Nucleosynthesis in advective disc and outflow: possible explanation for overabundances in winds from X-ray binaries

Multiple spectroscopic lines of different elements observed in winds from X-ray binaries (XRBs), based on one zone model, indicate super-solar abundance of elements, e.g. Mg, Si, S, Ar, Ca, Cr, Mn, Co. The one zone model considers similar hydrodynamics of underlying winds. In order to find a possible origin of these overabundances, we explore nucleosynthesis in advective, geometrically thick, sub-Keplerian, accretion disc in XRBs and active galactic nuclei (AGNs), and further in outflows launched from the disc. Based on flow hydrodynamics and solving nuclear network code therein by semi-implicit Euler method, we obtain abundance evolution of the elements. Although the density is very low, due to very high temperature of advective disc than Keplerian Shakura-Sunyaev disc (SSD), it is quite evident that significant nucleosynthesis occurs in the former. As the temperature at the base of the outflow is constrained by the temperature of disc, nucleosynthesis also occurs in the outflow contingent upon its launching temperature. Till now, the outer region of XRB and AGN discs is understood to be colder SSD and inner region to be advective disc, together forming a disc-wind system. Hence, newly evolved abundances after processing through outflow can change the abundances of different elements present in the environment of the whole disc-wind system. We find 2-6 times overabundant Mg, Si, Ar, Cr with respect to the respective solar abundances, which is consistent observationally. Thus for most XRBs, when only iron lines are present, inclusion of these evolved abundances is expected to change the observational analysis drastically.Comment: 12 pages, 14 figures, 2 tables, Accepted for publication in MNRA

Kinetic Energy Changes During Formation of Li-H Bond

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Resiliency in Disaster: The Relevance of Indigenous Land-based Practice

The COVID-19 pandemic, as a Natural Disaster, has significantly affected the vulnerable portion of society, particularly Indigenous and visible minority immigrants in Canada. As a color settler immigrant family in Indigenous land in Treaty 6 territory, we explore Indigenous Land-based Education (ILBE) from Indigenous Elders and Knowledge-keeper’s land-based stories, traditional knowledge, resiliency, and practice. As a family, we have been learning and practicing ILBE to develop resiliency during natural disasters like the COVID-19 pandemic. This paper used land-based decolonizing autoethnography to understand health and wellness from an ILBE perspective. We discussed why ILBE matters for building resiliency, resistance, and self-determination within a family and community; how can it help others? We have seen how COVID-19 has severely impacted our mental and physical health. During the high climate change era, many pandemics are yet to come, and the ILBE can build resiliency for both humans and non-humans

Biodegradative Threonine Dehydratase. Reduction of Ferricyanide by an Intermediate of the Enzyme-Catalyzed Reaction

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/65912/1/j.1432-1033.1978.tb12706.x.pd

ALIVE: A Low-Cost Interactive Vaccine Storage Environment Module ensuring easy portability and remote tracking of operational logistics to the last mile

The COVID-19 pandemic has profoundly reshaped our lives, prompting a search for solutions to its far-reaching effects. Vaccines emerged as a beacon of hope, yet reaching remote areas faces last-mile hurdles and cost issues due to loss of vaccine potency due to poor temperature regulation of the storage units and unanticipated vaccine wastage en route, a common occurrence in conventional vaccine transportation methods. We introduce ALIVE, a low-cost Interactive Vaccine Storage Environment module. ALIVE provides an off-grid, self-sufficient solution for vaccine storage and transport, enabled by active cooling technology. ALIVE's innovation lies in its integration with the Internet of Things (IoT), allowing real-time monitoring and control. This IoT-enabled Application Programming Interface (API) features a data acquisition and environment parameter control system, managing oversight and decision-making. ALIVE's compact, lightweight design makes it adaptable to various logistical scenarios, while its versatility enables it to maintain both time-invariant and time-dependent thermophysical and spatial parameters. Operationalized through a PID algorithm, ALIVE ensures precise temperature control within the vaccine chamber. Its dynamic features, such as remote actuation and data sharing, demonstrate its adaptability and potential applications. Despite the frugal nature of development, the system promises significant benefits, including reduced vaccine loss and remote monitoring advantages. Collaborations with healthcare partners seek to further enhance ALIVE's readiness and expand its impact. ALIVE revolutionizes vaccine logistics, offering scalable, cost-effective solutions for bridging accessibility gaps in challenging distribution scenarios. Its adaptability positions it for widespread application, from last-mile vaccine delivery to environment-controlled supply chains and beyond.Comment: Presented at the International Conference on Robotics, Control, Automation, and Artificial Intelligence (RCAAI 2023). Corresponding: [email protected]

A Molecular Orbital Study of Bonding in the Ammonia- Borane & Carbonyl-Borane Complexes

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