Browse

In this study, the relationship between ground vibration, particle size distribution and energy distribution caused by blasting were investigated. For this purpose, ground vibrations were measured by using ground vibration monitors, Seismic Energies were calculated according to ground vibrations and particle size distribution were analyzed by using Split Desktop software. After these measurements and simulation, The relationship between PPV and SD which is the most widely used relationship in literature to predict...

The aim of this work is the optimization of sinter-crystallization regime of a glassceramic from a municipal solid waste incineratior (MSWI) bottom ash. The parent waste was melted at 1400oC, milled below 75 $\mu$m and the obtained glass powders were pressed at 100 MPa. The optimal temperature for sinter-crystallization was estimated by DTA, dilatometry and XRD. Subsequently, the degrees of sintering, obtained at different heating rates (between 2 and 40oC/min) and 1 h step at 950oC were estimated by the linear sh...

For many years, natural disasters were perceived as unavoidable strokes of misfortune brought about by nature’s unpredictable forces. Taking into consideration the magnitude of the tsunami in Asia in 2004, the heavy floods in Mozambique in 2000, and Hurricane Mitch in Central America in 1998, we can see that developing countries are the most victims of such events, mostly due to their limited capacities and resources to mitigate disasters. On another hand is quite visible the efforts that are put on places both to...

Extremely fast and dynamic changes in space require efficient and appropriate recordkeeping of these. Records of spatial data without a time component give insight into data at a current moment and in their current condition in the field or records. By adding the time component (4th dimension) to spatial data, an additional function of spatial database is enabled. Spatial database becomes a spatio-temporal database and it is possible to send queries to the base which result in a set of data at a certain time momen...

In Turkey in the Tuncbilek coal basin, the subject area of this study, there are gray and brown colored marl formations. As known, the test specimens shall be conditioned in such a way as to be reached to the natural water content before the strength tests, and it is preferred to use the saturated specimen in order to be representative for levels below the groundwater. It is noticed that the gray marl core samples taken from Tuncbilek were broken into parallel slices by the influence of water in less than half an ...

Bond-Order Conservation-Morse Potential (BOC-MP) method is used in order to carry out the calculation. One of the best catalysts for methanol synthesis in catalytic reduction of CO2 with H2O is Cu/ZnO/Al2O3 whose surface is supported by with some amount of Pd or Ga. Reduction of CO2 with H2O on Cu will result in methanol formation; while on Ni will lead to methane formation. In the mechanism of methanol synthesis from CO2+ H2O on Cu, the formate (HCOO) hydrogenation step is ratedetermining step and in the mechanis...

Ecological awareness today is necessary in the last decade, the nature is degraded as a result of over-using resource for completely the fulfillment. Macedonia is aspiring to become an EU member state and in this aspect environment requirements have to fulfilled. The ratification of international environmental conventions and their incorporation in Macedonian legislation will help to have better place to live. In this pare work ecological awareness is analyze in the Environment Laws, an another point of view, how ...

The oil and gas platform is a both structures and equipment. The life of offshore platforms included different phases like: design, construction, commissioning, operation, maintenance, decommissioning and disposal. Each one of these actions may originate project and or specific activity. The jobs of platform for every activities, is in a different period ands and different operator. This paper, provide information by the life and operation of offshore platforms, based to the optimization of engineering and economi...

As it is well-known, deceptive advertising has effects on consumer behaviors. This deceptive advertising ads are misleading the consumer perceptions by using demographic characteristics of consumers. They show behavioral differences that have been revealed in various literature researches. The internet and other technological tools can be used to convince the consumers. Young consumers compares competing products or services, investigate them in detail, and then intend to buy them. This research is based on the wa...

The mineralogical analysis is a highly effective method of prospecting diamond-hosting rocks. The main goal of investigating kimberlites rocks, the primary source of diamonds, is to examine the mineral composition of kimberlites. The microprobe analysis is currently the principal method to define the compositions of megacryst minerals from kimberlite rocks. In addition, determination of the groundmass mineral composition is important for evaluating the diamond potential of kimberlites. This paper presents results ...

In this paper we report the experimental measurements of Vp-Vs on Triassic marble samples that are Mugla White and Aubergine from Mugla region. The measurements of P-S wave velocities were performed at room temperature and high confining pressure up to 300 MPa in a heard type pressure vessel at ETH Zurich using the pulse transmission technique on 26 mm diameter cores. The white Mugla marble was isotropic and displayed Vp of 6.86 km/s and Vs of 4.34 km/s at 300 MPa confining pressure. The Aubergine marble from Mugl...

The aim of the present research work is to investigate the possibility of adding a mixture of non-granulated blast furnace slag (NGBFS) and steel slag, two wastes resulting from metallurgical industry which underwent calcinations previously, in the raw meal for the production of Portland eco-cement clinker. For this purpose, the NGBFS and steel slag from ArcelorMitall Steel Galati were analyzed for chemical, mineralogical and heavy metals contents. Two samples of raw mixes were prepared, one with typically raw mat...

One of the oldest geographical regions in Romania, the subcarpathian zone situated between the Ialomita and Prahova rivers, having important natural resources, has generated a geodemographical evolution of the human settlements different from other areas in the country, especially with the help of economical development. Starting from the 18th century until the second half of the 20th century, accented economical initiatives are observed. These are related to the exploitation and processing of oil resources, the e...

The paper presents a hydraulic system used for the recovery kinetic energy from the road motor vehicle in the braking phases and using it, in the acceleration phases, in order to energy saving of the motor vehicles. All the system is conceived like a mechatronics system, for the medium and heavy motor vehicles. The hydraulic system allows the extrapolation to different sizes of vehicles and can be mounted on new motor vehicles, as well as old cars, in the framework of rehabilitation actions. The energy recovery hy...

There are presented results of periodic measurements of radioactive gas - radon content in sea, river and drinking water in resort zone Ureki-Shekvetili at the Black Sea coast of Georgia during the period from September, 2008 till October, 2009. It is shown, that the level of radon content ranges in interval 0.12 – 0.44 Bq/L in sea water, 0.15 - 0.58 Bq/L and 0.13 – 0.59 Bq/L in river water for river Natanebi and river Supsa, accordingly, 7.9 – 14.0 Bq/L and 1.19 – 4.35 Bq/L in drinking tap and artesian water, acc...

In this survey, analysis of statistical results of water resource has been conducted in "Bastam" study area in Semnan province. This water resource includes well, spring, kanat, divergence stream from river, dike, diversion dam and pumping station. This statistical result was conducted according to the standard forms of power ministry of Iran in the desert and the recorded information is prepared into a database, on basis of 1:50000 maps in GIS environment for spatial and descriptive analysis. In addition, by surv...

An ultrasonic sound wave has been used in rock mechanics to determine rock properties for many years. Because it is a relatively simple, low-cost and non-destructive testing method compared to others. Water content, porosity, and cracks in the rocks structure are some of the most important parameters for P and S-wave speed. In Rocks, under uniaxial compression stress, the account of space inside the compressed rock is reduced while an ultrasonic sound waves speed is increased. However, after a certain level of com...

The mineralogical and technological study of gold ores and dressing products demonstrate the persistence of both the ores and products of their dressing, especially Floatation concentrates. The gold loss in the tails of Floatation beneficiation are primarily associated with the smallest size fractions less than 20 microns, which make up to 70\% of the total lost gold in the Floatation tails. It is obvious that increasing the extraction of gold by Floatation is directly linked to the development of the technologica...

Heavy metals existing over a limit due to being used industrially or naturally found on rock, in underground water and soil effects ecological system and human life negatively. Researchers have developed different methods for the observation of these metals which influence ecological system and human life. The aim of this study is to explain the graded extraction method with an example which is one of the analysis methods used in the detection of ratio of heavy metals (sample: Al, Mn) that are found in Coastal San...

The paper presents the structure of an interactive web platform for water integrated management, accessible on Internet. The users of the web platform have unlimited access at a lot of interest information from water integrated management, like: legislation in domain, diverse types of management systems, links to the others speciality sites, a discussion forum, cases studies, presentation of technologies for solving of the management water problems, etc. Through the web technological platform, the visitors / users...

The Low Resource Consumption Buildings and Construction by Use of Life-Cycle Assessment in Design and Decision Making (LoRe-LCA) project aims to coordinate activities regarding the application of life-cycle assessment (LCA) in the European construction sector, focusing on comparing and improving the functional units used for LCA for whole buildings, improving the possibilities to compare results for different alternatives during design stage, and for comparison of results for different buildings. The project focus...

An important element in the process of construction and demolition waste (CDW) recovery is the costs, which is necessary to incur in the recycling. The transportation costs create a significant part in total costs of recycling company. This is the main reason, why is important to deal with the distribution system of waste recycling, as well. We are able to define the model of CDW recycling following the analysis of recycling systems, its elements, mutual interactions and the ways of its existing in the real condit...

In 2009 engineering geological zoning of the riparian area of the town of Ruse, including the Danubian bank, the low floodplain terrace, the loess slope and the terraces T3,4, was carried out by the Geotechnical Research Station. The ports, the park, the Sextaginta Prista Roman fortress, the central urban part with impressive architectural ensembles and part of the West Industrial Zone are found in this area. The investigations were conducted within the frame of a contract with the Ruse municipality. Since the ori...

Mineral water and drinking water are two vital and immediate needs for human beings. The origin of 80\% of human diseases are unavailability of healthy water.75 percent of people in developing countries are deprived of facilities for water. Actually , healthy water is scarce and expensive. Pollutions descend the quality of water by changing it physically, chemically and biologically. Some of the pollutions are decadence and can be degraded easily, like human, animal and agricultural drainages. Some of the pollutio...

Surface and core sediment samples from the Iranian continental shelf of the Gulf of Oman have been studied using standard sedimentological techniques. Based on the grain size analysis of surface and core sediments, the silt fraction is the common sediment type in the Makran shelf. It ranges from 40\% up to 76\%. The amount of clay fraction varies from 19\% to 54\%. Sandy sediments appear in some cores up to 20\%. Mean content of organic matter and calcium carbonate in the sediments is around 1.75\% and 15.4\%, res...

In this presentation you will get a brief overview about experiences about the development of National Environmental Information System in Hungary. Regular collection of environmental data in Hungary goes back to the early eighties, parallel with establishment of administrative structure for environment management. Different environmental media was managed by different administrative bodies resulting in a lot of confusions and delays both in administrative procedures and reporting the state of environment. After t...

Waste deposing is the most important problems for a sustainable development of our societies. In this paper is shown some models, for determinate the exploitation with optimum fees of the waste deposing on the landfill. The model take in account local condition of warehousing, the existing of sorting technology, technical and managerial abilities in waste management, the support for an efficient strategy in regard to tariffs, billing and bills collections. The overall objective is to develop the necessary infrastr...

In this study, the effect of roasting and alkaline sulphide leaching pre-treatments on gold and silver recoveries by cyanidation from an antimonial refractory ore was investigated. Alkaline sulphide leach test for decomposition of antimonial sulphides were performed using Na2S and NaOH solution as leachant. Up to 85\% of antimony was removed by suitably adjusting the molar concentration of the leachant solution over two hours of leach time. Gold recovery in cyanidation was low (≤50\%) without pretreatment, but it ...

The presentation work contains the analyse knowledge, which were obtained from analysis the results, which were attained on the laboratory sintering pan. On this laboratory sintering pan are sufficiently simulating conditions, which are present in the sinter band. On the basis of the theoretical analyse, analysis measuring data, computing of the balance, production, qualitative and quantitative parameters of the sintering process we can conclude, that in the case of changing underpressure sucking air are influence...

Deformation measurements and analysis are one of the most significant subjects in geodesy. Deformation monitoring and taking precautions on time is very important for safety of people and facilities. In this research, three period measurements were done in a trigonometric levelling network. S transformation and Kalman filtering techniques were performed for detection of vertical deformations. Results showed that both methods determined vertical displacements at the same points. Moreover, the values of velocity and...

Hydrogeological features of the quaternary sediments lies in different assumption for the emergence of freatic accumulations of groundwater and the ability to power or, conversely, to some extent seal underlying aquifers. Effect of the opencast mining on activities of quaternary sediments is significant and consists primarily in a drainage effect. In places, where the overburden works crossed saturated parts of the quaternary cover, there is a sudden drainage of aquifers. This water vents are regularly cause unres...

We analyze long term series of mean monthly river runoff in the period 1931–2007 to characterize drought severity in 118 gauging stations across the Czech Republic. A threshold level method is employed using Q95 discharge as the threshold to identify periods during which the flow is below limit and thus considered as drought. We use both annual and monthly variable threshold. The drought parameters are the deficit volume and the duration. We observe the relation between deficit volume and the physical and geograph...

Building industry is the most important market for energy by-products (EBP) - fossil fuel combustion products. The North West Bohemia region has been influenced by open pit coal mining. Fossil fuel combustion products are used in bulk at damaged territory reclamation. Check observation – monitoring – site of building reclamation mixtures on coal combustion product base was assembled according to preparatory documentation as a part of the solution of research task “Research of the physical and chemical properties o...

Climate change can alter the demand for water, with demands increasing during dry, warm periods and decreasing during cool, wet periods. Climate change may impact a municipality’s ability to provide water to existing customers and their planning for the future. New sources of water may be required, and the evaluation of these new sources should consider potential climate change. Land use activities exert pressure on water resources. To anticipate this change in climate and land use activities and to assess its imp...

The paper presents the evaluation of mine disasters statistics with particular reference to aerological disasters which took place in Polish coal mines from 1945 to 2008. These disasters concern the events which the death of five or more miners working in the mine underground. They were caused by: breakout or outflow of carbon dioxide, methane explosion, tremors and roof falls, explosion of coal dust, fires, heat strokes, water outflows or breakdown of mine equipment. The special attention was paid to fire prevent...

Abrasive waterjet machining (AWJ) with its wide ranging applications, offers a variety of advantages. It is very effective in machining materials which are hard to machine such as steel, composites and stones etc. The efficiency of the cutting process depends on several factors (e.g. hydraulic, nozzle and cutting). Kerf geometry, depth of cut, surface roughness and material removal rate are often used as target parameters. Although, several researchers studied the influence of process parameters on different mater...

With the ever growing urbanisation, crushed stone quarries, which were formerly remote from the cities, have neighboured the cities. On the other hand, the supply of the aggregates that are necessary to be used for the infrastructure of the cities has to be close to the cities. This necessity results with the consideration and evaluation of the crushed stone quarries in terms of their environmental impact. In this paper dust emission measurements of a stone quarry close to the city have been carried out by conside...

In the present study behavior of different footing anchors in reinforced soil subjected to vertical pullout loads were investigated. The plate anchors were considered as footings with their axis vertical and the study was made to plate anchors in cohesive non swelling clays. To carry out these studies number of laboratory tests were conducted on anchors of different shapes (circular, square and rectangular) and sizes in reinforced and non reinforced soil using three different Geosynthetics. It was concluded that o...

THMs in disinfection by products are especially important because of their potential carcinogenity. In this work two different liquid-phase microextraction methods namely US EPA 551 microextraction method and German DIN 38407 standard method were compared for the determination of trihalomethanes (THMs) including chloroform (CHCl3), bromodichloromethane (CHBrCl2), dibromochloromethane (CHBr2Cl) and bromoform (CHBr3) in water samples was developed, with analysis by gas chromatographyelectron capture detection (GC-EC...

Mineralogical composition of mining wastes deposited in voluminous tailing impoundments around the world is the key factor that controls retention and release of pollutants. Here we report geochemical and mineralogical investigation of one tailing impoundment from Slovakia. Ore deposit Rudňany was exploited from the end of 19th century and at 1963 the ore started to be extracted by flotation process (barite, siderite and sulfides). Waste after flotation was deposited into one tailing impoundment, which carries app...

In process of pig iron production besides main product, pig iron, also secondary products are formed, that have character of secondary raw materials and industrial wastes. The most abundant secondary product originating in the process of pig iron production, is blast furnace slag, its occurrence is about 300 to 500 kg for one ton of pig iron. Blast furnace slag originates from melting of gangue parts of metal bearing materials, slag forming additions and coke ash. Its chemical, mineralogical and physical – chemica...

Canal Bega traverses Romania (49 km) and Serbia (75 km) discharge through Tisa in the Danube River. Between 1760 and 1958 functioned as a waterway. After 2000, one proposed a strategy for the sustainable development of the canal: the canal rehabilitees, the source of the water supply, the emissary for the sewage, the irrigations, producing by the electric power, tourism and recreation. This paperwork is made an analysis of the sustainable development of the canal by introducing a computation scheme and realizing a...

The article deals with electronic documents based on Universal Business Language (UBL) 2.0 standard in the frame of business processes aimed at logistic. The article firstly describes information flow between small and medium enterprises in B2B environment. Secondly the article is describing identification of set of business documents that small and medium enterprises in Slovakia use for information exchange in business transactions and analyses why customization and localization of UBL 2.0 business documents is r...

The possibility to obtain a low cost petrurgical material by direct sintering of alkaline basaltic tuffs is demonstrated. The parent rock was milled for 10-15 min and the resulting powder was pressed at 100 MPa. The sintering and the phase formation in air and inert atmospheres were studied by dilatometry and DTA, respectively. The phase composition of obtained samples was evaluated by XRD whereas the stricture was highlighted in details by SEM. Some mechanical and thermal properties of the new materials were meas...

Fine grinding involves a large number of parameters in its operation. In this study, the effect of some parameters such as initial particle size, filling volume of the ball and ball size distribution on fine grinding of calcite powders (-200, -150 and -100 $\mu$m) using a laboratory stirred ball mill was studied under wet conditions. Zirconia beads (ZrSiO4) were used as grinding media with 1.0-1.2, 2.0-2.2 and 2.8-3.0 mm. A series of batch experiments using 2 3 full factorial designs was conducted to determine opt...

The environmental burdens, representing mainly the objects after the end of mining activity, heaps and setting pits, old landfills and areas of industrial companies, belong to most serious environmental problems in Slovakia today. The disposal of old environmental burdens is usually solved at the regional level, but some activities regarding the disposal are coordinated from the central level. The article deals primarily with issue of old environmental burdens from mining activity, which is marked by higher level ...

The Act on protection and conservation of cultural goods has been in force in the Republic of Croatia since 1999. It defines types of cultural goods and measures for their protection and conservation. The main authority for protection and conservation of cultural goods is the Ministry of Culture. This paper will describe geodetic works on saving a protected cultural monument. Results of the analysis of movement measurements over a longer time period will give insight into the real conditions and enable experts to ...

In this study a methodological framework is presented using tools and techniques of geoinformatics to quantify gully erosion. The study was conducted in the Fergusson catchment; a sub-catchment of the Daly river, Northern Australia. Various airborne and field based reconnaissance surveys have shown that the catchment in places is severely affected by gully erosion producing large amounts of sediment. The framework applied comprised of Cartosat-1 (2.5 m resolution) stereo imagery 2008, topographic maps 1:20,000, 1 ...

Drought is a stress factor that cause of limitation life activities and effects the vegetal production. Plants are the most important source that feeding necessity of the human population who increase rapidly. Drought stress, heat stress and heat shock, low heat and freezing, salinity and oxygen deficiency are the main stress factors that lead to plant growing. Because of these stress types, the biological mass and yield of plant usually decreases under of genetic potential at the end of growing season. Drought is...

Tunnel ’’St. Ilija’’ is on the road that connects the Makarska Riviera and a new highway through the mountain range Biokovo (Figure 1). With a length of 4250 m, it is currently fourth road tunnel in Croatia, but also the tunnel with greatest overburden of 1300 m. According to the available information this is a road tunnel with the biggest limestone overburden in Europe, and as such it represented a real challenge for all who participated in its construction. This article describes the geodetic works that are unde...