bluuebunny/crossref_metadata_2025_split huggingface dataset:
Can Investors Detect Managers' Lack of Spontaneity? Adherence to Predetermined Scripts during Earnings Conference Calls
Authors: Lee Joshua 
Published: April 2015

ABSTRACT
This paper examines whether market participants infer negative information about future unexpected firm performance when managers adhere to predetermined scripts when responding to questions during earnings conference calls. I argue that managers respond to questions from prepared scripts to avoid the disclosure of bad news. Using a measure of the adherence to predetermined language, I provide evidence that a lack of spontaneity is negatively associated with the market reaction to the call and with the abnormal returns in the subsequent quarter. I further find that analysts downgrade their forecasts following these calls. I also provide evidence that adherence to predetermined language is negatively associated with future unexpected firm accounting performance, supporting investors' negative response to it. Finally, I find that bid-ask spreads increase and firms are less likely to guide future earnings when managers adhere to the predetermined language of a script, suggesting that firms provide less information, not more, during these calls.
JEL Classifications: G14; M40; M41.
Priority Dissemination of Public Disclosures
Authors: Dong Bei , Li Edward Xuejun , Ramesh K , Shen Min 
Published: April 2015

ABSTRACT
This study examines the unintended effects of a pre-Reg FD practice that gave a broad group of sophisticated market participants 15-minute earlier access to all corporate press releases than the general public. We find that roughly one-eighth of the price discovery to earnings announcements issued during regular trading hours was due to privileged access to information in earnings press releases, with the 15-minute priority dissemination contributing to just over 50 percent of price discovery from all privileged access. In addition, we find that transient institutions benefited from priority dissemination, especially when the earnings contained good news. Finally, consistent with economic theory, we find that intraday bid-ask spreads decreased post-Reg FD for firms that had sufficient market liquidity to allow trading opportunities during the 15-minute window. Our study has implications for current discussions on whether preferential information distribution by firms and information intermediaries creates an uneven playing field among investors.
Data Availability: The data used in this study are available from the public sources identified in the paper
JEL Classifications: D82; G14; K22; M45.
The Kiddie Tax and Scholarship Income: An Analysis of the Unforeseen Tax Consequences Resulting from the Evolution and Execution of IRC 1(g) and a Roadmap for Reform
Authors: Rubenstein Rachael E. , Madison Thomas F. , Royalty Kent W. 
Published: April 2015

ABSTRACT
One of the changes contained in the Tax Reform Act of 1986 is the tax on unearned income of minor children, also known as the “kiddie tax.” We review this tax, its legislative history, the amendments and interpretations that have enlarged its application, and the unintended consequences that resulted from the expansion of the kiddie tax to young adults up to the age of 24, specifically as it applies to taxable scholarship income. Many college students whose higher educations are heavily subsidized by scholarships may face significant tax burdens as a result of the kiddie tax. This reality is not in line with the congressional intent of curtailing tax avoidance through shifting ownership of income-producing assets. We provide examples of the tax's impact, and we conclude by offering potential solutions that protect the public fisc while reducing the negative and unintended consequences created by expansion of the kiddie tax.
Eating Disorders in Girls and Women With Type 1 Diabetes: A Longitudinal Study of Prevalence, Onset, Remission, and Recurrence
Authors: Colton Patricia A. , Olmsted Marion P. , Daneman Denis , Farquhar Jamie C. , Wong Harmonie , Muskat Stephanie , Rodin Gary M. 
Published: April 2015

OBJECTIVE
Girls and women with type 1 diabetes are at increased risk for developing eating disorders (EDs), and these disorders are associated with serious diabetes-related medical complications. This study describes the longitudinal course of disturbed eating behavior (DEB) and EDs in a cohort with type 1 diabetes.

RESEARCH DESIGN AND METHODS
A total of 126 girls with type 1 diabetes receiving care for diabetes at The Hospital for Sick Children in Toronto participated in a series of seven interview-based assessments of ED behavior and psychopathology over a 14-year period, beginning in late childhood. Survival analysis was used.

RESULTS
Mean age was 11.8 ± 1.5 years at time 1 and 23.7 ± 2.1 years at time 7. At time 7, 32.4% (23/71) met the criteria for a current ED, and an additional 8.5% (6/71) had a subthreshold ED. Mean age at ED onset (full syndrome or below the threshold) was 22.6 years (95% CI 21.6–23.5), and the cumulative probability of onset was 60% by age 25 years. The average time between onset of ED and subsequent ED remission was 4.3 years (95% CI 3.1–5.5), and the cumulative probability of remission was 79% by 6 years after onset. The average time between remission of ED and subsequent recurrence was 6.5 years (95% CI 4.4–8.6), and the cumulative probability of recurrence was 53% by 6 years after remission.

CONCLUSIONS
In this longitudinal study, EDs were common and persistent, and new onset of ED was documented well into adulthood. Further research regarding prevention and treatment for this vulnerable group is urgently needed.
Community composition and structure had no effect on forest susceptibility to invasion by the emerald ash borer (Coleoptera: Buprestidae)
Authors: Smith Annemarie , Herms Daniel A. , Long Robert P. , Gandhi Kamal J.K. 
Published: April 2015

AbstractEmerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), is a non-native, wood-boring beetle that has caused widespread mortality of ash (Fraxinus Linnaeus (Oleaceae)) in eastern North America. During 2004–2007, we determined whether forest community composition and structure of black (F. nigra Marshall), green (F. pennsylvanica Marshall), and white (F. americana Linnaeus) ash stands influenced their susceptibility to EAB invasion in southeast Michigan, United States of America. There was no relationship between EAB-induced ash decline or percentage mortality and any measure of community composition (tree species diversity, stand/ash density, total basal area, or relative dominance of ash). There was also no relationship between measures of EAB impact (density of EAB signs, ash decline rating, percentage ash mortality, or percentage infested ash) and forest attributes (ash/total stand density, basal area, ash importance, or stand diversity). Decline and mortality of black ash advanced more rapidly than that of white and green ash. Percentage mortality of ash increased from 51% to 93% during 2004–2007. Distance from the epicentre of the invasion was negatively correlated with ash mortality, but this relationship dissipated over time. Stand composition data suggests that ash will be replaced by Quercus Linnaeus (Fagaceae), Acer Linnaeus (Sapindaceae), and Tilia Linnaeus (Malvaceae); such vegetation changes will irreversibly alter the structure and function of these forests.
Critical Role for IL-18 in Spontaneous Lung Inflammation Caused by Autophagy Deficiency
Authors: Abdel Fattah Elmoataz , Bhattacharya Abhisek , Herron Alan , Safdar Zeenat , Eissa N. Tony 
Published: April 2015

Abstract
Autophagy is an important component of the immune response. However, the functions of autophagy in human diseases are much less understood. We studied biological consequences of autophagy deficiency in mice lacking the essential autophagy gene Atg7 or Atg5 in myeloid cells. Surprisingly, these mice presented with spontaneous sterile lung inflammation, characterized by marked recruitment of inflammatory cells, submucosal thickening, goblet cell metaplasia, and increased collagen content. Lung inflammation was associated with increase in several proinflammatory cytokines in the bronchoalveolar lavage and in serum. This inflammation was largely driven by IL-18 as a result of constitutive inflammasome activation. Following i.p. LPS injection, autophagy-deficient mice had higher levels of proinflammatory cytokines in lungs and in serum, as well as increased mortality, than control mice. Intranasal bleomycin challenge exacerbated lung inflammation in autophagy-deficient mice and produced more severe fibrotic changes than in control mice. These results uncover a new and important role for autophagy as negative regulator of lung inflammation.
Prognostic significance of cell surface phenotype in acute lymphoblastic leukemia
Authors: Aziz Shiek Aejaz , Sharma Susheel Kumar , Sabah Iram , Jan M Aleem 
Published: April 2015

Abstract
Context: To find out the phenotypic character of lymphoblasts of acute lymphoblastic leukemia (ALL) patients in our study cohort and their possible effect on the prognosis. Aims: To investigate the phenotype in ALL in our demographic population and to prognosticate various upfront current protocols employed in our hospital. Settings and Design: The study spanned over a period of 4 years with retrospective and prospective data of January 2008 through December 2011. Materials and Methods: 159 patients of all age groups were enrolled for the study, of which flow cytometry was done in 144 patients. Statistical Analysis Used: Analysis was done using the variables on SPSS (statistical package for social sciences) software on computer. Survival curves were estimated by method of Kaplan-Meir. Results: Majority of the patients were of B-cell (68.1%) and 30.6% patients were of T-cell lineage. Of these, 80.6% patients were having cALLa positivity. Complete remission (CR) was achieved in 59.1%, 16.4% relapsed, and 20.1% patients died. Conclusions: Phenotyping has become an important and integral part of diagnosis, classification, management and prognosticating in ALL. B-cell has been found to have a better survival over T-cell lymphoblastic leukemia. cALLa antigen positivity has good impact in achieving CR in only B-cell lineage, myeloid coexpression has no significant effect on the outcome. BFM (Berlin-Frankfurt-Münster) based protocols though showed a higher CR and survival vis-a-vis UKALL-XII. However, patients enrolled in former group being of low risk category and lesser in numbers cannot be compared statistically with a fair degree of confidence.
Concise Review: New Insights Into the Role of Macrophages in β-Cell Proliferation
Authors: Xiao Xiangwei , Gittes George K. 
Published: April 2015

Abstract

Diabetes mellitus can potentially be treated with islet transplantation, but additional sources of β cells are necessary to overcome the short supply of donor pancreases. Although controversy still exists, it is generally believed that the postnatal expansion of the β-cell mass is mainly through pre-existing β-cell replication. Thus, understanding the molecular mechanisms underlying the regulation of β-cell proliferation might lead to clinical strategies for increasing β-cell numbers, both in vitro and in vivo. Macrophages have a well-recognized role in the development of insulitis as part of the pathogenesis of type 1 diabetes. However, a potential role for macrophage polarization, triggered by specific environmental stimuli, in promoting β-cell proliferation has only recently been appreciated. In the present review, we discuss several independent studies, using different regeneration models, that demonstrate a substantial inductive role for macrophages in β-cell proliferation. Additional dissection of the involved cell-cell crosstalk through specific signal transduction pathways is expected to improve our understanding of β-cell proliferation and might facilitate the current β-cell replacement therapy.

Significance
New independent findings from different β-cell regeneration models, contributed by different research groups, have provided compelling evidence to highlight a previously unappreciated role for macrophages in β-cell proliferation. Additional dissection of the underlying mechanisms and cell-cell crosstalk might shed new light on strategies to increase the functional β-cell mass in vivo and on β-cell replacement therapies.
The impacts of heterogeneous land surface fluxes on the diurnal cycle precipitation: A framework for improving the GCM representation of land‐atmosphere interactions
Authors: Wu Chien‐Ming , Lo Min‐Hui , Chen Wei‐Ting , Lu Chia‐Tsung 
Published: April 2015

AbstractThe present study aims to investigate the modulation of the diurnal cycle precipitation by heterogeneous land surface fluxes. By combining the National Center for Atmospheric Research Community Land Model (CLM) and vector vorticity equation cloud‐resolving model (VVM), experiments are designed to understand the responses of diurnal convection to heterogeneous land surface forcings of various spatial scales and intensities. To delineate the land‐atmosphere interactions, a two‐step off‐line approach is adopted. First, the CLM is driven by observational atmospheric forcing with different characteristic length scales and magnitudes. While the surface fluxes from the CLM show no significant difference in the domain‐averaged values, their spatial distribution responds significantly to the precipitation heterogeneity. In the second step, the derived CLM surface fluxes are used to drive the VVM. Results show that the timing of precipitation accelerates with increasing magnitude of surface flux perturbation, while the mean and diurnal ranges of precipitation roughly remain the same. The larger perturbation magnitude enhances the boundary layer vertical kinetic energy, which advances the development of the boundary layer. On the other hand, the mean and diurnal ranges of precipitation increase significantly, and the timing of initial precipitation delays with increasing perturbation length scale. The inland breeze induced by the large patches of surface fluxes tends to enhance the mesoscale organization of deep convection, hence the stronger precipitation. The present results highlight the importance of taking heterogeneous land surface fluxes into consideration in future development of general circulation model convection parameterizations associated with land and atmosphere interactions.
Greenland 2012 melt event effects on CryoSat‐2 radar altimetry
Authors: Nilsson Johan , Vallelonga Paul , Simonsen Sebastian B. , Sørensen Louise Sandberg , Forsberg René , Dahl‐Jensen Dorthe , Hirabayashi Motohiro , Goto‐Azuma Kumiko , Hvidberg Christine S. , Kjær Helle A. , Satow Kazuhide 
Published: April 2015

AbstractCryoSat‐2 data are used to study elevation changes over an area in the interior part of the Greenland Ice Sheet during the extreme melt event in July 2012. The penetration of the radar signal into dry snow depends heavily on the snow stratigraphy, and the rapid formation of refrozen ice layers can bias the surface elevations obtained from radar altimetry. We investigate the change in CryoSat‐2 waveforms and elevation estimates over the melt event and interpret the findings by comparing in situ surface and snow pit observations from the North Greenland Eemian Ice Drilling Project camp. The investigation shows a major transition of scattering properties around the area, and an apparent elevation increase of 56 ± 26 cm is observed in reprocessed CryoSat‐2 data. We suggest that this jump in elevation can be explained by the formation of a refrozen melt layer that raised the reflective surface, introducing a positive elevation bias.
Seasonal reversal of the influence of El Niño–Southern Oscillation on very large wildfire occurrence in the interior northwestern United States
Authors: Barbero Renaud , Abatzoglou John T. , Brown Timothy J. 
Published: April 2015

AbstractSatellite‐mapped fire perimeters and the multivariate El Niño–Southern Oscillation index were used to examine the impact of concurrent El Niño–Southern Oscillation (ENSO) phase on very large fire (VLF) occurrences over the intermountain northwestern United States (U.S.) from 1984 to 2012. While the warm phase of ENSO promotes drier and warmer than normal conditions across the region during winter and spring that favor widespread fire activity the following summer, a reduction in VLFs was found during the warm phase of ENSO during summer concurrent with the fire season. This paradox is primarily tied to an anomalous upper level trough over the western U.S. and positive anomalies in integrated water vapor that extend over the northwestern U.S. during summers when the warm phase of ENSO is present. Collectively, these features result in widespread increases in precipitation amount during the summer and a curtailment of periods of critically low‐fuel moistures that can carry wildfire.
Electron precipitation from EMIC waves: A case study from 31 May 2013
Authors: Clilverd Mark A. , Duthie Roger , Hardman Rachael , Hendry Aaron T. , Rodger Craig J. , Raita Tero , Engebretson Mark , Lessard Marc R. , Danskin Donald , Milling David K. 
Published: April 2015

AbstractOn 31 May 2013 several rising tone electromagnetic ion cyclotron (EMIC) waves with intervals of pulsations of diminishing periods were observed in the magnetic local time afternoon and evening sectors during the onset of a moderate/large geomagnetic storm. The waves were sequentially observed in Finland, Antarctica, and western Canada. Coincident electron precipitation by a network of ground‐based Antarctic Arctic Radiation‐belt Dynamic Deposition VLF Atmospheric Research Konsortia and riometer instruments, as well as the Polar‐orbiting Operational Environmental Satellite (POES) electron telescopes, was also observed. At the same time, POES detected 30–80 keV proton precipitation drifting westward at locations that were consistent with the ground‐based observations, indicating substorm injection. Through detailed modeling of the combination of ground and satellite observations, the characteristics of the EMIC‐induced electron precipitation were identified as latitudinal width of 2–3° or ΔL = 1 Re, longitudinal width ~50° or 3 h magnetic local time, lower cutoff energy 280 keV, typical flux 1 × 104 el cm−2 sr−1 s−1 > 300 keV. The lower cutoff energy of the most clearly defined EMIC rising tone in this study confirms the identification of a class of EMIC‐induced precipitation events with unexpectedly low‐energy cutoffs of <400 keV.
Very oblique whistler generation by low‐energy electron streams
Authors: Mourenas D. , Artemyev A. V. , Agapitov O. V. , Krasnoselskikh V. , Mozer F. S. 
Published: April 2015

AbstractWhistler mode chorus waves are present throughout the Earth's outer radiation belt as well as at larger distances from our planet. While the generation mechanisms of parallel lower band chorus waves and oblique upper band chorus waves have been identified and checked in various instances, the statistically significant presence in recent satellite observations of very oblique lower band chorus waves near the resonance cone angle remains to be explained. Here we discuss two possible generation mechanisms for such waves. The first one is based on Landau resonance with sporadic very low energy (<4 keV) electron beams either injected from the plasma sheet or produced in situ. The second one relies on cyclotron resonance with low‐energy electron streams, such that their velocity distribution possesses both a significant temperature anisotropy above 3–4 keV and a plateau or heavy tail in parallel velocities at lower energies encompassing simultaneous Landau resonance with the same waves. The corresponding frequency and wave normal angle distributions of the generated very oblique lower band chorus waves, as well as their frequency sweep rate, are evaluated analytically and compared with satellite observations, showing a reasonable agreement.
New Integral Antiwindup Scheme for PI Motor Speed Control
Authors: Hoo C. L. , Haris Sallehuddin Mohamed , Chung Edwin C. Y. , Nik Mohamed Nik Abdullah 
Published: April 2015

AbstractWindup refers to the phenomenon where a control system operates in a nonlinear region when the controller's output exceeds the input limits of the plant being controlled. Windup can lead to performance degradation in terms of overshoot, settling time and even system stability. Many anti‐windup strategies involve switching and manipulating the integral control component in various ways when saturation occurs aiming to bring control back into the linear region. For better insight into windup, the proportional–integral (PI) plane is now used as a means to explain the phenomenon in terms of the controller's signals. A PI controller with a built‐in closed‐loop integral controller that has a reference set based on the input command and external torque is proposed. The performance for this proposed method is compared against existing conditional integration, tracking back calculation and integral state prediction schemes on second and third order systems using MATLAB/SIMULINK simulations of an induction motor and a DC motor respectively. The proposed controller showed promising potential with its ability to eliminate overshoot in both no load and full load conditions due to the decoupling of its parameters from its response and has the shortest settling time when compared against existing schemes, even in the presence of noise.
Vehicle–pedestrian interaction for mixed traffic simulation
Authors: Chao Qianwen , Deng Zhigang , Jin Xiaogang 
Published: April 2015

AbstractSimulation of real‐world traffic scenarios is widely needed in virtual environments. Different from many previous works on simulating vehicles or pedestrians separately, our approach aims to capture the realistic process of vehicle–pedestrian interaction for mixed traffic simulation. We model a decision‐making process for their interaction based on a gap acceptance judging criterion and then design a novel environmental feedback mechanism for both vehicles' and pedestrians' behavior‐control models to drive their motions. We demonstrate that our proposed method can soundly model vehicle–pedestrian interaction behaviors in a realistic and efficient manner and is convenient to be plugged into various traffic simulation systems. Copyright © 2015 John Wiley & Sons, Ltd.
Real‐time haptic manipulation and cutting of hybrid soft tissue models by extended position‐based dynamics
Authors: Pan Junjun , Bai Junxuan , Zhao Xin , Hao Aimin , Qin Hong 
Published: April 2015

AbstractThis paper systematically describes an interactive dissection approach for hybrid soft tissue models governed by extended position‐based dynamics. Our framework makes use of a hybrid geometric model comprising both surface and volumetric meshes. The fine surface triangular mesh with high‐precision geometric structure and texture at the detailed level is employed to represent the exterior structure of soft tissue models. Meanwhile, the interior structure of soft tissues is constructed by coarser tetrahedral mesh, which is also employed as physical model participating in dynamic simulation. The less details of interior structure can effectively reduce the computational cost during simulation. For physical deformation, we design and implement an extended position‐based dynamics approach that supports topology modification and material heterogeneities of soft tissue. Besides stretching and volume conservation constraints, it enforces the energy preserving constraints, which take the different spring stiffness of material into account and improve the visual performance of soft tissue deformation. Furthermore, we develop mechanical modeling of dissection behavior and analyze the system stability. The experimental results have shown that our approach affords real‐time and robust cutting without sacrificing realistic visual performance. Our novel dissection technique has already been integrated into a virtual reality‐based laparoscopic surgery simulator. Copyright © 2015 John Wiley & Sons, Ltd.