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Journals
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Srinivasan, V.
- PC Modeling and Simulation of Car Suspension System
Abstract Views :555 |
PDF Views:0
Authors
Affiliations
1 Department of Automobile Engineering, Bharath University, Chennai-73
2 Department of Electronics, Bharath University, Chennai-73
3 Department of Computer Science Engineering, Bharath University, Chennai-73
1 Department of Automobile Engineering, Bharath University, Chennai-73
2 Department of Electronics, Bharath University, Chennai-73
3 Department of Computer Science Engineering, Bharath University, Chennai-73
Source
Indian Journal of Science and Technology, Vol 6, No S5 (2013), Pagination: 4629-4632Abstract
The car suspension system of this model contains two parts. The first part deals with the formulation of a mathematical model for a conventional full car passive suspension system. Typically, the mathematical modeling is done on the basis of mechanical network analysis. The second part deals with simulation of the mathematical model of the suspension system. Simulation is carried out using MATLAB. Program was carried out for MATLAB and the simulation results were obtained in the form of graphical plots.Keywords
Passive Suspension Sprung Mass, Unsprung Mass, Dampers, SpringFull Text
References
- Ogata K (2001). Modern control engineering, 3rd Edn., Prentice-Hall of India.
- Cebon D (1993). Interaction between heavy vehicles and roads, 39th Buckendale Lecture, 1st Edn., SAE Interenational.
- Smith M C, and Wang F (2002). Controller parameterization for disturbance response decoupling: application to vehicle active suspension control, IEEE Transactions on Control Systems Technology, vol 10(3), 393–407.
- Williams R A (1997). Automotive active suspensions, Part-1: basic principles, Proceedings of the Institution of Mechanical Engineers Conference, vol 211, No. 6, 415–426.
- Crouse W H, and Anglin D L (2002). Automotive Mechanics, 9th Edn., Tata McGraw Hill Edition.
- Analysis of Static and Dynamic Load on Hydrostatic Bearing with Variable Viscosity and Pressure
Abstract Views :483 |
PDF Views:0
Authors
Source
Indian Journal of Science and Technology, Vol 6, No S6 (2013), Pagination: 4777-4782Abstract
Hydrostatic bearing finds wide application in machine tools with various technologies because of their high stiffness and damping characteristic. The environmental conditions, such as low and/or high temperatures, dust and dirt, moisture and unusual mounting conditions, can also affect a bearing's performance adversely. Therefore, both mechanical and environmental factors may affect the choice of a bearing and its performance. For high speed applications it is necessary to have design data including the effect of rotational lubricant inertia.The objective of the study is to design a hydrostatic bearing with following properties such as high stiffness, damping characteristic and lubrication inertia. In the present study Reynolds equation is used and boundary conditions are changed for various parameters such as temperature distribution, viscosity variation and radial load. The simulated results were analyzed in detail and found that increasing the viscosity of hydrostatic thrust bearing under specific conditions when both surfaces are rotated, the wear and tear are minimized and life time has been increased. This will be of great use in high speed applications.Keywords
Hydrostatic Bearing, Viscosity, Pressure, Temperature, Reynolds Equation, LubricantFull Text
- Analysis of Dynamic Load Characteristics on Hydrostatic Bearing with Variable Viscosity and Temperature using Simulation Technique
Abstract Views :734 |
PDF Views:0
Rotation of the bearing causes the lubricant to have a velocity component in an axial direction towards the rotating surface as it spirals radically outwards between the bearing surfaces. This results in an increase in the pumping losses and a decrease in the load capacity of the bearing. A further loss in the performance of the bearing is found when the radial inertia term in addition to the rotational inertia term is included in the analysis. Application of hydrostatic bearings is limited by friction and therewith by velocity. Typical characteristics of the hydrostatic system (load, stiffness, flow) are calculated without a velocity dependency. The geometry of the hydrostatic bearing pockets and their restrictors are optimized by using time continuous pressure distribution at the bearing pocket, laminar flow behavior as well as constant velocity of the bearing. The dynamic effects of the flow at high velocities are not considered.
The proposed design has higher load capacity, higher stiffness and damping coefficients, lower flow rate and uniform pressure distribution by using the HTGA/Gray method. A Hydrostatic bearings test bench has been designed, built and set-up. The test bench has been monitored with pressure, flow-rate, temperature, displacement and force sensors.
Authors
Source
Indian Journal of Science and Technology, Vol 6, No S6 (2013), Pagination: 4797-4803Abstract
The paper reflects the common design and calculation methods and shows their limitations in regard to the calculation of hydrostatic bearings at high velocities. It analyzes the results of complex dynamic flow simulations of hydrostatic bearings and presents a new design and optimization concept of hydrostatic bearings. This concept analyses the oil flow at high bearing velocities and it optimizes the bearing geometry, the restrictor geometry as well as the geometry of the main mechanical components. Expressions are obtained for the temperature distribution in an externally pressurized thrust bearing for the condition when one bearing surface is rotated. The influence of centripetal acceleration and the combined effect of rotational and radial inertia terms are included in the analysis.Rotation of the bearing causes the lubricant to have a velocity component in an axial direction towards the rotating surface as it spirals radically outwards between the bearing surfaces. This results in an increase in the pumping losses and a decrease in the load capacity of the bearing. A further loss in the performance of the bearing is found when the radial inertia term in addition to the rotational inertia term is included in the analysis. Application of hydrostatic bearings is limited by friction and therewith by velocity. Typical characteristics of the hydrostatic system (load, stiffness, flow) are calculated without a velocity dependency. The geometry of the hydrostatic bearing pockets and their restrictors are optimized by using time continuous pressure distribution at the bearing pocket, laminar flow behavior as well as constant velocity of the bearing. The dynamic effects of the flow at high velocities are not considered.
The proposed design has higher load capacity, higher stiffness and damping coefficients, lower flow rate and uniform pressure distribution by using the HTGA/Gray method. A Hydrostatic bearings test bench has been designed, built and set-up. The test bench has been monitored with pressure, flow-rate, temperature, displacement and force sensors.
Keywords
Hydrostatic Bearing, Pressure, Temperature, Viscosity, Load Capacity, DampingFull Text
- A Two Stage DC-DC Converter with Isolation for Renewable Energy Applications
Abstract Views :450 |
PDF Views:0
Authors
Source
Indian Journal of Science and Technology, Vol 6, No S6 (2013), Pagination: 4824-4830Abstract
In this work, the design and development of a DC-DC Converter using a two stage buck-boost operation is discussed. This converter is suitable for low power application such as a matrix LED lighting system. The advantage of this converter is that instead of using two controlled switches as in case of a conventional converter, this circuit uses one MOSFET as a switch. The circuit uses two inductors and two capacitors as energy transferring elements that are able to provide a good quality, high efficiency power supply to the load. The design of TSBB converter is analyzed with closed loop control using a PI controller circuit. Even with smaller values of inductor and capacitor a highly efficient power supply can be made. The main feature of this circuit compared to the other circuits proposed previously is that have a galvanic isolation between the load and the source is provided. Thus, by a suitable controller and galvanic isolation, the ripple magnitude in the output is reduced considerably. A simulation model of the TSBB converter with results is presented.Keywords
Two Stage Buck-boost (TSBB), LED Matrix, Duty Cycle (α), Galvanic Isolation, Discontinuous Conduction Mode (DCM), Continuous Conduction Mode (CCM)Full Text
- A Possible Carbonatite Occurrence Near Hogenakal, Tamil Nadu South India
Abstract Views :183 |
PDF Views:149
Authors
Affiliations
1 Tamil Nadu Geology Branch, Madras, IN
1 Tamil Nadu Geology Branch, Madras, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 14, No 3 (1973), Pagination: 313-316Abstract
No Abstract.Full Text
- Geological Structures in Attur Valley, Tamilnadu, Based on Photo-Interpretation
Abstract Views :186 |
PDF Views:149
Authors
Affiliations
1 Tamil Nadu Geology Branch, Madras, IN
1 Tamil Nadu Geology Branch, Madras, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 15, No 1 (1974), Pagination: 89-93Abstract
No Abstract.Full Text
- The Carbonatite of Hogenakal, Tamil Nadu, South India
Abstract Views :183 |
PDF Views:2
Authors
Affiliations
1 Department of Geology, Tamil Nadu State Geology Branch, Madras 600032, IN
1 Department of Geology, Tamil Nadu State Geology Branch, Madras 600032, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 18, No 11 (1977), Pagination: 598-604Abstract
The carbonatite complex (pyroxenite-syenite-carbonatite) of Hogenakal area of Tamil Nadu and adjoining parts of Karnataka were emplaced along NNE - ssw fracture zones within the Precambrian gneissic complex. The carbonatite is Sovite in composition and its characteristics are (1) occurrence as fracture filling dykes, (2) presence of agglomeratic and flow structures and (3) absence of dolomitic carbonatite or beforsite, true fenite and major rare earth mineralization. The carbonatite of Hogenakal belongs to the high temperature and deep level intrusion of sub-volcanic origin. It has certain similarity with that of Strangways Range area of Central Australia and differs in certain respects from other carbonatite occurrences of Tamil Nadu.
- Investigation of Enhanced Oil Recovery (EOR) Surfactants on Clay Mixed Sandstone Reservoirs for Adsorption
Abstract Views :219 |
PDF Views:0
Authors
Affiliations
1 Department of Petroleum Engineering, AMET University, Chennai, 603112, IN
1 Department of Petroleum Engineering, AMET University, Chennai, 603112, IN
Source
Indian Journal of Science and Technology, Vol 8, No 14 (2015), Pagination:Abstract
Adsorption of surfactants on sandstones leads to reduce in recovery efficiency of oil. This is caused mainly because of clay presence. Most of the water flooding projects has been stopped, when clay is present. Even surfactants are adsorbed due to clay. The aim of this research work is to reduce the adsorption of surfactants for different pH clay mixed sandstones. Three clay sandstones as crushed samples with different pH levels have been tested to observe the adsorption of Anionic surfactants Sodium Dodecyl Sulphonate (SDS) through bottle test. There was no significant adsorption found on pH 3 and above. Adsorption of SDS on pH 2 clay sandstone has reduced due to increase in alkalinity by application of Sodium Carbonate (Na2CO3).Keywords
Adsorption, Clay Sandstone, Surfactants, SDS, WettabilityFull Text
- Melatonin, Insomnia and the Use of Melatonergic Drugs
Abstract Views :217 |
PDF Views:0
Authors
Affiliations
1 Sri Sathya Sai Medical Educational and Research Foundation, Prasanthi Nilayam, 40-Kovai Thirunagar, Coimbatore-641014, Tamilnadu, IN
2 Department of Physiology, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, MY
3 Department of Psychiatry, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, MY
4 Department of Obstetrics and Gynecology, The Hebrew University, Hadassah Medical Center, Jerusalem, 91120, IL
1 Sri Sathya Sai Medical Educational and Research Foundation, Prasanthi Nilayam, 40-Kovai Thirunagar, Coimbatore-641014, Tamilnadu, IN
2 Department of Physiology, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, MY
3 Department of Psychiatry, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, MY
4 Department of Obstetrics and Gynecology, The Hebrew University, Hadassah Medical Center, Jerusalem, 91120, IL
Source
Journal of Endocrinology and Reproduction, Vol 16, No 1 (2012), Pagination: 15-24Abstract
Due to inconsistency among reports on the therapeutic efficacy of melatonin, attention has been focused on the development of more potent melatonin analogues with prolonged effects. Melatonergic drugs, ramelteon and agomelatine have been effective in treating either sleep disorders or sleep disturbances associated with depressive disorders. MT1 and MT2 melatonergic receptor agonist, ramelteon, was found effective in increasing total sleep time and sleep efficiency, and in reducing sleep latency in patients with insomnia. No reduction in its efficacy was found even after 6-12 months of continuous use. The mechanism of sleep promoting action of ramelteon is entirely different from that of conventional hypnotics that are in use today. Ramelteon's use is not associated with any adverse effects even after six months to one year after its continuous usage. Another melatonergic drug, agomelatine, has also been found effective in improving sleep efficiency and quality, and this action of agomelatine is suggested to be one of the major mechanism by which agomelatine ameliorates depressive symptoms in patients with major depressive disorders and bipolar disorders.Keywords
Melatonin, Ramelteon, Insomnia, Agomelatine, Depressive Disorder.- Geophysical and Seismological Investigations for the Hidden Oldham Fault in the Shillong Plateau and Assam Valley of Northeast India
Abstract Views :192 |
PDF Views:132
Authors
Affiliations
1 Geological Survey of India, Op TNPK, Chennai, IN
2 Geological Survey of India, Kolkata, IN
1 Geological Survey of India, Op TNPK, Chennai, IN
2 Geological Survey of India, Kolkata, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 70, No 1 (2007), Pagination: 172-172Abstract
No Abstract.Full Text
- Regional Structural Configuration and Seismic Pattern of 'Belt of Schuppen' in Northeast India
Abstract Views :169 |
PDF Views:3
Authors
Affiliations
1 Geological Survey of India, Op TNPK, Guindy, Chennai - 600 032, IN
1 Geological Survey of India, Op TNPK, Guindy, Chennai - 600 032, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 70, No 5 (2007), Pagination: 801-814Abstract
Using aerial photographs followed by extensive field checks, a Photo-Geological map for the entire 'Belt of Schuppen' of northeast India has been prepared. The 20 to 30 km wide exposed part of 'Belt of Schuppen' comprises two major thrusts (Haflong-Naga thrust, Disang thrust) and three minor Sub-Thrusts. The Haflong-Naga thrust (frontal thrust of 'Belt of Schuppen') extends NE-SW over a length of 410 km along the break in slope separating the alluvial plain in the west from the ridges of Neogene sedimentary rocks in the east. In the SW at Miyungkhor in the left bank of Jatinga River, it is terminated by Dauki fault. In the NE near Digboi, it is concealed below the alluvium. The Disang thrust (rear thrust of 'Belt of Schuppen') extends NE-SW over a length of 480 km and it defines the eastern margin of Neogene basin. In the SW near Wadrengdisa, it branches out from Haflong-Naga thrust and in the NE at Bulbulia in the right bank of Noa Dihing River, it is terminated by Mishmi thrust, which extends into Myanmar as 'Sagaing fault'. The major thrusts and Sub-Thrusts of belt 'Belt of Schuppen' dtp generally towards SE. Thus the 'Belt of Schuppen' extends between Dauki fault in the SW and Mishmi thrust in the NE over a length of about 500 km. When the SW end of 'Belt of Schuppen' moved upwards and towards east along the Dauki fault, the NE end moved downwards and towards west along the Mishmi thrust, causing it's 'S' shaped bending.The southern part of 'Belt of Schuppen' extends along the sheared western limb of southerly plunging Kohima synform and it is seismically active. The northern truncated end at Mishmi trust is also seismically active. There is a pronounced seismic gap in the middle part of 'Belt of Schuppen'. The epicenter plots of major earthquakes of Richter magnitude ≥7 in this region reveal that the rupturing at depth which caused these earthquakes are aligned along distinct NE-SW trending parallel zones, perpendicular to the regional compression in NW-SE direction.
Keywords
'Belt of Schuppen', Haflong-Naga Thrust, Disang Thrust, Dauki Fault, Mishmi Thrust, Kohima Synform, Sagaing Fault, Seismic Gap, Northeastern Indla.- Hourglass Structure: an Evidence of Buckle Folding
Abstract Views :169 |
PDF Views:140
Authors
Affiliations
1 Geological Survey of India. Op: TNPK, Chennai, IN
2 Earth Sciences, IIT Roorkee, IN
1 Geological Survey of India. Op: TNPK, Chennai, IN
2 Earth Sciences, IIT Roorkee, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 67, No Spl Iss 5 (2006), Pagination: 696-697Abstract
No Abstract.Full Text
- The Dauki Fault in Northeast India: through Remote Sensing
Abstract Views :223 |
PDF Views:3
Authors
Affiliations
1 Geological Survey of India, Tripura-Mizoram Division, B.K. Road, Banamalipur, Agartala - 799 001, IN
1 Geological Survey of India, Tripura-Mizoram Division, B.K. Road, Banamalipur, Agartala - 799 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 66, No 4 (2005), Pagination: 413-426Abstract
Dauki fault extends roughly E-W along the southern margin of Meghalaya plateau. Using remote sensing techniques followed by critical field checks, the author traced Dauki fault from Dauki towards east upto Leike over a length of 170 km. This fault is a single fault dipping towards south (normal fault). In the footwall block close to the fault trace, the older rocks such as Disang shale (Eocene) and the massive Thick-Bedded sandstories (Barail Group of Eocene- Oligocene) are exposed. In the hanging wall block close to the fault trace, the alternating sandstone shale sequence ('ribbed sequence', a regional marker) belonging to the upper part of Palaeogene is exposed. In the eastern part of hanging wall block, the regional marker abuts against the folded sedimentaries of Surma basin of Neogene along a tectonic contact, which is also co-folded. The N-S trending axial surfaces of folds in Surma basin bend towards NE to ENE while approaching the trace of Dauki fault, indicating dextral strike slip movement along Dauki fault.This inference is further supported by the outcrop pattern of Haflong thrust in the footwall block with the concavity facing west. This thrust belonging to the 'Belt of Schuppen' abruptly terminates against the younger Dauki fault.In the western part of hanging wall block of Dauki fault, the same marker horizon abuts against the non-folded, undeformed, near horizontal sedimentaries of Sylhet trough of Neogene. It is proposed that the Sylhet sediments were deposited in a pull-apart basin in the releasing bend of Dauki fault during the dextral strike slip movement. Thus the net slip for Dauki fault involves a vertical component and a dextral strike slip component (oblique-slip fault). sonapur 'landslide zone is located very dose to this fault and the recurring landslide indicates that this fault is still active. The densely populated areas, such as Dacca and Silchar, are located on the loose alluvial sediments not far away from the active Dauki fault.
Keywords
Dauki Fault, Haflong Thrust, Surma Basin, Sylhet Trough, Meghalaya Plateau.- Stratigraphy and Structure of Siwaliks in Arunachal Pradesh: a Reappraisal through Remote Sensing Techniques
Abstract Views :171 |
PDF Views:2
Authors
Affiliations
1 Geological Survey of India, Tripura-Mizoram Division, B.K. Road, Banamalipur, Agartala - 799 001, IN
1 Geological Survey of India, Tripura-Mizoram Division, B.K. Road, Banamalipur, Agartala - 799 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 62, No 2 (2003), Pagination: 139-151Abstract
The Siwalik belt in Arunachal Pradesh, which extends from Bhutan border in the west to Pasighat in the east over a distance of about 350 km, was studied in detail using recent aerial photos and IRS-1C LISS 3 digital data products for understanding its stratigraphy and structure. Critical field checks were subsequently carried out.The Siwalik belt, which is roughly 20 km wide, is exposed between Brahmaputra alluvium in the south and pre-Tertiary rocks in the north. Main Boundary Fault (MBF) defines the northern limit of Siwalik sedimentaries.
Two major en echelon E-W to ENE-WSW trending, northerly dipping faults (Fault-1, 2) have divided the Siwalik belt into three tectonic blocks (Tectonic Block-1, 2 and 3). Fault-1 branches out from MBF in the west and extends through Siwalik belt to Subansiri River in the middle part of the study area. Here Fault-2 in the north, branches out from MBF and extends through Siwalik belt to Nari in the eastern part.
The poorly cemented pebble/cobble beds and soft, immature sandstones/sand rocks of Tectonic Block-1 (south of Fault-1) are considered to represent the youngest part of Siwalik Group and they were folded to NE plunging (5° to 10°) open, mega anticline. The well-bedded sandstones of Tectonic BJock-2 (north of Fault-1 or south of Fault-2) and thickly bedded sandstones with huge pebble bed horizons of Tectonic Block-3 (north of Fault-2) reveal gentle to moderate (10° to 30°) homoclinal dip towards north to NW.
Two contradicting models are proposed to explain the tectonic setup of Siwalik belt. In the first model, MBF, which is dipping at -60° due north at the surface level, is considered to become gentle at depth and towards north. Fault-1 and Fault-2 are considered as diverging splay thrusts from the main thrust, MBF. In the second model, it is proposed that MBF, Fault-1 and Fault-2 extend downwards as near-vertical faults, even though they reveal moderate northerly dip at the surface level. This second model, which involves reactivation of basement weaker zones and differential vertical movement in a non-compressive environment, explains in a convincing way the overall tectonic setup of Siwalik belt in Arunachal Pradesh.
Keywords
Remote Sensing, Stratigraphy, Structure, Siwaliks, Arunachal Himalaya.- Stratigraphy, and Structure of Siwaliks in Arunachal Pradesh
Abstract Views :189 |
PDF Views:135
Authors
Affiliations
1 708, Maitri Apartments, 255, NSC Bose Road, Kolkata - 700 047, IN
2 Geological Survey of India, Tripura-Mizorarn Division, B.K. Road, Banamalipuram, Agartala-790 001, IN
1 708, Maitri Apartments, 255, NSC Bose Road, Kolkata - 700 047, IN
2 Geological Survey of India, Tripura-Mizorarn Division, B.K. Road, Banamalipuram, Agartala-790 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 62, No 5 (2003), Pagination: 655-655Abstract
No Abstract.Full Text
- Deciphering Differential Uplift in Shillong Plateau Using Remote Sensing
Abstract Views :205 |
PDF Views:164
Authors
Affiliations
1 Geological Survey of India, Tripura-Mizoram Division, B.K. Road, Banamalipur, Agartala - 790 001, IN
1 Geological Survey of India, Tripura-Mizoram Division, B.K. Road, Banamalipur, Agartala - 790 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 62, No 6 (2003), Pagination: 773-777Abstract
Based on digital image processing of Landsat TM digital data covering Shillong plateau, it is proposed that the landmass in the east and west of Shillong plateau could have moved upwards with respect to the middle part. This differential uplift within the plateau could be due to vertical movement along NNE-SS W trending deep-seated faults and granite batholith emplacement.Full Text
- Post-Deccan Trap Faulting in Raigad and Thane Districts of Maharashtra
Abstract Views :182 |
PDF Views:2
Authors
Affiliations
1 Geological Survey of India (NER), Kumud Villa Complex, Shillong- 793 003, IN
1 Geological Survey of India (NER), Kumud Villa Complex, Shillong- 793 003, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 59, No 1 (2002), Pagination: 23-31Abstract
Major normal faults in Raigad and Thane Districts in the West Coast area of Maharashtra trend roughly N-S, with their eastern blocks upthrown and western blocks downthrown. The amounts of throw increase systematically from south to north for two normal faults (Mangaon Fault, Mahim Fault). With respect to the Mahim Fault, which is located in the over-steepened limb of Panvel Monoclinal Flexure, the blocks were drag folded on regional scale during their respective vertical movement along the fault surface. The gently southerly plunging (1 in 90) anticlinal drag flexure in eastern upthrown block was deeply dissected and eroded (especially in up the plunge direction), thus exposing the oldest lava flows. On the contrary, the youngest members of Deccan Trap (like volcanic agglomerates, acidic and intermediate extrusives, intertrappean rocks, spilites etc) could be preserved from erosion in the synclinal drag flexure of western downthrown block of Mahim Fault.There are few more normal faults (like Matheran Fault, Ulhas River Fault) trending roughly N-S between Mahim Fault and Western Ghat scarp. The eastern block of each of these faults is distinctly upthrown with respect to the western block, thereby developing a series of step-faults between the coastline and the Western Ghat scarp. Mumbai (Bombay), with a population of more than 12 million, is located on the western downthrown block of the western most normal fault in this step-faulting configuration.
Keywords
Raigad, Thane, West Coast, Maharashtra, Post-Deccan Trap Normal Faults, Step Faults.- Massive Phosphorus Accumulation in Soils: Kerala's Continuing Conundrum
Abstract Views :270 |
PDF Views:91
Authors
Affiliations
1 Indian Institute of Spices Research (ICAR), P.O. Box 1701, Marikunnu P.O., Calicut 673 012, IN
1 Indian Institute of Spices Research (ICAR), P.O. Box 1701, Marikunnu P.O., Calicut 673 012, IN
Source
Current Science, Vol 106, No 3 (2014), Pagination: 343-344Abstract
No Abstract.Full Text
- Secure Data Storage in Cloud with Decentralized Access Control Scheme and Anonymous Authentication
Abstract Views :162 |
PDF Views:2
Authors
Affiliations
1 Department of CSE, Narasu's Sarathy Institute of Technology, Salem, IN
1 Department of CSE, Narasu's Sarathy Institute of Technology, Salem, IN
Source
Wireless Communication, Vol 7, No 3 (2015), Pagination: 107-110Abstract
Our paper proposes a decentralized access control scheme for storing data or file in cloud securely with anonymous authentication. Authenticity of the content will be verified without knowing the user’s identity with the help of attribute based signature. Data will be encrypted under attribute based encryption and it will be decrypted only for users with attributes specified by the access policy using their key. Encryption and decryption keys are provided through decentralized scheme with two or more KDC’s and access control is provided by access control schemes which defines who have access to data.
Keywords
Access Control, Cloud Storage, Attribute Based Encryption, Attribute Based Signature, Decentralized.- A Fuzzy Classification Approach to Data Mining
Abstract Views :333 |
PDF Views:2
Authors
Affiliations
1 Department of MCA, Velalar College of Engineering and Technology, Thindal, Erode (Dt), Tamil Nadu, IN
2 School of Science & Humanities, Kongu Engineering College, Perundurai, Erode (Dt), Tamil Nadu, 638 052, IN
3 Anna University of Technology Coimbatore, Tamil Nadu, 638 057, IN
4 Department of MCA, Velalar College of Engineering and Technology, Thindal, Erode(Dt), Tamil Nadu, 638 012, IN
1 Department of MCA, Velalar College of Engineering and Technology, Thindal, Erode (Dt), Tamil Nadu, IN
2 School of Science & Humanities, Kongu Engineering College, Perundurai, Erode (Dt), Tamil Nadu, 638 052, IN
3 Anna University of Technology Coimbatore, Tamil Nadu, 638 057, IN
4 Department of MCA, Velalar College of Engineering and Technology, Thindal, Erode(Dt), Tamil Nadu, 638 012, IN
Source
Fuzzy Systems, Vol 3, No 8 (2011), Pagination: 343-347Abstract
Many applications tract to classify data for actionable alerts, which may include for example rule based algorithm, decision tree base algorithm, K-nearest neighbor and so forth. Some classification models are built for their accuracy. We propose a novel way to incorporate FSVM (Fuzzy support vector machine) with a fuzzy approach offers a good comparison between fastness and accuracy. This method can be used for any data set and shows a significant reduction in time to classify the data sets with more accuracy when compared to the SVM. With the fuzzy approach the SVM algorithm shows the high efficiency and good scalability. Our through performance study with some large database and categorical database has shown that FSVM out performs many well-known classifiers in terms of both accuracy and computational efficiency and scales well with regards to the size of the database.Keywords
Fizzy Classification, Entropy, Information Gain, SVM.- Post Deccan Trap Faulting in Raigad and Thane Districts of Maharashtra
Abstract Views :236 |
PDF Views:141
Authors
Affiliations
1 Repository Projects Section, Back End Technology and Development Division, Bhabha Atomic Research Centre, Mumbai - 400 084, IN
2 Geological Survey of India, Shillong, IN
1 Repository Projects Section, Back End Technology and Development Division, Bhabha Atomic Research Centre, Mumbai - 400 084, IN
2 Geological Survey of India, Shillong, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 60, No 3 (2002), Pagination: 347-347Abstract
No Abstract.Full Text
- Basic Compensation Principle and Reference Current Generation
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Authors
Affiliations
1 Department of ETC, Bharath University, Chennai–600073, Tamil Nadu, IN
2 Sairam Institute of Technology, Chennai– 600044, Tamil Nadu, IN
1 Department of ETC, Bharath University, Chennai–600073, Tamil Nadu, IN
2 Sairam Institute of Technology, Chennai– 600044, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 32 (2015), Pagination:Abstract
Reactive power compensation is an important aspect in the control of distribution systems. Reactive current in addition to increasing the distribution system losses, introduces various power quality problems like, harmonics, voltage sag, swell and poor load power factor. These power quality issues result in the malfunction of sensitive equipments. A Distribution Static Compensator (DSTATCOM) proves to be a viable solution for the mitigation of such power quality issues. The aim of this paper is to compare an optimized PI and a Fuzzy controlled DSTATCOM for reactive power compensation and harmonic mitigation. Here the PI controllers are first optimized by using error minimization criteria through Genetic algorithms and then replaced by a Fuzzy controller. Through various simulations it is concluded that the transient response of fuzzy controllers is better than the optimized PI controllersKeywords
Decoupled Current Control, Distribution Static Compensator (DSTATCOM), Fuzzy Logic Controllers, Genetic Algorithms, Integral Square Error (ISE), Power QualityFull Text
- Application of Passivity to Adaptive Control Compensation Systems
Abstract Views :140 |
PDF Views:0
Authors
Affiliations
1 Departement of ETC, Bharath University, Chennai – 600073, Tamil Nadu, IN
1 Departement of ETC, Bharath University, Chennai – 600073, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 32 (2015), Pagination:Abstract
In this paper the Model Reference Adaptive System (MRAS) is considered. The feedforward gain adjustment is done by using adaptive technique and feedforward gain compensation by passivity-based technique is presented. The adaptation of feedforward gain is considered by using MIT rule and the effect of variation of parameter values and adaptation gain on the response of the system is simulated. But to achieve more stable system, lyapunov stability theorem is used for parameter adjustment. It has been shown that the adjustment rule guarantees that error goes to zero. Finally input-output stability theorem is used to construct adjustment rules for the adaptive system. The passivity theorem is applied to construct adjustment laws. The compensating network is introduced so that the transfer function relating the error is Strictly Positive Real (SPR). The compensator is designed by using Kalman – Yakubovich (KY) Lemma. Simulation results are furnished after implementing the adaptive techniques. Algorithm for the design of compensator using KY Lemma is also presentedKeywords
Feedforward Gain, KY Lemma, MIT Rule, Parameter Adjustment, Passivity, Strictly Positive RealFull Text
- Study on Methanol Production with Vegetable in Rotating Reactor
Abstract Views :202 |
PDF Views:0
Authors
V. Srinivasan
1,
R. Kausalya
2
Affiliations
1 Department of Mechanical Engineering, Bharath University, Chennai – 600073, Tamil Nadu, IN
2 Department of Management Studies, Bharath University, Chennai – 600073, Tamil Nadu, IN
1 Department of Mechanical Engineering, Bharath University, Chennai – 600073, Tamil Nadu, IN
2 Department of Management Studies, Bharath University, Chennai – 600073, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 32 (2015), Pagination:Abstract
Fuel methanol is on demand nowadays. Lignocelluloses and algal biomasses are largely generated as waste materials out of agricultural practises and process industries. In the present work, methanol production by Saccharomyces cerevisiae was carried out using lignocellulosic biomass (vegetable) as a substrate and using rotating biological reactor that utilizes biologically pretreated vegetable as substrates for methanol production and its process optimization. During the batch experiment with varying substrate concentration (60-100 g/l), pH (4.8-5.8) and commercial cellulase enzyme concentration of (10- 20 mg/ml) resulted in 38.9 g/l of methanol concentration with a maximum of 17 % yield. The SEM analysis was carried out for analysing the structural morphology of the untreated, pretreated, hydrolysed and fermented samples.Keywords
Agricultural Waste, Biological Reactor, Lignocellulosic Biomass, Methanol, Optimization, VegetableFull Text
- Overview of Particle Swarm Optimization
Abstract Views :148 |
PDF Views:0
Authors
Affiliations
1 Dept of ETC, Bharath University,Chennai - 600073, IN
1 Dept of ETC, Bharath University,Chennai - 600073, IN
Source
Indian Journal of Science and Technology, Vol 8, No 32 (2015), Pagination:Abstract
This paper proposes the application of Particle Swarm Optimization (PSO) technique to solve Optimal Power Flow with inequality constraints on Line Flow. To ensure secured operation of power system, it is necessary to keep the line flow within the prescribed MVA limit so that the system operates in normal state. The problem involves non-linear objective function and constraints. Therefore, the population based method like PSO is more suitable than the conventional Linear Programming methods. This approach is applied to a six bus three unit system and the results are compared with results of Linear Programming method for different test cases. The obtained solution proves that the proposed technique is efficient and accurate.Keywords
Security Constrained Economic Dispatch, Optimal Power Flow, Particle Swarm OptimizationFull Text
- Application of Passivity to Adaptive Control Compensation Systems
Abstract Views :129 |
PDF Views:0
Authors
Affiliations
1 Department of ETC, Bharath University, Chennai - 600073, Tamil Nadu, IN
1 Department of ETC, Bharath University, Chennai - 600073, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 32 (2015), Pagination:Abstract
In this paper the model Reference Adaptive System (MRAS) is considered. The feedforward gain adjustment is done by using adaptive technique and feedforward gain compensation by passivity-based technique is presented. The adaptation of feedforward gain is considered by using MIT rule and the effect of variation of parameter values and adaptation gain on the response of the system is simulated. But to achieve more stable system, Lyapunov stability theorem is used for parameter adjustment. It has been shown that the adjustment rule guarantees that error goes to zero. Finally input-output stability theorem is used to construct adjustment rules for the adaptive system. The passivity theorem is applied to construct adjustment laws. The compensating network is introduced so that the transfer function relating the error is Strictly Positive Real (SPR). The compensator is designed by using Kalman-Yakubovich (KY) Lemma. Simulation results are furnished after implementing the adaptive techniques. Algorithm for the design of compensator using KY Lemma is also presented.Keywords
Feedforward Gain, KY Lemma, MIT Rule, Parameter Adjustment, Passivity, Strictly Positive Real.Full Text
- Protected Test Covering using Light Weight Block Cipher
Abstract Views :161 |
PDF Views:0
Authors
Affiliations
1 Department of Electronics Tele Communication, Bharath University, Chennai-600073, Tamil Nadu, IN
1 Department of Electronics Tele Communication, Bharath University, Chennai-600073, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 31 (2015), Pagination:Abstract
In testing of single chip there are many approach were found to need their requirement. But for the SOCs we have less, in this paper a Protected Test Wrapper - PTW design introduce to protect SOCs that is compatible with IEEE 1500 standards. PTW protects internal scan chains and primary inputs, primary outputs, which may contain many critical data during the normal system operation like encryption keys. In the earlier system testing that is original IEEE 1500 standard will not concern about the Primary Input and Primary Output security, where as this PTW will secure the primary input and output in both scan mode and normal system functional mode. To achieve this protected test wrapper no extra larger component are required by changing the IEEE 1500 with some light weight block cipher we protect the core from the hackerKeywords
Boundary Scan, Design for Testing, Light Weight Block Cipher, Protection.Full Text
- Thermal Analysis of Compression Ignition Engine Muffler and its Design Modification
Abstract Views :187 |
PDF Views:0
Authors
Affiliations
1 Department of Mechanical Engineering, Bharath University, Chennai-600 073, Tamil Nadu, IN
1 Department of Mechanical Engineering, Bharath University, Chennai-600 073, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 31 (2015), Pagination:Abstract
Automotive Silencers (or) Mufflers are used to minimize the noise level and vibrations produced in the engine exhaust gas. The Mufflers usually contain complex internal components such as extended inlet and outlet tubes, thin baffles with eccentric holes, internal connecting tubes, perforated tubes, flow plugs, and sound absorbing materials. In this project, thermal analysis is carried out in the existing muffler of C.I. Engine. The various influencing factors of muffler such as thermal concentration, thermal stress and properties of material have been analyzed by the software and the input values for the analysis are measured from the experimental setup. Based on the results of analysis, the optimal modification is to be done in the design in order to improve the life and performance of muffler.Keywords
Conical Shape, Fins, Heat, Taper, TemperatureFull Text
- Knowledge Attitudes and Practices About Malaria in Chennai Population
Abstract Views :143 |
PDF Views:0
Authors
Affiliations
1 Department of Computer Science, SRM Arts and Science College, Kattankulathur, Kanchipuram (T.N.), IN
2 Department of Micrologist, Sree Renga Hospital, Chengalpattu (T.N.), IN
1 Department of Computer Science, SRM Arts and Science College, Kattankulathur, Kanchipuram (T.N.), IN
2 Department of Micrologist, Sree Renga Hospital, Chengalpattu (T.N.), IN
Source
International Journal of Medical Sciences, Vol 4, No 1-2 (2011), Pagination: 29-33Abstract
Data mining refers to extracting or mining knowledge from large amounts of data. Data mining is multidisciplinary field, drawing work from area including data base technology, artificial intelligence machine learning neural network, statistical, pattern mining, knowledge based system, knowledge acquisition, information retrieval, high performance computing and data visualization. Data mining plays an important role in the knowledge discovery process in medical data base. Using data mining techniques Malaria diseases prevention of knowledge, attitude and practice we can be easily prediction from people attributes and various diseases of symptoms. Malaria remains one of the most causes of maternal and child morbidity and mortality in Tamilnadu population, despite the availability of effective interaction. This objective of this study was to learn the data mining knowledge discovery the techniques for prediction of KAP (knowledge attitude and practice) on fever diseases symptoms, prevention and awareness to develop the health care in our society. This study aims to describe the knowledge attitude, and practices towards malaria among rural, urban and sub urban peoples and to determine scoring predictors of urban people's of knowledge and practice. A multistage, stratified, random sample method was applied. A total of 1500 peoples, each group have 500 peoples completed confidential self administrated questioner. KAP towards malaria deficient among target populations, especially among urban, sub urban and rural peoples. Information, education and communication activity indicated to create awareness among the community.Keywords
People Knowledge, Attitutde and Practice, Malaria Diseases, Data Mining.- Healthcare Electronic Record Transaction Security Improvement on Java Swing Performance Prediction in Data Mining Techniques
Abstract Views :220 |
PDF Views:0
Authors
Affiliations
1 Department of Computer Science, SRM Arts and Science College, Kattankulathur, Kancheepuram (T.N.), IN
2 Sree Renga Hospital, Chengalpattu, Kancheepuram (T.N.), IN
3 P.G. Department of Biochemistry and Microbiology, K.M.G. College of Arts and Science, Gudiyattam, Vellore (T.N.), IN
1 Department of Computer Science, SRM Arts and Science College, Kattankulathur, Kancheepuram (T.N.), IN
2 Sree Renga Hospital, Chengalpattu, Kancheepuram (T.N.), IN
3 P.G. Department of Biochemistry and Microbiology, K.M.G. College of Arts and Science, Gudiyattam, Vellore (T.N.), IN
Source
Asian Journal of Bio Science, Vol 6, No 2 (2011), Pagination: 173-174Abstract
Data mining knowledge discovery techniques process of employing one or more machine learning techniques to automatically analysis and extract the knowledge from large database. Data mining explore action and analysis of large quantities of data in order to discover meaningful patterns and rules. ICT (Information Communication and Technology) reached all level in human being, but healthcare and pharmaceutical organization till they have patient of attributes, diseases of various sysmptoms, past history, and feature treatment of forecasting information of large database store and forwarding to retrievals through computer software necessary to healthcare relevant all organization. Electronic health record (EHR) system for necessary and high-quality patient treatment. Cautious design of delegation mechanism must be in place as a building block of various hospital cooperation, since the cooperation inevitably involves exchanging and sharing relevant patient data that are considered highly private and confidential. The delegation mechanism grants permission and restricts access rights of a cooperating partner. Patients are unwilling to accept the EHR system unless their health data are guaranteed proper use and disclosure, which cannot be easily achieved without different transaction of domain like various hospital respect to authentication and fine-grained access control. In addition, revocation of the delegate rights should be possible at any time during the cooperation. In this paper, we propose a secure EHR system, based on cryptographic constructions, to enable secure sharing of sensitive patient data during cooperation and preserve patient data privacy. Our EHR system further incorporates advanced mechanisms for fine-grained access control, and on-demand revocation, as enhancements to the basic access control offered by the delegation mechanism, and the basic revocation mechanism, respectively EHR system is demonstrated to fulfill objectives specific to the online transaction, encryption and decryption methods performance predict the data mining decision tree and clustering techniques.Keywords
Patient Electronic Health Record, Encryption, Decryption, Java Swing, Decision Tree Data Mining.- Sharp Variations in Groundwater Levels at the Same Location:A Case Study from a Heavily Overexploited, Fractured Rock Aquifer System Near Bengaluru, South India
Abstract Views :243 |
PDF Views:90
Authors
Affiliations
1 University of Madras, Chennai 600 025, IN
2 Ashoka Trust for Research in Ecology and the Environment, Bengaluru 560 064, IN
1 University of Madras, Chennai 600 025, IN
2 Ashoka Trust for Research in Ecology and the Environment, Bengaluru 560 064, IN
Source
Current Science, Vol 117, No 1 (2019), Pagination: 130-138Abstract
Analyses of 83 borehole camera video scans revealed that (i) measured groundwater levels show variations of up to about 200 m, even in borewells located in close proximity to each other; (ii) water-bearing joints located at shallow depths in deeper borewells often produce cascades of water which flow down-hole till they meet the water level; (iii) the downward flow of recharging waters directly through the existing bore-well shafts leads to the formation of a dewatered zone below the recharge zone and above the saturated zone, and (iv) the borewells completed in the dewatered zone show a direct relationship between water level and well depth – deeper the borewell, deeper is the water level. Only the currently yielding borewells, with at least one water-yielding joint below the water level give a fair estimate of the regional groundwater table.Keywords
Borehole Depth, Dewatered Zone, Fractured Rock Aquifer, Groundwater Level.Full Text
References
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- CGWB, Annual report for 2011–12, Central Ground Water Board, Faridabad, 2012.
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- Surface Soil and Subsoil Acidity in Natural and Managed Land-Use Systems in the Humid Tropics of Peninsular India
Abstract Views :186 |
PDF Views:87
Authors
K. M. Nair
1,
K. S. Anil Kumar
1,
M. Lalitha
1,
Shivanand
1,
S. C. Ramesh Kumar
1,
S. Srinivas
1,
Arti Koyal
1,
S. Parvathy
1,
K. Sujatha
1,
C. Thamban
2,
Jeena Mathew
2,
K. P. Chandran
2,
Abdul Haris
2,
V. Krishnakumar
2,
V. Srinivasan
3,
Jessy
4,
James Jacob
4,
J. S. Nagaraj
5,
Maria Violet D’Souza
5,
Y. Raghuramulu
5,
R. Hegde
1,
S. K. Singh
1
Affiliations
1 Regional Centre, ICAR-National Bureau of Soil Survey and Land Use Planning, Hebbal, Bengaluru 560 024, IN
2 ICAR-Central Plantation Crops Research Institute, Kasaragod 671 124, IN
3 ICAR-Indian Institute of Spices Research, Kozhikode 673 012, IN
4 Rubber Research Institute of India, Kottayam 686 009, IN
5 Coffee Research Institute, Chikmagalur 577 117, IN
1 Regional Centre, ICAR-National Bureau of Soil Survey and Land Use Planning, Hebbal, Bengaluru 560 024, IN
2 ICAR-Central Plantation Crops Research Institute, Kasaragod 671 124, IN
3 ICAR-Indian Institute of Spices Research, Kozhikode 673 012, IN
4 Rubber Research Institute of India, Kottayam 686 009, IN
5 Coffee Research Institute, Chikmagalur 577 117, IN
Source
Current Science, Vol 116, No 7 (2019), Pagination: 1201-1211Abstract
Natural forests and managed plantations constitute the largest land-use systems in the humid tropics of southwestern parts of Peninsular India comprising the Western Ghats and coastal plain. Soils therein are naturally acidic and the acidity is enhanced in managed land-use systems through inputs of chemical fertilizers. Plant nutrient deficiencies and mineral toxicities constrain crop production in acid soils. Surface soil and subsoil acidity in forest, coffee, rubber and coconut land-use systems was evaluated. The spatial pattern of surface soil and subsoil acidity pointed to low intensity of acidification in Malnad region of Karnataka, moderate acidity in northern Kerala and strong acidity in southern Kerala. Among the land-use systems studied, soils under natural forests and coffee plantations were only slightly acidic in surface soil and subsoil, whereas rubber- and coconut-growing soils were strongly acidic. Both natural and managed land-use systems, however, had strongly acid reaction in surface soil and subsoil in southern Kerala. Biomass production and crop yield are constrained in strongly acid soil by toxic levels of aluminium (Al) on soil exchange complex (>0.5 cmol (+) kg–1 soil) and depletion of basic cations of calcium, magnesium and potassium (base saturation less than 50% or Al saturation more than 50%). Surface soil acidity can be ameliorated by incorporating liming materials into surface soils. In case of subsoil acidity gypsum too should be incorporated. Under humid climate partial solubility of gypsum permits movement of calcium into the subsoil layers, wherein calcium replaces the aluminium on exchange complex and sulphate radical precipitates the aluminium by formation of aluminium sulphate.Keywords
Base Saturation, Humid Tropics, Land-Use Systems, Surface Soil and Subsoil Acidity.Full Text
References
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