Dennis Horn - Academia.edu (original) (raw)

Papers by Dennis Horn

Research paper thumbnail of Peak Power Assessment of Isokinetic Knee Flexor and Extensor Tests – Pitfalls of a Dynamometer-based Assessment

Measurement in Physical Education and Exercise Science

Research paper thumbnail of Results of Testing the AEDC 5-MW Segmented ARC Heater

When U. S. Government drawings specifications, or other data are used for any purpose other than ... more When U. S. Government drawings specifications, or other data are used for any purpose other than a definitely related Government procurement operation, the Government thereby incurs no responsibility nor any obligation whatsoever, and the fact that the Government may have formulated, furnished, or in any way supplied the said drawings, specifications, or other data, is not to be regarded by implication or otherwise, or in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto. Qualified users may obtain copies of this report from the Defense Documentation Center. References to named commercial products in this report are not to be considered in any sense as an endorsement of the product by the United States Air Force or the Government. This report has been reviewed by the Information Office (OI) and is releasable to the National Technical Information Service (NTIS). At NTIS, it will be available to the general public, including foreign nations. APPROVAL STATEMENT This technical report has been reviewed and is approved for publication.

Research paper thumbnail of A Film Cooling Experiment on a Convergent-Divergent Nozzle

When U. S. Government drawings specifications, or other data are used for any purpose other than ... more When U. S. Government drawings specifications, or other data are used for any purpose other than a definitely related Government procurement operation, the Government thereby incurs no responsibility nor any obligation whatsoever, and the fact that the Government may have formulated, furnished, or in any way supplied the said drawings, specifications, or other data, is not to be regarded by implication or otherwise, or in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto. Qualified users may obtain copies of this report from the Defense Documentation Center. References to named commercial products in this report are not to be considered in any sense as an endorsement of the product by the United States Air Korce ar the Government.

Research paper thumbnail of Ceiling board lifter

Research paper thumbnail of Army Science Board 1988 Summer Study Army Testing

Research paper thumbnail of Photograph recording and playback device

Research paper thumbnail of Easy access bow holder

Research paper thumbnail of Exterior ductwork system

Research paper thumbnail of Weaponry bracket assembly

Research paper thumbnail of Barge and walkway connection system

Research paper thumbnail of Some Considerations in the Design of Watercooled Nozzle Throat Sections for High Temperature, High Pressure Operation

Research paper thumbnail of AEDC High-Enthalpy Ablation Test (HEAT) Facility Description, Development, and Calibration

Research paper thumbnail of Avian Predators of Douglas-fir Tussock Moth, Orgyia pseudotsugata (McDunnough), (Lepidoptera: Lymantriidae) in Southwestern Oregon

Environmental Entomology, 1984

... TOROLF R. TORGERSEN, JACK WARD THOMAS, RICHARD R. MASON, AND DENNIS VAN HORN ... minimus West... more ... TOROLF R. TORGERSEN, JACK WARD THOMAS, RICHARD R. MASON, AND DENNIS VAN HORN ... minimus Western tanager, Piranga ludoviciana Pygmy nuthatch, Sitta pygmaea Chestnut-backed chickadee, Parus rufescens Chipping sparrow, Spizella passerina Ruby ...

Research paper thumbnail of Enthalpy probe for arc heater flow diagnostics

28th Thermophysics Conference, 1993

This paper describes accomplishments made in the research and development of a dual sonic nozzle ... more This paper describes accomplishments made in the research and development of a dual sonic nozzle enthalpy probe for arc heater flow diagnostics. The primary concern and focus for the study presented herein, was the fabrication of an internally cooled structure that can survive a steady-state dwell in a severe heating environment. This structure is the housing and thermal protection system

Research paper thumbnail of A stereoselective synthesis of 1,2-diols from α-hydroxyaldehydes

Tetrahedron Letters, 1985

Research paper thumbnail of Breaking with the Model: Creating Approaches to Interactive Distance Learning

International Professional Communication Conference, 1998

Newsgroups and list servers provide a means for extending Internet dialogues beyond the one-on-on... more Newsgroups and list servers provide a means for extending Internet dialogues beyond the one-on-one telephone model. While much of the discourse in these new media is chatter, a small percentage of valuable information is generated. Frequently asked question (FAQ) pages provide a means of distributing such information usefully, but require a considerable editing effort. New approaches use the interactivity of

Research paper thumbnail of Fall and Winter Raptors of Turnbull National Wildlife Refuge, 1972 to 1973

Research paper thumbnail of Network collaboration with UNIX

Technical Communication Quarterly, 1993

Recent advances in computer technology make networking an essential skill for the technical commu... more Recent advances in computer technology make networking an essential skill for the technical communicator. Particularly, the development of local, national, and international computer networks has created a collaborative writing environment. At the heart of the Internet network is the UNIX operating system. The open architecture of UNIX makes it a superior tool for collaborative writing, in the classroom, across the

Research paper thumbnail of Mechanical design of induction motors applied on adjustable speed drives

This paper provides an overview of key mechanical design aspects of induction motors applied to a... more This paper provides an overview of key mechanical design aspects of induction motors applied to adjustable speed drives to their optimize performance and ensure the reliability of the system. Rotating assembly stresses, shaft resonances, bearing limitations and lubrications are discussed and related to practical limitations. An application example and failure analysis from a Chevron production facility are presented to highlight design concerns and key areas of attention required to achieve reliable and cost-effective performance

Research paper thumbnail of The biosynthetic pathway of ecdysone: Studies with vitellogenic ovaries of Locusta migratoria (orthoptera)

Molecular and Cellular Endocrinology, 1982

Ovaries of adult females of Locusta migratoria synthesize impressive amounts of the steroid hormo... more Ovaries of adult females of Locusta migratoria synthesize impressive amounts of the steroid hormone ecdysone (and related ecdysteroids) during the late phases of vitellogenesis. The present study, aimed at elucidating the sequence of the biosynthetic steps that lead from cholesterol to ecdysone, has taken benefit of this remarkable biological model by using a double approach: (1) isolation and physicochemical identification of endogenous biogenetic intermediates; (2) metabolic study of labelled putative precursor molecules. The data presented in this paper lead us to propose the following sequence of events: conversion of cholesterol to 3p-hydroxy-5pcholest-7end-one (via several intermediates not identified in this study) followed by 14p-hydroxylation to 3p,l4cr-dihydroxy-5pholest-7-en&one; hydroxylation on the side-chain at C-25 and C-22 (in this order) to 2-deoxyecdysone; hydroxylation at C-2 to ecdysone.

Research paper thumbnail of Peak Power Assessment of Isokinetic Knee Flexor and Extensor Tests – Pitfalls of a Dynamometer-based Assessment

Measurement in Physical Education and Exercise Science

Research paper thumbnail of Results of Testing the AEDC 5-MW Segmented ARC Heater

When U. S. Government drawings specifications, or other data are used for any purpose other than ... more When U. S. Government drawings specifications, or other data are used for any purpose other than a definitely related Government procurement operation, the Government thereby incurs no responsibility nor any obligation whatsoever, and the fact that the Government may have formulated, furnished, or in any way supplied the said drawings, specifications, or other data, is not to be regarded by implication or otherwise, or in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto. Qualified users may obtain copies of this report from the Defense Documentation Center. References to named commercial products in this report are not to be considered in any sense as an endorsement of the product by the United States Air Force or the Government. This report has been reviewed by the Information Office (OI) and is releasable to the National Technical Information Service (NTIS). At NTIS, it will be available to the general public, including foreign nations. APPROVAL STATEMENT This technical report has been reviewed and is approved for publication.

Research paper thumbnail of A Film Cooling Experiment on a Convergent-Divergent Nozzle

When U. S. Government drawings specifications, or other data are used for any purpose other than ... more When U. S. Government drawings specifications, or other data are used for any purpose other than a definitely related Government procurement operation, the Government thereby incurs no responsibility nor any obligation whatsoever, and the fact that the Government may have formulated, furnished, or in any way supplied the said drawings, specifications, or other data, is not to be regarded by implication or otherwise, or in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto. Qualified users may obtain copies of this report from the Defense Documentation Center. References to named commercial products in this report are not to be considered in any sense as an endorsement of the product by the United States Air Korce ar the Government.

Research paper thumbnail of Ceiling board lifter

Research paper thumbnail of Army Science Board 1988 Summer Study Army Testing

Research paper thumbnail of Photograph recording and playback device

Research paper thumbnail of Easy access bow holder

Research paper thumbnail of Exterior ductwork system

Research paper thumbnail of Weaponry bracket assembly

Research paper thumbnail of Barge and walkway connection system

Research paper thumbnail of Some Considerations in the Design of Watercooled Nozzle Throat Sections for High Temperature, High Pressure Operation

Research paper thumbnail of AEDC High-Enthalpy Ablation Test (HEAT) Facility Description, Development, and Calibration

Research paper thumbnail of Avian Predators of Douglas-fir Tussock Moth, Orgyia pseudotsugata (McDunnough), (Lepidoptera: Lymantriidae) in Southwestern Oregon

Environmental Entomology, 1984

... TOROLF R. TORGERSEN, JACK WARD THOMAS, RICHARD R. MASON, AND DENNIS VAN HORN ... minimus West... more ... TOROLF R. TORGERSEN, JACK WARD THOMAS, RICHARD R. MASON, AND DENNIS VAN HORN ... minimus Western tanager, Piranga ludoviciana Pygmy nuthatch, Sitta pygmaea Chestnut-backed chickadee, Parus rufescens Chipping sparrow, Spizella passerina Ruby ...

Research paper thumbnail of Enthalpy probe for arc heater flow diagnostics

28th Thermophysics Conference, 1993

This paper describes accomplishments made in the research and development of a dual sonic nozzle ... more This paper describes accomplishments made in the research and development of a dual sonic nozzle enthalpy probe for arc heater flow diagnostics. The primary concern and focus for the study presented herein, was the fabrication of an internally cooled structure that can survive a steady-state dwell in a severe heating environment. This structure is the housing and thermal protection system

Research paper thumbnail of A stereoselective synthesis of 1,2-diols from α-hydroxyaldehydes

Tetrahedron Letters, 1985

Research paper thumbnail of Breaking with the Model: Creating Approaches to Interactive Distance Learning

International Professional Communication Conference, 1998

Newsgroups and list servers provide a means for extending Internet dialogues beyond the one-on-on... more Newsgroups and list servers provide a means for extending Internet dialogues beyond the one-on-one telephone model. While much of the discourse in these new media is chatter, a small percentage of valuable information is generated. Frequently asked question (FAQ) pages provide a means of distributing such information usefully, but require a considerable editing effort. New approaches use the interactivity of

Research paper thumbnail of Fall and Winter Raptors of Turnbull National Wildlife Refuge, 1972 to 1973

Research paper thumbnail of Network collaboration with UNIX

Technical Communication Quarterly, 1993

Recent advances in computer technology make networking an essential skill for the technical commu... more Recent advances in computer technology make networking an essential skill for the technical communicator. Particularly, the development of local, national, and international computer networks has created a collaborative writing environment. At the heart of the Internet network is the UNIX operating system. The open architecture of UNIX makes it a superior tool for collaborative writing, in the classroom, across the

Research paper thumbnail of Mechanical design of induction motors applied on adjustable speed drives

This paper provides an overview of key mechanical design aspects of induction motors applied to a... more This paper provides an overview of key mechanical design aspects of induction motors applied to adjustable speed drives to their optimize performance and ensure the reliability of the system. Rotating assembly stresses, shaft resonances, bearing limitations and lubrications are discussed and related to practical limitations. An application example and failure analysis from a Chevron production facility are presented to highlight design concerns and key areas of attention required to achieve reliable and cost-effective performance

Research paper thumbnail of The biosynthetic pathway of ecdysone: Studies with vitellogenic ovaries of Locusta migratoria (orthoptera)

Molecular and Cellular Endocrinology, 1982

Ovaries of adult females of Locusta migratoria synthesize impressive amounts of the steroid hormo... more Ovaries of adult females of Locusta migratoria synthesize impressive amounts of the steroid hormone ecdysone (and related ecdysteroids) during the late phases of vitellogenesis. The present study, aimed at elucidating the sequence of the biosynthetic steps that lead from cholesterol to ecdysone, has taken benefit of this remarkable biological model by using a double approach: (1) isolation and physicochemical identification of endogenous biogenetic intermediates; (2) metabolic study of labelled putative precursor molecules. The data presented in this paper lead us to propose the following sequence of events: conversion of cholesterol to 3p-hydroxy-5pcholest-7end-one (via several intermediates not identified in this study) followed by 14p-hydroxylation to 3p,l4cr-dihydroxy-5pholest-7-en&one; hydroxylation on the side-chain at C-25 and C-22 (in this order) to 2-deoxyecdysone; hydroxylation at C-2 to ecdysone.