Decline in sea otter (Enhydra lutris) populations along the Alaska Peninsula, 1986–2001

During the 1990s, sea otter (Enhydra lutris) counts in the Aleutian archipelago decreased by 70% throughout the archipelago between 1992 and 2000. Recent aerial surveys in the Aleutians did not identify the eastward extent of the decline; therefore we conducted an aerial survey along the Alaska Peninsula for comparison with baseline information. Since 1986, abundance estimates in offshore habitat have declined by 27– 49% and 93 –94% in northern and southern Alaska Peninsula study areas, respectively. During this same time period, sea otter density has declined by 63% along the island coastlines within the south Alaska Peninsula study area. Between 1989 and 2001, sea otter density along the southern coastline of the Alaska Peninsula declined by 35% to the west of Castle Cape but density increased by 4% to the east, which may indicate an eastward extent of the decline. In all study areas, sea otters were primarily concentrated in bays and lagoon, whereas historically, large rafts of otters had been distributed offshore. The population declines observed along the Alaska Peninsula occurred at roughly the same time as declines in the Aleutian islands to the east and the Kodiak archipelago to the west. Since the mid-1980s, the sea otter population throughout southwest Alaska has declined overall by an estimated 56–68%, and the decline may be one of the most significant sea otter conservation issues in our time

Space station interior noise analysis program

Documentation is provided for a microcomputer program which was developed to evaluate the effect of the vibroacoustic environment on speech communication inside a space station. The program, entitled Space Station Interior Noise Analysis Program (SSINAP), combines a Statistical Energy Analysis (SEA) prediction of sound and vibration levels within the space station with a speech intelligibility model based on the Modulation Transfer Function and the Speech Transmission Index (MTF/STI). The SEA model provides an effective analysis tool for predicting the acoustic environment based on proposed space station design. The MTF/STI model provides a method for evaluating speech communication in the relatively reverberant and potentially noisy environments that are likely to occur in space stations. The combinations of these two models provides a powerful analysis tool for optimizing the acoustic design of space stations from the point of view of speech communications. The mathematical algorithms used in SSINAP are presented to implement the SEA and MTF/STI models. An appendix provides an explanation of the operation of the program along with details of the program structure and code

Appeal to bystander interventions: A normative approach to health and risk messaging

Bystander intervention is a form of helping that occurs when onlookers intercede to provide direct or indirect aid to a victim. When bystanders step in to prevent or reduce harm to others, they act as agents of primary and secondary health prevention. But theory and research suggest the bystander intervention process is complex and multiple social-psychological and situational barriers imperil bystander action. Bystanders are often ill-prepared to intervene when others are at risk for emotional or physical harm. They may not notice that someone needs help due to distraction from self-focus, engagement in social interaction, intoxication, or aspects of the situation like crowding or noise. Due to inadequate knowledge, bystanders may misdiagnose the situation and believe intervention is unnecessary. The negative consequences of nonintervention may be unknown to them such that the situation fails to increase their empathic arousal and motivate their action. Lacking knowledge, they may not recognize the seriousness of the situation and or the potential costs of inaction, and so are insufficiently alarmed. Pluralistic ignorance can arise when multiple uncertain bystanders conceal their concern and hesitate to act, assuming others’ inaction means intervention is inappropriate or unnecessary. When there are multiple witnesses, bystanders may assume their help is unneeded, place intervention responsibility on others, or feel less responsible for helping due to diffusion of responsibility. When the victim is not a member of their in-group, or is assumed at fault for their predicament, they may feel less empathy and a reduced responsibility to help. Or, bystanders may assign responsibility for intervention to the victim’s friends or fellow in-group members, or to those “in charge” of the setting. Even when bystanders realize help is needed and take responsibility for helping, they may not act if they do not know how or lack confidence in their ability to successfully carry out the actions required to help. When they have the skills, they may not help if they perceive the costs of action to outweigh the benefits of action. Audience inhibition arising from group norms supporting inaction and from bystander worry about what others will think about them if they act unnecessarily or ineptly can prevent bystander action by increasing bystanders’ perceived helping costs. Recognition of bystanders as a potentially valuable public health asset has increased interest in promoting bystander intervention. Bystander intervention promotion and communications empower bystander action by combating intervention- and audience-specific barriers to bystander intervention using targeted information, communications, and skills training. Theory and research suggest that effective promotions and communications foster context-specific attitudes, beliefs, norms, and skills such that bystanders: (1) are able to quickly and accurately identify a situation as intervention-appropriate; (2) experience action-motivating arousal (including empathy) in the face of the event; (3) have positive attitudes towards intervention and perceive the benefits of action as outweighing the perceived costs; (4) are empowered to act and feel confident in their ability to effectively intervene (bystander efficacy); and (5) are resistant to evaluation apprehension and norms contraindicating action. Effective bystander intervention promotion draws on social psychology and communications studies, and best practices for health promotion and prevention programs. The application of social marketing and formative and summative program evaluation methods enhance the potential of bystander intervention promotions and communications to empower bystander action

A novel method for the injection and manipulation of magnetic charge states in nanostructures

Realising the promise of next-generation magnetic nanotechnologies is contingent on the development of novel methods for controlling magnetic states at the nanoscale. There is currently demand for simple and flexible techniques to access exotic magnetisation states without convoluted fabrication and application processes. 360 degree domain walls (metastable twists in magnetisation separating two domains with parallel magnetisation) are one such state, which is currently of great interest in data storage and magnonics. Here, we demonstrate a straightforward and powerful process whereby a moving magnetic charge, provided experimentally by a magnetic force microscope tip, can write and manipulate magnetic charge states in ferromagnetic nanowires. The method is applicable to a wide range of nanowire architectures with considerable benefits over existing techniques. We confirm the method's efficacy via the injection and spatial manipulation of 360 degree domain walls in Py and Co nanowires. Experimental results are supported by micromagnetic simulations of the tip-nanowire interaction.Comment: in Scientific Reports (2016

'Just Married, Just a Child': Child Marriage in the Indo-Pacific Region

A detailed report on the many facets of child marriage, from its cause and impact to the necessary steps we must take to end the practice. There is also specific focus on Australia and the Indo-Pacific region and the role of the Australian government in ending child marriage

86 GHz Very Long Baseline Polarimetry of 3C273 and 3C279 with the Coordinated Millimeter VLBI Array

86 GHz Very Long Baseline Polarimetry probes magnetic field structures within the cores of Active Galactic Nuclei at higher angular resolutions and a spectral octave higher than previously achievable. Observations of 3C273 and 3C279 taken in April 2000 with the Coordinated Millimeter VLBI Array have resulted in the first total intensity (Stokes I) and linear polarization VLBI images reported of any source at 86 GHz. These results reveal the 86 GHz electric vector position angles within the jets of 3C273 and 3C279 to be orthogonal to each other, and the core of 3C273 to be unpolarized. If this lack of polarization is due to Faraday depolarization alone, the dispersion in rotation measure is >=90000 rad/m^2 for the core of 3C273.Comment: AASTeX v5.02; 10 pages; 4 figures; accepted for publication in the Astrophysical Journal Letter

Concurrent 43 and 86 GHz Very Long Baseline Polarimetry of 3C273

We present sub-milliarcsecond resolution total intensity and linear polarization VLBI images of 3C273, using concurrent 43 and 86 GHz data taken with the Very Long Baseline Array in May 2002. The structure seen in the innermost jet suggest that we have fortuitously caught the jet in the act of changing direction. The polarization images confirm that the core is unpolarized (fractional polarization m < 1 %) at 86 GHz, but also show well ordered magnetic fields (m ~ 15 %) in the inner jet, at a projected distance of 2.3 pc from the core. In this strongly polarized region, the rotation measure changes across the jet by 4.2 x 10^{4} rad m^{-2} over an angular width of about 0.3 milliarcseconds. If the lack of polarization in the core is also attributed to a Faraday screen, then a rotation measure dispersion > 5.2 x 10^{4} rad m^{-2} must be present in or in front of that region. These are among the highest rotation measures reported so far in the nucleus of any active galaxy or quasar, and must occur outside (but probably close to) the radio emitting region. The transverse rotation measure gradient is in the same sense as that observed by Asada et al and by Zavala and Taylor at greater core distances. The magnitude of the transverse gradient decreases rapidly with distance down the jet, and appears to be variable.Comment: 4 pages, LaTeX, 3 postscript figures, submitted to Astrophysical Journal Letter

Visitor effects on zoo-housed Sulawesi crested macaque (Macaca nigra) behaviour: Can signs with ‘watching eyes’ requesting quietness help?

Visiting public can cause changes in the behaviour of zoo-housed primates. These effects, if indicative of stress, can be of welfare concern. However, few options to mitigate visitor effects through modulating visitor behaviour have been explored. Here we evaluated the effects of visitor number and visitor noise level on the behaviour of five UK groups of Sulawesi crested macaques. We also investigated whether visitor behaviour can be effectively modulated through targeted signage requesting visitors to be quiet, and assessed the use of signs incorporating salient ‘watching’ human eyes, novel to a zoo setting, alongside ‘control’ signs lacking eyes. We used scan sampling to collect over 100 h of behavioural observation data, analysis of which indicated that Sulawesi crested macaques were significantly affected by both visitor number and noise level at all five zoos. We found that active behaviours, such as locomotion or foraging, and behaviours identified as negative for welfare, such as vigilance, increased with increasing visitor number and noise levels, whereas resting and social huddling decreased. The extent to which these behavioural changes reflect welfare, particularly the increase seen in active behaviours, is not clear. We also found that both sign treatments, with and without salient eyes, slightly but significantly reduced visitor noise levels compared with no sign, although signs displaying human eyes were not more effective than the control signs. Our results highlight a need for further research into active behaviours to assess whether increases in these behaviours are associated with stress. While we found signage to be a promising tool to mitigate against these visitor effects, our results also suggest areas in which signs incorporating salient human eyes could be adapted for the zoo environment in order to realise their full potential

Improving the Performance of Online Learning Teams - A Discourse Analysis

This paper compares the processes of Face-To-Face (FTF) teams and Online Learning Teams (OLTs) and proposes methods to improve the performance of OLTs. An empirical study reviewed the performance of fifteen FTF teams and OLTs and their communication patterns were coded by the IBMPO system developed by Futoran et al. (1989) in order to develop a discourse analysis for each team. The results confirmed that FTF teams outperformed OLTs and identified four approaches to improve the performance of OLTs: (1) Posting well-organized information; (2) Increasing process gain activities and decreasing process loss activities; (3) Instructions and facilitation to promote the discussion of process and content equally and facilitate better communication patterns; (4) Minimizing members\u27 absences. These are reviewed and practical solutions proposed

A qualitative exploration of psychosocial specialists’ experiences of providing support in U.K. burn care services

Introduction: A burn can have a significant and long-lasting psychosocial impact on a patient and their family. The National Burn Care Standards (2013) recommend psychosocial support should be available in all U.K. burn services, however little is known about how it is provided. The current study aimed to explore experiences of psychosocial specialists working in U.K. burn care, with a focus on the challenges they experience in their role.Methods: Semi-structured telephone interviews with eight psychosocial specialists (2 psychotherapists and 6 clinical psychologists) who worked within U.K. burn care explored their experiences of providing support to patients and their families. Results and Discussion: Thematic analysis revealed two main themes: burn service-related experiences and challenges reflected health professionals having little time and resources to support all patients; reduced patient attendance due to them living large distances from service; psychosocial appointments being prioritised below wound-related treatments; and difficulties detecting patient needs with current outcome measures. Therapy-related experiences and challenges outlined the sociocultural and familial factors affecting engagement with support; difficulties treating patients with pre-existing mental health conditions within the burn service; and individual differences in the stage at which patients are amenable to support. Conclusion: Findings provide an insight into the experiences of psychosocial specialists working in U.K burn care and suggest a number of ways in which psychosocial provision in the NHS burn service could be developed