Relevant bibliographies by topics / Pipe work

Academic literature on the topic 'Pipe work'

Author: Grafiati
Published: 10 December 2022
Last updated: 19 February 2023

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Journal articles on the topic "Pipe work"

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Schulkes, R. M. S. M., Trygve Rinde, and Ole Harald Utvik. "Pipe Flow With Radial Inflow: Experimental and Modeling Work." Journal of Fluids Engineering 121, no. 1 (March 1, 1999): 106–11. http://dx.doi.org/10.1115/1.2821989.

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In this paper results are presented from experiments in which the pressure loss in single-phase pipe flow is studied when radial inflow occurs. Experiments have been carried out with pipes which have different perforation geometries so as to be able to investigate the effect of perforation geometry on the pressure loss. Data analysis of these experiments, as well as analysis of experiments carried out by other groups, yields a pressure loss model which accurately describes pressure losses in single-phase pipe flow with radial inflow through perforations in the pipe wall. The experimental data is subsequently used to establish a numerical value of a parameter which is used in a model description. This leads to the formulation of an effective friction factor for pipe flow with radial inflow.
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Park, Soo, Hui Hwan Kwon, Jae Mean Koo, Chang Sung Seok, Du Han Jung, and Jin Yong Mo. "A Study on the Fatigue Life Prediction for Bending Pipe." Advanced Materials Research 415-417 (December 2011): 2219–25. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.2219.

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Mechanical structures with power sources experience repeated force produced by motors. As a result, the life of the pipes reduces and ultimately, the pipes collapse. In most cases, the U-shape pipe is made from a straight pipe by complicated bending work. During this work process, plastic deformation of the pipe produces residual stress in the pipe. The residual stress significantly affects the fracture behavior of the pipe. In this paper, fatigues tests of U-shape bending pipe are performed by uniaxial testing machine and residual stresses were evaluated by FEM analysis. So we established the relation between residual stress and fatigue life. And we suggested new equation for fatigue life prediction using the residual stress of U-shape bending pipe.
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Han, Jae-Hyun, Dong-Jun Yeom, Jun-Sang Kim, and Young Suk Kim. "Life Cycle Cost Analysis of the Steel Pipe Pile Head Cutting Robot." Sustainability 12, no. 10 (May 12, 2020): 3975. http://dx.doi.org/10.3390/su12103975.

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Steel pipe pile head cutting work is performed to adjust the horizontal levels of piles, and it is essential for the stable transfer of an upper structure load to the ground. However, the field survey results show that steel pipe pile head cutting process is highly dangerous as laborers especially deal with gas and plasma cutting machines. Moreover, the laborers are exposed to continuous risks because the piles are frequently felled, lifted, moved, and loaded using construction equipment, such as excavators, immediately after the piles are cut. Recently, the authors of this study developed a prototype of a steel pipe pile head cutting robot and verified its performance through laboratory experiments to improve work safety, productivity, and the quality of steel pipe pile head cutting work. The purpose of this study is to secure the economic feasibility of robot development and verify the sustainable utilization of a developed robot by analyzing the comprehensive performance and economic efficiency throughout the life cycle of a steel pipe pile head cutting robot developed in South Korea. In this study, sensitivity analysis was also performed on the variables expected to have a significant influence or variables that must be considered for the future commercialization of the developed robot. When the developed robot is applied to construction sites in the future, its ripple effects will be significant because it will be possible to prevent labor safety accidents, improve work productivity, secure uniform quality, and reduce input costs.
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Liu, Chun Yuan, Meng Xuan Zhao, and Yu Liu. "Reliability Analysis of the Vertical Bearing Capacity of Prestressed Pipe Pile Foundations." Advanced Materials Research 671-674 (March 2013): 90–93. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.90.

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The paper introduces the basic principles of vertical bearing capacity of the pile by using static load test, establish the random site theory model of the bearing capacity of prestressed pipe pile foundations calculation, calculates and statistics the try count ratio of vertical bearing capacity of 144 prestressed pipe pile in Tianjin, work out calculation procedures of JC method, calculate reliability index of vertical bearing capacity and analyze calculation results. In the last, we build a model using the finite element software, analysis the displacement of pile top under earthquake, evaluates the horizontal bearing capacity of prestressed pipe pile.
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Mekcem, Maroua. "Nanofluids and heat pipe limitations." Academic Perspective Procedia 1, no. 1 (November 9, 2018): 298–304. http://dx.doi.org/10.33793/acperpro.01.01.58.

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Given the high efficiency of heat pipes as heat transfer devices, which work with phase changing principle (evaporation and condensation) and without requiring any external energy input, the heat pipes have been utilized for many years in several areas. However, heat transfer in heat pipes is limited by physical phenomena which appear during its operation, called heat pipe limitations; these can limit and reduce its performance. At this state, the use of nanofluids instead of conventional fluids come a solution after that Choi and Eastman (1995) confirmed the feasibility of enhancing the thermal conductivity of fluids by adding nanoparticles. This paper represents a general description of heat pipes, including a brief historical perspective, principle of operation and explanation of main heat transfer limitations. The work shows the contribution of nanofluids in pushing back the heat pipe limitations.
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Bond, Natalie, and Linda Gemmell. "Experiences of prison officers on a Lifer Psychologically Informed Planned Environment." Therapeutic Communities: The International Journal of Therapeutic Communities 35, no. 3 (September 2, 2014): 84–94. http://dx.doi.org/10.1108/tc-03-2014-0010.

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Purpose – Psychologically Informed Planned Environments (PIPEs) provide a pathway facility for offenders with complex needs, such as personality disorder; to maintain and develop the progress made on offending behaviour programmes (Ministry of Justice and Department of Health, 2012). The purpose of this paper is to explore the experiences of prison officers who work on a PIPE in a Lifer prison. Design/methodology/approach – Interpretative Phenomenological Analysis was used to explore the experiences of five prison officers working on a PIPE in a Lifer prison. Findings – Main themes identified were labelled “Role Conflict”, “Growth”, “Relationships” and “Impact”. A rich and detailed account of the experience of the “voyage of discovery” and the personal challenges, costs and rewards of the PIPE work was achieved. Research limitations/implications – Limitations include the small number of participants, limited focus of the researchers, both Forensic Psychologists, and the uniqueness of the context, a Lifer prison. Limitations might be addressed by future research that could expand on the current findings. Implications for future research include further exploration of the psychological impact of the work, dynamics within the PIPE and the value of attachment theory in work with personality disordered offenders. Implications for future policy and practice concern training, support and the development of new PIPEs. Originality/value – The research adds a rich account of what it is like for these prison officers to work on a PIPE in a Lifer prison. The experiences shared reveal the personal challenge, costs and rewards of the work through which ideas to develop the staff, residents and the PIPE model emerged.
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Rajole, S., P. R. Sondar, S. Hiremath, and K. S. Ravishankar. "Failure Analysis of Industrial Discharge Hopper Pipe." Journal of Modern Manufacturing Systems and Technology 5, no. 1 (November 16, 2020): 1–6. http://dx.doi.org/10.15282/jmmst.v5i1.5149.

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This work presents the detailed investigation and root cause analysis of catastrophic failure of an industrial discharge hopper pipe. The hopper pipe investigated in the present work is made of austenitic stainless steel, 316 grade, a commonly used grade for valves, pipes and heat exchanger tubes. The pipe fractured in transverse direction, leading to the failure of discharge pipe. Visual inspection, dye penetrant test, chemical analysis, microstructural analysis, and fractography analysis were carried out on the failed part and it was concluded that stress corrosion cracking led to the failure of hopper pipe. The pipe constantly being under the exposure of industrial water and the presence of chlorine content in it made it susceptible for stress corrosion cracking. Transgranular fracture was clearly observed in the microstructure of failed sample and spot EDX at the fracture location confirmed the presence of chlorine content. Further, fractography showed striations indicating fatigue loading. The work concluded that stress corrosion cracking as the root cause of failure.
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Zakarlyukin, S. I., and G. I. Koval’. "Pipes production by hot reducing at SKK-14 radial-forging machine." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 2 (March 10, 2019): 242–46. http://dx.doi.org/10.32339/0135-5910-2019-2-242-246.

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At small-capacity production of pipes a process of pipes reducing at radial-forging machines can be effective for expanding of pipes assortment by diameter and wall thickness. Results of pilot work on hot reducing at radial-forging machine SKK14 of pipes, made of corrosion-resistant steels 12Х18Н10Т and 10Х23Н18. Based on analyses of known recommendations on pipes forming during reducing by longitudinal rolling at reducing mills, as well as at radial-forging and rotary-forging machines, it was recommended to use a known dependence Sр = S0/[1 – 0,0044(D0 – Dр)], usually applied for pipes rolling conditions at reducing mills, for predicting of reduced pipe wall thickening. To determine the pipes internal surface quality, a hot reducing of pipes made of 12Х18Н10Т steel was accomplished using different technological routes and taking into consideration a possibility of forming folds and laps on the surface. It was established that longitudinal folds (wrinkles) are not formed on the pipe internal surface at the pipe outer diameter decreasing by less than 30%, while the longitudinal folds (wrinkles) are formed at decreasing of the pipe outer diameter by more than 45%. Forging folds can be formed on the pipe internal surface at pipe outer diameter decreasing by more than 60%.
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GOGOLEV, G. V. "OPTION OF HEAT PIPES FOR COOLING OF MOLDS DURING INJECTION MOLDING PLASTICS." Fundamental and Applied Problems of Engineering and Technology 3 (2021): 57–62. http://dx.doi.org/10.33979/2073-7408-2021-347-3-57-62.

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In the article analyzed possibility using of heat pipes and two–phase thermal siphons in production plastic injection molding and die casting of zinc alloys. The advantages of heat pipes make it possible to use them to remove heat from hard–to–reach place of casting molds. Results of the comparative analyses of the work of various heat pipes are presented. The experimental researches were in the real temperature range of work carried out. The article gives recommendations on the option of capillary–porous structures and working fluids of heat pipes. The arterial heat pipe design proposed. The optimal geometric characteristics of mesh porous structure of this heat pipe are determined.
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KIM, SANG-YOUNG, JAE-MEAN KOO, and CHANG-SUNG SEOK. "EVALUATION OF RESIDUAL STRESS OF COPPER PIPE BY USING RAMAN SPECTROSCOPY." Modern Physics Letters B 22, no. 11 (May 10, 2008): 1007–12. http://dx.doi.org/10.1142/s0217984908015759.

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In most cases, a straight pipe is used after complicated bending work in a mechanical system. In this work process, the plastic deformation of the pipe produces residual stress in the pipe. This residual stress significantly affects the behavior of pipe fracture. For this reason, residual stress must be evaluated. Measuring the residual stress of a U-shaped copper pipe is difficult with existing destructive and nondestructive measurement methods. In this paper, the residual stress of a U-shaped copper pipe (99.9% pure copper) was evaluated from the Raman shift by Raman spectroscopy and FEM analysis. Also, the results of the bending test by FEM analysis and experiments are compared. The analyzed results of Raman spectra had a similar tendency with the results of the FEM analysis in regard to the residual stress distributions in the U-shaped pipes. Also, the results of the bending tests were shown resemblance.
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Dissertations / Theses on the topic "Pipe work"

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Finlay, Jamie P. "Numerical methods for the stress analysis of pipe-work junctions." Thesis, Liverpool John Moores University, 2004. http://researchonline.ljmu.ac.uk/5632/.

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Pipe junctions arc a regular feature of piping and pressure vessel systems and are often the subject of multiple loads. acting simultaneously and at irregular intervals. Due to the nature and complexity of the loading. the subject has received a significant amount of study from designers and stress analysts to resolve some of the difficulties in stressing pressure structures. An extensive finite element (FE) analysis was carried out on 92 reinforced buttwelded pipe junctions manufactured by the collaborating company. Spromak Ltd. After comparing the resulting effective stress factor (ESF) data with ESFs for un-reinforced fahricated tee (UFT) it was concluded that, for the majority of loads, reinforced branch outlets appear better able to contain stresses than their un-reinforced counterparts. The linear FE study was followed by the inelastic analysis of three reinforced branch junctions. The purpose of the research was to investigate the potential use of such analysis as a tool for estimating the bursting pressure of pipe junctions and satisfying customer requirement for proof of a products performance under internal pressure. Results obtained showed that small displacement analysis is unsuitable for estimating the bursting pressure of a pipe junction, whilst the large displacement results were similar to those obtained using a hand-calculation. Ultimately, the study concluded that inelastic analysis was too expensive, offering little by way of insight into the problem than could be found by using classical stress analysis techniques. Following on from the study of reinforced branch outlets, this thesis described work undertaken with British Energy Ltd. to extend their current capability of stress prediction in UFT junctions using a FE based neural network approach. Upon completion of training new neural networks, the PIPET program was tested against new, previously unseen, FE data generated for this study with good results. The program was further evaluated by comparing the output from PIPET with FE data obtained from reviewed literature. For the pressure load case, a significant proportion of the data obtained from said literature was within the PIPET predicted stress ranges. with the new version of PIPET tending to calculate slightly lower stresses than the original program. However, whilst the pressure load case comparisons proved useful, the branch bending cases showed less concordance with PIPET's predicted stress ranges.
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Nelson, Stacy A. "The role of sand erosion in the integrity of process pipe-work." Thesis, University of Aberdeen, 2004. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU203463.

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Sand erosion in process pipe-work is one of the key contributors to hydrocarbon leaks in the offshore industry. The parameters influencing the erosion process are numerous and a review of investigations presented in the literature has classified these in terms of particle, fluid and material properties. A review of the mechanistic and empirical erosion models currently available to predict the amount of erosion is also presented. This review highlighted the need for a quantitative investigation into the effect of surface roughness on the erosion process, as this has not been investigated or included in any of the models presented in the literature. The experimental investigations were twofold. The first set of experiments, referred to as the Surface Morphology experiments, utilised optical and scanning electron microscopy (SEM) to investigate the mechanisms of material removal of ductile target materials, when subjected to erosion by sand particles entrained in a liquid medium. Particle impingement was at impact angles oblique (30°) and normal (90°) to the material surface. The second set of experiments, referred to as the Surface Profile experiments, utilised surface profilometry to monitor the changes in the surface profile of mild steel plate specimens, when subjected to erosion at an oblique (30°) impact angle. Fast Fourier Transforms were used to convert the surface profile scans into wave-number spectra, to facilitate better monitoring of the changes in the material surface over the erosion exposure period. Five specimens with initial average surface roughness Ra in the range of 0.7 microm to 1.14 microm were used. The investigation showed that the surface roughness parameter plays a significant role in the erosion process, particularly in the initial stages. The operating conditions of the impinging jet were associated with an equilibrium condition, both for the surface roughness and the eroded depth. As a result, specimens having an initial surface roughness value greater than the equilibrium Rae value showed a decrease in surface roughness, whereas those having an initial value less than the equilibrium value showed an increase in surface roughness. This trend was confirmed by the changes in the amplitudes of the wave-number spectra for each plate, over the erosion period. The eroded depth was greatest for the plate having the smallest absolute difference between the initial Ra value and the equilibrium Rae value. This subsequently decreased as the absolute difference between the initial and equilibrium surface roughness value increased.
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Tossey, Brett M. "Steam Oxidation Resistance of Shot Peened Austenitic Stainless Steel Superheater Tubes." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306261300.

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Herrmann, Andrew F. ""You Have Pipe Bombed our Community": Clashing Metaphors and the Closing of Social Network Site." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/827.

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Tolley, Rebecca. "Pied Piper or Rumpelstiltskin? A Tale of Two Twitter Identities." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etsu-works/5751.

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Yip, Hau-ling Emily. "GIS for ground investigation in bored pile foundation works /." View the Table of Contents & Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B31683551.

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Yip, Hau-ling Emily, and 葉巧玲. "GIS for ground investigation in bored pile foundation works." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B45007950.

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Bowles, John Parish. "Bodies of work autobiography and identity in Adrian Piper's conceptual and performance art /." [S.l. : s.n.], 2002. http://catalog.hathitrust.org/api/volumes/oclc/53916455.html.

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Thesis (Ph.D.)--University of California, Los Angeles, 2002.
Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (p. 238-256).
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Fields, Terry L. "A relational evangelism program for Pine Lake Baptist Church, Stone Mountain, Georgia." Theological Research Exchange Network (TREN), 1995. http://www.tren.com.

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Durak, Oğuz Berke. "Automates WORM et collages de mots et d'images." Paris 7, 2005. http://www.theses.fr/2005PA077135.

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Books on the topic "Pipe work"

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Off-season city pipe: Work. Minneapolis: Coffee House Press, 2005.

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Osika, Jan. Modelowanie matematyczne i symulacja procesu pielgrzymowania rur na zimno. Kraków: Wydawnictwa AGH, 1994.

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Filimonov, G. V. Prokatka t͡s︡irkonievykh trub. Moskva: "Metallurgii͡a︡", 1988.

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Chaplin, Lois Trigg. ACIPCO, American Cast Iron Pipe Company: The golden rule at work since 1905. Birmingham, Ala: [s.n.], 2005.

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Stepanov, V. F. Prostranstvennye kolebanii͡a︡ instrumenta v tekhnologii volochenii͡a︡ trub. Minsk: "Nauka i tekhnika", 1985.

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Guli͡aev, G. I. Uluchshenie kachestva trub i ėkonomii͡a metalla pri redut͡sirovanii. Kiev: "Tėkhnika", 1989.

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Verderevskiĭ, V. A. Rolikovye stany kholodnoĭ prokatki trub. Moskva: "Metallurgii͡a︡", 1992.

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Okleĭ, L. N. Kachestvo gori͡a︡chekatanykh trub. Moskva: "Metallurgii͡a︡", 1986.

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G, Benʹ T., ed. Ėkonomicheskai͡a︡ ėffektivnostʹ termicheskogo uprochnenii͡a︡ prokata i trub. 2nd ed. Moskva: "Metallurgii͡a︡", 1985.

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Hello Kitty glitter activity book. New York: Scholastic, 2002.

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Book chapters on the topic "Pipe work"

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Adrian, Łukasz, Szymon Szufa, Piotr Piersa, Artur Cebula, Sebastian Kowalczyk, Zdzisława Romanowska-Duda, Mieczysław Grzesik, and Joanna Ratajczyk-Szufa. "Thermographic Analysis and Experimental Work Using Laboratory Installation of Heat Transfer Processes in a Heat Pipe Heat Exchanger Utilizing as a Working Fluid R404A and R407C." In Springer Proceedings in Energy, 799–807. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13888-2_77.

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Donkin, Richard. "The Most Important Pile of Bricks in the World." In The History of Work, 57–71. London: Palgrave Macmillan UK, 2010. http://dx.doi.org/10.1057/9780230282179_5.

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Yamaguchi, M., Y. Kimura, H. Takahagi, and M. Okada. "Press-in piling applications: Seawall pile foundation work." In Proceedings of the Second International Conference on Press-in Engineering 2021, Kochi, Japan, 464–72. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003215226-52.

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Mead, Jenna. "Medievalism and Memory Work: Archer’s Folly and the Gothic Revival Pile." In Medievalism and the Gothic in Australian Culture, 99–118. Turnhout: Brepols Publishers, 2005. http://dx.doi.org/10.1484/m.mmages-eb.4.000027.

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Ogrodniczuk, John S. "William E. Piper: Negotiating the complexities of psychotherapy." In Bringing psychotherapy research to life: Understanding change through the work of leading clinical researchers., 339–49. Washington: American Psychological Association, 2010. http://dx.doi.org/10.1037/12137-029.

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Asanami, Fumika, and Mahito Kamada. "Social System in Collaborative Activities for Conserving Coastal Pine Forest in Karatsu City, Kyusyu, Japan." In Ecological Research Monographs, 459–70. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6791-6_27.

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AbstractWe studied the social system to maintain collaborative activities for restoring and conserving coastal pine forests in Karatsu City, Saga Prefecture, Kyushu, Japan. Governance has been structured and functioned in most conservation processes; administrative offices of the state, prefecture, and city, business sector, and Civil Society Organization have acted interdependently, and network members have continuous interaction under the management of an NPO group known as KANNE. KANNE has filled in a structural hole in the social network. KANNE plays a special role as the hub. Social ties, however, are very weak, and hence the system continuity is fragile. If KANNE stops its work, the network structure will collapse. As an internal circumstance of KANNE, most management works have been governed by the secretary-general, and any person who can act as a substitute is now absent. Installing a system to develop human resources within KANNE is important to retain conservation activities.
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Sattarov, Robert, Xinhao Huang, Cong Lin, and Lingfei Xiao. "Worm-Like Locomotion Systems for In-Pipe Robots and Its Fuzzy Sliding Mode Controller Design." In Proceedings of 15th International Conference on Electromechanics and Robotics "Zavalishin's Readings", 39–51. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5580-0_3.

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Weitzl, Wolfgang, and Robert Zniva. "Measuring Trust in Electronic Word of Mouth: A Rigid Research Framework." In Celebrating America’s Pastimes: Baseball, Hot Dogs, Apple Pie and Marketing?, 755–60. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26647-3_161.

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Wang, Fei, Songxian Huang, and Wen Chen. "Analysis on Surrounding Environment Influence Induced by Rectangular Pipe Jacking and the Control Scheme." In Advances in Transdisciplinary Engineering. IOS Press, 2021. http://dx.doi.org/10.3233/atde210175.

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Based on rectangular pipe jacking project of the No.1 entrance of Qingshi Road station on Wuxi metro Line 4, to analysis how different treating methods work in the aspect of vertical deformation of the pile foundation around the pipe jacking tunnel and the ground settlement during pipe-jacking construction process, a 3-D finite element simulation model which simulate the process of rectangular pipe jacking crossing under viaduct is established. Some conclusions is drawn as follow: (1) the combination of isolation piles and shallow soils grouting reinforcements can constrain the vertical and horizontal deformation of the pile foundation and ground settlement caused by rectangular pipe jacking. (2) Both the maximum ground settlement and maximum ground heave can meet the requirement of special monitoring. (3) The result of the simulation is basically consistent with on-site monitoring data, which can prove the availability of the simulation and the treatment scheme.
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Stevenson, Robert Louis. "Chapter IV Devil-Work." In South Sea Tales. Oxford University Press, 2008. http://dx.doi.org/10.1093/owc/9780199536085.003.0006.

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Near a month went by without much doing. The same night of our marriage Galoshes called round, and made himself mighty civil, and got into a habit of dropping in about dark and smoking his pipe with the family. He could talk to Uma,...
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Conference papers on the topic "Pipe work"

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Bell, Graham E. C., and Andrew E. Romer. "Making 'Baggies' Work for Ductile Iron Pipe." In Pipeline Division Specialty Congress 2004. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40745(146)77.

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Reid, Robert S., Michael A. Merrigan, and J. Tom Sena. "Review of liquid metal heat pipe work at Los Alamos." In Proceedings of the eighth symposium on space nuclear power systems. AIP, 1991. http://dx.doi.org/10.1063/1.40058.

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D’AGOSTINO, TOMMY, MICHELE MEO, and MAURO ZARRELLI. "Bio-robotic ROV Design for Pipe-work Opto-sensorial Safety-inspections." In Structural Health Monitoring 2017. Lancaster, PA: DEStech Publications, Inc., 2017. http://dx.doi.org/10.12783/shm2017/13884.

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Vieira, Ronald E., Thiana A. Sedrez, Siamack A. Shirazi, and Gabriel Silva. "Multiphase Flow in Circular and Triangular Pipes: Examining Flow Characteristics, Sand Erosion and Heat Transfer Via CFD and Experimental Work." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/208101-ms.

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Abstract Air-water two-phase flow in circular pipes has been studied by many investigators. However, investigations of multiphase flow in non-circular pipes are still very rare. Triangular pipes have found a number of applications, such as multiphase flow conditioning, erosion mitigation in elbows, compact heat exchanges, solar heat collectors, and electronic cooling systems. This work presents a survey of air-water and air-water-sand flow through circular and triangular pipes. The main objective of this investigation is to study the potential effects of triangular pipe geometry on flow patterns, slug frequency, sand erosion in elbows, and heat transfer in multiphase flow. Firstly, twenty-three experiments were performed for horizontal air-water flow. Detailed videos and slug frequency measurements were collected through circular and triangular clear pipes to identify flow patterns and create a database for these pipe configurations. The effect of corners of the triangular pipe on the liquid distribution was investigated using two different orientations of triangular pipe: apex upward and downward and results of triangular pipes were compared to round tubes. Secondly, ultrasonic wall thickness erosion measurements, paint removal studies, and CFD simulations were carried out to investigate the erosion patterns and magnitudes for liquid-sand and liquid-gas-sand flows in circular and triangular elbows with the same radius of curvature and cross-sectional area. Thirdly, heat transfer rates for liquid flows were also simulated for both circular and triangular pipe cross-sections. Although similar flow patterns are observed in circular and triangular pipe configurations, the orientation of the triangular pipes seems to have an effect on the liquid distribution and slug frequency. For higher liquid rates, slug frequencies are consistently lower in the triangular pipe as compared to the circular pipe. Similarly, the triangular elbow offers better flow behavior as compared to circular elbows when investigated numerically with similar flow rates for erosion patterns for both liquid-sand flow and liquid-gas-sand flows. Experimental and CFD results show that erosion in the circular elbow is about three times larger than in the triangular elbow. Paint studies results validated erosion patterns and their relations with particle impacts. Finally, heat transfer to/from triangular pipes is shown to be more efficient than in circular pipes, making them attractive for compact heat exchangers and heat collectors. This paper represents a novel experimental work and CFD simulations to examine the effects of pipe geometries on multiphase flow in pipes with several practical applications. The present results will help to determine the efficiency of utilizing triangular pipes as compared to circular pipes for several important applications and field operations such as reducing slug frequencies of multiphase flow in pipes, and reducing solid particle erosion of elbows, and also increasing the efficiency of heat exchangers.
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Gonsalves, Nihar J., Mohamad Khalid, Abiola Akinniyi, and Abiola Akanmu. "Industry Perspectives of the Potential of Wearable Robot for Pipe Installation Work." In 39th International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2022. http://dx.doi.org/10.22260/isarc2022/0060.

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Chen, Chien-Chih, and Chen-Ching Ting. "Developing the Coaxial Dual-Pipe Heat Pipe for Applications of Heat Pipe Cooler." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38438.

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This article presents significant experimental data about the coaxial dual-pipe heat pipe which is new developed for applications of the heat pipe cooler in our CCT laboratory. It’s well known that heat pipe integrated with cooling plates has changed the heat transfer property of the heat pipe to be similar to copper pipe, where the heat transfer property of the bare heat pipe is discrete and the copper pipe is continuous. The integrated cooling plates cause the original heat transfer property of the heat pipe to be destroyed. For recovery of the original heat transfer property of the heat pipe in a heat pipe cooler, the coaxial dual-pipe heat pipe built a coaxial pipe inside the heat pipe in the thermal insulating section to avoid the heat of vapor being earlier taken away in the thermal insulating section. Experimental study in this work first built a home-made square coaxial dual-pipe heat pipe integrated with outside isothermal cycling cooling water. The home-made square coaxial dual-pipe heat pipe has an observation window and is convenient to observe the change of two-phase flow inside the heat pipe influenced by the outside cooling water. The results show that the new developed dual-pipe heat pipe cooler has kept the original heat transfer property of the bare heat pipe and therefore increases its cooling efficiency clearly.
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Sheremetov, Leonid, Ildar Batyrshin, Manuel Chi, Eduardo Vergara, and Arturo Rosales. "Knowledge-based Collaborative Engineering of Pipe Networks in the Upstream and Downstream Petroleum Industry." In 2007 11th International Conference on Computer Supported Cooperative Work in Design. IEEE, 2007. http://dx.doi.org/10.1109/cscwd.2007.4281479.

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8

Hamada, Masahiko, Hidenori Shitamoto, Shuji Okaguchi, Nobuaki Takahashi, Izumi Takeuchi, Yoshiyuki Matsuhiro, and Shusuke Fujita. "Pipe Bending Test With Girth Welding on X80 Grade SAW Pipes." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31433.

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This study was planned as a part of a test program to confirm the effect of girth welds on the strain capacity of pipes. In this study, full-scale pipe bending tests are performed by using X80 SAW pipe. This paper covers pipe manufacturing procedure, developed welding procedure to obtain even match weld metal and properties of welded joints. And this work demonstrated that the X80 pipes welded under the developed procedure fractured in base metal remote from girth welded portion by full scale pipe bending test conducted under the internal pressure of 72% SMYS of X80.
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Gay Neto, Alfredo, Guilherme Rosa Franzini, Clóvis de Arruda Martins, Celso Pupo Pesce, and Eduardo Ribeiro Malta. "Crush Behavior of Multilayered Pipes: Study of Pipe Integrity and Kinematic Assumptions." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10263.

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The crush of multilayer pipes is an important problem in mechanics. Many types of devices may be used to apply radial forces to keep a pipe fixed when it is loaded in the axial direction. To address this problem, one could use analytical or numerical approaches, dealing with the local bending of each cross section of the pipe. For taking into account the material and geometric nonlinearities, a finite element model can be also used. This work applies a numerical 2D model to address the crush problem caused by shoes applying radial loads in three-layered pipes. The inner and the outer layers are metallic, and the intermediate one polymeric. All the materials are considered to be nonlinear, being the metallic materials elastic-plastic. The polymeric material is assumed to have a nonlinear behavior. The main objective of the work is to study the pipe integrity and discuss the kinematics of the pipe layers when crushed. Two distinct conditions are considered: (i) slippage and gaps formations are allowed between the layers or (ii) the three layers are ideally adhered to each other. The effect of parametric variations of friction between layers is analyzed. This kinematics discussion is addressed by increasing the number of crushing loads applied to the pipe, from two to sixteen loads, from which a limit is inferred. The results and conclusions may be employed as a basis for improving simpler analytical models to face the same problem.
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Toscano, Rita G., Javier Raffo, Marcelo Fritz, Ronaldo C. Silva, Joshua Hines, and Chris Timms. "Modeling the UOE Pipe Manufacturing Process." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57605.

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It has been demonstrated in previous work that, for deepwater applications, the cold forming processes involved in UOE pipe manufacturing significantly reduces pipe collapse strength. To improve the understanding of these manufacturing effects, Tenaris has embarked on a program to model the phases of the UOE manufacturing process using finite element analysis simulations. Phase 1 of this work, presented previously in the literature [1], formulated the basis for the model development and described the 2D approach taken to model the various steps of manufacture. This paper presents the results of the Phase 2 work, and includes a description of the enhancements made to the modeling approach, a summary of the full-scale collapse testing performed at C-FER, and a comparison of the model predictions to the test results. Variations are made to the simulated manufacturing process in order to evaluate the sensitivity of collapse strength to key parameters. Based on the modeling approach taken, the findings of the Phase 2 work have shown that the deterioration of the collapse pressure diminishes with increasing O-press compression. The residual stress value is the most sensitive parameter when the strain hardening varies. It increases with the compression ratio and with the strain hardening value. In addition, given the assumed compression ratio of the test pipes, predictive behavior of the test results was found to be acceptable.
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Reports on the topic "Pipe work"

1

Bergeron, B. Site 200 - Building 225 Construction ProjectSTEEL PIPE ABANDONMENT WORK PLAN (October 2020). Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1673192.

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Author, Not Given. SPDV Pile Shallow Groundwater Investigation Work Plan. Office of Scientific and Technical Information (OSTI), March 2007. http://dx.doi.org/10.2172/990753.

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Johnson, R. Chestnut Ridge Borrow Area Waste Pile work plan. Office of Scientific and Technical Information (OSTI), August 1991. http://dx.doi.org/10.2172/6263530.

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Author, Not Given. SPDV Pile Shallow Groundwater Investigation Work Plan (Rev. 1). Office of Scientific and Technical Information (OSTI), March 2007. http://dx.doi.org/10.2172/990754.

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Author, Not Given. SPDV Pile Shallow Groundwater Investigation Work Plan (Rev. 2). Office of Scientific and Technical Information (OSTI), May 2007. http://dx.doi.org/10.2172/990756.

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6

Mudryj, Igor, and Igor Ivaneіko. The Use of Small Drilling Equipment in the Arrangement of Pile Foundations in Compressed Conditions. Intellectual Archive, September 2022. http://dx.doi.org/10.32370/ia_2022_09_11.

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The procedure for finding technological parameters for the installation of pile foundations with small-sized drilling rigs, when developing design and technological documentation in compressed construction conditions, is considered. Methodological approaches to the choice of technologies for the construction of pile foundations are shown, depending on the dimensions of the small-sized drilling machines used, the required area for their placement, storage areas, and auxiliary equipment. in compressed conditions of construction. The existing normative documents do not set out separate requirements for the development of projects for the execution of works in compressed construction conditions, these norms do not provide for the definition of rational erection schemes for the selected set of mechanization in the dimensions of a specific construction site, which is characterized by various restrictions and obstacles. The proposed requirements for the use of mechanization methods in the conditions of compacted buildings during the installation of pile foundations based on a preliminary analysis of the parameters of the construction site: engineering and geological condition of the site; internal brevity of the designed structure; external brevity of the construction site; dimensions of the driving car; sites for the location of additional equipment, warehouses, unloading areas. Taking into account practical experience in the development of work projects and the analysis of current regulatory documents, made it possible to establish the main requirements for the use of small-sized drilling rigs in densely built-up conditions.
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McMurtrey, M. D., G. Ilevbare, and I. Van Rooyen. Report on technical activities and technical plan for university advanced manufacturing work for in-pile sensors. Office of Scientific and Technical Information (OSTI), September 2017. http://dx.doi.org/10.2172/1473593.

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8

Foley, R. D., and K. S. Brown. Results of the radiological survey at the former ALCOA New Kensington Works, Pine and Ninth Streets, New Kensington, Pennsylvania (ANK002). Office of Scientific and Technical Information (OSTI), October 1992. http://dx.doi.org/10.2172/6928789.

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9

Boyle, Maxwell, and Elizabeth Rico. Terrestrial vegetation monitoring at Cape Hatteras National Seashore: 2019 data summary. National Park Service, January 2022. http://dx.doi.org/10.36967/nrr-2290019.

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The Southeast Coast Network (SECN) conducts long-term terrestrial vegetation monitoring as part of the nationwide Inventory and Monitoring Program of the National Park Service (NPS). The vegetation community vital sign is one of the primary-tier resources identified by SECN park managers, and monitoring is currently conducted at 15 network parks (DeVivo et al. 2008). Monitoring plants and their associated communities over time allows for targeted understanding of ecosystems within the SECN geography, which provides managers information about the degree of change within their parks’ natural vegetation. The first year of conducting this monitoring effort at four SECN parks, including 52 plots on Cape Hatteras National Seashore (CAHA), was 2019. Twelve vegetation plots were established at Cape Hatteras NS in July and August. Data collected in each plot included species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree (greater than 10 centimeters [3.9 inches {in}]) diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass (i.e., fuel load) estimates. This report summarizes the baseline (year 1) terrestrial vegetation data collected at Cape Hatteras National Seashore in 2019. Data were stratified across four dominant broadly defined habitats within the park (Maritime Tidal Wetlands, Maritime Nontidal Wetlands, Maritime Open Uplands, and Maritime Upland Forests and Shrublands) and four land parcels (Bodie Island, Buxton, Hatteras Island, and Ocracoke Island). Noteworthy findings include: A total of 265 vascular plant taxa (species or lower) were observed across 52 vegetation plots, including 13 species not previously documented within the park. The most frequently encountered species in each broadly defined habitat included: Maritime Tidal Wetlands: saltmeadow cordgrass Spartina patens), swallow-wort (Pattalias palustre), and marsh fimbry (Fimbristylis castanea) Maritime Nontidal Wetlands: common wax-myrtle (Morella cerifera), saltmeadow cordgrass, eastern poison ivy (Toxicodendron radicans var. radicans), and saw greenbriar (Smilax bona-nox) Maritime Open Uplands: sea oats (Uniola paniculata), dune camphorweed (Heterotheca subaxillaris), and seabeach evening-primrose (Oenothera humifusa) Maritime Upland Forests and Shrublands: : loblolly pine (Pinus taeda), southern/eastern red cedar (Juniperus silicicola + virginiana), common wax-myrtle, and live oak (Quercus virginiana). Five invasive species identified as either a Severe Threat (Rank 1) or Significant Threat (Rank 2) to native plants by the North Carolina Native Plant Society (Buchanan 2010) were found during this monitoring effort. These species (and their overall frequency of occurrence within all plots) included: alligatorweed (Alternanthera philoxeroides; 2%), Japanese honeysuckle (Lonicera japonica; 10%), Japanese stilt-grass (Microstegium vimineum; 2%), European common reed (Phragmites australis; 8%), and common chickweed (Stellaria media; 2%). Eighteen rare species tracked by the North Carolina Natural Heritage Program (Robinson 2018) were found during this monitoring effort, including two species—cypress panicgrass (Dichanthelium caerulescens) and Gulf Coast spikerush (Eleocharis cellulosa)—listed as State Endangered by the Plant Conservation Program of the North Carolina Department of Agriculture and Consumer Services (NCPCP 2010). Southern/eastern red cedar was a dominant species within the tree stratum of both Maritime Nontidal Wetland and Maritime Upland Forest and Shrubland habitat types. Other dominant tree species within CAHA forests included loblolly pine, live oak, and Darlington oak (Quercus hemisphaerica). One hundred percent of the live swamp bay (Persea palustris) trees measured in these plots were experiencing declining vigor and observed with symptoms like those caused by laurel wilt......less
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Shani, Uri, Lynn Dudley, Alon Ben-Gal, Menachem Moshelion, and Yajun Wu. Root Conductance, Root-soil Interface Water Potential, Water and Ion Channel Function, and Tissue Expression Profile as Affected by Environmental Conditions. United States Department of Agriculture, October 2007. http://dx.doi.org/10.32747/2007.7592119.bard.

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Constraints on water resources and the environment necessitate more efficient use of water. The key to efficient management is an understanding of the physical and physiological processes occurring in the soil-root hydraulic continuum.While both soil and plant leaf water potentials are well understood, modeled and measured, the root-soil interface where actual uptake processes occur has not been sufficiently studied. The water potential at the root-soil interface (yᵣₒₒₜ), determined by environmental conditions and by soil and plant hydraulic properties, serves as a boundary value in soil and plant uptake equations. In this work, we propose to 1) refine and implement a method for measuring yᵣₒₒₜ; 2) measure yᵣₒₒₜ, water uptake and root hydraulic conductivity for wild type tomato and Arabidopsis under varied q, K⁺, Na⁺ and Cl⁻ levels in the root zone; 3) verify the role of MIPs and ion channels response to q, K⁺ and Na⁺ levels in Arabidopsis and tomato; 4) study the relationships between yᵣₒₒₜ and root hydraulic conductivity for various crops representing important botanical and agricultural species, under conditions of varying soil types, water contents and salinity; and 5) integrate the above to water uptake term(s) to be implemented in models. We have made significant progress toward establishing the efficacy of the emittensiometer and on the molecular biology studies. We have added an additional method for measuring ψᵣₒₒₜ. High-frequency water application through the water source while the plant emerges and becomes established encourages roots to develop towards and into the water source itself. The yᵣₒₒₜ and yₛₒᵢₗ values reflected wetting and drying processes in the rhizosphere and in the bulk soil. Thus, yᵣₒₒₜ can be manipulated by changing irrigation level and frequency. An important and surprising finding resulting from the current research is the obtained yᵣₒₒₜ value. The yᵣₒₒₜ measured using the three different methods: emittensiometer, micro-tensiometer and MRI imaging in both sunflower, tomato and corn plants fell in the same range and were higher by one to three orders of magnitude from the values of -600 to -15,000 cm suggested in the literature. We have added additional information on the regulation of aquaporins and transporters at the transcript and protein levels, particularly under stress. Our preliminary results show that overexpression of one aquaporin gene in tomato dramatically increases its transpiration level (unpublished results). Based on this information, we started screening mutants for other aquaporin genes. During the feasibility testing year, we identified homozygous mutants for eight aquaporin genes, including six mutants for five of the PIP2 genes. Including the homozygous mutants directly available at the ABRC seed stock center, we now have mutants for 11 of the 19 aquaporin genes of interest. Currently, we are screening mutants for other aquaporin genes and ion transporter genes. Understanding plant water uptake under stress is essential for the further advancement of molecular plant stress tolerance work as well as for efficient use of water in agriculture. Virtually all of Israel’s agriculture and about 40% of US agriculture is made possible by irrigation. Both countries face increasing risk of water shortages as urban requirements grow. Both countries will have to find methods of protecting the soil resource while conserving water resources—goals that appear to be in direct conflict. The climate-plant-soil-water system is nonlinear with many feedback mechanisms. Conceptual plant uptake and growth models and mechanism-based computer-simulation models will be valuable tools in developing irrigation regimes and methods that maximize the efficiency of agricultural water. This proposal will contribute to the development of these models by providing critical information on water extraction by the plant that will result in improved predictions of both water requirements and crop yields. Plant water use and plant response to environmental conditions cannot possibly be understood by using the tools and language of a single scientific discipline. This proposal links the disciplines of soil physics and soil physical chemistry with plant physiology and molecular biology in order to correctly treat and understand the soil-plant interface in terms of integrated comprehension. Results from the project will contribute to a mechanistic understanding of the SPAC and will inspire continued multidisciplinary research.
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