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1. BASIC INFO =========================================================
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Accelerations, speeds and instantaneous centers of rotation of a baby
dummy head (6 weeks equivalent) determined in order to estimate the
potential harmfulness of shaking an infant.
Experimental data from 23 subjects.
Obtained using IMU's and an optical motion capturing system.

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= 1.1 DATASET TITLE ===================================================
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*** Kinematics of infants being shaken -
Inflicted head Injury by Shaking Trauma ***

SOURCE DATA OF JOURNAL ARTICLE:
Inflicted Head Injury by Shaking Trauma in Infants:
the potential effect of spatiotemporal variation of the rotation center 


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= 1.3 CONTACT INFO ====================================================
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Principal investiator:	dr.ir. Arjo J. Loeve
E-mail address:		a.j.loeve@tudelft.nl
Phone number:		+31(0)15-2782977
Affiliation:		Delft University of Technology
			Faculty of Mechanical, Maritime
				& Materials Engineering (3mE)
			Department of BioMechanical Engineering



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2. MATERIALS & METHODS ================================================
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For used software, sensors, setups, materials, methods, subjects etc.,
please see journal article titled:

"Inflicted Head Injury by Shaking Trauma in Infants: the potential
effect of spatiotemporal variation of the rotation center"

Authors: Luuk A.H. Schiks, Jenny Dankelman, Arjo J. Loeve	



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3. DATA SPECIFIC INFORMATION ==========================================
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= 3.1 FILE NAMING CONVENTIONS, FILE FORMATS & FILE RELATIONS ==========
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== \dataSOURCE\				Folder (ZIP) with source data of
					the tests desribed in this
					application.
	
 + == calibration_yyyymmdd.csv		csv-files with measurement data
					obtained during calibration
					of the used motion tracking
					system. "yyyymmdd" indicates the
					spot where the date should be
					placed in that very same
					format. Data file obtained using
					the LabVIEW data acquisition 
					script (20190410-IHI-ST-DAQ.vi).

 + == SUBJ##.csv			csv-files with measurement data
					per subject. (## = 2-digit
					subject number.) See section
					below for explanation of used
					symbols, abbreviations & units.
					Data file obtained using the 
					LabVIEW data acquisition script
					(20190410-IHI-ST-DAQ.vi).

 + == SUBJ##.mat			Matlab mat-files with
					measurement data per subject.
					(## = 2-digit subject number.)
					See section
					below for explanation of used
					symbols, abbreviations & units.
					Data file obtained using 
					Mathworks MATLAB version R2020B.

== 20220321-IHI-ST-Data_Analysis.m	Matlab script
					Data analysis using data files
					of subjects (from SUBJ##.mat)
					to calculate the locations of
					the Instantaneous Center Of
					Rotation during the shaking
					cycles and to compare the
					different model categories for
					their performance in replicating
					shaking kinematics. Script 
					written in Mathworks MATLAB 
					version R2020B.

== InterX.m				Matlab script 
					Custom function for calculating
					the intersection point between
					two lines defined by a numeric 
					set of data (i.e. x,y 
					coordinates). Script written in 
					Mathworks MATLAB version R2020B.

== 20190410-IHI-ST-DAQ.vi		LabVIEW script used to obtain 
					data with the Data Acquisition 
					system NI USB-6211, National 
					Instruments, Austin, Texas, 
					U.S.A. LabVIEW version 2018.



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= 3.2 DEFINITIONS AND UNITS OF VARIABLES AND HEADER ABBREVIATIONS =====
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=== 3.2.1 SUBJ##.csv, SUBJ##.mat & calibration_yyyymmdd.csv files: ====

SYMBOL/ABBREVIATION	EXPLANATION				UNITS

Calibration file date	Date on which calibration for this	yyyymmdd
			dataset or calibration file was done.
			yyyy	= 4-digit year
			mm 	= 2-digit month
			dd 	= 2-digit day
			For calibration_yyyymmdd.csv files
			this date indicates when the calibra-
			tion was done.
			For SUBJ##.mat & .csv files
			the date indicates which of the
			calibration files applied to that data.
			In the files the date format used is
			also yyyymmdd, even though the comment
			about the calibration date erroneously
			says yyymmdd (with only triple y).

Fs			Sample frequency used to obtain data 	Hz
			with the Data Acquisition system 
			NI USB-6211, National Instruments, 
			Austin, Texas, U.S.A. 

gy			Measured gyroscope output voltage. 	V
			Please note that this data was not 
			used in the analysis because the
			cut-off frequency of the sensor was 
			set too low.

tx, ty, tz		Measured torso accelerometer output 	V
			voltage, in respectively x-, y- and 
			z-direction.

cx, cy, cz		Measured Center of Gravity 		V
			accelerometer output voltage, in 
			respectively x-, y- and z-direction.

vx, vy, vz		Measured Vertex accelerometer output 	V
			voltage, in respectively x-, y- and 
			z-direction.

trig			Measured output voltage of the trigger 	V
			signal of the Motion Capture System.



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=== 3.2.2 All .m files ================================================

Please see comments in .m files for explanation of symbols, variables
names, abbreviations and units.


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4. SHARING AND ACCESS INFORMATION =====================================
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= 4.1 ACCESS INFORMATION ==============================================
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This dataset can be accessed via https://data.4TU.nl/ using:
DOI 10.4121/19388672


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= 4.1 LICENCE INFORMATION =============================================
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*** TYPE ***

CC BY-NC-ND 4.0

*** Legal code ***

https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode


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*** end of file ***