Optimal Estimation of Several Linear Parameters in the Presence of Lorentzian Thermal Noise

In a previous article we developed an approach to the optimal (minimum variance, unbiased) statistical estimation technique for the equilibrium displacement of a damped, harmonic oscillator in the presence of thermal noise. Here, we expand that work to include the optimal estimation of several linear parameters from a continuous time series. We show that working in the basis of the thermal driving force both simplifies the calculations and provides additional insight to why various approximate (not optimal) estimation techniques perform as they do. To illustrate this point, we compare the variance in the optimal estimator that we derive for thermal noise with those of two approximate methods which, like the optimal estimator, suppress the contribution to the variance that would come from the irrelevant, resonant motion of the oscillator. We discuss how these methods fare when the dominant noise process is either white displacement noise or noise with power spectral density that is inversely proportional to the frequency ($1/f$ noise). We also construct, in the basis of the driving force, an estimator that performs well for a mixture of white noise and thermal noise. To find the optimal multi-parameter estimators for thermal noise, we derive and illustrate a generalization of traditional matrix methods for parameter estimation that can accommodate continuous data. We discuss how this approach may help refine the design of experiments as they allow an exact, quantitative comparison of the precision of estimated parameters under various data acquisition and data analysis strategies.Comment: 16 pages, 10 figures. Accepted for publication in Classical and Quantum Gravit

CS 638 Ethics of Community

Bonhoeffer, Dietrich. Life Together (HarperSanFrancisco, 1954) Hallie, Philip. Lest Innocent Blood be Shed (HarperPerennial, 1979, 1994) Lohfink, Gerhard. Jesus and Community (Fortress, 1984) Putnam, Robert. Bowling Alone (Simon & Schuster, 2000) Rice, Chris. Grace Matters (Jossey-Bass, 2002) Vanier, Jean. Community and Growth (Paulist, 1989) Volf, Miroslav, and Dorothy Bass, Practicing Theology (Eerdmans, 2002), selections: read pages 1-48, 94-181, 206-227, 245-263.https://place.asburyseminary.edu/syllabi/3655/thumbnail.jp

Bulk, rare earth and other trace elements in Apollo 14 and 15 and Luna 16 samples

The chemical abundances were measured by instrumental and radiochemical neutron activation analysis in a variety of lunar specimens. Apollo 14 soils are characterized by significant enrichments of Al2O3, Na2O and K2O and depletions of TiO2, FeO, MnO and Cr2O3 relative to Apollo 11 and to most of Apollo 12 soils. The uniform abundances in 14230 core tube soils and three other Apollo 14 soils indicate that the regolith is uniform to at least 22 cm depth and within approximately 200 m from the lunar module. Two Luna 16 breccias are similar in composition to Luna 16 soils. Four Apollo 15 soils (LM, STA 4, 9, and 9a) have variable compositions. Interelement correlations between MnO-FeO, Sc-FeO, V-Cr2O3 and K2O-Hf negate the hypothesis that howardite achondrites may be primitive lunar matter, argue against the fission hypothesis for the origin of the moon, and precludes any selective large scale volatilization of alkalies during lunar magmatic events

AN EXAMINATION OF MANAGERIAL STRATEGIES FOR INCREASING INFORMATION TECHNOLOGY PENETRATION IN ORGANIZATIONS

This paper describes an empirical study comparing two competing perspectives for explaining information technology (IT) penetration in organizations. IT penetration is defined as the extent to which IT is embedded within an organization\u27s strategic, managerial, and operational work systems. With the first perspective, IT penetration is hypothesized to be related to the implementation of a comprehensive set of management processes for the information systems (IS) function. With the second perspective, IT penetration is hypothesized to be related to the effectiveness of IT-related interactions among an organization\u27s managers, To strengthen the study\u27s research design, the hypotheses are examined separately across two samples of organizations. Senior ]S executives completed the study\u27s research instrument. Respondents in the first sample represented 132 large organizations across a variety of industries, while the respondents in the second sample represented 44 business units within a large, high teChnology firm. IT penetration and IT-related managerial interactions were measured at a subunit level, while IS management processes were measured at an organizational level. The study\u27s findings supported the research hypotheses. *The authors wish to thank Omar El Sawy and anonymous reviewers for their helpful comments on earlier drafts of this paper

Health seeking behaviour and challenges in utilising health facilities in Wakiso district, Uganda

Background: The health seeking behaviour of a community determines how they use health services. Utilisation of health facilities can be influenced by the cost of services, distance to health facilities, cultural beliefs, level of education and health facility inadequacies such as stock-out of drugs.Objectives: To assess the health seeking practices and challenges in utilising health facilities in a rural community in Wakiso district, Uganda.Methods: The study was a cross sectional survey that used a structured questionnaire to collect quantitative data among 234 participants. The sample size was obtained using the formula by Leslie Kish.Results: While 89% of the participants were aware that mobile clinics existed in their community, only 28% had received such services in the past month. The majority of participants (84%) did not know whether community health workers existed in their community. The participants’ health seeking behaviour the last time they were sick was associated with age (p = 0.028) and occupation (p = 0.009). The most significant challenges in utilising health services were regular stock-out of drugs, high cost of services and long distance to health facilities.Conclusions: There is potential to increase access to health care in rural areas by increasing the frequency of mobile clinic services and strengthening the community health worker strategy.Key words: Health seeking behaviour, Rural community, Health facilities, Challenges, Ugand

A New Version of Reimers' law of Mass Loss Based on a Physical Approach

We present a new semi-empirical relation for the mass loss of cool stellar winds, which so far has frequently been described by "Reimers' law". Originally, this relation was based solely on dimensional scaling arguments without any physical interpretation. In our approach, the wind is assumed to result from the spill-over of the extended chromosphere, possibly associated with the action of waves, especially Alfven waves, which are used as guidance in the derivation of the new formula. We obtain a relation akin to the original Reimers law, but which includes two new factors. They reflect how the chromospheric height depends on gravity and how the mechanical energy flux depends, mainly, on effective temperature. The new relation is tested and sensitively calibrated by modelling the blue end of the Horizontal Branch of globular clusters. The most significant difference from mass loss rates predicted by the Reimers relation is an increase by up to a factor of 3 for luminous late-type (super-)giants, in good agreement with observations.Comment: 12 pages, 4 figures, accepted by ApJ Letter

Multiple case-study analysis of quality management practices within UK Six Sigma and non-Six Sigma manufacturing small- and medium-sized enterprises

This paper examines multiple case-study analysis of quality management practices within UK Six Sigma and non-Six Sigma manufacturing small- and medium-sized enterprises

Stoichiometry, structure, and transport in the quasi-one-dimensional metal, Li(0.9)Mo(6)O(17)

A correlation between lattice parameters, oxygen composition, and the thermoelectric and Hall coefficients is presented for single-crystal Li(0.9)Mo(6)O(17), a quasi-one-dimensional (Q1D) metallic compound. The possibility that this compound is a compensated metal is discussed in light of a substantial variability observed in the literature for these transport coefficients.Comment: 5 pages, 4 Figures; Phys. Rev. B (in press

THE POST-FORDIST TRANSFORMATION: INFORMATION TECHNOLOGY AND ORGANIZATIONAL CHANGE

A new family of organizational forms, collectively labeled post-For(list, is steadily emerging in response to a perceived decline in the dominance of mass production and a rapidly changing competitive environment (Boynton and Victor 1991, 1992). These new forms have been variously labeled flexible specialization, mass customization, Toyotism, dynamic stability, and learn manufacturing. Understanding the rise of post-Fordism and the fundamental changes it necessitates, particularly in the use of information technology, is essential to cuirent IT theory and research (Allen and Boynton 1991; Pine 1992). This research combines qualitative field research with analysis of survey-based longitudinal data to better understand the role of IT in the post-Fordist transformation. This paper will discuss this research in process. Understanding the post-Fordist revolution requires first recognizing the challenge to the mass-production model. Fordist mass production was based on sustaining productivity growth by means of economies of scale and an increasingly elaborate division of labor (Piore and Sabel 1984). This foundation is now challenged by both market change and technological innovation. The large undifferentiated markets of the past centuty are increasingly saturated and fragmenting (Pine 1992). In addition, technological innovations are fueling the search for more flexible production processes. The market and technological changes are, in turn creating new strategic principles requiring simultaneously efficiency and flexibility (Boynton and Victor 1991, 1992). Fordist mass production can neither capitalize on the new strategic options nor compete with forms that do so (Womack, Jones and Roos 1990). Information technology is central to the recent rise of flexible technology, including modular and rapid-development software tools, numerically controlled machine tools, robots, flexible information and database storage and retrieval systems, EDI, and computer automated manufacturing (Pine 1992). Information technology is also a central factor in the emergence of the post-Fordist forms themselves, enabling globally networked organizations, powerful and flexible financial control systems, increasingly decentralized production and service delivery, and new kinds of organizational learning (Nonaka 1983; Boynton and Victor 1992). We are employing two research approaches to study the role of information technology in the emergence of post-Fordist forms: first, a qualitative approach based on intense field-based research and, second, analysis of longitudinal data based on survey research. We are currently conducting field based research with a number of firms, including Citibank, Coming Inc., Asea Brown Bovari, Bally Engineering, Westpac, and Lutron Electronics. To date, our investigations indicate several key requirements in the transformation to post-Fordist form: (1) the decoupling of IT asset investments from short-term product needs in order to build general-purpose process capabilities to match changes in service requirements; (2) the combining of firm-wide knowledge into a general purpose IT architecture in order to increase the speed product introduction rates; and (3) the influence of market as a precursor of post-Fordist pressures for increased product flexibility. We are also using a large scale survey methodology to explore the extent of the post-Fordist transition across industries and the level of IT investment employed to support this transition. Our large-scale survey data comes from the Profit Impact of Marketing Strategy (PIMS) project. Fifteen consecutive years of data have been organized. The analysis will utilize MANCOVA on a year-by-year basis to assess the existence and relative performance of combination (post-Fordist) strategies compared to firms pursuing low-cost or differentiation (FordisO strategies. Early findings indicate that trends toward combination low-cost, differentiated strategies are increasing by industry. The extent of IT investment that coincides with transformation to post-Fordist strategy is part of the next phase of data analysis within the PLMS database

Laboratory Tests of Gravitational Physics Using a Cryogenic Torsion Pendulum

Progress and plans are reported for a program of gravitational physics experiments using cryogenic torsion pendula undergoing large amplitude torsional oscillation. The program includes a UC Irvine project to measure the gravitational constant G and joint UC Irvine - U. Washington projects to test the gravitational inverse square law at a range of about 10 cm and to test the weak equivalence principle.Comment: 17 pages, 11 figures, contribution to the 10th Marcel Grossman Conference Proceedings (Rio de Janeiro, July 20 - 26, 2003) - changed wording in first paragraph of section