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Journal articles on the topic 'ISO 12006'

Author: Grafiati

Published: 9 September 2021

Last updated: 29 July 2025

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1

Espinoza Brugman, Carlos Antonio, Frank Kevin Neri Caipo, and Alexandre Almeida Del Savio. "UAV, GNSS, Total Station, and Data Management Applied to an Ancient Clay Structure as a Historic Building Information Modeling Proposal: A Case Study of Huaca Arco Iris (Trujillo, Peru)." Heritage 7, no. 9 (2024): 4962–79. http://dx.doi.org/10.3390/heritage7090234.

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In light of current risks and environmental impacts, HBIM (historic building information modeling) offers a highly efficient and interactive method for managing historical data and representing the current states of ancient clay structures. In this study, traditional geodetic techniques were employed to digitally locate a structure without compromising its topographic information to create an accurate model. Tools such as total stations, GNSS receivers, and UAVs were utilized to generate detailed topography of the study site and its surroundings. An ontology-based data management structure was

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Cerezo-Narváez, Alberto, Andrés Pastor-Fernández, Manuel Otero-Mateo, and Pablo Ballesteros-Pérez. "Integration of Cost and Work Breakdown Structures in the Management of Construction Projects." Applied Sciences 10, no. 4 (2020): 1386. http://dx.doi.org/10.3390/app10041386.

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Scope management allows project managers to react when a project underperforms regarding schedule, budget, and/or quality at the execution stage. Scope management can also minimize project changes and budget omissions, as well as improve the accuracy of project cost estimates and risk responses. For scope management to be effective, though, it needs to rely on a robust work breakdown structure (WBS). A robust WBS hierarchically and faithfully reflects all project tasks and work packages so that projects are easier to manage. If done properly, the WBS also allows meeting the project objectives

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3

Volkodav, Vladimir A., and Ivan A. Volkodav. "Development of the structure and composition of a building information classifier towards the application of BIM technologies." Vestnik MGSU, no. 6 (June 2020): 867–906. http://dx.doi.org/10.22227/1997-0935.2020.6.867-906.

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Abstract Introduction. Various building information classification systems are used internationally; their critical analysis makes it possible to highlight basic requirements applicable to the Russian classifier and substantiate its structure and composition. Materials and methods. Modern international building information classification systems, such as OmniClass (USA), Uniclass 2015 (UK), CCS (Denmark), and CoClass (Sweden), are considered in the article. Their structure, composition, methodological fundamentals are analyzed. In addition to international classification systems, R

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Hotz, Walter, Marion Merklein, Andreas Kuppert, Harald Friebe, and Markus Klein. "Time Dependent FLC Determination Comparison of Different Algorithms to Detect the Onset of Unstable Necking before Fracture." Key Engineering Materials 549 (April 2013): 397–404. http://dx.doi.org/10.4028/www.scientific.net/kem.549.397.

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The ISO standard 12004-2:2008E for the determination of forming limit curves based on the section method was approved in 2008. About 4 years of measuring experience in different laboratories has shown advantages and weaknesses of the standard and is leading to some minor changes in the specification. In the years from the development of this standard until today a further technical development of the optical measuring devices occurred, so that it is now possible to determine forming limit curves using the time history of the test. This procedure of determination is referred to a time dependent

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Beard, Rodney. "N-FIRM OLIGOPOLY WITH GENERAL ISO-ELASTIC DEMAND." Bulletin of Economic Research 67, no. 4 (2013): 336–45. http://dx.doi.org/10.1111/boer.12009.

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Dogui, Kouakou, Olivier Boiral, and Iñaki Heras-Saizarbitoria. "Audit Fees and Auditor Independence: The Case of ISO 14001 Certification." International Journal of Auditing 18, no. 1 (2013): 14–26. http://dx.doi.org/10.1111/ijau.12008.

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7

Chang, Kiyoung, Yong-Cheol Kim, and Hyeongsop Shim. "Weak Firms Follow Strong Firms in Hot IPO Markets." Asia-Pacific Journal of Financial Studies 42, no. 1 (2013): 76–108. http://dx.doi.org/10.1111/ajfs.12006.

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Slota, Jan, Miroslav Jurčišin, Emil Spišák, and Marek Šiser. "EXPERIMENTAL FLC DETERMINATION OF HIGH STRENGTH STEEL SHEET METAL." Acta Metallurgica Slovaca 21, no. 4 (2015): 269. http://dx.doi.org/10.12776/ams.v21i4.639.

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To assess formability in sheet forming, experimentally determined Forming Limit Curves (FLC) are often used. These conventional FLCs represent the forming limits (i.e. onset of necking) of a sheet material subjected to in-plane deformation or almost in-plane deformation. A widely used approach to experimentally determine the onset of necking of sheet material subjected to in-plane and almost in-plane deformation is formulated in ISO 12004. The aim of this work is to investigate limit strains for deep drawing quality sheet metal of HX180BD made by ArcelorMittal with nominal thickness 0.6 mm. Th

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Ergin, Umit, and Sait Dundar Sofuoglu. "Određivanje svojstava obradivosti toplinski modificiranog drva sibirskog bora (Pinus sibirica)." Drvna industrija 74, no. 2 (2023): 139–52. http://dx.doi.org/10.5552/drvind.2023.0003.

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The main objective of this study is to determine the effect of heat treatment on the machiningproperties of solid wood material and determine the optimum cutting parameters to obtain surfaces with minimum surface roughness. In line with this goal, Siberian pine (Pinus sibirica) wood species, widely used in the woodworking and furniture industry, was chosen as the experimental material. The heat-treated (at a temperature of 190 °C for 2 hours) and untreated samples were machined using two different cutters (carbide upcut milling cutter and carbide compression milling cutter) with 5 mm diameter

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Chen, Chao, Haina Shi, and Haoping Xu. "Underwriter Reputation, Issuer Ownership, and Pre-IPO Earnings Management: Evidence from China." Financial Management 42, no. 3 (2013): 647–77. http://dx.doi.org/10.1111/fima.12006.

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11

Thamm, Aleksandra, Florian Thamm, Annette Sawodny, Sally Zeitler, Marion Merklein, and Andreas Maier. "Unsupervised Deep Learning for Advanced Forming Limit Analysis in Sheet Metal: A Tensile Test-Based Approach." Materials 16, no. 21 (2023): 7001. http://dx.doi.org/10.3390/ma16217001.

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An accurate description of the formability and failure behavior of sheet metal materials is essential for an optimal forming process design. In this respect, the forming limit curve (FLC) based on the Nakajima test, which is determined in accordance with DIN EN ISO 12004-2, is a wide-spread procedure for evaluating the formability of sheet metal materials. Thereby the FLC is affected by influences originating from intrinsic factors of the Nakajima test-setup, such as friction, which leads to deviations from the linear strain path, biaxial prestress and bending superposition. These disadvantage

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Timchenko, Vladimir S., Vladimir A. Volkodav, Ivan A. Volkodav, Olga V. Timchenko, and Nikita A. Osipov. "Development of building information classifier elements to create and maintain information models of capital construction objects in terms of design processes, construction process management and construction information." Vestnik MGSU, no. 7 (July 2021): 926–54. http://dx.doi.org/10.22227/1997-0935.2021.7.926-954.

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Introduction. Integral approach to the application of construction information in the creation and maintenance of information models of capital construction objects is key in the constant development of construction activities. Besides, according to the global trends, the direct implementation of construction activity including construction of especially complicated and unique objects and typification of classical ones requires application of a unified system of building information classification to optimize duration, costs and improve the quality of the constructed object. Development of the

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Shipitsyn, A. P., A. M. Nepomiluev, and A. E. Tyurnina. "Reference Materials for the Phase Transition Temperatures (Curie Temperature) Based on Alumel, Nickel and Iron Silicide." Measurement Standards. Reference Materials 19, no. 2 (2023): 35–46. http://dx.doi.org/10.20915/2077-1177-2023-19-2-35-46.

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The requirements for thermal analysis instruments are increasing in terms of their metrological support with the development of scientific and technological progress in the field of metrological supervision and electronics industry. The study of determining the phase transition temperature, namely the Curie temperature, is of particular relevance for the metrological support of the applied thermal analysis instruments and traceability to the basic physical units.The purpose of the research was to test the possibility of using materials based on alumel, nickel and iron silicide (trafoperm) as p

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Eom, Chanyoung, and Sang-Gyung Jun. "How Bookbuilding Information Affects Korean IPO Pricing Processes." Asia-Pacific Journal of Financial Studies 42, no. 6 (2013): 939–68. http://dx.doi.org/10.1111/ajfs.12036.

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15

Zhao, Hong, Shi Wei Yang, Ying Jie Qiao, and Xing Hong Zhang. "Wear-Resistant Properties of TiC/Fe Ceramic Composite Coating on Steel Plate via Combustion Synthesis." Advanced Materials Research 105-106 (April 2010): 435–37. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.435.

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The highly dense TiC/Fe ceramic coating was fabricated on Q235 steel surface by self- propagating high-temperature synthesis combined with pseudo hot iso-static pressing. The wear-resistant properties were examined by means of ball-on-disk contact wear test. The microstructure of TiC/Fe cermets coating was investigated. The results show that TiC/Fe cermets coating has an excellent wear-resistant property. There is little mass loss after 1200s under 30N loading under the condition of dry sliding wear testing. The major wear mechanisms are described by the following stages: sticking friction, gr

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Tomáš, Miroslav, Ján Slota, Emil Spišák, and Juraj Hudák. "Measurement of the Limit Strains on TS 245 Tinplate." Materials Science Forum 818 (May 2015): 213–16. http://dx.doi.org/10.4028/www.scientific.net/msf.818.213.

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The paper deals with measurement of limit strains for tinplate TS 245 made by US Steel with nominal thickness 0.3 mm. The FLC curve has been measured by implementation of Nakajima test on testing device Erichsen 145-60. The Nakajima test has been measured according to EN ISO 12004-2. Limit strains have been measured using 3D photogrammetric system Argus by GOM. Forming limit curve was evaluated in the software Argus. During test, some problems have been solved concerning friction on hemispherical punch which affected fracture position on the dome. Reached FLC curve was implemented in material

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17

Michel, Jean-Sébastien. "Return on Recent VC Investment and Long-Run IPO Returns." Entrepreneurship Theory and Practice 38, no. 3 (2013): 527–49. http://dx.doi.org/10.1111/etap.12005.

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Habeeb, Ali Hussein, Aseel Hamad Abed, and Abdullah Hamad Singal. "Numerical analysis of the effect of coefficient of friction on the formability behaviour of aluminium AA1060 in the stretch-forming process." Salud, Ciencia y Tecnología - Serie de Conferencias 3 (June 11, 2024): 868. http://dx.doi.org/10.56294/sctconf2024868.

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In sheet metal forming processes, the success of the forming process depends on several primary parameters such as the geometry of the tool, Sheet Material Properties, and the Friction in the contact area (tool/workpiece interface). In addition, the process parameters like punch crosshead, deformation temperature, surface roughness of both punch head and sheet blank, lubricant state, and the value of the applied load. Friction in the actual contact area plays a significant effect in obtaining a high-quality part and reducing the production cost. The study provides a new idea to specify the sui

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Yokoyama, Sadaji, Jun-ichi Hiramatsu та Kiyoshi Hayakawa. "Production of γ-aminobutyric acid from alcohol distillery lees by Lactobacillus brevis IFO-12005". Journal of Bioscience and Bioengineering 93, № 1 (2002): 95–97. http://dx.doi.org/10.1016/s1389-1723(02)80061-5.

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20

Francis, Bill B., Iftekhar Hasan, and Mingming Zhou. "Strategic Conservative Earnings Management of Technology Firms: Evidence from the IPO Market." Financial Markets, Institutions & Instruments 21, no. 5 (2012): 261–93. http://dx.doi.org/10.1111/fmii.12001.

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21

Vinueza Morales, Mariuxi Geovanna. "Análisis de la aplicación de los modelos de calidad de software en las empresas desarrolladoras asentadas en Quito y Guayaquil." Ciencia Unemi 5, no. 8 (2015): 93. http://dx.doi.org/10.29076/issn.2528-7737vol5iss8.2012pp93-101p.

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El presente trabajo da a conocer los resultados del proyecto Análisis de la aplicación de modelos decalidad de las empresas desarrolladoras de software asentadas en las ciudades de Quito y Guayaquil.Para determinar las metodologías y técnicas de calidad que se aplican en el desarrollo de software, serealizó una encuesta de 27 preguntas a determinada muestra de empresas, en la que intervino personalde desarrollo, también se consideró como fuente de información a los gerentes de las empresas desarrolladoras,a quienes se les realizó entrevistas. Los resultados presentados mediante gráficos estadí

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22

Banabic, Dorel, Lucian Lazarescu, and Dan Sorin Comsa. "Predictive Performances of FLC Using Marciniak-Kuczynski Model and Modified Maximum Force Criterion." Key Engineering Materials 651-653 (July 2015): 96–101. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.96.

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This paper is focused on the performance evaluation of two theoretical models that can be used to predict the Forming Limit Curve (FLC) for an AA6016-T4 aluminium alloy sheet. The FLC is calculated based on the Marciniak-Kuczynski (M-K) model and the Modified Maximum Force Criterion (MMFC) using the Hill '48, Barlat '89 and BBC 2005 yield criteria, the latter identified in three variants, namely with 6, 7, and 8 material parameters. The performance assessment of the M-K and MMFC models combined with different yield functions is based on the comparison between the theoretical predictions and th

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23

Górka, Jacek, Monika Kciuk, and Sebastian Stano. "Assessment of the Corrosion Resistance and the Mechanical Properties of Laser Welded Joints Made of Steel DOCOL 1200M." Biuletyn Instytutu Spawalnictwa, no. 2 (April 2022): 7–14. http://dx.doi.org/10.17729/ebis.2022.2/1.

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The article presents test results concerning the corrosion resistance of laser beam welded joints made of steel DOCOL 1200M. The thickness of the joints subjected to the tests amounted to 1.8 mm. The joints were welded in the flat position (PA), without the use of the filler metal; the linear welding energy was restricted within the range of 25 J/mm to 55 J/mm. The non-destructive tests revealed that the joints represented quality level B in accordance with the ISO 13919 standard. The results of mechanical tests demonstrated the possibility of obtaining joints, the strength of which equalled t

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Singh, Pundan K., Rudra B. Sarkar, Abhishek Raj, and Rahul K. Verma. "Forming limit diagram generation with reduced experiments and modelling for different grades of automotive sheet steel using CrachLab." Journal of Strain Analysis for Engineering Design 52, no. 5 (2017): 298–309. http://dx.doi.org/10.1177/0309324717714095.

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Forming limit diagram is one of the most commonly used failure criteria for sheet metal forming analysis. Forming limit diagram generation is time-consuming, and therefore, any reduction in the test requirements will be useful for the industry. In this work, a novel method has been proposed to generate such forming limit diagram with significantly reduced experimental efforts. The proposed new method is based on a combination of fewer experiments and the use of CrachLab (developed by MATFEM), which is based on the numerical modelling of tensile instability using Marciniak–Kuczynski method or M

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Ayachi, Nejia, Noamen Guermazi, Cong Hanh Pham, and Pierre-Yves Manach. "Development of a Nakazima Test Suitable for Determining the Formability of Ultra-Thin Copper Sheets." Metals 10, no. 9 (2020): 1163. http://dx.doi.org/10.3390/met10091163.

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The objective is to propose an accurate method for determining the forming limit curves (FLC) for ultra-thin metal sheets which are complex to obtain with conventional techniques. Nakazima tests are carried out to generate the FLCs of a pure copper and a copper beryllium alloy with a thickness of 0.1 mm. Because of the very small thickness of the sheets, the standard devices and the know-how of this test are no longer valid. Consequently, new tools have been designed in order to limit friction effect. Two different methods are used and compared to estimate the necking: the position-dependent m

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Pham, Quoc Tuan, Md Shafiqul Islam, Alexander Barlo, and Mats Sigvant. "An evaluation method for experimental necking detection of automotive sheet metals." IOP Conference Series: Materials Science and Engineering 1284, no. 1 (2023): 012020. http://dx.doi.org/10.1088/1757-899x/1284/1/012020.

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Abstract In sheet metal stamping, the occurrence of strain localization in a deformed sheet is considered a failure. As so, sheet metal’s formability is conventionally evaluated using the Forming Limit Diagram (FLD), which separates the principal strain space into safety and unsafety regions by a Forming Limit Curve (FLC). This study presents an evaluation method for detecting strain localization based on Digital Image Correlation (DIC) during the experiment. The commercial DIC software ARAMIS is adopted to monitor the strain-field distribution on the deformed specimen’s surface. A detailed an

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Qi, Zhanhui, Jun Wang, Yuze Mao, Hongmei Liu, and Jianguang Fang. "Feasibility of Offshore Co-culture of Abalone,Haliotis discus hannai Ino, and Sea Cucumber,Apostichopus japonicus, in a Temperate Zone." Journal of the World Aquaculture Society 44, no. 4 (2013): 565–73. http://dx.doi.org/10.1111/jwas.12056.

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NAKAMURA, Hisao, Kayoko YABUMOTO, Sadaji YOKOYAMA, Junichi HIRAMATSU, Kojiro TAKAHASHI, and Minako YOSHIZAWA. "Effects of ^|^gamma;-Aminobutyric acid rich Kome Shochu Kasu fermented with Lactobacillus brevis IFO-12005 toward Spontaneously Hypertensive Rats." JOURNAL OF THE BREWING SOCIETY OF JAPAN 98, no. 3 (2003): 221–24. http://dx.doi.org/10.6013/jbrewsocjapan1988.98.221.

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Stancu, Cristina, Dawid Dębski, and Jacek Michalak. "Construction Products between Testing Laboratory and Market Surveillance: Case study of Cementitious Ceramic Tile Adhesives." Materials 15, no. 17 (2022): 6167. http://dx.doi.org/10.3390/ma15176167.

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This article presents the results of the interlaboratory comparison (ILC) study of the following four characteristics of ceramic tile adhesives (CTAs): initial tensile adhesion strength, tensile adhesion strength after heat ageing, tensile adhesion strength after immersion in water, and tensile adhesion strength after freeze–thaw cycles. The results showed that the objective of the ILC was achieved—the z-score analysis carried out following ISO 13528 allowed for classifying all results obtained by 23 laboratories out of 27 as satisfactory. The results of the remaining four laboratories were ra

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Santos, Rafael O., Luciano P. Moreira, Marilena C. Butuc, Gabriela Vincze, and António B. Pereira. "Damage Analysis of Third-Generation Advanced High-Strength Steel Based on the Gurson–Tvergaard–Needleman (GTN) Model." Metals 12, no. 2 (2022): 214. http://dx.doi.org/10.3390/met12020214.

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The third generation of advanced high-strength steels (AHSS) brought attention to the steel and automotive industries due to its good compromise between formability and production costs. This work evaluated a third-generation AHSS (USS CR980XG3TM) through microstructural and X-ray diffraction (XRD) analyses, uniaxial tensile and plane-strain tension testing, and numerical simulations. The damage behavior of this steel is described with the Gurson–Tvergaard–Needleman (GTN) model using an identification procedure based on the uniaxial tensile and initial microvoids data. The microstructure of th

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Gutiérrez, David, A. Lara, Daniel Casellas, and Jose Manuel Prado. "Effect of Strain Paths on Formability Evaluation of TRIP Steels." Advanced Materials Research 89-91 (January 2010): 214–19. http://dx.doi.org/10.4028/www.scientific.net/amr.89-91.214.

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The Forming Limit Diagrams (FLD) are widely used in the formability analysis of sheet metal to determine the maximum strain, which gives the Forming Limit Curve (FLC). It is well known that these curves depend on the strain path during forming and hence on the test method used to calculate them. In this paper, different stretching tests such as the Nakajima and the Marciniak tests were performed, with different sample geometries to obtain points in different areas of the FLD. An optical analysis system was used, which allows following the strain path during the test. The increasing use of adva

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Korkmaz, Mustafa, Mehmet Budakçı, and İzham Kılınç. "Assessment of surface roughness in milling of wood with different material temperature and cutting parameters." BioResources 19, no. 4 (2024): 9343–57. http://dx.doi.org/10.15376/biores.19.4.9343-9357.

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Effects of wood temperature were studied during CNC router processing relative to the resulting surface roughness, addressing a considerable gap in wood machining research. Three wood species (Scots pine, beech, and poplar) were machined at four temperatures (-20 °C, 0 °C, 20 °C, and 50 °C) to simulate diverse climatic conditions. The experiments were conducted at varied spindle speeds (6000, 12000, and 18000 rpm) and feed rates (3000 and 6000 mm/min). Surface roughness was measured using a portable tester in accordance with relevant ISO standards. A full factorial design was used to evaluate

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DiCecco, Sante, Kenneth Cheong, Farinaz Khameneh, Zhi Deng, Michael Worswick, and Cliff Butcher. "Formability Characterization Using Curvature and Strain-Rate-Based Limit Strain Detection Methods Applied to Marciniak, Nakazima, and Stretch-Bend Tests." Metals 14, no. 10 (2024): 1164. http://dx.doi.org/10.3390/met14101164.

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Despite advancements in the characterization of forming limit curves (FLCs) with the development of stereoscopic digital image correlation (DIC), there is still uncertainty in the accuracy of the limit strains, especially in forming operations with out-of-plane bending. The ISO12004-2:2008 standard offers a standardized approach to FLC determination but is not without limitations and is not always applicable to new materials and forming processes (e.g., warm forming, hot stamping). In the present work, a physically based limit strain detection technique is developed, termed the Enhanced Curvat

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Stancu, Cristina, and Jacek Michalak. "Interlaboratory Comparison as a Source of Information for the Product Evaluation Process. Case Study of Ceramic Tiles Adhesives." Materials 15, no. 1 (2021): 253. http://dx.doi.org/10.3390/ma15010253.

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In this study, the results obtained by 19 laboratories participating in 2 editions of the interlaboratory comparison (ILC) determining 2 properties of ceramic tiles adhesives (CTAs), i.e., initial tensile adhesion strength and tensile adhesion strength after water immersion following EN 12004, were analyzed. The results show that participating laboratories maintain a constant quality of their work. The use of z-score analysis, under ISO 13528, allows for classifying 89.5% to 100% of laboratories as satisfactory, depending on the measurement’s kind and edition. The remaining laboratories are cl

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Michalak, Jacek, and Radosław Ziomek. "Assessment of Cementitious Ceramic Tile Adhesives in the Light of Repeatability and Reproducibility of the Tensile Adhesion Strength Measurements." Materials 16, no. 12 (2023): 4245. http://dx.doi.org/10.3390/ma16124245.

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The paper presents the results of tensile adhesion strength measurements of ceramic tile adhesive (CTA) stored in various conditions performed by ten operators in one laboratory using the same equipment and auxiliary materials. The obtained results allowed the authors to estimate the repeatability and reproducibility of the tensile adhesion strength measurement method using the methodology following ISO 5725-2:1994+AC1:2002. Standard deviations of repeatability ranging from 0.09 to 0.15 for the general means value in the range of 0.89–1.76 MPa and standard deviations of reproducibility ranging

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Ellikkal, Adil, S. Rajamohan, and M. Om Prakash. "IPOs in Indian Stock Market: Analyzing Pricing and Performance of IPO Listed in 2021." Shanlax International Journal of Management 10, no. 2 (2022): 1–8. http://dx.doi.org/10.34293/management.v10i2.5144.

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The covid-19 pandemic has had unprecedented effects on the world economy. All countries, including India, have gone through this crisis. The coronavirus reported in India in March 2020 has spread across the nation, affecting all industries. Like other sectors of the economy, the pandemic has adversely affected the Indian stock market. In March 2021, the value of the Nifty and Sensex, two important indices, fell from 12000 points to 8000 points and 32000 points to 17000 points, respectively. The initial wave continued till the end of the year. However, 2021 has been a bumper year for the stock

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Liewald, Mathias, and Klaus Drotleff. "Novel Punch Design for Nonlinear Strain Path Generation and Evaluation Methods." Key Engineering Materials 639 (March 2015): 317–24. http://dx.doi.org/10.4028/www.scientific.net/kem.639.317.

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The forming limit curve (FLC) is a common method to assess material formability in sheet metal forming processes. It is determined with the Nakajima or Marciniak test according to ISO 12004-2 [1]. The disadvantage of these test procedures is that the results are only valid for linear strain paths. In most real sheet metal forming processes, like deep-drawing of complex car body parts or multi-step processes, nonlinear strain paths exist. It is well-known that the classic FLC cannot describe material failure for nonlinear strain paths.At the Institute for Metal Forming Technology (IFU), new pun

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Jaremenko, Christian, Nishant Ravikumar, Emanuela Affronti, Marion Merklein, and Andreas Maier. "Determination of Forming Limits in Sheet Metal Forming Using Deep Learning." Materials 12, no. 7 (2019): 1051. http://dx.doi.org/10.3390/ma12071051.

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The forming limit curve (FLC) is used to model the onset of sheet metal instability during forming processes e.g., in the area of finite element analysis, and is usually determined by evaluation of strain distributions, derived with optical measurement systems during Nakajima tests. Current methods comprise of the standardized DIN EN ISO 12004-2 or time-dependent approaches that heuristically limit the evaluation area to a fraction of the available information and show weaknesses in the context of brittle materials without a pronounced necking phase. To address these limitations, supervised an

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Jaremenko, Christian, Emanuela Affronti, Andreas Maier, and Marion Merklein. "Analysis of Forming Limits in Sheet Metal Forming with Pattern Recognition Methods. Part 2: Unsupervised Methodology and Application." Materials 11, no. 10 (2018): 1892. http://dx.doi.org/10.3390/ma11101892.

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The forming limit curve (FLC) is used in finite element analysis (FEA) for the modeling of onset of sheet metal instability during forming. The FLC is usually evaluated by achieving forming measurements with optical measurement system during Nakajima tests. Current evaluation methods such as the standard method according to DIN EN ISO 12004-2 and time-dependent methods limit the evaluation range to a fraction of the available information and show weaknesses in the context of brittle materials that do not have a pronounced constriction phase. In order to meet these challenges, a supervised patt

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Francke, Robert, Patrick Enders, Tobias Taeufer, Katrina Prane, and Adrian Prudlik. "Selective Newman-Kwart Rearrangement Under Mild Conditions Enabled by Heterogeneous Photocatalysis and Electrochemical Catalysis." ECS Meeting Abstracts MA2023-02, no. 52 (2023): 2525. http://dx.doi.org/10.1149/ma2023-02522525mtgabs.

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The Newman-Kwart Rearrangement (NKR), the key-step in the three-stage conversion of phenols 1 into thiophenols 4 (see figure below), holds numerous applications in various fields [1]. Usually, the NKR proceeds via thermally induced intramolecular nucleophilic ipso substitution. High temperatures up to 300 °C are required to facilitate the rearrangement, especially for electron-rich substrates, causing side reactions and high energy consumption [1]. Over the past decade, several improved protocols have appeared that enable selective conversion under milder conditions. These methods are based ei

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Wilson, Jules, Rupp Carriveau, William Hurley, Reza Babaei, and David S.-K. Ting. "Electrifying Maritime Shipping: Evaluating the CO₂ Reduction and Viability of Future Battery-Powered Container Ships Calling at the Port of Los Angeles." Journal of Physics: Conference Series 2929, no. 1 (2024): 012007. https://doi.org/10.1088/1742-6596/2929/1/012007.

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Abstract Maritime shipping plays a pivotal role in global logistics, influencing efficiency, emissions, and adaptability. This academic study envisions future electrified shipping fleets and evaluates the potential for CO2 reduction and the cost delta between grid electricity and marine fossil fuels using three types of container ships (5000-7999 TEU, 8000-11999 TEU, and 12000-14499 TEU). The scenario evaluated envisions an electrical charging infrastructure at the Port of Los Angeles, supported fully by wind and solar energy sources, to recharge future battery-powered ships. It is recognized

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Nnodim, Johnkennedy, Emejulu Adamma, and Elendu Humphrey Ndubueze. "Evaluation of Serum Hepatocellular Enzymes in Nigerian with Goitre." Asian Journal of Medical Sciences 2, no. 2 (2011): 79–81. http://dx.doi.org/10.3126/ajms.v2i2.3870.

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Objective: The determination of serum gammaglutamyl transferase (GGT),alkaline phosphatase(ALP), aspartate aminotransferase (AST) and alanine aminotransferase (ALT) in patient with goitre in Owerri, Imo state Nigeria were investigated.Material & Methods: Thirty confirmed patients with goitre age 50 to 70years with the following thyroid index (Total T4 > 140.65±7.28nmol/l , Total T3 > 2.43±0.96nmol/l, Free T4 < 50.24±9.11nmol/l and TSH > 4.12±1.00nmol/l) were selected for the study. Thirty normal subjects free from goiter age 50 to 70 years were used as control. Patients with co

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Johnkennedy Nnodim, Emejulu Adamma, and Elendu Humphrey Ndubueze. "Evaluation of Serum Hepatocellular Enzymes in Nigerian with Goitre." Asian Journal of Medical Sciences 2, no. 2 (2011): 79–81. https://doi.org/10.71152/ajms.v2i2.3238.

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Objective: The determination of serum gammaglutamyl transferase (GGT),alkaline phosphatase(ALP), aspartate aminotransferase (AST) and alanine aminotransferase (ALT) in patient with goitre in Owerri, Imo state Nigeria were investigated.Material & Methods: Thirty confirmed patients with goitre age 50 to 70years with the following thyroid index (Total T4 > 140.65±7.28nmol/l , Total T3 > 2.43±0.96nmol/l, Free T4 < 50.24±9.11nmol/l and TSH > 4.12±1.00nmol/l) were selected for the study. Thirty normal subjects free from goiter age 50 to 70 years were used as control. Patients with co

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Табакаев, Роман Борисович, Александр Владимирович Астафьев, Александр Сергеевич Ивашутенко, Николай Алексеевич Языков та Александр Сергеевич Заворин. "ИЗМЕНЕНИЕ ТЕПЛОФИЗИЧЕСКИХ ХАРАКТЕРИСТИК БИОМАССЫ С РАЗЛИЧНОЙ ДОЛЕЙ МИНЕРАЛИЗАЦИИ В ПРОЦЕССЕ МЕДЛЕННОГО ПИРОЛИЗА". Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov 332, № 3 (2021): 74–84. http://dx.doi.org/10.18799/24131830/2021/3/3103.

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Актуальность исследования обусловлена необходимостью изучения изменения теплофизических характеристик биомассы в процессе её термического преобразования применительно к проектированию технологического оборудования и энергетическому использованию. Цель: изучение теплофизических характеристик биомассы с различной долей минерализации в процессе её медленного пиролиза. Объекты: ресурсы биомассы, имеющие различную степень минерализации – солома (Ad=2,8 %), некондиционные пшеничные отруби (Ad=6,9 %), низинный торф Суховского месторождения (Ad=22,8 %). Методы. Теплотехнические характеристики образцов

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Palumbo, G., Antonio Piccininni, Pasquale Guglielmi, Donato Sorgente, Leonardo Daniele Scintilla, and Luigi Tricarico. "Application of the Warm Hydroforming Process to the Manufacturing of Pre-Aged 6xxx Series Components Using a Numerical/Experimental Approach." Key Engineering Materials 622-623 (September 2014): 701–8. http://dx.doi.org/10.4028/www.scientific.net/kem.622-623.701.

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In this work the Warm Hydroforming (WHF) process for the production of a 6xxx series Al alloy component has been investigated using a numerical/experimental approach: both experimental and numerical hydroforming tests were carried out using the alloy AC170PX, a pre aged (T4 condition) Al alloy often adopted for automotive applications. In order to evaluate both the mechanical and strain behaviour of the material, tensile tests were carried out at different temperature and strain rate levels using the Gleeble system 3180, keeping also into account the ageing effect; in addition, formability (Na

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Rzeźnikiewicz, Agnieszka, Jacek Górka, Mateusz Przybyła, and Monika Kciuk. "ASSESSMENT OF PROPERTIES AND CORROSION RESISTENCE OF GALVANIZED STEEL WELDED WITH LASER BEAM." International Journal of Modern Manufacturing Technologies 15, no. 3 (2023): 155–66. http://dx.doi.org/10.54684/ijmmt.2023.15.3.155.

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The paper describes the influence of laser welding parameters on the structure, mechanical properties and corrosion resistance of 1.2 mm thick galvanized sheets made of DC04 low-carbon steel. The tested test joints were made with a disc laser on a robotic laser welding station (TruLaser Robot 5120) with a TruDisk 12002 laser. In the laser welding process, butt welded joints were made without additional material with variable welding speed (linear welding energy from 30 to 45 J/mm). Welded joints were subjected to non-destructive tests (visual, magnetic-particle and radiographic tests), destruc

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Affronti, Emanuela, Christian Jaremenko, Marion Merklein, and Andreas Maier. "Analysis of Forming Limits in Sheet Metal Forming with Pattern Recognition Methods. Part 1: Characterization of Onset of Necking and Expert Evaluation." Materials 11, no. 9 (2018): 1495. http://dx.doi.org/10.3390/ma11091495.

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In automotive manufacturing, high strength materials, and aluminum alloys are widely used to address the requirement of ensuring a lightweight car body and correspondingly, reducing pollution. In this context of complexity of materials and structures, an optimized process design with finite element analyses (FEA) is mandatory, as well as a correct definition of the material forming limits. For this purpose, in sheet metal forming, the forming limit curve (FLC) is used. The FLC is defined by the onset of necking. The standard evaluation method according to DIN EN ISO 12004-2 is based on the cro

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COOKEY, CHINAEKWU, Rosemary Keyagha, Ogechukwu Umeh, et al. "Efficacy of poultry manure and biochar of cassava peels on root-gall nematode (Meloidogyne incognita) of okra (Abelmoschus esculentus) in an endemic Ultisol." International Journal of Agricultural Technology 21, no. 2 (2025): 491–506. https://doi.org/10.63369/ijat.2025.21.2.491-506.

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In an endemic ultisol, the efficacy of poultry manure and biochar derived from cassava peels against the root-gall nematode of okra was investigated at Undergraduate Demonstrative Farms, Federal University of Technology, Owerri, Imo State, Nigeria. With four replicates, the field trial was a 2x4 factorial in a randomized complete block design. Two types of okra, Maha and Dizengoff okra, were used in the treatments, along with three organic soil amendments: poultry manure, biochar made from cassava peels, biochar made from cassava peels with poultry, and the control. The number of leaves, heigh

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Agha, Akshat, and Fadi Abu-Farha. "A Method for Measuring In-Plane Forming Limit Curves Using 2D Digital Image Correlation." SAE International Journal of Materials and Manufacturing 16, no. 3 (2023). http://dx.doi.org/10.4271/05-16-03-0019.

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<div>With the introduction of advanced lightweight materials with complex microstructures and behaviors, more focus is put on the accurate determination of their forming limits, and that can only be possible through experiments as the conventional theoretical models for the forming limit curve (FLC) prediction fail to perform. Despite that, CAE engineers, designers, and toolmakers still rely heavily on theoretical models due to the steep costs associated with formability testing, including mechanical setup, a large number of tests, and the cost of a stereo digital image correlation (DIC)

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Smolyar, V., and V. Rozhenko. "MILKING EQUIPMENT OF " YALYNKA" (“HERRINGBONE”) "EUROCLASS 1200" TYPE TESTING RESULTS." Technical and technological aspects of development and testing of new machinery and technologies for agriculture of Ukraine, no. 29(43) (December 2021). http://dx.doi.org/10.31473/2305-5987-2021-1-29(43)-8.

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Abstract The purpose of the research is – to evaluate the milking platform of "Yalynka" ("Herringbone") "EuroClass 1200" type manufactured by "GEA" (Germany) for milking cows based on the results of experimental testing. Research methods. During the testing of the milking parlor "Yalynka" "EuroClass 1200" type the quality of the technological process was determined using the methods described in ISO 5707:2007, ISO 6690:2007, DSTU 7435:2013 and DSTU 3662:2018, operational-technological and economic evaluation was carried out according to DSTU 8424:2015 and DSTU 4397:2005, safety and ergonomics

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