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1.
Artículo en Chino | MEDLINE | ID: mdl-34624947

RESUMEN

Objective: To understand the occupational health status of radiation workers at an international airport, and to provide basis and reference for relevant competent authorities to conduct scientific and effective occupational health monitoring. Methods: From July to August 2019, 246 radiation workers at an international airport were selected as the research subjects (observation group) , and their occupational health examination data were collected. At the same time, 210 radiation workers from a medical institution were selected as the control group. The occupational health examination results of the two groups were compared. And the differences in occupational health examination results of airport radiation workers among difference service age were analyzed. Results: Compared with the control group, the detection rates of ocular lens opacity (1.63%, 4/246) and abnormal blood glucose (4.07%, 10/246) in the observation group were lower, the detection rates of abnormal skin (11.79%, 29/246) , abnormal B-ultrasound of liver, gallbladder and spleen (75.61%, 186/246) and abnormal chest X-ray (5.28%, 13/246) were higher (P<0.05) . There were significant differences in the abnormal detection rates of skin, blood glucose, B-ultrasound of liver, gallbladder and spleen among airport radiation workers with different service age (P<0.05) . Abnormal chromosome of peripheral blood lymphocytes, abnormal chest X-ray were mainly distributed in the service age of ≥20 years. The abnormal rate of B-ultrasound of liver, gallbladder and spleen was higher in different working age groups. Conclusion: Long term low-dose irradiation will have a certain impact on the occupational health of airport radiation workers. The occupational health monitoring of relevant personnel should be strengthened to protect their occupational health.


Asunto(s)
Cristalino , Exposición Profesional , Salud Laboral , Adulto , Aeropuertos , Estado de Salud , Humanos , Adulto Joven
2.
Comput Intell Neurosci ; 2021: 2675052, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34512740

RESUMEN

Airport gate assignment performance indicator selection is a complicated decision-making problem with strong subjectivity and difficulty in measuring the importance of each indicator. A better selection of performance indicators (PIs) can greatly increase the airport overall benefit. We adopt a multicriteria decision-making approach to quantify qualitative PIs and conduct subsequent selection using the fuzzy clustering method. First, we identify 21 commonly used PIs through literature review and survey. Subsequently, the fuzzy analytic hierarchy process technique was employed to obtain the selection criteria weights based on the relative importance of significance, availability, and generalisability. Further, we aggregated the selection criteria weights and experts' score to evaluate each PI for the clustering process. The fuzzy-possibilistic product partition c-means algorithm was applied to divide the PIs into different groups based on the three selection criteria as partitioning features. The cluster with highest weights of the centre was identified as the very high-influence cluster, and 10 PIs were identified as a result. This study revealed that the passenger-oriented objective is the most important performance criterion; however, the relevance of the airport/airline-oriented and robustness-oriented performance objectives was highlighted as well. It also offers a scientific approach to determine the objective functions for future gate assignment research. And, we believe, through slight modifications, this model can be used in other airports, other indicator selection problems, or other scenarios at the same airport to facilitate policy making and real situation practice, hence facilitate the management system for the airport.


Asunto(s)
Aeropuertos , Algoritmos , Análisis por Conglomerados , Lógica Difusa
3.
Sensors (Basel) ; 21(17)2021 Aug 27.
Artículo en Inglés | MEDLINE | ID: mdl-34502660

RESUMEN

Multi-Temporal Interferometric Synthetic Aperture Radar (MT-InSAR) techniques are gaining momentum in the assessment and health monitoring of infrastructure assets. Amongst others, the Persistent Scatterers Interferometry (PSI) technique has proven to be viable for the long-term evaluation of ground scatterers. However, its effectiveness as a routine tool for certain critical application areas, such as the assessment of millimetre-scale differential displacements in airport runways, is still debated. This research aims to demonstrate the viability of using medium-resolution Copernicus ESA Sentinel-1A (C-Band) SAR products and their contribution to improve current maintenance strategies in case of localised foundation settlements in airport runways. To this purpose, "Runway n.3" of the "Leonardo Da Vinci International Airport" in Fiumicino, Rome, Italy was investigated as an explanatory case study, in view of historical geotechnical settlements affecting the runway area. In this context, a geostatistical study is developed for the exploratory spatial data analysis and the interpolation of the Sentinel-1A SAR data. The geostatistical analysis provided ample information on the spatial continuity of the Sentinel 1 data in comparison with the high-resolution COSMO-SkyMed data and the ground-based topographic levelling data. Furthermore, a comparison between the PSI outcomes from the Sentinel-1A SAR data-interpolated through Ordinary Kriging-and the ground-truth topographic levelling data demonstrated the high accuracy of the Sentinel 1 data. This is proven by the high values of the correlation coefficient (r = 0.94), the multiple R-squared coefficient (R2 = 0.88) and the Slope value (0.96). The results of this study clearly support the effectiveness of using Sentinel-1A SAR data as a continuous and long-term routine monitoring tool for millimetre-scale displacements in airport runways, paving the way for the development of more efficient and sustainable maintenance strategies for inclusion in next generation Airport Pavement Management Systems (APMSs).


Asunto(s)
Aeropuertos , Radar , Interferometría , Italia
5.
J Environ Manage ; 299: 113639, 2021 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-34479146

RESUMEN

Sustainability has become a focus area for practitioners and scholars due to the growing socio-economic issues. The sustainability of airport operations is being raised in various international platforms. This paper aims to identify the dimensions of sustainability and evaluate sustainable practices in airports of selected ASEAN countries. The various dimensions associated with the environmental aspect are energy management, emissions management, water and effluents management, solid waste management. It was understood that noise management, employee development, and community investment belong to the social dimension. Similarly, the factors such as economic contribution, passenger experience, airport safety, and security are inclined to economic dimensions of sustainability. It was found that environmentally sustainable practices have greater importance than social and economic initiatives in the airport context which provide quantifiable benefits for airports in the long term. Airport operators in South East Asia strived to mitigate carbon emissions, reduce waste and effluents, enhance the economic contribution, satisfy passengers, and meet employee needs. Compared to the total economic and social benefits obtained from these airports, the negative impacts of airport operation (such as noise emission from aircraft) are minimal but significant. The most common sustainable initiatives in airports, such as employee development, energy management, and passenger safety, supported sustainable development goals (SDG) 8, SDG 9, and SDG 11. A weak connection is observed between SDG 14 & SDG 15 and the airport's sustainable practices. The new technological innovations are concentrated in busy and profitable airports. A slow trend towards the adoption of new technologies for sustainable practices is observed in airports. The paper concludes that major airport operators in South-East Asia have effectively responded to the growing sustainability challenges in aviation markets. The sustainable dimensions and practices discussed will be valuable resource for airports striving to achieve sustainability goals.


Asunto(s)
Aeropuertos , Administración de Residuos , Aeronaves , Residuos Sólidos , Tecnología
6.
Artículo en Inglés | MEDLINE | ID: mdl-34501735

RESUMEN

Noise is one of the most diffused environmental stressors affecting modern life. As such, the scientific community is committed to studying the main emission and transmission mechanisms aiming at reducing citizens' exposure, but is also actively studying the effects that noise has on health. However, scientific literature lacks data on multiple sources of noise and cardiovascular outcomes. The present cross-sectional study aims to evaluate the impact that different types of noise source (road, railway, airport and recreational) in an urban context have on blood pressure variations and hypertension. 517 citizens of Pisa, Italy, were subjected to a structured questionnaire and five measures of blood pressure in one day. Participants were living in the same building for at least 5 years, were aged from 37 to 72 years old and were exposed to one or more noise sources among air traffic, road traffic, railway and recreational noise. Logistic and multivariate linear regression models have been applied in order to assess the association between exposures and health outcomes. The analyses showed that prevalence of high levels of diastolic blood pressure (DBP) is consistent with an increase of 5 dB (A) of night-time noise (ß = 0.50 95% CI: 0.18-0.81). Furthermore, increased DBP is also positively associated with more noise sensitive subjects, older than 65 years old, without domestic noise protection, or who never close windows. Among the various noise sources, railway noise was found to be the most associated with DBP (ß = 0.68; 95% CI: -1.36, 2.72). The obtained relation between DBP and night-time noise levels reinforces current knowledge.


Asunto(s)
Hipertensión , Ruido del Transporte , Vías Férreas , Adulto , Anciano , Aeropuertos , Presión Sanguínea , Estudios Transversales , Exposición a Riesgos Ambientales/efectos adversos , Humanos , Hipertensión/epidemiología , Hipertensión/etiología , Persona de Mediana Edad , Ruido del Transporte/efectos adversos
7.
Int J Hyg Environ Health ; 237: 113803, 2021 08.
Artículo en Inglés | MEDLINE | ID: mdl-34517159

RESUMEN

BACKGROUND: Inflammation, oxidative stress and reduced cardiopulmonary function following exposure to ultrafine particles (UFP) from airports has been reported but the biological pathways underlying these toxicological endpoints remain to be explored. Urinary metabolomics offers a robust method by which changes in cellular pathway activity can be characterised following environmental exposures. OBJECTIVE: We assessed the impact of short-term exposures to UFP from different sources at a major airport on the human urinary metabolome. METHODS: 21 healthy, non-smoking volunteers (aged 19-27 years) were repeatedly (2-5 visits) exposed for 5h to ambient air at Amsterdam Airport Schiphol, while performing intermittent, moderate exercise. Pre- to-post exposure changes in urinary metabolite concentrations were assessed via 1H NMR spectroscopy and related to total and source-specific particle number concentrations (PNC) using linear mixed effects models. RESULTS: Total PNC at the exposure site was on average, 53,500 particles/cm3 (range 10,500-173,200) and associated with significant reductions in urinary taurine (-0.262 AU, 95% CI: -0.507 to -0.020) and dimethylamine concentrations (-0.021 AU, 95% CI: -0.040 to -0.067). Aviation UFP exposure accounted for these changes, with the reductions in taurine and dimethylamine associating with UFP produced during both aircraft landing and take-off. Significant reductions in pyroglutamate concentration were also associated with aviation UFP specifically, (-0.005 AU, 95% CI: -0.010 - <0.000) again, with contributions from both landing and take-off UFP exposure. While non-aviation UFPs induced small changes to the urinary metabolome, their effects did not significantly impact the overall response to airport UFP exposure. DISCUSSION: Following short-term exposures at a major airport, aviation-related UFP caused the greatest changes to the urinary metabolome. These were consistent with a heightened antioxidant response and altered nitric oxide synthesis. Although some of these responses could be adaptive, they appeared after short-term exposures in healthy adults. Further study is required to determine whether long-term exposures induce injurious effects.


Asunto(s)
Contaminantes Atmosféricos , Aeropuertos , Adulto , Contaminantes Atmosféricos/análisis , Contaminantes Atmosféricos/toxicidad , Humanos , Metaboloma , Tamaño de la Partícula , Material Particulado/análisis , Material Particulado/toxicidad
8.
Rev Esp Salud Publica ; 952021 Sep 17.
Artículo en Español | MEDLINE | ID: mdl-34531362

RESUMEN

During the state of alert declared in the national territory in March 2020 due to the health crisis caused by SARS-CoV-2, the free movement of the population was restricted in order to prevent the spread of the virus. In the Balearic Islands, access by air and sea was limited and, in addition, health controls were established at the entry points of the islands aimed to detect people with COVID-19. The health check is understood as a Public Health surveillance procedure through which all persons authorised to travel at that time were tested. This procedure, together with the security measures to prevent the spread of the virus, had never before been implemented in the Balearic Islands and required the collaboration of various organizations in order to organise and execute it. This paper shares the experience and analysis of the health control measures implemented in these circumstances. To do so, it describes the procedure carried out, the devices that were developed, the main results and the assessment of the project as a whole. Finally, the positive aspects and possible improvements are considered. The most of people screened upon arrival in Balearics Islands did not register or show clinical symptoms of COVID-19.


Asunto(s)
COVID-19 , Tamizaje Masivo , Viaje , Aeropuertos , COVID-19/epidemiología , COVID-19/prevención & control , Humanos , Navíos , España/epidemiología
9.
Front Public Health ; 9: 663108, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34368046

RESUMEN

Background: Limited information is available covering all medical events managed by the airport-based outreach medical service. This study explores the clinical demand for emergency medical outreach services at Taoyuan International Airport (TIA), Taiwan. Methods: Electronic medical records collected from TIA medical outreach services from 2017 to 2018, included passengers' profiles, flight information, events location, chief complaints, diagnosis (using ICD-9 -CM codes), and management outcomes. Medical events distribution was stratified by location and ages, and were compared statistically. Results: Among 1,501 eligible records, there were 81.8% ground-based emergency medical events (GBME), 16.9% in-flight medical events (IFME) managed after scheduled landing, and 1.3% IFME leading to unscheduled diversion or re-entry to TIA. The top three GBME diagnoses were associated with neurological (23.3%), gastrointestinal (21.2%), and trauma-related (19.3%) conditions. The top three IFME diagnosis that prompted unscheduled landings via flight diversion or re-entry were neurological (47.4%), psychological (15.8%), and cardiovascular (10.5%). The chief complaints that prompted unscheduled landings were mostly related to neurological (42.1%), cardiovascular (26.3%), and out-of-hospital cardiac arrest (OHCA) (10.5%) symptoms. A higher frequency of IFME events due to dermatologic causes in patients aged ≤ 18 years compared with adults and older adults (19 vs. 1.5% and 0, respectively); and a higher frequency of IFME due to cardiovascular causes in adults ≥ 65 years compared with patients aged ≤ 65 (15.1 vs. 9%). Among all IFME patients, six out-of-hospital deaths occurred among passengers from scheduled landings and two deaths occurred among 18 IFME passengers who were transferred to local hospitals from flight diversion or re-entry. A statistically significant difference in outcomes and short-term follow-up status was found between patients with IFME and those with GBME (p < 0.001). Conclusion: Ground-based emergency medical events exceeded in-flight medical events at TIA. The most frequent events were related to neurological, gastrointestinal symptoms, or trauma. Results of this study may provide useful information for training medical outreach staff and preparing medical supplies to meet the clinical demand for airport medical outreach services.


Asunto(s)
Aeropuertos , Servicios Médicos de Urgencia , Anciano , Urgencias Médicas , Humanos , Taiwán/epidemiología , Viaje
10.
PLoS One ; 16(8): e0253586, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34351938

RESUMEN

Passengers' requirements in relation to the Airport Service Quality is rapidly increasing and forcing companies and airport management to improve the services performances. It is clear that this enhancement can not overlook the implication of competitive issues and economic concerns. In this paper the authors deal with the optimization of the check-in area management in the international airport of Lisbon. The proposed bi-criteria objective function minimizes the operational costs plus the costs measuring the passengers' discomfort in terms of waiting time in line. The quality of the supplied check-in service is measured and mapped into the Levels of Service system standardized by the International Air Transport Association. The type of passengers and their stochastic behavior and preferences are simulated by a discrete event model. The operational costs and the passengers' satisfaction are optimized by an algorithm based on the Surrogate Method, the performance of which are compared to those of a greedy heuristic and of a genetic algorithm.


Asunto(s)
Aeropuertos/economía , Algoritmos , Modelos Teóricos , Satisfacción Personal , Humanos
11.
Artículo en Inglés | MEDLINE | ID: mdl-34209699

RESUMEN

Children are considered at higher risk for harmful noise effects due to their sensitive development phase. Here, we investigated the effects of nocturnal aircraft noise exposure on short-term annoyance assessed in the morning in 51 primary school children (8-10 years) living in the surrounding community of Cologne-Bonn Airport. Child-appropriate short-term annoyance assessments and associated non-acoustical variables were surveyed. Nocturnal aircraft noise exposure was recorded inside the children's bedrooms. Exposure-response models were calculated by using random effects logistic regression models. The present data were compared with those from a previous study near Cologne-Bonn Airport in adults using very similar methodology. Short-term annoyance reaction in children was not affected by the nocturnal aircraft noise exposure. Non-acoustical factors (e.g., the attitude that "aircraft are dangerous" or noise sensitivity), however, significantly impacted on children's short-term annoyance. In contrast to children, the probability of moderate to high annoyance in adults increased with the number of aircraft flyovers during the time in bed. It is concluded that short-term annoyance from nocturnal aircraft noise in children is mainly determined by non-acoustical factors. Unlike in adults, acoustical factors did not play a significant role.


Asunto(s)
Ruido del Transporte , Adulto , Aeronaves , Aeropuertos , Niño , Exposición a Riesgos Ambientales/efectos adversos , Humanos , Ruido del Transporte/efectos adversos , Instituciones Académicas
12.
Balkan Med J ; 38(4): 205-211, 2021 07.
Artículo en Inglés | MEDLINE | ID: mdl-34274909

RESUMEN

The third outbreak of coronavirus in the form of the COVID-19 infection started in Wuhan, China, in December 2019. The early and rapid spread of this infection across borders can be largely attributed to international air travel that has become a part of modern globalization. In this article, we analyze the spread of the novel coronavirus (SARS-CoV-2) along the routes of international travel, both by air and by sea. Pitfalls of various screening methods used at the airports and the importance of optimal aircraft ventilation are discussed. Also, we suggest measures that can be taken to reduce the risk of transmission associated with air travel.


Asunto(s)
COVID-19/epidemiología , Brotes de Enfermedades , SARS-CoV-2 , Viaje , Aeropuertos , COVID-19/prevención & control , COVID-19/transmisión , Salud Global , Humanos
13.
Artículo en Inglés | MEDLINE | ID: mdl-34299850

RESUMEN

Aircraft noise exposure is a health risk and there is evidence that noise annoyance partly mediates the association between noise exposure and stress-related health risks. Thus, approaches to reduce annoyance may be beneficial for health. Annoyance is influenced by manifold non-acoustic factors and perceiving a fair and trustful relationship between the airport and its residents may be one of them. The distribution of aircraft noise exposure can be regarded as a fairness dilemma: while residents living near an airport may seem to have some advantages, the majority of residents living under certain flight routes or in their immediate proximity suffer from the disadvantages of the airport, especially the noise. Moreover, a dilemma exists between the airport's beneficial economic impact for a region and the physical and psychological integrity of residents. Aircraft noise exposure through the lens of social justice research can help to improve our understanding of noise annoyance. Research indicates that the fairness perceptions of the parties involved can be enhanced by (a) improving individual cost-benefit ratios, (b) providing a fair procedure for deciding upon the noise distribution, and (c) implementing fair social interaction with residents. Based on the review of evidence from social justice research, we derive recommendations on how fairness aspects can be integrated into aircraft noise management with the purpose of improving the relationship between the airport and its residents, to reduce annoyance, and to enhance the acceptance of local aviation and the airport as a neighbor.


Asunto(s)
Ruido del Transporte , Aeronaves , Aeropuertos , Exposición a Riesgos Ambientales , Humanos , Ruido del Transporte/efectos adversos , Justicia Social
14.
Sci Total Environ ; 797: 149142, 2021 Nov 25.
Artículo en Inglés | MEDLINE | ID: mdl-34303987

RESUMEN

Airports are a high complex type of projects that are exposed to many disruptiveness. Proper management between airport expansion projects and airport operations is needed to ensure safety and efficiency of the project and the aviation. Scenario-based preference modeling is one of the robustness analysis techniques that describes the influence of disruptive scenarios on the project initiatives across different criteria. A scenario-based preference model was applied in this work to investigate the influence of different scenarios on Kuwait International Airport expansion. Scenario-based preference is a multi-criteria assessment, which allows the involvement of multiple stakeholders. The key target of the model was to illustrate the most and least robust initiatives, and the highest and least ranked initiatives over the scenarios. The analysis also ranked the scenarios based on their level of disruptiveness. The outcomes of this method can be used to mitigate the system and improve the project robustness by understanding each kind of risk impact. The results showed that the most and least disruptive scenarios were S3, economic crisis, and S5, compelling circumstance, and the most robust initiative was x1, completion of the main terminal building (T2). It is important to discuss the contribution and insights extracted from these analyses. For example, showing the most and least disruptive scenarios is not enough. It is important to mention what insights the readers can gain by knowing the importance of these scenarios. It is very important to highlight the significance of the results. The results showed that the most disruptive scenario was economic crisis. This indicates the fact that current Covid 19 pandemic had significantly affected the local economy, reduced country income that is based mainly on oil and consumed considerable budget on medical related activities. This had resulted in a lower expenditure on mega infrastructure projects as the airport, which caused considerable delay and interruption to major activities. Furthermore, the results showed that the most robust initiative was completion of the main terminal building (T2). This is mainly true due to the fact that the government is very keen to complete this major terminal in the airport as it will release the pressure on the old portion of the airport and increase the airport capacity. Based on these facts, it is clear that priorities in airport infrastructure activities and construction initiatives were affected considerably by the global and local circumstances and come first the global pandemic.


Asunto(s)
Aviación , COVID-19 , Aeropuertos , Humanos , Pandemias , SARS-CoV-2
15.
Artículo en Inglés | MEDLINE | ID: mdl-34281143

RESUMEN

The literature on air travellers with psychiatric disorders is limited. This perspective article highlights various travel-related aspects of autism spectrum disorder (ASD). The airport experience can be stressful for families of children with autism spectrum disorder (FwASDs). The aim of this study was to explore the airport experience of FwASDs using the value co-creation process approach to assist airport managers in designing improved experiences for this specific passenger segment. This study responds to the current climate in which airports are developing awareness programmes in relation to children who require special assistance at airports. The prevalence of children with ASD is 1/68. While a number of airports throughout the world have adopted procedures addressing the needs of those with cognitive impairment, these advances are far from universal. As part of an academic-industry collaboration between Vueling airlines and the Spanish airport operator Aena, 25 FwASDs took part in an inclusive airport research project in the city of Barcelona from November 2015 to April 2016. Employing a qualitative methodology that incorporated focus groups, ethnographic techniques, and post-experience surveys, the study contributes to extending the body of knowledge on the management of the value co-creation process for challenging passenger segments within the airport context. The study explains how ensuring adequate resource allocation to this passenger segment can improve the family-inclusive design of the airport experience and offers managerial recommendations.


Asunto(s)
Aeropuertos , Trastorno del Espectro Autista , Trastorno del Espectro Autista/epidemiología , Niño , Humanos , Encuestas y Cuestionarios , Viaje , Enfermedad Relacionada con los Viajes
16.
BMJ Open ; 11(7): e050714, 2021 07 01.
Artículo en Inglés | MEDLINE | ID: mdl-34210736

RESUMEN

OBJECTIVES: The primary objective was to estimate the positivity rate of air travellers coming to Toronto, Canada in September and October 2020, on arrival and on day 7 and day 14. The secondary objectives were to estimate the degree of risk based on country of origin and to assess knowledge and attitudes towards COVID-19 control measures and subjective well-being during the quarantine period. DESIGN: Prospective cohort of arriving international travellers. SETTING: Toronto Pearson Airport Terminal 1, Toronto, Canada. PARTICIPANTS: Participants of this study were passengers arriving on international flights. Inclusion criteria were those aged 18 or older who had a final destination within 100 km of the airport, spoke English or French, and provided consent. Excluded were those taking a connecting flight, had no internet access, exhibited symptoms of COVID-19 on arrival or were exempted from quarantine. MAIN OUTCOME MEASURES: Positive for SARS-CoV-2 virus on reverse transcription PCR with self-administered oral-nasal swab and general well-being using the WHO-5 Well-being Index. RESULTS: Of 16 361 passengers enrolled, 248 (1.5%, 95% CI 1.3% to 1.7%) tested positive. Of these, 167 (67%) were identified on arrival, 67 (27%) on day 7, and 14 (6%) on day 14. The positivity rate increased from 1% in September to 2% in October. Average well-being score declined from 19.8 (out of a maximum of 25) to 15.5 between arrival and day 7 (p<0.001). CONCLUSIONS: A single arrival test will pick up two-thirds of individuals who will become positive by day 14, with most of the rest detected on the second test on day 7. These results support strategies identified through mathematical models that a reduced quarantine combined with testing can be as effective as a 14-day quarantine.


Asunto(s)
COVID-19 , Aeropuertos , Canadá , Estudios de Cohortes , Humanos , Estudios Prospectivos , SARS-CoV-2
17.
Travel Med Infect Dis ; 43: 102127, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34174408

RESUMEN

BACKGROUND: Airport quarantine is required to reduce the risk of entry of travelers infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). However, it is challenging for both high accuracy and rapid turn-around time to coexist in testing; polymerase chain reaction (PCR) is time-consuming with high accuracy, while antigen testing is rapid with less accuracy. However, there are few data on the concordance between PCR and antigen testing. METHODS: Arrivals at three international airports in Japan between July 29 and September 30, 2020 were tested for SARS-CoV-2 using self-collected saliva by a screening strategy with initial chemiluminescent enzyme immunoassay (CLEIA) followed by confirmatory nucleic acid amplification tests (NAAT) only for intermediate range antigen concentrations. RESULTS: Among the 95,457 persons entering Japan during the period, 88,924 (93.2%) were tested by CLEIA, and 0.29% (254/88,924) were found to be SARS-CoV-2 antigen positive (≥4.0 pg/mL). NAAT was required for confirmatory testing in 0.58% (513/88,924) with intermediate antigen concentrations (0.67-4.0 pg/mL) whereby the virus was detected in 6.6% (34/513). This two-step strategy reduced the utilization of NAAT to one out of every 173 test subjects. The estimated performance of this strategy did not show significant increase in false negatives as compared to performing NAAT in all subjects. CONCLUSIONS: Point of care testing by quantitative CLEIA using self-collected saliva is less labor-intensive and yields results rapidly, thus suitable as an initial screening test. Reserving NAAT for CLEIA indeterminate cases may prevent compromising accuracy while significantly improving the logistics of administering mass-screening at large venues.


Asunto(s)
COVID-19 , SARS-CoV-2 , Aeropuertos , Humanos , Cuarentena , Saliva
18.
Bull Entomol Res ; 111(5): 553-559, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34128461

RESUMEN

The vegetation community affects the composition and diversity of the insect community in grasslands. To explore the effects of vegetation management on insect community abundance and diversity, regular mowing of the vegetation was conducted, and tall fescue (Festuca arundinacea) and ryegrass (Lolium perenne) were exclusively planted at Tianjin Binhai International Airport. A total of 1886 insects were collected, representing 8 orders, 23 families, and 29 species; Acrididae (Orthoptera), Coccinellidae (Coleoptera), and Chironomidae (Diptera) were the dominant taxa. The abundance and biomass of insects in the turf areas were significantly lower than those in the control area and were reduced by 45.8 and 48.5% in the ryegrass area, respectively. In all areas, insect abundance and biomass peaked in summer, and the abundance of individuals and taxa decreased as the temperature decreased. Greater diversity and richness were found in summer compared with the other two seasons, and the turf areas had lower diversity and richness indices than the control areas in spring and summer. Our results suggest that the abundance, biomass and diversity of insects can be effectively decreased by artificial regulation of grassland vegetation at the airport, the planting of a single turfgrass - specifically ryegrass had the greatest effect. The present study provides a theoretical basis for the ecological control of insects at the airport.


Asunto(s)
Biodiversidad , Pradera , Insectos/clasificación , Aeropuertos , Animales , Biota , China , Festuca , Lolium , Estaciones del Año
19.
Environ Int ; 156: 106719, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-34166874

RESUMEN

Despite the valuable contributions of scholars to the COVID-19 pandemic, limited scholarly attention has been paid to the opportunities unleashed by the crisis. As many industries have been turned upside down and markets rendered uncertain, the crisis is also propelling waves of innovation activities. In this paper, we developed the concept of "CoviNovation" to denote the firm's innovation emerging from, rooted in or accelerated by the crisis. Our analysis yielded insights on innovations inspired by COVID-19 across the global airline industry, including inflight social distancing, utilizing touchless technologies at airports, disinfecting aircraft with UV, open-middle-seat policy, accelerated use of biometrics in check-in and COVID-19 insurance. The theoretical and practical implications of the COVID-19-inspired innovations examined.


Asunto(s)
COVID-19 , Pandemias , Aeropuertos , Humanos , Industrias , Pandemias/prevención & control , SARS-CoV-2
20.
Artículo en Inglés | MEDLINE | ID: mdl-34073467

RESUMEN

The present study aimed to understand Taiwanese people's willingness to participate in the travel bubble policy. A mixed research method was used to collect 560 questionnaires, and SPSS 22.0 software was used for the statistical validation and Pearson's performance correlation analysis. Expert opinions were collected and the results were validated using multivariate analysis. Findings: People were aware of the seriousness of the virus and the preventive measures but were not afraid of the threat of infection. They looked forward to traveling to heighten their enthusiasm, relieve stress, and soothe their emotions. However, the infection and death rates have been high, there have been various routes of infection, and it has been difficult to identify the symptoms. The complex backgrounds of people coming in and out of airports, hotels and restaurants may create pressure on the participants of events. In addition, the flawed policies and high prices resulted in a loss of confidence in the policies and a wait-and-see attitude toward tourism activities. Thus, travel decisions (0.634), physical and mental health assessment (0.716), and environmental risk (-0.130) were significantly (p < 0.05) related to travel intentions, and different issues were affected to different degrees, while health beliefs had no significant effect (p > 0.05).


Asunto(s)
COVID-19 , Aeropuertos , Miedo , Humanos , SARS-CoV-2 , Viaje
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