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210 results on '"Fulkerson D"'

1. Emergency Department Cesarean Section for Placental Abruption; Anticipation from Prehospital History with Preparation for Immediate Delivery

Author

Thompson M, Mark Walsh, Wiarda G, Nuha Zackariya, Sundararajan R, Thomas S, Fulkerson D, Czarnecki D, Al-Fadhl H, Faisal Shariff, Marsee M, Speybroeck J, Clark A, Shariff Fs, and Wadsworth S

Subjects
Anesthesiology and Pain Medicine, Placental abruption, business.industry, Anticipation (artificial intelligence), Section (typography), medicine, Medical emergency, Emergency department, medicine.disease, business, reproductive and urinary physiology
Abstract

Emergency department cesarean section for placental abruption is an uncommon surgical procedure that requires anticipation in the prehospital environment as well as preemptive recognition of impending fetal demise by the emergency physician. The presence of an obstetrician ready to perform immediate cesarean section on an unstable patient with placental abruption may be lifesaving for both the mother and the fetus. However, there are no specific guidelines for prehospital recognition of patients with placental abruption that require emergency cesarean section. While the emergency department is not the optimum surgical theatre for an emergency cesarean section, placental abruption often deteriorates so quickly that even a few minutes of delay can have catastrophic consequences for both mother and fetus. We describe a case of placental abruption following moderate motor vehicular trauma in an eight month pregnant woman whose only complaint was moderate abdominal pain. The emergency physician’s suspicion based on the mechanism of injury caused her to mobilize the obstetrician, who was ready to perform an emergency department cesarean section with successful delivery of the fetus. Subsequent managing of the mother’s surgical incision and coagulopathy was performed in the operating room. This case highlights the importance of vigilance that prehospital providers, emergency department physicians, and obstetricians should have for a pregnant patient involved in a motor vehicle crash.

Published
2020

15. Linear Inequalities and Related Systems. (AM-38)

Author

DANTZIG, G. B., DUFFIN, R. J., FAN, K., FORD, L. R., FULKERSON, D. R., GALE, D., GOLDMAN, A. J., HELLER, I., KRUSKAL, J. B., KUHN, H. W., MILLS, H. D., THOMPSON, G. L., TOMPKINS, C. B., TUCKER, A. W., WOLFE, P., Kuhn, H. W., Tucker, A. W., DANTZIG, G. B., DUFFIN, R. J., FAN, K., FORD, L. R., FULKERSON, D. R., GALE, D., GOLDMAN, A. J., HELLER, I., KRUSKAL, J. B., KUHN, H. W., MILLS, H. D., THOMPSON, G. L., TOMPKINS, C. B., TUCKER, A. W., WOLFE, P., Kuhn, H. W., and Tucker, A. W.

Published
2016
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21. Two computationally difficult set covering problems that arise in computing the 1-width of incidence matrices of Steiner triple systems

Author

Fulkerson, D. R., Nemhauser, G. L., Trotter, L. E., Balinski, M. L., editor, Beale, E. M. L., editor, Dantzig, George B., editor, Kantorovich, L., editor, Koopmans, Tjalling C., editor, Tucker, A. W., editor, Wolfe, Philip, editor, Zoutendijk, G., editor, Bod, Peter, editor, Chvátal, Václav, editor, Cobb, Richard M., editor, Cottle, Richard W., editor, Dennis, J. E., Jr., editor, Eaves, B. Curtis, editor, Fletcher, R., editor, Fulkerson, D. R., editor, Geoffrion, Arthur M., editor, Hansen, Terje, editor, Hellerman, Eli, editor, Huard, Pierre, editor, Johnson, Ellis L., editor, Karp, Richard M., editor, Lemke, C. E., editor, McCormick, Garth P., editor, Nemhauser, George L., editor, Oettli, Werner, editor, Shapley, L. S., editor, Spielberg, K., editor, Walkup, D. W., editor, Williams, A. C., editor, and Witzgall, C., editor

Published
1974
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22. On balanced matrices

Author

Fulkerson, D. R., Hoffman, A. J., Oppenheim, Rosa, Balinski, M. L., editor, Beale, E. M. L., editor, Dantzig, George B., editor, Kantorovich, L., editor, Koopmans, Tjalling C., editor, Tucker, A. W., editor, Wolfe, Philip, editor, Zoutendijk, G., editor, Bod, Peter, editor, Chvátal, Václav, editor, Cobb, Richard M., editor, Cottle, Richard W., editor, Dennis, J. E., Jr., editor, Eaves, B. Curtis, editor, Fletcher, R., editor, Fulkerson, D. R., editor, Geoffrion, Arthur M., editor, Hansen, Terje, editor, Hellerman, Eli, editor, Huard, Pierre, editor, Johnson, Ellis L., editor, Karp, Richard M., editor, Lemke, C. E., editor, McCormick, Garth P., editor, Nemhauser, George L., editor, Oettli, Werner, editor, Shapley, L. S., editor, Spielberg, K., editor, Walkup, D. W., editor, Williams, A. C., editor, and Witzgall, C., editor

Published
1974
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35. F100(3) parallel compressor computer code and user's manual

Author

Mazzawy, R. S, Fulkerson, D. A, Haddad, D. E, and Clark, T. A

Subjects
Aircraft Propulsion And Power
Abstract

The Pratt & Whitney Aircraft multiple segment parallel compressor model has been modified to include the influence of variable compressor vane geometry on the sensitivity to circumferential flow distortion. Further, performance characteristics of the F100 (3) compression system have been incorporated into the model on a blade row basis. In this modified form, the distortion's circumferential location is referenced relative to the variable vane controlling sensors of the F100 (3) engine so that the proper solution can be obtained regardless of distortion orientation. This feature is particularly important for the analysis of inlet temperature distortion. Compatibility with fixed geometry compressor applications has been maintained in the model.

Published
1978

36. E1279

Author

Ford,, L. R., Fulkerson, D. R., and Marsh, D. C. B.

Published
1958
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46. Letters to the Editor.

Author

Fulkerson, D. R., Gale, D., Votaw Jr., D. F., Harvey, Ronald W., Wagner, Harvey M., Minty, George J., and Rutledge, R. W.

Subjects
LETTERS to the editor, OPERATIONS research, MANUFACTURING processes, INDUSTRIAL engineering, SYSTEMS theory, METHODOLOGY, RESEARCH
Abstract

Presents letters to the editor about various articles related to operations research published in previous issues of the periodical. Opinion of a reader on the article "Solution of the Quota Problem by a Successive-Reduction Method," by D.F. Votaw; Description of a sample survey of industrial operations research activities; Feedback of a reader on the article "A Discussion of Random Methods for Seeking Maxima," by Samuel H Brooks.

Published
1958
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49. Flow Field Coupling Between Compression System Components in Asymmetric Flow

Author

Greitzer, E. M., Mazzawy, R. S., and Fulkerson, D. A.

Abstract

The coupling between an axial compressor in an inlet distortion and downstream compression system components is studied analytically and experimentally. The analysis is based on a nonlinear multisegment parallel compressor model coupled to a calculation procedure for the asymmetric flowfield downstream of the compressor. It is shown that in the presence of circumferentially nonuniform flow (distortion) there can be a strong interaction between the compressor and its overall environment. The response of the compressor to an inlet total pressure distortion can therefore depend not only on the compressor, as has sometimes been assumed, but also on the other components in the compression system. Further, the alteration in the response as a result of the interaction can be either beneficial or detrimental, depending on the nature of the component. Experiments investigating this coupling have been carried out on a three stage compressor. The experiments, which involved operating the compressor with three quite different downstream components, show clearly the differences that can exist in compressor response to distortion due to the compressor-component coupling. The analytical predictions of these effects are found to be in good agreement with the experimental results.

Published
1978
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50. Mini-Remotely Piloted Vehicle Precision Tracking Evaluation

Author

Fulkerson, D. C., Hershberger, M. L., and Scanlan, L. A.

Abstract

The research reported assessed the ability of a human operator to manually null the residual pointing errors that remain on the output of an automatic target tracker under conditions of data link bandwidth reduction. Three operator performance evaluations were conducted using a hybrid computer simulation of the mini-RPV system. The first study assessed the ability of an operator to null the residual errors using a baseline system design. In the study, 32 combinations of environmental and display factors were examined to determine their impact on pointing accuracy. In no case did the average performance reach the 50 microradian standard deviation criterion. The remaining two studies evaluated candidate modifications to the mini-RPV system which would be expected to improve overall tracking performance. Based on these studies, a modified system was identified which allowed criterion tracking accuracy while yielding a 32-to-1 reduction in the data link bandwidth.

Published
1980
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