Disrupting the Obligation of Objective Knowledge in Dance Science Research

Background: Through pressure from funding and governing bodies, an audit culture invades the rhetoric of the dance medicine and science research community, leading to undue focus on justifying and legitimizing the holistic benefits of dancing. This paper critiques this hierarchical value system which disproportionately favors objective, generalizable, and quantitative research approaches still dominant in dance medicine and science, existing since the founding of the International Association for Dance Medicine and Science (IADMS) in 1990. Purpose: Whilst this may mean studies are generalizable when applied to broader contexts, objective outcomes lack granularity and do not automatically lead to appropriate, meaningful, inclusive, or accessible dance experiences for everyone. Subjective, idiographic, ethnographic, embodied, phenomenological, and transdisciplinary approaches to dance medicine and science research have great potential to broaden, deepen, and enrich the field. Conclusions: This paper highlights the tensions between qualitative and quantitative methodologies, advocating that researchers can rigorously embrace their positionality to contribute toward ontological and epistemological clarity with any researcher bias, assumption, or expectation transparently disclosed. The writing draws on research examples from Dance for Health (DfH) as a part of dance science and medicine field of study, including but not limited to Dance for Parkinson’s. This paper provides resourceful recommendations, encouraging researchers to remain imaginative and curious through application of arts-based, person-centered, collaborative mixed methods within their own studies

Effects of a ballet intervention on trunk coordination and range of motion during gait in people with Parkinson’s

Background: People with Parkinson’s often move the trunk in a more in-phase pattern with reduced range of motion. No studies to date have assessed changes to trunk coordination after a dance intervention. The present study aimed to determine the effect of weekly ballet classes on trunk coordination and range of motion during gait for people with Parkinson’s. Methods: The study follows a non-randomized, controlled project evaluation design. Two inertial sensors were used to record angular displacement of the pelvis and thorax during a 10 m walk for 19 experimental participants and 13 control participants. Coordination was assessed using cross-correlation of the angular displacement of the two body regions. Results: No significant changes in trunk coordination and range of motion were found across time for both dancing and control groups (p > 0.01). There were also no significant differences between groups on all measures at different time intervals (p > 0.01). Conclusions: The present study did not demonstrate significant effects of a weekly ballet class on trunk coordination and range of motion during gait for people with Parkinson’s. There is a need to determine optimal dance class frequency and appropriate levels of overload to allow for potential physiological improvements

Estimating river flows across basins using water isotopes

Global warming is expected to dramatically alter the timing and quantity of water within the nation’s river systems; however, these impacts will be heterogeneous both within river basins and across regions. A detailed understanding of the spatial and temporal dynamics of water sources across river networks is therefore central to managing the impacts of climate change. Stable isotopes of water (2H:1H & 18O:16O) provide an emerging method for elucidating the contributions of varying water sources to rivers. Because the stable isotope composition of precipitation varies geographically, variation in the stable isotope composition of river water indicates the volume-weighted integration of source water within the watershed. During September 2017, we collected stable isotope samples across five river networks in the Pacific Northwest and SE Alaska that span a range of hydraulic and climatic conditions: the Snoqualmie, Green, Wenatchee, and Skagit Rivers as well as Cowee Creek. For each basin we regressed isotope values against computed spatial covariates such as elevation, mean annual precipitation, and geology to determine which covariates explained the greatest proportion of isotopic variation. We compared best-fit models for each basin to examine how major correlates of isotopic variation differed among river networks. Results indicate that rivers on the west side of the Cascades display a far stronger relationship to elevation than the Wenatchee. We then built spatial stream network models to display and communicate spatial patterns of isotopic variation within the Snoqualmie and Wenatchee basins. We also employed a mixing-model approach to determine where sources of water in the mainstems of each river originated (e.g. snow zone, rain-on-snow zone, or rain) during summer low flow conditions. Our results can be used by managers and watershed groups to estimate how river flows may shift in a changing climate

What motivates senior clinicians to teach medical students?

BACKGROUND: This study was designed to assess the motivations of senior medical clinicians to teach medical students. This understanding could improve the recruitment and retention of important clinical teachers. METHODS: The study group was 101 senior medical clinicians registered on a teaching list for a medical school teaching hospital (The Canberra Hospital, ACT, Australia). Their motivations to teach medical students were assessed applying Q methodology. RESULTS: Of the 75 participants, 18 (24%) were female and 57 (76%) were male. The age distribution was as follows: 30–40 years = 16 participants (21.3%), 41–55 years = 46 participants (61.3%) and >55 years = 13 participants (17.3%). Most participants (n = 48, 64%) were staff specialists and 27 (36%) were visiting medical officers. Half of the participants were internists (n = 39, 52%), 12 (16%) were surgeons, and 24 (32%) were other sub-specialists. Of the 26 senior clinicians that did not participate, two were women; 15 were visiting medical officers and 11 were staff specialists; 16 were internists, 9 were surgeons and there was one other sub-specialist. The majority of these non-participating clinicians fell in the 41–55 year age group. The participating clinicians were moderately homogenous in their responses. Factor analysis produced 4 factors: one summarising positive motivations for teaching and three capturing impediments for teaching. The main factors influencing motivation to teach medical students were intrinsic issues such as altruism, intellectual satisfaction, personal skills and truth seeking. The reasons for not teaching included no strong involvement in course design, a heavy clinical load or feeling it was a waste of time. CONCLUSION: This study provides some insights into factors that may be utilised in the design of teaching programs that meet teacher motivations and ultimately enhance the effectiveness of the medical teaching workforce

Flight of the Bumblebee: the Early Excess Flux of Type Ia Supernova 2023bee revealed by TESSTESS, SwiftSwift and Young Supernova Experiment Observations

We present high-cadence ultraviolet through near-infrared observations of the Type Ia supernova (SN Ia) 2023bee in NGC~2708 ($D = 32 \pm 3$ Mpc), finding excess flux in the first days after explosion relative to the expected power-law rise from an expanding fireball. This deviation from typical behavior for SNe Ia is particularly obvious in our 10-minute cadence $TESS$ light curve and $Swift$ UV data. Compared to a few other normal SNe Ia with detected early excess flux, the excess flux in SN 2023bee is redder in the UV and less luminous. We present optical spectra of SN 2023bee, including two spectra during the period where the flux excess is dominant. At this time, the spectra are similar to those of other SNe Ia but with weaker Si II, C II and Ca II absorption lines, perhaps because the excess flux creates a stronger continuum. We compare the data to several theoretical models that have been proposed to explain the early flux excess in SNe Ia. Interaction with either a nearby companion star or close-in circumstellar material is expected to produce a faster evolution than seen in the data. Radioactive material in the outer layers of the ejecta, either from a double detonation explosion or simply an explosion with a $^{56}$Ni clump near the surface, can not fully reproduce the evolution either, likely due to the sensitivity of early UV observable to the treatment of the outer part of ejecta in simulation. We conclude that no current model can adequately explain the full set of observations. We find that a relatively large fraction of nearby, bright SNe Ia with high-cadence observations have some amount of excess flux within a few days of explosion. Considering potential asymmetric emission, the physical cause of this excess flux may be ubiquitous in normal SNe Ia.Comment: 21 pages, 12 figures. Accepted by the astrophysical journa

SN 2022oqm: A Multi-peaked Calcium-rich Transient from a White Dwarf Binary Progenitor System

We present the photometric and spectroscopic evolution of SN 2022oqm, a nearby multi-peaked hydrogen- and helium-weak calcium-rich transient (CaRT). SN 2022oqm was detected 19.9 kpc from its host galaxy, the face-on spiral galaxy NGC 5875. Extensive spectroscopic coverage reveals a hot (T >= 40,000 K) continuum and carbon features observed ~1 day after discovery, SN Ic-like photospheric-phase spectra, and strong forbidden calcium emission starting 38 days after discovery. SN 2022oqm has a relatively high peak luminosity (MB = -17 mag) for CaRTs, making it an outlier in the population. We determine that three power sources are necessary to explain SN 2022oqm's light curve, with each power source corresponding to a distinct peak in its light curve. The first peak of the light curve is powered by an expanding blackbody with a power law luminosity, consistent with shock cooling by circumstellar material. Subsequent peaks are powered by a double radioactive decay model, consistent with two separate sources of photons diffusing through an optically thick ejecta. From the optical light curve, we derive an ejecta mass and 56Ni mass of ~0.89 solar masses and ~0.09 solar masses, respectively. Detailed spectroscopic modeling reveals ejecta that is dominated by intermediate-mass elements, with signs that Fe-peak elements have been well-mixed. We discuss several physical origins for SN 2022oqm and favor a white dwarf progenitor model. The inferred ejecta mass points to a surprisingly massive white dwarf, challenging models of CaRT progenitors.Comment: 33 pages, 17 figures, 5 tables, Submitted to Ap

Multi-messenger observations of a binary neutron star merger

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of ~1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg2 at a luminosity distance of 40+8-8 Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 Mo. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at ~40 Mpc) less than 11 hours after the merger by the One- Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ~10 days. Following early non-detections, X-ray and radio emission were discovered at the transient’s position ~9 and ~16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta