Leadership for Transforming High Schools

Explores the unique tasks and challenges faced by education leaders in the face of stricter accountability reforms associated with the federal No Child Left Behind legislation and associated state-level education policy initiatives

Leading for Learning: Reflective Tools for School and District Leaders

Provides reflective ideas and tools for educators to enhance leadership in learning. Includes key ideas, real examples, and reflective questions that leaders can use can use to assess their organizations, enact strategic plans, and teach colleagues

When Learning Counts: Rethinking Licenses for School Leaders

Recommends restructuring state licensing systems to focus on the skills and knowledge leaders need to improve learning, and better aligning licenses with the current job demands on principals

Leading for Learning Sourcebook: Concepts and Examples

Provides a detailed discussion of ideas and methods that educators can use to enhance leadership in learning. Offers examples of leaders using the ideas and tools for assessment, planning, and teaching. Includes four annotated longitudinal cases

Leading, Learning, and Leadership Support

Offers a framework for improving learning-focused leadership through the use of data and evidence, reallocation of resources, redefined roles and responsibilities, assessment of leadership performance, better governance, and a focus on high schools

Data-Informed Leadership in Education

Explores ideas, frameworks, and beliefs concerning the use of data in educational decision making and in the work of leaders at state and local levels as it relates to the improvement of teaching and learning

Learning-Focused Leadership and Leadership Support: Meaning and Practice in Urban Systems

Synthesizes three reports on what good education leadership means and how it can best be supported, including the role of the school leader and the transformation of central district offices to focus more on improving instruction. Outlines key practices

Monte Carlo simulation of a Knudsen effusion mass spectrometer sampling system

RATIONALE: Knudsen effusion mass spectrometry (KEMS) shows improved performance with the restricted collimation method of Chatillon and colleagues, which consists of two apertures between the Knudsen cell orifice and the ionizer. These apertures define the shape and position of the molecular beam independently of the sample and effusion orifice and as a result reduce background and improve sampling from the Knudsen cell.Modeling of the molecular beam in restricted collimation allows optimization of the apertures’ diameters and spacing. METHODS:Knudsen flow is easily simulated with a Monte Carlo method. In this study a Visual Basic for Excel (VBA) code is developed to simulate the molecular beam originating from a vaporizing condensed phase in a Knudsen cell and passing through the cell orifice and the two apertures. RESULTS: The code is able to calculate the transmission coefficient through the cell orifice, through the cell orifice and the first aperture, and through the cell orifice and first and second apertures. Also calculated are the angular distributions of the effusate density emerging from the cell and average number of collisions with the orifice walls. CONCLUSIONS: This code allows the geometry (aperture spacing and diameters) of the sampling system to be optimized for maximum transmission. The calculated effusate distributions and low average number of orifice wall collisions illustrated the advantages of restricted collimation. Calculated transmission factors are also compared to literature values calculated via the analytical method of Chatillon and colleagues

Liquid Phase Hydrodechlorination of Dieldrin and DDT over Pd/C and Raney-Ni

Selectivity and product distribution of hydrodechlorination (HDCl) of dieldrin and DDT are studied in different liquid phase systems, namely in: (1) in ethanol; and (2) in the supported ionic liquid heterogeneous catalytic system (multiphase system), composed by the organic phase and aqueous KOH, a quaternary ammonium ionic liquid promoter (Aliquat 336), and a metal catalyst, e.g. 5% Pd/C, 5% Pt/C, or Raney-Ni. At 50 8C and atmospheric pressure of hydrogen, a quantitative hydrodechlorination of DDT in the biphasic system with ionic liquid layer is achieved in 40 min and in 4 h with Raney-Ni and Pd/C, respectively, while the reaction on Pt/C or on Pd/C without Aliquat 336 is slow. Dieldrin undergoes partial dechlorination, with high selectivity achievable only for its mono- and bi-dechlorination products. Dechlorination pathways and reactivity of different types of organic chlorine atoms versus the catalyst nature and other conditions are discussed