Classification of premium and regular gasoline by gas chromatography/mass spectrometry,principal component analysis and artificial neural networks

Detection and correct classification of gasoline is important for both arson and fuel spill investigation. Principal component analysis (PCA) was used to classify premium and regular gasolines from gas chromatography-mass spectrometry (GC-MS) spectral data obtained from gasoline sold in Canada over one calendar year. Depending upon the dataset used for training and tests, around 80-93% of the samples were correctly classified as either premium or regular gasoline using the Mahalanobis distances calculated from the principal components scores. Only 48-62% of the samples were correctly classified when the premium and regular gasoline samples were divided further into their winter/summer sub-groups. Artificial neural networks (ANNs) were trained to recognise premium and regular gasolines from the same GC-MS data. The best-performing ANN correctly identified all samples as either a premium or regular grade. Approximately 97% of the premium and regular samples were correctly classified according to their winter or summer sub-group.     

Technology and Criminal Justice

The extent and use of technology in the British criminal justice system is uneven. Two areas are examined; first where technology is used in prisons or by the police, and secondly when it is used to develop new sanctions, as with electronic monitoring, or as attachments to existing sanctions such as drug testing. Technology in prisons is mainly in the form of perimeter security, and in the police through CCTV cameras or databases. In the second the emphasis is on tracker systems which gives the supervisor greater control. Technological development in criminal justice is not without its critics. Some regard existing technological developments with suspicion, seeing them as a means of enhancing control, or as an attack on traditional liberal values, or more importantly as an extension of a form of behaviourism which is concerned only with the observable act. Others note the expensive failures of technology where systems fail to work or are delivered late. It is suggested a Government study is required to examine existing technologies and its likely future impact whether on the criminal justice system generally or on those working within it or as inmates.     

Correlates of self-concept among black early adolescents

This study examines the self-concept of Black eighth-grade students from the Midwest in relation to Black acceptance, social intimacy, locus of control, and sex-role type. Twenty-eight students high in self-concept were compared with 31 students whose self-concept was low. As predicted, the high self-concept group scored higher than the low self-concept group in intimacy, internality, and acceptance of black identity. As also predicted, the high self-concept group had a significantly greater number of adolescents with masculine and androgynous sex roles than the low self-concept group; Black females with high self-concepts included a larger proportion of individuals with androgynous sex roles than low self-concept females. However, the prediction that high self-concept males would have a larger proportion of masculine sex roles than low self-concept males was not supported. The difficult situation of the low self-concept adolescents is discussed, along with the implications for intervention.On clinic internship at Smolian Psychiatric Clinic in Birmingham, Alabama. Major interests are clinical psychology and Black identity.Received Ph.D. in social psychology from the University of Colorado. Major interests are the development of intimacy and identity in adolescence and young adulthood.     

Toward a contemporary tradition for menarche

A cultural tradition to acknowledge a girl's first menstrual period is proposed in order to overcome the negative connotation of the event. Three basic questions regarding such a tradition are addressed: Who would participate? What would it mean? What type of activity should it be? A research team consisting of a psychologist, a nurse, and a social worker suggests answers based on their interviews with mothers and daughters, as well as their collection of menarche anecdotes from women psychologists.     

Ambassadors in the community? Labour Party members in society

A political party's members are its ambassadors in the wider community. Based on a survey of Labour party members in Nuneaton, this article investigates the extent to which party members qua party members are visible amongst their friends and colleagues. It finds that there are few closet Labour party members. Most are known to friends and (slightly less commonly) colleagues. Party members also articulate a political message, discussing politics with friends and work colleagues. Around half of party members believe that they influence others as a result of their discussions; of those who are asked their opinions by friends, almost three-quarters believe that they influence others. Labour party members in Nuneaton are thus a visible and articulate manifestation of the party. The article ends by considering whether this is likely to be true in other constituencies, for other parties, and at other times.     

Globalization and the erosion of democracy

Despite the apparent development and spread of liberal democratic state forms in the 1980s and 1990s, possibilities for genuine democratic governance overall are declining. Firstly, the emergence and consolidation of modern liberal democracy was inextricably intertwined with the development of the nation–state and is profoundly socially embedded in that structural context. Secondly, in today's globalizing world, cross–cutting and overlapping governance structures and processes increasingly take private, oligarchic (and mixed public/ private) forms; hegemonic neoliberal norms are delegitimizing state–based governance in general; and democratic states are losing the policy capacity necessary for transforming democratically generated inputs into authoritative outputs. Consequently, robust constraints limit the potential for (a) reinstitutionalizing the 'democratic chain' between accountability and effectiveness, (b) rearticulating the multitasking character of authoritative institutions and (c) renewing the capacity of authoritative agents to make the side–payments and to undertake the monitoring necessary to control free–riding and assimilate alienated groups. Rather than a new pluralistic global civil society, globalization is more likely to lead to a growth in inequalities, a fragmentation of effective governance structures and the multiplication of quasi–fiefdoms reminiscent of the Middle Ages.     

School Socioeconomic Contexts and Adolescent Self-Descriptions in India

Many Western developmental theorists (e.g., Baumeister, 1986; Erikson, 1968) propose an increasingly autonomous self-construal during adolescence (e.g., Erikson, 1968). In this study self-construal among 191 older children and young adolescents (ages 9 through 16) from private and public schools in Madras, India, was assessed by means of the self attitudes instrument (Kuhn and McPartland, 1954) and the scoring system of Trafimow et al. (1991). Individuality in self-construal did not increase with age across all groups but was mediated by socioeconomic strata (SES, as indexed by school) and gender. Boys from high SES schools best conformed to the Western conceptualization of self-concept development. Boys from lower SES schools exhibited opposite patterns with higher group responses in the older age group. The findings highlight the importance of social context in individual development.     

The rise and fall of the legal expert system†

Those very few of us who were critical of the rise of legal expert systems in the early 1980s probably wonder, in idle moments, whether there is a possibility of rejuvenation of an approach which was once multi-various and is now obscure and esoteric. Is it possible that after rising and falling, that legal expert system research programme could rise again? What were the conditions which gave impetus to the field and could they be repeated? In this article I want to return, with a personal viewpoint, on the rise of expert systems and why - despite their failure - the appeal of commoditising legal expertise continues to allure the unwary.