Energy-Economical Heuristically Based Control of Compass Gait Walking on Stochastically Varying Terrain

Investigation uses simulation to explore the inherent tradeoffs ofcontrolling high-speed and highly robust walking robots while minimizing energy consumption. Using a novel controller which optimizes robustness, energy economy, and speed of a simulated robot on rough terrain, the user can adjust their priorities between these three outcome measures and systematically generate a performance curveassessing the tradeoffs associated with these metrics.

Monarch butterflies (Danaus plexippus L.) use a magnetic compass for navigation

Fall migratory monarch butterflies, tested for their directional responses to magnetic cues under three conditions, amagnetic, normal, and reversed magnetic fields, showed three distinct patterns. In the absence of a magnetic field, monarchs lacked directionality as a group. In the normal magnetic field, monarchs oriented to the southwest with a group pattern typical for migrants. When the horizontal component of the magnetic field was reversed, the butterflies oriented to the northeast. In contrast, nonmigratory monarchs lacked directionality in the normal magnetic field. The results are a direct demonstration of magnetic compass orientation in migratory insects.

Methods & results. An enquiry into the variation of the compass off the Bahama Islands at the time of the land fall of Columbia in 1492. Appendix no. 19-Report for 1880.

Mode of access: Internet.

The bed-book of happiness: being a colligation or assemblage of cheerful writings brought together from many quarters into this one compass for the diversion, distraction and delight of those who lie abed, -a friend to the invalid, a companion to the sleepless, an excuse to the tired.

Mode of access: Internet.

The human compass.

Mode of access: Internet.

Industrie-Compass.

A classified directory of industries, with indexes to firms, places, and articles manufactured.

Without a compass. A novel.

Mode of access: Internet.

A treatise upon modern instrumentation and orchestration; containing an exact table of the compass, a detail of the mechanism, and a study of the quality of tone, and expressive character of various instruments; accompanied by numerous examples in score, from the works of the greatest masters, and from some unpublished works of the author.

Mode of access: Internet.

An epistle to Friends within the compass of Philadelphia Yearly Meeting /

Bound with Society of Friends. Green Street Monthly Meeting. A statement of facts. 1827 [7]

The American companion, or, A brief sketch of geography : which points out the climate, latitude, and longitude, bearing per compass, and distance in geographical miles of each place, from the city of Washington : together with the length of the longest days and nights, and conversely /

Mode of access: Internet.

Picturesque rides and walks, with excursions by water, thirty miles round the British metropolis; illustrated in a series of engravings, coloured after nature; with an historical and topographical description of the country within the compass of that circle.

Mode of access: Internet.

An address to friends within the compass of the yearly meeting held in Philadelphia.

Mode of access: Internet.

An Epistle to Friends of the Quarterly & Monthly Meetings within the compass of the Yearly Meeting held in Philadelphia adopted at a General Meeting of Friends at Green Street Meeting House in that city, by adjournments on the 4th, and 5th of the 6th Mo., 1827.

Bound with other Friends' pamphlets.

An Epistle from the Yearly Meeting of Friends held in Philadelphia, by adjournments from the fifteenth day of the Tenth Month, to the nineteenth of the same inclusive, 1827, to the Quarterly, Monthly, and particular Meetings of Friends within the compass of the Yearly Meeting.

Bound with other Friends' pamphlets.

Epistle to Friends within the compass of Ohio and Indiana Yearly Meeting.

"Signed by direction, and on behalf of a large committee, appointed by the Yearly Meeting of Friends in Philadelphia, in the 10th month last, to represent it in its recess, James Mott, clerk."