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Dexterous manipulation with a highly redundant movement system is one of the hallmarks of human motor skills. From numerous behav-ioral studies, there is strong evidence that humans employ compliant task space control, i.e. they focus control only on task variables while keeping redundant degrees-of-freedom as compliant as possible. This strategy is robust(More)
Here we characterize the nutrient content in the outflow of the Green Lake 5 rock glacier, located in the Green Lakes Valley of the Colorado Front Range. Dissolved organic carbon (DOC) was present in all samples with a mean concentration of 0·85 mg L − − − − −1. A one-way analysis of variance test shows no statistical difference in DOC amounts among surface(More)
Understanding the principles of motor coordination with redundant degrees of freedom still remains a challenging problem, particularly for new research in highly redundant robots like humanoids. Even after more than a decade of research, task space control with redundacy resolution still remains an incompletely understood theoretical topic, and also lacks a(More)
A nonclassical 5-hydroxytryptamine (5-HT) receptor mediates the stimulation of adenylate cyclase activity in mouse embryo colliculi neurons in primary culture. The pharmacological profile characterized with agonists and antagonists suggests that this 5-HT receptor does not appear to correspond to a known 5-HT receptor. On this 5-HT receptor, 5-HT (EC50 =(More)
Recently, R. E. Udwadia (2003) suggested to derive tracking controllers for mechanical systems using a generalization of Gauss' principle of least constraint. This method allows us to reformulate control problems as a special class of optimal control. We take this line of reasoning one step further and demonstrate that well-known and also several novel(More)
Two putative anxiolytic drugs [ipsapirone (TVXQ 7821) and buspirone], structurally unrelated to benzodiazepines, have negligible ataxic and sedative side effects. These drugs are piperazine analogs which interact at 5-HT1 binding sites. It is demonstrated here that these drugs and two other piperazine derivatives, trifluoromethylphenylpiperazine (TFMPP) and(More)
M any electronic systems must be tuned through the variation of reactance of one or more circuit elements. In these applications it is often desirable to perform this tuning under electronic rather than manual control. Tuning varactor diodes, which are pn junction devices that act as voltage controlled variable capacitors, can perform this function, and are(More)
5-Hydroxytryptamine (5-HT) stimulates the accumulation of inositol-trisphosphate in WRK1 cells, a cell line originating from a rat mammary tumor. 5-HT acts via a single receptor type for which it has an affinity constant estimated to be 1.27 microM. A series of agonists known to act at 5-HT2 receptors are partial agonists in this system and have a rank(More)
Dexterous manipulation with a highly redundant movement system is one of the hallmarks of human motor skills. From numerous behav-ioral studies, there is strong evidence that humans employ compliant task space control, i.e. they focus control only on task variables while keeping redundant degrees-of-freedom as compliant as possible. This strategy is robust(More)