Marine Technical College

Mazkur maqolada Farg‘ona viloyati dala sharoitida karam (Brassica L.) ekinlarida keng tarqalgan ildiz bo‘rtma nematodalari - Meloidogyne hapla ga qarshi oksamil (oxamyl) nematitsid preparatining biologik samaradorligi o‘rganildi. Tadqiqotlar 2025 yil vegetatsiya davrida bo‘rtma nematodalar bilan zararlangan ochiq dala maydonlarida o‘tkazilib, tajribalar karamning “Burbon F1” navida olib borildi. Oksamil preparati 55, 65 va 75 ml/m² sarf-meyorlarida uch variantda qo‘llanildi. Preparatning samaradorligi Abbott formulasi asosida baholandi hamda tuproqdagi invazion lichinkalar soni va ildizlarning zararlanish darajasi aniqlandi. Tadqiqot natijalariga ko‘ra, preparatning 75 ml/m² sarf-meyorida qo‘llanilishi vegetatsiya oxirida tuproqdagi nematoda lichinkalari sonining sezilarli kamayishiga olib kelib, biologik samaradorlik 88,5 % ni tashkil etdi. Ushbu variantda ildizlarning zararlanish darajasi nazoratga nisbatan keskin kamaygani aniqlandi. Olingan natijalar oksamil preparatini bo‘rtma nematodalar bilan kuchli zararlangan tuproqlarda karam ekinini himoya qilishda samarali vosita sifatida tavsiya etish imkonini beradi

In relativistic plasma expansion, a relative motion of plasma components causes absorption of spectral lines to be Doppler-shifted with respect to the emission line centers. The shift of spectral line can be of an order or exceeding the natural linewidth, leading to a significant reduction in self-absorption and optical thickness of the plasma. In this paper we experimentally examine the effect of femtosecond relativistic laser plasma expanding from both sides of the solid foil target. In an experiment, a hot plasma x-ray source in a 1–2 μm thin 4-chlorostyrene foil was created by high-contrast ∼ 1 × 1021 W/cm2 pulses delivered by the J-KAREN-P facility. In addition, the rear side of the target was heated by 1/100 of the main pulse power with a controlled few-nanosecond time delay. It is demonstrated that the high velocity of the downstream and upstream (from the rear side) plasma expansion essentially induces plasma transparency for K-shell emission from He-like chlorine ions dominating the ion charge distribution.

Piles are deep foundation elements that play a crucial role in supporting substantial structural loads, particularly in the construction of heavily loaded port structures and bridges. Pile driving involves the installation of piles into the shoreline and/or seabed. These piles can be composed of different materials, including wood, concrete, steel, or a combination thereof. This article aims to provide an overview of pile driving fundamentals, highlight the common issues faced during the pile driving process, and potential solutions to address these challenges. The typical problems encountered in the advancement of displacement piles on large-scale marine projects are considered to include overrunning of piles, driving piles out of alignment, failing to account for obstructions, unexpected soil conditions, pile damage, lateral movement in adjacent piles, pile handling, and pile driving analysis issues. During pile installation, it is not uncommon to observe substantial differences between the field measurements obtained using a pile dynamic analyzer (PDA) and the axial capacity predicted by a GRLWEAP analysis. These discrepancies often arise when incorrect parameters are employed in the analysis. It is crucial to meticulously evaluate factors such as pile type, axial capacity, and site conditions during the design phase. Additionally, this article underscores the utmost significance of conducting a thorough soil investigation, including an understanding of the site’s geology and development history. If necessary, conducting an indicative test pile program also helps to ensure the success of pile foundation design and construction.

Introduction. The paper deals with the philosophical problems of the modern dialogue between cosmology and theology. It is argued that no existential contradiction is possible between them as originating in one and the same human condition. The difference between cosmology and theology amounts to the difference in their open-ended hermeneutics of the outer world. It is from within this philosophical conclusion that the hot issue of the dialogue are discussed and some insights are proposed.Methodology and sources. The philosophical analysis is based on the discussion of epistemological issues in modern cosmology and their relevance to theological view of the world. The method is similar to existential phenomenology’s approach to the constitution of the notion of the universe in cosmology and theology as an open-ended hermeneutics of the world.Results and discussion. It is shown that no existential contradiction is possible between two types of hermeneutics as originating in one and the same human condition. It is human being that becomes the major theme of the dialogue between cosmology and theology.On the basis of the conclusions made the paper discusses some “hot” issues in the contemporary cosmology-theology discussion, including: 1) The inseparability of cosmology and theology in justification of the possibility of cosmological knowledge, 2) Fine-tuning, Anthropic principle, fitness of the universe for life, 3) The unknowability of the universe and apophaticism in cosmology, 4) Multiple universes and their ontology, 5) How much of life is in the universe: the Search for Extraterrestrial Intelligence (SETI), exoplanets and theological consequence for multiple incarnations, 6) The origin of the universe in modern scientific cosmology and its relevance to the theologically understood creatio ex nihilo, 7) Consciousness and the universe: can cosmology account for its own possibility without appealing to the theologically understood human capacity in producing an intellectual synthesis of the universe.Conclusion. On the basis of the methods applied to the hot issues in the dialogue between cosmology and theology one concludes that the dialogue between cosmology and theology is an open-ended enterprise related to the fundamentally concealed origins of humanity and universe. The difference is hermeneutics of the universe does not create any contradiction or tension but reflects a dualistic position of humanity in the universe, being an insignificant part of it and at the same time its center of disclosure and manifestation.

Instrumental mass fractionation of Mg-isotopes and the relative sensitivity factor (RSF) for 27Al/24Mg ratios for in situ analysis by secondary ion mass spectrometry were investigated for minerals in Ca-Al-rich inclusions (CAIs) of meteorites, to verify systematic errors in Al-Mg chronological systematics of CAIs. We synthesized seventeen glasses with different chemical compositions that imitate those for CAI minerals and measured their Al-Mg isotopic compositions. In particular, the variation range of RSFs for six melilite glasses almost covering chemical compositions of CAI melilite is 2.0 ± 0.3%, indicating that systematic error for 27Al/24Mg for melilite is less than 2.0 ± 0.3% and likely corresponds to that of an 26Al-26Mg relative age of ∼0.01 Myr for melilite-rich CAIs. Our data strongly support the robustness of variations in initial 26Al/27Al ratios among CAIs, corresponding to a formation age spread of ∼0.4 Myr at the very beginning of the Solar System formation.

Amine and membrane based process are commonly used to treat acid gases such as carbon dioxide and hydrogen sulfide. Carbon dioxide adversely affect the environment therefore, its utilization and storage are critical. In this work, a simplistic approach of single stage membrane unit combine with amine absorption processes with different commercial amines were investigated. Increase in CO2 concentration in the feed gas, results in substantial increase in the thermal energy consumption of the stripper reboiler, where using hybrid amine-membrane setup can effectively reduce energy consumed in reboiler. Both amine absorption process and membrane process are simulated using Aspen HYSYS V10. Since, membrane is not available in Aspen HYSYS V10 unit operation package, it is programmed and added as custom user operation. Moreover, a new acid/ amine based fluid package builds in combination of Peng-Robinson equation of state for vapor phase and electrolyte non-random two liquid based activity model for liquid phase were used in this study. Furthermore, energy consumption in CO2 capture using different alkanolamine such as N-methyldiethanolamine (MDEA), monethanolamine (MEA), deithanolamine (DEA), piperazine (PZ), triethanolamine (TEA) are also studied. As membrane unit help in CO2 reduction in feed to amine absorption process in hybrid amine-membrane setup. This significantly reduces the energy requirement as compared to the conventional standalone alkanolamine process. In comparison with various amines used in amine absorption process, MEA offers the lowest total energy consumed, whereas, MDEA considered to be the highest in terms of energy consumption.

Nowadays, with the increasing cost of shipping and fuel oil, more and more countries pay attention to the energy saving and emission reduction of marine main diesel engine. The application of marine intelligent diesel engine is more and more extensive. This paper studies the common rail fuel system of intelligent diesel engine represented by RT-flex, and analyses the comparison between marine traditional diesel engine and marine intelligent diesel engine, Simultaneous analysis the advantages of intelligent diesel engine. Based on the characteristics of electronic control common rail of RT-flex diesel engine, the structure and principle of fuel common rail and servo common rail are analyzed. On this basis, the intelligent diesel engine control system is mainly studied. At the same time, the application of flex View software of control system is also studied.