Spectral Bounds for the Connectivity of Regular Graphs with Given Order

The second-largest eigenvalue and second-smallest Laplacian eigenvalue of a graph are measures of its connectivity. These eigenvalues can be used to analyze the robustness, resilience, and synchronizability of networks, and are related to connectivity attributes such as the vertex- and edge-connectivity, isoperimetric number, and characteristic path length. In this paper, we present two upper bounds for the second-largest eigenvalues of regular graphs and multigraphs of a given order which guarantee a desired vertex- or edge-connectivity. The given bounds are in terms of the order and degree of the graphs, and hold with equality for infinite families of graphs. These results answer a question of Mohar.Comment: 24 page

LIPIcs, Volume 261, ICALP 2023, Complete Volume

LIPIcs, Volume 261, ICALP 2023, Complete Volum

LIPIcs, Volume 274, ESA 2023, Complete Volume

LIPIcs, Volume 274, ESA 2023, Complete Volum

LIPIcs, Volume 244, ESA 2022, Complete Volume

LIPIcs, Volume 244, ESA 2022, Complete Volum

The history of coppicing in south east England in the modern period with special reference to the chestnut industry of Kent and Sussex

This thesis focuses on coppice woodland management in South East England, the region with the greatest concentration of woodland in the UK, with Kent the county with the highest proportion of ancient semi-natural broadleaved woodland. The woodland management practice of coppicing has declined, particularly since the Second World War, generally attributed to loss of markets for products fashioned from small diameter roundwood. This thesis begins by asking questions about the decline in the coppice industry particularly the extent of the decline and the significance this has for ecology and landscape, as well for the livelihoods of both woodland owners and the workforce. This is set in context by a review of the historical background, focusing on the modern period, the previous research into the industry, and the changes in policy that have taken place over the last fifty years. The evidence for the decline and the attempts that have been made to address it are evaluated. A series of investigations have been undertaken, including interviews, questionnaires and focus groups. These provide evidence that coppicing is still taking place over a wide area, and that there is a strong demand for products, both here and abroad, particularly for chestnut fencing. Claims by earlier researchers that the workforce is diminishing, with the majority nearing retirement, are refuted. Profiling the workforce has revealed the existence of separate groups, with distinct characteristics. These do not operate in the same way, indicating that considering the industry as a single entity is no longer valid. The importance of the chestnut workers, with a craft tradition handed down through the generations should be acknowledged. The current political context highlights the importance of involving all stakeholders in decision making. Recommendations are made for further research to incorporate this and so enable more successful development of the coppice industry in the future, whether this is for environmental, economic or social reasons

Stable Isotopes in Tree Rings

This Open Access volume highlights how tree ring stable isotopes have been used to address a range of environmental issues from paleoclimatology to forest management, and anthropogenic impacts on forest growth. It will further evaluate weaknesses and strengths of isotope applications in tree rings. In contrast to older tree ring studies, which predominantly applied a pure statistical approach this book will focus on physiological mechanisms that influence isotopic signals and reflect environmental impacts. Focusing on connections between physiological responses and drivers of isotope variation will also clarify why environmental impacts are not linearly reflected in isotope ratios and tree ring widths. This volume will be of interest to any researcher and educator who uses tree rings (and other organic matter proxies) to reconstruct paleoclimate as well as to understand contemporary functional processes and anthropogenic influences on native ecosystems. The use of stable isotopes in biogeochemical studies has expanded greatly in recent years, making this volume a valuable resource to a growing and vibrant community of researchers

Anatomy of a hostage rescue: what makes hostage rescue operations successful?

This thesis develops a theory to determine the best execution time to conduct a hostage rescue attempt. It does so by explaining the phenomenon of a hostage crisis biorhythm and proposing four principles essential for success. The principles of hostage rescue operations presented in this thesis and used in the biorhythm model-surprise, intelligence, operator's skill, and deception-are derived from looking at numerous planning models from special operations, from personal experience, and the thorough analysis of six historical cases. The historical cases show that in every instance any one of these four principles was overlooked, the operation was doomed. These principles have been determined to be the most critical factors that change as the crisis develops throughout the hostage ordeal. A thorough understanding of this biorhythm will provide planning guidelines to assess the best windows of opportunity for a proposed rescue attempt. One main focus of this work will be an in-depth case study of the hostage rescue operation "CHAVIN DE HUANTAR". This case study will present compelling evidence to reinforce my hypothesis, and serves as a template model for successful rescue operations. The analysis of this single case will provide a wealth of information on the success of this remarkable operation. Another main focus of this thesis will be strategic thinking of a hostage crisis using game theory analysis. The findings of this thesis will enable decision-makers to plan and organize hostage rescue forces to act at the appropriate time (window of opportunity), maximizing their chances of success. Additionally, it will provide a useful planning model that can be implemented effectively and accurately, presenting a clear picture of possible outcomes throughout a hostage crisis. Furthermore, this thesis will help the reader become a better strategist during the planning, preparation, and execution of a hostage rescue operation. It will provide a thorough understanding of how these operations work, how to solve them successfully, and how to predict possible outcomes at different stages of the operation applying the principles of game theory.http://archive.org/details/anatomyofhostage109451367Major, United States ArmyApproved for public release; distribution is unlimited.Approved for public release; distribution is unlimited

ESSE 2017. Proceedings of the International Conference on Environmental Science and Sustainable Energy

Environmental science is an interdisciplinary academic field that integrates physical-, biological-, and information sciences to study and solve environmental problems. ESSE - The International Conference on Environmental Science and Sustainable Energy provides a platform for experts, professionals, and researchers to share updated information and stimulate the communication with each other. In 2017 it was held in Suzhou, China June 23-25, 2017

Collected Papers (on Neutrosophic Theory and Applications), Volume VII

This seventh volume of Collected Papers includes 70 papers comprising 974 pages on (theoretic and applied) neutrosophics, written between 2013-2021 by the author alone or in collaboration with the following 122 co-authors from 22 countries: Mohamed Abdel-Basset, Abdel-Nasser Hussian, C. Alexander, Mumtaz Ali, Yaman Akbulut, Amir Abdullah, Amira S. Ashour, Assia Bakali, Kousik Bhattacharya, Kainat Bibi, R. N. Boyd, Ümit Budak, Lulu Cai, Cenap Özel, Chang Su Kim, Victor Christianto, Chunlai Du, Chunxin Bo, Rituparna Chutia, Cu Nguyen Giap, Dao The Son, Vinayak Devvrat, Arindam Dey, Partha Pratim Dey, Fahad Alsharari, Feng Yongfei, S. Ganesan, Shivam Ghildiyal, Bibhas C. Giri, Masooma Raza Hashmi, Ahmed Refaat Hawas, Hoang Viet Long, Le Hoang Son, Hongbo Wang, Hongnian Yu, Mihaiela Iliescu, Saeid Jafari, Temitope Gbolahan Jaiyeola, Naeem Jan, R. Jeevitha, Jun Ye, Anup Khan, Madad Khan, Salma Khan, Ilanthenral Kandasamy, W.B. Vasantha Kandasamy, Darjan Karabašević, Kifayat Ullah, Kishore Kumar P.K., Sujit Kumar De, Prasun Kumar Nayak, Malayalan Lathamaheswari, Luong Thi Hong Lan, Anam Luqman, Luu Quoc Dat, Tahir Mahmood, Hafsa M. Malik, Nivetha Martin, Mai Mohamed, Parimala Mani, Mingcong Deng, Mohammed A. Al Shumrani, Mohammad Hamidi, Mohamed Talea, Kalyan Mondal, Muhammad Akram, Muhammad Gulistan, Farshid Mofidnakhaei, Muhammad Shoaib, Muhammad Riaz, Karthika Muthusamy, Nabeela Ishfaq, Deivanayagampillai Nagarajan, Sumera Naz, Nguyen Dinh Hoa, Nguyen Tho Thong, Nguyen Xuan Thao, Noor ul Amin, Dragan Pamučar, Gabrijela Popović, S. Krishna Prabha, Surapati Pramanik, Priya R, Qiaoyan Li, Yaser Saber, Said Broumi, Saima Anis, Saleem Abdullah, Ganeshsree Selvachandran, Abdulkadir Sengür, Seyed Ahmad Edalatpanah, Shahbaz Ali, Shahzaib Ashraf, Shouzhen Zeng, Shio Gai Quek, Shuangwu Zhu, Shumaiza, Sidra Sayed, Sohail Iqbal, Songtao Shao, Sundas Shahzadi, Dragiša Stanujkić, Željko Stević, Udhayakumar Ramalingam, Zunaira Rashid, Hossein Rashmanlou, Rajkumar Verma, Luige Vlădăreanu, Victor Vlădăreanu, Desmond Jun Yi Tey, Selçuk Topal, Naveed Yaqoob, Yanhui Guo, Yee Fei Gan, Yingcang Ma, Young Bae Jun, Yuping Lai, Hafiz Abdul Wahab, Wei Yang, Xiaohong Zhang, Edmundas Kazimieras Zavadskas, Lemnaouar Zedam