2,654 research outputs found
Slowing light through Zeeman Coherence Oscillations in a duplicated two-level system
We present the theory of a new method to slow a linearly polarized probe
pulse as it propagates through a duplicated two-level system driven by an
orthogonally polarized control field. The method makes use of Zeeman coherence
oscillations (CZO) that arise in the atomic system because of the spatial and
temporal modulation of the total polarization. This method exhibits properties
similar to those that rely on the electromagnetically induced transparency
(EIT) but without the existence of any trapping state. We demonstrated also the
propagation of a dark polariton in the mediumComment: Rapid communication in PRA, 4 pages, 3 figures. Phys Rev A, rapid
com. accepted (2008
Homogeneous Gold Catalysis through Relativistic Effects: Addition of Water to Propyne
In the catalytic addition of water to propyne the Au(III) catalyst is not
stable under non-relativistic conditions and dissociates into a Au(I) compound
and Cl2. This implies that one link in the chain of events in the catalytic
cycle is broken and relativity may well be seen as the reason why Au(III)
compounds are effective catalysts.Comment: 12 pages, 3 figures, 1 tabl
Older adults and the unique role of the radiation therapist: Future directions for improving geriatric oncology training and education.
There is widespread recognition that the provision of high quality, appropriate and equitable care to older adults with cancer is a growing challenge in oncology practice. Radiation therapy (RT) is an effective and localised treatment that represents an attractive curative or palliative option for many older adults, and radiation therapists (RTT) play an important role in the delivery, support and quality of care for people during RT. The need to develop an evidence-based, global approach to improving all radiation oncology (RO) professionals' knowledge and clinical practice in geriatric oncology (GO) has been previously identified. This article specifically focusses on the status quo of GO clinical practice and education for RTT worldwide. We explore the unique clinical role that RTT play in the management of older adults with cancer and define multiple clinical care points in which RTT could potentially participate in geriatric screening, geriatric assessment and intervention to optimise the care of older adults, with a focus on dementia. Directions for future efforts to improve the knowledge and clinical skills of RTT in caring for older adults are discussed
Accurate heat loss evaluation of water-cooled electric motors using a differential ultrasonic calorimeter
Measuring thermal losses of electric motors are important for their design optimization and correct pricing after manufacture. This measurement can be conducted by measuring the temperature difference of the motor coolant (commonly water) between the coolant's inlet and outlet. High speed of measurement facilitates testing various load scenarios and manufacture throughput; high measurement accuracy and resolution enables correct conclusions on efficiency of various design alterations and price bracketing of manufactured pieces.
Ultrasonic temperature sensors can fast sense temperature with high resolution and accuracy across the complete ultrasonic pathway. Conventional high resolution ultrasonic sensors are expensive; however, oscillating ultrasonic temperature sensors can be implemented using mass produced transducers and electronic parts which cost a fraction of the price of conventional high resolution ultrasonic measurement equipment.
The presented ongoing research focuses on development of a differential ultrasonic oscillating temperature sensor for evaluation of power losses in electrical motors. Computer simulations, electronic and firmware design, and experimental results are presented and discussed
Identification and management of atypical Hemolytic Uremic Syndrome immediately post heart transplantation
Atypical hemolytic uremic syndrome (aHUS) is a serious hematologic disorder with high mortality if left untreated. A comprehensive literature review revealed only two cases of aHUS post–heart transplantation. In both cases the disease developed after induction of calcineurin inhibitor therapy. We report a case of immediate post–heart transplantation aHUS, manifested before the induction of, and therefore not associated with, calcineurin inhibitor
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