Does Cooking Technology Matter? Fuelwood Use and Efficiency of Different Cooking Technologies in Lilongwe District, Malawi

Biomass, mainly firewood and charcoal contributes over 90% of Malawi’s total energy demand. As a result, deforestation is increasing at unprecedented rate and firewood is becoming scarce. Individual assessment of various cooking technologies has been widely done without comparison of various cooking technologies. Therefore, this study has been devoted to compare the performance, cooking time and fuelwood usage of the three-stone fireplace, Rocket and Chitetezo cooking technologies. The study used Specific Fuel consumption (SC) as a proxy for principal indicator of cooking technology efficiency. It measures the amount of wood used per kg of food. Rocket stove has been found to use less time, less fuelwood and produces less smoke.Cooking Technology, Fuelwood, Stove Efficiency

The Banks of the Cohomology River

We give sharp bounds on the vanishing of the cohomology of a tensor product of vector bundles on the n-dimensional projective space in terms of the vanishing of the cohomology of the factors. For this purpose we introduce regularity indices generalizing the Castelnuovo-Mumford regularity. As an application we give a sufficient condition for a vector bundle to have an unobstructed deformation theory that depends only on the cohomology table of the bundle. We construct complete families of bundles with such cohomology tables.Comment: 16 page

Effects of high energy radiation on the mechanical properties of epoxy/graphite fiber reinforced composites

Publications and theses generated on composite research are listed. Surface energy changes of an epoxy based on tetraglycidyl diaminodiphenyl methane (TGDDM)/diaminodiphenyl sulfone (DDS), T-300 graphite fiber and T-300/5208 (graphite fiber/epoxy) composites were investigated after irradiation with 0.5 MeV electrons. Electron spin resonance (ESR) investigations of line shapes and the radical decay behavior were made of an epoxy based on tetraglycidyl diaminodiphenyl methane (TGDDM)/diaminodiphenyl sulfone (DDS), T-300 graphite fiber, and T-300/5208 (graphite fiber/epoxy) composites after irradiation with Co(60) gamma-radiation or 0.5 MeV electrons. The results of the experiments are discussed

Central limit theorems for additive functionals of ergodic Markov diffusions processes

We revisit functional central limit theorems for additive functionals of ergodic Markov diffusion processes. Translated in the language of partial differential equations of evolution, they appear as diffusion limits in the asymptotic analysis of Fokker-Planck type equations. We focus on the square integrable framework, and we provide tractable conditions on the infinitesimal generator, including degenerate or anomalously slow diffusions. We take advantage on recent developments in the study of the trend to the equilibrium of ergodic diffusions. We discuss examples and formulate open problems

Effects of high energy radiation on the mechanical properties of epoxy graphite fiber reinforced composites

The effects of high energy radiation on mechanical properties and on the molecular and structural properties of graphite fiber reinforced composites are assessed so that durability in space applications can be predicted. A listing of composite systems irradiated along with the maximum radiation dose applied and type of mechanical tests performed is shown. These samples were exposed to 1/2 MeV electrons

Effects of high energy radiation on the mechanical properties of epoxy/graphite fiber composites

Studies on the effects of high energy radiation on graphite fiber reinforced composites are summarized. Studies of T300/5208 and C6000/PMR15 composites, T300 fibers and the resin system MY720/DDS (tetraglycidyl-4,4'-diaminodiphenyl methane cured with diaminodiphenyl sulfone) are included. Radiation dose levels up to 8000 Mrads were obtained with no deleterious effects on the breaking stress or modulus. The effects on the structure and morphology were investigated using mechanical tests, electron spin resonance, X-ray diffraction, and electron spectroscopy for chemical analysis (ESCA or X-ray photoelectron spectroscopy). Details of the experiments and results are given. Studies of the fracture surfaces of irradiated samples were studied with scanning electron microscopy; current results indicate no differences in the morphology of irradiated and control samples

Lawrence K. Williams

[Excerpt] In 1952, Professor Williams graduated cum laude from Tufts University. He received his Masters Degree in 1954 from the University Illinois. In 1960, he earned a PhD in psychology from the University of Michigan. Professor Williams served in the U.S. Army from 1954-56, and worked as a research psychologist. In 1961 he came to Cornell University as an assistant professor, and became a full professor in 1969. When he retired in 1999, his colleagues awarded him an emeritus professorship. During his long career, Professor Williams served for a period as chairman of the Department of Organizational Behavior and for 25 years was the director of graduate studies for the school of Industrial and Labor Relations. He served on the committees of over 250 graduate students and was chairman for more than 70 students. He was also one of the founders and directors of GOALS, a foundation to support under represented minority graduate students in Human Resources and Industrial Relations. Professor Williams was also a Fulbright scholar in Peru during 1967-72

Status of Supersymmetric Grand Unified Theories

We begin with a brief discussion of the building blocks of supersymmetric grand unified theories. We recall some of the compelling theoretical reasons for viewing supersymmetric grand unification as an attractive avenue for physics beyond the standard model. This is followed by a discussion of some of the circumstantial evidence for these ideas.Comment: 12 pages plain LaTeX to be run twice. Invited talk at the XII DAE Symposium on High Energy Physics, Guwahati, India, Dec. 26, 1996 - Jan. 1, 199

Sandy Jordan

[Excerpt] After 28 years, Sandy Jordan is saying goodbye to her career at ILR on August 31, 2006. Sandy started out in ILR in 1978 as an administrative assistant working on a small grant administered by Prof. Robert Doherty and Prof. Ronald Donovan. She had been laid off from the local telephone company and was desperately searching for another job when Mary Tucker off ered her the position mainly because Sandy “happened to be the only applicant that did not remind Mary of her mother.” During the summer of 1978, she applied for and was offered a position in the ILR Extension Division Fiscal Office working for David Stotz and Merle Hayes. She worked in the Extension Fiscal Office until June 1991 when she transferred to the ILR Human Resources Office working with Pam Strausser and Gail Hendrix and has remained in the HR office ever since. After retiring, Sandy plans to ride off into the sunset on a big orange motorcycle