625 research outputs found
A carbon budget for a eutrophic marine ecosystem and the role of sulfur metabolism in sedimentary carbon, oxygen and energy dynamics
Organic carbon was budgeted for an experimental marine ecosystem which received 21.2 mol C m–2 of allochthonous sewage sludge plus 12.4 mol C m–2 in situ net daytime production over a 99 day experiment. The fate of carbon, in order of importance, was remineralization, storage in the sediments and export. Sediment carbon metabolism was dominated by sulfate reduction which resulted in the dissociation of organic carbon remineralization from oxygen consumption and energy cycling. The sediments were inefficient in processing sedimented carbon and its associated chemical energy. About 70% of the energy reaching the sediments as organic carbon remained as accumulated carbon and sulfide minerals at the end of the experiment (71% of remaining energy was in the form of unrespired C and with the remaining 29% of energy stored as precipitated sulfides). Sediment oxygen consumption was a poor estimator of benthic metabolism. Total CO2 flux from the sediments was, however, balanced by the sum of sediment oxygen consumption plus oxygen equivalents stored as sedimentary sulfides. Sludge additions drove the experimental ecosystem to a eutrophic state with periods of severe oxygen depletion, death of macrofauna, hydrogen sulfide concentrations in excess of 1 mmolar in surface sediments, and the presence of a white filamentous bacterial mat over the sediment surface
Growth in ataxia telangiectasia
BACKGROUND: Ataxia telangiectasia (A-T) is a DNA repair disorder that affects multiple body systems. Neurological problems and immunodeficiency are two important features of this disease. At this time, two main severity groups are defined in A-T: classic (the more severe form) and mild. Poor growth is a common problem in classic A-T. An objective of this study was to develop growth references for classic A-T. Another objective was to compare growth patterns in classic A-T and mild A-T with each other and with the general population, using the CDC growth references. A final objective was to examine the effects of chronic infection on height. RESULTS: We found that classic A-T patients were smaller overall, and suffered from height and weight faltering that continued throughout childhood and adolescence. When compared to the CDC growth references, the median heights and weights for both male and female patients eventually fell to or below the 3rd centile on the CDC charts. Height faltering was more pronounced in females. Birthweight was lower in the classic A-T group compared to mild A-T and the general population, whereas birth length was not. Finally, we investigated height and BMI faltering in relation to number of infections and found no association. CONCLUSIONS: Classic A-T appears to affect growth in utero. Although children appear to grow well in very early life, faltering begins early, and is unrelenting
Disfluency in dialogue:an intentional signal from the speaker?
Disfluency is a characteristic feature of spontaneous human speech, commonly seen as a consequence of problems with production. However, the question remains open as to why speakers are disfluent: Is it a mechanical by-product of planning difficulty, or do speakers use disfluency in dialogue to manage listeners' expectations? To address this question, we present two experiments investigating the production of disfluency in monologue and dialogue situations. Dialogue affected the linguistic choices made by participants, who aligned on referring expressions by choosing less frequent names for ambiguous images where those names had previously been mentioned. However, participants were no more disfluent in dialogue than in monologue situations, and the distribution of types of disfluency used remained constant. Our evidence rules out at least a straightforward interpretation of the view that disfluencies are an intentional signal in dialogue. © 2012 Psychonomic Society, Inc
Predator-Induced Vertical Behavior of a Ctenophore
Although many studies have focused on Mnemiopsis leidyi predation, little is known about the role of this ctenophore as prey when abundant in native and invaded pelagic systems. We examined the response of the ctenophore M. leidyi to the predatory ctenophore Beroe ovata in an experiment in which the two species could potentially sense each other while being physically separated. On average, M. leidyi responded to the predator’s presence by increasing variability in swimming speeds and by lowering their vertical distribution. Such behavior may help explain field records of vertical migration, as well as stratified and near-bottom distributions of M. leidyi
Instant Internationalization of Emerging Economy New Ventures:The Evidence of Family-Owned Venture from Moldova
Entrepreneurship, export orientation and economic growth
In this paper the relationship between a country’s prevalence of new ventures and its rate of economic growth is investigated, while taking into account new ventures’ export orientation. It is generally acknowledged that new venture creation as well as export activity may both be important strategies for achieving national economic growth. However, to our knowledge no attempt has been made to investigate empirically the role of export-driven new ventures in economic growth. We focus on the national level and use data for a sample of 34 countries over the period 2002–2008. Our results suggest that, on top of a positive relation between entrepreneurial activity in general and subsequent macroeconomic growth, there is an additional positive effect of export-oriented early-stage entrepreneurship in higher-income countries. However, there is no such additional effect in lower-income countries
Antecedents and consequences of effectuation and causation in the international new venture creation process
The selection of the entry mode in an international market is of key importance for the venture. A process-based perspective on entry mode selection can add to the International Business and International Entrepreneurship literature. Framing the international market entry as an entrepreneurial process, this paper analyzes the antecedents and consequences of causation and effectuation in the entry mode selection. For the analysis, regression-based techniques were used on a sample of 65 gazelles. The results indicate that experienced entrepreneurs tend to apply effectuation rather than causation, while uncertainty does not have a systematic influence. Entrepreneurs using causation-based international new venture creation processes tend to engage in export-type entry modes, while effectuation-based international new venture creation processes do not predetermine the entry mod
PenQuest Volume 1, Number 2
Table of Contents for this Volume:
Untitled by Julie Ambrose
Night by Judith Gallo
Untitled by Judy Gozdur
the shamans by Charles Riddles
Untitled by Jerry Connell
Untitled by Laura Woods
Untitled by LEMA
Wicked Bird by Laura Jo Last
Untitled by Rick Dentos
Untitled by Jeni Moody
Untitled by Bettie W. Kwibs
Untitled by Joann Stagg
The Protector Stood by Laura Jo Last
Visions of Salome by Charles Riddles
Untitled by Thomas Tutten
Kennesaw Line by Don Ova-Dunaway
Stone Blood by Mary Ellen C. Wofford
Untitled by Roger Whitt Jr.
Untitled by C. Wingate
Untitled by Doug Dorey
Untitled by Karen Blumberg
Untitled by Beverly Oviatt
Untitled by Virginia Shrader
The Crapulous Credo of Charles C. by Charles Riddles
the brave and the true by David Reed
Untitled by Charles Gutierrez
Canoe Creek by Patricia Kraft
Untitled by Linda Bobinger
The Man in the Iron Lung by Patricia Kraft
Untitled by Roger Whitt, Jr.
Childish Things by Kathleen Gay
Untitled by Joseph Avanzini
The Lover by Mary S. Aken
Untitled by Ann Harrington
And He Taketh Away by David Reed
Untitled by Mary Graham
Untitled by Melody A. Cummons
Untitled by Karen Blumberg
To The Poets by Judith Gallo
Untitled by Ann Harringto
International entrepreneurship in SMEs: a study of influencing factors in the textile industry
The final publication is available at Springer via http://dx.doi.org/10.1007/s11365-012-0242-3International entrepreneurship is an incipient research area with a rapidly increasing body of knowledge and contributions. An important part of this literature has focused on the analysis of the contributing factors to IE development. From these studies, this work attempts to analyse and validate through an integrative model the effect on this construct in SME of some of the main factors proposed by the literature such as Skills and Competences, Attitude and Proactiveness, Creativity and Innovation, Networking, Employees and Activity. To proceed with this aim, we conducted an empirical research focused on 174 textile SME in Spain. The results obtained confirm a positive relationship between the studied factors and the IE development. 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Mitigating theoretical and coverage biases in the design of theory-building research: an example from international entrepreneurship
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