Urban Concentration and Civil War

2019 ◽  
Vol 64 (6) ◽  
pp. 1146-1171
Author(s):  
Dani Nedal ◽  
Megan Stewart ◽  
Michael Weintraub
Keyword(s):  
Civil Wars ◽  
Rural Areas ◽  
Urban Environments ◽  
Urban Centers ◽  
Crucial Effect ◽  
Battle Deaths ◽  
Intrastate War ◽  
Military Strength ◽  
Urban Concentration ◽  
Urban Warfare

The explosion of cities and megacities has increased scholars’ and policy markers’ attention to the effects such changes might have on conflict: increasingly, urban environments may alter the nature of warfare but not necessarily the incidence of intrastate war. We argue that high levels of urban concentration—the concentration of populations in one or relatively few urban centers—increases both the likelihood of civil wars and their intensity. Urban concentration limits the ability of the state to project power across space, exacerbating grievances in rural areas, easing rebel control of territory, and enhancing their military strength. At the same time, cities become high-value loci of contestation even as urban warfare constrains conventional state military strength. The result is more symmetrical fighting producing more battle deaths. Cross-national regressions show that urban concentration exerts a crucial effect on the likelihood, nature, and intensity of intrastate warfare.

Socio-Economic Characteristics of Immigrants in Western Greece Region: Urban – Rural Continuum or Divide?

2006 ◽  
Vol 3 (2) ◽  
pp. 91-105 ◽  
Author(s):  
Theodoros Iosifides ◽  
Thanasis Kizos ◽  
Elektra Petracou ◽  
Ekaterini Malliotaki ◽  
Konstantina Katsimantou ◽  
...  
Keyword(s):  
Rural Areas ◽  
Urban Centers ◽  
Spatial Factors ◽  
Limited Role ◽  
Urban Rural ◽  
Of Greece ◽  
Western Greece

This paper aims at an investigation of factors of differentiation of basic social and economic characteristics of foreign immigrants in the Region of Western Greece. The paper explores whether the thesis of urban-rural divide is relevant for the differentiation of immigrants’ socio-economic characteristics in a typical Region of Greece, where there is a strong interplay between major urban centers and large rural areas. Findings show that spatial factors play a very limited role in the differentiation of socio-economic characteristics of immigrants and indicate that other factors are more important. Thus, and as regards socio-economic characteristics of immigrants, the overall picture is that of urban-rural continuum rather than divide. 

Damage assessment mapping of rural environments; integration of SAR and Optical data

2021 ◽  
Author(s):  
Shiran Havivi ◽  
Stanley R. Rotman ◽  
Dan G. Blumberg ◽  
Shimrit Maman
Keyword(s):  
Natural Disaster ◽  
Rural Areas ◽  
Urban Areas ◽  
Damage Assessment ◽  
Vegetation Index ◽  
Urban Environments ◽  
Optical Data ◽  
Damage Level ◽  
Rural Environments ◽  
Rural And Urban

<p>The damage caused by a natural disaster in rural areas differs in nature, extent, landscape and in structure, from the damage in urban environments. Previous and current studies focus mainly on mapping damaged structures in urban areas after catastrophe events such as an earthquake or tsunami. Yet, research focusing on the damage level or its distribution in rural areas is absent. In order to apply an emergency response and for effective disaster management, it is necessary to understand and characterize the nature of the damage in each different environment. </p><p>Havivi et al. (2018), published a damage assessment algorithm that makes use of SAR images combined with optical data, for rapid mapping and compiling a damage assessment map following a natural disaster. The affected areas are analyzed using interferometric SAR (InSAR) coherence. To overcome the loss of coherence caused by changes in vegetation, optical images are used to produce a mask by computing the Normalized Difference Vegetation Index (NDVI) and removing the vegetated area from the scene. Due to the differences in geomorphological settings and landuse\landcover between rural and urban settlements, the above algorithm is modified and adjusted by inserting the Modified Normalized Difference Water Index (MNDWI) to better suit rural environments and their unique response after a disaster. MNDWI is used for detection, identification and extraction of waterbodies (such as irrigation canals, streams, rivers, lakes, etc.), allowing their removal which causes lack of coherence at the post stage of the event. Furthermore, it is used as an indicator for highlighting prone regions that might be severely affected pre disaster event. Thresholds are determined for the co-event coherence map (≤ 0.5), the NDVI (≥ 0.4) and the MNDWI (≥ 0), and the three layers are combined into one. Based on the combined map, a damage assessment map is generated. </p><p>As a case study, this algorithm was applied to the areas affected by multi-hazard event, following the Sulawesi earthquake and subsequent tsunami in Palu, Indonesia, which occurred on September 28th, 2018. High-resolution COSMO-SkyMed images pre and post the event, alongside a Sentinel-2 image pre- event are used as inputs. The output damage assessment map provides a quantitative assessment and spatial distribution of the damage in both the rural and urban environments. The results highlight the applicability of the algorithm for a variety of disaster events and sensors. In addition, the results enhance the contribution of the water component to the analysis pre and post the event in rural areas. Thus, while in urban regions the spatial extent of the damage will occur in its proximity to the coastline or the fault, rural regions, even in significant distance will experience extensive damage due secondary hazards as liquefaction processes.     </p>

scholarly journals Israeli Arabs develop diverticulitis at a younger age and are more likely to require surgery than Jews

2015 ◽  
Vol 28 (2) ◽  
pp. 102-104
Author(s):  
Itai GHERSIN ◽  
Nadav SLIJPER ◽  
Gideon SROKA ◽  
Ibrahim MATTER
Keyword(s):  
Surgical Treatment ◽  
Racial Differences ◽  
Rural Areas ◽  
Age Of Onset ◽  
Acute Diverticulitis ◽  
First Episode ◽  
Urban Centers ◽  
Younger Age ◽  
Israeli Arabs ◽  
The Impact

BACKGROUND: Only few studies have examined the impact of racial differences on the age of onset, course and outcomes of diverticulitis. AIM: To provide data about the epidemiology of diverticulitis in northern Israel, and to determine whether ethnicity is a predictor of age of onset, complications, and need for surgery. METHODS: Was conducted a retrospective review of the charts of all patients diagnosed with a first episode of diverticulitis in our hospital between 2005 and 2012. RESULTS: Were found 638 patients with a first episode of acute diverticulitis in the eight year interval. Israeli Arabs developed a first episode of diverticulitis at a younger age compared to Jews (51.2 vs 63.8 years, p<0.01). Arabs living in rural areas developed diverticulitis at a younger age than Arabs living in urban centers (49.4 vs 54.5 years, P=0.03). Jewish and Arabic men developed diverticulitis at younger age compared to their female counterparts (59.9 vs 66.09, p<0.01, and 47.31 vs 56.93, p<0.01, respectively). Arabs were more likely [odds ratio (OR)=1.81 ,95% confidence interval (CI)1.12-2.90, p=0.017] than Jews to require surgical treatment (urgent or elective) for diverticulitis. CONCLUSIONS: Israeli Arabs tend to develop diverticulitis at a younger age and are more likely to require surgical treatment for diverticulitis compared to Jews. Arabs living in rural areas develop diverticulitis at a younger age than Arabs living in urban centers. These findings highlight a need to address the root cause for ethnic differences in onset, course and outcome of acute diverticulitis.

scholarly journals Tolerance to Human Presence, a Comparison between Rural and Urban Birds in Southeastern Brazil

2021 ◽  
Vol 2 (3) ◽  
pp. 1-4
Author(s):  
Maria Cecília Barbosa de Toledo
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Bird Species ◽  
Urban Environments ◽  
Southeastern Brazil ◽  
Special Focus ◽  
Forest Fragments ◽  
Urban Birds ◽  
Human Presence ◽  
Individual Bird

Green urban areas such as parks, squares, gardens, and forest fragments present a large diversity of uses and conservation objectives. These spaces provide resources for many species of birds that are confronted with the necessity of living in proximity to humans. It is assumed that bird species that acquire resources in urban environments live in a constant state of fear to guarantee survival and reproduction. In this context, the objective of this study was to evaluate the tolerance of birds with respect to human presence in two distinct conditions, rural areas (low level of human presence) and urban areas (high level of human presence). The fieldwork was conducted in a city in the Southeast region of Brazil, and the methodology used the alert distance and flight initiation measurements based on the approach of an observer to the individual bird being focused. Our results suggest that individuals observed in urban areas rely on shorter alert and escape distances, especially males, adults, and birds that forage in interspecific flocks. We discuss the challenges and strategies with respect to escape characteristics of urban birds, with special focus on the economic escape theory. In general, our results support those from studies conducted in other urban areas in different biogeographic regions, and they will aid in comprehending the impacts caused by the increase in urban areas around the world.

Follow-up of Children With Trait in a Rural Setting

PEDIATRICS ◽  
1989 ◽  
Vol 83 (5) ◽  
pp. 876-877
Author(s):  
Herman Harris
Keyword(s):  
Sickle Cell ◽  
Rural Areas ◽  
Urban Areas ◽  
Cost Effective ◽  
Rural Setting ◽  
Urban Centers ◽  
Hb S ◽  
The Individual ◽  
Limited Testing

The Comprehensive Sickle Cell Centers were established in 1972 to test, educate, counsel, and research sickle cell anemia and related hemoglobinopathies. Standards and protocols for testing, education, and research were readily established because similar procedures and methods were already in operation at the institutions where the centers were located. The most difficult and still the most controversial program to provide is counseling. It became evident, early, that there is no universally accepted method for informing carriers of abnormal Hb S about their results. Centers located in large urban areas with a limited testing radius do not face the same problems as centers located in rural areas where the testing radius may cover an entire state or several states. Individual, or one-on-one, counseling of persons with trait results appears to be successful for urban centers where the individual may be called to the center and given information. But, in a rural setting, it is not feasible for the center to ask a person to travel 350 miles to be told he or she has nothing to worry about. And it is not cost-effective to send a caseworker 350 miles to say the same thing. It must, therefore, be concluded that each agency or center must adopt counseling methods that meet its specific needs. Each program must be flexible, imaginative, and creative and must successfully and accurately deliver information about being a carrier for the sickle gene or other hemoglobinopathy and its implication and significance for patients and their future offspring. To do this, we must first look at the problems facing us.

Out-migration in Uttarakhand Himalaya: its types, reasons, and consequences

2021 ◽  
Vol 18 (3) ◽  
pp. 281-295
Author(s):  
Vishwambhar Prasad Sati
Keyword(s):  
Rural Development ◽  
Rural Areas ◽  
The State ◽  
Interim Report ◽  
Urban Centers ◽  
Secondary Sources ◽  
The Status ◽  
And Migration ◽  
Uttarakhand Himalaya

This study examines the types, reasons, and consequences of out-migration in the Uttarakhand Himalaya. Data were collected from secondary sources, mainly from an interim report on the status of migration in revenue villages of Uttarakhand, published by the ‘Rural Development and Migration Commission, Pauri Garhwal, Uttarakhand’ in 2018. The district-wise analysis was carried out on the types of migration, reasons for migration, age-wise migration, the destination of migrants, and migration’s consequences in terms of depopulation in rural areas. Further, a case study of a village was carried out. The study reveals that in three districts – Pauri, Tehri, and Almora, more than 10% population out-migrated after 2011. Similarly, an exodus migration took place from more than 10% of villages of the same districts. This study further shows that migration is mainly internal – from the mountainous districts to urban centers, within the districts or within the state. About 734 villages are depopulated, and in 367 villages, the population has decreased by more than 50%. Unemployment is the major problem in rural areas as more than 50% of out-migration occurred for employment. 

Transformation of Rural Areas with High Urban Impact: the Example of the Largest Cities in the Warmia and Mazury Region

2017 ◽  
Author(s):  
Agnieszka Szczepanska ◽  
Monika Wasilewicz-Pszczółkowska ◽  
Iwona Krzywnicka ◽  
Adam Senetra
Keyword(s):  
Rural Areas ◽  
Demographic Changes ◽  
Landscape Changes ◽  
Urban Centers ◽  
Urban Impact ◽  
Suburban Areas ◽  
Spatial Changes ◽  
Rural Municipalities ◽  
Administrative Units ◽  
The City

The paper discusses rural transformations resulting from urban influences. The analyzed area consists of rural municipalities (the smallest administrative units in Poland) in the immediate vicinity of Olsztyn, Elblag and Ełk – the largest cities in Warmia and Mazury. The type and rate of social and spatial changes in rural areas with high urban impact were analyzed. The following issues have been addressed: – a comparison between demographic changes in rural municipalities neighboring on urban centres and demographic changes in the city, – changes in the land use structure of rural municipalities neighboring on urban centers, with particular emphasis on open and protected spaces, – architectural changes in the analyzed suburban areas, – landscape changes in the analyzed suburban areas.

Paradoxical Payoffs: Migrant Women, Informal Sector Work, and Hiv/Aids in South Africa

2007 ◽  
Vol 17 (2) ◽  
pp. 71-82 ◽  
Author(s):  
Gayatri Singh
Keyword(s):  
South Africa ◽  
Informal Sector ◽  
Rural Areas ◽  
Significant Rise ◽  
African Women ◽  
Simultaneous Increase ◽  
Migrant Women ◽  
Urban Centers ◽  
Black African ◽  
Hiv Aids

In post-apartheid South Africa, there has been a significant rise in women's out-migration from rural areas and across its territorial borders for economic purposes resulting in gender reconfiguration of migration streams. Alongside, there has been a simultaneous increase in the participation of women in the labor force. However, this has mostly grown in the informal sector,1 which is often associated with low earnings and insecure working conditions. One consequence has been the increasing reliance of migrant women on survivalist activities such as informal sexual exchanges that increase their risk of contracting HIV infection. Insecure working environments also expose migrant women to sexual abuses. This article is based on the author's work in South Africa's major urban centers and examines the nature of the relationship between the increased migration of black African women in South Africa, the nature of their work, and their resultant vulnerability to HIV/AIDS.

scholarly journals Evaluation of Tire Wear Contribution to PM2.5 in Urban Environments

Atmosphere ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 99 ◽  
Author(s):  
Julie Panko ◽  
Kristen Hitchcock ◽  
Gary Fuller ◽  
David Green
Keyword(s):  
Los Angeles ◽  
Road Dust ◽  
Ambient Air ◽  
Urban Environments ◽  
Exhaust Emission ◽  
Potential Contribution ◽  
Urban Centers ◽  
Vehicle Traffic ◽  
Road Pavement ◽  
Tire Wear

Vehicle-related particulate matter (PM) emissions may arise from both exhaust and non-exhaust mechanisms, such as brake wear, tire wear, and road pavement abrasion, each of which may be emitted directly and indirectly through resuspension of settled road dust. Several researchers have indicated that the proportion of PM2.5 attributable to vehicle traffic will increasingly come from non-exhaust sources. Currently, very little empirical data is available to characterize tire and road wear particles (TRWP) in the PM2.5 fraction. As such, this study was undertaken to quantify TRWP in PM2.5 at roadside locations in urban centers including London, Tokyo and Los Angeles, where vehicle traffic is an important contributor to ambient air PM. The samples were analyzed using validated chemical markers for tire tread polymer based on a pyrolysis technique. Results indicated that TRWP concentrations in the PM2.5 fraction were low, with averages ranging from < 0.004 to 0.10 µg/m3, representing an average contribution to total PM2.5 of 0.27%. The TRWP levels in PM2.5 were significantly different between the three cities, with significant differences between London and Los Angeles and Tokyo and Los Angeles. There was no significant correlation between TRWP in PM2.5 and traffic count. This study provides an initial dataset to understand potential human exposure to airborne TRWP and the potential contribution of this non-exhaust emission source to total PM2.5.

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