Source and vortex distributions in the linearised theory of steady supersonic flow

The hyperbolic character of the differential equation satisfied by the velocity potential in linearised supersonic flow entails the presence of fractional infinities in the fundamental solutions of the equation. Difficulties arising from this fact can be overcome by the introduction of Hadmard’s ‘finite part of an infinite integral’. Together with the definition of certain counterparts of the familiar vector operators this leads to a natural development of the analogy between incompressible flow and linearised supersonic flow. In particular, formulae are derived for the field of flow due to an arbitrary distribution of supersonic sources and vortices. Applications to Aerofoil theory, including the calculation of the downwash in the wake of an aerofoil, are given in a separate report

European development experience on energy storage wheels for space

High speed fiber composite rotors suspended by contactless magnetic bearings were produced. European industry has acquired expertise in the study and fabrication of energy storage wheels and magnetic suspension systems for space. Sufficient energy density performance for space viability is being achieved on fully representative hardware. Stress cycle testing to demonstrate life capability and the development of burst containment structures remains to be done and is the next logical step

Address at the Lincoln Charter of the Forest Conference, Bishop Grosseteste University: The Charter of the Forest: Evolving Human Rights in Nature

This conference is a singular event, long over due. It has been 258 years since William Blackstone celebrated “these two sacred charters,”1 Carta de Foresta and Magna Carta, with his celebrated publication of their authentic texts. In 2015, the Great Charter of Liberties enjoyed scholarly, political and popular focus. The companion Forest Charter was and is too much neglected.2 I salute the American Bar Association, and Dan Magraw, for the ABA’s educational focus of the Forest Charter, as well as Magna Carta. Today we restore some balance with this conference’s searching and insightful examination of the Forest Charter’s significance

David Ross Brower and Nature\u27s Laws

“We\u27re not blindly opposed to progress. We\u27re opposed to blind progress.” These words summed up the style and power of David R. Brower. Indelibly, he chiseled toe hold after toe hold on an arduous climb across the rock face of the commercial forces driven to seek short-term gain from natural resources and oblivious to the longer-term costs to the Earth that the ecological sciences would chronicle but that economists would disregard as mere “externalities” in their classical market models. As Brower campaigned to protect the wilderness of North America and the Earth, through his sheer conviction and abundant eloquence, he emerged between 1952 and 1988 as an architect of contemporary environmental government policy toward nature

From Little Acorns

Inaugurating Writing Nature: A Seasonal Program of Readings of Nature Writings, under the shared auspices of the Teatown Lake Reservation and the Hudson Valley Writers Center. Presented at the Hudson Valley Writers Center, Sleepy Hollow, New York

Updating New York’s Constitutional Environmental Rights

The stakes are high as New York State considers whether to amend the constitution. The electorate contemplates the gathering crises of sea level rise, disruption of weather patterns, intensified summer heat waves, and other climate change impacts. New York also faces escalating environmental problems, which the newly perceived climate impacts in turn exacerbate. It is timely to debate whether or not New York should recognize the right to the environment to its constitution. In 2016, the House of Delegates of the New York State Bar Association adopted the report of its committee on the constitution, regarding the environmental conservation article XIV. That report did not take a position on whether to expand the Constitution’s existing environmental rights to recognize a broad environmental right explicitly. A task force of the association’s section on environmental and energy law examined the issue for six months and concluded that there is merit in recognizing the right to the environment. This article introduces the emergence of this issue in its historical context

Transnational Perspectives on the Paris Climate Agreement Beyond Paris: Redressing American Defaults in Caring for Earth’s Biosphere

Anxiety about the fate of human civilization is rising. International Law has an essential role to play in sustaining community of nations. Without enhancing International Environmental Law, the biosphere that sustains all nations is imperiled. Laws in the United States can either impede or advance global environmental stewardship. What is entailed in such a choice? The biosphere is changing. At a time when extraordinary technological prowess allows governments the capacity to know how deeply they are altering Earth\u27s biosphere, nations experience a perverse inability to cooperate together. The Arctic is melting rapidly, with knock on effects for sea level rise and alterations in the hydro-logic cycle world-wide. As both the UN Global Environment Outlook (Geo-5) or the Special Report of the Intergovernmental Panel on Climate Change “Global Warming 1.5° C” indicate, global environmental trends are destabilizing and can overwhelm societies on each continent. Governments do not respond effectively. Their tepid response to climate change, as embodied in the Paris Agreement of 2015, is the best evidence that States need to reassess their cooperation. Shallow considerations of realpolitik no longer suffice. Nor do otherwise conventional questions, born of once sound practices from the “business as usual” eras, about how governments might methodically shape new treaties or incrementally advance international law while Earth\u27s biosphere rapidly degrade. States will need to rediscover the benefits and burdens of international cooperation. The aspirational norms of the United Nations Charter are still in force, albeit too little encouraged. More than needing reaffirmation, they require progressive development. Collaborative principles of law can be framed to provide the shared vision that States will require as the Earth\u27s human population grows from 7.6 billion today toward 9.8 billion by 2050. This article suggests the contributions that international environmental law can made toward this objective

The \u27Ascent of Man\u27: Legal Systems and the Discovery of an Environmental Ethic

A decade ago, firefighters in a warehouse on the Rhine in Switzerland washed chemicals, solvents, and mercury into the river, destroying all life in the river for miles, killing millions of fish, and endangering the water supplies of cities in Germany and the Netherlands. This tragedy galvanized the river valley states into action. They vowed to clean up the river, not just from that incident but from the effects of having used the river as a sewer for two centuries. But how clean is clean? The goal for this calculated plan, which will take decades to achieve, is symbolized by the salmon. When salmon spawn again in the Rhine, then it will have been restored. Will these nations succeed? If the twenty five year history of our Clean Water Act offers a precedent, “restoring and maintaining” the waters of the United States for fish and swimming, the prognosis may be good