Academic literature on the topic 'Interferometers – Design and construction – Research'

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Journal articles on the topic "Interferometers – Design and construction – Research"

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Shvets, Viacheslav A., Grigory I. Dolgikh, Aleksandr A. Plotnikov, and Sergey V. Yakovenko. "Development and research of a system for monitoring the state of instruments of a laser-interference geophysical complex." Izmeritel`naya Tekhnika, no. 3 (2021): 22–28. http://dx.doi.org/10.32446/0368-1025it.2021-3-22-28.

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This article gives an overview of results achieved in process of design, developing and using of data acquisition and control systems for LSM (long-base strainmeters) and other devices based on Michelson laser interferometer. Such control systems are also used in other types of laser-interference instruments that provide the study of geodynamic processes in a broad frequency range. It’s shown that the effective means for control of external factors in geophysical measurements using LSMs are the same-type laser-interference instruments. The geophysical laser-interference complex is described in this paper as the basis for the construction of interregional space-separated measuring systems. The efficiency of laser-interference meters based on the Michelson interferometer is shown for taking into account the influence of external factors during geophysical measurements using laser strainmeters. A recording system of a strainmeter based on a Michelson interferometer is described, which makes it possible to obtain high sensitivity and record high-frequency oscillations (up to 2 kHz). The advantages of using this control system over the previous versions are noted: the optical scheme of the proposed interferometer contains fewer parts, and the recording system is more reliable and has less power consumption.
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Kurrer, Karl-Eugen. "Steel Construction - Design and Research." Steel Construction 1, no. 1 (September 2008): 2. http://dx.doi.org/10.1002/stco.200890001.

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Chen, Lan Fang, Gang Wu, and Yi Bin Zhang. "Construction Enterprise Supply Chain Design Research." Advanced Materials Research 328-330 (September 2011): 172–75. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.172.

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The introduction of the thought of supply chain management into the construction industry can improve the competitiveness of enterprises. Based on the integration of both the effect of the supply chain as well as supply chain management and the actual situation, this paper analyzed the necessity of the construction and implementation of supply chain management of the construction enterprise. Compared with the supply chain of manufacturing industry, we found it feasible to implement supply chain management in the construction industry and analyzed the obstacles in it. Finally, it pointed out that the clustering of construction materials, information technology, business process reengineering, outsourcing of projects logistics and so on were the basis of constructing supply chain management of the construction enterprise, and accordingly the joint-design supply chain model of the project cost-oriented and the responsiveness-oriented was established.
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이학진 and 최익서. "Community Business Design Model Construction Research." Journal of Korea Intitute of Spatial Design 13, no. 5 (October 2018): 103–18. http://dx.doi.org/10.35216/kisd.2018.13.5.103.

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Kamińska, Aleksandra Maria, and Marcin Strąkowski. "1D portable optical coherence tomography system." Photonics Letters of Poland 10, no. 2 (June 30, 2018): 51. http://dx.doi.org/10.4302/plp.v10i2.823.

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Imaging methods are an expanding branch of technology, which involves data acquisition and analysis of images for research and diagnostics. This paper has been devoted to describe the optical design for one-dimensional, portable optical coherence tomography (OCT) system. The Mach-Zehnder interferometer has been designed in the presented study. Description of the construction and applied hardware solutions have been written. Moreover, a dedicated software tools for signal processing and data acquisition have been developed Full Text: PDF ReferencesStrąkowski, M. R., Pluciński, J., Jędrzejewska-Szczerska, M., Hypszer, R., Maciejewski, M., Kosmowski, B. B., "Polarization sensitive optical coherence tomography for technical materials investigation", Sensors and Actuators A: Physical 142(1), 104-110 (2008). CrossRef J. G. Fujimoto, W. Drexler, Optical Coherence Tomography: Technology and Applications (Biological and Medical Physics, Biomedical Engineering), (New York, Springer 2008). CrossRef Mujat, M., Chan, R. C., Cense, B., Park, B. H., Joo, C., Akkin, T., De Boer, J. F., "Retinal nerve fiber layer thickness map determined from optical coherence tomography images", Opt. Express 13, 9480-9491 (2005). CrossRef Liang, H., Cid, M. G., Cucu, R. G., Dobre, G. M., Podoleanu, A. G., Pedro, J., Saunders, D., "En-face optical coherence tomography-a novel application of non-invasive imaging to art conservation", Opt. Express 13, 6133-6144 (2005). CrossRef Choma, M. A., Sarunic, M. V., Yang, C., Izatt, J. A., "Sensitivity advantage of swept source and Fourier domain optical coherence tomography", Opt. Express 11, 2183-2189 (2003). CrossRef Koyama, T., Marshek, K. M., "Toothed belt drives—past, present and future", Mechanism and machine theory 23(3), 227-241 (1988). CrossRef Ali, M., & Parlapalli, R., "Signal processing overview of optical coherence tomography systems for medical imaging", Texas Instruments, SPRABB9–June (2010). DirectLink B. E. A. Saleh, M. C. Teich, Fundamentals of Photonics, 2nd Edition (New York, Wiley 1991) CrossRef
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Horvath, Adrian, Laszlo Dunai, and Zsolt Nagy. "Dunaujvaros Danube Bridge: Construction, Design and Research." Structural Engineering International 16, no. 1 (February 2006): 31–35. http://dx.doi.org/10.2749/101686606777962710.

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KANEMITSU, Tomomi. "RESEARCH ON STRUCTURAL DESIGN CONSIDERING CONSTRUCTION PROCESS: ANALYSIS OF STRESSES UNDER CONSTRUCTION AND DESIGN TRIAL." AIJ Journal of Technology and Design 13, no. 26 (2007): 579–84. http://dx.doi.org/10.3130/aijt.13.579.

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Jin, Lin, and Tong Zhao. "Network Courses Construction and Research." Advanced Materials Research 482-484 (February 2012): 2253–56. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.2253.

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Network courses construction and research, explained the concept and the content of Network curriculum, the main technical keys of the network course construction, and discusses the methods of using Dreamweaver Web Editor developing network course based on Web platforms. "Digital Electronic Technology" online course design and implementation of an example, introduced the principle of network curriculum design, and the technical Specifications of teaching development.
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Brown, Laura Alexandra, and Manuel Cresciani. "Adaptable design in Olympic construction." International Journal of Building Pathology and Adaptation 35, no. 4 (August 14, 2017): 397–416. http://dx.doi.org/10.1108/ijbpa-12-2016-0030.

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Purpose The Olympic Games is the largest sporting mega event of its type, with deep cultural and historical roots. The event is short lived compared to the lifespan of the infrastructure required in host cities. The purpose of this paper is to examine models of adaptability in Olympic construction, using case studies in previous Olympic host cities of the Summer Olympic Games (Rome 1960, London 2012), to assess the impact of adaptability on future legacy. Design/methodology/approach A mixed methods approach (archival research, direct observation), was used in two case studies: Rome (Palazzetto dello Sport, Palazzo dello Sport), and London (London Olympic Velodrome, London Aquatics Centre). The case studies examined how adaptability was used in design to secure legacy. Findings In the selected case studies (Rome 1960, London 2012), adaptability has had a positive impact on the post-Games use of venues, all four of which remain in use today. However, there are multiple factors that contribute to post-Games legacy, and further research is necessary. Research limitations/implications Whilst some positive results were observed in this study, more research is necessary across a broader spectrum of sites and venues to make conclusive recommendations for architects designing for Mega Sporting events. Social implications The significance of this study to architectural practice, academia, and society is its potential to benefit future Olympic Games, International Olympic Committee policy, and be extended to other Mega Sporting events. Originality/value The originality of this research lies within its analysis of Olympic infrastructures and sustainability, of which there is a current lack of comparative studies in academic research.
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Monteiro, Beany. "The construction of autonomous knowledge in design research." Strategic Design Research Journal 2, no. 3 (December 23, 2009): 88–91. http://dx.doi.org/10.4013/sdrj.2009.23.02.

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Dissertations / Theses on the topic "Interferometers – Design and construction – Research"

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Ramchander, Rajesh. "Quadrature-point stabilization of Mach-Zehnder interferometers." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/41594.

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Optical fiber magnetometers are extremely sensitive devices which are capable of competing with magnetometers implemented using other technologies. Demodulation of the signals detected using these magnetometers can be performed using either homodyne or heterodyne techniques. Higher sensitivities have been achieved using homodyne rather than heterodyne techniques, but with homodyne demodulation there exists the inherent problem of quadrature-point stabilization. Presented here is a review of existing quadrature-point stabilization methods and experimental results concerning the application of one of them which uses a piezoelectric transducer in the reference arm of an all-fiber Mach-Zehnder interferometer.
Master of Science
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Kumar, Nishith. "Design and construction of a novel thermal interferometer." Swinburne Research Bank, 2009. http://hdl.handle.net/1959.3/64905.

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Dawkins, Samuel T. "Sapphire room temperature optical frequency reference : design, construction and application." University of Western Australia. School of Physics, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0200.

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A pair of high-stability optical frequency references has been developed. The devices are based on room temperature Fabry-Perot cavities with mirrors spaced apart by a hollow single-crystal sapphire element. The sapphire element delivers mechanical sti ness that provides improved immunity to vibrational perturbations compared with the more common spacers made from ultra-low expansion glass. The system is housed in an vacuum chamber designed to provide isolation from environmental perturbations through the use of an active thermal control system, suspension legs and a unique beam alignment system. The dimensional stability of the Fabry-Perot was translated into a highly stable laser frequency by frequency locking a 1064nm Nd:YAG laser to the centre of a mode of the cavity. This frequency lock was implemented by the Pound-Drever-Hall scheme. By careful design, this control system was able to hold the frequency of the laser to within parts in 1016 of the frequency of the fundamental cavity mode. The minimum fractional frequency stability of the laser frequency was measured at 2.1x10[-]14 for integration times of 0.8 s, limited by the residual instability of the Fabry-Perot cavity. The experimental methods used to measure the performance of the system have also been considered in depth. For example, the most common way of characterizing the frequency stability of a frequency standard is the Allan variance. It is demonstrated that, without care, data taken with modern frequency counters can produce erroneous and distorted results when their output is supplied to this algorithm. The method to avoid or account for these errors is also presented. The Fabry-Perot cavity performance is limited on long timescales by residual temperature uctuations, which can be ameliorated in future by enhancing the design of the thermal control system. At short timescales, the system is limited by vibration-induced uctuations together with a white noise source, that is yet to be identi ed, but may relate to fundamental thermodynamic temperature uctuations of the sapphire spacer. This system was used to measure the stability of an optical signal synthesised from a cryogenic microwave sapphire oscillator using an wide-band optical frequency comb. This was the rst demonstration of a multiplication of an ultra-stable signal from the microwave frequency domain into the optical frequency domain, without loss of delity at the level of 2x10[-]14.
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Ghalandar, Zehi Jalalabad Toomaj. "Design Quality in Architecture and Construction Research." Thesis, KTH, Fastigheter och byggande, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254838.

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The issue of design quality in construction projects has long been a major concern for designprofessionals (Gann et al. 2003). The emphasis on improvement of processes in constructionin order to manage or reduce “cost, time and waste” in projects, at times has led to concernsthat the design of a building could become a matter of less importance due to such processimproving measures (Gann et al. 2003, p.319) “Design Quality” in architecture andconstruction is an ambiguous and “dynamic concept” in relation to its context, continuouslygoing through changes (Rönn 2010, p.48; Slaughter 2004).Quality itself is related to value and multiple definitions of it (Rönn 2010). It is often possiblefor both people and professionals to feel and experience design quality in buildings ratherintuitively, but to frame it in a recognizable manner has always proved challenging (Rönn2010). Essentially, human behavior apart from being influenced by the physical environmentis also influenced by the social context existing within the physical environment (Vischer2008).These challenges further extend to judgement, assessment and measurement of design quality,and setting out the relevant criteria for them (Rönn 2010, Slaughter 2004). Therefore, it’sdifficult for building designers, to structure design solutions that could guarantee theachievement of such ambiguous concept (Rönn 2010).
Frågan om designkvalitet i byggprojekt har länge varit ett stort bekymmer för designers (Gannet al. 2003). Betoningen på förbättring av processer inom konstruktion för att hantera ellerminska ”kostnad, tid och slöseri” i projekt har ibland lett till en oro för att utformning ochdesign av en byggnad kan bli av mindre betydelse på grund av sådana processförbättrandeåtgärder (Gann et al. 2003, p.319) ”Designkvalité” i arkitektur och konstruktion är ett tvetydigtoch ”dynamiskt koncept” i förhållande till sitt sammanhang, som ständigt genomgårförändringar (Rönn 2010, s.48; Slaughter 2004).Kvalité i sig är relaterad till värde och flera definitioner av det (Rönn 2010). Det är ofta möjligtför både människor och yrkesverksamma att känna och uppleva designkvalité i byggnaderganska intuitivt, men att rama in den på ett igenkännbart sätt har visat sig utmanande (Rönn2010). I huvudsak påverkas det mänskliga beteendet utöver den fysiska miljön även av densociala kontexten som finns inom den fysiska miljön (Vischer 2008).Dessa utmaningar sträcker sig vidare till bedömning, värdering och mätning av designkvalitéeroch fastställande av relevanta kriterier för dem (Rönn 2010, Slaughter 2004). Därför är detsvårt för byggnadsdesigners att konstruera designlösningar som garanterat kan uppnå ett sådanttvetydigt koncept (Rönn 2010).
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Au, Siu-man Michael. "Construction IT Centre." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25945932.

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Brown, Robert Stephen. "Sustainable design and construction strategies for research building typologies." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000850.

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Ellwood, Jeffrey L. "Design and construction of a composite airframe for UAV research." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA232422.

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Thesis (M.S. in Aeronautical Engineering)--Naval Postgraduate School, June 1990.
Thesis Advisor(s): Howard, Richard M. Second Reader: Lindsey, Gerald H. "June 1990." Description based on signature page as viewed on October 21, 2009. DTIC Identifier(s): Composite materials, ducted fan, airframes, vertical takeoff aircraft, remotely piloted vehicles. Author(s) subject terms: UAV, composites, AROD, TDF, RPV, ducted fan, vertical takeoff. Includes bibliographical references (p. 74-75). Also available online.
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Meunier, Véronique Marcelle. "Development of a mesoscale radiometer for weather research." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116071.

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A new microwave radiometer, the Mesoradiometer, was constructed and the meteorological information contained in its data were examined. This instrument is designed to measure the distribution of water vapor and liquid water in the atmosphere.
The Mesoradiometer uses 32 channels located on both sides of the 22.235 GHz water vapor absorption peak, as well as a narrow beam width antenna, and a pedestal giving the instrument the capacity to scan the atmosphere in order to detect water vapor. During the characterization of the instrument, a problem in maintaining the stability of the instrument's temperature was detected.
Even with this problem, the Mesoradiometer successfully measured atmospheric water vapor and liquid water. The instrument was capable of tracking the movements of clouds. This is possible thanks to its rapid scanning strategy, such tracking being impossible with traditional radiometers.
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Duraski, Robert F. (Robert Franklin). "Design and construction of the versatile toroidal facility for ionospheric chamber research." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/97783.

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Machaalani, Roland Department of Industrial Design UNSW. "The research and design of a two-seater lounge." Awarded by:University of New South Wales. Department of Industrial Design, 2001. http://handle.unsw.edu.au/1959.4/19328.

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To document the design, prototype and manufacture of a lounge, which stimulates communication and human interaction. The lounge will also question conventional seating arrangements, and redefine how two people can sit in relation to each other, converse, interact and exchange body language. The process began with an initial design sketch, and producing a prototype. This step was required, as it was the starting point for the major project. It provided me with an initial design to criticize and improve on. The major project is intended to test the validity of the initial design, analyse the markets, and improve the design in relation to ergonomic issues, material/manufacturing resolution and produce a marketing plan. The next stage of the process was the gathering and analysis of relevant information in order to redefine the design brief. This involved preliminary research into marketing, ergonomics, materials and manufacturing processes. With the design brief now established, concepts were prepared and compared against the products criteria. The design solution which best met the criteria was further detailed and developed. Finally, a business plan was put together to test the commercial viability of the lounge. The business plan was comprised of the viable markets, production cost, investment cost, discounted cash flow, and sensitivity analysis.
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Books on the topic "Interferometers – Design and construction – Research"

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Sustainable design of research laboratories: Planning, design, and operation. Hoboken, N.J: John Wiley & Sons, 2010.

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Building type basics for research laboratories. 2nd ed. Hoboken, N.J: Wiley, 2008.

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Design and planning of research and clinical laboratory facilities. New York: J. Wiley, 1995.

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Design with knowledge: New research in sustainable building. Copenhagen: Henning Larsen Architects, 2012.

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Duangratana, Songsawasdi. Research associated with foundation improvement for road construction on soft Bangkok clay. Bangkok: Dept. of Highways, Ministry of Transport and Communications, 1993.

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Janssen, Donald J. PCC mix design: Final report, Research Project GC8286, Task 1, PCC Mix Design. [Olympia, Wash.?]: Washington State Dept. of Transportation, Planning, Research and Public Transportation Division, in cooperation with the U.S. Dept. of Transportation, Federal Highway Administration, 1989.

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International, Specialty Conference on Cold-Formed Steel Structures (8th 1986 St Louis Mo ). Recent research and developments in cold-formed steel design and construction. [Rolla, Mo.]: Department of Civil Engineering, University of Missouri-Rolla, 1986.

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Dow, Marvin B. The ACEE program and basic composites research at Langley Research Center (1975 to 1986): Summary and bibliography. Washington, D.C: National Aeronautics and Space Administration, Scientific and Technical Information Office, 1987.

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Fitzpatrick, Kay. Recent geometric design research for improved safety and operations. Washington, D.C: National Academy Press, 2001.

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Oregon Health and Science University. Oregon Health and Science University: Biomedical research building construction audit. Salem, OR: Secretary of State, Audits Division, 2007.

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Book chapters on the topic "Interferometers – Design and construction – Research"

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Yan, Fengmin. "Research Design." In Image, Reality and Media Construction, 65–82. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9076-1_4.

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Baard, Vicki C., and John Dumay. "Intervention Design and Construction." In Interventionist Research in Accounting, 212–29. New York : Routledge, 2020. | Series: Routledge studies in accounting: Routledge, 2020. http://dx.doi.org/10.4324/9781351262644-14.

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Ong, Joy, and Low Sui Pheng. "Research Design and Methodology." In Waste Reduction in Precast Construction, 89–97. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8799-3_6.

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Pheng, Low Sui, and Lau Shing Hou. "Research Design and Methodology." In Construction Quality and the Economy, 89–111. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-5847-0_7.

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Sui Pheng, Low, and Benjamin K. Q. Chua. "Research Design and Methodology." In Work-Life Balance in Construction, 45–67. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1918-1_5.

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Peh, Lu Chang, and Sui Pheng Low. "Research Design and Methodology." In Organization Design for International Construction Business, 133–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-35164-8_7.

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Lago-Novás, J. "Stop Designing Architecture, Design Your Practice!" In Construction and Building Research, 3–9. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7790-3_1.

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Sui Pheng, Low, and Sim Jia Zheng. "Research Design and Methodology." In Construction Productivity in the Multilayer Subcontracting System, 57–68. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1831-3_5.

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Pérez-García, A., F. Gómez-Martínez, A. Alonso, V. Hernández, J. M. Alonso, P. de la Fuente, and P. Lozano. "Architrave: Advanced Analysis of Building Structures Integrated in Computer-Aided Design." In Construction and Building Research, 123–30. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7790-3_17.

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Ofori, George, and Shamas-ur-Rehman Toor. "Research design and the grounded theory approach." In Leadership in the Construction Industry, 77–105. First edition. | Abingdon, Oxon ; New York : Routledge/Taylor & Francis Group, 2021.: Routledge, 2021. http://dx.doi.org/10.4324/9781003038757-5.

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Conference papers on the topic "Interferometers – Design and construction – Research"

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Nemechek, John J. "Design and construction of large-aperture reflective interferometers." In SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, edited by Robert E. Fischer and Warren J. Smith. SPIE, 1993. http://dx.doi.org/10.1117/12.163635.

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Gransberg, Douglas D., and Keith R. Molenaar. "Life Cycle Design Criteria for Design-Build Transportation Projects." In Construction Research Congress 2003. Reston, VA: American Society of Civil Engineers, 2003. http://dx.doi.org/10.1061/40671(2003)86.

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Meng Zhang. "Digital construction—construction research in virtual space." In Conceptual Design (CAID/CD). IEEE, 2008. http://dx.doi.org/10.1109/caidcd.2008.4730652.

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Shrestha, Pramen P., and Nirajan Mani. "Impact of Design Cost on Design Bid Build Project Performance." In Construction Research Congress 2012. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412329.158.

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Kalach, Mayssa, Issam Srour, and Mohamed-Asem Abdul-Malak. "Envisioned Roles of BIM for Design Delivery under Design-Build Projects." In Construction Research Congress 2018. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481264.054.

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Chan, Edwin H. W., Albert P. C. Chan, and Ann T. W. Yu. "Design Management in Design and Build Projects: The New Role of the Contractor." In Construction Research Congress 2005. Reston, VA: American Society of Civil Engineers, 2005. http://dx.doi.org/10.1061/40754(183)81.

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Pishdad-Bozorgi, Pardis, and Jesus M. de la Garza. "Comparative Analysis of Design-Bid-Build and Design-Build from the Standpoint of Claims." In Construction Research Congress 2012. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412329.003.

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Collins, Wesley, Jeffrey Kim, J. Mark Taylor, Justin Miller, and Jess Donnerberg. "Co-Location during Design and Construction of Design-Build Projects: The General Contractor’s Perspective." In Construction Research Congress 2020. Reston, VA: American Society of Civil Engineers, 2020. http://dx.doi.org/10.1061/9780784482889.127.

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Magent, Chris S., David R. Riley, and Michael J. Horman. "High Performance Building Design Process Model." In Construction Research Congress 2005. Reston, VA: American Society of Civil Engineers, 2005. http://dx.doi.org/10.1061/40754(183)80.

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Nassar, Khaled M., Mohamed Y. Hegab, and Nicholas W. Jack. "Design Cost Analysis of Transportation Projects." In Construction Research Congress 2005. Reston, VA: American Society of Civil Engineers, 2005. http://dx.doi.org/10.1061/40754(183)93.

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Reports on the topic "Interferometers – Design and construction – Research"

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Chaffin, C. T., and T. L. Marshall. Design, Construction, and Performance of a Plume Generator for Remote Sensing Research. Fort Belvoir, VA: Defense Technical Information Center, April 1998. http://dx.doi.org/10.21236/ada353374.

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Schoenmackers, R. Design and construction of the NMSU Geothermally Heated Greenhouse Research Facility: Final technical report. Office of Scientific and Technical Information (OSTI), November 1988. http://dx.doi.org/10.2172/6900753.

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Placido, Andrew, Kunlei Liu, Don Challman, Rodney Andrews, and David Jacques. Design and construction of coal/biomass to liquids (CBTL) process development unit (PDU) at the University of Kentucky Center for Applied Energy Research (CAER). Office of Scientific and Technical Information (OSTI), October 2015. http://dx.doi.org/10.2172/1234435.

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Herrin, Eugene, Paul Golden, and Herbert Robertson. Design, Evaluation, and Construction of TEXESS and LUXESS and Research in Mini-Array Technology and Use of Data From Single Stations and Sparse Networks: Phase 5. Fort Belvoir, VA: Defense Technical Information Center, October 1995. http://dx.doi.org/10.21236/ada306407.

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Haddock, John E., Reyhaneh Rahbar-Rastegar, M. Reza Pouranian, Miguel Montoya, and Harsh Patel. Implementing the Superpave 5 Asphalt Mixture Design Method in Indiana. Purdue University, 2020. http://dx.doi.org/10.5703/1288284317127.

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Recent research developments have indicated that asphalt mixture durability and pavement life can be increased by modifying the Superpave asphalt mixture design method to achieve an in-place density of 95%, approximately 2% higher than the density requirements of conventionally designed Superpave mixtures. Doing so requires increasing the design air voids content to 5% and making changes to the mixture aggregate gradation so that effective binder content is not lowered. After successful laboratory testing of this modified mixture design method, known as Superpave 5, two controlled field trials and one full scale demonstration project, the Indiana Department of Transportation (INDOT) let 12 trial projects across the six INDOT districts based on the design method. The Purdue University research team was tasked with observing the implementation of the Superpave 5 mixture design method, documenting the construction and completing an in-depth analysis of the quality control and quality assurance (QC/QA) data obtained from the projects. QC and QA data for each construction project were examined using various statistical metrics to determine construction performance with respect to INDOT Superpave 5 specifications. The data indicate that, on average, the contractors achieved 5% laboratory air voids, which coincides with the Superpave 5 recommendation of 5%. However, on average, the as-constructed mat density of 93.8% is roughly 1% less than the INDOT Superpave 5 specification. It is recommended that INDOT monitor performance of the Superpave 5 mixtures and implement some type of additional training for contractor personnel, in order to help them increase their understanding of Superpave 5 concepts and how best to implement the design method in their operation.
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Bjella, Kevin, Yuri Shur, Misha Kanevskiy, Paul Duvoy, Bruno Grunau, John Best, Stephen Bourne, and Rosa Affleck. Improving design methodologies and assessment tools for building on permafrost in a warming climate. Engineer Research and Development Center (U.S.), November 2020. http://dx.doi.org/10.21079/11681/38879.

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The U.S. Department of Defense (DoD) operates numerous Arctic and Subarctic installations, including Alaska. Changes to permafrost can threaten critical built infrastructure. It is critical to accurately characterize and compare site conditions in permafrost regions to enable the efficient, cost-effective design and construction of an infrastructure well suited to the permafrost environment and that meets DoD requirements. This report describes three research efforts to establish (1) field investigation approaches for ground ice detection and delineation, (2) methods and modeling for early warning detection of thawing permafrost under infrastructure, and (3) an outline of a decision support system that determines the most applicable foundation design for warming and degrading permafrost. Outcomes of these interrelated efforts address needs to improve construction of DoD mission critical infrastructure on Arctic and Subarctic permafrost terrains. Field investigation processes used systematic methodologies including borehole data and geophysical measurements to effectively characterize subsurface permafrost information. The Permafrost Foundation Decision Support System (PFFDSS) tool implements and logically links field survey information and foundation type assessments. The current version of PFFDSS is designed to be accessible to design-engineers of a broad range of experience, that will reduce the effort and cost, and improve the effectiveness of site assessment.
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Qamhia, Issam, and Erol Tutumluer. Evaluation of Geosynthetics Use in Pavement Foundation Layers and Their Effects on Design Methods. Illinois Center for Transportation, August 2021. http://dx.doi.org/10.36501/0197-9191/21-025.

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This report presents findings of a research effort aimed at reviewing and updating existing Illinois Department of Transportation (IDOT) specifications and manuals regarding the use of geosynthetic materials in pavements. The project consisted of three tasks: evaluate current IDOT practice related to the use of geosynthetics; review research and state of the practice on geosynthetics applications, available products, design methods, and specifications; and propose recommendations for geosynthetic solutions in pavements to modernize IDOT’s practices and manuals. The review of IDOT specifications revealed that geotextiles are the most used geosynthetic product in Illinois, followed by geogrids. Several of IDOT’s manuals have comprehensive guidelines to properly design and construct pavements with geosynthetics, but several knowledge gaps and potential areas for modernization and adoption of new specifications still exist. Based on the review of the available design methods and the most relevant geosynthetic properties and characterization methods linked to field performance, several updates to IDOT’s practice were proposed. Areas of improvement are listed as follows. First, establish proper mechanisms for using geogrids, geocells, and geotextiles in subgrade restraint and base stabilization applications. This includes using shear wave transducers, i.e., bender elements, to quantify local stiffness enhancements and adopting the Giroud and Han design method for subgrade restraint applications. Second, update IDOT’s Subgrade Stability Manual to include property requirements for geogrids, geotextiles, and geocells suitable for subgrade restraint applications. Third, establish proper standards on stabilization, separation, and pumping resistance for geotextiles by incorporating recent research findings on geotextile clogging and permeability criteria. Fourth, promote the use of modern geosynthetic products, such as geotextiles with enhanced lateral drainage, and fifth, elaborate on proper methods for construction/quality control measures for pavements with geosynthetics.
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Becker, Peter J. Using the Light Weight Deflectometer for Performance-Based Quality Assurance Testing of Cement Modified Subgrades. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317304.

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This report documents the findings from SPR-4230 (Alternative Quality Assurance Methods for Compacted Subgrade). The main objective of SPR-4230 involved establishing performance-related quality assurance (QA) test methods for pavement subgrade construction. Because INDOT generally prefers specifying subgrade treatment type IBC (i.e., 14-in. cement modified subgrade), this study focused on performance-based QA test methods for constructing cement modified subgrade. Moreover, INDOT prefers using light weight deflectometer (LWD) for chemically modified subgrade construction acceptance, so this study aimed to use LWD deflection measurements as performance-related construction acceptance criteria. A laboratory study was performed to relate LWD deflections with resilient modulus that is the key subgrade performance-related parameter in pavement design. In addition, LWD deflections were related with unconfined compressive strength increase that is the key parameter in chemical soil modification mix design. A rigorous field study consisting of LWD testing and falling weight deflectometer (FWD) testing at INDOT new pavement construction sites was conducted to verify the laboratory developed relationship. Recommendations for implementing results of this study into cement modified subgrade construction acceptance is provided, as are recommendations for future research.
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Roesler, Jeffery, Sachindra Dahal, Dan Zollinger, and W. Jason Weiss. Summary Findings of Re-engineered Continuously Reinforced Concrete Pavement: Volume 1. Illinois Center for Transportation, May 2021. http://dx.doi.org/10.36501/0197-9191/21-011.

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This research project conducted laboratory testing on the design and impact of internal curing on concrete paving mixtures with supplementary cementitious materials and evaluated field test sections for the performance of crack properties and CRCP structure under environmental and FWD loading. Three experimental CRCP sections on Illinois Route 390 near Itasca, IL and two continuously reinforced concrete beams at UIUC ATREL test facilities were constructed and monitored. Erodibility testing was performed on foundation materials to determine the likelihood of certain combinations of materials as suitable base/subbase layers. A new post-tensioning system for CRCP was also evaluated for increased performance and cost-effectiveness. This report volume summarizes the three year research effort evaluating design, material, and construction features that have the potential for reducing the initial cost of CRCP without compromising its long-term performance.
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Piercy, Candice, Safra Altman, Todd Swannack, Carra Carrillo, Emily Russ, and John Winkelman. Expert elicitation workshop for planning wetland and reef natural and nature-based features (NNBF) futures. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41665.

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This special report discusses the outcomes of a September 2019 workshop intended to identify barriers to the consideration and implementation of natural and nature-based features (NNBF) in US Army Corps of Engineers (USACE) civil works projects. A total of 23 participants representing seven USACE districts, the US Army Engineer Research and Development Center (ERDC), and the University of California–Santa Cruz met at USACE’s South Atlantic Division Headquarters in Atlanta, Georgia, to discuss how to facilitate the implementation of NNBF into USACE project planning for wetlands and reefs using six categories: (1) site characterization, (2) engineering and design analysis, (3) life-cycle analysis, (4) economic analysis, (5) construction analysis, (6) and operation and maintenance (and monitoring). The workshop identified seven future directions in wetland and reef NNBF research and development: • Synthesize existing literature and analysis of existing projects to better define failure modes. • Determine trigger points that lead to loss of feature function. • Identify performance factors with respect to coastal storm risk management (CSRM) performance as well as ecological performance. • Focus additional research into cobenefits of NNBF. • Quantify the economic life-cycle costs of a project. • Improve technology transfer with regards to NNBF research and topics.
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