An interesting aspect of complex plasma is its ability to self-organize into a variety of structural configurations and undergo transitions between these states. A striking phenomenon is the isotropic-to-string transition observed in electrorheological complex plasma under the influence of a symmetric ion wake field. Such transitions have been investigated using the Plasma Kristall-4 (PK-4) microgravity laboratory on the International Space Station. Recent experiments and numerical simulations have shown that, under PK-4-relevant discharge conditions, the seemingly homogeneous direct current discharge column is highly inhomogeneous, with large axial electric field oscillations associated with ionization waves occurring on microsecond time scales. A multi-scale numerical model of the dust–plasma interactions is employed to investigate the role of the electric field in the charge of individual dust grains, the ion wake field and the order of string-like structures. Results are compared with those for dust strings formed in similar conditions in the PK-4 experiment.

Agitation is a common complication of Alzheimer’s dementia (Agit-AD) associated with substantial morbidity, high healthcare service utilization, and adverse emotional and physical impact on care partners. There are currently no FDA-approved pharmacological treatments for Agit-AD. We present the study design and baseline data for an ongoing multisite, three-week, double-blind, placebo-controlled, randomized clinical trial of dronabinol (synthetic tetrahydrocannabinol [THC]), titrated to a dose of 10 mg daily, in 80 participants to examine the safety and efficacy of dronabinol as an adjunctive treatment for Agit-AD. Preliminary findings for 44 participants enrolled thus far show a predominately female, white sample with advanced cognitive impairment (Mini Mental Status Examination mean 7.8) and agitation (Neuropsychiatric Inventory-Clinician Agitation subscale mean 14.1). Adjustments to study design in light of the COVID-19 pandemic are described. Findings from this study will provide guidance for the clinical utility of dronabinol for Agit-AD. ClinicalTrials.gov Identifier: NCT02792257.

The excitation of low frequency dust acoustic (or dust density) waves in a dusty plasma can be driven by the flow of ions relative to dust. We consider the nonlinear development of the ion–dust streaming instability in a highly collisional plasma, where the ion and dust collision frequencies are a significant fraction of their corresponding plasma frequencies. This collisional parameter regime may be relevant to dusty plasma experiments under microgravity or ground-based conditions with high gas pressure. One-dimensional particle-in-cell simulations are presented, which take into account collisions of ions and dust with neutrals, and a background electric field that drives the ion flow. Ion flow speeds of the order of a few times thermal are considered. Waveforms of the dust density are found to have broad troughs and sharp crests in the nonlinear phase. The results are compared with the nonlinear development of the ion–dust streaming instability in a plasma with low collisionality.

Successful management of an event where health-care needs exceed regional health-care capacity requires coordinated strategies for scarce resource allocation. Publications for rapid development, training, and coordination of regional hospital triage teams to manage the allocation of scarce resources during coronavirus disease 2019 (COVID-19) are lacking. Over a period of 3 weeks, over 100 clinicians, ethicists, leaders, and public health authorities convened virtually to achieve consensus on how best to save the most lives possible and share resources. This is referred to as population-based crisis management. The rapid regionalization of 22 acute care hospitals across 4500 square miles in the midst of a pandemic with a shifting regulatory landscape was challenging, but overcome by mutual trust, transparency, and confidence in the public health authority. Because many cities are facing COVID-19 surges, we share a process for successful rapid formation of health-care care coalitions, Crisis Standard of Care, and training of Triage Teams. Incorporation of continuous process improvement and methods for communication is essential for successful implementation. Use of our regional health-care coalition communications, incident command system, and the crisis care committee helped mitigate crisis care in the San Diego and Imperial County region as COVID-19 cases surged and scarce resource collaborative decisions were required.

Mesoscale features within the Gulf of Mexico (GOM) are known to influence zooplankton dynamics. Here we describe the composition of the zooplankton assemblage off shelf during summer in relation to environmental conditions, with emphasis on hyperiid amphipods and salps. Zooplankton samples were collected in summer of 2015 and 2016 in the central and southern GOM and in the Yucatan Channel in 2015. Two anticyclonic gyres were present in the north and less intense coupled cyclonic-anticyclonic gyres in the south. Zooplankton abundances differed temporally and spatially. Copepods were the dominant group (>55% of total abundance), while several less abundant taxa contributed to inter-annual and spatial differences. Amphipods and salps comprised <3% and their abundances were positively correlated. Fifty-six hyperiid and 10 salp species were identified. The dominant amphipod species were: Lestrigonus bengalensis (summer 2015), Anchylomera blossevillei and Primno spp. juveniles (summer 2016). Dominant salp species were Ihlea punctata, Iasis cylindrica and Thalia spp. Lower salp and amphipod species richness and abundance were associated with anticyclonic structures. Spatial and temporal differences were partly associated with symbiotic relationships between the groups. This study supports previous evidence of high spatial and temporal variability in zooplankton abundance in off-shelf waters of the GOM.

We describe an approach to the evaluation and isolation of hospitalized persons under investigation (PUIs) for coronavirus disease 2019 (COVID-19) at a large US academic medical center. Only a small proportion (2.9%) of PUIs with 1 or more repeated severe acute respiratory coronavirus virus 2 (SARS-CoV-2) nucleic acid amplification tests (NAATs) after a negative NAAT were diagnosed with COVID-19.

Results of a recent study designed to evaluate varying schedules by which cognitive behavioural group treatment of panic disorder with and without agoraphobia (PD) is delivered will be presented. Thirty-nine PD patients were randomly assigned to one of two group treatment schedules: (a) a standard CBT program (S-CBT) which consisted of 13 consecutive weekly two hours sessions, or (b) a massed CBT program (M-CBT) which consisted of daily four-hour sessions for five days in week one and two two-hour sessions in week two and one two-hour session in week three. Content of the treatment programs were identical. It was found that treatment led to significant improvements on all measures. Between-group analyses showed that the S-CBT and M-CBT were equally effective immediate after treatment as well as at three-month follow-up with no between-group differences in the number of patients who achieved clinically significant improvement. Also, there were no differences in drop-out rates or patient satisfaction between groups. The results are discussed in relation to prior research and advantages and disadvantages of both treatment schedules are considered.

One year follow-up data will be obtained in January 2008 and will be presented too.

Cognitive behavioural therapy (CBT) is an evidence-based psychotherapy and one of the most widely used treatments for mental health problems. It is generally acknowledged that supervision improves the quality of treatment although systematic descriptions and empirical evaluation of supervision have been sparse. Moreover, there are relatively few valid and reliable instruments to evaluate supervision. Based on a comprehensive review of the supervision literature, six competency domains were identified to cover the scope of CBT supervision: Theory, Focus, Learning strategy, Techniques, Structure, and Interpersonal style. The Moeller, Moerch, Rosenberg Supervision Scale (MMRSS) was developed to evaluate supervisor performance within each of these domains after observation of supervision. The present study examined the psychometric properties of the MMRSS (inter-rater reliability and construct validity), the clinical utility, and satisfaction when using MMRSS to evaluate CBT supervision. CBT supervisors (n = 8) were recruited for the study and provided videos of group supervision. A total of 21 videos were rated using the MMRSS and the Supervisory Competency Scale (SCS) by two independent raters. Supervisees and supervisors completed a satisfaction questionnaire to capture their experience of using the MMRSS during supervision of supervision. The MMRSS showed acceptable internal consistency and validity. Several domains in MMRSS (Structure, Learning strategy, and Interpersonal style) correlated significantly with the corresponding domains in the SCS for cognitive supervision. Preliminary results indicate that the MMRSS may be a valid and clinically useful tool to evaluate CBT supervision, although further systematic evaluation is needed.

This study examines the influence of chronic health conditions and socio-economic status on overnight admission and length of stay among Canadian seniors. Incremental multivariate logistic and zero-inflated negative binomial regression models assessed the relationship between selected predictors, overnight admission, and duration of stay. The findings show that all chronic health conditions and socio-economic factors examined were significantly associated with overnight hospital admission. However, seniors with cardiovascular health conditions, the very old, and seniors living in lower-income households had a greater risk of longer stays. Canadian seniors diagnosed with hypertension, cancer, diabetes, and stroke had greater risk of longer overnight hospital stays. Seniors aged 75 to 79 years, 80 years or older, and those living in lower-income households (≤ $39,999) were more likely to have a longer overnight hospital stay. Findings suggest that improving seniors’ health and socio-economic status may reduce the risk of overnight admission and longer stays of hospitalisation.

Health insurance schemes are important for bridging gaps in health-care needs between the rich and poor, especially in contexts where poverty is higher among seniors (persons aged 65 years and above). In this study we examined (a) gender-based predictors of unmet health-care need among seniors and (b) whether access was influenced by wealth status (measured by income quintiles). Gender-specific negative log–log regression models were fitted to data from the Study on Global Ageing and Health to examine associations between unmet health-care need and health insurance status controlling for theoretically relevant covariates. Insurance status was an important determinant of men and women's unmet health-care need but the relationship was moderated by income quintile for women and not men. While occupation was important for men, religion, marital status and income quintile were significantly associated with women's unmet health-care need. Based on the observed gender differences, we recommend the implementation of programmes aimed at improving the economic situation of older people, particularly women.

In “Physicalism and the Evolution of Consciousness” Roland Puccetti argues that the simultaneous isomorphism between mental and physical events required by the identity theory confers no selectiveadvantage on organisms manifesting it, and in consequence isrendered at least implausible, if not simply false, by the theory of natural selection. We shall try to show that his arguments are defective.