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A thyroid imaging reporting and data system was created for risk stratification of thyroid nodules according to qualitative nonenhanced and contrast-enhanced US features.

Efficient and low-cost recovery of metals from pyrolusite and Chromite Ore Processing Residue (COPR) is of great significance for environmental protection and sustainable development of metal resources. This study proposes a new method for the simultaneous recovery of Cr and Mn from COPR and pyrolusite, to realize COPR and pyrolusite resource utilization and detoxification. Under the optimal conditions (i.e., the temperature of 150 ℃, the holding time of 1.5 h, the H2SO4concentration of 3 M, the mass ratio of COPR to pyrolusite of 1:1, and the solid-liquid ratio of 1:20), the leaching efficiency of Cr and Mn reached 99.56% and 85.34% respectively. The Toxicity Characteristic Leaching Procedure (TCLP) total Cr concentration of the detoxified slag was 0.26 mg/L meeting the EPA standard (＜5 mg/L). The reaction mechanism was elucidated based on thermodynamics, kinetics, and mineral characterization. In addition, a high-quality utilization strategy was proposed, leaching solution to prepare manganese carbonate and sodium chromate, and the detoxified slag can be used for steel smelting. In brief, this method has good economic benefits and provides a new reference for the resource utilization of hazardous waste.

The inertial force due to the acceleration of a locomotion interface is identified as a difference between virtual and real-world locomotion. To counter the inertial force, inertial-force feedback was implemented for the Treadport, a locomotion interface. A force controller was designed for a mechanical tether to apply the feedback force to the user. For the case of the user accelerating forward from rest, psychophysical ex periments showed that subjects preferred inertial-force feedback to a spring-feedback force proportional to position or to position control, where the force feedback maintained a force of zero on the subject.