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The Project Schedule Control Method Under the Influence of Uncertain Factors and Resource Constraints
Issue:
Volume 2, Issue 1, February 2017
Pages:
1-6
Received:
18 October 2016
Accepted:
26 December 2016
Published:
16 January 2017
DOI:
10.11648/j.jccee.20170201.11
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Abstract: Due to the reduce of the national investment and technology development, the market environment changes rapidly and the competition become more and more fierce, the situation require companies to improve the management level, at the same time the uncertainty and the complexity of construction projects also increase sharply, competition for scarce resources gradually intensified, all those factors leading to more and more difficult to complete the project timely, this paper adopt Delphi method to identify schedule risk, by introducing the severity index and important index as secondary indexes, through schedule risk analysis to determine the schedule risk control valve value (sensitivity index), take the sensitivity index as a valid trigger out decision basis of action, to build a comprehensive (project - activity layer) framework of project schedule risk identification, monitoring and correction organization. It can help project manager to identify the risk in advance, good for adopt some measures to control the risk and make the goal come true.
Abstract: Due to the reduce of the national investment and technology development, the market environment changes rapidly and the competition become more and more fierce, the situation require companies to improve the management level, at the same time the uncertainty and the complexity of construction projects also increase sharply, competition for scarce r...
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Heat Balance and Its Effect on Building Types
Ahmed Hasson,
Ali E. Kubba,
Ammar I. Kubba,
Gregory Hall
Issue:
Volume 2, Issue 1, February 2017
Pages:
7-11
Received:
3 October 2016
Accepted:
9 January 2017
Published:
1 February 2017
DOI:
10.11648/j.jccee.20170201.12
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Abstract: The performance of direct heat gain system is affective by the sever summer heat environment in the building design types in Iraq. Therefore, it is important to consider the outdoor understand the trends of local buildings (modern and traditional intensive buildings type) climate environment while designing direct heat gain system. Base on analyzing the long term weather data over the past 10 years and examine the practical issues of building design, useful climatic information and patterns are identified. The provided information will enable people to better and to build up the resources for assessing important issues of renewable energy and environmental design and to determine indoor environmental quality based on the outdoor microclimate. The simulation result reveals how the relationship between the outdoor environment and indoor factors (indoor design building) the performance of direct heat gain system. The results indicated that the thermal storage mass of direct of direct heat gain system raises the room air temperature due to the large area of window. The climatic data currently being used for energy design calculations leads to inaccuracies in predictions of energy use. Heating coefficients were consistently positive and their values varied between 0.1, to 0.46, while albedo values varied between 0.19 and 0.37. The results indicated that there is little monthly variation in the values of nocturnal net radiation. The energy cost of cooling fuel estimated for both building types.
Abstract: The performance of direct heat gain system is affective by the sever summer heat environment in the building design types in Iraq. Therefore, it is important to consider the outdoor understand the trends of local buildings (modern and traditional intensive buildings type) climate environment while designing direct heat gain system. Base on analyzin...
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Assessment of Occupational Health and Safety in Khartoum Drinking Water Facilities
Hassan Ahmed Sulieman Abdelrahman
Issue:
Volume 2, Issue 1, February 2017
Pages:
12-16
Received:
4 January 2017
Accepted:
13 January 2017
Published:
9 February 2017
DOI:
10.11648/j.jccee.20170201.13
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Abstract: This paper aims to identify risks that are likely to affect workers and addressed the problems of work injuries in drinking water facilities, which leads to reduce performance, production and quality in drinking water treatment process. The study assumed that occupational health & safety system was executed in all Khartoum state drinking water facilities. Soba and Bahri stations have been visited, personal interviews with operational and administrative departments and then primary data pertaining to each stage of treatment was collected in both stations. Also a questionnaire developed for this study, distributed to the workers and analyzed using statistical techniques. The study concluded that some of risks in the Khartoum state drinking water facilities cause death, permanent disability and temporary disability. The study recommended that a program of occupational health and safety for all drinking water facilities in the Khartoum state must be developed, implemented and monitored.
Abstract: This paper aims to identify risks that are likely to affect workers and addressed the problems of work injuries in drinking water facilities, which leads to reduce performance, production and quality in drinking water treatment process. The study assumed that occupational health & safety system was executed in all Khartoum state drinking water faci...
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Involvement of Household, Government and NGOs in Solid Waste Management in Khulna City: A Comparative Analysis
Emran Hossain,
Kazi Tamzidul Islam,
Mohammad Mainul Bashar,
Mohammad Rafizul Islam
Issue:
Volume 2, Issue 1, February 2017
Pages:
17-26
Received:
17 September 2014
Accepted:
29 September 2014
Published:
18 February 2017
DOI:
10.11648/j.jccee.20170201.14
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Abstract: This study has analyzed the generation, characteristics and especially disposal system of solid waste in Khulna city, as urbanization and economic progress increases consumption of resources also tend to increase of waste at the same rate. This leads to immense negative impact on environment in the sense of generation of waste by the urban. Improper management of solid waste is one of the main causes of environmental pollution and degradation in many cities. Developing cities like Khulna, the third largest metropolitan city in Bangladesh, have now begun to acknowledge the environmental and public health risks associated with uncontrolled dumping of metropolitan solid waste (MSW). To these attempts, a survey was conducted to observe the present scenario of total MSW management system in Khulna city. Result reveals that near about 9-11% of total generated wastes are collected by door-to-door collection system provided by mainly non-governmental organizations (NGOs) and community based organizations (CBOs) using 46 non-motorized rickshaw vans. Moreover, the major portion of collected wastes is disposed to the nearest secondary disposal site (SDS) by these organizations and then transferred to ultimate disposal site (UDS) or to private low-lying lands from there by the city authority. A small portion of organic wastes is going to the composting plants of NGOs. In this survey it is seen that major identified problems of existing management of MSW by NGOs and CBOs are the irregular collection of solid waste, nonpayment of service charges by the beneficiaries, involvement of child labor, reluctance of city dwellers participation etc. Finally the paper suggests that some measures and steps should be taken to keep the city nice and healthy.
Abstract: This study has analyzed the generation, characteristics and especially disposal system of solid waste in Khulna city, as urbanization and economic progress increases consumption of resources also tend to increase of waste at the same rate. This leads to immense negative impact on environment in the sense of generation of waste by the urban. Imprope...
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Impacts of Waste Dumps on the Health of Neighbours: A Case Study of Olusosun Waste Dump, Ojota, Lagos State, Nigeria
Olufemi Adedamola Oyedele,
Adeniyi Olufolahan Oyedele
Issue:
Volume 2, Issue 1, February 2017
Pages:
27-33
Received:
14 October 2016
Accepted:
9 February 2017
Published:
27 February 2017
DOI:
10.11648/j.jccee.20170201.15
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Abstract: Poorly managed and wrongly sited waste dumps in living areas may serve as pathogen and epidemiology centres. Germs (viruses, bacteria and fungi) breed regularly in waste dumps and landfills. Waste dumps, incinerator plants and land-fills may emit toxic compounds that are detrimental to human health and well-being. Exposed waste dumps and land-fills are also eyesores that are social menace to the residents where they are sited. Uncontrolled waste dumps are danger zones to scavengers, mostly youths, who may tramp on infected sharp objects while searching for ‘treasure’. Waste dumps, where wastes are burnt openly, generate carbon dioxide, carbon monoxide and other gases due to burning of remnants of chemicals containing sulphide, nitrate, fluoride, benzene, nicotine, lead etc, which react with oxygen to form poisonous gases that are inhaled by residents. These antibodies affect the lung and weaken the heart and other organs in the body. Medical wastes like bandages, cotton wools, medicine containers, syringes, needles and bottles should be professionally managed because their reuse is dangerous. The objectives of this study is to examine the health implication of improper management of waste dumps, to highlight the danger in the local methods of waste management predominant in developing nations, to evaluate the various diseases caused by waste dumping sites, incinerator plants and landfills and to recommend alternative methods of waste management that will imbibe the doctrine of sustainable development. Quantitative and qualitative data were analysed to draw inference on the impacts of waste dumps on public health.
Abstract: Poorly managed and wrongly sited waste dumps in living areas may serve as pathogen and epidemiology centres. Germs (viruses, bacteria and fungi) breed regularly in waste dumps and landfills. Waste dumps, incinerator plants and land-fills may emit toxic compounds that are detrimental to human health and well-being. Exposed waste dumps and land-fills...
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