Personality and scholastic achievement

Based on the data of the "Basle Adolescents Study" 7 scales of the MMPI and the IQ according to Raven were compared with the average of grades. Teachers confirmed socially desirable personality traits with good grades and gave lower grades to pupils with a less desirable personality.     

Globally consistent event ordering in one-directional distributedenvironments

We consider communication structures for event ordering algorithms in distributed environments where information flows only in one direction. Example applications are multilevel security and hierarchically decomposed databases. Although the most general one directional communication structure is a partial order, partial orders do not enjoy the property of being consistently ordered, a formalization of the notion that local ordering decisions are ensured to be globally consistent. Our main result is that the crown free property is necessary and sufficient for a communication structure to be consistently ordered. We discuss the computational complexity of detecting crowns and sketch typical applications     

h‐Adaptive FE methods applied to single‐ and multiphase problems

A major problem in using the finite element method for solving numerous engineering problems in the framework of single‐ and multiphase materials is the assessment of discretization errors and the design of suitable meshes. To overcome this problem, adaptive finite element methods have been developed. Based on the error indicator by Zienkiewicz and Zhu, it is the goal of the present paper to present a new error indicator which is especially designed for multiphase problems. Furthermore, efficient h‐adaptive strategies concerning both the generation of new meshes in the framework of independent and hierarchical remeshing strategies and the data transfer between old and new meshes are pointed out. Finally, numerical examples are given to exhibit the efficiency and the quality of the presented h‐adaptive methods and to compare the different strategies to each other. Copyright © 2002 John Wiley & Sons, Ltd.     

Dual-frequency dual circularly-polarised patch antenna with wide beamwidth

A dual-frequency dual-circularly polarised patch antenna with wide beamwidth is proposed. The two-layer structure comprises circular patches with offset circular slots connected to rectangular slots. They provide orthogonal perturbations realising RHCP and LHCP for the lower and upper bands, respectively. The wide beamwidth is realised by extending the substrate beyond the groundplane. Measurements show a maximum beamwidth of 180deg and gains of 3.9 and 0.5 dBic for zenith and 10deg elevation, respectively, for the upper band. The measured beamwidth for the low band is 130deg with a maximum gain of 3.9 and -0.7 dBic for zenith and 10deg elevation, respectively. The axial-ratio is less than 3 dB in the hemisphere for elevations greater than 10deg for both bands.     

Planar antennas

This article reviews the state of the art in broadband antennas for emerging UWB applications and addresses the important issues of the broadband antenna design for UWB applications. First, a variety of planar monopoles with finite ground planes are reviewed. Next, the roll antennas with enhanced radiation performance are outlined. After that, the planar antennas printed on PCBs are described. A directional antipodal Vivaldi antenna is also presented for UWB applications. Last, a UWB antenna for wearable applications is exemplified     

Cor triatriatum dexter of an adult

Cor triatriatum dexter is a rare congenital malformation in which a membrane divides the right atrium into two chambers. The membrane represents a persistence of the right sinus venosus valve (RSV). Normally the RSV regresses between the 9th and 15th week of gestation, as the cephalic portion forms the crista terminalis and the caudal portion develops into the Eustachian and Thebesian valve. Any failure in the regression process may result in remnants of RSV as a simple muscle bar, a Chiari-network or a fenestrated or unfenestrated membrane (cor triatriatum dexter). We describe a patient with cor triatriatum dexter in whom diagnosis was made several years after successful valvulotomy procedure for severe congenital valvular pulmonary stenosis.     

A TQR-iteration based adaptive SVD for real time angle andfrequency tracking

The transposed VR (TQR) iteration is a square root version of the symmetric QR iteration. The TQR algorithm converges directly to the singular value decomposition (SVD) of a matrix and was originally derived to provide a means to identify and reduce the effects of outliers for robust SVD computation. The paper extends the TQR algorithm to incorporate complex data and weighted norms, formulates a TQR-iteration based adaptive SVD algorithm, develops a real time systolic architecture, and analyzes performance. The applications of high resolution angle and frequency tracking are developed and the updating scheme is so tailored. A deflation mechanism reduces both the computational complexity of the algorithm and the hardware complexity of the systolic architecture, making the method ideal for real time applications. Simulation results demonstrate the performance of the method and compare it to existing SVD tracking schemes. The results show that the method is exceptional in terms of performance to cost ratio and systolic implementation