Online courses directory (19947)
Este curso está destinado a estudiantes universitarios de la rama de las Tecnologías de la Información y las Comunicaciones que quieran conocer los mecanismos fundamentales de las comunicaciones por fibra óptica. También es adecuado para profesionales relacionados con las instalaciones de fibra óptica que deseen comprender aspectos fundamentales sobre la generación, propagación y detección de la señal óptica.
En él aprenderás los conceptos básicos relacionados con las comunicaciones ópticas. Tras comprender la importancia de las redes ópticas en la actualidad atendiendo a la evolución de la demanda y los servicios, se explicarán los fundamentos del guiado de la luz en la fibra óptica, así como las características de los modos propagados por fibras multimodo y monomodo. A continuación se estudiarán la atenuación y la dispersión, como efectos fundamentales de propagación en la fibra óptica, así como las limitaciones que éstos suponen en alcance y capacidad máxima. También se explicará la generación de señal óptica en LEDs y láseres, así como la detección y recuperación de la información transmitida por la fibra. Finalmente, el último capítulo permitirá al alumno realizar los cálculos necesarios para diseñar un sistema de comunicaciones ópticas, con la posibilidad de emplear técnicas multicanal WDM o SCM en estos sistemas.
This module, the fifth installment of the multi-part Poetry in America series, explores the Poetry of the Civil War and its Aftermath. We will:
- Encounter such poets as Herman Melville, Julia Ward Howe, Walt Whitman, Edwin Arlington Robinson, Paul Laurence Dunbar, James Weldon Johnson, Francis Ellen Watkins Harper, Emma Lazarus and W.E.B DuBois.
- Examine the language of patriotism, pride, justice, violence, loss, and memory inspired by the Nation’s greatest conflict.
- Travel to Boston’s Robert Gould Shaw and Massachusetts 54th Regiment Monument, and to Harvard’s Memorial Hall, two iconic sites of Civil War public memory.
Distinguished guests for this module include Harvard President Drew Faust, Pulitzer Prize-winning playwright and screenwriter Tony Kushner, Professor and Emmy Award-winning filmmaker Henry Louis Gates Jr., baritone Davone Tines, and Harvard Civil War scholar John Stauffer, among others.
Led by Harvard Professor Elisa New, Poetry in America surveys nearly 400 years of American poetry. Through video lectures, archival images and texts, expeditions to historic sites, interpretive seminars with large and small groups, interviews with poets and scholars, and conversations about poems with distinguished Americans, Poetry in America embarks on a journey through the literature of a nation. Distinguished guests, including President Bill Clinton, Elena Kagan, Henry Louis Gates, Eve Ensler, John McCain, Andrea Mitchell, Michael Pollan, Drew Faust, Tony Kushner, and Nas, among others, bring fresh perspectives to the study of American Poetry.
HarvardX pursues the science
As contemporary humans, we are a product of our evolutionary past. That past can be directly observed through the study of the human fossil record, the materials preserved for archaeological study, and the DNA of living and extinct human populations. This course will provide an overview of human evolutionary history from the present--contemporary human variation in a comparative context--through our last common ancestor with the living great apes, some 5-7 million years in the past. Emphasis will be placed on major evolutionary changes in the development of humans and the methodological approaches used by paleoanthropologists and related investigators to develop that knowledge.
The course will begin by asking basic questions about how evolution operates to shape biological variation and what patterns of variation look like in living humans and apes. We will then look at how the human lineage first began to differentiate from apes, the rise and fall of the Australopithecines, the origin and dispersal of the genus Homo, and eventually the radical evolutionary changes associated with the development of agricultural practices in the past 15,000 years. Throughout the course students will be exposed to the primary data, places and theories that shape our understanding of human evolution.
Ping pong ball launcher introduction. Build a ping pong ball launcher . Update and modify your ping pong ball launcher. Ping pong ball launcher introduction. Build a ping pong ball launcher . Update and modify your ping pong ball launcher.
Thermo Can. Thermo Can.
SAT prep: test 1 section3 part 1. SAT Prep: Test 1 Section 3 Part 2. SAT Prep: Test 1 Section 3 Part 3. SAT Prep: Test 1 Section 3 Part 4. SAT Prep: Test 1 Section 3 Part 5. SAT Prep: Test 1 Section 3 Part 6. SAT Prep: Test 1 Section 3 Part 7. SAT Prep: Test 1 Section 3 Part 8. SAT Prep: Test 1 Section 6 Part 1. SAT Prep: Test 1 Section 6 Part 2. SAT Prep: Test 1 Section 6 Part 3. SAT Prep: Test 1 Section 6 Part 4. SAT Prep: Test 1 Section 6 Part 5. SAT Prep: Test 1 Section 6 Part 6. SAT Prep: Test 1 Section 9 Part 1. SAT Prep: Test 1 Section 9 Part 2. SAT Prep: Test 1 Section 9 Part 3. SAT Prep: Test 1 Section 9 Part 4. SAT Prep: Test 1 Section 9 Part 5. SAT Prep: Test 2 Section 3 part 1. SAT Prep: Test 2 Section 3 Part 2. SAT Prep: Test 2 Section 3 Part 3. SAT Prep: Test 2 Section 3 Part 4. SAT Prep: Test 2 Section 3 Part 5. SAT Prep: Test 2 Section 3 Part 6. SAT Prep: Test 2 Section 6 Part 1. SAT Prep: Test 2 Section 6 Part 2. SAT Prep: Test 2 Section 6 Part 3. 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SAT Prep: Test 4 Section 4 Part 2. SAT Prep: Test 4 Section 4 Part 3. SAT Prep: Test 4 Section 4 Part 4. SAT Prep: Test 4 Section 8 Part 1. SAT Prep: Test 4 Section 8 Part 2. SAT Prep: Test 4 Section 8 Part 3. SAT Prep: Test 4 Section 8 Part 4. SAT Prep: Test 5 Section 3 Part 1. SAT Prep: Test 5 Section 3 Part 2. SAT Prep: Test 5 Section 3 Part 3. SAT Prep: Test 5 Section 3 Part 4. SAT Prep: Test 5 Section 3 Part 5. SAT Prep: Test 5 Section 3 Part 6. SAT Prep: Test 5 Section 7 Part 1. SAT Prep: Test 5 Section 7 Part 2. SAT Prep: Test 5 Section 7 Part 3. SAT Prep: Test 5 Section 7 Part 4. SAT Prep: Test 5 Section 7 Part 5. SAT Prep: Test 5 Section 7 Part 6. SAT Prep: Test 5 Section 9 Part 1. SAT Prep: Test 5 Section 9 Part 2. SAT Prep: Test 5 Section 9 Part 3. SAT Prep: Test 5 Section 9 Part 4. SAT Prep: Test 6 Section 3 Part 1. SAT Prep: Test 6 Section 3 Part 2. SAT Prep: Test 6 Section 3 Part 3. SAT Prep: Test 6 Section 3 Part 4. SAT Prep: Test 6 Section 3 Part 5. SAT Prep: Test 6 Section 7 Part 1. SAT Prep: Test 6 Section 7 Part 2. SAT Prep: Test 6 Section 7 Part 3. SAT Prep: Test 6 Section 7 Part 4. SAT Prep: Test 6 Section 7 Part 5. SAT Prep: Test 6 Section 7 Part 6. SAT Prep: Test 6 Section 9 Part 1. SAT Prep: Test 6 Section 9 Part 2. SAT Prep: Test 6 Section 9 Part 3. SAT Prep: Test 6 Section 9 Part 4. SAT Prep: Test 7 Section 2 Part 1. SAT Prep: Test 7 Section 2 Part 2. SAT Prep: Test 7 Section 2 Part 3. SAT Prep: Test 7 Section 2 Part 4. SAT Prep: Test 7 Section 5 Part 1. SAT Prep: Test 7 Section 5 Part 2. SAT Prep: Test 7 Section 5 Part 3. SAT Prep: Test 7 Section 5 Part 4. SAT Prep: Test 7 Section 5 Part 5. SAT Prep: Test 7 Section 8 Part 1. SAT Prep: Test 7 Section 8 Part 2. SAT Prep: Test 7 Section 8 Part 3. SAT Prep: Test 7 Section 8 Part 4. SAT Prep: Test 8 Section 2 Part 1. SAT Prep: Test 8 Section 2 Part 2. SAT Prep: Test 8 Section 2 Part 3. SAT Prep: Test 8 Section 2 Part 4. SAT Prep: Test 8 Section 5 Part 1. SAT Prep: Test 8 Section 5 Part 2. SAT Prep: Test 8 Section 5 Part 3. SAT Prep: Test 8 Section 5 Part 4. SAT Prep: Test 8 Section 8 Part 1. SAT Prep: Test 8 Section 8 Part 2. SAT Prep: Test 8 Section 8 Part 3. SAT prep: test 1 section3 part 1. SAT Prep: Test 1 Section 3 Part 2. SAT Prep: Test 1 Section 3 Part 3. SAT Prep: Test 1 Section 3 Part 4. SAT Prep: Test 1 Section 3 Part 5. SAT Prep: Test 1 Section 3 Part 6. SAT Prep: Test 1 Section 3 Part 7. SAT Prep: Test 1 Section 3 Part 8. SAT Prep: Test 1 Section 6 Part 1. SAT Prep: Test 1 Section 6 Part 2. SAT Prep: Test 1 Section 6 Part 3. SAT Prep: Test 1 Section 6 Part 4. SAT Prep: Test 1 Section 6 Part 5. SAT Prep: Test 1 Section 6 Part 6. SAT Prep: Test 1 Section 9 Part 1. SAT Prep: Test 1 Section 9 Part 2. SAT Prep: Test 1 Section 9 Part 3. SAT Prep: Test 1 Section 9 Part 4. SAT Prep: Test 1 Section 9 Part 5. SAT Prep: Test 2 Section 3 part 1. SAT Prep: Test 2 Section 3 Part 2. SAT Prep: Test 2 Section 3 Part 3. SAT Prep: Test 2 Section 3 Part 4. SAT Prep: Test 2 Section 3 Part 5. SAT Prep: Test 2 Section 3 Part 6. SAT Prep: Test 2 Section 6 Part 1. SAT Prep: Test 2 Section 6 Part 2. SAT Prep: Test 2 Section 6 Part 3. SAT Prep: Test 2 Section 6 Part 4. SAT Prep: Test 2 Section 6 Part 5. SAT Prep: Test 2 Section 6 Part 6. SAT Prep: Test 2 Section 9 Part 1. SAT Prep: Test 2 Section 9 Part 2. SAT Prep: Test 2 Section 9 Part 3. SAT Prep: Test 2 Section 9 Part 4. SAT Prep: Test 3 Section 2 Part 1. SAT Prep: Test 3 Section 2 Part 2. SAT Prep: Test 3 Section 2 Part 3. SAT Prep: Test 3 Section 2 Part 4. Test 3 Section 2 Part 5. SAT Prep: Test 3 Section 4 Part 1. SAT Prep: Test 3 Section 4 Part 2. SAT Prep: Test 3 Section 4 Part 3. SAT Prep: Test 3 Section 4 Part 4. SAT Prep: Test 3 Section 4 Part 5. SAT Prep: Test 3 Section 8 Part 1. SAT Prep: Test 3 Section 8 Part 2. SAT Prep: Test 3 Section 8 Part 3. SAT Prep: Test 3 Section 8 Part 4. SAT Prep: Test 4 Section 2 Part 1. SAT Prep: Test 4 Section 2 Part 2. SAT Prep: Test 4 Section 2 Part 3. SAT Prep: Test 4 Section 2 Part 4. SAT Prep: Test 4 Section 2 Part 5. SAT Prep: Test 4 Section 2 Part 6. SAT Prep: Test 4 Section 4 Part 1. SAT Prep: Test 4 Section 4 Part 2. SAT Prep: Test 4 Section 4 Part 3. SAT Prep: Test 4 Section 4 Part 4. SAT Prep: Test 4 Section 8 Part 1. SAT Prep: Test 4 Section 8 Part 2. SAT Prep: Test 4 Section 8 Part 3. SAT Prep: Test 4 Section 8 Part 4. SAT Prep: Test 5 Section 3 Part 1. SAT Prep: Test 5 Section 3 Part 2. SAT Prep: Test 5 Section 3 Part 3. SAT Prep: Test 5 Section 3 Part 4. SAT Prep: Test 5 Section 3 Part 5. SAT Prep: Test 5 Section 3 Part 6. SAT Prep: Test 5 Section 7 Part 1. SAT Prep: Test 5 Section 7 Part 2. SAT Prep: Test 5 Section 7 Part 3. SAT Prep: Test 5 Section 7 Part 4. SAT Prep: Test 5 Section 7 Part 5. SAT Prep: Test 5 Section 7 Part 6. SAT Prep: Test 5 Section 9 Part 1. SAT Prep: Test 5 Section 9 Part 2. SAT Prep: Test 5 Section 9 Part 3. SAT Prep: Test 5 Section 9 Part 4. SAT Prep: Test 6 Section 3 Part 1. SAT Prep: Test 6 Section 3 Part 2. SAT Prep: Test 6 Section 3 Part 3. SAT Prep: Test 6 Section 3 Part 4. SAT Prep: Test 6 Section 3 Part 5. SAT Prep: Test 6 Section 7 Part 1. SAT Prep: Test 6 Section 7 Part 2. SAT Prep: Test 6 Section 7 Part 3. SAT Prep: Test 6 Section 7 Part 4. SAT Prep: Test 6 Section 7 Part 5. SAT Prep: Test 6 Section 7 Part 6. SAT Prep: Test 6 Section 9 Part 1. SAT Prep: Test 6 Section 9 Part 2. SAT Prep: Test 6 Section 9 Part 3. SAT Prep: Test 6 Section 9 Part 4. SAT Prep: Test 7 Section 2 Part 1. SAT Prep: Test 7 Section 2 Part 2. SAT Prep: Test 7 Section 2 Part 3. SAT Prep: Test 7 Section 2 Part 4. SAT Prep: Test 7 Section 5 Part 1. SAT Prep: Test 7 Section 5 Part 2. SAT Prep: Test 7 Section 5 Part 3. SAT Prep: Test 7 Section 5 Part 4. SAT Prep: Test 7 Section 5 Part 5. SAT Prep: Test 7 Section 8 Part 1. SAT Prep: Test 7 Section 8 Part 2. SAT Prep: Test 7 Section 8 Part 3. SAT Prep: Test 7 Section 8 Part 4. SAT Prep: Test 8 Section 2 Part 1. SAT Prep: Test 8 Section 2 Part 2. SAT Prep: Test 8 Section 2 Part 3. SAT Prep: Test 8 Section 2 Part 4. SAT Prep: Test 8 Section 5 Part 1. SAT Prep: Test 8 Section 5 Part 2. SAT Prep: Test 8 Section 5 Part 3. SAT Prep: Test 8 Section 5 Part 4. SAT Prep: Test 8 Section 8 Part 1. SAT Prep: Test 8 Section 8 Part 2. SAT Prep: Test 8 Section 8 Part 3.
Want to manage software development, but unsure where to begin? This computer science course will teach you the models, methods and practices of software development to make the process manageable and result in high-quality and efficient software products.
This course is an introduction to software lifecycle management using the approved principles and best practices developed by IT leaders and verified by large-scale systems operation. Starting with the basics of lifecycles, the course will open your mind and challenge you. You will learn how to make justified decisions on the industry-level software solutions, and instantly apply the principles and methods learned.
Taught by an instructor with over a decade of managing software development at a diverse multinational corporation, ITERA International Oil and Gas, this computer science course will equip managers with the skills they need to understand the principles and use the state-of-the-art methods and practices for lifecycle management. Additionally, learners (and managers) who require a systematic understanding of what happens inside the software development in terms of roles, activities, resources and deliverables can use this course to eliminate skill gaps.
No previous knowledge needed. Join us as you start your software engineering journey.
Like no other event in recent history, the 2014 Ebola outbreak has made clear the fragility of existing health systems. While responding to the current epidemic is critical, we also have an opportunity to learn lessons to prevent the next global health catastrophe, forge partnerships across borders and disciplines, and demonstrate our commitment to value all human lives.
This four-week course provides the context in which to understand the Ebola outbreak -- why now, and why did so many people suffer and die? The course lays out the global governance structure -- what was the global response supposed to look like, and where did it fail?
The course will feature practitioners, experts, and scholars who will focus on cultivating a better understanding of the Ebola epidemic and implications for future health systems to ensure that the world is more effective in preventing the next pandemic.
This course will allow you to better understand the world around you through utilising the anthropological lens. You will learn about the way in which anthropology as a discipline can shed new perspectives on current world issues, from indigeneity to migration and material culture.
We want to challenge you to reflect on your own perspective when thinking about these issues, how you see the world and how we all engage with difference and sameness on a daily basis.
We will interview notable anthropologists and follow some around the world and into their field to explore the issues, the people they work with and their place in the world.
Este curso introduce las evaluaciones de impacto aleatorizadas (o experimentales) como una herramienta para probar y mejorar la eficacia de programas y políticas sociales.
El curso te entregará los conceptos fundamentales para entender en qué consisten las evaluaciones de impacto aleatorizadas, por qué son importantes, cómo se diseñan e implementan, y cómo usar sus resultados.
Combinando clases teóricas y casos de estudio basados en evaluaciones reales, el curso presta atención a aspectos como las virtudes de la metodología experimental, los distintos diseños de aleatorización posibles y qué situaciones pueden poner en riesgo la validez interna de un experimento.
Asimismo, enfatiza otros temas que son relevantes para cualquier tipo de evaluación de programas, tales como medir adecuadamente los resultados de interés, asegurar la calidad de los datos y usar los resultados en el diseño de programas y políticas nuevas.
El curso de Evaluación de Impacto de Programas Sociales está diseñado para múltiples tipos de audiencias: funcionarios de instituciones gubernamentales, ONGs, fundaciones y otras organizaciones que diseñan, implementan o financian programas sociales; así como investigadores, académicos y estudiantes en busca de nuevas herramientas de análisis.
60 minutes: Khan Academy's "world-changing" plan for schools. 60 minutes: Google's Eric Schmidt on Khan Academy. 60 minutes: School of the future. 60 minutes: Khan Academy in the classroom. 60 minutes: Khan Academy's "world-changing" plan for schools. 60 minutes: Google's Eric Schmidt on Khan Academy. 60 minutes: School of the future. 60 minutes: Khan Academy in the classroom.
Elizabeth Slavitt. Marcos Ojeda. Minli Virdone. Jessica Yuen. Elizabeth Slavitt. Marcos Ojeda. Minli Virdone. Jessica Yuen.
Salman Khan talk at TED 2011 (from ted.com). 60 minutes: The future of education?. Salman Khan on Charlie Rose 2013. Bill Gates talks about the Khan Academy at Aspen Ideas Festival 2010. Salman Khan talk at TED 2011 (from ted.com). 60 minutes: The future of education?. Salman Khan on Charlie Rose 2013. Bill Gates talks about the Khan Academy at Aspen Ideas Festival 2010.
Globally, higher education institutions are grappling with the effects of an increasingly digital world. This course provides an overview of how digitization impacts the economics, administration, academics, and research practices of universities and colleges. Higher education administrators, faculty, staff, and students will benefit from this course by exploring the emerging structure and role of higher education.
Participants will engage with key trends that are shaping higher education and learn how these trends are amplified by the growing digital structure of society. In order to prepare their institution to become digital, learners will go through processes of evaluating trends, determining impact on education practices, and finally produce a strategic department or organizational planning document.
不论医生、护士，还是其他医务人员，我们共同的目的就是维护人们的健康。要做到这一点，首先我们必须了解人们的健康状况如何？是否存在健康问题？《健康评估》所要介绍的就是作为一个护士应如何对护理对象进行健康状况的评估，进而明确所存在的健康问题和护理需求。
《健 康评估》不仅包括理论知识的学习，更重要的是实践技能的训练。通过10周的学习，你将能够学习到如何运用交谈技巧全面系统地收集护理对象的健康史；运用 视、触、叩、听、嗅等身体评估方法进行全面系统的身体评估；成年人身体评估的正常表现、常见异常体征及其临床意义；如何对所收集的资料进行分析，以明确可 能存在的健康问题；如何进行护理病历的书写等。
本课程的学习共分为8个单元，每个单元需要在观看视频以及阅读相关资料的基础上，完成单元测试、单元作业、参与论坛等。8个单元学习结束后，需要完成期末测试。
其中部分单元作业需要学员上传自己进行资料收集的实际操作视频，如健康史的采集、间接叩诊、头颈部评估等。
本课程将有助于提升你对护理专业的深入理解以及进行健康评估的能力和评判性思维能力，为使自己成为一名优秀的护理人员打下良好的基础。
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How do computers work? What do computer scientists do? What does it take to make a computer or a computer program work? We answer these questions and more with MyCS: Computer Science for Beginners.
We believe that anyone can succeed in and enjoy computer science. This course is an early introduction to CS, designed for anyone who's completely new to the field. It explores a combination of the basic principles of how computers work and how we can use them to solve interesting problems and create amazing things. Lessons alternate between general exercises and assignments in Scratch, which offer a chance to both practice some basic concepts of computer programming and explore the many cool, creative, and useful applications of CS.
You don't need any CS or programming background to do this course - just a bit of basic math and a lot of creative thinking. The course is intended especially for middle school students and their teachers, but is good for learners of all ages.
This material is based upon work supported by the National Science Foundation under Grant No. 1240939. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation (NSF).
This course will walk you through a patterns-based approach to building real-world cloud solutions. The patterns apply to the development process as well as to architecture and coding practices.
The concepts are illustrated with concrete examples, and each module includes links to other resources that provide more in-depth information. The examples and the links to additional resources are for Microsoft frameworks and services, but the principles illustrated apply to other web development frameworks and cloud environments as well.
This is part two of a three-course series. New patterns introduced in part 2 include single-sign on and data storage options.
SO... WHAT DO YOU WANT TO LEARN?
Do you have any burning questions about developing apps for the cloud? Once you enroll, please send your question to DEV202x@microsoft.com. Not only will this help us fine-tune the course content but Tom Dykstra and Rick Anderson will post answer to the most asked questions when the course launches.
Khan Academy at Marlborough School. Khan Academy at Oakland Unity High School. Khan Academy at Summit Prep. Khan Academy at Eastside College Prep. Khan Academy in Los Altos School District. Khan Academy at KIPP. Khan Academy at Marlborough School. Khan Academy at Oakland Unity High School. Khan Academy at Summit Prep. Khan Academy at Eastside College Prep. Khan Academy in Los Altos School District. Khan Academy at KIPP.
MCAT Video Competition. MCAT Video Competition Details. How to make a video. MCAT Video Competition. MCAT Video Competition Details. How to make a video.
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