Therapeutic muds

Collaborative Networked Communication: MUDs as Systems Tools

A systems administration group is only as effective as its internal communication mechanisms. On-line communication has traditionally been managed via electronic mail or news, which are neither real-time nor truly collaborative. Communication tools which let multiple parties work together in real-time have become widespread on the Internet in the last several years. In an effort to keep a physi...

from MUDs as SPACE to as a MUD

Meandering worms: mechanics of undulatory burrowing in muds.

Recent work has shown that muddy sediments are elastic solids through which animals extend burrows by fracture, whereas non-cohesive granular sands fluidize around some burrowers. These different mechanical responses are reflected in the morphologies and behaviours of their respective inhabitants. However, Armandia brevis, a mud-burrowing opheliid polychaete, lacks an expansible anterior consis...

Burrowing in marine muds by crack propagation: kinematics and forces.

The polychaete Nereis virens burrows through muddy sediments by exerting dorsoventral forces against the walls of its tongue-depressor-shaped burrow to extend an oblate hemispheroidal crack. Stress is concentrated at the crack tip, which extends when the stress intensity factor (KI) exceeds the critical stress intensity factor (KIc). Relevant forces were measured in gelatin, an analog for elast...

Borehole Imaging Technology Visualizes Photorealistically in Oil-Based Muds

36 JPT • NOVEMBER 2014 To estimate reserves, optimize well recovery, and place future development wells more accurately, operators require increasingly detailed understanding of complex oil and gas reservoirs. Highresolution geological data from the borehole—core samples and wireline microresistivity images—are essential to fully characterize reservoir architecture, guide and constrain reservoi...