Miracle-dz/UniFAR-FTUs huggingface dataset:
Language-independent sandboxing of just-in-time compilation and self-modifying code

When dealing with dynamic, untrusted content, such as on the Web, software behavior must be sandboxed, typically through use of a language like JavaScript. However, even for such specially-designed languages, it is difficult to ensure the safety of highly-optimized, dynamic language runtimes which, for efficiency, rely on advanced techniques such as Just-In-Time (JIT) compilation, large libraries of native-code support routines, and intricate mechanisms for multi-threading and garbage collection. Each new runtime provides a new potential attack surface and this security risk raises a barrier to the adoption of new languages for creating untrusted content. Removing this limitation, this paper introduces general mechanisms for safely and efficiently sandboxing software, such as dynamic language runtimes, that make use of advanced, low-level techniques like runtime code modification. Our language-independent sandboxing builds on Software-based Fault Isolation (SFI), a traditionally static technique. We provide a more flexible form of SFI by adding new constraints and mechanisms that allow safety to be guaranteed despite runtime code modifications. We have added our extensions to both the x86-32 and x86-64 variants of a production-quality, SFI-based sandboxing platform; on those two architectures SFI mechanisms face different challenges. We have also ported two representative language platforms to our extended sandbox: the Mono common language runtime and the V8 JavaScript engine. In detailed evaluations, we find that sandboxing slowdown varies between different benchmarks, languages, and hardware platforms. Overheads are generally moderate and they are close to zero for some important benchmark/platform combinations.
Fuzzy time series based on defining interval length with Imperialist Competitive Algorithm

Determining interval length in fuzzy time series has been one of the main concerns of many researchers in this area. Since an interval length has a continuous nature, in this paper, a novel metaheuristic algorithm (ICA), Imperialist Competitive Algorithm, is implemented. ICA can determine accurate interval length and it directly leads to results of fuzzy time series. For checking the validity of proposed model and algorithm, three well known bench mark problems, Daily Temperature in Taipei (Taiwan (1996), TAIFEX series (1996), and Alabama University Enrollment, is used. The results show that the proposed model can reduce both MSE and MAPE in all above mentioned bench mark problems.
Video games in education

Computer and video games are a maturing medium and industry and have caught the attention of scholars across a variety of disciplines. By and large, computer and video games have been ignored by educators. When educators have discussed games, they have focused on the social consequences of game play, ignoring important educational potentials of gaming. This paper examines the history of games in educational research, and argues that the cognitive potential of games have been largely ignored by educators. Contemporary developments in gaming, particularly interactive stories, digital authoring tools, and collaborative worlds, suggest powerful new opportunities for educational media.
Phonological activation during reading : Time-course or Conscious Awareness ?

Past studies have shown that nonwords homophonic to words can produce phonological priming (klip -CLIP), even when the primes are presented in a masked fashion (Ferrand & Grainger, 1992). This suggests that phonological codes are automatically activated and used in written word recognition. Here, we raise the possibility that in these experiments, subjects might have occasionally been aware of the primes, and that prime awareness is a necessary condition for phonological priming to arise. Across a large range of prime duration (43ms to 100ms), and a total of 238 subjects, we found phonological priming to be restricted to subjects who were consciously aware of the prime, whatever the prime duration. In contrast, we uncovered a small but statistically reliable nonword repetition priming effect, which was not dependant on prime awareness, and increased as a function of prime duration. We discuss these findings in terms of current models of written word recognition and general issues regarding the distinction between automatic and strategic processes.
Cephalic and Limb Anatomy of a New Isoxyid from the Burgess Shale and the Role of “Stem Bivalved Arthropods” in the Disparity of the Frontalmost Appendage

We herein describe Surusicaris elegans gen. et sp. nov. (in Isoxyidae, amended), a middle (Series 3, Stage 5) Cambrian bivalved arthropod from the new Burgess Shale deposit of Marble Canyon (Kootenay National Park, British Columbia). Surusicaris exhibits 12 simple, partly undivided biramous trunk limbs with long tripartite caeca, which may illustrate a plesiomorphic “fused” condition of exopod and endopod. We construe also that the head is made of five somites (= four segments), including two eyes, one pair of anomalocaridid-like frontalmost appendages, and three pairs of poorly sclerotized uniramous limbs. This fossil may therefore be a candidate for illustrating the origin of the plesiomorphic head condition in euarthropods, and questions the significance of the “two-segmented head” in, e.g., fuxianhuiids. The frontalmost appendage in isoxyids is intriguingly disparate, bearing similarities with both dinocaridids and euarthropods. In order to evaluate the relative importance of bivalved arthropods, such as Surusicaris, in the hypothetical structuro-functional transition between the dinocaridid frontal appendage and the pre-oral—arguably deutocerebral—appendage of euarthropods, we chose a phenetic approach and computed morphospace occupancy for the frontalmost appendages of 36 stem and crown taxa. Results show different levels of evolutionary decoupling between frontalmost appendage disparity and body plans. Variance is greatest in dinocaridids and “stem bivalved” arthropods, but these groups do not occupy the morphospace homogeneously. Rather, the diversity of frontalmost appendages in “stem bivalved” arthropods, distinct in its absence of clear clustering, is found to link the morphologies of “short great appendages,” chelicerae and antennules. This find fits the hypothesis of an increase in disparity of the deutocerebral appendage prior to its diversification in euarthropods, and possibly corresponds to its original time of development. The analysis of this pattern, however, is sensitive to the—still unclear—extent of polyphyly of the “stem bivalved” taxa.
On the Estrada Index of Bipartite Graph 1

For a graph G of n vertices, let λ1 ,λ 2, ··· ,λ n be the eigenvalues of its adjacency matrix. The Estrada index of G is defined by EE(G )= n " i=1 e λi . In this paper, we give some new lower and upper bounds for EE of bipartite graphs. We determine the first three trees with the greatest Estrada index.
Parietal Lobe Contribution to Mental Rotation Demonstrated with rTMS

A large number of imaging studies have identified a role for the posterior parietal lobe, in particular Brodmann's area 7 and the intraparietal sulcus (IPS), in mental rotation. Here we investigated whether neural activity in the posterior parietal lobe is essential for successful mental rotation performance by observing the effects of interrupting this activity during the execution of a mental rotation task. Repetitive transcranial magnetic stimulation (rTMS) was applied to posterior parietal locations estimated to overlie Brodmann's area 7 in the right and the left hemisphere, or to a posterior midline location (sham condition). In three separate experiments, rTMS (four pulses, 20 Hz) was delivered at these locations either 200400, 400600, or 600800 msec after the onset of a mental rotation trial. Disrupting neural activity in the right parietal lobe interfered with task performance, but only when rTMS was delivered 400 to 600 msec after stimulus onset. Stimulation of the left parietal lobe did not reliably affect mental rotation performance at any of the time points investigated. The time-limited effect of rTMS was replicated in a fourth experiment that directly compared the effects of rTMS applied to the right parietal lobe either 200400 or 400600 msec into the mental rotation trial. The results indicate that the right superior posterior parietal lobe plays an essential role in mental rotation, consistent with its involvement in a variety of visuospatial and visuomotor transformations.
Enhanced Use of IT: A New Perspective on Post-Adoption

A major problem confronting organizations is that they make large investments in information technologies (IT) that, in many cases, underperform following adoption because their features are underutilized. In information systems (IS) research, there is a need to develop a better understanding of the process by which individuals make new use of IT features. Using a grounded theory approach, we develop such an understanding by closely examining how individuals change their IT use following initial adoption. Based on analyzing interview data and expanding on extant literature to refine our results, we propose a construct called “enhanced use”, which refers to novel ways of employing IT features. We conceptualize enhanced use as having distinct forms (using a formerly unused set of available features, using an IT for additional tasks, and/or using extensions of IT features and attributes). Our analysis reveals that these forms may differ in terms of their attributes (locus of innovation, extent of extensive use, and adaptation). Our study uncovers patterns of use that reveal the roles played by task characteristics, knowledge, and the IT type in shaping enhanced use. Thus, this study heeds repeated calls to theorize about use by proposing a novel and rich conceptualization of post-adoption use.
Analyzing the supply chain for a large logistics operation using simulation

This paper presents a case study of using simulation for analyzing the impact of proposed changes in the supply chain processes for a large logistics operation. The major changes explored include business process changes, and use of new supply chain software. The results of the analysis indicate that the changes in forecast accuracy provide much larger savings compared to process automation changes. A number of insights are drawn from the results of the analyses.
Suited for Success? Suits, Status, and Hybrid Masculinity

This article analyzes the sartorial biographies of four Canadian men to explore how the suit is understood and embodied in everyday life. Each of these men varied in their subject positions—body shape, ethnicity, age, and gender identity—which allowed us to look at the influence of men’s intersectional identities on their relationship with their suits. The men in our research all understood the suit according to its most common representation in popular culture: a symbol of hegemonic masculinity. While they wore the suit to embody hegemonic masculine configurations of practice—power, status, and rationality—most of these men were simultaneously marginalized by the gender hierarchy. We explain this disjuncture by using the concept of hybrid masculinity and illustrate that changes in the style of hegemonic masculinity leave its substance intact. Our findings expand thinking about hybrid masculinity by revealing the ways subordinated masculinities appropriate and reinforce hegemonic masculinity.
Bio-genetic vs. psycho-environmental conceptions of schizophrenia and their role in perceiving patients in human terms

Abstract Two studies addressed whether a bio-genetic (vs. psycho-environmental) perspective of schizophrenia leads mental health professionals to see a patient that was diagnosed with schizophrenia as less human. The bio-genetic vs. psycho-environmental conceptualization of schizophrenia was manipulated experimentally in Study 1 and assessed in Study 2. Participants read a case study of a patient diagnosed with schizophrenia, followed by measures of dehumanization, attitudes towards restraining and burnout (only Study 2). In both studies a bio-genetic rather than a psycho-environmental conceptualization of schizophrenia led to the person being perceived in less human terms. Moreover, results of Study 2 showed that such a conception was linked with more favorable attitudes towards restraint methods and lower burnout rates. We discuss the clinical and practical implications of our findings linking etiological beliefs of schizophrenia with the perception of patients in human terms.
Reionization of Hydrogen and Helium by Early Stars and Quasars

We compute the reionization histories of hydrogen and helium caused by the ionizing radiation fields produced by stars and quasars. For the quasars we use a model based on halo-merger rates that reproduces all known properties of the quasar luminosity function at high redshifts. The less constrained properties of the ionizing radiation produced by stars are modeled with two free parameters: (i) a transition redshift, ztran, above which the stellar population is dominated by massive, zero-metallicity stars and below which it is dominated by a Scalo mass function; and (ii) the product of the escape fraction of stellar ionizing photons from their host galaxies and the star formation efficiency, fescf*. We constrain the allowed range of these free parameters at high redshifts on the basis of the lack of the H I Gunn-Peterson trough at z ≲ 6 and the upper limit on the total intergalactic optical depth for electron scattering, τes < 0.18, from recent cosmic microwave background (CMB) experiments. We find that quasars ionize helium by a redshift z ~ 4, but cannot reionize hydrogen by themselves before z ~ 6. A major fraction of the allowed combinations of fescf* and ztran leads to an early peak in the ionized fraction because of the presence of metal-free stars at high redshifts. This sometimes results in two reionization epochs, namely, an early H II or He III overlap phase followed by recombination and a second overlap phase. Even if early overlap is not achieved, the peak in the visibility function for scattering of the CMB often coincides with the early ionization phase rather than with the actual reionization epoch. Consequently, τes does not correspond directly to the reionization redshift. We generically find values of τes ≳ 7%, which should be detectable by the MAP satellite.
“And I Hope You See Things That Startle You”: What Students Can Teach Us About Physical Education

Current conceptualizations of student learning recognize the active, constructivist, and mutually influential nature of student-teacher interactions in the shared class environment. Since students and teachers enter the classroom with potentially different prior experiences and current beliefs, their interpretation of class events may not be the same. Those differences may lead to misunderstandings and conflict; therefore, it is important to examine the student perspective on physical education. This paper offers two examples—curricular values and teaching styles—of student-teacher similarities and differences, and how those similarities and differences impact what does and does not happen in physical education class. A consistent theme across both examples is the importance of both achievement and nonachievement factors, and suggestions are offered for how physical education might better incorporate both factors to increase student learning and student and teacher enjoyment.
Granule Cell Ascending Axon Excitatory Synapses onto Golgi Cells Implement a Potent Feedback Circuit in the Cerebellar Granular Layer

The function of inhibitory interneurons within brain microcircuits depends critically on the nature and properties of their excitatory synaptic drive. Golgi cells (GoCs) of the cerebellum inhibit cerebellar granule cells (GrCs) and are driven both by feedforward mossy fiber (mf) and feedback GrC excitation. Here, we have characterized GrC inputs to GoCs in rats and mice. We show that, during sustained mf discharge, synapses from local GrCs contribute equivalent charge to GoCs as mf synapses, arguing for the importance of the feedback inhibition. Previous studies predicted that GrC-GoC synapses occur predominantly between parallel fibers (pfs) and apical GoC dendrites in the molecular layer (ML). By combining EM and Ca2+ imaging, we now demonstrate the presence of functional synaptic contacts between ascending axons (aa) of GrCs and basolateral dendrites of GoCs in the granular layer (GL). Immunohistochemical quantification estimates these contacts to be ∼400 per GoC. Using Ca2+ imaging to identify synaptic inputs, we show that EPSCs from aa and mf contacts in basolateral dendrites display similarly fast kinetics, whereas pf inputs in the ML exhibit markedly slower kinetics as they undergo strong filtering by apical dendrites. We estimate that approximately half of the local GrC contacts generate fast EPSCs, indicating their basolateral location in the GL. We conclude that GrCs, through their aa contacts onto proximal GoC dendrites, define a powerful feedback inhibitory circuit in the GL.
Bayesian optimal reconstruction of the primordial power spectrum

The form of the primordial power spectrum has the potential to differentiate strongly between competing models of perturbation generation in the early universe and so is of considerable importance. The recent release of five years of WMAP observat ions have confirmed the general picture of the primordial power spectrum as deviating s lightly from scale invariance with a spectral tilt parameter of ns � 0:96. Nonetheless, many attempts have been made to isolate further features such as breaks and cutoffs using a variety o f methods, some employing more than� 10 varying parameters. In this paper we apply the robust techni que of Bayesian model selection to reconstruct the optimal degree of structure in the spectrum. We model the spectrum simply and generically as piecewise linear in ln k between ‘nodes’ in k-space whose amplitudes are allowed to vary. The number of nodes and their k-space positions are chosen by the Bayesian evidence so that we can identify both the complexity and location of any detected features. Our optimal reconstruction contains, p erhaps, surprisingly few features, the data preferring just three nodes. This reconstruction allo ws for a degree of scale dependence of the tilt with the ‘turn-over’ scale occuring around k � 0:016 Mpc 1 . More structure is penalised by the evidence as over-fitting the data, so there is c urrently little point in attempting reconstructions that are more complex.
Interpreting the relationships between TOEFL iBT scores and GPA: Language proficiency, policy, and profiles

This study examines the predictive validity of the TOEFL iBT with respect to academic achievement as measured by the first-year grade point average (GPA) of Chinese students at Purdue University, a large, public, Research I institution in Indiana, USA. Correlations between GPA, TOEFL iBT total and subsection scores were examined on 1990 mainland Chinese students enrolled across three academic years (N2011 = 740, N2012 = 554, N2013 = 696). Subsequently, cluster analyses on the three cohorts’ TOEFL subsection scores were conducted to determine whether different score profiles might help explain the correlational patterns found between TOEFL subscale scores and GPA across the three student cohorts. For the 2011 and 2012 cohorts, speaking and writing subscale scores were positively correlated with GPA; however, negative correlations were observed for listening and reading. In contrast, for the 2013 cohort, the writing, reading, and total subscale scores were positively correlated with GPA, and the negative correlations disappeared. Results of cluster analyses suggest that the negative correlations in the 2011 and 2012 cohorts were associated with a distinctive Reading/Listening versus Speaking/Writing discrepant score profile of a single Chinese subgroup. In 2013, this subgroup disappeared in the incoming class because of changes made to the University’s international undergraduate admissions policy. The uneven score profile has important implications for admissions policy, the provision of English language support, and broader effects on academic achievement.
Distinct Levels of Dopamine Denervation Differentially Alter Striatal Synaptic Plasticity and NMDA Receptor Subunit Composition

A correct interplay between dopamine (DA) and glutamate is essential for corticostriatal synaptic plasticity and motor activity. In an experimental model of Parkinson's disease (PD) obtained in rats, the complete depletion of striatal DA, mimicking advanced stages of the disease, results in the loss of both forms of striatal plasticity: long-term potentiation (LTP) and long-term depression (LTD). However, early PD stages are characterized by an incomplete reduction in striatal DA levels. The mechanism by which this incomplete reduction in DA level affects striatal synaptic plasticity and glutamatergic synapses is unknown. Here we present a model of early PD in which a partial denervation, causing mild motor deficits, selectively affects NMDA-dependent LTP but not LTD and dramatically alters NMDA receptor composition in the postsynaptic density. Our findings show that DA decrease influences corticostriatal synaptic plasticity depending on the level of depletion. The use of the TAT2A cell-permeable peptide, as an innovative therapeutic strategy in early PD, rescues physiological NMDA receptor composition, synaptic plasticity, and motor behavior.
Sympatric Breeding Auks Shift between Dietary and Spatial Resource Partitioning across the Annual Cycle

When species competing for the same resources coexist, some segregation in the way they utilize those resources is expected. However, little is known about how closely related sympatric breeding species segregate outside the breeding season. We investigated the annual segregation of three closely related seabirds (razorbill Alca torda , common guillemot Uria aalge and Brünnich’s guillemot U . lomvia ) breeding at the same colony in Southwest Greenland. By combining GPS and geolocation (GLS) tracking with dive depth and stable isotope analyses, we compared spatial and dietary resource partitioning. During the breeding season, we found the three species to segregate in diet and/or dive depth, but less in foraging area. During both the post-breeding and pre-breeding periods, the three species had an increased overlap in diet, but were dispersed over a larger spatial scale. Dive depths were similar across the annual cycle, suggesting morphological adaptations fixed by evolution. Prey choice, on the other hand, seemed much more flexible and therefore more likely to be affected by the immediate presence of potential competitors.
Face-to-Face vs. CMC: Student communication in a technologically rich learning environment

Observations of student behaviour in the first year of a new degree program showed several unexpected behaviours with regard to the use of several computer-mediated communication methods. A detailed survey of communication behaviour within the degree was undertaken, assessing how much, and for what purposes, students used the available methods of communication, and what they perceived to be the strengths and weaknesses of each method of communication. The results show that face-to-face communication is preferred over all forms of computer-mediated communication. The findings of the study highlight the pedagogical advantages of being flexible in terms of the communication methods students can use. Specifically, while some of the devices provided by staff were not used by students, others not formally introduced into the degree were embraced by the majority of students.