19,482 research outputs found
Black Life Mater: Debunked!
The Black Lives Matter movement emerged in 2012 to combat racial targeting after the death of Trayvon Martin. The purpose of the movement, according to the Black Lives Matter Guiding Principles, is to serve as “an ideological and political intervention in a world where Black lives are systematically and intentionally targeted for demise” and “an affirmation of Black folks’ contributions to this society, our humanity, and our resilience in the face of deadly oppression.” From meetings with Democratic National Convention leaders, to attending a meeting at the White House at the invitation of the President, the Black Lives Matter movement is making strides in eliminating racial profiling in our society
Logistics hardware and services control system
Software system permits onsite direct control of logistics operations, which include spare parts, initial installation, tool control, and repairable parts status and control, through all facets of operations. System integrates logistics actions and controls receipts, issues, loans, repairs, fabrications, and modifications and assets in predicting and allocating logistics parts and services effectively
Backwater controls of avulsion location on deltas
River delta complexes are built in part through repeated river-channel avulsions, which often occur about a persistent spatial node creating delta lobes that form a fan-like morphology. Predicting the location of avulsions is poorly understood, but it is essential for wetland restoration, hazard mitigation, reservoir characterization, and delta morphodynamics. Following previous work, we show that the upstream distance from the river mouth where avulsions occur is coincident with the backwater length, i.e., the upstream extent of river flow that is affected by hydrodynamic processes in the receiving basin. To explain this observation we formulate a fluvial morphodynamic model that is coupled to an offshore spreading river plume and subject it to a range of river discharges. Results show that avulsion is less likely in the downstream portion of the backwater zone because, during high-flow events, the water surface is drawn down near the river mouth to match that of the offshore plume, resulting in river-bed scour and a reduced likelihood of overbank flow. Furthermore, during low-discharge events, flow deceleration near the upstream extent of backwater causes enhanced deposition locally and a reduced channel-fill timescale there. Both mechanisms favor preferential avulsion in the upstream part of the backwater zone. These dynamics are fundamentally due to variable river discharges and a coupled offshore river plume, with implications for predicting delta response to climate and sea level change, and fluvio-deltaic stratigraphy
- …