Digital Commons Network^™

Comparison Between Numerical, Analytical, And Field Solutions With Experimental Data For 90º Open Channel Junctions, Ahmed Zahran, Tamer A. Gado, Ebrahim Rashwan

Journal of Engineering Research

Junction in open channel flow points out any side water secession from natural or artificial channels. In the last decades, comprehensive theoretical and experimental investigations on the dividing flow in open channel junctions have been executed to understand the characteristics of this separating flow. In this research, a three-dimensional turbulence model by fluent software used to replicate the flow characteristics of a 90º open channel junctions for two geometries. One is with equal width and horizontal bed and the other is field canal junction with irregular section. The modeling is based on the Navier-Stokes equation and κ-ω turbulent model. Comparing …

Determination Of Upper And Lower Limits Of Concession Period For Ppp Projects Using Probabilistic Npv, Mohamed M. Elbaz, Adel Eldesouky

Journal of Engineering Research

This paper provides a methodology to determine the upper and lower limits of concession period of public private partnerships that would be useful both to the public and the private sector with the impact of risks and uncertainties taken into consideration. The model uses Monte Carlo simulation to evaluate the effect of risks and uncertainties on the concession period. Net present value (NPV) analysis is used for financial evaluation. To demonstrate the applicability of the proposed model, hypothetical public private partnership (PPP) rail way project in Egypt was used a case study. After applying the model accurate results are obtained. …

Performance Enhancement Of Reverse Osmosis (Ro) Membrane Using Nanocomposite Materials, A. E. Kabeel, A. Khalil, Y. A. F. El-Samadony, Maisa A. Sharaf

Journal of Engineering Research

Many attempts were made to enhance the performance of reverse osmosis (RO) membranes in the desalination process. Using ion exchange (IX) bed before RO process and modifying the structure of RO membranes are some of these attempts. Thin film nanocomposite (TFN) membrane is the novel type of RO membranes which is the best in nanofiltration applications. TFN membranes have many new advantages due to the change of their structure in comparison with traditional membranes. In this study the performance of a TFN membrane was compared with that of standard thin film composite (TFC) spiral wound water desalination RO membrane for …

An Energy Efficient Sleep/Wake Up Routing Protocol For Wireless Sensor Networks, Dina El-Feky, Nada Elshennawy, Mahmoud Fahmy Amin

Journal of Engineering Research

In recent years, wireless sensor networks (WSNs) have a rapid development and they take a lot of research attention because of their wide-range applications. A WSN consists of a large number of distributed sensor nodes. These nodes are often deployed in remote or hostile areas to monitor physical or environmental conditions where they send this data to a main location. The most critical parameter in WSNs is network lifetime, so an efficient routing protocol is essential to reduce the energy consumption and to increase the network lifetime. This paper proposes an energy-efficient chain-based cooperative routing protocol based on node sleep/wake-up …

Numerical Investigation Of Combustion In Hcci Diesel Engine Fuelled With Biodiesel Blends, A. E. Kabeel, E. A. Elshenawy, M. Elkelawy, Hagar Alm Eldin Mohamad, Mahmoud M. Elshanshoury

Journal of Engineering Research

Homogeneous Charge Compression Ignition (HCCI) is an advanced combustion technology being considered for internal combustion engines due to the potential for high fuel conversion efficiency and extremely low particulate matter (PM) and Nitrogen Oxides (NOx) emissions. In HCCI engines, there is no direct control method for auto ignition time. A common method to indirectly control the ignition timing in HCCI combustion engines is altering engine’s parameters which can affect the combustion. Previous research has indicated that fuel chemistry has a strong impact on HCCI combustion. This work introduces a new predictive multi-zone model for the description of combustion in HCCI …

Investigation Of The Axial Rotor Thrust In Centrifugal Compressors استقصاء الدفع المحورى على العضور الدوار فى الضواغط النابذة, Aly M. Elzahaby, S. A. El-Agouz, Ahmed Farid Nemnem, Abdelhady Abelzain Mubarak

Journal of Engineering Research

الهدف من البحث هو دراسة وتحليل والتعين الدقيق للدفع المحورى علىالعضو الدوار فى الضواغط الطاردة المرکزية. نشرح العوامل التى تؤثر علىالدفع المحورى مثل زيادة الأحمال على ضاغط ثانى أکسيد الکربون عنأوضاع التشغيل التصميمية له . کما تتضمن العوامل تأثير وجود Fouling مع الغاز مما ينتج عنه تراکم على الأسطح الداخلية لدفاعات العضو الدوارفيتسبب فى زيادة الدفع المحورى وتقليل من أداء الضاغط . يتناول البحثشرح العلاقة مابين الدفع المحورى للعضو الدوارفى وجود نسبة Foulingمع الغاز فى خلال فترة زمنية محددة من بعد عمل عمرة کاملة لضاغط ثانىأکسيد الکربون . بعد الدراسة والتحليل نقف على کيفية تقليل الدفع المحورىعلى العضو الدوار وذلک …

Water Hammer Phenomenon: Analysis And Solutions ظاھرة الطرق المائى : التحليل والحلول, Aly M. El Zahaby, Elsayed El Agouz, Mohamed Amr, Bahgat Abd El-Rahman

Journal of Engineering Research

تعتبر المطرقة المائية ظاھرة معقدة يجب التعرف على تأثيرھا الضار حتى نجدالحلول المناسبة لمنع ھذه الاضرار وتنشأ المطرقة المائية نتيجة التغيرالمفاجى فى سرعة المياه داخل الأنابيب نتيجة انقطاع المغذى لمحرکاتالطلمبات فجاة أو القفل المفاجئ للمحابس أثناء التشغيل وينتج عنھا ارتفاعوانخفاض مفاجئ فى الضغط وظھور موجة ضغط موجبة وسالبة تتحرکبسرعة الصوت مما يسبب أضرار بالغة مثل ( انفجار المواسير – تدميرالطلمبات – تدمير المحابس .... ) وتھدف الدارسة إلى تحليل ووضع الحلوللظاھرة الطرق المائى أو منعھا عن طريق ترکيب أجھزة الحماية مثل( خزاناتالفائض – خزانات المياه والھواء – محابس الأمان – محابس الھواء ) تناولالبحث تطبيق عملى على أحدى منظومات محطات …

Optimization Of Irrigation Pipelines Design For Minimizing The Effects Of Water Hammer Phenomenon أمثلة تصميم شبکات الرى مع تقليل تأثيرات الطرق المائى, Aly M. El Zahaby, Elsayed El Agouz, Mohamed Amr, Bahgat Abd El-Rahman

Journal of Engineering Research

للطلمبات بأنقطاع التيار وعودتھ فجأة أو القفل والفتح السريع للمحابس علىخطوط الرى نتيجة لذلک يحدث ارتفاع وأنخفاض مفاجئ للضغط داخلالمواسير يتسبب فى أنفجار المواسير وتحطيم المحابس والطلمبات ولتلافىالإضرار بسبب ھذه الظاھرة يتطلب التحکم فى طريقة التشغيل والإيقافللطلمبات والتحکم فى طريقة القفل والفتح للمحابس على الخطوط وکذلک يتمإضافة أجھزة الحماية لتقليل تأثيرات الطرق المائى مثل خزانات المياة والھواء– خزانات الفائض – محابس الھواء – محابس الأمان – محابس التحکمويھدف البحث إلى : دراسة وتحليل ظاھرة الطرق المائى لمنظومة رى عندطولھ FN4 , FVC انقطاع التيار فجاة ولا توجد أجھزة حماية لخط مياه– ۲۰۰۰ متر للاقطار من ٤٥۰ مم – ۸۰۰ مم …

تقييم تأثير وسائل الاعلام والدعاية على إدراک المستخدمين للعمارة والعمران "دراسة حالة مشروعات الاسکان في مصر" Evaluating The Impact Of Media And Advertising On Users' Perception Of Architecture And Urbanism "A Case Study Of Housing Projects In Egypt", محمود أمین على سليمان, ولاء احمد حنفی زقدان

Journal of Engineering Research

يعتبر الإعلام فرعًا من فروع الثقافة والفنون والعلوم داخل المجتمعات البشرية بشكل عام. وهذا يشمل فنون وعلوم العمارة والمستوطنة ، والتي تعنى بإقامة وبناء مساكن ومنازل أفراد هذه المجتمعات. وهكذا ، فإن جميع أنواع وسائل الإعلام المختلفة والمواد المذاعة ذات الصلة والرسائل المنقولة ، لها تأثير كبير على تشكيل ثقافة وعقلية ومعتقدات هذه المجتمعات البشرية ، فيبالإضافة إلى تأثيرها المؤثر على توجه سلوكهم. ومع ذلك ، فإن وسائل الإعلام لا تتناول علم وفن العمارة و ekistics - حيث همتمثل واحدة من أهم القضايا الثقافية والمعرفية - بدرجة كافية ، إذا ما قورنت بالعديد من الموضوعات الثقافية الأخرى. بعد ذلك ، …

Structural, Magnetic And Electrical Properties Of Co-Doped Barium Monoferrite Bafe2o4, Samar I. Abdelsalam, Adel Maher Wahba, M. A. Amer, A. S. Doma, Bahaa Eddin M. Moharram

Journal of Engineering Research

Cobalt-substituted barium monoferrite with theformula BaCoxFe2-xO4 (x = 0.0 – 0.4, step 0.1) has been preparedthrough the sol-gel autocombustion method. Phase purity forprepared samples sintered at 700 and 1050 ̊C was analyzed byX-ray diffraction (XRD) patterns that indicated the formationof the typical orthorhombic phase for the samples. Fouriertransforminfrared (FTIR) spectroscopy was used to investigatethe effect of cobalt doping on the vibrational modes of thestudied samples. Scherrer and Williamson-Hall formulae wereused to define the microstrian and the crystallite size being inthe range of 44.1 to 59.7 nm, which was further confirmed withtransmission electron microscopy (TEM) images. Magneticcharacteristics including magnetic saturation and …

Investigation Of Operational Conditions For The Removal Of Methylene Blue By Fenton Reaction, Aya Tolpa, Mohamed Elsamadony, Hafez Afifi, Mohamed Gar Alalm

Journal of Engineering Research

Fenton reaction has been concerned by many researchersdue to easy operation and effective degradation of bioresistantorganics. This study aims to investigate the effect ofthe operational conditions on the effectiveness of Fenton’sprocess for the decolorization of methylene blue.The influenceof methylene blue, pH, dose of H2O2 , ferrous sulfateconcentration from the wastewater were studied. Experimentshave shown that highly affect by the value of pH, Laboratoryexperiment conducted in the lab proved that pH should bebetween 3 - 4 to give the best results, It also proved that theincreasing of the dose of both hydrogen peroxide and ferroussulfate enhanced the removal efficiency of MB.

Statistical Verification Of 2d-To-3d Conversion Of Size And Number Density Of Particles, Ahmed Elkholy, Wael Rady, Mahmoud Ahmadein

Journal of Engineering Research

Particle/grain size and their number density arecommonly characterized in two dimensions (2D) from planaroptical or SEM micrographs of polished samples. Accurateconversion of such quantities into the three dimensional (3D)values are necessary for prediction of material properties.Several contradicting conversion correlations are available inliterature. The main objective of the current works it to verifysome of them. For this purpose, geometrical (3D) models ofrandomly distributed mono-size spheres were constructed andsliced at different planes. The particle count and their size werevariated within the same control volume. The statisticalinvestigations of the date suggested a (2D)-to-(3D) conversionfactor of 1.152377 ± 0.009427, which is very close to …

Performance Enhancement Of Double Tube Heat Exchanger Using Coiled Fins, A. Khalil, S. A. El-Agouz, A. E. Zohir, A. M. Farid

Journal of Engineering Research

The effect of inserting coil wire in the shell side of a doublepipe heat exchanger on the heat transfer and pressure drop areexperimentally investigated. The experiments are performedusing water as the hot and cold working fluid under the turbulentflow condition. Nine coils with different wire diameter (dw = 2, 4and 6 mm) and different coil pitch ratio (P/ dw = 2.5, 5 and 7.5)are used in the study. Results presented an increasing up to 1.59in the heat transfer coefficient while the pressure drop increased10 times compared with the smooth pipe. Results also showedthat the increase in the heat gain is …

A New Solar Desalination System Design And Heat Recovery, S. A. El-Agouz, M. Abdel Halim, A. M. Awad

Journal of Engineering Research

The work evaluates experimentally technique toimprove fresh water production by careful energy recovery inthe vapour condensation processes; the recovered heat in turnon drives additional evaporation and preheats the feedwater. Apilot plant is designed and constructed in an arid area with 2 m2solar evaporation collector area to evaluate the process. Thisunit is tested on cold and hot days. The effect of mainparameters on fresh water production of the unit is studied. Theexperimental results show that, the production rate andefficiency of the system are strongly affected by solar radiationand level water in solar evaporation collector. Within the studiedranges, the maximum productivity reached …

Bio-H2 Conversion Of Wastewater Via Hybrid Dark/Photo Fermentation Reactor, Khaled El Sharkawy, Mohamed Elsamadony, Mohamed Gar Alalm, Hafez Afify

Journal of Engineering Research

Hydrogen energy is a clean source for liveliness betterthan fossil fuel that has hazardous effects on the environmentand atmosphere. Food wastes and organics in the sewage sludgeare a promising sustainable and renewable source for hydrogenproduction where amalgamation of waste treatment and energyproduction would be more than one benefit expressed intreatment of organic pollutants and energy generation.Discovering biohydrogen production from industrialwastewater by dark and photo fermentation was the main aimof this paper. The biogas produced was composed of H2 andCO2, and the maximum H2 content was 25.94%. This ratio wasachieved at batch configuration system and initial pH 6.2 withstarch concentration 15 …

Theoretical Study Of Thermoelectric Cooling System Performance, A. E. Kabeel, M. G . Mousa, Moataz M.A. Elsayed

Journal of Engineering Research

This work provides a theoretical investigation to study the effect of different operational parameters on theperformance of TE cooling system including the system COP and the rate of heat transfer. The parametersinvestigated are, the applied input power, inlet working fluid velocity, the arrangement of utilized TECs modules andfluid type. The geometry is created with ANSYS multi-physics software as a two-dimensional base case, it isconsisted from two attached horizontal ducts of length (520 mm) and (560 mm), the interface surface between the twoducts contains three thermoelectric modules (4 mm height by 40 mm wide and 40 mm length). The distance betweentwo …

Cfd Study Of Using Different Heat Sinks For Electronic Equipments Cooling, A. E. Kabeel, A. A.Khalil,, M. I. El-Hadary, G. I. Sultan

Journal of Engineering Research

Cooling of Electronic equipment’s is an attractiveresearch area in engineering applications. Continuedminimization of electronic system has resulted in dramaticincrease in the amount of heat generated per unit volume, Theaim of this study is to use computational Fluid Dynamics inorder to draw a CFD model for forced cooling conjugate heattransfer analyses in heat generating electronic systems andcompare between a collection of actual commercial heat sinksdifferent from in geometry ,material , and number of fins .Acomplete computer chassis model with heat sinks and fansinside was created and parametric analyses were performed tocompare the effects of different turbulence models, meshresolutions, and radiative heat …

Heat Transfer Performance Of A Gasketed Plate Heat Exchanger Subjected To Mechanical Vibration أداء إنتقال الحرارة لمبادل حراري من النوع اللوحي مجهز بمانع تسريب يهتز إهتزازا ميکانيکيا, M. K. Bassiouny, A. E. Kabeel, A. Khalil, Y. A. F. El Samadony, A. M. Khaira

Journal of Engineering Research

Heat transfer characteristics in terms of heat transfer coefficient, overall heat transfer coefficient and heat exchangereffectiveness of a vertical counter flow Gasket plate heat exchanger (GPHE) are experimentally investigated. The testedPHE is made of stainless-steel plates with 30° chevron angle (β=30°). The surface enlargement factor, Ф for all plateswas 1.17. Six plates were installed; providing two hot channels and three cold channels in counter flow arrangement.The vibration effect on tested GPHE has been performed and compared with non-vibration model. Vibration frequencies(ω) are in the range of 13.33 to 46.67 cps and vibrational dimensionless amplitude (A/De) varied from 9.14*10-3 to52.66*10-3 at …

The Student Movement Volume 108 Issue 4: Heritage And Harvest: No Leaf Unturned In Our History, Savannah Tyler, Nehemiah Sitler, Nick Bishop, Amelia Stefanescu, Madison Vath, Katrina Johnson, Andrew Francis, Erin Beers, Ruben Colón, Sumin Lee, Rodney Bell Ii, Katherine Pierre, Anna Rybachek, Chris Ngugi

The Student Movement v. 108 (2023-2024)

HUMANS

Autumn Has Awakened, Interviewed by Savannah Tyler

Do You Even Ball? Who is Pastor Shane Anderson, really, Nehemiah Sitler

Genesis Fellowship: Nurturing Faith and Diversity on Campus, Nick Bishop

ARTS & ENTERTAINMENT

A Musical Gift at the Alumni Weekend, Amelia Stefanescu

Artist Highlight: Hispanic Heritage Month Edition, Madison Vath

AU Architecture Program Part II, Katrina Johnson

"She and Her Cat": A Sea of Words, Amelia Stefanescu

NEWS

Cardinals Basketball Crash Lands on Alumni Weekend, Andrew Francis

Sparks Fly for Student Missionaries in Bolivia, Nehemiah Sitler

IDEAS

Are Adventists Forfeiting Their Future?, Erin Beers

Honduras: Discovery of America Day, Ruben …

Connecticut Brownfields Site Inventory, Connecticut Department Of Energy And Environmental Protection

Datasets

No abstract provided.

The Beacon, October 6, 2023, Beacon Staff

The Beacon, 2023-2024

Students dive into culture with SOS; Embracing childhood creativity; Heartfelt addition to indie rock genre; Eerily plausible sci-fi story comes to screen; Show highlights friendship and whimsy; Rend Collective coming to Raider Nation; Tim Tebow, Craig Groeschel talk leadership; Students embark on summer missions trip; Sustainable shopping available in Orange City; Cultivating creatively; The corn is too tall; The importance of storytelling; NW's tennis teams defeat Mount Marty; Busy Saturday ahead for NW student athletes; Athletes of the week: Volleyball and soccer; Escaping routine to reflect on identity;

Unveiling Novel Avenues In Mtor-Targeted Therapeutics: Advancements In Glioblastoma Treatment, Shilpi Singh, Debashis Barik, Karl Lawrie, Iteeshree Mohapatra, Sujata Prasad, Afsar R. Naqvi, Amar Singh, Gatikrushna Singh

Biology Student Work

The mTOR signaling pathway plays a pivotal and intricate role in the pathogenesis of glioblastoma, driving tumorigenesis and proliferation. Mutations or deletions in the PTEN gene constitutively activate the mTOR pathway by expressing growth factors EGF and PDGF, which activate their respective receptor pathways (e.g., EGFR and PDGFR). The convergence of signaling pathways, such as the PI3K-AKT pathway, intensifies the effect of mTOR activity. The inhibition of mTOR has the potential to disrupt diverse oncogenic processes and improve patient outcomes. However, the complexity of the mTOR signaling, off-target effects, cytotoxicity, suboptimal pharmacokinetics, and drug resistance of the mTOR inhibitors pose …

Faculty Senate Meeting Minutes Oct 6, 2023, A-State Faculty Senate

Faculty Senate Minutes

Meeting minutes for the Faculty Senate held on October 6, 2023.

Behavioral Biases, Financial Literacy, And Investment Decision: A Case Of Individual Investors In Pakistan, Arslan Saleem, Muhammad Usman, Zahid Bashir

Business Review

This research dives into the interesting world of investment choices and analyses the influence that behavioural biases and financial literacy play in the process. The study uncovers the direct impact of behavioural biases such as anchoring, optimism bias, and loss aversion on investment decisions by using primary data from individual investors in the Lahore region. These individuals participated in the study. According to the findings of the study, having a solid understanding of finance can help mitigate the effects of cognitive biases and lessen the toll they take on investment choices. The study underscores the necessity for future research on …

Facial Motion Augmented Identity Verification With Deep Neural Networks, Zheng Sun

Theses and Dissertations

Identity verification is ubiquitous in our daily life. By verifying the user's identity, the authorization process grants the privilege to access resources or facilities or perform certain tasks. The traditional and most prevalent authentication method is the personal identification number (PIN) or password. While these knowledge-based credentials could be lost or stolen, human biometric-based verification technologies have become popular alternatives in recent years. Nowadays, more people are used to unlocking their smartphones using their fingerprint or face instead of the conventional passcode. However, these biometric approaches have their weaknesses. For example, fingerprints could be easily fabricated, and a photo or …

#1 On The U.S. Most Wanted List: Why The Push Is On To Ban The World’S Most Successful Startup From Academic, Government And Military Devices In The United States, Tom Waters

GNSI Publications

TikTok is a social media application that has amassed over 100 million users in the United States. Yet the Biden White House, like the Trump Administration before it, seeks to ban TikTok, or at least force it’s divestment from the parent company, Bytedance. For many the question is how can an app for sharing silly dance videos among teenagers be a national security threat? Unfortunately, the problem is considerably more complex than this simple question. TikTok’s unprecedented success comes from its powerful artificial intelligence-based algorithm.

That activity produces a comprehensive psychological profile of each user and tailors the queue of …

Sga 55 Senate 2023-10-06 Agenda, Niu Student Government Association Senate

Student Government Association Archives

No abstract provided.

My Guy Sa Malakanyang: Ang Mga Internal At Eksternal Na Problema At Hamong Tinugunan At Kinaharap Ng Administrasyon Ni Pangulong Ramon Magsaysay (My Guy In Malacañang: The Internal And External Problems And Challenges Addressed And Faced By The Administration Of President Ramon Magsaysay), Jeremiah Montejo

Mabini Review

One of the most celebrated personalities in the political arena, both domestically and internationally, is the 7th President of the Philippines Ramon del Fierro Magsaysay Sr., Most known as “My Guy.” He gained mass support and almost a cult-of-personality status thanks to his unique campaign jingle, “Mambo Magsaysay,” composed by Sen. Raul Manglapus in 1953. Despite holding the highest position in government, he is remembered as a president who look for and cared for the Common tao (common people) due to his down-to-earth personification. Tracing roots into his humble begginings being raised in simple way of life in the town …

Continuous Spin Excitations In The Three-Dimensional Frustrated Magnet K2ni2 (So4)3, Weiliang Yao, Qing Huang, Tao Xie, Andrey Podlesnyak, Alexander Brassington, Chengkun Xing, Ranuri S.Dissanayaka Mudiyanselage, Haozhe Wang, Weiwei Xie, Shengzhi Zhang, Minseong Lee, Vivien S. Zapf, Xiaojian Bai, D. Alan Tennant, Jian Liu, Haidong Zhou

Faculty Publications

Continuous spin excitations are widely recognized as one of the hallmarks of novel spin states in quantum magnets, such as quantum spin liquids (QSLs). Here, we report the observation of such kind of excitations in K2Ni2(SO4)3, which consists of two sets of intersected spin-1 (Ni2+) trillium lattices. Our inelastic neutron scattering measurement on single crystals clearly shows a dominant excitation continuum, which exhibits a distinct temperature-dependent behavior from that of spin waves, and is rooted in strong quantum spin fluctuations. Further using the self-consistent-Gaussian-approximation method, we determine that the fourth- and fifth-nearest-neighbor exchange interactions are dominant. These two bonds together …

Sixty Years Of Service In Africa: The U.S. Peace Corps In Cameroon, Julius A. Amin

Books and Book Chapters by University of Dayton Faculty

Based on previously unused primary sources obtained from both sides of the Atlantic, this study provides a more fundamental, consistent, and balanced source-based assessment of the role of the U.S. Peace Corps across its entire existence in Africa. The study sheds light on a new and intriguing historical perspective of the Peace Corps’ meaning and significance. Though the main trust is Cameroon, the study offers a window to understanding Peace Corps performance in all of Africa, and the larger global community. It examines Volunteers’ service in countries including Nigeria, Ghana, Togo, and Guinea, showing how the agency transitioned from a …