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Estimation of missing values in air pollution data using single imputation techniques
(Science Society of Thailand, 2008)
Air pollution data obtained using automated machines often contain missing values which can cause bias due to systematic differences between observed and unobserved data. We used interpolation and mean imputation techniques ...
The Replacement of Missing Values of Continous Air Pollution Monitoring Data using Mean Top Bottom Imputation technique
(Kolej Universiti Kejuruteraan Utara Malaysia, 2006)
Air pollutants data such as PM10 carbon monoxide, sulphur dioxide and ozone concentration were obtained from automated monitoring stations. These data usually contain missing values that can cause bias due to systematic ...
Preliminary study on concrete with polystyrene waste coarse aggregate
(Construction Industry Development Board, Malaysia (CIDB), Construction Research Institute of Malaysia (CREAM) & Universiti Teknologi MARA (UiTM), 2007-03-14)
Polymer recycling has received a great deal of attention in this recent year. Presently, small percentage of polymer wastes in Malaysia has been under going the recycling process. This recycling process has typically been ...
Estimation of missing values for air pollution data using Interpolation technique
(Universiti Malaysia Perlis, 2006)
Air pollution data such as PM10, sulphur dioxide, ozone and carbon monoxide are usually obtained using automated machines located at different sites. These are usually due to mechanical failure, routine
maintenance, changes ...
Easy Fix Concrete Block
(Malaysian Association of Research Scientists (MARS), 2007-03-29)
Easy Fix Concrete Block is one of a new design of concrete block. This type of concrete block is Motarless Concrete Interlocking Blocks System. Concrete block inherent fire resistance, easy to use and attractive makes it ...
Urban air quality management in Malaysia and Thailand: A review
(Universiti Teknologi Malaysia (UTM), 2009-06-02)
Air Pollution is an important problem in East Asia and the Pacific Region, especially in the big cities and industrial zones. Increased economic development in the Asian region has often led to rapid and unplanned urbanization. ...