Limited Conditions Research Articles

A truncated antenna mutant of the unicellular green alga Coccomyxa sp. strain Obi shows better biomass productivity than the wild-type strain under higher irradiance, at higher cell density, and in greater depth of culture

Mutants with reduced chlorophyll contents were isolated from the industrial green alga Coccomyxa sp. strain Obi after chemical mutagenesis. The growth of most of the isolates was slower than that of the parental strain with one exception, which was named strain 5P. Chlorophyll a (Chl a) content in rapidly growing cells of strain 5P was >30 % lower than the wild-type level, while its chlorophyll b (Chl b) content was below 20 %. Strain 5P did not have trimeric light-harvesting antenna complexes (LHCs) for photosystem (PS) II, but its reaction centers for PSI and PSII were intact. Whole-genome resequencing of strain 5P identified many mutations, including a nonsynonymous mutation in the gene encoding chlorophyllide a oxygenase (CAO) involved in the biosynthesis of Chl b. Chl b is present only in LHCs, and the reduction of Chl b confers the reduction of LHCs that accompanies the reduction of Chl a. Genetic complementation of strain 5P with the genomic CAO gene (CAO) resulted in the full recovery of Chl a and Chl b contents. Thus, the low-chlorophyll phenotype of strain 5P was caused by the CAO mutation. The growth yields of strain 5P were superior to those of the wild-type strain in deeper cultures, and in nutrient-rich culture medium that supported cell growth to higher densities. The growth advantage over the wild-type strain was not observed in the CAO-complemented strains. We concluded that the mutant possessing a smaller antenna size exhibits a growth advantage under limited growth conditions.

Scatter gram patterns of hematological malignancies in Sysmex XN series

Background: Scatter grams-graphic depictions of the cell populations in a blood sample are produced by automated analyzers. These scatter grams can be employed to screen for various hematological conditions, including anemia, leukemia, and other blood disorders by examining the scatter gram’s cell population distribution and patterning. Aims and Objectives: In this study, we wish to study the scatter grams generated by the Sysmex XN-series analyzer for confirmed cases of hematological malignancies. Materials and Methods: In this study, 58 cases of hematologic malignancies diagnosed based on peripheral smear findings and bone marrow morphology data were extracted. We retrieved the complete blood count and scatter gram patterns analyzed by Sysmex XN-1000 analyzer for these cases along with peripheral smear findings. Scatter gram patterns in white blood cell differential and white cell nucleated were analyzed correlating with peripheral smears. Results: Among 58 cases, 20 cases were acute myeloid leukemia (6 were acute promyelocytic leukemia), 32 cases were chronic myeloid leukemia, and 5 cases were chronic lymphocytic leukemia. Unique scatter gram patterns were seen with different leukemias. Conclusion: Pattern analysis of scatter grams has the potential to improve the efficiency and accuracy of leukemia diagnosis and also help to prioritize the evaluation of cases that require further testing, such as molecular and cytogenetic evaluations, especially in limited resources or high sample volumes conditions.

Performance of bamboo biochar as partial cement replacement in mortar

Pyrolysis under limited oxygen conditions at high temperatures is used to produce bamboo biochar. The construction industry often utilizes cement, which is a significant contributor to greenhouse gas emissions and environmental damage. To decrease the use of cement, this study examines the effectiveness of bamboo biochar as a partial cement replacement in mortar. The study determines the optimal percentages of bamboo biochar as a partial replacement and evaluates its mechanical performance in terms of compressive and flexural strength. The percentages tested include a smaller range of 0.5%, 1%, 1.5%, and 2%, and a higher range of 5%, 10%, 15%, and 20%. The samples are cured for 7, 14, and 28 days. The study concludes that 10% is the optimal percentage replacement for compressive strength, while 5% is optimal for flexural strength. Additionally, the study finds that according to ASTM C618-19, bamboo biochar is best classified as a filler rather than a pozzolan, as it does not meet the class N-pozzolan requirement.

A new model to predict soil thermal conductivity

Thermal conductivity is a basic parameter of soil heat transferring, playing an important role in many fields including groundwater withdrawal, ground source heat pump, and heat storage in soils. However, it usually requires a lot of time and efforts to obtain soil thermal conductivity. To conveniently obtain accurate soil thermal conductivity, a new model describes the relationship between soil thermal conductivity (λ) and degree of saturation (Sr) was proposed in this study. Dry soil thermal conductivity (λdry) and saturated soil thermal conductivity (λsat) were described using a linear expression and a geometric mean model, respectively. A quadratic function with one constant was added to calculate λ beyond the lower λdry and upper λsat limit conditions. The proposed model is compared with five other frequently used models and measured data for 51 soil samples ranging from sand to silty clay loam. Results show that the proposed model match the measured data well. The proposed model can be used to determine soil thermal conductivity of a variety of soil textures over a wide range of water content.

Cyclic loading test for lightly reinforced exterior wall with openings

Recently, slender and lightly reinforced exterior walls with large openings have been frequently used in high-rise residential buildings for economical construction. Although the exterior walls can be severely damaged by moderate earthquakes, minimum reinforcement is used, and the seismic details are not used in the current design practice because it is assumed that the seismic performance of the exterior walls is not significant in the entire structure. To investigate the strength and damage mode of the exterior walls, four exterior wall specimens with openings were tested under cyclic lateral loading. The main test parameters were the type of the openings (i.e., small, horizontal slot, vertical slot), and the reinforcement ratio in the horizontal components (horizontally 0.42–1.29%, and vertically 0.28–0.89%). The test results indicated that the peak strengths of the exterior walls with large depth of the horizontal components reached the nominal flexural strengths calculated by assuming solid walls and neglecting the opening effect. However, due to the premature tensile fracture of the vertical rebars, the lateral stiffness was significantly degraded, and the energy dissipation was limited. Further, the maximum crack width was affected by opening type and reinforcement ratio. A parametric study was conducted using a finite element (FE) model to investigate the effects of the design parameters. Based on the test and analysis results, a design recommendation for exterior walls with openings was provided. The exterior walls can be designed as solid walls under the following limited conditions: the total opening areas are less than 10% of the wall area in elevation, the relative flexural stiffness of the horizontal components is greater than the lateral stiffness of the walls, and the axial load ratio is less than 10%. Further, the allowable lateral drift ratio for permissible crack damage was suggested to be 0.10%.

Software and Hardware Complex Development toMonitor Production Activities Based on the YOLOv8 Neural Network

The article discusses the features of software and hardware complex development to monitor the efficiency of employees by means of an ESP8266 microcontroller and video cameras with a YOLOv8 neural network that meets the requirements of a 'smart shop'. The purpose of this study is to justify and evaluate the working concept of the created software and hardware complex in the form of a working prototype. Examples of current developments of similar monitoring systems realized within the paradigm of the Internet of Things, are given. However, the systems found in international practice focus on processing images of moving personnel only and do not analyze the technical parameters of the equipment this personnel work on. This study attempts to overcome this limitation. A schematic diagram of the system operation consisting of four key modules has been developed: a data collection module from machine-tools, an employee identification module, a primary data processing module, a web server with software application to manage the entire system in real time. The MQTT (Message Queuing Telemetry Transport) protocol is used for communication between devices and the server in the designed system to provide quality of data transmission under conditions of channel bandwidth limitations. Combined analysis of data from both machine-tools (control of the load of the electric motor) and the movement of workers in the space of the production room is proposed within the concept of developing such systems for the first time. Evaluation tests on the monitored data showed the operability of the entire complex, the problem of object automatic detection in the camera image flow and their location within the coordinate system of the production room was solved.

Investigations on energy efficiency enhancement under knock threshold limit conditions for a turbocharged direct-injection spark-ignition engine fueled with wet ethanol

Wet ethanol is a promising biofuel whose properties fit with turbocharged direct-injection spark-ignition (DISI) engines for countries with yearly production capacity. Even though it has a higher life-cycle efficiency than regular ethanol, which reduces significantly the energy required on ethanol production, wet ethanol’s potential is wasted by the continuous dehydration process. In order to highlight such potential as a fuel for engines, this study investigates the early injection of different blends of wet ethanol (E100W0, E95W5, E90W10, and E80W20, respectively) via an in-house engine simulator to improve engine operating conditions — enhancing engine and ethanol’s life-cycle efficiencies. This study searched for the highest sustainable values of engine energy and exergy efficiencies based on the threshold value of the knock index number. The combustion phasing model used correlations obtained from a machine learning algorithm fed with experimental data for a DISI engine. This investigation provided 120 different cases under different compression ratios (r), engine speeds, relative air-fuel ratios, and wet ethanol blends. Results showed that E80W20 can operate with a turbocharger at r = 18. The highest efficiencies (43% and 40%, respectively) were found for E90W10 and E80W20 — values 30% higher than regular Brazilian FFV. Lastly, cases involving the best conditions for torque, lean air-fuel conditions at high compression ratios and water content, and downspeeding are presented as interesting alternatives to either stationary engines or hybrid vehicles, therefore highlighting the potential of wet ethanol for DI engines.

Local wisdom and tourism development in Kampung Nglanggeran, Gunung Kidul, Yogyakarta

This research aims to examine the positive impact of local wisdom on environmental sustainability and tourism development. In this study, a qualitative approach was conducted through observations and interviews. This research has conducted the analysis using a descriptive ethnographic approach to reveal the meaning behind the local wisdom. The results show that being part of the UNESCO Global Geopark has special meaning for Gunung Sewu in Java, Indonesia. Geoparks are concerned with conserving and developing geological diversity and aiming to develop and conserve the cultures within them. Pitu village preserves local wisdom, one of which is the seven-family restriction. Local wisdom in this village is closely related to limited natural conditions. Kampung Pitu is located at the top of Mount Nglanggeran, and no more than seven families can live here because they have taboos or rules from the past. All the local wisdom carried out by the people of Kampung Pitu was based on preserving nature and the entire community's safety. The preservation of heritage will provide uniqueness and attract tourists on its own.

SEARCH FOR WAYS OF INTENSIFICATION USE OF CITY TERRITORY

The article considers Land Management as an effective technique for improving the quality of life in cities. It emphasizes the importance of the distribution of socio-economic activities according to various parameters to increase the efficiency of the use of the urban area. Major categories of activities such as residential, commercial, transport, public and government institutions are considered in order to maintain a balance between them. The article also notes the importance of land use planning for sustainable development and optimal use of resources in conditions of limitation. It highlights that urban areas with high population density should be developed according to master plans that include land use plans. The article also notes that urbanization needs adequate leadership, which is provided through regional planning, urban planning, land use planning, transport policy, and public administration. The paper also highlights the advantages of compact cities with multiple uses, such as reducing fuel consumption, urban land use, and ensuring sociocultural development.
 Studying the experience of Europe, the USA and Australia proved the expediency of promoting spatially compact cities with various goals. It has been studied that compact cities offer the opportunity to reduce fuel consumption for travel, as homes, work and recreation are located close to each other. They are also favored because urban land can be reused, while rural land outside the city is protected. A good quality of life is believed to be supported by a high concentration of people, which provides social conditions conducive to liveliness, vivacity, and cultural production and consumption.

Video characteristics for remote recognition of agonal respiration: A pilot study

AimThe mobile network quality in ambulances can be variable and limited. This pilot study aimed to identify a suitable network setting for recognizing agonal respiration under limited network conditions. MethodsWe recruited five emergency medical technicians, and each participant viewed 30 real-life videos with different resolutions, frame rates, and network scenarios. Thereafter, they reported the respiration pattern of the patient and identified agonal respiration cases. The time at which agonal respiration was identified was also recorded. The answers provided by the five participants were compared with those of two emergency physicians to compare the accuracy and time delay in breathing pattern recognition. ResultsThe overall accuracy for initial respiratory pattern recognition was 80.7% (121/150). The accuracy for normal breathing was 93.3% (28/30), for not breathing was 96% (48/50), and for agonal breathing was 64.3% (45/70). There was no significant difference in successful recognition between video resolutions. However, the rate of time delay in recognizing agonal respiration less than 10 seconds between 15-fps group and 30-fps group had statistical significance (21% vs 52%, p = 0.041). ConclusionThe frame rate emerges as one of critical factors in agonal respiration recognition through telemedicine, outweighing the significance of video resolution.

LS Dyna ile Serbest Hava Ortamındaki Patlama Yükünün Sayısal Simülasyonu için SPH, ALE, Birleştirilmiş ALE-LBE ve CONWEP Yöntemlerinin İncelenmesi

Different simulation methods can be used to model the response of structures to the effects of blast loading. While some simulation methods are based on empirical blast loading principles, other methods use a fluid structure interaction algorithm to predict post-explosion shock waves and their physical effects. In this study, CONWEP, SPH, ALE, and coupled MM-ALE with LBE numerical methods were compared against each other according to results from an experimental study. Each method was compared with the test results in terms of solution time, convergence, and the use for different explosive types and environments. According to this comparison, it was concluded that empirical methods can be used for more limited environmental conditions and blast types, ALE numerical methods can give very sensitive results even in different solution sets but the solution time is long. Meanwhile in SPH method, the interaction of the air and blast shock cannot be fully modelled. According to the results of the study, the hybrid method is consistent with the test results in terms of peak pressure with a deviation of 7.44% at P1 and 2.29% at P2 under spherical free air blast loading conditions. However, since the effects of reflected pressure cannot be modelled exactly in the hybrid method, the ALE method should be preferred in cases with more complex geometries.

Evaluation of Detection Efficiency for Trio Full Sibling Testing.

To study the detection efficiency of trio full sibling with another known full sibling reference added under different number of autosomal STR typing systems. Based on 43 detection systems consisting of 13 to 55 representative autosomal STR loci, 10 000 true families (full sibling group) and 10 000 false families (unrelated individual group) were randomly simulated. The full sibling index (FSI) was calculated based on the method of family reconstruction. The cumulative sibling relationship index (CFSI) of 0.000 1 and 10 000 were used as the evaluation thresholds, and the detection efficiency parameters were calculated and compared with the identification of the duo full sibling testing. With the increasing number of STR loci, the error rate and inability of judgement rate gradually decreased; the sensitivity, specificity, correct rate of judgment and other parameters gradually increased, and the system efficiency gradually improved. Under the same detection system, trio full sibling testing showed higher sensitivity, specificity, system efficiency and lower inability of judgement rate compared with duo full sibling testing. When the system efficiency was higher than 0.85 and inability of judgement rate was less than 0.01%, at least 20 STRs should be detected for trio full sibling testing, which was less than 29 STRs required by duo full sibling testing. The detection efficiency of trio full sibling testing is superior to that of duo full sibling testing with the same detection system, which is an effective identification scheme for laboratories with inadequate detection systems or for materials with limited conditions.

Biochar production from microalgae: a new sustainable approach to wastewater treatment based on a circular economy

The generation of wastewater due to human activities are the main responsible for environmental problems. These problems are caused by the large amount of organic and inorganic pollutants related to the presence of pesticides, metals, pathogens, drugs and dyes. The photosynthetic treatment of effluents emerges as a sustainable and low-cost alternative for developing wastewater treatment systems based on a circular economy. Chemical compounds present in wastewater can be recovered and reused as a source of nutrients in microalgae cultivation to produce value-added bioproducts. The microalgal biomass produced in the cultivation with effluents has the potential to produce biochar. Biochar is carbon-rich charcoal that can be obtained by converting microalgae biomass through thermal decomposition of organic raw material under limited oxygen supply conditions. Pyrolysis, torrefaction, and hydrothermal carbonization are processes used for biochar synthesis. The application of microalgal biochar as an adsorbent material to remove several compounds present in effluents is an effective and fast treatment. This effectiveness is usually related to the unique physicochemical characteristics of the biochar, such as the presence of functional groups, ion exchange capacity, thermal stability, and high surface area, volume, and pore area. In addition, biochar can be reused in the adsorption process or applied in agriculture for soil correction. In this context, this review article describes the production, characterization, and use of microalgae biochar through a sustainable approach to wastewater treatment, emphasizing its potential in the circular economy. In addition, the article approaches the potential of microalgal biochar as an adsorbent material and its reuse after the adsorption of contaminants, as well as highlights the challenges and future perspectives on this topic.

Microbial Growth under Limiting Conditions-Future Perspectives.

Microorganisms rule the functioning of our planet and each one of the individual macroscopic living creature. Nevertheless, microbial activity and growth status have always been challenging tasks to determine both in situ and in vivo. Microbial activity is generally related to growth, and the growth rate is a result of the availability of nutrients under adequate or adverse conditions faced by microbial cells in a changing environment. Most studies on microorganisms have been carried out under optimum or near-optimum growth conditions, but scarce information is available about microorganisms at slow-growing states (i.e., near-zero growth and maintenance metabolism). This study aims to better understand microorganisms under growth-limiting conditions. This is expected to provide new perspectives on the functions and relevance of the microbial world. This is because (i) microorganisms in nature frequently face conditions of severe growth limitation, (ii) microorganisms activate singular pathways (mostly genes remaining to be functionally annotated), resulting in a broad range of secondary metabolites, and (iii) the response of microorganisms to slow-growth conditions remains to be understood, including persistence strategies, gene expression, and cell differentiation both within clonal populations and due to the complexity of the environment.

Impact of the antidepressant Bupropion on the Dynamic Energy Budget of Daphnia magna

Psychiatric drugs are considered among the emerging contaminants of concern in ecological risk assessment, due to their potential to disrupt homeostasis in aquatic organisms. Bupropion is an antidepressant that acts by selective reuptake inhibition of norepinephrine and dopamine. Little is known about this compound's effects on aquatic organisms, despite being detected in significant concentrations in both water and biota close to waste-water treatment plants and densely populated areas. Dynamic Energy Budget (DEB) models are flexible mechanistic tools that can be applied to understand toxic effects and extrapolate individual responses to higher biological levels and under untested environmental conditions. In this work, we used the stdDEB-TKTD (an application of the DEB theory to ecotoxicology) approach to investigate the possible physiological mode of action of Bupropion on the model organism Daphnia magna. Next, Dynamic Energy Budget Individual-Based Models (DEB-IBM) were used to extrapolate the results to the population level and to predict the combined effects of Bupropion exposure and food availability on the daphnids. Our results revealed an increasing negative effect of this antidepressant on the reproduction and survival of the animals with increasing concentration (0.004, 0.058, 0.58 and 58 μM). At the population level, we found that even the lowest used doses of Bupropion could reduce the population density and its reproductive output. The impacts are predicted to be stronger under limited food conditions.

Measurement Invariance in Longitudinal Bifactor Models: Review and Application Based on the p Factor.

Bifactor models are increasingly being utilized to study latent constructs such as psychopathology and cognition, which change over the lifespan. Although longitudinal measurement invariance (MI) testing helps ensure valid interpretation of change in a construct over time, this is rarely and inconsistently performed in bifactor models. Our review of MI simulation literature revealed that only one study assessed MI in bifactor models under limited conditions. Recommendations for how to assess MI in bifactor models are suggested based on existing simulation studies of related models. Estimator choice and influence of missing data on MI are also discussed. An empirical example based on a model of the general psychopathology factor (p) elucidates our recommendations, with the present model of p being the first to exhibit residual MI across gender and time. Thus, changes in the ordered-categorical indicators can be attributed to changes in the latent factors. However, further work is needed to clarify MI guidelines for bifactor models, including considering the impact of model complexity and number of indicators. Nonetheless, using the guidelines justified herein to establish MI allows findings from bifactor models to be more confidently interpreted, increasing their comparability and utility.

Climate-smart forestry in the world’s drylands: A review of challenges and opportunities

Land degradation and desertification are widespread across the world’s drylands. These processes are substantially affected by climatic change, with long-term and severe droughts on the one hand, and high intensity rainstorms and devastating floods on the other hand. Simultaneously, land-use change and mismanagement practices have led to processes of accelerated soil erosion, depletion of soil organic carbon pools, and the degradation of extensive drylands. Forestry has been accepted as an effective means for restoring degraded drylands, and for attaining a range of regulating, provisioning, supporting, and cultural ecosystem services. Specifically, forestry is widely perceived as an effective means for soil erosion control, organic carbon sequestration, microclimate improvement, and climate change mitigation. However, forestry in drylands often proves to generate substantial environmental challenges, resulting in deterioration of ecosystem functions and health. The objective of this essay is to review the challenges and opportunities induced by dryland afforestation and reforestation, and highlight the need to attain climate-smart strategies for establishing and managing these land-uses. Particularly, tree species invasion and allelopathy, which are common in dryland forestry projects, jeopardize species richness and diversity of native vegetation communities. Further, the challenges linked with tree invasiveness necessitate predicting the distribution of potentially invasive species and foreseeing their impacts on the recipient ecosystems under projected climate change scenarios. The effect of allelopathy is significant under limited water availability conditions and is expected to be determined by the expanding drylands and intensifying aridity worldwide. Therefore, judicious selection of tree species should not only focus on ones with high water-use efficiency, low flammability, high pest resistance, and fast growth, but also on low invasiveness and allelopathic capacities. Insights of this essay may be used by land managers, stakeholders, and policy makers involved in environmental development of drylands.

Iron metabolism disorders of patients with chronic paracoccidioidomycosis.

Paracoccidioidomycosis (PCM) is caused by Paracoccidioides spp.; during infection, some host mechanisms limit the availability of iron, thereby reducing its reproduction. However, Paracoccidioides spp. can evade the immune defense and, even under limited iron conditions, use this mineral for growth and dissemination. This study evaluated the iron metabolism of 39 patients who were diagnosed with chronic PCM from 2013 to 2021. The forms of iron before treatment and at the time of clinical cure were evaluated based on the following: serum ferritin levels (storage iron); total iron-binding capacity (TIBC) and transferrin saturation (TSAT) level (transport iron); red blood cell (RBC), hemoglobin (Hb), hematocrit (HCT), and soluble transferrin receptor (sTfR) levels; and sTfR/log ferritin ratio (functional iron). The mean age of the patients was 54.5 years (±6.7 years). Most patients were men (97.4%), rural workers (92.1%), and smokers (84.6%); furthermore, most had moderate disease severity (66.7%). After achieving clinical cure, we observed that serum ferritin levels decreased, and parameters of functional iron increased. The extent of alteration in these parameters were more pronounced in severe cases than in to mild or moderate cases. Furthermore, moderate correlations were observed between C-reactive protein and the Hb (r = -0.500; p = 0.002), RBC (r = -0.461; p = 0.005), HCT (r = -0.514; p = 0.001), and iron levels (r = -0.491; p = 0.002). However, it is possible to infer that PCM interferes with functional and storage iron because improvements in these parameters after treatment as well as associations with disease severity were observed. PCM can lead to anemia of inflammation, which can be differentiated from iron deficiency anemia by a careful investigation of the iron form parameters.

Genetic analysis of sunflower fatty acids under optimum and water stressed conditions

Abstract In order to study the genetic control of sunflower fatty acids under optimum and water limited conditions a set of 12 sunflower hybrids were evaluated as randomized complete block design with three replications in two separate experiments during two years (2019 and 2020) in Karaj, Iran. The hybrids were obtained by crossing of four male sterile lines and three restorer lines as testers. Water limitation was imposed by water withholding during reproductive stage. Palmitic acid content was governed by both additive and non-additive effects and linoleic acid content by non-additive gene action under optimum and water limited conditions. Stearic acid content was controlled by both additive and non-additive effects in optimum but by additive effects under water limited condition. Oleic acid content was governed by non-additive factors in optimum, while by both additive and non-additive effects in water limited condition. Oil content and leaf temperature were inherited by additive and seed yield by additive and non-additive effects in both conditions. Relative water content and chlorophyll content were controlled by both additive and non-additive effects under optimum but by non-additive effects in water limited condition. According to these results hybrid breeding is suggested for improvement of main sunflower fatty acids under optimum and water limited condition except that selection-based methods for improvement of stearic acid content.

Features of resource management in the HoReCa sphere during the war period

Introduction. During the war, the hotel and restaurant industry is faced with a lack of resources and the provision of quality services. Understanding the nature of resource management in conflict situations is critical to mitigating the negative impact on the HoReCa business. The purpose of the article is to study the features of resource management in the HoReCa sphere during the war. Results. Resource management was determined as a crucial aspect of effective management in the context of the HoReCa sphere during times of war. The meaning of the HoReCa industry covering hotels, restaurants and catering services was considered. Various factors have been identified that affect the HoReCa business during wartime, including threats to personnel safety, risks of destruction of equipment and infrastructure, lack of resources and others. The main features of resource management in HoReCa sphere in wartime were investigated: ensuring the safety of staff and customers, rational use of resources and change management. Ensuring the safety of staff and customers in wartime is in the first place. It is indicated that in order to create security, it is important for enterprises to develop risk management plans, use modern technologies and cooperate with security services and authorities. In conditions of limited resources, effective management of material, financial and human resources includes meticulous budget planning, cost control, and efficient utilization of available financial tools. It is emphasized that managing changes in wartime allows enterprises to adapt to new conditions, quickly respond to changes and use resources efficiently to ensure stability and success. Conclusions. The article discusses the specificities of resource management in the HoReCa sphere during wartime. It emphasizes the priority of ensuring safety for both staff and customers, necessitating the implementation of appropriate measures and training. Rational resource utilization and adaptability to changes are also highlighted as crucial factors in effectively managing resources under limited conditions.