cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.34808/71qf-pr48
title: Phoenixin-14 effect on viability and THBS2 and CDH1 expression in 12Z endometriosis cell line

description: Phoenixin-14 is a neuropeptide produced by the paraventricular nuclei of the anterior hypothalamus that regulates reproductive system functions. Its level in patients with endometriosis is reduced and may be the cause of dysregulated HPG-axis. Our study tested endometriosis-specific concentrations of PNX-14 on endometrial epithelial cell line 12Z in vitro. We found that PNX downregulates THBS2 expression, the protein involved in the epithelial-to-mesenchymal transition, with no changes in CDH1 expression. PNX-14 at the level observed in women with endometriosis first decreases and, next, increases the viability of endometrial epithelial cells. There is a link between endometriosis-specific PNX-14 concentration and extracellular matrix proteins expression.
DOI: 10.34808/8087-b328
title: X-Ray photoemission spectroscopy measurements of the Nb-V-Sr-O ceramics

description: Niobium doped strontium vanadate based perovskite SrV1-xNbxO3-δ materials were prepared via conventional solid state reaction (SSR) method. For comparison, different samples with a various amount of niobium dopant in the structure were synthesized; x = 0; 0,2; 0,5; 0,8 and 1. Samples were sintered by two-steps: first under a pure hydrogen (purity &gt;99.999%) atmosphere at 600 °C for 10 h and at 800 °C for 10 h; and the second stage was at 1200 °C for 10 h in pure H2 atmosphere. The composition and valence states of elements in Nb-V-Sr-O ceramics were measurements. For investigatons, the XPS method were used. Analysis exhibit a mixed valence state of transition metals. Additionaly composition was calculated. It was in a line with stoichiometry of starting precursors in a solid state reaction.
DOI: 10.34808/c612-rc71
title: ECG measurement in the bathtub - drl on one side of the bathtub, the other side of the bathtub is grounded and the system ground is grounded- men

description: The measurement data shows the measurement of the ECG signal in water in the bathtub. The data includes the measurement time, the reference ECG signal from the chest, and the ECG signal measured by electrodes placed in the bathtub without contact with the human body. Using the presented data, it is possible to estimate the optimal arrangement of measuring electrodes, e.g. in the design of a measuring mat for a bathtub, depending on the expected nature and quality of the recorded data. The data shows a record of the heart's electrical activity at a specific electrode placement in or out of the bathtub. The data was recorded using the Analog Discovery 2 system and the WaveForm software.
Bath parameters:
tap water - conductivity before the inlet approx. 640us / cm
water temperature - 36 ° C
capacitance between the electrodes and the bath water - about 1-1.4 nF
capacity between the electrodes and the water with the person inside - about 1.4 - 2nF
water conductivity after bathing - about 660 us / cm
water temperature after bathing - 34 ° C
Measurement scenarios:  drl on one side of the bathtub, the other side of the bathtub is grounded and the system ground is grounded
Person: men
DOI: 10.34808/0774-fe63
title: XPS study of the TiO2-WO2 composites

description: Valence state of W and Ti was measured in a TiO2-WO3 composites with a various composition.Powder samples of pure titanium dioxide, tungsten oxide and mix of 50% titanium oxide and 50% od tungsten oxide were measured.  Oxides were annealed at the temperature in the range of 300 Celsius degree up to 900 deg. Measurements were performed by XPS UHV Omicron Nanotechnology system. Two regions, Ti2p and W4f were measured. On the basis of the high resolution spectra, details chemical composition was calculated.
DOI: 10.34808/kfed-yf32
title: Dewetting of silver films detected by XPS method

description: Dewetting of silver thin films was detected by XPS method. Thin metallic films were deposited by magnetron sputtering method. Formation of nanostructures , as a result of thermal annealing, was confirmed by SEM microscope. For comparision three samples were measured. Bulg gold, as-deposited silver film with thickness of 3 nm and nanostructures.
DOI: 10.34808/xmr4-a085
title: XPS analysis of TBBO glass

description: Glasses and glass-ceramics with nominal composition 73 TeO2– 4BaO– 3Bi2O3–18SrF2-2RE2O3 (where RE = Eu, Dy) have been synthesized by conventional melt-quenching technique and subsequent heat treatment at 370 °C for 24 h in air atmosphere. Various Eu3+ to Dy3+ molar ratio have been applied to investigate luminescence properties in both glass and glass-ceramic matrices. Especially, white light emission through simultaneous excitation of Eu3+ and Dy3+ has been studied in detail. Influence of crystalline SrF2 phase on luminescence kinetics has been determined by luminescence decay time measurements. Presence of crystalline SrF2 phase has been confirmed by X-ray diffraction technique XRD and transmission electron microscopy TEM. X-ray photoelectron spectroscopy XPS. XPS measurements were performed by OmicronNanotechnology UHV system. Data analysis was performed with the CASA XPS software package using a Shirley background subtraction and least-square Gaussian-Lorentzian – GL(30) curve fitting algorithm.
DOI: 10.34808/y6nk-fq15
title: Description of parameters of symmetrical prolate ellipsoid magnetic signature.

description: The Earth magnetic field (Fig.1): BE – total magnetic flux density, BEx – x component of the Earth magnetic flux density, BEy = 0  y component of the Earth magnetic flux density, BEz – z component of the Earth magnetic flux density, I – inclination of the Earth magnetic field.
The symmetrical prolate ellipsoid (Fig.2): L – length of ellipsoid, a – radius of ellipsoid, e – unidimensional coefficient, q - vertical angle, j - horizontal angle.
For each scenarios there are following files:
Ind_Bx_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]               Bx – x component of the ellipsoid magnetic flux density [nT]
Ind_By_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]              By – x component of the ellipsoid magnetic flux density [nT]
Ind_Bz_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]              Bz – x component of the ellipsoid magnetic flux density [nT]
Ind_xy_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]               x+jy – point coordinates [m] j = -10.5
were:
BE [mT], I [deg], z [m], q [deg], j [deg], mr – relative magnetic permeability
Ind – induced magnetization of ellipsoid
For the following parameters: Be = 50 mT, I = 70 deg, z = 10 m, q = 90 deg, j = 45 deg, a =4 m, e = 5, mr = 100
The names files are:
Ind_Bx_50_70_10_90_45_4_5_100        Bx – x component of the ellipsoid magnetic flux density [nT]
Ind_By_50_70_10_90_45_4_5_100        By – x component of the ellipsoid magnetic flux density [nT]
Ind_Bz_50_70_10_90_45_4_5_100        Bz – x component of the ellipsoid magnetic flux density [nT]
Ind_xy_50_70_10_90_45_4_5_100        xy – point coordinates [m]
For the following parameters: Be = 50 mT, I = 70 deg, z = 10 m, q = 90 deg, j = -90 deg, a =4 m, e = 5, mr = 100
The names files are:
Ind_Bx_50_70_10_90_m90_4_5_100    Bx – x component of the ellipsoid magnetic flux density [nT]
Ind_By_50_70_10_90_m90_4_5_100    By – x component of the ellipsoid magnetic flux density [nT]
Ind_Bz_50_70_10_90_m90_4_5_100    Bz – x component of the ellipsoid magnetic flux density [nT]
Ind_xy_50_70_10_90_m90_4_5_100    xy – point coordinates [m]
DOI: 10.34808/6g78-c298
title: ECG measurement in the bathtub - drl on one side of the bath, the mass of the system on the other- men

description: The measurement data shows the measurement of the ECG signal in water in the bathtub. The data includes the measurement time, the reference ECG signal from the chest, and the ECG signal measured by electrodes placed in the bathtub without contact with the human body. Using the presented data, it is possible to estimate the optimal arrangement of measuring electrodes, e.g. in the design of a measuring mat for a bathtub, depending on the expected nature and quality of the recorded data. The data shows a record of the heart's electrical activity at a specific electrode placement in or out of the bathtub. The data was recorded using the Analog Discovery 2 system and the WaveForm software.
Bath parameters:
tap water - conductivity before the inlet approx. 640us / cm
water temperature - 36 ° C
capacitance between the electrodes and the bath water - about 1-1.4 nF
capacity between the electrodes and the water with the person inside - about 1.4 - 2nF
water conductivity after bathing - about 660 us / cm
water temperature after bathing - 34 ° C
Measurement scenarios:  drl on one side of the bath, the mass of the system on the other
Person: men
DOI: 10.34808/dx3f-0a72
title: Voltage fluctuations on the main switchgear of the industrial power system supplying the rolling mill motors_part_2

description: The dataset presents the voltage waveforms on the bus bars of the main switchgear of the industrial power network for the supply of rolling mills. The data was recorded during an experiment whose purpose was to determine a level of short-term and long-term flicker caused by voltage fluctuations. In the virtual application of flickermeter, a hardware (acquisition of measuring data) and a software (computer data processing and graphical interface ) part can be distinguished. The attached dataset contains raw data at the output of the hardware part of the flickermeter.
The measurements were carried out in one of the Polish steel mills, in the GST- 6 switching station, on medium voltage (6 kV) switchgear rails in measurement field 2a using voltage transformers. The voltage value on the secondary side of the transformers was 100/root(3) V (a phase voltage). Field 3a of the switchboard supplies the rolling mill motor, whose operation causes voltage fluctuations. The scheme of the switchgear with the measuring point marked is shown in Figure 1. The measurement six five hours from 11:10 to 17:10. After the initial rolling period (until 11:30), there was a break in the rolling mill operation until about 14:20.
Measurements were performed using a measurement system that allows simultaneous measurement of three phase-to-phase or two-phase voltages. In the hardware part of the measuring system (Figure 2), the signal is first pre-conditioned. The analogue signal processing consists of matching the level of the measured signal to the inputs of the optoisolation amplifier, which ensures the separation of the high voltage signal. Then low-pass filtration through a set of anti-aliasing filters is carried out. The formation of the output digital signal from the analogue signal takes place in the A/D converter with a 16-bit resolution and a sampling rate of up to 20 kS/s.
The sampling frequency is equal to 20 000 Hz and is inserted in the first row of the attached files.
The file steel_mill_1 and steel_mill_2 contain the results of measurements that started at 11:10 and lasted about 60 and 6 minutes respectively. These files are placed in the dataset [Pałczyńska, B., & Tarasiuk, T. (2020). Voltage fluctuations on the main switchgear of the industrial power system supplying the rolling mill motors [Data set]. Gdańsk University of Technology. https://doi.org/10.34808/wv44-3z34]
The file steel_mill_3 and steel_mill_4 contain the results of measurements that started at 14:30 and lasted about 61 and 45 minutes respectively.  Figure 1. The scheme of the switchgear with the measuring point marked  Figure 2. The hardware part of the measurement system
DOI: 10.34808/g8k0-hq54
title: The corrosion studies of 3,4,5-trihydroxybenzoic acid as an effective corrosion inhibitor of low alloy steel

description: The dataset contains the electrochemical studies evaluating if gallic acid is a corrosion inhibitor for low alloy steel. Three measurements were carried out each case; corrosion potential (label ecorr), electrochemical impedance spectroscopy (label eis) and cyclic polarization (label cp). The measurements were carried out in sodium chloride, acidified with HCl to pH = 4. The measurements were carried out in carob molasses(label kar/karob), a green corrosion inhibitor containing gallic acid, for synthetic gallic acid (label gallicacid/GA), and two different compounds present within carob molasses: pyrocatechin (label katechina) and amylose (label amyloza). The file names also contain the concentrations used. The measurements were carried out in a three electrode cell with Ag|AgCl as a reference electrode and Pt counter electrode, using Gamry Reference 600+ potentionstat. The studies were part of the bachelor thesis of Miss Anita Rudol.
DOI: 10.34808/xz76-ez11
title: Images of LEGO bricks

description: The set contains images of LEGO bricks (from  multiple categories). The images were prepared for training neural network for recognition and labeling of LEGO bricks. The images contain one brick each. The images were taken from different sides by handheld camera hovering over the bricks lying on a white, non reflective surface.
The images were extracted from photos taken using Huawei p20 Pro camera (2160x3840 resolution, JPEG file format). The bricks were illuminated using two top-down facing 1600lm, 4000K LED lamps. The shutter speed and ISO were set to 1/100 and 50 respectively (to match the lamps frequency). Each file is limited to a single bounding box as detected using LegoSorter app (https://github.com/legosorter). The bounding boxes were created using YOLO trained neural network designated to detect (but not differentiate) LEGO bricks.
The bricks have random colors. The photos are organized using official LEGO part numbers, photos of each brick located in a folder named after the part number. The foldes in turn are organized into cathegories as found on rebrickable.com.
Sample images are presented below.
DOI: 10.34808/c829-av60
title: ECG measurement in the bathtub - drl in water, front and back measuring electrodes - men

description: The measurement data shows the measurement of the ECG signal in water in the bathtub. The data includes the measurement time, the reference ECG signal from the chest, and the ECG signal measured by electrodes placed in the bathtub without contact with the human body. Using the presented data, it is possible to estimate the optimal arrangement of measuring electrodes, e.g. in the design of a measuring mat for a bathtub, depending on the expected nature and quality of the recorded data. The data shows a record of the heart's electrical activity at a specific electrode placement in or out of the bathtub. The data was recorded using the Analog Discovery 2 system and the WaveForm software.
Bath parameters:
tap water - conductivity before the inlet approx. 640us / cm
water temperature - 36 ° C
capacitance between the electrodes and the bath water - about 1-1.4 nF
capacity between the electrodes and the water with the person inside - about 1.4 - 2nF
water conductivity after bathing - about 660 us / cm
water temperature after bathing - 34 ° C
Measurement scenarios:  drl in water, front and back measuring electrodes
Person: men
DOI: 10.34808/sd5z-gn65
title: ECG measurement in the bathtub - electrodes on the sides of the bathtub, sitting motionless - women

description: The measurement data shows the measurement of the ECG signal in water in the bathtub. The data includes the measurement time, the reference ECG signal from the chest, and the ECG signal measured by electrodes placed in the bathtub without contact with the human body. Using the presented data, it is possible to estimate the optimal arrangement of measuring electrodes, e.g. in the design of a measuring mat for a bathtub, depending on the expected nature and quality of the recorded data. The data shows a record of the heart's electrical activity at a specific electrode placement in or out of the bathtub. The data was recorded using the Analog Discovery 2 system and the WaveForm software.
Bath parameters:
tap water - conductivity before the inlet approx. 640us / cm
water temperature - 36 ° C
capacitance between the electrodes and the bath water - about 1-1.4 nF
capacity between the electrodes and the water with the person inside - about 1.4 - 2nF
water conductivity after bathing - about 660 us / cm
water temperature after bathing - 34 ° C
Measurement scenarios:  electrodes on the sides of the bathtub, sitting motionless
Person: women
DOI: 10.34808/x1dc-y691
title: ECG measurement in the bathtub - electrodes at the feet, bath simulation - women

description: The measurement data shows the measurement of the ECG signal in water in the bathtub. The data includes the measurement time, the reference ECG signal from the chest, and the ECG signal measured by electrodes placed in the bathtub without contact with the human body. Using the presented data, it is possible to estimate the optimal arrangement of measuring electrodes, e.g. in the design of a measuring mat for a bathtub, depending on the expected nature and quality of the recorded data. The data shows a record of the heart's electrical activity at a specific electrode placement in or out of the bathtub. The data was recorded using the Analog Discovery 2 system and the WaveForm software.
Bath parameters:
tap water - conductivity before the inlet approx. 640us / cm
water temperature - 36 ° C
capacitance between the electrodes and the bath water - about 1-1.4 nF
capacity between the electrodes and the water with the person inside - about 1.4 - 2nF
water conductivity after bathing - about 660 us / cm
water temperature after bathing - 34 ° C
Measurement scenarios:  electrodes at the feet, bath simulation
Person: women
DOI: 10.34808/xkw1-qt61
title: Types of tax revenues in developing countries

description: The dataset presents the division of tax revenue sources in selected countries, comparing data from 1986 and 1996. It is observed that developing countries are characterized by a significant dependence on indirect taxes, particularly on trade and consumption taxes. This contrasts with the situation in countries belonging to the OECD, where direct taxes, especially personal income tax, play a relatively greater role. In addition, in developed economies, it is necessary to emphasize the important role of social security revenues; in 1996 they accounted for 10% of GDP, which was almost ten times the value recorded in developing countries.
DOI: 10.34808/zak3-xc55
title: ECG measurement in the bathtub - electrodes on the sides of the bathtub at the knees, signal amplification x2 - women

description: The measurement data shows the measurement of the ECG signal in water in the bathtub. The data includes the measurement time, the reference ECG signal from the chest, and the ECG signal measured by electrodes placed in the bathtub without contact with the human body. Using the presented data, it is possible to estimate the optimal arrangement of measuring electrodes, e.g. in the design of a measuring mat for a bathtub, depending on the expected nature and quality of the recorded data. The data shows a record of the heart's electrical activity at a specific electrode placement in or out of the bathtub. The data was recorded using the Analog Discovery 2 system and the WaveForm software.
Bath parameters:
tap water - conductivity before the inlet approx. 640us / cm
water temperature - 36 ° C
capacitance between the electrodes and the bath water - about 1-1.4 nF
capacity between the electrodes and the water with the person inside - about 1.4 - 2nF
water conductivity after bathing - about 660 us / cm
water temperature after bathing - 34 ° C
Measurement scenarios:  electrodes on the sides of the bathtub at the knees, signal amplification x2
Person: women
DOI: 10.34808/578y-0t55
title: The database of indices computed from RR-intervals of length 512  of 46 healthy subjects at rest

description: This dataset contains the data that was a basis for the results discussed in the paper “Persistent homology as a new method of the assessment of heart rate variability” by Grzegorz Graff, Beata Graff, Paweł Pilarczyk, Grzegorz Jabłoński, Dariusz Gąsecki, Krzysztof Narkiewicz,  Plos One (2021), DOI: 10.1371/journal.pone.0253851.
The file is in the csv (comma-separated values) format that is easy to import by most types of spreadsheet software. All the patients are identified by the string “CON” (for control) followed by a 3-digit identifier (such as CON001, for example); note the non-contiguous numbering.
The file indices_CON.csv contains all the indices that were calculated for  the  purpose  of  their  potential  use  in  the  paper;  in  particular,  all  the standard hrv (heart rate variability) indices and all the topological indices introduced in the paper are contained in this dataset. These indices are listed and described in the file indices_CON.pdf.
DOI: 10.34808/9b43-yh51
title: HwMath: a dataset of handwritten digits and mathematical symbols

description: The dataset contains samples of handwritten digits (0–9) and basic mathematical symbols: +, -, ÷, ×, (, ).Total number of samples: 2,183.

The samples stored in folders named 0–9 are the digits.
'10' is a plus sign: +
'11' is a minus sign: -
'12' is a division sign: ÷
'13' is a multiplication sign: ×
'14' is a left parenthesis symbol: (
'15' is a right parenthesis symbol: )

Each sample is a monochromatic 30x30 pixel image.
DOI: 10.34808/hkjr-eg12
title: XPS study of the YST ceramics

description: Yttrium-doped strontium titanate  was prepared via conventional solid-state reaction method from Y2O3 (Sigma Aldrich, 99,9%), TiO2 (Sigma Aldrich, 99%) and SrCO3 (Sigma Aldrich,98%). For comparision, two other techniques were used for synthesis: Pechini and wet methods. Both kind of samples were measured, after and before reduction process (in a hydrogen). Chemical composition of manufactured samples was measured by XPS method. XPS analyses were carried out with X-ray photoelectron spectrometer (Omicron NanoTechnology) with 128-channel collector. XPS measurements were performed at room temperature in a ultra-high vacuum conditions, below 1.1 x10-8 mBar. The photoelectrons were excited by an Mg-Ka X-Ray source. The X-ray anode was operated at 15 keV and 300 W. Omicron Argus hemispherical electron analyser with round aperture of 4 mm was used for analysing of emitted photoelectrons. The binding energies were corrected using the background C1s line (285.0 eV). XPS spectra were analysed with Casa-XPS software using a Shirley background subtraction and Gaussian–Lorentzian curve as a fitting algorithm.
DOI: 10.34808/dtjz-z733
title: Scanning Electron Microscopy images of nanocubes suspension 1 month after synthesis

description: This dataset contains the SEM images of the gold nanocubes suspension in citrate buffer. The goal of the study was to evaluate the size of the synthesized nanocubes, their stability one month after the synthesis process, and to verify the optimal conditions regarding nanocubes concentration for the SEM analysis. Solutions with two different AuNC concentrations were evaluated (S - concentrated; R - diluted).  Several droplets of AuNC suspension, each containing 2 uL, were placed on the conductive Si wafer. 
The analysis was investigated by scanning electron microscopy (FEI Quanta FEG 250) with an Everhart–Thornley secondary electron detector at an acceleration voltage of 10 kV.