Miracle-dz/UniFAR-FTUs huggingface dataset:
Ginzburg‐Landau vortex dynamics driven by an applied boundary current

In this paper we study the time‐dependent Ginzburg‐Landau equations on a smooth, bounded domain Ω ⊂ ℝ2, subject to an electrical current applied on the boundary. The dynamics with an applied current are nondissipative, but via the identification of a special structure in an interaction energy, we are able to derive a precise upper bound for the energy growth. We then turn to the study of the dynamics of the vortices of the solutions in the limit ε → 0. We first consider the original time scale in which the vortices do not move and the solutions undergo a “phase relaxation. ” Then we study an accelerated time scale in which the vortices move according to a derived dynamical law. In the dynamical law, we identify a novel Lorentz force term induced by the applied boundary current. © 2010 Wiley Periodicals, Inc.
Learning morphological phenomena of modern Greek an exploratory approach

Educational technology is influenced by and closely related to the fields of generative epistemology, Artificial Intelligence, and the learning sciences. Relevant research literature refers to the term constructionism (Papert, 1993) and exploratory learning (diSessa et al, 1995). Constructionism and exploratory learning are a synthesis of the constructivist theory of Piaget and the opportunities offered by technology to education on thinking concretely, on learning while constructing intelligible entities, and on interacting with multimedia objects, rather than the direct acquisition of knowledge and facts. These views are based on the approach that learners can take substantial control of their own learning in an appropriately designed physical and cultural environment (Harel, 1991). In parallel, most of the studies of the Vygotskian framework focus on the role of language in the learning procedure, considering conceptual thought to be impossible outside an articulated verbal thinking. Moreover, the specific use of words is considered to be the most relevant cause for childhood and adolescent differentiation (Vygotsky, 1962). DOI: 10.1080/0968776960040305
FlowWalker: A Fast and Precise Off-Line Taint Analysis Framework

This paper presents Flow Walker, a new dynamic taint analysis framework which focuses on eliminating the bottlenecks of the existing tools. The framework proposes a multi-taint-tag assemble level taint propagation strategy. Flow Walker separates taint tracking operations from execution with an off-line structure, uses memory-mapped file to enhance IO efficiency and processes taint paths during execution playback. Based on tainted path information, this paper presents a file format cognition algorithm. According to test data, the average program execution slowdown is less than seven times as original while the speed enhancement is about 15% compared to other cognate tools on Windows, and simple file formats are correctly partitioned with all constant fields extracted. Due to its efficiency and scalability, Flow Walker can be used in further security-related researches.
The pedagogical and linguistic research implications of the GC to on-line parallel and comparable corpora

Monolingual corpora were first thought of as an excellent basis for lexicographical research but, as time went on, research projects extended to various kinds of analysis, from the lexicon, to syntactic patterns to various aspects of text structure. Nowadays the study of the general lexicon covers the analysis of single and multi-word units in context, collocations, lexical groups, lexical 'bundles' (Biber, 2003), and 'priming' (Hoey, 2003). There is also a lot of interest in studying specialized lexicons, observing terminology in context, and the (semi-) automatic extraction of terminology. The pedagogical uses of monolingual corpora tend to be reserved for more sophisticated language study and, despite efforts to promote the use of corpora as an alternative or supplement to the dictionary as a language resource, it is fair to say that use of corpora by the general reading public is still in the future (Maia & Sarmento), 2003).
Experience Sampling as Personal Informatics Tools for Persuasion

In this position paper we propose the use of experience sampling and contextual diary tools as personal information applications to foster attitude and behavior change among individuals. Over the last years a diversity of these tools have been proposed in academics to research user behavior and user experience in-situ. We suggest utilizing these tools to help people collect personal information and trigger desired behavior changes. We present the Maestro approach, a concept to collect context data and study user behavior in realistic environments by using clientserver architecture.
Inequality and Schooling Responses to Globalization Forces: Lessons from History

In the first global century before 1914, trade and especially migration had profound effects on both low-wage, labour abundant Europe and the high-wage, labour scarce New World. Those global forces contributed to a reduction in unskilled labour scarcity in the New World and to a rise in unskilled labour scarcity in Europe. Thus, it contributed to rising inequality in overseas countries, like the United States, and falling inequality in most of Europe. Falling unskilled labour scarcity and rising skill scarcity contributed to the high school revolution in the US. Rising unskilled scarcity also contributed to the primary schooling and literacy revolution in Europe. Under what conditions would we expect the same responses to globalization in today's world? This paper argues that modern debates about inequality and schooling responses to globalization should pay more attention to history.
The correlation between coagulation test and albumin with antithrombin III in Dengue hemorrhagic fever.

AIM To analyse the correlation between coagulation tests (PT APTT fibrinogen, D-dimer) and albumin with AT-II in DHF as well to find the formula to calculate AT-III with the parameter of coagulation tests and albumin. METHODS A descriptive-correlative cross sectional study was conducted to 49 patients with DHF consisted of DHF I(17), DHF (19), DHF III (6) and DHF IV (7). The diagnosis of DHF is based on WHO criteria 1997. The laboratory examinations were coagulation tests (PT, APT, fibrinogen and D-dimer), antithrombin III and albumin, performed when the fever subside and the platelets reached the lowest count(4(th) - 6(th) day). RESULTS A significant correlation was found between PT and AT-III (r= -0.631; p=0.000), between D-dimer and AT-III (r= -0.337; p=0.021) and between albumin and AT-III (r= 0.291; p-0.045). In multiple linier regression analysis(backward), AT-III can be calculated with the formula, accuracy 68.3%. CONCLUSIONS PT and D-dimer were correlated negatively with AT-III, however albumin was correlated positively with AT-III. PT, D-dimer and AT-III were correlated with the grading severity of the DHF. In this study, AT-III can be calculated with the formula, accuracy 68.3%.
SQLi penetration testing of financial Web applications: Investigation of Bangladesh region

Business critical web applications are the most popular services provided to the client by the financial sector. These applications are bringing handsome revenue for the financial industry every year. These services are also a frequent target of attackers. Poor coding practice leads applications to vulnerability that are exploited by attackers. Information and privileges such as access to databases, admin authorization, and access to data could be retrieved through exploitation. Services provided through web applications make the exploitation easier as these could be accessed from anywhere around the world. Web based financial services are comparatively new concept in Bangladesh. Thus the security aspects of these applications are less explored. This paper represents an analysis of few basic security issues of the financial web applications of Bangladesh. It focuses on structured query language injection (SQLi) vulnerability. It presents a manual black box penetration testing approach to test the financial web applications. Same steps are used for testing all the web applications in the dataset. A vulnerability analysis of the findings collected during the penetration testing is also presented in the paper.
SUPERMARKET CHOICE AND SUPERMARKET COMPETITION IN MARKET EQUILIBRIUM

Multi-store firms are common in the retailing industry. Theory suggests that cross-elasticities between stores of the same firm enhance market power. To evaluate the importance of this effect in the U.K. supermarket industry, we estimate a model of consumer choice and expenditure using three data sources: profit margins for each chain, a survey of consumer choices and a data-set of store characteristics. To permit plausible substitution patterns, the utility model interacts consumer and store characteristics. We measure market power by calculating the effect of merger and demerger on Nash equilibrium prices. Demerger reduces the prices of the largest firms by between 2 and 3.8% depending on local concentration; mergers between the largest firms lead to price increases up to 7.4%. Copyright 2004, Wiley-Blackwell.
Fully Distributed Authority-Based Key Management for Mobile Ad Hoc Networks

Securing wireless mobile ad hoc networks (MANETs) is challenging due to the lack of centralized authority and poor connectivity. Key management forms the basis for achieving many security objectives such as protecting routing protocols and private communications. We propose a novel key management scheme for MANETs that exploits mobility and the routing infrastructure to effectively manage security associations. Keying material propagates along virtual chains via a message relaying mechanism. We show that the proposed scheme results in a key management with low implementation complexity, ideally suited for stationary ad hoc networks and MANETs with low to high mobility. The proposed scheme uses mobility as an aid to fuel the rate of bootstrapping the routing security, but in contrast to existing schemes does not become dependent on mobility. The key dissemination occurs completely on-demand; security associations are only established, renewed or revoked as needed by the routing protocol and intrusion detection system. We show through simulations that the scheme‘s communication and computational overhead has negligible impact on network performance. Index Terms Mobile ad hoc networks, security, peer-to-peer key management, pairwise key management, authority based key management, network level key distribution, subordinate public keys
Mutiphysics study of RF/microwave planar devices: Effect of the input signal power

In this paper, the effects of the input signal power on microwave planar devices are studied in detail. In this context, a complete multiphysics study is performed, involving the electro-thermo-mechanical coupling in microwave components. For this study, a multiphysics simulator is used. As shown, for moderate input powers, the device transfer function can be altered, mainly in terms of an increase of losses and a frequency shift. Additionally, hot spots are to be appeared, whose location is related to the electromagnetic field distribution of the passive device under test. Guidelines are also provided to estimate the average power handling capability (APHC) of planar components. As an example, the multiphysics analysis of a microstrip coupled-line filter centered at 42 GHz is tackled taken into account different thermal and mechanical boundary conditions.
iscovery of E tion of Convergence

Systems that discover empirical equations from data require large scale testing to become a reliable research tool. In the central part of this paper we discuss two convergence tests for large scale evaluation of equation finders and we demonstrate that our system, which we introduce earlier, has the desired convergence properties. Our system can detect a broad range of equations useful in different sciences, and can be easily expanded by addition of new variable transformations. Previous systems, such as BACON or ABACUS, disregarded or oversimplified the problems of error analysis and error propagation, leading to paradoxical results and impeding the true world applications. Our system treats experimental error in a systematic and statistically sound manner. It propagates error to the transformed variables and assigns error to parameters in equations. It uses errors in weighted least squares fitting, in the evaluation of equations, including their acceptance, rejection and ranking, and uses parameter error to eliminate spurious parameters. The system detects equivalent terms (variables) and equations, and it removes the repetitions. This is important for convergence tests and system efficiency. Thanks to the modular structure, our system can be easily expanded, modified, and used to simulate other equation finders.
Asymptotic behaviour of commutation errors and the divergence of the Reynolds stress tensor near the wall in the turbulent channel flow

The derivation of the space averaged Navier–Stokes equations for the large eddy simulation (LES) of turbulent incompressible flows introduces two groups of terms which do not depend only on the space averaged flow field variables: the divergence of the Reynolds stress tensor and commutation errors. Whereas the former is studied intensively in the literature, the latter terms are usually neglected. This note studies the asymptotic behaviour of these terms for the turbulent channel flow at a wall in the case that the commutation errors arise from the application of a non‐uniform box filter. To perform analytical calculations, the unknown flow field is modelled by a wall law (Reichardt law and 1/αth power law) for the mean velocity profile and highly oscillating functions model the turbulent fluctuations. The asymptotics show that near the wall, the commutation errors are at least as important as the divergence of the Reynolds stress tensor. Copyright © 2006 John Wiley & Sons, Ltd.
Structural and functional basis of transcriptional regulation by TetR family protein CprB from S. coelicolor A3(2)

Antibiotic production and resistance pathways in Streptomyces are dictated by the interplay of transcriptional regulatory proteins that trigger downstream responses via binding to small diffusible molecules. To decipher the mode of DNA binding and the associated allosteric mechanism in the sub-class of transcription factors that are induced by γ-butyrolactones, we present the crystal structure of CprB in complex with the consensus DNA element to a resolution of 3.25 Å. Binding of the DNA results in the restructuring of the dimeric interface of CprB, inducing a pendulum-like motion of the helix-turn-helix motif that inserts into the major groove. The crystal structure revealed that, CprB is bound to DNA as a dimer of dimers with the mode of binding being analogous to the broad spectrum multidrug transporter protein QacR from the antibiotic resistant strain Staphylococcus aureus. It was demonstrated that the CprB displays a cooperative mode of DNA binding, following a clamp and click model. Experiments performed on a subset of DNA sequences from Streptomyces coelicolor A3(2) suggest that CprB is most likely a pleiotropic regulator. Apart from serving as an autoregulator, it is potentially a part of a network of proteins that modulates the γ-butyrolactone synthesis and antibiotic regulation pathways in S. coelicolor A3(2).
Algorithms for Max-Min Share Fair Allocation of Indivisible Chores

We consider Max-min Share (MmS) fair allocations of indivisible chores (items with negative utilities). We show that allocation of chores and classical allocation of goods (items with positive utilities) have some fundamental connections but also differences which prevent a straightforward application of algorithms for goods in the chores setting and vice-versa. We prove that an MmS allocation does not need to exist for chores and computing an MmS allocation - if it exists - is strongly NP-hard. In view of these non-existence and complexity results, we present a polynomial-time 2-approximation algorithm for MmS fairness for chores. We then introduce a new fairness concept called optimal MmS that represents the best possible allocation in terms of MmS that is guaranteed to exist. We use connections to parallel machine scheduling to give (1) a polynomial-time approximation scheme for computing an optimal MmS allocation when the number of agents is fixed and (2) an effective and efficient heuristic with an ex-post worst-case analysis.
Project management in plan-based and agile companies

Agile methods are a recent set of development techniques that apply a human-centered approach to software production. The agile approach aims to deliver high-quality products faster, producing satisfied customers. We conducted an empirical study to investigate whether agile methods change and improve project management practices in software companies. Survey results show that adopting agile methods appears to improve management of the development process and customer relationships. This article has given a first analysis of the advantages and disadvantages of adopting agile methods from a project management perspective.
Grenzenlose Enthüllungen? Medien zwischen Öffnung und Schließung

Empfohlene Zitierung / Suggested Citation: Rußmann, Uta; Beinsteiner, Andreas; Ortner, Heike; Hug, Theo: Grenzenlose Enthüllungen? Medien zwischen Öffnung und Schließung. Zur Einführung. In: Uta Rußmann, Andreas Beinsteiner, Heike Ortner (Hg.): Grenzenlose Enthüllungen. Medien zwischen Öffnung und Schließung. Innsbruck: Innsbruck University Press 2012 (Medien – Wissen – Bildung), S. 7–15. DOI: https://doi.org/10.25969/mediarep/1688.
Roles of MicroRNA across Prenatal and Postnatal Periods

Communication between mother and offspring in mammals starts at implantation via the maternal–placental–fetal axis, and continues postpartum via milk targeted to the intestinal mucosa. MicroRNAs (miRNAs), short, noncoding single-stranded RNAs, of about 22 nucleotides in length, are actively involved in many developmental and physiological processes. Here we highlight the role of miRNA in the dynamic signaling that guides infant development, starting from implantation of conceptus and persisting through the prenatal and postnatal periods. miRNAs in body fluids, particularly in amniotic fluid, umbilical cord blood, and breast milk may offer new opportunities to investigate physiological and/or pathological molecular mechanisms that portend to open novel research avenues for the identification of noninvasive biomarkers.
Measuring the Value of a Statistical Life: Problems and Prospects

Tradeoffs between monetary wealth and fatal safety risks are summarized in the value of a statistical life (VSL), a measure that is widely used for the evaluation of public policies in medicine, the environment, and transportation safety. This paper demonstrates the widespread use of this concept and summarizes the major issues, both theoretical and empirical, that must be confronted in order to provide a credible estimate of a VSL. The paper concludes with an application of these issues to a particular study of speed limits and highway safety.
Instantaneous Proxy-Based Key Update for CP-ABE

Attribute Based Encryption (ABE) scheme has been proposed to implement cryptographic fine grained access control to shared information. It allows to share information of type one-to-many users, without considering the number of users and their identities. However, original ABE systems suffer from the non-efficiency of their attribute revocation mechanisms. Based on Ciphertext-Policy ABE (CP-ABE) scheme, we propose an efficient proxy-based immediate private key update which does require neither re-encrypting ciphertexts, nor affect other users' secret keys. The semi-trusted proxy assists nodes during the decryption process without having ability to decrypt users' data. Finally, we analyze the security of our scheme and demonstrate that the proposed solution outperforms existing ones in terms of generated overheard.
Strong observational constraints on advection-dominated accretion in the cores of elliptical galaxies

ABSTRA C T The growing evidence for supermassive black holes in the centres of relatively nearby galaxies has brought into sharper focus the question of why elliptical galaxies, rich in hot gas, do not possess quasar-like luminosities. Recent studies suggest that the presence of advectiondominated accretion flows (ADAFs), with their associated low radiative efficiency, might provide a very promising explanation for the observed quiescence of these systems. Although ADAF models have been applied to a number of low-luminosity systems, compelling observational evidence for their existence is still required. Here, we examine new highfrequency radio observations of the three giant, low-luminosity elliptical galaxies NGC 4649, NGC 4472 and NGC 4636 obtained using the Very Large Array (VLA) and the Submillimetre Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope (JCMT). At these frequencies the predictions are very precise and an ADAF is unequivocally characterized by a slowly rising spectrum with a sharp spectral cut-off produced by thermal synchrotron radiation. Although X-ray analysis of these galaxy cores provides very strong clues for their extreme quiescence (and makes the case of advective accretion plausible), the new radio limits disagree severely with the canonical ADAF predictions which significantly overestimate the observed flux. While the present observations do not rule out the presence of an ADAF in the systems considered here, they do place strong constraints on the model. If the accretion in these objects occurs in an advection-dominated mode, then our radio limits imply that the emission from their central regions must be suppressed. We examine the possibility that the magnetic field in the flow is extremely low, or that synchrotron emission is free‐free absorbed by cold material in the accretion flow. We also discuss whether slow non-radiating accretion flows may drive winds/outflows to remove energy, angular momentum and mass so that the central densities, pressures and emissivities are much smaller than in a standard ADAF.
Comparative Analysis of International Stock Market Volatility with ARCH Model

In stock markets, the price is fluctuating around its average value with the time being. One of the volatilities is the variance heteroscedasticity. It is found that auto-regressive conditional heteroscedasticity (ARCH) model provides an alternative approach for the simulation of stock heteroscedasticity. In this paper, the application of ARCH and its modified models is presented for the risk analysis based on the stock index of America, Europe, China and other countries in Asia Pacific. GARCH-M model is used to test the long-term volatility self-similarity and the correlation between risk and return; TGARCH model is introduced to test the volatility leverage effect; EGARCH model is applied to verify the asymmetry heteroscedasticity of stock price fluctuation.
The Roots of Trust: Cognition Beyond Rational

Trust is not simply the result of rational cognition but relies on rational and "beyond rational" cognition. The concept of trust is discussed in terms of its biological, Maslow, and cognitive roots. The cognitive roots rely on the Dual Process Theory, i.e. that there are two types of cognition sometimes called rational and non-rational. Therefore, the roots of trust need a cognitive architecture that implements the Dual Process Theory and involves cognition both rational and beyond rational.