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Search Results: 1 - 10 of 5102 matches for " Noorazuan Md Hashim "
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Analisis tren pemanasan global dan kesannya terhadap aspek dayahuni bandar di Malaysia
Noorazuan Md Hashim
Geografia : Malaysian Journal of Society and Space , 2010,
Abstract: Tujuan penyelidikan ini adalah untuk mengkaji tren pemanasan global di Malaysia dengan menilai perubahan suhu bandar di antara 1970 hingga 2005. Sebanyak lima stesen klimatologi utama Jabatan Meteorologi Malaysia yang terletak di kawasan bandar telah dipilih untuk kajian ini. Beberapa ujian analisis tren termasuk yang berbentuk linear iaitu garis regresi kuasa dua terkecil dan tidak linear iaitu analisis rank Kruskal-Wallis dan juga Ujian Mann-Kendall telah digunakan. Kajian ini telah mengesahkan bahawa i) ujudnya tren perubahan suhu bandar yang signifikan di Semenanjung Malaysia, ii) stesen bandaraya Kuala Lumpur telah dilihat mempunyai perubahan tren yang paling ketara (5.63oC/100tahun) berbanding stesen bandar-bandar lain di Semenanjung Malaysia dan iii) titik perubahan tren berdasarkan analisis Mann-Kendall tidak menunjukkan ianya berlaku semasa kehadiran episod ENSO yang paling kritikal. Justeru, terdapat kebolehpercayaan yang tinggi untuk mengaitkan faktor pembandaran khususnya kesan pulau haba bandar di dalam mengubah tren suhu sekitaran bandar. Peningkatan suhu bandar akibat pemanasan global dan fenomena pulau haba dijangka berupaya membawa implikasi buruk kepada komuniti bandar di Malaysia. Faktor kekasaran bandar dan fenomena pulau haba telah dilihat sebagai faktor dominan di dalam mempengaruhi meteorologi bandar dan seterusnya mengubah keadaan dan kehadiran cuaca ekstrim (banjir kilat dan kemarau) di kawasan bandar.
Penghutanan Bandar Dan Kesihatan Ekosistem Lembangan: Pengalaman Dari St Helens, United Kingdom
Noorazuan Md Hashim
e-BANGI : Journal of Social Sciences and Humanities , 2007,
Abstract: Before the Industrial Revolution in the nineteenth century, St Helens (which is located at the centre of Sankey catchment) was only a small village located at the junction of the boundaries of four townships - Windle, Sutton, Eccleston and Parr. The opening of ship canals as well as the development of the transportation network between Liverpool and Manchester had also increased urban sprawl in the Sankey catchment. Alteration of the river characteristics as a result of urbanisation since 200 years ago has led to several hydrological changes and severe problems in urban catchments, such as water pollution and flash floods. Since the late 1980s, urban renewal programmes have been implemented in the Sankey catchment by various agencies, focusing the urban greening effort on Sankey’s river corridor and also upgrading the derelict and ‘brownfields’ land. It is evident that the Sankey catchment has had differences in hydrological responses over time. The most significant finding is the change of flow characteristics between 1987 and 1996. The 1987-1996 period showed how the succession of urban renewal programmes increased the health of the catchment’s ecosystem. Non-structural measures such as public-private cooperation with public participation in the urban regeneration programmes of the Sankey catchment, especially in the St Helens has proved that it succeeded in improving the urban water quantity characteristics as well as water quality within a decade. The late urbanisation stage in Sankey shows a dominance of reconstruction or redevelopment of the urban area rather than the increase in urban imperviousness.
Kebakaran Hutan Dan Isu Pencemaran Udara Di Malaysia: Kes Jerebu Pada Ogos 2005
Shaharuddin Ahmad,Noorazuan Md Hashim
e-BANGI : Journal of Social Sciences and Humanities , 2006,
Abstract: Air pollution in Malaysia, particularly the haze episode, has a strong relationship with the existence of hot spots observed from satellite image of Sumatra Island, Indonesia. Previous studies have shown that longer periods of dry spell due to El-Ni o phenomenon and the open burning practices of the agriculture areas of Sumatra triggered the haze episode in Malaysia. This article attempts to analyse the haze hazard on human and natural environments in Malaysia by focusing on the haze episode of August 2005. Using the GIS contour technique, the distribution of haze concentration or suspended particulate of the size smaller than 10 microns (PM10) was plotted for Peninsular Malaysia. Analysis of satellite data NOAA-14 from June to August 2005 showed that there were more than 250 hot spots within the burning green coverage areas in East Sumatra. The haze episode on the west coast of Peninsular Malaysia worsened with the weak south-west wind. This preliminary result shows that there is a variation in air pollution concentration trends due to changes in the direction and speed of south-west prevailing wind during the haze episode. It is hoped that this study will provide the basic information for haze episode modelling in future, especially the impact of haze on primary economy sectors of Malaysia.
Groundwater Pollution and Wastewater Management in Derna City, Libya
Jumma Arhouma Jumma,Mohd Ekhwan Toriman,Noorazuan Md Hashim
Environmental Research Journal , 2012, DOI: 10.3923/erj.2012.50.54
Abstract: The study attempts to analyze the groundwater contamination and the health impact resulting from overflowing and leaking of municipal wastewater Derna (North-East Libya). About 3% out of 14798 families living in the study area were used as a study sample and distributed to them questionnaire using the Stratified Relatively Sample and Chi-square was used to analyze the statistical data. The 26 water samples were taken and analyzed chemically and bacterially. The results showed that there are approximately 29% of residents used of septic tanks to disposal their wastewater and about 40.5% of them do not discharge their tanks. And this has led with sewage overflowing from net work to leakage of pollutants to aquifers and has changed the groundwater quality. The bacterial analysis showed the significant increase of E. coli in most of water source, beside the increase of chemical elements that exceeded the maximum limits of standards of drinking water. The problem has caused some diseases such as incidence of intestinal, dermatologist, chest diseases, poisoning, cirrhosis of the liver and kidney failure but about (81%) of these diseases are intestinal diseases.
Fenomena Pulau Haba Bandar dan isu alam sekitar di Bandaraya Kuala Lumpur
Shaharuddin Ahmad,Noorazuan Md. Hashim,Yaakob Mohd Jani
Geografia : Malaysian Journal of Society and Space , 2009,
Abstract: Pulau Haba Bandar (PHB) bukanlah sesuatu fenomena baru yang wujud dan terbentuk di kebanyakan bandar raya besar di dunia hari ini. Keadaan ini dialami juga oleh kebanyakan bandar-bandar besar di Malaysia sejak beberapa dekad di penghujung kurun yang lalu. PHB boleh didefinisikan sebagai pengaruh morfologi bandar terhadap parameter iklim dan cuaca semula jadi yang wujud di persekitaran bandar. Umumnya, peningkatan suhu dapat diperhatikan berlaku di kawasan-kawasan tepubina di dalam bandar berbanding dengan kawasan-kawasan pinggir dan luar bandar. Kebanyakan kajian membahaskan isu alam sekitar pulau haba bandar ini dengan mengaitkan faktor perkembangan bandar dan perindustrian yang begitu pesat sehingga mampu merubah pola dan trend suhu semula jadi di persekitaran bandar. Justeru, berasaskan penyataan ini kajian ini cuba menganalisis aspek pola pulau haba bandar yang berlaku di Kuala Lumpur sejak kebelakangan ini. Dengan menggunakan teknik penderiaan jauh, imej satelit landsat TM dan ETM+ serta GIS digunakan bagi mengesan sebarang perubahan pola suhu yang berlaku di Kuala Lumpur mengikut pola gunatanah yang berbeza. Hasil kajian menunjukkan banyak kawasan yang merekodkan suhu sederhana tinggi manakala pola pulau haba bandar direkodkan di kawasan-kawasan seperti Jinjang-Kepong, Segambut-Sentul dan sedikit di sebelah selatan kawasan kajian. Fenomena pulau haba bandar yang dianggap sebagai isu alam sekitar bandar yang unit ini banyak berkait rapat dengan aspek pemuliharaan dan pemeliharaan alam sekitar bandar. Dapat dikatakan, di samping faktor fizikal, faktor manusia juga amat penting dalam menentukan sejauhmanakah sifat kadar intensiti pulau haba bandar.
Pembangunan Tanah Hutan Dan Fenomena Banjir Kilat: Kes Sungai Lembing, Pahang
Noorazuan Md Hashim,Sulong Muhamad,Kadaruddin Aiyub,Norhayati Yahya
e-BANGI : Journal of Social Sciences and Humanities , 2011,
Abstract: Banjir kilat yang berlaku dalam masa yang singkat (kurang daripada 6 jam) berupaya untuk meningkatkan paras air sungai secara mendadak. Kebanyakan banjir kilat yang berlaku memberi perhatian kepada banjir di kawasan tanah rendah. Bagaimanapun, kajian di Sungai Lembing yang terletak di kawasan tanah tinggi, lebih kurang 45 km dari pinggir pantai Pahang telah dipilih sebagai kawasan kajian. Kajian ini cuba meneliti kesan perubahan guna tanah dan perubahan hidrologi di Lembangan Sg Kuantan bermula pada 1980 sehinggalah pada tahun 2002. Kajian ini mendapati penyahhutanan kawasan tanah tinggi (khususnya pada tahun 1990-2000) telah mengubah entiti kitaran hidrologi lembangan dan juga mengubah aliran rendah sungai berkenaan. Modifikasi alur termasuk pelurusan sungai dan pembinaan tebing konkrit meningkatkan puncak luahan di kawasan tanah rendah terutamanya di Jalan Panching dan Sg Isap, Kuantan. Pengurangan litupan vegetasi di tanah tinggi juga telah mengurangkan masa memuncak hidrograf. Hasil soalselidik dan temubual penduduk dan pengusaha chalet juga telah mengesahkan faktor aktiviti pembalakan haram merupakan faktor pencetus kepada banjir kilat di kawasan tersebut
Red tide detection using remotely sensed data: A case study of Sabah, Malaysia
Asmala Ahmad,Noorazuan Hashim,Laili Nordin
Geografia : Malaysian Journal of Society and Space , 2009,
Abstract: A red tide (RT) is composed of harmful blooms or algae that could cause mass mortalities of marine life and lead to human intoxications or even death. Several red-tide events have been reported in Sabah since 1976. The latest event occurred in February and March 2000 near the coastal waters of Sipitang Bay. This article examines the use of the RT image-processing algorithm through SPOT 4 satellite data application in detecting toxic blooms which occurred on February 2000. Results from the classified image indicate that SPOT 4 is capable of determining a possible red tide event quantitatively and spatially. It is estimated that about 40 km2 of the classified image was affected by RT. The occurrence of red tide was due to an increase of nitrate- and phosphorus- based nutrient loads discharge the aftermath of anthropogenically induced land use and land cover change near Sipitang-Beaufort area. This research suggests further investigations with detailed land cover information to demarcate inorganic sources, as well as a field survey of seawater quality conditions.
Bearing Capacity of Stabilized Peat Column Using Hand Operated Cone Penetrometer
Md. Shahidul Islam,R. Hashim
Journal of Applied Sciences , 2009,
Abstract: The main objective of this study is to stabilize peat soil by deep mixing method using cement, sand, bentonite and calcium chloride as binder and to determine the effect on bearing capacity using proving ring hand operated cone penetrometer. Eight soil-binder columns have been constructed by mixing auger and prebored and premixing method using two different combination of binder. Bearing capacity of the columns has been evaluated by hand operated cone penetrometer after 1, 3, 7, 14 and 28 days of curing time. From the test results it was observed that bearing capacity of peat column increased considerably after stabilization.
Knowledge Management and Usability Model for Knowledge Management System
Nafaizatulnaniah Hashim,Abu Bakar Md Sultan
Computer and Information Science , 2009, DOI: 10.5539/cis.v2n3p166
Abstract: Many studies and works have been done to produce a Knowledge Management System (KMS) in which employees of any organization can access the organization’s sources of information and solutions. However, there is still no standard knowledge measurement and usability model that can assist KMS user to select or evaluate the appropriate KMS. The aim of this paper is to analyze how the ISO Consolidated Usability Model suggested by Abran, Khelifi, Suryn and Seffah can be used in measuring knowledge and evaluating usability for any Knowledge Management System. The methodology used is a user-satisfaction questionnaire developed based on the ISO Consolidated Usability Model.
Removal of Cu(II), Pb(II) and Zn(II) Ions from Aqueous Solutions Using Selected Agricultural Wastes: Adsorption and Characterisation Studies  [PDF]
Siti Najiah Mohd Yusoff, Azlan Kamari, Wiwid Pranata Putra, Che Fauziah Ishak, Azmi Mohamed, Norhayati Hashim, Illyas Md Isa
Journal of Environmental Protection (JEP) , 2014, DOI: 10.4236/jep.2014.54032
Abstract:

The feasibility of durian tree sawdust (DTS), coconut coir (CC) and oil palm empty fruit bunch (EFB) as low-cost biosorbents for the removal of Cu(II), Pb(II) and Zn(II) ions from aqueous solutions was investigated. The effects of solution pH and initial metal concentration on adsorption capacity were examined in batch experiments. The affinity and the adsorption capacity of DTS, CC and EFB were evaluated. The adsorption behaviour of Cu(II), Pb(II) and Zn(II) ions onto DTS, CC and EFB was described using Freundlich and Langmuir isotherm models. The separation factor (RL) analysis suggests that the removal of metal ions onto three agricultural wastes studied was favourable. The maximum adsorption capacities (Q) estimated from the Langmuir isotherm model for Cu(II), Pb(II) and Zn(II) were 18.42, 20.37 and 22.78 mg/g for DTS, 18.38, 37.04 and 24.39 mg/g for CC, and 26.95, 37.59 and 21.19 mg/g for EFB, respectively. The characterisation studies were carried out using Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectrometer (EDX) and Fourier Transform Infrared Spectrometer (FTIR). The surface morphology of the biosorbents changed significantly following interaction with metal ions. The primary adsorption mechanism was complexation between metal ions and binding sites of biosorbents. Both hydroxyl and amine groups are the main binding sites in DTS, CC and EFB.

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