title: Studies of transformation and particle-binding of resin acids during oxidative treatment of effluent from Two New Zealand pulp mills

authors: Kanber, S. A.

subjects: resin acid transformation

abstract: Reactor studies of aerobic degradation of effluent from the first and last ponds of the treatment system of two New Zealand pulp and paper mills indicated that filterable BOD5, resin acids and transformed resin acids, free and bound, degraded at similar rates. During oxidative treatment the resin acids of untreated effluent became increasingly bound to particulate material and a sediment high in abiet-13-enoic acid was formed.

text: Studies of transformation and particle-binding of resin acids during oxidative treatment of effluent from Two New Zealand pulp mills Reactor studies of aerobic degradation of effluent from the first and last ponds of the treatment system of two New Zealand pulp and paper mills indicated that filterable BOD5, resin acids and transformed resin acids, free and bound, degraded at similar rates. During oxidative treatment the resin acids of untreated effluent became increasingly bound to particulate material and a sediment high in abiet-13-enoic acid was formed.

year: 2008

title: Numerical calculation of series and shunt resistances and diode quality factor of a photovoltaic cell using the Lambert W-function

authors: Ghani, Faisal Abid

subjects: cell modelling

abstract: A number of methods currently exist to determine the modeling parameters of a solar cell. The authors presented in earlier a work a method to numerically determine the values of series and shunt resistance using the Lambert W-function at maximum power point primarily using data provided by the manufacturer. This method however assumes the diode constant value is known. An experimental investigation revealed that by setting the diode constant to unity as suggested in other work, a growing disparity between model output and experimental values would arise away from the maximum power point. To address this issue, a modification is proposed to the method of Ghani and Duke (2011) which permits the calculation of the diode constant and the corresponding values of series and shunt resistances. The method was experimentally validated by collecting the current-voltage characteristics of a multi-crystalline cell exposed to 800, 900, and 1000 W/m² of outdoor illumination in Hamilton, New Zealand. A comparative analysis of the model generated data using parameters found by the proposed method and two additional methods against experimental data revealed a significant reduction in the root mean square error over the entire current vector was obtained using the proposed method. The method is simple to apply and can be carried out using data provided the manufacturer.

text: Numerical calculation of series and shunt resistances and diode quality factor of a photovoltaic cell using the Lambert W-function A number of methods currently exist to determine the modeling parameters of a solar cell. The authors presented in earlier a work a method to numerically determine the values of series and shunt resistance using the Lambert W-function at maximum power point primarily using data provided by the manufacturer. This method however assumes the diode constant value is known. An experimental investigation revealed that by setting the diode constant to unity as suggested in other work, a growing disparity between model output and experimental values would arise away from the maximum power point. To address this issue, a modification is proposed to the method of Ghani and Duke (2011) which permits the calculation of the diode constant and the corresponding values of series and shunt resistances. The method was experimentally validated by collecting the current-voltage characteristics of a multi-crystalline cell exposed to 800, 900, and 1000 W/m² of outdoor illumination in Hamilton, New Zealand. A comparative analysis of the model generated data using parameters found by the proposed method and two additional methods against experimental data revealed a significant reduction in the root mean square error over the entire current vector was obtained using the proposed method. The method is simple to apply and can be carried out using data provided the manufacturer.

year: 2013

title: Ko ngā whakahokinga kōrero a te hunga uiui i roto i te akomanga rumaki i te Whare Wānanga o Waikato: He pūrongo mō ngā ui pātai

authors: Nock, Sophie

subjects: Reo Māori

abstract: Ko te whāinga matua o tēnei rangahau he whakakaokao, he wetewete āno hoki i ngā whakahokinga kōrero a te hunga uiui i kake atu ai ki runga i te waka o Te Tohu Paetahi i te tau 2008, i raro i te kōawa o Rehutai, i raro anō hoki i te maru o Te Whare Wānanga o Waikato. Ka aro atu ki ngā urupare a te hunga tekau mā ono mō te kaupapa nei o Te Tohu Paetahi, ka mutu, ka matapakihia ngā kōrero me ngā whakaaro o taua hunga kia āta kitea ai, āe rānei e tika ana te whakahaere, te mahi whakaako i te reo, te tautoko mai hoki a ngā kaiwhakaako me te kura. I te mutunga iho tautoko katoa te hunga uiui ki aua mea katoa.

text: Ko ngā whakahokinga kōrero a te hunga uiui i roto i te akomanga rumaki i te Whare Wānanga o Waikato: He pūrongo mō ngā ui pātai Ko te whāinga matua o tēnei rangahau he whakakaokao, he wetewete āno hoki i ngā whakahokinga kōrero a te hunga uiui i kake atu ai ki runga i te waka o Te Tohu Paetahi i te tau 2008, i raro i te kōawa o Rehutai, i raro anō hoki i te maru o Te Whare Wānanga o Waikato. Ka aro atu ki ngā urupare a te hunga tekau mā ono mō te kaupapa nei o Te Tohu Paetahi, ka mutu, ka matapakihia ngā kōrero me ngā whakaaro o taua hunga kia āta kitea ai, āe rānei e tika ana te whakahaere, te mahi whakaako i te reo, te tautoko mai hoki a ngā kaiwhakaako me te kura. I te mutunga iho tautoko katoa te hunga uiui ki aua mea katoa.

year: 2017