681 research outputs found
sj-pdf-1-etp-10.1177_10422587231170217 – Supplemental material for Advancing (Neuro)Entrepreneurship Cognition Research Through Resting-State fMRI
No full textSupplemental material, sj-pdf-1-etp-10.1177_10422587231170217 for Advancing (Neuro)Entrepreneurship Cognition Research Through Resting-State fMRI by Frédéric Ooms, Jitka Annen, Rajanikant Panda, Paul Meunier, Luaba Tshibanda, Steven Laureys, Jeffrey M. Pollack and Bernard Surlemont in Entrepreneurship Theory and Practice</p
Uncertainty principles connected with the Mobius inversion formula
No full textWe say that two arithmetic functions and form a \emph{M\"{o}bius pair} if for all natural numbers . In that case, can be expressed in terms of by the familiar M\"{o}bius inversion formula of elementary number theory. In a previous paper, the first-named author showed that if the members and of a M\"{o}bius pair are both finitely supported, then both functions vanish identically. Here we prove two significantly stronger versions of this uncertainty principle. A corollary of our results is that in a nonzero M\"{o}bius pair, one cannot have both $\sum_{f(n) \neq 0}\frac{1}{n
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On the Fourier-Jacobi Expansion of Quaternionic Modular Forms on Spin(8)
No full textIn this dissertation, we study a class of non-holomorphic, cohomological automorphic functions on the split, simply connected, spin group G=Spin(4,4). Following ideas of Gross-Wallach, Gan-Gross-Savin, M. Weissman, and A. Pollack, we term these automorphic functions quaternionic modular forms on G, and analyze a theory of scalar-valued Fourier coefficients associated to them. Our results build parallels between the theory of quaternionic modular forms on G, and the arithmetically rich theory of genus two Siegel modular forms. The main result states that a level one quaternionic modular form on G is determined by its primitive Fourier coefficients. As an input to this result, we develop a theory of Fourier-Jacobi expansions for quaternionic modular forms, in which the non-degenerate coefficients are themselves genus two Siegel modular forms. Our primary application strengthens earlier joint work of the author with J. Johnson-Leung, I. Negrini, M. Roy, and A. Pollack. More precisely, in this dissertation we show that the level one quaternionic modular forms on SO(4,4) that arise as theta lifts from Sp(4) admit an elementary Fourier coefficient theoretic characterization, which is akin to a characterization of the classical Saito-Kurokawa subspace proven by D. Zagier
The long-wavelength view of GG Tau A: rocks in the ring world
No full textWe present the first detection of GG Tau A at centimetre wavelengths, made with the Arcminute Microkelvin Imager Large Array at a frequency of 16 GHz (λ = 1.8 cm). The source is detected at >6 σrms with an integrated flux density of S16GHz = 249 ± 45 µJy. We use these new centimetre-wave data, in conjunction with additional measurements compiled from the literature, to investigate the long-wavelength tail of the dust emission from this unusual protoplanetary system. We use an MCMC-based method to determine maximum likelihood parameters for a simple parametric spectral model and consider the opacity and mass of the dust contributing to the microwave emission. We derive a dust mass of Md ~ 0.1 Msun, constrain the dimensions of the emitting region and find that the opacity index at λ > 7 mm is less than unity, implying a contribution to the dust population from grains exceeding ~4 cm in size. We suggest that this indicates coagulation within the GG Tau A system has proceeded to the point where dust grains have grown to the size of small rocks with dimensions of a few centimetres. Considering the relatively young age of the GG Tau association in combination with the low derived disc mass, we suggest that this system may provide a useful test case for rapid core accretion planet formation models
Pitching Power: Increasing Alternatives Through Signals in New Venture Funding
No full textNew firms face challenging financing markets due to their liabilities of newness (Stinchcombe & March, 1965). As a result, entrepreneurs must seek out alternative financing avenues (Berger & Udell, 1998) and surrender equity to investors to receive funds needed for growth. Entrepreneurs use the business pitch as their primary tool to present their value proposition to investors through a combination of storytelling and sensegiving (Lounsbury & Glynn, 2001). The content of a business pitch can be crafted in a way that delivers a favorable impression of the opportunity and the entrepreneurial team (Pollack et al., 2012). What has not been investigated is whether signals sent through the business pitch can improve an entrepreneur's negotiating position. This analysis builds on prior research relating to entrepreneurial pitching behaviors and decision making (Thompson, 2014; Ellsberg, 1961) by focusing on the unexplored relationship between an entrepreneur's signals and deal structure. At the stage of a business pitch, the entrepreneur must selectively communicate information (in a finite amount of time) about themselves and the opportunity as there is asymmetric information about the opportunity (signaling theory) in a way that makes their opportunity attractive to investors, potentially creating more than one investor alternative for the entrepreneur to select reducing dependency on a single investor and their proposed deal terms (power-dependence theory). The determinants of venture quality (human capital, social capital, intellectual capital, and financial capital) were theorized to increase the quantity of investor alternatives, and subsequently improve the negotiating position of the entrepreneur. In addition, the relationship between high venture quality signals and the number of investor alternatives was theorized to be moderated by the signal characteristics of cost and honesty. Though support was not found for these hypotheses based on the selected dataset used in the empirical portion of the study, qualitative responses obtained by entrepreneurs and limitations that came to light when analyzing the dataset create the need for further research on the topic. The computer-aided text analysis linguistic dictionaries and framework established for this investigation provide a model to be utilized in these future studies
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Metagenomic investigation of the antibiotic resistance in coastal marine ecosystems
No full textA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Marine Biology from Texas A&M University-Corpus Christi in Corpus Christi, Texas.Bays adjacent to developed land are sinks for runoff and municipal wastewater. These inflows carry residual antibiotic compounds and antibiotic-resistant bacteria (ARB) that pose a threat to human and environmental health. This study aims to investigate the abundance and richness of antibiotic resistance genes (ARGs) in Copano Bay, Galveston Bay, Nueces Bay, and 1852 Pass, Texas. Each water body receives a different type of major wastewater inflow dependent on the surrounding land use, and each inflow likely carries a unique suspension of chemical inducers of ARG development. This study proposes that oysters, which can bioaccumulate contaminants from the surrounding water, are an indicator species for the investigation of antibiotic resistance in the coastal environment. Bacterial metagenomes of oyster stomach contents and overlying water were collected and sequenced using Illumina HiSeq technology. The raw sequence reads were filtered for quality and length. The 16S rRNA reads were analyzed using Quantitative Insights Into Microbial Ecology (QIIME) and the Metagenome Analyzer (MEGAN) to determine the taxonomic composition of the microbial communities. The filtered reads were also compared against the Microbial Ecology Group Antibiotic Resistance (MEGARes) database to determine the abundance and richness of ARGs. The dominant bacterial classes in each sample reflected the major wastewater inflow and the surrounding land use. Further, the oyster bacterial communities differed between (but not within) sites while the free-living bacterial communities were very similar across all sampling sites. These findings suggest that local conditions select for distinct oyster microbiota, but those same conditions do not select for distinct free-living microbiota. The abundance of ARGs ranged from 28 to 826 genes while the richness of ARGs ranged from 10 to 32 distinct types. The most abundant ARGs were the mutated tuf, rpoB, and gyrB genes. Overall, fewer ARGs were detected in the oyster samples compared to the water samples, indicating that oysters were buffered from the bioaccumulation of ARGs. Data describing the prevalence of ARGs – a promising proxy for coastal sewage pollution – can aid officials in managing healthy coastal ecosystems and safeguarding human health.Life SciencesCollege of Science and Engineerin
Organic Revelry: a Senior Project in Painting
No full text5 p.The author discusses the inspiration behind her senior painting collection, searching for the abstract texture of objects, including Heronymous Bosch, M. C. Escher, and Jackson Pollack
STRUCTURAL ANALYSIS OF TRANS-PERP HOONO
No full textI. B. Pollack, I. M. Konen, E. X. J. Li and M. I. Lester, J. Chem. Phys. 119 (19), 9981 (2003).Author Institution: Department of Chemistry, University of PennsylvaniaPeroxynitrous acid (HOONO) is a significant secondary product of the three-body reaction, one of the most important processes in the chemistry of the lower atmosphere. We have photolytically generated HOONO in a pulsed supersonic expansion and determined the structure of the trans-perp (tp) conformer of HOONO using high-resolution () infrared action spectroscopy. Recent improvements in the production of HOONO and reduction of IR laser intensity to avoid power broadening have revealed extensive rotational band structure associated with the OH overtone transition of tp-HOONO at (origin), which was previously hidden in the Subsequent analysis of the rotational band structure has yielded the ground and excited vibrational state rotational constants from a least-squares fit. Furthermore, the OH overtone transition dipole moment has been derived from the relative intensities of spectral lines arising from a- and c-type transitions. The spectral data is best simulated with a Lorentzian linewidth (at 4 K), which is attributed to lifetime broadening. Both the rotational constants and transition dipole moment are in good accord with ab initio values, confirming the spectroscopic identification of tp-HOONO. These quantities enable us to predict the spectral appearance of tp-HOONO under various experimental conditions, including atmospheric conditions
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Prevalence and distribution of a novel prophage in pandemic vibrio parahaemolyticus
No full textVibrio parahaemolyticus is endemic in marine ecosystems and is the most common cause of bacterial seafood-borne gastroenteritis worldwide. Recent years have shown a dramatic increase in global V. parahaemolyticus infections owing to the emergence and spread of the pandemic O3:K6 serotype. Further, clinical reporting has shown an expanding poleward range
resulting from climate change. In the Pacific Northwest (PNW) region of the United States, virtually all clinical cases are caused by an endemic serotype (O4:K12) despite an environmental abundance of the pandemic O3:K6 serotype. Previous analysis of PNW V. parahaemolyticus revealed that O3:K6 strains were virulence-attenuated in a zebrafish model, and subsequent
genomic analyses revealed that PNW O3:K6 strains carry a novel prophage (NW1) that may be associated with avirulent conversion. The purpose of this study was to broaden the understanding of where prophage NW1 is maintained in natural reservoirs (e.g., seawater, plankton, and oysters) in the PNW through the following objectives: 1) determine the prevalence and
distribution of prophage NW1 from a collection of 731 environmental PNW V. parahaemolyticus strains by polymerase chain reaction (PCR), and 2) analyze draft genomes of NW1+ isolates to identify the prophage integration site and determine the genetic consequences of integration (e.g., gene gain or gene loss). Results show that the pandemic O3:K6 strain was prevalent among the PNW isolates (230/731 or 31.5%), more so than the endemic O4:K12 strain (64/731 or 8.8%), and the overwhelming majority of those pandemic isolates harbored the NW1 prophage (187/230 or 81.3%). Genome analyses confirmed the same integration site and gene loss of VP1884 through VP1890 in all sequenced NW1+ isolates (n=17). Interestingly, the pandemic O3:K6 NW1+ isolates were relatively abundant in seawater and plankton samples (110/248 or 44.4% and 65/253 or 25.7%, respectively) but absent from oyster samples (0/204). This disparity may explain the near absence of clinical O3:K6 cases in this region, although the mechanism behind this observation is yet unknown and warrants further study. In summary, these results demonstrate that prophage NW1 is prevalent in the PNW environment; the majority of O3:K6 isolates carry the prophage. However, this is not a geographically or temporally isolated phenomenon, as the prophage was detected in isolates from distant locations over the past two decades. Future analyses will involve challenging zebrafish with VP1884-VP1890
O3:K6 mutants to identify the gene or genes responsible for attenuated virulence. Future analyses will also involve challenging oysters with VP1884-VP1890 O3:K6 mutants to identify the gene or genes responsible for colonization deficiency.Life SciencesCollege of Science and Engineerin
Intentions And Information In Discourse
No full textThis paper is about the flow of inference between communicative intentions, discourse structure and the domain during discourse processing. We augment a theory of discourse interpretation with a theory of distinct mental attitudes and reasoning about them, in order to provide an account of how the attitudes interact with reasoning about discourse structure. INTRODUCTION The flow of inference between communicative intentions and domain information is often essential to discourse processing. It is well reflected in this discourse from Moore and Pollack (1992): (1)a. George Bush supports big business. b. He's sure to veto House Bill 1711. There are at least three different interpretations. Consider Context 1: in this context the interpreter I believes that the author A wants to convince him that (1b) is true. For example, the context is one in which I has already uttered Bush won't veto any more bills. I reasons that A's linguistic behavior was intentional, and therefore that A believ..
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