cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.34808/1nqp-j041
title: The magnetic field measurements in selected places of the industrial building

description: The dataset is part of a comprehensive study on the assessment of the electromagnetic field intensity in a building of an operating industrial plant. Detailed results of magnetic field measurements, carried out in selected places of this building, are presented.
As a result of preliminary measurements, areas of the strong magnetic field intensities were identified. The purpose of in-depth research was to observe the magnetic field variability occurring at selected measuring points, in the close surroundings to electric hardening furnaces. The measurements confirmed the high dynamics of long-term changes in magnetic field strength, which strongly depends on devices operating nearby.
Magnetic field measurements were carried out during the production shift with the use of the ESM-100 H/E field meter of Maschek. This isotropic meter of the electromagnetic field enables measurements of the magnetic field component within the range from 5 Hz to 400 kHz in four successive measurement subranges: from 5 Hz to 400 kHz (-3dB limit), at the frequency 50 Hz (for 12 dB of the band-pass filter), in the band from 5 Hz to 2 kHz and from 2 kHz to 400 kHz. In each measurement subrange, the meter provides the measurements of magnetic induction in the measuring ranges from 1 nT to 20 mT. The values of the H (magnetic) field are displayed simultaneously in three-dimensional directions x, y, z. All measurements were carried out on the height of 0.8 ±0.1 m from the surface floor. The ESM-100 H/E field meter was controlled by a personal computer using MASCHEK Graph ESM-100 Documentation Software, connected to the meter with the fiber optic cable (Figure on the left). Measurement data was recorded every 5 seconds during the observation, which lasted several minutes. The sketch of the ground floor of the building with the numbering of the rooms and measurement points is shown in Figure on the right.  The block diagram of the measuring system The sketch of the ground floor of the building with the numbering of the rooms and measurement points
DOI: 10.34808/mnxm-1h56
title: The level of Knowledge and use of tax exemptions for R&D activities

description: The following research data contains the answers of 259 entrepreneurs to questions regarding tax reliefs and exemptions for research and development activities. As part of the study answers to the following questions were obtained:Have you ever used the tax relief for new technologies / R&D?Has your company acquired a license / software (intangible asset) in the last 5 years?Have your comapny ever considered undertaking research and development activities?What do you think should be promoted and what should the tax credit for innovation and R&D encourage to do?
DOI: 10.34808/4dj8-8445
title: Simulation of a linear pneumatic actuator with 32 mm piston diameter, 12 mm piston rod diameter and 200 mm stroke

description: The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well as the position and velocity of the piston during the stroke. The simulation results were saved in the default GNU Octave (text) format. The original purpose of the experiments was to obtain data to create a neural model of a pneumatic actuator.[1] Kiczkowiak T.: Algorithms and Models Applied in the Design of Pneumatic Driving Systems (in Polish), Koszalin 2005, Publishing House of Koszalin University of Technology
DOI: 10.34808/z9rr-f261
title: SEM micrographs of aluminium corrosion in alkaline media with various bee products as corrosion inhibitors

description: This dataset contains various scanning electron microscopy (SEM) micrographs of AA5754 aluminum alloy samples exposed to the corrosive alkaline environment without and with the addition of various bee products to act as green corrosion inhibitors. The products are bee pollen, honey, and putty. They were investigated in bicarbonate buffer (pH =10 or =11) with different amounts (0.5 and 5 g) added to 250 mL electrolyte volume. The reference micrographs (labeled as buffer) were made without addition of bee products. The exposure duration was 3 h.
This work is a part of the M.Sc. diploma of Mr. Jedrzej Jasonek. Further studies on bee products as corrosion inhibitors may be found in Electrochimica Acta article: 10.1016/j.electacta.2019.03.012
DOI: 10.34808/45z8-4h72
title: The level of VAT in relation to the GDP of selected European Union countries in 2007-2015 (in%)

description: VAT (Value Added Tax) is part of a strictly harmonized tax within the European Union. Under the so-called The Sixth Directive introduced provisions regulating the subject and subject of taxation, tax exemptions and exclusions as well as the tax collection mechanism in all Member States.
Value added tax is included in the price of goods and services purchased by consumers. Taking into account the general deterioration on the market, changes in the structure and volume of demand and supply, the revenues from this tax change - it is a tax which amount of inflows is closely related to the general economic situation, or more precisely to consumption.
The level of VAT in relation to GDP at the time of the crisis in the European Union countries ranged from 4.9% in Spain to 9.6% in Denmark. A year later, its ratio decreased in ten countries, leaving the aforementioned Spain and Denmark in the first and last positions, in 2009 respectively 3.8% and 9.7% of VAT revenues in relation to GDP.
The following data presents the level of VAT in relation to the GDP of selected European Union countries in 2007-2015.
DOI: 10.34808/sf07-7g64
title: Tax system in Poland - current situation and direction of changes

description: The study conducted on a group of 259 entrepreneurs from various regions of Poland concerns the opinions of business owners on the current tax situation, as well as potential changes in the tax system.
DOI: 10.34808/gw7d-hw29
title: Dynamics of a linear pneumatic actuator with 63 mm piston diameter and 100 mm stroke subjected only to a mass load of 750 g

description: The aim of the study was to determine the dynamics of a linear pneumatic cylinder subjected only to mass load. An actuator of one of the well known European manufacturers was tested.The experiment were to measure pressure changes in both chambers of the actuator and the position of the piston during stroke and retracting. The test was repeated 11 times. The obtained data, besides analysis of the dynamics of the actuator, allow verification of the correctness of its simulation models and even estimation of variable friction forces. The raw measurement data were saved in the default (text) GNU Octave format. The conversion functions for measuring sensors are also given.
DOI: 10.34808/xea9-gy95
title: The statistic properties of rms voltage and frequency in the ship's electrical power system

description: The dataset is a part of the research results on the quality of supply voltage on bus bars of the main switchboard of the ship's electrical power system in different states of ship exploitation. The attached dataset contains the results of a statistical analysis of rms voltage and frequency in the ship's electrical power system. The following statistical attributes were determined: the mean value, the standard deviation, the skewness, and the kurtosis, both for rms voltage and frequency. The measurements were carried out on board various ships: ferry, ro-ro, and car carrier.
Each ship contains a three-phase, three-wire electrical power system. The electrical power plant of the ferry and ro-ro systems consists of free-standing generating sets as well as shaft generators. The source of electrical power is three-phase synchronous generators driven by auxiliary diesel engines. Additionally, shaft generators driven by the propeller shaft of the main engine are used. The ferry’s electrical power plant consists of three free-standing generators of 1400 kVA each, and two shaft generators 1375 kVA each. The nominal voltage on bus bars of the main switchboard was 380 V with a frequency equal to 50 Hz. The ferry was equipped with two free-standing generators of 1000 kVA each and two shaft generators of 1500 kVA each. The nominal voltage on bus bars of the main switchboard was 400 V at a frequency of 50 Hz. The car carrier’s electrical power plant consists of six free-standing generators of 1500 kVA each. The nominal voltage on bus bars of the main switchboard was 3300 V and 440 V with a frequency equal to 60 Hz. All ships were capable of generating the voltage of 220V, and after transformation – 440V, 400V, and 380V as well.
The voltage waveforms on bus bars of the main switchboard were recorder with the digital measuring system, which allows the simultaneous measurement of three phase-to-phase or two-phase voltages. Its hardware part consists of a signal preconditioning block, an antialiasing filter, and a data acquisition board with a resolution of 16 bits and a sampling rate of up to 20 kS/s. The maximum sampling rate is equal to 6.6 kS/s for using three channels at the same time.
The virtual part of the system is realized in the graphical programming environment LabVIEW. The instantaneous values x(i) of voltage and frequency were obtained for the time frame of 1300 (1105) samples, with a sampling frequency of 6500 Hz, which corresponds to ten periods of a sine wave with a frequency of 50 Hz (60 Hz). The mean value, the standard deviation,  the skewness, and the kurtosis were calculated based on of the instantaneous values averaged over 40 minutes of the observation time.
DOI: 10.34808/qjtm-nv53
title: Preparation to ball on disk test Initial contact stress evaluation

description: Evaluation of initial contact stress in tests on wear of Al6061 alloy in ball on disk tribological testing. Research on the reinforcing effect of aluminium alloy injection reinforcement with TiN and WC powders in laser remelted surface layer.
DOI: 10.34808/qk6c-d227
title: Electronic transition dipole moment functions of the third singlet Sigma gerade plus state of the Lithium dimer

description: Electronic transition dipole moment functions (ETDMF) of the third singlet Sigma gerade plus (3sSg+) state have been calculated for the Lithium dimer. ETDMFs are needed in understanding processes like photodissociation, photoassociation, cooling, and trapping of molecules. The results of the five ETDMFs have been obtained by the nonrelativistic multireference configuration interaction (MRCI) method used with pseudopotentials describing the interaction of valence electrons with atomic cores. In this approach, only the valence electrons of the Li atom were treated explicitly. The core polarization potential has been also applied in calculations. All computations were performed by means of the MOLPRO program package. In all internuclear regions, presented ETDMFs reasonably agree with available previously calculated and measured results.
The dataset is arranged in six columns. &lt;Ψ_f | DMX or DMY or DMZ | Ψ_i&gt; is the x or y or z component of the electronic dipole moment between the initial state Ψ_i and the final state Ψ_f of the diatomic Lithium molecule. The first column contains distances in Bohr radius units [a0] between Lithium atoms. The consecutive five columns contain ETDMFs calculated for corresponding distances. All values are given in atomic units. All ETDMFs are provided as functions of the internuclear distance R, ranging from 2 to 90 [a0].
The symbols used for describing the initial (Ψ_i) and final (Ψ_f) states (for example 2tPg or 4sSu+) of the Li2 molecule are the following:
1 or 2 or ... - the electronic initial or final state number;
s or t - singlet or triplet state;
S or P or D - Sigma, Pi or Delta state;
g or u - gerade or ungerade state;
+ is connected only with Sigma states.
DOI: 10.34808/ngvf-ar66
title: Epitaph of Oehm family in St. Mary's Church in Gdańsk

description: The data set concerns epigraphy. It refers to the epitaph placed in St. Mary’s Church in Gdańsk, that is dedicated to Öhm family, rather unknown to Gdańsk. The epitaph was erected by two latest representatives of family – John and Andrew. Data set contains one general photo of the epitaph, transcription of its text in Latin, its translation in Polish, and the biography of the deceased, also in Polish.
DOI: 10.34808/nmgg-xm45
title: Doppler blood flow recordings

description: Vital signals registration plays a grate role in biomedical engineering and education process. Well acquired data allow future engineers to observe certain physical phenomenons as well learn how to correctly process and interpret the data. This data set was designed for students to learn about Doppler phenomena and to demonstrate correctly and incorrectly acquired signals. The data set contains RAW recordings from portable Doppler blood flow detector. Utilized device allows to perform a fast assessment of blood flow in peripheral vessels also in a patient with weak pulse. The used device was equipped with a universal 5 MHz ultrasound probe. The data were recorded from the neck area with and without a gel.
DOI: 10.34808/2jyk-dk30
title: Electronic transition dipole moment functions of the first singlet Sigma ungerade plus and first triplet Sigma gerade plus states of the Lithium dimer

description: Electronic transition dipole moment functions (ETDMF) of the first singlet Sigma ungerade plus (1sSu+) and first triplet Sigma gerade plus (1tSg+) states have been calculated for the Lithium dimer. ETDMFs are needed in understanding processes like photodissociation, photoassociation, cooling, and trapping of molecules. The results of the four ETDMFs have been obtained by the nonrelativistic multireference configuration interaction (MRCI) method used with pseudopotentials describing the interaction of valence electrons with atomic cores. In this approach, only the valence electrons of the Li atom were treated explicitly. The core polarization potential has been also applied in calculations. All computations were performed by means of the MOLPRO program package. In all internuclear regions, presented ETDMFs reasonably agree with available previously calculated and measured results.
The dataset is arranged in five columns. &lt;Ψ_f | DMX or DMY or DMZ | Ψ_i&gt; is the x or y or z component of the electronic dipole moment between the initial state Ψ_i and the final state Ψ_f of the diatomic Lithium molecule. The first column contains distances in Bohr radius units [a0] between Lithium atoms. The consecutive four columns contain ETDMFs calculated for corresponding distances. All values are given in atomic units. All ETDMFs are provided as functions of the internuclear distance R, ranging from 2 to 90 [a0].
The symbols used for describing the initial (Ψ_i) and final (Ψ_f) states (for example 2tPg or 4sSu+) of the Li2 molecule are the following:
1 or 2 or ... - the electronic initial or final state number;
s or t - singlet or triplet state;
S or P or D - Sigma, Pi or Delta state;
g or u - gerade or ungerade state;
+ is connected only with Sigma states.
DOI: 10.34808/zajf-gd78
title: Minimal number of periodic points with the periods less or equal to r in the smooth homotopy class of simply-connected manifolds of dimension 7 and homology groups with the sum of ranks less or equal to10

description: An important problem in periodic point theory is minimization of the number of periodic points with periods &lt;= r in a given class of self-maps of a space. A closed smooth and simply-connected manifolds of dimension 7 and its self-maps f  with periodic sequence of Lefschetz numbers are considered. The topological invariant Jr[f] is equal to the minimal number of periodic points with the periods less or equal to r in the smooth homotopy class of f. For sufficiently large r the invariant Jr[f] is independent of the choice of r and in that case it is natural to write J[f] instead of Jr[f]. We provide the values of the simplified version of the invariant: J[f] (mod 2) (which is equal either J[f] or J[f]+1) for  manifolds of dimension 7 having the sum of ranks of homology groups less or equal 10. The results are based on the combinatorial scheme for computing J[f] introduced in “Minimization of the number of periodic points for smooth self-maps of simply-connected manifolds with periodic sequence of Lefschetz numbers” by G. Graff and A. Kaczkowska, [Cent. Eur. J. Math., 10(6), 2012, 2160-2172, https://doi.org/10.2478/s11533-012-0122-7]. The data contains text files of the form J[vector_of_ranks _of_homology_groups].txt. Each file consists of all possible triples, structured as follows: the first position contains a sequence of lists, where the i-th list corresponds to the degrees of non-zero eigenvalues of the i-th induced homomorphism, the second position contains a set of non-zero periodic expansion coefficients, the third position contains corresponding value of the invariant J[f].
DOI: 10.34808/4s94-s602
title: Electronic transition dipole moment functions of the second singlet Pi gerade and second triplet Pi gerade states of the Lithium dimer

description: Electronic transition dipole moment functions (ETDMF) of the second singlet Pi gerade (2sPg) and second triplet Pi gerade (2tPg) states have been calculated for the Lithium dimer. ETDMFs are needed in understanding processes like photodissociation, photoassociation, cooling, and trapping of molecules. The results of the four ETDMFs have been obtained by the nonrelativistic multireference configuration interaction (MRCI) method used with pseudopotentials describing the interaction of valence electrons with atomic cores. In this approach, only the valence electrons of the Li atom were treated explicitly. The core polarization potential has been also applied in calculations. All computations were performed by means of the MOLPRO program package. In all internuclear regions, presented ETDMFs reasonably agree with available previously calculated and measured results.
The dataset is arranged in five columns. &lt;Ψ_f | DMX or DMY or DMZ | Ψ_i&gt; is the x or y or z component of the electronic dipole moment between the initial state Ψ_i and the final state Ψ_f of the diatomic Lithium molecule. The first column contains distances in Bohr radius units [a0] between Lithium atoms. The consecutive four columns contain ETDMFs calculated for corresponding distances. All values are given in atomic units. All ETDMFs are provided as functions of the internuclear distance R, ranging from 2 to 90 [a0].
The symbols used for describing the initial (Ψ_i) and final (Ψ_f) states (for example 2tPg or 4sSu+) of the Li2 molecule are the following:
1 or 2 or ... - the electronic initial or final state number;
s or t - singlet or triplet state;
S or P or D - Sigma, Pi or Delta state;
g or u - gerade or ungerade state;
+ is connected only with Sigma states.
DOI: 10.34808/28ec-1622
title: Tax preferences in PIT in numbers 2009-2015

description: The follwoing data contain information prepared by the Ministry of Finance on the value of tax preferences by areas of support in Personal Income TAX (PIT) between 2009-2015.
Personal Income Tax (PIT) - a direct tax covering the income earned by natural persons. Personal Income Tax in Poland is regulated by the Act of July 26, 1991. Moreover, the rights and obligations of the taxpayer of this tax result from a number of provisions of the Constitution of the Republic of Poland, many acts and ratified international agreements as well as executive regulations.
The state, with the support of appropriate financial policy, may use taxes to achieve goals other than fiscal.
Legal constructions of tax intervention may consist in the application of periodic or unlimited preferences for specific taxpayers or for a specific activity. Tax relief of a subjective or objective nature, periodic or indefinite, may consist in:
the possibility of deducting certain well-defined expenses from the tax base before tax;the possibility of applying in some cases a tax rate lower than the generally applicable one;the possibility of deducting certain expenses from the tax due.
DOI: 10.34808/805a-h462
title: The SEM micrographs of the synergistic action between cavitation erosion and pitting corrosion on stainless steel 304

description: 



The dataset contains Scanning Electron Micrographs of stainless steel AISI304 samples made after cavitation erosion-corrosion exposure using a vibratory transducer (in accordance with ASTM G32). The micrographs compare the topography of samples subjected to either cavitation erosion (in deionized water), pitting corrosion (in 8% FeCl3 solution, without cavitation) or cavitation erosion-corrosion (cavitation erosion in 8% FeCl3 solution). The experiment lasted between 5 and 240 min, labeled accordingly, with cyclic cavitation exposure in on/off cycles 30s:30s. The samples were mounted directly underneath the ultrasonic transducer.
DOI: 10.34808/6jrs-4z71
title: EU state aid - compatible with the internal market for social reasons

description: The dataset encompasses a choice of Polish and foreign bibliography, together with a list of important individual EC decisions issued in the period 2007-2013 on state aid delivered to final consumers for social reasons ( in Poland and in selected UE member states),  in form of different financial instruments. Thanks to this compilation the reader is enabled to receive basic information on one of the state aid forms used in the EU Member States ( based on art  107.2 TFEU).
DOI: 10.34808/4sq0-gd18
title: Ball on disk test AW4_4-Al2O3-r15

description: Hard particle reinforced Al6061 alloy testing. Laser remelting and kinetic injection of particulate material. Ball on disc tribological test. Ball material: Al2O3. Ball diameter: 5 mm. Sliding path radius: 15 mm. Disk material: Al6061 WC powder injected (AW4_4).
DOI: 10.34808/wf5q-bc07
title: Bacteriological and physicochemical monitoring of inland surface waters within the administrative boundaries of Gdańsk City in 2008

description: The dataset containst the results of a bacteriological and physico-chemical study of inland surface waters within the administrative boundaries of Gdańsk city in 2008. The examined material consisted of water samples collected from four lakes located within the administrative boundaries of Gdańsk, Poland.
DOI: 10.34808/7357-vm62
title: Dynamics of a linear pneumatic actuator with 63 mm piston diameter and 300 mm stroke subjected only to a mass load of 1040 g

description: The aim of the study was to determine the dynamics of a linear pneumatic cylinder subjected only to mass load. An actuator of one of the well known European manufacturers was tested.The experiment were to measure pressure changes in both chambers of the actuator and the position of the piston during stroke and retracting. The test was repeated 11 times. The obtained data, besides analysis of the dynamics of the actuator, allow verification of the correctness of its simulation models and even estimation of variable friction forces. The raw measurement data were saved in the default (text) GNU Octave format. The conversion functions for measuring sensors are also given.