title: Signal processing for melody transcription

authors: McNab, Rodger J.

subjects: computer science

abstract: MT is a melody transcription system that accepts acoustic input, typically sung by the user, and displays it in standard music notation. It tracks the pitch of the input and segments the pitch stream into musical notes, which are labelled by their pitches relative to a reference frequency that adapts to the user's tuning. This paper describes the signal processing operations involved, and discusses two applications that have been prototyped: a sightsinging tutor and a scheme for acoustically indexing a melody database.

text: Signal processing for melody transcription MT is a melody transcription system that accepts acoustic input, typically sung by the user, and displays it in standard music notation. It tracks the pitch of the input and segments the pitch stream into musical notes, which are labelled by their pitches relative to a reference frequency that adapts to the user's tuning. This paper describes the signal processing operations involved, and discusses two applications that have been prototyped: a sightsinging tutor and a scheme for acoustically indexing a melody database.

year: 1995-08

title: Correlations between MO Eigenvectors and the Thermochemistry of Simple Organic Molecules, Related to Empirical Bond Additivity Schemes

authors: Lee, Matthew Colin John

subjects: MOs

abstract: A bondingness term is further developed to aid in heat of formation (ΔfHº) calculations for C, N, O and S containing molecules. Bondingness originated from qualitative investigations into the antibonding effect in the occupied MOs of ethane. Previous work used a single parameter for bondingness to calculate ΔfHº in an alkane homologous series using an additivity scheme. This work modifies the bondingness algorithm and uses the term to parameterise a test group of 345 molecules consisting of 17 subgroups that include alkanes, alkenes, alkynes, alcohols, ethers, aldehydes, ketones, carboxylic acids, esters, amines, amides, diazenes, nitriles, nitroalkanes, nitrates, thiols and benzenoids. Comparing experimental with calculated ΔfHº values, a standard deviation for the residuals of 6.3 kJ mol 1 can be achieved using bondingness with a simple steric repulsion term (SSR) in a bond additivity scheme, and a standard deviation of 5.2 kJ mol 1 can be achieved using a Lennard-Jones potential. The method is compared with the group method of Pedley, which for a slightly smaller set of 338 molecules, a subset of the test set of 345 molecules, gives a standard deviation of 7.0 kJ mol 1.

Bondingness, along with SSR or a Lennard-Jones potential, is parameterised in the lowest level of ab initio (HF-SCF) or semiempirical quantum chemical calculations. It therefore may be useful in determining the ΔfHº values for the largest molecules that are amenable to quantum chemical calculation.

As part of our analysis we calculated the difference between the lowest energy conformer and the average energy of a mixture populated with higher energy conformers. This is the difference between the experimental ΔfHº value and the ΔfHº calculated for a single conformer. Example calculations which we have followed are given by Dale and Eliel et al.. Dale calculates the energy difference for molecules as large as hexane using relative energies based on the number of 1,4 gauche interactions. We have updated these values with constant increments ascertained by Klauda et al. as well as ab initio MP2 cc-pVDZ relative energies and have included calculations for heptane and octane.

text: Correlations between MO Eigenvectors and the Thermochemistry of Simple Organic Molecules, Related to Empirical Bond Additivity Schemes A bondingness term is further developed to aid in heat of formation (ΔfHº) calculations for C, N, O and S containing molecules. Bondingness originated from qualitative investigations into the antibonding effect in the occupied MOs of ethane. Previous work used a single parameter for bondingness to calculate ΔfHº in an alkane homologous series using an additivity scheme. This work modifies the bondingness algorithm and uses the term to parameterise a test group of 345 molecules consisting of 17 subgroups that include alkanes, alkenes, alkynes, alcohols, ethers, aldehydes, ketones, carboxylic acids, esters, amines, amides, diazenes, nitriles, nitroalkanes, nitrates, thiols and benzenoids. Comparing experimental with calculated ΔfHº values, a standard deviation for the residuals of 6.3 kJ mol 1 can be achieved using bondingness with a simple steric repulsion term (SSR) in a bond additivity scheme, and a standard deviation of 5.2 kJ mol 1 can be achieved using a Lennard-Jones potential. The method is compared with the group method of Pedley, which for a slightly smaller set of 338 molecules, a subset of the test set of 345 molecules, gives a standard deviation of 7.0 kJ mol 1.

Bondingness, along with SSR or a Lennard-Jones potential, is parameterised in the lowest level of ab initio (HF-SCF) or semiempirical quantum chemical calculations. It therefore may be useful in determining the ΔfHº values for the largest molecules that are amenable to quantum chemical calculation.

As part of our analysis we calculated the difference between the lowest energy conformer and the average energy of a mixture populated with higher energy conformers. This is the difference between the experimental ΔfHº value and the ΔfHº calculated for a single conformer. Example calculations which we have followed are given by Dale and Eliel et al.. Dale calculates the energy difference for molecules as large as hexane using relative energies based on the number of 1,4 gauche interactions. We have updated these values with constant increments ascertained by Klauda et al. as well as ab initio MP2 cc-pVDZ relative energies and have included calculations for heptane and octane.

year: 2008

title: Talking About Race and Positionality in Psychology: Asians as Tangata Tiriti

authors: Tan, Kyle K. H.

subjects: tangata whenua

abstract: The article discusses the dominance of Western, educated, industrialized, rich, and democratic (WEIRD) perspectives in the field of psychology in Aotearoa New Zealand. This has resulted in a racial hierarchy of knowledge, with Indigenous and culturally diverse epistemologies marginalized. The lack of diversity in the curriculum and the limited representation of non-Pākehā (non-New Zealand European) psychologists in the country have led to calls for a more inclusive environment.

The first perspective proposed is to understand Asians as a racialized group with diverse experiences. Asians in Aotearoa come from various backgrounds and face different degrees of racism and acculturation. The notion of 'Asian' may be used to marginalize the interests of Māori, perpetuating institutional racism. The concept of 'Asianisations' describes different forms of racial marginalization experienced by Asians in the country.

The second perspective emphasizes the positionality of Asians as tangata Tiriti (people of the Treaty). Te Tiriti o Waitangi, the Treaty between the British Crown and Māori chiefs, is seen as granting tangata Tiriti equal rights and privileges alongside Pākehā and Māori. As tangata Tiriti, Asians have a responsibility to uphold Tiriti principles, which include partnership, active protection, equity, and options to address Māori inequities. Asian psychologists can engage in culturally safe care for Māori clients and collaborate with and empower Māori leadership in research.

The article highlights the need for Asian psychologists to reflect on their positionality, power structures, and biases within the discipline and society. It encourages them to challenge the dominance of WEIRD psychology and work towards decolonizing the field. By doing so, they can contribute to the flourishing of Kaupapa Māori psychology and develop culturally informed practices that draw on the richness of Asian cultures.

text: Talking About Race and Positionality in Psychology: Asians as Tangata Tiriti The article discusses the dominance of Western, educated, industrialized, rich, and democratic (WEIRD) perspectives in the field of psychology in Aotearoa New Zealand. This has resulted in a racial hierarchy of knowledge, with Indigenous and culturally diverse epistemologies marginalized. The lack of diversity in the curriculum and the limited representation of non-Pākehā (non-New Zealand European) psychologists in the country have led to calls for a more inclusive environment.

The first perspective proposed is to understand Asians as a racialized group with diverse experiences. Asians in Aotearoa come from various backgrounds and face different degrees of racism and acculturation. The notion of 'Asian' may be used to marginalize the interests of Māori, perpetuating institutional racism. The concept of 'Asianisations' describes different forms of racial marginalization experienced by Asians in the country.

The second perspective emphasizes the positionality of Asians as tangata Tiriti (people of the Treaty). Te Tiriti o Waitangi, the Treaty between the British Crown and Māori chiefs, is seen as granting tangata Tiriti equal rights and privileges alongside Pākehā and Māori. As tangata Tiriti, Asians have a responsibility to uphold Tiriti principles, which include partnership, active protection, equity, and options to address Māori inequities. Asian psychologists can engage in culturally safe care for Māori clients and collaborate with and empower Māori leadership in research.

The article highlights the need for Asian psychologists to reflect on their positionality, power structures, and biases within the discipline and society. It encourages them to challenge the dominance of WEIRD psychology and work towards decolonizing the field. By doing so, they can contribute to the flourishing of Kaupapa Māori psychology and develop culturally informed practices that draw on the richness of Asian cultures.

year: 2023-07-24