title: Water flow between Ohau Channel and Lake Rotoiti following implementation of a diversion wall.

authors: Hamilton, David P.

subjects: New Zealand

abstract: The water quality in Lake Rotoiti has become increasingly degraded since the 1950s. Water from Lake Rotorua, with elevated phytoplankton and nutrient concentrations, has entered Lake Rotoiti via the Ohau Channel. To help improve water quality in Lake Rotoiti, a constructed wall was completed in July 2008, to divert water from the Ohau Channel towards Okere Arm in Lake Rotoiti, with the objective to transport this water into the Kaituna Rivr instead of entering the main basin of Lake Rotoiti. This report has been produced in response to a request from the Rotorua Lake Technical Advisory Group to determine water velocities in the region of the constructed wall, in order to consider the effectiveness of the diversion.

text: Water flow between Ohau Channel and Lake Rotoiti following implementation of a diversion wall. The water quality in Lake Rotoiti has become increasingly degraded since the 1950s. Water from Lake Rotorua, with elevated phytoplankton and nutrient concentrations, has entered Lake Rotoiti via the Ohau Channel. To help improve water quality in Lake Rotoiti, a constructed wall was completed in July 2008, to divert water from the Ohau Channel towards Okere Arm in Lake Rotoiti, with the objective to transport this water into the Kaituna Rivr instead of entering the main basin of Lake Rotoiti. This report has been produced in response to a request from the Rotorua Lake Technical Advisory Group to determine water velocities in the region of the constructed wall, in order to consider the effectiveness of the diversion.

year: 2009

title: Dynamic Nonlinear Resistance Model for a Power MOSFET in an Oscillatory RLC Circuit

authors: Raju, S

abstract: This paper presents the development of a new Matlab mosfet model specifically designed for RLC circuits. The key contribution is the formulation of a novel equation that accurately captures the device behavior across subthreshold, above-threshold regions and at threshold point, addressing limitations in existing models. The developed model treats the mosfet as a variable resistance element, with the resistance changing dynamically at each instant, enabling the solution of differential equations governing the RLC circuit. Curve fitting and refinement were conducted based on experimental results, leading to a close match between the simulations and experimental data. The model was tested with triangle, sinusoidal and quadrilateral gate voltages, and the simulation results show good match with the experimental data, demonstrating the model's accuracy. It provides a straightforward way to predict performance, making it easier to refine and optimize the design gate voltage before physical implementation. This work provides a solid foundation for mosfet modeling in oscillatory RLC circuits, which can be applied to a wide range of power electronics applications.

text: Dynamic Nonlinear Resistance Model for a Power MOSFET in an Oscillatory RLC Circuit This paper presents the development of a new Matlab mosfet model specifically designed for RLC circuits. The key contribution is the formulation of a novel equation that accurately captures the device behavior across subthreshold, above-threshold regions and at threshold point, addressing limitations in existing models. The developed model treats the mosfet as a variable resistance element, with the resistance changing dynamically at each instant, enabling the solution of differential equations governing the RLC circuit. Curve fitting and refinement were conducted based on experimental results, leading to a close match between the simulations and experimental data. The model was tested with triangle, sinusoidal and quadrilateral gate voltages, and the simulation results show good match with the experimental data, demonstrating the model's accuracy. It provides a straightforward way to predict performance, making it easier to refine and optimize the design gate voltage before physical implementation. This work provides a solid foundation for mosfet modeling in oscillatory RLC circuits, which can be applied to a wide range of power electronics applications.

year: 2025

title: Imagining our own approaches

authors: Smith, Linda Tuhiwai

abstract: I spent some formative years of my life either in the back of museums or their basements helping my father, a scholar of Māori Studies, and keeping myself out of trouble. In the late 1960s I had one small job in the library basement of the Peabody Museum in Salem, Massachusetts, typing new labels for the captains’ log books of ships that were sailing during the American Revolution. I read most of those journals that consisted of pages and pages of wind directions with the rare glimpse of an encounter with another ship or a list of supplies. Why were we there in Salem when we came from Aotearoa, New Zealand? We were there because Salem was the home base for ships that sailed into the Pacific and returned home with collections of materials from the various Pacific Islands countries they visited. My father was studying elaborately carved items from the Marquesa Islands that looked very much like Māori designs.

text: Imagining our own approaches I spent some formative years of my life either in the back of museums or their basements helping my father, a scholar of Māori Studies, and keeping myself out of trouble. In the late 1960s I had one small job in the library basement of the Peabody Museum in Salem, Massachusetts, typing new labels for the captains’ log books of ships that were sailing during the American Revolution. I read most of those journals that consisted of pages and pages of wind directions with the rare glimpse of an encounter with another ship or a list of supplies. Why were we there in Salem when we came from Aotearoa, New Zealand? We were there because Salem was the home base for ships that sailed into the Pacific and returned home with collections of materials from the various Pacific Islands countries they visited. My father was studying elaborately carved items from the Marquesa Islands that looked very much like Māori designs.

year: 2015