Population recovery and spatial dynamics of colony recruitment in a harvester ant: a case study in a park

2006 ◽  
Vol 9 (3) ◽  
pp. 247-254
Author(s):  
Takeshi YAMAGUCHI
Keyword(s):  
Spatial Dynamics ◽  
Population Recovery ◽  
Harvester Ant

scholarly journals Morphological Change of Dhaka City Over a Period of 55 Years: A Case Study of Two Wards

1970 ◽  
Vol 2 ◽  
pp. 30-38 ◽  
Author(s):  
Bayes Ahmed ◽  
Muhammad Rakibul Hasan Raj ◽  
KM Maniruzzaman
Keyword(s):  
Urban Form ◽  
Spatial Dynamics ◽  
Morphological Structure ◽  
General Interest ◽  
Morphologic Change ◽  
Dhaka City ◽  
Territorial Expansion ◽  
Physical Form ◽  
The Many

Dhaka City has undergone radical changes in its physical form, not only by territorial expansion, but also through internal physical transformations over the last decades. These have created entirely new kinds of fabric. With these changes, the elements of urban form have changed. Plots and open spaces have been transformed into building areas, open squares into car parks, low land and water bodies into reclaimed built-up lands etc. This research has its general interest in the morphologic change of Dhaka City. It focuses on the spatial dynamics of urban growth of Dhaka over the last 55 years from 1952-2007. In the research, the transformation of urban form has been examined through space syntax. The aim behind using this technique is to describe aspects of relationships between the morphological structure of man-made environments and social structures and events. To conduct this research, Wards 49 and 72 of Dhaka City Corporation were selected as the study areas, of which Ward 72 is an indigenous and Ward 49 is a planned type of settlement. Being a planned residential area, the syntactic measures from this morphological analysis are showing quite unchanged and high values in all phases for Ward 49 and the physical characteristics of Ward 72 (Old Dhaka) still represent the past. The syntactic values are found to be higher for Ward 72 and than Ward 49. Higher values indicate that the street network is highly connective among each other. Time affects differently the layout of cities and the architecture of buildings. Of the many human creations, street systems are among the most resistant to change. This has been emphasized in this study, thereby facilitating the comparison of urban layouts across space and time. The interpretation of history in the light of quantitative accounts, as demonstrated in this study, will be of value to urban planners and urban designers for the future planning of modern Dhaka City.DOI: http://dx.doi.org/10.3329/jbip.v2i0.9554  Journal of Bangladesh Institute of Planners Vol. 2, December 2009, pp. 30-38

scholarly journals THE DIGITAL RESTITUTION OF LOT 3317: USING UNDERWATER IMAGE BASED MODELLING TO GENERATE VALUE IN VIRTUAL HERITAGE EXPERIENCES

2019 ◽  
Vol XLII-2/W15 ◽  
pp. 1163-1170
Author(s):  
K. T. D. Tousant ◽  
S. Fai
Keyword(s):  
Cultural Values ◽  
Spatial Dynamics ◽  
Cultural Value ◽  
Proof Of Concept ◽  
Cultural Resource ◽  
Head Mounted Display ◽  
Virtual Heritage ◽  
Underwater Image ◽  
History Of

<p><strong>Abstract.</strong> The intent of this paper is to demonstrate the cultural value that Virtual Heritage experiences can generate. As a proof of concept, game resolution assets were optimized from high polygon image based models (IBMs) and rendered in real-time, within a Head Mounted Display (HMD). The case study of lot 3317 was chosen to facilitate heuristic explorations pertinent to the history of the St. Lawrence Seaway, Canada. This case study explores methods in creating and validating heritage values, while valourizing assets as a cultural resource for use in the future. While at the same time, challenging the current spatial dynamics by conceptually reducing the distance between the viewer and the flooded landscape. In addition to demonstrating the cultural values generated through the veneration of lot 3317, the paper aims to provide a model for optimizing and post processing meshes produced through Under-Water Image-Base Modelling.</p>

Impact-Resistant Flying Platform for Use in the Urban Construction Monitoring

2021 ◽  
pp. 520-551
Author(s):  
Konstantin Dergachov ◽  
Anatolii Kulik
Keyword(s):  
Spatial Dynamics ◽  
Construction Monitoring ◽  
Model Based Control ◽  
Video Cameras ◽  
Urban Construction ◽  
Flight Mode ◽  
Aerial Vehicle ◽  
Coaxial Rotors ◽  
Advanced Model

A case study drone that constitutes a shock-resistant aerial vehicle is discussed in the chapter. The aerial motor platform is placed in gimbal joints of the exclusive framework (shell). The platform is a helicopter type aerial vehicle powered with two coaxial rotors of contra rotation. Mathematical model of the platform spatial dynamics bases Lagrange's equations to bring reliable solutions so that advanced model-based control law design techniques can be used. Though the case study implies utilizing an automatic flight mode of the aerial vehicle, it can be piloted remotely on radio. The on-board video cameras and other sensors are used to bring about both navigational duties and surveillance missions such as building constructions monitoring.

Economics of a nest-box program for the conservation of an endangered species: a reappraisal

2001 ◽  
Vol 31 (11) ◽  
pp. 1992-2003 ◽  
Author(s):  
Daniel A Spring ◽  
Michael Bevers ◽  
John OS Kennedy ◽  
Dan Harley
Keyword(s):  
Net Present Value ◽  
Population Recovery ◽  
Optimal Management ◽  
Present Value ◽  
Eucalyptus Regnans ◽  
Nest Boxes ◽  
Mountain Ash ◽  
Local Abundance ◽  
Leadbeater's Possum

An optimization model is developed to identify timing and placement strategies for the installation of nest boxes and the harvesting of timber to meet joint timber–wildlife objectives. Optimal management regimes are determined on the basis of their impacts on the local abundance of a threatened species and net present value (NPV) and are identified for a range of NPV levels to identify production possibility frontiers for abundance and NPV. We apply the model to a case study focusing on an area of commercially productive mountain ash (Eucalyptus regnans F. Muell.) forest in the Central Highlands region of Victoria, Australia. The species to be conserved is Leadbeater's possum (Gymnobelideus leadbeateri McCoy), which is locally limited by a scarcity of nesting hollows. The modeling is exploratory but indicates that nest boxes may offer a promising population recovery tool if consideration is taken of their placement and areal extent through time.

scholarly journals Stochastic dispersal increases the rate of upstream spread: a case study with green crabs on the northwest Atlantic coast

2017 ◽  
Author(s):  
A. Gharouni ◽  
M.A. Barbeau ◽  
J. Chassé ◽  
L. Wang ◽  
J. Watmough
Keyword(s):  
Larval Dispersal ◽  
Large Scale ◽  
Atlantic Coast ◽  
Carcinus Maenas ◽  
Spatial Dynamics ◽  
Larval Period ◽  
Spread Rate ◽  
Larval Behavior ◽  
Yearly Variation

AbstractDispersal heterogeneity is an important process that can compensate for downstream advection, enabling aquatic organisms to persist or spread upstream. Our main focus was the effect of year-to-year variation in larval dispersal on invasion spread rate. We used the green crab, Carcinus maenas, as a case study. This species was first introduced over 200 years ago to the east coast of North America, and once established has maintained a relatively consistent spread rate against the dominant current. We used a stage-structured, integro-difference equation model that couples a demographic matrix for population growth and dispersal kernels for spread of individuals within a season. The kernel describing larval dispersal, the main dispersive stage, was mechanistically modeled to include both drift and settlement rate components. It was parameterized using a 3-dimensional hydrodynamic model of the Gulf of St Lawrence, which enabled us to incorporate larval behavior, namely vertical swimming. Dispersal heterogeneity was modeled at two temporal scales: within the larval period (months) and over the adult lifespan (years). The kernel models variation within the larval period. To model the variation among years, we allowed the kernel parameters to vary by year. Results indicated that when dispersal parameters vary with time, knowledge of the time-averaged dispersal process is insufficient for determining the upstream spread rate of the population. Rather upstream spread is possible over a number of years when incorporating the yearly variation, even when there are only a few “good years” featured by some upstream dispersal among many “bad years” featured by only downstream dispersal. Accounting for annual variations in dispersal in population models is important to enhance understanding of spatial dynamics and population spread rates. Our developed model also provides a good platform to link the modeling of larval behavior and demography to large-scale hydrodynamic models.

scholarly journals Space, Religious Diversity, and Negotiation Processes

2020 ◽  
Vol 8 (3) ◽  
pp. 251-261 ◽  
Author(s):  
Solange Lefebvre
Keyword(s):  
Spatial Dynamics ◽  
Legal Aspects ◽  
Quebec City ◽  
The Public ◽  
Zoning Regulations ◽  
The Social ◽  
Spatial Dimensions ◽  
Analytical Category ◽  
Analytical Frameworks

After a literature review of space, urbanity, and religion, this article identifies some descriptive categories and analytical frameworks to theorize problems faced by religious minorities, especially Muslims, in obtaining space for their cemeteries and places of worship. A second section focuses on debates and an analysis related to these themes in the province of Quebec (Canada), especially in the City of Montreal, showing that while spatial dimensions rarely constitute an analytical category, this aspect is nevertheless a continual source of tension. The article illustrates how dysfunctional administrative processes have dominated the public scene in recent years. A case study shows how a few actors are exploiting provincial regulations in order to oppose public decisions that seek to accommodate the needs of Muslims, using a process for approving amendments to zoning bylaws by way of referendum. After a brief examination of the case related to a Muslim cemetery in a village near Quebec City, to shed light on the recent debates surrounding regulations, the article analyzes the decision-making process resulting in a failure to modify zoning regulations in order to welcome new places of worship in a borough of Montreal. While analyzing administrative and legal aspects, the article also exposes the complexity of the social and spatial dynamics at stake. Our conclusion is that any successful public policy on diversity must employ multilayered strategies, particularly to support space regulations with foundational intercultural and interreligious initiatives. It also brings attention to the perverse effect of some local participatory procedures, whereby a few actors maneuver to mobilize citizens, in order to resist the religious pluralization of space.

scholarly journals People-Space Analytics: Case Study of Work Dynamics

2017 ◽  
Author(s):  
Amin Mojtahedi ◽  
◽  
So-Yeon Yoon ◽  
Tahereh A. Hosseini ◽  
Diego H. Diaz Martinez ◽  
...  
Keyword(s):  
Spatial Configuration ◽  
Spatial Dynamics ◽  
Interdisciplinary Approach ◽  
Patterns Of Communication ◽  
Tools And Techniques ◽  
American Pragmatist ◽  
Recurrent Patterns ◽  
Flow Of Information ◽  
National Architecture

To deliver an innovative design, architects often need to innovate in the ways they empathize with and understand the user. In his 1994 essay, the American Pragmatist philosopher Richard Rorty writes that “one should stop worrying about whether what one believes is well-grounded and start worrying about whether one has been imaginative enough to think up interesting alternatives to one’s present beliefs”1. This study, primarily, explores an interdisciplinary approach in which data collection, analysis, and interpretation are used as drivers of inspiration as well as tools of validation. A combination of tools and techniques labeled as people-space analytics was used to investigate the socio-spatial dynamics of work in the workplace of a national architecture firm. The results were later interpreted from a certain lens in the community of practice theory. A secondary goal of this research project is to study how workplace’s spatial configuration and key people and places are involved in organizational learning and knowledge practices. Therefore, a set of metrics and measures were used to interpret different employees’ recurrent patterns of communication and flow of information between people from different social networks in a spatial context."

Sign in / Sign up

Export Citation Format

Share Document