Digital Commons Network^™

Modulation Schemes And Connectivity In Wireless Underground Channel, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

In this chapter, a thorough treatment of the modulation schemes for UG Wireless is presented. The effects of soil texture and water content on the capacity of multi-carrier modulation in WUC are discussed. The multi-carrier capacity model results are analyzed. Moreover, the underground MIMO design for underground communications is explained thoroughly. An analysis of medium access in wireless underground is done as well. Furthermore, the soil properties are considered for cross-layer communications of UG wireless. The performance analysis of traditional modulation schemes is also considered. The soil moisture-based modulation approach is also explored in this chapter. The connectivity and diversity …

Underground Phased Arrays And Beamforming Applications, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

This chapter presents a framework for adaptive beamforming in underground communication. The wireless propagation is thoroughly analyzed to develop a model using the soil moisture as an input parameter to provide feedback mechanism while enhancing the system performance. The working of array element in the soil is analyzed. Moreover, the effect of soil texture and soil moisture on the resonant frequency and return loss is studied in detail. The wave refraction from the soil–air interface highly degrades the performance of the system. Furthermore, to beam steering is done to achieve high gain for lateral component improving the UG communication. The …

Current Advances In Internet Of Underground Things, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

The latest developments in Internet of Underground Things are covered in this chapter. First, the IOUT Architecture is discussed followed by the explanation of the challenges being faced in this paradigm. Moreover, a comprehensive coverage of the different IOUT components is presented that includes communications, sensing, and system integration with the cloud. An in-depth coverage of the applications of the IOUT in various disciplines is also surveyed. These applications include areas such as decision agriculture, pipeline monitoring, border control, and oil wells.

Electromagnetic Characteristics Of The Soil, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

The electromagnetic characteristics of the soil are discussed in this chapter. The characteristics of porous bedrock, soil medium, and impacts of rain attenuations are also presented. The models of dielectric soil properties are studied with a rigorous focus on the constitutive parameters of subsurface soil medium. Moreover, the permittivity and wavenumber in soil are explained. In addition, the frequency-dependent dielectric properties such as dispersion in soil, absorption characteristic, and penetration depth versus frequency are reviewed. Furthermore, the effective permittivity of soil–water mixture for through-the soil-propagation mechanism is analyzed thoroughly.

Signals In The Soil: Subsurface Sensing, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

In this chapter, novel subsurface soil sensing approaches are presented for monitoring and real-time decision support system applications. The methods, materials, and operational feasibility aspects of soil sensors are explored. The soil sensing techniques covered in this chapter include aerial sensing, in-situ, proximal sensing, and remote sensing. The underlying mechanism used for sensing is also examined as well. The sensor selection and calibration techniques are described in detail. The chapter concludes with discussion of soil sensing challenges.

Soil Moisture And Permittivity Estimation, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

The soil moisture and permittivity estimation is vital for the success of the variable rate approaches in the field of the decision agriculture. In this chapter, the development of a novel permittivity estimation and soil moisture sensing approach is presented. The empirical setup and experimental methodology for the power delay measurements used in model are introduced. Moreover, the performance analysis is explained that includes the model validation and error analysis. The transfer functions are reported as well for soil moisture and permittivity estimation. Furthermore, the potential applications of the developed approach in different disciplines are also examined.

Autonomous Irrigation Management In Decision Agriculture, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

In this chapter, the important application of autonomous irrigation management in the field decision agriculture is discussed. The different types of sensor-guided irrigation systems are presented that includes center pivot systems and drip irrigation systems. Their sensing and actuator components are with detailed focus on real-time decision-making and integration to the cloud. This chapter also presents irrigation control systems which takes, as an input, soil moisture and temperature from IOUT and weather data from Internet and communicate with center pivot based irrigation systems. Moreover, the system architecture is explored where development of the nodes including sensing and actuators is presented. …

Decision Agriculture, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

In this chapter, the latest developments in the field of decision agriculture are discussed. The practice of management zones in digital agriculture is described for efficient and smart faming. Accordingly, the methodology for delineating management zones is presented. Modeling of decision support systems is explained along with discussion of the issues and challenges in this area. Moreover, the precision agriculture technology is also considered. Moreover, the chapter surveys the state of the decision agriculture technologies in the countries such as Bulgaria, Denmark, France, Israel, Malaysia, Pakistan, United Kingdom, Ukraine, and Sweden. Finally, different field factors such as GPS accuracy and …

Variable Rate Applications In Decision Agriculture, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

In this chapter, the variable rate applications (VRA) are presented for the field of decision agriculture. The characteristics of VRA control systems are described along with control hardware. Different types of VRA systems are discussed (e.g., liquid VRA systems and dry VRA systems). A case study is also explored in this regard. Moreover, recent advances and future trends are also outlined. Accordingly, a sustainable variable-rate irrigation scheduling is studied where different hardware and software component of the cyber-physical system are considered. Finally, chapter is concluded with a novel sensor deployment methodology.

Signals In The Soil: Underground Antennas, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

Antenna is a major design component of Internet of Underground Things (IOUT) communication system. The use of antenna, in IOUT, differs from traditional communication in that it is buried in the soil. Therefore, one of the main challenges, in IOUT applications, is to establish a reliable communication. To that end, there is a need of designing an underground-specific antenna. Three major factors that can impact the performance of a buried antenna are: (1) effect of high soil permittivity changes the wavelength of EM waves, (2) variations in soil moisture with time affecting the permittivity of the soil, and (3) difference …

Wireless Underground Channel Modeling, Abdul Salam, Usman Raza

Computer Information Technology Faculty Publications

A comprehensive treatment of wireless underground channel modeling is presented in this chapter. The impacts of the soil on bandwidth and path loss are analyzed. A mechanism for the UG channel sounding and multipath characteristics analysis is discussed. Moreover, novel time-domain impulse response model for WUC is reviewed with the explanation of model parameters and statistics. Furthermore, different types of the through-the-soil wireless communications are surveyed. Finally, the chapter concludes with discussion of the UG wireless statistical model and path loss model for through-the-soil wireless communications in decision agriculture. The model presented in this chapter is also validated with empirical …

Interactional Research Into Problem-Based Learning, Susan M. Bridges, Rintaro Imafuku

Purdue University Press Books

Problem-based learning (PBL) has been deployed as a student-centered instructional approach and curriculum design in a wide range of academic fields across the world. The majority of educational research to date has focused on knowledge-based outcomes addressing why PBL is useful. Researchers of PBL are developing a growing interest in qualitative research with a process-driven orientation to examining learning interactions. It is essential to broaden this research base so as to support PBL designs and approaches to leading students into higher-order thinking and a deeper approach to learning.

Interactional Research Into Problem-Based Learning explores how students learn in an inquiry-led …

Examining The Factor Structure Of The Home Mathematics Environment To Delineate Its Role In Predicting Preschool Numeracy, Mathematical Language, And Spatial Skills, David J. Purpura, Yemimah A. King, Emily Rolan, Caroline Byrd Hornburg, Sara A. Schmitt, Sara A. Hart, Colleen M. Ganley

Purdue University Libraries Open Access Publishing Fund

A growing body of evidence suggests that the ways in which parents and preschool children interact in terms of home-based mathematics activities (i.e., the home mathematics environment; HME) is related to children’s mathematics development (e.g., primarily numeracy skills and spatial skills); however, this body of evidence is mixed with some research supporting the relation and others finding null effects. Importantly, few studies have explicitly examined the factor structure of the HME and contrasted multiple hypothesized models. To develop more precise models of how the HME supports children’s mathematics development, the structure of the HME needs to be examined and linked …

Construct-Specific And Timing-Specific Aspects Of The Home Environment For Children’S School Readiness, Yemimah A. King, Robert Duncan, German Posada, David J. Purpura

Purdue Center for Early Learning Faculty and Staff Publications

Prior evidence supports that the home environment is related to children’s development of school readiness skills. However, it remains unclear how construct- and timing-specific aspects of the home environment are related to children’s school readiness skills, unique from overall, stable aspects of home quality. Unpacking associations due to specific constructs and timing of the home environment may provide insights on the theoretical processes that connect the home environment to school readiness. Using data from the NICHD Study of Early Child Care and Youth Development (N = 1,364), the current study examines how timing (36 and 54 months) and constructs …

Fourier, Marx, And Social Reproduction, Blanca Missé

CLCWeb: Comparative Literature and Culture

This article establishes a conversation between the work of materialist socialist Charles Fourier and Marxist social reproduction theory (SRT). SRT has laid the ground to explore who produces the producer, in order to analyze and integrate the role of reproductive labor into a comprehensive Marxist view of the capitalist economy. In the context of the critical re-appraisal of the labor of social reproduction, Fourier offers a key materialist perspective which is also present in Marx: the identity between labor and desire in the socialist project. Fourier's materialism, I show, greatly influenced both Marx and Engels, for whom labor was also …

Investigation Of The Split In The Fundamental Air-Cavity Mode Of Loaded Tires, Won Hong Choi, J Stuart Bolton

Publications of the Ray W. Herrick Laboratories

It is well known that a tire’s fundamental air-cavity mode, typically near 200 Hz for current passenger car tires, can split into two adjacent features when a tire is loaded and hence deformed, thus creating a fore-aft, horizontal mode and a vertical mode. This split happens because the deformed tires is no longer geometrically symmetric: the air channel in the bottom region of the tire is narrowed, hence effectively increasing the inertia in that region, and thus causing the fore-aft mode, which has a relatively large particle velocity in the bottom part of the tire, to have a lower natural …

Look At The Moon Rather Than The Finger, Yeomin Yoon

KAUPA Letters

No abstract provided.

Development And Application Of Dual Form Conic Formulation Of Multichannel Active Noise Control Filter Design Problem In Frequency Domain, Yongjie Zhuang, Yangfan Liu

Publications of the Ray W. Herrick Laboratories

Active noise control filter design methods can be categorized as time-domain or frequency-domain methods. When multiple frequency-dependent constraints need to be specified, such as the enhancement constraint, stability constraint, and robustness constraint, the optimal filter coefficients can be obtained more conveniently by solving a constrained optimization problem formulated using frequency-domain methods. However, the computational load for searching the global optimal solution is significantly high, if the number of channels, filter coefficients, or constraints is large. To improve computational efficiency, some previous work relaxed the traditional formulation to a convex problem, and then reformulated it to a cone programming problem. After …

Interactional Research Into Problem-Based Learning, Susan M. Bridges, Rintaro Imafuku

Purdue University Press Book Previews

Problem-based learning (PBL) has been deployed as a student-centered instructional approach and curriculum design in a wide range of academic fields across the world. The majority of educational research to date has focused on knowledge-based outcomes addressing why PBL is useful. Researchers of PBL are developing a growing interest in qualitative research with a process-driven orientation to examining learning interactions. It is essential to broaden this research base so as to support PBL designs and approaches to leading students into higher-order thinking and a deeper approach to learning.

Interactional Research Into Problem-Based Learning explores how students learn in an inquiry-led …

An Empirical Exploration Of Southeast Asian-Americans In Education Research: A Qualitative Meta-Analysis, Peter T. Keo

Journal of Southeast Asian American Education and Advancement

This research examined how Southeast Asian-Americans are treated in leading K-12 and higher education research. A qualitative meta-analysis was conducted using secondary data sources. I analyzed 1,192 pages of text from 151 peer-reviewed academic articles in six K-12 and higher education journals. In a span of 10 years (2007-2016), only four of the 151 articles (2.6%) reviewed specifically addressed in whole or in part Southeast Asian-Americans – one of the most disadvantaged ethnic minority groups in America. Findings demonstrated that aggregating racial data for Asian-Americans silences under-represented Southeast Asian-Americans, suggesting that the continued fight for racial equality in educational research …

Who Is Welcome Here? A Culturally Responsive Content Analysis Of Makerspace Websites, Hannah Kye

Journal of Pre-College Engineering Education Research (J-PEER)

Makerspaces and maker education are widely seen as means to democratize science and engineering education. A small but growing body of scholarly work warns against this assumption and calls for an explicit focus on equity in makerspaces both online and in person. With an understanding of learning as a social and cultural process, this paper proposes that disrupting the cycle of racial and cultural inequity in science education requires makerspace educators and staff to ground their work in multicultural theories and practices. In particular, culturally responsive pedagogy (CRP) provides guidance for infusing science and engineering with equity approaches in order …

A Data‐Driven Framework To Characterize State‐Level Water Use In The U.S., E Wongso, Roshanak Nateghi, Benjamin Zaitchik, Steven Quiring, Rohini Kumar

School of Industrial Engineering Faculty Publications

Access to credible estimates of water-use are critical for making optimal operational de-15 cisions and investment plans to ensure reliable and affordable provisioning of water. Fur-16 thermore, identifying the key predictors of water use is important for regulators to pro-17 mote sustainable development policies to reduce water use. In this paper, we propose18 a data-driven framework, grounded in statistical learning theory, to develop a rigorously19 evaluated predictive model of state-level, per capita water use in the US as a function20 of various geographic, climatic and socioeconomic variables. Specifically, we compare the21 accuracy of various statistical methods in predicting the state-level, …

Factorial Validity Of The Flight Risk Assessment Tool In General Aviation Operations, Chenyu Huang, Allen Xie, Flavio A.C. Mendonca

Journal of Aviation Technology and Engineering

The Flight Risk Assessment Tool (FRAT) was developed and is recommended by the Federal Aviation Administration to provide a solution of proactively identifying and mitigating risk before each flight. General aviation (GA) operators are encouraged to adapt the FRAT based upon specific operational characteristics. Currently, most safety management systems-compliant GA operators have implemented various versions of FRATs with different operational purposes. However, the FRAT could be inappropriately implemented because of the dynamic operational features of GA operations. The purpose of this study is to explore insights into potential approaches to validate the FRAT that is used for flight risk assessment …

Purdue Mission To Mars 2.0: A Learn-By-Doing Approach To Recruiting, Rustin Webster, Matthew Turner

School of Engineering Technology Faculty Publications

In the summer of 2018, a prior award winning and effective learn-by-doing recruiting event for Purdue Polytechnic New Albany (PPNA) was revamped since its inception in 2015 and delivered to 28 secondary education students. The authors’ internal, emotional drive to improve the recruiting event and host such a complex, dynamic, and hands-on engineering design and robotics experience again, was in hopes that students would be inspired to choose technology-related majors and apply to PPNA. The purpose of this descriptive nonexperimental study is to investigate the actual impact Purdue Mission to Mars (PMTM) 2.0 had on the students’ self-reported interest in …

Literature Review: How U.S. Government Documents Are Addressing The Increasing National Security Implications Of Artificial Intelligence, Bert Chapman

Libraries Faculty and Staff Scholarship and Research

This article emphasizes the increasing importance of artificial intelligence (AI) in military and national security policy making. It seeks to inform interested individuals about the proliferation of publicly accessible U.S. government and military literature on this multifaceted topic. An additional objective of this endeavor is encouraging greater public awareness of and participation in emerging public policy debate on AI's moral and national security implications..

Comparison Of Pre-Intervention Idi Results From Stem And Non-Stem Undergraduate Students, Anne M. Lucietto, Lisa Russell

School of Engineering Technology Faculty Publications

The emphasis on intercultural competence is more prevalent in STEM (Science, Technology, Engineering and Mathematics) majors as the world shifts towards a more globalized economy. When entering higher education, students have differing levels of cultural interaction due to varying peer interaction, family experiences, international travel, and social media experiences. The Intercultural Development Inventory (IDI) has been used to develop an understanding of how students view others and the level of skills they have to interact and adapt to other cultures. Using published data focused on pre-intervention assessment, researchers compared it to data obtained from STEM students preparing for an international …

Math Anxiety: Engineering Technology Students Problem Solving Through Rational Or Experiential Context, Anne M. Lucietto, Meher Rusi Taleyarkhan, Natalie Hobson, Therese M. Azevedo

School of Engineering Technology Faculty Publications

Math anxiety is a pernicious problem. The issue manifests in a variety of ways, some avoid math completely, while others enact coping skills to avoid the use of math. This study surveys students who are pursuing Engineering Technology degrees and delves into the tendencies of the students and how they utilize certain types of problem-solving techniques. The survey utilized the instrument Cognitive-Experiential Self Theory (CEST) [1]. The survey will help to learn the extent to which the students rely on the rational and experiential context of their lives to answer technical questions. The study is intended to enlighten educators and …

Math Anxiety In Female And Underrepresented Minority Students A Literature Review, Anne M. Lucietto, Meher Rusi Taleyarkhan, Therese M. Azevedo, Natalie Hobson

School of Engineering Technology Faculty Publications

Educators have noticed that some students respond to exercises requiring mathematical calculations with numerical answers that are not correct and far from realistic. These student solutions are often given without further comment or calculation by the students and seem to such avoidance by the students to engage with the numerical calculations. Anecdotal evidence, by these educators, suggest that such responses are more prevalent from female and underrepresented minority groups — raising the question of whether demographics play a role in a students’ approach to numerical problems. Researchers have searched for existing work in this area and find that there are …

Simulating Quantum Systems Using The D-Wave Quantum Computer, Justin M. Copenhaver, Raunaq Kumaran, Birgit Kaufmann, Adam Wasserman

Discovery Undergraduate Interdisciplinary Research Internship

No abstract provided.

Congressional Committee Resources On Space Policy During The 115th Congress (2017-2018): Providing Context And Insight Into Us Government Space Policy, Bert Chapman

Libraries Faculty and Staff Presentations

Article 1 of the US Constitution assigns the US Congress numerous responsibilities. These include creating new laws, revising existing laws, funding government programs, and conducting oversight of these programs' performance. Oversight of US Government agency space policy programs is executed by various congressional space policy committees including the House and Senate Science Committees, Armed Services, and Appropriations Committees. These committees conduct many public hearings on space policy, which invite expert witnesses to testify on US space policy programs and feature debate on the strengths and weaknesses of these programs. Documentation produced by these committees is widely available to the public, …