BLM\u27s ecosystem approach to management

Ecosystem management is about maintaining the health, diversity, and productivity of the land, i.e., clean water, abundant native perennial grasses, sustainable fish populations, healthy watersheds. We will use the ecosystem approach to streamline administrative processes and improve fiscal and environmental accountability. It involves coordinated planning at the local level, forming partnerships, and using good information to manage the land Education is key. The principles of ecosystem management form the philosophic underpinning of a new land ethic with roots in the philosophies of Roosevelt, Pinchot, Leopold, and others

A No-Go Theorem for Matter-Wave Interferometry with Application to the Neutron's Electric-Dipole Moment

A theorem that relies only on the unitary property of the Schroedinger equation and not upon any classical or semi-classical approximation negates some, but not all, suggestions that have been made for measuring the neutron's electric-dipole moment by interferometry.Comment: 9 p. RevTex, 1 fig., Reference for Dombeck proposal adde

A Study on Conical Rocket Stabilization

The objective was to develop a finless model rocket . The idea evolved after seeing the Army\u27s Sprint anti-ballistic missile, which is conical in shape and does not have fins for primary aerodynamic stabilization . In designing the model rocket, a scale drawing was made, and center of gravity (CG) and center of pressure (CP) computations transferred to it. The initial design proved unstable because the CG and CP were too close together. Another drawing was made with the addition of a payload section to carry necessary weight to allow moving the CG forward. This second design was mathematically stable. For stability testing, a string was attached to the rocket\u27s CG and spun in a circular path. Stability was achieved when all counterclockwise torques equaled all clockwise torques (not measured). An engine was selected by weight-carrying ability. The rocket was flown using conventional techniques, and flight characteristics were collected. Movies were made for further reference, and the rocket proved stable

Parasitylenchus nearcticus sp.n. (Tylenchida : Allontonematidae) parasitizing Drosophila (Diptera : Drosophilidae) in North America

#Parasitylenchus nearticus sp. n. (#Tylenchida : #Allantonematidae) est décrit comme parasite de #Drosophila recens (#Diptera : #Drosophilidae) récolté dans les Adirondacks Moutains, Etat de New York, Etats-Unis d'Amérique. Cette nouvelle espèce est comparée à la seule espèce connue - en Grande-Bretagne - du genre #Parasitylenchus, et une clé des #Allantonematidae parasites de #Drosophilidae est présentée. Les femelles des deux générations parasites montrent un dimorphisme dans la forme du stylet et des glandes pharyngiennes. #P. nearcticus sp. n. stérilise les femelles de #D. recens$, ayant ainsi un impact sur l'écologie des populations de son hôte. (Résumé d'auteur

THEMIS Observations of the Magnetopause Electron Diffusion Region: Large Amplitude Waves and Heated Electrons

We present the first observations of large amplitude waves in a well-defined electron diffusion region at the sub-solar magnetopause using data from one THEMIS satellite. These waves identified as whistler mode waves, electrostatic solitary waves, lower hybrid waves and electrostatic electron cyclotron waves, are observed in the same 12-sec waveform capture and in association with signatures of active magnetic reconnection. The large amplitude waves in the electron diffusion region are coincident with abrupt increases in electron parallel temperature suggesting strong wave heating. The whistler mode waves which are at the electron scale and enable us to probe electron dynamics in the diffusion region were analyzed in detail. The energetic electrons (~30 keV) within the electron diffusion region have anisotropic distributions with T_{e\perp}/T_{e\parallel}>1 that may provide the free energy for the whistler mode waves. The energetic anisotropic electrons may be produced during the reconnection process. The whistler mode waves propagate away from the center of the 'X-line' along magnetic field lines, suggesting that the electron diffusion region is a possible source region of the whistler mode waves