We have employed computational methods to investigate the iridium-catalyzed allylic substitution leading to the formation of enantioenriched allyl carbamates from carbon dioxide (CO₂). The reaction occurs in several steps, with initial formation of an iridium-allyl, followed by nucleophilic attack by the carbamate formed in situ from CO₂ and an amine. A detailed isomeric analysis ...

The global learning initiative at Northeastern University is focused on fostering intercultural communication skills. The Dialogue of Civilization (DOC) program serves as a mechanism to achieve such a goal by offering faculty-led international experiences. In this paper, we have presented a detailed account of a DOC program that took place in Norway. The primary objective of the program was to teach ...

This work derives upper bounds on the convergence rate of the moment-sum-of-squares hierarchy with correlative sparsity for global minimization of polynomials on compact basic semialgebraic sets. The main conclusion is that both sparse hierarchies based on the Schmüdgen and Putinar Positivstellensätze enjoy a polynomial rate of convergence that depends on the size of the largest clique in the sparsity ...

The mechanistic details of the asymmetric Ni-catalyzed reductive cyclization/carboxylation of alkenes with CO2 have been revisited using DFT methods. Emphasis was put on the enantioselectivity and the mechanistic role of Lewis acid additives and in situ formed salts. Our results show that oxidative addition of the substrate is rate-limiting, with the formed Ni(II)-aryl intermediate preferring a ...

Sedimentary records of Early Pleistocene (~2.6–0.8 Ma) glaciations are sparse on shelves, yet trough mouth fans on adjacent continental slopes provide a continuous record of ice-sheet and climate development throughout the Quaternary. Here, we interpret high-quality 3D seismic reflection data combined with borehole and chronostratigraphic information from a shelf-slope setting in the southwestern ...

There are a series of well-established risk factors of coronary heart disease (CHD): hypertension, high total cholesterol, smoking, diabetes, older age and male sex [1]. Some studies have paid attention to interactions between them, but have mainly looked at multiplicative interactions with age and/or sex. For example, relative risks associated with many risk factors are larger at younger compared ...

Bakgrunn: Endrede politiske og organisatoriske rammebetingelser aktualiserer spørsmål om omprioriteringer, omorganiseringer, nye arenaer og nytt innhold i den kommunale ergoterapitjenesten. I studien undersøker vi hvordan ergoterapi fremstilles i helsepolitiske styringsdokumenter. Vi utforsker spesifikt hvilke roller ergoterapeuter tilskrives i fremtidens primærhelsetjeneste, og hva kommuneergoterapeuter ...

Aim To explore healthcare workers' experiences of the changed caring reality during the COVID-19 pandemic in Sweden. <p><p>Design An online fully mixed-methods design. <p>Methods A web-based self-reported questionnaire with fixed and open-ended answers collected data from March to April 2021, analysed in three steps. First, free-text questions were analysed by qualitative content analysis. Then ...

Background. The complement system, an upstream recognition system of innate immunity, is activated upon SARS-CoV-2 infection. To gain a deeper understanding of the extent and duration of this activation, we investigated complement activation profiles during the acute phase of COVID-19, its persistence post-recovery and dynamic changes in relation to disease severity.<p> <p>Methods. Serial ...

This study examines a cooperative non-orthogonal multiple access (NOMA) network utilizing an energy-constrained unmanned aerial vehicle (UAV) relay (UAVR) to expand coverage and improve network throughput. In order to provide energy to the UAVR, we consider the hybrid simultaneous wireless information and power transmission (SWIPT) method, which allows the UAVR to harvest energy from the source ...