scholarly journals Introduction to Gravity Models of Migration & Trade

2019 ◽  
Author(s):  
Adam Crymble
Keyword(s):  
Gravity Models ◽  
Migration Patterns ◽  
Probable Distribution

This lesson introduces gravity models as a means for determining the probable distribution of entities across space in historical datasets. It does so through a case study of historical migration patterns.

scholarly journals Polish Migration’s Socio-Cultural Impact on Wales in the Aftermath of 2004 – Preliminary Findings from Western Wales: An Aberystwyth Case Study

2016 ◽  
Vol 1 (1) ◽  
pp. 91-112 ◽  
Author(s):  
Paweł Wróbel
Keyword(s):  
Eu Enlargement ◽  
Cultural Impact ◽  
Migration Patterns ◽  
Distinctive Features ◽  
Polish Migration ◽  
History Of ◽  
Mutual Relations ◽  
The Uk ◽  
Adaptation Processes

AbstractThis papers looks at the societal and cultural impact of the post-2004 Polish migration to Wales. The history of Polish migration to the UK is introduced together with the relevant statistics and their rationale behind choosing cosmopolitan Wales as their new country of residence. Even though the focus of the paper is rather on the UK as a whole, it is Wales that is central to the investigation. Wales was particularly neglected in the study of migration in the aftermath of the 2004 European Union (EU) enlargement and surprisingly little attention was given to it. Focusing on Polish diaspora is important as it is the most numerous external migration wave to Wales (ONS 2011). The case study of Aberystwyth is introduced as a good example of a semi-urban area to which Poles migrated after 2004. Moreover, the paper elaborates on the characteristics of the Polish newcomers by analysing their distinctive features, migration patterns as well as adaptation processes. Mutual relations between post-1945 and post-2004 immigration waves are investigated, together with Poles’ own image and perception. This paper gives a deeper understanding and provides an insight into the nature of the Polish migrants’ impact on the cultural and societal life of Wales.

Cosmolian: High-resolution Integrated OSL and CN modelling Program for Sand Transportation in Eolian Realms (HIPSTER)

2021 ◽  
Author(s):  
Shlomy Vainer ◽  
Yoav Ben Dor
Keyword(s):  
Landscape Evolution ◽  
Sand Dunes ◽  
Integrative Approach ◽  
Model Parameters ◽  
Arid Environments ◽  
Aeolian Transport ◽  
Migration Patterns ◽  
Aeolian Processes ◽  
Simpson Desert

<p>The extensivity of sand dunes in continental interiors makes the understating of their morphodynamical properties valuable for palaeoenvironmental reconstructions and the interpretation of landscape evolution. Nevertheless, the study of aeolian landscape development at the million-years timescale is hampered by the complex interaction of factors determining dune migration and the inherently self-destructive nature of their chronostratigraphy, thus limiting the applicability of traditional luminescence-based dating methods for configuring processes beyond ~300 Ka. In this study, we present a standalone program that simulates aeolian transport based on luminescence-derived chronologies coupled with numerical modelling of cosmogenic nuclides accumulation. This integrative approach reveals ancient phases of sand irruption and provides a data-based scheme facilitating the morphodynamical study of aeolian processes over multiple timescales. We present a case study of the program application by analyzing data from the Australian Simpson Desert, unfolding several phases of aeolian vitality since the late Pliocene. The synchronicity of the results with drastic changes in environmental settings exemplifies the applicability of process-based modelling in constructing a timeframe of key landscape evolution events in arid environments by studying aeolian landforms. Finally, the relationships between model parameters used to determine environmental settings on sand migration patterns make the program a powerful tool to further investigating triggers and mechanisms of aeolian processes.</p>

scholarly journals A Critical Analysis of the Drivers of Human Migration Patterns in the Presence of Climate Change: A New Conceptual Model

2020 ◽  
Vol 17 (17) ◽  
pp. 6036
Author(s):  
Rebecca Parrish ◽  
Tim Colbourn ◽  
Paolo Lauriola ◽  
Giovanni Leonardi ◽  
Shakoor Hajat ◽  
...  
Keyword(s):  
Climate Change ◽  
Conceptual Model ◽  
Human Migration ◽  
Migration Patterns ◽  
Migration Literature ◽  
Quantitative Studies ◽  
Time Space ◽  
Health Progress ◽  
And Migration

Both climate change and migration present key concerns for global health progress. Despite this, a transparent method for identifying and understanding the relationship between climate change, migration and other contextual factors remains a knowledge gap. Existing conceptual models are useful in understanding the complexities of climate migration, but provide varying degrees of applicability to quantitative studies, resulting in non-homogenous transferability of knowledge in this important area. This paper attempts to provide a critical review of climate migration literature, as well as presenting a new conceptual model for the identification of the drivers of migration in the context of climate change. It focuses on the interactions and the dynamics of drivers over time, space and society. Through systematic, pan-disciplinary and homogenous application of theory to different geographical contexts, we aim to improve understanding of the impacts of climate change on migration. A brief case study of Malawi is provided to demonstrate how this global conceptual model can be applied into local contextual scenarios. In doing so, we hope to provide insights that help in the more homogenous applications of conceptual frameworks for this area and more generally.

Effects of predation on telemetry-based survival estimates: insights from a study on endangered Atlantic salmon smolts

2015 ◽  
Vol 72 (5) ◽  
pp. 728-741 ◽  
Author(s):  
A. Jamie F. Gibson ◽  
Edmund A. Halfyard ◽  
Rod G. Bradford ◽  
Michael J.W. Stokesbury ◽  
Anna M. Redden
Keyword(s):  
Atlantic Salmon ◽  
Striped Bass ◽  
Survival Rates ◽  
Morone Saxatilis ◽  
Population Level ◽  
Fish Predation ◽  
Bay Of Fundy ◽  
Migration Patterns ◽  
Predation Effects

Telemetry is increasingly being used to estimate population-level survival rates. However, these estimates may be affected by the detectability of telemetry tags and are reliant on the assumption that telemetry data represent the movements of the tagged fish. Predation on tagged fish has the potential to bias survival estimates, and unlike the issue of detectability, methods to correct for the resulting bias (termed “predation bias”) are not yet developed. In an acoustic telemetry study on inner Bay of Fundy Atlantic salmon (Salmo salar) smolts during 2008 and 2011, unusual tag detection patterns were indicative that some data may have been representative of the movements of predators rather than smolts. To incorporate predation effects into the resulting survival estimates, a suite of 11 summary migration metrics were compared between Atlantic salmon smolts and striped bass (Morone saxatilis). Cluster analyses revealed that 2.4% to 13.6% of tags implanted in smolts exhibited migration patterns more similar to striped bass than to other smolts, which was interpreted here as evidence of predation. Reassigning the fate of these tags as “depredated–died” reduced estimated survival from 43.5% to 41.1% in 2008 and from 32.6% to 19.0% in 2011 relative to a traditional mark–recapture model, illustrating the effect of predation bias in this case study.

Intra-Urban Migration Patterns in the Perspective of Improved Radiation Model - A Case Study of Beijing

2013 ◽  
Vol 869-870 ◽  
pp. 110-116 ◽  
Author(s):  
Yu Shi ◽  
Xin Qi Zheng ◽  
Yi Bo Sun ◽  
Zong Ren Jia
Keyword(s):  
Gravity Model ◽  
Internal Migration ◽  
Urban Areas ◽  
Population Migration ◽  
Model Parameters ◽  
Urban Migration ◽  
Economic Data ◽  
Radiation Model ◽  
Migration Patterns

Gravity Model is commonly used in the study of urban internal migration . Filippo Simini etl improve the Gravity Model, thereby create a more realistic radiation model. Radiation model is validated in the U.S., however, isnt sure to be fit in China. According to the actual situations of our country, the study processes Radiation model parameters and simulates internal migration in Beijing based on the socio-economic data (2005-2010). Results show that the Fengtai District and the Tongzhou District are the two largest migration district in the five years. While the Daxing Districts migration increases year by year. Furthermore, by the contrast of population migration radiation line and GDP, this paper points out that the economics is the main driving force of urban internal migration. Finally, from the perspective of new urban areas construction, development of urban functions expansion areas and population migration balance in Beijing, the corresponding suggestions are put forward for urban planning in Beijing.

scholarly journals LIFE STRATEGIES OF MONOTOWN RESIDENTS: ATTRACTIVENESS OF RESIDENCE AND MIGRATION ATTITUDES

2018 ◽  
Vol 2018 (1) ◽  
pp. 34-41
Author(s):  
Н. Мосиенко ◽  
N. Mosienko ◽  
А. Черепанова ◽  
A. Cherepanova
Keyword(s):  
Urban Environment ◽  
Well Being ◽  
Life Strategies ◽  
Migration Patterns ◽  
Depth Interview ◽  
And Migration ◽  
The One ◽  
The City

<p>Residents of monotowns face a specific range of problems affecting their social well-being. The purpose of the study was to identify and describe the types of life strategies of monotown residents with a focus on the place of residence and the location of the attractiveness of the urban environment and migration attitudes in them. The study employed a case-study strategy of an in-depth interview with residents of Sayansk, a monotown that displays risks of socio-economic deterioration. To describe the context, the authors used statistical data on the population and migration of the Sayansk population, as well as historical chronicle of the town. Based on two indications (perception of the quality of the urban environment and the migration attitudes), the authors have constructed a typology of life strategies and described the related characteristics of inhabitants. The study shows that the life strategies of the inhabitants reveal, on the one hand, a spectrum of migration patterns (depending on the characteristics of the inhabitants), and, on the other hand, various degrees of satisfaction with the quality of the urban environment, which makes the city attractive or unattractive in the eyes of the population.</p>

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