scholarly journals A study of the factors affecting construction time in Western Australia

2012 ◽  
Vol 7 (40) ◽  
pp. 3390-3398 ◽  
Author(s):  
Wong Kenny ◽  
Vimonsatit Vanissorn
Keyword(s):  
Western Australia ◽  
Construction Time ◽  
Factors Affecting

Seed production and persistence of Carnamah and other early strains of Trifolium subterraneum in the wheatbelt of Western Australia

1967 ◽  
Vol 7 (24) ◽  
pp. 25 ◽  
Author(s):  
GB Taylor ◽  
RC Rossiter
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Western Australia ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Growing Season ◽  
Early Flowering ◽  
The Other ◽  
Factors Affecting ◽  
Seed Yields

Seed production and persistence of the Carnamah, Northam A, Dwalganup, and Geraldton strains of subterranean clover (Trifolium subterraneum L.) were examined in undefoliated swards in the wheatbelt of Western Australia. The early flowering characteristic of Carnamah was not always associated with higher seed yields. Only when there was a well-defined, early finish to the growing season, or when flowering was very much earlier in Carnamah (viz., following an early 'break' to the season), did this strain clearly outyield both Northam A and Geraldton. The seed yield of Dwalganup was generally inferior to that of the other strains. Factors affecting regeneration are discussed. Under low rainfall conditions, poorer germination-regulation of Carnamah, compared with Geraldton and Northam A, would be expected to result in poorer persistence unless offset by higher seed yields in the Carnamah strain.

The ecology of Sminthurus viridis (L.) (Collembola). I. Processes influencing numbers in pastures in Western Australia

1967 ◽  
Vol 15 (6) ◽  
pp. 1173 ◽  
Author(s):  
MMH Wallace
Keyword(s):  
Western Australia ◽  
Dominant Role ◽  
Clay Content ◽  
Early Death ◽  
Factors Affecting ◽  
Dead Bodies ◽  
Fat Bodies ◽  
Set Up ◽  
Content Support ◽  
Type 3

The changes in numbers of Sminthurus viridis (Collembola: Sminthuridae) in pastures in Western Australia were studied for 9 years on one site and for shorter periods on other sites. Five factors affecting numbers are described: (1) weather, (2) soil type (3) botanical composition of the pasture, (4) predation by Bdellodes lapidaria (Acarina: Bdellidae), and (5) eating of dead bodies by newly hatched nymphs. Weather is generally favourable for the active stages during autumn, winter, and spring. In the summer, the species is maintained by aestivating eggs. Dry periods during the winter months sometimes cause high mortalities. Soils containing a high silt-plus-clay content support higher numbers due mainly to increased oviposition. Flea densities increase more rapidly where there is a high proportion of broad-leaved plants, such as clover and capeweed in the pasture. Grassy areas are not favoured. Predation by B. lapidaria effectively reduces numbers. The presence of more than 20 B. lapidaria per square metre early in the winter prevents any outbreak of fleas later in the season. Bdellodes lapidaria numbers increase in response to an increase in flea numbers. An irregular predator-prey cycle is set up in this way. Density-induced mortality, resulting from the newly hatched nymphs eating the bodies of recently dead fleas, plays a dominant role at high densities. This process operates continuously though at decreased intensity at lower densities. When newly hatched nymphs feed upon dead nymphs and adults they ingest materials which cause early death. Sometimes this may lead to a dramatic collapse of the population. Fleas from high-density populations usually contain large quantities of uric acid in their "fat-bodies". It is suggested that death of the mature fleas at high densities is hastened through the storage of excessive amounts of waste material. Death of the young nymphs feeding upon the dead bodies may be brought about by the ingestion of these waste materials, although this has yet to be proven.

Factors Affecting the Distribution of Nutrients in the Tree Organs of Eucalyptus camaldulensis in the Arid Lands of Western Australia

2011 ◽  
Vol 44 (9) ◽  
pp. 653-661 ◽  
Author(s):  
Hiroyuki Hamano ◽  
Noriko Saito ◽  
Yoshiko Tanaka ◽  
Shigeru Kato ◽  
Kiyotaka Tahara ◽  
...  
Keyword(s):  
Western Australia ◽  
Eucalyptus Camaldulensis ◽  
Arid Lands ◽  
Factors Affecting

Factors affecting nestling condition and timing of egg-laying in the endangered Carnaby’s cockatoo, Calyptorhynchus latirostris

2020 ◽  
Vol 26 (1) ◽  
pp. 22
Author(s):  
Denis A. Saunders ◽  
Rick Dawson ◽  
Peter R. Mawson ◽  
A. O. Nicholls
Keyword(s):  
Body Mass ◽  
Western Australia ◽  
Egg Laying ◽  
Breeding Habitat ◽  
Left Wing ◽  
Factors Affecting ◽  
Failure Data ◽  
Breeding Populations ◽  
Nestling Condition ◽  
Breeding Failure

Carnaby’s cockatoo, Calyptorhynchus latirostris, is endemic to south-western Australia. It has undergone a major decline in range and abundance as a result of extensive removal of breeding and foraging habitat. It is now classified as endangered by the State of Western Australia, the Australian government, and internationally. In order to plan effective conservation management for the species it is important to assess the success of breeding populations throughout its range. In this paper we examine the efficacy of using the relationship between growth in the length of a nestling’s folded left wing and body mass to assess nestling condition, and examine known breeding failure in relation to nestling condition in two breeding populations: one at Coomallo Creek (studied from 1970–2017), and the other at Manmanning (1969–76). Results demonstrated that the lighter the nestlings, the higher the rate of breeding failure. Data from the Coomallo Creek population were used to prepare a table of nestling folded left wing length and body mass as a benchmark for assessing nestling condition in 10 other breeding populations, based on data collected from 1970 to the present. Following extensive clearing that removed foraging and breeding habitat, two of the 10 populations produced nestlings that were significantly lighter than the benchmark, and both populations subsequently declined to extinction. The commencement of egg-laying each season at Coomallo Creek was strongly influenced by total rainfall in the first half of autumn. The length of the egg-laying period between 1970–76 and 2009–17 increased by 5.2 weeks (40%). This increase was related to changes in rainfall and temperature over more than four decades. Despite the lengthening of the egg-laying period, nestling condition was unaffected, suggesting that, at least in the short term, the Carnaby’s cockatoo population at Coomallo Creek is coping with the effects of climate change.

Mitigating Resource Management Related Factors Affecting Time and Cost Performance in Construction Projects

2021 ◽  
Vol 4 (2) ◽  
pp. 62-66
Author(s):  
Abdul Qadir Memon ◽  
Aftab Hameed Memon ◽  
Mohsin Ali Soomro
Keyword(s):  
Construction Projects ◽  
Poor Performance ◽  
Mitigation Measures ◽  
Construction Time ◽  
Related Factors ◽  
Cost Performance ◽  
Effective Measure ◽  
Significance Level ◽  
Factors Affecting ◽  
Factors Affecting Performance

Construction time and cost are basic parameters for measuring project performance. Unfortunately, construction projects are facing poor time and cost performance globally. This poor performance is occurred due to several factors among which resource related factors play very important role. Hence, it is very essential to control the factors affecting performance of time and cost. This study assessed significance level of the resource related factors and determined effective measure to mitigate the factors. Gathering of data was done by questionnaire survey with the practitioners representing client, consultant and contractors involved in handling execution works. Statistical analysis of gathered responses revealed that High cost of machinery and its maintenance; and fluctuation of prices of materials on site are significant resource related factors affecting project cost performance while in affecting time performance, the significant factors are financial difficulties faced by contractors and high cost of machinery and its maintenance. This study also assessed the effectiveness level of the mitigation measures for improving time and cost performance. The findings of this study will be helpful for the practitioners to make necessary arrangement for improving time and cost performance.

A model for key success factors for outsourcing in project-based companies: integrating soft and dynamic approaches

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Delshad Hoseini ◽  
Mohsen Shafiei Nikabadi
Keyword(s):  
Dynamic Model ◽  
Success Factors ◽  
High Status ◽  
Construction Time ◽  
Interpretive Structural Modeling ◽  
Content Type ◽  
Factors Affecting ◽  
R And D ◽  
Outsourcing Success ◽  
Combination Of Methods

Purpose The purpose of this study is to achieve the dynamic model of outsourcing success factors in project-based companies. Design/methodology/approach This study is descriptive-survey in terms of method and practical in terms of purpose. To achieve the dynamic model of outsourcing success, 1,000 outsourcing articles published in high-status journals from 2017 to 2019 were first text-mining. Then, using the clustering technique, the factors affecting the success of outsourcing were obtained. To achieve the key variables, the variables obtained by interpretive structural modeling (ISM) were then leveled. Then, the strategic options development and analysis (SODA) technique has been used to achieve a consensus and coordination on factors relationships. Finally, the dynamic model of outsourcing success in GHODRAT CONTROL PARS Company has been modeled and implemented. Findings In total, five clusters and nine factors were extracted (strategy, management, performance, market, R&D, supplier, product, organizational data and outsourcing findings). In central and domain analysis, two factors, “Strategy” and “R and D,” were recognized as factors that have the most interaction and centrality. The result of the dynamic model indicate that the organization will significantly reduce the construction time of the power plant by improving the “R and D” factor. Originality/value In this study, various techniques have been combined. Therefore, one of the aspects of innovation in the present study is the combination of methods that have not been used earlier. The second aspect of this study’s innovation is using SODA technique to design the dynamic model of outsourcing success factors. Given that the scope of this study is the component affecting the success of outsourcing, so extensive research has been conducted in the field of articles worked in the field of outsourcing to get a comprehensive view of the components affecting the success of outsourcing, which has not been reviewed in other articles. In this study, in addition to identifying the effective factors, their identified and also how these variables affect the successful performance of outsourcing in the form of a dynamic model, and then analyzed.

scholarly journals Hollow-core precast and two-way solid slabs: Cost estimation and time duration comparison

2021 ◽  
Vol 2 (1) ◽  
pp. 29-35
Author(s):  
Osamah Sarhan ◽  
Mahdy Raslan ◽  
Gazi Tallawi
Keyword(s):  
Prestressed Concrete ◽  
Cost Estimation ◽  
Hollow Core ◽  
Construction Time ◽  
Time Duration ◽  
Factors Affecting ◽  
Hollow Core Slab ◽  
Duration Comparison ◽  
The Cost

Time and cost are important factors affecting the successful completion of the construction building project. This study analyses and examines the cost and time comparison of precast and cast-in-situ slabs of a particular building. Taking into account that slab is one of the important structural members, this study will take the hollow core slab in particular which can define as precast prestressed concrete elements contain an empty void inside of it which mostly used for floor, roof slabs and wall panels. The results demonstrate that the precast slab construction time is extremely faster in comparison with the cast-in-situ slab as it took around 31 of working days and 43 days in total after considering the holidays while the precast slab took around 9 working days only and 13 days in total. The results also show that the cast-in-situ slab is inferior in both cost and time duration. As cast-in-situ cost is 3.76 times higher than the precast slab, and the time duration is 3.31 times longer.

Ecological factors affecting distribution and abundance of Medicago minima

2011 ◽  
Vol 62 (7) ◽  
pp. 581 ◽  
Author(s):  
Diana E. Fresnillo-Fedorenko ◽  
Philip S. Cocks ◽  
John W. Bowden
Keyword(s):  
Western Australia ◽  
Ecological Factors ◽  
Annual Rainfall ◽  
Available Phosphorus ◽  
Soil Factors ◽  
Factors Affecting ◽  
Pasture Legumes ◽  
Ecological Success ◽  
Physical And Chemical ◽  
Pasture Legume

A survey was conducted to study the distribution and abundance of Medicago minima in relation to soil factors and rainfall. The collection targeted two regions of Western Australia where this species is known to occur. The frequency and pod density of M. minima and other naturalised annual pasture legumes (Medicago spp. and Trifolium spp.) was recorded per site. In addition, soil samples were taken and analysed for physical and chemical characteristics. Soils where M. minima was present were finer textured, higher in pH, nitrate and potassium, and lower in available phosphorus than soils where it was absent. These soils were commonly found in low rainfall areas. The highest frequency (55%) and density (4000 pods/m2) of M. minima were recorded in areas with 275 mm average annual rainfall. In a third of the collection sites M. minima was the only pasture legume present in the plant community. In the driest areas (260 mm annual rainfall) with the lowest content of available phosphorus (7.5 mg/kg) M. laciniata was associated with M. minima. In areas with 300–325 mm rainfall, M. minima was associated with M. truncatula, M. polymorpha and M. littoralis. The absence of M. minima in areas of Western Australia with >325 mm annual rainfall was related to its low tolerance to soil acidity. This paper examines the ecological success of M. minima with regard to its ability to use phosphorus in soils of high pH and lime content, and to set seed under water stress. It also discusses the distribution of M. minima in Western Australia in relation to its distribution in the Mediterranean Basin and other areas that the species is known to have colonised.

Sign in / Sign up

Export Citation Format

Share Document