Digital Commons Network^™

Titanium Interconnection In Metallized Carbon Nanotube Conductors, Dylan J. Mcintyre

Theses

Metallized carbon nanotube (CNT) networks aim to achieve conductivities competitive with bulk metals, while retaining the favorable temperature coefficient of resistance (TCR) for CNT materials. Cu is the predominant metal for high conductivity applications due to cost and availability. However, microscopy shows that Cu poorly wets a CNT surface and requires an adhesion metal for an improved physical and electrical interface. The present dissertation utilizes thermal evaporation as a direct method to evaluate 2-D coatings of Ti as an interfacial metal for bulk Cu-CNT hybrids. Specifically, a 10 nm Ti layer maintained a continuous and uniform coating after annealing to …

Simple Energy Balance Or Microbiome For Childhood Obesity Prevention?, Tom Baranowski, Kathleen J Motil

Children’s Nutrition Research Center Staff Publications

Obesity prevention interventions generally have either not worked or had effects inadequate to mitigate the problem. They have been predicated on the simple energy balance model, which has been severely questioned by biological scientists. Numerous other etiological mechanisms have been proposed, including the intestinal microbiome, which has been related to childhood obesity in numerous ways. Public health research is needed in regard to diet and the microbiome, which hopefully will lead to effective child obesity prevention.

Electronic Information Sources (Eis) Preferences By Faculty Members Of The Private Sector Universities In Peshawar, Pakistan, Muhammad Ismail, Amjid Khan, Abid Hussain

Library Philosophy and Practice (e-journal)

Worldwide, faculty members mostly use EIS for teaching, learning, research, and professional development. Though, evidence is lacking to address the EIS preferences among the academicians of private sector universities in the study context. To fill this gap, using a convenient sample technique, a survey was conducted, and a structured questionnaire was used as a data collection tool from 630 permanent faculty members of private sector universities at Khyber Pakhtunkhwa. A total of 360 questionnaires were administrated, and 250 useable responses were received with a response rate of 69.44%. The major findings revealed that 38% of respondents were lecturers followed by …

Contents Evaluation Of University Libraries Website In Nigeria, Chuks Daniel Oriogu

Library Philosophy and Practice (e-journal)

Purpose:The study focused on the contents evaluation of university library websites in Northern, Nigeria.

Design/methodology/approach:This study adopted analytical survey method to collect data from the fourteen private university libraries websites.

Research limitation(s): Public (State and Federal)Universities are not part of the study.

Key finding(s):The result revealed that most of the private university libraries in Northern part of Nigeria have not enriched the content of their library websites. And a good number of the libraries websites are poorly designed and outdated.

Practical implication(s): The findings of the study has made it possible for university libraries to understand their …

The Underrepresentation Of Minoritized Groups In Stem Education, Kate Neally

Theses and Dissertations

The current school system lacks racial representation among science, technology, engineering, and mathematics (STEM) teachers, particularly in Black and Latinx populations (National Science Foundation, 2019). This is a critical equity issue due to the increasing racial diversity of the student population and the benefits of race congruence among teachers and students. Using a Critical Race Theory framework, this mixed-methods study explores the underrepresentation of minoritized groups in STEM education. Original surveys and interviews were used to understand the experiences of Black and Latinx STEM majors. The purpose of this study is (1) to better understand the Students of Color’s (SOC) …

Review Of Comparing Cultures And Religions In A Postmodern World, Januarius J. Asongu

The Journal of Social Encounters

No abstract provided.

Revision And Quality Analysis Of Library And Information Science Concepts In Wikipedia, Chaitali Ghosh, Prof. Udayan Bhattacharya

Library Philosophy and Practice (e-journal)

Wikipedia is public encyclopedia contains articles on different subjects and different topics. The objective of the study is to evaluate the standard and status of revision of the library related articles. History page of Wikipedia article contains statistics of page from where the status and standard of the page has been derived. It has been concluded that Wikipedia covers 67 concepts of DDC 23^rd edition arrived in 020 class (Library and Information Science Class). The content of Library and Information Science (LIS) related articles in Wikipedia was not enough informative as per Wikiproject. The concepts related to information science …

A Study Of Information Literacy Competency Among Undergraduate Students At Mzumbe University In Morogoro Municipality, Tanzania, Andrew Malekani, Sifuni Mhomisoli Ms

Library Philosophy and Practice (e-journal)

A study was undertaken to examine undergraduate students’ skills in Information literacy among at Mzumbe University in Morogoro Municipality, Tanzania. The objective of this study was to investigate the information literacy levels among undergraduate students. Specifically, the study sought to find out how undergraduate students identify their information needs, to examine how undergraduate students evaluate the retrieved information and to find out how undergraduate students cite and reference information sources. The study used a mixed method approach design using cross-sectional and case study. The study distributed 210 questionnaires to undergraduate students using stratified sampling followed by systematic random sampling to …

A Bibliometric Analysis Of Research Output, Citation Analysis, Author Productivity, Collaborations, And Institutions Of Repute In Smartphone Health Applications (Sphealth Apps)., Dwight Figueiredo, Milind Chunkhare

Library Philosophy and Practice (e-journal)

Due to rapid smartphone health application growth and usage, we analyzed literature published in the field of spHealth Apps. SciVerse Scopus was used as the database of choice for this study. Research productivity, collaborations, citation analysis, authors and institutions were presented using well established bibliometric indicators.

During the study period (2000-20), 4546 documents were published in total. The average count of documents per year was 227. English was the language predominantly used in the retrieved documents (97%). The h- index of the retrieved documents was 137. Author submission of keywords used in documents pertaining to sp- Health Apps included human, …

Caldag-Gefi Mediates Striatal Cholinergic Modulation Of Dendritic Excitability, Synaptic Plasticity And Psychomotor Behaviors., Jill R. Crittenden, Shenyu Zhai, Magdalena Sauvage, Takashi Kitsukawa, Eric Burguière, Morgane Thomsen, Hui Zhang, Cinzia Costa, Giuseppina Martella, Veronica Ghiglieri, Barbara Picconi, Karen A. Pescatore, Ellen M. Unterwald, Walker S. Jackson, David E. Housman, S. Barak Caine, David Sulzer, Paolo Calabresi, Anne C. Smith, D. James Surmeier, Ann M. Graybiel

Department of Neuroscience Faculty Papers

CalDAG-GEFI (CDGI) is a protein highly enriched in the striatum, particularly in the principal spiny projection neurons (SPNs). CDGI is strongly down-regulated in two hyperkinetic conditions related to striatal dysfunction: Huntington's disease and levodopa-induced dyskinesia in Parkinson's disease. We demonstrate that genetic deletion of CDGI in mice disrupts dendritic, but not somatic, M1 muscarinic receptors (M1Rs) signaling in indirect pathway SPNs. Loss of CDGI reduced temporal integration of excitatory postsynaptic potentials at dendritic glutamatergic synapses and impaired the induction of activity-dependent long-term potentiation. CDGI deletion selectively increased psychostimulant-induced repetitive behaviors, disrupted sequence learning, and eliminated M1R blockade of cocaine self-administration. …

Effects Of Covid-19 On Global Research In Stem, Michelle Hoang, Santanu De

Biology Faculty Articles

A global public health emergency like the Coronavirus Infectious Disease 2019 (COVID-19) pandemic requires accurate and timely data collection in the research community. High impact research in science, technology, engineering, and mathematics (STEM) has been prioritized in the fight against COVID-19. The present study investigated the impact of COVID-19 on STEM research and the collaboration between global research institutions and industries. It was noted that COVID-19 had caused significant delays in non-COVID-19-related research projects and the onset of several remote studies. Most importantly, researchers in the STEM fields directed their attention and expertise to help mitigate virus transmission, treat patients, …

Case Study Of An Automated Mower To Support Airport Sustainability, Sarah Hubbard, Adam Baxmeyer, Bryan Hubbard

Aviation Technology Faculty and Staff Publications

This paper documents a case study of an automated mower to support sustainability at an airport. Mowing is an essential component of an airport’s Wildlife Hazard Management Plan (WHMP), which reduces the risk of birds and other wildlife to aircraft operations. Many airports have large areas of land (hundreds or even thousands of acres), which requires significant resources to manage and mow; experience at the Purdue Airport (KLAF) suggests that automated mowing may support economic and environmental aspects of sustainability. Automated mowing supports economic efficiency by reducing personnel requirements, although personnel are still needed for inspections, maintenance, and “mower rescue” …

Real-Time Obscurant Quantification In Long-Wave Infrared Imaging, Bryan Andrew Underwood

Electronic Theses and Dissertations Archive

LWIR imaging in military applications is often plagued by dust degraded visuals while deployed in the field. The vast majority of current dust enhancement systems correct degradation through the application of algorithms applied to an entire frame. This method of applying the algorithm to the entire frame makes the implementation simple but does have a few negatives. For example, global application of the algorithm inherently enhances clear sections of an image as well as the dust occluded regions. This often produces unwanted artifacts and could possibly result in false targeting. This thesis proposes to address those unwanted effects through a …

The Influence Of Herbivory On Macrophyte Community Structure And Nitrogen Retention In Created Wetlands, Evan Squier

Theses

Wetlands are frequently created to mitigate the loss of natural wetlands due to commercial expansion. However, wetland ecosystem function is determined by complex abiotic and biotic interactions that are not well understood in natural wetlands, and even less so in created wetlands. This lack of understanding may lead to shortcomings in meeting desired restoration outcomes. Key abiotic drivers in wetlands include hydrology and nutrient availability, while herbivory provides both direct and indirect controls on plant communities and biogeochemical cycling. I hypothesized that by decreasing emergent plant biomass and shifting plant community structure to favor submerged plants, large grazers such as …

Comparative Dna Degradation Automation For Identifinders, Jennifer Pfaff

Theses

The degradation of DNA in forensic genetic genealogy can hinder timely results in victim or perpetrator identification. Identification of an unidentified victim, a “Doe”, involves analyzing the degraded DNA against reference genomes. Organizations like the DNA Doe Project and Identifinders currently manually compares the genomes in a spreadsheet with data input slowing down the investigative process. I propose a program to automate the data input and comparison to increase the speed at which Identifinders can continue their research into identifying victims. Comparative DNA Degradation Automation (CDDA) automates the process of creating a simulated degraded DNA profile in less than a …

Sequentially Adaptive Differential Pulse Code Modulation Using Adaptive Lsp Filters., Fayez Zaki

Mansoura Engineering Journal

The advantages of coding speech signal digitally are well known and are widely discussed in the literature [1]. Briefly, digital representation offers efficient signal regeneration, noise immunity, easy encryption, the possibility of combining transmission and switching functions, and the advantage of a uniform frmat for different types of signals. Unfortunately, these benefits are gained at the expense of increased transmission bandwidth. The redundancy removal systems (e.g., differential coding, linear prediction vocoders,…etc.) were developed to overcome this difficulty,, although, of the expense of system complexity and speech quality. This paper introduces a simple adaptive differential pulse code modulation (ADPCM) system for …

The Importance Of Phase In Biological Signals., Fatma Abou-Chadi

Mansoura Engineering Journal

In this paper, the important of phase in the context of biological signals is highlightened. Techniques for manipulating the phase spectral values prior to its use are illustrated and several approaches to exploit the role of phase statistics in biological signal analysis and feature extraction are discussed.

Performance Characteristics Of A Slotted-Cage Solid Rotor Three-Phase Induction Motor With Constant-Voltage Source (Experimental Investigation)., A. Amin, M. El-Shammoty, S. El-Drieny

Mansoura Engineering Journal

The performance characteristics of a new form of a solid rotor, three-phase induction motor has been investigated. For this purpose, three differently slotted rotors were designed, and successively examined in the rotating field of a 36-statorslots. These rotors having noslot, 32-slot, and 40-slot. Comparing the performance of these rotors with and without cage winding, brought out clearly the influence of the various parameters that affect the performance of a slotted-cage induction motors. These parameters are the slot width, the slot depth, the slot numbers, and the saturation of the magnetic material. It is noticed that the performance characteristics for a …

Hardware Implementation Of Continuously Variable Slope Adaptive Delta Modulator., Fayez Zaki

Mansoura Engineering Journal

Adaptive Delta Modulation (ADM) coding is economical method of digitally encoding speech signals. It is a one-bit differential coding scheme which compares the source signal x(t) to an approximate signal xˆ(t) which is then increased or increased by a predetermined step size. This step size is adapted in proportion to the recent average slew rate of the input signal. For a given average signal slope, there is an optimum step size which will result in the maximum signal-to-quantisation noise ratio (SNR) q , and it is desirable to adapt accordingly. In this paper, design and implementation of the continuously variable …

An Adaptive Identification Algorithm For Electro-Mechanical Systems., Fayez Areed

Mansoura Engineering Journal

In the present paper a study on the sensitivity functions in electro-mechanical systems is introduced. This study takes into account the effect of parameters variation of the controlled plant. Also, the effect of the unmeasurable disturbance are studied. The possibility of identifying the unstationary parameters of an electro-mechanical system is viewed, using the suitable adaptive control law. A new algorithm for designing an adaptive observer is introduced. The designed observer insures the possibility of evaluating the transfer co-efficient of the controlled electro-mechanical plant, under the effect of unmeasurable disturbances on the load side. The suggested adaptive observer helps in stabilizing …

Dynamic Characteristics Of Industrial Robots, Using Segmented Trajectories., F. Areed

Mansoura Engineering Journal

Robotic systems represent one of the most advanced industrial applications. Such robotic systems have a severe oscillatory behavior, thus the conventional control techniques are not suitable to deal with it. In the present paper, the dynamic dynamic behavior of robotic systems is studied and a dynamic model for such systems is obtained. A suitable trajectory for each link is pre-determined. The technique introduced proposes a segmented trajectory rather than a continuous one. A comparative study between the behaviour of the system with the proposed technique and that proposed in [7] is introduced. The above mentioned algorithm assumed that the chosen …

Power System Planning In Developing Countries - The Case Of Jordan., Hafez El-Zayyat, Zainel-Abideen Tahboub, Fawwaz El-Karmi

Mansoura Engineering Journal

This paper deals with power system planning in developing countries. Several features of power system planning in developing countries are presented. These show that the planning process varies with the degree of assimilation of technology by society in general, and by planners and decision makers in particular, as well as the degree of economic growth, sound economic management, adoption of appropriate policies and degree of social development. The problems encountered by power system planners in developing countries are discussed in the first part of the paper. The second part is allotted to a detailed description of the Jordanian case as …

Cost Of Electricity Outage In Jordan., F. Elkarmi, H. El-Zayyat, Z. Tahboub

Mansoura Engineering Journal

Electric power system reliability is a very important aspect for both producers and consumers. For the former it is important to design an optimally reliable system while for the latter it is important for the economic use of electricity for production and services. Combining the two sides one sets the importance indicator for determining optimum reliability level is the cost of outage to consumers. The authors in this paper present an estimation for the cost of outage using three methodologies. The overall average cost of outage is estimated at JD 0.63/kwh (U.S.S I/kwh) while the specific outage costs are: JD …

A Classifing Bibliography On Computer Operating Systems., Mofreh Salem

Mansoura Engineering Journal

This paper is essentially a get of references to further reading for the entire operating system topics. The selected references are representative of studied dealing with computer operating systems. The references are subgrouped into due to use categories.

On Line Algorithm For Line Overload Alleviation., K. Yassin, E. Abd-Raboh, E. Towfik

Mansoura Engineering Journal

This paper presents an algorithm to be used in an energy control center to alleviate transmission lines overloads, either by line switching or busbar splitting. The method is applied to the 220 kv network of northern Egypt power system. The results achived proves the efficiency of such algorithm. Moreover, a comparison is carried out between the proposed algorithm in this paper and the generation shift approach.

Computer Control In Power Systems., E. Abd-Raboh, A. Ibrahim

Mansoura Engineering Journal

This paper is concerned with the new applications of on line/off line computers in modern power systems. In this paper, computer control from the power stations to the substation and transmission is extended. A new technique using a new topology description is developed. This technique has the facilities of describing topology connections, states, proparties as well as the optimal process of power stations. A program is constructed and used for performing the system interlocking. The Egyptian 500kv substation is checked by the proposed technique and its prospective program. The on-line interlocking is found to have less computation time than the …

Output Feedback Stabilization Of Discrete Systems., Hisham Soliman

Mansoura Engineering Journal

An algorithm is presented to solve the problem of stabilizing linear time invariant dincrete systems using output feedback. The algorithm is based on transforming the problem into a functional, a derived sufficient condition for stability, to be minimized using nonlinear optimization techniques. An illustrative example is given to support theoretical investigations.

Design Of A Robust Electro-Mechanical Control System., Sabry Saraya, Fayez Areed

Mansoura Engineering Journal

No abstract provided.

Converging-Diverging Duct Heat Transfer And Hydrodynamic Resistance For Turbulent Water Flow., M. Awad, M. Shalaby, S. El-Shazly

Mansoura Engineering Journal

No abstract provided.

Condensation Heat Transfer Considering Actual Film Surface., Mohamed Mahgoub

Mansoura Engineering Journal

This paper is concerned with the investigation of the effect of the nature of the surface of the condensate film on heat transfer during laminar film condensation. An idealized rippled nature of the film surface is proposed. Local heat transfer coefficients are calculated for film condensation on a vertical plate in laminarcase. Calculations are performed numerically. For the proposed rippled nature of the film surface, the average heat transfer coefficients are up to 20% higher than that obtained for smooth condensate surface.