Solar proton monitoring system

Solar proton monitoring system in North Americ

Acoustic interaction of humpback whales and recreational fishing vessels in a temperate fjord - Measurements in Rivers' Inlet, British Columbia

Underwater environments are acoustically complex and highly variable. Natural processes, biological organisms and human activities all emit sound, at various levels and over broad frequency ranges. To facilitate ocean resources management and mitigate impacts of anthropogenic noise, areas where these sources interact in the space, time and frequency domains need to be identified. This paper presents analyses of field measurements taken on the west coast of Canada in August/September 2008, along the temperate fjord of Rivers’ Inlet (British Columbia). Humpback whales (Meganoptera novaeangliae) use this fjord as a feeding ground, sharing it with recreational fishing craft mostly consisting of small boats (20 m or less). Measurements were taken over several days at regularly-spaced locations in deep water from the mouth of the fjord inward, using a broadband (0.1 – 30 kHz effective bandwidth) hydrophone deployed 10 m deep. Analysis focused on the joint use of acoustic bandwidths by humpback whales and recreational fishing vessels. Recorded spectra of humpback whale vocalizations and vessel noise overlapped considerably in the range 0.1 – 1 kHz. At the distances recorded (> 1 km) vessel noise produced a mean increase of 4 dB above background levels in this range. Ambient noise levels are also discussed briefly with reference to previous studies

Acoustic interaction of humpback whales and recreational fishing vessels in a temperate fjord - Measurements in Rivers' Inlet, British Columbia

Underwater environments are acoustically complex and highly variable. Natural processes, biological organisms and human activities all emit sound, at various levels and over broad frequency ranges. To facilitate ocean resources management and mitigate impacts of anthropogenic noise, areas where these sources interact in the space, time and frequency domains need to be identified. This paper presents analyses of field measurements taken on the west coast of Canada in August/September 2008, along the temperate fjord of Rivers’ Inlet (British Columbia). Humpback whales (Meganoptera novaeangliae) use this fjord as a feeding ground, sharing it with recreational fishing craft mostly consisting of small boats (20 m or less). Measurements were taken over several days at regularly-spaced locations in deep water from the mouth of the fjord inward, using a broadband (0.1 – 30 kHz effective bandwidth) hydrophone deployed 10 m deep. Analysis focused on the joint use of acoustic bandwidths by humpback whales and recreational fishing vessels. Recorded spectra of humpback whale vocalizations and vessel noise overlapped considerably in the range 0.1 – 1 kHz. At the distances recorded (> 1 km) vessel noise produced a mean increase of 4 dB above background levels in this range. Ambient noise levels are also discussed briefly with reference to previous studies

1960 Ruby Yearbook

A digitized copy of the 1960 Ruby, the Ursinus College yearbook.https://digitalcommons.ursinus.edu/ruby/1063/thumbnail.jp

Kochen-Specker Vectors

We give a constructive and exhaustive definition of Kochen-Specker (KS) vectors in a Hilbert space of any dimension as well as of all the remaining vectors of the space. KS vectors are elements of any set of orthonormal states, i.e., vectors in n-dim Hilbert space, H^n, n>3 to which it is impossible to assign 1s and 0s in such a way that no two mutually orthogonal vectors from the set are both assigned 1 and that not all mutually orthogonal vectors are assigned 0. Our constructive definition of such KS vectors is based on algorithms that generate MMP diagrams corresponding to blocks of orthogonal vectors in R^n, on algorithms that single out those diagrams on which algebraic 0-1 states cannot be defined, and on algorithms that solve nonlinear equations describing the orthogonalities of the vectors by means of statistically polynomially complex interval analysis and self-teaching programs. The algorithms are limited neither by the number of dimensions nor by the number of vectors. To demonstrate the power of the algorithms, all 4-dim KS vector systems containing up to 24 vectors were generated and described, all 3-dim vector systems containing up to 30 vectors were scanned, and several general properties of KS vectors were found.Comment: 19 pages, 6 figures, title changed, introduction thoroughly rewritten, n-dim rotation of KS vectors defined, original Kochen-Specker 192 (117) vector system translated into MMP diagram notation with a new graphical representation, results on Tkadlec's dual diagrams added, several other new results added, journal version: to be published in J. Phys. A, 38 (2005). Web page: http://m3k.grad.hr/pavici

Advancing tendencies? PR leadership, general leadership, and leadership pedagogy

What are the best ways to advance PR leadership? In exploring answers, we consider the last two decades of PR literature and identify two main tendencies. We link those two with general leadership literature and practices, as well as with literature on leadership pedagogy. We conclude that, rather than recent moves to look within the field, without self-reflection, to existing PR perspectives and figures for solutions, looking outwards has greater potential to transform not only the PR leadership literature, and PR practice, but also to create less hierarchical, and more democratic and "leaderful," PR workplaces. © 2014

Remembering the Sea: Personal and Communal Recollections of Maritime Life in Jizan and the Farasan Islands, Saudi Arabia

This is the final version of the article. Available from the publisher via the DOI in this record.People create narratives of their maritime past through the remembering and forgetting of seafaring experiences, and through the retention and disposal of maritime artefacts that function mnemonically to evoke or suppress those experiences. The sustenance and reproduction of the resulting narratives depends further on effective media of intergenerational transmission; otherwise, they are lost. Rapid socio-economic transformation across Saudi Arabia in the age of oil has disrupted longstanding seafaring economies in the Red Sea archipelago of the Farasan Islands, and the nearby mainland port of Jizan. Vestiges of wooden boatbuilding activity are few; long-distance dhow trade with South Asia, the Arabian-Persian Gulf and East Africa has ceased; and a once substantial pearling and nacre (mother of pearl) collection industry has dwindled to a tiny group of hobbyists: no youth dive today. This widespread withdrawal from seafaring activity among many people in these formerly maritime-oriented communities has diminished the salience of such activity in cultural memory, and has set in motion narrative creation processes, through which memories are filtered and selected, and objects preserved, discarded, or lost. This paper is a product of the encounter of the authors with keepers of maritime memories and objects in the Farasan Islands and Jizan. An older generation of men recall memories of their experiences as boat builders, captains, seafarers, pearl divers and fishermen. Their recounted memories are inscribed, and Arabic seafaring terms recorded. The extent of the retention of maritime material cultural items as memorials is also assessed, and the rôle of individual, communal and state actors in that retention is considered. Through this reflection, it becomes clear that the extra-biological memory and archive of the region’s maritime past is sparse; that intergenerational transmission is failing; that the participation of state agencies in maritime heritage creation is highly limited; and that, as a result, memories current among the older generation have limited prospect of survival. These memories, recorded and interpreted here, identify the Farasan Islands as a former centre of the pearling industry in the Red Sea, and identify them and Jizan as open to far-reaching maritime-mediated cultural influences in an era before the imposition of the attributes of the modern nation-state.This study was funded by the Golden Web Foundation (UK registered charity number 1100608), with additional support from the Seven Pillars of Wisdom Trust (UK registered charity number 208669)

Phosphorylation of AMPA Receptors Is Required for Sensory Deprivation-Induced Homeostatic Synaptic Plasticity

Sensory experience, and the lack thereof, can alter the function of excitatory synapses in the primary sensory cortices. Recent evidence suggests that changes in sensory experience can regulate the synaptic level of Ca2+-permeable AMPA receptors (CP-AMPARs). However, the molecular mechanisms underlying such a process have not been determined. We found that binocular visual deprivation, which is a well-established in vivo model to produce multiplicative synaptic scaling in visual cortex of juvenile rodents, is accompanied by an increase in the phosphorylation of AMPAR GluR1 (or GluA1) subunit at the serine 845 (S845) site and the appearance of CP-AMPARs at synapses. To address the role of GluR1-S845 in visual deprivation-induced homeostatic synaptic plasticity, we used mice lacking key phosphorylation sites on the GluR1 subunit. We found that mice specifically lacking the GluR1-S845 site (GluR1-S845A mutants), which is a substrate of cAMP-dependent kinase (PKA), show abnormal basal excitatory synaptic transmission and lack visual deprivation-induced homeostatic synaptic plasticity. We also found evidence that increasing GluR1-S845 phosphorylation alone is not sufficient to produce normal multiplicative synaptic scaling. Our study provides concrete evidence that a GluR1 dependent mechanism, especially S845 phosphorylation, is a necessary pre-requisite step for in vivo homeostatic synaptic plasticity