bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation and performance of 99Mo/99mTc chromatographic column generator based on zirconium molybdosilicate
Authors: Mostafa M. , Saber H. M. , El-Sadek A. A. , Nassar M. Y. 
Published: March 2016

Abstract
Zirconium molybdosilicate (ZrMoSi) gel prepared using 99Mo radiotracer via peroxo route was used as a base material
for 99Mo/99mTc column generator. The 99mTc elution yield and 99Mo
breakthrough in the eluate were studied as a function of the pH-value of gel precipitation, gel drying temperature and
Zr:Mo:Si molar ratio. Precipitation pH-value of 2, drying temperature of 100 ℃ and
Zr:Mo:Si molar ratio of 0.5:0.5:1 were found to be the optimum conditions achieving 99mTc
elution yield of 82% and 99Mo breakthrough of 1.0E-3%. The gel prepared with the optimum conditions was
characterized by BET surface area and pore size analyzer, IR spectroscopy, thermal analysis (TGA and DTA), XRD, XRF and
FESEM. Technetium-99m eluted from the optimum ZrMoSi 99Mo/99mTc generator was found to have
a high radiochemical purity (98% as 99mTcO4

–
) and chemical purity meeting criteria of clinical grade.
Hopf bifurcation in an overlapping generations resource economy with endogenous population growth rate
Authors: Fazlıoğlu Burcu , Sağlam Hüseyin Çağrı , Yüksel Mustafa Kerem 
Published: March 2016

AbstractAs scarce environmental resources necessarily put a constraint on population growth, we use more realistic population growth dynamics which contemplates a feedback mechanism between population growth rate and resource availability. We examine the local stability properties in overlapping generations resource economies which takes this feedback mechanism into account. The results indicate that Hopf bifurcation may arise without requiring logistic regeneration or unconventional constraints on parameter values. In particular, Hopf bifurcation is encountered under convex-concave dependence of carrying capacity on the resource availability.
The place of gold in the cross-market dependencies
Authors: Aboura Sofiane , Chevallier Julien , Jammazi Rania , Tiwari Aviral Kumar 
Published: March 2016

AbstractThis paper investigates the inter-relationships between the gold price on the one hand, other precious metals (e.g. silver, palladium, platinum) and asset markets (e.g. stocks, bonds, crude oil) on the other hand. The econometric methodology relies on the Markov-switching BEKK model by
Comparison of Fourier and normal angle descriptors for the content-based image retrieval
Authors: Hernández Mesa Pilar , Puente León Fernando 
Published: March 2016

Abstract
Appropriate methods are necessary to compare and search images automatically without using
tags. In this work the retrieval of similar objects in images using the shape information is
investigated. For this purpose, Fourier descriptors and the angles from the normal vectors
along the boundaries of the objects are used as shape descriptors. Three different features
are extracted from the Fourier descriptors to compare the objects. Three different distance
functions are proposed to measure the similarity between the objects when the angles of the
normal vectors are used as features. Finally, the appropriateness of these methods for the
content-based image retrieval is compared at a commonly used database to test such cases.
Experimentelle Untersuchung elastokalorischer Kühlprozesse
Authors: Schmidt Marvin , Schütze Andreas , Seelecke Stefan 
Published: March 2016

Zusammenfassung
Die im Rahmen dieser Arbeit durchgeführten Untersuchungen beinhalten
die Charakterisierung von Formgedächtnislegierungen hinsichtlich
ihrer elastokalorischen Eigenschaften sowie die Analyse des
Einflusses von Prozessführung und thermischen Randbedingungen auf
die Kühlleistung. Diese Untersuchungen wurden mit einer speziell
entwickelten wissenschaftlichen Testplattform durchgeführt, die es
ermöglicht, die Legierungen zu charakterisieren und in einem
Kühlprozess zu erforschen. Die Materialcharakterisierung umfasst
Zugversuche bei verschiedenen Dehnraten, wobei simultane Messungen
von Spannung und Dehnung sowie des Temperaturfeldes durchgeführt
werden. Basierend auf diesen Messungen lassen sich Aussagen über die
Ratenabhängigkeit und Homogenität des elastokalorischen Effektes
sowie die Effizienz des Kühlprozesses insgesamt treffen. Zusätzlich
kann die Langzeitstabilität der Materialien in Abhängigkeit von den
Prozessparametern und dem Materialtraining, d. h. dem
Einfahrprozess, untersucht werden. Basierend auf diesen
Untersuchungen erfolgt eine Variation der Prozessparameter unter
veränderlichen thermischen Randbedingungen. Die Parameterstudie
zeigt, dass eine von Wärmesenken- und Wärmequellentemperatur
abhängige Anpassung der Prozessführung zu einer Steigerung der
Kühlleistung führt.
Präzision und Sensorspezifikationen der wellenfrontbasierten Justage kleinaperturiger optischer Systeme
Authors: Krappig Reik , Schmitt Robert 
Published: March 2016

Zusammenfassung
Neben den anspruchsvollen Spezifikationen in der Fertigung einzelner optischer Komponenten wird
die Komplexität ganzer Systeme stark durch die Positionierung der Komponenten zueinander
beeinflusst. Diese Positionierung muss so exakt wie möglich sein, um eine optimale optische
Funktion des Gesamtsystems zu gewährleisten. Methoden der aktiven Justage bieten dazu einen
eleganten Ansatz, da durch die Erfassung der optischen Funktion Rückschlüsse auf den Systemzustand
gewonnen und geeignete Korrekturanweisungen berechnet werden können. Vorgestellt wird ein
erweiterter wellenfrontbasierter Ansatz zur aktiven und hochpräzisen Justage kleinformatiger
Komponenten am Beispiel eines einfachen Demonstratorsystems. Die simulierten Ergebnisse
illustrieren die erzielbare Präzision und erlauben einen wichtigen Blick auf die erforderlichen
Eigenschaften von Wellenfrontsensoren, damit derartige Werte auch in der Praxis erreicht werden
können.
Erweiterung des Raman-Nath-Modells zur Analyse von Schlierenabbildungen
Authors: Olfert Sergei , Henning Bernd 
Published: March 2016

Zusammenfassung
Die Schlierentechnik ist ein schnelles und nichtinvasives Verfahren zur Visualisierung von Schallfeldern in transparenten
Flüssigkeiten. Dabei wird die akustooptische Interaktion zwischen einer transmittierenden elektromagnetischen Welle und der akustischen
Welle ausgenutzt. Die Phase der ebenen EM-Welle wird beim Transmittieren durch die akustische Welle integral in Richtung der optischen
Achse moduliert und nach einer optischen Filterung auf einem Bildsensor abgebildet. In diesem Beitrag wird gezeigt, dass die
Orthogonalität der Schallwellen- und EM-Wellenfronten ein wichtiges Kriterium für die Abbildung der Schallwechseldruckverteilungen
ist.
Advance and case studies of the DAICOX framework for automated design of multi-sensor intelligent measurement systems
Authors: Thongpull Kittikhun , König Andreas 
Published: March 2016

Abstract
In this paper, we report on the advance and application of our DAICOX system conceived for
the automated and transparent design of integrated intelligent multi-sensor measurement
applications. The current implementation allows the front to back design from raw sensory
data to decision making. In particular, novelty or One-Class Classification (OCC) methods,
improved assessment functionality, and automated design of feature computation by
multi-objective optimization techniques to complete the processing chain complement the
system. Two representative applications, i. e., basic food analysis and magnetic
localization, have been selected as case studies with existing manual solutions to
demonstrate and assess the applicability of the conceived architecture and its
implementation. DAICOX reduced the design time by 98.62%, while increasing the
recognition rate by 5.21% in the first case study and 0.71% in the second
case study. The optimized solution can now be deployed to a run time system. In future work,
extension of the method portfolio, self-x functionality, and public-domain availability are
aspired.
Standardisierung eines schnellen drahtlosen Sensor/Aktor-Netzwerkes für die Fertigungsautomatisierung
Authors: Krush Dmytro , Cammin Christoph , Heynicke Ralf , Scholl Gerd 
Published: March 2016

Zusammenfassung
Drahtlose Kommunikationstechnologien konnten sich in den letzten Jahren auch im
industriellen Umfeld fest etablieren. Im Vergleich zu Standard-Büro-Anwendungen sind in der
Regel jedoch die Anforderungen bezüglich Robustheit, Koexistenzfähigkeit, Ausfallsicherheit
und Latenzzeiten deutlich höher . Gemäß VDI/VDE
2185 lassen sich die jeweiligen Automatisierungslösungen den Branchen
Logistik/Transport, Infrastrukturanlagen, Gebäudeautomatisierung sowie Fertigungs- und
Prozessautomatisierung zuordnen. In diesem Beitrag wird dargestellt, welche besondere
Herausforderungen im Bereich der Fertigungsautomatisierung an die
Sensor/Aktor-Kommunikation gestellt werden. Ferner wird eine mögliche Lösung vorgestellt,
die in Zusammenarbeit mit industriellen Partnern innerhalb der Profibus-Nutzerorganisation
entwickelt wurde und die sich momentan in der
Endphase des Standardisierungsprozesses befindet.
Anwendungsorientiertes Verfahren zur Eindeutigkeitsbereichserweiterung eines fasergekoppelten Zweiwellenlängen-Interferometers
Authors: Schake Markus , Lehmann Peter 
Published: March 2016

Zusammenfassung
Eine charakteristische Einschränkung phasenmessender Interferometer zur Messung von
Abstandsänderungen ist durch ihren auf eine halbe Lichtwellenlänge λ

i
begrenzten
Eindeutigkeitsbereich gegeben. Der Eindeutigkeitsbereich eines Laserinterferometers
vergrößert sich, wenn zwei Laserlichtquellen unterschiedlicher Wellenlänge λ
1 ≠ λ
2 eingesetzt werden und das Interferenzsignal der resultierenden synthetischen
Wellenlänge
Λ = λ
1 · λ
2/|λ
1 − λ
2|
ausgewertet wird. In diesem Beitrag wird ein Algorithmus zur Signalverarbeitung für
Zweiwellenlängeninterferometer vorgestellt, der basierend auf einem Ansatz von P. de Groot
den Eindeutigkeitsbereich über eine halbe synthetische Wellenlänge hinaus erweitert. Die
Funktionalität und Praxistauglichkeit des Algorithmus wird am Beispiel der Auswertung von
Messdaten eines fasergekoppelten, punktförmig messenden Zweiwellenlängeninterferometers mit
optischer Weglängenmodulation demonstriert.
From Parliamentarisation Towards Presidentialisation: Institutional Aspects of Local Political Leadership in Slovenia
Authors: Kukovič Simona , Brezovšek Marjan 
Published: March 2016

AbstractIn this paper, the authors analyse the institutional aspects of local governance. After the local government reforms, two main currents of change were created among European countries, namely the (quasi-) parliamentarisation administration systems committees, and (quasi-) presidentialisation through the form of elected mayors. Through an overview of the changes in the Slovenian local self-government in the last two decades, the authors determine a gradual transition from parliamentarism (with a relatively strong legislative body, municipal council) to the strengthening of the individual executive body (mayor), e.g. presidentialisation. By using the calculated index of mayoral strength, the authors conclude that according to the mayoral institutional power, the Slovenian system of local self-government is closer to the countries with (post) Napoleonic administrative tradition than to the countries of Central and Eastern Europe.
Two new glycosidal metabolites of endophytic fungus Penicillium sp. (NO.4) from Tapiscia sinensis
Authors: Wan Qiao , Feng Ziwei , Li Xueshuang , Lv Mengmeng , Guo Zhiyong , Deng Zhangshuang , Zou Kun 
Published: March 2016

Abstract
Two new glycosides, 8-O-β-
d-glucopyranosyl-6-methyl-1-carboxylate methyl ester xanthone (1) and 4′-O-β-
d-galactopyranosyl djalonensone (2), together with four known compounds, 8-hydroxy-6-methyl-9-oxo-9H-xanthene-1-carboxylate methyl ester (3), cassionllin (4), djalonensone (5) and alternariol (6), were isolated from the endophytic fungus Penicillium sp. (NO.4) of Tapiscia sinensis Oliv. The structures of compounds 1–6 were elucidated by the analysis of 1D and 2D NMR and HRMS. The cytotoxic activities of these compounds were evaluated against four cancer cell lines, as well as antimicrobial activities against two plant-pathogenic microbes. Compounds 1–6 showed moderate cytotoxicity against the A549 cancer cell line with IC50 values ranging from 6.8 to 35.8 μg mL−1 and were found to be inactive against three other cancer cell lines MCF-7, Caski and Hep G-2.
New transition metal oxide fluorides with ReO3-type structure
Authors: Nakhal Suliman , Lerch Martin 
Published: March 2016

Abstract
The new niobium oxide fluorides MNbO2F4 [M = (Cr, Fe)], CrNb2O4F5, and Fe2Nb3O6F9 were prepared by treatment of chromium or iron nitrate with Nb-containing hydrofluoric acid solutions. Crystal structures were investigated by means of X-ray powder diffraction. All new compounds can be structurally refined in the cubic ReO3-type. The iron niobium oxide fluorides are reddish orange, and chromium containing phases exhibit a light green color. The niobium atoms are in the highest formal oxidation state.
Two new ternary chalcogenides Ba2ZnQ3(Q= Se, Te) with chains of ZnQ4tetrahedra: syntheses, crystal structure, and optical and electronic properties
Authors: Prakash Jai , Mesbah Adel , Beard Jessica , Rocca Dario , Lebègue Sébastien , Malliakas Christos D. , Ibers James A. 
Published: March 2016

AbstractSingle crystals of Ba2ZnQ3(Q= Se, Te) were obtained by solid-state reactions at 1173 K. These isostructural compounds crystallize in the K2AgI3structure type. The Zn atoms in this structure are coordinated to fourQatoms (2Q1, 1Q2, 1Q3) and these form a distorted tetrahedron around each Zn atom. Each ZnQ4tetrahedron shares two corners with neighboring ZnQ4tetrahedra resulting in the formation of infinite chains of [ZnQ44−] units. The absorption spectrum of a single crystal of Ba2ZnTe3shows an absorption edge at 2.10(2) eV, consistent with the dark-red color of the crystals. From DFT calculations Ba2ZnSe3and Ba2ZnTe3are found to be semiconductors with electronic band gaps of 2.6 and 1.9 eV, respectively.
The Neuropsychiatric Disease-Associated Genecacna1cMediates Survival of Young Hippocampal Neurons
Authors: Lee Anni S. , De Jesús-Cortés Héctor , Kabir Zeeba D. , Knobbe Whitney , Orr Madeline , Burgdorf Caitlin , Huntington Paula , McDaniel Latisha , Britt Jeremiah K. , Hoffmann Franz , Brat Daniel J. , Rajadhyaksha Anjali M. , Pieper Andrew A. 
Published: March 2016

Genetic variations inCACNA1C, which encodes the Cav1.2 subunit of L-type calcium channels (LTCCs), are associated with multiple forms of neuropsychiatric disease that manifest high anxiety in patients. In parallel, mice harboring forebrain-specific conditional knockout ofcacna1c(forebrain-Cav1.2 cKO) display unusually high anxiety-like behavior. LTCCs in general, including the Cav1.3 subunit, have been shown to mediate differentiation of neural precursor cells (NPCs). However, it has not previously been determined whether Cav1.2 affects postnatal hippocampal neurogenesisin vivo. Here, we show that forebrain-Cav1.2 cKO mice exhibit enhanced cell death of young hippocampal neurons, with no change in NPC proliferation, hippocampal size, dentate gyrus thickness, or corticosterone levels compared with wild-type littermates. These mice also exhibit deficits in brain levels of brain-derived neurotrophic factor (BDNF), and Cre recombinase-mediated knockdown of adult hippocampal Cav1.2 recapitulates the deficit in young hippocampal neurons survival. Treatment of forebrain-Cav1.2 cKO mice with the neuroprotective agent P7C3-A20 restored the net magnitude of postnatal hippocampal neurogenesis to wild-type levels without ameliorating their deficit in BDNF expression. The role of Cav1.2 in young hippocampal neurons survival may provide new approaches for understanding and treating neuropsychiatric disease associated with aberrations inCACNA1C.Visual Abstract
Learning Probabilistic Inference through Spike-Timing-Dependent Plasticity
Authors: Pecevski Dejan , Maass Wolfgang 
Published: March 2016

AbstractNumerous experimental data show that the brain is able to extract information from complex, uncertain, and often ambiguous experiences. Furthermore, it can use such learnt information for decision making through probabilistic inference. Several models have been proposed that aim at explaining how probabilistic inference could be performed by networks of neurons in the brain. We propose here a model that can also explain how such neural network could acquire the necessary information for that from examples. We show that spike-timing-dependent plasticity in combination with intrinsic plasticity generates in ensembles of pyramidal cells with lateral inhibition a fundamental building block for that: probabilistic associations between neurons that represent through their firing current values of random variables. Furthermore, by combining such adaptive network motifs in a recursive manner the resulting network is enabled to extract statistical information from complex input streams, and to build an internal model for the distributionp*that generates the examples it receives. This holds even ifp*contains higher-order moments. The analysis of this learning process is supported by a rigorous theoretical foundation. Furthermore, we show that the network can use the learnt internal model immediately for prediction, decision making, and other types of probabilistic inference.
Atypical Social Development in Vasopressin-Deficient Brattleboro Rats
Authors: Paul Matthew J. , Peters Nicole V. , Holder Mary K. , Kim Anastasia M. , Whylings Jack , Terranova Joseph I. , de Vries Geert J. 
Published: March 2016

AbstractOver the past 3 decades, a large body of evidence has accumulated demonstrating that the neuropeptide arginine vasopressin (AVP) plays a critical role in regulating social behavior. The overwhelming majority of this evidence comes from adults, leaving a gap in our understanding of the role of AVP during development. Here, we investigated the effect of chronic AVP deficiency on a suite of juvenile social behaviors using Brattleboro rats, which lack AVP due to a mutation in theAvpgene. Social play behavior, huddling, social investigation & allogrooming, and ultrasonic vocalizations (USVs) of male and female rats homozygous for the Brattleboro mutation (Hom) were compared with their wild-type (WT) and heterozygous (Het) littermates during same-sex, same-genotype social interactions. Male and female Hom juveniles exhibited less social play than their Het and WT littermates throughout the rise, peak, and decline of the developmental profile of play. Hom juveniles also emitted fewer prosocial 50 kHz USVs, and spectrotemporal characteristics (call frequency and call duration) of individual call types differed from those of WT and Het juveniles. However, huddling behavior was increased in Hom juveniles, and social investigation and 22 kHz USVs did not differ across genotypes, demonstrating that not all social interactions were affected in the same manner. Collectively, these data suggest that theAvpgene plays a critical role in juvenile social development.
Accurate Predictions of Velocity Profiles and Frictional Pressure Losses in Annular YPL-Fluid Flow
Authors: Hashemian Yahya , Yu Mengjiao , Miska Stefan , Shirazi Siamack , Ahmed Ramadan 
Published: March 2016

Summary
Eccentricity of the annulus can greatly affect the velocity profile, especially in extended-reach wells and slimholes. While frictional pressure losses in concentric and fully eccentric annuli have been studied before, this paper focuses on the effect of arbitrary eccentricities on velocity profile and corresponding influence on frictional pressure losses.
In this study, axial flow of yield-power-law (YPL) fluids in eccentric annuli for a 2D steady-state flow has been investigated numerically and verified against experiments. A boundary-fitted coordinate system is used to discretize the flow equations and generate the mesh network. Fluid-flow equations were solved adopting an iterative method. The results of simulation include the effects of fluid rheology, flow rate, annulus dimensions, and eccentricity on velocity profile and frictional pressure losses in the annulus. Numerical results were compared with the available extensive experimental investigations on the flow of a variety of drilling fluids that have a strong shear-thinning property and high yield stress (e.g., polymer-based and bentonite fluids). The tests were implemented over a wide range of flow rates using a flow loop that is equipped with a pipe viscometer and several annular test sections with various sizes and eccentricities.
Field observations, experimental data, and the analytical approach in this study indicate that increasing eccentricity lowers frictional pressure drop in the annulus. A good agreement was observed between the numerical-simulation results and experimental measurements. Comparison of the present and past studies with analytical solutions of Newtonian fluids in an eccentric annulus shows that the current study provides more-accurate results.
Detailed numerical simulation and the equations that are presented in this study can be used by investigators. The application of the Cartesian and boundary-fitted coordinate systems and algebraic correlations for geometry transformations are presented. Moreover, the exact method of flow-rate calculation based on the velocities at each gridpoint is shown in the provided details.
The application of findings in this study includes more-accurate predictions of velocity profile and frictional pressure loss in the annulus, which lead to better predictions of barite sag, cuttings transport, equivalent circulating density, and mud cement displacement in special cases of cementing operations.