Opportunistic Environmental Sensing with Smartphones: a Critical Review of Current Literature and Applications

A smartphone digital image colorimetric method based on nanoparticles for determination of lamotrigine

Aim: A colorimetric approach for quantification of lamotrigine using spectrophotometric and smartphone image analysis is described in this study. Methods: For full optimization and validation procedures, UV-visible spectroscopy was used, and image analysis was carried out with the help of an app (PhotoMetrix PRO®). Then, as a multivariate calibration method, parallel factor analysis was used for data analysis. Results: The results demonstrated the capacity of these methods to estimate lamotrigine concentrations in the range of 0.1-7.0 μg.ml-1 in exhaled breath condensate, indicating the value of using digital images and smartphone applications in combination with chemometric tools. Conclusion: The image analysis can be superior for its fast and reliable lamotrigine analysis in biological samples.

Measuring Environmental Justice in Real Time: A Pilot Study Using Digital Participatory Method in the Global South, Nepal

Individuals' perceived fairness or justice beliefs are related to health in numerous ways. However, environment justice research to date has given little attention to perceived fairness of environmental exposures as experienced by individuals. This study explored the feasibility of a bottom-up digital participatory (via mobile phones) approach using ecological momentary assessment (EMA) to capture individuals' subjective experience of environmental exposures and the subjective evaluation of fairness by those affected in the context of Nepal. In total, 22 individuals participated in the study for 28 days. The results show high rates of study retention and adherence. Individuals' justice perception was found to vary within and between individuals, but also substantially depending on the types of environmental exposures. Nevertheless, the study indicates that uncertainties are inevitable as study design and timing may conflict participants' daily lives and priorities. The method allows us to consider multiple geographic contexts of individuals' everyday lives beyond residential environment. This pilot study proved the possibility to assess perceptions of environmental justice issues and demonstrated the necessary steps to using digital participatory method for assessing subjective perception of fairness of individuals.

Estimation of the Lung Function Using Acoustic Features of the Voluntary Cough

Spirometry test, a measure of the patient's lung function, is the gold standard for diagnosis and monitoring of chronic pulmonary diseases. Spirometry is currently being done in hospital settings by having the patients blow the air out of their lungs forcefully and into the spirometer's tubes under the supervision and constant guidance of clinicians. This test is expensive, cumbersome and not easily applicable to every-day monitoring of these patients. The lung mechanism when performing a cough is very similar to when spirometry test is done. That includes a big inhalation, air compression and forceful exhalation. Therefore, it is reasonable to assume that obstruction of lung airways should have a similar effect on both cough features and spirometry measures. This paper explores the estimation of lung obstruction using cough acoustic features. A total number of 3695 coughs were collected from patients from 4 different conditions and 4 different severity categories along with their lung function measures in a clinical setting using a smartphone's microphone and a hospital-grade spirometry lab. After feature-set optimization and model hyperparameter tuning, the lung obstruction was estimated with MAE (Mean Absolute Error) of 8% for COPD and 9% for asthma populations. In addition to lung obstruction estimation, we were able to classify patients' disease state with 91% accuracy and patients' severity within each disease state with 95% accuracy.Clinical Relevance- This enables effort-independent estimation of lung function spirometry parameters which could potentially lead to passive monitoring of pulmonary patients.

HABITAT: An IoT Solution for Independent Elderly

In this work, a flexible and extensive digital platform for Smart Homes is presented, exploiting the most advanced technologies of the Internet of Things, such as Radio Frequency Identification, wearable electronics, Wireless Sensor Networks, and Artificial Intelligence. Thus, the main novelty of the paper is the system-level description of the platform flexibility allowing the interoperability of different smart devices. This research was developed within the framework of the operative project HABITAT (Home Assistance Based on the Internet of Things for the Autonomy of Everybody), aiming at developing smart devices to support elderly people both in their own houses and in retirement homes, and embedding them in everyday life objects, thus reducing the expenses for healthcare due to the lower need for personal assistance, and providing a better life quality to the elderly users.

Information management in the smart city

Purpose

The purpose of this paper is to investigate information management in a smart city. It identifies the main trends in progress and how innovation in information technology is helping all those in the smart city ecosystem in terms of generating new sources of data and connecting them. It investigates how information management in the smart city may go through several phases, but contests the notion that the co-ordinated information management that is the dream of many city managers is an appropriate vision, given the tendency in the private sector for competing information platforms to develop, giving value in different ways.

Design/methodology/approach

This paper has been written by using a combination of academic insight and literature, extensive research of relevant grey literature (e.g. blogs and industry press) and interviews and interaction with some of the organisations involved in developing and implementing the smart city concept, including public transport organisations, other data providers, analysts and systems and sensor suppliers.

Findings

Smart city concepts are evolving in different ways, with divergence of views which involves centralisation and control of information by city authorities and a more democratic view in which the information is managed on different platforms between which smart city stakeholders can choose.

Research limitations/implications

The research method is exploratory. Validating the findings would require a more structured approach in which stakeholders of all kinds are consulted.

Practical implications

All organisational stakeholders in the idea and delivery of smart cities need to consider how their interests in smart city information and those of other stakeholders are evolving and to what extent they should be in partnership with other members of the ecosystem in generating and using the information.

Social implications

Individuals, whether workers, commuters, shoppers, tourists or others, will be greatly affected by the evolution of smart city information, and their choices about whether to be smart themselves will have an important effect on the benefits they receive from city smartening and on the viability of the smart cities.

Originality/value

Little research has been carried out into the different choices organisations and individuals have in terms of how they will relate to smart city information and how they can manage it. This research makes a start on this task.