Search results

THE necessity for the development of high strength structural alloys was accentuated by the rapid development of the jet engine, a power unit which brought the speed of flight to within reach of the speed of sound. This major step in engine potentiality put a new urgency on the need for high strength structural alloys to be placed at the disposal of the designer. This deficiency was diminished to a large extent by the production of the aluminium‐zinc‐magnesium‐copper alloys. Once the potentialities were realized of this type of alloy having tensile strengths equal to the low carbon steels and a strength/weight ratio substantially superior to the aluminium‐copper alloys, it found widespread application for primary aircraft structures. The approximate chemical composition of the (Al‐Zn‐Mg‐Cu) alloys is given in table i and compared with that of the Al‐Cu or duralumin type alloys.

The purpose of this paper is to explore the sources of caffeine and its utilization in different food products, along with its impact on human health in terms of benefits and adverse effect.

The papers reviewed were selected based on the following key descriptors such as caffeine, sources, trends of consumption, utilization, benefits and adverse effects, regulation and labelling.

There are many physiological effects of caffeine on respiratory, cardiovascular, gastrointestinal, reproductive and central nervous system. It has a positive effect in reducing the risk of diabetes, Alzheimer’s disease, Parkinson’s disease and liver injury and, at the same time, in improving mood, psychomotor performance and immune response. On the other hand, the negative effects of caffeine include addiction, cancer, heart diseases, insomnia, gastrointestinal disturbances and intoxication. As caffeine, when taken in large amount, is harmful, therefore as per the regulatory bodies, its concentration should not exceed the set limit, and its presence needs to be listed on the label of that particular food product. In a nutshell, it can be said that caffeine acts as a boon as well as bane because it possesses both beneficial and adverse effects.

This is a unique and comprehensive review that will provide a brief overview of sources, utilization, healthful as well as harmful effect of caffeine to the readers.

Skin cancer is the world’s most prevalent form of cancer, yet it is one of the most preventable. Examines the challenge of communicating the “sun‐safety” health education message to teenagers. Teenagers represent a key audience, because skin‐cancer risks are strongly linked to sun‐exposure behaviour and experiences during adolescence. Focus groups involving those concerned with child sun‐safety were conducted in both Australia and the UK. In‐depth interviews with UK teenagers were used to explore their experience of the Internet and their opinions on its potential as a channel for promoting sun‐safety. Both Australian and UK teenagers felt that they lacked information on sun‐safety. Interviews showed that teenagers thought that a good Web site should have speed of access, ease of reading and navigation, good links, audio‐visual effects and interactivity. They saw the Internet as potentially useful in providing information about sun‐safety, suggesting the use of celebrities, prizes with competitions, and teenage‐ rather than health‐oriented sites. The evidence from this research suggests that sun‐safety is a health education issue on which the particular communication characteristics of the Internet can be utilised to good effect. The results suggest considerable synergy between the Internet as a medium, sun‐safety as a message and teenagers as an audience.

The workplace offers an ideal setting for facilitating physical activity and reducing sedentary behaviours. Understanding employees’ current health behaviours is required to inform appropriate, tailored, health promotion interventions. The purpose of this paper is to compare the physical activity and sedentary behaviours over 12 months of employees within and across five UK organisations. The paper also explores the association of these health behaviours with objective and self-reported health outcomes; and investigates the association between physical activity and sedentary behaviours.

Self-reported physical activity and sedentary behaviours were recorded at four time points (baseline, three, six, 12 months). BMI, per cent body fat, waist circumference, blood pressure and resting heart rate were collected in health checks (baseline, 12 months). Well-being and health were collected via questionnaire.

Low physical activity and high sedentariness were evident. Sitting levels varied by occupational role and organisation. More activity was associated with improved health outcomes; no association was evident for sedentary behaviour. No direct effects of occupational role or organisation on health outcomes emerged after accounting for physical activity/sedentary behaviours. Physical activity and sedentary levels were weakly associated.

The low activity levels are of particular concern as linked to health outcomes for this sample. The weak association between behaviours suggests worksite interventions should target both behaviours.

This study provides insight into both the physical activity and sedentary behaviours of employees of large UK employers across different occupational sectors over 12 months; importantly it is informed by the most recent guidance for these health behaviours.

Alternative Healthy Eating Index (AHEI)-2010, an index that determines the quality of a diet, was created to predict the risk of chronic diseases. Nevertheless, it is unclear whether this index can predict the risk of prostate cancer, one of the most prevalent cancers among men around the world. The study aims to investigate the association between adherence to the AHEI-2010 and the risk of prostate cancer in Iranian men.

The case–control study was conducted in Kermanshah, Iran in the year 2016. The study included 50 cases of Iranian men with prostate cancer and 150 healthy controls. Anthropometric indices were measured by bioelectric impedance analysis (BIA). The AHEI-2010 included 11 food components that were assessed by using a 147-item food frequency questionnaire. A multivariate logistic regression was performed to analyze the association of the AHEI-2010 (expressed as a dichotomous variable) with prostate cancer.

As per the analysis, there were no significant differences in age, body mass index (BMI) and waist-to-hip ratio (WHR) between case and control groups, statistically. After adjustment for potential confounders, the higher AHEI-2010 scores were associated with a lower risk of prostate cancer (OR AHEI > 55 vs ≤ 55 = 0.26; 95% CI: 0.11-0.63). Moreover, the Mean of AHEI scores was higher in controls than in the cases (p < 0.001).

The authors’ findings suggest that adherence to the dietary patterns with high scores of AHEI-2010 is associated with a reduced risk of prostate cancer, so this index may be used as an effective measure to predict prostate cancer.

Knight's Industrial Law Reports goes into a new style and format as Managerial Law This issue of KILR is restyled Managerial Law and it now appears on a continuous updating basis rather than as a monthly routine affair.

This chapter aims to review evidence of the relationships between dog ownership, dog walking and overall walking and the factors associated with dog walking. It reviews the evidence using a social ecological framework. The chapter finds that dog ownership and dog walking are associated with higher levels of walking. A number of social ecological factors are associated with dog walking. Motivation and social support provided by the dog to walk and a sense of responsibility to walk the dog are associated with higher levels of dog walking. Positive social pressure from family, friends, dog owners and veterinarians is also associated with higher levels of dog walking. Built and policy environmental characteristics influence dog walking, including dog-specific factors such as access to local attractive public open space with dog-supportive features (off-leash, dog waste bags, trash cans, signage), pet-friendly destinations (cafes, transit, workplaces, accommodation) and local laws that support dog walking. Large-scale intervention studies are required to determine the effect of increased dog walking on overall walking levels. Experimental study designs, such as natural and quasi-experiments, are needed to provide stronger evidence for causal associations between the built and policy environments and dog walking. Given the potential of dog walking to increase population-levels of walking, urban, park and recreational planners need to design neighbourhood environments that are supportive of dog walking and other physical activity. Advocacy for dog walking policy-relevant initiatives are needed to support dog walking friendly environments. Health promotion practitioners should make dog walking a key strategy in social marketing campaigns.

Uncertainty-identity theory serves as our guiding theoretical framework to explore subjective uncertainty, especially uncertainty about self and identity, and the ways in which communication within groups provides valuable social identity information to group members as a means to manage subjective uncertainty.

We review and synthesize research in communication science and social identity theory, specifically uncertainty-identity theory, to compare diverse understandings of uncertainty and the identity-shaping function of communication within groups.

Uncertainty inherent in dyadic interactions has received extensive attention in communication science. However, the identity-defining function of communication that flows within and between groups as a means to resolving uncertainty about subjectively important matters has received little attention in both social psychology and communication science.

We explore how communication that flows from in-group sources (e.g., leaders) serves to shape a shared reality and identity for group members while providing a framework for self-definition. We propose an agenda for future research that would benefit from an articulation of the importance of communication in the shaping and management of identity-uncertainty.

Uncertainty arousing rhetoric by influential in-group sources, such as leaders and the media can have serious implications for intergroup relations, as uncertain individuals seek distinctive and tight-knit groups and autocratic leaders under conditions of heightened uncertainty. The role that communication plays in shaping clear and distinct identities as a panacea for identity-uncertainty has implications for the intragroup normative structure of the group and for intergroup relations.

Social media encourage interactions between customers and brands. Concerning the cues utilized during social media interactions, verbal cues (i.e. the language used) gain importance, since non-verbal and paraverbal cues are hard to convey via social media. Looking at interpersonal interactions, interlocutors adopt each other’s language styles or maintain their own language style during interactions to build trust. Transferring these insights to social media, the purpose of this paper is to test the effects of a brand’s language style accommodation in brand-customer interactions on brand trust and on its antecedents.

Two quantitative pre-studies (n₁ (questionnaire)=32, n₂ (laboratory experiment)=199), and one quantitative main study (n₃ (laboratory experiment)=427) were conducted to determine the effects of a brand’s language style accommodation on brand trust.

In line with communication accommodation theory, this paper reveals that the impact of a brand’s accommodation strategy on brand trust is mediated by perceived relationship investments, such as perceived interaction effort, benevolence, and quality of interaction. This paper also underscores language style’s roles and its fit, and sheds light on situational factors such as purchase decision involvement and the valence of the content.

This paper is the first to transfer cross-disciplinary theories on interpersonal interactions to brand-customer interactions in social media. Thus, the authors derive the effects of language style accommodation on brand trust as well as further mediating effects.