Miracle-dz/UniFAR-FTUs huggingface dataset:
Institutional Investors and Accounting Restatements

This paper investigates the role that institutional investors play in the market reaction to accounting restatements. We show that transient institutional investors, defined as institutions with short investment horizons and high portfolio turnover, significantly reduce their holdings in a restating firm at least one quarter prior to the quarter of the restatement announcement. This result holds after controlling for factors such as return momentum, unexpected earnings, size, book-to-market, and the portfolio weight of the firm to the institution. Second, using previously identified predictors of earnings manipulation, we show that institutional investors react most negatively to an increase in the days sales in receivables and high accruals. Finally, we demonstrate that the market reaction to accounting restatements for firms with higher levels of transient institutional ownership is more negative in the period prior to the restatement announcement. Taken together, these results suggest that institutional investors act as though they partially anticipate potential accounting irregularities and adjust their holdings downward prior to the restatement announcement.
Gradient Method with Retards and Generalizations

A generalization of the steepest descent and other methods for solving a large scale symmetric positive definitive system Ax = b is presented. Given a positive integer m, the new iteration is given by $x_{k+1} = x_k - \lambda (x_{\nu(k)}) (A x_k - b)$, where $\lambda (x_{\nu(k)})$ is the steepest descent step at a previous iteration $\nu(k) \in \{k, k-1, \ldots,$ max$\{0,k-m\}\}$. The global convergence to the solution of the problem is established under a more general framework, and numerical experiments are performed that suggest that some strategies for the choice of $\nu(k)$ give rise to efficient methods for obtaining approximate solutions of the system.
Missing baryons and the soft X-ray background

The X-ray background intensity around Lick count galaxies and rich clusters of galaxies is investigated in three ROSAT energy bands. It is found that the X-ray enhancements surrounding concentrations of galaxies exhibit significantly softer spectrum than the standard cluster emission and the average extragalactic background. The diffuse soft emission accompanying the galaxies is consistent with the thermal emission of the hot gas postulated first by the Cen & Ostriker hydrodynamic simulations. Our estimates of the gas temperature – although subject to large uncertainties – averaged over several Mpc scales are below 1 keV, which is substantially below the temperature of the intra-cluster gas, but consistent with temperatures predicted for the local intergalactic medium. It is pointed out that the planned ROSITA mission would be essential for our understanding of the diffuse thermal component of the background.
A Subspace Based Approach to Pulse Design with Application to UWB Communications

In UWB systems, FCC mask puts a constraint on the Maximum Allowable Transmit Power (MATP) of a pulse. The transmit power of a pulse is an important parameter that determines the BER performance and range. In this paper a subspace based approach has been found to make the MATP optimization easier which otherwise seems intractable due to mask constraints. The design procedure begins with some pulse width and then we optimize for MATP. The obtained pulses turn out to have higher MATP than the known pulses of the same width. We show that using the proposed pulses, a lower BER than that of the existing pulses can be achieved. The proposed approach is applicable to the FCC mask or any other piecewise constant mask that may be proposed in future.
The Identification of Aluminum in Human Brain Tissue Using Lumogallion and Fluorescence Microscopy

Aluminum in human brain tissue is implicated in the etiologies of neurodegenerative diseases including Alzheimer’s disease. While methods for the accurate and precise measurement of aluminum in human brain tissue are widely acknowledged, the same cannot be said for the visualization of aluminum. Herein we have used transversely-heated graphite furnace atomic absorption spectrometry to measure aluminum in the brain of a donor with Alzheimer’s disease, and we have developed and validated fluorescence microscopy and the fluor lumogallion to show the presence of aluminum in the same tissue. Aluminum is observed as characteristic orange fluorescence that is neither reproduced by other metals nor explained by autofluorescence. This new and relatively simple method to visualize aluminum in human brain tissue should enable more rigorous testing of the aluminum hypothesis of Alzheimer’s disease (and other neurological conditions) in the future.
Variables Associated With Secondary Traumatic Stress Among Mental Health Professionals

The current study investigated variables associated with secondary traumatization in mental health professionals. Participants included 88 psychologists, social workers, mental health counselors, and creative arts therapists. These participants completed the modified Stroop procedure, which is an objective measure of secondary trauma. They also completed the Secondary Trauma Scale, the Life Events Checklist, the Job Satisfaction Survey, and a demographics questionnaire. Results revealed that between 23 and 27% of respondents were positive for secondary traumatization. Whereas personal trauma history was associated with the modified Stroop and females reported more secondary trauma than males, no relationship was found between level of trauma exposure, quality of supervision, and job satisfaction to secondary traumatization. Overall results indicate a relatively high level of secondary trauma among mental health workers and also show the modified Stroop to be a valid method for studying secondary trauma.
Clinical and echocardiographic analysis of patients suffering from recurrent takotsubo cardiomyopathy

Background Recurrence of takotsubo cardiomyopathy (TTC) is a well-known complication. However, current literature lists only a few isolated cases. We aimed to determine the incidence and clinical significance of recurrent TTC. Methods & Results Our institutional database constituted a collective of 114 patients diagnosed with TTC since 2003. Close follow-up of these patients revealed a recurrence of TTC in seven of these (6.1%). The time interval between the index event and its recurrence varied between six months and six years. Arterial hypertension was more revealed in the recurrence group of TTC compared to non-recurrence group, (P = 0.02). Chronic obstructive pulmonary disease and/or asthma was more diagnosed in the recurrence group, (P = 0.04). Clinical events like right ventricular involvement, TTC related complications such as life-threatening arrhythmias, pulmonary congestion and in hospital death were observed more frequently in the recurrent episode. Over a mean follow-up of one year the mortality rate was similar in both groups. Conclusions Recurrence of TTC within six years after index event is not an uncommon phenomenon. In the event of right ventricular involvement in the relapse phase, it might be associated with a higher complication rate. TTC recurrence should be the first differential diagnosis in patients with a past history of TTC.
Endogenous reverse transcription of human immunodeficiency virus type 1 in physiological microenviroments: an important stage for viral infection of nondividing cells

Endogenous reverse transcription (ERT) of retroviruses has long been considered a somewhat artificial process which only mimics reverse transcription occurring in target cells, as detergents or amphipathic peptides have classically been used to make the envelopes of retroviruses in these reaction systems permeable. Recently, several studies suggested that ERT of human immunodeficiency virus type 1 (HIV-1) might occur without detergent treatment. However, this phenomenon could be due to damage of the retroviral envelope during the process of virion purification or freezing and thawing. In this report, intravirion HIV-1 ERT, without detergent-induced permeabilization, is demonstrated to occur in the natural microenvironments of HIV-1 virions and is not caused by artificial processes. Therefore, this stage of the viral life cycle was termed natural ERT (NERT). The efficiency of NERT in HIV-1 virions was markedly augmented by several physiological substances in the extracellular milieu, such as polyamines and deoxyribonucleoside triphosphates. In addition, HIV-1 virions in seminal plasma samples harbored dramatically higher levels of full-length or nearly full-length reverse transcripts than virions isolated from peripheral blood plasma samples of HIV-1-seropositive men. When HIV-1 virions were incubated with seminal plasma samples, infectivity in initially nondividing cells was also significantly enhanced. Thus, we suggest that HIV-1 virions are actively altered by the extracellular microenvironment and that NERT may play an important role in viral infection of nondividing cells.
Modelling of Mercury in the Arctic with the Danish Eulerian Hemispheric Model

A new 3-D mercury model has been developed within the Danish Arctic Monitoring and Assessment Pro- gramme (AMAP). The model is based on the Danish Eule- rian Hemispheric Model, which in the original version has been used to study the transport of SO2, SO 2 and Pb into the Arctic. It was developed for sulphur in 1990 and in 1999 also lead was included. For the current study a chem- ical scheme for mercury has been included and the model is now applied to the mercury transport problem. Some experi- ments with the formulation of the mercury chemistry during the Polar Sunrise are carried out in order to investigate the observed depletion. Some of the main conclusions of the work described in this paper are that atmospheric transport of mercury is a very important pathway into the Arctic and that mercury depletion in the Arctic troposphere during the Polar Sunrise contributes considerably to the deposition of mercury in the Arctic.
Question Answering in the Medical Domain : the Role of Clinical Outcome and Polarity

Answers to clinical questions are often complicated. In this paper, we formulate the problem as a multi-document summarization task, and construct extraction-based summaries to answer questions about effects of applying a medication to a disease. The experimental results show that identifying clinical outcomes and detecting their polarity improves the performance of summarization. Domain knowledge and context information is effective in obtaining the information about clinical outcomes.
Verb Valency and Argument Non-correspondence in a Bilingual Treebank

In this paper we present a contrastive study of one interesting non-correspondence between deep syntactic valency structures of two different languages. On the material of the Prague Czech-English Dependency Treebank we observe sentences in which an Addressee argument in one language is linked translationally to a Patient argument in the other one, particularly we aim our attention at the class of judgement verbs (in a broad sense). Considering this class of verbs, we analyze the relevant examples and discuss the nature of “the third argument” in the valency structure. As a result, we reconsider the conventions of argument labelling with the aim of achieving better consistency of annotation and we suggest possible ways of adjusting the valency theory itself to the needs of multilingual data.
Identification of GRB2 and GAB1 Coexpression as an Unfavorable Prognostic Factor for Hepatocellular Carcinoma by a Combination of Expression Profile and Network Analysis

Aim To screen novel markers for hepatocellular carcinoma (HCC) by a combination of expression profile, interaction network analysis and clinical validation. Methods HCC significant molecules which are differentially expressed or had genetic variations in HCC tissues were obtained from five existing HCC related databases (OncoDB.HCC, HCC.net, dbHCCvar, EHCO and Liverome). Then, the protein-protein interaction (PPI) network of these molecules was constructed. Three topological features of the network ('Degree', 'Betweenness', and 'Closeness') and the k-core algorithm were used to screen candidate HCC markers which play crucial roles in tumorigenesis of HCC. Furthermore, the clinical significance of two candidate HCC markers growth factor receptor-bound 2 (GRB2) and GRB2-associated-binding protein 1 (GAB1) was validated. Results In total, 6179 HCC significant genes and 977 HCC significant proteins were collected from existing HCC related databases. After network analysis, 331 candidate HCC markers were identified. Especially, GAB1 has the highest k-coreness suggesting its central localization in HCC related network, and the interaction between GRB2 and GAB1 has the largest edge-betweenness implying it may be biologically important to the function of HCC related network. As the results of clinical validation, the expression levels of both GRB2 and GAB1 proteins were significantly higher in HCC tissues than those in their adjacent nonneoplastic tissues. More importantly, the combined GRB2 and GAB1 protein expression was significantly associated with aggressive tumor progression and poor prognosis in patients with HCC. Conclusion This study provided an integrative analysis by combining expression profile and interaction network analysis to identify a list of biologically significant HCC related markers and pathways. Further experimental validation indicated that the aberrant expression of GRB2 and GAB1 proteins may be strongly related to tumor progression and prognosis in patients with HCC. The overexpression of GRB2 in combination with upregulation of GAB1 may be an unfavorable prognostic factor for HCC.
A COMPARISON OF THE SPEECH STYLES OF NIGERIAN AND CHINESE EFL LEARNERS IN MALAYSIA

This paper focused on the speech styles of two groups of learners, Nigerian learners with English as their official language and Chinese learners with English as a foreign language studying in Malaysia. A questionnaire was developed to extract personal details while a classroom task was given to gather data. Consent was given voluntarily. Spoken data were recorded, transcribed verbatim and then analyzed and findings were further substantiated by an interview. Analysis showed that Nigerian learners are less prone to using fillers as compared to Chinese EFL learners. This implied that Chinese EFL learners were less comfortable in using English. Both Nigerian and Chinese learners used the same amount of intensifiers suggesting that they do not feel passionate when talking about themselves, as the task demanded. The findings of this study will enable foreign language learners to understand themselves better and assist local teachers and classmates to be more tolerant when communicating with them as it can help to minimize misunderstandings. Nonetheless, further research may be required to verify the findings. Keywords: Speech styles, fillers, intensifiers, Nigerian, Chinese, EFL learners
Some factors affecting performance of a wireless sensor network — entropy-based analysis

Electromagnetic interferences and other disturbances in industrial environment may decrease the performance of wireless sensor networks. However, the lack of empirical results providing proof for these arguments is evident. In this paper, analysis results of systematic experiments carried out for potential, disturbing factors in industrial environment are presented. Moreover, a novel entropy-based approach to measure changes in jitter variation is introduced. The selected approach performed well, being able to point out statistically significant sources of disturbances.
Citizenship and Politics of Belonging: Inclusionary and Exclusionary Framings of Gender and Ethnicity

The article explores the intersectional approach to citizenship and politics of belonging focusing on the different framings of gender and ethnicity. It investigates the intersections of gender and ethnicity in the construction of national belongings. The hijab debates illustrate the contextual uses of intersectionality in public debates and illuminate the different framings of gender and ethnicity with both inclusionary and exclusionary effects. The argument is that political actors can (mis)use arguments about gender equality in order to construct social distinctions between ‘them and us’ – between the white gender equal majority and the oppressed Muslim women.
Learning to learn at university. The effects of an instrumental subject on learning strategies and academic achievement / Aprender a aprender en la universidad. Efectos de una materia instrumental sobre las estrategias de aprendizaje y el rendimiento académico

Abstract Self-regulated learning is very important at university, since students must manage the strategies and abilities necessary to be autonomous and effective in their learning. The aim of this study was to analyse the effects of a course designed for this purpose on learning strategies and students’ achievement of first-year university students. A quasi-experimental pre-test/post-test design was used, with an experimental group and a control group, applying measurement instruments before starting and after finishing the course. The learning process was analysed on this course, with students being trained in the use of relevant learning strategies — metacognitive strategies, strategies for processing and using information and affective and motivational strategies. The sample consisted of 47 students, 23 of them belonging to the experimental group and 24 of them to the control group, from various degrees at the University of Valencia. The results confirmed significant improvements in the learning strategy scores of the experimental group compared to the control group. There was also an improvement in academic achievement, but in this case the differences were not statistically significant.
Some complexity issues on the simply connected regions of the two-dimensional plane

This paper studies the computational complexity of subsets of the plane R2. We propose a general framework in which continuous problems in computational complex analysis can be studied in the context of discrete complexity theory (i.e., the NP theory). This framework is based on the bit-operation model used in recursive analysis [Pour-El and Richards, 1989] and complexity theory of real functions of Ko and Friedman [1982]. It is an extension of the polynomial-time measure theory studied in Chapter 5 of Ko [1991]. The fundamental notion in this study is the class of bounded subsets of the plane R2 whose membership problem is polynomial-time solvable. We define two such notions: the polynomial-time approximable sets and the polynomial-time recognizable sets. Informally, a subset S ~ R2 is polynomial-time approzimable if there is a machine M which, on a given point z c R2 and an integer n, determines whether z is in S within time polynomial in n and admitting errors only on a set E ~ R2 of measure 2-”. A subset S ~ R2 is polynomial-time recognizable if there is a machine M which on a given point z G R2 and an integer n, determines whether z is in S within time polynomial in n and admitting errors only on points z that are within a distance 2-n of the boundary of S.3 To demonstrate that these two notions of polynomialtime computable sets are natural and interesting, we
The role of violence between parents on the sexism and well-being of their children / El papel de la violencia entre progenitores en el sexismo y bienestar de los hijos e hijas

Abstract The main purpose of this study was to analyse whether children’s exposure to marital violence was associated with higher levels of hostile or benevolent sexism and with lower psychological well-being when they are adults. The sample consisted of 1,378 university students of both sexes aged between 17 and 30. As was expected, marital violence and ambivalent sexism inversely predicted children’s psychological well-being. Children’s exposure to marital violence was a significant predictor of ambivalent sexism, although its low predictive value is discussed.
The Effect of Perceived Hedonic Quality on Product Appealingness

Usability can be broadly defined as quality of use. However, even this broad definition neglects the contribution of perceived fun and enjoyment to user satisfaction and preferences. Therefore, we recently suggested a model taking "hedonic quality" (HQ; i.e., non-task-oriented quality aspects such as innovativeness, originality, etc.) and the subjective nature of "appealingness" into account (Hassenzahl, Platz, Burmester, & Lehner, 2000). In this study, I aimed to further elaborate and test this model. I assessed the user perceptions and evaluations of 3 different visual display units (screen types). The results replicate and qualify the key findings of Hassenzahl, Platz, et al. (2000) and lend further support to the model's notion of hedonic quality and its importance for subjective judgments of product appealingness.
An Application of Genetic Algorithm with Iterative Chromosomes for Image Clustering Problems

Many heuristic algorithms have been applied to the clustering problem, which is known to be NP Hard. This paper represents a Genetic Algorithm for clustering on image data. Genetic algorithms have been used in a wide variety of fields to perform clustering, however, the technique normally has a long running time in terms of input set size. This paper proposes an efficient genetic algorithm for clustering on very large data sets, especially on image data sets. In this study, a heuristic method based on Genetic Algorithms (GA) is adopted to automatically determine the number of cluster centroids during unsupervised classification. Efficient time techniques are used as a performance measure for clustering on image data. This paper compares Genetic algorithm with K-Means algorithm for clustering on image data.
A STUDY OF DIFFERENTIAL ROTATION ON II PEGASI VIA PHOTOMETRIC STARSPOT IMAGING

We present the results of a study of differential rotation on the K2 IV primary of the RS CVn binary II Pegasi (HD 224085) performed by inverting light curves to produce images of the dark starspots on its surface. The data were obtained in the standard Johnson B and V filter passbands via the Tennessee State University T3 0.4 m Automated Photometric Telescope from JD 2447115.8086–2455222.6238 (1987 November 16–2010 January 26). The observations were subdivided into 79 data sets consisting of pairs of B and V light curves, which were then inverted using a constrained nonlinear inversion algorithm that makes no a priori assumptions regarding the number of spots or their shapes. The resulting surface images were then assigned to 24 groups corresponding to time intervals over which we could observe the evolution of a given group of spots (except for three groups consisting of single data sets). Of these 24 groups, six showed convincing evidence of differential rotation over time intervals of several months. For the others, the spot configuration was such that differential rotation was neither exhibited nor contraindicated. The differential rotation we infer is in the same sense as that on the Sun: lower latitudes have shorter rotation periods. From plots of the range in longitude spanned by the spotted regions versus time, we obtain estimates of the differential rotation coefficient k defined as in earlier work by Henry et al. and show that our results for its value are consistent with the value obtained therein.