Do all chlorophyll fluorescence emission wavelengths capture the spring recovery of photosynthesis in boreal evergreen foliage?

Chlorophyll a fluorescence (ChlF) is closely related to photosynthesis and can be measured remotely using multiple spectral features as solar-induced fluorescence (SIF). In boreal regions, SIF shows particular promise as an indicator of photosynthesis, in part because of the limited variation of seasonal light absorption in these ecosystems. Seasonal spectral changes in ChlF could yield new information on processes such as sustained nonphotochemical quenching (NPQ(S)) but also disrupt the relationship between SIF and photosynthesis. We followed ChlF and functional and biochemical properties of Pinus sylvestris needles during the photosynthetic spring recovery period to answer the following: (a) How ChlF spectra change over seasonal timescales? (b) How pigments, NPQ(S), and total photosynthetically active radiation (PAR) absorption drive changes of ChlF spectra? (c) Do all ChlF wavelengths track photosynthetic seasonality? We found seasonal ChlF variation in the red and far-red wavelengths, which was strongly correlated with NPQ(S), carotenoid content, and photosynthesis (enhanced in the red), but not with PAR absorption. Furthermore, a rapid decrease in red/far-red ChlF ratio occurred in response to a cold spell, potentially relating to the structural reorganization of the photosystems. We conclude that all current SIF retrieval features can track seasonal photosynthetic dynamics in boreal evergreens, but the full SIF spectra provides additional insight.Peer reviewe

“Submitting Love?”: a sensory sociology of Southbourne

This article seeks to remember the Southbourne building of Sheffield Hallam University, United Kingdom, which housed students, academics, and administrative staff until August 2014. Data were collected from an ethnographic observation study of students handing in completed coursework. Findings are presented in the form of an audio “soundscape” and a literary narrative. It is argued that these hypermodal tools should form a growing part of qualitative inquiry as sensory social research. The historic application and practical impediments of such sensorial and aural techniques are discussed, alongside the challenge they provide to the received practices concerning how journal articles can be experienced

GIFT:Hybrid Museum Experiences through Gifting and Play

he GIFT project develops new approaches to creating hybrid physi-cal-digital visitor experiences in museums. Through design exploration of two concepts focusing on gifting and playful appropriation, the project charts how museums can create a deeper and more meaningful experience by giving visitors the tools to tell their own stories. The project is highly cross-disciplinary com-bining HCI research, artist-led exploration, technology explorations, and experi-ence design in collaboration with museums. Furthermore, the project gathers 10 prominent museums from Europe and the US in an action research project that both serves to ground the prototypes and framework in the needs of museums, while also facilitating the museum sector's need to become 'digital-ready', under-standing and capitalising on digital technology. As the project has progressed through half of its duration, we report on initial findings and how these have shaped our direction of progress

Getting It on Record: Issues and Strategies for Ethnographic Practice in Recording Studios

The recording studio has been somewhat neglected as a site for ethnographic fieldwork in the field of ethno-musicology and, moreover, the majority of published studies tend to overlook the specific concerns faced by the researcher within these contexts. Music recording studios can be places of creativity, artistry, and collaboration, but they often also involve challenging, intimidating, and fractious relations. Given that recording studios are, first and foremost, concerned with documenting musicians’ performances, we discuss the concerns of getting studio interactions “on record” in terms of access, social relations, and methods of data collection. This article reflects on some of the issues we faced when conducting our fieldwork within British music recording facilities and makes suggestions based on strategies that we employed to address these issues

Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC

Measurements of inclusive jet suppression in heavy ion collisions at the LHC provide direct sensitivity to the physics of jet quenching. In a sample of lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an integrated luminosity of approximately 7 inverse microbarns, ATLAS has measured jets with a calorimeter over the pseudorapidity interval |eta| < 2.1 and over the transverse momentum range 38 < pT < 210 GeV. Jets were reconstructed using the anti-kt algorithm with values for the distance parameter that determines the nominal jet radius of R = 0.2, 0.3, 0.4 and 0.5. The centrality dependence of the jet yield is characterized by the jet "central-to-peripheral ratio," Rcp. Jet production is found to be suppressed by approximately a factor of two in the 10% most central collisions relative to peripheral collisions. Rcp varies smoothly with centrality as characterized by the number of participating nucleons. The observed suppression is only weakly dependent on jet radius and transverse momentum. These results provide the first direct measurement of inclusive jet suppression in heavy ion collisions and complement previous measurements of dijet transverse energy imbalance at the LHC.Comment: 15 pages plus author list (30 pages total), 8 figures, 2 tables, submitted to Physics Letters B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-02

Playing Games with Tito:Designing Hybrid Museum Experiences for Critical Play

This article brings together two distinct, but related perspectives on playful museum experiences: Critical play and hybrid design. The article explores the challenges involved in combining these two perspectives, through the design of two hybrid museum experiences that aimed to facilitate critical play with/in the collections of the Museum of Yugoslavia and the highly contested heritage they represent. Based on reflections from the design process as well as feedback from test users, we describe a series of challenges: Challenging the norms of visitor behaviour, challenging the role of the artefact, and challenging the curatorial authority. In conclusion, we outline some possible design strategies to address these challenges

Designing Public Play : Playful Engagement, Constructed Activity, and Player Experience

This thesis sets out to explore why people engage in, and how to design for, play in a public setting. It does this by separating design for play from design of games, describing play as a socially and mentally understood activity, and a playful approach to engaging in that activity. It emphasises that while play is voluntary, design can help shape the players’ mode of engagement. The thesis uses a qualitative and inductive approach to research, with an understanding of knowledge as being constructed in the individual. The research is grounded in human computer interaction and interaction design, and closely related to game studies and design science. The research question concerns how design can influence the player activity in order to create a desired player experience in public, by harnessing playful engagement. It’s foundation is a theory of play which describes play as a framed, or hedged-off, activity with a fragile border; where knowledge and feelings can leak both in and out of the activity, and affect the play as well as what is around it. The theory of enjoyment of play is discussed, and the problem of treating this as ‘fun’ is addressed, concluding in a presentation of how playful engagement can be harnessed through design. The theory is applied in five design cases: I’m Your Body, a locative storytelling app; Codename Heroes, a pervasive game of personal empowerment; Passing On, a slow-paced game about communication; Busking Studies, which involves observing street performers and their shows; and DigiFys, an architectural design exploration of playgrounds and play paths. Finally, three concepts, or design tools, are presented, which address: 1) a structure for understanding a design through three layers, constructs designed by the designer, inspiring play activity with the player, leading to experience; 2) an approach to designing invitations to play; and finally 3), a four faceted structure for understanding play engagement when players engage in non intended ways