Fundamentals of Big Data Network Analysis for Research and Industry
By Hyunjoung Lee and Il Sohn
()
About this ebook
Presents the methodology of big data analysis using examples from research and industry
There are large amounts of data everywhere, and the ability to pick out crucial information is increasingly important. Contrary to popular belief, not all information is useful; big data network analysis assumes that data is not only large, but also meaningful, and this book focuses on the fundamental techniques required to extract essential information from vast datasets.
Featuring case studies drawn largely from the iron and steel industries, this book offers practical guidance which will enable readers to easily understand big data network analysis. Particular attention is paid to the methodology of network analysis, offering information on the method of data collection, on research design and analysis, and on the interpretation of results. A variety of programs including UCINET, NetMiner, R, NodeXL, and Gephi for network analysis are covered in detail.
Fundamentals of Big Data Network Analysis for Research and Industry looks at big data from a fresh perspective, and provides a new approach to data analysis.
This book:
- Explains the basic concepts in understanding big data and filtering meaningful data
- Presents big data analysis within the networking perspective
- Features methodology applicable to research and industry
- Describes in detail the social relationship between big data and its implications
- Provides insight into identifying patterns and relationships between seemingly unrelated big data
Fundamentals of Big Data Network Analysis for Research and Industry will prove a valuable resource for analysts, research engineers, industrial engineers, marketing professionals, and any individuals dealing with accumulated large data whose interest is to analyze and identify potential relationships among data sets.
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Book preview
Fundamentals of Big Data Network Analysis for Research and Industry - Hyunjoung Lee
1
Why Big Data?
There is an enormous amount of data. The increase in unfiltered data that has accumulated so rapidly includes an increase in needless data, which musdt be removed to allow more efficient and unbiased analyses. This requires an ability to extract correct and useful information from the data. Thus, by correctly distinguishing the gems
from the pebbles,
Big Data analysis would assist an enterprise in obtaining a wider view when starting with a comparably narrow view. Because Big Data bases its significance in the expansion of thought, it is not about volume, velocity, or variety of data but rather about an alternative perspective and viewpoint with respect to the data. If you want to see a forest, you should not leave the forest you should climb to the top of a mountain. Likewise, to obtain meaningful insight from Big Data, we should attempt to broaden our perspective from a bird’s eye view. The higher the altitude, the wider is the vision that can be obtained. To see the outside that was never observed from the inside, a different perspective is required to see the forest, and that is where Big Data steps in.
1.1 Big Data
There has been a significant influx of interest in Big Data. Gartner, one of the top marketing analysis institutions in the world, has selected Big Data as one of the top 10 strategic technologies [1] in both 2012 and 2013; in 2014, it selected Big Data and Actionable Analytics as the core strategy technology for smart governance [2]. Further, every January at Davos, global political and economic leaders gather at the World Economic Forum to discuss world issues, At the so-called Davos Forum 2012 [3], Big Data was again selected as one of the 10 technologies that have emerged as crucial for future developments. Although we are currently confronted by a financial crisis and partial recovery, along with issues related to climate change, energy, poverty, and security, the selection of Big Data seems to indicate that solutions to global issues require a broad range and amount of data, and the technology to effectively manage and extract useful data is expected to provide much-needed insight into resolving some of these potentially catastrophic global issues.
Of course, when we first encounter Big Data, we focus most of our attention on the word Big
and become engrossed with the image of a giant being. In reality, however, Big Data is more closely associated with enormity and numberlessness. The term Big Data was defined and widely disseminated by Meta Group (now Gartner) analyst Doug Laney in 2001 to address issues and opportunities in the three dimensions of the rapid data expansion, including data volume, velocity of input/output data, and variety of data type [4]. The concept of Big Data attracting widespread interest in the 2000s can be correlated with the global proliferation of the Internet and the need to analyze the enormous amount data that it generates. The importance of analyzing massive data and converting them into useful information cannot be overstated. Next, a dimension dealing with value
should be added to the existing three dimensions of data. If Big Data is large, expressed in real time similar to streaming, and includes unstructured data such as text, images, and videos, combining these different types of data and creating value are important. Thus, the amount of reserves is important, whereas the size of the mine is unimportant. The researcher does not need data; he or she needs information. Big Data addresses the size of the data; fundamentally, however, it is more important to analyze and produce meaningful data.
To be considered as Big Data, the data volume must be large in the data set. Although there is no specific size limit that defines Big Data, typically the data set would be a few terabytes for small data sets to as much as a few petabytes for large data sets. Table 1.1 indicates the current data sizes, with the prefixes of peta-, exa-, zetta-, yotta-, bronto-, and geop- used to express the amount of data [5]. If we were to express the amount of data in the books contained in the Library of Congress (in Washington, DC), the total would be about ~15 TB. Through 2012, the human race has accumulated a wealth of data totaling 1.27 ZB. Thus, 1 GpB would suggest an amount of data that is difficult to fathom and would describe an enormous amount of data that are created and distributed.
Table 1.1 Data size.