Cluster Analysis A Primer Using R

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Cluster Analysis A Primer Using R

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Author : Lior Rokach
language : en
Publisher: World Scientific
Release Date : 2024-10-08

Cluster Analysis A Primer Using R written by Lior Rokach and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-10-08 with Computers categories.

Cluster analysis is a fundamental data analysis task that aims to group similar data points together, revealing the inherent structure and patterns within complex datasets. This book serves as a comprehensive and accessible guide, taking readers on a captivating journey through the foundational principles of cluster analysis.At its core, the book delves deeply into various clustering algorithms, covering partitioning methods, hierarchical methods, and advanced techniques such as mixture density-based clustering, graph clustering, and grid-based clustering. Each method is presented with clear, concise explanations, supported by illustrative examples and hands-on implementations in the R programming language — a popular and powerful tool for data analysis and visualization.Recognizing the importance of cluster validation and evaluation, the book devotes a dedicated chapter to exploring a wide range of internal and external quality criteria, equipping readers with the necessary tools to assess the performance of clustering algorithms. For those eager to stay at the forefront of the field, the book also presents deep learning-based clustering methods, showcasing the remarkable capabilities of neural networks in uncovering hidden structures within complex, high-dimensional data.Whether you are a student seeking to expand your knowledge, a data analyst looking to enhance your toolbox, or a researcher exploring the frontiers of data analysis, this book will provide you with a solid foundation in cluster analysis and empower you to tackle a wide range of data-driven problems.

Immunoparasitology A Unique Interplay Between Host And Pathogen

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Author : Xun Suo
language : en
Publisher: Frontiers Media SA
Release Date : 2020-06-25

Immunoparasitology A Unique Interplay Between Host And Pathogen written by Xun Suo and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-06-25 with categories.

Microbial Communities

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Author : Heribert Insam
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29

Microbial Communities written by Heribert Insam and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.

Research on decomposer communities of terrestrial ecosystems for a long time has focussed on microbial biomass and gross turnover parameters. Recently, more and more attempts are made to look beyond the biomass, and more specifically determine functions and populations on a smaller scale-in time and space. A multitude of techniques is being improved and developed. Garland and Mills (1991) triggered a series of publications on substrate utilization tests in the field of microbial ecology. Despite several promising results for different applications in different laboratories, many problems concerning the assay and the interpretation of results became evident. After individual discussions on the approach with colleagues from various laboratories we started to plan a workshop on the matter. The response on our first circular was extraordinary, and instead of a small workshop it became a meeting with almost 150 participants. The meeting was named 'Substrate use for characterization of microbial communities in terrestrial ecosystems' (SUBMECO) and was held in Innsbruck, Austria, from Oct. 16-18, 1996. The very focussed scope attracted enthusiastic advocates of the approach, and also serious critics. Some of the topics concerned improvements of current inoculation and incubation techniques, ranging from sample pre-treatment, inoculum density and incubation temperature to statistical data handling. New methods for calculating microbial diversity were proposed, as well as bootstrap methods that allow statistics with many variables on a relatively low number of replicates.

The Responses Of Marine Microorganisms Communities And Ecofunctions To Environmental Gradients

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Author : Stefan M. Sievert
language : en
Publisher: Frontiers Media SA
Release Date : 2019-04-05

The Responses Of Marine Microorganisms Communities And Ecofunctions To Environmental Gradients written by Stefan M. Sievert and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-04-05 with categories.

Marine environments are fluid. Microorganisms living in the ocean experience diverse environmental changes over wide spatiotemporal scales. For microorganisms and their communities to survive and function in the ocean, they need to have the capacity to sense, respond to, adapt to and/or withstand periodic and sporadic environmental changes. This eBook collates a variety of recent research reports and theoretical discussions on the ecoenergetic strategies, community structure, biogeochemical and ecosystem functions as well as regulatory processes and mechanisms that marine microorganisms employ in response to environmental gradients and variations.

Pathogens Pathobionts And Autoimmunity

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Author : Linda Ann Spatz
language : en
Publisher: Frontiers Media SA
Release Date : 2021-10-22

Pathogens Pathobionts And Autoimmunity written by Linda Ann Spatz and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-10-22 with Medical categories.

Surviving And Thriving How Crops Perceive And Respond To Temperature Stress

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Author : Zemin Wang
language : en
Publisher: Frontiers Media SA
Release Date : 2025-01-27

Surviving And Thriving How Crops Perceive And Respond To Temperature Stress written by Zemin Wang and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-01-27 with Science categories.

The dramatic temperature fluctuations spurred by climate change inhibit plant growth and threaten crop productivity. Unraveling how plants defend themselves against temperature-stress-induced cellular impairment is not only a crucial fundamental issue but is also of critical importance for agricultural sustainability and food security. Improving crop tolerance to abiotic stress conditions requires a deep understanding of the response of plants to changes in their environment. This response is dependent on early and late signal transduction events that involve important signaling molecules such as reactive oxygen species (ROS), sugars, different plant hormones, and other signaling molecules. It is the integration of these signaling events, mediated by an interplay between ROS, sugars and different plant hormones, that orchestrates the plant response to abiotic stress and drive changes in transcriptomic, metabolic, and proteomic networks that lead to plant acclimation and survival. This Research Topic explores the crops balancing growth and temperature-stress responses, and how these findings can be used to increase crop quality and yield potential.

Taxonomy And Ecology Of Indian Fungi

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Author : K. G. Mukerji
language : en
Publisher: I. K. International Pvt Ltd
Release Date : 2010

Taxonomy And Ecology Of Indian Fungi written by K. G. Mukerji and has been published by I. K. International Pvt Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Science categories.

Fungal world embodies diversified groups which colonize, multiply and survive in nature on many macro- and micro-ecological niches and substrates. Fungi are eukaryotic, achlorophyllous, filamentous or unicellular living organisms which are ubiquitous and cosmopolitan in distribution. Of the estimated 1.5 million fungal species, more than 98,000 fungal species have been described. Approximately 28,000 fungal species are reported from India. The fungi play an important role in biodegradation, recycling of organic matter, pharmaceutical industries, agriculture, medicine, industry, bioremediation, waste management and other activities. In India hardly we have database but for few a books on Indian fungi, compiled from time to time by some mycologists. The present book includes 16 chapters contributed by eminent mycologists. Chapters include data on diversity, taxonomy, ecology and application of Helicosporous fungi, genus Spegazzinia, Rusts and Smuts, Chaetomiaceae, Macrophomina, Rhizoctonia, Russula, wild edible fungi, poisonous mushrooms, insect fungi and other related aspects. This book will be very useful and a valuable addition to the existing literature on the same subject.

Ecology Of Marine Zooplankton And Micronekton In Polar And Sub Polar Areas

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Author : Letterio Guglielmo
language : en
Publisher: Frontiers Media SA
Release Date : 2024-11-01

Ecology Of Marine Zooplankton And Micronekton In Polar And Sub Polar Areas written by Letterio Guglielmo and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-11-01 with Science categories.

The Polar and Subpolar region comprise one of the seven regions in the world, from the Arctic to the Antarctic, the Atlantic, Pacific, and Indian Oceans. Marine biodiversity in the polar and subpolar regions is one of the richest on earth, hosting important populations of crustaceans, pelagic and benthic species that provide resources for the many seabirds and marine mammals that congregate there. However, these ecosystems, as well as their biodiversity, are vulnerable and already affected by the impacts of climate change and other threats. The high climatic dynamics in those areas have already generated strong modifications to the environment, with irreversible losses in biodiversity and diminished ecosystem services that are essential for the whole planet. The current need to study and understand the biodiversity of the world's oceans makes polar and sub-polar areas key regions for taxonomic and ecological studies.

Tumor Microenvironment In Cancer Hallmarks And Therapeutics

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Author : Na Luo
language : en
Publisher: Frontiers Media SA
Release Date : 2023-06-05

Tumor Microenvironment In Cancer Hallmarks And Therapeutics written by Na Luo and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-06-05 with Science categories.

Advanced Crop Improvement Volume 2

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Author : Aamir Raina
language : en
Publisher: Springer Nature
Release Date : 2023-09-07

Advanced Crop Improvement Volume 2 written by Aamir Raina and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-09-07 with Science categories.

As per the reports of FAO, the human population will rise to 9 billion by the end of 2050 and 70% of more food must be produced over the next three decades to feed the additional population. The breeding approaches for crop improvement programs are dependent on the availability and accessibility of genetic variation, either spontaneous or induced by the mutagens. Plant breeders, agronomists, and geneticists are under constant pressure to expand food production by employing innovative breeding strategies to enhance yield, adaptability, nutrition, resistance to biotic and abiotic stresses. In conventional breeding approaches, introgression of genes in crop varieties is laborious and time-consuming. Nowadays, new innovative plant breeding techniques such as molecular breeding and plant biotechnology, supplement the traditional breeding approaches to achieve the desired goals of enhanced food production. With the advent of recent molecular tools like genomics, transgenics, molecular marker-assisted back-crossing, TILLING, Eco-TILLING, gene editing, CRISPR CAS, non-targeted protein abundant comparative proteomics, genome wide association studies have made possible mapping of important QTLs, insertion of transgenes, reduction of linkage drags, and manipulation of genome. In general, conventional and modern plant breeding approaches would be strategically ideal for developing new elite crop varieties to meet the feeding requirement of the increasing world population. This book highlights the latest progress in the field of plant breeding, and their applicability in crop improvement. The basic concept of this 2-volume work is to assess the use of modern breeding strategies in supplementing the conventional breeding toward the development of elite crop varieties, for obtaining desired goals of food production.