bluuebunny/crossref_metadata_2025_split huggingface dataset:
ε-mechanism driven pulsations in hot subdwarf stars with mixed H-He atmospheres
Authors: Battich Tiara , Bertolami Marcelo M. Miller , Córsico Alejandro H. , Althaus Leandro G. 
Published: January 2018

Abstract
The ε mechanism is a self-excitation mechanism of stellar pulsations which acts in regions where nuclear burning takes place. It has been shown that the ε mechanism can excite pulsations in hot pre-horizontal branch stars before they settle into the stable helium core-burning phase and that the shortest periods of LS IV-14º116 could be explained that way.We aim to study the ε mechanism in stellar models appropriate for hot pre-horizontal branch stars to predict their pulsational properties.We perform detailed computations of non-adiabatic non-radial pulsations on such stellar models.We predict a new instability domain of long-period gravity modes in the log g − log Teff plane at roughly 22000 K ≲ Teff ≲ 50000 K and 4.67 ≲ log g ≲ 6.15, with a period range from ~ 200 to ~ 2000 s. Comparison with the three known pulsating He-rich subdwarfs shows that the ε mechanism can excite pulsations in models with similar surface properties except for modes with the shortest observed periods. Based on simple estimates we expect at least 3 stars in the current samples of hot-subdwarf stars to be pulsating by the ε mechanism. Our results could constitute a theoretical basis for future searches of pulsators in the Galactic field.
News on the X-ray emission from hot subdwarf stars
Authors: Palombara Nicola La , Mereghetti Sandro 
Published: January 2018

Abstract
In latest years, the high sensitivity of the instruments on-board the XMM-Newton and Chandra satellites allowed us to explore the properties of the X-ray emission from hot subdwarf stars. The small but growing sample of X-ray detected hot subdwarfs includes binary systems, in which the X-ray emission is due to wind accretion onto a compact companion (white dwarf or neutron star), as well as isolated sdO stars, in which X-rays are probably due to shock instabilities in the wind. X-ray observations of these low-mass stars provide information which can be useful for our understanding of the weak winds of this type of stars and can lead to the discovery of particularly interesting binary systems. Here we report the most recent results we have recently obtained in this research area.
The Delusion of Enchantment in Miguel Cervantes’s Don Quixote and William Shakespeare’s Midsummer Night’s Dream
Authors: Kodó Krisztina 
Published: January 2018

Abstract
The aim of the present article is to investigate the conceptual framework of magic and enchantment in the works of Miguel Cervantes de Saavedra and William Shakespeare. The works chosen for this comparative study are Don Quixote and Midsummer Night’s Dream. Shakespeare and Cervantes portray an ironic vision that may seem comic and grotesque on the surface, but in fact shows a violent and malign world. The portrayal of fantasy and realism parallel with the delusionary aspects of enchantment create an interplay between the ironic mockery and reality as seen through the experiences of the characters themselves. The delusions of enchantment experienced by the protagonists present a flawed world where jealousy, greed and corruption prevail.
Concrete minimal 3 × 3 Hermitian matrices and some general cases
Authors: Klobouk Abel H. , Varela Alejandro 
Published: January 2018

Abstract
Given a Hermitian matrix M ∈ M3(ℂ) we describe explicitly the real diagonal matrices DM such that ║M + DM║ ≤ ║M + D║ for all real diagonal matrices D ∈ M3(ℂ), where ║ · ║ denotes the operator norm. Moreover, we generalize our techniques to some n × n cases.
Effects of different production technologies on mechanical and metallurgical properties of precious metal denture alloys
Authors: Ferro Paolo , Battaglia Eleonora , Capuzzi Stefano , Berto Filippo 
Published: January 2018

AbstractBackgroundPrecious metal alloys can be supplied in traditional plate form or innovative drop form with high degree of purity.ObjectiveThe aim of the present work is to evaluate the influence of precious metal alloy form on metallurgical and mechanical properties of the final dental products with particular reference to metal-ceramic bond strength and casting defects.MethodA widely used alloy for denture was selected; its nominal composition was close to 55 wt% Pd – 34 wt% Ag – 6 wt% In – 3 wt% Sn. Specimens were produced starting from the alloy in both plate and drop forms. A specific test method was developed to obtain results that could be representative of the real conditions of use. In order to achieve further information about the adhesion behaviour and resistance, the fracture surfaces of the samples were observed using ‘Scanning Electron Microscopy (SEM)’. Moreover, material defects caused by the moulding process were studied.ResultsThe form of the alloy before casting does not significantly influence the shear bond strength between the metal and the ceramic material (p-value=0,976); however, according to SEM images, products from drop form alloy show less solidification defects compared to products obtained with plate form alloy. This was attributed to the absence of polluting additives used in the production of drop form alloy.ConclusionsThis study shows that the use of precious metal denture alloys supplied in drop form does not affect the metal-ceramic bond strength compared to alloys supplied in the traditional plate form. However, compared to the plate form, the drop form is found free of solidification defects, less expensive to produce and characterized by minor environmental impacts.
Additive bases with coefficients of newforms
Authors: García Victor Cuauhtemoc , Nicolae Florin 
Published: January 2018

Abstract
Let

f
⁢

(
z
)

=

∑

n
=
1

∞

a
⁢

(
n
)

⁢

e

2
⁢
π
⁢
i
⁢
n
⁢
z

{f(z)=\sum_{n=1}^{\infty}a(n)e^{2\pi inz}}

be a normalized Hecke eigenform in

S

2
⁢
k

new

⁢

(

Γ
0

⁢

(
N
)

)

{S_{2k}^{\mathrm{new}}(\Gamma_{0}(N))}

with integer Fourier coefficients. We prove that there exists a constant

C
⁢

(
f
)

>
0

{C(f\/)>0}

such that any integer is a sum of at most

C
⁢

(
f
)

{C(f\/)}

coefficients

a
⁢

(
n
)

{a(n)}

.
We have

C
⁢

(
f
)

≪

ε
,
k

N

6
⁢
k

-
3

16

+
ε

{C(f\/)\ll_{\varepsilon,k}N^{\frac{6k-3}{16}+\varepsilon}}

.
Interaction of the middle domains stabilizes Hsp90α dimer in a closed conformation with high affinity for p23
Authors: Synoradzki Kamil , Miszta Przemyslaw , Kazlauskas Egidijus , Mickevičiūtė Aurelija , Michailovienė Vilma , Matulis Daumantas , Filipek Slawomir , Bieganowski Pawel 
Published: January 2018

AbstractThe human genome encodes two highly similar cytosolic Hsp90 proteins called isoforms Hsp90α and Hsp90β. Of the 300 client proteins for Hsp90 identified so far only a handful interact specifically with one Hsp90 isoform. Here we report for the first time that Hsp90 cochaperone p23 binds preferentially to Hsp90α and that this interaction is mediated by the middle domain of Hsp90α. Based on the homology modeling, we infer that the middle domains in the Hsp90α dimer bind stronger with each other than in the Hsp90β dimer. Therefore, compared to Hsp90β, Hsp90α may adopt closed conformation more easily. Hsp90 interacts with p23 in the closed conformation. Hsp90α binds human recombinant p23 about three times stronger than Hsp90β but with significantly smaller exothermic enthalpy as determined by isothermal titration calorimetry of direct binding between the purified proteins. As p23 binds to Hsp90 in a closed conformation, stabilization of the Hsp90α dimer in the closed conformation by its middle domains explains preference of p23 to this Hsp90 isoform.
Generation of superoxide and hydrogen peroxide by side reactions of mitochondrial 2-oxoacid dehydrogenase complexes in isolation and in cells
Authors: Bunik Victoria I. , Brand Martin D. 
Published: January 2018

Abstract
Mitochondrial 2-oxoacid dehydrogenase complexes oxidize 2-oxoglutarate, pyruvate, branched-chain 2-oxoacids and 2-oxoadipate to the corresponding acyl-CoAs and reduce NAD+ to NADH. The isolated enzyme complexes generate superoxide anion radical or hydrogen peroxide in defined reactions by leaking electrons to oxygen. Studies using isolated mitochondria in media mimicking cytosol suggest that the 2-oxoacid dehydrogenase complexes contribute little to the production of superoxide or hydrogen peroxide relative to other mitochondrial sites at physiological steady states. However, the contributions may increase under pathological conditions, in accordance with the high maximum capacities of superoxide or hydrogen peroxide-generating reactions of the complexes, established in isolated mitochondria. We assess available data on the use of modulations of enzyme activity to infer superoxide or hydrogen peroxide production from particular 2-oxoacid dehydrogenase complexes in cells, and limitations of such methods to discriminate specific superoxide or hydrogen peroxide sources in vivo.
Odysseus in der Psychiatrie
Authors: Stoecker Ralf 
Published: January 2018

Abstract
Im Rahmen psychiatrischer Behandlungen ergeben sich immer wieder Situationen, in denen ärztliche Interventionen zwar dringend erforderlich sind, die Patientinnen und Patienten aber krankheitsbedingt nicht aufgeklärt in die Behandlung einwilligen können oder sie sogar ablehnen. In dem Beitrag soll erstens gezeigt werden, dass es sich bei derartigen Situationen tatsächlich um moralische Dilemmata handelt. Das liegt daran, dass das medizinethische Prinzip, Behandlungen nur nach aufgeklärter Einwilligung durchzuführen, nicht nur auf dem Recht auf Selbstbestimmung beruht, sondern auch auf dem Recht auf Integrität des Körpers und der Intimsphäre sowie dem Recht, keinem Zwang ausgesetzt zu werden. Alle drei Rechte sind wiederum eng mit dem Schutz der Würde der Patienten verbunden. Zweitens soll gezeigt werden, dass der Abschluss von Behandlungsvereinbarungen einen ethisch attraktiven Ausweg aus derartigen Dilemmata bieten kann, weil Behandlungsvereinbarungen eine Unterform sogenannter Odysseus-Verträge sind, die dazu geeignet sind, auch im Rahmen von Zwangsmaßnahmen die Würde der Patientinnen und Patienten zu wahren.
Fremdgefährdung durch potenzielle Straftäter als Einschränkung der Selbstbestimmung
Authors: Duttge Gunnar 
Published: January 2018

Abstract
Das Recht der Unterbringung von Straftätern wie sonstigen Gefährdern ist ebenso wie dasjenige zur Zwangsbehandlung in jüngerer Vergangenheit und Gegenwart erheblichen Veränderungen unterworfen. Ein vergleichender Blick auf die aktuell geltenden Rechtsgrundlagen zeigt jedoch im Binnenwie rechtsgebietsübergreifenden Vergleich erhebliche Fragwürdigkeiten und lässt ein konsistentes wertefundiertes Koordinatensystem für die - vielfach zu begrenzende - Zulässigkeit von Zwangsinterventionen gegenüber Psychiatriepatienten überfällig erscheinen.
Fundamental relation on m-idempotent hyperrings
Authors: Norouzi Morteza , Cristea Irina 
Published: January 2018

Abstract
The γ*-relation defined on a general hyperring R is the smallest strongly regular relation such that the quotient R/γ* is a ring. In this note we consider a particular class of hyperrings, where we define a new equivalence, called
$\varepsilon^{*}_{m} $, smaller than γ* and we prove it is the smallest strongly regular relation on such hyperrings such that the quotient R/
$\varepsilon^{*}_{m} $ is a ring. Moreover, we introduce the concept of m-idempotent hyperrings, show that they are a characterization for Krasner hyperfields, and that
$\varepsilon^{*}_{m} $ is a new exhibition for γ* on the above mentioned subclass of m-idempotent hyperrings.
Multiple and sign-changing solutions for discrete Robin boundary value problem with parameter dependence
Authors: Long Yuhua , Zeng Baoling 
Published: January 2018

Abstract
In this paper, we study second-order nonlinear discrete Robin boundary value problem with parameter dependence. Applying invariant sets of descending flow and variational methods, we establish some new sufficient conditions on the existence of sign-changing solutions, positive solutions and negative solutions of the system when the parameter belongs to appropriate intervals. In addition, an example is given to illustrate our results.
Quasi-maximum likelihood estimator of Laplace (1, 1) for GARCH models
Authors: Xuan Haiyan , Song Lixin , Amin Muhammad , Shi Yongxia 
Published: January 2018

Abstract
This paper studies the quasi-maximum likelihood estimator (QMLE) for the generalized autoregressive conditional heteroscedastic (GARCH) model based on the Laplace (1,1) residuals. The QMLE is proposed to the parameter vector of the GARCH model with the Laplace (1,1) firstly. Under some certain conditions, the strong consistency and asymptotic normality of QMLE are then established. In what follows, a real example with Laplace and normal distribution is analyzed to evaluate the performance of the QMLE and some comparison results on the performance are given. In the end the proofs of some theorem are presented.
Preliminary observations on use of Beauveria bassiana for the control of the sweet potato weevil (Cylas sp.) in South Africa
Authors: Hlerema Igenicious , Laurie Sunette , Eiasu Bahlebi 
Published: January 2018

Abstract
Sweet potato weevils (Cylas puncticollis and C. formicarius) are notorious pests of sweet potato and cause severe losses in marketable yield. The study tested the use of Beauveria bassiana ((Balsamo) Vuillemin) (Deuteromycota: Hyphomycetes) for controlling sweet potato weevils. An experiment was conducted using four treatments: 1) dipping sweet potato cuttings in solution of 1 g/litre B. bassiana before planting, 2) spraying with the registered chemical Deltametrin at 50ml/100litre every 2 weeks for four months after planting, 3) spraying the leaves every 2 weeks with B. bassiana (10 g/100 litre) for four months after planting; and 4) a control (sprayed with distilled water). The experimental design was a Latin square with split plot design: pest management strategy as main plot factor and cultivars (Bophelo, Ndou and Blesbok) as subplot factors. Spraying with B. bassiana significantly reduced the percentage of insect damaged roots (5.31%) compared to the control (13.75%). Dipping did not significantly reduce the number of insect damaged roots (12.13%). There was no significant difference between the chemical spray (5.88% insect damage) and spraying with B. bassiana (5.31% insect damage). The preliminary investigation indicated that B. bassiana can be considered as an alternative control method for the sweet potato weevil.
Ungleichheit, Sozialstaat und demokratische Repräsentation: Marktkorrigierende Politik durch den Medianwähler?
Authors: Dallinger Ursula 
Published: January 2018

AbstractPolitical economy of redistribution and comparative social policy research view the median voter as the political force, which demands marketregulating social policy in periods of increased income disparities and to which governments – to be re-elected – must respond. However, government responsiveness has been questioned, especially the responsiveness for political demands of low-income households. Are even the preferences of the median voter only selectively addressed through politics? If the median voter is actually influential, its redistributive preferences should explain the outcome of government action, e.g. size of redistribution. Is this true? Based on a pooled dataset with observations between 1980 and 2012 for 13 OECD-countries it is shown that the political position of the median voter alone has no impact. Rather mediating political factors like a proportional electoral system and left parties with wider welfare programs provide for broader representation and more redistribution.
Bedarfsgerechtigkeit ambulanter Pflege: Stärkung der subjektiven Perspektive durch Reformmaßnahmen der sozialen Pflegeversicherung?
Authors: Niens Christine , Hille Cornelius , Schüler Stefan , Hoffmeister Friederike , Marggraf Rainer 
Published: January 2018

AbstractThis paper examines the impacts of a German Social Law reform on the perceived quality of long-term home care. Taking a welfare economics perspective, an improved legal performance in addressing the personal needs of people depending on long-term care was found. Finally, recommendations to better adjust home care to the individual needs are given.
Effects of Plyometric and Resistance Training on Muscle Strength, Explosiveness, and Neuromuscular Function in Young Adolescent Soccer Players
Authors: McKinlay Brandon J. , Wallace Phillip , Dotan Raffy , Long Devon , Tokuno Craig , Gabriel David A. , Falk Bareket 
Published: January 2018

Abstract
McKinlay, BJ, Wallace, P, Dotan, R, Long, D, Tokuno, C, Gabriel, D, and Falk, B. Effects of plyometric and resistance training on muscle strength, explosiveness, and neuromuscular function in young adolescent soccer players. J Strength Cond Res 32(11): 3039–3050, 2018—This study examined the effect of 8 weeks of free-weight resistance training (RT) and plyometric (PLYO) training on maximal strength, explosiveness, and jump performance compared with no added training (CON), in young male soccer players. Forty-one 11- to 13-year-old soccer players were divided into 3 groups (RT, PLYO, and CON). All participants completed isometric and dynamic (240°·s−1) knee extensions before and after training. Peak torque (pT), peak rate of torque development (pRTD), electromechanical delay (EMD), rate of muscle activation (Q50), m. vastus lateralis thickness (VLT), and jump performance were examined. Peak torque, pRTD, and jump performance significantly improved in both training groups. Training resulted in significant (p ≤ 0.05) increases in isometric pT (23.4 vs. 15.8%) and pRTD (15.0 vs. 17.6%), in RT and PLYO, respectively. During dynamic contractions, training resulted in significant increases in pT (12.4 and 10.8% in RT and PLYO, respectively), but not in pRTD. Jump performance increased in both training groups (RT = 10.0% and PLYO = 16.2%), with only PLYO significantly different from CON. Training resulted in significant increases in VLT (RT = 6.7% and PLYO = 8.1%). There were no significant EMD changes. In conclusion, 8-week free-weight resistance and plyometric training resulted in significant improvements in muscle strength and jump performance. Training resulted in similar muscle hypertrophy in the 2 training modes, with no clear differences in muscle performance. Plyometric training was more effective in improving jump performance, whereas free-weight RT was more advantageous in improving peak torque, where the stretch reflex was not involved.
Comparison of Step-by-Step Kinematics in Repeated 30-m Sprints in Female Soccer Players
Authors: van den Tillaar Roland 
Published: January 2018

Abstract
van den Tillaar, R. Comparison of step-by-step kinematics in repeated 30-m sprints in female soccer players. J Strength Cond Res 32(7): 1923–1928, 2018—The aim of this study was to compare kinematics in repeated 30-m sprints in female soccer players. Seventeen subjects performed seven 30-m sprints every 30 seconds in one session. Kinematics was measured with an infrared contact mat and laser gun, and running times with an electronic timing device. The main findings were that sprint times increased in the repeated-sprint ability test. The main changes in kinematics during the repeated-sprint ability test were increased contact time and decreased step frequency, whereas no change in step length was observed. The step velocity increased in almost each step until the 14th, which occurred around 22 m. After this, the velocity was stable until the last step, when it decreased. This increase in step velocity was mainly caused by the increased step length and decreased contact times. It was concluded that the fatigue induced in repeated 30-m sprints in female soccer players resulted in decreased step frequency and increased contact time. Using this approach in combination with a laser gun and infrared mat for 30 m makes it very easy to analyze running kinematics in repeated sprints in training. This extra information gives the athlete, coach, and sports scientist the opportunity to give more detailed feedback and helps to target these changes in kinematics better to enhance repeated-sprint performance.
Acute Effects of a Caffeine-Containing Supplement on Anaerobic Power and Subjective Measurements of Fatigue in Recreationally Active Men
Authors: Hahn Chelsea J. , Jagim Andrew R. , Camic Clayton L. , Andre Matthew J. 
Published: January 2018

Abstract
Hahn, CJ, Jagim, AR, Camic, CL, and Andre, MJ. Acute effects of a caffeine-containing supplement on anaerobic power and subjective measurements of fatigue in recreationally active men. J Strength Cond Res 32(4): 1029–1035, 2018—Studies show mixed results for the effects of caffeine on performance, warranting further investigation. The purpose of this study was to examine the acute effects of a caffeine-containing supplement on anaerobic power and subjective measurements of fatigue during resisted sprinting on men. Fourteen recreationally active men (N = 14; [mean ± SD], age: 21.0 ± 0.7 years, height: 178.5 ± 5.1 cm, body mass: 77.3 ± 9.6 kg, and percent body fat: 12.6 ± 4.8%) participated in a double-blind, placebo-controlled, within-subject crossover design study. The first visit required each participant to complete 3 sets of practice sprints on a nonmotorized treadmill ranging from 10 to 20 seconds. During the second visit, participants completed 5 more practice sprints ranging from 15 to 25 seconds. During the third and fourth visits, participants ingested one serving of a caffeine-containing or placebo beverage (the opposite beverage was consumed during the fourth visit), rested for 20 minutes, and completed a dynamic warm-up before sprinting. Anaerobic power was assessed using a countermovement vertical jump and nonmotorized treadmill sprint test. Psychological variables were scored using a 5-point Likert scale. No significant (p ≤ 0.05) differences were observed between conditions for average (p = 0.22) or peak power (p = 0.43). Both conditions resulted in a significant increase in fatigue, although the increase was less for the caffeine condition (caffeine ∆ = 0.93 and placebo ∆ = 1.71). These findings indicated that the caffeine-containing supplement improved perceived measures of fatigue but not power indices assessed through vertical jump or nonmotorized treadmill sprinting. The consumption of a caffeine beverage may be beneficial for reducing perceived fatigue during acute anaerobic exercise, particularly when repeated sprints are used.