Artículos de revistas sobre el tema "Sano triangle"
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Bejjani, B. P., J. L. Houeto, M. Hariz, J. Yelnik, V. Mesnage, A. M. Bonnet, B. Pidoux, D. Dormont, P. Cornu y Y. Agid. "Aggressive behavior induced by intraoperative stimulation in the triangle of Sano". Neurology 59, n.º 9 (12 de noviembre de 2002): 1425–27. http://dx.doi.org/10.1212/01.wnl.0000031428.31861.23.
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Su, Mingxiao, Xiyun Jiao, Jiang Li, Shuyu Wu y Tianao Wu. "Accuracy and Reliability Analysis of Pipe Irrigation Metering Device for Sandy Water Source". Water 13, n.º 7 (30 de marzo de 2021): 947. http://dx.doi.org/10.3390/w13070947.
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Sandy water sources are widely distributed and are important for agricultural development. However, no explicit result has been achieved in the research of the accuracy and reliability of pipeline metering devices as well as flow rate measurement objects (water or water–sand) of different metering devices in the process of pipelines conveying muddy water. In this study, seven kinds of sediment concentration gradients, C0–C6 (0.2–7.19%), and three different flow velocities (1.0 m/s, 1.25 m/s, 1.5 m/s) were set up, and a comparison measuring method was used to compare the flow values of three kinds of metering device (electromagnetic flowmeter, ultrasonic flowmeter and water meter) with a right triangle weir. The accuracy and reliability of the metering device were obtained by analyzing the change law of the relative error between each metering device and the right triangle weir under different flow velocities and different sediment concentrations, and the flow rate measurement objects of each metering device were finally clarified. The relative error between the electromagnetic flowmeter and right triangle weir decreased gradually with the increase in the flow velocity when the sediment concentration was constant. The maximum difference of the relative error between the electromagnetic flowmeter and the right triangle weir was 2.53% when the flow velocity was constant. Additionally, the minimum differences of the relative errors of the ultrasonic flowmeter and water meter were 2.67% and 6.90%, respectively. The measured flow law of the electromagnetic flowmeter was more in line with the measured flow law of the water–sand mixture measured by the right triangle weir. However, the relative errors of water and water–sand measured by the ultrasonic flowmeter and water meter fluctuate greatly, which does not accord with the law of muddy water measured by the right triangle weir. The results showed that the electromagnetic flowmeter has the best reliability among the three metering devices, and the accuracy can be improved by calibration before use or increasing the flow velocity of the pipe network. Under the sand grading used in this study, the electromagnetic flowmeter was recommended to measure the flow rate of pipe irrigation for sandy water sources in this paper.
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Xu, Qingwei, Kaili Xu, Xiwen Yao, Jinjia Zhang y Ben Wang. "Sand casting safety assessment for foundry enterprises: fault tree analysis, Heinrich accident triangle, HAZOP–LOPA, bow tie model". Royal Society Open Science 5, n.º 10 (octubre de 2018): 180915. http://dx.doi.org/10.1098/rsos.180915.
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Sand casting operations, though commonplace, pose a significant threat of explosion accidents. This paper presents a novel sand casting safety assessment technique based on fault tree analysis, Heinrich accident triangle, hazard and operability–layer of protection analysis (HAZOP–LOPA) and bow tie model components. Minimal cut sets and minimal path sets are first determined based on fault tree analysis, then the frequency of sand casting explosion accidents is calculated based on the Heinrich accident triangle. Third, the risk level of venting quality can be reduced by adopting HAZOP–LOPA; the residual risk level of venting quality remains excessive even after adopting two independent protective layers. The bow tie model is then adopted to determine the causes and consequences of venting quality. Five preventative measures are imposed to enhance the venting quality of foundry sand accompanied by 16 mitigative safety measures. Our results indicate that the risk attributable to low foundry sand venting quality can be minimized via bow tie analysis.
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Saumade, Frédéric. "Chasseur, torero, boucher : le triangle sémantique du sang animal". L'Homme 35, n.º 136 (1995): 113–21. http://dx.doi.org/10.3406/hom.1995.370003.
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Dewangan, Shailesh Kumar. "Using the Soil Texture Triangle to Evaluate the Effect of Soil Texture on Water Flow: A Review". International Journal for Research in Applied Science and Engineering Technology 11, n.º 6 (30 de junio de 2023): 389–93. http://dx.doi.org/10.22214/ijraset.2023.53635.
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Abstract: Water flow through soil is a critical process that affects many aspects of soil health and environmental sustainability. Soil texture, which is the relative proportion of sand, silt, and clay particles in soil, plays a significant role in regulating water flow through soils. The soil texture triangle is a widely used tool for classifying soil texture based on the proportions of sand, silt, and clay particles. This review paper aims to evaluate the effect of soil texture on water flow through soils using the soil texture triangle. The paper presents an overview of the soil texture triangle and its applications in soil texture classification, followed by a discussion of the relationship between soil texture and water flow. The paper reviews existing literature on the impact of soil texture on water flow and summarizes the key findings. The review highlights the importance of soil texture in regulating water flow through soils and discusses the implications for soil management and environmental sustainability. The paper concludes by identifying areas for future research to improve our understanding of the relationship between soil texture and water flow.
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Hamlet-Metz, Mario y Dawn D. Eidelman. "George Sand and the Nineteenth-Century Russian Love-Triangle Novels". South Atlantic Review 60, n.º 4 (noviembre de 1995): 153. http://dx.doi.org/10.2307/3201248.
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Bertram, Douglas F. y Gary W. Kaiser. "Rhinoceros Auklet (Cerorhinca monocerata) Nestling Diet May Gauge Pacific Sand Lance (Ammodytes hexapterus) Recruitment". Canadian Journal of Fisheries and Aquatic Sciences 50, n.º 9 (1 de septiembre de 1993): 1908–15. http://dx.doi.org/10.1139/f93-213.
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We studied (1984–86) the diet of rhinoceros auklet (Cerorhinca monocerata) nestlings at three colonies on the British Columbia coast (Lucy islands, Pine Island, and Triangle Island). On the Lucy Islands, Pacific sand lance (Ammodytes hexapterus) dominated nestling food loads in all years. In 1985, 0+ sand lance dominated the nestling diet on all colonies. Concurrent measures of nestling growth rate, independent indexes of ocean production, and the proportion of sand lance in groundfish stomach samples were also highest in 1985. This suggests a linkage between ocean production, 0+ sand lance abundance, and events on seabird colonies over a broad geographic range. We emphasize the importance of sand lance to temperate seabirds and contrast British Columbia with areas where sand lance are commercially exploited. Rhinoceros auklet nestling diet, growth, and other data collected on colonies suggest that long-term monitoring on seabird colonies can contribute timely and inexpensive information on the recruitment of sand lance stocks in Canadian waters.
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HEMMINGS, F. W. J. "Review. George Sand and the Nineteenth-Century Russian Love-Triangle Novels. Eidelman, Dawn D." French Studies 50, n.º 2 (1 de abril de 1996): 211. http://dx.doi.org/10.1093/fs/50.2.211.
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Pan, Meihui, Yougui Chen, Zewen Hao, Chenlu Li, Huimin Zhao, Jinyu Wang y Yifu Gong. "Geochemical Characteristics and Environmental Implications of Surface Sediments from Different Types of Sand Dunes in the Dinggye Area, Southern Tibet". International Journal of Environmental Research and Public Health 19, n.º 17 (26 de agosto de 2022): 10628. http://dx.doi.org/10.3390/ijerph191710628.
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Geochemical characteristics of aeolian sand are beneficial for understanding sand dune formation and evolution. Few studies in the Dinggye area, Southern Tibet, have focused on the geochemical characteristics of aeolian sand. Thus, we present new geochemical data that provide insights into the geochemical characteristics and environmental implications of aeolian sands in the Dinggye area. The results show that mobile dunes, climbing sand sheets, and nebkhas show heterogeneity in elemental concentrations and UCC-normalized distribution; MgO, TiO2, Ni, Pb, and Nb are higher in mobile dunes; SiO2, CaO, K2O, Na2O, P2O5, V, Cr, Co, Cu, Ba, and Ce are higher in climbing sand sheets; and Al2O3, Fe2O3, La, Zn, As, Sr, Y, Zr, Rb, and Ga are higher in nebkhas. Principal component analysis (PCA) and correlation analysis indicate that the main factor affecting elemental content is grain size sorting, followed by provenance, while chemical weathering and regional precipitation are less influential. The CIA and A-CN-K triangle indicate that the different dune types are at a lower chemical weathering stage, with plagioclase weathering and decomposition first. The combination of grain size characteristics, elemental ratios, multidimensional scale (MDS), PCA, and geomorphological conditions suggest that the flood plain and the lakeshore are the main sand sources of aeolian sands in the Dinggye area.
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Zou, Hui y Hua Zhang. "Effects of Sand Blasting on the TBCs Fabrication Quality". Key Engineering Materials 531-532 (diciembre de 2012): 290–94. http://dx.doi.org/10.4028/www.scientific.net/kem.531-532.290.
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CoCrAlY bond coat(BC) and top ceramic coating(TCC) were fabricated on the GH99 super alloy by air plasma spray(APS), before TCC fabrication, BC was treated by sand blasting with different blasting parameters (blasting pressure, blasting speed). The roughness Ra of BC surface was obtained by orthogonal experiment design. Then, cross section morphology of TCC/BC interface were investigated by scanning electron micrograph(SEM), meanwhile TCC/BC interface stresses were analyzed based upon ABAQUS software using finite element method (FEM). The results show that, the roughness of bond coat surface increase first with increasing blasting pressure and speed, then decrease finally becomes stable. Both maximum tensile stress and compressive stress appear in TCC/BC interface area which is bigger in BC layer than that in TCC layer; With the increase of amplitude of interface triangle, the TCC/BC interface stress increase first then decrease until 7μm amplitude, then there appears a decrease of the interface stress.
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Knorr, Wilbur. "Ancient Versions of two Trigonometric Lemmas". Classical Quarterly 35, n.º 2 (diciembre de 1985): 362–91. http://dx.doi.org/10.1017/s0009838800040234.
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To justify certain steps of the computation developed in his Sand-Reckoner, Archimedes cites (without proof) the following inequalities relative to the sides of right triangles:if of two right-angled triangles, (one each of) the sides about the right angle are equal (to each other), while the other sides are unequal, the greater angle of those toward [sc. next to] the unequal sides has to the lesser (angle) a greater ratio than the greater line of those subtending the right angle to the lesser, but a lesser (ratio) than the greater line of those about the right angle to the lesser.That is, with reference to the two right triangles ABG, DEZ (Fig. 1), where AG equals DZ and the angle at B is greater than that at E, ZE:GB < angle B:angle E < DE:AB.
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ANDRADE, ROBERTO CARLOS OLIVEIRA DE, MARCO ANTONIO DOMINGUES TEIXEIRA y MARCELO LEÃO. "IMPACTOS DA HIDRELÉTRICA DE SANTO ANTÔNIO NA CONFIGURAÇÃO ESPACIAL DO BAIRRO TRIÂNGULO (PORTO VELHO/RO)". GOT - Journal of Geography and Spatial Planning, n.º 23 (31 de julio de 2022): 79–99. http://dx.doi.org/10.17127/got/2022.23.005.
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Peoples who live on the banks of Amazonian rivers carry habits and economic, cultural, spatial heritages and their territories are at the mercy of the natural dynamics of these rivers. From the 2014 flood, families in the Triângulo neighborhood in Porto Velho/RO, in addition to losing part of their economy, the catastrophe involved (1) misconfigured accesses; (2) flooded homes and (3) unassisted families. The question we ask is: what were the impacts of the Santo Antônio HPP on the spatial configuration of the Triângulo neighborhood after its installation? The work aims to examine the impacts on the spatial configuration of the lower area of the Triangle neighborhood and the methodological process is divided into three stages (1) literature review, (2) planialtimetric survey and visits to the neighborhood and (3) representation, modeling and tooling treatment. The study points out that the enterprise compromised extractive activities, disrupted private properties and public elements, resulting in losses for the local population and its surroundings.
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Agus Tri Windarta, Muchtar y Didik Purwantoro. "Pengaruh Penempatan Tirai Segitiga Lurus dan Segitiga Lengkung terhadap Kedalaman Gerusan Lokal". INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur 12, n.º 2 (16 de enero de 2017): 164–72. http://dx.doi.org/10.21831/inersia.v12i2.12591.
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ABSTRACT Pier is part of the bridge which is the most important because it serves to hold the weight of bridge and the weight of the charge passing through it. Then development on the pier of the bridge particularly on stability against local scouring due to the influence of the flow of river water to note. This test aims to find out the influence of variations in the placement of the curtains triangle straight and curved triangle. This study using models pier observation as a means of testing with parameters of depth of flow and discharge of water, with a height of 10 cm, the sand discharge flow 1.09 l/sec. The test Objects this uses pipe PVC with a diameter of 2,6 cm high pier, 25 cm as the pier for testing. Testing it uses a standard tilting flume. Testing done twice with the variation form of the curtain striangle straight and curved triangle. Based on the results of testing conclusion can be obtained that depth of scouring at point A on the pier using a variation of the curtain triangle straight can reduce the scouring of 70% while in the triangular curve blinds reduce scouring amounted to 66%, the depth of scouring in point B and D on the pier using a variation of the curtain triangle straight can reduce the scouring amounting to 72% while in the triangular arch blinds reduce the scouring amounting to 51%, and depth of scouring in point C on the pier using a variation of the triangle straight curtain can reduce scouring of 88% while in the triangle blinds arch reduce the scouring of 66%. Keywords: depth of scouring, variety of curtains. ABSTRAK Pilar merupakan bagian dari jembatan yang paling penting karena berfungsi untuk menahan berat badan jembatan itu sendiri dan berat muatan yang melintasinya. Maka pembangunan pada pilar jembatan terutama pada kestabilan terhadap gerusan lokal akibat pengaruh aliran air sungai perlu diperhatikan. Pengujian ini bertujuan untuk mengetahui pengaruh variasi penempatan tirai segitiga lurus dan segitiga lengkung. Kajian ini menggunakan model pilar sebagai alat pengamatan pengujian dengan parameter kedalaman aliran dan debit air sama, dengan ketinggian pasir 10 cm, debit aliran 0.99 lt/det. Benda uji ini menggunakan pipa PVC dengan diameter 2,6 cm, tinggi pilar 25 cm sebagai model pilar untuk pengujian. Pengujian ini menggunakan standard tilting flume. Pengujian dilakukan dua kali dengan variasi bentuk tirai segitiga lurus dan segitiga lengkung.Berdasarkan hasil pengujian dapat diperoleh kesimpulan bahwa kedalaman gerusan di titik A pada pilar yang menggunakan variasi tirai segitiga lurus dapat mengurangi gerusan sebesar 70% sedangkan pada tirai segitiga lengkung mengurangi gerusan sebesar 66%, kedalaman gerusan di titik B dan D pada pilar yang menggunakan variasi tirai segitiga lurus dapat mengurangi gerusan sebesar 72% sedangkan pada tirai segitiga lengkung mengurangi gerusan sebesar 51%, dan kedalaman gerusan di titik C pada pilar yang menggunakan variasi tirai segitiga lurus dapat mengurangi gerusan sebesar 88% sedangkan pada tirai segitiga lengkung mengurangi gerusan sebesar 66%.Kata kunci: kedalaman gerusan, variasi tirai.
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Sanchez, Alexandra J. "“Bluebeard” versus black British women’s writing". English Text Construction 13, n.º 1 (24 de julio de 2020): 1–21. http://dx.doi.org/10.1075/etc.00032.san.
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Abstract Helen Oyeyemi’s 2011 novel Mr. Fox artfully remasters the “Bluebeard” fairytale and its many variants and rewritings, such as Jane Eyre and Rebecca. It is also the first novel in which Oyeyemi does not overtly address blackness or racial identity. However, the present article argues that Mr. Fox is concerned with the status of all women writers, including women writers of colour. With Mr. Fox, Oyeyemi echoes the assertiveness and inquisitiveness of Bluebeard’s last wife, whose disobedient questioning of Bluebeard’s canonical authority leads her to discover, denounce, and warn other women about his murderous nature. A tale of the deception and manipulation inherent in storytelling, Mr. Fox allows for its narrative foul play to be exposed on the condition that its literary victims turn into detective-readers and decipher the hidden clues left behind by the novel’s criminal-authors. This article puts the love triangle between author St. John Fox, muse Mary, and wife Daphne under investigation by associating reading and writing motifs with detective fiction. Oyeyemi’s ménage à trois can thus be exposed as an anthropomorphic metaphor for the power struggle between the patriarchal literary canon, established feminist literature, and up-and-coming (black British) women writers, incarnated respectively by Mr. Fox, Mary Foxe, and Daphne Fox.
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Reizman, Laura Ha. "(Re)mapping the Yanggongju and the Camptown in Shin Sang-ok's Hellflower". Feminist Media Histories 6, n.º 2 (2020): 43–66. http://dx.doi.org/10.1525/fmh.2020.6.2.43.
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The Korean War (1950–53) changed the material and affective landscape of the Korean peninsula and ushered in a new era ruled by a military dictatorship dependent on US military power. With bases dotting the South Korean peninsula, former agricultural villages became camptowns that catered to the needs of American soldiers. This article focuses on the South Korean melodrama Chiokhwa (Hellflower, 1958), directed by Shin Sang-ok, which narrates a love triangle between two brothers and Sonya, a camptown prostitute or yanggongju. It examines the role of the postwar environment in constructing the spaces of the subject. Using the yanggongju figure as a technology of postwar memory, this work reevaluates the ecology of ruination left in the wake of the Korean War—as portrayed through Sonya, scenes of the city, the camptown, the base, and the surrounding fields and marshes—to explore the sense of loss and displacement of this period.
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Hidayati, Ilya. "PENGENALAN BENTUK GEOMETRI MELALUI PENERAPAN MEDIA PASIR KINETIK UNTUK ANAK USIA 2-3 TAHUN DI PPT MAWAR 01AR-RACHMAN SURABAYA". MOTORIC 4, n.º 1 (1 de junio de 2020): 100–109. http://dx.doi.org/10.31090/m.v4i1.891.
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cognitive understanding to recognize geometric shapes. To overcome this problem, researcher tried to deliver learning through the kinetic sand medium that can be one of the interesting alternative to be a learning medium. This study used a Class Action Research (CAR) method. The results showed a gradual improvement in the ability to recognize geometric shapes by playing kinetic sand. The increased ability to know the geometric shapes can be seen on the indicator of the ability to know, understand, and apply of the geometric shapes in playing. Children's ability to recognize shapes through playing the geometric kinetic sand was increased from 27.7% (pre-action stage) to 56% (in the first cycle) and increased to 85% (the second cycle). The steps that can improving the ability to recognize geometric shapes through the playing medium of kinetic sand are through recognizing the shapes of circles, triangles, quadrangles, rectangles, grouping large and small, grouping objects according to their shape, knowing the process (the causes-effects), and the enthusiasm of children in carrying out activities from the beginning to the end.
Keywords: kinetic sand, learning medium, cognitive development.
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Budimansyah, Budimansyah, Baharuddin Baharuddin y Hamdani Hamdani. "Mapping of Substrate Categories Changes in Exposure to Coral Reefs Using Alos Avnir-2 and Spot 7 Images in The South Area of Kotabaru District". TROPICAL WETLAND JOURNAL 5, n.º 2 (25 de noviembre de 2019): 51–62. http://dx.doi.org/10.20527/twj.v5i2.75.
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The South of Pulau Laut is an area in the which is included in the Coral Triangle and Aquatic Conservation Areas. The purpose of this study was to map changes in the extent of coral reefs based on the class of substrate categories and objects on exposure to coral reefs in the southern waters of Sea Island within 6 years from 2011- 2017 using SPOT 7 satellite imagery in 2017 and AVNIR ALOS-2 in 2011. Using the method of Lyzenga Dept Index for basic invariant detection of waters. Based on the results of substrate-based classification using both satellite images overlaye, there has been a decline for the coral category as much as -19.21 ha, seagrass and algae as much as -3.57 ha. On the Contrary, the category of open substrate has Increased by 22.77 ha. Object-based classification results using the Object Based Image Analysis (OBIA) method have a reduction in area for the hard coral category (HC) of -1.66 ha, hard sand mixed with sand (HC S) of -15.99 ha, dead coral overgrown with algae and sand (DCA S) of -0.39 ha, algae and seagrass (FS) covering an area of -1.65 ha, sand-mixed coral fragments (RS) of 4:45 ha. On the other hand, there was an increase of in the area.
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Al-Jubouri, Muhanad y Richard P. Ray. "Hydrodynamic Modeling and Comprehensive Assessment of Pier Scour Depth and Rate Induced by Wood Debris Accumulation". Hydrology 11, n.º 4 (9 de abril de 2024): 52. http://dx.doi.org/10.3390/hydrology11040052.
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This study mainly investigates the impact of debris accumulation on scour depth and scour hole characteristics around bridge piers. Through controlled experiments with uniform sand bed material, the influence of various debris shapes (high wedge, low wedge, triangle yield, rectangular, triangle bow, and half-cylinder), upstream debris length, downstream debris extension, and debris thickness on scour depth and scour hole area and volume around the cylindrical pier were analyzed. The findings revealed that the shape and location of debris in the water column upstream of piers are key factors that determine the depth of scour, with high wedge shapes inducing the deepest scour and potentially the largest scour hole, particularly when positioned close to the pier and fully submerged. Scenarios in which triangle bow debris was submerged at full depth upstream of the pier closely resembled situations devoid of debris. Conversely, debris extension downstream of the pier was found to reduce local scour depth while concurrently enlarging the dimensions of the scour hole. The existing scour prediction equations tend to overestimate scour depth in scenarios involving debris, particularly when applying effective and equivalent pier width. This discrepancy arises because these equations were originally developed to predict scour depth around piers in the absence of debris. In response, a refined model for predicting scour induced by debris was proposed, integrating factors such as upstream debris length, downstream extension, obstruction percentage, and debris shape factor. This model demonstrated strong agreement with experimental data within the scope of this study and underwent further validation using additional experimental datasets from other research endeavors. In conclusion, this experimental study advances the comprehension of scour processes around cylindrical bridge piers, providing valuable insights into the role of debris characteristics and positioning.
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Bugajev, Andrej, Gerda Jankevičiūtė y Natalija Tumanova. "The Mathematical Modelling of Heat Transfer in Electrical Cables". Electrical, Control and Communication Engineering 5, n.º 1 (1 de mayo de 2014): 46–53. http://dx.doi.org/10.2478/ecce-2014-0007.
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Abstract This paper describes a mathematical modelling approach for heat transfer calculations in underground high voltage and middle voltage electrical power cables. First of the all typical layout of the cable in the sand or soil is described. Then numerical algorithms are targeted to the two-dimensional mathematical models of transient heat transfer. Finite Volume Method is suggested for calculations. Different strategies of nonorthogonality error elimination are considered. Acute triangles meshes were applied in two-dimensional domain to eliminate this error. Adaptive mesh is also tried. For calculations OpenFOAM open source software which uses Finite Volume Method is applied. To generate acute triangles meshes aCute library is used. The efficiency of the proposed approach is analyzed. The results show that the second order of convergence or close to that is achieved (in terms of sizes of finite volumes). Also it is shown that standard strategy, used by OpenFOAM is less efficient than the proposed approach. Finally it is concluded that for solving real problem a spatial adaptive mesh is essential and adaptive time steps also may be needed.
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Minasny, Budiman, Alex B. McBratney, Damien J. Field, Grant Tranter, Neil J. McKenzie y Daniel M. Brough. "Relationships between field texture and particle-size distribution in Australia and their implications". Soil Research 45, n.º 6 (2007): 428. http://dx.doi.org/10.1071/sr07051.
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This paper aims to establish the means and ranges of clay, silt, and sand contents from field texture classes, and to investigate the differences in the field texture classes and texture determined from particle-size analysis. The results of this paper have 2 practical applications: (1) to estimate the particle size distribution and its uncertainty from field texture as input to pedotransfer functions, and (2) to examine the criteria of texture contrast soils in the Australian Soil Classification system. Estimates of clay, silt, and sand content for each field texture class are given and this allows the field texture classes to be plotted in the texture triangle. There are considerable differences between field texture classes and particle-size classes. Based on the uncertainties in determining the clay content from field texture, we establish the probability of the occurrence of a texture contrast soil according to the Australian Soil Classification system, given the texture of the B2 horizon and its overlying A horizon. I enjoy doing the soil-texture feel test with my fingers or kneading a clay soil, which is a short step from ceramics or sculpture. Hans Jenny (1984)
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Fang, Yan Feng, Hua Xi Gao, Wei Wei Duan y Zhong Jian Sun. "Theoretical Analysis and Experimental Research on Upward Capacity of Screw Anchor". Advanced Materials Research 243-249 (mayo de 2011): 3029–35. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.3029.
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Based on eight groups of uplift tests for screw anchors with different embedded depths and different plate sizes, a method is given to compute the bearing capacity of screw anchor within critical depth in coarse sand according to analysis on force transmission route and failure characteristics. Within critical depth, bearing capacity of screw anchor is proportionate to embedded depth and the area of screw plate, and the failure surface is inverse triangle in shape. Beyond critical depth, the bearing capacity of screw anchor won’t increase with depth, and the failure surface is funnel in shape. Critical depth is about 10 times the diameter of screw plate. In both cases, the include angle between failure surface and the vertical plane equals to 0.5 time the friction angle of the soil.
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Lyudmila, Solonenko, Repyakh Sergei y Uzlov Kostiantyn. "Sand-sodium-silicate mixtures grains composition optimization for structuring by steam-microwave solidification method". Theory and practice of metallurgy 1,2021, n.º 1,2021(126) (22 de febrero de 2021): 28–38. http://dx.doi.org/10.34185/tpm.1.2021.05.
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Abstract. Mixture sizes of sand-sodium-silicate conglomerates and sodium silicate solute content in them influences on the basic physical and technological indicators of molding and core mixtures structured in steam-microwave environment have been investigated. Sand-sodium-silicate mixture structured by steam-microwave environment (steam-microwave solidification method – SMS-process) composition has been optimized. Standard and generally accepted methods and techniques of molding mixtures investigation have beenused in this study. For mixtures manufacturing have been used: quartz sand brand 1K2O202; sodium silicate solute with silicate modulus of 2.8…3.0 and specific gravity of 1.42…1.44 g/cm3. Quartz sand cladding has been implemented with 0.5 and 2.5% sodium silicate solute (by weight, over 100% sand). Sand-sodium-silicate conglomerates have been scattered in sieves and conglomerates with sizes less than 0.315mm and with sizes from 0.315 to 0.63mm have been used for research. Mixture composition has been optimized according to results of simplex planning and experimental data by simplex triangles constructing and superimposing their formatted images on each other with darkened fields between isolines that do not meet of each parameters required level. To plot simplex lattices, model with simplex lattice plan of incomplete cube in Scheffe’s triple system has been used. For the first time, influence of mixture sand-sodium-silicate conglomerates sizes and sodium-silicate-solute content in them on basic indicators of mold and rod mixtures structured in steam-microwave environment has been established, and their composition has been optimized. Data obtained will be useful in molds and rods structured by SMS-process manufacturing. They will have predictable indicators of properties that correspond to their allowable level. Optimal composition of sand-sodium-silicate mixture, structured by SMS-process, is mixture of quartz sand, part of which passed through sieve with cell of 0.315 mm and have sodium silicate solute content (МSiO2=2.8…3.0, 2=1.42…1.44 g/сm3) in amount of 1.5% (by weight, over 100% quartz sand). Keywords.Sand, silicon silicate solute, steam-microwave solidification, optimization, conglomerates, strength, gas permeability, crushability, density, beam deflection, knockout energy.
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Jiang, Guo-Hui, Yu-Qing Li, Li Zhang y Senyan Jiang. "Research on the Mixture Ratio Test for Rubble-Built Structure Mortar Filling Construction Technology". Science of Advanced Materials 12, n.º 6 (1 de junio de 2020): 915–20. http://dx.doi.org/10.1166/sam.2020.3769.
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Traditionally the rubble-built structures are constructed manually with low efficiency and long time consuming. It is studied in this research that the rubble-built structures are constructed with models according to designed profile. Firstly, the natural stones are piled up inside the model and then filled with self-compacting mortar into the inter-space of the stones at certain flow rate, and at last the models are removed after the mortar get hardened, so as to form the rubble-built structures with fast and mechanical construction process. The water and cement-sand mixture ratio for this construction process shall satisfy high flowability for flowing into the gaps of stones and also ensure the compressive strength of the structure. An indoor triangle box filling test is carried out to prove that the designed mixture ratio for filling the rubble-built structure is feasible and to determine the optimized mortar proportioning ratio.
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S. Jamill, Abeer y Hassan O. Abbas. "Compressive Capacity of Triangular Screw Piles Group Embedded in Soft Clay". Diyala Journal of Engineering Sciences 13, n.º 4 (9 de diciembre de 2020): 44–49. http://dx.doi.org/10.24237/djes.2020.13406.
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Screw piles are used in different projects such as underpinning, lateral support of retaining wall, foundation of tower and under pipeline. In recent years, the use of screw piles became wide in all world as a result of low cost, ease of installation and need simple machines to construct. A laboratory study of triangle pattern of screw piles group embedded in soft clay and extended to sand soil layer is carried out. Different parameters are investigated such as spacing between piles, number of helix plates and slenderness ratios L/ D. The results of this study showed that the efficiency of screw piles group increases when group extended to sandy layer. Also, a study showed that the compressive capacity of triangular pattern group decreases with increase spacing between piles for group of single and double helix plates. The percent’s of reduction are (61, 22, 15) % and (56, 25, 29) % for single and double helix group respectively
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Pang, Jiayang, Xiao Chang, Yuanyuan Gang, Ziyao Zhou, Wenping Xiang, Lingjiu Zhou, Xiaobing Liu y Zhengwei Wang. "Design and Study of a Sediment Erosion Test Device for a Single-Flow Channel in the Guide Apparatus of a Reaction Hydraulic Turbine". Journal of Marine Science and Engineering 12, n.º 5 (7 de mayo de 2024): 777. http://dx.doi.org/10.3390/jmse12050777.
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Sediment erosion damage is one of the main causes of structural failure in reaction turbine units. To study the mechanism through which sediment erosion affects the water-guiding mechanism of a reaction turbine unit, this study obtained the average concentration and particle size of sediment during the flood season based on the statistics of the measured sediment data from the power station. Additionally, the characteristics of the solid–liquid two-phase flow of the diversion components of the reaction hydraulic turbine were numerically calculated. Based on the velocity triangle change in the guide apparatus and the flow similarity principle, a flow-around wear test device for the guide apparatus of the reaction turbine was designed. Furthermore, the similarity of the sand–water flow field between the guide apparatus of the prototype unit and the test device was compared and analyzed. The results demonstrated that the sand–water flow field of the diversion components of the prototype unit was axisymmetric and exhibited a potential flow distribution. Additionally, uniform sand–water flow occurred within the guide apparatus, with a small sand–water velocity gradient near the wall of the stay vanes (SV) and the guide vanes (GV). The maximum volume fraction of sediment particles was observed in the tailing area of the spiral casing, indicating an enrichment phenomenon of sediment particles. The velocity of the sediment particles on the surface of the guide vane in the single-channel sediment wear test device and prototype unit ranged from 6.2 to 7.8 m/s, and the velocity of the sediment particles on the surface of the stay vane ranged from 5.1 to 14.6 m/s, and the difference of the sediment particles’ velocity near the wall was 1 to 3 m/s. The trailing vorticity of the guide vane reached a maximum of 120 s−1. Consequently, the single-channel sediment erosion test device can unveil the sediment erosion mechanism of the guide apparatus of a reaction turbine.
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Kryštufek, Boris, Cătălin Stanciu, Danijel Ivajnšič, Sidi Imad Cherkaoui y Franc Janžekovič. "Facts and misconceptions on the Palaearctic existence of the striped ground squirrel". Mammalia 82, n.º 3 (25 de abril de 2018): 248–55. http://dx.doi.org/10.1515/mammalia-2017-0060.
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Abstract The striped ground squirrel has a wide distribution in the Ethiopian region but is restricted to a small isolated area in Palaearctic Africa. This fragment was first recorded in the late 1940s in the Souss Valley (Morocco), however, not a single new observation has been published in the following decades. In September 2016 we surveyed the Souss Valley and found squirrels at 43 sites within the triangle between Agadir–Taroudant–Tiznit. Occupied sites were not distributed at random but occurred between an altitude of 45–254 m and on a substrate with coarse texture containing >65% sand. The vast majority of the sites with squirrels (69%) were classified as suburban, cultivated or both. Habitat suitability was estimated by applying geographically weighted logistic regression analysis. The influence of local predictor variables varied across the study area indicating the heterogeneous effects on the determination of the occurrence of the species. The modelled highly suitable habitat area for the striped ground squirrel in Morocco covers almost 690 km2 and only marginally overlaps the range for the species reported in the literature.
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Kropachev, Ivan I., Nikolai L. Orlov, Hoa Thi Ninh y Tao Thien Nguyen. "A New Species of Rhacophorus Genus (Amphibia: Anura: Rhacophoridae: Rhacophorinae) from Van Ban District, Lao Cai Province, Northern Vietnam". Russian Journal of Herpetology 26, n.º 6 (15 de diciembre de 2019): 325–34. http://dx.doi.org/10.30906/1026-2296-2019-26-6-325-334.
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We describe a new species of the Rhacophorus genus, which differs from all species known in Asia by the combination of characters. It strongly differs also from small and middle-sized species of Rhacophorus sensu lato: Rhacophorus calcaneus Smith, 1924, Leptomantis cyanopunctatus (Manthey et Steiof, 1998), Rhacophorus hoabinhensis Nguyen, Pham, Nguyen, Ninh et Ziegler, 2017, Rhacophorus hoanglienensis Orlov, Lathrop, Murphy et Ho, 2001, Zhangixalus jarujini (Matsui et Panha, 2006), Rhacophorus laoshan Mo, Jiang, Xie et Ohler, 2008, Rhacophorus pardalis Günther, 1858, Rhacophorus rhodopus Liu et Hu, 1960, Rhacophorus robertingeri Orlov, Poyarkov, Vassilieva, Ananjeva, Nguyen, Sang, and Geissler, 2012, Leptomantis robinsonii (Boulenger, 1903), Rhacophorus spelaeus Orlov, Gnophanxay, Phimminith, and Phomphoumy, 2010, Rhacophorus translineatus Wu, 1977, Rhacophorus turpes Smith, 1940, Rhacophorus vampyrus Rowley, Le, Thi, Stuart et Hoang, 2010, Rhacophorus viridimaculatus Ostroshabov, Orlov et Nguyen, 2013 by having brown color with two green dorsolateral stripes starting at the groin level and connecting through the distal part of eyelid with green triangle on the head, slender body and head, lower ratio HW/HL 0.86, lower HW/SVL 0.28 and lower ratio HL/SVL 0.32.
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Hmood, Noor y Mohammed S. Shamkhi. "Soil Properties Study for the Western Side of Kut City, Iraq". Wasit Journal of Engineering Sciences 11, n.º 1 (1 de abril de 2023): 61–65. http://dx.doi.org/10.31185/ejuow.vol11.iss1.365.
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Soil properties checks and classification are an important part of any engineering project as they directly affect buildings as well as agriculture and others. The research aims to create an integrated database for soil properties in the study area, which is the western side of the city of Kut, to know its relationship to groundwater in the region. Laboratory tests were conducted for five soil samples from the Bar Drilling sites to monitor the movement of groundwater in the area. Soil samples were taken when drilling and upon reaching the groundwater level, which was approximately 6 meters sieve analysis, hydrometer, specific gravity, and hydraulic conductivity were also conducted, as well as the content of chlorides and sulfates in the soil was calculated. For classifying testure of the soil, the triangle of US agriculture department was utilized, soil can be divided into groups by this triangle based on clay, silt and sand proportion. Results of examination of soil texture showed that the soil in the first was Clay loam and the second point was Silty Clay loam and in the third point, it was sandy clay loam, while in the fourth point it was silty clay loam and it was in the fifth point silt loam As shown in Table 1. The specific gravity was measured in the field, and the lowest value was 2.65 in the third well, while the highest value was 2.70 in the fifth well. The hydraulic conductivity of the five well points was calculated and was close to each other and considered as an average value of hydraulic conductivity equal to 0.013522. The content of chlorides and sulfates in the soil was calculated due to its importance in knowing the chemical properties. The results showed that the value of the chlorides ranged between (0.154 - 1.72) %, while the values of the sulfate content in the soil ranged between (0.930 - 3.11) %.
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Burger, Alan E., Rory P. Wilson, Don Garnier y Marie-Pierre T. Wilson. "Diving depths, diet, and underwater foraging of Rhinoceros Auklets in British Columbia". Canadian Journal of Zoology 71, n.º 12 (1 de diciembre de 1993): 2528–40. http://dx.doi.org/10.1139/z93-346.
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Rhinoceros Auklets (Cerorhinca monocerata) were studied at Triangle Island, Cleland Island, and Seabird Rocks, British Columbia, in 1986–1989. Epipelagic schooling fish were consistently the most common prey delivered to auklet chicks at all three localities. Pacific sand lance (Ammodytes hexapterus), Pacific herring (Clupea harengus), juvenile salmon (Onchorhyncus spp.), Pacific saury (Cololabis saura), and juvenile rockfish (Sebastes spp.) were important prey. Bite marks on the fish showed that 73% were attacked from below. The mean deepest depth recorded for 16 auklets was 30 m (range 12–60 m). Eleven time-at-depth records showed that the auklets were epipelagic foragers: 90% of the mean underwater time was spent in the upper 10 m, although most birds had a few deeper dives of 20–60 m. Shipboard transects showed that Rhinoceros Auklets usually foraged in water considerably deeper than 15 m. A model of diving efficiency indicated that a relatively large proportion (> 40%) of the average dive cycle was spent foraging rather than travelling or resting, and prolonged dives invoking anaerobic glycolysis were avoided. We discuss the implications of diving limitations on foraging behaviour and the use of Rhinoceros Auklets as indicators of prey availability.
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Wang, Chengtao, Min Chen, Hongshuai Qi, Wichien Intasen y Apichai Kanchanapant. "Grain-Size Distribution of Surface Sediments in the Chanthaburi Coast, Thailand and Implications for the Sedimentary Dynamic Environment". Journal of Marine Science and Engineering 8, n.º 4 (2 de abril de 2020): 242. http://dx.doi.org/10.3390/jmse8040242.
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This paper analyzes the grain-size distribution of surface sediments of the Chanthaburi coast of Thailand to investigate the sedimentary environment and its evolution to better use and protect the coast. The Flemming triangle method, the grade-standard deviation method, and the Gao–Collins grain-size trend analysis method (GSTA model) were used to study the dynamic sedimentary environment of the area and provide preliminary identification of source materials. There are seven types of surface sediments on this coast, with grain sizes (φ) generally consisting of sand and silt. Sorting is generally poor, and becomes gradually poorer with distance offshore. Skewness is generally positive. The study area is mainly composed of sand and silt, indicating that the hydrodynamics are strong. The results of grade-standard deviation analysis indicate that sediment grain size b (3.25–4.5φ) is a sensitive indicator of environmental change. This sediment type exhibits a relatively complex transport trend, mainly characterized by northwestward and northeastward transport from sea to land. Sediments at the mouth of the Chanthaburi Estuary and the Welu River fluctuate under the influence of tidal currents. Based on the results of grade-standard deviation analysis and grain-size trend analysis, the study area was divided into three provinces, representing different sedimentary environments and material sources. Compared with tidal-controlled estuaries in the temperate regions of eastern China, the two tropical estuaries examined in this study exhibited smaller suspended sediment loads, runoff amounts, and tidal ranges. However, hydrodynamic conditions were generally stronger. The main reasons for the similarities and differences in the transport trends of sediments in these estuaries were differences in hydrodynamic conditions and the specifics of regional topography.
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Adjeleian, J., M. Allen, J. L. Humar y G. McRostie. "National aviation museum, Ottawa". Canadian Journal of Civil Engineering 13, n.º 6 (1 de diciembre de 1986): 722–32. http://dx.doi.org/10.1139/l86-107.
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This paper describes various aspects of the design and construction of a new building for the National Aviation Museum, currently nearing completion on a site on the Rockliffe Airport, Ottawa. The museum will house the aeronautical collection now displayed in World War II hangars.The new museum building is shaped like an isosceles right-angled triangle with a short side 161 m long and a clear height of 13.2 m from the floor to the underside of the roof framing. A two-storey wing on the west side contains the public entrances and the administrative offices.The soil at the site consists of a deep layer of preconsolidated sensitive clay underlain by dense glacial till containing boulders, then a layer of dense sand with gravel and boulders. The main columns of the building are supported by 55 m deep piles driven to suitable resistance in the dense sand and boulder layer, while the perimeter columns rest on spread footings, supported on the surface clay layer.The roof structure, which is one of the largest of its kind, consists of a space truss with top and bottom chords staggered with respect to each other and laid on a square grid 3.3 m by 3.3 m. The depth of the roof framing is also 3.3 m.The paper presents details of subsurface exploration and the types of foundations used. The structural framing for the roof as well as the steps involved in the analysis and design of the roof are described. Also presented are details of the fabrication methods, weld testing, and erection procedures. Key words: National Aviation Museum (Ottawa), pile foundations, dynamic testing, structural steel, space truss, welded joint, ultrasonic weld inspection.
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Muk Minah, Maghfiroh Sa Adatul y Nur Izzati. "Etnomatematika pada Makanan Tradisional Melayu Daik Lingga Sebagai Sumber Belajar". JURNAL EKSAKTA PENDIDIKAN (JEP) 5, n.º 1 (30 de mayo de 2021): 1–7. http://dx.doi.org/10.24036/jep/vol5-iss1/552.
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The purpose of this study was to find mathematical activities in the Daik Lingga culture. This research focuses on the ethnomatematic exploration of the traditional Malay food of Daik Lingga which can be used as a source of learning mathematics. Daik's traditional food is generally made from sago. This research is a qualitative type and uses an ethnographic approach. The data collection technique was carried out by interviewing related sources and documentation. The data analysis technique was based on the design of Miles and Huberman by reducing data, presenting data, and concluding/ verification. Based on the results of data collection, there are several mathematical elements in the traditional Malay food of Daik Lingga. The mathematical elements contained include shapes (circles and right triangles), space shapes (cones), folding symmetry, reflection, rotation, acute angles, right angles, and parallel lines. Therefore, Daik Lingga's traditional food can be used as a source of interesting mathematics learning for students so that learning becomes meaningful.
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Garcia, V. y R. Devesa. "Supply of blends of desalinated seawater: effects on the flavour". Water Supply 9, n.º 1 (1 de marzo de 2009): 75–80. http://dx.doi.org/10.2166/ws.2009.874.
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The metropolitan area of Barcelona suffers from a well known lack of water resources. To mitigate this situation the El Prat Desalination Plant, a seawater reverse osmosis (RO) facility, is scheduled to come into operation during 2009. The network management project foresees supply in the southern area of the city of a blend of desalinated seawater and water from the River Llobregat. The latter could be treated in two ways: by conventional treatment consisting of the predioxychlorination, clarification, sand filtration, GAC filtration and postchlorination stages, or by means of this same process with an additional electrodialysis reversal (EDR) stage prior to postchlorination. In this study, an estimation of the organoleptic characteristics of the blends was carried out by trained and untrained sensory panels. The water samples for tasting were RO desalinated seawater (Tordera Plant), treated water from the Llobregat (Sant Joan Despí water treatment plant working under adequate conditions for the study), and the effluent from an EDR pilot plant. The results of the ranking, scoring and triangle difference tests indicated that the quality of the 50/50 blends improved in relation to the water from the Llobregat, although without reaching the level of quality of the water from the Ter basin, Barcelona's other important resource (North area).
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Suryani, Herni y Ratna Husain. "Studi Provenance Endapan Pasir Sungai Budong-budong, Kabupaten Mamuju, Provinsi Sulawesi Barat". Jurnal Azimut 4, n.º 2 (30 de diciembre de 2022): 68. http://dx.doi.org/10.31317/jaz.v4i2.841.
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The reseach area administratively located in Budong-budong District, Mamuju Regency, West Sulawesi Province. The purpose of this study is to determine the provenance of sand sediments at Budong-budong River based on petrographic analysis of QFL (quartz, feldspar and rock fragments) components. There are seven representative samples namely HRN/BD-01, HRN/BD-02, HRN/BD-03, HRN/BD-04, HRN/BD-05, HRN/BD-06, HRN/BD-07 that will be observed by its optical properties. Based on genetic classification (Krynine, 1963, in Folk, 1980) and empirical classification (Folk, 1980) of quartz mineral grains, there are three types of quartz that can be identified; 1). Monocrystalline quartz with a sub-equant to elongated shape, dark straight to oblique waves (originally from granite and gneiss); 2). Composite polycrystalline quartz with sub-equant to elongated shape, straight dark to slanted wavy, straight and crenulated boundaries between crystals (derived from recrystallized metamorphic rocks); 3) Composite polycrystalline quartz with elongated shape, strongly wavy darkening, and straight/smooth, crenulated, and granulated inter-crystal boundaries (derived from depressed metamorphic rocks). The source rock of the reseach area based on point-counting result of quartz, feldspar and rock fragments on the Dickinson & Suczek (1979) QFL triangle diagram was interpreted as a recycled orogen type.
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Bormann, H. "Analysis of the suitability of the German soil texture classification for the regional scale application of physical based hydrological model". Advances in Geosciences 11 (16 de mayo de 2007): 7–13. http://dx.doi.org/10.5194/adgeo-11-7-2007.
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Abstract. Regional scale hydrological simulations are mostly based on the use of standard data sets such as soil maps which are based on soil texture classification schemes. This paper analyses the suitability of the German soil texture classification for the application of a physically based soil-vegetation-atmosphere-transfer scheme. Theoretical soil columns are defined to be able to represent the entire soil texture triangle by a 1% grid of the three particle size classes: sand, clay and silt. These theoretical soil columns are characterized by a homogenous soil texture and consist of two layers of increasing bulk density and decreasing content of organic matter with depth. Soil hydraulic parameterisation is derived by applying a pedotransfer function. Continuous water balance calculations are carried out for a ten year period for all grid cells of the 1% grid. The results of the water balance calculations are compared to the simulation results of the centre of gravity of the respective soil texture class. Texture class specific mean deviations and root mean squared deviations are calculated from the differences between the 1% pixels and texture class representatives. The results reveal that the loam and silt texture classes show only small deviations from the centres of gravity. For a few sand texture classes and most of the clay texture classes deviations are considerably large. Assuming an equal distributed probability of occurrence of all realisations within a soil texture class, an uncertainty of more than 100 mm/a with respect to runoff and actual evapotranspiration is detected for four clay texture classes, two sand texture classes and one silt texture class. These results are confirmed by a sensitivity analysis investigating the model response for a grid cell compared to the neighboured grid cells. High sensitivities mainly appear for sandy and clayey soils while the sensitivity of the model for loam and silt soils is smaller. Resuming it can be stated that most of the texture classes of the German texture classification scheme are suitable for the application of a physically based model, on regional scale in particular. Clay texture classes can be expected to cause high simulation uncertainties.
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Jing, Xiaoyuan, Jintong Zhang, Youqing Luo, Shixiang Zong, Peihua Liu y Junxian Jia. "Identification and Field Evaluation of the Female Sex Pheromone of the Sand Salix Carpenterworm, Holcocerus arenicola Staudinger (Lepidoptera: Cossidae)". Zeitschrift für Naturforschung C 65, n.º 5-6 (1 de junio de 2010): 403–11. http://dx.doi.org/10.1515/znc-2010-5-614.
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Extracts of female sex pheromone glands of the sand Salix carpenterworm moth, Holcocerus arenicola, a serious pest of desert thicket, were analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). Based on comparison of retention times and mass spectra of synthetic standards, four compounds were identifi ed as cis-7-tetradecen-1-ol (Z7 - 14:OH), cis-5-tetradecen-1-yl acetate (Z5 - 14:OAc), cis-7-tetradecen- 1-yl acetate (Z7 - 14:OAc), and cis-9-hexadecen-1-yl acetate (Z9 - 16:OAc) with the ratio of 24:39:100:43. Electroantennographic (EAG) analyses of these standard chemicals and their analogues showed that Z7 - 14:OAc elicited the largest male EAG response, followed by Z5 - 14:OAc and Z9 - 16:OAc. In fi eld trials, traps baited with either Z7 - 14:OAc or Z5 - 14:OAc captured males while Z7 - 14:OH-, Z9 - 16:OAc- or solvent-baited traps caught no males. Z7 - 14:OAc as a single component was signifi cantly more attractive than Z5 - 14:OAc alone. The combination of Z7 - 14:OAc and Z5 - 14:OAc showed an evidently synergistic effect and attracted much more males than the individual compounds in the field. Addition of Z7 - 14:OH to the blend of Z7 - 14:OAc and Z5 - 14:OAc enhanced slightly the trap catches. We conclude that the major components of the sex pheromone of H. arenicola are Z7 - 14:OAc and Z5 - 14:OAc. Currently, a triangle trap baited with the synthetic compounds Z7 - 14:OAc, Z5 - 14:OAc, and Z7 - 14:OH in a 1:0.4:0.25 ratio at 825 μg/trap dosage can be effectively used to monitor the H. arenicola population level and catch the males within the desert regions in China.
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Habib, André. "En terrains connus ou « choses vues » dans Paris : Night and Day (2008) de Hong Sang-soo". Études littéraires 45, n.º 2 (4 de marzo de 2015): 97–107. http://dx.doi.org/10.7202/1028980ar.
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Paris est, avec peut-être New York comme seul rival, un des « personnages » les plus illustres de l’histoire du cinéma. Des « vues Lumière » jusqu’aux pérégrinations des héros de la Nouvelle Vague, de la psychogéographie de Debord aux cartographies affectives de Rohmer, en passant par les Paris vu par (1965, 1985) et autres Paris je t’aime (2006), peu de villes ont été autant filmées, et peu de villes ont eu autant d’influence sur l’imaginaire cinématographique. Il est notamment fascinant de constater la migration de cet imaginaire au sein des cinématographies asiatiques contemporaines. Cet article se penche sur le film Night and Day (2008) de Hong Sang-soo, tourné principalement dans le XIVe arrondissement à Paris, seul film de ce cinéaste sud-coréen à avoir été réalisé à l’extérieur de son pays. Le cinéma de Hong Sang-soo tourne autour d’un périmètre très limité et obsessif de lieux (cafés, bars, appartements), de quartiers et de situations (beuveries, triangles amoureux, vacances). Night and Day, avec le XIVe arrondissement comme toile de fond, en offre une énième variation, délocalisée, certes, mais totalement marquée par la présence du familier. Plutôt que d’être une expérience de la ville fondée sur le choc des cultures ou la rencontre avec l’autre, Night and Day propose un regard tout à fait décomplexé sur Paris, attentif aux « choses vues » les plus triviales, et marqué par un attachement aux lieux ordinaires, au commun, au quotidien, aux parcours du héros (qui n’y rencontre, à peu de choses près, que des Coréens). Par ailleurs, comme pour Tsai Ming-liang (Et là-bas, quelle heure est-il ? [2001], Visage [2009]) ou Hou Hsiao-hsien (Le Voyage du ballon rouge, 2007), l’appropriation de Paris est indissociable d’une culture cinéphilique (en l’occurrence, dans le cas de Hong Sang-soo, du cinéma de Rohmer). Il s’agira donc d’essayer de décrire les modes d’appropriation de l’espace de la ville dans ce film, et l’imaginaire culturel par lequel ils transitent.
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Aibaidula, Abuduwali y George McMechan. "Inversion and interpretation of a 3D seismic data set from the Ouachita Mountains, Oklahoma". GEOPHYSICS 74, n.º 2 (marzo de 2009): B37—B45. http://dx.doi.org/10.1190/1.3073005.
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Acoustic impedance inversion (AI) and simultaneous angle-dependent inversion (SADI) of a 3D seismic data set characterize reservoirs of Mississippian Morrowan age in the triangle zone of the frontal Ouachita Mountains, Oklahoma. Acoustic impedance of the near-angle seismic data images the 3D spatial distributions of Wapanucka limestone and Cromwell sandstone. Lamé [Formula: see text] ([Formula: see text] and [Formula: see text]) and [Formula: see text] sections are derived from the P-wave and S-wave impedance ([Formula: see text] and [Formula: see text]) sections produced by the SADI. Lithology is identified from the gamma logs and [Formula: see text]. The [Formula: see text], [Formula: see text], and [Formula: see text] are interpreted in terms of a hydrocarbon distribution pattern. The [Formula: see text] is used to identify high [Formula: see text] regions that are consistent with high sand/shale ratio. The estimated impedances and derived Lamé parameter sections are consistent with the interpretation that parts of the Wapanucka limestone and Cromwell sandstone contain potential gas reservoirs in fault-bounded compartments. The Cromwell sandstone contains the main inferred reservoirs; the two largest of these are each [Formula: see text] in pore volume. The inversion results also explain the observed low production in previous wells because those did not sample the best compartments. We propose a single new well location that would penetrate both reservoirs; 3D visualization facilitates this recommendation.
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Seo, W. W., W. S. Yoon, H. Kang, P. C. Lim y T. Kim. "DEVELOPMENT OF CLOUD DETECTION METHOD FOR CAS500-1 IMAGERY". International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-1/W2-2023 (13 de diciembre de 2023): 1537–43. http://dx.doi.org/10.5194/isprs-archives-xlviii-1-w2-2023-1537-2023.
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Abstract. Clouds are typically characterized by high reflectance and low brightness temperature. They are generally classified as noise in optical land monitoring satellites. In particular, the presence of clouds has a decisive effect on the quality of follow-up data, so they must be detected. In this study, pre-processing was applied to effectively detect clouds while minimizing noise using CAS500-1 images with visible and near-infrared bands. First, the RGB color space is converted to the HSV color space. Next, a triangle thresholding method is applied to the value channel, which exhibits the highest correlation with pixel brightness, to extract bright objects. Then, the maximum likelihood method is applied to differentiate between bright objects and cloud candidate objects. Finally, threshold values for cloud detection are automatically determined to create initial cloud maps using the statistical values derived from the cloud candidate objects. We compared the results generated by the single thresholding method to verify the performance of the proposed method. As a result, the proposed method was able to detect clouds more accurately by considering the reflectance characteristics of each image. Moreover, except for cloud objects, the rest of the bright objects (white roofs, concrete roads, sand, etc.) were minimized. Our experiments showed high stability despite the absence of shortwave infrared and thermal infrared bands, which are effective for cloud detection.
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GELOS, EDGARDO MARTÍN, JORGE OSVALDO SPAGNUOLO y FEDERICO IGNACIO ISLA. "Características Tectónicas de Áreas de Aporte para Arenas de Playas de Tierra del Fuego y Península Antártica, Argentina". Pesquisas em Geociências 27, n.º 1 (30 de junio de 2000): 69. http://dx.doi.org/10.22456/1807-9806.20181.
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Sand mineralogical analysis from 22 beaches were performed within the southernmost area of Argentina (Isla Grande de Tierra del Fuego), the Antarctic Peninsula and the Scotia Arc (South Orkney, South Shetland and James Ross islands included). Composition triangles of light and heavy minerals were considered in order to relate them to depocenters, sediment sources and tectonic setting. 71% of the sediments would have been transported from magmatic arcs, 24% from elevated crystalline basements and only 5% from recycled orogene. In regard to the heavy mineral distribution, 70% were assigned to a suite from an active continental margin and the remaining 30% would correspond to areas outside the continental margins (volcanic arcs). In a general way, sediment sources were related to active margins or volcanic island arcs. As an anomalous fact, it is stressed that the coasts of Tierra del Fuego and the western sector of the Antarctic Peninsula and adjacent islands, contain sediments from a Pacific margin but lying on a passive Atlantic margin. Finally, it should be adviced about the convenience to know the source areas when ice is the transport agent, as it avoids a selective ability and it does not modify the original mineralogical composition.
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Adhitya, Bagus, Yunior Ryandri Putra y Arsyad Ar. "MANIFESTASI PANAS BUMI SERTA REKOMENDASI PEMANFAATANNYA DI DESA KOTO SANI DAN SEKITARNYA, KECAMATAN X KOTO SINGKARAK, KABUPATEN SOLOK, PROVINSI SUMATRA BARAT". JOURNAL ONLINE OF PHYSICS 8, n.º 2 (1 de abril de 2023): 12–22. http://dx.doi.org/10.22437/jop.v8i2.22184.
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The volcanic arc or volcanic arc that extends along the western side of Sumatra Island. Koto Sani Village, Kec. X Koto Singkarak, Solok Regency, West Sumatra Province is one of the areas on Sumatra Island that has geothermal potential. In terms of the developing tectonic order, namely in the form of a geological structure in the form of the Sumani segment of the Sumatra Fault which moves in a strike slip to the right or dextral. This geological structure is one of the main components forming the geothermal system apart from the heat source, reservoir rock, stratigraphic characteristics and the cap layer. This study aims to determine the geological setting, any geothermal manifestations found in the study area and estimate the temperature below the surface for recommendations for its use. The research method used was the interpretation of satellite imagery on the 1:25,000 scale of the Indonesian Rupa Bumi map (RBI), surface geological mapping, measurement of the physical characteristics of geothermal fluids, geochemical analysis of geothermal fluids (anion-cation) and then plotting Giggenbach's triangle diagram (1991). and geothermal geothermal calculations, as well as analysis of 18O and 2H isotopes. The research area generally forms a landscape of elongated hills with quite steep valleys as a result of tectonic activity in the form of geological structures as migration routes of hot fluids from the reservoir to the surface. This is reinforced by the results of the interpretation of river flow patterns, namely meandering or sub-dendritic and elongated or called parallel as an indication of disturbance from faults or faults. Geothermal manifestations found are hot springs, sintered silica and hydrothermal alteration rocks. The estimated temperature below the surface is 407.64°C with a high temperature category and is recommended for direct use, such as the tourism and fisheries sector, as well as indirect use, such as geothermal energy power plants.
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Nusratina, Rina Hazrina, Dwi Haryo Ismunarti y Aris Ismanto. "Studi Karakteristik Arus Laut di Selat Mansuar, Kabupaten Raja Ampat Berdasarkan Pemodelan Hidrodinamika 2D". Indonesian Journal of Oceanography 5, n.º 2 (13 de julio de 2023): 151–64. http://dx.doi.org/10.14710/ijoce.v5i2.19031.
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Kabupaten Raja Ampat terkenal dengan pemandangan alamnya yang indah disertai pasir pantainya yang berwarna putih. Raja Ampat terletak pada kawasan Coral Triangle atau pusat segitiga karang dunia. Kabupaten Raja Ampat terdapat beberapa selat dan teluk salah satunya yaitu Selat Mansuar yang berada diantara Pulau Gam dan Pulau Mansuar. Kondisi morfologi dasar laut yang terjal dan tertutup terumbu karang, topografi perairan yang tidak teratur, posisi perairan yang berada di pintu masuk bagian timur laut ARLINDO, serta adanya pengaruh arus Halmahera Eddie memberikan pengaruh yang pada kecepatan dan arah arus di Selat Mansuar. Kondisi tersebut dipengaruhi pula oleh batimetri perairan yang cukup kompleks sehingga sangat menarik untuk dilakukan pengkajian. Penelitian ini bertujuan untuk mengetahui karakteristik arus laut di Selat Mansuar, Kabupaten Raja Ampat. Pendekatan numerik dilakukan melalui pemodelan hidrodinamika dua dimensi. Hasil pendekatan hidrodinamika akan menghasilkan kecepatan dan arah arus, serta nilai pasang surut. Data yang digunakan pada penelitian ini yaitu data angin ERA-5, batimetri nasional (BATNAS), serta data arus dan pasang surut pengukuran lapangan bersumber dari Pusat Penelitian dan Pengembangan Geologi Kelautan (P3GL). Hasil pemodelan berupa kecepatan dan arah arus untuk kemudian di validasi dengan data pengukuran lapangan. Hasil penelitian menunjukkan bahwa karakteristik arus di Selat Mansuar lebih dominan dipengaruhi oleh arus pasut. Pola arus yang dihasilkan pada puncak siklus angin Musim peralihan I bergerak dominan ke arah Tenggara. Pada kondisi surut menuju pasang arus memiliki kecepatan lebih tinggi dibandingkan dengan kondisi lainnya, dengan nilai kecepatan rata-rata mencapai 0.235 m/s. Berdasarkan hasil analisis komponen pasang surut, Selat mansuar termasuk tipe pasang surut Campuran Condong Harian Ganda.AbstractRaja Ampat Regency is famous for its beautiful natural scenery and white sand beaches. Raja Ampat is located in the Coral Triangle area or the center of the world's coral triangle. Raja Ampat Regency has several straits and bays, one of which is the Mansuar Strait between Gam Island and Mansuar Island. The morphological conditions of the seabed are steep and covered with coral reefs, irregular water topography, the position of the waters at the entrance to the northeast part of ARLINDO, and the influence of the Halmahera Eddie current which affects the speed and direction of the current in the Mansuar Strait. These conditions are also influenced by the bathymetry of the waters which are quite complex so it is very interesting to do an assessment. This study aims to determine the characteristics of ocean currents in the Mansuar Strait, Raja Ampat Regency. The numerical approach is done through two-dimensional hydrodynamic modeling. The results of the hydrodynamic approach will produce current speed and direction, as well as tidal values. The data used in this study are ERA-5 wind data, national bathymetry (BATNAS), and field measurement data of currents and tides sourced from the Marine Geology Research and Development Center (P3GL). Modeling results in the form of current speed and direction and then validated with field measurement data. The results showed that the characteristics of the currents in the Mansuar Strait are dominantly influenced by tidal currents. The resulting current pattern at the peak of the wind cycle Transitional season I move dominantly to the Southeast. At low tide conditions towards the tide, the current has a higher speed compared to other conditions, with an average speed value reaching 0.235 m/s. Based on the results of the tidal component analysis, the Mansuar Strait includes a Mixed Tide Prevailing Semi Diurnal type.
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Saleh, E., G. Jolis, N. F. Osman, J. Sentian, J. Joseph, J. Jomitol y N. Adin. "Beach erosion: Threat and adaptation measures of communities in the Tun Mustapha Park (TMP), Sabah, Malaysia". IOP Conference Series: Earth and Environmental Science 1103, n.º 1 (1 de noviembre de 2022): 012034. http://dx.doi.org/10.1088/1755-1315/1103/1/012034.
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Beach erosion is among the main phenomena affecting small islands in the Coral Triangle region, particularly in the Tun Mustapha Park (TMP), Malaysia. This study was done to investigate the level of beach erosion and to determine the adaptation measures for the coastal communities to beach erosion. Field trips were carried out in May and July 2017 at seven islands (Banggi, Tiga, Balambangan, Malawali, Molleangan, Tigabu and Mandidarah) of TMP. Semi-structured interviews were conducted with 50 respondents who were the coastal inhabitants of the islands, to gain local knowledge about island beach erosion. Results indicate that beach erosion occurred during the peak of monsoon seasons and extreme events. Wind-induced high waves during the end of the year (northeast monsoon) eroded beaches, damaged houses, fishing structures and uprooted trees. Six of the islands are affected by beach erosion, whereas Mandarah island is experiencing accretion. Karakit beach is the only study site protected by seawall and beach revetment. The identified coastal adaptations to beach erosion were traditional shoreline protection by piling dead corals, sand sacks and woods on the beaches, modification and improvement to damaged building structures. Some local communities opted to move further inland and relocate to other islands or mainland Sabah to avoid the impacts of erosion. This study emphasizes the value of local knowledge shared by the coastal communities which can be incorporated with scientific baseline data for improved sustainable coastal development, protection, and management of the marine protected area.
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Yardımlı, Seyhan, Murat Dal y Esma Mıhlayanlar. "Investigation of Earthquake Behaviour of Construction System and Materials in Traditional Turkish Architecture". ITM Web of Conferences 22 (2018): 01034. http://dx.doi.org/10.1051/itmconf/20182201034.
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In this study, it is aimed to present a point of view regarding the behaviour of construction systems implemented in traditional Turkish architecture against earthquakes. In the scope of the study, examples of civil architecture were considered and their structures were evaluated as building elements such as foundation, wall and flooring. Traditional Turkish architecture construction systems can be evaluated in two parts. One of them is the wooden carcass system and the other is the unreinforced masonry system. In the wooden carcass system, the carrier is the load bearing elements used in horizontal and vertical directions. Intermediate parts (strut, diagonal etc.) are placed between these elements to form triangles. The triangles (strut, diagonal) used in the wooden skeleton system comprise highly resistant forms against earthquakes. Moreover, due to the internal structure and physical properties of the wood, which is the skeleton material, the flexibility that it maintains can meet the lateral loads of earthquakes. The second construction system which is the system addressed in this application, is the unreinforced masonry system. In this system, the loadbearing system itself is the walls, which are not resistant to lateral loads. In order to provide this flexibility beams (hatıllar) are installed at certain intervals. After the wall is built to a certain height, a different material is laid allowing a plane of movement on the wall. Thus, when the wall is exposed to a lateral load, it escapes from the planes where the beams (hatıllar) are present, and is protected against large damages by absorbing the earthquake load. In order to establish that the foundation of the structure can withstand earthquakes by movement, wood is placed at the lower part of the foundation above a layer of sand ensuring lateral movement and flexibility of the building. In traditional buildings the slabs are connected to the building walls with beams (hatıllar). Through the agency of the beams (hatıllar) formed at the connection points, the slabs can act as a mass so that they can meet the earthquake load. Allowing the structure to move makes it resistant to earthquakes, seismic isolators are used for this purpose by absorbing the earthquake load and moving the foundation of the structure.
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Wu, Ming, Jianfeng Wu, Jichun Wu y Bill X. Hu. "Effects of microarrangement of solid particles on PCE migration and its remediation in porous media". Hydrology and Earth System Sciences 22, n.º 2 (7 de febrero de 2018): 1001–15. http://dx.doi.org/10.5194/hess-22-1001-2018.
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Abstract. Groundwater can be stored abundantly in granula-composed aquifers with high permeability. The microstructure of granular materials has important effect on the permeability of aquifers and the contaminant migration and remediation in aquifers is also influenced by the characteristics of porous media. In this study, two different microscale arrangements of sand particles are compared to reveal the effects of microstructure on the contaminant migration and remediation. With the help of fractal theory, the mathematical expressions of permeability and entry pressure are conducted to delineate granular materials with regular triangle arrangement (RTA) and square pitch arrangement (SPA) at microscale. Using a sequential Gaussian simulation (SGS) method, a synthetic heterogeneous site contaminated by perchloroethylene (PCE) is then used to investigate the migration and remediation affected by the two different microscale arrangements. PCE is released from an underground storage tank into the aquifer and the surfactant is used to clean up the subsurface contamination. Results suggest that RTA can not only cause more groundwater contamination, but also make remediation become more difficult. The PCE remediation efficiency of 60.01–99.78 % with a mean of 92.52 and 65.53–99.74 % with a mean of 95.83 % is achieved for 200 individual heterogeneous realizations based on the RTA and SPA, respectively, indicating that the cleanup of PCE in aquifer with SPA is significantly easier. This study leads to a new understanding of the microstructures of porous media and demonstrates how microscale arrangements control contaminant migration in aquifers, which is helpful to design successful remediation scheme for underground storage tank spill.
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Artukhova, Olga Anatoljevna, Talgat Basarbaevich Mamirov y Yerlan Yersainovich Klyshev. "Mesolithic monument Novaya Kazanka 1 in the Northern Caspian region (materials of 2005)". Samara Journal of Science 6, n.º 3 (1 de septiembre de 2017): 79–85. http://dx.doi.org/10.17816/snv201763202.
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This paper provides information about exploring of the Stone Age at the site Novaya Kazanka 1 in sand dunes on the western shore of Lake Soraidyn by employees of Institute of Archeology named after A.Kh. Margulan. They worked on the monument in 2003 and 2005. 8 accumulations of stone artifacts were allocated on the monument. The pits laid at the site showed the absence of the buried cultural layer. Stone artifacts were made mainly of two types of raw materials - siliceous rock and quartzite sandstone. The typological description of the stone collection of accumulations at the Novaya Kazanka 1 site indicates their chronological diversity ranging from purely Mesolithic complexes to mixed Meso-Neolithic ones. The technique of primary splitting is represented by unit nuclei and fragments of small dimensions. The tools are represented by scrapers, mostly end-plates on fragments of plates, lamellar flakes, plates and fragments of retouched plates, geometric microliths (segments, trapeziums, and triangles) and others. The stone inventory of the accumulations at the Novaya Kazanka 1 site does not contradict the conclusions about the correlation of the monuments near Lake Soraidyn with the monuments of the Istai group of the Seroglazov culture, which is expressed both in raw materials preferences and in the technique of primary splitting, as well as in the collection of stone implements.
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Hamed, Abass Mohamed Elhag, Motasim Hyder Abdelwahab y El Mamoun Haroun Osman. "Land Suitability and Characterization Study of Soils, Natural Vegetation Cover in Wahat Elnukhila area, Northern Darfur State, Sudan". IRA-International Journal of Applied Sciences (ISSN 2455-4499) 17, n.º 4 (4 de enero de 2023): 61. http://dx.doi.org/10.21013/jas.v17.n4.p4.
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This study was conducted in the Wahat Elnukhila area, about 600 km northeast of El-fashier town, northern Darfur State, to produce broad–base data on the geographical distribution of soils, characterization of soils using some soil indicators (ECe, pH and SAR), explore the natural land cover and evaluate the soil suitability for agricultural activities in the study area. The study area covers (20000 feddans). This research was based on the data and information extracted from the soil survey, remote sensed landsat, Enhanced Thematic Mapper (ETM+) images dated 2018, in addition to field observation aided by GPS receivers and geographic information system were used to generate soil map in the study area. By using the American soil classification system (FAO, 1990 and 2006) study area may be classified into three units, the total area of the three units and natural vegetation cover decreased in the following order: unit1 (12734 feddans) > unit 2 (3994 feddans) > unit 3 (3272 feddans), green covers as a result of the availability of quantities of ground and surface water, which distinguishes it from the rest of the surrounding desert lands. The predominant vegetation cover is Imperata cylindrica (halfa), Tamarix (Tarfa), phragmites (communist)“ Alboes”, Citrullus Colocynthis (Hanzal), Ischaemum muticum and p. dactylifera (date palm). Regarding soil texture, drainage, soil depth, and fertility status for units 1, unit 2, and unit 3, can be described as follows: sandy to loamy sand, well-drained, shallow and low fertile, coarse texture to moderate, moderately drained, shallow to moderate and low fertile, gravelly surface, moderatly drained, shallow to moderate and very low fertile respectively. Soil analysis reveled that there was high inherent risk of soil salinity and sodicity, especially unit 1. In general, the result showed that there were clear aspects of wind erosion represented as large areas affected by the sand encroachment form of crescent dunes and rocks interspersed with hills and plateaus. Furthermore, soils of the targeted area were formed from the accumulation of creeping and portable aeolian sands. The research site lies in the southeastern part of the border triangle between Sudan, Egypt, Libya and Chad, which is severely affected by wind erosion because the site was bare, open with no wind barriers or shelter belts, also this area falls under the sand moving winds of the Sahara. These are the northerly winds that prevail in Northern Darfur State. Furthermore, the prevalent climatic conditions including high temperature, rainless area and relatively high wind speed are conducive to high wind erosion. The area in danger unless serious measures carried out to reduce wind erosion. The area has very low potential suitability for agriculture. The study area was rich in wild life such as deer, rabbits, birds, many insects and snakes.
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Zamroni, Akhmad. "Geochemical Approach for Seawater Intrusion Assessment in the Area around Yogyakarta International Airport, Indonesia". Iraqi Geological Journal 54, n.º 1F (30 de junio de 2021): 1–11. http://dx.doi.org/10.46717/igj.54.1f.1ms-2021-06-21.
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A total of 10 groundwater samples were obtained from groundwater wells with depths of around 8-10 meters distributed around Yogyakarta International Airport, Indonesia to test the geochemical of groundwater for assessing the seawater intrusion. Samples were taken into polyethylene bottles with a volume of 1000 ml. These bottles were rinsed to reduce the risk of any contamination prior to their filing with sampled water. Piper Diagram is used to evaluate seawater intrusion by plotting the percentages of cations and anions (in mEq/L) as a single point on the triangle. The groundwater facies' in the study area are CaHCO3 and CaNaHCO3. It suggests that the origins of the elements Ca and Na were estimated to derive from the dissolution of the plagioclase, hornblende, and pyroxene minerals found in the sand sediment, while the elements of HCO3 were estimated from the dissolution of carbonate minerals or the decomposition of organic matter and root respiration in the soil zone may enrich their concentration. The wells affected by slightly freshening were ZAM-04, ZAM-05, ZAM-06, ZAM-08, and ZAM-10. While the wells that are not affected by the intrusion or fresh were ZAM-01, ZAM-03, ZAM-07, and ZAM-09. However, ZAM-02 well which is close to the coastline and the closest to the airport development area was the only well that affected significantly by freshening, comparing with other wells. Another expected controlling factor was the fault in the northern part which continuously leads that location. By supported a flow pattern or large river, it was concluded the alluvial deposits buried the fault, and it was estimated to continue to that location.
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Šupić, Slobodan, Mirjana Malešev, Vladan Pantić, Ivan Lukić, Vlastimir Radonjanin, Miloš Ognjanović y Gordana Broćeta. "Environmentally Friendly Masonry Mortar Blended with Fly Ash, Corn Cob Ash or Ceramic Waste Powder". Materials 16, n.º 20 (17 de octubre de 2023): 6725. http://dx.doi.org/10.3390/ma16206725.
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Implementing a circular approach through waste valorization in mortar production with environmentally efficient mix design is a viable pathway for relieving the ecological burden of greenhouse gas emissions, resource depletion and waste management. The main objective of this paper is to evaluate the feasibility of using fly ash (FA), corn cob ash (CCA), and ceramic waste powder (CWP) as supplementary cementitious materials (SCM) in cement–lime masonry mortars. As part of an extensive experimental study, twelve mortar mixtures were made: three reference and nine blended, with mixing ratios of 1:1:5, 1:0.7:4.2, and 1:1:4 ((cement + SCM)/lime/sand), by volume. The examined properties include workability, compressive and flexural strengths, dry bulk density, capillary water absorption, adhesive bond strength, and water vapor permeability. The compressive and flexural strengths of tested mortars were notably impaired, with reductions of up to 60%, while the capillary water absorption coefficient rose by 100% compared to the reference values. The adhesive bond strength of some blended mortars exceeded the strength of the reference mortars. Nevertheless, all blended mortars fulfilled the requirements for general-purpose mortars, while the majority met the criteria for structural masonry applications. In addition, a performance-based index and weighting triangle were used for the comparison and ranking of all analyzed mortar mixtures. The findings of this study may herald a novel use of FA, CCA, and CWP as more eco-friendly binding materials in contemporary construction leading to the reduction in the process’s carbon footprint, the improvement in cost efficiency, and the mitigation of the detrimental environmental impact of waste disposal.
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Yahodynska, M. O., V. V. Ilchyshyn y M. P. Sokhatsky. "NEW RESEARCH ON BURIALS OF THE GLOBULAR AMPHORAE CULTURE IN TERNOPIL REGION". Archaeology and Early History of Ukraine 46, n.º 1 (28 de marzo de 2023): 101–15. http://dx.doi.org/10.37445/adiu.2023.01.05.
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The article introduces the results of archaeological research in the tombs of the Globular Amphorae culture near the Bilyi Potik and Ozeriany villages of Chortkiv district, Ternopil region (Western Podillia). The description of the archaeological material found during the excavations has been provided.
Both tombs from Bilyi Potik and Ozeriany differ in number and composition of the buried individuals. All those buried in Bilyi Potik were men. There were two men, two women and a child in Ozeriany. The question of their family relations remains open before additional research. The set of accompanying items is also different: in Bilyi Potik — 10 pots and a lid, two flint axes, a chisel, three knife-like plates, four parts of bone buckles, a bone pricker, two fangs and a small pig bone; in Ozeriany — 11 pots, a lid, one flint ax and two fragments from axes, four amber beads, a half of a bone buckle, three pig tusks and one large bone (part of a leg?) of a cattle (?).
The pottery also differs in the affinity of the ornaments. The vessels in Bilyi Potik varied by its clay mass (ceramics with chamotte and plant remains predominated, ceramics with predominance of sand admixture was in a smaller amount). The pottery ornamentation was not only with triangles filled with scaly ornamentation, but also with pseudo-cord ornamentation. The bottom of the pots is flat in 8 cases, convex in 2 cases. Pots had two symmetrical handles. In two cases, the engobe is fixed.
Handmade vessels from the tomb in Ozeriany are mostly made of clay with the addition of a large amount of sand with crushed flint or crushed shell. All pots have a flat bottom, in three cases the pots have two symmetrical handles, one has 4 handles, and one has 4 pseudo handles. Three pots from a ceramic set have no ornamentation. The surface decoration of other pots is more diverse. In addition to the traditional subtriangular ornament with a scaly filling, the pots are decorated with zig-zags, double horizontal and vertical lines, stamped with round teeth, and bands of short vertical and horizontal lines.