title: Acoustic tamper detection sensor with very low false alarm rate

authors: Muijlwijk, Lawrence

subjects: false alarms

abstract: We describe a device designed to detect interference (vandalism or tampering) by acoustic means. The design employs both a piezoelectric vibration transducer and a common microphone in a novel mechanical arrangement. In contrast to conventional acoustic sensors that simply respond to vibrations above a threshold, this design analyses the outputs of the two to trigger an alarm. The method confers a near-zero susceptibility to triggering by external loud noises. No complex calculations are required so that only a low-cost, embedded microcontroller is required and the whole sensor can be very cheap. Extreme sensitivity can be achieved with little risk of false alarms.

text: Acoustic tamper detection sensor with very low false alarm rate We describe a device designed to detect interference (vandalism or tampering) by acoustic means. The design employs both a piezoelectric vibration transducer and a common microphone in a novel mechanical arrangement. In contrast to conventional acoustic sensors that simply respond to vibrations above a threshold, this design analyses the outputs of the two to trigger an alarm. The method confers a near-zero susceptibility to triggering by external loud noises. No complex calculations are required so that only a low-cost, embedded microcontroller is required and the whole sensor can be very cheap. Extreme sensitivity can be achieved with little risk of false alarms.

year: 2008

title: Deriving and testing efficient estimates of WTP distributions in destination choice model

authors: Scarpa, Riccardo

subjects: mixed logit

abstract: Estimation of welfare measures is often a dominant driver in the empirical literature on nonmarket valuation. To this end, qualitative choice models based on random utility theory have been widely employed in outdoor recreation studies. A frequent goal of applied studies has been the estimation of welfare changes associated with site attribute changes at recreation sites in order to inform regulatory policy and resource management. We review the evolution of the methodology of random utility theory in this field with a focus on taste heterogeneity models and then focus on the recent proposal of specifying utility in the WTP-space (Train K, Weeks M (2005) Discrete choice models in preference space and willing-to-pay space. In: Scarpa R, Alberini A (eds) Applications of simulation methods in environmental and resource economics, chapter 1. Springer, Dordrecht, pp 1–16). Our empirical application is on outdoor alpine recreation data. We emphasize the efficiency and direct testing that using the maximum simulated likelihood estimator affords to practitioners using the WTP-space approach, and illustrate these with examples.

text: Deriving and testing efficient estimates of WTP distributions in destination choice model Estimation of welfare measures is often a dominant driver in the empirical literature on nonmarket valuation. To this end, qualitative choice models based on random utility theory have been widely employed in outdoor recreation studies. A frequent goal of applied studies has been the estimation of welfare changes associated with site attribute changes at recreation sites in order to inform regulatory policy and resource management. We review the evolution of the methodology of random utility theory in this field with a focus on taste heterogeneity models and then focus on the recent proposal of specifying utility in the WTP-space (Train K, Weeks M (2005) Discrete choice models in preference space and willing-to-pay space. In: Scarpa R, Alberini A (eds) Applications of simulation methods in environmental and resource economics, chapter 1. Springer, Dordrecht, pp 1–16). Our empirical application is on outdoor alpine recreation data. We emphasize the efficiency and direct testing that using the maximum simulated likelihood estimator affords to practitioners using the WTP-space approach, and illustrate these with examples.

year: 2009

title: Kei moenga - Tārā i te ārero. Lest it be severed from the tongue

authors: Bailey, Iraia Thompson

subjects: te reo Māori

abstract: Tūwharetoa are a distinctive tribal group who are located within the central North Island. With a proud and celebrated history, Tūwharetoa evolved through out time to become a complex and unique tribe, containing a number of sub tribes, each with its own authority, structure and land holdings. However, like all Māori, Tūwharetoa were greatly affected by the impact of European colonisation. In particular the unique language and customs of Tūwharetoa where savaged by the policy of assimilation and the introduction of a new language and its cultural beliefs. Presently the traditional language of Tūwharetoa is in a perilous state, and regardless of the many Māori language initiatives that have been established over the past few decades, the special language of Tūwharetoa is declining. This thesis is concerned with understanding the reasons why the traditional language of Tūwharetoa finds itself in this position, while also assessing the initatives implemented by Tūwharetoa to rectify this situation. Furthermore this study will look to create a possible pathway forward for Tūwharetoa to support the regeneration and revitalisation of the language. Ultimately this thesis will propose a framework bedded within language planning theory, supported by a kaupapa Māori research methodology and founded within the beliefs of Tūwharetoa, to see the return of te reo Māori as the main form of communication for the people of Tūwharetoa, and as a clear marker of our identity and uniqueness.

text: Kei moenga - Tārā i te ārero. Lest it be severed from the tongue Tūwharetoa are a distinctive tribal group who are located within the central North Island. With a proud and celebrated history, Tūwharetoa evolved through out time to become a complex and unique tribe, containing a number of sub tribes, each with its own authority, structure and land holdings. However, like all Māori, Tūwharetoa were greatly affected by the impact of European colonisation. In particular the unique language and customs of Tūwharetoa where savaged by the policy of assimilation and the introduction of a new language and its cultural beliefs. Presently the traditional language of Tūwharetoa is in a perilous state, and regardless of the many Māori language initiatives that have been established over the past few decades, the special language of Tūwharetoa is declining. This thesis is concerned with understanding the reasons why the traditional language of Tūwharetoa finds itself in this position, while also assessing the initatives implemented by Tūwharetoa to rectify this situation. Furthermore this study will look to create a possible pathway forward for Tūwharetoa to support the regeneration and revitalisation of the language. Ultimately this thesis will propose a framework bedded within language planning theory, supported by a kaupapa Māori research methodology and founded within the beliefs of Tūwharetoa, to see the return of te reo Māori as the main form of communication for the people of Tūwharetoa, and as a clear marker of our identity and uniqueness.

year: 2013