title: The measurement of knife sharpness and the impact of sharpening technique on edge durability

authors: Mulder, Joshua

abstract: We discuss the definition and measurement of knife sharpness. Using a commercial knife sharpness test system we identify a controlled cutting regime that progressively dulls blades, and use this to compare the durability of the edge on a modern knife sharpened with a commercial electrically-driven abrasive-belt knife sharpener with the same blade sharpened manually with a whetstone. Starting at similar sharpness levels we observe that the cold-sharpened edge is significantly more durable.

text: The measurement of knife sharpness and the impact of sharpening technique on edge durability We discuss the definition and measurement of knife sharpness. Using a commercial knife sharpness test system we identify a controlled cutting regime that progressively dulls blades, and use this to compare the durability of the edge on a modern knife sharpened with a commercial electrically-driven abrasive-belt knife sharpener with the same blade sharpened manually with a whetstone. Starting at similar sharpness levels we observe that the cold-sharpened edge is significantly more durable.

year: 2016

title: Carbon balance of an intensively grazed temperate pasture in two climatically contrasting years

authors: Mudge, Paul Lawrence

subjects: eddy covariance

abstract: Grazed grasslands occupy 26% of the earth's ice free land surface and are therefore an important component of the global C balance. In New Zealand, pastoral agriculture is the dominant land use and recent research has shown that soils under intensive dairy pastures have lost large amounts of carbon (∼1000 kg C ha⁻¹ y⁻¹) during the past few decades. The objective of this research was to determine the net ecosystem carbon balance (NECB) of an intensively grazed dairy pasture in New Zealand. Net ecosystem CO₂ exchange (NEE) was measured using an eddy covariance (EC) system from 1 January 2008 to 31 December 2009. Other C imports (feed) and exports (milk, methane, leaching, and harvested biomass) were calculated from farm production data and literature values. During 2008 there was a one in 100 year drought during summer/autumn, which was followed by a very wet winter. There were no prolonged periods of above or below average rainfall or soil moisture in 2009, but temperatures were consistently lower than 2008. The severe summer/autumn drought during 2008 caused a loss of CO₂ to the atmosphere, but annual NEE remained negative (a CO₂ sink, −1610 ± 500 kg C ha⁻¹), because CO₂ lost during the drought was regained during the winter and spring. The site was also a net CO₂ sink during 2009 despite the colder than usual conditions (−2290 ± 500 kg C ha⁻¹). Including C imports and exports in addition to CO₂ exchange revealed that the site was a C sink in both years, with a NECB of 590 ± 560 kg C ha⁻¹ in 2008, and 900 ± 560 kg C ha⁻¹ in 2009. The C sequestration found in this study is in agreement with most other Northern Hemisphere EC studies of grazed pastures on mineral soils, but is not consistent with the large C losses reported for soils under dairy pastures throughout New Zealand. In the current study (like many other EC studies) the influence of climatic conditions and management practices on the annual C balance was only semi-quantitatively assessed. An extended period of EC measurements combined with modelling is required to more accurately quantify the effect of different climatic conditions on the annual C balance, and the influence of different management practices needs to be quantified using specifically designed studies (such as paired EC towers), so that practices which minimise C losses and maximise C sequestration can be identified.

text: Carbon balance of an intensively grazed temperate pasture in two climatically contrasting years Grazed grasslands occupy 26% of the earth's ice free land surface and are therefore an important component of the global C balance. In New Zealand, pastoral agriculture is the dominant land use and recent research has shown that soils under intensive dairy pastures have lost large amounts of carbon (∼1000 kg C ha⁻¹ y⁻¹) during the past few decades. The objective of this research was to determine the net ecosystem carbon balance (NECB) of an intensively grazed dairy pasture in New Zealand. Net ecosystem CO₂ exchange (NEE) was measured using an eddy covariance (EC) system from 1 January 2008 to 31 December 2009. Other C imports (feed) and exports (milk, methane, leaching, and harvested biomass) were calculated from farm production data and literature values. During 2008 there was a one in 100 year drought during summer/autumn, which was followed by a very wet winter. There were no prolonged periods of above or below average rainfall or soil moisture in 2009, but temperatures were consistently lower than 2008. The severe summer/autumn drought during 2008 caused a loss of CO₂ to the atmosphere, but annual NEE remained negative (a CO₂ sink, −1610 ± 500 kg C ha⁻¹), because CO₂ lost during the drought was regained during the winter and spring. The site was also a net CO₂ sink during 2009 despite the colder than usual conditions (−2290 ± 500 kg C ha⁻¹). Including C imports and exports in addition to CO₂ exchange revealed that the site was a C sink in both years, with a NECB of 590 ± 560 kg C ha⁻¹ in 2008, and 900 ± 560 kg C ha⁻¹ in 2009. The C sequestration found in this study is in agreement with most other Northern Hemisphere EC studies of grazed pastures on mineral soils, but is not consistent with the large C losses reported for soils under dairy pastures throughout New Zealand. In the current study (like many other EC studies) the influence of climatic conditions and management practices on the annual C balance was only semi-quantitatively assessed. An extended period of EC measurements combined with modelling is required to more accurately quantify the effect of different climatic conditions on the annual C balance, and the influence of different management practices needs to be quantified using specifically designed studies (such as paired EC towers), so that practices which minimise C losses and maximise C sequestration can be identified.

year: 2011

title: Te kura o Ruatoki 1896 - 1979

authors: Williams, Kim Reina Reremoana

subjects: Ruatoki Native School

abstract: Ko tēnei tuhinga roa e kōrero ana mō te Kura o Ruatoki i roto i te rohe o te iwi o Tūhoe. I whakatūria he kura i te tau 1896 i runga i te inoi a ngā Koroua ki te Kāwanatanga o taua wā.
Hai te Upoko tuatahi, ka whakatakotoria ngā kōrero mō te āhua o te whenua, ngā tāngata me ā rātau nekeneke. Tutū ana te puehu i runga i ngā whakatū waewae ki te iwi, ki te Pākehā hoki mō taua whenua.
Hai te Upoko tuarua ka takoto ngā kōrero mō te heke o ngā pānui o ngā inoi, ngā reta a ngā Koroua ki te Kāwanatanga mō te whakatū i tētahi Kura i Ruatoki. Te nuinga o ēnei rauemi i rangahaua, i kitea, i te Whare pukapuka o Pōneke. Ko ētahi i te Whare pukapuka o Tāmaki. Ka tau te tono, ka kitea te tūtukitanga o te ao Pākehā ki te ao Māori, otirā, kua puta te kaupapa i whakatūria ake ai te kura hei whakatangata whenua i ngā tāngata, i ngā aronga hinengaro Māori kia rite ki tō te Pākehā.
Hai te Upoko tuatoru ka tirohia ko ngā tuhinga a ngā Tumuaki mai i te tau 1896 ki te tau 1979 mō te Kura o Ruatoki. Ka kite i roto i ā rātau tirohanga te āhua o tā rātau kaihautū i te rerenga o te kaupapa nei. Ko ngā kaihautū i te waka nei, he tūmau noa nā te Kāwanatanga hai whakatō i te Pākehātanga ki roto i te whatumanawa Māori.
He tini o te whārua i hinga i roto i ēnei tau i runga i ngā mate urutī, mate tauhou i pā ki roto i te whārua. Ahakoa tērā ka tukuna tonu ngā tamariki ki te kura i runga i te whakapono he oranga ka puta mai i reira. I te tau 1946 ka tū he kura tuarua, he Māori District High School. Ko te nuinga o ngā tamariki o Tawera rāua ko Ruatoki i haere mai ki tēnei kura. Tokoiti ia tau i whiwhi karahipi mō te haere ki ngā kura hāhi o Tīpene rāua ko Wikitōria. Tērā pea he tango atu i ēnei tamariki mai i ngā āhuatanga Māori o te whārua.
Hai te upoko tuawhā, ka whakakorehia te kura tuarua. Ko ngā take mō te katinga ka āta whakamāramahia. He mahi nanakia nā te tari Mātauranga me āna āpiha i runga i ngā nekeneke mō tēnei kaupapa.
Hai te Upoko tuarima ka whakarerekēhia ngā marautanga ako kia tau ko te kaupapa ako i roto i ngā reo e rua ki roto i te kura. He whakautu tēnei i te kōrero a Richard Benton o te N.Z.C.E.R e kī ana, "Kāore e roa ka ngaro te reo Māori." Koinei te wā i whakapihihia ake ai te kaupapa ako i roto i ngā reo e rua, ā, ka tiritiria ko te kaupapa Rumaki Reo.
Hai te Upoko tuaono ko te kōhuretanga o te kaupapa Māori me te puāwaitanga o ngā hinengaro me ngā wairua o ngā tamariki ki te āhua o te ako i ā rātau mahi i roto i tō rātau ake reo. I tīmatahia te kaupapa i te tau 1977. Tae rawa atu ki ngā tau o muri mai kua kitea kē te huringa o ngā ngākau ki te ako.
Hai te Upoko tuawhitu ka whakaatahia mai ngā whakanekeneke i raro i tēnei kaupapa. He nui ngā tutukitanga ki ngā ture i te whakatūtanga o ngā Kura mō Āpōpō.
Hei whakarāpopototanga i ngā moemoeā me ngā tūmanako ka titiro ake ki ngā waru tekau tau kua pahemo. Kua turuki ki te pō, ki te ao. Kua noho te pukenga o te kupu kōrero, kua taipū ngā kaupapa. Ko taku mahi he whakarārangi i ngā pikinga i ngā hekenga i ngā āhuatanga katoa i mahia i roto i tēnei kura mai kore ka kitea atu he māramatanga he huarahi rānei e tiketike ake ai ngā mahi ako, ngā akoranga, ki ēnei o ā tātau mokopuna o Ngāi Tūhoe e tipu mai nei. Nō reira ka hoki rawa ngā kauhau ki ērā i whakatakotohia mai e ngā mātua tīpuna. Ka tīkina atu te kōrero i reira hai whakatinana i ngā tūmanako mō te wharekura o Ruatoki i tēnei wā.

text: Te kura o Ruatoki 1896 - 1979 Ko tēnei tuhinga roa e kōrero ana mō te Kura o Ruatoki i roto i te rohe o te iwi o Tūhoe. I whakatūria he kura i te tau 1896 i runga i te inoi a ngā Koroua ki te Kāwanatanga o taua wā.
Hai te Upoko tuatahi, ka whakatakotoria ngā kōrero mō te āhua o te whenua, ngā tāngata me ā rātau nekeneke. Tutū ana te puehu i runga i ngā whakatū waewae ki te iwi, ki te Pākehā hoki mō taua whenua.
Hai te Upoko tuarua ka takoto ngā kōrero mō te heke o ngā pānui o ngā inoi, ngā reta a ngā Koroua ki te Kāwanatanga mō te whakatū i tētahi Kura i Ruatoki. Te nuinga o ēnei rauemi i rangahaua, i kitea, i te Whare pukapuka o Pōneke. Ko ētahi i te Whare pukapuka o Tāmaki. Ka tau te tono, ka kitea te tūtukitanga o te ao Pākehā ki te ao Māori, otirā, kua puta te kaupapa i whakatūria ake ai te kura hei whakatangata whenua i ngā tāngata, i ngā aronga hinengaro Māori kia rite ki tō te Pākehā.
Hai te Upoko tuatoru ka tirohia ko ngā tuhinga a ngā Tumuaki mai i te tau 1896 ki te tau 1979 mō te Kura o Ruatoki. Ka kite i roto i ā rātau tirohanga te āhua o tā rātau kaihautū i te rerenga o te kaupapa nei. Ko ngā kaihautū i te waka nei, he tūmau noa nā te Kāwanatanga hai whakatō i te Pākehātanga ki roto i te whatumanawa Māori.
He tini o te whārua i hinga i roto i ēnei tau i runga i ngā mate urutī, mate tauhou i pā ki roto i te whārua. Ahakoa tērā ka tukuna tonu ngā tamariki ki te kura i runga i te whakapono he oranga ka puta mai i reira. I te tau 1946 ka tū he kura tuarua, he Māori District High School. Ko te nuinga o ngā tamariki o Tawera rāua ko Ruatoki i haere mai ki tēnei kura. Tokoiti ia tau i whiwhi karahipi mō te haere ki ngā kura hāhi o Tīpene rāua ko Wikitōria. Tērā pea he tango atu i ēnei tamariki mai i ngā āhuatanga Māori o te whārua.
Hai te upoko tuawhā, ka whakakorehia te kura tuarua. Ko ngā take mō te katinga ka āta whakamāramahia. He mahi nanakia nā te tari Mātauranga me āna āpiha i runga i ngā nekeneke mō tēnei kaupapa.
Hai te Upoko tuarima ka whakarerekēhia ngā marautanga ako kia tau ko te kaupapa ako i roto i ngā reo e rua ki roto i te kura. He whakautu tēnei i te kōrero a Richard Benton o te N.Z.C.E.R e kī ana, "Kāore e roa ka ngaro te reo Māori." Koinei te wā i whakapihihia ake ai te kaupapa ako i roto i ngā reo e rua, ā, ka tiritiria ko te kaupapa Rumaki Reo.
Hai te Upoko tuaono ko te kōhuretanga o te kaupapa Māori me te puāwaitanga o ngā hinengaro me ngā wairua o ngā tamariki ki te āhua o te ako i ā rātau mahi i roto i tō rātau ake reo. I tīmatahia te kaupapa i te tau 1977. Tae rawa atu ki ngā tau o muri mai kua kitea kē te huringa o ngā ngākau ki te ako.
Hai te Upoko tuawhitu ka whakaatahia mai ngā whakanekeneke i raro i tēnei kaupapa. He nui ngā tutukitanga ki ngā ture i te whakatūtanga o ngā Kura mō Āpōpō.
Hei whakarāpopototanga i ngā moemoeā me ngā tūmanako ka titiro ake ki ngā waru tekau tau kua pahemo. Kua turuki ki te pō, ki te ao. Kua noho te pukenga o te kupu kōrero, kua taipū ngā kaupapa. Ko taku mahi he whakarārangi i ngā pikinga i ngā hekenga i ngā āhuatanga katoa i mahia i roto i tēnei kura mai kore ka kitea atu he māramatanga he huarahi rānei e tiketike ake ai ngā mahi ako, ngā akoranga, ki ēnei o ā tātau mokopuna o Ngāi Tūhoe e tipu mai nei. Nō reira ka hoki rawa ngā kauhau ki ērā i whakatakotohia mai e ngā mātua tīpuna. Ka tīkina atu te kōrero i reira hai whakatinana i ngā tūmanako mō te wharekura o Ruatoki i tēnei wā.

year: 1998