Wyniki wyszukiwania - Biblioteka Nauki

1

Position control of DC motor using fractional order controller

100%

Ruszewski A. , Sobolewski A.

Archives of Electrical Engineering

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2013

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tom Vol. 62, nr 3

505--516

EN

The paper presents the problem of position control of DC motor with rated voltage 24 V loaded by flywheel. The fractional order PD controller implemented in National Instruments NI ELVIS II programmed in LabView is used for controlling. The simple method for determining stability regions in the controller parameters space is given. Knowledge of these regions permits tuning of the controller and ensures required the phase margin of the system.

2

The /r/ which dies hard – a diachronic look at the developments of the rhotic sound in selected Celtic, Germanic and Romance languages

100%

Jaskuła K.

Lublin Studies in Modern Languages and Literature

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2018

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tom 42

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nr 1

DE

Der Band enthält die Abstracts ausschließlich in englischer Sprache.

EN

Phonetically, the archetypal rhotic /r/ is a coronal speech sound that is often half-way between consonants and vowels, usually acting in words as a consonant syllable-wise. Its positional and structural functions in selected languages are described here from a diachronic perspective.

FR

Le numéro contient uniquement les résumés en anglais.

RU

Том не содержит аннотаций на английском языке.

3

POLACY WE WSPÓŁCZESNYM ŻYCIU DIASPORALNYM

100%

Chodubski A.

Polityka i Społeczeństwo

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2014

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nr 1(12)

7-16 (10)

EN

The article is an attempt to produce an original insight into the functioning of the Polish milieus abroad. It presents an attempt at assessing the current position of the Polish diaspora; its organizational potential; cultural activities; the role of contemporary migration processess as well as the changing position of the Catholic Church. Because of the vast scope of the analytical field, the Author chooses to focus on selected aspects of the diaspora life – those that are, in his opinion, the most important nowadays.

4

The position and FSP role of -ly adverbials in small distributional fields

100%

Smolka V.

Linguistica Pragensia

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2019

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tom 29

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nr 2

147-159

EN

In the theory of FSP, context-independent adverbials are usually interpreted as constituting either the setting or specification, with the line between the two sometimes difficult to draw. Adverbials in -ly have been shown to be nearly always context-independent, functioning as a specification and generally being more dynamic than the verb. At the same time, the CD of these adverbials is thought to be higher when they are placed after the verb than when they precede it. The present research explores sentence structures such as she smiled coldly, where the adverbial is the only complement of the verb in addition to a non-rhematic subject. Examples of these structures retrieved from the BNC show that the SVA sequence is considerably more frequent than SAV (she coldly smiled), while the proportion of the two variants is more balanced when there are other postverbal complements in addition to the adverbial, as in she coldly analysed his features/she analysed his features coldly. This paper aims to show that among the SVA structures in question, there are instances where the verb is actually more dynamic than the context-independent adverbial, and where linear modification is weakened as an indicator of FSP. These conclusions seem to be supported, among other clues, by translation into Czech.

5

Comparison of Knowledge and Attitudes Towards the Use of Scientific Research in Clinical Practice Among Departmental and Charge Nurses

88%

Belowska J. , Panczyk M. , Gotlib J.

Polish Journal of Public Health

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2015

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tom 124

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nr 3

138-144

EN

Introduction. The awareness of benefits arising from the use of the latest results of scientific research (EBNP – Evidence-Based Nursing Practice) among departmental and charge nurses is a necessary condition to ensure effective and safe health services and nursing care meeting the highest standards of patient care. Aim. The comparison of knowledge of and attitudes towards EBNP among nurses depending on their position. Material and methods. Twenty one departmental nurses (PO) (mean age 50.38 years, min. 37, max. 62, SD=7.35) and 20 Bachelor's degree students of a bridge programme (SSP) (mean age 43 years, min. 34, max. 55, SD=6.37). Qualitative study and analysis of the results, structured interview, extended focus. Results. PO and SSP were not able to define the acronyms EBM and EBP correctly and did not have detailed knowledge of the criteria for assessment of reliability of scientific literature. A majority of DN was familiar with the available journals for nurses and was aware of benefits resulting from using EBNP. The use of EBNP in everyday clinical practice in SSP group was limited by a lack of time, insufficient knowledge of English and access to the Internet, as well as working at the position that makes taking decisions on developing procedures and standards for nursing care impossible. Conclusions. 1. The level of knowledge about EBNP in both groups was inadequate and needs urgent supplementation of knowledge and skills of nurses with reference to this subject area. 2. The attitudes of nurses towards EBNP were different depending on their work position. Departmental nurses were aware of benefits resulting from using the most recent study results in everyday clinical practice and being up-to-date with medical knowledge. 3. The boundaries limiting the use of EBNP in everyday clinical practice by the study participants were objective and they require system changes with reference to the organization of work and the system of continuing education.

6

Some simple invariants of the position of a surface in [R^4]

88%

Rosicki W.

Bulletin of the Polish Academy of Sciences. Mathematics

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1998

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tom Vol. 46, no 4

335-344

EN

In this paper we introduce certain simple invariants of Roseman moves on surfaces in [R^4]. In this way we obtain invariants of the position of a surface in [R^4].

7

PROFESSIONAL EFFECTIVENESS OF OFFICIAL-OFFICERS STARTING SERVICES IN MILITARY UNITS AND SAFETY

88%

KUŹNIAR Z. , WEŁYCZKO L.

Kultura Bezpieczeństwa. Nauka – Praktyka – Refleksje

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2017

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tom 28(28)

144-157

EN

This article presents the most important aspects related to the efficiency of task-oriented future officers-commanders, who must be professionally prepared to take their first official position – the platoon commander. This is an important aspect because only high-class commanders are able to prepare their soldiers and subunits – in accordance with their military use both in time of peace and in the conditions of its threat (crisis or war). This article is an attempt to indicate the above-mentioned but very important problems regarding the competence of the officers-commanders.

8

Performance analysis between a hybrid force/position and conventional controllers for a wrist exoskeleton

88%

Avilés V. , Avilés O. F. , Aponte J. , Caldas O. I. , Mauledoux M. F.

Archives of Control Sciences

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2022

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tom Vol. 32, No. 2

409--427

EN

This study analyses the performances of various path controlling strategies for a 3-degrees of freedom wrist exoskeleton, by comparing key indicators, such as rise time, steady-state error, and implementation difficulty. A model was built to describe both system’s kinematics and dynamics, as well as 3 different controllers (PID, PD+, and a hybrid force/position controller) that were designed to allow each joint to perform smooth motions within anatomic ranges. The corresponding simulation was run and assessed via Matlab (version 2020a). In addition to the performance comparison, remarkable characteristics could be identified among controllers. PD+ showed higher response speed than the other controllers (about 4 times), and PID was reinforced as the technique with the easiest implementation due to the smallest matrices. The study also allowed to greater potential of the hybrid controller to interact with its environment, i.e., the robotic device.

9

The prototype project of the position to designate the screw thruster lobe specific gravity

88%

Kończewicz W. , Stępkowski M. , Skowroński M. , Iwanicki L.

Journal of KONES

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2014

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tom Vol. 21, No. 3

165--170

EN

During the exploitation screw thruster, lobes are being defected in many ways. Sample types of damages are as follow: the material damages caused by cavitation, corrosion, deflection. In order to facilitate and to improve the quality of repairing activities, the idea of make the position to designate screw thruster lobes specific gravity has been initiated by Rolls-Royce Poland Company and Nautica Academic Circle. Incorrect lobes balance influences on irregular work of the screw, which results in the occurrence of adverse effects such as generation of vibration or increasing probability of mechanical elements damages during the exploitation. Screw thruster lobe specific gravity designation helps in identification of areas for treatment (welding, grinding) to achieve the desired parameters. The creation of designate screw thruster lobes specific gravity position gave the possibility of using the innovative scanning in 3D, which shows very clearly the picture of the scanning item. With Scanect and Autodesk Inventor 2014 software, we can manipulate the resulting image. This makes possibility of the lobes gabarits measurement. What is more, it designates the specific gravity exact to 10%.It increases the quality of the lobe renovation and these results in an improvement the screw thruster lobe’s work efficiency.The cooperation of The Maritime University in Gdynia and Rolls-Royce Poland Company resulted in creating the prototype, which will be tested by service technics in working circumstances.

10

A Constitutional Coup! The Take-Down of the First President of the Republic of Kosovo

75%

Sejdiu K. R.

Academicus. International Scientific Journal

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2013

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nr 08

56-77

EN

A coup d’etat is defined as “a sudden and decisive action in politics, especially one resulting in a change of government illegally or by force.” As one looks through all the coup d’etats that have occurred throughout the history in various parts of the world, one can observe that often the protagonists of such events are political enemies, military leaders, or distressed insiders. Indeed, one is hard pressed to find where a coup d’etat has been executed by way of a poor legal reasoning of a Constitutional Court. Well, that is until now! In the newest country in Europe, the Republic of Kosovo, major international and domestic investments are being made on institution building. One of the beneficiaries of such investments has been the newly formed Constitutional Court of the Republic of Kosovo. Soon after its establishment, this young court faced its first tough decision, namely a challenge to the President of the country regarding his alleged serious violation of the Constitution by holding posts as President of the country and Chairman of his party. In a highly controversial case, marred with procedural irregularities, judicial misconduct, lack of due process, human rights violations, regular media leaks, and behind-the-scenes international and domestic political influences on the Court, a split Court decided that the President had seriously violated the Constitution. This decision led to the President’s resignation, which caused a political imbalance that still lingers, further harming Kosovo’s long term interests and prospects. But more importantly, some argue that this marks the first case where a coup d’etat that took down a President was executed by a Constitutional Court. This paper argues that the Court should have dismissed the claim of the MPs as inadmissible on procedural grounds, specifically that it was filed by the MPs after the time permitted by law and that the MPs never maintained the number of 30 members that were needed for the group to be an authorized party. Additionally, even on the merits, the Court failed to distinguish between the constitutional requirement to not exercise a party function, which the President in this case did not do, but rather simply held the position in a suspended mode. Moreover, even had the President’s holding of the position amounted to a violation of the Constitution, in no way did that equate to a serious constitutional violation. Still, the Court held contrary to the Constitution, applicable laws, and the available evidence before it and found that the President had seriously violated the Constitution.

11

Influence of upper extremity position on EMG signal measures calculated in time, frequency and time-frequency domains

75%

Wang J. , Bartuzi P. , Roman-Liu D.

Acta of Bioengineering and Biomechanics

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2013

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tom Vol. 15, nr 4

83--91

EN

The aim of this study was to investigate the relationship between time-frequency, time and frequency measures when considering various upper extremity positions below the level of the shoulder and in trapezius as well as deltoideus muscles. During the experiment, 15 subjects performed a task that involved screwing and unscrewing a screw cap on a board in six different locations, i.e., there were six upper extremity positions. Variables were calculated in the time, frequency and time-frequency domains on a recorded EMG signal. The results showed that parameters analyzed in the time-frequency domain were more sensitive to changes in position than parameters analyzed in the frequency domain.

12

Wyznaczanie pozycji i orientacji łopatki w procesie zrobotyzowanego szlifowania

63%

Burghardt A. , Kurc K. , Szybicki D. , Łabuński W.

Modelowanie Inżynierskie

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2019

|

tom T. 40, nr 71

19--25

PL

Przemysł lotniczy wymaga wysokiej jakości i dokładności wykonania wytwarzanych elementów, stąd konieczne jest zapewnienie jak najlepszej kontroli jakości. Proces inspekcji wykonanego detalu powinien przebiegać w taki sposób, aby wpływ na mierzony element był jak najmniejszy. Idealnym rozwiązaniem mogą być badania z użyciem skanerów optycznych. Jednak ze względu na długi czas pojedynczego pomiaru oraz konieczność nakładania powłoki anty refleksyjnej taki proces nie sprawdza się w produkcji. W pracy zaprezentowano koncepcję zrobotyzowanego stanowiska do pomiaru, orientacji i geometrii łopatki turbiny silnika lotniczego. Stacja składa się z robota przemysłowego wyposażonego w chwytak oraz stanowiska pomiarowego zaopatrzonego w laserowe czujniki odległości. Zmierzone wielkości zostają przesłane z modułu pomiarowego do kontrolera robota za pomocą protokołu transmisji danych. Przesłane dane mogą zostać wyświetlone na panelu operatorskim lub wykorzystane do przygotowania raportu. W porównaniu z pomiarem z wykorzystaniem skanera optycznego cały proces zajmuje znacznie mniej czasu. Na podstawie przygotowanych modeli CAD oraz wykorzystując notację Denavita-Hartenberga, wyznaczone zostały pozycja i orientacja łopatki w odniesieniu do układów współrzędnych robota oraz stanowiska pomiarowego.

EN

The aerospace industry requires high quality and precision of the manufactured parts thus it is necessary to ensure the best possible quality control. The inspection process of the workpiece should be done in such a way that the impact on the measured element is as small as possible. The ideal solution can be research using optical scanners. However, due to the long-time of a single measurement and the need to apply an anti-reflective coating, such process does not work in production. The paper presents the concept of a robotic station for measuring, orientation and geometry of an aircraft engine turbine blade. The station consists of an industrial robot equipped with a gripper and a measuring station equipped with laser sensors of distance. The measured quantities are transferred from the measurement module to the robot controller by means of a data transmission protocol. The transferred data can be displayed on the operator panel or used to prepare a report from a measurement. In comparison with the optical scanner, the entire process takes much less time. Based on the prepared CAD models and using the Denavit-Hartenberg notation, the positions and orientation of the blade were determined in relation to the robot coordinate systems and the measurement position.

13

Simulation of the movement of four-bar spatial linkage

63%

Budniak Z. , Bil T.

International Journal of Applied Mechanics and Engineering

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2012

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tom Vol. 17, no. 3

723-732

EN

In this article, the use of the potential of CAD/CAE modern systems was presented for the modeling and kinematic analysis of the spatial four-bar linkage. The simulation model that was developed on the grounds of the methodology proposed, allowed numerical analyzes. The results of these analyses are presented in charts.

14

Stabilizacja stanowiska tachimetru podczas pomiarów w geodezji inżynieryjnej

63%

Bednarek S.

Przegląd Geodezyjny

|

2019

|

tom R. 91, nr 3

23--25

PL

Na wstępie zostały podane trudności związane ze stabilizacją stanowiska tachimetru podczas pomiarów w geodezji inżynieryjnej. Opisano szczegółowo budowę i sposób użycia dwóch innowacyjnych stawideł do stabilizacji tej pozycji. W pierwszym z tych stawideł wykorzystano podciśnienie, a w drugim pole magnetyczne. Zaletami tych stawideł są skuteczność, prosta konstrukcja, niskie koszty i możliwość samodzielnego wykonania.

EN

In the introduction there are mentioned difficulties in stabilization of tachymeter position during measurements in the land surveying. The construction and applied method of two innovative devices for position stabilization are described in details. Subatmospheric pressure is used in the first device and the magnetic field is used in the other one. Efficiency, simple construction, low cost and possibilities of home-making are main advantages of those devices.

15

Control of a redundant 7DOF upper-limb power-assist exoskeleton robot

63%

Hayashi Y. , Kiguchi K. , Dubey R.

Journal of Artificial Intelligence and Soft Computing Research

|

2011

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tom Vol. 1, No. 3

207--214

EN

Many kinds of power-assist robots have been developed in order to assist daily activities or rehabilitation of the elderly or physically weak persons. Upper-limb power-assist robots are important to assist in many daily life activities such as eating, drinking, etc.. A human upper-limb has 7 degrees of freedom to achieve various tasks dexterously. Therefore, to assist all upper-limb joint motions of a human, the upper-limb power-assist robot is required to have 7DOF. To achieve a desired task, a person moves the hand to the desired position and orientation and/or applies certain amount of force to the target. Therefore, it is important that the upper-limb power-assist robots help control the hand position/ orientation or hand force of the user. However, the hand position/orientation or hand force is 6-dimensional vector, so the 7DOF upper-limb power-assist robot has a redundancy and in general, a pseudo-inverse matrix is used in the control. In this paper, an optimal control method is proposed to deal with the redundancy of the upper-limb power-assist exoskeleton robot considering comfortable motion of the user. The motion intention and the comfort of the user are taken into account in the pro-posed method. The effectiveness of the proposed method was evaluated by the experiments.

16

Pomiary aeroakustyczne dwustopniowej turbiny osiowej

63%

Błaszczak J. , Kęsik P.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

|

2010

|

tom nr 137

67-78

PL

W pracy przedstawiono wyniki eksperymentów aeroakustycznych zrealizowanych dla przypadku dwustopniowej turbiny niskiego ciśnienia umieszczonej w komorze bezechowej. Przeprowadzone testy są kontynuacją wcześniejszych badań prowadzonych w Instytucie Maszyn Przepływowych Politechniki Łódzkiej. Celem było wykazanie m.in. zależności między ustawieniami względem siebie kierownic turbiny oraz natężeniem emitowanego dźwięku.

EN

n the paper aeroacoustic experimental results performed in anechoic room for the case of a two-stage low-pressure turbine are presented. The tests are a kind of continuation of earlier studies provided in the Institute of Turbomachinery, technical University of Lodz. One of the task, among other ones, was to show any dependencies between stator-to-stator clocking position and the intensity of emitted noise.

17

SBAS/EGNOS enabled devices in maritime

63%

López M. , Anton V.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

|

2018

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tom Vol. 12, no. 1

23--27

EN

Nowadays, it is a fact that Global Navigation Satellite Systems (GNSS) have become the primary means of obtaining Position, Navigation and Timing (PNT) information at sea. Most of the ships in the world are equipped with GNSS receivers. And currently these users take advantage of different augmentation systems such as DGNSS or SBAS/EGNOS, as they provide an adequate answer, especially in terms of accuracy and integrity. To take advantage of this improved accuracy, direct access to EGNOS in vessels can be achieved through EGNOS-enabled navigation receivers and EGNOS-enabled AIS transponders. Therefore, the natural question is: Are those GNSS receivers SBAS (EGNOS) enabled? In most cases they are; SBAS is being used. This paper provides an analysis of the number of onboard devices, mainly devoted to navigation purposes and AIS transponders, which are SBAS compatible.

18

Regulacja położenia silnika prądu stałego z wykorzystaniem regulatorów niecałkowitego rzędu

63%

Ruszewski A. , Sobolewski A.

Pomiary Automatyka Robotyka

|

2012

|

tom R. 16, nr 2

307-311

PL

W pracy rozpatrzono problem regulacji położenia wału silnika prądu stałego o napięciu znamionowym 24 V, obciążonego kołem zamachowym. Do sterowania wykorzystano regulator PD ułamkowego rzędu, zaimplementowany w urządzeniu National Instruments NI ELVIS II programowanym w środowisku LabView. Wykorzystując klasyczną metodę podziału D, podano prostą analityczno-komputerową metodę wyznaczania obszarów stabilności na płaszczyźnie parametrów rozpatrywanego regulatora. Znajomość tych obszarów pozwala na proste obliczenie nastaw regulatora, przy zapewnieniu określonego zapasu stabilności fazy układu regulacji.

EN

The paper presents the problem of position control of DC motor with rated voltage 24 V loaded by flywheel. The fractional order PD controller implemented in National Instruments NI ELVIS II programmed in LabView is used for controlling. Using the D-partition method simple method for determining stability regions in the controller parameters space is given. Knowledge of these regions permits tuning of the controller and ensures required the phase margin of the system.

19

Badania nad wytwarzaniem mikroemulsji woskowych w reaktorze ciśnieniowym

63%

Syrek H. , Antosz A. , Pirowski A. , Kaczor T.

Nafta-Gaz

|

2012

|

tom R. 68, nr 12

1147--1154

PL

W artykule przedstawiono wyniki badań nad wytwarzaniem emulsji woskowych na bazie wosków syntetycznych – nisko- i wysokotopliwych – metodą ciśnieniową. Opisano również stanowisko badawcze, którego istotnym elementem jest reaktor ciśnieniowy, skonstruowany w INiG. W wyniku przeprowadzonych prób uzyskano stabilne mikroemulsje, zawierające 15% (m/m) wosków polietylenowych polarnych i niepolarnych, o temperaturach kroplenia od 102°C do 116ºC. Dla wytworzonych mikroemulsji przeprowadzono badania właściwości fizykochemicznych i użytkowych.

EN

The article describes the research results of producing wax emulsion based on synthetic, low-melting and high-melting waxes. It also describes the research station, of which an important element is a high pressure reactor, constructed in INiG. As a result of the tests carried ou stable emulsions which contained 15% masses of polar and non-polar polyethylene waxes, with melting temperature ranging from 102 to 116ºC were obtained. Research on the physico-chemicay and performance properties for produced microemulsions were also conducted.

20

A socio-demographic portrait of Central and Eastern European (CEE) journalists: A comparative analysis of the journalistic profession in eight CEE countries using the Worlds of Journalism Study

63%

Vasilendiuc N.

Central European Journal of Communication

|

2017

|

tom 10

|

nr 2 (19)

180-192