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: Supremica – An integrated environment for verification, synthesis and simulation of discrete event systems

authors: Akesson, Knut

subjects: computer science

abstract: An integrated environment, Supremica, for verification, synthesis and simulation of discrete event systems is presented. The basic model in Supremica is finite automata where the transitions have an associated event together with a guard condition and an action function that updates automata variables. Supremica uses two main approaches to handle large state-spaces. The first approach exploits modularity in order to divide the original problem into many smaller problems that together solve the original problem. The second approach uses an efficient data structure, a binary decision diagram, to symbolically represent the reachable states. Models in Supremica may be simulated in the environment. It is also possible to generate code that implements the behavior of the model using both the IEC 61131 and the IEC 61499 standard.

text: Supremica – An integrated environment for verification, synthesis and simulation of discrete event systems An integrated environment, Supremica, for verification, synthesis and simulation of discrete event systems is presented. The basic model in Supremica is finite automata where the transitions have an associated event together with a guard condition and an action function that updates automata variables. Supremica uses two main approaches to handle large state-spaces. The first approach exploits modularity in order to divide the original problem into many smaller problems that together solve the original problem. The second approach uses an efficient data structure, a binary decision diagram, to symbolically represent the reachable states. Models in Supremica may be simulated in the environment. It is also possible to generate code that implements the behavior of the model using both the IEC 61131 and the IEC 61499 standard.

year: 2006

title: Evaluation of treatment responsivity in a psychopathic prison treatment sample

authors: Champion, Michelle Elizabeth

subjects: psychopathy

abstract: Although punishment still dominates the criminal justice system, the progression of research on offending and imprisonment has led to a general consensus that rehabilitation programmes are the appropriate method to effectively reduce both recidivism and prison populations. Hence, many effective offender treatment programmes have been developed. This thesis evaluated phase one of a 10 month pilot treatment programme which used the theories and principles of effective programming to develop an effective programme for male high risk violent offenders assessed with elevated psychopathic personality (High Risk Personality Programme; HRPP), a population of offenders that is often regarded as treatment resistant. Specifically, phase one of the HRPP was designed to address the participants’ responsivity barriers (namely, antisocial interpersonal style) in order to increase self-efficacy, therapeutic alliance, treatability, and readiness, and to reduce perceived coercion in order to aid engagement and success in treatment. A sample of 11 male HRPP inmates had data collected before and after their 17-week first phase of the 10 month three-phase programme. Treatment contact comprised four sessions per week, including three group sessions of 2.5 hours, and 1 individual session of one hour, as well as a two-hour group cultural session that focused on Maori cultural identity (10 of the 11 men were Maori). The battery of tests employed included the Self-Efficacy Questionnaire; the responsivity and readiness scales of the Treatment Readiness Responsivity and Gain Scale; the Corrections Victoria Treatment Readiness Questionnaire, the Paulhus Deception Scale, and the therapist and client versions of the Working Alliance Inventory Short Form, the Perceived Coercion Scale, and an evaluation questionnaire. Demographic data was also collected. The results indicated that the majority of the participants came to the intervention ready or motivated to change. Perceived coercion remained low throughout the programme, representing the participant’s voluntary status. On average participants’ levels of self-efficacy and treatability (except callousness) improved significantly over the course of the treatment. Differing levels of improvement were found for the client and therapist perspective of the therapeutic alliance, indicating they interpreted the alliance differently. Participants with high PCL-R factor one scores showed a decrease in coercion, compared to an increase by their counterparts with low PCL-R factor one scores. Participants with high PCL-R factor one scores also had higher overall scores on the CVTRQ readiness measure, and the participant’s perspective of the therapeutic alliance. Individually, six of the treatment participants made significant improvements on at least five of the seven responsivity measures. These findings and their implications for treatment of psychopathic offenders are discussed, along with the relevance of the study’s responsivity measures, the strengths and limitations of the research project, and future research in this area.

text: Evaluation of treatment responsivity in a psychopathic prison treatment sample Although punishment still dominates the criminal justice system, the progression of research on offending and imprisonment has led to a general consensus that rehabilitation programmes are the appropriate method to effectively reduce both recidivism and prison populations. Hence, many effective offender treatment programmes have been developed. This thesis evaluated phase one of a 10 month pilot treatment programme which used the theories and principles of effective programming to develop an effective programme for male high risk violent offenders assessed with elevated psychopathic personality (High Risk Personality Programme; HRPP), a population of offenders that is often regarded as treatment resistant. Specifically, phase one of the HRPP was designed to address the participants’ responsivity barriers (namely, antisocial interpersonal style) in order to increase self-efficacy, therapeutic alliance, treatability, and readiness, and to reduce perceived coercion in order to aid engagement and success in treatment. A sample of 11 male HRPP inmates had data collected before and after their 17-week first phase of the 10 month three-phase programme. Treatment contact comprised four sessions per week, including three group sessions of 2.5 hours, and 1 individual session of one hour, as well as a two-hour group cultural session that focused on Maori cultural identity (10 of the 11 men were Maori). The battery of tests employed included the Self-Efficacy Questionnaire; the responsivity and readiness scales of the Treatment Readiness Responsivity and Gain Scale; the Corrections Victoria Treatment Readiness Questionnaire, the Paulhus Deception Scale, and the therapist and client versions of the Working Alliance Inventory Short Form, the Perceived Coercion Scale, and an evaluation questionnaire. Demographic data was also collected. The results indicated that the majority of the participants came to the intervention ready or motivated to change. Perceived coercion remained low throughout the programme, representing the participant’s voluntary status. On average participants’ levels of self-efficacy and treatability (except callousness) improved significantly over the course of the treatment. Differing levels of improvement were found for the client and therapist perspective of the therapeutic alliance, indicating they interpreted the alliance differently. Participants with high PCL-R factor one scores showed a decrease in coercion, compared to an increase by their counterparts with low PCL-R factor one scores. Participants with high PCL-R factor one scores also had higher overall scores on the CVTRQ readiness measure, and the participant’s perspective of the therapeutic alliance. Individually, six of the treatment participants made significant improvements on at least five of the seven responsivity measures. These findings and their implications for treatment of psychopathic offenders are discussed, along with the relevance of the study’s responsivity measures, the strengths and limitations of the research project, and future research in this area.

year: 2010