bluuebunny/crossref_metadata_2025_split huggingface dataset:
The role of streamers in the deflection of coronal mass ejections
Authors: Zuccarello F. P. , Bemporad A. , Jacobs C. , Mierla M. , Poedts S. , Zuccarello F. 
Published: July 2012

AbstractOn 2009 September 21, a filament eruption and the associated Coronal Mass Ejection (CME) was observed by the STEREO spacecraft. The CME originated from the southern hemisphere and showed a deflection of about 15° towards the heliospheric current sheet (HCS) during its propagation in the COR1 field-of-view (FOV). The aim of this paper is to provide a physical explanation for the strong deflection of the CME. We first use the STEREO observations in order to reconstruct the three dimensional (3D) trajectory of the CME. Starting from a magnetic configuration that closely resembles the potential field extrapolation for that date, we performed numerical magneto-hydrodynamics (MHD) simulations. By applying localized shearing motions, a CME is initiated in the simulation, showing a similar non-radial evolution, structure, and velocity as the observed event. The CME gets deflected towards the current sheet of the larger northern helmet streamer, due to an imbalance in the magnetic pressure and tension forces and finally it gets into the streamer and propagates along the heliospheric current sheet.
Coronal ejections from convective spherical shell dynamos
Authors: Warnecke J. , Käpylä P. J. , Mantere M. J. , Brandenburg A. 
Published: July 2012

AbstractWe present a three-dimensional model of rotating convection combined with a simplified model of a corona in spherical coordinates. The motions in the convection zone generate a large-scale magnetic field which is sporadically ejected into the outer layers above. Our model corona is approximately isothermal, but it includes density stratification due to gravity.
Dynamic evolution of interplanetary shock waves driven by CMEs
Authors: Corona-Romero P. , Gonzalez-Esparza J. A. 
Published: July 2012

AbstractWe present a study about the propagation of interplanetary shock waves driven by super magnetosonic coronal mass ejections (CMEs). The discussion focuses on a model which describes the dynamic relationship between the CME and its driven shock and the way to approximate the trajectory of shocks based on those relationships, from near the Sun to 1 AU. We apply the model to the analysis of a case study in which our calculations show quantitative and qualitative agreements with different kinds of data. We discuss the importance of solar wind and CME initial conditions on the shock wave evolution.
Probing the heliosphere with the directional anisotropy of galactic cosmic-ray intensity
Authors: Munakata Kazuoki 
Published: July 2012

AbstractBecause of the large detector volume that can be deployed, ground-based detectors remain state-of-the-art instrumentation for measuring high-energy galactic cosmic-rays (GCRs). This paper demonstrates how useful information can be derived from observations of the directional anisotropy of the high-energy GCR intensity, introducing the most recent results obtained from the ground-based observations. The anisotropy observed with the global muon detector network (GMDN) provides us with a unique information of the spatial gradient of the GCR density which reflects the large-scale magnetic structure in the heliosphere. The solar cycle variation of the gradient gives an important information on the GCR transport in the heliosphere, while the short-term variation of the gradient enables us to deduce the large-scale geometry of the magnetic flux rope and the interplanetary coronal mass ejection (ICME). Real-time monitoring of the precursory anisotropy which has often been observed at the Earth preceding the arrival of the ICME accompanied by a strong shock may provide us with useful tools for forecasting the space weather with a long lead time. The solar cycle variation of the Sun's shadow observed in the TeV GCR intensity is also useful for probing the large-scale magnetic structure of the solar corona.
Search for solar energetic particle signals in the Mexico City neutron monitor database
Authors: Vargas-Cárdenas B. , Valdés-Galicia J. F. 
Published: July 2012

AbstractWe performed a search for ground level solar cosmic ray enhancements on the full five minute database of the Mexico City neutron monitor using wavelet filters and two different statistical tests. We present a detailed analysis of the time series of November 2, 1992, where we found a previously unreported increment matching the onset time of the impulsive phase of the Ground Level Enhancement No. 54, thus providing evidence of an effective detection of high energy solar cosmic rays. This technique may help to find still undiscovered GLE signals in the Worldwide Neutron Monitor Database, to refine GLE spectra and, probably, to find a relationship between the latter and the solar cycle.
A porcupine Sun? Implications for the solar wind and Earth
Authors: Gibson Sarah E. , Zhao Liang 
Published: July 2012

AbstractThe recent minimum was unusually long, and it was not just the case of the “usual story” slowed down. The coronal magnetic field never became completely dipolar as in recent Space Age minima, but rather gradually evolved into an (essentially axisymmetric) global configuration possessing mixed open and closed magnetic structures at many latitudes. In the process, the impact of the solar wind at the Earth went from resembling that from a sequence of rotating “fire-hoses” to what might be expected from a weak, omnidirectional “lawn-sprinkler”. The previous (1996) solar minimum was a more classic dipolar configuration, and was characterized by slow wind of hot origin localized to the heliospheric current sheet, and fast wind of cold origin emitted from polar holes, but filling most of the heliosphere. In contrast, the more recent minimum solar wind possessed a broad range of speeds and source temperatures (although cooler overall than the prior minimum). We discuss possible connections between these observations and the near-radial expansion and small spatial scales characteristic of the recent minimum's porcupine-like magnetic field.
Investigating stellar surface rotation using observations of starspots
Authors: Korhonen Heidi 
Published: July 2012

AbstractRapid rotation enhances the dynamo operating in stars, and thus also introduces significantly stronger magnetic activity than is seen in slower rotators. Many young cool stars still have the rapid, primordial rotation rates induced by the interstellar molecular cloud from which they were formed. Also older stars in close binary systems are often rapid rotators. These types of stars can show strong magnetic activity and large starspots. In the case of large starspots which cause observable changes in the brightness of the star, and even in the shapes of the spectral line profiles, one can get information on the rotation of the star. At times even information on the spot rotation at different stellar latitudes can be obtained, similarly to the solar surface differential rotation measurements using magnetic features as tracers. Here, I will review investigations of stellar rotation based on starspots. I will discuss what we can obtain from ground-based photometry and how that improves with the uninterrupted, high precision, observations from space. The emphasis will be on how starspots, and even stellar surface differential rotation, can be studied using high resolution spectra.
Stellar activity cycles in a model for magnetic flux generation and transport
Authors: Işik Emre 
Published: July 2012

AbstractWe present results from a model for magnetic flux generation and transport in cool stars and a qualitative comparison of models with observations. The method combines an αΩ-type dynamo at the base of the convection zone, buoyant rise of magnetic flux tubes, and a surface flux transport model. Based on a reference model for the Sun, numerical simulations were carried out for model convection zones of G- and K-type main sequence and subgiant stars. We investigate magnetic cycle properties for stars with different rotation periods, convection zone depths, and dynamo strengths. For a Sun-like star with Prot=9 d, we find that a cyclic dynamo can underly an apparently non-cyclic, ‘flat’ surface activity, as observed in some stars. For a subgiant K1 star with Prot=2.8 d the long-term activity variations resemble the multi-periodic cycles observed in V711 Tau, owing to high-latitude flux emergence, weak transport effects and stochastic processes of flux emergence.
Is meridional circulation important in modelling irregularities of the solar cycle?
Authors: Karak Bidya Binay , Choudhuri Arnab Rai 
Published: July 2012

AbstractWe explore the importance of meridional circulation variations in modelling the irregularities of the solar cycle by using the flux transport dynamo model. We show that a fluctuating meridional circulation can reproduce some features of the solar cycle like the Waldmeier effect and the grand minimum. However, we get all these results only if the value of the turbulent diffusivity in the convection zone is reasonably high.
TTVs study in southern stars
Authors: Petrucci Romina , Jofré Emiliano , Schwartz Martín , Buccino Andrea , Mauas Pablo 
Published: July 2012

AbstractIn this contribution we present 4 complete planetary transits observed with the 40-cm telescope “Horacio Ghielmetti” located in San Juan(Argentina). These objects correspond to a continuous photometric monitoring program of Southern planet host-stars that we are carrying out since mid-2011. The goal of this project is to detect additional planetary mass objects around stars with known transiting-planets through Transit Timing Variations (TTVs). For all 4 transits the depth and duration are in good agreement with the values published in the discovery papers.
Bacterial diversity in relation to secondary production and succession on surfaces of the kelp Laminaria hyperborea
Authors: Bengtsson Mia M , Sjøtun Kjersti , Lanzén Anders , Øvreås Lise 
Published: July 2012

Abstract
Kelp forests worldwide are known as hotspots for macroscopic biodiversity and primary production, yet very little is known about the biodiversity and roles of microorganisms in these ecosystems. Secondary production by heterotrophic bacteria associated to kelp is important in the food web as a link between kelp primary production and kelp forest consumers. The aim of this study was to investigate the relationship between bacterial diversity and two important processes in this ecosystem; bacterial secondary production and primary succession on kelp surfaces. To address this, kelp, Laminaria hyperborea, from southwestern Norway was sampled at different geographical locations and during an annual cycle. Pyrosequencing (454-sequencing) of amplicons of the 16S rRNA gene of bacteria was used to study bacterial diversity. Incorporation of tritiated thymidine was used as a measure of bacterial production. Our data show that bacterial diversity (richness and evenness) increases with the age of the kelp surface, which corresponds to the primary succession of its bacterial communities. Higher evenness of bacterial operational taxonomical units (OTUs) is linked to higher bacterial production. Owing to the dominance of a few abundant OTUs, kelp surface biofilm communities may be characterized as low-diversity habitats. This is the first detailed study of kelp-associated bacterial communities using high-throughput sequencing and it extends current knowledge on microbial community assembly and dynamics on living surfaces.
BasyLiCA: a tool for automatic processing of a Bacterial Live Cell Array
Authors: Aïchaoui Leslie , Jules Matthieu , Le Chat Ludovic , Aymerich Stéphane , Fromion Vincent , Goelzer Anne 
Published: July 2012

Abstract
Summary: Live Cell Array (LCA) technology allows the acquisition of high-resolution time-course profiles of bacterial gene expression by the systematic assessment of fluorescence in living cells carrying either transcriptional or translational fluorescent protein fusion. However, the direct estimation of promoter activities by time-dependent derivation of the fluorescence datasets generates high levels of noise. Here, we present BasyLiCA, a user-friendly open-source interface and database dedicated to the automatic storage and standardized treatment of LCA data. Data quality reports are generated automatically. Growth rates and promoter activities are calculated by tunable discrete Kalman filters that can be set to incorporate data from biological replicates, significantly reducing the impact of noise measurement in activity estimations.
Availability: The BasyLiCA software and the related documentation are available at http://genome.jouy.inra.fr/basylica.
Contact: anne.goelzer@jouy.inra.fr
Supplementary Information: Supplementary data are available at Bioinformatics online.
Voronto: mapper for expression data to ontologies
Authors: Santamaría Rodrigo , Pierre Philippe 
Published: July 2012

Abstract
Motivation: Several techniques analyze gene expression data from the point of view of biological ontologies. These methods focus on statistical and numerical analyses, but there is an additional need for fast, global and interactive visualizations of gene expression data in the context of biological ontologies.
Results: Voronto addresses these needs with an easy to use integration of custom gene expression data with custom or public ontologies. In order to do that, it implements Voronoi diagrams where ontologies are mapped with gene expression, providing a quick hierarchy browsing and integration with ontology's resources.
Availability: The tool is available at http://vis.usal.es/voronto. Source code available at https:/github.com/rodrigoSantamaria/Voronto.
Contact: rodri@usal.es
Supplementary information: Supplementary data are available at Bioinformatics online.
Vertical migrations of saithe (Pollachius virens) in Icelandic waters as observed with data storage tags
Authors: Armannsson Hlynur , Jónsson Sigurður Þór 
Published: July 2012

AbstractArmannsson, H., and Jónsson, S. Þ. 2012. Vertical migrations of saithe (Pollachius virens) in Icelandic waters as observed with data storage tags. – ICES Journal of Marine Science, 69: . Knowledge of fish behaviour is important for general understanding of fish life history and responses to environmental and biological conditions. Vertical migrations can affect bottom trawl indices of the fish through their availability to the trawl and acoustic indices through changes in target strength. Here we present results based on data sets of hourly recordings of depth from 51 saithe. The data were analysed with respect to diel and seasonal differences in saithe vertical movement. Duration and extent of vertical movements were analysed with 1 min resolution, and the daily vertical range (DVR) was analysed with respect to potential use of the free vertical range (FVR). Our results show diel and seasonal differences in hourly depth changes of saithe, indicating reduced activity during night-time and in winter. Individual saithe are capable of rapid depth changes in <1 min, often of the same order as the maximum observed in movements of longer duration. The DVR often exceeded the FVR, and in some instances exceeded critical limits, indicating that saithe may at times only maintain neutral buoyancy near the upper limit of their daily vertical range.
Where are we at with point‐ of‐ care testing in haematology?
Authors: Briggs Carol , Kimber Simon , Green Laura 
Published: July 2012

SummaryPoint‐of‐care testing (POCT) in haematology has continued to grow in popularity and uptake throughout the world. The increasing demand to reduce the turnaround time of test results, coupled with rapid improvements in technology, have led to the development of several devices that are designed for use in different clinical settings, with the hope of improving patient care. The most used POCT in haematology is measurement of haemoglobin concentration. Other POCT devices (used primarily in developing countries) for malaria screening and CD4+ T‐lymphocytes for quantification of human‐immunodeficiency‐virus are becoming the cornerstone for the diagnosis and management of these disorders. New devices are also available for red cell indices, white blood cell count and platelets. In this review clinical studies that validate the use of such devices will be discussed, as well as the advantages and disadvantages of POCT in haematology. A disadvantage of POCT is a lack of training, poor standardization in obtaining blood samples and insufficient internal/external quality assessment. As there is every reason to expect that POCT use will increase in all pathology disciplines, including haematology, it is imperative that systems are put in place to oversee these issues.
Phenolic compounds in fruits – an overview
Authors: Haminiuk Charles W. I. , Maciel Giselle M. , Plata‐Oviedo Manuel S. V. , Peralta Rosane M. 
Published: July 2012

SummaryPhenolic compounds are secondary metabolites widely found in fruits, mostly represented by flavonoids and phenolic acids. The growing interest in these substances is mainly because of their antioxidant potential and the association between their consumption and the prevention of some diseases. The health benefits of these phytochemicals are directly linked to a regular intake and their bioavailability. Studies have shown the importance of the regular consumption of fruits, especially for preventing diseases associated with oxidative stress. In the present review, the most recent articles dealing with polyphenols in fruits are reviewed, focusing on their occurrence, main methods of extraction, quantification and antioxidant assays. In addition, the health benefits and bioaccessibility/bioavailability of phenolic compounds in fruits are addressed.
Improving antioxidant activities of whey protein hydrolysates obtained by thermal preheat treatment of pepsin, trypsin, alcalase and flavourzyme
Authors: Lin Suju , Tian Weina , Li He , Cao Jiankang , Jiang Weibo 
Published: July 2012

SummaryAntioxidant activity of whey protein concentrate (WPC) hydrolysates was evaluated. Hydrolysates were obtained by pepsin, trypsin, alcalase and flavourzyme enzymatic reaction and preheat treatment of 95 °C for 5 or 10 min. The degree of hydrolysis (DH) was determined by 2,4,6‐trinitrobenzene sulphonic acid method, and antioxidant properties were determined by three spectrophotometric methods: ferricyanide method, ferric reducing/antioxidant power assay and diphenyl‐picryl hydrazinyl radical‐scavenging activity. For all the enzymes, briefly preheat treatment (95 °C/5 min) increased DH of WPC. Alcalase hydrolysates showed the highest antioxidant activity by three methods. The changes in antioxidant activity was coincidental with the changes in DH (R2 = 0.988). Hydrolysates analysed by polyacrylamide gel electrophoresis and high performance liquid chromatography indicated that the α‐La was hydrolysed completely by pepsin, trypsin and alcalase and was resistant to flavourzyme to some extent; β‐lactoglobulin was only completely hydrolysed by trypsin and alcalase. Results indicated that antioxidant activity of hydrolysates was greatly related to the exposure of amino acid residues.
Antimicrobial activity of chitosan‐based films against Salmonella typhimurium and Staphylococcus aureus
Authors: Rodríguez‐Núñez Jesús R. , López‐Cervantes Jaime , Sánchez‐Machado Dalia I. , Ramírez‐Wong Benjamin , Torres‐Chavez Patricia , Cortez‐Rocha Mario O. 
Published: July 2012

SummaryThe antibacterial effect of polyamide 6/66‐chitosan blend and chitosan‐coated plastic films was compared to chitosan films and chitosan solution, against Salmonella typhimurium and Staphylococcus aureus. The chitosan films did not show inhibition halos; however, contact inhibition was observed. During the tests, the films absorbed moisture, increasing of the diameter discs in relation to the concentration of the chitosan for both microorganisms at least 31%. Chitosan plastic film coating (bilayer system) showed only contact inhibition, without increase in contact area. The films from polyamide 6/66‐chitosan blend had no antibacterial activity. The highest inhibitory effect resulted from a chitosan solution at 1000 and 2000 ppm for S. typhimurium and S. aureus, respectively. The results of this study showed that the antimicrobial activity was lessened when the chitosan was combined with the plastic matrix because of the absence of contact inhibition, and the best activity was obtained with films prepared by casting of chitosan solution.
Before empowerment: residents' memories of the role of the housemother in diaconal residential care settings in Germany 1945–1995
Authors: HÄNDLER‐SCHUSTER D. , SCHULZ M. , BEHRENS J. 
Published: July 2012

Accessible summary

In German institutions for people with mental illness, some woman lived and worked as ‘housemothers’. In the 20th century, they played a very important role. This paper is based on interviews with people who lived in these institutions and looks at their experiences of a place where carers and people with mental illness lived together.

Housemothers often spent decades living and working in the institutions. There are three main phases to their development: (1) ‘Setting out as bride: borrowed power and domination’; (2) ‘Realizing one's potential as a housemother: applied power and domination’; and (3) ‘Leaving the housemother function: lost power and domination’.

The findings show that the housemothers often felt that they did not get enough recognition for what they did from the deacons. Deacons in Germany are ministers in the Protestant Church who also have special training in social care. Housemothers did not just do housework; they were also caregivers who played a decisive role in resource‐oriented care. The concepts of power and domination are very important here.

The historical concept of houseparents helps us understand the current discussion about new forms of residential care homes and psychiatric care.

AbstractIn the 20th century, houseparent families represented a significant resource in the long‐term care of people with mental illnesses and physical disabilities in diaconical care settings in Germany. In theory, such families could therefore be understood as a type of institutional family: groups which occasionally use familial patterns of reciprocity but are not themselves families. As little empirical material on life in institutional families existed, a qualitative study was undertaken to explore the experiences of contemporary witnesses, particularly those who had experienced the duties and responsibilities of housemothers in the second half of the 20th century. This paper has combined the experiences of residents (n= 8) and biological children of houseparents (n= 5) from a qualitative study (n= 42). The qualitative study took a grounded theory approach, with the phenomena of power and domination forming the central category. The findings show that life in houseparent families of the time was shaped by rules which the family members had to obey. This study explores a highly controversial area which is of great relevance for current mental health nursing practice: the power relations in diaconal families. This demonstrates the importance of integrating autonomy and empowerment into everyday communal life and contributes to professional nursing practice.