scholarly journals Quality evaluation and loss estimation at gravel quarries around the Qena Governorate, Egypt: A case study

2021 ◽  
Vol 15 (2) ◽  
pp. 89-94
Author(s):  
Mahrous A.M Ali ◽  
Mohamed M.A Hassan ◽  
Jung-Gyu Kim ◽  
Jong-Gwan Kim
Keyword(s):  
Building Materials ◽  
Quality Evaluation ◽  
Road Construction ◽  
Base Layer ◽  
Physical Chemical ◽  
Application Methods ◽  
Practical Implications ◽  
Representative Samples

Purpose. In recent years in Egypt there has been a significant increase in the demand for building materials, particularly gravel which is employed in buildings, the base layer for road construction, and other industries. The quality of gravel that is deemed suitable for different purposes depends on the physical, chemical, and mechanical properties of the gravel; these aspects are determined according to the Egyptian Code, depending on the required application. Methods. Representative samples were collected from two working sides of the quarries, then they were processed in a laboratory to characterize the samples depending on the location and evaluate their properties with respect to the corresponding concrete and road codes. Findings. The findings indicate that the gravel tests were simple to conduct and that the gravel from these locations were suitable for constructed roads and to be used in mixture of asphalt and cement. Originality. The samples were collected from five quarries around the Qena Governorate, Egypt; each of these locations occupied areas ranging from approximately 100×100 or 200×100 m2. Practical implications. The loss of gravel at the studied quarries was found to be 32.88-44.06%. Abo-Teshet 1 exhibited the highest loss of gravel deposits with thicknesses ranging from 0.5 to 1.50 m, which was attributed to the fill layers.

scholarly journals Staffing System Management: Evidences from Singapore

2017 ◽  
Vol 7 (2) ◽  
pp. 136
Author(s):  
Mussie T. Tessema ◽  
Kubilay Gok ◽  
Alex Ngoma ◽  
Mengsteab Tesfayohannes ◽  
Gerry V. Fernando
Keyword(s):  
Public Service ◽  
Research Direction ◽  
Future Research ◽  
System Management ◽  
Critical Factors ◽  
Organization Level ◽  
The World ◽  
Practical Implications

This paper uses Singapore as a case study to illustrate how staffing policies and practices affect the quality of the workforce which ultimately influence performance at employee and organization level. It reveals that Singapore public service has been able to put in place most of the ‘critical factors’ for an effective staffing system management. The presence of those critical factors have played an important role in making Singapore to be one of the most effective public services in the world. Finally, it forwards theoretical and practical implications of the study and future research direction.

scholarly journals The Meaning of Water Environment for Stilt Houses on the Musi Riverbanks, Palembang

2021 ◽  
Vol 6 (2) ◽  
pp. 70-77
Author(s):  
Ari Siswanto ◽  
◽  
Ira Kusumawaty ◽  
Keyword(s):  
Water Environment ◽  
Road Construction ◽  
The Road ◽  
Lowland Area ◽  
Tidal Swamps ◽  
Agriculture Development ◽  
Musi River

Water functions are very diverse for humans for daily needs such as drinking water, bathing, agriculture, development, aesthetics, and lower temperatures. Palembang is a lowland area dominated by wetlands, tidal swamps, and rivers. The types of houses on stilts on the banks of the Musi river are limas, Gudang, and Chinese stilt houses which are always associated with the water environment. The construction of roads replacing the role of rivers has realized people that the water environment has an important meaning for the house on stilts. The research objective was to explore the meaning of the water environment from various aspects for residents, stilt houses, and their environment. This research method is a case study with data collection through interviews, observation, measurements, and taking photos. Data and findings were analyzed and juxtaposed with images in the field. The road construction has eliminated part of the function of the river and influenced the change in orientation of the house on stilts. In conclusion, respect for the water environment including rivers has decreased, causing the quality of the river to decline, and the house on stilts cannot take advantage of the existence of the water environment optimally

scholarly journals The impact of coal ash and slag dump on the quality of surface and ground waters - a case study

2019 ◽  
Vol 84 (5) ◽  
pp. 527-530
Author(s):  
Ivana Cipranic ◽  
Radmila Markovic ◽  
Stefan Djordjievski ◽  
Zoran Stevanovic ◽  
Marija Stevanovic
Keyword(s):  
Water Samples ◽  
Coal Ash ◽  
Negative Influence ◽  
Physical Treatment ◽  
Physical Chemical ◽  
Quality Of Water ◽  
Slag Dump ◽  
The Impact

This paper presents the assessment of the impact of coal ash and slag from the ?Maljevac? dump on the quality of water of Paleski Creek, Montenegro. The obtained results confirm the negative influence of surface and groundwater from the dump on the water from the Paleski Creek. The results obtained by testing of the water samples, collected from Paleski Creek upstream of the dump, indicate that the water is qualified to be used for drinking, after simple physical treatment and disinfection. The results obtained for the water samples collected from the Paleski creek downstream from the dump indicate that the water could be safe for drinking only after the treatment that requires an intensive physical, chemical and biological processing, including some extended treatment.

scholarly journals QUALITY EVALUATION OF SOME BOTTLED WATERS AVAILABLE IN IRAQI MARKET

2021 ◽  
Vol 25 (4) ◽  
pp. 13-22
Author(s):  
Mohammed A. Rashid ◽  
◽  
Nagam O. Kariem ◽  
Keyword(s):  
Quality Evaluation ◽  
Trade Mark ◽  
International Standards ◽  
The Other ◽  
Fecal Coliforms ◽  
Physical Chemical ◽  
Trade Names ◽  
Ph Range ◽  
Physical And Chemical

This study was intended to evaluate the quality of some bottled waters available in Iraqi market, by testing their physical, chemical and biological characteristics. These samples produced by four companies during the period of December- 2016 to April-2017. The selected companies had the biggest sells and were under the trade names of AlluLua, Ala, Alwafi, and Venesia. The results showed that most bottled waters samples characteristics were in compliance with Iraqi and international standards, with some superiority in water quality for the trade mark Allulua upon the other companies, but the trade mark Ala was at the end of the list of quality rank. All the tested samples showed clean bacteriological results for coliforms as pollution indicators and fecal coliforms (all tests MPN was less than 1.1). The other physical and chemical characteristics showed pH range of 6.21 ~ 7.7, TDS of 12.81 ~ 126.88 mg/L, Ca of 0.24 ~ 25.5 mg/L, Mg of 3.2 ~ 13.1 mg/L, Na of 0.92 ~ 23 mg/L, K of 0 ~ 0.39 mg/L, Hardness of 3.8 ~ 38.2 mg/L, and chloride of 3.55 ~ 35.5 mg/L.

scholarly journals Structurization of poly mineral is highly concentrated poly disperse systems based on organic binders

2018 ◽  
Vol 251 ◽  
pp. 01038
Author(s):  
Eduard Kotlyarsky ◽  
Naum Uriev ◽  
Yury Vasilev ◽  
Vladimir Kochnev ◽  
Igor Sarichev
Keyword(s):  
Chemical Nature ◽  
Road Construction ◽  
Material Behavior ◽  
Contact Interactions ◽  
Disperse Systems ◽  
Physical Chemical ◽  
The Russian Federation ◽  
Technical Properties ◽  
Mineral Mixtures

At present, the quality of bitumen-mineral mixtures both on the territory of the Russian Federation and abroad is estimated by a set of em-pirical methods based on many years of experience in the use of asphalt in road construction. In different years, numerous attempts were made to theoretically substantiate the basic patterns of material behavior under the influence of various factors. The article describes the solution of this problem using the basic provisions of phys-chemical mechanics of highly concentrated disperse systems taking into account the specifics of contact interactions. As a result of researches the quantitative correlations of indicators of physical-mechanical and structural-rheological properties forming at compaction of mixtures mixes, quantitative interconnections between formative and Destructive factors with structural-mechanical and construction-technical properties of asphalt in road coverings. It has been established that the changes in the structure of asphalt have physical-chemical nature and are reliably described taking into account the basic provisions of phys-chemical mechanics and theories of contact interactions.

scholarly journals Business networking in organisationally thin regions: a case study on network brokers, SMEs and knowledge-sharing

2020 ◽  
Vol 27 (5) ◽  
pp. 839-861 ◽  
Author(s):  
Birgit Leick ◽  
Susanne Gretzinger
Keyword(s):  
Public Policy ◽  
Knowledge Sharing ◽  
Knowledge Exchange ◽  
Business Networks ◽  
Content Type ◽  
Different Types ◽  
Business Networking ◽  
Practical Implications

PurposeResearch on business networks in organisationally thin regions, which are characterised by a low density and quality of business networks, is still in its infancy, while the facilitation of business networks receives increasing interest. The present paper combines both perspectives by investigating how different types of network brokers facilitate business networking and knowledge-sharing in organisationally thin regions.Design/methodology/approachBurt's theory on brokers in social networks is applied to knowledge-sharing in business networks for organisational thinness as context. A qualitative case study represents the empirical basis that describes network brokers from various domains in three different German case regions, which are characterised by organisational thinness.FindingsThe network brokers studied facilitate different types of business networks, and they use various levers to increase knowledge-sharing among companies in business networks. Two broker types emerge, private business-driven versus public policy-driven network brokers with distinct approaches to the facilitation of business networking and knowledge-sharing and different limitations due to organisational thinness.Practical implicationsCompanies, notably SMEs, in contexts characterised by low networking density and quality may benefit from various types of network brokers that foster business networking and instigate knowledge exchange. Public policy should embed activities of private brokers in existing SME assistance programmes to increase the quantity and quality of business networks.Originality/valueNetwork facilitation in regions with weaknesses in their endowment with industry clusters, business networks and innovative knowledge exchange is under-explored, and this paper contributes to shedding light on this topic with a case study.

scholarly journals Low Polluting Building Materials and Ventilation for Good Air Quality in Residential Buildings: A Cost–Benefit Study

Atmosphere ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 102 ◽  
Author(s):  
Francesco Babich ◽  
Ingrid Demanega ◽  
Francesca Avella ◽  
Annamaria Belleri
Keyword(s):  
Air Quality ◽  
Indoor Air ◽  
Building Materials ◽  
Cost Benefit Analysis ◽  
Residential Buildings ◽  
Cost Benefit ◽  
Capital Cost ◽  
Ventilation Rates

Nowadays, people spend an average of 87% of their time inside buildings, and about 69% at home. Hence, it is essential to ensure the highest possible level of indoor air quality (IAQ). Providing that the quality of the outdoor air is acceptable, the IAQ level is improved by increasing the ventilation rates. However, this means that a larger volume of air must be cooled down or warmed up to ensure the same level of thermal comfort. The aim of this study was to conduct a cost–benefit analysis of the IAQ in residential buildings. A case-study building was defined, and three sets of materials with different pollution emission levels were chosen: High, low, and very low. For each option, the ventilation rates required to have the same IAQ level were calculated, and the consequent energy consumption and costs were estimated by means of dynamic thermal simulation. The results show the range of the initial capital cost that could be compensated for by lower running costs, and the effect of each energy and economic input assumption on the appraisal of the affordable capital cost. In the discussion, insights into the IAQ co-benefits are also given.

Public Satisfaction of Highway Landscape Quality: A Case Study from China

2011 ◽  
Vol 460-461 ◽  
pp. 611-616
Author(s):  
Hong Jie Li ◽  
Xiao Ning Zhang
Keyword(s):  
Statistical Methods ◽  
Quality Evaluation ◽  
Validity And Reliability ◽  
Evaluation Indexes ◽  
The Public ◽  
Model Based ◽  
Landscape Quality

The research presented here constructed highway landscape quality evaluation indexes and a model based on public satisfaction. The goal was to determine if public satisfaction of highway landscape quality can be statistically measured. Several methods of highway landscape quality evaluation were first reviewed to determine what limitations were existed. From that review, a highway landscape quality evaluation indexes were selected and a model based on the selected indexes were constructed according to theory of public satisfaction. An on-site study was conducted to obtain public satisfaction of a scenic road using the selected indexes and model, statistical methods were employed to test the validity and reliability. Results indicate that the public satisfaction can reflect the quality of highway landscape, and the selected indexes can fully represent highway landscape quality.

scholarly journals The use of stabilizers to improve the strength of the soil foundation of roads

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Rashidbek Hudaykulov ◽  
Tokhirjan Mirzayev
Keyword(s):  
Building Materials ◽  
Harmful Effect ◽  
Road Construction ◽  
Maintenance And Repair ◽  
Loess Soils ◽  
Strength And Deformation ◽  
Time Savings ◽  
Soil Foundation ◽  
Stability Of Water

This article describes the improvements, strength and deformation characteristics of loess soils used in the construction of road pavements with a stabilizer T-RRP. With the help of laboratory analyzes, a recommendation was developed on the use of stabilizers to improve the properties of loess soils used in the calculation of the pavement design. The use of stabilizers in road construction, in particular T-RRP, gives the following advantages: 1. Time savings during construction; 2. Saving ordinary building materials; 3. Shipping costs are eliminated; 4. Saving financial work afterwards; 5. Lack of repair later; 6. Minimal use of machines. 7. Minimal use of working force. The degree of adequacy of the project. Interested enterprises in the project are: LLC «FAYANTRANS», PEC «Avtomagistral», SRRCO «Uzavtoyul». The significance of the final results: the proposed methods of road construction, compared with traditional methods, gives the following advantages: the permissible load on roads constructed with the use of stabilizers in more than doubled compared to roads built in the usual way; reducing the thickness of the pavement by more than 25 % on the soil treated with stabilizers; built with the use of stabilizers roads increase their strength year after year; strength and stability of water-physical properties of clay soils used in the construction of roads, airfields, hydraulic structures; building with the use of stabilizers meets the requirements of ecology since it doesn’t produce harmful effect on groundwater. In addition to the advantages noted above, the use of stabilizers allows: increase the service life of coatings; get savings on maintenance and repair; increase the pace of construction; improve the quality of structures being built.

scholarly journals A note on auditing fair value of investment properties

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Bo Nordlund ◽  
Johan Lorentzon ◽  
Hans Lind
Keyword(s):  
Fair Value ◽  
Financial Reports ◽  
Content Type ◽  
Market Values ◽  
Substantial Risk ◽  
Fair Market ◽  
Depth Interviews ◽  
Practical Implications

PurposeThe purpose of this article is to study how fair values in financial reports are audited.Design/methodology/approachThe study is a qualitative case study based on in-depth interviews.FindingsOne important finding is that auditors anchor in the figure presented by the company, and despite the auditing efforts, there is a substantial risk of management bias in the fair values reported. There is a risk for confirmation bias.Research limitations/implicationsRelatively, few respondents were employed in this study, but their background and competence lead to the assessment that the study provides a representative picture of what is being investigated.Practical implicationsAuditors may need to develop ways of performing auditing of fair values to reduce the risks identified in this study.Social implicationsThis study presents a perspective of the auditing process enabling an evaluation of the quality of fair value estimates regarding investment properties in the financial reports. This study also provides users of financial reports as investors, bankers and other institutions with an enhanced understanding of reported estimates of fair (market) values.Originality/valueVery few studies have investigated how auditors evaluate fair values of investment properties. This study contributes by giving users of financial reports an enhanced understanding of the quality of reported estimates of fair (market) values.

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