Revised stratigraphy of the Cookson Group in eastern Maine and southwestern New Brunswick: an alternate view

Fossil evidence reported by Fyffe and Riva (1990) requires inversion of the stratigraphic succession originally proposed for the St. Croix Terrane (Ludman, 1987). Other suggested revisions, however, are not in accord with structural and sedimentologic data in eastern Maine. Comparison of structural histories indicates that the Pocomoonshine Lake and Digdeguash formations are more appropriately part of the Frederic ton Belt than of the St Croix Terrane as suggested by fyffe and Riva(1990). An alternate view of the stratigraphic and tectonic relationships between the St Croix Terrane and Fredericton Belt includes the following changes: the Pocomoonshine Lake Formation, originally assigned to the St Croix Terrane, is now considered to be the oldest unit of the Fredericton Belt, lying conformably below the Digdeguash Formation; a late Acadian thrust fault is thought to have transported the St Croix Terrane westward over the Fredericton Belt; subsequent high-angle dip-slip and strike-slip faulting have obscured original relationships—these faults now form the boundary between the two terranes in southeastern Maine. RÉSUMÉ Le témoignage apporté par les fossiles qu'ont signaled Fyffe et Riva (1991) nécessite une inversion de la séquence stratigraphique proposée à l'origine pour la Laniere de St Croix (Ludman, 1987). Cependant, les autres révisions, ayant été suggérées sont en contradiction avec les données stiucturales et séclimentologiques en provenance du Maine oriental. La comparaison des antécédents structuraux indique qu'il est plus adéquat d'incorporer les formations de Pocomoonshine Lake et de Digdeguash a la Ceinture de Fredericton qu'à la Lanière de St. Croix comme l'ont suggéré Fyffe et Riva (1991). Une conception de rechange ayant trait aux relations stratigraphiques et tectoniques entre la Laniere de St Croix et la Ceinture de Fredericton englobe les changements suivants: la Formation de Pocomoonshine Lake, rattachée à l'origine à la Lanière de St Croix, est maintenant tenue pour étant la plus vieille unité au sein de la Ceinture de Fredericton, recouverte en concordance par la Formation de Digdeguash; un chevauchement tardi-acadien est envisagé comme ayant transporté la Lanière de St Croix vers l'ouest par-dessus la Ceinture de Fredericton; le jeu subséquent de décrochements et de failles à rejet selon leur pendage, tous fortement inclines, à obscurci les rapports originaux—ces failles constituent maintenant la frontière entre ces deux lanieres dans le sud-est du Maine. [Traduit par le journal

The psychological effects of major neonatal surgery on infants and their families

This work is the first prospective longitudinal study to investigate the effects of major neonatal surgery on infants born at full term. Over a 3 year period, the intellectual social and emotional development of thirty full-term infants, who underwent major emergency surgery soon after birth, was compared with that of a matched group of twenty-nine healthy newborn babies. An additional group of thirteen full-term neonates, admitted to a neonatal intensive care unit for medical reasons, was included for the study of selected issues, such as the effects of hospitalization and the separation of the mother from her baby. The effects of a sick newborn on the mental health of the mother and on the parental relationship were important aspects of the study. The infants and their families were intensively studied during the first year of life, and followed up when the child reached three years of age. At the 6 month stage there were no significant differences between the groups of infants in terms of developmental progress. At one year however, the development of the 'surgical' babies was significantly delayed in all areas, except for social and gross motor development. During the first year, there was a higher proportion of 'surgical' babies, classified as temperamentally 'difficult', than of the control babies. The early separation of the mother from her baby appeared to have no detrimental effects on the mother-infant relationship. At 3 years of age the surgical children as a group, performed less well on all the tests of cognitive functioning compared to the controls, and their scores on a test of speeded motor skills were significantly slower. Within the surgical group however, the cognitive functioning of the children who required no further treatment after the age of 6 months was comparable with that of the controls. In contrast, the children who had required further hospitalization and/or operative procedures, and those who had persisting medical problems at 3 years of age, were functioning at lower levels than the rest of the group The children in the 'surgical' group as a whole, showed an increased Incidence of behavioural problems, but at this stage there were no differences between the surgical and control groups in the ratings of temperament At three years the 'surgical' mothers tended to be less sensitive, more Indulgent, and more inconsistent in their handling of their children's behaviour. This tendency, together with the increased incidence of behavioural problems in this group, suggest that when the children were 3 years old there were difficulties in the mother-child relationship, in contrast to the findings at 1 year. In conclusion, the findings from the study suggest that full-term babies with abnormalities requiring major neonatal surgery are at risk for behavioural problems in early childhood, and that the cognitive development of children who require further operative procedures or medical treatment, may be adversely affected in the preschool years

Experiences Assisting or Hindering the Academic and Social Integration of African American Students at Southwestern Michigan College

Problem. Attrition rates of minority students in general and African American students in particular have remained high in postsecondary education, particularly at community colleges. To gain information that is most useful for implementing policies and actions that will increase the retention and achievement of minority students, Tinto has maintained that colleges should not rely solely on systems-wide research, but should study their own students. Method. This case study used Tinto’s longitudinal model of institutional departure to investigate the experiences of six African American students at a rural community college in southwestern Michigan. Analysis of the data from a series of semi-structured interviews revealed a variety of experiences that assisted or hindered the academic and social integration o f students at the institution. Findings. Students identified the small number of African American students, the lack of minority faculty and staff, and the absence of courses in African American studies as negative experiences, and the quality of teaching and personal attention on the part of faculty and staff as positive experiences in their time at the college. Five themes run through the experiences of the students in this study: 1. Colleges need enough African American students to support at least some social activities and to provide a sense of belonging. 2) Students sometimes sense a lack of cultural understanding on the part of students, staff, and faculty. 3) Minority students are themselves diverse. 4) Students are aware of sterotypes and their own internal dissonance regarding ethnicity issues. 5) Students prefer classes that provide active learning and personal involvement. Recommendations include adding more culturally relevant materials to the curricula and recognizing the primacy of the classroom as a source of both academic and social interactions for students at commuter colleges

Photonics in photovoltaic systems

This paper gives an overview on photonics for photovoltaic systems. Starting from the spectral and angular distribution of the electromagnetic radiation from the sun, many important optical approaches how to improve the efficiency of solar cells are presented and discussed. Topics include antireflective coatings, various light trapping structures, refractive, reflective and fluorescent concentrators, and components for spectral management. The theoretical background is shortly described and examples of the experimental and also of the commercial realisation are given

Stratigraphy and Structure of Central Maine

Guidebook for field trips in east-central and north-central Maine: 66th annual meeting October 12 and 13, 1974: Trip B-

Targeting the reperfusion injury salvage kinase pathway in the clinical setting

Cardiovascular disease remains the leading cause of morbidity and mortality worldwide. Ischaemic heart disease contributes the largest burden and despite advances in revascularisation therapy significant morbidity and mortality exist in both the elective and emergency treatment setting. Short episodes of sub-lethal ischaemia and reperfusion applied before a period of prolonged ischaemia (preconditioning) and reperfusion stuttered with short episodes of ischaemia (postconditioning) are powerful, endogenous, cardioprotective phenomena which offer the potential to reduce myocardial injury and infarction by as much as 50%. Despite many years of research these mechanical, invasive techniques have not been adopted to routine practice. A pharmacological mimetic, targeting the same protective pathways as pre- and post- conditioning would have great potential in reducing myocardial injury in a number of clinical settings and could be easily administered and adopted to the clinical arena. Chapter 1 of this thesis summarises the research to date in this rapidly evolving field concentrating on two pharmacological conditioning mimetics, atorvastatin and erythropoietin and the clinical assessment of cardioprotection and myocardial salvage. Chapter 2 details the hypotheses to be investigated. Chapter 3 describes two studies undertaken in coronary artery bypass surgery with high dose atorvastatin as a potential cardioprotective agent. Chapter 4 describes a study testing the use of erythropoietin in patients presenting with acute myocardial infarction requiring emergency angioplasty and using cardiac magnetic resonance outcome measures. Chapter 5 highlights the difficulties in translating pre-clinical animal studies to the human clinical setting and discusses potential methods to improve this. In summary, this thesis examines the pre-existing research regarding atorvastatin and erythropoietin as cardioprotective agents. Novel clinical studies testing the use of these agents in the settings of coronary artery bypass surgery and acute myocardial infarction are presented. The findings are discussed and reviewed in the context of ongoing advances in the field of cardioprotection

Provenance and paleogeography of post-Middle Ordovician, pre-Devonian sedimentary basins on the Gander composite terrane, eastern and east-central Maine: implications for Silurian tectonics in the northern Appalachians

Recent mapping in eastern and east-central Maine addresses long-standing regional correlation issues and permits reconstruction of post-Middle Ordovician, pre-Devonian paleogeography of sedimentary basins on the Ganderian composite terrane. Two major Late Ordovician-Silurian depocenters are recognized in eastern Maine and western New Brunswick separated by an emergent Miramichi terrane: the Fredericton trough to the southeast and a single basin comprising the Central Maine and Aroostook-Matapedia sequences to the northwest. This Central Maine/Aroostook-Matapedia (CMAM) basin received sediment from both the Miramichi highland to the east and highlands and islands to the west, including the pre-Late Ordovician Boundary Mountains, Munsungun-Pennington, and Weeksboro-Lunksoos terranes. Lithofacies in the Fredericton trough are truncated and telescoped by faulting along its flanks but suggest a similar basin that received sediment from highlands to the west (Miramichi) and east (St. Croix).Deposition ended in the Fredericton trough following burial and deformation in the Late Silurian, but continued in the CMAM basin until Early Devonian Acadian folding. A westward-migrating Acadian orogenic wedge provided a single eastern source of sediment for the composite CMAM basin after the Salinic/Early Acadian event, replacing the earlier, more local sources. The CMAM, Fredericton, and Connecticut Valley-Gaspé depocenters were active immediately following the Taconian orogeny and probably formed during extension related to post-Taconian plate adjustments. These basins thus predate Acadian foreland sedimentation.Structural analysis and seismic reflection profiles indicate a greater degree of post-depositional crustal shortening than previously interpreted. Late Acadian and post-Acadian strike-slip faulting on the Norumbega and Central Maine Boundary fault systems distorted basin geometries but did not disturb paleogeographic components drastically

Információkeresés könyvtári OPAC-okban: a kereső és a keresési stratégia

Információkeresés könyvtári OPAC-okban: a kereső és a keresési stratégiaBscInformatikus könyvtáro