutrient rich blood flows first. Hepatic microcirculation is well regulated by sphincters in the finest branches of the portal venules and inlet venules.
Influence of foliar application of pulse magic, PGRs & nutrients on growth parameters and yield of Pigeon Pea

Pigeon pea is most important pulse crop in Kalburgi district of Karnataka. Yield of pigeon pea is decreasing due to flower drop and pod setting in climatic vulnerability situation. Field experiment was conducted to study source and sink relationship in pigeon pea (Cajanus cajan l.) as influenced by nutrients and plant growth regulators. The results in this investigation noticed that among all the treatments pulse magic spray on pigeon pea variety TS3R have significantly increased the yield (1442 kgha-1) compared to the control (1182 kgha-1) which increased the yield by 22% over control by improving the growth parameters such as plant height (166.20 cm), leaf area (47.63 dm2 plant-1), leaf area index (1.80), leaf area duration (84.71 days), absolute growth rate (0.94 g day -1), crop growth rate (3.94 g dm-2 day -1), total dry matter accumulation (195.36 g plant-1) as compared to control (151.20 cm, 36.01 dm2 plant-1, 1.24, 66.46 days, 0.69 g day -1, 2.17 g dm-2 day -1 and 164.84 g plant-1 respectively). Pulse magic is a combi product, released by university of agricultural sciences, Raichur as it contains major nutrients, micro nutrients and PGR which helped the crop to achieve maximum yield potential.
Lead: Chemistry, Analytical Aspects, Environmental Impact and Health Effects

Chapter 1. An overview of the historical importance, occurrence, isolation, properties and applications of lead (J.S. Casas, J. Sordo). Chapter 2. Lead(II) coordination chemistry (J.S. Casas et al.). Chapter 3. Organolead chemistry (Ionel Haiduc et al.). Chapter 4. Environmental occurrence, health effects and management of lead poisoning (S.J.S. Flora et al.). Chapter 5. Analytical procedures for the lead determination in biological and environmental samples (P. Bermejo, J.A. Cocho).
Moment determinacy of powers, products and other transforms of nonnegative random variables

We study the moment determinacy of nonlinear (Box-Cox) transformations of random variables. We establish new criteria for moment (in)determinacy and apply them to powers and products of nonnegative random variables. In particular, we show that the power and the product (of the same ‘order’) of generalized gamma random variables, both share the same moment determinacy property. Similar statement holds also for half-logistic random variables. The moment (in)determinacy of other transforms of random variables are also studied. We prove new results answering new questions in this area. In a few cases we either extend previously known results or provide new proofs to existing results. Related topics are briefly discussed. 2010 Mathematics Subject Classification: 60E05, 44A60, 33B15, 62G30
Quasi-particle Interference in Sr2RhO4

The spectroscopic techniques of ARPES and spectroscopic STM play a key role in strongly correlated electron research due to their ability to resolve k-space. However, due to their different approaches in obtaining k-space information, the two techniques do not necessarily agree on the observed bandstructure. Here, in an attempt to clear the fog between the two, we present FT-STM results on the rhodate Sr2RhO4 focusing on the comparison between our data and previous ARPES studies on the same sample. We deduce the low-energy bandstructure through the modulations of the LDOS caused by impurity scattering. The Fermi surface area and self-energy are then calculated. We find a flattened dispersion compared to the ARPES result which is shown to be in line with previous FT-STM studies on other correlated electron materials.
Mecanisme d'intercalation-pontage et proprietes adsorptives vis-a-vis de cd#2#+ et cu#2#+ de saponites a piliers aluminiques

La synthese d'argiles pontees a ete realisee a partir d'une saponite naturelle, de plusieurs saponites de synthese et d'une solution de al#1#3o#4(oh)#2#4#+#x(h#2o)#1#2#-#x#(#7#-#x#)#+. La densite des piliers est fortement liee a la charge des feuillets lorsque celle-ci est faible. En revanche, lorsque la charge depasse 1,1 par maille, la quantite d'aluminium inseree n'excede pas un pilier par 5,9 mailles. Cette densite est dictee par le rayon de giration du polycation aluminique en solution. L'etude par diffraction des rx et les mesures des surfaces specifiques des differents echantillons, ont montre que l'organisation des saponites a piliers est proportionnelle a la quantite d'aluminium inseree. Lors de la calcination, des protons se liberent des piliers et attaquent la couche tetraedrique des feuillets de la saponite, certains tetraedres s'inversent pour former des liaisons al#p#i#l#i#e#r-o-al#f#e#u#i#l#l#e#t et certains atomes d'aluminium octaedriques des piliers voient leur coordinence diminuer a 5 par perte d'un ligand h#2o. Ces atomes d'aluminium retrouvent leur coordinence octaedrique a humidite ambiante. La structure du polycation al#1#3 est essentiellement conservee. Pour que le pontage soit reussi (distance basale de 18 a et surface specifique superieure a 250 m#2/g), il est imperatif que la calcination se realise sur un echantillon intercale fraichement prepare. En effet, avant calcination, le polycation al#1#3 evolue dans le temps pour donner des especes plus condensees, qui ne resistent pas a la chaleur. Du point de vue des proprietes adsorptives, la saponite pontee en suspension dans l'eau se comporte comme un oxyhydroxyde. Elle perd toute capacite d'echange cationique provenant de la charge permanente des feuillets. Les piliers entre les feuillets peuvent etre consideres comme des paquets de sites d'adsorption, a savoir des groupements de surfaces capables de chimisorber les cations metalliques tels que cd#2#+ et cu#2#+. Ces cations metalliques voient leur sphere de coordination se modifier lors de l'adsorption suite a une substitution h#2o/oh de surface comme il est demontre par les isothermes d'adsorption et par des techniques spectroscopiques. La perte de mobilite resultant de cet ancrage fait de ces matrices de bon candidats pour la fixation des polluants