Search results
(41 - 60 of 5,885)
Pages
- Title
- Screech Tones from Rectangular Jets with Spanwise Oblique Shock-cell Structures
- Creator
- Raman, G.
- Date
- 1997-01-10
- Publisher
- Cambridge Univ Press
- Description
-
Understanding screech is especially important for the design of advanced aircraft because screech can cause sonic fatigue failure of aircraft...
Show moreUnderstanding screech is especially important for the design of advanced aircraft because screech can cause sonic fatigue failure of aircraft structures. Although the connection between shock-cell spacing and screech frequency is well understood, the relation between non-uniformities in the shock-cell structures and the resulting amplitude, mode, and steadiness of screech have remained unexplored. This paper addresses the above issues by intentionally producing spanwise (larger nozzle dimension) variations in the shock-cell structures and studying the resulting spanwise screech mode. The spanwise-oblique shock-cell structures were produced using imperfectly expanded convergent-divergent rectangular nozzles (aspect ratio = 5) with non-uniform exit geometries. Three geometries were studied: (a) a nozzle with a spanwise uniform edge, (b) a nozzle with a spanwise oblique (single-bevelled) edge, and (c) a nozzle that had two spanwise oblique (double-bevelled) cuts to form an arrowhead-shaped nozzle. For all nozzles considered, the screech mode was antisymmetric in the transverse (smaller nozzle dimension) direction allowing focus on changes in the spanwise direction. Three types of spanwise modes were observed: symmetric (I), antisymmetric (II), and oblique (III), The following significant results emerged: (i) for all cases the screech mode corresponds with the spanwise shock-cell structure, (ii) when multiple screech modes are present, the technique presented here makes it possible to distinguish between coexisting and mutually exclusive modes, (iii) the strength of shocks 3 and 4 influences the screech source amplitude and determines whether screech is unsteady. The results presented here offer hope for a better understanding of screech and for tailoring shock-containing jets to minimize fatigue failure of aircraft components.
Show less
- Title
- VALIDATION OF BAKING TO INACTIVATE SALMONELLA IN HIGH-PROTEIN AND HIGH-FAT MODEL FOODS
- Creator
- Wang, Wenqian
- Date
- 2017, 2017-07
- Description
-
Baked food products, such as dry pet foods, undergo changes of temperature and water activity (aw) during forced hot air processes. As one of...
Show moreBaked food products, such as dry pet foods, undergo changes of temperature and water activity (aw) during forced hot air processes. As one of the most thermal resistant microorganisms in low-moisture/intermediate moisture foods, Salmonella’s thermal inactivation kinetics during these processes is not well understood and difficult to predict. The objective of this study was to evaluate thermal inactivation kinetics of Salmonella enterica serovar Agona 447967 in model high-protein (HP) and high-fat (HF) multiple-component foods baked in a laboratory-scale oven, as influenced by oven temperature and relative humidity (RH). Model high-protein and high-fat foods, formulated with wheat flour, soy protein and soy oil, were inoculated with Salmonella Agona to a level of ~9 log CFU/g, and mixed to form a homogenous dough. Dough samples (57 mm diameter x 6 mm thick) were baked (3 samples per dwell time, 6 dwell times per condition) in a lab-scale oven at 120°C (10% RH) and 85°C (20%, 35% RH, 50% RH), respectively. Temperature and aw were measured at the surface and geometric center of the product during baking. Processed samples were collected in sterile bags and immediately cooled in an ice-water bath. Salmonella was enumerated on trypticase soy agar supplemented with yeast extract and incubated at 37°C for 24 h. Similar reductions (p>0.05) of 5.12-, 5.11-, 4.55-, and 4.78-log CFU/g were achieved after 40 min at 120°C/10% RH, 90 min at 85°C/20% RH, 50 min at 85°C/35% RH, 8 min at 85°C/50% RH, respectively, in the high-protein model food. Similar results were achieved in the high-fat matrix. The aw at the geometric center of the product (initially at aw =0.98) did not change appreciably during baking, while the aw at the product surface, the location of least lethality, decreased significantly (p<0.05) during baking; the decreases were more pronounced at lower oven RH. The results indicate that thermal inactivation of Salmonella Agona was driven by temperature and relative humidity in the oven. Higher temperature and higher relative humidity level led to greater Salmonella inactivation.
M.S. in Food Process Engineering, July 2017
Show less
- Title
- Interactive Urban Landmark Kiosks for Memorial Walk of Martin Luther King (sequence unknown), IPRO 314 - Deliverables: IPRO 314 Final Report F09
- Creator
- O’leary, Kevin, Petty, Sonya, Qi, Tianshu, Tan, Sophia, Noor, Nashrah, Schleich, Kenneth, Akhtar, Ayesha, Cheng, Eric, Kim, James, Parker, Joseph, Saha, Sougata
- Date
- 2009-12
- Description
-
The objective of this IPRO is to help the students of Gage Park H.S. bring their vision of a memorial to a historical event into existence.
Spo...
Show moreThe objective of this IPRO is to help the students of Gage Park H.S. bring their vision of a memorial to a historical event into existence.
Sponsorship: Gage Park High School
Deliverables for IPRO 314: Interactive Urban Landmark Kiosks for Memorial Walk of Martin Luther King for the fall 2009 semester.
Show less
- Title
- Combined Magnetic Transducer Head and Coupling Transformer
- Creator
- Wiegand, David E.
- Date
- 1952-02-12
- Description
-
Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent
- Title
- System for Detecting Twist and Bend in Turbine Blades
- Creator
- Bridges, Jack E., Hehn, Anton N., Schwab, Ronald R.
- Date
- 4/24/2009, 1970-03-24
- Description
-
Sponsorship: IIT Research Institute
United States Patent
- Title
- Fab Lab: Creating Design-to-Prototype Learning Modules at the Museum of Science and Industry (sequence unknown), IPRO 333 - Deliverables: IPRO 333 Project Plan F09
- Creator
- Bonesz, Andrew, Clark, Howard, Douglas, Carlie, Gajdorus, Michael, Gottschall, Keenan, Hendricks, Rachel, Kimball, Clayton, Linares, Jared, Marks, Paul, Mellom, James, Oblenida, Cindy, Pop, Sabina, Stelcel, Carl, Young, Jeremy, Zhou, Raymond
- Date
- 2009-12
- Description
-
The primary objective of IPRO 333 is to partner the knowledge and ideas of young engineers, architects, and scientists at IIT with the...
Show moreThe primary objective of IPRO 333 is to partner the knowledge and ideas of young engineers, architects, and scientists at IIT with the resources of the Museum of Science and Industry (MSI) in Chicago. This partnership endeavors to help the museum's Fabrication Laboratory (Fab Lab) maximize its potential as a resource for museum guests, young and old, as well as for IIT students, staff, and faculty.
Sponsorship: Museum of Science and Industry. Steven Willis- Director, Fabrication Lab
Deliverables for IPRO 333: Fab Lab: Creating Design-to-Prototype Learning Modules at the Museum of Science and Industry for the fall 2009 semester
Show less
- Title
- Innovative Uses of Native CAD Files Progress Report June 2011
- Creator
- Kleps, Stephen M., Menches, Cindy
- Date
- 2013-09-18, 2011-06
- Description
-
This publication presents an literature review, progress of an environmental scan, and preliminary findings of research for the project...
Show moreThis publication presents an literature review, progress of an environmental scan, and preliminary findings of research for the project entitled Innovative Uses of Native CAD Files.
Sponsorship: Electri International
Show less
- Title
- Our Energy Future: Lessons in Sustainability AND IPRO Teams for K-12: The Education Outreach Service Learning Cluster (sequence unknown), IPRO 332 - Deliverables: IPRO 332 Poster F09
- Creator
- Chavez, Jorge, Johnson, Ross, Chin, Jason, Grande, Gina, Lay, Livia, Mccloat, Declain, Nguyen, Nam, Olechno, Patrick, Randle, Jennifer, Tyler Ii, Micheal, Vega, Mayra, Weiner, Andrew, Zajac, Gregory
- Date
- 2009-12
- Description
-
The mission of the IPRO is to educate the community, focusing mainly on elementary and high school students, on the issues of sustainability...
Show moreThe mission of the IPRO is to educate the community, focusing mainly on elementary and high school students, on the issues of sustainability and energy conservation. The group looks to expand on the work that has been completed in previous semesters, by adding multi-media presentations to enhance the current teaching modules. Previous modules have presented to classrooms simply with information, and the team looks to add upon this by adding interactive and entertaining materials to intrigue the audience.
Deliverables for IPRO 332: IOur Energy Future: Lessons in Sustainability AND IPRO Teams for K-12: The Education Outreach Service Learning Cluster for the fall 2009 semester
Show less
- Title
- VIBRATIONAL CONTROL OF AN EXOTHERMIC CSTR - PRODUCTIVITY IMPROVEMENT BY MULTIPLE INPUT OSCILLATIONS
- Creator
- Shu, X. S., Rigopoulos, K., Cinar, A.
- Date
- 1989-02
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Description
-
A. Cinar et al. (1987) have shown that vibrational control of an exothermic continuous stirred tank reactor (CSTR) by vibrating the total flow...
Show moreA. Cinar et al. (1987) have shown that vibrational control of an exothermic continuous stirred tank reactor (CSTR) by vibrating the total flow rate modifies its behavior and leads to stabilized operation in its unstable steady-state region. Here, the effect of multiple vibrating inputs and the contribution of their phase shift are investigated. Theoretical and experimental results indicate productivity improvement and amplitude reduction in reactor temperature swings by vibrating both input flow rate and input concentrations.
Endnote format citation
Show less
- Title
- Spherodized Fluorescent Beads for Improved Roadway Pavement Marker Visibility
- Creator
- Kozak, Edward M., Bartholomew, Craig S.
- Date
- 2009-05-11, 1996-05-14
- Description
-
Retroreflective glass or plastic beads have fluorescent properties when irradiated with ultraviolet light and are emplaced in signs in...
Show moreRetroreflective glass or plastic beads have fluorescent properties when irradiated with ultraviolet light and are emplaced in signs in patterns indicative of alphanumeric characters, or embedded in a hot melt comprising road stripes or embedded in the road asphalt or aggregate during construction of the road, to provide effectively bright and clear indications of signs or the extent and direction of the road. The glass beads comprise spherodized soda lime, borosilicate, phosphosilicate or aluminosilicate glasses with low levels of rare-earth dopants mixed therein, such as compounds containing one of the rare earths, or lanthanides. The plastic beads may have fluorescent materials mixed therein, typically organic pigments or dyes based on coumarin and rhodamine or the like.
Sponsorship: IIT Research Institute
United States Patent
Show less
- Title
- New Housing Model "Flexible Housing Components: IMG_7337_EDIT_Crop"
- Creator
- Quinn, Aidan
- Date
- 2012-05-02, 2012-05
- Description
-
This project is a focus on spatial flexibility. The idea is to generate housing components that focuses on flexibility in order to create...
Show moreThis project is a focus on spatial flexibility. The idea is to generate housing components that focuses on flexibility in order to create space that is defined by the user.
Show less
- Title
- Chicago Intermodal Commuter Transit Development: Strailman_Chris_MastersProject_2011
- Creator
- Strailman, Chris
- Date
- 4/27/2011, 2011-05
- Description
-
This project focuses on the connectivity of different forms of transit and different neighborhoods in Chicago. Starting at the scale of city...
Show moreThis project focuses on the connectivity of different forms of transit and different neighborhoods in Chicago. Starting at the scale of city wide transit systems, it narrows down to a specific node and deals with the design and planning of a transit oriented development.
Show less
- Title
- Multi- Generational Housing in China: Mixed-use Multi- Generational Housing in China Final Poster
- Creator
- Liu, Ling
- Date
- 2011-05, 2011-05
- Description
-
In China, too much population causes early retire age, one child policy, extremely high housing pressure, too little land for open space,...
Show moreIn China, too much population causes early retire age, one child policy, extremely high housing pressure, too little land for open space, little or no public facilities. Also, it causes the lost of many long tradition. The losing of multi- generational living is just one of them. This project is a humanistic response to the social problems.
Sponsorship: Denison, Dirk
Show less
- Title
- Automated control of high temperature short time pasteurization
- Creator
- Negiz, A., Cinar, A., Schlesser, J. E., Ramanauskas, P., Armstrong, D. J., Stroup, W.
- Date
- 1996-12
- Publisher
- ELSEVIER SCI LTD
- Description
-
Cascade and multivariable control of a high temperature shot? time (HTST) pasteurization system were tested and compared with the performance...
Show moreCascade and multivariable control of a high temperature shot? time (HTST) pasteurization system were tested and compared with the performance of single-loop feedback control. Multivariable control was implemented on the basis of computations of product temperatures that yield equivalent lethality at a residence time of 15 s at 161 degrees F in the holding tube. Both cascade and multivariable controllers reduced product temperature fluctuations and overshoot compared to single-loop feedback control. Multivariable control was based on on-line computation of equivalent total lethality and it permitted operation at variable flow rates or at the most desirable temperatures for product quality and functionality. Copyright (C) 1996 Elsevier Science Ltd.
Endnote format citation
Show less
- Title
- Jockey's Ridge Research + Education Center: thesis_boards
- Creator
- Landon, Paul
- Date
- 2012, 2012-05
- Description
-
Recent litigation related to offshore oil drilling has threatened North Carolina’s beautiful shoreline and biodiversity. Furthermore, the...
Show moreRecent litigation related to offshore oil drilling has threatened North Carolina’s beautiful shoreline and biodiversity. Furthermore, the Outer Banks have seen a drop in tourism over the past few seasons. With a research and education center, regional alternatives to environmentally costly drilling can be developed, while culturally providing a destination that celebrates and elucidates the fragility and splendor of the OBX.
Show less
- Title
- The synchronous motor
- Creator
- Sleezer, Frank W., Williams, Wallace, Kelkenney, Artemas A.
- Date
- 2009, 1907
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/synchronousmotor00slee
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaves 35-37
- Title
- Magnetic Record Player
- Creator
- Camras, Marvin
- Date
- 1953-03-31
- Description
-
Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent
- Title
- System and Method for Determining and Sharing Spectrum Availability
- Creator
- Taher, Tanim, Roberson, Dennis
- Date
- 2017-06-16, 2017-06-13
- Description
-
A method and apparatus for determining and sharing RF spectrum availability. The method includes automatically sensing and analyzing a...
Show moreA method and apparatus for determining and sharing RF spectrum availability. The method includes automatically sensing and analyzing a spectrum to identify used and/or unused portions of the spectrum, and automatically communicating the used and/or unused portions of the spectrum to a spectrum owner or a spectrum user. The invention has particular use in automatically identifying and quantifying current spectrum users, automatically reporting the current spectrum users to a spectrum owner, and/or allocating unused spectrum portions to users.
Sponsorship: Illinois Institute of Technology
United States Patent
Show less
- Title
- Hostile Spaces and Hostel Spaces: Re-Visioning Highway Infrastructure
- Creator
- Smith, Kevin
- Date
- 2010-07-30