title: Domain specific transfer learning using image mixing and stochastic image selection

authors: Coup, Sheldon

subjects: computer science

abstract: Can a gradual transition from the source to the target dataset improve knowledge transfer when fine-tuning a convolutional neural network to a new domain? Can we use training examples from general image datasets to improve classification on fine-grained datasets? We present two image similarity metrics and two methods for progressively transitioning from the source dataset to the target dataset when fine-tuning to a new domain. Preliminary results, using the Flowers 102 dataset, show that the first proposed method, stochastic domain subset training, gives an improvement in classification accuracy compared to standard fine-tuning, for one of the two similarity metrics. However, the second method, continuous domain subset training, results in a reduction in classification performance.

text: Domain specific transfer learning using image mixing and stochastic image selection Can a gradual transition from the source to the target dataset improve knowledge transfer when fine-tuning a convolutional neural network to a new domain? Can we use training examples from general image datasets to improve classification on fine-grained datasets? We present two image similarity metrics and two methods for progressively transitioning from the source dataset to the target dataset when fine-tuning to a new domain. Preliminary results, using the Flowers 102 dataset, show that the first proposed method, stochastic domain subset training, gives an improvement in classification accuracy compared to standard fine-tuning, for one of the two similarity metrics. However, the second method, continuous domain subset training, results in a reduction in classification performance.

year: 2019

title: Energetics of the freshwater mussel Hyridella Menziesi gray

authors: Nobes, Roderick George

abstract: Various aspects of the biology of Hyridella menziesi were studied to obtain an energy budget so that its role in the Waikato River could be elucidated.

Respiration rates were found to increase with both temperature and animal size. The Q₁₀ ranged from 1.1 to 8 °c to 2.6 at 27.5 °c. Weight dependent respiration increased exponentially with weight (in g. dry weight), the relationship being R = 417 W ⁰·⁴¹⁰ μg 0₂.hr⁻¹ at ambient temperatures (18.5 to 24.6 °c).

The water pumping rate (P) increased with animal size (P = 3.8 w⁰·²⁷ ℓ.hr⁻¹), but filtering rates were variable, being affected by the particle retention efficiency of the gill. Retention efficiencies decreased in larger animals, a result of increasing interfilament distances which were evident from electron micrographs.

Filtration rates using Chlorella showed no variation with animal size or food concentration (FC cells. ml⁻¹ ) , the mean being 1.02 ℓ.hr⁻¹, but the proportion of food ingested did depend on the amount available (ingestion ratio = 2.20 FC ⁻⁰·²²) and assimilation efficiencies (AE %), obtained by the dual isotope method of Calow and Fletcher, decreased as the feeding rate increased (AE 272 FR⁻⁰·¹²⁸, FR cells.hr⁻¹).

Calculated energy budgets were positive but cell numbers in the Waikato River fell below that required for maintenance by animals of 0.05 g dry weight and larger during the winter months of July through September. The expected energy fluxes derived from river-bed transect and budget data were higher than those for other bivalves, but similar to that of Potamopyrgus antipodarum which is also found in the Waikato River, and is indicative of the intermediary role played by Hyridella of providing detritus for the benthos and speeding nutrient cycling.

text: Energetics of the freshwater mussel Hyridella Menziesi gray Various aspects of the biology of Hyridella menziesi were studied to obtain an energy budget so that its role in the Waikato River could be elucidated.

Respiration rates were found to increase with both temperature and animal size. The Q₁₀ ranged from 1.1 to 8 °c to 2.6 at 27.5 °c. Weight dependent respiration increased exponentially with weight (in g. dry weight), the relationship being R = 417 W ⁰·⁴¹⁰ μg 0₂.hr⁻¹ at ambient temperatures (18.5 to 24.6 °c).

The water pumping rate (P) increased with animal size (P = 3.8 w⁰·²⁷ ℓ.hr⁻¹), but filtering rates were variable, being affected by the particle retention efficiency of the gill. Retention efficiencies decreased in larger animals, a result of increasing interfilament distances which were evident from electron micrographs.

Filtration rates using Chlorella showed no variation with animal size or food concentration (FC cells. ml⁻¹ ) , the mean being 1.02 ℓ.hr⁻¹, but the proportion of food ingested did depend on the amount available (ingestion ratio = 2.20 FC ⁻⁰·²²) and assimilation efficiencies (AE %), obtained by the dual isotope method of Calow and Fletcher, decreased as the feeding rate increased (AE 272 FR⁻⁰·¹²⁸, FR cells.hr⁻¹).

Calculated energy budgets were positive but cell numbers in the Waikato River fell below that required for maintenance by animals of 0.05 g dry weight and larger during the winter months of July through September. The expected energy fluxes derived from river-bed transect and budget data were higher than those for other bivalves, but similar to that of Potamopyrgus antipodarum which is also found in the Waikato River, and is indicative of the intermediary role played by Hyridella of providing detritus for the benthos and speeding nutrient cycling.

year: 1980

title: Keynote Address: Barriers and incentives to Māori participation in the profession of psychology

authors: Levy, Michelle Patricia

subjects: Maori

abstract: It is well known that Māori are overrepresented
within the client group of
psychologists. Despite ongoing attempts to
recruit and retain more Māori within the
discipline of psychology, the numbers of
Māori psychologists continues to remain
low, raising serious concerns about the
ability of the profession to effectively meet
the needs of its clientele. The objectives of this study were to
identify the, barriers to, and incentives for improving the recruitment and retention
of Māori in the profession of
psychology and Māori to gain and maintain registration
as psychologists. This paper is
based on the full report provided to the
New Zealand Psychologists’ Board. The findings in this study
clearly demonstrate that in order to attract
Māori to participate in psychology, the
majority of environments need to change
substantially. It is simply not enough for
organisations, whether they are educational, professional, or service delivery agencies,
to identify the need for more Māori
psychologists, yet still fail to commit to,
and actively engage in, altering long
identified environmental factors that are
barriers to Māori participation.

text: Keynote Address: Barriers and incentives to Māori participation in the profession of psychology It is well known that Māori are overrepresented
within the client group of
psychologists. Despite ongoing attempts to
recruit and retain more Māori within the
discipline of psychology, the numbers of
Māori psychologists continues to remain
low, raising serious concerns about the
ability of the profession to effectively meet
the needs of its clientele. The objectives of this study were to
identify the, barriers to, and incentives for improving the recruitment and retention
of Māori in the profession of
psychology and Māori to gain and maintain registration
as psychologists. This paper is
based on the full report provided to the
New Zealand Psychologists’ Board. The findings in this study
clearly demonstrate that in order to attract
Māori to participate in psychology, the
majority of environments need to change
substantially. It is simply not enough for
organisations, whether they are educational, professional, or service delivery agencies,
to identify the need for more Māori
psychologists, yet still fail to commit to,
and actively engage in, altering long
identified environmental factors that are
barriers to Māori participation.

year: 2003