Learn More
A mathematical model for studying the passive kinematics of total knee prostheses can be useful in computer-aided planning and guidance of total joint replacement. If the insertion location and neutral length of knee ligaments is known, the passive kinematics of the knee can be calculated by minimizing the strain energy stored in the ligaments at any(More)
A decision-directed (DD) channel estimation based on iterative linear minimum mean square error (LMMSE) is proposed for orthogonal frequency division multiplexing systems. Existing DD channel estimation is well known to have the problem of error propagation because of symbol-by-symbol detection. The proposed algorithm can estimate the correction term of(More)
The development of quantitative measures to evaluate software development techniques is necessary if we are going to develop appropriate methodologies for software production. Data is collected by the Software Engineering Laboratory at NASA Goddard Space Flight Center on developing medium scale projects of up to ten man years effort. In this study, cluster(More)
The title compound, C(19)H(21)N(3)O(3)S, was synthesized via an aza-Wittig reaction of a functionalized imino-phospho-rane with phenyl isocyanate under mild conditions. In the mol-ecule, the fused thienopyrimidine ring system makes a dihedral angle of 66.30 (11)° with the phenyl ring. An intra-molecular C-H⋯O hydrogen bond occurs. The terminal -OCH(2)CH(3)(More)
OBJECTIVE To understand the influence of different sleep stages on respiratory regulation in normal people. METHODS We measured ventilation (VE) and occlusion pressure (P0.1) responses to hyperoxia hypercapnia (deltaVE/deltaPaCO2, deltaP0.1/deltaPaCO2) and isocapnic hypoxia (deltaVE/deltaSaO2 and deltaP0.1/deltaSaO2) in eleven non-snoring healthy people(More)
Process variations - which affect critical electrical parameters and lead to both random and systematic changes in circuit performance - have always posed significant challenges to semiconductor design. In the past, within-die process variation was relatively small, and methods such as corner-based analysis were sufficient. This allowed timing analysis(More)
A mathematical model for studying the passive kinematics of condylar-type total knee prostheses can be useful in planning and performing total joint replacement. If the insertion location and neutral length of knee ligaments is known, the passive kinematics of the knee can be calculated by minimizing the strain energy stored in the ligaments in any angular(More)
  • 1