Große Auswahl an günstigen Büchern
Schnelle Lieferung per Post und DHL

Bücher veröffentlicht von CRC Press

Filter
Filter
Ordnen nachSortieren Beliebt
  • von Sunil K Deshmukh
    241,00 €

    This book provides examples applications of nanotechnology in addressing problems and challenges in agriculture as well as environmental sciences and provides an overview of innovations in nanopesticides, nanofertilizers, bionanosensors and nano-based delivery system for improving different aspects of plant productivity including pre-harvest and post-harvest strategies as well detection of contaminants that could be useful for enhancing soil health. Recycling of agricultural waste to beneficial products using nanotechnologies; bionanosensors; fate of nanomaterials and the ecological consequences of their delivery into the environment; safety and nanotoxicity issues are other topics being dealt with in this book. Chapters have been written by internationally recognized researchers and experts with special reference to the innovations and latest developments in the mentioned areas of nanobiotechnology that have applications and commercial importance, especially for crop fields and post-harvest management.Despite the research and development used to promote the use of nanotechnology in agriculture and the environmental, knowledge gaps and uncertainties about how to fill the gaps are more prevalent than scientific certainties about the public health and environmental effects of nanomaterials. The book thus addresses the issue of toxicity of nanomaterials in agricultural nanotechnology products. The book will be useful for active researchers and scientists in the agricultural sector, academia as well as industry, including nanotechnologists, plant pathologists, agronomists, agrochemists, environmental technologists and all scientists working for sustainability in agriculture. The book will encourage future and active researchers and scientists in the agriculture sector, academia as well as industry.

  • von James L. Hayward & Shandelle M. Henson
    106,00 - 239,00 €

  • von Zhe Chuan Feng
    238,00 €

    This handbook presents the key properties of silicon carbide (SiC), the power semiconductor for the 21st century. It describes related technologies, reports the rapid developments and achievements in recent years, and discusses the remaining challenging issues in the field.The book consists of 15 chapters, beginning with a chapter by Professor W. J. Choyke, the leading authority in the field, and is divided into four sections. The topics include presolar SiC history, vapor-liquid-solid growth, spectroscopic investigations of 3C-SiC/Si, developments and challenges in the 21st century; CVD principles and techniques, homoepitaxy of 4H-SiC, cubic SiC grown on 4H-SiC, SiC thermal oxidation processes and MOS interface, Raman scattering, NIR luminescent studies, Mueller matrix ellipsometry, Raman microscopy and imaging, 4H-SiC UV photodiodes, radiation detectors, and short wavelength and synchrotron X-ray diffraction.This comprehensive work provides a strong contribution to the engineering, materials, and basic science knowledge of the 21st century, and will be of interest to material growers, designers, engineers, scientists, postgraduate students, and entrepreneurs.

  • von Manoj Kumar Ghosal
    226,00 €

    This book focusses on various options of taking up ventures for starting entrepreneurship in small/large scale in the field of renewable energy technologies. The book covers the fundamentals of entrepreneurship, renewable energy resources, their technologies involved and applications along with financial evaluations. The book will cater to the needs of students, researchers, various stakeholders, entrepreneurs etc. by providing valuable information on renewable energy technologies and their applications in developing entrepreneurship and establishing enterprise at individual level, specifically focusing on low carbon technology for sustenance of environment which is becoming increasingly important.Note: Taylor and Francis does not sell or distribute the print editions of this title in India, Pakistan, Nepal, Bhutan, Bangladesh and Sri Lanka.

  • von Ram K Gupta
    225,00 €

    Low-dimensional magnetic materials find their wide applications in many areas, including spintronics, memory devices, catalysis, biomedical, sensors, electromagnetic shielding, aerospace, and energy. This book provides a comprehensive discussion on magnetic nanomaterials for emerging applications.Fundamentals along with applications of low-dimensional magnetic materials in spintronics, catalysis, memory, biomedicals, toxic waste removal, aerospace, telecommunications, batteries, supercapacitors, flexible electronics, and many more are covered in detail to provide a full spectrum of their advanced applications.This book offers fresh aspects of nanomagnetic materials and innovative directions to scientists, researchers, and students. It will be of particular interest to materials scientists, engineers, physicists, chemists, and researchers in electronic and spintronic industries, and is suitable as a textbook for undergraduate and graduate studies.

  • von Ajit S Narang
    295,00 €

    Continuous manufacturing of pharmaceuticals, including aspects of modern process development is highlighted in this book with both the 'why' and the 'how', emphasizing process modeling and process analytical technologies. Presenting specific case studies and drawing upon extensive experience from industry and academic opinion leaders, this book focuses on the practical aspects of continuous manufacturing. It gives the readers the strategic perspective and technical depth needed to adopt and implement these technologies, where appropriate, in order to gain the competitive edge in speed, agility, and reliability.Features:Discusses scientific solutions and process analytical technology to enable continuous manufacturing in the development of new drugsIncludes short stories about how some companies have adopted CM and what their drivers were and what benefits were realizedAddresses economic and practical considerations, unlike many other technical booksEmphasizes the practical aspects to give the reader the strategic imperative and technological depth to adopt and implement these technologiesHighlights the "why" and the "how", focusing on the need analysis and process modeling and process analytical technologies

  • von Vijay Yadav Tokala
    110,00 €

    Global food losses are a result of a lack of necessary infrastructure, improper food safety handling procedures, and insufficient training for the personnel working in the cold chain. The development of a resource-efficient and energy-smart food supply chain requires a well-integrated evaluation and development of the cold chain. Cold Chain Management for the Fresh Produce Industry in the Developing World provides a comprehensive review of the benefits of an unbroken cold chain in developing countries and focuses on the critical role of extension education in the implementation of cold chain management. The unbroken cold chain is essential for all stakeholders in the fresh produce industry to maintain the quality and safety of food products during handling, transporting, and storing in their journey from producer to consumer. Appropriate cold chain management is crucial not only to reduce the postharvest losses and wastages, but also to increase farmers' income, generate employment opportunities, and improve the livelihood of stakeholders along the supply chain. Key Features:Includes case studies for promoting the expansion of existing technologies for cold chain development in Asian, Africa and the Caribbean nations.Assesses cold chain management as crucial to the growth of global trade in perishable products with contributions from international organizations, researchers and commercial experts.Articulates resilient, sustainable and creative concepts to develop cold chains to enhance food distribution.This book comprises of chapters contributed by the experts and practitioners of cold chain development in developing countries. The authors in the book provide the scenario of cold chain management in the world and discuss the importance of the cold chain as well as the different options and innovations of cooling systems. Chapters also include case studies, success stories, capacity building activities, and other opportunities in cold chain development.a a

  • von Kristian Stromgaard
    118,00 €

    Building on the success of the previous editions, the Textbook of Drug Design and Discovery, Fifth Edition, has been thoroughly revised and updated to provide a complete source of information on all facets of drug design and discovery for students of chemistry, pharmacy, pharmacology, biochemistry, and medicine. The information is presented in an up-to-date review form with an underlying and fundamental focus on the educational aspects.Beginning with an introduction to drug design and discovery, the first eight chapters cover molecular recognition, ligand-based drug design, and biostructure-based drug design. The authors also discuss drug-like properties and decision making in medicinal chemistry, chemical biology, natural products in drug discovery, and in vivo imaging in drug discovery.The middle six chapters provide an overview of peptide and protein drug design, prodrugs in drug design and development, and enzyme inhibitors. The authors also go through receptors (structure, function, and pharmacology), ion channels (structure and function), and neurotransmitter transporters (structure, function, and drug binding).The following chapters address important neurotransmitter systems, GABA and glutamic acid receptors and transporter ligands, acetylcholine, histamine, dopamine and serotonin, and opioid and cannabinoid receptors. The book concludes with an examination of neglected diseases, anticancer agents, tyrosine kinase receptors, and antibiotics.

  • von Sheetal S Zalte-Gaikwad
    226,00 €

    The idea behind this book is to simplify the journey of aspiring readers and researchers to understand the convergence of Big Data with the Cloud. This book presents the latest information on the adaptation and implementation of Big Data technologies in various cloud domains and Industry 4.0.Synergistic Interaction of Big Data with Cloud Computing for Industry 4.0 discusses how to develop adaptive, robust, scalable, and reliable applications that can be used in solutions for day-to-day problems. It focuses on the two frontiers - Big Data and Cloud Computing - and reviews the advantages and consequences of utilizing Cloud Computing to tackle Big Data issues within the manufacturing and production sector as part of Industry 4.0. The book unites some of the top Big Data experts throughout the world who contribute their knowledge and expertise on the different aspects, approaches, and concepts related to new technologies and novel findings. Based on the latest technologies, the book offers case studies and covers the major challenges, issues, and advances in Big Data and Cloud Computing for Industry 4.0.By exploring the basic and high-level concepts, this book serves as a guide for those in the industry, while also helping beginners and more advanced learners understand both basic and more complex aspects of the synergy between Big Data and Cloud Computing.

  • von John Wilson & Robert Mather
    295,00 €

  • von P. Basuchaudhuri
    272,00 €

    Peanut is an important crop in the semi-arid regions of the world. Both, irrigation and well water can provide the water necessary for it. It is a nutritious seed nut crop and has manyfold uses. As such, research on this crop is imperative.This book reviews physiological aspects, keeping in mind the changing agroclimatic conditions. Growth, development and yield are described on the basis of cellular and morphological manifestations. Being a C3 plant, the photosynthesis and respiration in peanuts is critically viewed specially under varying environment conditions and genotypes. The study of nitrogen assimilation and biological nitrogen fixation have been presented in light of the prevalent environmental and gene effects. The role of plant growth regulators in peanuts is elaborated on, stating up-to-date mode of actions. Special emphasis has been given to mechanisms of abiotic stress effects. The chapters (13) are arranged on the basis of physiology, cellular structure, biochemistry, molecular and genomics concepts.

  • von Sarfaraz K Niazi
    219,00 €

    This book is the most comprehensive and complete treatise on nucleic acid therapeuticproducts, including mRNA vaccines, their manufacturing, formulations, andtesting for safety and efficacy. Details include cGMP-compliant manufacturing andregulatory filing steps. A new concept of "biosimilar" mRNA vaccine is presentedto secure fast approval of copies of mRNA vaccines. Projections of financial plansto establish RNA manufacturing facilities are provided, along with details of supplychain management. Finally, the future of nucleic acid products in gene therapy andother newer applications is presented, along with a perspective that all new vaccineswill be the nucleic acid type that will further provide first-time prevention of autoimmunedisorders. It is projected that both big pharma and start-ups will enter this field,and we can expect significant additions to our drug armamentarium soon.

  • von M Z Naser
    275,00 €

    The design, construction, and upkeep of infrastructure is comprised of a multitude of dimensions spanning a highly complex paradigm of interconnected opportunities and challenges. While traditional methods fall short of adequately accounting for such complexity, artificial intelligence (AI) presents novel and out-of-the-box solutions that effectively tackle the growing demands of our infrastructure. The convergence between AI and civil engineering is an emerging frontier with tremendous potential.The book is likely to provide a boost to the state of infrastructure engineering by fostering a new look at civil engineering that capitalizes on AI as its main driver. It highlights the ongoing push to adopt and leverage AI to realize contemporary, intelligent, safe, and resilient infrastructure. The book comprises interdisciplinary and novel works from across the globe. It presents findings from innovative efforts supplemented with physical tests, numerical simulations, and case studies - all of which can be used as benchmarks to carry out future experiments and/or facilitate the development of future AI models in structural engineering, traffic engineering, construction engineering, and construction materials.The book will serve as a guide for a wide range of audiences, including senior undergraduate and graduate students, professionals, and government officials of civil, traffic, and computer engineering backgrounds, as well as for those engaged in urban planning and human sciences.

  • von Harish Parthasarathy
    230,00 €

    This book covers a variety of problems, and offers solutions to some, in:Statistical state and parameter estimation in nonlinear stochastic dynamical system in both the classical and quantum scenariosPropagation of electromagnetic waves in a plasma as described by the Boltzmann Kinetic Transport EquationClassical and Quantum General RelativityIt will be of use to Engineering undergraduate students interested in analysing the motion of robots subject to random perturbation, and also to research scientists working in Quantum Filtering.

  • von Siska Noviaristanti
    228,00 €

    This book contains 74 selected papers presented at the 5th International Seminar of Contemporary Research on Business and Management (ISCRBM 2021), which was organized by the Alliance of Indonesian Master of Management Program (APMMI) and held in Jakarta, Indonesia on 18 December 2021. This online conference was hosted by the Master of Management Program of Indonesia University. This year, ISCRBM focused on research related to driving sustainable business through innovation. Business has had to deal with the Covid-19 pandemic, so a new approach towards managing business to survive competition is indispensable. Innovation is the key for all organizations in surviving in the new normal and beyond. The Seminar aimed to provide a forum for leading scholars, academics, researchers, and practitioners in the business and management area to reflect on the issues, challenges and opportunities, and to share the latest innovative research and best practices. This seminar brought together participants to exchange ideas on the future development of management disciplines: human resource, marketing, operation, finance, strategic management and entrepreneurship.The Open Access version of this book, available at www.taylorfrancis.com, has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license.

  • von Kyle Walker
    254,00 €

  • von Ajit S Narang
    217,00 €

    Organ Specific Drug Delivery and Targeting to the Lungs provides up to date information on the multidisciplinary field of particle engineering and drug delivery to the lungs, including advancements of nanotechnology. The text presents a unique, pragmatic focus with case studies, that help translate scientific understanding to practical implementation. In addition to highlighting the successful case studies, it also offers practical advice on watchouts, limitations, and 'bookend' boundaries involved in the stages of testing and development.¿Additional Features Include:Provides an account of particle engineering, discovery, biology, development, and delivery in relation with the advancements of nanotechnology, unlike any previous book.Brings together the leading experts and researchers in the field to critically assess and discuss various topics influencing drug delivery.Highlights the interplay of different scientific disciplines and the balance of requirements that are critical to molecule and product design.¿With the strategic focus on what matters during new product development, this book provides a guide to understanding and navigating new drug discovery and development for lung targets.

  • von Seyedeh Leili (Electrical and Computer Engineering dept Mirtaheri & Reza Shahbazian
    242,00 €

  • von James Aweya
    125,00 - 297,00 €

  • von Edgar N Sanchez
    115,00 €

    The book presents recent advances in the theory of neural control for discrete-time nonlinear systems with multiple inputs and multiple outputs. The simulation results that appear in each chapter include rigorous mathematical analyses, based on the Lyapunov approach, to establish its properties. The book contains two sections: the first focuses on the analyses of control techniques; the second is dedicated to illustrating results of real-time applications. It also provides solutions for the output trajectory tracking problem of unknown nonlinear systems based on sliding modes and inverse optimal control scheme."This book on Discrete-time Recurrent Neural Control is unique in the literature, with new knowledge and information about the new technique of recurrent neural control especially for discrete-time systems.The book is well organized and clearly presented. It will be welcome by a wide range of researchers in science and engineering, especially graduate students and junior researchers who want to learn the new notion of recurrent neural control. I believe it will have a good market.It is an excellent book after all."- Guanrong Chen, City University of Hong Kong"This book includes very relevant topics, about neural control. In these days, Artificial Neural Networks have been recovering their relevance and well-stablished importance, this due to its great capacity to process big amounts of data. Artificial Neural Networks development always is related to technological advancements; therefore, it is not a surprise that now we are being witnesses of this new era in Artificial Neural Networks, however most of the developments in this research area only focuses on applicability of the proposed schemes. However, Edgar N. Sanchez author of this book does not lose focus and include both important applications as well as a deep theoretical analysis of Artificial Neural Networks to control discrete-time nonlinear systems. It is important to remark that first, the considered Artificial Neural Networks are development in discrete-time this simplify its implementation in real-time; secondly, the proposed applications ranging from modelling of unknown discrete-time on linear systems to control electrical machines with an emphasize to renewable energy systems. However, its applications are not limited to these kind of systems, due to their theoretical foundation it can be applicable to a large class of nonlinear systems. All of these is supported by the solid research done by the author."- Alma Y. Alanis, University of Guadalajara, Mexico"This book discusses in detail; how neural networks can be used for optimal as well as robust control design. Design of neural network controllers for real time applications such as induction motors, boost converters, inverted pendulum and doubly fed induction generators has also been carried out which gives the book an edge over other similar titles. This book will be an asset for the novice to the experienced ones."- Rajesh Joseph Abraham, Indian Institute of Space Science & Technology, Thiruvananthapuram, India

  • - Distribution Emergency Operation
    von Chee-Wooi Ten & Yachen Tang
    85,00 €

    Reducing power outage time to each customer is essential to the overall distribution reliability. This book provides the fundamentals of emergency operation using a graph-theoretic approach and exploration of the subsystem(s) that address the operational aspects of electrical fault occurrence to determine possible feeder reconfiguration. The localization of a faulted segment within a feeder involves remote-controlled normally open (NO) and normally closed (NC) switches through supervisory control and data acquisition (SCADA) between radially energized, interconnected feeders. Topics cover: (1) Data extraction from geographic information systems (GIS), (2) Graph modeling of distribution feeders, (3) Programming for backward/forward sweeping unbalanced power flow, (4) Short circuit analysis and fault localization, (5) Fault isolation, temporary and full service restoration, (6) Outage management and crew coordination, (7) Trouble call tickets and escalation to search for fault, and (8) Emerging subject of distribution management systems (DMS). FEATURESNovel and practical textbook that will help to understand distribution operation in graph theoryShow how to convert GIS coordinate datasets to graph and how to troubleshoot the geometry errorsExplain how to troubleshoot power flow divergence due to the bad metering datasets and allocation factor (AF) for each load within primary and secondary networksSimilar platform as DMS environment, but the graduate students have their hands-on experience to implement the applications in the MATLAB environmentDetailed modeling in graph theory of distribution feeders and possible reconfiguration to locate power outage

  • - Challenges and Vision
    von Olivier Terzo
    121,00 €

    Heterogeneous Computing Architectures: Challenges and Vision provides an updated vision of the state-of-the-art of heterogeneous computing systems, covering all the aspects related to their design: from the architecture and programming models to hardware/software integration and orchestration to real-time and security requirements. The transitions from multicore processors, GPU computing, and Cloud computing are not separate trends, but aspects of a single trend-mainstream; computers from desktop to smartphones are being permanently transformed into heterogeneous supercomputer clusters. The reader will get an organic perspective of modern heterogeneous systems and their future evolution.

  • von Louis Komzsik
    85,00 €

    Calculus of variations has a long history. Its fundamentals were laid down by icons of mathematics like Euler and Lagrange. It was once heralded as the panacea for all engineering optimization problems by suggesting that allone needed to do was to state a variational problem, apply the appropriate Euler-Lagrange equation and solve the resulting differential equation.This, as most all encompassing solutions, turned out to be not always true and the resulting differential equations are not necessarily easy to solve. On the other hand, many of the differential equations commonly used in various fields of engineering are derived from a variational problem. Hence it is an extremely important topic justifying the new edition of this book.This third edition extends the focus of the book to academia and supports both variational calculus and mathematical modeling classes. The newly added sections, extended explanations, numerous examples and exercises aid the students in learning, the professors in teaching, and the engineers in applying variational concepts.

  • von Menas Kafatos
    51,00 €

    Contents. 1. Past Present Future Exist Simultaneously. Entanglement, Dream Time, PreCognition, Retrocausation, Deja Vu, and Premonitions 2. Synchronicity, Entanglement, Quantum Information and the Psyche 3. Classical Anthropic Everett Model: Indeterminacy in a Preordained Multiverse 4. Quantum Paradoxes: The Uncertainty Principle, Wave Function, Probability, Entanglement, and Multiple Worlds 5. Time Travel Through Black Holes Holes in the Fabric of Space-Time 6. The Nature of Reality, the Self, Time, Space and Experience 7. Perceived Reality, Quantum Mechanics, and Consciousness 8. Space, Time and Consciousness 9. Many Mansions: Special Relativity, Higher-Dimensional Space, Neuroscience, Consciousness and Time 10. Brain, Consciousness, and Causality 11. Time, Altered States of Consciousness, And Neuroscience 12. Consciousness of Continuity of Now 13. The Observer's Now, Past and Future in Physics from a Psycho-Biological Perspective 14. Mental Time Travel: 15. How The Mind Escapes From The Present 16. Mental Time Travel And The Self-Concept 17. Continuity In Hippocampal Function As A Constraint On The Convergent Evolution Of Episodic-Like Cognition 18. The Theory of MindTime

  • von John R Helliwell
    38,00 €

    The first in the Focus Series on Global Science Education, The Whys of a Scientific Life examines why scientists do what they do. Working from a diverse background in scientific research, including academic departments of physics and chemistry, as well as the scientific civil service, the author describes the choices scientists make. Fundamentally, a scientist asks questions based on curiosity. In addition, the environment is very important. By influencing their elected governments, society itself shapes the scientific research that is undertaken by scientists. This book follows on naturally from the author's last book, Skills for a Scientific Life, which is a how-to guide for scientists and those that aspire to engage in science as a career.Key Features:User friendly and concise, this text dissects the whys of science and discoveryThe author has outstanding experience in mentoring science students and staff, and also in outreach activities for the public and students of all ages including schoolsThe final chapter emphasises the joys of the scientist in research

  • von Hamid Jahankhani
    281,00 €

    Social media has spread rapidly on the global stage, driving consumers' attention and influence, both consciously and subconsciously. Whilst this type of platform may have been initially designed as a tool for open communication and expression, it is also being utilized as a digital tool, with widescale use cases. The intelligence explosion, information overload and disinformation play a significant part regarding individual, group and country perceptions. The complex nature of this data explosion created an increasing demand and use of artificial intelligence (AI) and machine learning (ML), to help provide 'big insights' to 'big data'. AI and ML enable the analysis and dissemination of vast amounts of data, however the ungoverned pace at which AI and autonomous systems have been deployed, has created unforeseen problems. Many algorithms and AI systems have been trained on limited or unverified datasets, creating inbuilt and unseen biases. Where these algorithmic tools have been deployed in high impact systems, there are documented occurrences of disastrous decision making and outcomes that have negatively impacted people and communities. Little to no work had been conducted in its vulnerability and ability to exploit AI itself. So, AI and autonomous systems, whilst being a force for societal good, could have the potential to create and exacerbate societies greatest challenges. This is a cohesive volume that addresses challenging problems and presents a range of innovative approaches and discussion.

  • von Suresh Kaushik
    318,00 €

    The book, Nanosensors for Futuristic Smart and Intelligent Healthcare Systems, presents a treatise on nanosensors technology including wearables, implantable devices and wireless tools. The recent pandemic (COVID-19) has changed the behaviour of people towards diagnosis of infectious diseases and monitoring remote patient health status in real-time. The main focus of this book is the basic concepts of nanomaterials and sensing paradigms for medical devices based on nanosensor technology. The book will be valuable to researchers, engineers and scientists interested in the field of healthcare for monitoring health status in real-time.

  • von Steva Levic
    268,00 €

    Food technology has adopted new principles and practices that are rapidly changing the food sector. New foods are now available under more uniform standards and better quality control. Globalised food market offers opportunities for manufacturers to increase production and profit, and at the same time, consumers benefit from the choice of food products like never before. All this is possible only because of the innovations in the food sector. One of such innovations is encapsulation technology, which aims to preserve food quality, enhance the sensorial properties of food and increase the efficiency in food processing. This book discusses the uses of encapsulation technology in food practices and conventional processes and also highlights new directions in food processing. In the introductory chapters' review of encapsulation technologies, carrier materials and criteria for their selection, analytical methods for characterisation of encapsulated products and some aspects of product design and process optimisation. The most important achievements of encapsulation technology in the food sector are reviewed in the later chapters related to encapsulation of food ingredients, food biocatalysts and examples of usage of encapsulated active ingredients in the dairy and meat industry, beverage production, etc. In addition, the implementation of nanotechnology in the food sector is reviewed, emphasizing the most important materials and technologies for the production of nanoencapsulates. The book is a valuable source of information on encapsulation technology, for academia and industry, especially the food sector, with the aim of enhancing knowledge transfer.

  • von Pratibha Dheeran
    281,00 €

    This book, Extremophiles: General and Plant Biomass Based Biorefinery, explores the potential of extremophiles in industries and biomass based biorefinery. The book sheds light on diversity and various applications of thermophiles, psychrophiles, halophiles, alkaliphiles and acidophiles for the production of value-added products including biofuels, extremozymes, etc. The chapters comprehensively emphasize the utility of extremophiles in sustainable biorefinery bioprocesses. This book is an integrated source of literature for scientists, engineers, academicians, and students working in the area of extremophiles, microbial technology and biorefinery.

Willkommen bei den Tales Buchfreunden und -freundinnen

Jetzt zum Newsletter anmelden und tolle Angebote und Anregungen für Ihre nächste Lektüre erhalten.