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Search Results: 1 - 10 of 421416 matches for " Helmi Z.M. Shafri "
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Hyperspectral Remote Sensing of Urban Areas: An Overview of Techniques and Applications
Helmi Z.M. Shafri,Ebrahim Taherzadeh,Shattri Mansor,Ravshan Ashurov
Research Journal of Applied Sciences, Engineering and Technology , 2012,
Abstract: Over the past two decades, hyperspectral remote sensing from airborne and satellite systems has been used as a data source for numerous applications. Hyperspectral imaging is quickly moving into the mainstream of remote sensing and is being applied to remote sensing research studies. Hyperspectral remote sensing has great potential for analysing complex urban scenes. However, operational applications within urban environments are still limited, despite several studies that have explored the capabilities of hyperspectral data to map urban areas. In this paper, we review the methods for urban classification using hyperspectral remote sensing data and their applications. The general trends indicate that combined spatial-spectral and sensor fusion approaches are the most optimal for hyperspectral urban analysis. It is also clear that urban hyperspectral mapping is currently limited to airborne data, despite the availability of spaceborne hyperspectral systems. Possible future research directions are also discussed.
Development of a Generic Model for the Detection of Roof Materials Based on an Object-Based Approach Using WorldView-2 Satellite Imagery  [PDF]
Ebrahim Taherzadeh, Helmi Z. M. Shafri
Advances in Remote Sensing (ARS) , 2013, DOI: 10.4236/ars.2013.24034
Abstract:

The detection of impervious surface (IS) in heterogeneous urban areas is one of the most challenging tasks in urban remote sensing. One of the limitations in IS detection at the parcel level is the lack of sufficient training data. In this study, a generic model of spatial distribution of roof materials is considered to overcome this limitation. A generic model that is based on spectral, spatial and textural information which is extracted from available training data is proposed. An object-based approach is used to extract the information inherent in the image. Furthermore, linear discriminant analysis is used for dimensionality reduction and to discriminate between different spatial, spectral and textural attributes. The generic model is composed of a discriminant function based on linear combinations of the predictor variables that provide the best discrimination among the groups. The discriminate analysis result shows that of the 54 attributes extracted from the WorldView-2 image, only 13 attributes related to spatial, spectral and textural information are useful for discriminating different roof materials. Finally, this model is applied to different WorldView-2 images from different areas and proves that this model has good potential to predict roof materials from the WorldView-2 images without using training data.

Monitoring the Impacts of Drought on Land Use/Cover: A Developed Object-based Algorithm for NOAA AVHRR Time Series Data
A. Mokhtari,S.B. Mansor,A.R. Mahmud,Z.M. Helmi
Journal of Applied Sciences , 2011,
Abstract: This project was implemented on Zayandeh-Rud basin which is one of the most important and strategic regions of Iran. The main goal of the research was to monitor and evaluate the temporal land use/cover changes affected by drought episodes over a 10-year period (1992-2003). Primarily, raw weather data preparation activities were carried out to produce Standard Precipitation Index (SPI) spatial point thematic layer as a base map, then, satellite image pre-processing works applied on the remotely sensed data to generate the time series land use/cover maps. As a novel idea in this study, it developed a new object-based classification algorithm for AVHRR (Advanced Very High Resolution Radiometer) data. The model works based on the seasonal values of Normalized-difference Vegetation Index (NDVI) in the study area. The algorithm was statistically compared with maximum likelihood supervised classification method. Results demonstrated an increase in overall accuracy from 74.34 to 90.07% and the Kappa index from 70.58 to 88.8%. Based on the statistical analysis results, drought had not statistically significant effect on the land use/cover changes. Therefore, there are more important factors other than natural weather drought in the study area and these could be summarized as a term of disorder on land management in the Zayandeh-Rud river basin. Results of the investigation provide a scientific tool enabling governmental land and water managers to monitor, make decision and manage the water crises due to drought upon the catchment.
Childhood Abuse among Children Involved in Prostitution in Malaysia
Z.M. Lukman
The Social Sciences , 2013,
Abstract: The current study is aim to investigate the link between childhood abuse and the involvement of children in prostitution. Two methods of data collection were used in this study; that is semi-structured interview and narrative interview. Altogether, 63 young women safeguarded from prostitution in two rehabilitation centres participated in this study as respondents. The findings suggest that the vast majority of prostituted young women in this sample are being emotionally and physically abused and half of them are being sexually abused during childhood before they were drawn into prostitution. Around 67% of respondents were found to have suffered from multiple abuse types. Furthermore, the majority of respondents (78.8%) did suffer from multiple negative feelings like feel hurt and angry, depressed, disowned by the family, dirty, useless and wanting revenge.
ANISOTROPY OF (1× 1)-SURFACE FREE ENERGIES OF CRYSTALS
Z.M.,Yu
金属学报(英文版) , 2001,
Abstract: 1. IntroductionInterest in the surface free energy (SFE) of crystals is increasing as a consequence ofmodern experiments in the fields such as crystal growth, crystalline morphology, equilibra-tion of grain boundaries, sintering, adsorption and surface catalysis and .t.1--2].It is well known that the SFE of a crystal is generally dependent on the orientation ofthe surface3]. Some previous works have been done to calculate and measure the SFEl4--8].But, a generally theoretical method is s…
Marketing research-level marketing and logistics operation of the machine-building enterprises of Khmelnitsky region
Z.M. Andrushkevich
Marketing ì Mened?ment Innovacìj , 2011,
Abstract: The article defines the role of marketing research in the analysis of marketing and logistics industries. The necessity of conducting regular market research. Presents the results of market research to determine the level of marketing and logistics activities of industrial enterprises of Khmelnitsky region, identified weaknesses practical use of marketing and logistics functions in the enterprise.
The Effect of Cowpea Oligosaccharides on Gas Production in Adult Rats
Z.M. Ofuya
Asian Journal of Plant Sciences , 2006,
Abstract: The effect of cowpea oligosaccharides and oligosaccharide free meal on gas production in adult female weanling rats was studied. The pattern of hydrogen produced in 24 h when some other rats were fed raw cowpea meal was also studied. In the study on the pattern of hydrogen produced in 24 h in rats fed raw cowpea meal, maximum rate of hydrogen production occurred between 2-8 h. There was considerable variability in the amount of hydrogen produced between rats. After 8 h, hydrogen production declined. When adult rats were fed a basal diet, a diet containing oligosaccharide free (OFR) meal and OFR plus the alcoholic extract; the basal diet produced an average of 1.3 mL H2 over an 8 h period. Diets containing OFR resulted in a three-fold increase in gas production whereas the addition of cowpea alcoholic extract to the OFR resulted in a higher but variable hydrogen production. The oligosaccharides were responsible for approximately 50% of the total gas produced when whole cowpeas were ingested. The highest rate of hydrogen production was found to occur between 2-7 h after feeding.
Learning Contract: New Approach in Assessing and Evaluating Students Co-Curricular Activities
Jumali Selamat,Khaidzir Ismail,Kadaruddin Aiyub,Z.M. Lukman,Kadir Arifin,Roslee Rajikan,Azahan Awang,Mohd. Helmi Abd Rahim,Norfadillah Derahim
The Social Sciences , 2013, DOI: 10.3923/sscience.2012.522.529
Abstract: Co-curricular or extra-curricular activities are an integral part of knowledge in supporting students generic skills development in order to become quality human capital. In general, the co-curricular activities in Higher Education Institutions (HEIs) in Malaysia are of similar fields. However, the institutions have their own way to assess and evaluate the students involvements in these activities. In relation to this, as of 2010/2011 academic session, the Universiti Kebangsaan Malaysia (UKM) has implemented a more flexible approach whereby student are given more freedom at choosing, creating and carrying out the activities based on a learning contract which are drawn out and agreed upon by the students and supervisors prior to the implementation of the said activities. A survey was conducted in order to determine the level of knowledge and understanding among students in relation to the learning contract and their readiness to use the learning contract in their next co-curricular activities. A set of questionnaire was developed and used as a research tool for that purposes. A total of 51 respondents were selected from Training for Trainers (TOT) workshop to participate in this survey. The study found that the level of understanding (mean = 4.06-4.16) and acceptance (mean = 4.02-4.46) on co-curricular activities learning contract among students are excellent. It was also reported that 86% of the students have clear knowledge about the learning contract and its implementation for co-curricular activities. The majority of students stated that they had achieved all the learning contract principles (mean = 3.92-4.25) and learning outcomes (mean = 4.00-4.18) required. In general, this research showed positive results on the implementation of learning contract in co-curricular activities in the UKM. The new approach to implementing and assessing co-curricular activities has already been accepted by most UKM students. Nevertheless, in order to achieve the optimum results, continuous steps should be taken by the respective parties to ensure that the students are well informed about the status of the learning contract.
EFFECT OF IMMUNOMODULATOR DARAPRIM ON POTENTIATION OF VACCINE PROTECTION OF LEISHMANIA MAJOR IN BALB/c MICE
M Keshavarzi,Z.M. Hassan
Iranian Journal Of Allergy, Asthma and Immunology , 2003,
Abstract: In this study, a crude leishmanial antigen, was prepared by sonicating Leishmania major promastigotes used to induce immunity in BALB/c mice against cutaneous leishmaniasis. Correlation between the route of antigen injection and the efficacy of induced protection was examined. To enhance the effectiveness of the antigen, an immunostimulant drug, daraprim (pyrimethamine), was administered simultaneously with the antigen. The experiment demonstrated that simultaneous intraperitoneal injection of the antigen and daraprim resulted in protection from subsequent development of cutaneous lesions. Results of lymphocyte proliferation from mice immunized with either the antigen or antigen-daraprim mixture showed a signficant response to the antigen. The results suggest that daraprim can be used in prophylaxis programs to enhance the effectiveness of vaccines for cutaneous leishmaniasis.
The Effect of the Dexamethsone on Sperm Characteristic and Testosterone Level on Awassi Rams
Z.M.Y. Alkass
Journal of Animal and Veterinary Advances , 2012,
Abstract: The aim of this study, was to determine the effects of dexamethasone on sperm characteristics (volume, mass motility, individual motility, sperm concentration, osmotic pressure) and testosterone activity of serum. In this study, 9 healthy Awassi rams, at the age of 3-5 years and weighing between 50-60 kg, were used. The rams were randomly divided into 2 groups (4 in control group and 5 in treatment group). Dexamethasone was administered intramuscularly at a dose of 4 mg ram 1 once weekly for 3 weeks, semen samples were collected from the rams 2, 24 and 48 h after each injection weekly and examined for sperm characteristics. The results showed that the use of dexamethasone caused significant (p<0.05) increase in semen volume, mass motility and individual sperm motility as compared to the control group. There was no significant correlation (p<0.05) in semen osmotic pressure and sperm concentration. Blood samples were collected from the ram before treatment, after 10 and 25 days of treatment and examined for serum testosterone. The result showed there are significant difference (p<0.05) after 25 days after treatment when compared with the control group.
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