1. Introduction and Overview. 2. Detecting Influential Observations and Outliers. 3. Detecting and Assessing Collinearity. 4. Applications and Remedies. 5. Research Issues and Directions for Extensions. Bibliography. Author Index. Subject Index.

Regression Diagnostics: Identifying Influential Data and Sources of Collinearity

A review on biodiesel production using catalyzed transesterification

The world is confronted with the twin crises of fossil fuel depletion and environmental degradation. The indiscriminate extraction and consumption of fossil fuels have led to a reduction in petroleum reserves. Petroleum based fuels are obtained from limited reserves. These finite reserves are highly concentrated in certain region of the world. Therefore, those countries not having these resources are facing a foreign exchange crisis, mainly due to the import of crude petroleum oil. Hence it is necessary to look for alternative fuels, which can be produced from materials available within the country. Although vegetative oils can be fuel for diesel engines, but their high viscosities, low volatilities and poor cold flow properties have led to the investigation of its various derivatives. Among the different possible sources, fatty acid methyl esters, known as Biodiesel fuel derived from triglycerides (vegetable oil and animal fates) by transesterification with methanol, present the promising alternative substitute to diesel fuels and have received the most attention now a day. The main advantages of using Biodiesel are its renewability, better quality exhaust gas emission, its biodegradability and the organic carbon present in it is photosynthetic in origin. It does not contribute to a rise in the level of carbon dioxide in the atmosphere and consequently to the green house effect. This paper reviews the source of production and characterization of vegetable oils and their methyl ester as the substitute of the petroleum fuel and future possibilities of Biodiesel production.

Biodiesel production through the use of different sources and characterization of oils and their esters as the substitute of diesel: A review

Political, economic and environmental impacts of biofuels: A review

Biorefineries for biofuel upgrading: A critical review

Comparison of GHG emissions from diesel, biodiesel and natural gas refuse trucks of the City of Madrid

Due to growing concerns about NOx and particulate matter (PM) emissions from diesel engines, stricter regulations are being introduced requiring advanced emission control technology. In response the diesel industry has begun testing various emission control technologies and applying them. To assess vehicle renewal policies of bus companies, two exhaust after-treatment technologies are compared: the combination of a diesel particulate filter and an exhaust gas re-circulation system and the combination of a selective catalytic reduction and urea. On-board emission measurements were conducted under real-world driving conditions on a specific bus route in the city of Madrid.

On-road emissions from urban buses with SCR + Urea and EGR + DPF systems using diesel and biodiesel

A method is presented to determine variable speed limits, taking account of road geometry and vehicle characteristics. This method is based on a mathematical vehicle model and a detailed digital map that contains every piece of data that may be relevant from a safety point of view. Objective safety criteria such as tyre–road friction and sight distance are used. The main purpose of calculating new limits is to improve safety and to increase the acceptance of these limits by drivers. These safe speed limits have been integrated into the Spanish intelligent speed adaptation system and a new interface has been developed in order to alert the driver before they reach dangerous stretches of road. Furthermore, this system has been tested under real driving conditions. Test results show that speeding on sharp bends is reduced and traffic is more homogeneous. Both effects lead to greater traffic safety.

Evaluation of in-vehicle dynamic speed assistance in Spain: algorithm and driver behaviour

Estimation of road transportation emissions in Spain from 1988 to 1999 using COPERT III program

Digital maps can provide support for numerous advanced driver assistance systems (ADAS) aimed at improving road safety. These new uses require more highly detailed and precise maps. The use of a datalog vehicle to collect roadway geometry data can fulfil these specifications. This paper presents fast, accurate measurement with an on-board inertial system together with a method to evaluate measurement uncertainty, particularly for any variables obtained indirectly. It also presents an algorithm for segmentation and fitting geometric curves to the experimental points, following current highway design standards. The algorithms have been applied to real road measurements. Segmentation has been done in straight alignments, circular curves and transition curves whose characteristic parameters are calculated. It has been seen that with a very small data set it is possible to reconstruct the measured geometry with few discrepancies regarding the experimental points.

Francisco Aparicio

Papers

Comparison of GHG emissions from diesel, biodiesel and natural gas refuse trucks of the City of Madrid

On-road emissions from urban buses with SCR + Urea and EGR + DPF systems using diesel and biodiesel

Evaluation of in-vehicle dynamic speed assistance in Spain: algorithm and driver behaviour

Estimation of road transportation emissions in Spain from 1988 to 1999 using COPERT III program

Measurement uncertainty determination and curve-fitting algorithms for development of accurate digital maps for advanced driver assistance systems