5,529 research outputs found

    Leadership in crisis situations

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    Between The Rock and a Hard Case: Application of the Emoluments Clauses for a New Political Era

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    The election of Donald Trump in 2016 rewrote some of the traditional rules for electing presidents in the United States. Does his election portend a new breed of presidential candidate, arising from the business and celebrity arena rather than traditional government service? If so, the potential for candidates with more diverse and global business interests (and the conflicts of interest that come along with them) becomes more likely. This Essay discusses the historical intent of the Emoluments Clauses and the issue of potential presidential conflicts of interest. This Essay also examines the litigation efforts filed against President Trump to force him to divest his business interests or transfer them to a blind trust, and the search for a plaintiff with standing to bring a valid claim. Lastly, this Essay discusses potential solutions if a plaintiff with standing cannot be found, or if the courts leave the problem to be solved within the political realm

    The geometry of generalized loxodromic elements

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    We explore geometric conditions which ensure a given element of a finitely generated group is, or fails to be, generalized loxodromic; as part of this we prove a generalization of Sisto's result that every generalized loxodromic element is Morse. We provide a sufficient geometric condition for an element of a small cancellation group to be generalized loxodromic in terms of the defining relations and provide a number of constructions which prove that this condition is sharp.Comment: 22 pages. To appear in Ann. Inst. Fourie

    Structure maps for hcp metals from first principles calculations

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    The ability to predict the existence and crystal type of ordered structures of materials from their components is a major challenge of current materials research. Empirical methods use experimental data to construct structure maps and make predictions based on clustering of simple physical parameters. Their usefulness depends on the availability of reliable data over the entire parameter space. Recent development of high throughput methods opens the possibility to enhance these empirical structure maps by {\it ab initio} calculations in regions of the parameter space where the experimental evidence is lacking or not well characterized. In this paper we construct enhanced maps for the binary alloys of hcp metals, where the experimental data leaves large regions of poorly characterized systems believed to be phase-separating. In these enhanced maps, the clusters of non-compound forming systems are much smaller than indicated by the empirical results alone.Comment: 7 pages, 4 figures, 1 tabl

    Non-conventional Technologies as Alternative Solutions to the Proposed Whakamaru-Otahuhu Transmission Upgrade

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    This commentary brings together a preliminary view of the potential of non-conventional generation as a comprehensive alternative solution to the proposed Auckland transmission upgrade

    Optimal Moments for the Analysis of Peculiar Velocity Surveys

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    We present a new method for the analysis of peculiar velocity surveys which removes contributions to velocities from small scale, nonlinear velocity modes while retaining information about large scale motions. Our method utilizes Karhunen--Lo\`eve methods of data compression to construct a set of moments out of the velocities which are minimally sensitive to small scale power. The set of moments are then used in a likelihood analysis. We develop criteria for the selection of moments, as well as a statistic to quantify the overall sensitivity of a set of moments to small scale power. Although we discuss our method in the context of peculiar velocity surveys, it may also prove useful in other situations where data filtering is required.Comment: 25 Pages, 3 figures. Submitted to Ap

    A calcium‐ and voltage‐dependent chloride current in developing chick skeletal muscle.

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/109959/1/tjp19894171241.pd

    Biological properties of adriamycin bound to biodegradable polymeric carriers

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    Three different conjugates having adriamycin (ADR) bound to the side chain carboxyl groups of high-molecular weight poly (¿--glutamic acid) (PGA) either directly or by interpolation of GlyGly and GlyGlyGlyLeu spacers, respectively, were compared with respect to immunogenicity and cytotoxicity in mice as well as release of drug by lysosomal enzymes. The cytotoxic efficacy of a single i.p. dose of each conjugate (5 mg ADR-equiv./kg) against L1210 leukemia cells implanted i.p. in DBA2 mice was studied by monitoring the survival time, the body weight and the number of long-term survivors (LTS). PGA-GlyGlyGlyLeu-ADR and PGA-GlyGly-ADR significantly enhanced the mean survival time (MST) of treated animals compared with the untreated control group (T/C 148¿149%) as did free ADR (T/C 147%). The tetrapeptide-spacer containing conjugate effected the presence of LTS at day 50 (2/5) as did free ADR (1/5).\ud \ud The secondary antibody response of the drug conjugates elicited in A/J mice after repeated dosage (125 ¿g/mouse) at day 0, 14 and 28 was evaluated at day 35 using the ELISA technique. IgG titers varied from a very low value (PGA-GlyGlyGlyLeu-ADR) to moderately high levels (PGA-ADR, PGA-GlyGly-ADR) which are 2¿3 orders of magnitude below that obtained for the strong immunogen bovine IgG. The data suggest that certain parts on the surface of the conjugates are immunogenic.\ud \ud The release of extractable low-molecular weight products from the conjugates mediated by lysosomal enzymes was analyzed using reversed-phase HPLC. The release profile of ADR as well as Gly-ADR, Leu-ADR or GlyLeu-ADR was determined. The total amount of ADR released after 77 h was 3.6% for PGA-GlyGlyGly-Leu-ADR, 1.0% for PGA-GlyGly-ADR and 0.5% for PGA-ADR. With all conjugates unidentified products were produced.\ud \ud It is proposed that the mechanism of action of the polymeric conjugates under in vivo conditions may be due to pinocytic capture followed by lysosomal degradation with release of ADR
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