The media go-along: Researching mobilities with media at hand

This article contributes methodologically and theoretically to Christine Hine’s call for a mobilities oriented internet ethnography. First, a ‘media go-along’, combining interviews and observations of a personal communication service at hand, is developed. Research participants give verbal and visual tours, framed by the researcher’s discursively constituted invitations for orientation. Then, a theoretical framework integrating an analysis of media environment mobilities is developed. From research material on hook-up and dating apps targeting non-heterosexual men, it is shown how 1) research participants’ navigation is materially contingent upon the medium and subject to momentary purposes and styles, 2) researcher presence and access must regularly be re-inscribed discursively, and 3) mobile media analysis, based on the media go-along’s representations of verbal, material, affective, and kinetic aspects of social interaction, is useful in the analysis of socially-conditioned access to, and production of, single media practice and experience

The media go-along:Researching mobilities with media at hand

This article contributes methodologically and theoretically to Christine Hine’s call for a mobilities oriented internet ethnography. First, a ‘media go-along’, combining interviews and observations of a personal communication service at hand, is developed. Research participants give verbal and visual tours, framed by the researcher’s discursively constituted invitations for orientation. Then, a theoretical framework integrating an analysis of media environment mobilities is developed. From research material on hook-up and dating apps targeting non-heterosexual men, it is shown how 1) research participants’ navigation is materially contingent upon the medium and subject to momentary purposes and styles, 2) researcher presence and access must regularly be re-inscribed discursively, and 3) mobile media analysis, based on the media go-along’s representations of verbal, material, affective, and kinetic aspects of social interaction, is useful in the analysis of socially-conditioned access to, and production of, single media practice and experience

Intra-Row Weed Control by use of Band Steaming

Disinfection of the soil by means of steaming has been a common method for eliminating weeds and fungal diseases. However, surface steaming of soil is a very energy-intensive process, and consequently, efforts have been made to develop a machine for narrow-band steaming of the soil under and around rows of cultivated plants prior to seeding. The use of this machine may achieve up to 90% energy savings, and will also reduce the amount of damage to the flora and fauna. Tests have shown that soil temperatures exceeding 70C will be needed to protect against germination of weed seeds. For band heating such a treatment in 50 cm rows requires about 5.8 GJ/ha

Interplay between chemistry and dynamics in embedded protostellar disks

Context. A fundamental part of the study of star formation is to place young stellar objects in an evolutionary sequence. Establishing a robust evolutionary classification scheme allows us not only to understand how the Sun was born but also to predict what kind of main sequence star a given protostar will become. Traditionally, low-mass young stellar objects are classified according to the shape of their spectral energy distributions. Such methods are, however, prone to misclassification due to degeneracy and do not constrain the temporal evolution. More recently, young stellar objects have been classified based on envelope, disk, and stellar masses determined from resolved images of their continuum and line emission at submillimeter wavelengths. Aims. Through detailed modeling of two Class I sources, we aim at determining accurate velocity profiles and explore the role of freeze-out chemistry in such objects. Methods. We present new Submillimeter Array observations of the continuum and HCO+ line emission at 1.1 mm toward two protostars, IRS 63 and IRS 43 in the Ophiuchus star forming region. The sources were modeled in detail using dust radiation transfer to fit the SED and continuum images and line radiation transfer to produce synthetic position-velocity diagrams. We used a χ2 search algorithm to find the best model fit to the data and to estimate the errors in the model variables. Results. Our best fit models present disk, envelope, and stellar masses, as well as the HCO+ abundance and inclination of both sources. We also identify a ring structure with a radius of about 200 AU in IRS 63. Conclusions. We find that freeze-out chemistry is important in IRS 63 but not for IRS 43. We show that the velocity field in IRS 43 is consistent with Keplerian rotation. Owing to molecular depletion, it is not possible to draw a similar conclusion for IRS 63. We identify a ring-shaped structure in IRS 63 on the same spatial scale as the disk outer radius. No such structure is seen in IRS 43

ARDENT - An Augmented Reality Framework for Education

Virtual Reality (VR) in education and medicine has been a widely researched area. Increase in motivation and learning gain is demonstrated to be directly related to introduction of VR applications. However, the necessity for expensive and bulky hardware limits the usability of VR. This problem can be partially solved by using Augmented Reality (AR), which is readily available in most modern smart devices. In later years the same kind of research has been increasing for AR, but to a lesser extent. This increase might be attributed to improved affordability and the rapid technological advances of smart devices. ARDENT is a framework for the standard development of an AR application and its swift deployment across diverse smart device platforms. The framework seeks to make it as effortless as possible for a user to deploy their models before a multitude of other users can see these models through their smart devices. Finally, this framework is showcased in a one-to-many teacher-student relationship for a seamless in-class AR experience

ARDENT - An Augmented Reality Framework for Education

Virtual Reality (VR) in education and medicine has been a widely researched area. Increase in motivation and learning gain is demonstrated to be directly related to introduction of VR applications. However, the necessity for expensive and bulky hardware limits the usability of VR. This problem can be partially solved by using Augmented Reality (AR), which is readily available in most modern smart devices. In later years the same kind of research has been increasing for AR, but to a lesser extent. This increase might be attributed to improved affordability and the rapid technological advances of smart devices. ARDENT is a framework for the standard development of an AR application and its swift deployment across diverse smart device platforms. The framework seeks to make it as effortless as possible for a user to deploy their models before a multitude of other users can see these models through their smart devices. Finally, this framework is showcased in a one-to-many teacher-student relationship for a seamless in-class AR experience