Bibliografie tematiche / Total penetration

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Letteratura scientifica selezionata sul tema "Total penetration"

Autore: Grafiati

Pubblicato: 3 giugno 2025

Ultima modifica: 31 luglio 2025

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Articoli di riviste sul tema "Total penetration"

Harikrishnan, S., V. Venkateswara Rao, and Ajay Misra. "A Numerical Study of Penetration in Concrete Targets by Eroding Projectiles of Different Materials." Defence Science Journal 71, no. 5 (2021): 612–18. http://dx.doi.org/10.14429/dsj.71.16942.

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Numerical simulations have been performed to examine the effect of three different eroding rod materials on the penetration in concrete targets. Same kinetic energy is delivered to concrete target using cylindrical rods of Aluminium, Iron, and Copper of identical size. Impact velocities have been varied to keep the kinetic energy the same. Penetration characteristics like centerline interface velocity, penetrator deceleration, plastic strain in the target, and energy partitioning during penetration have been studied for the three different penetrator materials. In all three cases, penetration

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Gómez-Benlloch, Alba, Jeroni Nadal, Gemma Julio, and Javier Elizalde. "Globe penetration during loco-regional anesthesia: prevalence and review of cases." International Journal of Ophthalmology 15, no. 10 (2022): 1683–90. http://dx.doi.org/10.18240/ijo.2022.10.18.

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AIM: To describe prevalence and different clinical signs and management of cases with penetrating eye injuries during loco-regional anesthesia for ophthalmic surgery. METHODS: A retrospective review of clinical records was carried out, identifying cases of globe penetration secondary to peribulbar anesthesia injection during 5y activity in Centro de Oftalmología Barraquer. RESULTS: A total of 17 460 needle-based ocular anesthesia procedures were performed in our centre and 4 cases of globe penetration were recorded with an estimated prevalence of 0.024%. Globe penetrations were always detected

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Zou, Minming, Min Guo, and Xianghai Ye. "Penetrating Power of High-Density Tungsten Fiber/Zr-Based Metallic Glass Matrix Composite." Advances in Materials Science and Engineering 2022 (March 4, 2022): 1–8. http://dx.doi.org/10.1155/2022/8087525.

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Tungsten-fiber/Zr-based metallic glass (Zr41.25Ti13.75Cu12.5Ni10Be22.5) matrix composite (hereinafter referred to as WF/Zr-MG composite) is considered a potential new generation of projectile material, while the density of WF/Zr-MG composite is usually around 16.5 g/cm3 and it is difficult to exceed 17.0 g/cm3. To understand the penetration performance of the composite material, a penetration test was performed on high-density WF/Zr-MG composite with a density of 17.1 g/cm3. The penetration depth, the diameter of the crater, morphology, and microstructure have been studied in a residual high-d

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Wetzels, Thomas, Joost van Erp, Reinoud W. Brouwer, Sjoerd K. Bulstra, and Jos J. A. M. van Raay. "Comparing Cementing Techniques in Total Knee Arthroplasty: An In Vitro Study." Journal of Knee Surgery 32, no. 09 (2018): 886–90. http://dx.doi.org/10.1055/s-0038-1669917.

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AbstractAseptic loosening remains to be a major reason for revision in total knee arthroplasty. Cement penetration of 2 to 5 mm increases the interface strength and consequently decreases the likelihood of loosening. But despite this overall accepted optimal cement penetration, there is still a wide variety of cementing techniques used in total knee arthroplasty. The purpose of this study was to evaluate two cementing techniques on the tibial and femoral sides, with regard to cement penetration. Five paired cadaveric knees were used. A total knee arthroplasty was placed according to standard p

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García-Rey, Eduardo, Ana Cruz-Pardos, and Laura Saldaña. "New polyethylenes in total hip arthroplasty." Bone & Joint Journal 104-B, no. 9 (2022): 1032–38. http://dx.doi.org/10.1302/0301-620x.104b9.bjj-2022-0434.r1.

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Aims A significant reduction in wear at five and ten years was previously reported when comparing Durasul highly cross-linked polyethylene with nitrogen-sterilized Sulene polyethylene in total hip arthroplasty (THA). We investigated whether the improvement observed at the earlier follow-up continued, resulting in decreased osteolysis and revision surgery rates over the second decade. Methods Between January 1999 and December 2001, 90 patients underwent surgery using the same acetabular and femoral components with a 28 mm metallic femoral head and either a Durasul or Sulene liner. A total of 66

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Isaac, G. H., D. Dowson, and B. M. Wroblewski. "An Investigation into the Origins of Time-Dependent Variation in Penetration Rates with Charnley Acetabular Cups—Wear, Creep or Degradation?" Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 210, no. 3 (1996): 209–16. http://dx.doi.org/10.1243/pime_proc_1996_210_414_02.

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The total penetration of femoral heads into acetabular cups is achieved by a combination of long-term wear and early non-recoverable deformation or creep. The former is important in determining the total rate of production of polyethylene wear debris, recently implicated in the development of osteolysis and loosening, while the latter contributes to the overall penetration and the possibility of neck impingement in some designs of implants. Attention is drawn to the need to evaluate and to separate out these two physical processes in the assessment of clinical penetration rates. This is partic

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Nie, Xiaodong, Xiangyun Wu, Zhi Yi, Zhilin Long, Hui Zhou, and Nan Ji. "Discussion on Static Resistance of Granite under Penetration." Materials 16, no. 9 (2023): 3353. http://dx.doi.org/10.3390/ma16093353.

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A total of 9 tests were carried out with 30 mm and 78 mm caliber scaled projectiles penetrating into granite targets. The penetration depth, crater diameter, and mass loss rate were examined and discussed. The results indicate that the dimensionless penetration depth of large-caliber projectiles is 20% greater than small-caliber projectiles. Based on the description of static resistance Ra in the Forrestal semi-empirical formula, the size effect of dimensionless penetration depth can be attributed to the size effect of static resistance Ra, and it can be seen that the penetration static resist

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Meulemans, A., P. Vicart, D. Henzel, J. Mohler, and M. Vulpillat. "Cefsulodin Penetration into Rat Brain: Extracellular versus Total Concentration." Chemotherapy 32, no. 5 (1986): 393–98. http://dx.doi.org/10.1159/000238441.

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Vilagosh, Zoltan, Alireza Lajevardipour, Dominique Appadoo, Soon Hock Ng, Saulius Juodkazis, and Andrew W. Wood. "Characterisation of Biological Materials at THz Frequencies by Attenuated Total Reflection: Lard." Applied Sciences 10, no. 23 (2020): 8692. http://dx.doi.org/10.3390/app10238692.

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The penetration depth of an evanescent wave in Attenuated Total Reflection (ATR) is dependent on the wavelength of the radiation utilised. At THz frequencies, the penetration depth into biological tissues is in the order of 0.1 to 0.5 mm; rendered pig lard was used as a model sample in this study. A method for the direct measurement of the evanescent wave penetration depth is presented which allows for the estimation of the dispersion of the complex refractive index by using the reflection of the evanescent wave from varying sample depths. The method employs frustrated total internal reflectio

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Nagler, Jacob. "On Analytical Ballistic Penetration Fundamental Model and Design." WSEAS TRANSACTIONS ON HEAT AND MASS TRANSFER 16 (October 20, 2021): 177–91. http://dx.doi.org/10.37394/232012.2021.16.21.

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This paper presents a new fresh theoretical study of the ballistic penetration phenomena into hard materials due to low-energy bodies' motion. This model based on the energy balance between the kinetic energy of the piercing body and the protective body thermal energy. Following this equilibrium alongside the equation of the projectile motion, the resulting deceleration value is analytically calculated. Substituting the obtained deceleration value into the kinematic equilibrium results with the penetration thickness expression as well as the time of penetration inside the mono and multi layers

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Più fonti

Tesi sul tema "Total penetration"

Wang, Huan, and Huan Wang. "Flow Field Penetration in Thin Nanoporous Polymer Films under Laminar Flow by Förster Resonance Energy Transfer Coupled with Total Internal Reflectance Fluorescence Microscopy." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/565916.

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Tethered polymer layers at solid-fluid interfaces are used widely in a variety of surface science applications. Although many of these applications require exposure to dynamic flow conditions, flow field penetration into densely grafted polymer brushes, is still a question open to debate despite the fact that it is a fundamental process crucial to mass transport through these polymer films. Although most theoretical work has indicated flow field penetration into polymer films, with varying predicted penetration depths predicted, the limited experimental attempts to investigate this phenomenon

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Sümer, Mehmet Resat. "Auswirkungen verschiedener Bodennutzungssysteme auf ausgewählte physiko-chemische Bodeneigenschaften und pflanzenbauliche Parameter in Berlin-Dahlem und Dedelow." Doctoral thesis, Humboldt-Universität zu Berlin, Landwirtschaftlich-Gärtnerische Fakultät, 2013. http://dx.doi.org/10.18452/16672.

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Das Ziel dieser Arbeit war es, die Auswirkungen verschiedener Bodennutzungssysteme auf ausgewählte physiko-chemische Bodeneigenschaften und pflanzenbauliche Parameter auf sandigen Böden auf den Dauerfeldversuchsflächen in Berlin-Dahlem und Dedelow zu untersuchen. Ein erster Arbeitsschwerpunkt am Standort Berlin-Dahlem bestand darin, die Wirkungen verschiedener Bodenbearbeitungstiefen (17 cm und 28 cm) in Abhängigkeit der drei Faktorstufen - mit und ohne Kalkdüngung, mit und ohne Stallmistdüngung, flache und tiefe Bodenbearbeitung - zu ermitteln. Im zweiten Arbeitsschwerpunkt wurden in einer

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Watson, Francis Maurice. "Better imaging for landmine detection : an exploration of 3D full-wave inversion for ground-penetrating radar." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/better-imaging-for-landmine-detection-an-exploration-of-3d-fullwave-inversion-for-groundpenetrating-radar(720bab5f-03a7-4531-9a56-7121609b3ef0).html.

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Humanitarian clearance of minefields is most often carried out by hand, conventionally using a a metal detector and a probe. Detection is a very slow process, as every piece of detected metal must treated as if it were a landmine and carefully probed and excavated, while many of them are not. The process can be safely sped up by use of Ground-Penetrating Radar (GPR) to image the subsurface, to verify metal detection results and safely ignore any objects which could not possibly be a landmine. In this thesis, we explore the possibility of using Full Wave Inversion (FWI) to improve GPR imaging f

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Alvarez, Ferré Luis. "Étude comparative de l'anatomie des plaies de greffe de cornée par tomographie de cohérence optique (OCT)." Thèse, 2009. http://hdl.handle.net/1866/4247.

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Cette thèse porte sur l’étude de l’anatomie de la cornée après 3 techniques de greffe soient, la greffe totale traditionnelle (GTT) et des techniques de greffe lamellaire postérieur (GLP) telles que la greffe lamellaire endothéliale profonde (DLEK) et la greffe endothélium/membrane de Descemet (EDMG) pour le traitement des maladies de l’endothélium, telles que la dystrophie de Fuchs et de la kératopathie de l’aphaque et du pseudophaque. Dans ce contexte, cette thèse contribue également à démontrer l’utilité de la tomographie de cohérence optique (OCT) pour l’étude de l’anatomie des plaies chir

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Libri sul tema "Total penetration"

J, Ostroff Aaron, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., eds. Total energy-rate feedback for automatic glide-slope tracking during wind-shear penetration. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Total energy-rate feedback for automatic glide-slope tracking during wind-shear penetration. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Toal, Gerard. Near Abroad. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190253301.001.0001.

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Before Russia invaded Ukraine, it invaded Georgia. Both states are part of Russia's "near abroad" - newly independent states that were once part of the Soviet Union and are now Russia's neighbors. While the Russia-Georgia war of 2008 faded from the headlines in the wake of the global recession, the geopolitical contest that created it did not. Six years later, the spectre of a revanchist Russia returned when Putin's forces invaded and annexed the Crimean peninsula, once part of Russia but an internationally recognized part of Ukraine since the Soviet collapse. Crimea's annexation and follow on

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Capitoli di libri sul tema "Total penetration"

Collico, S., M. Arroyo, M. DeVincenzi, A. Rodriguez, and A. Deu. "Clustering analysis to improve total unit weight prediction from CPTu." In Cone Penetration Testing 2022. CRC Press, 2022. http://dx.doi.org/10.1201/9781003329091-45.

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Unger, Paul W. "Soil Total Carbon Content, Aggregation, Bulk Density, and Penetration Resistance of Croplands and Nearby Grasslands." In SSSA Special Publications. American Society of Agronomy and Soil Science Society of America, 2015. http://dx.doi.org/10.2136/sssaspecpub57.2ed.c8.

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Snieder, Marchel, and Wei G. Hansen. "Crystal Effect on Penetration Depth in Attenuated Total Reflectance Fourier-transform Infrared Study of Human Skin." In Progress in Fourier Transform Spectroscopy. Springer Vienna, 1997. http://dx.doi.org/10.1007/978-3-7091-6840-0_175.

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Hara, Naoko, Kathrin Benedikt, and Hirofumi Owaki. "CASIA2: Anterior Segment 3D Swept-Source OCT." In Intraocular Lens Calculations. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-50666-6_28.

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AbstractCASIA2 in a swept-source optical coherence tomography (OCT) anterior segment tomographer. It achieves deep penetration and provides wide-field images by means of a high scanning speed (50,000 scans/s) with a light source 1310 nm wavelength, and it can acquire high-quality 3D images from the anterior surface of cornea to the back surface of the crystalline lens. The clinical application includes pre-operative screening to measure corneal total astigmatism, higher-order aberrations, topography maps as well as 3D analysis of the crystalline lens geometry giving values for front and back s

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Verheyden, Maarten, Dries Van Doninck, Frank Verheyden, and Klaus-Dieter Kühn. "Influence of Cement Storage Temperature on Its Viscosity and Penetration Depth in the Tibia During Total Knee Arthroplasty." In Essentials of Cemented Knee Arthroplasty. Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-63113-3_45.

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Gong, Hongxiang, Qian Yin, Wanchun Chen, Jiangwei Wang, Yukun Liu, and Yunliang Cui. "Research on the Influence Mechanism of Side Pile Foundation of Shield Tunnel Based on Transparent Soil Test Technology." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. https://doi.org/10.1007/978-981-97-6238-5_31.

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AbstractCombined with the practical geotechnical problem of shield tunnel side piercing pile foundation, this paper develops a set of test device that can realistically simulate formation loss and post-wall grouting during shield tunneling by introducing transparent soil test technology and digital image processing technology, carries out indoor model tests on the existing pile foundation of double-line tunnel side penetration, obtains the deformation gauge and dynamic development process of soil and pile foundation caused by double-line tunnel, and analyzes the influence of tunnel burial dept

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Rodrigues, Neshwin, Raghav Pachouri, Shubham Thakare, G. Renjith, and Thomas Spencer. "Integrating Wind and Solar in the Indian Power System." In Energiepolitik und Klimaschutz. Energy Policy and Climate Protection. Springer Fachmedien Wiesbaden, 2022. http://dx.doi.org/10.1007/978-3-658-38215-5_7.

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AbstractIndia’s coal contribution to the total electricity generation mix stood at 73% in 2018. To meet India’s NDC ambitions, the federal government announced determined targets to integrate 450 GW Renewable Energy in the grid by 2030. This paper explores the pathways to integrate high RE generation by 2030 with effective balancing of supply and demand and associated challenges of flexibility requirements. A Unit commitment and economic dispatch model, which simulates the power system operation was used. The overall share of variable renewables reaches 26% and 32% in the Baseline Capacity Sce

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Li, Sen, Wei Guo, and Hongyu Wang. "Monitoring of a Suction Pile Jacket for Offshore Wind Turbine During Installation." In Advances in Transdisciplinary Engineering. IOS Press, 2023. http://dx.doi.org/10.3233/atde231081.

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Full-scale field installation test of an offshore wind power suction pile jacket foundation with pile penetration depth to diameter ratio about 2.0 was carried out, where the structure stress of the suction pile side wall, connection joint stress, pore water pressure and earth pressure distribution were monitored. Measured shaft stress results are affected by the applied pressure difference, and reverse tension and compression stress were identified at the same depth, indicating that the suction pile shaft was under bending. After self-weight penetration the foundation inclination was 5.0°, as

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Akhter, Syed. "Infrastructural Drivers of Online Shopping." In Research Anthology on E-Commerce Adoption, Models, and Applications for Modern Business. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-8957-1.ch006.

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While online shopping expenditures have been increasing in both developed and developing economies, they still account for a small share of total retail sales. Significant differences also exist across countries in the amount of money consumers spend on a per capita basis on online purchases. The authors utilize the conceptual foundations of infrastructural framework to examine the effects of infrastructural drivers on online shopping expenditures in 43 countries. Findings show that per capita telecommunications investments and per capita gross national income are significantly associated with

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Atti di convegni sul tema "Total penetration"

Yu, Zihao, Jianjun Zhang, Qian Zhang, and Jianguo Cai. "Penetration performance evaluation of origami honeycomb sandwich structures." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.1352.

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<p>This study numerically simulated the penetration performance of origami honeycomb sandwich structures. The numerical model was validated by comparing the residual velocity and initial impact velocity curves of a monolithic aluminum plate. The vertical penetration ballistic limit and energy absorption capacity of the origami honeycomb sandwich structure were analyzed. The results show that the ballistic limit speed in vertical penetration is about 95 m/s, and the energy absorbed by the core accounts for 35.76% of the total. It shows that the origami honeycomb core layer has good energy

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John, R. C. "Engineering Assessments of Oxidation of Commercial Alloys." In CORROSION 1996. NACE International, 1996. https://doi.org/10.5006/c1996-96171.

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Abstract Oxidation of commercial, heat resistant alloys which are widely used in high temperature equipment has been studied for temperatures of 1,400-2,000°F (760-1,093°C), times up to one year, and O2 concentrations of 1-100% volume in O2-N2 mixtures at one atmosphere total pressure. The traditional method of reporting oxidation by weight change/area was found to measure only 10-20% of the total metal penetration by oxidation for many alloys. Most of the alloys formed a surface layer rich in Cr2O3 and experienced the majority of metal penetration by internal oxidation or void formation. Surf

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Tang, Fujian, Yizheng Chen, Yan Tang, and Genda Chen. "Monitoring Pitting Corrosion Penetration in Steel Rebar Using Optical Fiber." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09513.

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Abstract In this study, an optical fiber corrosion sensor is developed to monitor the penetration of corrosion pits in steel bars. The sensor was simply made by encasing one end of an optical fiber into a steel straw. As the corrosion penetrates through the steel straw wall, the corrosive solution and corrosion products fill inside and contaminate the fiber end surface, resulting in a change in the reflectivity. The change of the optical fiber reflectivity indicates the corrosion pits depth equaling to the wall thickness of the steel straw. Steel straw was fabricated from rebar steel with an i

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John, R. C., I. G. Wright, and A. L. Young. "Long-Term Oxidation of Commercial Alloys in PO2’S of 0.001 - 1 Atma, at Temperatures of 473-1450 K and after 24,000Hr." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04529.

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Abstract Oxidation behavior of a large variety of alloys has been studied for a wide range of conditions. The study examined commercial, heat resistant alloys, which are widely used in high-temperature, process equipment. The exposure conditions included temperatures of 473 – 1450 K, times of 500 – 24,000 hr, and O2 concentrations of 0.1-100% volume in O2-N2 mixtures at one atmosphere total pressure. The traditional method of reporting oxidation by weight change/area was found to measure only 10-20% of the metal penetration by oxidation for many of the alloys. Most of the alloys resisted oxida

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Busba, Ezeddin, and Alberto A. Sagüés. "Critical Localized Corrosion Penetration of Steel Reinforcement for Concrete Cover Cracking." In CORROSION 2013. NACE International, 2013. https://doi.org/10.5006/c2013-02747.

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Abstract Corrosion of steel in concrete causes cracking of the concrete cover (C), when the metal loss reaches a critical penetration depth Xcrit. The value of Xcrit is important to formulate reliable models of the corrosion propagation stage. Corrosion of steel in concrete is commonly localized in nature especially in high quality concrete structures. Localized corrosion can occur due to preexisting cracks in cover concrete, concrete joints or defects in steel coatings. It has been shown previously that the value of Xcrit increases as corrosion becomes more localized, but scarce data did not

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Kalmanovitch, David P., Douglas R. Hajicek, and Michael D. Mann. "Corrosion and Erosion in a Fluidized Bed Combustor: Effect of Bed Chemistry." In CORROSION 1989. NACE International, 1989. https://doi.org/10.5006/c1989-89547.

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Abstract This paper presents the results of a study of the testing of the effects of bed chemistry on corrosion and/or erosion during atmospheric fluidized bed combustion of seven coals. Tests were performed in a 0.041m2 atmospheric fluidized-bed combustor to investigate the corrosive and/or erosive properties of two Texas lignites, a Montana subbituminous, a New Mexico subbituminous, a North Dakota Lignite, an Illinois #6 bituminous, and a Kentucky bituminous coal. Heat transfer tubes were located in the bed, splash and convective sections of the combustor. Surface temperatures of the SA 192

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Bandeira, Merlin C. E., Rogaciano M. Moreira, Felipe S. Assunção, et al. "Localized and Generalized Corrosion Evaluation of S13CR in Shale Oil & Gas Production Conditions." In CONFERENCE 2024. AMPP, 2024. https://doi.org/10.5006/c2024-21106.

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Abstract To understand the performance of S13CR on shale gas field, the ability of oxide layer to repassivate on erosion environment was investigated by means of electrochemical and rotating cage tests at 300 bar of total pressure with 10 bar of CO2, 1.2 mbar of H2S partial pressure with balance of nitrogen; sand particles concentration of 50g/L, 26% NaCl, stir velocity of 1,000 RPM and temperature of 115°C. Based on the results, it was observed stable potential (LPR) under erosion condition (with sand) when compared to reference test (without sand). Despite the huge amount of sand and the hig

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Tassen, C. S., and W. G. Lipscomb. "Microstructure and Mechanical Properties of an Alloy 800 Steam-Methane Reformer Tube after 19 Years of Service." In CORROSION 1986. NACE International, 1986. https://doi.org/10.5006/c1986-86379.

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Abstract A section from an alloy 800 reformer tube, which served satisfactorily in a steam-methane reformer for more than 19 years, was removed for examination after the permanent shut-down of the operation. The operating conditions for this section of tube had been about 140 psig at 1450°F (788°C). The maximum penetration of intergranular oxidation from the outside surface was 0.006 in. (0.15 mm) while the total depth of attack due to oxidation and carburization from the inside surface was 0.025 in. (0.64 mm). The most abundant secondary phase present was σ. The σ phase had not affected the 1

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Kvarekvål, Jon, and Gaute Svenningsen. "Effect of Iron Sulfide Deposits on Sour Corrosion of Carbon Steel." In CORROSION 2016. NACE International, 2016. https://doi.org/10.5006/c2016-07313.

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Abstract The corrosive effects of iron monosulfide particles deposited on carbon steel surfaces were investigated in a series of autoclave experiments. The H2S and CO2 partial pressures were varied in the range of 1-20 bar. Experiments were run at temperatures in the range of 10-120 °C. The test solutions consisted of high-salinity brine (100 g/L NaCl, 0.0025 m bicarbonate) and low-salinity condensed water (0.1 g/L NaCl). The duration of the tests was typically 14 days. Both weight loss corrosion and localized corrosion data were obtained. The entire surfaces of the exposed coupons were scanne

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John, R. C., A. L. Young, and W. T. Thompson. "A Computer Program for Engineering Assessment of Alloy Corrosion in Complex, High Temperature Gases." In CORROSION 1997. NACE International, 1997. https://doi.org/10.5006/c1997-97142.

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Abstract A user-friendly Windows program has been developed with the capability to assess corrosion of commercial alloys in complex gases at high temperatures. Thermochemical predictions of the stable alloy corrosion products are used to infer the likely corrosion mechanism. Regression analysis is used to produce correlations of alloy corrosion with exposure conditions. A large data collection has been compiled and represents nearly 4.7 million hours of exposure time for 71 alloys. The data represent total metal penetration (sound metal loss by surface scale plus internal corrosion) and have b

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Rapporti di organizzazioni sul tema "Total penetration"

Pierola, Martha Denisse, Dennis Sánchez-Navarro, and Mauricio Mesquita Moreira. Exchange Rate Devaluation and Import Substitution in Latin America and the Caribbean. Inter-American Development Bank, 2017. http://dx.doi.org/10.18235/0009362.

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This paper assesses the LAC's import substitution response to the recent wave of currency devaluations. For this purpose, this document uses both descriptive data and a simple econometric model to establish the short-term relationship between exchange rate movements and import penetration (total and within manufacturing sector) in the region, with a special focus on those countries that had experienced the largest depreciations. The results suggest that there is a significant relationship between depreciation and the decrease in import penetration, indicating that a 1% increase in the local cu

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Deaton and Frost. L51571 Pipe-Soil Interaction Tests on Sand and Soft Clay. Pipeline Research Council International, Inc. (PRCI), 1987. http://dx.doi.org/10.55274/r0010291.

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This project was performed to establish a basis for developing pipe-soil interaction models suitable for PRCI's pipeline design program: "PIPEDYN". Full-scale pipe-soil tests on loose and dense sand and soft clay were performed at the Norwegian Hydrotechnical Laboratory, affiliated with SINTEF. The program tested soil resistance to lateral motions of full-scale (0.5 m and 1.0 m OD) pipe sections on loose and dense sand and soft clay. A test rig was used with a soil flume 12.5 m long, 1.8 m wide, and 0.6 m high, and containing 13.5 m3 of sand or soft clay. Three control signals were applied to

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Abdulrahman, Salamatu, Mohammed Alhaji, Muhammad Balarabe, Oluwadarasimi Emehinola, Zeenat Kabir, and Doluwamu Solana. What impact does social media have on Nigeria’s digital creative economy? Busara, 2025. https://doi.org/10.62372/benc5382.

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At the start of 2023, there were 122.5 million internet users in Nigeria with internet penetration at 55.4%. More than 31.6 million Nigerians use social media, equivalent to 14.3% of the total population. Social media, as part of the digital creative economy, has provided employment opportunities to a lot of Nigerians and served as a platform to showcase to the world the cultural richness of Nigeria. Meta created a feel good, celebratory campaign that conveyed the catalytic power of social media to empower Nigerians. The campaign was intended to make Nigerians feel proud about their culture, t

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He, Rui, Na (Luna) Lu, and Jan Olek. Development of In-Situ Sensing Method for the Monitoring of Water-Cement (w/c) Values and the Effectiveness of Curing Concrete. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317377.

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As the most widely used construction material, concrete is very durable and can provide long service life without extensive maintenance. The strength and durability of concrete are primarily influenced by the initial water-cement ratio value (w/c), and the curing condition during the hardening process also influences its performance. The w/c value is defined as the total mass of free water that can be consumed by hydration divided by the total mass of cement and any additional pozzolanic material such as fly ash, slag, silica fume. Once placed, field concrete pavements are routinely cured with

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Petit, Vincent. Road to a rapid transition to sustainable energy security in Europe. Schneider Electric Sustainability Research Institute, 2022. http://dx.doi.org/10.58284/se.sri.bcap9655.

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Decarbonization and energy security in Europe are two faces of the same coin. They are both related to the large dependency of the European Union economy on fossil fuels, which today represent around 70% of the total supply of energy. The bulk of these energy resources are imported, with Russia being the largest supplier, accounting for 40% of natural gas and 27% of oil imports. However, fossil fuels are also the primary root cause of greenhouse gas emissions, and the European Union is committed to reduce those by 55% by 2030 (versus 1990). This report is based on the landmark research from th

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Arcone, Steven, James Lever, Laura Ray, Benjamin Walker, Gordon Hamilton, and Lynn Kaluzienski. Ground-penetrating radar profiles of the McMurdo shear zone, Antarctica, acquired with an unmanned rover : interpretation of crevasses, fractures, and folds within firn and marine ice. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42620.

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The crevassed firn of the McMurdo shear zone (SZ) within the Ross Ice Shelf may also contain crevasses deep within its meteoric and marine ice, but the surface crevassing prevents ordinary vehicle access to investigate its structure geophysically. We used a lightweight robotic vehicle to tow 200- and 40 MHz ground-penetrating radar antennas simultaneously along 10 parallel transects over a 28 km² grid spanning the SZ width. Transects were generally orthogonal to the ice flow. Total firn and meteoric ice thickness was approximately 160 m. Firn crevasses profiled at 400 MHz were up to 16 m wide,

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Starkey, Eric, Daniel McCay, Chrisopher Cooper, and Mark Hynds. Assessment of estuarine water and sediment quality at Cape Hatteras National Seashore and Cape Lookout National Seashore: 2021 data summary. National Park Service, 2022. http://dx.doi.org/10.36967/2294854.

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In July 2021 the Southeast Coast Network conducted an assessment of water quality in the vicinity of Cape Hatteras and Cape Lookout National Seashores as part of the National Park Service Vital Signs Monitoring Program. Monitoring was conducted following methods developed by the Environmental Protection Agency (EPA) as part of the National Coastal Assessment Program (EPA 2010). Laboratory analysis measured chlorophyll a and total and dissolved concentrations of nitrogen and phosphorous. Field measurements included water temperature, pH, dissolved oxygen, and salinity. Water clarity, which requ

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