Experimental Study on Particle Clogging of Biofilter Device in Urban Areas

2011 ◽  
Vol 2011 (12) ◽  
pp. 4283-4293
Author(s):  
Redahegn Silesh ◽  
Robert Pitt ◽  
Shirley Clark
Keyword(s):  
Experimental Study ◽  
Urban Areas

EXPERIMENTAL STUDY ON USE OF FALL PREVENTION MEMBERS IN WALL AND COLUMN DEMOLITION

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Seiji Takanashi ◽  
Hiroki Takahashi ◽  
Tomohito Hori
Keyword(s):  
Experimental Study ◽  
Fall Prevention ◽  
Urban Areas ◽  
Steel Pipe ◽  
Small Scale ◽  
Bottom Part ◽  
Steel Pipes ◽  
Wire Ropes ◽  
Heavy Machinery ◽  
Measured Load

At demolition sites in Japan, columns and walls are pulled down and demolished by heavy machinery or wire ropes. In a small-scale building in urban areas, columns and walls are pulled down by wire ropes. Before pulling down, workers damage the bottom part of the columns and walls for weakening them. However, if the damage of the columns and walls are too much, they fall down before use of wire ropes. As a result, they may crush workers. In this study, a fall prevention material was proposed with its installation method and verified its effectiveness by experiments. In an experiment of this study, steel pipes for supporting 3m-column were examined. The steel pipes were installed diagonally to the column. The column was loaded horizontally. We measured load and deformation until the steel pipe failed. As a result of experiments, it was found that the steel pipe buckled or the bolt supporting the steel pipe damaged. We concluded that this method is effective because the steel pipes were found to be sufficiently strong against the load generated in the steel pipes when the columns fell.

scholarly journals Experimental study of the older preschool children’s vocabulary development while acquainting with professions

2021 ◽  
pp. 1799-1812
Author(s):  
Olena Hnizdilova ◽  
Yulia Lukashova ◽  
Svetlana Bursova ◽  
Nataliia Yudina ◽  
Olha Hryshko
Keyword(s):  
Experimental Study ◽  
Preschool Children ◽  
Pilot Study ◽  
Urban Areas ◽  
Vocabulary Development ◽  
Professional Activity ◽  
Structural Components ◽  
Place Of Residence ◽  
Professional Activities

The paper mainly highlights the features of older preschool children’s acquaintance with the professional activities of adults. The theoretical and methodical bases of the researched issue are generalized. The structural components of the formation of preschoolers’ ideas about professions are highlighted. The results of a pilot study to determine the level of older preschool children’s acquaintance with the occupations of adults are presented. The influence of the place of residence on the depth of children’s knowledge about the professional activity is found out. It is revealed that older preschool children understand the meaning of words that characterize the adults’ professional activities but rarely use them in their active speech. Based on the results obtained, it is concluded that children from urban areas are more familiar with the emerging professions but ignores agricultural and working professions.

scholarly journals Gratitude and Resilience among Adolescents Who Have Experienced Parental Divorce

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Khairunnisa Shabrina ◽  
Chandradewi Kusristanti ◽  
Ratih Arruum Listiyandini
Keyword(s):  
Experimental Study ◽  
Linear Regression ◽  
Urban Areas ◽  
Parental Divorce ◽  
Simple Linear Regression ◽  
Resilience Scale ◽  
Divorce Rates ◽  
Difficult Times ◽  
Gratitude Interventions

Compared to other cities in Indonesia, DKI Jakarta, as one of the largest urban areas, is ranked quite high in divorce rates. It is known that parental divorce has several impacts on children. For example, adolescents with divorced parents have a greater risk of various psychological problems. Previous studies have shown that gratitude enhances positivity and optimism, and it also helps individuals through difficult times, including parental divorce. This non-experimental study aims to determine the role of gratitude in resilience among adolescents (12 – 21 years old) based in the Jakarta metropolitan area (Jabodetabek), whose parents are divorced. Non-probability sampling was used to recruit the participants (n = 109). The measurements used in this study are the Connor-Davidson Resilience Scale (α = 0.896) and Gratitude Scale Indonesian Version (Skala Bersyukur Versi Indonesia (SBI)) (α = 0.896). Simple linear regression showed that gratitude plays a significant role in a participant’s resilience (p < 0.05). Further, 28.9% of the variance in resilience can be explained by gratitude. These findings highlight the importance of gratitude interventions to enhance resilience among adolescents with divorced parents.

scholarly journals Experimental study of the transient motion of floats reproducing floating wood in rivers

2018 ◽  
Vol 40 ◽  
pp. 02041
Author(s):  
Hossein Ghaffarian Roohparvar ◽  
Diego Lopez ◽  
Nicolas Riviere ◽  
Herve Piegay ◽  
Emmanuel Mignot
Keyword(s):  
Experimental Study ◽  
Body Length ◽  
Urban Areas ◽  
Hydraulic Structures ◽  
Large Wood ◽  
Transient Motion ◽  
Particle Characteristic ◽  
Floating Particles ◽  
Response Distance ◽  
Key Parameter

The flow of large wood among hydraulic structures in rivers, especially in urban areas, can cause many problems. Despite many statistical, morphological and hydrodynamical studies on this phenomenon, little information is available on the transient motion of floating wood pieces. In this study, we investigate theoretically and experimentally the transient motion of floating particles under a simple acceleration. From a standard advection model we identify a particle characteristic response distance to the flow, noted λ. This key parameter is then measured for different floating particles reproducing wood in rivers (logs without and with idealized roots). We show here the typical value of this parameter as a function of particle streamwise body length for different particle geometries. The influence of roots can be well captured by an equivalent frontal area, regardless of the root pattern. This response distance could provide useful information on the probability of impact on hydraulic structures depending on the floating wood characteristics.

scholarly journals PRE-PROCESSES FOR URBAN AREAS DETECTION IN SAR IMAGES

2017 ◽  
Vol XLII-4/W6 ◽  
pp. 15-17
Author(s):  
S. Altay Açar ◽  
Ş. Bayır
Keyword(s):  
Experimental Study ◽  
Synthetic Aperture Radar ◽  
Urban Areas ◽  
Binary Image ◽  
Synthetic Aperture ◽  
Image Smoothing ◽  
Sar Images ◽  
Aperture Radar

In this study, pre-processes for urban areas detection in synthetic aperture radar (SAR) images are examined. These pre-processes are image smoothing, thresholding and white coloured regions determination. Image smoothing is carried out to remove noises then thresholding is applied to obtain binary image. Finally, candidate urban areas are detected by using white coloured regions determination. All pre-processes are applied by utilizing the developed software. Two different SAR images which are acquired by TerraSAR-X are used in experimental study. Obtained results are shown visually.

scholarly journals ÁREAS VERDES URBANAS IMAGEM E USO - O CASO DO PASSEIO PÚBLICO DE CURITIBA-PR

2004 ◽  
Vol 8 ◽  
Author(s):  
Silmara Dias FEIBER
Keyword(s):  
Experimental Study ◽  
Environmental Impacts ◽  
Natural Environment ◽  
Urban Areas ◽  
Public Parks ◽  
Green Areas ◽  
Ordinary Citizens

Com a finalidade de avaliar a importância das áreas verdes urbanas como agentes amenizadores dos impactos ambientais causados pela intensa intervenção do homem sobre o meio ambiente natural, a presente pesquisa tem por objetivo verificar este poder de amenização e usa como foco de análise os Parques Públicos Urbanos. Procura-se para tanto buscar bases teóricas que dêem subsídio à pesquisa no sentido de avaliar como os cidadãos comuns através das práticas cotidianas percebem as áreas verdes, usam e traçam suas trajetórias que darão base ao desenvolvimento de uma imagem particular. Para dar sustentação à pesquisa, realizouse um estudo empírico no Passeio Público de Curitiba-PR, onde se pôde alcançar os objetivos propostos. Green urban areas image and use - the case of Passeio Público from Curitiba-PR Abstract In order to evaluate the importance of the green urban areas aiming at the reduction of the environmental impacts caused by man intense intervention over the natural environment, this paper checks this reduction power by analysing urban public parks. To achieve that goal, it brings theoretical bases that will subsidize the research in order to evaluate how the ordinary citizens, through daily practices, by noticing green areas, use and make their tracking, which will give means to develop a particular image. To support the research, an experimental study on Curitiba-PR public walk was held.

Effect of wall heating on street canyon ventilation

2020 ◽  
Author(s):  
Pietro Salizzoni ◽  
Sofia Fellini ◽  
Luca Ridolfi
Keyword(s):  
Experimental Study ◽  
Cross Section ◽  
Urban Areas ◽  
Street Canyon ◽  
Particle Image ◽  
Two Dimensional ◽  
Turbulent Fluctuations ◽  
Image Velocimetry ◽  
Microclimatic Conditions ◽  
Turbulent Velocity Field

&lt;p&gt;Understanding the dynamics of mass and heat exchange between a street canyon and the overlying atmosphere is crucial to predict air quality and microclimatic conditions within dense urban areas. Previous studies have demonstrated that the bulk transfer between the street and the overlying flow is entirely governed by the intensity of turbulent fluctuations within the street. The aim of this experimental study is to evaluate how the geometry of the street canyon and the solar radiation on building fa&amp;#231;ades influence the turbulent velocity field within a two-dimensional street canyon and thus the global street canyon ventilation. The study was carried in a wind tunnel. The boundary conditions inside the canyon were modified by heating its windward and leeward walls and by changing the cavity aspect-ratio. The flow field in a cross-section of the street canyon was measured with particle image velocimetry. Temperatures were measured by means of thermocouples. The velocity and vorticity fields are analysed and discussed.&lt;/p&gt;

An Experimental Investigation of Expansive Soil Treated with Glass powder and Granite Dust

2021 ◽  
Vol 9 (VI) ◽  
pp. 3167-3172
Author(s):  
Mayank Soni
Keyword(s):  
Experimental Study ◽  
Experimental Work ◽  
Urban Areas ◽  
Glass Powder ◽  
Expansive Soil ◽  
Dry Weight ◽  
Natural State ◽  
Clay Sample ◽  
Long Distance ◽  
Optimum Quantity

In urban areas, borrow earth is not easily available which has to be hauled from a long distance. Quite often, large areas are covered with highly plastic and expansive soil, which is not suitable for such purpose. This study involves the collection of clay sample and evaluation of its properties in natural state and after stabilization with Granite dust and Glass powder. In the first set of experimental work the BC soil is mixed with Glass powder in different proportion i.e. 2%,4%,6%,8% and 10% and the optimum quantity of Glass powder is determined. The optimum quantity of Glass powder is found as 8% of the dry weight of clay. In the second set of experimental work the BC soil is stabilized by Glass powder and Granite dust in combination. Granite dust used 10-20 % of the dry weight of clay with Glass powder additives. From the experimental study it can be concluded that the stabilization of BC soil with Granite dust and Glass powder is more effective as compared to the stabilization with Glass powder only.

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