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Principal Component Analysis: Mathematical procedure that transforms a number of possibly correlated variables into a smaller number of uncorrelated variables called principal components.
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Ohm's Law

JoVE 10116

Source: Andrew Duffy, PhD, Department of Physics, Boston University, Boston, MA

This experiment investigates Ohm's law, which relates current, voltage, and resistance.

One goal of the experiment is to become familiar with circuit diagrams and the terminology involved in basic circuits, such as resistor, resistance, current, voltage, and power supply. By the end of the experiment, familiarity is gained with how to wire up a circuit and how to measure both the current passing through a circuit component and the potential difference, or voltage, across it. In a circuit, a battery or power supply provides a voltage measured in volts (V) that makes the charge flow. Other elements in the circuit, such as light bulbs or resistors (which are often just long narrow wires wound into coils) limit the rate at which the charge flows. The rate of flow of the charge is known as current measured in amperes (A), or amps for short, and the degree to which resistors and light bulb filaments limit the flow is known as their resistance measured in ohms (Ω). This experiment involves an exploration of Ohm's law, which relates voltage, current, and resistance. This experiment also explores the difference between a basic circuit component called a resistor, a


 Physics II

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Production and Administration of Therapeutic Mesenchymal Stem/Stromal Cell (MSC) Spheroids Primed in 3-D Cultures Under Xeno-free Conditions

1Department of Biology, University of Mary Hardin-Baylor, 2Department of Pediatrics, University of Texas Medical Branch, 3Multi-Organ Support Technology Task Area, U.S. Army Institute of Surgical Research, 4Internal Medicine, Texas A&M University Health Science Center

JoVE 55126


 Developmental Biology

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Quantitation of Protein Expression and Co-localization Using Multiplexed Immuno-histochemical Staining and Multispectral Imaging

1Division of Urologic Surgery, Washington University in St. Louis School of Medicine, 2Department of Urology, University of Wisconsin School of Medicine and Public Health, 3Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, 4O’Brien Urology Research Center, University of Wisconsin School of Medicine and Public Health

JoVE 53837


 Biology

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A Lipid Extraction and Analysis Method for Characterizing Soil Microbes in Experiments with Many Samples

1Department of Agronomy and Great Lakes Bioenergy Research Center, University of Wisconsin - Madison, 2Department of Soil Science, University of Wisconsin - Madison, 3Department of Soil, Water, and Climate, University of Minnesota, 4Faculty of Science and Engineering, Curtin University

JoVE 55310


 Environment

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A Method to Estimate Cadaveric Femur Cortical Strains During Fracture Testing Using Digital Image Correlation

1Division of Engineering, Mayo Clinic, 2Department of Physiology and Biomedical Engineering, Mayo Clinic, 3Department of Orthopedic Surgery, Mayo Clinic, 4Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign

JoVE 54942


 Bioengineering

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A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting

1Department of Radiology, Memorial Sloan Kettering Cancer Center, 2KAUST Catalysis Center, King Abdullah University of Science and Technology, 3Department of Chemistry, Hunter College, and PhD Program in Chemistry, Graduate Center of City University of New York, 4Department of Radiology, Weill Cornell Medical College

JoVE 54694


 Bioengineering

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Generation of Scalable, Metallic High-Aspect Ratio Nanocomposites in a Biological Liquid Medium

1Biophysics Department, Centenary College of Louisiana, 2Department of Chemistry, Louisiana Tech University, 3Department of Integrative Physiology, University of North Texas Health Sciences Center, 4Biomedical Engineering, Louisiana Tech University, 5Institute for Micromanufacturing, Louisiana Tech University

JoVE 52901


 Bioengineering

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Conscious and Non-conscious Representations of Emotional Faces in Asperger's Syndrome

1Institute of Statistical Science, Academia Sinica, 2Max Planck Institute for Human Cognitive and Brain Sciences, 3Department of Psychology, Fo Guang University, 4Department of Electrical Engineering, Fu Jen Catholic University, 5State Research Institute of Physiology and Basic Medicine, 6Novosibirsk State University, 7Imaging Research Center, Taipei Medical University

JoVE 53962


 Behavior

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