cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.34808/zn7x-e741
title: The power spectral density of audible noise and electric disturbances in ship’s electrical drive systems with frequency converters

description: The presented dataset is part of research focusing on the impact of the ship's electrical drive systems with frequency converters on vibrations and the level of audible noise on ships.
The correlation between the power spectral density of the audible noise level and electric disturbances in the supply line of the motor was examined.
The measurements using a model of the marine drive system with a frequency converter were performed at laboratories of the Department of Ship Automatic Control at Gdynia Maritime University. The 5.5 kW squirrel cage asynchronous motor was connected directly to the output of the frequency converter or through an additional passive LC filter and coupled with the DC generator, which was loaded by an adjustable resistor. The tests took place with the motor voltage frequency set up at 46 Hz and different switching frequencies of an inverter (12 kHz and 6 kHz), for the nominally loaded motor. The sound level meter was pointed directly to the source, positioned at a distance of 1m from the motor lifting eye, in the motor axis of symmetry, from the drive end, 1m above the floor.
The data acquisition of audible noise level (A-weighted), AC motor voltage and current waveforms were carried out with the digital measurement system (shown in Figure). The sampling frequency was equal to 20 kHz.
A power spectral density analysis of all recorded waveforms was carried out in off-line mode, in the LabVIEW environment. The power spectral density was calculated with the use of a Fourier transformation, where the procedure of the spectrum estimator averaging was made at time intervals (section averaging). The resolution of spectral analysis was equal to 5 Hz.  The digital system for measurement and analysis of audible noise and disturbances in the motor supply line, the hardware part (on the left), the software part (on the right).
DOI: 10.34808/y0t7-9169
title: Ball on disk test AW4_41-Al2O3-r25

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: 25 mm. Disk material: Al6061 WC powder injected (AW4_41).
DOI: 10.34808/x828-7w27
title: Micoroalgae bloom detected in Southern Baltic Sea on 25.07.2014

description: The GeoTIFF image presents detected microalgae bloom observed in the Baltic Sea on 25.07.2014. The image has been obtained from the raw AVHRR sensor bands 1 (0.58-0.68 μm) and 2 (0.725-1.0 μm). The resulting single-band raster has been masked to remove all pixels outside of the Baltic Sea region. Pixel values between -0.2 and -0.23 depict progressively higher microalgae concentrations. The image has been verified by comparison with Alg@line measurements, which show a semi-linear corellation between microalgae bloom concentration levels and the value of phycocyanin (PC) reflectance recorded during the same time period.
Detailed information may be found in the assiciated article.
DOI: 10.34808/m46e-9442
title: Electronic transition dipole moment functions of the fourth triplet Sigma ungerade plus state of the Lithium dimer

description: Electronic transition dipole moment functions (ETDMF) of the fourth triplet Sigma ungerade plus (4tSu+) 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/c655-7984
title: Minimal number of periodic points for smooth self-maps of simply-connected manifolds

description: The problem of finding the minimal number of periodic points in a given class of self-maps of a space is one of the central questions in periodic point theory. We consider a closed smooth connected and simply-connected manifold of dimension at least 4 and its self-map f. The topological invariant D_r[f] is equal to the minimal number of r-periodic points in the smooth homotopy class of f. In our analysis we assume that r is odd and all coefficients b(k) of so-called periodic expansion of Lefschetz numbers of iterations are non-zero for all k dividing r and different from 1. We provide the values of the simplified version of the invariant: D_r[f](mod 1) (which is equal either D_r[f] or  D_r[f]+1) for all odd r between 1 and 2000 and for manifolds of dimension 4,5,6,7,8,9,10,11,12,13. Our results are based on the combinatorial scheme for computing D_r[f] introduced by G. Graff and J. Jezierski [J. Fixed Point Theory Appl. 13 (2013), 63-84, https://doi.org/10.1007/s11784-012-0076-1].  The data consists of 5 files dim4_5.txt, dim6_7.txt, dim8_9.txt, dim10_11.txt, dim12_13.txt each of which contains 1000 pairs, where the first place stands for r and the second is the value of the invariant D_r[f](mod 1).
DOI: 10.34808/ggag-hv21
title: Gulf of Gdańsk monitoring conducted by the Institute of Oceanography, University of Gdańsk, in 1981-1994

description: Results of the monitoring of the Gulf of Gdańsk environment are included in this archival data set. The measurements were conducted by the Institute of the Oceanography of the University of Gdańsk (IO UG) from 1981 till 1994 at the fixed sampling stations covering the area located between Hel Peninsula and the coast of the Gulf of Gdańsk, which extended to the Vistula Spit (Krynica Morska) in the east. Field campaigns took place several times during each year. Water physical and chemical properties were determined at the standard depths in the water column. The list of measured parameters includes water salinity and temperature, light-beam attenuation at 535 nm, concentration of biogenic substances, oxygen content as well as water pH. Water transparency was estimated with the use of Secchi disc. The weather conditions during measurements are represented by wind speed and direction (azimuthal angle), cloud cover (0-10 scale), psychrometer readings (dry and wet bulb temperatures). Ice and sea state observations are also given. Manuscripts of annual reports from the monitoring edited by dr Jacek Nowacki, e.g. Nowacki J. et. al., 1986, “Research on hydrology and hydrochemistry of the Gulf of Gdańsk in 1986” (in Polish|), IO UG, are available at the Oceanographical Reading Room, 81-378 Gdynia Poland, Al. Marszałka Piłsudskiego 46.
DOI: 10.34808/y8qh-3e38
title: 3D printed ABS thermoplastic vs. steel. Dry sliding wear test in constant load & velocity ring on flat configuration. Test parameters: print layer thickness and orientation. Test symbol: 039_h_3

description: Data gathered in sliding ring-on-block (flat contact) tribological experiment. Materials: alloy steel (heat treated) vs. ABS plastic.
Rotational specimen (ring) dimensions 15.2 mm ID, 22 mm OD. Non-rotational specimen prismatic: 30x30x5 [mm], FDM 3D printed  of ABS thermoplasic material.  Thicknesses of 3D print layer: 0,39 [mm]. Prismatic specimen orientation in print: vertical horizontal. Prismatic specimen individual number in set: 3.
Test conditions: sliding friction (rotation of the ring specimen), constant load (400N) & velocity (0.1 m/s). Intermittent test regime - sequence of 5 minute consecutive test runs with specimen examination at intermissions.
Output data (time domain): friction coefficient, wear, temperature.
DOI: 10.34808/0vde-kw18
title: Adiabatic potential energy curves of the triplet Pi gerade states of the Lithium dimer

description: Adiabatic potential energy curves of the triplet Pi gerade states have been calculated for the Lithium dimer. The results of the two excited states of the symmetry triplet Pi gerade 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. Presented potentials are ready to compare with the results of other theoretical results and potential energy curves derived from experiments.
The dataset is arranged in three columns. The first column contains distances in Bohr radius units [a0] between Lithium atoms. The consecutive two columns contain potential energies of interaction between Li atoms calculated for corresponding distances. Energies are shown in inverse centimeters units [cm-1]. All curves are tabulated according to internuclear distance from 3.2 [a0] to 88 [a0].
DOI: 10.34808/0fj4-yr13
title: Bacteria in the area of influence of sewage tretment plant Gdynia - Dębogórze in 2009

description: The dataset contains the results of microbiological testing of water from Gulf of Puck in surrounding area of Mechelinki town. The aim of the test was to assess the influence of discharging communal sewage into the waters of Gulf of Gdańsk by sewage pipeline located in Mechelinki town area, on the sanitary condition of these waters. The samples were analysed for: the number of Enterobacteriaceae genus bacteria and the number of Escherichia coli bacteria.
DOI: 10.34808/t5rg-cp75
title: The voltage on bus bars of the main switchboard of the ferry electrical power system during maneuvering

description: The dataset is 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 measurement results carried out onboard the ferry during maneuvering.
The ferry is equipped in a three-phase, three-wire electrical power system. The source of electricity 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 ship'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 free-standing generators have been the main energy source. The parallel operation of each shaft generator with the free-standing generators is possible, especially during a sea voyage with a calm wave surface. Additionally, each of the bow thrusters has been supplied of single shaft generators, the most frequently, in configuration separated from the main electrical power system. The voltage of 220V has been obtained using a transformer.
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. The initial conditioning of the input signals is carried out by optoisolation amplifiers and a low-pass filter module (antialiasing). The formation of the output digital signal from the analog signal takes place in the a/d converter with a resolution of 16 bits and a sampling rate of up to 20 kS/s. Using three channels at the same time allows the maximum sampling rate of 6.6 kS/s. The block diagram of the digital measuring system is shown in Figure.
The files contain voltage waveforms of the output of a/d converters in [V], in three phases for 400 V and 220V networks. The attenuation and offset of the measuring path for the 220 V network are 77.6398 [V/V] and -0.017 V, respectively. For the 380 V network, the attenuation and offset of the measuring path are equal to 134.0123 [V / V] and -0.0175 V, respectively. The sampling frequency is inserted in the first row of the attached files.
The files are described as follows:
ferry_maneuvering_the value of the mains voltage (380 or 220)_in_K (entrance to the Karlskrona port)
ferry_maneuvering_the value of the mains voltage (380 or 220)_in_G (entrance to the Gdynia port)
ferry_maneuvering_the value of the mains voltage (380 or 220)_out_K (departure from the Karlskrona port)
ferry_maneuvering_the value of the mains voltage (380 or 220)_out_G (departure from the Gdynia port)  The block diagram of the digital measuring system
DOI: 10.34808/fcvh-qq85
title: Microbiological analysis of sea water and bottom sediments in Kosakowo – Gdańsk profile

description: This dataset contains the results of microbiological analysis of sea water and bottom sediments in Kosakowo – Gdańsk profile in 2013 - 2014 . The tested material consisted of water samples (surface water and bottom water) and bottom sediment samples. Water and sediment samples were analysed for the following: number of Enterobacteriaceae genus bacteria, number of Escherichia coli, number of intestinal Enterococci, number of Clostridium perfringens bacteria.
DOI: 10.34808/a9pm-gh43
title: Sepulchral plate of James von Werden in St. Mary's Church in Gdańsk

description: The data set concerns epigraphy. It refers to the It refers to the sepulchral plate placed in St. Mary’s Church in Gdańsk which is dedicated to James von Werden, a rich merchant, a provisor of St. Mary Church in Gdańsk, father of Mayor John von Werden, a founder of this sepulchral plate. The data set contains one general photo of the sepulchral plate, transcription of its text in Latin, its Polish translation, and the short biography of the deceased, also in Polish.
DOI: 10.34808/yg8q-5c60
title: Phylogenetic trees of genus Oncidium Sw. based on analysis of DNA sequences

description: Genus Oncidium Sw. is widely regarded as a polyphiletic, and the taxonomic boundaries between him and such genera as Odontoglossum Kunth. or Miltonia Lindley remain blurred. The aim of the study was to determine the phylogenetic relationships within the genus Oncidium s.lato based on the DNA sequences analysis. The correlation between molecular data and geographical distribution of the studied species was also examined. Two markers were used for the analysis: the ITS sequence derived from the nuclear genome and the matK gene that is part of mitochondrial DNA. Sequences were obtained by DNA isolation from frozen leaves, polymerase chain reaction (PCR) and sequencing. For their analysis in the PAUP* program, a feature-based parsimony (MP) method was used, and for assessing the reliability of the resulting trees, the non-parametric bootstrap method. The ITS MP search resulted in 10 000 trees (CI=0.49; RI=0.631). The aligned matrix resulted in 814 characters of which 433 were parsimony informative. The matK MP search resulted in 10 000 trees (CI=0.505; RI=0.714). The aligned matrix resulted in 1359 characters of which 358 were parsimony informative. 
This dataset contains two image files with phylogenetic trees - the first one based on ITS analysis of 190 species and the second one based on the matK analysis of 154 species. The upper numbers above branches are the Fitch values and lower numbers are the bootstrap values. The information about geographical distribution is added.  The dataset includes also two NEXUS files (for ITS and for matK) with DNA sequences.
DOI: 10.34808/823g-1y16
title: Rhetoric at school - a selection of the syllabi from the Academic Gymnasium in Gdańsk - transcription and photographs

description: The following data set comprises a transcription (in txt and docx formats) and photographs (in jpg format) of the selected records from the Latin-language teaching syllabi termed 'Typus' or 'Catalogus lectionum' (an abbreviated title). Rhetoric is the main thematic criterion behind this choice. Various topics related to rhetoric have been taught not only during the classes in rhetoric, or ancient classical languages (ancient Greek and Latin). However, these topics also included theology, history, law as well as logic. All of the syllabi presented in this data set were made in seventeenth century Gdańsk, on the initiative of the local Academic Gymnasium. The authors were the teachers who worked at the school during the seventeenth century, which was officially operated by the Gdańsk city community. The syllabi were a descriptive, more extended version of a school timetable. The syllabi were dedicated to the students of the last two classes of the Academic Gymnasium in Gdansk. These classes were supposed to prepare students for the studies at the university. The syllabi informed about the days and times of the classes but also about the topics covered by the courses (continued or planned topics); the syllabi also presented the selected scientific publications (typically textbooks) which were to be the basis for how the particular lecturers organized the work during their classes.
All of the transcribed syllabi fragments are from the collection of old prints of the Polish Academy of Sciences Gdańsk Library. They have been bound and currently have the reference number Ma 3928 8o (nubers: 106-109).
The texts, which have been photographed, were created before 1801 and are not copyrighted. If you would like to use the photographs included in this data set, please mark that the photographed prints are from the Polish Academy of Sciences Gdańsk Library collection.
A slightly more expanded version of this description can be found in the readme a and b files (txt, csv and xlsx formats) inside this data set.
DOI: 10.34808/r3h7-d082
title: The harmonic distortion of voltage waveforms 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 ship's electrical power system's main switchboard in different states of ship exploitation. The attached dataset contains the results of a harmonic distortion analysis expressed by the total harmonic distortion (THD) coefficient of voltage waveforms recorded during measurements. The measurements were carried out onboard various ships: ferry, ro-ro, and car -carrier.
Each ship contains a three-phase, three-wire electrical power system. The ferry and ro-ro systems' electrical power plant consists of free-standing generating sets and 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 of 1375 kVA each. The main switchboard's nominal voltage on the bus bars 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. The nominal voltage on the main switchboard's bus bars 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 main switchboard's nominal voltage on bus bars 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.
The voltage waveforms on the main switchboard's bus bars were recorded 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 THD is calculated as the equivalent root mean square (rms) voltage of a set of the harmonic frequencies (from the 2nd harmonic on to 40th harmonics) over the rms voltage of the fundamental frequency. The data were multiplied by the Hann window function. The frequency analysis was made using a fast Fourier transform (FFT) for the time frame of 2048 samples. The calculated Fourier transforms components were averaged 10 times. The final THD value was obtained based on the instantaneous values averaged over 40 minutes of the observation time.
  where:
Uh - the rms voltage of the h-th harmonics
 U1 - the rms voltage of the fundamental frequency
DOI: 10.34808/hd2g-f795
title: Emotion Recognition

description: The films presented here were recorded using so-called high-speed camera Phantom Miro. To play the movie  You need the special software which can be downloaded from the web site https://www.phantomhighspeed.com/resourcesandsupport/phantomresources/pccsoftware the details of the movie are available after starting the movie in the viewer in the description window. There is also a plug for open source software like Fiji or Imagej, however movies are quite long (&gt;2GB) so the Phantom Company software is recommended. The recordings show an experiment based on recreating 6 basic emotions based on memory, each mvie represents a different emotion.
DOI: 10.34808/dem0-ez52
title: Electronic transition dipole moment functions of the first singlet Sigma gerade plus state of the Lithium dimer

description: Electronic transition dipole moment functions (ETDMF) of the first singlet Sigma gerade plus (1sSg+) 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. ⟨Ψ_f | DMX or DMY or DMZ | Ψ_i⟩ 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.