Digital Commons Network^™

Expanding The Frontiers Of Directorship In Nigeria: Lessons From United Kingdom, India And South Africa, Goodtime Okara

School of Law, Humanities and Social Sciences

No abstract provided.

Exploiting Feedback Information In Cognitive Radio Systems, Sara Abozeid Attlla

Theses and Dissertations

In this thesis, we consider a cognitive radio (CR) network where the primary network's feedback information is utilized to design access schemes for the secondary network, to exploit the underutilized primary spectrum resources. Secondary users (SUs) identify the spectrum opportunities by sensing the spectrum for primary users (PUs) activities and by listening to the PUs feedback. The feedback signals monitored in this research work are the channel quality indicator (CQI) and automatic repeat request (ARQ) available in the PUs network. For detecting the PUs activities, SUs employ hard/soft energy sensing. The secondary access decisions are optimized to maximize the SUs …

Environmental Restoration Operations Consolidated Quarterly Report, January 2020, Sandia National Laboratories/Nm

Environmental Restoration

Environmental Restoration Operations Consolidated Quarterly Report, January 2020 for the Department of Energy Natural Nuclear Security Administration, Sandia National Laboratories that addressees all quarterly reporting (July to September 2019) required under the Hazardous and Solid Waste Amendments Module of the Resource Conservation and Recovery Act Permit and the Compliance Order on Consent for SNL/NM. EPA ID# NM5890110518

Preparation And Characterization Of Ceramic Nanofiltration Membrane Prepared From Hazardous Industrial Waste, Shereen Kamel Amin, Mai Hassan Roushdy, Heba Mohamed Abdallah, Ahmed Mostafa, Magdi Fouad Abadir

Chemical Engineering

Kiln rollers, which are widely used in ceramic tiles production, are usually subjected to surface grinding to remove the contaminations. The resulted fine powder is considered useless waste and a hazardous source of environmental pollution particularly as it contains health‐threatening fine free silica. In the present paper, the grind waste from kiln rollers was reused as raw material in the fabrication of nanofiltration cerramic membrane. The samples of produced ceramic membranes were formed into disks by adding 15% (by weight) organic binder solution with 2% concentration, then pressed at 35 MPa, dried and fired at temperatures range from 1100°C to …

Preparation Of Ceramic Membranes From Sludge Waste, Mai H. Roushdy

Chemical Engineering

Ceramic tiles industry produces industrial waste wit large amount which become a worldwide problem. Ceramic sludge produced from ceramic tiles wastewater treatment plant is routinely discarded as a useless waste. The aim of this paper is to recycle the ceramic sludge waste to be used as raw material for ceramic membrane production. The ceramic sludge was collected, dried, and characterized by mineralogical composition (XRD), thermal analysis (DTA and TGA), and chemical composition determination (XRF). The support ceramic membrane samples were formed, pressed, dried then fired using temperatures from 1050 to 1200 °C for 1 to 3 hours. Verification parameters were …

Development Of Novel Adsorbent For Industrial Waste Water Treatment, Hassaan M. Shehata, Dalia A. Ali, Islam M. Al-Akraa Dr, Hany A. Elazab, Hoda A. Elsawy Dr

Chemical Engineering

The main objective of this research project is to perform some experimental procedures to inform the ability of the novel adsorbent used in this project. The chemical modification of the adsorbent is the chemical oxidation of pure powder chitosan using some specific redox pairs which are potassium dichromate and sodium bisulphite. After preparing the modified chitosan, there are some parameters that must be discussed during the adsorption process. The first parameter is the time parameter, showing experimentally the optimum time for adsorption under certain conditions by collecting values of absorbance and concentration of thymol blue adsorbed after the process from …

Synthesis And Characterization Of Chitosan Based Catalyst For Catalysis Applications, Mostafa Radwan

Chemical Engineering

In this research, chitosan based catalyst synthesis and characterization was investigated for different application in catalysis as chitosan based catalyst was combined with metal oxides in order to be used in dye removal of methyl orange (MO). Diluted acetic acid was used to dissolve chitosan then different percentages for metallic ions were mixed with diluted chitosan and then, 500 μL were added to the sample to reduce the metal salts then, microwave was used to heat the mixture for 5 minutes and then dried at 80-100 °C. Finally, X- ray diffraction was used to confirm the catalyst prepared. The aim …

Tuning The Activity And Stability Of Platinum Nanoparticles Toward The Catalysis Of The Formic Acid Electrooxidation, Islam M. Al-Akraa, Bilquis A. Al-Qodami, Santosh Sridhar Mysore Dr, R. Viswanatha Dr, Abdul Kareem Thottoli, Ahmad M. Mohammad

Chemical Engineering

No abstract provided.

Repository Analytics And Metrics Portal (Ramp) Workflow Documentation And Data Definition, Jon Wheeler, Kenning Arlitsch

University Libraries & Learning Sciences Faculty and Staff Publications

The Repository Analytics & Metrics Portal (RAMP) is a web service that leverages Google Search Console (GSC) data to provide a set of baseline search engine performance metrics for a global, cross-platform group of institutional repositories (IR). Since launching in 2017, RAMP has grown from 3 to more than 50 participating repositories. The underlying data are unique in scope and size, and offer many opportunities for novel analyses of IR search engine performance. The data may be augmented to enable additional analyses including metadata mining and bibliometrics. In November 2019, the RAMP team released a publicly available subset of the …

Distributed Co-Mentoring As A Means To Develop Culturally Inclusive Online Learning Communities, Charlotte Nirmalani Gunawardena, Gayathri Jayatilleke, Geetha Kulasekara, Malinda Kumarasinha

University Libraries & Learning Sciences Faculty and Staff Publications

Transformative online pedagogies call for innovative ways of conceptualizing the online environment and the student, teacher, and peer relationships. In this paper, we focus on how distributed co-mentoring can scaffold both social and knowledge building processes to develop culturally inclusive online learning communities. We critique traditional mentoring relationships, which have often sustained a biased class structure exclusive of diverse populations. We conceptualize co-mentoring drawing from the perspectives of two alternative mentoring theories: (1) feminist postmodern values that bring women and minorities into educational networks, and (2) mentoring mosaic where a diverse range of individuals of different ranks, ages, genders, ethnicities, …

From Theory To Platform: Designing Software To Support Online Wisdom Communities, Casey Frechette, Charlotte Nirmalani Gunawardena, Ludmila Layne

University Libraries & Learning Sciences Faculty and Staff Publications

Online wisdom communities provide virtual spaces for diverse learners to discover collaborative solutions to real-world problems. Working for the common good, communities based on wisdom encourage both individual and collective growth. Based on sociocultural theory, we developed an instructional design framework, “WisCom,” that guides educators in cultivating culturally inclusive online environments, such as courses and web-based training sessions. Within the WisCom framework, practitioners can tailor existing tools and platforms, such as Moodle and Sakai, to encourage collaborative discussion and problem-solving. However, a platform created with the tenets of WisCom in mind has not yet been designed. Based on our previous …

Instructional And Institutional Planning Guide For Online And Blended Instruction, Stephanie L. Moore Phd

University Libraries & Learning Sciences Faculty and Staff Publications

This job aid is designed to support programs, universities, and schools in developing quality online learning and engage in online or blended program and institutional planning. Part 1 is a Planning Guide for Institution / District level planning. Part 2 is a worksheet for online and blended instructional design and planning. It includes sections on teamwork and collaboration online, interaction and engagement, materials, technology selection, assessment, and development and implementation checklists to facilitate the design and development process. Part 3 is a coordination guide to help align instructional and institutional planning. This is a companion to workshops where material is …

A Reduced Model For Microbial Electrolysis Cells, Dina Aboelela, Moustafa A. Soliman, Ibrahim Ashour

Chemical Engineering

Microbial electrolysis cells (MECs) are breakthrough technology of cheap hydrogen production with high efficiency. In this paper differential-algebraic equation (DAE) model of a MEC with an algebraic constraint on current was studied, simulated and validated by implementing the model on continuous-flow MECs. Then sensitivity analysis for the system was effectuated. Parameters which have the predominating influence on the current density and hydrogen production rate were defined. This sensitivity analysis was utilized in modeling and validation of the batch-cycle of MEC. After that parameters which have less influence on MEC were eliminated and simplified reduced model was obtained and validated. Finally, …

Ni-Au Anodic Nano-Electrocatalyst For Direct Glucose Fuel Cells, Islam M. Al-Akraa, Aya S. Abdulhalim Eng, Yassr M. Asal Mr, Ahmad M. Mohammad Prof

Chemical Engineering

This study aims at the sequential assembling of a nickel oxide (NiOx: cauliflower-like nanostructure, 90 nm) and gold (Au; spherical, 95 nm in an average particle size) onto the GC surface nanocatalyst on a glassy carbon (GC) electrode (will be abbreviated as Ni-Au/GC) for the glucose electro−oxidation (GO); the principal anodic reaction in the direct glucose fuel cells (DGFCs). The charge of the Ni deposition on the GC surface (will be abbreviated as Ni/GC electrode) was initially optimized to obtain the highest catalytic activity toward GO which attained at (339.8 Ag−1) by applying 15 mC in the Ni deposition. Yet, …

Enhanced Glucose Electrooxidation At Ni-Cu Binary Oxide Nanocatalyst, Islam M. Al-Akraa, Mahmoud M. Abouzaid Eng, Yaser M. Asal Mr, Ahmad M. Mohammad Prof

Chemical Engineering

The aim of this study is to fabricate a nickel (NiOx) and copper (CuOx) oxide nanocatalyst on a glassy carbon (GC) electrode (will be abbreviated as Ni-Cu/GC) for glucose oxidation (GO). A sequential electrodepositon mode was applied to assemble NiOx and CuOx in the fabrication scheme. The optimization of Ni loading on the GC surface (will be abbreviated as Ni/GC electrode) was achieved first to attain the maximum catalytic efficiency in terms of the specific current toward GO. This (409 Ag1)was obtained by applying 15 mC/cm2 in the deposition of Ni. However, unfortunately the NiOx/GC could not support a long-term …

Development Of Novel Adsorbent For Industrial Waste Water Treatment, Islam M. Al-Akraa, Hassan M. Shehata Eng, Dalia A. Ali Eng., Hoda A. Elsawy Dr

Chemical Engineering

The main objective of this research project is to perform some experimental procedures to inform the ability of the novel adsorbent used in this project. The chemical modification of the adsorbent is the chemical oxidation of pure powder chitosan using some specific redox pairs which are potassium dichromate and sodium bisulphite. After preparing the modified chitosan, there are some parameters that must be discussed during the adsorption process. The first parameter is the time parameter, showing experimentally the optimum time for adsorption under certain conditions by collecting values of absorbance and concentration of thymol blue adsorbed after the process from …

A Spin-Coated Tiox/Pt Nanolayered Anodic Catalyst For The Direct Formic Acid Fuel Cells, Islam M. Al-Akraa, Ahmad M. Mohammad Prof

Chemical Engineering

The CO poisoning of the platinum anodic catalyst which typically functions the catalytic deterioration of the direct formic acid fuel cells could be minimized with a simple modification for Pt with titanium oxide. The fabrication scheme involved the spin-coating of a Ti precursor onto a Pt thin layer that was physically sputtered onto a Si substrate. The whole assembly was subjected to a post-annealing processing to produce the TiOx layer (60 nm) in a porous structure (mostly Anatase) atop of the Pt surface. The porous nature of the TiOx layer permitted the participation of Pt in the electrocatalysis of the …

A Reduced Model For Microbial Fuel Cell, Dina Aboelela, Moustafa A. Soliman, Ibrahim Ashour

Chemical Engineering

Microbial fuel cells (MFCs) are a group of microbial electrochemical cells (bioreactors) that are used to generate energy from organic waste found in wastewater. MFCs represent a promising method of waste disposal and production of electricity. Scaling up the use of MFCs requires extensive analysis and detailed grasp of the required processes. The current work aimed to study a model of an MFC, and find the optimum parameters needed for maximum energy production. The process was simulated and validated on continuous-flow MFCs with a Columbic efficiency of 162% and 35% COD removal. Sensitivity analysis of the model was performed. The …

Crystal Gazing: Foretelling The Next Decade In Oil And Gas Law, Joseph A. Schremmer

Faculty Scholarship

This chapter attempts to predict the major issues oil and gas law will encounter in the 2020s. Yet even before the first draft could be completed, the industry landscape changed unexpectedly. As this chapter goes to press, the global and domestic economies are just starting to emerge from a sharp downturn brought on by the outbreak of COVID-19. Oil and natural gas prices collapsed to levels not seen in decades. Against this unforeseen backdrop, the legal changes facing oil and gas development in the United States look somewhat different. But one element of our new reality is consistent with this …

Open Government Data: Initiatives, Challenges, And Myths, Azeem Akbar, Abdul Jabbar Awan, Qurat Ul Ain Saleem Phd. Scholar, Nosheen Fatima Warriach

Library Philosophy and Practice (e-journal)

The study has been carried out to identify the open data initiatives taken by different governments. The study also incorporated the benefits and challenges and myths of open data applications. It is a qualitative study based on the review of already published literature. Literature was searched from scholarly databases by using multiple keywords. Articles were selected based on relevance to the topic. The UK, US, Maldova, Pakistan, and Fingal Country Catalog cases have been elaborated. The challenges include technical, legal, organizational, managerial, financial, methodological, and conceptual issues. The myths of open data include; 1) All information should be unrestrictedly publicized, …

Impact Of Digital Media On Information Needs And Seeking Behavior Of University Teachers In Pakistan, Gulnaz Akhtar

Library Philosophy and Practice (e-journal)

The core objective of this study was to examine the impact of digital media on information needs and seeking behavior of university teachers in Pakistan: A study of federal area universities. There are thirteen (13) federally chartered universities located in the federal capital, having faculties of applied/natural sciences, social sciences/humanities, and engineering covered by the study. With the insurrection of Information & Communication Technologies (ICTs) flow of information is rapidly enhanced. User needs are fulfilled through a single mouse click. Wide-ranging reading of volume of information is an additional dilemma. It is a reality that wide mountain range information creates …

Rent Seeking, Wealth Transfers And Water Rights: The Hawaii Case, Richard L. Bowen, James E. Moncur, Richard L. Pollock

Natural Resources Journal

No abstract provided.

Environmental Standards And International Trade In Automobiles And Copper: The Case For A Social Tariff, Duane Chapman

Natural Resources Journal

No abstract provided.

Legal And Administrative Uses Of Economic Paradigms: A Critique, Ronald G. Cummings

Natural Resources Journal

No abstract provided.

Water Resources Planning And Management In The United States Federal System: Long Term Assessment And Intergovernmental Issues, Leonard B. Dworsky, David J. Allee, Ronald M. North

Natural Resources Journal

No abstract provided.

The Uses Of The Practicably Irrigable Acreage Standard In The Quantification Of Reserved Water Rights, Martha C. Franks

Natural Resources Journal

No abstract provided.

Bibliometric Review On Classification Of Alzheimer’S Disease, Nishad Vyas, Keta Modi, Saanil Khanna, Chinmay Katpatal, Mrinal Bachute Dr

Library Philosophy and Practice (e-journal)

No abstract provided.

Use Of Web Resources And Services By The Research Scholars In The Field Of Social Sciences Of Selected Central Universities (Du, Bhu, Amu, Jnu), Utkarsh Dwiwedi, Rajani Mishra (Associate Professor)

Library Philosophy and Practice (e-journal)

The current study was conducted with the objective to study the usage of Web Resources and services by the Researchers in the field of social sciences of selected Central Universities (DU, BHU, AMU, JNU). A well-structured questionnaire was directed through irregular testing strategy to the Research Scholars of the Institutes to gather the information with respect to the utilization of Web Resources. This paper confines the investigation only to utilization of Web Resources by Researcher of Language and Literature in selected Central Universities (DU, BHU, AMU, JNU). The extent of the examination can be stretched out to former Indian Universities …

Airport Ceos And The Decentralized System Of Airports: A Case Study, Marjan Mazza

Publications

The job of the airport CEO is complex with responsibility for the security and safety of a large and dynamic facility and, yet the FAA does not have regulatory qualification and performance standards for the position. The purpose of this qualitative multi-case study was to explore the primary attributes that could be the leading indicators in the event national standards for the hiring of airport CEOs are pursued at major commercial airports. The guiding conceptual framework of the study was to combine competency with the concept of training and development. Airport CEOs from six airport facilities were interviewed, and an …

Examining Usability Of The Internet By The Teaching Staff Of The Peshawar Medical College, Muhammad Ibrahim, Abid Hussain, Sarah Saeed, Abdus Salaam

Library Philosophy and Practice (e-journal)

Purpose: This study aims to examine the access and purpose of internet use by the teaching staff of Peshawar Medical College, Peshawar.

Method(s)/Materials: Data were collected through a tested questionnaire from 115 teaching staff members of two major groups’ basic sciences and clinical sciences with a response rate (57.39%) of 66 members positively. Teaching faculty comprising 71.40% Male faulty members and 28.60% female took part in the study. Data were analyzed and tabulated using the SPSS tool.

Research Limitation(s): This study was limited to the teaching faculty of basic and clinical science departments of Peshawar Medical College Peshawar.

Key …