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Influence Of Atmospheric Clearness On Pdlc Switchable Glazing Transmission, Aritra Ghosh, Brian Norton, Tapas K. Mallick 2018 Dublin Institute of Technology

Influence Of Atmospheric Clearness On Pdlc Switchable Glazing Transmission, Aritra Ghosh, Brian Norton, Tapas K. Mallick

Articles

Electrically activated switchable polymer dispersed liquid crystal (PDLC) is suitable for adaptive windows. A particular type requires 20V to become 71% transparent while in the absence of power it is 27% transparent. Glazing transmission changes with light incident angle. As the clearness of a sky changes the fraction changes alter of direct insolation (that has an azimuthally changing incident) and diffuse insolation (that has a largely constant incident). Thus, the effective overall incident angle determining the glazing transmittance also changes. In this work for the first time, the variation of PDLC glazing transmission with clearness index has been investigated.


Fault Classification And Location Identification On Electrical Transmission Network Based On Machine Learning Methods, Vidya Venkatesh 2018 Virginia Commonwealth University

Fault Classification And Location Identification On Electrical Transmission Network Based On Machine Learning Methods, Vidya Venkatesh

Theses and Dissertations

Power transmission network is the most important link in the country’s energy system as they carry large amounts of power at high voltages from generators to substations. Modern power system is a complex network and requires high-speed, precise, and reliable protective system. Faults in power system are unavoidable and overhead transmission line faults are generally higher compare to other major components. They not only affect the reliability of the system but also cause widespread impact on the end users. Additionally, the complexity of protecting transmission line configurations increases with as the configurations get more complex. Therefore, prediction of faults ...


Life Is A Lab: Developing A Communication Research Lab For Undergraduate And Graduate Education, Autumn P. Edwards, Chad Edwards, Patric R. Spence 2018 Western Michigan University

Life Is A Lab: Developing A Communication Research Lab For Undergraduate And Graduate Education, Autumn P. Edwards, Chad Edwards, Patric R. Spence

Journal of Communication Pedagogy

Tips offered center on classroom discourse, curriculum choices, and potential assignments. In this article, we present tips for creating a thriving undergraduate and graduate communication research lab. Based on our experiences developing and co-directing the Communication and Social Robotics Labs (CSRLs), we offer 10 best practices for acquiring resources and recognition, building a strong lab community, and attaining faculty and student goals for scholarship and beyond. Our overarching approach is framed by Dewey’s (1916) pragmatist educational metaphysic, which stresses student- and subject-centered learning, enlarging experiences, and the co-construction of meaning and knowledge. Although our labs are focused on human-machine ...


Oil Spills Detection By Means Of Uas And Inexpensive Airborne Thermal Sensors, Ausama Al Shammari 2018 Michigan Technological University

Oil Spills Detection By Means Of Uas And Inexpensive Airborne Thermal Sensors, Ausama Al Shammari

Dissertations, Master's Theses and Master's Reports

This thesis provides an overview of oil spill scenarios and the remote sensing methods used for detection and mapping the spills. It also discusses the different kinds of thermal sensors used in oil spills detection. As UAS is becoming an important player in the oil and gas industry for the low operating costs involved, this research involved working with a cheap thermal airborne sensor mounted on DJI Phantom 4 system. Data was collected in two scenarios, first scenario is collecting data in Michigan’s Upper Peninsula at a petroleum company location and the second scenario was an indoor experiment simulating ...


Design And Evaluation Of Auditory-Supported Air Gesture Controls In Vehicles, Jason Sterkenburg 2018 Michigan Technological University

Design And Evaluation Of Auditory-Supported Air Gesture Controls In Vehicles, Jason Sterkenburg

Dissertations, Master's Theses and Master's Reports

The number of visual distraction-caused crashes highlights a need for non-visual information displays in vehicles. Auditory-supported air gesture controls could fill that need. This dissertation covers four experiments that aim to explore the design auditory-supported air gesture system and examine its real-world influence on driving performance. The first three experiments compared different prototype gesture control designs as participants used the systems in a driving simulator. The fourth experiment sought to answer more basic questions about how auditory displays influence performance in target acquisition tasks. Results from experiment 1 offered optimism for the potential of auditory-supported displays for navigating simple menus ...


Investigation Of The Convective Heat Transfer Coefficient Of The Hand And Fingers In Firefighter Gloves Using A Thermal Hand, Jie Yang, Li Wang, Weiwei Chen, Rui Li, Liwen Wang, Huanjiao Dong, Chunhui Xiang, AKM Mashud Alam, Guowen Song 2018 Iowa State University

Investigation Of The Convective Heat Transfer Coefficient Of The Hand And Fingers In Firefighter Gloves Using A Thermal Hand, Jie Yang, Li Wang, Weiwei Chen, Rui Li, Liwen Wang, Huanjiao Dong, Chunhui Xiang, Akm Mashud Alam, Guowen Song

International Textile and Apparel Association (ITAA) Annual Conference Proceedings

The heat transfer coefficients of the hands are critical inputs of the thermoregulation model that can simulate thermal responses of the hand and fingers. Besides, the hand has a greater surface area to mass ratio and complex anthropometric parameters, thus is extremely important in heat transfer and thermoregulation.

However, the convective heat transfer coefficients of the fingers, palm, and dorsal of the hand are not fully investigated and understood. Accordingly, there is an urgent need for full understanding of the convective heat transfer coefficients in both the whole-hand and regional segments. The results of this study will provide guidance for ...


Zipping Through Time: Extending The Life Of Children's Wear With Transformable Design, Michelle Park, Ja Young Hwang Ph.D., Haviet Huong, Shalia Johnson, Yahan Quing 2018 Kent State University

Zipping Through Time: Extending The Life Of Children's Wear With Transformable Design, Michelle Park, Ja Young Hwang Ph.D., Haviet Huong, Shalia Johnson, Yahan Quing

International Textile and Apparel Association (ITAA) Annual Conference Proceedings

This project is focused on addressing the problem of children outgrowing their garments too quickly. Designs focus on transforming garments to be used for multiple purposes, in particular a transformable waterproof baby carrier cover/ children's poncho and a size-changing dress. The designed garments were based on client needs, and longevity was approached by transforming both size and function. Size was addressed by using zippers, panels, and buttons; function was approached by selection of two items in the same category of use, i.e., as the child changes, so does the garment. The implementation of strategic expansion points effectively extends ...


Investigating The Effects Of Size On Glove Thermal Insulation Using A Thermal Hand, Weiwei Chen, Jie Yang, Li Wang, Rui Li, Chunhui Xiang, Huanjiao Dong, Liwen Wang, AKM Mashud Alam, Guowen Song 2018 Jiangsu College of Engineering and Technology

Investigating The Effects Of Size On Glove Thermal Insulation Using A Thermal Hand, Weiwei Chen, Jie Yang, Li Wang, Rui Li, Chunhui Xiang, Huanjiao Dong, Liwen Wang, Akm Mashud Alam, Guowen Song

International Textile and Apparel Association (ITAA) Annual Conference Proceedings

Thermal insulation for gloves has also been measured to assess comfort using thermal hands. However, the previous studies mainly focused on the thermal insulation among different types of gloves, rather than across different-sized gloves of the same type. Actually, the air gap thickness and volume between the skin of the hand and the gloves varies with the size of the gloves and on different locations on the hand, thereby affecting the heat and mass transfer between the skin and its thermal environment.

Consequently, different-sized gloves will affect the thermal responses of hand and fingers as well as the thermal comfort ...


Structural And Aerodynamic Design, Procedure And Analysis Of A Small V-Shaped Vertical Axis Wind Turbine, Odari J. Whyte 2018 Georgia Southern University

Structural And Aerodynamic Design, Procedure And Analysis Of A Small V-Shaped Vertical Axis Wind Turbine, Odari J. Whyte

Electronic Theses and Dissertations

Over the last two decades there has been a renewed interest in Vertical Axis Wind Turbines. This turbine configuration though unpopular for large-scale generation has found a niche market in the way of offshore energy harvesting. However, offshore wind has its challenges. In this thesis a detailed comprehensive study of a proposed V-shaped vertical axis turbine rotor is performed in order to examine its structural and aerodynamic characteristics. The design met and exceeded the safety parameters establish for test bed operation, showing a factor of safety of 1.87 with regard to fatigue stress response. A satisfactory fatigue stress design ...


Impact Of Owners’ Early Decisions On Project Performance And Dispute Occurrence In Public Highway Projects, Sogand Hasanzadeh, Behzad Esmaeili, Ghada M. Gad, Douglas D. Gransberg 2018 University of Nebraska - Lincoln

Impact Of Owners’ Early Decisions On Project Performance And Dispute Occurrence In Public Highway Projects, Sogand Hasanzadeh, Behzad Esmaeili, Ghada M. Gad, Douglas D. Gransberg

Architectural Engineering -- Faculty Publications

Disputes are common in the construction industry and lead to unnecessary cost and schedule overruns in projects. It is commonly believed that owners’ early decisions regarding the selection of delivery methods, procurement methods, and contract types impact the frequency and severity of project disputes; however, no previous study has empirically tested this hypothesis, particularly in highway public projects. Therefore, this study empirically investigated the impact of owners’ early decisions regarding project organization (i.e., delivery methods, procurement, and contract types) on performance measures (e.g., cost and schedule growth), specifically dispute performance metrics (e.g., frequency and severity of disputes ...


Simultaneous Electrical And Mechanical Resonance Drive For Large Signal Amplification Of Micro Resonators, M. H. Hasan, Fadi M. Alsaleem, N. Jaber, M. A. A. Hafiz, M. I. Younis 2018 University of Nebraska-Lincoln

Simultaneous Electrical And Mechanical Resonance Drive For Large Signal Amplification Of Micro Resonators, M. H. Hasan, Fadi M. Alsaleem, N. Jaber, M. A. A. Hafiz, M. I. Younis

Architectural Engineering -- Faculty Publications

Achieving large signal-noise ratio using low levels of excitation signal is key requirement for practical applications of micro and nano electromechanical resonators. In this work, we introduce the double electromechanical resonance drive concept to achieve an order-of-magnitude dynamic signal amplification in micro resonators. The concept relies on simultaneously activating the micro-resonator mechanical and electrical resonance frequencies. We report an input voltage amplification up to 15 times for a micro-resonator when its electrical resonance is tuned to match the mechanical resonance that leads to dynamic signal amplification in air (Quality factor enhancement). Furthermore, using a multi-frequency excitation technique, input voltage and ...


Utilizing Wearable Devices To Design Personal Thermal Comfort Model, Mostafa Rafaie, Mehari Tesfay, Fadi Alsaleem 2018 University of Nebraska - Lincoln

Utilizing Wearable Devices To Design Personal Thermal Comfort Model, Mostafa Rafaie, Mehari Tesfay, Fadi Alsaleem

Architectural Engineering -- Faculty Publications

have confirmed that thermal comfort significantly depends on internal personal parameters such as metabolic rate, age, and health status. This is manifested as a difference in comfort levels between people residing under the same roof, and hence no general comprehensive comfort model satisfying everyone. Current and newly emerging advancements in state of the art wearable technology have made it possible to continuously acquired biometric information. This work proposes to access and exploit this data to build personal thermal comfort model. Relying on various supervised machine-learning methods, a personal thermal comfort model will be produced and compared to a general model ...


Localized Indoor Temperature Estimation Using Smartphone And Laptop Internal Sensors, Mostafa Rafaie, Mehari Tesfay, Fadi Alsaleem 2018 University of Nebraska - Lincoln

Localized Indoor Temperature Estimation Using Smartphone And Laptop Internal Sensors, Mostafa Rafaie, Mehari Tesfay, Fadi Alsaleem

Architectural Engineering -- Faculty Publications

This paper investigates a mechanism in which indoor air temperature can be predicted using the temperature sensor on the battery and the CPU of smartphones or laptops, where data is easily accessible and ubiquitous. As a case study, several machine-learning methods were used to build models from a laptop data and the measured surrounding air temperature. The effects of the machine learning type and input feature size (by including other parameters such as CPU processing usage and battery charge percentage) on the model accuracy were investigated. The goal is to determine a set of feature combinations that can be used ...


Evaluation The Effect Of Washing On The Heat Transfer Capacity And Air-Side Flow Resistance Of Air Cooled Condensers, Mehdi Mehrabi, David Yuill 2018 University of Nebraska - Lincoln

Evaluation The Effect Of Washing On The Heat Transfer Capacity And Air-Side Flow Resistance Of Air Cooled Condensers, Mehdi Mehrabi, David Yuill

Architectural Engineering -- Faculty Publications

17th International Refrigeration and Air Conditioning Conference at Purdue, July 9-12, 2018


Numerical Simulation Of Fault Impacts For Commercial Walk-In Freezers, Alireza Behfar, David P. Yuill 2018 University of Nebraska - Lincoln

Numerical Simulation Of Fault Impacts For Commercial Walk-In Freezers, Alireza Behfar, David P. Yuill

Architectural Engineering -- Faculty Publications

Refrigeration systems can undergo many faults that could negatively affect their operation and performance. This paper describes a modeling process to simulate the fault impacts on the operation of a commercial walk-in freezer using semi-empirical models. These models often require less modeling effort than full forward models and could be used in scenarios where detailed information is missing, such as in field-measured systems. An important characteristic of a typical walk-in refrigeration system is the existence of a liquid-line receiver after the condenser, which significantly changes the behavior of the cycle, in comparison to a receiver-less system. Component models described in ...


Method For Radon Measurement In Residential Sewer Connections, David Yuill 2018 University of Nebraska-Lincoln

Method For Radon Measurement In Residential Sewer Connections, David Yuill

Architectural Engineering -- Faculty Publications

Radon gas is the most deadly indoor air pollutant. In the US, it is responsible for over 20,000 deaths per year. Residential exposure is typically the largest portion of a person’s annual exposure, so a great deal of research has been done to understand the pathways that radon can follow to enter a house. Since radon emanates from the ground, it is present in high concentration in soil gas. Recent research on the vapor intrusion of volatile organic compounds from subsurface sources into a test house concluded that the sewer line is an important preferential pathway. Despite the ...


Comfort-Based Optimal Temperature Setpoint Calculation, Andrew Holthaus, Mostafa Rafaie, Fadi Alsaleem 2018 University of Nebraska - Lincoln

Comfort-Based Optimal Temperature Setpoint Calculation, Andrew Holthaus, Mostafa Rafaie, Fadi Alsaleem

Architectural Engineering -- Faculty Publications

General practice in current building HVAC control is to select building temperature setpoints that comply with ASHRAE Standard 55. By meeting this standard, based on the PMV comfort model, 80% of building occupants should be satisfied with their thermal environment. However, unfortunately, this is rarely the case. One possible reason for this is the variation in occupant activity and clothing that are usually assumed default values using this standard. In this work, we present an iterative-based algorithm to solve this problem. The algorithm solves the PMV inverse model equation to determine the optimal temperature setpoint while inferring human activity level ...


Investigating The Effluent Of Aluminum Acetate As A Pre-Mordant On Cotton Print Cloth, Kowshik Saha, Sarif Ullah Patwary, Sherry Haar 2018 Kansas State University

Investigating The Effluent Of Aluminum Acetate As A Pre-Mordant On Cotton Print Cloth, Kowshik Saha, Sarif Ullah Patwary, Sherry Haar

International Textile and Apparel Association (ITAA) Annual Conference Proceedings

Pretreated cotton print cloths were mordanted with aluminum acetate at five concentrations (0.0, 2.5, 5.0, 7.5, and 10% owf). Inductively coupled plasma mass spectrometry (ICP-MS) technology was used to determine the aluminum present in the mordant liquor and clothes. The amount of aluminum absorbed by the cotton print cloth, regardless of mordant concentration, was low (2.31 -5.16%) compared to the amount of aluminum (158.9 "“ 36.6 mg) in the control solution. The results of this study suggest that the aluminum acetate mordant treatment bath for samples retains most of the metals while the ...


Different Impacts Of Boot Height And Air Bottles On The Mobility Of Tall And Short Firefighters, Huiju Park, Rumit Singh Kakar, Jie Pei, Hyunji Lee, Joshua Tome, International Personnel Protection Inc 2018 Cornell University

Different Impacts Of Boot Height And Air Bottles On The Mobility Of Tall And Short Firefighters, Huiju Park, Rumit Singh Kakar, Jie Pei, Hyunji Lee, Joshua Tome, International Personnel Protection Inc

International Textile and Apparel Association (ITAA) Annual Conference Proceedings

This study conducted biomechanical tests with 21 firefighters and found that there is a significant correlation between boot height and lower body mobility, and that using a fixed boot height mandated by NFPA 1971 standard decreased lower body ranges of motion during various firefighters' job-related tasks. Statistical analysis of large anthropometric data also shows a fixed boot height cannot accommodate a wide range of firefighters' leg length. These findings indicate that shorter firefighters are likely to have limited lower body mobility due to reduced clearance between the knee and top of the boot, and thus decreased space causing greater mechanical ...


Creating Garment Simulations: Effectiveness Of Traditional Textile Testing Equipment Versus Kes And Fast Systems, Evrim Buyukaslan, Fatma Baytar, Fatma Kalaoglu 2018 Istanbul Technical University

Creating Garment Simulations: Effectiveness Of Traditional Textile Testing Equipment Versus Kes And Fast Systems, Evrim Buyukaslan, Fatma Baytar, Fatma Kalaoglu

International Textile and Apparel Association (ITAA) Annual Conference Proceedings

3D virtual garment simulation software packages offer various fabric alternatives in their fabric libraries. However, these libraries are limited in terms of providing their users with particular fabric compositions, structures, and drape properties. When a specific fabric needs to be used for a garment simulation to understand how the end-product would look like, individual fabric mechanical properties must be entered into the software. For this purpose, usually fabric mechanical values measured by either KES or FAST systems are used. Although these systems provide precise measurements, they are very expensive to obtain. Our research questions emerged from the need to use ...


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