cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.34808/zwtt-8763
title: Audible noise 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 aim of the study was to determine sound power generated by the motor for various motor power supply conditions and to indicate the methods of reducing audible noise. The audible noise in the ship drive system with a frequency converter is generated from different sources like RFI filter or line chokes, intermediate chokes, output chokes or LC sinusoidal filter, inverter fan motor, induction motor, and pump. The effective reduction of audible noise level is using the output filter, connected between the frequency converter and induction motor.
The measurements of audible noise emitted by 5.5 kW squirrel cage asynchronous motor, connected to the output of the manufactured frequency converter were performed at the laboratory of the Department of Ship Automatic Control at Gdynia Maritime University. The block diagram of drive and measurement systems is shown in Figure. In the beginning, the experiments were carried out with the squirrel cage asynchronous motor connected directly to the output of the frequency converter. The drive system was supplied with 3x380 V, through the RFI filter. The RFI filter was used to reduce harmonics in the mains supply. At the next stage, the sinusoidal LC passive filter was connected to the output of the frequency converter. During all tests, the motor was loaded with DC generator and adjustable resistor, and the motor current was set to 8 A. The tests took place with different settings of the motor voltage frequency (20÷50 Hz) and switching frequencies of an inverter (3÷12 kHz). The DC generator was closed inside a sound-absorbing box, to reduce the influence of the loading generator on motor noise measurements.
To measure acoustic noise the ½ inch condenser microphone and sound level meter (Sonopan IM 10) were used, with the following parameter settings: Equivalent Continuous Sound Level A-weighted measurements LAeq, sound level measurement time equal to 10 s and measured sound level range from 35 to 95 dB. Sound power was not determined directly, but using sound (pressure) level.
The sound level meter was pointed directly to the source, positioned at a distance of 1m from the motor lifting eye, at the five measurement points:
in the motor axis of symmetry, from the drive end, 1m above the floor,
in the motor axis of symmetry, from the non-drive end, 1m above the floor,
perpendicularly to the motor axis of symmetry, on the left side, 1m above the floor,
perpendicularly to the motor axis of symmetry, on the right side, 1m above the floor,
1m above the motor.
  The block diagram of the laboratory drive and measurement systems
DOI: 10.34808/d8ww-tp72
title: The voltage on bus bars of the main switchboard of the car carrier electrical power system at sea trials 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 conducted onboard the car carrier at sea trials during maneuvering.
The car carrier is equipped in a three-phase, three-wire electrical power system. The ship'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. 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 440 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 440 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: car_carrier_maneuvering_the value of the network voltage (440 or 220)_the number of the set.
   The block diagram of the digital measuring system
DOI: 10.34808/bkwf-g569
title: Simulation of a linear pneumatic actuator with 100 mm piston diameter, 32 mm piston rod diameter and 25 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/tvvr-fp03
title: Dynamics of a linear pneumatic actuator with 50 mm piston diameter and 150 mm stroke subjected only to a mass load of 930 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: 10.34808/8t7j-2r77
title: The voltage on bus bars of the main switchboard of the ro-ro ship electrical power system during a sea voyage

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 a ro-ro ship during a sea voyage.
The ro-ro ship is equipped in three-phase, three-wire electrical power systems. The ship's electrical power plant consists of two free-standing generators 1000 kVA each and two-shaft generator 1500 kVA each (see Figure 1). The nominal voltage on bus bars of the main switchboard was 400 V with a frequency equal to 50 Hz. The voltage of 220V has been obtained by means of a transformer. The single shaft generator has been used during sea voyage as well as during maneuvering as an energy source of a bow thruster. The each of shaft generators could not work in parallel with other electrical energy sources, excluding short switching time (roughly 2 seconds). The shaft generators have been connected with the remaining system only with the help of a simple circuit breaker. It has been possible thanks to adjusting screw propellers using.
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 2.
The files contain voltage waveforms of the output of a/d converters in [V], in three phases for 400 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 data recorded during a sea voltage is included in the file named ro_ro_voyage.TXT.The file described as ro_ro_transition.TXT contains measurement data, which was recorded during the generator G1 operation, after 2 s the shaft generator SG1 is switching off and after 20 minutes the generator G2 is on.  Figure 1. The electrical power plant configuration on the ro-ro ship  Figure 2. The block diagram of the digital measuring system
DOI: 10.34808/a12t-5h64
title: Dynamics of a linear pneumatic actuator with 63 mm piston diameter and 100 mm stroke subjected only to a mass load of 560 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/p9ya-4c36
title: Electronic transition dipole moment functions of the second singlet Sigma gerade plus state of the Lithium dimer

description: Electronic transition dipole moment functions (ETDMF) of the second singlet Sigma gerade plus (2sSg+) 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: 10.34808/5bcv-2p20
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: 009_v_4

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: 0,09 [mm]. Prismatic specimen orientation in print: vertical. Prismatic specimen individual number in set: 4.
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/vbkj-mt54
title: Determination of changes in viscosity of chitosan cosmetic preparations depending on shear rate.

description: The rheological characteristics of chitosan were made on the basis of a viscosity measurement using a Brookfield viscometer, using LV SC4 - 25 spindles and shear rates from 0.3 to 32 s-1 (Fig. 1). Chitosan solutions at 1% concentrations in acetic acid were prepared. The samples were subjected to storage tests.
The data allowed to characterize the used chitosan preparations and assess their functional parameters as substances modifying the rheology of cosmetic solutions. Fig.1. Brokfield rotational viscometer - model DV-III +.
DOI: 10.34808/3s3m-1y88
title: Tensile test of 1.4571 / X6CrNiMoTi17-12-2 / AISI 316Ti grade austenitic steel

description: Ship structures and their components are build mainly of steel. Hull steel is used to build the hull structure. Some structural elements, such as RSW (Refrigerated See Water) tanks, or LNG (Liquid Natural Gas) tanks - gas transported at temperatures below -162° C, are build from austenitic steels. Austenitic steels have a different microstructure and chemical composition than the ferritic (structural) ones. The consequence of this is their different corrosion and mechanical properties. Austenitic steels are said to be corrosion resistant (stainless). They are also much more plastic than structural steels. They plastic elongation at break, often exceeding 50%. High plasticity of austenitic steels is also proven in low temperatures (below -162° C) which is necessary to keep LNG gas in a liquid state.
The dataset contains a recorded tensile test for austenitic steel marked 1.4571, (X6CrNiMoTi17-12-2) or AISI 316Ti. It is a steel with low carbon content. The tested specimen was cut from a part of the piping system of the ship's LNG gas tank. Test was performed in accordance to PN-EN ISO 6892-1: 2016-09 standard.
DOI: 10.34808/b13c-gc90
title: Simulation of a linear pneumatic actuator with 100 mm piston diameter, 25 mm piston rod diameter and 25 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/zqqh-kq54
title: Photomonitoring of activities carried out as part of prototyping and implementation of the pilot project in the area of the "Polanki" market and its direct neighbourhood, in the Gdańsk-Oliwa district, step1; stage from October 2020 year.

description: The data presents photomonitoring (visual documentation report in the form of photographs) of activities carried out as a part of prototyping and implementation of the pilot project in the area of the “Polanki” market and its immediate vicinity in the Gdańsk-Oliwa district documented in October 2020 year, during the 1st step of the monitoring. The monitoring of the Market covers the spatial, functional and analysis of use by residents. The monitoring was carried out systematically from July 2020 to November 2020 (earlier monitoring was not possible due to the introduction of restrictions related to the COVID 19 pandemic). The full monitoring was carried out through on-site visits using the Monitoring Card. The photographic documentation supplements the full monitoring documentation. The monitoring is the basis for subsequent analyzes used in the implementation of the pilot project of the “Polanki” Market.
DOI: 10.34808/je3v-2303
title: Tensile test of 1.4307 / X2CrNi18-9 / AISI 304L grade austenitic steel

description: Ship structures and their components are build mainly of steel. Hull steel is used to build the hull structure. Some structural elements, such as RSW (Refrigerated See Water) tanks, or LNG (Liquid Natural Gas) tanks - gas transported at temperatures below -162° C, are build from austenitic steels. Austenitic steels have a different microstructure and chemical composition than the ferritic (structural) ones. The consequence of this is their different corrosion and mechanical properties. Austenitic steels are said to be corrosion resistant (stainless). They are also much more plastic than structural steels. They plastic elongation at break, often exceeding 50%. High plasticity of austenitic steels is also proven in low temperatures (below -162° C) which is necessary to keep LNG gas in a liquid state.
The dataset contains a recorded tensile test for austenitic steel marked 1.4307, (X2CrNi18-9) or AISI 304L. It is a steel with low carbon content. The tested specimen was cut from a part of the piping system of the ship's LNG gas tank. Test was performed in accordance to PN-EN ISO 6892-1: 2016-09 standard.
DOI: 10.34808/1200-rr20
title: Adiabatic potential energy curves of the singlet Sigma ungerade plus states of the Lithium dimer

description: Adiabatic potential energy curves of the singlet Sigma ungerade plus states have been calculated for the Lithium dimer. The results of the three excited states of the symmetry singlet Sigma ungerade plus 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 four columns. The first column contains distances in Bohr radius units [a0] between Lithium atoms. The consecutive three 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: 10.34808/0zv0-xv73
title: Electronic transition dipole moment functions of the first singlet Delta gerade and first triplet Delta ungerade states of the Lithium dimer

description: Electronic transition dipole moment functions (ETDMF) of the first singlet Delta gerade (1sDg) and first triplet Delta ungerade (1tDu) 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: 10.34808/1mpz-5n23
title: Simulation of a linear pneumatic actuator with 63 mm piston diameter, 25 mm piston rod diameter and 500 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: 10.34808/95kg-s946
title: Adiabatic potential energy curves of the triplet Sigma gerade plus states of the Lithium dimer

description: Adiabatic potential energy curves of the triplet Sigma gerade plus states have been calculated for the Lithium dimer. The results of the three excited states of the symmetry triplet Sigma gerade plus 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 four columns. The first column contains distances in Bohr radius units [a0] between Lithium atoms. The consecutive three 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].