bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dynamical analysis of a predator-prey interaction model with time delay and prey refuge
Authors: Tripathi Jai Prakash , Tyagi Swati , Abbas Syed 
Published: November 2018

AbstractIn this paper, we study a predator-prey model with prey refuge and delay. We investigate the combined role of prey refuge and delay on the dynamical behaviour of the delayed system by incorporating discrete type gestation delay of predator. It is found that Hopf bifurcation occurs when the delay parameter τ crosses some critical value. In particular, it is shown that the conditions obtained for the Hopf bifurcation behaviour are sufficient but not necessary and the prey reserve is unable to stabilize the unstable interior equilibrium due to Hopf bifurcation. In particular, the direction and stability of bifurcating periodic solutions are determined by applying normal form theory and center manifold theorem for functional differential equations. Mathematically, we analyze the effect of increase or decrease of prey reserve on the equilibrium states of prey and predator species. At the end, we perform some numerical simulations to substantiate our analytical findings.
Structural aspects of heterooligonuclear platinum clusters – distortion isomers
Authors: Melník Milan , Mikuš Peter , Mikulová Mária Bodnár 
Published: November 2018

Abstract
This review covers 15 clusters of the compositions Pt3Re2, Pt2Os3, Pt3AgAu, Pt3Ir3, Pt2M4 (M=Ag or Pd), PtM5 [M=Ru (×2) or Os], Pt3Os4, Pt6Au2, Pt2Ru6, Pt3Ru6, Pt2Ru8, and PtAu9. Each of the cluster contains two crystallographically independent molecules that differ mostly by degree of distortion and are classical examples of distortion isomerism. Their structures are very complex. The inner coordination spheres about the metal atoms (Pt and M) are very complex as well. The clusters are rich in metal-metal bond distances with the shortest being 2.573 Å (Pt-Au), 2.615 (Pt-Pt), and 2.673 Å (Ru-Ru).
“Atmos-fear”: A psycho-semiotic analysis of messages in New York everyday life
Authors: Tateo Luca 
Published: November 2018

AbstractWe live in societies emphasizing security and its complementary side of fear. In this work, I analyze the peripheral messages disseminated in the urban environment, whose function is that of regulating human and collective conduct through orienting specific forms of affective meaning-making. According to the perspective of Cultural Psychology of Semiotic Dynamics, affect and cognition work always together. Affect has the primacy in the relationship with the world and on top of affective distinctions we build conceptual distinctions. Thus, I describe a type of semiotic process I have called “atmos-fear,” that works through the production of empty representamen that frames meaning. The concept of “atmos-fear” could be fruitfully developed to understand phenomena of politics, communication and construction of the Other in contemporary societies, where the dialogical relationship between security and fear is at stake.
Flexible HAR model for realized volatility
Authors: Audrino Francesco , Huang Chen , Okhrin Ostap 
Published: November 2018

Abstract
The Heterogeneous Autoregressive (HAR) model is commonly used in modeling the dynamics of realized volatility. In this paper, we propose a flexible HAR(1, . . . , p) specification, employing the adaptive LASSO and its statistical inference theory to see whether the lag structure (1, 5, 22) implied from an economic point of view can be recovered by statistical methods. The model differs from Audrino and Knaus (2016) [Audrino, F. and S. D. Knaus. 2016. “Lassoing the HAR model: A model selection perspective on realized volatility dynamics.” Econometrics Review 35: 1485–1521]. where the authors apply LASSO on the AR(p) model, which does not necessarily lead to a HAR model. Adaptive LASSO estimation and the subsequent hypothesis testing results fail to show strong evidence that such a fixed lag structure can be recovered by a flexible model. We also apply the group LASSO and related tests to check the validity of the classic HAR, which is rejected in most cases. The results justify our intention to use a flexible lag structure while still keeping the HAR frame. In terms of the out-of-sample forecasting, the proposed flexible specification works comparably to the benchmark HAR(1, 5, 22). Moreover, the time-varying model combinations show that when the market environment is not stable, the fixed lag structure (1, 5, 22) is not particularly accurate and effective.
Extremes for multivariate expectiles
Authors: Maume-Deschamps Véronique , Rullière Didier , Said Khalil 
Published: November 2018

Abstract
Multivariate expectiles, a new family of vector-valued risk measures, were recently introduced in the literature.
[22].
Here we investigate the asymptotic behavior of these measures in a multivariate regular variation context. For models with equivalent tails, we propose an estimator of extreme multivariate expectiles in the Fréchet domain of attraction case with asymptotic independence, or for comonotonic marginal distributions.
Update of the History of ASTM Committee D18 on Soil and Rock (2006–2015)
Authors: Edelen William F. 
Published: November 2018

Abstract
This update on the activities of the committee meetings of ASTM Committee D18 on Soil and Rock covers the years from 2006 through 2015. The purpose of the this update is to highlight the activities of the biannual meetings, winter and summer, of Committee D18, to list members’ awards, and to indicate those members who have deceased during this period. The paper was reviewed by Jeanne Asquith (3Rd Rock LLC, East Aurora, NY) and Ron Holsinger (retired).
A Proposed Mechanism for Spontaneous Transitions between Interictal and Ictal Activity
Authors: Jacob Theju , Lillis Kyle P. , Wang Zemin , Swiercz Waldemar , Rahmati Negah , Staley Kevin J. 
Published: November 2018

Epileptic networks are characterized by two outputs: brief interictal spikes and rarer, more prolonged seizures. Although either output state is readily modeledin silicoand induced experimentally, the transition mechanisms are unknown, in part because no models exhibit both output states spontaneously.In silicosmall-world neural networks were built using single-compartment neurons whose physiological parameters were derived from dual whole-cell recordings of pyramidal cells in organotypic hippocampal slice cultures that were generating spontaneous seizure-like activity.In silico, neurons were connected by abundant local synapses and rare long-distance synapses. Activity-dependent synaptic depression and gradual recovery delimited synchronous activity. Full synaptic recovery engendered interictal population spikes that spread via long-distance synapses. When synaptic recovery was incomplete, postsynaptic neurons required coincident activation of multiple presynaptic terminals to reach firing threshold. Only local connections were sufficiently dense to spread activity under these conditions. This coalesced network activity into traveling waves whose velocity varied with synaptic recovery. Seizures were comprised of sustained traveling waves that were similar to those recorded during experimental and human neocortical seizures. Sustained traveling waves occurred only when wave velocity, network dimensions, and the rate of synaptic recovery enabled wave reentry into previously depressed areas at precisely ictogenic levels of synaptic recovery. Wide-field, cellular-resolution GCamP7b calcium imaging demonstrated similar initial patterns of activation in the hippocampus, although the anatomical distribution of traveling waves of synaptic activation was altered by the pattern of synaptic connectivity in the organotypic hippocampal cultures.SIGNIFICANCE STATEMENTWhen computerized distributed neural network models are required to generate both features of epileptic networks (i.e., spontaneous interictal population spikes and seizures), the network structure is substantially constrained. These constraints provide important new hypotheses regarding the nature of epileptic networks and mechanisms of seizure onset.
Conidial Morphogenesis and Septin-Mediated Plant Infection Require Smo1, a Ras GTPase-Activating Protein in Magnaporthe oryzae
Authors: Kershaw Michael J , Basiewicz Magdalena , Soanes Darren M , Yan Xia , Ryder Lauren S , Csukai Michael , Oses-Ruiz Miriam , Valent Barbara , Talbot Nicholas J 
Published: November 2018

Abstract
The pathogenic life cycle of the rice blast fungus Magnaporthe oryzae involves a series of morphogenetic changes, essential for its ability to cause disease. The smo mutation was identified &gt; 25 years ago, and affects the shape and development of diverse cell types in M. oryzae, including conidia, appressoria, and asci. All attempts to clone the SMO1 gene by map-based cloning or complementation have failed over many years. Here, we report the identification of SMO1 by a combination of bulk segregant analysis and comparative genome analysis. SMO1 encodes a GTPase-activating protein, which regulates Ras signaling during infection-related development. Targeted deletion of SMO1 results in abnormal, nonadherent conidia, impaired in their production of spore tip mucilage. Smo1 mutants also develop smaller appressoria, with a severely reduced capacity to infect rice plants. SMO1 is necessary for the organization of microtubules and for septin-dependent remodeling of the F-actin cytoskeleton at the appressorium pore. Smo1 physically interacts with components of the Ras2 signaling complex, and a range of other signaling and cytoskeletal components, including the four core septins. SMO1 is therefore necessary for the regulation of RAS activation required for conidial morphogenesis and septin-mediated plant infection.
La spirale du déclassement. Essai sur la société des illusions, de l. Chauvel, 2016. Paris: Seuil
Authors: Urteaga Eguzki 
Published: November 2018

Louis Chauvel acaba de publicar su último libro titulado La spirale du déclassement. Essai sur la société des illusions (La espiral de la desclasificación. Ensayo sobre la sociedad de las ilusiones) en la editorial Seuil. Conviene recordar que este sociólogo galo es catedrático de Sociología en la Universidad de Luxemburgo, investigador asociado en el Observatorio Sociológico del Cambio de Sciences Po París, miembro honorario del Instituto Universitario de Francia y senior scholar en Luxembourg Income Study (LIS). Entre sus obras más relevantes es preciso mencionar Les classes moyennes à la dérive (2006) y Le destin des générations (2010).Como lo indica el propio Chauvel, su última obra parte del siguiente diagnóstico:el incremento de las desigualdades, [que resulta] evidente si consideramos el rol [desempeñado por el] patrimonio, conduce a una parte de las clases medias y de las nuevas generaciones a seguir las clases populares en la senda del empobrecimiento, provocando una espiral general de desclasificación (p. 9).Este proceso condena, a plazo, el ideario social de una "civilización de clase media" que confía en su capacidad para transmitir a las generaciones siguientes un mundo mejor (p. 9). El autor desea comprender los mecanismos de esta desclasificación, además de poner de manifiesto el sentido y las consecuencias de la reconstitución de la "vertical del poder socioeconómico" que se había atenuado durante el período de rápido crecimiento de la sociedad salarial entre 1945 y 1975. Trata de poner en evidencia los elementos constitutivos de la "repatrimonialización", "ese proceso de reconstitución de la acumulación de riqueza que radicaliza las diferencias entre los herederos protegidos por sus esperanzas patrimoniales y los simples poseedores de títulos académicos [desvalorizados] en el mercado laboral" (p. 10). De hecho, la fractura intergeneracional no se opone a las desigualdades sociales, puesto que ambos fenómenos se refuerzan mutualmente para hacer sistema.
Aportes a la comprensión de la doble excepcionalidad: Alta capacidad con trastorno por déficit de atención y alta capacidad con trastorno del espectro autista
Authors: Conejeros-Solar María Leonor , Gómez-Arizaga María Paz , Sandoval-Rodríguez Katia , Cáceres-Serrano Pablo Andrés 
Published: November 2018

En la década de los 80 surge un nuevo concepto en educación -doble excepcionalidad- que hace referencia a una paradoja entre una alta habilidad y una dificultad que impactan en el desarrollo y aprendizaje de niños, niñas y jóvenes. El objetivo del presente artículo es aportar a la comprensión de esta temática poco abordada en el contexto latinoamericano y a su estado de desarrollo para que profesionales que se vinculan al ámbito educativo la visibilicen e incorporen a sus prácticas pedagógicas. Se realizó una búsqueda sistemática en diversas bases de datos electrónicas y en revistas especializadas en el área de alta capacidad y se identificaron variables cognitivas y socioafectivas a la base de la condición de alta capacidad con trastorno por déficit de atención y alta capacidad con trastorno del espectro autista. Se incorporaron, además, aspectos relativos a identificación y apoyos educativos. Como principales temáticas se visualizan la complejidad en la comprensión de la doble condición, así como la necesidad de procesos de identificación e intervención comprensivos que reconozcan las características particulares de cada dualidad. Se recogen y comentan los principales desafíos tanto para su identificación como para su abordaje psicoeducativo y se plantean los aspectos que requieren de mayor investigación para avanzar en el estudio de esta temática. Es responsabilidad de los grupos profesionales de la educación visibilizar y atender a este estudiantado que convive con la incomprensión personal y social en entornos educativos que no los reconocen ni distinguen sus características.
Gambling, motor cautiousness, and choice impulsivity: An experimental study
Authors: Harris Andrew , Kuss Daria , Griffiths Mark D. 
Published: November 2018

Background
Impulsivity is currently more commonly regarded as multifaceted, comprising both motor and cognitive subdomains. However, it is less clear how distinct these subdomains are, and the extent to which they interact and draw upon the same psychological resources.

Methods
The present experiment comprised 70 regular (non-problem) gamblers, and investigated the potential to induce impulsivity transfer effects within an electronic gambling context. Original and existing harm-minimization approaches were tested for their efficacy in inducing motor cautiousness during an electronic slot machine simulation. Participants were exposed to a forced discriminatory motor choice procedure, or pop-up responsible gambling messages that either contained emotive or non-emotive responsible gambling content. The subsequent impact these interventions had on delay discounting and reflection impulsivity was also measured using the 27-item Monetary Choice Questionnaire and Information Sampling Task, respectively.

Results
Findings demonstrated that only original harm-minimization approaches, which force the gambler to engage in discriminatory motor choice procedures during gambling, were successful in inducing motor cautiousness. However, both the discriminatory choice procedure and emotive message harm-minimization approaches were successful in facilitating cognitive choice, even though the emotive message intervention was unsuccessful in facilitating motor response inhibition, suggesting both an indirect motor cautiousness route, and a more direct route to improved cognitive choice during gambling.

Conclusion
This study demonstrated that decision-making during gambling can be improved by making simple structural changes to slot machine platforms, by encouraging active engagement in motor processes, which result in a transfer of cautiousness to wider cognitive domains.
Purification of Catalase by Modified Procedure and some Properties of Enzyme
Authors: An Nguyen Hoang , Suminda Godagama Gamarchchige Dinesh , Phuong Nguyen Thi Thu , Thai Dinh Nho , Loan Nguyen Thi Hong 
Published: November 2018

Catalase (EC 1.11.1.6) plays an important role in protecting organism from oxidative effect by breaking down H2O2 into H2O and O2 molecules. In this study, a modified procedure for catalase from bovine liver and its properties were reported. Bovine liver catalase was purified to electrophoretic homogeneity as a single protein band around 60 kDa on SDS-PAGE by acetone fractionation, followed by ion-exchange chromatography on DEAE-Sepharose and CM-Sepharose columns. The specific activity of the purified catalase was 79,277 units per mg of protein (U/mg) with 1.87% recovery and purification fold was roughly 60 times. The catalase was a homo-tetramer with a molecular mass of about 240.987 kDa as determined by native gel electrophoresis. The purified enzyme showed the highest activity at pH 7, 37°C, and remained active over a broad range of pH from 5 to 10 and range of temperature from 4°C to 40°C. Its activity was inactivated by incubating in 60°C for 30 min. The activity of the enzyme was induced by Ca2+ and inhibited by Na+, Ni2+, Cu2+, Zn2+, Fe2+, Fe3+ and NaN3. Under the optimal conditions, Km and Kcat/Km values of the catalasewas found to be 23,69 mM and Kcat/Km = 5.106 (M.s)-1, respectively
Rotorua Mad Poets: Words of Their Own
Authors: Locke Terry 
Published: November 2018

Abstract

If truth is beauty, beauty truth
Just as the poet said[i],
Then patterned sense in research
Can be sewed by lyric thread.

Mad Poets Rotorua is
The topic of this story,
Acknowledging that all research
Is largely allegory.

The group has met religiously
Since Nineteen Ninety-Four
Enabling some to read their poems
Who’d never read before.

From my perspective many themes
Emerge in all that follows,
While these are mine, there will be those
That you my reader hallows.

[i] John Keats’ famous conclusion to “Ode on a Grecian urn”, slightly paraphrased.
Predictor value of the inflammation biomarkers regarding the post-infarction remodeling of myocardium
Authors: Ivanov M. V. , Popovich M. I. , Cheban L. M. , Popovich I. M. , Ivanov V. M. , Kobets V. A. 
Published: November 2018

Aim.To study the trait of the changes of circulating level of pro- and antiinflammatory biomarkers as well as metalloproteinase 8 (MMP-8) in the first 7 days after revascularization in patients with acute myocardial infarction with ST segment elevation (STEMI) for assessment of their prognostic value regarding post-infarction remodeling pattern.Material and methods.In 113 patients with STEMI which developed in 5 months after angioplasty adaptive myocardium remodeling (AMR) (n=56) or pathological myocardium remodeling (PMR) (n=57), determined by enzyme-linked immunosorbent assay (ELISA) method daily serum concentration of pro-inflammatory ((high sensitive C reactive protein, interleukins (IL) 1, 6, tumor necrosis factor alpha and monocyte chemoattractant protein 1)), anti-inflammatory biomarkers (IL-4, IL-10, IL-33, IL-1 receptor antagonist and heregulin-1beta) аs well as ММР-8 in the first 7 days after myocardium revascularization. According to clinic-demographic indices both groups were comparable. Obtained data have been compared with results of 20 healthy persons (control group).Results.The dynamics of pro-inflammatory biomarkers did not differ in patients with AMR and PMR after revascularization. It was characterized by a significant biomarker increase at 3-rd day followed by a decline toward 7-th day up to initial level. Among anti-inflammatory biomarkers IL-4 and IL-10 have manifested by a distinct dynamic in concern to myocardial remodeling pattern. In both groups these interleukins decreased after angioplasty, reaching a minimal level at 3-rd day. However, in patients with AMR since 4-th day has been established an increase of serum content of IL-4 and IL-10, their increment being at 7-th day in a range of 52-55% (p<0,05). In patients with PMR the interleukins rise was negligible: 5,7-5,8%. MMP-8 dynamics also has been different in groups and was correlated with dynamics of IL-4 and IL-10. Thus, in patients with AMR its level has fallen since 4-th day up to 7-th day by 46,6%, while in group with PMR metalloproteinase level in this period practically did not change, remaining significantly higher than control by 45-53%.Conclusion.In our study the serum content of main pro-inflammatory biomarkers (hsCRP, IL-1, IL-6, TNF-ɑ) didn’t differ in the first 7 days after revascularization in patients with adaptive and pathological postinfarction remodeling of myocardium, and thus don’t have predictive value concerning the remodeling pattern. Among anti-inflammatory cytokines dynamics of IL-4 and IL-10 differed in dependence on remodeling pattern. Their significant elevation by 52-55% from 4th up to 7th day after angioplasty was established in patients with adaptive myocardium remodeling, while in PMR their level didn’t change during this period that can emphasize their prognostic value. The character of MMP-8 change is pathogenetically correlated with dynamics of IL-4 and IL-10.
Predictive markers of atrial fibrillation in patients after acute ST-elevated myocardial infarction (the results of observational program “FAKEL”)
Authors: Zolotovskaya I. A. , Davydkin I. I. , Duplyakov D. V. , Kokorin V. A. 
Published: November 2018

Aim. To assess probability of atrial fibrillation (AF) in patients after ST-elevated myocardial infarction (STEMI) with undergone primary percutaneous coronary intervention (PCI).Material and methods. Prospective study in the period from December 2015 to November 2017 was carried out with consecutive inclusion of 107 patients at outpatient follow-up stage after STEMI who have undergone primary PCI. The mean age of patients was 69,5+7,8 years (40 (37,4%) women). Follow-up period was 18 months and included three visits (V): V1 — when included in the study, V2 — after 12 months, and V3 — after 18 months. The endpoints of the study were cases of first diagnosed AF, cardioembolic stroke and death. At all visits predictive markers (Willebrand factor, Cystatin C, N-terminal prohormone of brain natriuretic peptide (NT-proBNP), galectin-3) in the blood plasma were determined.Results. After 18 months of follow-up period in 19 (17,8%) patients were diagnosed AF, 5 of them (4,7%) had cardioembolic stroke, and 3 patients died. Median time of AF development from the onset of STEMI was 308 days. Cox multivariate analysis showed that the risk factors for first diagnosed AF were NT-proBNP — relative risk (RR): 1,05; 95% confidence interval (CI): 0,99-1,10 (p=0,038), cystatin C — RR: 1,44; 95% CI: 0,98-2,12 (p=0,043), galectin-3 — RR: 1,20; 95% CI: 1,03-1,40 (p=0,022).Conclusion. There was a highly significant relationship between NT-proBNP of ≥400,0 pg/mL, cystatin С of ≥1,45 ng/mL and galectin-3 of ≥25 mg/mL in patients after STEMI who underwent primary PCI. These markers might serve as predictors of first diagnosed AF. Identification of these biomarkers may have potential therapeutic benefit in improving the prognosis of patients after STEMI who have undergone primary PCI and reduce mortality from cardioembolic stroke.