Asian Cities Research Articles

Bioavailable fractions of heavy metals in the road dust during infrastructure construction at urban Coimbatore and its potential health implications, India.

Over the past two decades the Global South is witnessing unprecedented economic transformation and Asian Cities in particular have a remarkable upsurge. Coimbatore, an industrial city in Southern India with an estimated population of 2 million (in 2022) is witnessing a rapid transition in terms of infrastructure development. In this context, the present study attempts to assess the particulate matter (PM10 and PM2.5) emissions at road network construction sites and the heavy metal fractionation in the road dust/sediment samples with a core focus to quantify the bioavailable fraction of metals (Fe, Cu, Cr, Cd, Pb and Ni) and its source apportionment in the road side dust/sediment samples. About 60 composite road dust/sediment samples were collected for heavy metal fractionation analysis in the six arterial roads that undergo core developments like construction of road over bridges, additional road incorporation and street expansions. PM monitoring revealed that 24h average PM2.5 (47µg/m3) and PM10 (69µg/m3) concentrations at many construction sites exceeded 24h average recommended by WHO guidelines [PM2.5 (15µg/m3) and PM10 (45µg/m3), respectively]. The bioavailable fractions of Fe, Cu, Cr and Cd are notably higher in the roadside sediment samples at road construction sites. Health Risk assessment, such as carcinogenic risks (Children-4.41 × 10-2, Adult-3.598 × 10-6) and non-carcinogenic risks, inferred substantial risks at high intensity construction sites with statistical analyses, including PCA and cluster analysis, indicating considerable anthropogenic influences in the heavy metal fractions.

Epidemiological characteristics and strategies for prevention and elimination of malaria in Qingdao, Shandong Province, China from 1949 to 2021.

Malaria is an insect-borne disease transmitted by Anopheles mosquitoes or the importation of Plasmodium-infected blood, posing a serious threat to human health and life safety. This study aims to analyze the incidence of malaria in Qingdao at various stages from 1949 to 2021, to collate the control measures taken at different epidemic stages to assess the effectiveness of malaria control, and to identify a set of malaria control strategies suitable for Qingdao, while providing Chinese experience for other countries or cities in their malaria elimination efforts. A retrospective survey was used to collect information on malaria cases, control measures and prevention and control effects in Qingdao from 1949 to 2021, and to evaluate malaria control strategies and measures in Qingdao. 704 155 cases have been reported from 1949 to 2021, with three epidemic peaks: the incidence rate was 1715.9/100 000 in 1961, 1409.7/100 000 in 1965, and the most severe case occurred in 1972, with an incidence rate of 1635.6/100 000 and a case count exceeding 90 000. Throughout the various stages of malaria epidemics, Qingdao has effectively eliminated indigenous malaria by implementing diverse preventive and control measures. Since the last indigenous case of Plasmodium vivax was reported in 2002, all locally reported cases have been imported, mainly by returning migrant workers from Africa. This study examines a range of malaria prevention and control strategies and interventions that are appropriate for Qingdao. These measures have enabled Qingdao to successfully eliminate malaria and maintain malaria-free status for more than 20 years. These measures can also serve as a reference for similarly situated cities in Africa and Southeast Asia.

Health care workers’ self-perceived meaning of residential care work

BackgroundAttracting and supporting a sustainable long-term care (LTC) workforce has been a persistent social policy challenge across the globe. To better attract and retain a sustainable LTC workforce, it is necessary to adopt a unified concept of worker well-being. Meaning of work is an important psychological resource that buffers the negative impacts of adverse working conditions on workers’ motivation, satisfaction, and turnover intention. The aim of this study was to explore the positive meaning of care work with older people and its implications for health care workers’ job satisfaction and motivation to work in the LTC sector.MethodsThis study adopted a qualitative descriptive design that pays particular attention to health care workers; such as nurses, personal care workers; as active agents of the meaning making and reframing of care work in LTC communities in a East Asia city. In-depth semi-structured interviews were conducted with thirty health care workers in LTC communities in Hong Kong. Thematic analysis was employed for data analysis.ResultsThe research findings indicate that while health care workers perform demanding care work and experience external constraints, they actively construct positive meanings of care work with older people as a helping career that enables them to facilitate the comfortable aging of older people, build affectional relationships, achieve professional identity, and gain job security.ConclusionsThis qualitative study explores how health care workers negotiate the positive meaning of older people care work and the implications of meaningful work for workers’ job satisfaction and motivation to work in the LTC sector. The importance of a culturally sensitive perspective in researching and developing social policy intervention are suggested.

The Correlation Between Asian Port Cities and Traditional Portuguese Urban Forms Based on Map and Machine Learning Analyses

In the 16th and 17th centuries, under the influence of the Portuguese Empire’s overseas expansion and cultural integration, the island city of Macau became an important international trading port in the Eastern Sea, with close ties to the Asian port cities governed by Portugal. This study introduces a new method for comparing urban morphological layouts using machine learning and investigates the potential benefits of combining urban morphological analysis with machine learning techniques. In addition, a combination of urban morphology theory and machine learning is used to excise samples of urban morphology from Portuguese urban geographical information maps. The morphological characteristics of port city areas are further extracted, and training labels for typical Portuguese urban textures are established. Using the YOLOv4 object detection algorithm, the results are compared with the urban textures of typical island and port cities of the Asian Silk Road—Goa in India, Malacca in Malaysia, Macau in China, and Dili in Timor-Leste—revealing the similarities and differences among the port cities in Asia influenced by traditional Portuguese urban practices. The results reveal the relationship between maritime trade and urban form.

Environmental Sustainability of Food Environments: Development and Application of a Framework in 4 cities in South Asia

BackgroundFood environments, where people directly engage with broader food systems, may be an important contributor to the environmental sustainability of food systems. ObjectivesThe primary objectives of this study were to establish a new food environment framework that considers environmental indicators and to assess data availability and gaps using data previously collected as part of a food systems survey in 4 South Asian cities. MethodsThe framework was developed by conducting a structured literature review of previous food environment frameworks and in-depth interviews with content experts (n = 6). The framework and indicators were then mapped to data collected by consumer and vendor surveys using the Urban Food Systems Assessment Tool (UFSAT) in Ahmedabad (India), Pune (India), Kathmandu (Nepal), and Pokhara (Nepal). ResultsWe have expanded the sustainability domain within food environments to include consumer travel to food vendors, the presence of food delivery services, policies related to sustainability, vendor food waste, vendor plastic use, vendor utility usage, vendor recycling and waste management practices, and food packaging. Mapping the framework to existing data from 4 cities in South Asia, we found variations in food environment sustainability indicators, particularly regarding consumer transportation to food vendors, the presence of delivery services, and food waste. ConclusionsAlthough the majority of food environment research focuses on the availability and affordability of healthy foods, there is an urgent need to understand better how aspects of food environments contribute to environmental goals. When mapping the framework to existing food systems data, we found gaps in data on environmental sustainability in food environments and variation in indicators across settings.

Analysis of spatial pattern of water supply continuity in an Indian metropolis: a case study of Hyderabad

ABSTRACT Water supply continuity is a crucial indicator of service efficiency. Multiple South Asian cities have Intermittent Water Supply (IWS). Water supply equity in cities depends on the spatial patterns of intermittency. The present study used Kernel Density Estimation (KDE) to investigate the spatial pattern of water supply intermittency for 3071 localities of Hyderabad, India. Further, the relationship between population density and supply continuity has been examined in 146 wards of Hyderabad using Spatial Autocorrelation and Geographically Weighted Regression (GWR). Spatial Autocorrelation defines two distinct clusters of central wards for high continuity (12 wards) and population density (19 wards). However, the ward clusters are different for continuity and density, with only three central wards (2.06% of all wards) being common in both the high-high clusters. The results highlight that the water supply continuity in Hyderabad has minimal consideration for population density, resulting in a spatially inequitable water supply.

Behavior and efficiency analysis of Asian neighborhood transportation based on object detection

The Asian city neighborhood transport is often congested and unbalanced. Hence, it is crucial for the policymakers to study the pattern and effectiveness of transportation in the Asian towns. This paper discussed transportation behaviors of cars, bicycles, and pedestrians on Asian block based on object detection using You Only Look Once (YOLO) algorithm. First, the major transportation objects such as buses and cars were identified through photos and videos of an ordinary Asian neighborhood. Then, the key efficiency indicators of the transport behavior were suggested and the time and road required different metrics were calculated. Lastly, diverse behavior patterns have been analyzed, and optimization suggestions based on the findings are being proposed. The result of the application was that various means of transportation in a certain neighborhood differed in terms of efficiency due to the behavior patterns, and object detection method was a suitable tool to find the suggestions about traffic management, safety, and city infrastructure.

Examining the impact of digital information environments, information processing, and presumed influence on behavioral responses to COVID-19 misinformation in Asia

This study examines exposure to, perception of, and behavioral responses to misinformation about COVID-19 on social media from the influence of presumed influence (IPI) framework. To understand how the digital information environment of a society shapes the spread and responses to pandemic misinformation, four culturally similar Asian cities—Beijing, Hong Kong, Singapore, and Taipei—were selected, generating a sample of 4094 respondents. Our findings suggest a paradox—the more information respondents in the four cities have access to, the less likely they are to view misinformation on COVID-19 and accept it as true without elaboration. Moreover, the study extends IPI theory by demonstrating negative emotions as a mechanism that mediates the relationship between perceived social impact and behavioral intentions. That is, the more respondents perceived misinformation to be harmful, the more negatively they felt about misinformation, which led to greater likelihood of taking restrictive, promotional, and corrective actions.

Unlocking urban charm for liveable street: transformative design strategies to boost pedestrian appeal in Asian cities

Walking as a mode of transportation faces challenges in Asian cities due to the proliferation of private motorized vehicles and lacking public transportation management. Despite contributing to people’s physical and mental well-being, walking is often considered the last option for transportation. Previous research has highlighted the link between walking, urban design qualities, individual reactions, and a sense of place. Other studies have suggested that a sense of place fosters a sense of belonging and attachment to the location. This paper aims to propose transformative design strategies to enhance pedestrians’ willingness to walk through the design of street junctions. Street junctions, especially those featuring corner buildings, offer opportunities for walking, observing, and resting, all of which are crucial elements for vibrant public spaces. The findings reveal that street junctions in cities like Surabaya (Indonesia) are predominantly perceived as “spaces to move” rather than “places to be.” To advance walkability in street junctions, transformative design strategies need to be addressed. Encouraging pedestrians’ willingness to walk can focus on their experiences and perceptual qualities. Developing policies aimed at enhancing street junctions in Asian cities emerges as a pivotal strategy for strengthening a culture of walking.

The production of Asian public space: the role of the transnational developer

ABSTRACT Accounts of projects generally credit design vision to the landscape architect or architect, relegating the role of the developer to the client. This essay offers an alternative perspective, arguing for the recognition of the Asian developer as an agent of transnational design innovation. While there has been ample discussion of the wealth to be made in the Asian property market, little attention has been paid to the developer’s motives and ambitions beyond economic gain. Through the discussion of two transnational development companies, CapitaLand and Swire Properties, we demonstrate the role these Asian-based developers have played in establishing an emerging urban public domain in some dense Asian cities.

Dynamics of energy transition and climate actions on sustainable cities: A cross country comparison of East Asia and Pacific

AbstractMassive energy consumption and poor regulatory framework in urban areas have created environmental slums and are a serious threat to sustainability. East Asian and Pacific economies are vulnerable to climate crises and striving for sustainability by transition to green energy and taking climate initiatives. In the past, no study has explored the effectiveness of energy transitions and climate actions in the context of East Asia and Pacific. To understand the effectiveness of these efforts, this study has been planned and executed to examine the impact of energy transition and climate actions, along with emissions from residential and commercial buildings, per capita income, and effective governance, on sustainable cities and communities in East Asia and the Pacific region. The study utilizes panel data of six high‐income countries and 11 lower‐middle and upper‐middle income countries from 2000 to 2022 for comparative empirical analysis. Empirical analysis is performed using truncated regression due to the nature of the data. The study found that energy transition, climate actions, and governance effectiveness increase the sustainability of cities and communities. However, emissions from residential buildings and per capita income adversely affect the sustainability of cities and communities. Furthermore, the dynamics of energy transition and climate change vary according to the income classifications of East Asian and Pacific countries. Energy transition and emissions showed a higher impact in HICs, while climate actions were more resilient in lower‐middle and upper‐middle income countries. These findings emphasize the transition to clean and green energy, prompt climate policy actions, and effective governance to ensure sustainability in East Asian and Pacific cities and communities.

Long-term trends of vegetation greenness under different urban development intensities in 889 global cities

Long-term trends in urban vegetation greenness were systematically analyzed. However, long-term trends in vegetation greenness under different urban development intensities (UDIs) in global cities remain poorly understood. In this study, exurban, suburban, urban and urban core areas were defined according to their UDI in 2001. Subsequently, changes in the UDI and long-term trends in vegetation greenness were analyzed in these four areas in 889 global cities from 2001 to 2019. African and Asian cities have witnessed rapid urbanization, whereas European cities have experienced slow urbanization. The UDI increased significantly in suburban, exurban and urban areas, whereas it remained stable in urban core areas. The enhanced vegetation index (EVI) and normalized difference vegetation index (NDVI) increased in all four areas in European cities but decreased in all four areas of the African cities. The EVI and NDVI decreased in suburban and urban areas due to urbanization, but increased in exurban, and urban core areas. Changes in UDI were an important driver of EVI and NDVI trends in exurban and suburban areas. The results of this study enhance our understanding of long-term trends in vegetation greenness in urban and surrounding areas.

Dark tourism: The effect of visiting a mausoleum on a tourist’s psychological mood state in the central Asian city of Samarkand, Uzbekistan

This paper examines the psychological effects of dark tourism by analyzing the feelings and emotions of domestic and international tourists who visited a mausoleum. Dark tourism sites have received considerable attention as a growing phenomenon in the 21st century. Dark tourism is associated with death, disasters, and atrocities; and includes places such as murder sites, battlefields, cemeteries, and places where tragedies have taken place. The Gur-e-Amir Mausoleum in the Central Asian city of Samarkand in Uzbekistan was chosen as a dark tourism site. A convenience sample of 21 visitors, of which 10 were international travelers and 11 were from Central Asian countries, agreed to be individually interviewed using a qualitative methodology. The results found that a range of emotions were expressed during the visit, with the majority of visitors expressing positive emotions on a scale from good to great, which included feelings of contentment, astonishment, excitement, and admiration at the conclusion of their visit. For many of the local visitors of the Islamic faith, it also provided a religious experience that for, some included prayer and meditation.

Social Class, Gender and Psychological Distress in Mumbai: Risk and Protective Factors

BACKGROUND: Common mental disorders contribute to a large proportion of the non-fatal disease burden in India. Mumbai is among the most crowded cities in Asia with half the population housed in slums creating an environment of vulnerability. In this context, the risks and protective factors associated with depression symptoms are explored by investigating the role of social class and gender in Mumbai. METHODS: 491lower income and 326 middle income respondents were screened for depressive symptoms and compared on 4 subscales of the GHQ 28: somatization, anxiety, social dysfunction and severe depression. RESULTS: The relative risk (RR) of depressive symptoms for lower income individuals was 1.27. The relative risk associated with being female was 1.04 in the lower income group and 1.55 in the middle-income group. Apart from stress and perceived health which proved to be significant predictors for every sub scale, hope emerged as a protective variable for somatization and severe depression, positive emotional style emerged as a protective factor against anxiety and severe depression and tobacco was found to be a risk factor for social dysfunction. CONCLUSION: The incidence of depressive symptoms was the highest for middle income women. This work provides insights from an intersectional framework of class and gender. The inclusion of positive variables in conjunction with risk factors highlight the role of positive protective factors such as hope and positive emotional style for mental health.

Rebuilding life after slavery. Manumission, emancipation, and family networks in European empires, 1750–1900

Wherever and whenever systems of slavery existed, enslaved people struggled to attain freedom. Spanning various imperial contexts from 1750 to 1920, this special issue convenes a team of scholars to investigate the aftermath of emancipation. What did freedom from slavery entail in deeply unequal colonial societies? This issue explores diverse experiences, from maroon communities in the Caribbean wilderness to the forced resettlement of freed slaves in European colonies in Africa, and the legal emancipation of slaves in segregated colonial port cities in Asia. Enslaved people encountered ‘freedom’ with its attendant threats and opportunities in myriad ways. Building on the rich historiographical tradition of slavery studies, this special issue aims to broaden the scope of historical research from the slave trade and the lives of enslaved individuals to their post-emancipation existence. However, even recent literature often treats freedom after abolition and manumission as distinct phenomena, representing different legal paths to freedom—one associated with the early modern period and the other with the nineteenth century. This special issue re-evaluates this presupposition by foregrounding the post-emancipation life events of formerly enslaved individuals. It questions whether and how these different transitions from slave status to freedom can and should be structurally compared in slavery studies. By tapping into previously unexplored sources, re-examining older datasets with fresh perspectives, and employing record linkage to uncover forgotten slave histories, the authors seek to assess the living conditions of formerly enslaved people and their direct descendants after emancipation. In doing so, we aim to explore how past experiences of enslavement influenced future life choices and opportunities, thereby questioning the so-called afterlives of slavery.

A Proposal for the Identity of the Inner Asian City of Ornas (Hornach) Mentioned in Thirteenth-Century Latin Sources

Ornas (also Hornach) appears in the mentions of several Latin authors in the mid-thirteenth century as an important city deep in Asia that had been conquered by the Mongols. There have been several past suggestions by scholars for its identity; the scattered mentions of Ornas (Hornach) have been variously suggested to refer to Tana, Otrar, or Konye-Urgench. The present paper argues that these references, though confused on matters of geography since the Western European authors were writing about largely unknown regions that they did not personally visit, are typically references to the city of Konye-Urgench. The Latin authors’ descriptions of its fall to the Mongols unquestionably draw parallels with Middle Eastern, Rus’, Chinese, and Mongol accounts. This paper argues that the Latin references to Ornas’ proximity to a nearby sea are related to the Aral Sea which had southerly stretches very close to Konya-Urgench as is indicated, for instance from Russian survey maps of the nineteenth century. This identification allows us to place John of Plano Carpini’s description of the fall of Ornas within a larger, cohesive narrative which, though confused on points, offers insights on the fall of the Khwarazmian Empire in the early 1220s.

Disentangling the biotic and abiotic drivers of bird-building collisions in a tropical Asian city with ecological niche modeling.

Bird collisions with buildings are responsible for a large number of bird deaths in cities around the world, yet they remain poorly studied outside North America. We conducted one of the first citywide fine-scale and landscape-scale analyses of bird-building collisions in Asia and used maximum entropy modeling (as commonly applied to species distribution modeling) in a novel way to assess the drivers of bird-building collisions in the tropical city-state of Singapore. We combined 7years of community science observations with publicly available building and remote sensing data. Drivers of bird-building collisions varied among taxa. Some migratory taxa had a higher relative collision risk that was linked to areas with high building densities and high levels of nocturnal blue light pollution. Nonmigratory taxa had a higher collision risk in areas near forest cover. Projecting our results onto official long-term land-use plans, we predicted that future increases in bird-building collision risk stemmed from increases in blue light pollution and encroachment of buildings into forested areas and identified 6 potential collision hotspots linked to future developments. Our results suggest that bird-building collision mitigation measures need to account for the different drivers of collision for resident and migratory species and show that combining community science and ecological modeling can be a powerful approach for analyzing bird-building collision data.

“Adaptive” and “Universal” Approaches by V.P. Kalmykov and V.A. Lavrov on the Example of the Architectural and Spatial Organization of a Quarter in the Projects of Central Asian Socialist Cities

“Adaptive” and “Universal” Approaches by V.P. Kalmykov and V.A. Lavrov on the Example of the Architectural and Spatial Organization of a Quarter in the Projects of Central Asian Socialist Cities

The Rubber Stock Boom in Shanghai and the Kadoorie Enterprises, 1910–1949

ABSTRACT Drawing on rarely used primary sources and grounded in a broad historical framework, this article reveals the dynamic history of the Rubber Trust Company Limited in Shanghai and examines how its founders, the Kadoories, used unique colonial spaces to tap and store wealth across political borders. The article thereby not only provides an alternative perspective to the history of the Baghdadi Jews and their extensive networks across Asian port cities, but also reveals how the cross-border Kadoorie enterprises and the colonial tools they used ensured the family’s survival in the face of Shanghai’s political and economic transformation. By filling crucial gaps in scholarly knowledge on the Kadoories and their investments through their Rubber Trust Company Limited, this article advances our understanding of the business world in Shanghai from the 1910s to the 1940s.

Understanding the impact of network structure on air travel pattern at different scales.

This study examines the global air travel demand pattern using complex network analysis. Using the data for the top 50 airports based on passenger volume rankings, we investigate the relationship between network measures of nodes (airports) in the global flight network and their passenger volume. The analysis explores the network measures at various spatial scales, from individual airports to metropolitan areas and countries. Different attributes, such as flight route length and the number of airlines, are considered in the analysis. Certain attributes are found to be more relevant than others, and specific network measure models are found to better capture the dynamics of global air travel demand than others. Among the models, PageRank is found to be the most correlated with total passenger volume. Moreover, distance-based measures perform worse than the ones emphasising the number of airlines, particularly those counting the number of airlines operating a route, including codeshare. Using the PageRank score weighted by the number of airlines, we find that airports in Asian cities tend to have more traffic than expected, while European and North American airports have the potential to attract more passenger volume given their connectivity pattern. Additionally, we combine the network measures with socio-economic variables such as population and GDP to show that the network measures could greatly augment the traditional approaches to modelling and predicting air travel demand. We'll also briefly discuss the implications of the findings in this study for airport planning and airline industry strategy.