A study of industrial arts in the school systems of Massachusetts.

Thesis (Ed.M.)--Boston Universit

George Mann and Lisa Anne Clay in a Junior Voice Recital

This is the program for the joint junior voice recital of tenor George Mann and soprano Lisa Anne Clay. Pianist Karen Claiborne accompanied Mann, and pianist Ron Davis assisted Clay. The recital took place on April 15, 1976, in the Mabee Fine Arts Center Recital Hall

Influence of Crop Rotation, Tillage, and Management Inputs on Weed Seed Production

Approaches to crop production that successfully reduce weed seed production can benefit farming systems by reducing management inputs and costs. A 5-yr rotation study was conducted in order to determine the effects that interactions between crop rotation, tillage, and amount of herbicide and fertilizer (management inputs) have on annual grass and broad-leaved weed seed production and fecundity. There were 10 crop rotation and tillage system combinations and three levels of management inputs (high, medium, and low). Green and yellow foxtail were the major weed species, and together they yielded between 76 and 93% of collected weed seeds. From 1990 to 1994, average grass weed seed productions were 7.3 by 103, 3.7 by 103 6.1 by 103 and 5.7 by 103 seeds m−-2, whereas average broad-leaved weed seed productions were 0.4 by 103, 0.4 by 103, 1.4 by 103, and 0.4 by 103 seeds m−-2 in crop rotations using conventional tillage (moldboard plow), conservation tillage, no tillage, and ridge tillage, respectively. Crop rotations using conventional or ridge tillage consistently produced more grass and broad-leaved weed seeds, especially in low-input plots. There was little difference in weed seed production among input levels for crop rotations using conservation tillage. Comparing rotations that began and ended with a corn crop revealed that by increasing crop diversity within a rotation while simultaneously reducing the amount of tillage, significantly fewer grass and broad-leaved weed seeds were produced. Among the rotations, grass and broad-leaved weed fecundity were highly variable, but fecundity declined from 1990 to 1994 within each rotation, with a concomitant increase in grass and broad-leaved weed density over the same period. Crop rotation in combination with reduced tillage is an effective way of limiting grass and broad-leaved weed seed production, regardless of the level of management input applied

The Evolving Nature of the Computer Self-Efficacy Construct: An Empirical Investigation of Measurement Construction, Validity, Reliability and Stability Over Time.

This paper reports an empirical study intended to provide detailed comparisons amongst and between the varieties of available measures of computer self-efficacy (CSE). Our purpose is to ascertain their relative abilities to isolate the CSE construct from other related constructs and to capture variance in performance attributed to changes in CSE level. In addition, we investigate the importance of ensuring the measure being used is sufficiently aligned with the task domain of interest. Finally, we explore the stability of CSE measures as they relate to the current state of evolution within the computing domain. Marakas, Yi, and Johnson (1998) proposed a framework for the construction of instruments intended to measure the CSE construct that we have adopted as a basis for this series of investigations. To that end, we advance and test a set of hypotheses derived from the Marakas et al. (1998) framework. Results of the analyses support the need for adherence to the tenets of the proposed framework as well as provide evidence that CSE measures suffer from degradation of their explanatory power over time. Further, this study brings forth the importance of appropriately validating measures of CSE using approaches intended for a formative rather than a reflective construct. These results suggest that the common practices of instrument validation and reuse of long-standing instruments to measure CSE may not be the most effective approach to the study of the construct. Implications for future research are discussed

Strategy for encoding and comparison of gene expression signatures

EXALT (EXpression signature AnaLysis Tool) enables comparisons of microarray data across experimental platforms and different laboratories

From Hopf algebra to braided L∞L_\infty-algebra

We show that an $L_\infty$-algebra can be extended to a graded Hopf algebra with a codifferential. Then we twist this extended $L_\infty$-algebra with a Drinfel'd twist, simultaneously twisting its modules. Taking the $L_\infty$-algebra as its own (Hopf) module, we obtain the recently proposed braided $L_\infty$-algebra. The Hopf algebra morphisms are identified with the strict $L_\infty$-morphisms, while the braided $L_\infty$-morphisms define a more general $L_\infty$-action of twisted $L_\infty$-algebras.Comment: to appear in the Special Issue of Universe on "Dualities and Geometry

Formování učitelů pro budoucnost: „vysoký status, vysoké standardy“

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Documents Relating to the Boundary Line Between Maine and New Brunswick

In 1825, the Legislature of the Commonwealth of Massachusetts in concurrence with the Legislature of the State of Maine, requested that George W. Coffin, the Land Agent for the State of Maine, ...take effectual measures to ascertain the extent of the depredations committed on the lands belonging to this Commonwealth and the State of Maine, by whom the same have been committed, and under what authority, if any, such depredations have been made, and all other facts necessary to bring the offenders to justice, also to make and execute good and sufficient deeds, conveying to the settlers on the undivided public lands on the St. Johns and Madawaska Rivers, in actual possession as aforesaid, their heirs or assigns, 100 acres each, of the land by them possessed, to include their improvements on their respective lots, they paying to the said agents for the use of this Commonwealth, five dollars each, and the expense of surveying the same. And also to sell the timber on such of the undivided public lands, as lie contiguous to and near to the waters of the River St. Johns, in all cases where such sale will, in the opinion of the Land Agent, promote the interest of this Commonwealth. The survey was not without controversy. This pamphlet contains documents pertaining to the survey.https://digitalcommons.library.umaine.edu/mainebicentennial/1087/thumbnail.jp

Detecting attitudinal changes about death and dying as a result of end-of-life care curricula for medical undergraduates

BACKGROUND: There is heightened emphasis on teaching end-of-life (EOL) care in the medical school curriculum, but a relative paucity of tools focused on assessing key attitudinal changes due to curricula. OBJECTIVE: We sought to evaluate the responsiveness of two validated measures of relevant attitudes to changes caused by two EOL curricula: a year-long Elective and a day-long Inter-Clerkship for medical undergraduates. DESIGN: A case control design (n = 100) and a one group pretest-posttest design (n = 98) were used to ask: (1) Are these two attitudinal measures responsive to changes induced by two undergraduate EOL curricula? (2) Do these two curricula have an additive effect (i.e., taking both yields a stronger attitudinal change than taking only one)? (3) Are there attitudinal and sociodemographic differences between students who took the year-long elective EOL course and those who did not? SUBJECTS: Undergraduate medical students. MEASUREMENTS: Two self-report measures: Concept of a Good Death and Concerns about Dying. RESULTS: Compared to nonelective participants, Elective participants reported less concern about working with dying patients at the end of the course and increased their valuation of clinical criteria in thinking about a good death. There were trends suggesting decreased general concern about dying and increased valuation of closure, and an interaction suggesting a larger impact on those with higher precourse concern scores. There were no differences between elective and nonelective participants at baseline. The Interclerkship increased students\u27 valuation of personal control aspects of death, and there was a trend in reducing concerns about working with dying patients. We did not find an additive effect of taking both curricula. CONCLUSIONS: We conclude that both measures were responsive to the relatively large effects this study would have been able to detect, and may be useful in future research to substantiate the effectiveness of EOL curricula in influencing attitudes and level of comfort with death and dying