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- A. P. Misra
- Subhash Chand Sylonia
- Vikrant Sharma
- Harsh Vardhan Singh
- Arbind Kumar Verma
- H. R. Meena
- P. K. Sharma
- Viveka Nand Singh
- B. K. Banerji
- A. K. Dwivedi
- Anurag Joshi
- Jai Prakash
- A. K. Sharma
- Barkha Sharma
- Parul
- Udit Jain
- Janaradan K. Yadav
- Ravneet Singh
- Raghvendra Mishra
- Shakti Pratap Singh
- P. K. Yadawa
- P. K. Dhawan
- R. R. Yadav
- Binu Kumar
- R. K. Bajpai
- T. N. Singh
Journals
- Indian Forester
- Indian Journal of Public Health Research & Development
- Research Journal of Animal Husbandry & Dairy Science
- Journal of Biological Control
- Journal of Horticultural Sciences
- Journal of Engineering Education Transformations
- Veterinary World
- Journal of Pure and Applied Ultrasonics
- Current Science
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Verma, A. K.
- Degradation of forests Due to Fallacious Yield Regulation and Harvesting: a Case Study from Vyara forest Division of Gujarat, India
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Indian Forester, Vol 128, No 8 (2002), Pagination: 835-845Abstract
Independent India inherited large areas of over-exploited forests. The reasons for over-exploitation were chiefly the indiscriminate felling of trees during war time, the over-exploitation by the rulers of the Princely States and the purely commercial outlook towards forest resources. Although, this was realised even during the early years of independence, forests continued to degrade due to the inadequate attention paid in restocking the forests and ineffective measures in controlling biotic interferences. It is also worth nothing that the forest degradation was more due to over-exploitation by authorised agencies than due to illicit cutting of trees for timber and firewood. These aspects are discussed in this paper using data from Vyara Forest Division of Gujarat State in India. Although the Vyara forests were managed under a Working Plan, the annual yield realised considerable exceeded the estimated value. This fact calls for the need for implementing Working Plan prescriptions in its entirety and not by parts. Further, there is a need to find out ways and means of volumetric control or numeric restrictions on fellings in all silvicultural systems. An analysis of the functioning of the Forest Labourers Co-operative Societies revealed that their role in forest conservation is questionable. Most often, the societies are mismanaged and represented by a small group of profit seekers who do not care for forest conservation. It is concluded that managerial inadequacies and greed of harvesting agencies are major factors contributing to forest degradation.
- Local Demands of forest Produce and Working Plan (A Case Study of Vyara forest Division in Gujarat)
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Indian Forester, Vol 127, No 8 (2001), Pagination: 855-864Abstract
National Forest Policy, 1988 recognises the dependence of the forest dwelling population and other poor living within and near forests, on the local forest resouree and prescribes and their domestic requirements of Fuelwood, Fodder, Minor Forest Produce and construction timber should be the first charge on forest produce. It is therefore necessary to estimate local demand of forest produce quantitatively while preparing or revising the Working Plan/ Management Plan of a forest area. The estimation would affect the quantity and quality of removals from the forest as well as guide the management prescriptions influencing species composition, rotation, harvesting regime and even cultural and tending operations. In this paper local requirement of forest produce in Vyara Forcst Division area of Gujarat has been estimated on the basis of primary data collected through sample survey and secondary information available from existing reliable data base. It has been found that the area is self sufficient, so far as local demands of timber is concerned. However large demand-supply gap exists in case of firewood even in the well-wooded localities. The gap can be bridged up by increasing firewood productivity, maximising fuelwood efficiency and using substitutes of firewood. Increase ill fuel wood and MFP giving species in the plantation, expansion of social forestry and JFM, delay in harvesting timber, installation of solar cooker, improved crematoria, improved earthen hearths and biogas plants, subsidised distribution of LPG in forested tracts and large scale awareness campaign have been recommended as methods for narrowing the demand supply gap of forest produce.- Silvlcultural and Management Options of JFM
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Indian Forester, Vol 126, No 5 (2000), Pagination: 569-578Abstract
The Joint Forest Management looks for a forestry design that matches and caters the needs of varied forest produce of local population in the shortest possible time. The suitable management and silvicultural initiative should be capable of matching the product basket with the needs of local people. Their income generation and employment opportunities are also to be looked after. As the regeneration of degraded land should be cost effective and remunerative, emphasis is laid on coppicing and cut-back of existing ischolar_mainstock, inducement of natural regeneration, seedling, gap plantation, soil and moisture conservation works as well as enrichment with Non-Timber Forest Produce yielding trees.At the same time tending operations, thinning and harvesting regime are adjusted such that multiple forest products are available to the community without reducing potential of the resource. It has also been found that JFM in degraded forest land is a financially viable proposition, however highly degraded patches should be kept outside the JFM system. Silvicultural models and management design of JFM are site specific and depend upon resource, resource environment and use community. Care has to be taken for bio-diversity conservation as well as enrichment of native species required locally. With these consideration an illustrative typical silvicultural and management model applied in JFM areas of South Gujarat has been detailed. The basic concepts for designing the site-specific options are discussed and substantiated with examples from Gujarat.- Paradigm and Perspective Changes in Indian Forestry
Abstract Views :184 |
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Indian Forester, Vol 125, No 1 (1999), Pagination: 25-36Abstract
The pattern of Forest Management in India and perspective changes with technology, organizational model, institutional frame work and consequential effects have been discussed for sustainable management of the forests.- Estimation of Regeneration Loss Due to Forest Fire in South Gujarat Forests
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Indian Forester, Vol 125, No 5 (1999), Pagination: 445-451Abstract
In this paper an attempt has been made to estimate the value of regeneration loss due to forest fire in South Gujarat.- A Two Year Prospective Study of Evaluation of the Role of Ultrasonography in Various Retinal and Choroidal Disorders in Western Uttar Pradesh
Abstract Views :188 |
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Authors
Affiliations
1 Department of Radiodiagnosis, Saraswathi Institute of Medical Sciences, Hapur-245101, IN
2 Department of Ophthalmology, Saraswathi Institute of Medical Sciences, Hapur, Uttar Pradesh, IN
3 Department of Radiodiagnosis, Saraswathi Institute of Medical Sciences, Hapur, Uttar Pradesh
4 Department of Pathology, Hindu Rao Hospital, Delhi-110007, IN
1 Department of Radiodiagnosis, Saraswathi Institute of Medical Sciences, Hapur-245101, IN
2 Department of Ophthalmology, Saraswathi Institute of Medical Sciences, Hapur, Uttar Pradesh, IN
3 Department of Radiodiagnosis, Saraswathi Institute of Medical Sciences, Hapur, Uttar Pradesh
4 Department of Pathology, Hindu Rao Hospital, Delhi-110007, IN
Source
Indian Journal of Public Health Research & Development, Vol 3, No 3 (2012), Pagination: 220-222Abstract
50 eyes of 50 patients referred from outdoor patient department and causality department were examined by ultrasound- B-mode in department of radiology of Saraswathi Institute of Medical Sciences, Hapur. A membrane-like echogenecity was found between the retina and the choroids. The acoustic characteristics were studied. The usefulness for the differential diagnosis of retinal and choroids detachment was demonstrated with several situations of the choroido-retinal pathology. The thickness of the retina and choroids can be measured in routine examinations. B mode ultrasonography will be helpful in the evaluation of retina and choroids in the post traumatic and post surgical cases.Keywords
Asherman Syndrome, Amenorrhea, Curettage, Intrauterine Adhesions, Endometrium, Trans-vaReferences
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- Slamovits TL, gardner TA. Ophthalmology. 1989; 96 (4): 555-568.
- Buerger DE, Biesman BS. Ophthalmology Clinics of North America 1998; 11(3): 381 -410.
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- Comparative Importance and Effectiveness of Livestock Services Perceived by Livestock Farmers of Uttar Pradesh
Abstract Views :413 |
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Authors
Affiliations
1 Division of Extension Education, Indian Veterinary Research Institute, Izatnagar, Bareilly (U.P.), IN
2 National Dairy Research Institute, Karnal (Haryana), IN
1 Division of Extension Education, Indian Veterinary Research Institute, Izatnagar, Bareilly (U.P.), IN
2 National Dairy Research Institute, Karnal (Haryana), IN
Source
Research Journal of Animal Husbandry & Dairy Science, Vol 5, No 2 (2014), Pagination: 140-142Abstract
The present investigation was carried out in two districts of Uttar Pradesh namely Bareilly and Lakhimpur Kheri to study the farmer's perception towards the comparative importance and effectiveness of different livestock services delivered to them. A total of 120 respondents were interviewed using a well-structured interview schedule constructed on the basis of responses obtained in pilot study. These respondents were selected randomly from three blocks of each district. Collected data were analyzed using statistical tools. After analysis of data it was found that most of the respondents from Bareilly, Lakhimpur Kheri and in pooled sample, respectively had given first rank to gynecological and obstetrical treatment followed by second rank to medical treatment, followed by Artificial insemination, vaccination, wound dressing etc. In terms of effectiveness livestock services delivered to the livestock farmers were average followed by poor. Their perception about the relative importance of different livestock services and effectiveness will provide a clear view to government as well as policy makers to strengthen and replicate the livestock Service provisions to make them excellent in terms of their effectiveness.Keywords
Effectiveness, Livestock Farmer, Livestock Services, Perception, Strengthen.References
- Ahuja, V. and Sen, A. (2002). Livestock service delivery and poor: Case of rural Orissa. In: Livestock service and poor. Paper proceedings and presentation of International Workshop, Bhubaneswar, India, pp. 191-199.
- Ahuja, V., George, P.S., Ray, S., Kenneth McConnell., Gandhi, V., Deininger, D.U. and de Haann, C. (2000). Agricultural services and the poor : Case of livestock health and breeding services in India, Indian Institute of Management, Ahmedabad; The World Bank, and Swiss Agency for Development and Co-operation, Bern:1-148.
- Bhalla, G.S. and Hazell, P. (1997). Food grains demand in India to 2020: A preliminary exercise. Econ. Polit. Weekly, 32 : A150-A154.
- deHaan, C., Schillhorn V.V., Tjaart., Brandenburg, B., Gauthier, J., le Gall, F., Mearns, R. and Simeon, M. (2001). Livestock Development: Implications for Rural Poverty, the Environment, and Global Food Security, The World Bank, Washington DC.
- Kleeman, G. (1999). Responses of the livestock services delivery and its management to the Asian economic crisis. Proceedings of the workshop on the implications of the Asian economic crisis for the livestock industry. Held in Bangkok on 6-9 July 1999. Organised by FAO, UN.
- LID (Livestock in Development) (1999). Livestock on Poverty Focused Development, LID, Somerset, UK.
- Ravishankar, A. and Birthal, S.P. (1999). The livestock sector in India: a country report with special emphasis on trade with Southeast Asian economies. Proceedings of the workshop on the Implications of the Asian economic crisis for the livestock industry. Held in Bangkok on 6-9 July: 213-232.
- Singh, R., Brithal, P.S. and Rathore, B.S (1998). Review of animal health service in India. Indian J. Ani. Sci., 68(5) : 420-424.
- World Bank. (1999). India Livestock Sector Review: Enhancing Growth and Development, The World Bank, Washington DC.
- Studies on the Coccinellid Predators of the Cabbage Aphid Brevicoryne brassicae in Himachal Pradesh
Abstract Views :234 |
PDF Views:172
Authors
P. K. Sharma
1,
A. K. Verma
2
Affiliations
1 Department of Entomology, Dr.Y.S.Parmar University of Horticulture and Forestry Solan, P.O. Nauni, 173 230, Himachal Pradesh, IN
2 Department of Entomology, Dr.Y.S.Parmar University of Horticulture and Forestry Solan, P.O. Nauni 173 230, Himachal Pradesh, IN
1 Department of Entomology, Dr.Y.S.Parmar University of Horticulture and Forestry Solan, P.O. Nauni, 173 230, Himachal Pradesh, IN
2 Department of Entomology, Dr.Y.S.Parmar University of Horticulture and Forestry Solan, P.O. Nauni 173 230, Himachal Pradesh, IN
Source
Journal of Biological Control, Vol 7, No 1 (1993), Pagination: 15-19Abstract
Surveys conducted during 1985-91 on cauliflower, cabbage and knol-khol yielded thirteen species of coccinellid predators on nymphs and adults of the cabbage aphid, Brevicoryne brassicae (Linn.), a serious pest of cole crops in the mid-hill regions of Himachal Pradesh. Among the frequently occurring species, adults of Adonia variegata (Goeze) were the first to resume activity by first week of February followed by Coccinella septempunctata Linn. in the first week of March, while most other coccinellids were active during the last week of March or later. C. septempunctata was the most abundant species accounting for 47.3 per cent of the adult count, followed by A. variegata (26.2%). The hyperparasitoid, Oomyzus scaposus (Thompson) (-Tetrastichus coccinellae Kurdj.) (Hymenoptera, Eulophldae) was recorded on the coccinellid predators during May-June. C. septempunctata was more voracious than A. variegata and Adalia tetraspilota Hope. The average consumption by C. septempunctata grub, was 323 and that of adults 3890 aphids.
Keywords
Brevicoryne brassicae, Natural Enemies, Adonia variegata, Adalia tetraspilota, Coccinella septempunctata, Hyperparasitoid Oomyzus scaposus.Full Text
- Effect of Gamma Irradiation on African Marigold (Tagetes erecta L.) Cv. Pusa Narangi Gainda
Abstract Views :272 |
PDF Views:166
Authors
Affiliations
1 Floriculture Section, National Botanical Research Institute, Rana Pratap Marg, Lucknow-226 001, IN
1 Floriculture Section, National Botanical Research Institute, Rana Pratap Marg, Lucknow-226 001, IN
Source
Journal of Horticultural Sciences, Vol 4, No 1 (2009), Pagination: 36-40Abstract
Seeds of African marigold cv. 'Pusa Narangi Gainda' were irradiated with 0, 100, 200, 300 and 400 Grays of gamma rays to induce mutation. Seeds were sown just after irradiation and 30-day old seedlings were transplanted into beds. Reduction in survival percentage, plant height, number of branches, leaf number, leaf size, plant-spread, stem diameter, increased foliage and floral abnormalities were observed upon irradiation and with increase in dose of gamma rays. LD50 was determined on survival basis. Leaf abnormality manifested itself as leathery texture of leaf, enhanced and irregular leaf thickness, asymmetric development of pinnate leaflets, reduction in pinnae number, chlorophyll variegation, pale and deep green leaves, narrow leaves and small leaves. Percentage of abnormal leaves and plants increased with increase in dose of gamma rays. Fasciation of stem was a common abnormality observed in all the treatments. Days to bud initiation, earliness in colour-appearance and days to full bloom were all significantly delayed upon exposure to gamma rays. Flower-head size, height and weight were highest at the lowest dose. Number of ray florets and size (length and width) decreased with increasing radiation dose. Floral abnormalities and % of plants with abnormal flower-heads increased with increasing dose of gamma irradiation. Floral abnormality included fasciation of flower-head and asymmetric development of ray florets. Stimulating effect of gamma irradiation was observed at 100 Grays where almost all the characters studied showed positive correlation, including growth and yield attributes. It is concluded that exposure to 100 Grays of gamma rays in African marigold cv. Pusa Narangi Gainda results in higher yield and marketable bloom.Keywords
Tagetes erecta, African Marigold, Pusa Narangi Gainda, Gamma Irradiation Induced Mutation.Full Text
- Management of Students Performance in Engineering Education:An Analysis
Abstract Views :180 |
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Authors
Affiliations
1 Department of Electrical Engineering, Thapar Polytechnic College, Patiala- 147004, IN
2 Department of Computer Science & Engineering, Thapar University, Patiala-147004, IN
3 Sant Sri ASARAM ji Gurukul, Sant Sri ASARAM ji Ashram, Ahmedabad, IN
4 Department of Electrical Engineering, Thapar Polytechnic College, Patiala-147004, IN
1 Department of Electrical Engineering, Thapar Polytechnic College, Patiala- 147004, IN
2 Department of Computer Science & Engineering, Thapar University, Patiala-147004, IN
3 Sant Sri ASARAM ji Gurukul, Sant Sri ASARAM ji Ashram, Ahmedabad, IN
4 Department of Electrical Engineering, Thapar Polytechnic College, Patiala-147004, IN
Source
Journal of Engineering Education Transformations, Vol 21, No 4 (2008), Pagination: 46-53Abstract
Engineering Education is a field of vast diversity and this being ever-demanding field of science and technology, the mediocre students find it hard to cope up with the increasing demands of engineering curriculum. Its important to improve the performance of an engineering graduate to help him develop in an all-round personality and a thorough professional in his respective field.
This paper deals with the effect of meditation on the Analytical power, Memory power, Concentration and Examination Performance of an engineering student. The proposed work provides a useful insight into the technique of meditation to be implied for improving the performance of an engineering graduate. As per the results obtained, after carrying out exhaustive study, we are encouraged to share this technique to be used by students in order to achieve excellence in the academic field of engineering.
Keywords
Engineering Education, Meditation, Analytical Power, Memory Power, Concentration, Examination Performance, of Meditation Effects.- Occurrence of Multidrug Resistant Escherichia coli in Groundwater of Brij Region (Uttar Pradesh) and its Public Health Implications
Abstract Views :168 |
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Materials and Methods: A total of 60 samples of groundwater were collected from six different sites and assessed for physicochemical (pH, color, taste, turbidity, total dissolved solids [TDS], total hardness [TH], chlorides, fluorides, nitrates, and iron) and microbiological parameters (standard plate count [SPC], most probable number test [MPN], E. coli).
Results: A majority of the samples were found to be out of the range for most of the parameters except iron. Particularly, high values of TDS (up to 9000 ppm), TH (1500 mg/L), chlorides (3250 mg/L), fluorides (2.5 mg/L), and nitrates (100.2 mg/L) were observed at most of the sites in the region highlighting the fact that groundwater of the area is not potable. Samples were turbid and salty to taste. High SPC values, up to 3500 colony-forming unit/ml and coliforms beyond BIS range were found in 40% samples suggesting gross microbial contamination. Only 2 sites (G3 and G5) had low MPN values. Overall 16 (26.67%) E. coli were isolated with 3 (18.75%) producing red colonies on conge red agar, hence supposed to be pathogenic. No E. coli O157:H7 was isolated. High antimicrobial resistance was observed against amoxicillin and erythromycin, whereas E. coli isolates were sensitive toward cefotaxime-clavulanic acid and imipenem. 12 isolates (75%) were multidrug resistant (MDR) with MDR index >20%, and 2 isolates (12.5%) were found to be extended spectrum beta-lactamases positive.
Conclusion: Groundwater is considered to be a safe option for potable water but it is obvious from the findings of this study that considerable physicochemical and microbial contamination is there in groundwater samples of Brij region. The occurrence of MDR E. coli in these waters is a matter of great public health concern.
Authors
Barkha Sharma
1,
Parul
2,
A. K. Verma
1,
Udit Jain
2,
Janaradan K. Yadav
2,
Ravneet Singh
2,
Raghvendra Mishra
2
Affiliations
1 Department of Epidemiology and Preventive Veterinary Medicine, College of Veterinary Science and Animal Husbandry, UP Pt Deen Dayal Upadhyay Veterinary University, Mathura-281001, Uttar Pradesh, IN
2 Department of Veterinary Public Health, College of Veterinary Science and Animal Husbandry, UP Pt Deen Dayal Upadhyay Veterinary University, Mathura-281001, Uttar Pradesh, IN
1 Department of Epidemiology and Preventive Veterinary Medicine, College of Veterinary Science and Animal Husbandry, UP Pt Deen Dayal Upadhyay Veterinary University, Mathura-281001, Uttar Pradesh, IN
2 Department of Veterinary Public Health, College of Veterinary Science and Animal Husbandry, UP Pt Deen Dayal Upadhyay Veterinary University, Mathura-281001, Uttar Pradesh, IN
Source
Veterinary World, Vol 10, No 3 (2017), Pagination: 293-301Abstract
Aim: The study evaluates the microbial as well as physicochemical pollution of groundwater of Brij region of Uttar Pradesh, a major tourist destination in the country along with estimating the drug resistance evident in the isolated Escherichia coli.Materials and Methods: A total of 60 samples of groundwater were collected from six different sites and assessed for physicochemical (pH, color, taste, turbidity, total dissolved solids [TDS], total hardness [TH], chlorides, fluorides, nitrates, and iron) and microbiological parameters (standard plate count [SPC], most probable number test [MPN], E. coli).
Results: A majority of the samples were found to be out of the range for most of the parameters except iron. Particularly, high values of TDS (up to 9000 ppm), TH (1500 mg/L), chlorides (3250 mg/L), fluorides (2.5 mg/L), and nitrates (100.2 mg/L) were observed at most of the sites in the region highlighting the fact that groundwater of the area is not potable. Samples were turbid and salty to taste. High SPC values, up to 3500 colony-forming unit/ml and coliforms beyond BIS range were found in 40% samples suggesting gross microbial contamination. Only 2 sites (G3 and G5) had low MPN values. Overall 16 (26.67%) E. coli were isolated with 3 (18.75%) producing red colonies on conge red agar, hence supposed to be pathogenic. No E. coli O157:H7 was isolated. High antimicrobial resistance was observed against amoxicillin and erythromycin, whereas E. coli isolates were sensitive toward cefotaxime-clavulanic acid and imipenem. 12 isolates (75%) were multidrug resistant (MDR) with MDR index >20%, and 2 isolates (12.5%) were found to be extended spectrum beta-lactamases positive.
Conclusion: Groundwater is considered to be a safe option for potable water but it is obvious from the findings of this study that considerable physicochemical and microbial contamination is there in groundwater samples of Brij region. The occurrence of MDR E. coli in these waters is a matter of great public health concern.
Keywords
Groundwater, Microbial Analysis, Multidrug Resistant Escherichia coli, Physicochemical Analysis.Full Text
- Effect of Electrical Resistivity on Ultrasonic Attenuation in FeSe Single Crystal at Low Temperature
Abstract Views :233 |
PDF Views:0
Authors
Affiliations
1 Department of Physics, University of Allahabad, Allahabad-211002, IN
2 Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, V.B.S. Purvanchal University, Jaunpur- 222003, IN
1 Department of Physics, University of Allahabad, Allahabad-211002, IN
2 Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, V.B.S. Purvanchal University, Jaunpur- 222003, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 41, No 3 (2019), Pagination: 69-73Abstract
The ultrasonic attenuation and velocities following electron viscosity mechanism has been computed in semi-metallic, superconducting single crystal Iron Selenide(FeSe) in low temperatures 10-70K. We have also calculated the electron-viscosity at different low temperature needed for the calculation of ultrasonic attenuation. The behaviour of ultrasonic attenuation is quite similar to its inverse electrical resistivity. The ultrasonic attenuation due to electron viscosity mechanism is most significant at 15 K. Computed results of ultrasonic parameters have been discussed.Keywords
Elastic Constant, Electrical Resistivity, Superconductor, Ultrasonic Attenuation.Full Text
References
- Singh D., Pandey D.K., Yadawa P.K. and Yadav A.K., Attenuation of ultrasonic waves in V, Nb and Ta at low temperatures, Cryogenics 49 (2009) 12-16.
- Singh D., Yadawa P.K. and Sahu S.K., Effect of electrical resistivity on ultrasonic attenuation in NpTe, Cryogenics 50 (2010) 476-479.
- Zvyagina G.A., Gaydamak T.N., Zhekov K.R., Bilich I.V., Fil V.D., Chareev D.A. and Vasiliev A.N., Acoustic characteristics of FeSe single crystals, Alett. J. Explor. Front. Phys. 101 (2013) 56005-56009.
- Bourgeois-Hope P., Chi S., Bonn D.A., Liang R., Hardy W.N., Wolf T., Meingast C., Doiron-Leyraud N. and Taillefer L., Thermal conductivity of the iron-based superconductor FeSe: nodelessgap with a strong two-band character. Phys. Rev. Lett. 117 (2016) 097003-097007.
- Liu X., Zhao L., He S., He J., Liu D., Mou D., Shen B., Hu Y., Huang J. and Zhou X., Electronic structure and superconductivity of FeSe-related superconductors, J. Phys.: Condens. Matter 27 (2015) 183201-183222.
- Subedi A., Density functional study of FeS, FeSe, and FeTe: Electronic structure, magnetism, phonons, and superconductivity, Phys. Rev. B78 (2008) 134514-134520.
- Yadav R.R. and Singh D., Behaviour of ultrasonic attenuation in intermetallics. Intermetallics. 9 (2001) 189-194.
- Kor S.K., Kailash , Shanker K. and Mehrotra P., Behaviour of acoustical phonons in metals in low temperature region. J. Phys. Soc. Jpn. 56 (1987) 2428-2432.
- Kor S.K., Pandey G. and Singh D., Ultrasonic attenuation in semi-metallic GdX single crystals (X = P, As, S bans Bi) in the temperature range 10 to 300 K. Indian J. Pure Appl. Phys. 39 (2001) 510-513.
- Yadawa P.K. and Yadav R.R., Ultrasonic study of intermediate-valent intermetallic YbAl2 at different physical conditions. Multidiscip. Model. Mat. Str. 5 (2009) 59-76.
- Pandey D.K. and Pandey S. Ultrasonics: A technique of material characterization.Acoustic Waves, Ed. Dissanayake D., Intech Open Ltd., London (2010) 397-430.
- Bömmel H.E., Ultrasonic attenuation due to latticeelectron interaction in normal conducting metals, Phys. Rev. 100 (1955) 557-558.
- Mason W.P., Ultrasonic attenuation due to lattice-electron interaction in normal conducting metals, Phys. Rev. 97 (1955) 557-558.
- Poker D.B. and Klabunde C.E., Temperature dependence of electrical resistivity of vanadium, platinum, and copper, Phys. Rev. B. 26 (1982) 7012-7014.
- Routa G.C., Ojhab M.S. and Beherac S.N., Electron-phonon coupling and longitudinal sound velocity in heavy fermion systems, Physica B367 (2005) 101-113.
- Yadav R.R., Tiwari A.K. and Singh D., Effect of pressure on ultrasonic attenuation in Ce monopnictides at low temperatures, J. Mater. Sci. 40 (2005) 5319-5321.
- Singh D., Bhalla V., Kumar R. and Tripathi S., Behaviour of acoustical phonons in CeAs in low temperature region, Indian J. Pure Appl. Phys. 53 (2015) 169-174.
- Numerical analysis of heat dissipation through granite and clay in the multi-barrier system of a geological disposal facility
Abstract Views :160 |
PDF Views:85
Authors
Affiliations
1 Homi Bhabha National Institute, Mumbai 400 094, IN
2 Indian Institute of Technology (BHU), Varanasi 221 005, IN
3 Indian Institute of Technology Bombay, Mumbai 400 076, IN
1 Homi Bhabha National Institute, Mumbai 400 094, IN
2 Indian Institute of Technology (BHU), Varanasi 221 005, IN
3 Indian Institute of Technology Bombay, Mumbai 400 076, IN
Source
Current Science, Vol 122, No 9 (2022), Pagination: 1089-1093Abstract
High-level heat-emitting long-lived vitrified radioactive waste produced during recycling of the spent nuclear fuel is under consideration for permanent disposal in deep geological formations with appropriate thermomechanical, hydrogeological and geochemical properties. The capability of these rock formations ensuring long-term confinement and isolation of such waste from the environment is significantly controlled by their efficiency in smoothly dissipating the heat emanating from the waste. A number of rock types such as basalt, granite, clay stones, volcanic tuff, argillites, etc. are being evaluated worldwide as well as in India. In this study, a granite from Jalore and bentonite from Barmer, both from Rajasthan, India, have been evaluated for their heat dissipation capacity. The study revealed that the temperature within granite at the centre of the canister reached 55.21°C, resulting in a thermal stress of 25.50 MPa. Bentonite experienced a temperature of 67.42°C in the central part with maximum thermal stress and displacement of 1.78 MPa and 0.446 mm respectively. A displacement of 0.997 mm was recorded at the granite–bentonite interface. Thus, no significant microcrack formation or undesirable displacement was observed within the granite as well as in bentonite, suggesting their capability to isolate and confine the heat-emitting source for extended periods.Keywords
Bentonite, deep geological repository, granite, radioactive waste, thermo-mechanical analysis.Full Text
References
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