Miracle-dz/UniFAR-FTUs huggingface dataset:
A NOTE ON THE SYMPLECTIC EULER METHOD FOR DAES WITH HOLONOMIC CONSTRAINTS

We consider the symplectic Euler method for Hamiltonian systems with holonomic constraints and its generalizations to a class of overdetermined differential-algebraic equations (ODAEs) which are nonlinear in the algebraic variables. It is shown that a straightforward generalization of the symplectic Euler method is inconsistent. A different non-trivial generalization of the symplectic Euler method is then defined and shown to be consistent. Our results are confirmed numerically on a simple test problem.
Surface brightness measurements for APM galaxies

This paper considers some simple surface brightness (SB) estimates for galaxies in the Automated Plate Measuring Machine (APM) catalogue in order to derive homogeneous SB data for a very large sample of faint galaxies. The isophotal magnitude and area are used to estimate the central surface brightness and total magnitude based on the assumption of an exponential SB profile. The surface brightness measurements are corrected for field effects on each UK Schmidt plate and the zero-point of each plate is adjusted to give a uniform sample of SB and total magnitude estimates over the whole survey. Results are obtained for 2.4 million galaxies with blue photographic magnitudes brighter than bJ = 20.5 covering 4300 deg 2 in the region of the south galactic cap. Almost all galaxies in our sample have central surface brightness in the range 20 to 24 bJ mag arcsec 2 . The SB measurements we obtain are compared to previous SB measurements and we find an acceptable level of error of ±0.2 bJ mag arcsec 2 . The distribution of SB profiles is considered for different galaxy morphologies for the bright APM galaxies. We find that early-type galaxies have more centrally concentrated profiles.
Stability of Haptic Rendering: Discretization, Quantization, Time Delay, and Coulomb Effects

Rendering stiff virtual objects remains a core challenge in the field of haptics. A study of this problem is presented, which relates the maximum achievable object stiffness to the elements of the control loop. In particular, we examine how the sampling rate, quantization, computational delay, and amplifier dynamics interact with the inertia, natural viscous, and Coulomb damping of the haptic device. Nonlinear effects create distinct stability regions, and many common devices operate stably, yet in violation of passivity criteria. An energy-based approach provides theoretical insights, supported by simulations, experimental data, and a describing function analysis. The presented results subsume previously known stability conditions
Variable Overhead Effective CSI Signaling for Coordinated Beamforming in TDD MIMO Systems

We propose signaling concepts with variable pilot overhead to provide effective channel state information (CSI) to support decentralized coordinated beamforming for multiantenna terminals in the time division duplex (TDD) mode. The focus is on linear downlink multi-cell transmit-receive processing with underlay device-to-device connections in the context of an iterative weighted sum rate (WSR) maximization algorithm that consists of optimization steps carried out locally by the transmitters. Arbitrary numbers of antennas in the terminals are supported. However, the channel sounding overhead is kept low as each terminal transmits only a few or just one precoded pilot beam in the channel sounding phase, regardless of how many antennas it employs. The overhead reduction hides the weak eigenmodes of the whitened channels, but at the same time the signal-to-noise-ratio of the channel estimation improves as the limited sounding energy is concentrated on the strong eigenmodes.
Gender- and Role-Specific Differences in the Perception of the Concept “Impishness” (based on the results of a psycholinguistic experiment)

The present paper continues a series of articles devoted to ludic competence and the description of its components with the help of psycholinguistic tools and methods. The present article explores another component of ludic competence, i.e. impishness, and the corresponding cultural concept “impishness”. An attempt has been made to single out gender- and role-specific differences in the perception of the verbalized concept “impishness” in the linguistic world-image of the Russian-speaking population of Eastern Ukraine. Psycholinguistic experiment was the main method of research. The sample comprised 400 older adults (aged 30 – 60), male and female respondents being equally represented. Having analyzed the data from the free association experiment with the stimulus “impishness”, it was revealed that everyday consciousness of common representatives of the Ukrainian linguistic culture reflects all the conceptual meanings that are related to impishness in the intercultural domain. The core of the verbalized concept impishness is represented by four semantic clusters (more than 10%): “horseplay”, “play”, “children”, “flirting”. The semantic scope of the concept depends on the gender of the respondents. Thus, for female respondents, the main constituent elements of the concept impishness are children (subject of pranks), as well as foolery and frolicking as manifestations of playful behavior that finds expression in frolic pranks, practical jokes, funny tricks, etc. Male respondents, on the other hand, tend to associate impishness primarily with woman, as well as with immorality, flippant behavior, and various forms of daring, provocative, and imprudent behavior. Therefore, the ambivalent character of the concept “impishness” reveals itself in certain gender- and role-specific differences in its perception. It reveals itself most vividly in behavioral associates and associates that describe various forms of pranks. On the whole, the stimulus “impishness” is generally evaluated as something both positive and negative by all the respondents.11. 25% of the respondents display negative attitude to the stimulus “impishness”.
A Guided Tour of SAFE GENI

GENI is a federated (multi-domain) Infrastructure-as-a-Service (IaaS) system. SAFE GENI is an implementation of the GENI architecture using SAFE, an integrated system for logical trust. This paper gives an overview of the SAFE GENI implementation. It is useful both as an introduction to the GENI architecture and as an example to illustrate how to use SAFE to program network trust.
The Multidimensional Teachers’ Resilience Scale: Validation for Portuguese Teachers

This article presents the validation of the Multidimensional Teachers’ Resilience Scale (MTRS) for Portuguese teachers and proposes a hierarchical model to represent teachers’ resilience. Participants were 334 Portuguese teachers from elementary to secondary school who responded to the MTRS and a global measure of teachers’ resilience. Confirmatory factor analysis provided acceptable fit for a 13-item solution distributed by four factors. Results support the hierarchical structure of teachers’ resilience. Descriptive statistics, reliability analysis, and correlation analysis between the MTRS global score and the global measure of teachers’ resilience suggest that the MTRS is a valid and reliable instrument to assess teachers’ resilience.
Spectral Shaping for Adjacent Band Interference Suppression in Cognitive Radio Systems

Cognitive radio (CR) technology represents a promising solution for solving the problem of spectrum scarcity and underutilization in wireless communications. While orthogonal frequency division multiplexing (OFDM) is regarded as a suitable technology for the CR physical layer, it can suffer from out-of-band radiation, which hinders its spectrum sharing capabilities. In this paper we consider a turbo-coded OFDM based CR system, and propose three methods for shaping the spectrum of the CR signal to reduce interference affecting primary users (PUs) that operate in adjacent bands. The proposed methods use multiple choice sequences (MCS) generated at the bit level by employing different pseudo random bit sequences, by using bit interleavers with different depths, or by a combination of both, respectively. In order to reduce interference to adjacent bands, the sequence with the best spectral shape is transmitted along with its index. Performance of the proposed methods is illustrated with numerical results obtained from simulations, and the trade off between a better spectral shape and the reduction in the spectral efficiency of the systems is discussed.
A Processor Queuing Simulation Model for Multiprocessor System Performance Analysis Thin

This paper describes a processor queueing simulation model for a complex processor that aggressively issues instructions with the use of outof-order, multiple issue and multithreading. The model is developed for memory and system evaluation of memory-intensive commercial OLTP (Online Transaction Processing) workloads on large multiprocessor systems. Our approach differs from detailed cycle accurate and direct-execution simulations in that we do not simulate instruction execution. Instead, we take a high level view, as in analytical models, and model a minimal set of processor components to accurately generate the memory access traffic for system simulation. The model is validated with a cycle accurate simulator and is within 5% accuracy. Results on the effect of store burstiness and memory latencies on overlapping of cache misses and buffer sizing are pre-
Those Who Stayed: Individualism, Self-Selection and Cultural Change During the Age of Mass Migration

This paper examines the joint evolution of emigration and individualism in Scandinavia during the Age of Mass Migration (1850-1920). A long-standing hypothesis holds that people of a stronger individualistic mindset are more likely to migrate as they suffer lower costs of abandoning existing social networks. Building on this hypothesis, I propose a theory of cultural change where migrant self-selection generates a relative push away from individualism, and towards collectivism, in migrantsending locations through a combination of initial distributional e¤ects and channels of intergenerational cultural transmission. Due to the interdependent relationship between emigration and individualism, emigration is furthermore associated with cultural convergence across subnational locations. I combine various sources of empirical data, including historical population census records and passenger lists of emigrants, and test the relevant elements of the proposed theory at the individual and subnational district level, and in the short and long run. Together, the empirical results suggest that individualists were more likely to migrate than collectivists, and that the Scandinavian countries would have been considerably more individualistic and culturally diverse, had emigration not taken place.
Two decades of subcutaneous glatiramer acetate injection: current role of the standard dose, and new high-dose low-frequency glatiramer acetate in relapsing–remitting multiple sclerosis treatment

Glatiramer acetate, a synthetic amino acid polymer analog of myelin basic protein, is one of the first approved drugs for the treatment of relapsing–remitting multiple sclerosis. Several clinical trials have shown consistent and sustained efficacy of glatiramer acetate 20 mg subcutaneously daily in reducing relapses and new demyelinating lesions on magnetic resonance imaging in patients with relapsing–remitting multiple sclerosis, as well as comparable efficacy to high-dose interferon beta. Some preclinical and clinical data suggest a neuroprotective role for glatiramer acetate in multiple sclerosis. Glatiramer acetate is associated with a relatively favorable side-effect profile, and importantly this was confirmed also during long-term use. Glatiramer acetate is the only multiple sclerosis treatment compound that has gained the US Food and Drug Administration pregnancy category B. All these data support its current use as a first-line treatment option for patients with clinical isolated syndrome or relapsing–remitting multiple sclerosis. More recent data have shown that high-dose glatiramer acetate (ie, 40 mg) given three times weekly is effective, safe, and well tolerated in the treatment of relapsing–remitting multiple sclerosis, prompting the approval of this dosage in the US in early 2014. This high-dose, lower-frequency glatiramer acetate might represent a new, more convenient regimen of administration, and this might enhance patients’ adherence to the treatment, crucial for optimal disease control.
Sliding with a constant Q

The linear frequency (constant-bandwidth) scale of the FFT has long been recognised as a disadvantage for audio processing. Long analysis windows are required for adequate low-frequency resolution, while small windows offer lower latency, better handling of transients, and reduced computation cost. A constant-Q form of analysis offers the possibility of increased low-frequency resolution for a given window size, this resolution being essential for many fundamental processing tasks such as pitch shifting. We consider the application of the Sliding Discrete Fourier Transform to a Constant-Q analysis. The increased flexibility of sliding allows for a variety of data alignments, and we produce the mathematical formulation of these. Windowing in the frequency domain introduces further complications. Finally we consider the implementation of the analysis on both serial and parallel computers.
Identifiers.org and MIRIAM Registry: community resources to provide persistent identification

The Minimum Information Required in the Annotation of Models Registry (http://www.ebi.ac.uk/miriam) provides unique, perennial and location-independent identifiers for data used in the biomedical domain. At its core is a shared catalogue of data collections, for each of which an individual namespace is created, and extensive metadata recorded. This namespace allows the generation of Uniform Resource Identifiers (URIs) to uniquely identify any record in a collection. Moreover, various services are provided to facilitate the creation and resolution of the identifiers. Since its launch in 2005, the system has evolved in terms of the structure of the identifiers provided, the software infrastructure, the number of data collections recorded, as well as the scope of the Registry itself. We describe here the new parallel identification scheme and the updated supporting software infrastructure. We also introduce the new Identifiers.org service (http://identifiers.org) that is built upon the information stored in the Registry and which provides directly resolvable identifiers, in the form of Uniform Resource Locators (URLs). The flexibility of the identification scheme and resolving system allows its use in many different fields, where unambiguous and perennial identification of data entities are necessary.
Performance modeling and measurement of parallelized code for distributed shared memory multiprocessors

This paper presents a model to evaluate the performance and overhead of parallelizing sequential code using compiler directives for multiprocessing on distributed shared memory (DSM) systems. We parallelized the sequential implementation of NAS benchmarks using native Fortran77 compiler directives on an Origin2000, which is a DSM system. We report measurement based performance of these parallelized benchmarks from four perspectives: efficacy of parallelization process; scalability; parallelization overhead; and comparison with hand-parallelized and -optimized version of the same benchmarks. Our results indicate that sequential programs can conveniently be parallelized for DSM systems using compiler directives but realizing performance gains as predicted by the performance model depends primarily on minimizing architecture-specific data locality overhead.
Social Web of Things: A Survey

Recently, Wireless Sensor Networks (WSNs) are spread all over the world, and are commonly used to collect physical information from the surrounding world. WSNs play a central role in the Internet of Things (IoT) vision. IoT is a new paradigm that aims to integrate and connect anything at anytime, anyplace, with anything and by anyone. However, addressing objects is the main challenge for IoT. IPv6 over Low power Wireless Personal Area Networks (6LoWPAN) has been introduced to cope with this issue. The emerging paradigm Social web of thing (SWoT) enables users to manage, access, share, and integrate smart objects with Social Network Site (SNS). This paper investigates different SWoT platforms and architectures, provides an overview of the current state-of-the-art on WSN communication standards.
Determining Factors of Subsidiary Development

The literature on subsidiary development has greatly expanded over the last 20 years, evaluating the dynamics behind the evolution of subsidiary roles. The literature emerged out of a critique of the traditional ‘center-periphery’ view where the firm-specific advantages are developed and controlled by the parent company, while the foreign subsidiaries are the long-arm of the parent company in exploiting the firm-specific advantages in the local market. The observation that some subsidiaries have a strategic role in the multinational corporation (MNC) that reaches beyond their local undertakings (e.g. Etemad and Dulude, 1986; Bartlett and Ghoshal, 1989; Gupta and Govindarajan, 1994) was the starting point of research on different subsidiary roles and the evolution of subsidiary roles.
Nexfin Noninvasive Continuous Hemodynamic Monitoring: Validation against Continuous Pulse Contour and Intermittent Transpulmonary Thermodilution Derived Cardiac Output in Critically Ill Patients

Introduction. Nexfin (Bmeye, Amsterdam, Netherlands) is a noninvasive cardiac output (CO) monitor based on finger arterial pulse contour analysis. The aim of this study was to validate Nexfin CO (NexCO) against thermodilution (TDCO) and pulse contour CO (CCO) by PiCCO (Pulsion Medical Systems, Munich, Germany). Patients and Methods. In a mix of critically ill patients (n = 45), NexCO and CCO were measured continuously and recorded at 2-hour intervals during the 8-hour study period. TDCO was measured at 0–4–8 hrs. Results. NexCO showed a moderate to good (significant) correlation with TDCO (R 2 0.68, P < 0.001) and CCO (R 2 0.71, P < 0.001). Bland and Altman analysis comparing NexCO with TDCO revealed a bias (± limits of agreement, LA) of 0.4 ± 2.32 L/min (with 36% error) while analysis comparing NexCO with CCO showed a bias (±LA) of 0.2 ± 2.32 L/min (37% error). NexCO is able to follow changes in TDCO and CCO during the same time interval (level of concordance 89.3% and 81%). Finally, polar plot analysis showed that trending capabilities were acceptable when changes in NexCO (ΔNexCO) were compared to ΔTDCO and ΔCCO (resp., 89% and 88.9% of changes were within the level of 10% limits of agreement). Conclusion. we found a moderate to good correlation between CO measurements obtained with Nexfin and PiCCO.
Consumer video retargeting: context assisted spatial-temporal grid optimization

Pervasive multimedia devices require accurate video retargeting, especially in connected consumer electronics platforms. In this paper, we present a context assisted spatialtemporal grid scheme for consumer video retargeting. First, we parse consumer videos from low-level features to highlevel visual concepts, combining visual attention into a more accurate importance description. Then, a semantic importance map is built up representing the spatial importance and temporal continuity, which is incorporated with a 3D rectilinear grid scaleplate to map frames to the target display, thereby keeping the aspect ratio of semantically salient objects as well as the perceptual coherency. Extensive evaluations were done on two popular video genres, sports and advertisements. The comparison with state-of-the-art approaches on both images and videos have demonstrated the advantages of the proposed approach.
Combined MEG and EEG source imaging by minimization of mutual information

Though very frequently assumed, the necessity to operate a joint processing of simultaneous magnetoencephalography (MEG) and electroencephalography (EEG) recordings for functional brain imaging has never been clearly demonstrated. However, the very last generation of MEG instruments allows the simultaneous recording of brain magnetic fields and electrical potentials on the scalp. But the general fear regarding the fusion between MEG and EEG data is that the drawbacks from one modality will systematically spoil the performances of the other one without any consequent improvement. This is the case for instance for the estimation of deeper or radial sources with MEG. In this paper, the authors propose a method for a cooperative processing of MEG and EEG in a distributed source model. First, the evaluation of the respective performances of each modality for the estimation of every dipole in the source pattern is made using a conditional entropy criterion. Then, the algorithm operates a preprocessing of the MEG and EEG gain matrices which minimizes the mutual information between these two transfer functions, by a selective weighting of the MEG and EEG lead fields. This new combined EEG/MEG modality brings major improvements to the localization of active sources, together with reduced sensitivity to perturbations on data.
Similarity-based distortion of short-term visual memory is perceptual

A task-irrelevant stimulus can distort recall from visual short-term memory. Specifically, the recalled stimulus can take on some of the appearance of an accompanying task-irrelevant stimulus (Huang & Sekuler, 2010a). However, the locus of this robust effect is unknown as it is unclear whether distortion is generated early, during perceptual encoding of target stimuli, or later, during some post-perceptual representation in memory. To select between these two accounts, we manipulated subjects’ attention to target and non-target stimuli whose similarity relationships were varied parametrically. On each trial, subjects were shown one or two Gabor patches, followed by a probe; their task was to indicate whether the probe matched one of the study items. A brief cue told subjects which Gabor, first or second, would serve as that trial’s target item. Critically, this cue appeared either before, between, or after the study items. False alarm rates varied with the probe’s similarity to a trial’s task-irrelevant study item, confirming that the task-irrelevant item impacted visual encoding of the target. A diffusion model (Ratcliff, 1978; Ratcliff & Smith, 2004) was applied simultaneously to subjects’ choice probabilities and reaction times. Model fits revealed that both lure similarity and cue timing affect the model’s mean drift rate parameter, which represents the accumulation of sensory information. This suggests that selective attention in the pre-cue condition operated on the encoding of target stimuli, consistent with a perceptual account of the distortion’s origin. Implications of these results for theories of visual short-term memory are discussed.
Network Traffic Anomaly Detection Based on Self-Similarity Using HHT and Wavelet Transform

Network traffic anomaly detection can be done through the self-similar analysis of network traffic. In this case, the abnormal condition of network can be indicated by investigating if the performance parameters of real time data locate at the acceptable ranges. A common method of estimating self-similar parameter is the Wavelet transform. However, the Wavelet transform fails to exclude the influence of non-stationary signal’s periodicity and trend term. In view of the fact that Hilbert-Huang Transform (HHT) has unique advantage on non-stationary signal treatment, in this paper, a refined self-similar parameter estimation algorithm is designed through the combination of wavelet analysis and Hilbert-Huang Transform and a set of experiments are run to verify the improvement in the accuracy of parameter estimation and network traffic anomaly detection.