title: Using machine learning techniques to track individuals & their fitness activities

authors: Reichherzer, Thomas

subjects: wearable fitness device

abstract: The use of wearable devices for fitness and health tracking is on an upward curve with a range of devices now available from a number of manufacturers. The devices work with smart devices to exchange data via Bluetooth communication protocol. This paper presents the results of an initial study on the security and privacy weaknesses of wearable fitness devices. It discusses methods to 1) capture and process data sent from a wearable device to its paired smartphone during synchronization and 2) analyze the records to track individuals and make predictions. The data analysis methods use supervised machine-learning techniques to train a classifier for associating synchronization records with the individuals, their physical activities, and conditions under which they were performed. Results of the study show that the methods allow individuals and their activities to be tracked, both of which infringe on the privacy of the user. The paper also provides recommendations on improving the security of wearable devices based on the initial research results.

text: Using machine learning techniques to track individuals & their fitness activities The use of wearable devices for fitness and health tracking is on an upward curve with a range of devices now available from a number of manufacturers. The devices work with smart devices to exchange data via Bluetooth communication protocol. This paper presents the results of an initial study on the security and privacy weaknesses of wearable fitness devices. It discusses methods to 1) capture and process data sent from a wearable device to its paired smartphone during synchronization and 2) analyze the records to track individuals and make predictions. The data analysis methods use supervised machine-learning techniques to train a classifier for associating synchronization records with the individuals, their physical activities, and conditions under which they were performed. Results of the study show that the methods allow individuals and their activities to be tracked, both of which infringe on the privacy of the user. The paper also provides recommendations on improving the security of wearable devices based on the initial research results.

year: 2017

title: Exploring the antecedents of intentions to leave the job: The case of luxury hotel staff

authors: Mohsin, Asad

subjects: staff turnover

abstract: The aim of this study is to assess the antecedents of employee’ intentions to resign from their jobs in luxury hotels in India. Two aspects are considered in this context: firstly, the employees’ enthusiasm for the profession and organisation, the nature of the work and its impact on social and family life. Secondly, their level of satisfaction with the job in terms of organisational loyalty, relationship with supervisors, job security, earnings and additional benefits. A theoretical model (see Fig. 1) and seven hypotheses are tested to indicate whether the employees’ level of agreement with statements about the job and their level of satisfaction with the job will impact their intentions to quit. The study further examines if any current employees intend to leave their job. The term luxury hotel is used to represent 5 star and 4 star hotels of India.
Findings from the analyses of 884 responses suggest that, when considering intentions to resign from the job, a negative relationship is found between professional and organisational enthusiasm and perceptions about the work being stimulating. No support was found for a positive relationship between the extent work impacted social and family life and the intention to quit. However, results supported the notion that the employee's organisational loyalty has a negative effect on his/her intention to resign from the job. Our findings contradict several other studies in that they suggest the employee's intention to resign from the job increases as job security and earnings improve. The study is distinctive as it explores intentions luxury hotel employees in India to leave their jobs; three is little evidence in the wider literature of similar attempts in the context of the Indian hotel industry. The outcomes have implications for both theory and practice as this is the first such major study in the context of the hotel industry in India where there is a population of over a billion people and an expanding hotel industry.

text: Exploring the antecedents of intentions to leave the job: The case of luxury hotel staff The aim of this study is to assess the antecedents of employee’ intentions to resign from their jobs in luxury hotels in India. Two aspects are considered in this context: firstly, the employees’ enthusiasm for the profession and organisation, the nature of the work and its impact on social and family life. Secondly, their level of satisfaction with the job in terms of organisational loyalty, relationship with supervisors, job security, earnings and additional benefits. A theoretical model (see Fig. 1) and seven hypotheses are tested to indicate whether the employees’ level of agreement with statements about the job and their level of satisfaction with the job will impact their intentions to quit. The study further examines if any current employees intend to leave their job. The term luxury hotel is used to represent 5 star and 4 star hotels of India.
Findings from the analyses of 884 responses suggest that, when considering intentions to resign from the job, a negative relationship is found between professional and organisational enthusiasm and perceptions about the work being stimulating. No support was found for a positive relationship between the extent work impacted social and family life and the intention to quit. However, results supported the notion that the employee's organisational loyalty has a negative effect on his/her intention to resign from the job. Our findings contradict several other studies in that they suggest the employee's intention to resign from the job increases as job security and earnings improve. The study is distinctive as it explores intentions luxury hotel employees in India to leave their jobs; three is little evidence in the wider literature of similar attempts in the context of the Indian hotel industry. The outcomes have implications for both theory and practice as this is the first such major study in the context of the hotel industry in India where there is a population of over a billion people and an expanding hotel industry.

year: 2013

title: Association of Single Nucleotide Polymorphisms in Surfactant Protein A and D with Otitis Media.

authors: Barnett, Catherine Margaret Eleanor

subjects: otitis media

abstract: Otitis Media is one of the most common childhood diseases. Recurrent acute otitis media RAOM is characterized by repeated episodes of inflammation of the middle ear in conjunction with middle ear fluid, and often with an inflamed or bulging eardrum. Defective clearance by the Eustachian tube results in mucus build-up and is characteristic of otitis media with effusion (OME). Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis, respiratory syncytial virus, and rhinovirus are the most common contributors to otitis media pathogenesis. In New Zealand, OME has been implicated with conductive hearing loss in childhood and has been shown to significantly impact on speech and language development. New Zealand Māori and Polynesian children have displayed significantly higher hearing test failure rates than European-Caucasian children.

The collectins, Surfactant Protein (SP)-A and -D are encoded by three genes (SP-A1, SP-A2, and SP-D) and are host defense proteins present in the middle ear and Eustachian tube. Single nucleotide polymorphisms (SNPs) in SP-A1 and SP-A2 have been associated with increased or decreased susceptibility to otitis media, meningococcal disease, and range of respiratory diseases. Using allele-specific primers and real-time PCR with SYBR  Green I melting curve analysis, four groups of individuals were genotyped for eleven SP-A1, SP-A2, and SP-D SNPs: European-Caucasian individuals with RAOM/OME; New Zealand Māori/Polynesian individuals with RAOM/OME; individuals with meningococcal disease; and a control group. The computer program, Haploview, was employed to perform χ2 analyses and identify statistically significant associations of alleles/haplotypes with RAOM/OME or meningococcal disease.

In the European-Caucasian population, two SP-A1 alleles, one SP-A2 allele, and four haplotypes (CGAGC, 1A3, 1A9, and 1A10) were found to be associated with increased risk of RAOM/OME (P lt; 0.05). Conversely, haplotypes 6A2 and 1A2 were found to be protective against susceptibility to RAOM/OME (P lt; 0.05). In New Zealand Māori and Polynesian individuals, two SP-A1 alleles, three SP-A2 alleles, one SP-D allele, and four haplotypes (6A8, 6A10, 1A3, and 1A10) were found to be associated with increased risk of RAOM/OME (P lt; 0.05). An additional four haplotypes (6A2, 1A0, 1A2, and TA) were determined to be protective against susceptibility to RAOM/OME (P lt; 0.05). However, protective SPA1/SPA2/SPD haplotype 6A2-1A0-TA was significantly under-represented in the New Zealand Māori and Polynesian population (P lt; 0.05). A single allele and haplotype were associated with increased risk of meningococcal disease (P lt; 0.05).

The findings of this study confirm that specific genetic variants of SP-A and SP-D are associated with either increased or decreased risk of developing RAOM and/or OME. Furthermore, it was demonstrated that New Zealand Māori and Polynesian individuals appear to exhibit more haplotypes susceptible to RAOM/OME. This may provide a partial explanation for the higher RAOM/OME-related failure rates of hearing tests in New Zealand Māori and Polynesian children. However, there are numerous socio-economic and environmental factors that also contribute to otitis media pathogenesis which were not considered in this study. The effects of the SP-A1, SP-A2, and SP-D alleles and haplotypes on the bacterial/viral binding efficiencies of SP-A and SP-D need to be investigated by further research, using a large population, to confirm the association with susceptibility or resistance with RAOM/OME.

text: Association of Single Nucleotide Polymorphisms in Surfactant Protein A and D with Otitis Media. Otitis Media is one of the most common childhood diseases. Recurrent acute otitis media RAOM is characterized by repeated episodes of inflammation of the middle ear in conjunction with middle ear fluid, and often with an inflamed or bulging eardrum. Defective clearance by the Eustachian tube results in mucus build-up and is characteristic of otitis media with effusion (OME). Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis, respiratory syncytial virus, and rhinovirus are the most common contributors to otitis media pathogenesis. In New Zealand, OME has been implicated with conductive hearing loss in childhood and has been shown to significantly impact on speech and language development. New Zealand Māori and Polynesian children have displayed significantly higher hearing test failure rates than European-Caucasian children.

The collectins, Surfactant Protein (SP)-A and -D are encoded by three genes (SP-A1, SP-A2, and SP-D) and are host defense proteins present in the middle ear and Eustachian tube. Single nucleotide polymorphisms (SNPs) in SP-A1 and SP-A2 have been associated with increased or decreased susceptibility to otitis media, meningococcal disease, and range of respiratory diseases. Using allele-specific primers and real-time PCR with SYBR  Green I melting curve analysis, four groups of individuals were genotyped for eleven SP-A1, SP-A2, and SP-D SNPs: European-Caucasian individuals with RAOM/OME; New Zealand Māori/Polynesian individuals with RAOM/OME; individuals with meningococcal disease; and a control group. The computer program, Haploview, was employed to perform χ2 analyses and identify statistically significant associations of alleles/haplotypes with RAOM/OME or meningococcal disease.

In the European-Caucasian population, two SP-A1 alleles, one SP-A2 allele, and four haplotypes (CGAGC, 1A3, 1A9, and 1A10) were found to be associated with increased risk of RAOM/OME (P lt; 0.05). Conversely, haplotypes 6A2 and 1A2 were found to be protective against susceptibility to RAOM/OME (P lt; 0.05). In New Zealand Māori and Polynesian individuals, two SP-A1 alleles, three SP-A2 alleles, one SP-D allele, and four haplotypes (6A8, 6A10, 1A3, and 1A10) were found to be associated with increased risk of RAOM/OME (P lt; 0.05). An additional four haplotypes (6A2, 1A0, 1A2, and TA) were determined to be protective against susceptibility to RAOM/OME (P lt; 0.05). However, protective SPA1/SPA2/SPD haplotype 6A2-1A0-TA was significantly under-represented in the New Zealand Māori and Polynesian population (P lt; 0.05). A single allele and haplotype were associated with increased risk of meningococcal disease (P lt; 0.05).

The findings of this study confirm that specific genetic variants of SP-A and SP-D are associated with either increased or decreased risk of developing RAOM and/or OME. Furthermore, it was demonstrated that New Zealand Māori and Polynesian individuals appear to exhibit more haplotypes susceptible to RAOM/OME. This may provide a partial explanation for the higher RAOM/OME-related failure rates of hearing tests in New Zealand Māori and Polynesian children. However, there are numerous socio-economic and environmental factors that also contribute to otitis media pathogenesis which were not considered in this study. The effects of the SP-A1, SP-A2, and SP-D alleles and haplotypes on the bacterial/viral binding efficiencies of SP-A and SP-D need to be investigated by further research, using a large population, to confirm the association with susceptibility or resistance with RAOM/OME.

year: 2007