This book presents fabrication approaches that could be adapted for the high-throughput and low-cost manufacturing of the proposed transparent electrode. It proposes and demonstrates a new type of embedded metal-mesh transparent electrode (EMTE) that offers superior electrical, optical, and mechanical properties. The structure of the EMTE allows thick metal mesh to be used (for high conductivity) without sacrificing surface smoothness. In addition, the embedded structure improves the EMTE's mechanical stability under high bending stress, as well as its chemical stability in ambient environments. These design aspects are then shown to be suitable for larger electrode areas, narrower metal-mesh line widths, and a wide range of materials, and can easily be adapted to produce flexible and even stretchable devices. In closing, the book explores the practical applications of EMTEs in flexible bifacial dye-sensitized solar cells and transparent thin-film heaters, demonstrating their outstanding performance.

We are in an era of high volatility and uncertain outcomes, driven by accelerating technologies, shortened product cycles, fast-changing information, an increasingly mobile workforce, more demanding customers, complex financial markets, ad-hoc public policies, and many other factors that add layers of uncertainty to all future possibilities. While most believe that good management requires better prediction of the future and better planning, Gill Eapen instead contends that the best way to manage effectively in an uncertain world is through the conscious application of flexibility - an ability to absorb constantly shifting variables and adapt quickly. Flexibility: Flexible Companies for the Uncertain World explores ways in which organizations can systematically enhance their ability to survive and succeed without the guarantees that come with certainty. In these pages, Eapen details: Specific attributes of status-quo organizations that hinder their capacity for flexibility in their three primary components: structure, systems, and strategies A tool and process for diagnosing flexibility-related problems within an organization Specific actions companies can take to improve flexibility, regardless of their size or age A case study of a technology company progressively losing flexibility due to management actions, as well as a detailed project plan for remedial actions Based on the author's years of experience working with a variety of industries, including life sciences, energy, technology, financial services, and manufacturing, and his expertise in decision options, Flexibility offers a holistic alternative approach for managing risk and making the best decisions possible in these especially uncertain times.

This book is aimed at manufacturing and planning managers who struggle to bring a greater degree of stability and more effective use of assets to their operations, not realizing the degree to which production scheduling affects those objectives. It has been reported that 75% of the problems on the manufacturing floor are caused by activities outside the plant floor. Poor production scheduling strategies and systems are often the biggest contributors to the 75%. The book explains in detail that no scheduling strategy, and especially no transition to a different and better scheduling strategy, will succeed without strong commitment and guidance from senior leadership. Leadership must understand their active role in the transition, that people will feel uncomfortable and even threatened by change, and that they will need to be measured by different standards. Effective scheduling requires that following the schedule and production to plan is more important than trying to maximize each day's throughput. The book explains the advantages of a structured, regularly repeating schedule: how it can increase throughput, right-size inventory based on cycles and variabilities and therefore make it more usable, and improve customer delivery. It will explain the trade-offs between throughput, inventory, and delivery performance, how those trade-offs are actually decided in production scheduling, and how an appropriate scheduling strategy can make the trade-offs and their ramifications visible. It discusses several popular structured scheduling concepts, their similarities, and differences, to allow the readers to decide which might fit best in their environments. In addition, the authors discuss what makes an appropriate scheduling software system, and why a package designed for structured scheduling offers capabilities well beyond the Excel workbooks used by many companies, and how it offers much more design capability and ease of use than the finite scheduling modules in SAP or Oracle. Finally, the authors offer a proven roadmap for implementation, critical success factors necessary to achieve the full potential, and give examples of operations that have done this well. In addition, a guide for leaders and managers post-implementation is provided to help them fully exploit the advantages of a structured, repeating scheduling strategy.

This book is aimed at manufacturing and planning managers who struggle to bring a greater degree of stability and more effective use of assets to their operations, not realizing the degree to which production scheduling affects those objectives. It has been reported that 75% of the problems on the manufacturing floor are caused by activities outside the plant floor. Poor production scheduling strategies and systems are often the biggest contributors to the 75%. The book explains in detail that no scheduling strategy, and especially no transition to a different and better scheduling strategy, will succeed without strong commitment and guidance from senior leadership. Leadership must understand their active role in the transition, that people will feel uncomfortable and even threatened by change, and that they will need to be measured by different standards. Effective scheduling requires that following the schedule and production to plan is more important than trying to maximize each day's throughput. The book explains the advantages of a structured, regularly repeating schedule: how it can increase throughput, right-size inventory based on cycles and variabilities and therefore make it more usable, and improve customer delivery. It will explain the trade-offs between throughput, inventory, and delivery performance, how those trade-offs are actually decided in production scheduling, and how an appropriate scheduling strategy can make the trade-offs and their ramifications visible. It discusses several popular structured scheduling concepts, their similarities, and differences, to allow the readers to decide which might fit best in their environments. In addition, the authors discuss what makes an appropriate scheduling software system, and why a package designed for structured scheduling offers capabilities well beyond the Excel workbooks used by many companies, and how it offers much more design capability and ease of use than the finite scheduling modules in SAP or Oracle. Finally, the authors offer a proven roadmap for implementation, critical success factors necessary to achieve the full potential, and give examples of operations that have done this well. In addition, a guide for leaders and managers post-implementation is provided to help them fully exploit the advantages of a structured, repeating scheduling strategy.

Have you ever puzzled over how to perform Boolean logic at the atomic scale? Or wondered how you can carry out more general calculations in one single molecule or using a surface dangling bond atomic scale circuit? This volume gives you an update on the design of single molecule devices, such as recitfiers, switches and transistors, more advanced semi-classical and quantum boolean gates integrated in a single molecule or constructed atom by atom on a passivated semi-conductor surface and describes their interconnections with adapted nano-scale wiring. The main contributors to the field of single molecule logic gates and surface dangling bond atomic scale circuits theory and design, were brought together for the first time to contribute on topics such as molecule circuits, surface dangling bond circuits, quantum controlled logic gates and molecular qubits. Contributions in this volume originate from the Barcelona workshop of the AtMol conference series, held from January 12-13 2012.

The 3rd Annual International Conference on Design, Manufacturing and Mechatronics (ICDMM2016) was successfully held in Wuhan, China in 2016.The ICDMM2016 covers a wide range of fundamental studies, technical innovations and industrial applications in industry design, manufacturing and mechatronics. The ICDMM2016 program consists of 4 keynote speeches, 96 oral and poster presentations. We were pleased to have more than 80 participants from China, South Korea, Taiwan, Japan, Malaysia, and Saudi Arabia. However, finally, only 83 articles were selected after peer review to be included in this proceedings.

Additive Manufacturing (AM), popularly known as 3D printing, is playing an increasingly significant role in the manufacturing arena. AM has revolutionized how prototypes are to be made and small batch manufacturing should be carried out. Due to high flexibility and high efficiency of lasers, laser-assisted Manufacturing (LAM) and AM technologies are recently getting much attention over traditional methods.This textbook is a timely information resource for undergraduates, postgraduates and researchers who are interested in this emerging technology. The book will cover the basics of lasers, optics and materials used for manufacturing and 3D printing. It will also include several case studies for readers to apply their understanding of the topics, provide sufficient theoretical background and insights to today's key laser-assisted AM processes and conclude with the future prospects of this exciting technology.This is the first textbook tailored specifically for Lasers in 3D Printing and Manufacturing with detailed explanations. The book will focus on laser-assisted 3D printing and Additive Manufacturing (AM) from basic principles of lasers, optics and AM materials to advanced AM technologies, including in-depth discussion on critical aspects throughout the laser-assisted AM processes, such as optical system design, laser-material interaction and laser parameters' optimization.

This book will address key organizational issues that must be considered and addressed when implementing Lean business practices. The book offers solutions for many of the challenges, provides a resource that leaders can use in addressing cultural and regulatory issues, provides means to address the associated people issues and the challenging task of knowledge retention and succession planning. Vignettes are used to illustrate and provide examples of potential issues and solutions that can be considered for resolving issues and a case study demonstrating ways to address the technical and people aspects of implementing Lean to ensure project success.

Reliability Centered Maintenance - Reengineered: Practical Optimization of the RCM Process with RCM-R (R) provides an optimized approach to a well-established and highly successful method used for determining failure management policies for physical assets. It makes the original method that was developed to enhance flight safety far more useful in a broad range of industries where asset criticality ranges from high to low. RCM-R (R) is focused on the science of failures and what must be done to enable long-term sustainably reliable operations. If used correctly, RCM-R (R) is the first step in delivering fewer breakdowns, more productive capacity, lower costs, safer operations and improved environmental performance. Maintenance has a huge impact on most businesses whether its presence is felt or not. RCM-R (R) ensures that the right work is done to guarantee there are as few nasty surprises as possible that can harm the business in any way. RCM-R (R) was developed to leverage on RCM's original success at delivering that effectiveness while addressing the concerns of the industrial market. RCM-R (R) addresses the RCM method and shortfalls in its application -- It modifies the method to consider asset and even failure mode criticality so that rigor is applied only where it is truly needed. It removes (within reason) the sources of concern about RCM being overly rigorous and too labor intensive without compromising on its ability to deliver a tailored failure management program for physical assets sensitive to their operational context and application. RCM-R (R) also provides its practitioners with standard based guidance for determining meaningful failure modes and causes facilitating their analysis for optimum outcome. Includes extensive review of the well proven RCM method and what is needed to make it successful in the industrial environment Links important elements of the RCM method with relevant International Standards for risk management and failure management Enhances RCM with increased emphasis on statistical analysis, bringing it squarely into the realm of Evidence Based Asset Management Includes extensive, experience based advice on implementing and sustaining RCM based failure management programs

Additive Manufacturing (AM), popularly known as 3D printing, is playing an increasingly significant role in the manufacturing arena. AM has revolutionized how prototypes are to be made and small batch manufacturing should be carried out. Due to high flexibility and high efficiency of lasers, laser-assisted Manufacturing (LAM) and AM technologies are recently getting much attention over traditional methods.This textbook is a timely information resource for undergraduates, postgraduates and researchers who are interested in this emerging technology. The book will cover the basics of lasers, optics and materials used for manufacturing and 3D printing. It will also include several case studies for readers to apply their understanding of the topics, provide sufficient theoretical background and insights to today's key laser-assisted AM processes and conclude with the future prospects of this exciting technology.This is the first textbook tailored specifically for Lasers in 3D Printing and Manufacturing with detailed explanations. The book will focus on laser-assisted 3D printing and Additive Manufacturing (AM) from basic principles of lasers, optics and AM materials to advanced AM technologies, including in-depth discussion on critical aspects throughout the laser-assisted AM processes, such as optical system design, laser-material interaction and laser parameters' optimization.

For all the interest that wireless sensor networks have created over the past decade, there are few examples to show that they are truly delivering on this promise and anticipation. What is missing? Deviating from the usual focus on routing and energy efficiency, Building Sensor Networks: From Design to Applications attempts to stitch together the path from conceptual development of applications, on one end, to actual complete applications at the other. With this change in perspective, the book examines important facets of wireless sensor networks (WSNs) that are not often discussed in the literature. From Design Practices to the Networking Protocols that Glue Applications Together Organized into three sections, the book presents insights from international experts representing both industry and academia. The first section, on design practices, explores alternative ways to approach the tasks of developing a suitable WSN solution to an application and assisting that development in a manner that is not necessarily tied to a particular application. The second section, on networking protocols, illustrates the impact of the intermediaries-the "glue" of putting applications together. Chapters look at ways to address traffic, delays in network clustering, and the coexistence of a WSN with other systems on a frequency band. The final section of the book delves into experiences with applications in chemical sensing, defense, global trade and security, and ecosystem monitoring. Although these applications may fail the purist definition of an ideal WSN, they offer valuable lessons for the future development and deployment of WSNs. Challenge Your Thinking about Designing WSN Applications Emphasizing the need to build applications, the contributors present examples of what applications of WSNs could look like and identify the constraints. Throughout, the book challenges and illuminates your thinking about how to tame the complexity of designing a WSN application. It is essential reading for anyone interested in future wireless technologies.

Additive Manufacturing (AM) technologies are developing impressively and are expected to bring about the next revolution. AM is gradually replacing traditional manufacturing methods in some applications because of its unique properties of customisability and versatility. This book provides a very comprehensive and updated text about different types of AM technologies, their respective advantages, shortcomings and potential applications.3D Printing and Additive Manufacturing: Principles and Applications is a comprehensive textbook that takes readers inside the world of additive manufacturing. This book introduces the different types of AM technologies, categorised by liquid, solid and powder-based AM systems, the common standards, the trends in the field and many more.Easy to understand, this book is a good introduction to anyone interested in obtaining a better understanding of AM. For people working in the industry, this book will provide information on new methods and practices, as well as recent research and development in the field. For professional readers, this book provides a comprehensive guide to distinguish between the different technologies, and will help them make better decisions regarding which technology they should use. For the general public, this book sheds some light on the fast-moving AM field.In this edition, new AM standards (e.g. Standard of Terminology and Classification of AM systems) and format standards will be included, Furthermore, the listing of new machines and systems, materials, and software; as well as new case studies and applications in industries that have recently adopted AM (such as the Marine and Offshore industry) have also been incorporated.

Additive Manufacturing (AM) technologies are developing impressively and are expected to bring about the next revolution. AM is gradually replacing traditional manufacturing methods in some applications because of its unique properties of customisability and versatility. This book provides a very comprehensive and updated text about different types of AM technologies, their respective advantages, shortcomings and potential applications.3D Printing and Additive Manufacturing: Principles and Applications is a comprehensive textbook that takes readers inside the world of additive manufacturing. This book introduces the different types of AM technologies, categorised by liquid, solid and powder-based AM systems, the common standards, the trends in the field and many more.Easy to understand, this book is a good introduction to anyone interested in obtaining a better understanding of AM. For people working in the industry, this book will provide information on new methods and practices, as well as recent research and development in the field. For professional readers, this book provides a comprehensive guide to distinguish between the different technologies, and will help them make better decisions regarding which technology they should use. For the general public, this book sheds some light on the fast-moving AM field.In this edition, new AM standards (e.g. Standard of Terminology and Classification of AM systems) and format standards will be included, Furthermore, the listing of new machines and systems, materials, and software; as well as new case studies and applications in industries that have recently adopted AM (such as the Marine and Offshore industry) have also been incorporated.

This book proposes a thorough introduction for a varied audience. The reader will master London theory and the Pippard equations, and go on to understand type I and type II superconductors (their thermodynamics, magnetic properties, vortex dynamics, current transport...), Cooper pairs and the results of BCS theory. By studying coherence and flux quantization he or she will be lead to the Josephson effect which, with the SQUID, is a good example of the applications. The reader can make up for any gaps in his knowledge with the use of the appendices, follow the logic behind each model, and assimilate completely the underlying concepts. Approximately 250 illustrations help in developing a thorough understanding. This volume is aimed towards masters and doctoral students, as well as advanced undergraduates, teachers and researchers at all levels coming from a broad range of subjects (chemistry, physics, mechanical and electrical engineering, materials science...). Engineers working in industry will have a useful introduction to other more applied or specialized material. Philippe Mangin is emeritus professor of physics at Mines Nancy Graduate School of Science, Engineering and Management of the University of Lorraine, and researcher at the Jean Lamour Institute in France. He is the former director of both the French neutron scattering facility, Leon Brillouin Laboratory in Orsay, and the Material Physics Laboratory in Nancy, and has taught superconductivity to a broad audience, in particular to engineering students. Remi Kahn is a retired senior research scientist of the French Alternative Energies and Atomic Energy Commission (CEA-Saclay). He worked at the Leon Brillouin Laboratory and was in charge of the experimental areas of INB 101 (the Orphee research reactor). This work responded to the need to bring an accessible account suitable for a wide spectrum of scientists and engineers.

The best-selling Distributed Sensor Networks became the definitive guide to understanding this far-reaching technology. Preserving the excellence and accessibility of its predecessor, Distributed Sensor Networks, Second Edition once again provides all the fundamentals and applications in one complete, self-contained source. Ideal as a tutorial for students or as research material for engineers, the book gives readers up-to-date, practical insight on all aspects of the field. Revised and expanded, this second edition incorporates contributions from many veterans of the DARPA ISO SENSIT program as well as new material from distinguished researchers in the field. Image and Sensor Signal Processing focuses on software issues and the history and future of sensor networks. The book also covers information fusion and power management. Readers of this book may also be interested in Distributed Sensor Networks, Second Edition: Sensor Networking and Applications (ISBN: 9781439862872).

This handbook focuses on the entire development process of biomedical microsystems that promote special interactions with cells. Fundamentals of cell biology and mechanobiology are described as necessary preparatory input for design tasks. Advanced design, simulation, and micro/nanomanufacturing resources, whose combined use enables the development of biomedical microsystems capable of interacting at a cellular level, are covered in depth. A detailed series of chapters is then devoted to applications based on microsystems that offer enhanced cellular control, including microfluidic devices for diagnosis and therapy, cell-based sensors and actuators (smart biodevices), microstructured prostheses for improvement of biocompatibility, microstructured and microtextured cell culture matrices for promotion of cell growth and differentiation, electrophoretic microsystems for study of cell mechanics, microstructured and microtextured biodevices for study of cell adhesion and dynamics, and biomimetic microsystems (including organs-on-chips), among others. Challenges relating to the development of reliable in vitro biomimetic microsystems, the design and manufacture of complex geometries, and biofabrication are also discussed.

Just because a problem is invisible doesn't mean it's not affecting your operation. While communication, distance, and culture are often ignored as real threats to your results, these unnoticed forces are negatively affecting companies that operate internationally. Globalization has amplified a series of obstacles we not have paid enough attention to in our organizations. Ultimately, it's humans that solve problems in coordination with other humans, and this requires excellent communication. Currently, people must coordinate actions and collaborate with teams sitting in geographically separated places. Misunderstandings and lack of clarity, however, cause high, unbudgeted costs. Global Lean: Seeing the New Waste Rooted in Communication, Distance, and Culture highlights the waste created by these interactions and adopts Lean thinking to provide methods, approaches, and real case studies to eliminate these problems at the source. As organizations evolve into global networks, Lean initiatives must now meet new needs. The book follows the story of a CEO and his company that, while successful in their local environment, are heavily impacted by new obstacles as they expand internationally. It illustrates how they adopt Lean methodologies to bring hidden problems to the surface.

At the start of the Industrial Revolution, it appeared that most scientific instruments were made and sold in London, but by the time of the Great Exhibition in 1851, a number of provincial firms had the self-confidence to exhibit their products in London to an international audience. How had this change come about, and why? This book looks at the four main, and two lesser, English centres known for instrument production outside the capital: Birmingham, Liverpool, Manchester and Sheffield, along with the older population centres in Bristol and York. Making wide use of new sources, Dr Morrison-Low, curator of history of science at the National Museums of Scotland, charts the growth of these centres and provides a characterisation of their products. New information is provided on aspects of the trade, especially marketing techniques, sources of materials, tools and customer relationships. From contemporary evidence, she argues that the principal output of the provincial trade (with some notable exceptions) must have been into the London marketplace, anonymously, and at the cheaper end of the market. She also discusses the structure and organization of the provincial trade, and looks at the impact of new technology imported from other closely-allied trades. By virtue of its approach and subject matter the book considers aspects of economic and business history, gender and the family, the history of science and technology, material culture, and patterns of migration. It contains a myriad of stories of families and firms, of entrepreneurs and customers, and of organizations and arms of government. In bringing together this wide range of interests, Dr Morrison-Low enables us to appreciate how central the making, selling and distribution of scientific instruments was for the Industrial Revolution.

There are many books available covering the Training Within Industry (TWI) programs, but few include any unique material on adaptation or modification - This dearth of new has caused practitioners to alter the programs without understanding the underlying principles. These changes have made the programs less effective. One must, however, maintain the principles used in the programs when changing the delivery of the programs to suit the culture. The purpose of The TWI Facilitator's Guide: How to Use the TWI Programs Successfully is to prevent the TWI programs from falling into misuse and disuse. This book will explain the main principles of the TWI programs and what they can accomplish, but it will also stress what they are not. This book reviews what the programs are and then explains how to use them. It tells why we do certain aspects of each program. When we know why we do something, we won't stop doing it for the wrong reason.

Si usted quiere entender como se origino el sistema de producci?n Toyota y por que tiene exito, debe leer este libro. Aqui encontrara una introducci?n avanzada del justo a tiempo. El mundo le debe mucho a Taiichi Ohno. Nos ha demostrado como fbricar con mayor eficacia, como reducir costos, como producir una mayor calidad, y a examinar atentamente como nosotros, en nuestra calidad de seres humanos, trabajamos en una fbrica. El relato que Ohno cuenta en este libro es brillante. Deberia ser leido por todos los gerentes. No es solo un relato acerca de la fabricaci?n; sino tambien sobre como dirigir exitosamente una empresa.

This text provides an in-depth appraisal of the key environmental issues for packaging and how these considerations are increasingly affecting trends and developments in the packaging industry. It is aimed at all those concerned with the manufacture, use and distribution of packaging, including raw materials suppliers, packaging convertors, fillers, packers and retailers. In particular, it should be helpful to all management - commerical, technical or those concerned with human resources. It will also be of interest to those involved in the management of waste - local governments, waste management organizations and materials recyclers.

3D Printing for Product Designers closes the gap between the rhetoric of 3D printing in manufacturing and the reality for product designers. It provides practical strategies to support the adoption and integration of 3D printing into professional practice. 3D printing has evolved over the last decade into a practical proposition for manufacturing, opening up innovative opportunities for product designers. From its foundations in rapid prototyping, additive manufacturing has developed into a range of technologies suitable for end-use products. This book shows you how to evaluate and sensitively understand people, process, and products and demonstrates how solutions for working with additive manufacturing can be developed in context. It includes a practical, step-by-step plan for product designers and CEOs aimed at supporting the successful implementation of 3D printing by stakeholders at all levels of a manufacturing facility, tailored to their stage of technology integration and business readiness. It features a wide range of real-world examples of practice illustrated in full colour, across industries such as healthcare, construction, and film, aligning with the strategic approach outlined in the book. The book can be followed chronologically to guide you to transform your process for a company, to meet the unique needs of a specific client, or to be used as a starting point for the product design entrepreneur. Written by experienced industry professionals and academics, this is a fundamental reference for product designers, industrial designers, design engineers, CEOs, consultants, and makers.

This book features a wonderful collection of clock projects from the editors of "Scroll Saw Woodworking & Crafts" magazine. Learn how to make beautiful time pieces including grandfather clocks and pendulum clocks! It includes projects for all abilities and tastes, from learning to cut pieces and assemble parts to finishing and personalising. The editors of "Scroll Saw Woodworking & Crafts" magazine have selected a collection of the most beloved clock projects - from fancy fretwork grandfather clocks to classic pendulum clocks and whimsical desk clocks. This book offers something for everyone - no matter what their level of scrolling expertise. Beginners will learn how to cut their pieces like an expert and assemble clock parts. More advanced crafters will appreciate the section on finishing clocks and personalising special gifts. The articles, that represent the most popular clocks since the inception of "Scroll Saw Woodworking & Crafts" in 2000, have been fully updated to reflect current clock part sizes.

This volume summarizes the state-of-the-art technologies, key advances and future trends in the field of label-free biosensing. It provides detailed insights into the different types of solid-state, label-free biosensors, their underlying transducer principles, advanced materials utilized, device-fabrication techniques and various applications. The book offers graduate students, academic researchers, and industry professionals a comprehensive source of information on all facets of label-free biosensing and the future trends in this flourishing field. Highlights of the subjects covered include label-free biosensing with: * semiconductor field-effect devices such as nanomaterial-modified capacitive electrolyte-insulator-semiconductor structures, silicon nanowire transistors, III-nitride semiconductor devices and light-addressable potentiometric sensors * impedimetric biosensors using planar and 3D electrodes * nanocavity and solid-state nanopore devices * carbon nanotube and graphene/graphene oxide biosensors * electrochemical biosensors using molecularly imprinted polymers * biomimetic sensors based on acoustic signal transduction * enzyme logic systems and digital biosensors based on the biocomputing concept * heat-transfer as a novel transducer principle * ultrasensitive surface plasmon resonance biosensors * magnetic biosensors and magnetic imaging devices

"Wave Propagation in Nanostructures "describes the fundamental and advanced concepts of waves propagating in structures that have dimensions of the order of nanometers. The book is fundamentally based on non-local elasticity theory, which includes scale effects in the continuum model. The book predominantly addresses wave behavior in carbon nanotubes and Graphene structures, although the methods of analysis provided in this text are equally applicable to other nanostructures.

The book takes the reader from the fundamentals of wave propagation in nanotubes to more advanced topics such as rotating nanotubes, coupled nanotubes, and nanotubes with magnetic field and surface effects. The first few chapters cover the basics of wave propagation, different modeling schemes for nanostructures and introduce non-local elasticity theories, which form the building blocks for understanding the material provided in later chapters. A number of interesting examples are provided to illustrate the important features of wave behavior in these low dimensional structures.