HATCHLING SEX RATIOS AND LOCOMOTOR PERFORMANCE OF MIDLAND PAINTED TURTLES (CHRYSEMYS PICTA MARGINATA)

The primary objectives of this study were to understand how canopy cover and nest temperatures affect hatchling sex ratios and locomotor performance (i.e., swimming sprint speed and righting response) of Chrysemys picta marginata nests. Seventeen nests were monitored with temperature data-loggers during the 2009 nesting season and found to contain 100% male-biased clutches with a mean nest temperature range of 20.0–24.0°C during the thermosensitive period (TSP). The percentage of canopy cover over each nest was inversely and significantly correlated with mean nest temperatures experienced during the TSP. Mean nest temperatures (MNT) did not have a statistical effect on either measure of locomotor performance; however, there was an observed trend toward increased performance with increased MNT

Vigorous star formation in a bulge-dominated ERO at z = 1.34

We present near-IR spectroscopy of three Extremely Red Objects (EROs) using the OHS/CISCO spectrograph at Subaru telescope. One target exhibits a strong emission line which we identify as H-alpha at z = 1.34. Using new and existing ground-based optical and near-IR imaging, and archival HST imaging, we argue that this target is essentially an elliptical galaxy, with an old stellar population of around 4E11 solar masses, but having a dust-enshrouded star-forming component with a SFR of some 50--100 solar masses per yr. There is no evidence that the galaxy contains an AGN. Analysis of a further two targets, which do not exhibit any features in our near-IR spectra, suggests that one is a quiescent galaxy in the redshift range 1.2 < z < 1.6, but that the other cannot be conclusively categorised as either star-forming or quiescent. Even though our first target has many of the properties of an old elliptical, the ongoing star formation means that it cannot have formed_all_ of its stellar population at high redshift. While we cannot infer any robust values for the star formation rate in ellipticals at z > 1 from this one object, we argue that the presence of an object with such a high SFR in such a small sample suggests that a non-negligible fraction of the elliptical galaxy population may have formed a component of their stellar population at redshifts z ~ 1--2. We suggest that this is evidence for ongoing star formation in the history of elliptical galaxies.Comment: Accepted by MNRAS 1 April 2005. Ten pages, six figure

Edge-ground hatchets on the Southern Curtis Coast, Central Queensland: A preliminary Assessment of Technology, Chronology and Provenance

A number of edge-ground hatchets were identified from various locations in central Queensland during recent investigations conducted as part of the Gooreng Gooreng Cultural Heritage Project. Macroscopic examination suggested that some hatchets were manufactured on a distinctive form of rhyolitic tuff which is restricted in occurrence to the Town of Seventeen Seventy - Agnes Water area on the southern Curtis Coast. The hatchets are distributed over an area of some 6000 km2, centred on the town of Lowmead within the ethnohistorically documented linguistic borders of Gooreng Gooreng country. Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) was employed in an attempt to provenance the hatchets to particular outcrops of rhyolitic tuff on the basis of trace element geochemistry. Preliminary results confirm that all hatchets identified as rhyolitic tuff exhibit a similar geochemical signature. Moreover, this geochemistry can be correlated with the background samples from the Ironbark Site Complex, the only major rhyolite quarry known in the region. The study enhances our understanding of past Aboriginal lifeways in the region by situating strategies of stone procurement and use in the landscape

Teaching Foundational Aquatic Skills to Children in Open Water Environments

Learning to swim in a swimming pool might not prepare water competence sufficiently for different aquatic environments. The aim of this study was to assess the effectiveness of teaching children water safety knowledge and skills in open water environments (i.e., harbor, river, and surf). The aquatic knowledge and skills of 98 children (7-11 years old) were tested in a swimming pool before, immediately after, and three months after receiving a three-day intensive education program. At pre-test, typically fewer than 50% of children achieved a high level of water safety competence. After the program, competency in each of the six tasks assessed had increased with up to 80% of participants completing the tasks unassisted. Three-month retention of these skills was generally high (i.e., competency levels were either maintained or improved). A key challenge for future research will be to untangle the influences of maturation, order effects, and the open water education

Personal Inner Values – A Key to Effective Face-to-Face Business Communication

Effective face-to-face oral communication is crucial for organizational performance. Managers must communicate effectively with their subordinates, their peers and superiors to link organizational direction to those at all levels of the organization. In addition, face-to-face oral communications are fundamental to the messaging process between business entities, whether a person is acting for oneself or representing his/her company. Face-to-face oral communication that builds empathic trust and mutual confidence is essential in business, especially in light of the recent “crisis in trust” caused by the 2008 financial market “meltdown” and the widely publicized ethical failures in business that have occurred in the past decade. This need is now being successfully addressed and taught to business executives using the neuro-scientifically based technique of compassionate communication, in which two or more people speak slowly and briefly as they remain in a deep state of relaxation and nonjudgmental attentiveness. The twelve components of compassionate communication are reviewed along with the supporting research of earlier studies, with emphasis on a unique inner values exercise that appears to be a key to its successful use in business situations

Physiologic and hematologic concerns of rotary blood pumps: what needs to be improved?

Over the past few decades, advances in ventricular assist device (VAD) technology have provided a promising therapeutic strategy to treat heart failure patients. Despite the improved performance and encouraging clinical outcomes of the new generation of VADs based on rotary blood pumps (RBPs), their physiologic and hematologic effects are controversial. Currently, clinically available RBPs run at constant speed, which results in limited control over cardiac workload and introduces blood flow with reduced pulsatility into the circulation. In this review, we first provide an update on the new challenges of mechanical circulatory support using rotary pumps including blood trauma, increased non-surgical bleeding rate, limited cardiac unloading, vascular malformations, end-organ function, and aortic valve insufficiency. Since the non-physiologic flow characteristic of these devices is one of the main subjects of scientific debate in the literature, we next emphasize the latest research regarding the development of a pulsatile RBP. Finally, we offer an outlook for future research in the field

Optimal-transport-based mesh adaptivity on the plane and sphere using finite elements

In moving mesh methods, the underlying mesh is dynamically adapted without changing the connectivity of the mesh. We specifically consider the generation of meshes which are adapted to a scalar monitor function through equidistribution. Together with an optimal transport condition, this leads to a Monge-Amp\`ere equation for a scalar mesh potential. We adapt an existing finite element scheme for the standard Monge-Amp\`ere equation to this mesh generation problem; this is a mixed finite element scheme, in which an extra discrete variable is introduced to represent the Hessian matrix of second derivatives. The problem we consider has additional nonlinearities over the basic Monge-Amp\`ere equation due to the implicit dependence of the monitor function on the resulting mesh. We also derive the equivalent Monge-Amp\`ere-like equation for generating meshes on the sphere. The finite element scheme is extended to the sphere, and we provide numerical examples. All numerical experiments are performed using the open-source finite element framework Firedrake.Comment: Updated following reviews, 36 page