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3,901 results on '"Friedman, H."'

1. Quantum Renewal Equation for the first detection time of a quantum walk

Author

Friedman, H., Kessler, D. A., and Barkai, E.

Subjects
Condensed Matter - Statistical Mechanics, Quantum Physics
Abstract

We investigate the statistics of the first detected passage time of a quantum walk. The postulates of quantum theory, in particular the collapse of the wave function upon measurement, reveal an intimate connection between the wave function of a process free of measurements, i.e. the solution of the Schr\"odinger equation, and the statistics of first detection events on a site. For stroboscopic measurements a quantum renewal equation yields basic properties of quantum walks. For example, for a tight binding model on a ring we discover critical sampling times, diverging quantities such as the mean time for first detection, and an optimal detection rate. For a quantum walk on an infinite line the probability of first detection decays like $(\mbox{time})^{-3}$ with a superimposed oscillation, critical behavior for a specific choice of sampling time, and vanishing amplitude when the sampling time approaches zero due to the quantum Zeno effect.

Published
2016
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3. Expansions of the real field by open sets: definability versus interpretability

Author

Friedman, H., Kurdyka, K., Miller, C., and Speissegger, P.

Subjects
Mathematics - Logic, 03C64, 03E15, 28E15.
Abstract

An open set U of the real numbers R is produced such that the expansion (R,+,x,U) of the real field by U defines a Borel isomorph of (R,+,x,N) but does not define N. It follows that (R,+,x,U) defines sets in every level of the projective hierarchy but does not define all projective sets. This result is elaborated in various ways that involve geometric measure theory and working over o-minimal expansions of (R,+,x). In particular, there is a Cantor subset K of R such that for every exponentially bounded o-minimal expansion M of (R,+,x), every subset of R definable in (M,K) either has interior or is Hausdorff null., Comment: 14 pages

Published
2008

7. A phase II study of temozolomide vs. procarbazine in patients with glioblastoma multiforme at first relapse

Author

Yung, WKA, Albright, RE, Olson, J, Fredericks, R, Fink, K, Prados, MD, Brada, M, Spence, A, Hohl, RJ, Shapiro, W, Glantz, M, Greenberg, H, Selker, RG, Vick, NA, Rampling, R, Friedman, H, Phillips, P, Bruner, J, Yue, N, Osoba, D, Zaknoen, S, and Levin, VA

Subjects
Biomedical and Clinical Sciences, Oncology and Carcinogenesis, Clinical Trials and Supportive Activities, Neurosciences, Rare Diseases, Brain Cancer, Clinical Research, Brain Disorders, Cancer, 6.1 Pharmaceuticals, Evaluation of treatments and therapeutic interventions, Adult, Aged, Antineoplastic Agents, Antineoplastic Agents, Alkylating, Brain Neoplasms, Dacarbazine, Disease-Free Survival, Female, Glioblastoma, Gliosarcoma, Humans, Male, Middle Aged, Procarbazine, Prognosis, Quality of Life, Recurrence, Temozolomide, Time Factors, malignant glioma, temozolomide, procarbazine, glioblastoma multiforme, Public Health and Health Services, Oncology & Carcinogenesis, Oncology and carcinogenesis
Abstract

A randomized, multicentre, open-label, phase II study compared temozolomide (TMZ), an oral second-generation alkylating agent, and procarbazine (PCB) in 225 patients with glioblastoma multiforme at first relapse. Primary objectives were to determine progression-free survival (PFS) at 6 months and safety for TMZ and PCB in adult patients who failed conventional treatment. Secondary objectives were to assess overall survival and health-related quality of life (HRQL). TMZ was given orally at 200 mg/m(2)/day or 150 mg/m(2)/day (prior chemotherapy) for 5 days, repeated every 28 days. PCB was given orally at 150 mg/m(2)/day or 125 mg/m(2)/day (prior chemotherapy) for 28 days, repeated every 56 days. HRQL was assessed using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30 [+3]) and the Brain Cancer Module 20 (BCM20). The 6-month PFS rate for patients who received TMZ was 21%, which met the protocol objective. The 6-month PFS rate for those who received PCB was 8% (P = 0.008, for the comparison). Overall PFS significantly improved with TMZ, with a median PFS of 12.4 weeks in the TMZ group and 8.32 weeks in the PCB group (P = 0.0063). The 6-month overall survival rate for TMZ patients was 60% vs. 44% for PCB patients (P = 0.019). Freedom from disease progression was associated with maintenance of HRQL, regardless of treatment received. TMZ had an acceptable safety profile; most adverse events were mild or moderate in severity.

Published
2000

21. 11TH AMS EDUCATION SYMPOSIUM

Author

Pandya, R. E., Smith, D. R., Ramamurthy, M. K., Croft, P. J., Hayes, M. J., Murphy, K. A., McDonnell, J. D., Johnson, R. M., and Friedman, H. A.

Published
2004

22. The Role of Herpes Simplex Virus Glycoproteins in Immune Evasion

Author

Dubin, G., Fishman, N. O., Eisenberg, R. J., Cohen, G. H., Friedman, H. M., Compans, R. W., editor, Cooper, M., editor, Koprowski, H., editor, McConnell, I., editor, Melchers, F., editor, Nussenzweig, V., editor, Oldstone, M., editor, Olsnes, S., editor, Potter, M., editor, Saedler, H., editor, Vogt, P. K., editor, Wagner, H., editor, Wilson, I., editor, and Rouse, Barry T., editor

Published
1992
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26. 10th AMS Symposium on Education

Author

Smith, D. R., Hayes, M. C., Ramamurthy, M. K., Zeitler, J. W., Murphy, K. A., Croft, P. J., Nese, J. M., Friedman, H. A., Robinson, H. W., Thormeyer, C. D., Ruscher, P. A., and Pandya, R. E.

Published
2001

27. Ninth AMS Symposium on Education

Author

Phoebus, P. A., Smith, D. R., Croft, P. J., Friedman, H. A., Hayes, M. C., Murphy, K. A., Ramamurthy, M. K., Watkins, B., and Zeitler, J. W.

Published
2001

34. Cosmic X-ray Sources

Author

Bowyer, S., Byram, E. T., Chubb, T. A., and Friedman, H.

Published
1965

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