Abstract

In the field of active perception, object search is a widely studied problem. To search for an object in large rooms, it would be expensive to explore and check each object's similarity with the object of interest. The expense could uncontrollably bloat as the number of objects to be searched increases. If the objects are of the order of a 2-5cm, they appear very small, making it difficult for the present algorithms to recognize them. A general human strategy in such cases is to sparsely identify, from far away (4-6m), if the object of interest is present in the scene. Subsequently, each of the possible objects is analysed from closer proximity to recognize, for further manipulation. In this work, we present a similar framework. We reduce search-space, by identifying existential probability of a small object from a distance followed by a closer 3-D analysis of its point cloud to accurately recognize it. This is achieved by 2-D modelling of the objects using Gaussian Mixture Models followed by recognizing objects using efficient RGB-Depth based algorithm.

Abstract

Channel bonding is a mechanism deployed to synchronize serial communication channels of higher data rate and bandwidth applications. Application that demands higher bandwidth, for example 400G Ethernet, it is not possible to achieve such massive rate using single high speed serial IO channel and aggregating multiple communication-links as a single communication channel makes such ultra-high speed realizable. One challenge that is faced in aggregating communication links is elimination of serial data skew introduced by non-identical trace length of the serial links. Various techniques exist to de-skew lanes in the receive side of the high speed serial transceiver. This paper presents a novel approach to channel bonding that optimizes area, power, initialization time and yields better performance. The idea discussed here is based on a delay based model and explores the possibility of performing channel bonding in a centralized way rather than a distributed way.

Abstract

This paper explains the importance of the role played by photon lifetime in the generation of terminal voltage across Semiconductor Ring Laser Gyroscope (SRLG). This terminal voltage can be used for direct measurement of rotation rate.

Abstract

Saturation area E and porisity paramenter using new data set recorded by the Gujarath sesmic network of India.

Abstract

day by day increasing cost of vehicle transport service for petrolium product, made pipeline as more affordable mean

Abstract

Ports are lifeline systems that function as storage and maintaning facility for the transport of cargos. The port structures are frequently exposed to failure under

Abstract

The overall capacity of a structure depends on the strength and deformation capacity of the individual components of the structure. This paper deals with the prediction of effect of a member on global performance of the structure. The performance of a 5 storey RC frame, designed for Indian standard codes has been presented. Non linear pushover analysis is used to draw the capacity curve. During the pushover analysis when the structure becomes unstable, the failed members are identified. In the present study, end columns of the bottom storey which exists in failed members are strengthened by increasing the longitudinal reinforcement, increasing the c/s area and reducing the shear reinforcement spacing. Increase of longitudinal reinforcement or decrease of shear reinforcement spacing not effected much the strength capacity, but the ductility is increased in both the cases. Increasing the c/s area of two columns increased the strength and stiffness of the frame, but the ductility is increased up to a certain limit and then decreased. Parametric study also done for individual column performance with same geometric and material properties as it exists in the frame. The performance of individual column is completely different with frame performance though the geometric and material properties are same this is because of the frame action where redistribution of forces takes place when the member fails in the frame.

Abstract

The earthquake resistant design of structures according to the existing design philosophy aims to ensure that during their lifetime, the structures resist the maximum possible earthquake without collapse. This philosophy ignores the fact that for the allowable damage at the end of the design life, it is necessary to account for the seismicity of the area in a comprehensive manner i.e., in terms of magnitudes with proper spatial distributions around the site. It is also necessary to estimate damage due to each of these events and also cumulative damage till date. Such a procedure is proposed in the paper and it is applied to heritage structures which stand for longer duration compared to ordinary buildings. As a case study, the proposed methodology is used to evaluate damage to Golkonda Fort located in Zone II according to IS 1893-2002. Proposed approach is based on the estimation of Power spectral density function (PSDF) of earthquakes already occurred and then estimation of damage to the structure during each of these events. Golkonda Fort is modeled using Applied Element Method (AEM). Pushover analysis of the AEM model is also carried out. The damage computed from the proposed approach is plotted on the fragility curve obtained from the push over analysis for comparison.

Abstract

In recent years, the introduction of Pre Engineered Building (PEB) concept in the design of structures has helped in optimizing design. The adoptability of PEB in the p lace of Conventional Steel Building (CSB) design concept re sulted in many advantages, including economy and easier fabricatio n. In this study, an industrial structure (Ware House) is analyzed an d designed according to the Indian standards, IS 800&1984, IS 800&2007 and also by referring MBMA&96 and AISC&89. In this study, a structure with length 187m,width 40m,with clear height 8m and havi ng R&Slope 1:10,isconsidered to carry out analysis& design for 2D frames (End frame, frame without crane and frame with 3 module cranes). The economy of the structure is discussed in terms of i ts weight comparison, between Indian codes (IS800&1984, IS800 &2007) & American code (MBMA&96), & between Indian codes (IS 800&1984, IS800&2007).

Abstract

The pipeline systems are commonly used to transport water, sewage, oil, natural gas and other materials world over. These pipelines run over long distances and in some instances they cross high seismic areas including fault crossings. Many buried pipelines in India run through high seismic areas and are exposed to considerable seismic risk. These pipelines should be designed in such a way that they remain functional even when they are subjected to high intensity earthquake shaking. This paper illustrates the performance of one of the high pressure gas pipeline in the state of Gujarat, under the fault movement. Analysis shows that the burial depth of pipeline should be minimized in the fault zones in order to reduce soil restrain on the pipeline during fault movement.