Tag: Medium

Distributed Medium Access Control in Wireless Networks


Free Download Distributed Medium Access Control in Wireless Networks By Ping Wang, Weihua Zhuang (auth.)
2013 | 109 Pages | ISBN: 1461466016 | PDF | 2 MB
This brief investigates distributed medium access control (MAC) with QoS provisioning for both single- and multi-hop wireless networks including wireless local area networks (WLANs), wireless ad hoc networks, and wireless mesh networks. For WLANs, an efficient MAC scheme and a call admission control algorithm are presented to provide guaranteed QoS for voice traffic and, at the same time, increase the voice capacity significantly compared with the current WLAN standard. In addition, a novel token-based scheduling scheme is proposed to provide great flexibility and facility to the network service provider for service class management.Also proposed is a novel busy-tone based distributed MAC scheme for wireless ad hoc networks and a collision-free MAC scheme for wireless mesh networks, respectively, taking the different network characteristics into consideration. The proposed schemes enhance the QoS provisioning capability to real-time traffic and, at the same time, significantly improve the system throughput and fairness performance for data traffic, as compared with the most popular IEEE 802.11 MAC scheme.

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Synthesis of Medium-Sized Cycloalkenes via Fused-Cyclobutenes (Springer Theses)


Free Download Synthesis of Medium-Sized Cycloalkenes via Fused-Cyclobutenes (Springer Theses) by Tomohiro Ito
English | April 6, 2024 | ISBN: 9819707862 | 141 pages | MOBI | 14 Mb
This book explains the existence of the intermediate using two approaches: computational chemistry and coordination chemistry. In this book, the author has developed new methods for synthesizing medium-sized cycloalkenes by utilizing the 4π-electrocyclic reaction of fused-cyclobutenes. The fundamental and most important strategy and feature of the work are as follows: first, cyclobutene is used as a readily available raw material with high-strain energy to generate more strained medium-sized cis,trans-cycloalkadiene molecules. Second, by judiciously selecting the reaction conditions, the short-lived intermediate (medium-sized cis,trans-cycloalkadiene) can be converted to medium-sized cis- or trans-cycloalkenes. For the former, the generation of the medium-sized cis,trans-cycloalkadiene intermediate is greatly affected by the substituent on the cyclobutene, and there are few examples of its generation confirmed at room temperature. Regarding the latter, the synthesis of trans-cycloalkenes is noteworthy in terms of establishing a new synthetic methodology and providing one of the few asymmetric synthesis methods, which has not been achieved before. Readers of this book can gain novel insights into strained molecules involved not only in small-sized cycloalkenes but also in medium-sized ones.

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The Heliosphere in the Local Interstellar Medium Proceedings of the First ISSI Workshop 6-10 November 1995, Bern, Switzerland


Free Download The Heliosphere in the Local Interstellar Medium: Proceedings of the First ISSI Workshop 6-10 November 1995, Bern, Switzerland By Sir H. Bondi (auth.), R. Von Steiger, R. Lallement, M. A. Lee (eds.)
1996 | 399 Pages | ISBN: 9401072965 | PDF | 17 MB
In summary, we can conclude that the contributions of the different ionization processes to the total ionization rate for the most abundant interstellar species are basically known. The ionization of the noble gases He and Ne is almost completely dominated by photoionization, whereas for H charge-exchange with the solar wind is most important. For other species, such as 0 and Ar, both processes contribute significantly. Electron impact ionization can typically contribute by ‘" 10% to the total rate in the inner Solar System. Because direct measurements of the solar EUV flux are not yet continuously available, the variation of the ionization rate over the solar cycle still contains a relatively large uncertainty. The recent measurements of pickup ion distributions and of the neutral helium gas provide an independent tool to determine the total ionization rate that can be used to cross calibrate with the results obtained for the individual ionization processes. Acknowledgements The authors are grateful to M. Allen for supplying us with new data on photoioniza tion cross-sections compiled by him. We thank also M. Gruntman for drawing our attention to and support in collecting the most recent data on charge-exchange cross-sections. D. R. was supported by grant No. 2 P03C. 004. 09 from the Com mittee for Scientific Research (Poland). This work was also supported in part through NASA contract NAS7-918, NSF Grant INT-911637, NASA Grant NAGW- 2579.

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The Webcam as an Emerging Cinematic Medium


Free Download Paula Albuquerque, "The Webcam as an Emerging Cinematic Medium "
English | ISBN: 9462985588 | 2018 | 244 pages | PDF | 2 MB
All the world’s a stage – literally so, given the ubiquitous presence of webcams recording daily life in cities. This footage, allegedly documentary, recreates cities as cinematic environments as people interact with the multitudes of cameras and screens around them. Paula Albuquerque’s original research and experimental films, presented in this groundbreaking book, expose fictionalising elements in archival webcams and explore video surveillance as an urban condition that influences both perceptions of the past and visions of the future.

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Small and Medium-Sized Enterprise (SME) Resilience Strategies for Risk and Crisis Management


Free Download Small and Medium-Sized Enterprise (SME) Resilience: Strategies for Risk and Crisis Management (Management for Professionals) by Susanne Durst, Thomas Henschel
English | March 19, 2024 | ISBN: 3031508351 | 360 pages | MOBI | 7.56 Mb
Small and medium-sized enterprises (SMEs) are considered particularly vulnerable to crisis situations due to their limited assets and resources as well as their great dependency on local customers. Holistic risk management is critical to the development of resilience in organizations. This book explores this situation by addressing risk management for SMEs holistically with a focus on continuous learning and the development of dynamic capabilities to increase resilience. It provides a broad overview of crisis/risk situations and their possible treatment in theory and practice discussed from different resilience perspectives. Featuring contributions from carefully selected experts, this book explores different types of small businesses and sectors to map the diversity and complexity of small business resilience practices. It not only helps SMEs facilitate rapid recovery from crises, but it also helps managers and professionals look to the future of their business with success by providing them with unique comparative research.

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Medical Medium Cleanse to Heal Healing Plans for Sufferers of Anxiety, Depression, Acne, Eczema, Lyme


Free Download Medical Medium Cleanse to Heal: Healing Plans for Sufferers of Anxiety, Depression, Acne, Eczema, Lyme, Gut Problems, Brain Fog, Weight Issues, Migraines, Bloating, Vertigo, Psoriasis, Cysts, Fatigue, PCOS, Fibroids, UTI, Endometriosis & Autoimmune by Anthony William, Sarah Coomes, Hay House LLC
English | June 01, 2020 | ISBN: B088JLNT51 | 27 hours and 54 minutes | M4B 64 Kbps | 862 Mb
If you think you don’t have any need to do a cleanse – if you’re sure you couldn’t possibly be harboring any toxins in your body – think again. In today’s world, there are poisons and pathogens that threaten our health starting before we’re even born, and they continue to hold us back as we encounter them in our everyday life.
Cleansing is a vital tool for fighting against these burdens – as long as you go about it the right way. That’s why you need this audiobook. Anthony William, the Medical Medium, has placed a vast wealth of insight and information into a one-stop resource for cleansing of all kinds, starting with his acclaimed nine-day 3:6:9 Cleanse and expanding into life-saving protocols for specific health needs – including an anti-bug cleanse, a morning cleanse, and a heavy metal detox.
You’ll discover

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