Frames of Reference in Mobile Augmented Reality Displays.

In 3 experiments, the authors investigated spatial updating in augmented reality environments. Participants learned locations of virtual objects on the physical floor. They were turned to appropriate facing directions while blindfolded before making pointing judgments (e.g., "Imagine you are facing X. Point to Y"). Experiments manipulated the angular difference between the learning heading and the imagined heading and between the actual heading and the imagined heading. The effect of actual-imagined on pointing latency was observed for naive users but not for users with brief training or instructions concerning the fact that objects can move with body movements. The results indicated that naive users used an environment-stabilized reference frame to access information arrays, but with experience and instruction the nature of the representation changed from an environment stabilized to a body stabilized reference frame. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Applying Spatial Augmented Reality to Anti-Smoking Message: Focusing on Spatial Presence,Negative Emotions,and Threat Appraisal

As smoking has emerged as a health-risk behavior, communication scholars and practitioners have put many efforts into finding out ways to achieve smoking cessation. In this research, participants (N = 57) were randomly assigned to a spatial augmented reality (SAR) condition (3D projection mapping) and 2D flat screen to be exposed to an anti-smoking message. This research provides insightful evidence that the effects of SAR on people’s behavioral intention to spread anti-smoking messages online could be explained by spatial presence and negative emotions. Implications for research on the potential of SAR in terms of emotions and online viral behavioral intentions are discussed.     

Exposure to styrene and mortality from nervous system diseases and mental disorders

Chronic low-dose exposure to solvents has been associated in epidemiologic studies with chronic neurotoxicity, but the evidence is not consistent. Styrene causes acute disturbances in the central and peripheral nervous systems. To determine if exposure to styrene may contribute to chronic diseases of the central nervous system, the authors examined mortality from nervous system diseases, mental disorders, and suicide in relation to styrene exposure in an international historical cohort study. The cohort involved 35,443 workers employed during 1945-1991 in the reinforced plastics industry, where high exposures to styrene occur. Indicators of exposure were reconstructed through job histories and environmental and biologic monitoring data. Poisson regression was used for internal comparisons. Mortality from diseases of the central nervous system (27 deaths) increased with time since first exposure, duration of exposure, average level of exposure, and cumulative exposure to styrene. A quadratic model described best the dose-response shape for cumulative exposure and duration of exposure with the highest risks at around 300 ppm-years and 5 years, respectively, and a subsequent decrease in risk in the highest exposure categories. Mortality from epilepsy increased monotonically with all styrene exposure indicators, while associations for degenerative diseases of the central nervous system were generally weaker. Mortality from mental disorders and suicide decreased with increasing duration of exposure and cumulative exposure, while there was no trend with time since first exposure and average exposure to styrene. These findings suggest that, in addition to the known acute effects, exposure to styrene may contribute to chronic diseases of the central nervous system.     

Presence of the nematode Physaloptera sibirica Petrow and Gorbunow 1931, parasite of carnivores, in the lerot Eliomys quercinus L. in the Alps

Radiolabelled sarcoma cells injected into the tail veins of normal rats were held up almost exclusively in the lung, and were not observed to pass through into the systemic circulation. Intramuscularly injected tumour cells were retained at the site of injection. Radioactivity was lost from both sites though more rapidly from the lung than from muscular tissue and was probably the result of tumour-cell death. Alveolar macrophages did not take part in the destruction of tumour cells in the lung. There was an increased rate of radiolabel loss from the lungs of hyperimmune, post-excision and tumour-bearing rats, as compared with normal rats. The destruction was immunologically specific; it was detected earlier, was more comprehensive in the hyperimmune and post-excision animals than in tumour-bearing animals, and correlated with the ability of the hyperimmune and post-excision animals to reject larger numbers of intravenous unlabelled tumour cells, than the tumour-bearing rats.     

Are there optimal levels of arousal to memory? Effects of arousal,centrality, and familiarity on brand memory in video games

Using a modified first-person shooter game, Counter Strike 2, this study tested (1) if the Yerkes–Dodson law could be applied to the relationship between physiological arousal (skin conductance) and brand memory in the new interactive technology setting; (2) if central and familiar ads are better recognized; and (3) if there are any interaction effects among arousal, centrality, and familiarity on brand memory. A pre-test was conducted to estimate the cut-off points of arousal into three levels (low, medium, and high) in the identical setting. Through within-subject analysis, a total of 550 cases were categorized into the three levels of arousal and analyzed. The results showed the highest recognition scores at the medium level of arousal, and no significant difference between the medium and high levels of arousal in brand memory. The participants remembered better centrally located brands than peripheral brands. Familiarity also had a positive relationship with the levels of arousal. Particularly, the recognition scores for centrally located brands increased with the levels of arousal, but no difference was found for peripheral brands. Findings and implications were discussed.     

Sensory realism and mediated aggression in video games

This study investigated whether sensory realism cues in violent games – blood color (red vs. blue), screams of pain (on vs. off), and player perspective (first-person vs. third-person) – affect players’ physiological arousal (i.e., skin conductance levels), spatial presence (i.e., sense of being physically “there”), and state aggression in a popular violent game (Half-Life 2), controlling for users’ prior game experiences. A path model (N = 160) was examined to see the mediation effects of arousal and presence between realism cues and state aggression. In line with the general aggression model, results showed that realistic blood color and screams increased arousal, but no effect was found for first-person perspective. Presence significantly affected users’ state aggression. However, contrary to our expectation based on the excitation transfer theory, arousal did not show any significant effect on aggression. In addition, presence mediated the influence of realistic blood color on state aggression. In the effects of graphic realism of violence on user aggression, presence did a crucial role. Implications and future studies were discussed.     

Integrating olive grove maintenance and energy biomass recovery with a single-pass pruning and harvesting machine

In Italy, olive tree groves may offer up to a million tonnes of dry biomass per year as pruning residue. Searching for a cost-effective way to tap this potential, the authors tested a new machine, capable of recovering pruning residue at the same time as pruning. The pre-commercial prototype was tested on four different plots and compared to a simpler tractor-base mechanical pruning unit. The authors conducted detailed time-studies in order to determine machine productivity and residue recovery cost. The integrated machine can treat between 0.2 and 0.6 ha h⁻¹, producing between 0.33 and 1.03 tonnes of fresh residue hour⁻¹. Its integrated residue recovery function does not slow the pruning, which actually proceeds faster than with the tractor-base unit, due to the more efficient multiple-disc cutting bar. The marginal cost of residue recovery hovers around 40-45 € fresh tonne⁻¹. However, the new machine must not be considered just as a biomass harvester, but rather as a mechanical pruning unit with an integrated biomass recovery function. Its main benefit derives from the capacity of performing a very effective mechanical pruning, and the residue recovery function is a secondary benefit yet unavailable on standard pruning machines. Its deployment must be seen in the context of a general effort to modernize olive grove management and to develop an integrated biomass production system, rather than as a further attempt to build a specialised biomass supply chain.