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Hamirpur, India

The National Institute of Technology Hamirpur is a public engineering college located in Hamirpur, Himachal Pradesh, India. It is one of the thirty National Institutes of Technology established, administered and funded by Government of India. It conducts undergraduate and postgraduate programmes in Engineering and Architecture and Doctor of Philosophy programme in Engineering, Pure Science and Humanities. Wikipedia.

Bansal V.K.,National Institute of Technology Hamirpur
Journal of Computing in Civil Engineering

Construction activities need space on the jobsite for their execution. Workers, equipment, materials, temporary facilities, and the developing structure share the limited jobsite space during the construction period. Multiple types of spaces for different purposes on various locations are required to execute various activities at different times. Hence, space planning helps provide a safe and productive environment. Planners mentally link two-dimensional (2D) drawings and execution schedules to generate dynamic multiple types of space requirements, which is a complex task. Therefore, researchers suggest the use of four-dimensional (4D) modeling and building information modeling (BIM) for space planning. Both simulate the construction process by linking the execution schedule with a three-dimensional (3D) model to visualize the construction sequence in space planning. However, both still lack features such as topography modeling and geospatial analysis, which affect space planning. In this work, 4D geographic information systems (GIS) were used for space planning that facilitates topographic modeling, different types of geospatial analyses, and database management. GIS was also used to generate multiple types of spaces corresponding to various activities. A feature attribute table (FAT) associated with each space describes when, where, and how long that space will be required on the jobsite. GIS-based area topology was implemented through a set of validation rules that define how working areas have to share the jobsite. A GIS-based methodology that enables space planning, time-space conflict identification, and conflict resolution prior to the construction was developed and implemented. © 2011 American Society of Civil Engineers. Source

Kumar R.,National Institute of Technology Hamirpur | Dhiman S.,National Institute of Technology Hamirpur
Materials and Design

In this paper, an attempt has been made to investigate the specific wear rate of the unreinforced Al 7075 and hybrid aluminum metal matrix composite reinforced with the hard ceramic (7. wt.% of SiC) and soft solid lubricant (3. wt.% of graphite) fabricated by using stir casting method. The unlubricated pin-on-disc wear tests were conducted to examine the wear behavior of the aluminum alloy and its composites. The sliding wear tests were carried out at various loads (20-60. N), speeds (2-6. m/s), and sliding distances (2000-4000. m). It is inferred that specific wear rate of the hybrid composite is lower than that of the unreinforced Al 7075 in all combination of loads, sliding speeds, and sliding distances. The specific wear rate exhibited increasing trend with change of load. However, it is apparent from the result that specific wear rate decreases up to the speed of 4. m/s and then starts increasing. To recognize the mixing of reinforcement, worn surfaces and wear debris tested samples were examined using scanning electron microscope (SEM and EDX) and X-ray diffraction (XRD). Response Surface Methodology (RSM), which is a statistic method has been used to find out the most significant factor, which influence the specific wear rate. Consequently, it is concluded that load is most significant factor which leaves an effect on specific wear rate. Sliding speed and sliding distance provide the secondary contribution to the performance indicator. © 2013 Elsevier Ltd. Source

Kumar D.,National Institute of Technology Hamirpur | Katoch S.S.,National Institute of Technology Hamirpur
Renewable and Sustainable Energy Reviews

Himalayan region is called the 'water tower of Asia'. This 'water tower' is now being harnessed into 'power tower' by many Himalayan countries (China, India, Nepal, Bhutan etc.) in the form of small and large hydropower projects. Himachal Pradesh, located in this region is known as 'power state' of India. The state has developed well framed policies and guidelines for growth of hydropower sector in the state. It has emerged as role model for identification, allotment and harnessing of small hydropower projects not only in India but in the whole Himalayan region. However, in the recent past, the growth of small hydropower projects is not as impressive as predicted. Local natural resources, ecology and livelihood of the local people are being destroyed in the garb of local development and false promises of employment. Benefits of this so called golden harvest are not being transferred to native people as envisaged. This article presents small hydropower development in a global, Indian and Himachal Pradesh perspective. It expresses in detail the current status, policy guidelines, challenges, initiatives taken by state, future scope and suggestions for smooth development of small hydropower projects in this beautiful, hydro rich hilly state of India. It is concluded that framing of policies favoring sustainable development and their effective implementation at grass-root level (involving all stakeholders) can only set the ball rolling for desired pace of small hydropower development in the state. Bringing of small hydropower projects in the ambit of environmental clearance process has also been advocated. © 2014 Elsevier Ltd. Source

Yadav A.K.,National Institute of Technology Hamirpur | Chandel S.S.,National Institute of Technology Hamirpur
Renewable and Sustainable Energy Reviews

Solar radiation data plays an important role in solar energy research. These data are not available for location of interest due to absence of a meteorological station. Therefore, the solar radiation has to be predicted accurately for these locations using various solar radiation estimation models. The main objective of this study is to review Artificial Neural Network (ANN) based techniques in order to identify suitable methods available in the literature for solar radiation prediction and to identify research gaps. The study shows that Artificial Neural Network techniques predict solar radiation more accurately in comparison to conventional methods. The prediction accuracy of ANN models is found to be dependent on input parameter combinations, training algorithm and architecture configurations. Further research areas in ANN technique based methodologies are also identified in the present study. © 2013 Published by Elsevier Ltd. Source

Kumar D.,National Institute of Technology Hamirpur | Katoch S.S.,National Institute of Technology Hamirpur
Renewable and Sustainable Energy Reviews

Any hydropower project whether mega, large or small is to be weighed for sustainability at the time of its inception. Without proper sustainability assessment, the project may face many problems during its construction or/and operational phase(s). Legally also, this aspect has been made mandatory in many countries across the globe to check the feasibility of the project from sustainability point of view beforehand. This study intends to emphasise sustainability of run of the river (RoR) hydropower projects in hydro rich regions of India where these types of projects are being undertaken on a large scale. In addition, this study has compiled a list of sustainability indicators which may be of use for policy makers and designers while planning RoR projects in hydro rich regions of India and similar regions throughout the world. © 2014 Elsevier Ltd. All rights reserved. Source

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