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| 1 | 3-D visualizations of coastal bathymetry by utilization of airborne TOPSAR polarized data显示文摘Multi-frequency C and L bands in the TOPSAR data have been utilized to reconstruct three-dimensional(3-D)bathymetry pattern.The main objective of this study is to utilize fuzzy arithmetic to reduce the errors arising from speckle in synthetic aperture radar(SAR)data when constructing ocean bathymetry from polarized SAR data.In doing so,two 3-D surface models,the Volterra algorithm and a fuzzy B-spline(FBS)algorithm,which construct a global topological structure between the data points,were used to support an approximation to the real surface.Volterra algorithm was used to express the non-linearity of TOPSAR data intensity gradient based on the action balance equation(ABC).In this context,a first-order kernel of Volterra algorithm was used to express ABC equation.The inverse of Volterra algorithm then performed to simulate 2-D current velocities from CVV and LHH band.Furthermore,the 2-D continuity equation then used to estimate the water depth.In order to reconstruct 3-D bathymetry pattern,the FBS has been performed to water depth information which was estimated from 2-D continuity equation.The best reconstruction of coastal bathymetry of the test site in Kuala Terengganu,Malaysia,was obtained with polarized L and C bands SAR acquired with HH and VV polarizations,respectively.With 10 m spatial resolution of TOPSAR data,bias of0.004 m,the standard error mean of 0.023 m,r2 value of 0.95,and 90%confidence intervals in depth determination was obtained with LHH band. | Maged Marghany Arthur P.Cracknell Mazlan Hashim | 2010 | International Journal of Digital Earth2010，3，2： | 5 |
| 2 | Modeling sprawl of unauthorized development using geospatial technology: case study in Kuantan district, Malaysia显示文摘The paper explores a framework combining remote sensing and GIS-cellular automata(CA)concepts aimed at improving the modeling of unauthorized land use sprawl.Remote sensing data have been used in urban modeling and analysis,the use of high-resolution remote sensing data in assessing unauthorized development is quite unexplored.This work has demonstrated systematic combination utilization of geospatial analyses tools to acquire a new level of information to enable urban modeling and sprawl analysis in assisting urban sustainable management.In this study,Kuantan city,Malaysia was selected in simulation of the unauthorized land use with CA concept for a period of 15 years(20002015),with main input time-series land use observation from 1995 to 2005.The 2000 and 2005 land use input was also used as calibrated and test assessment of the simulation.The results show excellent agreement between in-situ changes of the unauthorized land use classes and the corresponding simulated classes within the same periods.In conclusion,CA model can lead to new levels of understanding of how urban areas grow and change as in view of digital earth aspiration. | Mazlan Hashim Norzailawati Mohd Noor Maged Marghany | 2011 | International Journal of Digital Earth2011，4，3： | 2 |
| 3 | 3-D reconstruction of coastal bathymetry from AIRSAR/POLSAR data显示文摘这篇论文为重建介绍一个新方法三维(3D ) 沿海的深测术从在空中的 AIRSAR/POLSAR 合成的孔数据变化。新方法基于在模糊 B 花键和 Volterra 算法之间的集成。Volterra 算法被用来从 AIRSAR/POLSAR 数据模仿海洋表面流。然后,海洋表面流信息用作输入让连续性方程从 AIRSAR/POLSAR 数据估计水深度。这研究证明 3D 海洋深测术能与± 0 .03 m 的根均方误差从 AIRSAR/POLSAR 数据被重建。 | Maged MARGHANY Mazlan HASHIM Arthur P. CRACKNELL | 2009 | Chinese Journal of Oceanology and Limnology2009，27，1： | 1 |
| 4 | Toxicity effects of water extracts of Holothuria atra Jaeger in mice显示文摘Objective:To determine lethal median dose(LD_(50)) and histopalhological toxicity of water extract of Hololhuria atra(H,atra) in mice.Methods:The behavioral changes,mortality and histopathology examination on liver were assessed in mice 14 d after the administration(i.p.) of H.atra water extract.Seven doses 110,20,30,50.100.150 and 200 mg/kg) of H.atra were used.The control group was treated with normal saline,Results:In the acute study in mice,the water extracts of H,atra caused dose-dependent general behavior adverse affects and mortality.The main behavioral sign of toxicity was hypoactivity,noticed immediately after administration of the extract which was more obvious at the higher doses and persisted until death.Mortality increased with increasing doses,the calculated LD_(50)was 41 mg/kg in mice.The liver toxicity was confirmed by histopalhological examination,which indicated the presence of abnormal hepatocytes with a distorted shape and undefined cell lining as well as enlarged nuclei in low doses groups.High doses groups indicated a more prominent distortion of the polyhedral hepatocytes with undefined cell lining,massive cytoplasm,pvknotic.karyorhexis and karyolytie nuclei(necrosis of hepatocytes).Control group showed polyhedral hepatocytes with defined cell lining arranged in cords and normal round nuclei,with granular cytoplasm.Conclusions:Because of the relatively low LD_(50) value in the acute study in mice,it may be concluded that the H.atra water extract is toxic. | Ridzwan Bin Hashim Nurul Alia Azizan Zaitunnatakin Zamli Farah Hanis Zulkipli Nurzafirah Mazlan Osama Yousef Althunibat | 2014 | Asian Pacific Journal of Tropical Biomedicine2014，4，8： | 0 |
| 5 | Mesoscale surface circulation and variability of Southern Indian Ocean derived by combining satellite altimetry and drifter observations显示文摘High resoultion Eulerian mean velocity field has been derived by combining the satellite tracked surface drifter data with satellite altimetry and ocean surface winds. The drifter data used in this study includes Argos and surface drifter data from Global Drifter Program. Maps of Sea Level Anomaly(MSLA) weekly files with a resolution of(1/3)° in both Latitude and Longitude for the period 1993–2012 have been used. The Ekman current is computed using ocean surface mean wind fields from scatterometers onboard ERS 1/2,Quikscat and ASCAT. The derived mean velocity field exhibits the broad flow of Antarctic Circumpolar Current with speeds up to 0.6 m/s.Anomalous field is quite significant in the western part between 20° and 40°E and in the eastern part between 80°E and 100°E with velocity anomaly up to 0.3 m/s. The estimated mean flow pattern well agrees with the dynamic topography derived from in-situ observations. Also,the derived velocity field is consistent with the in-situ ADCP current measurements. Eddy kinetic energy illustrates an increasing trend during 1993–2008 and is in phase coherence with the Southern Annular Mode by three month lag. Periodic modulations are found in the eddy kinetic energy due the low frequency Antarctic Circumpolar Wave propagation. | BENNY N.Peter SHENBAKAVALLI Ranjan MAZLAN Hashim MOHD Nadzri Reba MOHD Razali Mahmud | 2015 | Acta Oceanologica Sinica2015，34，9： | 0 |
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