title: Performance and applications of Gallium-Nitride Monolithic Microwave Integrated Circuits (GaN MMICs)

authors: Scott, Jonathan B.

subjects: Gallium Nitride

abstract: The evolution of wide-bandgap semiconductor transistor technology is placed in historical context with other active device technologies. The relative rapidity of GaN transistor development is noted and is attributed to the great parallel activity in the lighting sector and the historical experience and business model from the III-V compound semiconductor sector. The physical performance expectations for wide-bandgap technologies such as Gallium-Nitride Field-E®ect Transistors (GaN FETs) are reviewed. We present some device characteristics.
Challenges met in characterising, and prospects for modeling GaN FETs are described. Reliability is identified as the final remaining hurdle facing would-be foundries. Evolutionary and unsurprising applications as well as novel and revolutionary applications are suggested. Novel applications include wholly monolithic switchmode power supplies, simplified tools for ablation and diathermy in tissue, and very wide dynamic range circuits for audio or low phase noise signal generation. We conclude that now is the time to embark on circuit design of
MMICs in wide-bandgap technology. The potential for fabless design groups to capitalise upon design IP without strong geopraphic advantage is noted.

text: Performance and applications of Gallium-Nitride Monolithic Microwave Integrated Circuits (GaN MMICs) The evolution of wide-bandgap semiconductor transistor technology is placed in historical context with other active device technologies. The relative rapidity of GaN transistor development is noted and is attributed to the great parallel activity in the lighting sector and the historical experience and business model from the III-V compound semiconductor sector. The physical performance expectations for wide-bandgap technologies such as Gallium-Nitride Field-E®ect Transistors (GaN FETs) are reviewed. We present some device characteristics.
Challenges met in characterising, and prospects for modeling GaN FETs are described. Reliability is identified as the final remaining hurdle facing would-be foundries. Evolutionary and unsurprising applications as well as novel and revolutionary applications are suggested. Novel applications include wholly monolithic switchmode power supplies, simplified tools for ablation and diathermy in tissue, and very wide dynamic range circuits for audio or low phase noise signal generation. We conclude that now is the time to embark on circuit design of
MMICs in wide-bandgap technology. The potential for fabless design groups to capitalise upon design IP without strong geopraphic advantage is noted.

year: 2007-12

title: Supervision in educational contexts: raising the stakes in a global world

authors: Cornforth, Sue

subjects: supervision

abstract: This paper brings together discourses surrounding two areas of supervision, educational and clinical, in order to address the increasing complexity of academic life. Educational supervision of postgraduate student researchers resonates with more clinical supervision practices. All are widely perceived as beneficial and promoted on ethical grounds. However, a comparison foregrounds supervision's problematic and questionable association with a neo-liberal economic agenda. Following a desire to speak the unspeakable in academic spaces, we apply a discursively informed critical analysis to describe supervision as an affluent, professional response to an increasingly restrictive individualism, which compounds the isolating function of an unsustainable regime. We explore the possibilities that supervisory practices offer as an organisational space in the domain of power, locating untapped potential in their ambivalence. We invite a radical revisioning of supervision as a platform that might have potential for an increasingly subversive and inclusive voice in higher education.

text: Supervision in educational contexts: raising the stakes in a global world This paper brings together discourses surrounding two areas of supervision, educational and clinical, in order to address the increasing complexity of academic life. Educational supervision of postgraduate student researchers resonates with more clinical supervision practices. All are widely perceived as beneficial and promoted on ethical grounds. However, a comparison foregrounds supervision's problematic and questionable association with a neo-liberal economic agenda. Following a desire to speak the unspeakable in academic spaces, we apply a discursively informed critical analysis to describe supervision as an affluent, professional response to an increasingly restrictive individualism, which compounds the isolating function of an unsustainable regime. We explore the possibilities that supervisory practices offer as an organisational space in the domain of power, locating untapped potential in their ambivalence. We invite a radical revisioning of supervision as a platform that might have potential for an increasingly subversive and inclusive voice in higher education.

year: 2008

title: Me tangi ki te hunga whakamomori?

authors: Roa, Raukura

subjects: Mate whakamomori

abstract: I runga o Tūrangawaewae Marae i te 19 Akuhata, 2011 i te rā kawe mate o te koroneihana o Kīngi Tuheitia, i whakatakotohia e Professor Pou Temara te urupounamu ‘ko te hunga whakamomori me tangi me aha rānei?’ Ko taku whakapae, ko te whakaaro pea o roto o tēnei pātai, e aro ana ki te hunga whakamomori. Heoi, ko te aronga kē pea o te kaupapa, ko tēnei mea te tangihanga. He whakapono nō te ao Māori, ko te tangihanga, he whakarangatira i te tūpāpaku me ngā mahi i oti i a ia i te wā o te ora. Heoi, ko tāku e uaparetia ana, ko te kawenga matua o te tangihanga, ko te aroha o te tangata ki te tangata. Ko ngā kaupapa o te tangihanga, tuatahi he tuku i te wairua ki te wāhi ngaro. Tuarua, he huarahi e tīngia ai e te Māori ngā panonitanga o te mate. Tuatoru, he hui e whai oranga ai te hunga ora. Nō reira ko taku paremata ki te pakirēhua a Professor Pou Temara, ae me tangi ki te hunga whakamomori ka tika. Ko te aronga o tēnei pepa he wānanga i ngā tuhituhinga kua puta kē ki te ao mā te wetewete i ngā kōrero mō te tangihanga, te mate, te rerenga o te wairua, te whakahaeretanga o te tangihanga, te whakamomori, me ngā whakapono o iwi kē mō te whakamomori.

text: Me tangi ki te hunga whakamomori? I runga o Tūrangawaewae Marae i te 19 Akuhata, 2011 i te rā kawe mate o te koroneihana o Kīngi Tuheitia, i whakatakotohia e Professor Pou Temara te urupounamu ‘ko te hunga whakamomori me tangi me aha rānei?’ Ko taku whakapae, ko te whakaaro pea o roto o tēnei pātai, e aro ana ki te hunga whakamomori. Heoi, ko te aronga kē pea o te kaupapa, ko tēnei mea te tangihanga. He whakapono nō te ao Māori, ko te tangihanga, he whakarangatira i te tūpāpaku me ngā mahi i oti i a ia i te wā o te ora. Heoi, ko tāku e uaparetia ana, ko te kawenga matua o te tangihanga, ko te aroha o te tangata ki te tangata. Ko ngā kaupapa o te tangihanga, tuatahi he tuku i te wairua ki te wāhi ngaro. Tuarua, he huarahi e tīngia ai e te Māori ngā panonitanga o te mate. Tuatoru, he hui e whai oranga ai te hunga ora. Nō reira ko taku paremata ki te pakirēhua a Professor Pou Temara, ae me tangi ki te hunga whakamomori ka tika. Ko te aronga o tēnei pepa he wānanga i ngā tuhituhinga kua puta kē ki te ao mā te wetewete i ngā kōrero mō te tangihanga, te mate, te rerenga o te wairua, te whakahaeretanga o te tangihanga, te whakamomori, me ngā whakapono o iwi kē mō te whakamomori.

year: 2012-05