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1

Optimal docking problem of UAV at detected moving object

Nabadova Lamiya

Zeszyty Naukowe. Transport / Politechnika Śląska

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2023

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z. 120

205--214

EN

In the article, the problem of detecting a suspicious object in the control by unmanned air vehicle (UAV) and tracking it by reaching and changing its direction in the shortest period of time is explored. To solve this optimal control problem, it is considered that the flight of UAV is described with simple motion equations. In the beginning, known quantities are current coordinates and speed of UAV, equation of motion of detected suspicious object.

2

Molecular docking studies on the phytoconstituents as therapeutic leads against SARS-CoV-2

Tiwari Abhishek, Tiwari Varsha, Verma Navneet, Singh Anita, Kumar Manish, Saini Vipin, Sahoo Biswa Mohan, Kaushik Deepak, Verma Ravinder, Sagadevan Suresh

Polimery

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2022

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Vol. 67, nr 7-8

355---374

EN

Because of the present pandemic researchers are seeking for phytocandidates that can inhibit or stop SARS-CoV-2. The main protease (Mpro) of SARS-CoV-2 and spike glycoprotein (S) are both suppressed by bioactive compounds found in plants that work by docking them together. The Mpro proteins 6LU7 (complex with an inhibitor N3) and 5C3N (space group C2221) were employed in docking research. PyRx and AutoDock Vina software were used as docking engine. 22 identified phytoconstituents were selected from IMPPAT, a manually curated database, on the basis of their antiviral effects. Docking studies showed that phytoconstituents β-amyrin (-8.4 kcal/mol), withaferin A (-8.3 kcal/mol), oleanolic acid (-7.8 kcal/mol), and patentiflorin A (-8.1 kcal/mol) had the best results against 5C3N Mpro protein whereas kuwanon L (-7.1 kcal/mol), β-amyrin (-6.9 kcal/mol), oleanolic acid (-6.8 kcal/mol), cucurbitacin D (-6.5 kcal/mol), and quercetin (-6.5 kcal/mol) against 6LU7 Mpro protein. All the compounds were examined for their ADMET characteristics using SwissDock. Present research reports that the phytoconstituents along with docking score will be helpful for future drug development against Covid-19.

PL

W związku z pandemią prowadzone są badania mające na celu znalezienie fitosubstancji, które mogą hamować lub zatrzymywać rozwój SARS-CoV-2. Działanie głównych białek proteazy (Mpro) SARS-CoV-2 i glikoproteiny kolca (S) jest osłabiane przez związki bioaktywne występujące w roślinach poprzez proces dokowania. Do badań dokujących użyto białka Mpro 6LU7 (kompleks z inhibitorem N3) i 5C3N (grupa przestrzenna C2221). Jako silnik dokujący zastosowano PyRx i AutoDock Vina. Zidentyfikowano 22 fitoskładniki wybrane z bazy danych IMPPAT, z uwzględnieniem ich działania przeciwwirusowego. Najbardziej skuteczne w przypadku białka Mpro 5C3N okazały się fitoskładniki β-amyryna (-8,4 kcal/mol), witaferyna A (-8,3 kcal/mol), kwas oleanolowy (-7,8 kcal/mol) i patentifloryna A (-8,1 kcal/mol), a w przypadku białka Mpro 6LU7 kuwanon L (-7,1 kcal/mol), β-amyryna (-6,9 kcal/mol), kwas oleanolowy (-6,8 kcal/mol), kukurbitacyna D (-6,5 kcal/mol) i kwercetyna (-6,5 kcal/mol). Wszystkie substancje zbadano pod kątem ich właściwości ADMET przy użyciu SwissDock. Wykazano, że fitoskładniki mogą być pomocne w pracach nad lekami przeciwko Covid-19.

3

Analiza działania Morskiej Stacji Referencyjnej w Świnoujściu jako podstawa do stworzenia morskich systemów IDS (Instrument Docking System)

Pietraszkiewicz J., Tycholiz W.

Zeszyty Naukowe Akademii Morskiej w Gdyni

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2018

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nr 107

84--98

PL

W artykule opisano fazy podchodzenia statku do portu ze szczególnym uwzględnieniem problemu wyznaczania pozycji jednostki z dużą dokładnością w czasie rzeczywistym. W tym aspekcie przeprowadzona została analiza systemów pozycjonowania, ich dokładności, dostępności, niezawodności oraz zasięgu działania. W artykule przedstawiono wyniki badań obserwacji dokładności systemu pozycjonowania w Świnoujściu, przeprowadzonych przez zespół NavSim Polska Sp. z o.o. Podkreślając wykorzystanie techniki RTK (Real Time Kinematic), przeprowadzono analizę działania Morskiej Stacji Referencyjnej (MSR) w Świnoujściu. Artykuł prezentuje możliwe praktyczne wykorzystanie technologii GNSS RTK (Global Navigation Satellite Systems) do budowy systemów elektronicznego zobrazowania rzeczywistej sytuacji nawigacyjnej dużej jednostki oraz wdrożenia na wzór systemów lotniczych ILS (Instrument Landing System) lub GBAS (Ground Based Augmentation System) morskich systemów IDS (Instrument Docking System). Przedstawione wnioski uzasadniają przydatność MSR w Świnoujściu oraz stosowanie podobnych systemów w celu zwiększenia bezpieczeństwa podczas wprowadzania statków do portu.

EN

Navigating large vessels in the confined waters (coastal/approach and harbour) is everything but trivial. Due to heavy vessel traffic, vicinity of navigational hazards, limited water depth, rapidly changing navigational circumstances, and tremendous weight of the vessels, navigating, mooring and docking activities are demanding and stressful for the pilots. Stress usually leads to increased tiredness, risk of human error and thus to a larger number of incidents and accidents. Marine pilots are more tired and less effective. In the temperate zones there is an additional factor to be considered: poor visibility. This article presents a practical application of the GNSS RTK technology in the electronic chart and situational awareness system as well as the concept of the Instrument Docking System (IDS) for vessels, which in its purpose and fundamental elements is similar to the Instrument Landing System (ILS) for aircrafts).

4

Generating and modeling of braking curve and the assessment of the quality of automatic stopping of the train

Anuszczyk J., Gocek A., Pacholski K., Dominikowski B.

Transport Problems

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2018

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T. 13, z. 2

13--25

EN

This paper presents the theory about generating the braking curve and the analysis of the influence of the braking controller parameters on the generation of the braking curve of the train. In this paper, computed examples of braking quality developed using generic quality factor are shown, and on the basis of the calculations, weight components of the factor and an additional criterion for assessing the quality of braking were proposed. It has been demonstrated that the developed algorithms can be used to verify the effectiveness of the braking controller and the adjustment of the terms, and the change of these algorithms affects the shape of the generated braking curve of the train. It has been shown that the analysis of a failure of the propulsion car revealed the existence of a safe braking area. The performed statistical analysis confirmed the normal distribution of the scatter of braking results, for which the regression model fitted.

5

Planowanie manewru dokowania manipulatora kosmicznego typu planarne trójwahadło metodą endogenicznej przestrzeni konfiguracyjnej

Ratajczak A., Ratajczak J.

Prace Naukowe Politechniki Warszawskiej. Elektronika

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2018

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z. 196

51--60

PL

W pracy przedstawiono propozycję algorytmu planowania ruchu manipulatora kosmicznego w obecności przeszkód. Wprowadzono matematyczny model dynamiki manipulatora kosmicznego typu planarne trójwahadło, który następnie poddano częściowo linearyzującemu sprzężeniu zwrotnemu. Algorytm planowania ruchu oparty jest na idei endogenicznej przestrzeni konfiguracyjnej. Zadanie planowania ruchu wraz z unikaniem przeszkód zostało rozwiązane przy pomocy algorytmu z priorytetowaniem zadań. Efektywność pracy algorytmu została przedstawiona przy pomocy badań symulacyjnych.

EN

In this paper we propose the motion planning with obstacle avoidance algorithm for space manipulator. The introduced dynamics of planar triple pendlum space manipulator is subjected to the partially feedback linearization. The motion planning algorithm is derived with an endogenous configuration space approach and the obstacle avoidance is included through the prioritarian approach. The efficiency of the presented method is illustrated with simulations.

6

Impact of dock tanks pumping plan on structural loads of a dock and a ship

Rajewski P.

New Trends in Production Engineering

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2018

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Vol. 1, Iss. 1

143--149

EN

Positioning of a ship on a working platform above the waterline in order to repair and modernize the underwater hull parts requires changes from continuous support to point support. And as a result of such, the load of the ship structure is subject to changes as well. In extreme cases, the loads may exceed the allowable loads and cause damage to the hull structure. The paper presents the technical aspects of the ships docking process which may have an impact on safety. It also includes a discussion on procedures that reduce the risk of malfunction and failure.

7

Synthesis, characterization, antibacterial evaluation and molecular docking studies of 2-azetidinone derivatives as novel DNA gyrase inhibitors

Sulthana R. M., Quine S. D.

International Letters of Chemistry, Physics and Astronomy

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2015

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Vol. 47

94--108

EN

Newly designed 2-azetidinone derivatives (4a-e) were synthesized in good yields and characterised by advanced spectroscopic studies. The title compounds were evaluated for qualitative (zone of inhibition) by agar diffusion method against Staphylococcus aureus, Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa and Streptococcus pyogenes. Some of the analogues were found to have comparable or even more potency than the standard drugs. Docking study was performed to check interaction of synthesized compounds with the target DNA gyrase.

8

Evaluating the measurement accuracy of laser distance meters for the purpose of the PNDS system construction

Muczyński B., Terczyński R., Gucma L.

Zeszyty Naukowe / Akademia Morska w Szczecinie

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2012

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nr 32 (104) z. 2

131-136

EN

Preliminary outcome of the tests of laser distance measurement modules being a part of the PNDS system (Pilot Navigation & Docking System) developed within the OPIE project (Operational Programme Innovative Economy) in Maritime University in Szczecin are presented in the article. The tests were carried out in laboratory conditions and the actual conditions which may occur during the system’s operation. The modules of the digital laser distance meters available on civilian market were compared. Statistical analysis comparing the accuracy of the laser distance meters was presented and based on it, their general effectiveness was evaluated making part of the preliminary prototype of the PNDS system.

9

Modelling drug-receptor interactions in an average binding site for NK2

Alagona G., Ghio C., Monti S.

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

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1998

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Vol. 2, No 4

563-581

EN

A tentative procedure applied to the search for a new antagonist of neurokinin A (NKA) is presented. In parallel a tentative 3-D model of the NK2 receptor was created, using bacteriorhodopsin (BRD) as a template. The residue substitutions were performed in BRD to obtain the sequence for NK2R_H and the seven a-helical segments were optimized forcing the a-helical backbone to match the corresponding aligned parts of BRD, while the arrangements of the side chains were model built based on available site-directed mutagenesis studies. Constrained MM and molecular dynamics simulations were carried out H-bonding a low energy conformer of the known drugs to residues in the receptor site, allowing both the receptor site and drugs to relax. The Connolly surface for each ligand allowed to determine an "average" binding site in which all the low energy conformers of known and prospective drugs were docked and classified according to a statistical index. The whole procedure was repeated exploiting the lately published structure of an actual G protein coupled receptor as a better template, thus producing a cavity in the binding site to directly dock the drugs. Corollary validations of the force fields used are also mentioned. In addition intra- and intermolecular interactions suitable to produce more active drugs were evaluated.