bluuebunny/crossref_metadata_2025 huggingface dataset:
Improving the energy efficiency of a solar air heater with heat accumulator using flat reflectors
Authors: Toshmamatov Bobir , Shomuratova Sokhiba , Safarova Setora
Published: August 2023

In the article, the authors researched the process of increasing the energy efficiency of the solar air heating collector with heat accumulator. In order to increase the energy efficiency of the solar air heating collector with a heat accumulator, it was proposed to install flat reflectors parallel to its sides. Flat reflectors with a surface area of 1.8 m2 were installed on the sides of the solar air heating collector with a useful surface of 1.8 m2, and a pilot-industrial version of the device was created. According to the results of the conducted research, it was determined that the energy efficiency of flat reflectors depends on the solar declination angle. Research results show that, the maximum heat capacity of the flat reflector solar air heating collector with a heat accumulator was 1020 W. The maximum temperature of the heat carriers, air + 75°C and heat accumulator + 85°C.
Processing of the catalyst used in reforming natural gas
Authors: Farmanov Behzod , Tavashov Shakhzod
Published: August 2023

Today, in the world industry, special attention is paid to the synthesis of high-strength, low hydraulic resistance, improved geometry and increased specific surface area of catalyst granules. In this aspect an important task is to develop a technology for the production of our own highly efficient and durable catalysts based on the processing of spent industrial catalysts. To do this, it is necessary to substantiate a number scientific solutions, including in the following areas: development of technology for extracting nickel from spent industrial catalysts of the GIAP-8 series, technology for producing high-strength alumina carriers and scientific basis for obtaining a nickel-containing catalyst on a carrier of aluminum oxide.
Mathematical modeling of ethylene oxidative acetylation process
Authors: Buronov F E , Fayzullaev N I
Published: August 2023

In the article, the kinetic laws, kinetics, and mechanism of the oxidative acetylation reaction of ethylene in the vapor phase were studied in detail in the 0.4%Rd+4%Cu+7%CH3 COOK/YuKTs catalyst. As a result of the research, the following optimal conditions for the reaction were selected: in the middle zone of the reactor at a temperature of 165°C, a volume velocity of 2000 h-1, a pressure of 4 atm, a ratio of ethylene to acetic acid of 4:1 and an oxygen content of 7% by volume. Under these optimal conditions, the activation energies of the reactions of vinyl acetate formation and ethylene oxidation are respectively equal to: Ea(VA) = 8.17 kcal/(mol∙K) and Ea(SO2) = 19.61 kcal/(mol∙ K). It was found that the rate of oxidation of ethylene is higher than the rate of formation of vinyl acetate when the temperature exceeds 220°C. The reaction mechanism of vinylacetate formation from ethylene and acetic acid in the presence of a palladium catalyst was proposed.
Ecosystem of sectoral management as a tool for implementing state energy policy (experience of oil companies)
Authors: Rodnyansky Dmitry , Palei Tatyana , Makarov Ivan , Selishchev Oleg , Bizin Sergey
Published: August 2023

In this paper, the author’s approach to the definition of the concept of an ecosystem of sectoral management is proposed, the possibility of introducing this concept into the system of state regulation of oil companies and the industry as a whole is considered. The article describes the main indicators included in the process-project model of sectoral management, which is the center of the concept of the sectoral management ecosystem, provides a methodology for calculating and monitoring these indicators, and analyzes the benefits of implementing this concept in the state regulation system.
Comparative analysis of traditional power supply and operation of solar panels in protected ground systems
Authors: Antonov M A , Kaun O Y , Yurov A A , Galstyan R A , Abramov Y V
Published: August 2023

This article discusses the issues of autonomous power supply of the greenhouse. The types of greenhouses and their main microclimate parameters are considered. The article calculates the payback of installing solar panels on a greenhouse and the usual power supply of a greenhouse, depending on its type. As a result, it was revealed that the installation of solar panels has advantageous advantages in comparison with traditional mains power
Analysis of approaches to assessing the actual condition, residual life and reliability of hydraulic turbines
Authors: Baydakova N V , Afonin A V , Zhelyaskova O I , Blagochinnov A V , Kovalenko A I , Danilov S A
Published: August 2023

In order to increase the resource and reliability of power equipment, reduce downtime and repair costs, modern methods of monitoring and resource diagnostics are used to build an equipment maintenance system based on the actual technical condition of the equipment. The main content of the work performed with different prevention strategies is considered. The current situation with the wear of the main power equipment in the country and the results of research indicate the need to create and develop more advanced methods for assessing the resource of power equipment both in hydropower and in the energy sector as a whole.
The offshore deposits indicators substances and their spatial distribution modelling
Authors: Pozdniakova V V , Kustikova M A
Published: August 2023

The study of marine areas in order to replenish the raw material base with additional sources is an increasingly relevant task. The modern geological exploration equipment development for the offshore deposits search requires a further study of both the deposits features and the seawater characteristics. According to the results of the existing offshore deposits analyzed data, it was revealed that the deposits are characterized by an increased content of hydrocarbon gas bubbles on the surface of the water, as well as an increased content of these substances in the waters themselves. The main indicator substances were determined to be water-soluble methane, propane, ethane and butane. In addition, the paper presents the results of the vertical distribution of these substances modeling over marine deposits.
Comparative analysis of film boiling correlations for steam explosion problem
Authors: Melikhov Vladimir , Melikhov Oleg , Yakush Sergey , Konovalov Oleg
Published: August 2023

The article considers the existing models and correlations for describing heat transfer during film boiling. Film boiling is an important thermophysical process that determines the course of interaction of the melt of reactor core materials with the coolant, which can potentially occur during a severe accident at a nuclear power plant with a pressurized water-cooled reactor (VVER/PWR). The values of the Nusselt number predicted by these models are compared. A fairly significant dispersion of calculated parameters has been established, making it difficult to unambiguously choose one or another correlation. However, in the range of parameters typical for the interaction of a high-temperature melt of reactor core materials with a coolant, several correlations give quite close values, which allows them to be recommended for use in calculation codes for modeling thermal-hydraulic processes during a severe accident at a nuclear power plant with VVER/PWR type.
Implementation of poultry waste disposal technology for energy and fertilizer production
Authors: Fakhreev N N , Ziganshin B G , Ivanov B L , Gayfullin I Kh , Nafikov I R
Published: August 2023

The developed unit, which implements the technology of separation of raw materials into useful components by thermal destruction, makes it possible to obtain fuel synthesis gas, in which carbon monoxide (CO) and hydrogen (H2) predominate, suitable for use in internal combustion generators for generating electrical energy, as well as saturated ash potassium (K) and phosphorus (P) suitable as a fertilizer in agriculture.
LED Continuous Lighting Reduces Nitrate Content in Brassicaceae Microgreens
Authors: Rubaeva Alexandra A , Sherudilo Elena G , Shibaeva Tatjana G
Published: August 2023

The study was carried out to assess whether continuous lighting (CL) can be used to reduce nitrate content in Brassicaceae microgreens. Arugula (Eruca vesicaria subsp. sativa), broccoli (Brassica oleracea var. italic), mizuna (Brassica rapa var. nipposinica) and radish (Raphanus sativus var. radicula) seedlings were grown in the controlled climate chambers under 16 h or 24 h photoperiod provided by light-emitting diode (LED) or fluorescent (FLU) lamps. At the pre-harvest stage, half of microgreens were treated by CL for 3 days. The results show that nitrogen content was decreased significantly in plants grown under LED CL compared to plants grown under 16 h photoperiod. The highest decrease (by 40 %) was observed in arugula microgreens. In contrast, CL provided by FLU lamps had little effect (decrease by 11 and 6 %) on nitrate content in mizuna and broccoli and no effect in arugula and radish. Pre-harvest treatment by CL resulted in significant decrease of nitrate content in all four plant species. In conclusion, continuous LED lighting applied during microgreen cultivation or at the pre-harvest stage effectively reduces nitrate content in Brassicaceae microgreens.
Estimation of the level of eutrophication of coastal waters of the Baltic Sea on the basis of Earth remote sensing data
Authors: Rada Artem , Nikitina Oksana , Syrova Marina
Published: August 2023

One of the serious environmental problems is the eutrophication of water bodies, so monitoring of this process is necessary. The purpose of the study is to assess the level of eutrophication of coastal waters based on the analysis of satellite imagery data using NDVI. The NDVI value and the water area where NDVI is greater than zero were used as indicators of eutrophication. The study was carried out in the Gdansk and Kaliningrad bays of the Baltic Sea. Computer processing of images in .tif (NDVI) and .png (RGB images) formats from satellites of the Sentinel-2 and Landsat family for 2013-2021 was performed. As a result of the study, it was found that the calculation of the NVDI index and the area where this index is greater than zero is an adequate method for monitoring eutrophication, since it demonstrates areas of the water area where a high level of vegetation is observed. Compared to the calculation of chlorophyll content indices (which are very difficult to establish standard values), the calculation of NDVI is easier to interpret. The study shows that the level of eutrophication in the bays of the Baltic Sea depends on seasonality, it usually increases from May to August, and decreases in September. Annual fluctuations are also observed, in particular, a decrease in eutrophication in 2020-2021 due to the decline in economic activity and anthropogenic pollution. Sharp and rapid increases in the level of eutrophication were found, but in the study period, the ecosystems of the bays were capable of self-healing.
Ecological monitoring of water quality in the Bystraya Sosna River
Authors: Polyakov Roman , Petrisheva Tatjana , Usacheva Irina
Published: August 2023

Monitoring studies of the ecological state of small rivers occupy a leading position in the system of environmental protection. This paper provides a detailed analysis of the chemical and microbial indicators of the state of the Bystraya Sosna River in the Lipetsk region of the Russian Federation. The connection of environmental indicators for different seasons of the year is carried out. This made it possible to determine the range of potential hazards for the object under study and to predict the most favorable scenario for the development of this ecosystem.
Geochemical transformations of sulfur in salt lakes (Transbaikalia)
Authors: Borzenko Svetlana
Published: August 2023

The water column in brackish and saline lakes hosts various forms of sulfur including sulfide (hydrosulfide), elemental, thiosulfate, and sulfate sulfur. The unequal distribution of these reduced sulfur species indicates the presence of two opposing processes - sulfate reduction and oxidation of newly formed hydrogen sulfide. The scale of these processes varies among lakes, resulting in differing proportions of reduced sulfur forms. The bacterial reduction of sulfate ions is confirmed by a significant separation of sulfur isotopes into sulfide and sulfate ions, with the lighter isotope accumulating in the former and heavier isotope in the latter. In most soda, chloride, brackish, and salt lakes, sulfate reduction is the principal process responsible for relatively low sulfate ion content. Additionally, the presence of an oxidizing environment and sulfides in host rocks provide additional sources for sulfates, leading to the formation of sulfate-type lakes. The formation of specific types and subtypes of brackish and salt lakes is determined by processes such as water evaporation, dissolution of aluminosilicates, sulfate reduction, and oxidation of sulfides. The dominance of these processes contributes to the geochemical diversity of lakes.
Comparison and verification of research results of geodesic works carried out in meliorative systems with the help of geoinformation software
Authors: Faiziev Sh , Ibragimov U , Kilichev Z , Suyunova H , Hakkulova A
Published: August 2023

The article covers the issues of creation, optimization and rational use of a system that provides the current status, dynamics and changes of location indicators by conducting geodetic and topographic research using modern technologies of mapping based on geoinformation systems, as well as the problems of geodetic and topographic research.
Innovation management in conditions of intensive ecological and economic development
Authors: Nikonorova Alla , Perskaya Victoria , Morkovkin Dmitry , Tao Itao , Kolosova Elena , Shikhalieva Dzhannet , Petrusevich Tatyana
Published: August 2023

In modern conditions, without the implementation of projects related to the introduction of new technologies and developments, taking into account the environmental and social responsibility of business, it is impossible for companies to achieve sustainable development. The article studies the problems of innovative activity and submits the model of management in conditions of intensive development. The purpose of the creation of the model is in business activity streamlining. The proposed model of innovative activity management comprehends the influence of disruptive innovations and gaps caused by innovative technologies. Nowadays the lack of organizational mechanisms in the field of innovative activity management has negative influence on competitiveness of commercial organizations. Intensive development of technologies requires new mechanisms of management. The usage of the presented model creates conditions for rapid development of the most prospective ideas and implementation of new efficient innovative technologies.
Calculation of the weight coefficients of the criteria of the spatial factor and their interrelations with the investment objectives of the purchase of land plots
Authors: Kurlov Alexey , Dozmarov Andrey , Gorkova Viktoriia , Akhmetova Diliara , Chernykh Egor
Published: August 2023

The article presents the results of the distribution of criteria according to investment objectives, which can serve as the basis for developing a mathematical model for assessing the investment attractiveness of land plots. Existing methods for assessing investment attractiveness were analyzed and a new assessment system was compiled. The criteria were ordered by calculating the weights using the T. Saaty Analytic Hierarchy Process, and the interrelations between the criteria and investment objectives were visualized using a graph. The classification and graph given in the study are able not only to determine the relationship between investment objectives and criteria, but also subsequently to form approaches to assessing the quality of the proposed classification.
Deep awareness as a factor of environmental motivation at sea
Authors: Filonenko V A , Tenishcheva V F , Zelenkov G A , Manetskaya S V , Genkin Yu Yu
Published: August 2023

There are environmental problems at sea and some of them are specific. The International Maritime Organization is on the way of strict controlling permanently intensification regulations. One of the most important of them is the International Convention for the Prevention of Pollution from Ships (MARPOL). To prevent uncontrolled and undesired actions of seafarers officers are interested in strong methods including motivating others and themselves as leadership skills are requested by practice and the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW). After considering different types of motives, factors in/decreasing their effectiveness existing at sea, the authors developed the practical research, analyzed the revealed data on the nature of the dominating motives among cadets of the Maritime University and the seafarers, and concluded highly developed awareness of the existing pollution at sea. Established forming experiment proved that the deep awareness of environmental problems adds to the inside, the strongest environmental motivation to fallow International regulations, acceptable from both behavioral and self-controlling points of view. Further actualized professional self-organization strategy helped to educational ecological project development, which were involved in the working courses.
State policy on digitalization of the forest industry
Authors: Valieva A R , Mingazova Z R , Uraev R R
Published: August 2023

Currently, the state management of forest resources in our country needs to be improved. Therefore, in accordance with the decrees of the President of the Russian Federation, the state forestry policy aims at increasing the contribution of this industry to the socio-economic development of the country, the transition to intensive forest management, as well as the protection, safeguard and reproduction of forests. These aims can be effectively achieved through the active implementation of information and communication technologies in the management of the forest sector, which is gradually taking place in practice. However, at the moment, there are certain problems associated with the practical implementation of the forest digitalization strategy. This article presents possible solutions to these problems.
About thinning in the Arkhangelsk region
Authors: Surina E A
Published: August 2023

An analysis was made of the growth of birch-spruce plantations, passed through three stages of thinning (in 1966, 1974 and 1984) in the Northern district forestry (in the Obozersky forestry) in the Arkhangelsk region. The duration of observations is 54 years at the time of the last count in 2020. The results of past studies by employees of the FBU “SevNIILKh” were taken into account. During the period under review, the forest stand in the control section (without thinning) developed quite dynamically. The birch element of the forest prevailed at all stages of growth and was characterized by the highest productivity (I-II quality class) at the age of 40-50 years. At present, the period of active growth has already passed, the stands are approaching the age of natural ripeness, as evidenced by the decrease in the quality class to IV, the decrease in the average height, and the decrease in stock. Spruce in the second tier and in a depressed state. With the continuation of the decay of the birch element and with an increase in the light regime, the spruce will actively grow. The research data show that in stands that have been thinned, the trees become larger, the yield of large-sized marketable wood is greater than in nonsparse ones. Since the main place in the cost of timber belongs to quality indicators, the economic efficiency of plantations with thinning is obvious. Through thinning, it seems possible to form plantings of optimal composition and density, better growth rates and at the stage of main felling, providing a greater economic effect compared to control
Current state of agroforestry pyrology in Russia
Authors: Vereshchagin Evgeny Konstantinovich
Published: August 2023

This article defines the main issues of the research area under consideration, discusses the literature sources of Russian scientists engaged in research in the field of agroforestry pyrology in Russia in recent years. The fundamental issues of fundamental research include the analysis of the occurrence of fires, the characteristics of the spread of fires and their course in various biotopes of agroforestry ecosystems. The nature of the pyrogenic impact is considered from the ecological and evolutionary components of the environment. Applied research issues are developments to improve and increase the efficiency of environmental protection services, assessment and rational use of fires in reclamation plantations. The basic information on fundamental and applied research of domestic scientists is reflected. At present, agroforestry pyrology is a fairly young branch of the science of agroforestry, therefore, insufficient results have been accumulated on theoretical and practical knowledge. The ongoing research is the basis for the development of measures to combat fires in agroforestry landscapes. These activities should include the selection of the most optimal modern means and methods of extinguishing fires, increasing the efficiency of services for the prevention of their development, timely detection, elimination, monitoring, and determining the positive role of fire. The data obtained by domestic researchers constitute a cumulative complex of knowledge about the nature of fires and how to deal with them.
Assessment of the ecological state of a water body for biodiversity monitoring according to biological and hydrochemical indicators
Authors: Muhamedieva D T , Niyozmatova N A
Published: August 2023

The purpose of the work is to assess the ecological state of the reservoir for biodiversity monitoring. Biodiversity monitoring is the systematic and continuous observation and measurement of the diversity of life in a given area or ecosystem. It is carried out to assess changes in biodiversity, identify trends, and determine the effectiveness of management measures and conservation programs. Biodiversity monitoring is a key tool for understanding the state and changes in natural systems, and its results can be used to make decisions in the field of nature conservation and sustainable use of resources. Bioindication can be used for long-term environmental monitoring. Biological organisms can be collected and analyzed over a long period of time, which makes it possible to assess trends in ecosystem changes and their relationship to anthropogenic factors. This takes into account the complex nature of pollution, that is, not only the concentration of certain substances, but also their interaction, synergistic effects and other aspects.
Analysis of greenhouse gas generation models at household waste landfills for ecosystem applications
Authors: Saltykov M Yu , Trifonov S V
Published: August 2023

The control and minimization of greenhouse gas emissions is an important task of modern ecology. One of the sources of greenhouse gases is landfills of household waste (LHW). A special feature of LHWs, as a source of greenhouse gases, is the complexity of estimating emissions. The fact is that the production of greenhouse gases (mainly methane) at LHW is a long process, time-consuming and dependent on many factors. In particular, the rate of putrefaction of organic waste depends on environmental parameters, such as temperature, humidity, and precipitation patterns. Knowing the estimates of greenhouse gas emissions, it is possible to develop an appropriate technology for their disposal, taking into account the regional features of the location of landfills. A mathematical model of gas formation on LHWs is required to solve the problem of predicting greenhouse gas emissions from these landfills. Currently, there are several generally accepted models of LHW. This paper reviews the three main models used in world practice: LandGEM, EPER-Germany, and TNO in terms of their universality and applicability for describing LHW from Siberia region. It was shown that the most promising model is LandGEM.
Modern studies of the cryosphere of the Zeravshan and Gissar Ranges (Tien Shan)
Authors: Frolov D M , Koshurnikov A V , Gagarin V E , Dodoboev E I , Nabiev I A
Published: August 2023

The paper presents brief results of the modern studies of the cryosphere of the Zeravshan and Gissar ranges. Also the rate of decrease in the area of glaciers over the last almost a hundred years and the presence and degradation of permafrost during that time were considered. The actual description of the methodic for estimation of the depth of the ground freezing based on air temperature and snow thickness data were also given. An experience of application of this method for estimating the depth of ground freezing on the mountain slopes in order to compile the maps of the permafrost zone of the Zeravshan and Gissar ranges was described.
Accumulation of cesium-137 Leccinum aurantiacum from podzolic soil
Authors: Ivanov D M , Ivanov E D
Published: August 2023

The accumulation of cesium-137 by the cap and stalk of fruiting bodies of Leccinum aurantiacum (Bull.) Gray from the podzolic soil of an aspen forest 30-35 years old was compared with spruce undergrowth, which resumes after felling and damage to the litter. The average specific activity of caesium-137 for dry caps is 1589±85 Bq/kg and for stems 879±72 Bq/kg. It has been established that the specific activity of cesium-137 does not exceed the allowable values. The coefficients of accumulation of cesium-137 by parts of fruiting bodies from the soil vary in the following range: for caps from 5.4 to 6.8, and for legs from 1.2 to 2.8. The maximum specific activity of caesium-137 was found in the forest litter 461±54 Bq/kg. With increasing depth, it naturally decreases.
Birds of forest ecosystems of Southern Baikal in the conditions of modern climate warming: Dynamics of population density and structure in summer
Authors: Mel’nikov Yuriy
Published: August 2023

On the basis of long-term works (2010-2022), the materials of studying the influence of climate warming on the bird population of forest ecosystems in the summer period are presented. The main indicators of the bird population were studied: population density and species composition. The dynamics of these indicators of the bird population structure and the features of their structure depending on the level of climate change on the ascending branch of the heat-dry phase of the centuries-old climate cycle, close to completion, are considered. The intensity of bird eviction is associated with the localization of very severe, prolonged and extensive droughts. It is the intensity of evictions that determines the new species composition of birds of the studied territories. They are characterized by very low numbers and therefore there is no clear link between the population density of birds and their species richness. At the same time, the general tendency to preserve this pattern (with an increase in the number of species, the population density of birds increases) is noted in some of their main categories. The obtained materials allow us to find out the peculiarities of the dynamics of the biodiversity of birds in Eastern Siberia during periods of severe climatic anomalies. Such materials are extremely important, as they allow us to find out the real role of natural and climatic factors in the evolution of natural ecosystems and the maintenance of the overall biodiversity of large zoogeographic regions of the Earth.
Research and Application of Shale Gas Reservoir-Wellbore Integrated Model Coupling Method
Authors: Yan Silin , Li Mingzhong , Liu Chenwei , Li Haojia , Lv Sen
Published: August 2023

As a representative of emerging unconventional energy, shale gas has the characteristics of large reserves, long production cycle, and environmental protection. However, due to the complex geological characteristics of shale gas reservoirs, the economic development of shale gas reservoirs is difficult. In this paper, on the basis of a full investigation of relevant literature, according to the permeability mechanism of shale gas reservoirs, the productivity of horizontal wells in low-permeability gas reservoirs is studied, and an integrated dynamic simulation model of gas reservoir wellbore is established. And the historical fitting and dynamic forecasting are carried out, and the results are in good agreement with the actual situation.
The oxidation behaviour of pure magnesium in hexafluoropropylene/air atmosphere
Authors: Jiang Hongli
Published: August 2023

The oxidation behaviour of pure magnesium in hexafluoropropylene/air atmosphere at 670-800 °C was investigated by TG, XRD, SEM and EDS. Results show that the oxidation rate of molten pure magnesium increased with the increase of temperature and decrease of HFP concentration. The film formed on the melt surface mainly consisted of MgF2, MgO, C.
Application of fine injection production technology in water drive reservoir
Authors: Li Qianru
Published: August 2023

As the basic condition for ensuring the stability of oil extraction in the development process of oil extraction in our country, some areas have entered the stage of high water cut development. It is very difficult to develop water drive reservoirs in the high water cut development stage, especially under the background of low oil price industry. How to ensure the orderly promotion of the beneficial development of water drive reservoirs and optimize the comprehensive quality of development has become the core of the development process of the industry and enterprises. The core of this is how to use fine injection and production technology. Therefore, the oil production plant needs to integrate different types of water drive reservoir requirements, take it as the core orientation, start based on the water quality source, place the target on good water injection and effective water injection, optimize and innovate fine injection and production technology in an all-round way, so as to achieve the high efficiency of the entire regulation process, improve the quality of water drive, and achieve the development goal of water drive reservoir benefits. Based on this, this paper analyzes this problem, and puts forward some suggestions on the application of technology for reference.
Planning Model for Integrated Energy Supply System in Park Level Regions Under the Energy Internet
Authors: Zhao Ailin , Jiang Feng , Wei Zequan , Liu Shimin
Published: August 2023

With the reduction of traditional fossil fuels and the increasing severity of environmental issues, it is of great significance to study energy system planning and optimization models that complement and integrate multiple energy utilization methods in the context of the energy internet for building an integrated energy supply system. Firstly, this article divides the planning indicators of the regional integrated energy supply system into four categories based on the goal of “two highs and three lows”; Secondly, analyze the three key issues of exergy efficiency, economy, and multi energy coupling in regional integrated energy planning; Finally, a multi-objective planning model for regional integrated energy systems that takes into account equipment capacity planning and operation scheduling optimization is proposed, with the optimization objectives of minimizing the annual value of full life cycle cost and maximizing efficiency, and a double-layer optimization structure is designed for efficient solution.
Optimization of the combination method for tertiary oil recovery layers in Block N
Authors: Chen Huan
Published: August 2023

This article analyzes the development status of oil layers in Zone N, and based on the principles of layer combination in other injected blocks in Zone X, compares the development status of oil layers in Block M, and formulates two sets of layer combination plans for tertiary oil recovery in Block N. By comparing and optimizing the two sets of layer combination plans, the final decision is made to conform to the combination plan for tertiary oil recovery in Block N.
Refracturing well selection method for ultra-low permeability reservoir based on multi-parameter coupling
Authors: Cao Tengfei
Published: August 2023

At present, with the continuous increase in the development of ultra-low permeability reservoirs, fractures are prone to closure during the initial fracturing operation, which will affect the fracture conductivity to a certain extent, and the oil well production shows a gradual decline trend, and the water content of the target oil well is gradually increased. Therefore, in order to ensure a better recovery rate of ultra-low depth oil reservoir, it is necessary to use re-fracturing reconstruction technology for some low-production oil Wells, so as to gradually improve the conductivity of fractured fractures near the target oil well and restore the actual productivity of a single well, which is conducive to realizing the stable production of ultra-low permeability oil reservoir.
Digitalisierung
Authors: Bischof Gallus
Published: August 2023

Liebe Leserinnen und Leser,

wann haben Sie zuletzt ein Videotelefonat geführt? Und welche Antwort
hätten Sie gegeben, wenn ihnen diese Frage vor 4 Jahren gestellt worden
wäre? Die Corona-Pandemie hat zu einer zunächst unfreiwilligen
Verbreitung digitaler Kommunikation beigetragen, und auch jetzt, nachdem wir wieder
in ein weitgehend normales Lebensgefühl zurückgegangen sind, haben
sich viele Lebensbereiche nachhaltig digitalisiert.
Wieder frei atmen
Authors: Gürtler Beate
Published: August 2023

Für eine Sinusitis sprechen eine verstopfte Nase, Krankheitsgefühl, Riechverlust, Gesichts- und Druckschmerz, wobei man eine akute von einer chronischen (infektiösen oder allergischen) Form unterscheidet. Die symptomatische Behandlung aller Arten von Sinusitiden zielt auf das Abschwellen der Schleimhäute, Sekretabfluss, Entzündungshemmung, Belüftung und Befeuchtung. Eine breite Auswahl an natürlichen Therapeutika steht zur Verfügung, darunter Phytotherapeutika, homöopathische Einzel- und Komplexmittel, aber auch Probiotika und eine Anpassung der Ernährung.
Hyperthermie in der komplementärmedizinischen Tumorbehandlung im Krankenhaus für Naturheilweisen München
Authors: Schmidt Robert
Published: August 2023

Das Krankenhaus für Naturheilweisen (KfN) in München Harlaching ist mit 110 Betten eine der größten Einrichtungen für eine stationäre integrative Patientenversorgung im deutschsprachigen Raum. Aus schulmedizinischer Sicht ist das KfN eine internistische Fachklinik, die auf die ergänzende komplementärmedizinische Behandlung chronisch kranker Patienten aus nahezu allen schulmedizinischen Fachdisziplinen spezialisiert ist. Hierzu zählen auch Tumorpatienten. Ein fester Bestandteil der supportiven Therapie bei Tumorpatienten ist die Hyperthermie, eine der ältesten Behandlungsmethoden der Menschheit. Zum einen kommt im KfN die sog. moderate Ganzkörperhyperthermie zur Stärkung des Immunsystems zum Einsatz, um das Allgemeinbefinden zu verbessern sowie Krankheitssymptome und Nebenwirkungen der konventionellen Therapien zu reduzieren. Zum anderen wird die lokoregionäre Hyperthermie eingesetzt, bei der das maligne Gewebe gezielt auf 42–44 °C erhitzt werden soll, um den Tumorzellen einen thermischen Schaden zuzuführen.
Evidenz, Verfügbarkeit und Zukunftsvisionen der Simulation in der Allgemein- und Viszeralchirurgie
Authors: Huber Tobias , Huettl Florentine , Vradelis Lukas , Lang Hauke , Grimminger Peter , Sommer Nils , Hanke Laura Isabel
Published: August 2023

Übung macht den Meister – ein Spruch, den sicherlich jeder schon gehört hat. Das Üben von Chirurginnen und Chirurgen jeder Weiterbildungsstufe kann nachweislich zu einem Teil an Simulatoren
absolviert werden. Dieses Training außerhalb des Operationssaales und unabhängig von Patienten ist sowohl ethisch als auch finanziell sinnvoll. Obwohl die Effektivität von Simulation in der
Chirurgie mehrfach erwiesen wurde, ist ein Simulationstraining in Deutschland bisher kein verpflichtender Bestandteil der chirurgischen Facharztweiterbildung. Simulation umfasst dabei ein
sehr breites Spektrum hinsichtlich Anwendung, Aufwand und Kosten. Die vorliegende Arbeit gibt einen Überblick über die Systeme und deren Einsatzgebiete und Zielgruppe. Der Fokus soll auf den
gängigen verfügbaren Systemen liegen und mögliche Vor- und Nachteile herausarbeiten. Praktische Fertigkeiten stehen dabei im Vordergrund und alle 3 Säulen der Allgemein- und
Viszeralchirurgie – konventionelle Techniken, Laparoskopie und Robotik – werden berücksichtigt. Simulatoren erzielen für sich genommen jedoch keine Kosten-Nutzen-Effektivität. Erst durch ein
standortspezifisches strukturiertes Weiterbildungskonzept, in dem weiterbildungsstufengerechtes Simulationstraining mit entsprechender Einteilung im Operationssaal eng miteinander verzahnt
werden, kann das volle Potenzial einer solchen Investition genutzt werden. Basisfertigkeiten sollten immer vor Ort trainiert werden können. Komplexe Simulationssysteme sind je nach
finanzieller Ausstattung realisierbar oder sollten aufgrund der deutlichen Mehrkosten im Verbund oder für überregionale Kurse angeschafft werden. Die Techniken der immersiven virtuellen
Realität in Kombination mit künstlicher Intelligenz und Deformationsalgorithmen werden für die Zukunft der Simulation sicherlich eine entscheidende Rolle spielen, wobei zunächst die Nutzung
der verfügbaren Systeme ein primäres Ziel sein muss. Die Integration von Simulation in die Facharztweiterbildung ist dabei anzustreben, nicht zuletzt, um die Finanzierung zu erleichtern.
Uterine Vascular Anomalies: Management and Treatment Overview
Authors: Matsumoto Monica M. , Caridi Theresa M.
Published: August 2023

Uterine vascular anomalies (UVAs), while rare, can result in severe, life-threatening hemorrhage. An understanding of the presentation and management options for UVAs is important for interventional radiologists to appropriately evaluate and care for these patients. The authors propose a standardized terminology for UVAs to avoid confusion and conflating congenital from acquired vascular lesions, which have a different pathophysiology. Limited high-level evidence and no definitive guidelines for UVA management exist, although endovascular treatment with uterine artery embolization has generally become the first-line approach for symptomatic or persistent UVAs with high technical and clinical success rates. There is also no consensus on the optimal embolization technique; the authors propose an initial approach to first embolize the dominant uterine artery supplying the UVA with gelatin sponge, with the option to embolize the contralateral side at the time of initial embolization if there is persistent supply (avoiding bilateral empiric embolization). Repeat embolization is feasible and recommended in the setting of recurrence, and both clinical and imaging follow-up is important. Ultimately, a multidisciplinary approach with individualized patient management is needed, particularly in the face of a lack of consensus guidelines for the management of symptomatic UVAs.
Management of Rectal Cancer in Lynch Syndrome: Balancing Risk Reduction and Quality of Life
Authors: Krasnick Bradley A. , Kalady Matthew F.
Published: August 2023

Patients with Lynch syndrome are predisposed to developing colorectal cancer and a variety of extracolonic malignancies, at a young age. The management of rectal cancer in the setting of Lynch syndrome is a complex clinical scenario that requires the expertise of a multidisciplinary management team. In this review, we delve into the approach for rectal cancer in these patients, and specifically focus on several key aspects of treatment. Some unique aspects of rectal cancer in Lynch syndrome include the decision between proctectomy alone versus total proctocolectomy with or without an ileal pouch, the utility of chemotherapy and immunotherapy, nonoperative rectal cancer management, and the management of rectal polyps. Throughout, we highlight the delicate interplay between future cancer risk reduction and quality of life optimization.
Robotic Interventional Neuroradiology: Progress, Challenges, and Future Prospects
Authors: Ning Shen , Chautems Christophe , Kim Yoonho , Rice Hal , Hanning Uta , Al Kasab Sami , Meyer Lukas , Psychogios Marios , Zaidat Osama O. , Hassan Ameer E. , Masoud Hesham E. , Mujanovic Adnan , Kaesmacher Johannes , Dhillon Permesh S. , Ma Alice , Kaliaev Artem , Nguyen Thanh N. , Abdalkader Mohamad
Published: August 2023

Advances in robotic technology have improved standard techniques in numerous surgical and endovascular specialties, offering more precision, control, and better patient outcomes. Robotic-assisted interventional neuroradiology is an emerging field at the intersection of interventional neuroradiology and biomedical robotics. Endovascular robotics can automate maneuvers to reduce procedure times and increase its safety, reduce occupational hazards associated with ionizing radiations, and expand networks of care to reduce gaps in geographic access to neurointerventions. To date, many robotic neurointerventional procedures have been successfully performed, including cerebral angiography, intracranial aneurysm embolization, carotid stenting, and epistaxis embolization. This review aims to provide a survey of the state of the art in robotic-assisted interventional neuroradiology, consider their technical and adoption limitations, and explore future developments critical for the widespread adoption of robotic-assisted neurointerventions.
Overview of the Gut–Brain Axis: From Gut to Brain and Back Again
Authors: Post Zoë , Manfready Richard A. , Keshavarzian Ali
Published: August 2023

The gut–brain axis refers to a bidirectional communication pathway linking the gastrointestinal system to the central nervous system. The hardware of this multifaceted pathway takes many forms, at once structural (neurons, microglia, intestinal epithelial cell barrier), chemical (neurotransmitters, enteroendocrine hormones, bacterial metabolites), and cellular (immune signaling, inflammatory pathways). The gut–brain axis is exquisitely influenced by our environment, diet, and behaviors. Here, we will describe recent progress in understanding the gut–brain axis in neurological disease, using Parkinson's disease as a guide. We will see that each component of the gut–brain axis is heavily mediated by intestinal microbiota and learn how gut–brain communication can go awry in microbial dysbiosis.
The Interface between Inflammatory Bowel Disease, Neuroinflammation, and Neurological Disorders
Authors: Hey Grace E. , Vedam-Mai Vinata , Beke Matthew , Amaris Manuel , Ramirez-Zamora Adolfo
Published: August 2023

Inflammatory Bowel Disease (IBD) is a complex, chronic inflammatory condition affecting the gastrointestinal tract. IBD has been associated with a variety of neurologic manifestations including peripheral nerve involvement, increased risk of thrombotic, demyelinating and events. Furthermore, an evolving association between IBD and neurodegenerative disorders has been recognized, and early data suggests an increased risk of these disorders in patients diagnosed with IBD. The relationship between intestinal inflammatory disease and neuroinflammation is complex, but the bidirectional interaction between the brain-gut-microbiome axis is likely to play an important role in the pathogenesis of these disorders. Identification of common mechanisms and pathways will be key to developing potential therapies. In this review, we discuss the evolving interface between IBD and neurological conditions, with a focus on clinical, mechanistic, and potentially therapeutic implications.
Objective Clinical Measurement Tools for Functional Evaluation of the Surgical Patient
Authors: Thomas Jacob , Hall Jamie B. , Schauffler Rose , Guess Trent M.
Published: August 2023

Following knee surgery, clinicians have traditionally used visually rated or time-based assessments of lower extremity movement quality to measure surgical outcomes, plan rehabilitation interventions, and measure success. These methods of assessment are prone to error and do not fully capture a patient's inefficient movement patterns post surgery. Further, currently available systems which objectively measure kinematics during these tasks are expensive and unidimensional. For these reasons, recent research has called for the development of objective and low-cost precision rehabilitation tools to improve clinical measurement of movement tasks. The purpose of this article is to highlight two such tools and their applications to knee surgery. The systems highlighted within this article are the Mizzou Point-of-Care Assessment System (MPASS) and the Mizzou Knee Arthrometer Testing System (MKATS). MPASS has demonstrated high levels of agreement with the gold-standard Vicon system in measuring kinematics during sit-to-stand (R > 0.71), lateral step-down (intraclass correlation coefficient [ICC] > 0.55, apart from ankle flexion), and drop vertical jump tasks (ICC > 0.62), as well as gait (R > 0.87). MKATS has been used to quantify differences in tibiofemoral motion between groups during lateral step-down, step-up-and-over, and step-up/step-down tasks. Objective measurement of clinical tasks using portable and inexpensive instruments, such as the MPASS and MKATS, can help clinicians identify inefficient movement patterns and asymmetries which may damage and wear down supporting structures within the knee and throughout the kinetic chain causing pain and discomfort. Identifying these issues can help clinicians to plan interventions and measure their progress at a lower cost than currently available systems. The MPASS and MKATS are useful tools which have many applications to knee surgery.
A velocity map imaging spectrometer for measuring absolute differential cross sections for ion-induced electron emission from molecules
Authors: Sens N. , Ryszka M. , Poully J.-C. , Méry A. , Chesnel J.-Y. , Vizcaino V.
Published: August 2023

In this paper, we present a newly developed crossed beam experimental setup that utilizes the velocity map imaging (VMI) technique to simultaneously measure both the kinetic energy and emission angle of electrons emitted from atoms or molecules upon ion collision. The projectile ion beam with keV to MeV kinetic energy orthogonally crosses the neutral target beam produced by an effusion cell. The emitted electrons are extracted and analyzed by a multi-electrode VMI spectrometer. By monitoring the target density, the projectile ion beam intensity, and the beams’ overlap, we are able to measure absolute differential cross sections for collision-induced electron emission from molecules. The characterization of the setup and the methodology will be presented as well as first results for electron emission from uracil upon 0.98 MeV/u 12C4+ collision.