bluuebunny/crossref_metadata_2025_split huggingface dataset:
Speeding up active relevance feedback with approximatekNN retrieval for hyperplane queries
Authors: Crucianu Michel , Estevez Daniel , Oria Vincent , Tarel Jean‐Philippe 
Published: July 2010

AbstractIn content‐based image retrieval, relevance feedback (RF) is a prominent method for reducing the “semantic gap” between the low‐level features describing the content and the usually higher‐level meaning of user's target. Recent RF methods are able to identify complex target classes after relatively few feedback iterations. However, because the computational complexity of such methods is linear in the size of the database, retrieval can be quite slow on very large databases. To address this scalability issue for active learning‐based RF, we put forward a method that consists in the construction of an index in the feature space associated to a kernel function and in performing approximatekNNhyperplanequeries with this feature space index. The experimental evaluation performed on two image databases show that a significant speedup can be achieved at the expense of a limited increase in the number of feedback rounds. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 150–159, 2008
Does compression affect image retrieval performance?
Authors: Schaefer Gerald 
Published: July 2010

AbstractImage retrieval and image compression are both fields of intensive research. As lossy image compression degrades the visual quality of images and hence changes the actual pixel values of an image, low level image retrieval descriptors which are based on statistical properties of pixel values will change, too. In this article we investigate how image compression affects the performance of low‐level colour descriptors. Several image retrieval algorithms are evaluated on a speciated image database compressed at different image quality levels. Extensive experiments reveal that while distribution‐based colour descriptors are fairly stable with respect to image compression a drop in retrieval performance can nevertheless be observed for JPEG compressed images. On the other hand, after application of JPEG2000 compression only a negligible performance drop is observed even at high compression ratios. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 101–112, 2008
Effective and efficient browsing of image databases
Authors: Schaefer Gerald , Ruszala Simon 
Published: July 2010

AbstractFollowing advances in imaging technology as well as decreasing costs of related products and devices, information is becoming more and more visually oriented. Consequently, the management and retrieval of visual information such as images and image collections is receiving enormous interest. While for image databases the query‐by‐example concept is at the moment the most commonly adopted retrieval method it is only of limited practical use. Techniques which allow human‐centred navigation and visualisation of complete image collections therefore provide an interesting alternative. In this article we introduce an effective and efficient approach for user‐centred navigation of large image databases. Image thumbnails are projected onto either a plane or a spherical surface so that images that are visually similar are located close to each other in the visualisation space. To avoid overlapping and occlusion effects images are placed on a regular grid structure while large databases are handled through a clustering technique paired with a hierarchical tree structure which allows for an intuitive real‐time browsing experience. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 137–145, 2008
Efficient video retrieval using index structure
Authors: Zhang Jing 
Published: July 2010

AbstractVideo retrieval remains a challenging problem since most of traditional query algorithms are ineffectual and time‐consuming. In this article, we proposed a new video retrieval method, which segments the video stream by visual similarity between neighboring frames, and adopt the high‐dimensional index structure to organize segments. Furthermore, a new similarity measure is brought forward to improve the query accuracy by synthetically taking into account the visual similarity and temporal order among video segments. Based on the similarity measure, we propose a novel video clip retrieval algorithm which achieves high query efficiency by using restricted sliding window to construct candidate video clips. Experimental results show that the proposed video retrieval method is efficient and effective. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 113–123, 2008
Using editing operations to improve searching by color in multimedia database systems
Authors: Brown Leonard , Gruenwald Le 
Published: July 2010

AbstractSince multimedia database management systems determine similarity by comparing sets of image features, relevant images in the database can be missed if their features do not match those extracted from the query image. Many failed matches can be avoided if modified versions of the missed relevant images are also stored in the underlying database. To minimize the storage cost associated with adding extra images to the database, the modified versions can be stored as sequences of editing operations instead of as large, binary objects. This article presents a technique for processing color‐based queries in this environment that accesses the sequences of editing operations directly. It also presents a methodology that can be used to speed up the query processing just as ordered indices speed up the processing of traditional queries. In addition, this article provides a performance illustrating the technique's strengths and weaknesses when compared with the traditional approach to processing color‐based queries. The results indicate that with low similarity thresholds, the proposed technique processes similarity searches more accurately than the traditional approach while using less database storage space since the modified versions are kept as editing operation sequences. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 182–194, 2008
A projection‐based image quality measure
Authors: Pang Jianxin , Zhang Rong , Lu Lu , Tang Jinhui , Liu Zhengkai 
Published: July 2010

AbstractObjective image quality measure, evaluating the image quality consistently with human perception automatically, could be employed in image and video retrieval. And the measure with high efficiency and low computational complexity plays an important role in numerous image and video processing applications. On the assumption that any image's distortion could be modeled as the difference between the projection‐based values (PV) of reference image and the counterpart of distorted image, we propose a new objective quality assessment method based on signal projection for full reference model. The proposed metric is developed by simple parameters to achieve high efficiency and low computational complexity. Experimental results show that the proposed method is well consistent with the subjective quality score. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 94–100, 2008
Image retrieval in multipoint queries
Authors: Vu Khanh , Cheng Hao , Hua Kien A. 
Published: July 2010

AbstractTraditional content‐based image retrieval (CBIR) systems find relevant images close to an example image. This single‐point model has been shown inadequate for complex queries built on high‐level concepts. Recent CBIR systems allow users to use multiple examples to compose their queries. The multipoint model provides extended flexibility in identifying relevant sets of arbitrary shape that the previous approach is unable to formulate. However, the continuing use of conventional measures (e.g., Lp norms) to evaluate these queries undermines the advantages of the new system. From the results of recent studies, we show that two important inferences can be made. Specifically, they are the continuity of image representation and the nonhomogeneity of the feature space. These characteristics enable the precise identification of points that satisfy the constraints established in multipoint queries and for any orthogonal feature representations. Generally, the sets are convex hulls and can be described by a linear system of equations with constraints. We discuss how to solve the system and propose an indexing procedure to efficiently determine the exact sets. We evaluated the performance of the proposed technique against state‐of‐the‐art methods on large sets of images. The results indicate that the new measure captures semantic image classes very well, and the superiority of our approach over the recent techniques is evident in simulated and realistic environments. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 170–181, 2008
Defining a new feature set for content‐based image analysis using histogram refinement
Authors: Park Jongan , An Youngan , Kang Gwangwon , Rasheed Waqas , Park Seungjin , Kwon Goorak 
Published: July 2010

AbstractThe proposed method is based on color histogram. A new set of features are proposed for content‐based image retrieval (CBIR) in this article. The selection of the features is based on histogram analysis. Standard histograms, because of their efficiency and insensitivity to small changes, are widely used for CBIR. But the main disadvantage of histograms is that many images of different appearances can have similar histograms because histograms provide coarse characterization of an image. We define an algorithm that utilizes the concept of Histogram Refinement (Pass and Zabih, IEEE Workshop on Applications of Computer Vision (1996), 96–102) and we call it color refinement method. Color refinement method splits the pixels in a given bucket into several classes just like histogram refinement method. The classes are all related to colors and are based on color coherence vectors. After the calculation of clusters using color refinement method, inherent features of each of the cluster is calculated. These inherent features include size, mean, variance, major axis length, minor axis length, and angle between x‐axis and major axis of ellipse for various clusters. These inherent features are finally used for image retrieval using Euclidean distance. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 86–93, 2008
Motherhood constellation and representational change in pregnancy
Authors: Innamorati Marco , Sarracino Diego , Dazzi Nino 
Published: July 2010

AbstractThe main aim of this study was to explore the prevalence and development of the motherhood constellation in pregnant women. The participants of the study were 162 pregnant women who were divided into three subgroups according to their gestation period (<6 months, 6–7 months, >7 months). The women were assessed using the Breakfast Interview, a microanalytic method devised by D.N. Stern (1995, 2004a). Two judges coded the transcripts of the interviews for the presence of the motherhood constellation themes using three‐level rating scales. Results showed that the Life/Growth theme was the most frequent theme during pregnancy, and supported the hypothesis of a “peak” of the motherhood constellation themes around Month 6 to Month 7.
Mothers' facial expressions of pain and fear and infants' pain response during immunization
Authors: Horton Rachel E. , Pillai Riddell Rebecca R. 
Published: July 2010

AbstractThe goal of the current study was to examine the relationship between mothers' spontaneous facial expressions of pain and fear immediately preceding their infants' immunizations and infants' facial expressions of pain immediately following immunizations. Infants' observations of mothers' faces prior to immunization also were examined to explore whether these observations moderated the effect of mothers' facial expressions on infant pain. The final sample included 58 mothers and their infants. Video data were used to code maternal facial expressions, infants' observations, and infants' expressions of pain. Infants who observed their mothers' faces had mothers who expressed significantly more fear pre‐needle. Furthermore, mothers' facial expressions of mild fear pre‐needle were associated with lower levels of infants' pain expression post‐needle. A regression analysis confirmed maternal facial expressions of mild fear pre‐needle as the strongest predictor of infant pain post‐needle after controlling for infants' observations of mothers' faces. Mothers' subtle facial expressions of fear may indicate a relationship history of empathic caregiving that functions to support infants' abilities to regulate distress following painful procedures. Interventions aimed at improving caregiver sensitivity to infants' emotional cues may prove beneficial to infants in pain. Future directions in research are discussed.
Understanding the “ghosts in the nursery” of pregnant women experiencing domestic violence: Prenatal maternal representations and histories of childhood maltreatment
Authors: Malone Johanna C. , Levendosky Alytia A. , Dayton Carolyn Joy , Bogat G. Anne 
Published: July 2010

AbstractSelma Fraiberg and colleagues (1975) conceptualized the “ghosts in the nursery” as experiences from a mother's past that influenced her ability to form a warm and attuned relationship with her child. Contemporary infant mental health interventions often ask the mother to reflect on her own history of attachment relationships to gain insight into as well as to strengthen her developing relationship with her child. This study investigated the association between a mother's history of childhood maltreatment (CM) and her subsequent prenatal maternal representation during the third trimester of pregnancy. Controlling for domestic violence (DV), distorted prenatal representations were associated with higher rates of self‐reported childhood physical neglect. In addition, DV moderated the relationship between representations and CM, such that women who were exposed to DV during pregnancy and had distorted prenatal representations were least likely to report childhood physical and sexual abuse. Implications are discussed in relation to infant mental health interventions which rely on a parent's ability to psychologically access and reflect on childhood histories to more sensitively parent her own child.
Sustainable groundwater management in Pakistan: challenges and opportunities
Authors: Qureshi Asad Sarwar , Gill Mushtaq A. , Sarwar Asrar 
Published: July 2010

AbstractIn Pakistan, accessibility to groundwater is a dividing line between poverty and welfare. Access to groundwater allows poor people to not only increase their production and incomes, but also reduce their vulnerability against external shocks. However, the present uncontrolled and unregulated use of groundwater is replete with serious consequences. Rapidly falling groundwater tables and increasing salt content in the pumped groundwater are threatening the sustainability of irrigated agriculture. This paper reviews the challenges faced by Pakistan due to unsustainable use of groundwater and identifies opportunities for improving its management. The paper suggests that there is a need for a more refined understanding of the peculiarities and socio‐ecology of groundwater before identifying management solutions. In addition to institutional reforms, supply and demand management approaches also need to be followed. For demand management, farmers should adopt improved irrigation and agronomic practices. Current land use patterns should be reviewed to replace water‐intensive crops with water‐efficient crops. For supply management, use of waste water and saline drainage effluent for agriculture should be promoted. In rain‐fed areas, more efforts should be focused on rainwater harvesting. Effective coordination between organizations responsible for the management of groundwater resources also needs to be enhanced. Copyright © 2008 John Wiley & Sons, Ltd.
Development of tidal areas: some principles and issues towards sustainability
Authors: Hyun Park Sang , Simm Jonathan , Ritzema Henk 
Published: July 2010

AbstractThe coastal zone comprises only 3% of the earth's surface, but contains a disproportionately high amount of its assets. Tidal areas include all those coastal areas where the tidal processes are capable of affecting man's activity or of being influenced by man. Tidal areas differ greatly depending on their location, geophysical conditions, climate, tidal range and cultural differences. Throughout the world, tidal areas have been and are being developed. These developments will continue as food production will need to be doubled in the next 25 years. To address questions related to a sustainable development of tidal areas, the International Commission of Irrigation and Drainage (ICID) established the Working Group on Sustainable Development of Tidal Areas in 2001. The working group has studied these questions and formulated principles and issues for sustainable development of tidal areas based on the relevant international conventions. The aim of this paper is to represent the official position of ICID and to support the preparation of the ICID HandbookTowards Sustainable Development of Tidal Area: Some Principles and Experiences. Copyright © 2009 John Wiley & Sons, Ltd.
From central control to service delivery? reflections on irrigation management and expertise
Authors: Ertsen Maurits W. 
Published: July 2010

AbstractThe demand upon irrigated agriculture to modernize to improve productivity is increasing. This paper defines some of the key challenges the irrigation experts face in responding to this societal demand on irrigation, with a focus on water delivery. Histories of management and design in irrigation engineering still influence current perceptions of irrigation, although new ideas from research have influenced the ways irrigation management has developed in the last 30 years. Currently, modernization of irrigation is understood as transforming irrigation management to enable it to serve the demands of farmers. The position of irrigation experts changed from being the main person responsible for an entire production system to being a service‐oriented manager. Taking into account farmer demand and responses to water deliveries is still a challenge for many agencies. The paper argues that, even though farmer interventions are not always appropriate, farmer interventions are to be taken as standard in irrigation. Engineers should ensure that systems deliver what is asked for, through selecting physical components within a clearly defined operational strategy. Such a service‐oriented approach demands irrigation experts with high technical qualifications in hydraulics and hydrology. Copyright © 2009 John Wiley & Sons, Ltd.
Modernization of large‐scale irrigation systems: is it an achievable objective or a lost cause
Authors: Plusquellec Hervé 
Published: July 2010

AbstractDespite the probability of a new food crisis, which was partly delayed by the explosive use of groundwater, not much attention has been given to improving performance of large‐scale irrigation systems during the last two decades. Technologies exist and training materials are available. In most cases, the causes of poor performance and the solutions to improving performance are technical, managerial and policy reforms. This paper discusses the diversity of large schemes in developing countries and their historical background, the conditions favourable to the modernization in developed and emerging countries and the constraints to modernization in developing countries. The paper identifies the models of large‐scale development which could be technically improved, those which have less potential or would mainly benefit from institutional reforms. The paper concludes with recommendations on how to remove the constraints to modernization of large schemes in developing countries. Otherwise, irrigation modernization may not take place at the pace required to meet food requirements in the future. Copyright © 2009 John Wiley & Sons, Ltd.
Water and society: New problems faced, new skills needed
Authors: Molle François 
Published: July 2010

AbstractIn the last two decades water has clearly moved from the purview of experts and engineers to a wider forum where stakeholders articulate different claims, values and interests around water management issues. This article takes the example of current debates on water resource development in the Mekong basin and reflects on what are the current challenges, the visions of the future that are in conflict and the skills available. It reflects on the extent to which new practices have been incorporated in water‐related decision‐making and reviews the implications in terms of skills needed for tomorrow's water management. Copyright © 2009 John Wiley & Sons, Ltd.
Debating the water professional of tomorrow
Authors: van Vuren Gerrit , Liebrand Janwillem , Vincent Linden 
Published: July 2010

AbstractToday's water problems seem both more urgent and complex than those of the past, and meeting tomorrow's food, fibre and biofuel demands with less water while conserving natural environments and also adapting to the effects of climate change, calls for new modes of operation. Centralistic and technocratic approaches to solving water problems are giving way to approaches that acknowledge the inherently political character of water management, the plurality of its actors, institutions, discourses and knowledge systems, triggering a debate about what the knowledge and skill requirements are for the water professional of tomorrow, and who these professionals will be. The papers in this special journal edition suggest there is no blueprint for facing the new challenges in the water sector. Instead, the perspectives on the profession clearly reflect the opposite, namely the complexity of water management, i.e. the perspectives presented addressed many different issues, were wide of range and manifold. Copyright © 2009 John Wiley & Sons, Ltd.
Will future water professionals sink under received wisdom, or swim to a new Paradigm?
Authors: Merrey Douglas J. 
Published: July 2010

AbstractThis paper challenges water professionals to ask fundamental questions about public actions for water resources development and currently accepted knowledge and skills used to pursue these actions. It critically examines three common assumptions underlying the current water resources development paradigm: that “water security” is a necessary condition for economic growth and lack of it is preventing development of poor countries; that achieving water security requires massive public infrastructure development; and “stakeholder consultation” is sufficient to minimize potential social and environmental damage while maximizing equitable benefit sharing. Using examples from Africa, the paper raises questions about these assumptions and suggests there are alternative agricultural water interventions that cost less and have higher benefits. The lack of sufficient attention to alternatives to large‐scale infrastructure reflects the failure of water professionals to recognize the political nature of water development. The conclusion poses five sets of research questions and encourages students to pursue these while questioning the normal water resources development paradigm. Copyright © 2009 John Wiley & Sons, Ltd.