Miracle-dz/UniFAR-FTUs huggingface dataset:
Federal Reserve Bank of New York Staff Reports Firm Value and Cross-Listings : The Impact of Stock Market Prestige

This study investigates the valuation impact of a firm’s decision to cross-list on a more (or less) prestigious stock exchange relative to its own domestic market. We use network analysis to derive broad market-based measures of prestige for forty-five country or regional stock exchange destinations between 1990 and 2006. We find that firms crosslisting in a more prestigious market enjoy significant valuation gains over the five-year period following the listing. We also document a reverse effect for firms cross-listing in less prestigious markets: These firms experience a significant decline in valuation over the five years following the listing. The reputation of the cross-border listing destinations is therefore a useful signal of a firm’s value going forward. Our findings are consistent with the view that cross-listing in a prestigious market enhances a firm’s visibility, strengthens corporate governance, and lowers informational frictions and capital costs.
Dynamic Matching in Overloaded Waiting Lists

This paper introduces a stylized model to capture distinctive features of waiting list allocation mechanisms. First, agents choose among items with associated expected wait times. Waiting times serve a similar role to that of monetary prices in directing agents' choices and rationing items. Second, the expected wait for an item is endogenously determined and randomly fluctuates over time. We evaluate welfare under these endogenously determined waiting times and find that waiting time fluctuations lead to misallocation and welfare loss. A simple randomized assignment policy can reduce misallocation and increase welfare. (JEL C78, D61, D82, D83)
The relative effects of metalinguistic explanation and direct written corrective feedback on children’s grammatical
 accuracy in new writing

There has been little research investigating the effects of form-focused instruction (FFI) on the second language acquisition of children. This article reports a quasi-experimental study of integrated form-focused instruction for 33 children aged 9–12 years. They completed four dictogloss tasks designed to elicit the use of the Present Perfect Tense and received instruction consisting of either explicit metalinguistic explanation (group 1), direct written correction (group 2) or no form-focused instruction (the comparison group) between performing the tasks. Accuracy in the production of the target structure across the four tasks was variable and showed no improvement from the first to the last. Nor were there any statistically significant differences in accuracy among the three groups. The results support some earlier studies of young children (e.g. Fazio, 2001) that have failed to show that FFI benefits young children. This may be because children fail to make use of their metalinguistic knowledge of grammatical features when undertaking meaning-focused writing tasks.
A Regime-Switching SVAR Analysis of Quantitative Easing

Central banks of major market economies have recently adopted QE (quantitative easing), allowing excess reserves to build up while maintaining the policy rate at very low levels. We develop a regime-switching SVAR (structural vector autoregression) in which the monetary policy regime, chosen by the central bank responding to economic conditions, is endogenous and observable. The model can incorporate the exit condition for terminating QE. We then apply the model to Japan, a country that has accumulated, by our count, 130 months of QE as of December 2012. Our impulse response analysis yields two findings about QE. First, an increase in reserves raises inflation and output. Second, terminating QE is not necessarily deflationary.
Pedagogical practices in a higher education context: Case studies in environmental and science education

My study investigates opportunities that may currently be available to enable the transformation of post-apartheid teacher education. I examine two case studies of my own professional practice. The first case study involves in-service education work that I performed with teachers in a local community, Grassy Park. The second case study represents work I performed with students in a pre-service education programme at the University of Stellenbosch. My study aims to: • Critically examine the implications of social issues, particularly environmental issues, for pedagogical practices generally and for South African pedagogical work in particular. • Critically review the changing socio-historical determinants of pedagogical practices in South African teacher education. • Investigate changing pedagogical practices by describing and reflecting on work done in my own professional contexts as a science/environmental teacher educator at a historically Afrikaner university. With respect to teacher education, Pendlebury (1998) argues that we are seeing shifts in public space, evaluative space, pedagogical space and institutional space from insulated space (hidden from public scrutiny) to a more porous space. In this study I am concerned with pedagogical space that, in Pendlebury's (1998:345) terms determines 'who may learn (or teach), how and what they learn (or teach), when and for how long and where'. I use these categories of Pendlebury (1998:345) together with Turnbull's (1997) perspectives on knowledge production as conceptual tools to frame my analyses of the cases. Although a significant part of my study focuses on classroom practices, I take pedagogy to have a much broader meaning that incorporates in Hernandez's (1997:11) terms 'all spaces in which knowledge is produced and identities are formed'. This research report offers a brief insight into the complexities of change at the micro-level of classroom practices. But, importantly also contextualises these micro-level pedagogical practices within broader socio-historical determinants and provides praxiological comments on postapartheid education policies. The research also initiates an investigation into the social organisation of trust in post-apartheid South Africa.
Interaction of mouse sperm with purified sperm receptors covalently linked to silica beads.

We describe a solid-phase assay that has permitted further analysis of zona pellucida glycoprotein, ZP3, as sperm receptor and acrosome reaction-inducer during fertilization in mice. The assay employs silica beads that contain epoxy groups to which purified, mouse oocyte ZP3 is covalently linked (ZP3-beads). ZP3-beads were characterized, e.g. by whole-mount autoradiography and flow cytofluorometry, incubated with capacitated mouse sperm under a variety of conditions, and the extent of sperm binding determined by light microscopy. Results of experiments presented suggest the following: (1) sperm bind specifically to ZP3-beads, but not to silica beads either exposed to 2-aminoethanol or derivatized with oocyte ZP2, fetuin or bovine serum albumin. (2) In nearly all cases, only one sperm binds per ZP3-bead and binding occurs via the sperm head. (3) The extent of sperm binding to ZP3-beads is dependent on ZP3 and sperm concentrations, as well as on incubation time and temperature. (4) Sperm binding to ZP3-beads is unaffected by antibodies directed against ZP3, but is inhibited in a reversible manner by treatment of ZP3-beads with galactose oxidase. (5) Only acrosome-intact sperm bind to ZP3-beads but, once bound, sperm can undergo the acrosome reaction, which results in their release from ZP3-beads. (6) Islet-activating protein and 3-quinuclidinyl benzilate, two inhibitors of the zona pellucida-induced acrosome reaction, prevent sperm bound to ZP3-beads from undergoing the acrosome reaction. These results confirm and extend previous studies of sperm-egg interaction in mice, and suggest that the solid-phase assay will be useful for both cellular and biochemical analyses of mammalian fertilization.
A Dynamic Game of Mobile Agent Placement in a MANET

In this paper, we describe a novel game-theoretic formulation of the optimal mobile agents placement problem which arises in the context of Mobile Ad-hoc Networks (MANETs). In particular, we consider two classes of multistage games: sequential and simultaneous. For such games, the definitions of the Nash equilibria and the cooperative solution are given. The described games exhibit a number of interesting features. For instance, the Nash equilibrium may turn out to be unattainable in both a simultaneous and a sequential game. In this case, the game dynamics may exhibit the behaviour similar to that of a limit cycle albeit in a discrete space. A modelling environment for the analysis of different strategies of the players was developed in MATLAB. The programme generates various game situations and determines each players move by solving respective optimisation problems. Using the developed environment, two specific game scenarios were considered in detail.
Number 26 Assessing IRT Model-Data Fit for Mixed Format Tests ∗

This study examined various model combinations and calibration procedures for mixed format tests under different item response theory (IRT) models and calibration methods. Using real data sets that consist of both dichotomous and polytomous items, nine possibly applicable IRT model mixtures and two calibration procedures were compared based on traditional and alternative goodnessof-fit statistics. Three dichotomous models and three polytomous models were combined to analyze mixed format test using both simultaneous and separate calibration methods. To assess goodness of fit, The PARSCALE’s G was used. In addition, two fit statistics proposed by Orlando and Thissen (2000) were extended to more general forms to enable the evaluation of fit for mixed format tests. The results of this study indicated that the three parameter logistic model combined with the generalized partial credit model among various IRT model combinations led to the best fit to the given data sets, while the one parameter logistic model had the largest number of misfitting items. In a comparison of three fit statistics, some inconsistencies were found between traditional and new indices for assessing the fit of IRT models to data. This study found that the new indices indicated considerably better model fit than the traditional indices.
Measuring plasticity with orientation contrast microscopy in aluminium 6061-T4

Orientation contrast microscopy (i.e., electron backscattered diffraction, EBSD) was employed to monitor the plastic strain in loaded tensile samples of aluminium alloy Al6061 in T4 condition. The kernel average misorientation (KAM) is known to be an appropriate parameter in orientation contrast microscopy which has the potential to characterise the plastic strain by monitoring the local misorientations. This technique was applied here to gauge the extent of the plastic zone around a fatigue crack. To establish the magnitude of strain (which can be identified by the KAM parameter), a series of tensile samples were strained in the range of 1% to 25%. KAM maps were compared, and the average misorientations were related to the tensile strain values. The KAM distribution functions for all the strained samples were derived from a large scanned area. In addition, Vickers microhardness tests were conducted for these series of samples. This allowed the comparison of the mesoscopic plastic strain measured by Vickers microhardness with the micro plastic strain locally obtained by KAM. Noise was observed in the average KAM values up to a plastic strain of 1.5%. For the plastic strain exceeding 1.5%, noise no longer dominates the KAM map, and a positive—though not linear—correspondence between plastic strain and KAM was observed. The observed plastic zone at the tip of the fatigue crack by micro-Vickers hardness measurements was about an order of magnitude higher than the plastic zone observed on the KAM maps. In view of the calibration of KAM values on the tensile samples, it could be concluded that in the larger area of the plastic zone, the strain did not exceed the critical value of 1.5%.
THE IMPACT OF WELFARE AND LABOUR MARKET INSTITUTIONS ON INFORMAL RECRUITMENT IN EUROPEAN YOUTH LABOUR MARKETS

ABSTRACT Youth labour markets where informal recruitment practices predominate are likely to amplify existing inequalities among young job seekers. Whereas most literature on informal recruitment focuses on characteristics of individual job seekers and the nature of the jobs they obtain, this article suggests to relate this important issue to overarching dynamics of welfare and labour market institutions. Analyses of survey data among young people with a history of longer-term unemployment in eight European countries suggest that comprehensive welfare state arrangements may substitute for the importance of personal network resources in the job search process. Thus the welfare state may intervene by providing active measures to facilitate the job-matching process and by providing economic means to make young people less dependent on their social network. The level of youth unemployment also seems to be related to the extent of informal recruitment, which is found to be more widespread in the countries with high rates of youth unemployment.
Sensitivity and Specificity of Interictal EEG-fMRI for Detecting the Ictal Onset Zone at Different Statistical Thresholds

There is currently a lack of knowledge about electroencephalography (EEG)-functional magnetic resonance imaging (fMRI) specificity. Our aim was to define sensitivity and specificity of blood oxygen level dependent (BOLD) responses to interictal epileptic spikes during EEG-fMRI for detecting the ictal onset zone (IOZ). We studied 21 refractory focal epilepsy patients who had a well-defined IOZ after a full presurgical evaluation and interictal spikes during EEG-fMRI. Areas of spike-related BOLD changes overlapping the IOZ in patients were considered as true positives; if no overlap was found, they were treated as false-negatives. Matched healthy case-controls had undergone similar EEG-fMRI in order to determine true-negative and false-positive fractions. The spike-related regressor of the patient was used in the design matrix of the healthy case-control. Suprathreshold BOLD changes in the brain of controls were considered as false positives, absence of these changes as true negatives. Sensitivity and specificity were calculated for different statistical thresholds at the voxel level combined with different cluster size thresholds and represented in receiver operating characteristic (ROC)-curves. Additionally, we calculated the ROC-curves based on the cluster containing the maximal significant activation. We achieved a combination of 100% specificity and 62% sensitivity, using a Z-threshold in the interval 3.4–3.5 and cluster size threshold of 350 voxels. We could obtain higher sensitivity at the expense of specificity. Similar performance was found when using the cluster containing the maximal significant activation. Our data provide a guideline for different EEG-fMRI settings with their respective sensitivity and specificity for detecting the IOZ. The unique cluster containing the maximal significant BOLD activation was a sensitive and specific marker of the IOZ.
Lettuce (Lactuca sativa L. var. Sucrine) growth performance in complemented aquaponic solution outperforms hydroponics

Plant growth performance is optimized under hydroponic conditions. The comparison between aquaponics and hydroponics has attracted considerable attention recently, particularly regarding plant yield. However, previous research has not focused on the potential of using aquaponic solution complemented with mineral elements to commercial hydroponic levels in order to increase yield. For this purpose, lettuce plants were put into AeroFlo installations and exposed to hydroponic (HP), aquaponic (AP), or complemented aquaponic (CAP) solutions. The principal finding of this research was that AP and HP treatments exhibited similar (p > 0.05) plant growth, whereas the shoot weight of the CAP treatment showed a significant (p 0.05) in AP and CAP treatments, and both were significantly higher (p < 0.05) than that observed in the HP treatment. The results highlight the beneficial effect of recirculating aquaculture system (RAS) water on plant growth. The findings represent a further step toward developing decoupled aquaponic systems (i.e., two- or multi-loops) that have the potential to establish a more productive alternative to hydroponic systems. Microorganisms and dissolved organic matter are suspected to play an important role in RAS water for promoting plant roots and shoots growth.
Understanding the Motivation of Vietnamese International Students and Their Higher Education Experiences in the United States

This research describes what motivates Vietnamese students to come to the U.S. to study for a degree, what outcomes they expect, and what they experience academically and culturally while studying in the U.S. Currently the surge of international students from Vietnam has reached an all time high of 13,112 students to the U.S. This moves the relatively small South East Asian nation to the ranking of ninth among all nations for the number of international students sent to the U.S. in depth interviews were conducted fall semester 2011 with 11 students enrolled in two large public universities in the Dallas-Fort Worth-Denton Metro area. the participants were students from Vietnam holding J-1 or F-1 visas who were in their sophomore year or beyond. Interviews were conducted with these undergraduate and graduate students on the campus where each was enrolled. Interview transcripts were provided to participants for their review and comments. Ethnograph qualitative research software was used to analyze and code the data. These students reported that the increased number of students coming to study in the U.S. is because of the reputation of higher education in the U.S., relatives living in the U.S. who create a support system, and economic growth in Vietnam which has made education abroad more accessible. More students are coming to the U.S. for study because of the respect that these students families and friends have for the educational system and potential of opportunity that a U.S. degree brings. Meaningful relationships with other students provide a better and broader educational experience for Vietnamese international students. Vietnamese international students desire not only gainful employment from their degree but also a balanced growth experience that includes friendships, immersion in the culture, and being responsible members of the host society. These students made strategic use of the community college to enhance their higher education experience. the findings indicate that universities and colleges interested in attracting students from Vietnam should forge partnerships between community colleges and universities and with local Vietnamese communities to promote recruitment, affordability, retention, and graduation.
Rxte Determination of the Intermediate Polar Sta- Tus of Xss J00564+4548, Igr J17195-4100, and Xss J12270-4859 How to Cite

Aims. We determine the nature of the intermediate polar candidates XSS J00564+4548, IGR J17195–4100, and XSS J12270–4859. Methods. Pointed RXTE observations searched for intermediate polar characteristics in these candidate systems. Results. XSS J00564+4548 exhibits a period of 465.68 ± 0.07 s, which we interpret as the spin period, an energy dependent modulation depth, and a spectrum that is fit by a 22 keV photoelectrically absorbed bremsstrahlung with an iron line profile. IGR J17195–4100 shows several candidate periodicities and a spectrum that is fit by a power law with an iron line. XSS J12270–4859 exhibits a candidate spin period of 859.57 ± 0.64 s and a spectrum that is fit by a power law with no evidence of an iron line. Conclusions. XSS J00564+4548 is confirmed to be an intermediate polar. IGR J17195–4100 and XSS J12270–4859 both show some properties of intermediate polars, but cannot be confirmed as definite members of the class here.
Neural Substrates for Action Understanding at Different Description Levels in the Human Brain

Understanding complex movements and abstract action goals is an important skill for our social interactions. Successful social interactions entail understanding of actions at different levels of action description, ranging from detailed movement trajectories that support learning of complex motor skills through imitation to distinct features of actions that allow us to discriminate between action goals and different action styles. Previous studies have implicated premotor, parietal, and superior temporal areas in action understanding. However, the role of these different cortical areas in action understanding at different levels of action description remains largely unknown. We addressed this question using advanced animation and stimulus generation techniques in combination with sensitive functional magnetic resonance imaging adaptation or repetition suppression methods. We tested the neural sensitivity of fronto-parietal and visual areas to differences in the kinematics and goals of actions using kinematic morphs of arm movements. Our findings provide novel evidence for differential involvement of ventral premotor, parietal, and temporal regions in action understanding. We show that the ventral premotor cortex encodes the physical similarity between movement trajectories and action goals that are important for exact copying of actions and the acquisition of complex motor skills. In contrast, whereas parietal regions and the superior temporal sulcus process the perceptual similarity between movements and may support the perception and imitation of abstract action goals and movement styles. Thus, our findings propose that fronto-parietal and visual areas involved in action understanding mediate a cascade of visual-motor processes at different levels of action description from exact movement copies to abstract action goals achieved with different movement styles.
What sustains doctoral students’ interest? Comparison of Finnish, UK and Spanish doctoral students’ perceptions

ABSTRACT Interest plays a major role in the doctoral experience. However, previous research has not considered how the national context might influence interest. This study focused on exploring cross-national variation in doctoral students’ experiences by comparing Finnish, UK and Spanish doctoral students’ research interests. Participants (n = 2.426) responded to the Doctoral Experience survey. Spanish students sustained higher levels of researcher and instrumental interest compared to both UK and Finnish students. Finnish students displayed the lowest levels of instrumental interest while UK students combined the lowest level of development interest with the highest level of cynicism. Interest was determinant for experienced exhaustion, cynicism, study satisfaction and reducing risk of abandonment across the three contexts. Results suggest that national differences in labour market, career expectations or programme structure can be powerful enough to overcome the incredible variation that has been proven to exist at the more local levels of doctoral nested contexts.
Mechanical Behavior and Fracture Properties of NiAl Intermetallic Alloy with Different Copper Contents

The deformation behavior and fracture characteristics of NiAl intermetallic alloy containing 5~7 at% Cu are investigated at room temperature under strain rates ranging from 1 × 10−3 to 5 × 103 s−1. It is shown that the copper contents and strain rate both have a significant effect on the mechanical behavior of the NiAl alloy. Specifically, the flow stress increases with an increasing copper content and strain rate. Moreover, the ductility also improves as the copper content increases. The change in the mechanical response and fracture behavior of the NiAl alloy given a higher copper content is thought to be the result of the precipitation of β-phase (Ni,Cu)Al and γ'-phase (Ni,Cu)3Al in the NiAl matrix.