Critique [of Ethical Problems in Evaluation Research]

Johnson’s paper contains four assumptions which deserve further attention, especially in the context of ethnic minorities. These four assumptions are both obvious and at the root of the ethical problems: 1) Minorities need services; 2) services are to be provided by the dominant group; 3) the providing of services must be evaluated for cost-effectiveness; and 4) the evaluators are more likely to come from the dominant group than the minority group and hence be more powerful than those being evaluated. This, then, leads to the basic problem addressed by Johnson: How can this evaluation process occur such that the rights and privileges of the minority are protected? Phrased another way, how can this process occur without the dominant group using its power over the minority group

Conservative Policies and Women\u27s Power

The recent setbacks imposed on the feminist movement by the forces of the New Right have led women to an increased understanding of the importance of power in maintaining male dominance. Although men exercise power over women in a variety of ways, a review of the findings of social psychology indicates that almosL all types of power derive from men\u27s activities in the public sphere. The exercise of power has become a part of the male gender role and a primary source of men\u27s identity and self esteem. The feminist movement\u27s challenge to men\u27s exclusive hold on the public sphere and its efforts to appropriate the sources of male power for women have provoked a massive retaliation from conservatives which is reflected in the policies of the Reagan Administration

Own Group Bias: The Effects of Individual Competence and Group Outcome

Although much human interaction occurs in intergroup situations, few studies have examined the effects of individual and group outcomes on attitudes toward own and other group. The present study examined the effects of individual and group competence on attraction toward own and other group. The task was a simulated football game whose outcomes for individual and for group were manipulated by the experimenter. Prior to engaging in the contest, team members displayed an own group bias. Furthermore, winning increased the preference for own group and losing decreased this preference. Winning or losing more than one game had little effect on any of the dependent measures. High competent players expressed greater enjoyment of the game and the part they played in it than low competent players, but they did not exhibit greater OGB

A tribute to Stanley E. Seashore

http://deepblue.lib.umich.edu/bitstream/2027.42/86737/1/astannen-Tribute.pd

Upper limit on the transition temperature for non-ideal Bose gases

In this paper we show that for a non-ideal Bose gas there exists an upper limit on the transition temperature above which Bose-Einstein condensation cannot occur regardless of the pressure applied. Such upper limits for some realistic Bose gases are estimated. This result implies that there may also exist an upper limit on the transition temperature of superconductors.Comment: 7 pages, 1 figur

Information structure: linguistic, cognitive, and processing approaches

Language form varies as a result of the information being communicated. Some of the ways in which it varies include word order, referential form, morphological marking, and prosody. The relevant categories of information include the way a word or its referent have been used in context, for example whether a particular referent has been previously mentioned or not, and whether it plays a topical role in the current utterance or discourse. We first provide a broad review of linguistic phenomena that are sensitive to information structure. We then discuss several theoretical approaches to explaining information structure: information status as a part of the grammar; information status as a representation of the speaker’s and listener’s knowledge of common ground and/or the knowledge state of other discourse participants; and the optimal systems approach. These disparate approaches reflect the fact that there is little consensus in the field about precisely which information status categories are relevant, or how they should be represented. We consider possibilities for future work to bring these lines of work together in explicit psycholinguistic models of how people encode information status and use it for language production and comprehension

Enhancement of cellulosome-mediated deconstruction of cellulose by improving enzyme thermostability

Background: The concerted action of three complementary cellulases from Clostridium thermocellum, engineered to be stable at elevated temperatures, was examined on a cellulosic substrate and compared to that of the wild-type enzymes. Exoglucanase Cel48S and endoglucanase Cel8A, both key elements of the natural cellulosome from this bacterium, were engineered previously for increased thermostability, either by SCHEMA, a structure-guided, site-directed protein recombination method, or by consensus-guided mutagenesis combined with random mutagenesis using error-prone PCR, respectively. A thermostable β-glucosidase BglA mutant was also selected from a library generated by error-prone PCR that will assist the two cellulases in their methodic deconstruction of crystalline cellulose. The effects of a thermostable scaffoldin versus those of a largely mesophilic scaffoldin were also examined. By improving the stability of the enzyme subunits and the structural component, we aimed to improve cellulosome-mediated deconstruction of cellulosic substrates. Results: The results demonstrate that the combination of thermostable enzymes as free enzymes and a thermostable scaffoldin was more active on the cellulosic substrate than the wild-type enzymes. Significantly, “thermostable” designer cellulosomes exhibited a 1.7-fold enhancement in cellulose degradation compared to the action of conventional designer cellulosomes that contain the respective wild-type enzymes. For designer cellulosome formats, the use of the thermostabilized scaffoldin proved critical for enhanced enzymatic performance under conditions of high temperatures. Conclusions: Simple improvement in the activity of a given enzyme does not guarantee its suitability for use in an enzyme cocktail or as a designer cellulosome component. The true merit of improvement resides in its ultimate contribution to synergistic action, which can only be determined experimentally. The relevance of the mutated thermostable enzymes employed in this study as components in multienzyme systems has thus been confirmed using designer cellulosome technology. Enzyme integration via a thermostable scaffoldin is critical to the ultimate stability of the complex at higher temperatures. Engineering of thermostable cellulases and additional lignocellulosic enzymes may prove a determinant parameter for development of state-of-the-art designer cellulosomes for their employment in the conversion of cellulosic biomass to soluble sugars

Sacrocolpopexy without concomitant posterior repair improves posterior compartment defects

The aim of this study is to determine posterior compartment topography 1-year after sacrocolpopexy (SC). Women who had SC without concomitant anterior or posterior repairs for symptomatic pelvic organ prolapse (POP) were included. Vaginal topography was assessed at baseline and 1-year postoperatively using POP quantification (POPQ). At baseline, 24% had stage IV POP, 68% stage III, and 8% stage II. One year after surgery, 75% had stage 0/I POP, 24% stage II, and 1% stage III. 112 (75%) were objectively cured (stage 0 or I POP). Anterior compartment was the most common site of POP persistence or recurrence (Ba ≥ stage II in 23 women) followed by posterior compartment (Bp ≥ stage II in 12 women) and apex (C ≥ stage II in 2 women). In 1-year follow-up, SC without concomitant posterior repair restores posterior vaginal topography in the majority of women with undergoing SC

Soft systems methodology: a context within a 50-year retrospective of OR/MS

Soft systems methodology (SSM) has been used in the practice of operations research and management science OR/MS) since the early 1970s. In the 1990s, it emerged as a viable academic discipline. Unfortunately, its proponents consider SSM and traditional systems thinking to be mutually exclusive. Despite the differences claimed by SSM proponents between the two, they have been complementary. An extensive sampling of the OR/MS literature over its entire lifetime demonstrates the richness with which the non-SSM literature has been addressing the very same issues as does SSM