bluuebunny/crossref_metadata_2025_split huggingface dataset:
Robust and low‐communication geographic routing for wireless ad hoc networks
Authors: Witt Matthias , Turau Volker 
Published: March 2009

AbstractA novel beacon‐less algorithm called Blind Geographic Routing (BGR) is presented, which comes with an effective and robust recovery strategy to circumvent voids, and a new technique to avoid simultaneous forwarding by more than one node, features not included in other beacon‐less algorithms. BGR is the first beacon‐less algorithm that also works in 3D topologies. Additionally, BGR supports different delivery semantics, which specify how close a node must be to the destination location in order to receive the message, and how many nodes shall receive it. These semantics allow for routing not only to designated nodes with network‐wide known locations such as sinks, but to arbitrary destinations within the network area.It is shown through extensive simulation that BGR performs well even in the case of mobility, radio irregularity, and location errors, while GPSR as a beacon‐based algorithm suffers from severe problems in realistic scenarios that do not follow the unit disk graph model, even with recent enhancements of the original GPSR algorithm. Copyright © 2009 John Wiley & Sons, Ltd.
Summary Comments: Multi‐Level Community Based Culturally Situated Interventions
Authors: Trickett Edison J. , Schensul Jean J. 
Published: March 2009

AbstractIn this critical summary the editors summarize main themes that cut across special issue papers including challenges in introducing interventions into communities theorized as dynamic systems, strengths and problems presented by multilevel interventions in single communities, the value of community based culturally situated preventive interventions, and some solutions to evaluation of interventions in complex social settings.
Who wants to live forever? Roe deer survival in a favourable environment
Authors: Cobben Marleen M. P. , Linnell John D. C. , Solberg Erling J. , Andersen Reidar 
Published: March 2009

AbstractThe survival rates and body masses of roe deer (Capreolus capreolus) were studied on the island of Storfosna in central Norway in relation to sex, age, season and year. There were no predators on the island, and hunting was halted during the study period, resulting in a population increase from 10 to 40 individuals per km2 during the period 1991–1994. A total of 352 individual roe deer were radio‐monitored on a monthly basis. Survival rates were analyzed using the MARK software. An age effect in survival was found separating fawns from yearlings and adults, and for yearlings and adults we furthermore found a year effect. There was evidence for density dependence in body masses of fawns and yearlings, but no density effect in survival rates. We found no sex effect in winter body mass, but a significant sex effect in survival rates. We conclude that (1) increased population density can have an effect on body masses without causing a change in survival rates (2) roe deer can maintain very high survival rates under favourable environmental conditions even at very high population densities (3) male adults can reach equally high survival rates as females under favourable circumstances.
Comparative efficacy and safety of oxcarbazepine versus divalproex sodium in the treatment of acute mania: A pilot study
Authors: Kakkar Ashish Kumar , Rehan H.S. , Unni K.E.S. , Gupta Neeraj Kumar , Chopra Deepti , Kataria Dinesh 
Published: March 2009

AbstractObjectiveThis study compared the efficacy and safety of oxcarbazepine and divalproex sodium in acute mania patients.Subjects and methodsIn this 12 week, randomized, double-blind pilot study, 60 patients diagnosed with acute mania (DSM-IV) and a baseline Young Mania Rating Scale (YMRS) score of 20 or more received flexibly dosed oxcarbazepine (1000–2400 mg/day) or divalproex (750–2000 mg/day). The mean decrease in the YMRS score from baseline was used as the main outcome measure of response to treatment. A priori protocol-defined threshold scores were ≤12 for remission and ≥15 for relapse. Number of patients showing adequate response and the time taken to achieve improvement was compared. Adverse events were systematically recorded throughout the study.ResultsOver 12 weeks, mean improvement in YMRS scores was comparable for both the groups including the mean total scores as well as percentage fall from baseline. There were no significant differences between treatments in the rates of symptomatic mania remission (90% in divalproex and 80% in oxcarbazepine group) and subsequent relapse. Median time taken to symptomatic remission was 56 days in divalproex group while it was 70 days in the oxcarbazepine group (p = 0.123). A significantly greater number of patients in divalproex group experienced one or more adverse drug events as compared to patients in the oxcarbazepine group (66.7% versus 30%, p < 0.01).ConclusionOxcarbazepine demonstrated comparable efficacy to divalproex sodium in the management of acute mania. Also the overall adverse event profile was found to be superior for oxcarbazepine.
Cannabis use and age of diagnosis of schizophrenia
Authors: Sugranyes Gisela , Flamarique Itziar , Parellada Eduard , Baeza Immaculada , Goti Javier , Fernandez-Egea Emilio , Bernardo Miquel 
Published: March 2009

AbstractBackground and objectivesObservational studies have reported earlier onset of psychosis in schizophrenic patients with a history of cannabis use. Earlier age of onset of schizophrenia has been associated with a poorer outcome. We aimed to examine whether cannabis use determined an earlier onset of schizophrenia in a sample of first episode patients, in an area with one of Europe's highest rates of cannabis use.Methods116 subjects with first episode psychosis and subsequent diagnosis of schizophrenia (after a 12-month follow-up) were included Age at first antipsychotic treatment (A1T) was used as proxy for age of psychosis onset, and acted as dependent variable for the statistical analysis. Cannabis use was evaluated retrospectively, and divided into three groups according to peak frequency (never, sporadic/frequent, daily).Results46 (39.7%) subjects had never used cannabis, 23 (19.9%) had done so sporadically/frequently, and 47 (40.5%) daily. A1T differed between the three groups (mean, in years and [SD]: 27.0 [4.94]; 25.7 [4.44] and 24.5 [4.36]; p = 0.033) and diminished as cannabis use increased (linear tendency; p = 0.009). Post-hoc analysis showed that cannabis use (irrespective of frequency) was significantly associated with decrease in A1T (p = 0.033), as shown by the first contrast [1 −1/2 −1/2]. Post-hoc contrast showed that cannabis users had a significantly lower age of onset of psychosis (mean decrease, in years: 1.93; CI (confidence interval) 95%: 0.17–3.70; p = 0.033).ConclusionsCannabis use was significantly associated with a decrease in age of onset of schizophrenia. Age of onset of the disease correlated with frequency of cannabis use.
Increasing self-esteem: Efficacy of a group intervention for individuals with severe mental disorders
Authors: Borras L. , Boucherie M. , Mohr S. , Lecomte T. , Perroud N. , Huguelet Ph. 
Published: March 2009

AbstractBackgroundIndividuals with psychosis are known to have a lower self-esteem compared to the general population, in part because of social stigma, paternalistic care, long periods of institutionalization and negative family interactions. This study aimed at assessing the efficacy of a self-esteem enhancement program for individuals with severe mental illness and at analyzing the results in their European context.MethodA randomized cross-over study including 54 outpatients with a diagnosis of schizophrenia from Geneva, Switzerland, was conducted. Twenty-four were recruited from an outpatient facility receiving traditional psychiatric care whereas 30 came from an outpatient facility with case-management care. Psychosocial, diagnostic and symptom measures were taken for all the subjects before treatment, after treatment, and at 3-months' follow-up.ResultsResults indicated significant positive self-esteem module effects on self-esteem, self-assertion, active coping strategies and symptom for the participants receiving case-management care. Results were not significant for those receiving traditional care. However, 71% of all participants expressed satisfaction with the module.ConclusionIndividuals with schizophrenia appear to be benefit from the effects of the self-esteem module, particularly when they are involved in a rehabilitation program and followed by a case manager who liaises with the other partners of the multidisciplinary team. This encourages reconsidering the interventions' format and setting in order to ensure lasting effects on the environment and in turn on coping, self-esteem and overall empowerment.
Exploring the complexities of value creation: The role of engagement strength
Authors: Scholer Abigail A. , Higgins E. Tory 
Published: March 2009

AbstractRegulatory engagement theory (Higgins, E. T. (2006). Value from hedonic experience and engagement. Psychological Review, 113, 439–460; Higgins, E.T. & Scholer, A.A. (2009). Engaging the consumer: The science and art of the value creation process. Journal of Consumer Psychology) proposes that engagement strength plays a critical role in the creation of value intensity. We discuss the ways in which engagement, in this model, can be distinguished from arousal, motivation to act, and experienced difficulty. We distinguish between the mechanisms and predictions made by regulatory engagement theory versus cognitive dissonance theory and a goal systems approach. We also describe the complexities and conditions under which some sources of engagement strength (e.g., regulatory fit) may relate to value creation. For instance, while regulatory fit has more typically been associated with increased engagement strength, regulatory nonfit may also sometimes increase engagement by serving as an obstacle to be overcome. We review existing evidence and highlight open questions related to the role of engagement strength in creating value.
New carbon isotope stratigraphy of the Ediacaran–Cambrian boundary interval from SW China: implications for global correlation
Authors: LI DA , LING HONG-FEI , JIANG SHAO-YONG , PAN JIA-YONG , CHEN YONG-QUAN , CAI YUAN-FENG , FENG HONG-ZHEN 
Published: March 2009

AbstractThe Yangtze Platform preserves relatively thick carbonate successions and excellent fossil records across the Ediacaran–Cambrian boundary interval. The intensely studied Meishucun section in East Yunnan was one of the Global Stratotype Section candidates for the Precambrian–Cambrian boundary. However, depositional breaks were suspected in the section and the first appearance of small shelly fossils could not be verified. The Laolin section located in NE Yunnan is more continuous and shows great potential for global correlation of carbon isotope features across the Precambrian–Cambrian boundary. However, the stratigraphic framework and correlations were controversial. We studied and systematically sampled the Laolin section and present here new carbon isotope data for this section. The Laolin section consists of, in ascending order, the Baiyanshao dolostone of the Dengying Formation, the Daibu siliceous dolostone, Zhongyicun dolomitic phosphorite, lower Dahai dolostone and upper Dahai limestone of the Zhujiaqing Formation, and the black siltstone of the Shiyantou Formation. Our data reveal a large negative δ13C excursion (−7.2‰, L1′) in the Daibu Member, which matches the previously published data for the Laolin section, and a large positive excursion (+3.5‰, L4) in the Dahai Member, which was not shown in the published data. The excursion L1′ correlates well with the similarly large negative excursion near the first appearance of small shelly fossils in Siberia and Mongolia. Similar magnitude excursions are also known from Morocco and Oman, for which there are no robust fossil constraints but from where volcanic ash beds have been dated precisely at 542 Ma, thus confirming a global biogeochemical event near the Ediacaran–Cambrian boundary. Our data also indicate that deposition was more continuous at the Laolin section compared with the Meishucun section, where there are no records of a comparable negative excursion near the Ediacaran–Cambrian boundary, nor any comparable positive excursion in the Dahai Member. Therefore, the Laolin section has proven potential to be a supplementary Global Stratotype Section for the Ediacaran–Cambrian boundary on the Yangtze Platform.
Digenean trematode species in the cockle Cerastoderma edule: identification key and distribution along the north-eastern Atlantic shoreline
Authors: de Montaudouin Xavier , Thieltges David W. , Gam Mériame , Krakau Manuela , Pina Suzana , Bazairi Hocein , Dabouineau Laurent , Russell-Pinto Fernanda , Jensen K. Thomas 
Published: March 2009

We describe the digenean fauna of one of the dominant intertidal hosts, the common cockle Cerastoderma edule, in terms of biomass, off north-eastern Atlantic shores. Using published and unpublished literature we have prepared an identification key and provide an up-date of the large-scale distributional patterns of digenean species of the common cockle. At least sixteen digenean species, belonging to seven families, use cockles as intermediate host. Among these species two utilize cockles as first intermediate host only, whereas two species utilize cockles as both first and second intermediate host. The remaining eleven species have cockles as their second intermediate host. Water birds and fish are the definitive hosts to twelve and four species, respectively.Cockles are infected with digeneans along the latitudinal gradient from southern Morocco to the western region of the Barents Sea often with high infection levels. Whereas some of these digenean species occur along most of the latitudinal gradient others show a more restricted northern or southern distribution mostly caused by an underlying latitudinal gradient of host species.Knowledge of digenean species and their large-scale distribution pattern may serve as a baseline for future studies dealing with the effects of climate change on parasite–host systems. For such studies the cockle and its digenean community could be an ideal model system.
C1-generic symplectic diffeomorphisms: partial hyperbolicity and zero centre Lyapunov exponents
Authors: Bochi Jairo 
Published: March 2009

AbstractWe prove that if f is a C1-generic symplectic diffeomorphism then the Oseledets splitting along almost every orbit is either trivial or partially hyperbolic. In addition, if f is not Anosov then all the exponents in the centre bundle vanish. This establishes in full a result announced by Mañé at the International Congress of Mathematicians in 1983. The main technical novelty is a probabilistic method for the construction of perturbations, using random walks.
Local models in the ramified case. III Unitary groups
Authors: Pappas G. , Rapoport M. 
Published: March 2009

AbstractWe continue our study of the reduction of PEL Shimura varieties with parahoric level structure at primespat which the group defining the Shimura variety ramifies. We describe ‘good’p-adic integral models of these Shimura varieties and study their étale local structure. In the present paper we mainly concentrate on the case of unitary groups for a ramified quadratic extension. Some of our results are applications of the theory of twisted affine flag varieties that we developed in a previous paper.
Unique archaeal assemblages in the Arctic Ocean unveiled by massively parallel tag sequencing
Authors: Galand Pierre E , Casamayor Emilio O , Kirchman David L , Potvin Marianne , Lovejoy Connie 
Published: March 2009

Abstract
The Arctic Ocean plays a critical role in controlling nutrient budgets between the Pacific and Atlantic Ocean. Archaea are key players in the nitrogen cycle and in cycling nutrients, but their community composition has been little studied in the Arctic Ocean. Here, we characterize archaeal assemblages from surface and deep Arctic water masses using massively parallel tag sequencing of the V6 region of the 16S rRNA gene. This approach gave a very high coverage of the natural communities, allowing a precise description of archaeal assemblages. This first taxonomic description of archaeal communities by tag sequencing reported so far shows that it is possible to assign an identity below phylum level to most (95%) of the archaeal V6 tags, and shows that tag sequencing is a powerful tool for resolving the diversity and distribution of specific microbes in the environment. Marine group I Crenarchaeota was overall the most abundant group in the Arctic Ocean and comprised between 27% and 63% of all tags. Group III Euryarchaeota were more abundant in deep-water masses and represented the largest archaeal group in the deep Atlantic layer of the central Arctic Ocean. Coastal surface waters, in turn, harbored more group II Euryarchaeota. Moreover, group II sequences that dominated surface waters were different from the group II sequences detected in deep waters, suggesting functional differences in closely related groups. Our results unveiled for the first time an archaeal community dominated by group III Euryarchaeota and show biogeographical traits for marine Arctic Archaea.
Extracellular polysaccharide-protein complexes of a harmful alga mediate the allelopathic control it exerts within the phytoplankton community
Authors: Yamasaki Yasuhiro , Shikata Tomoyuki , Nukata Atsushi , Ichiki Satoko , Nagasoe Sou , Matsubara Tadashi , Shimasaki Yohei , Nakao Miki , Yamaguchi Kenichi , Oshima Yuji , Oda Tatsuya , Ito Makoto , Jenkinson Ian R , Asakawa Makio , Honjo Tsuneo 
Published: March 2009

Abstract
The goal of this study was to examine the significance of allelopathy by the raphidophyte Heterosigma akashiwo in a multispecies phytoplankton community in the field. Towards this aim, we sought allelochemicals of H. akashiwo, which had allelopathic effect both in laboratory experiments and in the field. As an initial step, we showed that the allelopathic effects of H. akashiwo filtrate were both species-specific and dependent upon the cell density of the target species. Secondly, we found for the first time that extracellular, high-molecular weight allelochemicals [that is, polysaccharide-protein complexes (APPCs)] were produced by a marine phytoplankton species, H. akashiwo. Thirdly, we indicated that the purified APPCs selectively inhibited the growth of the diatom Skeletonema costatum that is a major competitor of H. akashiwo, and thereby tended to promote the formation of monospecific H. akashiwo blooms. Furthermore, we demonstrated that the inhibitory effect of APPCs on the growth of the diatoms was determined by binding to the cell surface of the target species. Finally, we succeeded in the detection of APPCs in the field samples at concentrations exceeding their experimentally determined action threshold during the H. akashiwo bloom. Strategies for ecosystem control, including mitigation of harmful algal blooms (HABs), should take into account that red-tide organisms like H. akashiwo are already part of complex webs involving inter-specific allelopathic inhibition and ecosystem control during their dense blooms.
Spatiotemporal Profiling of Starch Biosynthesis and Degradation in the Developing Barley Grain
Authors: Radchuk Volodymyr V. , Borisjuk Ludmilla , Sreenivasulu Nese , Merx Kathleen , Mock Hans-Peter , Rolletschek Hardy , Wobus Ulrich , Weschke Winfriede 
Published: March 2009

AbstractBarley (Hordeum vulgare) grains synthesize starch as the main storage compound. However, some starch is degraded already during caryopsis development. We studied temporal and spatial expression patterns of genes coding for enzymes of starch synthesis and degradation. These profiles coupled with measurements of selected enzyme activities and metabolites have allowed us to propose a role for starch degradation in maternal and filial tissues of developing grains. Early maternal pericarp functions as a major short-term starch storage tissue, possibly ensuring sink strength of the young caryopsis. Gene expression patterns and enzyme activities suggest two different pathways for starch degradation in maternal tissues. One pathway possibly occurs via α-amylases 1 and 4 and β-amylase 1 in pericarp, nucellus, and nucellar projection, tissues that undergo programmed cell death. Another pathway is deducted for living pericarp and chlorenchyma cells, where transient starch breakdown correlates with expression of chloroplast-localized β-amylases 5, 6, and 7, glucan, water dikinase 1, phosphoglucan, water dikinase, isoamylase 3, and disproportionating enzyme. The suite of genes involved in starch synthesis in filial starchy endosperm is much more complex than in pericarp and involves several endosperm-specific genes. Transient starch turnover occurs in transfer cells, ensuring the maintenance of sink strength in filial tissues and the reallocation of sugars into more proximal regions of the starchy endosperm. Starch is temporally accumulated also in aleurone cells, where it is degraded during the seed filling period, to be replaced by storage proteins and lipids.
Roles of Morphology, Anatomy, and Aquaporins in Determining Contrasting Hydraulic Behavior of Roots
Authors: Bramley Helen , Turner Neil C. , Turner David W. , Tyerman Stephen D. 
Published: March 2009

Abstract
The contrasting hydraulic properties of wheat (Triticum aestivum), narrow-leafed lupin (Lupinus angustifolius), and yellow lupin (Lupinus luteus) roots were identified by integrating measurements of water flow across different structural levels of organization with anatomy and modeling. Anatomy played a major role in root hydraulics, influencing axial conductance (L ax) and the distribution of water uptake along the root, with a more localized role for aquaporins (AQPs). Lupin roots had greater L ax than wheat roots, due to greater xylem development. L ax and root hydraulic conductance (L r) were related to each other, such that both variables increased with distance from the root tip in lupin roots. L ax and L r were constant with distance from the tip in wheat roots. Despite these contrasting behaviors, the hydraulic conductivity of root cells (Lp c) was similar for all species and increased from the root surface toward the endodermis. Lp c was largely controlled by AQPs, as demonstrated by dramatic reductions in Lp c by the AQP blocker mercury. Modeling the root as a series of concentric, cylindrical membranes, and the inhibition of AQP activity at the root level, indicated that water flow in lupin roots occurred primarily through the apoplast, without crossing membranes and without the involvement of AQPs. In contrast, water flow across wheat roots crossed mercury-sensitive AQPs in the endodermis, which significantly influenced L r. This study demonstrates the importance of examining root morphology and anatomy in assessing the role of AQPs in root hydraulics.