bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dynamics Of Land Value Change : A Case Of Pantai Mutiara, Jakarta
Authors: Loi Juntrisnawati , Tresani Nurahma , Mahmud Nasiruddin 
Published: July 2020

Abstract
City continues to experience physical development as indicated by the increasing number of built up areas and increasing land requirements. Physically, land is an asset that has limitations and cannot grow, for example through reclamation efforts. Land is not only a wealth-creating resource for sustenance but also the basic resource requirement for all development. Pantai Mutiara area is a coastal reclamation area intended for residential functions. The development of the Pantai Mutiara Area reclamation project from the beginning of the development to the present has had an impact on the increase in the land value in the area, especially the land value that has marinas and docks. The dynamics of land values changes are still unpredictable especially because the determinants of land value itself are not just something real like accessibility, location, etc., but there are also determinants of land value such as macroeconomic conditions (gross domestic product, economic growth, Indonesian Rupiah exchange rates and currency conversion).
Smart Chicken Farming: Monitoring System for Temperature, Ammonia Levels, Feed in Chicken Farms
Authors: Budiarto Raden , Kholis Gunawan Nur , Ari Nugroho Bagas 
Published: July 2020

Abstract
In this study, embedded system technology was implemented in the supervision system of chicken farms. This system works by utilizing sensors that are used to collect data on temperatures, ammonia levels, chicken food in the chicken coop. The method used in this study consisted of three stages. The first stage is a literature study on problems that often occur in chicken farms. The second step is to make observations directly to the farm to get more information. Then proceed with the implementation and testing. The research data were collected through observations and interviews with breeders on chicken farms, Bogor district. The results of the study show that the system can monitor ammonia levels, chicken food weight, and room temperature. The farmer can easily monitor the condition of chicken farms and get SMS notifications on situations that need to be dealt with immediately. The research data were collected through observations and interviews with breeders on chicken farms, Bogor district. The results of the study show that the system can monitor ammonia levels, chicken food weight, and room temperature.
The concept of creating a new water management system in the region
Authors: Rakhmatov N , Maksudova L , Jamolov F , Ashirov B , Tajieva D 
Published: July 2020

Abstract
The article gives the reason for the formation of Lake Aydarkul, according to which Lake Aydarkul began to form, starting from the catastrophically high year of 1969 - as a result of the discharge of 21 cubic kilometers of Syrdarya waters from the Shardara reservoir. The area of the lake system reached 2000 km2, salinity of water – 2 – 4 g/l. In the next decade, there was a drop in the water level in the lakes and deterioration in its quality. By 1978, the depth decreased from 25 to 20 meters, and salinity increased to 7-8 g/l. An analysis of the available materials devoted to this problem showed that the water surface of Aydar and Tuzkan lakes extends from west to east for more than 180 kilometers, and the adjacent chain of Arnasay lakes stretches from north to south for more than 70 kilometers. The reason for the salinity of Aydarkul was indicated - before the commissioning of the Shardara reservoir, salt lakes were located on the site of the lakes, and only in the Tuzkan Basin fed by the Kly River was a shallow salt lake. The problem can be solved by transporting an additional volume of water to the lower reaches of the Amudarya, which will improve the ecological situation in the Aral Sea region, provide, over time, the formation of fresh lakes and create a water management system Syrdarya - Aydarkul - Zarafshan - dead lakes - Amudarya. This system can serve the broad development of fisheries, and also contribute to the opening of new agricultural areas of the republic, while creating several hundred new jobs. A method is recommended for solving an important national economic task of the industry. It is proposed that for the formation of the water system Syrdarya – Aydarkul - Zarafshan - “dead lakes” – Amudarya – Priaralye, it is necessary to design and build the main canal with several sections of a length of about 250 km, each of which communicates with the lake of the above system, will provide gravity communication of three large rivers of the Aral Sea basin. It is proposed to design the main canal with improved lining, which will provide high efficiency, which, in turn, will reduce the filtration coefficient and contribute to an increase in water intake for the needs of the national economy, expansion of irrigated areas and the development of fisheries in the region, and improvement of the ecological situation in the Aral Sea region.
Risk management of construction
Authors: Saidova M , Xodjimuxamedova Sh , Uktamov K 
Published: July 2020

Abstract
The role of financial risk management in increasing the financial stability of a construction company and reducing the likelihood of losses related to non-core risks is very large. The ability to identify and assess risks, as well as understand how possible adverse events can affect the final financial result, increases the manageability of the company’s asset portfolio and the predictability of the financial results of its business activities.
Any company is exposed to business risks. Its incomes may rise or fall depending on changes in the environment, competition, production function, due to the emergence of new technologies, or changes in factors affecting consumer preferences. It should be noted that in Uzbekistan, unfortunately, financial risk management has not yet begun to play that significant role in the field of developing management decisions that it plays in the West. Due to historical circumstances, the development of financial risk management began in our country later than in the West, in fact, like the Uzbek business itself.
An important role is played by the fact that the risk management system cannot simply be copied from a Western standard and imposed on Uzbek companies. There is no doubt that risk management in our country is not just different, but also must be different from risk management in Western companies due to the Uzbek specificity. And this is not only about the liquidity of foreign exchange markets, but also about the needs to design an Uzbek risk management model with the possible use of existing tools and taking into account the experience of Western companies.
The purpose of this article is to develop recommendations on risk management in times of crisis for construction companies.
The results obtained from the research can be implemented in the activities of construction companies and used in educational methods.
The dynamics of channel processes in the area of damless water intake
Authors: Isabaev K , Berdiev M , Norkulov B , Tajieva D , Akhmadi M 
Published: July 2020

Abstract
The paper analyzes the dynamics of channel processes in the Amudarya River section in the area of water intake in the Karshi Main Channel (Karshi region). The results of field studies of the state of the Riverbed environment of the Amudarya River in the area of damless water intake were studied. The course of channel processes in the River bed is studied. A recommendation has been developed to improve the water intake condition. According to the results of a field examination and research of the head section of the supply channel. The state of the River channel Amudarya in the water intake zone was assessed. The results of surveys of the hydraulic and alluvial regimes of sediments of the Amudarya River in the area ofdamless water intake are analyzed and summarized. The results of field studies of the Riverbed environment of the Amudarya River in the region of the Karshi head water intake were studied.
Field target dimensions of flow constrained by a transverse dam
Authors: Bakiev M , Yakubov K , Choriev J 
Published: July 2020

Abstract
Construction and operation of channel control structures in valley rivers require carrying out a comparative study of their operation during design operational periods. The goal of this work is to set target dimensions for flow deformed by the transverse blind dam in field conditions, on the dam № 30 in Amudarya river: the length of upstream and downstream vortex zones, boundaries between the core and intensive turbulent mixing zones, vortex zone boundaries, and their comparison with experimental data. Locations of the sections are set based on the possibility to accomplish the goal, in the headrace, where flow natural condition is maintained, in contraction zone, and within the borders of downstream vortex zone. Sections were fixed with landmarks and leveling instrument Vegal 24 was installed there. Zone boundaries and vortex lengths were set with the use of floats directly from the riverside of the use of boats. Design relationships obtained from the results of laboratory experiments were used to determine the length of upstream vortex zone, contraction area, downstream vortex zone, boundaries of hydraulically homogeneous zones, which were then compared with the field data. It was also set, that coefficients characterized flow spreading beyond the contracted section were equal to C

2
=0.186 and C

3
=0.545 as compared to 0.11 and 0.16 in the theory of turbulent jets. The length of vortex zones is shorter by 11.9% to 26.8%, which shows how much the distance between dams must be decreased in the system.
On the establishment of the correlation dependence of results of physical properties, dynamic probing and filtration coefficient from the granulometric composition of alluvial sands in the valley of the Amudarya river
Authors: Yusupov G , Ruziev I , Nurjanov S 
Published: July 2020

Abstract
Based on the study of the mechanical composition and physical properties of alluvial sands, the correlation equation necessary for engineering and geological studies to analyze the lithological conditions of the soils, the average physical properties of the Amudarya river and soils, and the average number of strokes per 1 dm immersion probe are studied. Quantities of definitions are represented in large numbers. The study of the physical properties of the sand of both terraces is complicated by the very close occurrence of the groundwater level. Above and near the groundwater level, physical properties were studied in pits, some of which were drilled. Samples of undisturbed sand were taken with a 700 cm3 cutting cylinder. The volumetric weight of the skeleton of both terraces in natural addition is the same for species with the same particle size distribution (1.30-1.50 g / cm3). The geological structure was studied in wells that were drilled by a rope method. Samples were taken from these wells to determine the particle size distribution of the sand. The mineral composition of sand and clay determines the nature of their resistance to shear, and clay soils are characterized by resistance to uniaxial compression and rupture.
Non-stationary filtration through a homogeneous rectangular closing dike
Authors: Zaborova D , Musorina T , Petritchenko M 
Published: July 2020

Abstract
A hydraulic structure is an object for the use of water resources, as well as for combating the harmful effects of water. Knowledge of the main parameters of the filtration flow is necessary for solving problems related to the design and operation of hydraulic structures. The article considers filtration calculations of a homogeneous closing dike, which is: determination of instantaneous filtration flow rate and seepage area. It is proved that when the length of the closing dike increases, the height of the seepage area monotonically decreases; the depression curve is constructed; critical time value after which the flow rate takes a constant value equal to the Dupuis flow rate is found.
Experimental studies of horizontal flow effects in the presence of cavitation on erosion – free dampers
Authors: Obidov B , Choriev R , Vokhidov O , Rajabov M 
Published: July 2020

Abstract
Based on cavitation studies, the obtained graphical dependencies for determining the horizontal hydrodynamic effect of the cavitating flow on erosion-free dampers at various stages of cavitation. These data supplement the results obtained earlier. Based on studies, the effect of cavitation on the work of erosion-free dampers was revealed. So, on average, horizontal ripple loads in the zone of the developed stage of cavitation increase by 1.7…2 times. Such a significant increase in loads necessitates taking into account the influence of cavitation when designing the downstream fastening plates with erosion-free dampers. The values of the horizontal hydrodynamic loads on the erosion-free dampers given in the work make it possible to establish the shear loads on the slabs of the water cube under cavitation. The results of this work can be used in design practice to assess the stability of slabs of waterfall fasteners with cavitating erosion-free dampers.
Bilateral contraction of flow by blind dams on easily erodible soils
Authors: Ibrayimov A , Kadirov O 
Published: July 2020

Abstract
In various parts of the Amudarya river, transverse dams are built for channel control and to protect riverbank from scouring. Studies were carried out in CAIRI laboratory to study the hydraulics of flow near structures (dams) on both sides of the channel, specifically spreading patterns of flow overtopping and its erosive capacity. Experiments carried out on 20m x 2m erodible model for discharge values Q = 10.0, 20.0, 30.0 l/sec, contraction degree of n = B/(B-b

0

) = 0.33, 0.5, 0.67 and with the installation angle with respect to the streambank α = 60°, 90°, 120° gave specific results. Based on theoretical and experimental studies, relationships were obtained, which allow establishing the boundaries for flow division, velocity distribution along the width and length of flow, vortex length, distances between structures, as well as the values for backflow velocities along the streambanks, that can be used to construct velocity field in the dam impact zone. The obtained methods allow to get the full picture of a flow spreading beyond dams at the presence of backflow.
Shape parameters of the transverse cross-section of river beds
Authors: Maalem N , Kadirov O 
Published: July 2020

AbstractThe construction of hydrotechnical structures on rivers will require the establishment of the planned dimensions of sustainable supply and discharge rivers. The main goal of this work is to determine the parameters of a stable cross-sectional shape of the river channels of Algeria. The problem was solved using hydromorphological and probabilistic-static methods for determining the parameters of stable channels. Hydromorphological dependencies were established for tens of Algerian rivers between the relative width and water discharge and mainly feedback. Using the probabilistic-static method, the static parameters of the alignment curves were calculated (Sidi Bel Atar of the Shelef Riverβ0= 58.7, CV = 0.184, ξ = 5, CS = 0.92,and also forβ0= 30.44, CV = 0.295, ξ = 4, CS = 1.18.A comparison is made of the theoretical binomial security curve with the actually measured data and which are well approximated. An example of calculation by the proposed method for a specific alignment of the Algerian Shelef river is performed.
Geometric modeling of underground water deposits
Authors: Qosimov J 
Published: July 2020

Abstract
The article considers one of the important problems of modern applied geometry - the development of geometric modeling methods, typification and schematization of topographic, hydrogeological, and geological surfaces, on the basis of which many theoretical and applied problems of engineering geometry are solved. The results of observations of groundwater status indicators are analyzed, which are carried out by measuring the level, pressure, flow, and selection of water from observation wells, springs located in natural and disturbed conditions. The permissible convergence of resource estimates by the amplitudes of fluctuations in the level of groundwater and by the geometric modeling of groundwater deposits has been established.
Characteristics of Relative Growth for HPP Power Systems of Tajikistan
Authors: Kirgizov A , Sultonov Sh , Johnonov M , Usmonov Kh , Tolibzoda I 
Published: July 2020

Abstract
The article discusses the main criteria for optimizing the operational modes of a hydropower power plant in terms of active power. Relative growth characteristics are used to calculate the distribution of active power between stations for more rational use of water resources.
Also, this method allows to optimally distributing the load between the units of one station. Basically, the characteristic of the relative increase in the load of the units depends on the operational characteristics of the hydraulic turbines. The article provides calculations of the relative increase in load at the Nurek hydropower power plant.
Modeling and analysis of a reactive low-pressure hydraulic turbine
Authors: Kodirov D , Tursunov O 
Published: July 2020

Abstract
This work is devoted to the development of a low-pressure reactive micro-hydroelectric power plant that operates independently from the general power supply. Impellers of a reactive hydro turbine proposed for a micro-hydroelectric power station includes a curved confusor nozzle. In this design, the cavitation effect practically does not affect the impeller system. In the turbine, the above-mentioned drawbacks of the existing turbines are minimized. The results of theoretical calculations and tables, graphical dependencies of an experimental reactive micro-hydroelectric power station are presented.
Assessment of land degradation changes in mountain areas in Tashkent province
Authors: Pulatov B , Umarova Sh , Alikhanov B 
Published: July 2020

Abstract
Analyzing the trend of land degradation changes and its cause and consequence in the mountain ecosystem is a matter of concern for sustainable development. It’s important to know that only 10% of the world’s population in rural areas depends directly on natural resources for their livelihood and 40% depends indirectly, i.e. water, biodiversity, and ecosystem. This study focuses on the assessment of land degradation changes in mountain areas of Tashkent province using GIS techniques. The study area is located lowland in the western part of the Tian Shan mountains. The results show that overgrazing significantly affects the mountain ecosystem, which decreased up to 29 thousand ha of pasture land over ten years between 1989-1998. However, changes during 2008-2018 show a significant rise in the pasture area, ending with 45 thousand ha of land. In conclusion, during last decades in Uzbekistan rehabilitation achievements be due to (i) complex measures taken by government and ecologists, who clearly recognized that if the previous scenario will continue, the ecosystem of high altitude areas could be irreversibly damaged; (ii) cutting trees from a forest which leads to decrease forest area and increase pasture area.
Exchange of salt and moisture in the underground water management
Authors: Khojiyev A , Muradov R , Khaydarov T , Pulatov J 
Published: July 2020

Abstract
Water – as moisture, has an essential role in all biochemical processes of plants, all vital processes, occurring in a vegetative organism, can proceed normally only under the condition of sufficient saturation of cages by moisture. Results of theoretical researches on dynamics of ground humidity have shown: (1) similarity of physical processes of change of humidity of soil on different irrigated areas. (2) hysteresis of the nature of humidity at irrigation and drainage. (3) the sharp recession of humidity of soil in the root zone. The developed models (33) - (34) can be used in the calculation of moisture and salt transfer both in the initial period of plant development and in the calculation of washing of saline lands. The use of models and the coefficients of the mathematical model to determine the parameters of moisture and salt transfer make it possible to calculate the reserve of soil moisture and optimize the sowing time at its maximum value.
Optimal solution leaching rates with a deficit of irrigation water
Authors: Khojiyev A , Khaydarov T , Rajabov N , Pulatov J 
Published: July 2020

Abstract
The growing demand for water resources is associated with many natural and anthropogenic factors: diversification of the economy, growth of water supply and requirements, construction of hydropower complexes, problems with managing the transboundary rivers waters, restoration of the ecology of the Aral Sea region and others. Now, much attention is paid to the distribution of irrigation water during the growing season including the introduction of drip and spring irrigation systems, irrigation pipelines, etc. But, unfortunately, attention remains to the issues of effective salt leaching management the land to the extent of soil salinity, crop variety, the composition of salts, and salinity. In this paper, the authors attempt to solve this problem.
Protection of recovery projects and developed areas from flooding
Authors: Sherov A , Soliev B 
Published: July 2020

Abstract
The article discusses the formulation and solution of scientific, theoretical, and practical problems in the field of land reclamation of irrigated lands in general and, in particular, the protection of land reclamation facilities and the territory of cities and settlements from the effects of groundwater. In the Aral Sea basin, due to the intensive commissioning of new irrigated areas and various types of hydraulic structures (reservoir, village storage, canals, etc.), on a large scale, there is a violation of the natural laws of the regime and balance of groundwater. As a result of the hydrotechnical impact on water resources, the usual “losses” affecting the water balance and runoff, in the initial stage of their formation, cause processes such as flooding and flooding of adjacent territories, excessive wetting of non-irrigated lands and worsen the operation of reclamation projects. The open collector-drainage network existing around the land reclamation projects and cities does not provide a normal outflow of groundwater; its maintenance into a working and sanitary state requires large capital expenditures. High groundwater level with high salinity leads to the destruction of the basement of buildings and structures, the complete flooding of groundwater communications, the death of green spaces. According to some available data, losses incurred from exposure to aggressive groundwater in a number of cities in Uzbekistan range from 2.5 to 10 million dollars. The objects of reclamation control are established depending on the main factor determining the reclamation state of irrigated lands, on the degree of their natural drained. Essential criteria for determining the relationship of groundwater with soil – soils and their influence on the reclamation state of irrigated lands are the depth of groundwater table and the degree of mineralization, as well as their seasonal and long-term regime. The presented dissertation is devoted to the study of this insufficiently solved problem. Scientific and technical solutions to this problem are considered on the example of the built-up areas of irrigated areas of the Republic of Uzbekistan, where there are problems of engineering protection from the negative effects of groundwater.