Potential use of offshore marine structures in rebuilding an overfished rockfish species, bocaccio (Sebastes paucispinis)

Although bocaccio (Sebastes paucispinis) was an economically important rockfish species along the west coast of North America, overfishing has reduced the stock to about 7.4% of its former unfished population. In 2003, using a manned research submersible, we conducted fish surveys around eight oil and gas platforms off southern California as part of an assessment of the potential value of these structures as fish habitat. From these surveys, we estimated that there was a minimum of 430,000 juvenile bocaccio at these eight structures. We determined this number to be about 20% of the average number of juvenile bocaccio that survive annually for the geographic range of the species. When these juveniles become adults, they will contribute about one percent (0.8%) of the additional amount of fish needed to rebuild the Pacific Coast population. By comparison, juvenile bocaccio recruitment to nearshore natural nursery grounds, as determined through regional scuba surveys, was low in the same year. This research demonstrates that a relatively small amount of artificial nursery habitat may be quite valuable in rebuilding an overfished species

Educators' perspectives on supporting students' mental health within the framework of positive behavioural interventions and supports

A significant number of students are living with diagnosed and undiagnosed mental health disorders such as anxiety, depression, post-traumatic stress disorder, schizophrenia and substance-use, and this number has only increased due to the COVID-19 worldwide pandemic. When students are demonstrating symptoms of languishing mental health within the classroom, it is the classroom teachers, resource teachers and counsellors who experience first-hand, the challenges that come along with this, and work to implement strategies to support these students. This qualitative study has the purpose of obtaining the perspectives of classroom and support teachers on their experiences in working with students with mental health needs and how they are addressed and supported in school-based settings that are implementing Positive Behavioural Interventions and Supports (PBIS). The data from individual interviews were analysed and coded, revealing six themes: 1) Diversity of student mental health and wellbeing in the classroom, 2) Implementation and integration of PBIS and SEL, 3) Strategies to support student mental health and wellbeing in schools, 4) Barriers and challenges in supporting student mental health and wellbeing in schools, 5) Effect of PBIS on student mental health, and 6) Impact of Covid-19 on students’ and teachers’ mental health and wellbeing. This study makes recommendations for change in current practice in schools, including the integration of PBIS and SEL, administrator support of instructional strategies that foster positive mental health, and the development of school culture that has an emphasis on collaboration and co-teaching.May 202

The Epipelagic Fish Community of Beaufort Sea Coastal Waters, Alaska

A three-year study of epipelagic fishes inhabiting Beaufort Sea coastal waters in Alaska documented spatial and temporal patterns in fish distribution and abundance and examined their relationships to thermohaline features during summer. Significant interannual, seasonal, and geographical differences in surface water temperatures and salinities were observed. In 1990, sea ice was absent and marine conditions prevailed, whereas in 1988 and 1991, heavy pack ice was present and the dissolution of the brackish water mass along the coast proceeded more slowly. Arctic cod, capelin, and liparids were the most abundant marine fishes in the catches, while arctic cisco was the only abundant diadromous freshwater species. Age-0 arctic cod were exceptionally abundant and large in 1990, while age-0 capelin dominated in the other years. The alternating numerical dominances of arctic cod and age-0 capelin may represent differing species' responses to wind-driven oceanographic processes affecting growth and survival. The only captures of age-0 arctic cisco occurred during 1990. Catch patterns indicate they use a broad coastal migratory corridor and tolerate high salinities. As in the oceanographic data, geographical and temporal patterns were apparent in the fish catch data, but in most cases these patterns were not statistically testable because of excessive zero catches. The negative binomial distribution appeared to be a suitable statistical descriptor of the aggregated catch patterns for the more common species.Une étude de trois ans portant sur les poissons épipélagiques habitant les eaux côtières de la mer de Beaufort en Alaska décrit les schémas spatiaux et temporaux de la distribution et de l'abondance des poissons et examine leurs rapports avec les caractéristiques thermohalines durant l'été. On a observé d'importantes différences interannuelles, saisonnières et géographiques dans la température et la salinité de l'eau de surface. En 1990, la glace de mer était absente et des conditions marines régnaient, tandis qu'en 1988 et 1991, la glace de mer était épaisse et la dissolution de l'eau saumâtre le long du littoral s'est réalisée plus lentement. La morue polaire, le capelan et les liparis étaient les poissons marins qu'on retrouvait en plus grandes quantités dans les prises, tandis que le cisco arctique était la seule espèce d'eau douce diadrome qu'on retrouvait en abondance. En 1990, la morue polaire âgée de moins d'un an était particulièrement abondante et de taille importante, tandis que le capelan âgé de moins d'un an prédominait durant les autres années. L'alternance de la dominance numérique de la morue polaire et du capelan de moins d'un an pourrait signaler une réaction différente des espèces à des phénomènes océanographiques dus au vent, affectant la croissance et la survie. Les seules captures de cisco arctique de moins d'un an se sont produites en 1990. Les schémas de prises indiquent que les poissons utilisent un vaste corridor migratoire le long du littoral et tolèrent un taux élevé de salinité. Comme pour les données océanographiques, des schémas géographiques et temporaires étaient apparents pour les données des prises de poissons, mais, dans la plupart des cas, ces schémas ne pouvaient être testés sur le plan statistique en raison du trop grand nombre de prises nulles. La distribution binomiale négative semblait être un descripteur statistique approprié des schémas de prises cumulatifs pour les espèces plus courantes.

Does Unconscious Thought Outperform Conscious Thought On Complex Decisions? A Further Examination

Two experiments examined the benefits of unconscious thought on complex decisions (Dijksterhuis, 2004). Experiment 1 attempted to replicate and extend past research by examining the effect of providing reasons prior to rating the options. Results indicated no significant differences between the conditions. Experiment 2 attempted to replicate the findings of Dijksterhuis, Bos, Nordgren, and van Baaren (2006) and determine if a memory aid could overcome the limitations of conscious thought on complex tasks. Results revealed that a memory aid improved decisions compared to the conscious thought condition. Participants in the unconscious thought condition did not perform significantly better than did participants in the conscious thought condition

Big Gifts for Little Learners: Making the Case for Philanthropic Investment From Pregnancy Through Preschool

The San Francisco Bay Area is home to some of the wealthiest counties and most generous donors in the country. But how do those individuals choose where to spend their philanthropic dollars?In our 2021 survey of Bay Area donors, which included both affluent individuals and foundations, 40% of respondents said that when considering causes or groups to give to, demonstrated impact would lead them to choose one cause or group over others.In some ways it is surprising, then, that only 15% of donors said they give to early care and learning -- an area with robust research demonstrating positive impact on the children supported (including permanent increases in children's IQ and better health outcomes) as well as on their families and the broader community (e.g., gains in maternal workforce participation)

A Quantized Delay-Lock Discriminator

A new radar tracking detector using fixed delay lines in place of continuously variable delay lines is described. The fixed delays are switched in and out depending on the output of a correlator. Results of a working system are shown using bang-bang feedback and analog-to-digital feedback, for tracking a time-varying delay. ThesisMaster of Engineering (MEngr

Single GPS Antenna Attitude Vector Pair - NEOSSat Recovery

In flight, the Near Earth Object Surveillance Satellite (NEOSSat) lost use of its single-string magnetometer that was necessary to coarsely solve the attitude problem and seed the satellite\u27s star tracker for fine attitude determination. Unable to determine attitude, satellite control was lost and an ad-hoc, in-flight, solution was needed to recover operations. Building on existing GPS literature, NEOSSat\u27s GPS receiver was augmented, in software, to estimate the antenna\u27s look direction, in an inertial frame of reference. Matched with the known (mounting) vector in the body frame, a vector pair was successfully created that replaced the one from the magnetometer. This paper describes the mission context, algorithms, calibration methods, software implementation, testing (ground and flight) and optimizations that enabled the on-orbit GPS receiver to become a successful attitude sensor. The results, RMS errors within 10 degrees without mitigation of multipath effects, are generally applicable to satellites that have even just one GPS receiver and antenna and represent an alternate or back-up means of contributing to coarse attitude determination