Aggression and defence in prehistoric Malta

Much has been written about the history of Malta regarding fortifications and warfare which has evolved from the Renaissance to recent times. No specific study has ever been attempted about the local aspects of aggression and defence in ancient times. This article attempts to investigate the causes of and the attitudes towards aggression in prehistoric times and the scenario of hostilities within the Mediterranean sphere in relation to evidence from the Maltese islands.peer-reviewe

The Effects of Mortality Salience and Autonomy Priming on Worldview Defensiveness

Terror Management Theory posits that people are motivated to defend against death awareness by maintaining cultural beliefs and behaviors that transcend mortality— sometimes motivating hostile, even militaristic, defenses of one’s culture. In contrast, self-determination theory suggests that autonomous regulation (self-determination) serves as a platform for personal growth and well-being. However, the present thesis suggests that, in addition to fueling growth, self-determination may also help buffer against the awareness of mortality, thus mitigating the impact of death awareness on hostile cultural worldview defense. To test this hypothesis, American participants were randomly assigned to be reminded of mortality or a control topic, then randomly assigned to be reminded of feelings of autonomy or being controlled, and then lastly completed a measure of one possible form of worldview defense: support for militaristic defense of American foreign policy interests in Syria. The present analysis found that death reminders increased that form of worldview defense, unless participants were first prompted to recall self-determination experiences

The Effects of Mortality Salience and Autonomy Priming on Worldview Defensiveness

Terror Management Theory posits that people are motivated to defend against death awareness by maintaining cultural beliefs and behaviors that transcend mortality— sometimes motivating hostile, even militaristic, defenses of one’s culture. In contrast, self-determination theory suggests that autonomous regulation (self-determination) serves as a platform for personal growth and well-being. However, the present thesis suggests that, in addition to fueling growth, self-determination may also help buffer against the awareness of mortality, thus mitigating the impact of death awareness on hostile cultural worldview defense. To test this hypothesis, American participants were randomly assigned to be reminded of mortality or a control topic, then randomly assigned to be reminded of feelings of autonomy or being controlled, and then lastly completed a measure of one possible form of worldview defense: support for militaristic defense of American foreign policy interests in Syria. The present analysis found that death reminders increased that form of worldview defense, unless participants were first prompted to recall self-determination experiences

New Media, New Influencers and Implications for Public Relations

Marketers and public relations professionals today are confronted with an astounding array of new communications channels. Internet-based social media tools like blogs, podcasts, online video and social networks are giving voice to the opinions of millions of consumers. While mainstream media continues to play a vital role in the dissemination of information, even these traditional channels are increasingly being influenced by online conversations. The "new influencers" are beginning to tear at the fabric of marketing as it has existed for 100 years, giving rise to a new style of marketing that is characterized by conversation and community. Marketers are responding to these forces with a mixture of excitement, fear and fascination. They're alarmed at the prospect of ceding control of their messages to a community of unknowns. Yet at the same time they're excited about the prospect of leveraging theese same tools to speak directly to their constituents without the involvement of media intermediaries.The Society for New Communications Research set out to conduct an examination of how influence patterns are changing and how communications professionals are addressing those changes by adopting social media. The goals were to discover how organizations:Define new influencers;Communicate and create relationships with them;Use social media to create influence; andMeasure the effects of these efforts.Another goal of the study was to use these discoveries to offer a set of recommendations to professional communicators

A comparative study of WASP-67b and HAT-P-38b from WFC3 data

Atmospheric temperature and planetary gravity are thought to be the main parameters affecting cloud formation in giant exoplanet atmospheres. Recent attempts to understand cloud formation have explored wide regions of the equilibrium temperature-gravity parameter space. In this study, we instead compare the case of two giant planets with nearly identical equilibrium temperature ($T_\mathrm{eq}$ $\sim 1050 \, \mathrm{K}$) and gravity ($g \sim 10 \, \mathrm{m \, s}^{-1})$. During $HST$ Cycle 23, we collected WFC3/G141 observations of the two planets, WASP-67 b and HAT-P-38 b. HAT-P-38 b, with mass 0.42 M$_\mathrm{J}$ and radius 1.4 $R_\mathrm{J}$, exhibits a relatively clear atmosphere with a clear detection of water. We refine the orbital period of this planet with new observations, obtaining $P = 4.6403294 \pm 0.0000055 \, \mathrm{d}$. WASP-67 b, with mass 0.27 M$_\mathrm{J}$ and radius 0.83 $R_\mathrm{J}$, shows a more muted water absorption feature than that of HAT-P-38 b, indicating either a higher cloud deck in the atmosphere or a more metal-rich composition. The difference in the spectra supports the hypothesis that giant exoplanet atmospheres carry traces of their formation history. Future observations in the visible and mid-infrared are needed to probe the aerosol properties and constrain the evolutionary scenario of these planets.Comment: 16 pages, 17 figures, 8 tables, accepted for publication in The Astronomical Journa

SNCR New Influencers Study

As more companies adopt social media, they struggle to find effective metrics for deciding who are the most influential players. This is among the initial findings of the SNCR's latest research study, New Media, New Influencers and Implications for the PR Profession.A survey was developed and targeted to the "power users" of social media. Nearly 300 PR, corporate and marketing communications professionals who are very experienced in social media participated in the survey, which focused on how influence patterns are changing and how communications professionals are addressing those changes. In addition, several case studies have been collected.Fifty-seven percent of respondents said that social media tools are becoming more valuable to their activities as more customers and influencers use them. Twenty-seven percent reported that social media is a core element of their communications strategy. Only three percent stated that social media has little or no value to their communications initiatives. Respondents believe that social media is most effective for the following sectors: arts, entertainment and recreation; communications; computer hardware and education.Blogs, podcasts, and social networks are changing the way we think about media and influence. We wanted to learn what criteria communications professionals use to define new influencers; how social media is being used to communicate with these influentials; and how to measure the effects of such efforts. The ultimate goal of the study is to offer a set of recommendations to the PR profession.Respondents reported that the most effective tools for their social media initiatives are currently: BlogsOnline videoSocial networks The top three criteria for determining the relevance and potential influence of a blogger or podcaster are: Quality of content on the blog or podcastRelevance of content to the company or brandSearch engine rankings Surprising to the researchers was the fact that criteria that measured online engagement for blogs and podcasts were among the least important to the respondents.However, for online communities and social networks, the top three criteria for evaluating influence do reflect the importance of online engagement: Participation levelFrequency of posting by the community memberName recognition of the individual Fifty-one percent of respondents are formally measuring the effects of their social media initiatives. The metrics they value most are enhancement of relationships with key audiences, enhancement of reputation, customer awareness of program and comments/posts relevant to organization/products. Close to the bottom of the list was traditional media coverage

Ulcerated lesions as a risk factor for Henoch-Schonlein purpura nephritis

Objective: To determine the correlation between the severity of Henoch-Schonlein purpura skin manifestations and development of nephritis and to characterise the disease within the Maltese paediatric population. -- Design: A retrospective analysis of the 96 cases diagnosed with Henoch-Schonlein purpura at Mater Dei Hospital between January 2008 and January 2016. Clinical notes were reviewed and anonymised data regarding the presentation, progression and follow-up of these cases was entered into a database. -- Results: 96 cases met the inclusion criteria with a male to female ratio of 1.35:1 and with a mean age at presentation of 6.4 years (interquartile range 3.5 years). 99% had the typical rash at presentation with 75% having other associated clinical findings. Renal involvement was found in 36.5%: isolated proteinuria in 19.8%, isolated haematuria in 13.5%, haematuria, proteinuria and hypertension in 3.1% and nephrotic range proteinuria in 2% of cases. A severe rash at presentation was shown to be a prognostic indicator for renal involvement. -- Conclusion: Henoch-Schonlein purpura in the Maltese paediatric population is similar in incidence to that quoted in the literature. The majority of cases are uncomplicated and the outcome is frequently favourable. The presence of a severe rash at presentation significantly increases the risk of renal involvement and long term complications.peer-reviewe

Aortic coarctation : never too late to diagnose, never too late to treat

We present two cases of severe aortic coarctation detected in adulthood and who underwent successful relief by transcatheter stent deployment using a new covered stent, Optimus® stent (AndraTec GmbH Koblenz, Germany). One patient is a 46-year old female with resistant arterial hypertension, in whom coarctation was suspected on a follow-up transthoracic echocardiogram for bicuspid aortic valve disease and subsequently confirmed on magnetic resonance imaging. The second patient is a 68-year old male whose coarctation was diagnosed incidentally at coronary angiography being performed as part of the preoperative work-up for severe aortic stenosis. Suprasternal views to assess aortic arch and flows in the proximal descending aorta should be a standard part of every transthoracic echocardiogram. Treatment of aortic coarctation should be considered irrespective of patient’s age.peer-reviewe

The effect of alloying elements on the properties of pressed and non-pressed biodegradable Fe–Mn–Ag powder metallurgy alloys

Current trends in the biodegradable scaffold industry call for powder metallurgy methods in which compression cannot be applied due to the nature of the scaffold template itself and the need to retain the shape of an underlying template throughout the fabrication process. Iron alloys have been shown to be good candidates for biomedical applications where load support is required. Fe–Mn alloys were researched extensively for this purpose. Current research shows that all metallurgical characterisation and corrosion test on Fe–Mn and Fe–Mn–Ag non pre-alloyed powder alloys are performed on alloys which are initially pressed into greens and subsequently sintered. In order to combine the cutting-edge field of biodegradable metallic alloys with scaffold production, metallurgical characterisation of pressed and non-pressed Fe, Fe–Mn and Fe–Mn–Ag sintered elemental powder compacts was carried out in this study. This was performed along with determination of the corrosion rate of the same alloys in in vitro mimicking solutions. These solutions were synthesised to mimic the osteo environment in which the final scaffolds are to be used. Both pressed and non-pressed alloys formed an austenite phase under the right sintering conditions. The corrosion rate of the non-pressed alloy was greater than that of its pressed counterpart. In a potentiodynamic testing scenario, addition of silver to the alloy formed a separate silver phase which galvanically increased the corrosion rate of the pressed alloy. This result wasn't replicated in the non-pressed alloys in which the corrosion rate was seen to remain similar to the non-silver-bearing alloy counterparts.peer-reviewe