Effect of temperature on fatigue crack propagation under constant amplitude loading
The present study relates to fracture mechanics and its aim is to find the effect of temperature on fatigue crack propagation under constant amplitude loading. The thermo-mechanical uniaxial and biaxial-planar fatigue behavior of the structural steel was investigated for constant amplitude loading at room temperature and between temperature range 673K and 923K. A fatigue analysis has been done for cruciform specimen using ANSYS 15.0 to find out the crack propagation and life of the material at different temperatures. A comparative study between the results obtained from ANSYS 15.0 and experimental results has been done to validate our analysis. A change from a mainly transgranular fracture at 673K to a mostly intergranular fracture at 923K was found under thermo-mechanical fatigue loading. Effect of temperature on crack propagation is presented which gives the best life prediction.
Published by: Dharm Raj, Sateesh Kumar Singh
Author: Dharm Raj
Paper ID: V4I4-1296
Paper Status: published
Published: July 31, 2018
Medium Access Control and Quality-of-Service Routing for Mobile Ad Hoc Networks
A mobile ad hoc network is an autonomous system consisting solely of mobile terminals connected with wireless links. This type of network has received considerable interest in recent years due to its capability to be deployed quickly without any fixed infrastructure. Nodes self-organize and re-con gure as they join, move, or leave the network. How to design distributed protocols capable of handling the dynamic nature of these networks is an interesting but di cult topic. When TDMA is used, distributed protocols are needed to generate transmission schedules. An important issue is how to produce a schedule quickly. This is critical when the network is large or the network changes frequently. Here we develop two fully distributed protocols for generating or updating TDMA schedules. The contention is incorporated into the scheduling protocols for them to work independently of the network size. The schedule can be generated at multiple parts of the network simultaneously. In the Five-Phase Reservation Protocol (FPRP), a broadcast schedule is produced when nodes contend among themselves using a new ve-phase message exchange mechanism. In the Evolutionary-TDMA scheduling protocol (E-TDMA), schedules are updated when nodes contend to reserve transmission slots of different types (unicast, multicast, broadcast). Both are scalable protocols suitable for large or dynamic networks. Another issue related to medium access control is transmission power control. Our contribution to power control is to develop a channel probing scheme for networks applying power control, which allows a node to probe a channel and estimate the channel condition. It can be used for dynamic channel allocation in a TDMA or FDMA system or admission control in a DS/CDMA system. It is a fully distributed scheme which requires little communication overhead. Multiple links can probe a channel simultaneously and each makes individual yet correct decisions. The last topic is Quality-of-Service routing. The ancient distributed scheme is developed to calculate the end-to-end bandwidth of a route. By incorporating this scheme with the AODV protocol, we developed an on-demand QoS routing protocol which can support CBR sessions by establishing QoS routes with reserved bandwidth. It repairs a route when it breaks. Load balancing and route redundancy are also achieved. It is applicable for small networks or short routes under relatively low mobility.
Published by: Kumar Kishan Chandra, Dr. Anand Kumar Pandey, AnuPriya
Author: Kumar Kishan Chandra
Paper ID: V4I4-1253
Paper Status: published
Published: July 31, 2018
Design of 6-Axis robotic arm
There has been an increase in the use of a robotic arm in various commercial and non-commercial sectors such as production, electronics, healthcare and assembly lines. Majorly robotic arm is used in assembly lines due to human restriction in that area. The aim of this project is the design of stationary 6-axis robotic arm for pick and place operation. For reducing the cost of stepper motors, we have achieved the speed reduction. The main context of this paper is the design of 6-axis robotic arm resembling a human arm consisting of manipulators performing various motions including pitching, rolling and yawing. The robotic arm is developed using software V-Rep for its efficient usage in Torque calculations and simulation
Published by: Abhishek Bhambere
Author: Abhishek Bhambere
Paper ID: V4I4-1393
Paper Status: published
Published: July 31, 2018
Polymorphs of silica in the form of white pebbles detected at Lonar Crater, Maharashtra, India
For the first time polymorph of silica in the form of white colored pebbles of spherical and elongated shapes has been detected at Crater Lake and ejecta, on a large scale which was investigated in a course of research to understand its characteristic features. Elemental composition and oxides of these pebbles through XRF analysis showed Silica (SiO₂), to be 97.985 mass % with negligible quantities of CaO, Fe₂O₃, SO₃, Al₂O₃, and Cr₂O₃. Physicochemical analysis carried out showed that these pebbles are not related to salinity or alkalinity. The high content of SiO₂ (Silica), showed that it is a polymorph of silica. Findings of silica pebbles at Lonar Crater have not been reported by earlier workers. The formation of silica pebbles is related to Lake water. Formation of silica pebbles and the presence of diatoms in the lake water indicate that the lake water contains a high percentage of SiO₂, the source of which is unknown. Pebbles are generally found near river beds or near the seashores. For which lotic water body is responsible. These pebbles contain a high percentage of CaO. Findings of large quantity of silica pebbles at Lonar crater in which SiO₂ is 98% mass, this is unusual because white pebbles containing high percentage of CaO is known, but white pebbles containing high percentage of silica (SiO₂) is unknown and has not been reported from any of the volcanic eruption sites nor has it been reported from any of the meteorite impact crater sites either, also these silica pebbles are not found in large quantity on the earth surface. Silica pebbles being a rich source of silica and found in abundance here, an industry of making glass beads may have flourished here in the 14th century. This part has not been explored in the past and is a preliminary investigation, this paper reports the first-hand information of findings of silica pebbles, a polymorph of silica and to put on record the findings. A standardless approach has been adopted.
Published by: Jadhav Raju D, Mali Harishchandra B.
Author: Jadhav Raju D
Paper ID: V4I4-1381
Paper Status: published
Published: July 31, 2018
Performance evaluation of request processing time using different service broker policies in Cloud computing
The construct of cloud computing has not only remolded the field of the distributed system but also essentially changed how business potentiality expands today. In late furtherance, cloud computing applications allow for as servicing to end- users. The applications services hosted under Cloud computing role model have composite provisioning, configuration, and deployment essentials. How to utilize Cloud computing resources expeditiously and attain the uttermost winnings and efficient use of resources is one of the Cloud computing service supplier ultimate goals. Repetitious valuation of the performance of Cloud provisioning policies, application workload framework, and resources performance frameworks in the active system is difficult to accomplish and instead a time consuming and costly approach. To defeat this challenge, cloud analyst simulator based on CloudSim has been projected which enables the modeling and simulation in the cloud atmosphere. The aim of this paper is to prove that the choice of VM Scheduling Policy in Cloud computing framework importantly improves the application performance under resource and service demand fluctuation. Hence We will discuss different Virtual machine(VM) Scheduling Policies implemented and their performance analysis in the virtual environment of cloud computing in order to achieve better Quality of Service(QoS).
Published by: Diksha Devi, Gautam Arora
Author: Diksha Devi
Paper ID: V4I4-1391
Paper Status: published
Published: July 31, 2018
Public health expenditure: A case study of Madhya Pradesh
Health plays an important role in the social scenario. Hence, it plays an important role in the social and economic development. The expenditure on the social sector is quite less than the expenditure on economic sector and due to this, the health sector which is an important component of the social sector has been affected. In order to develop the health sector, there is a need for restructuring this sector. The fund flows in the health sector very less from the central government and the state governments whereas maximum fund flows come from private sectors due to which the private health services are not that affordable. The health expenditure as a percentage of GDP is quite less which needs to be enhanced. The condition of the health sector in the state of Madhya Pradesh is also not up to the mark due to the lack of allocation of adequate funds.
Published by: Dr. Anjali Jain, Runa Paul
Author: Dr. Anjali Jain
Paper ID: V4I4-1378
Paper Status: published
Published: July 31, 2018
