scholarly journals A Study of Branch Dynamics on an Open-Grown Tree

2014 ◽  
Vol 40 (3) ◽  
Author(s):  
Kenneth James
Keyword(s):  
Urban Areas ◽  
Dynamic Properties ◽  
Wind Damage ◽  
Open Spaces ◽  
Acer Saccharinum ◽  
Silver Maple ◽  
Tree Sway ◽  
Whole Tree

This study investigates the dynamic properties of branches on an open-grown tree, where most of the mass is in the branches rather than in the trunk. When large branches on open-grown trees sway in winds, they individually and collectively influence how the whole tree sways. If branches are removed, as in pruning, the effect on tree sway has not yet been studied and the literature is almost nonexistent regarding recommendations for pruning open-grown trees to reduce wind damage. Trees come in many shapes and sizes and in urban areas, usually grow in open spaces and develop many branches. In forests, and particularly in closely spaced plantations, trees grow with an upright central trunk and develop significantly less branch mass. Forest conifers have been studied to identify their dynamic properties in winds, but the results may be different for open-grown trees. A 19.7 m tall silver maple (Acer saccharinum) with four codominant branches was tested by pulling and then releasing each branch to determine the dynamic properties. Branches were progressively removed and the tests repeated. The sway response was recorded with strain instruments attached to the trunk and accelerometers attached to each branch. The dynamic properties of frequency and damping were determined for all tests. The tree with all branches attached, in full foliage was difficult to sway because of damping from the branches. Significant changes in oscillating frequency and damping were observed only after most of the branches (greater than 80%) were removed. The results support the concept that branches provide damping, which dissipates energy from the wind as a mechanism to help trees survive.

Design of a cable-stayed footbridge adaptable to various urban areas

2019 ◽  
Author(s):  
Franco Clerici ◽  
Silvia Mirabella
Keyword(s):  
Public Transportation ◽  
Urban Areas ◽  
Local Governments ◽  
Open Spaces ◽  
Limited Space ◽  
Reduced Mobility

<p>The present paper relates to the design of a cable-stayed footbridge, composed by ready made elements and with span suitable to various urban and building areas. At present, in order to find a solution to traffic problems, local governments look for many ways to alleviate city’s main roads, increasing public transportation and designing dedicated underground pedestrian routes. Although this subways already built are not really used by pedestrians, which prefer wide-open spaces, such as skyways also designed for people with reduced mobility. In this context the described footbridge, with access ramps designed in accordance with accessibility standards, represents not only a good solution for cycle and pedestrian mobility problems, but it is also easy to transport and to be installed, due to its modular elements. The access ramps are suspended to pilons with inclination depending by the required bridge lengths and they can be assembled in different configurations in order to be well integrated also in limited space areas. Finally a particular focus is dedicated to cables, with dismountable end terminations designed to reduce transportation space and costs</p>

scholarly journals BUILT ENVIRONMENT: MODELLING THE URBAN SPACE

2019 ◽  
Vol XLII-2/W11 ◽  
pp. 595-600 ◽  
Author(s):  
F. Guzzetti ◽  
K. L. N. Anyabolu ◽  
L. D’Ambrosio ◽  
G. Marchetti
Keyword(s):  
Urban Space ◽  
Urban Areas ◽  
Open Space ◽  
Facility Management ◽  
Complex Environment ◽  
Open Spaces ◽  
Urban Open Space ◽  
Historical Significance ◽  
Green Areas ◽  
Environment Modelling

<p><strong>Abstract.</strong> In urban areas, the “built” is defined by many different elements. Not only buildings but also open spaces containing green areas, viability, urban furniture, underground facilities. While the H-BIM sector focuses, rightly, on buildings of great historical significance, in our case it is been consider a part of the built that it usually not analyse: the urban open space. One of the interesting themes is the possibility of having a single tool that integrates the different objects present in a complex environment such as the urban area. The process with BIM model could allow a huge saving in terms of time and costs considering public tender, maintenance or construction phase of a project. Facility management operating through BIM is another relevant theme considering the whole life of a construction. Finally, another important theme is the connections between elements above the ground (visible elements) and subsoil (not visible elements), not only for the administrations but also if related to the HBIM environment.</p><p>The paper reports the analysis of the experience performed, particularly related to questions about detail and accuracy of the BIM model.</p><p>A methodology for modelling open spaces is been assuming, it is described possible improvements and considerations on the result.</p>

Understanding the Role of Urban Morphology and Green Areas Configuration During Heat Waves

2020 ◽  
pp. 502-517
Author(s):  
Marialuce Stanganelli ◽  
Carlo Gerundo
Keyword(s):  
Urban Areas ◽  
Heat Waves ◽  
Statistical Correlation ◽  
Urban Morphology ◽  
Urban Environments ◽  
Open Spaces ◽  
Green Areas ◽  
Planning Strategies

This paper focuses on urban planning strategies to adapt cities to the increasing rising of temperatures during summer heat waves. The main target is to investigate which configuration and distribution pattern of green spaces could effectively improve natural cooling of urban environments. Although the benefit that green areas give to natural cooling is well known, this kind of studies has hardly been carried out, especially at an urban scale where it is crucial to define quantities and density of green areas to address open spaces design. To reach this goal, a methodology based on the interpretation of the statistical correlation among temperature, urban parameters and green areas configurational indicators was implemented and applied to the case study of the Municipality of Naples, performing all the analysis in a GIS. Results provide guidelines to improve natural cooling in urban areas adopting the most effective configuration and distribution of green areas within a densely-built context.

Evolution of Landscape Architecture

2018 ◽  
Vol 931 ◽  
pp. 856-861 ◽  
Author(s):  
Alexandra M. Vorobyeva
Keyword(s):  
State Policy ◽  
Urban Areas ◽  
Landscape Architecture ◽  
Historical Period ◽  
Present Stage ◽  
Open Spaces ◽  
Historical Process ◽  
Special Direction ◽  
Architecture Development

The article considers the historical process of landscape architecture development as a special direction of architectural activity, engaged in creating the open spaces environment of the urban areas. The methods and principles of landscape objects creating throughout the considered historical period, including the present stage, are investigated. The connection between architecture and landscape architecture in urban open spaces construction, as well as the influence of state policy on the formation of a school of landscape architects are showed.

scholarly journals Exploring urban agriculture as a component of multifunctional green infrastructure: Application of figure-ground plans as a spatial analysis tool

2017 ◽  
Vol 25 (3) ◽  
pp. 208-218 ◽  
Author(s):  
Attila Tóth ◽  
Axel Timpe
Keyword(s):  
Land Use ◽  
Spatial Analysis ◽  
Urban Agriculture ◽  
Green Infrastructure ◽  
Urban Areas ◽  
Arable Land ◽  
Fruit Trees ◽  
Analysis Tool ◽  
Open Spaces ◽  
Metropolitan Regions

Abstract Using ‘Urban Atlas’ as a data source, the authors present and critically discuss in this paper the application of figure-ground plans in combination with complex land-use maps as a tool for spatial analysis of urban agriculture in European cities and their multifunctional green infrastructure. The selected cities and metropolitan areas (including Dublin, Ruhr Metropolis, Geneva and Sofia) represent different regions in Europe from the Northwest to the Southeast. Urban fabric, agriculture and non-agricultural open spaces have been analysed and compared as the main land-use components. Agricultural open spaces include arable land with annual crops and permanent crops, such as vineyards, fruit trees and olive groves; pastures; as well as complex and mixed cultivation patterns. The results reveal the scale and land-use diversity of metropolitan regions and different spatial patterns of urban agriculture at the regional level and in central urban areas.

scholarly journals Environmental Risk Perception and Preventive Behavior during the COVID-19 Pandemic in Central Taiwan

2021 ◽  
Vol 18 (18) ◽  
pp. 9920
Author(s):  
Kuo-Wei Hsu ◽  
Jen-Chih Chao ◽  
Ching-Yi Hsu
Keyword(s):  
Risk Perception ◽  
Environmental Risk ◽  
Urban Areas ◽  
Participant Observation ◽  
The Elderly ◽  
Open Spaces ◽  
Aged People ◽  
Environmental Risk Perception ◽  
Central Taiwan ◽  
Novel Coronavirus

Due to traffic and industrial and seasonal air pollution, wearing masks outside the home has long been a daily habit for many people in Taiwan. After the emergence of the novel coronavirus (COVID-19), which has an incubation period of up to 14 days, wearing masks and maintaining social distancing was advised to reduce exposure to this new environmental risk. This study investigates open and semi-open spaces in three districts in central Taiwan, using a non-participant observation method, with the aim of understanding people’s mask-wearing behavior. The results indicate that mask-wearing rates were higher in urban areas than in rural ones and among females than males. By age cohort, mask-wearing was most prevalent among young adults and middle-aged people and least prevalent among minors, with the elderly occupying a middle position. Masks were also more likely to be worn in semi-open spaces than in open ones. This study enriches our understanding of environmental risk perception of the pandemic and of public perceptions, which are vital to increasing the adoption of preventative measures.

scholarly journals Pola Aktivitas Ibu Rumah Tangga Terhadap Pemanfaatan Ruang Terbuka di Rumah Susun

2011 ◽  
Vol 2 (2) ◽  
pp. 1372
Author(s):  
Yosica Mariana
Keyword(s):  
Urban Areas ◽  
Open Space ◽  
Activity Patterns ◽  
Descriptive Analysis ◽  
Analysis Method ◽  
Literature Study ◽  
Open Spaces ◽  
Three Stages ◽  
Remote Sensing Interpretation

In flat environments, housewives are most found staying throughout the day. They use existing open spaces in housing project to interact with other residents. To find out, discover and analyze the correlation between the pattern of open space utilization and the pattern of activity of housewives at flats, this research was conducted using descriptive analysis method bases on case studies on some flats in urban areas, namely Kebon Kacang Flat (KK), Kemayoran Flat (K), Taman Surya Flat (TS) and Pasar Jumat Flat (PJ). Subjects were housewives (residents of the flats); sampling is taken by stratified random sampling. The survey was conducted by interview to obtain data on activity patterns of the mother. Subsequently, observation was conducted to get an overview of the activity patterns of mothers and use of open space including non-physical and physical data of these open spaces. The implementation was done in three stages: preparation (literature study and data collection by remote sensing), interpretation, field test and re-interpretation (width, location, quality of open spaces and activities, professions of women at these locations), and result presentation. 

scholarly journals RESEARCH TO PRODUCTION: LABORATORY SCALE-UP WITH MICROPROPAGATED ACER SACCHARINUM L.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1108e-1108
Author(s):  
John E. Preece ◽  
Carl A. Huetteman ◽  
W. C. Ashby ◽  
Paul L. Roth
Keyword(s):  
Scale Up ◽  
Shoot Proliferation ◽  
Root Initiation ◽  
Apparent Mass ◽  
Acer Saccharinum ◽  
Silver Maple ◽  
The Mean ◽  
Overall Efficiency ◽  
Outdoor Nursery

During the research phase, a system was developed to clonally micropropagate silver maple. Explant performance was best on DKW medium with 10 nM thidiazuron, and explants commonly developed 1 7 shoots after three months and over 60 shoots that could be rooted after four months in vitro. Plants were rooted (>90%) and acclimatized under intermittent mist and transplanted to an outdoor nursery bed. However, results were different during the production phase when 90 clones were propagated. Shoot proliferation rates were lower, differences in clonal response and worker efficiency were apparent, mass rooting under mist was inconsistent and acclimatization problems arose. The mean rooting was 46% under mist because of uneven coverage. Only 56% of rooted plantlets acclimatized which resulted in an overall efficiency of 26%. Partial solutions included root initiation in vitro, and use of fog for acclimatization.

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