Miracle-dz/UniFAR-FTUs huggingface dataset:
Query-log mining for detecting spam

Every day millions of users search for information on the web via search engines, and provide implicit feedback to the results shown for their queries by clicking or not onto them. This feedback is encoded in the form of a query log that consists of a sequence of search actions, one per user query, each describing the following information: (i) terms composing a query, (ii) documents returned by the search engine, (iii) documents that have been clicked, (iv) the rank of those documents in the list of results, (v) date and time of the search action/click, (vi) an anonymous identifier for each session, and more. In this work, we investigate the idea of characterizing the documents and the queries belonging to a given query log with the goal of improving algorithms for detecting spam, both at the document level and at the query level.
Integrating Process and Work Breakdown Structure with Design Structure Matrix

∗Department of Computer Science and Information Engineering, National Central University, Jhongli, Taiwan E-mail: {yjlee, jass, wtlee, jielee}@selab.csie. ncu.edu.tw ∗∗Department of Computer and Information Science, National Taichung University, Taichung, Taiwan E-mail: glenn@mail.ntcu. edu.tw ∗∗∗Department of Computer Science and Engineering, National Taiwan Ocean University, Keelung, Taiwan E-mail: albert@mail.ntou. edu.tw
Design of interleaved sequences for joint channel estimation and PAPR reduction

In a series of previous related works, a joint Channel Estimation and Peak-to-Average Power Ratio (PAPR) (CEPR) based on shifted and superimposed sequences (FS-CEPR) for Orthogonal Frequency Division Multiplexing (OFDM) has been addressed by some authors of this paper. While the FS-CEPR techniques have proven its efficiency in terms of PAPR reduction, the channel estimation requires an additional processing at the receiver side. In this paper, we propose a novel implementation algorithm of the sequences. Instead of superimposing them, we propose to implement an interleaving process which allows a simple PAPR reduction technique, but also, a simple channel estimation scheme. To realize this target, we propose to uniformly distribute the sequences chips over the whole spectrum (i.e. over the set of subcarriers at the input of Inverse Fast Fourier Transform IFFT) and to apply, as for the CEPR technique, a multiplicative law between the chips of these sequences. To reduce multiple peaks, different sequences will be interleaved at the input of the IFFT. Finally, we show that the fast interleaved-CEPR technique (FI-CEPR) is efficient in terms of PAPR reduction value and channel estimation.
Straight Talk -- Rethinking capital controls: When should we keep an open mind?

As a relatively new arrival to the IMF, I cannot bear firsthand witness to who said what, when, during the buildup to the 1990s Asian debt crisis. Was the IMF as guilty of ramming accelerated capital account liberalization down countries' throats as is sometimes alleged? A wide polling of "old-timers" yields mixed results. Overall, my sense is that whereas certain antiglobalization polemics grossly overstate the charge, it still has some currency. At the very least, in some of its routine surveillance missions during the early to mid-1990s and in some of its technical assistance advice, the IMF was not forceful enough when it warned countries with weak financial systems and inadequate macroeconomic frameworks that they were opening up to short-term borrowing from abroad too quickly.
2 1 Fe b 20 08 Pumping angular momentum by driven chaotic scattering

Chaotic scattering with an internal degree of freedom and the possibility to generate directed transport of angular momentum in such a system is studied in a specific model, a magnetic dipole moving in periodically modulated magnetic field confined to a compact region in space. We show that this system is an irregular scatterer in large parts of its parameter space. If in addition all spatio-temporal symmetries are broken, directed transport of mass as well as angular momentum occurs. The sensitive parameter dependence of the corresponding currents includes frequent sign reversals. Zeros of either current quantity correspond to the exclusive occurrence of the other and thus give rise in particular to angular-momentum separation without mass transport as a classical analogue of spin-polarized currents. Chaotic angular-momentum pump 2
Macroeconomic effects of financial stress and the role of monetary policy: a VAR analysis for the euro area

This paper analyses an otherwise standard macro-financial VAR model for the euro area that includes - apart from conventional measures of output, inflation and monetary policy - a composite indicator of systemic financial stress, namely the CISS index, and total assets of the ECB balance sheet capturing the stance of unconventional monetary policy. I find that the CISS contributes significantly to the dynamics of the macroeconomy and exerts a strong influence on monetary policy when looking at both policy rates and the ECB balance sheet. The significance of the CISS appears robust to the inclusion of a broad set of real and financial control variables. Based on tests of direct versus indirect (Granger-)causality patterns proposed in Hsiao (1982), I also find that unlike unconventional policy as measured by ECB balance sheet growth, the policy rate does not seem to react directly to variations in financial stress but rather indirectly through the impact of financial stress on macroeconomic conditions. These different patterns of reaction are broadly consistent with the ECB’s “separation principle”. The estimated effects of the ECB’s standard and non-standard policy measures on inflation and economic growth are moderate, although an easier stance in both policy tools helps calm down financial stress.
SYNERGY AMONG LYMPHOID CELLS MEDIATING THE GRAFT-VERSUS-HOST RESPONSE

The capacity of cells from different lymphoid tissues obtained from Balb/c mice to produce graft-vs.-host (GVH) reactions was quantitatively determined in C57BL/6N by Balb/c F1 hybrid recipients. Synergistic responses were observed when small numbers of cells from lymphoid tissues that were rich in GVH activity such as spleen and femoral lymph node were combined with weakly reactive thymus cells. Thymus and spleen cells obtained from 1-wk old mice were separately inactive but produced moderate GVH reactions when combined in equal proportions. GVH activity of spleen cells from mice thymectomized at 3 days of age was partially restored by the addition of small numbers of spleen or thymus cells from adult mice. Changes in ratio between the two cell populations markedly affected the degree of synergy. Synergy was not observed when Balb/c cells were combined with Balb/c x C57BL/6N F1 hybrid cells and inoculated into C57BL/6N recipients, but was demonstrated when Balb/c and C57BL/6N cells were combined and inoculated into F1 recipients, indicating that a genetic disposition to mount GVH reactions in both populations is required to produce synergy. The data indicate that at least two cell types are necessary for GVH reactions, and that synergy between cell populations results from favorable adjustments in the ratio between these two cell types.
Transducer composition for context-dependent network expansion

Context-dependent models for language units are essential in high-accuracy speech recognition. However, standard speech recognition frameworks are based on the substitution of lowerlevel models for higher-level units. Since substitution cannot express context-dependency constraints, actual recognizers use restrictive model-structure assumptions and specialized code for context-dependent models, leading to decreased flexibility and lost opportunities for automatic model optimization. Instead, we propose a recognition framework that builds in the possibility of context dependency from the start by using weighted finite-state transduction rather than substitution. The framework is implemented with a general demand-driven transducer composition algorithm that allows great flexibility in model structure, form of context dependency and network expansion method, while achieving competitive recognition performance.
Modeling of Microdevices for SAW-Based Acoustophoresis—A Study of Boundary Conditions

We present a finite-element method modeling of acoustophoretic devices consisting of a single, long, straight, water-filled microchannel surrounded by an elastic wall of either borosilicate glass (pyrex) or the elastomer polydimethylsiloxane (PDMS) and placed on top of a piezoelectric transducer that actuates the device by surface acoustic waves (SAW). We compare the resulting acoustic fields in these full solid-fluid models with those obtained in reduced fluid models comprising of only a water domain with simplified, approximate boundary conditions representing the surrounding solids. The reduced models are found to only approximate the acoustically hard pyrex systems to a limited degree for large wall thicknesses and but not very well for acoustically soft PDMS systems shorter than the PDMS damping length of 3 mm.
Global anti-synchronization of memristor-based recurrent neural networks with time-varying delays and impulsive effects

In this paper, the anti-synchronization control of memristor-based recurrent neural networks with impulsive perturbations is studied. By using differential inclusions theory, the Lyapnov functional method and the inequality technique, some sufficient conditions are derived to ensure impulsive exponential anti-synchronization of memristor-based recurrent neural networks. The new proposed results involve the impulsive effects and improve the earlier publications. Numerical examples are given to show the effectiveness of our new schemes.
Potential of Drug Interactions among Hospitalized Cancer Patients in a Developing Country

Cancer patients are more susceptible to adverse drug-drug interactions (DDIs) due to receiving multiple medications especially chemotherapy medications, hormonal agents and supportive care drugs. The aim of this study is to describe the prevalence of potential DDIs and to identify risk factors for these potential interactions in hospitalized cancer patients in a developing country. A cross-sectional study conducted by reviewing charts of 224 consecutive in hospitalized patients in hematology-oncology ward of a teaching hospital in Tehran, during a 12 month period from July 2009 to July 2010. “Drug Interaction Facts 2008, 2009: The Authority on Drug Interactions” was used for screening the potential drug-drug interactions. Potential interactions were classified by levels of severity and documentation. The median age of patients was 50 years, the length of hospital stay for patient was 5 days and the number of drugs per patient was 8 drugs. Two hundred and twenty-eight potential interactions were detected. Nearly 14% of the interactions were major and 60% were moderate. Approximately 9% and 10% potential interactions were graded as established and probable. In multivariate analysis, being older than 61 years old, suffering from hematologic cancer, source of cancer in different specific organs (esophagus, testis and cervices more than other sources), and number of ordered drugs for patients were independent predictors of having at least one potential DDI in hospital order. Suffering from hematologic cancer, source of cancer in different organs, length of hospital stay and number of ordered drugs for patients were independent predictors for number of interactions per patients. Having a DDI seems to be more likely to occur in patients older than 61 years old. Hematologic cancers, having more medications in physician’s order, longer length of hospital stay, esophageal cancer, testicular cancer and cervical cancer have related to having a DDI and also having more number of interactions.
Light-dependent changes in outer retinal water diffusion in rats in vivo

Purpose To test the hypothesis that in rats, intraretinal light-dependent changes on diffusion-weighted magnetic resonance imaging (MRI) in vivo are consistent with known retinal layer-specific physiology. Methods In male Sprague-Dawley rats, retinal morphology (thickness, extent, surface area, volume) and intraretinal profiles of the apparent diffusion coefficient (ADC, i.e., water mobility) parallel and perpendicular to the optic nerve were measured in vivo using quantitative MRI methods during light and dark stimulation. Results The parallel ADC in the posterior half of the avascular, photoreceptor-dominated outer retina was significantly higher in light than dark, and this pattern was reversed (dark>light) in the anterior outer retina. The perpendicular ADC in the posterior outer retina was similar in light and dark, but was significantly higher in dark than light in the anterior outer retina. No light-dark changes in the inner retina were noted. Conclusions We identified light-dependent intraretinal diffusion changes that reflected established stimulation-based changes in outer retinal hydration. These findings are expected to motivate future applications of functional diffusion-based MRI in blinding disorders of the outer retina.
Effect of Instruction Fetch and Memory Scheduling on GPU Performance

GPUs are massively multithreaded architectures designed to exploit data level parallelism in applications. Instruction fetch and memory system are two key components in the design of a GPU. In this paper we study the effect of fetch policy and memory system on the performance of a GPU kernel. We vary the fetch and memory scheduling policies and analyze the performance of GPU kernels. As part of our analysis we categorize applications as symmetric and asymmetric based on the instruction lengths of warps. Our analysis shows that for symmetric applications, fairness based fetch and DRAM policies can improve performance. However, asymmetric applications require more sophisticated policies.
Design and Simulation for Path Tracking Control of a Commercial Vehicle Using MPC

The design of the robotic vehicle VILMA at UNICAMP is developed in-vehicle platform Fiat Punto. In addition to a set of sensors, actuators, mechanism and components (hardware and/or software), new technologies should be developed in support of Automation, Control, Perception, Localization and Navigation. This work presents the design and simulation of path tracking control using model predictive control (MPC) which attempts to exploit the characteristics of the structured environment where the future path is previously known. The model for design the controller is based in a single tracking model of the vehicle and in a model of the steering which the state variables are observed by the Extended Kalman Filter (EKF). Finally, it is explained how the path is smoothed generating an arc between the points and making an optimization process by the gradient algorithm.
Detection of the Angular Correlation of Faint X-Ray Sources

We have analyzed a set of deep ROSAT observations with a total sky coverage of 40 deg2 to search for clustering of faint X-ray sources. Using the resulting catalog of discrete X-ray sources, we detect, for the first time in the X-ray band, a positive correlation on angular scales of 0. ′5-10'. When corrected for a bias due to limited spatial resolution, which amplifies the correlation, the observed angular correlation function agrees well with that expected from the spatial correlation of optically selected quasars provided that they comprise an appreciable fraction (≥50%) of detected X-ray sources.
Magicsphere: an insight tool for 3D data visualization

How to render very complex datasets, and yet maintain interactive response times, is a hot topic in computer graphics. The MagicSphere idea originated as a solution to this problem, but its potential goes much further than this original scope. In fact, it has been designed as a very generical 3D widget: it defines a spherical volume of interest in the dataset modeling space. Then, several filters can be associated with the Magicsphere, which apply different visualization modalities to the data contained in the volume of interest. The visualization of multi‐resolution datasets is selected here as a case study and an ad hoc filter has been designed, the MultiRes filter. Some results of a prototipal implementation are presented and discussed.
Validation and comparative evaluation of the osteoporosis self-assessment tool (OST) in a Caucasian population from Belgium.

BACKGROUND Risk indices have been developed to identify women at risk of low bone mineral density (BMD) who should undergo BMD testing. AIM To compare the performance of four risk indices in White ambulatory women in Belgium. DESIGN Epidemiological cross-sectional study. METHODS Records were analysed for 4035 postmenopausal White women without Paget's disease or advanced osteoarthritis, seen at an out-patient osteoporosis centre between January 1996 and September 1999. Osteoporosis risk index scores were compared to bone density T-scores. The ability of each risk index to identify women with low BMD (T-score < -2.0) or osteoporosis (T < -2.5) was evaluated. RESULTS Using an Osteoporosis Self-Assessment Tool (OST) score <2 to recommend DXA referral, sensitivity ranged from 85% at the lumbar spine to 97% at the total hip to detect BMD T-scores of <or= -2.5, and specificity ranged from 34% at the total hip to 37% at the femoral neck and lumbar spine. The negative predictive value was high at all skeletal sites (89-99%), demonstrating the usefulness of the OST to identify patients who have normal BMD and should not receive DXA testing. All risk indices performed similarly, although the OST had somewhat better sensitivity and somewhat lower specificity than the other indices at the cut-offs evaluated. Among the 11-12% of women who were classified as highest risk using OST or the Osteoporosis Index of Risk (OSIRIS), 81-85% had low bone mass and 68-74% had osteoporosis. DISCUSSION The performance of these risk indices among women in Belgium was similar to that reported earlier for other samples in Asian countries, the US, and the Netherlands. The OST and other risk indices are effective and efficient tools to help target high-risk women for DXA testing.
Chapter # Reconciling Control and Discourse Structure

In this paper we consider how control (initiative) is managed in taskoriented dialogues. We propose that control is subordinate to discourse structure. The initiator of a discourse structure segment has control for the entire segment, except occasionally when the non-initiator takes control briefly, then control generally reverts immediately back to the segment initiator, or a new block begins. In analyzing dialogues from the TRAINS corpus we find that inside a segment initiated by one speaker, the other speaker only makes two types of contributions: collaborative completions, in which the non-initiator helps the segment initiator achieve their goal of completing an utterance, and short contributions to the discourse segment purpose. The proposal has important implications for dialogue management: a system only needs to model intentional structure, from which control follows.
Automatic Data Layout and Code Restructuring for Out-of-core Programs Jean-Fran

Execution of Out-of-Core programs takes hours or even tens of hours when they rely on the virtual memory system. This paper introduces a framework and an algorithm that nd an optimal array layout, group accesses to identical disk blocks, and insert explicit I/Os before and after \atomic" sequences of computation. Target architectures are restricted to computers with one processor and one disk. Our algorithm is applied on kernels taken from real scientiic codes. We report speed-ups of more than one hundred. 1 Introduction For scientiic applications involving very large data sets, the performance bottleneck does not lie anymore in the relative speeds of cache and memory, nor, in the case of parallel computing, in inter-processor communication, but in I/Os to disk. The reason is that the so-called out-of-core (OOC) data do not t in main \core" memory and, therefore, have to be ushed to and fetched back from disk(s) whose access time is considerably slower than access to main memory, and tremendously slower than processor speed. For such applications, execution takes hours, if not tens of hours. Indeed, it is well known that relying on the virtual memory system is a bad solution for OOC computing. On the contrary, writing explicit I/O and/or changing the layout of data on disk leads to very high increase in performance. The purpose of this paper is to propose a framework for automatic handling of large data sets, including code restructuring , insertion of explicit I/O calls and data layout. This framework makes very few assumptions on programs (e.g., any array subscript is accepted, loops may be imperfectly nested, etc) and is applied on several kernels taken from \real-life" codes. In OOC programs, data les are of two kinds: they are either input or output data that are pre-or post-processed by a separate application, or they are temporary data used for intermediate results or check-pointing. This is a significant diierence: Whereas some arrays have xed layouts imposed by the environment (the input/output data), oth
The Web of Words

% dictionary is more than a book of defini /' x% tions; it is an index to a language, impos J k ing an order on our inventory of words. Likewise a thesaurus is a table of contents, which takes the same stock of words but organizes them thematically rather than alphabetically. Both kinds of books reveal something about the underlying structure of the lexicon (the set of all words that make up a language). That structure is what mathematicians call a graph? a collec tion of "nodes" connected by "edges," usually drawn as a web of dots and lines. When a language is viewed as a mathematical graph, the nodes are words (or sets of words), and the edges are relations between them. Any dictionary will help you to walk from node to node through the graph. For example, in defin ing the word elegant, the American Heritage Dic tionary offers delicate as a synonym; on looking up delicate, you find dainty among the meanings listed; dainty in turn leads you to the entry for ex quisite; and among the meanings of exquisite is el egant again. In this way you trace out one of many loops, or cycles, within the graph defined by this particular dictionary. Exploring small regions of a lexical graph is a fa miliar process; you do it mentally whenever you grope for the right word. But trying to construct a graph for an entire language is another matter en tirely. English has well over 100,000 words, and they are related to one another in dozens or per haps hundreds of ways. Finding and recording all the connections is a task on the same scale as com