cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.34808/esak-hn58
title: Description of symmetrical prolate ellipsoid magnetic signature parameters-Be = 50 mT, I = 70 deg, z = 100 m, q = 90 deg, j = 135 deg, a =4 m, e = 1, mr = 100

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:
Per_50%Mx_Bx_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]             Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]            By –  component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]             Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]               x coordinate [m]
Per_50%Mx _y_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]              y coordinate [m]
were:
BE [mT], I [deg], z [m], q [deg], j [deg], mr – relative magnetic permeability
Per_50%Mx – permanent magnetization of an ellipsoid in x direction is equal 50% induced magnetization for q = 90 deg and j = 0 deg
For the following parameters: Be = 50 mT, I = 70 deg, z = 100 m, q = 90 deg, j = 135 deg, a =4 m, e = 1, mr = 100
The names files are:
Per_50%Mx_Bx_50_70_100_90_135_4_1_100      Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_50_70_100_90_135_4_1_100       By – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_50_70_100_90_135_4_1_100       Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_50_70_100_90_135_4_1_100          x coordinate [m]
Per_50%Mx_y_50_70_100_90_135_4_1_100         y coordinate [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:
Per_50%Mx_Bx_50_70_10_90_m90_4_5_100  Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_50_70_10_90_m90_4_5_100  By – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_50_70_10_90_m90_4_5_100  Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_50_70_10_90_m90_4_5_100     x coordinate [m]
Per_50%Mx_y_50_70_10_90_m90_4_5_100     y coordinate [m]
DOI: 10.34808/6qg7-ry63
title: Number of countries with VAT implemented in selected years from 1960 to 2016

description: This dataset shows the number of countries in selected years, from 1960 to 2016, that have implemented a VAT.
DOI: 10.34808/ap4h-kb23
title: Magnetic field maps of an astable multivibrator in frequency range from 30 MHz to 3 GHz – selective detection

description: The data presents a result of near field measurements of electromagnetic emissions radiated from the PCB of a small electronic device.  An efficient method of modelling the magnetic and electric field emissions is the measurements in the near field using electric and magnetic probes. The attached files contain magnetic field maps created on based measurements using H-field Probe RF B 0.3-3 in the frequency range 30 MHz – 3 GHz.  The designated maps enable the location of the sources of high magnetic fields radiated by the tested device. The device under test (DUT) was a typical astable multivibrator supplied from a battery of 9 V (Fig. 1).
Twenty-five measurement points are marked on the PCB, located exactly above the elements of the DUT (Fig. 2). The near fields were measured directly on the surface of PCB. The probe was placed at the same distance from the PCB surface, regardless of the height of the elements. The probe RF B 0.3-3 is a passive near-field probe. The coil inside the probe head is positioned at a 90° angle from the shaft. For measurements, it can be positioned directly onto the measured object. Field lines from other sources entering the probe head laterally are not detected. The probes provide a high resolution of less than 2 mm. The average value of the voltage at the probe output was measured at all points with an oscilloscope. Each measurement was performed for the averaged instantaneous values (the number of averages above 300) for both the background, i.e. the device turned off and the device turned on. All results of measurements made with near field probes are presented in mV. This is due to the measurement of the voltage at the output of the probe for both electric and magnetic fields. In Figure 3, the near-field measurement system developed to measure the radiated emission is shown.
The attached files contain magnetic field maps and the table with the measurement results.  Figure 1. The electronic diagram of the AVT 720 device Figure 2. Arrangement of measurement points on the DUT  Figure 3. The near-field measurement system
DOI: 10.34808/q2ma-nm09
title: Description of symmetrical prolate ellipsoid magnetic signature parameters-Be = 50 mT, I = 70 deg, z = 200 m, q = 80 deg, j = 45 deg, a =4 m, e = 8, mr = 100

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:
Per_50%Mx_Bx_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]             Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]            By –  component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]             Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]               x coordinate [m]
Per_50%Mx _y_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]              y coordinate [m]
were:
BE [mT], I [deg], z [m], q [deg], j [deg], mr – relative magnetic permeability
Per_50%Mx – permanent magnetization of an ellipsoid in x direction is equal 50% induced magnetization for q = 90 deg and j = 0 deg
For the following parameters: Be = 50 mT, I = 70 deg, z = 200 m, q = 80 deg, j = 45 deg, a =4 m, e = 8, mr = 100
The names files are:
Per_50%Mx_Bx_50_70_200_80_45_4_8_100      Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_50_70_200_80_45_4_8_100       By – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_50_70_200_80_45_4_8_100       Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_50_70_200_80_45_4_8_100          x coordinate [m]
Per_50%Mx_y_50_70_200_80_45_4_8_100         y coordinate [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:
Per_50%Mx_Bx_50_70_10_90_m90_4_5_100  Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_50_70_10_90_m90_4_5_100  By – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_50_70_10_90_m90_4_5_100  Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_50_70_10_90_m90_4_5_100     x coordinate [m]
Per_50%Mx_y_50_70_10_90_m90_4_5_100     y coordinate [m]
DOI: 10.34808/35dw-pa64
title: The conducted immunity test of a power supply unit in the frequency range from 19 MHz to 26 MHz for the RF voltage level of 1 V

description: The dataset presents a result of measurements that are a part of immunity tests to conducted disturbances, induced by radio-frequency fields. The immunity tests were carried out on the mains cable of the DF1723003TC NDN power supply unit. Tests of immunity of electronic systems to conducted disturbances in the frequency range from 19 MHz to 26 MHz were performed under the requirements specified in the electromagnetic compatibility (EMC) standards. Immunity tests were carried out for the RF voltage level of 1 V. The output voltage generated by the power supply unit was 1 V, 10 V, 20 V and 30 V respectively.
The source of the disturbance is an electromagnetic field coming from the integrated signal generator Teseq NSG 4070-45, equipped with a built-in 45 W class A power amplifier module. The coupling-decoupling network CDN M016 directly injects RF voltages into the cables under test. During the measurements, on the Rohde&Schwarz RTE 1102 oscilloscope, the differences in the shape of the voltage waveform from the output of the power supply unit to the reference waveforms recorded with the RF signal generator turned off were being observed. The power supply unit and the oscilloscope were connected to the network via artificial networks Rohde Schwarz ENV432. The measurement process was controlled by the WIN 6000 software installed on a personal computer connected to the signal generator via the IEEE488 interface. The test setup is shown in Fig.1.
The normative test procedure is carried out in the frequency range from 150 kHz to 230 MHz. The RF signal is modulated with a 1 kHz sinusoidal tone at 80% depth. By analyzing the results of standard immunity tests presented in [Kwiatkowski, M., & Pałczyńska, B. (2021). The conducted immunity test of a power supply unit in accordance with EMC standards [Data set]. Gdańsk University of Technology. https://doi.org/10.34808/s4e7-xw34], the frequency range from 19 MHz to 26 MHz was selected, in which the shape of the signal waveform from the output of the power supply unit differs most from the reference waveform. The immunity test procedure was carried out in the frequency range starting at 19 MHz and incrementing in 0.1% steps up to 26 MHz.
The attached files contain oscillograms showing the voltage waveforms at the output of the power supply unit that deviates the most from the reference waveform. Additionally, a table with the measurement results is included.  Figure 1. Configuration of the measuring system for the immunity test
DOI: 10.34808/aawe-ps42
title: High resolution XPS analysis of BDD electrode functionalization steps towards SARS-CoV-2 detection

description: This dataset contains the results of the high-resolution XPS analyses of a set of boron-doped diamond (BDD) electrodes after consecutive functionalization steps toward anchoring of a receptor capable of SARS-CoV-2 virus detection. The analysis was carried out in the binding energy range of C1s, N1s, O1s, Ni2p3/2. The measurements were carried out on Escalab 250Xi spectroscope (Thermofisher Scientific). The dataset requires the use of Avantage software to work (ThermoFisher Scientific).
The steps are: reference bare electrode (label: bare), self-organized monolayer with COOH surface groups (label: 74), after EDC\NHS chemistry (label: 75), after NTA-NH2 (label: 76), after Ni-NH2 (label: 77), after ACE2 receptor anchoring (label: 78). The details of the modification and measurement are presented in the publication  (https://chemrxiv.org/engage/chemrxiv/article-details/6225c07c7c13f42dc16a0836).
DOI: 10.34808/z91h-1k82
title: Description of symmetrical prolate ellipsoid magnetic signature parameters-Be = 50 mT, I = 70 deg, z = 20 m, q = 100 deg, j = 45 deg, a =4 m, e = 8, mr = 100

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:
Per_50%Mx_Bx_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]             Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]            By –  component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]             Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]               x coordinate [m]
Per_50%Mx _y_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]              y coordinate [m]
were:
BE [mT], I [deg], z [m], q [deg], j [deg], mr – relative magnetic permeability
Per_50%Mx – permanent magnetization of an ellipsoid in x direction is equal 50% induced magnetization for q = 90 deg and j = 0 deg
For the following parameters: Be = 50 mT, I = 70 deg, z = 20 m, q = 100 deg, j = 45 deg, a =4 m, e = 8, mr = 100
The names files are:
Per_50%Mx_Bx_50_70_20_100_45_4_8_100      Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_50_70_20_100_45_4_8_100       By – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_50_70_20_100_45_4_8_100       Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_50_70_20_100_45_4_8_100          x coordinate [m]
Per_50%Mx_y_50_70_20_100_45_4_8_100         y coordinate [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:
Per_50%Mx_Bx_50_70_10_90_m90_4_5_100  Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_50_70_10_90_m90_4_5_100  By – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_50_70_10_90_m90_4_5_100  Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_50_70_10_90_m90_4_5_100     x coordinate [m]
Per_50%Mx_y_50_70_10_90_m90_4_5_100     y coordinate [m]
DOI: 10.34808/1td5-5q46
title: Description of symmetrical prolate ellipsoid magnetic signature parameters-Be = 50 mT, I = 70 deg, z = 20 m, q = 80 deg, j = 135 deg, a =4 m, e = 1, mr = 100

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:
Per_50%Mx_Bx_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]             Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]            By –  component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]             Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]               x coordinate [m]
Per_50%Mx _y_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]              y coordinate [m]
were:
BE [mT], I [deg], z [m], q [deg], j [deg], mr – relative magnetic permeability
Per_50%Mx – permanent magnetization of an ellipsoid in x direction is equal 50% induced magnetization for q = 90 deg and j = 0 deg
For the following parameters: Be = 50 mT, I = 70 deg, z = 20 m, q = 80 deg, j = 135 deg, a =4 m, e = 1, mr = 100
The names files are:
Per_50%Mx_Bx_50_70_10_90_135_4_1_100      Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_50_70_10_90_135_4_1_100       By – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_50_70_10_90_135_4_1_100       Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_50_70_10_90_135_4_1_100          x coordinate [m]
Per_50%Mx_y_50_70_10_90_135_4_1_100         y coordinate [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:
Per_50%Mx_Bx_50_70_10_90_m90_4_5_100  Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_50_70_10_90_m90_4_5_100  By – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_50_70_10_90_m90_4_5_100  Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_50_70_10_90_m90_4_5_100     x coordinate [m]
Per_50%Mx_y_50_70_10_90_m90_4_5_100     y coordinate [m]
DOI: 10.34808/4aby-xn07
title: Distribution of Relaxation Times analysis results for SOFC with Sr1.05Ti0.30Fe0.70O3-d cathode at different oxygen partial pressures at 700 °C

description: This dataset contains results of Distribution of Relaxation Times analysis for SOFCs with Sr1.05Ti0.3Fe0.7O3-δ  cathode sintered at 1000 °C. For DRT analysis freely available DRTTool from the prof. Ciucci group was utilised. EIS characterisation of the fuel cells was performed on an Open Flanges™ test setup by Fiaxell. The fuel cell were heated up to 750 °C (3 °C min-1) for reduction and then cooled down to 700 °C for the main test after 24 h stabilisation. Fuel cell tests were conducted with the total flow rates of 100 ml min-1 and 200 ml min-1 on anode (50% steam / 50% H2) and cathode side, respectively. Solartron 1260/1287 frequency analyser was used for EIS measurement.
DOI: 10.34808/ms5k-9364
title: District development concept – Gdańsk-Lower City (Dolne Miasto) district case study, study proposal no 2, May 2021

description: The data presents results of work within the studies of the concept of development of the district in the context of the city, Gdańsk-Lower  City (Dolne Miasto) district, study proposal no 2, from May 2021. The goal of the research process was to present the development concept of the area located in Gdańsk-Lower City (Dolne Miasto) district in the context of the city of Gdańsk development. The aim of the study was to present the main concept for the development of the chosen area and taking in consideration development of the entire city. The dataset presents the development concept of the district in the form of the main concept plan for the development of the district, design project axonometry, sections, functional diagrams, idea explanation and model. The dataset presents the study and design work of students of the Faculty of Architecture, Gdańsk University of Technology (FA Gdańsk Tech) - 6th semester of the Bachelor Studies (undergraduate studies) at the FA Gdańsk Tech coordinated by  Łukasz Bugalski PhD. The preparatory process, studies and design was conducted from April 2021 till May 2021. The study and design results in the dataset are the effect of the course of urban planning IV at the Faculty of Architecture, Gdańsk University of Technology 2020/2021 academic year. The study and design results in dataset form the basis for the further research and development studies of the district.
DOI: 10.34808/87ha-7x14
title: Description of symmetrical prolate ellipsoid magnetic signature parameters-Be = 50 mT, I = 70 deg, z = 20 m, q = 90 deg, j = 135 deg, a =4 m, e = 4, mr = 100

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:
Per_50%Mx_Bx_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]             Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]            By –  component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]             Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]               x coordinate [m]
Per_50%Mx _y_[BE]_[I]_[z]_[q]_[j]_[a]_[e]_[mr]              y coordinate [m]
were:
BE [mT], I [deg], z [m], q [deg], j [deg], mr – relative magnetic permeability
Per_50%Mx – permanent magnetization of an ellipsoid in x direction is equal 50% induced magnetization for q = 90 deg and j = 0 deg
For the following parameters: Be = 50 mT, I = 70 deg, z = 20 m, q = 90 deg, j = 135 deg, a =4 m, e = 4, mr = 100
The names files are:
Per_50%Mx_Bx_50_70_20_90_135_4_4_100      Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_50_70_20_90_135_4_4_100       By – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_50_70_20_90_135_4_4_100       Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_50_70_20_90_135_4_4_100          x coordinate [m]
Per_50%Mx_y_50_70_20_90_135_4_4_100         y coordinate [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:
Per_50%Mx_Bx_50_70_10_90_m90_4_5_100  Bx – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_By_50_70_10_90_m90_4_5_100  By – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_Bz_50_70_10_90_m90_4_5_100  Bz – component of the ellipsoid magnetic flux density [nT]
Per_50%Mx_x_50_70_10_90_m90_4_5_100     x coordinate [m]
Per_50%Mx_y_50_70_10_90_m90_4_5_100     y coordinate [m]
DOI: 10.34808/cd4h-h131
title: Forest habitat types in the State Forests and their age structure in the years 2014-2018

description: The dataset contains data illustrating the area occupied by various types in the State Forests and their age structure over the years 2014-2018. It should be noted that this only concerns forests managed by the State Forests National Forest Holding. The average age is determined as a weighted average, with the area in individual age classes and subclasses taken as the weight. The term forest area refers to the area of forests excluding land related to forest management. The main source of information for the study is the Forest Data Bank (www.bdl.lasy.gov.pl).
The habitat types included in the dataset are:

Bb – swamp forest
BbG – mountain swamp forest
BG – mountain forest
BMb – mixed swamp forest
BMG – mixed mountain forest
BMśw – fresh mixed forest
BMw – moist mixed forest
BMwyż – upland mixed forest
Bs – dry forest
Bśw – fresh forest
Bw – moist forest
BWG – mountain moist forest
LG – mountain forest
Lł – riparian forest
LłG – mountain riparian forest
Lłwyż – upland riparian forest
LMb – mixed swamp forest
LMG – mixed mountain forest
LMśw – fresh mixed forest
LMw – moist mixed forest
LMwyż – upland mixed forest
Lśw – fresh forest
Lw – moist forest
Lwyż – upland forest
Ol – alder forest
OlJ – ash-alder forest
OlJG – mountain ash-alder forest
OlJwyż – upland ash-alder forest

Types of vertical stand structure:

KO – regeneration class
KDO – pre-regeneration class
BP – structure