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Data Collection: Systematic gathering of data for a particular purpose from various sources, including questionnaires, interviews, observation, existing records, and electronic devices. The process is usually preliminary to statistical analysis of the data.

Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation

1Neuropsychiatric Institute, University of California, Los Angeles, 2Laboratory of Neuroimaging Technology, University of California, Los Angeles, 3Yale School of Medicine, 4Korean Basic Science Institute

JoVE 3298


 Behavior

Simultaneous Scalp Electroencephalography (EEG), Electromyography (EMG), and Whole-body Segmental Inertial Recording for Multi-modal Neural Decoding

1Functional and Applied Biomechanics Group, National Institutes of Health, 2Laboratory for Non-invasive Brain-Machine Interface Systems, Department of Electrical and Computer Engineering, University of Houston, 3Department of Health and Human Performance, University of Houston, 4Center for Neuromotor & Biomechanics Research, University of Houston, 5Department of Biomedical Engineering, University of Houston

JoVE 50602


 Behavior

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography

1Center for Free Electron Laser Science, DESY, 2Department of Physics, University of Hamburg, 3Institute for Biochemistry and Molecular Biology, Laboratory for Structural Biology of Infection and Inflammation, University of Hamburg, 4The Hamburg Center for Ultrafast Imaging, University of Hamburg, 5Integrated Biology Infrastructure Life-Science Facility at the European XFEL (XBI), 6European Molecular Biology Laboratory, EMBL c/o DESY, 7Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry

JoVE 57133


 Chemistry

The Hawaii Protocol for Scientific Monitoring of Coffee Berry Borer: a Model for Coffee Agroecosystems Worldwide

1Oak Ridge Institute for Science and Education, 2Daniel K. Inouye US Pacific Basin Agricultural Research Center, United States Department of Agriculture-Agricultural Research Service, 3College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa, 4Independent Consultant on CBB Management

JoVE 57204


 Environment

An Affordable HIV-1 Drug Resistance Monitoring Method for Resource Limited Settings

1Africa Centre for Health and Population Studies, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa, 2Unit D11, Jembi Health Systems, 3Academic Medical Center, Department of Global Health, Amsterdam Institute for Global Health and Development (AIGHD), University of Amsterdam, 4Division of Infectious Diseases and Geographic Medicine, Centre for AIDS Research, Stanford Medical School

JoVE 51242


 Medicine

A Familiarization Protocol Facilitates the Participation of Children with ASD in Electrophysiological Research

1Department of Communication Sciences and Disorders, Southern Connecticut State University, 2Haskins Laboratories, 3Department of Psychology, Southern Connecticut State University, 4Department of Social Work, Southern Connecticut State University, 5Department of Psychology, University of Connecticut

JoVE 55941


 Neuroscience

Experimental Approach for Determining Semiconductor/liquid Junction Energetics by Operando Ambient-Pressure X-ray Photoelectron Spectroscopy

1Division of Chemistry and Chemical Engineering, California Institute of Technology, 2Joint Center for Artificial Photosynthesis, California Institute of Technology, 3Advanced Light Source, Lawrence Berkeley National Laboratory, 4Beckman Institute, California Institute of Technology

Video Coming Soon

JoVE 54129


 JoVE In-Press

Use of a Filter Cartridge for Filtration of Water Samples and Extraction of Environmental DNA

1Department of Ecology and Environmental Sciences, Natural History Museum and Institute, Chiba, 2Graduate School of Human Development and Environment, Kobe University, 3Faculty of Science and Technology, Ryukoku University, 4Okinawa Churashima Research Center, 5Graduate School of Simulation Studies, University of Hyogo

JoVE 54741


 Environment

Key Elements of Photo Attraction Bioassay for Insect Studies or Monitoring Programs

1Arthropod-Borne Animal Diseases Research Unit, Center for Grain and Animal Health Research, Agricultural Research Service, United States Department of Agriculture, 2Center for Medical, Agricultural, and Veterinary Entomology, Agricultural Research Service, United States Department of Agriculture, 3Bayer

Video Coming Soon

JoVE 57445


 JoVE In-Press

The Replica Set Method: A High-throughput Approach to Quantitatively Measure Caenorhabditis elegans Lifespan

1Department of Biomedical Genetics, University of Rochester Medical Center, 2Department of Biostatistics and Computational Biology, University of Rochester Medical Center, 3Non-Clinical Statistics, Bristol-Myers Squibb, 4Department of Microbiology and Immunology, University of Rochester Medical Center

Video Coming Soon

JoVE 57819


 JoVE In-Press

Assessing the Multiple Dimensions of Engagement to Characterize Learning: A Neurophysiological Perspective

1Department of Didactics, Université du Québec à Montréal, 2Department of IT and Tech3Lab, HEC Montreal, 3Department of Marketing and Tech3Lab, HEC Montreal, 4Department of Specialized Education, Université du Québec à Montréal

JoVE 52627


 Behavior

Freezing-Point Depression to Determine an Unknown Compound

JoVE 10137

Source: Laboratory of Lynne O' Connell — Boston College

When a solid compound is dissolved in a solvent, the freezing point of the resulting solution is lower than that of the pure solvent. This phenomenon is known as freezing-point depression, and the change in temperature is directly related to the molecular weight of the solute. This experiment is designed to find the identity of an unknown compound by using the phenomenon of freezing-point depression to determine its molecular weight. The compound will be dissolved in cyclohexane, and the freezing point of this solution, as well as that of pure cyclohexane, will be measured. The difference between these two temperatures allows for the calculation of the molecular weight of the unknown substance.


 General Chemistry

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

1Mineral Physics Institute, Department of Geoscience, Stony Brook University, 2Geological Engineering, Department of Civil and Environmental Engineering, University of Wisconsin-Madison, 3Rock and Ice Physics Laboratory, Department of Earth Sciences, University College London, 4Department of Chemistry, Stony Brook University

JoVE 57555


 Environment

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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