Use of replaceable working equipment to expand the functionality of the excavator

2021 ◽  
pp. 32-38
Author(s):  
Keyword(s):  
Economic Feasibility ◽  
Design Calculation ◽  
Frozen Ground ◽  
Frozen Soils ◽  
Existing Structures ◽  
Equipment Replacement ◽  
Rotary Mill ◽  
Scope Of Application ◽  
Urban Conditions ◽  
The City

Increasing the range of replaceable working equipment for hydraulic single-bucket excavators allows to expand the scope of application significantly, increase the efficiency of its usage, as well as the mobility of these machines. The purpose of the study is to design working equipment replacement items, used for hydraulic single-bucket excavator for digging frozen soils in the city Vladivostok. The main tasks of the study are to analyze frozen soils in the region and their existing structures, select a layout scheme for further design calculation, evaluate the economic feasibility of the proposed hydraulic excavator working equipment design replacement items, used for digging frozen soils in Vladivostok city. Keywords excavator, replacement equipment, frozen ground, urban conditions, rotary mill, vibro-ripper, hydraulic hammer, bucket-ripper, tusk-ripper, gripper-tongs working body

Жизненное состояние древесных насаждений в условиях города Актобе (Казахстан)

2017 ◽  
Vol 7 (4) ◽  
pp. 51-55
Author(s):  
S. A. Abiev ◽  
S. A. Aipeisova ◽  
N. A. Utarbaeva
Keyword(s):  
Urban Area ◽  
Woody Plants ◽  
Health State ◽  
Urban Habitats ◽  
Resistant Species ◽  
Vital State ◽  
Ulmus Laevis ◽  
Urban Conditions ◽  
The City ◽  
Trees And Shrubs

<p>The purpose of our work is to assess the health state of woody plants growing in different habitats of the city of Aktobe. We have studied the health state of arboreal and shrubby plants growing in various urban habitats; the survey was conducted during 2016-2017 by route-visual method. We performed the analysis of species diversity, abundance and density in urban area. The assessment of health state of the trees was made according to V.A. Alekseev. From your data and literature review we established that such species as Ulmus pinnato-ramosa, Acer negundo, Populus tremula, Populus nigra, and Syringa vulgaris have strong winter resistnce in the territory of Aktobe; we registered that only their apex buds and emds of the shoots were frozen in severe winters. The medium-resistant speices include Ulmus laevis and Acer platonoides. They are less plastic and suffer from late spring and early autumn frosts. The Amorpha fruticosa, Vitis vinifera, and Parthenocissus guinguefolia could be considered as the non-resistant species, since they usually freeze up to the snow cover line. The analysis of the vital state made it possible to assess the resistance to urban conditions of the majority of trees and shrubs registered in urban habitats of Aktobe. According to the preliminary data, the origin of the plant and its winter resistance are of main importance when introducing new species to urban area.</p>

scholarly journals Modeling Energy Communities with Collective Photovoltaic Self-Consumption: Synergies between a Small City and a Winery in Portugal

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 323
Author(s):  
Guilherme Pontes Luz ◽  
Rodrigo Amaro e Silva
Keyword(s):  
Economic Feasibility ◽  
Small City ◽  
Total System ◽  
Trade Offs ◽  
Southern Portugal ◽  
Energy Community ◽  
Individual Self ◽  
The Impact ◽  
The City ◽  
Modest Reduction

The recently approved regulation on Energy Communities in Europe is paving the way for new collective forms of energy consumption and production, mainly based on photovoltaics. However, energy modeling approaches that can adequately evaluate the impact of these new regulations on energy community configurations are still lacking, particularly with regards to the grid tariffs imposed on collective systems. Thus, the present work models three different energy community configurations sustained on collective photovoltaics self-consumption for a small city in southern Portugal. This energy community, which integrates the city consumers and a local winery, was modeled using the Python-based Calliope framework. Using real electricity demand data from power transformers and an actual winery, the techno-economic feasibility of each configuration was assessed. Results show that all collective arrangements can promote a higher penetration of photovoltaic capacity (up to 23%) and a modest reduction in the overall cost of electricity (up to 8%). However, there are clear trade-offs between the different pathways: more centralized configurations have 53% lower installation costs but are more sensitive to grid use costs (which can represent up to 74% of the total system costs). Moreover, key actor’s individual self-consumption rate may decrease by 10% in order to benefit the energy community as a whole.

scholarly journals Effects of preferential flow on snowmelt partitioning and groundwater recharge in frozen soils

2019 ◽  
Vol 23 (12) ◽  
pp. 5017-5031 ◽  
Author(s):  
Aaron A. Mohammed ◽  
Igor Pavlovskii ◽  
Edwin E. Cey ◽  
Masaki Hayashi
Keyword(s):  
Soil Moisture ◽  
Groundwater Recharge ◽  
Preferential Flow ◽  
Frozen Soil ◽  
Time Lags ◽  
Runoff Generation ◽  
Frozen Ground ◽  
Soil Matrix ◽  
Frozen Soils ◽  
Flow Through

Abstract. Snowmelt is a major source of groundwater recharge in cold regions. Throughout many landscapes snowmelt occurs when the ground is still frozen; thus frozen soil processes play an important role in snowmelt routing, and, by extension, the timing and magnitude of recharge. This study investigated the vadose zone dynamics governing snowmelt infiltration and groundwater recharge at three grassland sites in the Canadian Prairies over the winter and spring of 2017. The region is characterized by numerous topographic depressions where the ponding of snowmelt runoff results in focused infiltration and recharge. Water balance estimates showed infiltration was the dominant sink (35 %–85 %) of snowmelt under uplands (i.e. areas outside of depressions), even when the ground was frozen, with soil moisture responses indicating flow through the frozen layer. The refreezing of infiltrated meltwater during winter melt events enhanced runoff generation in subsequent melt events. At one site, time lags of up to 3 d between snow cover depletion on uplands and ponding in depressions demonstrated the role of a shallow subsurface transmission pathway or interflow through frozen soil in routing snowmelt from uplands to depressions. At all sites, depression-focused infiltration and recharge began before complete ground thaw and a significant portion (45 %–100 %) occurred while the ground was partially frozen. Relatively rapid infiltration rates and non-sequential soil moisture and groundwater responses, observed prior to ground thaw, indicated preferential flow through frozen soils. The preferential flow dynamics are attributed to macropore networks within the grassland soils, which allow infiltrated meltwater to bypass portions of the frozen soil matrix and facilitate both the lateral transport of meltwater between topographic positions and groundwater recharge through frozen ground. Both of these flow paths may facilitate preferential mass transport to groundwater.

scholarly journals The ecological framework as part of the land and property complex of an industrial city (on the example of an urban district of Tobolsk)

2021 ◽  
Vol 39 ◽  
pp. 01004
Author(s):  
N.V. Litvinenko ◽  
E.P. Evtushkova ◽  
Yu.E. Ogneva
Keyword(s):  
Urban Environment ◽  
Industrial Production ◽  
Ecological Framework ◽  
Urban District ◽  
Industrial City ◽  
Reconstruction Methods ◽  
Urban Conditions ◽  
The City ◽  
Property Complex

In modern urban conditions with intensive industrial production affecting the life and health of people, the authorities of many cities have thought about holding activities aimed at improving the ecological component of the urban environment. One of such activities may be the creation or improvement of the ecological framework of the city. This article discusses the features of the ecological framework in the industrial city of Tobolsk. A number of tasks that are faced by the City Administration were formulated; those must be solved using sound reconstruction methods of urban territorial and functional structures. The role of the ecological framework of the urban area is considered as the possibility of avoiding the environmental problems’ emergence and preserving the ability of the territorial system as an independent land and property complex to develop.

scholarly journals Placemaking in Arab Cities. Realities, Challenges, and Prospects

2020 ◽  
pp. 1-4
Keyword(s):  
Public Space ◽  
Place Branding ◽  
Core Component ◽  
Public Places ◽  
Challenges And Opportunities ◽  
Inclusive Approach ◽  
Distinct Sense ◽  
Urban Conditions ◽  
The City

Placemaking is an inclusive approach to the planning, design, and management of public places by which people create and/or recreate places. In the context of the Arab cities, placemaking projects are often envisaged to transform communities’ spaces into lively and attractive places; to enhance quality of life and opportunity for existing residents. It also aims to (re)create a distinct sense of place or place branding at large. Exploring how contemporary Arab cities have framed placemaking processes within the contemporary urban conditions, and sometimes the threats to the quality of the city, are helping in creating healthier, equitable, and humane public places. Such challenges and opportunities of these processes is a core component of this special edition of The Journal of Public Space, which discusses various aspects of placemaking in Arab Cities, ranges from creating, enhancing, adapting and developing attractive and efficient public places in Arab Cities. In this context, academic papers and viewpoints have manifested a variety of perspectives, theories and practices of placemaking concepts, methods, recent challenges and possible solutions. They portrayed several tools on establishing and revitalizing public places starting from governmental toolkits, reaching unplanned activities fostering community engagement in placemaking.

scholarly journals IMPACT OF CREATIVE INDUSTRIES ON THE VISUAL IMAGE OF A CITY

2019 ◽  
pp. 70-72
Author(s):  
A. M. Tormakhova
Keyword(s):  
Urban Space ◽  
Visual Image ◽  
Creative Industries ◽  
Economic Feasibility ◽  
Individual Development ◽  
Added Value ◽  
Practical Significance ◽  
City Development ◽  
Modern City ◽  
The City

The aim of the article is to highlight the specificity of visual transformations that occur in the modern urban space under the influence of the development of creative industries. The research methodology involves an interdisciplinary approach and engaging a range of cultural, sociological, and philosophical works. The works of modern foreign researchers Z.Bauman, Ch. Landry, D.Hezmondhalsh are attracted.The sphere of urban planning and the problem of creative industries are being studied. Thanks to creative industries is appears new jobs, the solution of social problems (especially in poor areas), as well as the transformation of urban space. The modern city is a reflection of the transformational processes taking place in the world. There is a change in the form of regulation of the city development policy, from the state to the municipal. There are conditions for activating creative industries that can be defined as an individual creative background, skill or talent that can create added value and jobs through the production and exploitation of intellectual property. The development of creative industries has economic feasibility, but this process is accompanied by a change in the image of the city. Urban space is the text of culture, which often combines non-interconnected components. The visual image of the modern city is repulsive and attractive, it is difficult to bring it to a single concept, but it continues to be the center of human life. Scientific novelty lies in the study of the relationship of the development of creative industries in the urban space and their impact on the visual image of the city. Practical significance is connected with the emphasis on the need to invent an individual development strategy for each city as a “creative city”, where the sphere of cultural production is leading. Promising is the direction of creative industries in a single direction and minimizing the factors influencing the negative perception of the vision of the city.

Improvement of sustainability and efficiency of urban heating using coal-water slurry fuel

2021 ◽  
Vol 3 ◽  
pp. 18-22
Author(s):  
Vasily Murko ◽  
Oksana Chernikova
Keyword(s):  
Heat Generation ◽  
Cost Efficiency ◽  
Coal Slurry ◽  
Coal Burning ◽  
Equipment Replacement ◽  
Water Slurry ◽  
Coal Water Slurry ◽  
New Construction ◽  
Cost Efficient ◽  
The City

Coal-water slurry fuel is coming into use in heat generation facilities as an alternative to natural gas and heavy oil. The main advantage of coal slurry is its cost efficiency. Our project is devoted to improvement of heat generation using coal-water slurry fuel instead of investing in new construction of coal-burning boiler houses. As an example, we considered implementing this project in the city of Leninsk-Kuznetsky, Russia. The project implies partial burning of coal slurry along with conventional coal burning. This solution is cost efficient and environmentally friendly yet not requiring major heat generation equipment replacement or renovation. The total cost efficiency of the suggested project is estimated at least as 1.1 billion rubles per year.

City Profile: Manila, Philippines

2019 ◽  
Vol 10 (2) ◽  
pp. 331-358
Author(s):  
Mark Anthony M. Gamboa ◽  
Ryan Randle B. Rivera ◽  
Mario R. Delos Reyes
Keyword(s):  
Sustainable Development ◽  
Best Practices ◽  
Sustainable Development Goals ◽  
Global Scale ◽  
The Philippines ◽  
Government Agencies ◽  
Significant Implication ◽  
Development Goals ◽  
Urban Conditions ◽  
The City

Manila is a primate city with national and international significance. Unlike any other city in the Philippines, Manila has the mandate of serving not just its local constituents, but also a clientele of national and even global scale. Recognizing that the localization of Sustainable Development Goals (SDGs) at sub-national levels is a key element in meeting the targets by 2030, it is important to look at how cities have been confronting local challenges relating to the development goals. Focusing on SDGs 3, 4 and 11, this city profile shows that Manila has performed reasonably well against key national and regional benchmarks on health, education and urban sustainability. However, as the city continues to lag behind many of its regional counterparts, key reforms must be undertaken in the areas of local policymaking, targeting of resources, scale of public participation and engagement of national government agencies. Heading into the first four years of the SDGs, the aim of this profile is to recognize and contextualize Manila’s existing urban conditions, best practices and pressing challenges—which would all have a significant implication on how Manila stands to attain SDGs 3, 4 and 11.

scholarly journals STUDI KELAYAKAN EKONOMI PEMBANGUNAN UNDERPASS PADA SIMPANG JL. GATOT SUBROTO-JL. AHMAD YANI DI KOTA DENPASAR

1970 ◽  
Vol 4 (1) ◽  
Author(s):  
Lina Sarasdevi Santosa ◽  
P. Alit Suthanaya ◽  
I B. Rai Adnyana
Keyword(s):  
Interest Rates ◽  
Net Present Value ◽  
Secondary Data ◽  
Economic Feasibility ◽  
City Government ◽  
Primary Data ◽  
Cost Ratio ◽  
Benefit Cost Ratio ◽  
Direct Benefits ◽  
The City

Abstract : Based on data from the Central Statistics Agency (BPS) of Bali in 2013, the population density in the Metropolitan area SARBAGITA (Denpasar-Badung-Gianyar-Tabanan) was 1.057 inhabitants/km2 with an area of 1.753,63 km2 and population was 1.853.017 inhabitants. Availability of facilities and adequate transportation infrastructure is needed, but in fact the performance of roads in the city center has declined. It is characterized by an increase in travel delay problem. Traffic delay problems in the City of Denpasar commonly occur on the stretch of Gatot Subroto street. To minimize the existing problems, Denpasar City Government plans to develop an underpass at the intersection of Gatot Subroto street and Ahmad Yani street. The aim of this study was to analyze the direct benefits of underpass for road users, to analyze the costs necessary to realize and operate the underpass, and to analyze the economic feasibility of the underpass development investment. Based on primary data and secondary data were obtained from government agencies, the method of analysis in this study used the technique of Net Present Value (NPV), Benefit Cost Ratio (BCR) and Internal Rate of Return (IRR). Economic analysis conducted in this study used three criteria (NPV, BCR and IRR) with three interest rates (12%, 15% and 18% per year) stating that the construction of an underpass was economically feasible. For example in the second scenario where the interest rate 15% gain on the analysis of value NPV, BCR and IRR respectively is Rp. 233.462.340.102,00; 1,948 and 30,81%. Suggestions can be submitted from this research is the need to contemplate the effect of changes in land use in areas close to the area around the underpass and needed further study that takes into account the needs of additional traffic lanes.

Sign in / Sign up

Export Citation Format

Share Document