Circuit prevents overcharging of secondary cell batteries

Circuit prevents battery cell overcharging by detecting and reducing the charging voltage to the open-circuit voltage of the battery when this current falls to a predetermined value. The voltage control depends on the fact that the charging current falls significantly when the battery nears its fully charged state

Social mobility, marriage and kinship among some gentry and yeoman families of Wantage Hundred, c. 1520 - c. 1670

The core of this thesis is the study of 12 gentry and yeoman families resident in Wantage Hundred between 1522 and 1670. Particular attention will be paid to the 4 main strategies of land acquisition, marriage, office-holding and education that could be adopted by each family group for advancement. In conjunction with this the pattern of social mobility within the families will be examined to determine what if any influence such strategies had on social status. The desire for any social elevation will be analysed to examine the notion that all yeoman were actively striving towards a gentry status, and that the gentry themselves were looking towards an aristocratic title. The actual title of `gentleman' and `yeoman' will be examined and their usage in this area analysed, and in particular the way the titles became accepted for merchants and tradesmen. The terms `open' and `closed' originally used to define nineteenth century parishes have been applied to Tudor and Stuart England. This hypothesis has been used to suggest that a resident gentry family could regulate the inflow of new families and could effectively `close' the parish to outside influences and stifle any upward social movement by the local yeoman families. In a parish without a resident gentry family it has been suggested that the opposite is true. New families could freely enter the community, and, more importantly, a yeoman family could control the parish, and, through recognition of local influence gain in social status. This hypothesis and its applicability to Wantage Hundred, will be examined and an assessment made as to whether it had any discernible effect on patterns of social mobility in the area. It can be deduced that throughout the period acquisition and ownership of land through purchase or marriage remained the paramount means of social advancement. Even so all the families used all the suggested strategies of advancement at some time during the period. However, it is apparent that not all families were actively striving for social advancement, particularly as differentiation between yeoman, merchant and gentleman became more blurred in the seventeenth century. In general it appears that yeoman families had greater opportunities for advancement and office-holding in open parishes

Evaluation of the local employment impacts of enterprise zones: A critique

Enterprise zone policy is a potential tool for the regeneration of distressed areas, based primarily on tax incentives to businesses locating in the target areas. The tool has been tested in several countries over more than 35 years but there is no consensus on whether or not it is effective and efficient in creating jobs and reducing unemployment in targeted localities. This paper reviews seminal enterprise zone evaluations in the UK, USA and France. More than one-half of the studies reported local employment benefits but the others reported none and information is limited on what affects policy success. The paper argues that typically narrow-focus research designs and a-theoretical evaluation have contributed to the lack of consensus and policy insight, potentially exacerbated by non-exact data. It proposes richer evaluations with explicit theoretical frameworks, such as the one presented in the paper, more comparative work and the use of more accurate data

Offspring of parents with recurrent depression: which features of parent depression index risk for offspring psychopathology?

Background: Parental depression is associated with an increased risk of psychiatric disorder in offspring, although outcomes vary. At present relatively little is known about how differences in episode timing, severity, and course of recurrentdepression relate to risk in children. The aim of this study was to consider the offspring of parents with recurrentdepression and examine whether a recent episode of parental depressionindexesrisk for offspringpsychopathology over and above these other parental depressionfeatures. <p/>Methods: Three hundred and thirty seven recurrently depressed parents and their offspring (aged 9–17) were interviewed as part of an ongoing study, the ‘Early Prediction of Adolescent Depression Study’. The Child and Adolescent Psychiatric Assessment was used to assess two child outcomes; presence of a DSM-IV psychiatric disorder and number of DSM-IV child-rated depression symptoms. <p/>Results: Children whose parents had experienced a recent episode of depression reported significantly more depression symptoms, and odds of child psychiatric disorder were doubled relative to children whose parents had not experienced a recent episode of depression. Past severity of parental depression was also significantly associated with child depression symptoms. <p/>Limitations: Statistical analyses preclude causal conclusions pertaining to parental depression influences on offspringpsychopathology; several features of parental depression were recalled retrospectively. <p/>Conclusions: This study suggests that particular features of parental depression, specifically past depression severity and presence of a recent episode, may be important indicators of risk for child psychiatric disorder and depressive symptoms

Evolution of the Radio Remnant of Supernova 1987A: Morphological Changes from Day 7000

We present radio imaging observations of supernova remnant 1987A at 9 GHz, taken with the Australia Telescope Compact Array over 21 years from 1992 to 2013. By employing a Fourier modeling technique to fit the visibility data, we show that the remnant structure has evolved significantly since day 7000 (mid-2006): the emission latitude has gradually decreased, such that the overall geometry has become more similar to a ring structure. Around the same time, we find a decreasing trend in the east-west asymmetry of the surface emissivity. These results could reflect the increasing interaction of the forward shock with material around the circumstellar ring, and the relative weakening of the interaction with the lower-density material at higher latitudes. The morphological evolution caused an apparent break in the remnant expansion measured with a torus model, from a velocity of 4600+150-200 km/s between day 4000 and 7000 to 2400+100-200 km/s after day 7000. However, we emphasize that there is no conclusive evidence for a physical slowing of the shock at any given latitude in the expanding remnant, and that a change of radio morphology alone appears to dominate the evolution. This is supported by our ring-only fits which show a constant expansion of 3890+/-50 km/s without deceleration between days 4000 and 9000. We suggest that once the emission latitude no longer decreases, the expansion velocity obtained from the torus model should return to the same value as that measured with the ring model.Comment: 11 pages, 5 figures, accepted for publication in ApJ, Figure 1 has been scaled dow