Ingeniørvidenskab: generelt

Expansive clays suffer very abrupt volumetric changes in the presence and absence of water, a synonym of instability that is reflected in technical and economic problems. The city of Los Mochis, Sinaloa, Mexico, has a high percentage of clays, which has been a challenge for engineers to build on unstable soil. Studies have been made with different soil stabilization techniques with different materials, such as lime, hydraulic cement, phosphates, aluminum salts and recently polymers. In this research we used the polymer diallyl dimethyl ammonium chloride (DADMAC), which is generally used as a flocculant polymer for water treatment.

Studienarbeit aus dem Jahr 2022 im Fachbereich Ingenieurwissenschaften - Maschinenbau, Note: 1,0, Hochschule für Angewandte Wissenschaften Hamburg, Sprache: Deutsch, Abstract: Im Rahmen der Studienarbeit soll das Potential zur stofflichen Verwertung von Lithium-Ionen-Akkumulatoren untersucht werden. Hierfür werden Aufbau und Herstellung gängiger Akkumulatorbauformen beschrieben und es werden basierend auf einer Literaturrecherche verschiedene stoffliche Verwertungsmethoden aufgelistet und gegenübergestellt. Abschließend erfolgt ein Ausblick auf die zukünftige technologische und industrielle Entwicklung der vorgestellten Konzepte sowie auf die benötigten Schritte für zunehmend nachhaltige Verwertungskonzepte.Durch den Ausbau der Elektromobilität sowie durch den zunehmenden Fortschritt der Digitalisierung und des Ausbaus erneuerbarer Energien nimmt der Bedarf an elektrischen Energiespeichern rasant zu. Vor diesem Hintergrund gewinnt der Einsatz von Lithium-Ionen-Akkumulatoren (LIA), die sich insbesondere durch die vielfältige Anwendbarkeit aufgrund der hohen Energiedichte und durch eine hohe Lebensdauer auszeichnen, zunehmend an Bedeutung.Da LIA zur Herstellung auf Rohstoffe angewiesen sind, die zum einen in begrenzten Kapazitäten vorkommen und zum anderen teilweise unter ökologisch und sozial umstrittenen Bedingungen gewonnen werden, ergibt sich hier der Bedarf einer zunehmend ganzheitlich nachhaltigen und zuverlässigen Rohstoffversorgung. Neben der Wiederverwendung der LIA nach dem primären Einsatz für andere Anwendungen mit geringeren Anforderungen spielt dabei die stoffliche Verwertung eine wesentliche Rolle, um die benötigten Rohstoffe im Sinne einer Kreislaufwirtschaft zurückzugewinnen. Somit bietet sich das Potential, den Einsatz der Technologie nachhaltiger und durch die neue Versorgungsquelle auch zuverlässiger und robuster zu gestalten. Abbildung 3 zeigt als Auszug einer Risikoanalyse eine methodische Bewertung der Risiken verschiedener Lithiumquellen sowie der gesamten Rohstoffe für zusammengesetzte Akkumulatoren für das Jahr 2021.

Research Paper (postgraduate) from the year 2022 in the subject Engineering - Civil Engineering, grade: A, , language: English, abstract: This paper discusses preparation and setting elements of hardened concrete. The strength of hardened concrete is its resistance to forces. When a force compresses instead of stretches or pulls, this is known as compressive strength. The compressive strength of hardened concrete is regarded as its most critical quality indicator. Strength can indirectly reflect the majority of concrete properties directly related to the structure of hardened cement paste. Longer-lasting concrete is dense, compact, impermeable, weatherproof, and chemically resistant. However, employing more cement could make concrete more resistant to drying shrinkage and cracking, but also more durable. Depending on the material's workability, the type of compaction used to thoroughly compress the material will vary. In other words, the workability of concrete is contingent upon compaction and technique. Moreover, it relies on the working environment. These external vibrators are suitable with precast concrete. This approach delivers uniform vibration and reliably compacts prefabricated concrete. Prior to installation, concrete units are compacted using a vibrating table. Thus, the curing of concrete is completed by employing these approaches.

This book gathers selected peer-reviewed papers from the 15th World Congress on Engineering Asset Management (WCEAM), which was hosted by The Federal University of Mato Grosso do Sul Campo Grande, Brazil, from 15--18 August 2021This book covers a wide range of topics in engineering asset management, including: strategy and standards;sustainability and resiliency;servitisation and Industry 4.0 business models;asset information systems; andasset management decision-making.  The breadth and depth of these state-of-the-art, comprehensive proceedings make them an excellent resource for asset management practitioners, researchers, and academics, as well as undergraduate and postgraduate students.

This volume comprises papers from the 18th Conference on Systems Engineering Research (CSER). The theme of this volume, "e;Recent Trends and Advances in Model-Based Systems Engineering,"e; reflects the fact that systems engineering is undergoing a transformation motivated by mission and system complexity and enabled by technological advances such as model-based systems engineering, digital engineering, and the convergence of systems engineering with other disciplines. This conference is focused on exploring recent trends and advances in model-based systems engineering (MBSE) and the synergy of MBSE with simulation technology and digital engineering. Contributors have submitted papers on MBSE methods, modeling approaches, integration of digital engineering with MBSE, standards, modeling languages, ontologies and metamodels, and economics analysis of MBSE to respond to the challenges posed by 21st century systems. What distinguishes this volume are the latest advances in MBSE research, the convergence of MBSE with digital engineering, and recent advances in applied research in MBSE, including growing convergence with systems science and decision science. This volume is appropriate as a reference text in graduate engineering courses in Model-Based Systems Engineering.

Master's Thesis from the year 2023 in the subject Engineering - Mechanical Engineering, , language: English, abstract: This Master thesis discusses the performance of a tent house solar dryer when drying potato slices. A mixed mode natural convection ultraviolet (UV) tent house solar dryer was designed and installed at University Teaching Department, Chhattisgarh Swami Vivekanand Technical University, Bhilai, Chhattisgarh, India for drying potato slices. This solar dryer is equipped with a solar flat plate collector, covered with 5 mm thick glass and consists of two trays of the same size in a drying chamber, on which equal quantities of potato slices were placed. The local atmospheric conditions including relative humidity, atmospheric temperatures, solar intensity and wind velocity have been recorded for analyzing various parameters. Drying with sun radiation was one of the first uses of solar energy. Since the beginning of time, it has been used mostly to preserve food, however it has also been used to dry other important items like textiles and building supplies. The first solar-powered drying device was discovered in South France and dates to around 8000 BC. A solar dryer is a device that dries items, particularly food, using solar energy. The basic concept of solar dryers is to use solar radiation to heat air, which is used to remove moisture of food. This device also improves the quality, texture, hygiene and color of the crop and vegetables as compared to open sun drying.

The safety, maintainability, and maintenance of systems have become more important than ever before. Global competition and other factors are forcing manufacturers to produce highly safe and easily maintainable engineering systems.

Focusing on office buildings, this book explores how Green Building (GB) development can be managed to achieve successful project outcomes. The book starts by highlighting the special requirements of GBs which distinguish them from traditional buildings. The book then presents a detailed discussion of the success conditions for GB projects. Highlighting 73 success conditions which have been categorised within 20 broad themes, the book reports on the findings from interviews with GB stakeholders from Australia, Hong Kong, Pakistan, Singapore, the United Arab Emirates, and the United Kingdom. The book demonstrates how the complexity, design methodology, and team collaboration prevalent in the delivery of successful GB set them apart from traditional building projects. The book also demonstrates that success in GB delivery is generally associated with socio-technical conditions.The research reported in this book will allow project decision-makers such as clients and project team members to consider the wide range of identified success conditions to optimise project performance across its development stages and achieve successful project outcomes. Theoretically, the findings can inform future research focused on GB development, resulting in the more efficient development of GB projects that can reduce the effects of climate change and resource depletion.

The text defines and covers different themes of post-processing techniques based on mechanical, chemical/electrochemical, and thermal energy. It will serve as an ideal reference text for senior undergraduate and graduate students in diverse engineering fields including manufacturing, industrial, aerospace, and mechanical.

With industrial systems becoming ever more mechanized and reliant on advanced technology, the complexity of equipment, especially in risky industries is increasing on a daily basis. This title offers the knowledge required by safety professionals to provide and maintain the safety of engineering complex systems.

The text provides scientific and technological insights on novel techniques of design and manufacturing using laser technologies. It showcases applications of laser micromachining in the biomedical industry, laser-based manufacturing processes in aerospace engineering, and the high-precision laser cutting in-home appliance sector.

Introduction to Stochastic Level Crossing Techniques describes stochastic models using the System Point Level Crossing method. This involves deriving probability density functions or cumulative probability distribution functions of key random variables, applying simple level-crossing limit theorems.

Introduction to Experimental Methods succinctly explains fundamental engineering concepts in mechanics, dynamics, heat transfer, and fluid dynamics. From conceptualizing an engineering experiment to presenting the results with lab experiments, this book enables students to work through the design process and analyze experimental results.

In the world of transportation, fatigue is a silent killer that can affect us all. Understanding fatigue, including how to manage it to minimize safety risk, is of great importance. However, while it is one thing to recognize that fatigue is a critical safety issue, it is quite another to set up a successful, scientifically informed fatigue risk management programme. This book is here to help. It has been carefully designed as a comprehensive reference point, bringing together international expertise from leaders in fatigue science, and showcasing valuable insights from transportation industry practitioners.The 40 authored chapters are divided into six sections, to better understand fatigue science, the consequences of fatigue in transportation, contributors to fatigue, managing fatigue and promoting alertness, real world case studies of fatigue management in practice, and future perspectives. While it is possible to read each chapter in isolation, most will be gained by reading the book as a whole. Each chapter starts with an abstract overview and concludes with summary bullet points, creating a handy "quick check" for key points.This accessible text is for those who are interested in supporting alert and safe transportation operations. It is suitable for professionals, transport managers, government advisors, policy makers, students, academics, and anyone who wants to learn more. All transport modes (road, rail, maritime and aviation) are considered. For anyone waking up to the complex challenge of fatigue management, this handbook is a must.

Handbook of Laser-Based Sustainable Surface Modification and Manufacturing Techniques discusses the main mechanism behind the surface degradation of structural components in strenuous environments.

With the emergence of additive manufacturing, mass customization of biomaterials for complex tissue regeneration and targeted drug delivery applications is possible. This book emphasizes the fundamental concepts of biomaterials science, their structure-property relationships and processing methods, and biological responses in biomedical engineering. It focuses on recent advancements in biomedical applications, such as tissue engineering, wound healing, drug delivery, cancer treatments, bioimaging, and theranostics.This book:Discusses design chemistry, modification, and processing of biomaterialsDescribes the efficacy of biomaterials at various scales for biological response and drug deliveryDemonstrates technological advances from conventional to additive manufacturingCovers future of biofabrication and customized medical devicesThis volume serves as a go-to reference on functional biomaterials and is ideal for multi-disciplinary communities such as students and research professionals in materials science, biomedical engineering, healthcare, and medical fields.

The fields of Artificial Intelligence and Machine Learning have grown dramatically in recent years, with an increasingly impressive spectrum of successful applications. This book represents a key reference for anybody interested in the intersection between Mathematics and AI/ML and provides an overview of the current research streams.

Energy-Efficient Electrical Systems for Buildings, Second Edition offers systematic and practical approaches to design and analyze electrical distribution and utilization systems in buildings. It considers safety and energy efficiency, focusing on sustainability and resiliency, to design electrical distribution systems for buildings.

Electromagnetic Ergonomics is designed to have a positive influence on public health and worker safety in the work environment and brings broad benefits, in particular with respect to research planning and the interpretation of the results.

Plastic pollution is one of the biggest challenges of the twenty-first century that requires innovative and varied solutions. Focusing on sub-Saharan Africa, this book brings together interdisciplinary, multi-sectoral and multi-stakeholder perspectives exploring challenges and opportunities for utilising digital innovations to manage and accelerate the transition to a circular plastic economy (CPE).This book is organised into three sections bringing together discussion of environmental conditions, operational dimensions and country case studies of digital transformation towards the circular plastic economy. It explores the environment for digitisation in the circular economy, bringing together perspectives from practitioners in academia, innovation, policy, civil society and government agencies. The book also highlights specific country case studies in relation to the development and implementation of different innovative ideas to drive the circular plastic economy across the three sub-Saharan African regions. Finally, the book interrogates the policy dimensions and practitioner perspectives towards a digitally enabled circular plastic economy.Written for a wide range of readers across academia, policy and practice, including researchers, students, small and medium enterprises (SMEs), digital entrepreneurs, non-governmental organisations (NGOs) and multilateral agencies, policymakers and public officials, this book offers unique insights into complex, multilayered issues relating to the production and management of plastic waste and highlights how digital innovations can drive the transition to the circular plastic economy in Africa.The Open Access version of this book, available at http://www.taylorfrancis.com, has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives (CC-BY-NC-ND) 4.0 license.

This book is aimed at managerial decision-makers, practitioners in any field, and the academic community. The chapter authors have integrated theory with evidence-based practice to go beyond merely explaining cybersecurity topics.

This book is aimed at managerial decision-makers, practitioners in any field, and the academic community. The chapter authors have integrated theory with evidence-based practice to go beyond merely explaining cybersecurity topics.

This book provides a reference point for the development of Building Information Modelling (BIM) maturity in the developing country context. Developing countries have been observed to have low BIM maturity and are struggling to adopt the technology amidst no clearly defined pathways for achieving BIM capability maturity. The research presented in this book provides construction industry stakeholders in developing countries with a framework and nomological map to aid in the advancement of BIM implementation. This work provides a pathway for overcoming the challenges inhibiting BIM maturity in developing countries and ultimately its diffusion in order to harness the benefits. The authors provide critical theoretical insights on BIM maturity in the developing country context, a comparative analysis of BIM maturity in both developing and developed countries, and finally, a conceptualisation of BIM maturity for developing countries. The book is unique as its construct is rooted in the state-of-the-art information management standards in the digitalisation era in the construction industry (ISO 19650). The book delivers a theoretical reference point to the academic and research community and for the industry stakeholder, an essential guide to achieving BIM maturity at macro and micro levels.