Wanted: A Maine Woods Dialogue

In his commentary on Jerry Bley’s article on the Maine Land Use Planning Commission (LURC), Mark Lapping discusses the need for serious dialogue about the future of the Maine North Woods. He believes that LURC’s mandate needs to be altered and enlarge

Sufficient Unto Themselves: Life and Economy Among the Shakers in Nineteenth-Century Rural Maine

Community self-sufficiency was an ideal that both defined and informed the Shaker experience in America. During the nineteenth century the Shakers at Sabbathday Lake Colony in New Gloucester, Maine—today the last remaining Shaker Colony in the nation— developed a sophisticated economic system that combined agricultural innovation, a far-reaching market-based trade in seeds, herbs, and medicinals, mill-based and home manufacturers, and “fancy goods” to supply the developing tourist sector. They practiced both selective cloture and a profound degree of market savvy as they confronted the maturing market economy. Mark B. Lapping is Professor of Public Policy at the Muskie School of Public Service, University of Southern Maine, in Portland. He is author of several books and many articles and is currently editing for re-publication Clarence Day\u27s classic History of Agriculture in Maine

Planners and Climate Change Action: An Approach for Communities

The authors discuss the role of planners in helping local communities prepare for the near-term effects of climate change, especially the impact of rising sea levels and increased storm severity

Ameerika kõrgharidus: arengu probleemid : aulaloeng 26. septembril 1996

http://www.ester.ee/record=b1053426*es

Coherently averaged dual-comb spectroscopy with a low-noise and high-power free-running gigahertz dual-comb laser

We present a new type of dual optical frequency comb source capable of scaling applications to high measurement speeds while combining high average power, ultra-low noise operation, and a compact setup. Our approach is based on a diode-pumped solid-state laser cavity which includes an intracavity biprism operated at Brewster angle to generate two spatially-separated modes with highly correlated properties. The 15-cm-long cavity uses an Yb:CALGO crystal and a SESAM as an end mirror to generate more than 3 W average power per comb, below 80 fs pulse duration, a repetition rate of 1.03 GHz, and a continuously tunable repetition rate difference up to 27 kHz. We carefully investigate the coherence properties of the dual-comb by a series of heterodyne measurements, revealing several important features: (1) ultra-low jitter on the uncorrelated part of the timing noise; (2) the radio frequency comb lines of the interferograms are fully resolved in free-running operation; (3) we validate that through a simple measurement of the interferograms we can determine the fluctuations of the phase of all the radio frequency comb lines; (4) this phase information is used in a post-processing routine to perform coherently averaged dual-comb spectroscopy of acetylene (C2H2) over long timescales. Our results represent a powerful and general approach to dual-comb applications by combining low noise and high power operation directly from a highly compact laser oscillator