12 Matching Annotations
  1. Mar 2021
    1. In a recent study, based on a correlated valence bondapproach,8Shaiket al.proposed that a fourth bond is necessaryto explain the C2spectrum at low energy. Within a correlated res-onating valence bond approach, they have found that the 2σand 3σmolecular orbitals, afters–phybridization, change their nature ascompared to standard molecular orbital theory and show a corre-sponding bonding character. By taking into account the remainingtwoπorbitals, obviously bonding, they argued that an unexpectedquadruple bond should be a more appropriate description of theC2molecule. This result was rather surprising, especially consideringthat quadruple bonds should very rarely occur.

      CC quadruple bond

    1. In main group elements, however, the maximum number ofbonds between two atoms has remained at three,6–8although amaximum bond order of four in C2and the isoelectronicspecies CN+, BN and CBhas been proposed.9,10However, thisproposal has been largely debated and has stimulated heateddiscussion.11–13Shaiket al.9reported that the fourth bondin C2has a non-negligible bond dissociation energy ofB12–17 kcal mol1based on high level valence bond calculations.However, the experimental bond dissociation energy of C2wasfound to be lower than that of HCRCH.14This has igniteddoubt in assigning true quadruple bonding in C2.11–13Theexperimental14C–C distance in C2(1.255 Å) is longer than thatin HCRCH (1.203 Å). The calculated force constant values arealso smaller for C2than HCRCH.9,15The effective bond order(EBO) introduced by Rooset al.16based on the complete-active-space-self-consistent-field (CASSCF) theory provided a value of2.16 for C2and 2.86 for HCRCH.12All these have created adilemma in ascertaining a true quadruple bond in C2, one of the

      carbon-carbon quadruple bond

  2. Nov 2020
  3. Aug 2020
  4. Jul 2020
  5. Dec 2019
    1. Four databases of citizen science and crowdsourcing projects —  SciStarter, the Citizen Science Association (CSA), CitSci.org, and the Woodrow Wilson International Center for Scholars (the Wilson Center Commons Lab) — are working on a common project metadata schema to support data sharing with the goal of maintaining accurate and up to date information about citizen science projects.  The federal government is joining this conversation with a cross-agency effort to promote citizen science and crowdsourcing as a tool to advance agency missions. Specifically, the White House Office of Science and Technology Policy (OSTP), in collaboration with the U.S. Federal Community of Practice for Citizen Science and Crowdsourcing (FCPCCS),is compiling an Open Innovation Toolkit containing resources for federal employees hoping to implement citizen science and crowdsourcing projects. Navigation through this toolkit will be facilitated in part through a system of metadata tags. In addition, the Open Innovation Toolkit will link to the Wilson Center’s database of federal citizen science and crowdsourcing projects.These groups became aware of their complementary efforts and the shared challenge of developing project metadata tags, which gave rise to the need of a workshop.  

      Sense Collective's Climate Tagger API and Pool Party Semantic Web plug-in are perfectly suited to support The Wilson Center's metadata schema project. Creating a common metadata schema that is used across multiple organizations working within the same domain, with similar (and overlapping) data and data types, is an essential step towards realizing collective intelligence. There is significant redundancy that consumes limited resources as organizations often perform the same type of data structuring. Interoperability issues between organizations, their metadata semantics and serialization methods, prevent cumulative progress as a community. Sense Collective's MetaGrant program is working to provide a shared infastructure for NGO's and social impact investment funds and social impact bond programs to help rapidly improve the problems that are being solved by this awesome project of The Wilson Center. Now let's extend the coordinated metadata semantics to 1000 more organizations and incentivize the citizen science volunteers who make this possible, with a closer connection to the local benefits they produce through their efforts. With integration into Social impact Bond programs and public/private partnerships, we are able to incentivize collective action in ways that match the scope and scale of the problems we face.

  6. Oct 2019
  7. Jan 2019
    1. sprezzatur

      Sprezzatura is a kind of practiced nonchalance, the play-it-cool mentality that conceals the strategic inner rhetorician. Think Varys in Game of Thrones. A cooler example occurs in Skyfall , in which James Bond descends through the roof of a moving train car while said roof is basically torn off and then immediately fixes his cufflinks like nothing happened. Perhaps not sensible from a narrative point of view, but certainly rhetorically appropriate for the audience and very sprezzatura. Another Renaissance example that we read in Dr. Lynch's Rhetoric I class is Christine de Pizan's The Treasure of the City of Ladies, which is like Castiglione's book if the audience were women of the court.

  8. Sep 2016
  9. Jun 2015
    1. Hopefully, Sonoma County supervisors will consider placing a road repair bond on the ballot during a high turnout election, such as the November 2016 presidential election.

      What, if anything, can citizens to to force the hand of the Supervisors to put a bond forward?<br> Because if the quotes and soundbytes hold any truth, the Board members intend to tow the gunshy company line towards being more aggressive about specific funding - and of course they might - because if it isn't part of the General Fund, they have little ability to exercise their discretion on how it is used. I see this as a great thing.