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Banerjee, Amit
- Effect of Head Down Tilt on Hemodynamics in Valve Replacement Surgery Patients
Abstract Views :233 |
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Authors
Affiliations
1 Research Student (Cardiopulmonary) Jamia Hamdard, New Delhi, IN
2 Centre for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia, New Delhi, IN
3 Medical Superintendent, LNJP Hospital, New Delhi, IN
1 Research Student (Cardiopulmonary) Jamia Hamdard, New Delhi, IN
2 Centre for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia, New Delhi, IN
3 Medical Superintendent, LNJP Hospital, New Delhi, IN
Source
Indian Journal of Physiotherapy & Occupational Therapy-An International Journal, Vol 5, No 4 (2011), Pagination: 73-76Abstract
PurposeAfter cardiac surgery 90% of patients show basal atelectasis even on first postoperative day. Removal of secretions in the basal lobes may require the use of head-down positioning i.e. 15-45°.But to position the head down or not still continues to be a dilemma for physical therapist treating the patients with cardiac surgery as it is believed to be hemodynamically unstable for these patients. So the purpose of study is to examine hemodynamic effect after head down tilt in valve replacement patients.
Method30 patients were included in the study on first post operative day. Baseline reading of variables i.e. heart rate, systolic blood pressure, diastolic blood pressure, respiratory rate, and rate pressure product were taken in supine position. After 15 degrees of Head down tilt all the readings of variables were again taken at 1, 5 and 10 min
ResultExcept heart rate there was statistically significant increase in systolic blood pressure, diastolic blood pressure, respiratory rate, and rate pressure product post head down tilt.
ConclusionFifteen degrees of head down tilt for 10 min significantly perturbs the cardiovascular system but no detrimental effect of head down tilt (HDT) was observed on cardiovascular system.
Keywords
Hemodynamics; valve replacement surgery; head down tilt.
- Pellatispira-Bearing Upper Eocene Subcrops in Tanot-I Well, Northwest of Jaisalmer, Rajasthan and their Significance
Abstract Views :231 |
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Authors
Affiliations
1 Department of Geology, University of Delhi, Delhi 110 007, IN
1 Department of Geology, University of Delhi, Delhi 110 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 38, No 1 (1991), Pagination: 76-81Abstract
Late Eocene strata bearing Pellatispira crassicolumnata, Silvestriella tetrahedra, Nummulites fabianii, Nummulites striatus and Asterocyclina stellata have been identified in the subsurface samples from Tanot-I well 145 km northwest of Jaisalmer Earlier in the Rajasthan region, the sea was considered to have finally withdrawn by the Late-Middle Eocene. The present record of strata of Late Eocene age supports the hypothesis of oceanic subduction followed by obduction of the Indus Basin. The presence of Late Eocene in Kirthar and Sulaiman Ranges, Pakistan, and Jaisalmer, India and their absence in Kutch can thus be explained.Keywords
Pellatispira, Eocene, Jaisalmer, Rajasthan.- Effect of Machining Condition on Surface Roughness and Hardness in Milling of AA6061 Aluminium Alloy
Abstract Views :215 |
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Authors
Affiliations
1 Kalyani Govt. Engineering College, Kalyani-741235, Nadia, West Bengal, IN
2 Regent Education and Research Foundation, Barrackpore-700121, North 24 Parganas, West Bengal, IN
3 JIS College of Engineering, Kalyani-741235, Nadia, West Bengal, IN
1 Kalyani Govt. Engineering College, Kalyani-741235, Nadia, West Bengal, IN
2 Regent Education and Research Foundation, Barrackpore-700121, North 24 Parganas, West Bengal, IN
3 JIS College of Engineering, Kalyani-741235, Nadia, West Bengal, IN
Source
Indian Science Cruiser, Vol 36, No 1 (2022), Pagination: 39-43Abstract
Roughness of a machined surface should be as par the customer requirement to suite a particular application. For achieving the desired surface finish, appropriate values of cutting velocity, feed and depth of cut are to set, and these can be found out utilizing an optimization technique. In this study, the machining process is executed on AA6061 aluminium alloy by appling cutting fluid in a CNC milling machine and then roughness of surface and hardness are measured by a surface roughness tester and Brinell hardness tester respectively.Keywords
Cutting Velocity, Feed, Depth of Cut, Aluminium, Surface Roughness, Hardness.References
- A B Chattopadhyay, Machining and Machine Tools, Willey India Pvt. Ltd., New Delhi, India, 2012.
- https://en.wikipedia.org/wiki/Surface_roughness Accessed on 11.11.2018.
- S V Alagarsamy, of Influence of Turning Process Parameters on MRR & Surface Roughness Of AA7075 Using Taguchi’s Method and RSM, International Journal of Applied Research and Studies, Vol 3, page 1-8, 2014.
- R Thamma, Comparison Between Multiple Regression Models to Study Effect of Turning Parameters on the Surface Roughness, Proceedings of the 2008 IAJC-IJME International Conference, Nashville, USA,2008.
- H M Somashekara, Optimizing Surface Roughness In Turning Operation Using Taguchi Technique and ANOVA,International Journal of Engineering Science and Technology, Vol 04, page 1967- 1973, 2012.
- M S Kumar, Optimization of Micro Milling Parameters of Al-6082 by ANOVA Methodology, Internal Journal of Mechanical Engineering and Robotics Research (IJMERR), Vol 3, page 2278 – 0149, 2014.
- A Chaudhary, Optimization of Machining Parameters Affecting Surface Roughness of Al6082 in Dry End Milling Operation On VMC, International Research Journal of Engineering and Technology, Vol 04, page 82-89, 2017.
- M S Najiha, Modeling of The End Milling Process for Aluminium Alloy Aa6061t6 Using HSS Tool, International Journal of Automotive and Mechanical Engineering, Vol 8, page 1140-1150, 2013.
- I Asilturk, Multi Response Optimization Of CNC Turning Parameters Via Taguchi Method-Based Response Surface Analysis, Measurement, Vol45, page 785-794, 2012.
- A Bhattacharya, Estimating the Effect of Cutting Parameters on Surface Finish and Power Consumption During High Speed Machining of AISI 1045 Steel Using Taguchi Design and ANOVA, Production Engineering Research and Development, page 31-40, 2009.
- An Investigation on Machinability during Turning Al-Mg2Si-Si Composite in Dry Condition
Abstract Views :231 |
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consideration with varying cutting tools. Latin square method is applied to find out
the effect of cutting velocity, feed as well as insert type onto force requirement.
Results show that in relatively high cutting velocity range, feed has significant effect
on forces. Under 60 –75 m/min cutting velocity with 0.06-0.08 mm/rev feed, good
machinability is obtained, and hence, these cutting conditions may be recommended
for application in the industry.
Authors
Affiliations
1 Department of Mechanical Engineering, Hooghly Engineering & Technology College, Hooghly- 712103, IN
2 Department of Mechanical Engineering, Kalyani Govt. Engineering College, Kalyani- 741235
3 Department of Mechanical Engineering, Kalyani Govt. Engineering College, Kalyani- 741235, IN
4 Indian Institute of Science Bangalore, Bengaluru- 560012, IN
1 Department of Mechanical Engineering, Hooghly Engineering & Technology College, Hooghly- 712103, IN
2 Department of Mechanical Engineering, Kalyani Govt. Engineering College, Kalyani- 741235
3 Department of Mechanical Engineering, Kalyani Govt. Engineering College, Kalyani- 741235, IN
4 Indian Institute of Science Bangalore, Bengaluru- 560012, IN
Source
Indian Science Cruiser, Vol 36, No 3 (2022), Pagination: 13-21Abstract
In this work, machinability study during turning of Al-Mg2Si-Si is taken intoconsideration with varying cutting tools. Latin square method is applied to find out
the effect of cutting velocity, feed as well as insert type onto force requirement.
Results show that in relatively high cutting velocity range, feed has significant effect
on forces. Under 60 –75 m/min cutting velocity with 0.06-0.08 mm/rev feed, good
machinability is obtained, and hence, these cutting conditions may be recommended
for application in the industry.
Keywords
Machining, turning, Al-Mg2Si-Si, cutting force, machinability, cutting toolReferences
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- S Zhiqiang, D Zhang and Li Guobin, Evaluation of dry sliding wear behavior of silicon particles reinforced aluminum matrix composites, Materials & design, Vol 26, No 5, page 454-458, 2005.
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- J Qingxiu, Z Caixia and H Xiaodong, Study on in-situ Mg2Si/Al-Si composites with different compositions, Research & Development, page 133-136, 2009.
- S Kumar, P Das, S K Tiwari, M K Mondal, S Bera, H Roy and S K Samanta, Study of Microstructure Evolution during Semi-Solid Processing of an In-Situ Al Alloy Composite, Materials and Manufacturing Processes, vol 30, page 356–366, 2015.
- C Li, Y Y Wu, H Li and X F Liu, Morphological evolution and growth mechanism of primary Mg2Si phase in Al–Mg2Si alloys, Acta Materialia, Vol 59, No 3, page 1058-1067, 2011.
- M A U Patwari, A K M N Amim and W F Faris, Prediction Model of Cutting Force by Cutting Parameters Using Response Surface Methodology in Milling of Steel AISI1020, Competitive Manufacturing– Proceeding of the 2nd International and 23rdAll India Manufacturing Technology, Design and Research Conference, IIT Madras, page 791- 797, 2008.
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- Y S Negi, V P Dutta and P P Marwaha, Optimisation of Cutting Parameters on NC Machine for Precision Milling of Aluminium Alloy (24345) with Carbide End Mills,18th All India Manufacturing Technology, Design and Research Conference, IIT Kharagpur, page 231-237, 1998.
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