bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimal analog active filter design using craziness‐based particle swarm optimization algorithm
Authors: De Bishnu Prasad , Kar R. , Mandal D. , Ghoshal S. P. 
Published: November 2014

SummaryBecause of the manufacturing constraints, the optimal selection of passive component values for the design of analog active filter is very critical. As the search on possible combinations in preferred values for capacitors and resistors is an exhaustive process, it has to be automated with high accuracy within short computation time. Evolutionary computation may be an attractive alternative for automatic selection of optimal discrete component values such as resistors and capacitors for analog active filter design. This paper presents an efficient evolutionary optimization approach for optimal analog filter design considering different topologies and manufacturing series by selecting their component values. The evolutionary optimization technique employed is craziness‐based particle swarm optimization (CRPSO). PSO is very simple in concept, easy to implement and computationally efficient algorithm with two main advantages: fast convergence and only a few control parameters. However, the performance of PSO depends on its control parameters and may be influenced by premature convergence and stagnation problem. To overcome these problems, the PSO algorithm has been modified to CRPSO and is used for the selection of optimal passive component values of fourth‐order Butterworth low‐pass analog active filter and second‐order state variable low‐pass filter, respectively. CRPSO performs the dual task of efficiently selecting the component values as well as minimizing the total design errors of low‐pass active filters. The component values of the filters are selected in such a way so that they become E12/E24/E96 series compatible. The simulation results prove that CRPSO efficiently minimizes the total design error with respect to previously used optimization techniques. Copyright © 2014 John Wiley & Sons, Ltd.
The single and multi‐item transshipment problem with fixed transshipment costs
Authors: Noham Reut , Tzur Michal 
Published: November 2014

AbstractThis article deals with supply chain systems in which lateral transshipments are allowed. For a system with two retailers facing stochastic demand, we relax the assumption of negligible fixed transshipment costs, thus, extending existing results for the single‐item case and introducing a new model with multiple items. The goal is to determine optimal transshipment and replenishment policies, such that the total centralized expected profit of both retailers is maximized. For the single‐item problem with fixed transshipment costs, we develop optimality conditions, analyze the expected profit function, and identify the optimal solution. We extend our analysis to multiple items with joint fixed transshipment costs, a problem that has not been investigated previously in the literature, and show how the optimality conditions may be extended for any number of items. Due to the complexity involved in solving these conditions, we suggest a simple heuristic based on the single‐item results. Finally, we conduct a numerical study that provides managerial insights on the solutions obtained in various settings and demonstrates that the suggested heuristic performs very well. © 2014 Wiley Periodicals, Inc. Naval Research Logistics, 61: 637–664, 2014
Autogenerating microsecond solvers for nonlinear MPC: A tutorial using ACADO integrators
Authors: Quirynen R. , Vukov M. , Zanon M. , Diehl M. 
Published: November 2014

SummaryNonlinear model predictive control (NMPC) allows one to explicitly treat nonlinear dynamics and constraints. To apply NMPC in real time on embedded hardware, online algorithms as well as efficient code implementations are crucial. A tutorial‐style approach is adopted in this article to present such algorithmic ideas and to show how they can efficiently be implemented based on the ACADO Toolkit from MATLAB (MathWorks, Natick, MA, USA). Using its code generation tool, one can export tailored Runge–Kutta methods—explicit and implicit ones—with efficient propagation of their sensitivities. The article summarizes recent research results on autogenerated integrators for NMPC and shows how they allow to formulate and solve practically relevant problems in only a few tens of microseconds. Several common NMPC formulations can be treated by these methods, including those with stiff ordinary differential equations, fully implicit differential algebraic equations, linear input and output models, and continuous output independent of the integration grid. One of the new algorithmic contributions is an efficient implementation of infinite horizon closed‐loop costing. As a guiding example, a full swing‐up of an inverted pendulum is considered. Copyright © 2014 John Wiley & Sons, Ltd.
Influence of doping on the optical properties of silicon nanocrystals embedded in SiO2
Authors: Frégnaux Mathieu , Khelifi Rim , Le Gall Yann , Muller Dominique , Mathiot Daniel 
Published: November 2014

AbstractCo‐implantation, with overlapping implantation projected ranges, of Si and doping species (P, As, B) followed by a thermal annealing step is a viable route to form doped Si nanocrystals (NCs) embedded in SiO2. This presentation deals with optical characterizations of both doped and undoped Si‐NC prepared by this method. The NC effective presence in the oxide layer and their crystallinity is verified by Raman spectrometry. Photoluminescence (PL) and PL excitation measurements reveal quantum confinement effects and a gradual PL quenching with increasing dopant concentrations. The measured Stokes shift remains constant and its value ∼ 0.2 eV is almost twice the Si–O vibration energy. This suggests that a possible radiative recombination path is a fundamental transition assisted by a local phonon. Lifetime investigations show that PL time‐decays follow a stretched exponential. Atomic probe tomography analyses demonstrate that n‐type dopants (P, As) are efficiently introduced in the NC core, whereas p‐type dopant (B) are located at the NC/SiO2 interface. All together these experimental observations question on possible different carrier recombination paths in P or As doped NC compared to B one's. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Mesenchymal Progenitors Aging Highlights a miR-196 Switch Targeting HOXB7 as Master Regulator of Proliferation and Osteogenesis
Authors: Candini Olivia , Spano Carlotta , Murgia Alba , Grisendi Giulia , Veronesi Elena , Piccinno Maria Serena , Ferracin Manuela , Negrini Massimo , Giacobbi Francesca , Bambi Franco , Horwitz Edwin Mark , Conte Pierfranco , Paolucci Paolo , Dominici Massimo 
Published: November 2014

Abstract
Human aging is associated with a decrease in tissue functions combined with a decline in stem cells frequency and activity followed by a loss of regenerative capacity. The molecular mechanisms behind this senescence remain largely obscure, precluding targeted approaches to counteract aging. Focusing on mesenchymal stromal/stem cells (MSC) as known adult progenitors, we identified a specific switch in miRNA expression during aging, revealing a miR-196a upregulation which was inversely correlated with MSC proliferation through HOXB7 targeting. A forced HOXB7 expression was associated with an improved cell growth, a reduction of senescence, and an improved osteogenesis linked to a dramatic increase of autocrine basic fibroblast growth factor secretion. These findings, along with the progressive decrease of HOXB7 levels observed during skeletal aging in mice, indicate HOXB7 as a master factor driving progenitors behavior lifetime, providing a better understanding of bone senescence and leading to an optimization of MSC performance. Stem Cells 2015;33:939–950
Solvothermal Syntheses and Characterizations of Selenidostannate Salts of Transition Metal Complex Cations: Conformational Flexibility of the Lamellar [Sn3Se72–]n Anion
Authors: Lu Jialin , Shen Yali , Wang Fang , Tang Chunying , Zhang Yong , Jia Dingxian 
Published: November 2014

AbstractThe selenidostannates [Mn(dien)2]Sn3Se7·0.5H2O (1), [Fe(tatda)]Sn3Se7 (2), and [Mn(dien)2]2Sn2Se6 (3) (dien = diethylenetriamine, tatda = 3, 6,9, 12‐tetraazatetradecane‐1, 14‐diamine) were prepared under solvothermal conditions. In compounds 1 and 2, the six Sn3Se4 semi‐cubes are bridged by double μ2‐Se atoms to form the [Sn3Se72–]n lamellar anion containing a elliptical 24‐membered Sn12Se12 ring, which show conformational flexibility of the 2D [Sn3Se72–]n anion influenced by the counter cation. The [Mn(dien)2]2+ complex ion in 1 is in mer configuration. The [Fe(tatda)]2+ complex ion possesses similar configuration to the [Mn(dien)2]2+ ion in 1. The [Mn(dien)2]2+ and [Fe(tatda)]2+ cations are located between the [Sn3Se72–]n layers. Compound 3 consists of dimeric [Sn2Se6]4– anions and octahedral [Mn(dien)2]2+ complex cations with u‐fac configuration. Compounds 1–3 have potential for uses as semiconductors with bandgaps in the range of 1.89–2.34 eV.
About the Syntheses of Chalcogenidometalates by in‐situ ­Reduction with Elemental Alkali Metals
Authors: Thiele Günther , Vondung Lisa , Dehnen Stefanie 
Published: November 2014

AbstractReduction of chalcogen‐rich Pb:Ch (1:2) phases in ethane‐1,2‐diamine (en) by elemental alkali metals results in the formation of solutions of [Pb2Ch3]2– of high purity and abundance. In contrast, application of the same reaction conditions to a binary Bi:Te (1:2) phase yields the mononuclear [BiTe3]3– anion. Instead of the expected [Tl2Te3]4– or [Tl2Te2]2– anions, analogous reactions with a Tl:Te (1:1) phase end up with a C–C‐bond cleavage of the solvent en with formation of a salt of the telluridocyanate (N≡C–Te)– anion. Side reactions of en and elemental cesium are presented and metalate solutions are investigated with NMR spectroscopy.
Thioredoxin: A novel, independent diagnosis marker in children with autism
Authors: Zhang Qing‐biao , Gao Si‐ju , Zhao Hong‐xiang 
Published: November 2014

AbstractBackgroundOxidative stress increases serum thioredoxin (TRX), a redox‐regulating protein with antioxidant activity recognized as an oxidative‐stress marker. The aim of this study was to assess the clinical significance of serum TRX levels in Autism spectrum disorders (ASD).MethodsEighty patients diagnosed with ASD and 100 sex and age matched typically developing children were assessed for serum TRX content at admission. TRX were assayed with solid‐phase sandwich ELISA, and severity of ASD was evaluated with the Childhood Autism Rating Scale (CARS) Score.ResultsThe results indicated that the median serum TRX levels were significantly (P < 0.0001) higher in children with ASD as compared to typically developing children [17.9(IQR: 10.7–25.8) ng/ml and 5.5(3.6–9.2) ng/ml, respectively]. Levels of TRX increased with increasing severity of ASD as defined by the CARS score. After adjusting for all other possible covariates, TRX still was an independent diagnosis marker of ASD with an adjusted OR of 1.454 (95% CI, 1.232–1.892; P < 0.0001). Based on the receiver operating characteristic (ROC) curve, the optimal cut‐off value of serum TRX levels as an indicator for auxiliary diagnosis of autism was projected to be 10.6 ng/ml. Further, we found that an increased diagnosis of ASD was associated with TRX levels ≥10.6 ng/ml (adjusted OR 15.31, 95% CI: 7.36–31.85) after adjusting for possible confounders.ConclusionsOur study demonstrated that serum TRX levels were associated with ASD, and elevated levels could be considered as a novel, independent diagnosis indicator of ASD.
Formation of iron minerals on zeolite matrix
Authors: Kondratyeva L.M. , Golubeva E.M. 
Published: November 2014

Abstract
We present results of a two-year research experiment on the processes involving iron–manganese bacteria at different biogeochemical barriers. Analysis of experimental samples was carried out on a scanning electron microscope (EVO-40HV, Carl Zeiss) and an X-ray diffractometer (Rigaku MiniFlexII). It is shown that goethite can form in vitro in the presence of iron-containing groundwater and iron–manganese bacteria.
Biogenic components of the Baltic Sea sediments
Authors: Emelyanov E.M. 
Published: November 2014

Abstract
The contents of biogenic components in 1511 samples of the Baltic Sea sediments (depth range 0–5 cm) are studied, and maps of their distribution are compiled. The sediments contain ≤ 13.03% Corg, ≤ 1.33% N, ≤ 9.0% SiO2am, ≤ 5.0% CaCO3, and ≤ 1.45% P. The maximum and elevated contents of components are found in the mud of the sea deeps. The more fraction &lt; 0.01 mm the sediments contain, the higher are the contents of components. Four facies types of carbonaceous mud, precursors of shales, have been recognized: (1) shallow-water (lagoon) lime sapropel, (2) carbonaceous mud of the shallow-water Gulf of Finland, (3) carbonaceous mud of the middle-depth Baltic Sea, and (4) laminated carbonaceous metal-bearing mud. The latter type of mud is strongly enriched in manganese and ore-forming trace elements, which points to its formation in the stagnant environment. In composition the Baltic Sea mud is similar to petroliferous mudstones of the Bazhenov Formation in West Siberia and to ancient black shales.
The oil and gas contents of the Lower Jurassic and Achimovka reservoirs of the Nyurol’ka megadepression
Authors: Isaev V.I. , Lobova G.A. , Osipova E.N. 
Published: November 2014

Abstract
The paper describes Lower Jurassic (horizons J16 and J15) and Achimovka (Neocomian clinoforms) reservoirs in the area of the Nyurol’ka megadepression and its framing (42,000 km2). The total thicknesses of seven Achimovka sedimentary cycles are mapped. The thermal history of the Togur and Bazhenov parental sediments in the sections of 39 deep wells is reconstructed by paleotemperature modeling. The geotemperature criterion is used to identify paleosources of oil generation, starting from the Jurassic. The distribution of the relative density of the resources of the generated Togur and Bazhenov oils is estimated and shown on sketch maps. The Lower Jurassic reservoir is divided into zones depending on the distribution of the relative density of the Togur oil resources, and the Achimovka reservoir, of the Bazhenov oil resources. The priority oil search zones are proposed.
Recent tectonics and seismicity of the western Altai–Sayan mountainous region, Junggar basin, and Chinese Tien Shan
Authors: Novikov I.S. , Dyad’kov P.G. , Kozlova M.P. , Mamedov G.M. , Mikheeva A.V. , Cherkas O.V. 
Published: November 2014

AbstractAccording to GPS monitoring, recent tectonic process between Tarim and West Siberia in the band within 80°–95° E is generated by the northward movement of the Tarim block. During the accompanying horizontal compression of the area, orogeny takes place within linear mobile zones when blocks are squeezed into the upper half-space. When the orientation of the mobile zones is transverse to the compression direction, the leading orogenic process is reverse faulting. When these directions intersect at an acute angle, the principal features of the mountain relief are formed by oblique-slip and strike-slip faults.The spatial distribution of seismic activity A10 over a 40-year period of instrumental observations within the mobile zones of the study area is extremely nonuniform. Seismic activity increases to the south, toward the source of deformations—the Indo-Eurasian collision. The maximum activity is observed at the reverse-fault boundaries of the eastern Tien Shan (~40). The seismic activity of the strike-slip fault boundaries of the Great Altai is considerably lower (0.11–0.16).
Mineralogical, petrophysical, and acoustic features of serpentinites, indicators of the paleodynamic conditions of their genesis (by the example of the Main Uralian Fault zone)
Authors: Panasyan L.L. , Posukhova T.V. , Cherepetskaya E.B. , Jini Zhang 
Published: November 2014

Abstract
The composition, structure, and properties of different genetic types of serpentinites developed after ultrabasic rocks are studied. The rocks were sampled from massifs located along the Main Uralian Fault, in a Paleozoic subduction zone. We consider specific features of serpentinites developed after chromite-bearing ultrabasic rocks, in metamorphic zones of carbonate rocks, and within the zone of weathering of ultrabasic rocks. A comparative study of the microstructure and chemical and phase compositions of serpentinites is carried out by IR spectroscopy, scanning electron microscopy, and thermal, X-ray diffraction, and microprobe analyses. The petrophysical properties and acoustic emission of the rocks are examined. Several genetic and structural groups of serpentinites developed after different protoliths (mantle and crustal) in different geologic conditions are recognized.
© 2014, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.
Spontaneous generation of a swirling plume in a stratified ambient
Authors: Marques Francisco , Lopez Juan M. 
Published: November 2014

AbstractThe transition from laminar to complex spatio-temporal dynamics of plumes due to a localized buoyancy source is studied numerically. Several experiments have reported that this transition is sensitive to external perturbations. Therefore, a well-controlled set-up has been chosen for our numerical study, consisting of a localized heat source at the bottom of an enclosed cylinder whose sidewall is maintained at a fixed temperature which varies linearly up the wall. Restricting the dynamics to the axisymmetric subspace, the first instability is to a puffing state. However, for smaller Grashof numbers, the plume becomes unstable to three-dimensional perturbations and a swirling plume spontaneously appears. The next bifurcation, viewed in the rotating frame where the plume is stationary, also exhibits puffing and suggests a connection between the unstable axisymmetric puffing solution and the swirling plume. Further bifurcations result in quasi-periodic states with a very low-frequency modulation, and these eventually become spatio-temporally complex.
Multi-character approach reveals a discordant pattern of phenotypic variation during ontogeny inCulex pipiensbiotypes (Diptera: Culicidae)
Authors: Krtinić B. , Ludoški J. , Milankov V. 
Published: November 2014

AbstractCulex(Culex)pipienss.l. (Diptera: Culicidae) comprises two distinct biotypes,pipiens(‘rural’) andmolestus(‘urban’), both of which are thought to have differing capacities due to different host preferences. To better understand West Nile encephalitis epidemiology and improve risk assessment, local distinction between these forms is essential. This study assesses phenotypic variation at larval and adult stages of ‘urban’ and ‘rural’ biotypes of the species by complementary use of meristic, univariate and multivariate traits analyzed by traditional and geometric morphometrics. Third- and fourth-instar larvae from a broad area of the city of Novi Sad (Serbia) were collected and reared in the laboratory. After adult eclosion, the sex of each larva was recorded based on the sex of the corresponding adult. Examination of the association between variations of larval traits revealed contrasting variations regarding pecten spines vs. siphonal size and siphonal shape in the ‘rural’ biotype. Siphons of larvae collected in marshes and forest ecosystems outside urban areas were found to be the largest, but possessed the smallest number of pecten spines. In addition, statistically significant female-biased sexual dimorphism was observed in siphonal size, wing size and wing shape. Finally, we propose that an integrative approach is essential in delimitation ofCx. pipienss.l. biotypes, since their differentiation was not possible based solely on larval and adult traits. Our findings shed light on the phenotypic plasticity important for population persistence in the changing environment of these medically important taxa.
Investigation of genetic variants in ubiquitin enzyme genes involved in the modulation of neurodevelopmental processes: a role in schizophrenia susceptibility?
Authors: ANDREWS JESSICA L. , FERNANDEZ-ENRIGHT FRANCESCA 
Published: November 2014

SummaryDespite extensive research during the last few decades, the etiology of schizophrenia remains unclear. Evidence of both genetic and environmental influences in the developmental profile of schizophrenia has grown, and due to the complexity of this disorder, a polygenic aspect has been associated with this neuropsychiatric pathology. Unfortunately, no diagnostic strategies based on biological measurement or genetic testing is currently available for schizophrenia. Gene-expression profiling and recent protein studies have shown a decrease in the expression of ubiquitin pathway proteins in the prefrontal cortex of schizophrenia patients. We have examined single nucleotide polymorphisms (or SNPs) within three genes from the ubiquitin protein system: the ubiquitin conjugating enzyme E2D1 (UBE2D1) gene, the E3 SUMO-protein ligase protein inhibitor of activated STAT 2 (PIAS2) gene, and the E3 ubiquitin ligase F-box and leucine-rich repeat protein 21 (FBXL21) gene, in a Caucasian case–control population for schizophrenia. After Bonferroni correction for multiple testing was applied, no significant associations were reported for any of the tested SNPs. Additional genetic analyses will be necessary to fully explore the role of these three genes in schizophrenia. Regarding the rising interest in ubiquitin-related proteins as a therapeutic target in other pathologies such as cancer, further research into the role of ubiquitin pathways in schizophrenia seems topical and timely.
Altered cortical-amygdala coupling in social anxiety disorder during the anticipation of giving a public speech
Authors: Cremers H. R. , Veer I. M. , Spinhoven P. , Rombouts S. A. R. B. , Yarkoni T. , Wager T. D. , Roelofs K. 
Published: November 2014

BackgroundSevere stress in social situations is a core symptom of social anxiety disorder (SAD). Connectivity between the amygdala and cortical regions is thought to be important for emotion regulation, a function that is compromised in SAD. However, it has never been tested if and how this connectivity pattern changes under conditions of stress-inducing social evaluative threat. Here we investigate changes in cortical-amygdala coupling in SAD during the anticipation of giving a public speech.MethodTwenty individuals with SAD and age-, gender- and education-matched controls (n = 20) participated in this study. During the functional magnetic resonance imaging (fMRI) session, participants underwent three ‘resting-state’ fMRI scans: one before, one during, and one after the anticipation of giving a public speech. Functional connectivity between cortical emotion regulation regions and the amygdala was investigated.ResultsCompared to controls, SAD participants showed reduced functional integration between cortical emotion regulation regions and the amygdala during the public speech anticipation. Moreover, in SAD participants cortical-amygdala connectivity changes correlated with social anxiety symptom severity.ConclusionsThe distinctive pattern of cortical-amygdala connectivity suggests less effective cortical-subcortical communication during social stress-provoking situations in SAD.