The load shedding advisor: An example of a crisis-response expert system

A Prolog-based prototype expert system is described that was implemented by the Network Operations Branch of the NASA Goddard Space Flight Center. The purpose of the prototype was to test whether a small, inexpensive computer system could be used to host a load shedding advisor, a system which would monitor major physical environment parameters in a computer facility, then recommend appropriate operator reponses whenever a serious condition was detected. The resulting prototype performed significantly to efficiency gains achieved by replacing a purely rule-based design methodology with a hybrid approach that combined procedural, entity-relationship, and rule-based methods

The contemporary landscape of fuel poverty research

A key aim of this special issue has been to showcase the breadth of approaches to fuel poverty research emanating from a growing international community of fuel poverty researchers and in doing so, to promote awareness of the range of disciplinary areas influencing contemporary fuel poverty research. Overcoming established disciplinary and methodological siloes represents a considerable challenge for the future of the field and may be key to offering those in policy and practice the clarity and comprehensive insights that they need to fully understand and respond effectively to the problem

The role of the mentor in professional knowledge development across four professions

Purpose - Against a British policy backdrop, which places an ever-increasing emphasis on workplace learning in pre-service professional programmes, this paper investigates the contribution of the mentor to professional knowledge development in nursing, paramedicine, social work and teaching. Approach - Taking the form of a literature review, it explores the influence of policy, professional and theoretical conceptualisations of the mentor role and structural factors influencing the mentor’s contribution to professional knowledge. Findings - Where there are clearly delineated policy obligations for the mentor to ‘teach’ mentees, mentors are more likely to make connections between theoretical and practical knowledge. When this responsibility is absent or informal, they are inclined to attend to the development of contextual knowledge with a consequent disconnect between theory and practice. In all four professions, mentors face significant challenges, especially with regard to the conflict between supporting and assessor roles and the need to attend to heavy contractual workloads, performance targets and mentoring roles in tandem. Practical implications - The authors argue first for the need for more attention to the pedagogy of mentoring and second, for structural changes to workload allocations, career progression and mentoring education. In order to develop more coherent and interconnected professional knowledge between different domains, and the reconciliation of different perspectives, it would be useful to underpin mentoring pedagogy with Bhabha’s notion of ‘third space’. Originality - The paper contributes to the field since it considers new obligations incumbent on mentors to assist mentees in reconciling theoretical and practical knowledge by consequence of policy and takes a multi-professional perspective

Rare Kaon Decays

The current status of rare kaon decay experiments is reviewed. New limits in the search for Lepton Flavor Violation are discussed, as are new measurements of the CKM matrix.Comment: 8 pages, 3 figures, LaTeX, presented at the 3rd International Conference on B Phyiscs and CP Violation, Taipei December 3-7, 199

Measuring the quantum efficiency of single radiating dipoles using a scanning mirror

Using scanning probe techniques, we show the controlled manipulation of the radiation from single dipoles. In one experiment we study the modification of the fluorescence lifetime of a single molecular dipole in front of a movable silver mirror. A second experiment demonstrates the changing plasmon spectrum of a gold nanoparticle in front of a dielectric mirror. Comparison of our data with theoretical models allows determination of the quantum efficiency of each radiating dipole.Comment: 4 pages, 4 figure

Are biogenic emissions a significant source of summertime atmospheric toluene in the rural Northeastern United States?

Summertime atmospheric toluene enhancements at Thompson Farm in the rural northeastern United States were unexpected and resulted in a toluene/benzene seasonal pattern that was distinctly different from that of other anthropogenic volatile organic compounds. Consequently, three hydrocarbon sources were investigated for potential contributions to the enhancements during 2004–2006. These included: (1) increased warm season fuel evaporation coupled with changes in reformulated gasoline (RFG) content to meet US EPA summertime volatility standards, (2) local industrial emissions and (3) local vegetative emissions. The contribution of fuel evaporation emission to summer toluene mixing ratios was estimated to range from 16 to 30 pptv d−1, and did not fully account for the observed enhancements (20–50 pptv) in 2004–2006. Static chamber measurements of alfalfa, a crop at Thompson Farm, and dynamic branch enclosure measurements of loblolly pine trees in North Carolina suggested vegetative emissions of 5 and 12 pptv d−1 for crops and coniferous trees, respectively. Toluene emission rates from alfalfa are potentially much larger as these plants were only sampled at the end of the growing season. Measured biogenic fluxes were on the same order of magnitude as the influence from gasoline evaporation and industrial sources (regional industrial emissions estimated at 7 pptv d−1 and indicated that local vegetative emissions make a significant contribution to summertime toluene enhancements. Additional studies are needed to characterize the variability and factors controlling toluene emissions from alfalfa and other vegetation types throughout the growing season

General Spectral Flow Formula for Fixed Maximal Domain

We consider a continuous curve of linear elliptic formally self-adjoint differential operators of first order with smooth coefficients over a compact Riemannian manifold with boundary together with a continuous curve of global elliptic boundary value problems. We express the spectral flow of the resulting continuous family of (unbounded) self-adjoint Fredholm operators in terms of the Maslov index of two related curves of Lagrangian spaces. One curve is given by the varying domains, the other by the Cauchy data spaces. We provide rigorous definitions of the underlying concepts of spectral theory and symplectic analysis and give a full (and surprisingly short) proof of our General Spectral Flow Formula for the case of fixed maximal domain. As a side result, we establish local stability of weak inner unique continuation property (UCP) and explain its role for parameter dependent spectral theory.Comment: 22 page

Tactile Gloves for Autonomous Grasping With the NASA/DARPA Robonaut

Tactile data from rugged gloves are providing the foundation for developing autonomous grasping skills for the NASA/DARPA Robonaut, a dexterous humanoid robot. These custom gloves compliment the human like dexterity available in the Robonaut hands. Multiple versions of the gloves are discussed, showing a progression in using advanced materials and construction techniques to enhance sensitivity and overall sensor coverage. The force data provided by the gloves can be used to improve dexterous, tool and power grasping primitives. Experiments with the latest gloves focus on the use of tools, specifically a power drill used to approximate an astronaut's torque tool

Reflective self-attention: A more stable predictor of connection to nature than mindful attention.

There is much to be gained from understanding the individual differences that predict our connection to nature, as those that are more connected tend to be more caring towards the environment and benefit from better well-being. Study 1 (n=137) found that reflective self-attention and mindful attention significantly predicted connection to nature, while anxious self-attention had a borderline significant negative association. With the introduction of personality measures, study 2 (n=161) found that reflective self-attention and openness had a stronger relationship to nature connection than mindful attention. Study 3 (n=99) found reflective self-attention, rather than mindful attention, to be associated with an increase in connection to nature. A pre-reflective and intentional self-attention account of nature connectedness is proposed with intentional self-reflection being a stronger factor than mindful attention

Is it still worth searching for lepton flavor violation in rare kaon decays?

Prospective searches for lepton flavor violation (LFV) in rare kaon decays at the existing and future intermediate-energy accelerators are considered. The proposed studies are complementary to LFV searches in muon-decay experiments and offer a unique opportunity to probe models with approximately conserved fermion-generation quantum number with sensitivity superior to that in other processes. Consequently, new searches for LFV in kaon decays are an important and independent part of the general program of searches for lepton flavor violation in the final states with charged leptons.Comment: 30 pages, 10 figures. An extended version of the talk given at the Chicago Flavor Seminar, February 27, 2004. In the new version some misprints were corrected and some new data for LFV-processes were added. The main content of the paper was not changed. The paper is published in Yad. Fiz. 68, 1272 (2005