Online Social Networks: Human Cognitive Constraints in Facebook and Twitter provides new insights into the structural properties of personal online social networks and the mechanisms underpinning human online social behavior.

As the availability of digital communication data generated by social media is revolutionizing the field of social networks analysis, the text discusses the use of large- scale datasets to study the structural properties of online ego networks, to compare them with the properties of general human social networks, and to highlight additional properties.

Users will find the data collected and conclusions drawn useful during design or research service initiatives that involve online and mobile social network environments.

Provides an analysis of the structural properties of ego networks in online social networks Presents quantitative evidence of the Dunbar's number in online environments Discusses original structural and dynamic properties of human social network through OSN analysis

Online Social Networks: Human Cognitive Constraints in Facebook and Twitter provides new insights into the structural properties of personal online social networks and the mechanisms underpinning human online social behavior.As the availability of digital communication data generated by social media is revolutionizing the field of social networks analysis, the text discusses the use of large- scale datasets to study the structural properties of online ego networks, to compare them with the properties of general human social networks, and to highlight additional properties.Users will find the data collected and conclusions drawn useful during design or research service initiatives that involve online and mobile social network environments.- Provides an analysis of the structural properties of ego networks in online social networks- Presents quantitative evidence of the Dunbar''s number in online environments- Discusses original structural and dynamic properties of human social network through OSN analysis

The Life of Saint Helia, a late ancient Latin hagiography of uncertain provenance, is a remarkable and virtually unknown text, of which a critical edition and English translation appear here for the first time, accompanied by an introduction and commentary. Written predominately in dialogue format, the Life records a lengthy and highly polemical debate between a young girl Helia and her mother regarding the relative merits of virginity and marriage, followed by a dialogue between Helia and a bishop and a debate between Helia and a judge. The arguments both for and against virginity are biblically based, and the text is notable for its citational density and exegetical creativity. The dramatic narrative that frames the dialogue appears to have been influenced by the apocryphal Acts of Paul and Thecla, while the speeches suggest familiarity with the virginity apologetics of Ambrose and Jerome; because the Life has is preserved in only two medieval manuscripts, both from northern Spain, a Priscillianist context of composition is possible. This lively work will be of great interest to students of hagiography, asceticism, women's history, and biblical exegesis.

Constantina, daughter of the fourth-century emperor Constantine who so famously converted to Christianity, deserves a place of her own in the history of Christianity. As both poet and church-builder, she was an early patron of the Roman cult of the virgin martyr Agnes and was buried ad sanctam in a sumptuously mosaicked mausoleum that still stands. What has been very nearly forgotten is that the twice-married Constantina also came to be viewed as a virgin saint in her own right, said to have been converted and healed of leprosy by Saint Agnes. This volume publishes for the first time critical editions and English translations of three Latin hagiographies dedicated to the empress, offering an introduction and commentaries to contextualize these virtually unknown works. The earliest and longest of them is the anonymous Life of Saint Constantina likely dating to the mid or late sixth century, reflecting a female monastic setting and featuring both a story of pope Silvester's instruction of Constantina and a striking dialogue between Constantina and twelve virgins who offer speeches in praise of virginity as the summum bonum. A second, slightly later work, On the Feast of Saint Constantia (the misnaming of the saint reflecting common confusion), is a more streamlined account apparently tailored for liturgical use in early seventh-century Rome; this text is reworked and expanded by the twelfth-century Roman scholar Nicolaus Maniacoria in his Life of the Blessed Constantia, including a question-and-answer dialogue between Constantina and her two virginal charges Attica and Artemia. These works will be of great interest to students of late ancient and medieval saints' cults, hagiography, monasticism, and women's history.

The first 'heretic' to be condemned to death at the end of IV century, Priscillian, sometime bishop of Avila, has generated much scholarly interest in early Christian studies since the rediscovery of his works in the nineteenth century. Early scholarly attention focussed on the question of Priscillian's heterodoxy. Was he really an orthodox thinker victimised by ecclesiastical politics or were the accusations of heresy fully grounded in his teachings? Recent scholarship has moved away from rigid categorisation of the individual and focussed on the social-political movement of Priscillianism, with a tendency to neglect the literary corpus. Marco Conti draws attention back to the writings and the theological reflections there contained. Published for the first time in one volume with facing page translation and systematic commentaries, The Complete Works provide invaluable material for better understanding the complex nature of this fascinating figure and the movement he inspired, a crucial example of early opposition to Ecclesiastical power. With an extensive introduction providing biographical and textual background information.

The Life of Saint Helia, a late ancient Latin hagiography of uncertain provenance, is a remarkable and virtually unknown text, of which a critical edition and English translation appear here for the first time, accompanied by an introduction and commentary. Written predominately in dialogue format, the Life records a lengthy and highly polemical debate between a young girl Helia and her mother regarding the relative merits of virginity and marriage, followed by a dialogue between Helia and a bishop and a debate between Helia and a judge. The arguments both for and against virginity are biblically based, and the text is notable for its citational density and exegetical creativity. The dramatic narrative that frames the dialogue appears to have been influenced by the apocryphal Acts of Paul and Thecla, while the speeches suggest familiarity with the virginity apologetics of Ambrose and Jerome; because the Life has is preserved in only two medieval manuscripts, both from northern Spain, a Priscillianist context of composition is possible. This lively work will be of great interest to students of hagiography, asceticism, women's history, and biblical exegesis.

From physical issues up to applications aspects, Mobile Ad Hoc Networking comprehensively covers all areas of the technology, including protocols and models, with an emphasis on the most current research and development in the rapidly growing area of ad hoc networks. All material has been carefully screened for quality and relevance and reviewed by the most renowned and involved experts in the field. Explores the most recent research and development in the rapidly growing area of ad hoc networks. Includes coverage of ad hoc networking trends, possible architectures, and the advantages/limits for future commercial, social, and educational applications. Ad hoc networks have been an intense area of research and development but many products that fully utilize this technology are only now being widely deployed throughout the world.

"An excellent book for those who are interested in learning the current status of research and development . . . [and] who want to get a comprehensive overview of the current state-of-the-art."—E-StreamsThis book provides up-to-date information on research and development in the rapidly growing area of networks based on the multihop ad hoc networking paradigm. It reviews all classes of networks that have successfully adopted this paradigm, pointing out how they penetrated the mass market and sparked breakthrough research.Covering both physical issues and applications, Mobile Ad Hoc Networking: Cutting Edge Directions offers useful tools for professionals and researchers in diverse areas wishing tolearn about the latest trends in sensor, actuator, and robot networking, mesh networks, delay tolerant and opportunistic networking, and vehicular networks.Chapter coverage includes: Multihop ad hoc networkingEnabling technologies and standards for mobile multihop wireless networkingResource optimization in multiradio multichannel wireless mesh networksQoS in mesh networksRouting and data dissemination in opportunistic networksTask farming in crowd computingMobility models, topology, and simulations in VANETMAC protocols for VANETWireless sensor networks with energy harvesting nodesRobot-assisted wireless sensor networks: recent applications and future challengesAdvances in underwater acoustic networkingSecurity in wireless ad hoc networksMobile Ad Hoc Networking will appeal to researchers, developers, and students interested in computer science, electrical engineering, and telecommunications.

"An excellent book for those who are interested in learning the current status of research and development . . . [and] who want to get a comprehensive overview of the current state-of-the-art." —E-Streams

This book provides up-to-date information on research and development in the rapidly growing area of networks based on the multihop ad hoc networking paradigm. It reviews all classes of networks that have successfully adopted this paradigm, pointing out how they penetrated the mass market and sparked breakthrough research.

Covering both physical issues and applications, Mobile Ad Hoc Networking: Cutting Edge Directions offers useful tools for professionals and researchers in diverse areas wishing to

learn about the latest trends in sensor, actuator, and robot networking, mesh networks, delay tolerant and opportunistic networking, and vehicular networks.

Chapter coverage includes:

Multihop ad hoc networking Enabling technologies and standards for mobile multihop wireless networking Resource optimization in multiradio multichannel wireless mesh networks QoS in mesh networks Routing and data dissemination in opportunistic networks Task farming in crowd computing Mobility models, topology, and simulations in VANET MAC protocols for VANET Wireless sensor networks with energy harvesting nodes Robot-assisted wireless sensor networks: recent applications and future challenges Advances in underwater acoustic networking Security in wireless ad hoc networks

Mobile Ad Hoc Networking will appeal to researchers, developers, and students interested in computer science, electrical engineering, and telecommunications.

"An excellent book for those who are interested in learning the current status of research and development . . . [and] who want to get a comprehensive overview of the current state-of-the-art." —E-Streams

This book provides up-to-date information on research and development in the rapidly growing area of networks based on the multihop ad hoc networking paradigm. It reviews all classes of networks that have successfully adopted this paradigm, pointing out how they penetrated the mass market and sparked breakthrough research.

Covering both physical issues and applications, Mobile Ad Hoc Networking: Cutting Edge Directions offers useful tools for professionals and researchers in diverse areas wishing to

learn about the latest trends in sensor, actuator, and robot networking, mesh networks, delay tolerant and opportunistic networking, and vehicular networks.

Chapter coverage includes:

Multihop ad hoc networking Enabling technologies and standards for mobile multihop wireless networking Resource optimization in multiradio multichannel wireless mesh networks QoS in mesh networks Routing and data dissemination in opportunistic networks Task farming in crowd computing Mobility models, topology, and simulations in VANET MAC protocols for VANET Wireless sensor networks with energy harvesting nodes Robot-assisted wireless sensor networks: recent applications and future challenges Advances in underwater acoustic networking Security in wireless ad hoc networks

Mobile Ad Hoc Networking will appeal to researchers, developers, and students interested in computer science, electrical engineering, and telecommunications.

This book constitutes the refereed proceedings of the IFIP-TC6 Eighth - ternational Conference on Personal Wireless Communications, PWC 2003. PWC 2003 is the ?agship conference of the IFIP Working Group 6.8, Mobile and Wireless Communications, and is the premier international forum for discussions between researchers, practitioners, and students interested in the symbiosis of mobile computing and wireless networks. It is a great pleasure to present the PWC 2003 technical program. This year the conference received 115 submissions from 27 countries indicating that PWC is a reference conference for worldwide researchers from the wireless and mobile community. With so many papers to choose from, the Technical Program Committee’s job, to provide a conference program of the highest technical quality, was challenging and time consuming. From the 115 submissions, we ?nally selected 34 full papers and 15 short papers for presentation in the conference technical sessions. The conference technical program was split into three days, and included, in addition to the 49 refereed contributions, 4 invited papers from top-level researchers from the mobile and wireless community. To give researchers the opportunity to present ongoing work, and the novel ideas they are starting to explore, we included in the technical program two work-in-progress sessions and two novel-ideas sessions. The technical program also included a poster session devoted to presenting ongoing research projects on wireless and mobile communications.

Thisbookcontainstherefereedproceedingsofthe1stIFIP-TC6WorkingCon- rence on Wireless-On-Demand Network Systems, WONS 2004. It was sponsored by the IFIP Working Groups 6.3 (Performance of Computer and Commu- cation Networks)and6.8(Mobile and Wireless Communications), and aimed at becoming a premier international forum for discussions between researchers and practitioners interested in the evolution of Wireless Internet Access toward on-demand networking. Ad hoc, routing, localization, resource management, - curity, applications, performance and analytical models were topics covered in depth by technical papers in this book. Theconferencereceived77submissionsfrom22countries,showingthewor- wide interest. With so many papers to choose from, the Technical Program Committee’s job, providing a conference program with the highest quality, was challenging and time consuming. We ?nally selected 25 full papers for presen- tion in the conference technical sessions. To give researchers the opportunity to present the novel ideas they are starting to explore, we included in the technical program a poster session devoted to presenting preliminary research results: 7 short papers were selected for presentation in this session. Accepted papers and posters came from 15 di?erent countries. The technical program also included a keynote speech “Ad Hoc Wireless Networks: Protocols and Applications” by Prof. Mario Gerla, and a panel s- sion devoted to the discussion of the conference topics between academics and industry representatives. This event would not have been possible without the enthusiasm and hard work of a number of colleagues. A special thanks to the TPC members, and all the referees, for their invaluable help in reviewing the papers for WONS 2004.

Thisbookcontainstherefereedproceedingsofthe1stIFIP-TC6WorkingCon- rence on Wireless-On-Demand Network Systems, WONS 2004. It was sponsored by the IFIP Working Groups 6.3 (Performance of Computer and Commu- cation Networks)and6.8(Mobile and Wireless Communications), and aimed at becoming a premier international forum for discussions between researchers and practitioners interested in the evolution of Wireless Internet Access toward on-demand networking. Ad hoc, routing, localization, resource management, - curity, applications, performance and analytical models were topics covered in depth by technical papers in this book. Theconferencereceived77submissionsfrom22countries,showingthewor- wide interest. With so many papers to choose from, the Technical Program Committee’s job, providing a conference program with the highest quality, was challenging and time consuming. We ?nally selected 25 full papers for presen- tion in the conference technical sessions. To give researchers the opportunity to present the novel ideas they are starting to explore, we included in the technical program a poster session devoted to presenting preliminary research results: 7 short papers were selected for presentation in this session. Accepted papers and posters came from 15 di?erent countries. The technical program also included a keynote speech “Ad Hoc Wireless Networks: Protocols and Applications” by Prof. Mario Gerla, and a panel s- sion devoted to the discussion of the conference topics between academics and industry representatives. This event would not have been possible without the enthusiasm and hard work of a number of colleagues. A special thanks to the TPC members, and all the referees, for their invaluable help in reviewing the papers for WONS 2004.

This book constitutes the refereed proceedings of the IFIP-TC6 Eighth - ternational Conference on Personal Wireless Communications, PWC 2003. PWC 2003 is the ?agship conference of the IFIP Working Group 6.8, Mobile and Wireless Communications, and is the premier international forum for discussions between researchers, practitioners, and students interested in the symbiosis of mobile computing and wireless networks. It is a great pleasure to present the PWC 2003 technical program. This year the conference received 115 submissions from 27 countries indicating that PWC is a reference conference for worldwide researchers from the wireless and mobile community. With so many papers to choose from, the Technical Program Committee’s job, to provide a conference program of the highest technical quality, was challenging and time consuming. From the 115 submissions, we ?nally selected 34 full papers and 15 short papers for presentation in the conference technical sessions. The conference technical program was split into three days, and included, in addition to the 49 refereed contributions, 4 invited papers from top-level researchers from the mobile and wireless community. To give researchers the opportunity to present ongoing work, and the novel ideas they are starting to explore, we included in the technical program two work-in-progress sessions and two novel-ideas sessions. The technical program also included a poster session devoted to presenting ongoing research projects on wireless and mobile communications.

This book constitutes the refereed proceedings of the Second IFIP-TC6 Netw- king Conference, Networking 2002. This represents a 50% increase in submissions over the ?rst conference, thus indicating that Networking is becoming a reference conference for wor- wide researchers in the networking community.

This book constitutes the refereed proceedings of the Second IFIP-TC6 Netw- king Conference, Networking 2002. Networking 2002 was sponsored bythe IFIP Working Groups 6.2, 6.3, and 6.8. For this reason the conference was structured into three tracks: i) Networking Technologies, Services, and Protocols, ii) Perf- mance of Computer and Communication Networks, and iii) Mobile and Wireless Communications. This year the conference received 314 submissions coming from 42 countries from all ?ve continents Africa (4), Asia (84), America (63), Europe (158), and Oc- nia (5). This represents a 50% increase in submissions over the ?rst conference, thus indicating that Networking is becoming a reference conference for wor- wide researchers in the networking community. With so manypapers to choose from, the job of the Technical Program C- mittee, to provide a conference program of the highest technical excellence, was both challenging and time consuming. From the 314 submissions, we ?nallys- ected 82 full papers for presentation during the conference technical sessions. To give young researchers and researchers from emerging countries the oppor- nityto present their work and to receive useful feedback from participants, we decided to include two poster sessions during the technical program. Thirty-one short papers were selected for presentation during the poster sessions. The conference technical program was split into three days, and included, in addition to the 82 refereed contributions, 5 invited papers from top-level rese- chers in the networking community.

Cyclic nucleotide phosphodiesterases (PDEs) are promising targets for pharmacological intervention. Multiple PDE genes, isoform diversity, selective expression and compartmentation of the isoforms, and an array of conformations of PDE proteins are properties that challenge development of drugs that selectively target this class of enzymes. Novel characteristics of PDEs are viewed as unique opportunities to increase specificity and selectivity when designing novel compounds for certain therapeutic indications. This chapter provides a summary of the major concepts related to the design and use of PDE inhibitors.

Cyclic nucleotide phosphodiesterases (PDEs) are promising targets for pharmacological intervention. Multiple PDE genes, isoform diversity, selective expression and compartmentation of the isoforms, and an array of conformations of PDE proteins are properties that challenge development of drugs that selectively target this class of enzymes. Novel characteristics of PDEs are viewed as unique opportunities to increase specificity and selectivity when designing novel compounds for certain therapeutic indications. This chapter provides a summary of the major concepts related to the design and use of PDE inhibitors.

Cyclic nucleotide phosphodiesterases (PDEs) are promising targets for pharmacological intervention. Multiple PDE genes, isoform diversity, selective expression and compartmentation of the isoforms, and an array of conformations of PDE proteins are properties that challenge development of drugs that selectively target this class of enzymes. Novel characteristics of PDEs are viewed as unique opportunities to increase specificity and selectivity when designing novel compounds for certain therapeutic indications. This chapter provides a summary of the major concepts related to the design and use of PDE inhibitors.

Online Social Networks: Human Cognitive Constraints in Facebook and Twitter provides new insights into the structural properties of personal online social networks and the mechanisms underpinning human online social behavior.

As the availability of digital communication data generated by social media is revolutionizing the field of social networks analysis, the text discusses the use of large- scale datasets to study the structural properties of online ego networks, to compare them with the properties of general human social networks, and to highlight additional properties.

Users will find the data collected and conclusions drawn useful during design or research service initiatives that involve online and mobile social network environments.

Provides an analysis of the structural properties of ego networks in online social networks Presents quantitative evidence of the Dunbar's number in online environments Discusses original structural and dynamic properties of human social network through OSN analysis

Online Social Networks: Human Cognitive Constraints in Facebook and Twitter provides new insights into the structural properties of personal online social networks and the mechanisms underpinning human online social behavior.As the availability of digital communication data generated by social media is revolutionizing the field of social networks analysis, the text discusses the use of large- scale datasets to study the structural properties of online ego networks, to compare them with the properties of general human social networks, and to highlight additional properties.Users will find the data collected and conclusions drawn useful during design or research service initiatives that involve online and mobile social network environments.- Provides an analysis of the structural properties of ego networks in online social networks- Presents quantitative evidence of the Dunbar''s number in online environments- Discusses original structural and dynamic properties of human social network through OSN analysis

The Life of Saint Helia, a late ancient Latin hagiography of uncertain provenance, is a remarkable and virtually unknown text, of which a critical edition and English translation appear here for the first time, accompanied by an introduction and commentary. Written predominately in dialogue format, the Life records a lengthy and highly polemical debate between a young girl Helia and her mother regarding the relative merits of virginity and marriage, followed by a dialogue between Helia and a bishop and a debate between Helia and a judge. The arguments both for and against virginity are biblically based, and the text is notable for its citational density and exegetical creativity. The dramatic narrative that frames the dialogue appears to have been influenced by the apocryphal Acts of Paul and Thecla, while the speeches suggest familiarity with the virginity apologetics of Ambrose and Jerome; because the Life has is preserved in only two medieval manuscripts, both from northern Spain, a Priscillianist context of composition is possible. This lively work will be of great interest to students of hagiography, asceticism, women's history, and biblical exegesis.

Constantina, daughter of the fourth-century emperor Constantine who so famously converted to Christianity, deserves a place of her own in the history of Christianity. As both poet and church-builder, she was an early patron of the Roman cult of the virgin martyr Agnes and was buried ad sanctam in a sumptuously mosaicked mausoleum that still stands. What has been very nearly forgotten is that the twice-married Constantina also came to be viewed as a virgin saint in her own right, said to have been converted and healed of leprosy by Saint Agnes. This volume publishes for the first time critical editions and English translations of three Latin hagiographies dedicated to the empress, offering an introduction and commentaries to contextualize these virtually unknown works. The earliest and longest of them is the anonymous Life of Saint Constantina likely dating to the mid or late sixth century, reflecting a female monastic setting and featuring both a story of pope Silvester's instruction of Constantina and a striking dialogue between Constantina and twelve virgins who offer speeches in praise of virginity as the summum bonum. A second, slightly later work, On the Feast of Saint Constantia (the misnaming of the saint reflecting common confusion), is a more streamlined account apparently tailored for liturgical use in early seventh-century Rome; this text is reworked and expanded by the twelfth-century Roman scholar Nicolaus Maniacoria in his Life of the Blessed Constantia, including a question-and-answer dialogue between Constantina and her two virginal charges Attica and Artemia. These works will be of great interest to students of late ancient and medieval saints' cults, hagiography, monasticism, and women's history.

The first 'heretic' to be condemned to death at the end of IV century, Priscillian, sometime bishop of Avila, has generated much scholarly interest in early Christian studies since the rediscovery of his works in the nineteenth century. Early scholarly attention focussed on the question of Priscillian's heterodoxy. Was he really an orthodox thinker victimised by ecclesiastical politics or were the accusations of heresy fully grounded in his teachings? Recent scholarship has moved away from rigid categorisation of the individual and focussed on the social-political movement of Priscillianism, with a tendency to neglect the literary corpus. Marco Conti draws attention back to the writings and the theological reflections there contained. Published for the first time in one volume with facing page translation and systematic commentaries, The Complete Works provide invaluable material for better understanding the complex nature of this fascinating figure and the movement he inspired, a crucial example of early opposition to Ecclesiastical power. With an extensive introduction providing biographical and textual background information.

The Life of Saint Helia, a late ancient Latin hagiography of uncertain provenance, is a remarkable and virtually unknown text, of which a critical edition and English translation appear here for the first time, accompanied by an introduction and commentary. Written predominately in dialogue format, the Life records a lengthy and highly polemical debate between a young girl Helia and her mother regarding the relative merits of virginity and marriage, followed by a dialogue between Helia and a bishop and a debate between Helia and a judge. The arguments both for and against virginity are biblically based, and the text is notable for its citational density and exegetical creativity. The dramatic narrative that frames the dialogue appears to have been influenced by the apocryphal Acts of Paul and Thecla, while the speeches suggest familiarity with the virginity apologetics of Ambrose and Jerome; because the Life has is preserved in only two medieval manuscripts, both from northern Spain, a Priscillianist context of composition is possible. This lively work will be of great interest to students of hagiography, asceticism, women's history, and biblical exegesis.

From physical issues up to applications aspects, Mobile Ad Hoc Networking comprehensively covers all areas of the technology, including protocols and models, with an emphasis on the most current research and development in the rapidly growing area of ad hoc networks. All material has been carefully screened for quality and relevance and reviewed by the most renowned and involved experts in the field. Explores the most recent research and development in the rapidly growing area of ad hoc networks. Includes coverage of ad hoc networking trends, possible architectures, and the advantages/limits for future commercial, social, and educational applications. Ad hoc networks have been an intense area of research and development but many products that fully utilize this technology are only now being widely deployed throughout the world.

"An excellent book for those who are interested in learning the current status of research and development . . . [and] who want to get a comprehensive overview of the current state-of-the-art."—E-StreamsThis book provides up-to-date information on research and development in the rapidly growing area of networks based on the multihop ad hoc networking paradigm. It reviews all classes of networks that have successfully adopted this paradigm, pointing out how they penetrated the mass market and sparked breakthrough research.Covering both physical issues and applications, Mobile Ad Hoc Networking: Cutting Edge Directions offers useful tools for professionals and researchers in diverse areas wishing tolearn about the latest trends in sensor, actuator, and robot networking, mesh networks, delay tolerant and opportunistic networking, and vehicular networks.Chapter coverage includes: Multihop ad hoc networkingEnabling technologies and standards for mobile multihop wireless networkingResource optimization in multiradio multichannel wireless mesh networksQoS in mesh networksRouting and data dissemination in opportunistic networksTask farming in crowd computingMobility models, topology, and simulations in VANETMAC protocols for VANETWireless sensor networks with energy harvesting nodesRobot-assisted wireless sensor networks: recent applications and future challengesAdvances in underwater acoustic networkingSecurity in wireless ad hoc networksMobile Ad Hoc Networking will appeal to researchers, developers, and students interested in computer science, electrical engineering, and telecommunications.

"An excellent book for those who are interested in learning the current status of research and development . . . [and] who want to get a comprehensive overview of the current state-of-the-art." —E-Streams

This book provides up-to-date information on research and development in the rapidly growing area of networks based on the multihop ad hoc networking paradigm. It reviews all classes of networks that have successfully adopted this paradigm, pointing out how they penetrated the mass market and sparked breakthrough research.

Covering both physical issues and applications, Mobile Ad Hoc Networking: Cutting Edge Directions offers useful tools for professionals and researchers in diverse areas wishing to

learn about the latest trends in sensor, actuator, and robot networking, mesh networks, delay tolerant and opportunistic networking, and vehicular networks.

Chapter coverage includes:

Multihop ad hoc networking Enabling technologies and standards for mobile multihop wireless networking Resource optimization in multiradio multichannel wireless mesh networks QoS in mesh networks Routing and data dissemination in opportunistic networks Task farming in crowd computing Mobility models, topology, and simulations in VANET MAC protocols for VANET Wireless sensor networks with energy harvesting nodes Robot-assisted wireless sensor networks: recent applications and future challenges Advances in underwater acoustic networking Security in wireless ad hoc networks

Mobile Ad Hoc Networking will appeal to researchers, developers, and students interested in computer science, electrical engineering, and telecommunications.

"An excellent book for those who are interested in learning the current status of research and development . . . [and] who want to get a comprehensive overview of the current state-of-the-art." —E-Streams

This book provides up-to-date information on research and development in the rapidly growing area of networks based on the multihop ad hoc networking paradigm. It reviews all classes of networks that have successfully adopted this paradigm, pointing out how they penetrated the mass market and sparked breakthrough research.

Covering both physical issues and applications, Mobile Ad Hoc Networking: Cutting Edge Directions offers useful tools for professionals and researchers in diverse areas wishing to

learn about the latest trends in sensor, actuator, and robot networking, mesh networks, delay tolerant and opportunistic networking, and vehicular networks.

Chapter coverage includes:

Multihop ad hoc networking Enabling technologies and standards for mobile multihop wireless networking Resource optimization in multiradio multichannel wireless mesh networks QoS in mesh networks Routing and data dissemination in opportunistic networks Task farming in crowd computing Mobility models, topology, and simulations in VANET MAC protocols for VANET Wireless sensor networks with energy harvesting nodes Robot-assisted wireless sensor networks: recent applications and future challenges Advances in underwater acoustic networking Security in wireless ad hoc networks

Mobile Ad Hoc Networking will appeal to researchers, developers, and students interested in computer science, electrical engineering, and telecommunications.

This book constitutes the refereed proceedings of the IFIP-TC6 Eighth - ternational Conference on Personal Wireless Communications, PWC 2003. PWC 2003 is the ?agship conference of the IFIP Working Group 6.8, Mobile and Wireless Communications, and is the premier international forum for discussions between researchers, practitioners, and students interested in the symbiosis of mobile computing and wireless networks. It is a great pleasure to present the PWC 2003 technical program. This year the conference received 115 submissions from 27 countries indicating that PWC is a reference conference for worldwide researchers from the wireless and mobile community. With so many papers to choose from, the Technical Program Committee’s job, to provide a conference program of the highest technical quality, was challenging and time consuming. From the 115 submissions, we ?nally selected 34 full papers and 15 short papers for presentation in the conference technical sessions. The conference technical program was split into three days, and included, in addition to the 49 refereed contributions, 4 invited papers from top-level researchers from the mobile and wireless community. To give researchers the opportunity to present ongoing work, and the novel ideas they are starting to explore, we included in the technical program two work-in-progress sessions and two novel-ideas sessions. The technical program also included a poster session devoted to presenting ongoing research projects on wireless and mobile communications.

Thisbookcontainstherefereedproceedingsofthe1stIFIP-TC6WorkingCon- rence on Wireless-On-Demand Network Systems, WONS 2004. It was sponsored by the IFIP Working Groups 6.3 (Performance of Computer and Commu- cation Networks)and6.8(Mobile and Wireless Communications), and aimed at becoming a premier international forum for discussions between researchers and practitioners interested in the evolution of Wireless Internet Access toward on-demand networking. Ad hoc, routing, localization, resource management, - curity, applications, performance and analytical models were topics covered in depth by technical papers in this book. Theconferencereceived77submissionsfrom22countries,showingthewor- wide interest. With so many papers to choose from, the Technical Program Committee’s job, providing a conference program with the highest quality, was challenging and time consuming. We ?nally selected 25 full papers for presen- tion in the conference technical sessions. To give researchers the opportunity to present the novel ideas they are starting to explore, we included in the technical program a poster session devoted to presenting preliminary research results: 7 short papers were selected for presentation in this session. Accepted papers and posters came from 15 di?erent countries. The technical program also included a keynote speech “Ad Hoc Wireless Networks: Protocols and Applications” by Prof. Mario Gerla, and a panel s- sion devoted to the discussion of the conference topics between academics and industry representatives. This event would not have been possible without the enthusiasm and hard work of a number of colleagues. A special thanks to the TPC members, and all the referees, for their invaluable help in reviewing the papers for WONS 2004.

Thisbookcontainstherefereedproceedingsofthe1stIFIP-TC6WorkingCon- rence on Wireless-On-Demand Network Systems, WONS 2004. It was sponsored by the IFIP Working Groups 6.3 (Performance of Computer and Commu- cation Networks)and6.8(Mobile and Wireless Communications), and aimed at becoming a premier international forum for discussions between researchers and practitioners interested in the evolution of Wireless Internet Access toward on-demand networking. Ad hoc, routing, localization, resource management, - curity, applications, performance and analytical models were topics covered in depth by technical papers in this book. Theconferencereceived77submissionsfrom22countries,showingthewor- wide interest. With so many papers to choose from, the Technical Program Committee’s job, providing a conference program with the highest quality, was challenging and time consuming. We ?nally selected 25 full papers for presen- tion in the conference technical sessions. To give researchers the opportunity to present the novel ideas they are starting to explore, we included in the technical program a poster session devoted to presenting preliminary research results: 7 short papers were selected for presentation in this session. Accepted papers and posters came from 15 di?erent countries. The technical program also included a keynote speech “Ad Hoc Wireless Networks: Protocols and Applications” by Prof. Mario Gerla, and a panel s- sion devoted to the discussion of the conference topics between academics and industry representatives. This event would not have been possible without the enthusiasm and hard work of a number of colleagues. A special thanks to the TPC members, and all the referees, for their invaluable help in reviewing the papers for WONS 2004.

This book constitutes the refereed proceedings of the IFIP-TC6 Eighth - ternational Conference on Personal Wireless Communications, PWC 2003. PWC 2003 is the ?agship conference of the IFIP Working Group 6.8, Mobile and Wireless Communications, and is the premier international forum for discussions between researchers, practitioners, and students interested in the symbiosis of mobile computing and wireless networks. It is a great pleasure to present the PWC 2003 technical program. This year the conference received 115 submissions from 27 countries indicating that PWC is a reference conference for worldwide researchers from the wireless and mobile community. With so many papers to choose from, the Technical Program Committee’s job, to provide a conference program of the highest technical quality, was challenging and time consuming. From the 115 submissions, we ?nally selected 34 full papers and 15 short papers for presentation in the conference technical sessions. The conference technical program was split into three days, and included, in addition to the 49 refereed contributions, 4 invited papers from top-level researchers from the mobile and wireless community. To give researchers the opportunity to present ongoing work, and the novel ideas they are starting to explore, we included in the technical program two work-in-progress sessions and two novel-ideas sessions. The technical program also included a poster session devoted to presenting ongoing research projects on wireless and mobile communications.

This book constitutes the refereed proceedings of the Second IFIP-TC6 Netw- king Conference, Networking 2002. This represents a 50% increase in submissions over the ?rst conference, thus indicating that Networking is becoming a reference conference for wor- wide researchers in the networking community.

This book constitutes the refereed proceedings of the Second IFIP-TC6 Netw- king Conference, Networking 2002. Networking 2002 was sponsored bythe IFIP Working Groups 6.2, 6.3, and 6.8. For this reason the conference was structured into three tracks: i) Networking Technologies, Services, and Protocols, ii) Perf- mance of Computer and Communication Networks, and iii) Mobile and Wireless Communications. This year the conference received 314 submissions coming from 42 countries from all ?ve continents Africa (4), Asia (84), America (63), Europe (158), and Oc- nia (5). This represents a 50% increase in submissions over the ?rst conference, thus indicating that Networking is becoming a reference conference for wor- wide researchers in the networking community. With so manypapers to choose from, the job of the Technical Program C- mittee, to provide a conference program of the highest technical excellence, was both challenging and time consuming. From the 314 submissions, we ?nallys- ected 82 full papers for presentation during the conference technical sessions. To give young researchers and researchers from emerging countries the oppor- nityto present their work and to receive useful feedback from participants, we decided to include two poster sessions during the technical program. Thirty-one short papers were selected for presentation during the poster sessions. The conference technical program was split into three days, and included, in addition to the 82 refereed contributions, 5 invited papers from top-level rese- chers in the networking community.

Cyclic nucleotide phosphodiesterases (PDEs) are promising targets for pharmacological intervention. Multiple PDE genes, isoform diversity, selective expression and compartmentation of the isoforms, and an array of conformations of PDE proteins are properties that challenge development of drugs that selectively target this class of enzymes. Novel characteristics of PDEs are viewed as unique opportunities to increase specificity and selectivity when designing novel compounds for certain therapeutic indications. This chapter provides a summary of the major concepts related to the design and use of PDE inhibitors.

Cyclic nucleotide phosphodiesterases (PDEs) are promising targets for pharmacological intervention. Multiple PDE genes, isoform diversity, selective expression and compartmentation of the isoforms, and an array of conformations of PDE proteins are properties that challenge development of drugs that selectively target this class of enzymes. Novel characteristics of PDEs are viewed as unique opportunities to increase specificity and selectivity when designing novel compounds for certain therapeutic indications. This chapter provides a summary of the major concepts related to the design and use of PDE inhibitors.

Cyclic nucleotide phosphodiesterases (PDEs) are promising targets for pharmacological intervention. Multiple PDE genes, isoform diversity, selective expression and compartmentation of the isoforms, and an array of conformations of PDE proteins are properties that challenge development of drugs that selectively target this class of enzymes. Novel characteristics of PDEs are viewed as unique opportunities to increase specificity and selectivity when designing novel compounds for certain therapeutic indications. This chapter provides a summary of the major concepts related to the design and use of PDE inhibitors.