Digital Commons Network^™

Experimental Investigation On The Effect Of Adding Butanone To Gasoline In Si Engine Emissions And Performance, Abed Al-Khadhim Hassan, Sadeq Jassam

Engineering and Technology Journal

This research is performed to study and investigate the influence of adding some ketone compounds on performance, emissions, and heat balance of spark ignition engine. The compound used in this study is butanone (C4H8O). The importance of the research lies in increasing the octane number by adding specific percentages of butanone and showing its impact on improving the combustion process, performance and reducing pollutants. This ketone has been added to the basic fuel (gasoline) with three concentration ranges (3, 6 and 9%), respectively.  All experimental tests were carried out on gasoline engine type (Nissan QG18DE), four cylinders, and 4-stroke. The …

A-Review For The Cooling Techniques Of Pv/T Solar Air Collectors, Wisam Saleh, Abdullateef Jadallah, Ahlam Shuraiji

Engineering and Technology Journal

A solar thermal collector is one of the most popular applications of solar energy. It is a photovoltaic (PV) cell system with a thermal collector system, this system is utilized in the production of electrical energy and many applications. The system is able to produce electrical energy directly from the sunlight using the photoelectric effect. Meanwhile, it also extracts heat from the PV and heats the fluid (airflow) inside the collector. In this review, the solar PV system and solar thermal collectors are discussed. Usually, solar collectors are exposed to damage and their efficiency decreases when the temperature rises. Need …

Experimental Investigation Of Artificial Cavities Effect Of Single-Phase Fluid Flow And Heat Transfer In Single Microchannel, Qahtan Al-Nakeeb, Ekhlas Fayyadh, Moayed Hasan

Engineering and Technology Journal

In this paper, an experimental study has been conducted to investigate the influence of artificial cavities (artificial nucleation sites, ANS) in a single microchannel on the characteristics of flow and heat transfer at a single-phase flow. The experiments were performed with deionized water as a working fluid at 30OC inlet temperature with a range (108.6-2372) of Reynolds numbers. Three models of the straight microchannel (model-1, model-2, and model-3) were manufactured of brass having a rectangular shape with a hydraulic diameter of (0.42 mm). Model-1 has a smooth surface, while model-2 has artificial cavities with a number of 40 ANS located …

Evaluating The Adhesive Properties Of Four Types Of Conventional Adhesives, Muhanad Mosa, Mohsin Hamzah

Engineering and Technology Journal

The development of manufacturing technology led to the appearance of various products that need effective types of adhesives with good strength and durability in different types of joints. Accordingly, the issue is how to choose the appropriate adhesive for the specific application relying on the properties of adhesive besides, the work conditions. This work deals with the experimental testing of four types of an adhesives that have been prepared to test by the two types of joints to comprehend the behavior of adhesives then choose the most effective and optimum type. The Butt and single lap joint tests were achieved …

Heat Transfer In Electronic Systems Printed Circuit Board: A Review, Mustafa Kadum, Ahmed Imran, Sattar Aljabair

Engineering and Technology Journal

Thermal regulation has now become a staple in the design of electronic devices. As a result of technological advances in the electronic industry, component miniaturization and thermal system management are becoming more and more important. Due to the high demand for device performance and the need for better thermal management, this paper present a detailed theoretical review of heat transfer by conventional methods in electronic devices and equipment such as air cooling, water cooling, etc. to provide an ideal framework for a practical application in electronic cooling. With reference to the possibility of investing unconventional ways to reduce the energy …

A Comparative Experimental Study Analysis Of Solar Based Thermoelectric Refrigerator Using Different Hot Side Heat Sink, Nora Numan, Mahmmoud Mahdi, Majida Ahmed

Engineering and Technology Journal

The heat sink influences heat dissipation at the hot junction of the Peltier module and, hence, affects the performance of the thermoelectric refrigerator. The present work compares the performance of solar-powered thermoelectric refrigerator units with capacity (30 Liter) for two cases by employing two different heat sink types. In case (I) The Peltier module (12706) is connected with a heat sink type of Hot wall air-cooled (HWAC). In case (II) the Same Peltier is connected with a heat sink type of hot wall air-cooled with a heat exchanger (HWACHE). The exergy analysis method can help to determine the exergy losses …

Experimental Exergetic And Energetic Analysis Of Different (Pv) Array Configurations, Dalya Omer, Mahmoud Mahdi, Ahlam Shuraiji

Engineering and Technology Journal

It is well known that photovoltaic (PV) can be connected in parallel, series, and parallel series. In this study, four PV panels are connected in four different ways, i.e., 4panels parallel (4p), 3panels parallel*1panel series (3p*1s), 2panels parallel*2panels parallel (2p*2p) connected in series, and 2panels series *2panels series (2s*2s) connected in parallel, to determine the best PV panels configuration for supplying DC power to the Variable Speed Compressor (VSC) with the highest average exergy efficiency and minimum exergy losses under sunny daylight hours. Experimental data is used to calculate the exergy efficiency of the mentioned configurations. The best results are …

Manufacturing And Calibration Of Conical Springs Lateral Stiffness Meter, Muhammad Tahir, Shakir Hassan, Jumaa Chiad

Engineering and Technology Journal

The spring is an important mechanical part of which widely used in many industrial applications. There is an urgent need to know its stiffness property before use in any application. Since the stiffness varies according to the method of using the spring in this research, it is suggested to calculate the lateral stiffness of spring by the moment effect. the device meter of the lateral stiffness of conical springs has been designed and manufactured working principle applying a torque to the head of the spring and calculating the angle of inclination. This research includes an experimental aspect (tensile test of …

Design And Implementation Of Remote Real-Time Monitor System For Prosthetic Limbs, Hussein Mansoure, Hadeel Abdullah

Engineering and Technology Journal

Persons with Lower-limb amputations experience movement restrictions resulting in worsening their life quality. Wearable sensors are often utilized to evaluate spatial and temporal qualities and kinetic parameters that provide the mechanism to create interactive monitoring of the amputee prosthesis system. Gait events and detection of the gait phase of amputee movement are essential to control the prosthetic devices of lower limbs.  This paper presents real-time monitoring to individuals with lower limb amputation by using a medical wireless sensor. However,  the proposed system used four medical sensor nodes (such as gait, temperature, the pressure of blood, blood oxygenation (SpO2) )for transmitted …

Flow Improvement And Viscosity Reduction For Crude Oil Pipelines Transportation Using Dilution And Electrical Field, Noor Jalal, Raheek Ibrahim, Manal Oudah

Engineering and Technology Journal

One of the great challenges in pipeline transportation of heavy crude oil is the effect of viscosity on flow rate. By using viscosity reduction techniques, crude oil flow ability can be enhanced. However, the dual effect of dilution and electric fields on crude oil flow ability is still not well addressed. The main goal of this study is to reduce viscosity and improve the flow rate of heavy crude oil through pipelines using dual techniques of electrical field and dilution. The optimization technique was used to investigate the interaction effects of experimental variables on the objective function. As compared to …

Optimization Process For Biodiesel Production From Waste Cooking Of Vegetable Oil By Microwave Irradiation, Raheek Ibrahim, Ahmed Reja, Abeer Kadhim

Engineering and Technology Journal

Biodiesel is the main alternative to diesel fuel today. The waste cooking vegetable oil can be used as a basic material in its preparation. Microwave irradiation is used in its production and it is considered one of the effective methods that do not consume much power. In this study, biodiesel is produce and determine the factors affecting the quality and quantity of production also investigated using experimental design technique. The effecting of operating variables power, time, and oil-to-ethanol molar ratio were studied, as well as the effect of interaction between operating variables on the quality of production. The optimum conditions …

Design And Implementation Of An Electromechanical Brake System, Haider Faisal, Farag Mohammed, Jamal Mohammed

Engineering and Technology Journal

Nowadays, hydraulic brakes are already being replaced by electromechanical brakes (EMB) to improve quick-response brakes, efficient fuel consumption, environmentally sound, simple maintenance, and enhanced safety design. It is suggested that the electromechanical brake will be one of the most important brake systems in the future. This study focuses on designing and implementing an electromechanical brake based on a brushless DC (BLDC) motor and position controller to generate and control the required braking force at a variable friction coefficient between disc and pad. A feedback controller equipped with a measuring sensor is usually utilized to control this type of brake. Thus, …

The Combining Effect Of Inclination Angle, Aspect Ratio And Thermal Loading On The Dynamic Response Of Clamped-Clamped Pipe Conveying Fluid, Jabbar Mohmmed, Mauwafak Tawfik, Qasim Atiyah

Engineering and Technology Journal

The investigation of the vibration of pipes containing flowing fluid is very essential to obtain an understanding of their dynamic behavior and prevent their catastrophic failure due to fatigue. Pipelines are subjected to environmental static and dynamic loading including self-weight, restoring, and Carioles forces. This research aims to investigate the vibrations of pipeline structures for examining their structural integrity under these conditions. A linear Euler-Bernoulli beam model is used to analyze the dynamic response of flexible, inclined, and fixed ends pipe conveying fluid made of polypropylene random-copolymer. Closed-form expression for dynamic response is presented by using combining of finite Fourier …

Corn Oil Performance’S A Bio Cooling Fluid In Electric Distribution Transformer, Ahmed Khudhair, Mohammed Jabal, Samar Ismail

Engineering and Technology Journal

Biodegradable (Vegetable) fluids are considered as environmentally friendly fluids and possess an abundant benefit, they are wildly available by means of renewable sources compared to different kinds of mineral-oil.  Given the occurrence of environmental pollution and health problems from mineral oils.  This paper investigates the effect of utilizing the corn oil for the cooling performing features of distribution electric transformer, and making a comparison with the cooling performance of the electric transformer whith cooling by the commercial mineral fluid. This investigation is done by using the four- ball machine and electric transformers. Each experiment that was executed complies with ASTM …

Elevated Temperature Corrosion Of Mechanical Properties And Fatigue Life Of 7025 Aluminum Alloy, Mohammed Alwan, Hussain Al-Alkawi, Ghada Aziz

Engineering and Technology Journal

Aluminum alloys are widely used in aircraft industry where good corrosion resistance, light weight and high strength are the primary requirements. In the present study, attempts have been made to extend the application of mechanical and fatigue properties of AA7025 in laboratory with corrosive environment of media and combined corrosive at elevated temperature (ET) 150⁰C. The experimental results and analysis of corrosion and corrosion - elevated temperature mechanical and fatigue behavior of the samples showed that the 3.5%NaCl corrosive media and corrosion - elevated temperature (ET) greatly decrease the properties mentioned. The Ultimate Tensile Strength (UTS) and Yield stress YS …

Thermal Performance Of An Evacuated-Tube Solar Collector Using Nanofluids And An Electrical Curtain Controlled By An Artificial Intelligence Technique, Hussam Rashid, Khalid Sultan, Hosham Anead

Engineering and Technology Journal

This paper studies the improvement of an evacuated tube solar collectors(ETSCs) performance in two way. The first is by adding a finned electronic curtain in front of the solar collector. While the second is by using a nanofluid instead of pure water. The purpose of the curtain is to increase the amount of solar radiation reflected toward the collector. The curtain is distinguished by its self-ability to track the sun's rays automatically. The electronic curtain is also closed to shade the tubes depending on the movement of the electronic curtain's fins and the nanofluid's temperatures. MATLAB algorithm has been used …

Mitigating Uas Airspace Risks Through Policy Innovation, Christopher Daniel Sidor

Student Research Symposium (SRS)

Uncrewed Aircraft Systems (UAS), commonly known as drones, have become an everyday part of our lives. Once a technology reserved for the defense industry, UAS are now widely available and affordable in the commercial market. These systems have been used for intelligence, surveillance, and reconnaissance (ISR) missions, route mapping, and kinetic deployment of munitions. In modern warfare, drones have been at the forefront, leveraging new tactics, techniques, and procedures to enhance lethality and destruction. The integration of fiber-optic (FO) connected drones, first-person view (FPV) technology, and 3D printed munition-dropping devices in particular demonstrates a dire need for legislative intervention. These …

Full Issue

Newsletter of the Jussi Björling Societies of the USA & UK

No abstract provided.

Words Of Remembrance Of Jacob Forsell 1942-2023, Janel E. Lundgren

Newsletter of the Jussi Björling Societies of the USA & UK

The eminent photographer and writer Jacob Forsell has died at the age of 81. He has been of great importance both to Jussi Björling’s cause as well as to the Jussi Björling Society. He had a strong connection to Jussi via his close kinship with John Forsell: he was the grandson of the renowned singer and opera director, who meant so much to Björling’s early career. Therefore, he seemed specially sent to be the editor of a luxurious gift and anniversary book with the name: Jussi: the Song, the Man, the Pictures, together with Harald Henrysson and Björn Ranelid. This …

Henry Fogel Zoom Presentation For Jbs-Usa On Tuesday, October 24, 2023, On The Topic,, Janel E. Lundgren

Newsletter of the Jussi Björling Societies of the USA & UK

Arts executive extraordinaire Henry Fogel will conclude the JBS-USA Zoom Series for 2023 with a comparative presentation on Jussi’s live performance and studio recordings, drawing on his exceptional collection of recordings for musical examples. The broadcast will air live on Tuesday, October 24 at 7:30 pm ET, and will be repeated on Saturday, October 28 at 12 noon ET. Members and non-members will be able to register to attend this event on our website beginning September 1.

He Sings In The Spirit Of His Father, Calle Friedner

Newsletter of the Jussi Björling Societies of the USA & UK

It’s a beautiful summer’s day. We are in Jussi Björling’s and his family’s summer paradise on Siarö in the archipelago north of Stockholm, now divided between the two siblings, Ann- Charlotte and Lars. He has built a house of his own and couple of out-buildings in the part of the site where Jussi’s singing studio is situated. Lars is happy: this day he and his wife Leila have been married for exactly seven weeks. We’ll come back to that.

The outdoor temperature is 77 degrees F, but we are sitting talking in the shadow of the trees. Lars says it …

Full Issue

Newsletter of the Jussi Björling Societies of the USA & UK

No abstract provided.

Thorborg Biography Published, Christer Eklund

Newsletter of the Jussi Björling Societies of the USA & UK

Of the many colleagues who sang with Jussi Björling over the course of his career, Kerstin Thorborg was the closest to him in home ground: she also was born in the province of Dalarna, about 50 miles North of Jussi’s birthplace of Borlänge. In many ways, their careers also were similar, since both had major parts of their professional lives in the United States, centered around the Metropolitan Opera. Thorborg was deeply admired for her vocal range as well as for her acting skills in a wide range of roles.

In 2003 I took over managing the archive of the …

The Economic Basis Of Politics, And Related Writings, Charles A. Beard, William Beard

Hannah Arendt Marginalia - All

Call#: JA77 .B4 1957

New York : Vintage Books, 1957.

Contains underlining, marginal lining

PDF Information: 9 pages - 1.8MB

Building Competence And Confidence Through Experiential Learning: A Case Study Of The Bengal Triathlon, Caroline E. Faure Edd; Atc

The COSMA Journal

This descriptive case study examines the perceived effectiveness of the Bengal Triathlon, an experiential learning (EL) activity integrated into a sport management course at Idaho State University. Drawing on student reflections over three years, the study highlights how this experience enhanced students’ confidence and skills in planning and managing sport events, particularly in high-pressure areas such as risk management, event logistics, and customer service. Despite participation being a course requirement, a noticeable shift in student attitudes was observed. Students moved from seeing the event as a mandatory task to taking full ownership, driven by increased motivation and enjoyment. This case …

Hsb Model Comprising Health Literacy, Self-Efficacy, And Blood Sugar Control Behaviors To Empower Older Patients With Type 2 Diabetes In Phetchaburi Province, Thailand, Phasit Sirited, Pattama Suphunnakul

Journal of Health Research

Background: This research aimed to develop an empowerment model (HSB model) to effectively control blood sugar levels and glycosylated hemoglobin (HbA1c) among older patients with uncontrolled type 2 diabetes in Phetchaburi Province, Thailand.

Methods: The study utilized a mixed-methods approach comprising two phases. Phase 1 involved quantitative research on 300 participants using questionnaires to investigate the causal factors related to blood sugar control behavior (α = 0.85). Data analysis was conducted using descriptive statistics and Structural Equation Modeling (SEM). Phase 2 used qualitative research methods, specifically focus group discussions and brainstorming with relevant parties, to develop the HSB empowerment model …

Building Capacity, Changing Teaching Practices: Insights From A Professional Development Program For Educators In A Low-Income Country, Caroline Havery, Mary Kililo, Julie Dopsie, Mary Roroi, Di Brown, Ali Moloney, Lisa Townsend, Amanda Neill, Michele Rumsey, Chris Rossiter, Thelma Ali

Pacific Journal of Health

Background

Building capacity of health professional educators in low- and middle-income countries can improve population health outcomes through upskilling the health workforce. However, education programs must respond to local contexts and challenges including participants’ needs and expectations, language difficulties, and resource limitations. This paper evaluates a program for nursing and community health worker educators in Papua New Guinea.

Methods

This qualitative descriptive study was designed and implemented using a collaborative partnership approach. It comprised six focus groups with 26 educators who were program participants. Thematic analysis examined participants’ perceptions of the program and their implementation of change projects.

Results

Four …

Arachne V8.7: Multi‑Modal Energy‑Harvesting Smart‑Skin With Hierarchical Fractal Morphology, Distributed Mis Interface, And Integrated Structural‑Health Monitoring, Michael Victor Caldwell Mr.

Defensive Publications Series

Arachne v8.7 is a multi‑modal “Smart‑Skin” substrate designed for distributed, durable energy harvesting. The system integrates a triboelectric nanogenerator (TENG) layer, a thermoelectric SnSe layer, and a ZnO nanowire kinetic layer beneath a hierarchical fractal surface engineered to enhance boundary‑layer turbulence. A separated NS‑DBD plasma‑electrode PCB provides surface‑conditioning and environmental robustness. A 6‑pin Magnetic‑Inductive Snap (MIS) interface enables modular power routing, environmental telemetry, and activation of a UV‑curable DCPD‑PDMS self‑healing layer. Embedded fiber‑optic strain sensors provide real‑time structural‑health data for the APR AI predictive‑maintenance engine. This disclosure defines the system architecture, materials, electrical interface, sensing logic, and functional principles required …

The Caldwell Method: A Multi‑Ai, Safety‑First Framework For Real‑World, Open‑Hardware Invention, Michael Victor Caldwell Mr.

Defensive Publications Series

The Caldwell Method is a human‑driven, AI‑augmented invention framework developed by independent inventor Michael Victor Caldwell Mr. (GCI). The method uses four to five independent artificial intelligence systems to evaluate, correct, and validate every invention concept before publication. Each AI must independently analyze physics, materials, manufacturability, safety, cost, and real‑world viability. Any flaw identified by one AI is circulated to all others through a cross‑AI correction loop until all systems converge on the same factual answer. An invention only advances when all AIs unanimously confirm feasibility and safety.

This process ensures that no half‑validated or speculative ideas are released. …

Unitary Lattice Harmonic Pinning: A Method For Stabilizing High-Density Lithium-Rich Manganese Cathodes Via Vacuum-Constant Synchronization, Quincy Allen Jones

Defensive Publications Series

This disclosure describes a novel structural architecture for high-density (>500 Wh/kg) lithium-rich manganese (LMR) oxide cathodes, specifically addressing the industry-wide failure of voltage fade and transition-metal migration. The invention utilizes a Unitary Lattice Spacing (d) of 12.34 Å, engineered to achieve a harmonic resonance with the vacuum spin-alignment constant (R_{crp} \approx 7.589 Å).

By synchronizing the lattice modulation to the R_{crp} value, the system creates a 'Harmonic Pinning' effect that suppresses Jahn-Teller distortion and Mn-migration into the lithium layer. Unlike traditional chemical coatings or dopants, this method employs a purely structural 'Zero-Strain' phase, validated by X-ray diffraction (XRD) peak …