IEM Journal: Recent submissions
Now showing items 161-180 of 310
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Determination of water requirement in a paddy field at Seberang Perak rice cultivation area
(The Institution of Engineers, Malaysia, 2010-12)Malaysia experiences water shortages as a result of a combination of drought, urbanisation and pollution. [1]. There are regions of water stress mainly due to low water resources supply, high demands, large agriculture ... -
Coded space-time-frequency OFDM over IEEE 802.11 fading channels
(The Institution of Engineers, Malaysia, 2007-03)This paper will present a 4-transmit and 1-receive (4Tx:1Rx) antenna system of coded space-time-frequency in conjunction with orthogonal frequency division multiplexing (Coded STF-OFDM). STF block code is concatenated ... -
Determining approximate Stackelberg strategies in carbon constrained energy planning using a hybrid fuzzy optimisation and adaptive multi-particle simulated annealing technique
(The Institution of Engineers, Malaysia, 2010-09)In recent years, there has been growing international concern about climate change as a result of greenhouse gas emissions from human activity. Various process integration techniques have thus been developed to assist in ... -
ARIMA models for bus travel time prediction
(The Institution of Engineers, Malaysia, 2010-06)In this paper, the time series model, Autoregressive Integrated Moving Average (ARIMA) is used to predict bus travel time. ARIMA model is simpler used for predicting bus travel time based on travel time series data (historic ... -
Nitrate-nitrogen concentration variationin groundwater flow in a paddy field
(The Institution of Engineers, Malaysia, 2010-12)This study was carried out to evaluate the influence of groundwater on nitrate-nitrogen concentration in a paddy field. Fertiliser if applied excessively can cause leaching into the soil and will penetrate deep into the ... -
Perbandingan jumlah kandungan elektron di atas variasi longitud khatulistiwa dan latitud menggunakan model IRI, NeQuick dan data IONEX
(The Institution of Engineers, Malaysia, 2010-06)Pengetahuan mengenai jumlah kandungan elektron (total electron content, TEC) di sesebuah kawasan terutamanya di kawasan khatulistiwa adalah penting bagi pembangunan sistem komunikasi menggunakan lapisan ionosfera. Kajian ... -
Inherent occupational health concept for chemical processes: A new perspective
(The Institution of Engineers, Malaysia, 2010-09)The concept of inherent safety was known since the last few decades. The idea was quickly spread from the origin UK to the USA and later, to the other parts of the world. The idea was then extended to environment and ... -
A concept development and proposed design procedure for rocking precast hollow core wall in warehouse
(The Institution of Engineers, Malaysia, 2010-06)Precast hollow core unit is commonly used in the construction of flooring system in precast reinforced concrete building in Malaysia. One of the technical challenges is to design and use precast hollow core unit without ... -
Keutuhan permukaan AISI H13 keluli terkeras dalam proses pemesinan nyahcas elektrik (EDM)
(The Institution of Engineers, Malaysia, 2010-06)Pemesinan nyahcas elektrik (EDM) ialah proses terma senyap yang menghasilkan beribu-ribu nyahcas elektrik dalam satu saat bagi menghakis keluar isipadu tertentu sesuatu logam. Proses ini digunakan secara meluas dalam situasi ... -
Effect of interphase forces on two-phase liquid: Liquid flow in horizontal pipe
(The Institution of Engineers, Malaysia, 2010-06)A two-fluid model (Eulerian-Elurian model) is used to simulate dispersed two-phase immiscible liquids (oil-water) in a horizontal pipe. Effect of interphase forces (drag, lift and turbulent dispersion) is discussed. In the ... -
Experimental evaluation of the static and dynamic characteristics of an offshore crane model
(The Institution of Engineers, Malaysia, 2010-06)The knowledge of the static and dynamic characteristics of cranes is of utmost importance in their design and construction in order to optimise the construction material costs as well as to optimize their response to static ... -
Production of non shredded empty fruit bunch semi-compost
(The Institution of Engineers, Malaysia, 2010-12)Composting of the empty fruit bunch (EFB) with the palm oil mill effluent (POME) could simultaneously treat the solid and liquid waste from palm oil mill. With the aim to reduce the composting yard area, production of ... -
A review of nanoporous materials derived from Covalent Organic Frameworks
(The Institution of Engineers, Malaysia, 2010-09)The implementation of nanoporous materials is becoming increasingly more prevalent due to their unique characteristics, which make them highly applicable in a multitude of different functionalities. Covalent Organic ... -
Heterogeneous esterification of free fatty acid to biodiesel
(The Institution of Engineers, Malaysia, 2010-09)The potential of sulphated zirconia (SZ) as heterogeneous acid catalyst for esterification of free fatty acid (FFA) to biodiesel has been investigated. Experiments using oleic acid as a model compound preceded the ... -
Optimisation of hydrolysis conditions for ethanol production from sorghum starch
(The Institution of Engineers, Malaysia, 2010-09)The conversion of starch to sugar can be achieved by hydrolysis process. The two-step enzymatic hydrolysis of sweet sorghum was performed by commercially available α-amylase and glucoamylase. An optimisation study was ... -
Physical and thermochemical characterisation of Malaysian biomass ashes
(The Institution of Engineers, Malaysia, 2010-09)The agriculture sector in Malaysia has been growing rapidly over the years and this leads to large amount of agricultural waste. However, sustainable development and increasing fuel demand necessity had identified biomass ... -
Image visualisation and classification of MODIS/ASTER Airborne Simulator (MASTER) remotely sensed data for agricultural area
(The Institution of Engineers, Malaysia, 2006-12)A Best Band Selection Index (BBSI) algorithm to select the best band combination for image visualization and classification of high spectral resolution remotely sensed dataset was introduced in this paper. The BBSI is ... -
Pengesanan kerosakan dalam rangkaian FTTH dengan keupayaan pemprosesan GUI perisian MATLAB
(The Institution of Engineers, Malaysia, 2010-06)Kajian ini menekankan pembangunan antaramuka pengguna bergrafik (GUI) untuk Sistem Pengesanan Kerosakan Terpusat (CFDS) dengan menggunakan perisian MATLAB untuk meningkatkan keberkesanan, kelengkapan dan keboleharapan ... -
Investigation of process yield in the transesterification of coconut oil with heterogeneous calcium oxide catalyst
(The Institution of Engineers, Malaysia, 2009-12)The commercial success of biodiesels has to date been limited by high production costs of vegetable oil methyl esters. High feedstock costs are compounded by side reactions such as soap formation during conversion using ... -
Nano-sized Mn2O3 prepared by a novel solvolysis route as an electrochemical capacitor electrode material
(The Institution of Engineers, Malaysia, 2008-09)Nano-sized manganese oxide (Mn2O3) was synthesized using a solvothermal route with the presence of citric acid as the chelating agent and acetone as the handle. The sample obtained was heated at 400˚C, 600˚C and 800˚C ...