Search

Search Results

• 2741. [Article] Quench Factor Characterization of Steel Hardening: A Review

  A quench factor, Q, has been derived that quantifies the overall severity of the steel hardening process—quench severity by interrelating steel hardenability with quenching variables including: the specific ...

  Citation × Citation Citation Abstract Copy Title: Quench Factor Characterization of Steel Hardening: A Review Author: Otero, Rosa Lucia Simencio, Otero, Walker Roberto, Totten, George E., Canale, Lauralice C.F. Year: 2014 A quench factor, Q, has been derived that quantifies the overall severity of the steel hardening process—quench severity by interrelating steel hardenability with quenching variables including: the specific quenchant being used, agitation, bath temperature, etc. In this analysis, quench severity is quantified by a so-called “quench factor” (Q) that is a single numerical value that effectively indicates the extent to which a given steel can be hardened. This article provides a description of the concept and an overall review of applications where it has been successfully applied. Title: Quench Factor Characterization of Steel Hardening: A Review Author: Otero, Rosa Lucia Simencio, Otero, Walker Roberto, Totten, George E., Canale, Lauralice C.F. Year: 2014 A quench factor, Q, has been derived that quantifies the overall severity of the steel hardening process—quench severity by interrelating steel hardenability with quenching variables including: the specific quenchant being used, agitation, bath temperature, etc. In this analysis, quench severity is quantified by a so-called “quench factor” (Q) that is a single numerical value that effectively indicates the extent to which a given steel can be hardened. This article provides a description of the concept and an overall review of applications where it has been successfully applied. Close

• 2742. [Article] Cherry bark tortrix moth

  Published 1992. Reviewed May 2015. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog/catalog

  Citation × Citation Citation Abstract Copy Title: Cherry bark tortrix moth Author: DeAngelis, Jack D., Oregon State University. Extension Service, Westcott, R. L. Published 1992. Reviewed May 2015. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog/catalog Title: Cherry bark tortrix moth Author: DeAngelis, Jack D., Oregon State University. Extension Service, Westcott, R. L. Published 1992. Reviewed May 2015. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog/catalog Close

• 2743. [Article] Cakes

  Reprinted March 2004. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog

  Citation × Citation Citation Abstract Copy Title: Cakes Author: Raab, Carolyn A., Oregon State University. Extension Service Reprinted March 2004. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Cakes Author: Raab, Carolyn A., Oregon State University. Extension Service Reprinted March 2004. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 2744. [Article] Oregon vegetable digest ; Vol. 9 No. 3

  Published July 1960. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog

  Citation × Citation Citation Abstract Copy Title: Oregon vegetable digest ; Vol. 9 No. 3 Author: Morrison, H. E., Sistrunk, W. A., Frazier, W. A., Oregon State University. Agricultural Experiment Station, Mack, H. J. Published July 1960. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Oregon vegetable digest ; Vol. 9 No. 3 Author: Morrison, H. E., Sistrunk, W. A., Frazier, W. A., Oregon State University. Agricultural Experiment Station, Mack, H. J. Published July 1960. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 2745. [Article] A study of public perceptions of energy issues and technology for the development of engineering education activities

  Human use of fossil fuels has caused a dramatic shift in the earth’s environment, with global temperatures rising and ecosystem health declining. The need for the human species to reduce our reliance on ...

  Citation × Citation Citation Abstract Copy Title: A study of public perceptions of energy issues and technology for the development of engineering education activities Author: Hinkle, Nathan Human use of fossil fuels has caused a dramatic shift in the earth’s environment, with global temperatures rising and ecosystem health declining. The need for the human species to reduce our reliance on fossil fuels is apparent. This will be achieved by replacing conventional energy resources with sustainable alternatives, and by reducing overall energy consumption on both a personal and global scale. Citizens must be engaged and informed on energy issues in order to achieve the drastic changes required. This project studied public perceptions and understandings of energy issues and technologies through survey research, and developed five new engineering education activities to address knowledge gaps identified in the survey. These activities have been conducted with groups of students at OSU, revised based on student feedback, and will be made available to educators online. Title: A study of public perceptions of energy issues and technology for the development of engineering education activities Author: Hinkle, Nathan Human use of fossil fuels has caused a dramatic shift in the earth’s environment, with global temperatures rising and ecosystem health declining. The need for the human species to reduce our reliance on fossil fuels is apparent. This will be achieved by replacing conventional energy resources with sustainable alternatives, and by reducing overall energy consumption on both a personal and global scale. Citizens must be engaged and informed on energy issues in order to achieve the drastic changes required. This project studied public perceptions and understandings of energy issues and technologies through survey research, and developed five new engineering education activities to address knowledge gaps identified in the survey. These activities have been conducted with groups of students at OSU, revised based on student feedback, and will be made available to educators online. Close

• 2746. [Article] Rope Selection for Rope Drive Transmissions Used in Robotic Manipulation

  Wire and fiber ropes used in rigorous CBOS (cyclic bend over sheave) applications were investigated. Small diameter stainless steel, tungsten, and Vectran® ropes were tested over small sheaves at high ...

  Citation × Citation Citation Abstract Copy Title: Rope Selection for Rope Drive Transmissions Used in Robotic Manipulation Author: Summers, Michael P. Wire and fiber ropes used in rigorous CBOS (cyclic bend over sheave) applications were investigated. Small diameter stainless steel, tungsten, and Vectran® ropes were tested over small sheaves at high loads and cycle speeds. Sheaves were made with Al6061-T6511 and Al7075-T651 and were coated with 0.002” hard coat anodize; some were dipped in Teflon®. Tungsten was found to have the highest bending fatigue resistance. Vectran® melted under the fast cycle speeds due to rope temperature. Neither aluminium hardness or Teflon® dip caused an increase in sheave wear resistance or rope life. Title: Rope Selection for Rope Drive Transmissions Used in Robotic Manipulation Author: Summers, Michael P. Wire and fiber ropes used in rigorous CBOS (cyclic bend over sheave) applications were investigated. Small diameter stainless steel, tungsten, and Vectran® ropes were tested over small sheaves at high loads and cycle speeds. Sheaves were made with Al6061-T6511 and Al7075-T651 and were coated with 0.002” hard coat anodize; some were dipped in Teflon®. Tungsten was found to have the highest bending fatigue resistance. Vectran® melted under the fast cycle speeds due to rope temperature. Neither aluminium hardness or Teflon® dip caused an increase in sheave wear resistance or rope life. Close

• 2747. [Article] Accurately tunable low-voltage continuous-time filters

  A tuning technique which tunes the continuous time filter very accurately is proposed in this thesis. This technique overcomes the problem of master slave mismatch, thus tuning the filter accurately. The ...

  Citation × Citation Citation Abstract Copy Title: Accurately tunable low-voltage continuous-time filters Author: Vemulapalli, Gowtham A tuning technique which tunes the continuous time filter very accurately is proposed in this thesis. This technique overcomes the problem of master slave mismatch, thus tuning the filter accurately. The mismatch minimization is done on power up on foreground while the background tuning is always operational. Once the mismatch is minimized on power up, the power up foreground tuning can be turned off and the background tuning takes care of temperature and process variations. This thesis also discusses various techniques to improve the linearity of the filter. Low-voltage issues in the design of continuous-time filters are presented. A 200 kHz 2nd order low-pass filter is implemented in 0.18u CMOS to demonstrate the technique proposed and measurement results indicate that this technique gives accurate corner frequency tuning. Title: Accurately tunable low-voltage continuous-time filters Author: Vemulapalli, Gowtham A tuning technique which tunes the continuous time filter very accurately is proposed in this thesis. This technique overcomes the problem of master slave mismatch, thus tuning the filter accurately. The mismatch minimization is done on power up on foreground while the background tuning is always operational. Once the mismatch is minimized on power up, the power up foreground tuning can be turned off and the background tuning takes care of temperature and process variations. This thesis also discusses various techniques to improve the linearity of the filter. Low-voltage issues in the design of continuous-time filters are presented. A 200 kHz 2nd order low-pass filter is implemented in 0.18u CMOS to demonstrate the technique proposed and measurement results indicate that this technique gives accurate corner frequency tuning. Close

• 2748. [Article] Internal density currents generated in a density stratified reservoir during withdrawal

  The nature of flow in stratified reservoirs has been studied and a method developed, based on a laboratory model study, to predict the quality of the water discharged from the reservoir. The experimental data ...

  Citation × Citation Citation Abstract Copy Title: Internal density currents generated in a density stratified reservoir during withdrawal Author: Thornton, Edward Bennett The nature of flow in stratified reservoirs has been studied and a method developed, based on a laboratory model study, to predict the quality of the water discharged from the reservoir. The experimental data has been evaluated in dimensionless form, so that the results may be applied to actual reservoirs. The model was designed to simulate a relatively high head dam impounding a stratified reservoir in which the density gradient is approximately linear. The extent and magnitude of internal density currents can be determined, and the properties of the discharged water can be predicted from measurements of flow rate, density gradient, and depth. The temperature of the discharged water, effect on downstream environment, and change in the thermal structure of the reservoir are among the quantities which may be forecast. Illustrations have been provided to show the degree of control of water quality available by regulation of the reservoir water discharge. Title: Internal density currents generated in a density stratified reservoir during withdrawal Author: Thornton, Edward Bennett The nature of flow in stratified reservoirs has been studied and a method developed, based on a laboratory model study, to predict the quality of the water discharged from the reservoir. The experimental data has been evaluated in dimensionless form, so that the results may be applied to actual reservoirs. The model was designed to simulate a relatively high head dam impounding a stratified reservoir in which the density gradient is approximately linear. The extent and magnitude of internal density currents can be determined, and the properties of the discharged water can be predicted from measurements of flow rate, density gradient, and depth. The temperature of the discharged water, effect on downstream environment, and change in the thermal structure of the reservoir are among the quantities which may be forecast. Illustrations have been provided to show the degree of control of water quality available by regulation of the reservoir water discharge. Close

• 2749. [Article] Effect of silicon/paraffin treatment on dimensional stability of red oak, douglas-fir, and ponderosa pine

  Red oak, Douglas-fir, and ponderosa pine lumber was treated with a silicon/paraffinic system to assess the ability of the treatment to limit dimensional changes and moisture uptake during changes in temperature ...

  Citation × Citation Citation Abstract Copy Title: Effect of silicon/paraffin treatment on dimensional stability of red oak, douglas-fir, and ponderosa pine Author: Morrell, Jeffrey J., Love, Connie S. Red oak, Douglas-fir, and ponderosa pine lumber was treated with a silicon/paraffinic system to assess the ability of the treatment to limit dimensional changes and moisture uptake during changes in temperature or relative humidity. The treatment initially had little effect on either property, but the magnitude of weight gain and dimensional changes tended to decline with repeated moisture cycles. The results suggest that the silicon/paraffin treatment had the potential to limit vapor moisture sorption and could reduce the potential for wood to deform with repeated moisture cycles. Title: Effect of silicon/paraffin treatment on dimensional stability of red oak, douglas-fir, and ponderosa pine Author: Morrell, Jeffrey J., Love, Connie S. Red oak, Douglas-fir, and ponderosa pine lumber was treated with a silicon/paraffinic system to assess the ability of the treatment to limit dimensional changes and moisture uptake during changes in temperature or relative humidity. The treatment initially had little effect on either property, but the magnitude of weight gain and dimensional changes tended to decline with repeated moisture cycles. The results suggest that the silicon/paraffin treatment had the potential to limit vapor moisture sorption and could reduce the potential for wood to deform with repeated moisture cycles. Close

• 2750. [Article] Scaling of the thermal mixing processes within the lower plenums of VHTR designs

  The Very High Temperature Reactor (VHTR) design was one of six designs chosen for development under the Generation IV initiative. Thermal mixing of the coolant at the exit of the reactor has been a common ...

  Citation × Citation Citation Abstract Copy Title: Scaling of the thermal mixing processes within the lower plenums of VHTR designs Author: Van Horn, Matthew A. The Very High Temperature Reactor (VHTR) design was one of six designs chosen for development under the Generation IV initiative. Thermal mixing of the coolant at the exit of the reactor has been a common concern for VHTR reactor designs. Thermal mixing processes are commonly investigated through the use of scaled experimental models. Accurate scaling methods are essential for designing experimental facilities that accurately reproduce the thermal mixing processes of the VHTR design under investigation. A scaling method that is based upon a two-equation turbulence closure model is developed in this paper. Numerical studies performed verify that this scaling method correctly identifies the similarity parameters of the k-ε turbulence closure model and preserves the turbulent processes within the flow. Title: Scaling of the thermal mixing processes within the lower plenums of VHTR designs Author: Van Horn, Matthew A. The Very High Temperature Reactor (VHTR) design was one of six designs chosen for development under the Generation IV initiative. Thermal mixing of the coolant at the exit of the reactor has been a common concern for VHTR reactor designs. Thermal mixing processes are commonly investigated through the use of scaled experimental models. Accurate scaling methods are essential for designing experimental facilities that accurately reproduce the thermal mixing processes of the VHTR design under investigation. A scaling method that is based upon a two-equation turbulence closure model is developed in this paper. Numerical studies performed verify that this scaling method correctly identifies the similarity parameters of the k-ε turbulence closure model and preserves the turbulent processes within the flow. Close