bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rational Points of Some Elliptic Curves Related to the Tilings of the Equilateral Triangle
Authors: Laczkovich Miklós 
Published: October 2019

Abstract
Let n be a positive and squarefree integer. We show that the equilateral triangle can be dissected into $$n\cdot k^2$$

n
·

k
2

congruent triangles for some k if and only if $$n\le 3$$

n
≤
3

, or at least one of the curves $$C_n :y^2 =x(x-n)(x+3n)$$

C
n

:

y
2

=
x

(
x
-
n
)

(
x
+
3
n
)

and $$C_{-n} : y^2 =x(x+n)(x-3n)$$

C

-
n

:

y
2

=
x

(
x
+
n
)

(
x
-
3
n
)

has a rational point with $$y\ne 0$$

y
≠
0

. We prove that if p is a positive prime such that $$p\equiv 7$$

p
≡
7

(mod 24), then $$C_p$$

C
p

and $$C_{-p}$$

C

-
p

do not have such points. Consequently, for these primes the equilateral triangle cannot be dissected into $$p\cdot k^2$$

p
·

k
2

congruent triangles for any k.
Primate thanatology and hominoid mortuary archeology
Authors: Pettitt Paul , Anderson James R. 
Published: October 2019

AbstractIn recent years, a thanatology of primates has become a respectable research topic, and although still sparse, observations among several taxa have shown how complex responses to the dead can be. In human evolutionary archeology, re-analysis of old ‘burial’ sites is slowly revising our view on the development of specifically human responses to the dead. We propose here the means of integrating information from the two disciplines of primatology and archeology, in support of the field of primate thanatology. We propose a terminology and a shared set of research questions, from which we generate a number of observations that can be utilized in the field, in order to establish a working dialogue and foster greater collaboration across the two disciplines.
Activation of the Normal Human Skin Cells by a Portable Dielectric Barrier Discharge-Based Reaction-Discharge System of a Defined Gas Temperature
Authors: Dzimitrowicz Anna , Bielawska-Pohl Aleksandra , Jamroz Piotr , Dora Jerzy , Krawczenko Agnieszka , Busco Giovanni , Grillon Catherine , Kieda Claudine , Klimczak Aleksandra , Terefinko Dominik , Baszczynska Aleksandra , Pohl Pawel 
Published: October 2019

AbstractSkin injury leading to chronic wounds is of high interest due to the increasing number of patients suffering from this symptom. Proliferation, migration, and angiogenesis are key factors in the wound healing processes. For that reason, controlled promotion of these processes is required. In this work, we present the portable helium-dielectric barrier discharge (He-DBD)-based reaction-discharge system of controlled gas temperature for biological activities. To make this He-DBD-based reaction-discharge system safe for biological purposes, a multivariate optimization of the operating parameters was performed. To evaluate the effect of the He-DBD operating parameters on the rotational gas temperature Trot(OH), a design of experiment followed by a Response Surface Methodology was applied. Based on the suggested statistical model, the optimal operating conditions under which the Trot(OH) is less than 37 °C (310 K) were estimated. Then, the resulted model was validated in order to confirm its accuracy. After estimation the optical operating conditions of He-DBD operation, the spectroscopic characteristic of the He-DBD-based reaction-discharge system in relevance to the several optical temperatures in addition to electron number density has been carried out. Additionally, the qualitative and quantitative analyses of the reactive oxygen species and reactive nitrogen species were performed in order to investigate of reactions and processes running in the He-DBD-gaseous phase and in the He-DBD-treated liquid. Next, the developed portable He-DBD-based reaction-discharge system, working under the optimal operating conditions, was used to stimulate the wound healing process. It was found that a 30 s He-DBD treatment significantly increased the proliferation, migration, and angiogenesis of keratinocytes (HaCaT) and fibroblasts (MSU-1.1) cell lines, as well as human skin microvascular endothelial cells (HSkMEC.2). Hence, the application of the cold atmospheric pressure plasma generated in this He-DBD-based reaction-discharge system might be an alternative therapy for patient suffering from chronic wounds.
An Overview of Novel Unconventional Mechanisms of Hematopoietic Development and Regulators of Hematopoiesis – a Roadmap for Future Investigations
Authors: Bujko Kamila , Cymer Monika , Adamiak Mateusz , Ratajczak Mariusz Z. 
Published: October 2019

AbstractHematopoietic stem cells (HSCs) are the best-characterized stem cells in adult tissues. Nevertheless, as of today, many open questions remain. First, what is the phenotype of the most primitive “pre-HSC” able to undergo asymmetric divisions during ex vivo expansion that gives rise to HSC for all hemato-lymphopoietic lineages. Next, most routine in vitro assays designed to study HSC specification into hematopoietic progenitor cells (HPCs) for major hematopoietic lineages are based on a limited number of peptide-based growth factors and cytokines, neglecting the involvement of several other regulators that are endowed with hematopoietic activity. Examples include many hormones, such as pituitary gonadotropins, gonadal sex hormones, IGF-1, and thyroid hormones, as well as bioactive phosphosphingolipids and extracellular nucleotides (EXNs). Moreover, in addition to regulation by stromal-derived factor 1 (SDF-1), trafficking of these cells during mobilization or homing after transplantation is also regulated by bioactive phosphosphingolipids, EXNs, and three ancient proteolytic cascades, the complement cascade (ComC), the coagulation cascade (CoA), and the fibrinolytic cascade (FibC). Finally, it has emerged that bone marrow responds by “sterile inflammation” to signals sent from damaged organs and tissues, systemic stress, strenuous exercise, gut microbiota, and the administration of certain drugs. This review will address the involvement of these unconventional regulators and present a broader picture of hematopoiesis.
Does apologizing work? An empirical test of the conventional wisdom
Authors: HANANIA RICHARD 
Published: October 2019

AbstractPublic figures often apologize after making controversial statements. There are reasons to believe, however, that apologizing makes public figures appear weak and risk averse, which may make them less likeable and lead members of the public to want to punish them. This paper presents the results of an experiment in which respondents were given two versions of two real-life controversies involving public figures. Approximately half of the participants read a story that made it appear as if the person had apologized, while the rest were led to believe that the individual had stood firm. In the first experiment, hearing that Rand Paul apologized for his comments on civil rights did not change whether respondents were less likely to vote for him. When presented with two versions of the controversy surrounding Larry Summers and his comments about women scientists and engineers, however, liberals and females were more likely to say that he should have faced negative consequences for his statement when presented with his apology. The effects on other groups were smaller or neutral. The evidence suggests that when a prominent figure apologizes for a controversial statement, individuals are either unaffected or become more likely to desire that the individual be punished.
Hurricane Impact on Emergency Services and Use of Telehealth to Support Prehospital Care
Authors: French David M. , Hall Greg A. , McGeorge Todd , Haschker Michael , Brazeal Joseph G. , Dubose-Morris Ragan 
Published: October 2019

ABSTRACTThe impact of hurricanes on emergency services is well-known. Recent history demonstrates the need for prehospital and emergency department coordination to serve communities during evacuation, storm duration, and cleanup. The use of telehealth applications may enhance this coordination while lessening the impact on health-care systems. These applications can address triage, stabilization, and diversion and may be provided in collaboration with state and local emergency management operations through various shelters, as well as during other emergency medical responses.
Does Blind Tasting Work? Another Look
Authors: Capehart Kevin W. 
Published: October 2019

AbstractA study entitled “Does Blind Tasting Work? Investigating the Impact of Training on Blind Tasting Accuracy and Wine Preference,” published in the Proceedings issues of this journal, analyzed the effects of training on blind wine tasting accuracy (Wang and Prešern, 2018). I point out two issues with that study and reanalyze their data. I find that the effects of training on accuracy are small, even without controlling for self-selection bias that may produce upwardly biased estimates. To the extent training works, it does not seem to work well and it may only work as a selection device. (JEL Classifications: C91, D83, L66)
NVMEROSVS HORATIVS?
Authors: Woodman A.J. 
Published: October 2019

One of the most famous inscriptions to have survived from ancient Rome is the acta of the Ludi Saeculares of 17 b.c. (CIL 6.32323 = ILS 5050), and one of the most evocative of all epigraphic sentences occupies a line to itself (149): Carmen composuit Q. Horatius Flaccus. This reference to the author of the Carmen Saeculare, says Fraenkel, ‘was the result of a carefully considered decision of the highest authorities’. The degree of careful consideration is initially evident from the prominent positioning of the poet's name directly above those of Augustus and Agrippa in the following line. It will also be noticed that the sentence concludes with a clausula (cretic + spondee) which is one of Cicero's favourites. A further refinement emerges, however, if the poet's name is spelled out in full, something precluded by the naming conventions of the inscription:Cārmēn cōmpŏsŭīt ´ Quīntŭs Hŏrātĭūs | Flaccus.The inscribed sentence incorporates an Asclepiad line, the ‘signature’ metre of Odes 1–3, which are framed by Horace's only two poems in stichic Asclepiads. In identifying the author of the Carmen Saeculare, the sentence also acknowledges the collection of poems which won him the commission.
Conservation status of the dhole Cuon alpinus in north-east India, with a focus on Dampa Tiger Reserve, Mizoram
Authors: Singh Priya , Srivathsa Arjun , Macdonald David W. 
Published: October 2019

AbstractDespite the efforts invested in their conservation, the status of many threatened carnivores in key conservation landscapes remains unknown. The dhole Cuon alpinus is an Endangered social carnivore whose geographical range has contracted by c. 80% since the early 20th century. North-east India is a critical link between South Asian and South-east Asian dhole populations. In this study we compiled presence records of dholes across north-east India, from multiple sources. We also conducted camera-trap surveys in one part of this region, Dampa Tiger Reserve in the state of Mizoram. We examined the influence of ecological and management factors on fine-scale site-use by dholes in Dampa Tiger Reserve, showing a positive association of dhole site-use with sambar Rusa unicolor encounters, distance to the forest boundary and presence of forest department personnel, underscoring the importance of prey and protection. Our findings also highlight the need for targeted, multi-scale assessments of dhole ecology across other sites in north-east India.
Mill's Evolutionary Theory of Justice: Reflections on Persky
Authors: Turner Piers Norris 
Published: October 2019

AbstractJoseph Persky's excellent book, The Political Economy of Progress: John Stuart Mill and Modern Radicalism, shows that J. S. Mill's support for socialism is a carefully considered element of his political and economic reform agenda. The key thought underlying Persky's argument is that Mill has an ‘evolutionary theory of justice’, according to which the set of institutions and practices that are appropriate to one state of society should give way to a new set of institutions as circumstances change and the people themselves improve. However, Persky does not spend a great deal of time discussing Mill's theory of reform, in particular the principles he believes should guide our reform efforts. Reflecting on these principles – notably his principle of impartiality or equal treatment – shows the consistency of Mill's thought over time.
Short food supply chains, labor productivity and fair earnings: an impossible equation?
Authors: Mundler Patrick , Jean-Gagnon Jennifer 
Published: October 2019

AbstractGiven the limited number of middlemen in short food supply chains, producers marketing through such channels must carry out various tasks associated with production, processing (if applicable) and marketing. Since productivity increases with specialization, it is presumably difficult for such producers to achieve high levels of labor productivity in each of the tasks they perform (in terms of organizing the work and controlling for costs). This study reports on the results of a detailed analysis of the apparent labor productivity in each activity segment (production, processing and distribution) on farms in Quebec (Canada) that market through short food supply chains. We adapted the concept of a complex activity system and the Work Assessment method to reflect the context in Quebec and the unique features of integrated farming models based on direct marketing. In total, we analyzed work organization on 32 Quebec farms to determine how added value and work hours are allocated among different activity segments. Our analysis of apparent labor productivity highlights the heterogeneity of farms involved in direct marketing as every farm studied had a unique profile. In addition, work patterns reflected the background, choices and skillsets of farmers and different combinations of production factors were utilized. Overall, labor productivity was lower in production-related tasks, although this was often offset by higher productivity levels in other activity segments. Our results indicate that greater productivity in the areas of processing or distribution allows farms in short food supply chains to be financially sustainable. The findings of our study also confirm that farmers involved in direct marketing work hard to sustain their activity systems, even though net earnings are often low when compared to the amount of effort involved. However, farmers are partially compensated in other ways, such as through client appreciation and work enjoyment.
The Effect of Parietal and Cerebellar Transcranial Direct Current	Stimulation on Bimanual Coordinated Adaptive Motor Learning
Authors: Azarpaikan Atefeh , Taherii Torbati Hamid Reza , Sohrabi Mehdi , Boostani Reza , Ghoshuni Majid 
Published: October 2019

Abstract. Many daily activities, such as typing, eating, playing the piano, and passing the ball in volleyball, require the proficient coordination of both hands. In this study, the effects of anodal transcranial direct current stimulation (atDCS) on the acquisition, retention, and transfer of bimanual adaptive motor tasks were investigated. To this end, 64 volunteers ( Mage = 24.36 years; SD = 2.51; 16 females) participated in this double-blind study and were categorized randomly into 4 groups. During the pretest, posttest, 24-h and 48-h retention, and transfer tests, two forms of bimanual coordination (BC) of the Vienna test system were performed. Between the pretest and posttest, all participants were trained in a bimanual coordination adaptive task with concurrent brain stimulation (1.5 mA for 15 min) for two consecutive days. The first experimental group (parietal-stim) received atDCS over the right parietal cortex (P4), while the second experimental group (cerebellar-stim) received atDCS over the bilateral cerebellum (2.5 cm bilateral to the inion). The third group (sham) received a sham stimulation. Finally, the control group did not receive any stimulation at all (control). Repeated-measure analysis of variance (ANOVARM) results indicated that parietal tDCS affected motor performance in the posttest, while overall mean duration and overall error mean duration of movement decreased. The results also revealed a significant impact of cerebellar tDCS on the posttest, 24-h and 48-h retention, and transfer tests. The overall mean duration and overall error mean durations of movement in this group were significantly lower than those in the other groups. Accordingly, we found evidence that atDCS over the cerebellum leads to more improvement in motor performance and transfer in a bimanual coordination task than atDCS over the right parietal. Finally, these results point to the possibly beneficial application of atDCS for learning and recovery of bimanual motor skills, especially when subjects are faced with a new challenging situation.
The Subsurface Mode Tropical Instability Waves in the Equatorial Pacific Ocean and Their Impacts on Shear and Mixing
Authors: Liu Chuanyu , Fang Liyuan , Köhl Armin , Liu Zhiyu , Smyth William D. , Wang Fan 
Published: October 2019

AbstractThe tropical instability waves (TIWs) in the eastern tropical Pacific have generally been considered as surface‐intensified structures resembling the first baroclinic mode. Here, we report on the existence of subsurface‐intensified TIWs on the equator. These TIWs are primarily manifested in zonal velocities, inducing maximum velocity oscillations at 70–90 m depth with amplitudes of 0.1–0.2 m/s and periods of 5–20 days. They account for ~20% of the variance at 5‐ to 30‐day periods, with another ~50% being contributed by the surface‐intensified TIWs. These waves are most significant during the TIW seasons; they are energized in part by barotropic instabilities and usually last for 3–7 months. Via interacting with the mean flow, they can induce strong out‐of‐phase shear changes between ~50‐m depth and just above the Equatorial Undercurrent core and may lead to complex diapycnal mixing structures. Their horizontal structures, generation mechanism(s), and large‐scale impacts remain to be disclosed.
Energetic Oxygen and Sulfur Charge States in the Outer Jovian Magnetosphere: Insights From the Cassini Jupiter Flyby
Authors: Allen R. C. , Paranicas C. P. , Bagenal F. , Vines S. K. , Hamilton D. C. , Allegrini F. , Clark G. , Delamere P. A. , Kim T. K. , Krimigis S. M. , Mitchell D. G. , Smith T. H. , Wilson R. J. 
Published: October 2019

AbstractOn 10 January 2001, Cassini briefly entered into the magnetosphere of Jupiter, en route to Saturn. During this excursion into the Jovian magnetosphere, the Cassini Magnetosphere Imaging Instrument/Charge‐Energy‐Mass Spectrometer detected oxygen and sulfur ions. While Charge‐Energy‐Mass Spectrometer can distinguish between oxygen and sulfur charge states directly, only 95.9 ± 2.9 keV/e ions were sampled during this interval, allowing for a long time integration of the tenuous outer magnetospheric (~200 RJ) plasma at one energy. For this brief interval for the 95.9 keV/e ions, 96% of oxygen ions were O+, with the other 4% as O2+, while 25% of the energetic sulfur ions were S+, 42% S2+, and 33% S3+. The S2+/O+ flux ratio was observed to be 0.35 (±0.06 Poisson error).
Ocean Biogeochemistry Control on the Marine Emissions of Brominated Very Short‐Lived Ozone‐Depleting Substances: A Machine‐Learning Approach
Authors: Wang Siyuan , Kinnison Douglas , Montzka Stephen A. , Apel Eric C. , Hornbrook Rebecca S. , Hills Alan J. , Blake Donald R. , Barletta Barbara , Meinardi Simone , Sweeney Colm , Moore Fred , Long Matthew , Saiz‐Lopez Alfonso , Fernandez Rafael Pedro , Tilmes Simone , Emmons Louisa K. , Lamarque Jean‐François 
Published: October 2019

AbstractHalogenated very short lived substances (VSLS) affect the ozone budget in the atmosphere. Brominated VSLS are naturally emitted from the ocean, and current oceanic emission inventories vary dramatically. We present a new global oceanic emission inventory of Br‐VSLS (bromoform and dibromomethane), considering the physical forcing in the ocean and the atmosphere, as well as the ocean biogeochemistry control. A data‐oriented machine‐learning emulator was developed to couple the air‐sea exchange with the ocean biogeochemistry. The predicted surface seawater concentrations and the surface atmospheric mixing ratios of Br‐VSLS are evaluated with long‐term, global‐scale observations; and the predicted vertical distributions of Br‐VSLS are compared to the global airborne observations in both boreal summer and winter. The global marine emissions of bromoform and dibromomethane are estimated to be 385 and 54 Gg Br per year, respectively. The new oceanic emission inventory of Br‐VSLS is more skillful than the widely used top‐down approaches for representing the seasonal/spatial variations and the annual means of atmospheric concentrations. The new approach improves the model predictability for the coupled Earth system model and can be used as a basis for investigating the past and future ocean emissions and feedbacks under climate change. This model framework can be used to calculate the bidirectional oceanic fluxes for other compounds of interest.
Robust Predictive Design of Field Measurements for Evapotranspiration Barriers Using Universal Multiple linear Regression
Authors: Clutter Melissa , Ferré Ty P. A. , Zhang Zhuanfang Fred , Gupta Hoshin 
Published: October 2019

AbstractSurface barriers are commonly installed to reduce downward water movement into contaminated zones. Specifically, evapotranspiration (ET) barriers are used to store water and release it, via ET, before it can percolate into an underlying waste zone. To assess the effectiveness of a surface barrier, we used an existing data set, model‐simulated data, and a dimensionality reduction approach called universal multiple linear regression (uMLR) to optimize the required number of sensors in a 2‐m thick surface barrier. To understand the usefulness of implementing predictive uMLR to accommodate multiple monitoring objectives, we compare several network designs, selected based on down‐sampling of existing data, with a recommended sensor design based on model simulations performed without consideration of existing data. We also added consideration of “fuzzy” design, which allows more practical guidelines for field implementation of uMLR. We found that uMLR, combined with robust decision‐making, provides a simple, flexible, and high‐quality network design for monitoring the total water stored in a surface barrier across multiple uncertain conditions.
Barium Chemosensors with Dry-Phase Fluorescence for Neutrinoless Double Beta Decay
Authors: Thapa P. , Arnquist I. , Byrnes N. , Denisenko A. A. , Foss F. W. , Jones B. J. P. , McDonald A. D. , Nygren D. R. , Woodruff K. 
Published: October 2019

AbstractThe nature of the neutrino is one of the major open questions in experimental nuclear and particle physics. The most sensitive known method to establish the Majorana nature of the neutrino is detection of the ultra-rare process of neutrinoless double beta decay. However, identification of one or a handful of decay events within a large mass of candidate isotope, without obfuscation by backgrounds is a formidable experimental challenge. One hypothetical method for achieving ultra- low-background neutrinoless double beta decay sensitivity is the detection of single 136Ba ions produced in the decay of 136Xe (“barium tagging”). To implement such a method, a single-ion-sensitive barium detector must be developed and demonstrated in bulk liquid or dry gaseous xenon. This paper reports on the development of two families of dry-phase barium chemosensor molecules for use in high pressure xenon gas detectors, synthesized specifically for this purpose. One particularly promising candidate, an anthracene substituted aza-18-crown-6 ether, is shown to respond in the dry phase with almost no intrinsic background from the unchelated state, and to be amenable to barium sensing through fluorescence microscopy. This interdisciplinary advance, paired with earlier work demonstrating sensitivity to single barium ions in solution, opens a new path toward single ion detection in high pressure xenon gas.