Conferences related to Diversity methods

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ICC 2015 - 2015 IEEE International Conference on Communications

IEEE ICC is one of the two flagship IEEE conferences in the field of communications; London is to host this conference in 2015. Each annual IEEE ICC conference typically attracts approximately 1,500-2,000 attendees, and will present over 1,000 research works over its duration. As well as being an opportunity to share pioneering research ideas and developments, the conference is also an excellent networking and publicity event, giving the opportunity for businesses and clients to link together, and presenting the scope for companies to publicise themselves and their products among the leaders of communications industries from all over the world.


2013 International Conference onWireless Communications and Signal Processing (WCSP)

WCSP aims to gather International researchers from academia and industry to meet and exchange ideas and recent research works across the broad field of wireless technologies. Potential topics are solicited in, but not limited to the following areas: 1. Communication Theory 2. Wireless Communications 3. Wireless Networking 4. Signal Processing

  • 2012 International Conference on Wireless Communications & Signal Processing (WCSP 2012)

    * Communications Theory * Wireless Communications * Wireless Networking * Signal Processing

  • 2011 International Conference on Wireless Communications & Signal Processing (WCSP 2011)

    The Conference is the premier forum for the presentation of new advances and research results in the fields of theoretical, experimental, and applied Wireless Communications and Signal Processing. The conference aims to bring together leading researchers, scientists, engineers and scholar students in the domain of interest from around the world to exchange and share their experiences, new ideas and results in challenges encountered and solutions adopted.

  • 2010 International Conference on Wireless Communications & Signal Processing (WCSP 2010)

    WCSP 2010 is the premier forum for the presentation of new advances and research results in the fields of theoretical, experimental, and applied Wireless Communications and Signal Processing aims to exchange and share the experiences, new ideas and results in challenges encountered and solutions adopted.

  • 2009 International Conference on Wireless Communications & Signal Processing (WCSP 2009)

    WCSP 2009 is the first international conference on Wireless Communications and Signal Processing. It is planning to be held in Nanjing, China. Nanjing played an important role in these areas. There are a lot of IEEE members, wireless and mobile clients, services providers and producers in Nanjing.



Periodicals related to Diversity methods

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Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Communications Magazine, IEEE

IEEE Communications Magazine was the number three most-cited journal in telecommunications and the number eighteen cited journal in electrical and electronics engineering in 2004, according to the annual Journal Citation Report (2004 edition) published by the Institute for Scientific Information. Read more at http://www.ieee.org/products/citations.html. This magazine covers all areas of communications such as lightwave telecommunications, high-speed data communications, personal communications ...


Communications, IEEE Transactions on

Telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation, including radio; wire; aerial, underground, coaxial, and submarine cables; waveguides, communication satellites, and lasers; in marine, aeronautical, space and fixed station services; repeaters, radio relaying, signal storage, and regeneration; telecommunication error detection and correction; multiplexing and carrier techniques; communication switching systems; data communications; and communication theory. In addition to the above, ...


Vehicular Technology, IEEE Transactions on

IEEE Transactions on Vehicular Technology was one of the most-cited journals, ranking number-six (tying with IEEE Communications Letters) in telecommunications in 2002, according to the annual Journal Citation Report (2002 edition) published by the Institute for Scientific Information. This periodical covers land, airborne, and maritime mobile services; portable or hand-carried and citizens' communications services, when used as an adjunct to ...




Xplore Articles related to Diversity methods

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Distributed trellis coded modulation for multi-source cooperative networks

Renqiu Wang; Wanlun Zhao; G. B. Giannakis 2006 IEEE Radio and Wireless Symposium, 2006

At the expense of spectral efficiency loss, cooperation among users improves error performance by enhancing the diversity provided by slow fading channels. Recently, multi-source cooperation (MSC) has been introduced to improve cooperative diversity and bandwidth efficiency relative to cooperative schemes which rely on repetition coding. The overall code rate of MSC, however, is still less than 1. In this paper ...


Decoding algorithms for space-time orthogonal block codes

B. Farhang-Boroujeny; C. K. Ho Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th, 2003

The decoding of space-time orthogonal block (STOB) codes that have been proposed recently to achieve a diversity gain proportional to multiplication of the number of transmit and receive antennas is studied. We present a matrix formulation for such decoders. This formulation is found useful for efficient implementation of decoders and facilitate analysis. As examples, we use the new formulation to ...


Distributed Space-Time Coded Transmission Achieving Full Cooperative and Multipath Diversities for Asynchronous Cooperative Communications

Zhimeng Zhong; Shihua Zhu; Gangming Lv; Tao Liu Vehicular Technology Conference, 2008. VTC 2008-Fall. IEEE 68th, 2008

In most cooperative communications works, perfect synchronization among relay nodes is assumed in order to achieve cooperative diversity. However, this assumption is not realistic due to the distributed nature of each relay node. In this paper, we propose a new distributed space-time coded transmission (DSTCT) scheme for asynchronous cooperative communications under frequency- selective channels. First, a novel transmission protocol, in ...


Space-Time Block Codes in Nakagami Fading Channels with Non-Identical m-Distributions

Hongzhi Zhao; Yi Gong; Yong Liang Guan; Choi Look Law; Youxi Tang 2007 IEEE Wireless Communications and Networking Conference, 2007

Space-time block codes are known to be a powerful tool to achieve full spatial diversity gain while maintaining a very simple receiver structure. In this paper, the authors analyze the asymptotic error performance of orthogonal space-time block codes over flat Nakagami-m fading channels. Both identical and non-identical m-distributions are considered. Based on the moment generation function (MGF) approach, the closed-form ...


Space-time block codes using square Hankel data blocks

M. D. Zoltowski; M. B. Breinholt Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th, 2001

Since the design by S.M. Alamouti (see IEEE Journal on Selected Areas in Communications, vol.16, no.8, p.1451-8, October 1998) of a simple orthogonal space-time block code that achieves the same diversity order as maximal-ratio receiver combining, there has been a flurry of work to produce similar codes. While Alamouti's scheme cannot be extended to more than two antennas for complex ...


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Educational Resources on Diversity methods

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eLearning

Distributed trellis coded modulation for multi-source cooperative networks

Renqiu Wang; Wanlun Zhao; G. B. Giannakis 2006 IEEE Radio and Wireless Symposium, 2006

At the expense of spectral efficiency loss, cooperation among users improves error performance by enhancing the diversity provided by slow fading channels. Recently, multi-source cooperation (MSC) has been introduced to improve cooperative diversity and bandwidth efficiency relative to cooperative schemes which rely on repetition coding. The overall code rate of MSC, however, is still less than 1. In this paper ...


Decoding algorithms for space-time orthogonal block codes

B. Farhang-Boroujeny; C. K. Ho Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th, 2003

The decoding of space-time orthogonal block (STOB) codes that have been proposed recently to achieve a diversity gain proportional to multiplication of the number of transmit and receive antennas is studied. We present a matrix formulation for such decoders. This formulation is found useful for efficient implementation of decoders and facilitate analysis. As examples, we use the new formulation to ...


Distributed Space-Time Coded Transmission Achieving Full Cooperative and Multipath Diversities for Asynchronous Cooperative Communications

Zhimeng Zhong; Shihua Zhu; Gangming Lv; Tao Liu Vehicular Technology Conference, 2008. VTC 2008-Fall. IEEE 68th, 2008

In most cooperative communications works, perfect synchronization among relay nodes is assumed in order to achieve cooperative diversity. However, this assumption is not realistic due to the distributed nature of each relay node. In this paper, we propose a new distributed space-time coded transmission (DSTCT) scheme for asynchronous cooperative communications under frequency- selective channels. First, a novel transmission protocol, in ...


Space-Time Block Codes in Nakagami Fading Channels with Non-Identical m-Distributions

Hongzhi Zhao; Yi Gong; Yong Liang Guan; Choi Look Law; Youxi Tang 2007 IEEE Wireless Communications and Networking Conference, 2007

Space-time block codes are known to be a powerful tool to achieve full spatial diversity gain while maintaining a very simple receiver structure. In this paper, the authors analyze the asymptotic error performance of orthogonal space-time block codes over flat Nakagami-m fading channels. Both identical and non-identical m-distributions are considered. Based on the moment generation function (MGF) approach, the closed-form ...


Space-time block codes using square Hankel data blocks

M. D. Zoltowski; M. B. Breinholt Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th, 2001

Since the design by S.M. Alamouti (see IEEE Journal on Selected Areas in Communications, vol.16, no.8, p.1451-8, October 1998) of a simple orthogonal space-time block code that achieves the same diversity order as maximal-ratio receiver combining, there has been a flurry of work to produce similar codes. While Alamouti's scheme cannot be extended to more than two antennas for complex ...


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IEEE.tv Videos

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IEEE-USA E-Books

  • No title

    Demographic trends and increasing support costs means that good design for older and disabled people is an economic necessity, as well as a moral imperative. Alan Newell has been described as "a visionary who stretches the imagination of all of us" and "truly ahead of his time." This monograph describes research ranging from developing communication systems for non- speaking and hearing-impaired people to technology to support older people, and addresses the particular challenges older people have with much modern technology. Alan recounts the insights gained from this research journey, and recommends a philosophy, and design practices, to reduce the "Digital Divide" between users of information technology and those who are excluded by the poor design of many current systems. How to create and lead interdisciplinary teams, and the practical and ethical challenges of working in clinically related fields are discussed. The concepts of "Ordinary and Extra-ordinary HCI", "User Sensitive In lusive Design" , and "Design for Dynamic Diversity", and the use of "Creative Design" techniques are suggested as extensions of "User Centered" and "Universal Design." Also described are the use of professional theatre and other methods for raising designers' awareness of the challenges faced by older and disabled people, ways of engaging with these groups, and of ascertaining what they "want" rather than just what they "need." This monograph will give all Human Computer Interaction (HCI) practitioners and designers of both mainstream and specialized IT equipment much food for thought.

  • Diversity

    This chapter discusses diversity. After defining the correlation coefficient between signals, we describe the various types of microdiversity (for combatting small-scale fading): spatial diversity, temporal diversity (or, equivalently, Doppler diversity), frequency diversity (delay diversity), angular diversity (pattern diversity), and polarization diversity. For spatial diversity, the correlation coefficient as a function of angular power spectrum of the signal and antenna spacing is derived. Temporal and frequency diversity needs to be combined with (interleaved) coding or selective retransmission (automatic repeat request, ARQ). Angular diversity can profit from mutual coupling. For large-scale fading, macrodiversity needs to be employed. We then turn to the methods for exploiting the multiple signals. In selection diversity, the ï¿¿ï¿¿ï¿¿bestï¿¿ï¿¿ï¿¿ signal (either the one with the highest field strength ï¿¿ï¿¿ï¿¿ RSSI-driven diversity, or the lowest BER ï¿¿ï¿¿ï¿¿ BER-driven diversity) is used, while all other signals are discarded. In combining diversity, the signals from the different diversity branches are linearly weighted and added. Various types of weights lead to different solutions: maximum ratio combining MRC, equal gain combining EGC, and optimum combining (MMSE combining). Hybrid selection maximum ratio combining provides a compromise between selection diversity and combining diversity. The chapter finally describes methods for the computation of the symbol error probability (SER) and bit error probability (BER) of the various combining methods in noisy fading channels. Diversity is also suitable for reducing the SER caused by delay dispersion and frequency dispersion. A discussion of transmit diversity, with channel state information (maximum ratio transmission, MRT) and without channel state information (including delay diversity and phase- sweeping d iversity) concludes the chapter.

  • Index

    A valuable addition to the Wiley Series in Microwave and Optical Engineering Today's modern wireless mobile communications depend on adaptive "smart" antennas to provide maximum range and clarity. With the recent explosive growth of wireless applications, smart antenna technology has achieved widespread commercial and military applications. The only book available on the topic of adaptive antennas using digital technology, this text reflects the latest developments in smart antenna technology and offers timely information on fundamentals, as well as new adaptive techniques developed by the authors. Coupling electromagnetic aspects of antenna design with signal processing techniques designed to promote accurate and efficient information exchange, the text presents various mechanisms for characterizing signal-path loss associated with signal propagation, particularly for mobile wireless communications systems based on such techniques as joint space-frequency adaptive processing. In clear, accessible language, the authors: * explain the difference between adaptive antennas and adaptive signal processing * Illustrate the procedures for adaptive processing using directive elements in a conformal array * clarify multistage analysis procedure which combines electromagnetic analysis with signal processing * present a survey of the various models for characterizing radio wave propagation in urban and rural environments * describe a method wherein it is possible to identify and eliminate multipath without spatial diversity * optimize the location of base stations in a complex environment The text is an excellent resource for researchers and engineers working in electromagnetics and signal processing who deal with performance improvement of adaptive techniques, as well as thos e who are concerned with the characterization of propagation channels and applications of airborne phased arrays.

  • 3GPP LongTerm Evolution

    We describe the 3GPP Long Term Evolution (LTE) standard, a member of the IMT- Advanced family for fourth-generation cellular communications. The system consists of radio access network (RAN) and core network (System Architecture Evolution SAE or Enhanced Packet Core EPC). Layers of the transmission protocol range from Packet Data Convergence Protocol (PDCP) to Radio Link Control (RLC), MAC, and PHY. After an overview of the physical layer, the division of the time axis into frames, subframes, and slots is discussed. The modulation format is OFDM for the downlink, and single-carrier transmission with frequency domain equalization (SC-FDE) for the uplink. We define resource element and resource blocks (RB). Data are mapped onto physical resources by first mapping symbols onto virtual resource blocks (VRBs), and from there to physical resource blocks (PRBs). There exist two types of reference signals RS (pilot tones): demodulation RS, and sounding RS; both based on Chadoff-Zhu sequences. Error control coding includes cyclic redundancy check (CRC), convolutional codes or turbo codes, and Hybrid ARQ (HARQ). Multiple-antenna techniques include Alamouti codes, possibly combined with antenna selection, for transmit diversity and (open-loop or closed-loop) spatial multiplexing. LTE distinguishes between logical channels and physical channels (time/frequency resources). Logical subchannels include Traffic channels (DTCH, MTCH) and Control channels (BCCH, PCCH, CCCH, DCCH, MCH). These are then mapped, via certain transport channels, to the physical channels. Primary and secondary synchronization signals carry timing information and cell ID. We discuss control information associated with downlink shared channel and uplink signaling (uplink control information, random access, and control signaling for the uplink shared channel). We also describe physical layer procedures, including establishing of a connection, retransmission methods, scheduling, power control, and handover.

  • Fault Zones from Top to Bottom

    We review recent geophysical insights into the physical properties of fault zones at all depths in the crust and subcrustal lithosphere. The fault core zone, where slip occurs, is thin (tens of centimeters) and can mainly be studied in trenches and in borehole well logs. The fault damage zone is wider (tens to hundred of meters) and can be measured by the analysis of fault zone- trapped waves. Such studies indicate that the damage zone extends to a depth of at least 3-5 km, but there is no agreement on the maximum depth limit. The damage zone exhibits a seismic velocity reduction (with respect to the neighboring country rock) as high as 20-50%. Significantly, this velocity reduction appears to have a temporal component, with a maximum reduction after a large rupture. The fault damage zone then undergoes a slow healing process that appears to be related to fluid-rock interactions that leads to dissolution of grain contacts and recrystallization. Deep seismic reflection profiles and teleseismic receiver functions provide excellent images of faults throughout the crust. In extensional environments these profiles show normal faulting in the upper crust and ductile extension in the lower crust. In compressional environments, large-scale low-angle nappes are evident. These are commonly multiply faulted. The very thin damage zones for these low angle faults are indicative of high pore-fluid pressures that appear to counteract the normal stresses, thereby facilitating thrusting. The presence of fluids within fault zones is also evidenced by geo-electrical studies in such diverse environments as the Himalayan and Andean orogens, the San Andreas fault, and the Dead Sea Transform. Such studies show that the fault can act as a fluid conduit, barrier, or combined conduit-barrier system depending on the physical properties of the fault core zone and damage zone. The ge ometry of active fault zones at depth is revealed by precise microearthquake hypocentral locations. There is considerable geometric diversity, with some strike-slip faults showing a very thin (less then 75 m wide) fault plane and others showing wider, segmented planes and/or parallel strands of faulting. A new discovery is slip-parallel, subhorizontal streaks of seismicity that have been identified on some faults. Such streaks may be due to boundaries between locked and slipping parts of the fault or lithologic variations on the fault surface. Measurements of seismic anisotropy across strike-slip faults are consistent with localized fault-parallel shear deformation in the uppermost mantle, with a width that varies between 20 and 100 km. In addition to shear deformation zones, seismic reflection profiles have imaged discrete faults in the uppermost mantle, mainly associated with paleo-continent/continent collisions. Looking deeper, the lithosphere-asthenosphere boundary may be considered as a major shear zone, considering the horizontal movement of lithospheric plates. This shear zone can be imaged with newly developed seismic receiver function methods.

  • Reflective Practitioners

    Over almost three decades, the field of human-computer interaction (HCI) has produced a rich and varied literature. Although the focus of attention today is naturally on new work, older contributions that played a role in shaping the trajectory and character of the field have much to tell us. The contributors to HCI Remixed were asked to reflect on a single work at least ten years old that influenced their approach to HCI. The result is this collection of fifty-one short, engaging, and idiosyncratic essays, reflections on a range of works in a variety of forms that chart the emergence of a new field. An article, a demo, a book: any of these can solve a problem, demonstrate the usefulness of a new method, or prompt a shift in perspective. HCI Remixed offers us glimpses of how this comes about. The contributors consider such HCI classics as Sutherland's Sketchpad, Englebart's demo of NLS, and Fitts on Fitts' Law--and such forgotten gems as Pulfer's NRC Music Machine, and Galloway and Rabinowitz's Hole in Space. Others reflect on works somewhere in between classic and forgotten--Kidd's "The Marks Are on the Knowledge Worker," King Beach's "Becoming a Bartender," and others. Some contributors turn to works in neighboring disciplines--Henry Dreyfuss's book on industrial design, for example--and some range farther afield, to Lovelock's Gaia hypothesis and Jane Jacobs's The Death and Life of Great American Cities. Taken together, the essays offer an accessible, lively, and engaging introduction to HCI research that reflects the diversity of the field's beginnings.Thomas Erickson is Research Staff Member at the IBM T. J. Watson Research Center. David W. McDonald is Assistant Professor at the Information School at the University of Was hington, Seattle.

  • Big Ideas

    Over almost three decades, the field of human-computer interaction (HCI) has produced a rich and varied literature. Although the focus of attention today is naturally on new work, older contributions that played a role in shaping the trajectory and character of the field have much to tell us. The contributors to HCI Remixed were asked to reflect on a single work at least ten years old that influenced their approach to HCI. The result is this collection of fifty-one short, engaging, and idiosyncratic essays, reflections on a range of works in a variety of forms that chart the emergence of a new field. An article, a demo, a book: any of these can solve a problem, demonstrate the usefulness of a new method, or prompt a shift in perspective. HCI Remixed offers us glimpses of how this comes about. The contributors consider such HCI classics as Sutherland's Sketchpad, Englebart's demo of NLS, and Fitts on Fitts' Law--and such forgotten gems as Pulfer's NRC Music Machine, and Galloway and Rabinowitz's Hole in Space. Others reflect on works somewhere in between classic and forgotten--Kidd's "The Marks Are on the Knowledge Worker," King Beach's "Becoming a Bartender," and others. Some contributors turn to works in neighboring disciplines--Henry Dreyfuss's book on industrial design, for example--and some range farther afield, to Lovelock's Gaia hypothesis and Jane Jacobs's The Death and Life of Great American Cities. Taken together, the essays offer an accessible, lively, and engaging introduction to HCI research that reflects the diversity of the field's beginnings.Thomas Erickson is Research Staff Member at the IBM T. J. Watson Research Center. David W. McDonald is Assistant Professor at the Information School at the University of Was hington, Seattle.

  • Seeking Common Ground

    Over almost three decades, the field of human-computer interaction (HCI) has produced a rich and varied literature. Although the focus of attention today is naturally on new work, older contributions that played a role in shaping the trajectory and character of the field have much to tell us. The contributors to HCI Remixed were asked to reflect on a single work at least ten years old that influenced their approach to HCI. The result is this collection of fifty-one short, engaging, and idiosyncratic essays, reflections on a range of works in a variety of forms that chart the emergence of a new field. An article, a demo, a book: any of these can solve a problem, demonstrate the usefulness of a new method, or prompt a shift in perspective. HCI Remixed offers us glimpses of how this comes about. The contributors consider such HCI classics as Sutherland's Sketchpad, Englebart's demo of NLS, and Fitts on Fitts' Law--and such forgotten gems as Pulfer's NRC Music Machine, and Galloway and Rabinowitz's Hole in Space. Others reflect on works somewhere in between classic and forgotten--Kidd's "The Marks Are on the Knowledge Worker," King Beach's "Becoming a Bartender," and others. Some contributors turn to works in neighboring disciplines--Henry Dreyfuss's book on industrial design, for example--and some range farther afield, to Lovelock's Gaia hypothesis and Jane Jacobs's The Death and Life of Great American Cities. Taken together, the essays offer an accessible, lively, and engaging introduction to HCI research that reflects the diversity of the field's beginnings.Thomas Erickson is Research Staff Member at the IBM T. J. Watson Research Center. David W. McDonald is Assistant Professor at the Information School at the University of Was hington, Seattle.

  • Channel Coding and Information Theory

    This chapter discusses fundamentals of information theory and channel coding (error correction coding ECC, Forward error correction FEC). First, key results of Shannon, including channel capacity and the relationship between transmit power and bandwidth, are discussed. Block codes multiply a block of data with an encoding matrix. For systematic codes, the resulting codeword consists of systematic bits and parity check bits. Decoding is achieved by multiplication with a parity check matrix and determination of the syndrome vector. Correction of errors within the correction sphere can be done, e.g., through lookup tables. Convolutional codes send the source data stream through shift registers and adders, a process described by a trellis diagram. Maximum- likelihood sequence estimation (Viterbi algorithm) determines the (transmit) bit sequence with best distance metric (Hamming or Euclidean) from the received signal. Methods for combining coding and higher-order modulation include trellis coded modulation (using set partitioning for code design) and bit-interleaved coded modulation (BICM). Turbo codes are close to capacity- achieving. They are based on transmitting differently interleaved convolutional codes; receivers use soft decoding of the constituent codes and iterative exchange of soft information (log-likelihood ratios). Low-density parity check codes (LDPCC) are decoded by belief propagation (message passing), where variable nodes and constraint nodes exchange beliefs about the codeword. In fading channels, (block or convolutional) interleaving is essential to provide diversity. From an information-theoretic point of view, in fading channels we can distinguish between the ergodic capacity and the outage capacity. If the channel state information is known at the transmitter, waterfilling is the optimum power allocation strategy. Automatic Repeat Request ARQ) and Hyb rid ARQ (including chase combining or incremental redundancy) are described in the appendix.

  • No title

    Many of us wish we could design inventions and make decisions that were optimal and sustainable, but we do not know how to begin the approach. This book offers a guide to dramatically improve the quality of innovation and solution-making through the respectful use of existing and abundant, but often-ignored, resources. Sustainable innovation is about creative combination of ideas, materials, methods, and people, courage to derive value from opposition and diversity, integrative intelligence, virtuous planning, minimal consumption of resources, and definition of alternative plans. Using the method successfully requires that we are truly interested in the common good of humankind, that we care about our environment, and that we take time to think carefully about consequences before we act, invent, or make decisions. It is a call for a much-needed collaboration between people of different backgrounds, skills, and opinions with the intent to preserve individual and local integrity and ado t a win-win mindset. Try it, and partake in its positive and long-lasting effects! Key Features - Description of sustainable innovation and the untapped innovation potential - Sustainable innovation requirements - Sustainable innovation attitudes - Step-by-step guide to sustainable innovation - Application to 21st century challenges - A global win-win scenario Table of Contents: Innovation Attitudes / Inspiration from the Natural and Behavioral Sciences / Untapped Sustainable Innovation Potential / Step-by-Step Guide to Sustainable Innovation / Notes on the Application to 21st century challenges/ Personal Step-by-Step Work Section / Looking to the Future



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