title: Diverse voices and alternative rationalities: Imagining forms of postcolonial organizational communication

authors: Broadfoot, Kirsten J.

subjects: organizational communication

abstract: In his exploration of nationalism and imagined communities, Anderson (1991) claims that nations are “imagined” (that is, they are constructions), insomuch that people are convinced of the comradeship of unknown fellow compatriots, often ignoring any actual inequality and exploitation that exists in such an imagined community. In a similar fashion, we argue that the subdiscipline or community of organizational communication scholars is also imagined, as much organizational communication scholarship conducted within the global context is performed and interpreted from the dominant Euro-American intellectual tradition, privileging those concepts as well as particular voices and traditions and often ignoring inequality and exploitation within the scholarly community. This forgetting and the imagined scholarly community it creates continue to reify and legitimate a particular form of rationality and, in practice, lead to further colonization, subordination, and oppression of native/indigenous/other forms of understanding and organizing within our disciplinary field. So, how do we recover alternative rationalities, worldviews, and voices on the processes of organizing in diverse contexts?

text: Diverse voices and alternative rationalities: Imagining forms of postcolonial organizational communication In his exploration of nationalism and imagined communities, Anderson (1991) claims that nations are “imagined” (that is, they are constructions), insomuch that people are convinced of the comradeship of unknown fellow compatriots, often ignoring any actual inequality and exploitation that exists in such an imagined community. In a similar fashion, we argue that the subdiscipline or community of organizational communication scholars is also imagined, as much organizational communication scholarship conducted within the global context is performed and interpreted from the dominant Euro-American intellectual tradition, privileging those concepts as well as particular voices and traditions and often ignoring inequality and exploitation within the scholarly community. This forgetting and the imagined scholarly community it creates continue to reify and legitimate a particular form of rationality and, in practice, lead to further colonization, subordination, and oppression of native/indigenous/other forms of understanding and organizing within our disciplinary field. So, how do we recover alternative rationalities, worldviews, and voices on the processes of organizing in diverse contexts?

year: 2007

title: Water relations and carbon dioxide exchange of epiphytic lichens in the Namib fog desert

authors: Lange, Otto L.

subjects: dew

abstract: Although there is only negligible rainfall, frequent nocturnal fog, dew and high air humidity support a luxurious lichen vegetation in the coastal zone of the central NamibDesert (Namibia). In earlier publications, we have studied ecophysiological performance of a series of epilithic and terrestrial lichens. Here, we have extended this work to three epiphytic species (Heterodermia namaquana, Ramalina lacera, and Xanthoria turbinata) that inhabit the sparse perennial shrubs growing in this area. Our intention, monitoring lichen CO₂ exchange, their waterrelations and microclimate conditions, was to determine the functional mechanisms that allow these epiphytes to exist under the special conditions of a fogdesert. Measurements were conducted mainly during the spring season.
The epiphyticlichens showed response patterns very similar to the epilithic and epigaeic species at the same site. Their metabolism was activated through moistening by dew and/or fog during the night and, in the very early morning, they exhibited the typical brief peak of net photosynthesis (NP) between sunrise and desiccation. The thalli were almost completely dry for the remainder of the day. Average duration of the positive NP during the morning peak was about 3 h. Dew condensation, alone, resulted in activation that provided 58–63% of integrated carbon income (ΣNP) as compared to fog (plus dew). In the late afternoon, there was a tendency for hydration to increase again, due to water vapour uptake at higher air humidity, and this allowed on some days a brief additional period of very low rates of photosynthesis shortly before sunset.
Light response of photosynthesis showed “sun-plant” characteristics with saturation around 1000 μmol m⁻² s⁻¹ photosynthetically active photon flux density (PPFD). Light compensation point (LCP) of CO2exchange after sunrise was highly dependent on actual water content (WC) for X. turbinata: at low hydration it was ca. 10 μmol m⁻² s⁻¹ PPFD whilst, at high WC, it was almost 80 μmol m⁻² s⁻¹ PPFD. In contrast, LCP of R. lacera was almost independent of WC. This phenomenon was probably due to differences in thallus structure.
Maximal attained NP and daily ΣNP both showed a saturation-type response to previous maximal nocturnal WC. Neither parameter was increased substantially when higher maximal thallus WCs were produced by experimental moistening in the night. All three species, despite their different morphologies, performed optimally at the highest nocturnal moistening achieved by natural fog and were not able to make use of higher hydration.
The three studied epiphytes were similar in their chlorophyll-related rates of NP. Due to lower chlorophyll content, dry weight and carbon-related NP of X. turbinata was only about one-third of that of the other two species. The average carbon income on days with fog and/or dew hydration during the spring season amounted to 2.4 and 2.1 mgC (gC)⁻¹ day⁻¹ (related to thallus carbon content) for H. namaquana and R. lacera, respectively. This primary production was of similar magnitude to those found for the terrestrial species at the same site.

text: Water relations and carbon dioxide exchange of epiphytic lichens in the Namib fog desert Although there is only negligible rainfall, frequent nocturnal fog, dew and high air humidity support a luxurious lichen vegetation in the coastal zone of the central NamibDesert (Namibia). In earlier publications, we have studied ecophysiological performance of a series of epilithic and terrestrial lichens. Here, we have extended this work to three epiphytic species (Heterodermia namaquana, Ramalina lacera, and Xanthoria turbinata) that inhabit the sparse perennial shrubs growing in this area. Our intention, monitoring lichen CO₂ exchange, their waterrelations and microclimate conditions, was to determine the functional mechanisms that allow these epiphytes to exist under the special conditions of a fogdesert. Measurements were conducted mainly during the spring season.
The epiphyticlichens showed response patterns very similar to the epilithic and epigaeic species at the same site. Their metabolism was activated through moistening by dew and/or fog during the night and, in the very early morning, they exhibited the typical brief peak of net photosynthesis (NP) between sunrise and desiccation. The thalli were almost completely dry for the remainder of the day. Average duration of the positive NP during the morning peak was about 3 h. Dew condensation, alone, resulted in activation that provided 58–63% of integrated carbon income (ΣNP) as compared to fog (plus dew). In the late afternoon, there was a tendency for hydration to increase again, due to water vapour uptake at higher air humidity, and this allowed on some days a brief additional period of very low rates of photosynthesis shortly before sunset.
Light response of photosynthesis showed “sun-plant” characteristics with saturation around 1000 μmol m⁻² s⁻¹ photosynthetically active photon flux density (PPFD). Light compensation point (LCP) of CO2exchange after sunrise was highly dependent on actual water content (WC) for X. turbinata: at low hydration it was ca. 10 μmol m⁻² s⁻¹ PPFD whilst, at high WC, it was almost 80 μmol m⁻² s⁻¹ PPFD. In contrast, LCP of R. lacera was almost independent of WC. This phenomenon was probably due to differences in thallus structure.
Maximal attained NP and daily ΣNP both showed a saturation-type response to previous maximal nocturnal WC. Neither parameter was increased substantially when higher maximal thallus WCs were produced by experimental moistening in the night. All three species, despite their different morphologies, performed optimally at the highest nocturnal moistening achieved by natural fog and were not able to make use of higher hydration.
The three studied epiphytes were similar in their chlorophyll-related rates of NP. Due to lower chlorophyll content, dry weight and carbon-related NP of X. turbinata was only about one-third of that of the other two species. The average carbon income on days with fog and/or dew hydration during the spring season amounted to 2.4 and 2.1 mgC (gC)⁻¹ day⁻¹ (related to thallus carbon content) for H. namaquana and R. lacera, respectively. This primary production was of similar magnitude to those found for the terrestrial species at the same site.

year: 2007

title: An AR memory app based on Māori mnemonic aids

authors: Taia, Ivy

subjects: computer science

abstract: Traumatic Brain Injury (TBI) is a world-wide “silent epidemic” causing a variety of memory issues for those affected. Although several software approaches aim to aid memory recollection, they are inadequate for many TBI survivors and none address aspects of cultural awareness in New Zealand. We explored design concepts of traditional Māori cultural tools / techniques and how they helped Māori people recall past information. This paper describes our research and development of Maumahara Papahou, a mobile app that uses Augmented Reality features to create a digital memory treasure box based on the concepts of Māori mnemonic aids.

text: An AR memory app based on Māori mnemonic aids Traumatic Brain Injury (TBI) is a world-wide “silent epidemic” causing a variety of memory issues for those affected. Although several software approaches aim to aid memory recollection, they are inadequate for many TBI survivors and none address aspects of cultural awareness in New Zealand. We explored design concepts of traditional Māori cultural tools / techniques and how they helped Māori people recall past information. This paper describes our research and development of Maumahara Papahou, a mobile app that uses Augmented Reality features to create a digital memory treasure box based on the concepts of Māori mnemonic aids.

year: 2018