
The Essential Guide to Planet Earth
Benjamin J. Burger
Every moment of your life will be from the perspective of a single planet— Planet Earth. You were born here and you will die here. This textbook is a guide to your home, to your place in the universe. By taking this course, you will learn about your home planet. How it works and how we know it works this way. This course is an usersmanual for planet Earth, with direct recommendations for future generations such as yourself to maintain its health and natural wonders.

Introduction to Classical Field Theory
Charles G. Torre
This is an introduction to classical field theory. Topics treated include: KleinGordon field, electromagnetic field, scalar electrodynamics, Dirac field, YangMills field, gravitational field, Noether theorems relating symmetries and conservation laws, spontaneous symmetry breaking, Lagrangian and Hamiltonian formalisms.

Applied Mathematical Programming
ManKeun Kim, Bruce A. McCarl, and Thomas H. Spreen
This book is intended to both serve as a reference guide and a text for a course on Applied Mathematical Programming for upper undergraduate and Master level students in Economics, Applied Economics, Agricultural and Resource Economics, and Management; primarily based on McCarl and Spreen (2013). The material presented in McCarl and Spreen (2013) concentrates upon conceptual issues, problem formulation, computerized problem solution, and results interpretation; it is designed for the advanced readers who are familiar with mathematical economics including linear and matrix algebra and also with advanced modeling skills. Upper level undergraduate and/or Master students may not be beneficial from the book.
This booklet is intended to serve as an introductory guide and covers very basics of conceptual issues in mathematical programming and explores problem formulation with applied issues in decision making. Advanced topics including solution algorithms will be discussed only to the extent necessary to build the model and interpret solutions.

Writing for Electronic Media
Brian Champagne, Kiera Farimond, and Brianna Bodily
Introduction
Welcome to Writing for Electronic Media, an OER textbook. OER stands for Open Educational Resource, which means it’s free for all who access. Since it is electronic, I will do what I can to keep it updated with the changing media. People’s viewing habits are changing as they migrate to mobile sources, social media, and kitten videos. Television News is still a dominant #1 source, and radio is still the safest way to stay informed in your car. Hopefully, you already have some journalism background. This book does not teach the who, what, when, where, why, and how of reporting; its goal is to teach how to present the journalism you already know via electronic media, primarily television.

Mythology Unbound: An Online Textbook for Classical Mythology
Jessica Mellenthin and Susan O. Shapiro
Descriptions of figures found in classical mythology.
There are actually many different types of myth, not just three. In fact, there are several entire theories of myth. The theoretical study of myth is very complex; many books have been written about theories of myth, and we could have an entire class just on theories of myth (without studying any of the myths themselves). The problem with theories of myth, however, is that they are not very good; they don’t do a great job of explaining the myths or in helping us understand them. Furthermore, the myths themselves are much more interesting than the theories. For this reason, this textbook will not say very much about the theories of myth. But we don’t want to ignore the theoretical study of myth entirely, so we will limit ourselves to discussing only three types of myth.

Speaking of Culture
Nolan Weil
The title of this book is Speaking of Culture and its purpose is to define culture and many other concepts associated with it. My hope is that the readings in this book will help you to better understand the breadth of the concept of culture and provide you with a vocabulary for discussing it more articulately.
Culture is one of those broad concepts that is used widely, although somewhat imprecisely, in everyday English. It also cuts across many academic disciplines, and this book draws on many of them. It touches, for instance, on anthropology, biology, history, mythology, political science, psychology, and sociology.

An Introduction to Differential Geometry through Computation
Mark E. Fels
The outline of the book is as follows. Chapter 1 reviews some basic facts about smooth functions from IR^{n} to IR^{m}, as well as the basic facts about vector spaces, basis, and algebras. Chapter 2 introduces tangent vectors and vector fields in IR^{n} using the standard two approaches with curves and derivations. Chapter 3 reviews linear transformations and their matrix representation so that in Chapter 4 the pushforward as an abstract linear transformation can be defined and its matrix representation as the Jacobian can be derived. As an application, the change of variable formula for vector fields is derived in Chapter 4. Chapter 5 develops the linear algebra of the dual space and the space of bilinear functions and demonstrates how these concepts are used in defining differential oneforms and metric tensor fields. Chapter 6 introduces the pullback map on oneforms and metric tensors from which the important concept of isometries is then defined. Chapter 7 investigates hypersurfaces in IR^{n}, using patches and defines the induced metric tensor from Euclidean space. The change of coordinate formula on overlaps is then derived. Chapter 8 returns to IR^{n} to define a flow and investigates the relationship between a flow and its infinitesimal generator. The theory of flow invariants is then investigated both infinitesimally and from the flow point of view with the goal of proving the rectification theorem for vector fields. Chapter 9 investigates the Lie bracket of vectorfields and Killing vectors for a metric. Chapter 10 generalizes chapter 8 and introduces the general notion of a group action with the goal of providing examples of metric tensors with a large number of Killing vectors. It also introduces a special family of Lie groups which I've called multiparameter groups. These are Lie groups whose domain is an open set in IR^{n}. The infinitesimal generators for these groups are used to construct the left and right invariant vectorfields on the group, as well as the Killing vectors for some special invariant metric tensors on the groups.

Foundations of Wave Phenomena: Complete Version
Charles G. Torre
This is the complete version of Foundations of Wave Phenomena. Version 8.3.
Please click here to explore the components of this work. 
A Guide to the Identification of Tailed Myxobolidae of the World: Dicauda, Hennegoides, Henneguya, Laterocaudata, Neohenneguya, Phlogospora, Tetrauromena, Trigonosporus and Unicauda
Eric J. Wagner
The phylum Myxozoa contains over 2100 species of parasites that principally infect fish, although some species infect amphibian and reptilian hosts (Kudo 1920; Lom and Dykova 2006; Yokoyama et al. 2012). Myxozoans are multicellular, comprised of 1 to 7 spore shell valves, 12 infective germ sporoplasms, and 2 to 7 polar capsules (Lom and Dyková 1992). The polar capsules contain an extrudible filament used for attachment to a host, similar to the stinging cells of Cnidaria. After attachment, 1 to 2 amoeboid sporoplasms infect the target tissue and begin development. See Lom and Dyková (1992) for details on development of the trophozooite, plasmodia, and mature spores. Several myxozoan parasites studied to date have a life cycle with two hosts: fish and aquatic oligochaete or polychaete worms (Lom and Dyková 2006). The myxospore stage infects the worm host when ingested, which produces the actinospore stage that infects the fish host. Yokoyama et al. (2012) listed 33 myxozoan species for which the corresponding actinospore stage has been identified. These species include Myxobolus cerebralis (Wolf and Markiw 1984), the first species deduced to have a complex twohost life cycle. Other species within Myxobolidae include M. cotti (ElMatbouli and Hoffman 1989), M. carassii (ElMatbouli and Hoffmann 1993), M. arcticus (Kent et al. 1993), M. drjagini (ElMansy and Molnar 1997a), M. portucalensis (ElMansy et al. 1998), M. hungaricus (ElMansy and Molnar 1997b), M. psuedodispar (Székely et al. 2001), M. bramae (Eszterbauer et al. 2000), M. macrocapsularis (Székely et al. 2002), and M. parviformis (Kallert et al. 2005). Among Henneguya species, only H. exilis, H. ictaluri, H. mississippiensis and H. neusslini have had the actinospore stage discovered (aurantiactinomyxon or triactinomyxon; Yokoyama et al. 2012; Rosser et al. 2015). So, many species have not had their complete life cycle determined yet. Likely, future taxonomic revisions of Myxozoa will consider the morphology of the actinospore stage, which varies among the known life cycles (e.g., hexactinomyxon, raabeia, triactinomyxon; Lom and Dyková 2006). See Yokoyama et al. (2012) for a key to these actinospore types.
The organisms in this guide are in the family Myxobilidae within suborder Platysporina, order Bivalvulida, class Myxosporea, phylum Myxozoa. The family Myxobolidae Thélohan 1892 is characterized by spores flattened parallel to the straight sutural line and two polar capsules (which may be unequal in length). The genera of Myxobolidae that lack tails, i.e., Myxobolus, Spirosutoria, Neothelohanellus, Thelohanellus, Neothelohanellus, are not covered in this guide. This summary covers the genera that have appendages that look like ‘tails’, i.e., Henneguya, Hennegoides, Neohenneguya, Unicauda, Dicauda, Laterocaudata, Phlogospora, and Tetrauronema, and Trigonosporus. The tailed spores of Myxobilatus (family Parvicapsulidae, suborder Variisporina), which look similar to Henneguyaspores, but have striated shells and the suture line bisects the polar capsules, are also not included in this guide, other than in the family key. I have chosen to use the word ‘tail’ instead of ‘caudal appendage’ or ‘caudal projection’ to make the guide more user friendly and to use less space in the text boxes. For similar reasons I have chosen to use the word ‘cyst’ instead of ‘trophozooite’.

An Introduction to Editing Manuscripts for Medievalists
János M. Bak
A practical guide on the editing of medievalmainly Latinmanuscripts for editors and users of MSS. It discusses basic issues of textual and manuscript transmission and contains guidelines for the description and textual analysis of manuscripts, the emendation and editing of texts, and a chapter on questions of translation and bilingual editions.
An updated and revised version is available in paperback from Gorgias Press: https://www.gorgiaspress.com/introductiontoworkingwithmanuscriptsformedievalists
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