Miracle-dz/UniFAR-FTUs huggingface dataset:
Representations of finite groups and Cuntz-Krieger algebras

We investigate the structure of the C*-algebras 𝒪ρ constructed by Doplicher and Roberts from the intertwining operators between the tensor powers of a representation ρ of a compact group. We show that each Doplicher-Roberts algebra is isomorphic to a corner in the Cuntz-Krieger algebra 𝒪A of a {0,1}-matrix A = Aρ associated to ρ. When the group is finite, we can then use Cuntz's calculation of the K-theory of 𝒪A to compute K*(𝒪ρ).
Clinical Important Hemodynamic Characteristics For Serial Stenosed Coronary Artery

Effects of serial stenosis on coronary hemodynamics are investigated in the human right coronary artery (RCA) by blood flow analysis. The 3D reconstruction of the geometry of the stenosed coronary artery uses the multislice computerized tomography serial images method. Results of the numerical analysis present the hemodynamic characteristics of the serial stenosed coronary artery throughout the flow separation, pressure drop and wall shear stress. The pressure loss associated with recirculation region created in the vicinity of each constriction was found to be large. In two stenoses the corresponding pressure gradients are around 30 mmHg and correspond to the stenosis with fractional flow reserve—FFR < 0.7 (value associated to the severe stenosis). Distal to the stenosis, flow is associated with fluctuations in the wall shear stress and vorticity. Both FFR and CFD analysis help identify intermediate lesions that require intervention and reduce unnecessary procedures with potential complications.
Development of Magnetic Nanoparticles from Poplar Sawdust for Removal of Pesticides from Aqueous Solution

A magnetic nano-adsorbent from widely available agricultural waste by-product viz. poplar sawdust (MNPSD) was successfully prepared by applying chemical co-precipitation method and was subsequently characterized for its unique properties of high surface area and nano-size particles. Adsorption studies were conducted in laboratory batch mode to evaluate its capacity to remove methoxychlor and methylparathion. Methoxychlor and methylparathion are organic based pollutants that are detected in the wastewaters due to their excessive usage in agriculture. The maximum adsorption efficiency of MNPSD for methoxychlor and atrazine were determined to be 163.9 mg/g and 77.5 mg/g respectively at contact time of 55min and pH of 2. Equilibrium, kinetic and thermodynamic studies further revealed the suitability of MNPSD for use as a cost effective, environmental friendly adsorbent for wastewater treatment especially for removal of hazardous pesticides. KeywordsPesticides; Sawdust; Magnetic Nanoparticle; Adsorption Isotherm; Adsorption Kinetics.
Astrophysical motivation for directed searches for a stochastic gravitational wave background

The nearby Universe is expected to create an anisotropic stochastic gravitational-wave background (SGWB). Different algorithms have been developed and implemented to search for isotropic and anisotropic SGWBs. The aim of this paper is to quantify the advantage of an optimal anisotropic search, specifically comparing a point source with an isotropic background. Clusters of galaxies appear as point sources to a network of ground-based laser-interferometric detectors. The optimal search strategy for these sources is a ``directed radiometer search. '' We show that the flux of SGWBs created by the millisecond pulsars in the Virgo cluster produces a significantly stronger signal than the nearly isotropic background of unresolved sources of the same kind. We compute their strain power spectra for different cosmologies and the distribution of populations over redshifts. We conclude that a localized source, like the Virgo cluster, can be resolved from the isotropic background with very high significance using the directed-search algorithm. For backgrounds dominated by nearby sources, up to a redshift of about 3, we show that the directed search for a localized source can have a signal-to-noise ratio that is greater than that for the all-sky integrated isotropic search.
The Impact of Post Activation Potentiation on Achilles Tendon Stiffness, Elasticity and Thickness among Basketball Players

The purpose of this study is to examine and further understand the effects of post activation potentiation on Achilles tendon (AT) thickness, elasticity and stiffness among basketball players. Basketball is one of the world’s most popular and widely viewed sports. One of the main factors which athletes depend on during their performance is elastic energy coming straight from the AT. Contractile activity increases the muscular force and is known in science as post activation potentiation (PAP). Twelve basketball players (aged 21.3 ± 2.1 years) from the first Polish league took part in this study. The PAP session consisted of single repetitions of the squat with loads corresponding to 60%, 70%, 80%, 90% and 100% of 1 repetition maximum (RM). The measurement method for AT thickness was ultrasonography and for the elasticity and stiffness was myotonometry. The measurements were taken before and immediately after PAP training session. Obtained results: AT stiffness increased significantly from the baseline post exercise, while AT thickness and elasticity decreased after the physical effort. The exercise in PAP caused significant changes in stiffness, elasticity and thickness of the AT.
Effects of Graded Levels of Poultry Fat on Performance and Carcass Traits in Broilers

This experiment was conducted to evaluate the effects of graded levels of poultry fat on performance and carcass traits of broilers. In this experiment In this experiment 144 day old broiler chicks (Ross308 strain) were used in a completely randomized design for 42 days with 4 treatments in 3 replicates and 12 chicks in each replicate. The experimental groups included: T1( control group, T2) diet with 2% of poultry fat, T3 (diet with 4% of poultry fat and T4) diet with 6% of poultry fat. According to the results, inclusion different levels of poultry fat in broiler rations significantly improved there performance and carcass traits (P>0.05). The highest amount of daily weight gain was observed in group 4, where as the highest carcass per cent belonged to group 3. It was concluded that inclusion of poultry fat until 6% in diets of broilers can beneficially affect the performance and carcass traits.
Effects of Elevated Free-Stream Turbulence on Flow and Thermal Structures in Transitional Boundary Layers

The effects of elevated free-stream turbulence on flow and thermal structures in transitional boundary layers were investigated experimentally on a heated flat plate. Detailed boundary layer measurements using a three-wire probe and wall heat transfer were made with free-stream turbulence intensities of 0.5, 3.8, 5.5 and 6.4 percent respectively. The onset of transition, transition length and the turbulent spot formation rate were determined. The statistical results of the streamwise and cross-stream velocity fluctuations, temperature fluctuation, Reynolds stresses and Reynolds heat fluxes were presented. The eddy viscosity, turbulent thermal diffusivity and the turbulent Prandtl number were calculated and related physical mechanisms are discussed.Copyright © 1993 by ASME
Evaluation of the Haney Soil Health Tool for corn nitrogen recommendations across eight Midwest states

Use and development of soil biological tests for estimating soil nitrogen (N) availability and subsequently corn (Zea mays L.) fertilizer N recommendations is garnering considerable interest. The objective of this research was to evaluate relationships between the Haney Soil Health Test (HSHT), also known as the Soil Health Tool or Haney test, and the economically optimum N rate (EONR) for corn grain yield at 17 sites in eight Midwest US states in 2016. Trials were conducted with a standard set of protocols that included a nonfertilized control plus six N rates applied at planting or as a split between planting and sidedress, soil samples for the HSHT prior to planting, and grain harvest at physiological maturity, and determination of EONR for each N application timing. Results indicated that HSHT recommendations with expected yield accounted for ≤28% of the variation in EONR among sites and N timings. Two components of the HSHT not directly used in the HSHT N recommendation for corn, the soil health calculation, or soil health score, and the Solvita carbon dioxide (CO2)-Burst lab test, accounted for the most variation in EONR. These two components were moderately related (R2 = 0.29 to 0.39) to soil organic matter (OM), highly related (R2 = 0.98) with each other, and subsequently both accounted for over one-half (R2 = 0.55) of the variation in EONR for N applied at planting or as a split. With additional research, these two components may help improve N recommendations for corn in the Midwest, especially Solvita CO2-Burst because it costs less to determine than the soil health calculation.
PHYTOCHEMICAL SCREENING, EVALUATION OF IN-VITRO ANTIOXIDANT ACTIVITIES AND ACUTE TOXICITY EFFECT OF ORGANIC EXTRACTS OF DORSTENIA MANNII (MORACEAE).

Background: Many oxidative stress related diseases are as a result of accumulation of free radicals in the body. A lot of researches are going on worldwide directed towards finding natural antioxidants of plants origins. The aims of this study were to screen for phytochemical constituents, evaluate their in vitro antioxidant activities and acute toxicity effect of the crude organic extracts of D. mannii . Methods: The phytochemical screening was done using the method of Trease and Evans. 1989, The flavonoid, proanthocyanidin, tannins and phenolic contents of the extracts were also determined using standard phytochemical reaction methods. Antioxidant potential of crude organic extract of D. mannii was assessed using tests involving inhibition of, DPPH, NO and metal chelating. The acute toxicity study was performed according to the OECD, 2004 protocol. Results: Phytochemical screening revealed the presence of alkaloids, saponines, tannins, and flavonoids in all plant extracts. Glycosides and phlobatannins were also present in all plant extracts except, ethanolic Leaves (EL). Twig extracts had the highest polyphenol content (ET= 815.51 ± 0.57 mg EqCat vs HT= 727.27± 0.36 mg EqCat; P 5000 mg/kg BW. The animals exhibited no changes in general behaviour or physiopatological activities. Although there was a change in the weights of rats in the treated groups, this was significantly reduced in the HT group and statistically not significant in the ET group though higher compare to the control (P< 0.05). Results of blood parameters indicated a significant decrease in AST and ALT levels between the negative control and the treated groups (P< 0.05), with HT lowering AST more than ET. Conclusions: Our findings provide evidence that the crude extract of D. mannii is a potential source of natural antioxidants, and this justified its uses in folkloric medicines.
X-Ray Flaring on the dMe Star, Ross 154

We present results from two Chandra imaging observations of Ross 154, a nearby flaring M dwarf star. During a 61 ks ACIS-S exposure, a very large flare occurred (the equivalent of a solar X3400 event, with LX = 1.8 × 1030 ergs s−1) in which the count rate increased by a factor of over 100. The early phase of the flare shows evidence for the Neupert effect, followed by a further rise and then a two-component exponential decay. A large flare was also observed at the end of a later 48 ks HRC-I observation. Emission from the nonflaring phases of both observations was analyzed for evidence of low-level flaring. From these temporal studies we find that microflaring probably accounts for most of the “quiescent” emission and that, unlike for the Sun and the handful of other stars that have been studied, the distribution of flare intensities does not appear to follow a power law with a single index. Analysis of the ACIS spectra, which was complicated by exclusion of the heavily piled-up source core, suggests that the quiescent Ne/O abundance ratio is enhanced by a factor of ~2.5 compared to the commonly adopted solar abundance ratio and that the Ne/O ratio and overall coronal metallicity during the flare appear to be enhanced relative to quiescent abundances. Based on the temperatures and emission measures derived from the spectral fits, we estimate the length scales and plasma densities in the flaring volume and also track the evolution of the flare in color-intensity space. Lastly, we searched for a stellar wind charge exchange X-ray halo around the star but without success; because of the relationship between mass-loss rate and the halo surface brightness, not even an upper limit on the stellar mass-loss rate can be determined.
Modeling Hypertrophic Cardiomyopathy in Neonatal Cardiomyocytes in Cultured in 3D

Heart disease continues to be the leading cause of death in both men and women. It is accompanied with cellularand organlevel remodeling that cannot be mimicked or recaptured by cells on standard culture platforms. Polyethylene glycol hydrogels bridge this gap by providing user-defined tunability for cell culture. A novel 3D cell culture system was developed to encapsulate neonatal rat ventricular cardiomyocytes (NRVMs) in a single plane, and cell health was assessed. In parallel, recombinant adenoviruses containing the mutations responsible for human hypertrophic cardiomyopathy (HCM) in the beta myosin gene (R403Q and R453C) were generated and used as a tool to study the acute effects of HCM. Expression and incorporation of the HCM mutant myosins in NRVMs were sufficient to cause a cellular disease phenotype; this work presents initial characterizations of the morphological, functional, and molecular differences. Cells cultured in 3D were viable and presented a heathly baseline for cardiomyocytes. This merits further studies to implement a 3D cell culture system to more accurately assess cellular disease characteristics. Disease progression can be deconvoluted if the characteristics are compared to a baseline that more appropriately resembles the healthy native tissue. This work and the possible future studies provide a foundation for better disease characterizations that can promote effective drug development.
Inter and intra-specific variation in photosynthetic acclimation response to long term exposure of elevated carbon dioxide

The response of intra and interspecific variation in photosynthetic acclimation to growth at elevated atmospheric CO{sub 2} concentration (600{micro}mol mol-l) in six important grassland species was investigated. Plants were grown in a background sward of Lolium perenne and measurements were made after four years of growth at elevated C{sub a}. Elevated CO{sub 2} was maintained using a FACE (Free-Air Carbon Enrichment) system. Significant intra and interspecific variation in acclimation response was demonstrated. The response of adaxial and abaxial stomatal conductance to elevated CO{sub 2} was also investigated. The stomatal conductance of both the adaxial and abaxial leaf surfaces was found to be reduced by elevated C{sub a}. Significant asymmetric responses in stomatal conductance was demonstrated in D. glomerata and T. pratense. Analysis of stomatal indices and densities indicated that the observed reductions in stomatal conductance were probably the result of changes in stomatal aperture.
SCANNING PROBE MICROSCOPY : SYSTEM ANALYSIS APPROACH TO THE FEEDBACK ADJUSTMENT

Scanning Probe Microscopy, a large family of microscopies, is a sensitive technique with unprecedented resolution. However, the accuracy of the measurement is strongly influenced by the setting and calibration of the apparatus. In this article, we present system analysis approach to the problem of the feedback adjustment and probe’s stiffness selection. 1 Scanning Probe Microscopy The principle of Scanning Probe Microscopy [1, 3, 5–7] resides in the force/field interaction between very small probe (typically with the radius of curvature in the order of ones or tens of nanometers) and the sample. Types of interactions are namely: • Atomic forces, such as van der Waals forces, Pauli repulsion, etc. . • Tunneling current. • Electrostatic force. • Optical force. • Electromagnetic reflection. • Chemical forces. • and many others. Since the Scanning Probe Microscopy is able to measure only a local interaction, the topography is reconstructed by scanning the surface of the sample. Scanning Probe Microscopy is also widely used as a non-imaging technique enabling measurement of the local properties of a sample, such as Young’s modulus, permittivity, charge density, adhesion, etc. To maintain desired precision of measurement, feedback is used in various operation modes of the Scanning Probe Microscopy. In this article, we present system analysis approach to the problem of the feedback adjustment and probe’s stiffness selection, which is based on our previous work [4]. 2 Linear Model Considering linear model based on damped oscillator [2] (see Fig. 1), we may represent probesample system by following equation of the motion m d2z dt2 + β dz dt + (k + κ)z = κzo, (1) where m is the effective mass, k is the spring constant, and β is the drag (damping) of the probe, zo is the topography of unloaded sample, κ is the surface stiffness of the sample, and z is the sample-probe distance. To be accurate, we must note that κ contains also the stiffness of the interaction; however, this not important in the linear regime. Feedback loop connected to a certain type of actuator is used in order to keep the setpoint and enhance the sensitivity in case of high k/κ ratio. The proportional-integral regulation is
Mühendislik Eğitiminde Uzamsal Görselleştirme Becerisinin Akademik Başarıya Etkisinin Araştırılması

Muhendislerin sahip olmasi gereken en onemli ozelliklerden biri, teknik alandaki sorunlara bilimsel esaslar isiginda ekonomik cozumler uretmesidir. Muhendislerden, sistem ve kavramlari zihinlerinde canlandirarak analitik dusunmesi ve hizli bir sekilde sonuca gitmesi beklenir. Bu nitelikleri saglayan temel unsur, uzamsal gorsellestirme becerisi olarak ifade edilen nesne ve kavramlari zihinsel olarak uc boyutlu gorsellestirme becerisidir. Bu calismada bu becerinin onemi ve gelistirilmesi icin yapilan calismalar incelenmis, 2017-2018 ogretim yili guz doneminde Harran Universitesi Muhendislik Fakultesi Makine Muhendisliginde teknik cizim dersi alan ogrencilerin uzamsal gorsellestirme becerileri ile akademik basarilari arasindaki iliski arastirilmistir.
Selective and Aggregate Disclosure Dhananjay

We study the disclosure strategy of a rms manager who may privately observe two signals that are informative about the rms prospects. The two signals correspond to the rms two projects and are observationally correlated, i.e., the observation of one a¤ects the likelihood of observing the other. If the manager makes a separate disclosure of each signal, we show that, there exists a "selective" disclosure equilibrium where the manager is "falsely modest"; i.e., he sometimes suppresses favorable information. We then demonstrate that this equilibrium may result in lower welfare than an aggregate disclosure regime, where the manager is restricted to disclosing the aggregate of the two signals, even though it garbles information.
The Relationship between Iranian Intermediate EFL Learners’ Frequency of Language Learning Strategies Use and Their Pragmatic and Grammatical Awareness

In this study, attempts were made to investigate the use of language learning strategies in four areas of communicative competence among Iranian intermediate learners and also the extent of their pragmatic and grammatical awareness. The relationship between the participants' frequency of grammatical strategies use and their pragmatic and grammatical awareness was also explored. In so doing, after conducting the Oxford placement test on a group of students in Islamic Azad University, Najafabad Branch, 63 homogeneous intermediate students were selected. The required data were collected through administrating Language Learning Strategies for Communicative Competence questionnaire to determine the use of language learning strategies by the participants and Pragmatic and Grammaticality Judgment Task questionnaire to determine their pragmatic and grammatical awareness. The findings revealed that the participants used grammatical strategies more frequently and sociolinguistic strategies less frequently than other types of strategies. Furthermore, the descriptive statistics demonstrated that the participants had more grammatical awareness and perceived the grammatical errors more seriously in comparison to pragmatic ones. Finally, correlational analysis displayed there was no correlation between the participants’ frequency of grammatical strategies use and their pragmatic awareness. These findings demonstrate the participants’ weakness in employing sociolinguistic strategies and their lack of pragmatic awareness.
PAN-CHROMATIC OBSERVATIONS OF THE REMARKABLE NOVA LARGE MAGELLANIC CLOUD 2012

We present the results of an intensive multiwavelength campaign on nova LMC 2012. This nova evolved very rapidly in all observed wavelengths. The time to fall two magnitudes in the V band was only 2 days. In X-rays the super soft phase began 13 ± 5 days after discovery and ended around day 50 after discovery. During the super soft phase, the Swift/XRT and Chandra spectra were consistent with the underlying white dwarf (WD) being very hot, ∼1 MK, and luminous, ∼1038 erg s−1. The UV, optical, and near-IR photometry showed a periodic variation after the initial and rapid fading had ended. Timing analysis revealed a consistent 19.24 ± 0.03 hr period in all UV, optical, and near-IR bands with amplitudes of ∼0.3 mag which we associate with the orbital period of the central binary. No periods were detected in the corresponding X-ray data sets. A moderately high inclination system, i = 60 ± 10 ° ? > , was inferred from the early optical emission lines. The HST/STIS UV spectra were highly unusual with only the N v (1240 Å) line present and superposed on a blue continuum. The lack of emission lines and the observed UV and optical continua from four epochs can be fit with a low mass ejection event, ∼10−6 M ⊙ ? > , from a hot and massive WD near the Chandrasekhar limit. The WD, in turn, significantly illuminated its subgiant companion which provided the bulk of the observed UV/optical continuum emission at the later dates. The inferred extreme WD characteristics and low mass ejection event favor nova LMC 2012 being a recurrent nova of the U Sco subclass.
Conditional Autocorrelation and Integration of Emerging Stock Markets

This paper considers the relationship between stock market autocorrelation and i) the presence of international investors which is proxied by the level of capital market integration, and ii) stock market volatility. Drawing from a sample of stock indices for a range of emerging or newly emerged markets, significant evidence of a relationship between the presence of international investors and the level of stock market autocorrelation is found. This evidence is consistent with the view that international investors are positive feedback traders. Robustness testing of this model suggests that the trading strategy of international investors changed as a result of the Asian currency crisis. The evidence for the role of volatility in explaining autocorrelation is, however, is generally weak and varies across the sample countries. JEL: G15, F36