title: Modeling sunspot and starspot decay by turbulent erosion

authors: Litvinenko, Yuri E.

subjects: diffusion

abstract: Disintegration of sunspots (and starspots) by fluxtube erosion, originally proposed by Simon and Leighton, is considered. A moving boundary problem is formulated for a nonlinear diffusion equation that describes the sunspot magnetic field profile. Explicit expressions for the sunspot decay rate and lifetime by turbulent erosion are derived analytically and verified numerically. A parabolic decay law for the sunspot area is obtained. For moderate sunspot magnetic field strengths, the predicted decay rate agrees with the results obtained by Petrovay and Moreno-Insertis. The new analytical and numerical solutions significantly improve the quantitative description of sunspot and starspot decay by turbulent erosion.

text: Modeling sunspot and starspot decay by turbulent erosion Disintegration of sunspots (and starspots) by fluxtube erosion, originally proposed by Simon and Leighton, is considered. A moving boundary problem is formulated for a nonlinear diffusion equation that describes the sunspot magnetic field profile. Explicit expressions for the sunspot decay rate and lifetime by turbulent erosion are derived analytically and verified numerically. A parabolic decay law for the sunspot area is obtained. For moderate sunspot magnetic field strengths, the predicted decay rate agrees with the results obtained by Petrovay and Moreno-Insertis. The new analytical and numerical solutions significantly improve the quantitative description of sunspot and starspot decay by turbulent erosion.

year: 2015-02-20

title: An Investigation of Parents' and Children's Perceptions of Applying "Orff-Schulwerk" Approaches to Children's Private Piano Lessons

authors: Christie, Wendy

abstract: In recent years, Orff-Schulwerk has experienced rapid and widespread acclaim as a holistic and inclusive approach to music education.  Yet, despite its success in classroom music education programmes, limited attention has been given to the potential of such approach to be applied to individual instrumental lessons.  More importantly, little consideration has been given to children’s and parents’ perspectives of learning their instrument through an Orff Schulwerk approach.  This research seeks to respond to these gaps by investigating children’s and parents’ perceptions of applying Orff-Schulwerk principles to individual piano instruction.  An instrumental case study was used to examine the perceptions of seven children who were taught Orff-Schulwerk principles alongside their individual piano lessons over an eight week period.  In addition, parents’ perceptions were also examined.  The findings revealed that both children and parents perceived the Orff-Schulwerk approach to enhance their creativity, musicianship and awareness of ensemble playing.  However, it was also found that parents’ preconceived beliefs and agendas for engaging their child in instrumental lessons were a barrier to accepting Orff-Schulwerk as a viable and powerful form of music education.  This study demonstrates the potential of applying Orff-Schulwerk methodologies to individual instrumental instruction and also highlights the need for further research to consider the voices and perspectives of parents and children.

text: An Investigation of Parents' and Children's Perceptions of Applying "Orff-Schulwerk" Approaches to Children's Private Piano Lessons In recent years, Orff-Schulwerk has experienced rapid and widespread acclaim as a holistic and inclusive approach to music education.  Yet, despite its success in classroom music education programmes, limited attention has been given to the potential of such approach to be applied to individual instrumental lessons.  More importantly, little consideration has been given to children’s and parents’ perspectives of learning their instrument through an Orff Schulwerk approach.  This research seeks to respond to these gaps by investigating children’s and parents’ perceptions of applying Orff-Schulwerk principles to individual piano instruction.  An instrumental case study was used to examine the perceptions of seven children who were taught Orff-Schulwerk principles alongside their individual piano lessons over an eight week period.  In addition, parents’ perceptions were also examined.  The findings revealed that both children and parents perceived the Orff-Schulwerk approach to enhance their creativity, musicianship and awareness of ensemble playing.  However, it was also found that parents’ preconceived beliefs and agendas for engaging their child in instrumental lessons were a barrier to accepting Orff-Schulwerk as a viable and powerful form of music education.  This study demonstrates the potential of applying Orff-Schulwerk methodologies to individual instrumental instruction and also highlights the need for further research to consider the voices and perspectives of parents and children.

year: 2018

title: Te whakatipu torekaihuruhuru hai ika-ā-Whiro

authors: Temara, Pou

subjects: Mana tūpuna

abstract: Kai roto i te mōteatea a Hone Tūwhare e mau ana ngā whakaaro me ngā kareāroto o tōku whakatipuranga o Tūhoe i te turakitanga a Mate i te tipua nei i a Te Rangihau i te tau 1987.  Mōwai ana te whenua, takarerewa ana te tangata. He atua te rite o Te Rangihau ki a Tūhoe. Ka kitea ia i ngā marae o Tūhoe, ka hikina te ngoi o te iwi, ka ora. Kua mate nei, tārū ana te iwi; kua hinga te rākau taumatua o ngā manu, kua hinga i te tao o te mate.

Kāore hoki i roa i muri mai o tōna wehenga atu ka whai muri ko tōna rēanga me tōna momo. Mā wai e ārahi te iwi? Mā wai e whakatika te waka ka tikoki, te iwi ka hē? Mā wai o tō mātau whakatipuranga e whakakīkī ngā whāruarua kua mahue mai nei i te ngaronga atu o tērā whakatipuranga taioreore? Koinei ngā mōhio o Tūhoe, he mana te kupu, he tapu te kōrero! Ahakoa i noho rātau ki te ako i a mātau mō te wā e ngaro ai tō rātau momo, tāupetia ana mātau e te mokemoke, he manu mahue i te kātua te rite. Ae, i reira anō ngā torekaihuruhuru e whakatore ana, engari kīhai i a rātau te mana tohunga o te rēanga ka ngaro.

text: Te whakatipu torekaihuruhuru hai ika-ā-Whiro Kai roto i te mōteatea a Hone Tūwhare e mau ana ngā whakaaro me ngā kareāroto o tōku whakatipuranga o Tūhoe i te turakitanga a Mate i te tipua nei i a Te Rangihau i te tau 1987.  Mōwai ana te whenua, takarerewa ana te tangata. He atua te rite o Te Rangihau ki a Tūhoe. Ka kitea ia i ngā marae o Tūhoe, ka hikina te ngoi o te iwi, ka ora. Kua mate nei, tārū ana te iwi; kua hinga te rākau taumatua o ngā manu, kua hinga i te tao o te mate.

Kāore hoki i roa i muri mai o tōna wehenga atu ka whai muri ko tōna rēanga me tōna momo. Mā wai e ārahi te iwi? Mā wai e whakatika te waka ka tikoki, te iwi ka hē? Mā wai o tō mātau whakatipuranga e whakakīkī ngā whāruarua kua mahue mai nei i te ngaronga atu o tērā whakatipuranga taioreore? Koinei ngā mōhio o Tūhoe, he mana te kupu, he tapu te kōrero! Ahakoa i noho rātau ki te ako i a mātau mō te wā e ngaro ai tō rātau momo, tāupetia ana mātau e te mokemoke, he manu mahue i te kātua te rite. Ae, i reira anō ngā torekaihuruhuru e whakatore ana, engari kīhai i a rātau te mana tohunga o te rēanga ka ngaro.

year: 2016