The elegant results for strong duality and strict complementarity for linear programming, LP , can fail for cone programming over nonpolyhedral cones. One can have: unattained optimal values; nonzero duality gaps; and no primal-dual optimal pair that satisfies strict complementarity. This failure is tied to the nonclosure of sums of nonpolyhedral closed cones. We take a fresh look at known and ...

patent vessels. 3. The authors state that the infra-popliteal region evaluation was not included in their study. The importance of assessing distal run-off in arterial occlusive disease is crucial for prognostic purposes in addition to strategic planning of revascularization procedures. Although the most difficult portion of a Doppler evaluation, it needs to be performed with great patience, al...

This study describes criteria used by graduate nurse anesthesia educational programs (GNAEPs) in selecting students for admission. The investigators prepared and distributed a 15-item questionnaire to 71 GNAEPs as listed by the Council on Accreditation of Nurse Anesthesia Eduational Programs for December 1992. Thirty-eight of 71 (54%) of GNAEPs participated in this study. Upon examination of st...

The UK vocational assessment landscape is changing and research has a key role in helping to identify trends and anticipate emerging issues and challenges. This review collates the messages from recently published research about specific issues that have been found to affect the measurement of vocational learning. It also highlights issues that have been found to influence learner access to voc...

Abstract In this paper we consider an impulsive extension of optimal control problem with unbounded controls, subject to endpoint and state constraints. We show that the existence extended-sense minimizer is a normal extremal for constrained Maximum Principle ensures there no gap between infima original its extension. Furthermore, translate such relation into verifiable sufficient conditions no...