TENCON 2010 - 2010 IEEE Region 10 Conference, 2010
Abstract Weed classification is a serious issue in the agricultural research. Weed classification... more Abstract Weed classification is a serious issue in the agricultural research. Weed classification is a necessity in identifying weed species for control. Many classification techniques have been used to identify weed based on images, however, most of the techniques only measure the percentages of accuracy but the detailed of classifier parameter are not analyzed and discussed. Therefore, in this work, feature vectors of weed images extracted using Gabor Wavelet and Fast Fourier Transform (FFT) were employed ...
Thermoelectric power (TEP) measurements were carried out on six samples of LQA alloys from two di... more Thermoelectric power (TEP) measurements were carried out on six samples of LQA alloys from two different series, namely FeZr and Fe(Co)B, at relatively low temperatures. A profile of the TEP shows a Gaussian trend in our observations for each specimen. The scattering ...
A 29-year-old man presented with a 3 day history of right lower quadrant pain, nausea and vomitin... more A 29-year-old man presented with a 3 day history of right lower quadrant pain, nausea and vomiting. There was tenderness in the right lower quadrant. At surgery the appendix was normal but an infarcted terminal ileum segment was found and resected. Histopathological examination was suggestive of vasculitis. The patient was discharged in good condition and follow-up for the first year was unremarkable. Unfortunately he developed another episode of bowel ischaemia in the second year and underwent resection of a short segment of proximal ileum. An autoimmune profile was negative. However, subsequent blood tests confirmed polycythaemia. Small bowel infarction due to polycythaemia in a young patient is rare and may be difficult to diagnose on clinical grounds.
2007 5th Student Conference on Research and Development, 2007
Abstract Vulnerability assessment of a power system has been of great concern due to the continua... more Abstract Vulnerability assessment of a power system has been of great concern due to the continual blackouts in recent years which indicate that a power system today is too vulnerable to withstand an unforeseen catastrophic contingency. This paper presents a new approach to assess vulnerability of a power system based on radial basis function neural network. A new feature extraction method named as the neural network weight extraction is also proposed to reduce the number of input features to the neural network. The ...
Transmission of electromagnetic plane wave through a slab of reciprocal chiral medium has been mo... more Transmission of electromagnetic plane wave through a slab of reciprocal chiral medium has been modelled using fractional curl operator. It is noted that when order of the fractional curl operator becomes zero, the equivalent situation may correspond to absence of the chiral slab. Variation of the order of fractional curl operator may explore situations which may be regarded as intermediate
2013 IEEE International Conference on Signal and Image Processing Applications, 2013
ABSTRACT Steady state visual evoked potential (SSVEP) is one of the BCI responses that is elicite... more ABSTRACT Steady state visual evoked potential (SSVEP) is one of the BCI responses that is elicited from the external stimulus. SSVEP is a noisy signal that requires signal smoothing before any further processing can be performed. In this paper, we implement double exponential smoothing (DES) to minimize the ripple of SSVEP response in the frequency domain. The input signal was generated artificially by using trigonometric function (sine wave). Three fundamental frequencies were analyzed, which are 30, 15 and 7.5 Hz that are based on refresh rate of the stimulator. Euclidean distance (ED) technique is used as the evaluation metric to calculate the error between the results and ground truth. The results show that the smoothed signal by DES technique achieved a lower value of ED compared to the original signal.
Background Laparoscopic hernia repair has emerged as an eVective alternative method for treating ... more Background Laparoscopic hernia repair has emerged as an eVective alternative method for treating inguinal hernias. The ability to provide this service as day surgery or shortstay (23-h stay) treatment makes it an attractive method in this age of resource limitations. The technique is cost-eVective when the use of disposable instruments is kept to a minimum. Methods Our team performed laparoscopic transabdominal pre-peritoneal (TAPP) inguinal hernia repair on 1,389 patients in the period from September 1999 to March 2007. We take this opportunity to discuss the lessons we have learnt and our experience and views with regards to certain procedure-speciWc problems encountered by many of our peers. Results A variety of commonly encountered inguinal and groin hernias were treated by TAPP with good results, minimal morbidity (4.39%) and one mortality. We have discussed our views on technical aspects of the procedure, such as the extent of pre-peritoneal dissection, methods of treating the hernia sac, the size and number of pre-peritoneal prosthetic meshes deployed, Wxation of the mesh and reconstitution of the peritoneum. Our views on the causes and our strategies for managing complications such as seroma formation (3.09%), recurrence (0.29%), bleeding (0.36%) and mesh infection (0.14%) have been outlined. We believe that incidental hernias (N=150) discovered during initial laparoscopy can be safely treated with no added morbidity, provided the patients' views and consent regarding the treatment are given due consideration. Conclusion Laparoscopic TAPP hernia repair has proven to be an eYcient method of providing treatment for groin hernias. Our experience over the last eight years has given us over a thousand convincing reasons to continue working and improving upon this service.
ABSTRACT Surface hardening of GCr15 bearing steel ring was carried out using CW CO(2) laser. The ... more ABSTRACT Surface hardening of GCr15 bearing steel ring was carried out using CW CO(2) laser. The laser power used was in the range of 300 to 500 Watts. A rectangular beam shape was used to cover the area to be hardened. A three fold increase in the hardness of the transformed zone was achieved. The depth of hardness attained was around 1mm. The depth and width of the laser treated zone were studied as function of laser power and working speed for specific spot size. The microstructure of the transformed zone is also discussed. Subzero cooling technique was applied to convert the retained austenite to martensite.
This paper describes the design of wave digital filters for discrete Hilbert transformer realizat... more This paper describes the design of wave digital filters for discrete Hilbert transformer realization. A method for designing real and complex half-band wave digital filters (WDFs) with a minimum number of multipliers is afforded where the multiplier coefficients for the adaptors are calculated directly from the digital domain transfer functions. This technique uses the equations derived for a class of infinite impulse response (IIR) filter and hence avoids the conventional technique of synthesizing a WDF from an analogue reference filter. The selection of the adaptor configuration is determined from the multiplier coefficient values. A minimum multiplier realization of real half-band WDFs can be obtained to meet the lowpass digital filter magnitude specifications. By applying a transformation equation, a complex half-band WDF suitable for the realization of the discrete Hilbert transformer with a minimum number of multiplier is obtained. r
in the compacted compartment were excised. These results clearly demonstrate the involvement of a... more in the compacted compartment were excised. These results clearly demonstrate the involvement of a root-sourced signal in mediating responses to compacted soil; the role of ABA in providing this signal and future applications of the compaction procedures reported here are discussed.
0 The kinetics of decomposition of the following conformationally restricted Nchloro-a-amino acid... more 0 The kinetics of decomposition of the following conformationally restricted Nchloro-a-amino acids were studied: l -amino-lcyclopentanecarboxylic acid (2), 1 -amino-1 -cyclohexanecarboxylic acid (4), 2-amino-2-norbornanecarboxylic acid (6), and 2-amino-2benzonorbornanecarboxylic acid (8). The first-order rate constants obtained were 0.520, 5.197, 0.198, and 0.078, respectively, which correlated with the ring strain in the structurally related cyclic ketones cyclopentanone, cyclohexanone, norborane-2-one, and benzonorbornane-2-one. The data are supportive of a concerted mechanism for the decomposition reaction involving an imine-like transition state. c 1 H oci-+ R N H~ , R-N: + OH-I2 + 2 s*032-> 2 I-+ s40;-Scheme I Scheme II 0022-3549/90/1200-1 12 1 $0 1 . 0010
Abstract In this paper, we describe a system which uses array filters for processing the recordin... more Abstract In this paper, we describe a system which uses array filters for processing the recordings of an array of transducers for the purpose of locating possible flaws in the material being tested nondestructively. When applied, in order to focus the array outputs at a point inside the material, these filters are able to attenuate, very effectively, interfering residual energy scattered from adjacent flaws, as well as random noise. If there is a flaw at the point of focus, the summed output of the filters will have a large signal at a delay time ...
The blood levels of propranolol in rats and dogs were compared after the administration of nasal,... more The blood levels of propranolol in rats and dogs were compared after the administration of nasal, intravenous, and oral solutions. The results indicate that the blood drug levels after nasal and intravenous administration were identical, but the oral administration resulted in considerably lower blood levels. Sustained-release formulations of the drug also were administered nasally and resulted in low initial but prolonged blood levels. The bioavailability of the sustained-release formulation was identical to that of the intravenous administration.
1] Changes in indices of climate extremes are studied on the basis of daily series of temperature... more 1] Changes in indices of climate extremes are studied on the basis of daily series of temperature and precipitation observations from 116 meteorological stations in central and south Asia. Averaged over all stations, the indices of temperature extremes indicate warming of both the cold tail and the warm tail of the distributions of daily minimum and maximum temperature between 1961 and 2000. For precipitation, most regional indices of wet extremes show little change in this period as a result of low spatial trend coherence with mixed positive and negative station trends. Relative to the changes in the total amounts, there is a slight indication of disproportionate changes in the precipitation extremes. Stations with near-complete data for the longer period of 1901-2000 suggest that the recent trends in extremes of minimum temperature are consistent with long-term trends, whereas the recent trends in extremes of maximum temperature are part of multidecadal climate variability.
TENCON 2010 - 2010 IEEE Region 10 Conference, 2010
Abstract Weed classification is a serious issue in the agricultural research. Weed classification... more Abstract Weed classification is a serious issue in the agricultural research. Weed classification is a necessity in identifying weed species for control. Many classification techniques have been used to identify weed based on images, however, most of the techniques only measure the percentages of accuracy but the detailed of classifier parameter are not analyzed and discussed. Therefore, in this work, feature vectors of weed images extracted using Gabor Wavelet and Fast Fourier Transform (FFT) were employed ...
Thermoelectric power (TEP) measurements were carried out on six samples of LQA alloys from two di... more Thermoelectric power (TEP) measurements were carried out on six samples of LQA alloys from two different series, namely FeZr and Fe(Co)B, at relatively low temperatures. A profile of the TEP shows a Gaussian trend in our observations for each specimen. The scattering ...
A 29-year-old man presented with a 3 day history of right lower quadrant pain, nausea and vomitin... more A 29-year-old man presented with a 3 day history of right lower quadrant pain, nausea and vomiting. There was tenderness in the right lower quadrant. At surgery the appendix was normal but an infarcted terminal ileum segment was found and resected. Histopathological examination was suggestive of vasculitis. The patient was discharged in good condition and follow-up for the first year was unremarkable. Unfortunately he developed another episode of bowel ischaemia in the second year and underwent resection of a short segment of proximal ileum. An autoimmune profile was negative. However, subsequent blood tests confirmed polycythaemia. Small bowel infarction due to polycythaemia in a young patient is rare and may be difficult to diagnose on clinical grounds.
2007 5th Student Conference on Research and Development, 2007
Abstract Vulnerability assessment of a power system has been of great concern due to the continua... more Abstract Vulnerability assessment of a power system has been of great concern due to the continual blackouts in recent years which indicate that a power system today is too vulnerable to withstand an unforeseen catastrophic contingency. This paper presents a new approach to assess vulnerability of a power system based on radial basis function neural network. A new feature extraction method named as the neural network weight extraction is also proposed to reduce the number of input features to the neural network. The ...
Transmission of electromagnetic plane wave through a slab of reciprocal chiral medium has been mo... more Transmission of electromagnetic plane wave through a slab of reciprocal chiral medium has been modelled using fractional curl operator. It is noted that when order of the fractional curl operator becomes zero, the equivalent situation may correspond to absence of the chiral slab. Variation of the order of fractional curl operator may explore situations which may be regarded as intermediate
2013 IEEE International Conference on Signal and Image Processing Applications, 2013
ABSTRACT Steady state visual evoked potential (SSVEP) is one of the BCI responses that is elicite... more ABSTRACT Steady state visual evoked potential (SSVEP) is one of the BCI responses that is elicited from the external stimulus. SSVEP is a noisy signal that requires signal smoothing before any further processing can be performed. In this paper, we implement double exponential smoothing (DES) to minimize the ripple of SSVEP response in the frequency domain. The input signal was generated artificially by using trigonometric function (sine wave). Three fundamental frequencies were analyzed, which are 30, 15 and 7.5 Hz that are based on refresh rate of the stimulator. Euclidean distance (ED) technique is used as the evaluation metric to calculate the error between the results and ground truth. The results show that the smoothed signal by DES technique achieved a lower value of ED compared to the original signal.
Background Laparoscopic hernia repair has emerged as an eVective alternative method for treating ... more Background Laparoscopic hernia repair has emerged as an eVective alternative method for treating inguinal hernias. The ability to provide this service as day surgery or shortstay (23-h stay) treatment makes it an attractive method in this age of resource limitations. The technique is cost-eVective when the use of disposable instruments is kept to a minimum. Methods Our team performed laparoscopic transabdominal pre-peritoneal (TAPP) inguinal hernia repair on 1,389 patients in the period from September 1999 to March 2007. We take this opportunity to discuss the lessons we have learnt and our experience and views with regards to certain procedure-speciWc problems encountered by many of our peers. Results A variety of commonly encountered inguinal and groin hernias were treated by TAPP with good results, minimal morbidity (4.39%) and one mortality. We have discussed our views on technical aspects of the procedure, such as the extent of pre-peritoneal dissection, methods of treating the hernia sac, the size and number of pre-peritoneal prosthetic meshes deployed, Wxation of the mesh and reconstitution of the peritoneum. Our views on the causes and our strategies for managing complications such as seroma formation (3.09%), recurrence (0.29%), bleeding (0.36%) and mesh infection (0.14%) have been outlined. We believe that incidental hernias (N=150) discovered during initial laparoscopy can be safely treated with no added morbidity, provided the patients' views and consent regarding the treatment are given due consideration. Conclusion Laparoscopic TAPP hernia repair has proven to be an eYcient method of providing treatment for groin hernias. Our experience over the last eight years has given us over a thousand convincing reasons to continue working and improving upon this service.
ABSTRACT Surface hardening of GCr15 bearing steel ring was carried out using CW CO(2) laser. The ... more ABSTRACT Surface hardening of GCr15 bearing steel ring was carried out using CW CO(2) laser. The laser power used was in the range of 300 to 500 Watts. A rectangular beam shape was used to cover the area to be hardened. A three fold increase in the hardness of the transformed zone was achieved. The depth of hardness attained was around 1mm. The depth and width of the laser treated zone were studied as function of laser power and working speed for specific spot size. The microstructure of the transformed zone is also discussed. Subzero cooling technique was applied to convert the retained austenite to martensite.
This paper describes the design of wave digital filters for discrete Hilbert transformer realizat... more This paper describes the design of wave digital filters for discrete Hilbert transformer realization. A method for designing real and complex half-band wave digital filters (WDFs) with a minimum number of multipliers is afforded where the multiplier coefficients for the adaptors are calculated directly from the digital domain transfer functions. This technique uses the equations derived for a class of infinite impulse response (IIR) filter and hence avoids the conventional technique of synthesizing a WDF from an analogue reference filter. The selection of the adaptor configuration is determined from the multiplier coefficient values. A minimum multiplier realization of real half-band WDFs can be obtained to meet the lowpass digital filter magnitude specifications. By applying a transformation equation, a complex half-band WDF suitable for the realization of the discrete Hilbert transformer with a minimum number of multiplier is obtained. r
in the compacted compartment were excised. These results clearly demonstrate the involvement of a... more in the compacted compartment were excised. These results clearly demonstrate the involvement of a root-sourced signal in mediating responses to compacted soil; the role of ABA in providing this signal and future applications of the compaction procedures reported here are discussed.
0 The kinetics of decomposition of the following conformationally restricted Nchloro-a-amino acid... more 0 The kinetics of decomposition of the following conformationally restricted Nchloro-a-amino acids were studied: l -amino-lcyclopentanecarboxylic acid (2), 1 -amino-1 -cyclohexanecarboxylic acid (4), 2-amino-2-norbornanecarboxylic acid (6), and 2-amino-2benzonorbornanecarboxylic acid (8). The first-order rate constants obtained were 0.520, 5.197, 0.198, and 0.078, respectively, which correlated with the ring strain in the structurally related cyclic ketones cyclopentanone, cyclohexanone, norborane-2-one, and benzonorbornane-2-one. The data are supportive of a concerted mechanism for the decomposition reaction involving an imine-like transition state. c 1 H oci-+ R N H~ , R-N: + OH-I2 + 2 s*032-> 2 I-+ s40;-Scheme I Scheme II 0022-3549/90/1200-1 12 1 $0 1 . 0010
Abstract In this paper, we describe a system which uses array filters for processing the recordin... more Abstract In this paper, we describe a system which uses array filters for processing the recordings of an array of transducers for the purpose of locating possible flaws in the material being tested nondestructively. When applied, in order to focus the array outputs at a point inside the material, these filters are able to attenuate, very effectively, interfering residual energy scattered from adjacent flaws, as well as random noise. If there is a flaw at the point of focus, the summed output of the filters will have a large signal at a delay time ...
The blood levels of propranolol in rats and dogs were compared after the administration of nasal,... more The blood levels of propranolol in rats and dogs were compared after the administration of nasal, intravenous, and oral solutions. The results indicate that the blood drug levels after nasal and intravenous administration were identical, but the oral administration resulted in considerably lower blood levels. Sustained-release formulations of the drug also were administered nasally and resulted in low initial but prolonged blood levels. The bioavailability of the sustained-release formulation was identical to that of the intravenous administration.
1] Changes in indices of climate extremes are studied on the basis of daily series of temperature... more 1] Changes in indices of climate extremes are studied on the basis of daily series of temperature and precipitation observations from 116 meteorological stations in central and south Asia. Averaged over all stations, the indices of temperature extremes indicate warming of both the cold tail and the warm tail of the distributions of daily minimum and maximum temperature between 1961 and 2000. For precipitation, most regional indices of wet extremes show little change in this period as a result of low spatial trend coherence with mixed positive and negative station trends. Relative to the changes in the total amounts, there is a slight indication of disproportionate changes in the precipitation extremes. Stations with near-complete data for the longer period of 1901-2000 suggest that the recent trends in extremes of minimum temperature are consistent with long-term trends, whereas the recent trends in extremes of maximum temperature are part of multidecadal climate variability.
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Papers by A. Hussain