S-wave and p-wave scattering in a cold gas of Na and Rb atoms

Using improved experimentally based $X{}^1\Sigma^+$ and $a{}^3\Sigma^+$ molecular potentials of NaRb, we apply the variable phase method to compute new data for low energy scattering of $^{23}$Na atoms by $^{85}$Rb atoms and $^{87}$Rb atoms. These are the scattering lengths and volumes, numbers of bound states and effective ranges, which we use to obtain the low energy spin-change cross section as functions of the system temperature and the isotope masses. From an analysis of the contributions of s-wave and p-wave scatterings to the elastic cross section we estimate temperatures below which only s-wave scattering is dominant. We compare our quantal results to data obtained from the semiclassical approximation. We supply evidence for the existence of a near zero energy p-wave bound state supported by the singlet molecular potential.Comment: The article contains additional material and data (see abstract

In situ observations of trophic behaviour and locomotion of Princaxelia amphipods (Crustacea, Pardaliscidae) at hadal depths in four West Pacific Trenches

Peer reviewedPublisher PD

Calibration of the TWIST high-precision drift chambers

A method for the precise measurement of drift times for the high-precision drift chambers used in the TWIST detector is described. It is based on the iterative correction of the space-time relationships by the time residuals of the track fit, resulting in a measurement of the effective drift times. The corrected drift time maps are parametrised individually for each chamber using spline functions. Biases introduced by the reconstruction itself are taken into account as well, making it necessary to apply the procedure to both data and simulation. The described calibration is shown to improve the reconstruction performance and to extend significantly the physics reach of the experiment.Comment: 8 pages, 5 figure

Alien Registration- Jamieson, Harold J. (Presque Isle, Aroostook County)

https://digitalmaine.com/alien_docs/33722/thumbnail.jp

Legal Transplants: Word-Building and Word-Borrowing in Slavic and South Pacific Legal Discourse

The Slavic and South Pacific languages and legal systems are geographically distant from each other. However this paper argues that similar equivocally progressive or regressive changes operate in each with critical, and often controversial, consequences for lawyers, linguists and all others engaged in communicative enterprise. This article explores those issues and concludes with proposing a six-point model for the successful working of legal transplants

THE MANDALA: FIRST-YEAR UNDERGRADUATE NURSING STUDENTS’ LEARNING EXPERIENCES

The mandala is a circular art form used by psychologists to access subconscious thought through symbolism and it has recently been adopted by nurse educators as a learning strategy for self awareness. However it has yet to be examined for this use in nursing education using rigorous research methodologies. The lived experiences of six first year undergraduate nursing students who completed a mandala assignment for emotional learning were explored using hermeneutic phenomenology. Participants experiences diverged from their original expectations that the mandala assignment would allow for a fun and free expression of ‘self. Instead their experiences resembled those associated with socialization in nursing education. Participants described both self-reflection and critical-reflection while completing the mandala assignment. Nurse educators and researchers can gain insight regarding the use of this assignment as an integrated transformative learning approach for emotional learning

Financial signal processing: a self calibrating model

Previous work on multifactor term structure models has proposed that the short rate process is a function of some unobserved diffusion process. We consider a model in which the short rate process is a function of a Markov chain which represents the 'state of the world'. This enables us to obtain explicit expressions for the prices of zero-coupon bonds and other securities. Discretizing our model allows the use of signal processing techniques from Hidden Markov Models. This means we can estimate not only the unobserved Markov chain but also the parameters of the model, so the model is self-calibrating. The estimation procedure is tested on a selection of U.S. Treasury bills and bonds.Bonds

Potential markets for a satellite-based mobile communications system

The objective of the study was to define the market needs for improved land mobile communications systems. Within the context of this objective, the following goals were set: (1) characterize the present mobile communications industry; (2) determine the market for an improved system for mobile communications; and (3) define the system requirements as seen from the potential customer's viewpoint. The scope of the study was defined by the following parameters: (1) markets were confined to U.S. and Canada; (2) range of operation generally exceeded 20 miles, but this was not restrictive; (3) the classes of potential users considered included all private sector users, and non-military public sector users; (4) the time span examined was 1975 to 1985; and (5) highly localized users were generally excluded - e.g., taxicabs, and local paging