Munson Edward R (11 results)

First 4to, stiff pictorial wrappers. 166 pp, 127 illustrations (10 in color), index. Exhibition January 13 - March 2, 1980. Very good.

Paperback. Condition: new. Paperback. The goal is not simply to memorize commands. It is to develop an understanding that helps you decide which operation to use, when to use it, and what happens when PySpark executes it. ## What if you already know Python? Then you have an excellent foundation to build upon. This book helps connect familiar Python programming ideas with distributed data processing. You will see how Python code can be used to describe operations on large datasets while PySpark handles the underlying distributed execution. You will also learn why some approaches that work well with small datasets may become inefficient when data volume increases. That distinction matters. Writing code that produces the correct result is one skill. Understanding how that code behaves when the dataset becomes much larger is another. What about DataFrames? DataFrames receive significant attention because they provide a structured way to work with distributed data. You will learn how to create DataFrames, define schemas, inspect their structure, select columns, create calculated fields, filter records, sort results, handle missing values, perform aggregations, join related datasets, and save processed information. You will also learn how DataFrame operations connect with PySpark's execution process, giving you a better understanding of what happens beyond the Python code you write. The current PySpark API provides extensive DataFrame functionality for operations such as select, filter, groupBy, join, orderBy, cache, repartition, write, and related processing tasks. ([Apache Spark][2]) ## What if your data is messy? Real datasets are rarely perfect. A practical data-processing workflow may contain missing values, malformed numbers, inconsistent text, duplicate records, unexpected dates, invalid identifiers, or incomplete relationships between datasets. This book addresses those situations directly. You will learn how to identify problematic records, standardize information, validate values, separate invalid data when appropriate, and build repeatable cleaning processes rather than relying on one-time manual corrections. ## How do joins, aggregations, and window functions fit together? As your skills develop, the book moves beyond basic transformations. You will learn how separate datasets can be connected through joins, how grouped information can be summarized through aggregations, and how window functions can provide analytical calculations while preserving individual records. You will work with concepts such as customer totals, transaction summaries, rankings, running calculations, previous and subsequent records, and other analytical patterns. This helps turn PySpark from a collection of commands into a practical tool for building complete data-processing workflows. ## What happens when your application becomes slow? Correct results are important, but performance matters too. The book introduces the concepts that influence PySpark performance, including partitions, shuffles, data movement, joins, aggregation, caching, partition imbalance, data skew, memory usage, and execution plans. You will learn why some operations require substantial data movement and why reducing unnecessary work can make a significant difference. You will also learn how to approach performance problems systematically instead of simply adding more resources and hoping the application becomes faster. ## Can PySpark handle more than batch processing? Yes, and the book introduces that broader picture. You will explore structured streaming concepts, including streaming DataFrames, output modes, checkpoints, event-time processing, windows, and late-arriving data. This item Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

Paperback. Condition: new. Paperback. The goal is not simply to memorize commands. It is to develop an understanding that helps you decide which operation to use, when to use it, and what happens when PySpark executes it. ## What if you already know Python? Then you have an excellent foundation to build upon. This book helps connect familiar Python programming ideas with distributed data processing. You will see how Python code can be used to describe operations on large datasets while PySpark handles the underlying distributed execution. You will also learn why some approaches that work well with small datasets may become inefficient when data volume increases. That distinction matters. Writing code that produces the correct result is one skill. Understanding how that code behaves when the dataset becomes much larger is another. What about DataFrames? DataFrames receive significant attention because they provide a structured way to work with distributed data. You will learn how to create DataFrames, define schemas, inspect their structure, select columns, create calculated fields, filter records, sort results, handle missing values, perform aggregations, join related datasets, and save processed information. You will also learn how DataFrame operations connect with PySpark's execution process, giving you a better understanding of what happens beyond the Python code you write. The current PySpark API provides extensive DataFrame functionality for operations such as select, filter, groupBy, join, orderBy, cache, repartition, write, and related processing tasks. ([Apache Spark][2]) ## What if your data is messy? Real datasets are rarely perfect. A practical data-processing workflow may contain missing values, malformed numbers, inconsistent text, duplicate records, unexpected dates, invalid identifiers, or incomplete relationships between datasets. This book addresses those situations directly. You will learn how to identify problematic records, standardize information, validate values, separate invalid data when appropriate, and build repeatable cleaning processes rather than relying on one-time manual corrections. ## How do joins, aggregations, and window functions fit together? As your skills develop, the book moves beyond basic transformations. You will learn how separate datasets can be connected through joins, how grouped information can be summarized through aggregations, and how window functions can provide analytical calculations while preserving individual records. You will work with concepts such as customer totals, transaction summaries, rankings, running calculations, previous and subsequent records, and other analytical patterns. This helps turn PySpark from a collection of commands into a practical tool for building complete data-processing workflows. ## What happens when your application becomes slow? Correct results are important, but performance matters too. The book introduces the concepts that influence PySpark performance, including partitions, shuffles, data movement, joins, aggregation, caching, partition imbalance, data skew, memory usage, and execution plans. You will learn why some operations require substantial data movement and why reducing unnecessary work can make a significant difference. You will also learn how to approach performance problems systematically instead of simply adding more resources and hoping the application becomes faster. ## Can PySpark handle more than batch processing? Yes, and the book introduces that broader picture. You will explore structured streaming concepts, including streaming DataFrames, output modes, checkpoints, event-time processing, windows, and late-arriving data. < Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…

Paperback. Condition: New. Print on Demand. This book presents the proceedings of the 25th Annual Meeting of the Association of Military Surgeons of the United States, held in Fort Benjamin Harrison, Indiana in October 1917. The meeting was a momentous occasion, marking the largest attendance in the association's history and demonstrating the growing importance of the organization in the midst of World War I. The proceedings offer valuable insights into the medical military lessons learned during the war, capturing the expertise and experiences of leading medical officers from the United States, France, and Great Britain. These discussions encompass a wide range of topics, including practical medical lessons, cooperation among different medical services, the challenges of trench warfare, and the psychological impact of war on soldiers. The book is a testament to the dedication and ingenuity of military surgeons during a critical chapter in history, providing valuable lessons for future generations of medical professionals. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Paperback. Condition: New. Print on Demand. This book is a detailed guide to the establishment and administration of medical groups for use when preparing ports of embarkation in time of war or threatened hostilities. It was written by Lieutenant Colonel E. W. Rich, an experienced medical officer, to help others avoid the challenges faced by his medical group in Galveston, Texas during World War I. Drawing on his experience, the author outlines the duties of the group's administrative staff, including sanitary inspectors, medical supply officers, and medical superintendents. The book also explains the importance of collaboration between the medical group and the commander of the port of embarkation and stresses the necessity of understanding weather conditions that could impact hospital and camp locations. This comprehensive guide should be a valuable resource for medical personnel tasked with organizing and leading medical groups in support of military operations. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. …

Taschenbuch. Condition: Neu. Neuware.

Condition: New. Print on Demand.

PAP. Condition: New. New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

PAP. Condition: New. New Book. Delivered from our UK warehouse in 4 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

Leather Bound. Condition: New. Language: English. Language: English. Presenting an Exquisite Leather-Bound Edition, expertly crafted with Original Natural Leather that gracefully adorns the spine and corners. The allure continues with Golden Leaf Printing that adds a touch of elegance, while Hand Embossing on the rounded spine lends an artistic flair. This masterpiece has been meticulously reprinted in 2025, utilizing the invaluable guidance of the original edition published many years ago in 1859. The contents of this book are presented in classic black and white. Its durability is ensured through a meticulous sewing binding technique, enhancing its longevity. Imprinted on top-tier quality paper. A team of professionals has expertly processed each page, delicately preserving its content without alteration. Due to the vintage nature of these books, every page has been manually restored for legibility. However, in certain instances, occasional blurriness, missing segments, or faint black spots might persist. We sincerely hope for your understanding of the challenges we faced with these books. Recognizing their significance for readers seeking insight into our historical treasure, we've diligently restored and reissued them. Our intention is to offer this valuable resource once again. We eagerly await your feedback, hoping that you'll find it appealing and will generously share your thoughts and recommendations. Lang: - English, Vol:- Volume 4, Pages:- 473, Print on Demand. If it is a multi-volume set, then it is only a single volume. We are specialised in Customisation of books, if you wish to opt different color leather binding, you may contact us. This service is chargeable. Product Disclaimer: Kindly be informed that, owing to the inherent nature of leather as a natural material, minor discolorations or textural variations may be perceptible. Explore the FOLIO EDITION (12x19 Inches): Available Upon Request. Volume 4 473 473.…

LeatherBound. Condition: New. BOOKS ARE EXEMPT FROM IMPORT DUTIES AND TARIFFS; NO EXTRA CHARGES APPLY. LeatherBound edition. Condition: New. Reprinted from 1859 edition. Leather Binding on Spine and Corners with Golden leaf printing on spine. NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. Pages: 473 As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Pages: 473 Volume 4 Language: English.…