26,719 research outputs found
Herbaceous biomass species diversity relationships in nutrient hotspots of a semi-arid African riparian ecosystem
No full textThe hump-back relationship between species diversity and productivity predicts highest species richness at
intermediate levels of biomass, and low species numbers in least and most productive habitats. Sodic patches of
semi-arid savannas are considered ‘nutrient hotspots’ by producing high-quality forage. The impact of biomass
reduction (due to overgrazing) and accumulation (in the absence of herbivores) on herbaceous species richness
and diversity is still unknown for these hotspots. We tested the relationship between biomass and herbaceous
species richness/diversity in savanna sodic sites across varying biomass levels obtained through different
herbivore exclosures. LOWESS and quadratic regression analyses revealed a unimodal species richness/
diversity–biomass relationship for biomass <2 500 kg ha−1. Species richness and diversity in the sodic zone peaked
at 1 300 kg ha−1, followed by a steady decline. At biomass levels exceeding 2 500 kg ha−1, i.e. where herbivores
have been excluded for 10 years, the decline in species richness and diversity stabilised. Despite many debates
surrounding unimodal relationships and the intermediate disturbance hypothesis, this study confirmed a peak
in species richness and diversity at intermediate biomass levels in a herbivory-adapted ecosystem. Herbivores
drive ecosystem heterogeneity and enhance herbaceous species richness and diversity by keeping biomass at
intermediate levels (i.e. <2 500 kg ha−1 for this sodic site
Ha-Dibbur Ha-Ivri
No full textHebrew Speech, a manual for beginners for the study of Hebrew according to the Natural Method). Author: M. Krinsky. Illustrator: H. Goldberg. Publisher: Ha-Or Publishing. . 146 pp. 254 b/w ills. (+1 color chart) + cover b/w ill. primer.Digital imagedigitize
Author Ha Jin at Kalamazoo College
No full textPhotographer unknown.Author Ha Jin's book "Waiting" was selected for the 2002 Summer Common Reading program at Kalamazoo College. The author visited campus that year as part of the program
Developing A Marketing Recruitment Strategy For International Business
No full textOver the last 20 years, recruiting strategies have changed considerably due to the expansion of technology and the Internet. Human resources are also contemplated as the core competitive factor of businesses. This research is conducted to systematize the theoretical basis related to recruitment marketing. Moreover, at various phases, it employs both qualitative and quantitative research approaches.
In terms of the empirical component, the owner of the corporate case provided qualitative data. In contrast, quantitative data from possible candidates were reviewed. The theoretical portion gives the audiences a fundamental understanding of recruiting and the use of a recruitment marketing strategy. The author researched some surveys and case studies to gather data from both employees and employers.
On the whole, the research findings disclosed the importance of recruitment marketing to international enterprises. Businesses should focus on recruitment marketing to improve recruitment efficiency and reach a bigger pool of potential talents. In the end, the author designated some recommendations for businesses to improve recruitment marketing effectiveness
Impatto ambientale e sussistenza delle troticolture di montagna nel Trentino
No full textNel Trentino, l’abbondante presenza di acque tipiche della “Zona della Trota” ha favorito il diffondersi della troticoltura fin dal XIX
secolo. La continua ricerca di miglioramento nelle attività agricole integrative anche su terreni marginali, ha portato alla realizzazione di molti piccoli impianti per l’allevamento dei salmonidi, costruiti all’inizio in terra battuta e poi in calcestruzzo per resistere all’erosione dei
corsi d’acqua circostanti, e per aumentarne il carico e facilitarne la gestione, quasi sempre familiare. Su 53 impianti oggetto di indagini recenti, 30 hanno una superficie delle vasche inferiore a 3.000 m2. Solo 5 superano i 10.000 m2. I troticoltori hanno bilanciato il limite alla produzione rappresentato dalle acque fredde (nel Trentino occorrono 15-20 mesi per aggiungere la taglia commerciale, contro gli 11-13 della pianura) col vantaggio di ottenerere trote con carni più compatte, pagate di più al conferimento. Alla minor produzione consentita da un ambiente severo corrisponde un impatto ambientale più contenuto, oggi richiesto dalla Grande Distribuzione Organizzata (GDO) con il riconoscimento di maggiore remunerazione, alle seguenti condizioni: - il valore dell’Indice Biotico Esteso (IBE) dell’ambiente acquatico a monte della pescicoltura deve essere non inferiore a 10 (1a Classe di Qualità Biologica), mentre quello dell’ambiente a valle deve essere non inferiore a 8 (2a Classe); - è vietato l’uso di ossigenatori elettromeccanici e/o l’iniezione di ossigeno liquido con la finalità di aumentare la densità di allevamento; - la densità di allevamento non deve mai superare i 20 kg/m3. In questo lavoro sono state prese in esame sei troticolture. A monte ed a valle di ciascuna, per un periodo di tre anni, sono stati rilevati i principali parametri chimico-fisici e sono state analizzate le comunità del macrozoobenthos (metodo IBE), al fine di verificare l’impatto ambientale e il rispetto del disciplinare concordato con la GD
All of Life as Worship, with Theological Librarian, PhD Candidate, and Author Sam Ha
No full textSam Ha, PhD Candidate and Meeter Center for Calvin Studies Curator, recently released his book, A Day of Worship: Adoring God in Every Moment. The book is a pastorally-rich, theologically in-depth exploration of how each moment of life-mundane and special-can be a form of worship before God. Within its first week, it became the 2nd most sold book in Christianity & theology books in Sam’s home country of Korea
Semiometrics: producing a compositional view of influence
No full textHigh-impact academic papers are not necessarily the most cited. For example, Einstein's 'Special Relativity' paper from 1905 received (and continues to receive) fewer citations from other papers than his 'Brownian Motion" paper of the same year, despite the former radically changing the course of an entire scientific discipline to a much greater extent. Similarly, 'impact' metrics using citation count alone are, it is argued, not adequate for determining the scientific influence of papers, authors or small groups of authors. Although valid, they remain controversial when used to determine influence of larger groups or journals. While the term 'impact' has become closely linked to a journal's citation-based Journal Impact Factor score, this thesis uses the term 'influence' to describe the wider effectiveness of research, combining citation and metadata analysis to allow richer calculations to be performed over large-scale document networks. As a result, more qualitative influence ratings can be determined and a broader outlook on scientific disciplines can be produced. These ratings are best applied using an ontology-based data source, allowing more efficient inference than under a traditional RDBMS system, and allowing easier integration between heterogeneous data sources. These metrics, termed 'Semantic Bibliometrics' or 'Semiometrics', can be applied at a variety of levels of granularity, allowing a compositional framework for impact and influence analysis. This thesis describes the process of data preparation, systems architecture, metric value and data integration for such a system, introducing novel approaches at all four stages, thereby creating a working semiometrics system for determining influence at different semantic levels of granularity
Detection of large sequence insertions by a hybrid approach that combine de novo assembly and resequencing of medium-coverage genome sequences
No full textLarge sequence insertion (LSI) is one of the structural variations (SVs) that may cause phenotypic differences in plants. To identify the LSIs using medium-coverage sequencing data of four wild soybean (Glycine soja) genotypes, we designed a hybrid approach combining de novo assembly and read mapping. Total reads and reads with both ends unmapped were independently assembled into “ordinary contigs” and “orphan contigs”, respectively, and subjected to pairwise alignment and stringent filtering. This approach predicted 24 LSIs averaging 2,682 bp in size, with no overlap with SVs detected by Pindel, BreakDancer, or ScanIndel, and they were validated by PCR. Compared with the soybean (Glycine max) reference genome, 20 LSIs were located outside genic regions. One of the four LSIs within a genic region, LSI05, is located in the coding DNA sequence region of a protein kinase superfamily gene (Glyma.08G123500). It caused delayed translation initiation and loss of 24 amino acids in the wild soybean genotype CW12. LSI05 was more frequently observed in 29 G. soja accessions than in 34 G. max accessions. Identified LSIs would be genomic resources harboring novel gene contents for studying SVs and improving crops. Moreover, our cost-efficient approach may be applicable to other plant species.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
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To Define the Mechanistic Basis for the Effect of RECK Alternative Isoform Expression on Cell Migration
No full textFor many types of animal cells, migration is essential for their physiological function. Long distance crawling is required for the development of a nervous system and for the ability of macrophages to accumulate at sites of infection. In response to a wound, resident fibroblasts migrate to the wound site and promote the wound healing process. Furthermore, cancer metastasis involves the ability of cancer cells to transform their morphology and acquire an ability to migrate. A better understanding of cell migration would have implications for normal development and could yield therapies for multiple different disease states, including fibrosis, atherosclerosis, and metastasis. Alternative polyadenylation (APA) is the process by which the same genetic locus can produce multiple transcripts ending at different polyadenylation sites. Coding sequence APA can change the length of the amino acid and can also switch the function of the protein. Proliferating cells, cancer cells, and stem cells in the early stages of mouse development and tumors tend to use proximal polyadenylation sites and commonly show rapid cell migration. Our laboratory has discovered that fibroblast migration can be regulated through polyadenylation site selection. To date, however, no studies have been performed to research how cell migration and invasion can be controlled by APA.Reversion-inducing-cysteine-rich protein with kazal-like motifs (RECK) suppresses cell migration. Previous studies have documented a role for RECK on the cell surface in inhibiting MMP activity via its Kazal-like motifs. RECK has also been implicated in tubulin dynamics and in anterior-posterior polarity. Our lab discovered through an RNA-Seq-based screen that there are short and long RECK isoforms that are generated by coding region alternative polyadenylation. In this dissertation, I explain how cell migration and invasion can be controlled by APA via alternative isoform expression of the RECK protein. I show that the short RECK isoform promotes cell migration and that this result is mediated by short RECK and long (canonical) RECK interaction. Furthermore, I propose that RECK APA can regulate cell migration not only through its established role of modifying matrix metalloproteinases but also via its roles in affecting tubulin post-translational modifications (PTMs). These studies provide a much more detailed and mechanistic model for the biological functions of RECK alternative isoform use
Recommendations for author signatures on scientific output at the Universitat Oberta de de Catalunya
No full textAquest document ha estat actualitzat per "Author signature recommendations for scientific output at the Universitat Oberta de Catalunya", aprovat el 20 de març de 2018. Disponible a: http://hdl.handle.net/10609/76965Este documento ha sido actualitzado por "Author signature recommendations for scientific output at the Universitat Oberta de Catalunya", aprovado el 20 de marzo de 2018. Disponible a: http://hdl.handle.net/10609/76965El 9 d'octubre de 2014 la Comissió de Recerca i Doctorat de la Universitat va aprovar les Recomanacions per a la signatura dels autors en la producció científica de la Universitat Oberta de Catalunya. Aquest document és un recull de recomanacions per al personal de la UOC pel que fa a la seva signatura en qualsevol publicació científica en què participi. Aquestes recomanacions volen el següent: fomentar l'ús d'una signatura única; fomentar l'ús correcte de la filiació institucional dels autors de la UOC; millorar i assegurar una correcta visibilitat dels autors en les bases de dades de publicacions, repositoris, cercadors a la xarxa, etc.; facilitar el seguiment de la producció científica de la UOC; fomentar l'ús d'una signatura de correu electrònic consistent i que doti de solidesa la marca UOC.El 9 de octubre de 2014 la Comisión de Investigación y Doctorado de la Universidad aprobó las Recomendaciones para la firma de los autores en la producción científica
de la Universitat Oberta de Catalunya. Este documento es una compilación de recomendaciones para el personal de la UOC en lo referente a su firma en cualquier publicación científica en la que participe. Estas recomendaciones buscan: fomentar el uso de una firma única; fomentar el uso correcto de la filiación institucional de los autores de la UOC; mejorar y asegurar una correcta visibilidad de los autores en las bases de datos de publicaciones,
repositorios, buscadores en la red, etc.; facilitar el seguimiento de la producción científica de la UOC; fomentar el uso de una firma de correo electrónico consistente y que dote de solidez a la marca UOC.On 9 October 2014, the Research and Doctorate Scientific Committee approved the Recommendations for author signatures on scientific output at the Universitat Oberta de de Catalunya. This document presents a series of recommendations for UOC staff on signing scientific publications to which they have contributed. These recommendations are intended to: encourage authors to use a unique signature; promote the correct identification of UOC authors' affiliations;
ensure satisfactory visibility of UOC authors in publication databases, repositories, web searches, etc.; facilitate the monitoring of the UOC's scientific output; promote the use of a standardised email signature that strengthens the UOC's brand image
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