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GIS-based Frequency Ratio and Logistic Regression Modelling for Landslide Susceptibility Mapping of Debre Sina Area in Central Ethiopia

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Journal of Mountain Science 2015年第6期12卷 1355-1372页

作者： Matebie METEN Netra prakash BHANDARY Ryuichi YATABE Geo-Disaster Research Laboratory Graduate School of Science and Engineering Ehime University

Ethiopia has a mountainous landscape which can be divided into the Northwestern and Southeastern plateaus by the Main Ethiopian Rift and Afar Depression. Debre Sina area is located in Central Ethiopia along the escarpment where landslide problem is frequent due to steep slope, complex geology, rift tectonics, heavy rainfall and seismicity. In order to tackle this problem, preparing a landslide susceptibility map is very important. For this, GISbased frequency ratio(FR) and logistic regression(LR) models have been applied using landslide inventory and the nine landslide factors(i.e. lithology, land use, distance from river & fault, slope, aspect, elevation, curvature and annual rainfall). Database construction, weighting each factor classes or factors, preparing susceptibility map and validation were the major steps to be undertaken. Both models require a rasterized landslide inventory and landslide factor maps. The former was classified into training and validation landslides. Using FR model, weights for each factor classes were calculated and assigned so that all the weighted factor maps can be added to produce a landslide susceptibility map. In the case of LR model, the entire study area is firstly divided into landslide and non-landslide areas using the training landslides. Then, these areas are changed into landslide and non-landslide points so as to extract the FR maps of the nine landslide factors. Then a linear relationship is established between training landslides and landslide factors in SPSS. Based on this relationship, the final landslide susceptibility map is prepared using LR equation. The success-rate and prediction-rate of FR model were 74.8% and 73.5%, while in case of LR model these were 75.7% and 74.5% respectively. A close similarity in the prediction and validation rates showed that the model is acceptable. Accuracy of LR model is slightly better in predicting the landslide susceptibility of the area compared to FR model.

关键词： Landslide susceptibility GIS Frequency Ratio Logistic Regression Debre Sina Ethiopia

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On Almost Armendariz Ring

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Algebra Colloquium 2020年第2期27卷 199-212页

作者： Om prakash Sushma Singh K.P.Shum Department of Mathematics Indian Institute of Technology Patna PatnaBihar 801106India Department of Mathematics John Fulton Center The Chinese University of Hong KongShatinN.T.Hong KongChina

In this paper,we introduce the notion of an almost Armendariz ring,which is a generalization of an Armendariz ring,and discuss some of its *** has been found that every almost Armendariz ring is weak Armendariz but the converse is not *** prove that a ring R is almost Armendariz if and only if R[x]is almost *** is also shown th at if R/I is an almost Armendariz ring and I is a semicommutative ideal,then H is an almost Armendariz ***,the class of minimal non-commutative almost Armendariz rings is completely determined,up to isomorphism(minimal means having smallest cardinality).

关键词： Armendariz ring almost Armendariz ring weak Armendariz ring lower nil radical reduced ring semicommutative ring

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Hierarchical Data Aggregation with Data Offloading Scheme for Fog Enabled IoT Environment

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Computer Systems Science & Engineering 2023年第3期44卷 2033-2047页

作者： P.Nalayini R.Arun prakash Department of Computer Science and Engineering Kings College of EngineeringPunalkulam613303TamilnaduIndia Department of Computer Science and Engineering University College of EngineeringAriyalur621704TamilnaduIndia

Fog computing is a promising technology that has been emerged to handle the growth of smart devices as well as the popularity of latency-sensitive and location-awareness Internet of Things(IoT)*** the emergence of IoT-based services,the industry of internet-based devices has *** number of these devices has raised from millions to billions,and it is expected to increase further in the near ***,additional challenges will be added to the traditional centralized cloud-based architecture as it will not be able to handle that growth and to support all connected devices in real-time without affecting the user *** data aggregation models for Fog enabled IoT environ-ments possess high computational complexity and communication ***-fore,in order to resolve the issues and improve the lifetime of the network,this study develops an effective hierarchical data aggregation with chaotic barnacles mating optimizer(HDAG-CBMO)*** HDAG-CBMO technique derives afitness function from many relational matrices,like residual energy,average distance to neighbors,and centroid degree of target ***,a chaotic theory based population initialization technique is derived for the optimal initial position of ***,a learning based data offloading method has been developed for reducing the response time to IoT user requests.A wide range of simulation analyses demonstrated that the HDAG-CBMO technique has resulted in balanced energy utilization and prolonged lifetime of the Fog assisted IoT networks.

关键词： Internet of things fog computing barnacles mating optimizer data offloading data aggregation

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Corrosion Inhibition of Leucaena Leucocephala Pod on Mild Steel in Sulphuric Acid Solution

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Acta Metallurgica Sinica(English Letters) 2013年第4期26卷 416-424页

作者： P.Muthukrishnan B.Jeyaprabha P.prakash Department of Chemistry Thiagarajar College Department of Civil Engineering Fatima Michael College of Engineering & Technology

The corrosion of the mild steel in i mol/L H2SO4 was investigated using Leucaena leucocephala pod extract （LLPE） as corrosion inhibitor by weight loss and electrochemical techniques. Inhibition efficiency of 95% was achieved with 500×10^-6 of LLPE at 308 K. The polarization studies showed that LLPE acted as mixed type inhibitor. The adsorption of the studied inhibitor on mild steel obeyed Langmuir adsorption isotherm. Protective film formation against acid attack was confirmed by FT-IR, XRD and SEM techniques.

关键词： Mild steel Polarization SEM Acid corrosion XRD

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An improvised in vitro vegetative propagation technique for Bambusa tulda： influence of season, sterilization and hormones

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Journal of Forestry Research 2018年第4期29卷 1059-1064页

作者： Deepti Bhadrawale Jay prakash Mishra Yogeshwar Mishra Tropical Forest Research Institute P.O.-R.F.R.C. Mandla Road Jabalpur Madhya Pradesh 482021 India

Season and concentration of sterilizing agents play a significant role for establishment of aseptic in vitro shoot cultures and sprouting of nodal explants from field growing culms of bamboo species. In the present investigation the nodal segment explants of Bambusa tulda Roxb collected in different seasons and treated with various concentrations of HgC12 showed significant variation in aseptic culture establishment and bud break. The rainy season （July-August） recorded with highest of 78% aseptic culture establishment whereas autumn recorded with lowest 46%. Summer and winter seasons emerged to be the best period, registering 〉 60% in vitro bud break. On the other hand, the autumn season had the lowest value for bud break, i.e. 42%. Among different doses of sterilizing agent tried, HgC12 0.1% found to be suitable for maximum aseptic culture establishment （66%） as well as bud break （59%）. However, among the interactions, summer season and the dose of 0.1% HgC12 exhibited maximum of 73% response for both aseptic culture establishment and bud break. MS medium （liquid） enriched with 5.0 μM BA ＋5.0 μM Kn [Kinetin （N6-Furfuryladenine）] with additional supplementation of 100 μM glutamine ＋ 0.1 μM IAA supported a maximum in vitro shoot multiplication of 4.75 fold. The proliferated shoots were successfully rooted on MS medium （liquid） supplemented 40 μM coumarin. The plantlets transferred to the polythene bags showed 98% survival.

关键词： Aseptic culture Bambusa tulda Roxb Bud sprouting Season

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Towards the development of cavitation technology for upgrading bitumen： Viscosity change and chemical cavitation yield measurements

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Petroleum Science 2017年第2期14卷 404-411页

作者： Deepak M. Kirpalani Dipti prakash Mohapatra Energy Mining and Environment Portfolio National Research Council of Canada 1200 Montreal Road Ottawa ON K1A 0R6 Canada

Among the different methods used for reducing viscosity of bitumen,acoustic cavitation during sonication is well *** chemical methods were used to detect the production of reactive species such as hydroxyl radicals and hydrogen peroxide during acoustic cavitation ***,quantification of cavitation yield in sonochemical systems is generally limited to low frequencies and has not been applied to bitumen *** empirical determination of the cavitation yield in midto high-frequency range（378,574,850,992,and1173 k Hz）was carried out by measuring the amount of iodine liberated from the oxidation of potassium iodide（KI）.Further,cavitation yield and the effects of different sonic operating conditions such as power input（16.67%–83.33%）and solute concentration on cavitation yield were carried out in KI solution and sodium carboxymethyl cellulose–water mixture to obtain benchmark changes in rheology and chemistry using these two model *** findings were then applied to bitumen upgrading through *** this study,it was found that the chemical cavitation yield peaked with a sonication frequency of 574 k *** was also found that cavitation yield and viscosity change were correlated directly in bitumen and a 38%lower bitumen viscosity could be obtained by acoustic cavitation.

关键词： Bitumen Cavitation yield CMC-water KI solution Viscosity correlation

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Petrogenesis of the Borjuri diorite pluton in the Mikir Massif of Northeast India:implications for post-collisional intermediate magmatism during the Pan-African orogeny

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Acta Geochimica 2023年第4期42卷 747-764页

作者： Tribujjal prakash Ashima Saikia Pallabi Basumatary Bibhuti Gogoi Department of Geology Cotton UniversityGuwahatiAssam 781001India Department of Geology University of DelhiDelhi 110007India

The Assam-Meghalaya Gneissic Complex(AMGC)of northeast India contains numerous Pan-African granitic bodies that have been attributed to post-collisional rift-related *** present study is concerned with the first appraisal of intermediate magmatism(diorite,monzonite,and monzodiorite)found in the Borjuri Pluton of Mikir Massif,which is the eastern extension of *** diorites are strongly metaluminous and exhibit enriched LREE([La/Yb]N=1.63–7.37)with respect to HREE([Gd/Yb]N=1.95–2.27).The studied rocks do not show any mineralogical or textural indication of *** discrimination diagrams indicate that these rocks originated in a within-plate tectonic *** lower Mg#(33.49–38.69),low Cr(below detection limit),and Ni(27–41 ppm)contents along with elemental ratios such as Rb/Sr(0.32–0.95),La/Nb(0.49–4.21),and Nb/Ce(0.11–0.64)suggest a crustal source for the *** diagrams coupled with elemental ratios suggest that these rocks originated due to partial melting of mafic components in the crust with possible contribution from mantle *** P–T conditions of diorite emplacement(7.4 kbar,688℃)were calculated using the amphibole-plagioclase *** and geochronological data of the Pan-African felsic plutons reported from the AMGC indicate that these rocks were emplaced in a post-collisional extensional *** Borjuri Pluton is in close proximity with the Kathalguri Pluton,which has been reported as a product of PanAfrican *** view of the numerous extensional Pan-African felsic magmatism reported from the AMGC and based on the close vicinity of the Borjuri diorites with the Kathalguri granites,we speculate that the Borjuri diorites are products of the Pan-African post-collisional magmatism.

关键词： Granites Rift-related magmatism Intermediate magmatism Within-plate tectonic setting Kathalguri Pluton Assam-Meghalaya Gneissic Complex

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Trace elemental signatures and mineral chemistry of clays associated with the alteration halos of the Paleoproterozoic U mineralization in Bijawars of the Sonrai Basin,Central India

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Acta Geochimica 2020年第3期39卷 365-386页

作者： Surendra Kumar Jha Rashmi Sharma Jaya prakash Shrivastava University of Delhi DelhiIndia Department of Cement Technology A.K.S.UniversitySatnaMPIndia

Paleoproterozoic Bijawars of the Sonrai basin consists of(a) Sonrai(mostly carbonate carbonaceous shale and phosphatic breccia) and(b) Solda Formations(commonly chloritic and ferruginous shale) with well-developed clay-organo-rich facies,often marked with hydrothermal *** studies revealed abundance order of kaolinite> chlorite> illite> smectite;and kaolinite> illite> chlorite in clay(0.2-2.0 μm) fractions separated from the Sonrai and Solda Formations,*** understand atomic substitutions and trace elemental concentrations,clay minerals were analyzed by fusion ICPMS and *** normalized data plots show U,Th,Rb,Ba,Pb Sr,and large-ion lithophiles enrichment,whereas,Bandai sandstone and Rohini carbonate clays show HREE enrichment with asymmetrical patterns,similar to those reported from the well-established McArthur River,Cigar Lake,and Sue UTUD of *** Rohni carbonate,chondrite-normalized REE data plots revealed M shape REE patterns,ascribed to Gd-Tb-Dy-Ho tetrad effect and anomalous Y,Zr,and Hf *** to HREE incorporation in the clay inter-layers,linear and flattened REE trends were *** REE patterns associated with the highly altered chlorite and illite represent negative Eu anomaly related to the dilational nature of the uraninite structure and is suggestive of anoxic conditions.

关键词： Bijawars Sonrai basin Clays REE patterns Uranium mineralization

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Kinetics of solid-state reduction of chromite overburden

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International Journal of Minerals,Metallurgy and Materials 2023年第12期30卷 2347-2355页

作者： Saida Shaik Zhiyuan Chen Preeti prakash Sahoo Chenna Rao Borra Metallurgical and Materials Engineering Department Indian Institute of Technology KharagpurKharagpurWest Bengal 721302India VITO-Flemish Institute for Technological Research Boeretang 200B-2400 MolBelgium Research and Development Division Tata Steel Ltd.Jamshedpur 831001India

The demand for alternative low-grade iron ores is on the rise due to the rapid depletion of high-grade natural iron ore resources and the increased need for steel usage in daily ***,the use of low-grade iron ores is a constant clinical task for industry *** smelting of low-grade ores consumes a substantial amount of energy due to the large volume of slag *** condition can be avoided by direct reduction followed by magnetic separation(to separate the high amount of gangue or refractory and metal parts)and *** overburden(COB)is a mine waste generated in chromite ore processing,and it mainly consists of iron,chromium,and nickel(<1wt%).In the present work,the isothermal and non-isothermal kinetics of the solid-state reduction of self-reduced pellets prepared using low-grade iron ore(COB)were thoroughly investigated via thermal *** results showed that the reduction of pellets followed a firstorder autocatalytic reaction control mechanism in the temperature range of 900-1100℃.The autocatalytic nature of the reduction reaction was due to the presence of nickel in the *** apparent activation energy obtained from the kinetics results showed that the solid-state reactions between COB and carbon were the rate-determining step in iron oxide reduction.

关键词： chromite overburden solid-state reduction kinetics autocatalytic reaction

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Antidiabetic,hypolipidemic and histopathological analysis of Dillenia indica (L.) leaves extract on alloxan induced diabetic rats

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Asian Pacific Journal of Tropical Medicine 2011年第5期4卷 347-352页

作者： Sunil Kumar Vipin Kumar Om prakash Institute of Pharmaceutical Sciences Kurukshetra UniversityHaryanaIndia

Objective:To investigate antidiabetic,hypolipidemic histopathological analysis of Dillenia indica(***) methanolic leaves(DIME) extract in alloxan induced diabetic rat by administering oral doses(250 and 500 mg/kg body weight).Methods:Blood glucose levels were measured using blood glucose test strips with elegance glucometer on weekly intervals till the end of study(i.e.3 weeks).Other parameters *** profile,renal profile and total lipid levels were determined in normal and alloxan induced diabetic rats after oral administration of the extract for 21 *** changes in diabetic rat organs(pancreas,liver and kidney) were also observed after extract treatment Results:Daily oral administration DIME(250 and 500 mg/kg body weight) and glibenclamide(10 mg/kg) showed beneficial effects on blood glucose level (P<0.001) as well as improving kidney,liver functions and hyperlipidaemia due to diabetes. The extract treatment also showed to enhanced serum insulin level and body weight of diabetic rats as compared to diabetic control ***,the extract has a favorable effect on the histopathological changes of the pancreas,liver and kidney in alloxan induced diabetes. Conclusions:*** possess antidiabetic property as well improve body weight,liver profile, renal profile and total lipid *** has also favorable effect to inhibit the histopathological changes of the pancreas and kidney in alloxan induced diabetes.

关键词： Antidiabetic Dillenia indica Hypolipidemic Rat Serum cholesterol

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