Browse by research area

  1. Published

    Metal Binder Jetting - Erste Konstruktionsempfehlungen für Bohrungen und Kanäle

    Blunk, H. & Seibel, A., 2024, In: Konstruktion. 76, 6-7, p. 61-66 6 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  2. Published

    Microstructure refinement by a novel friction-based processing on Mg-Zn-Ca alloy

    Chen, T., Fu, B., Shen, J., Suhuddin, U. F. H. R., Wiese, B., Dos Santos, J. F., Bergmann, J. P. & Klusemann, B., 2024, Material Forming, ESAFORM 2024: The 27th International ESAFORM Conference on Material Forming – ESAFORM 2024. Araujo, A. C., Cantarel, A., Chabert, F., Korycki, A., Olivier, P. & Schmidt, F. (eds.). Millersville, PA : Association of American Publishers, p. 2031-2040 10 p. (Materials Research Proceedings; vol. 41).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  3. On the Effectiveness of Triply-Periodic Minimal Surface Structures for Heat Sinks Used in Automotive Applications

    Czekalla, M. & Seibel, A., 2024, Industrializing Additive Manufacturing: Proceedings of AMPA2023. Klahn, C., Meboldt, M. & Ferchow, J. (eds.). Cham: Springer International Publishing AG, p. 353-364 12 p. (Springer Tracts in Additive Manufacturing).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  4. Published

    Preface (Editorial)

    Zhou, F., Mercorelli, P., Han, Y., Idris, N. R. N., Dong, W., Andreescu, G. D., Bose, B. K., Singh, R., Carbone, G., Kolhe, M. L., Iqbal, K., Amer, G., Anggono, W., Liu, C., Dwivedi, P. & Aly, H., 2024, 4th International Conference on Electrical Engineering and Computer Technology (ICEECT 2024). 1 ed. IOP Publishing Ltd, Vol. 2917. 2 p. (Journal of Physics: Conference Series; vol. 2917).

    Research output: Contributions to collected editions/worksOtherResearch

  5. Published

    Processability of Mg-Gd Powder via Friction Extrusion

    Rath, L., Chan, C., Suhuddin, U., Buresch, H., Ebel, T. & Klusemann, B., 2024, Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity - ICTP 2023 - Volume 1. Mocellin, K., Bouchard, P.-O., Bigot, R. & Balan, T. (eds.). Springer Science and Business Media Deutschland GmbH, p. 431-441 11 p. (Lecture Notes in Mechanical Engineering).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  6. Published

    Reduction of Anisotropic Mechanical Properties During Extrusion by Means of Additively Manufactured Dies

    Esterl, F., Nienaber, M., Bohlen, J. & Ben Khalifa, N., 2024, Extended Abstract Book of the 9th JSTP International Seminar on Precision Forging : March 11–14 2024, Kyoto, Japan. Terano, M. & Matsumoto, R. (eds.). Kyoto: Japan Society for Technology of Plasticity, p. 29-30 2 p.

    Research output: Contributions to collected editions/worksPublished abstract in conference proceedingsResearch

  7. Published

    Robust Maneuver Planning With Scalable Prediction Horizons: A Move Blocking Approach

    Schitz, P., Dauer, J. C. & Mercorelli, P., 2024, In: IEEE Control Systems Letters. 8, p. 1907-1912 6 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  8. Published

    Sliding Mode Control Strategies for Maglev Systems Based on Kalman Filtering

    Diab, M., Mercorelli, P. & Haus, B., 2024, Power Engineering and Intelligent Systems - Proceedings of PEIS 2024. Shrivastava, V., Bansal, J. C. & Panigrahi, B. K. (eds.). Springer Science and Business Media Deutschland GmbH, p. 85-98 14 p. (Lecture Notes in Electrical Engineering; vol. 1247 LNEE).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  9. Published

    Study on the effects of tool design and process parameters on the robustness of deep drawing

    Heinzel, C., Thiery, S. & Ben Khalifa, N., 2024, Material Forming, ESAFORM 2024: the 27th International ESAFORM Conference on Material Forming - ESAFORM 2024 - held in Toulouse (France), at the Pierre Baudis Convention Center between 24-26th April, 2024. Araujo, A. C., Cantarel, A., Chabert, F., Korycki, A., Olivier, P. & Schmidt, F. (eds.). Millersville: MaterialsResearchForum LLC, p. 1488-1497 10 p. (Materials Research Proceedings; vol. 41).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  10. Toward Automated Topology Optimization: Identification of Non-Design Features of CAD Models Using Graph Neural Networks

    Jasinski, M., Schöfer, F. & Seibel, A., 2024, Industrializing Additive Manufacturing: Proceedings of AMPA2023. Klahn, C., Meboldt, M. & Ferchow, J. (eds.). Cham: Springer International Publishing AG, p. 267-279 13 p. (Springer Tracts in Additive Manufacturing; vol. Part F3256).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  11. Published

    Untersuchung von stochastischen Einflüssen auf die Optimierungsqualität im Schöpfwerksbetrieb in der Hinterlandentwässerung

    Hempel, M. C. & Heger, J., 2024, Simulation in Umwelt- und Geowissenschaften: Workshop Leipzig 2024. Wittmann, J. & Müller, M. (eds.). Düren: Shaker Verlag, p. 149 - 162 14 p. (Simulation in Umwelt- und Geowissenschaften).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  12. Published

    Work-in-Progress: Technology-Driven Introductory Phase in Engineering Sciences for Sustainable Individual Support of Students’ Academic Success

    Block, B. M., Dethmann, J. & Haus, B., 2024, Smart Technologies for a Sustainable Future - Proceedings of the 21st International Conference on Smart Technologies and Education. Volume 1. Auer, M. E., Langmann, R., May, D. & Roos, K. (eds.). Springer Science and Business Media Deutschland GmbH, p. 146-154 9 p. (Lecture Notes in Networks and Systems; vol. 1027 LNNS).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  13. Hot deformation behavior of novel high-strength Mg-0.6Mn-0.5Al-0.5Zn-0.4Ca alloy

    Chen, H., Yang, Y., Hu, C., Zhou, G., Shi, H., Jiang, G., Huang, Y., Hort, N., Xie, W. & Wei, G., 01.12.2023, In: International Journal of Minerals, Metallurgy and Materials. 30, 12, p. 2397-2410 14 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  14. Published

    Author Correction: Feasibility of orbital friction stir welding on clad pipes of API X65 steel and Inconel 625 (Scientific Reports, (2023), 13, 1, (10669), 10.1038/s41598-023-37913-4)

    Amavisca, C. V., Bergmann, L., de, C. R., Schroeder, J. G., Ramos, F. D., Lemos, G. V. B., Reguly, A. & Klusemann, B., 12.2023, In: Scientific Reports. 13, 1, 1 p., 11959.

    Research output: Journal contributionsOther (editorial matter etc.)Research

  15. Published

    Feasibility of orbital friction stir welding on clad pipes of API X65 steel and Inconel 625

    Amavisca, C. V., Bergmann, L., Lessa, C. R. D. L., Schroeder, J. G., Ramos, F. D., Lemos, G. V. B., Reguly, A. & Klusemann, B., 12.2023, In: Scientific Reports. 13, 1, 10 p., 10669.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  16. Published

    Friction Stir Welding of Various Aluminium Alloys to Titanium

    Grassel, S. F., Bergmann, L. & Klusemann, B., 29.11.2023, In: Key Engineering Materials. 966, p. 49-54 6 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  17. Published

    Development and prospects of degradable magnesium alloys for structural and functional applications in the fields of environment and energy

    Huang, Y., Zhang, Y., Song, J., Pan, F., Willumeit-Römer, R., Kainer, K. U. & Hort, N., 27.11.2023, In: Journal of Magnesium and Alloys. 11, 11, p. 3926-3947 22 p.

    Research output: Journal contributionsScientific review articlesResearch

  18. Published

    Agricultural Water Quality Control System Methods

    Mulder, S., Niekerk, T. I. V. & Mercorelli, P., 17.11.2023, International Conference on Electrical, Computer and Energy Technologies, ICECET 2023. Piscataway: IEEE - Institute of Electrical and Electronics Engineers Inc., p. 1-5 5 p. 10389422. (International Conference on Electrical, Computer and Energy Technologies, ICECET 2023).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  19. Published

    Friction surfacing of aluminum to steel: Influence of different substrate surface topographies

    Roos, A., Metternich, F., Kallien, Z., Baumann, J., Ehrich, J., Kipp, M., Hanke, S., Biermann, D. & Klusemann, B., 01.11.2023, In: Materials and Design. 235, 12 p., 112390.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  20. Published

    Microstructure evolution and texture development during production of homogeneous fine-grained aluminum wire by friction extrusion

    Suhuddin, U. F. H., Rath, L., Halak, R. M. & Klusemann, B., 01.11.2023, In: Materials Characterization. 205, 13 p., 113252.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  21. Published

    Process parameter assessment on the dissimilar deposition of AA2024-T351 on AA7475-T761 by friction surfacing

    Brandes, A. C., Roos, A., Klusemann, B., Martins, J. D. P., dos Santos, J. F. & Carvalho, A. L. M., 01.11.2023, In: Journal of Materials Research and Technology. 27, p. 7593-7605 13 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  22. Published

    Review existing strategies to improve circularity, sustainability and resilience of wind turbine blades - A comparison of research and industrial initiatives in Europe

    Kramer, K. & Beauson, J., 01.11.2023, IOP Conference Series: Materials Science and Engineering. I. O. P. (ed.). 1 ed. Bristol: IOP Publishing Ltd, Vol. 1293. 21 p. 012039. (IOP conference series / Materials science and engineering; vol. 1293).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  23. Published

    Advances in Laser Positioning of Machine Vision System and Their Impact on 3D Coordinates Measurement

    Nunez-Lopez, J. A., Sergiyenko, O., Alaniz-Plata, R., Sepulveda-Valdez, C., Perez-Landeros, O. M., Tyrsa, V., Flores-Fuentes, W., Rodriguez-Quinonez, J. C., Murrieta-Rico, F. N., Mercorelli, P., Kartashov, V. & Kolendovska, M., 16.10.2023, IECON 2023 - 49th Annual Conference of the IEEE Industrial Electronics Society. Piscataway: IEEE - Institute of Electrical and Electronics Engineers Inc., 6 p. (IECON Proceedings (Industrial Electronics Conference)).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  24. Effect of extrusion and rotary swaging on the microstructural evolution and properties of Mg-5Li-5.3Al-0.7Si alloy

    Chen, H., Zhang, M., Kong, F., Li, B., Cui, X., Huang, Y., Hort, N., Willumeit-Römer, R., Xie, W. & Wei, G., 03.10.2023, In: Materials Science & Engineering A. 885, 145627.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  25. Published

    Fast template match algorithm for spatial object detection using a stereo vision system for autonomous navigation

    Real-Moreno, O., Rodríguez-Quiñonez, J. C., Sergiyenko, O., Flores-Fuentes, W., Mercorelli, P., Valdez-Rodríguez, J. A., Trujillo-Hernández, G. & Miranda-Vega, J. E., 01.10.2023, In: Measurement: Journal of the International Measurement Confederation. 220, 113299.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  26. Model-Based Optimization of Spiral Coils for Improving Wireless Power Transfer

    Ben Fadhel, Y., Bouattour, G., Bouchaala, D., Derbel, N. & Kanoun, O., 01.10.2023, In: Energies. 16, 19, 17 p., 6886.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  27. Published

    Refill friction stir spot welding of thermoplastic composites: Case study on Carbon-fiber-reinforced polyphenylene sulfide

    Schäfer, H., Blaga, L. A., Stöver, E. & Klusemann, B., 01.10.2023, In: Thin-Walled Structures. 191, 111037.

    Research output: Journal contributionsJournal articlesResearch

  28. Published

    Correlation of Microstructure and Local Mechanical Properties Along Build Direction for Multi-layer Friction Surfacing of Aluminum Alloys

    Kallien, Z., Hoffmann, M., Roos, A. & Klusemann, B., 10.2023, In: JOM: Journal of The Minerals, Metals & Materials Society. 75, 10, p. 4212-4222 11 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  29. Published

    Applying FIDIC contracts in Jordan

    Madi, H. & Malhas, F., 20.09.2023, FIDIC Contracts in Africa and the Middle East: A Practical Guide to Application. Charrett, D. (ed.). Taylor and Francis Inc., p. 168-203 36 p.

    Research output: Contributions to collected editions/worksChapterpeer-review

  30. Published

    Microstructural development of as-cast AM50 during Constrained Friction Processing: grain refinement and influence of process parameters

    de Castro, C. C., Shen, J., dos Santos, J. F. & Klusemann, B., 01.09.2023, In: Journal of Materials Processing Technology. 318, 11 p., 118018.

    Research output: Journal contributionsJournal articlesResearch

  31. Published

    Microstructural evolution of Mg–14Gd–0.4Zr alloy during compressive creep

    Shi, H., Huang, Y., Yang, L., Liu, C., Dieringa, H., Lu, C., Xiao, L., Willumeit-Römer, R. & Hort, N., 01.09.2023, In: Journal of Magnesium and Alloys. 11, 9, p. 3161-3173 13 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  32. Published

    Compressive creep behavior and microstructural evolution of sand-cast and peak-aged Mg–12Gd–0.4Zr alloy at 250 °C

    Shi, H., Huang, Y., Yang, L., Liu, C., Dieringa, H., Lu, C., Xiao, L., Willumeit-Römer, R. & Hort, N., 24.08.2023, In: Materials Science & Engineering A. 882, 145422.

    Research output: Journal contributionsJournal articlesResearch

  33. Published

    Sensor Fusion for Power Line Sensitive Monitoring and Load State Estimation

    Schimmack, M., Belda, K. & Mercorelli, P., 14.08.2023, In: Sensors. 23, 16, 18 p., 7173.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  34. Published

    Microstructure, mechanical properties and fracture behaviors of large-scale sand-cast Mg-3Y-2Gd-1Nd-0.4Zr alloy

    Yang, L., Huang, Y., Hou, Z., Xiao, L., Xu, Y., Dong, X., Li, F., Kurz, G., Sun, B., Li, Z. & Hort, N., 01.08.2023, In: Journal of Magnesium and Alloys. 11, 8, p. 2763-2775 13 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  35. Published

    Rapid grain refinement and compositional homogenization in a cast binary Cu50Ni alloy achieved by friction stir processing

    Escobar, J., Gwalani, B., Silverstein, J., Ajantiwalay, T., Roach, C., Bergmann, L., dos Santos, J. F., Maawad, E., Klusemann, B. & Devaraj, A., 01.08.2023, In: Materials Characterization. 202, 112999.

    Research output: Journal contributionsJournal articlesResearch

  36. Published

    Semi-stationary shoulder bobbin-tool: A new approach in tailoring macrostructure and mechanical properties of bobbin-tool friction stir welds in magnesium alloy

    Li, G., Chen, T., Fu, B., Shen, J., Bergmann, L., Zhou, L., Chen, K., Santos, J. F. D. & Klusemann, B., 01.08.2023, In: Journal of Materials Processing Technology. 317, 117984.

    Research output: Journal contributionsJournal articlesResearch

  37. Published

    Control of Permanent Magnet Synchronous Motors for Track Applications

    Mercorelli, P., 08.2023, In: Electronics (Switzerland). 12, 15, 20 p., 3285.

    Research output: Journal contributionsScientific review articlesResearch

  38. Published

    Faulty Process Detection Using Machine Learning Techniques

    Dastgerdi, A. K., Lange, D. & Mercorelli, P., 11.07.2023, Congress on Smart Computing Technologies : Proceedings of CSCT 2022. Bansal, J. C., Sharma, H. & Chakravorty, A. (eds.). Springer Singapore, p. 321-333 13 p. (Smart Innovation, Systems and Technologies).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  39. Published

    Fatigue behaviour of multi-spot joints of 2024-T3 aluminium sheets obtained by refill Friction Stir Spot Welding with polysulfide sealant

    Bernardi, M., Suhuddin, U. F. H., Fu, B., Gerber, J. P., Bianchi, M., Ostrovsky, I., Sievers, B., Faes, K., Maawad, E., Lazzeri, L., dos Santos, J. F. & Klusemann, B., 01.07.2023, In: International Journal of Fatigue. 172, 107539.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  40. Published

    Fatigue crack propagation in AA5083 structures additively manufactured via multi-layer friction surfacing

    Kallien, Z., Knothe-Horstmann, C. & Klusemann, B., 01.07.2023, In: Additive Manufacturing Letters. 6, 7 p., 100154.

    Research output: Journal contributionsComments / Debate / ReportsResearch

  41. Published

    Permeability and fabric compaction in forming of fiber metal laminates

    Kruse, M., Poppe, C. T., Henning, F. & Ben Khalifa, N., 07.2023, In: Journal of Composite Materials. 57, 16, p. 2593-2608 16 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  42. Published

    Development of high strength-ductility Mg-Er extruded alloys by micro-alloying with Mn

    Zhou, S., Tang, A., Liu, T., Huang, Y., Peng, P., Zhang, J., Hort, N., Willumeit-Römer, R. & Pan, F., 25.06.2023, In: Journal of Alloys and Compounds. 947, 169669.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  43. Published

    Intelligent Diagnostics of Radial Internal Clearance in Ball Bearings with Machine Learning Methods

    Ambrożkiewicz, B., Syta, A., Georgiadis, A., Gassner, A., Litak, G. & Meier, N., 25.06.2023, In: Sensors. 23, 13, 16 p., 5875.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  44. Published

    Design and characterization of an EOG signal acquisition system based on the programming of saccadic movement routines

    Frem-Sosa, L. A., Valenzuela-Delgado, M., Flores-Fuentes, W., Rodríguez-Quiñonez, J. C., Sergiyenko, O., Hernández-Balbuena, D., Murrieta-Rico, F. N., Miranda-Vega, J. E. & Mercorelli, P., 19.06.2023, 2023 IEEE 32nd International Symposium on Industrial Electronics, ISIE 2023 : Proceedings. Piscataway: Institute of Electrical and Electronics Engineers Inc., p. 1-5 5 p. (IEEE International Symposium on Industrial Electronics; vol. 2023-June).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  45. Published

    Method of Artificial Vision in Guide Cane for Visually Impaired People

    Medina-Madrazo, L. D., Rodríguez-Quiñonez, J. C., Real-Moreno, O., Ortiz-Villaseñor, D., Flores-Fuentes, W., Sergiyenko, O., Castro-Toscano, M. J. & Mercorelli, P., 19.06.2023, 2023 IEEE 32nd International Symposium on Industrial Electronics, ISIE 2023 : Proceedings. Piscataway: Institute of Electrical and Electronics Engineers Inc., 6 p. (IEEE International Symposium on Industrial Electronics; vol. 2023-June).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  46. Published

    Cascade MIMO P-PID Controllers Applied in an Over-actuated Quadrotor Tilt-Rotor

    Dos Santos, M. F., De Mello Honorio, L., Da Silva, M. F., Silva, W. R., De Magalhaes Lima, J. L. S., Mercorelli, P. & Do Carmo, M. J., 12.06.2023, Proceedings of the 2023 24th International Carpathian Control Conference, ICCC 2023. Drotos, D., Benotsmane, R., Varga, A. K., Trohak, A. & Vasarhelyi, J. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 135-140 6 p. (Proceedings of the 2023 24th International Carpathian Control Conference, ICCC 2023).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  47. Published

    Case Study: Optimization of PI Controller Gains with Anti-Windup Applied on a Level System

    De Almeida Machareth, G., Dos Santos, M. F., Da Silva, J. L., Franklin, L. R. & Mercorelli, P., 12.06.2023, Proceedings of the 2023 24th International Carpathian Control Conference, ICCC 2023. Drotos, D., Benotsmane, R., Varga, A. K., Trohak, A. & Vasarhelyi, J. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 4-9 6 p. (Proceedings of the 2023 24th International Carpathian Control Conference, ICCC 2023).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  48. Published

    Design, Modeling and Control of an Over-actuated Hexacopter Tilt-Rotor

    Pimentel, G. O., Dos Santos, M. F., Honorio, L. D. M., Mercorelli, P., Da Silva, M. F. & Moreira, A. P. G. M., 12.06.2023, Proceedings of the 2023 24th International Carpathian Control Conference, ICCC 2023. Drotos, D., Benotsmane, R., Varga, A. K., Trohak, A. & Vasarhelyi, J. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 315-320 6 p. (Proceedings of the 2023 24th International Carpathian Control Conference, ICCC 2023).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  49. Published

    Modelling and Optimization of Commuter Flows as Queuing System Considering Customer and Environmental Costs: a Case Study

    Hering, L. Z., Mercorelli, P., Dos Santos, M. F. & Fernandes, F. M., 12.06.2023, Proceedings of the 2023 24th International Carpathian Control Conference, ICCC 2023. Drotos, D., Benotsmane, R., Varga, A. K., Trohak, A. & Vasarhelyi, J. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 495-500 6 p. (Proceedings of the 2023 24th International Carpathian Control Conference, ICCC 2023).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  50. Published

    rSOESGOPE Method Applied to Four-Tank System Modeling

    Dos Santos Neto, A. F., Dos Santos, M. F., De Mello Honorio, L. & Mercorelli, P., 12.06.2023, Proceedings of the 2023 24th International Carpathian Control Conference, ICCC 2023. Drotos, D., Benotsmane, R., Varga, A. K., Trohak, A. & Vasarhelyi, J. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 141-146 6 p. (Proceedings of the 2023 24th International Carpathian Control Conference, ICCC 2023).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

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