Author: Hillary Moses Daluz
Publisher: CRC Press
ISBN: 1351043196
Category : Law
Languages : en
Pages : 393
Book Description
Building on the success of the first Edition—the first pure textbook designed specifically for students on the subject—Fundamentals of Fingerprint Analysis, Second Edition provides an understanding of the historical background of fingerprint evidence, and follows it all the way through to illustrate how it is utilized in the courtroom. An essential learning tool for classes in fingerprinting and impression evidence—with each chapter building on the previous one using a pedagogical format—the book is divided into three sections. The first explains the history and theory of fingerprint analysis, fingerprint patterns and classification, and the concept of biometrics—the practice of using unique biological measurements or features to identify individuals. The second section discusses forensic light sources and physical and chemical processing methods. Section three covers fingerprint analysis with chapters on documentation, crime scene processing, fingerprint and palm print comparisons, and courtroom testimony. New coverage to this edition includes such topics as the biometrics and AFIS systems, physiology and embryology of fingerprint development in the womb, digital fingerprint record systems, new and emerging chemical reagents, varieties of fingerprint powders, and more. Fundamentals of Fingerprint Analysis, Second Edition stands as the most comprehensive introductory textbook on the market.
Fundamentals of Fingerprint Analysis, Second Edition
Author: Hillary Moses Daluz
Publisher: CRC Press
ISBN: 1351043196
Category : Law
Languages : en
Pages : 393
Book Description
Building on the success of the first Edition—the first pure textbook designed specifically for students on the subject—Fundamentals of Fingerprint Analysis, Second Edition provides an understanding of the historical background of fingerprint evidence, and follows it all the way through to illustrate how it is utilized in the courtroom. An essential learning tool for classes in fingerprinting and impression evidence—with each chapter building on the previous one using a pedagogical format—the book is divided into three sections. The first explains the history and theory of fingerprint analysis, fingerprint patterns and classification, and the concept of biometrics—the practice of using unique biological measurements or features to identify individuals. The second section discusses forensic light sources and physical and chemical processing methods. Section three covers fingerprint analysis with chapters on documentation, crime scene processing, fingerprint and palm print comparisons, and courtroom testimony. New coverage to this edition includes such topics as the biometrics and AFIS systems, physiology and embryology of fingerprint development in the womb, digital fingerprint record systems, new and emerging chemical reagents, varieties of fingerprint powders, and more. Fundamentals of Fingerprint Analysis, Second Edition stands as the most comprehensive introductory textbook on the market.
Publisher: CRC Press
ISBN: 1351043196
Category : Law
Languages : en
Pages : 393
Book Description
Building on the success of the first Edition—the first pure textbook designed specifically for students on the subject—Fundamentals of Fingerprint Analysis, Second Edition provides an understanding of the historical background of fingerprint evidence, and follows it all the way through to illustrate how it is utilized in the courtroom. An essential learning tool for classes in fingerprinting and impression evidence—with each chapter building on the previous one using a pedagogical format—the book is divided into three sections. The first explains the history and theory of fingerprint analysis, fingerprint patterns and classification, and the concept of biometrics—the practice of using unique biological measurements or features to identify individuals. The second section discusses forensic light sources and physical and chemical processing methods. Section three covers fingerprint analysis with chapters on documentation, crime scene processing, fingerprint and palm print comparisons, and courtroom testimony. New coverage to this edition includes such topics as the biometrics and AFIS systems, physiology and embryology of fingerprint development in the womb, digital fingerprint record systems, new and emerging chemical reagents, varieties of fingerprint powders, and more. Fundamentals of Fingerprint Analysis, Second Edition stands as the most comprehensive introductory textbook on the market.
Fundamentals of Fingerprint Analysis
Author: Hillary Moses Daluz
Publisher: CRC Press
ISBN: 1466597976
Category : Law
Languages : en
Pages : 344
Book Description
The "CSI effect" has brought an explosion of interest in the forensic sciences, leading to the development of new programs in universities across the world. While dozens of professional texts on the science of fingerprint analysis are available, few are designed specifically for students. An essential learning tool for classes in fingerprinting and impression evidence, Fundamentals of Fingerprint Analysis takes students from an understanding of the historical background of fingerprint evidence to seeing how it plays out in a present-day courtroom. Using a pedagogical format, with each chapter building on the previous one, the book is divided into three sections. The first explains the history and theory of fingerprint analysis, fingerprint patterns and classification, and the concept of biometrics—the practice of using unique biological measurements or features to identify individuals. The second section discusses forensic light sources and physical and chemical processing methods. Section Three covers fingerprint analysis with chapters on documentation, crime scene processing, fingerprint and palm print comparisons, and courtroom testimony. Designed for classroom use, each chapter contains key terms, learning objectives, a chapter summary, and review questions to test students’ assimilation of the material. Ample diagrams, case studies, and photos demonstrate concepts in a way that prepares students for working actual cases.
Publisher: CRC Press
ISBN: 1466597976
Category : Law
Languages : en
Pages : 344
Book Description
The "CSI effect" has brought an explosion of interest in the forensic sciences, leading to the development of new programs in universities across the world. While dozens of professional texts on the science of fingerprint analysis are available, few are designed specifically for students. An essential learning tool for classes in fingerprinting and impression evidence, Fundamentals of Fingerprint Analysis takes students from an understanding of the historical background of fingerprint evidence to seeing how it plays out in a present-day courtroom. Using a pedagogical format, with each chapter building on the previous one, the book is divided into three sections. The first explains the history and theory of fingerprint analysis, fingerprint patterns and classification, and the concept of biometrics—the practice of using unique biological measurements or features to identify individuals. The second section discusses forensic light sources and physical and chemical processing methods. Section Three covers fingerprint analysis with chapters on documentation, crime scene processing, fingerprint and palm print comparisons, and courtroom testimony. Designed for classroom use, each chapter contains key terms, learning objectives, a chapter summary, and review questions to test students’ assimilation of the material. Ample diagrams, case studies, and photos demonstrate concepts in a way that prepares students for working actual cases.
Fingerprint Analysis Laboratory Workbook, Second Edition
Author: Hillary Moses Daluz
Publisher: CRC Press
ISBN: 1351042173
Category : Law
Languages : en
Pages : 135
Book Description
Fingerprint collection and analysis may be performed as part of many jobs, including crime scene technician, latent print examiner, criminalist, and lab supervisor. Regardless of one’s specific background or role in the process, a knowledge of scientific practices is critical in handling and analyzing fingerprint evidence. The best way to understand the principles and concepts of any science learned in a classroom is to perform experiments. The exercises in Fingerprint Analysis Laboratory Workbook, Second Edition address all aspects of fingerprint theory, investigation, processing, comparisons, and research. Designed specifically to parallel the Fundamentals of Fingerprint Analysis, Second Edition textbook, the laboratory exercises correspond with the textbook chapters, with exercise in the lab chapter putting into practice the concepts covered in the text chapter. Each lab follows the same format, beginning with the objectives of the experiment and providing the background information necessary to perform the experiment. This is followed by a list of required materials, the lab exercises, and post-lab questions for students to test what they’ve learned. Many of the laboratory exercises may be completed either at home or in a laboratory setting. Exercises and photographs enhance the text, making it an ideal hands-on learning tool. New techniques and current practices added to the primary textbook have been included in this companion laboratory workbook to cover the latest in real-world application of fingerprint analysis science to practice.
Publisher: CRC Press
ISBN: 1351042173
Category : Law
Languages : en
Pages : 135
Book Description
Fingerprint collection and analysis may be performed as part of many jobs, including crime scene technician, latent print examiner, criminalist, and lab supervisor. Regardless of one’s specific background or role in the process, a knowledge of scientific practices is critical in handling and analyzing fingerprint evidence. The best way to understand the principles and concepts of any science learned in a classroom is to perform experiments. The exercises in Fingerprint Analysis Laboratory Workbook, Second Edition address all aspects of fingerprint theory, investigation, processing, comparisons, and research. Designed specifically to parallel the Fundamentals of Fingerprint Analysis, Second Edition textbook, the laboratory exercises correspond with the textbook chapters, with exercise in the lab chapter putting into practice the concepts covered in the text chapter. Each lab follows the same format, beginning with the objectives of the experiment and providing the background information necessary to perform the experiment. This is followed by a list of required materials, the lab exercises, and post-lab questions for students to test what they’ve learned. Many of the laboratory exercises may be completed either at home or in a laboratory setting. Exercises and photographs enhance the text, making it an ideal hands-on learning tool. New techniques and current practices added to the primary textbook have been included in this companion laboratory workbook to cover the latest in real-world application of fingerprint analysis science to practice.
Fingerprints
Author: Mark R. Hawthorne
Publisher: CRC Press
ISBN: 1000336441
Category : Law
Languages : en
Pages : 170
Book Description
Fingerprints: Analysis and Understanding the Science, Second Edition is a thorough update of Mark Hawthorne’s classic written by two professionals with combined experience not only in crime scene investigations but also as court-recognized experts in latent print examination. Designed as a concise text to cover the fundamental techniques and principles of obtaining and analyzing latent fingerprint evidence, the book is laid out and written in an easy to understand format for those front-line professionals collecting and analyzing fingerprint evidence. Over time, the degree of sophistication and education on fingerprints and friction ridge analysis has increased. Ultimately, through scientific study by pioneers in the field, the composition of friction skin soon became evident: that it could be used as a unique identifier of individuals. Now, fingerprints and footprints as unique identifiers—and their use in criminal cases—have become commonplace and an essential component of criminal investigation with most cases involving some component of fingerprint evidence. Divided into two parts, the book begins with the basics of analysis, providing a brief history, systematic methods of identification, fingerprint pattern types and their associated terminologies and current classifications. The second part of the book discusses the identification and presentation of evidence in the courtroom, demonstrating both the traditional, manual method of lifting prints and the newer techniques for automated and live scans. Coverage provides instruction on searching and developing latent prints, storage, and comparison of prints. New to this edition are updated techniques on collecting and preserving fingerprint evidence—including packaging and maintaining chain of custody. More detailed documentation processes, and additional chemical and lifting techniques, are described including use of light sources, latent backing cards and lifting material, casting material, ten print cards, and the enhancement of prints in blood. A discussion of laboratory equipment and comparison tools, the addition of photography techniques, and recent courtroom challenges to fingerprint evidence is also presented. Fingerprints, Second Edition will provide a hands-on, fresh look at the most commonly utilized evidence found at crime scenes: fingerprints. The book will provide law enforcement, crime scene personnel and students just such an opportunity to easily understand and grasp the concepts, and relevant issues, associated with friction skin and fingerprint evidence.
Publisher: CRC Press
ISBN: 1000336441
Category : Law
Languages : en
Pages : 170
Book Description
Fingerprints: Analysis and Understanding the Science, Second Edition is a thorough update of Mark Hawthorne’s classic written by two professionals with combined experience not only in crime scene investigations but also as court-recognized experts in latent print examination. Designed as a concise text to cover the fundamental techniques and principles of obtaining and analyzing latent fingerprint evidence, the book is laid out and written in an easy to understand format for those front-line professionals collecting and analyzing fingerprint evidence. Over time, the degree of sophistication and education on fingerprints and friction ridge analysis has increased. Ultimately, through scientific study by pioneers in the field, the composition of friction skin soon became evident: that it could be used as a unique identifier of individuals. Now, fingerprints and footprints as unique identifiers—and their use in criminal cases—have become commonplace and an essential component of criminal investigation with most cases involving some component of fingerprint evidence. Divided into two parts, the book begins with the basics of analysis, providing a brief history, systematic methods of identification, fingerprint pattern types and their associated terminologies and current classifications. The second part of the book discusses the identification and presentation of evidence in the courtroom, demonstrating both the traditional, manual method of lifting prints and the newer techniques for automated and live scans. Coverage provides instruction on searching and developing latent prints, storage, and comparison of prints. New to this edition are updated techniques on collecting and preserving fingerprint evidence—including packaging and maintaining chain of custody. More detailed documentation processes, and additional chemical and lifting techniques, are described including use of light sources, latent backing cards and lifting material, casting material, ten print cards, and the enhancement of prints in blood. A discussion of laboratory equipment and comparison tools, the addition of photography techniques, and recent courtroom challenges to fingerprint evidence is also presented. Fingerprints, Second Edition will provide a hands-on, fresh look at the most commonly utilized evidence found at crime scenes: fingerprints. The book will provide law enforcement, crime scene personnel and students just such an opportunity to easily understand and grasp the concepts, and relevant issues, associated with friction skin and fingerprint evidence.
Courtroom Testimony for Fingerprint Examiners
Author: Hillary Moses Daluz
Publisher: CRC Press
ISBN: 1000421589
Category : Political Science
Languages : en
Pages : 267
Book Description
Presents a history of fingerprint evidence and current best practices and limits on characterizing fingerprint evidence in court The first book to focus solely on testifying on fingerprint evidence as a comparative science Provides current guidelines and recommendations for standards and appropriate nomenclature in the courtroom Illustrates how experts can work with attorneys so that the testimony process educates and informs jurors and judges, rather than perpetuating an adversarial dynamic Addresses important issues such as cognitive bias, subjectivity, error rates, probability models, and ethics
Publisher: CRC Press
ISBN: 1000421589
Category : Political Science
Languages : en
Pages : 267
Book Description
Presents a history of fingerprint evidence and current best practices and limits on characterizing fingerprint evidence in court The first book to focus solely on testifying on fingerprint evidence as a comparative science Provides current guidelines and recommendations for standards and appropriate nomenclature in the courtroom Illustrates how experts can work with attorneys so that the testimony process educates and informs jurors and judges, rather than perpetuating an adversarial dynamic Addresses important issues such as cognitive bias, subjectivity, error rates, probability models, and ethics
Forensic Fingerprints
Author: Max M. Houck
Publisher: Academic Press
ISBN: 0128006722
Category : Law
Languages : en
Pages : 210
Book Description
Forensic Fingerprints, the latest in the Advanced Forensic Science Series which grew out of the recommendations from the 2009 NAS Report: Strengthening Forensic Science: A Path Forward, serves as a graduate level text for those studying and teaching fingerprint detection and analysis, and will also prove to be an excellent reference for forensic practitioner libraries and for use in casework. Coverage includes fingerprint science, friction ridge print examination, AFIS, foot and palm prints, and the professional issues practitioners may encounter. Edited by a world-renowned leading forensic expert, this book is a long overdue solution for the forensic science community. - Provides basic principles of forensic science and an overview of interpretation and comparative methods - Contains information on the chemistry of print residue and the visualization of latent prints - Covers fingerprint science, friction ridge print examination, AFIS, and foot and palm prints - Includes a section on professional issues, from crime scene to court, lab reports, health and safety, and certification - Incorporates effective pedagogy, key terms, review questions, discussion questions, and additional reading suggestions
Publisher: Academic Press
ISBN: 0128006722
Category : Law
Languages : en
Pages : 210
Book Description
Forensic Fingerprints, the latest in the Advanced Forensic Science Series which grew out of the recommendations from the 2009 NAS Report: Strengthening Forensic Science: A Path Forward, serves as a graduate level text for those studying and teaching fingerprint detection and analysis, and will also prove to be an excellent reference for forensic practitioner libraries and for use in casework. Coverage includes fingerprint science, friction ridge print examination, AFIS, foot and palm prints, and the professional issues practitioners may encounter. Edited by a world-renowned leading forensic expert, this book is a long overdue solution for the forensic science community. - Provides basic principles of forensic science and an overview of interpretation and comparative methods - Contains information on the chemistry of print residue and the visualization of latent prints - Covers fingerprint science, friction ridge print examination, AFIS, and foot and palm prints - Includes a section on professional issues, from crime scene to court, lab reports, health and safety, and certification - Incorporates effective pedagogy, key terms, review questions, discussion questions, and additional reading suggestions
Automatic Fingerprint Recognition Systems
Author: Nalini Ratha
Publisher: Springer Science & Business Media
ISBN: 0387955933
Category : Computers
Languages : en
Pages : 466
Book Description
An authoritative survey of intelligent fingerprint-recognition concepts, technology, and systems is given. Editors and contributors are the leading researchers and applied R&D developers of this personal identification (biometric security) topic and technology. Biometrics and pattern recognition researchers and professionals will find the book an indispensable resource for current knowledge and technology in the field.
Publisher: Springer Science & Business Media
ISBN: 0387955933
Category : Computers
Languages : en
Pages : 466
Book Description
An authoritative survey of intelligent fingerprint-recognition concepts, technology, and systems is given. Editors and contributors are the leading researchers and applied R&D developers of this personal identification (biometric security) topic and technology. Biometrics and pattern recognition researchers and professionals will find the book an indispensable resource for current knowledge and technology in the field.
Fundamentals of Forensic DNA Typing
Author: John M. Butler
Publisher: Academic Press
ISBN: 0080961762
Category : Law
Languages : en
Pages : 519
Book Description
Fundamentals of Forensic DNA Typing is written with a broad viewpoint. It examines the methods of current forensic DNA typing, focusing on short tandem repeats (STRs). It encompasses current forensic DNA analysis methods, as well as biology, technology and genetic interpretation. This book reviews the methods of forensic DNA testing used in the first two decades since early 1980's, and it offers perspectives on future trends in this field, including new genetic markers and new technologies. Furthermore, it explains the process of DNA testing from collection of samples through DNA extraction, DNA quantitation, DNA amplification, and statistical interpretation. The book also discusses DNA databases, which play an important role in law enforcement investigations. In addition, there is a discussion about ethical concerns in retaining DNA profiles and the issues involved when people use a database to search for close relatives. Students of forensic DNA analysis, forensic scientists, and members of the law enforcement and legal professions who want to know more about STR typing will find this book invaluable. - Includes a glossary with over 400 terms for quick reference of unfamiliar terms as well as an acronym guide to decipher the DNA dialect - Continues in the style of Forensic DNA Typing, 2e, with high-profile cases addressed in D.N.A.Boxes-- "Data, Notes & Applications" sections throughout - Ancillaries include: instructor manual Web site, with tailored set of 1000+ PowerPoint slides (including figures), links to online training websites and a test bank with key
Publisher: Academic Press
ISBN: 0080961762
Category : Law
Languages : en
Pages : 519
Book Description
Fundamentals of Forensic DNA Typing is written with a broad viewpoint. It examines the methods of current forensic DNA typing, focusing on short tandem repeats (STRs). It encompasses current forensic DNA analysis methods, as well as biology, technology and genetic interpretation. This book reviews the methods of forensic DNA testing used in the first two decades since early 1980's, and it offers perspectives on future trends in this field, including new genetic markers and new technologies. Furthermore, it explains the process of DNA testing from collection of samples through DNA extraction, DNA quantitation, DNA amplification, and statistical interpretation. The book also discusses DNA databases, which play an important role in law enforcement investigations. In addition, there is a discussion about ethical concerns in retaining DNA profiles and the issues involved when people use a database to search for close relatives. Students of forensic DNA analysis, forensic scientists, and members of the law enforcement and legal professions who want to know more about STR typing will find this book invaluable. - Includes a glossary with over 400 terms for quick reference of unfamiliar terms as well as an acronym guide to decipher the DNA dialect - Continues in the style of Forensic DNA Typing, 2e, with high-profile cases addressed in D.N.A.Boxes-- "Data, Notes & Applications" sections throughout - Ancillaries include: instructor manual Web site, with tailored set of 1000+ PowerPoint slides (including figures), links to online training websites and a test bank with key
Fundamentals of Fingerprint Analysis
Author: Hillary Moses Daluz
Publisher: CRC Press
ISBN: 1466597984
Category : Law
Languages : en
Pages : 336
Book Description
The "CSI effect" has brought an explosion of interest in the forensic sciences, leading to the development of new programs in universities across the world. While dozens of professional texts on the science of fingerprint analysis are available, few are designed specifically for students. An essential learning tool for classes in fingerprinting and impression evidence, Fundamentals of Fingerprint Analysis takes students from an understanding of the historical background of fingerprint evidence to seeing how it plays out in a present-day courtroom. Using a pedagogical format, with each chapter building on the previous one, the book is divided into three sections. The first explains the history and theory of fingerprint analysis, fingerprint patterns and classification, and the concept of biometrics—the practice of using unique biological measurements or features to identify individuals. The second section discusses forensic light sources and physical and chemical processing methods. Section Three covers fingerprint analysis with chapters on documentation, crime scene processing, fingerprint and palm print comparisons, and courtroom testimony. Designed for classroom use, each chapter contains key terms, learning objectives, a chapter summary, and review questions to test students’ assimilation of the material. Ample diagrams, case studies, and photos demonstrate concepts in a way that prepares students for working actual cases.
Publisher: CRC Press
ISBN: 1466597984
Category : Law
Languages : en
Pages : 336
Book Description
The "CSI effect" has brought an explosion of interest in the forensic sciences, leading to the development of new programs in universities across the world. While dozens of professional texts on the science of fingerprint analysis are available, few are designed specifically for students. An essential learning tool for classes in fingerprinting and impression evidence, Fundamentals of Fingerprint Analysis takes students from an understanding of the historical background of fingerprint evidence to seeing how it plays out in a present-day courtroom. Using a pedagogical format, with each chapter building on the previous one, the book is divided into three sections. The first explains the history and theory of fingerprint analysis, fingerprint patterns and classification, and the concept of biometrics—the practice of using unique biological measurements or features to identify individuals. The second section discusses forensic light sources and physical and chemical processing methods. Section Three covers fingerprint analysis with chapters on documentation, crime scene processing, fingerprint and palm print comparisons, and courtroom testimony. Designed for classroom use, each chapter contains key terms, learning objectives, a chapter summary, and review questions to test students’ assimilation of the material. Ample diagrams, case studies, and photos demonstrate concepts in a way that prepares students for working actual cases.
Forensic Science: Fundamentals & Investigations
Author: Anthony J. Bertino
Publisher: Cengage Learning
ISBN: 9781305077119
Category : Science
Languages : en
Pages : 704
Book Description
With today's popular television programs about criminal justice and crime scene investigation and the surge of detective movies and books, students often have a passion for exploring forensic science. Now you can guide that excitement into a profitable learning experience with the help of the innovative, new FORENSIC SCIENCE: FUNDAMENTALS AND INVESTIGATIONS, 2E. This dynamic, visually powerful text has been carefully crafted to ensure solid scientific content and an approach that delivers precisely what you need for your high school course. Now an established best-seller, FORENSIC SCIENCE: FUNDAMENTALS AND INVESTIGATIONS, 2E offers a truly experiential approach that engages students in active learning and emphasizes the application of integrated science in your course. Student materials combine math, chemistry, biology, physics, and earth science with content aligned to the National Science Education Standards, clearly identified by icons. This book balances extensive scientific concepts with hands-on classroom and lab activities, readings, intriguing case studies, and chapter-opening scenarios. The book's exclusive Gale Forensic Science eCollectionTM database provides instant access to hundreds of journals and Internet resources that spark the interest of today's high school students. The new edition includes one new chapter on entomology and new capstone projects that integrate the concepts learned throughout the text. Comprehensive, time-saving teacher support and lab activities deliver exactly what you need to ensure that students receive a solid, integrated science education that keeps readers at all learning levels enthused about science. FORENSIC SCIENCE: FUNDAMENTALS AND INVESTIGATIONS, 2E sets the standard in high school forensic science . . . case closed. Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version.
Publisher: Cengage Learning
ISBN: 9781305077119
Category : Science
Languages : en
Pages : 704
Book Description
With today's popular television programs about criminal justice and crime scene investigation and the surge of detective movies and books, students often have a passion for exploring forensic science. Now you can guide that excitement into a profitable learning experience with the help of the innovative, new FORENSIC SCIENCE: FUNDAMENTALS AND INVESTIGATIONS, 2E. This dynamic, visually powerful text has been carefully crafted to ensure solid scientific content and an approach that delivers precisely what you need for your high school course. Now an established best-seller, FORENSIC SCIENCE: FUNDAMENTALS AND INVESTIGATIONS, 2E offers a truly experiential approach that engages students in active learning and emphasizes the application of integrated science in your course. Student materials combine math, chemistry, biology, physics, and earth science with content aligned to the National Science Education Standards, clearly identified by icons. This book balances extensive scientific concepts with hands-on classroom and lab activities, readings, intriguing case studies, and chapter-opening scenarios. The book's exclusive Gale Forensic Science eCollectionTM database provides instant access to hundreds of journals and Internet resources that spark the interest of today's high school students. The new edition includes one new chapter on entomology and new capstone projects that integrate the concepts learned throughout the text. Comprehensive, time-saving teacher support and lab activities deliver exactly what you need to ensure that students receive a solid, integrated science education that keeps readers at all learning levels enthused about science. FORENSIC SCIENCE: FUNDAMENTALS AND INVESTIGATIONS, 2E sets the standard in high school forensic science . . . case closed. Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version.