Tuning the metamagnetism of an antiferromagnetic metal

We describe a `disordered local moment' (DLM) first-principles electronic structure theory which demonstrates that tricritical metamagnetism can arise in an antiferromagnetic metal due to the dependence of local moment interactions on the magnetisation state. Itinerant electrons can therefore play a defining role in metamagnetism in the absence of large magnetic anisotropy. Our model is used to accurately predict the temperature dependence of the metamagnetic critical fields in CoMnSi-based alloys, explaining the sensitivity of metamagnetism to Mn-Mn separations and compositional variations found previously. We thus provide a finite-temperature framework for modelling and predicting new metamagnets of interest in applications such as magnetic cooling

A critical analysis of tithe and seed sowing on contemporary Christianity in Nigeria

The issues of tithes and seed sowing have taken a central focus in contemporary Christianity in Nigeria among the preachers. Many a time, it is assumed that tithes and seed sowing are requirements for salvation, prosperity and total well-being of the members. Making many to believe that Christianity is a money-venture business one can succeed if he knows how to hoodwink the gullible. Many have been deceived that by parting with a substantial amount of money in the name of sowing seed, their problems would be solved. Unfortunately, the person’s problem may remain the same or even be compounded. This paper evaluates the activities, attitude and their inordinate ambitions. It examines the impact of tithe and seed sowing on Christianity in Nigeria. The research method adopted for this work is the qualitative phenomenological method. The paper observed that the value of tithe and seed sowing has changed from what is prescribed in the bible to what is preached on the pulpits. The study recommends among other things, that these preachers should preach the gospel with decorum and as it were in the bible so that its influence on Nigerians will bring about a reduction in crime, corruption and other immoral activities in Nigeria. Contribution: The article is focused on the issues of tithes and seed sowing. It underscores the fact that the message of tithe and seed sowing has become a means of siphoning members and enriching the preachers. It further reveals its negative and positive impacts such as, the promotion of corruption and fraud in the church and society, contribution to the decline of morality in the church and the society, increasing crime rate and increasing poverty rate in Nigeria among others

Older adults, falls and technologies for independent living: a life space approach

This paper draws attention to the need for further understanding of the fine details of routine and taken-for-granted daily activities and mobility. It argues that such understanding is critical if technologies designed to mitigate the negative impacts of falls and fear-of-falling are to provide unobtrusive support for independent living. The reported research was part of a large, multidisciplinary, multi-site research programme into responses to population ageing in Ireland, Technologies for Independent Living (TRIL). A small, exploratory, qualitative life-space diary study was conducted. Working with eight community-dwelling older adults with different experiences of falls or of fear-of-falls, data were collected through weekly life-space diaries, daily-activity logs, two-dimensional house plans and a pedometer. For some participants, self-recording of their daily activities and movements revealed routine, potentially risky behaviour about which they had been unaware, which may have implications for falls-prevention advice. The findings are presented and discussed around four key themes: ‘being pragmatic’, ‘not just a faller’, ‘heightened awareness and blind spots’ and ‘working with technology’. The findings suggest a need to think creatively about how technological and other solutions best fit with people's everyday challenges and needs and of critical importance, that their installation does not reduce an older adult to ‘just a faller’ or a person with a fear-of-falls

ANTI-CORROSION POTENTIALS OF FRESH EXTRACTS OF OLD PERSEA AMERICANA VAR. AMERICANA SEED IN 0.5 M H2SO4 ON MILD STEEL

An experiment to determine effective corrosion inhibition of fresh extracts from matured seed of Persea Americana var. Americana on mild steel in 0.5 M H2SO4 conditions was carried out using gravimetric and electrochemical methods. The tests were carried out at room temperature for 24 hours, and also for higher temperature from 40oC to 70oC for 3 hours.  The results showed that the seed extracts have appreciable corrosion inhibition potentials which decreased with increase in temperature. Inhibition efficiency showed that it increased with increase in inhibitor concentration across the same temperature, and similarly decreased with increase in temperature within the same concentration range. The experimental data fitted in with the Langmuir isotherm which is an indicator that the extract constituents were adsorbed on the steel surface. The Arrhenius equations showed a general increase implying that physisorption rather than chemisorptions is prevalent. The values of the heat of adsorption are all negative for temperatures at 40oC, indicative of the fact that inhibition efficiency decreases with rise in temperature, a proof that the inhibition trend was physisorption.  At temperatures of 70oC, the values are mixed, some negative and some positive.  This indicates that both physisorption and chemisorptions abound at higher temperatures.  The result from potentiodynamic tests shows that reduction in current potential in the presence of the inhibitor at both concentrations implies that it is a mixed inhibitor. Keywords: Corrosion inhibition; Fresh; Higher temperatures; Langmuir isotherm; Matured; Persea Americana var. Americana. DOI: 10.7176/CMR/13-2-03 Publication date:June 30th 202

Adventurers and authors : an examination of Samuel de Champlain's and Capt. John Smith's writings about the aboriginal peoples of North America

167 leaves ; 28 cm.Includes abstract.Includes bibliographical references (leaves 163-167).This thesis compares the perceptions and observations of the aboriginal people of North America in the writings of Captain John Smith and Samuel de Champlain. Such a study helps to clarify the murky subject of European-North American contact by contrasting the experiences and writings of these two men. At its core it shows that Smith and Champlain occupied an intermediate space between the worlds of Europe and America, on which they could build a foundation for the European outposts of Jamestown and Port Royal. However, not only did they occupy this space physically, but this thesis also demonstrates that they sought to occupy this space rhetorically as well. In order to show this, the subject has been approached with "absolute simultaneity," meaning that both the North American and European contexts have been taken into consideration. This approach helps to offset the polemics that some scholars have used in this field by either seeing these men as 'national heroes' or couching their discussion in moralistic language. At the most fundamental level in this thesis all parties have been treated as fully human--having been influenced and influencing, having made rational and irrational choices, and defying simplistic categorization