Medical requirements in support of long duration manned space flight

Medical support program for crew health and performance requirements in manned space flights of long duratio

Biological generalizations and the search for extraterrestrial life

Biological exploration for extraterrestrial lif

Transplantation of the small intestine: the pathologist's perspective.

Small-bowel transplantation is now ready for clinical trials. The surgical techniques and methods for immunosuppression and monitoring bowel status have been developed in animal models over the past 30 years. Several attempts at small-bowel transplantation in humans have already been reported. In the course of future trials, pathologists will be involved in the monitoring of the posttransplant course by mucosal biopsies and functional studies, including maltose and xylose absorption tests. The morphology of rejection has been studied in canine and rat models. Activated lymphocytes and plasma cells infiltrate the lamina propria and invade crypt epithelium, causing "cryptitis." Villous blunting ensues, resulting eventually in necrosis. Graft survival without immunosuppression is about 10 days. Under Cyclosporine immunosuppression, a lymphoplasmacytic infiltrate has been noted around nerves and vessels in the submucosa. The overlying mucosa may be relatively normal. End-stage bowel is characterized by a contracted, scarred mass. Due to the large amount of lymphoid tissue in the allograft, graft-versus-host disease is a significant problem in small-bowel transplantation

Learning the Roots of Visual Domain Shift

In this paper we focus on the spatial nature of visual domain shift, attempting to learn where domain adaptation originates in each given image of the source and target set. We borrow concepts and techniques from the CNN visualization literature, and learn domainnes maps able to localize the degree of domain specificity in images. We derive from these maps features related to different domainnes levels, and we show that by considering them as a preprocessing step for a domain adaptation algorithm, the final classification performance is strongly improved. Combined with the whole image representation, these features provide state of the art results on the Office dataset.Comment: Extended Abstrac

Gravity gradient attitude control system Patent

Gravity gradient attitude control system with gravity gradiometer and reaction wheels for artificial satellite attitude contro

Coherent Excitation of the 6S1/2 to 5D3/2 Electric Quadrupole Transition in 138Ba+

The electric dipole-forbidden, quadrupole 6S1/2 5D3/2 transition in Ba+ near 2051 nm, with a natural linewidth of 13 mHz, is attractive for potential observation of parity non-conservation, and also as a clock transition for a barium ion optical frequency standard. This transition also offers a direct means of populating the metastable 5D3/2 state to measure the nuclear magnetic octupole moment in the odd barium isotopes. Light from a diode-pumped, solid state Tm,Ho:YLF laser operating at 2051 nm is used to coherently drive this transition between resolved Zeeman levels in a single trapped 138Ba+ ion. The frequency of the laser is stabilized to a high finesse Fabry Perot cavity at 1025 nm after being frequency doubled. Rabi oscillations on this transition indicate a laser-ion coherence time of 3 ms, most likely limited by ambient magnetic field fluctuations.Comment: 5 pages, 5 figure

Process Information Systems: A Synthesis of Two Independent Approaches

The development of process information systems to support analysis of energy (or mineral) resource development strategies has been a continuing concern within IIASA's WELMM (Water, Energy Land, Materials and Manpower) Project since 1977, The resulting process information system, the Facility Data Base, has demonstrated its viability in a number of application studies, both in-house and outside IIASA. Motivated by its experience in socio-economic resource modeling, the Structural Analysis Division at Statistics Canada has initiated a feasibility study on a data base of industrial process descriptions (completed in 1981): the Process Encyclopedia. The independent development and the joint interest in process information systems has led to collaboration between the Structural Analysis Division of Statistics Canada and the Energy and Resources Task of the Resources and Environment Area of IIASA. This paper (also published by Statistics Canada: Working Paper No. 81-12-01) documents the first results of this collaboration: a synthesis of the conclusions which led to the development of the two systems; of their main features and of the lessons learned from their design and implementation. The conceptual mapping developed between the Facility Data Base and the Process Encyclopedia and documented as an Appendix of this paper provides a basis for future exchange of information between the two systems and should be seen as a first step in promoting interdisciplinary and international process information exchange and system building