bluuebunny/crossref_metadata_2025_split huggingface dataset:
Shock Sensitivity of Pressed RDX‐Based Plastic Bonded Explosives under Short‐Duration and High‐Pressure Impact Tests
Authors: Li Tao , Hua Cheng , Li Qiang 
Published: August 2013

AbstractThe shock sensitivities of plastic bonded explosives were studied with a thin flyer impact test by using two types of pressed RDX. The thin flyer, driven by an electrically exploding plasma, exerts a short‐duration, high‐pressure pulse to the samples to trigger a shock‐to‐detonation process. It was found that the duration and magnitude of the incident shock strongly influence the dominant mode of hot‐spot formation, promoting a fast pore collapsing mechanism while suppressing other slower shear or friction mechanisms, as proposed by Chakravarty et al. [1]. The pressed PBX based on reduced sensitivity RDX had higher shock threshold pressure, compared to the pressed PBX based on commercial RDX. The difference was observed even with a certain portion of external extragranular defects. It is postulated that the internal crystal defects are more efficient than the external porosity in terms of the rapid reaction of hot spots.
Experimental Diagnosis on Frictional Initiation of a Match Head Composition at Different Contact Materials
Authors: Sivapirakasam Suthandathan Paramashivan , Nalla Mohamed Mohamed Ismail Nalla , Surianarayanan Mahadevan 
Published: August 2013

AbstractThe mechanism of initiation is essential to enumerate the sensitivity and evaluate the risks associated with energetic mixtures. To understand the mechanism of initiation under frictional loading, the initiation events such as initiating time and critical load have to be evaluated. This study aims to assess experimentally the initiation mechanism under frictional load by measuring the event of initiation and the critical load using a modified version of the BAM friction tester augmented with a press force sensor, an accelerometer and a photodiode arrangement. Differences in the range of diagnostics were identified for various material interactions. The data generated have the implications for assessing the safety of energetic mixtures.
Delaunay‐based nonlocal interactions are sufficient and accurate in protein fold recognition
Authors: Mirzaie Mehdi , Sadeghi Mehdi 
Published: August 2013

ABSTRACTThis study is aimed at showing that considering only nonlocal interactions (interactions of two atoms with a sequence separation larger than five amino acids) extracted using Delaunay tessellation is sufficient and accurate for protein fold recognition. An atomic knowledge‐based potential was extracted based on a Delaunay tessellation with 167 atom types from a sample of the native structures and the normalized energy was calculated for only nonlocal interactions in each structure. The performance of this method was tested on several decoy sets and compared to a method considering all interactions extracted by Delaunay tessellation and three other popular scoring functions. Features such as the contents of different types of interactions and atoms with the highest number of interactions were also studied. The results suggest that considering only nonlocal interactions in a Delaunay tessellation of protein structure is a discrete structure catching deep properties of the three‐dimensional protein data. Proteins 2014; 82:415–423. © 2013 Wiley Periodicals, Inc.
Electric field manipulated reversible hydrogen storage in graphene studied by DFT calculations
Authors: Ao Zhimin , Li Sean 
Published: August 2013

AbstractEnhancement of hydrogen storage capacity is a great challenge that the research community is facing. The challenge lies on the fact of interdependence of hydrogen storage and release processes. It presents that the hydrogen release would be difficult if the hydrogen can be stored easily or vice versa. This work strategically tackles this critical issue through density functional theory (DFT) calculations by applying defect engineering on graphene, and also changing the hydrogenation/dehydrogenation and hydrogen diffusion chemical potentials via applying electric field. It is found that hydrogen molecules are dissociatively adsorbed on N‐doped graphene spontaneously in the presence of a perpendicular electric field F. After adsorption, H atoms diffuse on N‐doped graphene surface with low energy barrier and the graphene can be fully hydrogenated. By removing the electric filed, the stored hydrogen can be released efficiently under ambient conditions. It demonstrates that the N‐doped graphene is a promising hydrogen storage material with the storage capacity up to 6.73 wt%. The electric field can act as a switch for hydrogen uptake/release processes.
Description of the superconducting state in the high‐pressure fcc phase of platinum‐hydride
Authors: Szcześniak R. , Szcześniak D. , Huras K. M. 
Published: August 2013

AbstractThe thermodynamic parameters of the superconducting state in PtH at the pressure 76GPa have been examined. The calculations have been carried out in the framework of the Eliashberg formalism. It has been found that the critical temperature () changes in the range from to K, depending on the assumed value of the Coulomb pseudopotential: . The other thermodynamic quantities differ significantly from the predictions of the classical BCS theory. In particular: (i) the parameter reaches the values from to , where denotes the low‐temperature order parameter. (ii) The ratio of the specific heat jump () to the specific heat in the normal state () takes the values from to . (iii) Finally, , where is the low‐temperature thermodynamic critical field.
On false data injection attacks against Kalman filtering in power system dynamic state estimation
Authors: Yang Qingyu , Chang Liguo , Yu Wei 
Published: August 2013

AbstractState estimation is a very critical component in smart grid, a typical energy‐based cyber‐physical system. Kalman filter has been widely used in the dynamic state estimation of power systems. Although a large number of research efforts have been made on the robustness and filtering effectiveness, little effort has been conducted on cyber attacks against Kalman filtering. To address this issue, in this paper we systematically compare three representative Kalman filtering techniques and formalize the problem of anomaly detection against false data injection attacks in Kalman filter. On the basis of our modeling results, we investigate five novel attack approaches that can bypass the anomaly detection. To defend against those attacks, we develop two countermeasures: the enhancement of Kalman filtering and the temporal‐based detection algorithm. We conduct extensive performance evaluation and our data validates our theoretical finding well. Copyright © 2013 John Wiley & Sons, Ltd.
Insights into the roles of exogenous glutamate and proline in improving streptolydigin production ofStreptomyces lydicuswith metabolomic analysis
Authors: Cheng Jing-Sheng , Cui Shao-Fei , Ding Ming-Zhu , Yuan Ying-Jin 
Published: August 2013

AbstractThe addition of precursors was one strategy to improve antibiotic production. The exogenous proline and glutamate, as precursors of streptolydigin, could significantly improve the streptolydigin production, but their underlying molecular mechanisms remain unknown. Herein, metabolomic analysis was carried out to explore the metabolic responses of Streptomyces lydicus to the additions of proline and glutamine. The significant differences in the quantified 53 metabolites after adding the exogenous proline and glutamate were enunciated by gas chromatography coupled to time-of-flight mass spectrometry. Among them, the levels of some fatty acids (e.g., dodecanoic acid, octadecanoic acid, hexadecanoic acid) were significantly decreased after adding glutamate and proline, indicating that the inhibition of fatty acid synthesis might be benefit for the accumulation of streptolydigin. Particularly, the dramatic changes of the identified metabolites, which are involved in glycolysis, the tricarboxylic acid cycle, and the amino acid and fatty acid metabolism, revealed that the additions of glutamate and proline possibly caused the metabolic cross-talk in S. lydicus. Additionally, the level of intracellular glutamate dramatically enhanced at 12 h after adding proline, showing that exogenous proline may be firstly convert into glutamate and consequently result in crease of the streptolydigin production. The high levels of streptolydigin at 12 and 24 h after adding glutamate unveiled that part glutamate were rapidly used to synthesize the streptolydigin. Furthermore, there is the significant difference in metabolomic characteristics of S. lydicus after adding glutamate and proline, uncovering that multiple regulatory pathways are involved in responses to the additions of exogenous glutamate and proline. Taken together, exogenous glutamate and proline not only directly provided the precursors of streptolydigin biosynthesis, but also might alter the metabolic homeostasis of S. lydicus E9 during improving the production of streptolydigin.
Maternal effect on seed survival and emergence in Cytisus scoparius: an experimental approach
Authors: Magda Danièle , Gleizes Benoit , Jarry Marc 
Published: August 2013

AbstractThe role of the individual origin of seeds in the variability of demographic parameters within a seed‐bank has been little studied despite the recognition of its important contribution to species adaptation strategies to environmental constraints. This study analyzed the seed‐bank dynamics of Cytisus scoparius, a small woody species with a high aptitude for colonization and dominance. Our experimental setup made it possible to monitor seed emergence dynamics in situ for maternal individuals within the study population. In addition to the characteristic traits of the species (maximum seed life span between 4 and 5 years in 75 % of the cases), there was a high variability of the emergence dynamics between individuals, distinguished both by their total emergence rate and profile. The total emergence rate of seeds was correlated with their quality (seed weight and number of seeds per pod), but was unrelated to either maternal age or fecundity. Different emergence profiles can be recognized between two distinct patterns: on one hand, a strategy that concentrates on emergence in the second year and, on the other, a regular decrease of the germinant number over time. The coexistence of different seed‐bank strategies between individuals results in the ability for the population to face to disturbances and environmental variability.
Quantification of Phospholipids Classes in Human Milk
Authors: Giuffrida Francesca , Cruz‐Hernandez Cristina , Flück Brigitte , Tavazzi Isabelle , Thakkar Sagar K. , Destaillats Frédéric , Braun Marcel 
Published: August 2013

AbstractPhospholipids are integral constituents of the milk fat globule membranes and they play a central role in infants' immune and inflammatory responses. A methodology employing liquid chromatography coupled with evaporative light scattering detector has been optimized and validated to quantify the major phospholipids classes in human milk. Phospholipids were extracted using chloroform and methanol and separated on C18 column. Repeatability, intermediate reproducibility, and recovery values were calculated and a large sample set of human milk analyzed. In human milk, phospholipid classes were quantified at concentrations of 0.6 mg/100 g for phosphatidylinositol; 4.2 mg/100 g for phosphatidylethanolamine, 0.4 mg/100 g for phosphatidylserine, 2.8 mg/100 g for phosphatidylcholine, and 4.6 mg/100 g for sphingomyelin. Their relative standard deviation of repeatability and intermediate reproducibility values ranging between 0.8 and 13.4 % and between 2.4 and 25.7 %, respectively. The recovery values ranged between 67 and 112 %. Finally, the validated method was used to quantify phospholipid classes in human milk collected from 50 volunteers 4 weeks postpartum providing absolute content of these lipids in a relatively large cohort. The average content of total phospholipids was 23.8 mg/100 g that corresponds to an estimated mean intake of 140 mg phospholipids/day in a 4‐week old infant when exclusively breast‐fed.
The interplay of genotype and environment in the development of fear and anxiety
Authors: Sachser N. , Lesch K.-P. 
Published: August 2013

AbstractIndividual differences in fear, anxiety, and the etiology of anxiety disorders develop dur­ing ontogeny. They are due to both genet­ic and environmental factors. With regard to the role of the environment, the organism is most susceptible to external influences dur­ing early development. Accordingly, stressors that impinge on the maternal organism dur­ing pregnancy evoke high levels of anxiety in the offspring later in life, as does an adverse early postnatal environment. However, anxi­ety-related circuits in the central nervous sys­tem retain their plasticity in adulthood, i.e., levels of anxiety can also be modified by ex­perience across the entire successive lifespan. Notably, the effects of external stressors on the individual’s level of anxiety are modulat­ed by genotype. Such genotype-by-environ­ment interactions are particularly well stud­ied in relation to genetic variants that modu­late the function of the serotonin transport­er. Thus, this review focuses on this candidate gene to elucidate the interplay of genotype and environment in the development of fear and anxiety.
Advances in diagnosis and spatial analysis of cysticercosis and taeniasis
Authors: RAOUL FRANCIS , LI TIAOYING , SAKO YASUHITO , CHEN XINGWANG , LONG CHANGPING , YANAGIDA TETSUYA , WU YUNFEI , NAKAO MINORU , OKAMOTO MUNEHIRO , CRAIG PHILIP S. , GIRAUDOUX PATRICK , ITO AKIRA 
Published: August 2013

SUMMARYHuman cysticercosis, caused by accidental ingestion of eggs ofTaenia solium, is one of the most pathogenic helminthiases and is listed among the 17 WHO Neglected Tropical Diseases. Controlling the life-cycle ofT. soliumbetween humans and pigs is essential for eradication of cysticercosis. One difficulty for the accurate detection and identification ofT. soliumspecies is the possible co-existence of two other humanTaeniatapeworms (T. saginataandT. asiatica, which do not cause cysticercosis in humans). Several key issues for taeniasis/cysticercosis (T/C) evidence-based epidemiology and control are reviewed: (1) advances in immunological and molecular tools for screening of human and animals hosts and identification ofTaeniaspecies, with a focus on real-time detection of taeniasis carriers and infected animals in field community screenings, and (2) spatial ecological approaches that have been used to detect geospatial patterns of case distributions and to monitor pig activity and behaviour. Most recent eco-epidemiological studies undertaken in Sichuan province, China, are introduced and reviewed.
Narratives of vicarious experience in conversation
Authors: Norrick Neal R. 
Published: August 2013

AbstractStories of personal experience have been a staple of research on narrative, while stories of vicarious experience have remained largely ignored, though they offer special insights into issues of epistemic authority, telling rights, and evaluation. This article seeks to show that stories of vicarious experience can fulfill the same functions as stories of personal experience in conversation, illustrating a point in an argument, sharing news, and for their entertainment value. Discrepancies between stories of vicarious experience and stories of personal experience follow from the distinction between third person and first person narrative along with corresponding differences in their participation frameworks in the sense of Goffman (1981): conversationalists cannot deploy third person stories of vicarious experience in functions such as mutual self-disclosure or to display resistance to troubles; conversely, stories of vicarious experience offer greater opportunities for co-narration. (Epistemic authority, evaluation, identity, narrative, participation frameworks, telling rights, vicarious experience)
Modelling future changes of habitat and fauna in the Tonle Sap wetland of the Mekong
Authors: ARIAS MAURICIO E. , COCHRANE THOMAS A. , ELLIOTT VITTORIA 
Published: August 2013

SUMMARYThe Tonle Sap is the largest wetland in South-east Asia and the heart of the largest inland fishery in the world. Its unique flood pulse system and annual flow reversal is a hotspot for biodiversity and productivity, as well as an essential habitat for many endangered fishes and birds. Despite predicted changes to the wetland's hydrology due to climate change and hydropower development in the Mekong, the consequent impacts on the fauna of the lake are poorly understood. A spatial modelling framework was developed to simulate the impact of potential scenarios of change using relationships between fauna and biophysical characteristics. Potential impacts on 61 animal species with documented nutritional, conservation or ecological value were examined. A large number of species rely on gallery forest to provide important habitats for their life history, yet this area is likely to be highly impacted by permanent inundation. There is a strong synchronicity between life histories and the flood pulse; consequently continued hydrological disruptions will have a significant impact on ecosystem dynamics, imposing further challenges to conservation. Protecting areas that may become suitable for gallery forests and shrublands under a modified flood regime will be crucial to management planning and the maintenance of a diverse and healthy ecosystem.
Prolonged mechanical ventilation associated with hypothyroidism after paediatric cardiac surgery
Authors: Tanidir Ibrahim C. , Unuvar Tolga , Haydin Sertac 
Published: August 2013

AbstractHypothyroidism in patients undergoing congenital heart defect surgery is known to be possible. This generally temporary condition can progress as it involves yet other factors, increasing the patients’ time to heal. The case presented here is that of a 5-month-old girl who was dependent in the long term on mechanical ventilation following cardiac surgery. After having been diagnosed with hypothyroidism, she was extubated on the fourth day of her hormone replacement therapy, and discharged from hospital on the tenth day.
Does development reduce fatalities from natural disasters? New evidence for floods
Authors: Ferreira Susana , Hamilton Kirk , Vincent Jeffrey R. 
Published: August 2013

AbstractWe analyze the impact of development on flood fatalities using a new data set of 2,171 large floods in 92 countries between 1985 and 2008. Our results challenge the conventional wisdom that development results in fewer fatalities during natural disasters. Results indicating that higher income and better governance reduce fatalities during flood events do not hold up when unobserved country heterogeneity and within-country correlation of standard errors are taken into account. We find that income does have a significant, indirect effect on flood fatalities by affecting flood frequency and flood magnitude, but this effect is nonmonotonic, with net reductions in fatalities occurring only in lower income countries. We find little evidence that improved governance affects flood fatalities either directly or indirectly.
Assessment of Metal Pollution Sources by SEM/EDS Analysis of Solid Particles in Snow: A Case Study of Žerjav, Slovenia
Authors: Miler Miloš , Gosar Mateja 
Published: August 2013

AbstractSolid particles in snow deposits, sampled in mining and Pb-processing area of Žerjav, Slovenia, have been investigated using scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS). Identified particles were classified as geogenic–anthropogenic, anthropogenic, and secondary weathering products. Geogenic–anthropogenic particles were represented by scarce Zn- and Pb-bearing ore minerals, originating from mine waste deposit. The most important anthropogenic metal-bearing particles in snow were Pb-, Sb- and Sn-bearing oxides and sulphides. The morphology of these particles showed that they formed at temperatures above their melting points. They were most abundant in snow sampled closest to the Pb-processing plant and least abundant in snow taken farthest from the plant, thus indicating that Pb processing was their predominant source between the last snowfall and the time of sampling. SEM/EDS analysis showed that Sb and Sn contents in these anthropogenic phases were higher and more variable than in natural Pb-bearing ore minerals. The most important secondary weathering products were Pb- and Zn-containing Fe-oxy-hydroxides whose elemental composition and morphology indicated that they mostly resulted from oxidation of metal-bearing sulphides emitted from the Pb-processing plant. This study demonstrated the importance of single particle analysis using SEM/EDS for differentiation between various sources of metals in the environment.
FIB-SEM: An Additional Technique for Investigating Internal Structure of Pollen Walls
Authors: House Alisoun , Balkwill Kevin 
Published: August 2013

AbstractPollen grain morphology has been widely used in the classification of the Acanthaceae, where external pollen wall features have proved useful in determining relationships between taxa. Although detailed information has been accumulated using light microscopy, transmission electron microscopy and scanning electron microscopy (SEM) techniques, internal pollen wall features lack investigation and the techniques are cumbersome. A new technique involving precise cross sectioning or slicing of pollen grains at a selected position for examining wall ultrastructure, using a focused ion beam-scanning electron microscope (FIB-SEM), has been explored and promising results have been obtained. The FIB-SEM offers a good technique for reliable, high resolution, three-dimensional (3D) viewing of the internal structure of the pollen grain wall.
Pawlowsch-Instrumentelle Transfereffekte bei Alkoholabhängigkeit
Authors: Genauck Alexander , Huys Quentin J. M. , Heinz Andreas , Rapp Michael A. 
Published: August 2013

Hintergrund: Alkoholabhängigkeit ist eine Verkettung ungünstiger Entscheidungen in Bezug auf Alkoholkonsum. Dieses Entscheidungsmuster scheint sich u. a wegen pawlowsch-instrumentellen Transfereffekten (PIT-Effekten) immer wieder zu reproduzieren. Ziel dieser Literaturzusammenschau ist, wichtige Befunde zum Zusammenhang zwischen PIT-Effekten und Suchterkrankungen zusammenzutragen und offene Fragen im Hinblick auf PIT bei Alkoholabhängigkeit aufzuzeigen. Methoden: Die Literaturzusammenschau nutzte keine systematische Literaturrecherche, sondern basierte auf den Recherchen im Rahmen der Forschergruppe 1617 (Learning and Habitization in Alcohol Dependence, LeAD) der Deutschen Forschungsgemeinschaft (DFG). Ergebnisse: PIT-Effekte könnten im Zusammenhang mit Alkoholabhängigkeit möglicherweise zu einem Teufelskreis führen. Dieser besteht aus der Verstärkung von PIT-Effekten durch Alkoholkonsum und verstärktem Alkoholkonsum aufgrund von verstärkten PIT-Effekten. Diskussion: PIT-Effekte bei Alkoholabhängigkeit sind bisher vorwiegend aus Tierstudien bekannt. Das PIT-Paradigma kann uns allerdings auch in der humanen Suchtforschung Aufschluss darüber geben, wie bestimmte Reizmuster Alkoholabhängige zum wiederholten Alkoholkonsum motivieren. Demnach können PIT-Experimente womöglich auch helfen Alkoholrückfälle vorherzusagen.