Indexing

Abstract:Unsignalized intersections are the bottleneck points of any traffic network, generally found in different traffic conditions. They are mostly a cause for accidents at intersections especially in a country like India where the traffic rules are not strictly obeyed. Capacity of the intersection is required to be calculated to ensure a smooth flow of traffic with minimum conflicts. The study area selected for the analysis was CCD cross roads near Shyamal in Satellite area of Ahmedabad. Analysis has to be done by collecting Traffic Volume data to determine the number, movements, and classifications of roadway vehicles. These data help identify critical flow time periods, the effect of large vehicles or pedestrians on vehicular traffic stream, level of service of intended facility.
Signal timing is a technique used by traffic engineers to find the right-of-way at an intersection. Signal timing involves deciding allocation of green time at an intersection approach, the pedestrian walk signal, and various other factors. There are different methods for signal design. Webster’s method of signal design is simple, reliable and based on formulae introduced by Webster. In this method, the total cycle length of the signal is determined which results in minimum delay at the intersection.
Keywords:unsignalized, intersection, signal design, cycle length, saturation flow, delay.

Abstract:This paper reviews literature systematically using roof ponds on passive heating and cooling of buildings. The key goals were to obtain a detailed understanding of the different roof pond models and their performance, compare the effectiveness of different roof pond variants, assess the performance of different roof pond variants in relation to other passive design techniques, explore the impact of climatic conditions and different design configurations on roof pond performance and identify knowledge gaps. Overall, it identified 19 roof pond cooling systems and 4 roof pond heating systems. In some cases, this review suggests that roof ponds can provide thermal comfort throughout the year while reducing the demand for active heating and cooling systems.  They can therefore be used to achieve the goal of carbon-neutral design. Roof ponds with wet gunny bags, shaded roof ponds, ventilated roof ponds and mobile insulated roof ponds have been shown to be more efficient compared to other roof pond cooling systems variants. Comparing performance with other passive approaches has shown that roof pond cooling systems are about as efficient in preserving thermal comfort indoors in many cases. The main factors influencing roof pond quality are meteorological conditions, water depth, roof deck content, and insulating panel thickness. There are several areas of weakness identified in the literature. Future research should among other items, provide further detailed knowledge on the quality of all roof pond types, further explore the suitability of roof ponds with respect to other passive design measures, investigate the efficacy of roof ponds when combined with other passive design measures, evaluate the life-cycle costs of roof ponds and provide more knowledge on their genuine-world application. 

Abstract: Over the time, there has been many cases of car accidents mainly due to human factor such as lack of focus, drunk driving, etc. Few futuristic technologies excite the imagination like self-driving vehicles. As we move on to the era of Automated vehicles and Artificial Intelligence (AI) with the help of machine learning the number of accidents are gradually reducing. I have put together some inputs from few sources, and on the deductions based on such inputs, has tried to find out how has made the Automobile Industry of now and how the automated vehicles will influenced the world economies. A glimpse to what our future beholds. From reducing the number of accidents, to improving emissions compliance and easing congestion, driverless cars are claimed to cure a number of ills, and to assess how likely that is, we've already seen trials in various UK locations, including Bristol, Greenwich and Milton Keynes Lasting for 18 to 36 months, these tests have also analyzed the legal and insurance implications of driverless cars.
The IEEE words for autonomous vehicles is “the most promising form of intelligent transportation.” In fact, by 2040, it forecasts these vehicles will account for up to 75 percent of cars on the road.
Keywords:Artificial Intelligence (AI), self-driving cars, self-driving vehicles.

Abstract:composite materials are those materials which are made by combining two or more materials with unique properties. Polymer matrix composites are one of the most important composites which are used in various industries due to their light weight, high stiffness and high strength. Because of its advantages it is important to know the manufacturing techniques of PMCs. PMCs are used by automotive, pharmaceutical, sports and aerospace industries. This paper gives detailed review of different methods of manufacturing Polymer Matrix Composites. These methods are more effective in making special shapes west bullet proofs, boat bodies and heavy cylinders. All methods require special conditions which should be maintained during manufacturing process to get the desired product with unique required properties.
Keywords:Stiffness, Strength, Polymer Matrix Composite, Manufacturing.

Abstract:Fuel cell technology is an emerging technology as they are going to replace fossil fuels to generate the power. As the fossil fuels are non renewable energy sources, the industries are looking for renewable energy sources to protect the environment by reducing the use of fossil fuels. There are various types of fuel cell depending on the catalyst we use to initiate the electrochemical reaction to generate electricity. Hydrogen plays a vital role in producing electrons which results in electrical energy. This paper discusses about Proton Exchange Membrane Fuel Cell and Direct Methanol Fuel Cell. With reference to some journal this paper also provides the information about performance of the two fuel cells with some characteristics which affect the current density from the fuel cells.
Keywords:Fuel cell, hydrogen, methanol, electricity.