A symmetry perceiving adaptive neural network and facial image recognition

The paper deals with the forensic problem of comparing nearly from view and facial images for personal identification. The human recognition process for such problems, is primarily based on both holistic as well as feature-wise symmetry perception aided by subjective analysis for detecting ill-defined features. It has been attempted to approach the modelling of such a process by designing a robust symmetry perceiving adaptive neural network. The pair of images to be compared should be presented to the proposed neural network (NN) as source (input) and target images. The NN learns about the symmetry between the pair of images by analysing examples of associated feature pairs belonging to the source and the target images. In order to prepare a paired example of associated features for training purpose, when we select one particular feature on the source image as a unique pixel, we must associate it with the corresponding feature on the target image also. But, in practice, it is not always possible to fix the latter feature also as a unique pixel due to pictorial ambiguity. The robust or fault tolerant NN takes care of such a situation and allows fixing the associated target feature as a rectangular array of pixels, rather than fixing it as a unique pixel, which is pretty difficult to be done with certainty. From such a pair of sets of associated features, the NN searches out proper locations of the target features from the sets of ambiguous target features by a fuzzy analysis during its learning. If any of target features, searched out by the NN, lies outside the prespecified zone, the training of the NN is unsuccessful. This amounts to non-existence of symmetry between the pair of images and confirms non-identity. In case of a successful training, the NN gets adapted with appropriate symmetry relation between the pair of images and when the source image is input to the trained NN, it responds by outputting a processed source image which is superimposable over the target images and identity may subsequently be established by examining detailed matching in machine-made superimposed/composite images which are also suitable for presentation before the court. The performance of the proposed NN has been tested with various cases including simulated ones and it is hoped to serve as a working tool of forensic anthropologists.     

Reviews

R. W. Davies, The Industrialisation of Soviet Russia 3: The Soviet Economy in Turmoil. 1929–1930. London: Macmillan, 1989, xx+601 pp., £47.50.

Peter Nolan, The Political Economy of Collective Farms: An Analysis of China's Post‐Mao Rural Reforms. Cambridge: Polity Press, 1988, viii+259 pp., £29.50.

Adam Zwass, The CMEA: The Thorny Path from Political to Economic Integration. Armonk, NY: M E Sharpe inc., 1989, xiii+268 pp., $45.00.

Szymon Jakubowicz, Wer rettet Polens Wirtschaft? Das Ringen urn die Arbeiterselbstverwaltung. (Who will save Poland's Economy? The Struggle about Workers’ Self‐Management). Freiburg im Breisgau: Herder Taschenbuch Verlag, 1989, 334 pp., DM18.90.

Jim Riordan ed., Soviet Youth Culture. London: Macmillan, 1989, x+148 pp., £27.50 h/b, £9.95 p/b.

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Francesco Benvenuti, The Bolsheviks and the Red Army, 1918–1922, translated by Christopher Woodall. Cambridge: Cambridge University Press, 1988, viii+264 pp., £27.50, $44.50.     

Human securitization of water? A case study of the Indus Waters Basin

In the large and growing literature on hydropolitics, insecurity generated through water-related conflicts is most often conceptualized under a model of economic resource scarcity. Conflict is generally reduced to the question of who has water, who needs water and thus what cost, in economic, political or military terms, is appropriate to acquiring access to water. This article argues that while such analyses effectively chart the central resource-strategic relations involved in the geopolitics of water, they nonetheless disregard the deeper biological and cultural (that is social, ethnic, religious) significance of water in any water conflict. Such analyses, it claims, are too strongly linked to the traditional (as opposed to human) security discourse and therefore run the risk of misdiagnosing the complexity of the water resource challenge. To respond to this challenge the article will develop a human security ‘metrics’ for analysing water-based conflicts in human security terms. It will then compare an analysis of the Indus Waters Treaty based upon the human security approach with an analysis based on a ‘traditional’ security assessment of the treaty in order to assess the viability of the two approaches. Finally, the article will link the comparative assessments back to the water wars literature, drawing conclusions about its strengths and weaknesses and the possibility of a synthesis of traditional and human security in the analysis of water conflict.     

The Stress Response and Adolescents’ Adjustment: The Impact of Child Maltreatment

Experience with and management of stress has implications for adolescents' behavioral and socioemotional development. This study examined the relationship between adolescents' physiological response to an acute laboratory stressor (i.e., Trier Social Stress Test; TSST) and anger regulation and interpersonal competence in a sample of 175 low-income urban adolescents (51.8% girls). Findings suggested that heightened reactivity as indicated by cortisol, heart rate, and blood pressure was associated with increased interpersonal competence and anger regulation. However, these findings were context dependent such that, for youth high in self-reported child maltreatment, heightened reactivity was associated with decreased interpersonal competence and anger regulation. Results highlight the importance of considering how context may condition the effect of stress reactivity on functioning during adolescence.     

A theory of reform consolidation in India: From crisis-induced reforms to strategic internationalization

ABSTRACT

I use the policy feedback literature to present an argument regarding the new politics of reform consolidation in India. India’s reform trajectory can be understood in terms of three distinct phases of reforms interspersed by periods of slowdown. In this narrative that goes beyond 1991, an analysis of struggles, opponents, and reversals become important, revealing a more contested pathway. In the 2000s India has moved beyond the initial, crisis-driven phase to a deeper external integration with the global economy and structural reform within. I call this phase an era of strategic internationalization. Reforms of 1985, 1991, and 1998–2000, in different ways, have begun to create new constituencies of support across India, which underlies the consolidation phase of reforms. During this long trajectory, the opponents of reforms could delay reforms but failed to reverse the direction of economic reforms. The purpose of this article is to provide a temporal framework that pays attention to mechanisms underlying different phases of reforms and how new supporters and opponents of reforms were created across different phases of the reform trajectory. Policies, the social bases of the Indian economy, and classes have been re-configured as a result.     

The Strategic Use of Peace: Non-State Armed Groups and Subnational Peacebuilding Mechanisms in Northeastern India

The northeastern region of India has witnessed several armed movements that have sought to achieve a variety of political goals ranging from secession to limited autonomy for specific ethnic groups. In seeking to limit the violence perpetrated in the course of these contemporary subnational insurgencies, a multilayered approach has been developed by the Government of India (GoI) and, more specifically, by the Ministry of Home Affairs (MHA) in coordination with the provincial (or state) governments. The range of de-escalation mechanisms range from ceasefire agreements to the more contemporary Suspension of Operations (SoO) frameworks as well as “Surrender and Rehabilitation” packages for individual members of armed groups. In certain cases, autonomous tribal governance institutions have been created within the federal structure in the backdrop of ceasefire and SoO agreements. The overall consequence of these strategies has been a measureable reduction of direct violence between the security forces and armed opposition groups. Conversely, there have been several occurrences of ethnic clashes (sometimes involving former belligerents) that have led to large-scale loss of life and forced internal displacement in the region. Furthermore, the absence of violence has not necessarily led to development. Rather, we see a situation of peace without peace dividends.     

The ‘other’ Agrarian transition? Structure,institutions and agency in sustainable rural development

This essay reviews some of the new literature on the transition to sustainable rural development (SRD). By considering various accounts of environmental degradation, its links with poverty and aspects of the agenda for SRD, the essay notes an ambiguity regarding the role of the state, which is held, in this literature, as culpable for environmental degradation, as well as given a substantial role, implicitly or explicitly, in making the transition to SRD. This ambiguity is shown via an analysis of the treatments written from historical, socio‐cultural and political economy perspectives, from which the essay draws the theme of state‐class relations, arguing a central position for these relations in SRD agendas. The essay concludes with an argument for a move to create a framework of analysis which takes into account not only public policy but also political economy and popular politics.

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Sustainable Rural Development, by Andrew Shepherd. Basingstoke and New York: St Martin's Press, 1998. Pp.x + 294. £40 (hardback); £12.99 (paperback). ISBN 0 333 664 841 and 664 85X

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Forest Use and Management in Japan and India: A Comparative Study, by K.N. Ninan. Tokyo: Institute for Developing Economies (V.R.F. Monograph Series No.286), 1996. Pp.v + 123. NP (pb). No ISBN     

Test-extractor marks under low pressure on shotgun cartridges

The necessity for firing high pressure test rounds to imprint extractor marks on shotgun cartridges in cases involving improvised or non-standard locally made firearms has been obviated. A suitable method for obtaining desired extractor marks on shotgun cartridges under low pressure has been suggested.     

An investigation into pellet dispersion ballistics.

Existing works on pellet dispersion ballistics are confined to some data-based models derived from statistical analysis of observed patterns on targets but the underlying process causing the dispersion lacks due attention. The present article delves into the relatively unexplored areas of dispersion phenomena, and attempts to develop a theoretical model for general application. The radial velocity distribution of pellets has been worked out by probing into the physical process of dispersion based on transfer of momentum from undispersed shot mass to dispersed pellets. The ratio 2u/v0 (u = root mean square (r.m.s.) radial velocity and v0 = muzzle velocity of the pellets) is found to be fairly constant for a fixed gun-ammunition combination and has been suitably designated as 'Dispersion Index' (DI) characterising its dispersion capability. The present model adequately accounts for pellet distribution on targets and it appears that 'Effective Shot Dispersion' (ESD) as introduced by Mattoo and Nabar [ESD = [(4/N0)sigma Ri2]1/2, where N(0) is the total number of pellets and Ri is the radial distance of the i-th pellet from centre of pattern], gives a faithful numerical measure of overall dispersion at a given distance. A relationship between ESD and firing distance, incorporating the effects of air resistance and gravity has been worked out, which reveals that DI controls the dispersion at a given distance. For small distances (less than 20 m) the relation reduces to a linear one, as already observed empirically and looks like ESD = E0+DI x firing distance, E0 being a parameter dependent on gun and ammunition. The present model, unlike earlier ones, is versatile enough to explain the natures of the dependence of dispersion on firing distance as well as on gun-ammunition parameters, which are essential for a faithful reconstruction of a crime scene. The model has been tested with such experimental data as are available and reasonable agreement is observed.     

An unusual case of cranial image recognition

We encountered an unusual practical case of craniofacial identification recently. The peculiarity of the case was that the skull itself was not available for examination unlike other such common cases. The supplied material exhibits were, a nearly front view photograph of a skeletonized face and a front view face photograph of the suspected victim. Further, the condition of the skull during taking its photograph was such that its lower and the upper jaws were not in a normal closed condition. The procedure involved in dealing with such a complicated craniofacial identification problem would be quite interesting from a forensic investigator's point of view, since standard methods of skull identification like photo/video superimposition techniques were not at all applicable here. As such, the present case report provides the details of the multiphase procedure adapted by us in dealing with this abnormal case. A solution to this unprecedented craniofacial identification problem was worked out by appropriate exploration of a newly introduced digital image processing technique that is based on craniofacial symmetry perception. The procedure leads to the reconstruction of a superimposable cranial image with upper and lower teeth in normal closed condition for establishment of its identity in usual way.