A Gravity Dual of RHIC Collisions

In the context of the AdS/CFT correspondence we discuss the gravity dual of a heavy-ion-like collision in a variant of ${\cal N}=4$ SYM. We provide a gravity dual picture of the entire process using a model where the scattering process creates initially a holographic shower in bulk AdS. The subsequent gravitational fall leads to a moving black hole that is gravity dual to the expanding and cooling heavy-ion fireball. The front of the fireball cools at the rate of $1/\tau$, while the core cools as $1/\sqrt{\tau}$ from a cosmological-like argument. The cooling is faster than Bjorken cooling. The fireball freezes when the dual black hole background is replaced by a confining background through the Hawking-Page transition.Comment: 25 pages, 8 figures, Added references, Falling picture elucidate

Optical and motor changes associated with lighting and near vision tasks in electronic devices

Purpose: To assess optical and motor changes associated with near vision reading under different controlled lighting conditions performed with two different types of electronic screens. Methods: Twenty-four healthy subjects with a mean age of 22.9±2.3 years (18-33) participated in this study. An iPad and an e-ink reader were chosen to present calibrated text, and each task lasted 5 minutes evaluating both ambient illuminance level and luminance of the screens. Results:Eye-tracker data revealed a higher number of saccadic eye movements under minimum luminance than under maximum luminance. The results showed statistically significant differences between the iPad (p=0.016) and the e-ink reader (p=0.002). The length of saccades was also higher for the minimum luminance level for both devices: 6.2±2.8 mm and 8.2±4.2 mm (e-ink max vs min), 6.8±2.9 mm and 7.6±3.6 mm (iPad max vs min), and blinking rate increased significantly for lower lighting conditions. Conclusions: Performing reading tasks on electronic devices is highly influenced by both the configuration of the screens and the ambient lighting, meanwhile, low differences in visual quality that are transient in healthy young people, were found

Design is Everywhere, But Nowhere in Patent Analytics

The number of design patents has grown significantly in the last 140 years. However, a data-driven approach for design patents has been overlooked and underutilised in the design management and innovation research communities. Through the prism of a patent professional, data analyst and designer, this photo essay demystifies the complexity of design patent data and sheds light on the underlying value of design as it features among a range of diverse innovation activities. Patent network analysis and visualisation techniques enable the building of a series of patent citation maps and co-inventor networks. Cases from renowned companies—Apple, Dyson, Samsung, and LG electronics— reveal different shapes of innovation activities, focusing on product diversification strategies, collaboration patterns and design-technology cross-pollination flows

Design with forms as well as patterns

The research investigates How can the morphological approach in combination with the pattern language approach assist urban designers to achieve historical continuity in urban design both on theory and application levels. This research overviews the developments and applications of the two approaches worldwide with a special emphasis on the Dutch school. The Dutch morphological reduction technique and the Dutch interpretation of a pattern language are used in the case study—Wuhan, a Chinese city—to study the transformation of urban form and lifestyle. The multi-scalar historical morphological analysis results in an atlas that consists of four series of analytical maps on three levels of scale as well as 13 spatial structuring elements of the city; whereas the public life study results in a pattern book consisting of 20 individual patterns and three pattern languages. The practical implications and relevance for -- the design of -- the future of the city are discussed. The research is set up in a systematic and symmetrical manner for comparison of and reflection on the two approaches. It concludes that: The morphological approach can be used to interpret first space (perceived space) and convey its information into second space (conceived space), whereas the pattern language approach can be used to interpret third space (lived space) and convey its information into second space (conceived space). The morphological approach has a tendency to work from large scale to small scale and the pattern language approach tends to be built up from small scale to large scale, whereas urban design works with multiple scales at the same time. The morphological approach and the pattern language approach provide means for urban designers to systematically recognize historical layers so as to distil the meaning in the physical and non-physical contexts respectively. Consirately adding another layer that contains the contemporary meaning (design intervention) to these recognized layers is the way to pass down and simultaneously generate incremental change in the tradition of the context. This results in historical continuity and thus in permanence in urban design. The morphological approach, the pattern language approach, and urban design are processes in themselves and can be combined into one integrated process. The morphological approach, the pattern language approach and urban design are characterized by reduction, abstraction, interpretation, and communication. Some properties of the two approaches can be seen as counterparts because the roles these properties play in the design process tend to be similar: Individual homogeneous areas vs Individual patterns; Structural homogeneous areas vs Anchoring points/ Structuring patterns; Secondary connections in homogeneous areas vs Linkages between patterns; ? / Typology of homogeneous areas vs Clusters of patterns

Design with forms as well as patterns

The research investigates How can the morphological approach in combination with the pattern language approach assist urban designers to achieve historical continuity in urban design both on theory and application levels. This research overviews the developments and applications of the two approaches worldwide with a special emphasis on the Dutch school. The Dutch morphological reduction technique and the Dutch interpretation of a pattern language are used in the case study—Wuhan, a Chinese city—to study the transformation of urban form and life style. The multi-scalar historical morphological analysis results in an atlas that consists of four series of analytical maps on three levels of scale as well as 13 spatial structuring elements of the city; whereas the public life study results in a pattern book consisting of 20 individual patterns and three pattern languages. The practical implications and relevance for -- the design of -- the future of the city are discussed. The research is set up in a systematic and symmetrical manner for comparison of and reflection on the two approaches. It concludes that: The morphological approach can be used to interpret first space (perceived space) and convey its information into second space (conceived space), whereas the pattern language approach can be used to interpret third space (lived space) and convey its information into second space (conceived space). The morphological approach has a tendency to work from large scale to small scale and the pattern language approach tends to be built up from small scale to large scale, whereas urban design works with multiple scales at the same time. The morphological approach and the pattern language approach provide means for urban designers to systematically recognize historical layers so as to distill the meaning in the physical and non-physical contexts respectively. Consirately adding another layer that contains the contemporary meaning (design intervention) to these recognized layers is the way to pass down and simultaneously generate incremental change in the tradition of the context. This results in historical continuity and thus in permanence in urban design. The morphological approach, the pattern language approach, and urban design are processes in themselves and can be combined into one integrated process. The morphological approach, the pattern language approach and urban design are characterized by reduction, abstraction, interpretation, and communication. Some properties of the two approaches can be seen as counterparts, because the roles these properties play in the design process tend to be similar: –– Individual homogeneous areas vs Individual patterns; –– Structural homogeneous areas vs Anchoring points/ Structuring patterns; –– Secondary connections in homogeneous areas vs Linkages between patterns; –– ? / Typology of homogeneous areas vs Clusters of pattern