Urbanisation in Developing Economies: building cities that work

This paper reviews recent work on the economics of fast growing developing country cities, with a focus on Africa. It sets out some of the broad facts about African urbanisation and summarises two recent pieces of research work. The first argues that coordination failure can create multiple equilibria and divergent paths of development, some in which cities are internationally competitive and able to create jobs, others in which cities are stuck in a ‘nono-tradables trap’. The second is a dynamic model of city growth, calibrated to changing patterns of land-use in Nairobi; the calibration suggests a very high cost of inefficient land use in the context of urban slums.

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Valid Signature Detection and Verification for Security of Individual Person

Circulation in Computer Science ◽

10.22632/ccs-2016-251-26 ◽

2016 ◽

Vol 1 (1) ◽

pp. 50-53 ◽

Cited By ~ 1

Author(s):

Varun Sharma ◽

Narpat Singh

Keyword(s):

Neural Network ◽

Comparative Analysis ◽

Recent Work ◽

Research Work ◽

Early Research ◽

Individual Person ◽

Signature Detection ◽

Online Signature ◽

The Right ◽

Handwritten Signature

In the recent research work, the handwritten signature is a suitable field to detection of valid signature from different environment such online signature and offline signature. In early research work, a lot of unauthorized person put the signature and theft the data in illegal manner from organization or industries. So we have to need identify, the right person on the basis of various parameters that can be detected. In this paper, we have proposed two methods namely LDA and Neural Network for the offline signature from the scan signature image. For efficient research, we have focused the comparative analysis in terms of FRR, SSIM, MSE, and PSNR. These parameters are compared with the early work and the recent work. Our proposed work is more effective and provides the suitable result through our method which leads to existing work. Our method will help to find legal signature of authorized use for security and avoid illegal work.

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Geomorphology and Landslide-Prone Area in Cisolok District, Sukabumi Regency

E3S Web of Conferences ◽

10.1051/e3sconf/201912501005 ◽

2019 ◽

Vol 125 ◽

pp. 01005 ◽

Cited By ~ 1

Author(s):

Mochamad Seandy Alfarabi ◽

Supriatna ◽

Masita Dwi Mandini Manessa ◽

Andry Rustanto ◽

Yoanna Ristya

Keyword(s):

Land Use ◽

Road Network ◽

Geological Structure ◽

Overlay Analysis ◽

Stream Network ◽

Prone Area ◽

Steep Topography ◽

Physical Variables ◽

Natural Characteristics ◽

Very High

Sukabumi District located in Southern West Java known as a region that has diverse natural characteristics, however, it is vulnerable to disasters, especially landslides. Moreover, this study focuses on Cisolok District because this region always occurred landslides every year due to topography aspect. The aim of this study is to analyze the influence of geomorphology to landslide-prone area in Cisolok District to reduce landslides. This study used overlay analysis for geomorphology mapping, while the Frequency Ratio (FR) method used for landslide-prone area mapping. Several physical variables used in this study such as slope, elevation, lithology, geological structure, road network, stream network, land use, soil type, rainfall, and landslide location. The result shows that the study areas have diverse geomorphology units dominated by volcanic slope with steep topography. While landslide-prone area consist of four classes : namely 17,03% low, 62,05% medium, 14,4% high, and 6,51% very high. Variety of landslide vulnerability in study area influenced by terrain form, land genesis, and geomorphic process.

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Land Use and Land Cover Change Assessment in the Context of Flood Hazard in Lagos State, Nigeria

Water ◽

10.3390/w13081105 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1105

Author(s):

Dorcas Idowu ◽

Wendy Zhou

Keyword(s):

Land Use ◽

Land Cover ◽

Flood Hazard ◽

The State ◽

Land Cover Type ◽

Lulc Change ◽

Cover Type ◽

Lulc Changes ◽

Lagos State ◽

Very High

Incessant flooding is a major hazard in Lagos State, Nigeria, occurring concurrently with increased urbanization and urban expansion rate. Consequently, there is a need for an assessment of Land Use and Land Cover (LULC) changes over time in the context of flood hazard mapping to evaluate the possible causes of flood increment in the State. Four major land cover types (water, wetland, vegetation, and developed) were mapped and analyzed over 35 years in the study area. We introduced a map-matrix-based, post-classification LULC change detection method to estimate multi-year land cover changes between 1986 and 2000, 2000 and 2016, 2016 and 2020, and 1986 and 2020. Seven criteria were identified as potential causative factors responsible for the increasing flood hazards in the study area. Their weights were estimated using a combined (hybrid) Analytical Hierarchy Process (AHP) and Shannon Entropy weighting method. The resulting flood hazard categories were very high, high, moderate, low, and very low hazard levels. Analysis of the LULC change in the context of flood hazard suggests that most changes in LULC result in the conversion of wetland areas into developed areas and unplanned development in very high to moderate flood hazard zones. There was a 69% decrease in wetland and 94% increase in the developed area during the 35 years. While wetland was a primary land cover type in 1986, it became the least land cover type in 2020. These LULC changes could be responsible for the rise in flooding in the State.

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Greenhouse gas emissions from the water–air interface of a grassland river: a case study of the Xilin River

Scientific Reports ◽

10.1038/s41598-021-81658-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Xue Hao ◽

Yu Ruihong ◽

Zhang Zhuangzhuang ◽

Qi Zhen ◽

Lu Xixi ◽

...

Keyword(s):

Carbon Dioxide ◽

Land Use ◽

Nitrous Oxide ◽

Greenhouse Gas Emissions ◽

Greenhouse Gas ◽

Ghg Emissions ◽

Nitrous Oxide Emissions ◽

Gas Emissions ◽

Sand Land ◽

Very High

AbstractGreenhouse gas (GHG) emissions from rivers and lakes have been shown to significantly contribute to global carbon and nitrogen cycling. In spatiotemporal-variable and human-impacted rivers in the grassland region, simultaneous carbon dioxide, methane and nitrous oxide emissions and their relationships under the different land use types are poorly documented. This research estimated greenhouse gas (CO2, CH4, N2O) emissions in the Xilin River of Inner Mongolia of China using direct measurements from 18 field campaigns under seven land use type (such as swamp, sand land, grassland, pond, reservoir, lake, waste water) conducted in 2018. The results showed that CO2 emissions were higher in June and August, mainly affected by pH and DO. Emissions of CH4 and N2O were higher in October, which were influenced by TN and TP. According to global warming potential, CO2 emissions accounted for 63.35% of the three GHG emissions, and CH4 and N2O emissions accounted for 35.98% and 0.66% in the Xilin river, respectively. Under the influence of different degrees of human-impact, the amount of CO2 emissions in the sand land type was very high, however, CH4 emissions and N2O emissions were very high in the artificial pond and the wastewater, respectively. For natural river, the greenhouse gas emissions from the reservoir and sand land were both low. The Xilin river was observed to be a source of carbon dioxide and methane, and the lake was a sink for nitrous oxide.

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Apostle to the Gentiles: Constructions of Paul's Identity

Biblical Interpretation ◽

10.1163/1568515054388146 ◽

2005 ◽

Vol 13 (3) ◽

pp. 270-288 ◽

Cited By ~ 1

Author(s):

Caroline Johnson Hodge

Keyword(s):

Critical Race Theory ◽

Dynamic Model ◽

Recent Work ◽

Division Of Labor ◽

Multiple Identities ◽

Race Theory ◽

Ethnic Boundaries ◽

In Christ ◽

Religious Other ◽

Do So

AbstractIn Galatians 2:7–9, Paul lays out the parameters for the spread of the gospel for himself and his Judiean colleagues: all agreed that ?We should go to the gentiles and they to the circumcised? (Gal 2:9). This division of labor is crucial for understanding Paul: his task involves an intentional crossing of ethnic boundaries. Ethnicity determined the organization of the mission and Paul was responsible for the ethnic and religious "other."Here I explore Paul's construction of his identity as a Judean teacher of gentiles. Drawing on recent work in anthropology and critical race theory, I propose an approach which understands identity as flexible and multiplicative. Two principles operate within this dynamic model: 1) people shift identities according to specific circumstances and 2) people prioritize their various identities, ranking some higher than others.This model helps us understand Paul, who describes himself in a variety of ways: Judean by birth, born of the tribe of Benjamin, seed of Abraham, apostle to the gentiles, in Christ. These multiple identities as Paul shifts among them and sometimes ranks one over others serve his argument in strategic ways. He is willing, for example, to forego certain practices of the law (an important part of his Judean identity) in order to interact with gentiles (and he rebukes his colleagues for refusing to do so [Gal 2:11–14]). Yet other aspects of his identity are more important and also less flexible: his "in-Christness" (which he shares with gentiles) and his birth as a Judean (which he does not share with gentiles). In closing, I consider the implications this reading has for the identities of the members of his audience, who are simultaneously gentiles, in Christ, and adopted sons of God.

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Mapping Urban Functional Zones by Integrating Very High Spatial Resolution Remote Sensing Imagery and Points of Interest: A Case Study of Xiamen, China

Remote Sensing ◽

10.3390/rs10111737 ◽

2018 ◽

Vol 10 (11) ◽

pp. 1737 ◽

Cited By ~ 19

Author(s):

Jinchao Song ◽

Tao Lin ◽

Xinhu Li ◽

Alexander V. Prishchepov

Keyword(s):

Remote Sensing ◽

Land Use ◽

Spatial Resolution ◽

High Spatial Resolution ◽

Remote Sensing Images ◽

Remote Sensing Imagery ◽

Points Of Interest ◽

Very High Spatial Resolution ◽

Functional Zones ◽

Very High

Fine-scale, accurate intra-urban functional zones (urban land use) are important for applications that rely on exploring urban dynamic and complexity. However, current methods of mapping functional zones in built-up areas with high spatial resolution remote sensing images are incomplete due to a lack of social attributes. To address this issue, this paper explores a novel approach to mapping urban functional zones by integrating points of interest (POIs) with social properties and very high spatial resolution remote sensing imagery with natural attributes, and classifying urban function as residence zones, transportation zones, convenience shops, shopping centers, factory zones, companies, and public service zones. First, non-built and built-up areas were classified using high spatial resolution remote sensing images. Second, the built-up areas were segmented using an object-based approach by utilizing building rooftop characteristics (reflectance and shapes). At the same time, the functional POIs of the segments were identified to determine the functional attributes of the segmented polygon. Third, the functional values—the mean priority of the functions in a road-based parcel—were calculated by functional segments and segmental weight coefficients. This method was demonstrated on Xiamen Island, China with an overall accuracy of 78.47% and with a kappa coefficient of 74.52%. The proposed approach could be easily applied in other parts of the world where social data and high spatial resolution imagery are available and improve accuracy when automatically mapping urban functional zones using remote sensing imagery. It will also potentially provide large-scale land-use information.

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Long- and Short-Term Changes of the Structure of Macrophytes in Lake Piaseczno in Relation to Land Use in the Łęczna-Włodawa Lakeland (Poland)

Transylvanian Review of Systematical and Ecological Research ◽

10.2478/trser-2013-0022 ◽

2013 ◽

Vol 15 (2) ◽

pp. 101-110

Author(s):

Joana Sender ◽

Weronika Maślanko

Keyword(s):

Land Use ◽

Aquatic Plants ◽

Short Term ◽

Main Interest ◽

Central European ◽

Macrophyte Communities ◽

Long Term Changes ◽

Very High ◽

Macrophyte Structure

ABSTRACT The Łęczna-Włodawa Plain, known also as the Łęczna-Wlodawa Lakeland, lies within the territory of the largest subregion of the Polesie region, covering over 1,300 km2. The main interest of the Łęczna-Włodawa Lakeland is that it is the oldest in the Central European Lowlands group of about 68 lakes. Among such a large number of lakes there exist all trophic types. However, since the late 1950’s, enormous dynamics of change associated with the disappearance of oligo- and mesotrophic lakes and their transformation into eutrophic, even hypertrophic, lakes have been observed. One of the biocenotic elements of the lakes, which are indicators of these changes, is aquatic plants. The aim of this study was to determine the macrophyte structure of Piaseczno Lake and changes of land use in its surroundings. Piaseczno Lake still represents very high natural values. A reduction in the number of macrophyte communities, which occurred especially in 2008, was a consequence of the fast-growing recreation infrastructure. From 1976 until 2010 an area of recreation infrastructure in the studied area increased more than 3.5 times, and in the built-up area more than five times, as well as a doubling of the total length of the roads. Meanwhile the surface area of wetlands and peatbogs significantly decreased - more than 11 times. Long-term changes in the structure of the macrophyte communities show that the number of communities has varied in each year, probably as a consequence of changes in landuse. Analysis showed changes to the surfaces inhabited by macrophytes, which have decreased significantly over only four years, by more than 25%. However, the proportion of rush communities has increased.

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Change Detection Analysis Using Surveying and Geoinformatics Techniques

Nigerian Journal of Environmental Sciences and Technology - March 2018 ◽

10.36263/nijest.2018.01.0051 ◽

2018 ◽

Vol 2 (1) ◽

pp. 28-38

Author(s):

I. C. Onuigbo ◽

J. Y. Jwat

Keyword(s):

Land Use ◽

Land Cover ◽

Change Detection ◽

Research Work ◽

Temporal Data ◽

Landsat Images ◽

Detection Analysis ◽

Ground Truthing ◽

Landsat Satellite ◽

Geoinformatics Techniques

The study was on change detection using Surveying and Geoinformatics techniques. For effective research study, Landsat satellite images and Quickbird imagery of Minna were acquired for three periods, 2000, 2005 and 2012. The research work demonstrated the possibility of using Surveying and Geoinformatics in capturing spatial-temporal data. The result of the research work shows a rapid growth in built-up land between 2000 and 2005, while the periods between 2005 and 2012 witnessed a reduction in this class. It was also observed that change by 2020 may likely follow the trend in 2005 – 2012 all things being equal. Built up area may increase to 11026.456 hectares, which represent 11% change. The study has shown clearly the extent to which MSS imagery and Landsat images together with extensive ground- truthing can provide information necessary for land use and land cover mapping. Attempt was made to capture as accurate as possible four land use and land cover classes as they change through time.

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ANALISIS C-ORGANIK, NITROGEN DAN C/N TANAH PADA LAHAN AGROWISATA BEKEN JAYA DI KABUPATEN KUANTAN SINGINGI

Jurnal AGROSAINS dan TEKNOLOGI ◽

10.24853/jat.5.1.11-18 ◽

2020 ◽

Vol 5 (1) ◽

pp. 11

Author(s):

Trinop Sagiarti ◽

Deno Okalia ◽

Gusti Markina

Keyword(s):

Land Use ◽

Random Sampling ◽

Soil Analysis ◽

Chemical Properties ◽

Chemical Characteristic ◽

Soil Samples ◽

Organic N ◽

Total N ◽

Gas Drilling ◽

Very High

Soil fertility determined by land management . Land use in the farmers to Beken Jaya in Kuantan Singingi has been going on for seven years to technique fertilizing not recommended, so it is important to knew soil chemical characteristic are now being to sustainable agriculture.This research in the soil samples uses the method purposive random sampling in 15 points gas drilling land as deep as 20 cm.Parameter examined is pH , C-organic , N-total , N-available and ratio C / N. All the data compared to table criteria of the chemical properties the ground by LPT 1993. Based on the results of the soil analysis in Agrowisata Beken Jaya can be concluded features chemical pH 5,88 -6,41 ( criteria midle acid ) , C-organik 0.25 % - 1,18 % ( criteria very low until low ) , N-total 0,30 -1,16 % ( criteria moderate to very high ), and C/N 0,24-3,97 (criteria very low)

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