Miracle-dz/UniFAR-FTUs huggingface dataset:
Fair benchmark for image watermarking systems

Since the early 90s a number of papers on 'robust' digital watermarking systems have been presented but none of them uses the same robustness criteria. This is not practical at all for comparison and slows down progress in this area. To address this issue, we present an evaluation procedure of image watermarking systems. First we identify all necessary parameters for proper benchmarking and investigate how to quantitatively describe the image degradation introduced by the watermarking process. For this, we show the weaknesses of usual image quality measures in the context watermarking and propose a novel measure adapted to the human visual system. Then we show how to efficiently evaluate the watermark performance in such a way that fair comparisons between different methods are possible. The usefulness of three graphs: 'attack vs. visual-quality,' 'bit-error vs. visual quality,' and 'bit-error vs. attack' are investigated. In addition the receiver operating characteristic (ROC) graphs are reviewed and proposed to describe statistical detection behavior of watermarking methods. Finally we review a number of attacks that any system should survive to be really useful and propose a benchmark and a set of different suitable images.
Effect of measurement conditions on measured levels of peak exhaled nitric oxide.

BACKGROUND: It is possible to measure nitric oxide (NO) levels in exhaled air. The absolute concentrations of exhaled NO obtained by separate workers in similar patient groups and normal subjects with apparently similar techniques have been very different. A study was undertaken to determine whether changes in measurement conditions alter the concentration of exhaled NO. METHOD: NO concentrations measured by a chemiluminescence analyser (Dasibi Environmental Corporation) and carbon dioxide (CO2) measured by a Morgan capnograph were analysed in single exhalations from total lung capacity in healthy volunteers (mean age 35.9 years). Ten subjects performed five exhalations at four different expiratory flow rates, at four different expiratory mouth pressures, and before and after drinking hot (n = 5) or cold (n = 5) water. Three subjects performed five exhalations on a day of high background NO (mean NO level 134 ppb) before and after a set of five exhalations made while both the subject and analysers were sampling from a low NO/NO-free reservoir system. RESULTS: The mean peak concentration of NO decreased by 35 ppb (95% CI 25.7 to 43.4) from a mean (SE) of 79.0 (15.5) ppb at an expiratory flow rate of 250 ml/min to 54.1 (10.7) ppb at 1100 ml/min. The mean peak concentration of NO did not change significantly with change in mouth pressure. The mean (SE) peak NO concentration decreased from 94.4 (20.8) ppb to 70.8 (16.5) ppb (p = 0.002, 95% CI 12.9 to 33.1) with water consumption. The mean NO concentration with machine and subject sampling from the low NO reservoir was 123.1 (19.4) ppb, an increase from results obtained before (81.9 (10.2) ppb, p = 0.001, 95% CI -19.9 to -62.7) and after (94.2 (18.3) ppb, p = 0.017, 95% CI 6.0 to 51.8) sampling with high ambient NO. CONCLUSIONS: The measurement of exhaled NO must be performed in a carefully standardised manner to enable different teams of investigators to compare results.
Exploiting variable physical damping in rapid movement tasks

Until now, design of variable physical impedance actuators (VIAs) has been limited mainly to realising variable stiffness while other components of impedance shaping, such as damping, are either fixed (e.g., with the addition of fixed passive dampers) or modulated with active feedback control schemes. In this work we introduce an actuator that is capable of simultaneous and independent physical damping and stiffness modulation. Using optimal control techniques, we explore how variable physical damping can be exploited in such an actuator in the context of rapid movement. Several numerical simulation results are presented, in addition to an experiment realised on variable impedance robotic hardware.
CHAPTER 1 INTRODUCTION TO THE HILBERT HUANG TRANSFORM AND ITS

The Hilbert–Huang transform (HHT) is an empirically based data-analysis method. Its basis of expansion is adaptive, so that it can produce physically meaningful representations of data from nonlinear and non-stationary processes. The advantage of being adaptive has a price: the difficulty of laying a firm theoretical foundation. This chapter is an introduction to the basic method, which is followed by brief descriptions of the recent developments relating to the normalized Hilbert transform, a confidence limit for the Hilbert spectrum, and a statistical significance test for the intrinsic mode function (IMF). The mathematical problems associated with the HHT are then discussed. These problems include (i) the general method of adaptive data-analysis, (ii) the identification methods of nonlinear systems, (iii) the prediction problems in nonstationary processes, which is intimately related to the end effects in the empirical mode decomposition (EMD), (iv) the spline problems, which center on finding the best spline implementation for the HHT, the convergence of EMD, and two-dimensional EMD, (v) the optimization problem or the best IMF selection and the uniqueness of the EMD decomposition, (vi) the approximation problems involving the fidelity of the Hilbert transform and the true quadrature of the data, and (vii) a list of miscellaneous mathematical questions concerning the HHT.
The Relation between Helicobacter pylori Infection and Acute Bacterial Diarrhea in Children

Background. H. pylori infection leads to chronic gastritis in both children and adults. But recently, there are arising theories of its protective effect in diarrheal diseases. Aim. To explore the prevalence of H. pylori infection in children with bacterial diarrhea and compare it with healthy controls. Patients and Methods. Two matched groups consisted of 122 consecutive children, aged 24–72 months old, with acute bacterial diarrhea, who had Shigellosis (N = 68) and Salmonellosis (N = 54) as patients group and 204 healthy asymptomatic children as control group enrolled in this study. Results. The prevalence of H. pylori infection in healthy control children was significantly higher than in patients group, (odds ratio = 3.6, 95% CI: 1.33–9.5, P = 0.007). In our study, only 2/54 Salmonella infected patients and 3/68 of Shigellosis had evidence of H. pylori infection, while normal control children had 27/204 infected individuals. Conclusion. H. pylori infection may play a protective role against bacterial diarrhea in children. So it is important to consider all of the positive and negative aspects of H. pylori infection before its eradication.
Risky spaces: Creating, contesting and communicating lines on environmental hazard maps

Funding information University of Waikato; Economic and Social Research Council, Grant/Award Number: RES-000-22-3070 This paper examines the tensions involved in the production, presentation and revision of hazard maps, focusing on the controversies that have become increasingly common when they are used to change government policy. Our scope includes all the major environmental hazards currently being mapped in New Zealand, one of the world’s most exposed and hazard-aware countries. Selecting one country also allowed a multi-hazard approach to be taken that helps provide messages for other countries. Drawing on interviews with 24 key informants, the paper identifies a range of reasons for explaining the recent growth in hazard mapping and why hazard maps sometimes resulted in high-profile controversies. Two themes emerged out of this analysis: an inconsistency in modelling and mapping hazards that created opportunity for challenge and the selective mobilisation of scientific uncertainty to dispute the legitimacy of official maps, particularly on developed land. The findings highlight the multiple roles of mapping, positioning maps as potentially instruments of both depoliticisation and repoliticisation. We emphasise how conflicts are most likely when maps are used as technocratic instruments of depoliticisation, and that creating maps in a more open way can generate valuable opportunities to engage with communities in more creative policy-making regarding the threats they face and how they can respond. Mapping processes that open up the space for critical debate can act as important debatesupport tools as well as decision-support tools, particularly when used to give voice to those not normally heard or treated as equal.
Threats to Validity in Analysis of Language Fragmentation on SourceForge Data

Reaching general conclusions through analysis of SourceForge data is difficult and error prone. Several factors conspire to produce data that is sparse, biased, masked, and ambiguous. We explore these factors and the negative effect that they had on the results of “Impact of Programming Language Fragmentation on Developer Productivity: a SourceForge Empirical Study. ” In addition, we question the validity of evolutionary or temporal analysis of development practices based on this data.
Governance of learning mechanisms : evidence from construction firms

The focus of knowledge management (KM) in the construction industry is moving towards capability building for value creation. The study reported by this paper is motivated by recent assertions about the genesis and evolution of knowledge management capability (KMC) in the strategic management field. It attempts to shed light on the governance of learning mechanisms that develop KMC within the context of construction firms. A questionnaire survey was administered to a sample of construction contractors operating in the very dynamic Hong Kong market to elicit opinions on the learning mechanisms and business outcomes of targeted firms. On the basis of a total of 149 usable responses, structural equation modeling (SEM) analysis identified relationships among knowledge-governance mechanisms, knowledge processes, and business performance, thereby supporting the existence of strategic learning loops. The study findings provide evidence from the construction context for capability assertions that knowledge-governance mechanisms and processes form learning mechanisms that carry out strategic learning to create value, effect performance outcomes, and ultimately drive the evolution of KMC. The findings imply that it is feasible for managing construction firms to govern learning mechanisms through managing the capability-based holistic KM system, thereby reconfiguring KMC to match needs in the dynamic market environment over time.
Multi‐criteria IoT resource discovery: a comparative analysis

The growth of real‐world objects with embedded and globally networked sensors allows to consolidate the Internet of things paradigm and increase the number of applications in the domains of ubiquitous and context‐aware computing. The merging between cloud computing and Internet of things named cloud of things will be the key to handle thousands of sensors and their data. One of the main challenges in the cloud of things is context‐aware sensor search and selection. Typically, sensors require to be searched using two or more conflicting context properties. Most of the existing work uses some kind of multi‐criteria decision analysis to perform the sensor search and selection, but does not show any concern for the quality of the selection presented by these methods. In this paper, we analyse the behaviour of the SAW, TOPSIS and VIKOR multi‐objective decision methods and their quality of selection comparing them with the Pareto‐optimality solutions. The gathered results allow to analyse and compare these algorithms regarding their behaviour, the number of optimal solutions and redundancy. Copyright © 2016 John Wiley & Sons, Ltd.
Rehabilitative Versorgung und gesundheitsbedingte Frühberentung von Personen mit Migrationshintergrund in Deutschland: Abschlussbericht

Rehabilitative Versorgung und gesundheitsbedingte Frühberentung von Personen mit Migrationshintergrund in Deutschland: Abschlussbericht Brzoska, Patrick; Voigtländer, Sven; Reutin, Barbara; Yilmaz-Aslan, Yüce; Barz, Irina; Starikow, Klara; Reiss, Katharina; Dröge, Angela; Hinz, Julia; Exner, Anne; Striedelmeyer, Lena; Krupa, Elzbieta; Spallek, Jacob; BergBeckhoff, Gabriele; Schott, Thomas; Razum, Oliver
Stressful Events and Student’s Quality of College Life in Malaysia Higher Institutions: A Multiple Regressions Analysis

The purpose of this study is to conduct a multiple regression analysis, the study is to examine whether there is a link between stressful life events as the dependent variables, demographic variables (gender, ethnicity, financial provider, own a transport, type of university and student’s quality of life). In order to analyze the consistency in finding, the study utilized descriptive method (mean, deviation), independent sample t –test and multiple regression. Principal component analysis was conducted to variables; stressful life event and quality of life to find a small set of linear combination of covariates which are uncorrelated with each other and to ensure the linear combinations chosen have maximal variances. A convenient random sampling of 1000 students from public and private higher institutions was interviewed via a structured questionnaire. The multiple regression finding revealed that overall stress (academic and non-academic) has significant impact on student quality of college life . The finding shows that only gender shows significant link to both type of stress and female students are more stressful than male students. These are consistent with the finding in independent sample t-test. The other significant result indicates a link between academic stress and MARA as a financial provider. Meanwhile to own a transport has a significant link to non-academic stress. These results have a far reaching implication on quality of life of the students and calls for student coping strategies to be implemented by the Ministry of Higher Education Malaysia (MOHE).
3′UTR-Mediated Gene Silencing of the Mixed Lineage Leukemia (MLL) Gene

Translocations involving the Mixed Lineage Leukemia (MLL) gene generate in-frame fusions of MLL with more than 50 different partner genes (PGs). Common to all MLL translocations is the exchange not only of coding regions, but also of MLL and PG 3′-untranslated regions (3′UTRs). As a result, the MLL-PG fusion is normally highly expressed and considered the main driver of leukemia development, whereas the function of the PG-MLL fusions in leukemic disease is unclear. As 3′UTRs have been recognized as determinant regions for regulation of gene expression, we hypothesized that loss of the MLL 3′UTR could have a role in generating high MLL-PG levels and leukemia development. Here, we first tested the MLL-PG and PG-MLL mRNA levels in different leukemic cells and tumours and uncovered differential expression that indicates strong repression by the MLL-3′UTR. Reporter assays confirmed that the 3′UTR of MLL, but not of its main PGs, harbours a region that imposes a strong gene silencing effect. Gene suppression by the MLL 3′UTR was largely microRNA independent and did not affect mRNA stability, but inhibited transcription. This effect can at least partially be attributed to a tighter interaction of the MLL 3′UTR with RNA polymerase II than PG 3′UTRs, affecting its phosphorylation state. Altogether, our findings indicate that MLL translocations relieve oncogenic MLL-PG fusions from the repressive MLL 3′UTR, contributing to higher activity of these genes and leukaemia development.
Functional MR Imaging during Auditory Word Perception: A Single-Trial Presentation Paradigm

Functional magnetic resonance imaging (fMRI), while still in relatively early stages of its development, has become a widespread tool for addressing issues in the neurobiology of language and other cognitive domains (e.g., Belliveau et al., 1991; Binder et al., 1994; Cohen et al., 1994; Hickok et al., 1995; Shaywitz et al., 1995; for a review of the technique see Bandettini et al., 1995). In a typical fMRI experiment, stimuli are presented in blocks of say 20–40 sec that alternate through several cycles with an equally long baseline/control period. So for example, a subject may see individual words presented one-at-a-time for 30 sec, then non-words for 30 sec, and so on for five cycles. This presentation scheme provides a serious constraint on experimental design in fMRI studies and consequently limits the kinds of questions one can address with this methodology. One cannot, to cite just one example, use lexical decision as a behavioral measure in the magnet because the item type (word/non-word) is fully predictable from the experimental design. Relatedly, under these experimental conditions it is unclear to what extent fMRI activations are due to expectation-driven (controlled) processes versus lower-level perceptual (automatic) processes. Here we present data from an alternative fMRI presentation scheme used with auditory speech perception. The paradigm is modeled on standard methodologies in event related potential (ERP) studies where test items are ran-
Internet Use and Psychological Wellbeing: A Study of International Students in Singapore

We investigated the relationship between psychological wellbeing (as indicated by participants’ level of loneliness, perceived academic stress and depression) and generalized problematic internet use. Data was collected from a sample of 103 international students studying in Singapore. Statistical analyses revealed that depression was the most important predictor of problematic internet use, followed by academic stress. Loneliness was found to mediate the relationship between problematic internet use and depression or academic stress. Implications of the findings for international students in the University context have been discussed.
Ipsilateral cortical fMRI responses after peripheral nerve damage in rats reflect increased interneuron activity

In the weeks following unilateral peripheral nerve injury, the deprived primary somatosensory cortex (SI) responds to stimulation of the ipsilateral intact limb as demonstrated by functional magnetic resonance imaging (fMRI) responses. The neuronal basis of these responses was studied by using high-resolution fMRI, in vivo electrophysiological recordings, and juxtacellular neuronal labeling in rats that underwent an excision of the forepaw radial, median, and ulnar nerves. These nerves were exposed but not severed in control rats. Significant bilateral increases of fMRI responses in SI were observed in denervated rats. In the healthy SI of the denervated rats, increases in fMRI responses were concordant with increases in local field potential (LFP) amplitude and an increased incidence of single units responding compared with control rats. In contrast, in the deprived SI, increases in fMRI responses were associated with a minimal change in LFP amplitude but with increased incidence of single units responding. Based on action potential duration, juxtacellular labeling, and immunostaining results, neurons responding to intact forepaw stimulation in the deprived cortex were identified as interneurons. These results suggest that the increases in fMRI responses in the deprived cortex reflect increased interneuron activity.
Linf Linf : An L-infinity Classifier

We introduce a classifier based on the L∞ norm. This classifier, called Linf, is a composition of four stages (transforming, projecting, binning, and covering) that are designed to deal with both the curse of dimensionality and computational complexity. Linf is not a hybrid or modification of existing classifiers; it employs a new covering algorithm. The accuracy of Linf on widely-used benchmark datasets is comparable to the accuracy of competitive classifiers and, in some important cases, exceeds the accuracy of competitors. Its computational complexity is sub-linear in number of instances and number of variables and quadratic in number of classes.
When Remembering Disrupts Knowing: Blocking Implicit Price Memory

Does explicit recall help or hurt memory-based comparisons? It is often assumed that attempting to recall information from memory should facilitate—or at least not disrupt—memory-based comparisons. Using the domain of price comparisons, the authors demonstrate that memory-based price comparisons are less accurate when consumers first attempt to recall the past price versus when they do not try to do so. Attempting—and failing at—explicit price recall focuses attention on metacognitive experience, resulting in a feeling-of-not-knowing, which then blocks the implicit memory that people could otherwise use to make accurate price comparisons. Drawing attention to this metacognitive feeling-of-not-knowing increases the blocking effect of recall on implicit memory, whereas drawing attention away from the feeling reduces the blocking effect. The results identify a new type of memory blocking—metacognitive memory blocking—in which the feeling-of-not-knowing blocks implicit memory during judgments. They also provide further evidence of dual representations of price memory and demonstrate that most memory-based price comparisons are based on implicit memory and do not entail explicit recall of the reference price.
Transtracheal puncture: a forgotten procedure

Transtracheal puncture has long been known as a safe, low-cost procedure. However, with the advent of bronchoscopy, it has largely been forgotten. Two researchers have suggested the use of α-amylase activity to diagnose salivary aspiration, but the normal values of this enzyme in tracheobronchial secretions are unknown. We aimed to define the normal values of α-amylase activity in tracheobronchial secretions and verify the rate of major complications of transtracheal puncture. From October 2009 to June 2011, we prospectively evaluated 118 patients without clinical or radiological signs of salivary aspiration who underwent transtracheal puncture before bronchoscopy. The patients were sedated with a solution of lidocaine and diazepam until they reached a Ramsay sedation score of 2 or 3. We then cleaned the cervical region and anesthetized the superficial planes with lidocaine. Next, we injected 10 mL of 2% lidocaine into the tracheobronchial tree. Finally, we injected 10 mL of normal saline into the tracheobronchial tree and immediately aspirated the saline with maximum vacuum pressure to collect samples for measurement of the α-amylase level. The α-amylase level mean ± SE, median, and range were 1914 ± 240, 1056, and 24-10,000 IU/L, respectively. No major complications (peripheral desaturation, subcutaneous emphysema, cardiac arrhythmia, or hemoptysis) occurred among 118 patients who underwent this procedure. Transtracheal aspiration is a safe, low-cost procedure. We herein define for the first time the normal α-amylase levels in the tracheobronchial secretions of humans.