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1.
J Stroke Cerebrovasc Dis ; 30(8): 105843, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34000607

RESUMO

OBJECTIVES: There are regional disparities in implementation rates of endovascular thrombectomy due to time and resource constraints such as endovascular thrombectomy specialists. In Hokkaido, Japan, Drive and Retrieve System (DRS), where endovascular thrombectomy specialists perform early endovascular thrombectomies by traveling from the facilities where they normally work to facilities closer to the patient. This study analyzed the cost-effectiveness of allocating a endovascular thrombectomy specialist for DRS to treat stroke patients. MATERIALS AND METHODS: he number of ischemic stroke patients expected to receive endovascular thrombectomy in Hokkaido in 2015 was estimated. It was assumed that an additional neutointerventionist was allocated for DRS. The analysis was performed from the government's perspective, which includes medical and nursing-care costs, and the personnel cost for endovascular thrombectomy specialist. The analysis was conducted comparing the current scenario, where patients received endovascular thrombectomy in facilities where endovascular thrombectomy specialists normally work, with the scenario with DRS within 60 min drive distance. Patient transport time was analyzed using geographic information system, and patient severity was estimated from the transport time. The primary outcome was incremental cost-effectiveness ratio (ICER) in each medical area which was calculated from the incremental costs and the incremental quality-adjusted life years (QALYs), estimated from patient severity using published literature. The entire process was repeated 100 times. RESULTS: DRS was most cost-effective in Kamikawachubu area, where the ICER was $14,173±16,802/QALY, significantly lower than the threshold that the Japanese guideline suggested. CONCLUSIONS: Since DRS was cost-effective in Kamikawachubu area, the area should be prioritized when a endovascular thrombectomy specialist for DRS is allocated as a policy.


Assuntos
Condução de Veículo , AVC Embólico/economia , AVC Embólico/terapia , Procedimentos Endovasculares/economia , Sistemas de Informação Geográfica/economia , Custos de Cuidados de Saúde , Neurologistas/economia , Trombectomia/economia , Área Programática de Saúde/economia , Simulação por Computador , Análise Custo-Benefício , Prestação Integrada de Cuidados de Saúde/economia , AVC Embólico/diagnóstico , AVC Embólico/fisiopatologia , Humanos , Avaliação de Programas e Projetos de Saúde , Anos de Vida Ajustados por Qualidade de Vida , Regionalização da Saúde/economia , Fatores de Tempo , Resultado do Tratamento
2.
J Exp Biol ; 222(Pt 23)2019 12 05.
Artigo em Inglês | MEDLINE | ID: mdl-31753906

RESUMO

Open-source technology has been increasingly used for developing low-cost animal-borne bio-loggers; however, a gap remains for a bio-logger that records both inertial movement and GPS positions. We address this need with the Tapered Wings Logger (TWLogger), an archival bio-logger that records high-resolution (e.g. 50 Hz) tri-axial accelerometry and magnetometry, temperature and GPS. The TWLogger can be built for 90 USD, accepts user-defined sampling parameters, and with a 500 mA h battery weighs 25 g. We provide publicly available build instructions and custom analysis scripts. Bench tests recorded 50 Hz inertial movement and 2 min GPS for 31.8±2.2 h (mean±s.d., n=6) with GPS accuracy within 10.9±13.6 m. Field deployments on a medium-sized bird of prey in the wild achieved similar results (n=13). The customizable TWLogger has wide-ranging application across systems and thus offers a practical solution for eco-physiology applications.


Assuntos
Aves/fisiologia , Ecologia/métodos , Sistemas de Informação Geográfica/instrumentação , Movimento , Fisiologia/métodos , Animais , Sistemas de Informação Geográfica/economia
3.
Drug Alcohol Depend ; 205: 107622, 2019 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-31760294

RESUMO

BACKGROUND: Adolescents who live near more alcohol outlets tend to consume more alcohol, despite laws prohibiting alcohol purchases for people aged <21 years. We examined relationships between adolescents' exposure to alcohol outlets, the sources through which they access alcohol, and their alcohol consumption. METHODS: Participants for this longitudinal study (n = 168) were aged 15-18 years and were from 10 cities in the San Francisco Bay Area. We collected survey data to measure participant characteristics, followed by 1 month of GPS tracking to measure exposure to alcohol outlets (separated into exposures near home and away from home for bars, restaurants, and off-premise outlets). A follow-up survey approximately 1 year later measured alcohol access (through outlets, family members, peers aged <21 years, peers aged ≥21 years) and alcohol consumption (e.g. count of drinking days in last 30). Generalized structural equation models related exposure to alcohol outlets, alcohol access, and alcohol consumption. RESULTS: Exposure to bars and off-premise outlets near home was positively associated with accessing alcohol from peers aged <21, and in turn, accessing alcohol from peers aged <21 was positively associated with alcohol consumption. There was no direct association between exposure to alcohol outlets near home or away from home and alcohol consumption. CONCLUSIONS: Interventions that reduce adolescents' access through peers aged <21 may reduce adolescents' alcohol consumption.


Assuntos
Bebidas Alcoólicas , Comércio/tendências , Restaurantes/tendências , Inquéritos e Questionários , Consumo de Álcool por Menores/prevenção & controle , Consumo de Álcool por Menores/tendências , Adolescente , Adulto , Bebidas Alcoólicas/economia , Comércio/economia , Feminino , Sistemas de Informação Geográfica/economia , Sistemas de Informação Geográfica/tendências , Humanos , Estudos Longitudinais , Masculino , Características de Residência , Restaurantes/economia , São Francisco/epidemiologia , Consumo de Álcool por Menores/economia , Adulto Jovem
4.
Am J Trop Med Hyg ; 101(3): 661-669, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31436151

RESUMO

Nomadic pastoralists are among the world's hardest-to-reach and least served populations. Pastoralist communities are difficult to capture in household surveys because of factors including their high degree of mobility over remote terrain, fluid domestic arrangements, and cultural barriers. Most surveys use census-based sampling frames which do not accurately capture the demographic and health parameters of nomadic populations. As a result, pastoralists are "invisible" in population data such as the Demographic and Health Surveys (DHS). By combining remote sensing and geospatial analysis, we developed a sampling strategy designed to capture the current distribution of nomadic populations. We then implemented this sampling frame to survey a population of mobile pastoralists in southwest Ethiopia, focusing on maternal and child health (MCH) indicators. Using standardized instruments from DHS questionnaires, we draw comparisons with regional and national data finding disparities with DHS data in core MCH indicators, including vaccination coverage, skilled birth attendance, and nutritional status. Our field validation demonstrates that this method is a logistically feasible alternative to conventional sampling frames and may be used at the population level. Geospatial sampling methods provide cost-affordable and logistically feasible strategies for sampling mobile populations, a crucial first step toward reaching these groups with health services.


Assuntos
Serviços de Saúde Materno-Infantil , Análise Espacial , Migrantes/estatística & dados numéricos , Adolescente , Adulto , Criança , Pré-Escolar , Etiópia , Feminino , Sistemas de Informação Geográfica/economia , Inquéritos Epidemiológicos , Humanos , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Tecnologia de Sensoriamento Remoto , População Rural/estatística & dados numéricos , Inquéritos e Questionários , Vacinação/estatística & dados numéricos , Adulto Jovem
5.
J Stroke Cerebrovasc Dis ; 28(8): 2292-2301, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31200963

RESUMO

BACKGROUND AND PURPOSE: Although endovascular thrombectomy combined with recombinant tissue-type plasminogen activator is effective for treatment of acute ischemic stroke, regional disparities in implementation rates of those treatments have been reported. Drive and retrieve system, where a qualified neurointerventionist travels to another primary stroke center for endovascular thrombectomy, has been practiced in parts of Hokkaido, Japan. This study aims to simulate the cost effectiveness of the drive and retrieve system, which can be a method to enhance equality and cost effectiveness of treatments for acute ischemic stroke. MATERIALS AND METHODS: The number of patients who had acute ischemic stroke in 2015 is estimated. Those patients are generated according to the population distribution, and thereafter patient transport time is analyzed in the 3 scenarios (1) 60-minute drive scenario, (2) 90-minute drive scenario, in which the drive and retrieve system operates within 60-minute or 90-minute driving distance (3) without the system, using geographic information system. Incremental cost-effectiveness rate, quality-adjusted life years, and medical and nursing care costs are estimated from the analyzed transport time. FINDINGS: The incremental cost-effectiveness rate by implementing the system was dominant. Cost reductions of $213,190 in 60-minute drive scenario, and $247,274 in the 90-minute scenario were expected, respectively. Such benefits are the most significant in Soya, Emmon, Rumoi, and Kamikawahokubu medical areas. CONCLUSIONS: The drive and retrieve system could enhance regional equality and cost effectiveness of ischemic stroke treatments in Hokkaido, which can be achieved using existing resources. Further studies are required to clarify its cost effectiveness from hospital perspective.


Assuntos
Condução de Veículo , Isquemia Encefálica/terapia , Procedimentos Endovasculares/economia , Sistemas de Informação Geográfica/economia , Custos de Cuidados de Saúde , Neurologistas/economia , Regionalização da Saúde/economia , Acidente Vascular Cerebral/terapia , Trombectomia/economia , Isquemia Encefálica/diagnóstico , Isquemia Encefálica/epidemiologia , Redução de Custos , Análise Custo-Benefício , Prestação Integrada de Cuidados de Saúde/economia , Sistemas de Informação Geográfica/organização & administração , Disparidades em Assistência à Saúde/economia , Humanos , Japão/epidemiologia , Neurologistas/organização & administração , Qualidade de Vida , Anos de Vida Ajustados por Qualidade de Vida , Regionalização da Saúde/organização & administração , Acidente Vascular Cerebral/diagnóstico , Acidente Vascular Cerebral/epidemiologia , Fatores de Tempo , Tempo para o Tratamento/economia , Resultado do Tratamento
6.
Int J Health Geogr ; 16(1): 14, 2017 04 18.
Artigo em Inglês | MEDLINE | ID: mdl-28420404

RESUMO

BACKGROUND: Many cities in developing countries experience an unplanned and rapid growth. Several studies have shown that the irregular urbanization and equipment of cities produce different health risks and uneven exposure to specific diseases. Consequently, health surveys within cities should be carried out at the micro-local scale and sampling methods should try to capture this urban diversity. METHODS: This article describes the methodology used to develop a multi-stage sampling protocol to select a population for a demographic survey that investigates health disparities in the medium-sized city of Bobo-Dioulasso, Burkina Faso. It is based on the characterization of Bobo-Dioulasso city typology by taking into account the city heterogeneity, as determined by analysis of the built environment and of the distribution of urban infrastructures, such as healthcare structures or even water fountains, by photo-interpretation of aerial photographs and satellite images. Principal component analysis and hierarchical ascendant classification were then used to generate the city typology. RESULTS: Five groups of spaces with specific profiles were identified according to a set of variables which could be considered as proxy indicators of health status. Within these five groups, four sub-spaces were randomly selected for the study. We were then able to survey 1045 households in all the selected sub-spaces. The pertinence of this approach is discussed regarding to classical sampling as random walk method for example. CONCLUSION: This urban space typology allowed to select a population living in areas representative of the uneven urbanization process, and to characterize its health status in regards to several indicators (nutritional status, communicable and non-communicable diseases, and anaemia). Although this method should be validated and compared with more established methods, it appears as an alternative in developing countries where geographic and population data are scarce.


Assuntos
Cidades/epidemiologia , Sistemas de Informação Geográfica/tendências , Disparidades nos Níveis de Saúde , Saúde da População Urbana/tendências , Adulto , Burkina Faso/epidemiologia , Pré-Escolar , Cidades/economia , Estudos Transversais , Feminino , Sistemas de Informação Geográfica/economia , Inquéritos Epidemiológicos/métodos , Inquéritos Epidemiológicos/tendências , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Distribuição Aleatória , Fatores Socioeconômicos , Saúde da População Urbana/economia
7.
PLoS One ; 12(1): e0170273, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28121992

RESUMO

Due to the lack of dependency for routing initiation and an inadequate allocated sextant on responding messages, the secure geographic routing protocols for Wireless Sensor Networks (WSNs) have attracted considerable attention. However, the existing protocols are more likely to drop packets when legitimate nodes fail to respond to the routing initiation messages while attackers in the allocated sextant manage to respond. Furthermore, these protocols are designed with inefficient collection window and inadequate verification criteria which may lead to a high number of attacker selections. To prevent the failure to find an appropriate relay node and undesirable packet retransmission, this paper presents Secure Region-Based Geographic Routing Protocol (SRBGR) to increase the probability of selecting the appropriate relay node. By extending the allocated sextant and applying different message contention priorities more legitimate nodes can be admitted in the routing process. Moreover, the paper also proposed the bound collection window for a sufficient collection time and verification cost for both attacker identification and isolation. Extensive simulation experiments have been performed to evaluate the performance of the proposed protocol in comparison with other existing protocols. The results demonstrate that SRBGR increases network performance in terms of the packet delivery ratio and isolates attacks such as Sybil and Black hole.


Assuntos
Algoritmos , Redes de Comunicação de Computadores , Segurança Computacional , Tecnologia sem Fio , Agressão , Redes de Comunicação de Computadores/economia , Redes de Comunicação de Computadores/organização & administração , Segurança Computacional/economia , Simulação por Computador , Sistemas de Informação Geográfica/economia , Software , Tecnologia sem Fio/economia , Tecnologia sem Fio/organização & administração
8.
J Exp Biol ; 219(Pt 17): 2687-92, 2016 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-27353230

RESUMO

Unmanned aerial systems (UASs), frequently referred to as 'drones', have become more common and affordable and are a promising tool for collecting data on free-ranging wild animals. We used a Phantom-2 UAS equipped with a gimbal-mounted camera to estimate position, velocity and acceleration of a subject on the ground moving through a grid of GPS surveyed ground control points (area ∼1200 m(2)). We validated the accuracy of the system against a dual frequency survey grade GPS system attached to the subject. When compared with GPS survey data, the estimations of position, velocity and acceleration had a root mean square error of 0.13 m, 0.11 m s(-1) and 2.31 m s(-2), respectively. The system can be used to collect locomotion and localisation data on multiple free-ranging animals simultaneously. It does not require specialist skills to operate, is easily transported to field locations, and is rapidly and easily deployed. It is therefore a useful addition to the range of methods available for field data collection on free-ranging animal locomotion.


Assuntos
Aceleração , Custos e Análise de Custo , Sistemas de Informação Geográfica/economia , Sistemas de Informação Geográfica/instrumentação , Locomoção/fisiologia , Animais , Cães , Gravação em Vídeo
9.
PLoS One ; 11(1): e0146899, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26751565

RESUMO

Species occurrence data provide crucial information for biodiversity studies in the current context of global environmental changes. Such studies often rely on a limited number of occurrence data collected in the field and on pseudo-absences arbitrarily chosen within the study area, which reduces the value of these studies. To overcome this issue, we propose an alternative method of prospection using geo-located street view imagery (SVI). Following a standardised protocol of virtual prospection using both vertical (aerial photographs) and horizontal (SVI) perceptions, we have surveyed 1097 randomly selected cells across Spain (0.1x0.1 degree, i.e. 20% of Spain) for the presence of Arundo donax L. (Poaceae). In total we have detected A. donax in 345 cells, thus substantially expanding beyond the now two-centuries-old field-derived record, which described A. donax only 216 cells. Among the field occurrence cells, 81.1% were confirmed by SVI prospection to be consistent with species presence. In addition, we recorded, by SVI prospection, 752 absences, i.e. cells where A. donax was considered absent. We have also compared the outcomes of climatic niche modeling based on SVI data against those based on field data. Using generalized linear models fitted with bioclimatic predictors, we have found SVI data to provide far more compelling results in terms of niche modeling than does field data as classically used in SDM. This original, cost- and time-effective method provides the means to accurately locate highly visible taxa, reinforce absence data, and predict species distribution without long and expensive in situ prospection. At this time, the majority of available SVI data is restricted to human-disturbed environments that have road networks. However, SVI is becoming increasingly available in natural areas, which means the technique has considerable potential to become an important factor in future biodiversity studies.


Assuntos
Biodiversidade , Análise Custo-Benefício , Monitoramento Ambiental/economia , Sistemas de Informação Geográfica/economia , Poaceae , Clima , Coleta de Dados , Ecologia , Geografia , Modelos Lineares , Análise de Componente Principal , Probabilidade , Espanha
10.
Water Sci Technol ; 72(11): 1923-30, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26606085

RESUMO

Planners and decision-makers in the wastewater sector are often confronted with the problem of identifying adequate development strategies and most suitable finance schemes for decentralized wastewater infrastructure. This paper research has focused on providing an approach in support of such decision-making. It is based on basic principles that stand for an integrated perspective towards sustainable wastewater management. We operationalize these principles by means of a geographic information system (GIS)-based approach 'Assessment of Local Lowest-Cost Wastewater Solutions'--ALLOWS. The main product of ALLOWS is the identification of cost-effective local wastewater management solutions for any given demographic and physical context. By using universally available input data the tool allows decision-makers to compare different wastewater solutions for any given wastewater situation. This paper introduces the ALLOWS-GIS tool. Its application and functionality are illustrated by assessing different wastewater solutions for two neighboring communities in rural Jordan.


Assuntos
Sistemas de Informação Geográfica , Águas Residuárias/análise , Purificação da Água/métodos , Tomada de Decisões , Sistemas de Informação Geográfica/economia , Sistemas de Informação Geográfica/legislação & jurisprudência , Irã (Geográfico) , Jordânia , Política , População Rural , Purificação da Água/economia , Purificação da Água/legislação & jurisprudência
11.
J Sports Sci ; 33(17): 1853-8, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25751742

RESUMO

This study aimed to apply a validated bioenergetics model of sprint running to recordings obtained from commercial basic high-sensitivity global positioning system receivers to estimate energy expenditure and physical activity variables during soccer refereeing. We studied five Italian fifth division referees during 20 official matches while carrying the receivers. By applying the model to the recorded speed and acceleration data, we calculated energy consumption during activity, mass-normalised total energy consumption, total distance, metabolically equivalent distance and their ratio over the entire match and the two halves. Main results were as follows: (match) energy consumption = 4729 ± 608 kJ, mass normalised total energy consumption = 74 ± 8 kJ · kg(-1), total distance = 13,112 ± 1225 m, metabolically equivalent distance = 13,788 ± 1151 m and metabolically equivalent/total distance = 1.05 ± 0.05. By using a very low-cost device, it is possible to estimate the energy expenditure of soccer refereeing. The provided predicting mass-normalised total energy consumption versus total distance equation can supply information about soccer refereeing energy demand.


Assuntos
Metabolismo Energético/fisiologia , Sistemas de Informação Geográfica/economia , Futebol/fisiologia , Adulto , Custos e Análise de Custo , Humanos , Masculino , Corrida/fisiologia
12.
Int J Health Geogr ; 13: 49, 2014 Dec 06.
Artigo em Inglês | MEDLINE | ID: mdl-25479768

RESUMO

BACKGROUND: Geographic Information Systems (GIS) have become an important tool in monitoring and improving health services, particularly at local levels. However, GIS data are often unavailable in rural settings and village-level mapping is resource-intensive. This study describes the use of community health workers' (CHW) supervisors to map villages in a mountainous rural district of Northern Rwanda and subsequent use of these data to map village-level variability in safe water availability. METHODS: We developed a low literacy and skills-focused training in the local language (Kinyarwanda) to train 86 CHW Supervisors and 25 nurses in charge of community health at the health center (HC) and health post (HP) levels to collect the geographic coordinates of the villages using Global Positioning Systems (GPS). Data were validated through meetings with key stakeholders at the sub-district and district levels and joined using ArcMap 10 Geo-processing tools. Costs were calculated using program budgets and activities' records, and compared with the estimated costs of mapping using a separate, trained GIS team. To demonstrate the usefulness of this work, we mapped drinking water sources (DWS) from data collected by CHW supervisors from the chief of the village. DWSs were categorized as safe versus unsafe using World Health Organization definitions. RESULT: Following training, each CHW Supervisor spent five days collecting data on the villages in their coverage area. Over 12 months, the CHW supervisors mapped the district's 573 villages using 12 shared GPS devices. Sector maps were produced and distributed to local officials. The cost of mapping using CHW supervisors was $29,692, about two times less than the estimated cost of mapping using a trained and dedicated GIS team ($60,112). The availability of local mapping was able to rapidly identify village-level disparities in DWS, with lower access in populations living near to lakes and wetlands (p < .001). CONCLUSION: Existing national CHW system can be leveraged to inexpensively and rapidly map villages even in mountainous rural areas. These data are important to provide managers and decision makers with local-level GIS data to rapidly identify variability in health and other related services to better target and evaluate interventions.


Assuntos
Agentes Comunitários de Saúde/economia , Sistemas de Informação Geográfica/economia , Mapeamento Geográfico , Recursos em Saúde/economia , Saúde Pública/economia , População Rural , Agentes Comunitários de Saúde/estatística & dados numéricos , Análise Custo-Benefício , Água Potável/análise , Sistemas de Informação Geográfica/estatística & dados numéricos , Recursos em Saúde/estatística & dados numéricos , Humanos , Saúde Pública/estatística & dados numéricos , População Rural/estatística & dados numéricos , Ruanda/epidemiologia
13.
BMC Psychiatry ; 14: 160, 2014 May 30.
Artigo em Inglês | MEDLINE | ID: mdl-24885489

RESUMO

BACKGROUND: Getting lost outside is stressful for people with dementia and their caregivers and a leading cause of long-term institutionalisation. Although Global Positional Satellite (GPS) location has been promoted to facilitate safe walking, reduce caregivers' anxiety and enable people with dementia to remain at home, there is little high quality evidence about its acceptability, effectiveness or cost-effectiveness. This observational study explored the feasibility of recruiting and retaining participants, and the acceptability of outcome measures, to inform decisions about the feasibility of a randomised controlled trial (RCT). METHODS: People with dementia who had been provided with GPS devices by local social-care services and their caregivers were invited to participate in this study. We undertook interviews with people with dementia, caregivers and professionals to explore the perceived utility and challenges of GPS location, and assessed quality of life (QoL) and mental health. We piloted three methods of calculating resource use: caregiver diary; bi-monthly telephone questionnaires; and interrogation of health and social care records. We asked caregivers to estimate the time spent searching if participants became lost before and whilst using GPS. RESULTS: Twenty people were offered GPS locations services by social-care services during the 8-month recruitment period. Of these, 14 agreed to be referred to the research team, 12 of these participated and provided data. Eight people with dementia and 12 caregivers were interviewed. Most participants and professionals were very positive about using GPS. Only one person completed a diary. Resource use, anxiety and depression and QoL questionnaires were considered difficult and were therefore declined by some on follow-up. Social care records were time consuming to search and contained many omissions. Caregivers estimated that GPS reduced searching time although the accuracy of this was not objectively verified. CONCLUSIONS: Our data suggest that a RCT will face challenges not least that widespread enthusiasm for GPS among social-care staff may challenge recruitment and its ready availability may risk contamination of controls. Potential primary outcomes of a RCT should not rely on caregivers' recall or questionnaire completion. Time spent searching (if this could be accurately captured) and days until long-term admission are potentially suitable outcomes.


Assuntos
Cuidadores , Demência/psicologia , Sistemas de Informação Geográfica/economia , Idoso , Idoso de 80 Anos ou mais , Doença de Alzheimer/psicologia , Ansiedade/psicologia , Análise Custo-Benefício , Depressão/psicologia , Estudos de Viabilidade , Feminino , Sistemas de Informação Geográfica/instrumentação , Humanos , Masculino , Pessoa de Meia-Idade , Avaliação de Resultados em Cuidados de Saúde , Admissão do Paciente , Seleção de Pacientes , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Inquéritos e Questionários
15.
Waste Manag ; 33(4): 785-92, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23402896

RESUMO

Municipal solid waste management is a multidisciplinary activity that includes generation, source separation, storage, collection, transfer and transport, processing and recovery, and, last but not least, disposal. The optimization of waste collection, through source separation, is compulsory where a landfill based management must be overcome. In this paper, a few aspects related to the implementation of a Web-GIS based system are analyzed. This approach is critically analyzed referring to the experience of two Italian case studies and two additional extra-European case studies. The first case is one of the best examples of selective collection optimization in Italy. The obtained efficiency is very high: 80% of waste is source separated for recycling purposes. In the second reference case, the local administration is going to be faced with the optimization of waste collection through Web-GIS oriented technologies for the first time. The starting scenario is far from an optimized management of municipal solid waste. The last two case studies concern pilot experiences in China and Malaysia. Each step of the Web-GIS oriented strategy is comparatively discussed referring to typical scenarios of developed and transient economies. The main result is that transient economies are ready to move toward Web oriented tools for MSW management, but this opportunity is not yet well exploited in the sector.


Assuntos
Sistemas de Informação Geográfica , Gerenciamento de Resíduos , China , Sistemas de Informação Geográfica/economia , Internet , Itália , Malásia , Gerenciamento de Resíduos/economia
16.
Geogr J ; 178(1): 18-30, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22400154

RESUMO

Geographers play important roles in public health research, particularly in understanding healthcare accessibility, utilisation, and individual healthcare experiences. Most accessibility studies have benefited from the increased sophistication of geographic information systems (GIS). Some studies have been enhanced with semi-structured in-depth interviews to understand individual experiences of people as they access healthcare. However, few accessibility studies have explicitly utilised individual in-depth interview data in the construction of new GIS accessibility measures. Using mixed methods including GIS analysis and individual data from semi-structured in-depth interviews, we offer satisfaction-adjusted distance as a new way of conceptualising accessibility in GIS. Based on fieldwork in a predominantly lower-income community in Columbus, Ohio (USA), we find many residents felt neighbourhood healthcare facilities offered low-quality care, which suggested an added perceived distance as they attempt to access high-quality healthcare facilities. The satisfaction-adjusted distance measure accounts for the perceived distance some residents feel as they search for high-quality healthcare in lower-income urban neighbourhoods. In moving beyond conventional GIS and re-conceptualising accessibility in this way, we offer a more realistic portrayal of the issues lower-income urban residents face as they attempt to access high-quality healthcare facilities. The work has theoretical implications for conceptualising healthcare accessibility, advances the mixed-methodologies literature, and argues for a more equitable distribution of high-quality healthcare in urban neighbourhoods.


Assuntos
Atenção à Saúde , Sistemas de Informação Geográfica , Acessibilidade aos Serviços de Saúde , Garantia da Qualidade dos Cuidados de Saúde , Características de Residência , Classe Social , População Urbana , Comportamento do Consumidor/economia , Comportamento do Consumidor/legislação & jurisprudência , Atenção à Saúde/economia , Atenção à Saúde/etnologia , Atenção à Saúde/história , Atenção à Saúde/legislação & jurisprudência , Sistemas de Informação Geográfica/economia , Sistemas de Informação Geográfica/história , Sistemas de Informação Geográfica/legislação & jurisprudência , Acessibilidade aos Serviços de Saúde/economia , Acessibilidade aos Serviços de Saúde/história , Acessibilidade aos Serviços de Saúde/legislação & jurisprudência , História do Século XX , História do Século XXI , Ohio/etnologia , Saúde Pública/economia , Saúde Pública/educação , Saúde Pública/história , Saúde Pública/legislação & jurisprudência , Garantia da Qualidade dos Cuidados de Saúde/economia , Garantia da Qualidade dos Cuidados de Saúde/história , Garantia da Qualidade dos Cuidados de Saúde/legislação & jurisprudência , Características de Residência/história , Classe Social/história , População Urbana/história
17.
PLoS One ; 7(2): e31338, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22363623

RESUMO

PURPOSE: The present study evaluates the intra- and inter-unit variability of the GlobalSat® DG100 GPS data logger/receiver (DG100) when estimating outdoor walking distances and speeds. METHODS: Two experiments were performed using healthy subjects walking on a 400 m outdoor synthetic track. The two experiments consisted of two different outdoor prescribed walking protocols with distances ranging from 50 to 400 m. Experiment 1 examined the intra-unit variability of the DG100 (test-retest reproducibility) when estimating walking distances. Experiment 2 examined the inter-unit variability of four DG100 devices (unit to unit variability) when estimating walking distances and speeds. RESULTS: The coefficient of variation [95% confidence interval], for the reliability of estimating walking distances, was 2.8 [2.5-3.2] %. The inter-unit variability among the four DG100 units tested ranged from 2.8 [2.5-3.2] % to 3.9 [3.5-4.4] % when estimating distances and from 2.7 [2.4-3.0] % to 3.8 [3.4-4.2] % when estimating speeds. CONCLUSION: The present study indicates that the DG100, an economical and convenient GPS data logger/receiver, can be reliably used to study human outdoor walking activities in unobstructed conditions. This device let facilitate the use of GPS in studies of health and disease.


Assuntos
Sistemas de Informação Geográfica/economia , Sistemas de Informação Geográfica/instrumentação , Saúde , Monitorização Ambulatorial/economia , Monitorização Ambulatorial/instrumentação , Caminhada/fisiologia , Adulto , Custos e Análise de Custo , Feminino , Humanos , Masculino , Descanso
18.
PLoS One ; 7(1): e29235, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22242163

RESUMO

BACKGROUND: Despite the increasing worldwide use of global positioning system (GPS) telemetry in wildlife research, it has never been tested on any freshwater diving animal or in the peculiar conditions of the riparian habitat, despite this latter being one of the most important habitat types for many animal taxa. Moreover, in most cases, the GPS devices used have been commercial and expensive, limiting their use in low-budget projects. METHODOLOGY/PRINCIPAL FINDINGS: We have developed a low-cost, easily constructed GPS GSM/GPRS (Global System for Mobile Communications/General Packet Radio Service) and examined its performance in stationary tests, by assessing the influence of different habitat types, including the riparian, as well as water submersion and certain climatic and environmental variables on GPS fix-success rate and accuracy. We then tested the GPS on wild diving animals, applying it, for the first time, to an otter species (Lutra lutra). The rate of locations acquired during the stationary tests reached 63.2%, with an average location error of 8.94 m (SD = 8.55). GPS performance in riparian habitats was principally affected by water submersion and secondarily by GPS inclination and position within the riverbed. Temporal and spatial correlations of location estimates accounted for some variation in the data sets. GPS-tagged otters also provided accurate locations and an even higher GPS fix-success rate (68.2%). CONCLUSIONS/SIGNIFICANCE: Our results suggest that GPS telemetry is reliably applicable to riparian and even diving freshwater animals. They also highlight the need, in GPS wildlife studies, for performing site-specific pilot studies on GPS functioning as well as for taking into account eventual spatial and temporal correlation of location estimates. The limited price, small dimensions, and high performance of the device presented here make it a useful and cost-effective tool for studies on otters and other aquatic or terrestrial medium-to-large-sized animals.


Assuntos
Animais Selvagens/fisiologia , Telefone Celular/economia , Sistemas de Informação Geográfica/economia , Lontras/fisiologia , Rádio/economia , Telemetria/economia , Telemetria/métodos , Animais , Custos e Análise de Custo , Feminino , Internet , Modelos Lineares , Portugal , Estatística como Assunto , Fatores de Tempo
19.
PLoS One ; 6(9): e23027, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21931593

RESUMO

INTRODUCTION: Accurate and objective measurements of physical activity and lower-extremity function are important in health and disease monitoring, particularly given the current epidemic of chronic diseases and their related functional impairment. PURPOSE: The aim of the present study was to determine the accuracy of a handy (lightweight, small, only one stop/start button) and low-cost (∼$75 with its external antenna) Global Positioning System (GPS) data logger/receiver (the DG100) as a tool to study outdoor human walking in perspective of health and clinical research studies. Methods. Healthy subjects performed two experiments that consisted of different prescribed outdoor walking protocols. Experiment 1. We studied the accuracy of the DG100 for detecting bouts of walking and resting. Experiment 2. We studied the accuracy of the DG100 for estimating distances and speeds of walking. RESULTS: Experiment 1. The performance in the detection of bouts, expressed as the percentage of walking and resting bouts that were correctly detected, was 92.4% [95% Confidence Interval: 90.6-94.3]. Experiment 2. The coefficients of variation [95% Confidence Interval] for the accuracy of estimating the distances and speeds of walking were low: 3.1% [2.9-3.3] and 2.8% [2.6-3.1], respectively. CONCLUSION: The DG100 produces acceptable accuracy both in detecting bouts of walking and resting and in estimating distances and speeds of walking during the detected walking bouts. However, before we can confirm that the DG100 can be used to study walking with respect to health and clinical studies, the inter- and intra-DG100 variability should be studied. TRIAL REGISTRATION: ClinicalTrials.gov NCT00485147.


Assuntos
Coleta de Dados/economia , Coleta de Dados/métodos , Sistemas de Informação Geográfica/economia , Saúde/estatística & dados numéricos , Caminhada/estatística & dados numéricos , Adulto , Coleta de Dados/instrumentação , Feminino , Humanos , Masculino , Adulto Jovem
20.
Health Informatics J ; 17(3): 161-72, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21937460

RESUMO

Whereas in most sectors, technology has taken over trivial and labour consuming tasks, this transformation has been delayed in the healthcare sector. Although appropriate technology is available, there is general resistance to substituting 'warm' hands with 'cold' technology. In the future, this may change as the number of elderly people increases relative to the people in the work force. In combination with an increasing demand for healthcare services, there are calls for efforts to increase productivity in the sector. Based on experience data from previous studies on information and communication technology efforts in the healthcare sector, we quantitatively assess the use of smart house technology and video visits in home care. Having identified healthcare providers, hospitals and relatives as the main affected groups, we show that smart house technology is cost-effective, even if only relatives gain from it. Video visits, which have higher implementation costs, demand effects on both relatives and health care providers in order to be a cost-effective tool in home care. As the analysis is purely quantitative, these results need to be complemented with qualitative effects and with more thorough discussions of the ethical, medical and legal aspects of the use of technology in home care.


Assuntos
Serviços de Assistência Domiciliar/economia , Consulta Remota/economia , Consulta Remota/métodos , Idoso , Cuidadores/economia , Doença Crônica/economia , Doença Crônica/terapia , Análise Custo-Benefício , Pessoas com Deficiência , Sistemas de Informação Geográfica/economia , Humanos , Microcomputadores , Noruega
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