236 research outputs found

    Analysis of the Diversity of Megachilidae Bees on the Northern Subplateau of the Iberian Peninsula

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    In the western Mediterranean, 772 species of bees in the family Megachilidae have been reported. Special emphasis has been placed on the Iberian Peninsula, where to date 218 species are known. However, few intensive studies providing information about communities of Megachilidae have been carried out. Two earlier works cite 70 species; almost one third of those known on the Peninsula. With an aim of gaining insight into the structure of the communities of Megachilidae and the factors influencing them, an analysis was made of the alpha and beta diversity of different localities in the northern subplateau. Malaise traps (black and white) were used, and 559 specimens belonging to 55 species were identified of which most exhibited a nest-holder-type nesting habit. Abundance and richness were higher for white traps, although a considerable degree of complementarity was observed with the black traps. In the study zone, diversity can be considered medium-high with a phylogenetic diversity corresponding to stable populations. Regarding the composition of the Megachilidae communities, the influence of the landscape structure, of the microhabitat, and of the colour of the trap used to collect the specimens was detected. The following are recommended: (1) the use of both black and white traps, since they show high complementarity and offer different information about community structure, (2) homogenization of the samples in comparisons among communities, owing to the influence of the color of the trap, which masks the importance of ecological factors in community structuring, and (3) the collection of samples from at least two years previous, in view of the elevated “replacement” of species observed with species richness estimators

    Capability driven development: an approach to designing digital enterprises

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    The final publication is available at Springer via http://dx.doi.org/10.1007/s12599-014-0362-0[EN] The need for organizations to operate in changing environments is addressed by proposing an approach that integrates organizational development with information system (IS) development taking into account changes in the application context of the solution. This is referred to as Capability Driven Development (CDD). A meta-model representing business and IS designs consisting of goals, key performance indicators, capabilities, context and capability delivery patterns, is being proposed. The use of the meta-model is validated in three industrial case studies as part of an ongoing collaboration project, whereas one case is presented in the paper. Issues related to the use of the CDD approach, namely, CDD methodology and tool support are also discussed.This work has been partially supported by the EU-FP7 funded project no: 611351 CaaS - Capability as a Service in Digital Enterprises.Berzisa, S.; Bravos, G.; Cardona Gonzalez, T.; Czubayko, U.; España, S.; Grabis, J.; Henkel, M.... (2015). Capability driven development: an approach to designing digital enterprises. Business and Information Systems Engineering. 57(1):15-25. https://doi.org/10.1007/s12599-014-0362-0S1525571ArchiMate (2013) An enterprise modeling language from the Open Group. http://www.opengroup.org/archimate/ . Accessed 3 Dec 2014Asadi M, Ramsin R (2008) MDA-based methodologies: an analytical survey. In: Proceedings Model driven architecture – foundations and applications (ECMDA-FA 2008), LNCS 5095, pp 419–431Barney JB (1991) Firm resources and sustained competitive advantage. J Manag 17(1):99–120Bērziša S, Bravos G, Gonzalez Cardona T, Czubayko U, España S, Grabis J, Henke lM, Jokste L, Kampars J, Koc H, Kuhr J, Llorca C, Loucopoulos P, Juanes Pascua lR, Sandkuh lK, Simic H, Stirna J, Zdravkovic J (2014) Deliverable 1.4: Requirements specification for CDD, CaaS – capability as a service for digital enterprises. FP7 project no 611351, Riga Technical University, Latvia. Submitted for reviewBubenko JA Jr, Persson A, Stirna J (2001) User guide of the knowledge management approach using enterprise knowledge patterns. Deliverable D3, IST programme project hypermedia and pattern based knowledge management for smart organisations. project no. IST-2000-28401, Royal Institute of Technology, SwedenBriand LC, Yue T, Labiche Y (2011) A systematic review of transformation approaches between user requirements and analysis models. Requir Eng 16:75–99De Kinderen S, Gordijn J, Akkermans H (2009) Reasoning about customer needs in multi-supplier ICT service bundles using decision models. In: Proceedings 11th international conference on enterprise information systems (ICEIS 2009), pp 131–136Deloitte (2009) Cloud computing: forecasting change. Deloitte Consulting, New York. http://public.deloitte.no/dokumenter/2_Cloud_Computing%5B1%5D.pdf . Accessed 3 Dec 2014Dey A (2001) Understanding and using context. Pers Ubiquitous Comput 5(1):4–7Gamma E, Helm R, Johnson R, Vlissides J (1995) Design patterns: elements of reusable object-oriented software architecture. Addison-Wesley, BostonGomes D, Gonçalves JM, Santos R, Aguiar R (2010) XMPP based context management architecture. In: Proceedings GLOBECOM workshop, IEEE, pp 1372–1377González A, España S, Ruiz M, Pastor Ó (2011) Systematic derivation of class diagrams from communication-oriented business process models. In: 12th working conference on business process modeling, development, and support (BPMDS’11). Springer LNBIP 81, pp 246–260Henkel M, Stirna J (2010) Pondering on the key functionality of model driven development tools: the case of mendix. In: Forbrig P, Günther H (eds) Proceedings business informatics research (BIR 2010), Springer LNBIP 64, pp 146–160Hervas R, Bravo J, Fontecha J (2010) A context model based on ontological languages – a proposal for information visualisation. J Univers Comput Sci 16(12):1539–1555Jarke M, Loucopoulos P, Lyytinen K, Mylopoulos J, Robinson W (2011) The brave new world of design requirements. Information Syst 36(7):992–1008Kaplan RS, Norton DP (2004) Strategy maps: converting intangible assets into tangible outcomes. Harvard Business School Press, BostonKleppe A, Warmer J, Bast W (2013) MDA explained. Addison-Wesley, BostonLoniewski G, Insfran E, Abrahao L (2010) A systematic review of the use of requirements engineering techniques in model-driven development. In: Proceedings model driven engineering languages and systems (MODELS 2010), Part II, LNCS 6395, pp 213–227Mohagheghi P, Dehlen V (2008) Where is the proof? - a review of experiences from applying MDE in industry. In: Proceedings model driven architecture – foundations and applications (ECMDA-FA 2008). LNCS 5095. Springer, Heidelberg, pp 432–443Nilsson AG, Tolis C, Nellborn C (eds) (1999) Perspectives on business modelling: understanding and changing organisations. Springer, HeidelbergOASIS (2011) Reference architecture foundation for service oriented architecture version 1.0, committee specification draft 03/public review draft 02 06 July 2011. http://docs.oasis-open.org/soa-rm/soa-ra/v1.0/soa-ra.pdf . Accessed 3 Dec 2014OMG (2011a) UML superstructure. http://www.omg.org/spec/UML/2.4.1/ . Accessed 3 Dec 2014OMG (2011b) Business process model and notation. http://www.omg.org/spec/BPMN/2.0/ . Accessed 3 Dec 2014Osterwalder A, Pigneur Y (2003) Modeling value propositions in e-business. Proc 5th international conference on electronic commerce (ICEC 2003). ACM Conference Proceedings Series 50Papazoglou MP, Yang J (2002) Design methodology for web services and business processes. In: Proceedings 3rd international workshop on technologies for e-services (TES 03). LNCS 2444. Springer, Heidelberg, pp 54–64Pastor O, Giachetti G (2010) Linking goal-oriented requirements and model-driven development. In: Intentional perspectives on information systems engineering. Springer, Heidelberg, pp 257–276Porter ME (1985) Competitive advantage: creating and sustaining superior performance. Free Press, New YorkRuiz M, Costal D, España S, Franch X, Pastor Ó (2014) Integrating the goal and business process perspectives in information system analysis. In: 26th International Conference on Advanced Information Systems Engineering (CAiSE 2014). LNCS 8484. Springer, Heidelberg, pp 332–346Sheng Q, Yu J, Dustar S (eds) (2010) Enabling context-aware web services: methods, architectures, and technologies. Chapman & Hall/CRC, Boca RatonSmanchat S, Ling S, Indrawan M (2008) A survey on context-aware workflow adaptations. In: Proceedings 6th international conference on advances in mobile computing and multimedia (MoMM 2008), New York, pp 414–417Stirna J, Grabis J, Henkel M, Zdravkovic J (2012) Capability driven development – an approach to support evolving organizations. In: The practice of enterprise modeling (PoEM 2012). LNBIP 134. Springer, Heidelberg, pp 117–131Vale S, Hammoudi S (2009) COMODE: a framework for the development of context-aware applications in the context of MDE. In: Proceedings 4th international conference on internet and web applications and services (ICIW 2009). IEEE, Venice, pp 261–266Wesenberg H (2011) Enterprise modeling in an agile world. In: Johannesson P, Krogstie J, Opdahl AL (eds) The practice of enterprise modeling (PoEM 2011). LNBIP 92. Springer, Heidelberg, pp 126–130Zdravkovic J, Stirna J, Henkel M, Grabis J (2013) Modeling business capabilities and context dependent delivery by cloud services. In: Proceedings advanced information systems engineering (CAiSE 2013). LNCS 7908. Springer, Heidelberg, pp 369–38

    Tracing animal genomic evolution with the chromosomal-level assembly of the freshwater sponge Ephydatia muelleri

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    Abstract The genomes of non-bilaterian metazoans are key to understanding the molecular basis of early animal evolution. However, a full comprehension of how animal-specific traits such as nervous systems arose is hindered by the scarcity and fragmented nature of genomes from key taxa, such as Porifera. Ephydatia muelleri is a freshwater sponge found across the northern hemisphere. Here we present its 326 Mb genome, assembled to high contiguity (N50: 9.88 Mb) with 23 chromosomes on 24 scaffolds. Our analyses reveal a metazoan-typical genome architecture, with highly shared synteny across Metazoa, and suggest that adaptation to the extreme temperatures and conditions found in freshwater often involves gene duplication. The pancontinental distribution and ready laboratory culture of E. muelleri make this a highly practical model system, which with RNAseq, DNA methylation and bacterial amplicon data spanning its development and range allows exploration of genomic changes both within sponges and in early animal evolution

    Anti-inflammatory and anti-invasive effects of α-melanocyte-stimulating hormone in human melanoma cells

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    Alpha-melanocyte stimulating hormone (alpha-MSH) is known to have pleiotrophic functions including pigmentary, anti-inflammatory, antipyretic and immunoregulatory roles in the mammalian body. It is also reported to influence melanoma invasion with levels of alpha-, beta- and gamma-MSH correlated clinically with malignant melanoma development, but other studies suggest alpha-MSH acts to retard invasion. In the present study, we investigated the action of alpha-MSH on three human melanoma cell lines (HBL, A375-SM and C8161) differing in metastatic potential. alpha-melanocyte-simulating hormone reduced invasion through fibronectin and also through a human reconstructed skin composite model for the HBL line, and inhibited proinflammatory cytokine-stimulated activation of the NF-kappaB transcription factor. However, A375-SM and C8161 cells did not respond to alpha-MSH. Immunofluorescent microscopy and Western blotting identified melanocortin-1 receptor (MC-1R) expression for all three lines and MC-2R on HBL and A375-SM lines. Receptor binding identified a similar affinity for alpha-MSH for all three lines with the highest number of binding sites on HBL cells. Only the HBL melanoma line demonstrated a detectable cyclic adenosine monophosphate (cAMP) response to alpha-MSH, although all three lines responded to acute alpha-MSH addition (+(-)-N(6)-(2-phenylisopropyl)-adenosine (PIA)) with an elevation in intracellular calcium. The nonresponsive lines displayed MC-1R polymorphisms (C8161, Arg (wt) 151/Cys 151; A375-SM, homozygous Cys 151), whereas the HBL line was wild type. Stable transfection of the C8161 line with wild-type MC-1R produced cells whose invasion was significantly inhibited by alpha-MSH. From this data, we conclude that alpha-MSH can reduce melanoma cell invasion and protect cells against proinflammatory cytokine attack in cells with the wild-type receptor (HBL).Journal ArticleResearch Support, Non-U.S. Gov'tSCOPUS: ar.jinfo:eu-repo/semantics/publishe

    Methods of nutrition surveillance in low-income countries

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    Background In 1974 a joint FAO/UNICEF/WHO Expert Committee met to develop methods for nutrition surveillance. There has been much interest and activity in this topic since then, however there is a lack of guidance for practitioners and confusion exists around the terminology of nutrition surveillance. In this paper we propose a classification of data collection activities, consider the technical issues for each category, and examine the potential applications and challenges related to information and communication technology. Analysis There are three major approaches used to collect primary data for nutrition surveillance: repeated cross-sectional surveys; community-based sentinel monitoring; and the collection of data in schools. There are three major sources of secondary data for surveillance: from feeding centres, health facilities, and community-based data collection, including mass screening for malnutrition in children. Surveillance systems involving repeated surveys are suitable for monitoring and comparing national trends and for planning and policy development. To plan at a local level, surveys at district level or in programme implementation areas are ideal, but given the usually high cost of primary data collection, data obtained from health systems are more appropriate provided they are interpreted with caution and with contextual information. For early warning, data from health systems and sentinel site assessments may be valuable, if consistent in their methods of collection and any systematic bias is deemed to be steady. For evaluation purposes, surveillance systems can only give plausible evidence of whether a programme is effective. However the implementation of programmes can be monitored as long as data are collected on process indicators such as access to, and use of, services. Surveillance systems also have an important role to provide information that can be used for advocacy and for promoting accountability for actions or lack of actions, including service delivery. Conclusion This paper identifies issues that affect the collection of nutrition surveillance data, and proposes definitions of terms to differentiate between diverse sources of data of variable accuracy and validity. Increased interest in nutrition globally has resulted in high level commitments to reduce and prevent undernutrition. This review helps to address the need for accurate and regular data to convert these commitments into practice

    Soil pH mediates the balance between stochastic and deterministic assembly of bacteria

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    Little is known about the factors affecting the relative influences of stochastic and deterministic processes that govern the assembly of microbial communities in successional soils. Here, we conducted a meta-analysis of bacterial communities using six different successional soil datasets distributed across different regions. Different relationships between pH and successional age across these datasets allowed us to separate the influences of successional age (i.e., time) from soil pH. We found that extreme acidic or alkaline pH conditions lead to assembly of phylogenetically more clustered bacterial communities through deterministic processes, whereas pH conditions close to neutral lead to phylogenetically less clustered bacterial communities with more stochasticity. We suggest that the influence of pH, rather than successional age, is the main driving force in producing trends in phylogenetic assembly of bacteria, and that pH also influences the relative balance of stochastic and deterministic processes along successional soils. Given that pH had a much stronger association with community assembly than did successional age, we evaluated whether the inferred influence of pH was maintained when studying globally distributed samples collected without regard for successional age. This dataset confirmed the strong influence of pH, suggesting that the influence of soil pH on community assembly processes occurs globally. Extreme pH conditions likely exert more stringent limits on survival and fitness, imposing strong selective pressures through ecological and evolutionary time. Taken together, these findings suggest that the degree to which stochastic vs. deterministic processes shape soil bacterial community assembly is a consequence of soil pH rather than successional age

    Passive smoking in babies: The BIBE study (Brief Intervention in babies. Effectiveness)

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    Background: There is evidence that exposure to passive smoking in general, and in babies in particular, is an important cause of morbimortality. Passive smoking is related to an increased risk of pediatric diseases such as sudden death syndrome, acute respiratory diseases, worsening of asthma, acute-chronic middle ear disease and slowing of lung growth. The objective of this article is to describe the BIBE study protocol. The BIBE study aims to determine the effectiveness of a brief intervention within the context of Primary Care, directed to mothers and fathers that smoke, in order to reduce the exposure of babies to passive smoking (ETS). Methods/Design: Cluster randomized field trial (control and intervention group), multicentric and open. Subject: Fathers and/or mothers who are smokers and their babies (under 18 months) that attend pediatric services in Primary Care in Catalonia. The measurements will be taken at three points in time, in each of the fathers and/or mothers who respond to a questionnaire regarding their baby's clinical background and characteristics of the baby's exposure, together with variables related to the parents' tobacco consumption. A hair sample of the baby will be taken at the beginning of the study and at six months after the initial visit (biological determination of nicotine). The intervention group will apply a brief intervention in passive smoking after specific training and the control group will apply the habitual care. Discussion: Exposure to ETS is an avoidable factor related to infant morbimortality. Interventions to reduce exposure to ETS in babies are potentially beneficial for their health. The BIBE study evaluates an intervention to reduce exposure to ETS that takes advantage of pediatric visits. Interventions in the form of advice, conducted by pediatric professionals, are an excellent opportunity for prevention and protection of infants against the harmful effects of ETS

    Does Reduced IGF-1R Signaling in Igf1r+/− Mice Alter Aging?

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    Mutations in insulin/IGF-1 signaling pathway have been shown to lead to increased longevity in various invertebrate models. Therefore, the effect of the haplo- insufficiency of the IGF-1 receptor (Igf1r+/−) on longevity/aging was evaluated in C57Bl/6 mice using rigorous criteria where lifespan and end-of-life pathology were measured under optimal husbandry conditions using large sample sizes. Igf1r+/− mice exhibited reductions in IGF-1 receptor levels and the activation of Akt by IGF-1, with no compensatory increases in serum IGF-1 or tissue IGF-1 mRNA levels, indicating that the Igf1r+/− mice show reduced IGF-1 signaling. Aged male, but not female Igf1r+/− mice were glucose intolerant, and both genders developed insulin resistance as they aged. Female, but not male Igf1r+/− mice survived longer than wild type mice after lethal paraquat and diquat exposure, and female Igf1r+/− mice also exhibited less diquat-induced liver damage. However, no significant difference between the lifespans of the male Igf1r+/− and wild type mice was observed; and the mean lifespan of the Igf1r+/− females was increased only slightly (less than 5%) compared to wild type mice. A comprehensive pathological analysis showed no significant difference in end-of-life pathological lesions between the Igf1r+/− and wild type mice. These data show that the Igf1r+/− mouse is not a model of increased longevity and delayed aging as predicted by invertebrate models with mutations in the insulin/IGF-1 signaling pathway

    Species Interactions during Diversification and Community Assembly in an Island Radiation of Shrews

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    Closely related, ecologically similar species often have adjacent distributions, suggesting competitive exclusion may contribute to the structure of some natural communities. In systems such as island archipelagos, where speciation is often tightly associated with dispersal over oceanic barriers, competitive exclusion may prevent population establishment following inter-island dispersal and subsequent cladogenesis.) species in the Philippines are the result of competitive exclusion preventing secondary invasion of occupied islands. We first compare ecological niche models between two widespread, allopatric species and find statistical support for their ecological similarity, implying that competition for habitat between these species is possible. We then examine dispersion patterns among sympatric species and find some signal for overdispersion of body size, but not for phylogenetic branch length. Finally, we simulate the process of inter-island colonization under a stochastic model of dispersal lacking ecological forces. Results are dependent on the geographic scope and colonization probability employed. However, some combinations suggest that the number of inter-island dispersal events necessary to populate the archipelago may be much higher than the minimum number of colonization events necessary to explain current estimates of species richness and phylogenetic relationships. If our model is appropriate, these results imply that alternative factors, such as competitive exclusion, may have influenced the process of inter-island colonization and subsequent cladogenesis.We interpret the combined results as providing tenuous evidence that similarity in body size may prevent co-occurrence in Philippine shrews and that competitive exclusion among ecologically similar species, rather than an inability to disperse among islands, may have limited diversification in this group, and, possibly other clades endemic to island archipelagos
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