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Journals
- Indian Forester
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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
Kumar, R.
- Morphological Characterization of Terminalia tomentosa - Primary Food Plant of Tasar Silkworm, Antheraea mylitta D.
Abstract Views :596 |
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Leaf shape
Authors
Source
Indian Forester, Vol 135, No 12 (2009), Pagination: 1677-1685Abstract
A study was carried out during 2005-2007 on morphological characterization of Terminalia tomentosa W&A. germplasm in the field gene bank at Central Tasar Research and Training Institute, Ranchi. A total of 50 accessions were grouped into 17 different morphological descriptors. Plant nature was erect in most of the accessions (45) except in 5 accessions where it was spreading in nature. Leaf shape was ovate (27), elliptical (16), lanceolate (4), oblique (2) and obovate (1) in the accessions studied. Most of the accessions showed pubescence in the leaf and only 2 accessions had glabrous nature of leaf. Phyllotaxy was of opposite type in all the accessions. Maximum accessions have medium size of lamina length except in 15 accessions where it is of large size. Twenty six accessions have medium and fourteen accessions have short internodal distance. Leaf moisture was medium in 42 and high in 3 accessions. This characterization will help in isolating the economically useful accessions for future breeding programme in Terminalia tomentosa.Keywords
Terminalia tomentosa, Germplasm, Accessions, Morphological Characterization,Leaf shape
- Reclamation of Degraded Soil through Tree Plantation - Litter and Fertility Changes
Abstract Views :400 |
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Authors
Source
Indian Forester, Vol 133, No 5 (2007), Pagination: 647-654Abstract
This paper evaluates the relative efficacy of plantations of different tree species in improvement of high pH soil. The 12 tree species studied in general were effective in bringing about improvement in the soil properties as reflected by the changes in pH, EC, organic carbon, available nitrogen, phosphorus and potassium. Higher available N, P2O5 and K2O as well as higher organic carbon percentage were noted under canopy of Albizia procera followed by Leucaena leucocephala. The pH and EC were lowest under Albizia procera and changes were observed from 8.7 to 7.7 and 0.76 to 0.40 dS m-1, respectively in the span of 12 years. Albizia procera produced maximum litter fall (13.95 t ha-1year-1) followed by Leucaena leucocephala (13.25 t ha-1year-1) plantation. The nutrients returned through litter fall followed the order N>K>P in all the tree species and was helpful in reclamation of high pH soils.- Vegetative Propagation of Terminalia myriocarpa Through Cuttings
Abstract Views :470 |
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Authors
Source
Indian Forester, Vol 137, No 1 (2011), Pagination: 121-124Abstract
no abstract- Provenance Variations in Seed Characteristics and Germination Behaviour of Terminalia arjuna and Terminalia tomentosa
Abstract Views :546 |
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Authors
Source
Indian Forester, Vol 137, No 2 (2011), Pagination: 216-220Abstract
Studies for seed morphology, seedling growth and biomass attributes were made in 25 provenances of Terminalia arjuna (11) and T. tomentosa (14). A wide variation was recorded for 13 seed and seedling traits in both the species. Single seed weight ranged between 1.15 to 4.52 g in T. arjuna and 0.87 to 2.76 g in T. tomentosa. Germination per cent was maximum (83.33) in T. arjuna seeds from Chakradharpur (Jharkhand). Production of fresh biomass was maximum (2.03 g) in T. tomentosa seedlings from Kharsawan (Jharkhand). Root shoot ratio an important parameter in initial establishment of seed ling was also highest (3.08:1) in seedlings of T. tomentosa from Ranka (Jharkhand).Vigour index ranged between 669.80% (T. arjuna) to 580.80 % in T. tomentosa. A positive and significant correlation was found between emergence index and germination per cent, germination speed, ischolar_main length and vigour index. Based on the vigour index, ischolar_main/shoot ratio plus trees of T. arjuna from Chakradharpur and Garwha and of T. tomentosa from Baharagoda have been identified for multiplication.Keywords
Terminalia Arjuna, T. tomentosa, Provenances, Germination, Biomass Attributes- Screening of Different Germplasms against Floral Malformation of Mango in Eastern Bihar
Abstract Views :446 |
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Authors
Affiliations
1 Department of Plant Pathology, Bihar Agricultural University, Sabour, Bhagalpur, Bihar, IN
1 Department of Plant Pathology, Bihar Agricultural University, Sabour, Bhagalpur, Bihar, IN
Source
International Journal of Agricultural Sciences, Vol 9, No 2 (2013), Pagination: 499-503Abstract
Mango germplasm comprised of 51 varieties was evaluated for resistant/tolerance against panicle malformation at Sub Tropical Fruit Farm, Department of Horticulture, Bihar Agricultural University, Sabour, Bhagalpur. Out of these only Rumani was Resistant, 31 were tolerant, 5 were moderately tolerant and 9 were moderately susceptible. While Neelam was highly susceptible under the climatic condition of this region. Attack was highest in Neelam (50.00 %) followed by the Gulabkhas (31.2), Irvin (31.00 %) and Amrapali (27.4 %) and lowest in Lalmohan (1.3 %) followed by Latkampoo, Maldah (Surajgarha), and Mulayamjam (1.5 %) and Gaurjeet (1.8 %). The resistant and lowest affected varieties may be used for incorporating their immune/tolerance in the other commercial varieties through breeding programme.Keywords
Mango Crop, Mangifera Indica, Malformation, Germplasm- Effect of Genetic and Non-Genetic Factors on Milk Yield and Milk Constituents of Sahiwal Cattle
Abstract Views :466 |
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Authors
Affiliations
1 Division of Dairy Cattle Breeding, National Dairy Research Institute, KARNAL (HARYANA), IN
2 Division of Dairy Cattle Nutrition, National Dairy Research Institute, KARNAL (HARYANA), IN
3 Livestock Production and Management Section, National Dairy Research Institute, KARNAL (HARYANA), IN
4 Bihar Veterinary College, PATNA (BIHAR), IN
1 Division of Dairy Cattle Breeding, National Dairy Research Institute, KARNAL (HARYANA), IN
2 Division of Dairy Cattle Nutrition, National Dairy Research Institute, KARNAL (HARYANA), IN
3 Livestock Production and Management Section, National Dairy Research Institute, KARNAL (HARYANA), IN
4 Bihar Veterinary College, PATNA (BIHAR), IN
Source
Research Journal of Animal Husbandry & Dairy Science, Vol 6, No 1 (2015), Pagination: 44-47Abstract
The present study pertained to records on milk production and milk constituents of 259 Sahiwal cattle with 600 lactations spread over a period of 10 years from 2001 to 2010, collected from Dairy Cattle Breeding division of National Dairy Research Institute, Karnal, Haryana. To study the effect of various genetic and non-genetic factors on milk yield and milk constituents traits, mixed model least square analysis was used for analysis of data. Overall least square mean for all lactation traits of total milk yield (TMY), milk yield in 305 days or less (305MY), lactational average fat per cent (LFA) and lactational average solid not fat per cent (LSA) were 1880.39 ± 73.82 kg, 1782.97 ± 68.37 kg, 4.71 ± 0.01 per cent and 8.81 ± 0.01 per cent, respectively. Analysis of variance showed that the differences were statistically significant for the effect of sire on TMY and 305MY; period on all the traits except TMY; parity on 305MY. However, the effect of season of calving was not found significant on all the traits.Keywords
Genetic and Non-Genetic Factors, Mixed Model, TMY, 305MY, LFA, LSA.- Epimutations and Genetic Aberration Adversely Affect ART Outcome
Abstract Views :335 |
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Authors
Affiliations
1 Department of Anatomy, AIIMS, New Delhi, IN
2 AIIMS, IN
3 ART Center, Army Research and Referral hospital, IN
1 Department of Anatomy, AIIMS, New Delhi, IN
2 AIIMS, IN
3 ART Center, Army Research and Referral hospital, IN
Source
Journal of Endocrinology and Reproduction, Vol 11, No 1 (2007), Pagination: 49-51Abstract
In the last decade the advent of ART has proven to be a boon for the infertile couple. In a large number of infertile couples there may be a genetic basis. Such couples who harbor genetic abnormalities need to be provided comprehensive counseling prior to opting for ART. Despite state of art technology and professional expertise, the carry home live-birth rate in ART is low. One of the factors responsible for low success rate of ART in couples opting for ART could be genetic. We analyzed 350 couples with recurrent spontaneous abortions (RSA) among whom 86 were couples with recurrent ART/ICSI failure. All couples with 3 or more ART failures were referred for cytogenetic, Yq microdeletion and mitochondrial mutation analysis. Among these 86 couples cytogenetic abnormalities were detected in 32 (20 cases in the male and 12 cases in the female). Yq microdeletions were detected from genomic DNA isolated from blood in 7 men whereas 9 men showed Yq microdeletions in DNA isolated from spermatozoa. High frequency of mitochondrial mutations and deletion of 4977 were also detected in sperm DNA (n=3) and blood of the female partner (n=4). These genetic abnormalities may be iatrogenically transmitted to the offspring. In cases with sex chromosomal and autosomal aberrations there is probability of poor embryo development and, consequently, implantation failure and early fetal loss. ART is a very expensive technique and recurrent ART/IVF failure would result in severe financial burden and physical stress, coupled with emotional stress. It is suggested that all couples opting for ART must undergo genetic analysis.Keywords
ART, Chromosome, Epigenetics, Genetic Counseling, ICSI, Implantation Failure, Recurrent Miscarriage.- An Improved Spectrum Sensing for Cognitive Radio Networks with Rayleigh Fading Channel
Abstract Views :297 |
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Authors
K. Kalimuthu
1,
R. Kumar
1
Affiliations
1 SRM University, Chennai, IN
1 SRM University, Chennai, IN
Source
Wireless Communication, Vol 3, No 9 (2011), Pagination: 630-634Abstract
Cognitive radio devices will be able to sense and dynamically use frequency bands for network access. This will be done by autonomous detection of unoccupied bands in the radio spectrum. Several factors like fading and shadowing affects the ability of the cognitive radio to detect the primary user. The current research shows that cooperation among the cognitive users can increase the detection probability for a given probability of false alarm. Previous research work shows that, the probability of detection is achieved maximum of 0.9 in AWGN channel. In this paper, we propose a new method for capacity maximization by minimizing probability of signal outage. And also increases the probability of detection by increasing sensing time for Rayleigh fading channel. Simulation results show promising performance results of the proposed technique are increased probability of detection and considerably maximizing the channel capacity.Keywords
Cooperative, Energy Detection, Outage Probability and Rayleigh Fading.- Improvement of TCP Throughput in Wireless Networks with High Delay Round-Trip Time
Abstract Views :290 |
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Authors
Affiliations
1 Department of IT, Sri Ramkrishna Institute of Technology, Coimbatore 10, Tamilnadu, IN
2 Department of MCA, Sri Ramkrishna Institute of Technology, Coimbatore - 10. Tamilnadu, IN
1 Department of IT, Sri Ramkrishna Institute of Technology, Coimbatore 10, Tamilnadu, IN
2 Department of MCA, Sri Ramkrishna Institute of Technology, Coimbatore - 10. Tamilnadu, IN
Source
Wireless Communication, Vol 2, No 3 (2010), Pagination: 61-65Abstract
Highly variable round-trip times (RTTs) in wireless networks can induce spurious timeouts, thus unnecessarily degrading throughput for the Transmission Control Protocol (TCP). In this paper, we propose and study two effective ways to improve TCP throughput in wireless networks. The first technique is to select a retransmission timeout (RTO) threshold higher than that in the de facto standard. Simulation reveals that the proposed method reduces timeouts and provides a relative throughput gain up to 13.7% based on RTT measurements in a commercial 3G network and in a simulated network environment. The second technique is an appropriate use of selective repeat (SR) and go-back-N (GBN) as retransmission policies upon packet timeout. We find that when RTTs have reasonable temporal correlation and packets can arrive out-of-order at the receiver, GBN can improve throughput over the SR policy. Specifically, based on the RTT measurements in the 3G network, our results show that GBN provides a 12% throughput gain over the SR policy.
Keywords
End-To-End Performance, Split TCP, TCP, Timeout, Throughput, Wireless Networks.- Capacity Comparison of WCDMA Network for Different Coding Scheme
Abstract Views :282 |
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Authors
K. Ayyappan
1,
R. Kumar
2
Affiliations
1 ECE department of Rajiv Gandhi College of Engineering and Technology, Pondicherry, IN
2 Department of Electronics and Communication Engineering, SRM University, Chennai, IN
1 ECE department of Rajiv Gandhi College of Engineering and Technology, Pondicherry, IN
2 Department of Electronics and Communication Engineering, SRM University, Chennai, IN
Source
Wireless Communication, Vol 2, No 2 (2010), Pagination: 41-46Abstract
The wide-band code division multiple access (WCDMA) based 3G and beyond cellular mobile wireless networks are expected to provide a diverse range of multimedia services to mobile users with guaranteed quality of service (QoS). To serve diverse quality of service requirements of these networks it necessitates new radio resource management strategies for effective utilization of network resources with coding schemes. Call admission control (CAC) is a significant component in wireless networks to guarantee quality of service requirements and also to enhance the network resilience. In this paper capacity enhancement for WCDMA network with convolution coding scheme is discussed and compared with Block code and without coding scheme to achieve a better balance between resource utilization and quality of service provisioning. The model of this network is valid for the real-time (RT) and non-real-time (NRT) calls having different data rate. Simulation results demonstrate the effectiveness of the network using convolutional code in terms of capacity enhancement and QoS of the voice and data services.
Keywords
Call Admission Control, Wide Band Code Division Multiple Access, Wireless Networks, Quality of Service.- Capacity Enhancement of WCDMA Network Using Utility based CAC Scheme with AMR for different Decoding Scheme
Abstract Views :318 |
PDF Views:2
Authors
K. Ayyappan
1,
R. Kumar
2
Affiliations
1 ECE Department of Rajiv Gandhi College of Engineering and Technology, Pondicherry, IN
2 Department of Electronics and Communication Engineering, SRM University, Chennai, IN
1 ECE Department of Rajiv Gandhi College of Engineering and Technology, Pondicherry, IN
2 Department of Electronics and Communication Engineering, SRM University, Chennai, IN
Source
Networking and Communication Engineering, Vol 5, No 11 (2013), Pagination: 489-494Abstract
The wide-band code division multiple access (WCDMA) based 3G and beyond cellular mobile wireless networks are expected to provide a diverse range of multimedia services to mobile users with guaranteed quality of service (QoS). To serve diverse quality of service requirements of these networks a new radio resource management strategies for effective utilization of network resources is required. For that Adaptive Multi-Rate (AMR) will be used for voice applications in universal mobile telecommunication System (UMTS) systems where high spectral efficiency and system stability are required while guaranteeing a good speech quality. To investigate the trade-off between the system resource utilization and the provided quality of voice services, by proposing a method that considers both aspects of quality and capacity for the optimal assignment of speech data rates in 3rd generation cellular systems in this paper. So a new Call Admission Control (CAC) scheme is proposed to enhance capacity of WCDMA network based on the utilization services with AMR for different decision decoder. The model of this network is valid for the real-time (RT) and non-real-time (NRT) calls having different data rate. Simulation results demonstrate the capacity of the network using utility based CAC scheme with soft decision decoder is higher than that of hard decision decoder.Keywords
Call Admission Control, Wide Band Code Division Multiple Access, Wireless Networks, Quality of Service.- Handover Initiation in 3G/WLAN Integrated Networks
Abstract Views :370 |
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Authors
Affiliations
1 ECE Department of Rajiv Gandhi College of Engineering and Technology, Pondicherry, IN
2 Electronics and Communication Engineering Department of Sri Manakula Vinayagar College of Engineering and Technology, Pondicherry, IN
3 Department of Electronics and Communication Engineering, SRM University, Chennai, IN
1 ECE Department of Rajiv Gandhi College of Engineering and Technology, Pondicherry, IN
2 Electronics and Communication Engineering Department of Sri Manakula Vinayagar College of Engineering and Technology, Pondicherry, IN
3 Department of Electronics and Communication Engineering, SRM University, Chennai, IN
Source
Networking and Communication Engineering, Vol 2, No 2 (2010), Pagination: 36-41Abstract
Next generation wireless network is envisioned as a convergence of different wireless access technologies providing the user best connection any where any time to improve the systems resource utilization. In such converged systems, the heterogeneous co-existence of access technologies with largely different characteristics results in handoff asymmetry that differs from traditional intra-network handoff (horizontal handoff) problem. The seamless and efficient handoff between different access technologies (vertical handoff) is essential and remains a challenging problem. The parameters measured to determine handoff are received signal strength, signal to noise ratio and bit error rate. In this paper, an analytical framework to evaluate the performance of vertical handover between wireless access networks in terms of received signal strength, is validated by simulation. It is likely that WLAN will become an important complementary technology to 3G cellular systems and typically used to provide hotspot coverage where there is a high density of users.Keywords
Heterogeneous Wireless Networks, Wireless LAN, Hiperlan, Handoff, Path Loss, Received Signal Strength.- Effect of Heat Treatment on the Stability of Oxalic Acid in Selected Plant Foods
Abstract Views :386 |
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Authors
Affiliations
1 Food Engineering and Packaging Division Defence Food Research Laboratory, Mysore-570011, IN
1 Food Engineering and Packaging Division Defence Food Research Laboratory, Mysore-570011, IN
Source
The Indian Journal of Nutrition and Dietetics, Vol 43, No 8 (2006), Pagination: 337-340Abstract
Vegetables form an essential component of the meal by providing vitamins, minerals such as iron, calcium, magnesium, zinc and other nutrients important for human health. In most developing countries, vegetables are most reliable source of minerals and vitamins. The vegetables contribution of minerals and vitamins to human nutrition is however limited due to the presence of antinutritional factors that render some of the nutrients unavailable for human nutrition. The most common antinutritional factors in vegetables are oxalic acid, phytic acid and tannic acid. Oxalate is a common constituent of plants, which accumulate higher levels of dicarboxilic acid anion.- Traumatic Hip Dislocations in Children:A Case Report of Two Cases
Abstract Views :337 |
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Authors
Affiliations
1 Department of Orthopaedics, MGIMS, Sewagram, Wardha, IN
1 Department of Orthopaedics, MGIMS, Sewagram, Wardha, IN
Source
The Indian Practitioner, Vol 70, No 1 (2017), Pagination: 27-29Abstract
Traumatic dislocation of hip in children is relatively rare. We report two cases of hip dislocation in childrenone is posterior and other is anterior inferior who presented to casualty at MGIMS, Sewagram, Wardha, M.S. (India). The Hip dislocation diagnosed by clinical examination and radiological findings using X-ray. There was no neurovascular deficit. Dislocations were reduced under I.V. sedation immediately, post reduction X-ray is obtained and skin traction applied to the affected site for 3 weeks.Keywords
Traumatic Hip Dislocation, Children, Posterior, Anterior.References
- Avery DM 3rd, Carolan GF. Traumatic obturator hip dislocation in a 9-year old boy. Am J Orthop 2013; 42(9): 81-3.
- Vialle R, Odent T, Pannier S, Pauthier F,Laumonier F, Glorian C. Traumatic hip dislocation in childhood. J Pediatr Or thop 2005; 25(2):138-144.
- Herrera-Soto JA, price CT. Traumatic hip dislocations in children and adolescent: pitfalls and complications. J Am Acad Orthop Surg 2009; 17(1):15-21.
- Bowen JR,Kotzias-Neto A. Developmental dysplasia of the hip. 5th edn.Broolandville, Md. Data Trace publishing Company. 2006.
- C.F.Moseley. Fractures and dislocations of the hip. Instructional course lectures 1992;41:397-401.
- Gennari JM, Merrot T, Bergoin V, Turcat Y, Bergoin M. X ray transparency interpositions after reduction of traumatic dislocations of the hip in children. Eur J Pediatr Surg 1996;6(5):28893.
- Ayadt K, Trigui M, Gdoura F, Ellcuch B, Zribi M,Keskes H: Traumatic hip dislocations in children. Rev Chir Orthop Reparatrice Appar Mat 2008;94(1):19-25.
- Garcfa S, Hidalgo AM. Luxacion traumatica de cadera en nino de dos anos. Rev esp de Cirugta Osteoarticular 2000;35(204):444-447.
- Campbell WC. Cirugta Orthopedica 10a Educ. II:1480.
- D.E. Pearson R.J.Mann. Traumatic hip dislocation in children. Clinical Orthopaedics and Related Research. 1973;92:189-194.
- A. Glass and H.D.W. Powell. Traumatic dislocation of the hip in children. An analysis of 47 patients. Journal of Bone and Joint Surgery B 1961;43:29-37.
- R.D.Salisbury and D.M. Eastwood. Traumatic dislocation of the hip in children. Clinical Orthopaedics and Related Research 2000;377:106-111.
- M.J. stewart, L.W. Milfrod . Fracture-dislocation of the hip;an end result study. Journal of Bone and Joint Surgery. Americal volume 1954;36(2):345-342.
- A. Barquet. Avascular necrosis following traumatic hip dislocation in childhood: factors of influene. Acta Orthoapedica Scandinavica 1982;53(5):809-813.
- Performance Analysis of Rectangular MPA Using Different Substrate Materials for WLAN Application
Abstract Views :424 |
PDF Views:3
Authors
Affiliations
1 Department of Electronics and Communication Engineering, Rajiv Gandhi College of Engineering and Technology, IN
2 Department of Electronics and Communication Engineering, SRM University, IN
1 Department of Electronics and Communication Engineering, Rajiv Gandhi College of Engineering and Technology, IN
2 Department of Electronics and Communication Engineering, SRM University, IN
Source
ICTACT Journal on Communication Technology, Vol 8, No 1 (2017), Pagination: 1447-1452Abstract
In this paper, a rectangular microstrip patch antenna (MPA) is designed using different substrate materials for analyzing the performance of the MPA. Alumina (Al2O3), Bakelite, Beryllium oxide (BeO), Gallium Arsenide (GaAs), RT-Duroid and Flame Retardant 4 (FR-4) are the six different substrate used in the design. The size of the rectangular microstrip patch antenna varies according to the dielectric constant of substrate materials used. The operating frequency taken for this analysis is 5.8 GHz. The proposed design provides the study on the performance of rectangular microstrip patch antenna for different substrate materials using the same frequency. This study conveys that which substrate material provides better performance. Moreover, this comparative study conveys that which substrate material provides better performance. The simulation parameters are investigated using HFSS.Keywords
Rectangular Microstrip Patch, Substrate Materials, Al2O3, Bakelite, BeO, GaAs, RT-Duroid and FR-4 and HFSS.References
- Constantine A. Balanis, “Antenna Theory Analysis and Design”, 3rd Edition, Wiley, 2015.
- T. Jayachitra, V.K. Pandey and Anshuman Singh, “Design of Microstrip Patch Antenna for WLAN Applications”, International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, Vol. 3, No. 3, pp. 17-22, 2014.
- Sant Sharan Shukla, Rahul Kumar Verma and Gurpreet Singh Gohir, “Investigation of the effect of Substrate material on the performance of Microstrip antenna”, Proceedings of 4th International Conference on Reliability, Infocom Technologies and Optimization, pp. 1-3, 2015.
- Amba Srivastava and Nandita Pradhan, “Analysis of Different Substrate Material and Frequency on Microstrip Patch Antenna”, International Journal of Electronics, Electrical and Computational System, Vol. 6, No. 2, pp. 58-64, 2017.
- Gurpreet Kaur and Sonia Goyal, “To Study the Effect of Substrate Material for Microstrip Patch Antenna”, International Journal of Engineering Trends and Technology, Vol. 36, No. 9, pp. 490-493, 2016.
- Sagar D. Mahamine, Rahul S. Parbat, Shekhar H. Bodake and Mahesh P. Aher, “Effects of Different Substrates on Rectangular Microstrip Patch Antenna for S-band”, International Conference on Automatic Control and Dynamic Optimization Techniques, pp. 1146-1145, 2016.
- Saad Hassan Kiani, Khalid Mahmood, Umar Farooq Khattak, Burhan-Ud-Din and Mehre Munir, “U Patch Antenna using Variable Substrates for Wireless Communication Systems”, International Journal of Advanced Computer Science and Applications, Vol. 7, No. 12, pp. 286-291, 2016.
- Munira Bano, A.K. Rastogi and Shanu Sharma, “Design and Simulation of Microstrip Patch Antenna using Different Substrates”, International Journal of Advanced Research in Computer Engineering and Technology, Vol. 3, No. 11, pp. 3871-3875, 2014.
- Trupti Ingale, Chaitali Ingale, A.A. Trikolikar, Gunjan Rathore and P.C. Latane, “Effect of Different Substrate Material on Performance of H Shaped Patch Antenna”, International Journal of Innovative Research in Computer and Communication Engineering, Vol. 2, No. 11, pp. 1-2, 2014.
- Kolli Venkatrao and S.S. Mohan Reddy, “Design and Performance Analysis of Microstrip Patch Antenna using Different Dielectric Substrates”, International Journal of Electronics and Communication, Vol. 2, No. 11, pp. 26-35, 2014.
- Tilak Mukherjee, P. Venkat Rao, M.V.L. Bhavani and Abhishek Kumar Sinha, “Microstrip Patch Antenna Characteristics using Different Dielectric Substrates”, International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, Vol. 4, No. 5, pp. 3813-3818, 2015.
- Punita Mane, S.A. Patil and P.C. Dhanawade, “Comparative Study of Microstrip Antenna for Different Subsrtate Material at Different Frequencies”, International Journal of Emerging Engineering Research and Technology, Vol. 2, No. 9, pp. 18-23, 2014.
- A.A. Qureshi, M.U. Afzal, T. Taqueer and M.A. Tarar, “Performance Analysis of FR-4 Substrate for High Frequency Microstrip Antennas”, Proceedings of China Japan Joint Microwave Conference, 2011.
- Kiran Jain and Keshav Gupta, “Different Substrates use in Microstrip Patch Antenna-A Survey”, International Journal of Science and Research, Vol. 3, No. 5, pp. 1802-1803, 2014
- Chidre Sagar Ram and V.M. Dhede, “Gain Improvement Techniques for Rectangular Microstrip Patch Antenna for different Frequencies”, International Journal of Advance Research and Innovative Ideas in Education, Vol. 2, No. 4, pp. 475-480, 2016.
- Pradeep Kumar Sharma, Ritesh Saraswat and Jitendra Jangir, “Performance Analysis of Square Shaped Microstrip Patch Antenna for S Band Application”, International Journal of Modern Trends in Engineering and Research, Vol. 03, No. 10, pp. 123-127, 2016.
- R. Prasad Rao, Budumuru Srinu and C. Dharma Raj, “Design and Analysis of Multi Substrate Microstrip Patch Antenna”, Microelectronics, Electromagnetics and Telecommunications, Vol. 372, pp. 733-739, 2015.
- "Material Problems in the Manufacture of Power Plant Boilers"
Abstract Views :290 |
PDF Views:0
Authors
R. Kumar
1
Affiliations
1 Projects Dept., AGG-Vickers-Babcock Ltd., IN
1 Projects Dept., AGG-Vickers-Babcock Ltd., IN
Source
Journal of the Association of Engineers, India, Vol 50, No 3-4 (1975), Pagination:Abstract
The severity of duty of the steam generator, particularly, in the utility industry, has increased beyond proportions in the last two decades. While the cycle conditions have become very ardous with very high pressures, temperatures and evaporations, the quality of fuels, be it coal or oil, has been subjected to a steady deterioration. This much of progress would not have been possible'had the development of new materials by the metallurgists not kept on equal pace.- Study on Weldability of EN 10025-6 S550 QT Steel
Abstract Views :467 |
PDF Views:5
Authors
Affiliations
1 Engineering Workshop, Larsen & Toubro Limited, IN
2 Larsen & Toubro Limited, IN
1 Engineering Workshop, Larsen & Toubro Limited, IN
2 Larsen & Toubro Limited, IN
Source
Indian Welding Journal, Vol 51, No 4 (2018), Pagination: 86-92Abstract
Cracks developed in the 90 mm thick EN 10025-6 S550 QT steel plates assembled to form a box unit. After assembly the surface cracks generated longitudinally along the elongated grains while preheating or performing ischolar_main run. Root cause analysis was conducted to investigate the reason for the failure and also how to specify the “conditions of materials on delivery” during procurement is generated. Various tests such as visual test, chemical composition, inclusion rating, microstructure, dye penetrant test and hardness tests were conducted. The investigation revealed that the failure cracks could be due to temper embrittlement due to the segregations of impurities such as tin, arsenic, phosphorus and antimony, etc. in the grain boundaries and resulted in ductile to brittle transformation when exposed in the temperature. It is observed that, depends on the concentration of Ti and N in steel, coarse and cuboidal TiN particles of several micrometers in size act as potential sites for cleavage crack initiation. Furthermore, during the steel making process if sulfur is not properly controlled, then large MnS inclusions can also form during solidification. Soft MnS inclusions elongate during the subsequent hot rolling process, which deteriorate ductility and impact toughness. Hence, it is essential to specify the J factor value and inclusion rate during the procurement of steel.Keywords
Inclusion Rate, Welding, Quenched Hardened Steel, Tempering, J-factor.References
- Anmark N, Karasev A and Jonsson PG (2015); The effect of different non-metallic inclusions on the machinability of steels, Materials 8, pp. 751-783. doi:10.3390/ma 8020751.
- Grosse-Wordemann J and Dittrich S (1983); Prevention of temper embrittlement in 21/4 Cr-1 Mo weld metal by metallurgical action, Welding Journal, 10(5) pp. 123s 128s.
- American Society for Metals, Volume 4.
- Reflection and Transmission Coefficients at the Boundary Surface of Micropolar Viscothermoelastic Solids With Two Temperatures
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Authors
Affiliations
1 Department of Mathematics, Kurukshetra University, Kurukshetra, Haryana, IN
2 Department of Mathematics, M. M. University, Mullana, Haryana, IN
1 Department of Mathematics, Kurukshetra University, Kurukshetra, Haryana, IN
2 Department of Mathematics, M. M. University, Mullana, Haryana, IN
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Research Journal of Science and Technology, Vol 9, No 3 (2017), Pagination: 323-338Abstract
The present investigation is concerned with effects of distinct conductive and thermodynamic temperatures on reflection and transmission cofficients at an interface of two different micropolar viscothermoelastic solid half spaces. Reflection and transmission phenomenon of plane waves impinging obliquely at a plane interface between two different micropolar viscothermoelastic solid half spaces with two temperatures are investigated in the context of Green-Lindsay (G-L) theory (1972). The incident wave is assumed to be striking at the plane interface after propagating through one of the micropolar viscothermoelastic solid with two temperatures. Amplitude ratios of the various reflected and transmitted waves are obtained in closed form and it is found that these are function of angle of incidence, frequency and are affected by the micropolar, viscoelastic properties of the media. Viscosity effects are shown on these amplitude ratios for a specific model. Results of some earlier workers have also been deduced from the present investigation.Keywords
Micropolar Viscothermoelastic Solid, Conductive and Thermodynamic Temperatures, Elastic Waves, Reflection Coefficient, Transmission Coefficient.References
- Ailawalia. P, Sachdeva. S.K, Pathania. D.S (2017)Plane strain problem in a rotating Microstretch thermoelastic solid with microtempratures.- Theoretical and Applied Mechanics volume 44(2017)Issue1,51-82
- Brune J.N. (1970): “Tectonic stress and the spectra of seismic shear waves from earthquakes”. - J Geophys Res, vol.75, pp.4997-5009.
- Eringen A.C. (1967):’’ Linear theory of micropolar viscoelasticity”. - Int. J. Eng. Sci., vol.5, pp.191-204.
- Eringen A.C. (1970): Foundations of micropolar thermoelasticity[M].- Course of Lectures, No.23, CISM Udine, Springer, Berlin.
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- Green A.E. and Lindsay A.K. (1972).“Thermoelasticity”. Journal of Elasticity,2, pp.1-7.
- Kumar R. (2000): Wave propagation in micropolar viscoelastic generalized thermoelastic solid. - Int. J. Eng. Sci., vol.38, pp.1377-1395.
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- Manole D. (1988): Theoreme d'unicite dans la theorie de la viscoelasticite lineaire avec microstructure en utilisant la transformation de Laplace -. Rev. Roumaine Sci. Tech. Ser. Mee. Appl., vol.33, pp.209-214.
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- thman and Ezaira (2016):Two temperature generalized thermoelastic rotating medium-Journal of Science and Engineering Research 3(5) pp-10-25
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- Yaqin Song, Hongyu Xu and Yuanchong Zhang (2006): Reflection and refraction of micropolar magneto-thermoviscoelastic waves at an interface between two micropolar viscoelastic media. - International Journal of Thermophysics, vol.27, pp.970-993.
- Optimization of Application Techniques for Quenched and Tempered Steel-S550Q
Abstract Views :552 |
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Authors
Affiliations
1 Engineering Workshop, Larsen & Toubro Limited, Kanchipuram, IN
2 DGM-Larsen & Toubro Limited, Kanchipuram, IN
3 DGM-L&T Construction, Larsen & Toubro Limited, Kanchipuram, IN
1 Engineering Workshop, Larsen & Toubro Limited, Kanchipuram, IN
2 DGM-Larsen & Toubro Limited, Kanchipuram, IN
3 DGM-L&T Construction, Larsen & Toubro Limited, Kanchipuram, IN
Source
Indian Welding Journal, Vol 52, No 2 (2019), Pagination: 35-43Abstract
EN10025-6 S550Q is high strength steel classified under quenched and tempered (Q&T) manufacturing technique. S550Q is specially designed and used by the authors for welded steel structures for the purpose of heavy lifting and lowering. The entire processing techniques like cutting, edge preparation, welding, and bending are of major importance to the consistency of fabricated structure. This study comprises of introduction to HSS-S550Q and addresses various important variables by practically. The following main factors are taken to consideration heat input during cutting, edge preparation, and welding, cooling cycle, Hydrogen induced cracking (HIC). Stress Relieving (SR) is mandatory after weld fabrication. The first was to establish a need for SR to achieve desirable weldment properties. SR has been reported to have Complementary benefits such as tempering of WM and HAZ regions, and allowing the effusion/diffusion of hydrogen away from the weld region. Bend testing of cross-weld samples was used to qualify the ductility of the weldment before and after SR. In addition, impact, tensile and hardness properties, microstructures were quantified before and after SR.Keywords
S550Q, EN 1011-2, Thermal Cutting, Welding, Stress Relieving, ASME SEC-IX (2015), EN ISO15614.References
- Basu B and Raman R (2002); Microstructural variations in a high-strength structural steel weld under isoheat input conditions, Welding Journal, 81, pp. 239- 248.
- Porter D (2006); Development in hot-rolled high-strength steel, Nordic Welding Conference 06 on New Trends in Welding Technology, Tampere, Finland.
- Pisarski HG and Dolby RE (2003); The significance of softened HAZs in high strength structural steels, Welding in the World, 47(5/6), pp. 32-40.
- Umekuni A and Masubuchi K (1997); Usefulness of under matched welds for high-strength steels, Welding Journal, 76(7), pp. 256-263.
- Wang J, Li Y and Liu P (2003); Effect of weld heat input on toughness and structure of HAZ of a new super-HSS, Material Science, 26(3), pp. 301-305.
- Magudeeswaran G, Balasubramanian V, Madhusudhan Reddy G and Balasubramanian TS (2008); Effect of welding processes and consumables on tensile and impact properties of high strength quenched and tempered steel joints, Journal of Iron and Steel Research International, 15, pp. 87-94.
- Shi Y and Han Z (2008); Effect of weld thermal cycle on microstructure and fracture toughness of simulated heat-affected zone for a 800 MPa grade HSS, Journal of Materials Processing Technology, 207, pp. 30-39.
- Solasodine:A Perspective on their roles in Health and Disease
Abstract Views :328 |
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Authors
Affiliations
1 Kamla Nehru Institute of Management and Technology, Sultanpur, IN
2 Integral University, Lucknow 226026, IN
1 Kamla Nehru Institute of Management and Technology, Sultanpur, IN
2 Integral University, Lucknow 226026, IN
Source
Research Journal of Pharmacy and Technology, Vol 12, No 5 (2019), Pagination: 2571-2576Abstract
Steroidal glycoalkaloids, a category of glycosidic ingradients are originated from nitrogen-containing steroids. Structurally it includes of C27 cholestane skeleton to that 1 to 5 sugar moieties are hooked up at the 3-OH region of the aglycone part. Solasodine, in most of the solanaceous plants occurs as an aglycone a region of glycoalkloids, like solasonine, solamargine etc. Solasodine is employed as a hormone precursor within the steroid drug business for the manufacturing corticosteroids, anabolic steroids, antifertility drugs etc. Isolated Solasodine from solanum plants exploits its medicinal properties such as anticonvulsant, CNS depressant, antioxidant, cytotoxic, antinociceptive, anti-inflammatory, hepatoprotective, immunomodulatory, antiatherosclerotic, antimicrobial, and antiobesity activity, etc. In acut toxicity study, LD50 of Solasodine was found to be 1500 mg/kg after intraperitoneal administration and 2000 mg/kg, after oral administration in rats. Present review has set about to bring updated information regarding to pharmacological activities of solasodine, which may be helpful to researchers to explore a new bioactive molecules for various therapeutic application.Keywords
Solasodine, Spiroketal, Steroidal Glycoalkaloids, Pharmaco-therapeutics.References
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- Critical Zone:An Emerging Research Area for Sustainability
Abstract Views :519 |
PDF Views:183
Authors
Paras R. Pujari
1,
V. Jain
2,
V. Singh
3,
K. Sreelash
4,
S. Dhyani
1,
M. Nema
5,
P. Verma
1,
R. Kumar
1,
S. Jain
5,
M. Sekhar
6
Affiliations
1 CSIR-National Environmental Engineering Research Institute, Nagpur 440 020, IN
2 Department of Earth Sciences, Indian Institute of Technology, Gandhinagar 382 355, IN
3 Department of Geology, Delhi University, New Delhi 110 007, IN
4 National Centre for Earth Science Studies, Thiruvananthapuram 695 011, IN
5 National Institute of Hydrology, Roorkee 247 667, IN
6 Indian Institute of Sciences, Bengaluru 560012, IN
1 CSIR-National Environmental Engineering Research Institute, Nagpur 440 020, IN
2 Department of Earth Sciences, Indian Institute of Technology, Gandhinagar 382 355, IN
3 Department of Geology, Delhi University, New Delhi 110 007, IN
4 National Centre for Earth Science Studies, Thiruvananthapuram 695 011, IN
5 National Institute of Hydrology, Roorkee 247 667, IN
6 Indian Institute of Sciences, Bengaluru 560012, IN
Source
Current Science, Vol 118, No 10 (2020), Pagination: 1487-1488Abstract
In the era of Anthropocene, characterized by a dramatic increase in anthropogenic pressure, global changes are challenging the capacity of planet Earth to sustain the development of human societies in the long term. In the past two decades, this concern has fostered worldwide efforts to develop integrated studies of the ‘critical zone’ (CZ), the outer skin of the Earth, extending from the canopy top to the bottom of the aquifer, hosting the continental biosphere and providing basic human needs such as water, food, energy and ecosystem services1 . Environmental processes within the CZ, such as energy and mass exchange, formation of soil, streamflow and evolution of landscape are critical to sustain biodiversity as well as humanity 2,3 . However, with rapid socio-economic development, the CZ is subjected to increasing stress from anthropogenic forcings such as the growth in human and livestock populations, increase in land use, global environmental changes, and expanding consumption patterns4 . The expanding needs for sustainable development call for understanding, predicting and managing the complexity as well as dynamics within the CZ and to study its feedback with other compartments of the environmental systems5,6 . The main challenge faced by the CZ research is to integrate effectively the multiple disciplines at stake, from geosciences, biological sciences, ecology, hydrology, soil science to social sciences, working within a wide range of temporal and spatial scales7,8 . The interdisciplinary and multiscale study of terrestrial ecosystem processes can be best addressed by critical zone observatories (CZOs), where domain experts across different disciplines study various aspects of the CZ. This will lead to holistic understanding of complex systems 8 .Full Text
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