Miracle-dz/UniFAR-FTUs huggingface dataset:
Did I Tweet That?: Local Sports Broadcasters Are Not Using Twitter How They Think They Are

The purpose of this study was to examine how local sports broadcasters are using Twitter and if they are utilizing the service in the manner that they think they are. A mixed-methods approach was used to gather the data. A content analysis of 19,649 tweets from 201 local sports broadcasters throughout the country revealed the content of the tweets that were sent over a two-week period. Additionally, a survey was conducted with the owners of the same accounts to ask them about their Twitter use. Results determined that the local sports broadcasters were most frequently live-tweeting a game when using the social network. The survey responses revealed that the local sports broadcasters did not have an accurate assessment of their own Twitter activity, as most incorrectly identified which type of tweet they send most frequently. This demonstrates that most broadcasters are not stopping to think about what types of tweets they are sending to their followers.
Tracing the Assessment Triangle for Formative Assessment: Not All Learning Progressions Are Created Equal

Lai and colleagues (this issue) add to a significant body of research that explicitly or implicitly draws on the National Research Council (NRC, 2001) assessment triangle to iteratively develop learning progressions (LPs) and associated assessment items. The resulting LPs have been proposed to fulfill a number of different purposes and, thus, the associated assessment items—in addition to being used to investigate the LPs themselves—may be intended for different applications. As Lai et al. highlight, there has been recent interest in the use of LPs to support teachers’ formative assessment practices (e.g., Black, Wilson, & Yao, 2011; Furtak, 2012; Heritage, 2008). However, what is meant by “learning progressions” in this context varies widely. In this commentary, I describe how the assessment triangle can be particularly helpful for informing the formative assessment process. I then describe variation in discourse about LPs and clarify the specific characteristics of LPs that seem most productive for their use as the model of cognition for an assessment triangle for formative assessment.
Power supply di/dt measurement using on-chip di/dt detector circuit

This paper demonstrates an on-chip di/dt detector circuit. The di/dt detector circuit consists of a spiral inductor under the power supply line which induces a di/dt proportional voltage, and an amplifier which amplifies and outputs the value. The measurement results show that the di/dt detector output and the voltage difference between a resistor have good agreement. The di/dt detector also measures the de-coupling capacitor effects for the di/dt reduction.
A GEOCLIM simulation of climatic and biogeochemical consequences of Pangea breakup

Large fluctuations in continental configuration occur throughout the Mesozoic. While it has long been recognized that paleogeography may potentially influence atmospheric CO2 via the continental silicate weathering feedback, no numerical simulations have been done, because of the lack of a spatially resolved climate‐carbon model. GEOCLIM, a coupled numerical model of the climate and global biogeochemical cycles, is used to investigate the consequences of the Pangea breakup. The climate module of the GEOCLIM model is the FOAM atmospheric general circulation model, allowing the calculation of the consumption of atmospheric CO2 through continental silicate weathering with a spatial resolution of 7.5°long × 4.5°lat. Seven time slices have been simulated. We show that the breakup of the Pangea supercontinent triggers an increase in continental runoff, resulting in enhanced atmospheric CO2 consumption through silicate weathering. As a result, atmospheric CO2 falls from values above 3000 ppmv during the Triassic down to rather low levels during the Cretaceous (around 400 ppmv), resulting in a decrease in global mean annual continental temperatures from about 20°C to 10°C. Silicate weathering feedback and paleogeography both act to force the Earth system toward a dry and hot world reaching its optimum over the last 260 Myr during the Middle‐Late Triassic. In the super continent case, given the persistent aridity, the model generates high CO2 values to produce very warm continental temperatures. Conversely, in the fragmented case, the runoff becomes the most important contributor to the silicate weathering rate, hence producing a CO2 drawdown and a fall in continental temperatures. Finally, another unexpected outcome is the pronounced fluctuation in carbonate accumulation simulated by the model in response to the Pangea breakup. These fluctuations are driven by changes in continental carbonate weathering flux. Accounting for the fluctuations in area available for carbonate platforms, the simulated ratio of carbonate deposition between neritic and deep sea environments is in better agreement with available data.
THE RECEPTIVE FIELDS OF OPTIC NERVE FIBERS

Appreciation of the form of the retinal image depends upon a correspondence between the distribution of light on the retina and the distribution of activity among the fibers of the optic nerve. This correspondence may be studied directly by recording the activity in single optic nerve fibers in response to illuminating various parts of the retina. A given optic nerve fiber responds to light only if a particular region of the retina receives illumination. This region is termed the receptive field of that fiber. In a previous paper describing the responses in single optic nerve fibers from the cold-blooded vertebrate eye (Hartline, 1938) it was noted that the receptive fields of the optic nerve fibers are of small but appreciable extent, and that their locations on the retina are fixed. It is the purpose of the present paper to describe further the characteristics of receptive fields, and to discuss some of the spatial factors involved in the excitation of the fibers of the optic nerve. METHOD. The method for recording the activity in single optic nerve fibers from the eyes of cold-blooded vertebrates has been described in the previous paper (lot. cit.). An eye is excised, cut open, and small bundles of optic nerve fibers are dissected from the anterior surface of the exposed retina. The action potentials in these bundles are amplified and recorded with an oscillograph. When such a bundle has been split successfully , until only a single active fiber remains, the retina must be searched with a small spot of light to determine the region supplying that fiber. This search is aided by noting the direction, on the retina, from which the nerve fibers in the small bundle come, and by using large spots of light at first to locate the approximate position of the sensitive region. The optical system employed in these experiments has likewise been described. A spot of light of suitable size is projected upon the exposed retina; the coordinates of its position, referred to an arbitrary point of origin on the retina, are obtained from readings of crossed micrometers which control its location. The micrometer readings are reduced to millimeters on the retina by multiplying them by the magnification of the optical system (0.32 or 0.15). Sharpness of focus of the spot on the retina 690
Support Vector Machine (SVM) and the Neural Networks for Segmentation the Magnetic Resonance Imaging

In this paper a classification algorithms MLP and S VM for the segmentation tissue of brain magnetic resonance images is proposed. Magnetic resonance imaging (MRI) segmentation is an important technique to differentiate abnormal and normal tissues in MR ima ge data. The method interleaves classification with estimation of the model parameters, improving the classification at each iteration. This approach uses the informati on from the proton density (PD)- and T2-weighted and lattice relaxatio n time (T1) attenuation images. This works presents an NNN's and SVM (Support Vector Machine) for segmentation of mixed tissue in each voxels, for each voxels en calcu late the mean, variance and co-variance are the input of neural ne twork, to evaluate the performance on computed the misclassify rate image data and mixed tissue models. Segmentation tissue results from various algorithms are compared a nd the effectiveness and robustness of the proposed approa ch are demonstrated.
Random Beamforming in Spatially Correlated Multiuser MISO Channels

In this paper, we propose a new beamforming scheme that generates beams by exploiting the spatial correlation in multiuser environments. The proposed scheme generates random beams using eigenvectors corresponding to dominant eigenvalues of the channel covariance matrix, increasing the multiuser diversity gain. Moreover, it can obtain an additional SNR gain by transmitting the signal with a beam weight coherent to the effective channel corresponding to dominant eigenvectors of the channel covariance matrix of a selected user. Simulation results show that the proposed scheme is quite effective in correlated channel environments.
Urinary excretion of leukotriene E4 and eosinophil protein X in children with atopic asthma.

Measurement of leukotriene E4 (LTE4) in urine is a noninvasive method for assessing changes in the rate of total body cysteinyl leukotriene production. Eosinophil protein X (EPX) has been used to assess eosinophil activity and monitor inflammation in bronchial asthma. The aim of the study was to look for differences in urinary LTE4 and EPX concentrations between children with stable atopic asthma and healthy controls and to compare asthmatic children with different disease severity. In addition the relationship was evaluated between urinary LTE4 and EPX levels and lung function. LTE4 was also measured (enzyme immunoassay) together with EPX (radioimmunoassay) in urine and lung function tests were carried out in children with mild asthma (steroid-naive) (n=49), moderate to severe asthma (using inhaled steroids) (n=31) and healthy control subjects (n=28). Urinary leukotriene E4 (LTE4) was significantly higher in children with asthma than in controls (median [25-75 percentile] 238.5 (126.5-375.7) SD 191.8 versus 189 (51-253.2) SD 131.7 pg.mg(-1) creatinine; p=0.021). Urinary EPX was also significantly increased in asthmatic children compared with controls (85.5 [64-131.5] SD 76.2 versus 48.5 [43.2-90] 112.1 microg x mmol(-1) creatinine; p=0.006). There were no differences in urinary LTE4 and EPX between the group of mild and the group of moderate to severe asthmatic children. There were significant associations between the urinary LTE4 and intrathoracic gas volume (ITGV), residual volume (RV), forced expiratory volume in one second (FEV1), forced expiratory capacity (FVC) and maximum expiratory flow rate at 25% of vital capacity (MEF25). Urinary EPX was only correlated with maximum expiratory flow rate at 75% of vital capacity (MEF75). Thus measurement of urinary LTE4 may predict the degree of airflow obstruction in asthmatic children. Urinary LTE4 and EPX are useful markers of airway inflammation and can be helpful in guiding asthma management. There was no correlation between LTE4 and EPX levels.
Estrategias de resolución de problemas en la formación docente. Estudios de casos

Este articulo utiliza los fondos economicos del proyecto “Las marginaciones personales y la utilidad social del saber escolar” y referencia GVAICO2016-092, en el marco de la convocatoria de la Conselleria d’Educacio, Cultura i Esports para Ayudas para Grupos de Investigacion Consolidables.
Detection of Early-Stage Pancreatic Adenocarcinoma

Background: Pancreatic adenocarcinoma is an almost universally lethal disease, in large part, due to our inability to detect early-stage disease. Monoclonal antibody PAM4 is reactive with a unique biomarker expressed by >85% of pancreatic adenocarcinomas. In this report, we examined the ability of a PAM4-based immunoassay to detect early-stage disease. Materials and Methods: The PAM4-based immunoassay was used to quantitate antigen in the serum of healthy volunteers (n = 19), patients with known pancreatic adenocarcinoma (n = 68), and patients with a primary diagnosis of chronic pancreatitis (n = 29). Results: Sensitivity for detection of pancreatic adenocarcinoma was 82%, with a false-positive rate of 5% for healthy controls. Patients with advanced disease had significantly higher antigen levels than those with early-stage disease (P < 0.01), with a diagnostic sensitivity of 91%, 86%, and 62% for stage 3/stage 4 advanced disease, stage 2, and stage 1, respectively. We also evaluated chronic pancreatitis sera, finding 38% positive for antigen; however, this was discordant with immunohistochemical findings that suggest the PAM4 antigen is not produced by inflamed pancreatic tissue. Furthermore, several of the serum-positive pancreatitis patients, for whom tissue specimens were available for pathologic interpretation, had evidence of neoplastic precursor lesions. Conclusions: These results suggest the use of the PAM4 serum assay to detect early-stage pancreatic adenocarcinoma and that positive levels of PAM4 antigen are not derived from inflamed pancreatic tissues but rather may provide evidence of subclinical pancreatic neoplasia. Effect: The ability to detect pancreatic adenocarcinoma at an early stage could provide for early therapeutic intervention with potentially improved patient outcomes. Cancer Epidemiol Biomarkers Prev; 19(11); 2786–94. ©2010 AACR.
Combining interference alignment and Alamouti codes for the 3-user MIMO interference channel

The interference channel (IC) is the basic underlying channel model for many practical multi-terminal communication scenarios. Here, we consider a modified three-user IC with dual-antenna transmitters and receivers where we allow one receiver to have a finite-rate unidirectional link to another receiver. This kind of receiver-to-receiver link may exist in cellular networks with base-station backhaul. For this scenario we propose a scheme that combines the interference-cancellation capability of Alamouti codes with the subspace-overlapping property of interference alignment to achieve a sum-rate of three symbols/channel use. The scheme does also simultaneously provide a diversity gain of two for every symbol which significantly improves the bit-error rate performance compared to zero-forcing techniques.
Comparison of Examination-Based and Self-Reported Risk Factors for Cardiovascular Disease, Washington State, 2006–2007

Introduction Obesity, hypertension, and high cholesterol are risk factors for cardiovascular disease, which accounts for approximately 20% of deaths in Washington State. For most states, self-reports from the Behavioral Risk Factor Surveillance System (BRFSS) provide the primary source of information on these risk factors. The objective of this study was to compare prevalence estimates of self-reported obesity, hypertension, and high cholesterol with examination-based measures of obesity, hypertension, and high-risk lipid profiles. Methods During 2006–2007, the Washington Adult Health Survey (WAHS) included self-reported and examination-based measures of a random sample of 672 Washington State residents aged 25 years or older. We compared WAHS examination-based measures with self-reported measures from WAHS and the 2007 Washington BRFSS (WA-BRFSS). Results The estimated prevalence of obesity from WA-BRFSS (27.1%; 95% confidence interval [CI], 26.3%–27.8%) was lower than estimates derived from WAHS physical measurements (39.2%; 95% CI, 33.6%–45.1%) (P < .001). Prevalence estimates of hypertension based on self-reports from WA-BRFSS (28.1%; 95% CI, 27.4%–28.8%) and WAHS (33.4%; 95% CI, 29.4%–37.7%) were similar to the examination-based estimate (29.4%; 95% CI, 25.8%–33.4%). Prevalence estimates of high cholesterol based on self-reports from WA-BRFSS (38.3%; 95% CI, 37.5%–39.2%) and WAHS (41.8%; 95% CI, 35.8%–48.1%) were similar; both were lower than the examination-based WAHS estimate of high-risk lipid profiles (59.2%; 95% CI, 54.2%–64.2%) (P < .001). Conclusion Self-reported heights and weights underestimate the prevalence of obesity. The prevalence of self-reported high cholesterol is significantly lower than the prevalence of high-risk lipid profiles. Periodic examination-based measurement provides perspective on routinely collected self-reports.
Gr8 designs for Gr8 girls: a middle-school program and its evaluation

In order to address the under-representation of women in Computer Science, we have created a program for middle-school girls that specifically aims to change their attitudes about CS and encourages them to see it as a potential career. Our assessment of the program shows that it did indeed have a significant, positive impact and suggests that this was still in effect three months later. This paper describes the program and its assessment, and makes suggestions for those considering offering a similar program.
Principal Component Analysis for Dimension Reduction in Massive Distributed Data Sets ∗

We describe a new method for computing a global principal component analysis (PCA) for the purpose of dimension reduction in data distributed across several locations. We assume that a virtual n × p (items × features) data matrix is distributed by blocks of rows (items), where n > p and the distribution among s locations is determined by a given application. Our approach is to perform local PCA on local data without any data movement and then move and merge the local PCA results into a global PCA. The representation of local data by a few local principal components greatly reduces data transfers with minimal degradation in accuracy. We exploit the fact that most high-dimensional data have lower intrinsic dimensionality thus allowing a good lower-dimensional representation. Existing methods that bring data to a central location require O(np) data transfer even if only a few principal components are needed. In the worst case, when an exact PCA is computed, our algorithm is min(O(np),O(sp)). It is of O(sp) data transfer complexity when intrinsic dimensionality is low or when an approximate solution is sufficient. The ability to vary data transfers by controlling precision provides a great deal of flexibility.
Changes of cochlear function during cochlear fluids manipulations

Spatial origins of compound action potential responses to varying stimulation rates, frequencies, and levels were investigated. A technique to measure the regions in the cochlea generating each response in which a neurotoxic drug (kainic acid) is slowly injected into the cochlear apex was used. This induces a progressive ablation of responses from apex (low frequency) to base (high frequency), allowing the spatial origins of cochlear responses to be quantified.
Education Stream

Enterprise Resource Planning (ERP) systems are widely used by large corporations around the world. Recently universities have turned to ERP as a means of replacing existing management and administration computer systems. In this article we provide analysis of the rollout of an ERP system in one particular institution in the UK, the particular focus being on how the development, implementation and use of both generic and university specific functionality is mediated and shaped by a fundamental and long standing tension within universities: this is the extent to which higher education institutions are organisations much like any other and the extent to which they are 'unique'. Our aim is not to resolve this tension but rather to show how similarities and differences are actively constructed and literally 'brought into being' during various phases of this technical project. This occurs both as a process of standardisation within the University and as series of struggles to customise the system. Our conclusion is that managing this process has become a key task, as well as difficulty for universities. The research presented here is based on a participant observation study carried over the period of three years, and is informed by ideas from actor network theory as well as material culture.
Unconscious integration of pointing relation between two masked arrows

ABSTRACT In the present study, by using a briefly masked prime display paradigm, we investigated whether the pointing relation (same or different) between two unconsciously perceived arrows in the prime could be processed. Since only motor response priming can reflect unconscious processing of two arrows’ pointing-direction relation (i.e., a relational integration), we could distinguish the motor response priming from the visual priming in this study which in other studies were not separated. We also manipulated the prime-to-target stimulus onset asynchronies (SOA) by using a 70 ms and a 180 ms SOA. In this experiment, two masked arrow signs pointing in the same or different directions (> > or > <) were simultaneously presented in the prime, followed by two arrow symbols also pointing in the same or different directions in the target. The participants were asked to decide whether the two arrows in the target were pointing in the same or different directions. The results did not show any visual priming effect, but did show that the unconsciously perceived pointing relation in the prime elicited a positive motor response priming effect in RT under the 70 ms SOA condition, and a negative motor response priming effect in accuracy under the 180 ms SOA condition. The results were discussed in terms of self-motor-inhibition (or mask-triggered inhibition) and attention mechanisms. Overall, this study indicated that the pointing relation between the two subliminal arrows in the prime could influence the subsequent responses to the target and suggested that people can integrate unconsciously perceived information.
Fundamentals of elasticity of ( Mg 1 − x , Fe x ) 2 SiO 4 olivine

[1] We study the influence of iron on the elasticity of (Mg1−x, Fex)2SiO4 olivine (0 ≤ x ≤ 0.125), a major constituent of the Earth’s upper mantle. We calculate static elastic properties by first principles for this solid solution and investigate the effect of atomic arrangement, an artifact of supercell calculations, on all single crystal and poly‐crystalline elastic moduli. From calculated wave propagation velocities we find the heterogeneity ratios of shear to compressional wave velocity, and bulk sound to shear wave velocity. Their values are, though limited to composition considerations, marginally consistent with seismic tomography.Citation: Núñez‐Valdez, M. , K. Umemoto, and R. M.Wentzcovitch (2010), Fundamentals of elasticity of (Mg1−x, Fex)2SiO4 olivine, Geophys. Res. Lett. , 37, L14308, doi:10.1029/2010GL044205.
An E9 multiplet of BPS states

We construct an infinite E9 multiplet of BPS states for 11D supergravity. For each positive real root of E9 we obtain a BPS solution of 11D supergravity, or of its exotic counterparts, depending on two non-compact transverse space variables. All these solutions are related by U-dualities realised via E9 Weyl transformations in the regular embedding E9 ⊂ E10 ⊂ E11. In this way we recover the basic BPS solutions, namely the KK-wave, the M2 brane, the M5 brane and the KK6-monopole, as well as other solutions admitting eight longitudinal space dimensions. A novel technique of combining Weyl reflexions with compensating transformations allows the construction of many new BPS solutions, each of which can be mapped to a solution of a dual effective action of gravity coupled to a certain higher rank tensor field not contained in 11D supergravity. For real roots of E10 which are not roots of E9, we obtain additional BPS solutions transcending 11D supergravity (as exemplified by the lowest level solution corresponding to the M9 brane). The relation between the dual formulation and the one in terms of the original 11D supergravity fields has significance beyond the realm of BPS solutions. We establish the link with the Geroch group of general relativity, and explain how the E9 duality transformations generalize the standard Hodge dualities to an infinite set of 'non-closing dualities'.