251 research outputs found
Assembly of root-associated NâO-reducing communities of annual crops is governed by selection for nosZ Glade I over Glade II
The rhizosphere is a hotspot for denitrification. The nitrous oxide (NâO) reductase among denitrifiers and nondenitrifying NâO reducers is the only known NâO sink in the biosphere. We hypothesized that the composition of root-associated NâO-reducing communities when establishing on annual crops depend on soil type and plant species, but that assembly processes are independent of these factors and differ between nosZ clades I and II. Using a pot experiment with barley and sunflower and two soils, we analyzed the abundance, composition, and diversity of soil and root-associated NâO reducing communities by qPCR and amplicon sequencing of nosZ. Clade I was more abundant on roots compared to soil, while clade II showed the opposite. In barley, this pattern coincided with NâO availability, determined as potential NâO production rates, but for sunflower no NâO production was detected in the root compartment. Root and soil nosZ communities differed in composition and phylogeny-based community analyses indicated that assembly of root-associated NâO reducers was driven by the interaction between plant and soil type, with inferred competition being more influential than habitat selection. Selection between clades I and II in the root/soil interface is suggested, which may have functional consequences since most clade I microorganisms can produce NâO
The key components to start and run a business in garden design
Utbildningen TrĂ€dgĂ„rdsingenjör med designinriktning innefattar kurser som företagsekonomi och marknadsföring vilket kan uppmuntra studenter till att starta eget företag. Att bli egenföretagare kanske Ă€r rĂ€tt vĂ€g att gĂ„ men vi frĂ„gar oss om utbildningen ger tillrĂ€ckligt med kompetens för att vĂ„ga ta det steget. Följande kandidatuppsats ger en inblick i hur verkligheten ser ut för företagare inom trĂ€dgĂ„rdsdesign. Syftet Ă€r att undersöka om det finns nĂ„gra specifika komponenter som behövs för att starta och driva ett företag inom trĂ€dgĂ„rdsdesign. Uppsatsen ska vidare försöka konstatera vilka av dessa komponenter som Ă€r viktigast. FrĂ„gestĂ€llningen i denna uppsats lyder: Vilka Ă€r de viktigaste komponenterna för att starta och driva ett företag inom trĂ€dgĂ„rdsdesign? Kandidatuppsatsen innefattar en litteraturstudie dĂ€r befintlig forskning presenteras. HĂ€r beskrivs delar som att vĂ€lja företagsform och vad det innebĂ€r att driva ett tjĂ€nsteföretag. DĂ€refter nĂ€mns viktiga delar i affĂ€rsplanen som bland annat berör marknadsföring, marknad, profilering och prissĂ€ttning. Litteraturstudien avslutas med att förklara vad som gör ett företag inom trĂ€dgĂ„rdsdesign unikt men ocksĂ„ vikten av personliga egenskaper. Denna del följs av kvalitativa intervjuer vars syfte Ă€r att bidra med en verklighetsuppfattning. Fyra stycken företag som Ă€r verksamma inom trĂ€dgĂ„rdsdesign har intervjuats för att sedan jĂ€mföras med litteraturen. Den avslutande diskussionen behandlar hur vĂ€l dessa överensstĂ€mmer. Det visar sig att de intervjuade företagen inte i samma utstrĂ€ckning tillĂ€mpar de delar som litteraturen beskriver och föreslĂ„r. Endast i nĂ„got fall har de intervjuade företagen skrivit ner dokument som kan liknas vid en affĂ€rsplan. De intervjuade företagen har dock pĂ„ olika sĂ€tt berört delar ur en affĂ€rsplan utan att egentligen ha tĂ€nkt pĂ„ det. Trots avsaknaden av en nerskriven affĂ€rsplan sĂ„ har de intervjuade i detta arbete lyckats med sina företag vilket gör att vi kan ifrĂ„gasĂ€tta behovet av en sĂ„dan. Marknadsföring, profilering, marknadsundersökning och prissĂ€ttning stĂ„r sig Ă€ndĂ„ som viktiga komponenter för att lyckas som företagare inom branschen. Ănnu en komponent Ă€r kunskapen om vad det innebĂ€r att sĂ€lja tjĂ€nster och dĂ„ mer specifikt designtjĂ€nster. Slutligen belyses personliga kompetenser som minst lika viktiga komponenter.The swedish bachelor to become a garden designer includes courses such as business administration and marketing, which could encourage students to start their own business. Becoming self-employed might be the way to go but we ask ourselves if the training provides enough skills to dare to take that step. The bachelor thesis provides insight into the realities of entrepreneurs in garden design. The aim in this thesis is to investigate whether there are any specific components needed for starting and running a business in garden design. The essay should also try to establish which of these components are most important. The issue addressed in this paper is: Which are the key components to start and run a business in garden design? The thesis includes a literature review where existing research are presented. Here is described different ways to choose business organization and what it means to run a service business. Then there is mentioned key elements of the business plan, these concerns marketing, analysis of the market, branding and pricing. The literature review concludes by explaining what makes a company in garden design unique but also the importance of a variety of other skills. This part is followed by qualitative interviews whose aim is to contribute a reality. Four companies operating in garden design has been analyzed and then compared with the literature. The final discussion addresses how well they comply. It turns out that the interviewed companies do not equally apply those parts that literature describes and proposes. Only in some cases, the companies interviewed wrote some kind of document which can be likened to a business plan. The companies interviewed, however differently affected parts from a business plan without really thinking about it. Despite the lack of a business plan written down, the companies interviewed in this work succeeded in their business, which means we can question the need for such a thing. Marketing, branding, market research and pricing still stands up as important components for success as an entrepreneur in the industry. Another component is the knowledge of what it means to sell services and then more specifically design services. Finally there is a lot of personal competencies that are equally important
Analyzing the Effects of Neutron Polarizabilities in Elastic Compton Scattering off He
Motivated by the fact that a polarized He nucleus behaves as an
`effective' neutron target, we examine manifestations of neutron
electromagnetic polarizabilities in elastic Compton scattering from the
Helium-3 nucleus. We calculate both unpolarized and double-polarization
observables using chiral perturbation theory to next-to-leading order
() at energies, , where is
the pion mass. Our results show that the unpolarized differential cross section
can be used to measure neutron electric and magnetic polarizabilities, while
two double-polarization observables are sensitive to different linear
combinations of the four neutron spin polarizabilities.
[Note added in 2018] The qualitative conclusions and analytic formulae
presented in this paper are correct, but several of the numerical results are
wrong: see the erratum posted as arXiv:1804.01206 for further details. A full
suite of corrected numerical results for cross sections and asymmetries can be
found in Margaryan et al., arXiv:1804.00956. They can also be obtained as an
interactive Mathematica notebook by emailing [email protected]: 40 pages, 16 figure
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When Reporters get Hands-on with Robo-writing: Professionals Consider Automated Journalismâs Capabilities and Consequences
The availability of data feeds, the demand for news on digital devices, and advances in algorithms are helping to make automated journalism more prevalent. This article extends the literature on the subject by analysing professional journalistsâ experiences with, and opinions about, the technology. Uniquely, the participants were drawn from a range of news organizationsâincluding the BBC, CNN, and Thomson Reutersâand had first-hand experience working with robo-writing software provided by one of the leading technology suppliers. The results reveal journalistsâ judgements on the limitations of automation, including the nature of its sources and the sensitivity of its ânose for newsâ. Nonetheless, journalists believe that automated journalism will become more common, increasing the depth, breadth, specificity, and immediacy of information available. While some news organizations and consumers may benefit, such changes raise ethical and societal issues and, counter-intuitively perhaps, may increase the need for skillsânews judgement, curiosity, and scepticismâthat human journalists embody
Complimentary protein extraction methods increase the identification of the Park Grass Experiment metaproteome
Although the Park Grass Experiment is an important international reference soil for temperate grasslands, it still lacks the direct extraction of its metaproteome. The identification of these proteins can be crucial to our understanding of soil ecology and major biogeochemical processes. However, the extraction of protein from soil is a technically fraught process due to difficulties with co-extraction of humic material and lack of compatible databases to identify proteins. To address these issues, we combined two protein extraction techniques on Park Grass experiment soil, one based on humic acid removal, namely a modified freeze-dry, heat/thaw/phenol/chloroform (HTPC) method and another which co-extracts humic material, namely an established surfactant method. A broad range of proteins were identified by matching the mass spectra of extracted soil proteins against a tailored Park Grass proteome database. These were mainly in the categories of âprotein metabolismâ, âmembrane transportâ, âcarbohydrate metabolismâ, ârespirationâ âribosomal and nitrogen cycleâ proteins, enabling reconstitution of specific processes in grassland soil. Protein annotation using NCBI and EBI databases inferred that the Park Grass soil is dominated by Proteobacteria, Actinobacteria, Acidobacteria and Firmicutes at phylum level and Bradyrhizobium, Rhizobium, Acidobacteria, Streptomyces and Pseudolabrys at genus level. Further functional enrichment analysis enabled us to connect protein identities to regulatory and signalling networks of key biogeochemical cycles, notably the nitrogen cycle. The newly identified Park Grass metaproteome thus provides a baseline on which future targeted studies of important soil processes and their control can be built
Effective theory of the Delta(1232) in Compton scattering off the nucleon
We formulate a new power-counting scheme for a chiral effective field theory
of nucleons, pions, and Deltas. This extends chiral perturbation theory into
the Delta-resonance region. We calculate nucleon Compton scattering up to
next-to-leading order in this theory. The resultant description of existing
p cross section data is very good for photon energies up to about 300
MeV. We also find reasonable numbers for the spin-independent polarizabilities
and .Comment: 29 pp, 9 figs. Minor revisions. To be published in PR
Seven characteristics defining online news formats:Towards a typology of online news and live blogs
Whilst live blogs have become an established part of the news media ecology, corresponding research is still in its infancy, especially that which examines the crucial question of sourcing practices. In this article we address some of the gaps in previous research by conducting a large comparative sourcing analysis of three UK news organisations - BBC News, the Guardian, and the Telegraph - that all regularly publish live blogs. We analyse sourcing practices across three different genres of live blogging and corresponding online news articles, through a comparative analysis of events broadly categorised as crisis, politics, and sport. Our findings suggest that there are some aspects of sourcing practices that are distinct to live blogs, such as directly embedding social media. However, when it comes to polyvocality (the diversity of who gets to speak), genre-specific journalism norms seem to account for more than the affordances of the platform itself and only in sport live blogs are demotic voices habitually included. Based on these findings we develop a typology of live blogging and online news articles, that documents the nuances in sourcing patterns across different news formats and genres, and provide a theoretical basis for future research in this field
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