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This study was design to evaluate the potential of the recognition trials for the Logical Memory (LM), Visual Reproduction (VR), and Verbal Paired Associates (VPA) subtests of the Wechsler Memory Scales–Fourth Edition (WMS-IV) to serve as embedded performance validity tests (PVTs). The classification accuracy of the three WMS-IV subtests was computed against three different criterion PVTs in a sample of 103 adults with traumatic brain injury (TBI). The optimal cutoffs (LM ≤ 20, VR ≤ 3, VPA ≤ 36) produced good combinations of sensitivity (.33–.87) and specificity (.92–.98). An age-corrected scaled score of ≤5 on either of the free recall trials on the VPA was specific (.91–.92) and relatively sensitive (.48–.57) to psychometrically defined invalid performance. A VR I ≤ 5 or VR II ≤ 4 had comparable specificity, but lower sensitivity (.25–.42). There was no difference in failure rate as a function of TBI severity. In addition to LM, VR, and VPA can also function as embedded PVTs. Failing validity cutoffs on these subtests signals an increased risk of non-credible presentation and is robust to genuine neurocognitive impairment. However, they should not be used in isolation to determine the validity of an overall neurocognitive profile.

Replicate previous research on Logical Memory Recognition (LM: Performance validity was psychometrically operationalized in a mixed clinical sample of 213 adults. Classification of the LM: LM: Critical item analysis enhances the classification accuracy of the optimal LM

This study was designed to cross-validate the V-5, a quick psychiatric screener, across administration formats and levels of examinee acculturation. The V-5 was administered twice (once at the beginning and once at the end of the testing session) to three samples (N = 277) with varying levels of symptom severity and English language proficiency, varying type of administration, alongside traditional self-reported symptom inventories as criterion measures. The highest rest-retest reliability was observed on the Depression (.84) and Pain scales (.85). The V-5 was sensitive to the variability in symptom severity. Classification accuracy was driven by the base rate of the target construct, and was invariant across administration format (in-person or online) or level of English proficiency. The V-5 demonstrated promise as a cross-culturally robust screening instrument that is sensitive to change over time, lends itself to online administration, and is suitable for examinees with limited English proficiency.

High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually dated ice core record from the eastern Ross Sea, named the Roosevelt Island Climate Evolution (RICE) ice core. Comparison of this record with climate reanalysis data for the 1979–2012 interval shows that RICE reliably captures temperature and snow precipitation variability in the region. Trends over the past 2700 years in RICE are shown to be distinct from those in West Antarctica and the western Ross Sea captured by other ice cores. For most of this interval, the eastern Ross Sea was warming (or showing isotopic enrichment for other reasons), with increased snow accumulation and perhaps decreased sea ice concentration. However, West Antarctica cooled and the western Ross Sea showed no significant isotope temperature trend. This pattern here is referred to as the Ross Sea Dipole. Notably, during the Little Ice Age, West Antarctica and the western Ross Sea experienced colder than average temperatures, while the eastern Ross Sea underwent a period of warming or increased isotopic enrichment. From the 17th century onwards, this dipole relationship changed. All three regions show current warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea but increasing in the western Ross Sea. We interpret this pattern as reflecting an increase in sea ice in the eastern Ross Sea with perhaps the establishment of a modern Roosevelt Island polynya as a local moisture source for RICE.

Implementation of digital controllers in embedded environment suffers from the inherent problems associated with analog-digital signals interfacing in hard real-time, therefore, the control algorithms are invariantly subjected to approximations. This paper presents a novel technique for implementation of an efficient FPGA based digital Proportional-Integral-Derivative (PID) controller for the motion control of a permanent magnet DC motor. The implementation technique circumnavigates the problem of interfacing analog and digital systems in real-time. The controller is used in a speed control loop. The hardware implementation has been done on a Xilinx Spartan 3 FPGA chip. A novel technique has been adopted for the generation of the control input as a PWM signal for controlling the motor driver circuit and decoding the optical encoder data for using it for the speed feedback in the PID control loop. The VHDL algorithm for the proposed implementation has also been presented in this paper. A comparison of the experimental results with the Matlab® based simulation shows the effectiveness of the proposed method.

Although mini-tufts are considered generally to show the surface flow direction on windswept surfaces, there is some uncertainty about their correct interpretation, particularly as three-dimensional flows approach separation. This note provides some guidance on this controversial question, based on experience with mini-tufts on wings, fins and canards in the DRA 13 ft x 9 ft low speed wind-tunnel at Bedford.An illustration of the value of the technique is given. Mini-tuft photographs are used to identify the trailing edge condition which relates to the classification of the steady and fluctuation pressure distributions observed a swept wing with a conical, separated flow.

SummaryThis report describes a series of steady and time dependent pressure measurements on a half-model of a rectangular wing of aspect ratio 4. The wing was mounted on a halfbody attached to a sidewall of the RAE 8 ft x 8 ft windtunnel and the tests were made at Mach numbers of 0·60, 0·70 and 0·80 with fixed transition and a Reynolds number of about 2·4 x 106 at the highest Mach number. The wing was oscillated about its mid-chord axis at four frequencies giving frequency parameters up to 0·27 at M = 0·80. The static angle of incidence was varied from -10° to + 10°; here interest is centred on angles of incidence for which the flow on the upper surface of the wing is separated.Selected mean and oscillatory measurements are offered as a challenge to computational fluid dynamicists for this simple threedimensional configuration. The measurements are of particular interest because the transonic flows include both incipient and well developed separations.

The new requirement to test wind tunnel models of combat aircraft at high angles of incidence and high kinetic pressures has led to a review of the factors controlling the model stability. The review suggested that dangerous motions might occur (possibly without prior warning) on models at high angles of incidence unless special preventive measures were taken. An internal tuned damper and balance bump stops were recommended to limit the responses. The bump stops would also prevent the moment limits of the strain gauge balance from being exceeded. The effectiveness of both devices was confirmed by tests on a swept wing model which experienced dangerous bending oscillations in a vertical plane at a Mach number of 0.50 in the incidence range from about 27–29° together with dangerous yawing oscillations in a horizontal plane above an incidence of about 35°. Further research is recommended to ensure the safety of other models. For sting supported models in a conventional wind tunnel, it is shown by analysis that the structural damping in the sting bending mode needs to be about 4 to 6% critical damping. In a cryogenic wind tunnel corresponding levels would need to be 7 to 10% critical damping because of the possibility of increased negative aerodynamic damping relative to ambient conditions.

Component based software engineering (CBSE) is a new and emerging paradigm in software development, which, if performed correctly promises to deliver shorter development time and cost savings for the overall development process. The following research aims to evaluate the state of CBSE in metropolitan Jamaica in terms of financial gain and development time. The findings of the research can be used to inform and educate IT professionals, researchers and anyone who may be interested in the area of CBSE, of the many benefits associated with the paradigm. Further recommendations can also be made in an attempt to increase the amount of reuse presently practiced in software development companies in metropolitan Jamaica and consequently increase the productivity of the companies.

In Nursing Times of May 17, 1995, Clinical Reports covered the important subject of euthanasia. Three papers examined the case for and against euthanasia. They provided some helpful background history to the subject and clarified the position as it currently exists in the Netherlands. A fourth paper, while not addressing the subject of euthanasia directly, examined the issue of resuscitation and emphasised the important ethical principle of respect for autonomy. It is always wise to bear this principle in mind whenever practitioners in the health professions are considering what they perceive to be in the best interests of the patient. The papers were followed by a questionnaire which readers were invited to complete and return, thus enabling them to make a contribution to the debate on this important issue. The results have now been analysed and in this paper the author comments on the findings. In order to do so, he has considered the information in the original papers and urges readers to do the same.

The UKCC Code of Professional Conduct provides registered nurses, midwives and health visitors with an extended definition of the phrase 'professional accountability'. It emphasises the primacy of the interests of patients and clients. It is essential that the professions maintain a good standing and reputation in order that the trust and confidence of the public are maintained. 'As a registered nurse, midwife or health visitor, you are personally accountable for your practice...' Accountability is not an optional extra-you cannot choose to be accountable for some aspects of your practice but not others.

Have the 1990 NHS and community care reforms totally divorced the national health service from its founding principles? Is commercialism compatible with public service? In the following extracts from a paper presented at the HVA 1993 annual professional conference Reg Pyne, in a presentation of his personal views, highlights short-comings in the organisation and delivery of both health and social care since the reforms were introduced. He calls on nurses and their managers to stand by their professional principles to defend standards and equity in NHS services.

The use of sweep-frequency excitation for rapid measurement of time-dependent pressures on wind-tunnel models is examined. Results obtained from two different wind-tunnels covering the Mach number range from 0.2 to 0.85, and a wide range of flow conditions, are compared with measurements made using the slower, traditional method of discrete-frequency excitation. It is concluded that the sweep-frequency excitation method can reduce testing time in certain flow conditions with no significant loss in accuracy.

SummaryThis paper describes a series of steady and time-dependent pressure measurements on a half-model of a rectangular wing of aspect ratio 4. The wing was mounted on a half-body attached to a sidewall of the RAE 8 x 8 ft wind tunnel and the tests were made at Mach numbers of 0·20, 0·42, 0·70, 0·80 and 0·85 with fixed transition and a Reynolds number of about 2·5 x 106 at the highest Mach number. The wing was oscillated about its mid-chord axis at four frequencies giving frequency parameters up to 1·15 at M = 0·20 and 0·25 at M = 0·85. The static angle of incidence was varied from –10° to + 10°.Selected mean and oscillatory measurements are offered as a challenge to computational fluid dynamicists for this simple three-dimensional configuration. Comparisons are made with calculations by means of subsonic linearised theory and recent transonic small perturbation methods. The measurements are of particular interest at transonic speeds, where both attached and incipient separated flows are considered.

Two propelagic and nine pelagic larval stages of Squilla armata H. Milne Edwards, from New Zealand, are described and illustrated. A larval calendar showing monthly abundance and ratio of occurrence of pelagic larvae from the plankton in relation to the mean water temperature is given. Habits of the larvae are described.

Difficulties of compounding liquid rubbers are discussed and detailed descriptions are given of mixers for the adequate continuous dispersion of carbon black and of light-weight injection molding machines suitable for the pastes which result; some of the problems of injection molding are outlined and suggested solutions given. The reinforcement of liquid rubbers with textile fibers is discussed and suggestions proposed for the layout of a factory suitable for the processing of liquid rubbers.

Mixing and processing methods used in the rubber industry have been designed to use the only form of raw rubber hitherto available—that of a high molecular weight solid. But rubber in high molecular weight form is essential only in the finished product; in principle, similar final properties could be obtained from a low molecular weight raw material provided this could be chain extended before or during the final shaping and vulcanizing operation. This approach has been employed for some time in the rather specialized field of castable polyurethane rubber manufacture. Its exploitation for more general rubber manufacture has become more than just a theoretical possibility with the recent availability of “liquid rubbers” whose molecules have reactive end groups. Those available at present may well prove not fully acceptable, either economically or technically, but it is most unlikely that they represent the best that can be achieved. Material developments will be encouraged if means have been worked out for exploiting liquid rubbers' potential advantages (such as the ability to be processed on lighter and less powerful equipment), and the shortcomings of existing examples have been identified. These considerations led RAPRA to start a processing and compounding study—a decision which seems further justified by the very recent American announcements of development work on a tire manufacturing process using liquid rubber, and of full commerical scale production of several hydroxyl terminated liquid butadiene polymers. This report summarizes the study to date.

Semiconductor strain gauge pressure transducers, operating on the Wheatstone bridge principle, are widely used in wind/tunnel tests. However, a major disadvantage is their inherent sensitivity to variations of the model temperature. This is particularly serious when accurate steady measurements are required. A method is described by which the thermal stability of the transducer may be improved, using integrated circuit operational amplifiers.

The requirements of refractories in the copper industry may be classed as follows: 1Resistance to temperatures 2Resistance to chemical action 3Ability to withstand sudden temperature changes 4Minimum absorption of slag and metal 5Absence of manufacturing defects.

In a study of 194 reoperation in which one third of the cases were managed without drainage of SRF, it was found that a number of failures occurred after non-drainage. Analysis of these failures shows that more than half could have been avoided if the choice of operation had been correct. It is felt that with careful attention to the criteria which was used to decide on the choice of surgical technique, the results obtained by the non-drainage method should be as good in the more complicated case as they have already been shown to be in the primary case. Because the drainage of SRF carries with it a high risk of surgical complications and these complications frequently result in the development of MPR, management of the reoperation should be carried out without drainage of SRF whenever possible.

Numerous articles and papers have been published in previous years on system load forecasting. These forecasts are used primarily for scheduling generation and future system development. With the development and implementation of state estimation programs, the ability to forecast on a node or bus basis seemed feasible. This paper examines a method of forecasting bus loading using the data computed by a state estimator program. This forecast is used in conjunction with future scheduled outages in a power flow program to evaluate the security of the system.

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