ID: 58383
Title: Maximum power point watching versus maximum power point tracking for solar generators
Author: Alon Kuperman, Moshe Averbukh, Simon Lineykin
Editor: Lawrence L Kazmerski
Year: 2013
Publisher: Elsevier, Vol 19, March 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: Renewable and Sustainable Energy Reviews
Keywords: Solar Array, Load matching, MPPT
Abstract: In this paper, a method of designing an optimally arranged solar array for converterless matching to a known linear load is proposed and compared to the classical Maximum Power Point Tracking method. Long-time performance of both methods is examined for three common types of loads under real weather conditions. Test results indicate that only in case of a pure resistive load the Maximum Power Point Tracking - based solar system advantage is undisputed. In case of a load represented by a voltage source with internal resistance, the long term energy production of the system employing a practical Maximum Power Point Tracking operated converter is on a par or lower than the converterless system energy yield.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58382
Title: Wind power policy in complex adaptive markets
Author: Scott Victor Valentine
Editor: Lawrence L Kazmerski
Year: 2013
Publisher: Elsevier, Vol 19, March 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: Renewable and Sustainable Energy Reviews
Keywords: Complexity, punctuated equilibrium, technoloyg policy, Denmark, Energy policy
Abstract: This paper aims to advance research into the effectiveness of policies for encouraging technologies transition in the energy sector (in general) and wind power (in particular). It contends that the ineffectiveness of wind power development policy in most nations stems from a linear approach to policy design that is unsuited to complex adaptive markets. The paper argues that in complex adaptive markets, policiesare required that foster competition on a level playing field. Insights are extracted from complexity theory to advance four principles for effective wind power policy in such markets. These principles include establishing policy initiatives to: encourage technological diversity, establish clear and progressive short to medium-term targets, enhance environmental monitoring systems and establish a malleable policy regime that directly resolves emergent challenges while simultaneously sustaining market momentum to ensure long-term targets are met. In order to demonstrate the applied relevance of these principles, the paper applies these concepts to a historical analysis of Denmark ' s wind power development policies.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58381
Title: Climate change in Indonesia: A glimpse of Riau and East Kalimantan
Author: Dr Reshmi Banerjee
Editor: R K Pachauri
Year: 2012
Publisher: TERI, Vol 9, Issue 2, September 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Resources Energy and Development
Keywords: climatic change
Abstract: Indonesia is the largest and widest archipelago in the world with a coastline length of 81,000 km alongwith 17,508 islands, which makes it one of the most vulnerable countries to climatic changes. This paper focusses on the climatic changes in Indonesia with special reference to Riau and East Kalimantan. It is based on secondary literature and examines the effects of greenhouse emissions, deforestation, changes in land use, etc. on environment, biodiversity, and livelihood options of the people living there. Finally, the article explores the national/governmental efforts and the interntional assistance provided to help Indonesia deal better with climate change adaptation. The future priority areas of intervention would be decentralized risk reduction initatives and resource conservation, educating farmers and vulnerable communities, coastal area research, local interventions, and coordiantion between the provinces.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58380
Title: Induced diffusion of innovation: A study on wind energy development in Karnataka
Author: K M Murugesha and Barik Prasanna Kumar
Editor: R K Pachauri
Year: 2012
Publisher: TERI, Vol 9, Issue 2, September 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Resources Energy and Development
Keywords: Windmill, diffusion of innovation, logistic growth, co-integration and error correction model, public policy
Abstract: Diffusion of windmill technology is necessary for socio-ecnomic development in the context of acute shortage of energy. This paper attempts to understand the patterns of this diffusion of innovation and its relationship with several independent factors, such as number of wind turbines allotted, installed capacity, rotor hub height, wind energy generation rating, and the number of wind firm developers. Methodologies like the augemented Dickey-Fuller test, and the Engle-Granger co-integration and error correction model are used. Empirical results indicate that one Indian state, i.e., Karnataka, has enough potential for wind diffusion with logistic pattern of growth. This potentiality exists because of the co-integration relationship between diffusion of innovation and each of the independent variables with long-run equilibrium adjustments. However, results also indicate that the quality of wind turbines, appropriate sites, and efficiency of wind farm developers should be a matter of great concern. Therefore, this study will be useful to public policy makers for the realization of efficient, reliable, and sustainable energy in the economy.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58379
Title: Financial and economic assessment of biodiesel production and use in India
Author: Herath Gunatilake
Editor: R K Pachauri
Year: 2012
Publisher: TERI, Vol 9, Issue 2, September 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Resources Energy and Development
Keywords: Biofuels, biodiesel
Abstract: In recent times, biofuels are receiving increased attention because they have the potential to enhance the energy security of energy deficit nations while reducing greenhouse gas emissions. They also provide opportunities for inclusive rural development. This paper shows that prevailing administered prices do not provide adequate financial incentives to produce biodiesel in India. In contrast to financial analysis results, social cost-benefit analysis shows that biodiesel production from jatropha and pongamia is economically viable. This paper illustrates that financial analysis results may not provide a sound basis for pubic policy, particularly when there are distortions in the market. Biodiesel has the potential to significantly generate rural employment and reduce greenhouse gas emissions. If the production is limited only to wastelands, in meeting 20 percent blending target, biodiesel would not affect food production in India. While explaining the reasons for failure of biodiesel production taking off in a big way in India, the paper argues that public sector intervention are necessary to correct existing market, non-market, and institutional failures, which prevent development of biodiesel markets.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58378
Title: Time of the pellets
Author: Dittmar Koop
Editor: Jorg-Rainer Zimmermann
Year: 2013
Publisher: German Wind Energy Association, No 2, March 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: New Energy - magazine for renewable energy
Keywords: Pellet boilers
Abstract: It has taken years, but sales of pellet boilers are finally picking up. High oil prices and better marketing strategies are behind the boom.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58377
Title: Wind energy sector expecting consistent growth
Author: None
Editor: Jorg-Rainer Zimmermann
Year: 2013
Publisher: German Wind Energy Association, No 2, March 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: New Energy - magazine for renewable energy
Keywords: None
Abstract: None
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58376
Title: Healthy appetite for assets
Author: Rohan Boyle
Editor: Jorg-Rainer Zimmermann
Year: 2013
Publisher: German Wind Energy Association, No 2, March 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: New Energy - magazine for renewable energy
Keywords: Renewable power assets, equipment manufacturers
Abstract: Given their relatively stable, regulated returns, demand for renewable power assets is growing amid continued economic uncertainty. The level of interest of potential acquirers in buying equipmetn manfacturers, on the other hand, remains low.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58375
Title: A green perestroika?
Author: Karin Deckenbach
Editor: Jorg-Rainer Zimmermann
Year: 2013
Publisher: German Wind Energy Association, No 2, March 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: New Energy - magazine for renewable energy
Keywords: Renewable energy
Abstract: Russia is awash with wind and sun, yet renewable play almost no part in the energy mix at all. A new funding law could change that-and opern up the market to the west.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58374
Title: Chinese PV boost
Author: None
Editor: Jorg-Rainer Zimmermann
Year: 2013
Publisher: German Wind Energy Association, No 2, March 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: New Energy - magazine for renewable energy
Keywords: None
Abstract: None
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58373
Title: Automatic camera calibration in close range photogrammetry
Author: Clive S Fraser
Editor: Russell G Congalton
Year: 2013
Publisher: ASPRS, Vol 79, No 4 April 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: Photogrammetric Engineering and Remote Sensing
Keywords: Camera calibration
Abstract: Automatic camera calibration using self-calibration with the aid of coded target is now very much the norm in close-range photogrammetry. This is irrespective of whether the cameras to be calibrated are high-end metric, or the digital SLRs and consumer - grade models that are increasingly being employed for image-based 3D measurement. Automation has greatly simplified the calibration task, but there are real prospects that important camera calibration issues may be overlooked in what has become an almost black-box operation. This paper discusses the impact of a number of such issues, some of which relate to the functional model adopted for self-calibration, and others to practical aspects which need to be taken into account when pursuing optimal calibration accuracy and integrity. Issues discussed include interior orientation stability, calibration reliability, focal plane distortion, image point distribution, variation in lens distortion with image scale, color imagery and chromatic aberration, and whether 3D object space control is warranted. By appreciating and accounting for these issues, users of automatic camera calibration will enhance the prospect fo achieving an opimal recovery of scene-independent camera calibration parameters
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58372
Title: Pedestrian network extraction from fused aerial imagery (Orthoimages) and laser imagery (Lidar)
Author: Piyawan Kasemsuppakorn and Hassan A Karimi
Editor: Russell G Congalton
Year: 2013
Publisher: ASPRS, Vol 79, No 4 April 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: Photogrammetric Engineering and Remote Sensing
Keywords: pedestrian networks,
Abstract: A pedestrian network is a topological map that contains the geometric relationship between pedestrian path segments (e.g., sidewalk, crosswalk, footpath), which is needed in a variety of applications, such as pedestrian networks are not widely available. In an effort to provide an automatic means for creating pedestrian networks, this paper presents a methodology for extracting pedestrian network from aerial and laser images. The methodology consists of data preparation and four steps: object filtering, pedestrian path region extraction, pedestrian network construction, and raster to vector conversion. An experiment, using ten images, was conducted to evaluate the performance of the methdology. Evaluation results indicate that the methodology can extract sidewalk, crosswalk, footpath, and building entrances; it collects pedestrian networks with 61 percent geometrical completeness, 67.35 percent geometrical correctness, 71 percent topological completeness and 51.38 percent topological correctness.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58371
Title: Applicability of multi-date land cover mapping using Landsat-5 TM imagery in the Northeastern US
Author: Meghan Graham MacLean and Russell G Congalton
Editor: Russell G Congalton
Year: 2013
Publisher: ASPRS, Vol 79, No 4 April 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: Photogrammetric Engineering and Remote Sensing
Keywords: object-based image analysis approach (OBIA), classification and regression tree (CART) technique
Abstract: In many situations, multi-date image classification improves classification accuracies. However, with improved accuracies comes increased image processing time and effort. This work investigates the cirumstances under which multi-date image classification is significantly better than single-date classification using Landsat -5 TM imagery for southeastern New Hampshire. Multiple Landsat images were processed for every three years from 1986 to 2010 and classified using an object-based image analysis approach (OBIA) with a classification and regression tree (CART) technique. Two maps were created for each of the mapping years, one using a single image, and another using multiple images from that year. The multi-date classification process generally performed better than the single-date process. However, the significance of the improvement was primarily dependent on the accuracy of the single-date map. Therefore, if the accuracy of the single-date classification is acceptable, it may not be necessary to perform the multi-date classfication.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58370
Title: An experimental comparison of semi-supervised learning algorithms for multispectral image classification
Author: Enmei Tu, Jie Yang, Jiangxiong Fang, Zhenghong Jia, and Nikola Kasabov
Editor: Russell G Congalton
Year: 2013
Publisher: ASPRS, Vol 79, No 4 April 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: Photogrammetric Engineering and Remote Sensing
Keywords: Semi-Supervised Learning (SSL), Taylor Series Exapansion (TSE), overall accuracies (OAs)
Abstract: Semi-Supervised Learning (SSL) method has recently caught much attention in the fields of machine learning and computer vision owing to its superiority in classifying abundant unlabelled samples using a few labeled samples. The goal of this paper is to provide an experimental efficiency comparison between graph based SSL algorithms and traditional supervised learning algorithms (e.g., support vector machines) for multispectral image classification. This research shows that SSL algorithms generally outperform supervised learning algorithms in both classification accuracy and anti-noise ability. In the experiments carried out on two data sets (hyperspectral image and Landsat image), the mean overall accuracies (OAs) of supervised learning algorithms are 15 percent and 86 percent, while the mean OAs of SSL algorithms are 26 percent and 99 percent. To overcome the polynomial complexity of SSL algorithms, we also developed a linear complexity algorithm by employing multivariate Taylor Series Exapansion (TSE) and Woodbury Formula.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None
ID: 58369
Title: Rational function model in processing historical aerial photographs
Author: Ruijin Ma
Editor: Russell G Congalton
Year: 2013
Publisher: ASPRS, Vol 79, No 4 April 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: Photogrammetric Engineering and Remote Sensing
Keywords: aerial photographs, camera model
Abstract: A large amount of aerial photographs were acquired early 1900s for various purposes. These aerial photographs provide valuable baseline data for a variety of environmental studies. To be used for analysis together with other data, these photographs need to be referenced to a ground coordinate system. Often large topographical variations in photo ground coverage demand these photographs be orthorectified using photogrammetric methods for acceptable mapping accuracy. However, camer models for these historical photographs are usually unavailable. Additionally, land-cover change over the years makes it a great challenge to collect accurate control points for calculating camera models. This study investigated the rational function model for orthorectify historical aerial photographs. The analysis results suggest that while the linear, the 2nd order, and the 3rd order RFMs are all able to closely approximate the rigorous frame camera model, the linear RFM is optimal in representing imaging geometries of historical photographs.
Location: TE12, New Biological Sciences, IISc
Literature cited 1: None
Literature cited 2: None