title: Wireless power and network synchronisation for agricultural and industrial remote sensors using low voltage CMOS Harvesting and Data Demodulator IC

authors: Lee, T.

abstract: This paper presents a wide area medium frequency loosely coupled magnetic energy harvesting system with power delivery and network synchronisation for remote sensors, intended for agricultural and industrial environments. Intended for situations with poor service access, power is supplied from a source via a large area loop. Receiver nodes may use ferrite cored coils for good efficiency with modest volume. Transmission of low bandwidth network synchronisation data permits very low operational duty cycle with the need for real time clocks or wake up receivers and their associated power drain. As a key enabler for the system, a full custom energy harvester and QPSK data demodulator IC has been designed and fabricated in a commercial 180nm CMOS technology. The IC occupies 0.54mm2 and can deliver 10.3µW at 3V to an external battery or capacitor. With standard MOS device thresholds the rectifier can start from cold with only 250mV peak from the antenna loop, and the battery charge output is delivered with 330mV peak input. Results are presented from laboratory evaluation and from preliminary measurements in the field with a 10m x 10m loop driven at 800kHz.

text: Wireless power and network synchronisation for agricultural and industrial remote sensors using low voltage CMOS Harvesting and Data Demodulator IC This paper presents a wide area medium frequency loosely coupled magnetic energy harvesting system with power delivery and network synchronisation for remote sensors, intended for agricultural and industrial environments. Intended for situations with poor service access, power is supplied from a source via a large area loop. Receiver nodes may use ferrite cored coils for good efficiency with modest volume. Transmission of low bandwidth network synchronisation data permits very low operational duty cycle with the need for real time clocks or wake up receivers and their associated power drain. As a key enabler for the system, a full custom energy harvester and QPSK data demodulator IC has been designed and fabricated in a commercial 180nm CMOS technology. The IC occupies 0.54mm2 and can deliver 10.3µW at 3V to an external battery or capacitor. With standard MOS device thresholds the rectifier can start from cold with only 250mV peak from the antenna loop, and the battery charge output is delivered with 330mV peak input. Results are presented from laboratory evaluation and from preliminary measurements in the field with a 10m x 10m loop driven at 800kHz.

year: 2016

title: The government's dismantling of climate laws breaks years of cross-party agreement

authors: Barton, Barry

subjects: climate change

abstract: Just as world leaders gather for this year’s COP30 climate summit in Brazil, the government’s announcement of its intention to significantly change New Zealand’s climate change law upends years of cross-party consensus.

All of the proposals pose serious problems, but the change to the zero-carbon provisions in the Climate Change Response Act 2002 runs counter to the underlying purpose of the act to provide accountability for climate change policy.

The government proposes to simplify emissions reduction plans, which are produced every five years to set out policies and strategies to decarbonise every sector of the economy.

It also wants to remove the Climate Change Commission’s role in providing independent advice on emissions reduction plans, and allow more frequent revisions of these plans without public consultation. The changes would also adjust timelines for emissions budgets and reports, and relax deadlines for the government’s response.

text: The government's dismantling of climate laws breaks years of cross-party agreement Just as world leaders gather for this year’s COP30 climate summit in Brazil, the government’s announcement of its intention to significantly change New Zealand’s climate change law upends years of cross-party consensus.

All of the proposals pose serious problems, but the change to the zero-carbon provisions in the Climate Change Response Act 2002 runs counter to the underlying purpose of the act to provide accountability for climate change policy.

The government proposes to simplify emissions reduction plans, which are produced every five years to set out policies and strategies to decarbonise every sector of the economy.

It also wants to remove the Climate Change Commission’s role in providing independent advice on emissions reduction plans, and allow more frequent revisions of these plans without public consultation. The changes would also adjust timelines for emissions budgets and reports, and relax deadlines for the government’s response.

year: 2025

title: The discovery of the Waiorongomai goldfield in 1881

authors: Hart, Philip

abstract: The first reports of gold being found in the vicinity of the Waiorongomai Stream were made in early November 1880, and after the opening of the goldfield a small rush took place to this part of the mountain. The first claims were pegged out in December and the following January, encouraged by some gold being found, but few claims were registered, for most prospectors were quickly disappointed. Prospecting was difficult because of the rugged terrain and heavy bush, and interest quickly faded.
Then, in early October, Hone Werahiko announced his latest and best find and provided samples of payable ore taken from a large reef. Immense excitement ensued, as this was the first payable reef to be found, and after Werahiko led miners on an exhausting trip to his ‘New Find’ a rush set in and many claims were pegged out. The first official to inspect the ground anticipated that the reefs could be easily worked, once an access track was constructed. The small settlement of Te Aroha was revived because a real goldfield had been found, at last.

text: The discovery of the Waiorongomai goldfield in 1881 The first reports of gold being found in the vicinity of the Waiorongomai Stream were made in early November 1880, and after the opening of the goldfield a small rush took place to this part of the mountain. The first claims were pegged out in December and the following January, encouraged by some gold being found, but few claims were registered, for most prospectors were quickly disappointed. Prospecting was difficult because of the rugged terrain and heavy bush, and interest quickly faded.
Then, in early October, Hone Werahiko announced his latest and best find and provided samples of payable ore taken from a large reef. Immense excitement ensued, as this was the first payable reef to be found, and after Werahiko led miners on an exhausting trip to his ‘New Find’ a rush set in and many claims were pegged out. The first official to inspect the ground anticipated that the reefs could be easily worked, once an access track was constructed. The small settlement of Te Aroha was revived because a real goldfield had been found, at last.

year: 2016