bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation of the effectiveness of biological fungicides in various sunflower protection systems
Authors: Lysov A. K. , Naumova N. I. , Morozov D. O. , Bukreev V. V.
Published: December 2024

The effectiveness of sunflower protection against septoria was studied in 3 protection systems: chemical, integrated and biologized. Each system had 2 repetitions, in one of them the soil biological fungicide Sternifag, SP (Trichoderma harzianum, strain VKM F-4099D, 1010 CFU/g) was introduced in autumn. The study was conducted in 2021 and 2022 at the Agrobiotechnology field in the Shebekinsky district of the Belgorod region. Biologics were used in integrated and biologized protection systems. In particular, the biological preparation Alirin-B, Zh was used in the biologized protection system. It has been experimentally established that during the autumn application of the soil biological fungicide Sternifag, SP, in all variants of protection systems, an increase in the efficiency of treatments and sunflower yields was noted. It was also found that the studied biological preparations had a growth-stimulating effect on the vegetative organs of plants, including the root system. An economic assessment of 3 sunflower protection systems showed that the average yield over 2 years was higher in all variants when applying Sternifag, SP. The highest yield was obtained with an integrated protection system of 39.3 c/ha. Due to the high costs of drugs, the profitability in the chemical system was in both replications less than other options – 215 and 286%. In the biologized system, profitability was the highest – 536 and 618%, this was due to the cost of biological drugs, which were 2 times less. Thus, it is recommended to introduce integrated and biologized sunflower protection systems, which will contribute not only to reducing the cost of protective measures, but also to reducing the pesticide burden on agroecosystems and improving the quality of finished products through the use of biological pesticides.
Promising strains of phosphate-mobilizing rhizobacteria resistant to glyphosate and nickel
Authors: Khakimova L. R. , Chubukova O. V. , Akimova E. S. , Vershinina Z. R.
Published: December 2024

A search was carried out for phosphate-soluble rhizobacteria capable of growing in the presence of different concentrations of the herbicide glyphosate and nickel heavy metal ions (Ni2+). Using the Muromtsev medium, the phosphate-mobilizing activity was determined only in 3 out of 20 strains of Rhizobium spp. – with a low solubilization index (IS). On the contrary, all strains of Pseudomonas sp. showed a positive result, and the highest IS was in Pseudomonas sp. OBA 2.4.1 and GOR 4.17. The highest growth activity under stressful conditions was shown by 4 strains of Pseudomonas spp.: OBA 2.4.1, OBA 2.9, 4.17 and STA 3, their growth was noticeably inhibited with an increase in the concentration of glyphosate in the medium to 10.0 mg/ml. The growth activity of Rhizobium spp. strains was characterized as average. When growing on a medium with NiCl2, Pseudomonas strains sp. 65 HM and 67 HM grew to a concentration of 9 mM NiCl2 in the medium, at a concentration of 11 mM, strain 67 HM gave growth in the form of single colonies. These strains were isolated from soil samples taken from sites contaminated with chemical effluents. It is possible that nickel chlorides were already present in such soil in high concentrations exceeding the norm, that is why these strains had such high resistance to nickel ions. Thus, Rhizobium sp. strains did not have the most active PGPR properties, but different strains of Pseudomonas sp. showed high resistance to glyphosate and nickel chloride. Thus, Pseudomonas sp. they demostrated their high ability to adapt to stressful conditions. It is such PGPR bacteria (Plant Growth Promoting Rhizo bacteria) that can be considered as biological agents to increase the efficiency of bioremediation of agricultural soils.
Creation of a Model Line of Tumor Cells with Inducable Expression of Adenoviral E1A to Study Its Antiproliferative and Cytotoxic Properties In Vitro and In Vivo
Authors: Morshneva A. V. , Kozlova A. M. , Gnedina O. O. , Igotti M. V.
Published: December 2024

Over the past decades, gene therapy based on the adenoviral E1A has proven its benefit against a number of tumor diseases, both in animal models and in clinical studies. It has been shown that in addition to its own antiproliferative activity, E1A also has the ability to enhance the cytotoxic effect of some anticancer drugs. The use of E1A in combination therapy can solve a number of problems in clinical oncology, among which the most pressing is the problem of drug-resistance of tumor cells. This work describes the establishment of a cell model based on human colorectal cancer cells HCT116 and cisplatin-resistant HCT116/C cells with doxycycline-inducible expression of adenoviral E1A. We have shown the concentration-dependent and time-dependent dynamics of E1A expression upon doxycycline treatment, and shown the antiproliferative effect of adenoviral E1A in the HCT116-E1A and HCT116/C-E1A cells in vitro in experiments assessing viability in MTT and clonogenic activity tests and in vivo in xenograft mouse models. Thus, as a result of our work, a model was created to explore the antiproliferative and sensitizing properties of E1A in platinum-sensitive and platinum-resistant colorectal cancer cells and to search for new approaches to anticancer therapy both in vitro and in vivo. The resulting cell line is a convenient model for selecting the most promising combinations of cytostatic drugs with E1A-based gene therapy.
EMSA-SELEX-seq method for analysis of binding site sequences in DNA-protein complexes
Authors: Nazarov I. B. , Gordeev M. N. , Kuzmin A. A. , Zilov D. S. , Potapenko E. V. , Tomilin A. N.
Published: December 2024

The BOB1 protein (OBF1, OCA-B) is a transcriptional coactivator of two POU domain proteins — OCT1, expressed in all cells, and lymphoid-specific OCT2. The interaction of BOB1 with OCT1/2 plays an important role in the regulation of immune responses in both physiological and pathological contexts. BOB1 is known to form a ternary complex with OCT1/2 bound to DNA in monomeric and certain dimeric configurations, changing the sequence specificity of the binding. To analyze DNA sequences from these complexes, in this work we proposed the EMSA-SELEX-seq method, based on the separation of OCT/BOB1 complexes of various compositions in a non-denaturing polyacrylamide gel (EMSA) followed by the isolation and amplification of the oligonucleotides that they contain (SELEX). Based on several rounds of the enrichment followed by the NGS sequencing and bioinformatics analysis, the DNA sequences were determined and the relevance of this approach was confirmed. Thus, the proposed EMSA-SELEX-seq method allows the analysis of DNA sequences in DNA-protein complexes with varying dimensions of its protein components.
A Theory of the Evolutionary Role of Hereditary Tumors (carcino-evo-devo): the History and the Current State. Part 1. From General Principles to Hypothesis, and from Hypothesis to New Concept
Authors: Kozlov A. P.
Published: December 2024

The theory of the evolutionary role of hereditary tumors, or carcino-evo-devo theory, may be considered as the next step after A.N. Severtsov theory of phylembryogenesis, the theory of evo-devo, and Susumu Ohno theory of evolution by gene duplication. The carcino-evo-devo theory pretends to be a unifying biological theory, because it unifies within an integrated consideration three main types of biological development – individual, evolutionary and neoplastic development. The carcino-evo-devo theory explains a series of unexplained biological phenomena. In the first place, it explains the mechanisms of progressive evolution and biological complexity increase using the concept of relatively unstable transitory forms and autonomous uncontrolled processes. The theory of the evolutionary role of hereditary tumors has formulated several non-trivial predictions in various fields of biology, which have been confirmed in the lab of the author and in other laboratories. The consequences of the carcino-evo-devo theory have implications in medicine and biotechnology. The first part of the article describes the basic principles from which the main hypothesis followed, the progressive developments of the concept, and the first experimental data in support of non-trivial predictions obtained in the laboratory of the author in the period before 2014, when our monograph “Evolution by Tumor Neofunctionalization” (Kozlov, 2014) has been published.
Settlement and Acclimatization of Sika Deer in the Russian Federation
Authors: Kaledin A. P. , Zhukov D. V. , Beketov S. V. , Fertikov V. I. , Smurov A. V. , Makeeva V. M.
Published: December 2024

The article discusses the issues of conservation, distribution and acclimatization of sika deer on the territory of the Russian Federation, the Central Federal District and of the National Park “State Complex “Zavidovo”. A detailed analysis of the condition of the first range of sika deer in the Primorsky Krai, as well as the history of settlement and dynamics of its population in the Russian Federation. For the regions of the Central Federal District, the results of the cadastral assessment of sika deer resources were calculated, including the average long-term week, the average long-term illumination of the population (animals) per 1000 hectares of characteristic lands and the average long-term cost of resources (million rubles). As an effective model for the acclimatization of sika deer, an experience of its economic use was carried out in the National Park “State сomplex “Zavidovo” (Tver region).
Changes in the Content of microRNA775a and its Role in Post-Transcriptional Regulation of Targeted Genes in Corn Leaves under Hypoxia
Authors: Fedorin D. N. , Khomutova A. E. , Eprintsev A. T.
Published: December 2024

Under the influence of hypoxia in the plant organism, the transcription of genes responsible for adaptation to stress caused by low oxygen levels changes. Changes in metabolic pathways under stress conditions may be regulated by microRNAs. It was found that the content of microRNA775A increases in corn leaves under the influence of hypoxia. The use of the fluorescent probe miR775A-ROX made it possible to establish an increase in the number of RNA-inducing silencing complexes (RISC), formed on the basis of microRNA775A, in maize leaves during the development of hypoxic stress. The results obtained indicate that microRNA775A is involved in the processes of adaptation of the body to hypoxic conditions by regulating the expression of target genes at the post-transcriptional level using the RNA interference mechanism.
The Influence of the Surface Density of Thermally Expanded Graphite Sheets on the Acoustic Wave Transmission
Authors: Muravyeva O. V. , Denisov L. A. , Bogdan O. P. , Blinova A. V.
Published: December 2024

The paper presents the results of experimental and theoretical studies of the influence of the surface density of a thin porous sheet of thermally expanded graphite on the transmission coefficient of the acoustic wave. The possibility of using the theory of thin films to describe the processes of transmission of acoustic waves through porous sheet in the field of low frequencies and small thicknesses has been proven. The influence of the operating frequency on the sensitivity of the transmission coefficient to the surface density of the sheet was assessed.
Improving the Efficiency of Defect Image Identification During Computer Decoding of Digital Radiographic Images of Welded Joints of Hazardous Production Facilities
Authors: Grigorchenko S. A. , Kapustin V. I.
Published: December 2024

This article is devoted to improving the efficiency of flaw image identification during computer decoding of digital radiographic images. The paper studies the problem of segmentation of flaw images. Models of segmentation of flaw images on a radiographic image are studied for both manual and computer decoding. The difference between algorithms for searching and identifying groups, clusters, chains of pores, slag and metal inclusions from manual decoding of images is shown.
Algorithms for the search and identification of flaws for use in digital radiography complexes have been developed and experimentally tested at HSC KARS. The convergence of the results of computer and manual decryption was 0,85.
The influence of desalinization of reservoir rocks on their mechanical and filtration properties using the example of the Chayandinskoye field
Authors: Karev V. I. , Kovalenko Y. F.
Published: December 2024

Using the Independent Triaxial Loading Test System of the Institute for Problems in Mechanics of the Russian Academy of Sciences (TILTS), rock specimens from the core material of the reservoir of the Chayandinskoye oil and gas condensate field were tested in order to experimentally study the effect of desalinization of reservoir rocks on their deformation, strength and filtration characteristics. It has been shown that desalinization sharply increases the permeability of rocks. At the same time, the deformation and strength properties of the studied rocks change towards softening (with the exception of the angle of internal friction), nevertheless remaining quite high. Experiments on physical modeling of the process of reducing pressure at the bottom of a horizontal well using TILTS showed that a slight decrease in the elastic and strength properties of the reservoir rocks of the Chayandinskoye oil and gas condensate field after their desalinization should not affect the stability of the well walls. The results obtained allow us to draw an important practical conclusion that when operating a field at the stage of salt washing out due to water filtration during operation, one should not expect a significant increase in the risks associated with reservoir destruction and increased sand production.
Проблеми поповнення Інвестиційного атласу надрокористувача достовірною інформацією про ресурси металічних та неметалічних корисних копалин
Authors: Vasylenko A. P.
Published: December 2024

Для забезпечення потенційних інвесторів інформацією про існування об’єктів інвестування Державна служба геології та надр України запровадила Інвестиційний атлас надрокористувача, що є одним із елементів загальної урядової політики, яка спрямована на залучення інвесторів, у тому числі й іноземних.Типовий профайл кожного об’єкта, що потрапляє до Інвестиційного атласу, містить загальний опис ділянки, координати, оціночні ресурси, попередню вартість, мінімальні вимоги до програми робіт, а також посилання на паспорт родовища і відповідні звіти про ділянку. При цьому не враховуються дані моніторингу (переоцінки) ресурсного потенціалу металічних та неметалічних корисних копалин, який проводився в останні роки. За результатами цих робіт база даних перспективних та прогнозних ресурсів була суттєво змінена. Багато об’єктів, які не відповідали сучасним екологічним, економічним та технологічним умовам, було знято з обліку. По деяких було відкореговано площі, категорії та обсяги ресурсів.Враховуючи ризики, на які йдуть інвестори при укладанні договору на геологічне вивчення, достовірність геологічної інформації, яка лежить в основі оцінки перспективних ресурсів, має вирішальне значення при ухваленні інвестиційних рішень. Рекомендується при поповненні Інвестиційного атласу даними про об’єкти з визначеними ресурсами брати до уваги не тільки інформацію з геологічних звітів, але і результати їх моніторингу.
Деякі питання локального питного водопостачання населення під час воєнного стану (на прикладі міст України з населенням понад 100 тис. осіб). Частина 1
Authors: Rudenko Yu. F. , Yurkova N. A. , Gural O. V. , Saprykin V. Yu.
Published: December 2024

Представлені результати аналізу та узагальнення геолого-гідрогеологічних і гідрохімічних даних по чотирьох містах України з населенням від 107 тис. осіб (Нікополь) до 370 тис. осіб (Вінниця), які розташовані в межах Українського щита. Визначена забезпеченість їх затвердженими експлуатаційними запасами підземних вод або прогнозними ресурсами. Для локального водопостачання цих міст необхідно залучити від 770 до 2600 м³/добу підземних та поверхневих вод. Надані рекомендації щодо створення розгалуженої системи локального (бюветного) водопостачання на випадок виникнення надзвичайних природних і техногенних подій, зокрема запровадження воєнного стану. Дослідження фінансуються Національною академією наук України. Їх виконання передбачено у 2023–2025 рр.
The new engineering and technological decisions for mine technical reclamation of deep open pits to regenerate mesorelief
Authors: Babii K. V. , Malieiev Ye. V.
Published: December 2024

The proposes new engineering and technological decisions concerning mine technical reclamation of land disturbed as a result of open pit mining. The authors paid attention to solving environmental problems of mining after-effects through formation of mesorelief. The problem is solved by means of the landscape regeneration: artificial development of objects based on the hypsometric features (hills and ravines), and structure (stratigraphic column of sedimentary rocks; aquifer) which were in nature before technogenic human intervention.Both engineering and technological decisions have been analyzed concerning trends, facilities, and implementation of the mine technical reclamation. Study of scientific sources, concerning land reclamation after activities by mining industry, has helped understand that the problem of terrain reclamation is almost ignored in Ukraine; however, significant negative impact is mentioned. Mining enterprises of Kryvyi Rih, where mine technical reclamation takes place, are exemplified.The current trends of artificial intelligence and robotic facilities use for open pit mining has been represented which prompted the development of a new generation of quarry equipment. A new design of a spreader launch ММD-2 on the basis of rotary caterpillar excavator for the ordered rock storing. Use of the spreader launch ММD-2 has been proposed for reclamation activities. Rock distribution schemes as well as throwing parameters during the launcher operation have been demonstrated. Optimum parameters to apply the launcher while rock throwing have been identified depending upon the rock fraction.Technological concepts have been developed concerning mine technical reclamation of deep open pits. Sequence of the deposit development has been proposed as well as the approach to regenerate the mesorelief. The engineering procedure of mine technical reclamation is divided into six main implementation stages. At the last stage, it is proposed to combine the mine technical reclamation technology with an approach of layer-by-layer mine technical and biological land reclamation using the spreader launch ММD-2.
Laser measurements registration algorithm for hull blocks with shipbuilding constraints
Authors: Guan Guan , Lin Yan , Ji Zhuoshang
Published: December 2024

The optimal matching of laser measurements in shipyard with the 3D design model for hull blocks is the key to accurately analyze construction errors and rationally offer modification. The conventional registration algorithms tend to neglect the shipbuilding constraints thus cannot meet the practical shipbuilding demands. To solve the problem, this article presents an advanced matching approach under the actual shipbuilding constraints. Firstly, the initial registration values were obtained by the singular value decomposition (SVD) method. Secondly, according to the accuracy requirement, the error distribution at different directions was determined by weight vectors. Lastly, on the basis of initial registration, an accurate registration that adopted nonlinear multi-objective optimization led to perfect matching by introducing the constraints (e.g. levelness, verticality, flatness and straightness) into the objective function of the computing model. The experimental results proved that the method can obtain the most reasonable matching result satisfying the shipbuilding constraints. It can provide an instructive basis for subsequent assembly.
Nonlinear Models of Ship Roll Damping
Authors: Bass D.W. , Haddara M.R.
Published: December 2024

The paper looks at various forms for the roll damping moment of ships and introduces two techniques to identify the parameters of the various models together with a methodology for their evaluation. The emphasis in the paper is on the possibility of using complete portions of roll decay curvf1s rather than decrement curves derived from the peak values of the decay curve. Also the appropriateness of including angle dependent components in the form of the roll damping moment is discussed.
Design of Small Inland Commercial Vessels
Authors: Bari A. , Chowdhury K.H.
Published: December 2024

Design models for seagoing ships are available in the existing literature but those for small inland commercial vessels are very rare. This paper presents consolidated design models, developed as well as collected and arranged for self-propelled inland cargo vessels and push towed tug barges having capacity upto 850 DWT. Instead of random generation approach the design model is static as they are developed on the basis of regression analyses of data of existing vessels but adequately suitable for computerisation and optimisation. Satisfactory consistency of the designs generated by the models and subsequent finally designed vessels in last four years establishes good predictability of the model.
A Study of the Parametrically Excited Roll Motion of a RoRo-Ship in Following and Heading Waves
Authors: Hua Jianbo
Published: December 2024

In this work computer-simulation has been used to study the behaviour of a RoRo-ship subjected to parametrically excited roll motion in longitudinal waves. The influence of parameters such as ship speed, KG-value. wave amplitude etc. on this kind of roll motion has been investigated.
Wave Energy in Drift Control of Offshore Platform
Authors: Guha S. , Sayer P.G.
Published: December 2024

Precise station keeping of deeper offshore platform is of vital importance both for drilling and production operations. With the gradual expansion of offshore activities towards deeper water and more severe seastates, loads on conventional motion and drift control mechanisms are increasing, resulting in a corresponding increase in operation costs. An oscillating hydrofoil has proved itself to be an efficient converter of wave energy to useful thrust. This simple device has great potential for offshore applications, particularly in controlling wave induced mean horizontal drift forces.
Dynamic Behaviour of a U-Type Tuned Liquid Damper
Authors: Shyu K.L. , Kuo H.C.
Published: December 2024

This paper presents the results of a study on a tuned liquid damper (TLD). The TLD uses air and liquid inside a U-shape tank as the mass of dynamic damper of a structure. By using the Lagrange method, the dynamic equation of motion for the fluid inside the structure with this U-shape tuned liquid damper is derived.

The natural frequency of the U-shape TLD is determined by finding the peak value of displacements of the liquid versus exciting accelerations. Vibration behaviours of the structure with and without U-shape TLD subjected to a simple harmonic excitation are examined in the time domain. Effects of mass ratio (mass of U-shape TLD/mass of structure) on vibration reduction are also studied.
On the Stability and Wave Profile of a Ship in Oblique Waves
Authors: Fang Ming-Chung , Chen Shuan-Yu
Published: December 2024

In the paper, the analyses of the stability and resultant wave profile for a ship advancing in oblique waves are made. A time simulation technique based on the previously well developed strip theory is used to calculate the ship motion and the relative wave elevation along the ship. An Instant Grid-Generation (IGG) technique is also applied to reduce the laborious work for the input preparation. The resultant wave elevation includes not only the incident wave but also the diffraction and radiation waves. To analyze the ship stability in waves, the instantaneous wave profile along the ship is derived. The wave profile prediction is also improved by using a more accurate estimation between the incident wave and hull side. The related hydrodynamic coefficients are treated in the manner of large ship motion, hence it is a nonlinear problem. From the present analysis, it is found that the ship stability in waves indeed differs from that in calm water. The authors regard that the present technique can offer more general ship stability analysis and will be helpful to understand the ship capsizing behavior in waves.
Vortex Lattice Method for a Straight Hydrofoil Near a Free Surface
Authors: Thiart G.D.
Published: December 2024

The paper presents a vortex lattice method for the calculation of lift on a straight hydrofoil of finite span near the free surface of an infinitely deep fluid. The velocity field induced by the vortex lattice satisfies the linearized free surface boundary condition and the radiation condition. Lift calculations are compared with experimental results for a 5.11 aspect ratio hydrofoil of the circular arc type. Two options regarding the path of the trailing vortices are examined, i.e. that the trailing vortices leave the hydrofoil directly from the camber surface or via the trailing edge. It is shown that for moderate effective angles of attack the results are very similar, and that the first option, which is simpler and computationally more efficient than the second, is sufficiently accurate for practical purposes. The method was also used to compute the variation of hydrodynamic characteristics with depth of submergence and Froude number for a flat plate of finite span. Results are presented for aspect ratios of 2, 5 and 10 respectively.
Robust Autopilot Design for Ship Steering in Waves
Authors: Zhang Rongjun , Sun Zhenqi , Xu Hanzhen
Published: December 2024

Nowadays, autopilots have been used widely in ship steering, while the robustness of the autopilots designed on the basis of the adaptive control theory is need to be enhanced. This paper presents a theoretical frame of a robust autopilot using the theory of Variable Structure Systems (VSS). Having computed the wave forces and moments acting on a ship, a Variable Structure Control System (VSCS) is investigated for the autopilot of a ship steering in random sea. A kind of nonlinear switching plane and a modified control law are employed to remove the frequent back-and-forth steering. Simulations show that the proposed simple control system is robust to the modeling errors and changes of environment and speed, so it is worthy to be applied to real ship steering/control.
Time-Domain Motion Computations of Twin- and Mono-Hull Ships in Head Seas
Authors: Ye H.K. , Hsiung C.C.
Published: December 2024

Wave exciting forces on a restrained body with steady forward speed in the time-domain were computed by the authors (1995). As one step further, radiation forces and ship motions in regular waves are computed in the present paper. With impulse response functions, the integral-differential equations of motions are solved in the time-domain. The same method is also applied to compute the radiation forces of a catamaran with forward speed. The results show that the time-domain computation for ship motions is particularly meaningful in the cases where the forward speed effect is considered.

Added mass and damping coefficient of a catamaran with the Lewis-form demi-hull are computed for Froude numbers 0.15 and 0.30. Good agreements with experimental results for heave and pitch motions are obtained. A Wigley hull and a Series 60, CB=0.7 hull are also adopted for the motion computation. The computed results for Froude number 0.20 are compared with experimental results.
Scenarios for the assessment of the collision behavior of ships
Authors: Samuelides M.S. , Tabri K. , Incecik A. , Dimou D.
Published: December 2024

Since the late fifties, when the first nuclear powered merchant ships were designed, collision research has been focused on the establishment of models for the prediction of the damage of the side of a ship involved in a ship–ship collision. Such models have been used to assess the performance of the struck ship in case she is involved in a collision. Further it was and it is still highly desirable to develop design tools which could provide guidance for the construction of ship hulls which will minimize as far as possible the risk in case of a collision. In order to assess the collision behaviour of a ship, there is a need to test her under specific collision incidents, which are described by a number of parameters, such as the particulars of the striking ship including the stiffness of her bow, the speeds and relative orientation of the two vessels, sea conditions, etc. The assessment methodologies are deterministic, i.e. they are based on one or a few severe collision scenarios, or probabilistic, i.e. they consider distribution functions of one or more collision parameters. The paper presents and discusses existing codes concerning collision scenarios for floating and fixed marine structures, presents data that can be used for the determination of the level of the loading that a ship may experience if she is involved in a collision and gives examples of relevant calculations.
Viscous-flow calculations for bare hull DARPA SUBOFF submarine at incidence
Authors: Toxopeus Serge
Published: December 2024

As part of a multi-nation study regarding CFD validation, conducted by the Submarine Hydrodynamics Working Group, viscous-flow calculations on the unappended hull-form of the DARPA SUBOFF sailing straight ahead and at oblique motion were conducted in order to verify the accuracy of the predictions.

The study shows good general agreement with the experiments for local field values as well as for global quantities.
Performance study of podded propulsor in static azimuthing conditions
Authors: Fakhrul Islam Mohammed , Veitch Brian , Akinturk Ayhan , Bose Neil , Liu Pengfei
Published: December 2024

This paper presents a comprehensive experimental study on variations of propulsive characteristics of puller and pusher podded propulsors in static azimuthing open water conditions. A custom designed experimental apparatus consisting of a six-component global dynamometer and a three-component pod dynamometer was used to measure the propulsive performance of a model pod unit in pusher and puller configurations in a towing tank. The pod model was tested to measure the forces on the whole unit as well as thrust and torque of the propeller shaft for a range of advance coefficients combined with a range of static azimuth angles from +30° to −30°. The variations in forces and moments of the propulsor unit with change of azimuth angle and advance speed are presented in non-dimensional forms. The results illustrate that the propeller thrust and torque as well as the unit axial, side forces and the steering moment are complex functions of the azimuth angle and propeller loading.
Analysis of ship propulsion system behaviour and the impact on fuel consumption
Authors: Shi W. , Grimmelius H.T. , Stapersma D.
Published: December 2024

From fuel to ship moving, the overall energy conversion efficiency consists of three parts: the engine efficiency, the transmission efficiency and the propulsive efficiency. In off-design conditions, there are three factors, namely the engine speed, the propeller pitch ratio and the rudder activity, and an additional disturbance, ship loading factor that can impact the behaviour of ship propulsion system and influence the overall energy conversion efficiency. In this study, by means of computer simulation, four elementary types of off-design conditions, each of which is relevant to one of the impact factors, and entire voyage simulations which combines the off-design and design operation conditions, are investigated to reveal the behaviour of the ship propulsion system. The results demonstrate that, in terms of fuel consumption, the power specific fuel consumption is mainly determined by engine efficiency while ship speed plays the most important role in calculation of ton-mile specific fuel consumption. On the voyage basis, high percentage of manoeuvering stage and intensive rudder activity result in large ton-mile specific fuel consumption, while low cruising speed could improve the fuel economy on ton-mile basis.
A study of hydrodynamics of planing flat catamaran and prismatic hulls
Authors: Xie Nan , Vassalos Dracos
Published: December 2024

A numerical investigation of hydrodynamic force and pressure distribution for planing hull has been carried out. The problem is solved by using a pressure patch distribution method. The method is based on potential flow theory and with a linearised free surface boundary condition. In some of the previous studies, it was found that the inversed pressure distribution on the planing hull will be oscillating, i.e., a numerical instability problem occurred. In the present study, a robust numerical approach was adopted to calculate the elementary solution of a pressure patch moving on the free surface. The numerical approach is applied to flat plate, flat plate catamaran and prismatic planing hulls. No numerical instability has been found for the predicted pressure distribution on the planing hulls. The predicted results are compared with those of other published numerical calculations and model tests, a fairly good agreement has been found.
Penggunaan Metode Artificial Neural Network dalam Pembuatan Peta Kerentanan Longsor Wilayah Kabupaten Karanganyar
Authors: Salwa Atilla , Dananjaya Raden Harya , Surjandari Niken Silmi
Published: December 2024

Tanah longsor menjadi bencana alam yang marak terjadi di Indonesia. Selama sepuluh tahun terakhir terdapat 2975 kejadian tanah longsor yang terjadi di Jawa Tengah, di mana 101 kejadian tanah longsor berada di Kabupaten Karanganyar. Penelitian ini bertujuan untuk membuat peta kerentanan longsor pada wilayah Kabupaten Karanganyar. Peta kerentanan akan dibagi menjadi lima kelas, yaitu sangat rendah, rendah, sedang, tinggi dan sangat tinggi dengan menggunakan metode natural breaks (jenk’s). Penelitian ini menggunakan 9 faktor pengondisi longsor yaitu jarak terhadap jalan sekunder, jarak terhadap jalan tersier, slope, topographic wetness index (TWI), elevasi, tata guna lahan (landuse), litologi, normalized difference vegetation index (NDVI), dan hujan. Pembuatan peta dilakukan dengan menggunakan Artificial Neural Network dengan bantuan modul scikit learn dan metode ten-folds cross validation digunakan sebagai metode validasi model yang dihasilkan. Nilai landslide density dihitung pada penelitian ini untuk evaluasi performa dari hasil klasifikasi kerentanan longsor. Parameter machine learning yang digunakan pada penelitian ini adalah hidden layer sizes, activation, maximum iteration dan random state. Performa model Artificial Neural Network yang dihasilkan menggunakan parameter tersebut menunjukkan hasil yang excellent.  Nilai AUC yang didapat pada penelitian ini sebesar 0,9140 dengan nilai ten-folds cross validation 0,7444.
Analisis Penentuan Parameter Gempa Untuk Perhitungan Stabilitas Bendungan
Authors: Hidayawan Ahmad , Kurniawan Andri , Adhi Bagas Wahyu , Setiyanto Beni , Rahayu Hayu
Published: December 2024

Dams have an important role in controlling floods and providing water supply for infrastructure and community needs. The construction of the Pidekso Dam, as part of government efforts, requires research to determine earthquake parameters to ensure the safety of its structure. Pidekso Dam, located in the downstream Bengawan Solo river, is prone to earthquakes because it is adjacent to areas where earthquakes often occur. This study aims to determine the parameters of the earthquake coefficient Operating Basis Earthquakeee (OBE) and MaximumaDesignaEarthquakee (MDE) based on the 2017 earthquake map of Indonesia. Analysis was conducted to assess the risk of dam collapse due to earthquakes. Based on the dam risk class criteria, Pidekso Dam has a high risk class with a total weight of 30. For OBE earthquake analysis, the earthquake coefficient used ranges from 0.1 to 0.15 g, with a probability of being exceeded by 2% in 100 years. As for MDE earthquakes, the earthquake coefficient ranges from 0.5 to 0.6 g, with a repeat period T = 5000 years.
Paschal Annals: What Was That?
Authors:   Institute of World History of the Russian Academy of Sciences, Sidorov Alexander I.
Published: December 2024

What were paschal annals, a kind of texts well-known for a long time but yet not easy for understanding? When and why did they appear? What was they function? What can their codicological context tell us about those texts? How did they evolution? Can one define their genre? Paschal annals are a historiographical construction of the 19th century which later was voluntary integrated into a scheme of development of medieval annalistic writing. How-ever, manuscript material shows that, up to the 10th century, notes in Easter tables were connected not with historical writing but with computus. They were a tool of formation and visualization of the perception of linear Christian time. After the year 1000, paschal annals gradually change they nature: they distance themselves from computus and become a part of chronicle writing in a strict sense. This follows not only from the content of the historical notes, but also from the types of Easter tables used for the annals as well as from their new codicological context.
Architecting Enterprise-Scale Data Products: A Framework for Advanced Data Science and AI/ML Operations
Authors: Seshendranath Balla Venkata
Published: December 2024

This article presents a comprehensive framework for building enterprise-scale data products that power modern Customer & Product Analytics, Data Science, artificial intelligence, and machine learning initiatives. The article examines the foundational architecture patterns, pipeline engineering strategies, and advanced distributed computing approaches in both on-prem and cloud. These are essential for developing robust data infrastructure capable of handling complex Data Analytics, Data Science, and AI/ML workflows. The article explores critical aspects of feature engineering at scale, real-time processing capabilities, and the implementation of feature stores, while addressing the challenges of data quality, governance, legal, and security in regulated environments. The article introduces a systematic approach to integrating data products with MLOps pipelines, emphasizing the importance of automated workflows, monitoring systems, and feedback loops in production environments. The findings demonstrate that successful implementation of scalable data products requires a careful balance of architectural decisions, technology selection, and operational practices. The article contributes to the field by providing actionable insights and architectural patterns that organizations can adopt to build resilient, scalable, and efficient data products for their Data Analytics, Data Science, and AI/ML use cases. This article establishes a foundational framework that bridges the gap between theoretical data architecture principles and practical implementation challenges in enterprise settings.
Recent Advances and Innovations in SAP S/4HANA Cloud and SAP BTP and SAP AI: Integration Strategies and Latest Developments
Authors: Sravan Kumar Nendrambaka
Published: December 2024

This article presents a comprehensive analysis of recent advancements and integration strategies in SAP S/4HANA Cloud and SAP Business Technology Platform (BTP), examining their combined impact on enterprise digital transformation. The article explores the architectural evolution of these platforms, focusing on their core components, integration frameworks, and deployment flexibility across on-premises, cloud, and hybrid environments. Through detailed examination of industry-specific implementations in retail, healthcare, and manufacturing sectors, the article demonstrates how organizations leverage these platforms to achieve operational excellence and innovation. The article investigates the technical infrastructure of SAP BTP, including its Platform-as-a-Service capabilities, development environments, and artificial intelligence integration, while evaluating the business intelligence and analytics capabilities that enable real-time decision-making. Special attention is given to the commercial models and economic implications of adopting these technologies, including consumption-based and subscription pricing strategies. The article concludes by identifying emerging trends and future developments, providing valuable insights for organizations planning or executing their digital transformation initiatives. This comprehensive article analysis reveals how the integration of SAP S/4HANA Cloud and BTP creates a robust foundation for enterprise innovation, while highlighting critical considerations for successful implementation and adoption.
Equality in Indonesian higher education for international students
Authors: Hastowohadi Hastowohadi , Sayid Ma’rifatulloh
Published: December 2024

This study aims to underpin equality issues of international students learning in Indonesian higher education institutions by engaging with this issue and identifying how international students in Indonesia reshape their learning trajectory by providing quality and equitable education for international students. We implemented a narrative inquiry research design; we interviewed six international students from various backgrounds of the study to determine the institutional equality perception of their learning surroundings. By using emotional geography and language appraisal, we undergo the analysis to dig out their experiences and passionate encounters when they studied in Indonesia. The recommendations of the findings will be beneficial in improving Indonesian university quality from social and cultural facets, as well as the institutional system. In short, embracing diversity, equity, and inclusiveness to engage international students’ participation and capacity is pivotal in reshaping their identity.
SYSTEMATIZATION OF FACTORS INFLUENCING THE SUSTAINABLE DEVELOPMENT OF ENTERPRISES
Authors: Kovtun Oksana
Published: December 2024

One of the main, essential features of the modern global economy is the acceleration of its development and the acceleration of fundamental complex transformations (related to changes in the technological structure, globalization, digitalization, intellectualization, virtualization, and informatization). In this situation, the problem of taking into account the factors influencing all aspects of the enterprise's activities becomes critically important. This substantiates the relevance of this study. The purpose of the article is to systematize the factors influencing the sustainable development of enterprises. Research methods: generalization, systematization. The article further develops the systematization of factors of sustainable development of enterprises in Ukraine, which are proposed to be divided "by place of origin" (exogenous and endogenous) and "by areas of origin" (economic, financial, socio-political, environmental, technical, organizational, scientific, demographic, marketing, innovation, communication, force majeure), which will allow enterprises to define them more precisely (according to the specifics of their own activities). The factors influencing the sustainable development of enterprises in the current economic environment are specified. Subsequently, the systematized factors, combined with the results of the analysis of the enterprise's potential, can form the basis for a professional justification of the directions of its economic activity and sustainable development strategy.
PENDEKATAN PENDIDIKAN MODEL EKSISTESIALISME MARTIN HEIDEGGER DALAM MENGHADAPI TANTANGAN PENDIDIKAN AGAMA ISLAM DI ERA MODERN
Authors: Izzah Zulfa Nailul , Usman Usman
Published: December 2024

Artikel ini membahas penerapan pendekatan eksistensialisme Martin Heidegger dalam Pendidikan Agama Islam (PAI) untuk menghadapi tantangan di era modern. Berlandaskan pemikiran Heidegger tentang “Dasein” atau keberadaan manusia, eksistensialisme menekankan pentingnya kebebasan individu, tanggung jawab, dan pencarian makna hidup yang otentik. Dalam konteks PAI, prinsip-prinsip ini relevan untuk mengembangkan karakter peserta didik yang berlandaskan nilai-nilai Islam. Pendekatan ini mampu menanggapi krisis identitas dan dampak sekularisasi yang mengancam generasi muda. Melalui kajian pustaka, penelitian ini menganalisis relevansi eksistensialisme dalam memperkaya metodologi PAI, khususnya melalui pembelajaran reflektif dan pengalaman. Implikasi praktis yang diusulkan mencakup peran guru sebagai fasilitator, pembelajaran berbasis refleksi, serta pengembangan kesadaran diri peserta didik sebagai individu yang unik. Pendekatan ini diharapkan dapat memperdalam pemahaman spiritual dan membantu peserta didik menemukan tujuan hidup yang selaras dengan ajaran Islam.
Development of a functional system for diagnosing the presence of rotor damage in induction traction motors
Authors: Lakusta Denys , Maliuk Sergey
Published: December 2024

The aim of this work is to develop a system for functional diagnostics of rotor bar breakage in induction traction motors of railway rolling stock. In order to achieve this aim, the following tasks have been solved: developed an algorithm for diagnosing the condition of rotor bars based on the statistics of fractional moments; developed a block diagram of the unit for diagnosing the condition of rotor bars of the induction motor based on the statistics of fractional moments; developed a block diagram of the system for functional diagnosis of rotor bars condition as part of the traction motor with direct torque control. The most important result consists in obtaining a mathematical model of fractional moment statistics with less volume of calculations and improved sensitivity of the method. This result was achieved by determining the information-frequency range, which made it possible to analyze not all the spectral components of the analyzed signal, but only that part of it where there may be spectral components typical for the breakage of rotor bars of the induction motor. This approach to diagnosing the condition of rotor bars can also be applied in traction motors of rolling stock with vector control system of induction motors.
Comparative assessment of resonant frequencies of the floor of suburban electric train cars
Authors: Holovashchenko Oleh , Kara Serhii , Tkachenko Victor
Published: December 2024

The work is devoted to the study of the resonant frequency characteristics of the floor of passenger cars for the modernization of suburban electric trains of the EPL2, EPL9 series. A horizontal vibrator loading scheme was adopted for the experiments. The aim of the study is an experimental comparative assessment of the resonant frequencies of the floor of cars with different variants of the structural structure. An experimental and computational method for determining the resonant frequency of the oscillatory system based on limited experimental data, namely the excitation frequency and the measured coefficient of reduction of the force amplitude, is proposed. Based on the tests, the frequency characteristics of the relative change in the amplitude of accelerations on the surface of the floor of different structures were obtained. The relative amplitudes are presented in the form of the amplitude growth coefficient k. It is found that the floor amplitude growth coefficient does not depend on the excitation amplitude and depends only on the frequency. The frequency characteristics of the floor design options with rubber shock absorbers differ significantly from the basic version in terms of resonant frequency – 104 Hz versus 69–75 Hz. The introduction of layers of the vibration damping membrane into the design scheme has a minor effect on the resonant frequency of the floor: 75–71–69 Hz.