William Harter - Academia.edu (original) (raw)

Papers by William Harter

Int J Cancer, 2000

In order to define technical limitations of conventional external beam irradiation for clinically... more In order to define technical limitations of conventional external beam irradiation for clinically localized prostate cancer, we evaluated the impact of several reducedfield treatment factors, such as reduced-field (RF) irradiated volume, RF technique, photon energy of treatment, and dose on survival endpoints and local control in a retrospective series. Several survival endpoints, such as disease-specific survival, freedom from relapse survival, biochemical no-evidence of disease (bNED) survival, and local control were associated with several treatment variables using univariate and multivariate analyses in 329 patients. Reduced-field technique appeared to predict survival outcome, with patients treated by bilateral 120°arcs faring less well than those treated by full 360°rotational fields. The irradiated volume of the reduced-field was also significantly associated with survival outcome, with patients treated with smaller volumes faring less well. Local failure rates also appeared increased, although not statistically, in patients treated with smaller RF sizes. In an attempt to explain these detected deficiencies, dose-volume histograms for prostate coverage were created for a small sample of patients. The deficiencies related to small reduced-field volume appeared to be largely attributable to poor dosimetric coverage of the prostate. These results underscore the limitations of conventional external beam treatment for prostate carcinoma when conventional techniques are employed, particularly if small reduced fields are used, and further supports the development of improved treatment techniques, such as conformal irradiation, as alternatives. Int. J. Cancer (Radiat. Oncol. Invest.) 90:265-274, 2000.

Optics Letters, 1979

Some implications of tumbling quartets, triplets, and doublets seen in high-resolution spherical-... more Some implications of tumbling quartets, triplets, and doublets seen in high-resolution spherical-top spectra are discussed. Some of the first observed cluster splittings are shown in SiF 4 spectra and compared with the predictions of the quantum theory of clusters. Further potentially interesting spectroscopic experiments are proposed.

Applied Physics Communications, 1987

The analog to the Legendre addition theorem is found for half-integral angular momentum using fra... more The analog to the Legendre addition theorem is found for half-integral angular momentum using frame transformations for rotor states.

Lecture Notes in Physics, Dec 31, 1975

The Energy Citations Database (ECD) provides access to historical and current research (1948 to t... more The Energy Citations Database (ECD) provides access to historical and current research (1948 to the present) from the Department of Energy (DOE) and predecessor agencies.

Chem Phys, 1978

The theory of level clusters, originally developed for ground state (A1) and weakly coupled infra... more The theory of level clusters, originally developed for ground state (A1) and weakly coupled infrared active (F2, nu3) excited states, is extended to include the Raman-active (E) states of vibration-rotation. Simple approximate formulas are given for the eigenvalue spectrum of the dominant second order vibration-rotation Hamiltonian and the results are compared with exact computer reductions.

Phys Today, 1994

Representations and Characters of Groups Now in its second edition, this text provides a modern i... more Representations and Characters of Groups Now in its second edition, this text provides a modern introduction to the representation theory of finite groups. The authors have revised the popular first edition and added a considerable amount of new material. The theory is developed in ...

Int J Cancer, 2000

In order to define technical limitations of conventional external beam irradiation for clinically... more In order to define technical limitations of conventional external beam irradiation for clinically localized prostate cancer, we evaluated the impact of several reducedfield treatment factors, such as reduced-field (RF) irradiated volume, RF technique, photon energy of treatment, and dose on survival endpoints and local control in a retrospective series. Several survival endpoints, such as disease-specific survival, freedom from relapse survival, biochemical no-evidence of disease (bNED) survival, and local control were associated with several treatment variables using univariate and multivariate analyses in 329 patients. Reduced-field technique appeared to predict survival outcome, with patients treated by bilateral 120°arcs faring less well than those treated by full 360°rotational fields. The irradiated volume of the reduced-field was also significantly associated with survival outcome, with patients treated with smaller volumes faring less well. Local failure rates also appeared increased, although not statistically, in patients treated with smaller RF sizes. In an attempt to explain these detected deficiencies, dose-volume histograms for prostate coverage were created for a small sample of patients. The deficiencies related to small reduced-field volume appeared to be largely attributable to poor dosimetric coverage of the prostate. These results underscore the limitations of conventional external beam treatment for prostate carcinoma when conventional techniques are employed, particularly if small reduced fields are used, and further supports the development of improved treatment techniques, such as conformal irradiation, as alternatives. Int. J. Cancer (Radiat. Oncol. Invest.) 90:265-274, 2000.

Optics Letters, 1979

Some implications of tumbling quartets, triplets, and doublets seen in high-resolution spherical-... more Some implications of tumbling quartets, triplets, and doublets seen in high-resolution spherical-top spectra are discussed. Some of the first observed cluster splittings are shown in SiF 4 spectra and compared with the predictions of the quantum theory of clusters. Further potentially interesting spectroscopic experiments are proposed.

Applied Physics Communications, 1987

The analog to the Legendre addition theorem is found for half-integral angular momentum using fra... more The analog to the Legendre addition theorem is found for half-integral angular momentum using frame transformations for rotor states.

Lecture Notes in Physics, Dec 31, 1975

The Energy Citations Database (ECD) provides access to historical and current research (1948 to t... more The Energy Citations Database (ECD) provides access to historical and current research (1948 to the present) from the Department of Energy (DOE) and predecessor agencies.

Chem Phys, 1978

The theory of level clusters, originally developed for ground state (A1) and weakly coupled infra... more The theory of level clusters, originally developed for ground state (A1) and weakly coupled infrared active (F2, nu3) excited states, is extended to include the Raman-active (E) states of vibration-rotation. Simple approximate formulas are given for the eigenvalue spectrum of the dominant second order vibration-rotation Hamiltonian and the results are compared with exact computer reductions.

Phys Today, 1994

Representations and Characters of Groups Now in its second edition, this text provides a modern i... more Representations and Characters of Groups Now in its second edition, this text provides a modern introduction to the representation theory of finite groups. The authors have revised the popular first edition and added a considerable amount of new material. The theory is developed in ...