Triple band planar inverted F antennas for handheld devices

Two novel triple band planar inverted F antennas (PIFAs) are presented. The first antenna is realised by housing a dual frequency L-shaped spur line loaded PIFA element within the lower resonance PIFA element. The second antenna is realised by embedding two single element PIFAs within a quarter-wave patch. For both antennas, an isolation of better than -15 dB between the feed ports and a good agreement between simulation and measurement results was obtained     

"The Full Story by No Means All Told": Harry Stack Sullivan at Sheppard-Pratt, 1922-1930.

Harry Stack Sullivan (1892-1949) is well known for his interpersonal theory of mental illness, but little is known about how he actually worked as a clinician with patients. This article examines a pivotal time in Sullivan's career at Sheppard and Enoch Pratt Hospital in Baltimore from 1922 to 1930. Using clinical records as well as published writings, the article focuses on 2 crucial issues that are not fully addressed either in Sullivan's published writings or in past studies of him: first, his treatment as a gay psychiatrist of patients who he believed had homosexual orientations; second, the intellectual and institutional paradigm in psychiatry that influenced his practice. Finally, this article addresses the circumstances surrounding Sullivan's departure from Sheppard-Pratt, suggesting psychiatry's limited confrontation with the social stigmatization of homosexuality. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Surgery for unilateral coronal synostosis (plagiocephaly): unilateral or bilateral correction?

The treatment offered individuals of childhood sexual abuse is often unnecessarily long-term and is typically based upon the victimization/recovery model. This paper presents a brief case study illustrating the successful short-term cognitive-behavioral treatment of a 28-year-old woman with hypoactive sexual desire who reported a history of repeated sexual molestations throughout her childhood.     

Fire-retardant performance of some surface coatings for naval ship interior applications

The fire-retardant performances of various surface coatings for naval ship interior applications have been evaluated by a number of small-scale fire test methods. The coatings were eveluated as topcoats by cone calorimetry and limiting oxygen index methods and as primer/topcoat systems by radiat heating, direct flame impingement and reverse panel heating procedures. The coatings investigated were (1) a solvent-based epoxy polyester, (2) a solvent-based fireretardant alkyd,(3) a solvent-based chlorimated alkyd and (4) a water-based acrylic. In terms of the measured parameters, the chlorinated alkyd has superior fire properties while the epoxy polyserter, the fire-retardant alkyd and parameters, the chlorinated alkyd has superior fire properties while the epoxy polyester, the fire-retardant alkyd and the acrylic have significat disadvantages in relation to fire propagation. The relatively low amount of hydrogen chloride (～ 0.3%—mass per initial mass) evolved by the chlorinated alkyd during cone calorimetric combustion and its outstanding fire-retardant properties have resulted in it being considered acceptable for naval ship interior applications.     

Top-illuminated InGaAs/InP p-i-n photodiodes with a 3-dB bandwidthin excess of 26 GHz

Top-illuminated InGaAs p-i-n photodiodes have been fabricated from metal organic vapor-phase epitaxy (MOVPE) material, grown on semi-insulating InP substrates. A flat frequency response to 26 GHz has been measured, which is the highest figure yet reported for such devices. The predicted 3-dB bandwidth of these devices is 35 GHz     

A thermodynamic assessment of possible substrates for sulphate-reducing bacteria

A thermodynamic feasibility study was applied as a means of predicting suitable energy-yielding substrates for growth of sulphate-reducing microorganisms. The average free energy release per electron pair for a substrate-sulphate oxidoreduction may be more or less than the energy requirement for ATP synthesis from ADP and Pi. Substrates were divided into two groups on this thermodynamic basis and the division was shown to accord with previous experimental reports; those substrates which released an average of at least 8-4 kcal per electron pair (35-2 kJ per electron pair) were able to support growth whilst those releasing less than 8-4 kcal were unable to do so. It is proposed that the thermodynamic assessment could be applied to a wide range of possible substrates to predict the likelihood of their serving as sole substrates for growth of these organisms. The literature concerning the use of hydrocarbons by sulphate reducers is confused and indefinite, but inclines toward the idea that use of long-chain hydrocarbons by these organisms is possible. In contrast, however, thermodynamic analysis showed that the highest energy release is from the short-chain alkynes.     

Boundary resistance in SC composite wires and cryogenic stability

The measurement of transverse resistivity of NbTi composite wires has shown already the existence of a resistive barrier between SC filaments and the copper matrix. The electric and thermal resistances of this barrier are respectively much higher than those of copper matrix and this barrier is expected to have an influence on the cryogenic stability of composite wires. The transverse and longitudinal resistivities are measured for NbTi composite wires which were heat-treated at different temperatures from 300°C to 600°C. These measurements show that the barrier grows with the heat-treatment temperature. From the experimental results, the effect of the barrier on cryogenic stability is estimated to be negligibly small for the composite wire which is heat-treated under the normal condition. As for Nb₃Sn composite wires, two different structures of composite wires, each of which has a tantalum or niobium diffusion barrier, are studied and the same measurements as on NbTi composite wires are carried out. The results obtained indicate that the transverse resistivity depends appreciably on the structure of composite wires and that the larger transverse resistivity reduces not only the cryogenic stability, but also requires a larger transfer length at a current lead junction.