Miracle-dz/UniFAR-FTUs huggingface dataset:
Column Flotation Modelling and Technology Column Flotation Modelling and Technology

A brief review of the art of column flotation technology is presented. The flotation column characteristics are described, followed by an analysis of the principal variables involved in the process and the impact they have on column performance. Discussion is given of both industrial experience and fundamental studies. Attempts to model and scale-up flotation columns are reviewed with emphasis on the key factors affecting column scale-up, i.e. rate constants, mixing characteristics, particle residence time and carrying capacity. Existing control schemes for flotation columns are discussed, and a summary of column flotation applications is given illustrating the wisdespread use of this technology.
Cohomology of U(2,1) representation varieties of surface groups

In this paper, we use the Morse theory of the Yang–Mills–Higgs functional on the singular space of Higgs bundles on Riemann surfaces to compute the equivariant cohomology of the space of semistable U(2, 1)‐ and SU(2, 1)‐Higgs bundles with fixed Toledo invariant. In the non‐coprime case, this gives new results about the topology of the U(2, 1) and SU(2, 1) character varieties of surface groups. The main results are a calculation of the equivariant Poincaré polynomials, a Kirwan surjectivity theorem in the non‐fixed determinant case, and a description of the action of the Torelli group on the equivariant cohomology of the character variety. This builds on earlier work for stable pairs and rank 2 Higgs bundles.
Ambiguity models and the machina paradoxes

Machina (2009) introduced two examples that falsify Choquet expected utility, presently one of the most popular models of ambiguity. This article shows that Machina's examples falsify not only the model mentioned, but also four other popular models for ambiguity of the literature, namely maxmin expected utility, variational preferences, α-maxmin, and the smooth model of ambiguity aversion. Thus, Machina's examples pose a challenge to most of the present field of ambiguity. Finally, the paper discusses how an alternative representation of ambiguity-averse preferences works to accommodate the Machina paradoxes and what drives the results. (JEL D81)
Emergence of time-asymptotic flocking in a stochastic Cucker-Smale system

Abstract. We study a stochastic Cucker-Smale flocking system in which particles interact with the environment through white noise. We provide the definition of flocking for the stochastic system, and show that when the communication rate is constant, the system exhibits a flocking behavior independent of the initial configurations. For the case of a radially symmetric communication rate with a positive lower bound, we show that the relative fluctuations of the particle velocity around the mean velocity have a uniformly bounded variance in time. We conclude with numerical simulations that validate our analytical results.
Examination of the Risk of Continuous Leflunomide Treatment on the Incidence of Infectious Complications After Joint Arthroplasty in Patients With Rheumatoid Arthritis

Synopsis: To determine whether the risk of infectious complications after total joint arthroplasty is increased in rheumatoid arthritis patients who are treated continuously with leflunomide, the incidences of infectious complications in 41 rheumatoid arthritis patients who received continuous leflunomide treatment (leflunomide group) and in 41 patients who did not receive leflunomide within 4 weeks of surgery (nonleflunomide group) were compared. The incidence (6.1%) of local infection after surgery in the leflunomide group (82 procedures) was slightly lower than that (6.3%) in the nonleflunomide group (79 procedures). There were no systemic or deep infections. None of the other variables analyzed were identified as risk factors for postoperative complications. The results indicate that there is no dramatically increased risk of postoperative infectious complications in rheumatoid arthritis patients who continue to be treated with low doses of leflunomide perioperatively.
H2O Masers in W49 North and Sagittarius B2

Using the Very Large Array (VLA) of the National Radio Astronomy Observatory in the A and B configurations, we have obtained simultaneous high-resolution observations of both the 22 GHz H2O maser lines as well as the 22 GHz continuum for the H II regions W49N and Sagittarius B2. The angular resolution of both observations is ~ 0. ″1, which at the distance of W49N (11.4 kpc) and Sgr B2 (8.5 kpc) corresponds to a physical size of less than 1000 AU in both sources. The velocity coverage for W49N is ±435 km s-1; positions for 316 H2O maser components were obtained. The velocity coverage for Sgr B2 is -40 to +120 km s-1; positions for 68 maser components were determined in Sgr B2 Main, 79 in Sgr B2 North, 14 in Sgr B2 Mid-North, and 17 in Sgr B2 South, for a total of 178 H2O maser positions in Sgr B2. The cross calibration scheme of Reid & Menten was used. Using this procedure, high dynamic range continuum images were obtained with accurate registration (σ ~ 0.″01) of the continuum and maser positions. A detailed comparison between H II components and maser positions for both Sgr B2 and W49N is presented. In Sgr B2 Main, the H2O masers are predominantly located at the outside edge of the high-frequency continuum, lending support to the proposal that entrainment by stellar winds may play an important role in H2O maser emission.
Comovement $ We Thank

Building on Vijh (Rev. Financial Stud. 7 (1994)), we use additions to the S&P 500 to distinguish two views of return comovement: the traditional view, which attributes it to comovement in news about fundamental value, and an alternative view, in which frictions or sentiment delink it from fundamentals. After inclusion, a stock’s beta with the S&P goes up. In bivariate regressions which control for the return of non-S&P stocks, the increase in S&P beta is even larger. These results are generally stronger in more recent data. Our findings cannot easily be explained by the fundamentals-based view and provide new evidence in support of the alternative frictionor sentiment-based view. r 2004 Elsevier B.V. All rights reserved. JEL classification: G12
Autism Blockinscience Blockindigest: Blockinthe Blockinjournal Blockinof Blockinautismone Blockin Blockinissue Blockin03 Blockin Blockinreprinted Blockinwith Blockinpermission

JaMeS NeUBraNDer, MD, is board certified in environmental medicine and is the medical director of two entities. Since the mid-1990s, Dr. Neubrander BLOCKINhas BLOCKINtreated BLOCKIN4000 BLOCKINto BLOCKIN5000 BLOCKINchildren BLOCKINon BLOCKINthe BLOCKINautism BLOCKINspectrum. BLOCKINHe BLOCKINis known BLOCKINas BLOCKINthe BLOCKIN " Father BLOCKINof BLOCKINMethyl-B12 " BLOCKIN and BLOCKINan BLOCKINinnovator BLOCKINof BLOCKINhyperbaric BLOCKINoxygen therapy (HBOT) protocols used to treat children with ASD and other disorders. Please visit www.drneubrander. com. Jay GUNkeLMaN, a QEEG Diplomate, is highly experienced in EEG and QEEG processing. Following his BS in psychology, he became a certified registered electroneurodiagnostic technologist. The first-ever credentialed QEEG Technologist, he has over 30 years of experience in this field. He is a cofounder and the chief science officer of Brain Science International. is a licensed clinical psychologist and a board certified biofeedback and neurofeedback therapist. Dr. Linden has been the director of Attention Learning Centers and Attention Performance Centers since 1988. He has specialized in QEEG assessment and neurofeedback treatment of children, adolescents, and adults with ADD and ASD since 1982.
Strategic initial placement promotes evolution of cooperation on graphs

Population structure and spatial heterogeneity are integral components of evolutionary dynamics and, in particular, of the evolution of cooperation in social dilemmas. Despite the fact that structure can promote the emergence of cooperation in some populations, it can suppress it in others. Thus, a detailed understanding of the influence of population structure is crucial for describing the features that allow cooperative behaviors to spread. Here, we provide a complete description of when selection favors cooperation on regular graphs under birth-death and death-birth updating for any initial configuration. We find that cooperation is never favored for birth-death updating. For death-birth updating, we derive a simple, computationally tractable formula for natural selection to favor cooperation when starting from any given initial configuration. This formula elucidates two important features concerning the emergence of cooperation: (i) the takeover of cooperation can be enhanced by the strategic placement of cooperators, and (ii) adding more cooperators to the initial configuration can sometimes suppress the evolution of cooperation.
On the Dynamic Properties of Rigid-Link Flexible-Joint Parallel Manipulators in the Presence of Type 2 Singularities

Over the past decades, with the large development of parallel manipulators, more attention have been paid to their kinematic, kinetostatic, and dynamic properties, and in particular, to their singularities. Several papers deal with singularity analysis of parallel manipulators 1–13. Most of them present the analysis of singular configurations from a kinematic point of view 1–7 . A lgebraically, a singularity analysis is based on the degeneracy of Jacobian matrices of the mechanical structure, or of the system of reciprocal screws wrenches applied to the platform by the legs. However, it is also known that, when parallel manipulators have type 2 singularities 1, they lose their stiffness and their quality of motion transmission, and thus, their payload capability. Therefore, the singularity zones in the workspace of manipulators may be analyzed not only in terms of kinematic criterions, from the theoretically perfect model of manipulators, but also in terms of kinetostatic approaches 8–13. Moreover, while it is demonstrated using the kinetostatic approach that, when subjected to type 2 singularities parallel manipulators lock up, it has been shown experimentally that, via optimal dynamic control of manipulators, it is possible to pass through these singular zones. Thus, it is evident that singular configurations should also be examined in terms of the dynamic aspects.
Cultural Differences in Cognition: Rosetta Phase I 1, 2 Address Correspondence To

—Cultural differences in cognition are important during multinational commercial, military, and humanitarian operations. The Rosetta Project addresses definition and measurement of key cognitive dimensions. Six potential diagnostic measures related to Analytic–Holistic reasoning were assessed: the Exclusion Task, the Attribution Complexity Scale, the Syllogism Task, Categorization, the Framed Line Test, and the Facial Expression Task. 379 participants’ ages ranged from 17 to 24 years (M = 19.8, SD = 1.4). 64.6% were women; Eastern Asian groups (Japan, Korea, and Taiwan) were assumed to have Holistic reasoning tendencies, and those from a Western group (USA) were assumed to have Analytic tendencies. Participants were recruited from subject pools in psychology using the procedures of each university. Results on the Exclusion and Categorization Tasks confirmed hypothesized differences in Analytic–Holistic reasoning. The Attribution Complexity Scale and the Facial Expression Task identified important differences among the four groups. Outcomes on the final two tasks were confounded by unrelated group differences, making comparisons difficult. Building on this exploratory study, Rosetta Phase II will include additional groups and cognitive tasks. Measures of complex cognition are also incorporated to link findings to the naturalistic contexts.
ADAPTIVE TANGENTIAL INTERPOLATION IN RATIONAL KRYLOV SUBSPACES FOR MIMO MODEL REDUCTION

Model reduction approaches have shown to be powerful techniques in the numerical simulation of very large dynamical systems. The presence of multiple inputs and outputs (MIMO systems), makes the reduction process even more challenging. We consider projection-based approaches where the reduction of complexity is achieved by direct projection of the problem onto a rational Krylov subspace of signiﬁcantly smaller dimension. We present an eﬀective way to treat multiple inputs, by dynamically choosing the next direction vectors to expand the space. We apply the new strategy to the approximation of the transfer matrix function and to the solution of the Lyapunov matrix equation. Numerical results conﬁrm that the new approach is competitive with respect to state-of-the-art methods both in terms of CPU time and memory requirements.
Impacts and Implementation of the Basel Accords: Contrasting Argentina, Brazil, and Chile

ii Acknowledgments To Professor Bill Ascher: Thank you for four years of guidance, good laughs, patience, and enlightenment. You have challenged me, and I am graduating a little bit smarter because of you. To my father: There will never be enough words. Let me just thank you for all those supportive late-night calls, from New York (where it was very early in the morning) to California, to make sure I had not fallen asleep at the computer and that I was still working hard. Now that my thesis is complete, hopefully we can both get a good night's sleep. To Rosabella Magat: You were there to inspire me and to patiently answer all of my questions. You were there all those late nights to help keep me awake, or to unwind from my thesis challenges. You were there for me, and neither my thesis nor my senior year would have been as great without you. To all fellow Poppa Computer Lab users and friends: Thank you for keeping me company and sharing in this experience. It would not have been as enjoyable without you. Abstract This thesis explores the impacts of implementing the Basel Accords on the stability of the banking sector and greater economy, and will particularly focus on Basel II. This study contrasts three Latin American governments that have implemented the Basel Accords. Because Chile's and Brazil's banking sectors have been more successful in implementing the Basel Accords, they will be used as model cases to provide the context to analyze Argentina's banking sector. The results of this thesis reveal that in order for Argentina to stabilize its banking sector and become a stronger international financial player, it must not only improve the implementation of the Basel Accords, but also simultaneously address discrepancies in political agendas and its banking structure.
Visual perception and action in golf putting

VU University Research Institute move is a collaboration between researchers of the Faculty of Human Movement Sciences, VU University Medical Center and the Academic Centre for Dentistry Amsterdam. The research of move is related to human movement and health, with an emphasis on prevention and recovery of injury and disorders of the (neuro-)musculoskeletal system, on optimal recovery of tissue and function, and on motor control and coordination. move aims at fundamental, multidisciplinary and translational research, especially in the fields of (oral) regenerative medicine, rehabilitation and sports. www.move. vu.nl
Coherence in Dense Cores. II. The Transition to Coherence

After studying how line width depends on spatial scale in low-mass star-forming regions, we propose that "dense cores" (Myers & Benson 1983) represent an inner scale of a self-similar process that characterizes larger scale molecular clouds. In the process of coming to this conclusion, we define four distinct types of line width-size relation (Δv∝Rai), which have power-law slopes a1, a2, a3, and a4, as follows: Type 1—multitracer, multicloud intercomparison; Type 2—single-tracer, multicloud intercomparison; Type 3—multitracer study of a single cloud; and Type 4—single-tracer study of a single cloud. Type 1 studies (of which Larson 1981 is the seminal example) are compendia of Type 3 studies which illustrate the range of variation in the line width-size relation from one region to another. Using new measurements of the OH and C18O emission emanating from the environs of several of the dense cores studied in NH3 by Barranco & Goodman (1998; Paper I), we show that line width increases with size outside the cores with a4 ~ 0.2. On scales larger than those traced by C18O or OH,12CO and 13CO observations indicate that a4 increases to ~0.5 (Heyer & Schloerb 1997). By contrast, within the half-power contour of the NH3 emission from the cores, line width is virtually constant, with a4 ~ 0. We interpret the correlation between increasing density and decreasing Type 4 power-law slope as a "transition to coherence. " Our data indicate that the radius Rcoh at which the gas becomes coherent (i.e., a4 → 0) is of order 0.1 pc in regions forming primarily low-mass stars. The value of the nonthermal line width at which "coherence" is established is always less than but still of order of the thermal line width of H2. Thus coherent cores are similar to, but not exactly the same as, isothermal balls of gas. Two other results bolster our proposal that a transition to coherence takes place at ~0.1 pc. First, the OH, C18O, and NH3 maps show that the dependence of column density on size is much steeper (N ∝ R-0.9) inside Rcoh than outside of it (N ∝ R-0.2), which implies that the volume filling factor of coherent cores is much larger than in their surroundings. Second, Larson (1995) has recently found a break in the power law characterizing the clustering of stars in Taurus at 0.04 pc, just inside of Rcoh. Larson and we interpret this break in slope as the point at which stellar clustering properties change from being determined by the (fractal) gas distribution (on scales greater than 0.04 pc) to being determined by fragmentation processes within coherent cores (on scales less than 0.04 pc). We speculate that the transition to coherence takes place when a dissipation threshold for the MHD turbulence that characterizes the larger scale medium is crossed at the critical inner scale Rcoh. We suggest that the most likely explanation for this threshold is the marked decline in the coupling of the magnetic field to gas motions due to a decreased ion/neutral ratio in dense, high filling factor gas.
A Modular Correctness Proof of IEEE 802.11i and SSL/TLS

The IEEE 802.11i wireless networking protocol provides mutual authentication between a network access point and user devices, prior to user connectivity. The protocol consists of several parts, including an 802.1X authentication phase allowing TLS over EAP, the 4-Way Handshake to establish a fresh session key, and an optional Group Key Handshake for group communications. Motivated by previous vulnerabilities in related wireless protocols and changes in 802.11i to provide better security, we carry out a formal proof of correctness using a Protocol Composition Logic previously used for other protocols. The proof is modular, comprising a separate proof for each protocol section and providing insight into the networking environment in which each section can be reliably used. Further, the proof holds for a variety of failure recovery strategies and other implementation and configuration options. Since SSL/TLS is widely used apart from 802.11i, the security proof for SSL/TLS has independent interest.
Running head: ANTICIPATION OF AFFECTIVE IMAGES AND ERD OF ALPHA ACTIVITY

We investigated the event-related power decrease (event-related desynchronization: ERD) of the alpha bands associated with the anticipation of affective images. Participants (n = 19) were presented with emotionally positive or negative images under different anticipatory conditions, and their brain responses were recorded using magnetoencephalography (MEG). In the Affective Cue conditions, the cue stimulus indicated the emotional valence (positive or negative) of the image. In the Null Cue condition, the cue stimulus did not include any information about the valence of the image, and in the No Cue condition, the affective image was presented without a preceding cue. The cues in the affective and null conditions were followed by emotional images. During the anticipation period for the affective image, the alpha ERD preceding an anticipated negative image was larger than that preceding an anticipated positive image; this effect had an occipital dominance. Furthermore, during the anticipation period, the lower-2-alpha ERD of the right frontal area showed the same result. These results demonstrate that anticipation of negative stimuli induced alpha ERD in both the visual and the right frontal cortex, indicating that top-down modulation may be provided by the right frontal cortex to the visual cortex. Section: Cognitive and Behavioral Neuroscience
THE HAUSDORFF MEASURE OF THE INTERSECTION OF SETS OF POSITIVE LEBESGUE MEASURE

Erdos, Kestelman and Rogers [1[ showed that, if A 1 , A 2 ,… is any sequence of Lebesgue measurable subsets of the unit interval [0, 1] each of Lebesgue measure at least η > 0, then there is a subsequence {A ni } ( i = 1, 2,…) such that the intersection contains a perfect subset (and is therefore of power ). They asked for what Hausdorff measure functions φ(t) is it possible to choose the subsequence to make the intersection set ∩A ni of positive φ-measure. In the present note we show that the strongest possible result in this direction is true. This is given by the following theorem.
A Hilltop Settlement during the Migration Period Runsa – a Hilltop Settlement during the Migration Period

Archaeologists have long noted the striking monumentality and large-scale efforts behind the Iron Age hilltop settlements. Yet, because of limited excavations, they represent a controversial part of the Migration Period society and much of their function remains hidden. This paper deals with questions concerning the inner organization and activities that took place within the Iron Age hilltop settlement at Runsa. The study is linked to the ongoing project ”Runsa fornborg – En befäst centralplats i östra Mälardalen under folkvandringstid” which aims to investigate the socio-political functions of Runsa. In an attempt to establish a nuanced picture and distinguish space use within the hilltop settlement, a multi-variable approach is used. Alongside more traditional methods, element analysis by atomic absorption spectrophotometer (AAS) and lipid analysis by gas chromatography-mass spectrometry (GC-MS) is emphasized.
A Framework for Evaluating Regression Test Selection Techniques in Industry

Previous research in the area of regression testing has mainly focused on different techniques used to decrease the size of test suites. However, studies that compare the techniques in authentic industrial contexts are few. Aim: The aim of this paper is to introduce an efficient, purposeful framework meant to evaluate regression test selection techniques using only a limited selection of available information. Method: In order to evaluate and compare different regression testing techniques three realistic and important scenarios were recognized and a framework was developed. This was then utilized as a starting point for an evaluation case study which compared regression test selection techniques. Regression test data was collected from a software developing site within Ericsson. Results: The framework evaluation showed that a well-supported decision could be made regarding which regression testing technique a software development organization should use. The comparative case study also showed that, compared to a random selection, a technique based on historical test data improved the fail detection. Conclusions: The contribution of this paper is the framework which can be used as a basis for further research as well as aid practitioners in the analysis and evaluation of regression test selection techniques.