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Title: MOBILE ANDROID SENSOR SYSTEM FOR REAL-TIME PATIENT MONITORING AND HEALTHCARE APPLICATION
Creator: Yi, Won-jae
Date: 2012-04-25, 2012-05
Description: A system using Android devices that collects, displays sensor data on the screen and streams to the central server in real-time is presented...
Show moreA system using Android devices that collects, displays sensor data on the screen and streams to the central server in real-time is presented in this research. Common Android devices, such as smartphones and tablets, are considered for this system to demonstrate its flexibility and compatibility of the application on any Android device. Bluetooth and wireless Internet connections are used for data transmission among the devices. Also, using Near Field Communication (NFC) technology on the smartphone, the system constructs a more efficient and convenient mechanism to achieve an automatic Bluetooth connection and an automatic application execution. This system is beneficial on Body Sensor Network (BSN) establishments for medical healthcare applications by adding wireless technology. Various types of sensors can be adapted to monitor a patient’s status in real-time. For demonstration purposes, an accelerometer, a temperature sensor and vital signs signal sensor data, including electrocardiography (ECG), blood pressure, electroencephalography (EEG) and respiration, are used to perform the experiment to provide fundamentals of remote patient diagnosis. Raw sensor data is interpreted to either graphical or text notations to be presented on the Android device and the central server. Furthermore, a Java-based central server application is introduced to demonstrate communication with the Android system for data storage and analysis through Internet connections. This system is capable of data transmission in real-time without exploiting system resources for data collection and interpretation. This system is also can be further extended for additional sensors, such as a sweatiness sensor, an electromyography (EMG) sensor, a glucose sensor and more for enhanced patient status diagnosis.
M.S. in Computer Engineering, May 2012
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Title: AN ANALYTICAL APPROACH TO REAL-TIME MISBEHAVIOR DETECTION IN IEEE 802.11 WIRELESS NETWORKS
Creator: Chen, Ying
Date: 2011-07, 2011-07
Description: It is easy for the malicious nodes to take advantage of CSMA/CA based wireless protocols to gain unfair larger share of the network throughput...
Show moreIt is easy for the malicious nodes to take advantage of CSMA/CA based wireless protocols to gain unfair larger share of the network throughput because of the distributed nature of the IEEE 802.11 distributed coordination function (DCF). The backoff misbehavior will happen when one node deliberately chooses smaller backoff parameters. This paper adopts a promising non-parametric cumulative sum test (CUSUM) based scheme to quickly find abrupt changes in a process without prior knowledge of the statistics of the change occurrences. According to a Markov chain based analytical model, we can systematically study the real-time misbehavior detection results from CUSUM based method, thus quantitatively computer the system configuration parameters for guaranteed performance in terms of average false positive rate, average detection delay, and missed detection ratio.
M.S. in Computer Engineering, July 2011
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Title: Doing What I Say: Connecting Congressional Social Media Behavior and Congressional Voting
Creator: Shapiro, Matthew A., Hemphill, Libby, Otterbacher, Jahna
Date: 2012-03-10, 2012-03-10
Description: Public officials’ communication has been explored at length in terms of how such their statements are conveyed in the traditional media, but...
Show morePublic officials’ communication has been explored at length in terms of how such their statements are conveyed in the traditional media, but minimal research has been done to examine their communication via social media. This paper explores the kinds of statements U.S. officials are making on Twitter in terms of the actions they are trying to achieve. We then analyze the correlation between these statements, Congressional communication network structures, and voting behavior. Our analysis leverages over 29,000 tweets by members of Congress in conjunction with existing DW-NOMINATE voting behavior data. We find that pro-social and self-promoting statements correlate with Congressional voting records but that position within the Congressional communication network does not correlate with voting behavior.
Sponsorship: Social Networks Research Group at IIT, IIT Graduate College
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Title: IMPACT OF THERMAL AND HIGH PRESSURE PROCESSING ON THE ANTIGENICITY AND DETECTABILITY OF EGG AND MILK ALLERGENS
Creator: Yang, Shuopeng
Date: 2013, 2013-12
Description: Cow’s milk allergy and egg allergy are the two most prevalent food allergies in the United States. Enzyme-linked immunosorbent assay (ELISA),...
Show moreCow’s milk allergy and egg allergy are the two most prevalent food allergies in the United States. Enzyme-linked immunosorbent assay (ELISA), based on antigen-antibody reactions, is the most popular method used by the food industry to detect allergen residues. Thermal treatments are the traditional food processing methods, while high pressure processing (HPP) has increasingly been applied as an alternative food processing technology. This research examined how thermal and high pressure processing may affect the antigenicity and detectability of milk and egg allergens. The first part of this study examined the performance of four ELISA test kits (Veratox for Total Milk Allergen, Biokits BLG Assay Kit, ELISA Systems Casein and BLG Residue Assays) for quantitation of milk residues in packaged foods that have been subjected to different degrees of processing. Whether standard reference materials (SRM) can be used to compare the relative performance of these test kits was also examined. Commercial food products including ice creams, cookies, fried fish sticks, and canned soups were chosen to represent foods that have been pasteurized, baked, fried, and autoclaved, respectively. Calcium caseinate, NIST non-fat dry milk (NFDM) SRM #1549 and USDA certified whey protein were used as reference standards. Veratox and ELISA Systems Casein kits, both of which use NFDM as the calibrator, showed similar readings for ice cream. However, the Casein kit tended to register a lower level of milk residues in other thermal processed products, especially for canned soup where the test kit showed a 50-fold lower level of milk residue than that reported by the Veratox kit. Using whey protein as a reference standard, the two BLG test kits showed a similar level of whey protein equivalent in ice cream, but for fish stick, cookie, and canned soup samples, the x ELISA Systems BLG kit registered values about 4-, 39-, and 17-fold lower than the values obtained by the Biokits BLG test kit, suggesting that the ELISA Systems kit has a greatly reduced sensitivity for foods that have received heat treatments. When using NIST NFDM as the reference standard, the Veratox and Biokits registered the same level of NFDM equivalent in ice cream, but the Biokits gave a higher level for the fish, cookies, and soup samples, indicating that this kit has a better sensitivity for heat processed food. Overall, different test kits registered different levels of milk even for the same commercial sample. The use of common reference materials provides a means for comparison, but the quantitation of milk residues is still complicated by the different heat sensitivity of each test kit. The second part of this study evaluated the impact of thermal processing on the solubility and antigenicity of egg allergens. Solutions (5 mg/ml sample in PBS) of Henningsen dehydrated whole egg, ovalbumin (OVA), and ovomucoid (OVO) were subjected to three different thermal processing conditions (heated in water at 60℃, 100℃, and autoclaved) for 10 minutes. The solubility of the unheated and heat-treated samples was determined by the BCA total protein assay. Changes in the antigenicity (IC50 value) of egg proteins after thermal treatments were determined by inhibition ELISA. Differences in the antigenicity determined as affected by the use of different target protein, coating antigen, and primary antibody were determined. At 60℃, the solubility and antigenicity of heat treated samples showed similar results as those of untreated sample. For sample treated under other conditions, different heat treatments affect the solubility of egg protein samples differently. Different heat processes, different antigen-antibody combinations, and different extraction methods could affect the IC50 values xi differently, which means the antigenicity changed differently due to different influence factors (e.g. IC50 values of OVO always increased after boiling or autoclaving treatment no matter which coating antigen and primary antibody chose, however OVA and whole egg powder showed uncertain changes). The last part of this study evaluated the impact of high pressure processing on the solubility, antigenicity, and the detectability of egg allergens. Solutions of dehydrated whole egg, OVA, OVO, and Egg Beater (ConAgra Foods) were subjected to high pressure treatments for 3 min under 4 conditions (400MPa 20℃, 400MPa 60℃, 600MPa 20℃, and 600MPa 60℃). The amount of protein in the high pressure treated samples was determined by BCA assay and the Veratox egg allergen test kits. Changes in protein antigenicity were determined by inhibition ELISA assay. The results showed that high pressure treatments under all 4 conditions did not affect the solubility and antigenicity of the egg proteins in the treated samples. HPP did not affect the detectability of these proteins by Veratox test either.
M.S. in Food Safety and Technology, December 2013
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Title: Modeling, monitoring and control strategies for high temperature short time pasteurization systems - 1. Empirical model development
Creator: Negiz, A., Ramanauskas, P., Cinar, A., Schlesser, J. E., Armstrong, D. J.
Date: 1998-02
Publisher: ELSEVIER SCI LTD
Description: Dynamic models of high temperature short time (HTST) pasteurization systems can be developed by using empirical model development paradigms...
Show moreDynamic models of high temperature short time (HTST) pasteurization systems can be developed by using empirical model development paradigms such as transfer functions and times series models. Properly designed experiments that excite all output variables provide good data that enable the development of accurate dynamic models. These models are used in feedback control and statistical process monitoring system design. The methodology for time series model development for HTST pasteurization processes is illustrated by using data collected from a pilot scale HTST pasteurization system.
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Title: OPERATION AND PLANNING OF COORDINATED NATURAL GAS AND ELECTRICITY INFRASTRUCTURES
Creator: Zhang, Xiaping
Date: 2015, 2015-07
Description: Natural gas is becoming rapidly the optimal choice for fueling new generating units in electric power system driven by abundant natural gas...
Show moreNatural gas is becoming rapidly the optimal choice for fueling new generating units in electric power system driven by abundant natural gas supplies and environmental regulations that are expected to cause coal-fired generation retirements. The growing reliance on natural gas as a dominant fuel for electricity generation throughout North America has brought the interaction between the natural gas and power grids into sharp focus. The primary concern and motivation of this research is to address the emerging interdependency issues faced by the electric power and natural gas industry. This thesis provides a comprehensive analysis of the interactions between the two systems regarding the short-term operation and long-term infrastructure planning. Natural gas and renewable energy appear complementary in many respects regarding fuel price and availability, environmental impact, resource distribution and dispatchability. In addition, demand response has also held the promise of making a significant contribution to enhance system operations by providing incentives to customers for a more flat load profile. We investigated the coordination between natural gas-fired generation and prevailing nontraditional resources including renewable energy, demand response so as to provide economical options for optimizing the short-term scheduling with the intense natural gas delivery constraints. As the amount and dispatch of gas-fired generation increases, the long-term interdependency issue is whether there is adequate pipeline capacity to provide sufficient gas to natural gas-fired generation during the entire planning horizon while it is widely used outside the power sector. This thesis developed a co-optimization planning model by incorporating the natural gas transportation system into the multi-year resource and transmission system planning problem.This consideration would provide a more comprehensive decision for the investment and accurate assessment for system adequacy and reliability. With the growing reliance on natural gas and widespread utilization of highly efficient combined heat and power (CHP), it is also questionable that whether the independent design of infrastructures can meet potential challenges of future energy supply. To address this issue, this thesis proposed an optimization framework for a sustainable multiple energy system expansion planning based on an energy hub model while considering the energy efficiency, emission and reliability performance. In addition, we introduced the probabilistic reliability evaluation and flow network analysis into the multiple energy system design in order to obtain an optimal and reliable network topology.
Ph.D. in Electrical and Computer Engineering, July 2015
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Title: Zero CommunIITy: A Prototype for a Zero-Energy Residential Development (sequence unknown), IPRO 323 - Deliverables: IPRO 323 IPRO Day Presentation F09
Creator: Bohac, Adam, Brady, David, Bueno, Juan, Coughlin, Daniel, Depalma, Lowell, Gonzalez, Juan, Gross, Josh, Hernandez, Carlos, Iversen, Jennifer, Mckinley, Keanen, Moceri, Michael, Modi, Nishant, Wisniewski, Anthony, Zacharias, Bryan
Date: 2009-12
Description: The teams purpose is to seek a union between living comfortably and living sustainably. To design for a future Chicago‐area community, which...
Show moreThe teams purpose is to seek a union between living comfortably and living sustainably. To design for a future Chicago‐area community, which first minimizes its energy consumption and then uses the most sustainable methods to fulfill the remaining needs of the inhabitants. Ideally we will design a model community which will challenge conventions within the fields of design, planning, engineering, and everyday living. This community will also serve as an example to Chicago‐area municipalities about the benefits of sustainable planning, design, and living.
Sponsorship: Consultant from A. Epstein & Sons; Jeremy Poling
Deliverables for IPRO 323:Zero CommunIITy: A Prototype for a Zero-Energy Residential Development for the fall 2009 semester
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Title: STUDIES IN NONEQUILIBRIUM STATISTICAL MECHANICS
Creator: Wang, Huichao
Date: 2013-05-08, 2013-05
Description: This thesis gives a brief outline of how the microscopic representation enters into a good description of the elasticity of a fluid. We first...
Show moreThis thesis gives a brief outline of how the microscopic representation enters into a good description of the elasticity of a fluid. We first introduce the hydrodynamics by three continuity equations. Due to its macroscopic background, we point out its limitation that it does not fit well with the elastic behavior of the fluid. Therefore we introduce the microscopic description of the system. In order to connect the elasticity which is obviously involved in the non-equilibrium state of a fluid, we discuss how non-equilibrium mechanics could be related to equilibrium mechanics by the assumption that the system is not far away from equilibrium. Under this assumption, an analysis of equilibrium mechanics is necessary, and combining with the microscopic representation, we derive the generalized Langevin equation as an equation of motion of the momentum current, which is endowed with the elastic property, consistent with observations of the fluid.
M.S. in in Physics, May 2013
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Title: Cure for the IKIA Syndrome : presented at IACRL 2008 conference: Final assignment 2
Creator: Uth, Charles, Link, Jeanne
Date: 2008-02
Description: Informal observations of a practical and creative approach piloting Blended Library Instruction for undergraduate Civil Architecture and...
Show moreInformal observations of a practical and creative approach piloting Blended Library Instruction for undergraduate Civil Architecture and Engineering students, in collaboration with faculty. At Illinois Institute of Technology students don’t receive library instruction as a required class or in tandem with a composition class. Faculty will schedule one-time sessions, which ideally should be planned with a class assignment in mind, but students are rarely engaged with a one time instruction. Many have IKIA syndrome or I Know It Already syndrome. The Millennials are a group that has integrated technology into every aspect of their lives and they assume that retrieving useful or necessary information will be easy. When they discover this isn’t the case lack of time, heightened anxiety, and increased frustration can prevent them from doing their best work. By intentionally creating a similar crisis prior to library instruction, students were more interested in what they stood to gain during pending library instruction. In this presentation we will discuss: 1) A creative means of delivering library instruction to a traditionally challenging population: engineering undergraduate students 2) Qualitative information collected via multiple assignments and interpreted in a quantitative fashion, as well as our observations. 3) A method for preparing students for library instruction that can be applied in almost any discipline without asking the instructor to sacrifice class time.
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Title: Measurement of hadron production in Deep Inelastic Scattering, Proceedings of the XLIII International Symposium on Multiparticle Dynamics
Creator: Jung, H.
Date: 2013-09-15, 2013-09-15
Publisher: IIT Press
Description: Measurements of charged particle densities and K⁰s and Λ production in deep inelastic scattering at HERA are presented and compared to Monte...
Show moreMeasurements of charged particle densities and K⁰s and Λ production in deep inelastic scattering at HERA are presented and compared to Monte Carlo event generator predictions. The measurements provide sensitive tests for the initial state parton radiation process as well as for the hadronization process.
Sponsorship: IIT College of Science, High Energy Physics Division of Argonne National Laboratory
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Title: ANALYSIS OF VARIATION IN MULTISTAGE MANUFACTURING PROCESS BASED ON TREE REGRESSION
Creator: Chen, Zhefu
Date: 2014, 2014-05
Description: In a multistage manufacturing process, variation propagates in the process when we produce products from stage to stage. Since there are...
Show moreIn a multistage manufacturing process, variation propagates in the process when we produce products from stage to stage. Since there are limits of reducing variation through process in traditional industrial management and it is hard to monitor the process when the engineering domain knowledge is insufficient. We investigated statistical methods based on piecewise tree regression model including: CART, Bayesian CART, Bayesian treed linear model and Bayesian treed Gaussian process to multistage manufacturing process. The difference performances between models were discussed in a wafer manufacturing process case as a result comparison. Key Words: Multistage process, variation propagation, process monitoring, piecewise tree regression
M.S. in Applied Mathematics, May 2014
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Title: Innovative Actuators for Active Flow and Noise Control
Creator: Cain, A. B., Raman, G.
Date: 2002
Publisher: Professional Engineering Publishing Ltd
Description: Active flow control (AFC) has the potential to improve the efficiency of systems that involve both internal and external fluid flow. The...
Show moreActive flow control (AFC) has the potential to improve the efficiency of systems that involve both internal and external fluid flow. The primary driver in AFC is the expectation that the control will result in significant performance benefits at the system level with all trade-offs factored in. Successful application to aircraft systems can produce lighter, stealthier, agile aircraft with increased range, payload and a muffled acoustic signature. The design of an AFC system requires knowledge of flow phenomena and the selection of appropriate actuators, sensors and a control algorithm. The present overview focuses on actuators. Examples of flow and noise control presented here are restricted to open-loop systems. Various aspects of actuator utilization include actuator output characterization, exploiting resonances (plenum, structural or aeroacoustic) to enhance actuator amplitude and the different modes of actuation. A brief description of a high-bandwidth actuator is also provided, followed by a variety of application examples including edgetone suppression, cavity noise suppression, impingement noise suppression and jet mixing enhancement. The review concludes with a description of the successful application of AFC to the exhaust plume from an aircraft engine (JT8D).
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Title: Zero CommunIITy: A Prototype for a Zero-Energy Residential Development (sequence unknown), IPRO 323 - Deliverables: IPRO 323 Brochure F09
Creator: Bohac, Adam, Brady, David, Bueno, Juan, Coughlin, Daniel, Depalma, Lowell, Gonzalez, Juan, Gross, Josh, Hernandez, Carlos, Iversen, Jennifer, Mckinley, Keanen, Moceri, Michael, Modi, Nishant, Wisniewski, Anthony, Zacharias, Bryan
Date: 2009-12
Description: The teams purpose is to seek a union between living comfortably and living sustainably. To design for a future Chicago‐area community, which...
Show moreThe teams purpose is to seek a union between living comfortably and living sustainably. To design for a future Chicago‐area community, which first minimizes its energy consumption and then uses the most sustainable methods to fulfill the remaining needs of the inhabitants. Ideally we will design a model community which will challenge conventions within the fields of design, planning, engineering, and everyday living. This community will also serve as an example to Chicago‐area municipalities about the benefits of sustainable planning, design, and living.
Sponsorship: Consultant from A. Epstein & Sons; Jeremy Poling
Deliverables for IPRO 323:Zero CommunIITy: A Prototype for a Zero-Energy Residential Development for the fall 2009 semester
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Title: STABILITY OF TUBULAR AND AUTOTHERMAL PACKED-BED REACTORS USING PHASE PLANE ANALYSIS
Creator: Chylla, R. W., Adomaitis, R. A., Cinar, A.
Date: 1987-07
Publisher: AMER CHEMICAL SOC
Description: The regions of stability and parametric sensitivity of countercurrent reactor/heat exchangers are determined explicitly in the plane of inlet...
Show moreThe regions of stability and parametric sensitivity of countercurrent reactor/heat exchangers are determined explicitly in the plane of inlet feed temperature-inlet coolant temperature. The concept of phase plane analysis is generalized to include all orders of reaction rate expressions, a broader range of system parameters, and is extended to the case of autothermal reactors. An industrial hydrocarbon oxidation reactor model and an autothermal CO oxidation reactor model have been used to illustrate and to evaluate the analysis method. The approach presented here is appealing since the region of safe inlet temperatures is determined explicitly and the region of safe operation can be optimized with respect to the reactor design parameters.
Endnote format citation
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Title: Contrails: The Evolution of an Air Force Technical Reports Digitization Project: Contrails DLC Meeting Presentation
Creator: Ahrens, Aric G.
Date: 2005-10-18
Description: A presentation given at the Fall 2005 Depository Library Council Meeting in Washington, D.C. The presentation describes the efforts to make...
Show moreA presentation given at the Fall 2005 Depository Library Council Meeting in Washington, D.C. The presentation describes the efforts to make accessible to the researchers and the public a collection of Air Force technical reports left at IIT by the Crerar Library when they moved to the University of Chicago. Covered is the period 1996-2005.
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Title: Adaptive control strategy for regulation of blood glucose levels in patients with type 1 diabetes
Creator: Eren-oruklu, Meriyan, Cinar, Ali, Quinn, Lauretta, Smith, Donald
Date: 2009-09
Publisher: ELSEVIER SCI LTD
Description: Current insulin therapy for patients with type 1 diabetes often results in high variability in blood glucose concentrations and may cause hype...
Show moreCurrent insulin therapy for patients with type 1 diabetes often results in high variability in blood glucose concentrations and may cause hype rglycemic/hypoglycemic episodes. Closing the glucose control loop with a fully automated electro-mechanical pancreas will improve the quality of life for insulin-dependent patients. An adaptive control algorithm is proposed to keep glucose concentrations within normoglycemic range and dynamically respond to glycemic challenges. A model-based control strategy is used to calculate the required insulin infusion rate, while the model parameters are recursively tuned. The algorithm handles delays associated with insulin absorption, time-lag between subcutaneous and blood glucose concentrations, and variations in inter/intra-subject glucose-insulin dynamics. Simulation results for simultaneous meat and physiological disturbances are demonstrated for subcutaneous insulin infusion.
Endnote format citation for DOI:10.1016/j.jprocont.2009.04.004
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Title: IMPROVING CRITERION-RELATED VALIDITY IN PERSONALITY QUESTIONNAIRES AT THE ITEM LEVEL
Creator: Dimitrov, Roger
Date: 2015, 2015-05
Description: When using a personality questionnaire for predicting behavior, criterion-related validity improvements have historically focused on improving...
Show moreWhen using a personality questionnaire for predicting behavior, criterion-related validity improvements have historically focused on improving scale level construction techniques over examining the global impact of item-level characteristics on criterion-related validity. This article investigates the impact of item-level characteristics on the criterion-related validity of the Five-Factor Model (FFM) (as a personality instrument) as a predictor of job-related behavior. Two self-report FFM measures were correlated with workplace observer ratings to derive mean validity scores for each of the FFM items. A panel of judges then rated these items on the following item characteristics: ambiguity, abstractness, comprehensibility, wording, negation, transparency and social desirability. As hypothesized, social desirability, negation, wording and transparency were correlated with criterion-related validity. Contrary to the study hypothesis, abstractness was found to be positively correlated with criterion-related validity.
M.S. in Psychology, May 2015
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Title: MAXIMIZING THE ANTI-INFLAMMATORY EFFECTS OF STRAWBERRY ANTHOCYANINS: UNDERSTANDING THE INFLUENCE OF CONSUMPTION TIMING VARIABLE
Creator: Huang, Yancui
Date: 2015, 2015-05
Description: Chronic low-grade inflammation is an emerging risk factor for chronic disease development and complication. Strawberries, rich in anthocyanins...
Show moreChronic low-grade inflammation is an emerging risk factor for chronic disease development and complication. Strawberries, rich in anthocyanins, attenuate meal-induced postprandial increases in inflammation and oxidative stress as well as improved post-meal insulin responses. Anthocyanins are considered to be responsible in part, for their health benefits. The bioavailability of anthocyanins is low and short-lived. The relationship between strawberry intake timing of consumption relative to a meal and the metabolic-, inflammatory- and oxidative stress responses that ensue are not known. Therefore, this study aimed to determine if the strawberry consumption timing would influence meal-induced oxidative-immuno-metabolic outcomes. Fourteen overweight (BMI 26 ± 2 kg/m2) healthy adults (aged 25 ± 4 years) participated in a 3-arm, placebo-controlled, crossover clinical trial. Subjects came to the research clinical on 3 different occasions for 10 hours (h) and received 3 study drinks: 2 hours before a meal, with the meal, and 2 hours after the meal. A strawberry drink was given at 1 of the 3 time points and control drinks at the alternative time points. Plasma analytes of glucose, insulin and triglycerides were measured over the 10 h along with oxidized low density lipoprotein, a marker of oxidative damage, and interleukin-6, a marker of inflammation. Results were compared between strawberry “timing” groups and with a demographically matched reference group (n=10, BMI 27 ± 2 kg/m2and aged 27 ± 4 years) that was provided only control drinks (no strawberry). Study result showed a significant reduction in postprandial blood glucose when strawberry was consumed before the meal compared to having the strawberry drink with or after the meal, p < 0.05. Compared to the reference group, eating strawberries, regardless of the consumption time, attenuated postprandial blood glucose without additional insulin, suggesting improved sensitivity. Interleukin-6was significantly lower after consuming the strawberry drink before the meal (p=0.048) and modestly lower after consuming the strawberry drink with (p=0.116) or after the meal (p=0.098) compared to the reference group. This study provides data suggesting that strawberries have a role in glycemic control and attenuating the pro-inflammatory effect of a modern diet. There may be particular advantages when consumed before a meal.
M.S. in Food Safety and Technology, May 2015
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Title: Supersonic Jet Screech: Half-century from Powell to the Present
Creator: Raman, G.
Date: 1995-08-19
Publisher: Academic Press Ltd
Description: Under certain conditions, shock-containing jets produce an intense tone referred to as screech. Screech was discovered about half a century...
Show moreUnder certain conditions, shock-containing jets produce an intense tone referred to as screech. Screech was discovered about half a century ago by Alan Powell in England. Here I recount developments in supersonic jet screech - from Powell's first observation in 1951 to now. During this period more than 200 papers have been published - many offering only incremental advances. This paper provides a concise screech resource including a historical perspective, a summary of recent developments and a critical assessment of the state of the art. Topics include modulation of instability waves by shocks, shock-cell models and screech frequency prediction models, unsteady shock motions and clues about their role in shock noise generation. also. detailed nearfield measurements and computer simulation methods now available are discussed. However, despite the advances, screech amplitude prediction remains an elusive but increasingly important goal not only due to concerns about sonic fatigue failure of aircraft structures but because knowledge gained by the study of screech can be applied to a variety of resonant flow situations, including jet impingement, cavity resonance, and closed-loop active flow control. (C) 1999 Academic Press.
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Title: DEVELOPMENT OF A PROGRAMMABLE WIRELESS NETWORK TEST BED OVER ANDROID SMARTPHONE
Creator: Zhou, Chenyang
Date: 2016, 2016-05
Description: As wireless applications are increasingly prevalent in recent years, smartphones, the link between wireless world and common life, become more...
Show moreAs wireless applications are increasingly prevalent in recent years, smartphones, the link between wireless world and common life, become more and more indispensable. Subsequently, smartphone applets become more and more complicated, protocols like 3G,LTE,4G have also been improved to satisfy people’s increasing requirement. This leads to an exponentially increase in energy consumption. However, the power of smartphone battery is limited, and thus how to improve energy efficiency and extend the life-time of smartphone battery becomes a critical issue. In wireless local area networks (WLANs), switching to low-power sleep mode to save energy is common. Power-Saving mode (PSM) was one of the standard algorithm in order to save energy. This feature allows devices to switch the WiFi on and off several times a second. However, research papers have shown that PSM is not really efficient in practice, and in many cases (e.g. multiple stations), can actually degrade performance. This sleep-scheduling algorithm, derived from GreenCall Algorithm is demonstrated to have lower packets loss rate while achieving higher energy efficiency than that of the existing GreenCall Algorithm.
M.S. in Electrical Engineering, May 2016
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