Digital Commons Network^™

Chemical Kinetic Investigation: Exploring The Impact Of Various Concentrations Of Hho Gas With A 40% Biodiesel/Diesel Blend On Hcci Combustion, Mai H. Aboubakr, Medhat Elkelawy Prof. Dr, Eng., Hagar Alm-Eldin Bastawissi, Ayman Refat Abd Elbar

Journal of Engineering Research

This study uses the Chemkin software program to evaluate the effect of different quantities of oxyhydrogen gas [HHO] added to 40% biodiesel and diesel mix [B40], including B40, B40+5HHO, B40+10HHO, and B40+15HHO, on the HCCI combustion process's efficiency. The information collected includes cylinder pressure, cylinder temperature, accumulated gas phase heat release, heat loss rate, UHC, and mole fractions of O2, CO, CO2, diesel [NC7H16], biodiesel [C5H10O2], and oxyhydrogen [H2O]. The finding is that, when compared to a blend of biodiesel and diesel, using oxyhydrogen in the biodiesel/diesel mix boosts the properties of the HCCI engine.

Exploring The Influence Of Various Factors, Including Initial Temperatures, Equivalence Ratios, And Different Biodiesel/Diesel Blend Ratios, On Homogeneous Charge Compression Ignition (Hcci) Combustion, Mai H. Aboubakr, Medhat Elkelawy Prof. Dr, Eng., Hagar Alm-Eldin Bastawissi, Ayman Refat Abd Elbar

Journal of Engineering Research

This paper discusses the impact of three study cases that change with different values: the first case is four initial temperature values [313, 323, 333, and 343 K], the second case is three equivalence ratios [0.2, 0.3, and 0.4], and the third case uses various concentrations of biodiesel and diesel mixes [D100, B20, B40, B60, B80, and B100]. The purpose is to use the Chemkin software program to determine the effectiveness of each case in the HCCI combustion process. The results included cylinder pressure, cylinder temperature, accumulated gas phase heat release, heat loss rate, UHC, and mole fractions of O …

Survey And Analysis Of Safety Components And Costs In Construction Projects In Egypt, Emad E. Etman Prof., Haytham Sanad Prof., Asmaa Ibrahim Khater

Journal of Engineering Research

The difficulty of determining the factors that achieve safety on Egyptian construction sites as a result of multiple and different criteria and different relative weights of the criteria represents a challenge to achieve safety and a secure environment on construction sites. This issue has been of interest for many decades and continues to be a topic of discussion today because of construction project management is rapidly modernizing. The paper aims to identify the safety standards most commonly used on construction sites, and determine their relative weights as seen by the target audience and also estimate the cost of safety measures …

Multi-Classification Model For Brain Tumor Early Prediction Based On Deep Learning Techniques, Abdelrahman T. Elgohr, Mohamed S. Elhadidy, Mahmoud Elazab Dr, Raneem Ahmed Hegazii, Moataz M. El Sherbiny

Journal of Engineering Research

Brain tumor early prediction is a critical task in medical imaging, as early detection and classification of tumors can significantly improve patient outcomes and treatment planning. In this study, we propose multi-classification models based on deep learning techniques for early prediction of brain tumors using magnetic resonance imaging (MRI) scans. Specifically, we investigate the effectiveness of Convolutional Neural Networks (CNN) in the You Only Look Once (YOLO) approach for an accurate classification of brain tumors into multiple classes based on their morphological characteristics. The proposed model is designed to extract spatial features from MRI images, capturing local patterns and structures …

Enhancing Decision In Information System Through Weighted Preliminary Pretopology Analysis, Mustafa Elsayed, Rifet Agassi

Journal of Engineering Research

It is clear from adequate study of the past decades that there has been rapid growth in the information system, which relies mainly on programming systems. This has led to the necessity of dealing with high efficiency with the information system necessary for decision support. Information systems are a mixture of software and hardware to store and process all the data required and are presented in a useful form to extract information by applying topological concepts. In this paper a pretopological space from an information system is to be constructed. The computation of decision accuracy stands as a pivotal stage …

تحسين كفاءه التوازن الحرارى لمستخدمى الفراغات السكنيه, Alamera Kamal Elden Elfeky, Elamira Elfeky, Walaa Ahmed Nour, Lobna Abdallah Agha

Journal of Engineering Research

human belonging to nature Considered innate, and known as Biophilie, it has direct and strong relation with human heath and his welfare which affected by quality of internal environment where we Live and work as we spend most of our time in this environment. Biophelic design Aim to improve heath and welfare of human. natural. and reconnect him with his natural environment beside achieving the aesthetic aspect of his place.

in our present time, gap appeared in relation between human and environment as a result of modern design solution, as it has negative effect on human heath and safety, to …

Shoreline Barriers May Amplify Coastal Groundwater Hazards With Sea-Level Rise, Xin Su, K. M. Befus, Michelle A. Hummel

Geosciences Faculty Publications and Presentations

Subsurface barriers have been proposed to protect coastal aquifers from sea-level rise induced seawater intrusion, but the potential for groundwater emergence near subsurface barriers remains unknown. Here, we investigated how emergence changes groundwater flow conditions and influences the protective performance of subsurface barriers with sea-level rise. We tested the subterranean consequences of sea-level rise for cutoff walls and subsurface dams with cross-shore groundwater flow and salt transport models, investigating how barrier design, aquifer properties, and hydrological conditions control the potential for emergence, groundwater partitioning at the barrier, and seawater intrusion with sea-level rise. We find that most subsurface infrastructure cannot …

Design Of Long-Distance Entanglement Distribution Protocols For Quantum Networks, Stav Haldar

LSU Doctoral Dissertations

Future quantum technologies such as quantum communication, quantum sensing, and distributed quantum computation, will rely on networks of shared entanglement between spatially separated nodes. Distributing entanglement between these nodes, especially over long distances, currently remains a challenge, due to limitations resulting from the fragility of quantum systems, such as photon losses, non-ideal measurements, and quantum memories with short coherence times. In the absence of full-scale fault-tolerant quantum error correction, which can in principle overcome these limitations, we should understand the extent to which we can circumvent these limitations. In this work, we provide improved protocols and policies for entanglement distribution …

Feynman–Kac Perturbation Of C* Quantum Stochastic Flows, Alexander C.R. Belton, Stephen J. Wills

School of Engineering, Computing and Mathematics

The method of Feynman–Kac perturbation of quantum stochastic processes has a long pedigree, with the theory usually developed within the framework of processes on von Neumann algebras. In this work, the theory of operator spaces is exploited to enable a broadening of the scope to flows on C^∗ algebras. Although the hypotheses that need to be verified in this general setting may seem numerous, we provide auxiliary results that enable this to be simplified in many of the cases which arise in practice. A wide variety of examples is provided by way of illustration.

Myth Or Fact? An Analysis Of Covid-19 Deaths In Red Or Blue States Of America, Kwabena S. Duku, Nishat Ara Mozid, Olcay Akman

Spora: A Journal of Biomathematics

This study examines the correlation between political leanings and COVID-19 mortality across the states of America affiliated with Republican and Democratic governance. Employing emergent self-organizing map (ESOM), cluster analysis, and the logistic classification, we group states based on COVID-19 properties, identify risk patterns, and assess risk levels. Factors considered include poverty rate, education rate, vaccination rate, and demographics. The Logistic Algorithm succinctly summarizes findings, integrating ESOM, cluster analysis, and logistic classification results. This multi-method approach aims to offer a concise, yet comprehensive understanding of the COVID-19 risk landscape in politically diverse states, shedding light on potential associations between political affiliations …

Pengembangan Buku Ajar Digital Geografi Sma Berplatform Aplikasi 3d Page Flip Dengan Pendekatan Steam (Science, Technology, Engineering, Art, Mathematic) Materi Keragaman Budaya Di Indonesia, Yuli Yana, Budi Handoyo, Alfyananda Kurnia Putra

Jurnal Pendidikan Geografi: Kajian, Teori, dan Praktek dalam Bidang Pendidikan dan Ilmu Geografi

Dewasa ini peserta didik hidup di era digital. Kondisi yang demikian berpengaruh terhadap perubahan kebutuhan buku ajar sebagai sumber belajar bagi peserta didik. Tujuan penelitian pengembangan ini menghasilkan buku ajar digital berplatform aplikasi 3D page flip dengan pendekatan STEAM (Science, Technology, Engineering, Art, Mathematic) materi keragaman budaya di Indonesia. Rancangan penelitian ini menggunakan model ADDIE. Hasil uji coba produk menunjukkan bahwa persentase tingkat kelayakan buku ajar sebanyak 87 persen yang artinya sangat layak digunakan. Sedangkan hasil tes pemahaman peserta didik memperoleh nilai pada rentang 76-85 dengan persentase sebanyak 53 persen. Hasil tersebut menunjukan bahwa peserta didik memiliki kriteria tingkat pemahaman …

Faktor-Faktor Kesiapsiagaan Bencana Terintegrasi Pengetahuan Prekursor Gempa Bumi Pada Mahasiswa Pendidikan Ipa, Muhyiatul Fadilah, Enok Maryani, Riandi Riandi, Anna Permanasari

Jurnal Pendidikan Geografi: Kajian, Teori, dan Praktek dalam Bidang Pendidikan dan Ilmu Geografi

Kesiapsiagaan merupakan kompetensi utama yang harus dimiliki oleh masyarakat rawan bencana, termasuk pada mahasiswa. Kesiapsiagaan dibangun oleh pengetahuan. Penelitian terdahulu menunjukkan level kesiapsiagaan mahasiswa sangat bervariasi, namun belum terdapat penjelasan tentang hubungan pengetahuan dan faktor-faktor lain yang memengaruhi kesiapsiagaan mahasiswa. Selain itu, pengukuran kesiapsiagaan belum mengkaji komponen penanda bencana atau prekursor. Penelitian ini dilakukan untuk mendeskripsikan faktor-faktor yang berhubungan dengan level kesiapsiagaan mahasiswa. Populasi penelitian adalah mahasiwa pendidikan IPA dan penentuan sampel penelitian dilakukan secara purposive, sehingga sebanyak 104 mahasiwa pendidikan IPA yang mengambil matakuliah IPBA ditetapkan sebagai sampel. Penelitian merupakan penelitian deksriptif. Pengumpulan data dilakukan melalui angket kesiapsiagaan TPPG …

Environmental Awareness And Pro-Environmental Behavior: A Case Of University Students In Malang City, Ramadhani Lausi Mkumbachi, I Komang Astina, Budi Handoyo

Jurnal Pendidikan Geografi: Kajian, Teori, dan Praktek dalam Bidang Pendidikan dan Ilmu Geografi

Mahasiswa menunjukkan komitmen yang rendah terhadap perilaku prolingkungan meskipun mereka tahu banyak tentang masalah lingkungan. Tujuan dari penelitian ini adalah (1) untuk mengetahui tingkat kesadaran lingkungan dan perilaku pro-lingkungan dan (2) untuk menemukan hubungan antara kesadaran lingkungan dan perilaku pro-lingkungan di kalangan mahasiswa di Kota Malang. Penelitian ini menggunakan desain penelitian kuantitatif deskriptif dengan menggunakan metode survei. Data dikumpulkan dengan menggunakan instrumen kuesioner menggunakan 3 poin yang dimodifikasi dari skala respons Liker. Hasil penelitian menunjukkan bahwa mayoritas siswa memiliki kesadaran lingkungan yang lebih tinggi dan menunjukkan perilaku ramah lingkungan yang tinggi.

Numerical Simulations Suggest Asteroids (101955) Bennu And (162173) Ryugu Are Likely Second Or Later Generation Rubble Piles., K J Walsh, R-L Ballouz, W F Bottke, C Avdellidou, Harold Connolly Jr., M Delbo, D N Dellagiustina, E R Jawin, T Mccoy, P Michel, T Morota, M C Nolan, S R Schwartz, S Sugita, D S Lauretta

School of Earth & Environment Departmental Research

Rubble pile asteroids are widely understood to be composed of reaccumulated debris following a catastrophic collision between asteroids in the main asteroid belt, where each disruption can make a family of new asteroids. Near-Earth asteroids Ryugu and Bennu have been linked to collisional families in the main asteroid belt, but surface age analyses of each asteroid suggest these bodies are substantially younger than their putative families. Here we show, through a coupled collisional and dynamical evolution of members of these families, that neither asteroid was likely to have been created at the same time as the original family breakups, but …

The Green Bank 820 Mhz Pulsar Survey. I. Survey Overview And Initial Results, A. E. Mcewen, R. S. Lynch, D. L. Kaplan, C. Bolda, R. Sengar, E. Fonseca, T. Agoudemos, J. Boyles, S. Chatterjee, T. Cohen, F. Crawford, M. E. Decesar, A. Ehlke, T. Fernandez, E. C. Ferrara, W. Fiore, N. Gilhaus, M. Gleiter, J. W.T. Hessels, T. Holman, A. Joy

Pacific Faculty Work

The Green Bank 820 MHz pulsar survey covers ≃173 deg² in the Cygnus X region of the Galaxy, centered on l = 84.°5 and b = 1.°5. Significant star formation is present in this region, and lines of sight pass through three arms of the Galaxy (Orion-Cygnus, Perseus, and an outer arm). Using the Green Bank Telescope, we recorded 200 MHz of bandwidth for 4.5 minutes at 81.92 μs resolution for each of 3457 observed survey pointings during 2016 and 2017, covering about two-thirds of the total area. We searched these data for pulsars and report the discovery of …

Unpacking The Science Of Reading Research, Greta Rollo, Kellie Picker

Literacy and numeracy

The science of reading (SoR) is a term used for a body of evidence encompassing multi-disciplinary research from education, cognitive psychology, linguistics, and neuroscience. This evidence points to six key constructs that contribute to proficient reading: oral language, phonological awareness including phonemic awareness, phonics, fluency, vocabulary and reading comprehension. Research around these constructs provides researchers and teachers with an evidence base of the knowledge, skills and strategies involved in competent reading and describes how reading develops in both typical and atypical readers. This paper synthesises evidence reviews conducted by ACER researchers that unpack the science of reading. The aim of …

Investigation Of Various Mimo Antenna For 5g Mobile Phone Applications, Rajesh Kumar D

Theses and Dissertations

The rapid progress of wireless communication systems has been driven by the persistent demand for higher data rates, improved connectivity, and seamless user experiences. The introduction of fifth-generation (5G) wireless technology introduces fresh challenges and possibilities within the domain of antenna design, particularly concerning Multiple-Input Multiple-Output (MIMO) systems operating in the sub-6 GHz frequency range. This thesis conducts a comprehensive exploration and conceptualization of MIMO antennas expressly crafted for smooth integration into mobile phones, with a particular emphasis on addressing the distinctive requisites of sub-6 GHz 5G communication.

The proposed antenna designs effectively harnesses the advantages inherent in multiple-input multiple-output …

Associations Between Total, Free And Bioavailable 25-Hydroxyvitamin D Forms With Adiponectin And Irisin In Maternal-Neonatal Pairs At Birth From Greece, Tarek Ziad Arabi, Hana M.A. Fakhoury, Hani Tamim, Rene F. Chun, Martin Hewison, Fatme Alanouti, Stefan Pilz, Cedric Annweiler, Georgios Tzimagiorgis, Costas Haitoglou, Spyridon N. Karras

All Works

Background: Apart from the well-established skeletal effects, vitamin D has been explored as a secretagogue influencing various adipokines, including adiponectin and irisin. Recent evidence suggests that specific forms of 25-Hydroxyvitamin D (25(OHD), such as free and bioavailable 25(OH)D, may provide more accurate measurements of vitamin D status. The relationship between vitamin D status and serum irisin and adiponectin concentrations remains largely unexplored, particularly during pregnancy. Methods: We analyzed data from 67 healthy maternal-neonatal pairs from Northern Greece at birth. Biochemical and hormonal tests were conducted on each maternal-neonatal pair. The vitamin D forms were estimated using validated mathematical models. Subsequently, …

Dnaforge: A Design Tool For Nucleic Acid Wireframe Nanostructures, Antti Elonen, Leon Wimbes, Abdulmelik Mohammed, Pekka Orponen

Faculty Research, Scholarly, and Creative Activity

DNAforge is an online tool that provides a unified, user-friendly interface to several recent design methods for DNA and RNA wireframe nanostructures, with the possibility of integrating additional methods into the same framework. Currently, DNAforge supports three design methods for DNA nanostructures and two for RNA nanostructures. The tool enables the design, visualisation and sequence generation for highly complex wireframe nanostructures with a simple fully automated process. DNAforge is freely accessible at https://dnaforge.org/.

Sustainability Considerations For End-Of-Life Fibre-Reinforced Plastic Boats, John Summerscales

School of Engineering, Computing and Mathematics

No abstract provided.

Life Cycle Assessment: A Fundamental Tool In Advancing Environmental Sustainability, Badr Moutik, John Summerscales, Jasper Graham-Jones, Richard Pemberton

School of Engineering, Computing and Mathematics

No abstract provided.

Spatial-Problem Based Learning (Spbl) Development (Preliminary Studies For Geography Learning), Waode Yunia Silviariza, Budi Handoyo

Jurnal Pendidikan Geografi: Kajian, Teori, dan Praktek dalam Bidang Pendidikan dan Ilmu Geografi

Problem Based Learning (PBL) is one of the scientific learning models that is widely used by teachers to educate students about the subjects they teach. PBL is widely developed and applied in all fields of multidisciplinary science. Therefore, PBL in learning geography needs to be developed to fit the main characteristics of geography, namely the spatial approach. In geography learning, the Spatial Based Learning (SBL) model is often used. SBL is a model that can encourage students to think in space. Therefore, integrating PBL and SBL will create a new learning model that is more in line with the characteristics …

The Local Wisdom And Land Use Of Paddy Field In Sukarame Village, Cisolok Sub-District, Sukabumi Regency, Astrid Damayanti, Alisya Zhafira Hafiz, Aninda Ainun Mi’Raj, Muhammad Refiansyach Dwiyanto, Ravidania Auni

Jurnal Pendidikan Geografi: Kajian, Teori, dan Praktek dalam Bidang Pendidikan dan Ilmu Geografi

Local wisdom is an understanding of a culture that has been inherited in a place from generation to generation by word-of-mouth. Indonesia, which still adheres to agriculture, always involves local wisdom in the use of their lands. Land-use is a visualization of the earth's surface cover, which results in a various earth formation, both natural and human-made. In the Village of Sukarame, there was a representative of Kasepuhan, which came from the Banten Kidul indigenous community, namely Kasepuhan Ciptagelar. This community still adheres to the traditional farming methods until now. The purpose of this study was to determine the relationship …

Pendidikan Kesiapsiagaan Bencana Tanah Longsor Untuk Siswa Anak Usia Dini Dengan Metode Dongeng Berbasis Media Pop Up Book Di Paud Dewi Sartika Kecamatan Bergas, Andi Irwan Benardi

Jurnal Pendidikan Geografi: Kajian, Teori, dan Praktek dalam Bidang Pendidikan dan Ilmu Geografi

Penelitian ini bertujuan untuk mendesain dan menyusun naskah dongeng tentang kesiapsiagaan bencana tanah longsor, mendesain dan membuat pop up book tentang kesiapsiagaan bencana tanah longsor, dan mengetahui tingkat efektivitas metode mendongeng dengan media Pop Up book dalam pendidikan kesiapsiagan bencana tanah longsor. Metode penelitian yang digunakan adalah metode eksperimen. Pengambilan sampel dilakukan dengan teknik purposive sampling pada kelas rendah, sedangkan pengumpulan data dalam penelitian ini melalui observasi, wawancara dan kuesioner. Teknik analisis yang digunakan adalah analisis deskriptif dan analisis N-Gain. Hasil penelitian menunjukkan desain dan susunan naskah dongeng sesuai untuk anak usia PAUD Dewi Sartika Kecamatan Bergas. Desain dan pembuatan …

Sri Hayagriva Stotra An In Depth Analysis, Vasudevan V

Theses and Dissertations

ŚRĪ HAYAGRĪVA is a benevolent avatar of Śrī Mahāviṣnu. He is worshiped as the God of knowledge and wisdom. He is an eternal avatar of Śrī Mahāviṣnu and there have been many studies on him done in the past by eminent scholars all over the world. Swāmi Śrī Deśika is a Sri Vaiṣṇava Acharya who has written many philosophical as well as religious and poetical works in several languages including Sanskrit, Manipravālam, Tamil, and Prākṛt. Svāmi Vedānta Deśika received the grace of Śrī Hayagrīva and was blessed with knowledge and wisdom. He then composed ŚRĪ HAYAGRĪVA STOTRA with thirty-three stanzas …

Study On Factors Influencing The Strong Chromatic Index Of Graphs Derived From Path Graphs, Star Graphs, And Cycle Graphs, Vikram St

Theses and Dissertations

Graph coloring is a major research area in Graph Theory that has a rich collection of research articles contributed by mathematicians across the world. This thesis focuses on a specific type of Graph coloring where the edges of a graph are colored by a principle called strong edge-coloring. There have been numerous research articles published on the least number of colors required to define such a coloring for a given graph G. This least number, χ′s (G), is called as the strong chromatic index of a graph G. Though conjectures stated as early as 1989 remain unsolved, there have been …

Internal Structure Of Incipient Soot From Acetylene Pyrolysis Obtained Via Molecular Dynamics Simulations, Khaled Mosharraf Mukut, Anindya Ganguly, Eirini Goudeli, Georgios Kelesidis, Somesh P. Roy

Mechanical Engineering Faculty Research and Publications

A series of reactive molecular dynamics simulations is used to study the internal structure of incipient soot particles obtained from acetylene pyrolysis. The simulations were performed using the ReaxFF potential at four different temperatures. The resulting soot particles are cataloged and analyzed to obtain statistics of their mass, volume, density, C/H ratio, number of cyclic structures, and other features. A total of 3324 incipient soot particles were analyzed in this study. Based on their structural characteristics, the incipient soot particles are classified into two classes, termed type 1 and type 2 incipient soot particles in this work. The radial distribution …

A Wrong Made Right: A Qualitative Cross-Case Comparison Study Examining Program Influences On College Readiness, Persistence, And Student Success Outcomes At A Predominantly White University And Historically Black College, Richard Harper

Theses and Dissertations

The increase of underprepared students entering college decreases persistence and graduation rates at postsecondary institutions, ultimately declining degree attainment and social mobility of American citizens (U.S. Department of Education, 2016, McGuire, 2018). ACT, Inc. (2017) data suggests that overwhelming percentages of high school graduates are academically underprepared and are not college-ready. Moreover, an overwhelming number of academically underprepared students come from historically underrepresented populations. To help increase access and college readiness among these populations, specialized programs and services must be implemented to ensure these students are successful at the college level. The Dr. Charles W. Donaldson Scholars Academy is a …

Influence Of Knot Strength On The Mechanical Performance Of A Biodegradable Gillnet, Louis Le Gué, Esther Savina, Mael Arhant, Peter Davies, Nicolas Dumergue, Benoit Vincent

Faculty, Staff and Student Publications

Ghost fishing is a global issue that can be addressed using fishing gear materials that do not persist in the marine environment. However, for these alternatives to be widely adopted, they must meet the same mechanical specifications as current commercial materials while degrading without any negative impact. The objective of this study was to compare a conventional gillnet made of polyamide 6 (PA6) with an alternative made of poly(butylene succinate-co-adipate-co-terephthalate) (PBSAT) at three different scales: monofilament, knot, and net. While the PBSAT monofilament's strength was half that of the conventional PA6 net, knot and net losses were even more significant. …

2024 July 4 - Tennessee Weekly Drought Summary, Tennessee Climate Office, East Tennessee State University

Tennessee Climate Office Weekly Drought Summaries

No abstract provided.