8,367 research outputs found
On the Sherlocks, Jane Coleman and County Kildare in the Eighteen Forties
Full text linkIn the late 1980s and early 1990s the author acquired about 30,000 letters written mainly in the 1840s. These pertained to estates throughout Ireland managed by the firm of James Robert Stewart and Joseph Kincaid, hereafter denoted SK. Until the letters – called the SK correspondence in what follows – became the author’s property, they had not seen light of day since the 1840s. Addressed mainly to the firm’s office in Dublin, they were written by landlords, tenants, the partners in SK, local agents, etc. After about 200 years in operation as a land agency, the firm in which members of the Stewart family were the principal partners – Messrs J. R. Stewart & Son(s) from the mid- 1880s onwards – ceased operations in the mid-1980s. Since 1994 the author has been researching the SK correspondence of the 1840s. It gives many new insights into economic and social conditions in Ireland during the decade of the great famine, and into the operation of Ireland’s most important land agency during those years. It is intended ultimately to publish details on several of the estates managed by SK in a study more comprehensive than the present article, in book form. The proposed title is Landlords, tenants, famine: business of an Irish land agency in the 1840s, a draft of which has now been completed. A majority of the letters in that study are on themes some of which one might expect - rents, distraint (seizure of assets in lieu of rent); ‘voluntary’ surrender of land in return for ‘compensation’ upon quitting quietly; formal ejectment (a matter of last resort on estates managed by SK); landlordassisted emigration (on a scale much more extensive than most historians of Ireland in the 1840s appear to believe); petitions from tenants; complaints by tenants, both about other tenants and about local agents; landlord-financed and other relief of distress both before and during the great famine; major works of improvement (on almost all of the estates managed by SK which have been investigated in detail in the draft book); applications by SK, on behalf of landlords, for government loans to finance improvements; recommendations of agricultural advisers hired by SK, etc. Thus, most of the SK correspondence is about aspects of estate management. But the firm of SK was not only a manager of land. The correspondence reveals only two estates in Kildare, each of them relatively small, managed by SK in the 1840s. These were the lands of the Sherlocks near Naas and of Jane Coleman in the Kilcullen district. The correspondence on these properties differs substantively from most of those discussed in detail in the draft of Landlords, tenants, famine: first, it is relatively small in quantity, and secondly, it contains relatively little on the core aspects of estate management indicated above. Much of that on the Sherlocks focuses on misfortunes among family members, while the correspondence on Jane Coleman highlights the benevolence of that proprietor.
Estimation under Multicollinearity: Application of Restricted Liu and Maximum Entropy Estimators to the Portland Cement Dataset
Full text linkA high degree of multicollinearity among the explanatory variables severely impairs estimation of regression coefficients by the Ordinary Least Squares. Several methods have been suggested to ameliorate the deleterious effects of multicollinearity. In this paper we aim at comparing the Restricted Liu estimates of regression coefficients with those obtained by applying the Maximum Entropy Leuven (MEL) family of estimators on the widely analyzed dataset on Portland cement. This dataset has been obtained from an experimental investigation of the heat evolved during the setting and hardening of Portland cements of varied composition and the dependence of this heat on the percentage of four compounds in the clinkers from which the cement was produced. The relevance of the relationship between the heat evolved and the chemical processes undergone while setting takes place is best stated in the words of Woods et al.: "This property is of interest in the construction of massive works as dams, in which the great thickness severely hinder the outflow of the heat. The consequent rise in temperature while the cement is hardening may result in contractions and cracking when the eventual cooling to the surrounding temperature takes place." Two alternative models have been formulated, the one with an intercept term (non-homogenous) that exhibits a very high degree of multicollinearity and the other with no intercept term (extended homogenous) that characterizes perfect multicollinearity. Our findings suggest that several members of the MEL family of estimators outperform the OLS and the Restricted Liu estimators. The MEL estimators perform well even when perfect multicollinearity is there. A few of them may outperform the Minimum Norm LS (OLS+) estimator. Since the MEL estimators do not seek extra information from the analyst, they are easy to apply. Therefore, one may rely on the MEL estimators for obtaining the coefficients of a linear regression model under the conditions of severe (including perfect) multicollinearity among the explanatory variables.Multicollinearity; Estimator; Restricted Liu; Maximum Entropy Leuven estimator; MEL family; Modular Maximum Entropy Leuven estimator; Least Absolute Deviation; Minimum Norm Least Squares; Moore-Penrose inverse; Portland cement dataset
NLINLS: a Differential Evolution based nonlinear least squares Fortran 77 program
Full text linkThis paper provides the list of Fortran 77 codes of nonlinear least squares using Differential Evolution as the minimizer algorithm. It has been tested on a number of difficult nonlinear least squares problems (taken from NIST, USA including CPC-X Software challenge problems). Help on how to use the program also is provided.Nonlinear least squares; Differential Evolution; Fortran 77
Progress and Distress on the Stratford Estate in Clare during the Eighteen Forties
Full text linkIn the late 1980s and early 1990s, the author acquired about 30,000 letters written mainly in the 1840s. These pertained to estates throughout Ireland managed by James Robert Stewart and Joseph Kincaid, hereafter denoted SK. Until the letters - called the SK correspondence in what follows - became the author’s property, they had not seen light of day since the 1840s. Addressed mainly to the SK office in Dublin, they were written mainly by landlords, tenants, the partners in SK, local agents, etc. After about 200 years in operation as a land agency, the firm in which members of the Stewart family were the principal partners - Messrs J. R. Stewart & Son(s) from the mid-1880s onwards -- ceased business in the mid-1980s. Since 1994 the author has been researching the SK correspondence of the 1840s. It gives many new insights into economic and social conditions in Ireland during the decade of the great famine, and into the operation of Ireland’s most important land agency during those years. It is intended ultimately to publish details on several of the estates managed by SK in book form. The proposed title is Landlords, Tenants, Famine: Business of an Irish Land Agency in the 1840s, a draft of which has now been completed. A majority of the letters in the larger study from which the present article is drawn are on themes some of which one might expect - rents, distraint (seizure of assets in lieu of rent) ; ‘voluntary’ surrender of land in return for ‘compensation’ upon peacefully quitting; formal ejectment (a matter of last resort on estates managed by SK); landlord-assisted emigration (on a scale much more extensive than most historians of Ireland in the 1840s appear to believe); petitions from tenants; complaints by tenants, both about other tenants and local agents; major works of improvement (on almost all of the estates managed by SK); applications by SK, on behalf of proprietors, for government loans to finance improvements; recommendations of agricultural advisers hired by SK, ete. Thus, most of the SK correspondence is about aspects of estate management. It seems, in the 1840s, that the only estate in Clare managed by SK was that of the elderly Col. Stratford. Although the files on the relatively small Stratford estate are much less extensive than those on some of the estates investigated in detail in the draft of Landlords, Tenants, Famine, they do refer to most of the core aspects of estate management mentioned above. But in the case of the Clare estate, the material on some of those themes is extremely thin.
Clinical validation and prevalence of the deficit subtype in patients with schizophrenia.
No full textHETEROCLINIC ORBIT ON THE KDV-BURGERS EQUATION AND FISHER EQUATION
No full textThe heteroclinic orbit between the saddle and node points or the saddle and focus points on the KdV-Burgers equation and Fisher equation is analysed. The corresponding travelling wave solutions are obtained.Physics, MultidisciplinarySCI(E)中国科学引文数据库(CSCD)8LETTER4497-5001
ON THE DISPERSION EFFECTS OF ATMOSPHERIC MOTION
No full textIn this paper a set of new Reynolds averaged equations which contain both the dissipation and dispersion effects are derived by using Prandtl's mixing length theory. The following are shown: (a) for the atmospheric motion there exist not only dissipation but also dispersion effects. (b) The dispersion effects alone could result in the inverse energy cascade which represents the eddies giving up kinetic energy to the mean flow in large-scale motion. The dispersion effects are also necessary for the eddies to gain kinetic energy from available potential energy. The necessary and sufficient conditions of an inverse energy cascade are given. (c) The dispersion effects are used to analyse atmospheric balance motions of the planetary boundary layer and produce a more satisfactory Ekman spiral fit to the observed wind hodograph.Geochemistry & GeophysicsMeteorology & Atmospheric SciencesOceanographySCI(E)5ARTICLE1-277-902
Sustained attention deficits in nonpsychotic relatives of schizophrenic patients: a recurrence risk ratio analysis.
No full textChromosomal clustering and GATA transcriptional regulation of intestine-expressed genes in C-elegans
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