bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental analysis of the performance characteristic of an eco-friendly HC600a as a retrofitting refrigerant in a thermal system
Authors: Banjo S.O. , Bolaji B.O. , Osagie I. , Fayomi O.S.I. , Fakehinde O.B. , Olayiwola P.S. , Oyedepo S.O. , Udoye N. E.
Published: December 2019

The negative influence of refrigerants on the climate and the immediate environment in terms of their higher global warming potential (GWP) and ozone depletion potential (ODP) has prompted this study. Currently, natural refrigerants are the preferred alternative refrigerants and hydrocarbon is numbered among these natural refrigerants with zero ODP and negligible GWP. In order to improve and enhance the performance of the refrigeration system, the performance characteristics of the system were investigated experimentally using eco-friendly refrigerant HC600a as alternative to HFC134a. In addition, comparisons were made using refrigerant mass charge of 46 g of isobutane (HC600a) and 70 g of conventional refrigerant (HFC134a). Thermodynamic parametric analysis was conducted using electric power consumption, coefficient of performance (COP), cooling load and pull-down time (PDT) for the used mass charges. REFPROP software was applied to capture the thermodynamic properties of the vapour compression system (VCS). The results showed that the COP increased by 32.2 % when using 46g charge of hydrocarbon refrigerant with energy reduction of 4.5 %. Furthermore, the vapour compression system while using 46 g of isobutane (HC600a) attained an evaporating temperature of -21 °C in 60 minutes while 70 g of HFC134a attained the same temperature in 2 hours 15 minutes, which makes HC600a alternative refrigerant to run in the traditional refrigerator.
Elucidation of phase equilibria in quinary system composed of lithium, sodium, and potassium cations along with sulfate and tetraborate anions at 0°C
Authors: Tursunbadalov Sherali
Published: December 2019

The results of determination of phase equilibria in quinary system which is composed of lithium, sodium, and potassium cations along with sulfate and tetraborate anions at 0°C by translation method were discussed. Six invariant points, eighteen monovaraint curves, nineteen divariant fields and eight trivariant volumes were observed in this system. The total phase equilibria diagram of the system was fragmented into divariant cocrystallization fields of two solid phases and trivariant crystallization volumes of individual solid phases. The extracted crystallization volumes from total diagram reflect the structures of projected Janecke diagrams of the system saturated with the solid phases. The obtained results agree well with available experimental results and comprehensively clarify the reciprocal relations of phases in the system.
A sustainable ubiquitous engagement platform for open government Implementation.
Authors: Goddy-Worlu R. N. , Ayo C. K. , Geteloma V. O.
Published: December 2019

Open government is known as a systematic procedure of government towards ensuring collaboration, transparency, innovation and participation to make government answerable to its citizens. It has been identified to have four stages of implementation with a given conceptual model known as the open government implementation model (OGIM). The first stage of the model is increasing data transparency, the second stage is improving open participation, the third stage is enhancing open collaboration and the fourth and final stage is realizing ubiquitous engagement. Each stage of this model provides its own deliverables from the first stage down to the last however, this paper focuses on the specific final stage of the model which is realizing ubiquitous engagement. In order to realize ubiquitous engagement, a platform for citizen engagement needs to be made available everywhere and at any time. The paper is aimed at proposing a sustainable engagement framework for open government as well as using the adopted framework for the design of an n-tier application architecture for citizen’s engagement. The ubiquitous engagement platform is a mobile platform which provides a suitable avenue for active citizen participation in government policies and procedures. It is a one-stop application enabling government transparency and effective citizen communication. With the introduction of the platform, it bridges the communication gap between the citizens and government. Thereby enabling citizen’s participation to enabled at available at any time and at anyplace via a reliable platform. The platform also enables government transparency and trust in government.
Corrosion Performance and Surface Analyses of Laser Cladded Zn-Ni-Fe Coatings on ASTM A29 Steel.
Authors: Akinlabi E. T. , Fatoba O.S. , Akinlabi S. A. , Mwema F. M.
Published: December 2019

The corrosion behaviour of the laser coatings was investigated in 3.65 % sodium chloride solutions at 30°C via potentiodynamic polarization technique. The composition of Zn-50Ni-5Fe at parameters 900 W and 1.2 m/min exhibited enhanced electrochemical performance in 3.65wt.% NaCl solution. Microstructures with unique characteristics and refinement of grain size were observed. The fast solidification of the coating is accounted for this unique features. In terms of corrosion performance, results revealed that increasing the laser scanning speed was beneficial to the property, showing that the corrosion performance became better at higher scanning speeds. At the set laser intensity of 900 W and increased laser velocity, Zn-50Ni-5Fe coatings showed enhanced microstructure. The multiple tracks applied in the direct laser metal deposition (DLMD) process had resulting fields of residual stresses which attributed to the solid-state phase transformation that was a repeated process. The study validated the reliability of optimizing DMLD set parameters for metallurgical and mechanical considerations. These bring improvements in coatings which were laser cladded in terms of their corrosion performance and the dimensional accuracy, by optimizing the processing parameters. The only processing parameters which were varied was the laser intensity and the scanning speed, which were employed to numerically design the DLMD experiment. An empirical method was also developed and was used to validate the results achieved experimentally. The Grey relational model (GRM) used in this research described vividly the influence of optimized factors on the improved corrosion resistance and compared reasonably with the experimental results. In addition, the proposed model has the potential to provide induced corrosion rate predictions of coatings fabrication that are additively manufactured.
Silicon Nitride-based Ceramic Material as a Reinforcement with Corrosion Resistance Properties in High Grade Aluminium (AA8011) Metal Matrix Composites
Authors: Fayomi J. , Popoola A.P.I. , Popoola O.M. , Fayomi O.S.I.
Published: December 2019

The impact of silicon nitride particulates as a ceramic reinforcement material on the corrosion mitigation of AA8011 in 0.5 M H2SO4was Experimented with potentiodynamic polarization technique, and the microstructural evolution was keenly observed with TESCAN scanning electron microscope (SEM). The findings from the research show the enhancement in the corrosion performance of the developed composites in relation with the unreinforced AA8011 alloy. The corrosion rate was observed to decrease drastically at higher percentage reinforcement of 20% Si3N4with 66.78% efficiency. The scanning electron micrographs present a pitting form of corrosion, the pit was seen to be more pronounced in the unreinforced alloy than the developed composites.
Review of Atomic Layer Deposition of Nanostructured Solar Cells 4
Authors: Ukoba O.K. , Jen T-C.
Published: December 2019

This study reviews atomic layer deposition technique with a special interest on solar cells applications. Atomic layer deposition is a vapour phase deposition technique used for producing thin films for several applications. This review focuses on the chemistry of Atomic Layer Deposition of solar cells, merits and demerits of ALD on thin film solar cells. Solar cells have attracted a lot of interest due to their potential for affordable, clean and sustainable energy. Solar cells can be deposited using different deposition techniques but Atomic layer deposition currently attracts attention owing to the merits. ALD has functional merit to bulk materials, great processing flexibility and affordability. The review examined the merits of ALD and solar cells and areas for future study. It offers affordability, ease of control of film growth, conformal and improvement on the deposition of solar cells. Despite few demerits, ALD is poised to be the deposition technique of choice for modifying interfaces of the film for improved performance.
Review on The Energy and Exergy Analysis of Vapour Compression Refrigeration System Using Nanolubricant
Authors: Ogbonnaya Mercy , Ajayi Oluseyi O. , Waheed M.A , Oyedepo Sunday O.
Published: December 2019

The vapour compression refrigeration system (VCRS) is an energy system used for preservation and cooling of household, agricultural and industrial products but the energy consumption of the system is high globally. With this challenge, the need to reduce the energy consumed and enhance its performance becomes eminent. The thermal conductivity of heat transfer fluids plays a significant role in the heat transfer characteristics of the fluid and the overall performance of an energy system. The low thermal conductivity of refrigerant can be enhanced by dispersing nanoparticles into the refrigerant. The use of nano refrigerant or nano lubricant has been found to be useful in the reduction of energy consumption and enhancement of the VCRS performance. This review discusses the energy and exergy performance of the VCRS with the aim of identifying some critical factors that affects the performance optimization and exergy destruction within the system.
Macroeconomic as Basis of Economic Growth : An ARDL Approach
Authors: Oluwafemi I.J. , Laseinde O. T.
Published: December 2019

We examined the effect of some selected macroeconomic factors reflecting on Nigeria economic growth between the periods of the year 1981 to the year 2015 using Auto Regressive Distributed Lag denoted as ARDL method. Findings revealed that foreign direct investment, and trade openness were the major factors that determine real gross domestic product, especially in the short run. On this basis, this paper, therefore, concluded that increase in the net flow from foreign investors from the rest of the world has a significant effect on the Nigeria economy as it increases the capital inflow and improves economic growth.
Evaluation of sustainability concepts in public housing projects in ogun state, nigeria.
Authors: Chiamaka Ukwunna , Aduwo Egidario B.
Published: December 2019

The issues associated with housing are colossal and multifaceted, displaying clear and concise differences in various parts of the world. As is the case of most urban environments, the problem of housing can no longer be limited to the quantity of houses available, it should also include the quality and the location of these housing units. As a result, this study intends to assess the different sustainability concepts adopted in the planning, design and construction of public Housing in Ogun State. The objectives of the study were to, evaluate the physical characteristics and conditions of the housing units, examine the socio-economic characteristics of the residents, and determine factors which affect the level of satisfaction of the residents. 274 housing units were assessed, from four public housing estates in the state, between the months of December, 2018 and February, 2019. Data was gathered by administration of questionnaires as well as interviews to household heads. The data was analyzed using descriptive and inferential techniques. The result of study highlighted that the housing estates were assessed to be sustainable as regards the housing density of the units and the affordability levels, however the estates were deemed unsustainable based on type of building materials used, proximity to basic amenities, and non-existence of communal facilities. The study concluded that relevant agencies as regards housing in the state, should focus on the provision and maintenance of public facilities so as to improve resident’s satisfaction and also make use of adaptable spaces when designing houses, so as to cater for unexpected growth in the family and improve quality of life of the occupants.
Production and Characterization of Partially Purified α-amylase from Aspergillus niger
Authors: Atolagbe Oluwabunmi M , Ajayi Adesola A , Olasehinde Grace I
Published: December 2019

Alpha amylase is a class of amylases that aid in the breakdown of internal α-1, 4-glycosidic linkages in starch. They are important in various pharmaceutical, food, brewing, paper, chemical and textile industries. The aim of this work was to produce and characterize α-amylase produced by A. niger. A. niger was used to produced alpha amylase in a basal salt medium which was then purified with activated carbon. The effect of pH, temperature, substrate concentration and heat on the produced amylase was investigated. The highest activity of the enzyme was recorded at 40 °C and pH 6.0. The apparent Km value for the enzymic hydrolysis of starch was 0.13mg/ml. Heating at 70 °C greatly affected the activity of the enzyme losing up to 35% of its activity after 5 mins. Physical conditions of heat, pH and concentration of substrate are significant factors which should which affect the activity of enzymes.
Performance Evaluation of Hydrocarbon based Nanorefrigerants Subjected to Periodic Door Openings
Authors: Okotie T. E. , Adelekan D. S. , Ohunakin O. S. , Gill J. , Atiba O. E. , Atayero A. A.
Published: December 2019

Domestic refrigerators are required to be energy efficient and environmentally safe. In this work, a slightly modified domestic refrigeration system was infused with various concentrations (0, 0.2, 0.4 and 0.6 g/L) of TiO2 nanolubricants and R600a refrigerant with a mass charge of 40g. The average energetic characteristics of the test rig at different door openings intervals (0.5, 1, 2, 3 and 5 minutes) were evaluated. The energetic characteristics studied were coefficient of performance (COP), refrigeration capacity, power consumption and cabinet temperature recovery time. The results obtained showed that the use of nanolubricants significantly affect the energetic performance characteristics of the system. Overall, the utilization of 0.6g/L concentration of TiO2 nanolubricant gave the best performance. The COP of the system improved by 22.39 %, while the power consumption decreased by 23.5 % when compared with pure R600a refrigerant.
Mitigating biodiversity destruction through environmental impacts assessment of infrastructural projects
Authors: Ugwu E I , Ekeleme A C , Okolie S TA , Ibe O P , Chieke C F , Ibearugbelem H O , Omeje M , Awoyera P O , Ede A N
Published: December 2019

The geometric rate of biodiversity loss in developing countries like Nigeria has been identified as a problem of major concern. The loss in biodiversity in modern times is evident in the extinction of many plants and animal species. In developing countries like Nigeria, more attention is given to aesthetics, functionality as well as the cost of proposed projects than the environmental impacts of the projects. During construction and rehabilitation of infrastructural projects, biodiversity is destroyed. Thus, this study was aimed at exploring the various ways by which infrastructural projects affect biodiversity, with a view to proffering ways of its restoration. The negative effects of infrastructural projects on biodiversity can be reduced through Environmental impact Assessment (EIA). This will help in averting the detrimental effects on natural resources. In situations, where natural habitat loss is unavoidable, adequate mitigation measures such as provision of strict protection zones along the proposed projects should be adopted. In order to meet sustainable development goal, EIA should be carried out before projects that may have a negative impact on the environment are constructed.
“Crude distillation overhead system”: Corrosion and Control.
Authors: Fajobi M.A. , Loto R.T. , Oluwole O.O.
Published: December 2019

Corrosion problem has been a major challenge in the crude distillation overhead system of the petrochemical industry. It affects every part of the metallic structures of the crude distillation overhead system due to contaminants from crude oil. As a result of this, lots of revenue are been incurred to tackle it. This review therefore discussed the definition of a crude distillation overhead system, its working principle, the structural material for constructing crude distillation overhead system, the types of corrosion that occurs in crude distillation overhead system, the economic cost, the prevention and control methods employed in crude distillation overhead system. Also, the review showed that materials used for crude distillation overhead system, such as carbon steels, are mostly affected by pitting corrosion, intergranular corrosion and general corrosion. In addition, the review showed that the use of material selection, inhibitors, protective coating and cathodic protection are the common prevention and control methods usually employed in crude distillation overheard system. However, the review stated that the use of inhibitor is the most trusted and time tested as the proven method of prevention and control in crude distillation overhead system. This will help to reduce the huge economic cost incurred on corrosion effect in petrochemical industry, especially in the crude distillation overhead system.
A Study on the Corrosion Inhibition Effect of Hexamethylene Tetramine on Welded API 5L X70 Steel in E10 Fuel Ethanol Environment
Authors: Joseph O. O. , Babaremu K. O. , Adeniyi J. A.
Published: December 2019

The inhibition effect of hexamethylenetetramine (HT) in E10 environment for the corrosion protection of welded API 5L X70 pipeline steel was examined using immersion tests. Welded samples of API-5L X70 steel of dimension 30 mm x 15 mm were immersed into E-10 fuel ethanol containing hexamethylenetetramine concentration of (0.2, 0.4, 0.6, 0.8) g and the control for a minimum of 4 days and a maximum of 28 days. Analysis was done using mass loss, corrosion rate, inhibitor efficiency and ANOVA test. From the mass loss and corrosion rate analysis, it was observed that 0.2g HT, which was the lowest concentration of inhibitor, proved best for inhibiting corrosion at 24 days.
Moment model of an uniformly magnetized permanent magnet based on point sources of the field
Authors: Bakhvalov Y A , Grechikhin V V
Published: December 2019

Permanent magnets are widely used in various technical devices. Mathematical models of magnetic fields of permanent magnets are considered to solve the problems of analysis and synthesis of such devices. The paper proposes a third model, based on the use of point sources of a magnetic field in addition to the two known models of uniformly magnetized permanent magnets (current and charge models). Each point source is characterized by a vector magnetic moment. The features of the model for permanent magnets of various shapes are considered. The advantage of the new model is to reduce the computation time of the magnetic field parameters by reducing the dimensionality of the modeling problem.
Climate change induced socio-economic tipping points: review and stakeholder consultation for policy relevant research
Authors: van Ginkel Kees C H , Botzen W J Wouter , Haasnoot Marjolijn , Bachner Gabriel , Steininger Karl W , Hinkel Jochen , Watkiss Paul , Boere Esther , Jeuken Ad , de Murieta Elisa Sainz , Bosello Francesco
Published: December 2019

Tipping points have become a key concept in research on climate change, indicating points of abrupt transition in biophysical systems as well as transformative changes in adaptation and mitigation strategies. However, the potential existence of tipping points in socio-economic systems has remained underexplored, whereas they might be highly policy relevant. This paper describes characteristics of climate change induced socio-economic tipping points (SETPs) to guide future research on SETPS to inform climate policy. We review existing literature to create a tipping point typology and to derive the following SETP definition: a climate change induced, abrupt change of a socio-economic system, into a new, fundamentally different state. Through stakeholder consultation, we identify 22 candidate SETP examples with policy relevance for Europe. Three of these are described in higher detail to identify their tipping point characteristics (stable states, mechanisms and abrupt change): the collapse of winter sports tourism, farmland abandonment and sea-level rise-induced migration. We find that stakeholder perceptions play an important role in describing SETPs. The role of climate drivers is difficult to isolate from other drivers because of complex interplays with socio-economic factors. In some cases, the rate of change rather than the magnitude of change causes a tipping point. The clearest SETPs are found on small system scales. On a national to continental scale, SETPs are less obvious because they are difficult to separate from their associated economic substitution effects and policy response. Some proposed adaptation measures are so transformative that their implementations can be considered an SETP in terms of ‘response to climate change’. Future research can focus on identification and impact analysis of tipping points using stylized models, on the exceedance of stakeholder-defined critical thresholds in the RCP/SSP space and on the macro-economic impacts of new system states.
Chicken nugget nutrition composition with an additional variation of breadfruit flour
Authors: Hafid H , Nuraini  , Agustina D , Fitrianingsih  , Inderawati  , Ananda S H , Anggraini D. U. , Nurhidayati F
Published: December 2019

The study aims to evaluate nuggets substituted with chicken intestine and breadfruit flour. The treatment consisted of 100% topica flour (P1), and substitution with breadfruit flour each of 15% (P2), 25% (P3), 35% (P4), 50% (P5), 65% (P6), 75% (P7), 85% (P8), 100% (P9). The study showed that the water content of P4 nugget to 100% (P9) was significantly lower than the control (P1). 100% ash content substitution nugget (P9) breadfruit flour was significantly higher than the control. The substitution of breadfruit flour does not affect protein and fat. It was concluded that the substitution of breadfruit flour with tapioca in the manufacture of the nugget was significantly different in water content and ash, but protein and fat content of the resulting nugget were relatively the same. The composition of 50% substitution nugget tapioca flour and breadfruit 50% (P5) contains 61.5% water, 1.65% ash, 17.55% protein, and 17.72% fat.
Some glycemic carbohydrate indices as alternative foods for people with diabetes mellitus (dm)
Authors: Harleli  , Ruwiah  , Naro Elyas Sueratman AR
Published: December 2019

Diabetes mellitus (DM) is a metabolic disease that increases blood glucose levels above normal due to abnormal insulin secretion, insulin action, or both. The purpose of this study is to determine the glycemic index (IG) of several types of food. The method of this study was observational with cross-sectional study design. The results showed that the lowest GI was young corn (IG 34), kepok banana (IG 46), cassava (IG 46), Havermuth (IG 48), sweet potato (IG 51), and taro (IG 54). Head rice has a high GI, which is 78. This study concludes that the lowest GI is young IG 34 and the highest is rice, having IG 78. This study is expected as a strategy in the selection of low-GI food ingredients as a preventive measure dm.
Analysis of the competitiveness of cocoa commodity (Theobroma cacao L.) in Kolaka Regency
Authors: Kasmin M O , Nursalam
Published: December 2019

This study aimed to analyze the level of comparative and competitive advantage of cocoa commodities at the farm level in Kolaka regency, and to analyze the impact of government's policy on the comparative and competitive advantage of cocoa commodities in Kolaka regency. The study used the Policy Analysis Matrix (PAM) to analyze data. The results of the study showed that the private benefit of cocoa farm level in Kolaka regency was IDR 8.579.759-, whereas the social benefit was IDR 10.169.805. Cocoa commodity in Kolaka regency has a high level of competitiveness as shown by the DRCR value of 0,69 and PCR value of 0,67. Regarding the government's policy on output, it was revealed that farmers do not gain benefits from the government's policy on the output as shown by the NPCO value of 0,9597. The government's on input (tradable input) has created an efficiency cocoa farming in Kolaka regency as indicated by the NPCI value of 0,4434. The government's policy of input-output showed that there is a government policy which reduces the benefits of the cocoa producer in Kolaka regency as indicated by the PC value of 0,8436.
Daylight intensity analysis of secondary school buildings for environmental development
Authors: Irnawaty I , Ramli Rahim M. , Hamzah Baharuddin , Jamala Nurul
Published: December 2019

Environmental development can be achieved by implementing energy efficiency in buildings. According to International Energy Agency (IEA) data, the lighting sector consumes 20% of world electricity production, contributes 6% of global CO2 emissions and as much as 3% of world oil demand for the same purpose. Natural lighting is the best lighting source for buildings, including school buildings. By optimizing the lighting in the building, it will save energy use in the building. This study discusses the compatibility of natural lighting in junior high school classrooms and meets SNI 03-6197-2000 standards for building lighting. The method of this research is quantitative, data obtained through survey measurements directly at the study site. There are four junior high schools in the city of Makassar that were used as research samples. The sample was chosen by purposive sampling. In each school, morning measurements are carried out until noon. The results showed that most of the natural light in junior high school classrooms in Makassar City was below the average lighting standards of SNI classrooms. A total of 75.00% of the SNI standard is average for classrooms and only 25.00% exceeds the SNI standard value.
Analysis of the water availability in Dante Spring to supply the water needs of the people of Bontongan Village, Enrekang District
Authors: Djunur L H
Published: December 2019

Water absorption on the land surface is influenced by several factors, including coverage or area, soil conditions, and vegetation. Drinking water Supply System has not a national policy that aims to increase public access to water with quality ready to drink. By respect to the necessary to supervise the quality of water distribution to the public by the provider of drinking water service. The tightly of surface conditions, the infiltration rate will be smaller and the greater the runoff this happens because the solid soil is difficult to penetrate by water. The soil surface nature determines it is factors; density and the presence of plants. To increase the power of capacity or soil absorption, carried out using tree roots as an alternative to minimize the occur of inundation, so that research was conducted on samples of inundation land grass and tree roots vegetation in the laboratory. The results land natural was runoff obtained 25456.79 ml/minute and while the land with tree cover runoff was 19665.10 ml/minute. Through testing the Rainfall Simulator, tree root material in soil samples can reduce 22.75% of the inundation and while samples with grass cover can reduce as much as 19.35%. From this research, it was concluded that the roots of pucuk merah plant used in testing could be an alternative to the vegetation of land cover to minimize surface runoff.
Synchronization of local knowledge with formal regulations supporting natural resource conservation in Bajo communities in West Muna District
Authors: Sifatu Wa Ode , Bahtiar  , Naro Elyas Sueratman AR
Published: December 2019

The purpose of the article is to inform the reader about local knowledge supporting the conservation of marine natural resources from the Bajo Community in West Muna District. The theory for reading data is Geertz's thought of from the native point of view, with ethnographic methods. Data collection was done by in-depth interviewing techniques and participant observation. Data were analyzed descriptively qualitatively. The results of the research, Pamali, Karanu, and MboJanggo are the local knowledge of the Bajo Community towards the conservation of marine natural resources, relatively actualized by the elderly, except for the younger generation because of the exposure to globalization and the absence of local government appeals to it. Two ways to maintain local knowledge: (a) through education; (b) through the Bajo Community social network; and (c) local knowledge is synchronized with formal rules. In conclusion, the novelty of this study was that local knowledge was interrupted because the culture disappeared. The impact: the local wisdom of the Bajo Community is threatened to disappear. The presence of the Regional Autonomy system should be the local government as the driving force for the survival of local wisdom from the community from exposure to globalization.
Assessment load capacity in floor constructions
Authors: Serykh I R , Chernysheva E V , Degtyar A N
Published: December 2019

The desire to use warehouse space with maximum efficiency has led to the development of the warehouse technology. The emergence of the new types of material handling equipment, an increase in their movement speed, the emergence of new multi-tiered storage systems inevitably affects the carrying capacity of the floor structure. It should also be borne in mind that in the course of operation, the ability of the floor construction to absorb external load decreases. That is why before the start of the operation at the old storage facilities it is advisable to assess their carrying capacity. One of the main types of inspections of building structures is the examination of the concrete floor, which is carried out in order to assess its strength, detect various types of defects, as well as check the operating conditions for compliance with building codes. The most frequent reason for technical inspection of the floor is the reconstruction or overhaul of a construction site. Therefore, the examination of the floor becomes a prerequisite for the object launch in operation. In addition, the reason for the survey may be doubts about the quality of the floors after putting them into operation; increased floor load; detection of cracks or the development of old cracks on the floor covering. In the article the authors consider the examination of the floor construction of warehouse premises belonging to the enterprise of Belgorod.
Technical- and- economic efficiency of reinforced wooden structures
Authors: Roschina S I , Lisyatnikov M S , Koshcheev A A
Published: December 2019

The article is devoted to the investigation of the technical and economic efficiency of the reinforced wooden structures by the example of the load beams with a span of 18 m. The efficiency has been estimated by the constructional, technical and economic indexes such as the relative height, relative installation weight and relative unit cost. All indexes have been considered in comparison to the equally efficient and equally rigid reinforced and unreinforced wooden structures. Technical and economic indexes of the beams have been given: the bulk, consumption of basic materials, labor intensity, factory price, total value, capital investments and reduced costs. The efficiency of using group reinforcement over a part of the beam length compression area has been substantiated.
The operation analysis of the stanchion as an open column element
Authors: Solodov N V
Published: December 2019

One-story buildings with steel frames are used in many cases for the output production for various purposes. The main vertical bearing element of such frames are the steel columns. With the presence of the technological lifting mechanisms in the building in the form of bridge supporting cranes in such columns, the crane part is designed lattice, and a special step (ledge, beam) is provided in the column design for supporting the crane girders. The columns are determined for a significant proportion of the metal consumed on the steel frame. Reducing the metal columns is an urgent task. Improving the efficiency of the design solutions is possible based on the study of the structures’ actual operation factors, in particular – the columns stability, and the accumulation of data to clarify the standard design methods for sustainability.
The calculating the progressive collapse problem in the light of the existing regulatory framework of the Russian Federation
Authors: Kolesnik O , Kolesnik D
Published: December 2019

It has become increasingly important to consider emergency situations having a low occurrence probability and short duration and being important from the point of view of the reaching the limiting conditions consequences that may arise in such situations, in recent time, when designing industrial and civil engineering facilities. An example of such emergency is one of the supporting building structures failure, which can lead to its progressive (avalanche-like) collapse. At the same time, one of the main problems in this situation until recently was that until 2018-2019 there was no single regulatory document in the Russian Federation regulating both the actual calculation for progressive collapse and the criteria according to which the structures can be considered stable or unstable to progressive collapse.
Seismic resistance increase of operated buildings using special seismic protection devices
Authors: Belash T A , Bogdanova G A
Published: December 2019

In recent years, seismicity has been increased several times in the Russian Federation. The situation exerts a significant effect on the seismic resistance of existing facilities. It is known that buildings can be reinforced by using various methods among which unconventional seismic protection devices that include seismic isolation and seismic damping hold a special place, being efficiently used not only in newly built buildings, but also in operated ones. Unconventional methods implementation of the seismic resistance increase in operated buildings is shown using specific examples. Rubber-metal supports, dynamic absorber and rubbing friction dampers are used. Recommendations on their specific use to improve buildings seismic resistance are offered.
The simplex piles bearing capacity
Authors: Borozenets L M , Ushakova E A
Published: December 2019

The results of innovative achievements in the pre-stressed tubular-filled single-drilled piles-foundations construction field are presented. The integrated solution relevance of the scientific and technical problem of developing geotechnical engineering for the considered piles designing efficient structures is shown. For the first time, the physically maximum possible resource carrying capacity of the piles bases under investigation is realized. Geotechnical design of single-hole Simplex piles effective structures allows determining their design dimensions from the bases bearing capacity values equal to the values of critical loads on the pile.
The study of materials for soil stabilization and their practical application
Authors: Kuznetsov M V , Marinchenko E V , Chmshkyan A V
Published: December 2019

The article describes the buildings bases consolidation on the example of a 12-storey residential building with two levels of underground parking adjacent to the existing buildings. The cement with different additives mechanical properties laboratory studies results and the components consumption per unit of working solution are given. The foamed soil cementcompositions preparation technology is described.
Technical condition diagnostics of the water supply facilities in the irrigation systems
Authors: Olgarenko V I , Olgarenko I V , Olgarenko V I
Published: December 2019

When diagnosing the technical condition of water supply facilities in the irrigation systems, non-destructive testing methods are used, such as: an anchor tearing out, ultrasonic, magnetic and shock impulse. However, these methods have drawbacks, and therefore is a need to improve the diagnosing method for the technical condition of the irrigation systems.
Evaluation of the use of Egyptian black sand for water reuse
Authors: Smolyanichenko A S , Khalil A S
Published: December 2019

The presented article refers to studies that examined the catalytic properties of black sand (AR Egypt) for its further use in water purification in fishery complexes. Also, black sand was used as a filter material in a radial filter model. According to experimental data, the stated hypotheses were confirmed.
The basic properties study of the dust particles entering the localization system and emissions cleaning in the aerated concrete production and building gas concrete blocks
Authors: Kondratenko T O , Danilova-Volkovskaya G M , Fursov V A , Kobalia T L
Published: December 2019

At most of the construction industry large enterprises, focused on the building materials and products production, where bulk materials are used as charge stock and there are crushing, grinding operations, etc. as a part of the technological chick, atmospheric dust emissions are not reduced in air to normalized values. Especially it concerns fine particles PM10 and PM2.5. The basis for solving the problem of ensuring environmental safety in the aerated concrete production is the efficient dust removal systems development. To solve this problem, it is necessary to study the released dust properties.
Diversive particles filler forms influence on mechanical properties foam concrete mixutes
Authors: Morgun V N , Morgun L V , Nagorskiy V V
Published: December 2019

Problems of energy saving in the building complex require the development of gas-filled concrete technologies. The existing level of knowledge about the regularities of the formation of high-strength structures is insufficient for the qualitative management of technological processes in production. Therefore, an attempt to analyze the effect of the recipe and the surface properties of raw materials on the rate of phase transitions in foam concrete mixes and their strength has been made. The positive qualitative and quantitative influence of the aggregate fibrous form on the properties of the foam concrete mixes has been established.
Causes and mechanism of destruction of heat-resistant concrete in an aggressive reducing gas environment of carbon monoxide at high temperatures
Authors: Arzumanyan Artavazd
Published: December 2019

Scientific and technological progress in a number of industries has led to the need to create new types of thermal aggregates in which high-temperature production processes occur in the presence of highly aggressive media towards lining materials. The medium with a high concentration of carbon monoxide (CO) reducing gas can be considered as an example.

For the lining of such thermal aggregates in practice, special piece refractory were used, therefore, the available literature data on the resistance of materials under these conditions are mainly related to them, and for fundamentally different heat-resistant concretes this question is not well studied.

It should be noted that heat-resistant concrete is a relatively new type of lining material, which has proven high technical and economic efficiency of use. They are non fired materials, the stabilization of the structure and properties of which occurs during drying and first heating of the structures, which are made from the latter - directly in the constructed thermal aggregate.

In view of the circumstances, in comparison with pre-fired refractory items, have a number of features, and question arose on the way to creating similar heat-resistant concrete, which require thorough studies. A variety of heat-resistant aggregates, binders and concrete on their base with different chemical and mineralogical compositions, structures and physical and mechanical properties were studied through various laboratory tests.

As a result of physical and mechanical, physical and chemical and electron-microscopic complex studies, the causes and the mechanism of their destruction in these conditions are identified and all the initial requirements for the components and technologies for preparing and using such concretes are established.

The correctness of the established criteria is proved by the long-term reliable operation of lightweight heat-corrosion-resistant perlite concrete, developed on high-alumina cements in monolithic linings of a number of thermal aggregates of Oskol Electrometallurgical Plant of the Russian Federation. In the presented article, only part of the results is presented, which relates to the causes and mechanisms of destruction of heat-resistant concrete in afore-mentioned conditions.
The residential buildings of the 1960s architectural renovation
Authors: Astakhova E
Published: December 2019

This article examines the relevance of architectural renovation, in particular the renovation of the industrial house-building first generation old residential buildings. The typical apartment projects with economical apartments developed in 1957-58 were very timely in solving the social problem of settlement, and were designed in two categories - the long and short lifetime. Existing physical deterioration makes it possible to consider their renovation question, since such a type of dwelling is in demand as affordable and cheap housing. This article deals with the features of planning decisions of the 1960s housing stock, emphasizing the elements that do not meet modern functional requirements. A program for renovation of residential buildings of the 60s is proposed. It allows to approach the modern standards of housing. Attention is paid to the algorithms of the apartment redevelopment: with the preservation of the number of apartments on the floor, or with the apartments consolidation. Possible constructive variants of superstructures from the mansards to several floors are considered. The renovation program was experimentally tested on the example of the Rostov-on-Don city, as a part of an academic design. Residential buildings of the 60s were chosen as objects. They are located in the urban areas that have lost their compositional structure due to new construction in order to simulate various options for superstructures.
The collapsible type “terme” traditional Togai Hurt art reconstruction
Authors: Kanokova F Yu
Published: December 2019

The artistic design features and a compositional system for the design of the external and internal decoration of the Nogai people traditional dwelling - the yurt of the collapsible type “terme” have been investigated. The artistic-figurative object’s and its components reconstruction was carried out on the basis of graphic, written and material sources has been performed, the subject-spatial environment organization basic principles have been determined, sign functions, color and ornamental formulas have been revealed.
Domestic experience in the reorganization of degrading industrial areas in landscape and recreational areas
Authors: Yarmosh T S , Buyankina V A
Published: December 2019

In recent decades, a trend towards the reorganization of industrial areas around the world, the goal of which is the sustainable development of the urban environment has been of great interest. Obsolete technologies in various areas of production are being replaced by the innovative ones. In this regard, industrial enterprises occupying the significant spaces for the city, which are not only the reserve of the land fund, but also its urban planning potential, are closed and empty. The article discusses one of the methods of the degrading industrial territories reorganization - their transformation into landscape - recreational zones, as well as domestic experience of the work carried out in this area.
Interior design of habilitation centers for young children
Authors: Kasper N V , Ilvitskaya S V , Petrova L V , Shulginova O A
Published: December 2019

The development of young children’s habilitation system in Russia and habilitation centers and departments emergence requires architects to develop optimal interior solutions to ensure that the architectural environment meets the habilitation process requirements. The article discusses the principles of the architectural habilitation environment formation and the techniques for their implementation in the interior design of the habilitation centers. Formation recommendations on the interior design concepts, functional spaces zoning, color solutions, the choice of finishing materials, furniture, equipment and lighting are given.
The problems of autochthonity of church construction in the Don region
Authors: Evenko M G , Doroginin Yu V , Shinkarenko Yu V
Published: December 2019

The architectural features of the Orthodox church of Don region being the main subject of the article are considered in the historical, cultural and comparative perspective. The Resurrection Military Council and the tent belfry of Starocherkassk are presented as the examples of the original forms and solutions that are typical for the temples of this region. The problem of influence of other architectural and artistic styles is touched upon, the creative assimilation of which did not lead to the loss of the traditional forms and autochthonity of the Orthodox churches in the Don region.
City brands: identity in the urban environment
Authors: Gorgorova Yu. V.
Published: December 2019

Global experience of designing the urban environment based on the city brand concept is analyzed in the article. Examples of the city brand visual representation are considered. Examples when the color is the main city brand concept. Experimental design results of the urban environment, made on the basis of the city brand are shown.
The spatial byzantium culture in the North-East Black Sea coastal area fortification architecture
Authors: Pishchulina V , Argun A
Published: December 2019

The article is dedicated to the early medieval North-East Black Sea coastal area fortification objects systematization. As a result of the research we have revealed three types of fortress according to their spatial culture and the belonging of its components to the Byzantium culture: the classical type of fortress, the contaminated type of fortress, the guarded fortress. We have also marked architectural and compositional peculiarities of each type taking into consideration their territorial and spatial location, extensional and planning solutions, decorations and building technique. We have assumed that all the examined early medieval fortification objects belonged to the Byzantine culture.
Gothic and neo-gothic in the architecture of modern European cities
Authors: Basina N I , Rybalka A Yu , Popova S L
Published: December 2019

This article analyzes the value social dynamics of European culture based on the analysis of the semantics of Gothic and Neo-Gothic styles in the architecture of European cities. The semantic and social status levels of these phenomena are investigated. It is revealed that the Gothic style, having appeared at a symbolic level as a mature expression of the spirit and dogma of Catholicism, in the urban space appeared to be a marker of the social, property and political superiority of status groups (clergy, monarch, burghers, feudal nobility; status cities).