Suchergebnisse

This study, investigating teaching style, was conducted as part of a curriculum development and research effort aimed at teaching students conceptualized skills considered useful in the analysis of public controversial issues. Approximately 220 junior students entering into an American history-problems of democracy two-year course sequence were taught the conceptualized analytic skills. Four teachers learned three teaching styles; namely, recitation, seminar, and socratic, The teachers used the three styles with small groups of students in discussions of case studies involving public controversial issues, In the discussions students were expected to use the analytic skills taught to them. This study investigated whether there was a differential impact of the three styles on student use of the analytic skills, Audio-tape recordings were made of "teacher-led" group discussions for analysis to determine whether the teachers were able to conform in their behavior to the three teaching styles, Additionally, tape recordings were made of "teacher-led" discussions (i.e., without tho presence of the teacher) for analysis to determine whether there was a differential impact of teaching style on student use of the analytic skills. An instrument for systematic observation of teaching behavior, adopted from an earlier similar study conducted at Harvard University, was used to determine whether the teachers conformed to the style models. Group discussions of issues in three case studies were scored by two trained observers using the observation system. A chi-square goodness-of-fit test was made to check inter-observer agreement in scoring. It was confirmed that the two observers were generally in agreement--of 288 chi-square computations, 47 were below the .50 acceptable probability level (not .05, as in the more common test of significance). The results obtained by the two observers were then analyzed using a three-way analysis of variance--teaching style by teacher by observation system category. It was determined that an overall style difference occurred although certain hypothesized category differences for the three styles failed to materialize. Individual category analyses showed significant style differences occurred in 9 of 15 categories. It was concluded that the four teachers were generally able to conform in their behavior to the three teaching styles. Next an analytic content observation system (ACOS) was developed to determine whether there was a differential impact of teaching style on student use of the analytic concepts. Two observers learned to use the system and scored the tape recordings of "teacher-less" discussions for three case studies. Again, chi-square provided the necessary test to determine whether the scorers were in agreement in their categorizations of student interacts considered to reflect student learning of the analytic skills. Only 1 of 72 chi-squares computed fell below the acceptable .50 probability level. A three-way analysis of variance was used--style by teacher by observation system category, to test for a differential impact of style. It was determined that no overall difference occurred among the three styles in student use of the analytic skills. There were, however, style differences reported for 1 of 16 categories. Further, an overall interaction of style and teacher was reported; an interaction of style and teacher occurred in three categories. It was concluded that, with the category exceptions noted, the study failed to show a differential impact of teaching style on student learning of the conceptualized analytic skills.

Finance is a critical issue for municipal governments around the world and a major constraint on the delivery of pro-poor services at the local level. In many countries decentralisation has brought the issue of municipal finance to the fore. This sourcebook provides a framework for analysing municipal finance capacity and ways of addressing financial constraints. The ideas come from real-life innovative practice in four countries - India Brazil Kenya and Uganda - with additional examples from elsewhere. Emphasis is given to how those innovations and improvements were developed and sustained. T

Finance is a critical issue for municipal governments around the world and a major constraint on the delivery of pro-poor services at the local level. In many countries decentralisation has brought the issue of municipal finance to the fore. This sourcebook provides a framework for analysing municipal finance capacity and ways of addressing financial constraints. The ideas come from real-life innovative practice in four countries - India Brazil Kenya and Uganda - with additional examples from elsewhere. Emphasis is given to how those innovations and improvements were developed and sustained. T.

A prominent jet-driven outflow of CO(2-1) molecular gas is found along the kinematic minor axis of the Seyfert 2 galaxy ESO 420-G13, at a distance of 340-600 pc from the nucleus. The wind morphology resembles the characteristic funnel shape, formed by a highly collimated filamentary emission at the base, and likely traces the jet propagation through a tenuous medium, until a bifurcation point at 440 pc. Here the jet hits a dense molecular core and shatters, dispersing the molecular gas into several clumps and filaments within the expansion cone. We also trace the jet in ionised gas within the inner ≲ 340 pc using the [Ne » II]12.8 μm line emission, where the molecular gas follows a circular rotation pattern. The wind outflow carries a mass of ∼8 × 106 M⊙ at an average wind projected speed of ∼160 km s-1, which implies a mass outflow rate of ∼14 M⊙ yr-1. Based on the structure of the outflow and the budget of energy and momentum, we discard radiation pressure from the active nucleus, star formation, and supernovae as possible launching mechanisms. ESO 420-G13 is the second case after NGC 1377 where a previously unknown jet is revealed through its interaction with the interstellar medium, suggesting that unknown jets in feeble radio nuclei might be more common than expected. Two possible jet-cloud configurations are discussed to explain an outflow at this distance from the AGN. The outflowing gas will likely not escape, thus a delay in the star formation rather than quenching is expected from this interaction, while the feedback effect would be confined within the central few hundred parsecs of the galaxy. ; With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737)

This is the final version. Available from Elsevier / Pergamon via the DOI in this record. ; The diamondback moth, Plutella xylostella, is a damaging pest of cruciferous crops, and has evolved resistance to many of the insecticides used for control, including members of the diamide class. Previous work on the molecular basis of resistance to diamides has documented mutations in the target-site, the ryanodine receptor, in resistant populations of P. xylostella worldwide. In contrast the role of metabolic resistance to this insecticide class is significantly less clear. Here we show that overexpression of a flavin-dependent monooxgenase (FMO) confers resistance to the diamide chlorantraniliprole in P. xylostella. Transcriptome profiling of diamide resistant strains, with and without target-site resistance, revealed constitutive over-expression of several transcripts encoding detoxification enzymes compared to susceptible strains. Two of these, CYP6BG1, and PxFMO2 were particularly highly overexpressed (33,000 and 14,700-fold, respectively) in a resistant strain (HAW) lacking target-site resistance. After 17 generations without diamide selection the resistance of the HAW strain fell by 52-fold and the expression of PxFMO2 by > 1300-fold, however, the expression of CYP6BG1 declined by only 3-fold. Generation of transgenic Drosophila melanogaster expressing these genes demonstrated that PxFMO2, but not CYP6BG1, confers resistance in vivo. Overexpression of PxFMO2 in the HAW strain is associated with mutations, including a putative transposable element insertion, in the promoter of this gene. These enhance the expression of a reporter gene when expressed in a lepidopteran cell line suggesting they are, at least in part, responsible for the overexpression of PxFMO2 in the resistant strain. Our results provide new evidence that insect FMOs can be recruited to provide resistance to synthetic insecticides. ; European Union Horizon 2020 ; Biotechnology and Biological Sciences Research Council (BBSRC) ; Biotechnology and Biological Sciences Research Council (BBSRC) ; Biotechnology and Biological Sciences Research Council (BBSRC)